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Diffstat (limited to 'src/ezxml/ezxml.c')
| -rw-r--r-- | src/ezxml/ezxml.c | 1015 |
1 files changed, 0 insertions, 1015 deletions
diff --git a/src/ezxml/ezxml.c b/src/ezxml/ezxml.c deleted file mode 100644 index 82b11fb..0000000 --- a/src/ezxml/ezxml.c +++ /dev/null @@ -1,1015 +0,0 @@ -/* ezxml.c - * - * Copyright 2004-2006 Aaron Voisine <aaron@voisine.org> - * - * 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 <stdlib.h> -#include <stdio.h> -#include <stdarg.h> -#include <string.h> -#include <ctype.h> -#include <unistd.h> -#include <sys/types.h> -#ifndef EZXML_NOMMAP -#include <sys/mman.h> -#endif // EZXML_NOMMAP -#include <sys/stat.h> -#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 <?xml standalone="yes"?> - 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 </%s>", 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")) { // <?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, "<!ENTITY", 8)) { // parse entity definitions - c = s += strspn(s + 8, EZXML_WS) + 8; // skip white space separator - n = s + strspn(s, EZXML_WS "%"); // find name - *(s = n + strcspn(n, EZXML_WS)) = ';'; // append ; to name - - v = s + strspn(s + 1, EZXML_WS) + 1; // find value - if ((q = *(v++)) != '"' && q != '\'') { // skip externals - s = strchr(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, "<!ATTLIST", 9)) { // parse default attributes - t = s + strspn(s + 9, EZXML_WS) + 9; // skip whitespace separator - if (! *t) { ezxml_err(root, t, "unclosed <!ATTLIST"); break; } - if (*(s = t + strcspn(t, EZXML_WS ">")) == '>') 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 <!ATTLIST"); break; } - - s += strspn(s + 1, EZXML_WS) + 1; // find next token - c = (strncmp(s, "CDATA", 5)) ? "*" : " "; // is it cdata? - if (! strncmp(s, "NOTATION", 8)) - s += strspn(s + 8, EZXML_WS) + 8; - s = (*s == '(') ? strchr(s, ')') : s + strcspn(s, EZXML_WS); - if (! s) { ezxml_err(root, t, "malformed <!ATTLIST"); break; } - - s += strspn(s, EZXML_WS ")"); // skip white space separator - if (! strncmp(s, "#FIXED", 6)) - s += strspn(s + 6, EZXML_WS) + 6; - if (*s == '#') { // no default value - s += strcspn(s, EZXML_WS ">") - 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 <!ATTLIST"); break; } - - if (! root->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, "<!--", 4)) s = strstr(s + 4, "-->"); // comments - else if (! strncmp(s, "<?", 2)) { // processing instructions - if ((s = strstr(c = s + 2, "?>"))) - 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 <!--"); - } - else if (! strncmp(s, "![CDATA[", 8)) { // cdata - if ((s = strstr(s, "]]>"))) - ezxml_char_content(root, d + 8, (s += 2) - d - 10, 'c'); - else return ezxml_err(root, d, "unclosed <![CDATA["); - } - else if (! strncmp(s, "!DOCTYPE", 8)) { // dtd - for (l = 0; *s && ((! l && *s != '>') || (l && (*s != ']' || - *(s + strspn(s + 1, EZXML_WS) + 1) != '>'))); - l = (*s == '[') ? 1 : l) s += strcspn(s + 1, "[]>") + 1; - if (! *s && e != '>') - return ezxml_err(root, d, "unclosed <!DOCTYPE"); - d = (l) ? strchr(d, '[') + 1 : d; - if (l && ! ezxml_internal_dtd(root, d, s++ - d)) return &root->xml; - } - else if (*s == '?') { // <?...?> processing instructions - do { s = strchr(s, '?'); } while (s && *(++s) && *s != '>'); - if (! s || (! *s && e != '>')) - return ezxml_err(root, d, "unclosed <?"); - else ezxml_proc_inst(root, d + 1, s - d - 2); - } - else return ezxml_err(root, d, "unexpected <"); - - if (! s || ! *s) break; - *s = '\0'; - d = ++s; - if (*s && *s != '<') { // tag character content - while (*s && *s != '<') s++; - if (*s) ezxml_char_content(root, d, s - d, '&'); - else break; - } - else if (! *s) break; - } - - if (! root->cur) return &root->xml; - else if (! root->cur->name) return ezxml_err(root, d, "root tag missing"); - else return ezxml_err(root, d, "unclosed tag <%s>", root->cur->name); -} - -// Wrapper for ezxml_parse_str() that accepts a file stream. Reads the entire -// stream into memory and then parses it. For xml files, use ezxml_parse_file() -// or ezxml_parse_fd() -ezxml_t ezxml_parse_fp(FILE *fp) -{ - ezxml_root_t root; - size_t l, len = 0; - char *s; - - if (! (s = malloc(EZXML_BUFSIZE))) return NULL; - do { - len += (l = fread((s + len), 1, EZXML_BUFSIZE, fp)); - if (l == EZXML_BUFSIZE) s = realloc(s, len + EZXML_BUFSIZE); - } while (s && l == EZXML_BUFSIZE); - - if (! s) return NULL; - root = (ezxml_root_t)ezxml_parse_str(s, len); - root->len = -1; // so we know to free s in ezxml_free() - return &root->xml; -} - -// A wrapper for ezxml_parse_str() that accepts a file descriptor. First -// attempts to mem map the file. Failing that, reads the file into memory. -// Returns NULL on failure. -ezxml_t ezxml_parse_fd(int fd) -{ - ezxml_root_t root; - struct stat st; - size_t l; - void *m; - - if (fd < 0) return NULL; - fstat(fd, &st); - -#ifndef EZXML_NOMMAP - l = (st.st_size + sysconf(_SC_PAGESIZE) - 1) & ~(sysconf(_SC_PAGESIZE) -1); - if ((m = mmap(NULL, l, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0)) != - MAP_FAILED) { - madvise(m, l, MADV_SEQUENTIAL); // optimize for sequential access - root = (ezxml_root_t)ezxml_parse_str(m, st.st_size); - madvise(m, root->len = l, MADV_NORMAL); // put it back to normal - } - else { // mmap failed, read file into memory -#endif // EZXML_NOMMAP - l = read(fd, m = malloc(st.st_size), st.st_size); - root = (ezxml_root_t)ezxml_parse_str(m, l); - root->len = -1; // so we know to free s in ezxml_free() -#ifndef EZXML_NOMMAP - } -#endif // EZXML_NOMMAP - return &root->xml; -} - -// a wrapper for ezxml_parse_fd that accepts a file name -ezxml_t ezxml_parse_file(const char *file) -{ - int fd = open(file, O_RDONLY, 0); - ezxml_t xml = ezxml_parse_fd(fd); - - if (fd >= 0) close(fd); - return xml; -} - -// Encodes ampersand sequences appending the results to *dst, reallocating *dst -// if length excedes max. a is non-zero for attribute encoding. Returns *dst -char *ezxml_ampencode(const char *s, size_t len, char **dst, size_t *dlen, - size_t *max, short a) -{ - const char *e; - - for (e = s + len; s != e; s++) { - while (*dlen + 10 > *max) *dst = realloc(*dst, *max += EZXML_BUFSIZE); - - switch (*s) { - case '\0': return *dst; - case '&': *dlen += sprintf(*dst + *dlen, "&"); break; - case '<': *dlen += sprintf(*dst + *dlen, "<"); break; - case '>': *dlen += sprintf(*dst + *dlen, ">"); break; - case '"': *dlen += sprintf(*dst + *dlen, (a) ? """ : "\""); break; - case '\n': *dlen += sprintf(*dst + *dlen, (a) ? "
" : "\n"); break; - case '\t': *dlen += sprintf(*dst + *dlen, (a) ? "	" : "\t"); break; - case '\r': *dlen += sprintf(*dst + *dlen, "
"); break; - default: (*dst)[(*dlen)++] = *s; - } - } - return *dst; -} - -// Recursively converts each tag to xml appending it to *s. Reallocates *s if -// its length excedes max. start is the location of the previous tag in the -// parent tag's character content. Returns *s. -char *ezxml_toxml_r(ezxml_t xml, char **s, size_t *len, size_t *max, - size_t start, char ***attr) -{ - int i, j; - char *txt = (xml->parent) ? xml->parent->txt : ""; - size_t off = 0; - - // parent character content up to this tag - *s = ezxml_ampencode(txt + start, xml->off - start, s, len, max, 0); - - while (*len + strlen(xml->name) + 4 > *max) // reallocate s - *s = realloc(*s, *max += EZXML_BUFSIZE); - - *len += sprintf(*s + *len, "<%s", xml->name); // open tag - for (i = 0; xml->attr[i]; i += 2) { // tag attributes - if (ezxml_attr(xml, xml->attr[i]) != xml->attr[i + 1]) continue; - while (*len + strlen(xml->attr[i]) + 7 > *max) // reallocate s - *s = realloc(*s, *max += EZXML_BUFSIZE); - - *len += sprintf(*s + *len, " %s=\"", xml->attr[i]); - ezxml_ampencode(xml->attr[i + 1], -1, s, len, max, 1); - *len += sprintf(*s + *len, "\""); - } - - for (i = 0; attr[i] && strcmp(attr[i][0], xml->name); i++); - for (j = 1; attr[i] && attr[i][j]; j += 3) { // default attributes - if (! attr[i][j + 1] || ezxml_attr(xml, attr[i][j]) != attr[i][j + 1]) - continue; // skip duplicates and non-values - while (*len + strlen(attr[i][j]) + 7 > *max) // reallocate s - *s = realloc(*s, *max += EZXML_BUFSIZE); - - *len += sprintf(*s + *len, " %s=\"", attr[i][j]); - ezxml_ampencode(attr[i][j + 1], -1, s, len, max, 1); - *len += sprintf(*s + *len, "\""); - } - *len += sprintf(*s + *len, ">"); - - *s = (xml->child) ? ezxml_toxml_r(xml->child, s, len, max, 0, attr) //child - : ezxml_ampencode(xml->txt, -1, s, len, max, 0); //data - - while (*len + strlen(xml->name) + 4 > *max) // reallocate s - *s = realloc(*s, *max += EZXML_BUFSIZE); - - *len += sprintf(*s + *len, "</%s>", xml->name); // close tag - - while (txt[off] && off < xml->off) off++; // make sure off is within bounds - return (xml->ordered) ? ezxml_toxml_r(xml->ordered, s, len, max, off, attr) - : ezxml_ampencode(txt + off, -1, s, len, max, 0); -} - -// Converts an ezxml structure back to xml. Returns a string of xml data that -// must be freed. -char *ezxml_toxml(ezxml_t xml) -{ - ezxml_t p = (xml) ? xml->parent : NULL, o = (xml) ? xml->ordered : NULL; - ezxml_root_t root = (ezxml_root_t)xml; - size_t len = 0, max = EZXML_BUFSIZE; - char *s = strcpy(malloc(max), ""), *t, *n; - int i, j, k; - - if (! xml || ! xml->name) return realloc(s, len + 1); - while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; // root tag - - for (i = 0; ! p && root->pi[i]; i++) { // pre-root processing instructions - for (k = 2; root->pi[i][k - 1]; k++); - for (j = 1; (n = root->pi[i][j]); j++) { - if (root->pi[i][k][j - 1] == '>') continue; // not pre-root - while (len + strlen(t = root->pi[i][0]) + strlen(n) + 7 > max) - s = realloc(s, max += EZXML_BUFSIZE); - len += sprintf(s + len, "<?%s%s%s?>\n", t, *n ? " " : "", n); - } - } - - xml->parent = xml->ordered = NULL; - s = ezxml_toxml_r(xml, &s, &len, &max, 0, root->attr); - xml->parent = p; - xml->ordered = o; - - for (i = 0; ! p && root->pi[i]; i++) { // post-root processing instructions - for (k = 2; root->pi[i][k - 1]; k++); - for (j = 1; (n = root->pi[i][j]); j++) { - if (root->pi[i][k][j - 1] == '<') continue; // not post-root - while (len + strlen(t = root->pi[i][0]) + strlen(n) + 7 > max) - s = realloc(s, max += EZXML_BUFSIZE); - len += sprintf(s + len, "\n<?%s%s%s?>", t, *n ? " " : "", n); - } - } - return realloc(s, len + 1); -} - -// free the memory allocated for the ezxml structure -void ezxml_free(ezxml_t xml) -{ - ezxml_root_t root = (ezxml_root_t)xml; - int i, j; - char **a, *s; - - if (! xml) return; - ezxml_free(xml->child); - ezxml_free(xml->ordered); - - if (! xml->parent) { // free root tag allocations - for (i = 10; root->ent[i]; i += 2) // 0 - 9 are default entites (<>&"') - if ((s = root->ent[i + 1]) < root->s || s > root->e) free(s); - free(root->ent); // free list of general entities - - for (i = 0; (a = root->attr[i]); i++) { - for (j = 1; a[j++]; j += 2) // free malloced attribute values - if (a[j] && (a[j] < root->s || a[j] > root->e)) free(a[j]); - free(a); - } - if (root->attr[0]) free(root->attr); // free default attribute list - - for (i = 0; root->pi[i]; i++) { - for (j = 1; root->pi[i][j]; j++); - free(root->pi[i][j + 1]); - free(root->pi[i]); - } - if (root->pi[0]) free(root->pi); // free processing instructions - - if (root->len == -1) free(root->m); // malloced xml data -#ifndef EZXML_NOMMAP - else if (root->len) munmap(root->m, root->len); // mem mapped xml data -#endif // EZXML_NOMMAP - if (root->u) free(root->u); // utf8 conversion - } - - ezxml_free_attr(xml->attr); // tag attributes - if ((xml->flags & EZXML_TXTM)) free(xml->txt); // character content - if ((xml->flags & EZXML_NAMEM)) free(xml->name); // tag name - free(xml); -} - -// return parser error message or empty string if none -const char *ezxml_error(ezxml_t xml) -{ - while (xml && xml->parent) xml = xml->parent; // find root tag - return (xml) ? ((ezxml_root_t)xml)->err : ""; -} - -// returns a new empty ezxml structure with the given root tag name -ezxml_t ezxml_new(const char *name) -{ - static char *ent[] = { "lt;", "<", "gt;", ">", "quot;", """, - "apos;", "'", "amp;", "&", NULL }; - ezxml_root_t root = (ezxml_root_t)memset(malloc(sizeof(struct ezxml_root)), - '\0', sizeof(struct ezxml_root)); - root->xml.name = (char *)name; - root->cur = &root->xml; - strcpy(root->err, root->xml.txt = ""); - root->ent = memcpy(malloc(sizeof(ent)), ent, sizeof(ent)); - root->attr = root->pi = (char ***)(root->xml.attr = EZXML_NIL); - return &root->xml; -} - -// inserts an existing tag into an ezxml structure -ezxml_t ezxml_insert(ezxml_t xml, ezxml_t dest, size_t off) -{ - ezxml_t cur, prev, head; - - xml->next = xml->sibling = xml->ordered = NULL; - xml->off = off; - xml->parent = dest; - - if ((head = dest->child)) { // already have sub tags - if (head->off <= off) { // not first subtag - for (cur = head; cur->ordered && cur->ordered->off <= off; - cur = cur->ordered); - xml->ordered = cur->ordered; - cur->ordered = xml; - } - else { // first subtag - xml->ordered = head; - dest->child = xml; - } - - for (cur = head, prev = NULL; cur && strcmp(cur->name, xml->name); - prev = cur, cur = cur->sibling); // find tag type - if (cur && cur->off <= off) { // not first of type - while (cur->next && cur->next->off <= off) cur = cur->next; - xml->next = cur->next; - cur->next = xml; - } - else { // first tag of this type - if (prev && cur) prev->sibling = cur->sibling; // remove old first - xml->next = cur; // old first tag is now next - for (cur = head, prev = NULL; cur && cur->off <= off; - prev = cur, cur = cur->sibling); // new sibling insert point - xml->sibling = cur; - if (prev) prev->sibling = xml; - } - } - else dest->child = xml; // only sub tag - - return xml; -} - -// Adds a child tag. off is the offset of the child tag relative to the start -// of the parent tag's character content. Returns the child tag. -ezxml_t ezxml_add_child(ezxml_t xml, const char *name, size_t off) -{ - ezxml_t child; - - if (! xml) return NULL; - child = (ezxml_t)memset(malloc(sizeof(struct ezxml)), '\0', - sizeof(struct ezxml)); - child->name = (char *)name; - child->attr = EZXML_NIL; - child->txt = ""; - - return ezxml_insert(child, xml, off); -} - -// sets the character content for the given tag and returns the tag -ezxml_t ezxml_set_txt(ezxml_t xml, const char *txt) -{ - if (! xml) return NULL; - if (xml->flags & EZXML_TXTM) free(xml->txt); // existing txt was malloced - xml->flags &= ~EZXML_TXTM; - xml->txt = (char *)txt; - return xml; -} - -// Sets the given tag attribute or adds a new attribute if not found. A value -// of NULL will remove the specified attribute. Returns the tag given. -ezxml_t ezxml_set_attr(ezxml_t xml, const char *name, const char *value) -{ - int l = 0, c; - - if (! xml) return NULL; - while (xml->attr[l] && strcmp(xml->attr[l], name)) l += 2; - if (! xml->attr[l]) { // not found, add as new attribute - if (! value) return xml; // nothing to do - if (xml->attr == EZXML_NIL) { // first attribute - xml->attr = malloc(4 * sizeof(char *)); - xml->attr[1] = strdup(""); // empty list of malloced names/vals - } - else xml->attr = realloc(xml->attr, (l + 4) * sizeof(char *)); - - xml->attr[l] = (char *)name; // set attribute name - xml->attr[l + 2] = NULL; // null terminate attribute list - xml->attr[l + 3] = realloc(xml->attr[l + 1], - (c = strlen(xml->attr[l + 1])) + 2); - strcpy(xml->attr[l + 3] + c, " "); // set name/value as not malloced - if (xml->flags & EZXML_DUP) xml->attr[l + 3][c] = EZXML_NAMEM; - } - else if (xml->flags & EZXML_DUP) free((char *)name); // name was strduped - - for (c = l; xml->attr[c]; c += 2); // find end of attribute list - if (xml->attr[c + 1][l / 2] & EZXML_TXTM) free(xml->attr[l + 1]); //old val - if (xml->flags & EZXML_DUP) xml->attr[c + 1][l / 2] |= EZXML_TXTM; - else xml->attr[c + 1][l / 2] &= ~EZXML_TXTM; - - if (value) xml->attr[l + 1] = (char *)value; // set attribute value - else { // remove attribute - if (xml->attr[c + 1][l / 2] & EZXML_NAMEM) free(xml->attr[l]); - memmove(xml->attr + l, xml->attr + l + 2, (c - l + 2) * sizeof(char*)); - xml->attr = realloc(xml->attr, (c + 2) * sizeof(char *)); - memmove(xml->attr[c + 1] + (l / 2), xml->attr[c + 1] + (l / 2) + 1, - (c / 2) - (l / 2)); // fix list of which name/vals are malloced - } - xml->flags &= ~EZXML_DUP; // clear strdup() flag - return xml; -} - -// sets a flag for the given tag and returns the tag -ezxml_t ezxml_set_flag(ezxml_t xml, short flag) -{ - if (xml) xml->flags |= flag; - return xml; -} - -// removes a tag along with its subtags without freeing its memory -ezxml_t ezxml_cut(ezxml_t xml) -{ - ezxml_t cur; - - if (! xml) return NULL; // nothing to do - if (xml->next) xml->next->sibling = xml->sibling; // patch sibling list - - if (xml->parent) { // not root tag - cur = xml->parent->child; // find head of subtag list - if (cur == xml) xml->parent->child = xml->ordered; // first subtag - else { // not first subtag - while (cur->ordered != xml) cur = cur->ordered; - cur->ordered = cur->ordered->ordered; // patch ordered list - - cur = xml->parent->child; // go back to head of subtag list - if (strcmp(cur->name, xml->name)) { // not in first sibling list - while (strcmp(cur->sibling->name, xml->name)) - cur = cur->sibling; - if (cur->sibling == xml) { // first of a sibling list - cur->sibling = (xml->next) ? xml->next - : cur->sibling->sibling; - } - else cur = cur->sibling; // not first of a sibling list - } - - while (cur->next && cur->next != xml) cur = cur->next; - if (cur->next) cur->next = cur->next->next; // patch next list - } - } - xml->ordered = xml->sibling = xml->next = NULL; - return xml; -} - -#ifdef EZXML_TEST // test harness -int main(int argc, char **argv) -{ - ezxml_t xml; - char *s; - int i; - - if (argc != 2) return fprintf(stderr, "usage: %s xmlfile\n", argv[0]); - - xml = ezxml_parse_file(argv[1]); - printf("%s\n", (s = ezxml_toxml(xml))); - free(s); - i = fprintf(stderr, "%s", ezxml_error(xml)); - ezxml_free(xml); - return (i) ? 1 : 0; -} -#endif // EZXML_TEST |