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OpenFPGA/vpr7_x2p/libarchfpga/ezxml.c

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/* ezxml.c
*
* Copyright 2004-2006 Aaron Voisine <aaron@voisine.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef EZXML_NOMMAP
#define EZXML_NOMMAP
#endif /* EXXML_NOMMAP */
/* Ted Campbell, Aug 14 2007 */
#if defined(WIN32) || defined(_WIN32)
#include <io.h>
#endif /* WIN32 */
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <ctype.h>
/* Ted Campbell, Aug 14 2007 */
#if !defined(WIN32) && !defined(_WIN32)
#include <unistd.h>
#endif
#include <sys/types.h>
#ifndef EZXML_NOMMAP
#include <sys/mman.h>
#endif /* EZXML_NOMMAP */
#include <sys/stat.h>
#include "ezxml.h"
/* Ted Campbell, Aug 14, 2007 */
#include "util.h"
/* Ted Campbell, Aug 14, 2007 */
#if defined(WIN32) || defined(_WIN32)
#define snprintf _snprintf
#define open _open
#define read _read
#define write _write
#define close _close
#endif /* WIN32 */
#define EZXML_WS "\t\r\n " /* whitespace */
char *EZXML_NIL[] = { NULL }; /* empty, null terminated array of strings */
static ezxml_t ezxml_vget(ezxml_t xml, va_list ap);
static char *ezxml_decode(char *s, char **ent, char t);
static void ezxml_open_tag(ezxml_root_t root, int line, char *name, char **attr);
static void ezxml_char_content(ezxml_root_t root, char *s,
size_t len, char t);
static ezxml_t ezxml_close_tag(ezxml_root_t root, char *name, char *s);
static int ezxml_ent_ok(char *name, char *s, char **ent);
static void ezxml_proc_inst(ezxml_root_t root, char *s, size_t len);
static short ezxml_internal_dtd(ezxml_root_t root, char *s,
size_t len);
static char *ezxml_str2utf8(char **s, size_t * len);
static void ezxml_free_attr(char **attr);
static char *ezxml_ampencode(const char *s, size_t len, char **dst,
size_t * dlen, size_t * max, short a);
static char *ezxml_toxml_r(ezxml_t xml, char **s, size_t * len, size_t * max,
size_t start, char ***attr);
/* returns the first child tag with the given name or NULL if not found */
ezxml_t ezxml_child(ezxml_t xml, const char *name) {
xml = (xml) ? xml->child : NULL;
while (xml && strcmp(name, xml->name))
xml = xml->sibling;
return xml;
}
/* returns the Nth tag with the same name in the same subsection or NULL if not */
/* found */
ezxml_t ezxml_idx(ezxml_t xml, int idx) {
for (; xml && idx; idx--)
xml = xml->next;
return xml;
}
/* returns the value of the requested tag attribute or NULL if not found */
const char *
ezxml_attr(ezxml_t xml, const char *attr) {
int i = 0, j = 1;
ezxml_root_t root = (ezxml_root_t) xml;
if (!xml || !xml->attr)
return NULL;
while (xml->attr[i] && strcmp(attr, xml->attr[i]))
i += 2;
if (xml->attr[i])
return xml->attr[i + 1]; /* found attribute */
while (root->xml.parent)
root = (ezxml_root_t) root->xml.parent; /* root tag */
for (i = 0; root->attr[i] && strcmp(xml->name, root->attr[i][0]); i++)
;
if (!root->attr[i])
return NULL; /* no matching default attributes */
while (root->attr[i][j] && strcmp(attr, root->attr[i][j]))
j += 3;
return (root->attr[i][j]) ? root->attr[i][j + 1] : NULL; /* found default */
}
/* same as ezxml_get but takes an already initialized va_list */
ezxml_t ezxml_vget(ezxml_t xml, va_list ap) {
char *name = va_arg(ap, char *);
int idx = -1;
if (name && *name) {
idx = va_arg(ap, int);
xml = ezxml_child(xml, name);
}
return (idx < 0) ? xml : ezxml_vget(ezxml_idx(xml, idx), ap);
}
/* Traverses the xml tree to retrieve a specific subtag. Takes a variable */
/* length list of tag names and indexes. The argument list must be terminated */
/* by either an index of -1 or an empty string tag name. Example: */
/* title = ezxml_get(library, "shelf", 0, "book", 2, "title", -1); */
/* This retrieves the title of the 3rd book on the 1st shelf of library. */
/* Returns NULL if not found. */
ezxml_t ezxml_get(ezxml_t xml, ...) {
va_list ap;
ezxml_t r;
va_start(ap, xml);
r = ezxml_vget(xml, ap);
va_end(ap);
return r;
}
/* returns a null terminated array of processing instructions for the given */
/* target */
char **
ezxml_pi(ezxml_t xml, const char *target) {
ezxml_root_t root = (ezxml_root_t) xml;
int i = 0;
if (!root)
return EZXML_NIL;
while (root->xml.parent)
root = (ezxml_root_t) root->xml.parent; /* root tag */
while (root->pi[i] && strcmp(target, root->pi[i][0]))
i++; /* find target */
return ((root->pi[i]) ? root->pi[i] + 1 : EZXML_NIL);
}
/* set an error string and return root */
static ezxml_t ezxml_err(ezxml_root_t root, char *s, const char *err, ...) {
va_list ap;
int line = 1;
char *t, fmt[EZXML_ERRL];
for (t = root->s; t < s; t++)
if (*t == '\n')
line++;
snprintf(fmt, EZXML_ERRL, "[error near line %d]: %s", line, err);
va_start(ap, err);
vsnprintf(root->err, EZXML_ERRL, fmt, ap);
va_end(ap);
return &root->xml;
}
/* Recursively decodes entity and character references and normalizes new lines */
/* ent is a null terminated array of alternating entity names and values. set t */
/* to '&' for general entity decoding, '%' for parameter entity decoding, 'c' */
/* for cdata sections, ' ' for attribute normalization, or '*' for non-cdata */
/* attribute normalization. Returns s, or if the decoded string is longer than */
/* s, returns a malloced string that must be freed. */
/* Jason Luu June 22, 2010, Added line number support */
static char *
ezxml_decode(char *s, char **ent, char t) {
char *e, *r = s, *m = s;
long b, c, d, l;
for (; *s; s++) { /* normalize line endings */
while (*s == '\r') {
*(s++) = '\n';
if (*s == '\n') {
memmove(s, (s + 1), strlen(s));
}
}
}
for (s = r;;) {
while (*s && *s != '&' && (*s != '%' || t != '%') && !isspace(*s))
s++;
if (!*s)
break;
else if (t != 'c' && !strncmp(s, "&#", 2)) { /* character reference */
if (s[2] == 'x')
c = strtol(s + 3, &e, 16); /* base 16 */
else
c = strtol(s + 2, &e, 10); /* base 10 */
if (!c || *e != ';') {
s++;
continue;
}
/* not a character ref */
if (c < 0x80)
*(s++) = (char) c; /* US-ASCII subset */
else { /* multi-byte UTF-8 sequence */
for (b = 0, d = c; d; d /= 2)
b++; /* number of bits in c */
b = (b - 2) / 5; /* number of bytes in payload */
*(s++) = (char)((0xFF << (7 - b)) | (c >> (6 * b))); /* head */
while (b)
*(s++) = 0x80 | ((c >> (6 * --b)) & 0x3F); /* payload */
}
memmove(s, strchr(s, ';') + 1, strlen(strchr(s, ';')));
} else if ((*s == '&' && (t == '&' || t == ' ' || t == '*'))
|| (*s == '%' && t == '%')) { /* entity reference */
for (b = 0; ent[b] && strncmp(s + 1, ent[b], strlen(ent[b])); b +=
2)
; /* find entity in entity list */
if (ent[b++]) { /* found a match */
if ((c = strlen(ent[b])) - 1 > (e = strchr(s, ';')) - s) {
l = (d = (s - r)) + c + strlen(e); /* new length */
r = (r == m) ? strcpy((char*)malloc(l), r) : (char*)realloc(r, l);
e = strchr((s = r + d), ';'); /* fix up pointers */
}
memmove(s + c, e + 1, strlen(e)); /* shift rest of string */
strncpy(s, ent[b], c); /* copy in replacement text */
} else
s++; /* not a known entity */
} else if ((t == ' ' || t == '*') && isspace(*s))
*(s++) = ' ';
else
s++; /* no decoding needed */
}
if (t == '*') { /* normalize spaces for non-cdata attributes */
for (s = r; *s; s++) {
/* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
l = strspn(s, " ");
if (l)
memmove(s, s + l, strlen(s + l) + 1);
while (*s && *s != ' ')
s++;
}
if (--s >= r && *s == ' ')
*s = '\0'; /* trim any trailing space */
}
return r;
}
/* called when parser finds start of new tag */
/* Jason Luu June 22, 2010, Added line number support */
static void ezxml_open_tag(ezxml_root_t root, int line, char *name, char **attr) {
ezxml_t xml = root->cur;
if (xml->name)
xml = ezxml_add_child(xml, name, strlen(xml->txt));
else
xml->name = name; /* first open tag */
xml->line = line;
xml->attr = attr;
root->cur = xml; /* update tag insertion point */
}
/* called when parser finds character content between open and closing tag */
/* Jason Luu June 22, 2010, Added line number support */
static void ezxml_char_content(ezxml_root_t root, char *s,
size_t len, char t) {
ezxml_t xml = root->cur;
char *m = s;
size_t l;
if (!xml || !xml->name || !len)
return; /* sanity check */
s[len] = '\0'; /* null terminate text (calling functions anticipate this) */
len = strlen(s = ezxml_decode(s, root->ent, t)) + 1;
if (!*(xml->txt))
xml->txt = s; /* initial character content */
else { /* allocate our own memory and make a copy */
xml->txt = (xml->flags & EZXML_TXTM) /* allocate some space */
? (char*)realloc(xml->txt, (l = strlen(xml->txt)) + len) : strcpy((char*)malloc((l =
strlen(xml->txt)) + len), xml->txt);
strcpy(xml->txt + l, s); /* add new char content */
if (s != m)
free(s); /* free s if it was malloced by ezxml_decode() */
}
if (xml->txt != m)
ezxml_set_flag(xml, EZXML_TXTM);
}
/* called when parser finds closing tag */
static ezxml_t ezxml_close_tag(ezxml_root_t root, char *name, char *s) {
if (!root->cur || !root->cur->name || strcmp(name, root->cur->name))
return ezxml_err(root, s, "unexpected closing tag </%s>", name);
root->cur = root->cur->parent;
return NULL;
}
/* checks for circular entity references, returns non-zero if no circular */
/* references are found, zero otherwise */
static int ezxml_ent_ok(char *name, char *s, char **ent) {
int i;
for (;; s++) {
while (*s && *s != '&')
s++; /* find next entity reference */
if (!*s)
return 1;
if (!strncmp(s + 1, name, strlen(name)))
return 0; /* circular ref. */
for (i = 0; ent[i] && strncmp(ent[i], s + 1, strlen(ent[i])); i += 2)
;
if (ent[i] && !ezxml_ent_ok(name, ent[i + 1], ent))
return 0;
}
}
/* called when the parser finds a processing instruction */
static void ezxml_proc_inst(ezxml_root_t root, char *s, size_t len) {
int i = 0, j = 1;
char *target = s;
s[len] = '\0'; /* null terminate instruction */
if (*(s += strcspn(s, EZXML_WS))) {
*s = '\0'; /* null terminate target */
s += strspn(s + 1, EZXML_WS) + 1; /* skip whitespace after target */
}
if (!strcmp(target, "xml")) { /* <?xml ... ?> */
/* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
s = strstr(s, "standalone");
if (s && !strncmp(s + strspn(s + 10, EZXML_WS "='\"") + 10, "yes", 3))
root->standalone = 1;
return;
}
if (!root->pi[0])
*(root->pi = (char***)malloc(sizeof(char **))) = NULL; /*first pi */
while (root->pi[i] && strcmp(target, root->pi[i][0]))
i++; /* find target */
if (!root->pi[i]) { /* new target */
root->pi = (char***)realloc(root->pi, sizeof(char **) * (i + 2));
root->pi[i] = (char**)malloc(sizeof(char *) * 3);
root->pi[i][0] = target;
root->pi[i][1] = (char *) (root->pi[i + 1] = NULL); /* terminate pi list */
/* Ted Campbell, Aug 14, 2007. Changed to use 'my_strdup' */
root->pi[i][2] = my_strdup(""); /* empty document position list */
}
while (root->pi[i][j])
j++; /* find end of instruction list for this target */
root->pi[i] = (char**)realloc(root->pi[i], sizeof(char *) * (j + 3));
root->pi[i][j + 2] = (char*)realloc(root->pi[i][j + 1], j + 1);
strcpy(root->pi[i][j + 2] + j - 1, (root->xml.name) ? ">" : "<");
root->pi[i][j + 1] = NULL; /* null terminate pi list for this target */
root->pi[i][j] = s; /* set instruction */
}
/* called when the parser finds an internal doctype subset */
/* Jason Luu June 22, 2010, Added line number support */
static short ezxml_internal_dtd(ezxml_root_t root, char *s,
size_t len) {
char q, *c, *t, *n = NULL, *v, **ent, **pe;
char temp[] = {'\0','\0','\0'};
int i, j;
pe = (char**)memcpy(malloc(sizeof(EZXML_NIL)), EZXML_NIL, sizeof(EZXML_NIL));
for (s[len] = '\0'; s;) {
while (*s && *s != '<' && *s != '%')
s++; /* find next declaration */
if (!*s)
break;
else if (!strncmp(s, "<!ENTITY", 8)) { /* parse entity definitions */
c = s += strspn(s + 8, EZXML_WS) + 8; /* skip white space separator */
n = s + strspn(s, EZXML_WS "%"); /* find name */
*(s = n + strcspn(n, EZXML_WS)) = ';'; /* append ; to name */
v = s + strspn(s + 1, EZXML_WS) + 1; /* find value */
if ((q = *(v++)) != '"' && q != '\'') { /* skip externals */
s = strchr(s, '>');
continue;
}
for (i = 0, ent = (*c == '%') ? pe : root->ent; ent[i]; i++)
;
ent = (char**)realloc(ent, (i + 3) * sizeof(char *)); /* space for next ent */
if (*c == '%')
pe = ent;
else
root->ent = ent;
*(++s) = '\0'; /* null terminate name */
/* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
s = strchr(v, q);
if (s)
*(s++) = '\0'; /* null terminate value */
ent[i + 1] = ezxml_decode(v, pe, '%'); /* set value */
ent[i + 2] = NULL; /* null terminate entity list */
if (!ezxml_ent_ok(n, ent[i + 1], ent)) { /* circular reference */
if (ent[i + 1] != v)
free(ent[i + 1]);
ezxml_err(root, v, "circular entity declaration &%s", n);
break;
} else
ent[i] = n; /* set entity name */
} else if (!strncmp(s, "<!ATTLIST", 9)) { /* parse default attributes */
t = s + strspn(s + 9, EZXML_WS) + 9; /* skip whitespace separator */
if (!*t) {
ezxml_err(root, t, "unclosed <!ATTLIST");
break;
}
if (*(s = t + strcspn(t, EZXML_WS ">")) == '>')
continue;
else
*s = '\0'; /* null terminate tag name */
for (i = 0; root->attr[i] && strcmp(n, root->attr[i][0]); i++)
;
++s;
while (*(n = s + strspn(s, EZXML_WS)) && *n != '>') {
if (*(s = n + strcspn(n, EZXML_WS)))
*s = '\0'; /* attr name */
else {
ezxml_err(root, t, "malformed <!ATTLIST");
break;
}
s += strspn(s + 1, EZXML_WS) + 1; /* find next token */
if ((strncmp(s, "CDATA", 5))) {
temp[0] = '*';
} else {
temp[0]=' ';
}
c = temp; /* is it cdata? */
if (!strncmp(s, "NOTATION", 8))
s += strspn(s + 8, EZXML_WS) + 8;
s = (*s == '(') ? strchr(s, ')') : s + strcspn(s, EZXML_WS);
if (!s) {
ezxml_err(root, t, "malformed <!ATTLIST");
break;
}
s += strspn(s, EZXML_WS ")"); /* skip white space separator */
if (!strncmp(s, "#FIXED", 6))
s += strspn(s + 6, EZXML_WS) + 6;
if (*s == '#') { /* no default value */
s += strcspn(s, EZXML_WS ">") - 1;
if (*c == ' ')
continue; /* cdata is default, nothing to do */
v = NULL;
} else {
/* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
s = strchr(v = s + 1, *s);
if ((*s == '"' || *s == '\'') && /* default value */
s)
*s = '\0';
else {
ezxml_err(root, t, "malformed <!ATTLIST");
break;
}
}
if (!root->attr[i]) { /* new tag name */
root->attr =
(!i) ? (char***)malloc(2 * sizeof(char **)) : (char***)realloc(
root->attr,
(i + 2) * sizeof(char **));
root->attr[i] = (char**)malloc(2 * sizeof(char *));
root->attr[i][0] = t; /* set tag name */
root->attr[i][1] = (char *) (root->attr[i + 1] = NULL);
}
for (j = 1; root->attr[i][j]; j += 3)
; /* find end of list */
root->attr[i] = (char**)realloc(root->attr[i],
(j + 4) * sizeof(char *));
root->attr[i][j + 3] = NULL; /* null terminate list */
root->attr[i][j + 2] = c; /* is it cdata? */
root->attr[i][j + 1] =
(v) ? ezxml_decode(v, root->ent, *c) : NULL;
root->attr[i][j] = n; /* attribute name */
++s;
}
} else if (!strncmp(s, "<!--", 4)) {
s = strstr(s + 4, "-->"); /* comments */
}
else if (!strncmp(s, "<?", 2)) { /* processing instructions */
/* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
s = strstr(c = s + 2, "?>");
if (s)
ezxml_proc_inst(root, c, s++ - c);
} else if (*s == '<')
s = strchr(s, '>'); /* skip other declarations */
else if (*(s++) == '%' && !root->standalone)
break;
}
free(pe);
return !*root->err;
}
/* Converts a UTF-16 string to UTF-8. Returns a new string that must be freed */
/* or NULL if no conversion was needed. */
static char *
ezxml_str2utf8(char **s, size_t * len) {
char *u;
size_t l = 0, sl, max = *len;
long c, d;
int b, be = (**s == '\xFE') ? 1 : (**s == '\xFF') ? 0 : -1;
if (be == -1)
return NULL; /* not UTF-16 */
u = (char*)malloc(max);
for (sl = 2; sl < *len - 1; sl += 2) {
c = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF) /*UTF-16BE */
:
(((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF); /*UTF-16LE */
if (c >= 0xD800 && c <= 0xDFFF && (sl += 2) < *len - 1) { /* high-half */
d = (be) ?
(((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF) :
(((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF);
c = (((c & 0x3FF) << 10) | (d & 0x3FF)) + 0x10000;
}
while (l + 6 > max)
u = (char*)realloc(u, max += EZXML_BUFSIZE);
if (c < 0x80)
u[l++] = (char)c; /* US-ASCII subset */
else { /* multi-byte UTF-8 sequence */
for (b = 0, d = c; d; d /= 2)
b++; /* bits in c */
b = (b - 2) / 5; /* bytes in payload */
u[l++] = (char)((0xFF << (7 - b)) | (c >> (6 * b))); /* head */
while (b)
u[l++] = 0x80 | ((c >> (6 * --b)) & 0x3F); /* payload */
}
}
return *s = (char*)realloc(u, *len = l);
}
/* frees a tag attribute list */
static void ezxml_free_attr(char **attr) {
int i = 0;
char *m;
if (!attr || attr == EZXML_NIL)
return; /* nothing to free */
while (attr[i])
i += 2; /* find end of attribute list */
m = attr[i + 1]; /* list of which names and values are malloced */
for (i = 0; m[i]; i++) {
if (m[i] & EZXML_NAMEM)
free(attr[i * 2]);
if (m[i] & EZXML_TXTM)
free(attr[(i * 2) + 1]);
}
free(m);
free(attr);
}
/* parse the given xml string and return an ezxml structure */
/* Jason Luu June 22, 2010, Added line number support */
ezxml_t ezxml_parse_str(char *s, size_t len) {
ezxml_root_t root = (ezxml_root_t) ezxml_new(0);
char q, e, *d, *temp, **attr, **a = NULL; /* initialize a to avoid compile warning */
int l, i, j;
int line = 1;
root->m = s;
if (!len)
return ezxml_err(root, NULL, "root tag missing");
root->u = ezxml_str2utf8(&s, &len); /* convert utf-16 to utf-8 */
root->e = (root->s = s) + len; /* record start and end of work area */
e = s[len - 1]; /* save end char */
s[len - 1] = '\0'; /* turn end char into null terminator */
while (*s && *s != '<')
s++; /* find first tag */
if (!*s)
return ezxml_err(root, s, "root tag missing");
for (;;) {
attr = (char **) EZXML_NIL;
d = ++s;
if (isalpha(*s) || *s == '_' || *s == ':' || *s < '\0') { /* new tag */
if (!root->cur)
return ezxml_err(root, d, "markup outside of root element");
s += strcspn(s, EZXML_WS "/>");
while (isspace(*s)) {
if (*s == '\n')
line++;
*(s++) = '\0'; /* null terminate tag name */
}
if (*s && *s != '/' && *s != '>') { /* find tag in default attr list */
/* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
a = root->attr[0];
for (i = 0; a && strcmp(a[0], d); i++) {
a = root->attr[i];
}
}
for (l = 0; *s && *s != '/' && *s != '>'; l += 2) { /* new attrib */
attr = (l) ?
(char**)realloc(attr, (l + 4) * sizeof(char *)) :
(char**)malloc(4 * sizeof(char *)); /* allocate space */
attr[l + 3] =
(l) ? (char*)realloc(attr[l + 1], (l / 2) + 2) : (char*)malloc(2); /* mem for list of maloced vals */
strcpy(attr[l + 3] + (l / 2), " "); /* value is not malloced */
attr[l + 2] = NULL; /* null terminate list */
attr[l + 1] = ""; /* temporary attribute value */
attr[l] = s; /* set attribute name */
s += strcspn(s, EZXML_WS "=/>");
if (*s == '=' || isspace(*s)) {
if (*s == '\n')
line++;
*(s++) = '\0'; /* null terminate tag attribute name */
q = *(s += strspn(s, EZXML_WS "="));
if (q == '"' || q == '\'') { /* attribute value */
attr[l + 1] = ++s;
while (*s && *s != q)
s++;
if (*s)
*(s++) = '\0'; /* null terminate attribute val */
else {
ezxml_free_attr(attr);
return ezxml_err(root, d, "missing %c", q);
}
for (j = 1; a && a[j] && strcmp(a[j], attr[l]); j += 3)
;
attr[l + 1] = ezxml_decode(attr[l + 1],
root->ent, (a && a[j]) ? *a[j + 2] : ' ');
if (attr[l + 1] < d || attr[l + 1] > s)
attr[l + 3][l / 2] = EZXML_TXTM; /* value malloced */
}
}
while (isspace(*s)) {
if (*s == '\n')
line++;
s++;
}
}
if (*s == '/') { /* self closing tag */
*(s++) = '\0';
if ((*s && *s != '>') || (!*s && e != '>')) {
if (l)
ezxml_free_attr(attr);
return ezxml_err(root, d, "missing >");
}
ezxml_open_tag(root, line, d, attr);
ezxml_close_tag(root, d, s);
} else if ((q = *s) == '>' || (!*s && e == '>')) { /* open tag */
*s = '\0'; /* temporarily null terminate tag name */
ezxml_open_tag(root, line, d, attr);
*s = q;
} else {
if (l)
ezxml_free_attr(attr);
return ezxml_err(root, d, "missing >");
}
} else if (*s == '/') { /* close tag */
s += strcspn(d = s + 1, EZXML_WS ">") + 1;
/* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
q = *s;
if (!q && e != '>')
return ezxml_err(root, d, "missing >");
*s = '\0'; /* temporarily null terminate tag name */
if (ezxml_close_tag(root, d, s))
return &root->xml;
if (isspace(*s = q)) {
if (*s == '\n')
line++;
s += strspn(s, EZXML_WS);
}
} else if (!strncmp(s, "!--", 3)) { /* xml comment */
temp = s;
s = strstr(s + 3, "--");
if (!s || (*(s += 2) != '>' && *s) || (!*s && e != '>'))
return ezxml_err(root, d, "unclosed <!--");
while (temp != s && *temp != '\0') {
if (*temp == '\n') {
line++;
}
temp++;
}
} else if (!strncmp(s, "![CDATA[", 8)) { /* cdata */
/* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
s = strstr(s, "]]>");
if (s)
ezxml_char_content(root, d + 8, (s += 2) - d - 10, 'c');
else
return ezxml_err(root, d, "unclosed <![CDATA[");
} else if (!strncmp(s, "!DOCTYPE", 8)) { /* dtd */
for (l = 0;
*s
&& ((!l && *s != '>')
|| (l
&& (*s != ']'
|| *(s
+ strspn(s + 1,
EZXML_WS)
+ 1) != '>')));
l = (*s == '[') ? 1 : l)
s += strcspn(s + 1, "[]>") + 1;
if (!*s && e != '>')
return ezxml_err(root, d, "unclosed <!DOCTYPE");
d = (l) ? strchr(d, '[') + 1 : d;
if (l && !ezxml_internal_dtd(root, d, s++ - d))
return &root->xml;
} else if (*s == '?') { /* <?...?> processing instructions */
do {
s = strchr(s, '?');
} while (s && *(++s) && *s != '>');
if (!s || (!*s && e != '>'))
return ezxml_err(root, d, "unclosed <?");
else
ezxml_proc_inst(root, d + 1, s - d - 2);
} else
return ezxml_err(root, d, "unexpected <");
if (!s || !*s)
break;
*s = '\0';
d = ++s;
if (*s && *s != '<') { /* tag character content */
while (*s && *s != '<') {
if (*s == '\n') {
line++;
}
s++;
}
if (*s)
ezxml_char_content(root, d, s - d, '&');
else
break;
} else if (!*s)
break;
}
if (!root->cur)
return &root->xml;
else if (!root->cur->name)
return ezxml_err(root, d, "root tag missing");
else
return ezxml_err(root, d, "unclosed tag <%s>", root->cur->name);
}
/* Wrapper for ezxml_parse_str() that accepts a file stream. Reads the entire */
/* stream into memory and then parses it. For xml files, use ezxml_parse_file() */
/* or ezxml_parse_fd() */
ezxml_t ezxml_parse_fp(FILE * fp) {
ezxml_root_t root;
size_t l, len = 0;
char *s;
/* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
s = (char*)malloc(EZXML_BUFSIZE);
if (!s)
return NULL;
do {
len += (l = fread((s + len), 1, EZXML_BUFSIZE, fp));
if (l == EZXML_BUFSIZE)
s = (char*)realloc(s, len + EZXML_BUFSIZE);
} while (s && l == EZXML_BUFSIZE);
if (!s)
return NULL;
root = (ezxml_root_t) ezxml_parse_str(s, len);
/* Ted Campbell, Aug 14, 2007. Added explicit cast. */
root->len = (size_t) (-1); /* so we know to free s in ezxml_free() */
return &root->xml;
}
/* A wrapper for ezxml_parse_str() that accepts a file descriptor. First */
/* attempts to mem map the file. Failing that, reads the file into memory. */
/* Returns NULL on failure. */
ezxml_t ezxml_parse_fd(int fd) {
ezxml_root_t root;
struct stat st;
size_t l;
void *m;
if (fd < 0)
return NULL;
fstat(fd, &st);
#ifndef EZXML_NOMMAP
l = (st.st_size + sysconf(_SC_PAGESIZE) - 1) & ~(sysconf(_SC_PAGESIZE) - 1);
if ((m = mmap(NULL, l, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0))
!= MAP_FAILED) {
madvise(m, l, MADV_SEQUENTIAL); /* optimize for sequential access */
root = (ezxml_root_t) ezxml_parse_str((char*)m, st.st_size);
madvise(m, root->len = l, MADV_NORMAL); /* put it back to normal */
} else { /* mmap failed, read file into memory */
#endif /* EZXML_NOMMAP */
l = read(fd, m = malloc(st.st_size), st.st_size);
root = (ezxml_root_t) ezxml_parse_str((char*)m, l);
/* Ted Campbell, Aug 14, 2007. Added explicit cast. */
root->len = (size_t) (-1); /* so we know to free s in ezxml_free() */
#ifndef EZXML_NOMMAP
}
#endif /* EZXML_NOMMAP */
return &root->xml;
}
/* a wrapper for ezxml_parse_fd that accepts a file name */
ezxml_t ezxml_parse_file(const char *file) {
int fd = open(file, O_RDONLY, 0);
ezxml_t xml = ezxml_parse_fd(fd);
if (fd >= 0)
close(fd);
return xml;
}
/* Encodes ampersand sequences appending the results to *dst, reallocating *dst */
/* if length excedes max. a is non-zero for attribute encoding. Returns *dst */
static char *
ezxml_ampencode(const char *s, size_t len, char **dst, size_t * dlen,
size_t * max, short a) {
const char *e;
for (e = s + len; s != e; s++) {
while (*dlen + 10 > *max)
*dst = (char*)realloc(*dst, *max += EZXML_BUFSIZE);
switch (*s) {
case '\0':
return *dst;
case '&':
*dlen += sprintf(*dst + *dlen, "&amp;");
break;
case '<':
*dlen += sprintf(*dst + *dlen, "&lt;");
break;
case '>':
*dlen += sprintf(*dst + *dlen, "&gt;");
break;
case '"':
*dlen += sprintf(*dst + *dlen, (a) ? "&quot;" : "\"");
break;
case '\n':
*dlen += sprintf(*dst + *dlen, (a) ? "&#xA;" : "\n");
break;
case '\t':
*dlen += sprintf(*dst + *dlen, (a) ? "&#x9;" : "\t");
break;
case '\r':
*dlen += sprintf(*dst + *dlen, "&#xD;");
break;
default:
(*dst)[(*dlen)++] = *s;
}
}
return *dst;
}
/* Recursively converts each tag to xml appending it to *s. Reallocates *s if */
/* its length excedes max. start is the location of the previous tag in the */
/* parent tag's character content. Returns *s. */
static char *
ezxml_toxml_r(ezxml_t xml, char **s, size_t * len, size_t * max, size_t start,
char ***attr) {
int i, j;
const char *txt = (xml->parent) ? xml->parent->txt : "";
size_t off = 0;
/* parent character content up to this tag */
*s = ezxml_ampencode(txt + start, xml->off - start, s, len, max, 0);
while (*len + strlen(xml->name) + 4 > *max) /* reallocate s */
*s = (char*)realloc(*s, *max += EZXML_BUFSIZE);
*len += sprintf(*s + *len, "<%s", xml->name); /* open tag */
for (i = 0; xml->attr[i]; i += 2) { /* tag attributes */
if (ezxml_attr(xml, xml->attr[i]) != xml->attr[i + 1])
continue;
while (*len + strlen(xml->attr[i]) + 7 > *max) /* reallocate s */
*s = (char*)realloc(*s, *max += EZXML_BUFSIZE);
*len += sprintf(*s + *len, " %s=\"", xml->attr[i]);
/* Ted Campbell, Aug 14, 2007. Added explicit cast to size_t. */
ezxml_ampencode(xml->attr[i + 1], (size_t) (-1), s, len, max, 1);
*len += sprintf(*s + *len, "\"");
}
for (i = 0; attr[i] && strcmp(attr[i][0], xml->name); i++)
;
for (j = 1; attr[i] && attr[i][j]; j += 3) { /* default attributes */
if (!attr[i][j + 1] || ezxml_attr(xml, attr[i][j]) != attr[i][j + 1])
continue; /* skip duplicates and non-values */
while (*len + strlen(attr[i][j]) + 7 > *max) /* reallocate s */
*s = (char*)realloc(*s, *max += EZXML_BUFSIZE);
*len += sprintf(*s + *len, " %s=\"", attr[i][j]);
/* Ted Campbell, Aug 14, 2007. Added explicit cast to size_t. */
ezxml_ampencode(attr[i][j + 1], (size_t) (-1), s, len, max, 1);
*len += sprintf(*s + *len, "\"");
}
*len += sprintf(*s + *len, ">");
/* Ted Campbell, Aug 14, 2007. Added explicit cast to size_t. */
*s = (xml->child) ?
ezxml_toxml_r(xml->child, s, len, max, 0, attr) /*child */
:
ezxml_ampencode(xml->txt, (size_t) (-1), s, len, max, 0); /*data */
while (*len + strlen(xml->name) + 4 > *max) /* reallocate s */
*s = (char*)realloc(*s, *max += EZXML_BUFSIZE);
*len += sprintf(*s + *len, "</%s>", xml->name); /* close tag */
while (txt[off] && off < xml->off)
off++; /* make sure off is within bounds */
/* Ted Campbell, Aug 14, 2007. Added explicit cast to size_t. */
return (xml->ordered) ?
ezxml_toxml_r(xml->ordered, s, len, max, off, attr) :
ezxml_ampencode(txt + off, (size_t) (-1), s, len, max, 0);
}
/* Converts an ezxml structure back to xml. Returns a string of xml data that */
/* must be freed. */
char *
ezxml_toxml(ezxml_t xml) {
ezxml_t p = (xml) ? xml->parent : NULL, o = (xml) ? xml->ordered : NULL;
ezxml_root_t root = (ezxml_root_t) xml;
size_t len = 0, max = EZXML_BUFSIZE;
char *s = strcpy((char*)malloc(max), ""), *t, *n;
int i, j, k;
if (!xml || !xml->name)
return (char*)realloc(s, len + 1);
while (root->xml.parent)
root = (ezxml_root_t) root->xml.parent; /* root tag */
for (i = 0; !p && root->pi[i]; i++) { /* pre-root processing instructions */
for (k = 2; root->pi[i][k - 1]; k++)
;
for (j = 1; root->pi[i][j]; j++) {
/* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
n = root->pi[i][j];
if (root->pi[i][k][j - 1] == '>')
continue; /* not pre-root */
while (len + strlen(t = root->pi[i][0]) + strlen(n) + 7 > max)
s = (char*)realloc(s, max += EZXML_BUFSIZE);
len += sprintf(s + len, "<?%s%s%s?>\n", t, *n ? " " : "", n);
}
}
xml->parent = xml->ordered = NULL;
s = ezxml_toxml_r(xml, &s, &len, &max, 0, root->attr);
xml->parent = p;
xml->ordered = o;
for (i = 0; !p && root->pi[i]; i++) { /* post-root processing instructions */
for (k = 2; root->pi[i][k - 1]; k++)
;
for (j = 1; root->pi[i][j]; j++) {
/* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
n = root->pi[i][j];
if (root->pi[i][k][j - 1] == '<')
continue; /* not post-root */
while (len + strlen(t = root->pi[i][0]) + strlen(n) + 7 > max)
s = (char*)realloc(s, max += EZXML_BUFSIZE);
len += sprintf(s + len, "\n<?%s%s%s?>", t, *n ? " " : "", n);
}
}
return (char*)realloc(s, len + 1);
}
/* free the memory allocated for the ezxml structure */
void ezxml_free(ezxml_t xml) {
ezxml_root_t root = (ezxml_root_t) xml;
int i, j;
char **a, *s;
if (!xml)
return;
ezxml_free(xml->child);
ezxml_free(xml->ordered);
if (!xml->parent) { /* free root tag allocations */
for (i = 10; root->ent[i]; i += 2) /* 0 - 9 are default entites (<>&"') */
if ((s = root->ent[i + 1]) < root->s || s > root->e)
free(s);
free(root->ent); /* free list of general entities */
for (i = 0; root->attr[i]; i++) {
/* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
a = root->attr[i];
for (j = 1; a[j++]; j += 2) /* free malloced attribute values */
if (a[j] && (a[j] < root->s || a[j] > root->e))
free(a[j]);
free(a);
}
if (root->attr[0])
free(root->attr); /* free default attribute list */
for (i = 0; root->pi[i]; i++) {
for (j = 1; root->pi[i][j]; j++)
;
free(root->pi[i][j + 1]);
free(root->pi[i]);
}
if (root->pi[0])
free(root->pi); /* free processing instructions */
if (root->len == (size_t)-1)
free(root->m); /* malloced xml data */
#ifndef EZXML_NOMMAP
else if (root->len)
munmap(root->m, root->len); /* mem mapped xml data */
#endif /* EZXML_NOMMAP */
if (root->u)
free(root->u); /* utf8 conversion */
}
ezxml_free_attr(xml->attr); /* tag attributes */
if ((xml->flags & EZXML_TXTM))
free(xml->txt); /* character content */
if ((xml->flags & EZXML_NAMEM))
free(xml->name); /* tag name */
free(xml);
}
/* return parser error message or empty string if none */
const char *
ezxml_error(ezxml_t xml) {
while (xml && xml->parent)
xml = xml->parent; /* find root tag */
return (xml) ? ((ezxml_root_t) xml)->err : "";
}
/* returns a new empty ezxml structure with the given root tag name */
ezxml_t ezxml_new(char *name) {
static char *ent[] = { "lt;", "&#60;", "gt;", "&#62;", "quot;", "&#34;",
"apos;", "&#39;", "amp;", "&#38;", NULL };
ezxml_root_t root = (ezxml_root_t) memset(malloc(sizeof(struct ezxml_root)),
'\0', sizeof(struct ezxml_root));
root->xml.name = name;
root->cur = &root->xml;
strcpy(root->err, root->xml.txt = "");
root->ent = (char**)memcpy(malloc(sizeof(ent)), ent, sizeof(ent));
root->attr = root->pi = (char ***) (root->xml.attr = EZXML_NIL);
return &root->xml;
}
/* inserts an existing tag into an ezxml structure */
ezxml_t ezxml_insert(ezxml_t xml, ezxml_t dest, size_t off) {
ezxml_t cur, prev, head;
xml->next = xml->sibling = xml->ordered = NULL;
xml->off = off;
xml->parent = dest;
/* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
head = dest->child;
if (head) { /* already have sub tags */
if (head->off <= off) { /* not first subtag */
for (cur = head; cur->ordered && cur->ordered->off <= off;
cur = cur->ordered)
;
xml->ordered = cur->ordered;
cur->ordered = xml;
} else { /* first subtag */
xml->ordered = head;
dest->child = xml;
}
for (cur = head, prev = NULL; cur && strcmp(cur->name, xml->name);
prev = cur, cur = cur->sibling)
; /* find tag type */
if (cur && cur->off <= off) { /* not first of type */
while (cur->next && cur->next->off <= off)
cur = cur->next;
xml->next = cur->next;
cur->next = xml;
} else { /* first tag of this type */
if (prev && cur)
prev->sibling = cur->sibling; /* remove old first */
xml->next = cur; /* old first tag is now next */
for (cur = head, prev = NULL; cur && cur->off <= off;
prev = cur, cur = cur->sibling)
; /* new sibling insert point */
xml->sibling = cur;
if (prev)
prev->sibling = xml;
}
} else
dest->child = xml; /* only sub tag */
return xml;
}
/* Adds a child tag. off is the offset of the child tag relative to the start */
/* of the parent tag's character content. Returns the child tag. */
ezxml_t ezxml_add_child(ezxml_t xml, char *name, size_t off) {
ezxml_t child;
if (!xml)
return NULL;
child = (ezxml_t) memset(malloc(sizeof(struct ezxml)), '\0',
sizeof(struct ezxml));
child->name = name;
child->attr = EZXML_NIL;
child->txt = "";
return ezxml_insert(child, xml, off);
}
/* sets the character content for the given tag and returns the tag */
ezxml_t ezxml_set_txt(ezxml_t xml, char *txt) {
if (!xml)
return NULL;
if (xml->flags & EZXML_TXTM)
free(xml->txt); /* existing txt was malloced */
xml->flags &= ~EZXML_TXTM;
strcpy(xml->txt, txt);
xml->txt = txt;
return xml;
}
/* Sets the given tag attribute or adds a new attribute if not found. A value */
/* of NULL will remove the specified attribute. Returns the tag given. */
ezxml_t ezxml_set_attr(ezxml_t xml, char *name, char *value) {
int l = 0, c;
if (!xml)
return NULL;
while (xml->attr[l] && strcmp(xml->attr[l], name))
l += 2;
if (!xml->attr[l]) { /* not found, add as new attribute */
if (!value)
return xml; /* nothing to do */
if (xml->attr == EZXML_NIL) { /* first attribute */
xml->attr = (char**)malloc(4 * sizeof(char *));
/* Ted Campbell, Aug 14, 2007. Changed to use 'my_strdup' */
xml->attr[1] = my_strdup(""); /* empty list of malloced names/vals */
} else
xml->attr = (char**)realloc(xml->attr, (l + 4) * sizeof(char *));
xml->attr[l] = name; /*set attribute name */
xml->attr[l + 2] = NULL; /* null terminate attribute list */
xml->attr[l + 3] = (char*)realloc(xml->attr[l + 1],
(c = strlen(xml->attr[l + 1])) + 2);
strcpy(xml->attr[l + 3] + c, " "); /* set name/value as not malloced */
if (xml->flags & EZXML_DUP)
xml->attr[l + 3][c] = (char) (unsigned char) EZXML_NAMEM;
} else if (xml->flags & EZXML_DUP)
free(name); /* name was strduped */
for (c = l; xml->attr[c]; c += 2)
; /* find end of attribute list */
if (xml->attr[c + 1][l / 2] & EZXML_TXTM)
free(xml->attr[l + 1]); /*old val */
if (xml->flags & EZXML_DUP)
xml->attr[c + 1][l / 2] |= EZXML_TXTM;
else
xml->attr[c + 1][l / 2] &= ~EZXML_TXTM;
if (value)
xml->attr[l + 1] = value; /* set attribute value */
else { /* remove attribute */
if (xml->attr[c + 1][l / 2] & EZXML_NAMEM)
free(xml->attr[l]);
/* Ted Campbell, Aug 14, 2007. It seems that the size should be
* (c + 2) - (l + 2) = (c - l) */
memmove(xml->attr + l, xml->attr + l + 2, (c - l) * sizeof(char *));
/* Ted Campbell, Aug 14, 2007. We need to adjust c to point to new
* location it was moved to since its old location is undefined */
c -= 2; /* We have one less elements */
xml->attr = (char**)realloc(xml->attr, (c + 2) * sizeof(char *));
memmove(xml->attr[c + 1] + (l / 2), xml->attr[c + 1] + (l / 2) + 1,
(c / 2) - (l / 2)); /* fix list of which name/vals are malloced */
}
xml->flags &= ~EZXML_DUP; /* clear strdup() flag */
return xml;
}
/* sets a flag for the given tag and returns the tag */
ezxml_t ezxml_set_flag(ezxml_t xml, short flag) {
if (xml)
xml->flags |= flag;
return xml;
}
/* removes a tag along with its subtags without freeing its memory */
ezxml_t ezxml_cut(ezxml_t xml) {
ezxml_t cur;
if (!xml)
return NULL; /* nothing to do */
if (xml->next)
xml->next->sibling = xml->sibling; /* patch sibling list */
if (xml->parent) { /* not root tag */
cur = xml->parent->child; /* find head of subtag list */
if (cur == xml)
xml->parent->child = xml->ordered; /* first subtag */
else { /* not first subtag */
while (cur->ordered != xml)
cur = cur->ordered;
cur->ordered = cur->ordered->ordered; /* patch ordered list */
cur = xml->parent->child; /* go back to head of subtag list */
if (strcmp(cur->name, xml->name)) { /* not in first sibling list */
while (strcmp(cur->sibling->name, xml->name))
cur = cur->sibling;
if (cur->sibling == xml) { /* first of a sibling list */
cur->sibling =
(xml->next) ? xml->next : cur->sibling->sibling;
} else
cur = cur->sibling; /* not first of a sibling list */
}
while (cur->next && cur->next != xml)
cur = cur->next;
if (cur->next)
cur->next = cur->next->next; /* patch next list */
}
}
xml->ordered = xml->sibling = xml->next = NULL;
return xml;
}
#ifdef EZXML_TEST /* test harness */
int
main(int argc,
char **argv)
{
ezxml_t xml;
char *s;
int i;
if (argc != 2)
return vpr_printf(TIO_MESSAGE_ERROR, "usage: %s xmlfile\n", argv[0]);
xml = ezxml_parse_file(argv[1]);
vpr_printf("%s\n", (s = ezxml_toxml(xml)));
free(s);
i = vpr_printf(TIO_MESSAGE_ERROR, "%s", ezxml_error(xml));
ezxml_free(xml);
return (i) ? 1 : 0;
}
#endif /* EZXML_TEST */
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