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Diffstat (limited to 'libs/assimp/contrib/pugixml/src/pugixml.cpp')
| -rw-r--r-- | libs/assimp/contrib/pugixml/src/pugixml.cpp | 13020 |
1 files changed, 0 insertions, 13020 deletions
diff --git a/libs/assimp/contrib/pugixml/src/pugixml.cpp b/libs/assimp/contrib/pugixml/src/pugixml.cpp deleted file mode 100644 index efdcdf6..0000000 --- a/libs/assimp/contrib/pugixml/src/pugixml.cpp +++ /dev/null @@ -1,13020 +0,0 @@ -/** - * pugixml parser - version 1.11 - * -------------------------------------------------------- - * Copyright (C) 2006-2020, by Arseny Kapoulkine (arseny.kapoulkine@gmail.com) - * Report bugs and download new versions at https://pugixml.org/ - * - * This library is distributed under the MIT License. See notice at the end - * of this file. - * - * This work is based on the pugxml parser, which is: - * Copyright (C) 2003, by Kristen Wegner (kristen@tima.net) - */ - -#ifndef SOURCE_PUGIXML_CPP -#define SOURCE_PUGIXML_CPP - -#include "pugixml.hpp" - -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <assert.h> -#include <limits.h> - -#ifdef PUGIXML_WCHAR_MODE -# include <wchar.h> -#endif - -#ifndef PUGIXML_NO_XPATH -# include <math.h> -# include <float.h> -#endif - -#ifndef PUGIXML_NO_STL -# include <istream> -# include <ostream> -# include <string> -#endif - -// For placement new -#include <new> - -#ifdef _MSC_VER -# pragma warning(push) -# pragma warning(disable: 4127) // conditional expression is constant -# pragma warning(disable: 4324) // structure was padded due to __declspec(align()) -# pragma warning(disable: 4702) // unreachable code -# pragma warning(disable: 4996) // this function or variable may be unsafe -#endif - -#if defined(_MSC_VER) && defined(__c2__) -# pragma clang diagnostic push -# pragma clang diagnostic ignored "-Wdeprecated" // this function or variable may be unsafe -#endif - -#ifdef __INTEL_COMPILER -# pragma warning(disable: 177) // function was declared but never referenced -# pragma warning(disable: 279) // controlling expression is constant -# pragma warning(disable: 1478 1786) // function was declared "deprecated" -# pragma warning(disable: 1684) // conversion from pointer to same-sized integral type -#endif - -#if defined(__BORLANDC__) && defined(PUGIXML_HEADER_ONLY) -# pragma warn -8080 // symbol is declared but never used; disabling this inside push/pop bracket does not make the warning go away -#endif - -#ifdef __BORLANDC__ -# pragma option push -# pragma warn -8008 // condition is always false -# pragma warn -8066 // unreachable code -#endif - -#ifdef __SNC__ -// Using diag_push/diag_pop does not disable the warnings inside templates due to a compiler bug -# pragma diag_suppress=178 // function was declared but never referenced -# pragma diag_suppress=237 // controlling expression is constant -#endif - -#ifdef __TI_COMPILER_VERSION__ -# pragma diag_suppress 179 // function was declared but never referenced -#endif - -// Inlining controls -#if defined(_MSC_VER) && _MSC_VER >= 1300 -# define PUGI__NO_INLINE __declspec(noinline) -#elif defined(__GNUC__) -# define PUGI__NO_INLINE __attribute__((noinline)) -#else -# define PUGI__NO_INLINE -#endif - -// Branch weight controls -#if defined(__GNUC__) && !defined(__c2__) -# define PUGI__UNLIKELY(cond) __builtin_expect(cond, 0) -#else -# define PUGI__UNLIKELY(cond) (cond) -#endif - -// Simple static assertion -#define PUGI__STATIC_ASSERT(cond) { static const char condition_failed[(cond) ? 1 : -1] = {0}; (void)condition_failed[0]; } - -// Digital Mars C++ bug workaround for passing char loaded from memory via stack -#ifdef __DMC__ -# define PUGI__DMC_VOLATILE volatile -#else -# define PUGI__DMC_VOLATILE -#endif - -// Integer sanitizer workaround; we only apply this for clang since gcc8 has no_sanitize but not unsigned-integer-overflow and produces "attribute directive ignored" warnings -#if defined(__clang__) && defined(__has_attribute) -# if __has_attribute(no_sanitize) -# define PUGI__UNSIGNED_OVERFLOW __attribute__((no_sanitize("unsigned-integer-overflow"))) -# else -# define PUGI__UNSIGNED_OVERFLOW -# endif -#else -# define PUGI__UNSIGNED_OVERFLOW -#endif - -// Borland C++ bug workaround for not defining ::memcpy depending on header include order (can't always use std::memcpy because some compilers don't have it at all) -#if defined(__BORLANDC__) && !defined(__MEM_H_USING_LIST) -using std::memcpy; -using std::memmove; -using std::memset; -#endif - -// Some MinGW/GCC versions have headers that erroneously omit LLONG_MIN/LLONG_MAX/ULLONG_MAX definitions from limits.h in some configurations -#if defined(PUGIXML_HAS_LONG_LONG) && defined(__GNUC__) && !defined(LLONG_MAX) && !defined(LLONG_MIN) && !defined(ULLONG_MAX) -# define LLONG_MIN (-LLONG_MAX - 1LL) -# define LLONG_MAX __LONG_LONG_MAX__ -# define ULLONG_MAX (LLONG_MAX * 2ULL + 1ULL) -#endif - -// In some environments MSVC is a compiler but the CRT lacks certain MSVC-specific features -#if defined(_MSC_VER) && !defined(__S3E__) -# define PUGI__MSVC_CRT_VERSION _MSC_VER -#endif - -// Not all platforms have snprintf; we define a wrapper that uses snprintf if possible. This only works with buffers with a known size. -#if __cplusplus >= 201103 -# define PUGI__SNPRINTF(buf, ...) snprintf(buf, sizeof(buf), __VA_ARGS__) -#elif defined(PUGI__MSVC_CRT_VERSION) && PUGI__MSVC_CRT_VERSION >= 1400 -# define PUGI__SNPRINTF(buf, ...) _snprintf_s(buf, _countof(buf), _TRUNCATE, __VA_ARGS__) -#else -# define PUGI__SNPRINTF sprintf -#endif - -// We put implementation details into an anonymous namespace in source mode, but have to keep it in non-anonymous namespace in header-only mode to prevent binary bloat. -#ifdef PUGIXML_HEADER_ONLY -# define PUGI__NS_BEGIN namespace pugi { namespace impl { -# define PUGI__NS_END } } -# define PUGI__FN inline -# define PUGI__FN_NO_INLINE inline -#else -# if defined(_MSC_VER) && _MSC_VER < 1300 // MSVC6 seems to have an amusing bug with anonymous namespaces inside namespaces -# define PUGI__NS_BEGIN namespace pugi { namespace impl { -# define PUGI__NS_END } } -# else -# define PUGI__NS_BEGIN namespace pugi { namespace impl { namespace { -# define PUGI__NS_END } } } -# endif -# define PUGI__FN -# define PUGI__FN_NO_INLINE PUGI__NO_INLINE -#endif - -// uintptr_t -#if (defined(_MSC_VER) && _MSC_VER < 1600) || (defined(__BORLANDC__) && __BORLANDC__ < 0x561) -namespace pugi -{ -# ifndef _UINTPTR_T_DEFINED - typedef size_t uintptr_t; -# endif - - typedef unsigned __int8 uint8_t; - typedef unsigned __int16 uint16_t; - typedef unsigned __int32 uint32_t; -} -#else -# include <stdint.h> -#endif - -// Memory allocation -PUGI__NS_BEGIN - PUGI__FN void* default_allocate(size_t size) - { - return malloc(size); - } - - PUGI__FN void default_deallocate(void* ptr) - { - free(ptr); - } - - template <typename T> - struct xml_memory_management_function_storage - { - static allocation_function allocate; - static deallocation_function deallocate; - }; - - // Global allocation functions are stored in class statics so that in header mode linker deduplicates them - // Without a template<> we'll get multiple definitions of the same static - template <typename T> allocation_function xml_memory_management_function_storage<T>::allocate = default_allocate; - template <typename T> deallocation_function xml_memory_management_function_storage<T>::deallocate = default_deallocate; - - typedef xml_memory_management_function_storage<int> xml_memory; -PUGI__NS_END - -// String utilities -PUGI__NS_BEGIN - // Get string length - PUGI__FN size_t strlength(const char_t* s) - { - assert(s); - - #ifdef PUGIXML_WCHAR_MODE - return wcslen(s); - #else - return strlen(s); - #endif - } - - // Compare two strings - PUGI__FN bool strequal(const char_t* src, const char_t* dst) - { - assert(src && dst); - - #ifdef PUGIXML_WCHAR_MODE - return wcscmp(src, dst) == 0; - #else - return strcmp(src, dst) == 0; - #endif - } - - // Compare lhs with [rhs_begin, rhs_end) - PUGI__FN bool strequalrange(const char_t* lhs, const char_t* rhs, size_t count) - { - for (size_t i = 0; i < count; ++i) - if (lhs[i] != rhs[i]) - return false; - - return lhs[count] == 0; - } - - // Get length of wide string, even if CRT lacks wide character support - PUGI__FN size_t strlength_wide(const wchar_t* s) - { - assert(s); - - #ifdef PUGIXML_WCHAR_MODE - return wcslen(s); - #else - const wchar_t* end = s; - while (*end) end++; - return static_cast<size_t>(end - s); - #endif - } -PUGI__NS_END - -// auto_ptr-like object for exception recovery -PUGI__NS_BEGIN - template <typename T> struct auto_deleter - { - typedef void (*D)(T*); - - T* data; - D deleter; - - auto_deleter(T* data_, D deleter_): data(data_), deleter(deleter_) - { - } - - ~auto_deleter() - { - if (data) deleter(data); - } - - T* release() - { - T* result = data; - data = 0; - return result; - } - }; -PUGI__NS_END - -#ifdef PUGIXML_COMPACT -PUGI__NS_BEGIN - class compact_hash_table - { - public: - compact_hash_table(): _items(0), _capacity(0), _count(0) - { - } - - void clear() - { - if (_items) - { - xml_memory::deallocate(_items); - _items = 0; - _capacity = 0; - _count = 0; - } - } - - void* find(const void* key) - { - if (_capacity == 0) return 0; - - item_t* item = get_item(key); - assert(item); - assert(item->key == key || (item->key == 0 && item->value == 0)); - - return item->value; - } - - void insert(const void* key, void* value) - { - assert(_capacity != 0 && _count < _capacity - _capacity / 4); - - item_t* item = get_item(key); - assert(item); - - if (item->key == 0) - { - _count++; - item->key = key; - } - - item->value = value; - } - - bool reserve(size_t extra = 16) - { - if (_count + extra >= _capacity - _capacity / 4) - return rehash(_count + extra); - - return true; - } - - private: - struct item_t - { - const void* key; - void* value; - }; - - item_t* _items; - size_t _capacity; - - size_t _count; - - bool rehash(size_t count); - - item_t* get_item(const void* key) - { - assert(key); - assert(_capacity > 0); - - size_t hashmod = _capacity - 1; - size_t bucket = hash(key) & hashmod; - - for (size_t probe = 0; probe <= hashmod; ++probe) - { - item_t& probe_item = _items[bucket]; - - if (probe_item.key == key || probe_item.key == 0) - return &probe_item; - - // hash collision, quadratic probing - bucket = (bucket + probe + 1) & hashmod; - } - - assert(false && "Hash table is full"); // unreachable - return 0; - } - - static PUGI__UNSIGNED_OVERFLOW unsigned int hash(const void* key) - { - unsigned int h = static_cast<unsigned int>(reinterpret_cast<uintptr_t>(key) & 0xffffffff); - - // MurmurHash3 32-bit finalizer - h ^= h >> 16; - h *= 0x85ebca6bu; - h ^= h >> 13; - h *= 0xc2b2ae35u; - h ^= h >> 16; - - return h; - } - }; - - PUGI__FN_NO_INLINE bool compact_hash_table::rehash(size_t count) - { - size_t capacity = 32; - while (count >= capacity - capacity / 4) - capacity *= 2; - - compact_hash_table rt; - rt._capacity = capacity; - rt._items = static_cast<item_t*>(xml_memory::allocate(sizeof(item_t) * capacity)); - - if (!rt._items) - return false; - - memset(rt._items, 0, sizeof(item_t) * capacity); - - for (size_t i = 0; i < _capacity; ++i) - if (_items[i].key) - rt.insert(_items[i].key, _items[i].value); - - if (_items) - xml_memory::deallocate(_items); - - _capacity = capacity; - _items = rt._items; - - assert(_count == rt._count); - - return true; - } - -PUGI__NS_END -#endif - -PUGI__NS_BEGIN -#ifdef PUGIXML_COMPACT - static const uintptr_t xml_memory_block_alignment = 4; -#else - static const uintptr_t xml_memory_block_alignment = sizeof(void*); -#endif - - // extra metadata bits - static const uintptr_t xml_memory_page_contents_shared_mask = 64; - static const uintptr_t xml_memory_page_name_allocated_mask = 32; - static const uintptr_t xml_memory_page_value_allocated_mask = 16; - static const uintptr_t xml_memory_page_type_mask = 15; - - // combined masks for string uniqueness - static const uintptr_t xml_memory_page_name_allocated_or_shared_mask = xml_memory_page_name_allocated_mask | xml_memory_page_contents_shared_mask; - static const uintptr_t xml_memory_page_value_allocated_or_shared_mask = xml_memory_page_value_allocated_mask | xml_memory_page_contents_shared_mask; - -#ifdef PUGIXML_COMPACT - #define PUGI__GETHEADER_IMPL(object, page, flags) // unused - #define PUGI__GETPAGE_IMPL(header) (header).get_page() -#else - #define PUGI__GETHEADER_IMPL(object, page, flags) (((reinterpret_cast<char*>(object) - reinterpret_cast<char*>(page)) << 8) | (flags)) - // this macro casts pointers through void* to avoid 'cast increases required alignment of target type' warnings - #define PUGI__GETPAGE_IMPL(header) static_cast<impl::xml_memory_page*>(const_cast<void*>(static_cast<const void*>(reinterpret_cast<const char*>(&header) - (header >> 8)))) -#endif - - #define PUGI__GETPAGE(n) PUGI__GETPAGE_IMPL((n)->header) - #define PUGI__NODETYPE(n) static_cast<xml_node_type>((n)->header & impl::xml_memory_page_type_mask) - - struct xml_allocator; - - struct xml_memory_page - { - static xml_memory_page* construct(void* memory) - { - xml_memory_page* result = static_cast<xml_memory_page*>(memory); - - result->allocator = 0; - result->prev = 0; - result->next = 0; - result->busy_size = 0; - result->freed_size = 0; - - #ifdef PUGIXML_COMPACT - result->compact_string_base = 0; - result->compact_shared_parent = 0; - result->compact_page_marker = 0; - #endif - - return result; - } - - xml_allocator* allocator; - - xml_memory_page* prev; - xml_memory_page* next; - - size_t busy_size; - size_t freed_size; - - #ifdef PUGIXML_COMPACT - char_t* compact_string_base; - void* compact_shared_parent; - uint32_t* compact_page_marker; - #endif - }; - - static const size_t xml_memory_page_size = - #ifdef PUGIXML_MEMORY_PAGE_SIZE - (PUGIXML_MEMORY_PAGE_SIZE) - #else - 32768 - #endif - - sizeof(xml_memory_page); - - struct xml_memory_string_header - { - uint16_t page_offset; // offset from page->data - uint16_t full_size; // 0 if string occupies whole page - }; - - struct xml_allocator - { - xml_allocator(xml_memory_page* root): _root(root), _busy_size(root->busy_size) - { - #ifdef PUGIXML_COMPACT - _hash = 0; - #endif - } - - xml_memory_page* allocate_page(size_t data_size) - { - size_t size = sizeof(xml_memory_page) + data_size; - - // allocate block with some alignment, leaving memory for worst-case padding - void* memory = xml_memory::allocate(size); - if (!memory) return 0; - - // prepare page structure - xml_memory_page* page = xml_memory_page::construct(memory); - assert(page); - - page->allocator = _root->allocator; - - return page; - } - - static void deallocate_page(xml_memory_page* page) - { - xml_memory::deallocate(page); - } - - void* allocate_memory_oob(size_t size, xml_memory_page*& out_page); - - void* allocate_memory(size_t size, xml_memory_page*& out_page) - { - if (PUGI__UNLIKELY(_busy_size + size > xml_memory_page_size)) - return allocate_memory_oob(size, out_page); - - void* buf = reinterpret_cast<char*>(_root) + sizeof(xml_memory_page) + _busy_size; - - _busy_size += size; - - out_page = _root; - - return buf; - } - - #ifdef PUGIXML_COMPACT - void* allocate_object(size_t size, xml_memory_page*& out_page) - { - void* result = allocate_memory(size + sizeof(uint32_t), out_page); - if (!result) return 0; - - // adjust for marker - ptrdiff_t offset = static_cast<char*>(result) - reinterpret_cast<char*>(out_page->compact_page_marker); - - if (PUGI__UNLIKELY(static_cast<uintptr_t>(offset) >= 256 * xml_memory_block_alignment)) - { - // insert new marker - uint32_t* marker = static_cast<uint32_t*>(result); - - *marker = static_cast<uint32_t>(reinterpret_cast<char*>(marker) - reinterpret_cast<char*>(out_page)); - out_page->compact_page_marker = marker; - - // since we don't reuse the page space until we reallocate it, we can just pretend that we freed the marker block - // this will make sure deallocate_memory correctly tracks the size - out_page->freed_size += sizeof(uint32_t); - - return marker + 1; - } - else - { - // roll back uint32_t part - _busy_size -= sizeof(uint32_t); - - return result; - } - } - #else - void* allocate_object(size_t size, xml_memory_page*& out_page) - { - return allocate_memory(size, out_page); - } - #endif - - void deallocate_memory(void* ptr, size_t size, xml_memory_page* page) - { - if (page == _root) page->busy_size = _busy_size; - - assert(ptr >= reinterpret_cast<char*>(page) + sizeof(xml_memory_page) && ptr < reinterpret_cast<char*>(page) + sizeof(xml_memory_page) + page->busy_size); - (void)!ptr; - - page->freed_size += size; - assert(page->freed_size <= page->busy_size); - - if (page->freed_size == page->busy_size) - { - if (page->next == 0) - { - assert(_root == page); - - // top page freed, just reset sizes - page->busy_size = 0; - page->freed_size = 0; - - #ifdef PUGIXML_COMPACT - // reset compact state to maximize efficiency - page->compact_string_base = 0; - page->compact_shared_parent = 0; - page->compact_page_marker = 0; - #endif - - _busy_size = 0; - } - else - { - assert(_root != page); - assert(page->prev); - - // remove from the list - page->prev->next = page->next; - page->next->prev = page->prev; - - // deallocate - deallocate_page(page); - } - } - } - - char_t* allocate_string(size_t length) - { - static const size_t max_encoded_offset = (1 << 16) * xml_memory_block_alignment; - - PUGI__STATIC_ASSERT(xml_memory_page_size <= max_encoded_offset); - - // allocate memory for string and header block - size_t size = sizeof(xml_memory_string_header) + length * sizeof(char_t); - - // round size up to block alignment boundary - size_t full_size = (size + (xml_memory_block_alignment - 1)) & ~(xml_memory_block_alignment - 1); - - xml_memory_page* page; - xml_memory_string_header* header = static_cast<xml_memory_string_header*>(allocate_memory(full_size, page)); - - if (!header) return 0; - - // setup header - ptrdiff_t page_offset = reinterpret_cast<char*>(header) - reinterpret_cast<char*>(page) - sizeof(xml_memory_page); - - assert(page_offset % xml_memory_block_alignment == 0); - assert(page_offset >= 0 && static_cast<size_t>(page_offset) < max_encoded_offset); - header->page_offset = static_cast<uint16_t>(static_cast<size_t>(page_offset) / xml_memory_block_alignment); - - // full_size == 0 for large strings that occupy the whole page - assert(full_size % xml_memory_block_alignment == 0); - assert(full_size < max_encoded_offset || (page->busy_size == full_size && page_offset == 0)); - header->full_size = static_cast<uint16_t>(full_size < max_encoded_offset ? full_size / xml_memory_block_alignment : 0); - - // round-trip through void* to avoid 'cast increases required alignment of target type' warning - // header is guaranteed a pointer-sized alignment, which should be enough for char_t - return static_cast<char_t*>(static_cast<void*>(header + 1)); - } - - void deallocate_string(char_t* string) - { - // this function casts pointers through void* to avoid 'cast increases required alignment of target type' warnings - // we're guaranteed the proper (pointer-sized) alignment on the input string if it was allocated via allocate_string - - // get header - xml_memory_string_header* header = static_cast<xml_memory_string_header*>(static_cast<void*>(string)) - 1; - assert(header); - - // deallocate - size_t page_offset = sizeof(xml_memory_page) + header->page_offset * xml_memory_block_alignment; - xml_memory_page* page = reinterpret_cast<xml_memory_page*>(static_cast<void*>(reinterpret_cast<char*>(header) - page_offset)); - - // if full_size == 0 then this string occupies the whole page - size_t full_size = header->full_size == 0 ? page->busy_size : header->full_size * xml_memory_block_alignment; - - deallocate_memory(header, full_size, page); - } - - bool reserve() - { - #ifdef PUGIXML_COMPACT - return _hash->reserve(); - #else - return true; - #endif - } - - xml_memory_page* _root; - size_t _busy_size; - - #ifdef PUGIXML_COMPACT - compact_hash_table* _hash; - #endif - }; - - PUGI__FN_NO_INLINE void* xml_allocator::allocate_memory_oob(size_t size, xml_memory_page*& out_page) - { - const size_t large_allocation_threshold = xml_memory_page_size / 4; - - xml_memory_page* page = allocate_page(size <= large_allocation_threshold ? xml_memory_page_size : size); - out_page = page; - - if (!page) return 0; - - if (size <= large_allocation_threshold) - { - _root->busy_size = _busy_size; - - // insert page at the end of linked list - page->prev = _root; - _root->next = page; - _root = page; - - _busy_size = size; - } - else - { - // insert page before the end of linked list, so that it is deleted as soon as possible - // the last page is not deleted even if it's empty (see deallocate_memory) - assert(_root->prev); - - page->prev = _root->prev; - page->next = _root; - - _root->prev->next = page; - _root->prev = page; - - page->busy_size = size; - } - - return reinterpret_cast<char*>(page) + sizeof(xml_memory_page); - } -PUGI__NS_END - -#ifdef PUGIXML_COMPACT -PUGI__NS_BEGIN - static const uintptr_t compact_alignment_log2 = 2; - static const uintptr_t compact_alignment = 1 << compact_alignment_log2; - - class compact_header - { - public: - compact_header(xml_memory_page* page, unsigned int flags) - { - PUGI__STATIC_ASSERT(xml_memory_block_alignment == compact_alignment); - - ptrdiff_t offset = (reinterpret_cast<char*>(this) - reinterpret_cast<char*>(page->compact_page_marker)); - assert(offset % compact_alignment == 0 && static_cast<uintptr_t>(offset) < 256 * compact_alignment); - - _page = static_cast<unsigned char>(offset >> compact_alignment_log2); - _flags = static_cast<unsigned char>(flags); - } - - void operator&=(uintptr_t mod) - { - _flags &= static_cast<unsigned char>(mod); - } - - void operator|=(uintptr_t mod) - { - _flags |= static_cast<unsigned char>(mod); - } - - uintptr_t operator&(uintptr_t mod) const - { - return _flags & mod; - } - - xml_memory_page* get_page() const - { - // round-trip through void* to silence 'cast increases required alignment of target type' warnings - const char* page_marker = reinterpret_cast<const char*>(this) - (_page << compact_alignment_log2); - const char* page = page_marker - *reinterpret_cast<const uint32_t*>(static_cast<const void*>(page_marker)); - - return const_cast<xml_memory_page*>(reinterpret_cast<const xml_memory_page*>(static_cast<const void*>(page))); - } - - private: - unsigned char _page; - unsigned char _flags; - }; - - PUGI__FN xml_memory_page* compact_get_page(const void* object, int header_offset) - { - const compact_header* header = reinterpret_cast<const compact_header*>(static_cast<const char*>(object) - header_offset); - - return header->get_page(); - } - - template <int header_offset, typename T> PUGI__FN_NO_INLINE T* compact_get_value(const void* object) - { - return static_cast<T*>(compact_get_page(object, header_offset)->allocator->_hash->find(object)); - } - - template <int header_offset, typename T> PUGI__FN_NO_INLINE void compact_set_value(const void* object, T* value) - { - compact_get_page(object, header_offset)->allocator->_hash->insert(object, value); - } - - template <typename T, int header_offset, int start = -126> class compact_pointer - { - public: - compact_pointer(): _data(0) - { - } - - void operator=(const compact_pointer& rhs) - { - *this = rhs + 0; - } - - void operator=(T* value) - { - if (value) - { - // value is guaranteed to be compact-aligned; 'this' is not - // our decoding is based on 'this' aligned to compact alignment downwards (see operator T*) - // so for negative offsets (e.g. -3) we need to adjust the diff by compact_alignment - 1 to - // compensate for arithmetic shift rounding for negative values - ptrdiff_t diff = reinterpret_cast<char*>(value) - reinterpret_cast<char*>(this); - ptrdiff_t offset = ((diff + int(compact_alignment - 1)) >> compact_alignment_log2) - start; - - if (static_cast<uintptr_t>(offset) <= 253) - _data = static_cast<unsigned char>(offset + 1); - else - { - compact_set_value<header_offset>(this, value); - - _data = 255; - } - } - else - _data = 0; - } - - operator T*() const - { - if (_data) - { - if (_data < 255) - { - uintptr_t base = reinterpret_cast<uintptr_t>(this) & ~(compact_alignment - 1); - - return reinterpret_cast<T*>(base + (_data - 1 + start) * compact_alignment); - } - else - return compact_get_value<header_offset, T>(this); - } - else - return 0; - } - - T* operator->() const - { - return *this; - } - - private: - unsigned char _data; - }; - - template <typename T, int header_offset> class compact_pointer_parent - { - public: - compact_pointer_parent(): _data(0) - { - } - - void operator=(const compact_pointer_parent& rhs) - { - *this = rhs + 0; - } - - void operator=(T* value) - { - if (value) - { - // value is guaranteed to be compact-aligned; 'this' is not - // our decoding is based on 'this' aligned to compact alignment downwards (see operator T*) - // so for negative offsets (e.g. -3) we need to adjust the diff by compact_alignment - 1 to - // compensate for arithmetic shift behavior for negative values - ptrdiff_t diff = reinterpret_cast<char*>(value) - reinterpret_cast<char*>(this); - ptrdiff_t offset = ((diff + int(compact_alignment - 1)) >> compact_alignment_log2) + 65533; - - if (static_cast<uintptr_t>(offset) <= 65533) - { - _data = static_cast<unsigned short>(offset + 1); - } - else - { - xml_memory_page* page = compact_get_page(this, header_offset); - - if (PUGI__UNLIKELY(page->compact_shared_parent == 0)) - page->compact_shared_parent = value; - - if (page->compact_shared_parent == value) - { - _data = 65534; - } - else - { - compact_set_value<header_offset>(this, value); - - _data = 65535; - } - } - } - else - { - _data = 0; - } - } - - operator T*() const - { - if (_data) - { - if (_data < 65534) - { - uintptr_t base = reinterpret_cast<uintptr_t>(this) & ~(compact_alignment - 1); - - return reinterpret_cast<T*>(base + (_data - 1 - 65533) * compact_alignment); - } - else if (_data == 65534) - return static_cast<T*>(compact_get_page(this, header_offset)->compact_shared_parent); - else - return compact_get_value<header_offset, T>(this); - } - else - return 0; - } - - T* operator->() const - { - return *this; - } - - private: - uint16_t _data; - }; - - template <int header_offset, int base_offset> class compact_string - { - public: - compact_string(): _data(0) - { - } - - void operator=(const compact_string& rhs) - { - *this = rhs + 0; - } - - void operator=(char_t* value) - { - if (value) - { - xml_memory_page* page = compact_get_page(this, header_offset); - - if (PUGI__UNLIKELY(page->compact_string_base == 0)) - page->compact_string_base = value; - - ptrdiff_t offset = value - page->compact_string_base; - - if (static_cast<uintptr_t>(offset) < (65535 << 7)) - { - // round-trip through void* to silence 'cast increases required alignment of target type' warnings - uint16_t* base = reinterpret_cast<uint16_t*>(static_cast<void*>(reinterpret_cast<char*>(this) - base_offset)); - - if (*base == 0) - { - *base = static_cast<uint16_t>((offset >> 7) + 1); - _data = static_cast<unsigned char>((offset & 127) + 1); - } - else - { - ptrdiff_t remainder = offset - ((*base - 1) << 7); - - if (static_cast<uintptr_t>(remainder) <= 253) - { - _data = static_cast<unsigned char>(remainder + 1); - } - else - { - compact_set_value<header_offset>(this, value); - - _data = 255; - } - } - } - else - { - compact_set_value<header_offset>(this, value); - - _data = 255; - } - } - else - { - _data = 0; - } - } - - operator char_t*() const - { - if (_data) - { - if (_data < 255) - { - xml_memory_page* page = compact_get_page(this, header_offset); - - // round-trip through void* to silence 'cast increases required alignment of target type' warnings - const uint16_t* base = reinterpret_cast<const uint16_t*>(static_cast<const void*>(reinterpret_cast<const char*>(this) - base_offset)); - assert(*base); - - ptrdiff_t offset = ((*base - 1) << 7) + (_data - 1); - - return page->compact_string_base + offset; - } - else - { - return compact_get_value<header_offset, char_t>(this); - } - } - else - return 0; - } - - private: - unsigned char _data; - }; -PUGI__NS_END -#endif - -#ifdef PUGIXML_COMPACT -namespace pugi -{ - struct xml_attribute_struct - { - xml_attribute_struct(impl::xml_memory_page* page): header(page, 0), namevalue_base(0) - { - PUGI__STATIC_ASSERT(sizeof(xml_attribute_struct) == 8); - } - - impl::compact_header header; - - uint16_t namevalue_base; - - impl::compact_string<4, 2> name; - impl::compact_string<5, 3> value; - - impl::compact_pointer<xml_attribute_struct, 6> prev_attribute_c; - impl::compact_pointer<xml_attribute_struct, 7, 0> next_attribute; - }; - - struct xml_node_struct - { - xml_node_struct(impl::xml_memory_page* page, xml_node_type type): header(page, type), namevalue_base(0) - { - PUGI__STATIC_ASSERT(sizeof(xml_node_struct) == 12); - } - - impl::compact_header header; - - uint16_t namevalue_base; - - impl::compact_string<4, 2> name; - impl::compact_string<5, 3> value; - - impl::compact_pointer_parent<xml_node_struct, 6> parent; - - impl::compact_pointer<xml_node_struct, 8, 0> first_child; - - impl::compact_pointer<xml_node_struct, 9> prev_sibling_c; - impl::compact_pointer<xml_node_struct, 10, 0> next_sibling; - - impl::compact_pointer<xml_attribute_struct, 11, 0> first_attribute; - }; -} -#else -namespace pugi -{ - struct xml_attribute_struct - { - xml_attribute_struct(impl::xml_memory_page* page): name(0), value(0), prev_attribute_c(0), next_attribute(0) - { - header = PUGI__GETHEADER_IMPL(this, page, 0); - } - - uintptr_t header; - - char_t* name; - char_t* value; - - xml_attribute_struct* prev_attribute_c; - xml_attribute_struct* next_attribute; - }; - - struct xml_node_struct - { - xml_node_struct(impl::xml_memory_page* page, xml_node_type type): name(0), value(0), parent(0), first_child(0), prev_sibling_c(0), next_sibling(0), first_attribute(0) - { - header = PUGI__GETHEADER_IMPL(this, page, type); - } - - uintptr_t header; - - char_t* name; - char_t* value; - - xml_node_struct* parent; - - xml_node_struct* first_child; - - xml_node_struct* prev_sibling_c; - xml_node_struct* next_sibling; - - xml_attribute_struct* first_attribute; - }; -} -#endif - -PUGI__NS_BEGIN - struct xml_extra_buffer - { - char_t* buffer; - xml_extra_buffer* next; - }; - - struct xml_document_struct: public xml_node_struct, public xml_allocator - { - xml_document_struct(xml_memory_page* page): xml_node_struct(page, node_document), xml_allocator(page), buffer(0), extra_buffers(0) - { - } - - const char_t* buffer; - - xml_extra_buffer* extra_buffers; - - #ifdef PUGIXML_COMPACT - compact_hash_table hash; - #endif - }; - - template <typename Object> inline xml_allocator& get_allocator(const Object* object) - { - assert(object); - - return *PUGI__GETPAGE(object)->allocator; - } - - template <typename Object> inline xml_document_struct& get_document(const Object* object) - { - assert(object); - - return *static_cast<xml_document_struct*>(PUGI__GETPAGE(object)->allocator); - } -PUGI__NS_END - -// Low-level DOM operations -PUGI__NS_BEGIN - inline xml_attribute_struct* allocate_attribute(xml_allocator& alloc) - { - xml_memory_page* page; - void* memory = alloc.allocate_object(sizeof(xml_attribute_struct), page); - if (!memory) return 0; - - return new (memory) xml_attribute_struct(page); - } - - inline xml_node_struct* allocate_node(xml_allocator& alloc, xml_node_type type) - { - xml_memory_page* page; - void* memory = alloc.allocate_object(sizeof(xml_node_struct), page); - if (!memory) return 0; - - return new (memory) xml_node_struct(page, type); - } - - inline void destroy_attribute(xml_attribute_struct* a, xml_allocator& alloc) - { - if (a->header & impl::xml_memory_page_name_allocated_mask) - alloc.deallocate_string(a->name); - - if (a->header & impl::xml_memory_page_value_allocated_mask) - alloc.deallocate_string(a->value); - - alloc.deallocate_memory(a, sizeof(xml_attribute_struct), PUGI__GETPAGE(a)); - } - - inline void destroy_node(xml_node_struct* n, xml_allocator& alloc) - { - if (n->header & impl::xml_memory_page_name_allocated_mask) - alloc.deallocate_string(n->name); - - if (n->header & impl::xml_memory_page_value_allocated_mask) - alloc.deallocate_string(n->value); - - for (xml_attribute_struct* attr = n->first_attribute; attr; ) - { - xml_attribute_struct* next = attr->next_attribute; - - destroy_attribute(attr, alloc); - - attr = next; - } - - for (xml_node_struct* child = n->first_child; child; ) - { - xml_node_struct* next = child->next_sibling; - - destroy_node(child, alloc); - - child = next; - } - - alloc.deallocate_memory(n, sizeof(xml_node_struct), PUGI__GETPAGE(n)); - } - - inline void append_node(xml_node_struct* child, xml_node_struct* node) - { - child->parent = node; - - xml_node_struct* head = node->first_child; - - if (head) - { - xml_node_struct* tail = head->prev_sibling_c; - - tail->next_sibling = child; - child->prev_sibling_c = tail; - head->prev_sibling_c = child; - } - else - { - node->first_child = child; - child->prev_sibling_c = child; - } - } - - inline void prepend_node(xml_node_struct* child, xml_node_struct* node) - { - child->parent = node; - - xml_node_struct* head = node->first_child; - - if (head) - { - child->prev_sibling_c = head->prev_sibling_c; - head->prev_sibling_c = child; - } - else - child->prev_sibling_c = child; - - child->next_sibling = head; - node->first_child = child; - } - - inline void insert_node_after(xml_node_struct* child, xml_node_struct* node) - { - xml_node_struct* parent = node->parent; - - child->parent = parent; - - if (node->next_sibling) - node->next_sibling->prev_sibling_c = child; - else - parent->first_child->prev_sibling_c = child; - - child->next_sibling = node->next_sibling; - child->prev_sibling_c = node; - - node->next_sibling = child; - } - - inline void insert_node_before(xml_node_struct* child, xml_node_struct* node) - { - xml_node_struct* parent = node->parent; - - child->parent = parent; - - if (node->prev_sibling_c->next_sibling) - node->prev_sibling_c->next_sibling = child; - else - parent->first_child = child; - - child->prev_sibling_c = node->prev_sibling_c; - child->next_sibling = node; - - node->prev_sibling_c = child; - } - - inline void remove_node(xml_node_struct* node) - { - xml_node_struct* parent = node->parent; - - if (node->next_sibling) - node->next_sibling->prev_sibling_c = node->prev_sibling_c; - else - parent->first_child->prev_sibling_c = node->prev_sibling_c; - - if (node->prev_sibling_c->next_sibling) - node->prev_sibling_c->next_sibling = node->next_sibling; - else - parent->first_child = node->next_sibling; - - node->parent = 0; - node->prev_sibling_c = 0; - node->next_sibling = 0; - } - - inline void append_attribute(xml_attribute_struct* attr, xml_node_struct* node) - { - xml_attribute_struct* head = node->first_attribute; - - if (head) - { - xml_attribute_struct* tail = head->prev_attribute_c; - - tail->next_attribute = attr; - attr->prev_attribute_c = tail; - head->prev_attribute_c = attr; - } - else - { - node->first_attribute = attr; - attr->prev_attribute_c = attr; - } - } - - inline void prepend_attribute(xml_attribute_struct* attr, xml_node_struct* node) - { - xml_attribute_struct* head = node->first_attribute; - - if (head) - { - attr->prev_attribute_c = head->prev_attribute_c; - head->prev_attribute_c = attr; - } - else - attr->prev_attribute_c = attr; - - attr->next_attribute = head; - node->first_attribute = attr; - } - - inline void insert_attribute_after(xml_attribute_struct* attr, xml_attribute_struct* place, xml_node_struct* node) - { - if (place->next_attribute) - place->next_attribute->prev_attribute_c = attr; - else - node->first_attribute->prev_attribute_c = attr; - - attr->next_attribute = place->next_attribute; - attr->prev_attribute_c = place; - place->next_attribute = attr; - } - - inline void insert_attribute_before(xml_attribute_struct* attr, xml_attribute_struct* place, xml_node_struct* node) - { - if (place->prev_attribute_c->next_attribute) - place->prev_attribute_c->next_attribute = attr; - else - node->first_attribute = attr; - - attr->prev_attribute_c = place->prev_attribute_c; - attr->next_attribute = place; - place->prev_attribute_c = attr; - } - - inline void remove_attribute(xml_attribute_struct* attr, xml_node_struct* node) - { - if (attr->next_attribute) - attr->next_attribute->prev_attribute_c = attr->prev_attribute_c; - else - node->first_attribute->prev_attribute_c = attr->prev_attribute_c; - - if (attr->prev_attribute_c->next_attribute) - attr->prev_attribute_c->next_attribute = attr->next_attribute; - else - node->first_attribute = attr->next_attribute; - - attr->prev_attribute_c = 0; - attr->next_attribute = 0; - } - - PUGI__FN_NO_INLINE xml_node_struct* append_new_node(xml_node_struct* node, xml_allocator& alloc, xml_node_type type = node_element) - { - if (!alloc.reserve()) return 0; - - xml_node_struct* child = allocate_node(alloc, type); - if (!child) return 0; - - append_node(child, node); - - return child; - } - - PUGI__FN_NO_INLINE xml_attribute_struct* append_new_attribute(xml_node_struct* node, xml_allocator& alloc) - { - if (!alloc.reserve()) return 0; - - xml_attribute_struct* attr = allocate_attribute(alloc); - if (!attr) return 0; - - append_attribute(attr, node); - - return attr; - } -PUGI__NS_END - -// Helper classes for code generation -PUGI__NS_BEGIN - struct opt_false - { - enum { value = 0 }; - }; - - struct opt_true - { - enum { value = 1 }; - }; -PUGI__NS_END - -// Unicode utilities -PUGI__NS_BEGIN - inline uint16_t endian_swap(uint16_t value) - { - return static_cast<uint16_t>(((value & 0xff) << 8) | (value >> 8)); - } - - inline uint32_t endian_swap(uint32_t value) - { - return ((value & 0xff) << 24) | ((value & 0xff00) << 8) | ((value & 0xff0000) >> 8) | (value >> 24); - } - - struct utf8_counter - { - typedef size_t value_type; - - static value_type low(value_type result, uint32_t ch) - { - // U+0000..U+007F - if (ch < 0x80) return result + 1; - // U+0080..U+07FF - else if (ch < 0x800) return result + 2; - // U+0800..U+FFFF - else return result + 3; - } - - static value_type high(value_type result, uint32_t) - { - // U+10000..U+10FFFF - return result + 4; - } - }; - - struct utf8_writer - { - typedef uint8_t* value_type; - - static value_type low(value_type result, uint32_t ch) - { - // U+0000..U+007F - if (ch < 0x80) - { - *result = static_cast<uint8_t>(ch); - return result + 1; - } - // U+0080..U+07FF - else if (ch < 0x800) - { - result[0] = static_cast<uint8_t>(0xC0 | (ch >> 6)); - result[1] = static_cast<uint8_t>(0x80 | (ch & 0x3F)); - return result + 2; - } - // U+0800..U+FFFF - else - { - result[0] = static_cast<uint8_t>(0xE0 | (ch >> 12)); - result[1] = static_cast<uint8_t>(0x80 | ((ch >> 6) & 0x3F)); - result[2] = static_cast<uint8_t>(0x80 | (ch & 0x3F)); - return result + 3; - } - } - - static value_type high(value_type result, uint32_t ch) - { - // U+10000..U+10FFFF - result[0] = static_cast<uint8_t>(0xF0 | (ch >> 18)); - result[1] = static_cast<uint8_t>(0x80 | ((ch >> 12) & 0x3F)); - result[2] = static_cast<uint8_t>(0x80 | ((ch >> 6) & 0x3F)); - result[3] = static_cast<uint8_t>(0x80 | (ch & 0x3F)); - return result + 4; - } - - static value_type any(value_type result, uint32_t ch) - { - return (ch < 0x10000) ? low(result, ch) : high(result, ch); - } - }; - - struct utf16_counter - { - typedef size_t value_type; - - static value_type low(value_type result, uint32_t) - { - return result + 1; - } - - static value_type high(value_type result, uint32_t) - { - return result + 2; - } - }; - - struct utf16_writer - { - typedef uint16_t* value_type; - - static value_type low(value_type result, uint32_t ch) - { - *result = static_cast<uint16_t>(ch); - - return result + 1; - } - - static value_type high(value_type result, uint32_t ch) - { - uint32_t msh = static_cast<uint32_t>(ch - 0x10000) >> 10; - uint32_t lsh = static_cast<uint32_t>(ch - 0x10000) & 0x3ff; - - result[0] = static_cast<uint16_t>(0xD800 + msh); - result[1] = static_cast<uint16_t>(0xDC00 + lsh); - - return result + 2; - } - - static value_type any(value_type result, uint32_t ch) - { - return (ch < 0x10000) ? low(result, ch) : high(result, ch); - } - }; - - struct utf32_counter - { - typedef size_t value_type; - - static value_type low(value_type result, uint32_t) - { - return result + 1; - } - - static value_type high(value_type result, uint32_t) - { - return result + 1; - } - }; - - struct utf32_writer - { - typedef uint32_t* value_type; - - static value_type low(value_type result, uint32_t ch) - { - *result = ch; - - return result + 1; - } - - static value_type high(value_type result, uint32_t ch) - { - *result = ch; - - return result + 1; - } - - static value_type any(value_type result, uint32_t ch) - { - *result = ch; - - return result + 1; - } - }; - - struct latin1_writer - { - typedef uint8_t* value_type; - - static value_type low(value_type result, uint32_t ch) - { - *result = static_cast<uint8_t>(ch > 255 ? '?' : ch); - - return result + 1; - } - - static value_type high(value_type result, uint32_t ch) - { - (void)ch; - - *result = '?'; - - return result + 1; - } - }; - - struct utf8_decoder - { - typedef uint8_t type; - - template <typename Traits> static inline typename Traits::value_type process(const uint8_t* data, size_t size, typename Traits::value_type result, Traits) - { - const uint8_t utf8_byte_mask = 0x3f; - - while (size) - { - uint8_t lead = *data; - - // 0xxxxxxx -> U+0000..U+007F - if (lead < 0x80) - { - result = Traits::low(result, lead); - data += 1; - size -= 1; - - // process aligned single-byte (ascii) blocks - if ((reinterpret_cast<uintptr_t>(data) & 3) == 0) - { - // round-trip through void* to silence 'cast increases required alignment of target type' warnings - while (size >= 4 && (*static_cast<const uint32_t*>(static_cast<const void*>(data)) & 0x80808080) == 0) - { - result = Traits::low(result, data[0]); - result = Traits::low(result, data[1]); - result = Traits::low(result, data[2]); - result = Traits::low(result, data[3]); - data += 4; - size -= 4; - } - } - } - // 110xxxxx -> U+0080..U+07FF - else if (static_cast<unsigned int>(lead - 0xC0) < 0x20 && size >= 2 && (data[1] & 0xc0) == 0x80) - { - result = Traits::low(result, ((lead & ~0xC0) << 6) | (data[1] & utf8_byte_mask)); - data += 2; - size -= 2; - } - // 1110xxxx -> U+0800-U+FFFF - else if (static_cast<unsigned int>(lead - 0xE0) < 0x10 && size >= 3 && (data[1] & 0xc0) == 0x80 && (data[2] & 0xc0) == 0x80) - { - result = Traits::low(result, ((lead & ~0xE0) << 12) | ((data[1] & utf8_byte_mask) << 6) | (data[2] & utf8_byte_mask)); - data += 3; - size -= 3; - } - // 11110xxx -> U+10000..U+10FFFF - else if (static_cast<unsigned int>(lead - 0xF0) < 0x08 && size >= 4 && (data[1] & 0xc0) == 0x80 && (data[2] & 0xc0) == 0x80 && (data[3] & 0xc0) == 0x80) - { - result = Traits::high(result, ((lead & ~0xF0) << 18) | ((data[1] & utf8_byte_mask) << 12) | ((data[2] & utf8_byte_mask) << 6) | (data[3] & utf8_byte_mask)); - data += 4; - size -= 4; - } - // 10xxxxxx or 11111xxx -> invalid - else - { - data += 1; - size -= 1; - } - } - - return result; - } - }; - - template <typename opt_swap> struct utf16_decoder - { - typedef uint16_t type; - - template <typename Traits> static inline typename Traits::value_type process(const uint16_t* data, size_t size, typename Traits::value_type result, Traits) - { - while (size) - { - uint16_t lead = opt_swap::value ? endian_swap(*data) : *data; - - // U+0000..U+D7FF - if (lead < 0xD800) - { - result = Traits::low(result, lead); - data += 1; - size -= 1; - } - // U+E000..U+FFFF - else if (static_cast<unsigned int>(lead - 0xE000) < 0x2000) - { - result = Traits::low(result, lead); - data += 1; - size -= 1; - } - // surrogate pair lead - else if (static_cast<unsigned int>(lead - 0xD800) < 0x400 && size >= 2) - { - uint16_t next = opt_swap::value ? endian_swap(data[1]) : data[1]; - - if (static_cast<unsigned int>(next - 0xDC00) < 0x400) - { - result = Traits::high(result, 0x10000 + ((lead & 0x3ff) << 10) + (next & 0x3ff)); - data += 2; - size -= 2; - } - else - { - data += 1; - size -= 1; - } - } - else - { - data += 1; - size -= 1; - } - } - - return result; - } - }; - - template <typename opt_swap> struct utf32_decoder - { - typedef uint32_t type; - - template <typename Traits> static inline typename Traits::value_type process(const uint32_t* data, size_t size, typename Traits::value_type result, Traits) - { - while (size) - { - uint32_t lead = opt_swap::value ? endian_swap(*data) : *data; - - // U+0000..U+FFFF - if (lead < 0x10000) - { - result = Traits::low(result, lead); - data += 1; - size -= 1; - } - // U+10000..U+10FFFF - else - { - result = Traits::high(result, lead); - data += 1; - size -= 1; - } - } - - return result; - } - }; - - struct latin1_decoder - { - typedef uint8_t type; - - template <typename Traits> static inline typename Traits::value_type process(const uint8_t* data, size_t size, typename Traits::value_type result, Traits) - { - while (size) - { - result = Traits::low(result, *data); - data += 1; - size -= 1; - } - - return result; - } - }; - - template <size_t size> struct wchar_selector; - - template <> struct wchar_selector<2> - { - typedef uint16_t type; - typedef utf16_counter counter; - typedef utf16_writer writer; - typedef utf16_decoder<opt_false> decoder; - }; - - template <> struct wchar_selector<4> - { - typedef uint32_t type; - typedef utf32_counter counter; - typedef utf32_writer writer; - typedef utf32_decoder<opt_false> decoder; - }; - - typedef wchar_selector<sizeof(wchar_t)>::counter wchar_counter; - typedef wchar_selector<sizeof(wchar_t)>::writer wchar_writer; - - struct wchar_decoder - { - typedef wchar_t type; - - template <typename Traits> static inline typename Traits::value_type process(const wchar_t* data, size_t size, typename Traits::value_type result, Traits traits) - { - typedef wchar_selector<sizeof(wchar_t)>::decoder decoder; - - return decoder::process(reinterpret_cast<const typename decoder::type*>(data), size, result, traits); - } - }; - -#ifdef PUGIXML_WCHAR_MODE - PUGI__FN void convert_wchar_endian_swap(wchar_t* result, const wchar_t* data, size_t length) - { - for (size_t i = 0; i < length; ++i) - result[i] = static_cast<wchar_t>(endian_swap(static_cast<wchar_selector<sizeof(wchar_t)>::type>(data[i]))); - } -#endif -PUGI__NS_END - -PUGI__NS_BEGIN - enum chartype_t - { - ct_parse_pcdata = 1, // \0, &, \r, < - ct_parse_attr = 2, // \0, &, \r, ', " - ct_parse_attr_ws = 4, // \0, &, \r, ', ", \n, tab - ct_space = 8, // \r, \n, space, tab - ct_parse_cdata = 16, // \0, ], >, \r - ct_parse_comment = 32, // \0, -, >, \r - ct_symbol = 64, // Any symbol > 127, a-z, A-Z, 0-9, _, :, -, . - ct_start_symbol = 128 // Any symbol > 127, a-z, A-Z, _, : - }; - - static const unsigned char chartype_table[256] = - { - 55, 0, 0, 0, 0, 0, 0, 0, 0, 12, 12, 0, 0, 63, 0, 0, // 0-15 - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16-31 - 8, 0, 6, 0, 0, 0, 7, 6, 0, 0, 0, 0, 0, 96, 64, 0, // 32-47 - 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 192, 0, 1, 0, 48, 0, // 48-63 - 0, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, // 64-79 - 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 0, 0, 16, 0, 192, // 80-95 - 0, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, // 96-111 - 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 0, 0, 0, 0, 0, // 112-127 - - 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, // 128+ - 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, - 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, - 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, - 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, - 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, - 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, - 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192 - }; - - enum chartypex_t - { - ctx_special_pcdata = 1, // Any symbol >= 0 and < 32 (except \t, \r, \n), &, <, > - ctx_special_attr = 2, // Any symbol >= 0 and < 32, &, <, ", ' - ctx_start_symbol = 4, // Any symbol > 127, a-z, A-Z, _ - ctx_digit = 8, // 0-9 - ctx_symbol = 16 // Any symbol > 127, a-z, A-Z, 0-9, _, -, . - }; - - static const unsigned char chartypex_table[256] = - { - 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 3, 3, 2, 3, 3, // 0-15 - 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, // 16-31 - 0, 0, 2, 0, 0, 0, 3, 2, 0, 0, 0, 0, 0, 16, 16, 0, // 32-47 - 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 0, 0, 3, 0, 1, 0, // 48-63 - - 0, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, // 64-79 - 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 0, 0, 0, 0, 20, // 80-95 - 0, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, // 96-111 - 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 0, 0, 0, 0, 0, // 112-127 - - 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, // 128+ - 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, - 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, - 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, - 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, - 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, - 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, - 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20 - }; - -#ifdef PUGIXML_WCHAR_MODE - #define PUGI__IS_CHARTYPE_IMPL(c, ct, table) ((static_cast<unsigned int>(c) < 128 ? table[static_cast<unsigned int>(c)] : table[128]) & (ct)) -#else - #define PUGI__IS_CHARTYPE_IMPL(c, ct, table) (table[static_cast<unsigned char>(c)] & (ct)) -#endif - - #define PUGI__IS_CHARTYPE(c, ct) PUGI__IS_CHARTYPE_IMPL(c, ct, chartype_table) - #define PUGI__IS_CHARTYPEX(c, ct) PUGI__IS_CHARTYPE_IMPL(c, ct, chartypex_table) - - PUGI__FN bool is_little_endian() - { - unsigned int ui = 1; - - return *reinterpret_cast<unsigned char*>(&ui) == 1; - } - - PUGI__FN xml_encoding get_wchar_encoding() - { - PUGI__STATIC_ASSERT(sizeof(wchar_t) == 2 || sizeof(wchar_t) == 4); - - if (sizeof(wchar_t) == 2) - return is_little_endian() ? encoding_utf16_le : encoding_utf16_be; - else - return is_little_endian() ? encoding_utf32_le : encoding_utf32_be; - } - - PUGI__FN bool parse_declaration_encoding(const uint8_t* data, size_t size, const uint8_t*& out_encoding, size_t& out_length) - { - #define PUGI__SCANCHAR(ch) { if (offset >= size || data[offset] != ch) return false; offset++; } - #define PUGI__SCANCHARTYPE(ct) { while (offset < size && PUGI__IS_CHARTYPE(data[offset], ct)) offset++; } - - // check if we have a non-empty XML declaration - if (size < 6 || !((data[0] == '<') & (data[1] == '?') & (data[2] == 'x') & (data[3] == 'm') & (data[4] == 'l') && PUGI__IS_CHARTYPE(data[5], ct_space))) - return false; - - // scan XML declaration until the encoding field - for (size_t i = 6; i + 1 < size; ++i) - { - // declaration can not contain ? in quoted values - if (data[i] == '?') - return false; - - if (data[i] == 'e' && data[i + 1] == 'n') - { - size_t offset = i; - - // encoding follows the version field which can't contain 'en' so this has to be the encoding if XML is well formed - PUGI__SCANCHAR('e'); PUGI__SCANCHAR('n'); PUGI__SCANCHAR('c'); PUGI__SCANCHAR('o'); - PUGI__SCANCHAR('d'); PUGI__SCANCHAR('i'); PUGI__SCANCHAR('n'); PUGI__SCANCHAR('g'); - - // S? = S? - PUGI__SCANCHARTYPE(ct_space); - PUGI__SCANCHAR('='); - PUGI__SCANCHARTYPE(ct_space); - - // the only two valid delimiters are ' and " - uint8_t delimiter = (offset < size && data[offset] == '"') ? '"' : '\''; - - PUGI__SCANCHAR(delimiter); - - size_t start = offset; - - out_encoding = data + offset; - - PUGI__SCANCHARTYPE(ct_symbol); - - out_length = offset - start; - - PUGI__SCANCHAR(delimiter); - - return true; - } - } - - return false; - - #undef PUGI__SCANCHAR - #undef PUGI__SCANCHARTYPE - } - - PUGI__FN xml_encoding guess_buffer_encoding(const uint8_t* data, size_t size) - { - // skip encoding autodetection if input buffer is too small - if (size < 4) return encoding_utf8; - - uint8_t d0 = data[0], d1 = data[1], d2 = data[2], d3 = data[3]; - - // look for BOM in first few bytes - if (d0 == 0 && d1 == 0 && d2 == 0xfe && d3 == 0xff) return encoding_utf32_be; - if (d0 == 0xff && d1 == 0xfe && d2 == 0 && d3 == 0) return encoding_utf32_le; - if (d0 == 0xfe && d1 == 0xff) return encoding_utf16_be; - if (d0 == 0xff && d1 == 0xfe) return encoding_utf16_le; - if (d0 == 0xef && d1 == 0xbb && d2 == 0xbf) return encoding_utf8; - - // look for <, <? or <?xm in various encodings - if (d0 == 0 && d1 == 0 && d2 == 0 && d3 == 0x3c) return encoding_utf32_be; - if (d0 == 0x3c && d1 == 0 && d2 == 0 && d3 == 0) return encoding_utf32_le; - if (d0 == 0 && d1 == 0x3c && d2 == 0 && d3 == 0x3f) return encoding_utf16_be; - if (d0 == 0x3c && d1 == 0 && d2 == 0x3f && d3 == 0) return encoding_utf16_le; - - // look for utf16 < followed by node name (this may fail, but is better than utf8 since it's zero terminated so early) - if (d0 == 0 && d1 == 0x3c) return encoding_utf16_be; - if (d0 == 0x3c && d1 == 0) return encoding_utf16_le; - - // no known BOM detected; parse declaration - const uint8_t* enc = 0; - size_t enc_length = 0; - - if (d0 == 0x3c && d1 == 0x3f && d2 == 0x78 && d3 == 0x6d && parse_declaration_encoding(data, size, enc, enc_length)) - { - // iso-8859-1 (case-insensitive) - if (enc_length == 10 - && (enc[0] | ' ') == 'i' && (enc[1] | ' ') == 's' && (enc[2] | ' ') == 'o' - && enc[3] == '-' && enc[4] == '8' && enc[5] == '8' && enc[6] == '5' && enc[7] == '9' - && enc[8] == '-' && enc[9] == '1') - return encoding_latin1; - - // latin1 (case-insensitive) - if (enc_length == 6 - && (enc[0] | ' ') == 'l' && (enc[1] | ' ') == 'a' && (enc[2] | ' ') == 't' - && (enc[3] | ' ') == 'i' && (enc[4] | ' ') == 'n' - && enc[5] == '1') - return encoding_latin1; - } - - return encoding_utf8; - } - - PUGI__FN xml_encoding get_buffer_encoding(xml_encoding encoding, const void* contents, size_t size) - { - // replace wchar encoding with utf implementation - if (encoding == encoding_wchar) return get_wchar_encoding(); - - // replace utf16 encoding with utf16 with specific endianness - if (encoding == encoding_utf16) return is_little_endian() ? encoding_utf16_le : encoding_utf16_be; - - // replace utf32 encoding with utf32 with specific endianness - if (encoding == encoding_utf32) return is_little_endian() ? encoding_utf32_le : encoding_utf32_be; - - // only do autodetection if no explicit encoding is requested - if (encoding != encoding_auto) return encoding; - - // try to guess encoding (based on XML specification, Appendix F.1) - const uint8_t* data = static_cast<const uint8_t*>(contents); - - return guess_buffer_encoding(data, size); - } - - PUGI__FN bool get_mutable_buffer(char_t*& out_buffer, size_t& out_length, const void* contents, size_t size, bool is_mutable) - { - size_t length = size / sizeof(char_t); - - if (is_mutable) - { - out_buffer = static_cast<char_t*>(const_cast<void*>(contents)); - out_length = length; - } - else - { - char_t* buffer = static_cast<char_t*>(xml_memory::allocate((length + 1) * sizeof(char_t))); - if (!buffer) return false; - - if (contents) - memcpy(buffer, contents, length * sizeof(char_t)); - else - assert(length == 0); - - buffer[length] = 0; - - out_buffer = buffer; - out_length = length + 1; - } - - return true; - } - -#ifdef PUGIXML_WCHAR_MODE - PUGI__FN bool need_endian_swap_utf(xml_encoding le, xml_encoding re) - { - return (le == encoding_utf16_be && re == encoding_utf16_le) || (le == encoding_utf16_le && re == encoding_utf16_be) || - (le == encoding_utf32_be && re == encoding_utf32_le) || (le == encoding_utf32_le && re == encoding_utf32_be); - } - - PUGI__FN bool convert_buffer_endian_swap(char_t*& out_buffer, size_t& out_length, const void* contents, size_t size, bool is_mutable) - { - const char_t* data = static_cast<const char_t*>(contents); - size_t length = size / sizeof(char_t); - - if (is_mutable) - { - char_t* buffer = const_cast<char_t*>(data); - - convert_wchar_endian_swap(buffer, data, length); - - out_buffer = buffer; - out_length = length; - } - else - { - char_t* buffer = static_cast<char_t*>(xml_memory::allocate((length + 1) * sizeof(char_t))); - if (!buffer) return false; - - convert_wchar_endian_swap(buffer, data, length); - buffer[length] = 0; - - out_buffer = buffer; - out_length = length + 1; - } - - return true; - } - - template <typename D> PUGI__FN bool convert_buffer_generic(char_t*& out_buffer, size_t& out_length, const void* contents, size_t size, D) - { - const typename D::type* data = static_cast<const typename D::type*>(contents); - size_t data_length = size / sizeof(typename D::type); - - // first pass: get length in wchar_t units - size_t length = D::process(data, data_length, 0, wchar_counter()); - - // allocate buffer of suitable length - char_t* buffer = static_cast<char_t*>(xml_memory::allocate((length + 1) * sizeof(char_t))); - if (!buffer) return false; - - // second pass: convert utf16 input to wchar_t - wchar_writer::value_type obegin = reinterpret_cast<wchar_writer::value_type>(buffer); - wchar_writer::value_type oend = D::process(data, data_length, obegin, wchar_writer()); - - assert(oend == obegin + length); - *oend = 0; - - out_buffer = buffer; - out_length = length + 1; - - return true; - } - - PUGI__FN bool convert_buffer(char_t*& out_buffer, size_t& out_length, xml_encoding encoding, const void* contents, size_t size, bool is_mutable) - { - // get native encoding - xml_encoding wchar_encoding = get_wchar_encoding(); - - // fast path: no conversion required - if (encoding == wchar_encoding) - return get_mutable_buffer(out_buffer, out_length, contents, size, is_mutable); - - // only endian-swapping is required - if (need_endian_swap_utf(encoding, wchar_encoding)) - return convert_buffer_endian_swap(out_buffer, out_length, contents, size, is_mutable); - - // source encoding is utf8 - if (encoding == encoding_utf8) - return convert_buffer_generic(out_buffer, out_length, contents, size, utf8_decoder()); - - // source encoding is utf16 - if (encoding == encoding_utf16_be || encoding == encoding_utf16_le) - { - xml_encoding native_encoding = is_little_endian() ? encoding_utf16_le : encoding_utf16_be; - - return (native_encoding == encoding) ? - convert_buffer_generic(out_buffer, out_length, contents, size, utf16_decoder<opt_false>()) : - convert_buffer_generic(out_buffer, out_length, contents, size, utf16_decoder<opt_true>()); - } - - // source encoding is utf32 - if (encoding == encoding_utf32_be || encoding == encoding_utf32_le) - { - xml_encoding native_encoding = is_little_endian() ? encoding_utf32_le : encoding_utf32_be; - - return (native_encoding == encoding) ? - convert_buffer_generic(out_buffer, out_length, contents, size, utf32_decoder<opt_false>()) : - convert_buffer_generic(out_buffer, out_length, contents, size, utf32_decoder<opt_true>()); - } - - // source encoding is latin1 - if (encoding == encoding_latin1) - return convert_buffer_generic(out_buffer, out_length, contents, size, latin1_decoder()); - - assert(false && "Invalid encoding"); // unreachable - return false; - } -#else - template <typename D> PUGI__FN bool convert_buffer_generic(char_t*& out_buffer, size_t& out_length, const void* contents, size_t size, D) - { - const typename D::type* data = static_cast<const typename D::type*>(contents); - size_t data_length = size / sizeof(typename D::type); - - // first pass: get length in utf8 units - size_t length = D::process(data, data_length, 0, utf8_counter()); - - // allocate buffer of suitable length - char_t* buffer = static_cast<char_t*>(xml_memory::allocate((length + 1) * sizeof(char_t))); - if (!buffer) return false; - - // second pass: convert utf16 input to utf8 - uint8_t* obegin = reinterpret_cast<uint8_t*>(buffer); - uint8_t* oend = D::process(data, data_length, obegin, utf8_writer()); - - assert(oend == obegin + length); - *oend = 0; - - out_buffer = buffer; - out_length = length + 1; - - return true; - } - - PUGI__FN size_t get_latin1_7bit_prefix_length(const uint8_t* data, size_t size) - { - for (size_t i = 0; i < size; ++i) - if (data[i] > 127) - return i; - - return size; - } - - PUGI__FN bool convert_buffer_latin1(char_t*& out_buffer, size_t& out_length, const void* contents, size_t size, bool is_mutable) - { - const uint8_t* data = static_cast<const uint8_t*>(contents); - size_t data_length = size; - - // get size of prefix that does not need utf8 conversion - size_t prefix_length = get_latin1_7bit_prefix_length(data, data_length); - assert(prefix_length <= data_length); - - const uint8_t* postfix = data + prefix_length; - size_t postfix_length = data_length - prefix_length; - - // if no conversion is needed, just return the original buffer - if (postfix_length == 0) return get_mutable_buffer(out_buffer, out_length, contents, size, is_mutable); - - // first pass: get length in utf8 units - size_t length = prefix_length + latin1_decoder::process(postfix, postfix_length, 0, utf8_counter()); - - // allocate buffer of suitable length - char_t* buffer = static_cast<char_t*>(xml_memory::allocate((length + 1) * sizeof(char_t))); - if (!buffer) return false; - - // second pass: convert latin1 input to utf8 - memcpy(buffer, data, prefix_length); - - uint8_t* obegin = reinterpret_cast<uint8_t*>(buffer); - uint8_t* oend = latin1_decoder::process(postfix, postfix_length, obegin + prefix_length, utf8_writer()); - - assert(oend == obegin + length); - *oend = 0; - - out_buffer = buffer; - out_length = length + 1; - - return true; - } - - PUGI__FN bool convert_buffer(char_t*& out_buffer, size_t& out_length, xml_encoding encoding, const void* contents, size_t size, bool is_mutable) - { - // fast path: no conversion required - if (encoding == encoding_utf8) - return get_mutable_buffer(out_buffer, out_length, contents, size, is_mutable); - - // source encoding is utf16 - if (encoding == encoding_utf16_be || encoding == encoding_utf16_le) - { - xml_encoding native_encoding = is_little_endian() ? encoding_utf16_le : encoding_utf16_be; - - return (native_encoding == encoding) ? - convert_buffer_generic(out_buffer, out_length, contents, size, utf16_decoder<opt_false>()) : - convert_buffer_generic(out_buffer, out_length, contents, size, utf16_decoder<opt_true>()); - } - - // source encoding is utf32 - if (encoding == encoding_utf32_be || encoding == encoding_utf32_le) - { - xml_encoding native_encoding = is_little_endian() ? encoding_utf32_le : encoding_utf32_be; - - return (native_encoding == encoding) ? - convert_buffer_generic(out_buffer, out_length, contents, size, utf32_decoder<opt_false>()) : - convert_buffer_generic(out_buffer, out_length, contents, size, utf32_decoder<opt_true>()); - } - - // source encoding is latin1 - if (encoding == encoding_latin1) - return convert_buffer_latin1(out_buffer, out_length, contents, size, is_mutable); - - assert(false && "Invalid encoding"); // unreachable - return false; - } -#endif - - PUGI__FN size_t as_utf8_begin(const wchar_t* str, size_t length) - { - // get length in utf8 characters - return wchar_decoder::process(str, length, 0, utf8_counter()); - } - - PUGI__FN void as_utf8_end(char* buffer, size_t size, const wchar_t* str, size_t length) - { - // convert to utf8 - uint8_t* begin = reinterpret_cast<uint8_t*>(buffer); - uint8_t* end = wchar_decoder::process(str, length, begin, utf8_writer()); - - assert(begin + size == end); - (void)!end; - (void)!size; - } - -#ifndef PUGIXML_NO_STL - PUGI__FN std::string as_utf8_impl(const wchar_t* str, size_t length) - { - // first pass: get length in utf8 characters - size_t size = as_utf8_begin(str, length); - - // allocate resulting string - std::string result; - result.resize(size); - - // second pass: convert to utf8 - if (size > 0) as_utf8_end(&result[0], size, str, length); - - return result; - } - - PUGI__FN std::basic_string<wchar_t> as_wide_impl(const char* str, size_t size) - { - const uint8_t* data = reinterpret_cast<const uint8_t*>(str); - - // first pass: get length in wchar_t units - size_t length = utf8_decoder::process(data, size, 0, wchar_counter()); - - // allocate resulting string - std::basic_string<wchar_t> result; - result.resize(length); - - // second pass: convert to wchar_t - if (length > 0) - { - wchar_writer::value_type begin = reinterpret_cast<wchar_writer::value_type>(&result[0]); - wchar_writer::value_type end = utf8_decoder::process(data, size, begin, wchar_writer()); - - assert(begin + length == end); - (void)!end; - } - - return result; - } -#endif - - template <typename Header> - inline bool strcpy_insitu_allow(size_t length, const Header& header, uintptr_t header_mask, char_t* target) - { - // never reuse shared memory - if (header & xml_memory_page_contents_shared_mask) return false; - - size_t target_length = strlength(target); - - // always reuse document buffer memory if possible - if ((header & header_mask) == 0) return target_length >= length; - - // reuse heap memory if waste is not too great - const size_t reuse_threshold = 32; - - return target_length >= length && (target_length < reuse_threshold || target_length - length < target_length / 2); - } - - template <typename String, typename Header> - PUGI__FN bool strcpy_insitu(String& dest, Header& header, uintptr_t header_mask, const char_t* source, size_t source_length) - { - if (source_length == 0) - { - // empty string and null pointer are equivalent, so just deallocate old memory - xml_allocator* alloc = PUGI__GETPAGE_IMPL(header)->allocator; - - if (header & header_mask) alloc->deallocate_string(dest); - - // mark the string as not allocated - dest = 0; - header &= ~header_mask; - - return true; - } - else if (dest && strcpy_insitu_allow(source_length, header, header_mask, dest)) - { - // we can reuse old buffer, so just copy the new data (including zero terminator) - memcpy(dest, source, source_length * sizeof(char_t)); - dest[source_length] = 0; - - return true; - } - else - { - xml_allocator* alloc = PUGI__GETPAGE_IMPL(header)->allocator; - - if (!alloc->reserve()) return false; - - // allocate new buffer - char_t* buf = alloc->allocate_string(source_length + 1); - if (!buf) return false; - - // copy the string (including zero terminator) - memcpy(buf, source, source_length * sizeof(char_t)); - buf[source_length] = 0; - - // deallocate old buffer (*after* the above to protect against overlapping memory and/or allocation failures) - if (header & header_mask) alloc->deallocate_string(dest); - - // the string is now allocated, so set the flag - dest = buf; - header |= header_mask; - - return true; - } - } - - struct gap - { - char_t* end; - size_t size; - - gap(): end(0), size(0) - { - } - - // Push new gap, move s count bytes further (skipping the gap). - // Collapse previous gap. - void push(char_t*& s, size_t count) - { - if (end) // there was a gap already; collapse it - { - // Move [old_gap_end, new_gap_start) to [old_gap_start, ...) - assert(s >= end); - memmove(end - size, end, reinterpret_cast<char*>(s) - reinterpret_cast<char*>(end)); - } - - s += count; // end of current gap - - // "merge" two gaps - end = s; - size += count; - } - - // Collapse all gaps, return past-the-end pointer - char_t* flush(char_t* s) - { - if (end) - { - // Move [old_gap_end, current_pos) to [old_gap_start, ...) - assert(s >= end); - memmove(end - size, end, reinterpret_cast<char*>(s) - reinterpret_cast<char*>(end)); - - return s - size; - } - else return s; - } - }; - - PUGI__FN char_t* strconv_escape(char_t* s, gap& g) - { - char_t* stre = s + 1; - - switch (*stre) - { - case '#': // &#... - { - unsigned int ucsc = 0; - - if (stre[1] == 'x') // &#x... (hex code) - { - stre += 2; - - char_t ch = *stre; - - if (ch == ';') return stre; - - for (;;) - { - if (static_cast<unsigned int>(ch - '0') <= 9) - ucsc = 16 * ucsc + (ch - '0'); - else if (static_cast<unsigned int>((ch | ' ') - 'a') <= 5) - ucsc = 16 * ucsc + ((ch | ' ') - 'a' + 10); - else if (ch == ';') - break; - else // cancel - return stre; - - ch = *++stre; - } - - ++stre; - } - else // &#... (dec code) - { - char_t ch = *++stre; - - if (ch == ';') return stre; - - for (;;) - { - if (static_cast<unsigned int>(ch - '0') <= 9) - ucsc = 10 * ucsc + (ch - '0'); - else if (ch == ';') - break; - else // cancel - return stre; - - ch = *++stre; - } - - ++stre; - } - - #ifdef PUGIXML_WCHAR_MODE - s = reinterpret_cast<char_t*>(wchar_writer::any(reinterpret_cast<wchar_writer::value_type>(s), ucsc)); - #else - s = reinterpret_cast<char_t*>(utf8_writer::any(reinterpret_cast<uint8_t*>(s), ucsc)); - #endif - - g.push(s, stre - s); - return stre; - } - - case 'a': // &a - { - ++stre; - - if (*stre == 'm') // &am - { - if (*++stre == 'p' && *++stre == ';') // & - { - *s++ = '&'; - ++stre; - - g.push(s, stre - s); - return stre; - } - } - else if (*stre == 'p') // &ap - { - if (*++stre == 'o' && *++stre == 's' && *++stre == ';') // ' - { - *s++ = '\''; - ++stre; - - g.push(s, stre - s); - return stre; - } - } - break; - } - - case 'g': // &g - { - if (*++stre == 't' && *++stre == ';') // > - { - *s++ = '>'; - ++stre; - - g.push(s, stre - s); - return stre; - } - break; - } - - case 'l': // &l - { - if (*++stre == 't' && *++stre == ';') // < - { - *s++ = '<'; - ++stre; - - g.push(s, stre - s); - return stre; - } - break; - } - - case 'q': // &q - { - if (*++stre == 'u' && *++stre == 'o' && *++stre == 't' && *++stre == ';') // " - { - *s++ = '"'; - ++stre; - - g.push(s, stre - s); - return stre; - } - break; - } - - default: - break; - } - - return stre; - } - - // Parser utilities - #define PUGI__ENDSWITH(c, e) ((c) == (e) || ((c) == 0 && endch == (e))) - #define PUGI__SKIPWS() { while (PUGI__IS_CHARTYPE(*s, ct_space)) ++s; } - #define PUGI__OPTSET(OPT) ( optmsk & (OPT) ) - #define PUGI__PUSHNODE(TYPE) { cursor = append_new_node(cursor, *alloc, TYPE); if (!cursor) PUGI__THROW_ERROR(status_out_of_memory, s); } - #define PUGI__POPNODE() { cursor = cursor->parent; } - #define PUGI__SCANFOR(X) { while (*s != 0 && !(X)) ++s; } - #define PUGI__SCANWHILE(X) { while (X) ++s; } - #define PUGI__SCANWHILE_UNROLL(X) { for (;;) { char_t ss = s[0]; if (PUGI__UNLIKELY(!(X))) { break; } ss = s[1]; if (PUGI__UNLIKELY(!(X))) { s += 1; break; } ss = s[2]; if (PUGI__UNLIKELY(!(X))) { s += 2; break; } ss = s[3]; if (PUGI__UNLIKELY(!(X))) { s += 3; break; } s += 4; } } - #define PUGI__ENDSEG() { ch = *s; *s = 0; ++s; } - #define PUGI__THROW_ERROR(err, m) return error_offset = m, error_status = err, static_cast<char_t*>(0) - #define PUGI__CHECK_ERROR(err, m) { if (*s == 0) PUGI__THROW_ERROR(err, m); } - - PUGI__FN char_t* strconv_comment(char_t* s, char_t endch) - { - gap g; - - while (true) - { - PUGI__SCANWHILE_UNROLL(!PUGI__IS_CHARTYPE(ss, ct_parse_comment)); - - if (*s == '\r') // Either a single 0x0d or 0x0d 0x0a pair - { - *s++ = '\n'; // replace first one with 0x0a - - if (*s == '\n') g.push(s, 1); - } - else if (s[0] == '-' && s[1] == '-' && PUGI__ENDSWITH(s[2], '>')) // comment ends here - { - *g.flush(s) = 0; - - return s + (s[2] == '>' ? 3 : 2); - } - else if (*s == 0) - { - return 0; - } - else ++s; - } - } - - PUGI__FN char_t* strconv_cdata(char_t* s, char_t endch) - { - gap g; - - while (true) - { - PUGI__SCANWHILE_UNROLL(!PUGI__IS_CHARTYPE(ss, ct_parse_cdata)); - - if (*s == '\r') // Either a single 0x0d or 0x0d 0x0a pair - { - *s++ = '\n'; // replace first one with 0x0a - - if (*s == '\n') g.push(s, 1); - } - else if (s[0] == ']' && s[1] == ']' && PUGI__ENDSWITH(s[2], '>')) // CDATA ends here - { - *g.flush(s) = 0; - - return s + 1; - } - else if (*s == 0) - { - return 0; - } - else ++s; - } - } - - typedef char_t* (*strconv_pcdata_t)(char_t*); - - template <typename opt_trim, typename opt_eol, typename opt_escape> struct strconv_pcdata_impl - { - static char_t* parse(char_t* s) - { - gap g; - - char_t* begin = s; - - while (true) - { - PUGI__SCANWHILE_UNROLL(!PUGI__IS_CHARTYPE(ss, ct_parse_pcdata)); - - if (*s == '<') // PCDATA ends here - { - char_t* end = g.flush(s); - - if (opt_trim::value) - while (end > begin && PUGI__IS_CHARTYPE(end[-1], ct_space)) - --end; - - *end = 0; - - return s + 1; - } - else if (opt_eol::value && *s == '\r') // Either a single 0x0d or 0x0d 0x0a pair - { - *s++ = '\n'; // replace first one with 0x0a - - if (*s == '\n') g.push(s, 1); - } - else if (opt_escape::value && *s == '&') - { - s = strconv_escape(s, g); - } - else if (*s == 0) - { - char_t* end = g.flush(s); - - if (opt_trim::value) - while (end > begin && PUGI__IS_CHARTYPE(end[-1], ct_space)) - --end; - - *end = 0; - - return s; - } - else ++s; - } - } - }; - - PUGI__FN strconv_pcdata_t get_strconv_pcdata(unsigned int optmask) - { - PUGI__STATIC_ASSERT(parse_escapes == 0x10 && parse_eol == 0x20 && parse_trim_pcdata == 0x0800); - - switch (((optmask >> 4) & 3) | ((optmask >> 9) & 4)) // get bitmask for flags (trim eol escapes); this simultaneously checks 3 options from assertion above - { - case 0: return strconv_pcdata_impl<opt_false, opt_false, opt_false>::parse; - case 1: return strconv_pcdata_impl<opt_false, opt_false, opt_true>::parse; - case 2: return strconv_pcdata_impl<opt_false, opt_true, opt_false>::parse; - case 3: return strconv_pcdata_impl<opt_false, opt_true, opt_true>::parse; - case 4: return strconv_pcdata_impl<opt_true, opt_false, opt_false>::parse; - case 5: return strconv_pcdata_impl<opt_true, opt_false, opt_true>::parse; - case 6: return strconv_pcdata_impl<opt_true, opt_true, opt_false>::parse; - case 7: return strconv_pcdata_impl<opt_true, opt_true, opt_true>::parse; - default: assert(false); return 0; // unreachable - } - } - - typedef char_t* (*strconv_attribute_t)(char_t*, char_t); - - template <typename opt_escape> struct strconv_attribute_impl - { - static char_t* parse_wnorm(char_t* s, char_t end_quote) - { - gap g; - - // trim leading whitespaces - if (PUGI__IS_CHARTYPE(*s, ct_space)) - { - char_t* str = s; - - do ++str; - while (PUGI__IS_CHARTYPE(*str, ct_space)); - - g.push(s, str - s); - } - - while (true) - { - PUGI__SCANWHILE_UNROLL(!PUGI__IS_CHARTYPE(ss, ct_parse_attr_ws | ct_space)); - - if (*s == end_quote) - { - char_t* str = g.flush(s); - - do *str-- = 0; - while (PUGI__IS_CHARTYPE(*str, ct_space)); - - return s + 1; - } - else if (PUGI__IS_CHARTYPE(*s, ct_space)) - { - *s++ = ' '; - - if (PUGI__IS_CHARTYPE(*s, ct_space)) - { - char_t* str = s + 1; - while (PUGI__IS_CHARTYPE(*str, ct_space)) ++str; - - g.push(s, str - s); - } - } - else if (opt_escape::value && *s == '&') - { - s = strconv_escape(s, g); - } - else if (!*s) - { - return 0; - } - else ++s; - } - } - - static char_t* parse_wconv(char_t* s, char_t end_quote) - { - gap g; - - while (true) - { - PUGI__SCANWHILE_UNROLL(!PUGI__IS_CHARTYPE(ss, ct_parse_attr_ws)); - - if (*s == end_quote) - { - *g.flush(s) = 0; - - return s + 1; - } - else if (PUGI__IS_CHARTYPE(*s, ct_space)) - { - if (*s == '\r') - { - *s++ = ' '; - - if (*s == '\n') g.push(s, 1); - } - else *s++ = ' '; - } - else if (opt_escape::value && *s == '&') - { - s = strconv_escape(s, g); - } - else if (!*s) - { - return 0; - } - else ++s; - } - } - - static char_t* parse_eol(char_t* s, char_t end_quote) - { - gap g; - - while (true) - { - PUGI__SCANWHILE_UNROLL(!PUGI__IS_CHARTYPE(ss, ct_parse_attr)); - - if (*s == end_quote) - { - *g.flush(s) = 0; - - return s + 1; - } - else if (*s == '\r') - { - *s++ = '\n'; - - if (*s == '\n') g.push(s, 1); - } - else if (opt_escape::value && *s == '&') - { - s = strconv_escape(s, g); - } - else if (!*s) - { - return 0; - } - else ++s; - } - } - - static char_t* parse_simple(char_t* s, char_t end_quote) - { - gap g; - - while (true) - { - PUGI__SCANWHILE_UNROLL(!PUGI__IS_CHARTYPE(ss, ct_parse_attr)); - - if (*s == end_quote) - { - *g.flush(s) = 0; - - return s + 1; - } - else if (opt_escape::value && *s == '&') - { - s = strconv_escape(s, g); - } - else if (!*s) - { - return 0; - } - else ++s; - } - } - }; - - PUGI__FN strconv_attribute_t get_strconv_attribute(unsigned int optmask) - { - PUGI__STATIC_ASSERT(parse_escapes == 0x10 && parse_eol == 0x20 && parse_wconv_attribute == 0x40 && parse_wnorm_attribute == 0x80); - - switch ((optmask >> 4) & 15) // get bitmask for flags (wnorm wconv eol escapes); this simultaneously checks 4 options from assertion above - { - case 0: return strconv_attribute_impl<opt_false>::parse_simple; - case 1: return strconv_attribute_impl<opt_true>::parse_simple; - case 2: return strconv_attribute_impl<opt_false>::parse_eol; - case 3: return strconv_attribute_impl<opt_true>::parse_eol; - case 4: return strconv_attribute_impl<opt_false>::parse_wconv; - case 5: return strconv_attribute_impl<opt_true>::parse_wconv; - case 6: return strconv_attribute_impl<opt_false>::parse_wconv; - case 7: return strconv_attribute_impl<opt_true>::parse_wconv; - case 8: return strconv_attribute_impl<opt_false>::parse_wnorm; - case 9: return strconv_attribute_impl<opt_true>::parse_wnorm; - case 10: return strconv_attribute_impl<opt_false>::parse_wnorm; - case 11: return strconv_attribute_impl<opt_true>::parse_wnorm; - case 12: return strconv_attribute_impl<opt_false>::parse_wnorm; - case 13: return strconv_attribute_impl<opt_true>::parse_wnorm; - case 14: return strconv_attribute_impl<opt_false>::parse_wnorm; - case 15: return strconv_attribute_impl<opt_true>::parse_wnorm; - default: assert(false); return 0; // unreachable - } - } - - inline xml_parse_result make_parse_result(xml_parse_status status, ptrdiff_t offset = 0) - { - xml_parse_result result; - result.status = status; - result.offset = offset; - - return result; - } - - struct xml_parser - { - xml_allocator* alloc; - char_t* error_offset; - xml_parse_status error_status; - - xml_parser(xml_allocator* alloc_): alloc(alloc_), error_offset(0), error_status(status_ok) - { - } - - // DOCTYPE consists of nested sections of the following possible types: - // <!-- ... -->, <? ... ?>, "...", '...' - // <![...]]> - // <!...> - // First group can not contain nested groups - // Second group can contain nested groups of the same type - // Third group can contain all other groups - char_t* parse_doctype_primitive(char_t* s) - { - if (*s == '"' || *s == '\'') - { - // quoted string - char_t ch = *s++; - PUGI__SCANFOR(*s == ch); - if (!*s) PUGI__THROW_ERROR(status_bad_doctype, s); - - s++; - } - else if (s[0] == '<' && s[1] == '?') - { - // <? ... ?> - s += 2; - PUGI__SCANFOR(s[0] == '?' && s[1] == '>'); // no need for ENDSWITH because ?> can't terminate proper doctype - if (!*s) PUGI__THROW_ERROR(status_bad_doctype, s); - - s += 2; - } - else if (s[0] == '<' && s[1] == '!' && s[2] == '-' && s[3] == '-') - { - s += 4; - PUGI__SCANFOR(s[0] == '-' && s[1] == '-' && s[2] == '>'); // no need for ENDSWITH because --> can't terminate proper doctype - if (!*s) PUGI__THROW_ERROR(status_bad_doctype, s); - - s += 3; - } - else PUGI__THROW_ERROR(status_bad_doctype, s); - - return s; - } - - char_t* parse_doctype_ignore(char_t* s) - { - size_t depth = 0; - - assert(s[0] == '<' && s[1] == '!' && s[2] == '['); - s += 3; - - while (*s) - { - if (s[0] == '<' && s[1] == '!' && s[2] == '[') - { - // nested ignore section - s += 3; - depth++; - } - else if (s[0] == ']' && s[1] == ']' && s[2] == '>') - { - // ignore section end - s += 3; - - if (depth == 0) - return s; - - depth--; - } - else s++; - } - - PUGI__THROW_ERROR(status_bad_doctype, s); - } - - char_t* parse_doctype_group(char_t* s, char_t endch) - { - size_t depth = 0; - - assert((s[0] == '<' || s[0] == 0) && s[1] == '!'); - s += 2; - - while (*s) - { - if (s[0] == '<' && s[1] == '!' && s[2] != '-') - { - if (s[2] == '[') - { - // ignore - s = parse_doctype_ignore(s); - if (!s) return s; - } - else - { - // some control group - s += 2; - depth++; - } - } - else if (s[0] == '<' || s[0] == '"' || s[0] == '\'') - { - // unknown tag (forbidden), or some primitive group - s = parse_doctype_primitive(s); - if (!s) return s; - } - else if (*s == '>') - { - if (depth == 0) - return s; - - depth--; - s++; - } - else s++; - } - - if (depth != 0 || endch != '>') PUGI__THROW_ERROR(status_bad_doctype, s); - - return s; - } - - char_t* parse_exclamation(char_t* s, xml_node_struct* cursor, unsigned int optmsk, char_t endch) - { - // parse node contents, starting with exclamation mark - ++s; - - if (*s == '-') // '<!-...' - { - ++s; - - if (*s == '-') // '<!--...' - { - ++s; - - if (PUGI__OPTSET(parse_comments)) - { - PUGI__PUSHNODE(node_comment); // Append a new node on the tree. - cursor->value = s; // Save the offset. - } - - if (PUGI__OPTSET(parse_eol) && PUGI__OPTSET(parse_comments)) - { - s = strconv_comment(s, endch); - - if (!s) PUGI__THROW_ERROR(status_bad_comment, cursor->value); - } - else - { - // Scan for terminating '-->'. - PUGI__SCANFOR(s[0] == '-' && s[1] == '-' && PUGI__ENDSWITH(s[2], '>')); - PUGI__CHECK_ERROR(status_bad_comment, s); - - if (PUGI__OPTSET(parse_comments)) - *s = 0; // Zero-terminate this segment at the first terminating '-'. - - s += (s[2] == '>' ? 3 : 2); // Step over the '\0->'. - } - } - else PUGI__THROW_ERROR(status_bad_comment, s); - } - else if (*s == '[') - { - // '<![CDATA[...' - if (*++s=='C' && *++s=='D' && *++s=='A' && *++s=='T' && *++s=='A' && *++s == '[') - { - ++s; - - if (PUGI__OPTSET(parse_cdata)) - { - PUGI__PUSHNODE(node_cdata); // Append a new node on the tree. - cursor->value = s; // Save the offset. - - if (PUGI__OPTSET(parse_eol)) - { - s = strconv_cdata(s, endch); - - if (!s) PUGI__THROW_ERROR(status_bad_cdata, cursor->value); - } - else - { - // Scan for terminating ']]>'. - PUGI__SCANFOR(s[0] == ']' && s[1] == ']' && PUGI__ENDSWITH(s[2], '>')); - PUGI__CHECK_ERROR(status_bad_cdata, s); - - *s++ = 0; // Zero-terminate this segment. - } - } - else // Flagged for discard, but we still have to scan for the terminator. - { - // Scan for terminating ']]>'. - PUGI__SCANFOR(s[0] == ']' && s[1] == ']' && PUGI__ENDSWITH(s[2], '>')); - PUGI__CHECK_ERROR(status_bad_cdata, s); - - ++s; - } - - s += (s[1] == '>' ? 2 : 1); // Step over the last ']>'. - } - else PUGI__THROW_ERROR(status_bad_cdata, s); - } - else if (s[0] == 'D' && s[1] == 'O' && s[2] == 'C' && s[3] == 'T' && s[4] == 'Y' && s[5] == 'P' && PUGI__ENDSWITH(s[6], 'E')) - { - s -= 2; - - if (cursor->parent) PUGI__THROW_ERROR(status_bad_doctype, s); - - char_t* mark = s + 9; - - s = parse_doctype_group(s, endch); - if (!s) return s; - - assert((*s == 0 && endch == '>') || *s == '>'); - if (*s) *s++ = 0; - - if (PUGI__OPTSET(parse_doctype)) - { - while (PUGI__IS_CHARTYPE(*mark, ct_space)) ++mark; - - PUGI__PUSHNODE(node_doctype); - - cursor->value = mark; - } - } - else if (*s == 0 && endch == '-') PUGI__THROW_ERROR(status_bad_comment, s); - else if (*s == 0 && endch == '[') PUGI__THROW_ERROR(status_bad_cdata, s); - else PUGI__THROW_ERROR(status_unrecognized_tag, s); - - return s; - } - - char_t* parse_question(char_t* s, xml_node_struct*& ref_cursor, unsigned int optmsk, char_t endch) - { - // load into registers - xml_node_struct* cursor = ref_cursor; - char_t ch = 0; - - // parse node contents, starting with question mark - ++s; - - // read PI target - char_t* target = s; - - if (!PUGI__IS_CHARTYPE(*s, ct_start_symbol)) PUGI__THROW_ERROR(status_bad_pi, s); - - PUGI__SCANWHILE(PUGI__IS_CHARTYPE(*s, ct_symbol)); - PUGI__CHECK_ERROR(status_bad_pi, s); - - // determine node type; stricmp / strcasecmp is not portable - bool declaration = (target[0] | ' ') == 'x' && (target[1] | ' ') == 'm' && (target[2] | ' ') == 'l' && target + 3 == s; - - if (declaration ? PUGI__OPTSET(parse_declaration) : PUGI__OPTSET(parse_pi)) - { - if (declaration) - { - // disallow non top-level declarations - if (cursor->parent) PUGI__THROW_ERROR(status_bad_pi, s); - - PUGI__PUSHNODE(node_declaration); - } - else - { - PUGI__PUSHNODE(node_pi); - } - - cursor->name = target; - - PUGI__ENDSEG(); - - // parse value/attributes - if (ch == '?') - { - // empty node - if (!PUGI__ENDSWITH(*s, '>')) PUGI__THROW_ERROR(status_bad_pi, s); - s += (*s == '>'); - - PUGI__POPNODE(); - } - else if (PUGI__IS_CHARTYPE(ch, ct_space)) - { - PUGI__SKIPWS(); - - // scan for tag end - char_t* value = s; - - PUGI__SCANFOR(s[0] == '?' && PUGI__ENDSWITH(s[1], '>')); - PUGI__CHECK_ERROR(status_bad_pi, s); - - if (declaration) - { - // replace ending ? with / so that 'element' terminates properly - *s = '/'; - - // we exit from this function with cursor at node_declaration, which is a signal to parse() to go to LOC_ATTRIBUTES - s = value; - } - else - { - // store value and step over > - cursor->value = value; - - PUGI__POPNODE(); - - PUGI__ENDSEG(); - - s += (*s == '>'); - } - } - else PUGI__THROW_ERROR(status_bad_pi, s); - } - else - { - // scan for tag end - PUGI__SCANFOR(s[0] == '?' && PUGI__ENDSWITH(s[1], '>')); - PUGI__CHECK_ERROR(status_bad_pi, s); - - s += (s[1] == '>' ? 2 : 1); - } - - // store from registers - ref_cursor = cursor; - - return s; - } - - char_t* parse_tree(char_t* s, xml_node_struct* root, unsigned int optmsk, char_t endch) - { - strconv_attribute_t strconv_attribute = get_strconv_attribute(optmsk); - strconv_pcdata_t strconv_pcdata = get_strconv_pcdata(optmsk); - - char_t ch = 0; - xml_node_struct* cursor = root; - char_t* mark = s; - - while (*s != 0) - { - if (*s == '<') - { - ++s; - - LOC_TAG: - if (PUGI__IS_CHARTYPE(*s, ct_start_symbol)) // '<#...' - { - PUGI__PUSHNODE(node_element); // Append a new node to the tree. - - cursor->name = s; - - PUGI__SCANWHILE_UNROLL(PUGI__IS_CHARTYPE(ss, ct_symbol)); // Scan for a terminator. - PUGI__ENDSEG(); // Save char in 'ch', terminate & step over. - - if (ch == '>') - { - // end of tag - } - else if (PUGI__IS_CHARTYPE(ch, ct_space)) - { - LOC_ATTRIBUTES: - while (true) - { - PUGI__SKIPWS(); // Eat any whitespace. - - if (PUGI__IS_CHARTYPE(*s, ct_start_symbol)) // <... #... - { - xml_attribute_struct* a = append_new_attribute(cursor, *alloc); // Make space for this attribute. - if (!a) PUGI__THROW_ERROR(status_out_of_memory, s); - - a->name = s; // Save the offset. - - PUGI__SCANWHILE_UNROLL(PUGI__IS_CHARTYPE(ss, ct_symbol)); // Scan for a terminator. - PUGI__ENDSEG(); // Save char in 'ch', terminate & step over. - - if (PUGI__IS_CHARTYPE(ch, ct_space)) - { - PUGI__SKIPWS(); // Eat any whitespace. - - ch = *s; - ++s; - } - - if (ch == '=') // '<... #=...' - { - PUGI__SKIPWS(); // Eat any whitespace. - - if (*s == '"' || *s == '\'') // '<... #="...' - { - ch = *s; // Save quote char to avoid breaking on "''" -or- '""'. - ++s; // Step over the quote. - a->value = s; // Save the offset. - - s = strconv_attribute(s, ch); - - if (!s) PUGI__THROW_ERROR(status_bad_attribute, a->value); - - // After this line the loop continues from the start; - // Whitespaces, / and > are ok, symbols and EOF are wrong, - // everything else will be detected - if (PUGI__IS_CHARTYPE(*s, ct_start_symbol)) PUGI__THROW_ERROR(status_bad_attribute, s); - } - else PUGI__THROW_ERROR(status_bad_attribute, s); - } - else PUGI__THROW_ERROR(status_bad_attribute, s); - } - else if (*s == '/') - { - ++s; - - if (*s == '>') - { - PUGI__POPNODE(); - s++; - break; - } - else if (*s == 0 && endch == '>') - { - PUGI__POPNODE(); - break; - } - else PUGI__THROW_ERROR(status_bad_start_element, s); - } - else if (*s == '>') - { - ++s; - - break; - } - else if (*s == 0 && endch == '>') - { - break; - } - else PUGI__THROW_ERROR(status_bad_start_element, s); - } - - // !!! - } - else if (ch == '/') // '<#.../' - { - if (!PUGI__ENDSWITH(*s, '>')) PUGI__THROW_ERROR(status_bad_start_element, s); - - PUGI__POPNODE(); // Pop. - - s += (*s == '>'); - } - else if (ch == 0) - { - // we stepped over null terminator, backtrack & handle closing tag - --s; - - if (endch != '>') PUGI__THROW_ERROR(status_bad_start_element, s); - } - else PUGI__THROW_ERROR(status_bad_start_element, s); - } - else if (*s == '/') - { - ++s; - - mark = s; - - char_t* name = cursor->name; - if (!name) PUGI__THROW_ERROR(status_end_element_mismatch, mark); - - while (PUGI__IS_CHARTYPE(*s, ct_symbol)) - { - if (*s++ != *name++) PUGI__THROW_ERROR(status_end_element_mismatch, mark); - } - - if (*name) - { - if (*s == 0 && name[0] == endch && name[1] == 0) PUGI__THROW_ERROR(status_bad_end_element, s); - else PUGI__THROW_ERROR(status_end_element_mismatch, mark); - } - - PUGI__POPNODE(); // Pop. - - PUGI__SKIPWS(); - - if (*s == 0) - { - if (endch != '>') PUGI__THROW_ERROR(status_bad_end_element, s); - } - else - { - if (*s != '>') PUGI__THROW_ERROR(status_bad_end_element, s); - ++s; - } - } - else if (*s == '?') // '<?...' - { - s = parse_question(s, cursor, optmsk, endch); - if (!s) return s; - - assert(cursor); - if (PUGI__NODETYPE(cursor) == node_declaration) goto LOC_ATTRIBUTES; - } - else if (*s == '!') // '<!...' - { - s = parse_exclamation(s, cursor, optmsk, endch); - if (!s) return s; - } - else if (*s == 0 && endch == '?') PUGI__THROW_ERROR(status_bad_pi, s); - else PUGI__THROW_ERROR(status_unrecognized_tag, s); - } - else - { - mark = s; // Save this offset while searching for a terminator. - - PUGI__SKIPWS(); // Eat whitespace if no genuine PCDATA here. - - if (*s == '<' || !*s) - { - // We skipped some whitespace characters because otherwise we would take the tag branch instead of PCDATA one - assert(mark != s); - - if (!PUGI__OPTSET(parse_ws_pcdata | parse_ws_pcdata_single) || PUGI__OPTSET(parse_trim_pcdata)) - { - continue; - } - else if (PUGI__OPTSET(parse_ws_pcdata_single)) - { - if (s[0] != '<' || s[1] != '/' || cursor->first_child) continue; - } - } - - if (!PUGI__OPTSET(parse_trim_pcdata)) - s = mark; - - if (cursor->parent || PUGI__OPTSET(parse_fragment)) - { - if (PUGI__OPTSET(parse_embed_pcdata) && cursor->parent && !cursor->first_child && !cursor->value) - { - cursor->value = s; // Save the offset. - } - else - { - PUGI__PUSHNODE(node_pcdata); // Append a new node on the tree. - - cursor->value = s; // Save the offset. - - PUGI__POPNODE(); // Pop since this is a standalone. - } - - s = strconv_pcdata(s); - - if (!*s) break; - } - else - { - PUGI__SCANFOR(*s == '<'); // '...<' - if (!*s) break; - - ++s; - } - - // We're after '<' - goto LOC_TAG; - } - } - - // check that last tag is closed - if (cursor != root) PUGI__THROW_ERROR(status_end_element_mismatch, s); - - return s; - } - - #ifdef PUGIXML_WCHAR_MODE - static char_t* parse_skip_bom(char_t* s) - { - unsigned int bom = 0xfeff; - return (s[0] == static_cast<wchar_t>(bom)) ? s + 1 : s; - } - #else - static char_t* parse_skip_bom(char_t* s) - { - return (s[0] == '\xef' && s[1] == '\xbb' && s[2] == '\xbf') ? s + 3 : s; - } - #endif - - static bool has_element_node_siblings(xml_node_struct* node) - { - while (node) - { - if (PUGI__NODETYPE(node) == node_element) return true; - - node = node->next_sibling; - } - - return false; - } - - static xml_parse_result parse(char_t* buffer, size_t length, xml_document_struct* xmldoc, xml_node_struct* root, unsigned int optmsk) - { - // early-out for empty documents - if (length == 0) - return make_parse_result(PUGI__OPTSET(parse_fragment) ? status_ok : status_no_document_element); - - // get last child of the root before parsing - xml_node_struct* last_root_child = root->first_child ? root->first_child->prev_sibling_c + 0 : 0; - - // create parser on stack - xml_parser parser(static_cast<xml_allocator*>(xmldoc)); - - // save last character and make buffer zero-terminated (speeds up parsing) - char_t endch = buffer[length - 1]; - buffer[length - 1] = 0; - - // skip BOM to make sure it does not end up as part of parse output - char_t* buffer_data = parse_skip_bom(buffer); - - // perform actual parsing - parser.parse_tree(buffer_data, root, optmsk, endch); - - xml_parse_result result = make_parse_result(parser.error_status, parser.error_offset ? parser.error_offset - buffer : 0); - assert(result.offset >= 0 && static_cast<size_t>(result.offset) <= length); - - if (result) - { - // since we removed last character, we have to handle the only possible false positive (stray <) - if (endch == '<') - return make_parse_result(status_unrecognized_tag, length - 1); - - // check if there are any element nodes parsed - xml_node_struct* first_root_child_parsed = last_root_child ? last_root_child->next_sibling + 0 : root->first_child+ 0; - - if (!PUGI__OPTSET(parse_fragment) && !has_element_node_siblings(first_root_child_parsed)) - return make_parse_result(status_no_document_element, length - 1); - } - else - { - // roll back offset if it occurs on a null terminator in the source buffer - if (result.offset > 0 && static_cast<size_t>(result.offset) == length - 1 && endch == 0) - result.offset--; - } - - return result; - } - }; - - // Output facilities - PUGI__FN xml_encoding get_write_native_encoding() - { - #ifdef PUGIXML_WCHAR_MODE - return get_wchar_encoding(); - #else - return encoding_utf8; - #endif - } - - PUGI__FN xml_encoding get_write_encoding(xml_encoding encoding) - { - // replace wchar encoding with utf implementation - if (encoding == encoding_wchar) return get_wchar_encoding(); - - // replace utf16 encoding with utf16 with specific endianness - if (encoding == encoding_utf16) return is_little_endian() ? encoding_utf16_le : encoding_utf16_be; - - // replace utf32 encoding with utf32 with specific endianness - if (encoding == encoding_utf32) return is_little_endian() ? encoding_utf32_le : encoding_utf32_be; - - // only do autodetection if no explicit encoding is requested - if (encoding != encoding_auto) return encoding; - - // assume utf8 encoding - return encoding_utf8; - } - - template <typename D, typename T> PUGI__FN size_t convert_buffer_output_generic(typename T::value_type dest, const char_t* data, size_t length, D, T) - { - PUGI__STATIC_ASSERT(sizeof(char_t) == sizeof(typename D::type)); - - typename T::value_type end = D::process(reinterpret_cast<const typename D::type*>(data), length, dest, T()); - - return static_cast<size_t>(end - dest) * sizeof(*dest); - } - - template <typename D, typename T> PUGI__FN size_t convert_buffer_output_generic(typename T::value_type dest, const char_t* data, size_t length, D, T, bool opt_swap) - { - PUGI__STATIC_ASSERT(sizeof(char_t) == sizeof(typename D::type)); - - typename T::value_type end = D::process(reinterpret_cast<const typename D::type*>(data), length, dest, T()); - - if (opt_swap) - { - for (typename T::value_type i = dest; i != end; ++i) - *i = endian_swap(*i); - } - - return static_cast<size_t>(end - dest) * sizeof(*dest); - } - -#ifdef PUGIXML_WCHAR_MODE - PUGI__FN size_t get_valid_length(const char_t* data, size_t length) - { - if (length < 1) return 0; - - // discard last character if it's the lead of a surrogate pair - return (sizeof(wchar_t) == 2 && static_cast<unsigned int>(static_cast<uint16_t>(data[length - 1]) - 0xD800) < 0x400) ? length - 1 : length; - } - - PUGI__FN size_t convert_buffer_output(char_t* r_char, uint8_t* r_u8, uint16_t* r_u16, uint32_t* r_u32, const char_t* data, size_t length, xml_encoding encoding) - { - // only endian-swapping is required - if (need_endian_swap_utf(encoding, get_wchar_encoding())) - { - convert_wchar_endian_swap(r_char, data, length); - - return length * sizeof(char_t); - } - - // convert to utf8 - if (encoding == encoding_utf8) - return convert_buffer_output_generic(r_u8, data, length, wchar_decoder(), utf8_writer()); - - // convert to utf16 - if (encoding == encoding_utf16_be || encoding == encoding_utf16_le) - { - xml_encoding native_encoding = is_little_endian() ? encoding_utf16_le : encoding_utf16_be; - - return convert_buffer_output_generic(r_u16, data, length, wchar_decoder(), utf16_writer(), native_encoding != encoding); - } - - // convert to utf32 - if (encoding == encoding_utf32_be || encoding == encoding_utf32_le) - { - xml_encoding native_encoding = is_little_endian() ? encoding_utf32_le : encoding_utf32_be; - - return convert_buffer_output_generic(r_u32, data, length, wchar_decoder(), utf32_writer(), native_encoding != encoding); - } - - // convert to latin1 - if (encoding == encoding_latin1) - return convert_buffer_output_generic(r_u8, data, length, wchar_decoder(), latin1_writer()); - - assert(false && "Invalid encoding"); // unreachable - return 0; - } -#else - PUGI__FN size_t get_valid_length(const char_t* data, size_t length) - { - if (length < 5) return 0; - - for (size_t i = 1; i <= 4; ++i) - { - uint8_t ch = static_cast<uint8_t>(data[length - i]); - - // either a standalone character or a leading one - if ((ch & 0xc0) != 0x80) return length - i; - } - - // there are four non-leading characters at the end, sequence tail is broken so might as well process the whole chunk - return length; - } - - PUGI__FN size_t convert_buffer_output(char_t* /* r_char */, uint8_t* r_u8, uint16_t* r_u16, uint32_t* r_u32, const char_t* data, size_t length, xml_encoding encoding) - { - if (encoding == encoding_utf16_be || encoding == encoding_utf16_le) - { - xml_encoding native_encoding = is_little_endian() ? encoding_utf16_le : encoding_utf16_be; - - return convert_buffer_output_generic(r_u16, data, length, utf8_decoder(), utf16_writer(), native_encoding != encoding); - } - - if (encoding == encoding_utf32_be || encoding == encoding_utf32_le) - { - xml_encoding native_encoding = is_little_endian() ? encoding_utf32_le : encoding_utf32_be; - - return convert_buffer_output_generic(r_u32, data, length, utf8_decoder(), utf32_writer(), native_encoding != encoding); - } - - if (encoding == encoding_latin1) - return convert_buffer_output_generic(r_u8, data, length, utf8_decoder(), latin1_writer()); - - assert(false && "Invalid encoding"); // unreachable - return 0; - } -#endif - - class xml_buffered_writer - { - xml_buffered_writer(const xml_buffered_writer&); - xml_buffered_writer& operator=(const xml_buffered_writer&); - - public: - xml_buffered_writer(xml_writer& writer_, xml_encoding user_encoding): writer(writer_), bufsize(0), encoding(get_write_encoding(user_encoding)) - { - PUGI__STATIC_ASSERT(bufcapacity >= 8); - } - - size_t flush() - { - flush(buffer, bufsize); - bufsize = 0; - return 0; - } - - void flush(const char_t* data, size_t size) - { - if (size == 0) return; - - // fast path, just write data - if (encoding == get_write_native_encoding()) - writer.write(data, size * sizeof(char_t)); - else - { - // convert chunk - size_t result = convert_buffer_output(scratch.data_char, scratch.data_u8, scratch.data_u16, scratch.data_u32, data, size, encoding); - assert(result <= sizeof(scratch)); - - // write data - writer.write(scratch.data_u8, result); - } - } - - void write_direct(const char_t* data, size_t length) - { - // flush the remaining buffer contents - flush(); - - // handle large chunks - if (length > bufcapacity) - { - if (encoding == get_write_native_encoding()) - { - // fast path, can just write data chunk - writer.write(data, length * sizeof(char_t)); - return; - } - - // need to convert in suitable chunks - while (length > bufcapacity) - { - // get chunk size by selecting such number of characters that are guaranteed to fit into scratch buffer - // and form a complete codepoint sequence (i.e. discard start of last codepoint if necessary) - size_t chunk_size = get_valid_length(data, bufcapacity); - assert(chunk_size); - - // convert chunk and write - flush(data, chunk_size); - - // iterate - data += chunk_size; - length -= chunk_size; - } - - // small tail is copied below - bufsize = 0; - } - - memcpy(buffer + bufsize, data, length * sizeof(char_t)); - bufsize += length; - } - - void write_buffer(const char_t* data, size_t length) - { - size_t offset = bufsize; - - if (offset + length <= bufcapacity) - { - memcpy(buffer + offset, data, length * sizeof(char_t)); - bufsize = offset + length; - } - else - { - write_direct(data, length); - } - } - - void write_string(const char_t* data) - { - // write the part of the string that fits in the buffer - size_t offset = bufsize; - - while (*data && offset < bufcapacity) - buffer[offset++] = *data++; - - // write the rest - if (offset < bufcapacity) - { - bufsize = offset; - } - else - { - // backtrack a bit if we have split the codepoint - size_t length = offset - bufsize; - size_t extra = length - get_valid_length(data - length, length); - - bufsize = offset - extra; - - write_direct(data - extra, strlength(data) + extra); - } - } - - void write(char_t d0) - { - size_t offset = bufsize; - if (offset > bufcapacity - 1) offset = flush(); - - buffer[offset + 0] = d0; - bufsize = offset + 1; - } - - void write(char_t d0, char_t d1) - { - size_t offset = bufsize; - if (offset > bufcapacity - 2) offset = flush(); - - buffer[offset + 0] = d0; - buffer[offset + 1] = d1; - bufsize = offset + 2; - } - - void write(char_t d0, char_t d1, char_t d2) - { - size_t offset = bufsize; - if (offset > bufcapacity - 3) offset = flush(); - - buffer[offset + 0] = d0; - buffer[offset + 1] = d1; - buffer[offset + 2] = d2; - bufsize = offset + 3; - } - - void write(char_t d0, char_t d1, char_t d2, char_t d3) - { - size_t offset = bufsize; - if (offset > bufcapacity - 4) offset = flush(); - - buffer[offset + 0] = d0; - buffer[offset + 1] = d1; - buffer[offset + 2] = d2; - buffer[offset + 3] = d3; - bufsize = offset + 4; - } - - void write(char_t d0, char_t d1, char_t d2, char_t d3, char_t d4) - { - size_t offset = bufsize; - if (offset > bufcapacity - 5) offset = flush(); - - buffer[offset + 0] = d0; - buffer[offset + 1] = d1; - buffer[offset + 2] = d2; - buffer[offset + 3] = d3; - buffer[offset + 4] = d4; - bufsize = offset + 5; - } - - void write(char_t d0, char_t d1, char_t d2, char_t d3, char_t d4, char_t d5) - { - size_t offset = bufsize; - if (offset > bufcapacity - 6) offset = flush(); - - buffer[offset + 0] = d0; - buffer[offset + 1] = d1; - buffer[offset + 2] = d2; - buffer[offset + 3] = d3; - buffer[offset + 4] = d4; - buffer[offset + 5] = d5; - bufsize = offset + 6; - } - - // utf8 maximum expansion: x4 (-> utf32) - // utf16 maximum expansion: x2 (-> utf32) - // utf32 maximum expansion: x1 - enum - { - bufcapacitybytes = - #ifdef PUGIXML_MEMORY_OUTPUT_STACK - PUGIXML_MEMORY_OUTPUT_STACK - #else - 10240 - #endif - , - bufcapacity = bufcapacitybytes / (sizeof(char_t) + 4) - }; - - char_t buffer[bufcapacity]; - - union - { - uint8_t data_u8[4 * bufcapacity]; - uint16_t data_u16[2 * bufcapacity]; - uint32_t data_u32[bufcapacity]; - char_t data_char[bufcapacity]; - } scratch; - - xml_writer& writer; - size_t bufsize; - xml_encoding encoding; - }; - - PUGI__FN void text_output_escaped(xml_buffered_writer& writer, const char_t* s, chartypex_t type, unsigned int flags) - { - while (*s) - { - const char_t* prev = s; - - // While *s is a usual symbol - PUGI__SCANWHILE_UNROLL(!PUGI__IS_CHARTYPEX(ss, type)); - - writer.write_buffer(prev, static_cast<size_t>(s - prev)); - - switch (*s) - { - case 0: break; - case '&': - writer.write('&', 'a', 'm', 'p', ';'); - ++s; - break; - case '<': - writer.write('&', 'l', 't', ';'); - ++s; - break; - case '>': - writer.write('&', 'g', 't', ';'); - ++s; - break; - case '"': - if (flags & format_attribute_single_quote) - writer.write('"'); - else - writer.write('&', 'q', 'u', 'o', 't', ';'); - ++s; - break; - case '\'': - if (flags & format_attribute_single_quote) - writer.write('&', 'a', 'p', 'o', 's', ';'); - else - writer.write('\''); - ++s; - break; - default: // s is not a usual symbol - { - unsigned int ch = static_cast<unsigned int>(*s++); - assert(ch < 32); - - if (!(flags & format_skip_control_chars)) - writer.write('&', '#', static_cast<char_t>((ch / 10) + '0'), static_cast<char_t>((ch % 10) + '0'), ';'); - } - } - } - } - - PUGI__FN void text_output(xml_buffered_writer& writer, const char_t* s, chartypex_t type, unsigned int flags) - { - if (flags & format_no_escapes) - writer.write_string(s); - else - text_output_escaped(writer, s, type, flags); - } - - PUGI__FN void text_output_cdata(xml_buffered_writer& writer, const char_t* s) - { - do - { - writer.write('<', '!', '[', 'C', 'D'); - writer.write('A', 'T', 'A', '['); - - const char_t* prev = s; - - // look for ]]> sequence - we can't output it as is since it terminates CDATA - while (*s && !(s[0] == ']' && s[1] == ']' && s[2] == '>')) ++s; - - // skip ]] if we stopped at ]]>, > will go to the next CDATA section - if (*s) s += 2; - - writer.write_buffer(prev, static_cast<size_t>(s - prev)); - - writer.write(']', ']', '>'); - } - while (*s); - } - - PUGI__FN void text_output_indent(xml_buffered_writer& writer, const char_t* indent, size_t indent_length, unsigned int depth) - { - switch (indent_length) - { - case 1: - { - for (unsigned int i = 0; i < depth; ++i) - writer.write(indent[0]); - break; - } - - case 2: - { - for (unsigned int i = 0; i < depth; ++i) - writer.write(indent[0], indent[1]); - break; - } - - case 3: - { - for (unsigned int i = 0; i < depth; ++i) - writer.write(indent[0], indent[1], indent[2]); - break; - } - - case 4: - { - for (unsigned int i = 0; i < depth; ++i) - writer.write(indent[0], indent[1], indent[2], indent[3]); - break; - } - - default: - { - for (unsigned int i = 0; i < depth; ++i) - writer.write_buffer(indent, indent_length); - } - } - } - - PUGI__FN void node_output_comment(xml_buffered_writer& writer, const char_t* s) - { - writer.write('<', '!', '-', '-'); - - while (*s) - { - const char_t* prev = s; - - // look for -\0 or -- sequence - we can't output it since -- is illegal in comment body - while (*s && !(s[0] == '-' && (s[1] == '-' || s[1] == 0))) ++s; - - writer.write_buffer(prev, static_cast<size_t>(s - prev)); - - if (*s) - { - assert(*s == '-'); - - writer.write('-', ' '); - ++s; - } - } - - writer.write('-', '-', '>'); - } - - PUGI__FN void node_output_pi_value(xml_buffered_writer& writer, const char_t* s) - { - while (*s) - { - const char_t* prev = s; - - // look for ?> sequence - we can't output it since ?> terminates PI - while (*s && !(s[0] == '?' && s[1] == '>')) ++s; - - writer.write_buffer(prev, static_cast<size_t>(s - prev)); - - if (*s) - { - assert(s[0] == '?' && s[1] == '>'); - - writer.write('?', ' ', '>'); - s += 2; - } - } - } - - PUGI__FN void node_output_attributes(xml_buffered_writer& writer, xml_node_struct* node, const char_t* indent, size_t indent_length, unsigned int flags, unsigned int depth) - { - const char_t* default_name = PUGIXML_TEXT(":anonymous"); - const char_t enquotation_char = (flags & format_attribute_single_quote) ? '\'' : '"'; - - for (xml_attribute_struct* a = node->first_attribute; a; a = a->next_attribute) - { - if ((flags & (format_indent_attributes | format_raw)) == format_indent_attributes) - { - writer.write('\n'); - - text_output_indent(writer, indent, indent_length, depth + 1); - } - else - { - writer.write(' '); - } - - writer.write_string(a->name ? a->name + 0 : default_name); - writer.write('=', enquotation_char); - - if (a->value) - text_output(writer, a->value, ctx_special_attr, flags); - - writer.write(enquotation_char); - } - } - - PUGI__FN bool node_output_start(xml_buffered_writer& writer, xml_node_struct* node, const char_t* indent, size_t indent_length, unsigned int flags, unsigned int depth) - { - const char_t* default_name = PUGIXML_TEXT(":anonymous"); - const char_t* name = node->name ? node->name + 0 : default_name; - - writer.write('<'); - writer.write_string(name); - - if (node->first_attribute) - node_output_attributes(writer, node, indent, indent_length, flags, depth); - - // element nodes can have value if parse_embed_pcdata was used - if (!node->value) - { - if (!node->first_child) - { - if (flags & format_no_empty_element_tags) - { - writer.write('>', '<', '/'); - writer.write_string(name); - writer.write('>'); - - return false; - } - else - { - if ((flags & format_raw) == 0) - writer.write(' '); - - writer.write('/', '>'); - - return false; - } - } - else - { - writer.write('>'); - - return true; - } - } - else - { - writer.write('>'); - - text_output(writer, node->value, ctx_special_pcdata, flags); - - if (!node->first_child) - { - writer.write('<', '/'); - writer.write_string(name); - writer.write('>'); - - return false; - } - else - { - return true; - } - } - } - - PUGI__FN void node_output_end(xml_buffered_writer& writer, xml_node_struct* node) - { - const char_t* default_name = PUGIXML_TEXT(":anonymous"); - const char_t* name = node->name ? node->name + 0 : default_name; - - writer.write('<', '/'); - writer.write_string(name); - writer.write('>'); - } - - PUGI__FN void node_output_simple(xml_buffered_writer& writer, xml_node_struct* node, unsigned int flags) - { - const char_t* default_name = PUGIXML_TEXT(":anonymous"); - - switch (PUGI__NODETYPE(node)) - { - case node_pcdata: - text_output(writer, node->value ? node->value + 0 : PUGIXML_TEXT(""), ctx_special_pcdata, flags); - break; - - case node_cdata: - text_output_cdata(writer, node->value ? node->value + 0 : PUGIXML_TEXT("")); - break; - - case node_comment: - node_output_comment(writer, node->value ? node->value + 0 : PUGIXML_TEXT("")); - break; - - case node_pi: - writer.write('<', '?'); - writer.write_string(node->name ? node->name + 0 : default_name); - - if (node->value) - { - writer.write(' '); - node_output_pi_value(writer, node->value); - } - - writer.write('?', '>'); - break; - - case node_declaration: - writer.write('<', '?'); - writer.write_string(node->name ? node->name + 0 : default_name); - node_output_attributes(writer, node, PUGIXML_TEXT(""), 0, flags | format_raw, 0); - writer.write('?', '>'); - break; - - case node_doctype: - writer.write('<', '!', 'D', 'O', 'C'); - writer.write('T', 'Y', 'P', 'E'); - - if (node->value) - { - writer.write(' '); - writer.write_string(node->value); - } - - writer.write('>'); - break; - - default: - assert(false && "Invalid node type"); // unreachable - } - } - - enum indent_flags_t - { - indent_newline = 1, - indent_indent = 2 - }; - - PUGI__FN void node_output(xml_buffered_writer& writer, xml_node_struct* root, const char_t* indent, unsigned int flags, unsigned int depth) - { - size_t indent_length = ((flags & (format_indent | format_indent_attributes)) && (flags & format_raw) == 0) ? strlength(indent) : 0; - unsigned int indent_flags = indent_indent; - - xml_node_struct* node = root; - - do - { - assert(node); - - // begin writing current node - if (PUGI__NODETYPE(node) == node_pcdata || PUGI__NODETYPE(node) == node_cdata) - { - node_output_simple(writer, node, flags); - - indent_flags = 0; - } - else - { - if ((indent_flags & indent_newline) && (flags & format_raw) == 0) - writer.write('\n'); - - if ((indent_flags & indent_indent) && indent_length) - text_output_indent(writer, indent, indent_length, depth); - - if (PUGI__NODETYPE(node) == node_element) - { - indent_flags = indent_newline | indent_indent; - - if (node_output_start(writer, node, indent, indent_length, flags, depth)) - { - // element nodes can have value if parse_embed_pcdata was used - if (node->value) - indent_flags = 0; - - node = node->first_child; - depth++; - continue; - } - } - else if (PUGI__NODETYPE(node) == node_document) - { - indent_flags = indent_indent; - - if (node->first_child) - { - node = node->first_child; - continue; - } - } - else - { - node_output_simple(writer, node, flags); - - indent_flags = indent_newline | indent_indent; - } - } - - // continue to the next node - while (node != root) - { - if (node->next_sibling) - { - node = node->next_sibling; - break; - } - - node = node->parent; - - // write closing node - if (PUGI__NODETYPE(node) == node_element) - { - depth--; - - if ((indent_flags & indent_newline) && (flags & format_raw) == 0) - writer.write('\n'); - - if ((indent_flags & indent_indent) && indent_length) - text_output_indent(writer, indent, indent_length, depth); - - node_output_end(writer, node); - - indent_flags = indent_newline | indent_indent; - } - } - } - while (node != root); - - if ((indent_flags & indent_newline) && (flags & format_raw) == 0) - writer.write('\n'); - } - - PUGI__FN bool has_declaration(xml_node_struct* node) - { - for (xml_node_struct* child = node->first_child; child; child = child->next_sibling) - { - xml_node_type type = PUGI__NODETYPE(child); - - if (type == node_declaration) return true; - if (type == node_element) return false; - } - - return false; - } - - PUGI__FN bool is_attribute_of(xml_attribute_struct* attr, xml_node_struct* node) - { - for (xml_attribute_struct* a = node->first_attribute; a; a = a->next_attribute) - if (a == attr) - return true; - - return false; - } - - PUGI__FN bool allow_insert_attribute(xml_node_type parent) - { - return parent == node_element || parent == node_declaration; - } - - PUGI__FN bool allow_insert_child(xml_node_type parent, xml_node_type child) - { - if (parent != node_document && parent != node_element) return false; - if (child == node_document || child == node_null) return false; - if (parent != node_document && (child == node_declaration || child == node_doctype)) return false; - - return true; - } - - PUGI__FN bool allow_move(xml_node parent, xml_node child) - { - // check that child can be a child of parent - if (!allow_insert_child(parent.type(), child.type())) - return false; - - // check that node is not moved between documents - if (parent.root() != child.root()) - return false; - - // check that new parent is not in the child subtree - xml_node cur = parent; - - while (cur) - { - if (cur == child) - return false; - - cur = cur.parent(); - } - - return true; - } - - template <typename String, typename Header> - PUGI__FN void node_copy_string(String& dest, Header& header, uintptr_t header_mask, char_t* source, Header& source_header, xml_allocator* alloc) - { - assert(!dest && (header & header_mask) == 0); - - if (source) - { - if (alloc && (source_header & header_mask) == 0) - { - dest = source; - - // since strcpy_insitu can reuse document buffer memory we need to mark both source and dest as shared - header |= xml_memory_page_contents_shared_mask; - source_header |= xml_memory_page_contents_shared_mask; - } - else - strcpy_insitu(dest, header, header_mask, source, strlength(source)); - } - } - - PUGI__FN void node_copy_contents(xml_node_struct* dn, xml_node_struct* sn, xml_allocator* shared_alloc) - { - node_copy_string(dn->name, dn->header, xml_memory_page_name_allocated_mask, sn->name, sn->header, shared_alloc); - node_copy_string(dn->value, dn->header, xml_memory_page_value_allocated_mask, sn->value, sn->header, shared_alloc); - - for (xml_attribute_struct* sa = sn->first_attribute; sa; sa = sa->next_attribute) - { - xml_attribute_struct* da = append_new_attribute(dn, get_allocator(dn)); - - if (da) - { - node_copy_string(da->name, da->header, xml_memory_page_name_allocated_mask, sa->name, sa->header, shared_alloc); - node_copy_string(da->value, da->header, xml_memory_page_value_allocated_mask, sa->value, sa->header, shared_alloc); - } - } - } - - PUGI__FN void node_copy_tree(xml_node_struct* dn, xml_node_struct* sn) - { - xml_allocator& alloc = get_allocator(dn); - xml_allocator* shared_alloc = (&alloc == &get_allocator(sn)) ? &alloc : 0; - - node_copy_contents(dn, sn, shared_alloc); - - xml_node_struct* dit = dn; - xml_node_struct* sit = sn->first_child; - - while (sit && sit != sn) - { - // loop invariant: dit is inside the subtree rooted at dn - assert(dit); - - // when a tree is copied into one of the descendants, we need to skip that subtree to avoid an infinite loop - if (sit != dn) - { - xml_node_struct* copy = append_new_node(dit, alloc, PUGI__NODETYPE(sit)); - - if (copy) - { - node_copy_contents(copy, sit, shared_alloc); - - if (sit->first_child) - { - dit = copy; - sit = sit->first_child; - continue; - } - } - } - - // continue to the next node - do - { - if (sit->next_sibling) - { - sit = sit->next_sibling; - break; - } - - sit = sit->parent; - dit = dit->parent; - - // loop invariant: dit is inside the subtree rooted at dn while sit is inside sn - assert(sit == sn || dit); - } - while (sit != sn); - } - - assert(!sit || dit == dn->parent); - } - - PUGI__FN void node_copy_attribute(xml_attribute_struct* da, xml_attribute_struct* sa) - { - xml_allocator& alloc = get_allocator(da); - xml_allocator* shared_alloc = (&alloc == &get_allocator(sa)) ? &alloc : 0; - - node_copy_string(da->name, da->header, xml_memory_page_name_allocated_mask, sa->name, sa->header, shared_alloc); - node_copy_string(da->value, da->header, xml_memory_page_value_allocated_mask, sa->value, sa->header, shared_alloc); - } - - inline bool is_text_node(xml_node_struct* node) - { - xml_node_type type = PUGI__NODETYPE(node); - - return type == node_pcdata || type == node_cdata; - } - - // get value with conversion functions - template <typename U> PUGI__FN PUGI__UNSIGNED_OVERFLOW U string_to_integer(const char_t* value, U minv, U maxv) - { - U result = 0; - const char_t* s = value; - - while (PUGI__IS_CHARTYPE(*s, ct_space)) - s++; - - bool negative = (*s == '-'); - - s += (*s == '+' || *s == '-'); - - bool overflow = false; - - if (s[0] == '0' && (s[1] | ' ') == 'x') - { - s += 2; - - // since overflow detection relies on length of the sequence skip leading zeros - while (*s == '0') - s++; - - const char_t* start = s; - - for (;;) - { - if (static_cast<unsigned>(*s - '0') < 10) - result = result * 16 + (*s - '0'); - else if (static_cast<unsigned>((*s | ' ') - 'a') < 6) - result = result * 16 + ((*s | ' ') - 'a' + 10); - else - break; - - s++; - } - - size_t digits = static_cast<size_t>(s - start); - - overflow = digits > sizeof(U) * 2; - } - else - { - // since overflow detection relies on length of the sequence skip leading zeros - while (*s == '0') - s++; - - const char_t* start = s; - - for (;;) - { - if (static_cast<unsigned>(*s - '0') < 10) - result = result * 10 + (*s - '0'); - else - break; - - s++; - } - - size_t digits = static_cast<size_t>(s - start); - - PUGI__STATIC_ASSERT(sizeof(U) == 8 || sizeof(U) == 4 || sizeof(U) == 2); - - const size_t max_digits10 = sizeof(U) == 8 ? 20 : sizeof(U) == 4 ? 10 : 5; - const char_t max_lead = sizeof(U) == 8 ? '1' : sizeof(U) == 4 ? '4' : '6'; - const size_t high_bit = sizeof(U) * 8 - 1; - - overflow = digits >= max_digits10 && !(digits == max_digits10 && (*start < max_lead || (*start == max_lead && result >> high_bit))); - } - - if (negative) - { - // Workaround for crayc++ CC-3059: Expected no overflow in routine. - #ifdef _CRAYC - return (overflow || result > ~minv + 1) ? minv : ~result + 1; - #else - return (overflow || result > 0 - minv) ? minv : 0 - result; - #endif - } - else - return (overflow || result > maxv) ? maxv : result; - } - - PUGI__FN int get_value_int(const char_t* value) - { - return string_to_integer<unsigned int>(value, static_cast<unsigned int>(INT_MIN), INT_MAX); - } - - PUGI__FN unsigned int get_value_uint(const char_t* value) - { - return string_to_integer<unsigned int>(value, 0, UINT_MAX); - } - - PUGI__FN double get_value_double(const char_t* value) - { - #ifdef PUGIXML_WCHAR_MODE - return wcstod(value, 0); - #else - return strtod(value, 0); - #endif - } - - PUGI__FN float get_value_float(const char_t* value) - { - #ifdef PUGIXML_WCHAR_MODE - return static_cast<float>(wcstod(value, 0)); - #else - return static_cast<float>(strtod(value, 0)); - #endif - } - - PUGI__FN bool get_value_bool(const char_t* value) - { - // only look at first char - char_t first = *value; - - // 1*, t* (true), T* (True), y* (yes), Y* (YES) - return (first == '1' || first == 't' || first == 'T' || first == 'y' || first == 'Y'); - } - -#ifdef PUGIXML_HAS_LONG_LONG - PUGI__FN long long get_value_llong(const char_t* value) - { - return string_to_integer<unsigned long long>(value, static_cast<unsigned long long>(LLONG_MIN), LLONG_MAX); - } - - PUGI__FN unsigned long long get_value_ullong(const char_t* value) - { - return string_to_integer<unsigned long long>(value, 0, ULLONG_MAX); - } -#endif - - template <typename U> PUGI__FN PUGI__UNSIGNED_OVERFLOW char_t* integer_to_string(char_t* begin, char_t* end, U value, bool negative) - { - char_t* result = end - 1; - U rest = negative ? 0 - value : value; - - do - { - *result-- = static_cast<char_t>('0' + (rest % 10)); - rest /= 10; - } - while (rest); - - assert(result >= begin); - (void)begin; - - *result = '-'; - - return result + !negative; - } - - // set value with conversion functions - template <typename String, typename Header> - PUGI__FN bool set_value_ascii(String& dest, Header& header, uintptr_t header_mask, char* buf) - { - #ifdef PUGIXML_WCHAR_MODE - char_t wbuf[128]; - assert(strlen(buf) < sizeof(wbuf) / sizeof(wbuf[0])); - - size_t offset = 0; - for (; buf[offset]; ++offset) wbuf[offset] = buf[offset]; - - return strcpy_insitu(dest, header, header_mask, wbuf, offset); - #else - return strcpy_insitu(dest, header, header_mask, buf, strlen(buf)); - #endif - } - - template <typename U, typename String, typename Header> - PUGI__FN bool set_value_integer(String& dest, Header& header, uintptr_t header_mask, U value, bool negative) - { - char_t buf[64]; - char_t* end = buf + sizeof(buf) / sizeof(buf[0]); - char_t* begin = integer_to_string(buf, end, value, negative); - - return strcpy_insitu(dest, header, header_mask, begin, end - begin); - } - - template <typename String, typename Header> - PUGI__FN bool set_value_convert(String& dest, Header& header, uintptr_t header_mask, float value, int precision) - { - char buf[128]; - PUGI__SNPRINTF(buf, "%.*g", precision, double(value)); - - return set_value_ascii(dest, header, header_mask, buf); - } - - template <typename String, typename Header> - PUGI__FN bool set_value_convert(String& dest, Header& header, uintptr_t header_mask, double value, int precision) - { - char buf[128]; - PUGI__SNPRINTF(buf, "%.*g", precision, value); - - return set_value_ascii(dest, header, header_mask, buf); - } - - template <typename String, typename Header> - PUGI__FN bool set_value_bool(String& dest, Header& header, uintptr_t header_mask, bool value) - { - return strcpy_insitu(dest, header, header_mask, value ? PUGIXML_TEXT("true") : PUGIXML_TEXT("false"), value ? 4 : 5); - } - - PUGI__FN xml_parse_result load_buffer_impl(xml_document_struct* doc, xml_node_struct* root, void* contents, size_t size, unsigned int options, xml_encoding encoding, bool is_mutable, bool own, char_t** out_buffer) - { - // check input buffer - if (!contents && size) return make_parse_result(status_io_error); - - // get actual encoding - xml_encoding buffer_encoding = impl::get_buffer_encoding(encoding, contents, size); - - // get private buffer - char_t* buffer = 0; - size_t length = 0; - - // coverity[var_deref_model] - if (!impl::convert_buffer(buffer, length, buffer_encoding, contents, size, is_mutable)) return impl::make_parse_result(status_out_of_memory); - - // delete original buffer if we performed a conversion - if (own && buffer != contents && contents) impl::xml_memory::deallocate(contents); - - // grab onto buffer if it's our buffer, user is responsible for deallocating contents himself - if (own || buffer != contents) *out_buffer = buffer; - - // store buffer for offset_debug - doc->buffer = buffer; - - // parse - xml_parse_result res = impl::xml_parser::parse(buffer, length, doc, root, options); - - // remember encoding - res.encoding = buffer_encoding; - - return res; - } - - // we need to get length of entire file to load it in memory; the only (relatively) sane way to do it is via seek/tell trick - PUGI__FN xml_parse_status get_file_size(FILE* file, size_t& out_result) - { - #if defined(PUGI__MSVC_CRT_VERSION) && PUGI__MSVC_CRT_VERSION >= 1400 && !defined(_WIN32_WCE) - // there are 64-bit versions of fseek/ftell, let's use them - typedef __int64 length_type; - - _fseeki64(file, 0, SEEK_END); - length_type length = _ftelli64(file); - _fseeki64(file, 0, SEEK_SET); - #elif defined(__MINGW32__) && !defined(__NO_MINGW_LFS) && (!defined(__STRICT_ANSI__) || defined(__MINGW64_VERSION_MAJOR)) - // there are 64-bit versions of fseek/ftell, let's use them - typedef off64_t length_type; - - fseeko64(file, 0, SEEK_END); - length_type length = ftello64(file); - fseeko64(file, 0, SEEK_SET); - #else - // if this is a 32-bit OS, long is enough; if this is a unix system, long is 64-bit, which is enough; otherwise we can't do anything anyway. - typedef long length_type; - - fseek(file, 0, SEEK_END); - length_type length = ftell(file); - fseek(file, 0, SEEK_SET); - #endif - - // check for I/O errors - if (length < 0) return status_io_error; - - // check for overflow - size_t result = static_cast<size_t>(length); - - if (static_cast<length_type>(result) != length) return status_out_of_memory; - - // finalize - out_result = result; - - return status_ok; - } - - // This function assumes that buffer has extra sizeof(char_t) writable bytes after size - PUGI__FN size_t zero_terminate_buffer(void* buffer, size_t size, xml_encoding encoding) - { - // We only need to zero-terminate if encoding conversion does not do it for us - #ifdef PUGIXML_WCHAR_MODE - xml_encoding wchar_encoding = get_wchar_encoding(); - - if (encoding == wchar_encoding || need_endian_swap_utf(encoding, wchar_encoding)) - { - size_t length = size / sizeof(char_t); - - static_cast<char_t*>(buffer)[length] = 0; - return (length + 1) * sizeof(char_t); - } - #else - if (encoding == encoding_utf8) - { - static_cast<char*>(buffer)[size] = 0; - return size + 1; - } - #endif - - return size; - } - - PUGI__FN xml_parse_result load_file_impl(xml_document_struct* doc, FILE* file, unsigned int options, xml_encoding encoding, char_t** out_buffer) - { - if (!file) return make_parse_result(status_file_not_found); - - // get file size (can result in I/O errors) - size_t size = 0; - xml_parse_status size_status = get_file_size(file, size); - if (size_status != status_ok) return make_parse_result(size_status); - - size_t max_suffix_size = sizeof(char_t); - - // allocate buffer for the whole file - char* contents = static_cast<char*>(xml_memory::allocate(size + max_suffix_size)); - if (!contents) return make_parse_result(status_out_of_memory); - - // read file in memory - size_t read_size = fread(contents, 1, size, file); - - if (read_size != size) - { - xml_memory::deallocate(contents); - return make_parse_result(status_io_error); - } - - xml_encoding real_encoding = get_buffer_encoding(encoding, contents, size); - - return load_buffer_impl(doc, doc, contents, zero_terminate_buffer(contents, size, real_encoding), options, real_encoding, true, true, out_buffer); - } - - PUGI__FN void close_file(FILE* file) - { - fclose(file); - } - -#ifndef PUGIXML_NO_STL - template <typename T> struct xml_stream_chunk - { - static xml_stream_chunk* create() - { - void* memory = xml_memory::allocate(sizeof(xml_stream_chunk)); - if (!memory) return 0; - - return new (memory) xml_stream_chunk(); - } - - static void destroy(xml_stream_chunk* chunk) - { - // free chunk chain - while (chunk) - { - xml_stream_chunk* next_ = chunk->next; - - xml_memory::deallocate(chunk); - - chunk = next_; - } - } - - xml_stream_chunk(): next(0), size(0) - { - } - - xml_stream_chunk* next; - size_t size; - - T data[xml_memory_page_size / sizeof(T)]; - }; - - template <typename T> PUGI__FN xml_parse_status load_stream_data_noseek(std::basic_istream<T>& stream, void** out_buffer, size_t* out_size) - { - auto_deleter<xml_stream_chunk<T> > chunks(0, xml_stream_chunk<T>::destroy); - - // read file to a chunk list - size_t total = 0; - xml_stream_chunk<T>* last = 0; - - while (!stream.eof()) - { - // allocate new chunk - xml_stream_chunk<T>* chunk = xml_stream_chunk<T>::create(); - if (!chunk) return status_out_of_memory; - - // append chunk to list - if (last) last = last->next = chunk; - else chunks.data = last = chunk; - - // read data to chunk - stream.read(chunk->data, static_cast<std::streamsize>(sizeof(chunk->data) / sizeof(T))); - chunk->size = static_cast<size_t>(stream.gcount()) * sizeof(T); - - // read may set failbit | eofbit in case gcount() is less than read length, so check for other I/O errors - if (stream.bad() || (!stream.eof() && stream.fail())) return status_io_error; - - // guard against huge files (chunk size is small enough to make this overflow check work) - if (total + chunk->size < total) return status_out_of_memory; - total += chunk->size; - } - - size_t max_suffix_size = sizeof(char_t); - - // copy chunk list to a contiguous buffer - char* buffer = static_cast<char*>(xml_memory::allocate(total + max_suffix_size)); - if (!buffer) return status_out_of_memory; - - char* write = buffer; - - for (xml_stream_chunk<T>* chunk = chunks.data; chunk; chunk = chunk->next) - { - assert(write + chunk->size <= buffer + total); - memcpy(write, chunk->data, chunk->size); - write += chunk->size; - } - - assert(write == buffer + total); - - // return buffer - *out_buffer = buffer; - *out_size = total; - - return status_ok; - } - - template <typename T> PUGI__FN xml_parse_status load_stream_data_seek(std::basic_istream<T>& stream, void** out_buffer, size_t* out_size) - { - // get length of remaining data in stream - typename std::basic_istream<T>::pos_type pos = stream.tellg(); - stream.seekg(0, std::ios::end); - std::streamoff length = stream.tellg() - pos; - stream.seekg(pos); - - if (stream.fail() || pos < 0) return status_io_error; - - // guard against huge files - size_t read_length = static_cast<size_t>(length); - - if (static_cast<std::streamsize>(read_length) != length || length < 0) return status_out_of_memory; - - size_t max_suffix_size = sizeof(char_t); - - // read stream data into memory (guard against stream exceptions with buffer holder) - auto_deleter<void> buffer(xml_memory::allocate(read_length * sizeof(T) + max_suffix_size), xml_memory::deallocate); - if (!buffer.data) return status_out_of_memory; - - stream.read(static_cast<T*>(buffer.data), static_cast<std::streamsize>(read_length)); - - // read may set failbit | eofbit in case gcount() is less than read_length (i.e. line ending conversion), so check for other I/O errors - if (stream.bad() || (!stream.eof() && stream.fail())) return status_io_error; - - // return buffer - size_t actual_length = static_cast<size_t>(stream.gcount()); - assert(actual_length <= read_length); - - *out_buffer = buffer.release(); - *out_size = actual_length * sizeof(T); - - return status_ok; - } - - template <typename T> PUGI__FN xml_parse_result load_stream_impl(xml_document_struct* doc, std::basic_istream<T>& stream, unsigned int options, xml_encoding encoding, char_t** out_buffer) - { - void* buffer = 0; - size_t size = 0; - xml_parse_status status = status_ok; - - // if stream has an error bit set, bail out (otherwise tellg() can fail and we'll clear error bits) - if (stream.fail()) return make_parse_result(status_io_error); - - // load stream to memory (using seek-based implementation if possible, since it's faster and takes less memory) - if (stream.tellg() < 0) - { - stream.clear(); // clear error flags that could be set by a failing tellg - status = load_stream_data_noseek(stream, &buffer, &size); - } - else - status = load_stream_data_seek(stream, &buffer, &size); - - if (status != status_ok) return make_parse_result(status); - - xml_encoding real_encoding = get_buffer_encoding(encoding, buffer, size); - - return load_buffer_impl(doc, doc, buffer, zero_terminate_buffer(buffer, size, real_encoding), options, real_encoding, true, true, out_buffer); - } -#endif - -#if defined(PUGI__MSVC_CRT_VERSION) || defined(__BORLANDC__) || (defined(__MINGW32__) && (!defined(__STRICT_ANSI__) || defined(__MINGW64_VERSION_MAJOR))) - PUGI__FN FILE* open_file_wide(const wchar_t* path, const wchar_t* mode) - { -#if defined(PUGI__MSVC_CRT_VERSION) && PUGI__MSVC_CRT_VERSION >= 1400 - FILE* file = 0; - return _wfopen_s(&file, path, mode) == 0 ? file : 0; -#else - return _wfopen(path, mode); -#endif - } -#else - PUGI__FN char* convert_path_heap(const wchar_t* str) - { - assert(str); - - // first pass: get length in utf8 characters - size_t length = strlength_wide(str); - size_t size = as_utf8_begin(str, length); - - // allocate resulting string - char* result = static_cast<char*>(xml_memory::allocate(size + 1)); - if (!result) return 0; - - // second pass: convert to utf8 - as_utf8_end(result, size, str, length); - - // zero-terminate - result[size] = 0; - - return result; - } - - PUGI__FN FILE* open_file_wide(const wchar_t* path, const wchar_t* mode) - { - // there is no standard function to open wide paths, so our best bet is to try utf8 path - char* path_utf8 = convert_path_heap(path); - if (!path_utf8) return 0; - - // convert mode to ASCII (we mirror _wfopen interface) - char mode_ascii[4] = {0}; - for (size_t i = 0; mode[i]; ++i) mode_ascii[i] = static_cast<char>(mode[i]); - - // try to open the utf8 path - FILE* result = fopen(path_utf8, mode_ascii); - - // free dummy buffer - xml_memory::deallocate(path_utf8); - - return result; - } -#endif - - PUGI__FN FILE* open_file(const char* path, const char* mode) - { -#if defined(PUGI__MSVC_CRT_VERSION) && PUGI__MSVC_CRT_VERSION >= 1400 - FILE* file = 0; - return fopen_s(&file, path, mode) == 0 ? file : 0; -#else - return fopen(path, mode); -#endif - } - - PUGI__FN bool save_file_impl(const xml_document& doc, FILE* file, const char_t* indent, unsigned int flags, xml_encoding encoding) - { - if (!file) return false; - - xml_writer_file writer(file); - doc.save(writer, indent, flags, encoding); - - return ferror(file) == 0; - } - - struct name_null_sentry - { - xml_node_struct* node; - char_t* name; - - name_null_sentry(xml_node_struct* node_): node(node_), name(node_->name) - { - node->name = 0; - } - - ~name_null_sentry() - { - node->name = name; - } - }; -PUGI__NS_END - -namespace pugi -{ - PUGI__FN xml_writer_file::xml_writer_file(void* file_): file(file_) - { - } - - PUGI__FN void xml_writer_file::write(const void* data, size_t size) - { - size_t result = fwrite(data, 1, size, static_cast<FILE*>(file)); - (void)!result; // unfortunately we can't do proper error handling here - } - -#ifndef PUGIXML_NO_STL - PUGI__FN xml_writer_stream::xml_writer_stream(std::basic_ostream<char, std::char_traits<char> >& stream): narrow_stream(&stream), wide_stream(0) - { - } - - PUGI__FN xml_writer_stream::xml_writer_stream(std::basic_ostream<wchar_t, std::char_traits<wchar_t> >& stream): narrow_stream(0), wide_stream(&stream) - { - } - - PUGI__FN void xml_writer_stream::write(const void* data, size_t size) - { - if (narrow_stream) - { - assert(!wide_stream); - narrow_stream->write(reinterpret_cast<const char*>(data), static_cast<std::streamsize>(size)); - } - else - { - assert(wide_stream); - assert(size % sizeof(wchar_t) == 0); - - wide_stream->write(reinterpret_cast<const wchar_t*>(data), static_cast<std::streamsize>(size / sizeof(wchar_t))); - } - } -#endif - - PUGI__FN xml_tree_walker::xml_tree_walker(): _depth(0) - { - } - - PUGI__FN xml_tree_walker::~xml_tree_walker() - { - } - - PUGI__FN int xml_tree_walker::depth() const - { - return _depth; - } - - PUGI__FN bool xml_tree_walker::begin(xml_node&) - { - return true; - } - - PUGI__FN bool xml_tree_walker::end(xml_node&) - { - return true; - } - - PUGI__FN xml_attribute::xml_attribute(): _attr(0) - { - } - - PUGI__FN xml_attribute::xml_attribute(xml_attribute_struct* attr): _attr(attr) - { - } - - PUGI__FN static void unspecified_bool_xml_attribute(xml_attribute***) - { - } - - PUGI__FN xml_attribute::operator xml_attribute::unspecified_bool_type() const - { - return _attr ? unspecified_bool_xml_attribute : 0; - } - - PUGI__FN bool xml_attribute::operator!() const - { - return !_attr; - } - - PUGI__FN bool xml_attribute::operator==(const xml_attribute& r) const - { - return (_attr == r._attr); - } - - PUGI__FN bool xml_attribute::operator!=(const xml_attribute& r) const - { - return (_attr != r._attr); - } - - PUGI__FN bool xml_attribute::operator<(const xml_attribute& r) const - { - return (_attr < r._attr); - } - - PUGI__FN bool xml_attribute::operator>(const xml_attribute& r) const - { - return (_attr > r._attr); - } - - PUGI__FN bool xml_attribute::operator<=(const xml_attribute& r) const - { - return (_attr <= r._attr); - } - - PUGI__FN bool xml_attribute::operator>=(const xml_attribute& r) const - { - return (_attr >= r._attr); - } - - PUGI__FN xml_attribute xml_attribute::next_attribute() const - { - return _attr ? xml_attribute(_attr->next_attribute) : xml_attribute(); - } - - PUGI__FN xml_attribute xml_attribute::previous_attribute() const - { - return _attr && _attr->prev_attribute_c->next_attribute ? xml_attribute(_attr->prev_attribute_c) : xml_attribute(); - } - - PUGI__FN const char_t* xml_attribute::as_string(const char_t* def) const - { - return (_attr && _attr->value) ? _attr->value + 0 : def; - } - - PUGI__FN int xml_attribute::as_int(int def) const - { - return (_attr && _attr->value) ? impl::get_value_int(_attr->value) : def; - } - - PUGI__FN unsigned int xml_attribute::as_uint(unsigned int def) const - { - return (_attr && _attr->value) ? impl::get_value_uint(_attr->value) : def; - } - - PUGI__FN double xml_attribute::as_double(double def) const - { - return (_attr && _attr->value) ? impl::get_value_double(_attr->value) : def; - } - - PUGI__FN float xml_attribute::as_float(float def) const - { - return (_attr && _attr->value) ? impl::get_value_float(_attr->value) : def; - } - - PUGI__FN bool xml_attribute::as_bool(bool def) const - { - return (_attr && _attr->value) ? impl::get_value_bool(_attr->value) : def; - } - -#ifdef PUGIXML_HAS_LONG_LONG - PUGI__FN long long xml_attribute::as_llong(long long def) const - { - return (_attr && _attr->value) ? impl::get_value_llong(_attr->value) : def; - } - - PUGI__FN unsigned long long xml_attribute::as_ullong(unsigned long long def) const - { - return (_attr && _attr->value) ? impl::get_value_ullong(_attr->value) : def; - } -#endif - - PUGI__FN bool xml_attribute::empty() const - { - return !_attr; - } - - PUGI__FN const char_t* xml_attribute::name() const - { - return (_attr && _attr->name) ? _attr->name + 0 : PUGIXML_TEXT(""); - } - - PUGI__FN const char_t* xml_attribute::value() const - { - return (_attr && _attr->value) ? _attr->value + 0 : PUGIXML_TEXT(""); - } - - PUGI__FN size_t xml_attribute::hash_value() const - { - return static_cast<size_t>(reinterpret_cast<uintptr_t>(_attr) / sizeof(xml_attribute_struct)); - } - - PUGI__FN xml_attribute_struct* xml_attribute::internal_object() const - { - return _attr; - } - - PUGI__FN xml_attribute& xml_attribute::operator=(const char_t* rhs) - { - set_value(rhs); - return *this; - } - - PUGI__FN xml_attribute& xml_attribute::operator=(int rhs) - { - set_value(rhs); - return *this; - } - - PUGI__FN xml_attribute& xml_attribute::operator=(unsigned int rhs) - { - set_value(rhs); - return *this; - } - - PUGI__FN xml_attribute& xml_attribute::operator=(long rhs) - { - set_value(rhs); - return *this; - } - - PUGI__FN xml_attribute& xml_attribute::operator=(unsigned long rhs) - { - set_value(rhs); - return *this; - } - - PUGI__FN xml_attribute& xml_attribute::operator=(double rhs) - { - set_value(rhs); - return *this; - } - - PUGI__FN xml_attribute& xml_attribute::operator=(float rhs) - { - set_value(rhs); - return *this; - } - - PUGI__FN xml_attribute& xml_attribute::operator=(bool rhs) - { - set_value(rhs); - return *this; - } - -#ifdef PUGIXML_HAS_LONG_LONG - PUGI__FN xml_attribute& xml_attribute::operator=(long long rhs) - { - set_value(rhs); - return *this; - } - - PUGI__FN xml_attribute& xml_attribute::operator=(unsigned long long rhs) - { - set_value(rhs); - return *this; - } -#endif - - PUGI__FN bool xml_attribute::set_name(const char_t* rhs) - { - if (!_attr) return false; - - return impl::strcpy_insitu(_attr->name, _attr->header, impl::xml_memory_page_name_allocated_mask, rhs, impl::strlength(rhs)); - } - - PUGI__FN bool xml_attribute::set_value(const char_t* rhs) - { - if (!_attr) return false; - - return impl::strcpy_insitu(_attr->value, _attr->header, impl::xml_memory_page_value_allocated_mask, rhs, impl::strlength(rhs)); - } - - PUGI__FN bool xml_attribute::set_value(int rhs) - { - if (!_attr) return false; - - return impl::set_value_integer<unsigned int>(_attr->value, _attr->header, impl::xml_memory_page_value_allocated_mask, rhs, rhs < 0); - } - - PUGI__FN bool xml_attribute::set_value(unsigned int rhs) - { - if (!_attr) return false; - - return impl::set_value_integer<unsigned int>(_attr->value, _attr->header, impl::xml_memory_page_value_allocated_mask, rhs, false); - } - - PUGI__FN bool xml_attribute::set_value(long rhs) - { - if (!_attr) return false; - - return impl::set_value_integer<unsigned long>(_attr->value, _attr->header, impl::xml_memory_page_value_allocated_mask, rhs, rhs < 0); - } - - PUGI__FN bool xml_attribute::set_value(unsigned long rhs) - { - if (!_attr) return false; - - return impl::set_value_integer<unsigned long>(_attr->value, _attr->header, impl::xml_memory_page_value_allocated_mask, rhs, false); - } - - PUGI__FN bool xml_attribute::set_value(double rhs) - { - if (!_attr) return false; - - return impl::set_value_convert(_attr->value, _attr->header, impl::xml_memory_page_value_allocated_mask, rhs, default_double_precision); - } - - PUGI__FN bool xml_attribute::set_value(double rhs, int precision) - { - if (!_attr) return false; - - return impl::set_value_convert(_attr->value, _attr->header, impl::xml_memory_page_value_allocated_mask, rhs, precision); - } - - PUGI__FN bool xml_attribute::set_value(float rhs) - { - if (!_attr) return false; - - return impl::set_value_convert(_attr->value, _attr->header, impl::xml_memory_page_value_allocated_mask, rhs, default_float_precision); - } - - PUGI__FN bool xml_attribute::set_value(float rhs, int precision) - { - if (!_attr) return false; - - return impl::set_value_convert(_attr->value, _attr->header, impl::xml_memory_page_value_allocated_mask, rhs, precision); - } - - PUGI__FN bool xml_attribute::set_value(bool rhs) - { - if (!_attr) return false; - - return impl::set_value_bool(_attr->value, _attr->header, impl::xml_memory_page_value_allocated_mask, rhs); - } - -#ifdef PUGIXML_HAS_LONG_LONG - PUGI__FN bool xml_attribute::set_value(long long rhs) - { - if (!_attr) return false; - - return impl::set_value_integer<unsigned long long>(_attr->value, _attr->header, impl::xml_memory_page_value_allocated_mask, rhs, rhs < 0); - } - - PUGI__FN bool xml_attribute::set_value(unsigned long long rhs) - { - if (!_attr) return false; - - return impl::set_value_integer<unsigned long long>(_attr->value, _attr->header, impl::xml_memory_page_value_allocated_mask, rhs, false); - } -#endif - -#ifdef __BORLANDC__ - PUGI__FN bool operator&&(const xml_attribute& lhs, bool rhs) - { - return (bool)lhs && rhs; - } - - PUGI__FN bool operator||(const xml_attribute& lhs, bool rhs) - { - return (bool)lhs || rhs; - } -#endif - - PUGI__FN xml_node::xml_node(): _root(0) - { - } - - PUGI__FN xml_node::xml_node(xml_node_struct* p): _root(p) - { - } - - PUGI__FN static void unspecified_bool_xml_node(xml_node***) - { - } - - PUGI__FN xml_node::operator xml_node::unspecified_bool_type() const - { - return _root ? unspecified_bool_xml_node : 0; - } - - PUGI__FN bool xml_node::operator!() const - { - return !_root; - } - - PUGI__FN xml_node::iterator xml_node::begin() const - { - return iterator(_root ? _root->first_child + 0 : 0, _root); - } - - PUGI__FN xml_node::iterator xml_node::end() const - { - return iterator(0, _root); - } - - PUGI__FN xml_node::attribute_iterator xml_node::attributes_begin() const - { - return attribute_iterator(_root ? _root->first_attribute + 0 : 0, _root); - } - - PUGI__FN xml_node::attribute_iterator xml_node::attributes_end() const - { - return attribute_iterator(0, _root); - } - - PUGI__FN xml_object_range<xml_node_iterator> xml_node::children() const - { - return xml_object_range<xml_node_iterator>(begin(), end()); - } - - PUGI__FN xml_object_range<xml_named_node_iterator> xml_node::children(const char_t* name_) const - { - return xml_object_range<xml_named_node_iterator>(xml_named_node_iterator(child(name_)._root, _root, name_), xml_named_node_iterator(0, _root, name_)); - } - - PUGI__FN xml_object_range<xml_attribute_iterator> xml_node::attributes() const - { - return xml_object_range<xml_attribute_iterator>(attributes_begin(), attributes_end()); - } - - PUGI__FN bool xml_node::operator==(const xml_node& r) const - { - return (_root == r._root); - } - - PUGI__FN bool xml_node::operator!=(const xml_node& r) const - { - return (_root != r._root); - } - - PUGI__FN bool xml_node::operator<(const xml_node& r) const - { - return (_root < r._root); - } - - PUGI__FN bool xml_node::operator>(const xml_node& r) const - { - return (_root > r._root); - } - - PUGI__FN bool xml_node::operator<=(const xml_node& r) const - { - return (_root <= r._root); - } - - PUGI__FN bool xml_node::operator>=(const xml_node& r) const - { - return (_root >= r._root); - } - - PUGI__FN bool xml_node::empty() const - { - return !_root; - } - - PUGI__FN const char_t* xml_node::name() const - { - return (_root && _root->name) ? _root->name + 0 : PUGIXML_TEXT(""); - } - - PUGI__FN xml_node_type xml_node::type() const - { - return _root ? PUGI__NODETYPE(_root) : node_null; - } - - PUGI__FN const char_t* xml_node::value() const - { - return (_root && _root->value) ? _root->value + 0 : PUGIXML_TEXT(""); - } - - PUGI__FN xml_node xml_node::child(const char_t* name_) const - { - if (!_root) return xml_node(); - - for (xml_node_struct* i = _root->first_child; i; i = i->next_sibling) - if (i->name && impl::strequal(name_, i->name)) return xml_node(i); - - return xml_node(); - } - - PUGI__FN xml_attribute xml_node::attribute(const char_t* name_) const - { - if (!_root) return xml_attribute(); - - for (xml_attribute_struct* i = _root->first_attribute; i; i = i->next_attribute) - if (i->name && impl::strequal(name_, i->name)) - return xml_attribute(i); - - return xml_attribute(); - } - - PUGI__FN xml_node xml_node::next_sibling(const char_t* name_) const - { - if (!_root) return xml_node(); - - for (xml_node_struct* i = _root->next_sibling; i; i = i->next_sibling) - if (i->name && impl::strequal(name_, i->name)) return xml_node(i); - - return xml_node(); - } - - PUGI__FN xml_node xml_node::next_sibling() const - { - return _root ? xml_node(_root->next_sibling) : xml_node(); - } - - PUGI__FN xml_node xml_node::previous_sibling(const char_t* name_) const - { - if (!_root) return xml_node(); - - for (xml_node_struct* i = _root->prev_sibling_c; i->next_sibling; i = i->prev_sibling_c) - if (i->name && impl::strequal(name_, i->name)) return xml_node(i); - - return xml_node(); - } - - PUGI__FN xml_attribute xml_node::attribute(const char_t* name_, xml_attribute& hint_) const - { - xml_attribute_struct* hint = hint_._attr; - - // if hint is not an attribute of node, behavior is not defined - assert(!hint || (_root && impl::is_attribute_of(hint, _root))); - - if (!_root) return xml_attribute(); - - // optimistically search from hint up until the end - for (xml_attribute_struct* i = hint; i; i = i->next_attribute) - if (i->name && impl::strequal(name_, i->name)) - { - // update hint to maximize efficiency of searching for consecutive attributes - hint_._attr = i->next_attribute; - - return xml_attribute(i); - } - - // wrap around and search from the first attribute until the hint - // 'j' null pointer check is technically redundant, but it prevents a crash in case the assertion above fails - for (xml_attribute_struct* j = _root->first_attribute; j && j != hint; j = j->next_attribute) - if (j->name && impl::strequal(name_, j->name)) - { - // update hint to maximize efficiency of searching for consecutive attributes - hint_._attr = j->next_attribute; - - return xml_attribute(j); - } - - return xml_attribute(); - } - - PUGI__FN xml_node xml_node::previous_sibling() const - { - if (!_root) return xml_node(); - - if (_root->prev_sibling_c->next_sibling) return xml_node(_root->prev_sibling_c); - else return xml_node(); - } - - PUGI__FN xml_node xml_node::parent() const - { - return _root ? xml_node(_root->parent) : xml_node(); - } - - PUGI__FN xml_node xml_node::root() const - { - return _root ? xml_node(&impl::get_document(_root)) : xml_node(); - } - - PUGI__FN xml_text xml_node::text() const - { - return xml_text(_root); - } - - PUGI__FN const char_t* xml_node::child_value() const - { - if (!_root) return PUGIXML_TEXT(""); - - // element nodes can have value if parse_embed_pcdata was used - if (PUGI__NODETYPE(_root) == node_element && _root->value) - return _root->value; - - for (xml_node_struct* i = _root->first_child; i; i = i->next_sibling) - if (impl::is_text_node(i) && i->value) - return i->value; - - return PUGIXML_TEXT(""); - } - - PUGI__FN const char_t* xml_node::child_value(const char_t* name_) const - { - return child(name_).child_value(); - } - - PUGI__FN xml_attribute xml_node::first_attribute() const - { - return _root ? xml_attribute(_root->first_attribute) : xml_attribute(); - } - - PUGI__FN xml_attribute xml_node::last_attribute() const - { - return _root && _root->first_attribute ? xml_attribute(_root->first_attribute->prev_attribute_c) : xml_attribute(); - } - - PUGI__FN xml_node xml_node::first_child() const - { - return _root ? xml_node(_root->first_child) : xml_node(); - } - - PUGI__FN xml_node xml_node::last_child() const - { - return _root && _root->first_child ? xml_node(_root->first_child->prev_sibling_c) : xml_node(); - } - - PUGI__FN bool xml_node::set_name(const char_t* rhs) - { - xml_node_type type_ = _root ? PUGI__NODETYPE(_root) : node_null; - - if (type_ != node_element && type_ != node_pi && type_ != node_declaration) - return false; - - return impl::strcpy_insitu(_root->name, _root->header, impl::xml_memory_page_name_allocated_mask, rhs, impl::strlength(rhs)); - } - - PUGI__FN bool xml_node::set_value(const char_t* rhs) - { - xml_node_type type_ = _root ? PUGI__NODETYPE(_root) : node_null; - - if (type_ != node_pcdata && type_ != node_cdata && type_ != node_comment && type_ != node_pi && type_ != node_doctype) - return false; - - return impl::strcpy_insitu(_root->value, _root->header, impl::xml_memory_page_value_allocated_mask, rhs, impl::strlength(rhs)); - } - - PUGI__FN xml_attribute xml_node::append_attribute(const char_t* name_) - { - if (!impl::allow_insert_attribute(type())) return xml_attribute(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_attribute(); - - xml_attribute a(impl::allocate_attribute(alloc)); - if (!a) return xml_attribute(); - - impl::append_attribute(a._attr, _root); - - a.set_name(name_); - - return a; - } - - PUGI__FN xml_attribute xml_node::prepend_attribute(const char_t* name_) - { - if (!impl::allow_insert_attribute(type())) return xml_attribute(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_attribute(); - - xml_attribute a(impl::allocate_attribute(alloc)); - if (!a) return xml_attribute(); - - impl::prepend_attribute(a._attr, _root); - - a.set_name(name_); - - return a; - } - - PUGI__FN xml_attribute xml_node::insert_attribute_after(const char_t* name_, const xml_attribute& attr) - { - if (!impl::allow_insert_attribute(type())) return xml_attribute(); - if (!attr || !impl::is_attribute_of(attr._attr, _root)) return xml_attribute(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_attribute(); - - xml_attribute a(impl::allocate_attribute(alloc)); - if (!a) return xml_attribute(); - - impl::insert_attribute_after(a._attr, attr._attr, _root); - - a.set_name(name_); - - return a; - } - - PUGI__FN xml_attribute xml_node::insert_attribute_before(const char_t* name_, const xml_attribute& attr) - { - if (!impl::allow_insert_attribute(type())) return xml_attribute(); - if (!attr || !impl::is_attribute_of(attr._attr, _root)) return xml_attribute(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_attribute(); - - xml_attribute a(impl::allocate_attribute(alloc)); - if (!a) return xml_attribute(); - - impl::insert_attribute_before(a._attr, attr._attr, _root); - - a.set_name(name_); - - return a; - } - - PUGI__FN xml_attribute xml_node::append_copy(const xml_attribute& proto) - { - if (!proto) return xml_attribute(); - if (!impl::allow_insert_attribute(type())) return xml_attribute(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_attribute(); - - xml_attribute a(impl::allocate_attribute(alloc)); - if (!a) return xml_attribute(); - - impl::append_attribute(a._attr, _root); - impl::node_copy_attribute(a._attr, proto._attr); - - return a; - } - - PUGI__FN xml_attribute xml_node::prepend_copy(const xml_attribute& proto) - { - if (!proto) return xml_attribute(); - if (!impl::allow_insert_attribute(type())) return xml_attribute(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_attribute(); - - xml_attribute a(impl::allocate_attribute(alloc)); - if (!a) return xml_attribute(); - - impl::prepend_attribute(a._attr, _root); - impl::node_copy_attribute(a._attr, proto._attr); - - return a; - } - - PUGI__FN xml_attribute xml_node::insert_copy_after(const xml_attribute& proto, const xml_attribute& attr) - { - if (!proto) return xml_attribute(); - if (!impl::allow_insert_attribute(type())) return xml_attribute(); - if (!attr || !impl::is_attribute_of(attr._attr, _root)) return xml_attribute(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_attribute(); - - xml_attribute a(impl::allocate_attribute(alloc)); - if (!a) return xml_attribute(); - - impl::insert_attribute_after(a._attr, attr._attr, _root); - impl::node_copy_attribute(a._attr, proto._attr); - - return a; - } - - PUGI__FN xml_attribute xml_node::insert_copy_before(const xml_attribute& proto, const xml_attribute& attr) - { - if (!proto) return xml_attribute(); - if (!impl::allow_insert_attribute(type())) return xml_attribute(); - if (!attr || !impl::is_attribute_of(attr._attr, _root)) return xml_attribute(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_attribute(); - - xml_attribute a(impl::allocate_attribute(alloc)); - if (!a) return xml_attribute(); - - impl::insert_attribute_before(a._attr, attr._attr, _root); - impl::node_copy_attribute(a._attr, proto._attr); - - return a; - } - - PUGI__FN xml_node xml_node::append_child(xml_node_type type_) - { - if (!impl::allow_insert_child(type(), type_)) return xml_node(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_node(); - - xml_node n(impl::allocate_node(alloc, type_)); - if (!n) return xml_node(); - - impl::append_node(n._root, _root); - - if (type_ == node_declaration) n.set_name(PUGIXML_TEXT("xml")); - - return n; - } - - PUGI__FN xml_node xml_node::prepend_child(xml_node_type type_) - { - if (!impl::allow_insert_child(type(), type_)) return xml_node(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_node(); - - xml_node n(impl::allocate_node(alloc, type_)); - if (!n) return xml_node(); - - impl::prepend_node(n._root, _root); - - if (type_ == node_declaration) n.set_name(PUGIXML_TEXT("xml")); - - return n; - } - - PUGI__FN xml_node xml_node::insert_child_before(xml_node_type type_, const xml_node& node) - { - if (!impl::allow_insert_child(type(), type_)) return xml_node(); - if (!node._root || node._root->parent != _root) return xml_node(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_node(); - - xml_node n(impl::allocate_node(alloc, type_)); - if (!n) return xml_node(); - - impl::insert_node_before(n._root, node._root); - - if (type_ == node_declaration) n.set_name(PUGIXML_TEXT("xml")); - - return n; - } - - PUGI__FN xml_node xml_node::insert_child_after(xml_node_type type_, const xml_node& node) - { - if (!impl::allow_insert_child(type(), type_)) return xml_node(); - if (!node._root || node._root->parent != _root) return xml_node(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_node(); - - xml_node n(impl::allocate_node(alloc, type_)); - if (!n) return xml_node(); - - impl::insert_node_after(n._root, node._root); - - if (type_ == node_declaration) n.set_name(PUGIXML_TEXT("xml")); - - return n; - } - - PUGI__FN xml_node xml_node::append_child(const char_t* name_) - { - xml_node result = append_child(node_element); - - result.set_name(name_); - - return result; - } - - PUGI__FN xml_node xml_node::prepend_child(const char_t* name_) - { - xml_node result = prepend_child(node_element); - - result.set_name(name_); - - return result; - } - - PUGI__FN xml_node xml_node::insert_child_after(const char_t* name_, const xml_node& node) - { - xml_node result = insert_child_after(node_element, node); - - result.set_name(name_); - - return result; - } - - PUGI__FN xml_node xml_node::insert_child_before(const char_t* name_, const xml_node& node) - { - xml_node result = insert_child_before(node_element, node); - - result.set_name(name_); - - return result; - } - - PUGI__FN xml_node xml_node::append_copy(const xml_node& proto) - { - xml_node_type type_ = proto.type(); - if (!impl::allow_insert_child(type(), type_)) return xml_node(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_node(); - - xml_node n(impl::allocate_node(alloc, type_)); - if (!n) return xml_node(); - - impl::append_node(n._root, _root); - impl::node_copy_tree(n._root, proto._root); - - return n; - } - - PUGI__FN xml_node xml_node::prepend_copy(const xml_node& proto) - { - xml_node_type type_ = proto.type(); - if (!impl::allow_insert_child(type(), type_)) return xml_node(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_node(); - - xml_node n(impl::allocate_node(alloc, type_)); - if (!n) return xml_node(); - - impl::prepend_node(n._root, _root); - impl::node_copy_tree(n._root, proto._root); - - return n; - } - - PUGI__FN xml_node xml_node::insert_copy_after(const xml_node& proto, const xml_node& node) - { - xml_node_type type_ = proto.type(); - if (!impl::allow_insert_child(type(), type_)) return xml_node(); - if (!node._root || node._root->parent != _root) return xml_node(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_node(); - - xml_node n(impl::allocate_node(alloc, type_)); - if (!n) return xml_node(); - - impl::insert_node_after(n._root, node._root); - impl::node_copy_tree(n._root, proto._root); - - return n; - } - - PUGI__FN xml_node xml_node::insert_copy_before(const xml_node& proto, const xml_node& node) - { - xml_node_type type_ = proto.type(); - if (!impl::allow_insert_child(type(), type_)) return xml_node(); - if (!node._root || node._root->parent != _root) return xml_node(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_node(); - - xml_node n(impl::allocate_node(alloc, type_)); - if (!n) return xml_node(); - - impl::insert_node_before(n._root, node._root); - impl::node_copy_tree(n._root, proto._root); - - return n; - } - - PUGI__FN xml_node xml_node::append_move(const xml_node& moved) - { - if (!impl::allow_move(*this, moved)) return xml_node(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_node(); - - // disable document_buffer_order optimization since moving nodes around changes document order without changing buffer pointers - impl::get_document(_root).header |= impl::xml_memory_page_contents_shared_mask; - - impl::remove_node(moved._root); - impl::append_node(moved._root, _root); - - return moved; - } - - PUGI__FN xml_node xml_node::prepend_move(const xml_node& moved) - { - if (!impl::allow_move(*this, moved)) return xml_node(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_node(); - - // disable document_buffer_order optimization since moving nodes around changes document order without changing buffer pointers - impl::get_document(_root).header |= impl::xml_memory_page_contents_shared_mask; - - impl::remove_node(moved._root); - impl::prepend_node(moved._root, _root); - - return moved; - } - - PUGI__FN xml_node xml_node::insert_move_after(const xml_node& moved, const xml_node& node) - { - if (!impl::allow_move(*this, moved)) return xml_node(); - if (!node._root || node._root->parent != _root) return xml_node(); - if (moved._root == node._root) return xml_node(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_node(); - - // disable document_buffer_order optimization since moving nodes around changes document order without changing buffer pointers - impl::get_document(_root).header |= impl::xml_memory_page_contents_shared_mask; - - impl::remove_node(moved._root); - impl::insert_node_after(moved._root, node._root); - - return moved; - } - - PUGI__FN xml_node xml_node::insert_move_before(const xml_node& moved, const xml_node& node) - { - if (!impl::allow_move(*this, moved)) return xml_node(); - if (!node._root || node._root->parent != _root) return xml_node(); - if (moved._root == node._root) return xml_node(); - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return xml_node(); - - // disable document_buffer_order optimization since moving nodes around changes document order without changing buffer pointers - impl::get_document(_root).header |= impl::xml_memory_page_contents_shared_mask; - - impl::remove_node(moved._root); - impl::insert_node_before(moved._root, node._root); - - return moved; - } - - PUGI__FN bool xml_node::remove_attribute(const char_t* name_) - { - return remove_attribute(attribute(name_)); - } - - PUGI__FN bool xml_node::remove_attribute(const xml_attribute& a) - { - if (!_root || !a._attr) return false; - if (!impl::is_attribute_of(a._attr, _root)) return false; - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return false; - - impl::remove_attribute(a._attr, _root); - impl::destroy_attribute(a._attr, alloc); - - return true; - } - - PUGI__FN bool xml_node::remove_attributes() - { - if (!_root) return false; - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return false; - - for (xml_attribute_struct* attr = _root->first_attribute; attr; ) - { - xml_attribute_struct* next = attr->next_attribute; - - impl::destroy_attribute(attr, alloc); - - attr = next; - } - - _root->first_attribute = 0; - - return true; - } - - PUGI__FN bool xml_node::remove_child(const char_t* name_) - { - return remove_child(child(name_)); - } - - PUGI__FN bool xml_node::remove_child(const xml_node& n) - { - if (!_root || !n._root || n._root->parent != _root) return false; - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return false; - - impl::remove_node(n._root); - impl::destroy_node(n._root, alloc); - - return true; - } - - PUGI__FN bool xml_node::remove_children() - { - if (!_root) return false; - - impl::xml_allocator& alloc = impl::get_allocator(_root); - if (!alloc.reserve()) return false; - - for (xml_node_struct* cur = _root->first_child; cur; ) - { - xml_node_struct* next = cur->next_sibling; - - impl::destroy_node(cur, alloc); - - cur = next; - } - - _root->first_child = 0; - - return true; - } - - PUGI__FN xml_parse_result xml_node::append_buffer(const void* contents, size_t size, unsigned int options, xml_encoding encoding) - { - // append_buffer is only valid for elements/documents - if (!impl::allow_insert_child(type(), node_element)) return impl::make_parse_result(status_append_invalid_root); - - // get document node - impl::xml_document_struct* doc = &impl::get_document(_root); - - // disable document_buffer_order optimization since in a document with multiple buffers comparing buffer pointers does not make sense - doc->header |= impl::xml_memory_page_contents_shared_mask; - - // get extra buffer element (we'll store the document fragment buffer there so that we can deallocate it later) - impl::xml_memory_page* page = 0; - impl::xml_extra_buffer* extra = static_cast<impl::xml_extra_buffer*>(doc->allocate_memory(sizeof(impl::xml_extra_buffer) + sizeof(void*), page)); - (void)page; - - if (!extra) return impl::make_parse_result(status_out_of_memory); - - #ifdef PUGIXML_COMPACT - // align the memory block to a pointer boundary; this is required for compact mode where memory allocations are only 4b aligned - // note that this requires up to sizeof(void*)-1 additional memory, which the allocation above takes into account - extra = reinterpret_cast<impl::xml_extra_buffer*>((reinterpret_cast<uintptr_t>(extra) + (sizeof(void*) - 1)) & ~(sizeof(void*) - 1)); - #endif - - // add extra buffer to the list - extra->buffer = 0; - extra->next = doc->extra_buffers; - doc->extra_buffers = extra; - - // name of the root has to be NULL before parsing - otherwise closing node mismatches will not be detected at the top level - impl::name_null_sentry sentry(_root); - - return impl::load_buffer_impl(doc, _root, const_cast<void*>(contents), size, options, encoding, false, false, &extra->buffer); - } - - PUGI__FN xml_node xml_node::find_child_by_attribute(const char_t* name_, const char_t* attr_name, const char_t* attr_value) const - { - if (!_root) return xml_node(); - - for (xml_node_struct* i = _root->first_child; i; i = i->next_sibling) - if (i->name && impl::strequal(name_, i->name)) - { - for (xml_attribute_struct* a = i->first_attribute; a; a = a->next_attribute) - if (a->name && impl::strequal(attr_name, a->name) && impl::strequal(attr_value, a->value ? a->value + 0 : PUGIXML_TEXT(""))) - return xml_node(i); - } - - return xml_node(); - } - - PUGI__FN xml_node xml_node::find_child_by_attribute(const char_t* attr_name, const char_t* attr_value) const - { - if (!_root) return xml_node(); - - for (xml_node_struct* i = _root->first_child; i; i = i->next_sibling) - for (xml_attribute_struct* a = i->first_attribute; a; a = a->next_attribute) - if (a->name && impl::strequal(attr_name, a->name) && impl::strequal(attr_value, a->value ? a->value + 0 : PUGIXML_TEXT(""))) - return xml_node(i); - - return xml_node(); - } - -#ifndef PUGIXML_NO_STL - PUGI__FN string_t xml_node::path(char_t delimiter) const - { - if (!_root) return string_t(); - - size_t offset = 0; - - for (xml_node_struct* i = _root; i; i = i->parent) - { - offset += (i != _root); - offset += i->name ? impl::strlength(i->name) : 0; - } - - string_t result; - result.resize(offset); - - for (xml_node_struct* j = _root; j; j = j->parent) - { - if (j != _root) - result[--offset] = delimiter; - - if (j->name) - { - size_t length = impl::strlength(j->name); - - offset -= length; - memcpy(&result[offset], j->name, length * sizeof(char_t)); - } - } - - assert(offset == 0); - - return result; - } -#endif - - PUGI__FN xml_node xml_node::first_element_by_path(const char_t* path_, char_t delimiter) const - { - xml_node context = path_[0] == delimiter ? root() : *this; - - if (!context._root) return xml_node(); - - const char_t* path_segment = path_; - - while (*path_segment == delimiter) ++path_segment; - - const char_t* path_segment_end = path_segment; - - while (*path_segment_end && *path_segment_end != delimiter) ++path_segment_end; - - if (path_segment == path_segment_end) return context; - - const char_t* next_segment = path_segment_end; - - while (*next_segment == delimiter) ++next_segment; - - if (*path_segment == '.' && path_segment + 1 == path_segment_end) - return context.first_element_by_path(next_segment, delimiter); - else if (*path_segment == '.' && *(path_segment+1) == '.' && path_segment + 2 == path_segment_end) - return context.parent().first_element_by_path(next_segment, delimiter); - else - { - for (xml_node_struct* j = context._root->first_child; j; j = j->next_sibling) - { - if (j->name && impl::strequalrange(j->name, path_segment, static_cast<size_t>(path_segment_end - path_segment))) - { - xml_node subsearch = xml_node(j).first_element_by_path(next_segment, delimiter); - - if (subsearch) return subsearch; - } - } - - return xml_node(); - } - } - - PUGI__FN bool xml_node::traverse(xml_tree_walker& walker) - { - walker._depth = -1; - - xml_node arg_begin(_root); - if (!walker.begin(arg_begin)) return false; - - xml_node_struct* cur = _root ? _root->first_child + 0 : 0; - - if (cur) - { - ++walker._depth; - - do - { - xml_node arg_for_each(cur); - if (!walker.for_each(arg_for_each)) - return false; - - if (cur->first_child) - { - ++walker._depth; - cur = cur->first_child; - } - else if (cur->next_sibling) - cur = cur->next_sibling; - else - { - while (!cur->next_sibling && cur != _root && cur->parent) - { - --walker._depth; - cur = cur->parent; - } - - if (cur != _root) - cur = cur->next_sibling; - } - } - while (cur && cur != _root); - } - - assert(walker._depth == -1); - - xml_node arg_end(_root); - return walker.end(arg_end); - } - - PUGI__FN size_t xml_node::hash_value() const - { - return static_cast<size_t>(reinterpret_cast<uintptr_t>(_root) / sizeof(xml_node_struct)); - } - - PUGI__FN xml_node_struct* xml_node::internal_object() const - { - return _root; - } - - PUGI__FN void xml_node::print(xml_writer& writer, const char_t* indent, unsigned int flags, xml_encoding encoding, unsigned int depth) const - { - if (!_root) return; - - impl::xml_buffered_writer buffered_writer(writer, encoding); - - impl::node_output(buffered_writer, _root, indent, flags, depth); - - buffered_writer.flush(); - } - -#ifndef PUGIXML_NO_STL - PUGI__FN void xml_node::print(std::basic_ostream<char, std::char_traits<char> >& stream, const char_t* indent, unsigned int flags, xml_encoding encoding, unsigned int depth) const - { - xml_writer_stream writer(stream); - - print(writer, indent, flags, encoding, depth); - } - - PUGI__FN void xml_node::print(std::basic_ostream<wchar_t, std::char_traits<wchar_t> >& stream, const char_t* indent, unsigned int flags, unsigned int depth) const - { - xml_writer_stream writer(stream); - - print(writer, indent, flags, encoding_wchar, depth); - } -#endif - - PUGI__FN ptrdiff_t xml_node::offset_debug() const - { - if (!_root) return -1; - - impl::xml_document_struct& doc = impl::get_document(_root); - - // we can determine the offset reliably only if there is exactly once parse buffer - if (!doc.buffer || doc.extra_buffers) return -1; - - switch (type()) - { - case node_document: - return 0; - - case node_element: - case node_declaration: - case node_pi: - return _root->name && (_root->header & impl::xml_memory_page_name_allocated_or_shared_mask) == 0 ? _root->name - doc.buffer : -1; - - case node_pcdata: - case node_cdata: - case node_comment: - case node_doctype: - return _root->value && (_root->header & impl::xml_memory_page_value_allocated_or_shared_mask) == 0 ? _root->value - doc.buffer : -1; - - default: - assert(false && "Invalid node type"); // unreachable - return -1; - } - } - -#ifdef __BORLANDC__ - PUGI__FN bool operator&&(const xml_node& lhs, bool rhs) - { - return (bool)lhs && rhs; - } - - PUGI__FN bool operator||(const xml_node& lhs, bool rhs) - { - return (bool)lhs || rhs; - } -#endif - - PUGI__FN xml_text::xml_text(xml_node_struct* root): _root(root) - { - } - - PUGI__FN xml_node_struct* xml_text::_data() const - { - if (!_root || impl::is_text_node(_root)) return _root; - - // element nodes can have value if parse_embed_pcdata was used - if (PUGI__NODETYPE(_root) == node_element && _root->value) - return _root; - - for (xml_node_struct* node = _root->first_child; node; node = node->next_sibling) - if (impl::is_text_node(node)) - return node; - - return 0; - } - - PUGI__FN xml_node_struct* xml_text::_data_new() - { - xml_node_struct* d = _data(); - if (d) return d; - - return xml_node(_root).append_child(node_pcdata).internal_object(); - } - - PUGI__FN xml_text::xml_text(): _root(0) - { - } - - PUGI__FN static void unspecified_bool_xml_text(xml_text***) - { - } - - PUGI__FN xml_text::operator xml_text::unspecified_bool_type() const - { - return _data() ? unspecified_bool_xml_text : 0; - } - - PUGI__FN bool xml_text::operator!() const - { - return !_data(); - } - - PUGI__FN bool xml_text::empty() const - { - return _data() == 0; - } - - PUGI__FN const char_t* xml_text::get() const - { - xml_node_struct* d = _data(); - - return (d && d->value) ? d->value + 0 : PUGIXML_TEXT(""); - } - - PUGI__FN const char_t* xml_text::as_string(const char_t* def) const - { - xml_node_struct* d = _data(); - - return (d && d->value) ? d->value + 0 : def; - } - - PUGI__FN int xml_text::as_int(int def) const - { - xml_node_struct* d = _data(); - - return (d && d->value) ? impl::get_value_int(d->value) : def; - } - - PUGI__FN unsigned int xml_text::as_uint(unsigned int def) const - { - xml_node_struct* d = _data(); - - return (d && d->value) ? impl::get_value_uint(d->value) : def; - } - - PUGI__FN double xml_text::as_double(double def) const - { - xml_node_struct* d = _data(); - - return (d && d->value) ? impl::get_value_double(d->value) : def; - } - - PUGI__FN float xml_text::as_float(float def) const - { - xml_node_struct* d = _data(); - - return (d && d->value) ? impl::get_value_float(d->value) : def; - } - - PUGI__FN bool xml_text::as_bool(bool def) const - { - xml_node_struct* d = _data(); - - return (d && d->value) ? impl::get_value_bool(d->value) : def; - } - -#ifdef PUGIXML_HAS_LONG_LONG - PUGI__FN long long xml_text::as_llong(long long def) const - { - xml_node_struct* d = _data(); - - return (d && d->value) ? impl::get_value_llong(d->value) : def; - } - - PUGI__FN unsigned long long xml_text::as_ullong(unsigned long long def) const - { - xml_node_struct* d = _data(); - - return (d && d->value) ? impl::get_value_ullong(d->value) : def; - } -#endif - - PUGI__FN bool xml_text::set(const char_t* rhs) - { - xml_node_struct* dn = _data_new(); - - return dn ? impl::strcpy_insitu(dn->value, dn->header, impl::xml_memory_page_value_allocated_mask, rhs, impl::strlength(rhs)) : false; - } - - PUGI__FN bool xml_text::set(int rhs) - { - xml_node_struct* dn = _data_new(); - - return dn ? impl::set_value_integer<unsigned int>(dn->value, dn->header, impl::xml_memory_page_value_allocated_mask, rhs, rhs < 0) : false; - } - - PUGI__FN bool xml_text::set(unsigned int rhs) - { - xml_node_struct* dn = _data_new(); - - return dn ? impl::set_value_integer<unsigned int>(dn->value, dn->header, impl::xml_memory_page_value_allocated_mask, rhs, false) : false; - } - - PUGI__FN bool xml_text::set(long rhs) - { - xml_node_struct* dn = _data_new(); - - return dn ? impl::set_value_integer<unsigned long>(dn->value, dn->header, impl::xml_memory_page_value_allocated_mask, rhs, rhs < 0) : false; - } - - PUGI__FN bool xml_text::set(unsigned long rhs) - { - xml_node_struct* dn = _data_new(); - - return dn ? impl::set_value_integer<unsigned long>(dn->value, dn->header, impl::xml_memory_page_value_allocated_mask, rhs, false) : false; - } - - PUGI__FN bool xml_text::set(float rhs) - { - xml_node_struct* dn = _data_new(); - - return dn ? impl::set_value_convert(dn->value, dn->header, impl::xml_memory_page_value_allocated_mask, rhs, default_float_precision) : false; - } - - PUGI__FN bool xml_text::set(float rhs, int precision) - { - xml_node_struct* dn = _data_new(); - - return dn ? impl::set_value_convert(dn->value, dn->header, impl::xml_memory_page_value_allocated_mask, rhs, precision) : false; - } - - PUGI__FN bool xml_text::set(double rhs) - { - xml_node_struct* dn = _data_new(); - - return dn ? impl::set_value_convert(dn->value, dn->header, impl::xml_memory_page_value_allocated_mask, rhs, default_double_precision) : false; - } - - PUGI__FN bool xml_text::set(double rhs, int precision) - { - xml_node_struct* dn = _data_new(); - - return dn ? impl::set_value_convert(dn->value, dn->header, impl::xml_memory_page_value_allocated_mask, rhs, precision) : false; - } - - PUGI__FN bool xml_text::set(bool rhs) - { - xml_node_struct* dn = _data_new(); - - return dn ? impl::set_value_bool(dn->value, dn->header, impl::xml_memory_page_value_allocated_mask, rhs) : false; - } - -#ifdef PUGIXML_HAS_LONG_LONG - PUGI__FN bool xml_text::set(long long rhs) - { - xml_node_struct* dn = _data_new(); - - return dn ? impl::set_value_integer<unsigned long long>(dn->value, dn->header, impl::xml_memory_page_value_allocated_mask, rhs, rhs < 0) : false; - } - - PUGI__FN bool xml_text::set(unsigned long long rhs) - { - xml_node_struct* dn = _data_new(); - - return dn ? impl::set_value_integer<unsigned long long>(dn->value, dn->header, impl::xml_memory_page_value_allocated_mask, rhs, false) : false; - } -#endif - - PUGI__FN xml_text& xml_text::operator=(const char_t* rhs) - { - set(rhs); - return *this; - } - - PUGI__FN xml_text& xml_text::operator=(int rhs) - { - set(rhs); - return *this; - } - - PUGI__FN xml_text& xml_text::operator=(unsigned int rhs) - { - set(rhs); - return *this; - } - - PUGI__FN xml_text& xml_text::operator=(long rhs) - { - set(rhs); - return *this; - } - - PUGI__FN xml_text& xml_text::operator=(unsigned long rhs) - { - set(rhs); - return *this; - } - - PUGI__FN xml_text& xml_text::operator=(double rhs) - { - set(rhs); - return *this; - } - - PUGI__FN xml_text& xml_text::operator=(float rhs) - { - set(rhs); - return *this; - } - - PUGI__FN xml_text& xml_text::operator=(bool rhs) - { - set(rhs); - return *this; - } - -#ifdef PUGIXML_HAS_LONG_LONG - PUGI__FN xml_text& xml_text::operator=(long long rhs) - { - set(rhs); - return *this; - } - - PUGI__FN xml_text& xml_text::operator=(unsigned long long rhs) - { - set(rhs); - return *this; - } -#endif - - PUGI__FN xml_node xml_text::data() const - { - return xml_node(_data()); - } - -#ifdef __BORLANDC__ - PUGI__FN bool operator&&(const xml_text& lhs, bool rhs) - { - return (bool)lhs && rhs; - } - - PUGI__FN bool operator||(const xml_text& lhs, bool rhs) - { - return (bool)lhs || rhs; - } -#endif - - PUGI__FN xml_node_iterator::xml_node_iterator() - { - } - - PUGI__FN xml_node_iterator::xml_node_iterator(const xml_node& node): _wrap(node), _parent(node.parent()) - { - } - - PUGI__FN xml_node_iterator::xml_node_iterator(xml_node_struct* ref, xml_node_struct* parent): _wrap(ref), _parent(parent) - { - } - - PUGI__FN bool xml_node_iterator::operator==(const xml_node_iterator& rhs) const - { - return _wrap._root == rhs._wrap._root && _parent._root == rhs._parent._root; - } - - PUGI__FN bool xml_node_iterator::operator!=(const xml_node_iterator& rhs) const - { - return _wrap._root != rhs._wrap._root || _parent._root != rhs._parent._root; - } - - PUGI__FN xml_node& xml_node_iterator::operator*() const - { - assert(_wrap._root); - return _wrap; - } - - PUGI__FN xml_node* xml_node_iterator::operator->() const - { - assert(_wrap._root); - return const_cast<xml_node*>(&_wrap); // BCC5 workaround - } - - PUGI__FN const xml_node_iterator& xml_node_iterator::operator++() - { - assert(_wrap._root); - _wrap._root = _wrap._root->next_sibling; - return *this; - } - - PUGI__FN xml_node_iterator xml_node_iterator::operator++(int) - { - xml_node_iterator temp = *this; - ++*this; - return temp; - } - - PUGI__FN const xml_node_iterator& xml_node_iterator::operator--() - { - _wrap = _wrap._root ? _wrap.previous_sibling() : _parent.last_child(); - return *this; - } - - PUGI__FN xml_node_iterator xml_node_iterator::operator--(int) - { - xml_node_iterator temp = *this; - --*this; - return temp; - } - - PUGI__FN xml_attribute_iterator::xml_attribute_iterator() - { - } - - PUGI__FN xml_attribute_iterator::xml_attribute_iterator(const xml_attribute& attr, const xml_node& parent): _wrap(attr), _parent(parent) - { - } - - PUGI__FN xml_attribute_iterator::xml_attribute_iterator(xml_attribute_struct* ref, xml_node_struct* parent): _wrap(ref), _parent(parent) - { - } - - PUGI__FN bool xml_attribute_iterator::operator==(const xml_attribute_iterator& rhs) const - { - return _wrap._attr == rhs._wrap._attr && _parent._root == rhs._parent._root; - } - - PUGI__FN bool xml_attribute_iterator::operator!=(const xml_attribute_iterator& rhs) const - { - return _wrap._attr != rhs._wrap._attr || _parent._root != rhs._parent._root; - } - - PUGI__FN xml_attribute& xml_attribute_iterator::operator*() const - { - assert(_wrap._attr); - return _wrap; - } - - PUGI__FN xml_attribute* xml_attribute_iterator::operator->() const - { - assert(_wrap._attr); - return const_cast<xml_attribute*>(&_wrap); // BCC5 workaround - } - - PUGI__FN const xml_attribute_iterator& xml_attribute_iterator::operator++() - { - assert(_wrap._attr); - _wrap._attr = _wrap._attr->next_attribute; - return *this; - } - - PUGI__FN xml_attribute_iterator xml_attribute_iterator::operator++(int) - { - xml_attribute_iterator temp = *this; - ++*this; - return temp; - } - - PUGI__FN const xml_attribute_iterator& xml_attribute_iterator::operator--() - { - _wrap = _wrap._attr ? _wrap.previous_attribute() : _parent.last_attribute(); - return *this; - } - - PUGI__FN xml_attribute_iterator xml_attribute_iterator::operator--(int) - { - xml_attribute_iterator temp = *this; - --*this; - return temp; - } - - PUGI__FN xml_named_node_iterator::xml_named_node_iterator(): _name(0) - { - } - - PUGI__FN xml_named_node_iterator::xml_named_node_iterator(const xml_node& node, const char_t* name): _wrap(node), _parent(node.parent()), _name(name) - { - } - - PUGI__FN xml_named_node_iterator::xml_named_node_iterator(xml_node_struct* ref, xml_node_struct* parent, const char_t* name): _wrap(ref), _parent(parent), _name(name) - { - } - - PUGI__FN bool xml_named_node_iterator::operator==(const xml_named_node_iterator& rhs) const - { - return _wrap._root == rhs._wrap._root && _parent._root == rhs._parent._root; - } - - PUGI__FN bool xml_named_node_iterator::operator!=(const xml_named_node_iterator& rhs) const - { - return _wrap._root != rhs._wrap._root || _parent._root != rhs._parent._root; - } - - PUGI__FN xml_node& xml_named_node_iterator::operator*() const - { - assert(_wrap._root); - return _wrap; - } - - PUGI__FN xml_node* xml_named_node_iterator::operator->() const - { - assert(_wrap._root); - return const_cast<xml_node*>(&_wrap); // BCC5 workaround - } - - PUGI__FN const xml_named_node_iterator& xml_named_node_iterator::operator++() - { - assert(_wrap._root); - _wrap = _wrap.next_sibling(_name); - return *this; - } - - PUGI__FN xml_named_node_iterator xml_named_node_iterator::operator++(int) - { - xml_named_node_iterator temp = *this; - ++*this; - return temp; - } - - PUGI__FN const xml_named_node_iterator& xml_named_node_iterator::operator--() - { - if (_wrap._root) - _wrap = _wrap.previous_sibling(_name); - else - { - _wrap = _parent.last_child(); - - if (!impl::strequal(_wrap.name(), _name)) - _wrap = _wrap.previous_sibling(_name); - } - - return *this; - } - - PUGI__FN xml_named_node_iterator xml_named_node_iterator::operator--(int) - { - xml_named_node_iterator temp = *this; - --*this; - return temp; - } - - PUGI__FN xml_parse_result::xml_parse_result(): status(status_internal_error), offset(0), encoding(encoding_auto) - { - } - - PUGI__FN xml_parse_result::operator bool() const - { - return status == status_ok; - } - - PUGI__FN const char* xml_parse_result::description() const - { - switch (status) - { - case status_ok: return "No error"; - - case status_file_not_found: return "File was not found"; - case status_io_error: return "Error reading from file/stream"; - case status_out_of_memory: return "Could not allocate memory"; - case status_internal_error: return "Internal error occurred"; - - case status_unrecognized_tag: return "Could not determine tag type"; - - case status_bad_pi: return "Error parsing document declaration/processing instruction"; - case status_bad_comment: return "Error parsing comment"; - case status_bad_cdata: return "Error parsing CDATA section"; - case status_bad_doctype: return "Error parsing document type declaration"; - case status_bad_pcdata: return "Error parsing PCDATA section"; - case status_bad_start_element: return "Error parsing start element tag"; - case status_bad_attribute: return "Error parsing element attribute"; - case status_bad_end_element: return "Error parsing end element tag"; - case status_end_element_mismatch: return "Start-end tags mismatch"; - - case status_append_invalid_root: return "Unable to append nodes: root is not an element or document"; - - case status_no_document_element: return "No document element found"; - - default: return "Unknown error"; - } - } - - PUGI__FN xml_document::xml_document(): _buffer(0) - { - _create(); - } - - PUGI__FN xml_document::~xml_document() - { - _destroy(); - } - -#ifdef PUGIXML_HAS_MOVE - PUGI__FN xml_document::xml_document(xml_document&& rhs) PUGIXML_NOEXCEPT_IF_NOT_COMPACT: _buffer(0) - { - _create(); - _move(rhs); - } - - PUGI__FN xml_document& xml_document::operator=(xml_document&& rhs) PUGIXML_NOEXCEPT_IF_NOT_COMPACT - { - if (this == &rhs) return *this; - - _destroy(); - _create(); - _move(rhs); - - return *this; - } -#endif - - PUGI__FN void xml_document::reset() - { - _destroy(); - _create(); - } - - PUGI__FN void xml_document::reset(const xml_document& proto) - { - reset(); - - impl::node_copy_tree(_root, proto._root); - } - - PUGI__FN void xml_document::_create() - { - assert(!_root); - - #ifdef PUGIXML_COMPACT - // space for page marker for the first page (uint32_t), rounded up to pointer size; assumes pointers are at least 32-bit - const size_t page_offset = sizeof(void*); - #else - const size_t page_offset = 0; - #endif - - // initialize sentinel page - PUGI__STATIC_ASSERT(sizeof(impl::xml_memory_page) + sizeof(impl::xml_document_struct) + page_offset <= sizeof(_memory)); - - // prepare page structure - impl::xml_memory_page* page = impl::xml_memory_page::construct(_memory); - assert(page); - - page->busy_size = impl::xml_memory_page_size; - - // setup first page marker - #ifdef PUGIXML_COMPACT - // round-trip through void* to avoid 'cast increases required alignment of target type' warning - page->compact_page_marker = reinterpret_cast<uint32_t*>(static_cast<void*>(reinterpret_cast<char*>(page) + sizeof(impl::xml_memory_page))); - *page->compact_page_marker = sizeof(impl::xml_memory_page); - #endif - - // allocate new root - _root = new (reinterpret_cast<char*>(page) + sizeof(impl::xml_memory_page) + page_offset) impl::xml_document_struct(page); - _root->prev_sibling_c = _root; - - // setup sentinel page - page->allocator = static_cast<impl::xml_document_struct*>(_root); - - // setup hash table pointer in allocator - #ifdef PUGIXML_COMPACT - page->allocator->_hash = &static_cast<impl::xml_document_struct*>(_root)->hash; - #endif - - // verify the document allocation - assert(reinterpret_cast<char*>(_root) + sizeof(impl::xml_document_struct) <= _memory + sizeof(_memory)); - } - - PUGI__FN void xml_document::_destroy() - { - assert(_root); - - // destroy static storage - if (_buffer) - { - impl::xml_memory::deallocate(_buffer); - _buffer = 0; - } - - // destroy extra buffers (note: no need to destroy linked list nodes, they're allocated using document allocator) - for (impl::xml_extra_buffer* extra = static_cast<impl::xml_document_struct*>(_root)->extra_buffers; extra; extra = extra->next) - { - if (extra->buffer) impl::xml_memory::deallocate(extra->buffer); - } - - // destroy dynamic storage, leave sentinel page (it's in static memory) - impl::xml_memory_page* root_page = PUGI__GETPAGE(_root); - assert(root_page && !root_page->prev); - assert(reinterpret_cast<char*>(root_page) >= _memory && reinterpret_cast<char*>(root_page) < _memory + sizeof(_memory)); - - for (impl::xml_memory_page* page = root_page->next; page; ) - { - impl::xml_memory_page* next = page->next; - - impl::xml_allocator::deallocate_page(page); - - page = next; - } - - #ifdef PUGIXML_COMPACT - // destroy hash table - static_cast<impl::xml_document_struct*>(_root)->hash.clear(); - #endif - - _root = 0; - } - -#ifdef PUGIXML_HAS_MOVE - PUGI__FN void xml_document::_move(xml_document& rhs) PUGIXML_NOEXCEPT_IF_NOT_COMPACT - { - impl::xml_document_struct* doc = static_cast<impl::xml_document_struct*>(_root); - impl::xml_document_struct* other = static_cast<impl::xml_document_struct*>(rhs._root); - - // save first child pointer for later; this needs hash access - xml_node_struct* other_first_child = other->first_child; - - #ifdef PUGIXML_COMPACT - // reserve space for the hash table up front; this is the only operation that can fail - // if it does, we have no choice but to throw (if we have exceptions) - if (other_first_child) - { - size_t other_children = 0; - for (xml_node_struct* node = other_first_child; node; node = node->next_sibling) - other_children++; - - // in compact mode, each pointer assignment could result in a hash table request - // during move, we have to relocate document first_child and parents of all children - // normally there's just one child and its parent has a pointerless encoding but - // we assume the worst here - if (!other->_hash->reserve(other_children + 1)) - { - #ifdef PUGIXML_NO_EXCEPTIONS - return; - #else - throw std::bad_alloc(); - #endif - } - } - #endif - - // move allocation state - doc->_root = other->_root; - doc->_busy_size = other->_busy_size; - - // move buffer state - doc->buffer = other->buffer; - doc->extra_buffers = other->extra_buffers; - _buffer = rhs._buffer; - - #ifdef PUGIXML_COMPACT - // move compact hash; note that the hash table can have pointers to other but they will be "inactive", similarly to nodes removed with remove_child - doc->hash = other->hash; - doc->_hash = &doc->hash; - - // make sure we don't access other hash up until the end when we reinitialize other document - other->_hash = 0; - #endif - - // move page structure - impl::xml_memory_page* doc_page = PUGI__GETPAGE(doc); - assert(doc_page && !doc_page->prev && !doc_page->next); - - impl::xml_memory_page* other_page = PUGI__GETPAGE(other); - assert(other_page && !other_page->prev); - - // relink pages since root page is embedded into xml_document - if (impl::xml_memory_page* page = other_page->next) - { - assert(page->prev == other_page); - - page->prev = doc_page; - - doc_page->next = page; - other_page->next = 0; - } - - // make sure pages point to the correct document state - for (impl::xml_memory_page* page = doc_page->next; page; page = page->next) - { - assert(page->allocator == other); - - page->allocator = doc; - - #ifdef PUGIXML_COMPACT - // this automatically migrates most children between documents and prevents ->parent assignment from allocating - if (page->compact_shared_parent == other) - page->compact_shared_parent = doc; - #endif - } - - // move tree structure - assert(!doc->first_child); - - doc->first_child = other_first_child; - - for (xml_node_struct* node = other_first_child; node; node = node->next_sibling) - { - #ifdef PUGIXML_COMPACT - // most children will have migrated when we reassigned compact_shared_parent - assert(node->parent == other || node->parent == doc); - - node->parent = doc; - #else - assert(node->parent == other); - node->parent = doc; - #endif - } - - // reset other document - new (other) impl::xml_document_struct(PUGI__GETPAGE(other)); - rhs._buffer = 0; - } -#endif - -#ifndef PUGIXML_NO_STL - PUGI__FN xml_parse_result xml_document::load(std::basic_istream<char, std::char_traits<char> >& stream, unsigned int options, xml_encoding encoding) - { - reset(); - - return impl::load_stream_impl(static_cast<impl::xml_document_struct*>(_root), stream, options, encoding, &_buffer); - } - - PUGI__FN xml_parse_result xml_document::load(std::basic_istream<wchar_t, std::char_traits<wchar_t> >& stream, unsigned int options) - { - reset(); - - return impl::load_stream_impl(static_cast<impl::xml_document_struct*>(_root), stream, options, encoding_wchar, &_buffer); - } -#endif - - PUGI__FN xml_parse_result xml_document::load_string(const char_t* contents, unsigned int options) - { - // Force native encoding (skip autodetection) - #ifdef PUGIXML_WCHAR_MODE - xml_encoding encoding = encoding_wchar; - #else - xml_encoding encoding = encoding_utf8; - #endif - - return load_buffer(contents, impl::strlength(contents) * sizeof(char_t), options, encoding); - } - - PUGI__FN xml_parse_result xml_document::load(const char_t* contents, unsigned int options) - { - return load_string(contents, options); - } - - PUGI__FN xml_parse_result xml_document::load_file(const char* path_, unsigned int options, xml_encoding encoding) - { - reset(); - - using impl::auto_deleter; // MSVC7 workaround - auto_deleter<FILE> file(impl::open_file(path_, "rb"), impl::close_file); - - return impl::load_file_impl(static_cast<impl::xml_document_struct*>(_root), file.data, options, encoding, &_buffer); - } - - PUGI__FN xml_parse_result xml_document::load_file(const wchar_t* path_, unsigned int options, xml_encoding encoding) - { - reset(); - - using impl::auto_deleter; // MSVC7 workaround - auto_deleter<FILE> file(impl::open_file_wide(path_, L"rb"), impl::close_file); - - return impl::load_file_impl(static_cast<impl::xml_document_struct*>(_root), file.data, options, encoding, &_buffer); - } - - PUGI__FN xml_parse_result xml_document::load_buffer(const void* contents, size_t size, unsigned int options, xml_encoding encoding) - { - reset(); - - return impl::load_buffer_impl(static_cast<impl::xml_document_struct*>(_root), _root, const_cast<void*>(contents), size, options, encoding, false, false, &_buffer); - } - - PUGI__FN xml_parse_result xml_document::load_buffer_inplace(void* contents, size_t size, unsigned int options, xml_encoding encoding) - { - reset(); - - return impl::load_buffer_impl(static_cast<impl::xml_document_struct*>(_root), _root, contents, size, options, encoding, true, false, &_buffer); - } - - PUGI__FN xml_parse_result xml_document::load_buffer_inplace_own(void* contents, size_t size, unsigned int options, xml_encoding encoding) - { - reset(); - - return impl::load_buffer_impl(static_cast<impl::xml_document_struct*>(_root), _root, contents, size, options, encoding, true, true, &_buffer); - } - - PUGI__FN void xml_document::save(xml_writer& writer, const char_t* indent, unsigned int flags, xml_encoding encoding) const - { - impl::xml_buffered_writer buffered_writer(writer, encoding); - - if ((flags & format_write_bom) && encoding != encoding_latin1) - { - // BOM always represents the codepoint U+FEFF, so just write it in native encoding - #ifdef PUGIXML_WCHAR_MODE - unsigned int bom = 0xfeff; - buffered_writer.write(static_cast<wchar_t>(bom)); - #else - buffered_writer.write('\xef', '\xbb', '\xbf'); - #endif - } - - if (!(flags & format_no_declaration) && !impl::has_declaration(_root)) - { - buffered_writer.write_string(PUGIXML_TEXT("<?xml version=\"1.0\"")); - if (encoding == encoding_latin1) buffered_writer.write_string(PUGIXML_TEXT(" encoding=\"ISO-8859-1\"")); - buffered_writer.write('?', '>'); - if (!(flags & format_raw)) buffered_writer.write('\n'); - } - - impl::node_output(buffered_writer, _root, indent, flags, 0); - - buffered_writer.flush(); - } - -#ifndef PUGIXML_NO_STL - PUGI__FN void xml_document::save(std::basic_ostream<char, std::char_traits<char> >& stream, const char_t* indent, unsigned int flags, xml_encoding encoding) const - { - xml_writer_stream writer(stream); - - save(writer, indent, flags, encoding); - } - - PUGI__FN void xml_document::save(std::basic_ostream<wchar_t, std::char_traits<wchar_t> >& stream, const char_t* indent, unsigned int flags) const - { - xml_writer_stream writer(stream); - - save(writer, indent, flags, encoding_wchar); - } -#endif - - PUGI__FN bool xml_document::save_file(const char* path_, const char_t* indent, unsigned int flags, xml_encoding encoding) const - { - using impl::auto_deleter; // MSVC7 workaround - auto_deleter<FILE> file(impl::open_file(path_, (flags & format_save_file_text) ? "w" : "wb"), impl::close_file); - - return impl::save_file_impl(*this, file.data, indent, flags, encoding); - } - - PUGI__FN bool xml_document::save_file(const wchar_t* path_, const char_t* indent, unsigned int flags, xml_encoding encoding) const - { - using impl::auto_deleter; // MSVC7 workaround - auto_deleter<FILE> file(impl::open_file_wide(path_, (flags & format_save_file_text) ? L"w" : L"wb"), impl::close_file); - - return impl::save_file_impl(*this, file.data, indent, flags, encoding); - } - - PUGI__FN xml_node xml_document::document_element() const - { - assert(_root); - - for (xml_node_struct* i = _root->first_child; i; i = i->next_sibling) - if (PUGI__NODETYPE(i) == node_element) - return xml_node(i); - - return xml_node(); - } - -#ifndef PUGIXML_NO_STL - PUGI__FN std::string PUGIXML_FUNCTION as_utf8(const wchar_t* str) - { - assert(str); - - return impl::as_utf8_impl(str, impl::strlength_wide(str)); - } - - PUGI__FN std::string PUGIXML_FUNCTION as_utf8(const std::basic_string<wchar_t>& str) - { - return impl::as_utf8_impl(str.c_str(), str.size()); - } - - PUGI__FN std::basic_string<wchar_t> PUGIXML_FUNCTION as_wide(const char* str) - { - assert(str); - - return impl::as_wide_impl(str, strlen(str)); - } - - PUGI__FN std::basic_string<wchar_t> PUGIXML_FUNCTION as_wide(const std::string& str) - { - return impl::as_wide_impl(str.c_str(), str.size()); - } -#endif - - PUGI__FN void PUGIXML_FUNCTION set_memory_management_functions(allocation_function allocate, deallocation_function deallocate) - { - impl::xml_memory::allocate = allocate; - impl::xml_memory::deallocate = deallocate; - } - - PUGI__FN allocation_function PUGIXML_FUNCTION get_memory_allocation_function() - { - return impl::xml_memory::allocate; - } - - PUGI__FN deallocation_function PUGIXML_FUNCTION get_memory_deallocation_function() - { - return impl::xml_memory::deallocate; - } -} - -#if !defined(PUGIXML_NO_STL) && (defined(_MSC_VER) || defined(__ICC)) -namespace std -{ - // Workarounds for (non-standard) iterator category detection for older versions (MSVC7/IC8 and earlier) - PUGI__FN std::bidirectional_iterator_tag _Iter_cat(const pugi::xml_node_iterator&) - { - return std::bidirectional_iterator_tag(); - } - - PUGI__FN std::bidirectional_iterator_tag _Iter_cat(const pugi::xml_attribute_iterator&) - { - return std::bidirectional_iterator_tag(); - } - - PUGI__FN std::bidirectional_iterator_tag _Iter_cat(const pugi::xml_named_node_iterator&) - { - return std::bidirectional_iterator_tag(); - } -} -#endif - -#if !defined(PUGIXML_NO_STL) && defined(__SUNPRO_CC) -namespace std -{ - // Workarounds for (non-standard) iterator category detection - PUGI__FN std::bidirectional_iterator_tag __iterator_category(const pugi::xml_node_iterator&) - { - return std::bidirectional_iterator_tag(); - } - - PUGI__FN std::bidirectional_iterator_tag __iterator_category(const pugi::xml_attribute_iterator&) - { - return std::bidirectional_iterator_tag(); - } - - PUGI__FN std::bidirectional_iterator_tag __iterator_category(const pugi::xml_named_node_iterator&) - { - return std::bidirectional_iterator_tag(); - } -} -#endif - -#ifndef PUGIXML_NO_XPATH -// STL replacements -PUGI__NS_BEGIN - struct equal_to - { - template <typename T> bool operator()(const T& lhs, const T& rhs) const - { - return lhs == rhs; - } - }; - - struct not_equal_to - { - template <typename T> bool operator()(const T& lhs, const T& rhs) const - { - return lhs != rhs; - } - }; - - struct less - { - template <typename T> bool operator()(const T& lhs, const T& rhs) const - { - return lhs < rhs; - } - }; - - struct less_equal - { - template <typename T> bool operator()(const T& lhs, const T& rhs) const - { - return lhs <= rhs; - } - }; - - template <typename T> inline void swap(T& lhs, T& rhs) - { - T temp = lhs; - lhs = rhs; - rhs = temp; - } - - template <typename I, typename Pred> PUGI__FN I min_element(I begin, I end, const Pred& pred) - { - I result = begin; - - for (I it = begin + 1; it != end; ++it) - if (pred(*it, *result)) - result = it; - - return result; - } - - template <typename I> PUGI__FN void reverse(I begin, I end) - { - while (end - begin > 1) - swap(*begin++, *--end); - } - - template <typename I> PUGI__FN I unique(I begin, I end) - { - // fast skip head - while (end - begin > 1 && *begin != *(begin + 1)) - begin++; - - if (begin == end) - return begin; - - // last written element - I write = begin++; - - // merge unique elements - while (begin != end) - { - if (*begin != *write) - *++write = *begin++; - else - begin++; - } - - // past-the-end (write points to live element) - return write + 1; - } - - template <typename T, typename Pred> PUGI__FN void insertion_sort(T* begin, T* end, const Pred& pred) - { - if (begin == end) - return; - - for (T* it = begin + 1; it != end; ++it) - { - T val = *it; - T* hole = it; - - // move hole backwards - while (hole > begin && pred(val, *(hole - 1))) - { - *hole = *(hole - 1); - hole--; - } - - // fill hole with element - *hole = val; - } - } - - template <typename I, typename Pred> inline I median3(I first, I middle, I last, const Pred& pred) - { - if (pred(*middle, *first)) - swap(middle, first); - if (pred(*last, *middle)) - swap(last, middle); - if (pred(*middle, *first)) - swap(middle, first); - - return middle; - } - - template <typename T, typename Pred> PUGI__FN void partition3(T* begin, T* end, T pivot, const Pred& pred, T** out_eqbeg, T** out_eqend) - { - // invariant: array is split into 4 groups: = < ? > (each variable denotes the boundary between the groups) - T* eq = begin; - T* lt = begin; - T* gt = end; - - while (lt < gt) - { - if (pred(*lt, pivot)) - lt++; - else if (*lt == pivot) - swap(*eq++, *lt++); - else - swap(*lt, *--gt); - } - - // we now have just 4 groups: = < >; move equal elements to the middle - T* eqbeg = gt; - - for (T* it = begin; it != eq; ++it) - swap(*it, *--eqbeg); - - *out_eqbeg = eqbeg; - *out_eqend = gt; - } - - template <typename I, typename Pred> PUGI__FN void sort(I begin, I end, const Pred& pred) - { - // sort large chunks - while (end - begin > 16) - { - // find median element - I middle = begin + (end - begin) / 2; - I median = median3(begin, middle, end - 1, pred); - - // partition in three chunks (< = >) - I eqbeg, eqend; - partition3(begin, end, *median, pred, &eqbeg, &eqend); - - // loop on larger half - if (eqbeg - begin > end - eqend) - { - sort(eqend, end, pred); - end = eqbeg; - } - else - { - sort(begin, eqbeg, pred); - begin = eqend; - } - } - - // insertion sort small chunk - insertion_sort(begin, end, pred); - } - - PUGI__FN bool hash_insert(const void** table, size_t size, const void* key) - { - assert(key); - - unsigned int h = static_cast<unsigned int>(reinterpret_cast<uintptr_t>(key)); - - // MurmurHash3 32-bit finalizer - h ^= h >> 16; - h *= 0x85ebca6bu; - h ^= h >> 13; - h *= 0xc2b2ae35u; - h ^= h >> 16; - - size_t hashmod = size - 1; - size_t bucket = h & hashmod; - - for (size_t probe = 0; probe <= hashmod; ++probe) - { - if (table[bucket] == 0) - { - table[bucket] = key; - return true; - } - - if (table[bucket] == key) - return false; - - // hash collision, quadratic probing - bucket = (bucket + probe + 1) & hashmod; - } - - assert(false && "Hash table is full"); // unreachable - return false; - } -PUGI__NS_END - -// Allocator used for AST and evaluation stacks -PUGI__NS_BEGIN - static const size_t xpath_memory_page_size = - #ifdef PUGIXML_MEMORY_XPATH_PAGE_SIZE - PUGIXML_MEMORY_XPATH_PAGE_SIZE - #else - 4096 - #endif - ; - - static const uintptr_t xpath_memory_block_alignment = sizeof(double) > sizeof(void*) ? sizeof(double) : sizeof(void*); - - struct xpath_memory_block - { - xpath_memory_block* next; - size_t capacity; - - union - { - char data[xpath_memory_page_size]; - double alignment; - }; - }; - - struct xpath_allocator - { - xpath_memory_block* _root; - size_t _root_size; - bool* _error; - - xpath_allocator(xpath_memory_block* root, bool* error = 0): _root(root), _root_size(0), _error(error) - { - } - - void* allocate(size_t size) - { - // round size up to block alignment boundary - size = (size + xpath_memory_block_alignment - 1) & ~(xpath_memory_block_alignment - 1); - - if (_root_size + size <= _root->capacity) - { - void* buf = &_root->data[0] + _root_size; - _root_size += size; - return buf; - } - else - { - // make sure we have at least 1/4th of the page free after allocation to satisfy subsequent allocation requests - size_t block_capacity_base = sizeof(_root->data); - size_t block_capacity_req = size + block_capacity_base / 4; - size_t block_capacity = (block_capacity_base > block_capacity_req) ? block_capacity_base : block_capacity_req; - - size_t block_size = block_capacity + offsetof(xpath_memory_block, data); - - xpath_memory_block* block = static_cast<xpath_memory_block*>(xml_memory::allocate(block_size)); - if (!block) - { - if (_error) *_error = true; - return 0; - } - - block->next = _root; - block->capacity = block_capacity; - - _root = block; - _root_size = size; - - return block->data; - } - } - - void* reallocate(void* ptr, size_t old_size, size_t new_size) - { - // round size up to block alignment boundary - old_size = (old_size + xpath_memory_block_alignment - 1) & ~(xpath_memory_block_alignment - 1); - new_size = (new_size + xpath_memory_block_alignment - 1) & ~(xpath_memory_block_alignment - 1); - - // we can only reallocate the last object - assert(ptr == 0 || static_cast<char*>(ptr) + old_size == &_root->data[0] + _root_size); - - // try to reallocate the object inplace - if (ptr && _root_size - old_size + new_size <= _root->capacity) - { - _root_size = _root_size - old_size + new_size; - return ptr; - } - - // allocate a new block - void* result = allocate(new_size); - if (!result) return 0; - - // we have a new block - if (ptr) - { - // copy old data (we only support growing) - assert(new_size >= old_size); - memcpy(result, ptr, old_size); - - // free the previous page if it had no other objects - assert(_root->data == result); - assert(_root->next); - - if (_root->next->data == ptr) - { - // deallocate the whole page, unless it was the first one - xpath_memory_block* next = _root->next->next; - - if (next) - { - xml_memory::deallocate(_root->next); - _root->next = next; - } - } - } - - return result; - } - - void revert(const xpath_allocator& state) - { - // free all new pages - xpath_memory_block* cur = _root; - - while (cur != state._root) - { - xpath_memory_block* next = cur->next; - - xml_memory::deallocate(cur); - - cur = next; - } - - // restore state - _root = state._root; - _root_size = state._root_size; - } - - void release() - { - xpath_memory_block* cur = _root; - assert(cur); - - while (cur->next) - { - xpath_memory_block* next = cur->next; - - xml_memory::deallocate(cur); - - cur = next; - } - } - }; - - struct xpath_allocator_capture - { - xpath_allocator_capture(xpath_allocator* alloc): _target(alloc), _state(*alloc) - { - } - - ~xpath_allocator_capture() - { - _target->revert(_state); - } - - xpath_allocator* _target; - xpath_allocator _state; - }; - - struct xpath_stack - { - xpath_allocator* result; - xpath_allocator* temp; - }; - - struct xpath_stack_data - { - xpath_memory_block blocks[2]; - xpath_allocator result; - xpath_allocator temp; - xpath_stack stack; - bool oom; - - xpath_stack_data(): result(blocks + 0, &oom), temp(blocks + 1, &oom), oom(false) - { - blocks[0].next = blocks[1].next = 0; - blocks[0].capacity = blocks[1].capacity = sizeof(blocks[0].data); - - stack.result = &result; - stack.temp = &temp; - } - - ~xpath_stack_data() - { - result.release(); - temp.release(); - } - }; -PUGI__NS_END - -// String class -PUGI__NS_BEGIN - class xpath_string - { - const char_t* _buffer; - bool _uses_heap; - size_t _length_heap; - - static char_t* duplicate_string(const char_t* string, size_t length, xpath_allocator* alloc) - { - char_t* result = static_cast<char_t*>(alloc->allocate((length + 1) * sizeof(char_t))); - if (!result) return 0; - - memcpy(result, string, length * sizeof(char_t)); - result[length] = 0; - - return result; - } - - xpath_string(const char_t* buffer, bool uses_heap_, size_t length_heap): _buffer(buffer), _uses_heap(uses_heap_), _length_heap(length_heap) - { - } - - public: - static xpath_string from_const(const char_t* str) - { - return xpath_string(str, false, 0); - } - - static xpath_string from_heap_preallocated(const char_t* begin, const char_t* end) - { - assert(begin <= end && *end == 0); - - return xpath_string(begin, true, static_cast<size_t>(end - begin)); - } - - static xpath_string from_heap(const char_t* begin, const char_t* end, xpath_allocator* alloc) - { - assert(begin <= end); - - if (begin == end) - return xpath_string(); - - size_t length = static_cast<size_t>(end - begin); - const char_t* data = duplicate_string(begin, length, alloc); - - return data ? xpath_string(data, true, length) : xpath_string(); - } - - xpath_string(): _buffer(PUGIXML_TEXT("")), _uses_heap(false), _length_heap(0) - { - } - - void append(const xpath_string& o, xpath_allocator* alloc) - { - // skip empty sources - if (!*o._buffer) return; - - // fast append for constant empty target and constant source - if (!*_buffer && !_uses_heap && !o._uses_heap) - { - _buffer = o._buffer; - } - else - { - // need to make heap copy - size_t target_length = length(); - size_t source_length = o.length(); - size_t result_length = target_length + source_length; - - // allocate new buffer - char_t* result = static_cast<char_t*>(alloc->reallocate(_uses_heap ? const_cast<char_t*>(_buffer) : 0, (target_length + 1) * sizeof(char_t), (result_length + 1) * sizeof(char_t))); - if (!result) return; - - // append first string to the new buffer in case there was no reallocation - if (!_uses_heap) memcpy(result, _buffer, target_length * sizeof(char_t)); - - // append second string to the new buffer - memcpy(result + target_length, o._buffer, source_length * sizeof(char_t)); - result[result_length] = 0; - - // finalize - _buffer = result; - _uses_heap = true; - _length_heap = result_length; - } - } - - const char_t* c_str() const - { - return _buffer; - } - - size_t length() const - { - return _uses_heap ? _length_heap : strlength(_buffer); - } - - char_t* data(xpath_allocator* alloc) - { - // make private heap copy - if (!_uses_heap) - { - size_t length_ = strlength(_buffer); - const char_t* data_ = duplicate_string(_buffer, length_, alloc); - - if (!data_) return 0; - - _buffer = data_; - _uses_heap = true; - _length_heap = length_; - } - - return const_cast<char_t*>(_buffer); - } - - bool empty() const - { - return *_buffer == 0; - } - - bool operator==(const xpath_string& o) const - { - return strequal(_buffer, o._buffer); - } - - bool operator!=(const xpath_string& o) const - { - return !strequal(_buffer, o._buffer); - } - - bool uses_heap() const - { - return _uses_heap; - } - }; -PUGI__NS_END - -PUGI__NS_BEGIN - PUGI__FN bool starts_with(const char_t* string, const char_t* pattern) - { - while (*pattern && *string == *pattern) - { - string++; - pattern++; - } - - return *pattern == 0; - } - - PUGI__FN const char_t* find_char(const char_t* s, char_t c) - { - #ifdef PUGIXML_WCHAR_MODE - return wcschr(s, c); - #else - return strchr(s, c); - #endif - } - - PUGI__FN const char_t* find_substring(const char_t* s, const char_t* p) - { - #ifdef PUGIXML_WCHAR_MODE - // MSVC6 wcsstr bug workaround (if s is empty it always returns 0) - return (*p == 0) ? s : wcsstr(s, p); - #else - return strstr(s, p); - #endif - } - - // Converts symbol to lower case, if it is an ASCII one - PUGI__FN char_t tolower_ascii(char_t ch) - { - return static_cast<unsigned int>(ch - 'A') < 26 ? static_cast<char_t>(ch | ' ') : ch; - } - - PUGI__FN xpath_string string_value(const xpath_node& na, xpath_allocator* alloc) - { - if (na.attribute()) - return xpath_string::from_const(na.attribute().value()); - else - { - xml_node n = na.node(); - - switch (n.type()) - { - case node_pcdata: - case node_cdata: - case node_comment: - case node_pi: - return xpath_string::from_const(n.value()); - - case node_document: - case node_element: - { - xpath_string result; - - // element nodes can have value if parse_embed_pcdata was used - if (n.value()[0]) - result.append(xpath_string::from_const(n.value()), alloc); - - xml_node cur = n.first_child(); - - while (cur && cur != n) - { - if (cur.type() == node_pcdata || cur.type() == node_cdata) - result.append(xpath_string::from_const(cur.value()), alloc); - - if (cur.first_child()) - cur = cur.first_child(); - else if (cur.next_sibling()) - cur = cur.next_sibling(); - else - { - while (!cur.next_sibling() && cur != n) - cur = cur.parent(); - - if (cur != n) cur = cur.next_sibling(); - } - } - - return result; - } - - default: - return xpath_string(); - } - } - } - - PUGI__FN bool node_is_before_sibling(xml_node_struct* ln, xml_node_struct* rn) - { - assert(ln->parent == rn->parent); - - // there is no common ancestor (the shared parent is null), nodes are from different documents - if (!ln->parent) return ln < rn; - - // determine sibling order - xml_node_struct* ls = ln; - xml_node_struct* rs = rn; - - while (ls && rs) - { - if (ls == rn) return true; - if (rs == ln) return false; - - ls = ls->next_sibling; - rs = rs->next_sibling; - } - - // if rn sibling chain ended ln must be before rn - return !rs; - } - - PUGI__FN bool node_is_before(xml_node_struct* ln, xml_node_struct* rn) - { - // find common ancestor at the same depth, if any - xml_node_struct* lp = ln; - xml_node_struct* rp = rn; - - while (lp && rp && lp->parent != rp->parent) - { - lp = lp->parent; - rp = rp->parent; - } - - // parents are the same! - if (lp && rp) return node_is_before_sibling(lp, rp); - - // nodes are at different depths, need to normalize heights - bool left_higher = !lp; - - while (lp) - { - lp = lp->parent; - ln = ln->parent; - } - - while (rp) - { - rp = rp->parent; - rn = rn->parent; - } - - // one node is the ancestor of the other - if (ln == rn) return left_higher; - - // find common ancestor... again - while (ln->parent != rn->parent) - { - ln = ln->parent; - rn = rn->parent; - } - - return node_is_before_sibling(ln, rn); - } - - PUGI__FN bool node_is_ancestor(xml_node_struct* parent, xml_node_struct* node) - { - while (node && node != parent) node = node->parent; - - return parent && node == parent; - } - - PUGI__FN const void* document_buffer_order(const xpath_node& xnode) - { - xml_node_struct* node = xnode.node().internal_object(); - - if (node) - { - if ((get_document(node).header & xml_memory_page_contents_shared_mask) == 0) - { - if (node->name && (node->header & impl::xml_memory_page_name_allocated_or_shared_mask) == 0) return node->name; - if (node->value && (node->header & impl::xml_memory_page_value_allocated_or_shared_mask) == 0) return node->value; - } - - return 0; - } - - xml_attribute_struct* attr = xnode.attribute().internal_object(); - - if (attr) - { - if ((get_document(attr).header & xml_memory_page_contents_shared_mask) == 0) - { - if ((attr->header & impl::xml_memory_page_name_allocated_or_shared_mask) == 0) return attr->name; - if ((attr->header & impl::xml_memory_page_value_allocated_or_shared_mask) == 0) return attr->value; - } - - return 0; - } - - return 0; - } - - struct document_order_comparator - { - bool operator()(const xpath_node& lhs, const xpath_node& rhs) const - { - // optimized document order based check - const void* lo = document_buffer_order(lhs); - const void* ro = document_buffer_order(rhs); - - if (lo && ro) return lo < ro; - - // slow comparison - xml_node ln = lhs.node(), rn = rhs.node(); - - // compare attributes - if (lhs.attribute() && rhs.attribute()) - { - // shared parent - if (lhs.parent() == rhs.parent()) - { - // determine sibling order - for (xml_attribute a = lhs.attribute(); a; a = a.next_attribute()) - if (a == rhs.attribute()) - return true; - - return false; - } - - // compare attribute parents - ln = lhs.parent(); - rn = rhs.parent(); - } - else if (lhs.attribute()) - { - // attributes go after the parent element - if (lhs.parent() == rhs.node()) return false; - - ln = lhs.parent(); - } - else if (rhs.attribute()) - { - // attributes go after the parent element - if (rhs.parent() == lhs.node()) return true; - - rn = rhs.parent(); - } - - if (ln == rn) return false; - - if (!ln || !rn) return ln < rn; - - return node_is_before(ln.internal_object(), rn.internal_object()); - } - }; - - PUGI__FN double gen_nan() - { - #if defined(__STDC_IEC_559__) || ((FLT_RADIX - 0 == 2) && (FLT_MAX_EXP - 0 == 128) && (FLT_MANT_DIG - 0 == 24)) - PUGI__STATIC_ASSERT(sizeof(float) == sizeof(uint32_t)); - typedef uint32_t UI; // BCC5 workaround - union { float f; UI i; } u; - u.i = 0x7fc00000; - return double(u.f); - #else - // fallback - const volatile double zero = 0.0; - return zero / zero; - #endif - } - - PUGI__FN bool is_nan(double value) - { - #if defined(PUGI__MSVC_CRT_VERSION) || defined(__BORLANDC__) - return !!_isnan(value); - #elif defined(fpclassify) && defined(FP_NAN) - return fpclassify(value) == FP_NAN; - #else - // fallback - const volatile double v = value; - return v != v; - #endif - } - - PUGI__FN const char_t* convert_number_to_string_special(double value) - { - #if defined(PUGI__MSVC_CRT_VERSION) || defined(__BORLANDC__) - if (_finite(value)) return (value == 0) ? PUGIXML_TEXT("0") : 0; - if (_isnan(value)) return PUGIXML_TEXT("NaN"); - return value > 0 ? PUGIXML_TEXT("Infinity") : PUGIXML_TEXT("-Infinity"); - #elif defined(fpclassify) && defined(FP_NAN) && defined(FP_INFINITE) && defined(FP_ZERO) - switch (fpclassify(value)) - { - case FP_NAN: - return PUGIXML_TEXT("NaN"); - - case FP_INFINITE: - return value > 0 ? PUGIXML_TEXT("Infinity") : PUGIXML_TEXT("-Infinity"); - - case FP_ZERO: - return PUGIXML_TEXT("0"); - - default: - return 0; - } - #else - // fallback - const volatile double v = value; - - if (v == 0) return PUGIXML_TEXT("0"); - if (v != v) return PUGIXML_TEXT("NaN"); - if (v * 2 == v) return value > 0 ? PUGIXML_TEXT("Infinity") : PUGIXML_TEXT("-Infinity"); - return 0; - #endif - } - - PUGI__FN bool convert_number_to_boolean(double value) - { - return (value != 0 && !is_nan(value)); - } - - PUGI__FN void truncate_zeros(char* begin, char* end) - { - while (begin != end && end[-1] == '0') end--; - - *end = 0; - } - - // gets mantissa digits in the form of 0.xxxxx with 0. implied and the exponent -#if defined(PUGI__MSVC_CRT_VERSION) && PUGI__MSVC_CRT_VERSION >= 1400 && !defined(_WIN32_WCE) - PUGI__FN void convert_number_to_mantissa_exponent(double value, char (&buffer)[32], char** out_mantissa, int* out_exponent) - { - // get base values - int sign, exponent; - _ecvt_s(buffer, sizeof(buffer), value, DBL_DIG + 1, &exponent, &sign); - - // truncate redundant zeros - truncate_zeros(buffer, buffer + strlen(buffer)); - - // fill results - *out_mantissa = buffer; - *out_exponent = exponent; - } -#else - PUGI__FN void convert_number_to_mantissa_exponent(double value, char (&buffer)[32], char** out_mantissa, int* out_exponent) - { - // get a scientific notation value with IEEE DBL_DIG decimals - PUGI__SNPRINTF(buffer, "%.*e", DBL_DIG, value); - - // get the exponent (possibly negative) - char* exponent_string = strchr(buffer, 'e'); - assert(exponent_string); - - int exponent = atoi(exponent_string + 1); - - // extract mantissa string: skip sign - char* mantissa = buffer[0] == '-' ? buffer + 1 : buffer; - assert(mantissa[0] != '0' && mantissa[1] == '.'); - - // divide mantissa by 10 to eliminate integer part - mantissa[1] = mantissa[0]; - mantissa++; - exponent++; - - // remove extra mantissa digits and zero-terminate mantissa - truncate_zeros(mantissa, exponent_string); - - // fill results - *out_mantissa = mantissa; - *out_exponent = exponent; - } -#endif - - PUGI__FN xpath_string convert_number_to_string(double value, xpath_allocator* alloc) - { - // try special number conversion - const char_t* special = convert_number_to_string_special(value); - if (special) return xpath_string::from_const(special); - - // get mantissa + exponent form - char mantissa_buffer[32]; - - char* mantissa; - int exponent; - convert_number_to_mantissa_exponent(value, mantissa_buffer, &mantissa, &exponent); - - // allocate a buffer of suitable length for the number - size_t result_size = strlen(mantissa_buffer) + (exponent > 0 ? exponent : -exponent) + 4; - char_t* result = static_cast<char_t*>(alloc->allocate(sizeof(char_t) * result_size)); - if (!result) return xpath_string(); - - // make the number! - char_t* s = result; - - // sign - if (value < 0) *s++ = '-'; - - // integer part - if (exponent <= 0) - { - *s++ = '0'; - } - else - { - while (exponent > 0) - { - assert(*mantissa == 0 || static_cast<unsigned int>(*mantissa - '0') <= 9); - *s++ = *mantissa ? *mantissa++ : '0'; - exponent--; - } - } - - // fractional part - if (*mantissa) - { - // decimal point - *s++ = '.'; - - // extra zeroes from negative exponent - while (exponent < 0) - { - *s++ = '0'; - exponent++; - } - - // extra mantissa digits - while (*mantissa) - { - assert(static_cast<unsigned int>(*mantissa - '0') <= 9); - *s++ = *mantissa++; - } - } - - // zero-terminate - assert(s < result + result_size); - *s = 0; - - return xpath_string::from_heap_preallocated(result, s); - } - - PUGI__FN bool check_string_to_number_format(const char_t* string) - { - // parse leading whitespace - while (PUGI__IS_CHARTYPE(*string, ct_space)) ++string; - - // parse sign - if (*string == '-') ++string; - - if (!*string) return false; - - // if there is no integer part, there should be a decimal part with at least one digit - if (!PUGI__IS_CHARTYPEX(string[0], ctx_digit) && (string[0] != '.' || !PUGI__IS_CHARTYPEX(string[1], ctx_digit))) return false; - - // parse integer part - while (PUGI__IS_CHARTYPEX(*string, ctx_digit)) ++string; - - // parse decimal part - if (*string == '.') - { - ++string; - - while (PUGI__IS_CHARTYPEX(*string, ctx_digit)) ++string; - } - - // parse trailing whitespace - while (PUGI__IS_CHARTYPE(*string, ct_space)) ++string; - - return *string == 0; - } - - PUGI__FN double convert_string_to_number(const char_t* string) - { - // check string format - if (!check_string_to_number_format(string)) return gen_nan(); - - // parse string - #ifdef PUGIXML_WCHAR_MODE - return wcstod(string, 0); - #else - return strtod(string, 0); - #endif - } - - PUGI__FN bool convert_string_to_number_scratch(char_t (&buffer)[32], const char_t* begin, const char_t* end, double* out_result) - { - size_t length = static_cast<size_t>(end - begin); - char_t* scratch = buffer; - - if (length >= sizeof(buffer) / sizeof(buffer[0])) - { - // need to make dummy on-heap copy - scratch = static_cast<char_t*>(xml_memory::allocate((length + 1) * sizeof(char_t))); - if (!scratch) return false; - } - - // copy string to zero-terminated buffer and perform conversion - memcpy(scratch, begin, length * sizeof(char_t)); - scratch[length] = 0; - - *out_result = convert_string_to_number(scratch); - - // free dummy buffer - if (scratch != buffer) xml_memory::deallocate(scratch); - - return true; - } - - PUGI__FN double round_nearest(double value) - { - return floor(value + 0.5); - } - - PUGI__FN double round_nearest_nzero(double value) - { - // same as round_nearest, but returns -0 for [-0.5, -0] - // ceil is used to differentiate between +0 and -0 (we return -0 for [-0.5, -0] and +0 for +0) - return (value >= -0.5 && value <= 0) ? ceil(value) : floor(value + 0.5); - } - - PUGI__FN const char_t* qualified_name(const xpath_node& node) - { - return node.attribute() ? node.attribute().name() : node.node().name(); - } - - PUGI__FN const char_t* local_name(const xpath_node& node) - { - const char_t* name = qualified_name(node); - const char_t* p = find_char(name, ':'); - - return p ? p + 1 : name; - } - - struct namespace_uri_predicate - { - const char_t* prefix; - size_t prefix_length; - - namespace_uri_predicate(const char_t* name) - { - const char_t* pos = find_char(name, ':'); - - prefix = pos ? name : 0; - prefix_length = pos ? static_cast<size_t>(pos - name) : 0; - } - - bool operator()(xml_attribute a) const - { - const char_t* name = a.name(); - - if (!starts_with(name, PUGIXML_TEXT("xmlns"))) return false; - - return prefix ? name[5] == ':' && strequalrange(name + 6, prefix, prefix_length) : name[5] == 0; - } - }; - - PUGI__FN const char_t* namespace_uri(xml_node node) - { - namespace_uri_predicate pred = node.name(); - - xml_node p = node; - - while (p) - { - xml_attribute a = p.find_attribute(pred); - - if (a) return a.value(); - - p = p.parent(); - } - - return PUGIXML_TEXT(""); - } - - PUGI__FN const char_t* namespace_uri(xml_attribute attr, xml_node parent) - { - namespace_uri_predicate pred = attr.name(); - - // Default namespace does not apply to attributes - if (!pred.prefix) return PUGIXML_TEXT(""); - - xml_node p = parent; - - while (p) - { - xml_attribute a = p.find_attribute(pred); - - if (a) return a.value(); - - p = p.parent(); - } - - return PUGIXML_TEXT(""); - } - - PUGI__FN const char_t* namespace_uri(const xpath_node& node) - { - return node.attribute() ? namespace_uri(node.attribute(), node.parent()) : namespace_uri(node.node()); - } - - PUGI__FN char_t* normalize_space(char_t* buffer) - { - char_t* write = buffer; - - for (char_t* it = buffer; *it; ) - { - char_t ch = *it++; - - if (PUGI__IS_CHARTYPE(ch, ct_space)) - { - // replace whitespace sequence with single space - while (PUGI__IS_CHARTYPE(*it, ct_space)) it++; - - // avoid leading spaces - if (write != buffer) *write++ = ' '; - } - else *write++ = ch; - } - - // remove trailing space - if (write != buffer && PUGI__IS_CHARTYPE(write[-1], ct_space)) write--; - - // zero-terminate - *write = 0; - - return write; - } - - PUGI__FN char_t* translate(char_t* buffer, const char_t* from, const char_t* to, size_t to_length) - { - char_t* write = buffer; - - while (*buffer) - { - PUGI__DMC_VOLATILE char_t ch = *buffer++; - - const char_t* pos = find_char(from, ch); - - if (!pos) - *write++ = ch; // do not process - else if (static_cast<size_t>(pos - from) < to_length) - *write++ = to[pos - from]; // replace - } - - // zero-terminate - *write = 0; - - return write; - } - - PUGI__FN unsigned char* translate_table_generate(xpath_allocator* alloc, const char_t* from, const char_t* to) - { - unsigned char table[128] = {0}; - - while (*from) - { - unsigned int fc = static_cast<unsigned int>(*from); - unsigned int tc = static_cast<unsigned int>(*to); - - if (fc >= 128 || tc >= 128) - return 0; - - // code=128 means "skip character" - if (!table[fc]) - table[fc] = static_cast<unsigned char>(tc ? tc : 128); - - from++; - if (tc) to++; - } - - for (int i = 0; i < 128; ++i) - if (!table[i]) - table[i] = static_cast<unsigned char>(i); - - void* result = alloc->allocate(sizeof(table)); - if (!result) return 0; - - memcpy(result, table, sizeof(table)); - - return static_cast<unsigned char*>(result); - } - - PUGI__FN char_t* translate_table(char_t* buffer, const unsigned char* table) - { - char_t* write = buffer; - - while (*buffer) - { - char_t ch = *buffer++; - unsigned int index = static_cast<unsigned int>(ch); - - if (index < 128) - { - unsigned char code = table[index]; - - // code=128 means "skip character" (table size is 128 so 128 can be a special value) - // this code skips these characters without extra branches - *write = static_cast<char_t>(code); - write += 1 - (code >> 7); - } - else - { - *write++ = ch; - } - } - - // zero-terminate - *write = 0; - - return write; - } - - inline bool is_xpath_attribute(const char_t* name) - { - return !(starts_with(name, PUGIXML_TEXT("xmlns")) && (name[5] == 0 || name[5] == ':')); - } - - struct xpath_variable_boolean: xpath_variable - { - xpath_variable_boolean(): xpath_variable(xpath_type_boolean), value(false) - { - } - - bool value; - char_t name[1]; - }; - - struct xpath_variable_number: xpath_variable - { - xpath_variable_number(): xpath_variable(xpath_type_number), value(0) - { - } - - double value; - char_t name[1]; - }; - - struct xpath_variable_string: xpath_variable - { - xpath_variable_string(): xpath_variable(xpath_type_string), value(0) - { - } - - ~xpath_variable_string() - { - if (value) xml_memory::deallocate(value); - } - - char_t* value; - char_t name[1]; - }; - - struct xpath_variable_node_set: xpath_variable - { - xpath_variable_node_set(): xpath_variable(xpath_type_node_set) - { - } - - xpath_node_set value; - char_t name[1]; - }; - - static const xpath_node_set dummy_node_set; - - PUGI__FN PUGI__UNSIGNED_OVERFLOW unsigned int hash_string(const char_t* str) - { - // Jenkins one-at-a-time hash (http://en.wikipedia.org/wiki/Jenkins_hash_function#one-at-a-time) - unsigned int result = 0; - - while (*str) - { - result += static_cast<unsigned int>(*str++); - result += result << 10; - result ^= result >> 6; - } - - result += result << 3; - result ^= result >> 11; - result += result << 15; - - return result; - } - - template <typename T> PUGI__FN T* new_xpath_variable(const char_t* name) - { - size_t length = strlength(name); - if (length == 0) return 0; // empty variable names are invalid - - // $$ we can't use offsetof(T, name) because T is non-POD, so we just allocate additional length characters - void* memory = xml_memory::allocate(sizeof(T) + length * sizeof(char_t)); - if (!memory) return 0; - - T* result = new (memory) T(); - - memcpy(result->name, name, (length + 1) * sizeof(char_t)); - - return result; - } - - PUGI__FN xpath_variable* new_xpath_variable(xpath_value_type type, const char_t* name) - { - switch (type) - { - case xpath_type_node_set: - return new_xpath_variable<xpath_variable_node_set>(name); - - case xpath_type_number: - return new_xpath_variable<xpath_variable_number>(name); - - case xpath_type_string: - return new_xpath_variable<xpath_variable_string>(name); - - case xpath_type_boolean: - return new_xpath_variable<xpath_variable_boolean>(name); - - default: - return 0; - } - } - - template <typename T> PUGI__FN void delete_xpath_variable(T* var) - { - var->~T(); - xml_memory::deallocate(var); - } - - PUGI__FN void delete_xpath_variable(xpath_value_type type, xpath_variable* var) - { - switch (type) - { - case xpath_type_node_set: - delete_xpath_variable(static_cast<xpath_variable_node_set*>(var)); - break; - - case xpath_type_number: - delete_xpath_variable(static_cast<xpath_variable_number*>(var)); - break; - - case xpath_type_string: - delete_xpath_variable(static_cast<xpath_variable_string*>(var)); - break; - - case xpath_type_boolean: - delete_xpath_variable(static_cast<xpath_variable_boolean*>(var)); - break; - - default: - assert(false && "Invalid variable type"); // unreachable - } - } - - PUGI__FN bool copy_xpath_variable(xpath_variable* lhs, const xpath_variable* rhs) - { - switch (rhs->type()) - { - case xpath_type_node_set: - return lhs->set(static_cast<const xpath_variable_node_set*>(rhs)->value); - - case xpath_type_number: - return lhs->set(static_cast<const xpath_variable_number*>(rhs)->value); - - case xpath_type_string: - return lhs->set(static_cast<const xpath_variable_string*>(rhs)->value); - - case xpath_type_boolean: - return lhs->set(static_cast<const xpath_variable_boolean*>(rhs)->value); - - default: - assert(false && "Invalid variable type"); // unreachable - return false; - } - } - - PUGI__FN bool get_variable_scratch(char_t (&buffer)[32], xpath_variable_set* set, const char_t* begin, const char_t* end, xpath_variable** out_result) - { - size_t length = static_cast<size_t>(end - begin); - char_t* scratch = buffer; - - if (length >= sizeof(buffer) / sizeof(buffer[0])) - { - // need to make dummy on-heap copy - scratch = static_cast<char_t*>(xml_memory::allocate((length + 1) * sizeof(char_t))); - if (!scratch) return false; - } - - // copy string to zero-terminated buffer and perform lookup - memcpy(scratch, begin, length * sizeof(char_t)); - scratch[length] = 0; - - *out_result = set->get(scratch); - - // free dummy buffer - if (scratch != buffer) xml_memory::deallocate(scratch); - - return true; - } -PUGI__NS_END - -// Internal node set class -PUGI__NS_BEGIN - PUGI__FN xpath_node_set::type_t xpath_get_order(const xpath_node* begin, const xpath_node* end) - { - if (end - begin < 2) - return xpath_node_set::type_sorted; - - document_order_comparator cmp; - - bool first = cmp(begin[0], begin[1]); - - for (const xpath_node* it = begin + 1; it + 1 < end; ++it) - if (cmp(it[0], it[1]) != first) - return xpath_node_set::type_unsorted; - - return first ? xpath_node_set::type_sorted : xpath_node_set::type_sorted_reverse; - } - - PUGI__FN xpath_node_set::type_t xpath_sort(xpath_node* begin, xpath_node* end, xpath_node_set::type_t type, bool rev) - { - xpath_node_set::type_t order = rev ? xpath_node_set::type_sorted_reverse : xpath_node_set::type_sorted; - - if (type == xpath_node_set::type_unsorted) - { - xpath_node_set::type_t sorted = xpath_get_order(begin, end); - - if (sorted == xpath_node_set::type_unsorted) - { - sort(begin, end, document_order_comparator()); - - type = xpath_node_set::type_sorted; - } - else - type = sorted; - } - - if (type != order) reverse(begin, end); - - return order; - } - - PUGI__FN xpath_node xpath_first(const xpath_node* begin, const xpath_node* end, xpath_node_set::type_t type) - { - if (begin == end) return xpath_node(); - - switch (type) - { - case xpath_node_set::type_sorted: - return *begin; - - case xpath_node_set::type_sorted_reverse: - return *(end - 1); - - case xpath_node_set::type_unsorted: - return *min_element(begin, end, document_order_comparator()); - - default: - assert(false && "Invalid node set type"); // unreachable - return xpath_node(); - } - } - - class xpath_node_set_raw - { - xpath_node_set::type_t _type; - - xpath_node* _begin; - xpath_node* _end; - xpath_node* _eos; - - public: - xpath_node_set_raw(): _type(xpath_node_set::type_unsorted), _begin(0), _end(0), _eos(0) - { - } - - xpath_node* begin() const - { - return _begin; - } - - xpath_node* end() const - { - return _end; - } - - bool empty() const - { - return _begin == _end; - } - - size_t size() const - { - return static_cast<size_t>(_end - _begin); - } - - xpath_node first() const - { - return xpath_first(_begin, _end, _type); - } - - void push_back_grow(const xpath_node& node, xpath_allocator* alloc); - - void push_back(const xpath_node& node, xpath_allocator* alloc) - { - if (_end != _eos) - *_end++ = node; - else - push_back_grow(node, alloc); - } - - void append(const xpath_node* begin_, const xpath_node* end_, xpath_allocator* alloc) - { - if (begin_ == end_) return; - - size_t size_ = static_cast<size_t>(_end - _begin); - size_t capacity = static_cast<size_t>(_eos - _begin); - size_t count = static_cast<size_t>(end_ - begin_); - - if (size_ + count > capacity) - { - // reallocate the old array or allocate a new one - xpath_node* data = static_cast<xpath_node*>(alloc->reallocate(_begin, capacity * sizeof(xpath_node), (size_ + count) * sizeof(xpath_node))); - if (!data) return; - - // finalize - _begin = data; - _end = data + size_; - _eos = data + size_ + count; - } - - memcpy(_end, begin_, count * sizeof(xpath_node)); - _end += count; - } - - void sort_do() - { - _type = xpath_sort(_begin, _end, _type, false); - } - - void truncate(xpath_node* pos) - { - assert(_begin <= pos && pos <= _end); - - _end = pos; - } - - void remove_duplicates(xpath_allocator* alloc) - { - if (_type == xpath_node_set::type_unsorted && _end - _begin > 2) - { - xpath_allocator_capture cr(alloc); - - size_t size_ = static_cast<size_t>(_end - _begin); - - size_t hash_size = 1; - while (hash_size < size_ + size_ / 2) hash_size *= 2; - - const void** hash_data = static_cast<const void**>(alloc->allocate(hash_size * sizeof(void**))); - if (!hash_data) return; - - memset(hash_data, 0, hash_size * sizeof(const void**)); - - xpath_node* write = _begin; - - for (xpath_node* it = _begin; it != _end; ++it) - { - const void* attr = it->attribute().internal_object(); - const void* node = it->node().internal_object(); - const void* key = attr ? attr : node; - - if (key && hash_insert(hash_data, hash_size, key)) - { - *write++ = *it; - } - } - - _end = write; - } - else - { - _end = unique(_begin, _end); - } - } - - xpath_node_set::type_t type() const - { - return _type; - } - - void set_type(xpath_node_set::type_t value) - { - _type = value; - } - }; - - PUGI__FN_NO_INLINE void xpath_node_set_raw::push_back_grow(const xpath_node& node, xpath_allocator* alloc) - { - size_t capacity = static_cast<size_t>(_eos - _begin); - - // get new capacity (1.5x rule) - size_t new_capacity = capacity + capacity / 2 + 1; - - // reallocate the old array or allocate a new one - xpath_node* data = static_cast<xpath_node*>(alloc->reallocate(_begin, capacity * sizeof(xpath_node), new_capacity * sizeof(xpath_node))); - if (!data) return; - - // finalize - _begin = data; - _end = data + capacity; - _eos = data + new_capacity; - - // push - *_end++ = node; - } -PUGI__NS_END - -PUGI__NS_BEGIN - struct xpath_context - { - xpath_node n; - size_t position, size; - - xpath_context(const xpath_node& n_, size_t position_, size_t size_): n(n_), position(position_), size(size_) - { - } - }; - - enum lexeme_t - { - lex_none = 0, - lex_equal, - lex_not_equal, - lex_less, - lex_greater, - lex_less_or_equal, - lex_greater_or_equal, - lex_plus, - lex_minus, - lex_multiply, - lex_union, - lex_var_ref, - lex_open_brace, - lex_close_brace, - lex_quoted_string, - lex_number, - lex_slash, - lex_double_slash, - lex_open_square_brace, - lex_close_square_brace, - lex_string, - lex_comma, - lex_axis_attribute, - lex_dot, - lex_double_dot, - lex_double_colon, - lex_eof - }; - - struct xpath_lexer_string - { - const char_t* begin; - const char_t* end; - - xpath_lexer_string(): begin(0), end(0) - { - } - - bool operator==(const char_t* other) const - { - size_t length = static_cast<size_t>(end - begin); - - return strequalrange(other, begin, length); - } - }; - - class xpath_lexer - { - const char_t* _cur; - const char_t* _cur_lexeme_pos; - xpath_lexer_string _cur_lexeme_contents; - - lexeme_t _cur_lexeme; - - public: - explicit xpath_lexer(const char_t* query): _cur(query) - { - next(); - } - - const char_t* state() const - { - return _cur; - } - - void next() - { - const char_t* cur = _cur; - - while (PUGI__IS_CHARTYPE(*cur, ct_space)) ++cur; - - // save lexeme position for error reporting - _cur_lexeme_pos = cur; - - switch (*cur) - { - case 0: - _cur_lexeme = lex_eof; - break; - - case '>': - if (*(cur+1) == '=') - { - cur += 2; - _cur_lexeme = lex_greater_or_equal; - } - else - { - cur += 1; - _cur_lexeme = lex_greater; - } - break; - - case '<': - if (*(cur+1) == '=') - { - cur += 2; - _cur_lexeme = lex_less_or_equal; - } - else - { - cur += 1; - _cur_lexeme = lex_less; - } - break; - - case '!': - if (*(cur+1) == '=') - { - cur += 2; - _cur_lexeme = lex_not_equal; - } - else - { - _cur_lexeme = lex_none; - } - break; - - case '=': - cur += 1; - _cur_lexeme = lex_equal; - - break; - - case '+': - cur += 1; - _cur_lexeme = lex_plus; - - break; - - case '-': - cur += 1; - _cur_lexeme = lex_minus; - - break; - - case '*': - cur += 1; - _cur_lexeme = lex_multiply; - - break; - - case '|': - cur += 1; - _cur_lexeme = lex_union; - - break; - - case '$': - cur += 1; - - if (PUGI__IS_CHARTYPEX(*cur, ctx_start_symbol)) - { - _cur_lexeme_contents.begin = cur; - - while (PUGI__IS_CHARTYPEX(*cur, ctx_symbol)) cur++; - - if (cur[0] == ':' && PUGI__IS_CHARTYPEX(cur[1], ctx_symbol)) // qname - { - cur++; // : - - while (PUGI__IS_CHARTYPEX(*cur, ctx_symbol)) cur++; - } - - _cur_lexeme_contents.end = cur; - - _cur_lexeme = lex_var_ref; - } - else - { - _cur_lexeme = lex_none; - } - - break; - - case '(': - cur += 1; - _cur_lexeme = lex_open_brace; - - break; - - case ')': - cur += 1; - _cur_lexeme = lex_close_brace; - - break; - - case '[': - cur += 1; - _cur_lexeme = lex_open_square_brace; - - break; - - case ']': - cur += 1; - _cur_lexeme = lex_close_square_brace; - - break; - - case ',': - cur += 1; - _cur_lexeme = lex_comma; - - break; - - case '/': - if (*(cur+1) == '/') - { - cur += 2; - _cur_lexeme = lex_double_slash; - } - else - { - cur += 1; - _cur_lexeme = lex_slash; - } - break; - - case '.': - if (*(cur+1) == '.') - { - cur += 2; - _cur_lexeme = lex_double_dot; - } - else if (PUGI__IS_CHARTYPEX(*(cur+1), ctx_digit)) - { - _cur_lexeme_contents.begin = cur; // . - - ++cur; - - while (PUGI__IS_CHARTYPEX(*cur, ctx_digit)) cur++; - - _cur_lexeme_contents.end = cur; - - _cur_lexeme = lex_number; - } - else - { - cur += 1; - _cur_lexeme = lex_dot; - } - break; - - case '@': - cur += 1; - _cur_lexeme = lex_axis_attribute; - - break; - - case '"': - case '\'': - { - char_t terminator = *cur; - - ++cur; - - _cur_lexeme_contents.begin = cur; - while (*cur && *cur != terminator) cur++; - _cur_lexeme_contents.end = cur; - - if (!*cur) - _cur_lexeme = lex_none; - else - { - cur += 1; - _cur_lexeme = lex_quoted_string; - } - - break; - } - - case ':': - if (*(cur+1) == ':') - { - cur += 2; - _cur_lexeme = lex_double_colon; - } - else - { - _cur_lexeme = lex_none; - } - break; - - default: - if (PUGI__IS_CHARTYPEX(*cur, ctx_digit)) - { - _cur_lexeme_contents.begin = cur; - - while (PUGI__IS_CHARTYPEX(*cur, ctx_digit)) cur++; - - if (*cur == '.') - { - cur++; - - while (PUGI__IS_CHARTYPEX(*cur, ctx_digit)) cur++; - } - - _cur_lexeme_contents.end = cur; - - _cur_lexeme = lex_number; - } - else if (PUGI__IS_CHARTYPEX(*cur, ctx_start_symbol)) - { - _cur_lexeme_contents.begin = cur; - - while (PUGI__IS_CHARTYPEX(*cur, ctx_symbol)) cur++; - - if (cur[0] == ':') - { - if (cur[1] == '*') // namespace test ncname:* - { - cur += 2; // :* - } - else if (PUGI__IS_CHARTYPEX(cur[1], ctx_symbol)) // namespace test qname - { - cur++; // : - - while (PUGI__IS_CHARTYPEX(*cur, ctx_symbol)) cur++; - } - } - - _cur_lexeme_contents.end = cur; - - _cur_lexeme = lex_string; - } - else - { - _cur_lexeme = lex_none; - } - } - - _cur = cur; - } - - lexeme_t current() const - { - return _cur_lexeme; - } - - const char_t* current_pos() const - { - return _cur_lexeme_pos; - } - - const xpath_lexer_string& contents() const - { - assert(_cur_lexeme == lex_var_ref || _cur_lexeme == lex_number || _cur_lexeme == lex_string || _cur_lexeme == lex_quoted_string); - - return _cur_lexeme_contents; - } - }; - - enum ast_type_t - { - ast_unknown, - ast_op_or, // left or right - ast_op_and, // left and right - ast_op_equal, // left = right - ast_op_not_equal, // left != right - ast_op_less, // left < right - ast_op_greater, // left > right - ast_op_less_or_equal, // left <= right - ast_op_greater_or_equal, // left >= right - ast_op_add, // left + right - ast_op_subtract, // left - right - ast_op_multiply, // left * right - ast_op_divide, // left / right - ast_op_mod, // left % right - ast_op_negate, // left - right - ast_op_union, // left | right - ast_predicate, // apply predicate to set; next points to next predicate - ast_filter, // select * from left where right - ast_string_constant, // string constant - ast_number_constant, // number constant - ast_variable, // variable - ast_func_last, // last() - ast_func_position, // position() - ast_func_count, // count(left) - ast_func_id, // id(left) - ast_func_local_name_0, // local-name() - ast_func_local_name_1, // local-name(left) - ast_func_namespace_uri_0, // namespace-uri() - ast_func_namespace_uri_1, // namespace-uri(left) - ast_func_name_0, // name() - ast_func_name_1, // name(left) - ast_func_string_0, // string() - ast_func_string_1, // string(left) - ast_func_concat, // concat(left, right, siblings) - ast_func_starts_with, // starts_with(left, right) - ast_func_contains, // contains(left, right) - ast_func_substring_before, // substring-before(left, right) - ast_func_substring_after, // substring-after(left, right) - ast_func_substring_2, // substring(left, right) - ast_func_substring_3, // substring(left, right, third) - ast_func_string_length_0, // string-length() - ast_func_string_length_1, // string-length(left) - ast_func_normalize_space_0, // normalize-space() - ast_func_normalize_space_1, // normalize-space(left) - ast_func_translate, // translate(left, right, third) - ast_func_boolean, // boolean(left) - ast_func_not, // not(left) - ast_func_true, // true() - ast_func_false, // false() - ast_func_lang, // lang(left) - ast_func_number_0, // number() - ast_func_number_1, // number(left) - ast_func_sum, // sum(left) - ast_func_floor, // floor(left) - ast_func_ceiling, // ceiling(left) - ast_func_round, // round(left) - ast_step, // process set left with step - ast_step_root, // select root node - - ast_opt_translate_table, // translate(left, right, third) where right/third are constants - ast_opt_compare_attribute // @name = 'string' - }; - - enum axis_t - { - axis_ancestor, - axis_ancestor_or_self, - axis_attribute, - axis_child, - axis_descendant, - axis_descendant_or_self, - axis_following, - axis_following_sibling, - axis_namespace, - axis_parent, - axis_preceding, - axis_preceding_sibling, - axis_self - }; - - enum nodetest_t - { - nodetest_none, - nodetest_name, - nodetest_type_node, - nodetest_type_comment, - nodetest_type_pi, - nodetest_type_text, - nodetest_pi, - nodetest_all, - nodetest_all_in_namespace - }; - - enum predicate_t - { - predicate_default, - predicate_posinv, - predicate_constant, - predicate_constant_one - }; - - enum nodeset_eval_t - { - nodeset_eval_all, - nodeset_eval_any, - nodeset_eval_first - }; - - template <axis_t N> struct axis_to_type - { - static const axis_t axis; - }; - - template <axis_t N> const axis_t axis_to_type<N>::axis = N; - - class xpath_ast_node - { - private: - // node type - char _type; - char _rettype; - - // for ast_step - char _axis; - - // for ast_step/ast_predicate/ast_filter - char _test; - - // tree node structure - xpath_ast_node* _left; - xpath_ast_node* _right; - xpath_ast_node* _next; - - union - { - // value for ast_string_constant - const char_t* string; - // value for ast_number_constant - double number; - // variable for ast_variable - xpath_variable* variable; - // node test for ast_step (node name/namespace/node type/pi target) - const char_t* nodetest; - // table for ast_opt_translate_table - const unsigned char* table; - } _data; - - xpath_ast_node(const xpath_ast_node&); - xpath_ast_node& operator=(const xpath_ast_node&); - - template <class Comp> static bool compare_eq(xpath_ast_node* lhs, xpath_ast_node* rhs, const xpath_context& c, const xpath_stack& stack, const Comp& comp) - { - xpath_value_type lt = lhs->rettype(), rt = rhs->rettype(); - - if (lt != xpath_type_node_set && rt != xpath_type_node_set) - { - if (lt == xpath_type_boolean || rt == xpath_type_boolean) - return comp(lhs->eval_boolean(c, stack), rhs->eval_boolean(c, stack)); - else if (lt == xpath_type_number || rt == xpath_type_number) - return comp(lhs->eval_number(c, stack), rhs->eval_number(c, stack)); - else if (lt == xpath_type_string || rt == xpath_type_string) - { - xpath_allocator_capture cr(stack.result); - - xpath_string ls = lhs->eval_string(c, stack); - xpath_string rs = rhs->eval_string(c, stack); - - return comp(ls, rs); - } - } - else if (lt == xpath_type_node_set && rt == xpath_type_node_set) - { - xpath_allocator_capture cr(stack.result); - - xpath_node_set_raw ls = lhs->eval_node_set(c, stack, nodeset_eval_all); - xpath_node_set_raw rs = rhs->eval_node_set(c, stack, nodeset_eval_all); - - for (const xpath_node* li = ls.begin(); li != ls.end(); ++li) - for (const xpath_node* ri = rs.begin(); ri != rs.end(); ++ri) - { - xpath_allocator_capture cri(stack.result); - - if (comp(string_value(*li, stack.result), string_value(*ri, stack.result))) - return true; - } - - return false; - } - else - { - if (lt == xpath_type_node_set) - { - swap(lhs, rhs); - swap(lt, rt); - } - - if (lt == xpath_type_boolean) - return comp(lhs->eval_boolean(c, stack), rhs->eval_boolean(c, stack)); - else if (lt == xpath_type_number) - { - xpath_allocator_capture cr(stack.result); - - double l = lhs->eval_number(c, stack); - xpath_node_set_raw rs = rhs->eval_node_set(c, stack, nodeset_eval_all); - - for (const xpath_node* ri = rs.begin(); ri != rs.end(); ++ri) - { - xpath_allocator_capture cri(stack.result); - - if (comp(l, convert_string_to_number(string_value(*ri, stack.result).c_str()))) - return true; - } - - return false; - } - else if (lt == xpath_type_string) - { - xpath_allocator_capture cr(stack.result); - - xpath_string l = lhs->eval_string(c, stack); - xpath_node_set_raw rs = rhs->eval_node_set(c, stack, nodeset_eval_all); - - for (const xpath_node* ri = rs.begin(); ri != rs.end(); ++ri) - { - xpath_allocator_capture cri(stack.result); - - if (comp(l, string_value(*ri, stack.result))) - return true; - } - - return false; - } - } - - assert(false && "Wrong types"); // unreachable - return false; - } - - static bool eval_once(xpath_node_set::type_t type, nodeset_eval_t eval) - { - return type == xpath_node_set::type_sorted ? eval != nodeset_eval_all : eval == nodeset_eval_any; - } - - template <class Comp> static bool compare_rel(xpath_ast_node* lhs, xpath_ast_node* rhs, const xpath_context& c, const xpath_stack& stack, const Comp& comp) - { - xpath_value_type lt = lhs->rettype(), rt = rhs->rettype(); - - if (lt != xpath_type_node_set && rt != xpath_type_node_set) - return comp(lhs->eval_number(c, stack), rhs->eval_number(c, stack)); - else if (lt == xpath_type_node_set && rt == xpath_type_node_set) - { - xpath_allocator_capture cr(stack.result); - - xpath_node_set_raw ls = lhs->eval_node_set(c, stack, nodeset_eval_all); - xpath_node_set_raw rs = rhs->eval_node_set(c, stack, nodeset_eval_all); - - for (const xpath_node* li = ls.begin(); li != ls.end(); ++li) - { - xpath_allocator_capture cri(stack.result); - - double l = convert_string_to_number(string_value(*li, stack.result).c_str()); - - for (const xpath_node* ri = rs.begin(); ri != rs.end(); ++ri) - { - xpath_allocator_capture crii(stack.result); - - if (comp(l, convert_string_to_number(string_value(*ri, stack.result).c_str()))) - return true; - } - } - - return false; - } - else if (lt != xpath_type_node_set && rt == xpath_type_node_set) - { - xpath_allocator_capture cr(stack.result); - - double l = lhs->eval_number(c, stack); - xpath_node_set_raw rs = rhs->eval_node_set(c, stack, nodeset_eval_all); - - for (const xpath_node* ri = rs.begin(); ri != rs.end(); ++ri) - { - xpath_allocator_capture cri(stack.result); - - if (comp(l, convert_string_to_number(string_value(*ri, stack.result).c_str()))) - return true; - } - - return false; - } - else if (lt == xpath_type_node_set && rt != xpath_type_node_set) - { - xpath_allocator_capture cr(stack.result); - - xpath_node_set_raw ls = lhs->eval_node_set(c, stack, nodeset_eval_all); - double r = rhs->eval_number(c, stack); - - for (const xpath_node* li = ls.begin(); li != ls.end(); ++li) - { - xpath_allocator_capture cri(stack.result); - - if (comp(convert_string_to_number(string_value(*li, stack.result).c_str()), r)) - return true; - } - - return false; - } - else - { - assert(false && "Wrong types"); // unreachable - return false; - } - } - - static void apply_predicate_boolean(xpath_node_set_raw& ns, size_t first, xpath_ast_node* expr, const xpath_stack& stack, bool once) - { - assert(ns.size() >= first); - assert(expr->rettype() != xpath_type_number); - - size_t i = 1; - size_t size = ns.size() - first; - - xpath_node* last = ns.begin() + first; - - // remove_if... or well, sort of - for (xpath_node* it = last; it != ns.end(); ++it, ++i) - { - xpath_context c(*it, i, size); - - if (expr->eval_boolean(c, stack)) - { - *last++ = *it; - - if (once) break; - } - } - - ns.truncate(last); - } - - static void apply_predicate_number(xpath_node_set_raw& ns, size_t first, xpath_ast_node* expr, const xpath_stack& stack, bool once) - { - assert(ns.size() >= first); - assert(expr->rettype() == xpath_type_number); - - size_t i = 1; - size_t size = ns.size() - first; - - xpath_node* last = ns.begin() + first; - - // remove_if... or well, sort of - for (xpath_node* it = last; it != ns.end(); ++it, ++i) - { - xpath_context c(*it, i, size); - - if (expr->eval_number(c, stack) == static_cast<double>(i)) - { - *last++ = *it; - - if (once) break; - } - } - - ns.truncate(last); - } - - static void apply_predicate_number_const(xpath_node_set_raw& ns, size_t first, xpath_ast_node* expr, const xpath_stack& stack) - { - assert(ns.size() >= first); - assert(expr->rettype() == xpath_type_number); - - size_t size = ns.size() - first; - - xpath_node* last = ns.begin() + first; - - xpath_context c(xpath_node(), 1, size); - - double er = expr->eval_number(c, stack); - - if (er >= 1.0 && er <= static_cast<double>(size)) - { - size_t eri = static_cast<size_t>(er); - - if (er == static_cast<double>(eri)) - { - xpath_node r = last[eri - 1]; - - *last++ = r; - } - } - - ns.truncate(last); - } - - void apply_predicate(xpath_node_set_raw& ns, size_t first, const xpath_stack& stack, bool once) - { - if (ns.size() == first) return; - - assert(_type == ast_filter || _type == ast_predicate); - - if (_test == predicate_constant || _test == predicate_constant_one) - apply_predicate_number_const(ns, first, _right, stack); - else if (_right->rettype() == xpath_type_number) - apply_predicate_number(ns, first, _right, stack, once); - else - apply_predicate_boolean(ns, first, _right, stack, once); - } - - void apply_predicates(xpath_node_set_raw& ns, size_t first, const xpath_stack& stack, nodeset_eval_t eval) - { - if (ns.size() == first) return; - - bool last_once = eval_once(ns.type(), eval); - - for (xpath_ast_node* pred = _right; pred; pred = pred->_next) - pred->apply_predicate(ns, first, stack, !pred->_next && last_once); - } - - bool step_push(xpath_node_set_raw& ns, xml_attribute_struct* a, xml_node_struct* parent, xpath_allocator* alloc) - { - assert(a); - - const char_t* name = a->name ? a->name + 0 : PUGIXML_TEXT(""); - - switch (_test) - { - case nodetest_name: - if (strequal(name, _data.nodetest) && is_xpath_attribute(name)) - { - ns.push_back(xpath_node(xml_attribute(a), xml_node(parent)), alloc); - return true; - } - break; - - case nodetest_type_node: - case nodetest_all: - if (is_xpath_attribute(name)) - { - ns.push_back(xpath_node(xml_attribute(a), xml_node(parent)), alloc); - return true; - } - break; - - case nodetest_all_in_namespace: - if (starts_with(name, _data.nodetest) && is_xpath_attribute(name)) - { - ns.push_back(xpath_node(xml_attribute(a), xml_node(parent)), alloc); - return true; - } - break; - - default: - ; - } - - return false; - } - - bool step_push(xpath_node_set_raw& ns, xml_node_struct* n, xpath_allocator* alloc) - { - assert(n); - - xml_node_type type = PUGI__NODETYPE(n); - - switch (_test) - { - case nodetest_name: - if (type == node_element && n->name && strequal(n->name, _data.nodetest)) - { - ns.push_back(xml_node(n), alloc); - return true; - } - break; - - case nodetest_type_node: - ns.push_back(xml_node(n), alloc); - return true; - - case nodetest_type_comment: - if (type == node_comment) - { - ns.push_back(xml_node(n), alloc); - return true; - } - break; - - case nodetest_type_text: - if (type == node_pcdata || type == node_cdata) - { - ns.push_back(xml_node(n), alloc); - return true; - } - break; - - case nodetest_type_pi: - if (type == node_pi) - { - ns.push_back(xml_node(n), alloc); - return true; - } - break; - - case nodetest_pi: - if (type == node_pi && n->name && strequal(n->name, _data.nodetest)) - { - ns.push_back(xml_node(n), alloc); - return true; - } - break; - - case nodetest_all: - if (type == node_element) - { - ns.push_back(xml_node(n), alloc); - return true; - } - break; - - case nodetest_all_in_namespace: - if (type == node_element && n->name && starts_with(n->name, _data.nodetest)) - { - ns.push_back(xml_node(n), alloc); - return true; - } - break; - - default: - assert(false && "Unknown axis"); // unreachable - } - - return false; - } - - template <class T> void step_fill(xpath_node_set_raw& ns, xml_node_struct* n, xpath_allocator* alloc, bool once, T) - { - const axis_t axis = T::axis; - - switch (axis) - { - case axis_attribute: - { - for (xml_attribute_struct* a = n->first_attribute; a; a = a->next_attribute) - if (step_push(ns, a, n, alloc) & once) - return; - - break; - } - - case axis_child: - { - for (xml_node_struct* c = n->first_child; c; c = c->next_sibling) - if (step_push(ns, c, alloc) & once) - return; - - break; - } - - case axis_descendant: - case axis_descendant_or_self: - { - if (axis == axis_descendant_or_self) - if (step_push(ns, n, alloc) & once) - return; - - xml_node_struct* cur = n->first_child; - - while (cur) - { - if (step_push(ns, cur, alloc) & once) - return; - - if (cur->first_child) - cur = cur->first_child; - else - { - while (!cur->next_sibling) - { - cur = cur->parent; - - if (cur == n) return; - } - - cur = cur->next_sibling; - } - } - - break; - } - - case axis_following_sibling: - { - for (xml_node_struct* c = n->next_sibling; c; c = c->next_sibling) - if (step_push(ns, c, alloc) & once) - return; - - break; - } - - case axis_preceding_sibling: - { - for (xml_node_struct* c = n->prev_sibling_c; c->next_sibling; c = c->prev_sibling_c) - if (step_push(ns, c, alloc) & once) - return; - - break; - } - - case axis_following: - { - xml_node_struct* cur = n; - - // exit from this node so that we don't include descendants - while (!cur->next_sibling) - { - cur = cur->parent; - - if (!cur) return; - } - - cur = cur->next_sibling; - - while (cur) - { - if (step_push(ns, cur, alloc) & once) - return; - - if (cur->first_child) - cur = cur->first_child; - else - { - while (!cur->next_sibling) - { - cur = cur->parent; - - if (!cur) return; - } - - cur = cur->next_sibling; - } - } - - break; - } - - case axis_preceding: - { - xml_node_struct* cur = n; - - // exit from this node so that we don't include descendants - while (!cur->prev_sibling_c->next_sibling) - { - cur = cur->parent; - - if (!cur) return; - } - - cur = cur->prev_sibling_c; - - while (cur) - { - if (cur->first_child) - cur = cur->first_child->prev_sibling_c; - else - { - // leaf node, can't be ancestor - if (step_push(ns, cur, alloc) & once) - return; - - while (!cur->prev_sibling_c->next_sibling) - { - cur = cur->parent; - - if (!cur) return; - - if (!node_is_ancestor(cur, n)) - if (step_push(ns, cur, alloc) & once) - return; - } - - cur = cur->prev_sibling_c; - } - } - - break; - } - - case axis_ancestor: - case axis_ancestor_or_self: - { - if (axis == axis_ancestor_or_self) - if (step_push(ns, n, alloc) & once) - return; - - xml_node_struct* cur = n->parent; - - while (cur) - { - if (step_push(ns, cur, alloc) & once) - return; - - cur = cur->parent; - } - - break; - } - - case axis_self: - { - step_push(ns, n, alloc); - - break; - } - - case axis_parent: - { - if (n->parent) - step_push(ns, n->parent, alloc); - - break; - } - - default: - assert(false && "Unimplemented axis"); // unreachable - } - } - - template <class T> void step_fill(xpath_node_set_raw& ns, xml_attribute_struct* a, xml_node_struct* p, xpath_allocator* alloc, bool once, T v) - { - const axis_t axis = T::axis; - - switch (axis) - { - case axis_ancestor: - case axis_ancestor_or_self: - { - if (axis == axis_ancestor_or_self && _test == nodetest_type_node) // reject attributes based on principal node type test - if (step_push(ns, a, p, alloc) & once) - return; - - xml_node_struct* cur = p; - - while (cur) - { - if (step_push(ns, cur, alloc) & once) - return; - - cur = cur->parent; - } - - break; - } - - case axis_descendant_or_self: - case axis_self: - { - if (_test == nodetest_type_node) // reject attributes based on principal node type test - step_push(ns, a, p, alloc); - - break; - } - - case axis_following: - { - xml_node_struct* cur = p; - - while (cur) - { - if (cur->first_child) - cur = cur->first_child; - else - { - while (!cur->next_sibling) - { - cur = cur->parent; - - if (!cur) return; - } - - cur = cur->next_sibling; - } - - if (step_push(ns, cur, alloc) & once) - return; - } - - break; - } - - case axis_parent: - { - step_push(ns, p, alloc); - - break; - } - - case axis_preceding: - { - // preceding:: axis does not include attribute nodes and attribute ancestors (they are the same as parent's ancestors), so we can reuse node preceding - step_fill(ns, p, alloc, once, v); - break; - } - - default: - assert(false && "Unimplemented axis"); // unreachable - } - } - - template <class T> void step_fill(xpath_node_set_raw& ns, const xpath_node& xn, xpath_allocator* alloc, bool once, T v) - { - const axis_t axis = T::axis; - const bool axis_has_attributes = (axis == axis_ancestor || axis == axis_ancestor_or_self || axis == axis_descendant_or_self || axis == axis_following || axis == axis_parent || axis == axis_preceding || axis == axis_self); - - if (xn.node()) - step_fill(ns, xn.node().internal_object(), alloc, once, v); - else if (axis_has_attributes && xn.attribute() && xn.parent()) - step_fill(ns, xn.attribute().internal_object(), xn.parent().internal_object(), alloc, once, v); - } - - template <class T> xpath_node_set_raw step_do(const xpath_context& c, const xpath_stack& stack, nodeset_eval_t eval, T v) - { - const axis_t axis = T::axis; - const bool axis_reverse = (axis == axis_ancestor || axis == axis_ancestor_or_self || axis == axis_preceding || axis == axis_preceding_sibling); - const xpath_node_set::type_t axis_type = axis_reverse ? xpath_node_set::type_sorted_reverse : xpath_node_set::type_sorted; - - bool once = - (axis == axis_attribute && _test == nodetest_name) || - (!_right && eval_once(axis_type, eval)) || - // coverity[mixed_enums] - (_right && !_right->_next && _right->_test == predicate_constant_one); - - xpath_node_set_raw ns; - ns.set_type(axis_type); - - if (_left) - { - xpath_node_set_raw s = _left->eval_node_set(c, stack, nodeset_eval_all); - - // self axis preserves the original order - if (axis == axis_self) ns.set_type(s.type()); - - for (const xpath_node* it = s.begin(); it != s.end(); ++it) - { - size_t size = ns.size(); - - // in general, all axes generate elements in a particular order, but there is no order guarantee if axis is applied to two nodes - if (axis != axis_self && size != 0) ns.set_type(xpath_node_set::type_unsorted); - - step_fill(ns, *it, stack.result, once, v); - if (_right) apply_predicates(ns, size, stack, eval); - } - } - else - { - step_fill(ns, c.n, stack.result, once, v); - if (_right) apply_predicates(ns, 0, stack, eval); - } - - // child, attribute and self axes always generate unique set of nodes - // for other axis, if the set stayed sorted, it stayed unique because the traversal algorithms do not visit the same node twice - if (axis != axis_child && axis != axis_attribute && axis != axis_self && ns.type() == xpath_node_set::type_unsorted) - ns.remove_duplicates(stack.temp); - - return ns; - } - - public: - xpath_ast_node(ast_type_t type, xpath_value_type rettype_, const char_t* value): - _type(static_cast<char>(type)), _rettype(static_cast<char>(rettype_)), _axis(0), _test(0), _left(0), _right(0), _next(0) - { - assert(type == ast_string_constant); - _data.string = value; - } - - xpath_ast_node(ast_type_t type, xpath_value_type rettype_, double value): - _type(static_cast<char>(type)), _rettype(static_cast<char>(rettype_)), _axis(0), _test(0), _left(0), _right(0), _next(0) - { - assert(type == ast_number_constant); - _data.number = value; - } - - xpath_ast_node(ast_type_t type, xpath_value_type rettype_, xpath_variable* value): - _type(static_cast<char>(type)), _rettype(static_cast<char>(rettype_)), _axis(0), _test(0), _left(0), _right(0), _next(0) - { - assert(type == ast_variable); - _data.variable = value; - } - - xpath_ast_node(ast_type_t type, xpath_value_type rettype_, xpath_ast_node* left = 0, xpath_ast_node* right = 0): - _type(static_cast<char>(type)), _rettype(static_cast<char>(rettype_)), _axis(0), _test(0), _left(left), _right(right), _next(0) - { - } - - xpath_ast_node(ast_type_t type, xpath_ast_node* left, axis_t axis, nodetest_t test, const char_t* contents): - _type(static_cast<char>(type)), _rettype(xpath_type_node_set), _axis(static_cast<char>(axis)), _test(static_cast<char>(test)), _left(left), _right(0), _next(0) - { - assert(type == ast_step); - _data.nodetest = contents; - } - - xpath_ast_node(ast_type_t type, xpath_ast_node* left, xpath_ast_node* right, predicate_t test): - _type(static_cast<char>(type)), _rettype(xpath_type_node_set), _axis(0), _test(static_cast<char>(test)), _left(left), _right(right), _next(0) - { - assert(type == ast_filter || type == ast_predicate); - } - - void set_next(xpath_ast_node* value) - { - _next = value; - } - - void set_right(xpath_ast_node* value) - { - _right = value; - } - - bool eval_boolean(const xpath_context& c, const xpath_stack& stack) - { - switch (_type) - { - case ast_op_or: - return _left->eval_boolean(c, stack) || _right->eval_boolean(c, stack); - - case ast_op_and: - return _left->eval_boolean(c, stack) && _right->eval_boolean(c, stack); - - case ast_op_equal: - return compare_eq(_left, _right, c, stack, equal_to()); - - case ast_op_not_equal: - return compare_eq(_left, _right, c, stack, not_equal_to()); - - case ast_op_less: - return compare_rel(_left, _right, c, stack, less()); - - case ast_op_greater: - return compare_rel(_right, _left, c, stack, less()); - - case ast_op_less_or_equal: - return compare_rel(_left, _right, c, stack, less_equal()); - - case ast_op_greater_or_equal: - return compare_rel(_right, _left, c, stack, less_equal()); - - case ast_func_starts_with: - { - xpath_allocator_capture cr(stack.result); - - xpath_string lr = _left->eval_string(c, stack); - xpath_string rr = _right->eval_string(c, stack); - - return starts_with(lr.c_str(), rr.c_str()); - } - - case ast_func_contains: - { - xpath_allocator_capture cr(stack.result); - - xpath_string lr = _left->eval_string(c, stack); - xpath_string rr = _right->eval_string(c, stack); - - return find_substring(lr.c_str(), rr.c_str()) != 0; - } - - case ast_func_boolean: - return _left->eval_boolean(c, stack); - - case ast_func_not: - return !_left->eval_boolean(c, stack); - - case ast_func_true: - return true; - - case ast_func_false: - return false; - - case ast_func_lang: - { - if (c.n.attribute()) return false; - - xpath_allocator_capture cr(stack.result); - - xpath_string lang = _left->eval_string(c, stack); - - for (xml_node n = c.n.node(); n; n = n.parent()) - { - xml_attribute a = n.attribute(PUGIXML_TEXT("xml:lang")); - - if (a) - { - const char_t* value = a.value(); - - // strnicmp / strncasecmp is not portable - for (const char_t* lit = lang.c_str(); *lit; ++lit) - { - if (tolower_ascii(*lit) != tolower_ascii(*value)) return false; - ++value; - } - - return *value == 0 || *value == '-'; - } - } - - return false; - } - - case ast_opt_compare_attribute: - { - const char_t* value = (_right->_type == ast_string_constant) ? _right->_data.string : _right->_data.variable->get_string(); - - xml_attribute attr = c.n.node().attribute(_left->_data.nodetest); - - return attr && strequal(attr.value(), value) && is_xpath_attribute(attr.name()); - } - - case ast_variable: - { - assert(_rettype == _data.variable->type()); - - if (_rettype == xpath_type_boolean) - return _data.variable->get_boolean(); - - // variable needs to be converted to the correct type, this is handled by the fallthrough block below - break; - } - - default: - ; - } - - // none of the ast types that return the value directly matched, we need to perform type conversion - switch (_rettype) - { - case xpath_type_number: - return convert_number_to_boolean(eval_number(c, stack)); - - case xpath_type_string: - { - xpath_allocator_capture cr(stack.result); - - return !eval_string(c, stack).empty(); - } - - case xpath_type_node_set: - { - xpath_allocator_capture cr(stack.result); - - return !eval_node_set(c, stack, nodeset_eval_any).empty(); - } - - default: - assert(false && "Wrong expression for return type boolean"); // unreachable - return false; - } - } - - double eval_number(const xpath_context& c, const xpath_stack& stack) - { - switch (_type) - { - case ast_op_add: - return _left->eval_number(c, stack) + _right->eval_number(c, stack); - - case ast_op_subtract: - return _left->eval_number(c, stack) - _right->eval_number(c, stack); - - case ast_op_multiply: - return _left->eval_number(c, stack) * _right->eval_number(c, stack); - - case ast_op_divide: - return _left->eval_number(c, stack) / _right->eval_number(c, stack); - - case ast_op_mod: - return fmod(_left->eval_number(c, stack), _right->eval_number(c, stack)); - - case ast_op_negate: - return -_left->eval_number(c, stack); - - case ast_number_constant: - return _data.number; - - case ast_func_last: - return static_cast<double>(c.size); - - case ast_func_position: - return static_cast<double>(c.position); - - case ast_func_count: - { - xpath_allocator_capture cr(stack.result); - - return static_cast<double>(_left->eval_node_set(c, stack, nodeset_eval_all).size()); - } - - case ast_func_string_length_0: - { - xpath_allocator_capture cr(stack.result); - - return static_cast<double>(string_value(c.n, stack.result).length()); - } - - case ast_func_string_length_1: - { - xpath_allocator_capture cr(stack.result); - - return static_cast<double>(_left->eval_string(c, stack).length()); - } - - case ast_func_number_0: - { - xpath_allocator_capture cr(stack.result); - - return convert_string_to_number(string_value(c.n, stack.result).c_str()); - } - - case ast_func_number_1: - return _left->eval_number(c, stack); - - case ast_func_sum: - { - xpath_allocator_capture cr(stack.result); - - double r = 0; - - xpath_node_set_raw ns = _left->eval_node_set(c, stack, nodeset_eval_all); - - for (const xpath_node* it = ns.begin(); it != ns.end(); ++it) - { - xpath_allocator_capture cri(stack.result); - - r += convert_string_to_number(string_value(*it, stack.result).c_str()); - } - - return r; - } - - case ast_func_floor: - { - double r = _left->eval_number(c, stack); - - return r == r ? floor(r) : r; - } - - case ast_func_ceiling: - { - double r = _left->eval_number(c, stack); - - return r == r ? ceil(r) : r; - } - - case ast_func_round: - return round_nearest_nzero(_left->eval_number(c, stack)); - - case ast_variable: - { - assert(_rettype == _data.variable->type()); - - if (_rettype == xpath_type_number) - return _data.variable->get_number(); - - // variable needs to be converted to the correct type, this is handled by the fallthrough block below - break; - } - - default: - ; - } - - // none of the ast types that return the value directly matched, we need to perform type conversion - switch (_rettype) - { - case xpath_type_boolean: - return eval_boolean(c, stack) ? 1 : 0; - - case xpath_type_string: - { - xpath_allocator_capture cr(stack.result); - - return convert_string_to_number(eval_string(c, stack).c_str()); - } - - case xpath_type_node_set: - { - xpath_allocator_capture cr(stack.result); - - return convert_string_to_number(eval_string(c, stack).c_str()); - } - - default: - assert(false && "Wrong expression for return type number"); // unreachable - return 0; - } - } - - xpath_string eval_string_concat(const xpath_context& c, const xpath_stack& stack) - { - assert(_type == ast_func_concat); - - xpath_allocator_capture ct(stack.temp); - - // count the string number - size_t count = 1; - for (xpath_ast_node* nc = _right; nc; nc = nc->_next) count++; - - // allocate a buffer for temporary string objects - xpath_string* buffer = static_cast<xpath_string*>(stack.temp->allocate(count * sizeof(xpath_string))); - if (!buffer) return xpath_string(); - - // evaluate all strings to temporary stack - xpath_stack swapped_stack = {stack.temp, stack.result}; - - buffer[0] = _left->eval_string(c, swapped_stack); - - size_t pos = 1; - for (xpath_ast_node* n = _right; n; n = n->_next, ++pos) buffer[pos] = n->eval_string(c, swapped_stack); - assert(pos == count); - - // get total length - size_t length = 0; - for (size_t i = 0; i < count; ++i) length += buffer[i].length(); - - // create final string - char_t* result = static_cast<char_t*>(stack.result->allocate((length + 1) * sizeof(char_t))); - if (!result) return xpath_string(); - - char_t* ri = result; - - for (size_t j = 0; j < count; ++j) - for (const char_t* bi = buffer[j].c_str(); *bi; ++bi) - *ri++ = *bi; - - *ri = 0; - - return xpath_string::from_heap_preallocated(result, ri); - } - - xpath_string eval_string(const xpath_context& c, const xpath_stack& stack) - { - switch (_type) - { - case ast_string_constant: - return xpath_string::from_const(_data.string); - - case ast_func_local_name_0: - { - xpath_node na = c.n; - - return xpath_string::from_const(local_name(na)); - } - - case ast_func_local_name_1: - { - xpath_allocator_capture cr(stack.result); - - xpath_node_set_raw ns = _left->eval_node_set(c, stack, nodeset_eval_first); - xpath_node na = ns.first(); - - return xpath_string::from_const(local_name(na)); - } - - case ast_func_name_0: - { - xpath_node na = c.n; - - return xpath_string::from_const(qualified_name(na)); - } - - case ast_func_name_1: - { - xpath_allocator_capture cr(stack.result); - - xpath_node_set_raw ns = _left->eval_node_set(c, stack, nodeset_eval_first); - xpath_node na = ns.first(); - - return xpath_string::from_const(qualified_name(na)); - } - - case ast_func_namespace_uri_0: - { - xpath_node na = c.n; - - return xpath_string::from_const(namespace_uri(na)); - } - - case ast_func_namespace_uri_1: - { - xpath_allocator_capture cr(stack.result); - - xpath_node_set_raw ns = _left->eval_node_set(c, stack, nodeset_eval_first); - xpath_node na = ns.first(); - - return xpath_string::from_const(namespace_uri(na)); - } - - case ast_func_string_0: - return string_value(c.n, stack.result); - - case ast_func_string_1: - return _left->eval_string(c, stack); - - case ast_func_concat: - return eval_string_concat(c, stack); - - case ast_func_substring_before: - { - xpath_allocator_capture cr(stack.temp); - - xpath_stack swapped_stack = {stack.temp, stack.result}; - - xpath_string s = _left->eval_string(c, swapped_stack); - xpath_string p = _right->eval_string(c, swapped_stack); - - const char_t* pos = find_substring(s.c_str(), p.c_str()); - - return pos ? xpath_string::from_heap(s.c_str(), pos, stack.result) : xpath_string(); - } - - case ast_func_substring_after: - { - xpath_allocator_capture cr(stack.temp); - - xpath_stack swapped_stack = {stack.temp, stack.result}; - - xpath_string s = _left->eval_string(c, swapped_stack); - xpath_string p = _right->eval_string(c, swapped_stack); - - const char_t* pos = find_substring(s.c_str(), p.c_str()); - if (!pos) return xpath_string(); - - const char_t* rbegin = pos + p.length(); - const char_t* rend = s.c_str() + s.length(); - - return s.uses_heap() ? xpath_string::from_heap(rbegin, rend, stack.result) : xpath_string::from_const(rbegin); - } - - case ast_func_substring_2: - { - xpath_allocator_capture cr(stack.temp); - - xpath_stack swapped_stack = {stack.temp, stack.result}; - - xpath_string s = _left->eval_string(c, swapped_stack); - size_t s_length = s.length(); - - double first = round_nearest(_right->eval_number(c, stack)); - - if (is_nan(first)) return xpath_string(); // NaN - else if (first >= static_cast<double>(s_length + 1)) return xpath_string(); - - size_t pos = first < 1 ? 1 : static_cast<size_t>(first); - assert(1 <= pos && pos <= s_length + 1); - - const char_t* rbegin = s.c_str() + (pos - 1); - const char_t* rend = s.c_str() + s.length(); - - return s.uses_heap() ? xpath_string::from_heap(rbegin, rend, stack.result) : xpath_string::from_const(rbegin); - } - - case ast_func_substring_3: - { - xpath_allocator_capture cr(stack.temp); - - xpath_stack swapped_stack = {stack.temp, stack.result}; - - xpath_string s = _left->eval_string(c, swapped_stack); - size_t s_length = s.length(); - - double first = round_nearest(_right->eval_number(c, stack)); - double last = first + round_nearest(_right->_next->eval_number(c, stack)); - - if (is_nan(first) || is_nan(last)) return xpath_string(); - else if (first >= static_cast<double>(s_length + 1)) return xpath_string(); - else if (first >= last) return xpath_string(); - else if (last < 1) return xpath_string(); - - size_t pos = first < 1 ? 1 : static_cast<size_t>(first); - size_t end = last >= static_cast<double>(s_length + 1) ? s_length + 1 : static_cast<size_t>(last); - - assert(1 <= pos && pos <= end && end <= s_length + 1); - const char_t* rbegin = s.c_str() + (pos - 1); - const char_t* rend = s.c_str() + (end - 1); - - return (end == s_length + 1 && !s.uses_heap()) ? xpath_string::from_const(rbegin) : xpath_string::from_heap(rbegin, rend, stack.result); - } - - case ast_func_normalize_space_0: - { - xpath_string s = string_value(c.n, stack.result); - - char_t* begin = s.data(stack.result); - if (!begin) return xpath_string(); - - char_t* end = normalize_space(begin); - - return xpath_string::from_heap_preallocated(begin, end); - } - - case ast_func_normalize_space_1: - { - xpath_string s = _left->eval_string(c, stack); - - char_t* begin = s.data(stack.result); - if (!begin) return xpath_string(); - - char_t* end = normalize_space(begin); - - return xpath_string::from_heap_preallocated(begin, end); - } - - case ast_func_translate: - { - xpath_allocator_capture cr(stack.temp); - - xpath_stack swapped_stack = {stack.temp, stack.result}; - - xpath_string s = _left->eval_string(c, stack); - xpath_string from = _right->eval_string(c, swapped_stack); - xpath_string to = _right->_next->eval_string(c, swapped_stack); - - char_t* begin = s.data(stack.result); - if (!begin) return xpath_string(); - - char_t* end = translate(begin, from.c_str(), to.c_str(), to.length()); - - return xpath_string::from_heap_preallocated(begin, end); - } - - case ast_opt_translate_table: - { - xpath_string s = _left->eval_string(c, stack); - - char_t* begin = s.data(stack.result); - if (!begin) return xpath_string(); - - char_t* end = translate_table(begin, _data.table); - - return xpath_string::from_heap_preallocated(begin, end); - } - - case ast_variable: - { - assert(_rettype == _data.variable->type()); - - if (_rettype == xpath_type_string) - return xpath_string::from_const(_data.variable->get_string()); - - // variable needs to be converted to the correct type, this is handled by the fallthrough block below - break; - } - - default: - ; - } - - // none of the ast types that return the value directly matched, we need to perform type conversion - switch (_rettype) - { - case xpath_type_boolean: - return xpath_string::from_const(eval_boolean(c, stack) ? PUGIXML_TEXT("true") : PUGIXML_TEXT("false")); - - case xpath_type_number: - return convert_number_to_string(eval_number(c, stack), stack.result); - - case xpath_type_node_set: - { - xpath_allocator_capture cr(stack.temp); - - xpath_stack swapped_stack = {stack.temp, stack.result}; - - xpath_node_set_raw ns = eval_node_set(c, swapped_stack, nodeset_eval_first); - return ns.empty() ? xpath_string() : string_value(ns.first(), stack.result); - } - - default: - assert(false && "Wrong expression for return type string"); // unreachable - return xpath_string(); - } - } - - xpath_node_set_raw eval_node_set(const xpath_context& c, const xpath_stack& stack, nodeset_eval_t eval) - { - switch (_type) - { - case ast_op_union: - { - xpath_allocator_capture cr(stack.temp); - - xpath_stack swapped_stack = {stack.temp, stack.result}; - - xpath_node_set_raw ls = _left->eval_node_set(c, stack, eval); - xpath_node_set_raw rs = _right->eval_node_set(c, swapped_stack, eval); - - // we can optimize merging two sorted sets, but this is a very rare operation, so don't bother - ls.set_type(xpath_node_set::type_unsorted); - - ls.append(rs.begin(), rs.end(), stack.result); - ls.remove_duplicates(stack.temp); - - return ls; - } - - case ast_filter: - { - xpath_node_set_raw set = _left->eval_node_set(c, stack, _test == predicate_constant_one ? nodeset_eval_first : nodeset_eval_all); - - // either expression is a number or it contains position() call; sort by document order - if (_test != predicate_posinv) set.sort_do(); - - bool once = eval_once(set.type(), eval); - - apply_predicate(set, 0, stack, once); - - return set; - } - - case ast_func_id: - return xpath_node_set_raw(); - - case ast_step: - { - switch (_axis) - { - case axis_ancestor: - return step_do(c, stack, eval, axis_to_type<axis_ancestor>()); - - case axis_ancestor_or_self: - return step_do(c, stack, eval, axis_to_type<axis_ancestor_or_self>()); - - case axis_attribute: - return step_do(c, stack, eval, axis_to_type<axis_attribute>()); - - case axis_child: - return step_do(c, stack, eval, axis_to_type<axis_child>()); - - case axis_descendant: - return step_do(c, stack, eval, axis_to_type<axis_descendant>()); - - case axis_descendant_or_self: - return step_do(c, stack, eval, axis_to_type<axis_descendant_or_self>()); - - case axis_following: - return step_do(c, stack, eval, axis_to_type<axis_following>()); - - case axis_following_sibling: - return step_do(c, stack, eval, axis_to_type<axis_following_sibling>()); - - case axis_namespace: - // namespaced axis is not supported - return xpath_node_set_raw(); - - case axis_parent: - return step_do(c, stack, eval, axis_to_type<axis_parent>()); - - case axis_preceding: - return step_do(c, stack, eval, axis_to_type<axis_preceding>()); - - case axis_preceding_sibling: - return step_do(c, stack, eval, axis_to_type<axis_preceding_sibling>()); - - case axis_self: - return step_do(c, stack, eval, axis_to_type<axis_self>()); - - default: - assert(false && "Unknown axis"); // unreachable - return xpath_node_set_raw(); - } - } - - case ast_step_root: - { - assert(!_right); // root step can't have any predicates - - xpath_node_set_raw ns; - - ns.set_type(xpath_node_set::type_sorted); - - if (c.n.node()) ns.push_back(c.n.node().root(), stack.result); - else if (c.n.attribute()) ns.push_back(c.n.parent().root(), stack.result); - - return ns; - } - - case ast_variable: - { - assert(_rettype == _data.variable->type()); - - if (_rettype == xpath_type_node_set) - { - const xpath_node_set& s = _data.variable->get_node_set(); - - xpath_node_set_raw ns; - - ns.set_type(s.type()); - ns.append(s.begin(), s.end(), stack.result); - - return ns; - } - - // variable needs to be converted to the correct type, this is handled by the fallthrough block below - break; - } - - default: - ; - } - - // none of the ast types that return the value directly matched, but conversions to node set are invalid - assert(false && "Wrong expression for return type node set"); // unreachable - return xpath_node_set_raw(); - } - - void optimize(xpath_allocator* alloc) - { - if (_left) - _left->optimize(alloc); - - if (_right) - _right->optimize(alloc); - - if (_next) - _next->optimize(alloc); - - // coverity[var_deref_model] - optimize_self(alloc); - } - - void optimize_self(xpath_allocator* alloc) - { - // Rewrite [position()=expr] with [expr] - // Note that this step has to go before classification to recognize [position()=1] - if ((_type == ast_filter || _type == ast_predicate) && - _right && // workaround for clang static analyzer (_right is never null for ast_filter/ast_predicate) - _right->_type == ast_op_equal && _right->_left->_type == ast_func_position && _right->_right->_rettype == xpath_type_number) - { - _right = _right->_right; - } - - // Classify filter/predicate ops to perform various optimizations during evaluation - if ((_type == ast_filter || _type == ast_predicate) && _right) // workaround for clang static analyzer (_right is never null for ast_filter/ast_predicate) - { - assert(_test == predicate_default); - - if (_right->_type == ast_number_constant && _right->_data.number == 1.0) - _test = predicate_constant_one; - else if (_right->_rettype == xpath_type_number && (_right->_type == ast_number_constant || _right->_type == ast_variable || _right->_type == ast_func_last)) - _test = predicate_constant; - else if (_right->_rettype != xpath_type_number && _right->is_posinv_expr()) - _test = predicate_posinv; - } - - // Rewrite descendant-or-self::node()/child::foo with descendant::foo - // The former is a full form of //foo, the latter is much faster since it executes the node test immediately - // Do a similar kind of rewrite for self/descendant/descendant-or-self axes - // Note that we only rewrite positionally invariant steps (//foo[1] != /descendant::foo[1]) - if (_type == ast_step && (_axis == axis_child || _axis == axis_self || _axis == axis_descendant || _axis == axis_descendant_or_self) && - _left && _left->_type == ast_step && _left->_axis == axis_descendant_or_self && _left->_test == nodetest_type_node && !_left->_right && - is_posinv_step()) - { - if (_axis == axis_child || _axis == axis_descendant) - _axis = axis_descendant; - else - _axis = axis_descendant_or_self; - - _left = _left->_left; - } - - // Use optimized lookup table implementation for translate() with constant arguments - if (_type == ast_func_translate && - _right && // workaround for clang static analyzer (_right is never null for ast_func_translate) - _right->_type == ast_string_constant && _right->_next->_type == ast_string_constant) - { - unsigned char* table = translate_table_generate(alloc, _right->_data.string, _right->_next->_data.string); - - if (table) - { - _type = ast_opt_translate_table; - _data.table = table; - } - } - - // Use optimized path for @attr = 'value' or @attr = $value - if (_type == ast_op_equal && - _left && _right && // workaround for clang static analyzer and Coverity (_left and _right are never null for ast_op_equal) - // coverity[mixed_enums] - _left->_type == ast_step && _left->_axis == axis_attribute && _left->_test == nodetest_name && !_left->_left && !_left->_right && - (_right->_type == ast_string_constant || (_right->_type == ast_variable && _right->_rettype == xpath_type_string))) - { - _type = ast_opt_compare_attribute; - } - } - - bool is_posinv_expr() const - { - switch (_type) - { - case ast_func_position: - case ast_func_last: - return false; - - case ast_string_constant: - case ast_number_constant: - case ast_variable: - return true; - - case ast_step: - case ast_step_root: - return true; - - case ast_predicate: - case ast_filter: - return true; - - default: - if (_left && !_left->is_posinv_expr()) return false; - - for (xpath_ast_node* n = _right; n; n = n->_next) - if (!n->is_posinv_expr()) return false; - - return true; - } - } - - bool is_posinv_step() const - { - assert(_type == ast_step); - - for (xpath_ast_node* n = _right; n; n = n->_next) - { - assert(n->_type == ast_predicate); - - if (n->_test != predicate_posinv) - return false; - } - - return true; - } - - xpath_value_type rettype() const - { - return static_cast<xpath_value_type>(_rettype); - } - }; - - static const size_t xpath_ast_depth_limit = - #ifdef PUGIXML_XPATH_DEPTH_LIMIT - PUGIXML_XPATH_DEPTH_LIMIT - #else - 1024 - #endif - ; - - struct xpath_parser - { - xpath_allocator* _alloc; - xpath_lexer _lexer; - - const char_t* _query; - xpath_variable_set* _variables; - - xpath_parse_result* _result; - - char_t _scratch[32]; - - size_t _depth; - - xpath_ast_node* error(const char* message) - { - _result->error = message; - _result->offset = _lexer.current_pos() - _query; - - return 0; - } - - xpath_ast_node* error_oom() - { - assert(_alloc->_error); - *_alloc->_error = true; - - return 0; - } - - xpath_ast_node* error_rec() - { - return error("Exceeded maximum allowed query depth"); - } - - void* alloc_node() - { - return _alloc->allocate(sizeof(xpath_ast_node)); - } - - xpath_ast_node* alloc_node(ast_type_t type, xpath_value_type rettype, const char_t* value) - { - void* memory = alloc_node(); - return memory ? new (memory) xpath_ast_node(type, rettype, value) : 0; - } - - xpath_ast_node* alloc_node(ast_type_t type, xpath_value_type rettype, double value) - { - void* memory = alloc_node(); - return memory ? new (memory) xpath_ast_node(type, rettype, value) : 0; - } - - xpath_ast_node* alloc_node(ast_type_t type, xpath_value_type rettype, xpath_variable* value) - { - void* memory = alloc_node(); - return memory ? new (memory) xpath_ast_node(type, rettype, value) : 0; - } - - xpath_ast_node* alloc_node(ast_type_t type, xpath_value_type rettype, xpath_ast_node* left = 0, xpath_ast_node* right = 0) - { - void* memory = alloc_node(); - return memory ? new (memory) xpath_ast_node(type, rettype, left, right) : 0; - } - - xpath_ast_node* alloc_node(ast_type_t type, xpath_ast_node* left, axis_t axis, nodetest_t test, const char_t* contents) - { - void* memory = alloc_node(); - return memory ? new (memory) xpath_ast_node(type, left, axis, test, contents) : 0; - } - - xpath_ast_node* alloc_node(ast_type_t type, xpath_ast_node* left, xpath_ast_node* right, predicate_t test) - { - void* memory = alloc_node(); - return memory ? new (memory) xpath_ast_node(type, left, right, test) : 0; - } - - const char_t* alloc_string(const xpath_lexer_string& value) - { - if (!value.begin) - return PUGIXML_TEXT(""); - - size_t length = static_cast<size_t>(value.end - value.begin); - - char_t* c = static_cast<char_t*>(_alloc->allocate((length + 1) * sizeof(char_t))); - if (!c) return 0; - - memcpy(c, value.begin, length * sizeof(char_t)); - c[length] = 0; - - return c; - } - - xpath_ast_node* parse_function(const xpath_lexer_string& name, size_t argc, xpath_ast_node* args[2]) - { - switch (name.begin[0]) - { - case 'b': - if (name == PUGIXML_TEXT("boolean") && argc == 1) - return alloc_node(ast_func_boolean, xpath_type_boolean, args[0]); - - break; - - case 'c': - if (name == PUGIXML_TEXT("count") && argc == 1) - { - if (args[0]->rettype() != xpath_type_node_set) return error("Function has to be applied to node set"); - return alloc_node(ast_func_count, xpath_type_number, args[0]); - } - else if (name == PUGIXML_TEXT("contains") && argc == 2) - return alloc_node(ast_func_contains, xpath_type_boolean, args[0], args[1]); - else if (name == PUGIXML_TEXT("concat") && argc >= 2) - return alloc_node(ast_func_concat, xpath_type_string, args[0], args[1]); - else if (name == PUGIXML_TEXT("ceiling") && argc == 1) - return alloc_node(ast_func_ceiling, xpath_type_number, args[0]); - - break; - - case 'f': - if (name == PUGIXML_TEXT("false") && argc == 0) - return alloc_node(ast_func_false, xpath_type_boolean); - else if (name == PUGIXML_TEXT("floor") && argc == 1) - return alloc_node(ast_func_floor, xpath_type_number, args[0]); - - break; - - case 'i': - if (name == PUGIXML_TEXT("id") && argc == 1) - return alloc_node(ast_func_id, xpath_type_node_set, args[0]); - - break; - - case 'l': - if (name == PUGIXML_TEXT("last") && argc == 0) - return alloc_node(ast_func_last, xpath_type_number); - else if (name == PUGIXML_TEXT("lang") && argc == 1) - return alloc_node(ast_func_lang, xpath_type_boolean, args[0]); - else if (name == PUGIXML_TEXT("local-name") && argc <= 1) - { - if (argc == 1 && args[0]->rettype() != xpath_type_node_set) return error("Function has to be applied to node set"); - return alloc_node(argc == 0 ? ast_func_local_name_0 : ast_func_local_name_1, xpath_type_string, args[0]); - } - - break; - - case 'n': - if (name == PUGIXML_TEXT("name") && argc <= 1) - { - if (argc == 1 && args[0]->rettype() != xpath_type_node_set) return error("Function has to be applied to node set"); - return alloc_node(argc == 0 ? ast_func_name_0 : ast_func_name_1, xpath_type_string, args[0]); - } - else if (name == PUGIXML_TEXT("namespace-uri") && argc <= 1) - { - if (argc == 1 && args[0]->rettype() != xpath_type_node_set) return error("Function has to be applied to node set"); - return alloc_node(argc == 0 ? ast_func_namespace_uri_0 : ast_func_namespace_uri_1, xpath_type_string, args[0]); - } - else if (name == PUGIXML_TEXT("normalize-space") && argc <= 1) - return alloc_node(argc == 0 ? ast_func_normalize_space_0 : ast_func_normalize_space_1, xpath_type_string, args[0], args[1]); - else if (name == PUGIXML_TEXT("not") && argc == 1) - return alloc_node(ast_func_not, xpath_type_boolean, args[0]); - else if (name == PUGIXML_TEXT("number") && argc <= 1) - return alloc_node(argc == 0 ? ast_func_number_0 : ast_func_number_1, xpath_type_number, args[0]); - - break; - - case 'p': - if (name == PUGIXML_TEXT("position") && argc == 0) - return alloc_node(ast_func_position, xpath_type_number); - - break; - - case 'r': - if (name == PUGIXML_TEXT("round") && argc == 1) - return alloc_node(ast_func_round, xpath_type_number, args[0]); - - break; - - case 's': - if (name == PUGIXML_TEXT("string") && argc <= 1) - return alloc_node(argc == 0 ? ast_func_string_0 : ast_func_string_1, xpath_type_string, args[0]); - else if (name == PUGIXML_TEXT("string-length") && argc <= 1) - return alloc_node(argc == 0 ? ast_func_string_length_0 : ast_func_string_length_1, xpath_type_number, args[0]); - else if (name == PUGIXML_TEXT("starts-with") && argc == 2) - return alloc_node(ast_func_starts_with, xpath_type_boolean, args[0], args[1]); - else if (name == PUGIXML_TEXT("substring-before") && argc == 2) - return alloc_node(ast_func_substring_before, xpath_type_string, args[0], args[1]); - else if (name == PUGIXML_TEXT("substring-after") && argc == 2) - return alloc_node(ast_func_substring_after, xpath_type_string, args[0], args[1]); - else if (name == PUGIXML_TEXT("substring") && (argc == 2 || argc == 3)) - return alloc_node(argc == 2 ? ast_func_substring_2 : ast_func_substring_3, xpath_type_string, args[0], args[1]); - else if (name == PUGIXML_TEXT("sum") && argc == 1) - { - if (args[0]->rettype() != xpath_type_node_set) return error("Function has to be applied to node set"); - return alloc_node(ast_func_sum, xpath_type_number, args[0]); - } - - break; - - case 't': - if (name == PUGIXML_TEXT("translate") && argc == 3) - return alloc_node(ast_func_translate, xpath_type_string, args[0], args[1]); - else if (name == PUGIXML_TEXT("true") && argc == 0) - return alloc_node(ast_func_true, xpath_type_boolean); - - break; - - default: - break; - } - - return error("Unrecognized function or wrong parameter count"); - } - - axis_t parse_axis_name(const xpath_lexer_string& name, bool& specified) - { - specified = true; - - switch (name.begin[0]) - { - case 'a': - if (name == PUGIXML_TEXT("ancestor")) - return axis_ancestor; - else if (name == PUGIXML_TEXT("ancestor-or-self")) - return axis_ancestor_or_self; - else if (name == PUGIXML_TEXT("attribute")) - return axis_attribute; - - break; - - case 'c': - if (name == PUGIXML_TEXT("child")) - return axis_child; - - break; - - case 'd': - if (name == PUGIXML_TEXT("descendant")) - return axis_descendant; - else if (name == PUGIXML_TEXT("descendant-or-self")) - return axis_descendant_or_self; - - break; - - case 'f': - if (name == PUGIXML_TEXT("following")) - return axis_following; - else if (name == PUGIXML_TEXT("following-sibling")) - return axis_following_sibling; - - break; - - case 'n': - if (name == PUGIXML_TEXT("namespace")) - return axis_namespace; - - break; - - case 'p': - if (name == PUGIXML_TEXT("parent")) - return axis_parent; - else if (name == PUGIXML_TEXT("preceding")) - return axis_preceding; - else if (name == PUGIXML_TEXT("preceding-sibling")) - return axis_preceding_sibling; - - break; - - case 's': - if (name == PUGIXML_TEXT("self")) - return axis_self; - - break; - - default: - break; - } - - specified = false; - return axis_child; - } - - nodetest_t parse_node_test_type(const xpath_lexer_string& name) - { - switch (name.begin[0]) - { - case 'c': - if (name == PUGIXML_TEXT("comment")) - return nodetest_type_comment; - - break; - - case 'n': - if (name == PUGIXML_TEXT("node")) - return nodetest_type_node; - - break; - - case 'p': - if (name == PUGIXML_TEXT("processing-instruction")) - return nodetest_type_pi; - - break; - - case 't': - if (name == PUGIXML_TEXT("text")) - return nodetest_type_text; - - break; - - default: - break; - } - - return nodetest_none; - } - - // PrimaryExpr ::= VariableReference | '(' Expr ')' | Literal | Number | FunctionCall - xpath_ast_node* parse_primary_expression() - { - switch (_lexer.current()) - { - case lex_var_ref: - { - xpath_lexer_string name = _lexer.contents(); - - if (!_variables) - return error("Unknown variable: variable set is not provided"); - - xpath_variable* var = 0; - if (!get_variable_scratch(_scratch, _variables, name.begin, name.end, &var)) - return error_oom(); - - if (!var) - return error("Unknown variable: variable set does not contain the given name"); - - _lexer.next(); - - return alloc_node(ast_variable, var->type(), var); - } - - case lex_open_brace: - { - _lexer.next(); - - xpath_ast_node* n = parse_expression(); - if (!n) return 0; - - if (_lexer.current() != lex_close_brace) - return error("Expected ')' to match an opening '('"); - - _lexer.next(); - - return n; - } - - case lex_quoted_string: - { - const char_t* value = alloc_string(_lexer.contents()); - if (!value) return 0; - - _lexer.next(); - - return alloc_node(ast_string_constant, xpath_type_string, value); - } - - case lex_number: - { - double value = 0; - - if (!convert_string_to_number_scratch(_scratch, _lexer.contents().begin, _lexer.contents().end, &value)) - return error_oom(); - - _lexer.next(); - - return alloc_node(ast_number_constant, xpath_type_number, value); - } - - case lex_string: - { - xpath_ast_node* args[2] = {0}; - size_t argc = 0; - - xpath_lexer_string function = _lexer.contents(); - _lexer.next(); - - xpath_ast_node* last_arg = 0; - - if (_lexer.current() != lex_open_brace) - return error("Unrecognized function call"); - _lexer.next(); - - size_t old_depth = _depth; - - while (_lexer.current() != lex_close_brace) - { - if (argc > 0) - { - if (_lexer.current() != lex_comma) - return error("No comma between function arguments"); - _lexer.next(); - } - - if (++_depth > xpath_ast_depth_limit) - return error_rec(); - - xpath_ast_node* n = parse_expression(); - if (!n) return 0; - - if (argc < 2) args[argc] = n; - else last_arg->set_next(n); - - argc++; - last_arg = n; - } - - _lexer.next(); - - _depth = old_depth; - - return parse_function(function, argc, args); - } - - default: - return error("Unrecognizable primary expression"); - } - } - - // FilterExpr ::= PrimaryExpr | FilterExpr Predicate - // Predicate ::= '[' PredicateExpr ']' - // PredicateExpr ::= Expr - xpath_ast_node* parse_filter_expression() - { - xpath_ast_node* n = parse_primary_expression(); - if (!n) return 0; - - size_t old_depth = _depth; - - while (_lexer.current() == lex_open_square_brace) - { - _lexer.next(); - - if (++_depth > xpath_ast_depth_limit) - return error_rec(); - - if (n->rettype() != xpath_type_node_set) - return error("Predicate has to be applied to node set"); - - xpath_ast_node* expr = parse_expression(); - if (!expr) return 0; - - n = alloc_node(ast_filter, n, expr, predicate_default); - if (!n) return 0; - - if (_lexer.current() != lex_close_square_brace) - return error("Expected ']' to match an opening '['"); - - _lexer.next(); - } - - _depth = old_depth; - - return n; - } - - // Step ::= AxisSpecifier NodeTest Predicate* | AbbreviatedStep - // AxisSpecifier ::= AxisName '::' | '@'? - // NodeTest ::= NameTest | NodeType '(' ')' | 'processing-instruction' '(' Literal ')' - // NameTest ::= '*' | NCName ':' '*' | QName - // AbbreviatedStep ::= '.' | '..' - xpath_ast_node* parse_step(xpath_ast_node* set) - { - if (set && set->rettype() != xpath_type_node_set) - return error("Step has to be applied to node set"); - - bool axis_specified = false; - axis_t axis = axis_child; // implied child axis - - if (_lexer.current() == lex_axis_attribute) - { - axis = axis_attribute; - axis_specified = true; - - _lexer.next(); - } - else if (_lexer.current() == lex_dot) - { - _lexer.next(); - - if (_lexer.current() == lex_open_square_brace) - return error("Predicates are not allowed after an abbreviated step"); - - return alloc_node(ast_step, set, axis_self, nodetest_type_node, 0); - } - else if (_lexer.current() == lex_double_dot) - { - _lexer.next(); - - if (_lexer.current() == lex_open_square_brace) - return error("Predicates are not allowed after an abbreviated step"); - - return alloc_node(ast_step, set, axis_parent, nodetest_type_node, 0); - } - - nodetest_t nt_type = nodetest_none; - xpath_lexer_string nt_name; - - if (_lexer.current() == lex_string) - { - // node name test - nt_name = _lexer.contents(); - _lexer.next(); - - // was it an axis name? - if (_lexer.current() == lex_double_colon) - { - // parse axis name - if (axis_specified) - return error("Two axis specifiers in one step"); - - axis = parse_axis_name(nt_name, axis_specified); - - if (!axis_specified) - return error("Unknown axis"); - - // read actual node test - _lexer.next(); - - if (_lexer.current() == lex_multiply) - { - nt_type = nodetest_all; - nt_name = xpath_lexer_string(); - _lexer.next(); - } - else if (_lexer.current() == lex_string) - { - nt_name = _lexer.contents(); - _lexer.next(); - } - else - { - return error("Unrecognized node test"); - } - } - - if (nt_type == nodetest_none) - { - // node type test or processing-instruction - if (_lexer.current() == lex_open_brace) - { - _lexer.next(); - - if (_lexer.current() == lex_close_brace) - { - _lexer.next(); - - nt_type = parse_node_test_type(nt_name); - - if (nt_type == nodetest_none) - return error("Unrecognized node type"); - - nt_name = xpath_lexer_string(); - } - else if (nt_name == PUGIXML_TEXT("processing-instruction")) - { - if (_lexer.current() != lex_quoted_string) - return error("Only literals are allowed as arguments to processing-instruction()"); - - nt_type = nodetest_pi; - nt_name = _lexer.contents(); - _lexer.next(); - - if (_lexer.current() != lex_close_brace) - return error("Unmatched brace near processing-instruction()"); - _lexer.next(); - } - else - { - return error("Unmatched brace near node type test"); - } - } - // QName or NCName:* - else - { - if (nt_name.end - nt_name.begin > 2 && nt_name.end[-2] == ':' && nt_name.end[-1] == '*') // NCName:* - { - nt_name.end--; // erase * - - nt_type = nodetest_all_in_namespace; - } - else - { - nt_type = nodetest_name; - } - } - } - } - else if (_lexer.current() == lex_multiply) - { - nt_type = nodetest_all; - _lexer.next(); - } - else - { - return error("Unrecognized node test"); - } - - const char_t* nt_name_copy = alloc_string(nt_name); - if (!nt_name_copy) return 0; - - xpath_ast_node* n = alloc_node(ast_step, set, axis, nt_type, nt_name_copy); - if (!n) return 0; - - size_t old_depth = _depth; - - xpath_ast_node* last = 0; - - while (_lexer.current() == lex_open_square_brace) - { - _lexer.next(); - - if (++_depth > xpath_ast_depth_limit) - return error_rec(); - - xpath_ast_node* expr = parse_expression(); - if (!expr) return 0; - - xpath_ast_node* pred = alloc_node(ast_predicate, 0, expr, predicate_default); - if (!pred) return 0; - - if (_lexer.current() != lex_close_square_brace) - return error("Expected ']' to match an opening '['"); - _lexer.next(); - - if (last) last->set_next(pred); - else n->set_right(pred); - - last = pred; - } - - _depth = old_depth; - - return n; - } - - // RelativeLocationPath ::= Step | RelativeLocationPath '/' Step | RelativeLocationPath '//' Step - xpath_ast_node* parse_relative_location_path(xpath_ast_node* set) - { - xpath_ast_node* n = parse_step(set); - if (!n) return 0; - - size_t old_depth = _depth; - - while (_lexer.current() == lex_slash || _lexer.current() == lex_double_slash) - { - lexeme_t l = _lexer.current(); - _lexer.next(); - - if (++_depth > xpath_ast_depth_limit) - return error_rec(); - - if (l == lex_double_slash) - { - n = alloc_node(ast_step, n, axis_descendant_or_self, nodetest_type_node, 0); - if (!n) return 0; - } - - n = parse_step(n); - if (!n) return 0; - } - - _depth = old_depth; - - return n; - } - - // LocationPath ::= RelativeLocationPath | AbsoluteLocationPath - // AbsoluteLocationPath ::= '/' RelativeLocationPath? | '//' RelativeLocationPath - xpath_ast_node* parse_location_path() - { - if (_lexer.current() == lex_slash) - { - _lexer.next(); - - xpath_ast_node* n = alloc_node(ast_step_root, xpath_type_node_set); - if (!n) return 0; - - // relative location path can start from axis_attribute, dot, double_dot, multiply and string lexemes; any other lexeme means standalone root path - lexeme_t l = _lexer.current(); - - if (l == lex_string || l == lex_axis_attribute || l == lex_dot || l == lex_double_dot || l == lex_multiply) - return parse_relative_location_path(n); - else - return n; - } - else if (_lexer.current() == lex_double_slash) - { - _lexer.next(); - - xpath_ast_node* n = alloc_node(ast_step_root, xpath_type_node_set); - if (!n) return 0; - - n = alloc_node(ast_step, n, axis_descendant_or_self, nodetest_type_node, 0); - if (!n) return 0; - - return parse_relative_location_path(n); - } - - // else clause moved outside of if because of bogus warning 'control may reach end of non-void function being inlined' in gcc 4.0.1 - return parse_relative_location_path(0); - } - - // PathExpr ::= LocationPath - // | FilterExpr - // | FilterExpr '/' RelativeLocationPath - // | FilterExpr '//' RelativeLocationPath - // UnionExpr ::= PathExpr | UnionExpr '|' PathExpr - // UnaryExpr ::= UnionExpr | '-' UnaryExpr - xpath_ast_node* parse_path_or_unary_expression() - { - // Clarification. - // PathExpr begins with either LocationPath or FilterExpr. - // FilterExpr begins with PrimaryExpr - // PrimaryExpr begins with '$' in case of it being a variable reference, - // '(' in case of it being an expression, string literal, number constant or - // function call. - if (_lexer.current() == lex_var_ref || _lexer.current() == lex_open_brace || - _lexer.current() == lex_quoted_string || _lexer.current() == lex_number || - _lexer.current() == lex_string) - { - if (_lexer.current() == lex_string) - { - // This is either a function call, or not - if not, we shall proceed with location path - const char_t* state = _lexer.state(); - - while (PUGI__IS_CHARTYPE(*state, ct_space)) ++state; - - if (*state != '(') - return parse_location_path(); - - // This looks like a function call; however this still can be a node-test. Check it. - if (parse_node_test_type(_lexer.contents()) != nodetest_none) - return parse_location_path(); - } - - xpath_ast_node* n = parse_filter_expression(); - if (!n) return 0; - - if (_lexer.current() == lex_slash || _lexer.current() == lex_double_slash) - { - lexeme_t l = _lexer.current(); - _lexer.next(); - - if (l == lex_double_slash) - { - if (n->rettype() != xpath_type_node_set) - return error("Step has to be applied to node set"); - - n = alloc_node(ast_step, n, axis_descendant_or_self, nodetest_type_node, 0); - if (!n) return 0; - } - - // select from location path - return parse_relative_location_path(n); - } - - return n; - } - else if (_lexer.current() == lex_minus) - { - _lexer.next(); - - // precedence 7+ - only parses union expressions - xpath_ast_node* n = parse_expression(7); - if (!n) return 0; - - return alloc_node(ast_op_negate, xpath_type_number, n); - } - else - { - return parse_location_path(); - } - } - - struct binary_op_t - { - ast_type_t asttype; - xpath_value_type rettype; - int precedence; - - binary_op_t(): asttype(ast_unknown), rettype(xpath_type_none), precedence(0) - { - } - - binary_op_t(ast_type_t asttype_, xpath_value_type rettype_, int precedence_): asttype(asttype_), rettype(rettype_), precedence(precedence_) - { - } - - static binary_op_t parse(xpath_lexer& lexer) - { - switch (lexer.current()) - { - case lex_string: - if (lexer.contents() == PUGIXML_TEXT("or")) - return binary_op_t(ast_op_or, xpath_type_boolean, 1); - else if (lexer.contents() == PUGIXML_TEXT("and")) - return binary_op_t(ast_op_and, xpath_type_boolean, 2); - else if (lexer.contents() == PUGIXML_TEXT("div")) - return binary_op_t(ast_op_divide, xpath_type_number, 6); - else if (lexer.contents() == PUGIXML_TEXT("mod")) - return binary_op_t(ast_op_mod, xpath_type_number, 6); - else - return binary_op_t(); - - case lex_equal: - return binary_op_t(ast_op_equal, xpath_type_boolean, 3); - - case lex_not_equal: - return binary_op_t(ast_op_not_equal, xpath_type_boolean, 3); - - case lex_less: - return binary_op_t(ast_op_less, xpath_type_boolean, 4); - - case lex_greater: - return binary_op_t(ast_op_greater, xpath_type_boolean, 4); - - case lex_less_or_equal: - return binary_op_t(ast_op_less_or_equal, xpath_type_boolean, 4); - - case lex_greater_or_equal: - return binary_op_t(ast_op_greater_or_equal, xpath_type_boolean, 4); - - case lex_plus: - return binary_op_t(ast_op_add, xpath_type_number, 5); - - case lex_minus: - return binary_op_t(ast_op_subtract, xpath_type_number, 5); - - case lex_multiply: - return binary_op_t(ast_op_multiply, xpath_type_number, 6); - - case lex_union: - return binary_op_t(ast_op_union, xpath_type_node_set, 7); - - default: - return binary_op_t(); - } - } - }; - - xpath_ast_node* parse_expression_rec(xpath_ast_node* lhs, int limit) - { - binary_op_t op = binary_op_t::parse(_lexer); - - while (op.asttype != ast_unknown && op.precedence >= limit) - { - _lexer.next(); - - if (++_depth > xpath_ast_depth_limit) - return error_rec(); - - xpath_ast_node* rhs = parse_path_or_unary_expression(); - if (!rhs) return 0; - - binary_op_t nextop = binary_op_t::parse(_lexer); - - while (nextop.asttype != ast_unknown && nextop.precedence > op.precedence) - { - rhs = parse_expression_rec(rhs, nextop.precedence); - if (!rhs) return 0; - - nextop = binary_op_t::parse(_lexer); - } - - if (op.asttype == ast_op_union && (lhs->rettype() != xpath_type_node_set || rhs->rettype() != xpath_type_node_set)) - return error("Union operator has to be applied to node sets"); - - lhs = alloc_node(op.asttype, op.rettype, lhs, rhs); - if (!lhs) return 0; - - op = binary_op_t::parse(_lexer); - } - - return lhs; - } - - // Expr ::= OrExpr - // OrExpr ::= AndExpr | OrExpr 'or' AndExpr - // AndExpr ::= EqualityExpr | AndExpr 'and' EqualityExpr - // EqualityExpr ::= RelationalExpr - // | EqualityExpr '=' RelationalExpr - // | EqualityExpr '!=' RelationalExpr - // RelationalExpr ::= AdditiveExpr - // | RelationalExpr '<' AdditiveExpr - // | RelationalExpr '>' AdditiveExpr - // | RelationalExpr '<=' AdditiveExpr - // | RelationalExpr '>=' AdditiveExpr - // AdditiveExpr ::= MultiplicativeExpr - // | AdditiveExpr '+' MultiplicativeExpr - // | AdditiveExpr '-' MultiplicativeExpr - // MultiplicativeExpr ::= UnaryExpr - // | MultiplicativeExpr '*' UnaryExpr - // | MultiplicativeExpr 'div' UnaryExpr - // | MultiplicativeExpr 'mod' UnaryExpr - xpath_ast_node* parse_expression(int limit = 0) - { - size_t old_depth = _depth; - - if (++_depth > xpath_ast_depth_limit) - return error_rec(); - - xpath_ast_node* n = parse_path_or_unary_expression(); - if (!n) return 0; - - n = parse_expression_rec(n, limit); - - _depth = old_depth; - - return n; - } - - xpath_parser(const char_t* query, xpath_variable_set* variables, xpath_allocator* alloc, xpath_parse_result* result): _alloc(alloc), _lexer(query), _query(query), _variables(variables), _result(result), _depth(0) - { - } - - xpath_ast_node* parse() - { - xpath_ast_node* n = parse_expression(); - if (!n) return 0; - - assert(_depth == 0); - - // check if there are unparsed tokens left - if (_lexer.current() != lex_eof) - return error("Incorrect query"); - - return n; - } - - static xpath_ast_node* parse(const char_t* query, xpath_variable_set* variables, xpath_allocator* alloc, xpath_parse_result* result) - { - xpath_parser parser(query, variables, alloc, result); - - return parser.parse(); - } - }; - - struct xpath_query_impl - { - static xpath_query_impl* create() - { - void* memory = xml_memory::allocate(sizeof(xpath_query_impl)); - if (!memory) return 0; - - return new (memory) xpath_query_impl(); - } - - static void destroy(xpath_query_impl* impl) - { - // free all allocated pages - impl->alloc.release(); - - // free allocator memory (with the first page) - xml_memory::deallocate(impl); - } - - xpath_query_impl(): root(0), alloc(&block, &oom), oom(false) - { - block.next = 0; - block.capacity = sizeof(block.data); - } - - xpath_ast_node* root; - xpath_allocator alloc; - xpath_memory_block block; - bool oom; - }; - - PUGI__FN impl::xpath_ast_node* evaluate_node_set_prepare(xpath_query_impl* impl) - { - if (!impl) return 0; - - if (impl->root->rettype() != xpath_type_node_set) - { - #ifdef PUGIXML_NO_EXCEPTIONS - return 0; - #else - xpath_parse_result res; - res.error = "Expression does not evaluate to node set"; - - throw xpath_exception(res); - #endif - } - - return impl->root; - } -PUGI__NS_END - -namespace pugi -{ -#ifndef PUGIXML_NO_EXCEPTIONS - PUGI__FN xpath_exception::xpath_exception(const xpath_parse_result& result_): _result(result_) - { - assert(_result.error); - } - - PUGI__FN const char* xpath_exception::what() const throw() - { - return _result.error; - } - - PUGI__FN const xpath_parse_result& xpath_exception::result() const - { - return _result; - } -#endif - - PUGI__FN xpath_node::xpath_node() - { - } - - PUGI__FN xpath_node::xpath_node(const xml_node& node_): _node(node_) - { - } - - PUGI__FN xpath_node::xpath_node(const xml_attribute& attribute_, const xml_node& parent_): _node(attribute_ ? parent_ : xml_node()), _attribute(attribute_) - { - } - - PUGI__FN xml_node xpath_node::node() const - { - return _attribute ? xml_node() : _node; - } - - PUGI__FN xml_attribute xpath_node::attribute() const - { - return _attribute; - } - - PUGI__FN xml_node xpath_node::parent() const - { - return _attribute ? _node : _node.parent(); - } - - PUGI__FN static void unspecified_bool_xpath_node(xpath_node***) - { - } - - PUGI__FN xpath_node::operator xpath_node::unspecified_bool_type() const - { - return (_node || _attribute) ? unspecified_bool_xpath_node : 0; - } - - PUGI__FN bool xpath_node::operator!() const - { - return !(_node || _attribute); - } - - PUGI__FN bool xpath_node::operator==(const xpath_node& n) const - { - return _node == n._node && _attribute == n._attribute; - } - - PUGI__FN bool xpath_node::operator!=(const xpath_node& n) const - { - return _node != n._node || _attribute != n._attribute; - } - -#ifdef __BORLANDC__ - PUGI__FN bool operator&&(const xpath_node& lhs, bool rhs) - { - return (bool)lhs && rhs; - } - - PUGI__FN bool operator||(const xpath_node& lhs, bool rhs) - { - return (bool)lhs || rhs; - } -#endif - - PUGI__FN void xpath_node_set::_assign(const_iterator begin_, const_iterator end_, type_t type_) - { - assert(begin_ <= end_); - - size_t size_ = static_cast<size_t>(end_ - begin_); - - // use internal buffer for 0 or 1 elements, heap buffer otherwise - xpath_node* storage = (size_ <= 1) ? _storage : static_cast<xpath_node*>(impl::xml_memory::allocate(size_ * sizeof(xpath_node))); - - if (!storage) - { - #ifdef PUGIXML_NO_EXCEPTIONS - return; - #else - throw std::bad_alloc(); - #endif - } - - // deallocate old buffer - if (_begin != _storage) - impl::xml_memory::deallocate(_begin); - - // size check is necessary because for begin_ = end_ = nullptr, memcpy is UB - if (size_) - memcpy(storage, begin_, size_ * sizeof(xpath_node)); - - _begin = storage; - _end = storage + size_; - _type = type_; - } - -#ifdef PUGIXML_HAS_MOVE - PUGI__FN void xpath_node_set::_move(xpath_node_set& rhs) PUGIXML_NOEXCEPT - { - _type = rhs._type; - _storage[0] = rhs._storage[0]; - _begin = (rhs._begin == rhs._storage) ? _storage : rhs._begin; - _end = _begin + (rhs._end - rhs._begin); - - rhs._type = type_unsorted; - rhs._begin = rhs._storage; - rhs._end = rhs._storage; - } -#endif - - PUGI__FN xpath_node_set::xpath_node_set(): _type(type_unsorted), _begin(_storage), _end(_storage) - { - } - - PUGI__FN xpath_node_set::xpath_node_set(const_iterator begin_, const_iterator end_, type_t type_): _type(type_unsorted), _begin(_storage), _end(_storage) - { - _assign(begin_, end_, type_); - } - - PUGI__FN xpath_node_set::~xpath_node_set() - { - if (_begin != _storage) - impl::xml_memory::deallocate(_begin); - } - - PUGI__FN xpath_node_set::xpath_node_set(const xpath_node_set& ns): _type(type_unsorted), _begin(_storage), _end(_storage) - { - _assign(ns._begin, ns._end, ns._type); - } - - PUGI__FN xpath_node_set& xpath_node_set::operator=(const xpath_node_set& ns) - { - if (this == &ns) return *this; - - _assign(ns._begin, ns._end, ns._type); - - return *this; - } - -#ifdef PUGIXML_HAS_MOVE - PUGI__FN xpath_node_set::xpath_node_set(xpath_node_set&& rhs) PUGIXML_NOEXCEPT: _type(type_unsorted), _begin(_storage), _end(_storage) - { - _move(rhs); - } - - PUGI__FN xpath_node_set& xpath_node_set::operator=(xpath_node_set&& rhs) PUGIXML_NOEXCEPT - { - if (this == &rhs) return *this; - - if (_begin != _storage) - impl::xml_memory::deallocate(_begin); - - _move(rhs); - - return *this; - } -#endif - - PUGI__FN xpath_node_set::type_t xpath_node_set::type() const - { - return _type; - } - - PUGI__FN size_t xpath_node_set::size() const - { - return _end - _begin; - } - - PUGI__FN bool xpath_node_set::empty() const - { - return _begin == _end; - } - - PUGI__FN const xpath_node& xpath_node_set::operator[](size_t index) const - { - assert(index < size()); - return _begin[index]; - } - - PUGI__FN xpath_node_set::const_iterator xpath_node_set::begin() const - { - return _begin; - } - - PUGI__FN xpath_node_set::const_iterator xpath_node_set::end() const - { - return _end; - } - - PUGI__FN void xpath_node_set::sort(bool reverse) - { - _type = impl::xpath_sort(_begin, _end, _type, reverse); - } - - PUGI__FN xpath_node xpath_node_set::first() const - { - return impl::xpath_first(_begin, _end, _type); - } - - PUGI__FN xpath_parse_result::xpath_parse_result(): error("Internal error"), offset(0) - { - } - - PUGI__FN xpath_parse_result::operator bool() const - { - return error == 0; - } - - PUGI__FN const char* xpath_parse_result::description() const - { - return error ? error : "No error"; - } - - PUGI__FN xpath_variable::xpath_variable(xpath_value_type type_): _type(type_), _next(0) - { - } - - PUGI__FN const char_t* xpath_variable::name() const - { - switch (_type) - { - case xpath_type_node_set: - return static_cast<const impl::xpath_variable_node_set*>(this)->name; - - case xpath_type_number: - return static_cast<const impl::xpath_variable_number*>(this)->name; - - case xpath_type_string: - return static_cast<const impl::xpath_variable_string*>(this)->name; - - case xpath_type_boolean: - return static_cast<const impl::xpath_variable_boolean*>(this)->name; - - default: - assert(false && "Invalid variable type"); // unreachable - return 0; - } - } - - PUGI__FN xpath_value_type xpath_variable::type() const - { - return _type; - } - - PUGI__FN bool xpath_variable::get_boolean() const - { - return (_type == xpath_type_boolean) ? static_cast<const impl::xpath_variable_boolean*>(this)->value : false; - } - - PUGI__FN double xpath_variable::get_number() const - { - return (_type == xpath_type_number) ? static_cast<const impl::xpath_variable_number*>(this)->value : impl::gen_nan(); - } - - PUGI__FN const char_t* xpath_variable::get_string() const - { - const char_t* value = (_type == xpath_type_string) ? static_cast<const impl::xpath_variable_string*>(this)->value : 0; - return value ? value : PUGIXML_TEXT(""); - } - - PUGI__FN const xpath_node_set& xpath_variable::get_node_set() const - { - return (_type == xpath_type_node_set) ? static_cast<const impl::xpath_variable_node_set*>(this)->value : impl::dummy_node_set; - } - - PUGI__FN bool xpath_variable::set(bool value) - { - if (_type != xpath_type_boolean) return false; - - static_cast<impl::xpath_variable_boolean*>(this)->value = value; - return true; - } - - PUGI__FN bool xpath_variable::set(double value) - { - if (_type != xpath_type_number) return false; - - static_cast<impl::xpath_variable_number*>(this)->value = value; - return true; - } - - PUGI__FN bool xpath_variable::set(const char_t* value) - { - if (_type != xpath_type_string) return false; - - impl::xpath_variable_string* var = static_cast<impl::xpath_variable_string*>(this); - - // duplicate string - size_t size = (impl::strlength(value) + 1) * sizeof(char_t); - - char_t* copy = static_cast<char_t*>(impl::xml_memory::allocate(size)); - if (!copy) return false; - - memcpy(copy, value, size); - - // replace old string - if (var->value) impl::xml_memory::deallocate(var->value); - var->value = copy; - - return true; - } - - PUGI__FN bool xpath_variable::set(const xpath_node_set& value) - { - if (_type != xpath_type_node_set) return false; - - static_cast<impl::xpath_variable_node_set*>(this)->value = value; - return true; - } - - PUGI__FN xpath_variable_set::xpath_variable_set() - { - for (size_t i = 0; i < sizeof(_data) / sizeof(_data[0]); ++i) - _data[i] = 0; - } - - PUGI__FN xpath_variable_set::~xpath_variable_set() - { - for (size_t i = 0; i < sizeof(_data) / sizeof(_data[0]); ++i) - _destroy(_data[i]); - } - - PUGI__FN xpath_variable_set::xpath_variable_set(const xpath_variable_set& rhs) - { - for (size_t i = 0; i < sizeof(_data) / sizeof(_data[0]); ++i) - _data[i] = 0; - - _assign(rhs); - } - - PUGI__FN xpath_variable_set& xpath_variable_set::operator=(const xpath_variable_set& rhs) - { - if (this == &rhs) return *this; - - _assign(rhs); - - return *this; - } - -#ifdef PUGIXML_HAS_MOVE - PUGI__FN xpath_variable_set::xpath_variable_set(xpath_variable_set&& rhs) PUGIXML_NOEXCEPT - { - for (size_t i = 0; i < sizeof(_data) / sizeof(_data[0]); ++i) - { - _data[i] = rhs._data[i]; - rhs._data[i] = 0; - } - } - - PUGI__FN xpath_variable_set& xpath_variable_set::operator=(xpath_variable_set&& rhs) PUGIXML_NOEXCEPT - { - for (size_t i = 0; i < sizeof(_data) / sizeof(_data[0]); ++i) - { - _destroy(_data[i]); - - _data[i] = rhs._data[i]; - rhs._data[i] = 0; - } - - return *this; - } -#endif - - PUGI__FN void xpath_variable_set::_assign(const xpath_variable_set& rhs) - { - xpath_variable_set temp; - - for (size_t i = 0; i < sizeof(_data) / sizeof(_data[0]); ++i) - if (rhs._data[i] && !_clone(rhs._data[i], &temp._data[i])) - return; - - _swap(temp); - } - - PUGI__FN void xpath_variable_set::_swap(xpath_variable_set& rhs) - { - for (size_t i = 0; i < sizeof(_data) / sizeof(_data[0]); ++i) - { - xpath_variable* chain = _data[i]; - - _data[i] = rhs._data[i]; - rhs._data[i] = chain; - } - } - - PUGI__FN xpath_variable* xpath_variable_set::_find(const char_t* name) const - { - const size_t hash_size = sizeof(_data) / sizeof(_data[0]); - size_t hash = impl::hash_string(name) % hash_size; - - // look for existing variable - for (xpath_variable* var = _data[hash]; var; var = var->_next) - if (impl::strequal(var->name(), name)) - return var; - - return 0; - } - - PUGI__FN bool xpath_variable_set::_clone(xpath_variable* var, xpath_variable** out_result) - { - xpath_variable* last = 0; - - while (var) - { - // allocate storage for new variable - xpath_variable* nvar = impl::new_xpath_variable(var->_type, var->name()); - if (!nvar) return false; - - // link the variable to the result immediately to handle failures gracefully - if (last) - last->_next = nvar; - else - *out_result = nvar; - - last = nvar; - - // copy the value; this can fail due to out-of-memory conditions - if (!impl::copy_xpath_variable(nvar, var)) return false; - - var = var->_next; - } - - return true; - } - - PUGI__FN void xpath_variable_set::_destroy(xpath_variable* var) - { - while (var) - { - xpath_variable* next = var->_next; - - impl::delete_xpath_variable(var->_type, var); - - var = next; - } - } - - PUGI__FN xpath_variable* xpath_variable_set::add(const char_t* name, xpath_value_type type) - { - const size_t hash_size = sizeof(_data) / sizeof(_data[0]); - size_t hash = impl::hash_string(name) % hash_size; - - // look for existing variable - for (xpath_variable* var = _data[hash]; var; var = var->_next) - if (impl::strequal(var->name(), name)) - return var->type() == type ? var : 0; - - // add new variable - xpath_variable* result = impl::new_xpath_variable(type, name); - - if (result) - { - result->_next = _data[hash]; - - _data[hash] = result; - } - - return result; - } - - PUGI__FN bool xpath_variable_set::set(const char_t* name, bool value) - { - xpath_variable* var = add(name, xpath_type_boolean); - return var ? var->set(value) : false; - } - - PUGI__FN bool xpath_variable_set::set(const char_t* name, double value) - { - xpath_variable* var = add(name, xpath_type_number); - return var ? var->set(value) : false; - } - - PUGI__FN bool xpath_variable_set::set(const char_t* name, const char_t* value) - { - xpath_variable* var = add(name, xpath_type_string); - return var ? var->set(value) : false; - } - - PUGI__FN bool xpath_variable_set::set(const char_t* name, const xpath_node_set& value) - { - xpath_variable* var = add(name, xpath_type_node_set); - return var ? var->set(value) : false; - } - - PUGI__FN xpath_variable* xpath_variable_set::get(const char_t* name) - { - return _find(name); - } - - PUGI__FN const xpath_variable* xpath_variable_set::get(const char_t* name) const - { - return _find(name); - } - - PUGI__FN xpath_query::xpath_query(const char_t* query, xpath_variable_set* variables): _impl(0) - { - impl::xpath_query_impl* qimpl = impl::xpath_query_impl::create(); - - if (!qimpl) - { - #ifdef PUGIXML_NO_EXCEPTIONS - _result.error = "Out of memory"; - #else - throw std::bad_alloc(); - #endif - } - else - { - using impl::auto_deleter; // MSVC7 workaround - auto_deleter<impl::xpath_query_impl> impl(qimpl, impl::xpath_query_impl::destroy); - - qimpl->root = impl::xpath_parser::parse(query, variables, &qimpl->alloc, &_result); - - if (qimpl->root) - { - qimpl->root->optimize(&qimpl->alloc); - - _impl = impl.release(); - _result.error = 0; - } - else - { - #ifdef PUGIXML_NO_EXCEPTIONS - if (qimpl->oom) _result.error = "Out of memory"; - #else - if (qimpl->oom) throw std::bad_alloc(); - throw xpath_exception(_result); - #endif - } - } - } - - PUGI__FN xpath_query::xpath_query(): _impl(0) - { - } - - PUGI__FN xpath_query::~xpath_query() - { - if (_impl) - impl::xpath_query_impl::destroy(static_cast<impl::xpath_query_impl*>(_impl)); - } - -#ifdef PUGIXML_HAS_MOVE - PUGI__FN xpath_query::xpath_query(xpath_query&& rhs) PUGIXML_NOEXCEPT - { - _impl = rhs._impl; - _result = rhs._result; - rhs._impl = 0; - rhs._result = xpath_parse_result(); - } - - PUGI__FN xpath_query& xpath_query::operator=(xpath_query&& rhs) PUGIXML_NOEXCEPT - { - if (this == &rhs) return *this; - - if (_impl) - impl::xpath_query_impl::destroy(static_cast<impl::xpath_query_impl*>(_impl)); - - _impl = rhs._impl; - _result = rhs._result; - rhs._impl = 0; - rhs._result = xpath_parse_result(); - - return *this; - } -#endif - - PUGI__FN xpath_value_type xpath_query::return_type() const - { - if (!_impl) return xpath_type_none; - - return static_cast<impl::xpath_query_impl*>(_impl)->root->rettype(); - } - - PUGI__FN bool xpath_query::evaluate_boolean(const xpath_node& n) const - { - if (!_impl) return false; - - impl::xpath_context c(n, 1, 1); - impl::xpath_stack_data sd; - - bool r = static_cast<impl::xpath_query_impl*>(_impl)->root->eval_boolean(c, sd.stack); - - if (sd.oom) - { - #ifdef PUGIXML_NO_EXCEPTIONS - return false; - #else - throw std::bad_alloc(); - #endif - } - - return r; - } - - PUGI__FN double xpath_query::evaluate_number(const xpath_node& n) const - { - if (!_impl) return impl::gen_nan(); - - impl::xpath_context c(n, 1, 1); - impl::xpath_stack_data sd; - - double r = static_cast<impl::xpath_query_impl*>(_impl)->root->eval_number(c, sd.stack); - - if (sd.oom) - { - #ifdef PUGIXML_NO_EXCEPTIONS - return impl::gen_nan(); - #else - throw std::bad_alloc(); - #endif - } - - return r; - } - -#ifndef PUGIXML_NO_STL - PUGI__FN string_t xpath_query::evaluate_string(const xpath_node& n) const - { - if (!_impl) return string_t(); - - impl::xpath_context c(n, 1, 1); - impl::xpath_stack_data sd; - - impl::xpath_string r = static_cast<impl::xpath_query_impl*>(_impl)->root->eval_string(c, sd.stack); - - if (sd.oom) - { - #ifdef PUGIXML_NO_EXCEPTIONS - return string_t(); - #else - throw std::bad_alloc(); - #endif - } - - return string_t(r.c_str(), r.length()); - } -#endif - - PUGI__FN size_t xpath_query::evaluate_string(char_t* buffer, size_t capacity, const xpath_node& n) const - { - impl::xpath_context c(n, 1, 1); - impl::xpath_stack_data sd; - - impl::xpath_string r = _impl ? static_cast<impl::xpath_query_impl*>(_impl)->root->eval_string(c, sd.stack) : impl::xpath_string(); - - if (sd.oom) - { - #ifdef PUGIXML_NO_EXCEPTIONS - r = impl::xpath_string(); - #else - throw std::bad_alloc(); - #endif - } - - size_t full_size = r.length() + 1; - - if (capacity > 0) - { - size_t size = (full_size < capacity) ? full_size : capacity; - assert(size > 0); - - memcpy(buffer, r.c_str(), (size - 1) * sizeof(char_t)); - buffer[size - 1] = 0; - } - - return full_size; - } - - PUGI__FN xpath_node_set xpath_query::evaluate_node_set(const xpath_node& n) const - { - impl::xpath_ast_node* root = impl::evaluate_node_set_prepare(static_cast<impl::xpath_query_impl*>(_impl)); - if (!root) return xpath_node_set(); - - impl::xpath_context c(n, 1, 1); - impl::xpath_stack_data sd; - - impl::xpath_node_set_raw r = root->eval_node_set(c, sd.stack, impl::nodeset_eval_all); - - if (sd.oom) - { - #ifdef PUGIXML_NO_EXCEPTIONS - return xpath_node_set(); - #else - throw std::bad_alloc(); - #endif - } - - return xpath_node_set(r.begin(), r.end(), r.type()); - } - - PUGI__FN xpath_node xpath_query::evaluate_node(const xpath_node& n) const - { - impl::xpath_ast_node* root = impl::evaluate_node_set_prepare(static_cast<impl::xpath_query_impl*>(_impl)); - if (!root) return xpath_node(); - - impl::xpath_context c(n, 1, 1); - impl::xpath_stack_data sd; - - impl::xpath_node_set_raw r = root->eval_node_set(c, sd.stack, impl::nodeset_eval_first); - - if (sd.oom) - { - #ifdef PUGIXML_NO_EXCEPTIONS - return xpath_node(); - #else - throw std::bad_alloc(); - #endif - } - - return r.first(); - } - - PUGI__FN const xpath_parse_result& xpath_query::result() const - { - return _result; - } - - PUGI__FN static void unspecified_bool_xpath_query(xpath_query***) - { - } - - PUGI__FN xpath_query::operator xpath_query::unspecified_bool_type() const - { - return _impl ? unspecified_bool_xpath_query : 0; - } - - PUGI__FN bool xpath_query::operator!() const - { - return !_impl; - } - - PUGI__FN xpath_node xml_node::select_node(const char_t* query, xpath_variable_set* variables) const - { - xpath_query q(query, variables); - return q.evaluate_node(*this); - } - - PUGI__FN xpath_node xml_node::select_node(const xpath_query& query) const - { - return query.evaluate_node(*this); - } - - PUGI__FN xpath_node_set xml_node::select_nodes(const char_t* query, xpath_variable_set* variables) const - { - xpath_query q(query, variables); - return q.evaluate_node_set(*this); - } - - PUGI__FN xpath_node_set xml_node::select_nodes(const xpath_query& query) const - { - return query.evaluate_node_set(*this); - } - - PUGI__FN xpath_node xml_node::select_single_node(const char_t* query, xpath_variable_set* variables) const - { - xpath_query q(query, variables); - return q.evaluate_node(*this); - } - - PUGI__FN xpath_node xml_node::select_single_node(const xpath_query& query) const - { - return query.evaluate_node(*this); - } -} - -#endif - -#ifdef __BORLANDC__ -# pragma option pop -#endif - -// Intel C++ does not properly keep warning state for function templates, -// so popping warning state at the end of translation unit leads to warnings in the middle. -#if defined(_MSC_VER) && !defined(__INTEL_COMPILER) -# pragma warning(pop) -#endif - -#if defined(_MSC_VER) && defined(__c2__) -# pragma clang diagnostic pop -#endif - -// Undefine all local macros (makes sure we're not leaking macros in header-only mode) -#undef PUGI__NO_INLINE -#undef PUGI__UNLIKELY -#undef PUGI__STATIC_ASSERT -#undef PUGI__DMC_VOLATILE -#undef PUGI__UNSIGNED_OVERFLOW -#undef PUGI__MSVC_CRT_VERSION -#undef PUGI__SNPRINTF -#undef PUGI__NS_BEGIN -#undef PUGI__NS_END -#undef PUGI__FN -#undef PUGI__FN_NO_INLINE -#undef PUGI__GETHEADER_IMPL -#undef PUGI__GETPAGE_IMPL -#undef PUGI__GETPAGE -#undef PUGI__NODETYPE -#undef PUGI__IS_CHARTYPE_IMPL -#undef PUGI__IS_CHARTYPE -#undef PUGI__IS_CHARTYPEX -#undef PUGI__ENDSWITH -#undef PUGI__SKIPWS -#undef PUGI__OPTSET -#undef PUGI__PUSHNODE -#undef PUGI__POPNODE -#undef PUGI__SCANFOR -#undef PUGI__SCANWHILE -#undef PUGI__SCANWHILE_UNROLL -#undef PUGI__ENDSEG -#undef PUGI__THROW_ERROR -#undef PUGI__CHECK_ERROR - -#endif - -/** - * Copyright (c) 2006-2020 Arseny Kapoulkine - * - * Permission is hereby granted, free of charge, to any person - * obtaining a copy of this software and associated documentation - * files (the "Software"), to deal in the Software without - * restriction, including without limitation the rights to use, - * copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following - * conditions: - * - * The above copyright notice and this permission notice shall be - * included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES - * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT - * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, - * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR - * OTHER DEALINGS IN THE SOFTWARE. - */ |