mirror of
https://github.com/owntone/owntone-server.git
synced 2024-12-26 23:25:56 -05:00
Remove ezxml in favor of home-built saxish parser
This commit is contained in:
Ron Pedde
parent
2bb3bbe7d5
commit
e80fc585c9
@ -36,7 +36,7 @@ mt_daapd_SOURCES = main.c daapd.h rend.h uici.c uici.h webserver.c \
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mp3-scanner.h mp3-scanner.c rend-unix.h strcasestr.c strcasestr.h \
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mp3-scanner.h mp3-scanner.c rend-unix.h strcasestr.c strcasestr.h \
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strsep.c dynamic-art.c dynamic-art.h query.c query.h ssc.c ssc.h \
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strsep.c dynamic-art.c dynamic-art.h query.c query.h ssc.c ssc.h \
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db-generic.c db-generic.h dispatch.c dispatch.h wma.c \
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db-generic.c db-generic.h dispatch.c dispatch.h wma.c \
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scan-xml.c ezxml.c ezxml.h \
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scan-xml.c rxml.c rxml.h \
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$(PRENDSRC) $(ORENDSRC) $(HRENDSRC) $(OGGVORBISSRC) $(FLACSRC) \
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$(PRENDSRC) $(ORENDSRC) $(HRENDSRC) $(OGGVORBISSRC) $(FLACSRC) \
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$(SQLITEDB)
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$(SQLITEDB)
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712
src/ezxml.c
712
src/ezxml.c
@ -1,712 +0,0 @@
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/* ezxml.c
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*
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* Copyright 2005 Aaron Voisine <aaron@voisine.org>
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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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#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 <unistd.h>
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#include <sys/types.h>
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#ifndef EZXML_NOMMAP
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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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#define EZXML_TXTM 0x80 // flag value meaning txt was malloced
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#define EZXML_WS "\t\r\n " // whitespace
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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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void *m; // original xml string
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size_t len; // length of allocated memory for mmap, or -1 for malloc
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void *u; // UTF-8 conversion of string if original was UTF-16
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const char *err; // error string
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char ***pi; // processing instructions
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};
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const char *EZXML_NOATTR[] = { NULL }; // empty tag attribute list
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// called when parser finds close of tag
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#define ezxml_close_tag(root) root->cur = root->cur->parent;
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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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// 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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// 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;
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if (! xml) return NULL;
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while (xml->attr[i] && strcmp(attr, xml->attr[i])) i += 2;
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return (xml->attr[i]) ? xml->attr[i + 1] : NULL;
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}
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// same as ezxml_get but takes an alredy 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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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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// Traverses the xml tree to retrive 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 ret;
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va_start(ap, xml);
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ret = ezxml_vget(xml, ap);
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va_end(ap);
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return ret;
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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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static const char *nopi = NULL;
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ezxml_root_t root;
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int i = 0;
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while (xml->parent) xml = xml->parent;
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root = (ezxml_root_t)xml;
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if (! root->pi) return &nopi;
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while (root->pi[i] && strcmp(target, root->pi[i][0])) i++;
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return (root->pi[i]) ? (const char **)root->pi[i] + 1 : &nopi;
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}
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// Converts \r or \r\n to a single \n. If decode is non-zero, decodes ampersand
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// sequences in place. Returns s.
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char *ezxml_decode(char *s, int decode)
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{
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int b;
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char *e, *ret = s;
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long c, d;
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for (;;) {
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while (*s && *s != '\r' && *s != '&') s++;
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if (! *s) return ret;
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else if (*s == '\r') {
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*(s++) = '\n';
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if (*s == '\n') memmove(s, (s + 1), strlen(s));
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continue;
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}
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else if (! decode) { s++; continue; }
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else if (! strncmp(s, "<", 4)) *(s++) = '<';
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else if (! strncmp(s, ">", 4)) *(s++) = '>';
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else if (! strncmp(s, """, 6)) *(s++) = '"';
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else if (! strncmp(s, "'", 6)) *(s++) = '\'';
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else if (! strncmp(s, "&", 5)) s++;
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else if (! strncmp(s, "&#", 2)) {
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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 &#nnn; sequence
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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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else { s++; continue; }
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memmove(s, strchr(s, ';') + 1, strlen(strchr(s, ';')));
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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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if (xml->name) xml = ezxml_add_child(xml, name, strlen(xml->txt));
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else xml->name = name;
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xml->attr = (const char **)attr;
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root->cur = xml;
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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, short decode)
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{
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ezxml_t xml = root->cur;
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size_t l;
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if (! xml || ! xml->name || ! len) return;
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s[len] = '\0';
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ezxml_decode(s, decode);
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if (! *(xml->txt)) xml->txt = s;
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else { // allocate our own memory and make a copy
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l = strlen(xml->txt);
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if (! (xml->flags & EZXML_TXTM)) {
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xml->txt = strcpy(malloc(l + len + 1), xml->txt);
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xml->flags |= EZXML_TXTM;
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}
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else xml->txt = realloc(xml->txt, l + len + 1);
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strcpy(xml->txt + l, s);
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}
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}
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// called when the parser finds an xml processing instruction
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void ezxml_proc_inst(ezxml_root_t root, char *s, size_t len)
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{
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int i = 0, j = 1;
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char *target = s;
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s[len] = '\0'; // null terminate instruction
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*(s += strcspn(s, EZXML_WS)) = '\0'; // null terminate target
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s += strspn(s + 1, EZXML_WS) + 1; // skip whitespace after target
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if (! root->pi) *(root->pi = malloc(sizeof(char**))) = NULL;
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while (root->pi[i] && strcmp(target, root->pi[i][0])) i++;
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if (! root->pi[i]) { // new target
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root->pi = realloc(root->pi, sizeof(char **) * (i + 2));
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root->pi[i] = malloc(sizeof(char *) * 2);
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root->pi[i][0] = target;
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root->pi[i][1] = (char *)(root->pi[i + 1] = NULL); // terminate pi list
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}
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while (root->pi[i][j]) j++;
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root->pi[i] = realloc(root->pi[i], sizeof(char *) * (j + 2));
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root->pi[i][j] = s;
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root->pi[i][j + 1] = NULL;
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}
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// set an error string and return root
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ezxml_t ezxml_seterr(ezxml_root_t root, const char *err)
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{
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root->err = err;
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return (ezxml_t)root;
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}
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// converts a UTF-16 string to UTF-8, returns a new string the must be freed or
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// NULL if no conversion was needed
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char *ezxml_to_utf8(char **s, size_t *len)
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{
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char *u;
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size_t l = 0, sl, max = *len;
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long c, c2;
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int b, be = (**s == '\xFE') ? 1 : (**s == '\xFF') ? 0 : -1;
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if (be == -1) return NULL; // not UTF-16
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u = malloc(max);
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for (sl = 2; sl < *len - 1; sl += 2) {
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c = (be) ? ((long)(*s)[sl] << 8) | (*s)[sl + 1] : // big-endian
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((long)(*s)[sl + 1] << 8) | (*s)[sl]; // little-endian
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if (c >= 0xD800 && c <= 0xDFFF && (sl += 2) < *len - 1) { // high-half
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c2 = (be) ? ((long)(*s)[sl] << 8) | (*s)[sl + 1] : // big-endian
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((long)(*s)[sl + 1] << 8) | (*s)[sl]; // little-endian
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c = (((c & 0x3FF) << 10) | (c2 & 0x3FF)) + 0x10000;
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}
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while (l + 6 > max) u = realloc(u, max += EZXML_BUFSIZE);
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if (c < 0x80) u[l++] = c; // US-ASCII subset
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else { // multi-byte UTF-8 sequence
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for (b = 0, c2 = c; c2; c2 /= 2) b++; // bits in c
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b = (b - 2) / 5; // bytes in payload;
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u[l++] = (0xFF << (7 - b)) | (c >> (6 * b)); // head
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while (b) u[l++] = 0x80 | ((c >> (6 * --b)) & 0x3F); // payload
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}
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}
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return *s = realloc(u, *len = l);
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}
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// parse the given xml string and return an ezxml structure
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ezxml_t ezxml_parse_str(char *s, size_t len)
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{
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ezxml_root_t root = (ezxml_root_t)ezxml_new(NULL);
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char *d, **attr, q, e;
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int l;
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root->m = s;
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if (! len) return ezxml_seterr(root, "root tag missing");
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root->u = ezxml_to_utf8(&s, &len);
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e = s[len - 1];
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s[len - 1] = '\0';
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while (*s && *s != '<') s++; // find first tag
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if (! *s) return ezxml_seterr(root, "root tag missing");
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for (;;) {
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attr = (char **)EZXML_NOATTR;
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d = ++s;
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if (isalpha(*s) || *s == '_' || *s == ':' || *s < '\0') { // new tag
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if (! root->cur) return ezxml_seterr(root, "unmatched closing tag");
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s += strcspn(s, EZXML_WS "/>");
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while (isspace(*s)) *(s++) = '\0';
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l = 0;
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while (*s && *s != '/' && *s != '>') { // new tag attribute
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attr = (! l) ? malloc(3 * sizeof(char *)) :
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realloc(attr, (l + 3) * sizeof(char *));
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attr[l] = s;
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s += strcspn(s, EZXML_WS "=/>");
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if (*s == '=' || isspace(*s)) {
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*(s++) = '\0';
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q = *(s += strspn(s, EZXML_WS "="));
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if (q == '"' || q == '\'') { // attribute value
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attr[l + 1] = ++s;
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while (*s && *s != q) s++;
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if (*s) *(s++) = '\0';
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else {
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free(attr);
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return ezxml_seterr(root, (q == '"') ?
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"missing \"" : "missing '");
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}
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ezxml_decode(attr[l + 1], 1);
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}
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else attr[l + 1] = "";
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}
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else attr[l + 1] = "";
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attr[(l += 2)] = NULL;
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while (isspace(*s)) s++;
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}
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if (*s == '/') { // self closing tag
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*(s++) = '\0';
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if ((*s && *s != '>') || (! *s && e != '>')) {
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if (l) free(attr);
|
|
||||||
return ezxml_seterr(root, "missing >");
|
|
||||||
}
|
|
||||||
ezxml_open_tag(root, d, attr);
|
|
||||||
ezxml_close_tag(root);
|
|
||||||
}
|
|
||||||
else if (*s == '>' || (! *s && e == '>')) { // open tag
|
|
||||||
q = *s;
|
|
||||||
*s = '\0';
|
|
||||||
ezxml_open_tag(root, d, attr);
|
|
||||||
*s = q;
|
|
||||||
}
|
|
||||||
else {
|
|
||||||
if (l) free(attr);
|
|
||||||
return ezxml_seterr(root, "missing >");
|
|
||||||
}
|
|
||||||
}
|
|
||||||
else if (*s == '/') { // close tag
|
|
||||||
if (! root->cur) return ezxml_seterr(root, "unmatched closing tag");
|
|
||||||
ezxml_close_tag(root);
|
|
||||||
while (*s && *s != '>') s++;
|
|
||||||
if (! *s && e != '>') return ezxml_seterr(root, "missing >");
|
|
||||||
}
|
|
||||||
else if (! strncmp(s, "!--", 3)) { // comment
|
|
||||||
do { s = strstr(s, "--"); } while (s && *(s += 2) && *s != '>');
|
|
||||||
if (! s || (! *s && e != '>'))
|
|
||||||
return ezxml_seterr(root, "unclosed <!--");
|
|
||||||
}
|
|
||||||
else if (! strncmp(s, "![CDATA[", 8)) { // cdata
|
|
||||||
if ((s = strstr(s, "]]>")))
|
|
||||||
ezxml_char_content(root, d + 8, (s += 2) - d - 10, 0);
|
|
||||||
else return ezxml_seterr(root, "unclosed <![CDATA[");
|
|
||||||
}
|
|
||||||
else if (! strncmp(s, "!DOCTYPE", 8)) { // skip <!DOCTYPE declarations
|
|
||||||
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_seterr(root, "unclosed <!DOCTYPE");
|
|
||||||
}
|
|
||||||
else if (*s == '?') { // <?...?> processing instructions
|
|
||||||
do { s = strchr(s, '?'); } while (s && *(++s) && *s != '>');
|
|
||||||
if (! s || (! *s && e != '>'))
|
|
||||||
return ezxml_seterr(root, "unclosed <?");
|
|
||||||
else ezxml_proc_inst(root, d + 1, s - d - 2);
|
|
||||||
}
|
|
||||||
else return ezxml_seterr(root, "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, 1);
|
|
||||||
else break;
|
|
||||||
}
|
|
||||||
else if (! *s) break;
|
|
||||||
}
|
|
||||||
|
|
||||||
return (root->cur) ? ezxml_seterr(root, (root->cur->name) ? "unclosed tag" :
|
|
||||||
"root tag missing") : (ezxml_t)root;
|
|
||||||
}
|
|
||||||
|
|
||||||
// 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 ret;
|
|
||||||
size_t l, len = 0;
|
|
||||||
void *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;
|
|
||||||
|
|
||||||
ret = (ezxml_root_t)ezxml_parse_str(s, len);
|
|
||||||
ret->len = -1; // so we know to free s in ezxml_free()
|
|
||||||
return (ezxml_t)ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
// 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 ret;
|
|
||||||
struct stat stat;
|
|
||||||
size_t len, ps = (size_t)sysconf(_SC_PAGESIZE);
|
|
||||||
void *m;
|
|
||||||
|
|
||||||
if (fd < 0) return NULL;
|
|
||||||
|
|
||||||
fstat(fd, &stat);
|
|
||||||
len = (stat.st_size + ps - 1) & ~(ps - 1); // round up to next page boundry
|
|
||||||
|
|
||||||
#ifndef EZXML_NOMMAP
|
|
||||||
if ((m = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0)) !=
|
|
||||||
MAP_FAILED) {
|
|
||||||
madvise(m, len, MADV_SEQUENTIAL); // optimize for sequential access
|
|
||||||
ret = (ezxml_root_t)ezxml_parse_str(m, stat.st_size);
|
|
||||||
madvise(m, ret->len = len, MADV_NORMAL); // put it back to normal
|
|
||||||
}
|
|
||||||
else { // mmap failed, read file into memory
|
|
||||||
#endif // EZXML_NOMMAP
|
|
||||||
len = read(fd, m = malloc(stat.st_size), stat.st_size);
|
|
||||||
ret = (ezxml_root_t)ezxml_parse_str(m, len);
|
|
||||||
ret->len = -1;
|
|
||||||
#ifndef EZXML_NOMMAP
|
|
||||||
}
|
|
||||||
#endif // EZXML_NOMMAP
|
|
||||||
|
|
||||||
return (ezxml_t)ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
// 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 ret = ezxml_parse_fd(fd);
|
|
||||||
|
|
||||||
if (fd >= 0) close(fd);
|
|
||||||
return ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Encodes ampersand sequences appending the results to dst, reallocating dst
|
|
||||||
// if it's length excedes max. Returns *dst.
|
|
||||||
char *ezxml_ampencode(const char *s, size_t len, char **dst, size_t *dlen,
|
|
||||||
size_t *max)
|
|
||||||
{
|
|
||||||
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, """); break;
|
|
||||||
default:
|
|
||||||
if (*s >= ' ' || *s < '\0' || *s == '\n' || *s == '\t')
|
|
||||||
(*dst)[(*dlen)++] = *s;
|
|
||||||
else *dlen += sprintf(*dst + *dlen, "&#%02d;", *s);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
return *dst;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Recursively converts each tag to xml appending it to s. Reallocates s if it's
|
|
||||||
// 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)
|
|
||||||
{
|
|
||||||
int i;
|
|
||||||
char *txt = (xml->parent) ? xml->parent->txt : "";
|
|
||||||
|
|
||||||
// parent character content up to this tag
|
|
||||||
ezxml_ampencode(txt + start, xml->off - start, s, len, max);
|
|
||||||
|
|
||||||
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
|
|
||||||
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);
|
|
||||||
*len += sprintf(*s + *len, "\"");
|
|
||||||
}
|
|
||||||
|
|
||||||
if (xml->child || *(xml->txt)) { // tag content
|
|
||||||
*len += sprintf(*s + *len, ">");
|
|
||||||
if (xml->child) ezxml_toxml_r(xml->child, s, len, max, 0);
|
|
||||||
else ezxml_ampencode(xml->txt, -1, s, len, max); // char content
|
|
||||||
|
|
||||||
while (*len + strlen(xml->name) + 4 > *max) // reallocate s
|
|
||||||
*s = realloc(*s, *max += EZXML_BUFSIZE);
|
|
||||||
|
|
||||||
*len += sprintf(*s + *len, "</%s>", xml->name); // close tag
|
|
||||||
}
|
|
||||||
else *len += sprintf(*s + *len, "/>"); // self closing tag
|
|
||||||
|
|
||||||
if (xml->ordered) return ezxml_toxml_r(xml->ordered, s, len, max, xml->off);
|
|
||||||
return ezxml_ampencode(txt + xml->off, -1, s, len, max);
|
|
||||||
}
|
|
||||||
|
|
||||||
// converts an ezxml structure back to xml, returning it as a string that must
|
|
||||||
// be freed
|
|
||||||
char *ezxml_toxml(ezxml_t xml)
|
|
||||||
{
|
|
||||||
ezxml_t p = xml->parent;
|
|
||||||
size_t len = 0, max = EZXML_BUFSIZE;
|
|
||||||
char *s = strcpy(malloc(max), "");
|
|
||||||
|
|
||||||
if (! xml || ! xml->name) return realloc(s, len + 1);
|
|
||||||
|
|
||||||
xml->parent = NULL;
|
|
||||||
ezxml_toxml_r(xml, &s, &len, &max, 0);
|
|
||||||
xml->parent = p;
|
|
||||||
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;
|
|
||||||
|
|
||||||
if (! xml) return;
|
|
||||||
|
|
||||||
ezxml_free(xml->child);
|
|
||||||
ezxml_free(xml->ordered);
|
|
||||||
|
|
||||||
if (! xml->parent) {
|
|
||||||
if (root->pi) {
|
|
||||||
for (i = 0; root->pi[i]; i++) free(root->pi[i]);
|
|
||||||
free(root->pi);
|
|
||||||
}
|
|
||||||
|
|
||||||
if (root->len == -1) free(root->m);
|
|
||||||
#ifndef EZXML_NOMMAP
|
|
||||||
else if (root->len) munmap(root->m, root->len);
|
|
||||||
#endif // EZXML_NOMMAP
|
|
||||||
|
|
||||||
if (root->u) free(root->u);
|
|
||||||
}
|
|
||||||
|
|
||||||
if (xml->attr[0]) free(xml->attr);
|
|
||||||
if ((xml->flags & EZXML_TXTM)) free(xml->txt);
|
|
||||||
free(xml);
|
|
||||||
}
|
|
||||||
|
|
||||||
// return parser error message or empty string if none
|
|
||||||
const char *ezxml_error(ezxml_t xml)
|
|
||||||
{
|
|
||||||
while (xml->parent) xml = xml->parent;
|
|
||||||
return ((ezxml_root_t)xml)->err;
|
|
||||||
}
|
|
||||||
|
|
||||||
// returns a new empty ezxml structure with the given root tag name
|
|
||||||
ezxml_t ezxml_new(const char *name)
|
|
||||||
{
|
|
||||||
ezxml_root_t root = (ezxml_root_t)memset(malloc(sizeof(struct ezxml_root)),
|
|
||||||
'\0', sizeof(struct ezxml_root));
|
|
||||||
|
|
||||||
root->xml.name = name;
|
|
||||||
root->xml.attr = EZXML_NOATTR;
|
|
||||||
root->cur = (ezxml_t)root;
|
|
||||||
root->err = root->xml.txt = "";
|
|
||||||
return (ezxml_t)root;
|
|
||||||
}
|
|
||||||
|
|
||||||
// adds a child tag. offset is the location of the child tag relative to the
|
|
||||||
// start of the parrent tag's character content. returns the child tag
|
|
||||||
ezxml_t ezxml_add_child(ezxml_t xml, const char *name, size_t offset)
|
|
||||||
{
|
|
||||||
ezxml_t sub, child = (ezxml_t)malloc(sizeof(struct ezxml));
|
|
||||||
|
|
||||||
if (xml->child) { // already have sub tags
|
|
||||||
sub = xml->child;
|
|
||||||
while (sub->ordered) sub = sub->ordered;
|
|
||||||
sub->ordered = child;
|
|
||||||
|
|
||||||
sub = xml->child;
|
|
||||||
while (sub->sibling && strcmp(sub->name, name)) sub = sub->sibling;
|
|
||||||
if (! strcmp(sub->name, name)) { // already have this tag type
|
|
||||||
while (sub->next) sub = sub->next;
|
|
||||||
sub->next = child;
|
|
||||||
}
|
|
||||||
else sub->sibling = child;
|
|
||||||
}
|
|
||||||
else xml->child = child; // first sub tag
|
|
||||||
|
|
||||||
// initialize new tag
|
|
||||||
child->name = name;
|
|
||||||
child->attr = EZXML_NOATTR;
|
|
||||||
child->off = offset;
|
|
||||||
child->parent = xml;
|
|
||||||
child->next = child->child = child->sibling = child->ordered = NULL;
|
|
||||||
child->txt = "";
|
|
||||||
child->flags = 0;
|
|
||||||
return child;
|
|
||||||
}
|
|
||||||
|
|
||||||
// sets the character content for the given tag
|
|
||||||
void ezxml_set_txt(ezxml_t xml, const char *txt)
|
|
||||||
{
|
|
||||||
if (xml->flags & EZXML_TXTM) { // existing txt was malloced
|
|
||||||
free(xml->txt);
|
|
||||||
xml->flags &= ~EZXML_TXTM;
|
|
||||||
}
|
|
||||||
xml->txt = (char *)txt;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Sets the given tag attribute or adds a new attribute if not found. A value of
|
|
||||||
// NULL will remove the specified attribute.
|
|
||||||
void ezxml_set_attr(ezxml_t xml, const char *name, const char *value)
|
|
||||||
{
|
|
||||||
int l = 0, c = 0;
|
|
||||||
|
|
||||||
while (xml->attr[l] && strcmp(xml->attr[l], name)) l += 2;
|
|
||||||
if (! xml->attr[l]) { // not found, add as new attribute
|
|
||||||
if (! value) return; // nothing to do
|
|
||||||
if (xml->attr == EZXML_NOATTR) xml->attr = malloc(3 * sizeof(char *));
|
|
||||||
else xml->attr = realloc(xml->attr, (l + 3) * sizeof(char *));
|
|
||||||
xml->attr[l] = name;
|
|
||||||
xml->attr[l + 2] = NULL;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (value) xml->attr[l + 1] = value; // set attribute
|
|
||||||
else { // remove attribute
|
|
||||||
while (xml->attr[l + 2 + c]) c += 2; // find end of attribute list
|
|
||||||
memmove(xml->attr + l, xml->attr + l + 2, (c + 1) * sizeof(char *));
|
|
||||||
xml->attr = realloc(xml->attr, (l + c + 1) * sizeof(char *));
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
// removes a tag along with all its subtags
|
|
||||||
void ezxml_remove(ezxml_t xml)
|
|
||||||
{
|
|
||||||
ezxml_t cur;
|
|
||||||
|
|
||||||
if (! xml) return; // 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
|
|
||||||
if (xml->next) cur->sibling = xml->next;
|
|
||||||
else cur->sibling = 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 = NULL;
|
|
||||||
ezxml_free(xml);
|
|
||||||
}
|
|
||||||
|
|
||||||
#ifdef EZXML_TEST // test harness
|
|
||||||
|
|
||||||
int main(int argc, char **argv)
|
|
||||||
{
|
|
||||||
ezxml_t xml;
|
|
||||||
char *s;
|
|
||||||
|
|
||||||
if (argc != 2) return fprintf(stderr, "usage: %s xmlfile\n", argv[0]);
|
|
||||||
|
|
||||||
xml = ezxml_parse_file(argv[1]);
|
|
||||||
printf("%s", (s = ezxml_toxml(xml)));
|
|
||||||
fprintf(stderr, "%s", ezxml_error(xml));
|
|
||||||
free(s);
|
|
||||||
ezxml_free(xml);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
#endif // EZXML_TEST
|
|
||||||
133
src/ezxml.h
133
src/ezxml.h
@ -1,133 +0,0 @@
|
|||||||
/* ezxml.h
|
|
||||||
*
|
|
||||||
* Copyright 2005 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.
|
|
||||||
*/
|
|
||||||
|
|
||||||
#ifndef _EZXML_H
|
|
||||||
#define _EZXML_H
|
|
||||||
|
|
||||||
#include <stdlib.h>
|
|
||||||
#include <stdio.h>
|
|
||||||
#include <stdarg.h>
|
|
||||||
#include <fcntl.h>
|
|
||||||
|
|
||||||
#ifdef __cplusplus
|
|
||||||
extern "C" {
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#define EZXML_BUFSIZE 1024
|
|
||||||
|
|
||||||
typedef struct ezxml *ezxml_t;
|
|
||||||
struct ezxml {
|
|
||||||
const char *name; // tag name
|
|
||||||
const char **attr; // tag attributes { name, value, name, value, ... NULL }
|
|
||||||
char *txt; // tag character content, empty string if none
|
|
||||||
size_t off; // tag offset in parent tag character content
|
|
||||||
ezxml_t next; // next tag with same name in this section at this depth
|
|
||||||
ezxml_t sibling; // next tag with different name in same section and depth
|
|
||||||
ezxml_t ordered; // next tag, same section and depth, in original order
|
|
||||||
ezxml_t child; // head of sub tag list, NULL if none
|
|
||||||
ezxml_t parent; // parent tag, NULL if current tag is root tag
|
|
||||||
short flags; // additional information, only used internally for now
|
|
||||||
};
|
|
||||||
|
|
||||||
// returns the next tag of the same name in the same section and depth or NULL
|
|
||||||
// if not found
|
|
||||||
#define ezxml_next(xml) xml->next
|
|
||||||
|
|
||||||
// returns the tag character content or empty string if none
|
|
||||||
#define ezxml_txt(xml) xml->txt
|
|
||||||
|
|
||||||
// Given a string of xml data and its length, parses it and creates an ezxml
|
|
||||||
// structure. For efficiency, modifies the data by adding null terminators
|
|
||||||
// and decoding ampersand sequences. If you don't want this, copy the data and
|
|
||||||
// pass in the copy. Returns NULL on failure.
|
|
||||||
ezxml_t ezxml_parse_str(char *s, size_t len);
|
|
||||||
|
|
||||||
// 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);
|
|
||||||
|
|
||||||
// a wrapper for ezxml_parse_fd() that accepts a file name
|
|
||||||
ezxml_t ezxml_parse_file(const char *file);
|
|
||||||
|
|
||||||
// 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);
|
|
||||||
|
|
||||||
// returns the first child tag (one level deeper) with the given name or NULL if
|
|
||||||
// not found
|
|
||||||
ezxml_t ezxml_child(ezxml_t xml, const char *name);
|
|
||||||
|
|
||||||
// Returns the Nth tag with the same name in the same section at the same depth
|
|
||||||
// or NULL if not found. An index of 0 returns the tag given.
|
|
||||||
ezxml_t ezxml_idx(ezxml_t xml, int idx);
|
|
||||||
|
|
||||||
// returns the value of the requested tag attribute, or NULL if not found
|
|
||||||
const char *ezxml_attr(ezxml_t xml, const char *attr);
|
|
||||||
|
|
||||||
// Traverses the ezxml sturcture to retrive 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, ...);
|
|
||||||
|
|
||||||
// Converts an ezxml structure back to xml. Returns a string of xml data that
|
|
||||||
// must be freed.
|
|
||||||
char *ezxml_toxml(ezxml_t xml);
|
|
||||||
|
|
||||||
// returns a NULL terminated array of processing instructions for the given
|
|
||||||
// target
|
|
||||||
const char **ezxml_pi(ezxml_t xml, const char *target);
|
|
||||||
|
|
||||||
// frees the memory allocated for an ezxml structure
|
|
||||||
void ezxml_free(ezxml_t xml);
|
|
||||||
|
|
||||||
// returns parser error message or empty string if none
|
|
||||||
const char *ezxml_error(ezxml_t xml);
|
|
||||||
|
|
||||||
// returns a new empty ezxml structure with the given root tag name
|
|
||||||
ezxml_t ezxml_new(const char *name);
|
|
||||||
|
|
||||||
// Adds a child tag. offset is the location of the child tag relative to the
|
|
||||||
// start of the parrent tag's character content. Returns the child tag.
|
|
||||||
ezxml_t ezxml_add_child(ezxml_t xml, const char *name, size_t offset);
|
|
||||||
|
|
||||||
// sets the character content for the given tag
|
|
||||||
void ezxml_set_txt(ezxml_t xml, const char *txt);
|
|
||||||
|
|
||||||
// Sets the given tag attribute or adds a new attribute if not found. A value of
|
|
||||||
// NULL will remove the specified attribute.
|
|
||||||
void ezxml_set_attr(ezxml_t xml, const char *name, const char *value);
|
|
||||||
|
|
||||||
// removes a tag along with all its subtags
|
|
||||||
void ezxml_remove(ezxml_t xml);
|
|
||||||
|
|
||||||
#ifdef __cplusplus
|
|
||||||
}
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#endif // _EZXML_H
|
|
||||||
Loading…
Reference in New Issue
Block a user