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authorsanine <sanine.not@pm.me>2022-01-01 13:24:33 -0600
committersanine <sanine.not@pm.me>2022-01-01 13:24:33 -0600
commit7b78b6986e714cbd7653b89287b928974eb5ee4f (patch)
treeb6334336f722e44bf3020e316976ed5ed3b85ba0 /src/markdown/md4c.c
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diff --git a/src/markdown/md4c.c b/src/markdown/md4c.c
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+/*
+ * MD4C: Markdown parser for C
+ * (http://github.com/mity/md4c)
+ *
+ * Copyright (c) 2016-2020 Martin Mitas
+ *
+ * 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.
+ */
+
+#include "md4c.h"
+
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+/*****************************
+ *** Miscellaneous Stuff ***
+ *****************************/
+
+#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199409L
+ /* C89/90 or old compilers in general may not understand "inline". */
+ #if defined __GNUC__
+ #define inline __inline__
+ #elif defined _MSC_VER
+ #define inline __inline
+ #else
+ #define inline
+ #endif
+#endif
+
+/* Make the UTF-8 support the default. */
+#if !defined MD4C_USE_ASCII && !defined MD4C_USE_UTF8 && !defined MD4C_USE_UTF16
+ #define MD4C_USE_UTF8
+#endif
+
+/* Magic for making wide literals with MD4C_USE_UTF16. */
+#ifdef _T
+ #undef _T
+#endif
+#if defined MD4C_USE_UTF16
+ #define _T(x) L##x
+#else
+ #define _T(x) x
+#endif
+
+/* Misc. macros. */
+#define SIZEOF_ARRAY(a) (sizeof(a) / sizeof(a[0]))
+
+#define STRINGIZE_(x) #x
+#define STRINGIZE(x) STRINGIZE_(x)
+
+#ifndef TRUE
+ #define TRUE 1
+ #define FALSE 0
+#endif
+
+#define MD_LOG(msg) \
+ do { \
+ if(ctx->parser.debug_log != NULL) \
+ ctx->parser.debug_log((msg), ctx->userdata); \
+ } while(0)
+
+#ifdef DEBUG
+ #define MD_ASSERT(cond) \
+ do { \
+ if(!(cond)) { \
+ MD_LOG(__FILE__ ":" STRINGIZE(__LINE__) ": " \
+ "Assertion '" STRINGIZE(cond) "' failed."); \
+ exit(1); \
+ } \
+ } while(0)
+
+ #define MD_UNREACHABLE() MD_ASSERT(1 == 0)
+#else
+ #ifdef __GNUC__
+ #define MD_ASSERT(cond) do { if(!(cond)) __builtin_unreachable(); } while(0)
+ #define MD_UNREACHABLE() do { __builtin_unreachable(); } while(0)
+ #elif defined _MSC_VER && _MSC_VER > 120
+ #define MD_ASSERT(cond) do { __assume(cond); } while(0)
+ #define MD_UNREACHABLE() do { __assume(0); } while(0)
+ #else
+ #define MD_ASSERT(cond) do {} while(0)
+ #define MD_UNREACHABLE() do {} while(0)
+ #endif
+#endif
+
+/* For falling through case labels in switch statements. */
+#if defined __clang__ && __clang_major__ >= 12
+ #define MD_FALLTHROUGH() __attribute__((fallthrough))
+#elif defined __GNUC__ && __GNUC__ >= 7
+ #define MD_FALLTHROUGH() __attribute__((fallthrough))
+#else
+ #define MD_FALLTHROUGH() ((void)0)
+#endif
+
+/* Suppress "unused parameter" warnings. */
+#define MD_UNUSED(x) ((void)x)
+
+
+/************************
+ *** Internal Types ***
+ ************************/
+
+/* These are omnipresent so lets save some typing. */
+#define CHAR MD_CHAR
+#define SZ MD_SIZE
+#define OFF MD_OFFSET
+
+typedef struct MD_MARK_tag MD_MARK;
+typedef struct MD_BLOCK_tag MD_BLOCK;
+typedef struct MD_CONTAINER_tag MD_CONTAINER;
+typedef struct MD_REF_DEF_tag MD_REF_DEF;
+
+
+/* During analyzes of inline marks, we need to manage some "mark chains",
+ * of (yet unresolved) openers. This structure holds start/end of the chain.
+ * The chain internals are then realized through MD_MARK::prev and ::next.
+ */
+typedef struct MD_MARKCHAIN_tag MD_MARKCHAIN;
+struct MD_MARKCHAIN_tag {
+ int head; /* Index of first mark in the chain, or -1 if empty. */
+ int tail; /* Index of last mark in the chain, or -1 if empty. */
+};
+
+/* Context propagated through all the parsing. */
+typedef struct MD_CTX_tag MD_CTX;
+struct MD_CTX_tag {
+ /* Immutable stuff (parameters of md_parse()). */
+ const CHAR* text;
+ SZ size;
+ MD_PARSER parser;
+ void* userdata;
+
+ /* When this is true, it allows some optimizations. */
+ int doc_ends_with_newline;
+
+ /* Helper temporary growing buffer. */
+ CHAR* buffer;
+ unsigned alloc_buffer;
+
+ /* Reference definitions. */
+ MD_REF_DEF* ref_defs;
+ int n_ref_defs;
+ int alloc_ref_defs;
+ void** ref_def_hashtable;
+ int ref_def_hashtable_size;
+
+ /* Stack of inline/span markers.
+ * This is only used for parsing a single block contents but by storing it
+ * here we may reuse the stack for subsequent blocks; i.e. we have fewer
+ * (re)allocations. */
+ MD_MARK* marks;
+ int n_marks;
+ int alloc_marks;
+
+#if defined MD4C_USE_UTF16
+ char mark_char_map[128];
+#else
+ char mark_char_map[256];
+#endif
+
+ /* For resolving of inline spans. */
+ MD_MARKCHAIN mark_chains[13];
+#define PTR_CHAIN (ctx->mark_chains[0])
+#define TABLECELLBOUNDARIES (ctx->mark_chains[1])
+#define ASTERISK_OPENERS_extraword_mod3_0 (ctx->mark_chains[2])
+#define ASTERISK_OPENERS_extraword_mod3_1 (ctx->mark_chains[3])
+#define ASTERISK_OPENERS_extraword_mod3_2 (ctx->mark_chains[4])
+#define ASTERISK_OPENERS_intraword_mod3_0 (ctx->mark_chains[5])
+#define ASTERISK_OPENERS_intraword_mod3_1 (ctx->mark_chains[6])
+#define ASTERISK_OPENERS_intraword_mod3_2 (ctx->mark_chains[7])
+#define UNDERSCORE_OPENERS (ctx->mark_chains[8])
+#define TILDE_OPENERS_1 (ctx->mark_chains[9])
+#define TILDE_OPENERS_2 (ctx->mark_chains[10])
+#define BRACKET_OPENERS (ctx->mark_chains[11])
+#define DOLLAR_OPENERS (ctx->mark_chains[12])
+#define OPENERS_CHAIN_FIRST 2
+#define OPENERS_CHAIN_LAST 12
+
+ int n_table_cell_boundaries;
+
+ /* For resolving links. */
+ int unresolved_link_head;
+ int unresolved_link_tail;
+
+ /* For resolving raw HTML. */
+ OFF html_comment_horizon;
+ OFF html_proc_instr_horizon;
+ OFF html_decl_horizon;
+ OFF html_cdata_horizon;
+
+ /* For block analysis.
+ * Notes:
+ * -- It holds MD_BLOCK as well as MD_LINE structures. After each
+ * MD_BLOCK, its (multiple) MD_LINE(s) follow.
+ * -- For MD_BLOCK_HTML and MD_BLOCK_CODE, MD_VERBATIMLINE(s) are used
+ * instead of MD_LINE(s).
+ */
+ void* block_bytes;
+ MD_BLOCK* current_block;
+ int n_block_bytes;
+ int alloc_block_bytes;
+
+ /* For container block analysis. */
+ MD_CONTAINER* containers;
+ int n_containers;
+ int alloc_containers;
+
+ /* Minimal indentation to call the block "indented code block". */
+ unsigned code_indent_offset;
+
+ /* Contextual info for line analysis. */
+ SZ code_fence_length; /* For checking closing fence length. */
+ int html_block_type; /* For checking closing raw HTML condition. */
+ int last_line_has_list_loosening_effect;
+ int last_list_item_starts_with_two_blank_lines;
+};
+
+enum MD_LINETYPE_tag {
+ MD_LINE_BLANK,
+ MD_LINE_HR,
+ MD_LINE_ATXHEADER,
+ MD_LINE_SETEXTHEADER,
+ MD_LINE_SETEXTUNDERLINE,
+ MD_LINE_INDENTEDCODE,
+ MD_LINE_FENCEDCODE,
+ MD_LINE_HTML,
+ MD_LINE_TEXT,
+ MD_LINE_TABLE,
+ MD_LINE_TABLEUNDERLINE
+};
+typedef enum MD_LINETYPE_tag MD_LINETYPE;
+
+typedef struct MD_LINE_ANALYSIS_tag MD_LINE_ANALYSIS;
+struct MD_LINE_ANALYSIS_tag {
+ MD_LINETYPE type : 16;
+ unsigned data : 16;
+ OFF beg;
+ OFF end;
+ unsigned indent; /* Indentation level. */
+};
+
+typedef struct MD_LINE_tag MD_LINE;
+struct MD_LINE_tag {
+ OFF beg;
+ OFF end;
+};
+
+typedef struct MD_VERBATIMLINE_tag MD_VERBATIMLINE;
+struct MD_VERBATIMLINE_tag {
+ OFF beg;
+ OFF end;
+ OFF indent;
+};
+
+
+/*****************
+ *** Helpers ***
+ *****************/
+
+/* Character accessors. */
+#define CH(off) (ctx->text[(off)])
+#define STR(off) (ctx->text + (off))
+
+/* Character classification.
+ * Note we assume ASCII compatibility of code points < 128 here. */
+#define ISIN_(ch, ch_min, ch_max) ((ch_min) <= (unsigned)(ch) && (unsigned)(ch) <= (ch_max))
+#define ISANYOF_(ch, palette) ((ch) != _T('\0') && md_strchr((palette), (ch)) != NULL)
+#define ISANYOF2_(ch, ch1, ch2) ((ch) == (ch1) || (ch) == (ch2))
+#define ISANYOF3_(ch, ch1, ch2, ch3) ((ch) == (ch1) || (ch) == (ch2) || (ch) == (ch3))
+#define ISASCII_(ch) ((unsigned)(ch) <= 127)
+#define ISBLANK_(ch) (ISANYOF2_((ch), _T(' '), _T('\t')))
+#define ISNEWLINE_(ch) (ISANYOF2_((ch), _T('\r'), _T('\n')))
+#define ISWHITESPACE_(ch) (ISBLANK_(ch) || ISANYOF2_((ch), _T('\v'), _T('\f')))
+#define ISCNTRL_(ch) ((unsigned)(ch) <= 31 || (unsigned)(ch) == 127)
+#define ISPUNCT_(ch) (ISIN_(ch, 33, 47) || ISIN_(ch, 58, 64) || ISIN_(ch, 91, 96) || ISIN_(ch, 123, 126))
+#define ISUPPER_(ch) (ISIN_(ch, _T('A'), _T('Z')))
+#define ISLOWER_(ch) (ISIN_(ch, _T('a'), _T('z')))
+#define ISALPHA_(ch) (ISUPPER_(ch) || ISLOWER_(ch))
+#define ISDIGIT_(ch) (ISIN_(ch, _T('0'), _T('9')))
+#define ISXDIGIT_(ch) (ISDIGIT_(ch) || ISIN_(ch, _T('A'), _T('F')) || ISIN_(ch, _T('a'), _T('f')))
+#define ISALNUM_(ch) (ISALPHA_(ch) || ISDIGIT_(ch))
+
+#define ISANYOF(off, palette) ISANYOF_(CH(off), (palette))
+#define ISANYOF2(off, ch1, ch2) ISANYOF2_(CH(off), (ch1), (ch2))
+#define ISANYOF3(off, ch1, ch2, ch3) ISANYOF3_(CH(off), (ch1), (ch2), (ch3))
+#define ISASCII(off) ISASCII_(CH(off))
+#define ISBLANK(off) ISBLANK_(CH(off))
+#define ISNEWLINE(off) ISNEWLINE_(CH(off))
+#define ISWHITESPACE(off) ISWHITESPACE_(CH(off))
+#define ISCNTRL(off) ISCNTRL_(CH(off))
+#define ISPUNCT(off) ISPUNCT_(CH(off))
+#define ISUPPER(off) ISUPPER_(CH(off))
+#define ISLOWER(off) ISLOWER_(CH(off))
+#define ISALPHA(off) ISALPHA_(CH(off))
+#define ISDIGIT(off) ISDIGIT_(CH(off))
+#define ISXDIGIT(off) ISXDIGIT_(CH(off))
+#define ISALNUM(off) ISALNUM_(CH(off))
+
+
+#if defined MD4C_USE_UTF16
+ #define md_strchr wcschr
+#else
+ #define md_strchr strchr
+#endif
+
+
+/* Case insensitive check of string equality. */
+static inline int
+md_ascii_case_eq(const CHAR* s1, const CHAR* s2, SZ n)
+{
+ OFF i;
+ for(i = 0; i < n; i++) {
+ CHAR ch1 = s1[i];
+ CHAR ch2 = s2[i];
+
+ if(ISLOWER_(ch1))
+ ch1 += ('A'-'a');
+ if(ISLOWER_(ch2))
+ ch2 += ('A'-'a');
+ if(ch1 != ch2)
+ return FALSE;
+ }
+ return TRUE;
+}
+
+static inline int
+md_ascii_eq(const CHAR* s1, const CHAR* s2, SZ n)
+{
+ return memcmp(s1, s2, n * sizeof(CHAR)) == 0;
+}
+
+static int
+md_text_with_null_replacement(MD_CTX* ctx, MD_TEXTTYPE type, const CHAR* str, SZ size)
+{
+ OFF off = 0;
+ int ret = 0;
+
+ while(1) {
+ while(off < size && str[off] != _T('\0'))
+ off++;
+
+ if(off > 0) {
+ ret = ctx->parser.text(type, str, off, ctx->userdata);
+ if(ret != 0)
+ return ret;
+
+ str += off;
+ size -= off;
+ off = 0;
+ }
+
+ if(off >= size)
+ return 0;
+
+ ret = ctx->parser.text(MD_TEXT_NULLCHAR, _T(""), 1, ctx->userdata);
+ if(ret != 0)
+ return ret;
+ off++;
+ }
+}
+
+
+#define MD_CHECK(func) \
+ do { \
+ ret = (func); \
+ if(ret < 0) \
+ goto abort; \
+ } while(0)
+
+
+#define MD_TEMP_BUFFER(sz) \
+ do { \
+ if(sz > ctx->alloc_buffer) { \
+ CHAR* new_buffer; \
+ SZ new_size = ((sz) + (sz) / 2 + 128) & ~127; \
+ \
+ new_buffer = realloc(ctx->buffer, new_size); \
+ if(new_buffer == NULL) { \
+ MD_LOG("realloc() failed."); \
+ ret = -1; \
+ goto abort; \
+ } \
+ \
+ ctx->buffer = new_buffer; \
+ ctx->alloc_buffer = new_size; \
+ } \
+ } while(0)
+
+
+#define MD_ENTER_BLOCK(type, arg) \
+ do { \
+ ret = ctx->parser.enter_block((type), (arg), ctx->userdata); \
+ if(ret != 0) { \
+ MD_LOG("Aborted from enter_block() callback."); \
+ goto abort; \
+ } \
+ } while(0)
+
+#define MD_LEAVE_BLOCK(type, arg) \
+ do { \
+ ret = ctx->parser.leave_block((type), (arg), ctx->userdata); \
+ if(ret != 0) { \
+ MD_LOG("Aborted from leave_block() callback."); \
+ goto abort; \
+ } \
+ } while(0)
+
+#define MD_ENTER_SPAN(type, arg) \
+ do { \
+ ret = ctx->parser.enter_span((type), (arg), ctx->userdata); \
+ if(ret != 0) { \
+ MD_LOG("Aborted from enter_span() callback."); \
+ goto abort; \
+ } \
+ } while(0)
+
+#define MD_LEAVE_SPAN(type, arg) \
+ do { \
+ ret = ctx->parser.leave_span((type), (arg), ctx->userdata); \
+ if(ret != 0) { \
+ MD_LOG("Aborted from leave_span() callback."); \
+ goto abort; \
+ } \
+ } while(0)
+
+#define MD_TEXT(type, str, size) \
+ do { \
+ if(size > 0) { \
+ ret = ctx->parser.text((type), (str), (size), ctx->userdata); \
+ if(ret != 0) { \
+ MD_LOG("Aborted from text() callback."); \
+ goto abort; \
+ } \
+ } \
+ } while(0)
+
+#define MD_TEXT_INSECURE(type, str, size) \
+ do { \
+ if(size > 0) { \
+ ret = md_text_with_null_replacement(ctx, type, str, size); \
+ if(ret != 0) { \
+ MD_LOG("Aborted from text() callback."); \
+ goto abort; \
+ } \
+ } \
+ } while(0)
+
+
+
+/*************************
+ *** Unicode Support ***
+ *************************/
+
+typedef struct MD_UNICODE_FOLD_INFO_tag MD_UNICODE_FOLD_INFO;
+struct MD_UNICODE_FOLD_INFO_tag {
+ unsigned codepoints[3];
+ unsigned n_codepoints;
+};
+
+
+#if defined MD4C_USE_UTF16 || defined MD4C_USE_UTF8
+ /* Binary search over sorted "map" of codepoints. Consecutive sequences
+ * of codepoints may be encoded in the map by just using the
+ * (MIN_CODEPOINT | 0x40000000) and (MAX_CODEPOINT | 0x80000000).
+ *
+ * Returns index of the found record in the map (in the case of ranges,
+ * the minimal value is used); or -1 on failure. */
+ static int
+ md_unicode_bsearch__(unsigned codepoint, const unsigned* map, size_t map_size)
+ {
+ int beg, end;
+ int pivot_beg, pivot_end;
+
+ beg = 0;
+ end = (int) map_size-1;
+ while(beg <= end) {
+ /* Pivot may be a range, not just a single value. */
+ pivot_beg = pivot_end = (beg + end) / 2;
+ if(map[pivot_end] & 0x40000000)
+ pivot_end++;
+ if(map[pivot_beg] & 0x80000000)
+ pivot_beg--;
+
+ if(codepoint < (map[pivot_beg] & 0x00ffffff))
+ end = pivot_beg - 1;
+ else if(codepoint > (map[pivot_end] & 0x00ffffff))
+ beg = pivot_end + 1;
+ else
+ return pivot_beg;
+ }
+
+ return -1;
+ }
+
+ static int
+ md_is_unicode_whitespace__(unsigned codepoint)
+ {
+#define R(cp_min, cp_max) ((cp_min) | 0x40000000), ((cp_max) | 0x80000000)
+#define S(cp) (cp)
+ /* Unicode "Zs" category.
+ * (generated by scripts/build_whitespace_map.py) */
+ static const unsigned WHITESPACE_MAP[] = {
+ S(0x0020), S(0x00a0), S(0x1680), R(0x2000,0x200a), S(0x202f), S(0x205f), S(0x3000)
+ };
+#undef R
+#undef S
+
+ /* The ASCII ones are the most frequently used ones, also CommonMark
+ * specification requests few more in this range. */
+ if(codepoint <= 0x7f)
+ return ISWHITESPACE_(codepoint);
+
+ return (md_unicode_bsearch__(codepoint, WHITESPACE_MAP, SIZEOF_ARRAY(WHITESPACE_MAP)) >= 0);
+ }
+
+ static int
+ md_is_unicode_punct__(unsigned codepoint)
+ {
+#define R(cp_min, cp_max) ((cp_min) | 0x40000000), ((cp_max) | 0x80000000)
+#define S(cp) (cp)
+ /* Unicode "Pc", "Pd", "Pe", "Pf", "Pi", "Po", "Ps" categories.
+ * (generated by scripts/build_punct_map.py) */
+ static const unsigned PUNCT_MAP[] = {
+ R(0x0021,0x0023), R(0x0025,0x002a), R(0x002c,0x002f), R(0x003a,0x003b), R(0x003f,0x0040),
+ R(0x005b,0x005d), S(0x005f), S(0x007b), S(0x007d), S(0x00a1), S(0x00a7), S(0x00ab), R(0x00b6,0x00b7),
+ S(0x00bb), S(0x00bf), S(0x037e), S(0x0387), R(0x055a,0x055f), R(0x0589,0x058a), S(0x05be), S(0x05c0),
+ S(0x05c3), S(0x05c6), R(0x05f3,0x05f4), R(0x0609,0x060a), R(0x060c,0x060d), S(0x061b), R(0x061e,0x061f),
+ R(0x066a,0x066d), S(0x06d4), R(0x0700,0x070d), R(0x07f7,0x07f9), R(0x0830,0x083e), S(0x085e),
+ R(0x0964,0x0965), S(0x0970), S(0x09fd), S(0x0a76), S(0x0af0), S(0x0c77), S(0x0c84), S(0x0df4), S(0x0e4f),
+ R(0x0e5a,0x0e5b), R(0x0f04,0x0f12), S(0x0f14), R(0x0f3a,0x0f3d), S(0x0f85), R(0x0fd0,0x0fd4),
+ R(0x0fd9,0x0fda), R(0x104a,0x104f), S(0x10fb), R(0x1360,0x1368), S(0x1400), S(0x166e), R(0x169b,0x169c),
+ R(0x16eb,0x16ed), R(0x1735,0x1736), R(0x17d4,0x17d6), R(0x17d8,0x17da), R(0x1800,0x180a),
+ R(0x1944,0x1945), R(0x1a1e,0x1a1f), R(0x1aa0,0x1aa6), R(0x1aa8,0x1aad), R(0x1b5a,0x1b60),
+ R(0x1bfc,0x1bff), R(0x1c3b,0x1c3f), R(0x1c7e,0x1c7f), R(0x1cc0,0x1cc7), S(0x1cd3), R(0x2010,0x2027),
+ R(0x2030,0x2043), R(0x2045,0x2051), R(0x2053,0x205e), R(0x207d,0x207e), R(0x208d,0x208e),
+ R(0x2308,0x230b), R(0x2329,0x232a), R(0x2768,0x2775), R(0x27c5,0x27c6), R(0x27e6,0x27ef),
+ R(0x2983,0x2998), R(0x29d8,0x29db), R(0x29fc,0x29fd), R(0x2cf9,0x2cfc), R(0x2cfe,0x2cff), S(0x2d70),
+ R(0x2e00,0x2e2e), R(0x2e30,0x2e4f), S(0x2e52), R(0x3001,0x3003), R(0x3008,0x3011), R(0x3014,0x301f),
+ S(0x3030), S(0x303d), S(0x30a0), S(0x30fb), R(0xa4fe,0xa4ff), R(0xa60d,0xa60f), S(0xa673), S(0xa67e),
+ R(0xa6f2,0xa6f7), R(0xa874,0xa877), R(0xa8ce,0xa8cf), R(0xa8f8,0xa8fa), S(0xa8fc), R(0xa92e,0xa92f),
+ S(0xa95f), R(0xa9c1,0xa9cd), R(0xa9de,0xa9df), R(0xaa5c,0xaa5f), R(0xaade,0xaadf), R(0xaaf0,0xaaf1),
+ S(0xabeb), R(0xfd3e,0xfd3f), R(0xfe10,0xfe19), R(0xfe30,0xfe52), R(0xfe54,0xfe61), S(0xfe63), S(0xfe68),
+ R(0xfe6a,0xfe6b), R(0xff01,0xff03), R(0xff05,0xff0a), R(0xff0c,0xff0f), R(0xff1a,0xff1b),
+ R(0xff1f,0xff20), R(0xff3b,0xff3d), S(0xff3f), S(0xff5b), S(0xff5d), R(0xff5f,0xff65), R(0x10100,0x10102),
+ S(0x1039f), S(0x103d0), S(0x1056f), S(0x10857), S(0x1091f), S(0x1093f), R(0x10a50,0x10a58), S(0x10a7f),
+ R(0x10af0,0x10af6), R(0x10b39,0x10b3f), R(0x10b99,0x10b9c), S(0x10ead), R(0x10f55,0x10f59),
+ R(0x11047,0x1104d), R(0x110bb,0x110bc), R(0x110be,0x110c1), R(0x11140,0x11143), R(0x11174,0x11175),
+ R(0x111c5,0x111c8), S(0x111cd), S(0x111db), R(0x111dd,0x111df), R(0x11238,0x1123d), S(0x112a9),
+ R(0x1144b,0x1144f), R(0x1145a,0x1145b), S(0x1145d), S(0x114c6), R(0x115c1,0x115d7), R(0x11641,0x11643),
+ R(0x11660,0x1166c), R(0x1173c,0x1173e), S(0x1183b), R(0x11944,0x11946), S(0x119e2), R(0x11a3f,0x11a46),
+ R(0x11a9a,0x11a9c), R(0x11a9e,0x11aa2), R(0x11c41,0x11c45), R(0x11c70,0x11c71), R(0x11ef7,0x11ef8),
+ S(0x11fff), R(0x12470,0x12474), R(0x16a6e,0x16a6f), S(0x16af5), R(0x16b37,0x16b3b), S(0x16b44),
+ R(0x16e97,0x16e9a), S(0x16fe2), S(0x1bc9f), R(0x1da87,0x1da8b), R(0x1e95e,0x1e95f)
+ };
+#undef R
+#undef S
+
+ /* The ASCII ones are the most frequently used ones, also CommonMark
+ * specification requests few more in this range. */
+ if(codepoint <= 0x7f)
+ return ISPUNCT_(codepoint);
+
+ return (md_unicode_bsearch__(codepoint, PUNCT_MAP, SIZEOF_ARRAY(PUNCT_MAP)) >= 0);
+ }
+
+ static void
+ md_get_unicode_fold_info(unsigned codepoint, MD_UNICODE_FOLD_INFO* info)
+ {
+#define R(cp_min, cp_max) ((cp_min) | 0x40000000), ((cp_max) | 0x80000000)
+#define S(cp) (cp)
+ /* Unicode "Pc", "Pd", "Pe", "Pf", "Pi", "Po", "Ps" categories.
+ * (generated by scripts/build_folding_map.py) */
+ static const unsigned FOLD_MAP_1[] = {
+ R(0x0041,0x005a), S(0x00b5), R(0x00c0,0x00d6), R(0x00d8,0x00de), R(0x0100,0x012e), R(0x0132,0x0136),
+ R(0x0139,0x0147), R(0x014a,0x0176), S(0x0178), R(0x0179,0x017d), S(0x017f), S(0x0181), S(0x0182),
+ S(0x0184), S(0x0186), S(0x0187), S(0x0189), S(0x018a), S(0x018b), S(0x018e), S(0x018f), S(0x0190),
+ S(0x0191), S(0x0193), S(0x0194), S(0x0196), S(0x0197), S(0x0198), S(0x019c), S(0x019d), S(0x019f),
+ R(0x01a0,0x01a4), S(0x01a6), S(0x01a7), S(0x01a9), S(0x01ac), S(0x01ae), S(0x01af), S(0x01b1), S(0x01b2),
+ S(0x01b3), S(0x01b5), S(0x01b7), S(0x01b8), S(0x01bc), S(0x01c4), S(0x01c5), S(0x01c7), S(0x01c8),
+ S(0x01ca), R(0x01cb,0x01db), R(0x01de,0x01ee), S(0x01f1), S(0x01f2), S(0x01f4), S(0x01f6), S(0x01f7),
+ R(0x01f8,0x021e), S(0x0220), R(0x0222,0x0232), S(0x023a), S(0x023b), S(0x023d), S(0x023e), S(0x0241),
+ S(0x0243), S(0x0244), S(0x0245), R(0x0246,0x024e), S(0x0345), S(0x0370), S(0x0372), S(0x0376), S(0x037f),
+ S(0x0386), R(0x0388,0x038a), S(0x038c), S(0x038e), S(0x038f), R(0x0391,0x03a1), R(0x03a3,0x03ab),
+ S(0x03c2), S(0x03cf), S(0x03d0), S(0x03d1), S(0x03d5), S(0x03d6), R(0x03d8,0x03ee), S(0x03f0), S(0x03f1),
+ S(0x03f4), S(0x03f5), S(0x03f7), S(0x03f9), S(0x03fa), R(0x03fd,0x03ff), R(0x0400,0x040f),
+ R(0x0410,0x042f), R(0x0460,0x0480), R(0x048a,0x04be), S(0x04c0), R(0x04c1,0x04cd), R(0x04d0,0x052e),
+ R(0x0531,0x0556), R(0x10a0,0x10c5), S(0x10c7), S(0x10cd), R(0x13f8,0x13fd), S(0x1c80), S(0x1c81),
+ S(0x1c82), S(0x1c83), S(0x1c84), S(0x1c85), S(0x1c86), S(0x1c87), S(0x1c88), R(0x1c90,0x1cba),
+ R(0x1cbd,0x1cbf), R(0x1e00,0x1e94), S(0x1e9b), R(0x1ea0,0x1efe), R(0x1f08,0x1f0f), R(0x1f18,0x1f1d),
+ R(0x1f28,0x1f2f), R(0x1f38,0x1f3f), R(0x1f48,0x1f4d), S(0x1f59), S(0x1f5b), S(0x1f5d), S(0x1f5f),
+ R(0x1f68,0x1f6f), S(0x1fb8), S(0x1fb9), S(0x1fba), S(0x1fbb), S(0x1fbe), R(0x1fc8,0x1fcb), S(0x1fd8),
+ S(0x1fd9), S(0x1fda), S(0x1fdb), S(0x1fe8), S(0x1fe9), S(0x1fea), S(0x1feb), S(0x1fec), S(0x1ff8),
+ S(0x1ff9), S(0x1ffa), S(0x1ffb), S(0x2126), S(0x212a), S(0x212b), S(0x2132), R(0x2160,0x216f), S(0x2183),
+ R(0x24b6,0x24cf), R(0x2c00,0x2c2e), S(0x2c60), S(0x2c62), S(0x2c63), S(0x2c64), R(0x2c67,0x2c6b),
+ S(0x2c6d), S(0x2c6e), S(0x2c6f), S(0x2c70), S(0x2c72), S(0x2c75), S(0x2c7e), S(0x2c7f), R(0x2c80,0x2ce2),
+ S(0x2ceb), S(0x2ced), S(0x2cf2), R(0xa640,0xa66c), R(0xa680,0xa69a), R(0xa722,0xa72e), R(0xa732,0xa76e),
+ S(0xa779), S(0xa77b), S(0xa77d), R(0xa77e,0xa786), S(0xa78b), S(0xa78d), S(0xa790), S(0xa792),
+ R(0xa796,0xa7a8), S(0xa7aa), S(0xa7ab), S(0xa7ac), S(0xa7ad), S(0xa7ae), S(0xa7b0), S(0xa7b1), S(0xa7b2),
+ S(0xa7b3), R(0xa7b4,0xa7be), S(0xa7c2), S(0xa7c4), S(0xa7c5), S(0xa7c6), S(0xa7c7), S(0xa7c9), S(0xa7f5),
+ R(0xab70,0xabbf), R(0xff21,0xff3a), R(0x10400,0x10427), R(0x104b0,0x104d3), R(0x10c80,0x10cb2),
+ R(0x118a0,0x118bf), R(0x16e40,0x16e5f), R(0x1e900,0x1e921)
+ };
+ static const unsigned FOLD_MAP_1_DATA[] = {
+ 0x0061, 0x007a, 0x03bc, 0x00e0, 0x00f6, 0x00f8, 0x00fe, 0x0101, 0x012f, 0x0133, 0x0137, 0x013a, 0x0148,
+ 0x014b, 0x0177, 0x00ff, 0x017a, 0x017e, 0x0073, 0x0253, 0x0183, 0x0185, 0x0254, 0x0188, 0x0256, 0x0257,
+ 0x018c, 0x01dd, 0x0259, 0x025b, 0x0192, 0x0260, 0x0263, 0x0269, 0x0268, 0x0199, 0x026f, 0x0272, 0x0275,
+ 0x01a1, 0x01a5, 0x0280, 0x01a8, 0x0283, 0x01ad, 0x0288, 0x01b0, 0x028a, 0x028b, 0x01b4, 0x01b6, 0x0292,
+ 0x01b9, 0x01bd, 0x01c6, 0x01c6, 0x01c9, 0x01c9, 0x01cc, 0x01cc, 0x01dc, 0x01df, 0x01ef, 0x01f3, 0x01f3,
+ 0x01f5, 0x0195, 0x01bf, 0x01f9, 0x021f, 0x019e, 0x0223, 0x0233, 0x2c65, 0x023c, 0x019a, 0x2c66, 0x0242,
+ 0x0180, 0x0289, 0x028c, 0x0247, 0x024f, 0x03b9, 0x0371, 0x0373, 0x0377, 0x03f3, 0x03ac, 0x03ad, 0x03af,
+ 0x03cc, 0x03cd, 0x03ce, 0x03b1, 0x03c1, 0x03c3, 0x03cb, 0x03c3, 0x03d7, 0x03b2, 0x03b8, 0x03c6, 0x03c0,
+ 0x03d9, 0x03ef, 0x03ba, 0x03c1, 0x03b8, 0x03b5, 0x03f8, 0x03f2, 0x03fb, 0x037b, 0x037d, 0x0450, 0x045f,
+ 0x0430, 0x044f, 0x0461, 0x0481, 0x048b, 0x04bf, 0x04cf, 0x04c2, 0x04ce, 0x04d1, 0x052f, 0x0561, 0x0586,
+ 0x2d00, 0x2d25, 0x2d27, 0x2d2d, 0x13f0, 0x13f5, 0x0432, 0x0434, 0x043e, 0x0441, 0x0442, 0x0442, 0x044a,
+ 0x0463, 0xa64b, 0x10d0, 0x10fa, 0x10fd, 0x10ff, 0x1e01, 0x1e95, 0x1e61, 0x1ea1, 0x1eff, 0x1f00, 0x1f07,
+ 0x1f10, 0x1f15, 0x1f20, 0x1f27, 0x1f30, 0x1f37, 0x1f40, 0x1f45, 0x1f51, 0x1f53, 0x1f55, 0x1f57, 0x1f60,
+ 0x1f67, 0x1fb0, 0x1fb1, 0x1f70, 0x1f71, 0x03b9, 0x1f72, 0x1f75, 0x1fd0, 0x1fd1, 0x1f76, 0x1f77, 0x1fe0,
+ 0x1fe1, 0x1f7a, 0x1f7b, 0x1fe5, 0x1f78, 0x1f79, 0x1f7c, 0x1f7d, 0x03c9, 0x006b, 0x00e5, 0x214e, 0x2170,
+ 0x217f, 0x2184, 0x24d0, 0x24e9, 0x2c30, 0x2c5e, 0x2c61, 0x026b, 0x1d7d, 0x027d, 0x2c68, 0x2c6c, 0x0251,
+ 0x0271, 0x0250, 0x0252, 0x2c73, 0x2c76, 0x023f, 0x0240, 0x2c81, 0x2ce3, 0x2cec, 0x2cee, 0x2cf3, 0xa641,
+ 0xa66d, 0xa681, 0xa69b, 0xa723, 0xa72f, 0xa733, 0xa76f, 0xa77a, 0xa77c, 0x1d79, 0xa77f, 0xa787, 0xa78c,
+ 0x0265, 0xa791, 0xa793, 0xa797, 0xa7a9, 0x0266, 0x025c, 0x0261, 0x026c, 0x026a, 0x029e, 0x0287, 0x029d,
+ 0xab53, 0xa7b5, 0xa7bf, 0xa7c3, 0xa794, 0x0282, 0x1d8e, 0xa7c8, 0xa7ca, 0xa7f6, 0x13a0, 0x13ef, 0xff41,
+ 0xff5a, 0x10428, 0x1044f, 0x104d8, 0x104fb, 0x10cc0, 0x10cf2, 0x118c0, 0x118df, 0x16e60, 0x16e7f, 0x1e922,
+ 0x1e943
+ };
+ static const unsigned FOLD_MAP_2[] = {
+ S(0x00df), S(0x0130), S(0x0149), S(0x01f0), S(0x0587), S(0x1e96), S(0x1e97), S(0x1e98), S(0x1e99),
+ S(0x1e9a), S(0x1e9e), S(0x1f50), R(0x1f80,0x1f87), R(0x1f88,0x1f8f), R(0x1f90,0x1f97), R(0x1f98,0x1f9f),
+ R(0x1fa0,0x1fa7), R(0x1fa8,0x1faf), S(0x1fb2), S(0x1fb3), S(0x1fb4), S(0x1fb6), S(0x1fbc), S(0x1fc2),
+ S(0x1fc3), S(0x1fc4), S(0x1fc6), S(0x1fcc), S(0x1fd6), S(0x1fe4), S(0x1fe6), S(0x1ff2), S(0x1ff3),
+ S(0x1ff4), S(0x1ff6), S(0x1ffc), S(0xfb00), S(0xfb01), S(0xfb02), S(0xfb05), S(0xfb06), S(0xfb13),
+ S(0xfb14), S(0xfb15), S(0xfb16), S(0xfb17)
+ };
+ static const unsigned FOLD_MAP_2_DATA[] = {
+ 0x0073,0x0073, 0x0069,0x0307, 0x02bc,0x006e, 0x006a,0x030c, 0x0565,0x0582, 0x0068,0x0331, 0x0074,0x0308,
+ 0x0077,0x030a, 0x0079,0x030a, 0x0061,0x02be, 0x0073,0x0073, 0x03c5,0x0313, 0x1f00,0x03b9, 0x1f07,0x03b9,
+ 0x1f00,0x03b9, 0x1f07,0x03b9, 0x1f20,0x03b9, 0x1f27,0x03b9, 0x1f20,0x03b9, 0x1f27,0x03b9, 0x1f60,0x03b9,
+ 0x1f67,0x03b9, 0x1f60,0x03b9, 0x1f67,0x03b9, 0x1f70,0x03b9, 0x03b1,0x03b9, 0x03ac,0x03b9, 0x03b1,0x0342,
+ 0x03b1,0x03b9, 0x1f74,0x03b9, 0x03b7,0x03b9, 0x03ae,0x03b9, 0x03b7,0x0342, 0x03b7,0x03b9, 0x03b9,0x0342,
+ 0x03c1,0x0313, 0x03c5,0x0342, 0x1f7c,0x03b9, 0x03c9,0x03b9, 0x03ce,0x03b9, 0x03c9,0x0342, 0x03c9,0x03b9,
+ 0x0066,0x0066, 0x0066,0x0069, 0x0066,0x006c, 0x0073,0x0074, 0x0073,0x0074, 0x0574,0x0576, 0x0574,0x0565,
+ 0x0574,0x056b, 0x057e,0x0576, 0x0574,0x056d
+ };
+ static const unsigned FOLD_MAP_3[] = {
+ S(0x0390), S(0x03b0), S(0x1f52), S(0x1f54), S(0x1f56), S(0x1fb7), S(0x1fc7), S(0x1fd2), S(0x1fd3),
+ S(0x1fd7), S(0x1fe2), S(0x1fe3), S(0x1fe7), S(0x1ff7), S(0xfb03), S(0xfb04)
+ };
+ static const unsigned FOLD_MAP_3_DATA[] = {
+ 0x03b9,0x0308,0x0301, 0x03c5,0x0308,0x0301, 0x03c5,0x0313,0x0300, 0x03c5,0x0313,0x0301,
+ 0x03c5,0x0313,0x0342, 0x03b1,0x0342,0x03b9, 0x03b7,0x0342,0x03b9, 0x03b9,0x0308,0x0300,
+ 0x03b9,0x0308,0x0301, 0x03b9,0x0308,0x0342, 0x03c5,0x0308,0x0300, 0x03c5,0x0308,0x0301,
+ 0x03c5,0x0308,0x0342, 0x03c9,0x0342,0x03b9, 0x0066,0x0066,0x0069, 0x0066,0x0066,0x006c
+ };
+#undef R
+#undef S
+ static const struct {
+ const unsigned* map;
+ const unsigned* data;
+ size_t map_size;
+ unsigned n_codepoints;
+ } FOLD_MAP_LIST[] = {
+ { FOLD_MAP_1, FOLD_MAP_1_DATA, SIZEOF_ARRAY(FOLD_MAP_1), 1 },
+ { FOLD_MAP_2, FOLD_MAP_2_DATA, SIZEOF_ARRAY(FOLD_MAP_2), 2 },
+ { FOLD_MAP_3, FOLD_MAP_3_DATA, SIZEOF_ARRAY(FOLD_MAP_3), 3 }
+ };
+
+ int i;
+
+ /* Fast path for ASCII characters. */
+ if(codepoint <= 0x7f) {
+ info->codepoints[0] = codepoint;
+ if(ISUPPER_(codepoint))
+ info->codepoints[0] += 'a' - 'A';
+ info->n_codepoints = 1;
+ return;
+ }
+
+ /* Try to locate the codepoint in any of the maps. */
+ for(i = 0; i < (int) SIZEOF_ARRAY(FOLD_MAP_LIST); i++) {
+ int index;
+
+ index = md_unicode_bsearch__(codepoint, FOLD_MAP_LIST[i].map, FOLD_MAP_LIST[i].map_size);
+ if(index >= 0) {
+ /* Found the mapping. */
+ unsigned n_codepoints = FOLD_MAP_LIST[i].n_codepoints;
+ const unsigned* map = FOLD_MAP_LIST[i].map;
+ const unsigned* codepoints = FOLD_MAP_LIST[i].data + (index * n_codepoints);
+
+ memcpy(info->codepoints, codepoints, sizeof(unsigned) * n_codepoints);
+ info->n_codepoints = n_codepoints;
+
+ if(FOLD_MAP_LIST[i].map[index] != codepoint) {
+ /* The found mapping maps whole range of codepoints,
+ * i.e. we have to offset info->codepoints[0] accordingly. */
+ if((map[index] & 0x00ffffff)+1 == codepoints[0]) {
+ /* Alternating type of the range. */
+ info->codepoints[0] = codepoint + ((codepoint & 0x1) == (map[index] & 0x1) ? 1 : 0);
+ } else {
+ /* Range to range kind of mapping. */
+ info->codepoints[0] += (codepoint - (map[index] & 0x00ffffff));
+ }
+ }
+
+ return;
+ }
+ }
+
+ /* No mapping found. Map the codepoint to itself. */
+ info->codepoints[0] = codepoint;
+ info->n_codepoints = 1;
+ }
+#endif
+
+
+#if defined MD4C_USE_UTF16
+ #define IS_UTF16_SURROGATE_HI(word) (((WORD)(word) & 0xfc00) == 0xd800)
+ #define IS_UTF16_SURROGATE_LO(word) (((WORD)(word) & 0xfc00) == 0xdc00)
+ #define UTF16_DECODE_SURROGATE(hi, lo) (0x10000 + ((((unsigned)(hi) & 0x3ff) << 10) | (((unsigned)(lo) & 0x3ff) << 0)))
+
+ static unsigned
+ md_decode_utf16le__(const CHAR* str, SZ str_size, SZ* p_size)
+ {
+ if(IS_UTF16_SURROGATE_HI(str[0])) {
+ if(1 < str_size && IS_UTF16_SURROGATE_LO(str[1])) {
+ if(p_size != NULL)
+ *p_size = 2;
+ return UTF16_DECODE_SURROGATE(str[0], str[1]);
+ }
+ }
+
+ if(p_size != NULL)
+ *p_size = 1;
+ return str[0];
+ }
+
+ static unsigned
+ md_decode_utf16le_before__(MD_CTX* ctx, OFF off)
+ {
+ if(off > 2 && IS_UTF16_SURROGATE_HI(CH(off-2)) && IS_UTF16_SURROGATE_LO(CH(off-1)))
+ return UTF16_DECODE_SURROGATE(CH(off-2), CH(off-1));
+
+ return CH(off);
+ }
+
+ /* No whitespace uses surrogates, so no decoding needed here. */
+ #define ISUNICODEWHITESPACE_(codepoint) md_is_unicode_whitespace__(codepoint)
+ #define ISUNICODEWHITESPACE(off) md_is_unicode_whitespace__(CH(off))
+ #define ISUNICODEWHITESPACEBEFORE(off) md_is_unicode_whitespace__(CH((off)-1))
+
+ #define ISUNICODEPUNCT(off) md_is_unicode_punct__(md_decode_utf16le__(STR(off), ctx->size - (off), NULL))
+ #define ISUNICODEPUNCTBEFORE(off) md_is_unicode_punct__(md_decode_utf16le_before__(ctx, off))
+
+ static inline int
+ md_decode_unicode(const CHAR* str, OFF off, SZ str_size, SZ* p_char_size)
+ {
+ return md_decode_utf16le__(str+off, str_size-off, p_char_size);
+ }
+#elif defined MD4C_USE_UTF8
+ #define IS_UTF8_LEAD1(byte) ((unsigned char)(byte) <= 0x7f)
+ #define IS_UTF8_LEAD2(byte) (((unsigned char)(byte) & 0xe0) == 0xc0)
+ #define IS_UTF8_LEAD3(byte) (((unsigned char)(byte) & 0xf0) == 0xe0)
+ #define IS_UTF8_LEAD4(byte) (((unsigned char)(byte) & 0xf8) == 0xf0)
+ #define IS_UTF8_TAIL(byte) (((unsigned char)(byte) & 0xc0) == 0x80)
+
+ static unsigned
+ md_decode_utf8__(const CHAR* str, SZ str_size, SZ* p_size)
+ {
+ if(!IS_UTF8_LEAD1(str[0])) {
+ if(IS_UTF8_LEAD2(str[0])) {
+ if(1 < str_size && IS_UTF8_TAIL(str[1])) {
+ if(p_size != NULL)
+ *p_size = 2;
+
+ return (((unsigned int)str[0] & 0x1f) << 6) |
+ (((unsigned int)str[1] & 0x3f) << 0);
+ }
+ } else if(IS_UTF8_LEAD3(str[0])) {
+ if(2 < str_size && IS_UTF8_TAIL(str[1]) && IS_UTF8_TAIL(str[2])) {
+ if(p_size != NULL)
+ *p_size = 3;
+
+ return (((unsigned int)str[0] & 0x0f) << 12) |
+ (((unsigned int)str[1] & 0x3f) << 6) |
+ (((unsigned int)str[2] & 0x3f) << 0);
+ }
+ } else if(IS_UTF8_LEAD4(str[0])) {
+ if(3 < str_size && IS_UTF8_TAIL(str[1]) && IS_UTF8_TAIL(str[2]) && IS_UTF8_TAIL(str[3])) {
+ if(p_size != NULL)
+ *p_size = 4;
+
+ return (((unsigned int)str[0] & 0x07) << 18) |
+ (((unsigned int)str[1] & 0x3f) << 12) |
+ (((unsigned int)str[2] & 0x3f) << 6) |
+ (((unsigned int)str[3] & 0x3f) << 0);
+ }
+ }
+ }
+
+ if(p_size != NULL)
+ *p_size = 1;
+ return (unsigned) str[0];
+ }
+
+ static unsigned
+ md_decode_utf8_before__(MD_CTX* ctx, OFF off)
+ {
+ if(!IS_UTF8_LEAD1(CH(off-1))) {
+ if(off > 1 && IS_UTF8_LEAD2(CH(off-2)) && IS_UTF8_TAIL(CH(off-1)))
+ return (((unsigned int)CH(off-2) & 0x1f) << 6) |
+ (((unsigned int)CH(off-1) & 0x3f) << 0);
+
+ if(off > 2 && IS_UTF8_LEAD3(CH(off-3)) && IS_UTF8_TAIL(CH(off-2)) && IS_UTF8_TAIL(CH(off-1)))
+ return (((unsigned int)CH(off-3) & 0x0f) << 12) |
+ (((unsigned int)CH(off-2) & 0x3f) << 6) |
+ (((unsigned int)CH(off-1) & 0x3f) << 0);
+
+ if(off > 3 && IS_UTF8_LEAD4(CH(off-4)) && IS_UTF8_TAIL(CH(off-3)) && IS_UTF8_TAIL(CH(off-2)) && IS_UTF8_TAIL(CH(off-1)))
+ return (((unsigned int)CH(off-4) & 0x07) << 18) |
+ (((unsigned int)CH(off-3) & 0x3f) << 12) |
+ (((unsigned int)CH(off-2) & 0x3f) << 6) |
+ (((unsigned int)CH(off-1) & 0x3f) << 0);
+ }
+
+ return (unsigned) CH(off-1);
+ }
+
+ #define ISUNICODEWHITESPACE_(codepoint) md_is_unicode_whitespace__(codepoint)
+ #define ISUNICODEWHITESPACE(off) md_is_unicode_whitespace__(md_decode_utf8__(STR(off), ctx->size - (off), NULL))
+ #define ISUNICODEWHITESPACEBEFORE(off) md_is_unicode_whitespace__(md_decode_utf8_before__(ctx, off))
+
+ #define ISUNICODEPUNCT(off) md_is_unicode_punct__(md_decode_utf8__(STR(off), ctx->size - (off), NULL))
+ #define ISUNICODEPUNCTBEFORE(off) md_is_unicode_punct__(md_decode_utf8_before__(ctx, off))
+
+ static inline unsigned
+ md_decode_unicode(const CHAR* str, OFF off, SZ str_size, SZ* p_char_size)
+ {
+ return md_decode_utf8__(str+off, str_size-off, p_char_size);
+ }
+#else
+ #define ISUNICODEWHITESPACE_(codepoint) ISWHITESPACE_(codepoint)
+ #define ISUNICODEWHITESPACE(off) ISWHITESPACE(off)
+ #define ISUNICODEWHITESPACEBEFORE(off) ISWHITESPACE((off)-1)
+
+ #define ISUNICODEPUNCT(off) ISPUNCT(off)
+ #define ISUNICODEPUNCTBEFORE(off) ISPUNCT((off)-1)
+
+ static inline void
+ md_get_unicode_fold_info(unsigned codepoint, MD_UNICODE_FOLD_INFO* info)
+ {
+ info->codepoints[0] = codepoint;
+ if(ISUPPER_(codepoint))
+ info->codepoints[0] += 'a' - 'A';
+ info->n_codepoints = 1;
+ }
+
+ static inline unsigned
+ md_decode_unicode(const CHAR* str, OFF off, SZ str_size, SZ* p_size)
+ {
+ *p_size = 1;
+ return (unsigned) str[off];
+ }
+#endif
+
+
+/*************************************
+ *** Helper string manipulations ***
+ *************************************/
+
+/* Fill buffer with copy of the string between 'beg' and 'end' but replace any
+ * line breaks with given replacement character.
+ *
+ * NOTE: Caller is responsible to make sure the buffer is large enough.
+ * (Given the output is always shorter then input, (end - beg) is good idea
+ * what the caller should allocate.)
+ */
+static void
+md_merge_lines(MD_CTX* ctx, OFF beg, OFF end, const MD_LINE* lines, int n_lines,
+ CHAR line_break_replacement_char, CHAR* buffer, SZ* p_size)
+{
+ CHAR* ptr = buffer;
+ int line_index = 0;
+ OFF off = beg;
+
+ MD_UNUSED(n_lines);
+
+ while(1) {
+ const MD_LINE* line = &lines[line_index];
+ OFF line_end = line->end;
+ if(end < line_end)
+ line_end = end;
+
+ while(off < line_end) {
+ *ptr = CH(off);
+ ptr++;
+ off++;
+ }
+
+ if(off >= end) {
+ *p_size = (MD_SIZE)(ptr - buffer);
+ return;
+ }
+
+ *ptr = line_break_replacement_char;
+ ptr++;
+
+ line_index++;
+ off = lines[line_index].beg;
+ }
+}
+
+/* Wrapper of md_merge_lines() which allocates new buffer for the output string.
+ */
+static int
+md_merge_lines_alloc(MD_CTX* ctx, OFF beg, OFF end, const MD_LINE* lines, int n_lines,
+ CHAR line_break_replacement_char, CHAR** p_str, SZ* p_size)
+{
+ CHAR* buffer;
+
+ buffer = (CHAR*) malloc(sizeof(CHAR) * (end - beg));
+ if(buffer == NULL) {
+ MD_LOG("malloc() failed.");
+ return -1;
+ }
+
+ md_merge_lines(ctx, beg, end, lines, n_lines,
+ line_break_replacement_char, buffer, p_size);
+
+ *p_str = buffer;
+ return 0;
+}
+
+static OFF
+md_skip_unicode_whitespace(const CHAR* label, OFF off, SZ size)
+{
+ SZ char_size;
+ unsigned codepoint;
+
+ while(off < size) {
+ codepoint = md_decode_unicode(label, off, size, &char_size);
+ if(!ISUNICODEWHITESPACE_(codepoint) && !ISNEWLINE_(label[off]))
+ break;
+ off += char_size;
+ }
+
+ return off;
+}
+
+
+/******************************
+ *** Recognizing raw HTML ***
+ ******************************/
+
+/* md_is_html_tag() may be called when processing inlines (inline raw HTML)
+ * or when breaking document to blocks (checking for start of HTML block type 7).
+ *
+ * When breaking document to blocks, we do not yet know line boundaries, but
+ * in that case the whole tag has to live on a single line. We distinguish this
+ * by n_lines == 0.
+ */
+static int
+md_is_html_tag(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg, OFF max_end, OFF* p_end)
+{
+ int attr_state;
+ OFF off = beg;
+ OFF line_end = (n_lines > 0) ? lines[0].end : ctx->size;
+ int i = 0;
+
+ MD_ASSERT(CH(beg) == _T('<'));
+
+ if(off + 1 >= line_end)
+ return FALSE;
+ off++;
+
+ /* For parsing attributes, we need a little state automaton below.
+ * State -1: no attributes are allowed.
+ * State 0: attribute could follow after some whitespace.
+ * State 1: after a whitespace (attribute name may follow).
+ * State 2: after attribute name ('=' MAY follow).
+ * State 3: after '=' (value specification MUST follow).
+ * State 41: in middle of unquoted attribute value.
+ * State 42: in middle of single-quoted attribute value.
+ * State 43: in middle of double-quoted attribute value.
+ */
+ attr_state = 0;
+
+ if(CH(off) == _T('/')) {
+ /* Closer tag "</ ... >". No attributes may be present. */
+ attr_state = -1;
+ off++;
+ }
+
+ /* Tag name */
+ if(off >= line_end || !ISALPHA(off))
+ return FALSE;
+ off++;
+ while(off < line_end && (ISALNUM(off) || CH(off) == _T('-')))
+ off++;
+
+ /* (Optional) attributes (if not closer), (optional) '/' (if not closer)
+ * and final '>'. */
+ while(1) {
+ while(off < line_end && !ISNEWLINE(off)) {
+ if(attr_state > 40) {
+ if(attr_state == 41 && (ISBLANK(off) || ISANYOF(off, _T("\"'=<>`")))) {
+ attr_state = 0;
+ off--; /* Put the char back for re-inspection in the new state. */
+ } else if(attr_state == 42 && CH(off) == _T('\'')) {
+ attr_state = 0;
+ } else if(attr_state == 43 && CH(off) == _T('"')) {
+ attr_state = 0;
+ }
+ off++;
+ } else if(ISWHITESPACE(off)) {
+ if(attr_state == 0)
+ attr_state = 1;
+ off++;
+ } else if(attr_state <= 2 && CH(off) == _T('>')) {
+ /* End. */
+ goto done;
+ } else if(attr_state <= 2 && CH(off) == _T('/') && off+1 < line_end && CH(off+1) == _T('>')) {
+ /* End with digraph '/>' */
+ off++;
+ goto done;
+ } else if((attr_state == 1 || attr_state == 2) && (ISALPHA(off) || CH(off) == _T('_') || CH(off) == _T(':'))) {
+ off++;
+ /* Attribute name */
+ while(off < line_end && (ISALNUM(off) || ISANYOF(off, _T("_.:-"))))
+ off++;
+ attr_state = 2;
+ } else if(attr_state == 2 && CH(off) == _T('=')) {
+ /* Attribute assignment sign */
+ off++;
+ attr_state = 3;
+ } else if(attr_state == 3) {
+ /* Expecting start of attribute value. */
+ if(CH(off) == _T('"'))
+ attr_state = 43;
+ else if(CH(off) == _T('\''))
+ attr_state = 42;
+ else if(!ISANYOF(off, _T("\"'=<>`")) && !ISNEWLINE(off))
+ attr_state = 41;
+ else
+ return FALSE;
+ off++;
+ } else {
+ /* Anything unexpected. */
+ return FALSE;
+ }
+ }
+
+ /* We have to be on a single line. See definition of start condition
+ * of HTML block, type 7. */
+ if(n_lines == 0)
+ return FALSE;
+
+ i++;
+ if(i >= n_lines)
+ return FALSE;
+
+ off = lines[i].beg;
+ line_end = lines[i].end;
+
+ if(attr_state == 0 || attr_state == 41)
+ attr_state = 1;
+
+ if(off >= max_end)
+ return FALSE;
+ }
+
+done:
+ if(off >= max_end)
+ return FALSE;
+
+ *p_end = off+1;
+ return TRUE;
+}
+
+static int
+md_scan_for_html_closer(MD_CTX* ctx, const MD_CHAR* str, MD_SIZE len,
+ const MD_LINE* lines, int n_lines,
+ OFF beg, OFF max_end, OFF* p_end,
+ OFF* p_scan_horizon)
+{
+ OFF off = beg;
+ int i = 0;
+
+ if(off < *p_scan_horizon && *p_scan_horizon >= max_end - len) {
+ /* We have already scanned the range up to the max_end so we know
+ * there is nothing to see. */
+ return FALSE;
+ }
+
+ while(TRUE) {
+ while(off + len <= lines[i].end && off + len <= max_end) {
+ if(md_ascii_eq(STR(off), str, len)) {
+ /* Success. */
+ *p_end = off + len;
+ return TRUE;
+ }
+ off++;
+ }
+
+ i++;
+ if(off >= max_end || i >= n_lines) {
+ /* Failure. */
+ *p_scan_horizon = off;
+ return FALSE;
+ }
+
+ off = lines[i].beg;
+ }
+}
+
+static int
+md_is_html_comment(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg, OFF max_end, OFF* p_end)
+{
+ OFF off = beg;
+
+ MD_ASSERT(CH(beg) == _T('<'));
+
+ if(off + 4 >= lines[0].end)
+ return FALSE;
+ if(CH(off+1) != _T('!') || CH(off+2) != _T('-') || CH(off+3) != _T('-'))
+ return FALSE;
+ off += 4;
+
+ /* ">" and "->" must not follow the opening. */
+ if(off < lines[0].end && CH(off) == _T('>'))
+ return FALSE;
+ if(off+1 < lines[0].end && CH(off) == _T('-') && CH(off+1) == _T('>'))
+ return FALSE;
+
+ /* HTML comment must not contain "--", so we scan just for "--" instead
+ * of "-->" and verify manually that '>' follows. */
+ if(md_scan_for_html_closer(ctx, _T("--"), 2,
+ lines, n_lines, off, max_end, p_end, &ctx->html_comment_horizon))
+ {
+ if(*p_end < max_end && CH(*p_end) == _T('>')) {
+ *p_end = *p_end + 1;
+ return TRUE;
+ }
+ }
+
+ return FALSE;
+}
+
+static int
+md_is_html_processing_instruction(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg, OFF max_end, OFF* p_end)
+{
+ OFF off = beg;
+
+ if(off + 2 >= lines[0].end)
+ return FALSE;
+ if(CH(off+1) != _T('?'))
+ return FALSE;
+ off += 2;
+
+ return md_scan_for_html_closer(ctx, _T("?>"), 2,
+ lines, n_lines, off, max_end, p_end, &ctx->html_proc_instr_horizon);
+}
+
+static int
+md_is_html_declaration(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg, OFF max_end, OFF* p_end)
+{
+ OFF off = beg;
+
+ if(off + 2 >= lines[0].end)
+ return FALSE;
+ if(CH(off+1) != _T('!'))
+ return FALSE;
+ off += 2;
+
+ /* Declaration name. */
+ if(off >= lines[0].end || !ISALPHA(off))
+ return FALSE;
+ off++;
+ while(off < lines[0].end && ISALPHA(off))
+ off++;
+ if(off < lines[0].end && !ISWHITESPACE(off))
+ return FALSE;
+
+ return md_scan_for_html_closer(ctx, _T(">"), 1,
+ lines, n_lines, off, max_end, p_end, &ctx->html_decl_horizon);
+}
+
+static int
+md_is_html_cdata(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg, OFF max_end, OFF* p_end)
+{
+ static const CHAR open_str[] = _T("<![CDATA[");
+ static const SZ open_size = SIZEOF_ARRAY(open_str) - 1;
+
+ OFF off = beg;
+
+ if(off + open_size >= lines[0].end)
+ return FALSE;
+ if(memcmp(STR(off), open_str, open_size) != 0)
+ return FALSE;
+ off += open_size;
+
+ if(lines[n_lines-1].end < max_end)
+ max_end = lines[n_lines-1].end - 2;
+
+ return md_scan_for_html_closer(ctx, _T("]]>"), 3,
+ lines, n_lines, off, max_end, p_end, &ctx->html_cdata_horizon);
+}
+
+static int
+md_is_html_any(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg, OFF max_end, OFF* p_end)
+{
+ MD_ASSERT(CH(beg) == _T('<'));
+ return (md_is_html_tag(ctx, lines, n_lines, beg, max_end, p_end) ||
+ md_is_html_comment(ctx, lines, n_lines, beg, max_end, p_end) ||
+ md_is_html_processing_instruction(ctx, lines, n_lines, beg, max_end, p_end) ||
+ md_is_html_declaration(ctx, lines, n_lines, beg, max_end, p_end) ||
+ md_is_html_cdata(ctx, lines, n_lines, beg, max_end, p_end));
+}
+
+
+/****************************
+ *** Recognizing Entity ***
+ ****************************/
+
+static int
+md_is_hex_entity_contents(MD_CTX* ctx, const CHAR* text, OFF beg, OFF max_end, OFF* p_end)
+{
+ OFF off = beg;
+ MD_UNUSED(ctx);
+
+ while(off < max_end && ISXDIGIT_(text[off]) && off - beg <= 8)
+ off++;
+
+ if(1 <= off - beg && off - beg <= 6) {
+ *p_end = off;
+ return TRUE;
+ } else {
+ return FALSE;
+ }
+}
+
+static int
+md_is_dec_entity_contents(MD_CTX* ctx, const CHAR* text, OFF beg, OFF max_end, OFF* p_end)
+{
+ OFF off = beg;
+ MD_UNUSED(ctx);
+
+ while(off < max_end && ISDIGIT_(text[off]) && off - beg <= 8)
+ off++;
+
+ if(1 <= off - beg && off - beg <= 7) {
+ *p_end = off;
+ return TRUE;
+ } else {
+ return FALSE;
+ }
+}
+
+static int
+md_is_named_entity_contents(MD_CTX* ctx, const CHAR* text, OFF beg, OFF max_end, OFF* p_end)
+{
+ OFF off = beg;
+ MD_UNUSED(ctx);
+
+ if(off < max_end && ISALPHA_(text[off]))
+ off++;
+ else
+ return FALSE;
+
+ while(off < max_end && ISALNUM_(text[off]) && off - beg <= 48)
+ off++;
+
+ if(2 <= off - beg && off - beg <= 48) {
+ *p_end = off;
+ return TRUE;
+ } else {
+ return FALSE;
+ }
+}
+
+static int
+md_is_entity_str(MD_CTX* ctx, const CHAR* text, OFF beg, OFF max_end, OFF* p_end)
+{
+ int is_contents;
+ OFF off = beg;
+
+ MD_ASSERT(text[off] == _T('&'));
+ off++;
+
+ if(off+2 < max_end && text[off] == _T('#') && (text[off+1] == _T('x') || text[off+1] == _T('X')))
+ is_contents = md_is_hex_entity_contents(ctx, text, off+2, max_end, &off);
+ else if(off+1 < max_end && text[off] == _T('#'))
+ is_contents = md_is_dec_entity_contents(ctx, text, off+1, max_end, &off);
+ else
+ is_contents = md_is_named_entity_contents(ctx, text, off, max_end, &off);
+
+ if(is_contents && off < max_end && text[off] == _T(';')) {
+ *p_end = off+1;
+ return TRUE;
+ } else {
+ return FALSE;
+ }
+}
+
+static inline int
+md_is_entity(MD_CTX* ctx, OFF beg, OFF max_end, OFF* p_end)
+{
+ return md_is_entity_str(ctx, ctx->text, beg, max_end, p_end);
+}
+
+
+/******************************
+ *** Attribute Management ***
+ ******************************/
+
+typedef struct MD_ATTRIBUTE_BUILD_tag MD_ATTRIBUTE_BUILD;
+struct MD_ATTRIBUTE_BUILD_tag {
+ CHAR* text;
+ MD_TEXTTYPE* substr_types;
+ OFF* substr_offsets;
+ int substr_count;
+ int substr_alloc;
+ MD_TEXTTYPE trivial_types[1];
+ OFF trivial_offsets[2];
+};
+
+
+#define MD_BUILD_ATTR_NO_ESCAPES 0x0001
+
+static int
+md_build_attr_append_substr(MD_CTX* ctx, MD_ATTRIBUTE_BUILD* build,
+ MD_TEXTTYPE type, OFF off)
+{
+ if(build->substr_count >= build->substr_alloc) {
+ MD_TEXTTYPE* new_substr_types;
+ OFF* new_substr_offsets;
+
+ build->substr_alloc = (build->substr_alloc > 0
+ ? build->substr_alloc + build->substr_alloc / 2
+ : 8);
+ new_substr_types = (MD_TEXTTYPE*) realloc(build->substr_types,
+ build->substr_alloc * sizeof(MD_TEXTTYPE));
+ if(new_substr_types == NULL) {
+ MD_LOG("realloc() failed.");
+ return -1;
+ }
+ /* Note +1 to reserve space for final offset (== raw_size). */
+ new_substr_offsets = (OFF*) realloc(build->substr_offsets,
+ (build->substr_alloc+1) * sizeof(OFF));
+ if(new_substr_offsets == NULL) {
+ MD_LOG("realloc() failed.");
+ free(new_substr_types);
+ return -1;
+ }
+
+ build->substr_types = new_substr_types;
+ build->substr_offsets = new_substr_offsets;
+ }
+
+ build->substr_types[build->substr_count] = type;
+ build->substr_offsets[build->substr_count] = off;
+ build->substr_count++;
+ return 0;
+}
+
+static void
+md_free_attribute(MD_CTX* ctx, MD_ATTRIBUTE_BUILD* build)
+{
+ MD_UNUSED(ctx);
+
+ if(build->substr_alloc > 0) {
+ free(build->text);
+ free(build->substr_types);
+ free(build->substr_offsets);
+ }
+}
+
+static int
+md_build_attribute(MD_CTX* ctx, const CHAR* raw_text, SZ raw_size,
+ unsigned flags, MD_ATTRIBUTE* attr, MD_ATTRIBUTE_BUILD* build)
+{
+ OFF raw_off, off;
+ int is_trivial;
+ int ret = 0;
+
+ memset(build, 0, sizeof(MD_ATTRIBUTE_BUILD));
+
+ /* If there is no backslash and no ampersand, build trivial attribute
+ * without any malloc(). */
+ is_trivial = TRUE;
+ for(raw_off = 0; raw_off < raw_size; raw_off++) {
+ if(ISANYOF3_(raw_text[raw_off], _T('\\'), _T('&'), _T('\0'))) {
+ is_trivial = FALSE;
+ break;
+ }
+ }
+
+ if(is_trivial) {
+ build->text = (CHAR*) (raw_size ? raw_text : NULL);
+ build->substr_types = build->trivial_types;
+ build->substr_offsets = build->trivial_offsets;
+ build->substr_count = 1;
+ build->substr_alloc = 0;
+ build->trivial_types[0] = MD_TEXT_NORMAL;
+ build->trivial_offsets[0] = 0;
+ build->trivial_offsets[1] = raw_size;
+ off = raw_size;
+ } else {
+ build->text = (CHAR*) malloc(raw_size * sizeof(CHAR));
+ if(build->text == NULL) {
+ MD_LOG("malloc() failed.");
+ goto abort;
+ }
+
+ raw_off = 0;
+ off = 0;
+
+ while(raw_off < raw_size) {
+ if(raw_text[raw_off] == _T('\0')) {
+ MD_CHECK(md_build_attr_append_substr(ctx, build, MD_TEXT_NULLCHAR, off));
+ memcpy(build->text + off, raw_text + raw_off, 1);
+ off++;
+ raw_off++;
+ continue;
+ }
+
+ if(raw_text[raw_off] == _T('&')) {
+ OFF ent_end;
+
+ if(md_is_entity_str(ctx, raw_text, raw_off, raw_size, &ent_end)) {
+ MD_CHECK(md_build_attr_append_substr(ctx, build, MD_TEXT_ENTITY, off));
+ memcpy(build->text + off, raw_text + raw_off, ent_end - raw_off);
+ off += ent_end - raw_off;
+ raw_off = ent_end;
+ continue;
+ }
+ }
+
+ if(build->substr_count == 0 || build->substr_types[build->substr_count-1] != MD_TEXT_NORMAL)
+ MD_CHECK(md_build_attr_append_substr(ctx, build, MD_TEXT_NORMAL, off));
+
+ if(!(flags & MD_BUILD_ATTR_NO_ESCAPES) &&
+ raw_text[raw_off] == _T('\\') && raw_off+1 < raw_size &&
+ (ISPUNCT_(raw_text[raw_off+1]) || ISNEWLINE_(raw_text[raw_off+1])))
+ raw_off++;
+
+ build->text[off++] = raw_text[raw_off++];
+ }
+ build->substr_offsets[build->substr_count] = off;
+ }
+
+ attr->text = build->text;
+ attr->size = off;
+ attr->substr_offsets = build->substr_offsets;
+ attr->substr_types = build->substr_types;
+ return 0;
+
+abort:
+ md_free_attribute(ctx, build);
+ return -1;
+}
+
+
+/*********************************************
+ *** Dictionary of Reference Definitions ***
+ *********************************************/
+
+#define MD_FNV1A_BASE 2166136261U
+#define MD_FNV1A_PRIME 16777619U
+
+static inline unsigned
+md_fnv1a(unsigned base, const void* data, size_t n)
+{
+ const unsigned char* buf = (const unsigned char*) data;
+ unsigned hash = base;
+ size_t i;
+
+ for(i = 0; i < n; i++) {
+ hash ^= buf[i];
+ hash *= MD_FNV1A_PRIME;
+ }
+
+ return hash;
+}
+
+
+struct MD_REF_DEF_tag {
+ CHAR* label;
+ CHAR* title;
+ unsigned hash;
+ SZ label_size;
+ SZ title_size;
+ OFF dest_beg;
+ OFF dest_end;
+ unsigned char label_needs_free : 1;
+ unsigned char title_needs_free : 1;
+};
+
+/* Label equivalence is quite complicated with regards to whitespace and case
+ * folding. This complicates computing a hash of it as well as direct comparison
+ * of two labels. */
+
+static unsigned
+md_link_label_hash(const CHAR* label, SZ size)
+{
+ unsigned hash = MD_FNV1A_BASE;
+ OFF off;
+ unsigned codepoint;
+ int is_whitespace = FALSE;
+
+ off = md_skip_unicode_whitespace(label, 0, size);
+ while(off < size) {
+ SZ char_size;
+
+ codepoint = md_decode_unicode(label, off, size, &char_size);
+ is_whitespace = ISUNICODEWHITESPACE_(codepoint) || ISNEWLINE_(label[off]);
+
+ if(is_whitespace) {
+ codepoint = ' ';
+ hash = md_fnv1a(hash, &codepoint, sizeof(unsigned));
+ off = md_skip_unicode_whitespace(label, off, size);
+ } else {
+ MD_UNICODE_FOLD_INFO fold_info;
+
+ md_get_unicode_fold_info(codepoint, &fold_info);
+ hash = md_fnv1a(hash, fold_info.codepoints, fold_info.n_codepoints * sizeof(unsigned));
+ off += char_size;
+ }
+ }
+
+ return hash;
+}
+
+static OFF
+md_link_label_cmp_load_fold_info(const CHAR* label, OFF off, SZ size,
+ MD_UNICODE_FOLD_INFO* fold_info)
+{
+ unsigned codepoint;
+ SZ char_size;
+
+ if(off >= size) {
+ /* Treat end of a link label as a whitespace. */
+ goto whitespace;
+ }
+
+ codepoint = md_decode_unicode(label, off, size, &char_size);
+ off += char_size;
+ if(ISUNICODEWHITESPACE_(codepoint)) {
+ /* Treat all whitespace as equivalent */
+ goto whitespace;
+ }
+
+ /* Get real folding info. */
+ md_get_unicode_fold_info(codepoint, fold_info);
+ return off;
+
+whitespace:
+ fold_info->codepoints[0] = _T(' ');
+ fold_info->n_codepoints = 1;
+ return md_skip_unicode_whitespace(label, off, size);
+}
+
+static int
+md_link_label_cmp(const CHAR* a_label, SZ a_size, const CHAR* b_label, SZ b_size)
+{
+ OFF a_off;
+ OFF b_off;
+ MD_UNICODE_FOLD_INFO a_fi = { { 0 }, 0 };
+ MD_UNICODE_FOLD_INFO b_fi = { { 0 }, 0 };
+ OFF a_fi_off = 0;
+ OFF b_fi_off = 0;
+ int cmp;
+
+ a_off = md_skip_unicode_whitespace(a_label, 0, a_size);
+ b_off = md_skip_unicode_whitespace(b_label, 0, b_size);
+ while(a_off < a_size || a_fi_off < a_fi.n_codepoints ||
+ b_off < b_size || b_fi_off < b_fi.n_codepoints)
+ {
+ /* If needed, load fold info for next char. */
+ if(a_fi_off >= a_fi.n_codepoints) {
+ a_fi_off = 0;
+ a_off = md_link_label_cmp_load_fold_info(a_label, a_off, a_size, &a_fi);
+ }
+ if(b_fi_off >= b_fi.n_codepoints) {
+ b_fi_off = 0;
+ b_off = md_link_label_cmp_load_fold_info(b_label, b_off, b_size, &b_fi);
+ }
+
+ cmp = b_fi.codepoints[b_fi_off] - a_fi.codepoints[a_fi_off];
+ if(cmp != 0)
+ return cmp;
+
+ a_fi_off++;
+ b_fi_off++;
+ }
+
+ return 0;
+}
+
+typedef struct MD_REF_DEF_LIST_tag MD_REF_DEF_LIST;
+struct MD_REF_DEF_LIST_tag {
+ int n_ref_defs;
+ int alloc_ref_defs;
+ MD_REF_DEF* ref_defs[]; /* Valid items always point into ctx->ref_defs[] */
+};
+
+static int
+md_ref_def_cmp(const void* a, const void* b)
+{
+ const MD_REF_DEF* a_ref = *(const MD_REF_DEF**)a;
+ const MD_REF_DEF* b_ref = *(const MD_REF_DEF**)b;
+
+ if(a_ref->hash < b_ref->hash)
+ return -1;
+ else if(a_ref->hash > b_ref->hash)
+ return +1;
+ else
+ return md_link_label_cmp(a_ref->label, a_ref->label_size, b_ref->label, b_ref->label_size);
+}
+
+static int
+md_ref_def_cmp_for_sort(const void* a, const void* b)
+{
+ int cmp;
+
+ cmp = md_ref_def_cmp(a, b);
+
+ /* Ensure stability of the sorting. */
+ if(cmp == 0) {
+ const MD_REF_DEF* a_ref = *(const MD_REF_DEF**)a;
+ const MD_REF_DEF* b_ref = *(const MD_REF_DEF**)b;
+
+ if(a_ref < b_ref)
+ cmp = -1;
+ else if(a_ref > b_ref)
+ cmp = +1;
+ else
+ cmp = 0;
+ }
+
+ return cmp;
+}
+
+static int
+md_build_ref_def_hashtable(MD_CTX* ctx)
+{
+ int i, j;
+
+ if(ctx->n_ref_defs == 0)
+ return 0;
+
+ ctx->ref_def_hashtable_size = (ctx->n_ref_defs * 5) / 4;
+ ctx->ref_def_hashtable = malloc(ctx->ref_def_hashtable_size * sizeof(void*));
+ if(ctx->ref_def_hashtable == NULL) {
+ MD_LOG("malloc() failed.");
+ goto abort;
+ }
+ memset(ctx->ref_def_hashtable, 0, ctx->ref_def_hashtable_size * sizeof(void*));
+
+ /* Each member of ctx->ref_def_hashtable[] can be:
+ * -- NULL,
+ * -- pointer to the MD_REF_DEF in ctx->ref_defs[], or
+ * -- pointer to a MD_REF_DEF_LIST, which holds multiple pointers to
+ * such MD_REF_DEFs.
+ */
+ for(i = 0; i < ctx->n_ref_defs; i++) {
+ MD_REF_DEF* def = &ctx->ref_defs[i];
+ void* bucket;
+ MD_REF_DEF_LIST* list;
+
+ def->hash = md_link_label_hash(def->label, def->label_size);
+ bucket = ctx->ref_def_hashtable[def->hash % ctx->ref_def_hashtable_size];
+
+ if(bucket == NULL) {
+ /* The bucket is empty. Make it just point to the def. */
+ ctx->ref_def_hashtable[def->hash % ctx->ref_def_hashtable_size] = def;
+ continue;
+ }
+
+ if(ctx->ref_defs <= (MD_REF_DEF*) bucket && (MD_REF_DEF*) bucket < ctx->ref_defs + ctx->n_ref_defs) {
+ /* The bucket already contains one ref. def. Lets see whether it
+ * is the same label (ref. def. duplicate) or different one
+ * (hash conflict). */
+ MD_REF_DEF* old_def = (MD_REF_DEF*) bucket;
+
+ if(md_link_label_cmp(def->label, def->label_size, old_def->label, old_def->label_size) == 0) {
+ /* Duplicate label: Ignore this ref. def. */
+ continue;
+ }
+
+ /* Make the bucket complex, i.e. able to hold more ref. defs. */
+ list = (MD_REF_DEF_LIST*) malloc(sizeof(MD_REF_DEF_LIST) + 2 * sizeof(MD_REF_DEF*));
+ if(list == NULL) {
+ MD_LOG("malloc() failed.");
+ goto abort;
+ }
+ list->ref_defs[0] = old_def;
+ list->ref_defs[1] = def;
+ list->n_ref_defs = 2;
+ list->alloc_ref_defs = 2;
+ ctx->ref_def_hashtable[def->hash % ctx->ref_def_hashtable_size] = list;
+ continue;
+ }
+
+ /* Append the def to the complex bucket list.
+ *
+ * Note in this case we ignore potential duplicates to avoid expensive
+ * iterating over the complex bucket. Below, we revisit all the complex
+ * buckets and handle it more cheaply after the complex bucket contents
+ * is sorted. */
+ list = (MD_REF_DEF_LIST*) bucket;
+ if(list->n_ref_defs >= list->alloc_ref_defs) {
+ int alloc_ref_defs = list->alloc_ref_defs + list->alloc_ref_defs / 2;
+ MD_REF_DEF_LIST* list_tmp = (MD_REF_DEF_LIST*) realloc(list,
+ sizeof(MD_REF_DEF_LIST) + alloc_ref_defs * sizeof(MD_REF_DEF*));
+ if(list_tmp == NULL) {
+ MD_LOG("realloc() failed.");
+ goto abort;
+ }
+ list = list_tmp;
+ list->alloc_ref_defs = alloc_ref_defs;
+ ctx->ref_def_hashtable[def->hash % ctx->ref_def_hashtable_size] = list;
+ }
+
+ list->ref_defs[list->n_ref_defs] = def;
+ list->n_ref_defs++;
+ }
+
+ /* Sort the complex buckets so we can use bsearch() with them. */
+ for(i = 0; i < ctx->ref_def_hashtable_size; i++) {
+ void* bucket = ctx->ref_def_hashtable[i];
+ MD_REF_DEF_LIST* list;
+
+ if(bucket == NULL)
+ continue;
+ if(ctx->ref_defs <= (MD_REF_DEF*) bucket && (MD_REF_DEF*) bucket < ctx->ref_defs + ctx->n_ref_defs)
+ continue;
+
+ list = (MD_REF_DEF_LIST*) bucket;
+ qsort(list->ref_defs, list->n_ref_defs, sizeof(MD_REF_DEF*), md_ref_def_cmp_for_sort);
+
+ /* Disable all duplicates in the complex bucket by forcing all such
+ * records to point to the 1st such ref. def. I.e. no matter which
+ * record is found during the lookup, it will always point to the right
+ * ref. def. in ctx->ref_defs[]. */
+ for(j = 1; j < list->n_ref_defs; j++) {
+ if(md_ref_def_cmp(&list->ref_defs[j-1], &list->ref_defs[j]) == 0)
+ list->ref_defs[j] = list->ref_defs[j-1];
+ }
+ }
+
+ return 0;
+
+abort:
+ return -1;
+}
+
+static void
+md_free_ref_def_hashtable(MD_CTX* ctx)
+{
+ if(ctx->ref_def_hashtable != NULL) {
+ int i;
+
+ for(i = 0; i < ctx->ref_def_hashtable_size; i++) {
+ void* bucket = ctx->ref_def_hashtable[i];
+ if(bucket == NULL)
+ continue;
+ if(ctx->ref_defs <= (MD_REF_DEF*) bucket && (MD_REF_DEF*) bucket < ctx->ref_defs + ctx->n_ref_defs)
+ continue;
+ free(bucket);
+ }
+
+ free(ctx->ref_def_hashtable);
+ }
+}
+
+static const MD_REF_DEF*
+md_lookup_ref_def(MD_CTX* ctx, const CHAR* label, SZ label_size)
+{
+ unsigned hash;
+ void* bucket;
+
+ if(ctx->ref_def_hashtable_size == 0)
+ return NULL;
+
+ hash = md_link_label_hash(label, label_size);
+ bucket = ctx->ref_def_hashtable[hash % ctx->ref_def_hashtable_size];
+
+ if(bucket == NULL) {
+ return NULL;
+ } else if(ctx->ref_defs <= (MD_REF_DEF*) bucket && (MD_REF_DEF*) bucket < ctx->ref_defs + ctx->n_ref_defs) {
+ const MD_REF_DEF* def = (MD_REF_DEF*) bucket;
+
+ if(md_link_label_cmp(def->label, def->label_size, label, label_size) == 0)
+ return def;
+ else
+ return NULL;
+ } else {
+ MD_REF_DEF_LIST* list = (MD_REF_DEF_LIST*) bucket;
+ MD_REF_DEF key_buf;
+ const MD_REF_DEF* key = &key_buf;
+ const MD_REF_DEF** ret;
+
+ key_buf.label = (CHAR*) label;
+ key_buf.label_size = label_size;
+ key_buf.hash = md_link_label_hash(key_buf.label, key_buf.label_size);
+
+ ret = (const MD_REF_DEF**) bsearch(&key, list->ref_defs,
+ list->n_ref_defs, sizeof(MD_REF_DEF*), md_ref_def_cmp);
+ if(ret != NULL)
+ return *ret;
+ else
+ return NULL;
+ }
+}
+
+
+/***************************
+ *** Recognizing Links ***
+ ***************************/
+
+/* Note this code is partially shared between processing inlines and blocks
+ * as reference definitions and links share some helper parser functions.
+ */
+
+typedef struct MD_LINK_ATTR_tag MD_LINK_ATTR;
+struct MD_LINK_ATTR_tag {
+ OFF dest_beg;
+ OFF dest_end;
+
+ CHAR* title;
+ SZ title_size;
+ int title_needs_free;
+};
+
+
+static int
+md_is_link_label(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg,
+ OFF* p_end, int* p_beg_line_index, int* p_end_line_index,
+ OFF* p_contents_beg, OFF* p_contents_end)
+{
+ OFF off = beg;
+ OFF contents_beg = 0;
+ OFF contents_end = 0;
+ int line_index = 0;
+ int len = 0;
+
+ if(CH(off) != _T('['))
+ return FALSE;
+ off++;
+
+ while(1) {
+ OFF line_end = lines[line_index].end;
+
+ while(off < line_end) {
+ if(CH(off) == _T('\\') && off+1 < ctx->size && (ISPUNCT(off+1) || ISNEWLINE(off+1))) {
+ if(contents_end == 0) {
+ contents_beg = off;
+ *p_beg_line_index = line_index;
+ }
+ contents_end = off + 2;
+ off += 2;
+ } else if(CH(off) == _T('[')) {
+ return FALSE;
+ } else if(CH(off) == _T(']')) {
+ if(contents_beg < contents_end) {
+ /* Success. */
+ *p_contents_beg = contents_beg;
+ *p_contents_end = contents_end;
+ *p_end = off+1;
+ *p_end_line_index = line_index;
+ return TRUE;
+ } else {
+ /* Link label must have some non-whitespace contents. */
+ return FALSE;
+ }
+ } else {
+ unsigned codepoint;
+ SZ char_size;
+
+ codepoint = md_decode_unicode(ctx->text, off, ctx->size, &char_size);
+ if(!ISUNICODEWHITESPACE_(codepoint)) {
+ if(contents_end == 0) {
+ contents_beg = off;
+ *p_beg_line_index = line_index;
+ }
+ contents_end = off + char_size;
+ }
+
+ off += char_size;
+ }
+
+ len++;
+ if(len > 999)
+ return FALSE;
+ }
+
+ line_index++;
+ len++;
+ if(line_index < n_lines)
+ off = lines[line_index].beg;
+ else
+ break;
+ }
+
+ return FALSE;
+}
+
+static int
+md_is_link_destination_A(MD_CTX* ctx, OFF beg, OFF max_end, OFF* p_end,
+ OFF* p_contents_beg, OFF* p_contents_end)
+{
+ OFF off = beg;
+
+ if(off >= max_end || CH(off) != _T('<'))
+ return FALSE;
+ off++;
+
+ while(off < max_end) {
+ if(CH(off) == _T('\\') && off+1 < max_end && ISPUNCT(off+1)) {
+ off += 2;
+ continue;
+ }
+
+ if(ISNEWLINE(off) || CH(off) == _T('<'))
+ return FALSE;
+
+ if(CH(off) == _T('>')) {
+ /* Success. */
+ *p_contents_beg = beg+1;
+ *p_contents_end = off;
+ *p_end = off+1;
+ return TRUE;
+ }
+
+ off++;
+ }
+
+ return FALSE;
+}
+
+static int
+md_is_link_destination_B(MD_CTX* ctx, OFF beg, OFF max_end, OFF* p_end,
+ OFF* p_contents_beg, OFF* p_contents_end)
+{
+ OFF off = beg;
+ int parenthesis_level = 0;
+
+ while(off < max_end) {
+ if(CH(off) == _T('\\') && off+1 < max_end && ISPUNCT(off+1)) {
+ off += 2;
+ continue;
+ }
+
+ if(ISWHITESPACE(off) || ISCNTRL(off))
+ break;
+
+ /* Link destination may include balanced pairs of unescaped '(' ')'.
+ * Note we limit the maximal nesting level by 32 to protect us from
+ * https://github.com/jgm/cmark/issues/214 */
+ if(CH(off) == _T('(')) {
+ parenthesis_level++;
+ if(parenthesis_level > 32)
+ return FALSE;
+ } else if(CH(off) == _T(')')) {
+ if(parenthesis_level == 0)
+ break;
+ parenthesis_level--;
+ }
+
+ off++;
+ }
+
+ if(parenthesis_level != 0 || off == beg)
+ return FALSE;
+
+ /* Success. */
+ *p_contents_beg = beg;
+ *p_contents_end = off;
+ *p_end = off;
+ return TRUE;
+}
+
+static inline int
+md_is_link_destination(MD_CTX* ctx, OFF beg, OFF max_end, OFF* p_end,
+ OFF* p_contents_beg, OFF* p_contents_end)
+{
+ if(CH(beg) == _T('<'))
+ return md_is_link_destination_A(ctx, beg, max_end, p_end, p_contents_beg, p_contents_end);
+ else
+ return md_is_link_destination_B(ctx, beg, max_end, p_end, p_contents_beg, p_contents_end);
+}
+
+static int
+md_is_link_title(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg,
+ OFF* p_end, int* p_beg_line_index, int* p_end_line_index,
+ OFF* p_contents_beg, OFF* p_contents_end)
+{
+ OFF off = beg;
+ CHAR closer_char;
+ int line_index = 0;
+
+ /* White space with up to one line break. */
+ while(off < lines[line_index].end && ISWHITESPACE(off))
+ off++;
+ if(off >= lines[line_index].end) {
+ line_index++;
+ if(line_index >= n_lines)
+ return FALSE;
+ off = lines[line_index].beg;
+ }
+ if(off == beg)
+ return FALSE;
+
+ *p_beg_line_index = line_index;
+
+ /* First char determines how to detect end of it. */
+ switch(CH(off)) {
+ case _T('"'): closer_char = _T('"'); break;
+ case _T('\''): closer_char = _T('\''); break;
+ case _T('('): closer_char = _T(')'); break;
+ default: return FALSE;
+ }
+ off++;
+
+ *p_contents_beg = off;
+
+ while(line_index < n_lines) {
+ OFF line_end = lines[line_index].end;
+
+ while(off < line_end) {
+ if(CH(off) == _T('\\') && off+1 < ctx->size && (ISPUNCT(off+1) || ISNEWLINE(off+1))) {
+ off++;
+ } else if(CH(off) == closer_char) {
+ /* Success. */
+ *p_contents_end = off;
+ *p_end = off+1;
+ *p_end_line_index = line_index;
+ return TRUE;
+ } else if(closer_char == _T(')') && CH(off) == _T('(')) {
+ /* ()-style title cannot contain (unescaped '(')) */
+ return FALSE;
+ }
+
+ off++;
+ }
+
+ line_index++;
+ }
+
+ return FALSE;
+}
+
+/* Returns 0 if it is not a reference definition.
+ *
+ * Returns N > 0 if it is a reference definition. N then corresponds to the
+ * number of lines forming it). In this case the definition is stored for
+ * resolving any links referring to it.
+ *
+ * Returns -1 in case of an error (out of memory).
+ */
+static int
+md_is_link_reference_definition(MD_CTX* ctx, const MD_LINE* lines, int n_lines)
+{
+ OFF label_contents_beg;
+ OFF label_contents_end;
+ int label_contents_line_index = -1;
+ int label_is_multiline = FALSE;
+ OFF dest_contents_beg;
+ OFF dest_contents_end;
+ OFF title_contents_beg;
+ OFF title_contents_end;
+ int title_contents_line_index;
+ int title_is_multiline = FALSE;
+ OFF off;
+ int line_index = 0;
+ int tmp_line_index;
+ MD_REF_DEF* def = NULL;
+ int ret = 0;
+
+ /* Link label. */
+ if(!md_is_link_label(ctx, lines, n_lines, lines[0].beg,
+ &off, &label_contents_line_index, &line_index,
+ &label_contents_beg, &label_contents_end))
+ return FALSE;
+ label_is_multiline = (label_contents_line_index != line_index);
+
+ /* Colon. */
+ if(off >= lines[line_index].end || CH(off) != _T(':'))
+ return FALSE;
+ off++;
+
+ /* Optional white space with up to one line break. */
+ while(off < lines[line_index].end && ISWHITESPACE(off))
+ off++;
+ if(off >= lines[line_index].end) {
+ line_index++;
+ if(line_index >= n_lines)
+ return FALSE;
+ off = lines[line_index].beg;
+ }
+
+ /* Link destination. */
+ if(!md_is_link_destination(ctx, off, lines[line_index].end,
+ &off, &dest_contents_beg, &dest_contents_end))
+ return FALSE;
+
+ /* (Optional) title. Note we interpret it as an title only if nothing
+ * more follows on its last line. */
+ if(md_is_link_title(ctx, lines + line_index, n_lines - line_index, off,
+ &off, &title_contents_line_index, &tmp_line_index,
+ &title_contents_beg, &title_contents_end)
+ && off >= lines[line_index + tmp_line_index].end)
+ {
+ title_is_multiline = (tmp_line_index != title_contents_line_index);
+ title_contents_line_index += line_index;
+ line_index += tmp_line_index;
+ } else {
+ /* Not a title. */
+ title_is_multiline = FALSE;
+ title_contents_beg = off;
+ title_contents_end = off;
+ title_contents_line_index = 0;
+ }
+
+ /* Nothing more can follow on the last line. */
+ if(off < lines[line_index].end)
+ return FALSE;
+
+ /* So, it _is_ a reference definition. Remember it. */
+ if(ctx->n_ref_defs >= ctx->alloc_ref_defs) {
+ MD_REF_DEF* new_defs;
+
+ ctx->alloc_ref_defs = (ctx->alloc_ref_defs > 0
+ ? ctx->alloc_ref_defs + ctx->alloc_ref_defs / 2
+ : 16);
+ new_defs = (MD_REF_DEF*) realloc(ctx->ref_defs, ctx->alloc_ref_defs * sizeof(MD_REF_DEF));
+ if(new_defs == NULL) {
+ MD_LOG("realloc() failed.");
+ goto abort;
+ }
+
+ ctx->ref_defs = new_defs;
+ }
+ def = &ctx->ref_defs[ctx->n_ref_defs];
+ memset(def, 0, sizeof(MD_REF_DEF));
+
+ if(label_is_multiline) {
+ MD_CHECK(md_merge_lines_alloc(ctx, label_contents_beg, label_contents_end,
+ lines + label_contents_line_index, n_lines - label_contents_line_index,
+ _T(' '), &def->label, &def->label_size));
+ def->label_needs_free = TRUE;
+ } else {
+ def->label = (CHAR*) STR(label_contents_beg);
+ def->label_size = label_contents_end - label_contents_beg;
+ }
+
+ if(title_is_multiline) {
+ MD_CHECK(md_merge_lines_alloc(ctx, title_contents_beg, title_contents_end,
+ lines + title_contents_line_index, n_lines - title_contents_line_index,
+ _T('\n'), &def->title, &def->title_size));
+ def->title_needs_free = TRUE;
+ } else {
+ def->title = (CHAR*) STR(title_contents_beg);
+ def->title_size = title_contents_end - title_contents_beg;
+ }
+
+ def->dest_beg = dest_contents_beg;
+ def->dest_end = dest_contents_end;
+
+ /* Success. */
+ ctx->n_ref_defs++;
+ return line_index + 1;
+
+abort:
+ /* Failure. */
+ if(def != NULL && def->label_needs_free)
+ free(def->label);
+ if(def != NULL && def->title_needs_free)
+ free(def->title);
+ return ret;
+}
+
+static int
+md_is_link_reference(MD_CTX* ctx, const MD_LINE* lines, int n_lines,
+ OFF beg, OFF end, MD_LINK_ATTR* attr)
+{
+ const MD_REF_DEF* def;
+ const MD_LINE* beg_line;
+ const MD_LINE* end_line;
+ CHAR* label;
+ SZ label_size;
+ int ret;
+
+ MD_ASSERT(CH(beg) == _T('[') || CH(beg) == _T('!'));
+ MD_ASSERT(CH(end-1) == _T(']'));
+
+ beg += (CH(beg) == _T('!') ? 2 : 1);
+ end--;
+
+ /* Find lines corresponding to the beg and end positions. */
+ MD_ASSERT(lines[0].beg <= beg);
+ beg_line = lines;
+ while(beg >= beg_line->end)
+ beg_line++;
+
+ MD_ASSERT(end <= lines[n_lines-1].end);
+ end_line = beg_line;
+ while(end >= end_line->end)
+ end_line++;
+
+ if(beg_line != end_line) {
+ MD_CHECK(md_merge_lines_alloc(ctx, beg, end, beg_line,
+ (int)(n_lines - (beg_line - lines)), _T(' '), &label, &label_size));
+ } else {
+ label = (CHAR*) STR(beg);
+ label_size = end - beg;
+ }
+
+ def = md_lookup_ref_def(ctx, label, label_size);
+ if(def != NULL) {
+ attr->dest_beg = def->dest_beg;
+ attr->dest_end = def->dest_end;
+ attr->title = def->title;
+ attr->title_size = def->title_size;
+ attr->title_needs_free = FALSE;
+ }
+
+ if(beg_line != end_line)
+ free(label);
+
+ ret = (def != NULL);
+
+abort:
+ return ret;
+}
+
+static int
+md_is_inline_link_spec(MD_CTX* ctx, const MD_LINE* lines, int n_lines,
+ OFF beg, OFF* p_end, MD_LINK_ATTR* attr)
+{
+ int line_index = 0;
+ int tmp_line_index;
+ OFF title_contents_beg;
+ OFF title_contents_end;
+ int title_contents_line_index;
+ int title_is_multiline;
+ OFF off = beg;
+ int ret = FALSE;
+
+ while(off >= lines[line_index].end)
+ line_index++;
+
+ MD_ASSERT(CH(off) == _T('('));
+ off++;
+
+ /* Optional white space with up to one line break. */
+ while(off < lines[line_index].end && ISWHITESPACE(off))
+ off++;
+ if(off >= lines[line_index].end && ISNEWLINE(off)) {
+ line_index++;
+ if(line_index >= n_lines)
+ return FALSE;
+ off = lines[line_index].beg;
+ }
+
+ /* Link destination may be omitted, but only when not also having a title. */
+ if(off < ctx->size && CH(off) == _T(')')) {
+ attr->dest_beg = off;
+ attr->dest_end = off;
+ attr->title = NULL;
+ attr->title_size = 0;
+ attr->title_needs_free = FALSE;
+ off++;
+ *p_end = off;
+ return TRUE;
+ }
+
+ /* Link destination. */
+ if(!md_is_link_destination(ctx, off, lines[line_index].end,
+ &off, &attr->dest_beg, &attr->dest_end))
+ return FALSE;
+
+ /* (Optional) title. */
+ if(md_is_link_title(ctx, lines + line_index, n_lines - line_index, off,
+ &off, &title_contents_line_index, &tmp_line_index,
+ &title_contents_beg, &title_contents_end))
+ {
+ title_is_multiline = (tmp_line_index != title_contents_line_index);
+ title_contents_line_index += line_index;
+ line_index += tmp_line_index;
+ } else {
+ /* Not a title. */
+ title_is_multiline = FALSE;
+ title_contents_beg = off;
+ title_contents_end = off;
+ title_contents_line_index = 0;
+ }
+
+ /* Optional whitespace followed with final ')'. */
+ while(off < lines[line_index].end && ISWHITESPACE(off))
+ off++;
+ if(off >= lines[line_index].end && ISNEWLINE(off)) {
+ line_index++;
+ if(line_index >= n_lines)
+ return FALSE;
+ off = lines[line_index].beg;
+ }
+ if(CH(off) != _T(')'))
+ goto abort;
+ off++;
+
+ if(title_contents_beg >= title_contents_end) {
+ attr->title = NULL;
+ attr->title_size = 0;
+ attr->title_needs_free = FALSE;
+ } else if(!title_is_multiline) {
+ attr->title = (CHAR*) STR(title_contents_beg);
+ attr->title_size = title_contents_end - title_contents_beg;
+ attr->title_needs_free = FALSE;
+ } else {
+ MD_CHECK(md_merge_lines_alloc(ctx, title_contents_beg, title_contents_end,
+ lines + title_contents_line_index, n_lines - title_contents_line_index,
+ _T('\n'), &attr->title, &attr->title_size));
+ attr->title_needs_free = TRUE;
+ }
+
+ *p_end = off;
+ ret = TRUE;
+
+abort:
+ return ret;
+}
+
+static void
+md_free_ref_defs(MD_CTX* ctx)
+{
+ int i;
+
+ for(i = 0; i < ctx->n_ref_defs; i++) {
+ MD_REF_DEF* def = &ctx->ref_defs[i];
+
+ if(def->label_needs_free)
+ free(def->label);
+ if(def->title_needs_free)
+ free(def->title);
+ }
+
+ free(ctx->ref_defs);
+}
+
+
+/******************************************
+ *** Processing Inlines (a.k.a Spans) ***
+ ******************************************/
+
+/* We process inlines in few phases:
+ *
+ * (1) We go through the block text and collect all significant characters
+ * which may start/end a span or some other significant position into
+ * ctx->marks[]. Core of this is what md_collect_marks() does.
+ *
+ * We also do some very brief preliminary context-less analysis, whether
+ * it might be opener or closer (e.g. of an emphasis span).
+ *
+ * This speeds the other steps as we do not need to re-iterate over all
+ * characters anymore.
+ *
+ * (2) We analyze each potential mark types, in order by their precedence.
+ *
+ * In each md_analyze_XXX() function, we re-iterate list of the marks,
+ * skipping already resolved regions (in preceding precedences) and try to
+ * resolve them.
+ *
+ * (2.1) For trivial marks, which are single (e.g. HTML entity), we just mark
+ * them as resolved.
+ *
+ * (2.2) For range-type marks, we analyze whether the mark could be closer
+ * and, if yes, whether there is some preceding opener it could satisfy.
+ *
+ * If not we check whether it could be really an opener and if yes, we
+ * remember it so subsequent closers may resolve it.
+ *
+ * (3) Finally, when all marks were analyzed, we render the block contents
+ * by calling MD_RENDERER::text() callback, interrupting by ::enter_span()
+ * or ::close_span() whenever we reach a resolved mark.
+ */
+
+
+/* The mark structure.
+ *
+ * '\\': Maybe escape sequence.
+ * '\0': NULL char.
+ * '*': Maybe (strong) emphasis start/end.
+ * '_': Maybe (strong) emphasis start/end.
+ * '~': Maybe strikethrough start/end (needs MD_FLAG_STRIKETHROUGH).
+ * '`': Maybe code span start/end.
+ * '&': Maybe start of entity.
+ * ';': Maybe end of entity.
+ * '<': Maybe start of raw HTML or autolink.
+ * '>': Maybe end of raw HTML or autolink.
+ * '[': Maybe start of link label or link text.
+ * '!': Equivalent of '[' for image.
+ * ']': Maybe end of link label or link text.
+ * '@': Maybe permissive e-mail auto-link (needs MD_FLAG_PERMISSIVEEMAILAUTOLINKS).
+ * ':': Maybe permissive URL auto-link (needs MD_FLAG_PERMISSIVEURLAUTOLINKS).
+ * '.': Maybe permissive WWW auto-link (needs MD_FLAG_PERMISSIVEWWWAUTOLINKS).
+ * 'D': Dummy mark, it reserves a space for splitting a previous mark
+ * (e.g. emphasis) or to make more space for storing some special data
+ * related to the preceding mark (e.g. link).
+ *
+ * Note that not all instances of these chars in the text imply creation of the
+ * structure. Only those which have (or may have, after we see more context)
+ * the special meaning.
+ *
+ * (Keep this struct as small as possible to fit as much of them into CPU
+ * cache line.)
+ */
+struct MD_MARK_tag {
+ OFF beg;
+ OFF end;
+
+ /* For unresolved openers, 'prev' and 'next' form the chain of open openers
+ * of given type 'ch'.
+ *
+ * During resolving, we disconnect from the chain and point to the
+ * corresponding counterpart so opener points to its closer and vice versa.
+ */
+ int prev;
+ int next;
+ CHAR ch;
+ unsigned char flags;
+};
+
+/* Mark flags (these apply to ALL mark types). */
+#define MD_MARK_POTENTIAL_OPENER 0x01 /* Maybe opener. */
+#define MD_MARK_POTENTIAL_CLOSER 0x02 /* Maybe closer. */
+#define MD_MARK_OPENER 0x04 /* Definitely opener. */
+#define MD_MARK_CLOSER 0x08 /* Definitely closer. */
+#define MD_MARK_RESOLVED 0x10 /* Resolved in any definite way. */
+
+/* Mark flags specific for various mark types (so they can share bits). */
+#define MD_MARK_EMPH_INTRAWORD 0x20 /* Helper for the "rule of 3". */
+#define MD_MARK_EMPH_MOD3_0 0x40
+#define MD_MARK_EMPH_MOD3_1 0x80
+#define MD_MARK_EMPH_MOD3_2 (0x40 | 0x80)
+#define MD_MARK_EMPH_MOD3_MASK (0x40 | 0x80)
+#define MD_MARK_AUTOLINK 0x20 /* Distinguisher for '<', '>'. */
+#define MD_MARK_VALIDPERMISSIVEAUTOLINK 0x20 /* For permissive autolinks. */
+
+static MD_MARKCHAIN*
+md_asterisk_chain(MD_CTX* ctx, unsigned flags)
+{
+ switch(flags & (MD_MARK_EMPH_INTRAWORD | MD_MARK_EMPH_MOD3_MASK)) {
+ case MD_MARK_EMPH_INTRAWORD | MD_MARK_EMPH_MOD3_0: return &ASTERISK_OPENERS_intraword_mod3_0;
+ case MD_MARK_EMPH_INTRAWORD | MD_MARK_EMPH_MOD3_1: return &ASTERISK_OPENERS_intraword_mod3_1;
+ case MD_MARK_EMPH_INTRAWORD | MD_MARK_EMPH_MOD3_2: return &ASTERISK_OPENERS_intraword_mod3_2;
+ case MD_MARK_EMPH_MOD3_0: return &ASTERISK_OPENERS_extraword_mod3_0;
+ case MD_MARK_EMPH_MOD3_1: return &ASTERISK_OPENERS_extraword_mod3_1;
+ case MD_MARK_EMPH_MOD3_2: return &ASTERISK_OPENERS_extraword_mod3_2;
+ default: MD_UNREACHABLE();
+ }
+ return NULL;
+}
+
+static MD_MARKCHAIN*
+md_mark_chain(MD_CTX* ctx, int mark_index)
+{
+ MD_MARK* mark = &ctx->marks[mark_index];
+
+ switch(mark->ch) {
+ case _T('*'): return md_asterisk_chain(ctx, mark->flags);
+ case _T('_'): return &UNDERSCORE_OPENERS;
+ case _T('~'): return (mark->end - mark->beg == 1) ? &TILDE_OPENERS_1 : &TILDE_OPENERS_2;
+ case _T('['): return &BRACKET_OPENERS;
+ case _T('|'): return &TABLECELLBOUNDARIES;
+ default: return NULL;
+ }
+}
+
+static MD_MARK*
+md_push_mark(MD_CTX* ctx)
+{
+ if(ctx->n_marks >= ctx->alloc_marks) {
+ MD_MARK* new_marks;
+
+ ctx->alloc_marks = (ctx->alloc_marks > 0
+ ? ctx->alloc_marks + ctx->alloc_marks / 2
+ : 64);
+ new_marks = realloc(ctx->marks, ctx->alloc_marks * sizeof(MD_MARK));
+ if(new_marks == NULL) {
+ MD_LOG("realloc() failed.");
+ return NULL;
+ }
+
+ ctx->marks = new_marks;
+ }
+
+ return &ctx->marks[ctx->n_marks++];
+}
+
+#define PUSH_MARK_() \
+ do { \
+ mark = md_push_mark(ctx); \
+ if(mark == NULL) { \
+ ret = -1; \
+ goto abort; \
+ } \
+ } while(0)
+
+#define PUSH_MARK(ch_, beg_, end_, flags_) \
+ do { \
+ PUSH_MARK_(); \
+ mark->beg = (beg_); \
+ mark->end = (end_); \
+ mark->prev = -1; \
+ mark->next = -1; \
+ mark->ch = (char)(ch_); \
+ mark->flags = (flags_); \
+ } while(0)
+
+
+static void
+md_mark_chain_append(MD_CTX* ctx, MD_MARKCHAIN* chain, int mark_index)
+{
+ if(chain->tail >= 0)
+ ctx->marks[chain->tail].next = mark_index;
+ else
+ chain->head = mark_index;
+
+ ctx->marks[mark_index].prev = chain->tail;
+ ctx->marks[mark_index].next = -1;
+ chain->tail = mark_index;
+}
+
+/* Sometimes, we need to store a pointer into the mark. It is quite rare
+ * so we do not bother to make MD_MARK use union, and it can only happen
+ * for dummy marks. */
+static inline void
+md_mark_store_ptr(MD_CTX* ctx, int mark_index, void* ptr)
+{
+ MD_MARK* mark = &ctx->marks[mark_index];
+ MD_ASSERT(mark->ch == 'D');
+
+ /* Check only members beg and end are misused for this. */
+ MD_ASSERT(sizeof(void*) <= 2 * sizeof(OFF));
+ memcpy(mark, &ptr, sizeof(void*));
+}
+
+static inline void*
+md_mark_get_ptr(MD_CTX* ctx, int mark_index)
+{
+ void* ptr;
+ MD_MARK* mark = &ctx->marks[mark_index];
+ MD_ASSERT(mark->ch == 'D');
+ memcpy(&ptr, mark, sizeof(void*));
+ return ptr;
+}
+
+static void
+md_resolve_range(MD_CTX* ctx, MD_MARKCHAIN* chain, int opener_index, int closer_index)
+{
+ MD_MARK* opener = &ctx->marks[opener_index];
+ MD_MARK* closer = &ctx->marks[closer_index];
+
+ /* Remove opener from the list of openers. */
+ if(chain != NULL) {
+ if(opener->prev >= 0)
+ ctx->marks[opener->prev].next = opener->next;
+ else
+ chain->head = opener->next;
+
+ if(opener->next >= 0)
+ ctx->marks[opener->next].prev = opener->prev;
+ else
+ chain->tail = opener->prev;
+ }
+
+ /* Interconnect opener and closer and mark both as resolved. */
+ opener->next = closer_index;
+ opener->flags |= MD_MARK_OPENER | MD_MARK_RESOLVED;
+ closer->prev = opener_index;
+ closer->flags |= MD_MARK_CLOSER | MD_MARK_RESOLVED;
+}
+
+
+#define MD_ROLLBACK_ALL 0
+#define MD_ROLLBACK_CROSSING 1
+
+/* In the range ctx->marks[opener_index] ... [closer_index], undo some or all
+ * resolvings accordingly to these rules:
+ *
+ * (1) All openers BEFORE the range corresponding to any closer inside the
+ * range are un-resolved and they are re-added to their respective chains
+ * of unresolved openers. This ensures we can reuse the opener for closers
+ * AFTER the range.
+ *
+ * (2) If 'how' is MD_ROLLBACK_ALL, then ALL resolved marks inside the range
+ * are discarded.
+ *
+ * (3) If 'how' is MD_ROLLBACK_CROSSING, only closers with openers handled
+ * in (1) are discarded. I.e. pairs of openers and closers which are both
+ * inside the range are retained as well as any unpaired marks.
+ */
+static void
+md_rollback(MD_CTX* ctx, int opener_index, int closer_index, int how)
+{
+ int i;
+ int mark_index;
+
+ /* Cut all unresolved openers at the mark index. */
+ for(i = OPENERS_CHAIN_FIRST; i < OPENERS_CHAIN_LAST+1; i++) {
+ MD_MARKCHAIN* chain = &ctx->mark_chains[i];
+
+ while(chain->tail >= opener_index)
+ chain->tail = ctx->marks[chain->tail].prev;
+
+ if(chain->tail >= 0)
+ ctx->marks[chain->tail].next = -1;
+ else
+ chain->head = -1;
+ }
+
+ /* Go backwards so that unresolved openers are re-added into their
+ * respective chains, in the right order. */
+ mark_index = closer_index - 1;
+ while(mark_index > opener_index) {
+ MD_MARK* mark = &ctx->marks[mark_index];
+ int mark_flags = mark->flags;
+ int discard_flag = (how == MD_ROLLBACK_ALL);
+
+ if(mark->flags & MD_MARK_CLOSER) {
+ int mark_opener_index = mark->prev;
+
+ /* Undo opener BEFORE the range. */
+ if(mark_opener_index < opener_index) {
+ MD_MARK* mark_opener = &ctx->marks[mark_opener_index];
+ MD_MARKCHAIN* chain;
+
+ mark_opener->flags &= ~(MD_MARK_OPENER | MD_MARK_CLOSER | MD_MARK_RESOLVED);
+ chain = md_mark_chain(ctx, opener_index);
+ if(chain != NULL) {
+ md_mark_chain_append(ctx, chain, mark_opener_index);
+ discard_flag = 1;
+ }
+ }
+ }
+
+ /* And reset our flags. */
+ if(discard_flag)
+ mark->flags &= ~(MD_MARK_OPENER | MD_MARK_CLOSER | MD_MARK_RESOLVED);
+
+ /* Jump as far as we can over unresolved or non-interesting marks. */
+ switch(how) {
+ case MD_ROLLBACK_CROSSING:
+ if((mark_flags & MD_MARK_CLOSER) && mark->prev > opener_index) {
+ /* If we are closer with opener INSIDE the range, there may
+ * not be any other crosser inside the subrange. */
+ mark_index = mark->prev;
+ break;
+ }
+ MD_FALLTHROUGH();
+ default:
+ mark_index--;
+ break;
+ }
+ }
+}
+
+static void
+md_build_mark_char_map(MD_CTX* ctx)
+{
+ memset(ctx->mark_char_map, 0, sizeof(ctx->mark_char_map));
+
+ ctx->mark_char_map['\\'] = 1;
+ ctx->mark_char_map['*'] = 1;
+ ctx->mark_char_map['_'] = 1;
+ ctx->mark_char_map['`'] = 1;
+ ctx->mark_char_map['&'] = 1;
+ ctx->mark_char_map[';'] = 1;
+ ctx->mark_char_map['<'] = 1;
+ ctx->mark_char_map['>'] = 1;
+ ctx->mark_char_map['['] = 1;
+ ctx->mark_char_map['!'] = 1;
+ ctx->mark_char_map[']'] = 1;
+ ctx->mark_char_map['\0'] = 1;
+
+ if(ctx->parser.flags & MD_FLAG_STRIKETHROUGH)
+ ctx->mark_char_map['~'] = 1;
+
+ if(ctx->parser.flags & MD_FLAG_LATEXMATHSPANS)
+ ctx->mark_char_map['$'] = 1;
+
+ if(ctx->parser.flags & MD_FLAG_PERMISSIVEEMAILAUTOLINKS)
+ ctx->mark_char_map['@'] = 1;
+
+ if(ctx->parser.flags & MD_FLAG_PERMISSIVEURLAUTOLINKS)
+ ctx->mark_char_map[':'] = 1;
+
+ if(ctx->parser.flags & MD_FLAG_PERMISSIVEWWWAUTOLINKS)
+ ctx->mark_char_map['.'] = 1;
+
+ if((ctx->parser.flags & MD_FLAG_TABLES) || (ctx->parser.flags & MD_FLAG_WIKILINKS))
+ ctx->mark_char_map['|'] = 1;
+
+ if(ctx->parser.flags & MD_FLAG_COLLAPSEWHITESPACE) {
+ int i;
+
+ for(i = 0; i < (int) sizeof(ctx->mark_char_map); i++) {
+ if(ISWHITESPACE_(i))
+ ctx->mark_char_map[i] = 1;
+ }
+ }
+}
+
+/* We limit code span marks to lower than 32 backticks. This solves the
+ * pathologic case of too many openers, each of different length: Their
+ * resolving would be then O(n^2). */
+#define CODESPAN_MARK_MAXLEN 32
+
+static int
+md_is_code_span(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg,
+ OFF* p_opener_beg, OFF* p_opener_end,
+ OFF* p_closer_beg, OFF* p_closer_end,
+ OFF last_potential_closers[CODESPAN_MARK_MAXLEN],
+ int* p_reached_paragraph_end)
+{
+ OFF opener_beg = beg;
+ OFF opener_end;
+ OFF closer_beg;
+ OFF closer_end;
+ SZ mark_len;
+ OFF line_end;
+ int has_space_after_opener = FALSE;
+ int has_eol_after_opener = FALSE;
+ int has_space_before_closer = FALSE;
+ int has_eol_before_closer = FALSE;
+ int has_only_space = TRUE;
+ int line_index = 0;
+
+ line_end = lines[0].end;
+ opener_end = opener_beg;
+ while(opener_end < line_end && CH(opener_end) == _T('`'))
+ opener_end++;
+ has_space_after_opener = (opener_end < line_end && CH(opener_end) == _T(' '));
+ has_eol_after_opener = (opener_end == line_end);
+
+ /* The caller needs to know end of the opening mark even if we fail. */
+ *p_opener_end = opener_end;
+
+ mark_len = opener_end - opener_beg;
+ if(mark_len > CODESPAN_MARK_MAXLEN)
+ return FALSE;
+
+ /* Check whether we already know there is no closer of this length.
+ * If so, re-scan does no sense. This fixes issue #59. */
+ if(last_potential_closers[mark_len-1] >= lines[n_lines-1].end ||
+ (*p_reached_paragraph_end && last_potential_closers[mark_len-1] < opener_end))
+ return FALSE;
+
+ closer_beg = opener_end;
+ closer_end = opener_end;
+
+ /* Find closer mark. */
+ while(TRUE) {
+ while(closer_beg < line_end && CH(closer_beg) != _T('`')) {
+ if(CH(closer_beg) != _T(' '))
+ has_only_space = FALSE;
+ closer_beg++;
+ }
+ closer_end = closer_beg;
+ while(closer_end < line_end && CH(closer_end) == _T('`'))
+ closer_end++;
+
+ if(closer_end - closer_beg == mark_len) {
+ /* Success. */
+ has_space_before_closer = (closer_beg > lines[line_index].beg && CH(closer_beg-1) == _T(' '));
+ has_eol_before_closer = (closer_beg == lines[line_index].beg);
+ break;
+ }
+
+ if(closer_end - closer_beg > 0) {
+ /* We have found a back-tick which is not part of the closer. */
+ has_only_space = FALSE;
+
+ /* But if we eventually fail, remember it as a potential closer
+ * of its own length for future attempts. This mitigates needs for
+ * rescans. */
+ if(closer_end - closer_beg < CODESPAN_MARK_MAXLEN) {
+ if(closer_beg > last_potential_closers[closer_end - closer_beg - 1])
+ last_potential_closers[closer_end - closer_beg - 1] = closer_beg;
+ }
+ }
+
+ if(closer_end >= line_end) {
+ line_index++;
+ if(line_index >= n_lines) {
+ /* Reached end of the paragraph and still nothing. */
+ *p_reached_paragraph_end = TRUE;
+ return FALSE;
+ }
+ /* Try on the next line. */
+ line_end = lines[line_index].end;
+ closer_beg = lines[line_index].beg;
+ } else {
+ closer_beg = closer_end;
+ }
+ }
+
+ /* If there is a space or a new line both after and before the opener
+ * (and if the code span is not made of spaces only), consume one initial
+ * and one trailing space as part of the marks. */
+ if(!has_only_space &&
+ (has_space_after_opener || has_eol_after_opener) &&
+ (has_space_before_closer || has_eol_before_closer))
+ {
+ if(has_space_after_opener)
+ opener_end++;
+ else
+ opener_end = lines[1].beg;
+
+ if(has_space_before_closer)
+ closer_beg--;
+ else {
+ closer_beg = lines[line_index-1].end;
+ /* We need to eat the preceding "\r\n" but not any line trailing
+ * spaces. */
+ while(closer_beg < ctx->size && ISBLANK(closer_beg))
+ closer_beg++;
+ }
+ }
+
+ *p_opener_beg = opener_beg;
+ *p_opener_end = opener_end;
+ *p_closer_beg = closer_beg;
+ *p_closer_end = closer_end;
+ return TRUE;
+}
+
+static int
+md_is_autolink_uri(MD_CTX* ctx, OFF beg, OFF max_end, OFF* p_end)
+{
+ OFF off = beg+1;
+
+ MD_ASSERT(CH(beg) == _T('<'));
+
+ /* Check for scheme. */
+ if(off >= max_end || !ISASCII(off))
+ return FALSE;
+ off++;
+ while(1) {
+ if(off >= max_end)
+ return FALSE;
+ if(off - beg > 32)
+ return FALSE;
+ if(CH(off) == _T(':') && off - beg >= 3)
+ break;
+ if(!ISALNUM(off) && CH(off) != _T('+') && CH(off) != _T('-') && CH(off) != _T('.'))
+ return FALSE;
+ off++;
+ }
+
+ /* Check the path after the scheme. */
+ while(off < max_end && CH(off) != _T('>')) {
+ if(ISWHITESPACE(off) || ISCNTRL(off) || CH(off) == _T('<'))
+ return FALSE;
+ off++;
+ }
+
+ if(off >= max_end)
+ return FALSE;
+
+ MD_ASSERT(CH(off) == _T('>'));
+ *p_end = off+1;
+ return TRUE;
+}
+
+static int
+md_is_autolink_email(MD_CTX* ctx, OFF beg, OFF max_end, OFF* p_end)
+{
+ OFF off = beg + 1;
+ int label_len;
+
+ MD_ASSERT(CH(beg) == _T('<'));
+
+ /* The code should correspond to this regexp:
+ /^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+
+ @[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?
+ (?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/
+ */
+
+ /* Username (before '@'). */
+ while(off < max_end && (ISALNUM(off) || ISANYOF(off, _T(".!#$%&'*+/=?^_`{|}~-"))))
+ off++;
+ if(off <= beg+1)
+ return FALSE;
+
+ /* '@' */
+ if(off >= max_end || CH(off) != _T('@'))
+ return FALSE;
+ off++;
+
+ /* Labels delimited with '.'; each label is sequence of 1 - 63 alnum
+ * characters or '-', but '-' is not allowed as first or last char. */
+ label_len = 0;
+ while(off < max_end) {
+ if(ISALNUM(off))
+ label_len++;
+ else if(CH(off) == _T('-') && label_len > 0)
+ label_len++;
+ else if(CH(off) == _T('.') && label_len > 0 && CH(off-1) != _T('-'))
+ label_len = 0;
+ else
+ break;
+
+ if(label_len > 63)
+ return FALSE;
+
+ off++;
+ }
+
+ if(label_len <= 0 || off >= max_end || CH(off) != _T('>') || CH(off-1) == _T('-'))
+ return FALSE;
+
+ *p_end = off+1;
+ return TRUE;
+}
+
+static int
+md_is_autolink(MD_CTX* ctx, OFF beg, OFF max_end, OFF* p_end, int* p_missing_mailto)
+{
+ if(md_is_autolink_uri(ctx, beg, max_end, p_end)) {
+ *p_missing_mailto = FALSE;
+ return TRUE;
+ }
+
+ if(md_is_autolink_email(ctx, beg, max_end, p_end)) {
+ *p_missing_mailto = TRUE;
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static int
+md_collect_marks(MD_CTX* ctx, const MD_LINE* lines, int n_lines, int table_mode)
+{
+ int i;
+ int ret = 0;
+ MD_MARK* mark;
+ OFF codespan_last_potential_closers[CODESPAN_MARK_MAXLEN] = { 0 };
+ int codespan_scanned_till_paragraph_end = FALSE;
+
+ for(i = 0; i < n_lines; i++) {
+ const MD_LINE* line = &lines[i];
+ OFF off = line->beg;
+ OFF line_end = line->end;
+
+ while(TRUE) {
+ CHAR ch;
+
+#ifdef MD4C_USE_UTF16
+ /* For UTF-16, mark_char_map[] covers only ASCII. */
+ #define IS_MARK_CHAR(off) ((CH(off) < SIZEOF_ARRAY(ctx->mark_char_map)) && \
+ (ctx->mark_char_map[(unsigned char) CH(off)]))
+#else
+ /* For 8-bit encodings, mark_char_map[] covers all 256 elements. */
+ #define IS_MARK_CHAR(off) (ctx->mark_char_map[(unsigned char) CH(off)])
+#endif
+
+ /* Optimization: Use some loop unrolling. */
+ while(off + 3 < line_end && !IS_MARK_CHAR(off+0) && !IS_MARK_CHAR(off+1)
+ && !IS_MARK_CHAR(off+2) && !IS_MARK_CHAR(off+3))
+ off += 4;
+ while(off < line_end && !IS_MARK_CHAR(off+0))
+ off++;
+
+ if(off >= line_end)
+ break;
+
+ ch = CH(off);
+
+ /* A backslash escape.
+ * It can go beyond line->end as it may involve escaped new
+ * line to form a hard break. */
+ if(ch == _T('\\') && off+1 < ctx->size && (ISPUNCT(off+1) || ISNEWLINE(off+1))) {
+ /* Hard-break cannot be on the last line of the block. */
+ if(!ISNEWLINE(off+1) || i+1 < n_lines)
+ PUSH_MARK(ch, off, off+2, MD_MARK_RESOLVED);
+ off += 2;
+ continue;
+ }
+
+ /* A potential (string) emphasis start/end. */
+ if(ch == _T('*') || ch == _T('_')) {
+ OFF tmp = off+1;
+ int left_level; /* What precedes: 0 = whitespace; 1 = punctuation; 2 = other char. */
+ int right_level; /* What follows: 0 = whitespace; 1 = punctuation; 2 = other char. */
+
+ while(tmp < line_end && CH(tmp) == ch)
+ tmp++;
+
+ if(off == line->beg || ISUNICODEWHITESPACEBEFORE(off))
+ left_level = 0;
+ else if(ISUNICODEPUNCTBEFORE(off))
+ left_level = 1;
+ else
+ left_level = 2;
+
+ if(tmp == line_end || ISUNICODEWHITESPACE(tmp))
+ right_level = 0;
+ else if(ISUNICODEPUNCT(tmp))
+ right_level = 1;
+ else
+ right_level = 2;
+
+ /* Intra-word underscore doesn't have special meaning. */
+ if(ch == _T('_') && left_level == 2 && right_level == 2) {
+ left_level = 0;
+ right_level = 0;
+ }
+
+ if(left_level != 0 || right_level != 0) {
+ unsigned flags = 0;
+
+ if(left_level > 0 && left_level >= right_level)
+ flags |= MD_MARK_POTENTIAL_CLOSER;
+ if(right_level > 0 && right_level >= left_level)
+ flags |= MD_MARK_POTENTIAL_OPENER;
+ if(left_level == 2 && right_level == 2)
+ flags |= MD_MARK_EMPH_INTRAWORD;
+
+ /* For "the rule of three" we need to remember the original
+ * size of the mark (modulo three), before we potentially
+ * split the mark when being later resolved partially by some
+ * shorter closer. */
+ switch((tmp - off) % 3) {
+ case 0: flags |= MD_MARK_EMPH_MOD3_0; break;
+ case 1: flags |= MD_MARK_EMPH_MOD3_1; break;
+ case 2: flags |= MD_MARK_EMPH_MOD3_2; break;
+ }
+
+ PUSH_MARK(ch, off, tmp, flags);
+
+ /* During resolving, multiple asterisks may have to be
+ * split into independent span start/ends. Consider e.g.
+ * "**foo* bar*". Therefore we push also some empty dummy
+ * marks to have enough space for that. */
+ off++;
+ while(off < tmp) {
+ PUSH_MARK('D', off, off, 0);
+ off++;
+ }
+ continue;
+ }
+
+ off = tmp;
+ continue;
+ }
+
+ /* A potential code span start/end. */
+ if(ch == _T('`')) {
+ OFF opener_beg, opener_end;
+ OFF closer_beg, closer_end;
+ int is_code_span;
+
+ is_code_span = md_is_code_span(ctx, lines + i, n_lines - i, off,
+ &opener_beg, &opener_end, &closer_beg, &closer_end,
+ codespan_last_potential_closers,
+ &codespan_scanned_till_paragraph_end);
+ if(is_code_span) {
+ PUSH_MARK(_T('`'), opener_beg, opener_end, MD_MARK_OPENER | MD_MARK_RESOLVED);
+ PUSH_MARK(_T('`'), closer_beg, closer_end, MD_MARK_CLOSER | MD_MARK_RESOLVED);
+ ctx->marks[ctx->n_marks-2].next = ctx->n_marks-1;
+ ctx->marks[ctx->n_marks-1].prev = ctx->n_marks-2;
+
+ off = closer_end;
+
+ /* Advance the current line accordingly. */
+ while(off > line_end) {
+ i++;
+ line++;
+ line_end = line->end;
+ }
+ continue;
+ }
+
+ off = opener_end;
+ continue;
+ }
+
+ /* A potential entity start. */
+ if(ch == _T('&')) {
+ PUSH_MARK(ch, off, off+1, MD_MARK_POTENTIAL_OPENER);
+ off++;
+ continue;
+ }
+
+ /* A potential entity end. */
+ if(ch == _T(';')) {
+ /* We surely cannot be entity unless the previous mark is '&'. */
+ if(ctx->n_marks > 0 && ctx->marks[ctx->n_marks-1].ch == _T('&'))
+ PUSH_MARK(ch, off, off+1, MD_MARK_POTENTIAL_CLOSER);
+
+ off++;
+ continue;
+ }
+
+ /* A potential autolink or raw HTML start/end. */
+ if(ch == _T('<')) {
+ int is_autolink;
+ OFF autolink_end;
+ int missing_mailto;
+
+ if(!(ctx->parser.flags & MD_FLAG_NOHTMLSPANS)) {
+ int is_html;
+ OFF html_end;
+
+ /* Given the nature of the raw HTML, we have to recognize
+ * it here. Doing so later in md_analyze_lt_gt() could
+ * open can of worms of quadratic complexity. */
+ is_html = md_is_html_any(ctx, lines + i, n_lines - i, off,
+ lines[n_lines-1].end, &html_end);
+ if(is_html) {
+ PUSH_MARK(_T('<'), off, off, MD_MARK_OPENER | MD_MARK_RESOLVED);
+ PUSH_MARK(_T('>'), html_end, html_end, MD_MARK_CLOSER | MD_MARK_RESOLVED);
+ ctx->marks[ctx->n_marks-2].next = ctx->n_marks-1;
+ ctx->marks[ctx->n_marks-1].prev = ctx->n_marks-2;
+ off = html_end;
+
+ /* Advance the current line accordingly. */
+ while(off > line_end) {
+ i++;
+ line++;
+ line_end = line->end;
+ }
+ continue;
+ }
+ }
+
+ is_autolink = md_is_autolink(ctx, off, lines[n_lines-1].end,
+ &autolink_end, &missing_mailto);
+ if(is_autolink) {
+ PUSH_MARK((missing_mailto ? _T('@') : _T('<')), off, off+1,
+ MD_MARK_OPENER | MD_MARK_RESOLVED | MD_MARK_AUTOLINK);
+ PUSH_MARK(_T('>'), autolink_end-1, autolink_end,
+ MD_MARK_CLOSER | MD_MARK_RESOLVED | MD_MARK_AUTOLINK);
+ ctx->marks[ctx->n_marks-2].next = ctx->n_marks-1;
+ ctx->marks[ctx->n_marks-1].prev = ctx->n_marks-2;
+ off = autolink_end;
+ continue;
+ }
+
+ off++;
+ continue;
+ }
+
+ /* A potential link or its part. */
+ if(ch == _T('[') || (ch == _T('!') && off+1 < line_end && CH(off+1) == _T('['))) {
+ OFF tmp = (ch == _T('[') ? off+1 : off+2);
+ PUSH_MARK(ch, off, tmp, MD_MARK_POTENTIAL_OPENER);
+ off = tmp;
+ /* Two dummies to make enough place for data we need if it is
+ * a link. */
+ PUSH_MARK('D', off, off, 0);
+ PUSH_MARK('D', off, off, 0);
+ continue;
+ }
+ if(ch == _T(']')) {
+ PUSH_MARK(ch, off, off+1, MD_MARK_POTENTIAL_CLOSER);
+ off++;
+ continue;
+ }
+
+ /* A potential permissive e-mail autolink. */
+ if(ch == _T('@')) {
+ if(line->beg + 1 <= off && ISALNUM(off-1) &&
+ off + 3 < line->end && ISALNUM(off+1))
+ {
+ PUSH_MARK(ch, off, off+1, MD_MARK_POTENTIAL_OPENER);
+ /* Push a dummy as a reserve for a closer. */
+ PUSH_MARK('D', off, off, 0);
+ }
+
+ off++;
+ continue;
+ }
+
+ /* A potential permissive URL autolink. */
+ if(ch == _T(':')) {
+ static struct {
+ const CHAR* scheme;
+ SZ scheme_size;
+ const CHAR* suffix;
+ SZ suffix_size;
+ } scheme_map[] = {
+ /* In the order from the most frequently used, arguably. */
+ { _T("http"), 4, _T("//"), 2 },
+ { _T("https"), 5, _T("//"), 2 },
+ { _T("ftp"), 3, _T("//"), 2 }
+ };
+ int scheme_index;
+
+ for(scheme_index = 0; scheme_index < (int) SIZEOF_ARRAY(scheme_map); scheme_index++) {
+ const CHAR* scheme = scheme_map[scheme_index].scheme;
+ const SZ scheme_size = scheme_map[scheme_index].scheme_size;
+ const CHAR* suffix = scheme_map[scheme_index].suffix;
+ const SZ suffix_size = scheme_map[scheme_index].suffix_size;
+
+ if(line->beg + scheme_size <= off && md_ascii_eq(STR(off-scheme_size), scheme, scheme_size) &&
+ (line->beg + scheme_size == off || ISWHITESPACE(off-scheme_size-1) || ISANYOF(off-scheme_size-1, _T("*_~(["))) &&
+ off + 1 + suffix_size < line->end && md_ascii_eq(STR(off+1), suffix, suffix_size))
+ {
+ PUSH_MARK(ch, off-scheme_size, off+1+suffix_size, MD_MARK_POTENTIAL_OPENER);
+ /* Push a dummy as a reserve for a closer. */
+ PUSH_MARK('D', off, off, 0);
+ off += 1 + suffix_size;
+ break;
+ }
+ }
+
+ off++;
+ continue;
+ }
+
+ /* A potential permissive WWW autolink. */
+ if(ch == _T('.')) {
+ if(line->beg + 3 <= off && md_ascii_eq(STR(off-3), _T("www"), 3) &&
+ (line->beg + 3 == off || ISWHITESPACE(off-4) || ISANYOF(off-4, _T("*_~(["))) &&
+ off + 1 < line_end)
+ {
+ PUSH_MARK(ch, off-3, off+1, MD_MARK_POTENTIAL_OPENER);
+ /* Push a dummy as a reserve for a closer. */
+ PUSH_MARK('D', off, off, 0);
+ off++;
+ continue;
+ }
+
+ off++;
+ continue;
+ }
+
+ /* A potential table cell boundary or wiki link label delimiter. */
+ if((table_mode || ctx->parser.flags & MD_FLAG_WIKILINKS) && ch == _T('|')) {
+ PUSH_MARK(ch, off, off+1, 0);
+ off++;
+ continue;
+ }
+
+ /* A potential strikethrough start/end. */
+ if(ch == _T('~')) {
+ OFF tmp = off+1;
+
+ while(tmp < line_end && CH(tmp) == _T('~'))
+ tmp++;
+
+ if(tmp - off < 3) {
+ unsigned flags = 0;
+
+ if(tmp < line_end && !ISUNICODEWHITESPACE(tmp))
+ flags |= MD_MARK_POTENTIAL_OPENER;
+ if(off > line->beg && !ISUNICODEWHITESPACEBEFORE(off))
+ flags |= MD_MARK_POTENTIAL_CLOSER;
+ if(flags != 0)
+ PUSH_MARK(ch, off, tmp, flags);
+ }
+
+ off = tmp;
+ continue;
+ }
+
+ /* A potential equation start/end */
+ if(ch == _T('$')) {
+ /* We can have at most two consecutive $ signs,
+ * where two dollar signs signify a display equation. */
+ OFF tmp = off+1;
+
+ while(tmp < line_end && CH(tmp) == _T('$'))
+ tmp++;
+
+ if (tmp - off <= 2)
+ PUSH_MARK(ch, off, tmp, MD_MARK_POTENTIAL_OPENER | MD_MARK_POTENTIAL_CLOSER);
+ off = tmp;
+ continue;
+ }
+
+ /* Turn non-trivial whitespace into single space. */
+ if(ISWHITESPACE_(ch)) {
+ OFF tmp = off+1;
+
+ while(tmp < line_end && ISWHITESPACE(tmp))
+ tmp++;
+
+ if(tmp - off > 1 || ch != _T(' '))
+ PUSH_MARK(ch, off, tmp, MD_MARK_RESOLVED);
+
+ off = tmp;
+ continue;
+ }
+
+ /* NULL character. */
+ if(ch == _T('\0')) {
+ PUSH_MARK(ch, off, off+1, MD_MARK_RESOLVED);
+ off++;
+ continue;
+ }
+
+ off++;
+ }
+ }
+
+ /* Add a dummy mark at the end of the mark vector to simplify
+ * process_inlines(). */
+ PUSH_MARK(127, ctx->size, ctx->size, MD_MARK_RESOLVED);
+
+abort:
+ return ret;
+}
+
+static void
+md_analyze_bracket(MD_CTX* ctx, int mark_index)
+{
+ /* We cannot really resolve links here as for that we would need
+ * more context. E.g. a following pair of brackets (reference link),
+ * or enclosing pair of brackets (if the inner is the link, the outer
+ * one cannot be.)
+ *
+ * Therefore we here only construct a list of resolved '[' ']' pairs
+ * ordered by position of the closer. This allows ur to analyze what is
+ * or is not link in the right order, from inside to outside in case
+ * of nested brackets.
+ *
+ * The resolving itself is deferred into md_resolve_links().
+ */
+
+ MD_MARK* mark = &ctx->marks[mark_index];
+
+ if(mark->flags & MD_MARK_POTENTIAL_OPENER) {
+ md_mark_chain_append(ctx, &BRACKET_OPENERS, mark_index);
+ return;
+ }
+
+ if(BRACKET_OPENERS.tail >= 0) {
+ /* Pop the opener from the chain. */
+ int opener_index = BRACKET_OPENERS.tail;
+ MD_MARK* opener = &ctx->marks[opener_index];
+ if(opener->prev >= 0)
+ ctx->marks[opener->prev].next = -1;
+ else
+ BRACKET_OPENERS.head = -1;
+ BRACKET_OPENERS.tail = opener->prev;
+
+ /* Interconnect the opener and closer. */
+ opener->next = mark_index;
+ mark->prev = opener_index;
+
+ /* Add the pair into chain of potential links for md_resolve_links().
+ * Note we misuse opener->prev for this as opener->next points to its
+ * closer. */
+ if(ctx->unresolved_link_tail >= 0)
+ ctx->marks[ctx->unresolved_link_tail].prev = opener_index;
+ else
+ ctx->unresolved_link_head = opener_index;
+ ctx->unresolved_link_tail = opener_index;
+ opener->prev = -1;
+ }
+}
+
+/* Forward declaration. */
+static void md_analyze_link_contents(MD_CTX* ctx, const MD_LINE* lines, int n_lines,
+ int mark_beg, int mark_end);
+
+static int
+md_resolve_links(MD_CTX* ctx, const MD_LINE* lines, int n_lines)
+{
+ int opener_index = ctx->unresolved_link_head;
+ OFF last_link_beg = 0;
+ OFF last_link_end = 0;
+ OFF last_img_beg = 0;
+ OFF last_img_end = 0;
+
+ while(opener_index >= 0) {
+ MD_MARK* opener = &ctx->marks[opener_index];
+ int closer_index = opener->next;
+ MD_MARK* closer = &ctx->marks[closer_index];
+ int next_index = opener->prev;
+ MD_MARK* next_opener;
+ MD_MARK* next_closer;
+ MD_LINK_ATTR attr;
+ int is_link = FALSE;
+
+ if(next_index >= 0) {
+ next_opener = &ctx->marks[next_index];
+ next_closer = &ctx->marks[next_opener->next];
+ } else {
+ next_opener = NULL;
+ next_closer = NULL;
+ }
+
+ /* If nested ("[ [ ] ]"), we need to make sure that:
+ * - The outer does not end inside of (...) belonging to the inner.
+ * - The outer cannot be link if the inner is link (i.e. not image).
+ *
+ * (Note we here analyze from inner to outer as the marks are ordered
+ * by closer->beg.)
+ */
+ if((opener->beg < last_link_beg && closer->end < last_link_end) ||
+ (opener->beg < last_img_beg && closer->end < last_img_end) ||
+ (opener->beg < last_link_end && opener->ch == '['))
+ {
+ opener_index = next_index;
+ continue;
+ }
+
+ /* Recognize and resolve wiki links.
+ * Wiki-links maybe '[[destination]]' or '[[destination|label]]'.
+ */
+ if ((ctx->parser.flags & MD_FLAG_WIKILINKS) &&
+ (opener->end - opener->beg == 1) && /* not image */
+ next_opener != NULL && /* double '[' opener */
+ next_opener->ch == '[' &&
+ (next_opener->beg == opener->beg - 1) &&
+ (next_opener->end - next_opener->beg == 1) &&
+ next_closer != NULL && /* double ']' closer */
+ next_closer->ch == ']' &&
+ (next_closer->beg == closer->beg + 1) &&
+ (next_closer->end - next_closer->beg == 1))
+ {
+ MD_MARK* delim = NULL;
+ int delim_index;
+ OFF dest_beg, dest_end;
+
+ is_link = TRUE;
+
+ /* We don't allow destination to be longer than 100 characters.
+ * Lets scan to see whether there is '|'. (If not then the whole
+ * wiki-link has to be below the 100 characters.) */
+ delim_index = opener_index + 1;
+ while(delim_index < closer_index) {
+ MD_MARK* m = &ctx->marks[delim_index];
+ if(m->ch == '|') {
+ delim = m;
+ break;
+ }
+ if(m->ch != 'D' && m->beg - opener->end > 100)
+ break;
+ delim_index++;
+ }
+ dest_beg = opener->end;
+ dest_end = (delim != NULL) ? delim->beg : closer->beg;
+ if(dest_end - dest_beg == 0 || dest_end - dest_beg > 100)
+ is_link = FALSE;
+
+ /* There may not be any new line in the destination. */
+ if(is_link) {
+ OFF off;
+ for(off = dest_beg; off < dest_end; off++) {
+ if(ISNEWLINE(off)) {
+ is_link = FALSE;
+ break;
+ }
+ }
+ }
+
+ if(is_link) {
+ if(delim != NULL) {
+ if(delim->end < closer->beg) {
+ opener->end = delim->beg;
+ } else {
+ /* The pipe is just before the closer: [[foo|]] */
+ closer->beg = delim->beg;
+ delim = NULL;
+ }
+ }
+
+ opener->beg = next_opener->beg;
+ opener->next = closer_index;
+ opener->flags |= MD_MARK_OPENER | MD_MARK_RESOLVED;
+
+ closer->end = next_closer->end;
+ closer->prev = opener_index;
+ closer->flags |= MD_MARK_CLOSER | MD_MARK_RESOLVED;
+
+ last_link_beg = opener->beg;
+ last_link_end = closer->end;
+
+ if(delim != NULL) {
+ delim->flags |= MD_MARK_RESOLVED;
+ md_rollback(ctx, opener_index, delim_index, MD_ROLLBACK_ALL);
+ md_analyze_link_contents(ctx, lines, n_lines, opener_index+1, closer_index);
+ } else {
+ md_rollback(ctx, opener_index, closer_index, MD_ROLLBACK_ALL);
+ }
+
+ opener_index = next_opener->prev;
+ continue;
+ }
+ }
+
+ if(next_opener != NULL && next_opener->beg == closer->end) {
+ if(next_closer->beg > closer->end + 1) {
+ /* Might be full reference link. */
+ is_link = md_is_link_reference(ctx, lines, n_lines, next_opener->beg, next_closer->end, &attr);
+ } else {
+ /* Might be shortcut reference link. */
+ is_link = md_is_link_reference(ctx, lines, n_lines, opener->beg, closer->end, &attr);
+ }
+
+ if(is_link < 0)
+ return -1;
+
+ if(is_link) {
+ /* Eat the 2nd "[...]". */
+ closer->end = next_closer->end;
+
+ /* Do not analyze the label as a standalone link in the next
+ * iteration. */
+ next_index = ctx->marks[next_index].prev;
+ }
+ } else {
+ if(closer->end < ctx->size && CH(closer->end) == _T('(')) {
+ /* Might be inline link. */
+ OFF inline_link_end = UINT_MAX;
+
+ is_link = md_is_inline_link_spec(ctx, lines, n_lines, closer->end, &inline_link_end, &attr);
+ if(is_link < 0)
+ return -1;
+
+ /* Check the closing ')' is not inside an already resolved range
+ * (i.e. a range with a higher priority), e.g. a code span. */
+ if(is_link) {
+ int i = closer_index + 1;
+
+ while(i < ctx->n_marks) {
+ MD_MARK* mark = &ctx->marks[i];
+
+ if(mark->beg >= inline_link_end)
+ break;
+ if((mark->flags & (MD_MARK_OPENER | MD_MARK_RESOLVED)) == (MD_MARK_OPENER | MD_MARK_RESOLVED)) {
+ if(ctx->marks[mark->next].beg >= inline_link_end) {
+ /* Cancel the link status. */
+ if(attr.title_needs_free)
+ free(attr.title);
+ is_link = FALSE;
+ break;
+ }
+
+ i = mark->next + 1;
+ } else {
+ i++;
+ }
+ }
+ }
+
+ if(is_link) {
+ /* Eat the "(...)" */
+ closer->end = inline_link_end;
+ }
+ }
+
+ if(!is_link) {
+ /* Might be collapsed reference link. */
+ is_link = md_is_link_reference(ctx, lines, n_lines, opener->beg, closer->end, &attr);
+ if(is_link < 0)
+ return -1;
+ }
+ }
+
+ if(is_link) {
+ /* Resolve the brackets as a link. */
+ opener->flags |= MD_MARK_OPENER | MD_MARK_RESOLVED;
+ closer->flags |= MD_MARK_CLOSER | MD_MARK_RESOLVED;
+
+ /* If it is a link, we store the destination and title in the two
+ * dummy marks after the opener. */
+ MD_ASSERT(ctx->marks[opener_index+1].ch == 'D');
+ ctx->marks[opener_index+1].beg = attr.dest_beg;
+ ctx->marks[opener_index+1].end = attr.dest_end;
+
+ MD_ASSERT(ctx->marks[opener_index+2].ch == 'D');
+ md_mark_store_ptr(ctx, opener_index+2, attr.title);
+ /* The title might or might not have been allocated for us. */
+ if(attr.title_needs_free)
+ md_mark_chain_append(ctx, &PTR_CHAIN, opener_index+2);
+ ctx->marks[opener_index+2].prev = attr.title_size;
+
+ if(opener->ch == '[') {
+ last_link_beg = opener->beg;
+ last_link_end = closer->end;
+ } else {
+ last_img_beg = opener->beg;
+ last_img_end = closer->end;
+ }
+
+ md_analyze_link_contents(ctx, lines, n_lines, opener_index+1, closer_index);
+
+ /* If the link text is formed by nothing but permissive autolink,
+ * suppress the autolink.
+ * See https://github.com/mity/md4c/issues/152 for more info. */
+ if(ctx->parser.flags & MD_FLAG_PERMISSIVEAUTOLINKS) {
+ MD_MARK* first_nested;
+ MD_MARK* last_nested;
+
+ first_nested = opener + 1;
+ while(first_nested->ch == _T('D') && first_nested < closer)
+ first_nested++;
+
+ last_nested = closer - 1;
+ while(first_nested->ch == _T('D') && last_nested > opener)
+ last_nested--;
+
+ if((first_nested->flags & MD_MARK_RESOLVED) &&
+ first_nested->beg == opener->end &&
+ ISANYOF_(first_nested->ch, _T("@:.")) &&
+ first_nested->next == (last_nested - ctx->marks) &&
+ last_nested->end == closer->beg)
+ {
+ first_nested->ch = _T('D');
+ first_nested->flags &= ~MD_MARK_RESOLVED;
+ last_nested->ch = _T('D');
+ last_nested->flags &= ~MD_MARK_RESOLVED;
+ }
+ }
+ }
+
+ opener_index = next_index;
+ }
+
+ return 0;
+}
+
+/* Analyze whether the mark '&' starts a HTML entity.
+ * If so, update its flags as well as flags of corresponding closer ';'. */
+static void
+md_analyze_entity(MD_CTX* ctx, int mark_index)
+{
+ MD_MARK* opener = &ctx->marks[mark_index];
+ MD_MARK* closer;
+ OFF off;
+
+ /* Cannot be entity if there is no closer as the next mark.
+ * (Any other mark between would mean strange character which cannot be
+ * part of the entity.
+ *
+ * So we can do all the work on '&' and do not call this later for the
+ * closing mark ';'.
+ */
+ if(mark_index + 1 >= ctx->n_marks)
+ return;
+ closer = &ctx->marks[mark_index+1];
+ if(closer->ch != ';')
+ return;
+
+ if(md_is_entity(ctx, opener->beg, closer->end, &off)) {
+ MD_ASSERT(off == closer->end);
+
+ md_resolve_range(ctx, NULL, mark_index, mark_index+1);
+ opener->end = closer->end;
+ }
+}
+
+static void
+md_analyze_table_cell_boundary(MD_CTX* ctx, int mark_index)
+{
+ MD_MARK* mark = &ctx->marks[mark_index];
+ mark->flags |= MD_MARK_RESOLVED;
+
+ md_mark_chain_append(ctx, &TABLECELLBOUNDARIES, mark_index);
+ ctx->n_table_cell_boundaries++;
+}
+
+/* Split a longer mark into two. The new mark takes the given count of
+ * characters. May only be called if an adequate number of dummy 'D' marks
+ * follows.
+ */
+static int
+md_split_emph_mark(MD_CTX* ctx, int mark_index, SZ n)
+{
+ MD_MARK* mark = &ctx->marks[mark_index];
+ int new_mark_index = mark_index + (mark->end - mark->beg - n);
+ MD_MARK* dummy = &ctx->marks[new_mark_index];
+
+ MD_ASSERT(mark->end - mark->beg > n);
+ MD_ASSERT(dummy->ch == 'D');
+
+ memcpy(dummy, mark, sizeof(MD_MARK));
+ mark->end -= n;
+ dummy->beg = mark->end;
+
+ return new_mark_index;
+}
+
+static void
+md_analyze_emph(MD_CTX* ctx, int mark_index)
+{
+ MD_MARK* mark = &ctx->marks[mark_index];
+ MD_MARKCHAIN* chain = md_mark_chain(ctx, mark_index);
+
+ /* If we can be a closer, try to resolve with the preceding opener. */
+ if(mark->flags & MD_MARK_POTENTIAL_CLOSER) {
+ MD_MARK* opener = NULL;
+ int opener_index = 0;
+
+ if(mark->ch == _T('*')) {
+ MD_MARKCHAIN* opener_chains[6];
+ int i, n_opener_chains;
+ unsigned flags = mark->flags;
+
+ /* Apply the "rule of three". */
+ n_opener_chains = 0;
+ opener_chains[n_opener_chains++] = &ASTERISK_OPENERS_intraword_mod3_0;
+ if((flags & MD_MARK_EMPH_MOD3_MASK) != MD_MARK_EMPH_MOD3_2)
+ opener_chains[n_opener_chains++] = &ASTERISK_OPENERS_intraword_mod3_1;
+ if((flags & MD_MARK_EMPH_MOD3_MASK) != MD_MARK_EMPH_MOD3_1)
+ opener_chains[n_opener_chains++] = &ASTERISK_OPENERS_intraword_mod3_2;
+ opener_chains[n_opener_chains++] = &ASTERISK_OPENERS_extraword_mod3_0;
+ if(!(flags & MD_MARK_EMPH_INTRAWORD) || (flags & MD_MARK_EMPH_MOD3_MASK) != MD_MARK_EMPH_MOD3_2)
+ opener_chains[n_opener_chains++] = &ASTERISK_OPENERS_extraword_mod3_1;
+ if(!(flags & MD_MARK_EMPH_INTRAWORD) || (flags & MD_MARK_EMPH_MOD3_MASK) != MD_MARK_EMPH_MOD3_1)
+ opener_chains[n_opener_chains++] = &ASTERISK_OPENERS_extraword_mod3_2;
+
+ /* Opener is the most recent mark from the allowed chains. */
+ for(i = 0; i < n_opener_chains; i++) {
+ if(opener_chains[i]->tail >= 0) {
+ int tmp_index = opener_chains[i]->tail;
+ MD_MARK* tmp_mark = &ctx->marks[tmp_index];
+ if(opener == NULL || tmp_mark->end > opener->end) {
+ opener_index = tmp_index;
+ opener = tmp_mark;
+ }
+ }
+ }
+ } else {
+ /* Simple emph. mark */
+ if(chain->tail >= 0) {
+ opener_index = chain->tail;
+ opener = &ctx->marks[opener_index];
+ }
+ }
+
+ /* Resolve, if we have found matching opener. */
+ if(opener != NULL) {
+ SZ opener_size = opener->end - opener->beg;
+ SZ closer_size = mark->end - mark->beg;
+ MD_MARKCHAIN* opener_chain = md_mark_chain(ctx, opener_index);
+
+ if(opener_size > closer_size) {
+ opener_index = md_split_emph_mark(ctx, opener_index, closer_size);
+ md_mark_chain_append(ctx, opener_chain, opener_index);
+ } else if(opener_size < closer_size) {
+ md_split_emph_mark(ctx, mark_index, closer_size - opener_size);
+ }
+
+ md_rollback(ctx, opener_index, mark_index, MD_ROLLBACK_CROSSING);
+ md_resolve_range(ctx, opener_chain, opener_index, mark_index);
+ return;
+ }
+ }
+
+ /* If we could not resolve as closer, we may be yet be an opener. */
+ if(mark->flags & MD_MARK_POTENTIAL_OPENER)
+ md_mark_chain_append(ctx, chain, mark_index);
+}
+
+static void
+md_analyze_tilde(MD_CTX* ctx, int mark_index)
+{
+ MD_MARK* mark = &ctx->marks[mark_index];
+ MD_MARKCHAIN* chain = md_mark_chain(ctx, mark_index);
+
+ /* We attempt to be Github Flavored Markdown compatible here. GFM accepts
+ * only tildes sequences of length 1 and 2, and the length of the opener
+ * and closer has to match. */
+
+ if((mark->flags & MD_MARK_POTENTIAL_CLOSER) && chain->head >= 0) {
+ int opener_index = chain->head;
+
+ md_rollback(ctx, opener_index, mark_index, MD_ROLLBACK_CROSSING);
+ md_resolve_range(ctx, chain, opener_index, mark_index);
+ return;
+ }
+
+ if(mark->flags & MD_MARK_POTENTIAL_OPENER)
+ md_mark_chain_append(ctx, chain, mark_index);
+}
+
+static void
+md_analyze_dollar(MD_CTX* ctx, int mark_index)
+{
+ /* This should mimic the way inline equations work in LaTeX, so there
+ * can only ever be one item in the chain (i.e. the dollars can't be
+ * nested). This is basically the same as the md_analyze_tilde function,
+ * except that we require matching openers and closers to be of the same
+ * length.
+ *
+ * E.g.: $abc$$def$$ => abc (display equation) def (end equation) */
+ if(DOLLAR_OPENERS.head >= 0) {
+ /* If the potential closer has a non-matching number of $, discard */
+ MD_MARK* open = &ctx->marks[DOLLAR_OPENERS.head];
+ MD_MARK* close = &ctx->marks[mark_index];
+
+ int opener_index = DOLLAR_OPENERS.head;
+ md_rollback(ctx, opener_index, mark_index, MD_ROLLBACK_ALL);
+ if (open->end - open->beg == close->end - close->beg) {
+ /* We are the matching closer */
+ md_resolve_range(ctx, &DOLLAR_OPENERS, opener_index, mark_index);
+ } else {
+ /* We don't match the opener, so discard old opener and insert as opener */
+ md_mark_chain_append(ctx, &DOLLAR_OPENERS, mark_index);
+ }
+ } else {
+ /* No unmatched openers, so we are opener */
+ md_mark_chain_append(ctx, &DOLLAR_OPENERS, mark_index);
+ }
+}
+
+static void
+md_analyze_permissive_url_autolink(MD_CTX* ctx, int mark_index)
+{
+ MD_MARK* opener = &ctx->marks[mark_index];
+ int closer_index = mark_index + 1;
+ MD_MARK* closer = &ctx->marks[closer_index];
+ MD_MARK* next_resolved_mark;
+ OFF off = opener->end;
+ int n_dots = FALSE;
+ int has_underscore_in_last_seg = FALSE;
+ int has_underscore_in_next_to_last_seg = FALSE;
+ int n_opened_parenthesis = 0;
+ int n_excess_parenthesis = 0;
+
+ /* Check for domain. */
+ while(off < ctx->size) {
+ if(ISALNUM(off) || CH(off) == _T('-')) {
+ off++;
+ } else if(CH(off) == _T('.')) {
+ /* We must see at least one period. */
+ n_dots++;
+ has_underscore_in_next_to_last_seg = has_underscore_in_last_seg;
+ has_underscore_in_last_seg = FALSE;
+ off++;
+ } else if(CH(off) == _T('_')) {
+ /* No underscore may be present in the last two domain segments. */
+ has_underscore_in_last_seg = TRUE;
+ off++;
+ } else {
+ break;
+ }
+ }
+ if(off > opener->end && CH(off-1) == _T('.')) {
+ off--;
+ n_dots--;
+ }
+ if(off <= opener->end || n_dots == 0 || has_underscore_in_next_to_last_seg || has_underscore_in_last_seg)
+ return;
+
+ /* Check for path. */
+ next_resolved_mark = closer + 1;
+ while(next_resolved_mark->ch == 'D' || !(next_resolved_mark->flags & MD_MARK_RESOLVED))
+ next_resolved_mark++;
+ while(off < next_resolved_mark->beg && CH(off) != _T('<') && !ISWHITESPACE(off) && !ISNEWLINE(off)) {
+ /* Parenthesis must be balanced. */
+ if(CH(off) == _T('(')) {
+ n_opened_parenthesis++;
+ } else if(CH(off) == _T(')')) {
+ if(n_opened_parenthesis > 0)
+ n_opened_parenthesis--;
+ else
+ n_excess_parenthesis++;
+ }
+
+ off++;
+ }
+
+ /* Trim a trailing punctuation from the end. */
+ while(TRUE) {
+ if(ISANYOF(off-1, _T("?!.,:*_~"))) {
+ off--;
+ } else if(CH(off-1) == ')' && n_excess_parenthesis > 0) {
+ /* Unmatched ')' can be in an interior of the path but not at the
+ * of it, so the auto-link may be safely nested in a parenthesis
+ * pair. */
+ off--;
+ n_excess_parenthesis--;
+ } else {
+ break;
+ }
+ }
+
+ /* Ok. Lets call it an auto-link. Adapt opener and create closer to zero
+ * length so all the contents becomes the link text. */
+ MD_ASSERT(closer->ch == 'D');
+ opener->end = opener->beg;
+ closer->ch = opener->ch;
+ closer->beg = off;
+ closer->end = off;
+ md_resolve_range(ctx, NULL, mark_index, closer_index);
+}
+
+/* The permissive autolinks do not have to be enclosed in '<' '>' but we
+ * instead impose stricter rules what is understood as an e-mail address
+ * here. Actually any non-alphanumeric characters with exception of '.'
+ * are prohibited both in username and after '@'. */
+static void
+md_analyze_permissive_email_autolink(MD_CTX* ctx, int mark_index)
+{
+ MD_MARK* opener = &ctx->marks[mark_index];
+ int closer_index;
+ MD_MARK* closer;
+ OFF beg = opener->beg;
+ OFF end = opener->end;
+ int dot_count = 0;
+
+ MD_ASSERT(CH(beg) == _T('@'));
+
+ /* Scan for name before '@'. */
+ while(beg > 0 && (ISALNUM(beg-1) || ISANYOF(beg-1, _T(".-_+"))))
+ beg--;
+
+ /* Scan for domain after '@'. */
+ while(end < ctx->size && (ISALNUM(end) || ISANYOF(end, _T(".-_")))) {
+ if(CH(end) == _T('.'))
+ dot_count++;
+ end++;
+ }
+ if(CH(end-1) == _T('.')) { /* Final '.' not part of it. */
+ dot_count--;
+ end--;
+ }
+ else if(ISANYOF2(end-1, _T('-'), _T('_'))) /* These are forbidden at the end. */
+ return;
+ if(CH(end-1) == _T('@') || dot_count == 0)
+ return;
+
+ /* Ok. Lets call it auto-link. Adapt opener and create closer to zero
+ * length so all the contents becomes the link text. */
+ closer_index = mark_index + 1;
+ closer = &ctx->marks[closer_index];
+ MD_ASSERT(closer->ch == 'D');
+
+ opener->beg = beg;
+ opener->end = beg;
+ closer->ch = opener->ch;
+ closer->beg = end;
+ closer->end = end;
+ md_resolve_range(ctx, NULL, mark_index, closer_index);
+}
+
+static inline void
+md_analyze_marks(MD_CTX* ctx, const MD_LINE* lines, int n_lines,
+ int mark_beg, int mark_end, const CHAR* mark_chars)
+{
+ int i = mark_beg;
+ MD_UNUSED(lines);
+ MD_UNUSED(n_lines);
+
+ while(i < mark_end) {
+ MD_MARK* mark = &ctx->marks[i];
+
+ /* Skip resolved spans. */
+ if(mark->flags & MD_MARK_RESOLVED) {
+ if(mark->flags & MD_MARK_OPENER) {
+ MD_ASSERT(i < mark->next);
+ i = mark->next + 1;
+ } else {
+ i++;
+ }
+ continue;
+ }
+
+ /* Skip marks we do not want to deal with. */
+ if(!ISANYOF_(mark->ch, mark_chars)) {
+ i++;
+ continue;
+ }
+
+ /* Analyze the mark. */
+ switch(mark->ch) {
+ case '[': /* Pass through. */
+ case '!': /* Pass through. */
+ case ']': md_analyze_bracket(ctx, i); break;
+ case '&': md_analyze_entity(ctx, i); break;
+ case '|': md_analyze_table_cell_boundary(ctx, i); break;
+ case '_': /* Pass through. */
+ case '*': md_analyze_emph(ctx, i); break;
+ case '~': md_analyze_tilde(ctx, i); break;
+ case '$': md_analyze_dollar(ctx, i); break;
+ case '.': /* Pass through. */
+ case ':': md_analyze_permissive_url_autolink(ctx, i); break;
+ case '@': md_analyze_permissive_email_autolink(ctx, i); break;
+ }
+
+ i++;
+ }
+}
+
+/* Analyze marks (build ctx->marks). */
+static int
+md_analyze_inlines(MD_CTX* ctx, const MD_LINE* lines, int n_lines, int table_mode)
+{
+ int ret;
+
+ /* Reset the previously collected stack of marks. */
+ ctx->n_marks = 0;
+
+ /* Collect all marks. */
+ MD_CHECK(md_collect_marks(ctx, lines, n_lines, table_mode));
+
+ /* We analyze marks in few groups to handle their precedence. */
+ /* (1) Entities; code spans; autolinks; raw HTML. */
+ md_analyze_marks(ctx, lines, n_lines, 0, ctx->n_marks, _T("&"));
+
+ /* (2) Links. */
+ md_analyze_marks(ctx, lines, n_lines, 0, ctx->n_marks, _T("[]!"));
+ MD_CHECK(md_resolve_links(ctx, lines, n_lines));
+ BRACKET_OPENERS.head = -1;
+ BRACKET_OPENERS.tail = -1;
+ ctx->unresolved_link_head = -1;
+ ctx->unresolved_link_tail = -1;
+
+ if(table_mode) {
+ /* (3) Analyze table cell boundaries.
+ * Note we reset TABLECELLBOUNDARIES chain prior to the call md_analyze_marks(),
+ * not after, because caller may need it. */
+ MD_ASSERT(n_lines == 1);
+ TABLECELLBOUNDARIES.head = -1;
+ TABLECELLBOUNDARIES.tail = -1;
+ ctx->n_table_cell_boundaries = 0;
+ md_analyze_marks(ctx, lines, n_lines, 0, ctx->n_marks, _T("|"));
+ return ret;
+ }
+
+ /* (4) Emphasis and strong emphasis; permissive autolinks. */
+ md_analyze_link_contents(ctx, lines, n_lines, 0, ctx->n_marks);
+
+abort:
+ return ret;
+}
+
+static void
+md_analyze_link_contents(MD_CTX* ctx, const MD_LINE* lines, int n_lines,
+ int mark_beg, int mark_end)
+{
+ int i;
+
+ md_analyze_marks(ctx, lines, n_lines, mark_beg, mark_end, _T("*_~$@:."));
+
+ for(i = OPENERS_CHAIN_FIRST; i <= OPENERS_CHAIN_LAST; i++) {
+ ctx->mark_chains[i].head = -1;
+ ctx->mark_chains[i].tail = -1;
+ }
+}
+
+static int
+md_enter_leave_span_a(MD_CTX* ctx, int enter, MD_SPANTYPE type,
+ const CHAR* dest, SZ dest_size, int prohibit_escapes_in_dest,
+ const CHAR* title, SZ title_size)
+{
+ MD_ATTRIBUTE_BUILD href_build = { 0 };
+ MD_ATTRIBUTE_BUILD title_build = { 0 };
+ MD_SPAN_A_DETAIL det;
+ int ret = 0;
+
+ /* Note we here rely on fact that MD_SPAN_A_DETAIL and
+ * MD_SPAN_IMG_DETAIL are binary-compatible. */
+ memset(&det, 0, sizeof(MD_SPAN_A_DETAIL));
+ MD_CHECK(md_build_attribute(ctx, dest, dest_size,
+ (prohibit_escapes_in_dest ? MD_BUILD_ATTR_NO_ESCAPES : 0),
+ &det.href, &href_build));
+ MD_CHECK(md_build_attribute(ctx, title, title_size, 0, &det.title, &title_build));
+
+ if(enter)
+ MD_ENTER_SPAN(type, &det);
+ else
+ MD_LEAVE_SPAN(type, &det);
+
+abort:
+ md_free_attribute(ctx, &href_build);
+ md_free_attribute(ctx, &title_build);
+ return ret;
+}
+
+static int
+md_enter_leave_span_wikilink(MD_CTX* ctx, int enter, const CHAR* target, SZ target_size)
+{
+ MD_ATTRIBUTE_BUILD target_build = { 0 };
+ MD_SPAN_WIKILINK_DETAIL det;
+ int ret = 0;
+
+ memset(&det, 0, sizeof(MD_SPAN_WIKILINK_DETAIL));
+ MD_CHECK(md_build_attribute(ctx, target, target_size, 0, &det.target, &target_build));
+
+ if (enter)
+ MD_ENTER_SPAN(MD_SPAN_WIKILINK, &det);
+ else
+ MD_LEAVE_SPAN(MD_SPAN_WIKILINK, &det);
+
+abort:
+ md_free_attribute(ctx, &target_build);
+ return ret;
+}
+
+
+/* Render the output, accordingly to the analyzed ctx->marks. */
+static int
+md_process_inlines(MD_CTX* ctx, const MD_LINE* lines, int n_lines)
+{
+ MD_TEXTTYPE text_type;
+ const MD_LINE* line = lines;
+ MD_MARK* prev_mark = NULL;
+ MD_MARK* mark;
+ OFF off = lines[0].beg;
+ OFF end = lines[n_lines-1].end;
+ int enforce_hardbreak = 0;
+ int ret = 0;
+
+ /* Find first resolved mark. Note there is always at least one resolved
+ * mark, the dummy last one after the end of the latest line we actually
+ * never really reach. This saves us of a lot of special checks and cases
+ * in this function. */
+ mark = ctx->marks;
+ while(!(mark->flags & MD_MARK_RESOLVED))
+ mark++;
+
+ text_type = MD_TEXT_NORMAL;
+
+ while(1) {
+ /* Process the text up to the next mark or end-of-line. */
+ OFF tmp = (line->end < mark->beg ? line->end : mark->beg);
+ if(tmp > off) {
+ MD_TEXT(text_type, STR(off), tmp - off);
+ off = tmp;
+ }
+
+ /* If reached the mark, process it and move to next one. */
+ if(off >= mark->beg) {
+ switch(mark->ch) {
+ case '\\': /* Backslash escape. */
+ if(ISNEWLINE(mark->beg+1))
+ enforce_hardbreak = 1;
+ else
+ MD_TEXT(text_type, STR(mark->beg+1), 1);
+ break;
+
+ case ' ': /* Non-trivial space. */
+ MD_TEXT(text_type, _T(" "), 1);
+ break;
+
+ case '`': /* Code span. */
+ if(mark->flags & MD_MARK_OPENER) {
+ MD_ENTER_SPAN(MD_SPAN_CODE, NULL);
+ text_type = MD_TEXT_CODE;
+ } else {
+ MD_LEAVE_SPAN(MD_SPAN_CODE, NULL);
+ text_type = MD_TEXT_NORMAL;
+ }
+ break;
+
+ case '_': /* Underline (or emphasis if we fall through). */
+ if(ctx->parser.flags & MD_FLAG_UNDERLINE) {
+ if(mark->flags & MD_MARK_OPENER) {
+ while(off < mark->end) {
+ MD_ENTER_SPAN(MD_SPAN_U, NULL);
+ off++;
+ }
+ } else {
+ while(off < mark->end) {
+ MD_LEAVE_SPAN(MD_SPAN_U, NULL);
+ off++;
+ }
+ }
+ break;
+ }
+ MD_FALLTHROUGH();
+
+ case '*': /* Emphasis, strong emphasis. */
+ if(mark->flags & MD_MARK_OPENER) {
+ if((mark->end - off) % 2) {
+ MD_ENTER_SPAN(MD_SPAN_EM, NULL);
+ off++;
+ }
+ while(off + 1 < mark->end) {
+ MD_ENTER_SPAN(MD_SPAN_STRONG, NULL);
+ off += 2;
+ }
+ } else {
+ while(off + 1 < mark->end) {
+ MD_LEAVE_SPAN(MD_SPAN_STRONG, NULL);
+ off += 2;
+ }
+ if((mark->end - off) % 2) {
+ MD_LEAVE_SPAN(MD_SPAN_EM, NULL);
+ off++;
+ }
+ }
+ break;
+
+ case '~':
+ if(mark->flags & MD_MARK_OPENER)
+ MD_ENTER_SPAN(MD_SPAN_DEL, NULL);
+ else
+ MD_LEAVE_SPAN(MD_SPAN_DEL, NULL);
+ break;
+
+ case '$':
+ if(mark->flags & MD_MARK_OPENER) {
+ MD_ENTER_SPAN((mark->end - off) % 2 ? MD_SPAN_LATEXMATH : MD_SPAN_LATEXMATH_DISPLAY, NULL);
+ text_type = MD_TEXT_LATEXMATH;
+ } else {
+ MD_LEAVE_SPAN((mark->end - off) % 2 ? MD_SPAN_LATEXMATH : MD_SPAN_LATEXMATH_DISPLAY, NULL);
+ text_type = MD_TEXT_NORMAL;
+ }
+ break;
+
+ case '[': /* Link, wiki link, image. */
+ case '!':
+ case ']':
+ {
+ const MD_MARK* opener = (mark->ch != ']' ? mark : &ctx->marks[mark->prev]);
+ const MD_MARK* closer = &ctx->marks[opener->next];
+ const MD_MARK* dest_mark;
+ const MD_MARK* title_mark;
+
+ if ((opener->ch == '[' && closer->ch == ']') &&
+ opener->end - opener->beg >= 2 &&
+ closer->end - closer->beg >= 2)
+ {
+ int has_label = (opener->end - opener->beg > 2);
+ SZ target_sz;
+
+ if(has_label)
+ target_sz = opener->end - (opener->beg+2);
+ else
+ target_sz = closer->beg - opener->end;
+
+ MD_CHECK(md_enter_leave_span_wikilink(ctx, (mark->ch != ']'),
+ has_label ? STR(opener->beg+2) : STR(opener->end),
+ target_sz));
+
+ break;
+ }
+
+ dest_mark = opener+1;
+ MD_ASSERT(dest_mark->ch == 'D');
+ title_mark = opener+2;
+ MD_ASSERT(title_mark->ch == 'D');
+
+ MD_CHECK(md_enter_leave_span_a(ctx, (mark->ch != ']'),
+ (opener->ch == '!' ? MD_SPAN_IMG : MD_SPAN_A),
+ STR(dest_mark->beg), dest_mark->end - dest_mark->beg, FALSE,
+ md_mark_get_ptr(ctx, (int)(title_mark - ctx->marks)),
+ title_mark->prev));
+
+ /* link/image closer may span multiple lines. */
+ if(mark->ch == ']') {
+ while(mark->end > line->end)
+ line++;
+ }
+
+ break;
+ }
+
+ case '<':
+ case '>': /* Autolink or raw HTML. */
+ if(!(mark->flags & MD_MARK_AUTOLINK)) {
+ /* Raw HTML. */
+ if(mark->flags & MD_MARK_OPENER)
+ text_type = MD_TEXT_HTML;
+ else
+ text_type = MD_TEXT_NORMAL;
+ break;
+ }
+ /* Pass through, if auto-link. */
+ MD_FALLTHROUGH();
+
+ case '@': /* Permissive e-mail autolink. */
+ case ':': /* Permissive URL autolink. */
+ case '.': /* Permissive WWW autolink. */
+ {
+ MD_MARK* opener = ((mark->flags & MD_MARK_OPENER) ? mark : &ctx->marks[mark->prev]);
+ MD_MARK* closer = &ctx->marks[opener->next];
+ const CHAR* dest = STR(opener->end);
+ SZ dest_size = closer->beg - opener->end;
+
+ /* For permissive auto-links we do not know closer mark
+ * position at the time of md_collect_marks(), therefore
+ * it can be out-of-order in ctx->marks[].
+ *
+ * With this flag, we make sure that we output the closer
+ * only if we processed the opener. */
+ if(mark->flags & MD_MARK_OPENER)
+ closer->flags |= MD_MARK_VALIDPERMISSIVEAUTOLINK;
+
+ if(opener->ch == '@' || opener->ch == '.') {
+ dest_size += 7;
+ MD_TEMP_BUFFER(dest_size * sizeof(CHAR));
+ memcpy(ctx->buffer,
+ (opener->ch == '@' ? _T("mailto:") : _T("http://")),
+ 7 * sizeof(CHAR));
+ memcpy(ctx->buffer + 7, dest, (dest_size-7) * sizeof(CHAR));
+ dest = ctx->buffer;
+ }
+
+ if(closer->flags & MD_MARK_VALIDPERMISSIVEAUTOLINK)
+ MD_CHECK(md_enter_leave_span_a(ctx, (mark->flags & MD_MARK_OPENER),
+ MD_SPAN_A, dest, dest_size, TRUE, NULL, 0));
+ break;
+ }
+
+ case '&': /* Entity. */
+ MD_TEXT(MD_TEXT_ENTITY, STR(mark->beg), mark->end - mark->beg);
+ break;
+
+ case '\0':
+ MD_TEXT(MD_TEXT_NULLCHAR, _T(""), 1);
+ break;
+
+ case 127:
+ goto abort;
+ }
+
+ off = mark->end;
+
+ /* Move to next resolved mark. */
+ prev_mark = mark;
+ mark++;
+ while(!(mark->flags & MD_MARK_RESOLVED) || mark->beg < off)
+ mark++;
+ }
+
+ /* If reached end of line, move to next one. */
+ if(off >= line->end) {
+ /* If it is the last line, we are done. */
+ if(off >= end)
+ break;
+
+ if(text_type == MD_TEXT_CODE || text_type == MD_TEXT_LATEXMATH) {
+ OFF tmp;
+
+ MD_ASSERT(prev_mark != NULL);
+ MD_ASSERT(ISANYOF2_(prev_mark->ch, '`', '$') && (prev_mark->flags & MD_MARK_OPENER));
+ MD_ASSERT(ISANYOF2_(mark->ch, '`', '$') && (mark->flags & MD_MARK_CLOSER));
+
+ /* Inside a code span, trailing line whitespace has to be
+ * outputted. */
+ tmp = off;
+ while(off < ctx->size && ISBLANK(off))
+ off++;
+ if(off > tmp)
+ MD_TEXT(text_type, STR(tmp), off-tmp);
+
+ /* and new lines are transformed into single spaces. */
+ if(prev_mark->end < off && off < mark->beg)
+ MD_TEXT(text_type, _T(" "), 1);
+ } else if(text_type == MD_TEXT_HTML) {
+ /* Inside raw HTML, we output the new line verbatim, including
+ * any trailing spaces. */
+ OFF tmp = off;
+
+ while(tmp < end && ISBLANK(tmp))
+ tmp++;
+ if(tmp > off)
+ MD_TEXT(MD_TEXT_HTML, STR(off), tmp - off);
+ MD_TEXT(MD_TEXT_HTML, _T("\n"), 1);
+ } else {
+ /* Output soft or hard line break. */
+ MD_TEXTTYPE break_type = MD_TEXT_SOFTBR;
+
+ if(text_type == MD_TEXT_NORMAL) {
+ if(enforce_hardbreak)
+ break_type = MD_TEXT_BR;
+ else if((CH(line->end) == _T(' ') && CH(line->end+1) == _T(' ')))
+ break_type = MD_TEXT_BR;
+ }
+
+ MD_TEXT(break_type, _T("\n"), 1);
+ }
+
+ /* Move to the next line. */
+ line++;
+ off = line->beg;
+
+ enforce_hardbreak = 0;
+ }
+ }
+
+abort:
+ return ret;
+}
+
+
+/***************************
+ *** Processing Tables ***
+ ***************************/
+
+static void
+md_analyze_table_alignment(MD_CTX* ctx, OFF beg, OFF end, MD_ALIGN* align, int n_align)
+{
+ static const MD_ALIGN align_map[] = { MD_ALIGN_DEFAULT, MD_ALIGN_LEFT, MD_ALIGN_RIGHT, MD_ALIGN_CENTER };
+ OFF off = beg;
+
+ while(n_align > 0) {
+ int index = 0; /* index into align_map[] */
+
+ while(CH(off) != _T('-'))
+ off++;
+ if(off > beg && CH(off-1) == _T(':'))
+ index |= 1;
+ while(off < end && CH(off) == _T('-'))
+ off++;
+ if(off < end && CH(off) == _T(':'))
+ index |= 2;
+
+ *align = align_map[index];
+ align++;
+ n_align--;
+ }
+
+}
+
+/* Forward declaration. */
+static int md_process_normal_block_contents(MD_CTX* ctx, const MD_LINE* lines, int n_lines);
+
+static int
+md_process_table_cell(MD_CTX* ctx, MD_BLOCKTYPE cell_type, MD_ALIGN align, OFF beg, OFF end)
+{
+ MD_LINE line;
+ MD_BLOCK_TD_DETAIL det;
+ int ret = 0;
+
+ while(beg < end && ISWHITESPACE(beg))
+ beg++;
+ while(end > beg && ISWHITESPACE(end-1))
+ end--;
+
+ det.align = align;
+ line.beg = beg;
+ line.end = end;
+
+ MD_ENTER_BLOCK(cell_type, &det);
+ MD_CHECK(md_process_normal_block_contents(ctx, &line, 1));
+ MD_LEAVE_BLOCK(cell_type, &det);
+
+abort:
+ return ret;
+}
+
+static int
+md_process_table_row(MD_CTX* ctx, MD_BLOCKTYPE cell_type, OFF beg, OFF end,
+ const MD_ALIGN* align, int col_count)
+{
+ MD_LINE line;
+ OFF* pipe_offs = NULL;
+ int i, j, k, n;
+ int ret = 0;
+
+ line.beg = beg;
+ line.end = end;
+
+ /* Break the line into table cells by identifying pipe characters who
+ * form the cell boundary. */
+ MD_CHECK(md_analyze_inlines(ctx, &line, 1, TRUE));
+
+ /* We have to remember the cell boundaries in local buffer because
+ * ctx->marks[] shall be reused during cell contents processing. */
+ n = ctx->n_table_cell_boundaries + 2;
+ pipe_offs = (OFF*) malloc(n * sizeof(OFF));
+ if(pipe_offs == NULL) {
+ MD_LOG("malloc() failed.");
+ ret = -1;
+ goto abort;
+ }
+ j = 0;
+ pipe_offs[j++] = beg;
+ for(i = TABLECELLBOUNDARIES.head; i >= 0; i = ctx->marks[i].next) {
+ MD_MARK* mark = &ctx->marks[i];
+ pipe_offs[j++] = mark->end;
+ }
+ pipe_offs[j++] = end+1;
+
+ /* Process cells. */
+ MD_ENTER_BLOCK(MD_BLOCK_TR, NULL);
+ k = 0;
+ for(i = 0; i < j-1 && k < col_count; i++) {
+ if(pipe_offs[i] < pipe_offs[i+1]-1)
+ MD_CHECK(md_process_table_cell(ctx, cell_type, align[k++], pipe_offs[i], pipe_offs[i+1]-1));
+ }
+ /* Make sure we call enough table cells even if the current table contains
+ * too few of them. */
+ while(k < col_count)
+ MD_CHECK(md_process_table_cell(ctx, cell_type, align[k++], 0, 0));
+ MD_LEAVE_BLOCK(MD_BLOCK_TR, NULL);
+
+abort:
+ free(pipe_offs);
+
+ /* Free any temporary memory blocks stored within some dummy marks. */
+ for(i = PTR_CHAIN.head; i >= 0; i = ctx->marks[i].next)
+ free(md_mark_get_ptr(ctx, i));
+ PTR_CHAIN.head = -1;
+ PTR_CHAIN.tail = -1;
+
+ return ret;
+}
+
+static int
+md_process_table_block_contents(MD_CTX* ctx, int col_count, const MD_LINE* lines, int n_lines)
+{
+ MD_ALIGN* align;
+ int i;
+ int ret = 0;
+
+ /* At least two lines have to be present: The column headers and the line
+ * with the underlines. */
+ MD_ASSERT(n_lines >= 2);
+
+ align = malloc(col_count * sizeof(MD_ALIGN));
+ if(align == NULL) {
+ MD_LOG("malloc() failed.");
+ ret = -1;
+ goto abort;
+ }
+
+ md_analyze_table_alignment(ctx, lines[1].beg, lines[1].end, align, col_count);
+
+ MD_ENTER_BLOCK(MD_BLOCK_THEAD, NULL);
+ MD_CHECK(md_process_table_row(ctx, MD_BLOCK_TH,
+ lines[0].beg, lines[0].end, align, col_count));
+ MD_LEAVE_BLOCK(MD_BLOCK_THEAD, NULL);
+
+ if(n_lines > 2) {
+ MD_ENTER_BLOCK(MD_BLOCK_TBODY, NULL);
+ for(i = 2; i < n_lines; i++) {
+ MD_CHECK(md_process_table_row(ctx, MD_BLOCK_TD,
+ lines[i].beg, lines[i].end, align, col_count));
+ }
+ MD_LEAVE_BLOCK(MD_BLOCK_TBODY, NULL);
+ }
+
+abort:
+ free(align);
+ return ret;
+}
+
+
+/**************************
+ *** Processing Block ***
+ **************************/
+
+#define MD_BLOCK_CONTAINER_OPENER 0x01
+#define MD_BLOCK_CONTAINER_CLOSER 0x02
+#define MD_BLOCK_CONTAINER (MD_BLOCK_CONTAINER_OPENER | MD_BLOCK_CONTAINER_CLOSER)
+#define MD_BLOCK_LOOSE_LIST 0x04
+#define MD_BLOCK_SETEXT_HEADER 0x08
+
+struct MD_BLOCK_tag {
+ MD_BLOCKTYPE type : 8;
+ unsigned flags : 8;
+
+ /* MD_BLOCK_H: Header level (1 - 6)
+ * MD_BLOCK_CODE: Non-zero if fenced, zero if indented.
+ * MD_BLOCK_LI: Task mark character (0 if not task list item, 'x', 'X' or ' ').
+ * MD_BLOCK_TABLE: Column count (as determined by the table underline).
+ */
+ unsigned data : 16;
+
+ /* Leaf blocks: Count of lines (MD_LINE or MD_VERBATIMLINE) on the block.
+ * MD_BLOCK_LI: Task mark offset in the input doc.
+ * MD_BLOCK_OL: Start item number.
+ */
+ unsigned n_lines;
+};
+
+struct MD_CONTAINER_tag {
+ CHAR ch;
+ unsigned is_loose : 8;
+ unsigned is_task : 8;
+ unsigned start;
+ unsigned mark_indent;
+ unsigned contents_indent;
+ OFF block_byte_off;
+ OFF task_mark_off;
+};
+
+
+static int
+md_process_normal_block_contents(MD_CTX* ctx, const MD_LINE* lines, int n_lines)
+{
+ int i;
+ int ret;
+
+ MD_CHECK(md_analyze_inlines(ctx, lines, n_lines, FALSE));
+ MD_CHECK(md_process_inlines(ctx, lines, n_lines));
+
+abort:
+ /* Free any temporary memory blocks stored within some dummy marks. */
+ for(i = PTR_CHAIN.head; i >= 0; i = ctx->marks[i].next)
+ free(md_mark_get_ptr(ctx, i));
+ PTR_CHAIN.head = -1;
+ PTR_CHAIN.tail = -1;
+
+ return ret;
+}
+
+static int
+md_process_verbatim_block_contents(MD_CTX* ctx, MD_TEXTTYPE text_type, const MD_VERBATIMLINE* lines, int n_lines)
+{
+ static const CHAR indent_chunk_str[] = _T(" ");
+ static const SZ indent_chunk_size = SIZEOF_ARRAY(indent_chunk_str) - 1;
+
+ int i;
+ int ret = 0;
+
+ for(i = 0; i < n_lines; i++) {
+ const MD_VERBATIMLINE* line = &lines[i];
+ int indent = line->indent;
+
+ MD_ASSERT(indent >= 0);
+
+ /* Output code indentation. */
+ while(indent > (int) indent_chunk_size) {
+ MD_TEXT(text_type, indent_chunk_str, indent_chunk_size);
+ indent -= indent_chunk_size;
+ }
+ if(indent > 0)
+ MD_TEXT(text_type, indent_chunk_str, indent);
+
+ /* Output the code line itself. */
+ MD_TEXT_INSECURE(text_type, STR(line->beg), line->end - line->beg);
+
+ /* Enforce end-of-line. */
+ MD_TEXT(text_type, _T("\n"), 1);
+ }
+
+abort:
+ return ret;
+}
+
+static int
+md_process_code_block_contents(MD_CTX* ctx, int is_fenced, const MD_VERBATIMLINE* lines, int n_lines)
+{
+ if(is_fenced) {
+ /* Skip the first line in case of fenced code: It is the fence.
+ * (Only the starting fence is present due to logic in md_analyze_line().) */
+ lines++;
+ n_lines--;
+ } else {
+ /* Ignore blank lines at start/end of indented code block. */
+ while(n_lines > 0 && lines[0].beg == lines[0].end) {
+ lines++;
+ n_lines--;
+ }
+ while(n_lines > 0 && lines[n_lines-1].beg == lines[n_lines-1].end) {
+ n_lines--;
+ }
+ }
+
+ if(n_lines == 0)
+ return 0;
+
+ return md_process_verbatim_block_contents(ctx, MD_TEXT_CODE, lines, n_lines);
+}
+
+static int
+md_setup_fenced_code_detail(MD_CTX* ctx, const MD_BLOCK* block, MD_BLOCK_CODE_DETAIL* det,
+ MD_ATTRIBUTE_BUILD* info_build, MD_ATTRIBUTE_BUILD* lang_build)
+{
+ const MD_VERBATIMLINE* fence_line = (const MD_VERBATIMLINE*)(block + 1);
+ OFF beg = fence_line->beg;
+ OFF end = fence_line->end;
+ OFF lang_end;
+ CHAR fence_ch = CH(fence_line->beg);
+ int ret = 0;
+
+ /* Skip the fence itself. */
+ while(beg < ctx->size && CH(beg) == fence_ch)
+ beg++;
+ /* Trim initial spaces. */
+ while(beg < ctx->size && CH(beg) == _T(' '))
+ beg++;
+
+ /* Trim trailing spaces. */
+ while(end > beg && CH(end-1) == _T(' '))
+ end--;
+
+ /* Build info string attribute. */
+ MD_CHECK(md_build_attribute(ctx, STR(beg), end - beg, 0, &det->info, info_build));
+
+ /* Build info string attribute. */
+ lang_end = beg;
+ while(lang_end < end && !ISWHITESPACE(lang_end))
+ lang_end++;
+ MD_CHECK(md_build_attribute(ctx, STR(beg), lang_end - beg, 0, &det->lang, lang_build));
+
+ det->fence_char = fence_ch;
+
+abort:
+ return ret;
+}
+
+static int
+md_process_leaf_block(MD_CTX* ctx, const MD_BLOCK* block)
+{
+ union {
+ MD_BLOCK_H_DETAIL header;
+ MD_BLOCK_CODE_DETAIL code;
+ MD_BLOCK_TABLE_DETAIL table;
+ } det;
+ MD_ATTRIBUTE_BUILD info_build;
+ MD_ATTRIBUTE_BUILD lang_build;
+ int is_in_tight_list;
+ int clean_fence_code_detail = FALSE;
+ int ret = 0;
+
+ memset(&det, 0, sizeof(det));
+
+ if(ctx->n_containers == 0)
+ is_in_tight_list = FALSE;
+ else
+ is_in_tight_list = !ctx->containers[ctx->n_containers-1].is_loose;
+
+ switch(block->type) {
+ case MD_BLOCK_H:
+ det.header.level = block->data;
+ break;
+
+ case MD_BLOCK_CODE:
+ /* For fenced code block, we may need to set the info string. */
+ if(block->data != 0) {
+ memset(&det.code, 0, sizeof(MD_BLOCK_CODE_DETAIL));
+ clean_fence_code_detail = TRUE;
+ MD_CHECK(md_setup_fenced_code_detail(ctx, block, &det.code, &info_build, &lang_build));
+ }
+ break;
+
+ case MD_BLOCK_TABLE:
+ det.table.col_count = block->data;
+ det.table.head_row_count = 1;
+ det.table.body_row_count = block->n_lines - 2;
+ break;
+
+ default:
+ /* Noop. */
+ break;
+ }
+
+ if(!is_in_tight_list || block->type != MD_BLOCK_P)
+ MD_ENTER_BLOCK(block->type, (void*) &det);
+
+ /* Process the block contents accordingly to is type. */
+ switch(block->type) {
+ case MD_BLOCK_HR:
+ /* noop */
+ break;
+
+ case MD_BLOCK_CODE:
+ MD_CHECK(md_process_code_block_contents(ctx, (block->data != 0),
+ (const MD_VERBATIMLINE*)(block + 1), block->n_lines));
+ break;
+
+ case MD_BLOCK_HTML:
+ MD_CHECK(md_process_verbatim_block_contents(ctx, MD_TEXT_HTML,
+ (const MD_VERBATIMLINE*)(block + 1), block->n_lines));
+ break;
+
+ case MD_BLOCK_TABLE:
+ MD_CHECK(md_process_table_block_contents(ctx, block->data,
+ (const MD_LINE*)(block + 1), block->n_lines));
+ break;
+
+ default:
+ MD_CHECK(md_process_normal_block_contents(ctx,
+ (const MD_LINE*)(block + 1), block->n_lines));
+ break;
+ }
+
+ if(!is_in_tight_list || block->type != MD_BLOCK_P)
+ MD_LEAVE_BLOCK(block->type, (void*) &det);
+
+abort:
+ if(clean_fence_code_detail) {
+ md_free_attribute(ctx, &info_build);
+ md_free_attribute(ctx, &lang_build);
+ }
+ return ret;
+}
+
+static int
+md_process_all_blocks(MD_CTX* ctx)
+{
+ int byte_off = 0;
+ int ret = 0;
+
+ /* ctx->containers now is not needed for detection of lists and list items
+ * so we reuse it for tracking what lists are loose or tight. We rely
+ * on the fact the vector is large enough to hold the deepest nesting
+ * level of lists. */
+ ctx->n_containers = 0;
+
+ while(byte_off < ctx->n_block_bytes) {
+ MD_BLOCK* block = (MD_BLOCK*)((char*)ctx->block_bytes + byte_off);
+ union {
+ MD_BLOCK_UL_DETAIL ul;
+ MD_BLOCK_OL_DETAIL ol;
+ MD_BLOCK_LI_DETAIL li;
+ } det;
+
+ switch(block->type) {
+ case MD_BLOCK_UL:
+ det.ul.is_tight = (block->flags & MD_BLOCK_LOOSE_LIST) ? FALSE : TRUE;
+ det.ul.mark = (CHAR) block->data;
+ break;
+
+ case MD_BLOCK_OL:
+ det.ol.start = block->n_lines;
+ det.ol.is_tight = (block->flags & MD_BLOCK_LOOSE_LIST) ? FALSE : TRUE;
+ det.ol.mark_delimiter = (CHAR) block->data;
+ break;
+
+ case MD_BLOCK_LI:
+ det.li.is_task = (block->data != 0);
+ det.li.task_mark = (CHAR) block->data;
+ det.li.task_mark_offset = (OFF) block->n_lines;
+ break;
+
+ default:
+ /* noop */
+ break;
+ }
+
+ if(block->flags & MD_BLOCK_CONTAINER) {
+ if(block->flags & MD_BLOCK_CONTAINER_CLOSER) {
+ MD_LEAVE_BLOCK(block->type, &det);
+
+ if(block->type == MD_BLOCK_UL || block->type == MD_BLOCK_OL || block->type == MD_BLOCK_QUOTE)
+ ctx->n_containers--;
+ }
+
+ if(block->flags & MD_BLOCK_CONTAINER_OPENER) {
+ MD_ENTER_BLOCK(block->type, &det);
+
+ if(block->type == MD_BLOCK_UL || block->type == MD_BLOCK_OL) {
+ ctx->containers[ctx->n_containers].is_loose = (block->flags & MD_BLOCK_LOOSE_LIST);
+ ctx->n_containers++;
+ } else if(block->type == MD_BLOCK_QUOTE) {
+ /* This causes that any text in a block quote, even if
+ * nested inside a tight list item, is wrapped with
+ * <p>...</p>. */
+ ctx->containers[ctx->n_containers].is_loose = TRUE;
+ ctx->n_containers++;
+ }
+ }
+ } else {
+ MD_CHECK(md_process_leaf_block(ctx, block));
+
+ if(block->type == MD_BLOCK_CODE || block->type == MD_BLOCK_HTML)
+ byte_off += block->n_lines * sizeof(MD_VERBATIMLINE);
+ else
+ byte_off += block->n_lines * sizeof(MD_LINE);
+ }
+
+ byte_off += sizeof(MD_BLOCK);
+ }
+
+ ctx->n_block_bytes = 0;
+
+abort:
+ return ret;
+}
+
+
+/************************************
+ *** Grouping Lines into Blocks ***
+ ************************************/
+
+static void*
+md_push_block_bytes(MD_CTX* ctx, int n_bytes)
+{
+ void* ptr;
+
+ if(ctx->n_block_bytes + n_bytes > ctx->alloc_block_bytes) {
+ void* new_block_bytes;
+
+ ctx->alloc_block_bytes = (ctx->alloc_block_bytes > 0
+ ? ctx->alloc_block_bytes + ctx->alloc_block_bytes / 2
+ : 512);
+ new_block_bytes = realloc(ctx->block_bytes, ctx->alloc_block_bytes);
+ if(new_block_bytes == NULL) {
+ MD_LOG("realloc() failed.");
+ return NULL;
+ }
+
+ /* Fix the ->current_block after the reallocation. */
+ if(ctx->current_block != NULL) {
+ OFF off_current_block = (OFF) ((char*) ctx->current_block - (char*) ctx->block_bytes);
+ ctx->current_block = (MD_BLOCK*) ((char*) new_block_bytes + off_current_block);
+ }
+
+ ctx->block_bytes = new_block_bytes;
+ }
+
+ ptr = (char*)ctx->block_bytes + ctx->n_block_bytes;
+ ctx->n_block_bytes += n_bytes;
+ return ptr;
+}
+
+static int
+md_start_new_block(MD_CTX* ctx, const MD_LINE_ANALYSIS* line)
+{
+ MD_BLOCK* block;
+
+ MD_ASSERT(ctx->current_block == NULL);
+
+ block = (MD_BLOCK*) md_push_block_bytes(ctx, sizeof(MD_BLOCK));
+ if(block == NULL)
+ return -1;
+
+ switch(line->type) {
+ case MD_LINE_HR:
+ block->type = MD_BLOCK_HR;
+ break;
+
+ case MD_LINE_ATXHEADER:
+ case MD_LINE_SETEXTHEADER:
+ block->type = MD_BLOCK_H;
+ break;
+
+ case MD_LINE_FENCEDCODE:
+ case MD_LINE_INDENTEDCODE:
+ block->type = MD_BLOCK_CODE;
+ break;
+
+ case MD_LINE_TEXT:
+ block->type = MD_BLOCK_P;
+ break;
+
+ case MD_LINE_HTML:
+ block->type = MD_BLOCK_HTML;
+ break;
+
+ case MD_LINE_BLANK:
+ case MD_LINE_SETEXTUNDERLINE:
+ case MD_LINE_TABLEUNDERLINE:
+ default:
+ MD_UNREACHABLE();
+ break;
+ }
+
+ block->flags = 0;
+ block->data = line->data;
+ block->n_lines = 0;
+
+ ctx->current_block = block;
+ return 0;
+}
+
+/* Eat from start of current (textual) block any reference definitions and
+ * remember them so we can resolve any links referring to them.
+ *
+ * (Reference definitions can only be at start of it as they cannot break
+ * a paragraph.)
+ */
+static int
+md_consume_link_reference_definitions(MD_CTX* ctx)
+{
+ MD_LINE* lines = (MD_LINE*) (ctx->current_block + 1);
+ int n_lines = ctx->current_block->n_lines;
+ int n = 0;
+
+ /* Compute how many lines at the start of the block form one or more
+ * reference definitions. */
+ while(n < n_lines) {
+ int n_link_ref_lines;
+
+ n_link_ref_lines = md_is_link_reference_definition(ctx,
+ lines + n, n_lines - n);
+ /* Not a reference definition? */
+ if(n_link_ref_lines == 0)
+ break;
+
+ /* We fail if it is the ref. def. but it could not be stored due
+ * a memory allocation error. */
+ if(n_link_ref_lines < 0)
+ return -1;
+
+ n += n_link_ref_lines;
+ }
+
+ /* If there was at least one reference definition, we need to remove
+ * its lines from the block, or perhaps even the whole block. */
+ if(n > 0) {
+ if(n == n_lines) {
+ /* Remove complete block. */
+ ctx->n_block_bytes -= n * sizeof(MD_LINE);
+ ctx->n_block_bytes -= sizeof(MD_BLOCK);
+ ctx->current_block = NULL;
+ } else {
+ /* Remove just some initial lines from the block. */
+ memmove(lines, lines + n, (n_lines - n) * sizeof(MD_LINE));
+ ctx->current_block->n_lines -= n;
+ ctx->n_block_bytes -= n * sizeof(MD_LINE);
+ }
+ }
+
+ return 0;
+}
+
+static int
+md_end_current_block(MD_CTX* ctx)
+{
+ int ret = 0;
+
+ if(ctx->current_block == NULL)
+ return ret;
+
+ /* Check whether there is a reference definition. (We do this here instead
+ * of in md_analyze_line() because reference definition can take multiple
+ * lines.) */
+ if(ctx->current_block->type == MD_BLOCK_P ||
+ (ctx->current_block->type == MD_BLOCK_H && (ctx->current_block->flags & MD_BLOCK_SETEXT_HEADER)))
+ {
+ MD_LINE* lines = (MD_LINE*) (ctx->current_block + 1);
+ if(CH(lines[0].beg) == _T('[')) {
+ MD_CHECK(md_consume_link_reference_definitions(ctx));
+ if(ctx->current_block == NULL)
+ return ret;
+ }
+ }
+
+ if(ctx->current_block->type == MD_BLOCK_H && (ctx->current_block->flags & MD_BLOCK_SETEXT_HEADER)) {
+ int n_lines = ctx->current_block->n_lines;
+
+ if(n_lines > 1) {
+ /* Get rid of the underline. */
+ ctx->current_block->n_lines--;
+ ctx->n_block_bytes -= sizeof(MD_LINE);
+ } else {
+ /* Only the underline has left after eating the ref. defs.
+ * Keep the line as beginning of a new ordinary paragraph. */
+ ctx->current_block->type = MD_BLOCK_P;
+ return 0;
+ }
+ }
+
+ /* Mark we are not building any block anymore. */
+ ctx->current_block = NULL;
+
+abort:
+ return ret;
+}
+
+static int
+md_add_line_into_current_block(MD_CTX* ctx, const MD_LINE_ANALYSIS* analysis)
+{
+ MD_ASSERT(ctx->current_block != NULL);
+
+ if(ctx->current_block->type == MD_BLOCK_CODE || ctx->current_block->type == MD_BLOCK_HTML) {
+ MD_VERBATIMLINE* line;
+
+ line = (MD_VERBATIMLINE*) md_push_block_bytes(ctx, sizeof(MD_VERBATIMLINE));
+ if(line == NULL)
+ return -1;
+
+ line->indent = analysis->indent;
+ line->beg = analysis->beg;
+ line->end = analysis->end;
+ } else {
+ MD_LINE* line;
+
+ line = (MD_LINE*) md_push_block_bytes(ctx, sizeof(MD_LINE));
+ if(line == NULL)
+ return -1;
+
+ line->beg = analysis->beg;
+ line->end = analysis->end;
+ }
+ ctx->current_block->n_lines++;
+
+ return 0;
+}
+
+static int
+md_push_container_bytes(MD_CTX* ctx, MD_BLOCKTYPE type, unsigned start,
+ unsigned data, unsigned flags)
+{
+ MD_BLOCK* block;
+ int ret = 0;
+
+ MD_CHECK(md_end_current_block(ctx));
+
+ block = (MD_BLOCK*) md_push_block_bytes(ctx, sizeof(MD_BLOCK));
+ if(block == NULL)
+ return -1;
+
+ block->type = type;
+ block->flags = flags;
+ block->data = data;
+ block->n_lines = start;
+
+abort:
+ return ret;
+}
+
+
+
+/***********************
+ *** Line Analysis ***
+ ***********************/
+
+static int
+md_is_hr_line(MD_CTX* ctx, OFF beg, OFF* p_end, OFF* p_killer)
+{
+ OFF off = beg + 1;
+ int n = 1;
+
+ while(off < ctx->size && (CH(off) == CH(beg) || CH(off) == _T(' ') || CH(off) == _T('\t'))) {
+ if(CH(off) == CH(beg))
+ n++;
+ off++;
+ }
+
+ if(n < 3) {
+ *p_killer = off;
+ return FALSE;
+ }
+
+ /* Nothing else can be present on the line. */
+ if(off < ctx->size && !ISNEWLINE(off)) {
+ *p_killer = off;
+ return FALSE;
+ }
+
+ *p_end = off;
+ return TRUE;
+}
+
+static int
+md_is_atxheader_line(MD_CTX* ctx, OFF beg, OFF* p_beg, OFF* p_end, unsigned* p_level)
+{
+ int n;
+ OFF off = beg + 1;
+
+ while(off < ctx->size && CH(off) == _T('#') && off - beg < 7)
+ off++;
+ n = off - beg;
+
+ if(n > 6)
+ return FALSE;
+ *p_level = n;
+
+ if(!(ctx->parser.flags & MD_FLAG_PERMISSIVEATXHEADERS) && off < ctx->size &&
+ CH(off) != _T(' ') && CH(off) != _T('\t') && !ISNEWLINE(off))
+ return FALSE;
+
+ while(off < ctx->size && CH(off) == _T(' '))
+ off++;
+ *p_beg = off;
+ *p_end = off;
+ return TRUE;
+}
+
+static int
+md_is_setext_underline(MD_CTX* ctx, OFF beg, OFF* p_end, unsigned* p_level)
+{
+ OFF off = beg + 1;
+
+ while(off < ctx->size && CH(off) == CH(beg))
+ off++;
+
+ /* Optionally, space(s) can follow. */
+ while(off < ctx->size && CH(off) == _T(' '))
+ off++;
+
+ /* But nothing more is allowed on the line. */
+ if(off < ctx->size && !ISNEWLINE(off))
+ return FALSE;
+
+ *p_level = (CH(beg) == _T('=') ? 1 : 2);
+ *p_end = off;
+ return TRUE;
+}
+
+static int
+md_is_table_underline(MD_CTX* ctx, OFF beg, OFF* p_end, unsigned* p_col_count)
+{
+ OFF off = beg;
+ int found_pipe = FALSE;
+ unsigned col_count = 0;
+
+ if(off < ctx->size && CH(off) == _T('|')) {
+ found_pipe = TRUE;
+ off++;
+ while(off < ctx->size && ISWHITESPACE(off))
+ off++;
+ }
+
+ while(1) {
+ OFF cell_beg;
+ int delimited = FALSE;
+
+ /* Cell underline ("-----", ":----", "----:" or ":----:") */
+ cell_beg = off;
+ if(off < ctx->size && CH(off) == _T(':'))
+ off++;
+ while(off < ctx->size && CH(off) == _T('-'))
+ off++;
+ if(off < ctx->size && CH(off) == _T(':'))
+ off++;
+ if(off - cell_beg < 3)
+ return FALSE;
+
+ col_count++;
+
+ /* Pipe delimiter (optional at the end of line). */
+ while(off < ctx->size && ISWHITESPACE(off))
+ off++;
+ if(off < ctx->size && CH(off) == _T('|')) {
+ delimited = TRUE;
+ found_pipe = TRUE;
+ off++;
+ while(off < ctx->size && ISWHITESPACE(off))
+ off++;
+ }
+
+ /* Success, if we reach end of line. */
+ if(off >= ctx->size || ISNEWLINE(off))
+ break;
+
+ if(!delimited)
+ return FALSE;
+ }
+
+ if(!found_pipe)
+ return FALSE;
+
+ *p_end = off;
+ *p_col_count = col_count;
+ return TRUE;
+}
+
+static int
+md_is_opening_code_fence(MD_CTX* ctx, OFF beg, OFF* p_end)
+{
+ OFF off = beg;
+
+ while(off < ctx->size && CH(off) == CH(beg))
+ off++;
+
+ /* Fence must have at least three characters. */
+ if(off - beg < 3)
+ return FALSE;
+
+ ctx->code_fence_length = off - beg;
+
+ /* Optionally, space(s) can follow. */
+ while(off < ctx->size && CH(off) == _T(' '))
+ off++;
+
+ /* Optionally, an info string can follow. */
+ while(off < ctx->size && !ISNEWLINE(off)) {
+ /* Backtick-based fence must not contain '`' in the info string. */
+ if(CH(beg) == _T('`') && CH(off) == _T('`'))
+ return FALSE;
+ off++;
+ }
+
+ *p_end = off;
+ return TRUE;
+}
+
+static int
+md_is_closing_code_fence(MD_CTX* ctx, CHAR ch, OFF beg, OFF* p_end)
+{
+ OFF off = beg;
+ int ret = FALSE;
+
+ /* Closing fence must have at least the same length and use same char as
+ * opening one. */
+ while(off < ctx->size && CH(off) == ch)
+ off++;
+ if(off - beg < ctx->code_fence_length)
+ goto out;
+
+ /* Optionally, space(s) can follow */
+ while(off < ctx->size && CH(off) == _T(' '))
+ off++;
+
+ /* But nothing more is allowed on the line. */
+ if(off < ctx->size && !ISNEWLINE(off))
+ goto out;
+
+ ret = TRUE;
+
+out:
+ /* Note we set *p_end even on failure: If we are not closing fence, caller
+ * would eat the line anyway without any parsing. */
+ *p_end = off;
+ return ret;
+}
+
+/* Returns type of the raw HTML block, or FALSE if it is not HTML block.
+ * (Refer to CommonMark specification for details about the types.)
+ */
+static int
+md_is_html_block_start_condition(MD_CTX* ctx, OFF beg)
+{
+ typedef struct TAG_tag TAG;
+ struct TAG_tag {
+ const CHAR* name;
+ unsigned len : 8;
+ };
+
+ /* Type 6 is started by a long list of allowed tags. We use two-level
+ * tree to speed-up the search. */
+#ifdef X
+ #undef X
+#endif
+#define X(name) { _T(name), (sizeof(name)-1) / sizeof(CHAR) }
+#define Xend { NULL, 0 }
+ static const TAG t1[] = { X("pre"), X("script"), X("style"), X("textarea"), Xend };
+
+ static const TAG a6[] = { X("address"), X("article"), X("aside"), Xend };
+ static const TAG b6[] = { X("base"), X("basefont"), X("blockquote"), X("body"), Xend };
+ static const TAG c6[] = { X("caption"), X("center"), X("col"), X("colgroup"), Xend };
+ static const TAG d6[] = { X("dd"), X("details"), X("dialog"), X("dir"),
+ X("div"), X("dl"), X("dt"), Xend };
+ static const TAG f6[] = { X("fieldset"), X("figcaption"), X("figure"), X("footer"),
+ X("form"), X("frame"), X("frameset"), Xend };
+ static const TAG h6[] = { X("h1"), X("head"), X("header"), X("hr"), X("html"), Xend };
+ static const TAG i6[] = { X("iframe"), Xend };
+ static const TAG l6[] = { X("legend"), X("li"), X("link"), Xend };
+ static const TAG m6[] = { X("main"), X("menu"), X("menuitem"), Xend };
+ static const TAG n6[] = { X("nav"), X("noframes"), Xend };
+ static const TAG o6[] = { X("ol"), X("optgroup"), X("option"), Xend };
+ static const TAG p6[] = { X("p"), X("param"), Xend };
+ static const TAG s6[] = { X("section"), X("source"), X("summary"), Xend };
+ static const TAG t6[] = { X("table"), X("tbody"), X("td"), X("tfoot"), X("th"),
+ X("thead"), X("title"), X("tr"), X("track"), Xend };
+ static const TAG u6[] = { X("ul"), Xend };
+ static const TAG xx[] = { Xend };
+#undef X
+
+ static const TAG* map6[26] = {
+ a6, b6, c6, d6, xx, f6, xx, h6, i6, xx, xx, l6, m6,
+ n6, o6, p6, xx, xx, s6, t6, u6, xx, xx, xx, xx, xx
+ };
+ OFF off = beg + 1;
+ int i;
+
+ /* Check for type 1: <script, <pre, or <style */
+ for(i = 0; t1[i].name != NULL; i++) {
+ if(off + t1[i].len <= ctx->size) {
+ if(md_ascii_case_eq(STR(off), t1[i].name, t1[i].len))
+ return 1;
+ }
+ }
+
+ /* Check for type 2: <!-- */
+ if(off + 3 < ctx->size && CH(off) == _T('!') && CH(off+1) == _T('-') && CH(off+2) == _T('-'))
+ return 2;
+
+ /* Check for type 3: <? */
+ if(off < ctx->size && CH(off) == _T('?'))
+ return 3;
+
+ /* Check for type 4 or 5: <! */
+ if(off < ctx->size && CH(off) == _T('!')) {
+ /* Check for type 4: <! followed by uppercase letter. */
+ if(off + 1 < ctx->size && ISASCII(off+1))
+ return 4;
+
+ /* Check for type 5: <![CDATA[ */
+ if(off + 8 < ctx->size) {
+ if(md_ascii_eq(STR(off), _T("![CDATA["), 8))
+ return 5;
+ }
+ }
+
+ /* Check for type 6: Many possible starting tags listed above. */
+ if(off + 1 < ctx->size && (ISALPHA(off) || (CH(off) == _T('/') && ISALPHA(off+1)))) {
+ int slot;
+ const TAG* tags;
+
+ if(CH(off) == _T('/'))
+ off++;
+
+ slot = (ISUPPER(off) ? CH(off) - 'A' : CH(off) - 'a');
+ tags = map6[slot];
+
+ for(i = 0; tags[i].name != NULL; i++) {
+ if(off + tags[i].len <= ctx->size) {
+ if(md_ascii_case_eq(STR(off), tags[i].name, tags[i].len)) {
+ OFF tmp = off + tags[i].len;
+ if(tmp >= ctx->size)
+ return 6;
+ if(ISBLANK(tmp) || ISNEWLINE(tmp) || CH(tmp) == _T('>'))
+ return 6;
+ if(tmp+1 < ctx->size && CH(tmp) == _T('/') && CH(tmp+1) == _T('>'))
+ return 6;
+ break;
+ }
+ }
+ }
+ }
+
+ /* Check for type 7: any COMPLETE other opening or closing tag. */
+ if(off + 1 < ctx->size) {
+ OFF end;
+
+ if(md_is_html_tag(ctx, NULL, 0, beg, ctx->size, &end)) {
+ /* Only optional whitespace and new line may follow. */
+ while(end < ctx->size && ISWHITESPACE(end))
+ end++;
+ if(end >= ctx->size || ISNEWLINE(end))
+ return 7;
+ }
+ }
+
+ return FALSE;
+}
+
+/* Case sensitive check whether there is a substring 'what' between 'beg'
+ * and end of line. */
+static int
+md_line_contains(MD_CTX* ctx, OFF beg, const CHAR* what, SZ what_len, OFF* p_end)
+{
+ OFF i;
+ for(i = beg; i + what_len < ctx->size; i++) {
+ if(ISNEWLINE(i))
+ break;
+ if(memcmp(STR(i), what, what_len * sizeof(CHAR)) == 0) {
+ *p_end = i + what_len;
+ return TRUE;
+ }
+ }
+
+ *p_end = i;
+ return FALSE;
+}
+
+/* Returns type of HTML block end condition or FALSE if not an end condition.
+ *
+ * Note it fills p_end even when it is not end condition as the caller
+ * does not need to analyze contents of a raw HTML block.
+ */
+static int
+md_is_html_block_end_condition(MD_CTX* ctx, OFF beg, OFF* p_end)
+{
+ switch(ctx->html_block_type) {
+ case 1:
+ {
+ OFF off = beg;
+
+ while(off < ctx->size && !ISNEWLINE(off)) {
+ if(CH(off) == _T('<')) {
+ if(md_ascii_case_eq(STR(off), _T("</script>"), 9)) {
+ *p_end = off + 9;
+ return TRUE;
+ }
+
+ if(md_ascii_case_eq(STR(off), _T("</style>"), 8)) {
+ *p_end = off + 8;
+ return TRUE;
+ }
+
+ if(md_ascii_case_eq(STR(off), _T("</pre>"), 6)) {
+ *p_end = off + 6;
+ return TRUE;
+ }
+ }
+
+ off++;
+ }
+ *p_end = off;
+ return FALSE;
+ }
+
+ case 2:
+ return (md_line_contains(ctx, beg, _T("-->"), 3, p_end) ? 2 : FALSE);
+
+ case 3:
+ return (md_line_contains(ctx, beg, _T("?>"), 2, p_end) ? 3 : FALSE);
+
+ case 4:
+ return (md_line_contains(ctx, beg, _T(">"), 1, p_end) ? 4 : FALSE);
+
+ case 5:
+ return (md_line_contains(ctx, beg, _T("]]>"), 3, p_end) ? 5 : FALSE);
+
+ case 6: /* Pass through */
+ case 7:
+ *p_end = beg;
+ return (ISNEWLINE(beg) ? ctx->html_block_type : FALSE);
+
+ default:
+ MD_UNREACHABLE();
+ }
+ return FALSE;
+}
+
+
+static int
+md_is_container_compatible(const MD_CONTAINER* pivot, const MD_CONTAINER* container)
+{
+ /* Block quote has no "items" like lists. */
+ if(container->ch == _T('>'))
+ return FALSE;
+
+ if(container->ch != pivot->ch)
+ return FALSE;
+ if(container->mark_indent > pivot->contents_indent)
+ return FALSE;
+
+ return TRUE;
+}
+
+static int
+md_push_container(MD_CTX* ctx, const MD_CONTAINER* container)
+{
+ if(ctx->n_containers >= ctx->alloc_containers) {
+ MD_CONTAINER* new_containers;
+
+ ctx->alloc_containers = (ctx->alloc_containers > 0
+ ? ctx->alloc_containers + ctx->alloc_containers / 2
+ : 16);
+ new_containers = realloc(ctx->containers, ctx->alloc_containers * sizeof(MD_CONTAINER));
+ if(new_containers == NULL) {
+ MD_LOG("realloc() failed.");
+ return -1;
+ }
+
+ ctx->containers = new_containers;
+ }
+
+ memcpy(&ctx->containers[ctx->n_containers++], container, sizeof(MD_CONTAINER));
+ return 0;
+}
+
+static int
+md_enter_child_containers(MD_CTX* ctx, int n_children)
+{
+ int i;
+ int ret = 0;
+
+ for(i = ctx->n_containers - n_children; i < ctx->n_containers; i++) {
+ MD_CONTAINER* c = &ctx->containers[i];
+ int is_ordered_list = FALSE;
+
+ switch(c->ch) {
+ case _T(')'):
+ case _T('.'):
+ is_ordered_list = TRUE;
+ MD_FALLTHROUGH();
+
+ case _T('-'):
+ case _T('+'):
+ case _T('*'):
+ /* Remember offset in ctx->block_bytes so we can revisit the
+ * block if we detect it is a loose list. */
+ md_end_current_block(ctx);
+ c->block_byte_off = ctx->n_block_bytes;
+
+ MD_CHECK(md_push_container_bytes(ctx,
+ (is_ordered_list ? MD_BLOCK_OL : MD_BLOCK_UL),
+ c->start, c->ch, MD_BLOCK_CONTAINER_OPENER));
+ MD_CHECK(md_push_container_bytes(ctx, MD_BLOCK_LI,
+ c->task_mark_off,
+ (c->is_task ? CH(c->task_mark_off) : 0),
+ MD_BLOCK_CONTAINER_OPENER));
+ break;
+
+ case _T('>'):
+ MD_CHECK(md_push_container_bytes(ctx, MD_BLOCK_QUOTE, 0, 0, MD_BLOCK_CONTAINER_OPENER));
+ break;
+
+ default:
+ MD_UNREACHABLE();
+ break;
+ }
+ }
+
+abort:
+ return ret;
+}
+
+static int
+md_leave_child_containers(MD_CTX* ctx, int n_keep)
+{
+ int ret = 0;
+
+ while(ctx->n_containers > n_keep) {
+ MD_CONTAINER* c = &ctx->containers[ctx->n_containers-1];
+ int is_ordered_list = FALSE;
+
+ switch(c->ch) {
+ case _T(')'):
+ case _T('.'):
+ is_ordered_list = TRUE;
+ MD_FALLTHROUGH();
+
+ case _T('-'):
+ case _T('+'):
+ case _T('*'):
+ MD_CHECK(md_push_container_bytes(ctx, MD_BLOCK_LI,
+ c->task_mark_off, (c->is_task ? CH(c->task_mark_off) : 0),
+ MD_BLOCK_CONTAINER_CLOSER));
+ MD_CHECK(md_push_container_bytes(ctx,
+ (is_ordered_list ? MD_BLOCK_OL : MD_BLOCK_UL), 0,
+ c->ch, MD_BLOCK_CONTAINER_CLOSER));
+ break;
+
+ case _T('>'):
+ MD_CHECK(md_push_container_bytes(ctx, MD_BLOCK_QUOTE, 0,
+ 0, MD_BLOCK_CONTAINER_CLOSER));
+ break;
+
+ default:
+ MD_UNREACHABLE();
+ break;
+ }
+
+ ctx->n_containers--;
+ }
+
+abort:
+ return ret;
+}
+
+static int
+md_is_container_mark(MD_CTX* ctx, unsigned indent, OFF beg, OFF* p_end, MD_CONTAINER* p_container)
+{
+ OFF off = beg;
+ OFF max_end;
+
+ if(off >= ctx->size || indent >= ctx->code_indent_offset)
+ return FALSE;
+
+ /* Check for block quote mark. */
+ if(CH(off) == _T('>')) {
+ off++;
+ p_container->ch = _T('>');
+ p_container->is_loose = FALSE;
+ p_container->is_task = FALSE;
+ p_container->mark_indent = indent;
+ p_container->contents_indent = indent + 1;
+ *p_end = off;
+ return TRUE;
+ }
+
+ /* Check for list item bullet mark. */
+ if(ISANYOF(off, _T("-+*")) && (off+1 >= ctx->size || ISBLANK(off+1) || ISNEWLINE(off+1))) {
+ p_container->ch = CH(off);
+ p_container->is_loose = FALSE;
+ p_container->is_task = FALSE;
+ p_container->mark_indent = indent;
+ p_container->contents_indent = indent + 1;
+ *p_end = off+1;
+ return TRUE;
+ }
+
+ /* Check for ordered list item marks. */
+ max_end = off + 9;
+ if(max_end > ctx->size)
+ max_end = ctx->size;
+ p_container->start = 0;
+ while(off < max_end && ISDIGIT(off)) {
+ p_container->start = p_container->start * 10 + CH(off) - _T('0');
+ off++;
+ }
+ if(off > beg &&
+ (CH(off) == _T('.') || CH(off) == _T(')')) &&
+ (off+1 >= ctx->size || ISBLANK(off+1) || ISNEWLINE(off+1)))
+ {
+ p_container->ch = CH(off);
+ p_container->is_loose = FALSE;
+ p_container->is_task = FALSE;
+ p_container->mark_indent = indent;
+ p_container->contents_indent = indent + off - beg + 1;
+ *p_end = off+1;
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static unsigned
+md_line_indentation(MD_CTX* ctx, unsigned total_indent, OFF beg, OFF* p_end)
+{
+ OFF off = beg;
+ unsigned indent = total_indent;
+
+ while(off < ctx->size && ISBLANK(off)) {
+ if(CH(off) == _T('\t'))
+ indent = (indent + 4) & ~3;
+ else
+ indent++;
+ off++;
+ }
+
+ *p_end = off;
+ return indent - total_indent;
+}
+
+static const MD_LINE_ANALYSIS md_dummy_blank_line = { MD_LINE_BLANK, 0, 0, 0, 0 };
+
+/* Analyze type of the line and find some its properties. This serves as a
+ * main input for determining type and boundaries of a block. */
+static int
+md_analyze_line(MD_CTX* ctx, OFF beg, OFF* p_end,
+ const MD_LINE_ANALYSIS* pivot_line, MD_LINE_ANALYSIS* line)
+{
+ unsigned total_indent = 0;
+ int n_parents = 0;
+ int n_brothers = 0;
+ int n_children = 0;
+ MD_CONTAINER container = { 0 };
+ int prev_line_has_list_loosening_effect = ctx->last_line_has_list_loosening_effect;
+ OFF off = beg;
+ OFF hr_killer = 0;
+ int ret = 0;
+
+ line->indent = md_line_indentation(ctx, total_indent, off, &off);
+ total_indent += line->indent;
+ line->beg = off;
+
+ /* Given the indentation and block quote marks '>', determine how many of
+ * the current containers are our parents. */
+ while(n_parents < ctx->n_containers) {
+ MD_CONTAINER* c = &ctx->containers[n_parents];
+
+ if(c->ch == _T('>') && line->indent < ctx->code_indent_offset &&
+ off < ctx->size && CH(off) == _T('>'))
+ {
+ /* Block quote mark. */
+ off++;
+ total_indent++;
+ line->indent = md_line_indentation(ctx, total_indent, off, &off);
+ total_indent += line->indent;
+
+ /* The optional 1st space after '>' is part of the block quote mark. */
+ if(line->indent > 0)
+ line->indent--;
+
+ line->beg = off;
+
+ } else if(c->ch != _T('>') && line->indent >= c->contents_indent) {
+ /* List. */
+ line->indent -= c->contents_indent;
+ } else {
+ break;
+ }
+
+ n_parents++;
+ }
+
+ if(off >= ctx->size || ISNEWLINE(off)) {
+ /* Blank line does not need any real indentation to be nested inside
+ * a list. */
+ if(n_brothers + n_children == 0) {
+ while(n_parents < ctx->n_containers && ctx->containers[n_parents].ch != _T('>'))
+ n_parents++;
+ }
+ }
+
+ while(TRUE) {
+ /* Check whether we are fenced code continuation. */
+ if(pivot_line->type == MD_LINE_FENCEDCODE) {
+ line->beg = off;
+
+ /* We are another MD_LINE_FENCEDCODE unless we are closing fence
+ * which we transform into MD_LINE_BLANK. */
+ if(line->indent < ctx->code_indent_offset) {
+ if(md_is_closing_code_fence(ctx, CH(pivot_line->beg), off, &off)) {
+ line->type = MD_LINE_BLANK;
+ ctx->last_line_has_list_loosening_effect = FALSE;
+ break;
+ }
+ }
+
+ /* Change indentation accordingly to the initial code fence. */
+ if(n_parents == ctx->n_containers) {
+ if(line->indent > pivot_line->indent)
+ line->indent -= pivot_line->indent;
+ else
+ line->indent = 0;
+
+ line->type = MD_LINE_FENCEDCODE;
+ break;
+ }
+ }
+
+ /* Check whether we are HTML block continuation. */
+ if(pivot_line->type == MD_LINE_HTML && ctx->html_block_type > 0) {
+ if(n_parents < ctx->n_containers) {
+ /* HTML block is implicitly ended if the enclosing container
+ * block ends. */
+ ctx->html_block_type = 0;
+ } else {
+ int html_block_type;
+
+ html_block_type = md_is_html_block_end_condition(ctx, off, &off);
+ if(html_block_type > 0) {
+ MD_ASSERT(html_block_type == ctx->html_block_type);
+
+ /* Make sure this is the last line of the block. */
+ ctx->html_block_type = 0;
+
+ /* Some end conditions serve as blank lines at the same time. */
+ if(html_block_type == 6 || html_block_type == 7) {
+ line->type = MD_LINE_BLANK;
+ line->indent = 0;
+ break;
+ }
+ }
+
+ line->type = MD_LINE_HTML;
+ n_parents = ctx->n_containers;
+ break;
+ }
+ }
+
+ /* Check for blank line. */
+ if(off >= ctx->size || ISNEWLINE(off)) {
+ if(pivot_line->type == MD_LINE_INDENTEDCODE && n_parents == ctx->n_containers) {
+ line->type = MD_LINE_INDENTEDCODE;
+ if(line->indent > ctx->code_indent_offset)
+ line->indent -= ctx->code_indent_offset;
+ else
+ line->indent = 0;
+ ctx->last_line_has_list_loosening_effect = FALSE;
+ } else {
+ line->type = MD_LINE_BLANK;
+ ctx->last_line_has_list_loosening_effect = (n_parents > 0 &&
+ n_brothers + n_children == 0 &&
+ ctx->containers[n_parents-1].ch != _T('>'));
+
+ #if 1
+ /* See https://github.com/mity/md4c/issues/6
+ *
+ * This ugly checking tests we are in (yet empty) list item but
+ * not its very first line (i.e. not the line with the list
+ * item mark).
+ *
+ * If we are such a blank line, then any following non-blank
+ * line which would be part of the list item actually has to
+ * end the list because according to the specification, "a list
+ * item can begin with at most one blank line."
+ */
+ if(n_parents > 0 && ctx->containers[n_parents-1].ch != _T('>') &&
+ n_brothers + n_children == 0 && ctx->current_block == NULL &&
+ ctx->n_block_bytes > (int) sizeof(MD_BLOCK))
+ {
+ MD_BLOCK* top_block = (MD_BLOCK*) ((char*)ctx->block_bytes + ctx->n_block_bytes - sizeof(MD_BLOCK));
+ if(top_block->type == MD_BLOCK_LI)
+ ctx->last_list_item_starts_with_two_blank_lines = TRUE;
+ }
+ #endif
+ }
+ break;
+ } else {
+ #if 1
+ /* This is the 2nd half of the hack. If the flag is set (i.e. there
+ * was a 2nd blank line at the beginning of the list item) and if
+ * we would otherwise still belong to the list item, we enforce
+ * the end of the list. */
+ ctx->last_line_has_list_loosening_effect = FALSE;
+ if(ctx->last_list_item_starts_with_two_blank_lines) {
+ if(n_parents > 0 && ctx->containers[n_parents-1].ch != _T('>') &&
+ n_brothers + n_children == 0 && ctx->current_block == NULL &&
+ ctx->n_block_bytes > (int) sizeof(MD_BLOCK))
+ {
+ MD_BLOCK* top_block = (MD_BLOCK*) ((char*)ctx->block_bytes + ctx->n_block_bytes - sizeof(MD_BLOCK));
+ if(top_block->type == MD_BLOCK_LI)
+ n_parents--;
+ }
+
+ ctx->last_list_item_starts_with_two_blank_lines = FALSE;
+ }
+ #endif
+ }
+
+ /* Check whether we are Setext underline. */
+ if(line->indent < ctx->code_indent_offset && pivot_line->type == MD_LINE_TEXT
+ && off < ctx->size && ISANYOF2(off, _T('='), _T('-'))
+ && (n_parents == ctx->n_containers))
+ {
+ unsigned level;
+
+ if(md_is_setext_underline(ctx, off, &off, &level)) {
+ line->type = MD_LINE_SETEXTUNDERLINE;
+ line->data = level;
+ break;
+ }
+ }
+
+ /* Check for thematic break line. */
+ if(line->indent < ctx->code_indent_offset
+ && off < ctx->size && off >= hr_killer
+ && ISANYOF(off, _T("-_*")))
+ {
+ if(md_is_hr_line(ctx, off, &off, &hr_killer)) {
+ line->type = MD_LINE_HR;
+ break;
+ }
+ }
+
+ /* Check for "brother" container. I.e. whether we are another list item
+ * in already started list. */
+ if(n_parents < ctx->n_containers && n_brothers + n_children == 0) {
+ OFF tmp;
+
+ if(md_is_container_mark(ctx, line->indent, off, &tmp, &container) &&
+ md_is_container_compatible(&ctx->containers[n_parents], &container))
+ {
+ pivot_line = &md_dummy_blank_line;
+
+ off = tmp;
+
+ total_indent += container.contents_indent - container.mark_indent;
+ line->indent = md_line_indentation(ctx, total_indent, off, &off);
+ total_indent += line->indent;
+ line->beg = off;
+
+ /* Some of the following whitespace actually still belongs to the mark. */
+ if(off >= ctx->size || ISNEWLINE(off)) {
+ container.contents_indent++;
+ } else if(line->indent <= ctx->code_indent_offset) {
+ container.contents_indent += line->indent;
+ line->indent = 0;
+ } else {
+ container.contents_indent += 1;
+ line->indent--;
+ }
+
+ ctx->containers[n_parents].mark_indent = container.mark_indent;
+ ctx->containers[n_parents].contents_indent = container.contents_indent;
+
+ n_brothers++;
+ continue;
+ }
+ }
+
+ /* Check for indented code.
+ * Note indented code block cannot interrupt a paragraph. */
+ if(line->indent >= ctx->code_indent_offset &&
+ (pivot_line->type == MD_LINE_BLANK || pivot_line->type == MD_LINE_INDENTEDCODE))
+ {
+ line->type = MD_LINE_INDENTEDCODE;
+ MD_ASSERT(line->indent >= ctx->code_indent_offset);
+ line->indent -= ctx->code_indent_offset;
+ line->data = 0;
+ break;
+ }
+
+ /* Check for start of a new container block. */
+ if(line->indent < ctx->code_indent_offset &&
+ md_is_container_mark(ctx, line->indent, off, &off, &container))
+ {
+ if(pivot_line->type == MD_LINE_TEXT && n_parents == ctx->n_containers &&
+ (off >= ctx->size || ISNEWLINE(off)) && container.ch != _T('>'))
+ {
+ /* Noop. List mark followed by a blank line cannot interrupt a paragraph. */
+ } else if(pivot_line->type == MD_LINE_TEXT && n_parents == ctx->n_containers &&
+ ISANYOF2_(container.ch, _T('.'), _T(')')) && container.start != 1)
+ {
+ /* Noop. Ordered list cannot interrupt a paragraph unless the start index is 1. */
+ } else {
+ total_indent += container.contents_indent - container.mark_indent;
+ line->indent = md_line_indentation(ctx, total_indent, off, &off);
+ total_indent += line->indent;
+
+ line->beg = off;
+ line->data = container.ch;
+
+ /* Some of the following whitespace actually still belongs to the mark. */
+ if(off >= ctx->size || ISNEWLINE(off)) {
+ container.contents_indent++;
+ } else if(line->indent <= ctx->code_indent_offset) {
+ container.contents_indent += line->indent;
+ line->indent = 0;
+ } else {
+ container.contents_indent += 1;
+ line->indent--;
+ }
+
+ if(n_brothers + n_children == 0)
+ pivot_line = &md_dummy_blank_line;
+
+ if(n_children == 0)
+ MD_CHECK(md_leave_child_containers(ctx, n_parents + n_brothers));
+
+ n_children++;
+ MD_CHECK(md_push_container(ctx, &container));
+ continue;
+ }
+ }
+
+ /* Check whether we are table continuation. */
+ if(pivot_line->type == MD_LINE_TABLE && n_parents == ctx->n_containers) {
+ line->type = MD_LINE_TABLE;
+ break;
+ }
+
+ /* Check for ATX header. */
+ if(line->indent < ctx->code_indent_offset &&
+ off < ctx->size && CH(off) == _T('#'))
+ {
+ unsigned level;
+
+ if(md_is_atxheader_line(ctx, off, &line->beg, &off, &level)) {
+ line->type = MD_LINE_ATXHEADER;
+ line->data = level;
+ break;
+ }
+ }
+
+ /* Check whether we are starting code fence. */
+ if(off < ctx->size && ISANYOF2(off, _T('`'), _T('~'))) {
+ if(md_is_opening_code_fence(ctx, off, &off)) {
+ line->type = MD_LINE_FENCEDCODE;
+ line->data = 1;
+ break;
+ }
+ }
+
+ /* Check for start of raw HTML block. */
+ if(off < ctx->size && CH(off) == _T('<')
+ && !(ctx->parser.flags & MD_FLAG_NOHTMLBLOCKS))
+ {
+ ctx->html_block_type = md_is_html_block_start_condition(ctx, off);
+
+ /* HTML block type 7 cannot interrupt paragraph. */
+ if(ctx->html_block_type == 7 && pivot_line->type == MD_LINE_TEXT)
+ ctx->html_block_type = 0;
+
+ if(ctx->html_block_type > 0) {
+ /* The line itself also may immediately close the block. */
+ if(md_is_html_block_end_condition(ctx, off, &off) == ctx->html_block_type) {
+ /* Make sure this is the last line of the block. */
+ ctx->html_block_type = 0;
+ }
+
+ line->type = MD_LINE_HTML;
+ break;
+ }
+ }
+
+ /* Check for table underline. */
+ if((ctx->parser.flags & MD_FLAG_TABLES) && pivot_line->type == MD_LINE_TEXT
+ && off < ctx->size && ISANYOF3(off, _T('|'), _T('-'), _T(':'))
+ && n_parents == ctx->n_containers)
+ {
+ unsigned col_count;
+
+ if(ctx->current_block != NULL && ctx->current_block->n_lines == 1 &&
+ md_is_table_underline(ctx, off, &off, &col_count))
+ {
+ line->data = col_count;
+ line->type = MD_LINE_TABLEUNDERLINE;
+ break;
+ }
+ }
+
+ /* By default, we are normal text line. */
+ line->type = MD_LINE_TEXT;
+ if(pivot_line->type == MD_LINE_TEXT && n_brothers + n_children == 0) {
+ /* Lazy continuation. */
+ n_parents = ctx->n_containers;
+ }
+
+ /* Check for task mark. */
+ if((ctx->parser.flags & MD_FLAG_TASKLISTS) && n_brothers + n_children > 0 &&
+ ISANYOF_(ctx->containers[ctx->n_containers-1].ch, _T("-+*.)")))
+ {
+ OFF tmp = off;
+
+ while(tmp < ctx->size && tmp < off + 3 && ISBLANK(tmp))
+ tmp++;
+ if(tmp + 2 < ctx->size && CH(tmp) == _T('[') &&
+ ISANYOF(tmp+1, _T("xX ")) && CH(tmp+2) == _T(']') &&
+ (tmp + 3 == ctx->size || ISBLANK(tmp+3) || ISNEWLINE(tmp+3)))
+ {
+ MD_CONTAINER* task_container = (n_children > 0 ? &ctx->containers[ctx->n_containers-1] : &container);
+ task_container->is_task = TRUE;
+ task_container->task_mark_off = tmp + 1;
+ off = tmp + 3;
+ while(ISWHITESPACE(off))
+ off++;
+ line->beg = off;
+ }
+ }
+
+ break;
+ }
+
+ /* Scan for end of the line.
+ *
+ * Note this is quite a bottleneck of the parsing as we here iterate almost
+ * over compete document.
+ */
+#if defined __linux__ && !defined MD4C_USE_UTF16
+ /* Recent glibc versions have superbly optimized strcspn(), even using
+ * vectorization if available. */
+ if(ctx->doc_ends_with_newline && off < ctx->size) {
+ while(TRUE) {
+ off += (OFF) strcspn(STR(off), "\r\n");
+
+ /* strcspn() can stop on zero terminator; but that can appear
+ * anywhere in the Markfown input... */
+ if(CH(off) == _T('\0'))
+ off++;
+ else
+ break;
+ }
+ } else
+#endif
+ {
+ /* Optimization: Use some loop unrolling. */
+ while(off + 3 < ctx->size && !ISNEWLINE(off+0) && !ISNEWLINE(off+1)
+ && !ISNEWLINE(off+2) && !ISNEWLINE(off+3))
+ off += 4;
+ while(off < ctx->size && !ISNEWLINE(off))
+ off++;
+ }
+
+ /* Set end of the line. */
+ line->end = off;
+
+ /* But for ATX header, we should exclude the optional trailing mark. */
+ if(line->type == MD_LINE_ATXHEADER) {
+ OFF tmp = line->end;
+ while(tmp > line->beg && CH(tmp-1) == _T(' '))
+ tmp--;
+ while(tmp > line->beg && CH(tmp-1) == _T('#'))
+ tmp--;
+ if(tmp == line->beg || CH(tmp-1) == _T(' ') || (ctx->parser.flags & MD_FLAG_PERMISSIVEATXHEADERS))
+ line->end = tmp;
+ }
+
+ /* Trim trailing spaces. */
+ if(line->type != MD_LINE_INDENTEDCODE && line->type != MD_LINE_FENCEDCODE) {
+ while(line->end > line->beg && CH(line->end-1) == _T(' '))
+ line->end--;
+ }
+
+ /* Eat also the new line. */
+ if(off < ctx->size && CH(off) == _T('\r'))
+ off++;
+ if(off < ctx->size && CH(off) == _T('\n'))
+ off++;
+
+ *p_end = off;
+
+ /* If we belong to a list after seeing a blank line, the list is loose. */
+ if(prev_line_has_list_loosening_effect && line->type != MD_LINE_BLANK && n_parents + n_brothers > 0) {
+ MD_CONTAINER* c = &ctx->containers[n_parents + n_brothers - 1];
+ if(c->ch != _T('>')) {
+ MD_BLOCK* block = (MD_BLOCK*) (((char*)ctx->block_bytes) + c->block_byte_off);
+ block->flags |= MD_BLOCK_LOOSE_LIST;
+ }
+ }
+
+ /* Leave any containers we are not part of anymore. */
+ if(n_children == 0 && n_parents + n_brothers < ctx->n_containers)
+ MD_CHECK(md_leave_child_containers(ctx, n_parents + n_brothers));
+
+ /* Enter any container we found a mark for. */
+ if(n_brothers > 0) {
+ MD_ASSERT(n_brothers == 1);
+ MD_CHECK(md_push_container_bytes(ctx, MD_BLOCK_LI,
+ ctx->containers[n_parents].task_mark_off,
+ (ctx->containers[n_parents].is_task ? CH(ctx->containers[n_parents].task_mark_off) : 0),
+ MD_BLOCK_CONTAINER_CLOSER));
+ MD_CHECK(md_push_container_bytes(ctx, MD_BLOCK_LI,
+ container.task_mark_off,
+ (container.is_task ? CH(container.task_mark_off) : 0),
+ MD_BLOCK_CONTAINER_OPENER));
+ ctx->containers[n_parents].is_task = container.is_task;
+ ctx->containers[n_parents].task_mark_off = container.task_mark_off;
+ }
+
+ if(n_children > 0)
+ MD_CHECK(md_enter_child_containers(ctx, n_children));
+
+abort:
+ return ret;
+}
+
+static int
+md_process_line(MD_CTX* ctx, const MD_LINE_ANALYSIS** p_pivot_line, MD_LINE_ANALYSIS* line)
+{
+ const MD_LINE_ANALYSIS* pivot_line = *p_pivot_line;
+ int ret = 0;
+
+ /* Blank line ends current leaf block. */
+ if(line->type == MD_LINE_BLANK) {
+ MD_CHECK(md_end_current_block(ctx));
+ *p_pivot_line = &md_dummy_blank_line;
+ return 0;
+ }
+
+ /* Some line types form block on their own. */
+ if(line->type == MD_LINE_HR || line->type == MD_LINE_ATXHEADER) {
+ MD_CHECK(md_end_current_block(ctx));
+
+ /* Add our single-line block. */
+ MD_CHECK(md_start_new_block(ctx, line));
+ MD_CHECK(md_add_line_into_current_block(ctx, line));
+ MD_CHECK(md_end_current_block(ctx));
+ *p_pivot_line = &md_dummy_blank_line;
+ return 0;
+ }
+
+ /* MD_LINE_SETEXTUNDERLINE changes meaning of the current block and ends it. */
+ if(line->type == MD_LINE_SETEXTUNDERLINE) {
+ MD_ASSERT(ctx->current_block != NULL);
+ ctx->current_block->type = MD_BLOCK_H;
+ ctx->current_block->data = line->data;
+ ctx->current_block->flags |= MD_BLOCK_SETEXT_HEADER;
+ MD_CHECK(md_add_line_into_current_block(ctx, line));
+ MD_CHECK(md_end_current_block(ctx));
+ if(ctx->current_block == NULL) {
+ *p_pivot_line = &md_dummy_blank_line;
+ } else {
+ /* This happens if we have consumed all the body as link ref. defs.
+ * and downgraded the underline into start of a new paragraph block. */
+ line->type = MD_LINE_TEXT;
+ *p_pivot_line = line;
+ }
+ return 0;
+ }
+
+ /* MD_LINE_TABLEUNDERLINE changes meaning of the current block. */
+ if(line->type == MD_LINE_TABLEUNDERLINE) {
+ MD_ASSERT(ctx->current_block != NULL);
+ MD_ASSERT(ctx->current_block->n_lines == 1);
+ ctx->current_block->type = MD_BLOCK_TABLE;
+ ctx->current_block->data = line->data;
+ MD_ASSERT(pivot_line != &md_dummy_blank_line);
+ ((MD_LINE_ANALYSIS*)pivot_line)->type = MD_LINE_TABLE;
+ MD_CHECK(md_add_line_into_current_block(ctx, line));
+ return 0;
+ }
+
+ /* The current block also ends if the line has different type. */
+ if(line->type != pivot_line->type)
+ MD_CHECK(md_end_current_block(ctx));
+
+ /* The current line may start a new block. */
+ if(ctx->current_block == NULL) {
+ MD_CHECK(md_start_new_block(ctx, line));
+ *p_pivot_line = line;
+ }
+
+ /* In all other cases the line is just a continuation of the current block. */
+ MD_CHECK(md_add_line_into_current_block(ctx, line));
+
+abort:
+ return ret;
+}
+
+static int
+md_process_doc(MD_CTX *ctx)
+{
+ const MD_LINE_ANALYSIS* pivot_line = &md_dummy_blank_line;
+ MD_LINE_ANALYSIS line_buf[2];
+ MD_LINE_ANALYSIS* line = &line_buf[0];
+ OFF off = 0;
+ int ret = 0;
+
+ MD_ENTER_BLOCK(MD_BLOCK_DOC, NULL);
+
+ while(off < ctx->size) {
+ if(line == pivot_line)
+ line = (line == &line_buf[0] ? &line_buf[1] : &line_buf[0]);
+
+ MD_CHECK(md_analyze_line(ctx, off, &off, pivot_line, line));
+ MD_CHECK(md_process_line(ctx, &pivot_line, line));
+ }
+
+ md_end_current_block(ctx);
+
+ MD_CHECK(md_build_ref_def_hashtable(ctx));
+
+ /* Process all blocks. */
+ MD_CHECK(md_leave_child_containers(ctx, 0));
+ MD_CHECK(md_process_all_blocks(ctx));
+
+ MD_LEAVE_BLOCK(MD_BLOCK_DOC, NULL);
+
+abort:
+
+#if 0
+ /* Output some memory consumption statistics. */
+ {
+ char buffer[256];
+ sprintf(buffer, "Alloced %u bytes for block buffer.",
+ (unsigned)(ctx->alloc_block_bytes));
+ MD_LOG(buffer);
+
+ sprintf(buffer, "Alloced %u bytes for containers buffer.",
+ (unsigned)(ctx->alloc_containers * sizeof(MD_CONTAINER)));
+ MD_LOG(buffer);
+
+ sprintf(buffer, "Alloced %u bytes for marks buffer.",
+ (unsigned)(ctx->alloc_marks * sizeof(MD_MARK)));
+ MD_LOG(buffer);
+
+ sprintf(buffer, "Alloced %u bytes for aux. buffer.",
+ (unsigned)(ctx->alloc_buffer * sizeof(MD_CHAR)));
+ MD_LOG(buffer);
+ }
+#endif
+
+ return ret;
+}
+
+
+/********************
+ *** Public API ***
+ ********************/
+
+int
+md_parse(const MD_CHAR* text, MD_SIZE size, const MD_PARSER* parser, void* userdata)
+{
+ MD_CTX ctx;
+ int i;
+ int ret;
+
+ if(parser->abi_version != 0) {
+ if(parser->debug_log != NULL)
+ parser->debug_log("Unsupported abi_version.", userdata);
+ return -1;
+ }
+
+ /* Setup context structure. */
+ memset(&ctx, 0, sizeof(MD_CTX));
+ ctx.text = text;
+ ctx.size = size;
+ memcpy(&ctx.parser, parser, sizeof(MD_PARSER));
+ ctx.userdata = userdata;
+ ctx.code_indent_offset = (ctx.parser.flags & MD_FLAG_NOINDENTEDCODEBLOCKS) ? (OFF)(-1) : 4;
+ md_build_mark_char_map(&ctx);
+ ctx.doc_ends_with_newline = (size > 0 && ISNEWLINE_(text[size-1]));
+
+ /* Reset all unresolved opener mark chains. */
+ for(i = 0; i < (int) SIZEOF_ARRAY(ctx.mark_chains); i++) {
+ ctx.mark_chains[i].head = -1;
+ ctx.mark_chains[i].tail = -1;
+ }
+ ctx.unresolved_link_head = -1;
+ ctx.unresolved_link_tail = -1;
+
+ /* All the work. */
+ ret = md_process_doc(&ctx);
+
+ /* Clean-up. */
+ md_free_ref_defs(&ctx);
+ md_free_ref_def_hashtable(&ctx);
+ free(ctx.buffer);
+ free(ctx.marks);
+ free(ctx.block_bytes);
+ free(ctx.containers);
+
+ return ret;
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-23 03:03:41 +0000