From 29f9921b919497be4d652ce963c8afbb2c1cd1e7 Mon Sep 17 00:00:00 2001 From: sanine Date: Sat, 26 Nov 2022 23:33:32 -0600 Subject: implement basic matrix parsing --- .gitignore | 1 + CMakeLists.txt | 21 + example/white-cube.dae | 126 ++++++ include/kalmia.h | 65 +++ src/CMakeLists.txt | 17 + src/ezxml/CMakeLists.txt | 4 + src/ezxml/ezxml.c | 1015 ++++++++++++++++++++++++++++++++++++++++++++++ src/ezxml/ezxml.h | 167 ++++++++ src/test/lily-test.c | 366 +++++++++++++++++ src/test/lily-test.h | 263 ++++++++++++ src/test/test.c | 7 + src/test/test.h | 15 + src/transform.c | 23 ++ src/transform.h | 6 + src/transform.test.c | 71 ++++ 15 files changed, 2167 insertions(+) create mode 100644 .gitignore create mode 100644 CMakeLists.txt create mode 100644 example/white-cube.dae create mode 100644 include/kalmia.h create mode 100644 src/CMakeLists.txt create mode 100644 src/ezxml/CMakeLists.txt create mode 100644 src/ezxml/ezxml.c create mode 100644 src/ezxml/ezxml.h create mode 100644 src/test/lily-test.c create mode 100644 src/test/lily-test.h create mode 100644 src/test/test.c create mode 100644 src/test/test.h create mode 100644 src/transform.c create mode 100644 src/transform.h create mode 100644 src/transform.test.c diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..378eac2 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +build diff --git a/CMakeLists.txt b/CMakeLists.txt new file mode 100644 index 0000000..bf3ca8a --- /dev/null +++ b/CMakeLists.txt @@ -0,0 +1,21 @@ +cmake_minimum_required(VERSION 3.13) +project(kalmia) + +option(KALMIA_BUILD_TESTS "Build the tests" ON) + +add_library(kalmia STATIC) +target_include_directories(kalmia PUBLIC include) +if (UNIX) + set_target_properties( + kalmia PROPERTIES + C_STANDARD 90 + CMAKE_C_FLAGS "-Wall -Wextra -Werror -Wfatal-errors -Wpedantic" + ) +endif() + +if (KALMIA_BUILD_TESTS) + add_executable(kalmia-tests) + target_link_libraries(kalmia-tests kalmia) +endif() + +add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/src) diff --git a/example/white-cube.dae b/example/white-cube.dae new file mode 100644 index 0000000..ddd1543 --- /dev/null +++ b/example/white-cube.dae @@ -0,0 +1,126 @@ + + + + 2005-11-14T02:16:38Z + 2005-11-15T11:36:38Z + 1.0 + + + + + + + + 1.0 1.0 1.0 1.0 + + + 1.0 1.0 1.0 1.0 + + + 1.0 1.0 1.0 1.0 + + + 1.0 1.0 1.0 1.0 + + + 20.0 + + + 1.0 1.0 1.0 1.0 + + + 0.5 + + + 1.0 1.0 1.0 1.0 + + + 1.0 + + + + + + + + + + + + + + + + + -0.5 0.5 0.5 + 0.5 0.5 0.5 + -0.5 -0.5 0.5 + 0.5 -0.5 0.5 + -0.5 0.5 -0.5 + 0.5 0.5 -0.5 + -0.5 -0.5 -0.5 + 0.5 -0.5 -0.5 + + + + + + + + + + + + 1.0 0.0 0.0 + -1.0 0.0 0.0 + 0.0 1.0 0.0 + 0.0 -1.0 0.0 + 0.0 0.0 1.0 + 0.0 0.0 -1.0 + + + + + + + + + + + + + + + +

0 4 2 4 3 4 1 4

+

0 2 1 2 5 2 4 2

+

6 3 7 3 3 3 2 3

+

0 1 4 1 6 1 2 1

+

3 0 7 0 5 0 1 0

+

5 5 7 5 6 5 4 5

+ + + + + + + + 0 0 0 + 0 0 1 0 + 0 1 0 0 + 1 0 0 0 + 1 1 1 + + + + + + + + + + + + + + diff --git a/include/kalmia.h b/include/kalmia.h new file mode 100644 index 0000000..d01fb5d --- /dev/null +++ b/include/kalmia.h @@ -0,0 +1,65 @@ +/**************************************************************** + * + * ======== kalmia ======== + * + * a COLLADA importer library + * copyright (c) 2022 kate swanson (sanine) + * + * This is anti-capitalist software, released for free use by individuals and + * organizations that do not operate by capitalist principles. + * + * Permission is hereby granted, free of charge, to any person or + * organization (the "User") obtaining a copy of this software and associated + * documentation files (the "Software"), to use, copy, modify, merge, + * distribute, and/or sell copies of the Software, subject to the following + * conditions: + * + * 1. The above copyright notice and this permission notice shall be included + * in all copies or modified versions of the Software. + * + * 2. The User is one of the following: + * a. An individual person, laboring for themselves + * b. A non-profit organization + * c. An educational institution + * d. An organization that seeks shared profit for all of its members, and + * allows non-members to set the cost of their labor + * + * 3. If the User is an organization with owners, then all owners are workers + * and all workers are owners with equal equity and/or equal vote. + * + * 4. If the User is an organization, then the User is not law enforcement or + * military, or working for or under either. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT EXPRESS OR IMPLIED WARRANTY OF + * ANY KIND, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS 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. + * + * https://anticapitalist.software/ + * https://sanine.net + * + ****************************************************************/ + +#ifndef KALMIA_H +#define KALMIA_H + +/* kalmia uses semantic versioning (semver.org) */ +#define KALMIA_VERSION_MAJOR 0 +#define KALMIA_VERSION_MINOR 0 +#define KALMIA_VERSION_PATCH 0 + + +/* internal buffer size for strings/sids */ +#ifndef KA_BUF_SIZE +#define KA_BUF_SIZE 128 +#endif + + +/* format data structures */ + +typedef double ka_matrix_t[16]; + + +#endif diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt new file mode 100644 index 0000000..a9067ca --- /dev/null +++ b/src/CMakeLists.txt @@ -0,0 +1,17 @@ +project(kalmia) + +target_sources(kalmia PUBLIC transform.c) +target_include_directories(kalmia PUBLIC ezxml) +target_link_libraries(kalmia ezxml) + +add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/ezxml) + +if (KALMIA_BUILD_TESTS) + target_sources( + kalmia-tests PUBLIC + test/lily-test.c + test/test.c + + transform.test.c + ) +endif() diff --git a/src/ezxml/CMakeLists.txt b/src/ezxml/CMakeLists.txt new file mode 100644 index 0000000..db024d9 --- /dev/null +++ b/src/ezxml/CMakeLists.txt @@ -0,0 +1,4 @@ +cmake_minimum_required(VERSION 3.2) +project(ezxml) + +add_library(ezxml STATIC ezxml.c) diff --git a/src/ezxml/ezxml.c b/src/ezxml/ezxml.c new file mode 100644 index 0000000..82b11fb --- /dev/null +++ b/src/ezxml/ezxml.c @@ -0,0 +1,1015 @@ +/* ezxml.c + * + * Copyright 2004-2006 Aaron Voisine + * + * 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 +#include +#include +#include +#include +#include +#include +#ifndef EZXML_NOMMAP +#include +#endif // EZXML_NOMMAP +#include +#include "ezxml.h" + +#define EZXML_WS "\t\r\n " // whitespace +#define EZXML_ERRL 128 // maximum error string length + +typedef struct ezxml_root *ezxml_root_t; +struct ezxml_root { // additional data for the root tag + struct ezxml xml; // is a super-struct built on top of ezxml struct + ezxml_t cur; // current xml tree insertion point + char *m; // original xml string + size_t len; // length of allocated memory for mmap, -1 for malloc + char *u; // UTF-8 conversion of string if original was UTF-16 + char *s; // start of work area + char *e; // end of work area + char **ent; // general entities (ampersand sequences) + char ***attr; // default attributes + char ***pi; // processing instructions + short standalone; // non-zero if + char err[EZXML_ERRL]; // error string +}; + +char *EZXML_NIL[] = { NULL }; // empty, null terminated array of strings + +// returns the first child tag with the given name or NULL if not found +ezxml_t ezxml_child(ezxml_t xml, const char *name) +{ + xml = (xml) ? xml->child : NULL; + while (xml && strcmp(name, xml->name)) xml = xml->sibling; + return xml; +} + +// returns the Nth tag with the same name in the same subsection or NULL if not +// found +ezxml_t ezxml_idx(ezxml_t xml, int idx) +{ + for (; xml && idx; idx--) xml = xml->next; + return xml; +} + +// returns the value of the requested tag attribute or NULL if not found +const char *ezxml_attr(ezxml_t xml, const char *attr) +{ + int i = 0, j = 1; + ezxml_root_t root = (ezxml_root_t)xml; + + if (! xml || ! xml->attr) return NULL; + while (xml->attr[i] && strcmp(attr, xml->attr[i])) i += 2; + if (xml->attr[i]) return xml->attr[i + 1]; // found attribute + + while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; // root tag + for (i = 0; root->attr[i] && strcmp(xml->name, root->attr[i][0]); i++); + if (! root->attr[i]) return NULL; // no matching default attributes + while (root->attr[i][j] && strcmp(attr, root->attr[i][j])) j += 3; + return (root->attr[i][j]) ? root->attr[i][j + 1] : NULL; // found default +} + +// same as ezxml_get but takes an already initialized va_list +ezxml_t ezxml_vget(ezxml_t xml, va_list ap) +{ + char *name = va_arg(ap, char *); + int idx = -1; + + if (name && *name) { + idx = va_arg(ap, int); + xml = ezxml_child(xml, name); + } + return (idx < 0) ? xml : ezxml_vget(ezxml_idx(xml, idx), ap); +} + +// Traverses the xml tree to retrieve a specific subtag. Takes a variable +// length list of tag names and indexes. The argument list must be terminated +// by either an index of -1 or an empty string tag name. Example: +// title = ezxml_get(library, "shelf", 0, "book", 2, "title", -1); +// This retrieves the title of the 3rd book on the 1st shelf of library. +// Returns NULL if not found. +ezxml_t ezxml_get(ezxml_t xml, ...) +{ + va_list ap; + ezxml_t r; + + va_start(ap, xml); + r = ezxml_vget(xml, ap); + va_end(ap); + return r; +} + +// returns a null terminated array of processing instructions for the given +// target +const char **ezxml_pi(ezxml_t xml, const char *target) +{ + ezxml_root_t root = (ezxml_root_t)xml; + int i = 0; + + if (! root) return (const char **)EZXML_NIL; + while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; // root tag + while (root->pi[i] && strcmp(target, root->pi[i][0])) i++; // find target + return (const char **)((root->pi[i]) ? root->pi[i] + 1 : EZXML_NIL); +} + +// set an error string and return root +ezxml_t ezxml_err(ezxml_root_t root, char *s, const char *err, ...) +{ + va_list ap; + int line = 1; + char *t, fmt[EZXML_ERRL]; + + for (t = root->s; t < s; t++) if (*t == '\n') line++; + snprintf(fmt, EZXML_ERRL, "[error near line %d]: %s", line, err); + + va_start(ap, err); + vsnprintf(root->err, EZXML_ERRL, fmt, ap); + va_end(ap); + + return &root->xml; +} + +// Recursively decodes entity and character references and normalizes new lines +// ent is a null terminated array of alternating entity names and values. set t +// to '&' for general entity decoding, '%' for parameter entity decoding, 'c' +// for cdata sections, ' ' for attribute normalization, or '*' for non-cdata +// attribute normalization. Returns s, or if the decoded string is longer than +// s, returns a malloced string that must be freed. +char *ezxml_decode(char *s, char **ent, char t) +{ + char *e, *r = s, *m = s; + long b, c, d, l; + + for (; *s; s++) { // normalize line endings + while (*s == '\r') { + *(s++) = '\n'; + if (*s == '\n') memmove(s, (s + 1), strlen(s)); + } + } + + for (s = r; ; ) { + while (*s && *s != '&' && (*s != '%' || t != '%') && !isspace(*s)) s++; + + if (! *s) break; + else if (t != 'c' && ! strncmp(s, "&#", 2)) { // character reference + if (s[2] == 'x') c = strtol(s + 3, &e, 16); // base 16 + else c = strtol(s + 2, &e, 10); // base 10 + if (! c || *e != ';') { s++; continue; } // not a character ref + + if (c < 0x80) *(s++) = c; // US-ASCII subset + else { // multi-byte UTF-8 sequence + for (b = 0, d = c; d; d /= 2) b++; // number of bits in c + b = (b - 2) / 5; // number of bytes in payload + *(s++) = (0xFF << (7 - b)) | (c >> (6 * b)); // head + while (b) *(s++) = 0x80 | ((c >> (6 * --b)) & 0x3F); // payload + } + + memmove(s, strchr(s, ';') + 1, strlen(strchr(s, ';'))); + } + else if ((*s == '&' && (t == '&' || t == ' ' || t == '*')) || + (*s == '%' && t == '%')) { // entity reference + for (b = 0; ent[b] && strncmp(s + 1, ent[b], strlen(ent[b])); + b += 2); // find entity in entity list + + if (ent[b++]) { // found a match + if ((c = strlen(ent[b])) - 1 > (e = strchr(s, ';')) - s) { + l = (d = (s - r)) + c + strlen(e); // new length + r = (r == m) ? strcpy(malloc(l), r) : realloc(r, l); + e = strchr((s = r + d), ';'); // fix up pointers + } + + memmove(s + c, e + 1, strlen(e)); // shift rest of string + strncpy(s, ent[b], c); // copy in replacement text + } + else s++; // not a known entity + } + else if ((t == ' ' || t == '*') && isspace(*s)) *(s++) = ' '; + else s++; // no decoding needed + } + + if (t == '*') { // normalize spaces for non-cdata attributes + for (s = r; *s; s++) { + if ((l = strspn(s, " "))) memmove(s, s + l, strlen(s + l) + 1); + while (*s && *s != ' ') s++; + } + if (--s >= r && *s == ' ') *s = '\0'; // trim any trailing space + } + return r; +} + +// called when parser finds start of new tag +void ezxml_open_tag(ezxml_root_t root, char *name, char **attr) +{ + ezxml_t xml = root->cur; + + if (xml->name) xml = ezxml_add_child(xml, name, strlen(xml->txt)); + else xml->name = name; // first open tag + + xml->attr = attr; + root->cur = xml; // update tag insertion point +} + +// called when parser finds character content between open and closing tag +void ezxml_char_content(ezxml_root_t root, char *s, size_t len, char t) +{ + ezxml_t xml = root->cur; + char *m = s; + size_t l; + + if (! xml || ! xml->name || ! len) return; // sanity check + + s[len] = '\0'; // null terminate text (calling functions anticipate this) + len = strlen(s = ezxml_decode(s, root->ent, t)) + 1; + + if (! *(xml->txt)) xml->txt = s; // initial character content + else { // allocate our own memory and make a copy + xml->txt = (xml->flags & EZXML_TXTM) // allocate some space + ? realloc(xml->txt, (l = strlen(xml->txt)) + len) + : strcpy(malloc((l = strlen(xml->txt)) + len), xml->txt); + strcpy(xml->txt + l, s); // add new char content + if (s != m) free(s); // free s if it was malloced by ezxml_decode() + } + + if (xml->txt != m) ezxml_set_flag(xml, EZXML_TXTM); +} + +// called when parser finds closing tag +ezxml_t ezxml_close_tag(ezxml_root_t root, char *name, char *s) +{ + if (! root->cur || ! root->cur->name || strcmp(name, root->cur->name)) + return ezxml_err(root, s, "unexpected closing tag ", name); + + root->cur = root->cur->parent; + return NULL; +} + +// checks for circular entity references, returns non-zero if no circular +// references are found, zero otherwise +int ezxml_ent_ok(char *name, char *s, char **ent) +{ + int i; + + for (; ; s++) { + while (*s && *s != '&') s++; // find next entity reference + if (! *s) return 1; + if (! strncmp(s + 1, name, strlen(name))) return 0; // circular ref. + for (i = 0; ent[i] && strncmp(ent[i], s + 1, strlen(ent[i])); i += 2); + if (ent[i] && ! ezxml_ent_ok(name, ent[i + 1], ent)) return 0; + } +} + +// called when the parser finds a processing instruction +void ezxml_proc_inst(ezxml_root_t root, char *s, size_t len) +{ + int i = 0, j = 1; + char *target = s; + + s[len] = '\0'; // null terminate instruction + if (*(s += strcspn(s, EZXML_WS))) { + *s = '\0'; // null terminate target + s += strspn(s + 1, EZXML_WS) + 1; // skip whitespace after target + } + + if (! strcmp(target, "xml")) { // + if ((s = strstr(s, "standalone")) && ! strncmp(s + strspn(s + 10, + EZXML_WS "='\"") + 10, "yes", 3)) root->standalone = 1; + return; + } + + if (! root->pi[0]) *(root->pi = malloc(sizeof(char **))) = NULL; //first pi + + while (root->pi[i] && strcmp(target, root->pi[i][0])) i++; // find target + if (! root->pi[i]) { // new target + root->pi = realloc(root->pi, sizeof(char **) * (i + 2)); + root->pi[i] = malloc(sizeof(char *) * 3); + root->pi[i][0] = target; + root->pi[i][1] = (char *)(root->pi[i + 1] = NULL); // terminate pi list + root->pi[i][2] = strdup(""); // empty document position list + } + + while (root->pi[i][j]) j++; // find end of instruction list for this target + root->pi[i] = realloc(root->pi[i], sizeof(char *) * (j + 3)); + root->pi[i][j + 2] = realloc(root->pi[i][j + 1], j + 1); + strcpy(root->pi[i][j + 2] + j - 1, (root->xml.name) ? ">" : "<"); + root->pi[i][j + 1] = NULL; // null terminate pi list for this target + root->pi[i][j] = s; // set instruction +} + +// called when the parser finds an internal doctype subset +short ezxml_internal_dtd(ezxml_root_t root, char *s, size_t len) +{ + char q, *c, *t, *n = NULL, *v, **ent, **pe; + int i, j; + + pe = memcpy(malloc(sizeof(EZXML_NIL)), EZXML_NIL, sizeof(EZXML_NIL)); + + for (s[len] = '\0'; s; ) { + while (*s && *s != '<' && *s != '%') s++; // find next declaration + + if (! *s) break; + else if (! strncmp(s, "'); + continue; + } + + for (i = 0, ent = (*c == '%') ? pe : root->ent; ent[i]; i++); + ent = realloc(ent, (i + 3) * sizeof(char *)); // space for next ent + if (*c == '%') pe = ent; + else root->ent = ent; + + *(++s) = '\0'; // null terminate name + if ((s = strchr(v, q))) *(s++) = '\0'; // null terminate value + ent[i + 1] = ezxml_decode(v, pe, '%'); // set value + ent[i + 2] = NULL; // null terminate entity list + if (! ezxml_ent_ok(n, ent[i + 1], ent)) { // circular reference + if (ent[i + 1] != v) free(ent[i + 1]); + ezxml_err(root, v, "circular entity declaration &%s", n); + break; + } + else ent[i] = n; // set entity name + } + else if (! strncmp(s, "")) == '>') continue; + else *s = '\0'; // null terminate tag name + for (i = 0; root->attr[i] && strcmp(n, root->attr[i][0]); i++); + + while (*(n = ++s + strspn(s, EZXML_WS)) && *n != '>') { + if (*(s = n + strcspn(n, EZXML_WS))) *s = '\0'; // attr name + else { ezxml_err(root, t, "malformed ") - 1; + if (*c == ' ') continue; // cdata is default, nothing to do + v = NULL; + } + else if ((*s == '"' || *s == '\'') && // default value + (s = strchr(v = s + 1, *s))) *s = '\0'; + else { ezxml_err(root, t, "malformed attr[i]) { // new tag name + root->attr = (! i) ? malloc(2 * sizeof(char **)) + : realloc(root->attr, + (i + 2) * sizeof(char **)); + root->attr[i] = malloc(2 * sizeof(char *)); + root->attr[i][0] = t; // set tag name + root->attr[i][1] = (char *)(root->attr[i + 1] = NULL); + } + + for (j = 1; root->attr[i][j]; j += 3); // find end of list + root->attr[i] = realloc(root->attr[i], + (j + 4) * sizeof(char *)); + + root->attr[i][j + 3] = NULL; // null terminate list + root->attr[i][j + 2] = c; // is it cdata? + root->attr[i][j + 1] = (v) ? ezxml_decode(v, root->ent, *c) + : NULL; + root->attr[i][j] = n; // attribute name + } + } + else if (! strncmp(s, ""); // comments + else if (! strncmp(s, ""))) + ezxml_proc_inst(root, c, s++ - c); + } + else if (*s == '<') s = strchr(s, '>'); // skip other declarations + else if (*(s++) == '%' && ! root->standalone) break; + } + + free(pe); + return ! *root->err; +} + +// Converts a UTF-16 string to UTF-8. Returns a new string that must be freed +// or NULL if no conversion was needed. +char *ezxml_str2utf8(char **s, size_t *len) +{ + char *u; + size_t l = 0, sl, max = *len; + long c, d; + int b, be = (**s == '\xFE') ? 1 : (**s == '\xFF') ? 0 : -1; + + if (be == -1) return NULL; // not UTF-16 + + u = malloc(max); + for (sl = 2; sl < *len - 1; sl += 2) { + c = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF) //UTF-16BE + : (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF); //UTF-16LE + if (c >= 0xD800 && c <= 0xDFFF && (sl += 2) < *len - 1) { // high-half + d = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF) + : (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF); + c = (((c & 0x3FF) << 10) | (d & 0x3FF)) + 0x10000; + } + + while (l + 6 > max) u = realloc(u, max += EZXML_BUFSIZE); + if (c < 0x80) u[l++] = c; // US-ASCII subset + else { // multi-byte UTF-8 sequence + for (b = 0, d = c; d; d /= 2) b++; // bits in c + b = (b - 2) / 5; // bytes in payload + u[l++] = (0xFF << (7 - b)) | (c >> (6 * b)); // head + while (b) u[l++] = 0x80 | ((c >> (6 * --b)) & 0x3F); // payload + } + } + return *s = realloc(u, *len = l); +} + +// frees a tag attribute list +void ezxml_free_attr(char **attr) { + int i = 0; + char *m; + + if (! attr || attr == EZXML_NIL) return; // nothing to free + while (attr[i]) i += 2; // find end of attribute list + m = attr[i + 1]; // list of which names and values are malloced + for (i = 0; m[i]; i++) { + if (m[i] & EZXML_NAMEM) free(attr[i * 2]); + if (m[i] & EZXML_TXTM) free(attr[(i * 2) + 1]); + } + free(m); + free(attr); +} + +// parse the given xml string and return an ezxml structure +ezxml_t ezxml_parse_str(char *s, size_t len) +{ + ezxml_root_t root = (ezxml_root_t)ezxml_new(NULL); + char q, e, *d, **attr, **a = NULL; // initialize a to avoid compile warning + int l, i, j; + + root->m = s; + if (! len) return ezxml_err(root, NULL, "root tag missing"); + root->u = ezxml_str2utf8(&s, &len); // convert utf-16 to utf-8 + root->e = (root->s = s) + len; // record start and end of work area + + e = s[len - 1]; // save end char + s[len - 1] = '\0'; // turn end char into null terminator + + while (*s && *s != '<') s++; // find first tag + if (! *s) return ezxml_err(root, s, "root tag missing"); + + for (; ; ) { + attr = (char **)EZXML_NIL; + d = ++s; + + if (isalpha(*s) || *s == '_' || *s == ':' || *s < '\0') { // new tag + if (! root->cur) + return ezxml_err(root, d, "markup outside of root element"); + + s += strcspn(s, EZXML_WS "/>"); + while (isspace(*s)) *(s++) = '\0'; // null terminate tag name + + if (*s && *s != '/' && *s != '>') // find tag in default attr list + for (i = 0; (a = root->attr[i]) && strcmp(a[0], d); i++); + + for (l = 0; *s && *s != '/' && *s != '>'; l += 2) { // new attrib + attr = (l) ? realloc(attr, (l + 4) * sizeof(char *)) + : malloc(4 * sizeof(char *)); // allocate space + attr[l + 3] = (l) ? realloc(attr[l + 1], (l / 2) + 2) + : malloc(2); // mem for list of maloced vals + strcpy(attr[l + 3] + (l / 2), " "); // value is not malloced + attr[l + 2] = NULL; // null terminate list + attr[l + 1] = ""; // temporary attribute value + attr[l] = s; // set attribute name + + s += strcspn(s, EZXML_WS "=/>"); + if (*s == '=' || isspace(*s)) { + *(s++) = '\0'; // null terminate tag attribute name + q = *(s += strspn(s, EZXML_WS "=")); + if (q == '"' || q == '\'') { // attribute value + attr[l + 1] = ++s; + while (*s && *s != q) s++; + if (*s) *(s++) = '\0'; // null terminate attribute val + else { + ezxml_free_attr(attr); + return ezxml_err(root, d, "missing %c", q); + } + + for (j = 1; a && a[j] && strcmp(a[j], attr[l]); j +=3); + attr[l + 1] = ezxml_decode(attr[l + 1], root->ent, (a + && a[j]) ? *a[j + 2] : ' '); + if (attr[l + 1] < d || attr[l + 1] > s) + attr[l + 3][l / 2] = EZXML_TXTM; // value malloced + } + } + while (isspace(*s)) s++; + } + + if (*s == '/') { // self closing tag + *(s++) = '\0'; + if ((*s && *s != '>') || (! *s && e != '>')) { + if (l) ezxml_free_attr(attr); + return ezxml_err(root, d, "missing >"); + } + ezxml_open_tag(root, d, attr); + ezxml_close_tag(root, d, s); + } + else if ((q = *s) == '>' || (! *s && e == '>')) { // open tag + *s = '\0'; // temporarily null terminate tag name + ezxml_open_tag(root, d, attr); + *s = q; + } + else { + if (l) ezxml_free_attr(attr); + return ezxml_err(root, d, "missing >"); + } + } + else if (*s == '/') { // close tag + s += strcspn(d = s + 1, EZXML_WS ">") + 1; + if (! (q = *s) && e != '>') return ezxml_err(root, d, "missing >"); + *s = '\0'; // temporarily null terminate tag name + if (ezxml_close_tag(root, d, s)) return &root->xml; + if (isspace(*s = q)) s += strspn(s, EZXML_WS); + } + else if (! strncmp(s, "!--", 3)) { // xml comment + if (! (s = strstr(s + 3, "--")) || (*(s += 2) != '>' && *s) || + (! *s && e != '>')) return ezxml_err(root, d, "unclosed