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#ifndef lint |
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static const char RCSid[] = "$Id: ezxml.c,v 2.7 2015/02/14 00:34:43 greg Exp $"; |
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#endif |
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/* ezxml.c |
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* |
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* Copyright 2004-2006 Aaron Voisine <[email protected]> |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining |
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* a copy of this software and associated documentation files (the |
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* "Software"), to deal in the Software without restriction, including |
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* without limitation the rights to use, copy, modify, merge, publish, |
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* distribute, sublicense, and/or sell copies of the Software, and to |
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* permit persons to whom the Software is furnished to do so, subject to |
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* the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included |
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* in all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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*/ |
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|
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <ctype.h> |
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#include <sys/types.h> |
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#ifndef EZXML_NOMMAP |
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#include <unistd.h> |
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#include <sys/mman.h> |
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#endif /* EZXML_NOMMAP */ |
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#include <sys/stat.h> |
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#include "ezxml.h" |
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|
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#ifdef _WIN32 |
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#include <io.h> |
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#define read _read |
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#define open _open |
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#define close _close |
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#endif |
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|
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#define EZXML_WS "\t\r\n " /* whitespace */ |
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#define EZXML_ERRL 128 /* maximum error string length */ |
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|
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typedef struct ezxml_root *ezxml_root_t; |
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struct ezxml_root { /* additional data for the root tag */ |
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struct ezxml xml; /* is a super-struct built on top of ezxml struct */ |
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ezxml_t cur; /* current xml tree insertion point */ |
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char *m; /* original xml string */ |
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size_t len; /* length of allocated memory for mmap, -1 for malloc */ |
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char *u; /* UTF-8 conversion of string if original was UTF-16 */ |
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char *s; /* start of work area */ |
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char *e; /* end of work area */ |
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char **ent; /* general entities (ampersand sequences) */ |
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char ***attr; /* default attributes */ |
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char ***pi; /* processing instructions */ |
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short standalone; /* non-zero if <?xml standalone="yes"?> */ |
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char err[EZXML_ERRL]; /* error string */ |
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}; |
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|
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char *EZXML_NIL[] = { NULL }; /* empty, null terminated array of strings */ |
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|
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/* returns the first child tag with the given name or NULL if not found */ |
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ezxml_t ezxml_child(ezxml_t xml, const char *name) |
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{ |
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xml = (xml) ? xml->child : NULL; |
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while (xml && strcmp(name, xml->name)) xml = xml->sibling; |
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return xml; |
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} |
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|
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/* returns the given tag's character content or empty string if none */ |
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char *ezxml_txt(ezxml_t xml) |
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{ |
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if (xml == NULL) |
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return ""; |
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return xml->txt; |
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} |
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|
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/* returns the Nth tag with the same name in the same subsection or NULL if not */ |
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/* found */ |
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ezxml_t ezxml_idx(ezxml_t xml, int idx) |
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{ |
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for (; xml && idx; idx--) xml = xml->next; |
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return xml; |
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} |
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|
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/* returns the value of the requested tag attribute or NULL if not found */ |
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const char *ezxml_attr(ezxml_t xml, const char *attr) |
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{ |
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int i = 0, j = 1; |
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ezxml_root_t root = (ezxml_root_t)xml; |
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|
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if (! xml || ! xml->attr) return NULL; |
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while (xml->attr[i] && strcmp(attr, xml->attr[i])) i += 2; |
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if (xml->attr[i]) return xml->attr[i + 1]; /* found attribute */ |
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|
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while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; /* root tag */ |
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for (i = 0; root->attr[i] && strcmp(xml->name, root->attr[i][0]); i++); |
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if (! root->attr[i]) return NULL; /* no matching default attributes */ |
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while (root->attr[i][j] && strcmp(attr, root->attr[i][j])) j += 3; |
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return (root->attr[i][j]) ? root->attr[i][j + 1] : NULL; /* found default */ |
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} |
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|
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/* same as ezxml_get but takes an already initialized va_list */ |
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ezxml_t ezxml_vget(ezxml_t xml, va_list ap) |
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{ |
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char *name = va_arg(ap, char *); |
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int idx = -1; |
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|
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if (name && *name) { |
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idx = va_arg(ap, int); |
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xml = ezxml_child(xml, name); |
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} |
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return (idx < 0) ? xml : ezxml_vget(ezxml_idx(xml, idx), ap); |
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} |
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|
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/* Traverses the xml tree to retrieve a specific subtag. Takes a variable */ |
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/* length list of tag names and indexes. The argument list must be terminated */ |
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/* by either an index of -1 or an empty string tag name. Example: */ |
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/* title = ezxml_get(library, "shelf", 0, "book", 2, "title", -1); */ |
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/* This retrieves the title of the 3rd book on the 1st shelf of library. */ |
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/* Returns NULL if not found. */ |
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ezxml_t ezxml_get(ezxml_t xml, ...) |
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{ |
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va_list ap; |
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ezxml_t r; |
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|
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va_start(ap, xml); |
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r = ezxml_vget(xml, ap); |
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va_end(ap); |
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return r; |
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} |
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|
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/* returns a null terminated array of processing instructions for the given */ |
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/* target */ |
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const char **ezxml_pi(ezxml_t xml, const char *target) |
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{ |
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ezxml_root_t root = (ezxml_root_t)xml; |
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int i = 0; |
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|
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if (! root) return (const char **)EZXML_NIL; |
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while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; /* root tag */ |
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while (root->pi[i] && strcmp(target, root->pi[i][0])) i++; /* find target */ |
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return (const char **)((root->pi[i]) ? root->pi[i] + 1 : EZXML_NIL); |
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} |
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|
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/* set an error string and return root */ |
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ezxml_t ezxml_err(ezxml_root_t root, char *s, const char *err, ...) |
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{ |
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va_list ap; |
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int line = 1; |
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char *t, fmt[EZXML_ERRL]; |
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|
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for (t = root->s; t < s; t++) if (*t == '\n') line++; |
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sprintf(fmt, "[error near line %d]: %s", line, err); |
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|
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va_start(ap, err); |
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vsnprintf(root->err, EZXML_ERRL, fmt, ap); |
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va_end(ap); |
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|
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return &root->xml; |
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} |
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|
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/* Recursively decodes entity and character references and normalizes new lines */ |
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/* ent is a null terminated array of alternating entity names and values. set t */ |
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/* to '&' for general entity decoding, '%' for parameter entity decoding, 'c' */ |
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/* for cdata sections, ' ' for attribute normalization, or '*' for non-cdata */ |
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/* attribute normalization. Returns s, or if the decoded string is longer than */ |
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/* s, returns a malloced string that must be freed. */ |
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char *ezxml_decode(char *s, char **ent, char t) |
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{ |
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char *e, *r = s, *m = s; |
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long b, c, d, l; |
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|
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for (; *s; s++) /* normalize line endings */ |
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if (*s == '\r') { |
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char *s2 = s+1; |
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do { |
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while (*s2 == '\r') |
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++s2; |
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*s++ = *s2; |
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} while (*s2++); |
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break; |
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} |
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|
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for (s = r; ; ) { |
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while (*s && *s != '&' && (*s != '%' || t != '%') && !isspace(*s)) s++; |
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|
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if (! *s) break; |
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else if (t != 'c' && ! strncmp(s, "&#", 2)) { /* character reference */ |
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if (s[2] == 'x') c = strtol(s + 3, &e, 16); /* base 16 */ |
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else c = strtol(s + 2, &e, 10); /* base 10 */ |
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if (! c || *e != ';') { s++; continue; } /* not a character ref */ |
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|
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if (c < 0x80) *(s++) = c; /* US-ASCII subset */ |
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else { /* multi-byte UTF-8 sequence */ |
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for (b = 0, d = c; d; d /= 2) b++; /* number of bits in c */ |
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b = (b - 2) / 5; /* number of bytes in payload */ |
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*(s++) = (0xFF << (7 - b)) | (c >> (6 * b)); /* head */ |
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while (b) *(s++) = 0x80 | ((c >> (6 * --b)) & 0x3F); /* payload */ |
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} |
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|
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memmove(s, strchr(s, ';') + 1, strlen(strchr(s, ';'))); |
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} |
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else if ((*s == '&' && (t == '&' || t == ' ' || t == '*')) || |
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(*s == '%' && t == '%')) { /* entity reference */ |
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for (b = 0; ent[b] && strncmp(s + 1, ent[b], strlen(ent[b])); |
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b += 2); /* find entity in entity list */ |
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|
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if (ent[b++]) { /* found a match */ |
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if ((c = strlen(ent[b])) - 1 > (e = strchr(s, ';')) - s) { |
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l = (d = (s - r)) + c + strlen(e); /* new length */ |
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r = (r == m) ? strcpy(malloc(l), r) : realloc(r, l); |
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e = strchr((s = r + d), ';'); /* fix up pointers */ |
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} |
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|
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memmove(s + c, e + 1, strlen(e)); /* shift rest of string */ |
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strncpy(s, ent[b], c); /* copy in replacement text */ |
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} |
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else s++; /* not a known entity */ |
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} |
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else if ((t == ' ' || t == '*') && isspace(*s)) *(s++) = ' '; |
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else s++; /* no decoding needed */ |
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} |
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|
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if (t == '*') { /* normalize spaces for non-cdata attributes */ |
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for (s = r; *s; s++) { |
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if ((l = strspn(s, " "))) memmove(s, s + l, strlen(s + l) + 1); |
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while (*s && *s != ' ') s++; |
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} |
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if (--s >= r && *s == ' ') *s = '\0'; /* trim any trailing space */ |
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} |
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return r; |
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} |
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|
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/* called when parser finds start of new tag */ |
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void ezxml_open_tag(ezxml_root_t root, char *name, char **attr) |
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{ |
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ezxml_t xml = root->cur; |
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|
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if (xml->name) xml = ezxml_add_child(xml, name, strlen(xml->txt)); |
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else xml->name = name; /* first open tag */ |
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|
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xml->attr = attr; |
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root->cur = xml; /* update tag insertion point */ |
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} |
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|
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/* called when parser finds character content between open and closing tag */ |
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void ezxml_char_content(ezxml_root_t root, char *s, size_t len, char t) |
256 |
{ |
257 |
ezxml_t xml = root->cur; |
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char *m = s; |
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size_t l; |
260 |
|
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if (! xml || ! xml->name || ! len) return; /* sanity check */ |
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|
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s[len] = '\0'; /* null terminate text (calling functions anticipate this) */ |
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len = strlen(s = ezxml_decode(s, root->ent, t)) + 1; |
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|
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if (! *(xml->txt)) xml->txt = s; /* initial character content */ |
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else { /* allocate our own memory and make a copy */ |
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xml->txt = (xml->flags & EZXML_TXTM) /* allocate some space */ |
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? realloc(xml->txt, (l = strlen(xml->txt)) + len) |
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: strcpy(malloc((l = strlen(xml->txt)) + len), xml->txt); |
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strcpy(xml->txt + l, s); /* add new char content */ |
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if (s != m) free(s); /* free s if it was malloced by ezxml_decode() */ |
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} |
274 |
|
275 |
if (xml->txt != m) ezxml_set_flag(xml, EZXML_TXTM); |
276 |
} |
277 |
|
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/* called when parser finds closing tag */ |
279 |
ezxml_t ezxml_close_tag(ezxml_root_t root, char *name, char *s) |
280 |
{ |
281 |
if (! root->cur || ! root->cur->name || strcmp(name, root->cur->name)) |
282 |
return ezxml_err(root, s, "unexpected closing tag </%s>", name); |
283 |
|
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root->cur = root->cur->parent; |
285 |
return NULL; |
286 |
} |
287 |
|
288 |
/* checks for circular entity references, returns non-zero if no circular */ |
289 |
/* references are found, zero otherwise */ |
290 |
int ezxml_ent_ok(char *name, char *s, char **ent) |
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{ |
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int i; |
293 |
|
294 |
for (; ; s++) { |
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while (*s && *s != '&') s++; /* find next entity reference */ |
296 |
if (! *s) return 1; |
297 |
if (! strncmp(s + 1, name, strlen(name))) return 0; /* circular ref. */ |
298 |
for (i = 0; ent[i] && strncmp(ent[i], s + 1, strlen(ent[i])); i += 2); |
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if (ent[i] && ! ezxml_ent_ok(name, ent[i + 1], ent)) return 0; |
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} |
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} |
302 |
|
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/* called when the parser finds a processing instruction */ |
304 |
void ezxml_proc_inst(ezxml_root_t root, char *s, size_t len) |
305 |
{ |
306 |
int i = 0, j = 1; |
307 |
char *target = s; |
308 |
|
309 |
s[len] = '\0'; /* null terminate instruction */ |
310 |
if (*(s += strcspn(s, EZXML_WS))) { |
311 |
*s = '\0'; /* null terminate target */ |
312 |
s += strspn(s + 1, EZXML_WS) + 1; /* skip whitespace after target */ |
313 |
} |
314 |
|
315 |
if (! strcmp(target, "xml")) { /* <?xml ... ?> */ |
316 |
if ((s = strstr(s, "standalone")) && ! strncmp(s + strspn(s + 10, |
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EZXML_WS "='\"") + 10, "yes", 3)) root->standalone = 1; |
318 |
return; |
319 |
} |
320 |
|
321 |
if (! root->pi[0]) *(root->pi = malloc(sizeof(char **))) = NULL; /*first pi */ |
322 |
|
323 |
while (root->pi[i] && strcmp(target, root->pi[i][0])) i++; /* find target */ |
324 |
if (! root->pi[i]) { /* new target */ |
325 |
root->pi = realloc(root->pi, sizeof(char **) * (i + 2)); |
326 |
root->pi[i] = malloc(sizeof(char *) * 3); |
327 |
root->pi[i][0] = target; |
328 |
root->pi[i][1] = (char *)(root->pi[i + 1] = NULL); /* terminate pi list */ |
329 |
root->pi[i][2] = strdup(""); /* empty document position list */ |
330 |
} |
331 |
|
332 |
while (root->pi[i][j]) j++; /* find end of instruction list for this target */ |
333 |
root->pi[i] = realloc(root->pi[i], sizeof(char *) * (j + 3)); |
334 |
root->pi[i][j + 2] = realloc(root->pi[i][j + 1], j + 1); |
335 |
strcpy(root->pi[i][j + 2] + j - 1, (root->xml.name) ? ">" : "<"); |
336 |
root->pi[i][j + 1] = NULL; /* null terminate pi list for this target */ |
337 |
root->pi[i][j] = s; /* set instruction */ |
338 |
} |
339 |
|
340 |
/* called when the parser finds an internal doctype subset */ |
341 |
short ezxml_internal_dtd(ezxml_root_t root, char *s, size_t len) |
342 |
{ |
343 |
char q, *c, *t, *n = NULL, *v, **ent, **pe; |
344 |
int i, j; |
345 |
|
346 |
pe = memcpy(malloc(sizeof(EZXML_NIL)), EZXML_NIL, sizeof(EZXML_NIL)); |
347 |
|
348 |
for (s[len] = '\0'; s; ) { |
349 |
while (*s && *s != '<' && *s != '%') s++; /* find next declaration */ |
350 |
|
351 |
if (! *s) break; |
352 |
else if (! strncmp(s, "<!ENTITY", 8)) { /* parse entity definitions */ |
353 |
c = s += strspn(s + 8, EZXML_WS) + 8; /* skip white space separator */ |
354 |
n = s + strspn(s, EZXML_WS "%"); /* find name */ |
355 |
*(s = n + strcspn(n, EZXML_WS)) = ';'; /* append ; to name */ |
356 |
|
357 |
v = s + strspn(s + 1, EZXML_WS) + 1; /* find value */ |
358 |
if ((q = *(v++)) != '"' && q != '\'') { /* skip externals */ |
359 |
s = strchr(s, '>'); |
360 |
continue; |
361 |
} |
362 |
|
363 |
for (i = 0, ent = (*c == '%') ? pe : root->ent; ent[i]; i++); |
364 |
ent = realloc(ent, (i + 3) * sizeof(char *)); /* space for next ent */ |
365 |
if (*c == '%') pe = ent; |
366 |
else root->ent = ent; |
367 |
|
368 |
*(++s) = '\0'; /* null terminate name */ |
369 |
if ((s = strchr(v, q))) *(s++) = '\0'; /* null terminate value */ |
370 |
ent[i + 1] = ezxml_decode(v, pe, '%'); /* set value */ |
371 |
ent[i + 2] = NULL; /* null terminate entity list */ |
372 |
if (! ezxml_ent_ok(n, ent[i + 1], ent)) { /* circular reference */ |
373 |
if (ent[i + 1] != v) free(ent[i + 1]); |
374 |
ezxml_err(root, v, "circular entity declaration &%s", n); |
375 |
break; |
376 |
} |
377 |
else ent[i] = n; /* set entity name */ |
378 |
} |
379 |
else if (! strncmp(s, "<!ATTLIST", 9)) { /* parse default attributes */ |
380 |
t = s + strspn(s + 9, EZXML_WS) + 9; /* skip whitespace separator */ |
381 |
if (! *t) { ezxml_err(root, t, "unclosed <!ATTLIST"); break; } |
382 |
if (*(s = t + strcspn(t, EZXML_WS ">")) == '>') continue; |
383 |
else *s = '\0'; /* null terminate tag name */ |
384 |
for (i = 0; root->attr[i] && strcmp(n, root->attr[i][0]); i++); |
385 |
++s; |
386 |
while (*(n = s + strspn(s, EZXML_WS)) && *n != '>') { |
387 |
if (*(s = n + strcspn(n, EZXML_WS))) *s = '\0'; /* attr name */ |
388 |
else { ezxml_err(root, t, "malformed <!ATTLIST"); break; } |
389 |
|
390 |
s += strspn(s + 1, EZXML_WS) + 1; /* find next token */ |
391 |
c = (strncmp(s, "CDATA", 5)) ? "*" : " "; /* is it cdata? */ |
392 |
if (! strncmp(s, "NOTATION", 8)) |
393 |
s += strspn(s + 8, EZXML_WS) + 8; |
394 |
s = (*s == '(') ? strchr(s, ')') : s + strcspn(s, EZXML_WS); |
395 |
if (! s) { ezxml_err(root, t, "malformed <!ATTLIST"); break; } |
396 |
|
397 |
s += strspn(s, EZXML_WS ")"); /* skip white space separator */ |
398 |
if (! strncmp(s, "#FIXED", 6)) |
399 |
s += strspn(s + 6, EZXML_WS) + 6; |
400 |
if (*s == '#') { /* no default value */ |
401 |
s += strcspn(s, EZXML_WS ">") - 1; |
402 |
if (*c == ' ') continue; /* cdata is default, nothing to do */ |
403 |
v = NULL; |
404 |
} |
405 |
else if ((*s == '"' || *s == '\'') && /* default value */ |
406 |
(s = strchr(v = s + 1, *s))) *s = '\0'; |
407 |
else { ezxml_err(root, t, "malformed <!ATTLIST"); break; } |
408 |
|
409 |
if (! root->attr[i]) { /* new tag name */ |
410 |
root->attr = (! i) ? malloc(2 * sizeof(char **)) |
411 |
: realloc(root->attr, |
412 |
(i + 2) * sizeof(char **)); |
413 |
root->attr[i] = malloc(2 * sizeof(char *)); |
414 |
root->attr[i][0] = t; /* set tag name */ |
415 |
root->attr[i][1] = (char *)(root->attr[i + 1] = NULL); |
416 |
} |
417 |
|
418 |
for (j = 1; root->attr[i][j]; j += 3); /* find end of list */ |
419 |
root->attr[i] = realloc(root->attr[i], |
420 |
(j + 4) * sizeof(char *)); |
421 |
|
422 |
root->attr[i][j + 3] = NULL; /* null terminate list */ |
423 |
root->attr[i][j + 2] = c; /* is it cdata? */ |
424 |
root->attr[i][j + 1] = (v) ? ezxml_decode(v, root->ent, *c) |
425 |
: NULL; |
426 |
root->attr[i][j] = n; /* attribute name */ |
427 |
++s; |
428 |
} |
429 |
} |
430 |
else if (! strncmp(s, "<!--", 4)) s = strstr(s + 4, "-->"); /* comments */ |
431 |
else if (! strncmp(s, "<?", 2)) { /* processing instructions */ |
432 |
if ((s = strstr(c = s + 2, "?>"))) |
433 |
ezxml_proc_inst(root, c, s++ - c); |
434 |
} |
435 |
else if (*s == '<') s = strchr(s, '>'); /* skip other declarations */ |
436 |
else if (*(s++) == '%' && ! root->standalone) break; |
437 |
} |
438 |
|
439 |
free(pe); |
440 |
return ! *root->err; |
441 |
} |
442 |
|
443 |
/* Converts a UTF-16 string to UTF-8. Returns a new string that must be freed */ |
444 |
/* or NULL if no conversion was needed. */ |
445 |
char *ezxml_str2utf8(char **s, size_t *len) |
446 |
{ |
447 |
char *u; |
448 |
size_t l = 0, sl, max = *len; |
449 |
long c, d; |
450 |
int b, be = (**s == '\xFE') ? 1 : (**s == '\xFF') ? 0 : -1; |
451 |
|
452 |
if (be == -1) return NULL; /* not UTF-16 */ |
453 |
|
454 |
u = malloc(max); |
455 |
for (sl = 2; sl < *len - 1; sl += 2) { |
456 |
c = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF) /*UTF-16BE */ |
457 |
: (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF); /*UTF-16LE */ |
458 |
if (c >= 0xD800 && c <= 0xDFFF && (sl += 2) < *len - 1) { /* high-half */ |
459 |
d = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF) |
460 |
: (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF); |
461 |
c = (((c & 0x3FF) << 10) | (d & 0x3FF)) + 0x10000; |
462 |
} |
463 |
|
464 |
while (l + 6 > max) u = realloc(u, max += EZXML_BUFSIZE); |
465 |
if (c < 0x80) u[l++] = c; /* US-ASCII subset */ |
466 |
else { /* multi-byte UTF-8 sequence */ |
467 |
for (b = 0, d = c; d; d /= 2) b++; /* bits in c */ |
468 |
b = (b - 2) / 5; /* bytes in payload */ |
469 |
u[l++] = (0xFF << (7 - b)) | (c >> (6 * b)); /* head */ |
470 |
while (b) u[l++] = 0x80 | ((c >> (6 * --b)) & 0x3F); /* payload */ |
471 |
} |
472 |
} |
473 |
return *s = realloc(u, *len = l); |
474 |
} |
475 |
|
476 |
/* frees a tag attribute list */ |
477 |
void ezxml_free_attr(char **attr) { |
478 |
int i = 0; |
479 |
char *m; |
480 |
|
481 |
if (! attr || attr == EZXML_NIL) return; /* nothing to free */ |
482 |
while (attr[i]) i += 2; /* find end of attribute list */ |
483 |
m = attr[i + 1]; /* list of which names and values are malloced */ |
484 |
for (i = 0; m[i]; i++) { |
485 |
if (m[i] & EZXML_NAMEM) free(attr[i * 2]); |
486 |
if (m[i] & EZXML_TXTM) free(attr[(i * 2) + 1]); |
487 |
} |
488 |
free(m); |
489 |
free(attr); |
490 |
} |
491 |
|
492 |
/* parse the given xml string and return an ezxml structure */ |
493 |
ezxml_t ezxml_parse_str(char *s, size_t len) |
494 |
{ |
495 |
ezxml_root_t root = (ezxml_root_t)ezxml_new(NULL); |
496 |
char q, e, *d, **attr, **a = NULL; /* initialize a to avoid compile warning */ |
497 |
int l, i, j; |
498 |
|
499 |
root->m = s; |
500 |
if (! len) return ezxml_err(root, NULL, "root tag missing"); |
501 |
root->u = ezxml_str2utf8(&s, &len); /* convert utf-16 to utf-8 */ |
502 |
root->e = (root->s = s) + len; /* record start and end of work area */ |
503 |
|
504 |
e = s[len - 1]; /* save end char */ |
505 |
s[len - 1] = '\0'; /* turn end char into null terminator */ |
506 |
|
507 |
while (*s && *s != '<') s++; /* find first tag */ |
508 |
if (! *s) return ezxml_err(root, s, "root tag missing"); |
509 |
|
510 |
for (; ; ) { |
511 |
attr = (char **)EZXML_NIL; |
512 |
d = ++s; |
513 |
|
514 |
if (isalpha(*s) || *s == '_' || *s == ':' || *s < '\0') { /* new tag */ |
515 |
if (! root->cur) |
516 |
return ezxml_err(root, d, "markup outside of root element"); |
517 |
|
518 |
s += strcspn(s, EZXML_WS "/>"); |
519 |
while (isspace(*s)) *(s++) = '\0'; /* null terminate tag name */ |
520 |
|
521 |
if (*s && *s != '/' && *s != '>') /* find tag in default attr list */ |
522 |
for (i = 0; (a = root->attr[i]) && strcmp(a[0], d); i++); |
523 |
|
524 |
for (l = 0; *s && *s != '/' && *s != '>'; l += 2) { /* new attrib */ |
525 |
attr = (l) ? realloc(attr, (l + 4) * sizeof(char *)) |
526 |
: malloc(4 * sizeof(char *)); /* allocate space */ |
527 |
attr[l + 3] = (l) ? realloc(attr[l + 1], (l / 2) + 2) |
528 |
: malloc(2); /* mem for list of maloced vals */ |
529 |
strcpy(attr[l + 3] + (l / 2), " "); /* value is not malloced */ |
530 |
attr[l + 2] = NULL; /* null terminate list */ |
531 |
attr[l + 1] = ""; /* temporary attribute value */ |
532 |
attr[l] = s; /* set attribute name */ |
533 |
|
534 |
s += strcspn(s, EZXML_WS "=/>"); |
535 |
if (*s == '=' || isspace(*s)) { |
536 |
*(s++) = '\0'; /* null terminate tag attribute name */ |
537 |
q = *(s += strspn(s, EZXML_WS "=")); |
538 |
if (q == '"' || q == '\'') { /* attribute value */ |
539 |
attr[l + 1] = ++s; |
540 |
while (*s && *s != q) s++; |
541 |
if (*s) *(s++) = '\0'; /* null terminate attribute val */ |
542 |
else { |
543 |
ezxml_free_attr(attr); |
544 |
return ezxml_err(root, d, "missing %c", q); |
545 |
} |
546 |
|
547 |
for (j = 1; a && a[j] && strcmp(a[j], attr[l]); j +=3); |
548 |
attr[l + 1] = ezxml_decode(attr[l + 1], root->ent, (a |
549 |
&& a[j]) ? *a[j + 2] : ' '); |
550 |
if (attr[l + 1] < d || attr[l + 1] > s) |
551 |
attr[l + 3][l / 2] = EZXML_TXTM; /* value malloced */ |
552 |
} |
553 |
} |
554 |
while (isspace(*s)) s++; |
555 |
} |
556 |
|
557 |
if (*s == '/') { /* self closing tag */ |
558 |
*(s++) = '\0'; |
559 |
if ((*s && *s != '>') || (! *s && e != '>')) { |
560 |
if (l) ezxml_free_attr(attr); |
561 |
return ezxml_err(root, d, "missing >"); |
562 |
} |
563 |
ezxml_open_tag(root, d, attr); |
564 |
ezxml_close_tag(root, d, s); |
565 |
} |
566 |
else if ((q = *s) == '>' || (! *s && e == '>')) { /* open tag */ |
567 |
*s = '\0'; /* temporarily null terminate tag name */ |
568 |
ezxml_open_tag(root, d, attr); |
569 |
*s = q; |
570 |
} |
571 |
else { |
572 |
if (l) ezxml_free_attr(attr); |
573 |
return ezxml_err(root, d, "missing >"); |
574 |
} |
575 |
} |
576 |
else if (*s == '/') { /* close tag */ |
577 |
s += strcspn(d = s + 1, EZXML_WS ">") + 1; |
578 |
if (! (q = *s) && e != '>') return ezxml_err(root, d, "missing >"); |
579 |
*s = '\0'; /* temporarily null terminate tag name */ |
580 |
if (ezxml_close_tag(root, d, s)) return &root->xml; |
581 |
if (isspace(*s = q)) s += strspn(s, EZXML_WS); |
582 |
} |
583 |
else if (! strncmp(s, "!--", 3)) { /* xml comment */ |
584 |
if (! (s = strstr(s + 3, "--")) || (*(s += 2) != '>' && *s) || |
585 |
(! *s && e != '>')) return ezxml_err(root, d, "unclosed <!--"); |
586 |
} |
587 |
else if (! strncmp(s, "![CDATA[", 8)) { /* cdata */ |
588 |
if ((s = strstr(s, "]]>"))) |
589 |
ezxml_char_content(root, d + 8, (s += 2) - d - 10, 'c'); |
590 |
else return ezxml_err(root, d, "unclosed <![CDATA["); |
591 |
} |
592 |
else if (! strncmp(s, "!DOCTYPE", 8)) { /* dtd */ |
593 |
for (l = 0; *s && ((! l && *s != '>') || (l && (*s != ']' || |
594 |
*(s + strspn(s + 1, EZXML_WS) + 1) != '>'))); |
595 |
l = (*s == '[') ? 1 : l) s += strcspn(s + 1, "[]>") + 1; |
596 |
if (! *s && e != '>') |
597 |
return ezxml_err(root, d, "unclosed <!DOCTYPE"); |
598 |
d = (l) ? strchr(d, '[') + 1 : d; |
599 |
if (l && ! ezxml_internal_dtd(root, d, s++ - d)) return &root->xml; |
600 |
} |
601 |
else if (*s == '?') { /* <?...?> processing instructions */ |
602 |
do { s = strchr(s, '?'); } while (s && *(++s) && *s != '>'); |
603 |
if (! s || (! *s && e != '>')) |
604 |
return ezxml_err(root, d, "unclosed <?"); |
605 |
else ezxml_proc_inst(root, d + 1, s - d - 2); |
606 |
} |
607 |
else return ezxml_err(root, d, "unexpected <"); |
608 |
|
609 |
if (! s || ! *s) break; |
610 |
*s = '\0'; |
611 |
d = ++s; |
612 |
if (*s && *s != '<') { /* tag character content */ |
613 |
while (*s && *s != '<') s++; |
614 |
if (*s) ezxml_char_content(root, d, s - d, '&'); |
615 |
else break; |
616 |
} |
617 |
else if (! *s) break; |
618 |
} |
619 |
|
620 |
if (! root->cur) return &root->xml; |
621 |
else if (! root->cur->name) return ezxml_err(root, d, "root tag missing"); |
622 |
else return ezxml_err(root, d, "unclosed tag <%s>", root->cur->name); |
623 |
} |
624 |
|
625 |
/* Wrapper for ezxml_parse_str() that accepts a file stream. Reads the entire */ |
626 |
/* stream into memory and then parses it. For xml files, use ezxml_parse_file() */ |
627 |
/* or ezxml_parse_fd() */ |
628 |
ezxml_t ezxml_parse_fp(FILE *fp) |
629 |
{ |
630 |
ezxml_root_t root; |
631 |
size_t l, len = 0; |
632 |
char *s; |
633 |
|
634 |
if (! (s = malloc(EZXML_BUFSIZE))) return NULL; |
635 |
do { |
636 |
len += (l = fread((s + len), 1, EZXML_BUFSIZE, fp)); |
637 |
if (l == EZXML_BUFSIZE) s = realloc(s, len + EZXML_BUFSIZE); |
638 |
} while (s && l == EZXML_BUFSIZE); |
639 |
|
640 |
if (! s) return NULL; |
641 |
root = (ezxml_root_t)ezxml_parse_str(s, len); |
642 |
root->len = -1; /* so we know to free s in ezxml_free() */ |
643 |
return &root->xml; |
644 |
} |
645 |
|
646 |
/* A wrapper for ezxml_parse_str() that accepts a file descriptor. First */ |
647 |
/* attempts to mem map the file. Failing that, reads the file into memory. */ |
648 |
/* Returns NULL on failure. */ |
649 |
ezxml_t ezxml_parse_fd(int fd) |
650 |
{ |
651 |
ezxml_root_t root; |
652 |
struct stat st; |
653 |
size_t l; |
654 |
void *m; |
655 |
|
656 |
if (fd < 0) return NULL; |
657 |
fstat(fd, &st); |
658 |
|
659 |
#ifndef EZXML_NOMMAP |
660 |
l = (st.st_size + sysconf(_SC_PAGESIZE) - 1) & ~(sysconf(_SC_PAGESIZE) -1); |
661 |
if ((m = mmap(NULL, l, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0)) |
662 |
!= MAP_FAILED) { |
663 |
madvise(m, l, MADV_SEQUENTIAL); /* optimize for sequential access */ |
664 |
root = (ezxml_root_t)ezxml_parse_str(m, st.st_size); |
665 |
madvise(m, root->len = l, MADV_NORMAL); /* put it back to normal */ |
666 |
} |
667 |
else { /* mmap failed, read file into memory */ |
668 |
#endif /* EZXML_NOMMAP */ |
669 |
l = read(fd, m = malloc(st.st_size), st.st_size); |
670 |
root = (ezxml_root_t)ezxml_parse_str(m, l); |
671 |
root->len = -1; /* so we know to free s in ezxml_free() */ |
672 |
#ifndef EZXML_NOMMAP |
673 |
} |
674 |
#endif /* EZXML_NOMMAP */ |
675 |
return &root->xml; |
676 |
} |
677 |
|
678 |
/* a wrapper for ezxml_parse_fd that accepts a file name */ |
679 |
ezxml_t ezxml_parse_file(const char *file) |
680 |
{ |
681 |
int fd = open(file, O_RDONLY, 0); |
682 |
ezxml_t xml = ezxml_parse_fd(fd); |
683 |
|
684 |
if (fd >= 0) close(fd); |
685 |
return xml; |
686 |
} |
687 |
|
688 |
/* Encodes ampersand sequences appending the results to *dst, reallocating *dst */ |
689 |
/* if length excedes max. a is non-zero for attribute encoding. Returns *dst */ |
690 |
char *ezxml_ampencode(const char *s, size_t len, char **dst, size_t *dlen, |
691 |
size_t *max, short a) |
692 |
{ |
693 |
const char *e; |
694 |
|
695 |
for (e = s + len; s != e; s++) { |
696 |
while (*dlen + 10 > *max) *dst = realloc(*dst, *max += EZXML_BUFSIZE); |
697 |
|
698 |
switch (*s) { |
699 |
case '\0': return *dst; |
700 |
case '&': *dlen += sprintf(*dst + *dlen, "&"); break; |
701 |
case '<': *dlen += sprintf(*dst + *dlen, "<"); break; |
702 |
case '>': *dlen += sprintf(*dst + *dlen, ">"); break; |
703 |
case '"': *dlen += sprintf(*dst + *dlen, (a) ? """ : "\""); break; |
704 |
case '\n': *dlen += sprintf(*dst + *dlen, (a) ? "
" : "\n"); break; |
705 |
case '\t': *dlen += sprintf(*dst + *dlen, (a) ? "	" : "\t"); break; |
706 |
case '\r': *dlen += sprintf(*dst + *dlen, "
"); break; |
707 |
default: (*dst)[(*dlen)++] = *s; |
708 |
} |
709 |
} |
710 |
return *dst; |
711 |
} |
712 |
|
713 |
/* Recursively converts each tag to xml appending it to *s. Reallocates *s if */ |
714 |
/* its length excedes max. start is the location of the previous tag in the */ |
715 |
/* parent tag's character content. Returns *s. */ |
716 |
char *ezxml_toxml_r(ezxml_t xml, char **s, size_t *len, size_t *max, |
717 |
size_t start, char ***attr) |
718 |
{ |
719 |
int i, j; |
720 |
char *txt = (xml->parent) ? xml->parent->txt : ""; |
721 |
size_t off = 0; |
722 |
|
723 |
/* parent character content up to this tag */ |
724 |
*s = ezxml_ampencode(txt + start, xml->off - start, s, len, max, 0); |
725 |
|
726 |
while (*len + strlen(xml->name) + 4 > *max) /* reallocate s */ |
727 |
*s = realloc(*s, *max += EZXML_BUFSIZE); |
728 |
|
729 |
*len += sprintf(*s + *len, "<%s", xml->name); /* open tag */ |
730 |
for (i = 0; xml->attr[i]; i += 2) { /* tag attributes */ |
731 |
if (ezxml_attr(xml, xml->attr[i]) != xml->attr[i + 1]) continue; |
732 |
while (*len + strlen(xml->attr[i]) + 7 > *max) /* reallocate s */ |
733 |
*s = realloc(*s, *max += EZXML_BUFSIZE); |
734 |
|
735 |
*len += sprintf(*s + *len, " %s=\"", xml->attr[i]); |
736 |
ezxml_ampencode(xml->attr[i + 1], -1, s, len, max, 1); |
737 |
*len += sprintf(*s + *len, "\""); |
738 |
} |
739 |
|
740 |
for (i = 0; attr[i] && strcmp(attr[i][0], xml->name); i++); |
741 |
for (j = 1; attr[i] && attr[i][j]; j += 3) { /* default attributes */ |
742 |
if (! attr[i][j + 1] || ezxml_attr(xml, attr[i][j]) != attr[i][j + 1]) |
743 |
continue; /* skip duplicates and non-values */ |
744 |
while (*len + strlen(attr[i][j]) + 7 > *max) /* reallocate s */ |
745 |
*s = realloc(*s, *max += EZXML_BUFSIZE); |
746 |
|
747 |
*len += sprintf(*s + *len, " %s=\"", attr[i][j]); |
748 |
ezxml_ampencode(attr[i][j + 1], -1, s, len, max, 1); |
749 |
*len += sprintf(*s + *len, "\""); |
750 |
} |
751 |
*len += sprintf(*s + *len, ">"); |
752 |
|
753 |
*s = (xml->child) ? ezxml_toxml_r(xml->child, s, len, max, 0, attr) /*child */ |
754 |
: ezxml_ampencode(xml->txt, -1, s, len, max, 0); /*data */ |
755 |
|
756 |
while (*len + strlen(xml->name) + 4 > *max) /* reallocate s */ |
757 |
*s = realloc(*s, *max += EZXML_BUFSIZE); |
758 |
|
759 |
*len += sprintf(*s + *len, "</%s>", xml->name); /* close tag */ |
760 |
|
761 |
while (txt[off] && off < xml->off) off++; /* make sure off is within bounds */ |
762 |
return (xml->ordered) ? ezxml_toxml_r(xml->ordered, s, len, max, off, attr) |
763 |
: ezxml_ampencode(txt + off, -1, s, len, max, 0); |
764 |
} |
765 |
|
766 |
/* Converts an ezxml structure back to xml. Returns a string of xml data that */ |
767 |
/* must be freed. */ |
768 |
char *ezxml_toxml(ezxml_t xml) |
769 |
{ |
770 |
ezxml_t p = (xml) ? xml->parent : NULL, o = (xml) ? xml->ordered : NULL; |
771 |
ezxml_root_t root = (ezxml_root_t)xml; |
772 |
size_t len = 0, max = EZXML_BUFSIZE; |
773 |
char *s = strcpy(malloc(max), ""), *t, *n; |
774 |
int i, j, k; |
775 |
|
776 |
if (! xml || ! xml->name) return realloc(s, len + 1); |
777 |
while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; /* root tag */ |
778 |
|
779 |
for (i = 0; ! p && root->pi[i]; i++) { /* pre-root processing instructions */ |
780 |
for (k = 2; root->pi[i][k - 1]; k++); |
781 |
for (j = 1; (n = root->pi[i][j]); j++) { |
782 |
if (root->pi[i][k][j - 1] == '>') continue; /* not pre-root */ |
783 |
while (len + strlen(t = root->pi[i][0]) + strlen(n) + 7 > max) |
784 |
s = realloc(s, max += EZXML_BUFSIZE); |
785 |
len += sprintf(s + len, "<?%s%s%s?>\n", t, *n ? " " : "", n); |
786 |
} |
787 |
} |
788 |
|
789 |
xml->parent = xml->ordered = NULL; |
790 |
s = ezxml_toxml_r(xml, &s, &len, &max, 0, root->attr); |
791 |
xml->parent = p; |
792 |
xml->ordered = o; |
793 |
|
794 |
for (i = 0; ! p && root->pi[i]; i++) { /* post-root processing instructions */ |
795 |
for (k = 2; root->pi[i][k - 1]; k++); |
796 |
for (j = 1; (n = root->pi[i][j]); j++) { |
797 |
if (root->pi[i][k][j - 1] == '<') continue; /* not post-root */ |
798 |
while (len + strlen(t = root->pi[i][0]) + strlen(n) + 7 > max) |
799 |
s = realloc(s, max += EZXML_BUFSIZE); |
800 |
len += sprintf(s + len, "\n<?%s%s%s?>", t, *n ? " " : "", n); |
801 |
} |
802 |
} |
803 |
return realloc(s, len + 1); |
804 |
} |
805 |
|
806 |
/* free the memory allocated for the ezxml structure */ |
807 |
void ezxml_free(ezxml_t xml) |
808 |
{ |
809 |
ezxml_root_t root = (ezxml_root_t)xml; |
810 |
int i, j; |
811 |
char **a, *s; |
812 |
|
813 |
if (! xml) return; |
814 |
ezxml_free(xml->child); |
815 |
ezxml_free(xml->ordered); |
816 |
|
817 |
if (! xml->parent) { /* free root tag allocations */ |
818 |
for (i = 10; root->ent[i]; i += 2) /* 0 - 9 are default entites (<>&"') */ |
819 |
if ((s = root->ent[i + 1]) < root->s || s > root->e) free(s); |
820 |
free(root->ent); /* free list of general entities */ |
821 |
|
822 |
for (i = 0; (a = root->attr[i]); i++) { |
823 |
for (j = 1; a[j++]; j += 2) /* free malloced attribute values */ |
824 |
if (a[j] && (a[j] < root->s || a[j] > root->e)) free(a[j]); |
825 |
free(a); |
826 |
} |
827 |
if (root->attr[0]) free(root->attr); /* free default attribute list */ |
828 |
|
829 |
for (i = 0; root->pi[i]; i++) { |
830 |
for (j = 1; root->pi[i][j]; j++); |
831 |
free(root->pi[i][j + 1]); |
832 |
free(root->pi[i]); |
833 |
} |
834 |
if (root->pi[0]) free(root->pi); /* free processing instructions */ |
835 |
|
836 |
if (root->len == -1) free(root->m); /* malloced xml data */ |
837 |
#ifndef EZXML_NOMMAP |
838 |
else if (root->len) munmap(root->m, root->len); /* mem mapped xml data */ |
839 |
#endif /* EZXML_NOMMAP */ |
840 |
if (root->u) free(root->u); /* utf8 conversion */ |
841 |
} |
842 |
|
843 |
ezxml_free_attr(xml->attr); /* tag attributes */ |
844 |
if ((xml->flags & EZXML_TXTM)) free(xml->txt); /* character content */ |
845 |
if ((xml->flags & EZXML_NAMEM)) free(xml->name); /* tag name */ |
846 |
free(xml); |
847 |
} |
848 |
|
849 |
/* return parser error message or empty string if none */ |
850 |
const char *ezxml_error(ezxml_t xml) |
851 |
{ |
852 |
while (xml && xml->parent) xml = xml->parent; /* find root tag */ |
853 |
return (xml) ? ((ezxml_root_t)xml)->err : ""; |
854 |
} |
855 |
|
856 |
/* returns a new empty ezxml structure with the given root tag name */ |
857 |
ezxml_t ezxml_new(const char *name) |
858 |
{ |
859 |
static char *ent[] = { "lt;", "<", "gt;", ">", "quot;", """, |
860 |
"apos;", "'", "amp;", "&", NULL }; |
861 |
ezxml_root_t root = (ezxml_root_t)memset(malloc(sizeof(struct ezxml_root)), |
862 |
'\0', sizeof(struct ezxml_root)); |
863 |
root->xml.name = (char *)name; |
864 |
root->cur = &root->xml; |
865 |
strcpy(root->err, root->xml.txt = ""); |
866 |
root->ent = memcpy(malloc(sizeof(ent)), ent, sizeof(ent)); |
867 |
root->attr = root->pi = (char ***)(root->xml.attr = EZXML_NIL); |
868 |
return &root->xml; |
869 |
} |
870 |
|
871 |
/* inserts an existing tag into an ezxml structure */ |
872 |
ezxml_t ezxml_insert(ezxml_t xml, ezxml_t dest, size_t off) |
873 |
{ |
874 |
ezxml_t cur, prev, head; |
875 |
|
876 |
xml->next = xml->sibling = xml->ordered = NULL; |
877 |
xml->off = off; |
878 |
xml->parent = dest; |
879 |
|
880 |
if ((head = dest->child)) { /* already have sub tags */ |
881 |
if (head->off <= off) { /* not first subtag */ |
882 |
for (cur = head; cur->ordered && cur->ordered->off <= off; |
883 |
cur = cur->ordered); |
884 |
xml->ordered = cur->ordered; |
885 |
cur->ordered = xml; |
886 |
} |
887 |
else { /* first subtag */ |
888 |
xml->ordered = head; |
889 |
dest->child = xml; |
890 |
} |
891 |
|
892 |
for (cur = head, prev = NULL; cur && strcmp(cur->name, xml->name); |
893 |
prev = cur, cur = cur->sibling); /* find tag type */ |
894 |
if (cur && cur->off <= off) { /* not first of type */ |
895 |
while (cur->next && cur->next->off <= off) cur = cur->next; |
896 |
xml->next = cur->next; |
897 |
cur->next = xml; |
898 |
} |
899 |
else { /* first tag of this type */ |
900 |
if (prev && cur) prev->sibling = cur->sibling; /* remove old first */ |
901 |
xml->next = cur; /* old first tag is now next */ |
902 |
for (cur = head, prev = NULL; cur && cur->off <= off; |
903 |
prev = cur, cur = cur->sibling); /* new sibling insert point */ |
904 |
xml->sibling = cur; |
905 |
if (prev) prev->sibling = xml; |
906 |
} |
907 |
} |
908 |
else dest->child = xml; /* only sub tag */ |
909 |
|
910 |
return xml; |
911 |
} |
912 |
|
913 |
/* Adds a child tag. off is the offset of the child tag relative to the start */ |
914 |
/* of the parent tag's character content. Returns the child tag. */ |
915 |
ezxml_t ezxml_add_child(ezxml_t xml, const char *name, size_t off) |
916 |
{ |
917 |
ezxml_t child; |
918 |
|
919 |
if (! xml) return NULL; |
920 |
child = (ezxml_t)memset(malloc(sizeof(struct ezxml)), '\0', |
921 |
sizeof(struct ezxml)); |
922 |
child->name = (char *)name; |
923 |
child->attr = EZXML_NIL; |
924 |
child->txt = ""; |
925 |
|
926 |
return ezxml_insert(child, xml, off); |
927 |
} |
928 |
|
929 |
/* sets the character content for the given tag and returns the tag */ |
930 |
ezxml_t ezxml_set_txt(ezxml_t xml, const char *txt) |
931 |
{ |
932 |
if (! xml) return NULL; |
933 |
if (txt == xml->txt) return xml; |
934 |
if (xml->flags & EZXML_TXTM) free(xml->txt); /* existing txt was malloced */ |
935 |
xml->flags &= ~EZXML_TXTM; |
936 |
xml->txt = (char *)txt; |
937 |
return xml; |
938 |
} |
939 |
|
940 |
/* add text to the current character content, allocating memory as needed (GW) */ |
941 |
ezxml_t ezxml_add_txt(ezxml_t xml, const char *txt) |
942 |
{ |
943 |
int len; |
944 |
if (! xml) return NULL; |
945 |
if (!*txt) return xml; |
946 |
len = strlen(xml->txt) + strlen(txt) + 1; |
947 |
if (xml->flags & EZXML_TXTM) { |
948 |
xml->txt = (char *)realloc(xml->txt, len); |
949 |
} else { |
950 |
xml->txt = strcpy((char *)malloc(len), xml->txt); |
951 |
xml->flags |= EZXML_TXTM; |
952 |
} |
953 |
strcat(xml->txt, txt); |
954 |
return xml; |
955 |
} |
956 |
|
957 |
/* Sets the given tag attribute or adds a new attribute if not found. A value */ |
958 |
/* of NULL will remove the specified attribute. Returns the tag given. */ |
959 |
ezxml_t ezxml_set_attr(ezxml_t xml, const char *name, const char *value) |
960 |
{ |
961 |
int l = 0, c; |
962 |
|
963 |
if (! xml) return NULL; |
964 |
while (xml->attr[l] && strcmp(xml->attr[l], name)) l += 2; |
965 |
if (! xml->attr[l]) { /* not found, add as new attribute */ |
966 |
if (! value) return xml; /* nothing to do */ |
967 |
if (xml->attr == EZXML_NIL) { /* first attribute */ |
968 |
xml->attr = malloc(4 * sizeof(char *)); |
969 |
xml->attr[1] = strdup(""); /* empty list of malloced names/vals */ |
970 |
} |
971 |
else xml->attr = realloc(xml->attr, (l + 4) * sizeof(char *)); |
972 |
|
973 |
xml->attr[l] = (char *)name; /* set attribute name */ |
974 |
xml->attr[l + 2] = NULL; /* null terminate attribute list */ |
975 |
xml->attr[l + 3] = realloc(xml->attr[l + 1], |
976 |
(c = strlen(xml->attr[l + 1])) + 2); |
977 |
strcpy(xml->attr[l + 3] + c, " "); /* set name/value as not malloced */ |
978 |
if (xml->flags & EZXML_DUP) xml->attr[l + 3][c] = EZXML_NAMEM; |
979 |
} |
980 |
else if (xml->flags & EZXML_DUP) free((char *)name); /* name was strduped */ |
981 |
|
982 |
for (c = l; xml->attr[c]; c += 2); /* find end of attribute list */ |
983 |
if (xml->attr[c + 1][l / 2] & EZXML_TXTM) free(xml->attr[l + 1]); /*old val */ |
984 |
if (xml->flags & EZXML_DUP) xml->attr[c + 1][l / 2] |= EZXML_TXTM; |
985 |
else xml->attr[c + 1][l / 2] &= ~EZXML_TXTM; |
986 |
|
987 |
if (value) xml->attr[l + 1] = (char *)value; /* set attribute value */ |
988 |
else { /* remove attribute */ |
989 |
if (xml->attr[c + 1][l / 2] & EZXML_NAMEM) free(xml->attr[l]); |
990 |
memmove(xml->attr + l, xml->attr + l + 2, (c - l + 2) * sizeof(char*)); |
991 |
xml->attr = realloc(xml->attr, (c + 2) * sizeof(char *)); |
992 |
memmove(xml->attr[c + 1] + (l / 2), xml->attr[c + 1] + (l / 2) + 1, |
993 |
(c / 2) - (l / 2)); /* fix list of which name/vals are malloced */ |
994 |
} |
995 |
xml->flags &= ~EZXML_DUP; /* clear strdup() flag */ |
996 |
return xml; |
997 |
} |
998 |
|
999 |
/* sets a flag for the given tag and returns the tag */ |
1000 |
ezxml_t ezxml_set_flag(ezxml_t xml, short flag) |
1001 |
{ |
1002 |
if (xml) xml->flags |= flag; |
1003 |
return xml; |
1004 |
} |
1005 |
|
1006 |
/* removes a tag along with its subtags without freeing its memory */ |
1007 |
ezxml_t ezxml_cut(ezxml_t xml) |
1008 |
{ |
1009 |
ezxml_t cur; |
1010 |
|
1011 |
if (! xml) return NULL; /* nothing to do */ |
1012 |
if (xml->next) xml->next->sibling = xml->sibling; /* patch sibling list */ |
1013 |
|
1014 |
if (xml->parent) { /* not root tag */ |
1015 |
cur = xml->parent->child; /* find head of subtag list */ |
1016 |
if (cur == xml) xml->parent->child = xml->ordered; /* first subtag */ |
1017 |
else { /* not first subtag */ |
1018 |
while (cur->ordered != xml) cur = cur->ordered; |
1019 |
cur->ordered = cur->ordered->ordered; /* patch ordered list */ |
1020 |
|
1021 |
cur = xml->parent->child; /* go back to head of subtag list */ |
1022 |
if (strcmp(cur->name, xml->name)) { /* not in first sibling list */ |
1023 |
while (strcmp(cur->sibling->name, xml->name)) |
1024 |
cur = cur->sibling; |
1025 |
if (cur->sibling == xml) { /* first of a sibling list */ |
1026 |
cur->sibling = (xml->next) ? xml->next |
1027 |
: cur->sibling->sibling; |
1028 |
} |
1029 |
else cur = cur->sibling; /* not first of a sibling list */ |
1030 |
} |
1031 |
|
1032 |
while (cur->next && cur->next != xml) cur = cur->next; |
1033 |
if (cur->next) cur->next = cur->next->next; /* patch next list */ |
1034 |
} |
1035 |
} |
1036 |
xml->ordered = xml->sibling = xml->next = NULL; |
1037 |
return xml; |
1038 |
} |
1039 |
|
1040 |
#ifdef EZXML_TEST /* test harness */ |
1041 |
int main(int argc, char **argv) |
1042 |
{ |
1043 |
ezxml_t xml; |
1044 |
char *s; |
1045 |
int i; |
1046 |
|
1047 |
if (argc != 2) return fprintf(stderr, "usage: %s xmlfile\n", argv[0]); |
1048 |
|
1049 |
xml = ezxml_parse_file(argv[1]); |
1050 |
printf("%s\n", (s = ezxml_toxml(xml))); |
1051 |
free(s); |
1052 |
i = fprintf(stderr, "%s", ezxml_error(xml)); |
1053 |
ezxml_free(xml); |
1054 |
return (i) ? 1 : 0; |
1055 |
} |
1056 |
#endif /* EZXML_TEST */ |