begin refactor with bison xml parser

1 files changed, 0 insertions, 1015 deletions

diff --git a/3rdparty/ezxml/ezxml.c b/3rdparty/ezxml/ezxml.c
deleted file mode 100644
index 82b11fb..0000000
--- a/3rdparty/ezxml/ezxml.c
+++ /dev/null
@@ -1,1015 +0,0 @@
-/* ezxml.c
- *
- * Copyright 2004-2006 Aaron Voisine <aaron@voisine.org>
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
- * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <stdarg.h>
-#include <string.h>
-#include <ctype.h>
-#include <unistd.h>
-#include <sys/types.h>
-#ifndef EZXML_NOMMAP
-#include <sys/mman.h>
-#endif // EZXML_NOMMAP
-#include <sys/stat.h>
-#include "ezxml.h"
-
-#define EZXML_WS   "\t\r\n "  // whitespace
-#define EZXML_ERRL 128        // maximum error string length
-
-typedef struct ezxml_root *ezxml_root_t;
-struct ezxml_root {       // additional data for the root tag
-    struct ezxml xml;     // is a super-struct built on top of ezxml struct
-    ezxml_t cur;          // current xml tree insertion point
-    char *m;              // original xml string
-    size_t len;           // length of allocated memory for mmap, -1 for malloc
-    char *u;              // UTF-8 conversion of string if original was UTF-16
-    char *s;              // start of work area
-    char *e;              // end of work area
-    char **ent;           // general entities (ampersand sequences)
-    char ***attr;         // default attributes
-    char ***pi;           // processing instructions
-    short standalone;     // non-zero if <?xml standalone="yes"?>
-    char err[EZXML_ERRL]; // error string
-};
-
-char *EZXML_NIL[] = { NULL }; // empty, null terminated array of strings
-
-// returns the first child tag with the given name or NULL if not found
-ezxml_t ezxml_child(ezxml_t xml, const char *name)
-{
-    xml = (xml) ? xml->child : NULL;
-    while (xml && strcmp(name, xml->name)) xml = xml->sibling;
-    return xml;
-}
-
-// returns the Nth tag with the same name in the same subsection or NULL if not
-// found
-ezxml_t ezxml_idx(ezxml_t xml, int idx)
-{
-    for (; xml && idx; idx--) xml = xml->next;
-    return xml;
-}
-
-// returns the value of the requested tag attribute or NULL if not found
-const char *ezxml_attr(ezxml_t xml, const char *attr)
-{
-    int i = 0, j = 1;
-    ezxml_root_t root = (ezxml_root_t)xml;
-
-    if (! xml || ! xml->attr) return NULL;
-    while (xml->attr[i] && strcmp(attr, xml->attr[i])) i += 2;
-    if (xml->attr[i]) return xml->attr[i + 1]; // found attribute
-
-    while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; // root tag
-    for (i = 0; root->attr[i] && strcmp(xml->name, root->attr[i][0]); i++);
-    if (! root->attr[i]) return NULL; // no matching default attributes
-    while (root->attr[i][j] && strcmp(attr, root->attr[i][j])) j += 3;
-    return (root->attr[i][j]) ? root->attr[i][j + 1] : NULL; // found default
-}
-
-// same as ezxml_get but takes an already initialized va_list
-ezxml_t ezxml_vget(ezxml_t xml, va_list ap)
-{
-    char *name = va_arg(ap, char *);
-    int idx = -1;
-
-    if (name && *name) {
-        idx = va_arg(ap, int);    
-        xml = ezxml_child(xml, name);
-    }
-    return (idx < 0) ? xml : ezxml_vget(ezxml_idx(xml, idx), ap);
-}
-
-// Traverses the xml tree to retrieve a specific subtag. Takes a variable
-// length list of tag names and indexes. The argument list must be terminated
-// by either an index of -1 or an empty string tag name. Example: 
-// title = ezxml_get(library, "shelf", 0, "book", 2, "title", -1);
-// This retrieves the title of the 3rd book on the 1st shelf of library.
-// Returns NULL if not found.
-ezxml_t ezxml_get(ezxml_t xml, ...)
-{
-    va_list ap;
-    ezxml_t r;
-
-    va_start(ap, xml);
-    r = ezxml_vget(xml, ap);
-    va_end(ap);
-    return r;
-}
-
-// returns a null terminated array of processing instructions for the given
-// target
-const char **ezxml_pi(ezxml_t xml, const char *target)
-{
-    ezxml_root_t root = (ezxml_root_t)xml;
-    int i = 0;
-
-    if (! root) return (const char **)EZXML_NIL;
-    while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; // root tag
-    while (root->pi[i] && strcmp(target, root->pi[i][0])) i++; // find target
-    return (const char **)((root->pi[i]) ? root->pi[i] + 1 : EZXML_NIL);
-}
-
-// set an error string and return root
-ezxml_t ezxml_err(ezxml_root_t root, char *s, const char *err, ...)
-{
-    va_list ap;
-    int line = 1;
-    char *t, fmt[EZXML_ERRL];
-    
-    for (t = root->s; t < s; t++) if (*t == '\n') line++;
-    snprintf(fmt, EZXML_ERRL, "[error near line %d]: %s", line, err);
-
-    va_start(ap, err);
-    vsnprintf(root->err, EZXML_ERRL, fmt, ap);
-    va_end(ap);
-
-    return &root->xml;
-}
-
-// Recursively decodes entity and character references and normalizes new lines
-// ent is a null terminated array of alternating entity names and values. set t
-// to '&' for general entity decoding, '%' for parameter entity decoding, 'c'
-// for cdata sections, ' ' for attribute normalization, or '*' for non-cdata
-// attribute normalization. Returns s, or if the decoded string is longer than
-// s, returns a malloced string that must be freed.
-char *ezxml_decode(char *s, char **ent, char t)
-{
-    char *e, *r = s, *m = s;
-    long b, c, d, l;
-
-    for (; *s; s++) { // normalize line endings
-        while (*s == '\r') {
-            *(s++) = '\n';
-            if (*s == '\n') memmove(s, (s + 1), strlen(s));
-        }
-    }
-    
-    for (s = r; ; ) {
-        while (*s && *s != '&' && (*s != '%' || t != '%') && !isspace(*s)) s++;
-
-        if (! *s) break;
-        else if (t != 'c' && ! strncmp(s, "&#", 2)) { // character reference
-            if (s[2] == 'x') c = strtol(s + 3, &e, 16); // base 16
-            else c = strtol(s + 2, &e, 10); // base 10
-            if (! c || *e != ';') { s++; continue; } // not a character ref
-
-            if (c < 0x80) *(s++) = c; // US-ASCII subset
-            else { // multi-byte UTF-8 sequence
-                for (b = 0, d = c; d; d /= 2) b++; // number of bits in c
-                b = (b - 2) / 5; // number of bytes in payload
-                *(s++) = (0xFF << (7 - b)) | (c >> (6 * b)); // head
-                while (b) *(s++) = 0x80 | ((c >> (6 * --b)) & 0x3F); // payload
-            }
-
-            memmove(s, strchr(s, ';') + 1, strlen(strchr(s, ';')));
-        }
-        else if ((*s == '&' && (t == '&' || t == ' ' || t == '*')) ||
-                 (*s == '%' && t == '%')) { // entity reference
-            for (b = 0; ent[b] && strncmp(s + 1, ent[b], strlen(ent[b]));
-                 b += 2); // find entity in entity list
-
-            if (ent[b++]) { // found a match
-                if ((c = strlen(ent[b])) - 1 > (e = strchr(s, ';')) - s) {
-                    l = (d = (s - r)) + c + strlen(e); // new length
-                    r = (r == m) ? strcpy(malloc(l), r) : realloc(r, l);
-                    e = strchr((s = r + d), ';'); // fix up pointers
-                }
-
-                memmove(s + c, e + 1, strlen(e)); // shift rest of string
-                strncpy(s, ent[b], c); // copy in replacement text
-            }
-            else s++; // not a known entity
-        }
-        else if ((t == ' ' || t == '*') && isspace(*s)) *(s++) = ' ';
-        else s++; // no decoding needed
-    }
-
-    if (t == '*') { // normalize spaces for non-cdata attributes
-        for (s = r; *s; s++) {
-            if ((l = strspn(s, " "))) memmove(s, s + l, strlen(s + l) + 1);
-            while (*s && *s != ' ') s++;
-        }
-        if (--s >= r && *s == ' ') *s = '\0'; // trim any trailing space
-    }
-    return r;
-}
-
-// called when parser finds start of new tag
-void ezxml_open_tag(ezxml_root_t root, char *name, char **attr)
-{
-    ezxml_t xml = root->cur;
-    
-    if (xml->name) xml = ezxml_add_child(xml, name, strlen(xml->txt));
-    else xml->name = name; // first open tag
-
-    xml->attr = attr;
-    root->cur = xml; // update tag insertion point
-}
-
-// called when parser finds character content between open and closing tag
-void ezxml_char_content(ezxml_root_t root, char *s, size_t len, char t)
-{
-    ezxml_t xml = root->cur;
-    char *m = s;
-    size_t l;
-
-    if (! xml || ! xml->name || ! len) return; // sanity check
-
-    s[len] = '\0'; // null terminate text (calling functions anticipate this)
-    len = strlen(s = ezxml_decode(s, root->ent, t)) + 1;
-
-    if (! *(xml->txt)) xml->txt = s; // initial character content
-    else { // allocate our own memory and make a copy
-        xml->txt = (xml->flags & EZXML_TXTM) // allocate some space
-                   ? realloc(xml->txt, (l = strlen(xml->txt)) + len)
-                   : strcpy(malloc((l = strlen(xml->txt)) + len), xml->txt);
-        strcpy(xml->txt + l, s); // add new char content
-        if (s != m) free(s); // free s if it was malloced by ezxml_decode()
-    }
-
-    if (xml->txt != m) ezxml_set_flag(xml, EZXML_TXTM);
-}
-
-// called when parser finds closing tag
-ezxml_t ezxml_close_tag(ezxml_root_t root, char *name, char *s)
-{
-    if (! root->cur || ! root->cur->name || strcmp(name, root->cur->name))
-        return ezxml_err(root, s, "unexpected closing tag </%s>", name);
-
-    root->cur = root->cur->parent;
-    return NULL;
-}
-
-// checks for circular entity references, returns non-zero if no circular
-// references are found, zero otherwise
-int ezxml_ent_ok(char *name, char *s, char **ent)
-{
-    int i;
-
-    for (; ; s++) {
-        while (*s && *s != '&') s++; // find next entity reference
-        if (! *s) return 1;
-        if (! strncmp(s + 1, name, strlen(name))) return 0; // circular ref.
-        for (i = 0; ent[i] && strncmp(ent[i], s + 1, strlen(ent[i])); i += 2);
-        if (ent[i] && ! ezxml_ent_ok(name, ent[i + 1], ent)) return 0;
-    }
-}
-
-// called when the parser finds a processing instruction
-void ezxml_proc_inst(ezxml_root_t root, char *s, size_t len)
-{
-    int i = 0, j = 1;
-    char *target = s;
-
-    s[len] = '\0'; // null terminate instruction
-    if (*(s += strcspn(s, EZXML_WS))) {
-        *s = '\0'; // null terminate target
-        s += strspn(s + 1, EZXML_WS) + 1; // skip whitespace after target
-    }
-
-    if (! strcmp(target, "xml")) { // <?xml ... ?>
-        if ((s = strstr(s, "standalone")) && ! strncmp(s + strspn(s + 10,
-            EZXML_WS "='\"") + 10, "yes", 3)) root->standalone = 1;
-        return;
-    }
-
-    if (! root->pi[0]) *(root->pi = malloc(sizeof(char **))) = NULL; //first pi
-
-    while (root->pi[i] && strcmp(target, root->pi[i][0])) i++; // find target
-    if (! root->pi[i]) { // new target
-        root->pi = realloc(root->pi, sizeof(char **) * (i + 2));
-        root->pi[i] = malloc(sizeof(char *) * 3);
-        root->pi[i][0] = target;
-        root->pi[i][1] = (char *)(root->pi[i + 1] = NULL); // terminate pi list
-        root->pi[i][2] = strdup(""); // empty document position list
-    }
-
-    while (root->pi[i][j]) j++; // find end of instruction list for this target
-    root->pi[i] = realloc(root->pi[i], sizeof(char *) * (j + 3));
-    root->pi[i][j + 2] = realloc(root->pi[i][j + 1], j + 1);
-    strcpy(root->pi[i][j + 2] + j - 1, (root->xml.name) ? ">" : "<");
-    root->pi[i][j + 1] = NULL; // null terminate pi list for this target
-    root->pi[i][j] = s; // set instruction
-}
-
-// called when the parser finds an internal doctype subset
-short ezxml_internal_dtd(ezxml_root_t root, char *s, size_t len)
-{
-    char q, *c, *t, *n = NULL, *v, **ent, **pe;
-    int i, j;
-    
-    pe = memcpy(malloc(sizeof(EZXML_NIL)), EZXML_NIL, sizeof(EZXML_NIL));
-
-    for (s[len] = '\0'; s; ) {
-        while (*s && *s != '<' && *s != '%') s++; // find next declaration
-
-        if (! *s) break;
-        else if (! strncmp(s, "<!ENTITY", 8)) { // parse entity definitions
-            c = s += strspn(s + 8, EZXML_WS) + 8; // skip white space separator
-            n = s + strspn(s, EZXML_WS "%"); // find name
-            *(s = n + strcspn(n, EZXML_WS)) = ';'; // append ; to name
-
-            v = s + strspn(s + 1, EZXML_WS) + 1; // find value
-            if ((q = *(v++)) != '"' && q != '\'') { // skip externals
-                s = strchr(s, '>');
-                continue;
-            }
-
-            for (i = 0, ent = (*c == '%') ? pe : root->ent; ent[i]; i++);
-            ent = realloc(ent, (i + 3) * sizeof(char *)); // space for next ent
-            if (*c == '%') pe = ent;
-            else root->ent = ent;
-
-            *(++s) = '\0'; // null terminate name
-            if ((s = strchr(v, q))) *(s++) = '\0'; // null terminate value
-            ent[i + 1] = ezxml_decode(v, pe, '%'); // set value
-            ent[i + 2] = NULL; // null terminate entity list
-            if (! ezxml_ent_ok(n, ent[i + 1], ent)) { // circular reference
-                if (ent[i + 1] != v) free(ent[i + 1]);
-                ezxml_err(root, v, "circular entity declaration &%s", n);
-                break;
-            }
-            else ent[i] = n; // set entity name
-        }
-        else if (! strncmp(s, "<!ATTLIST", 9)) { // parse default attributes
-            t = s + strspn(s + 9, EZXML_WS) + 9; // skip whitespace separator
-            if (! *t) { ezxml_err(root, t, "unclosed <!ATTLIST"); break; }
-            if (*(s = t + strcspn(t, EZXML_WS ">")) == '>') continue;
-            else *s = '\0'; // null terminate tag name
-            for (i = 0; root->attr[i] && strcmp(n, root->attr[i][0]); i++);
-
-            while (*(n = ++s + strspn(s, EZXML_WS)) && *n != '>') {
-                if (*(s = n + strcspn(n, EZXML_WS))) *s = '\0'; // attr name
-                else { ezxml_err(root, t, "malformed <!ATTLIST"); break; }
-
-                s += strspn(s + 1, EZXML_WS) + 1; // find next token
-                c = (strncmp(s, "CDATA", 5)) ? "*" : " "; // is it cdata?
-                if (! strncmp(s, "NOTATION", 8))
-                    s += strspn(s + 8, EZXML_WS) + 8;
-                s = (*s == '(') ? strchr(s, ')') : s + strcspn(s, EZXML_WS);
-                if (! s) { ezxml_err(root, t, "malformed <!ATTLIST"); break; }
-
-                s += strspn(s, EZXML_WS ")"); // skip white space separator
-                if (! strncmp(s, "#FIXED", 6))
-                    s += strspn(s + 6, EZXML_WS) + 6;
-                if (*s == '#') { // no default value
-                    s += strcspn(s, EZXML_WS ">") - 1;
-                    if (*c == ' ') continue; // cdata is default, nothing to do
-                    v = NULL;
-                }
-                else if ((*s == '"' || *s == '\'')  &&  // default value
-                         (s = strchr(v = s + 1, *s))) *s = '\0';
-                else { ezxml_err(root, t, "malformed <!ATTLIST"); break; }
-
-                if (! root->attr[i]) { // new tag name
-                    root->attr = (! i) ? malloc(2 * sizeof(char **))
-                                       : realloc(root->attr,
-                                                 (i + 2) * sizeof(char **));
-                    root->attr[i] = malloc(2 * sizeof(char *));
-                    root->attr[i][0] = t; // set tag name
-                    root->attr[i][1] = (char *)(root->attr[i + 1] = NULL);
-                }
-
-                for (j = 1; root->attr[i][j]; j += 3); // find end of list
-                root->attr[i] = realloc(root->attr[i],
-                                        (j + 4) * sizeof(char *));
-
-                root->attr[i][j + 3] = NULL; // null terminate list
-                root->attr[i][j + 2] = c; // is it cdata?
-                root->attr[i][j + 1] = (v) ? ezxml_decode(v, root->ent, *c)
-                                           : NULL;
-                root->attr[i][j] = n; // attribute name 
-            }
-        }
-        else if (! strncmp(s, "<!--", 4)) s = strstr(s + 4, "-->"); // comments
-        else if (! strncmp(s, "<?", 2)) { // processing instructions
-            if ((s = strstr(c = s + 2, "?>")))
-                ezxml_proc_inst(root, c, s++ - c);
-        }
-        else if (*s == '<') s = strchr(s, '>'); // skip other declarations
-        else if (*(s++) == '%' && ! root->standalone) break;
-    }
-
-    free(pe);
-    return ! *root->err;
-}
-
-// Converts a UTF-16 string to UTF-8. Returns a new string that must be freed
-// or NULL if no conversion was needed.
-char *ezxml_str2utf8(char **s, size_t *len)
-{
-    char *u;
-    size_t l = 0, sl, max = *len;
-    long c, d;
-    int b, be = (**s == '\xFE') ? 1 : (**s == '\xFF') ? 0 : -1;
-
-    if (be == -1) return NULL; // not UTF-16
-
-    u = malloc(max);
-    for (sl = 2; sl < *len - 1; sl += 2) {
-        c = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF)  //UTF-16BE
-                 : (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF); //UTF-16LE
-        if (c >= 0xD800 && c <= 0xDFFF && (sl += 2) < *len - 1) { // high-half
-            d = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF)
-                     : (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF);
-            c = (((c & 0x3FF) << 10) | (d & 0x3FF)) + 0x10000;
-        }
-
-        while (l + 6 > max) u = realloc(u, max += EZXML_BUFSIZE);
-        if (c < 0x80) u[l++] = c; // US-ASCII subset
-        else { // multi-byte UTF-8 sequence
-            for (b = 0, d = c; d; d /= 2) b++; // bits in c
-            b = (b - 2) / 5; // bytes in payload
-            u[l++] = (0xFF << (7 - b)) | (c >> (6 * b)); // head
-            while (b) u[l++] = 0x80 | ((c >> (6 * --b)) & 0x3F); // payload
-        }
-    }
-    return *s = realloc(u, *len = l);
-}
-
-// frees a tag attribute list
-void ezxml_free_attr(char **attr) {
-    int i = 0;
-    char *m;
-    
-    if (! attr || attr == EZXML_NIL) return; // nothing to free
-    while (attr[i]) i += 2; // find end of attribute list
-    m = attr[i + 1]; // list of which names and values are malloced
-    for (i = 0; m[i]; i++) {
-        if (m[i] & EZXML_NAMEM) free(attr[i * 2]);
-        if (m[i] & EZXML_TXTM) free(attr[(i * 2) + 1]);
-    }
-    free(m);
-    free(attr);
-}
-
-// parse the given xml string and return an ezxml structure
-ezxml_t ezxml_parse_str(char *s, size_t len)
-{
-    ezxml_root_t root = (ezxml_root_t)ezxml_new(NULL);
-    char q, e, *d, **attr, **a = NULL; // initialize a to avoid compile warning
-    int l, i, j;
-
-    root->m = s;
-    if (! len) return ezxml_err(root, NULL, "root tag missing");
-    root->u = ezxml_str2utf8(&s, &len); // convert utf-16 to utf-8
-    root->e = (root->s = s) + len; // record start and end of work area
-    
-    e = s[len - 1]; // save end char
-    s[len - 1] = '\0'; // turn end char into null terminator
-
-    while (*s && *s != '<') s++; // find first tag
-    if (! *s) return ezxml_err(root, s, "root tag missing");
-
-    for (; ; ) {
-        attr = (char **)EZXML_NIL;
-        d = ++s;
-        
-        if (isalpha(*s) || *s == '_' || *s == ':' || *s < '\0') { // new tag
-            if (! root->cur)
-                return ezxml_err(root, d, "markup outside of root element");
-
-            s += strcspn(s, EZXML_WS "/>");
-            while (isspace(*s)) *(s++) = '\0'; // null terminate tag name
-  
-            if (*s && *s != '/' && *s != '>') // find tag in default attr list
-                for (i = 0; (a = root->attr[i]) && strcmp(a[0], d); i++);
-
-            for (l = 0; *s && *s != '/' && *s != '>'; l += 2) { // new attrib
-                attr = (l) ? realloc(attr, (l + 4) * sizeof(char *))
-                           : malloc(4 * sizeof(char *)); // allocate space
-                attr[l + 3] = (l) ? realloc(attr[l + 1], (l / 2) + 2)
-                                  : malloc(2); // mem for list of maloced vals
-                strcpy(attr[l + 3] + (l / 2), " "); // value is not malloced
-                attr[l + 2] = NULL; // null terminate list
-                attr[l + 1] = ""; // temporary attribute value
-                attr[l] = s; // set attribute name
-
-                s += strcspn(s, EZXML_WS "=/>");
-                if (*s == '=' || isspace(*s)) { 
-                    *(s++) = '\0'; // null terminate tag attribute name
-                    q = *(s += strspn(s, EZXML_WS "="));
-                    if (q == '"' || q == '\'') { // attribute value
-                        attr[l + 1] = ++s;
-                        while (*s && *s != q) s++;
-                        if (*s) *(s++) = '\0'; // null terminate attribute val
-                        else {
-                            ezxml_free_attr(attr);
-                            return ezxml_err(root, d, "missing %c", q);
-                        }
-
-                        for (j = 1; a && a[j] && strcmp(a[j], attr[l]); j +=3);
-                        attr[l + 1] = ezxml_decode(attr[l + 1], root->ent, (a
-                                                   && a[j]) ? *a[j + 2] : ' ');
-                        if (attr[l + 1] < d || attr[l + 1] > s)
-                            attr[l + 3][l / 2] = EZXML_TXTM; // value malloced
-                    }
-                }
-                while (isspace(*s)) s++;
-            }
-
-            if (*s == '/') { // self closing tag
-                *(s++) = '\0';
-                if ((*s && *s != '>') || (! *s && e != '>')) {
-                    if (l) ezxml_free_attr(attr);
-                    return ezxml_err(root, d, "missing >");
-                }
-                ezxml_open_tag(root, d, attr);
-                ezxml_close_tag(root, d, s);
-            }
-            else if ((q = *s) == '>' || (! *s && e == '>')) { // open tag
-                *s = '\0'; // temporarily null terminate tag name
-                ezxml_open_tag(root, d, attr);
-                *s = q;
-            }
-            else {
-                if (l) ezxml_free_attr(attr);
-                return ezxml_err(root, d, "missing >"); 
-            }
-        }
-        else if (*s == '/') { // close tag
-            s += strcspn(d = s + 1, EZXML_WS ">") + 1;
-            if (! (q = *s) && e != '>') return ezxml_err(root, d, "missing >");
-            *s = '\0'; // temporarily null terminate tag name
-            if (ezxml_close_tag(root, d, s)) return &root->xml;
-            if (isspace(*s = q)) s += strspn(s, EZXML_WS);
-        }
-        else if (! strncmp(s, "!--", 3)) { // xml comment
-            if (! (s = strstr(s + 3, "--")) || (*(s += 2) != '>' && *s) ||
-                (! *s && e != '>')) return ezxml_err(root, d, "unclosed <!--");
-        }
-        else if (! strncmp(s, "![CDATA[", 8)) { // cdata
-            if ((s = strstr(s, "]]>")))
-                ezxml_char_content(root, d + 8, (s += 2) - d - 10, 'c');
-            else return ezxml_err(root, d, "unclosed <![CDATA[");
-        }
-        else if (! strncmp(s, "!DOCTYPE", 8)) { // dtd
-            for (l = 0; *s && ((! l && *s != '>') || (l && (*s != ']' || 
-                 *(s + strspn(s + 1, EZXML_WS) + 1) != '>')));
-                 l = (*s == '[') ? 1 : l) s += strcspn(s + 1, "[]>") + 1;
-            if (! *s && e != '>')
-                return ezxml_err(root, d, "unclosed <!DOCTYPE");
-            d = (l) ? strchr(d, '[') + 1 : d;
-            if (l && ! ezxml_internal_dtd(root, d, s++ - d)) return &root->xml;
-        }
-        else if (*s == '?') { // <?...?> processing instructions
-            do { s = strchr(s, '?'); } while (s && *(++s) && *s != '>');
-            if (! s || (! *s && e != '>')) 
-                return ezxml_err(root, d, "unclosed <?");
-            else ezxml_proc_inst(root, d + 1, s - d - 2);
-        }
-        else return ezxml_err(root, d, "unexpected <");
-        
-        if (! s || ! *s) break;
-        *s = '\0';
-        d = ++s;
-        if (*s && *s != '<') { // tag character content
-            while (*s && *s != '<') s++;
-            if (*s) ezxml_char_content(root, d, s - d, '&');
-            else break;
-        }
-        else if (! *s) break;
-    }
-
-    if (! root->cur) return &root->xml;
-    else if (! root->cur->name) return ezxml_err(root, d, "root tag missing");
-    else return ezxml_err(root, d, "unclosed tag <%s>", root->cur->name);
-}
-
-// Wrapper for ezxml_parse_str() that accepts a file stream. Reads the entire
-// stream into memory and then parses it. For xml files, use ezxml_parse_file()
-// or ezxml_parse_fd()
-ezxml_t ezxml_parse_fp(FILE *fp)
-{
-    ezxml_root_t root;
-    size_t l, len = 0;
-    char *s;
-
-    if (! (s = malloc(EZXML_BUFSIZE))) return NULL;
-    do {
-        len += (l = fread((s + len), 1, EZXML_BUFSIZE, fp));
-        if (l == EZXML_BUFSIZE) s = realloc(s, len + EZXML_BUFSIZE);
-    } while (s && l == EZXML_BUFSIZE);
-
-    if (! s) return NULL;
-    root = (ezxml_root_t)ezxml_parse_str(s, len);
-    root->len = -1; // so we know to free s in ezxml_free()
-    return &root->xml;
-}
-
-// A wrapper for ezxml_parse_str() that accepts a file descriptor. First
-// attempts to mem map the file. Failing that, reads the file into memory.
-// Returns NULL on failure.
-ezxml_t ezxml_parse_fd(int fd)
-{
-    ezxml_root_t root;
-    struct stat st;
-    size_t l;
-    void *m;
-
-    if (fd < 0) return NULL;
-    fstat(fd, &st);
-
-#ifndef EZXML_NOMMAP
-    l = (st.st_size + sysconf(_SC_PAGESIZE) - 1) & ~(sysconf(_SC_PAGESIZE) -1);
-    if ((m = mmap(NULL, l, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0)) !=
-        MAP_FAILED) {
-        madvise(m, l, MADV_SEQUENTIAL); // optimize for sequential access
-        root = (ezxml_root_t)ezxml_parse_str(m, st.st_size);
-        madvise(m, root->len = l, MADV_NORMAL); // put it back to normal
-    }
-    else { // mmap failed, read file into memory
-#endif // EZXML_NOMMAP
-        l = read(fd, m = malloc(st.st_size), st.st_size);
-        root = (ezxml_root_t)ezxml_parse_str(m, l);
-        root->len = -1; // so we know to free s in ezxml_free()
-#ifndef EZXML_NOMMAP
-    }
-#endif // EZXML_NOMMAP
-    return &root->xml;
-}
-
-// a wrapper for ezxml_parse_fd that accepts a file name
-ezxml_t ezxml_parse_file(const char *file)
-{
-    int fd = open(file, O_RDONLY, 0);
-    ezxml_t xml = ezxml_parse_fd(fd);
-    
-    if (fd >= 0) close(fd);
-    return xml;
-}
-
-// Encodes ampersand sequences appending the results to *dst, reallocating *dst
-// if length excedes max. a is non-zero for attribute encoding. Returns *dst
-char *ezxml_ampencode(const char *s, size_t len, char **dst, size_t *dlen,
-                      size_t *max, short a)
-{
-    const char *e;
-    
-    for (e = s + len; s != e; s++) {
-        while (*dlen + 10 > *max) *dst = realloc(*dst, *max += EZXML_BUFSIZE);
-
-        switch (*s) {
-        case '\0': return *dst;
-        case '&': *dlen += sprintf(*dst + *dlen, "&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.
-char *ezxml_toxml_r(ezxml_t xml, char **s, size_t *len, size_t *max,
-                    size_t start, char ***attr)
-{
-    int i, j;
-    char *txt = (xml->parent) ? xml->parent->txt : "";
-    size_t off = 0;
-
-    // parent character content up to this tag
-    *s = ezxml_ampencode(txt + start, xml->off - start, s, len, max, 0);
-
-    while (*len + strlen(xml->name) + 4 > *max) // reallocate s
-        *s = realloc(*s, *max += EZXML_BUFSIZE);
-
-    *len += sprintf(*s + *len, "<%s", xml->name); // open tag
-    for (i = 0; xml->attr[i]; i += 2) { // tag attributes
-        if (ezxml_attr(xml, xml->attr[i]) != xml->attr[i + 1]) continue;
-        while (*len + strlen(xml->attr[i]) + 7 > *max) // reallocate s
-            *s = realloc(*s, *max += EZXML_BUFSIZE);
-
-        *len += sprintf(*s + *len, " %s=\"", xml->attr[i]);
-        ezxml_ampencode(xml->attr[i + 1], -1, s, len, max, 1);
-        *len += sprintf(*s + *len, "\"");
-    }
-
-    for (i = 0; attr[i] && strcmp(attr[i][0], xml->name); i++);
-    for (j = 1; attr[i] && attr[i][j]; j += 3) { // default attributes
-        if (! attr[i][j + 1] || ezxml_attr(xml, attr[i][j]) != attr[i][j + 1])
-            continue; // skip duplicates and non-values
-        while (*len + strlen(attr[i][j]) + 7 > *max) // reallocate s
-            *s = realloc(*s, *max += EZXML_BUFSIZE);
-
-        *len += sprintf(*s + *len, " %s=\"", attr[i][j]);
-        ezxml_ampencode(attr[i][j + 1], -1, s, len, max, 1);
-        *len += sprintf(*s + *len, "\"");
-    }
-    *len += sprintf(*s + *len, ">");
-
-    *s = (xml->child) ? ezxml_toxml_r(xml->child, s, len, max, 0, attr) //child
-                      : ezxml_ampencode(xml->txt, -1, s, len, max, 0);  //data
-    
-    while (*len + strlen(xml->name) + 4 > *max) // reallocate s
-        *s = realloc(*s, *max += EZXML_BUFSIZE);
-
-    *len += sprintf(*s + *len, "</%s>", xml->name); // close tag
-
-    while (txt[off] && off < xml->off) off++; // make sure off is within bounds
-    return (xml->ordered) ? ezxml_toxml_r(xml->ordered, s, len, max, off, attr)
-                          : ezxml_ampencode(txt + off, -1, s, len, max, 0);
-}
-
-// Converts an ezxml structure back to xml. Returns a string of xml data that
-// must be freed.
-char *ezxml_toxml(ezxml_t xml)
-{
-    ezxml_t p = (xml) ? xml->parent : NULL, o = (xml) ? xml->ordered : NULL;
-    ezxml_root_t root = (ezxml_root_t)xml;
-    size_t len = 0, max = EZXML_BUFSIZE;
-    char *s = strcpy(malloc(max), ""), *t, *n;
-    int i, j, k;
-
-    if (! xml || ! xml->name) return realloc(s, len + 1);
-    while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; // root tag
-
-    for (i = 0; ! p && root->pi[i]; i++) { // pre-root processing instructions
-        for (k = 2; root->pi[i][k - 1]; k++);
-        for (j = 1; (n = root->pi[i][j]); j++) {
-            if (root->pi[i][k][j - 1] == '>') continue; // not pre-root
-            while (len + strlen(t = root->pi[i][0]) + strlen(n) + 7 > max)
-                s = realloc(s, max += EZXML_BUFSIZE);
-            len += sprintf(s + len, "<?%s%s%s?>\n", t, *n ? " " : "", n);
-        }
-    }
-
-    xml->parent = xml->ordered = NULL;
-    s = ezxml_toxml_r(xml, &s, &len, &max, 0, root->attr);
-    xml->parent = p;
-    xml->ordered = o;
-
-    for (i = 0; ! p && root->pi[i]; i++) { // post-root processing instructions
-        for (k = 2; root->pi[i][k - 1]; k++);
-        for (j = 1; (n = root->pi[i][j]); j++) {
-            if (root->pi[i][k][j - 1] == '<') continue; // not post-root
-            while (len + strlen(t = root->pi[i][0]) + strlen(n) + 7 > max)
-                s = realloc(s, max += EZXML_BUFSIZE);
-            len += sprintf(s + len, "\n<?%s%s%s?>", t, *n ? " " : "", n);
-        }
-    }
-    return realloc(s, len + 1);
-}
-
-// free the memory allocated for the ezxml structure
-void ezxml_free(ezxml_t xml)
-{
-    ezxml_root_t root = (ezxml_root_t)xml;
-    int i, j;
-    char **a, *s;
-
-    if (! xml) return;
-    ezxml_free(xml->child);
-    ezxml_free(xml->ordered);
-
-    if (! xml->parent) { // free root tag allocations
-        for (i = 10; root->ent[i]; i += 2) // 0 - 9 are default entites (<>&"')
-            if ((s = root->ent[i + 1]) < root->s || s > root->e) free(s);
-        free(root->ent); // free list of general entities
-
-        for (i = 0; (a = root->attr[i]); i++) {
-            for (j = 1; a[j++]; j += 2) // free malloced attribute values
-                if (a[j] && (a[j] < root->s || a[j] > root->e)) free(a[j]);
-            free(a);
-        }
-        if (root->attr[0]) free(root->attr); // free default attribute list
-
-        for (i = 0; root->pi[i]; i++) {
-            for (j = 1; root->pi[i][j]; j++);
-            free(root->pi[i][j + 1]);
-            free(root->pi[i]);
-        }            
-        if (root->pi[0]) free(root->pi); // free processing instructions
-
-        if (root->len == -1) free(root->m); // malloced xml data
-#ifndef EZXML_NOMMAP
-        else if (root->len) munmap(root->m, root->len); // mem mapped xml data
-#endif // EZXML_NOMMAP
-        if (root->u) free(root->u); // utf8 conversion
-    }
-
-    ezxml_free_attr(xml->attr); // tag attributes
-    if ((xml->flags & EZXML_TXTM)) free(xml->txt); // character content
-    if ((xml->flags & EZXML_NAMEM)) free(xml->name); // tag name
-    free(xml);
-}
-
-// return parser error message or empty string if none
-const char *ezxml_error(ezxml_t xml)
-{
-    while (xml && xml->parent) xml = xml->parent; // find root tag
-    return (xml) ? ((ezxml_root_t)xml)->err : "";
-}
-
-// returns a new empty ezxml structure with the given root tag name
-ezxml_t ezxml_new(const char *name)
-{
-    static char *ent[] = { "lt;", "&#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 = (char *)name;
-    root->cur = &root->xml;
-    strcpy(root->err, root->xml.txt = "");
-    root->ent = memcpy(malloc(sizeof(ent)), ent, sizeof(ent));
-    root->attr = root->pi = (char ***)(root->xml.attr = EZXML_NIL);
-    return &root->xml;
-}
-
-// inserts an existing tag into an ezxml structure
-ezxml_t ezxml_insert(ezxml_t xml, ezxml_t dest, size_t off)
-{
-    ezxml_t cur, prev, head;
-
-    xml->next = xml->sibling = xml->ordered = NULL;
-    xml->off = off;
-    xml->parent = dest;
-
-    if ((head = dest->child)) { // already have sub tags
-        if (head->off <= off) { // not first subtag
-            for (cur = head; cur->ordered && cur->ordered->off <= off;
-                 cur = cur->ordered);
-            xml->ordered = cur->ordered;
-            cur->ordered = xml;
-        }
-        else { // first subtag
-            xml->ordered = head;
-            dest->child = xml;
-        }
-
-        for (cur = head, prev = NULL; cur && strcmp(cur->name, xml->name);
-             prev = cur, cur = cur->sibling); // find tag type
-        if (cur && cur->off <= off) { // not first of type
-            while (cur->next && cur->next->off <= off) cur = cur->next;
-            xml->next = cur->next;
-            cur->next = xml;
-        }
-        else { // first tag of this type
-            if (prev && cur) prev->sibling = cur->sibling; // remove old first
-            xml->next = cur; // old first tag is now next
-            for (cur = head, prev = NULL; cur && cur->off <= off;
-                 prev = cur, cur = cur->sibling); // new sibling insert point
-            xml->sibling = cur;
-            if (prev) prev->sibling = xml;
-        }
-    }
-    else dest->child = xml; // only sub tag
-
-    return xml;
-}
-
-// Adds a child tag. off is the offset of the child tag relative to the start
-// of the parent tag's character content. Returns the child tag.
-ezxml_t ezxml_add_child(ezxml_t xml, const char *name, size_t off)
-{
-    ezxml_t child;
-
-    if (! xml) return NULL;
-    child = (ezxml_t)memset(malloc(sizeof(struct ezxml)), '\0',
-                            sizeof(struct ezxml));
-    child->name = (char *)name;
-    child->attr = EZXML_NIL;
-    child->txt = "";
-
-    return ezxml_insert(child, xml, off);
-}
-
-// sets the character content for the given tag and returns the tag
-ezxml_t ezxml_set_txt(ezxml_t xml, const char *txt)
-{
-    if (! xml) return NULL;
-    if (xml->flags & EZXML_TXTM) free(xml->txt); // existing txt was malloced
-    xml->flags &= ~EZXML_TXTM;
-    xml->txt = (char *)txt;
-    return xml;
-}
-
-// Sets the given tag attribute or adds a new attribute if not found. A value
-// of NULL will remove the specified attribute. Returns the tag given.
-ezxml_t ezxml_set_attr(ezxml_t xml, const char *name, const char *value)
-{
-    int l = 0, c;
-
-    if (! xml) return NULL;
-    while (xml->attr[l] && strcmp(xml->attr[l], name)) l += 2;
-    if (! xml->attr[l]) { // not found, add as new attribute
-        if (! value) return xml; // nothing to do
-        if (xml->attr == EZXML_NIL) { // first attribute
-            xml->attr = malloc(4 * sizeof(char *));
-            xml->attr[1] = strdup(""); // empty list of malloced names/vals
-        }
-        else xml->attr = realloc(xml->attr, (l + 4) * sizeof(char *));
-
-        xml->attr[l] = (char *)name; // set attribute name
-        xml->attr[l + 2] = NULL; // null terminate attribute list
-        xml->attr[l + 3] = realloc(xml->attr[l + 1],
-                                   (c = strlen(xml->attr[l + 1])) + 2);
-        strcpy(xml->attr[l + 3] + c, " "); // set name/value as not malloced
-        if (xml->flags & EZXML_DUP) xml->attr[l + 3][c] = EZXML_NAMEM;
-    }
-    else if (xml->flags & EZXML_DUP) free((char *)name); // name was strduped
-
-    for (c = l; xml->attr[c]; c += 2); // find end of attribute list
-    if (xml->attr[c + 1][l / 2] & EZXML_TXTM) free(xml->attr[l + 1]); //old val
-    if (xml->flags & EZXML_DUP) xml->attr[c + 1][l / 2] |= EZXML_TXTM;
-    else xml->attr[c + 1][l / 2] &= ~EZXML_TXTM;
-
-    if (value) xml->attr[l + 1] = (char *)value; // set attribute value
-    else { // remove attribute
-        if (xml->attr[c + 1][l / 2] & EZXML_NAMEM) free(xml->attr[l]);
-        memmove(xml->attr + l, xml->attr + l + 2, (c - l + 2) * sizeof(char*));
-        xml->attr = realloc(xml->attr, (c + 2) * sizeof(char *));
-        memmove(xml->attr[c + 1] + (l / 2), xml->attr[c + 1] + (l / 2) + 1,
-                (c / 2) - (l / 2)); // fix list of which name/vals are malloced
-    }
-    xml->flags &= ~EZXML_DUP; // clear strdup() flag
-    return xml;
-}
-
-// sets a flag for the given tag and returns the tag
-ezxml_t ezxml_set_flag(ezxml_t xml, short flag)
-{
-    if (xml) xml->flags |= flag;
-    return xml;
-}
-
-// removes a tag along with its subtags without freeing its memory
-ezxml_t ezxml_cut(ezxml_t xml)
-{
-    ezxml_t cur;
-
-    if (! xml) return NULL; // nothing to do
-    if (xml->next) xml->next->sibling = xml->sibling; // patch sibling list
-
-    if (xml->parent) { // not root tag
-        cur = xml->parent->child; // find head of subtag list
-        if (cur == xml) xml->parent->child = xml->ordered; // first subtag
-        else { // not first subtag
-            while (cur->ordered != xml) cur = cur->ordered;
-            cur->ordered = cur->ordered->ordered; // patch ordered list
-
-            cur = xml->parent->child; // go back to head of subtag list
-            if (strcmp(cur->name, xml->name)) { // not in first sibling list
-                while (strcmp(cur->sibling->name, xml->name))
-                    cur = cur->sibling;
-                if (cur->sibling == xml) { // first of a sibling list
-                    cur->sibling = (xml->next) ? xml->next
-                                               : cur->sibling->sibling;
-                }
-                else cur = cur->sibling; // not first of a sibling list
-            }
-
-            while (cur->next && cur->next != xml) cur = cur->next;
-            if (cur->next) cur->next = cur->next->next; // patch next list
-        }        
-    }
-    xml->ordered = xml->sibling = xml->next = NULL;
-    return xml;
-}
-
-#ifdef EZXML_TEST // test harness
-int main(int argc, char **argv)
-{
-    ezxml_t xml;
-    char *s;
-    int i;
-
-    if (argc != 2) return fprintf(stderr, "usage: %s xmlfile\n", argv[0]);
-
-    xml = ezxml_parse_file(argv[1]);
-    printf("%s\n", (s = ezxml_toxml(xml)));
-    free(s);
-    i = fprintf(stderr, "%s", ezxml_error(xml));
-    ezxml_free(xml);
-    return (i) ? 1 : 0;
-}
-#endif // EZXML_TEST