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