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root/radiance/ray/src/common/ezxml.c
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Comparing ray/src/common/ezxml.c (file contents):
Revision 2.1 by greg, Wed Jun 17 20:41:47 2009 UTC vs.
Revision 2.2 by greg, Wed Jun 1 00:29:40 2011 UTC

# Line 34 | Line 34 | static const char RCSid[] = "$Id$";
34   #ifndef EZXML_NOMMAP
35   #include <unistd.h>
36   #include <sys/mman.h>
37 < #endif // EZXML_NOMMAP
37 > #endif /* EZXML_NOMMAP */
38   #include <sys/stat.h>
39   #include "ezxml.h"
40  
41 < #define EZXML_WS   "\t\r\n "  // whitespace
42 < #define EZXML_ERRL 128        // maximum error string length
41 > #define EZXML_WS   "\t\r\n "  /* whitespace */
42 > #define EZXML_ERRL 128        /* maximum error string length */
43  
44   typedef struct ezxml_root *ezxml_root_t;
45 < struct ezxml_root {       // additional data for the root tag
46 <    struct ezxml xml;     // is a super-struct built on top of ezxml struct
47 <    ezxml_t cur;          // current xml tree insertion point
48 <    char *m;              // original xml string
49 <    size_t len;           // length of allocated memory for mmap, -1 for malloc
50 <    char *u;              // UTF-8 conversion of string if original was UTF-16
51 <    char *s;              // start of work area
52 <    char *e;              // end of work area
53 <    char **ent;           // general entities (ampersand sequences)
54 <    char ***attr;         // default attributes
55 <    char ***pi;           // processing instructions
56 <    short standalone;     // non-zero if <?xml standalone="yes"?>
57 <    char err[EZXML_ERRL]; // error string
45 > struct ezxml_root {       /* additional data for the root tag */
46 >    struct ezxml xml;     /* is a super-struct built on top of ezxml struct */
47 >    ezxml_t cur;          /* current xml tree insertion point */
48 >    char *m;              /* original xml string */
49 >    size_t len;           /* length of allocated memory for mmap, -1 for malloc */
50 >    char *u;              /* UTF-8 conversion of string if original was UTF-16 */
51 >    char *s;              /* start of work area */
52 >    char *e;              /* end of work area */
53 >    char **ent;           /* general entities (ampersand sequences) */
54 >    char ***attr;         /* default attributes */
55 >    char ***pi;           /* processing instructions */
56 >    short standalone;     /* non-zero if <?xml standalone="yes"?> */
57 >    char err[EZXML_ERRL]; /* error string */
58   };
59  
60 < char *EZXML_NIL[] = { NULL }; // empty, null terminated array of strings
60 > char *EZXML_NIL[] = { NULL }; /* empty, null terminated array of strings */
61  
62 < // returns the first child tag with the given name or NULL if not found
62 > /* returns the first child tag with the given name or NULL if not found */
63   ezxml_t ezxml_child(ezxml_t xml, const char *name)
64   {
65      xml = (xml) ? xml->child : NULL;
# Line 67 | Line 67 | ezxml_t ezxml_child(ezxml_t xml, const char *name)
67      return xml;
68   }
69  
70 < // returns the Nth tag with the same name in the same subsection or NULL if not
71 < // found
70 > /* returns the Nth tag with the same name in the same subsection or NULL if not */
71 > /* found */
72   ezxml_t ezxml_idx(ezxml_t xml, int idx)
73   {
74      for (; xml && idx; idx--) xml = xml->next;
75      return xml;
76   }
77  
78 < // returns the value of the requested tag attribute or NULL if not found
78 > /* returns the value of the requested tag attribute or NULL if not found */
79   const char *ezxml_attr(ezxml_t xml, const char *attr)
80   {
81      int i = 0, j = 1;
# Line 83 | Line 83 | const char *ezxml_attr(ezxml_t xml, const char *attr)
83  
84      if (! xml || ! xml->attr) return NULL;
85      while (xml->attr[i] && strcmp(attr, xml->attr[i])) i += 2;
86 <    if (xml->attr[i]) return xml->attr[i + 1]; // found attribute
86 >    if (xml->attr[i]) return xml->attr[i + 1]; /* found attribute */
87  
88 <    while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; // root tag
88 >    while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; /* root tag */
89      for (i = 0; root->attr[i] && strcmp(xml->name, root->attr[i][0]); i++);
90 <    if (! root->attr[i]) return NULL; // no matching default attributes
90 >    if (! root->attr[i]) return NULL; /* no matching default attributes */
91      while (root->attr[i][j] && strcmp(attr, root->attr[i][j])) j += 3;
92 <    return (root->attr[i][j]) ? root->attr[i][j + 1] : NULL; // found default
92 >    return (root->attr[i][j]) ? root->attr[i][j + 1] : NULL; /* found default */
93   }
94  
95 < // same as ezxml_get but takes an already initialized va_list
95 > /* same as ezxml_get but takes an already initialized va_list */
96   ezxml_t ezxml_vget(ezxml_t xml, va_list ap)
97   {
98      char *name = va_arg(ap, char *);
# Line 105 | Line 105 | ezxml_t ezxml_vget(ezxml_t xml, va_list ap)
105      return (idx < 0) ? xml : ezxml_vget(ezxml_idx(xml, idx), ap);
106   }
107  
108 < // Traverses the xml tree to retrieve a specific subtag. Takes a variable
109 < // length list of tag names and indexes. The argument list must be terminated
110 < // by either an index of -1 or an empty string tag name. Example:
111 < // title = ezxml_get(library, "shelf", 0, "book", 2, "title", -1);
112 < // This retrieves the title of the 3rd book on the 1st shelf of library.
113 < // Returns NULL if not found.
108 > /* Traverses the xml tree to retrieve a specific subtag. Takes a variable */
109 > /* length list of tag names and indexes. The argument list must be terminated */
110 > /* by either an index of -1 or an empty string tag name. Example:  */
111 > /* title = ezxml_get(library, "shelf", 0, "book", 2, "title", -1); */
112 > /* This retrieves the title of the 3rd book on the 1st shelf of library. */
113 > /* Returns NULL if not found. */
114   ezxml_t ezxml_get(ezxml_t xml, ...)
115   {
116      va_list ap;
# Line 122 | Line 122 | ezxml_t ezxml_get(ezxml_t xml, ...)
122      return r;
123   }
124  
125 < // returns a null terminated array of processing instructions for the given
126 < // target
125 > /* returns a null terminated array of processing instructions for the given */
126 > /* target */
127   const char **ezxml_pi(ezxml_t xml, const char *target)
128   {
129      ezxml_root_t root = (ezxml_root_t)xml;
130      int i = 0;
131  
132      if (! root) return (const char **)EZXML_NIL;
133 <    while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; // root tag
134 <    while (root->pi[i] && strcmp(target, root->pi[i][0])) i++; // find target
133 >    while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; /* root tag */
134 >    while (root->pi[i] && strcmp(target, root->pi[i][0])) i++; /* find target */
135      return (const char **)((root->pi[i]) ? root->pi[i] + 1 : EZXML_NIL);
136   }
137  
138 < // set an error string and return root
138 > /* set an error string and return root */
139   ezxml_t ezxml_err(ezxml_root_t root, char *s, const char *err, ...)
140   {
141      va_list ap;
# Line 152 | Line 152 | ezxml_t ezxml_err(ezxml_root_t root, char *s, const ch
152      return &root->xml;
153   }
154  
155 < // Recursively decodes entity and character references and normalizes new lines
156 < // ent is a null terminated array of alternating entity names and values. set t
157 < // to '&' for general entity decoding, '%' for parameter entity decoding, 'c'
158 < // for cdata sections, ' ' for attribute normalization, or '*' for non-cdata
159 < // attribute normalization. Returns s, or if the decoded string is longer than
160 < // s, returns a malloced string that must be freed.
155 > /* Recursively decodes entity and character references and normalizes new lines */
156 > /* ent is a null terminated array of alternating entity names and values. set t */
157 > /* to '&' for general entity decoding, '%' for parameter entity decoding, 'c' */
158 > /* for cdata sections, ' ' for attribute normalization, or '*' for non-cdata */
159 > /* attribute normalization. Returns s, or if the decoded string is longer than */
160 > /* s, returns a malloced string that must be freed. */
161   char *ezxml_decode(char *s, char **ent, char t)
162   {
163      char *e, *r = s, *m = s;
164      long b, c, d, l;
165  
166 <    for (; *s; s++) { // normalize line endings
166 >    for (; *s; s++) { /* normalize line endings */
167          while (*s == '\r') {
168              *(s++) = '\n';
169              if (*s == '\n') memmove(s, (s + 1), strlen(s));
# Line 174 | Line 174 | char *ezxml_decode(char *s, char **ent, char t)
174          while (*s && *s != '&' && (*s != '%' || t != '%') && !isspace(*s)) s++;
175  
176          if (! *s) break;
177 <        else if (t != 'c' && ! strncmp(s, "&#", 2)) { // character reference
178 <            if (s[2] == 'x') c = strtol(s + 3, &e, 16); // base 16
179 <            else c = strtol(s + 2, &e, 10); // base 10
180 <            if (! c || *e != ';') { s++; continue; } // not a character ref
177 >        else if (t != 'c' && ! strncmp(s, "&#", 2)) { /* character reference */
178 >            if (s[2] == 'x') c = strtol(s + 3, &e, 16); /* base 16 */
179 >            else c = strtol(s + 2, &e, 10); /* base 10 */
180 >            if (! c || *e != ';') { s++; continue; } /* not a character ref */
181  
182 <            if (c < 0x80) *(s++) = c; // US-ASCII subset
183 <            else { // multi-byte UTF-8 sequence
184 <                for (b = 0, d = c; d; d /= 2) b++; // number of bits in c
185 <                b = (b - 2) / 5; // number of bytes in payload
186 <                *(s++) = (0xFF << (7 - b)) | (c >> (6 * b)); // head
187 <                while (b) *(s++) = 0x80 | ((c >> (6 * --b)) & 0x3F); // payload
182 >            if (c < 0x80) *(s++) = c; /* US-ASCII subset */
183 >            else { /* multi-byte UTF-8 sequence */
184 >                for (b = 0, d = c; d; d /= 2) b++; /* number of bits in c */
185 >                b = (b - 2) / 5; /* number of bytes in payload */
186 >                *(s++) = (0xFF << (7 - b)) | (c >> (6 * b)); /* head */
187 >                while (b) *(s++) = 0x80 | ((c >> (6 * --b)) & 0x3F); /* payload */
188              }
189  
190              memmove(s, strchr(s, ';') + 1, strlen(strchr(s, ';')));
191          }
192          else if ((*s == '&' && (t == '&' || t == ' ' || t == '*')) ||
193 <                 (*s == '%' && t == '%')) { // entity reference
193 >                 (*s == '%' && t == '%')) { /* entity reference */
194              for (b = 0; ent[b] && strncmp(s + 1, ent[b], strlen(ent[b]));
195 <                 b += 2); // find entity in entity list
195 >                 b += 2); /* find entity in entity list */
196  
197 <            if (ent[b++]) { // found a match
197 >            if (ent[b++]) { /* found a match */
198                  if ((c = strlen(ent[b])) - 1 > (e = strchr(s, ';')) - s) {
199 <                    l = (d = (s - r)) + c + strlen(e); // new length
199 >                    l = (d = (s - r)) + c + strlen(e); /* new length */
200                      r = (r == m) ? strcpy(malloc(l), r) : realloc(r, l);
201 <                    e = strchr((s = r + d), ';'); // fix up pointers
201 >                    e = strchr((s = r + d), ';'); /* fix up pointers */
202                  }
203  
204 <                memmove(s + c, e + 1, strlen(e)); // shift rest of string
205 <                strncpy(s, ent[b], c); // copy in replacement text
204 >                memmove(s + c, e + 1, strlen(e)); /* shift rest of string */
205 >                strncpy(s, ent[b], c); /* copy in replacement text */
206              }
207 <            else s++; // not a known entity
207 >            else s++; /* not a known entity */
208          }
209          else if ((t == ' ' || t == '*') && isspace(*s)) *(s++) = ' ';
210 <        else s++; // no decoding needed
210 >        else s++; /* no decoding needed */
211      }
212  
213 <    if (t == '*') { // normalize spaces for non-cdata attributes
213 >    if (t == '*') { /* normalize spaces for non-cdata attributes */
214          for (s = r; *s; s++) {
215              if ((l = strspn(s, " "))) memmove(s, s + l, strlen(s + l) + 1);
216              while (*s && *s != ' ') s++;
217          }
218 <        if (--s >= r && *s == ' ') *s = '\0'; // trim any trailing space
218 >        if (--s >= r && *s == ' ') *s = '\0'; /* trim any trailing space */
219      }
220      return r;
221   }
222  
223 < // called when parser finds start of new tag
223 > /* called when parser finds start of new tag */
224   void ezxml_open_tag(ezxml_root_t root, char *name, char **attr)
225   {
226      ezxml_t xml = root->cur;
227      
228      if (xml->name) xml = ezxml_add_child(xml, name, strlen(xml->txt));
229 <    else xml->name = name; // first open tag
229 >    else xml->name = name; /* first open tag */
230  
231      xml->attr = attr;
232 <    root->cur = xml; // update tag insertion point
232 >    root->cur = xml; /* update tag insertion point */
233   }
234  
235 < // called when parser finds character content between open and closing tag
235 > /* called when parser finds character content between open and closing tag */
236   void ezxml_char_content(ezxml_root_t root, char *s, size_t len, char t)
237   {
238      ezxml_t xml = root->cur;
239      char *m = s;
240      size_t l;
241  
242 <    if (! xml || ! xml->name || ! len) return; // sanity check
242 >    if (! xml || ! xml->name || ! len) return; /* sanity check */
243  
244 <    s[len] = '\0'; // null terminate text (calling functions anticipate this)
244 >    s[len] = '\0'; /* null terminate text (calling functions anticipate this) */
245      len = strlen(s = ezxml_decode(s, root->ent, t)) + 1;
246  
247 <    if (! *(xml->txt)) xml->txt = s; // initial character content
248 <    else { // allocate our own memory and make a copy
249 <        xml->txt = (xml->flags & EZXML_TXTM) // allocate some space
247 >    if (! *(xml->txt)) xml->txt = s; /* initial character content */
248 >    else { /* allocate our own memory and make a copy */
249 >        xml->txt = (xml->flags & EZXML_TXTM) /* allocate some space */
250                     ? realloc(xml->txt, (l = strlen(xml->txt)) + len)
251                     : strcpy(malloc((l = strlen(xml->txt)) + len), xml->txt);
252 <        strcpy(xml->txt + l, s); // add new char content
253 <        if (s != m) free(s); // free s if it was malloced by ezxml_decode()
252 >        strcpy(xml->txt + l, s); /* add new char content */
253 >        if (s != m) free(s); /* free s if it was malloced by ezxml_decode() */
254      }
255  
256      if (xml->txt != m) ezxml_set_flag(xml, EZXML_TXTM);
257   }
258  
259 < // called when parser finds closing tag
259 > /* called when parser finds closing tag */
260   ezxml_t ezxml_close_tag(ezxml_root_t root, char *name, char *s)
261   {
262      if (! root->cur || ! root->cur->name || strcmp(name, root->cur->name))
# Line 266 | Line 266 | ezxml_t ezxml_close_tag(ezxml_root_t root, char *name,
266      return NULL;
267   }
268  
269 < // checks for circular entity references, returns non-zero if no circular
270 < // references are found, zero otherwise
269 > /* checks for circular entity references, returns non-zero if no circular */
270 > /* references are found, zero otherwise */
271   int ezxml_ent_ok(char *name, char *s, char **ent)
272   {
273      int i;
274  
275      for (; ; s++) {
276 <        while (*s && *s != '&') s++; // find next entity reference
276 >        while (*s && *s != '&') s++; /* find next entity reference */
277          if (! *s) return 1;
278 <        if (! strncmp(s + 1, name, strlen(name))) return 0; // circular ref.
278 >        if (! strncmp(s + 1, name, strlen(name))) return 0; /* circular ref. */
279          for (i = 0; ent[i] && strncmp(ent[i], s + 1, strlen(ent[i])); i += 2);
280          if (ent[i] && ! ezxml_ent_ok(name, ent[i + 1], ent)) return 0;
281      }
282   }
283  
284 < // called when the parser finds a processing instruction
284 > /* called when the parser finds a processing instruction */
285   void ezxml_proc_inst(ezxml_root_t root, char *s, size_t len)
286   {
287      int i = 0, j = 1;
288      char *target = s;
289  
290 <    s[len] = '\0'; // null terminate instruction
290 >    s[len] = '\0'; /* null terminate instruction */
291      if (*(s += strcspn(s, EZXML_WS))) {
292 <        *s = '\0'; // null terminate target
293 <        s += strspn(s + 1, EZXML_WS) + 1; // skip whitespace after target
292 >        *s = '\0'; /* null terminate target */
293 >        s += strspn(s + 1, EZXML_WS) + 1; /* skip whitespace after target */
294      }
295  
296 <    if (! strcmp(target, "xml")) { // <?xml ... ?>
296 >    if (! strcmp(target, "xml")) { /* <?xml ... ?> */
297          if ((s = strstr(s, "standalone")) && ! strncmp(s + strspn(s + 10,
298              EZXML_WS "='\"") + 10, "yes", 3)) root->standalone = 1;
299          return;
300      }
301  
302 <    if (! root->pi[0]) *(root->pi = malloc(sizeof(char **))) = NULL; //first pi
302 >    if (! root->pi[0]) *(root->pi = malloc(sizeof(char **))) = NULL; /*first pi */
303  
304 <    while (root->pi[i] && strcmp(target, root->pi[i][0])) i++; // find target
305 <    if (! root->pi[i]) { // new target
304 >    while (root->pi[i] && strcmp(target, root->pi[i][0])) i++; /* find target */
305 >    if (! root->pi[i]) { /* new target */
306          root->pi = realloc(root->pi, sizeof(char **) * (i + 2));
307          root->pi[i] = malloc(sizeof(char *) * 3);
308          root->pi[i][0] = target;
309 <        root->pi[i][1] = (char *)(root->pi[i + 1] = NULL); // terminate pi list
310 <        root->pi[i][2] = strdup(""); // empty document position list
309 >        root->pi[i][1] = (char *)(root->pi[i + 1] = NULL); /* terminate pi list */
310 >        root->pi[i][2] = strdup(""); /* empty document position list */
311      }
312  
313 <    while (root->pi[i][j]) j++; // find end of instruction list for this target
313 >    while (root->pi[i][j]) j++; /* find end of instruction list for this target */
314      root->pi[i] = realloc(root->pi[i], sizeof(char *) * (j + 3));
315      root->pi[i][j + 2] = realloc(root->pi[i][j + 1], j + 1);
316      strcpy(root->pi[i][j + 2] + j - 1, (root->xml.name) ? ">" : "<");
317 <    root->pi[i][j + 1] = NULL; // null terminate pi list for this target
318 <    root->pi[i][j] = s; // set instruction
317 >    root->pi[i][j + 1] = NULL; /* null terminate pi list for this target */
318 >    root->pi[i][j] = s; /* set instruction */
319   }
320  
321 < // called when the parser finds an internal doctype subset
321 > /* called when the parser finds an internal doctype subset */
322   short ezxml_internal_dtd(ezxml_root_t root, char *s, size_t len)
323   {
324      char q, *c, *t, *n = NULL, *v, **ent, **pe;
# Line 327 | Line 327 | short ezxml_internal_dtd(ezxml_root_t root, char *s, s
327      pe = memcpy(malloc(sizeof(EZXML_NIL)), EZXML_NIL, sizeof(EZXML_NIL));
328  
329      for (s[len] = '\0'; s; ) {
330 <        while (*s && *s != '<' && *s != '%') s++; // find next declaration
330 >        while (*s && *s != '<' && *s != '%') s++; /* find next declaration */
331  
332          if (! *s) break;
333 <        else if (! strncmp(s, "<!ENTITY", 8)) { // parse entity definitions
334 <            c = s += strspn(s + 8, EZXML_WS) + 8; // skip white space separator
335 <            n = s + strspn(s, EZXML_WS "%"); // find name
336 <            *(s = n + strcspn(n, EZXML_WS)) = ';'; // append ; to name
333 >        else if (! strncmp(s, "<!ENTITY", 8)) { /* parse entity definitions */
334 >            c = s += strspn(s + 8, EZXML_WS) + 8; /* skip white space separator */
335 >            n = s + strspn(s, EZXML_WS "%"); /* find name */
336 >            *(s = n + strcspn(n, EZXML_WS)) = ';'; /* append ; to name */
337  
338 <            v = s + strspn(s + 1, EZXML_WS) + 1; // find value
339 <            if ((q = *(v++)) != '"' && q != '\'') { // skip externals
338 >            v = s + strspn(s + 1, EZXML_WS) + 1; /* find value */
339 >            if ((q = *(v++)) != '"' && q != '\'') { /* skip externals */
340                  s = strchr(s, '>');
341                  continue;
342              }
343  
344              for (i = 0, ent = (*c == '%') ? pe : root->ent; ent[i]; i++);
345 <            ent = realloc(ent, (i + 3) * sizeof(char *)); // space for next ent
345 >            ent = realloc(ent, (i + 3) * sizeof(char *)); /* space for next ent */
346              if (*c == '%') pe = ent;
347              else root->ent = ent;
348  
349 <            *(++s) = '\0'; // null terminate name
350 <            if ((s = strchr(v, q))) *(s++) = '\0'; // null terminate value
351 <            ent[i + 1] = ezxml_decode(v, pe, '%'); // set value
352 <            ent[i + 2] = NULL; // null terminate entity list
353 <            if (! ezxml_ent_ok(n, ent[i + 1], ent)) { // circular reference
349 >            *(++s) = '\0'; /* null terminate name */
350 >            if ((s = strchr(v, q))) *(s++) = '\0'; /* null terminate value */
351 >            ent[i + 1] = ezxml_decode(v, pe, '%'); /* set value */
352 >            ent[i + 2] = NULL; /* null terminate entity list */
353 >            if (! ezxml_ent_ok(n, ent[i + 1], ent)) { /* circular reference */
354                  if (ent[i + 1] != v) free(ent[i + 1]);
355                  ezxml_err(root, v, "circular entity declaration &%s", n);
356                  break;
357              }
358 <            else ent[i] = n; // set entity name
358 >            else ent[i] = n; /* set entity name */
359          }
360 <        else if (! strncmp(s, "<!ATTLIST", 9)) { // parse default attributes
361 <            t = s + strspn(s + 9, EZXML_WS) + 9; // skip whitespace separator
360 >        else if (! strncmp(s, "<!ATTLIST", 9)) { /* parse default attributes */
361 >            t = s + strspn(s + 9, EZXML_WS) + 9; /* skip whitespace separator */
362              if (! *t) { ezxml_err(root, t, "unclosed <!ATTLIST"); break; }
363              if (*(s = t + strcspn(t, EZXML_WS ">")) == '>') continue;
364 <            else *s = '\0'; // null terminate tag name
364 >            else *s = '\0'; /* null terminate tag name */
365              for (i = 0; root->attr[i] && strcmp(n, root->attr[i][0]); i++);
366  
367              while (*(n = ++s + strspn(s, EZXML_WS)) && *n != '>') {
368 <                if (*(s = n + strcspn(n, EZXML_WS))) *s = '\0'; // attr name
368 >                if (*(s = n + strcspn(n, EZXML_WS))) *s = '\0'; /* attr name */
369                  else { ezxml_err(root, t, "malformed <!ATTLIST"); break; }
370  
371 <                s += strspn(s + 1, EZXML_WS) + 1; // find next token
372 <                c = (strncmp(s, "CDATA", 5)) ? "*" : " "; // is it cdata?
371 >                s += strspn(s + 1, EZXML_WS) + 1; /* find next token */
372 >                c = (strncmp(s, "CDATA", 5)) ? "*" : " "; /* is it cdata? */
373                  if (! strncmp(s, "NOTATION", 8))
374                      s += strspn(s + 8, EZXML_WS) + 8;
375                  s = (*s == '(') ? strchr(s, ')') : s + strcspn(s, EZXML_WS);
376                  if (! s) { ezxml_err(root, t, "malformed <!ATTLIST"); break; }
377  
378 <                s += strspn(s, EZXML_WS ")"); // skip white space separator
378 >                s += strspn(s, EZXML_WS ")"); /* skip white space separator */
379                  if (! strncmp(s, "#FIXED", 6))
380                      s += strspn(s + 6, EZXML_WS) + 6;
381 <                if (*s == '#') { // no default value
381 >                if (*s == '#') { /* no default value */
382                      s += strcspn(s, EZXML_WS ">") - 1;
383 <                    if (*c == ' ') continue; // cdata is default, nothing to do
383 >                    if (*c == ' ') continue; /* cdata is default, nothing to do */
384                      v = NULL;
385                  }
386 <                else if ((*s == '"' || *s == '\'')  &&  // default value
386 >                else if ((*s == '"' || *s == '\'')  &&  /* default value */
387                           (s = strchr(v = s + 1, *s))) *s = '\0';
388                  else { ezxml_err(root, t, "malformed <!ATTLIST"); break; }
389  
390 <                if (! root->attr[i]) { // new tag name
390 >                if (! root->attr[i]) { /* new tag name */
391                      root->attr = (! i) ? malloc(2 * sizeof(char **))
392                                         : realloc(root->attr,
393                                                   (i + 2) * sizeof(char **));
394                      root->attr[i] = malloc(2 * sizeof(char *));
395 <                    root->attr[i][0] = t; // set tag name
395 >                    root->attr[i][0] = t; /* set tag name */
396                      root->attr[i][1] = (char *)(root->attr[i + 1] = NULL);
397                  }
398  
399 <                for (j = 1; root->attr[i][j]; j += 3); // find end of list
399 >                for (j = 1; root->attr[i][j]; j += 3); /* find end of list */
400                  root->attr[i] = realloc(root->attr[i],
401                                          (j + 4) * sizeof(char *));
402  
403 <                root->attr[i][j + 3] = NULL; // null terminate list
404 <                root->attr[i][j + 2] = c; // is it cdata?
403 >                root->attr[i][j + 3] = NULL; /* null terminate list */
404 >                root->attr[i][j + 2] = c; /* is it cdata? */
405                  root->attr[i][j + 1] = (v) ? ezxml_decode(v, root->ent, *c)
406                                             : NULL;
407 <                root->attr[i][j] = n; // attribute name
407 >                root->attr[i][j] = n; /* attribute name  */
408              }
409          }
410 <        else if (! strncmp(s, "<!--", 4)) s = strstr(s + 4, "-->"); // comments
411 <        else if (! strncmp(s, "<?", 2)) { // processing instructions
410 >        else if (! strncmp(s, "<!--", 4)) s = strstr(s + 4, "-->"); /* comments */
411 >        else if (! strncmp(s, "<?", 2)) { /* processing instructions */
412              if ((s = strstr(c = s + 2, "?>")))
413                  ezxml_proc_inst(root, c, s++ - c);
414          }
415 <        else if (*s == '<') s = strchr(s, '>'); // skip other declarations
415 >        else if (*s == '<') s = strchr(s, '>'); /* skip other declarations */
416          else if (*(s++) == '%' && ! root->standalone) break;
417      }
418  
# Line 420 | Line 420 | short ezxml_internal_dtd(ezxml_root_t root, char *s, s
420      return ! *root->err;
421   }
422  
423 < // Converts a UTF-16 string to UTF-8. Returns a new string that must be freed
424 < // or NULL if no conversion was needed.
423 > /* Converts a UTF-16 string to UTF-8. Returns a new string that must be freed */
424 > /* or NULL if no conversion was needed. */
425   char *ezxml_str2utf8(char **s, size_t *len)
426   {
427      char *u;
# Line 429 | Line 429 | char *ezxml_str2utf8(char **s, size_t *len)
429      long c, d;
430      int b, be = (**s == '\xFE') ? 1 : (**s == '\xFF') ? 0 : -1;
431  
432 <    if (be == -1) return NULL; // not UTF-16
432 >    if (be == -1) return NULL; /* not UTF-16 */
433  
434      u = malloc(max);
435      for (sl = 2; sl < *len - 1; sl += 2) {
436 <        c = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF)  //UTF-16BE
437 <                 : (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF); //UTF-16LE
438 <        if (c >= 0xD800 && c <= 0xDFFF && (sl += 2) < *len - 1) { // high-half
436 >        c = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF)  /*UTF-16BE */
437 >                 : (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF); /*UTF-16LE */
438 >        if (c >= 0xD800 && c <= 0xDFFF && (sl += 2) < *len - 1) { /* high-half */
439              d = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF)
440                       : (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF);
441              c = (((c & 0x3FF) << 10) | (d & 0x3FF)) + 0x10000;
442          }
443  
444          while (l + 6 > max) u = realloc(u, max += EZXML_BUFSIZE);
445 <        if (c < 0x80) u[l++] = c; // US-ASCII subset
446 <        else { // multi-byte UTF-8 sequence
447 <            for (b = 0, d = c; d; d /= 2) b++; // bits in c
448 <            b = (b - 2) / 5; // bytes in payload
449 <            u[l++] = (0xFF << (7 - b)) | (c >> (6 * b)); // head
450 <            while (b) u[l++] = 0x80 | ((c >> (6 * --b)) & 0x3F); // payload
445 >        if (c < 0x80) u[l++] = c; /* US-ASCII subset */
446 >        else { /* multi-byte UTF-8 sequence */
447 >            for (b = 0, d = c; d; d /= 2) b++; /* bits in c */
448 >            b = (b - 2) / 5; /* bytes in payload */
449 >            u[l++] = (0xFF << (7 - b)) | (c >> (6 * b)); /* head */
450 >            while (b) u[l++] = 0x80 | ((c >> (6 * --b)) & 0x3F); /* payload */
451          }
452      }
453      return *s = realloc(u, *len = l);
454   }
455  
456 < // frees a tag attribute list
456 > /* frees a tag attribute list */
457   void ezxml_free_attr(char **attr) {
458      int i = 0;
459      char *m;
460      
461 <    if (! attr || attr == EZXML_NIL) return; // nothing to free
462 <    while (attr[i]) i += 2; // find end of attribute list
463 <    m = attr[i + 1]; // list of which names and values are malloced
461 >    if (! attr || attr == EZXML_NIL) return; /* nothing to free */
462 >    while (attr[i]) i += 2; /* find end of attribute list */
463 >    m = attr[i + 1]; /* list of which names and values are malloced */
464      for (i = 0; m[i]; i++) {
465          if (m[i] & EZXML_NAMEM) free(attr[i * 2]);
466          if (m[i] & EZXML_TXTM) free(attr[(i * 2) + 1]);
# Line 469 | Line 469 | void ezxml_free_attr(char **attr) {
469      free(attr);
470   }
471  
472 < // parse the given xml string and return an ezxml structure
472 > /* parse the given xml string and return an ezxml structure */
473   ezxml_t ezxml_parse_str(char *s, size_t len)
474   {
475      ezxml_root_t root = (ezxml_root_t)ezxml_new(NULL);
476 <    char q, e, *d, **attr, **a = NULL; // initialize a to avoid compile warning
476 >    char q, e, *d, **attr, **a = NULL; /* initialize a to avoid compile warning */
477      int l, i, j;
478  
479      root->m = s;
480      if (! len) return ezxml_err(root, NULL, "root tag missing");
481 <    root->u = ezxml_str2utf8(&s, &len); // convert utf-16 to utf-8
482 <    root->e = (root->s = s) + len; // record start and end of work area
481 >    root->u = ezxml_str2utf8(&s, &len); /* convert utf-16 to utf-8 */
482 >    root->e = (root->s = s) + len; /* record start and end of work area */
483      
484 <    e = s[len - 1]; // save end char
485 <    s[len - 1] = '\0'; // turn end char into null terminator
484 >    e = s[len - 1]; /* save end char */
485 >    s[len - 1] = '\0'; /* turn end char into null terminator */
486  
487 <    while (*s && *s != '<') s++; // find first tag
487 >    while (*s && *s != '<') s++; /* find first tag */
488      if (! *s) return ezxml_err(root, s, "root tag missing");
489  
490      for (; ; ) {
491          attr = (char **)EZXML_NIL;
492          d = ++s;
493          
494 <        if (isalpha(*s) || *s == '_' || *s == ':' || *s < '\0') { // new tag
494 >        if (isalpha(*s) || *s == '_' || *s == ':' || *s < '\0') { /* new tag */
495              if (! root->cur)
496                  return ezxml_err(root, d, "markup outside of root element");
497  
498              s += strcspn(s, EZXML_WS "/>");
499 <            while (isspace(*s)) *(s++) = '\0'; // null terminate tag name
499 >            while (isspace(*s)) *(s++) = '\0'; /* null terminate tag name */
500    
501 <            if (*s && *s != '/' && *s != '>') // find tag in default attr list
501 >            if (*s && *s != '/' && *s != '>') /* find tag in default attr list */
502                  for (i = 0; (a = root->attr[i]) && strcmp(a[0], d); i++);
503  
504 <            for (l = 0; *s && *s != '/' && *s != '>'; l += 2) { // new attrib
504 >            for (l = 0; *s && *s != '/' && *s != '>'; l += 2) { /* new attrib */
505                  attr = (l) ? realloc(attr, (l + 4) * sizeof(char *))
506 <                           : malloc(4 * sizeof(char *)); // allocate space
506 >                           : malloc(4 * sizeof(char *)); /* allocate space */
507                  attr[l + 3] = (l) ? realloc(attr[l + 1], (l / 2) + 2)
508 <                                  : malloc(2); // mem for list of maloced vals
509 <                strcpy(attr[l + 3] + (l / 2), " "); // value is not malloced
510 <                attr[l + 2] = NULL; // null terminate list
511 <                attr[l + 1] = ""; // temporary attribute value
512 <                attr[l] = s; // set attribute name
508 >                                  : malloc(2); /* mem for list of maloced vals */
509 >                strcpy(attr[l + 3] + (l / 2), " "); /* value is not malloced */
510 >                attr[l + 2] = NULL; /* null terminate list */
511 >                attr[l + 1] = ""; /* temporary attribute value */
512 >                attr[l] = s; /* set attribute name */
513  
514                  s += strcspn(s, EZXML_WS "=/>");
515                  if (*s == '=' || isspace(*s)) {
516 <                    *(s++) = '\0'; // null terminate tag attribute name
516 >                    *(s++) = '\0'; /* null terminate tag attribute name */
517                      q = *(s += strspn(s, EZXML_WS "="));
518 <                    if (q == '"' || q == '\'') { // attribute value
518 >                    if (q == '"' || q == '\'') { /* attribute value */
519                          attr[l + 1] = ++s;
520                          while (*s && *s != q) s++;
521 <                        if (*s) *(s++) = '\0'; // null terminate attribute val
521 >                        if (*s) *(s++) = '\0'; /* null terminate attribute val */
522                          else {
523                              ezxml_free_attr(attr);
524                              return ezxml_err(root, d, "missing %c", q);
# Line 528 | Line 528 | ezxml_t ezxml_parse_str(char *s, size_t len)
528                          attr[l + 1] = ezxml_decode(attr[l + 1], root->ent, (a
529                                                     && a[j]) ? *a[j + 2] : ' ');
530                          if (attr[l + 1] < d || attr[l + 1] > s)
531 <                            attr[l + 3][l / 2] = EZXML_TXTM; // value malloced
531 >                            attr[l + 3][l / 2] = EZXML_TXTM; /* value malloced */
532                      }
533                  }
534                  while (isspace(*s)) s++;
535              }
536  
537 <            if (*s == '/') { // self closing tag
537 >            if (*s == '/') { /* self closing tag */
538                  *(s++) = '\0';
539                  if ((*s && *s != '>') || (! *s && e != '>')) {
540                      if (l) ezxml_free_attr(attr);
# Line 543 | Line 543 | ezxml_t ezxml_parse_str(char *s, size_t len)
543                  ezxml_open_tag(root, d, attr);
544                  ezxml_close_tag(root, d, s);
545              }
546 <            else if ((q = *s) == '>' || (! *s && e == '>')) { // open tag
547 <                *s = '\0'; // temporarily null terminate tag name
546 >            else if ((q = *s) == '>' || (! *s && e == '>')) { /* open tag */
547 >                *s = '\0'; /* temporarily null terminate tag name */
548                  ezxml_open_tag(root, d, attr);
549                  *s = q;
550              }
# Line 553 | Line 553 | ezxml_t ezxml_parse_str(char *s, size_t len)
553                  return ezxml_err(root, d, "missing >");
554              }
555          }
556 <        else if (*s == '/') { // close tag
556 >        else if (*s == '/') { /* close tag */
557              s += strcspn(d = s + 1, EZXML_WS ">") + 1;
558              if (! (q = *s) && e != '>') return ezxml_err(root, d, "missing >");
559 <            *s = '\0'; // temporarily null terminate tag name
559 >            *s = '\0'; /* temporarily null terminate tag name */
560              if (ezxml_close_tag(root, d, s)) return &root->xml;
561              if (isspace(*s = q)) s += strspn(s, EZXML_WS);
562          }
563 <        else if (! strncmp(s, "!--", 3)) { // xml comment
563 >        else if (! strncmp(s, "!--", 3)) { /* xml comment */
564              if (! (s = strstr(s + 3, "--")) || (*(s += 2) != '>' && *s) ||
565                  (! *s && e != '>')) return ezxml_err(root, d, "unclosed <!--");
566          }
567 <        else if (! strncmp(s, "![CDATA[", 8)) { // cdata
567 >        else if (! strncmp(s, "![CDATA[", 8)) { /* cdata */
568              if ((s = strstr(s, "]]>")))
569                  ezxml_char_content(root, d + 8, (s += 2) - d - 10, 'c');
570              else return ezxml_err(root, d, "unclosed <![CDATA[");
571          }
572 <        else if (! strncmp(s, "!DOCTYPE", 8)) { // dtd
572 >        else if (! strncmp(s, "!DOCTYPE", 8)) { /* dtd */
573              for (l = 0; *s && ((! l && *s != '>') || (l && (*s != ']' ||
574                   *(s + strspn(s + 1, EZXML_WS) + 1) != '>')));
575                   l = (*s == '[') ? 1 : l) s += strcspn(s + 1, "[]>") + 1;
# Line 578 | Line 578 | ezxml_t ezxml_parse_str(char *s, size_t len)
578              d = (l) ? strchr(d, '[') + 1 : d;
579              if (l && ! ezxml_internal_dtd(root, d, s++ - d)) return &root->xml;
580          }
581 <        else if (*s == '?') { // <?...?> processing instructions
581 >        else if (*s == '?') { /* <?...?> processing instructions */
582              do { s = strchr(s, '?'); } while (s && *(++s) && *s != '>');
583              if (! s || (! *s && e != '>'))
584                  return ezxml_err(root, d, "unclosed <?");
# Line 589 | Line 589 | ezxml_t ezxml_parse_str(char *s, size_t len)
589          if (! s || ! *s) break;
590          *s = '\0';
591          d = ++s;
592 <        if (*s && *s != '<') { // tag character content
592 >        if (*s && *s != '<') { /* tag character content */
593              while (*s && *s != '<') s++;
594              if (*s) ezxml_char_content(root, d, s - d, '&');
595              else break;
# Line 602 | Line 602 | ezxml_t ezxml_parse_str(char *s, size_t len)
602      else return ezxml_err(root, d, "unclosed tag <%s>", root->cur->name);
603   }
604  
605 < // Wrapper for ezxml_parse_str() that accepts a file stream. Reads the entire
606 < // stream into memory and then parses it. For xml files, use ezxml_parse_file()
607 < // or ezxml_parse_fd()
605 > /* Wrapper for ezxml_parse_str() that accepts a file stream. Reads the entire */
606 > /* stream into memory and then parses it. For xml files, use ezxml_parse_file() */
607 > /* or ezxml_parse_fd() */
608   ezxml_t ezxml_parse_fp(FILE *fp)
609   {
610      ezxml_root_t root;
# Line 619 | Line 619 | ezxml_t ezxml_parse_fp(FILE *fp)
619  
620      if (! s) return NULL;
621      root = (ezxml_root_t)ezxml_parse_str(s, len);
622 <    root->len = -1; // so we know to free s in ezxml_free()
622 >    root->len = -1; /* so we know to free s in ezxml_free() */
623      return &root->xml;
624   }
625  
626 < // A wrapper for ezxml_parse_str() that accepts a file descriptor. First
627 < // attempts to mem map the file. Failing that, reads the file into memory.
628 < // Returns NULL on failure.
626 > /* A wrapper for ezxml_parse_str() that accepts a file descriptor. First */
627 > /* attempts to mem map the file. Failing that, reads the file into memory. */
628 > /* Returns NULL on failure. */
629   ezxml_t ezxml_parse_fd(int fd)
630   {
631      ezxml_root_t root;
# Line 640 | Line 640 | ezxml_t ezxml_parse_fd(int fd)
640      l = (st.st_size + sysconf(_SC_PAGESIZE) - 1) & ~(sysconf(_SC_PAGESIZE) -1);
641      if ((m = mmap(NULL, l, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0))
642                  !=  MAP_FAILED) {
643 <        madvise(m, l, MADV_SEQUENTIAL); // optimize for sequential access
643 >        madvise(m, l, MADV_SEQUENTIAL); /* optimize for sequential access */
644          root = (ezxml_root_t)ezxml_parse_str(m, st.st_size);
645 <        madvise(m, root->len = l, MADV_NORMAL); // put it back to normal
645 >        madvise(m, root->len = l, MADV_NORMAL); /* put it back to normal */
646      }
647 <    else { // mmap failed, read file into memory
648 < #endif // EZXML_NOMMAP
647 >    else { /* mmap failed, read file into memory */
648 > #endif /* EZXML_NOMMAP */
649          l = read(fd, m = malloc(st.st_size), st.st_size);
650          root = (ezxml_root_t)ezxml_parse_str(m, l);
651 <        root->len = -1; // so we know to free s in ezxml_free()
651 >        root->len = -1; /* so we know to free s in ezxml_free() */
652   #ifndef EZXML_NOMMAP
653      }
654 < #endif // EZXML_NOMMAP
654 > #endif /* EZXML_NOMMAP */
655      return &root->xml;
656   }
657  
658 < // a wrapper for ezxml_parse_fd that accepts a file name
658 > /* a wrapper for ezxml_parse_fd that accepts a file name */
659   ezxml_t ezxml_parse_file(const char *file)
660   {
661      int fd = open(file, O_RDONLY, 0);
# Line 665 | Line 665 | ezxml_t ezxml_parse_file(const char *file)
665      return xml;
666   }
667  
668 < // Encodes ampersand sequences appending the results to *dst, reallocating *dst
669 < // if length excedes max. a is non-zero for attribute encoding. Returns *dst
668 > /* Encodes ampersand sequences appending the results to *dst, reallocating *dst */
669 > /* if length excedes max. a is non-zero for attribute encoding. Returns *dst */
670   char *ezxml_ampencode(const char *s, size_t len, char **dst, size_t *dlen,
671                        size_t *max, short a)
672   {
# Line 690 | Line 690 | char *ezxml_ampencode(const char *s, size_t len, char
690      return *dst;
691   }
692  
693 < // Recursively converts each tag to xml appending it to *s. Reallocates *s if
694 < // its length excedes max. start is the location of the previous tag in the
695 < // parent tag's character content. Returns *s.
693 > /* Recursively converts each tag to xml appending it to *s. Reallocates *s if */
694 > /* its length excedes max. start is the location of the previous tag in the */
695 > /* parent tag's character content. Returns *s. */
696   char *ezxml_toxml_r(ezxml_t xml, char **s, size_t *len, size_t *max,
697                      size_t start, char ***attr)
698   {
# Line 700 | Line 700 | char *ezxml_toxml_r(ezxml_t xml, char **s, size_t *len
700      char *txt = (xml->parent) ? xml->parent->txt : "";
701      size_t off = 0;
702  
703 <    // parent character content up to this tag
703 >    /* parent character content up to this tag */
704      *s = ezxml_ampencode(txt + start, xml->off - start, s, len, max, 0);
705  
706 <    while (*len + strlen(xml->name) + 4 > *max) // reallocate s
706 >    while (*len + strlen(xml->name) + 4 > *max) /* reallocate s */
707          *s = realloc(*s, *max += EZXML_BUFSIZE);
708  
709 <    *len += sprintf(*s + *len, "<%s", xml->name); // open tag
710 <    for (i = 0; xml->attr[i]; i += 2) { // tag attributes
709 >    *len += sprintf(*s + *len, "<%s", xml->name); /* open tag */
710 >    for (i = 0; xml->attr[i]; i += 2) { /* tag attributes */
711          if (ezxml_attr(xml, xml->attr[i]) != xml->attr[i + 1]) continue;
712 <        while (*len + strlen(xml->attr[i]) + 7 > *max) // reallocate s
712 >        while (*len + strlen(xml->attr[i]) + 7 > *max) /* reallocate s */
713              *s = realloc(*s, *max += EZXML_BUFSIZE);
714  
715          *len += sprintf(*s + *len, " %s=\"", xml->attr[i]);
# Line 718 | Line 718 | char *ezxml_toxml_r(ezxml_t xml, char **s, size_t *len
718      }
719  
720      for (i = 0; attr[i] && strcmp(attr[i][0], xml->name); i++);
721 <    for (j = 1; attr[i] && attr[i][j]; j += 3) { // default attributes
721 >    for (j = 1; attr[i] && attr[i][j]; j += 3) { /* default attributes */
722          if (! attr[i][j + 1] || ezxml_attr(xml, attr[i][j]) != attr[i][j + 1])
723 <            continue; // skip duplicates and non-values
724 <        while (*len + strlen(attr[i][j]) + 7 > *max) // reallocate s
723 >            continue; /* skip duplicates and non-values */
724 >        while (*len + strlen(attr[i][j]) + 7 > *max) /* reallocate s */
725              *s = realloc(*s, *max += EZXML_BUFSIZE);
726  
727          *len += sprintf(*s + *len, " %s=\"", attr[i][j]);
# Line 730 | Line 730 | char *ezxml_toxml_r(ezxml_t xml, char **s, size_t *len
730      }
731      *len += sprintf(*s + *len, ">");
732  
733 <    *s = (xml->child) ? ezxml_toxml_r(xml->child, s, len, max, 0, attr) //child
734 <                      : ezxml_ampencode(xml->txt, -1, s, len, max, 0);  //data
733 >    *s = (xml->child) ? ezxml_toxml_r(xml->child, s, len, max, 0, attr) /*child */
734 >                      : ezxml_ampencode(xml->txt, -1, s, len, max, 0);  /*data */
735      
736 <    while (*len + strlen(xml->name) + 4 > *max) // reallocate s
736 >    while (*len + strlen(xml->name) + 4 > *max) /* reallocate s */
737          *s = realloc(*s, *max += EZXML_BUFSIZE);
738  
739 <    *len += sprintf(*s + *len, "</%s>", xml->name); // close tag
739 >    *len += sprintf(*s + *len, "</%s>", xml->name); /* close tag */
740  
741 <    while (txt[off] && off < xml->off) off++; // make sure off is within bounds
741 >    while (txt[off] && off < xml->off) off++; /* make sure off is within bounds */
742      return (xml->ordered) ? ezxml_toxml_r(xml->ordered, s, len, max, off, attr)
743                            : ezxml_ampencode(txt + off, -1, s, len, max, 0);
744   }
745  
746 < // Converts an ezxml structure back to xml. Returns a string of xml data that
747 < // must be freed.
746 > /* Converts an ezxml structure back to xml. Returns a string of xml data that */
747 > /* must be freed. */
748   char *ezxml_toxml(ezxml_t xml)
749   {
750      ezxml_t p = (xml) ? xml->parent : NULL, o = (xml) ? xml->ordered : NULL;
# Line 754 | Line 754 | char *ezxml_toxml(ezxml_t xml)
754      int i, j, k;
755  
756      if (! xml || ! xml->name) return realloc(s, len + 1);
757 <    while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; // root tag
757 >    while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; /* root tag */
758  
759 <    for (i = 0; ! p && root->pi[i]; i++) { // pre-root processing instructions
759 >    for (i = 0; ! p && root->pi[i]; i++) { /* pre-root processing instructions */
760          for (k = 2; root->pi[i][k - 1]; k++);
761          for (j = 1; (n = root->pi[i][j]); j++) {
762 <            if (root->pi[i][k][j - 1] == '>') continue; // not pre-root
762 >            if (root->pi[i][k][j - 1] == '>') continue; /* not pre-root */
763              while (len + strlen(t = root->pi[i][0]) + strlen(n) + 7 > max)
764                  s = realloc(s, max += EZXML_BUFSIZE);
765              len += sprintf(s + len, "<?%s%s%s?>\n", t, *n ? " " : "", n);
# Line 771 | Line 771 | char *ezxml_toxml(ezxml_t xml)
771      xml->parent = p;
772      xml->ordered = o;
773  
774 <    for (i = 0; ! p && root->pi[i]; i++) { // post-root processing instructions
774 >    for (i = 0; ! p && root->pi[i]; i++) { /* post-root processing instructions */
775          for (k = 2; root->pi[i][k - 1]; k++);
776          for (j = 1; (n = root->pi[i][j]); j++) {
777 <            if (root->pi[i][k][j - 1] == '<') continue; // not post-root
777 >            if (root->pi[i][k][j - 1] == '<') continue; /* not post-root */
778              while (len + strlen(t = root->pi[i][0]) + strlen(n) + 7 > max)
779                  s = realloc(s, max += EZXML_BUFSIZE);
780              len += sprintf(s + len, "\n<?%s%s%s?>", t, *n ? " " : "", n);
# Line 783 | Line 783 | char *ezxml_toxml(ezxml_t xml)
783      return realloc(s, len + 1);
784   }
785  
786 < // free the memory allocated for the ezxml structure
786 > /* free the memory allocated for the ezxml structure */
787   void ezxml_free(ezxml_t xml)
788   {
789      ezxml_root_t root = (ezxml_root_t)xml;
# Line 794 | Line 794 | void ezxml_free(ezxml_t xml)
794      ezxml_free(xml->child);
795      ezxml_free(xml->ordered);
796  
797 <    if (! xml->parent) { // free root tag allocations
798 <        for (i = 10; root->ent[i]; i += 2) // 0 - 9 are default entites (<>&"')
797 >    if (! xml->parent) { /* free root tag allocations */
798 >        for (i = 10; root->ent[i]; i += 2) /* 0 - 9 are default entites (<>&"') */
799              if ((s = root->ent[i + 1]) < root->s || s > root->e) free(s);
800 <        free(root->ent); // free list of general entities
800 >        free(root->ent); /* free list of general entities */
801  
802          for (i = 0; (a = root->attr[i]); i++) {
803 <            for (j = 1; a[j++]; j += 2) // free malloced attribute values
803 >            for (j = 1; a[j++]; j += 2) /* free malloced attribute values */
804                  if (a[j] && (a[j] < root->s || a[j] > root->e)) free(a[j]);
805              free(a);
806          }
807 <        if (root->attr[0]) free(root->attr); // free default attribute list
807 >        if (root->attr[0]) free(root->attr); /* free default attribute list */
808  
809          for (i = 0; root->pi[i]; i++) {
810              for (j = 1; root->pi[i][j]; j++);
811              free(root->pi[i][j + 1]);
812              free(root->pi[i]);
813          }            
814 <        if (root->pi[0]) free(root->pi); // free processing instructions
814 >        if (root->pi[0]) free(root->pi); /* free processing instructions */
815  
816 <        if (root->len == -1) free(root->m); // malloced xml data
816 >        if (root->len == -1) free(root->m); /* malloced xml data */
817   #ifndef EZXML_NOMMAP
818 <        else if (root->len) munmap(root->m, root->len); // mem mapped xml data
819 < #endif // EZXML_NOMMAP
820 <        if (root->u) free(root->u); // utf8 conversion
818 >        else if (root->len) munmap(root->m, root->len); /* mem mapped xml data */
819 > #endif /* EZXML_NOMMAP */
820 >        if (root->u) free(root->u); /* utf8 conversion */
821      }
822  
823 <    ezxml_free_attr(xml->attr); // tag attributes
824 <    if ((xml->flags & EZXML_TXTM)) free(xml->txt); // character content
825 <    if ((xml->flags & EZXML_NAMEM)) free(xml->name); // tag name
823 >    ezxml_free_attr(xml->attr); /* tag attributes */
824 >    if ((xml->flags & EZXML_TXTM)) free(xml->txt); /* character content */
825 >    if ((xml->flags & EZXML_NAMEM)) free(xml->name); /* tag name */
826      free(xml);
827   }
828  
829 < // return parser error message or empty string if none
829 > /* return parser error message or empty string if none */
830   const char *ezxml_error(ezxml_t xml)
831   {
832 <    while (xml && xml->parent) xml = xml->parent; // find root tag
832 >    while (xml && xml->parent) xml = xml->parent; /* find root tag */
833      return (xml) ? ((ezxml_root_t)xml)->err : "";
834   }
835  
836 < // returns a new empty ezxml structure with the given root tag name
836 > /* returns a new empty ezxml structure with the given root tag name */
837   ezxml_t ezxml_new(const char *name)
838   {
839      static char *ent[] = { "lt;", "&#60;", "gt;", "&#62;", "quot;", "&#34;",
# Line 848 | Line 848 | ezxml_t ezxml_new(const char *name)
848      return &root->xml;
849   }
850  
851 < // inserts an existing tag into an ezxml structure
851 > /* inserts an existing tag into an ezxml structure */
852   ezxml_t ezxml_insert(ezxml_t xml, ezxml_t dest, size_t off)
853   {
854      ezxml_t cur, prev, head;
# Line 857 | Line 857 | ezxml_t ezxml_insert(ezxml_t xml, ezxml_t dest, size_t
857      xml->off = off;
858      xml->parent = dest;
859  
860 <    if ((head = dest->child)) { // already have sub tags
861 <        if (head->off <= off) { // not first subtag
860 >    if ((head = dest->child)) { /* already have sub tags */
861 >        if (head->off <= off) { /* not first subtag */
862              for (cur = head; cur->ordered && cur->ordered->off <= off;
863                   cur = cur->ordered);
864              xml->ordered = cur->ordered;
865              cur->ordered = xml;
866          }
867 <        else { // first subtag
867 >        else { /* first subtag */
868              xml->ordered = head;
869              dest->child = xml;
870          }
871  
872          for (cur = head, prev = NULL; cur && strcmp(cur->name, xml->name);
873 <             prev = cur, cur = cur->sibling); // find tag type
874 <        if (cur && cur->off <= off) { // not first of type
873 >             prev = cur, cur = cur->sibling); /* find tag type */
874 >        if (cur && cur->off <= off) { /* not first of type */
875              while (cur->next && cur->next->off <= off) cur = cur->next;
876              xml->next = cur->next;
877              cur->next = xml;
878          }
879 <        else { // first tag of this type
880 <            if (prev && cur) prev->sibling = cur->sibling; // remove old first
881 <            xml->next = cur; // old first tag is now next
879 >        else { /* first tag of this type */
880 >            if (prev && cur) prev->sibling = cur->sibling; /* remove old first */
881 >            xml->next = cur; /* old first tag is now next */
882              for (cur = head, prev = NULL; cur && cur->off <= off;
883 <                 prev = cur, cur = cur->sibling); // new sibling insert point
883 >                 prev = cur, cur = cur->sibling); /* new sibling insert point */
884              xml->sibling = cur;
885              if (prev) prev->sibling = xml;
886          }
887      }
888 <    else dest->child = xml; // only sub tag
888 >    else dest->child = xml; /* only sub tag */
889  
890      return xml;
891   }
892  
893 < // Adds a child tag. off is the offset of the child tag relative to the start
894 < // of the parent tag's character content. Returns the child tag.
893 > /* Adds a child tag. off is the offset of the child tag relative to the start */
894 > /* of the parent tag's character content. Returns the child tag. */
895   ezxml_t ezxml_add_child(ezxml_t xml, const char *name, size_t off)
896   {
897      ezxml_t child;
# Line 906 | Line 906 | ezxml_t ezxml_add_child(ezxml_t xml, const char *name,
906      return ezxml_insert(child, xml, off);
907   }
908  
909 < // sets the character content for the given tag and returns the tag
909 > /* sets the character content for the given tag and returns the tag */
910   ezxml_t ezxml_set_txt(ezxml_t xml, const char *txt)
911   {
912      if (! xml) return NULL;
913 <    if (xml->flags & EZXML_TXTM) free(xml->txt); // existing txt was malloced
913 >    if (xml->flags & EZXML_TXTM) free(xml->txt); /* existing txt was malloced */
914      xml->flags &= ~EZXML_TXTM;
915      xml->txt = (char *)txt;
916      return xml;
917   }
918  
919 < // Sets the given tag attribute or adds a new attribute if not found. A value
920 < // of NULL will remove the specified attribute. Returns the tag given.
919 > /* Sets the given tag attribute or adds a new attribute if not found. A value */
920 > /* of NULL will remove the specified attribute. Returns the tag given. */
921   ezxml_t ezxml_set_attr(ezxml_t xml, const char *name, const char *value)
922   {
923      int l = 0, c;
924  
925      if (! xml) return NULL;
926      while (xml->attr[l] && strcmp(xml->attr[l], name)) l += 2;
927 <    if (! xml->attr[l]) { // not found, add as new attribute
928 <        if (! value) return xml; // nothing to do
929 <        if (xml->attr == EZXML_NIL) { // first attribute
927 >    if (! xml->attr[l]) { /* not found, add as new attribute */
928 >        if (! value) return xml; /* nothing to do */
929 >        if (xml->attr == EZXML_NIL) { /* first attribute */
930              xml->attr = malloc(4 * sizeof(char *));
931 <            xml->attr[1] = strdup(""); // empty list of malloced names/vals
931 >            xml->attr[1] = strdup(""); /* empty list of malloced names/vals */
932          }
933          else xml->attr = realloc(xml->attr, (l + 4) * sizeof(char *));
934  
935 <        xml->attr[l] = (char *)name; // set attribute name
936 <        xml->attr[l + 2] = NULL; // null terminate attribute list
935 >        xml->attr[l] = (char *)name; /* set attribute name */
936 >        xml->attr[l + 2] = NULL; /* null terminate attribute list */
937          xml->attr[l + 3] = realloc(xml->attr[l + 1],
938                                     (c = strlen(xml->attr[l + 1])) + 2);
939 <        strcpy(xml->attr[l + 3] + c, " "); // set name/value as not malloced
939 >        strcpy(xml->attr[l + 3] + c, " "); /* set name/value as not malloced */
940          if (xml->flags & EZXML_DUP) xml->attr[l + 3][c] = EZXML_NAMEM;
941      }
942 <    else if (xml->flags & EZXML_DUP) free((char *)name); // name was strduped
942 >    else if (xml->flags & EZXML_DUP) free((char *)name); /* name was strduped */
943  
944 <    for (c = l; xml->attr[c]; c += 2); // find end of attribute list
945 <    if (xml->attr[c + 1][l / 2] & EZXML_TXTM) free(xml->attr[l + 1]); //old val
944 >    for (c = l; xml->attr[c]; c += 2); /* find end of attribute list */
945 >    if (xml->attr[c + 1][l / 2] & EZXML_TXTM) free(xml->attr[l + 1]); /*old val */
946      if (xml->flags & EZXML_DUP) xml->attr[c + 1][l / 2] |= EZXML_TXTM;
947      else xml->attr[c + 1][l / 2] &= ~EZXML_TXTM;
948  
949 <    if (value) xml->attr[l + 1] = (char *)value; // set attribute value
950 <    else { // remove attribute
949 >    if (value) xml->attr[l + 1] = (char *)value; /* set attribute value */
950 >    else { /* remove attribute */
951          if (xml->attr[c + 1][l / 2] & EZXML_NAMEM) free(xml->attr[l]);
952          memmove(xml->attr + l, xml->attr + l + 2, (c - l + 2) * sizeof(char*));
953          xml->attr = realloc(xml->attr, (c + 2) * sizeof(char *));
954          memmove(xml->attr[c + 1] + (l / 2), xml->attr[c + 1] + (l / 2) + 1,
955 <                (c / 2) - (l / 2)); // fix list of which name/vals are malloced
955 >                (c / 2) - (l / 2)); /* fix list of which name/vals are malloced */
956      }
957 <    xml->flags &= ~EZXML_DUP; // clear strdup() flag
957 >    xml->flags &= ~EZXML_DUP; /* clear strdup() flag */
958      return xml;
959   }
960  
961 < // sets a flag for the given tag and returns the tag
961 > /* sets a flag for the given tag and returns the tag */
962   ezxml_t ezxml_set_flag(ezxml_t xml, short flag)
963   {
964      if (xml) xml->flags |= flag;
965      return xml;
966   }
967  
968 < // removes a tag along with its subtags without freeing its memory
968 > /* removes a tag along with its subtags without freeing its memory */
969   ezxml_t ezxml_cut(ezxml_t xml)
970   {
971      ezxml_t cur;
972  
973 <    if (! xml) return NULL; // nothing to do
974 <    if (xml->next) xml->next->sibling = xml->sibling; // patch sibling list
973 >    if (! xml) return NULL; /* nothing to do */
974 >    if (xml->next) xml->next->sibling = xml->sibling; /* patch sibling list */
975  
976 <    if (xml->parent) { // not root tag
977 <        cur = xml->parent->child; // find head of subtag list
978 <        if (cur == xml) xml->parent->child = xml->ordered; // first subtag
979 <        else { // not first subtag
976 >    if (xml->parent) { /* not root tag */
977 >        cur = xml->parent->child; /* find head of subtag list */
978 >        if (cur == xml) xml->parent->child = xml->ordered; /* first subtag */
979 >        else { /* not first subtag */
980              while (cur->ordered != xml) cur = cur->ordered;
981 <            cur->ordered = cur->ordered->ordered; // patch ordered list
981 >            cur->ordered = cur->ordered->ordered; /* patch ordered list */
982  
983 <            cur = xml->parent->child; // go back to head of subtag list
984 <            if (strcmp(cur->name, xml->name)) { // not in first sibling list
983 >            cur = xml->parent->child; /* go back to head of subtag list */
984 >            if (strcmp(cur->name, xml->name)) { /* not in first sibling list */
985                  while (strcmp(cur->sibling->name, xml->name))
986                      cur = cur->sibling;
987 <                if (cur->sibling == xml) { // first of a sibling list
987 >                if (cur->sibling == xml) { /* first of a sibling list */
988                      cur->sibling = (xml->next) ? xml->next
989                                                 : cur->sibling->sibling;
990                  }
991 <                else cur = cur->sibling; // not first of a sibling list
991 >                else cur = cur->sibling; /* not first of a sibling list */
992              }
993  
994              while (cur->next && cur->next != xml) cur = cur->next;
995 <            if (cur->next) cur->next = cur->next->next; // patch next list
995 >            if (cur->next) cur->next = cur->next->next; /* patch next list */
996          }        
997      }
998      xml->ordered = xml->sibling = xml->next = NULL;
999      return xml;
1000   }
1001  
1002 < #ifdef EZXML_TEST // test harness
1002 > #ifdef EZXML_TEST /* test harness */
1003   int main(int argc, char **argv)
1004   {
1005      ezxml_t xml;
# Line 1015 | Line 1015 | int main(int argc, char **argv)
1015      ezxml_free(xml);
1016      return (i) ? 1 : 0;
1017   }
1018 < #endif // EZXML_TEST
1018 > #endif /* EZXML_TEST */

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