1 /*
2 * valid.c : part of the code use to do the DTD handling and the validity
3 * checking
4 *
5 * See Copyright for the status of this software.
6 *
7 * daniel@veillard.com
8 */
9
10 #define IN_LIBXML
11 #include "libxml.h"
12
13 #include <string.h>
14
15 #ifdef HAVE_STDLIB_H
16 #include <stdlib.h>
17 #endif
18
19 #include <libxml/xmlmemory.h>
20 #include <libxml/hash.h>
21 #include <libxml/uri.h>
22 #include <libxml/valid.h>
23 #include <libxml/parser.h>
24 #include <libxml/parserInternals.h>
25 #include <libxml/xmlerror.h>
26 #include <libxml/list.h>
27 #include <libxml/globals.h>
28
29 static xmlElementPtr xmlGetDtdElementDesc2(xmlDtdPtr dtd, const xmlChar *name,
30 int create);
31 /* #define DEBUG_VALID_ALGO */
32 /* #define DEBUG_REGEXP_ALGO */
33
34 #define TODO \
35 xmlGenericError(xmlGenericErrorContext, \
36 "Unimplemented block at %s:%d\n", \
37 __FILE__, __LINE__);
38
39 #ifdef LIBXML_VALID_ENABLED
40 static int
41 xmlValidateAttributeValueInternal(xmlDocPtr doc, xmlAttributeType type,
42 const xmlChar *value);
43 #endif
44 /************************************************************************
45 * *
46 * Error handling routines *
47 * *
48 ************************************************************************/
49
50 /**
51 * xmlVErrMemory:
52 * @ctxt: an XML validation parser context
53 * @extra: extra informations
54 *
55 * Handle an out of memory error
56 */
57 static void
xmlVErrMemory(xmlValidCtxtPtr ctxt,const char * extra)58 xmlVErrMemory(xmlValidCtxtPtr ctxt, const char *extra)
59 {
60 xmlGenericErrorFunc channel = NULL;
61 xmlParserCtxtPtr pctxt = NULL;
62 void *data = NULL;
63
64 if (ctxt != NULL) {
65 channel = ctxt->error;
66 data = ctxt->userData;
67 /* Use the special values to detect if it is part of a parsing
68 context */
69 if ((ctxt->finishDtd == XML_CTXT_FINISH_DTD_0) ||
70 (ctxt->finishDtd == XML_CTXT_FINISH_DTD_1)) {
71 long delta = (char *) ctxt - (char *) ctxt->userData;
72 if ((delta > 0) && (delta < 250))
73 pctxt = ctxt->userData;
74 }
75 }
76 if (extra)
77 __xmlRaiseError(NULL, channel, data,
78 pctxt, NULL, XML_FROM_VALID, XML_ERR_NO_MEMORY,
79 XML_ERR_FATAL, NULL, 0, extra, NULL, NULL, 0, 0,
80 "Memory allocation failed : %s\n", extra);
81 else
82 __xmlRaiseError(NULL, channel, data,
83 pctxt, NULL, XML_FROM_VALID, XML_ERR_NO_MEMORY,
84 XML_ERR_FATAL, NULL, 0, NULL, NULL, NULL, 0, 0,
85 "Memory allocation failed\n");
86 }
87
88 /**
89 * xmlErrValid:
90 * @ctxt: an XML validation parser context
91 * @error: the error number
92 * @extra: extra informations
93 *
94 * Handle a validation error
95 */
96 static void LIBXML_ATTR_FORMAT(3,0)
xmlErrValid(xmlValidCtxtPtr ctxt,xmlParserErrors error,const char * msg,const char * extra)97 xmlErrValid(xmlValidCtxtPtr ctxt, xmlParserErrors error,
98 const char *msg, const char *extra)
99 {
100 xmlGenericErrorFunc channel = NULL;
101 xmlParserCtxtPtr pctxt = NULL;
102 void *data = NULL;
103
104 if (ctxt != NULL) {
105 channel = ctxt->error;
106 data = ctxt->userData;
107 /* Use the special values to detect if it is part of a parsing
108 context */
109 if ((ctxt->finishDtd == XML_CTXT_FINISH_DTD_0) ||
110 (ctxt->finishDtd == XML_CTXT_FINISH_DTD_1)) {
111 long delta = (char *) ctxt - (char *) ctxt->userData;
112 if ((delta > 0) && (delta < 250))
113 pctxt = ctxt->userData;
114 }
115 }
116 if (extra)
117 __xmlRaiseError(NULL, channel, data,
118 pctxt, NULL, XML_FROM_VALID, error,
119 XML_ERR_ERROR, NULL, 0, extra, NULL, NULL, 0, 0,
120 msg, extra);
121 else
122 __xmlRaiseError(NULL, channel, data,
123 pctxt, NULL, XML_FROM_VALID, error,
124 XML_ERR_ERROR, NULL, 0, NULL, NULL, NULL, 0, 0,
125 "%s", msg);
126 }
127
128 #if defined(LIBXML_VALID_ENABLED) || defined(LIBXML_SCHEMAS_ENABLED)
129 /**
130 * xmlErrValidNode:
131 * @ctxt: an XML validation parser context
132 * @node: the node raising the error
133 * @error: the error number
134 * @str1: extra informations
135 * @str2: extra informations
136 * @str3: extra informations
137 *
138 * Handle a validation error, provide contextual informations
139 */
140 static void LIBXML_ATTR_FORMAT(4,0)
xmlErrValidNode(xmlValidCtxtPtr ctxt,xmlNodePtr node,xmlParserErrors error,const char * msg,const xmlChar * str1,const xmlChar * str2,const xmlChar * str3)141 xmlErrValidNode(xmlValidCtxtPtr ctxt,
142 xmlNodePtr node, xmlParserErrors error,
143 const char *msg, const xmlChar * str1,
144 const xmlChar * str2, const xmlChar * str3)
145 {
146 xmlStructuredErrorFunc schannel = NULL;
147 xmlGenericErrorFunc channel = NULL;
148 xmlParserCtxtPtr pctxt = NULL;
149 void *data = NULL;
150
151 if (ctxt != NULL) {
152 channel = ctxt->error;
153 data = ctxt->userData;
154 /* Use the special values to detect if it is part of a parsing
155 context */
156 if ((ctxt->finishDtd == XML_CTXT_FINISH_DTD_0) ||
157 (ctxt->finishDtd == XML_CTXT_FINISH_DTD_1)) {
158 long delta = (char *) ctxt - (char *) ctxt->userData;
159 if ((delta > 0) && (delta < 250))
160 pctxt = ctxt->userData;
161 }
162 }
163 __xmlRaiseError(schannel, channel, data, pctxt, node, XML_FROM_VALID, error,
164 XML_ERR_ERROR, NULL, 0,
165 (const char *) str1,
166 (const char *) str2,
167 (const char *) str3, 0, 0, msg, str1, str2, str3);
168 }
169 #endif /* LIBXML_VALID_ENABLED or LIBXML_SCHEMAS_ENABLED */
170
171 #ifdef LIBXML_VALID_ENABLED
172 /**
173 * xmlErrValidNodeNr:
174 * @ctxt: an XML validation parser context
175 * @node: the node raising the error
176 * @error: the error number
177 * @str1: extra informations
178 * @int2: extra informations
179 * @str3: extra informations
180 *
181 * Handle a validation error, provide contextual informations
182 */
183 static void LIBXML_ATTR_FORMAT(4,0)
xmlErrValidNodeNr(xmlValidCtxtPtr ctxt,xmlNodePtr node,xmlParserErrors error,const char * msg,const xmlChar * str1,int int2,const xmlChar * str3)184 xmlErrValidNodeNr(xmlValidCtxtPtr ctxt,
185 xmlNodePtr node, xmlParserErrors error,
186 const char *msg, const xmlChar * str1,
187 int int2, const xmlChar * str3)
188 {
189 xmlStructuredErrorFunc schannel = NULL;
190 xmlGenericErrorFunc channel = NULL;
191 xmlParserCtxtPtr pctxt = NULL;
192 void *data = NULL;
193
194 if (ctxt != NULL) {
195 channel = ctxt->error;
196 data = ctxt->userData;
197 /* Use the special values to detect if it is part of a parsing
198 context */
199 if ((ctxt->finishDtd == XML_CTXT_FINISH_DTD_0) ||
200 (ctxt->finishDtd == XML_CTXT_FINISH_DTD_1)) {
201 long delta = (char *) ctxt - (char *) ctxt->userData;
202 if ((delta > 0) && (delta < 250))
203 pctxt = ctxt->userData;
204 }
205 }
206 __xmlRaiseError(schannel, channel, data, pctxt, node, XML_FROM_VALID, error,
207 XML_ERR_ERROR, NULL, 0,
208 (const char *) str1,
209 (const char *) str3,
210 NULL, int2, 0, msg, str1, int2, str3);
211 }
212
213 /**
214 * xmlErrValidWarning:
215 * @ctxt: an XML validation parser context
216 * @node: the node raising the error
217 * @error: the error number
218 * @str1: extra information
219 * @str2: extra information
220 * @str3: extra information
221 *
222 * Handle a validation error, provide contextual information
223 */
224 static void LIBXML_ATTR_FORMAT(4,0)
xmlErrValidWarning(xmlValidCtxtPtr ctxt,xmlNodePtr node,xmlParserErrors error,const char * msg,const xmlChar * str1,const xmlChar * str2,const xmlChar * str3)225 xmlErrValidWarning(xmlValidCtxtPtr ctxt,
226 xmlNodePtr node, xmlParserErrors error,
227 const char *msg, const xmlChar * str1,
228 const xmlChar * str2, const xmlChar * str3)
229 {
230 xmlStructuredErrorFunc schannel = NULL;
231 xmlGenericErrorFunc channel = NULL;
232 xmlParserCtxtPtr pctxt = NULL;
233 void *data = NULL;
234
235 if (ctxt != NULL) {
236 channel = ctxt->warning;
237 data = ctxt->userData;
238 /* Use the special values to detect if it is part of a parsing
239 context */
240 if ((ctxt->finishDtd == XML_CTXT_FINISH_DTD_0) ||
241 (ctxt->finishDtd == XML_CTXT_FINISH_DTD_1)) {
242 long delta = (char *) ctxt - (char *) ctxt->userData;
243 if ((delta > 0) && (delta < 250))
244 pctxt = ctxt->userData;
245 }
246 }
247 __xmlRaiseError(schannel, channel, data, pctxt, node, XML_FROM_VALID, error,
248 XML_ERR_WARNING, NULL, 0,
249 (const char *) str1,
250 (const char *) str2,
251 (const char *) str3, 0, 0, msg, str1, str2, str3);
252 }
253
254
255
256 #ifdef LIBXML_REGEXP_ENABLED
257 /*
258 * If regexp are enabled we can do continuous validation without the
259 * need of a tree to validate the content model. this is done in each
260 * callbacks.
261 * Each xmlValidState represent the validation state associated to the
262 * set of nodes currently open from the document root to the current element.
263 */
264
265
266 typedef struct _xmlValidState {
267 xmlElementPtr elemDecl; /* pointer to the content model */
268 xmlNodePtr node; /* pointer to the current node */
269 xmlRegExecCtxtPtr exec; /* regexp runtime */
270 } _xmlValidState;
271
272
273 static int
vstateVPush(xmlValidCtxtPtr ctxt,xmlElementPtr elemDecl,xmlNodePtr node)274 vstateVPush(xmlValidCtxtPtr ctxt, xmlElementPtr elemDecl, xmlNodePtr node) {
275 if ((ctxt->vstateMax == 0) || (ctxt->vstateTab == NULL)) {
276 ctxt->vstateMax = 10;
277 ctxt->vstateTab = (xmlValidState *) xmlMalloc(ctxt->vstateMax *
278 sizeof(ctxt->vstateTab[0]));
279 if (ctxt->vstateTab == NULL) {
280 xmlVErrMemory(ctxt, "malloc failed");
281 return(-1);
282 }
283 }
284
285 if (ctxt->vstateNr >= ctxt->vstateMax) {
286 xmlValidState *tmp;
287
288 tmp = (xmlValidState *) xmlRealloc(ctxt->vstateTab,
289 2 * ctxt->vstateMax * sizeof(ctxt->vstateTab[0]));
290 if (tmp == NULL) {
291 xmlVErrMemory(ctxt, "realloc failed");
292 return(-1);
293 }
294 ctxt->vstateMax *= 2;
295 ctxt->vstateTab = tmp;
296 }
297 ctxt->vstate = &ctxt->vstateTab[ctxt->vstateNr];
298 ctxt->vstateTab[ctxt->vstateNr].elemDecl = elemDecl;
299 ctxt->vstateTab[ctxt->vstateNr].node = node;
300 if ((elemDecl != NULL) && (elemDecl->etype == XML_ELEMENT_TYPE_ELEMENT)) {
301 if (elemDecl->contModel == NULL)
302 xmlValidBuildContentModel(ctxt, elemDecl);
303 if (elemDecl->contModel != NULL) {
304 ctxt->vstateTab[ctxt->vstateNr].exec =
305 xmlRegNewExecCtxt(elemDecl->contModel, NULL, NULL);
306 } else {
307 ctxt->vstateTab[ctxt->vstateNr].exec = NULL;
308 xmlErrValidNode(ctxt, (xmlNodePtr) elemDecl,
309 XML_ERR_INTERNAL_ERROR,
310 "Failed to build content model regexp for %s\n",
311 node->name, NULL, NULL);
312 }
313 }
314 return(ctxt->vstateNr++);
315 }
316
317 static int
vstateVPop(xmlValidCtxtPtr ctxt)318 vstateVPop(xmlValidCtxtPtr ctxt) {
319 xmlElementPtr elemDecl;
320
321 if (ctxt->vstateNr < 1) return(-1);
322 ctxt->vstateNr--;
323 elemDecl = ctxt->vstateTab[ctxt->vstateNr].elemDecl;
324 ctxt->vstateTab[ctxt->vstateNr].elemDecl = NULL;
325 ctxt->vstateTab[ctxt->vstateNr].node = NULL;
326 if ((elemDecl != NULL) && (elemDecl->etype == XML_ELEMENT_TYPE_ELEMENT)) {
327 xmlRegFreeExecCtxt(ctxt->vstateTab[ctxt->vstateNr].exec);
328 }
329 ctxt->vstateTab[ctxt->vstateNr].exec = NULL;
330 if (ctxt->vstateNr >= 1)
331 ctxt->vstate = &ctxt->vstateTab[ctxt->vstateNr - 1];
332 else
333 ctxt->vstate = NULL;
334 return(ctxt->vstateNr);
335 }
336
337 #else /* not LIBXML_REGEXP_ENABLED */
338 /*
339 * If regexp are not enabled, it uses a home made algorithm less
340 * complex and easier to
341 * debug/maintain than a generic NFA -> DFA state based algo. The
342 * only restriction is on the deepness of the tree limited by the
343 * size of the occurs bitfield
344 *
345 * this is the content of a saved state for rollbacks
346 */
347
348 #define ROLLBACK_OR 0
349 #define ROLLBACK_PARENT 1
350
351 typedef struct _xmlValidState {
352 xmlElementContentPtr cont; /* pointer to the content model subtree */
353 xmlNodePtr node; /* pointer to the current node in the list */
354 long occurs;/* bitfield for multiple occurrences */
355 unsigned char depth; /* current depth in the overall tree */
356 unsigned char state; /* ROLLBACK_XXX */
357 } _xmlValidState;
358
359 #define MAX_RECURSE 25000
360 #define MAX_DEPTH ((sizeof(_xmlValidState.occurs)) * 8)
361 #define CONT ctxt->vstate->cont
362 #define NODE ctxt->vstate->node
363 #define DEPTH ctxt->vstate->depth
364 #define OCCURS ctxt->vstate->occurs
365 #define STATE ctxt->vstate->state
366
367 #define OCCURRENCE (ctxt->vstate->occurs & (1 << DEPTH))
368 #define PARENT_OCCURRENCE (ctxt->vstate->occurs & ((1 << DEPTH) - 1))
369
370 #define SET_OCCURRENCE ctxt->vstate->occurs |= (1 << DEPTH)
371 #define RESET_OCCURRENCE ctxt->vstate->occurs &= ((1 << DEPTH) - 1)
372
373 static int
vstateVPush(xmlValidCtxtPtr ctxt,xmlElementContentPtr cont,xmlNodePtr node,unsigned char depth,long occurs,unsigned char state)374 vstateVPush(xmlValidCtxtPtr ctxt, xmlElementContentPtr cont,
375 xmlNodePtr node, unsigned char depth, long occurs,
376 unsigned char state) {
377 int i = ctxt->vstateNr - 1;
378
379 if (ctxt->vstateNr > MAX_RECURSE) {
380 return(-1);
381 }
382 if (ctxt->vstateTab == NULL) {
383 ctxt->vstateMax = 8;
384 ctxt->vstateTab = (xmlValidState *) xmlMalloc(
385 ctxt->vstateMax * sizeof(ctxt->vstateTab[0]));
386 if (ctxt->vstateTab == NULL) {
387 xmlVErrMemory(ctxt, "malloc failed");
388 return(-1);
389 }
390 }
391 if (ctxt->vstateNr >= ctxt->vstateMax) {
392 xmlValidState *tmp;
393
394 tmp = (xmlValidState *) xmlRealloc(ctxt->vstateTab,
395 2 * ctxt->vstateMax * sizeof(ctxt->vstateTab[0]));
396 if (tmp == NULL) {
397 xmlVErrMemory(ctxt, "malloc failed");
398 return(-1);
399 }
400 ctxt->vstateMax *= 2;
401 ctxt->vstateTab = tmp;
402 ctxt->vstate = &ctxt->vstateTab[0];
403 }
404 /*
405 * Don't push on the stack a state already here
406 */
407 if ((i >= 0) && (ctxt->vstateTab[i].cont == cont) &&
408 (ctxt->vstateTab[i].node == node) &&
409 (ctxt->vstateTab[i].depth == depth) &&
410 (ctxt->vstateTab[i].occurs == occurs) &&
411 (ctxt->vstateTab[i].state == state))
412 return(ctxt->vstateNr);
413 ctxt->vstateTab[ctxt->vstateNr].cont = cont;
414 ctxt->vstateTab[ctxt->vstateNr].node = node;
415 ctxt->vstateTab[ctxt->vstateNr].depth = depth;
416 ctxt->vstateTab[ctxt->vstateNr].occurs = occurs;
417 ctxt->vstateTab[ctxt->vstateNr].state = state;
418 return(ctxt->vstateNr++);
419 }
420
421 static int
vstateVPop(xmlValidCtxtPtr ctxt)422 vstateVPop(xmlValidCtxtPtr ctxt) {
423 if (ctxt->vstateNr <= 1) return(-1);
424 ctxt->vstateNr--;
425 ctxt->vstate = &ctxt->vstateTab[0];
426 ctxt->vstate->cont = ctxt->vstateTab[ctxt->vstateNr].cont;
427 ctxt->vstate->node = ctxt->vstateTab[ctxt->vstateNr].node;
428 ctxt->vstate->depth = ctxt->vstateTab[ctxt->vstateNr].depth;
429 ctxt->vstate->occurs = ctxt->vstateTab[ctxt->vstateNr].occurs;
430 ctxt->vstate->state = ctxt->vstateTab[ctxt->vstateNr].state;
431 return(ctxt->vstateNr);
432 }
433
434 #endif /* LIBXML_REGEXP_ENABLED */
435
436 static int
nodeVPush(xmlValidCtxtPtr ctxt,xmlNodePtr value)437 nodeVPush(xmlValidCtxtPtr ctxt, xmlNodePtr value)
438 {
439 if (ctxt->nodeMax <= 0) {
440 ctxt->nodeMax = 4;
441 ctxt->nodeTab =
442 (xmlNodePtr *) xmlMalloc(ctxt->nodeMax *
443 sizeof(ctxt->nodeTab[0]));
444 if (ctxt->nodeTab == NULL) {
445 xmlVErrMemory(ctxt, "malloc failed");
446 ctxt->nodeMax = 0;
447 return (0);
448 }
449 }
450 if (ctxt->nodeNr >= ctxt->nodeMax) {
451 xmlNodePtr *tmp;
452 tmp = (xmlNodePtr *) xmlRealloc(ctxt->nodeTab,
453 ctxt->nodeMax * 2 * sizeof(ctxt->nodeTab[0]));
454 if (tmp == NULL) {
455 xmlVErrMemory(ctxt, "realloc failed");
456 return (0);
457 }
458 ctxt->nodeMax *= 2;
459 ctxt->nodeTab = tmp;
460 }
461 ctxt->nodeTab[ctxt->nodeNr] = value;
462 ctxt->node = value;
463 return (ctxt->nodeNr++);
464 }
465 static xmlNodePtr
nodeVPop(xmlValidCtxtPtr ctxt)466 nodeVPop(xmlValidCtxtPtr ctxt)
467 {
468 xmlNodePtr ret;
469
470 if (ctxt->nodeNr <= 0)
471 return (NULL);
472 ctxt->nodeNr--;
473 if (ctxt->nodeNr > 0)
474 ctxt->node = ctxt->nodeTab[ctxt->nodeNr - 1];
475 else
476 ctxt->node = NULL;
477 ret = ctxt->nodeTab[ctxt->nodeNr];
478 ctxt->nodeTab[ctxt->nodeNr] = NULL;
479 return (ret);
480 }
481
482 #ifdef DEBUG_VALID_ALGO
483 static void
xmlValidPrintNode(xmlNodePtr cur)484 xmlValidPrintNode(xmlNodePtr cur) {
485 if (cur == NULL) {
486 xmlGenericError(xmlGenericErrorContext, "null");
487 return;
488 }
489 switch (cur->type) {
490 case XML_ELEMENT_NODE:
491 xmlGenericError(xmlGenericErrorContext, "%s ", cur->name);
492 break;
493 case XML_TEXT_NODE:
494 xmlGenericError(xmlGenericErrorContext, "text ");
495 break;
496 case XML_CDATA_SECTION_NODE:
497 xmlGenericError(xmlGenericErrorContext, "cdata ");
498 break;
499 case XML_ENTITY_REF_NODE:
500 xmlGenericError(xmlGenericErrorContext, "&%s; ", cur->name);
501 break;
502 case XML_PI_NODE:
503 xmlGenericError(xmlGenericErrorContext, "pi(%s) ", cur->name);
504 break;
505 case XML_COMMENT_NODE:
506 xmlGenericError(xmlGenericErrorContext, "comment ");
507 break;
508 case XML_ATTRIBUTE_NODE:
509 xmlGenericError(xmlGenericErrorContext, "?attr? ");
510 break;
511 case XML_ENTITY_NODE:
512 xmlGenericError(xmlGenericErrorContext, "?ent? ");
513 break;
514 case XML_DOCUMENT_NODE:
515 xmlGenericError(xmlGenericErrorContext, "?doc? ");
516 break;
517 case XML_DOCUMENT_TYPE_NODE:
518 xmlGenericError(xmlGenericErrorContext, "?doctype? ");
519 break;
520 case XML_DOCUMENT_FRAG_NODE:
521 xmlGenericError(xmlGenericErrorContext, "?frag? ");
522 break;
523 case XML_NOTATION_NODE:
524 xmlGenericError(xmlGenericErrorContext, "?nota? ");
525 break;
526 case XML_HTML_DOCUMENT_NODE:
527 xmlGenericError(xmlGenericErrorContext, "?html? ");
528 break;
529 #ifdef LIBXML_DOCB_ENABLED
530 case XML_DOCB_DOCUMENT_NODE:
531 xmlGenericError(xmlGenericErrorContext, "?docb? ");
532 break;
533 #endif
534 case XML_DTD_NODE:
535 xmlGenericError(xmlGenericErrorContext, "?dtd? ");
536 break;
537 case XML_ELEMENT_DECL:
538 xmlGenericError(xmlGenericErrorContext, "?edecl? ");
539 break;
540 case XML_ATTRIBUTE_DECL:
541 xmlGenericError(xmlGenericErrorContext, "?adecl? ");
542 break;
543 case XML_ENTITY_DECL:
544 xmlGenericError(xmlGenericErrorContext, "?entdecl? ");
545 break;
546 case XML_NAMESPACE_DECL:
547 xmlGenericError(xmlGenericErrorContext, "?nsdecl? ");
548 break;
549 case XML_XINCLUDE_START:
550 xmlGenericError(xmlGenericErrorContext, "incstart ");
551 break;
552 case XML_XINCLUDE_END:
553 xmlGenericError(xmlGenericErrorContext, "incend ");
554 break;
555 }
556 }
557
558 static void
xmlValidPrintNodeList(xmlNodePtr cur)559 xmlValidPrintNodeList(xmlNodePtr cur) {
560 if (cur == NULL)
561 xmlGenericError(xmlGenericErrorContext, "null ");
562 while (cur != NULL) {
563 xmlValidPrintNode(cur);
564 cur = cur->next;
565 }
566 }
567
568 static void
xmlValidDebug(xmlNodePtr cur,xmlElementContentPtr cont)569 xmlValidDebug(xmlNodePtr cur, xmlElementContentPtr cont) {
570 char expr[5000];
571
572 expr[0] = 0;
573 xmlGenericError(xmlGenericErrorContext, "valid: ");
574 xmlValidPrintNodeList(cur);
575 xmlGenericError(xmlGenericErrorContext, "against ");
576 xmlSnprintfElementContent(expr, 5000, cont, 1);
577 xmlGenericError(xmlGenericErrorContext, "%s\n", expr);
578 }
579
580 static void
xmlValidDebugState(xmlValidStatePtr state)581 xmlValidDebugState(xmlValidStatePtr state) {
582 xmlGenericError(xmlGenericErrorContext, "(");
583 if (state->cont == NULL)
584 xmlGenericError(xmlGenericErrorContext, "null,");
585 else
586 switch (state->cont->type) {
587 case XML_ELEMENT_CONTENT_PCDATA:
588 xmlGenericError(xmlGenericErrorContext, "pcdata,");
589 break;
590 case XML_ELEMENT_CONTENT_ELEMENT:
591 xmlGenericError(xmlGenericErrorContext, "%s,",
592 state->cont->name);
593 break;
594 case XML_ELEMENT_CONTENT_SEQ:
595 xmlGenericError(xmlGenericErrorContext, "seq,");
596 break;
597 case XML_ELEMENT_CONTENT_OR:
598 xmlGenericError(xmlGenericErrorContext, "or,");
599 break;
600 }
601 xmlValidPrintNode(state->node);
602 xmlGenericError(xmlGenericErrorContext, ",%d,%X,%d)",
603 state->depth, state->occurs, state->state);
604 }
605
606 static void
xmlValidStateDebug(xmlValidCtxtPtr ctxt)607 xmlValidStateDebug(xmlValidCtxtPtr ctxt) {
608 int i, j;
609
610 xmlGenericError(xmlGenericErrorContext, "state: ");
611 xmlValidDebugState(ctxt->vstate);
612 xmlGenericError(xmlGenericErrorContext, " stack: %d ",
613 ctxt->vstateNr - 1);
614 for (i = 0, j = ctxt->vstateNr - 1;(i < 3) && (j > 0);i++,j--)
615 xmlValidDebugState(&ctxt->vstateTab[j]);
616 xmlGenericError(xmlGenericErrorContext, "\n");
617 }
618
619 /*****
620 #define DEBUG_VALID_STATE(n,c) xmlValidDebug(n,c);
621 *****/
622
623 #define DEBUG_VALID_STATE(n,c) xmlValidStateDebug(ctxt);
624 #define DEBUG_VALID_MSG(m) \
625 xmlGenericError(xmlGenericErrorContext, "%s\n", m);
626
627 #else
628 #define DEBUG_VALID_STATE(n,c)
629 #define DEBUG_VALID_MSG(m)
630 #endif
631
632 /* TODO: use hash table for accesses to elem and attribute definitions */
633
634
635 #define CHECK_DTD \
636 if (doc == NULL) return(0); \
637 else if ((doc->intSubset == NULL) && \
638 (doc->extSubset == NULL)) return(0)
639
640 #ifdef LIBXML_REGEXP_ENABLED
641
642 /************************************************************************
643 * *
644 * Content model validation based on the regexps *
645 * *
646 ************************************************************************/
647
648 /**
649 * xmlValidBuildAContentModel:
650 * @content: the content model
651 * @ctxt: the schema parser context
652 * @name: the element name whose content is being built
653 *
654 * Generate the automata sequence needed for that type
655 *
656 * Returns 1 if successful or 0 in case of error.
657 */
658 static int
xmlValidBuildAContentModel(xmlElementContentPtr content,xmlValidCtxtPtr ctxt,const xmlChar * name)659 xmlValidBuildAContentModel(xmlElementContentPtr content,
660 xmlValidCtxtPtr ctxt,
661 const xmlChar *name) {
662 if (content == NULL) {
663 xmlErrValidNode(ctxt, NULL, XML_ERR_INTERNAL_ERROR,
664 "Found NULL content in content model of %s\n",
665 name, NULL, NULL);
666 return(0);
667 }
668 switch (content->type) {
669 case XML_ELEMENT_CONTENT_PCDATA:
670 xmlErrValidNode(ctxt, NULL, XML_ERR_INTERNAL_ERROR,
671 "Found PCDATA in content model of %s\n",
672 name, NULL, NULL);
673 return(0);
674 break;
675 case XML_ELEMENT_CONTENT_ELEMENT: {
676 xmlAutomataStatePtr oldstate = ctxt->state;
677 xmlChar fn[50];
678 xmlChar *fullname;
679
680 fullname = xmlBuildQName(content->name, content->prefix, fn, 50);
681 if (fullname == NULL) {
682 xmlVErrMemory(ctxt, "Building content model");
683 return(0);
684 }
685
686 switch (content->ocur) {
687 case XML_ELEMENT_CONTENT_ONCE:
688 ctxt->state = xmlAutomataNewTransition(ctxt->am,
689 ctxt->state, NULL, fullname, NULL);
690 break;
691 case XML_ELEMENT_CONTENT_OPT:
692 ctxt->state = xmlAutomataNewTransition(ctxt->am,
693 ctxt->state, NULL, fullname, NULL);
694 xmlAutomataNewEpsilon(ctxt->am, oldstate, ctxt->state);
695 break;
696 case XML_ELEMENT_CONTENT_PLUS:
697 ctxt->state = xmlAutomataNewTransition(ctxt->am,
698 ctxt->state, NULL, fullname, NULL);
699 xmlAutomataNewTransition(ctxt->am, ctxt->state,
700 ctxt->state, fullname, NULL);
701 break;
702 case XML_ELEMENT_CONTENT_MULT:
703 ctxt->state = xmlAutomataNewEpsilon(ctxt->am,
704 ctxt->state, NULL);
705 xmlAutomataNewTransition(ctxt->am,
706 ctxt->state, ctxt->state, fullname, NULL);
707 break;
708 }
709 if ((fullname != fn) && (fullname != content->name))
710 xmlFree(fullname);
711 break;
712 }
713 case XML_ELEMENT_CONTENT_SEQ: {
714 xmlAutomataStatePtr oldstate, oldend;
715 xmlElementContentOccur ocur;
716
717 /*
718 * Simply iterate over the content
719 */
720 oldstate = ctxt->state;
721 ocur = content->ocur;
722 if (ocur != XML_ELEMENT_CONTENT_ONCE) {
723 ctxt->state = xmlAutomataNewEpsilon(ctxt->am, oldstate, NULL);
724 oldstate = ctxt->state;
725 }
726 do {
727 xmlValidBuildAContentModel(content->c1, ctxt, name);
728 content = content->c2;
729 } while ((content->type == XML_ELEMENT_CONTENT_SEQ) &&
730 (content->ocur == XML_ELEMENT_CONTENT_ONCE));
731 xmlValidBuildAContentModel(content, ctxt, name);
732 oldend = ctxt->state;
733 ctxt->state = xmlAutomataNewEpsilon(ctxt->am, oldend, NULL);
734 switch (ocur) {
735 case XML_ELEMENT_CONTENT_ONCE:
736 break;
737 case XML_ELEMENT_CONTENT_OPT:
738 xmlAutomataNewEpsilon(ctxt->am, oldstate, ctxt->state);
739 break;
740 case XML_ELEMENT_CONTENT_MULT:
741 xmlAutomataNewEpsilon(ctxt->am, oldstate, ctxt->state);
742 xmlAutomataNewEpsilon(ctxt->am, oldend, oldstate);
743 break;
744 case XML_ELEMENT_CONTENT_PLUS:
745 xmlAutomataNewEpsilon(ctxt->am, oldend, oldstate);
746 break;
747 }
748 break;
749 }
750 case XML_ELEMENT_CONTENT_OR: {
751 xmlAutomataStatePtr oldstate, oldend;
752 xmlElementContentOccur ocur;
753
754 ocur = content->ocur;
755 if ((ocur == XML_ELEMENT_CONTENT_PLUS) ||
756 (ocur == XML_ELEMENT_CONTENT_MULT)) {
757 ctxt->state = xmlAutomataNewEpsilon(ctxt->am,
758 ctxt->state, NULL);
759 }
760 oldstate = ctxt->state;
761 oldend = xmlAutomataNewState(ctxt->am);
762
763 /*
764 * iterate over the subtypes and remerge the end with an
765 * epsilon transition
766 */
767 do {
768 ctxt->state = oldstate;
769 xmlValidBuildAContentModel(content->c1, ctxt, name);
770 xmlAutomataNewEpsilon(ctxt->am, ctxt->state, oldend);
771 content = content->c2;
772 } while ((content->type == XML_ELEMENT_CONTENT_OR) &&
773 (content->ocur == XML_ELEMENT_CONTENT_ONCE));
774 ctxt->state = oldstate;
775 xmlValidBuildAContentModel(content, ctxt, name);
776 xmlAutomataNewEpsilon(ctxt->am, ctxt->state, oldend);
777 ctxt->state = xmlAutomataNewEpsilon(ctxt->am, oldend, NULL);
778 switch (ocur) {
779 case XML_ELEMENT_CONTENT_ONCE:
780 break;
781 case XML_ELEMENT_CONTENT_OPT:
782 xmlAutomataNewEpsilon(ctxt->am, oldstate, ctxt->state);
783 break;
784 case XML_ELEMENT_CONTENT_MULT:
785 xmlAutomataNewEpsilon(ctxt->am, oldstate, ctxt->state);
786 xmlAutomataNewEpsilon(ctxt->am, oldend, oldstate);
787 break;
788 case XML_ELEMENT_CONTENT_PLUS:
789 xmlAutomataNewEpsilon(ctxt->am, oldend, oldstate);
790 break;
791 }
792 break;
793 }
794 default:
795 xmlErrValid(ctxt, XML_ERR_INTERNAL_ERROR,
796 "ContentModel broken for element %s\n",
797 (const char *) name);
798 return(0);
799 }
800 return(1);
801 }
802 /**
803 * xmlValidBuildContentModel:
804 * @ctxt: a validation context
805 * @elem: an element declaration node
806 *
807 * (Re)Build the automata associated to the content model of this
808 * element
809 *
810 * Returns 1 in case of success, 0 in case of error
811 */
812 int
xmlValidBuildContentModel(xmlValidCtxtPtr ctxt,xmlElementPtr elem)813 xmlValidBuildContentModel(xmlValidCtxtPtr ctxt, xmlElementPtr elem) {
814
815 if ((ctxt == NULL) || (elem == NULL))
816 return(0);
817 if (elem->type != XML_ELEMENT_DECL)
818 return(0);
819 if (elem->etype != XML_ELEMENT_TYPE_ELEMENT)
820 return(1);
821 /* TODO: should we rebuild in this case ? */
822 if (elem->contModel != NULL) {
823 if (!xmlRegexpIsDeterminist(elem->contModel)) {
824 ctxt->valid = 0;
825 return(0);
826 }
827 return(1);
828 }
829
830 ctxt->am = xmlNewAutomata();
831 if (ctxt->am == NULL) {
832 xmlErrValidNode(ctxt, (xmlNodePtr) elem,
833 XML_ERR_INTERNAL_ERROR,
834 "Cannot create automata for element %s\n",
835 elem->name, NULL, NULL);
836 return(0);
837 }
838 ctxt->state = xmlAutomataGetInitState(ctxt->am);
839 xmlValidBuildAContentModel(elem->content, ctxt, elem->name);
840 xmlAutomataSetFinalState(ctxt->am, ctxt->state);
841 elem->contModel = xmlAutomataCompile(ctxt->am);
842 if (xmlRegexpIsDeterminist(elem->contModel) != 1) {
843 char expr[5000];
844 expr[0] = 0;
845 xmlSnprintfElementContent(expr, 5000, elem->content, 1);
846 xmlErrValidNode(ctxt, (xmlNodePtr) elem,
847 XML_DTD_CONTENT_NOT_DETERMINIST,
848 "Content model of %s is not determinist: %s\n",
849 elem->name, BAD_CAST expr, NULL);
850 #ifdef DEBUG_REGEXP_ALGO
851 xmlRegexpPrint(stderr, elem->contModel);
852 #endif
853 ctxt->valid = 0;
854 ctxt->state = NULL;
855 xmlFreeAutomata(ctxt->am);
856 ctxt->am = NULL;
857 return(0);
858 }
859 ctxt->state = NULL;
860 xmlFreeAutomata(ctxt->am);
861 ctxt->am = NULL;
862 return(1);
863 }
864
865 #endif /* LIBXML_REGEXP_ENABLED */
866
867 /****************************************************************
868 * *
869 * Util functions for data allocation/deallocation *
870 * *
871 ****************************************************************/
872
873 /**
874 * xmlNewValidCtxt:
875 *
876 * Allocate a validation context structure.
877 *
878 * Returns NULL if not, otherwise the new validation context structure
879 */
xmlNewValidCtxt(void)880 xmlValidCtxtPtr xmlNewValidCtxt(void) {
881 xmlValidCtxtPtr ret;
882
883 if ((ret = xmlMalloc(sizeof (xmlValidCtxt))) == NULL) {
884 xmlVErrMemory(NULL, "malloc failed");
885 return (NULL);
886 }
887
888 (void) memset(ret, 0, sizeof (xmlValidCtxt));
889
890 return (ret);
891 }
892
893 /**
894 * xmlFreeValidCtxt:
895 * @cur: the validation context to free
896 *
897 * Free a validation context structure.
898 */
899 void
xmlFreeValidCtxt(xmlValidCtxtPtr cur)900 xmlFreeValidCtxt(xmlValidCtxtPtr cur) {
901 if (cur->vstateTab != NULL)
902 xmlFree(cur->vstateTab);
903 if (cur->nodeTab != NULL)
904 xmlFree(cur->nodeTab);
905 xmlFree(cur);
906 }
907
908 #endif /* LIBXML_VALID_ENABLED */
909
910 /**
911 * xmlNewDocElementContent:
912 * @doc: the document
913 * @name: the subelement name or NULL
914 * @type: the type of element content decl
915 *
916 * Allocate an element content structure for the document.
917 *
918 * Returns NULL if not, otherwise the new element content structure
919 */
920 xmlElementContentPtr
xmlNewDocElementContent(xmlDocPtr doc,const xmlChar * name,xmlElementContentType type)921 xmlNewDocElementContent(xmlDocPtr doc, const xmlChar *name,
922 xmlElementContentType type) {
923 xmlElementContentPtr ret;
924 xmlDictPtr dict = NULL;
925
926 if (doc != NULL)
927 dict = doc->dict;
928
929 switch(type) {
930 case XML_ELEMENT_CONTENT_ELEMENT:
931 if (name == NULL) {
932 xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
933 "xmlNewElementContent : name == NULL !\n",
934 NULL);
935 }
936 break;
937 case XML_ELEMENT_CONTENT_PCDATA:
938 case XML_ELEMENT_CONTENT_SEQ:
939 case XML_ELEMENT_CONTENT_OR:
940 if (name != NULL) {
941 xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
942 "xmlNewElementContent : name != NULL !\n",
943 NULL);
944 }
945 break;
946 default:
947 xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
948 "Internal: ELEMENT content corrupted invalid type\n",
949 NULL);
950 return(NULL);
951 }
952 ret = (xmlElementContentPtr) xmlMalloc(sizeof(xmlElementContent));
953 if (ret == NULL) {
954 xmlVErrMemory(NULL, "malloc failed");
955 return(NULL);
956 }
957 memset(ret, 0, sizeof(xmlElementContent));
958 ret->type = type;
959 ret->ocur = XML_ELEMENT_CONTENT_ONCE;
960 if (name != NULL) {
961 int l;
962 const xmlChar *tmp;
963
964 tmp = xmlSplitQName3(name, &l);
965 if (tmp == NULL) {
966 if (dict == NULL)
967 ret->name = xmlStrdup(name);
968 else
969 ret->name = xmlDictLookup(dict, name, -1);
970 } else {
971 if (dict == NULL) {
972 ret->prefix = xmlStrndup(name, l);
973 ret->name = xmlStrdup(tmp);
974 } else {
975 ret->prefix = xmlDictLookup(dict, name, l);
976 ret->name = xmlDictLookup(dict, tmp, -1);
977 }
978 }
979 }
980 return(ret);
981 }
982
983 /**
984 * xmlNewElementContent:
985 * @name: the subelement name or NULL
986 * @type: the type of element content decl
987 *
988 * Allocate an element content structure.
989 * Deprecated in favor of xmlNewDocElementContent
990 *
991 * Returns NULL if not, otherwise the new element content structure
992 */
993 xmlElementContentPtr
xmlNewElementContent(const xmlChar * name,xmlElementContentType type)994 xmlNewElementContent(const xmlChar *name, xmlElementContentType type) {
995 return(xmlNewDocElementContent(NULL, name, type));
996 }
997
998 /**
999 * xmlCopyDocElementContent:
1000 * @doc: the document owning the element declaration
1001 * @cur: An element content pointer.
1002 *
1003 * Build a copy of an element content description.
1004 *
1005 * Returns the new xmlElementContentPtr or NULL in case of error.
1006 */
1007 xmlElementContentPtr
xmlCopyDocElementContent(xmlDocPtr doc,xmlElementContentPtr cur)1008 xmlCopyDocElementContent(xmlDocPtr doc, xmlElementContentPtr cur) {
1009 xmlElementContentPtr ret = NULL, prev = NULL, tmp;
1010 xmlDictPtr dict = NULL;
1011
1012 if (cur == NULL) return(NULL);
1013
1014 if (doc != NULL)
1015 dict = doc->dict;
1016
1017 ret = (xmlElementContentPtr) xmlMalloc(sizeof(xmlElementContent));
1018 if (ret == NULL) {
1019 xmlVErrMemory(NULL, "malloc failed");
1020 return(NULL);
1021 }
1022 memset(ret, 0, sizeof(xmlElementContent));
1023 ret->type = cur->type;
1024 ret->ocur = cur->ocur;
1025 if (cur->name != NULL) {
1026 if (dict)
1027 ret->name = xmlDictLookup(dict, cur->name, -1);
1028 else
1029 ret->name = xmlStrdup(cur->name);
1030 }
1031
1032 if (cur->prefix != NULL) {
1033 if (dict)
1034 ret->prefix = xmlDictLookup(dict, cur->prefix, -1);
1035 else
1036 ret->prefix = xmlStrdup(cur->prefix);
1037 }
1038 if (cur->c1 != NULL)
1039 ret->c1 = xmlCopyDocElementContent(doc, cur->c1);
1040 if (ret->c1 != NULL)
1041 ret->c1->parent = ret;
1042 if (cur->c2 != NULL) {
1043 prev = ret;
1044 cur = cur->c2;
1045 while (cur != NULL) {
1046 tmp = (xmlElementContentPtr) xmlMalloc(sizeof(xmlElementContent));
1047 if (tmp == NULL) {
1048 xmlVErrMemory(NULL, "malloc failed");
1049 return(ret);
1050 }
1051 memset(tmp, 0, sizeof(xmlElementContent));
1052 tmp->type = cur->type;
1053 tmp->ocur = cur->ocur;
1054 prev->c2 = tmp;
1055 if (cur->name != NULL) {
1056 if (dict)
1057 tmp->name = xmlDictLookup(dict, cur->name, -1);
1058 else
1059 tmp->name = xmlStrdup(cur->name);
1060 }
1061
1062 if (cur->prefix != NULL) {
1063 if (dict)
1064 tmp->prefix = xmlDictLookup(dict, cur->prefix, -1);
1065 else
1066 tmp->prefix = xmlStrdup(cur->prefix);
1067 }
1068 if (cur->c1 != NULL)
1069 tmp->c1 = xmlCopyDocElementContent(doc,cur->c1);
1070 if (tmp->c1 != NULL)
1071 tmp->c1->parent = ret;
1072 prev = tmp;
1073 cur = cur->c2;
1074 }
1075 }
1076 return(ret);
1077 }
1078
1079 /**
1080 * xmlCopyElementContent:
1081 * @cur: An element content pointer.
1082 *
1083 * Build a copy of an element content description.
1084 * Deprecated, use xmlCopyDocElementContent instead
1085 *
1086 * Returns the new xmlElementContentPtr or NULL in case of error.
1087 */
1088 xmlElementContentPtr
xmlCopyElementContent(xmlElementContentPtr cur)1089 xmlCopyElementContent(xmlElementContentPtr cur) {
1090 return(xmlCopyDocElementContent(NULL, cur));
1091 }
1092
1093 /**
1094 * xmlFreeDocElementContent:
1095 * @doc: the document owning the element declaration
1096 * @cur: the element content tree to free
1097 *
1098 * Free an element content structure. The whole subtree is removed.
1099 */
1100 void
xmlFreeDocElementContent(xmlDocPtr doc,xmlElementContentPtr cur)1101 xmlFreeDocElementContent(xmlDocPtr doc, xmlElementContentPtr cur) {
1102 xmlElementContentPtr next;
1103 xmlDictPtr dict = NULL;
1104
1105 if (doc != NULL)
1106 dict = doc->dict;
1107
1108 while (cur != NULL) {
1109 next = cur->c2;
1110 switch (cur->type) {
1111 case XML_ELEMENT_CONTENT_PCDATA:
1112 case XML_ELEMENT_CONTENT_ELEMENT:
1113 case XML_ELEMENT_CONTENT_SEQ:
1114 case XML_ELEMENT_CONTENT_OR:
1115 break;
1116 default:
1117 xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
1118 "Internal: ELEMENT content corrupted invalid type\n",
1119 NULL);
1120 return;
1121 }
1122 if (cur->c1 != NULL) xmlFreeDocElementContent(doc, cur->c1);
1123 if (dict) {
1124 if ((cur->name != NULL) && (!xmlDictOwns(dict, cur->name)))
1125 xmlFree((xmlChar *) cur->name);
1126 if ((cur->prefix != NULL) && (!xmlDictOwns(dict, cur->prefix)))
1127 xmlFree((xmlChar *) cur->prefix);
1128 } else {
1129 if (cur->name != NULL) xmlFree((xmlChar *) cur->name);
1130 if (cur->prefix != NULL) xmlFree((xmlChar *) cur->prefix);
1131 }
1132 xmlFree(cur);
1133 cur = next;
1134 }
1135 }
1136
1137 /**
1138 * xmlFreeElementContent:
1139 * @cur: the element content tree to free
1140 *
1141 * Free an element content structure. The whole subtree is removed.
1142 * Deprecated, use xmlFreeDocElementContent instead
1143 */
1144 void
xmlFreeElementContent(xmlElementContentPtr cur)1145 xmlFreeElementContent(xmlElementContentPtr cur) {
1146 xmlFreeDocElementContent(NULL, cur);
1147 }
1148
1149 #ifdef LIBXML_OUTPUT_ENABLED
1150 /**
1151 * xmlDumpElementContent:
1152 * @buf: An XML buffer
1153 * @content: An element table
1154 * @glob: 1 if one must print the englobing parenthesis, 0 otherwise
1155 *
1156 * This will dump the content of the element table as an XML DTD definition
1157 */
1158 static void
xmlDumpElementContent(xmlBufferPtr buf,xmlElementContentPtr content,int glob)1159 xmlDumpElementContent(xmlBufferPtr buf, xmlElementContentPtr content, int glob) {
1160 if (content == NULL) return;
1161
1162 if (glob) xmlBufferWriteChar(buf, "(");
1163 switch (content->type) {
1164 case XML_ELEMENT_CONTENT_PCDATA:
1165 xmlBufferWriteChar(buf, "#PCDATA");
1166 break;
1167 case XML_ELEMENT_CONTENT_ELEMENT:
1168 if (content->prefix != NULL) {
1169 xmlBufferWriteCHAR(buf, content->prefix);
1170 xmlBufferWriteChar(buf, ":");
1171 }
1172 xmlBufferWriteCHAR(buf, content->name);
1173 break;
1174 case XML_ELEMENT_CONTENT_SEQ:
1175 if ((content->c1 != NULL) &&
1176 ((content->c1->type == XML_ELEMENT_CONTENT_OR) ||
1177 (content->c1->type == XML_ELEMENT_CONTENT_SEQ)))
1178 xmlDumpElementContent(buf, content->c1, 1);
1179 else
1180 xmlDumpElementContent(buf, content->c1, 0);
1181 xmlBufferWriteChar(buf, " , ");
1182 if ((content->c2 != NULL) &&
1183 ((content->c2->type == XML_ELEMENT_CONTENT_OR) ||
1184 ((content->c2->type == XML_ELEMENT_CONTENT_SEQ) &&
1185 (content->c2->ocur != XML_ELEMENT_CONTENT_ONCE))))
1186 xmlDumpElementContent(buf, content->c2, 1);
1187 else
1188 xmlDumpElementContent(buf, content->c2, 0);
1189 break;
1190 case XML_ELEMENT_CONTENT_OR:
1191 if ((content->c1 != NULL) &&
1192 ((content->c1->type == XML_ELEMENT_CONTENT_OR) ||
1193 (content->c1->type == XML_ELEMENT_CONTENT_SEQ)))
1194 xmlDumpElementContent(buf, content->c1, 1);
1195 else
1196 xmlDumpElementContent(buf, content->c1, 0);
1197 xmlBufferWriteChar(buf, " | ");
1198 if ((content->c2 != NULL) &&
1199 ((content->c2->type == XML_ELEMENT_CONTENT_SEQ) ||
1200 ((content->c2->type == XML_ELEMENT_CONTENT_OR) &&
1201 (content->c2->ocur != XML_ELEMENT_CONTENT_ONCE))))
1202 xmlDumpElementContent(buf, content->c2, 1);
1203 else
1204 xmlDumpElementContent(buf, content->c2, 0);
1205 break;
1206 default:
1207 xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
1208 "Internal: ELEMENT content corrupted invalid type\n",
1209 NULL);
1210 }
1211 if (glob)
1212 xmlBufferWriteChar(buf, ")");
1213 switch (content->ocur) {
1214 case XML_ELEMENT_CONTENT_ONCE:
1215 break;
1216 case XML_ELEMENT_CONTENT_OPT:
1217 xmlBufferWriteChar(buf, "?");
1218 break;
1219 case XML_ELEMENT_CONTENT_MULT:
1220 xmlBufferWriteChar(buf, "*");
1221 break;
1222 case XML_ELEMENT_CONTENT_PLUS:
1223 xmlBufferWriteChar(buf, "+");
1224 break;
1225 }
1226 }
1227
1228 /**
1229 * xmlSprintfElementContent:
1230 * @buf: an output buffer
1231 * @content: An element table
1232 * @englob: 1 if one must print the englobing parenthesis, 0 otherwise
1233 *
1234 * Deprecated, unsafe, use xmlSnprintfElementContent
1235 */
1236 void
xmlSprintfElementContent(char * buf ATTRIBUTE_UNUSED,xmlElementContentPtr content ATTRIBUTE_UNUSED,int englob ATTRIBUTE_UNUSED)1237 xmlSprintfElementContent(char *buf ATTRIBUTE_UNUSED,
1238 xmlElementContentPtr content ATTRIBUTE_UNUSED,
1239 int englob ATTRIBUTE_UNUSED) {
1240 }
1241 #endif /* LIBXML_OUTPUT_ENABLED */
1242
1243 /**
1244 * xmlSnprintfElementContent:
1245 * @buf: an output buffer
1246 * @size: the buffer size
1247 * @content: An element table
1248 * @englob: 1 if one must print the englobing parenthesis, 0 otherwise
1249 *
1250 * This will dump the content of the element content definition
1251 * Intended just for the debug routine
1252 */
1253 void
xmlSnprintfElementContent(char * buf,int size,xmlElementContentPtr content,int englob)1254 xmlSnprintfElementContent(char *buf, int size, xmlElementContentPtr content, int englob) {
1255 int len;
1256
1257 if (content == NULL) return;
1258 len = strlen(buf);
1259 if (size - len < 50) {
1260 if ((size - len > 4) && (buf[len - 1] != '.'))
1261 strcat(buf, " ...");
1262 return;
1263 }
1264 if (englob) strcat(buf, "(");
1265 switch (content->type) {
1266 case XML_ELEMENT_CONTENT_PCDATA:
1267 strcat(buf, "#PCDATA");
1268 break;
1269 case XML_ELEMENT_CONTENT_ELEMENT: {
1270 int qnameLen = xmlStrlen(content->name);
1271
1272 if (content->prefix != NULL)
1273 qnameLen += xmlStrlen(content->prefix) + 1;
1274 if (size - len < qnameLen + 10) {
1275 strcat(buf, " ...");
1276 return;
1277 }
1278 if (content->prefix != NULL) {
1279 strcat(buf, (char *) content->prefix);
1280 strcat(buf, ":");
1281 }
1282 if (content->name != NULL)
1283 strcat(buf, (char *) content->name);
1284 break;
1285 }
1286 case XML_ELEMENT_CONTENT_SEQ:
1287 if ((content->c1->type == XML_ELEMENT_CONTENT_OR) ||
1288 (content->c1->type == XML_ELEMENT_CONTENT_SEQ))
1289 xmlSnprintfElementContent(buf, size, content->c1, 1);
1290 else
1291 xmlSnprintfElementContent(buf, size, content->c1, 0);
1292 len = strlen(buf);
1293 if (size - len < 50) {
1294 if ((size - len > 4) && (buf[len - 1] != '.'))
1295 strcat(buf, " ...");
1296 return;
1297 }
1298 strcat(buf, " , ");
1299 if (((content->c2->type == XML_ELEMENT_CONTENT_OR) ||
1300 (content->c2->ocur != XML_ELEMENT_CONTENT_ONCE)) &&
1301 (content->c2->type != XML_ELEMENT_CONTENT_ELEMENT))
1302 xmlSnprintfElementContent(buf, size, content->c2, 1);
1303 else
1304 xmlSnprintfElementContent(buf, size, content->c2, 0);
1305 break;
1306 case XML_ELEMENT_CONTENT_OR:
1307 if ((content->c1->type == XML_ELEMENT_CONTENT_OR) ||
1308 (content->c1->type == XML_ELEMENT_CONTENT_SEQ))
1309 xmlSnprintfElementContent(buf, size, content->c1, 1);
1310 else
1311 xmlSnprintfElementContent(buf, size, content->c1, 0);
1312 len = strlen(buf);
1313 if (size - len < 50) {
1314 if ((size - len > 4) && (buf[len - 1] != '.'))
1315 strcat(buf, " ...");
1316 return;
1317 }
1318 strcat(buf, " | ");
1319 if (((content->c2->type == XML_ELEMENT_CONTENT_SEQ) ||
1320 (content->c2->ocur != XML_ELEMENT_CONTENT_ONCE)) &&
1321 (content->c2->type != XML_ELEMENT_CONTENT_ELEMENT))
1322 xmlSnprintfElementContent(buf, size, content->c2, 1);
1323 else
1324 xmlSnprintfElementContent(buf, size, content->c2, 0);
1325 break;
1326 }
1327 if (size - strlen(buf) <= 2) return;
1328 if (englob)
1329 strcat(buf, ")");
1330 switch (content->ocur) {
1331 case XML_ELEMENT_CONTENT_ONCE:
1332 break;
1333 case XML_ELEMENT_CONTENT_OPT:
1334 strcat(buf, "?");
1335 break;
1336 case XML_ELEMENT_CONTENT_MULT:
1337 strcat(buf, "*");
1338 break;
1339 case XML_ELEMENT_CONTENT_PLUS:
1340 strcat(buf, "+");
1341 break;
1342 }
1343 }
1344
1345 /****************************************************************
1346 * *
1347 * Registration of DTD declarations *
1348 * *
1349 ****************************************************************/
1350
1351 /**
1352 * xmlFreeElement:
1353 * @elem: An element
1354 *
1355 * Deallocate the memory used by an element definition
1356 */
1357 static void
xmlFreeElement(xmlElementPtr elem)1358 xmlFreeElement(xmlElementPtr elem) {
1359 if (elem == NULL) return;
1360 xmlUnlinkNode((xmlNodePtr) elem);
1361 xmlFreeDocElementContent(elem->doc, elem->content);
1362 if (elem->name != NULL)
1363 xmlFree((xmlChar *) elem->name);
1364 if (elem->prefix != NULL)
1365 xmlFree((xmlChar *) elem->prefix);
1366 #ifdef LIBXML_REGEXP_ENABLED
1367 if (elem->contModel != NULL)
1368 xmlRegFreeRegexp(elem->contModel);
1369 #endif
1370 xmlFree(elem);
1371 }
1372
1373
1374 /**
1375 * xmlAddElementDecl:
1376 * @ctxt: the validation context
1377 * @dtd: pointer to the DTD
1378 * @name: the entity name
1379 * @type: the element type
1380 * @content: the element content tree or NULL
1381 *
1382 * Register a new element declaration
1383 *
1384 * Returns NULL if not, otherwise the entity
1385 */
1386 xmlElementPtr
xmlAddElementDecl(xmlValidCtxtPtr ctxt,xmlDtdPtr dtd,const xmlChar * name,xmlElementTypeVal type,xmlElementContentPtr content)1387 xmlAddElementDecl(xmlValidCtxtPtr ctxt,
1388 xmlDtdPtr dtd, const xmlChar *name,
1389 xmlElementTypeVal type,
1390 xmlElementContentPtr content) {
1391 xmlElementPtr ret;
1392 xmlElementTablePtr table;
1393 xmlAttributePtr oldAttributes = NULL;
1394 xmlChar *ns, *uqname;
1395
1396 if (dtd == NULL) {
1397 return(NULL);
1398 }
1399 if (name == NULL) {
1400 return(NULL);
1401 }
1402
1403 switch (type) {
1404 case XML_ELEMENT_TYPE_EMPTY:
1405 if (content != NULL) {
1406 xmlErrValid(ctxt, XML_ERR_INTERNAL_ERROR,
1407 "xmlAddElementDecl: content != NULL for EMPTY\n",
1408 NULL);
1409 return(NULL);
1410 }
1411 break;
1412 case XML_ELEMENT_TYPE_ANY:
1413 if (content != NULL) {
1414 xmlErrValid(ctxt, XML_ERR_INTERNAL_ERROR,
1415 "xmlAddElementDecl: content != NULL for ANY\n",
1416 NULL);
1417 return(NULL);
1418 }
1419 break;
1420 case XML_ELEMENT_TYPE_MIXED:
1421 if (content == NULL) {
1422 xmlErrValid(ctxt, XML_ERR_INTERNAL_ERROR,
1423 "xmlAddElementDecl: content == NULL for MIXED\n",
1424 NULL);
1425 return(NULL);
1426 }
1427 break;
1428 case XML_ELEMENT_TYPE_ELEMENT:
1429 if (content == NULL) {
1430 xmlErrValid(ctxt, XML_ERR_INTERNAL_ERROR,
1431 "xmlAddElementDecl: content == NULL for ELEMENT\n",
1432 NULL);
1433 return(NULL);
1434 }
1435 break;
1436 default:
1437 xmlErrValid(ctxt, XML_ERR_INTERNAL_ERROR,
1438 "Internal: ELEMENT decl corrupted invalid type\n",
1439 NULL);
1440 return(NULL);
1441 }
1442
1443 /*
1444 * check if name is a QName
1445 */
1446 uqname = xmlSplitQName2(name, &ns);
1447 if (uqname != NULL)
1448 name = uqname;
1449
1450 /*
1451 * Create the Element table if needed.
1452 */
1453 table = (xmlElementTablePtr) dtd->elements;
1454 if (table == NULL) {
1455 xmlDictPtr dict = NULL;
1456
1457 if (dtd->doc != NULL)
1458 dict = dtd->doc->dict;
1459 table = xmlHashCreateDict(0, dict);
1460 dtd->elements = (void *) table;
1461 }
1462 if (table == NULL) {
1463 xmlVErrMemory(ctxt,
1464 "xmlAddElementDecl: Table creation failed!\n");
1465 if (uqname != NULL)
1466 xmlFree(uqname);
1467 if (ns != NULL)
1468 xmlFree(ns);
1469 return(NULL);
1470 }
1471
1472 /*
1473 * lookup old attributes inserted on an undefined element in the
1474 * internal subset.
1475 */
1476 if ((dtd->doc != NULL) && (dtd->doc->intSubset != NULL)) {
1477 ret = xmlHashLookup2(dtd->doc->intSubset->elements, name, ns);
1478 if ((ret != NULL) && (ret->etype == XML_ELEMENT_TYPE_UNDEFINED)) {
1479 oldAttributes = ret->attributes;
1480 ret->attributes = NULL;
1481 xmlHashRemoveEntry2(dtd->doc->intSubset->elements, name, ns, NULL);
1482 xmlFreeElement(ret);
1483 }
1484 }
1485
1486 /*
1487 * The element may already be present if one of its attribute
1488 * was registered first
1489 */
1490 ret = xmlHashLookup2(table, name, ns);
1491 if (ret != NULL) {
1492 if (ret->etype != XML_ELEMENT_TYPE_UNDEFINED) {
1493 #ifdef LIBXML_VALID_ENABLED
1494 /*
1495 * The element is already defined in this DTD.
1496 */
1497 xmlErrValidNode(ctxt, (xmlNodePtr) dtd, XML_DTD_ELEM_REDEFINED,
1498 "Redefinition of element %s\n",
1499 name, NULL, NULL);
1500 #endif /* LIBXML_VALID_ENABLED */
1501 if (uqname != NULL)
1502 xmlFree(uqname);
1503 if (ns != NULL)
1504 xmlFree(ns);
1505 return(NULL);
1506 }
1507 if (ns != NULL) {
1508 xmlFree(ns);
1509 ns = NULL;
1510 }
1511 } else {
1512 ret = (xmlElementPtr) xmlMalloc(sizeof(xmlElement));
1513 if (ret == NULL) {
1514 xmlVErrMemory(ctxt, "malloc failed");
1515 if (uqname != NULL)
1516 xmlFree(uqname);
1517 if (ns != NULL)
1518 xmlFree(ns);
1519 return(NULL);
1520 }
1521 memset(ret, 0, sizeof(xmlElement));
1522 ret->type = XML_ELEMENT_DECL;
1523
1524 /*
1525 * fill the structure.
1526 */
1527 ret->name = xmlStrdup(name);
1528 if (ret->name == NULL) {
1529 xmlVErrMemory(ctxt, "malloc failed");
1530 if (uqname != NULL)
1531 xmlFree(uqname);
1532 if (ns != NULL)
1533 xmlFree(ns);
1534 xmlFree(ret);
1535 return(NULL);
1536 }
1537 ret->prefix = ns;
1538
1539 /*
1540 * Validity Check:
1541 * Insertion must not fail
1542 */
1543 if (xmlHashAddEntry2(table, name, ns, ret)) {
1544 #ifdef LIBXML_VALID_ENABLED
1545 /*
1546 * The element is already defined in this DTD.
1547 */
1548 xmlErrValidNode(ctxt, (xmlNodePtr) dtd, XML_DTD_ELEM_REDEFINED,
1549 "Redefinition of element %s\n",
1550 name, NULL, NULL);
1551 #endif /* LIBXML_VALID_ENABLED */
1552 xmlFreeElement(ret);
1553 if (uqname != NULL)
1554 xmlFree(uqname);
1555 return(NULL);
1556 }
1557 /*
1558 * For new element, may have attributes from earlier
1559 * definition in internal subset
1560 */
1561 ret->attributes = oldAttributes;
1562 }
1563
1564 /*
1565 * Finish to fill the structure.
1566 */
1567 ret->etype = type;
1568 /*
1569 * Avoid a stupid copy when called by the parser
1570 * and flag it by setting a special parent value
1571 * so the parser doesn't unallocate it.
1572 */
1573 if ((ctxt != NULL) &&
1574 ((ctxt->finishDtd == XML_CTXT_FINISH_DTD_0) ||
1575 (ctxt->finishDtd == XML_CTXT_FINISH_DTD_1))) {
1576 ret->content = content;
1577 if (content != NULL)
1578 content->parent = (xmlElementContentPtr) 1;
1579 } else {
1580 ret->content = xmlCopyDocElementContent(dtd->doc, content);
1581 }
1582
1583 /*
1584 * Link it to the DTD
1585 */
1586 ret->parent = dtd;
1587 ret->doc = dtd->doc;
1588 if (dtd->last == NULL) {
1589 dtd->children = dtd->last = (xmlNodePtr) ret;
1590 } else {
1591 dtd->last->next = (xmlNodePtr) ret;
1592 ret->prev = dtd->last;
1593 dtd->last = (xmlNodePtr) ret;
1594 }
1595 if (uqname != NULL)
1596 xmlFree(uqname);
1597 return(ret);
1598 }
1599
1600 static void
xmlFreeElementTableEntry(void * elem,const xmlChar * name ATTRIBUTE_UNUSED)1601 xmlFreeElementTableEntry(void *elem, const xmlChar *name ATTRIBUTE_UNUSED) {
1602 xmlFreeElement((xmlElementPtr) elem);
1603 }
1604
1605 /**
1606 * xmlFreeElementTable:
1607 * @table: An element table
1608 *
1609 * Deallocate the memory used by an element hash table.
1610 */
1611 void
xmlFreeElementTable(xmlElementTablePtr table)1612 xmlFreeElementTable(xmlElementTablePtr table) {
1613 xmlHashFree(table, xmlFreeElementTableEntry);
1614 }
1615
1616 #ifdef LIBXML_TREE_ENABLED
1617 /**
1618 * xmlCopyElement:
1619 * @elem: An element
1620 *
1621 * Build a copy of an element.
1622 *
1623 * Returns the new xmlElementPtr or NULL in case of error.
1624 */
1625 static void *
xmlCopyElement(void * payload,const xmlChar * name ATTRIBUTE_UNUSED)1626 xmlCopyElement(void *payload, const xmlChar *name ATTRIBUTE_UNUSED) {
1627 xmlElementPtr elem = (xmlElementPtr) payload;
1628 xmlElementPtr cur;
1629
1630 cur = (xmlElementPtr) xmlMalloc(sizeof(xmlElement));
1631 if (cur == NULL) {
1632 xmlVErrMemory(NULL, "malloc failed");
1633 return(NULL);
1634 }
1635 memset(cur, 0, sizeof(xmlElement));
1636 cur->type = XML_ELEMENT_DECL;
1637 cur->etype = elem->etype;
1638 if (elem->name != NULL)
1639 cur->name = xmlStrdup(elem->name);
1640 else
1641 cur->name = NULL;
1642 if (elem->prefix != NULL)
1643 cur->prefix = xmlStrdup(elem->prefix);
1644 else
1645 cur->prefix = NULL;
1646 cur->content = xmlCopyElementContent(elem->content);
1647 /* TODO : rebuild the attribute list on the copy */
1648 cur->attributes = NULL;
1649 return(cur);
1650 }
1651
1652 /**
1653 * xmlCopyElementTable:
1654 * @table: An element table
1655 *
1656 * Build a copy of an element table.
1657 *
1658 * Returns the new xmlElementTablePtr or NULL in case of error.
1659 */
1660 xmlElementTablePtr
xmlCopyElementTable(xmlElementTablePtr table)1661 xmlCopyElementTable(xmlElementTablePtr table) {
1662 return((xmlElementTablePtr) xmlHashCopy(table, xmlCopyElement));
1663 }
1664 #endif /* LIBXML_TREE_ENABLED */
1665
1666 #ifdef LIBXML_OUTPUT_ENABLED
1667 /**
1668 * xmlDumpElementDecl:
1669 * @buf: the XML buffer output
1670 * @elem: An element table
1671 *
1672 * This will dump the content of the element declaration as an XML
1673 * DTD definition
1674 */
1675 void
xmlDumpElementDecl(xmlBufferPtr buf,xmlElementPtr elem)1676 xmlDumpElementDecl(xmlBufferPtr buf, xmlElementPtr elem) {
1677 if ((buf == NULL) || (elem == NULL))
1678 return;
1679 switch (elem->etype) {
1680 case XML_ELEMENT_TYPE_EMPTY:
1681 xmlBufferWriteChar(buf, "<!ELEMENT ");
1682 if (elem->prefix != NULL) {
1683 xmlBufferWriteCHAR(buf, elem->prefix);
1684 xmlBufferWriteChar(buf, ":");
1685 }
1686 xmlBufferWriteCHAR(buf, elem->name);
1687 xmlBufferWriteChar(buf, " EMPTY>\n");
1688 break;
1689 case XML_ELEMENT_TYPE_ANY:
1690 xmlBufferWriteChar(buf, "<!ELEMENT ");
1691 if (elem->prefix != NULL) {
1692 xmlBufferWriteCHAR(buf, elem->prefix);
1693 xmlBufferWriteChar(buf, ":");
1694 }
1695 xmlBufferWriteCHAR(buf, elem->name);
1696 xmlBufferWriteChar(buf, " ANY>\n");
1697 break;
1698 case XML_ELEMENT_TYPE_MIXED:
1699 xmlBufferWriteChar(buf, "<!ELEMENT ");
1700 if (elem->prefix != NULL) {
1701 xmlBufferWriteCHAR(buf, elem->prefix);
1702 xmlBufferWriteChar(buf, ":");
1703 }
1704 xmlBufferWriteCHAR(buf, elem->name);
1705 xmlBufferWriteChar(buf, " ");
1706 xmlDumpElementContent(buf, elem->content, 1);
1707 xmlBufferWriteChar(buf, ">\n");
1708 break;
1709 case XML_ELEMENT_TYPE_ELEMENT:
1710 xmlBufferWriteChar(buf, "<!ELEMENT ");
1711 if (elem->prefix != NULL) {
1712 xmlBufferWriteCHAR(buf, elem->prefix);
1713 xmlBufferWriteChar(buf, ":");
1714 }
1715 xmlBufferWriteCHAR(buf, elem->name);
1716 xmlBufferWriteChar(buf, " ");
1717 xmlDumpElementContent(buf, elem->content, 1);
1718 xmlBufferWriteChar(buf, ">\n");
1719 break;
1720 default:
1721 xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
1722 "Internal: ELEMENT struct corrupted invalid type\n",
1723 NULL);
1724 }
1725 }
1726
1727 /**
1728 * xmlDumpElementDeclScan:
1729 * @elem: An element table
1730 * @buf: the XML buffer output
1731 *
1732 * This routine is used by the hash scan function. It just reverses
1733 * the arguments.
1734 */
1735 static void
xmlDumpElementDeclScan(void * elem,void * buf,const xmlChar * name ATTRIBUTE_UNUSED)1736 xmlDumpElementDeclScan(void *elem, void *buf,
1737 const xmlChar *name ATTRIBUTE_UNUSED) {
1738 xmlDumpElementDecl((xmlBufferPtr) buf, (xmlElementPtr) elem);
1739 }
1740
1741 /**
1742 * xmlDumpElementTable:
1743 * @buf: the XML buffer output
1744 * @table: An element table
1745 *
1746 * This will dump the content of the element table as an XML DTD definition
1747 */
1748 void
xmlDumpElementTable(xmlBufferPtr buf,xmlElementTablePtr table)1749 xmlDumpElementTable(xmlBufferPtr buf, xmlElementTablePtr table) {
1750 if ((buf == NULL) || (table == NULL))
1751 return;
1752 xmlHashScan(table, xmlDumpElementDeclScan, buf);
1753 }
1754 #endif /* LIBXML_OUTPUT_ENABLED */
1755
1756 /**
1757 * xmlCreateEnumeration:
1758 * @name: the enumeration name or NULL
1759 *
1760 * create and initialize an enumeration attribute node.
1761 *
1762 * Returns the xmlEnumerationPtr just created or NULL in case
1763 * of error.
1764 */
1765 xmlEnumerationPtr
xmlCreateEnumeration(const xmlChar * name)1766 xmlCreateEnumeration(const xmlChar *name) {
1767 xmlEnumerationPtr ret;
1768
1769 ret = (xmlEnumerationPtr) xmlMalloc(sizeof(xmlEnumeration));
1770 if (ret == NULL) {
1771 xmlVErrMemory(NULL, "malloc failed");
1772 return(NULL);
1773 }
1774 memset(ret, 0, sizeof(xmlEnumeration));
1775
1776 if (name != NULL)
1777 ret->name = xmlStrdup(name);
1778 return(ret);
1779 }
1780
1781 /**
1782 * xmlFreeEnumeration:
1783 * @cur: the tree to free.
1784 *
1785 * free an enumeration attribute node (recursive).
1786 */
1787 void
xmlFreeEnumeration(xmlEnumerationPtr cur)1788 xmlFreeEnumeration(xmlEnumerationPtr cur) {
1789 if (cur == NULL) return;
1790
1791 if (cur->next != NULL) xmlFreeEnumeration(cur->next);
1792
1793 if (cur->name != NULL) xmlFree((xmlChar *) cur->name);
1794 xmlFree(cur);
1795 }
1796
1797 #ifdef LIBXML_TREE_ENABLED
1798 /**
1799 * xmlCopyEnumeration:
1800 * @cur: the tree to copy.
1801 *
1802 * Copy an enumeration attribute node (recursive).
1803 *
1804 * Returns the xmlEnumerationPtr just created or NULL in case
1805 * of error.
1806 */
1807 xmlEnumerationPtr
xmlCopyEnumeration(xmlEnumerationPtr cur)1808 xmlCopyEnumeration(xmlEnumerationPtr cur) {
1809 xmlEnumerationPtr ret;
1810
1811 if (cur == NULL) return(NULL);
1812 ret = xmlCreateEnumeration((xmlChar *) cur->name);
1813 if (ret == NULL) return(NULL);
1814
1815 if (cur->next != NULL) ret->next = xmlCopyEnumeration(cur->next);
1816 else ret->next = NULL;
1817
1818 return(ret);
1819 }
1820 #endif /* LIBXML_TREE_ENABLED */
1821
1822 #ifdef LIBXML_OUTPUT_ENABLED
1823 /**
1824 * xmlDumpEnumeration:
1825 * @buf: the XML buffer output
1826 * @enum: An enumeration
1827 *
1828 * This will dump the content of the enumeration
1829 */
1830 static void
xmlDumpEnumeration(xmlBufferPtr buf,xmlEnumerationPtr cur)1831 xmlDumpEnumeration(xmlBufferPtr buf, xmlEnumerationPtr cur) {
1832 if ((buf == NULL) || (cur == NULL))
1833 return;
1834
1835 xmlBufferWriteCHAR(buf, cur->name);
1836 if (cur->next == NULL)
1837 xmlBufferWriteChar(buf, ")");
1838 else {
1839 xmlBufferWriteChar(buf, " | ");
1840 xmlDumpEnumeration(buf, cur->next);
1841 }
1842 }
1843 #endif /* LIBXML_OUTPUT_ENABLED */
1844
1845 #ifdef LIBXML_VALID_ENABLED
1846 /**
1847 * xmlScanIDAttributeDecl:
1848 * @ctxt: the validation context
1849 * @elem: the element name
1850 * @err: whether to raise errors here
1851 *
1852 * Verify that the element don't have too many ID attributes
1853 * declared.
1854 *
1855 * Returns the number of ID attributes found.
1856 */
1857 static int
xmlScanIDAttributeDecl(xmlValidCtxtPtr ctxt,xmlElementPtr elem,int err)1858 xmlScanIDAttributeDecl(xmlValidCtxtPtr ctxt, xmlElementPtr elem, int err) {
1859 xmlAttributePtr cur;
1860 int ret = 0;
1861
1862 if (elem == NULL) return(0);
1863 cur = elem->attributes;
1864 while (cur != NULL) {
1865 if (cur->atype == XML_ATTRIBUTE_ID) {
1866 ret ++;
1867 if ((ret > 1) && (err))
1868 xmlErrValidNode(ctxt, (xmlNodePtr) elem, XML_DTD_MULTIPLE_ID,
1869 "Element %s has too many ID attributes defined : %s\n",
1870 elem->name, cur->name, NULL);
1871 }
1872 cur = cur->nexth;
1873 }
1874 return(ret);
1875 }
1876 #endif /* LIBXML_VALID_ENABLED */
1877
1878 /**
1879 * xmlFreeAttribute:
1880 * @elem: An attribute
1881 *
1882 * Deallocate the memory used by an attribute definition
1883 */
1884 static void
xmlFreeAttribute(xmlAttributePtr attr)1885 xmlFreeAttribute(xmlAttributePtr attr) {
1886 xmlDictPtr dict;
1887
1888 if (attr == NULL) return;
1889 if (attr->doc != NULL)
1890 dict = attr->doc->dict;
1891 else
1892 dict = NULL;
1893 xmlUnlinkNode((xmlNodePtr) attr);
1894 if (attr->tree != NULL)
1895 xmlFreeEnumeration(attr->tree);
1896 if (dict) {
1897 if ((attr->elem != NULL) && (!xmlDictOwns(dict, attr->elem)))
1898 xmlFree((xmlChar *) attr->elem);
1899 if ((attr->name != NULL) && (!xmlDictOwns(dict, attr->name)))
1900 xmlFree((xmlChar *) attr->name);
1901 if ((attr->prefix != NULL) && (!xmlDictOwns(dict, attr->prefix)))
1902 xmlFree((xmlChar *) attr->prefix);
1903 if ((attr->defaultValue != NULL) &&
1904 (!xmlDictOwns(dict, attr->defaultValue)))
1905 xmlFree((xmlChar *) attr->defaultValue);
1906 } else {
1907 if (attr->elem != NULL)
1908 xmlFree((xmlChar *) attr->elem);
1909 if (attr->name != NULL)
1910 xmlFree((xmlChar *) attr->name);
1911 if (attr->defaultValue != NULL)
1912 xmlFree((xmlChar *) attr->defaultValue);
1913 if (attr->prefix != NULL)
1914 xmlFree((xmlChar *) attr->prefix);
1915 }
1916 xmlFree(attr);
1917 }
1918
1919
1920 /**
1921 * xmlAddAttributeDecl:
1922 * @ctxt: the validation context
1923 * @dtd: pointer to the DTD
1924 * @elem: the element name
1925 * @name: the attribute name
1926 * @ns: the attribute namespace prefix
1927 * @type: the attribute type
1928 * @def: the attribute default type
1929 * @defaultValue: the attribute default value
1930 * @tree: if it's an enumeration, the associated list
1931 *
1932 * Register a new attribute declaration
1933 * Note that @tree becomes the ownership of the DTD
1934 *
1935 * Returns NULL if not new, otherwise the attribute decl
1936 */
1937 xmlAttributePtr
xmlAddAttributeDecl(xmlValidCtxtPtr ctxt,xmlDtdPtr dtd,const xmlChar * elem,const xmlChar * name,const xmlChar * ns,xmlAttributeType type,xmlAttributeDefault def,const xmlChar * defaultValue,xmlEnumerationPtr tree)1938 xmlAddAttributeDecl(xmlValidCtxtPtr ctxt,
1939 xmlDtdPtr dtd, const xmlChar *elem,
1940 const xmlChar *name, const xmlChar *ns,
1941 xmlAttributeType type, xmlAttributeDefault def,
1942 const xmlChar *defaultValue, xmlEnumerationPtr tree) {
1943 xmlAttributePtr ret;
1944 xmlAttributeTablePtr table;
1945 xmlElementPtr elemDef;
1946 xmlDictPtr dict = NULL;
1947
1948 if (dtd == NULL) {
1949 xmlFreeEnumeration(tree);
1950 return(NULL);
1951 }
1952 if (name == NULL) {
1953 xmlFreeEnumeration(tree);
1954 return(NULL);
1955 }
1956 if (elem == NULL) {
1957 xmlFreeEnumeration(tree);
1958 return(NULL);
1959 }
1960 if (dtd->doc != NULL)
1961 dict = dtd->doc->dict;
1962
1963 #ifdef LIBXML_VALID_ENABLED
1964 /*
1965 * Check the type and possibly the default value.
1966 */
1967 switch (type) {
1968 case XML_ATTRIBUTE_CDATA:
1969 break;
1970 case XML_ATTRIBUTE_ID:
1971 break;
1972 case XML_ATTRIBUTE_IDREF:
1973 break;
1974 case XML_ATTRIBUTE_IDREFS:
1975 break;
1976 case XML_ATTRIBUTE_ENTITY:
1977 break;
1978 case XML_ATTRIBUTE_ENTITIES:
1979 break;
1980 case XML_ATTRIBUTE_NMTOKEN:
1981 break;
1982 case XML_ATTRIBUTE_NMTOKENS:
1983 break;
1984 case XML_ATTRIBUTE_ENUMERATION:
1985 break;
1986 case XML_ATTRIBUTE_NOTATION:
1987 break;
1988 default:
1989 xmlErrValid(ctxt, XML_ERR_INTERNAL_ERROR,
1990 "Internal: ATTRIBUTE struct corrupted invalid type\n",
1991 NULL);
1992 xmlFreeEnumeration(tree);
1993 return(NULL);
1994 }
1995 if ((defaultValue != NULL) &&
1996 (!xmlValidateAttributeValueInternal(dtd->doc, type, defaultValue))) {
1997 xmlErrValidNode(ctxt, (xmlNodePtr) dtd, XML_DTD_ATTRIBUTE_DEFAULT,
1998 "Attribute %s of %s: invalid default value\n",
1999 elem, name, defaultValue);
2000 defaultValue = NULL;
2001 if (ctxt != NULL)
2002 ctxt->valid = 0;
2003 }
2004 #endif /* LIBXML_VALID_ENABLED */
2005
2006 /*
2007 * Check first that an attribute defined in the external subset wasn't
2008 * already defined in the internal subset
2009 */
2010 if ((dtd->doc != NULL) && (dtd->doc->extSubset == dtd) &&
2011 (dtd->doc->intSubset != NULL) &&
2012 (dtd->doc->intSubset->attributes != NULL)) {
2013 ret = xmlHashLookup3(dtd->doc->intSubset->attributes, name, ns, elem);
2014 if (ret != NULL) {
2015 xmlFreeEnumeration(tree);
2016 return(NULL);
2017 }
2018 }
2019
2020 /*
2021 * Create the Attribute table if needed.
2022 */
2023 table = (xmlAttributeTablePtr) dtd->attributes;
2024 if (table == NULL) {
2025 table = xmlHashCreateDict(0, dict);
2026 dtd->attributes = (void *) table;
2027 }
2028 if (table == NULL) {
2029 xmlVErrMemory(ctxt,
2030 "xmlAddAttributeDecl: Table creation failed!\n");
2031 xmlFreeEnumeration(tree);
2032 return(NULL);
2033 }
2034
2035
2036 ret = (xmlAttributePtr) xmlMalloc(sizeof(xmlAttribute));
2037 if (ret == NULL) {
2038 xmlVErrMemory(ctxt, "malloc failed");
2039 xmlFreeEnumeration(tree);
2040 return(NULL);
2041 }
2042 memset(ret, 0, sizeof(xmlAttribute));
2043 ret->type = XML_ATTRIBUTE_DECL;
2044
2045 /*
2046 * fill the structure.
2047 */
2048 ret->atype = type;
2049 /*
2050 * doc must be set before possible error causes call
2051 * to xmlFreeAttribute (because it's used to check on
2052 * dict use)
2053 */
2054 ret->doc = dtd->doc;
2055 if (dict) {
2056 ret->name = xmlDictLookup(dict, name, -1);
2057 ret->prefix = xmlDictLookup(dict, ns, -1);
2058 ret->elem = xmlDictLookup(dict, elem, -1);
2059 } else {
2060 ret->name = xmlStrdup(name);
2061 ret->prefix = xmlStrdup(ns);
2062 ret->elem = xmlStrdup(elem);
2063 }
2064 ret->def = def;
2065 ret->tree = tree;
2066 if (defaultValue != NULL) {
2067 if (dict)
2068 ret->defaultValue = xmlDictLookup(dict, defaultValue, -1);
2069 else
2070 ret->defaultValue = xmlStrdup(defaultValue);
2071 }
2072
2073 /*
2074 * Validity Check:
2075 * Search the DTD for previous declarations of the ATTLIST
2076 */
2077 if (xmlHashAddEntry3(table, ret->name, ret->prefix, ret->elem, ret) < 0) {
2078 #ifdef LIBXML_VALID_ENABLED
2079 /*
2080 * The attribute is already defined in this DTD.
2081 */
2082 xmlErrValidWarning(ctxt, (xmlNodePtr) dtd, XML_DTD_ATTRIBUTE_REDEFINED,
2083 "Attribute %s of element %s: already defined\n",
2084 name, elem, NULL);
2085 #endif /* LIBXML_VALID_ENABLED */
2086 xmlFreeAttribute(ret);
2087 return(NULL);
2088 }
2089
2090 /*
2091 * Validity Check:
2092 * Multiple ID per element
2093 */
2094 elemDef = xmlGetDtdElementDesc2(dtd, elem, 1);
2095 if (elemDef != NULL) {
2096
2097 #ifdef LIBXML_VALID_ENABLED
2098 if ((type == XML_ATTRIBUTE_ID) &&
2099 (xmlScanIDAttributeDecl(NULL, elemDef, 1) != 0)) {
2100 xmlErrValidNode(ctxt, (xmlNodePtr) dtd, XML_DTD_MULTIPLE_ID,
2101 "Element %s has too may ID attributes defined : %s\n",
2102 elem, name, NULL);
2103 if (ctxt != NULL)
2104 ctxt->valid = 0;
2105 }
2106 #endif /* LIBXML_VALID_ENABLED */
2107
2108 /*
2109 * Insert namespace default def first they need to be
2110 * processed first.
2111 */
2112 if ((xmlStrEqual(ret->name, BAD_CAST "xmlns")) ||
2113 ((ret->prefix != NULL &&
2114 (xmlStrEqual(ret->prefix, BAD_CAST "xmlns"))))) {
2115 ret->nexth = elemDef->attributes;
2116 elemDef->attributes = ret;
2117 } else {
2118 xmlAttributePtr tmp = elemDef->attributes;
2119
2120 while ((tmp != NULL) &&
2121 ((xmlStrEqual(tmp->name, BAD_CAST "xmlns")) ||
2122 ((ret->prefix != NULL &&
2123 (xmlStrEqual(ret->prefix, BAD_CAST "xmlns")))))) {
2124 if (tmp->nexth == NULL)
2125 break;
2126 tmp = tmp->nexth;
2127 }
2128 if (tmp != NULL) {
2129 ret->nexth = tmp->nexth;
2130 tmp->nexth = ret;
2131 } else {
2132 ret->nexth = elemDef->attributes;
2133 elemDef->attributes = ret;
2134 }
2135 }
2136 }
2137
2138 /*
2139 * Link it to the DTD
2140 */
2141 ret->parent = dtd;
2142 if (dtd->last == NULL) {
2143 dtd->children = dtd->last = (xmlNodePtr) ret;
2144 } else {
2145 dtd->last->next = (xmlNodePtr) ret;
2146 ret->prev = dtd->last;
2147 dtd->last = (xmlNodePtr) ret;
2148 }
2149 return(ret);
2150 }
2151
2152 static void
xmlFreeAttributeTableEntry(void * attr,const xmlChar * name ATTRIBUTE_UNUSED)2153 xmlFreeAttributeTableEntry(void *attr, const xmlChar *name ATTRIBUTE_UNUSED) {
2154 xmlFreeAttribute((xmlAttributePtr) attr);
2155 }
2156
2157 /**
2158 * xmlFreeAttributeTable:
2159 * @table: An attribute table
2160 *
2161 * Deallocate the memory used by an entities hash table.
2162 */
2163 void
xmlFreeAttributeTable(xmlAttributeTablePtr table)2164 xmlFreeAttributeTable(xmlAttributeTablePtr table) {
2165 xmlHashFree(table, xmlFreeAttributeTableEntry);
2166 }
2167
2168 #ifdef LIBXML_TREE_ENABLED
2169 /**
2170 * xmlCopyAttribute:
2171 * @attr: An attribute
2172 *
2173 * Build a copy of an attribute.
2174 *
2175 * Returns the new xmlAttributePtr or NULL in case of error.
2176 */
2177 static void *
xmlCopyAttribute(void * payload,const xmlChar * name ATTRIBUTE_UNUSED)2178 xmlCopyAttribute(void *payload, const xmlChar *name ATTRIBUTE_UNUSED) {
2179 xmlAttributePtr attr = (xmlAttributePtr) payload;
2180 xmlAttributePtr cur;
2181
2182 cur = (xmlAttributePtr) xmlMalloc(sizeof(xmlAttribute));
2183 if (cur == NULL) {
2184 xmlVErrMemory(NULL, "malloc failed");
2185 return(NULL);
2186 }
2187 memset(cur, 0, sizeof(xmlAttribute));
2188 cur->type = XML_ATTRIBUTE_DECL;
2189 cur->atype = attr->atype;
2190 cur->def = attr->def;
2191 cur->tree = xmlCopyEnumeration(attr->tree);
2192 if (attr->elem != NULL)
2193 cur->elem = xmlStrdup(attr->elem);
2194 if (attr->name != NULL)
2195 cur->name = xmlStrdup(attr->name);
2196 if (attr->prefix != NULL)
2197 cur->prefix = xmlStrdup(attr->prefix);
2198 if (attr->defaultValue != NULL)
2199 cur->defaultValue = xmlStrdup(attr->defaultValue);
2200 return(cur);
2201 }
2202
2203 /**
2204 * xmlCopyAttributeTable:
2205 * @table: An attribute table
2206 *
2207 * Build a copy of an attribute table.
2208 *
2209 * Returns the new xmlAttributeTablePtr or NULL in case of error.
2210 */
2211 xmlAttributeTablePtr
xmlCopyAttributeTable(xmlAttributeTablePtr table)2212 xmlCopyAttributeTable(xmlAttributeTablePtr table) {
2213 return((xmlAttributeTablePtr) xmlHashCopy(table, xmlCopyAttribute));
2214 }
2215 #endif /* LIBXML_TREE_ENABLED */
2216
2217 #ifdef LIBXML_OUTPUT_ENABLED
2218 /**
2219 * xmlDumpAttributeDecl:
2220 * @buf: the XML buffer output
2221 * @attr: An attribute declaration
2222 *
2223 * This will dump the content of the attribute declaration as an XML
2224 * DTD definition
2225 */
2226 void
xmlDumpAttributeDecl(xmlBufferPtr buf,xmlAttributePtr attr)2227 xmlDumpAttributeDecl(xmlBufferPtr buf, xmlAttributePtr attr) {
2228 if ((buf == NULL) || (attr == NULL))
2229 return;
2230 xmlBufferWriteChar(buf, "<!ATTLIST ");
2231 xmlBufferWriteCHAR(buf, attr->elem);
2232 xmlBufferWriteChar(buf, " ");
2233 if (attr->prefix != NULL) {
2234 xmlBufferWriteCHAR(buf, attr->prefix);
2235 xmlBufferWriteChar(buf, ":");
2236 }
2237 xmlBufferWriteCHAR(buf, attr->name);
2238 switch (attr->atype) {
2239 case XML_ATTRIBUTE_CDATA:
2240 xmlBufferWriteChar(buf, " CDATA");
2241 break;
2242 case XML_ATTRIBUTE_ID:
2243 xmlBufferWriteChar(buf, " ID");
2244 break;
2245 case XML_ATTRIBUTE_IDREF:
2246 xmlBufferWriteChar(buf, " IDREF");
2247 break;
2248 case XML_ATTRIBUTE_IDREFS:
2249 xmlBufferWriteChar(buf, " IDREFS");
2250 break;
2251 case XML_ATTRIBUTE_ENTITY:
2252 xmlBufferWriteChar(buf, " ENTITY");
2253 break;
2254 case XML_ATTRIBUTE_ENTITIES:
2255 xmlBufferWriteChar(buf, " ENTITIES");
2256 break;
2257 case XML_ATTRIBUTE_NMTOKEN:
2258 xmlBufferWriteChar(buf, " NMTOKEN");
2259 break;
2260 case XML_ATTRIBUTE_NMTOKENS:
2261 xmlBufferWriteChar(buf, " NMTOKENS");
2262 break;
2263 case XML_ATTRIBUTE_ENUMERATION:
2264 xmlBufferWriteChar(buf, " (");
2265 xmlDumpEnumeration(buf, attr->tree);
2266 break;
2267 case XML_ATTRIBUTE_NOTATION:
2268 xmlBufferWriteChar(buf, " NOTATION (");
2269 xmlDumpEnumeration(buf, attr->tree);
2270 break;
2271 default:
2272 xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
2273 "Internal: ATTRIBUTE struct corrupted invalid type\n",
2274 NULL);
2275 }
2276 switch (attr->def) {
2277 case XML_ATTRIBUTE_NONE:
2278 break;
2279 case XML_ATTRIBUTE_REQUIRED:
2280 xmlBufferWriteChar(buf, " #REQUIRED");
2281 break;
2282 case XML_ATTRIBUTE_IMPLIED:
2283 xmlBufferWriteChar(buf, " #IMPLIED");
2284 break;
2285 case XML_ATTRIBUTE_FIXED:
2286 xmlBufferWriteChar(buf, " #FIXED");
2287 break;
2288 default:
2289 xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
2290 "Internal: ATTRIBUTE struct corrupted invalid def\n",
2291 NULL);
2292 }
2293 if (attr->defaultValue != NULL) {
2294 xmlBufferWriteChar(buf, " ");
2295 xmlBufferWriteQuotedString(buf, attr->defaultValue);
2296 }
2297 xmlBufferWriteChar(buf, ">\n");
2298 }
2299
2300 /**
2301 * xmlDumpAttributeDeclScan:
2302 * @attr: An attribute declaration
2303 * @buf: the XML buffer output
2304 *
2305 * This is used with the hash scan function - just reverses arguments
2306 */
2307 static void
xmlDumpAttributeDeclScan(void * attr,void * buf,const xmlChar * name ATTRIBUTE_UNUSED)2308 xmlDumpAttributeDeclScan(void *attr, void *buf,
2309 const xmlChar *name ATTRIBUTE_UNUSED) {
2310 xmlDumpAttributeDecl((xmlBufferPtr) buf, (xmlAttributePtr) attr);
2311 }
2312
2313 /**
2314 * xmlDumpAttributeTable:
2315 * @buf: the XML buffer output
2316 * @table: An attribute table
2317 *
2318 * This will dump the content of the attribute table as an XML DTD definition
2319 */
2320 void
xmlDumpAttributeTable(xmlBufferPtr buf,xmlAttributeTablePtr table)2321 xmlDumpAttributeTable(xmlBufferPtr buf, xmlAttributeTablePtr table) {
2322 if ((buf == NULL) || (table == NULL))
2323 return;
2324 xmlHashScan(table, xmlDumpAttributeDeclScan, buf);
2325 }
2326 #endif /* LIBXML_OUTPUT_ENABLED */
2327
2328 /************************************************************************
2329 * *
2330 * NOTATIONs *
2331 * *
2332 ************************************************************************/
2333 /**
2334 * xmlFreeNotation:
2335 * @not: A notation
2336 *
2337 * Deallocate the memory used by an notation definition
2338 */
2339 static void
xmlFreeNotation(xmlNotationPtr nota)2340 xmlFreeNotation(xmlNotationPtr nota) {
2341 if (nota == NULL) return;
2342 if (nota->name != NULL)
2343 xmlFree((xmlChar *) nota->name);
2344 if (nota->PublicID != NULL)
2345 xmlFree((xmlChar *) nota->PublicID);
2346 if (nota->SystemID != NULL)
2347 xmlFree((xmlChar *) nota->SystemID);
2348 xmlFree(nota);
2349 }
2350
2351
2352 /**
2353 * xmlAddNotationDecl:
2354 * @dtd: pointer to the DTD
2355 * @ctxt: the validation context
2356 * @name: the entity name
2357 * @PublicID: the public identifier or NULL
2358 * @SystemID: the system identifier or NULL
2359 *
2360 * Register a new notation declaration
2361 *
2362 * Returns NULL if not, otherwise the entity
2363 */
2364 xmlNotationPtr
xmlAddNotationDecl(xmlValidCtxtPtr ctxt,xmlDtdPtr dtd,const xmlChar * name,const xmlChar * PublicID,const xmlChar * SystemID)2365 xmlAddNotationDecl(xmlValidCtxtPtr ctxt, xmlDtdPtr dtd,
2366 const xmlChar *name,
2367 const xmlChar *PublicID, const xmlChar *SystemID) {
2368 xmlNotationPtr ret;
2369 xmlNotationTablePtr table;
2370
2371 if (dtd == NULL) {
2372 return(NULL);
2373 }
2374 if (name == NULL) {
2375 return(NULL);
2376 }
2377 if ((PublicID == NULL) && (SystemID == NULL)) {
2378 return(NULL);
2379 }
2380
2381 /*
2382 * Create the Notation table if needed.
2383 */
2384 table = (xmlNotationTablePtr) dtd->notations;
2385 if (table == NULL) {
2386 xmlDictPtr dict = NULL;
2387 if (dtd->doc != NULL)
2388 dict = dtd->doc->dict;
2389
2390 dtd->notations = table = xmlHashCreateDict(0, dict);
2391 }
2392 if (table == NULL) {
2393 xmlVErrMemory(ctxt,
2394 "xmlAddNotationDecl: Table creation failed!\n");
2395 return(NULL);
2396 }
2397
2398 ret = (xmlNotationPtr) xmlMalloc(sizeof(xmlNotation));
2399 if (ret == NULL) {
2400 xmlVErrMemory(ctxt, "malloc failed");
2401 return(NULL);
2402 }
2403 memset(ret, 0, sizeof(xmlNotation));
2404
2405 /*
2406 * fill the structure.
2407 */
2408 ret->name = xmlStrdup(name);
2409 if (SystemID != NULL)
2410 ret->SystemID = xmlStrdup(SystemID);
2411 if (PublicID != NULL)
2412 ret->PublicID = xmlStrdup(PublicID);
2413
2414 /*
2415 * Validity Check:
2416 * Check the DTD for previous declarations of the ATTLIST
2417 */
2418 if (xmlHashAddEntry(table, name, ret)) {
2419 #ifdef LIBXML_VALID_ENABLED
2420 xmlErrValid(NULL, XML_DTD_NOTATION_REDEFINED,
2421 "xmlAddNotationDecl: %s already defined\n",
2422 (const char *) name);
2423 #endif /* LIBXML_VALID_ENABLED */
2424 xmlFreeNotation(ret);
2425 return(NULL);
2426 }
2427 return(ret);
2428 }
2429
2430 static void
xmlFreeNotationTableEntry(void * nota,const xmlChar * name ATTRIBUTE_UNUSED)2431 xmlFreeNotationTableEntry(void *nota, const xmlChar *name ATTRIBUTE_UNUSED) {
2432 xmlFreeNotation((xmlNotationPtr) nota);
2433 }
2434
2435 /**
2436 * xmlFreeNotationTable:
2437 * @table: An notation table
2438 *
2439 * Deallocate the memory used by an entities hash table.
2440 */
2441 void
xmlFreeNotationTable(xmlNotationTablePtr table)2442 xmlFreeNotationTable(xmlNotationTablePtr table) {
2443 xmlHashFree(table, xmlFreeNotationTableEntry);
2444 }
2445
2446 #ifdef LIBXML_TREE_ENABLED
2447 /**
2448 * xmlCopyNotation:
2449 * @nota: A notation
2450 *
2451 * Build a copy of a notation.
2452 *
2453 * Returns the new xmlNotationPtr or NULL in case of error.
2454 */
2455 static void *
xmlCopyNotation(void * payload,const xmlChar * name ATTRIBUTE_UNUSED)2456 xmlCopyNotation(void *payload, const xmlChar *name ATTRIBUTE_UNUSED) {
2457 xmlNotationPtr nota = (xmlNotationPtr) payload;
2458 xmlNotationPtr cur;
2459
2460 cur = (xmlNotationPtr) xmlMalloc(sizeof(xmlNotation));
2461 if (cur == NULL) {
2462 xmlVErrMemory(NULL, "malloc failed");
2463 return(NULL);
2464 }
2465 if (nota->name != NULL)
2466 cur->name = xmlStrdup(nota->name);
2467 else
2468 cur->name = NULL;
2469 if (nota->PublicID != NULL)
2470 cur->PublicID = xmlStrdup(nota->PublicID);
2471 else
2472 cur->PublicID = NULL;
2473 if (nota->SystemID != NULL)
2474 cur->SystemID = xmlStrdup(nota->SystemID);
2475 else
2476 cur->SystemID = NULL;
2477 return(cur);
2478 }
2479
2480 /**
2481 * xmlCopyNotationTable:
2482 * @table: A notation table
2483 *
2484 * Build a copy of a notation table.
2485 *
2486 * Returns the new xmlNotationTablePtr or NULL in case of error.
2487 */
2488 xmlNotationTablePtr
xmlCopyNotationTable(xmlNotationTablePtr table)2489 xmlCopyNotationTable(xmlNotationTablePtr table) {
2490 return((xmlNotationTablePtr) xmlHashCopy(table, xmlCopyNotation));
2491 }
2492 #endif /* LIBXML_TREE_ENABLED */
2493
2494 #ifdef LIBXML_OUTPUT_ENABLED
2495 /**
2496 * xmlDumpNotationDecl:
2497 * @buf: the XML buffer output
2498 * @nota: A notation declaration
2499 *
2500 * This will dump the content the notation declaration as an XML DTD definition
2501 */
2502 void
xmlDumpNotationDecl(xmlBufferPtr buf,xmlNotationPtr nota)2503 xmlDumpNotationDecl(xmlBufferPtr buf, xmlNotationPtr nota) {
2504 if ((buf == NULL) || (nota == NULL))
2505 return;
2506 xmlBufferWriteChar(buf, "<!NOTATION ");
2507 xmlBufferWriteCHAR(buf, nota->name);
2508 if (nota->PublicID != NULL) {
2509 xmlBufferWriteChar(buf, " PUBLIC ");
2510 xmlBufferWriteQuotedString(buf, nota->PublicID);
2511 if (nota->SystemID != NULL) {
2512 xmlBufferWriteChar(buf, " ");
2513 xmlBufferWriteQuotedString(buf, nota->SystemID);
2514 }
2515 } else {
2516 xmlBufferWriteChar(buf, " SYSTEM ");
2517 xmlBufferWriteQuotedString(buf, nota->SystemID);
2518 }
2519 xmlBufferWriteChar(buf, " >\n");
2520 }
2521
2522 /**
2523 * xmlDumpNotationDeclScan:
2524 * @nota: A notation declaration
2525 * @buf: the XML buffer output
2526 *
2527 * This is called with the hash scan function, and just reverses args
2528 */
2529 static void
xmlDumpNotationDeclScan(void * nota,void * buf,const xmlChar * name ATTRIBUTE_UNUSED)2530 xmlDumpNotationDeclScan(void *nota, void *buf,
2531 const xmlChar *name ATTRIBUTE_UNUSED) {
2532 xmlDumpNotationDecl((xmlBufferPtr) buf, (xmlNotationPtr) nota);
2533 }
2534
2535 /**
2536 * xmlDumpNotationTable:
2537 * @buf: the XML buffer output
2538 * @table: A notation table
2539 *
2540 * This will dump the content of the notation table as an XML DTD definition
2541 */
2542 void
xmlDumpNotationTable(xmlBufferPtr buf,xmlNotationTablePtr table)2543 xmlDumpNotationTable(xmlBufferPtr buf, xmlNotationTablePtr table) {
2544 if ((buf == NULL) || (table == NULL))
2545 return;
2546 xmlHashScan(table, xmlDumpNotationDeclScan, buf);
2547 }
2548 #endif /* LIBXML_OUTPUT_ENABLED */
2549
2550 /************************************************************************
2551 * *
2552 * IDs *
2553 * *
2554 ************************************************************************/
2555 /**
2556 * DICT_FREE:
2557 * @str: a string
2558 *
2559 * Free a string if it is not owned by the "dict" dictionary in the
2560 * current scope
2561 */
2562 #define DICT_FREE(str) \
2563 if ((str) && ((!dict) || \
2564 (xmlDictOwns(dict, (const xmlChar *)(str)) == 0))) \
2565 xmlFree((char *)(str));
2566
2567 /**
2568 * xmlFreeID:
2569 * @not: A id
2570 *
2571 * Deallocate the memory used by an id definition
2572 */
2573 static void
xmlFreeID(xmlIDPtr id)2574 xmlFreeID(xmlIDPtr id) {
2575 xmlDictPtr dict = NULL;
2576
2577 if (id == NULL) return;
2578
2579 if (id->doc != NULL)
2580 dict = id->doc->dict;
2581
2582 if (id->value != NULL)
2583 DICT_FREE(id->value)
2584 if (id->name != NULL)
2585 DICT_FREE(id->name)
2586 xmlFree(id);
2587 }
2588
2589
2590 /**
2591 * xmlAddID:
2592 * @ctxt: the validation context
2593 * @doc: pointer to the document
2594 * @value: the value name
2595 * @attr: the attribute holding the ID
2596 *
2597 * Register a new id declaration
2598 *
2599 * Returns NULL if not, otherwise the new xmlIDPtr
2600 */
2601 xmlIDPtr
xmlAddID(xmlValidCtxtPtr ctxt,xmlDocPtr doc,const xmlChar * value,xmlAttrPtr attr)2602 xmlAddID(xmlValidCtxtPtr ctxt, xmlDocPtr doc, const xmlChar *value,
2603 xmlAttrPtr attr) {
2604 xmlIDPtr ret;
2605 xmlIDTablePtr table;
2606
2607 if (doc == NULL) {
2608 return(NULL);
2609 }
2610 if (value == NULL) {
2611 return(NULL);
2612 }
2613 if (attr == NULL) {
2614 return(NULL);
2615 }
2616
2617 /*
2618 * Create the ID table if needed.
2619 */
2620 table = (xmlIDTablePtr) doc->ids;
2621 if (table == NULL) {
2622 doc->ids = table = xmlHashCreateDict(0, doc->dict);
2623 }
2624 if (table == NULL) {
2625 xmlVErrMemory(ctxt,
2626 "xmlAddID: Table creation failed!\n");
2627 return(NULL);
2628 }
2629
2630 ret = (xmlIDPtr) xmlMalloc(sizeof(xmlID));
2631 if (ret == NULL) {
2632 xmlVErrMemory(ctxt, "malloc failed");
2633 return(NULL);
2634 }
2635
2636 /*
2637 * fill the structure.
2638 */
2639 ret->value = xmlStrdup(value);
2640 ret->doc = doc;
2641 if ((ctxt != NULL) && (ctxt->vstateNr != 0)) {
2642 /*
2643 * Operating in streaming mode, attr is gonna disapear
2644 */
2645 if (doc->dict != NULL)
2646 ret->name = xmlDictLookup(doc->dict, attr->name, -1);
2647 else
2648 ret->name = xmlStrdup(attr->name);
2649 ret->attr = NULL;
2650 } else {
2651 ret->attr = attr;
2652 ret->name = NULL;
2653 }
2654 ret->lineno = xmlGetLineNo(attr->parent);
2655
2656 if (xmlHashAddEntry(table, value, ret) < 0) {
2657 #ifdef LIBXML_VALID_ENABLED
2658 /*
2659 * The id is already defined in this DTD.
2660 */
2661 if (ctxt != NULL) {
2662 xmlErrValidNode(ctxt, attr->parent, XML_DTD_ID_REDEFINED,
2663 "ID %s already defined\n", value, NULL, NULL);
2664 }
2665 #endif /* LIBXML_VALID_ENABLED */
2666 xmlFreeID(ret);
2667 return(NULL);
2668 }
2669 if (attr != NULL)
2670 attr->atype = XML_ATTRIBUTE_ID;
2671 return(ret);
2672 }
2673
2674 static void
xmlFreeIDTableEntry(void * id,const xmlChar * name ATTRIBUTE_UNUSED)2675 xmlFreeIDTableEntry(void *id, const xmlChar *name ATTRIBUTE_UNUSED) {
2676 xmlFreeID((xmlIDPtr) id);
2677 }
2678
2679 /**
2680 * xmlFreeIDTable:
2681 * @table: An id table
2682 *
2683 * Deallocate the memory used by an ID hash table.
2684 */
2685 void
xmlFreeIDTable(xmlIDTablePtr table)2686 xmlFreeIDTable(xmlIDTablePtr table) {
2687 xmlHashFree(table, xmlFreeIDTableEntry);
2688 }
2689
2690 /**
2691 * xmlIsID:
2692 * @doc: the document
2693 * @elem: the element carrying the attribute
2694 * @attr: the attribute
2695 *
2696 * Determine whether an attribute is of type ID. In case we have DTD(s)
2697 * then this is done if DTD loading has been requested. In the case
2698 * of HTML documents parsed with the HTML parser, then ID detection is
2699 * done systematically.
2700 *
2701 * Returns 0 or 1 depending on the lookup result
2702 */
2703 int
xmlIsID(xmlDocPtr doc,xmlNodePtr elem,xmlAttrPtr attr)2704 xmlIsID(xmlDocPtr doc, xmlNodePtr elem, xmlAttrPtr attr) {
2705 if ((attr == NULL) || (attr->name == NULL)) return(0);
2706 if ((attr->ns != NULL) && (attr->ns->prefix != NULL) &&
2707 (!strcmp((char *) attr->name, "id")) &&
2708 (!strcmp((char *) attr->ns->prefix, "xml")))
2709 return(1);
2710 if (doc == NULL) return(0);
2711 if ((doc->intSubset == NULL) && (doc->extSubset == NULL) &&
2712 (doc->type != XML_HTML_DOCUMENT_NODE)) {
2713 return(0);
2714 } else if (doc->type == XML_HTML_DOCUMENT_NODE) {
2715 if ((xmlStrEqual(BAD_CAST "id", attr->name)) ||
2716 ((xmlStrEqual(BAD_CAST "name", attr->name)) &&
2717 ((elem == NULL) || (xmlStrEqual(elem->name, BAD_CAST "a")))))
2718 return(1);
2719 return(0);
2720 } else if (elem == NULL) {
2721 return(0);
2722 } else {
2723 xmlAttributePtr attrDecl = NULL;
2724
2725 xmlChar felem[50], fattr[50];
2726 xmlChar *fullelemname, *fullattrname;
2727
2728 fullelemname = (elem->ns != NULL && elem->ns->prefix != NULL) ?
2729 xmlBuildQName(elem->name, elem->ns->prefix, felem, 50) :
2730 (xmlChar *)elem->name;
2731
2732 fullattrname = (attr->ns != NULL && attr->ns->prefix != NULL) ?
2733 xmlBuildQName(attr->name, attr->ns->prefix, fattr, 50) :
2734 (xmlChar *)attr->name;
2735
2736 if (fullelemname != NULL && fullattrname != NULL) {
2737 attrDecl = xmlGetDtdAttrDesc(doc->intSubset, fullelemname,
2738 fullattrname);
2739 if ((attrDecl == NULL) && (doc->extSubset != NULL))
2740 attrDecl = xmlGetDtdAttrDesc(doc->extSubset, fullelemname,
2741 fullattrname);
2742 }
2743
2744 if ((fullattrname != fattr) && (fullattrname != attr->name))
2745 xmlFree(fullattrname);
2746 if ((fullelemname != felem) && (fullelemname != elem->name))
2747 xmlFree(fullelemname);
2748
2749 if ((attrDecl != NULL) && (attrDecl->atype == XML_ATTRIBUTE_ID))
2750 return(1);
2751 }
2752 return(0);
2753 }
2754
2755 /**
2756 * xmlRemoveID:
2757 * @doc: the document
2758 * @attr: the attribute
2759 *
2760 * Remove the given attribute from the ID table maintained internally.
2761 *
2762 * Returns -1 if the lookup failed and 0 otherwise
2763 */
2764 int
xmlRemoveID(xmlDocPtr doc,xmlAttrPtr attr)2765 xmlRemoveID(xmlDocPtr doc, xmlAttrPtr attr) {
2766 xmlIDTablePtr table;
2767 xmlIDPtr id;
2768 xmlChar *ID;
2769
2770 if (doc == NULL) return(-1);
2771 if (attr == NULL) return(-1);
2772
2773 table = (xmlIDTablePtr) doc->ids;
2774 if (table == NULL)
2775 return(-1);
2776
2777 ID = xmlNodeListGetString(doc, attr->children, 1);
2778 if (ID == NULL)
2779 return(-1);
2780
2781 id = xmlHashLookup(table, ID);
2782 if (id == NULL || id->attr != attr) {
2783 xmlFree(ID);
2784 return(-1);
2785 }
2786
2787 xmlHashRemoveEntry(table, ID, xmlFreeIDTableEntry);
2788 xmlFree(ID);
2789 attr->atype = 0;
2790 return(0);
2791 }
2792
2793 /**
2794 * xmlGetID:
2795 * @doc: pointer to the document
2796 * @ID: the ID value
2797 *
2798 * Search the attribute declaring the given ID
2799 *
2800 * Returns NULL if not found, otherwise the xmlAttrPtr defining the ID
2801 */
2802 xmlAttrPtr
xmlGetID(xmlDocPtr doc,const xmlChar * ID)2803 xmlGetID(xmlDocPtr doc, const xmlChar *ID) {
2804 xmlIDTablePtr table;
2805 xmlIDPtr id;
2806
2807 if (doc == NULL) {
2808 return(NULL);
2809 }
2810
2811 if (ID == NULL) {
2812 return(NULL);
2813 }
2814
2815 table = (xmlIDTablePtr) doc->ids;
2816 if (table == NULL)
2817 return(NULL);
2818
2819 id = xmlHashLookup(table, ID);
2820 if (id == NULL)
2821 return(NULL);
2822 if (id->attr == NULL) {
2823 /*
2824 * We are operating on a stream, return a well known reference
2825 * since the attribute node doesn't exist anymore
2826 */
2827 return((xmlAttrPtr) doc);
2828 }
2829 return(id->attr);
2830 }
2831
2832 /************************************************************************
2833 * *
2834 * Refs *
2835 * *
2836 ************************************************************************/
2837 typedef struct xmlRemoveMemo_t
2838 {
2839 xmlListPtr l;
2840 xmlAttrPtr ap;
2841 } xmlRemoveMemo;
2842
2843 typedef xmlRemoveMemo *xmlRemoveMemoPtr;
2844
2845 typedef struct xmlValidateMemo_t
2846 {
2847 xmlValidCtxtPtr ctxt;
2848 const xmlChar *name;
2849 } xmlValidateMemo;
2850
2851 typedef xmlValidateMemo *xmlValidateMemoPtr;
2852
2853 /**
2854 * xmlFreeRef:
2855 * @lk: A list link
2856 *
2857 * Deallocate the memory used by a ref definition
2858 */
2859 static void
xmlFreeRef(xmlLinkPtr lk)2860 xmlFreeRef(xmlLinkPtr lk) {
2861 xmlRefPtr ref = (xmlRefPtr)xmlLinkGetData(lk);
2862 if (ref == NULL) return;
2863 if (ref->value != NULL)
2864 xmlFree((xmlChar *)ref->value);
2865 if (ref->name != NULL)
2866 xmlFree((xmlChar *)ref->name);
2867 xmlFree(ref);
2868 }
2869
2870 /**
2871 * xmlFreeRefTableEntry:
2872 * @list_ref: A list of references.
2873 *
2874 * Deallocate the memory used by a list of references
2875 */
2876 static void
xmlFreeRefTableEntry(void * payload,const xmlChar * name ATTRIBUTE_UNUSED)2877 xmlFreeRefTableEntry(void *payload, const xmlChar *name ATTRIBUTE_UNUSED) {
2878 xmlListPtr list_ref = (xmlListPtr) payload;
2879 if (list_ref == NULL) return;
2880 xmlListDelete(list_ref);
2881 }
2882
2883 /**
2884 * xmlWalkRemoveRef:
2885 * @data: Contents of current link
2886 * @user: Value supplied by the user
2887 *
2888 * Returns 0 to abort the walk or 1 to continue
2889 */
2890 static int
xmlWalkRemoveRef(const void * data,void * user)2891 xmlWalkRemoveRef(const void *data, void *user)
2892 {
2893 xmlAttrPtr attr0 = ((xmlRefPtr)data)->attr;
2894 xmlAttrPtr attr1 = ((xmlRemoveMemoPtr)user)->ap;
2895 xmlListPtr ref_list = ((xmlRemoveMemoPtr)user)->l;
2896
2897 if (attr0 == attr1) { /* Matched: remove and terminate walk */
2898 xmlListRemoveFirst(ref_list, (void *)data);
2899 return 0;
2900 }
2901 return 1;
2902 }
2903
2904 /**
2905 * xmlDummyCompare
2906 * @data0: Value supplied by the user
2907 * @data1: Value supplied by the user
2908 *
2909 * Do nothing, return 0. Used to create unordered lists.
2910 */
2911 static int
xmlDummyCompare(const void * data0 ATTRIBUTE_UNUSED,const void * data1 ATTRIBUTE_UNUSED)2912 xmlDummyCompare(const void *data0 ATTRIBUTE_UNUSED,
2913 const void *data1 ATTRIBUTE_UNUSED)
2914 {
2915 return (0);
2916 }
2917
2918 /**
2919 * xmlAddRef:
2920 * @ctxt: the validation context
2921 * @doc: pointer to the document
2922 * @value: the value name
2923 * @attr: the attribute holding the Ref
2924 *
2925 * Register a new ref declaration
2926 *
2927 * Returns NULL if not, otherwise the new xmlRefPtr
2928 */
2929 xmlRefPtr
xmlAddRef(xmlValidCtxtPtr ctxt,xmlDocPtr doc,const xmlChar * value,xmlAttrPtr attr)2930 xmlAddRef(xmlValidCtxtPtr ctxt, xmlDocPtr doc, const xmlChar *value,
2931 xmlAttrPtr attr) {
2932 xmlRefPtr ret;
2933 xmlRefTablePtr table;
2934 xmlListPtr ref_list;
2935
2936 if (doc == NULL) {
2937 return(NULL);
2938 }
2939 if (value == NULL) {
2940 return(NULL);
2941 }
2942 if (attr == NULL) {
2943 return(NULL);
2944 }
2945
2946 /*
2947 * Create the Ref table if needed.
2948 */
2949 table = (xmlRefTablePtr) doc->refs;
2950 if (table == NULL) {
2951 doc->refs = table = xmlHashCreateDict(0, doc->dict);
2952 }
2953 if (table == NULL) {
2954 xmlVErrMemory(ctxt,
2955 "xmlAddRef: Table creation failed!\n");
2956 return(NULL);
2957 }
2958
2959 ret = (xmlRefPtr) xmlMalloc(sizeof(xmlRef));
2960 if (ret == NULL) {
2961 xmlVErrMemory(ctxt, "malloc failed");
2962 return(NULL);
2963 }
2964
2965 /*
2966 * fill the structure.
2967 */
2968 ret->value = xmlStrdup(value);
2969 if ((ctxt != NULL) && (ctxt->vstateNr != 0)) {
2970 /*
2971 * Operating in streaming mode, attr is gonna disapear
2972 */
2973 ret->name = xmlStrdup(attr->name);
2974 ret->attr = NULL;
2975 } else {
2976 ret->name = NULL;
2977 ret->attr = attr;
2978 }
2979 ret->lineno = xmlGetLineNo(attr->parent);
2980
2981 /* To add a reference :-
2982 * References are maintained as a list of references,
2983 * Lookup the entry, if no entry create new nodelist
2984 * Add the owning node to the NodeList
2985 * Return the ref
2986 */
2987
2988 if (NULL == (ref_list = xmlHashLookup(table, value))) {
2989 if (NULL == (ref_list = xmlListCreate(xmlFreeRef, xmlDummyCompare))) {
2990 xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
2991 "xmlAddRef: Reference list creation failed!\n",
2992 NULL);
2993 goto failed;
2994 }
2995 if (xmlHashAddEntry(table, value, ref_list) < 0) {
2996 xmlListDelete(ref_list);
2997 xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
2998 "xmlAddRef: Reference list insertion failed!\n",
2999 NULL);
3000 goto failed;
3001 }
3002 }
3003 if (xmlListAppend(ref_list, ret) != 0) {
3004 xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
3005 "xmlAddRef: Reference list insertion failed!\n",
3006 NULL);
3007 goto failed;
3008 }
3009 return(ret);
3010 failed:
3011 if (ret != NULL) {
3012 if (ret->value != NULL)
3013 xmlFree((char *)ret->value);
3014 if (ret->name != NULL)
3015 xmlFree((char *)ret->name);
3016 xmlFree(ret);
3017 }
3018 return(NULL);
3019 }
3020
3021 /**
3022 * xmlFreeRefTable:
3023 * @table: An ref table
3024 *
3025 * Deallocate the memory used by an Ref hash table.
3026 */
3027 void
xmlFreeRefTable(xmlRefTablePtr table)3028 xmlFreeRefTable(xmlRefTablePtr table) {
3029 xmlHashFree(table, xmlFreeRefTableEntry);
3030 }
3031
3032 /**
3033 * xmlIsRef:
3034 * @doc: the document
3035 * @elem: the element carrying the attribute
3036 * @attr: the attribute
3037 *
3038 * Determine whether an attribute is of type Ref. In case we have DTD(s)
3039 * then this is simple, otherwise we use an heuristic: name Ref (upper
3040 * or lowercase).
3041 *
3042 * Returns 0 or 1 depending on the lookup result
3043 */
3044 int
xmlIsRef(xmlDocPtr doc,xmlNodePtr elem,xmlAttrPtr attr)3045 xmlIsRef(xmlDocPtr doc, xmlNodePtr elem, xmlAttrPtr attr) {
3046 if (attr == NULL)
3047 return(0);
3048 if (doc == NULL) {
3049 doc = attr->doc;
3050 if (doc == NULL) return(0);
3051 }
3052
3053 if ((doc->intSubset == NULL) && (doc->extSubset == NULL)) {
3054 return(0);
3055 } else if (doc->type == XML_HTML_DOCUMENT_NODE) {
3056 /* TODO @@@ */
3057 return(0);
3058 } else {
3059 xmlAttributePtr attrDecl;
3060
3061 if (elem == NULL) return(0);
3062 attrDecl = xmlGetDtdAttrDesc(doc->intSubset, elem->name, attr->name);
3063 if ((attrDecl == NULL) && (doc->extSubset != NULL))
3064 attrDecl = xmlGetDtdAttrDesc(doc->extSubset,
3065 elem->name, attr->name);
3066
3067 if ((attrDecl != NULL) &&
3068 (attrDecl->atype == XML_ATTRIBUTE_IDREF ||
3069 attrDecl->atype == XML_ATTRIBUTE_IDREFS))
3070 return(1);
3071 }
3072 return(0);
3073 }
3074
3075 /**
3076 * xmlRemoveRef:
3077 * @doc: the document
3078 * @attr: the attribute
3079 *
3080 * Remove the given attribute from the Ref table maintained internally.
3081 *
3082 * Returns -1 if the lookup failed and 0 otherwise
3083 */
3084 int
xmlRemoveRef(xmlDocPtr doc,xmlAttrPtr attr)3085 xmlRemoveRef(xmlDocPtr doc, xmlAttrPtr attr) {
3086 xmlListPtr ref_list;
3087 xmlRefTablePtr table;
3088 xmlChar *ID;
3089 xmlRemoveMemo target;
3090
3091 if (doc == NULL) return(-1);
3092 if (attr == NULL) return(-1);
3093
3094 table = (xmlRefTablePtr) doc->refs;
3095 if (table == NULL)
3096 return(-1);
3097
3098 ID = xmlNodeListGetString(doc, attr->children, 1);
3099 if (ID == NULL)
3100 return(-1);
3101
3102 ref_list = xmlHashLookup(table, ID);
3103 if(ref_list == NULL) {
3104 xmlFree(ID);
3105 return (-1);
3106 }
3107
3108 /* At this point, ref_list refers to a list of references which
3109 * have the same key as the supplied attr. Our list of references
3110 * is ordered by reference address and we don't have that information
3111 * here to use when removing. We'll have to walk the list and
3112 * check for a matching attribute, when we find one stop the walk
3113 * and remove the entry.
3114 * The list is ordered by reference, so that means we don't have the
3115 * key. Passing the list and the reference to the walker means we
3116 * will have enough data to be able to remove the entry.
3117 */
3118 target.l = ref_list;
3119 target.ap = attr;
3120
3121 /* Remove the supplied attr from our list */
3122 xmlListWalk(ref_list, xmlWalkRemoveRef, &target);
3123
3124 /*If the list is empty then remove the list entry in the hash */
3125 if (xmlListEmpty(ref_list))
3126 xmlHashUpdateEntry(table, ID, NULL, xmlFreeRefTableEntry);
3127 xmlFree(ID);
3128 return(0);
3129 }
3130
3131 /**
3132 * xmlGetRefs:
3133 * @doc: pointer to the document
3134 * @ID: the ID value
3135 *
3136 * Find the set of references for the supplied ID.
3137 *
3138 * Returns NULL if not found, otherwise node set for the ID.
3139 */
3140 xmlListPtr
xmlGetRefs(xmlDocPtr doc,const xmlChar * ID)3141 xmlGetRefs(xmlDocPtr doc, const xmlChar *ID) {
3142 xmlRefTablePtr table;
3143
3144 if (doc == NULL) {
3145 return(NULL);
3146 }
3147
3148 if (ID == NULL) {
3149 return(NULL);
3150 }
3151
3152 table = (xmlRefTablePtr) doc->refs;
3153 if (table == NULL)
3154 return(NULL);
3155
3156 return (xmlHashLookup(table, ID));
3157 }
3158
3159 /************************************************************************
3160 * *
3161 * Routines for validity checking *
3162 * *
3163 ************************************************************************/
3164
3165 /**
3166 * xmlGetDtdElementDesc:
3167 * @dtd: a pointer to the DtD to search
3168 * @name: the element name
3169 *
3170 * Search the DTD for the description of this element
3171 *
3172 * returns the xmlElementPtr if found or NULL
3173 */
3174
3175 xmlElementPtr
xmlGetDtdElementDesc(xmlDtdPtr dtd,const xmlChar * name)3176 xmlGetDtdElementDesc(xmlDtdPtr dtd, const xmlChar *name) {
3177 xmlElementTablePtr table;
3178 xmlElementPtr cur;
3179 xmlChar *uqname = NULL, *prefix = NULL;
3180
3181 if ((dtd == NULL) || (name == NULL)) return(NULL);
3182 if (dtd->elements == NULL)
3183 return(NULL);
3184 table = (xmlElementTablePtr) dtd->elements;
3185
3186 uqname = xmlSplitQName2(name, &prefix);
3187 if (uqname != NULL)
3188 name = uqname;
3189 cur = xmlHashLookup2(table, name, prefix);
3190 if (prefix != NULL) xmlFree(prefix);
3191 if (uqname != NULL) xmlFree(uqname);
3192 return(cur);
3193 }
3194 /**
3195 * xmlGetDtdElementDesc2:
3196 * @dtd: a pointer to the DtD to search
3197 * @name: the element name
3198 * @create: create an empty description if not found
3199 *
3200 * Search the DTD for the description of this element
3201 *
3202 * returns the xmlElementPtr if found or NULL
3203 */
3204
3205 static xmlElementPtr
xmlGetDtdElementDesc2(xmlDtdPtr dtd,const xmlChar * name,int create)3206 xmlGetDtdElementDesc2(xmlDtdPtr dtd, const xmlChar *name, int create) {
3207 xmlElementTablePtr table;
3208 xmlElementPtr cur;
3209 xmlChar *uqname = NULL, *prefix = NULL;
3210
3211 if (dtd == NULL) return(NULL);
3212 if (dtd->elements == NULL) {
3213 xmlDictPtr dict = NULL;
3214
3215 if (dtd->doc != NULL)
3216 dict = dtd->doc->dict;
3217
3218 if (!create)
3219 return(NULL);
3220 /*
3221 * Create the Element table if needed.
3222 */
3223 table = (xmlElementTablePtr) dtd->elements;
3224 if (table == NULL) {
3225 table = xmlHashCreateDict(0, dict);
3226 dtd->elements = (void *) table;
3227 }
3228 if (table == NULL) {
3229 xmlVErrMemory(NULL, "element table allocation failed");
3230 return(NULL);
3231 }
3232 }
3233 table = (xmlElementTablePtr) dtd->elements;
3234
3235 uqname = xmlSplitQName2(name, &prefix);
3236 if (uqname != NULL)
3237 name = uqname;
3238 cur = xmlHashLookup2(table, name, prefix);
3239 if ((cur == NULL) && (create)) {
3240 cur = (xmlElementPtr) xmlMalloc(sizeof(xmlElement));
3241 if (cur == NULL) {
3242 xmlVErrMemory(NULL, "malloc failed");
3243 return(NULL);
3244 }
3245 memset(cur, 0, sizeof(xmlElement));
3246 cur->type = XML_ELEMENT_DECL;
3247
3248 /*
3249 * fill the structure.
3250 */
3251 cur->name = xmlStrdup(name);
3252 cur->prefix = xmlStrdup(prefix);
3253 cur->etype = XML_ELEMENT_TYPE_UNDEFINED;
3254
3255 xmlHashAddEntry2(table, name, prefix, cur);
3256 }
3257 if (prefix != NULL) xmlFree(prefix);
3258 if (uqname != NULL) xmlFree(uqname);
3259 return(cur);
3260 }
3261
3262 /**
3263 * xmlGetDtdQElementDesc:
3264 * @dtd: a pointer to the DtD to search
3265 * @name: the element name
3266 * @prefix: the element namespace prefix
3267 *
3268 * Search the DTD for the description of this element
3269 *
3270 * returns the xmlElementPtr if found or NULL
3271 */
3272
3273 xmlElementPtr
xmlGetDtdQElementDesc(xmlDtdPtr dtd,const xmlChar * name,const xmlChar * prefix)3274 xmlGetDtdQElementDesc(xmlDtdPtr dtd, const xmlChar *name,
3275 const xmlChar *prefix) {
3276 xmlElementTablePtr table;
3277
3278 if (dtd == NULL) return(NULL);
3279 if (dtd->elements == NULL) return(NULL);
3280 table = (xmlElementTablePtr) dtd->elements;
3281
3282 return(xmlHashLookup2(table, name, prefix));
3283 }
3284
3285 /**
3286 * xmlGetDtdAttrDesc:
3287 * @dtd: a pointer to the DtD to search
3288 * @elem: the element name
3289 * @name: the attribute name
3290 *
3291 * Search the DTD for the description of this attribute on
3292 * this element.
3293 *
3294 * returns the xmlAttributePtr if found or NULL
3295 */
3296
3297 xmlAttributePtr
xmlGetDtdAttrDesc(xmlDtdPtr dtd,const xmlChar * elem,const xmlChar * name)3298 xmlGetDtdAttrDesc(xmlDtdPtr dtd, const xmlChar *elem, const xmlChar *name) {
3299 xmlAttributeTablePtr table;
3300 xmlAttributePtr cur;
3301 xmlChar *uqname = NULL, *prefix = NULL;
3302
3303 if (dtd == NULL) return(NULL);
3304 if (dtd->attributes == NULL) return(NULL);
3305
3306 table = (xmlAttributeTablePtr) dtd->attributes;
3307 if (table == NULL)
3308 return(NULL);
3309
3310 uqname = xmlSplitQName2(name, &prefix);
3311
3312 if (uqname != NULL) {
3313 cur = xmlHashLookup3(table, uqname, prefix, elem);
3314 if (prefix != NULL) xmlFree(prefix);
3315 if (uqname != NULL) xmlFree(uqname);
3316 } else
3317 cur = xmlHashLookup3(table, name, NULL, elem);
3318 return(cur);
3319 }
3320
3321 /**
3322 * xmlGetDtdQAttrDesc:
3323 * @dtd: a pointer to the DtD to search
3324 * @elem: the element name
3325 * @name: the attribute name
3326 * @prefix: the attribute namespace prefix
3327 *
3328 * Search the DTD for the description of this qualified attribute on
3329 * this element.
3330 *
3331 * returns the xmlAttributePtr if found or NULL
3332 */
3333
3334 xmlAttributePtr
xmlGetDtdQAttrDesc(xmlDtdPtr dtd,const xmlChar * elem,const xmlChar * name,const xmlChar * prefix)3335 xmlGetDtdQAttrDesc(xmlDtdPtr dtd, const xmlChar *elem, const xmlChar *name,
3336 const xmlChar *prefix) {
3337 xmlAttributeTablePtr table;
3338
3339 if (dtd == NULL) return(NULL);
3340 if (dtd->attributes == NULL) return(NULL);
3341 table = (xmlAttributeTablePtr) dtd->attributes;
3342
3343 return(xmlHashLookup3(table, name, prefix, elem));
3344 }
3345
3346 /**
3347 * xmlGetDtdNotationDesc:
3348 * @dtd: a pointer to the DtD to search
3349 * @name: the notation name
3350 *
3351 * Search the DTD for the description of this notation
3352 *
3353 * returns the xmlNotationPtr if found or NULL
3354 */
3355
3356 xmlNotationPtr
xmlGetDtdNotationDesc(xmlDtdPtr dtd,const xmlChar * name)3357 xmlGetDtdNotationDesc(xmlDtdPtr dtd, const xmlChar *name) {
3358 xmlNotationTablePtr table;
3359
3360 if (dtd == NULL) return(NULL);
3361 if (dtd->notations == NULL) return(NULL);
3362 table = (xmlNotationTablePtr) dtd->notations;
3363
3364 return(xmlHashLookup(table, name));
3365 }
3366
3367 #if defined(LIBXML_VALID_ENABLED) || defined(LIBXML_SCHEMAS_ENABLED)
3368 /**
3369 * xmlValidateNotationUse:
3370 * @ctxt: the validation context
3371 * @doc: the document
3372 * @notationName: the notation name to check
3373 *
3374 * Validate that the given name match a notation declaration.
3375 * - [ VC: Notation Declared ]
3376 *
3377 * returns 1 if valid or 0 otherwise
3378 */
3379
3380 int
xmlValidateNotationUse(xmlValidCtxtPtr ctxt,xmlDocPtr doc,const xmlChar * notationName)3381 xmlValidateNotationUse(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
3382 const xmlChar *notationName) {
3383 xmlNotationPtr notaDecl;
3384 if ((doc == NULL) || (doc->intSubset == NULL) ||
3385 (notationName == NULL)) return(-1);
3386
3387 notaDecl = xmlGetDtdNotationDesc(doc->intSubset, notationName);
3388 if ((notaDecl == NULL) && (doc->extSubset != NULL))
3389 notaDecl = xmlGetDtdNotationDesc(doc->extSubset, notationName);
3390
3391 if ((notaDecl == NULL) && (ctxt != NULL)) {
3392 xmlErrValidNode(ctxt, (xmlNodePtr) doc, XML_DTD_UNKNOWN_NOTATION,
3393 "NOTATION %s is not declared\n",
3394 notationName, NULL, NULL);
3395 return(0);
3396 }
3397 return(1);
3398 }
3399 #endif /* LIBXML_VALID_ENABLED or LIBXML_SCHEMAS_ENABLED */
3400
3401 /**
3402 * xmlIsMixedElement:
3403 * @doc: the document
3404 * @name: the element name
3405 *
3406 * Search in the DtDs whether an element accept Mixed content (or ANY)
3407 * basically if it is supposed to accept text childs
3408 *
3409 * returns 0 if no, 1 if yes, and -1 if no element description is available
3410 */
3411
3412 int
xmlIsMixedElement(xmlDocPtr doc,const xmlChar * name)3413 xmlIsMixedElement(xmlDocPtr doc, const xmlChar *name) {
3414 xmlElementPtr elemDecl;
3415
3416 if ((doc == NULL) || (doc->intSubset == NULL)) return(-1);
3417
3418 elemDecl = xmlGetDtdElementDesc(doc->intSubset, name);
3419 if ((elemDecl == NULL) && (doc->extSubset != NULL))
3420 elemDecl = xmlGetDtdElementDesc(doc->extSubset, name);
3421 if (elemDecl == NULL) return(-1);
3422 switch (elemDecl->etype) {
3423 case XML_ELEMENT_TYPE_UNDEFINED:
3424 return(-1);
3425 case XML_ELEMENT_TYPE_ELEMENT:
3426 return(0);
3427 case XML_ELEMENT_TYPE_EMPTY:
3428 /*
3429 * return 1 for EMPTY since we want VC error to pop up
3430 * on <empty> </empty> for example
3431 */
3432 case XML_ELEMENT_TYPE_ANY:
3433 case XML_ELEMENT_TYPE_MIXED:
3434 return(1);
3435 }
3436 return(1);
3437 }
3438
3439 #ifdef LIBXML_VALID_ENABLED
3440
3441 static int
xmlIsDocNameStartChar(xmlDocPtr doc,int c)3442 xmlIsDocNameStartChar(xmlDocPtr doc, int c) {
3443 if ((doc == NULL) || (doc->properties & XML_DOC_OLD10) == 0) {
3444 /*
3445 * Use the new checks of production [4] [4a] amd [5] of the
3446 * Update 5 of XML-1.0
3447 */
3448 if (((c >= 'a') && (c <= 'z')) ||
3449 ((c >= 'A') && (c <= 'Z')) ||
3450 (c == '_') || (c == ':') ||
3451 ((c >= 0xC0) && (c <= 0xD6)) ||
3452 ((c >= 0xD8) && (c <= 0xF6)) ||
3453 ((c >= 0xF8) && (c <= 0x2FF)) ||
3454 ((c >= 0x370) && (c <= 0x37D)) ||
3455 ((c >= 0x37F) && (c <= 0x1FFF)) ||
3456 ((c >= 0x200C) && (c <= 0x200D)) ||
3457 ((c >= 0x2070) && (c <= 0x218F)) ||
3458 ((c >= 0x2C00) && (c <= 0x2FEF)) ||
3459 ((c >= 0x3001) && (c <= 0xD7FF)) ||
3460 ((c >= 0xF900) && (c <= 0xFDCF)) ||
3461 ((c >= 0xFDF0) && (c <= 0xFFFD)) ||
3462 ((c >= 0x10000) && (c <= 0xEFFFF)))
3463 return(1);
3464 } else {
3465 if (IS_LETTER(c) || (c == '_') || (c == ':'))
3466 return(1);
3467 }
3468 return(0);
3469 }
3470
3471 static int
xmlIsDocNameChar(xmlDocPtr doc,int c)3472 xmlIsDocNameChar(xmlDocPtr doc, int c) {
3473 if ((doc == NULL) || (doc->properties & XML_DOC_OLD10) == 0) {
3474 /*
3475 * Use the new checks of production [4] [4a] amd [5] of the
3476 * Update 5 of XML-1.0
3477 */
3478 if (((c >= 'a') && (c <= 'z')) ||
3479 ((c >= 'A') && (c <= 'Z')) ||
3480 ((c >= '0') && (c <= '9')) || /* !start */
3481 (c == '_') || (c == ':') ||
3482 (c == '-') || (c == '.') || (c == 0xB7) || /* !start */
3483 ((c >= 0xC0) && (c <= 0xD6)) ||
3484 ((c >= 0xD8) && (c <= 0xF6)) ||
3485 ((c >= 0xF8) && (c <= 0x2FF)) ||
3486 ((c >= 0x300) && (c <= 0x36F)) || /* !start */
3487 ((c >= 0x370) && (c <= 0x37D)) ||
3488 ((c >= 0x37F) && (c <= 0x1FFF)) ||
3489 ((c >= 0x200C) && (c <= 0x200D)) ||
3490 ((c >= 0x203F) && (c <= 0x2040)) || /* !start */
3491 ((c >= 0x2070) && (c <= 0x218F)) ||
3492 ((c >= 0x2C00) && (c <= 0x2FEF)) ||
3493 ((c >= 0x3001) && (c <= 0xD7FF)) ||
3494 ((c >= 0xF900) && (c <= 0xFDCF)) ||
3495 ((c >= 0xFDF0) && (c <= 0xFFFD)) ||
3496 ((c >= 0x10000) && (c <= 0xEFFFF)))
3497 return(1);
3498 } else {
3499 if ((IS_LETTER(c)) || (IS_DIGIT(c)) ||
3500 (c == '.') || (c == '-') ||
3501 (c == '_') || (c == ':') ||
3502 (IS_COMBINING(c)) ||
3503 (IS_EXTENDER(c)))
3504 return(1);
3505 }
3506 return(0);
3507 }
3508
3509 /**
3510 * xmlValidateNameValue:
3511 * @doc: pointer to the document or NULL
3512 * @value: an Name value
3513 *
3514 * Validate that the given value match Name production
3515 *
3516 * returns 1 if valid or 0 otherwise
3517 */
3518
3519 static int
xmlValidateNameValueInternal(xmlDocPtr doc,const xmlChar * value)3520 xmlValidateNameValueInternal(xmlDocPtr doc, const xmlChar *value) {
3521 const xmlChar *cur;
3522 int val, len;
3523
3524 if (value == NULL) return(0);
3525 cur = value;
3526 val = xmlStringCurrentChar(NULL, cur, &len);
3527 cur += len;
3528 if (!xmlIsDocNameStartChar(doc, val))
3529 return(0);
3530
3531 val = xmlStringCurrentChar(NULL, cur, &len);
3532 cur += len;
3533 while (xmlIsDocNameChar(doc, val)) {
3534 val = xmlStringCurrentChar(NULL, cur, &len);
3535 cur += len;
3536 }
3537
3538 if (val != 0) return(0);
3539
3540 return(1);
3541 }
3542
3543 /**
3544 * xmlValidateNameValue:
3545 * @value: an Name value
3546 *
3547 * Validate that the given value match Name production
3548 *
3549 * returns 1 if valid or 0 otherwise
3550 */
3551
3552 int
xmlValidateNameValue(const xmlChar * value)3553 xmlValidateNameValue(const xmlChar *value) {
3554 return(xmlValidateNameValueInternal(NULL, value));
3555 }
3556
3557 /**
3558 * xmlValidateNamesValueInternal:
3559 * @doc: pointer to the document or NULL
3560 * @value: an Names value
3561 *
3562 * Validate that the given value match Names production
3563 *
3564 * returns 1 if valid or 0 otherwise
3565 */
3566
3567 static int
xmlValidateNamesValueInternal(xmlDocPtr doc,const xmlChar * value)3568 xmlValidateNamesValueInternal(xmlDocPtr doc, const xmlChar *value) {
3569 const xmlChar *cur;
3570 int val, len;
3571
3572 if (value == NULL) return(0);
3573 cur = value;
3574 val = xmlStringCurrentChar(NULL, cur, &len);
3575 cur += len;
3576
3577 if (!xmlIsDocNameStartChar(doc, val))
3578 return(0);
3579
3580 val = xmlStringCurrentChar(NULL, cur, &len);
3581 cur += len;
3582 while (xmlIsDocNameChar(doc, val)) {
3583 val = xmlStringCurrentChar(NULL, cur, &len);
3584 cur += len;
3585 }
3586
3587 /* Should not test IS_BLANK(val) here -- see erratum E20*/
3588 while (val == 0x20) {
3589 while (val == 0x20) {
3590 val = xmlStringCurrentChar(NULL, cur, &len);
3591 cur += len;
3592 }
3593
3594 if (!xmlIsDocNameStartChar(doc, val))
3595 return(0);
3596
3597 val = xmlStringCurrentChar(NULL, cur, &len);
3598 cur += len;
3599
3600 while (xmlIsDocNameChar(doc, val)) {
3601 val = xmlStringCurrentChar(NULL, cur, &len);
3602 cur += len;
3603 }
3604 }
3605
3606 if (val != 0) return(0);
3607
3608 return(1);
3609 }
3610
3611 /**
3612 * xmlValidateNamesValue:
3613 * @value: an Names value
3614 *
3615 * Validate that the given value match Names production
3616 *
3617 * returns 1 if valid or 0 otherwise
3618 */
3619
3620 int
xmlValidateNamesValue(const xmlChar * value)3621 xmlValidateNamesValue(const xmlChar *value) {
3622 return(xmlValidateNamesValueInternal(NULL, value));
3623 }
3624
3625 /**
3626 * xmlValidateNmtokenValueInternal:
3627 * @doc: pointer to the document or NULL
3628 * @value: an Nmtoken value
3629 *
3630 * Validate that the given value match Nmtoken production
3631 *
3632 * [ VC: Name Token ]
3633 *
3634 * returns 1 if valid or 0 otherwise
3635 */
3636
3637 static int
xmlValidateNmtokenValueInternal(xmlDocPtr doc,const xmlChar * value)3638 xmlValidateNmtokenValueInternal(xmlDocPtr doc, const xmlChar *value) {
3639 const xmlChar *cur;
3640 int val, len;
3641
3642 if (value == NULL) return(0);
3643 cur = value;
3644 val = xmlStringCurrentChar(NULL, cur, &len);
3645 cur += len;
3646
3647 if (!xmlIsDocNameChar(doc, val))
3648 return(0);
3649
3650 val = xmlStringCurrentChar(NULL, cur, &len);
3651 cur += len;
3652 while (xmlIsDocNameChar(doc, val)) {
3653 val = xmlStringCurrentChar(NULL, cur, &len);
3654 cur += len;
3655 }
3656
3657 if (val != 0) return(0);
3658
3659 return(1);
3660 }
3661
3662 /**
3663 * xmlValidateNmtokenValue:
3664 * @value: an Nmtoken value
3665 *
3666 * Validate that the given value match Nmtoken production
3667 *
3668 * [ VC: Name Token ]
3669 *
3670 * returns 1 if valid or 0 otherwise
3671 */
3672
3673 int
xmlValidateNmtokenValue(const xmlChar * value)3674 xmlValidateNmtokenValue(const xmlChar *value) {
3675 return(xmlValidateNmtokenValueInternal(NULL, value));
3676 }
3677
3678 /**
3679 * xmlValidateNmtokensValueInternal:
3680 * @doc: pointer to the document or NULL
3681 * @value: an Nmtokens value
3682 *
3683 * Validate that the given value match Nmtokens production
3684 *
3685 * [ VC: Name Token ]
3686 *
3687 * returns 1 if valid or 0 otherwise
3688 */
3689
3690 static int
xmlValidateNmtokensValueInternal(xmlDocPtr doc,const xmlChar * value)3691 xmlValidateNmtokensValueInternal(xmlDocPtr doc, const xmlChar *value) {
3692 const xmlChar *cur;
3693 int val, len;
3694
3695 if (value == NULL) return(0);
3696 cur = value;
3697 val = xmlStringCurrentChar(NULL, cur, &len);
3698 cur += len;
3699
3700 while (IS_BLANK(val)) {
3701 val = xmlStringCurrentChar(NULL, cur, &len);
3702 cur += len;
3703 }
3704
3705 if (!xmlIsDocNameChar(doc, val))
3706 return(0);
3707
3708 while (xmlIsDocNameChar(doc, val)) {
3709 val = xmlStringCurrentChar(NULL, cur, &len);
3710 cur += len;
3711 }
3712
3713 /* Should not test IS_BLANK(val) here -- see erratum E20*/
3714 while (val == 0x20) {
3715 while (val == 0x20) {
3716 val = xmlStringCurrentChar(NULL, cur, &len);
3717 cur += len;
3718 }
3719 if (val == 0) return(1);
3720
3721 if (!xmlIsDocNameChar(doc, val))
3722 return(0);
3723
3724 val = xmlStringCurrentChar(NULL, cur, &len);
3725 cur += len;
3726
3727 while (xmlIsDocNameChar(doc, val)) {
3728 val = xmlStringCurrentChar(NULL, cur, &len);
3729 cur += len;
3730 }
3731 }
3732
3733 if (val != 0) return(0);
3734
3735 return(1);
3736 }
3737
3738 /**
3739 * xmlValidateNmtokensValue:
3740 * @value: an Nmtokens value
3741 *
3742 * Validate that the given value match Nmtokens production
3743 *
3744 * [ VC: Name Token ]
3745 *
3746 * returns 1 if valid or 0 otherwise
3747 */
3748
3749 int
xmlValidateNmtokensValue(const xmlChar * value)3750 xmlValidateNmtokensValue(const xmlChar *value) {
3751 return(xmlValidateNmtokensValueInternal(NULL, value));
3752 }
3753
3754 /**
3755 * xmlValidateNotationDecl:
3756 * @ctxt: the validation context
3757 * @doc: a document instance
3758 * @nota: a notation definition
3759 *
3760 * Try to validate a single notation definition
3761 * basically it does the following checks as described by the
3762 * XML-1.0 recommendation:
3763 * - it seems that no validity constraint exists on notation declarations
3764 * But this function get called anyway ...
3765 *
3766 * returns 1 if valid or 0 otherwise
3767 */
3768
3769 int
xmlValidateNotationDecl(xmlValidCtxtPtr ctxt ATTRIBUTE_UNUSED,xmlDocPtr doc ATTRIBUTE_UNUSED,xmlNotationPtr nota ATTRIBUTE_UNUSED)3770 xmlValidateNotationDecl(xmlValidCtxtPtr ctxt ATTRIBUTE_UNUSED, xmlDocPtr doc ATTRIBUTE_UNUSED,
3771 xmlNotationPtr nota ATTRIBUTE_UNUSED) {
3772 int ret = 1;
3773
3774 return(ret);
3775 }
3776
3777 /**
3778 * xmlValidateAttributeValueInternal:
3779 * @doc: the document
3780 * @type: an attribute type
3781 * @value: an attribute value
3782 *
3783 * Validate that the given attribute value match the proper production
3784 *
3785 * returns 1 if valid or 0 otherwise
3786 */
3787
3788 static int
xmlValidateAttributeValueInternal(xmlDocPtr doc,xmlAttributeType type,const xmlChar * value)3789 xmlValidateAttributeValueInternal(xmlDocPtr doc, xmlAttributeType type,
3790 const xmlChar *value) {
3791 switch (type) {
3792 case XML_ATTRIBUTE_ENTITIES:
3793 case XML_ATTRIBUTE_IDREFS:
3794 return(xmlValidateNamesValueInternal(doc, value));
3795 case XML_ATTRIBUTE_ENTITY:
3796 case XML_ATTRIBUTE_IDREF:
3797 case XML_ATTRIBUTE_ID:
3798 case XML_ATTRIBUTE_NOTATION:
3799 return(xmlValidateNameValueInternal(doc, value));
3800 case XML_ATTRIBUTE_NMTOKENS:
3801 case XML_ATTRIBUTE_ENUMERATION:
3802 return(xmlValidateNmtokensValueInternal(doc, value));
3803 case XML_ATTRIBUTE_NMTOKEN:
3804 return(xmlValidateNmtokenValueInternal(doc, value));
3805 case XML_ATTRIBUTE_CDATA:
3806 break;
3807 }
3808 return(1);
3809 }
3810
3811 /**
3812 * xmlValidateAttributeValue:
3813 * @type: an attribute type
3814 * @value: an attribute value
3815 *
3816 * Validate that the given attribute value match the proper production
3817 *
3818 * [ VC: ID ]
3819 * Values of type ID must match the Name production....
3820 *
3821 * [ VC: IDREF ]
3822 * Values of type IDREF must match the Name production, and values
3823 * of type IDREFS must match Names ...
3824 *
3825 * [ VC: Entity Name ]
3826 * Values of type ENTITY must match the Name production, values
3827 * of type ENTITIES must match Names ...
3828 *
3829 * [ VC: Name Token ]
3830 * Values of type NMTOKEN must match the Nmtoken production; values
3831 * of type NMTOKENS must match Nmtokens.
3832 *
3833 * returns 1 if valid or 0 otherwise
3834 */
3835 int
xmlValidateAttributeValue(xmlAttributeType type,const xmlChar * value)3836 xmlValidateAttributeValue(xmlAttributeType type, const xmlChar *value) {
3837 return(xmlValidateAttributeValueInternal(NULL, type, value));
3838 }
3839
3840 /**
3841 * xmlValidateAttributeValue2:
3842 * @ctxt: the validation context
3843 * @doc: the document
3844 * @name: the attribute name (used for error reporting only)
3845 * @type: the attribute type
3846 * @value: the attribute value
3847 *
3848 * Validate that the given attribute value match a given type.
3849 * This typically cannot be done before having finished parsing
3850 * the subsets.
3851 *
3852 * [ VC: IDREF ]
3853 * Values of type IDREF must match one of the declared IDs
3854 * Values of type IDREFS must match a sequence of the declared IDs
3855 * each Name must match the value of an ID attribute on some element
3856 * in the XML document; i.e. IDREF values must match the value of
3857 * some ID attribute
3858 *
3859 * [ VC: Entity Name ]
3860 * Values of type ENTITY must match one declared entity
3861 * Values of type ENTITIES must match a sequence of declared entities
3862 *
3863 * [ VC: Notation Attributes ]
3864 * all notation names in the declaration must be declared.
3865 *
3866 * returns 1 if valid or 0 otherwise
3867 */
3868
3869 static int
xmlValidateAttributeValue2(xmlValidCtxtPtr ctxt,xmlDocPtr doc,const xmlChar * name,xmlAttributeType type,const xmlChar * value)3870 xmlValidateAttributeValue2(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
3871 const xmlChar *name, xmlAttributeType type, const xmlChar *value) {
3872 int ret = 1;
3873 switch (type) {
3874 case XML_ATTRIBUTE_IDREFS:
3875 case XML_ATTRIBUTE_IDREF:
3876 case XML_ATTRIBUTE_ID:
3877 case XML_ATTRIBUTE_NMTOKENS:
3878 case XML_ATTRIBUTE_ENUMERATION:
3879 case XML_ATTRIBUTE_NMTOKEN:
3880 case XML_ATTRIBUTE_CDATA:
3881 break;
3882 case XML_ATTRIBUTE_ENTITY: {
3883 xmlEntityPtr ent;
3884
3885 ent = xmlGetDocEntity(doc, value);
3886 /* yeah it's a bit messy... */
3887 if ((ent == NULL) && (doc->standalone == 1)) {
3888 doc->standalone = 0;
3889 ent = xmlGetDocEntity(doc, value);
3890 }
3891 if (ent == NULL) {
3892 xmlErrValidNode(ctxt, (xmlNodePtr) doc,
3893 XML_DTD_UNKNOWN_ENTITY,
3894 "ENTITY attribute %s reference an unknown entity \"%s\"\n",
3895 name, value, NULL);
3896 ret = 0;
3897 } else if (ent->etype != XML_EXTERNAL_GENERAL_UNPARSED_ENTITY) {
3898 xmlErrValidNode(ctxt, (xmlNodePtr) doc,
3899 XML_DTD_ENTITY_TYPE,
3900 "ENTITY attribute %s reference an entity \"%s\" of wrong type\n",
3901 name, value, NULL);
3902 ret = 0;
3903 }
3904 break;
3905 }
3906 case XML_ATTRIBUTE_ENTITIES: {
3907 xmlChar *dup, *nam = NULL, *cur, save;
3908 xmlEntityPtr ent;
3909
3910 dup = xmlStrdup(value);
3911 if (dup == NULL)
3912 return(0);
3913 cur = dup;
3914 while (*cur != 0) {
3915 nam = cur;
3916 while ((*cur != 0) && (!IS_BLANK_CH(*cur))) cur++;
3917 save = *cur;
3918 *cur = 0;
3919 ent = xmlGetDocEntity(doc, nam);
3920 if (ent == NULL) {
3921 xmlErrValidNode(ctxt, (xmlNodePtr) doc,
3922 XML_DTD_UNKNOWN_ENTITY,
3923 "ENTITIES attribute %s reference an unknown entity \"%s\"\n",
3924 name, nam, NULL);
3925 ret = 0;
3926 } else if (ent->etype != XML_EXTERNAL_GENERAL_UNPARSED_ENTITY) {
3927 xmlErrValidNode(ctxt, (xmlNodePtr) doc,
3928 XML_DTD_ENTITY_TYPE,
3929 "ENTITIES attribute %s reference an entity \"%s\" of wrong type\n",
3930 name, nam, NULL);
3931 ret = 0;
3932 }
3933 if (save == 0)
3934 break;
3935 *cur = save;
3936 while (IS_BLANK_CH(*cur)) cur++;
3937 }
3938 xmlFree(dup);
3939 break;
3940 }
3941 case XML_ATTRIBUTE_NOTATION: {
3942 xmlNotationPtr nota;
3943
3944 nota = xmlGetDtdNotationDesc(doc->intSubset, value);
3945 if ((nota == NULL) && (doc->extSubset != NULL))
3946 nota = xmlGetDtdNotationDesc(doc->extSubset, value);
3947
3948 if (nota == NULL) {
3949 xmlErrValidNode(ctxt, (xmlNodePtr) doc,
3950 XML_DTD_UNKNOWN_NOTATION,
3951 "NOTATION attribute %s reference an unknown notation \"%s\"\n",
3952 name, value, NULL);
3953 ret = 0;
3954 }
3955 break;
3956 }
3957 }
3958 return(ret);
3959 }
3960
3961 /**
3962 * xmlValidCtxtNormalizeAttributeValue:
3963 * @ctxt: the validation context
3964 * @doc: the document
3965 * @elem: the parent
3966 * @name: the attribute name
3967 * @value: the attribute value
3968 * @ctxt: the validation context or NULL
3969 *
3970 * Does the validation related extra step of the normalization of attribute
3971 * values:
3972 *
3973 * If the declared value is not CDATA, then the XML processor must further
3974 * process the normalized attribute value by discarding any leading and
3975 * trailing space (#x20) characters, and by replacing sequences of space
3976 * (#x20) characters by single space (#x20) character.
3977 *
3978 * Also check VC: Standalone Document Declaration in P32, and update
3979 * ctxt->valid accordingly
3980 *
3981 * returns a new normalized string if normalization is needed, NULL otherwise
3982 * the caller must free the returned value.
3983 */
3984
3985 xmlChar *
xmlValidCtxtNormalizeAttributeValue(xmlValidCtxtPtr ctxt,xmlDocPtr doc,xmlNodePtr elem,const xmlChar * name,const xmlChar * value)3986 xmlValidCtxtNormalizeAttributeValue(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
3987 xmlNodePtr elem, const xmlChar *name, const xmlChar *value) {
3988 xmlChar *ret, *dst;
3989 const xmlChar *src;
3990 xmlAttributePtr attrDecl = NULL;
3991 int extsubset = 0;
3992
3993 if (doc == NULL) return(NULL);
3994 if (elem == NULL) return(NULL);
3995 if (name == NULL) return(NULL);
3996 if (value == NULL) return(NULL);
3997
3998 if ((elem->ns != NULL) && (elem->ns->prefix != NULL)) {
3999 xmlChar fn[50];
4000 xmlChar *fullname;
4001
4002 fullname = xmlBuildQName(elem->name, elem->ns->prefix, fn, 50);
4003 if (fullname == NULL)
4004 return(NULL);
4005 attrDecl = xmlGetDtdAttrDesc(doc->intSubset, fullname, name);
4006 if ((attrDecl == NULL) && (doc->extSubset != NULL)) {
4007 attrDecl = xmlGetDtdAttrDesc(doc->extSubset, fullname, name);
4008 if (attrDecl != NULL)
4009 extsubset = 1;
4010 }
4011 if ((fullname != fn) && (fullname != elem->name))
4012 xmlFree(fullname);
4013 }
4014 if ((attrDecl == NULL) && (doc->intSubset != NULL))
4015 attrDecl = xmlGetDtdAttrDesc(doc->intSubset, elem->name, name);
4016 if ((attrDecl == NULL) && (doc->extSubset != NULL)) {
4017 attrDecl = xmlGetDtdAttrDesc(doc->extSubset, elem->name, name);
4018 if (attrDecl != NULL)
4019 extsubset = 1;
4020 }
4021
4022 if (attrDecl == NULL)
4023 return(NULL);
4024 if (attrDecl->atype == XML_ATTRIBUTE_CDATA)
4025 return(NULL);
4026
4027 ret = xmlStrdup(value);
4028 if (ret == NULL)
4029 return(NULL);
4030 src = value;
4031 dst = ret;
4032 while (*src == 0x20) src++;
4033 while (*src != 0) {
4034 if (*src == 0x20) {
4035 while (*src == 0x20) src++;
4036 if (*src != 0)
4037 *dst++ = 0x20;
4038 } else {
4039 *dst++ = *src++;
4040 }
4041 }
4042 *dst = 0;
4043 if ((doc->standalone) && (extsubset == 1) && (!xmlStrEqual(value, ret))) {
4044 xmlErrValidNode(ctxt, elem, XML_DTD_NOT_STANDALONE,
4045 "standalone: %s on %s value had to be normalized based on external subset declaration\n",
4046 name, elem->name, NULL);
4047 ctxt->valid = 0;
4048 }
4049 return(ret);
4050 }
4051
4052 /**
4053 * xmlValidNormalizeAttributeValue:
4054 * @doc: the document
4055 * @elem: the parent
4056 * @name: the attribute name
4057 * @value: the attribute value
4058 *
4059 * Does the validation related extra step of the normalization of attribute
4060 * values:
4061 *
4062 * If the declared value is not CDATA, then the XML processor must further
4063 * process the normalized attribute value by discarding any leading and
4064 * trailing space (#x20) characters, and by replacing sequences of space
4065 * (#x20) characters by single space (#x20) character.
4066 *
4067 * Returns a new normalized string if normalization is needed, NULL otherwise
4068 * the caller must free the returned value.
4069 */
4070
4071 xmlChar *
xmlValidNormalizeAttributeValue(xmlDocPtr doc,xmlNodePtr elem,const xmlChar * name,const xmlChar * value)4072 xmlValidNormalizeAttributeValue(xmlDocPtr doc, xmlNodePtr elem,
4073 const xmlChar *name, const xmlChar *value) {
4074 xmlChar *ret, *dst;
4075 const xmlChar *src;
4076 xmlAttributePtr attrDecl = NULL;
4077
4078 if (doc == NULL) return(NULL);
4079 if (elem == NULL) return(NULL);
4080 if (name == NULL) return(NULL);
4081 if (value == NULL) return(NULL);
4082
4083 if ((elem->ns != NULL) && (elem->ns->prefix != NULL)) {
4084 xmlChar fn[50];
4085 xmlChar *fullname;
4086
4087 fullname = xmlBuildQName(elem->name, elem->ns->prefix, fn, 50);
4088 if (fullname == NULL)
4089 return(NULL);
4090 if ((fullname != fn) && (fullname != elem->name))
4091 xmlFree(fullname);
4092 }
4093 attrDecl = xmlGetDtdAttrDesc(doc->intSubset, elem->name, name);
4094 if ((attrDecl == NULL) && (doc->extSubset != NULL))
4095 attrDecl = xmlGetDtdAttrDesc(doc->extSubset, elem->name, name);
4096
4097 if (attrDecl == NULL)
4098 return(NULL);
4099 if (attrDecl->atype == XML_ATTRIBUTE_CDATA)
4100 return(NULL);
4101
4102 ret = xmlStrdup(value);
4103 if (ret == NULL)
4104 return(NULL);
4105 src = value;
4106 dst = ret;
4107 while (*src == 0x20) src++;
4108 while (*src != 0) {
4109 if (*src == 0x20) {
4110 while (*src == 0x20) src++;
4111 if (*src != 0)
4112 *dst++ = 0x20;
4113 } else {
4114 *dst++ = *src++;
4115 }
4116 }
4117 *dst = 0;
4118 return(ret);
4119 }
4120
4121 static void
xmlValidateAttributeIdCallback(void * payload,void * data,const xmlChar * name ATTRIBUTE_UNUSED)4122 xmlValidateAttributeIdCallback(void *payload, void *data,
4123 const xmlChar *name ATTRIBUTE_UNUSED) {
4124 xmlAttributePtr attr = (xmlAttributePtr) payload;
4125 int *count = (int *) data;
4126 if (attr->atype == XML_ATTRIBUTE_ID) (*count)++;
4127 }
4128
4129 /**
4130 * xmlValidateAttributeDecl:
4131 * @ctxt: the validation context
4132 * @doc: a document instance
4133 * @attr: an attribute definition
4134 *
4135 * Try to validate a single attribute definition
4136 * basically it does the following checks as described by the
4137 * XML-1.0 recommendation:
4138 * - [ VC: Attribute Default Legal ]
4139 * - [ VC: Enumeration ]
4140 * - [ VC: ID Attribute Default ]
4141 *
4142 * The ID/IDREF uniqueness and matching are done separately
4143 *
4144 * returns 1 if valid or 0 otherwise
4145 */
4146
4147 int
xmlValidateAttributeDecl(xmlValidCtxtPtr ctxt,xmlDocPtr doc,xmlAttributePtr attr)4148 xmlValidateAttributeDecl(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
4149 xmlAttributePtr attr) {
4150 int ret = 1;
4151 int val;
4152 CHECK_DTD;
4153 if(attr == NULL) return(1);
4154
4155 /* Attribute Default Legal */
4156 /* Enumeration */
4157 if (attr->defaultValue != NULL) {
4158 val = xmlValidateAttributeValueInternal(doc, attr->atype,
4159 attr->defaultValue);
4160 if (val == 0) {
4161 xmlErrValidNode(ctxt, (xmlNodePtr) attr, XML_DTD_ATTRIBUTE_DEFAULT,
4162 "Syntax of default value for attribute %s of %s is not valid\n",
4163 attr->name, attr->elem, NULL);
4164 }
4165 ret &= val;
4166 }
4167
4168 /* ID Attribute Default */
4169 if ((attr->atype == XML_ATTRIBUTE_ID)&&
4170 (attr->def != XML_ATTRIBUTE_IMPLIED) &&
4171 (attr->def != XML_ATTRIBUTE_REQUIRED)) {
4172 xmlErrValidNode(ctxt, (xmlNodePtr) attr, XML_DTD_ID_FIXED,
4173 "ID attribute %s of %s is not valid must be #IMPLIED or #REQUIRED\n",
4174 attr->name, attr->elem, NULL);
4175 ret = 0;
4176 }
4177
4178 /* One ID per Element Type */
4179 if (attr->atype == XML_ATTRIBUTE_ID) {
4180 int nbId;
4181
4182 /* the trick is that we parse DtD as their own internal subset */
4183 xmlElementPtr elem = xmlGetDtdElementDesc(doc->intSubset,
4184 attr->elem);
4185 if (elem != NULL) {
4186 nbId = xmlScanIDAttributeDecl(NULL, elem, 0);
4187 } else {
4188 xmlAttributeTablePtr table;
4189
4190 /*
4191 * The attribute may be declared in the internal subset and the
4192 * element in the external subset.
4193 */
4194 nbId = 0;
4195 if (doc->intSubset != NULL) {
4196 table = (xmlAttributeTablePtr) doc->intSubset->attributes;
4197 xmlHashScan3(table, NULL, NULL, attr->elem,
4198 xmlValidateAttributeIdCallback, &nbId);
4199 }
4200 }
4201 if (nbId > 1) {
4202
4203 xmlErrValidNodeNr(ctxt, (xmlNodePtr) attr, XML_DTD_ID_SUBSET,
4204 "Element %s has %d ID attribute defined in the internal subset : %s\n",
4205 attr->elem, nbId, attr->name);
4206 } else if (doc->extSubset != NULL) {
4207 int extId = 0;
4208 elem = xmlGetDtdElementDesc(doc->extSubset, attr->elem);
4209 if (elem != NULL) {
4210 extId = xmlScanIDAttributeDecl(NULL, elem, 0);
4211 }
4212 if (extId > 1) {
4213 xmlErrValidNodeNr(ctxt, (xmlNodePtr) attr, XML_DTD_ID_SUBSET,
4214 "Element %s has %d ID attribute defined in the external subset : %s\n",
4215 attr->elem, extId, attr->name);
4216 } else if (extId + nbId > 1) {
4217 xmlErrValidNode(ctxt, (xmlNodePtr) attr, XML_DTD_ID_SUBSET,
4218 "Element %s has ID attributes defined in the internal and external subset : %s\n",
4219 attr->elem, attr->name, NULL);
4220 }
4221 }
4222 }
4223
4224 /* Validity Constraint: Enumeration */
4225 if ((attr->defaultValue != NULL) && (attr->tree != NULL)) {
4226 xmlEnumerationPtr tree = attr->tree;
4227 while (tree != NULL) {
4228 if (xmlStrEqual(tree->name, attr->defaultValue)) break;
4229 tree = tree->next;
4230 }
4231 if (tree == NULL) {
4232 xmlErrValidNode(ctxt, (xmlNodePtr) attr, XML_DTD_ATTRIBUTE_VALUE,
4233 "Default value \"%s\" for attribute %s of %s is not among the enumerated set\n",
4234 attr->defaultValue, attr->name, attr->elem);
4235 ret = 0;
4236 }
4237 }
4238
4239 return(ret);
4240 }
4241
4242 /**
4243 * xmlValidateElementDecl:
4244 * @ctxt: the validation context
4245 * @doc: a document instance
4246 * @elem: an element definition
4247 *
4248 * Try to validate a single element definition
4249 * basically it does the following checks as described by the
4250 * XML-1.0 recommendation:
4251 * - [ VC: One ID per Element Type ]
4252 * - [ VC: No Duplicate Types ]
4253 * - [ VC: Unique Element Type Declaration ]
4254 *
4255 * returns 1 if valid or 0 otherwise
4256 */
4257
4258 int
xmlValidateElementDecl(xmlValidCtxtPtr ctxt,xmlDocPtr doc,xmlElementPtr elem)4259 xmlValidateElementDecl(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
4260 xmlElementPtr elem) {
4261 int ret = 1;
4262 xmlElementPtr tst;
4263
4264 CHECK_DTD;
4265
4266 if (elem == NULL) return(1);
4267
4268 #if 0
4269 #ifdef LIBXML_REGEXP_ENABLED
4270 /* Build the regexp associated to the content model */
4271 ret = xmlValidBuildContentModel(ctxt, elem);
4272 #endif
4273 #endif
4274
4275 /* No Duplicate Types */
4276 if (elem->etype == XML_ELEMENT_TYPE_MIXED) {
4277 xmlElementContentPtr cur, next;
4278 const xmlChar *name;
4279
4280 cur = elem->content;
4281 while (cur != NULL) {
4282 if (cur->type != XML_ELEMENT_CONTENT_OR) break;
4283 if (cur->c1 == NULL) break;
4284 if (cur->c1->type == XML_ELEMENT_CONTENT_ELEMENT) {
4285 name = cur->c1->name;
4286 next = cur->c2;
4287 while (next != NULL) {
4288 if (next->type == XML_ELEMENT_CONTENT_ELEMENT) {
4289 if ((xmlStrEqual(next->name, name)) &&
4290 (xmlStrEqual(next->prefix, cur->c1->prefix))) {
4291 if (cur->c1->prefix == NULL) {
4292 xmlErrValidNode(ctxt, (xmlNodePtr) elem, XML_DTD_CONTENT_ERROR,
4293 "Definition of %s has duplicate references of %s\n",
4294 elem->name, name, NULL);
4295 } else {
4296 xmlErrValidNode(ctxt, (xmlNodePtr) elem, XML_DTD_CONTENT_ERROR,
4297 "Definition of %s has duplicate references of %s:%s\n",
4298 elem->name, cur->c1->prefix, name);
4299 }
4300 ret = 0;
4301 }
4302 break;
4303 }
4304 if (next->c1 == NULL) break;
4305 if (next->c1->type != XML_ELEMENT_CONTENT_ELEMENT) break;
4306 if ((xmlStrEqual(next->c1->name, name)) &&
4307 (xmlStrEqual(next->c1->prefix, cur->c1->prefix))) {
4308 if (cur->c1->prefix == NULL) {
4309 xmlErrValidNode(ctxt, (xmlNodePtr) elem, XML_DTD_CONTENT_ERROR,
4310 "Definition of %s has duplicate references to %s\n",
4311 elem->name, name, NULL);
4312 } else {
4313 xmlErrValidNode(ctxt, (xmlNodePtr) elem, XML_DTD_CONTENT_ERROR,
4314 "Definition of %s has duplicate references to %s:%s\n",
4315 elem->name, cur->c1->prefix, name);
4316 }
4317 ret = 0;
4318 }
4319 next = next->c2;
4320 }
4321 }
4322 cur = cur->c2;
4323 }
4324 }
4325
4326 /* VC: Unique Element Type Declaration */
4327 tst = xmlGetDtdElementDesc(doc->intSubset, elem->name);
4328 if ((tst != NULL ) && (tst != elem) &&
4329 ((tst->prefix == elem->prefix) ||
4330 (xmlStrEqual(tst->prefix, elem->prefix))) &&
4331 (tst->etype != XML_ELEMENT_TYPE_UNDEFINED)) {
4332 xmlErrValidNode(ctxt, (xmlNodePtr) elem, XML_DTD_ELEM_REDEFINED,
4333 "Redefinition of element %s\n",
4334 elem->name, NULL, NULL);
4335 ret = 0;
4336 }
4337 tst = xmlGetDtdElementDesc(doc->extSubset, elem->name);
4338 if ((tst != NULL ) && (tst != elem) &&
4339 ((tst->prefix == elem->prefix) ||
4340 (xmlStrEqual(tst->prefix, elem->prefix))) &&
4341 (tst->etype != XML_ELEMENT_TYPE_UNDEFINED)) {
4342 xmlErrValidNode(ctxt, (xmlNodePtr) elem, XML_DTD_ELEM_REDEFINED,
4343 "Redefinition of element %s\n",
4344 elem->name, NULL, NULL);
4345 ret = 0;
4346 }
4347 /* One ID per Element Type
4348 * already done when registering the attribute
4349 if (xmlScanIDAttributeDecl(ctxt, elem) > 1) {
4350 ret = 0;
4351 } */
4352 return(ret);
4353 }
4354
4355 /**
4356 * xmlValidateOneAttribute:
4357 * @ctxt: the validation context
4358 * @doc: a document instance
4359 * @elem: an element instance
4360 * @attr: an attribute instance
4361 * @value: the attribute value (without entities processing)
4362 *
4363 * Try to validate a single attribute for an element
4364 * basically it does the following checks as described by the
4365 * XML-1.0 recommendation:
4366 * - [ VC: Attribute Value Type ]
4367 * - [ VC: Fixed Attribute Default ]
4368 * - [ VC: Entity Name ]
4369 * - [ VC: Name Token ]
4370 * - [ VC: ID ]
4371 * - [ VC: IDREF ]
4372 * - [ VC: Entity Name ]
4373 * - [ VC: Notation Attributes ]
4374 *
4375 * The ID/IDREF uniqueness and matching are done separately
4376 *
4377 * returns 1 if valid or 0 otherwise
4378 */
4379
4380 int
xmlValidateOneAttribute(xmlValidCtxtPtr ctxt,xmlDocPtr doc,xmlNodePtr elem,xmlAttrPtr attr,const xmlChar * value)4381 xmlValidateOneAttribute(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
4382 xmlNodePtr elem, xmlAttrPtr attr, const xmlChar *value)
4383 {
4384 xmlAttributePtr attrDecl = NULL;
4385 int val;
4386 int ret = 1;
4387
4388 CHECK_DTD;
4389 if ((elem == NULL) || (elem->name == NULL)) return(0);
4390 if ((attr == NULL) || (attr->name == NULL)) return(0);
4391
4392 if ((elem->ns != NULL) && (elem->ns->prefix != NULL)) {
4393 xmlChar fn[50];
4394 xmlChar *fullname;
4395
4396 fullname = xmlBuildQName(elem->name, elem->ns->prefix, fn, 50);
4397 if (fullname == NULL)
4398 return(0);
4399 if (attr->ns != NULL) {
4400 attrDecl = xmlGetDtdQAttrDesc(doc->intSubset, fullname,
4401 attr->name, attr->ns->prefix);
4402 if ((attrDecl == NULL) && (doc->extSubset != NULL))
4403 attrDecl = xmlGetDtdQAttrDesc(doc->extSubset, fullname,
4404 attr->name, attr->ns->prefix);
4405 } else {
4406 attrDecl = xmlGetDtdAttrDesc(doc->intSubset, fullname, attr->name);
4407 if ((attrDecl == NULL) && (doc->extSubset != NULL))
4408 attrDecl = xmlGetDtdAttrDesc(doc->extSubset,
4409 fullname, attr->name);
4410 }
4411 if ((fullname != fn) && (fullname != elem->name))
4412 xmlFree(fullname);
4413 }
4414 if (attrDecl == NULL) {
4415 if (attr->ns != NULL) {
4416 attrDecl = xmlGetDtdQAttrDesc(doc->intSubset, elem->name,
4417 attr->name, attr->ns->prefix);
4418 if ((attrDecl == NULL) && (doc->extSubset != NULL))
4419 attrDecl = xmlGetDtdQAttrDesc(doc->extSubset, elem->name,
4420 attr->name, attr->ns->prefix);
4421 } else {
4422 attrDecl = xmlGetDtdAttrDesc(doc->intSubset,
4423 elem->name, attr->name);
4424 if ((attrDecl == NULL) && (doc->extSubset != NULL))
4425 attrDecl = xmlGetDtdAttrDesc(doc->extSubset,
4426 elem->name, attr->name);
4427 }
4428 }
4429
4430
4431 /* Validity Constraint: Attribute Value Type */
4432 if (attrDecl == NULL) {
4433 xmlErrValidNode(ctxt, elem, XML_DTD_UNKNOWN_ATTRIBUTE,
4434 "No declaration for attribute %s of element %s\n",
4435 attr->name, elem->name, NULL);
4436 return(0);
4437 }
4438 attr->atype = attrDecl->atype;
4439
4440 val = xmlValidateAttributeValueInternal(doc, attrDecl->atype, value);
4441 if (val == 0) {
4442 xmlErrValidNode(ctxt, elem, XML_DTD_ATTRIBUTE_VALUE,
4443 "Syntax of value for attribute %s of %s is not valid\n",
4444 attr->name, elem->name, NULL);
4445 ret = 0;
4446 }
4447
4448 /* Validity constraint: Fixed Attribute Default */
4449 if (attrDecl->def == XML_ATTRIBUTE_FIXED) {
4450 if (!xmlStrEqual(value, attrDecl->defaultValue)) {
4451 xmlErrValidNode(ctxt, elem, XML_DTD_ATTRIBUTE_DEFAULT,
4452 "Value for attribute %s of %s is different from default \"%s\"\n",
4453 attr->name, elem->name, attrDecl->defaultValue);
4454 ret = 0;
4455 }
4456 }
4457
4458 /* Validity Constraint: ID uniqueness */
4459 if (attrDecl->atype == XML_ATTRIBUTE_ID) {
4460 if (xmlAddID(ctxt, doc, value, attr) == NULL)
4461 ret = 0;
4462 }
4463
4464 if ((attrDecl->atype == XML_ATTRIBUTE_IDREF) ||
4465 (attrDecl->atype == XML_ATTRIBUTE_IDREFS)) {
4466 if (xmlAddRef(ctxt, doc, value, attr) == NULL)
4467 ret = 0;
4468 }
4469
4470 /* Validity Constraint: Notation Attributes */
4471 if (attrDecl->atype == XML_ATTRIBUTE_NOTATION) {
4472 xmlEnumerationPtr tree = attrDecl->tree;
4473 xmlNotationPtr nota;
4474
4475 /* First check that the given NOTATION was declared */
4476 nota = xmlGetDtdNotationDesc(doc->intSubset, value);
4477 if (nota == NULL)
4478 nota = xmlGetDtdNotationDesc(doc->extSubset, value);
4479
4480 if (nota == NULL) {
4481 xmlErrValidNode(ctxt, elem, XML_DTD_UNKNOWN_NOTATION,
4482 "Value \"%s\" for attribute %s of %s is not a declared Notation\n",
4483 value, attr->name, elem->name);
4484 ret = 0;
4485 }
4486
4487 /* Second, verify that it's among the list */
4488 while (tree != NULL) {
4489 if (xmlStrEqual(tree->name, value)) break;
4490 tree = tree->next;
4491 }
4492 if (tree == NULL) {
4493 xmlErrValidNode(ctxt, elem, XML_DTD_NOTATION_VALUE,
4494 "Value \"%s\" for attribute %s of %s is not among the enumerated notations\n",
4495 value, attr->name, elem->name);
4496 ret = 0;
4497 }
4498 }
4499
4500 /* Validity Constraint: Enumeration */
4501 if (attrDecl->atype == XML_ATTRIBUTE_ENUMERATION) {
4502 xmlEnumerationPtr tree = attrDecl->tree;
4503 while (tree != NULL) {
4504 if (xmlStrEqual(tree->name, value)) break;
4505 tree = tree->next;
4506 }
4507 if (tree == NULL) {
4508 xmlErrValidNode(ctxt, elem, XML_DTD_ATTRIBUTE_VALUE,
4509 "Value \"%s\" for attribute %s of %s is not among the enumerated set\n",
4510 value, attr->name, elem->name);
4511 ret = 0;
4512 }
4513 }
4514
4515 /* Fixed Attribute Default */
4516 if ((attrDecl->def == XML_ATTRIBUTE_FIXED) &&
4517 (!xmlStrEqual(attrDecl->defaultValue, value))) {
4518 xmlErrValidNode(ctxt, elem, XML_DTD_ATTRIBUTE_VALUE,
4519 "Value for attribute %s of %s must be \"%s\"\n",
4520 attr->name, elem->name, attrDecl->defaultValue);
4521 ret = 0;
4522 }
4523
4524 /* Extra check for the attribute value */
4525 ret &= xmlValidateAttributeValue2(ctxt, doc, attr->name,
4526 attrDecl->atype, value);
4527
4528 return(ret);
4529 }
4530
4531 /**
4532 * xmlValidateOneNamespace:
4533 * @ctxt: the validation context
4534 * @doc: a document instance
4535 * @elem: an element instance
4536 * @prefix: the namespace prefix
4537 * @ns: an namespace declaration instance
4538 * @value: the attribute value (without entities processing)
4539 *
4540 * Try to validate a single namespace declaration for an element
4541 * basically it does the following checks as described by the
4542 * XML-1.0 recommendation:
4543 * - [ VC: Attribute Value Type ]
4544 * - [ VC: Fixed Attribute Default ]
4545 * - [ VC: Entity Name ]
4546 * - [ VC: Name Token ]
4547 * - [ VC: ID ]
4548 * - [ VC: IDREF ]
4549 * - [ VC: Entity Name ]
4550 * - [ VC: Notation Attributes ]
4551 *
4552 * The ID/IDREF uniqueness and matching are done separately
4553 *
4554 * returns 1 if valid or 0 otherwise
4555 */
4556
4557 int
xmlValidateOneNamespace(xmlValidCtxtPtr ctxt,xmlDocPtr doc,xmlNodePtr elem,const xmlChar * prefix,xmlNsPtr ns,const xmlChar * value)4558 xmlValidateOneNamespace(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
4559 xmlNodePtr elem, const xmlChar *prefix, xmlNsPtr ns, const xmlChar *value) {
4560 /* xmlElementPtr elemDecl; */
4561 xmlAttributePtr attrDecl = NULL;
4562 int val;
4563 int ret = 1;
4564
4565 CHECK_DTD;
4566 if ((elem == NULL) || (elem->name == NULL)) return(0);
4567 if ((ns == NULL) || (ns->href == NULL)) return(0);
4568
4569 if (prefix != NULL) {
4570 xmlChar fn[50];
4571 xmlChar *fullname;
4572
4573 fullname = xmlBuildQName(elem->name, prefix, fn, 50);
4574 if (fullname == NULL) {
4575 xmlVErrMemory(ctxt, "Validating namespace");
4576 return(0);
4577 }
4578 if (ns->prefix != NULL) {
4579 attrDecl = xmlGetDtdQAttrDesc(doc->intSubset, fullname,
4580 ns->prefix, BAD_CAST "xmlns");
4581 if ((attrDecl == NULL) && (doc->extSubset != NULL))
4582 attrDecl = xmlGetDtdQAttrDesc(doc->extSubset, fullname,
4583 ns->prefix, BAD_CAST "xmlns");
4584 } else {
4585 attrDecl = xmlGetDtdAttrDesc(doc->intSubset, fullname,
4586 BAD_CAST "xmlns");
4587 if ((attrDecl == NULL) && (doc->extSubset != NULL))
4588 attrDecl = xmlGetDtdAttrDesc(doc->extSubset, fullname,
4589 BAD_CAST "xmlns");
4590 }
4591 if ((fullname != fn) && (fullname != elem->name))
4592 xmlFree(fullname);
4593 }
4594 if (attrDecl == NULL) {
4595 if (ns->prefix != NULL) {
4596 attrDecl = xmlGetDtdQAttrDesc(doc->intSubset, elem->name,
4597 ns->prefix, BAD_CAST "xmlns");
4598 if ((attrDecl == NULL) && (doc->extSubset != NULL))
4599 attrDecl = xmlGetDtdQAttrDesc(doc->extSubset, elem->name,
4600 ns->prefix, BAD_CAST "xmlns");
4601 } else {
4602 attrDecl = xmlGetDtdAttrDesc(doc->intSubset,
4603 elem->name, BAD_CAST "xmlns");
4604 if ((attrDecl == NULL) && (doc->extSubset != NULL))
4605 attrDecl = xmlGetDtdAttrDesc(doc->extSubset,
4606 elem->name, BAD_CAST "xmlns");
4607 }
4608 }
4609
4610
4611 /* Validity Constraint: Attribute Value Type */
4612 if (attrDecl == NULL) {
4613 if (ns->prefix != NULL) {
4614 xmlErrValidNode(ctxt, elem, XML_DTD_UNKNOWN_ATTRIBUTE,
4615 "No declaration for attribute xmlns:%s of element %s\n",
4616 ns->prefix, elem->name, NULL);
4617 } else {
4618 xmlErrValidNode(ctxt, elem, XML_DTD_UNKNOWN_ATTRIBUTE,
4619 "No declaration for attribute xmlns of element %s\n",
4620 elem->name, NULL, NULL);
4621 }
4622 return(0);
4623 }
4624
4625 val = xmlValidateAttributeValueInternal(doc, attrDecl->atype, value);
4626 if (val == 0) {
4627 if (ns->prefix != NULL) {
4628 xmlErrValidNode(ctxt, elem, XML_DTD_INVALID_DEFAULT,
4629 "Syntax of value for attribute xmlns:%s of %s is not valid\n",
4630 ns->prefix, elem->name, NULL);
4631 } else {
4632 xmlErrValidNode(ctxt, elem, XML_DTD_INVALID_DEFAULT,
4633 "Syntax of value for attribute xmlns of %s is not valid\n",
4634 elem->name, NULL, NULL);
4635 }
4636 ret = 0;
4637 }
4638
4639 /* Validity constraint: Fixed Attribute Default */
4640 if (attrDecl->def == XML_ATTRIBUTE_FIXED) {
4641 if (!xmlStrEqual(value, attrDecl->defaultValue)) {
4642 if (ns->prefix != NULL) {
4643 xmlErrValidNode(ctxt, elem, XML_DTD_ATTRIBUTE_DEFAULT,
4644 "Value for attribute xmlns:%s of %s is different from default \"%s\"\n",
4645 ns->prefix, elem->name, attrDecl->defaultValue);
4646 } else {
4647 xmlErrValidNode(ctxt, elem, XML_DTD_ATTRIBUTE_DEFAULT,
4648 "Value for attribute xmlns of %s is different from default \"%s\"\n",
4649 elem->name, attrDecl->defaultValue, NULL);
4650 }
4651 ret = 0;
4652 }
4653 }
4654
4655 /*
4656 * Casting ns to xmlAttrPtr is wrong. We'd need separate functions
4657 * xmlAddID and xmlAddRef for namespace declarations, but it makes
4658 * no practical sense to use ID types anyway.
4659 */
4660 #if 0
4661 /* Validity Constraint: ID uniqueness */
4662 if (attrDecl->atype == XML_ATTRIBUTE_ID) {
4663 if (xmlAddID(ctxt, doc, value, (xmlAttrPtr) ns) == NULL)
4664 ret = 0;
4665 }
4666
4667 if ((attrDecl->atype == XML_ATTRIBUTE_IDREF) ||
4668 (attrDecl->atype == XML_ATTRIBUTE_IDREFS)) {
4669 if (xmlAddRef(ctxt, doc, value, (xmlAttrPtr) ns) == NULL)
4670 ret = 0;
4671 }
4672 #endif
4673
4674 /* Validity Constraint: Notation Attributes */
4675 if (attrDecl->atype == XML_ATTRIBUTE_NOTATION) {
4676 xmlEnumerationPtr tree = attrDecl->tree;
4677 xmlNotationPtr nota;
4678
4679 /* First check that the given NOTATION was declared */
4680 nota = xmlGetDtdNotationDesc(doc->intSubset, value);
4681 if (nota == NULL)
4682 nota = xmlGetDtdNotationDesc(doc->extSubset, value);
4683
4684 if (nota == NULL) {
4685 if (ns->prefix != NULL) {
4686 xmlErrValidNode(ctxt, elem, XML_DTD_UNKNOWN_NOTATION,
4687 "Value \"%s\" for attribute xmlns:%s of %s is not a declared Notation\n",
4688 value, ns->prefix, elem->name);
4689 } else {
4690 xmlErrValidNode(ctxt, elem, XML_DTD_UNKNOWN_NOTATION,
4691 "Value \"%s\" for attribute xmlns of %s is not a declared Notation\n",
4692 value, elem->name, NULL);
4693 }
4694 ret = 0;
4695 }
4696
4697 /* Second, verify that it's among the list */
4698 while (tree != NULL) {
4699 if (xmlStrEqual(tree->name, value)) break;
4700 tree = tree->next;
4701 }
4702 if (tree == NULL) {
4703 if (ns->prefix != NULL) {
4704 xmlErrValidNode(ctxt, elem, XML_DTD_NOTATION_VALUE,
4705 "Value \"%s\" for attribute xmlns:%s of %s is not among the enumerated notations\n",
4706 value, ns->prefix, elem->name);
4707 } else {
4708 xmlErrValidNode(ctxt, elem, XML_DTD_NOTATION_VALUE,
4709 "Value \"%s\" for attribute xmlns of %s is not among the enumerated notations\n",
4710 value, elem->name, NULL);
4711 }
4712 ret = 0;
4713 }
4714 }
4715
4716 /* Validity Constraint: Enumeration */
4717 if (attrDecl->atype == XML_ATTRIBUTE_ENUMERATION) {
4718 xmlEnumerationPtr tree = attrDecl->tree;
4719 while (tree != NULL) {
4720 if (xmlStrEqual(tree->name, value)) break;
4721 tree = tree->next;
4722 }
4723 if (tree == NULL) {
4724 if (ns->prefix != NULL) {
4725 xmlErrValidNode(ctxt, elem, XML_DTD_ATTRIBUTE_VALUE,
4726 "Value \"%s\" for attribute xmlns:%s of %s is not among the enumerated set\n",
4727 value, ns->prefix, elem->name);
4728 } else {
4729 xmlErrValidNode(ctxt, elem, XML_DTD_ATTRIBUTE_VALUE,
4730 "Value \"%s\" for attribute xmlns of %s is not among the enumerated set\n",
4731 value, elem->name, NULL);
4732 }
4733 ret = 0;
4734 }
4735 }
4736
4737 /* Fixed Attribute Default */
4738 if ((attrDecl->def == XML_ATTRIBUTE_FIXED) &&
4739 (!xmlStrEqual(attrDecl->defaultValue, value))) {
4740 if (ns->prefix != NULL) {
4741 xmlErrValidNode(ctxt, elem, XML_DTD_ELEM_NAMESPACE,
4742 "Value for attribute xmlns:%s of %s must be \"%s\"\n",
4743 ns->prefix, elem->name, attrDecl->defaultValue);
4744 } else {
4745 xmlErrValidNode(ctxt, elem, XML_DTD_ELEM_NAMESPACE,
4746 "Value for attribute xmlns of %s must be \"%s\"\n",
4747 elem->name, attrDecl->defaultValue, NULL);
4748 }
4749 ret = 0;
4750 }
4751
4752 /* Extra check for the attribute value */
4753 if (ns->prefix != NULL) {
4754 ret &= xmlValidateAttributeValue2(ctxt, doc, ns->prefix,
4755 attrDecl->atype, value);
4756 } else {
4757 ret &= xmlValidateAttributeValue2(ctxt, doc, BAD_CAST "xmlns",
4758 attrDecl->atype, value);
4759 }
4760
4761 return(ret);
4762 }
4763
4764 #ifndef LIBXML_REGEXP_ENABLED
4765 /**
4766 * xmlValidateSkipIgnorable:
4767 * @ctxt: the validation context
4768 * @child: the child list
4769 *
4770 * Skip ignorable elements w.r.t. the validation process
4771 *
4772 * returns the first element to consider for validation of the content model
4773 */
4774
4775 static xmlNodePtr
xmlValidateSkipIgnorable(xmlNodePtr child)4776 xmlValidateSkipIgnorable(xmlNodePtr child) {
4777 while (child != NULL) {
4778 switch (child->type) {
4779 /* These things are ignored (skipped) during validation. */
4780 case XML_PI_NODE:
4781 case XML_COMMENT_NODE:
4782 case XML_XINCLUDE_START:
4783 case XML_XINCLUDE_END:
4784 child = child->next;
4785 break;
4786 case XML_TEXT_NODE:
4787 if (xmlIsBlankNode(child))
4788 child = child->next;
4789 else
4790 return(child);
4791 break;
4792 /* keep current node */
4793 default:
4794 return(child);
4795 }
4796 }
4797 return(child);
4798 }
4799
4800 /**
4801 * xmlValidateElementType:
4802 * @ctxt: the validation context
4803 *
4804 * Try to validate the content model of an element internal function
4805 *
4806 * returns 1 if valid or 0 ,-1 in case of error, -2 if an entity
4807 * reference is found and -3 if the validation succeeded but
4808 * the content model is not determinist.
4809 */
4810
4811 static int
xmlValidateElementType(xmlValidCtxtPtr ctxt)4812 xmlValidateElementType(xmlValidCtxtPtr ctxt) {
4813 int ret = -1;
4814 int determinist = 1;
4815
4816 NODE = xmlValidateSkipIgnorable(NODE);
4817 if ((NODE == NULL) && (CONT == NULL))
4818 return(1);
4819 if ((NODE == NULL) &&
4820 ((CONT->ocur == XML_ELEMENT_CONTENT_MULT) ||
4821 (CONT->ocur == XML_ELEMENT_CONTENT_OPT))) {
4822 return(1);
4823 }
4824 if (CONT == NULL) return(-1);
4825 if ((NODE != NULL) && (NODE->type == XML_ENTITY_REF_NODE))
4826 return(-2);
4827
4828 /*
4829 * We arrive here when more states need to be examined
4830 */
4831 cont:
4832
4833 /*
4834 * We just recovered from a rollback generated by a possible
4835 * epsilon transition, go directly to the analysis phase
4836 */
4837 if (STATE == ROLLBACK_PARENT) {
4838 DEBUG_VALID_MSG("restored parent branch");
4839 DEBUG_VALID_STATE(NODE, CONT)
4840 ret = 1;
4841 goto analyze;
4842 }
4843
4844 DEBUG_VALID_STATE(NODE, CONT)
4845 /*
4846 * we may have to save a backup state here. This is the equivalent
4847 * of handling epsilon transition in NFAs.
4848 */
4849 if ((CONT != NULL) &&
4850 ((CONT->parent == NULL) ||
4851 (CONT->parent->type != XML_ELEMENT_CONTENT_OR)) &&
4852 ((CONT->ocur == XML_ELEMENT_CONTENT_MULT) ||
4853 (CONT->ocur == XML_ELEMENT_CONTENT_OPT) ||
4854 ((CONT->ocur == XML_ELEMENT_CONTENT_PLUS) && (OCCURRENCE)))) {
4855 DEBUG_VALID_MSG("saving parent branch");
4856 if (vstateVPush(ctxt, CONT, NODE, DEPTH, OCCURS, ROLLBACK_PARENT) < 0)
4857 return(0);
4858 }
4859
4860
4861 /*
4862 * Check first if the content matches
4863 */
4864 switch (CONT->type) {
4865 case XML_ELEMENT_CONTENT_PCDATA:
4866 if (NODE == NULL) {
4867 DEBUG_VALID_MSG("pcdata failed no node");
4868 ret = 0;
4869 break;
4870 }
4871 if (NODE->type == XML_TEXT_NODE) {
4872 DEBUG_VALID_MSG("pcdata found, skip to next");
4873 /*
4874 * go to next element in the content model
4875 * skipping ignorable elems
4876 */
4877 do {
4878 NODE = NODE->next;
4879 NODE = xmlValidateSkipIgnorable(NODE);
4880 if ((NODE != NULL) &&
4881 (NODE->type == XML_ENTITY_REF_NODE))
4882 return(-2);
4883 } while ((NODE != NULL) &&
4884 ((NODE->type != XML_ELEMENT_NODE) &&
4885 (NODE->type != XML_TEXT_NODE) &&
4886 (NODE->type != XML_CDATA_SECTION_NODE)));
4887 ret = 1;
4888 break;
4889 } else {
4890 DEBUG_VALID_MSG("pcdata failed");
4891 ret = 0;
4892 break;
4893 }
4894 break;
4895 case XML_ELEMENT_CONTENT_ELEMENT:
4896 if (NODE == NULL) {
4897 DEBUG_VALID_MSG("element failed no node");
4898 ret = 0;
4899 break;
4900 }
4901 ret = ((NODE->type == XML_ELEMENT_NODE) &&
4902 (xmlStrEqual(NODE->name, CONT->name)));
4903 if (ret == 1) {
4904 if ((NODE->ns == NULL) || (NODE->ns->prefix == NULL)) {
4905 ret = (CONT->prefix == NULL);
4906 } else if (CONT->prefix == NULL) {
4907 ret = 0;
4908 } else {
4909 ret = xmlStrEqual(NODE->ns->prefix, CONT->prefix);
4910 }
4911 }
4912 if (ret == 1) {
4913 DEBUG_VALID_MSG("element found, skip to next");
4914 /*
4915 * go to next element in the content model
4916 * skipping ignorable elems
4917 */
4918 do {
4919 NODE = NODE->next;
4920 NODE = xmlValidateSkipIgnorable(NODE);
4921 if ((NODE != NULL) &&
4922 (NODE->type == XML_ENTITY_REF_NODE))
4923 return(-2);
4924 } while ((NODE != NULL) &&
4925 ((NODE->type != XML_ELEMENT_NODE) &&
4926 (NODE->type != XML_TEXT_NODE) &&
4927 (NODE->type != XML_CDATA_SECTION_NODE)));
4928 } else {
4929 DEBUG_VALID_MSG("element failed");
4930 ret = 0;
4931 break;
4932 }
4933 break;
4934 case XML_ELEMENT_CONTENT_OR:
4935 /*
4936 * Small optimization.
4937 */
4938 if (CONT->c1->type == XML_ELEMENT_CONTENT_ELEMENT) {
4939 if ((NODE == NULL) ||
4940 (!xmlStrEqual(NODE->name, CONT->c1->name))) {
4941 DEPTH++;
4942 CONT = CONT->c2;
4943 goto cont;
4944 }
4945 if ((NODE->ns == NULL) || (NODE->ns->prefix == NULL)) {
4946 ret = (CONT->c1->prefix == NULL);
4947 } else if (CONT->c1->prefix == NULL) {
4948 ret = 0;
4949 } else {
4950 ret = xmlStrEqual(NODE->ns->prefix, CONT->c1->prefix);
4951 }
4952 if (ret == 0) {
4953 DEPTH++;
4954 CONT = CONT->c2;
4955 goto cont;
4956 }
4957 }
4958
4959 /*
4960 * save the second branch 'or' branch
4961 */
4962 DEBUG_VALID_MSG("saving 'or' branch");
4963 if (vstateVPush(ctxt, CONT->c2, NODE, (unsigned char)(DEPTH + 1),
4964 OCCURS, ROLLBACK_OR) < 0)
4965 return(-1);
4966 DEPTH++;
4967 CONT = CONT->c1;
4968 goto cont;
4969 case XML_ELEMENT_CONTENT_SEQ:
4970 /*
4971 * Small optimization.
4972 */
4973 if ((CONT->c1->type == XML_ELEMENT_CONTENT_ELEMENT) &&
4974 ((CONT->c1->ocur == XML_ELEMENT_CONTENT_OPT) ||
4975 (CONT->c1->ocur == XML_ELEMENT_CONTENT_MULT))) {
4976 if ((NODE == NULL) ||
4977 (!xmlStrEqual(NODE->name, CONT->c1->name))) {
4978 DEPTH++;
4979 CONT = CONT->c2;
4980 goto cont;
4981 }
4982 if ((NODE->ns == NULL) || (NODE->ns->prefix == NULL)) {
4983 ret = (CONT->c1->prefix == NULL);
4984 } else if (CONT->c1->prefix == NULL) {
4985 ret = 0;
4986 } else {
4987 ret = xmlStrEqual(NODE->ns->prefix, CONT->c1->prefix);
4988 }
4989 if (ret == 0) {
4990 DEPTH++;
4991 CONT = CONT->c2;
4992 goto cont;
4993 }
4994 }
4995 DEPTH++;
4996 CONT = CONT->c1;
4997 goto cont;
4998 }
4999
5000 /*
5001 * At this point handle going up in the tree
5002 */
5003 if (ret == -1) {
5004 DEBUG_VALID_MSG("error found returning");
5005 return(ret);
5006 }
5007 analyze:
5008 while (CONT != NULL) {
5009 /*
5010 * First do the analysis depending on the occurrence model at
5011 * this level.
5012 */
5013 if (ret == 0) {
5014 switch (CONT->ocur) {
5015 xmlNodePtr cur;
5016
5017 case XML_ELEMENT_CONTENT_ONCE:
5018 cur = ctxt->vstate->node;
5019 DEBUG_VALID_MSG("Once branch failed, rollback");
5020 if (vstateVPop(ctxt) < 0 ) {
5021 DEBUG_VALID_MSG("exhaustion, failed");
5022 return(0);
5023 }
5024 if (cur != ctxt->vstate->node)
5025 determinist = -3;
5026 goto cont;
5027 case XML_ELEMENT_CONTENT_PLUS:
5028 if (OCCURRENCE == 0) {
5029 cur = ctxt->vstate->node;
5030 DEBUG_VALID_MSG("Plus branch failed, rollback");
5031 if (vstateVPop(ctxt) < 0 ) {
5032 DEBUG_VALID_MSG("exhaustion, failed");
5033 return(0);
5034 }
5035 if (cur != ctxt->vstate->node)
5036 determinist = -3;
5037 goto cont;
5038 }
5039 DEBUG_VALID_MSG("Plus branch found");
5040 ret = 1;
5041 break;
5042 case XML_ELEMENT_CONTENT_MULT:
5043 #ifdef DEBUG_VALID_ALGO
5044 if (OCCURRENCE == 0) {
5045 DEBUG_VALID_MSG("Mult branch failed");
5046 } else {
5047 DEBUG_VALID_MSG("Mult branch found");
5048 }
5049 #endif
5050 ret = 1;
5051 break;
5052 case XML_ELEMENT_CONTENT_OPT:
5053 DEBUG_VALID_MSG("Option branch failed");
5054 ret = 1;
5055 break;
5056 }
5057 } else {
5058 switch (CONT->ocur) {
5059 case XML_ELEMENT_CONTENT_OPT:
5060 DEBUG_VALID_MSG("Option branch succeeded");
5061 ret = 1;
5062 break;
5063 case XML_ELEMENT_CONTENT_ONCE:
5064 DEBUG_VALID_MSG("Once branch succeeded");
5065 ret = 1;
5066 break;
5067 case XML_ELEMENT_CONTENT_PLUS:
5068 if (STATE == ROLLBACK_PARENT) {
5069 DEBUG_VALID_MSG("Plus branch rollback");
5070 ret = 1;
5071 break;
5072 }
5073 if (NODE == NULL) {
5074 DEBUG_VALID_MSG("Plus branch exhausted");
5075 ret = 1;
5076 break;
5077 }
5078 DEBUG_VALID_MSG("Plus branch succeeded, continuing");
5079 SET_OCCURRENCE;
5080 goto cont;
5081 case XML_ELEMENT_CONTENT_MULT:
5082 if (STATE == ROLLBACK_PARENT) {
5083 DEBUG_VALID_MSG("Mult branch rollback");
5084 ret = 1;
5085 break;
5086 }
5087 if (NODE == NULL) {
5088 DEBUG_VALID_MSG("Mult branch exhausted");
5089 ret = 1;
5090 break;
5091 }
5092 DEBUG_VALID_MSG("Mult branch succeeded, continuing");
5093 /* SET_OCCURRENCE; */
5094 goto cont;
5095 }
5096 }
5097 STATE = 0;
5098
5099 /*
5100 * Then act accordingly at the parent level
5101 */
5102 RESET_OCCURRENCE;
5103 if (CONT->parent == NULL)
5104 break;
5105
5106 switch (CONT->parent->type) {
5107 case XML_ELEMENT_CONTENT_PCDATA:
5108 DEBUG_VALID_MSG("Error: parent pcdata");
5109 return(-1);
5110 case XML_ELEMENT_CONTENT_ELEMENT:
5111 DEBUG_VALID_MSG("Error: parent element");
5112 return(-1);
5113 case XML_ELEMENT_CONTENT_OR:
5114 if (ret == 1) {
5115 DEBUG_VALID_MSG("Or succeeded");
5116 CONT = CONT->parent;
5117 DEPTH--;
5118 } else {
5119 DEBUG_VALID_MSG("Or failed");
5120 CONT = CONT->parent;
5121 DEPTH--;
5122 }
5123 break;
5124 case XML_ELEMENT_CONTENT_SEQ:
5125 if (ret == 0) {
5126 DEBUG_VALID_MSG("Sequence failed");
5127 CONT = CONT->parent;
5128 DEPTH--;
5129 } else if (CONT == CONT->parent->c1) {
5130 DEBUG_VALID_MSG("Sequence testing 2nd branch");
5131 CONT = CONT->parent->c2;
5132 goto cont;
5133 } else {
5134 DEBUG_VALID_MSG("Sequence succeeded");
5135 CONT = CONT->parent;
5136 DEPTH--;
5137 }
5138 }
5139 }
5140 if (NODE != NULL) {
5141 xmlNodePtr cur;
5142
5143 cur = ctxt->vstate->node;
5144 DEBUG_VALID_MSG("Failed, remaining input, rollback");
5145 if (vstateVPop(ctxt) < 0 ) {
5146 DEBUG_VALID_MSG("exhaustion, failed");
5147 return(0);
5148 }
5149 if (cur != ctxt->vstate->node)
5150 determinist = -3;
5151 goto cont;
5152 }
5153 if (ret == 0) {
5154 xmlNodePtr cur;
5155
5156 cur = ctxt->vstate->node;
5157 DEBUG_VALID_MSG("Failure, rollback");
5158 if (vstateVPop(ctxt) < 0 ) {
5159 DEBUG_VALID_MSG("exhaustion, failed");
5160 return(0);
5161 }
5162 if (cur != ctxt->vstate->node)
5163 determinist = -3;
5164 goto cont;
5165 }
5166 return(determinist);
5167 }
5168 #endif
5169
5170 /**
5171 * xmlSnprintfElements:
5172 * @buf: an output buffer
5173 * @size: the size of the buffer
5174 * @content: An element
5175 * @glob: 1 if one must print the englobing parenthesis, 0 otherwise
5176 *
5177 * This will dump the list of elements to the buffer
5178 * Intended just for the debug routine
5179 */
5180 static void
xmlSnprintfElements(char * buf,int size,xmlNodePtr node,int glob)5181 xmlSnprintfElements(char *buf, int size, xmlNodePtr node, int glob) {
5182 xmlNodePtr cur;
5183 int len;
5184
5185 if (node == NULL) return;
5186 if (glob) strcat(buf, "(");
5187 cur = node;
5188 while (cur != NULL) {
5189 len = strlen(buf);
5190 if (size - len < 50) {
5191 if ((size - len > 4) && (buf[len - 1] != '.'))
5192 strcat(buf, " ...");
5193 return;
5194 }
5195 switch (cur->type) {
5196 case XML_ELEMENT_NODE:
5197 if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
5198 if (size - len < xmlStrlen(cur->ns->prefix) + 10) {
5199 if ((size - len > 4) && (buf[len - 1] != '.'))
5200 strcat(buf, " ...");
5201 return;
5202 }
5203 strcat(buf, (char *) cur->ns->prefix);
5204 strcat(buf, ":");
5205 }
5206 if (size - len < xmlStrlen(cur->name) + 10) {
5207 if ((size - len > 4) && (buf[len - 1] != '.'))
5208 strcat(buf, " ...");
5209 return;
5210 }
5211 strcat(buf, (char *) cur->name);
5212 if (cur->next != NULL)
5213 strcat(buf, " ");
5214 break;
5215 case XML_TEXT_NODE:
5216 if (xmlIsBlankNode(cur))
5217 break;
5218 /* Falls through. */
5219 case XML_CDATA_SECTION_NODE:
5220 case XML_ENTITY_REF_NODE:
5221 strcat(buf, "CDATA");
5222 if (cur->next != NULL)
5223 strcat(buf, " ");
5224 break;
5225 case XML_ATTRIBUTE_NODE:
5226 case XML_DOCUMENT_NODE:
5227 #ifdef LIBXML_DOCB_ENABLED
5228 case XML_DOCB_DOCUMENT_NODE:
5229 #endif
5230 case XML_HTML_DOCUMENT_NODE:
5231 case XML_DOCUMENT_TYPE_NODE:
5232 case XML_DOCUMENT_FRAG_NODE:
5233 case XML_NOTATION_NODE:
5234 case XML_NAMESPACE_DECL:
5235 strcat(buf, "???");
5236 if (cur->next != NULL)
5237 strcat(buf, " ");
5238 break;
5239 case XML_ENTITY_NODE:
5240 case XML_PI_NODE:
5241 case XML_DTD_NODE:
5242 case XML_COMMENT_NODE:
5243 case XML_ELEMENT_DECL:
5244 case XML_ATTRIBUTE_DECL:
5245 case XML_ENTITY_DECL:
5246 case XML_XINCLUDE_START:
5247 case XML_XINCLUDE_END:
5248 break;
5249 }
5250 cur = cur->next;
5251 }
5252 if (glob) strcat(buf, ")");
5253 }
5254
5255 /**
5256 * xmlValidateElementContent:
5257 * @ctxt: the validation context
5258 * @child: the child list
5259 * @elemDecl: pointer to the element declaration
5260 * @warn: emit the error message
5261 * @parent: the parent element (for error reporting)
5262 *
5263 * Try to validate the content model of an element
5264 *
5265 * returns 1 if valid or 0 if not and -1 in case of error
5266 */
5267
5268 static int
xmlValidateElementContent(xmlValidCtxtPtr ctxt,xmlNodePtr child,xmlElementPtr elemDecl,int warn,xmlNodePtr parent)5269 xmlValidateElementContent(xmlValidCtxtPtr ctxt, xmlNodePtr child,
5270 xmlElementPtr elemDecl, int warn, xmlNodePtr parent) {
5271 int ret = 1;
5272 #ifndef LIBXML_REGEXP_ENABLED
5273 xmlNodePtr repl = NULL, last = NULL, tmp;
5274 #endif
5275 xmlNodePtr cur;
5276 xmlElementContentPtr cont;
5277 const xmlChar *name;
5278
5279 if ((elemDecl == NULL) || (parent == NULL) || (ctxt == NULL))
5280 return(-1);
5281 cont = elemDecl->content;
5282 name = elemDecl->name;
5283
5284 #ifdef LIBXML_REGEXP_ENABLED
5285 /* Build the regexp associated to the content model */
5286 if (elemDecl->contModel == NULL)
5287 ret = xmlValidBuildContentModel(ctxt, elemDecl);
5288 if (elemDecl->contModel == NULL) {
5289 return(-1);
5290 } else {
5291 xmlRegExecCtxtPtr exec;
5292
5293 if (!xmlRegexpIsDeterminist(elemDecl->contModel)) {
5294 return(-1);
5295 }
5296 ctxt->nodeMax = 0;
5297 ctxt->nodeNr = 0;
5298 ctxt->nodeTab = NULL;
5299 exec = xmlRegNewExecCtxt(elemDecl->contModel, NULL, NULL);
5300 if (exec != NULL) {
5301 cur = child;
5302 while (cur != NULL) {
5303 switch (cur->type) {
5304 case XML_ENTITY_REF_NODE:
5305 /*
5306 * Push the current node to be able to roll back
5307 * and process within the entity
5308 */
5309 if ((cur->children != NULL) &&
5310 (cur->children->children != NULL)) {
5311 nodeVPush(ctxt, cur);
5312 cur = cur->children->children;
5313 continue;
5314 }
5315 break;
5316 case XML_TEXT_NODE:
5317 if (xmlIsBlankNode(cur))
5318 break;
5319 ret = 0;
5320 goto fail;
5321 case XML_CDATA_SECTION_NODE:
5322 /* TODO */
5323 ret = 0;
5324 goto fail;
5325 case XML_ELEMENT_NODE:
5326 if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
5327 xmlChar fn[50];
5328 xmlChar *fullname;
5329
5330 fullname = xmlBuildQName(cur->name,
5331 cur->ns->prefix, fn, 50);
5332 if (fullname == NULL) {
5333 ret = -1;
5334 goto fail;
5335 }
5336 ret = xmlRegExecPushString(exec, fullname, NULL);
5337 if ((fullname != fn) && (fullname != cur->name))
5338 xmlFree(fullname);
5339 } else {
5340 ret = xmlRegExecPushString(exec, cur->name, NULL);
5341 }
5342 break;
5343 default:
5344 break;
5345 }
5346 /*
5347 * Switch to next element
5348 */
5349 cur = cur->next;
5350 while (cur == NULL) {
5351 cur = nodeVPop(ctxt);
5352 if (cur == NULL)
5353 break;
5354 cur = cur->next;
5355 }
5356 }
5357 ret = xmlRegExecPushString(exec, NULL, NULL);
5358 fail:
5359 xmlRegFreeExecCtxt(exec);
5360 }
5361 }
5362 #else /* LIBXML_REGEXP_ENABLED */
5363 /*
5364 * Allocate the stack
5365 */
5366 ctxt->vstateMax = 8;
5367 ctxt->vstateTab = (xmlValidState *) xmlMalloc(
5368 ctxt->vstateMax * sizeof(ctxt->vstateTab[0]));
5369 if (ctxt->vstateTab == NULL) {
5370 xmlVErrMemory(ctxt, "malloc failed");
5371 return(-1);
5372 }
5373 /*
5374 * The first entry in the stack is reserved to the current state
5375 */
5376 ctxt->nodeMax = 0;
5377 ctxt->nodeNr = 0;
5378 ctxt->nodeTab = NULL;
5379 ctxt->vstate = &ctxt->vstateTab[0];
5380 ctxt->vstateNr = 1;
5381 CONT = cont;
5382 NODE = child;
5383 DEPTH = 0;
5384 OCCURS = 0;
5385 STATE = 0;
5386 ret = xmlValidateElementType(ctxt);
5387 if ((ret == -3) && (warn)) {
5388 xmlErrValidWarning(ctxt, child, XML_DTD_CONTENT_NOT_DETERMINIST,
5389 "Content model for Element %s is ambiguous\n",
5390 name, NULL, NULL);
5391 } else if (ret == -2) {
5392 /*
5393 * An entities reference appeared at this level.
5394 * Buid a minimal representation of this node content
5395 * sufficient to run the validation process on it
5396 */
5397 DEBUG_VALID_MSG("Found an entity reference, linearizing");
5398 cur = child;
5399 while (cur != NULL) {
5400 switch (cur->type) {
5401 case XML_ENTITY_REF_NODE:
5402 /*
5403 * Push the current node to be able to roll back
5404 * and process within the entity
5405 */
5406 if ((cur->children != NULL) &&
5407 (cur->children->children != NULL)) {
5408 nodeVPush(ctxt, cur);
5409 cur = cur->children->children;
5410 continue;
5411 }
5412 break;
5413 case XML_TEXT_NODE:
5414 if (xmlIsBlankNode(cur))
5415 break;
5416 /* no break on purpose */
5417 case XML_CDATA_SECTION_NODE:
5418 /* no break on purpose */
5419 case XML_ELEMENT_NODE:
5420 /*
5421 * Allocate a new node and minimally fills in
5422 * what's required
5423 */
5424 tmp = (xmlNodePtr) xmlMalloc(sizeof(xmlNode));
5425 if (tmp == NULL) {
5426 xmlVErrMemory(ctxt, "malloc failed");
5427 xmlFreeNodeList(repl);
5428 ret = -1;
5429 goto done;
5430 }
5431 tmp->type = cur->type;
5432 tmp->name = cur->name;
5433 tmp->ns = cur->ns;
5434 tmp->next = NULL;
5435 tmp->content = NULL;
5436 if (repl == NULL)
5437 repl = last = tmp;
5438 else {
5439 last->next = tmp;
5440 last = tmp;
5441 }
5442 if (cur->type == XML_CDATA_SECTION_NODE) {
5443 /*
5444 * E59 spaces in CDATA does not match the
5445 * nonterminal S
5446 */
5447 tmp->content = xmlStrdup(BAD_CAST "CDATA");
5448 }
5449 break;
5450 default:
5451 break;
5452 }
5453 /*
5454 * Switch to next element
5455 */
5456 cur = cur->next;
5457 while (cur == NULL) {
5458 cur = nodeVPop(ctxt);
5459 if (cur == NULL)
5460 break;
5461 cur = cur->next;
5462 }
5463 }
5464
5465 /*
5466 * Relaunch the validation
5467 */
5468 ctxt->vstate = &ctxt->vstateTab[0];
5469 ctxt->vstateNr = 1;
5470 CONT = cont;
5471 NODE = repl;
5472 DEPTH = 0;
5473 OCCURS = 0;
5474 STATE = 0;
5475 ret = xmlValidateElementType(ctxt);
5476 }
5477 #endif /* LIBXML_REGEXP_ENABLED */
5478 if ((warn) && ((ret != 1) && (ret != -3))) {
5479 if (ctxt != NULL) {
5480 char expr[5000];
5481 char list[5000];
5482
5483 expr[0] = 0;
5484 xmlSnprintfElementContent(&expr[0], 5000, cont, 1);
5485 list[0] = 0;
5486 #ifndef LIBXML_REGEXP_ENABLED
5487 if (repl != NULL)
5488 xmlSnprintfElements(&list[0], 5000, repl, 1);
5489 else
5490 #endif /* LIBXML_REGEXP_ENABLED */
5491 xmlSnprintfElements(&list[0], 5000, child, 1);
5492
5493 if (name != NULL) {
5494 xmlErrValidNode(ctxt, parent, XML_DTD_CONTENT_MODEL,
5495 "Element %s content does not follow the DTD, expecting %s, got %s\n",
5496 name, BAD_CAST expr, BAD_CAST list);
5497 } else {
5498 xmlErrValidNode(ctxt, parent, XML_DTD_CONTENT_MODEL,
5499 "Element content does not follow the DTD, expecting %s, got %s\n",
5500 BAD_CAST expr, BAD_CAST list, NULL);
5501 }
5502 } else {
5503 if (name != NULL) {
5504 xmlErrValidNode(ctxt, parent, XML_DTD_CONTENT_MODEL,
5505 "Element %s content does not follow the DTD\n",
5506 name, NULL, NULL);
5507 } else {
5508 xmlErrValidNode(ctxt, parent, XML_DTD_CONTENT_MODEL,
5509 "Element content does not follow the DTD\n",
5510 NULL, NULL, NULL);
5511 }
5512 }
5513 ret = 0;
5514 }
5515 if (ret == -3)
5516 ret = 1;
5517
5518 #ifndef LIBXML_REGEXP_ENABLED
5519 done:
5520 /*
5521 * Deallocate the copy if done, and free up the validation stack
5522 */
5523 while (repl != NULL) {
5524 tmp = repl->next;
5525 xmlFree(repl);
5526 repl = tmp;
5527 }
5528 ctxt->vstateMax = 0;
5529 if (ctxt->vstateTab != NULL) {
5530 xmlFree(ctxt->vstateTab);
5531 ctxt->vstateTab = NULL;
5532 }
5533 #endif
5534 ctxt->nodeMax = 0;
5535 ctxt->nodeNr = 0;
5536 if (ctxt->nodeTab != NULL) {
5537 xmlFree(ctxt->nodeTab);
5538 ctxt->nodeTab = NULL;
5539 }
5540 return(ret);
5541
5542 }
5543
5544 /**
5545 * xmlValidateCdataElement:
5546 * @ctxt: the validation context
5547 * @doc: a document instance
5548 * @elem: an element instance
5549 *
5550 * Check that an element follows #CDATA
5551 *
5552 * returns 1 if valid or 0 otherwise
5553 */
5554 static int
xmlValidateOneCdataElement(xmlValidCtxtPtr ctxt,xmlDocPtr doc,xmlNodePtr elem)5555 xmlValidateOneCdataElement(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
5556 xmlNodePtr elem) {
5557 int ret = 1;
5558 xmlNodePtr cur, child;
5559
5560 if ((ctxt == NULL) || (doc == NULL) || (elem == NULL) ||
5561 (elem->type != XML_ELEMENT_NODE))
5562 return(0);
5563
5564 child = elem->children;
5565
5566 cur = child;
5567 while (cur != NULL) {
5568 switch (cur->type) {
5569 case XML_ENTITY_REF_NODE:
5570 /*
5571 * Push the current node to be able to roll back
5572 * and process within the entity
5573 */
5574 if ((cur->children != NULL) &&
5575 (cur->children->children != NULL)) {
5576 nodeVPush(ctxt, cur);
5577 cur = cur->children->children;
5578 continue;
5579 }
5580 break;
5581 case XML_COMMENT_NODE:
5582 case XML_PI_NODE:
5583 case XML_TEXT_NODE:
5584 case XML_CDATA_SECTION_NODE:
5585 break;
5586 default:
5587 ret = 0;
5588 goto done;
5589 }
5590 /*
5591 * Switch to next element
5592 */
5593 cur = cur->next;
5594 while (cur == NULL) {
5595 cur = nodeVPop(ctxt);
5596 if (cur == NULL)
5597 break;
5598 cur = cur->next;
5599 }
5600 }
5601 done:
5602 ctxt->nodeMax = 0;
5603 ctxt->nodeNr = 0;
5604 if (ctxt->nodeTab != NULL) {
5605 xmlFree(ctxt->nodeTab);
5606 ctxt->nodeTab = NULL;
5607 }
5608 return(ret);
5609 }
5610
5611 /**
5612 * xmlValidateCheckMixed:
5613 * @ctxt: the validation context
5614 * @cont: the mixed content model
5615 * @qname: the qualified name as appearing in the serialization
5616 *
5617 * Check if the given node is part of the content model.
5618 *
5619 * Returns 1 if yes, 0 if no, -1 in case of error
5620 */
5621 static int
xmlValidateCheckMixed(xmlValidCtxtPtr ctxt,xmlElementContentPtr cont,const xmlChar * qname)5622 xmlValidateCheckMixed(xmlValidCtxtPtr ctxt,
5623 xmlElementContentPtr cont, const xmlChar *qname) {
5624 const xmlChar *name;
5625 int plen;
5626 name = xmlSplitQName3(qname, &plen);
5627
5628 if (name == NULL) {
5629 while (cont != NULL) {
5630 if (cont->type == XML_ELEMENT_CONTENT_ELEMENT) {
5631 if ((cont->prefix == NULL) && (xmlStrEqual(cont->name, qname)))
5632 return(1);
5633 } else if ((cont->type == XML_ELEMENT_CONTENT_OR) &&
5634 (cont->c1 != NULL) &&
5635 (cont->c1->type == XML_ELEMENT_CONTENT_ELEMENT)){
5636 if ((cont->c1->prefix == NULL) &&
5637 (xmlStrEqual(cont->c1->name, qname)))
5638 return(1);
5639 } else if ((cont->type != XML_ELEMENT_CONTENT_OR) ||
5640 (cont->c1 == NULL) ||
5641 (cont->c1->type != XML_ELEMENT_CONTENT_PCDATA)){
5642 xmlErrValid(NULL, XML_DTD_MIXED_CORRUPT,
5643 "Internal: MIXED struct corrupted\n",
5644 NULL);
5645 break;
5646 }
5647 cont = cont->c2;
5648 }
5649 } else {
5650 while (cont != NULL) {
5651 if (cont->type == XML_ELEMENT_CONTENT_ELEMENT) {
5652 if ((cont->prefix != NULL) &&
5653 (xmlStrncmp(cont->prefix, qname, plen) == 0) &&
5654 (xmlStrEqual(cont->name, name)))
5655 return(1);
5656 } else if ((cont->type == XML_ELEMENT_CONTENT_OR) &&
5657 (cont->c1 != NULL) &&
5658 (cont->c1->type == XML_ELEMENT_CONTENT_ELEMENT)){
5659 if ((cont->c1->prefix != NULL) &&
5660 (xmlStrncmp(cont->c1->prefix, qname, plen) == 0) &&
5661 (xmlStrEqual(cont->c1->name, name)))
5662 return(1);
5663 } else if ((cont->type != XML_ELEMENT_CONTENT_OR) ||
5664 (cont->c1 == NULL) ||
5665 (cont->c1->type != XML_ELEMENT_CONTENT_PCDATA)){
5666 xmlErrValid(ctxt, XML_DTD_MIXED_CORRUPT,
5667 "Internal: MIXED struct corrupted\n",
5668 NULL);
5669 break;
5670 }
5671 cont = cont->c2;
5672 }
5673 }
5674 return(0);
5675 }
5676
5677 /**
5678 * xmlValidGetElemDecl:
5679 * @ctxt: the validation context
5680 * @doc: a document instance
5681 * @elem: an element instance
5682 * @extsubset: pointer, (out) indicate if the declaration was found
5683 * in the external subset.
5684 *
5685 * Finds a declaration associated to an element in the document.
5686 *
5687 * returns the pointer to the declaration or NULL if not found.
5688 */
5689 static xmlElementPtr
xmlValidGetElemDecl(xmlValidCtxtPtr ctxt,xmlDocPtr doc,xmlNodePtr elem,int * extsubset)5690 xmlValidGetElemDecl(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
5691 xmlNodePtr elem, int *extsubset) {
5692 xmlElementPtr elemDecl = NULL;
5693 const xmlChar *prefix = NULL;
5694
5695 if ((ctxt == NULL) || (doc == NULL) ||
5696 (elem == NULL) || (elem->name == NULL))
5697 return(NULL);
5698 if (extsubset != NULL)
5699 *extsubset = 0;
5700
5701 /*
5702 * Fetch the declaration for the qualified name
5703 */
5704 if ((elem->ns != NULL) && (elem->ns->prefix != NULL))
5705 prefix = elem->ns->prefix;
5706
5707 if (prefix != NULL) {
5708 elemDecl = xmlGetDtdQElementDesc(doc->intSubset,
5709 elem->name, prefix);
5710 if ((elemDecl == NULL) && (doc->extSubset != NULL)) {
5711 elemDecl = xmlGetDtdQElementDesc(doc->extSubset,
5712 elem->name, prefix);
5713 if ((elemDecl != NULL) && (extsubset != NULL))
5714 *extsubset = 1;
5715 }
5716 }
5717
5718 /*
5719 * Fetch the declaration for the non qualified name
5720 * This is "non-strict" validation should be done on the
5721 * full QName but in that case being flexible makes sense.
5722 */
5723 if (elemDecl == NULL) {
5724 elemDecl = xmlGetDtdElementDesc(doc->intSubset, elem->name);
5725 if ((elemDecl == NULL) && (doc->extSubset != NULL)) {
5726 elemDecl = xmlGetDtdElementDesc(doc->extSubset, elem->name);
5727 if ((elemDecl != NULL) && (extsubset != NULL))
5728 *extsubset = 1;
5729 }
5730 }
5731 if (elemDecl == NULL) {
5732 xmlErrValidNode(ctxt, elem,
5733 XML_DTD_UNKNOWN_ELEM,
5734 "No declaration for element %s\n",
5735 elem->name, NULL, NULL);
5736 }
5737 return(elemDecl);
5738 }
5739
5740 #ifdef LIBXML_REGEXP_ENABLED
5741 /**
5742 * xmlValidatePushElement:
5743 * @ctxt: the validation context
5744 * @doc: a document instance
5745 * @elem: an element instance
5746 * @qname: the qualified name as appearing in the serialization
5747 *
5748 * Push a new element start on the validation stack.
5749 *
5750 * returns 1 if no validation problem was found or 0 otherwise
5751 */
5752 int
xmlValidatePushElement(xmlValidCtxtPtr ctxt,xmlDocPtr doc,xmlNodePtr elem,const xmlChar * qname)5753 xmlValidatePushElement(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
5754 xmlNodePtr elem, const xmlChar *qname) {
5755 int ret = 1;
5756 xmlElementPtr eDecl;
5757 int extsubset = 0;
5758
5759 if (ctxt == NULL)
5760 return(0);
5761 /* printf("PushElem %s\n", qname); */
5762 if ((ctxt->vstateNr > 0) && (ctxt->vstate != NULL)) {
5763 xmlValidStatePtr state = ctxt->vstate;
5764 xmlElementPtr elemDecl;
5765
5766 /*
5767 * Check the new element against the content model of the new elem.
5768 */
5769 if (state->elemDecl != NULL) {
5770 elemDecl = state->elemDecl;
5771
5772 switch(elemDecl->etype) {
5773 case XML_ELEMENT_TYPE_UNDEFINED:
5774 ret = 0;
5775 break;
5776 case XML_ELEMENT_TYPE_EMPTY:
5777 xmlErrValidNode(ctxt, state->node,
5778 XML_DTD_NOT_EMPTY,
5779 "Element %s was declared EMPTY this one has content\n",
5780 state->node->name, NULL, NULL);
5781 ret = 0;
5782 break;
5783 case XML_ELEMENT_TYPE_ANY:
5784 /* I don't think anything is required then */
5785 break;
5786 case XML_ELEMENT_TYPE_MIXED:
5787 /* simple case of declared as #PCDATA */
5788 if ((elemDecl->content != NULL) &&
5789 (elemDecl->content->type ==
5790 XML_ELEMENT_CONTENT_PCDATA)) {
5791 xmlErrValidNode(ctxt, state->node,
5792 XML_DTD_NOT_PCDATA,
5793 "Element %s was declared #PCDATA but contains non text nodes\n",
5794 state->node->name, NULL, NULL);
5795 ret = 0;
5796 } else {
5797 ret = xmlValidateCheckMixed(ctxt, elemDecl->content,
5798 qname);
5799 if (ret != 1) {
5800 xmlErrValidNode(ctxt, state->node,
5801 XML_DTD_INVALID_CHILD,
5802 "Element %s is not declared in %s list of possible children\n",
5803 qname, state->node->name, NULL);
5804 }
5805 }
5806 break;
5807 case XML_ELEMENT_TYPE_ELEMENT:
5808 /*
5809 * TODO:
5810 * VC: Standalone Document Declaration
5811 * - element types with element content, if white space
5812 * occurs directly within any instance of those types.
5813 */
5814 if (state->exec != NULL) {
5815 ret = xmlRegExecPushString(state->exec, qname, NULL);
5816 if (ret < 0) {
5817 xmlErrValidNode(ctxt, state->node,
5818 XML_DTD_CONTENT_MODEL,
5819 "Element %s content does not follow the DTD, Misplaced %s\n",
5820 state->node->name, qname, NULL);
5821 ret = 0;
5822 } else {
5823 ret = 1;
5824 }
5825 }
5826 break;
5827 }
5828 }
5829 }
5830 eDecl = xmlValidGetElemDecl(ctxt, doc, elem, &extsubset);
5831 vstateVPush(ctxt, eDecl, elem);
5832 return(ret);
5833 }
5834
5835 /**
5836 * xmlValidatePushCData:
5837 * @ctxt: the validation context
5838 * @data: some character data read
5839 * @len: the length of the data
5840 *
5841 * check the CData parsed for validation in the current stack
5842 *
5843 * returns 1 if no validation problem was found or 0 otherwise
5844 */
5845 int
xmlValidatePushCData(xmlValidCtxtPtr ctxt,const xmlChar * data,int len)5846 xmlValidatePushCData(xmlValidCtxtPtr ctxt, const xmlChar *data, int len) {
5847 int ret = 1;
5848
5849 /* printf("CDATA %s %d\n", data, len); */
5850 if (ctxt == NULL)
5851 return(0);
5852 if (len <= 0)
5853 return(ret);
5854 if ((ctxt->vstateNr > 0) && (ctxt->vstate != NULL)) {
5855 xmlValidStatePtr state = ctxt->vstate;
5856 xmlElementPtr elemDecl;
5857
5858 /*
5859 * Check the new element against the content model of the new elem.
5860 */
5861 if (state->elemDecl != NULL) {
5862 elemDecl = state->elemDecl;
5863
5864 switch(elemDecl->etype) {
5865 case XML_ELEMENT_TYPE_UNDEFINED:
5866 ret = 0;
5867 break;
5868 case XML_ELEMENT_TYPE_EMPTY:
5869 xmlErrValidNode(ctxt, state->node,
5870 XML_DTD_NOT_EMPTY,
5871 "Element %s was declared EMPTY this one has content\n",
5872 state->node->name, NULL, NULL);
5873 ret = 0;
5874 break;
5875 case XML_ELEMENT_TYPE_ANY:
5876 break;
5877 case XML_ELEMENT_TYPE_MIXED:
5878 break;
5879 case XML_ELEMENT_TYPE_ELEMENT:
5880 if (len > 0) {
5881 int i;
5882
5883 for (i = 0;i < len;i++) {
5884 if (!IS_BLANK_CH(data[i])) {
5885 xmlErrValidNode(ctxt, state->node,
5886 XML_DTD_CONTENT_MODEL,
5887 "Element %s content does not follow the DTD, Text not allowed\n",
5888 state->node->name, NULL, NULL);
5889 ret = 0;
5890 goto done;
5891 }
5892 }
5893 /*
5894 * TODO:
5895 * VC: Standalone Document Declaration
5896 * element types with element content, if white space
5897 * occurs directly within any instance of those types.
5898 */
5899 }
5900 break;
5901 }
5902 }
5903 }
5904 done:
5905 return(ret);
5906 }
5907
5908 /**
5909 * xmlValidatePopElement:
5910 * @ctxt: the validation context
5911 * @doc: a document instance
5912 * @elem: an element instance
5913 * @qname: the qualified name as appearing in the serialization
5914 *
5915 * Pop the element end from the validation stack.
5916 *
5917 * returns 1 if no validation problem was found or 0 otherwise
5918 */
5919 int
xmlValidatePopElement(xmlValidCtxtPtr ctxt,xmlDocPtr doc ATTRIBUTE_UNUSED,xmlNodePtr elem ATTRIBUTE_UNUSED,const xmlChar * qname ATTRIBUTE_UNUSED)5920 xmlValidatePopElement(xmlValidCtxtPtr ctxt, xmlDocPtr doc ATTRIBUTE_UNUSED,
5921 xmlNodePtr elem ATTRIBUTE_UNUSED,
5922 const xmlChar *qname ATTRIBUTE_UNUSED) {
5923 int ret = 1;
5924
5925 if (ctxt == NULL)
5926 return(0);
5927 /* printf("PopElem %s\n", qname); */
5928 if ((ctxt->vstateNr > 0) && (ctxt->vstate != NULL)) {
5929 xmlValidStatePtr state = ctxt->vstate;
5930 xmlElementPtr elemDecl;
5931
5932 /*
5933 * Check the new element against the content model of the new elem.
5934 */
5935 if (state->elemDecl != NULL) {
5936 elemDecl = state->elemDecl;
5937
5938 if (elemDecl->etype == XML_ELEMENT_TYPE_ELEMENT) {
5939 if (state->exec != NULL) {
5940 ret = xmlRegExecPushString(state->exec, NULL, NULL);
5941 if (ret == 0) {
5942 xmlErrValidNode(ctxt, state->node,
5943 XML_DTD_CONTENT_MODEL,
5944 "Element %s content does not follow the DTD, Expecting more child\n",
5945 state->node->name, NULL,NULL);
5946 } else {
5947 /*
5948 * previous validation errors should not generate
5949 * a new one here
5950 */
5951 ret = 1;
5952 }
5953 }
5954 }
5955 }
5956 vstateVPop(ctxt);
5957 }
5958 return(ret);
5959 }
5960 #endif /* LIBXML_REGEXP_ENABLED */
5961
5962 /**
5963 * xmlValidateOneElement:
5964 * @ctxt: the validation context
5965 * @doc: a document instance
5966 * @elem: an element instance
5967 *
5968 * Try to validate a single element and it's attributes,
5969 * basically it does the following checks as described by the
5970 * XML-1.0 recommendation:
5971 * - [ VC: Element Valid ]
5972 * - [ VC: Required Attribute ]
5973 * Then call xmlValidateOneAttribute() for each attribute present.
5974 *
5975 * The ID/IDREF checkings are done separately
5976 *
5977 * returns 1 if valid or 0 otherwise
5978 */
5979
5980 int
xmlValidateOneElement(xmlValidCtxtPtr ctxt,xmlDocPtr doc,xmlNodePtr elem)5981 xmlValidateOneElement(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
5982 xmlNodePtr elem) {
5983 xmlElementPtr elemDecl = NULL;
5984 xmlElementContentPtr cont;
5985 xmlAttributePtr attr;
5986 xmlNodePtr child;
5987 int ret = 1, tmp;
5988 const xmlChar *name;
5989 int extsubset = 0;
5990
5991 CHECK_DTD;
5992
5993 if (elem == NULL) return(0);
5994 switch (elem->type) {
5995 case XML_ATTRIBUTE_NODE:
5996 xmlErrValidNode(ctxt, elem, XML_ERR_INTERNAL_ERROR,
5997 "Attribute element not expected\n", NULL, NULL ,NULL);
5998 return(0);
5999 case XML_TEXT_NODE:
6000 if (elem->children != NULL) {
6001 xmlErrValidNode(ctxt, elem, XML_ERR_INTERNAL_ERROR,
6002 "Text element has children !\n",
6003 NULL,NULL,NULL);
6004 return(0);
6005 }
6006 if (elem->ns != NULL) {
6007 xmlErrValidNode(ctxt, elem, XML_ERR_INTERNAL_ERROR,
6008 "Text element has namespace !\n",
6009 NULL,NULL,NULL);
6010 return(0);
6011 }
6012 if (elem->content == NULL) {
6013 xmlErrValidNode(ctxt, elem, XML_ERR_INTERNAL_ERROR,
6014 "Text element has no content !\n",
6015 NULL,NULL,NULL);
6016 return(0);
6017 }
6018 return(1);
6019 case XML_XINCLUDE_START:
6020 case XML_XINCLUDE_END:
6021 return(1);
6022 case XML_CDATA_SECTION_NODE:
6023 case XML_ENTITY_REF_NODE:
6024 case XML_PI_NODE:
6025 case XML_COMMENT_NODE:
6026 return(1);
6027 case XML_ENTITY_NODE:
6028 xmlErrValidNode(ctxt, elem, XML_ERR_INTERNAL_ERROR,
6029 "Entity element not expected\n", NULL, NULL ,NULL);
6030 return(0);
6031 case XML_NOTATION_NODE:
6032 xmlErrValidNode(ctxt, elem, XML_ERR_INTERNAL_ERROR,
6033 "Notation element not expected\n", NULL, NULL ,NULL);
6034 return(0);
6035 case XML_DOCUMENT_NODE:
6036 case XML_DOCUMENT_TYPE_NODE:
6037 case XML_DOCUMENT_FRAG_NODE:
6038 xmlErrValidNode(ctxt, elem, XML_ERR_INTERNAL_ERROR,
6039 "Document element not expected\n", NULL, NULL ,NULL);
6040 return(0);
6041 case XML_HTML_DOCUMENT_NODE:
6042 xmlErrValidNode(ctxt, elem, XML_ERR_INTERNAL_ERROR,
6043 "HTML Document not expected\n", NULL, NULL ,NULL);
6044 return(0);
6045 case XML_ELEMENT_NODE:
6046 break;
6047 default:
6048 xmlErrValidNode(ctxt, elem, XML_ERR_INTERNAL_ERROR,
6049 "unknown element type\n", NULL, NULL ,NULL);
6050 return(0);
6051 }
6052
6053 /*
6054 * Fetch the declaration
6055 */
6056 elemDecl = xmlValidGetElemDecl(ctxt, doc, elem, &extsubset);
6057 if (elemDecl == NULL)
6058 return(0);
6059
6060 /*
6061 * If vstateNr is not zero that means continuous validation is
6062 * activated, do not try to check the content model at that level.
6063 */
6064 if (ctxt->vstateNr == 0) {
6065 /* Check that the element content matches the definition */
6066 switch (elemDecl->etype) {
6067 case XML_ELEMENT_TYPE_UNDEFINED:
6068 xmlErrValidNode(ctxt, elem, XML_DTD_UNKNOWN_ELEM,
6069 "No declaration for element %s\n",
6070 elem->name, NULL, NULL);
6071 return(0);
6072 case XML_ELEMENT_TYPE_EMPTY:
6073 if (elem->children != NULL) {
6074 xmlErrValidNode(ctxt, elem, XML_DTD_NOT_EMPTY,
6075 "Element %s was declared EMPTY this one has content\n",
6076 elem->name, NULL, NULL);
6077 ret = 0;
6078 }
6079 break;
6080 case XML_ELEMENT_TYPE_ANY:
6081 /* I don't think anything is required then */
6082 break;
6083 case XML_ELEMENT_TYPE_MIXED:
6084
6085 /* simple case of declared as #PCDATA */
6086 if ((elemDecl->content != NULL) &&
6087 (elemDecl->content->type == XML_ELEMENT_CONTENT_PCDATA)) {
6088 ret = xmlValidateOneCdataElement(ctxt, doc, elem);
6089 if (!ret) {
6090 xmlErrValidNode(ctxt, elem, XML_DTD_NOT_PCDATA,
6091 "Element %s was declared #PCDATA but contains non text nodes\n",
6092 elem->name, NULL, NULL);
6093 }
6094 break;
6095 }
6096 child = elem->children;
6097 /* Hum, this start to get messy */
6098 while (child != NULL) {
6099 if (child->type == XML_ELEMENT_NODE) {
6100 name = child->name;
6101 if ((child->ns != NULL) && (child->ns->prefix != NULL)) {
6102 xmlChar fn[50];
6103 xmlChar *fullname;
6104
6105 fullname = xmlBuildQName(child->name, child->ns->prefix,
6106 fn, 50);
6107 if (fullname == NULL)
6108 return(0);
6109 cont = elemDecl->content;
6110 while (cont != NULL) {
6111 if (cont->type == XML_ELEMENT_CONTENT_ELEMENT) {
6112 if (xmlStrEqual(cont->name, fullname))
6113 break;
6114 } else if ((cont->type == XML_ELEMENT_CONTENT_OR) &&
6115 (cont->c1 != NULL) &&
6116 (cont->c1->type == XML_ELEMENT_CONTENT_ELEMENT)){
6117 if (xmlStrEqual(cont->c1->name, fullname))
6118 break;
6119 } else if ((cont->type != XML_ELEMENT_CONTENT_OR) ||
6120 (cont->c1 == NULL) ||
6121 (cont->c1->type != XML_ELEMENT_CONTENT_PCDATA)){
6122 xmlErrValid(NULL, XML_DTD_MIXED_CORRUPT,
6123 "Internal: MIXED struct corrupted\n",
6124 NULL);
6125 break;
6126 }
6127 cont = cont->c2;
6128 }
6129 if ((fullname != fn) && (fullname != child->name))
6130 xmlFree(fullname);
6131 if (cont != NULL)
6132 goto child_ok;
6133 }
6134 cont = elemDecl->content;
6135 while (cont != NULL) {
6136 if (cont->type == XML_ELEMENT_CONTENT_ELEMENT) {
6137 if (xmlStrEqual(cont->name, name)) break;
6138 } else if ((cont->type == XML_ELEMENT_CONTENT_OR) &&
6139 (cont->c1 != NULL) &&
6140 (cont->c1->type == XML_ELEMENT_CONTENT_ELEMENT)) {
6141 if (xmlStrEqual(cont->c1->name, name)) break;
6142 } else if ((cont->type != XML_ELEMENT_CONTENT_OR) ||
6143 (cont->c1 == NULL) ||
6144 (cont->c1->type != XML_ELEMENT_CONTENT_PCDATA)) {
6145 xmlErrValid(ctxt, XML_DTD_MIXED_CORRUPT,
6146 "Internal: MIXED struct corrupted\n",
6147 NULL);
6148 break;
6149 }
6150 cont = cont->c2;
6151 }
6152 if (cont == NULL) {
6153 xmlErrValidNode(ctxt, elem, XML_DTD_INVALID_CHILD,
6154 "Element %s is not declared in %s list of possible children\n",
6155 name, elem->name, NULL);
6156 ret = 0;
6157 }
6158 }
6159 child_ok:
6160 child = child->next;
6161 }
6162 break;
6163 case XML_ELEMENT_TYPE_ELEMENT:
6164 if ((doc->standalone == 1) && (extsubset == 1)) {
6165 /*
6166 * VC: Standalone Document Declaration
6167 * - element types with element content, if white space
6168 * occurs directly within any instance of those types.
6169 */
6170 child = elem->children;
6171 while (child != NULL) {
6172 if (child->type == XML_TEXT_NODE) {
6173 const xmlChar *content = child->content;
6174
6175 while (IS_BLANK_CH(*content))
6176 content++;
6177 if (*content == 0) {
6178 xmlErrValidNode(ctxt, elem,
6179 XML_DTD_STANDALONE_WHITE_SPACE,
6180 "standalone: %s declared in the external subset contains white spaces nodes\n",
6181 elem->name, NULL, NULL);
6182 ret = 0;
6183 break;
6184 }
6185 }
6186 child =child->next;
6187 }
6188 }
6189 child = elem->children;
6190 cont = elemDecl->content;
6191 tmp = xmlValidateElementContent(ctxt, child, elemDecl, 1, elem);
6192 if (tmp <= 0)
6193 ret = tmp;
6194 break;
6195 }
6196 } /* not continuous */
6197
6198 /* [ VC: Required Attribute ] */
6199 attr = elemDecl->attributes;
6200 while (attr != NULL) {
6201 if (attr->def == XML_ATTRIBUTE_REQUIRED) {
6202 int qualified = -1;
6203
6204 if ((attr->prefix == NULL) &&
6205 (xmlStrEqual(attr->name, BAD_CAST "xmlns"))) {
6206 xmlNsPtr ns;
6207
6208 ns = elem->nsDef;
6209 while (ns != NULL) {
6210 if (ns->prefix == NULL)
6211 goto found;
6212 ns = ns->next;
6213 }
6214 } else if (xmlStrEqual(attr->prefix, BAD_CAST "xmlns")) {
6215 xmlNsPtr ns;
6216
6217 ns = elem->nsDef;
6218 while (ns != NULL) {
6219 if (xmlStrEqual(attr->name, ns->prefix))
6220 goto found;
6221 ns = ns->next;
6222 }
6223 } else {
6224 xmlAttrPtr attrib;
6225
6226 attrib = elem->properties;
6227 while (attrib != NULL) {
6228 if (xmlStrEqual(attrib->name, attr->name)) {
6229 if (attr->prefix != NULL) {
6230 xmlNsPtr nameSpace = attrib->ns;
6231
6232 if (nameSpace == NULL)
6233 nameSpace = elem->ns;
6234 /*
6235 * qualified names handling is problematic, having a
6236 * different prefix should be possible but DTDs don't
6237 * allow to define the URI instead of the prefix :-(
6238 */
6239 if (nameSpace == NULL) {
6240 if (qualified < 0)
6241 qualified = 0;
6242 } else if (!xmlStrEqual(nameSpace->prefix,
6243 attr->prefix)) {
6244 if (qualified < 1)
6245 qualified = 1;
6246 } else
6247 goto found;
6248 } else {
6249 /*
6250 * We should allow applications to define namespaces
6251 * for their application even if the DTD doesn't
6252 * carry one, otherwise, basically we would always
6253 * break.
6254 */
6255 goto found;
6256 }
6257 }
6258 attrib = attrib->next;
6259 }
6260 }
6261 if (qualified == -1) {
6262 if (attr->prefix == NULL) {
6263 xmlErrValidNode(ctxt, elem, XML_DTD_MISSING_ATTRIBUTE,
6264 "Element %s does not carry attribute %s\n",
6265 elem->name, attr->name, NULL);
6266 ret = 0;
6267 } else {
6268 xmlErrValidNode(ctxt, elem, XML_DTD_MISSING_ATTRIBUTE,
6269 "Element %s does not carry attribute %s:%s\n",
6270 elem->name, attr->prefix,attr->name);
6271 ret = 0;
6272 }
6273 } else if (qualified == 0) {
6274 xmlErrValidWarning(ctxt, elem, XML_DTD_NO_PREFIX,
6275 "Element %s required attribute %s:%s has no prefix\n",
6276 elem->name, attr->prefix, attr->name);
6277 } else if (qualified == 1) {
6278 xmlErrValidWarning(ctxt, elem, XML_DTD_DIFFERENT_PREFIX,
6279 "Element %s required attribute %s:%s has different prefix\n",
6280 elem->name, attr->prefix, attr->name);
6281 }
6282 } else if (attr->def == XML_ATTRIBUTE_FIXED) {
6283 /*
6284 * Special tests checking #FIXED namespace declarations
6285 * have the right value since this is not done as an
6286 * attribute checking
6287 */
6288 if ((attr->prefix == NULL) &&
6289 (xmlStrEqual(attr->name, BAD_CAST "xmlns"))) {
6290 xmlNsPtr ns;
6291
6292 ns = elem->nsDef;
6293 while (ns != NULL) {
6294 if (ns->prefix == NULL) {
6295 if (!xmlStrEqual(attr->defaultValue, ns->href)) {
6296 xmlErrValidNode(ctxt, elem,
6297 XML_DTD_ELEM_DEFAULT_NAMESPACE,
6298 "Element %s namespace name for default namespace does not match the DTD\n",
6299 elem->name, NULL, NULL);
6300 ret = 0;
6301 }
6302 goto found;
6303 }
6304 ns = ns->next;
6305 }
6306 } else if (xmlStrEqual(attr->prefix, BAD_CAST "xmlns")) {
6307 xmlNsPtr ns;
6308
6309 ns = elem->nsDef;
6310 while (ns != NULL) {
6311 if (xmlStrEqual(attr->name, ns->prefix)) {
6312 if (!xmlStrEqual(attr->defaultValue, ns->href)) {
6313 xmlErrValidNode(ctxt, elem, XML_DTD_ELEM_NAMESPACE,
6314 "Element %s namespace name for %s does not match the DTD\n",
6315 elem->name, ns->prefix, NULL);
6316 ret = 0;
6317 }
6318 goto found;
6319 }
6320 ns = ns->next;
6321 }
6322 }
6323 }
6324 found:
6325 attr = attr->nexth;
6326 }
6327 return(ret);
6328 }
6329
6330 /**
6331 * xmlValidateRoot:
6332 * @ctxt: the validation context
6333 * @doc: a document instance
6334 *
6335 * Try to validate a the root element
6336 * basically it does the following check as described by the
6337 * XML-1.0 recommendation:
6338 * - [ VC: Root Element Type ]
6339 * it doesn't try to recurse or apply other check to the element
6340 *
6341 * returns 1 if valid or 0 otherwise
6342 */
6343
6344 int
xmlValidateRoot(xmlValidCtxtPtr ctxt,xmlDocPtr doc)6345 xmlValidateRoot(xmlValidCtxtPtr ctxt, xmlDocPtr doc) {
6346 xmlNodePtr root;
6347 int ret;
6348
6349 if (doc == NULL) return(0);
6350
6351 root = xmlDocGetRootElement(doc);
6352 if ((root == NULL) || (root->name == NULL)) {
6353 xmlErrValid(ctxt, XML_DTD_NO_ROOT,
6354 "no root element\n", NULL);
6355 return(0);
6356 }
6357
6358 /*
6359 * When doing post validation against a separate DTD, those may
6360 * no internal subset has been generated
6361 */
6362 if ((doc->intSubset != NULL) &&
6363 (doc->intSubset->name != NULL)) {
6364 /*
6365 * Check first the document root against the NQName
6366 */
6367 if (!xmlStrEqual(doc->intSubset->name, root->name)) {
6368 if ((root->ns != NULL) && (root->ns->prefix != NULL)) {
6369 xmlChar fn[50];
6370 xmlChar *fullname;
6371
6372 fullname = xmlBuildQName(root->name, root->ns->prefix, fn, 50);
6373 if (fullname == NULL) {
6374 xmlVErrMemory(ctxt, NULL);
6375 return(0);
6376 }
6377 ret = xmlStrEqual(doc->intSubset->name, fullname);
6378 if ((fullname != fn) && (fullname != root->name))
6379 xmlFree(fullname);
6380 if (ret == 1)
6381 goto name_ok;
6382 }
6383 if ((xmlStrEqual(doc->intSubset->name, BAD_CAST "HTML")) &&
6384 (xmlStrEqual(root->name, BAD_CAST "html")))
6385 goto name_ok;
6386 xmlErrValidNode(ctxt, root, XML_DTD_ROOT_NAME,
6387 "root and DTD name do not match '%s' and '%s'\n",
6388 root->name, doc->intSubset->name, NULL);
6389 return(0);
6390 }
6391 }
6392 name_ok:
6393 return(1);
6394 }
6395
6396
6397 /**
6398 * xmlValidateElement:
6399 * @ctxt: the validation context
6400 * @doc: a document instance
6401 * @elem: an element instance
6402 *
6403 * Try to validate the subtree under an element
6404 *
6405 * returns 1 if valid or 0 otherwise
6406 */
6407
6408 int
xmlValidateElement(xmlValidCtxtPtr ctxt,xmlDocPtr doc,xmlNodePtr elem)6409 xmlValidateElement(xmlValidCtxtPtr ctxt, xmlDocPtr doc, xmlNodePtr elem) {
6410 xmlNodePtr child;
6411 xmlAttrPtr attr;
6412 xmlNsPtr ns;
6413 const xmlChar *value;
6414 int ret = 1;
6415
6416 if (elem == NULL) return(0);
6417
6418 /*
6419 * XInclude elements were added after parsing in the infoset,
6420 * they don't really mean anything validation wise.
6421 */
6422 if ((elem->type == XML_XINCLUDE_START) ||
6423 (elem->type == XML_XINCLUDE_END) ||
6424 (elem->type == XML_NAMESPACE_DECL))
6425 return(1);
6426
6427 CHECK_DTD;
6428
6429 /*
6430 * Entities references have to be handled separately
6431 */
6432 if (elem->type == XML_ENTITY_REF_NODE) {
6433 return(1);
6434 }
6435
6436 ret &= xmlValidateOneElement(ctxt, doc, elem);
6437 if (elem->type == XML_ELEMENT_NODE) {
6438 attr = elem->properties;
6439 while (attr != NULL) {
6440 value = xmlNodeListGetString(doc, attr->children, 0);
6441 ret &= xmlValidateOneAttribute(ctxt, doc, elem, attr, value);
6442 if (value != NULL)
6443 xmlFree((char *)value);
6444 attr= attr->next;
6445 }
6446 ns = elem->nsDef;
6447 while (ns != NULL) {
6448 if (elem->ns == NULL)
6449 ret &= xmlValidateOneNamespace(ctxt, doc, elem, NULL,
6450 ns, ns->href);
6451 else
6452 ret &= xmlValidateOneNamespace(ctxt, doc, elem,
6453 elem->ns->prefix, ns, ns->href);
6454 ns = ns->next;
6455 }
6456 }
6457 child = elem->children;
6458 while (child != NULL) {
6459 ret &= xmlValidateElement(ctxt, doc, child);
6460 child = child->next;
6461 }
6462
6463 return(ret);
6464 }
6465
6466 /**
6467 * xmlValidateRef:
6468 * @ref: A reference to be validated
6469 * @ctxt: Validation context
6470 * @name: Name of ID we are searching for
6471 *
6472 */
6473 static void
xmlValidateRef(xmlRefPtr ref,xmlValidCtxtPtr ctxt,const xmlChar * name)6474 xmlValidateRef(xmlRefPtr ref, xmlValidCtxtPtr ctxt,
6475 const xmlChar *name) {
6476 xmlAttrPtr id;
6477 xmlAttrPtr attr;
6478
6479 if (ref == NULL)
6480 return;
6481 if ((ref->attr == NULL) && (ref->name == NULL))
6482 return;
6483 attr = ref->attr;
6484 if (attr == NULL) {
6485 xmlChar *dup, *str = NULL, *cur, save;
6486
6487 dup = xmlStrdup(name);
6488 if (dup == NULL) {
6489 ctxt->valid = 0;
6490 return;
6491 }
6492 cur = dup;
6493 while (*cur != 0) {
6494 str = cur;
6495 while ((*cur != 0) && (!IS_BLANK_CH(*cur))) cur++;
6496 save = *cur;
6497 *cur = 0;
6498 id = xmlGetID(ctxt->doc, str);
6499 if (id == NULL) {
6500 xmlErrValidNodeNr(ctxt, NULL, XML_DTD_UNKNOWN_ID,
6501 "attribute %s line %d references an unknown ID \"%s\"\n",
6502 ref->name, ref->lineno, str);
6503 ctxt->valid = 0;
6504 }
6505 if (save == 0)
6506 break;
6507 *cur = save;
6508 while (IS_BLANK_CH(*cur)) cur++;
6509 }
6510 xmlFree(dup);
6511 } else if (attr->atype == XML_ATTRIBUTE_IDREF) {
6512 id = xmlGetID(ctxt->doc, name);
6513 if (id == NULL) {
6514 xmlErrValidNode(ctxt, attr->parent, XML_DTD_UNKNOWN_ID,
6515 "IDREF attribute %s references an unknown ID \"%s\"\n",
6516 attr->name, name, NULL);
6517 ctxt->valid = 0;
6518 }
6519 } else if (attr->atype == XML_ATTRIBUTE_IDREFS) {
6520 xmlChar *dup, *str = NULL, *cur, save;
6521
6522 dup = xmlStrdup(name);
6523 if (dup == NULL) {
6524 xmlVErrMemory(ctxt, "IDREFS split");
6525 ctxt->valid = 0;
6526 return;
6527 }
6528 cur = dup;
6529 while (*cur != 0) {
6530 str = cur;
6531 while ((*cur != 0) && (!IS_BLANK_CH(*cur))) cur++;
6532 save = *cur;
6533 *cur = 0;
6534 id = xmlGetID(ctxt->doc, str);
6535 if (id == NULL) {
6536 xmlErrValidNode(ctxt, attr->parent, XML_DTD_UNKNOWN_ID,
6537 "IDREFS attribute %s references an unknown ID \"%s\"\n",
6538 attr->name, str, NULL);
6539 ctxt->valid = 0;
6540 }
6541 if (save == 0)
6542 break;
6543 *cur = save;
6544 while (IS_BLANK_CH(*cur)) cur++;
6545 }
6546 xmlFree(dup);
6547 }
6548 }
6549
6550 /**
6551 * xmlWalkValidateList:
6552 * @data: Contents of current link
6553 * @user: Value supplied by the user
6554 *
6555 * Returns 0 to abort the walk or 1 to continue
6556 */
6557 static int
xmlWalkValidateList(const void * data,void * user)6558 xmlWalkValidateList(const void *data, void *user)
6559 {
6560 xmlValidateMemoPtr memo = (xmlValidateMemoPtr)user;
6561 xmlValidateRef((xmlRefPtr)data, memo->ctxt, memo->name);
6562 return 1;
6563 }
6564
6565 /**
6566 * xmlValidateCheckRefCallback:
6567 * @ref_list: List of references
6568 * @ctxt: Validation context
6569 * @name: Name of ID we are searching for
6570 *
6571 */
6572 static void
xmlValidateCheckRefCallback(void * payload,void * data,const xmlChar * name)6573 xmlValidateCheckRefCallback(void *payload, void *data, const xmlChar *name) {
6574 xmlListPtr ref_list = (xmlListPtr) payload;
6575 xmlValidCtxtPtr ctxt = (xmlValidCtxtPtr) data;
6576 xmlValidateMemo memo;
6577
6578 if (ref_list == NULL)
6579 return;
6580 memo.ctxt = ctxt;
6581 memo.name = name;
6582
6583 xmlListWalk(ref_list, xmlWalkValidateList, &memo);
6584
6585 }
6586
6587 /**
6588 * xmlValidateDocumentFinal:
6589 * @ctxt: the validation context
6590 * @doc: a document instance
6591 *
6592 * Does the final step for the document validation once all the
6593 * incremental validation steps have been completed
6594 *
6595 * basically it does the following checks described by the XML Rec
6596 *
6597 * Check all the IDREF/IDREFS attributes definition for validity
6598 *
6599 * returns 1 if valid or 0 otherwise
6600 */
6601
6602 int
xmlValidateDocumentFinal(xmlValidCtxtPtr ctxt,xmlDocPtr doc)6603 xmlValidateDocumentFinal(xmlValidCtxtPtr ctxt, xmlDocPtr doc) {
6604 xmlRefTablePtr table;
6605 unsigned int save;
6606
6607 if (ctxt == NULL)
6608 return(0);
6609 if (doc == NULL) {
6610 xmlErrValid(ctxt, XML_DTD_NO_DOC,
6611 "xmlValidateDocumentFinal: doc == NULL\n", NULL);
6612 return(0);
6613 }
6614
6615 /* trick to get correct line id report */
6616 save = ctxt->finishDtd;
6617 ctxt->finishDtd = 0;
6618
6619 /*
6620 * Check all the NOTATION/NOTATIONS attributes
6621 */
6622 /*
6623 * Check all the ENTITY/ENTITIES attributes definition for validity
6624 */
6625 /*
6626 * Check all the IDREF/IDREFS attributes definition for validity
6627 */
6628 table = (xmlRefTablePtr) doc->refs;
6629 ctxt->doc = doc;
6630 ctxt->valid = 1;
6631 xmlHashScan(table, xmlValidateCheckRefCallback, ctxt);
6632
6633 ctxt->finishDtd = save;
6634 return(ctxt->valid);
6635 }
6636
6637 /**
6638 * xmlValidateDtd:
6639 * @ctxt: the validation context
6640 * @doc: a document instance
6641 * @dtd: a dtd instance
6642 *
6643 * Try to validate the document against the dtd instance
6644 *
6645 * Basically it does check all the definitions in the DtD.
6646 * Note the the internal subset (if present) is de-coupled
6647 * (i.e. not used), which could give problems if ID or IDREF
6648 * is present.
6649 *
6650 * returns 1 if valid or 0 otherwise
6651 */
6652
6653 int
xmlValidateDtd(xmlValidCtxtPtr ctxt,xmlDocPtr doc,xmlDtdPtr dtd)6654 xmlValidateDtd(xmlValidCtxtPtr ctxt, xmlDocPtr doc, xmlDtdPtr dtd) {
6655 int ret;
6656 xmlDtdPtr oldExt, oldInt;
6657 xmlNodePtr root;
6658
6659 if (dtd == NULL) return(0);
6660 if (doc == NULL) return(0);
6661 oldExt = doc->extSubset;
6662 oldInt = doc->intSubset;
6663 doc->extSubset = dtd;
6664 doc->intSubset = NULL;
6665 ret = xmlValidateRoot(ctxt, doc);
6666 if (ret == 0) {
6667 doc->extSubset = oldExt;
6668 doc->intSubset = oldInt;
6669 return(ret);
6670 }
6671 if (doc->ids != NULL) {
6672 xmlFreeIDTable(doc->ids);
6673 doc->ids = NULL;
6674 }
6675 if (doc->refs != NULL) {
6676 xmlFreeRefTable(doc->refs);
6677 doc->refs = NULL;
6678 }
6679 root = xmlDocGetRootElement(doc);
6680 ret = xmlValidateElement(ctxt, doc, root);
6681 ret &= xmlValidateDocumentFinal(ctxt, doc);
6682 doc->extSubset = oldExt;
6683 doc->intSubset = oldInt;
6684 return(ret);
6685 }
6686
6687 static void
xmlValidateNotationCallback(void * payload,void * data,const xmlChar * name ATTRIBUTE_UNUSED)6688 xmlValidateNotationCallback(void *payload, void *data,
6689 const xmlChar *name ATTRIBUTE_UNUSED) {
6690 xmlEntityPtr cur = (xmlEntityPtr) payload;
6691 xmlValidCtxtPtr ctxt = (xmlValidCtxtPtr) data;
6692 if (cur == NULL)
6693 return;
6694 if (cur->etype == XML_EXTERNAL_GENERAL_UNPARSED_ENTITY) {
6695 xmlChar *notation = cur->content;
6696
6697 if (notation != NULL) {
6698 int ret;
6699
6700 ret = xmlValidateNotationUse(ctxt, cur->doc, notation);
6701 if (ret != 1) {
6702 ctxt->valid = 0;
6703 }
6704 }
6705 }
6706 }
6707
6708 static void
xmlValidateAttributeCallback(void * payload,void * data,const xmlChar * name ATTRIBUTE_UNUSED)6709 xmlValidateAttributeCallback(void *payload, void *data,
6710 const xmlChar *name ATTRIBUTE_UNUSED) {
6711 xmlAttributePtr cur = (xmlAttributePtr) payload;
6712 xmlValidCtxtPtr ctxt = (xmlValidCtxtPtr) data;
6713 int ret;
6714 xmlDocPtr doc;
6715 xmlElementPtr elem = NULL;
6716
6717 if (cur == NULL)
6718 return;
6719 switch (cur->atype) {
6720 case XML_ATTRIBUTE_CDATA:
6721 case XML_ATTRIBUTE_ID:
6722 case XML_ATTRIBUTE_IDREF :
6723 case XML_ATTRIBUTE_IDREFS:
6724 case XML_ATTRIBUTE_NMTOKEN:
6725 case XML_ATTRIBUTE_NMTOKENS:
6726 case XML_ATTRIBUTE_ENUMERATION:
6727 break;
6728 case XML_ATTRIBUTE_ENTITY:
6729 case XML_ATTRIBUTE_ENTITIES:
6730 case XML_ATTRIBUTE_NOTATION:
6731 if (cur->defaultValue != NULL) {
6732
6733 ret = xmlValidateAttributeValue2(ctxt, ctxt->doc, cur->name,
6734 cur->atype, cur->defaultValue);
6735 if ((ret == 0) && (ctxt->valid == 1))
6736 ctxt->valid = 0;
6737 }
6738 if (cur->tree != NULL) {
6739 xmlEnumerationPtr tree = cur->tree;
6740 while (tree != NULL) {
6741 ret = xmlValidateAttributeValue2(ctxt, ctxt->doc,
6742 cur->name, cur->atype, tree->name);
6743 if ((ret == 0) && (ctxt->valid == 1))
6744 ctxt->valid = 0;
6745 tree = tree->next;
6746 }
6747 }
6748 }
6749 if (cur->atype == XML_ATTRIBUTE_NOTATION) {
6750 doc = cur->doc;
6751 if (cur->elem == NULL) {
6752 xmlErrValid(ctxt, XML_ERR_INTERNAL_ERROR,
6753 "xmlValidateAttributeCallback(%s): internal error\n",
6754 (const char *) cur->name);
6755 return;
6756 }
6757
6758 if (doc != NULL)
6759 elem = xmlGetDtdElementDesc(doc->intSubset, cur->elem);
6760 if ((elem == NULL) && (doc != NULL))
6761 elem = xmlGetDtdElementDesc(doc->extSubset, cur->elem);
6762 if ((elem == NULL) && (cur->parent != NULL) &&
6763 (cur->parent->type == XML_DTD_NODE))
6764 elem = xmlGetDtdElementDesc((xmlDtdPtr) cur->parent, cur->elem);
6765 if (elem == NULL) {
6766 xmlErrValidNode(ctxt, NULL, XML_DTD_UNKNOWN_ELEM,
6767 "attribute %s: could not find decl for element %s\n",
6768 cur->name, cur->elem, NULL);
6769 return;
6770 }
6771 if (elem->etype == XML_ELEMENT_TYPE_EMPTY) {
6772 xmlErrValidNode(ctxt, NULL, XML_DTD_EMPTY_NOTATION,
6773 "NOTATION attribute %s declared for EMPTY element %s\n",
6774 cur->name, cur->elem, NULL);
6775 ctxt->valid = 0;
6776 }
6777 }
6778 }
6779
6780 /**
6781 * xmlValidateDtdFinal:
6782 * @ctxt: the validation context
6783 * @doc: a document instance
6784 *
6785 * Does the final step for the dtds validation once all the
6786 * subsets have been parsed
6787 *
6788 * basically it does the following checks described by the XML Rec
6789 * - check that ENTITY and ENTITIES type attributes default or
6790 * possible values matches one of the defined entities.
6791 * - check that NOTATION type attributes default or
6792 * possible values matches one of the defined notations.
6793 *
6794 * returns 1 if valid or 0 if invalid and -1 if not well-formed
6795 */
6796
6797 int
xmlValidateDtdFinal(xmlValidCtxtPtr ctxt,xmlDocPtr doc)6798 xmlValidateDtdFinal(xmlValidCtxtPtr ctxt, xmlDocPtr doc) {
6799 xmlDtdPtr dtd;
6800 xmlAttributeTablePtr table;
6801 xmlEntitiesTablePtr entities;
6802
6803 if ((doc == NULL) || (ctxt == NULL)) return(0);
6804 if ((doc->intSubset == NULL) && (doc->extSubset == NULL))
6805 return(0);
6806 ctxt->doc = doc;
6807 ctxt->valid = 1;
6808 dtd = doc->intSubset;
6809 if ((dtd != NULL) && (dtd->attributes != NULL)) {
6810 table = (xmlAttributeTablePtr) dtd->attributes;
6811 xmlHashScan(table, xmlValidateAttributeCallback, ctxt);
6812 }
6813 if ((dtd != NULL) && (dtd->entities != NULL)) {
6814 entities = (xmlEntitiesTablePtr) dtd->entities;
6815 xmlHashScan(entities, xmlValidateNotationCallback, ctxt);
6816 }
6817 dtd = doc->extSubset;
6818 if ((dtd != NULL) && (dtd->attributes != NULL)) {
6819 table = (xmlAttributeTablePtr) dtd->attributes;
6820 xmlHashScan(table, xmlValidateAttributeCallback, ctxt);
6821 }
6822 if ((dtd != NULL) && (dtd->entities != NULL)) {
6823 entities = (xmlEntitiesTablePtr) dtd->entities;
6824 xmlHashScan(entities, xmlValidateNotationCallback, ctxt);
6825 }
6826 return(ctxt->valid);
6827 }
6828
6829 /**
6830 * xmlValidateDocument:
6831 * @ctxt: the validation context
6832 * @doc: a document instance
6833 *
6834 * Try to validate the document instance
6835 *
6836 * basically it does the all the checks described by the XML Rec
6837 * i.e. validates the internal and external subset (if present)
6838 * and validate the document tree.
6839 *
6840 * returns 1 if valid or 0 otherwise
6841 */
6842
6843 int
xmlValidateDocument(xmlValidCtxtPtr ctxt,xmlDocPtr doc)6844 xmlValidateDocument(xmlValidCtxtPtr ctxt, xmlDocPtr doc) {
6845 int ret;
6846 xmlNodePtr root;
6847
6848 if (doc == NULL)
6849 return(0);
6850 if ((doc->intSubset == NULL) && (doc->extSubset == NULL)) {
6851 xmlErrValid(ctxt, XML_DTD_NO_DTD,
6852 "no DTD found!\n", NULL);
6853 return(0);
6854 }
6855 if ((doc->intSubset != NULL) && ((doc->intSubset->SystemID != NULL) ||
6856 (doc->intSubset->ExternalID != NULL)) && (doc->extSubset == NULL)) {
6857 xmlChar *sysID;
6858 if (doc->intSubset->SystemID != NULL) {
6859 sysID = xmlBuildURI(doc->intSubset->SystemID,
6860 doc->URL);
6861 if (sysID == NULL) {
6862 xmlErrValid(ctxt, XML_DTD_LOAD_ERROR,
6863 "Could not build URI for external subset \"%s\"\n",
6864 (const char *) doc->intSubset->SystemID);
6865 return 0;
6866 }
6867 } else
6868 sysID = NULL;
6869 doc->extSubset = xmlParseDTD(doc->intSubset->ExternalID,
6870 (const xmlChar *)sysID);
6871 if (sysID != NULL)
6872 xmlFree(sysID);
6873 if (doc->extSubset == NULL) {
6874 if (doc->intSubset->SystemID != NULL) {
6875 xmlErrValid(ctxt, XML_DTD_LOAD_ERROR,
6876 "Could not load the external subset \"%s\"\n",
6877 (const char *) doc->intSubset->SystemID);
6878 } else {
6879 xmlErrValid(ctxt, XML_DTD_LOAD_ERROR,
6880 "Could not load the external subset \"%s\"\n",
6881 (const char *) doc->intSubset->ExternalID);
6882 }
6883 return(0);
6884 }
6885 }
6886
6887 if (doc->ids != NULL) {
6888 xmlFreeIDTable(doc->ids);
6889 doc->ids = NULL;
6890 }
6891 if (doc->refs != NULL) {
6892 xmlFreeRefTable(doc->refs);
6893 doc->refs = NULL;
6894 }
6895 ret = xmlValidateDtdFinal(ctxt, doc);
6896 if (!xmlValidateRoot(ctxt, doc)) return(0);
6897
6898 root = xmlDocGetRootElement(doc);
6899 ret &= xmlValidateElement(ctxt, doc, root);
6900 ret &= xmlValidateDocumentFinal(ctxt, doc);
6901 return(ret);
6902 }
6903
6904 /************************************************************************
6905 * *
6906 * Routines for dynamic validation editing *
6907 * *
6908 ************************************************************************/
6909
6910 /**
6911 * xmlValidGetPotentialChildren:
6912 * @ctree: an element content tree
6913 * @names: an array to store the list of child names
6914 * @len: a pointer to the number of element in the list
6915 * @max: the size of the array
6916 *
6917 * Build/extend a list of potential children allowed by the content tree
6918 *
6919 * returns the number of element in the list, or -1 in case of error.
6920 */
6921
6922 int
xmlValidGetPotentialChildren(xmlElementContent * ctree,const xmlChar ** names,int * len,int max)6923 xmlValidGetPotentialChildren(xmlElementContent *ctree,
6924 const xmlChar **names,
6925 int *len, int max) {
6926 int i;
6927
6928 if ((ctree == NULL) || (names == NULL) || (len == NULL))
6929 return(-1);
6930 if (*len >= max) return(*len);
6931
6932 switch (ctree->type) {
6933 case XML_ELEMENT_CONTENT_PCDATA:
6934 for (i = 0; i < *len;i++)
6935 if (xmlStrEqual(BAD_CAST "#PCDATA", names[i])) return(*len);
6936 names[(*len)++] = BAD_CAST "#PCDATA";
6937 break;
6938 case XML_ELEMENT_CONTENT_ELEMENT:
6939 for (i = 0; i < *len;i++)
6940 if (xmlStrEqual(ctree->name, names[i])) return(*len);
6941 names[(*len)++] = ctree->name;
6942 break;
6943 case XML_ELEMENT_CONTENT_SEQ:
6944 xmlValidGetPotentialChildren(ctree->c1, names, len, max);
6945 xmlValidGetPotentialChildren(ctree->c2, names, len, max);
6946 break;
6947 case XML_ELEMENT_CONTENT_OR:
6948 xmlValidGetPotentialChildren(ctree->c1, names, len, max);
6949 xmlValidGetPotentialChildren(ctree->c2, names, len, max);
6950 break;
6951 }
6952
6953 return(*len);
6954 }
6955
6956 /*
6957 * Dummy function to suppress messages while we try out valid elements
6958 */
xmlNoValidityErr(void * ctx ATTRIBUTE_UNUSED,const char * msg ATTRIBUTE_UNUSED,...)6959 static void XMLCDECL xmlNoValidityErr(void *ctx ATTRIBUTE_UNUSED,
6960 const char *msg ATTRIBUTE_UNUSED, ...) {
6961 return;
6962 }
6963
6964 /**
6965 * xmlValidGetValidElements:
6966 * @prev: an element to insert after
6967 * @next: an element to insert next
6968 * @names: an array to store the list of child names
6969 * @max: the size of the array
6970 *
6971 * This function returns the list of authorized children to insert
6972 * within an existing tree while respecting the validity constraints
6973 * forced by the Dtd. The insertion point is defined using @prev and
6974 * @next in the following ways:
6975 * to insert before 'node': xmlValidGetValidElements(node->prev, node, ...
6976 * to insert next 'node': xmlValidGetValidElements(node, node->next, ...
6977 * to replace 'node': xmlValidGetValidElements(node->prev, node->next, ...
6978 * to prepend a child to 'node': xmlValidGetValidElements(NULL, node->childs,
6979 * to append a child to 'node': xmlValidGetValidElements(node->last, NULL, ...
6980 *
6981 * pointers to the element names are inserted at the beginning of the array
6982 * and do not need to be freed.
6983 *
6984 * returns the number of element in the list, or -1 in case of error. If
6985 * the function returns the value @max the caller is invited to grow the
6986 * receiving array and retry.
6987 */
6988
6989 int
xmlValidGetValidElements(xmlNode * prev,xmlNode * next,const xmlChar ** names,int max)6990 xmlValidGetValidElements(xmlNode *prev, xmlNode *next, const xmlChar **names,
6991 int max) {
6992 xmlValidCtxt vctxt;
6993 int nb_valid_elements = 0;
6994 const xmlChar *elements[256]={0};
6995 int nb_elements = 0, i;
6996 const xmlChar *name;
6997
6998 xmlNode *ref_node;
6999 xmlNode *parent;
7000 xmlNode *test_node;
7001
7002 xmlNode *prev_next;
7003 xmlNode *next_prev;
7004 xmlNode *parent_childs;
7005 xmlNode *parent_last;
7006
7007 xmlElement *element_desc;
7008
7009 if (prev == NULL && next == NULL)
7010 return(-1);
7011
7012 if (names == NULL) return(-1);
7013 if (max <= 0) return(-1);
7014
7015 memset(&vctxt, 0, sizeof (xmlValidCtxt));
7016 vctxt.error = xmlNoValidityErr; /* this suppresses err/warn output */
7017
7018 nb_valid_elements = 0;
7019 ref_node = prev ? prev : next;
7020 parent = ref_node->parent;
7021
7022 /*
7023 * Retrieves the parent element declaration
7024 */
7025 element_desc = xmlGetDtdElementDesc(parent->doc->intSubset,
7026 parent->name);
7027 if ((element_desc == NULL) && (parent->doc->extSubset != NULL))
7028 element_desc = xmlGetDtdElementDesc(parent->doc->extSubset,
7029 parent->name);
7030 if (element_desc == NULL) return(-1);
7031
7032 /*
7033 * Do a backup of the current tree structure
7034 */
7035 prev_next = prev ? prev->next : NULL;
7036 next_prev = next ? next->prev : NULL;
7037 parent_childs = parent->children;
7038 parent_last = parent->last;
7039
7040 /*
7041 * Creates a dummy node and insert it into the tree
7042 */
7043 test_node = xmlNewDocNode (ref_node->doc, NULL, BAD_CAST "<!dummy?>", NULL);
7044 if (test_node == NULL)
7045 return(-1);
7046
7047 test_node->parent = parent;
7048 test_node->prev = prev;
7049 test_node->next = next;
7050 name = test_node->name;
7051
7052 if (prev) prev->next = test_node;
7053 else parent->children = test_node;
7054
7055 if (next) next->prev = test_node;
7056 else parent->last = test_node;
7057
7058 /*
7059 * Insert each potential child node and check if the parent is
7060 * still valid
7061 */
7062 nb_elements = xmlValidGetPotentialChildren(element_desc->content,
7063 elements, &nb_elements, 256);
7064
7065 for (i = 0;i < nb_elements;i++) {
7066 test_node->name = elements[i];
7067 if (xmlValidateOneElement(&vctxt, parent->doc, parent)) {
7068 int j;
7069
7070 for (j = 0; j < nb_valid_elements;j++)
7071 if (xmlStrEqual(elements[i], names[j])) break;
7072 names[nb_valid_elements++] = elements[i];
7073 if (nb_valid_elements >= max) break;
7074 }
7075 }
7076
7077 /*
7078 * Restore the tree structure
7079 */
7080 if (prev) prev->next = prev_next;
7081 if (next) next->prev = next_prev;
7082 parent->children = parent_childs;
7083 parent->last = parent_last;
7084
7085 /*
7086 * Free up the dummy node
7087 */
7088 test_node->name = name;
7089 xmlFreeNode(test_node);
7090
7091 return(nb_valid_elements);
7092 }
7093 #endif /* LIBXML_VALID_ENABLED */
7094
7095 #define bottom_valid
7096 #include "elfgcchack.h"
7097