1/* 2 * xpointer.c : Code to handle XML Pointer 3 * 4 * Base implementation was made accordingly to 5 * W3C Candidate Recommendation 7 June 2000 6 * http://www.w3.org/TR/2000/CR-xptr-20000607 7 * 8 * Added support for the element() scheme described in: 9 * W3C Proposed Recommendation 13 November 2002 10 * http://www.w3.org/TR/2002/PR-xptr-element-20021113/ 11 * 12 * See Copyright for the status of this software. 13 * 14 * daniel@veillard.com 15 */ 16 17#define IN_LIBXML 18#include "libxml.h" 19 20/* 21 * TODO: better handling of error cases, the full expression should 22 * be parsed beforehand instead of a progressive evaluation 23 * TODO: Access into entities references are not supported now ... 24 * need a start to be able to pop out of entities refs since 25 * parent is the endity declaration, not the ref. 26 */ 27 28#include <string.h> 29#include <libxml/xpointer.h> 30#include <libxml/xmlmemory.h> 31#include <libxml/parserInternals.h> 32#include <libxml/uri.h> 33#include <libxml/xpath.h> 34#include <libxml/xpathInternals.h> 35#include <libxml/xmlerror.h> 36#include <libxml/globals.h> 37 38#ifdef LIBXML_XPTR_ENABLED 39 40/* Add support of the xmlns() xpointer scheme to initialize the namespaces */ 41#define XPTR_XMLNS_SCHEME 42 43/* #define DEBUG_RANGES */ 44#ifdef DEBUG_RANGES 45#ifdef LIBXML_DEBUG_ENABLED 46#include <libxml/debugXML.h> 47#endif 48#endif 49 50#define TODO \ 51 xmlGenericError(xmlGenericErrorContext, \ 52 "Unimplemented block at %s:%d\n", \ 53 __FILE__, __LINE__); 54 55#define STRANGE \ 56 xmlGenericError(xmlGenericErrorContext, \ 57 "Internal error at %s:%d\n", \ 58 __FILE__, __LINE__); 59 60/************************************************************************ 61 * * 62 * Some factorized error routines * 63 * * 64 ************************************************************************/ 65 66/** 67 * xmlXPtrErrMemory: 68 * @extra: extra informations 69 * 70 * Handle a redefinition of attribute error 71 */ 72static void 73xmlXPtrErrMemory(const char *extra) 74{ 75 __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_XPOINTER, 76 XML_ERR_NO_MEMORY, XML_ERR_ERROR, NULL, 0, extra, 77 NULL, NULL, 0, 0, 78 "Memory allocation failed : %s\n", extra); 79} 80 81/** 82 * xmlXPtrErr: 83 * @ctxt: an XPTR evaluation context 84 * @extra: extra informations 85 * 86 * Handle a redefinition of attribute error 87 */ 88static void 89xmlXPtrErr(xmlXPathParserContextPtr ctxt, int error, 90 const char * msg, const xmlChar *extra) 91{ 92 if (ctxt != NULL) 93 ctxt->error = error; 94 if ((ctxt == NULL) || (ctxt->context == NULL)) { 95 __xmlRaiseError(NULL, NULL, NULL, 96 NULL, NULL, XML_FROM_XPOINTER, error, 97 XML_ERR_ERROR, NULL, 0, 98 (const char *) extra, NULL, NULL, 0, 0, 99 msg, extra); 100 return; 101 } 102 ctxt->context->lastError.domain = XML_FROM_XPOINTER; 103 ctxt->context->lastError.code = error; 104 ctxt->context->lastError.level = XML_ERR_ERROR; 105 ctxt->context->lastError.str1 = (char *) xmlStrdup(ctxt->base); 106 ctxt->context->lastError.int1 = ctxt->cur - ctxt->base; 107 ctxt->context->lastError.node = ctxt->context->debugNode; 108 if (ctxt->context->error != NULL) { 109 ctxt->context->error(ctxt->context->userData, 110 &ctxt->context->lastError); 111 } else { 112 __xmlRaiseError(NULL, NULL, NULL, 113 NULL, ctxt->context->debugNode, XML_FROM_XPOINTER, 114 error, XML_ERR_ERROR, NULL, 0, 115 (const char *) extra, (const char *) ctxt->base, NULL, 116 ctxt->cur - ctxt->base, 0, 117 msg, extra); 118 } 119} 120 121/************************************************************************ 122 * * 123 * A few helper functions for child sequences * 124 * * 125 ************************************************************************/ 126/* xmlXPtrAdvanceNode is a private function, but used by xinclude.c */ 127xmlNodePtr xmlXPtrAdvanceNode(xmlNodePtr cur, int *level); 128/** 129 * xmlXPtrGetArity: 130 * @cur: the node 131 * 132 * Returns the number of child for an element, -1 in case of error 133 */ 134static int 135xmlXPtrGetArity(xmlNodePtr cur) { 136 int i; 137 if ((cur == NULL) || (cur->type == XML_NAMESPACE_DECL)) 138 return(-1); 139 cur = cur->children; 140 for (i = 0;cur != NULL;cur = cur->next) { 141 if ((cur->type == XML_ELEMENT_NODE) || 142 (cur->type == XML_DOCUMENT_NODE) || 143 (cur->type == XML_HTML_DOCUMENT_NODE)) { 144 i++; 145 } 146 } 147 return(i); 148} 149 150/** 151 * xmlXPtrGetIndex: 152 * @cur: the node 153 * 154 * Returns the index of the node in its parent children list, -1 155 * in case of error 156 */ 157static int 158xmlXPtrGetIndex(xmlNodePtr cur) { 159 int i; 160 if ((cur == NULL) || (cur->type == XML_NAMESPACE_DECL)) 161 return(-1); 162 for (i = 1;cur != NULL;cur = cur->prev) { 163 if ((cur->type == XML_ELEMENT_NODE) || 164 (cur->type == XML_DOCUMENT_NODE) || 165 (cur->type == XML_HTML_DOCUMENT_NODE)) { 166 i++; 167 } 168 } 169 return(i); 170} 171 172/** 173 * xmlXPtrGetNthChild: 174 * @cur: the node 175 * @no: the child number 176 * 177 * Returns the @no'th element child of @cur or NULL 178 */ 179static xmlNodePtr 180xmlXPtrGetNthChild(xmlNodePtr cur, int no) { 181 int i; 182 if ((cur == NULL) || (cur->type == XML_NAMESPACE_DECL)) 183 return(cur); 184 cur = cur->children; 185 for (i = 0;i <= no;cur = cur->next) { 186 if (cur == NULL) 187 return(cur); 188 if ((cur->type == XML_ELEMENT_NODE) || 189 (cur->type == XML_DOCUMENT_NODE) || 190 (cur->type == XML_HTML_DOCUMENT_NODE)) { 191 i++; 192 if (i == no) 193 break; 194 } 195 } 196 return(cur); 197} 198 199/************************************************************************ 200 * * 201 * Handling of XPointer specific types * 202 * * 203 ************************************************************************/ 204 205/** 206 * xmlXPtrCmpPoints: 207 * @node1: the first node 208 * @index1: the first index 209 * @node2: the second node 210 * @index2: the second index 211 * 212 * Compare two points w.r.t document order 213 * 214 * Returns -2 in case of error 1 if first point < second point, 0 if 215 * that's the same point, -1 otherwise 216 */ 217static int 218xmlXPtrCmpPoints(xmlNodePtr node1, int index1, xmlNodePtr node2, int index2) { 219 if ((node1 == NULL) || (node2 == NULL)) 220 return(-2); 221 /* 222 * a couple of optimizations which will avoid computations in most cases 223 */ 224 if (node1 == node2) { 225 if (index1 < index2) 226 return(1); 227 if (index1 > index2) 228 return(-1); 229 return(0); 230 } 231 return(xmlXPathCmpNodes(node1, node2)); 232} 233 234/** 235 * xmlXPtrNewPoint: 236 * @node: the xmlNodePtr 237 * @indx: the indx within the node 238 * 239 * Create a new xmlXPathObjectPtr of type point 240 * 241 * Returns the newly created object. 242 */ 243static xmlXPathObjectPtr 244xmlXPtrNewPoint(xmlNodePtr node, int indx) { 245 xmlXPathObjectPtr ret; 246 247 if (node == NULL) 248 return(NULL); 249 if (indx < 0) 250 return(NULL); 251 252 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); 253 if (ret == NULL) { 254 xmlXPtrErrMemory("allocating point"); 255 return(NULL); 256 } 257 memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); 258 ret->type = XPATH_POINT; 259 ret->user = (void *) node; 260 ret->index = indx; 261 return(ret); 262} 263 264/** 265 * xmlXPtrRangeCheckOrder: 266 * @range: an object range 267 * 268 * Make sure the points in the range are in the right order 269 */ 270static void 271xmlXPtrRangeCheckOrder(xmlXPathObjectPtr range) { 272 int tmp; 273 xmlNodePtr tmp2; 274 if (range == NULL) 275 return; 276 if (range->type != XPATH_RANGE) 277 return; 278 if (range->user2 == NULL) 279 return; 280 tmp = xmlXPtrCmpPoints(range->user, range->index, 281 range->user2, range->index2); 282 if (tmp == -1) { 283 tmp2 = range->user; 284 range->user = range->user2; 285 range->user2 = tmp2; 286 tmp = range->index; 287 range->index = range->index2; 288 range->index2 = tmp; 289 } 290} 291 292/** 293 * xmlXPtrRangesEqual: 294 * @range1: the first range 295 * @range2: the second range 296 * 297 * Compare two ranges 298 * 299 * Returns 1 if equal, 0 otherwise 300 */ 301static int 302xmlXPtrRangesEqual(xmlXPathObjectPtr range1, xmlXPathObjectPtr range2) { 303 if (range1 == range2) 304 return(1); 305 if ((range1 == NULL) || (range2 == NULL)) 306 return(0); 307 if (range1->type != range2->type) 308 return(0); 309 if (range1->type != XPATH_RANGE) 310 return(0); 311 if (range1->user != range2->user) 312 return(0); 313 if (range1->index != range2->index) 314 return(0); 315 if (range1->user2 != range2->user2) 316 return(0); 317 if (range1->index2 != range2->index2) 318 return(0); 319 return(1); 320} 321 322/** 323 * xmlXPtrNewRange: 324 * @start: the starting node 325 * @startindex: the start index 326 * @end: the ending point 327 * @endindex: the ending index 328 * 329 * Create a new xmlXPathObjectPtr of type range 330 * 331 * Returns the newly created object. 332 */ 333xmlXPathObjectPtr 334xmlXPtrNewRange(xmlNodePtr start, int startindex, 335 xmlNodePtr end, int endindex) { 336 xmlXPathObjectPtr ret; 337 338 if (start == NULL) 339 return(NULL); 340 if (end == NULL) 341 return(NULL); 342 if (startindex < 0) 343 return(NULL); 344 if (endindex < 0) 345 return(NULL); 346 347 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); 348 if (ret == NULL) { 349 xmlXPtrErrMemory("allocating range"); 350 return(NULL); 351 } 352 memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); 353 ret->type = XPATH_RANGE; 354 ret->user = start; 355 ret->index = startindex; 356 ret->user2 = end; 357 ret->index2 = endindex; 358 xmlXPtrRangeCheckOrder(ret); 359 return(ret); 360} 361 362/** 363 * xmlXPtrNewRangePoints: 364 * @start: the starting point 365 * @end: the ending point 366 * 367 * Create a new xmlXPathObjectPtr of type range using 2 Points 368 * 369 * Returns the newly created object. 370 */ 371xmlXPathObjectPtr 372xmlXPtrNewRangePoints(xmlXPathObjectPtr start, xmlXPathObjectPtr end) { 373 xmlXPathObjectPtr ret; 374 375 if (start == NULL) 376 return(NULL); 377 if (end == NULL) 378 return(NULL); 379 if (start->type != XPATH_POINT) 380 return(NULL); 381 if (end->type != XPATH_POINT) 382 return(NULL); 383 384 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); 385 if (ret == NULL) { 386 xmlXPtrErrMemory("allocating range"); 387 return(NULL); 388 } 389 memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); 390 ret->type = XPATH_RANGE; 391 ret->user = start->user; 392 ret->index = start->index; 393 ret->user2 = end->user; 394 ret->index2 = end->index; 395 xmlXPtrRangeCheckOrder(ret); 396 return(ret); 397} 398 399/** 400 * xmlXPtrNewRangePointNode: 401 * @start: the starting point 402 * @end: the ending node 403 * 404 * Create a new xmlXPathObjectPtr of type range from a point to a node 405 * 406 * Returns the newly created object. 407 */ 408xmlXPathObjectPtr 409xmlXPtrNewRangePointNode(xmlXPathObjectPtr start, xmlNodePtr end) { 410 xmlXPathObjectPtr ret; 411 412 if (start == NULL) 413 return(NULL); 414 if (end == NULL) 415 return(NULL); 416 if (start->type != XPATH_POINT) 417 return(NULL); 418 419 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); 420 if (ret == NULL) { 421 xmlXPtrErrMemory("allocating range"); 422 return(NULL); 423 } 424 memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); 425 ret->type = XPATH_RANGE; 426 ret->user = start->user; 427 ret->index = start->index; 428 ret->user2 = end; 429 ret->index2 = -1; 430 xmlXPtrRangeCheckOrder(ret); 431 return(ret); 432} 433 434/** 435 * xmlXPtrNewRangeNodePoint: 436 * @start: the starting node 437 * @end: the ending point 438 * 439 * Create a new xmlXPathObjectPtr of type range from a node to a point 440 * 441 * Returns the newly created object. 442 */ 443xmlXPathObjectPtr 444xmlXPtrNewRangeNodePoint(xmlNodePtr start, xmlXPathObjectPtr end) { 445 xmlXPathObjectPtr ret; 446 447 if (start == NULL) 448 return(NULL); 449 if (end == NULL) 450 return(NULL); 451 if (start->type != XPATH_POINT) 452 return(NULL); 453 if (end->type != XPATH_POINT) 454 return(NULL); 455 456 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); 457 if (ret == NULL) { 458 xmlXPtrErrMemory("allocating range"); 459 return(NULL); 460 } 461 memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); 462 ret->type = XPATH_RANGE; 463 ret->user = start; 464 ret->index = -1; 465 ret->user2 = end->user; 466 ret->index2 = end->index; 467 xmlXPtrRangeCheckOrder(ret); 468 return(ret); 469} 470 471/** 472 * xmlXPtrNewRangeNodes: 473 * @start: the starting node 474 * @end: the ending node 475 * 476 * Create a new xmlXPathObjectPtr of type range using 2 nodes 477 * 478 * Returns the newly created object. 479 */ 480xmlXPathObjectPtr 481xmlXPtrNewRangeNodes(xmlNodePtr start, xmlNodePtr end) { 482 xmlXPathObjectPtr ret; 483 484 if (start == NULL) 485 return(NULL); 486 if (end == NULL) 487 return(NULL); 488 489 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); 490 if (ret == NULL) { 491 xmlXPtrErrMemory("allocating range"); 492 return(NULL); 493 } 494 memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); 495 ret->type = XPATH_RANGE; 496 ret->user = start; 497 ret->index = -1; 498 ret->user2 = end; 499 ret->index2 = -1; 500 xmlXPtrRangeCheckOrder(ret); 501 return(ret); 502} 503 504/** 505 * xmlXPtrNewCollapsedRange: 506 * @start: the starting and ending node 507 * 508 * Create a new xmlXPathObjectPtr of type range using a single nodes 509 * 510 * Returns the newly created object. 511 */ 512xmlXPathObjectPtr 513xmlXPtrNewCollapsedRange(xmlNodePtr start) { 514 xmlXPathObjectPtr ret; 515 516 if (start == NULL) 517 return(NULL); 518 519 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); 520 if (ret == NULL) { 521 xmlXPtrErrMemory("allocating range"); 522 return(NULL); 523 } 524 memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); 525 ret->type = XPATH_RANGE; 526 ret->user = start; 527 ret->index = -1; 528 ret->user2 = NULL; 529 ret->index2 = -1; 530 return(ret); 531} 532 533/** 534 * xmlXPtrNewRangeNodeObject: 535 * @start: the starting node 536 * @end: the ending object 537 * 538 * Create a new xmlXPathObjectPtr of type range from a not to an object 539 * 540 * Returns the newly created object. 541 */ 542xmlXPathObjectPtr 543xmlXPtrNewRangeNodeObject(xmlNodePtr start, xmlXPathObjectPtr end) { 544 xmlXPathObjectPtr ret; 545 546 if (start == NULL) 547 return(NULL); 548 if (end == NULL) 549 return(NULL); 550 switch (end->type) { 551 case XPATH_POINT: 552 case XPATH_RANGE: 553 break; 554 case XPATH_NODESET: 555 /* 556 * Empty set ... 557 */ 558 if (end->nodesetval->nodeNr <= 0) 559 return(NULL); 560 break; 561 default: 562 /* TODO */ 563 return(NULL); 564 } 565 566 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); 567 if (ret == NULL) { 568 xmlXPtrErrMemory("allocating range"); 569 return(NULL); 570 } 571 memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); 572 ret->type = XPATH_RANGE; 573 ret->user = start; 574 ret->index = -1; 575 switch (end->type) { 576 case XPATH_POINT: 577 ret->user2 = end->user; 578 ret->index2 = end->index; 579 break; 580 case XPATH_RANGE: 581 ret->user2 = end->user2; 582 ret->index2 = end->index2; 583 break; 584 case XPATH_NODESET: { 585 ret->user2 = end->nodesetval->nodeTab[end->nodesetval->nodeNr - 1]; 586 ret->index2 = -1; 587 break; 588 } 589 default: 590 STRANGE 591 return(NULL); 592 } 593 xmlXPtrRangeCheckOrder(ret); 594 return(ret); 595} 596 597#define XML_RANGESET_DEFAULT 10 598 599/** 600 * xmlXPtrLocationSetCreate: 601 * @val: an initial xmlXPathObjectPtr, or NULL 602 * 603 * Create a new xmlLocationSetPtr of type double and of value @val 604 * 605 * Returns the newly created object. 606 */ 607xmlLocationSetPtr 608xmlXPtrLocationSetCreate(xmlXPathObjectPtr val) { 609 xmlLocationSetPtr ret; 610 611 ret = (xmlLocationSetPtr) xmlMalloc(sizeof(xmlLocationSet)); 612 if (ret == NULL) { 613 xmlXPtrErrMemory("allocating locationset"); 614 return(NULL); 615 } 616 memset(ret, 0 , (size_t) sizeof(xmlLocationSet)); 617 if (val != NULL) { 618 ret->locTab = (xmlXPathObjectPtr *) xmlMalloc(XML_RANGESET_DEFAULT * 619 sizeof(xmlXPathObjectPtr)); 620 if (ret->locTab == NULL) { 621 xmlXPtrErrMemory("allocating locationset"); 622 xmlFree(ret); 623 return(NULL); 624 } 625 memset(ret->locTab, 0 , 626 XML_RANGESET_DEFAULT * (size_t) sizeof(xmlXPathObjectPtr)); 627 ret->locMax = XML_RANGESET_DEFAULT; 628 ret->locTab[ret->locNr++] = val; 629 } 630 return(ret); 631} 632 633/** 634 * xmlXPtrLocationSetAdd: 635 * @cur: the initial range set 636 * @val: a new xmlXPathObjectPtr 637 * 638 * add a new xmlXPathObjectPtr to an existing LocationSet 639 * If the location already exist in the set @val is freed. 640 */ 641void 642xmlXPtrLocationSetAdd(xmlLocationSetPtr cur, xmlXPathObjectPtr val) { 643 int i; 644 645 if ((cur == NULL) || (val == NULL)) return; 646 647 /* 648 * check against doublons 649 */ 650 for (i = 0;i < cur->locNr;i++) { 651 if (xmlXPtrRangesEqual(cur->locTab[i], val)) { 652 xmlXPathFreeObject(val); 653 return; 654 } 655 } 656 657 /* 658 * grow the locTab if needed 659 */ 660 if (cur->locMax == 0) { 661 cur->locTab = (xmlXPathObjectPtr *) xmlMalloc(XML_RANGESET_DEFAULT * 662 sizeof(xmlXPathObjectPtr)); 663 if (cur->locTab == NULL) { 664 xmlXPtrErrMemory("adding location to set"); 665 return; 666 } 667 memset(cur->locTab, 0 , 668 XML_RANGESET_DEFAULT * (size_t) sizeof(xmlXPathObjectPtr)); 669 cur->locMax = XML_RANGESET_DEFAULT; 670 } else if (cur->locNr == cur->locMax) { 671 xmlXPathObjectPtr *temp; 672 673 cur->locMax *= 2; 674 temp = (xmlXPathObjectPtr *) xmlRealloc(cur->locTab, cur->locMax * 675 sizeof(xmlXPathObjectPtr)); 676 if (temp == NULL) { 677 xmlXPtrErrMemory("adding location to set"); 678 return; 679 } 680 cur->locTab = temp; 681 } 682 cur->locTab[cur->locNr++] = val; 683} 684 685/** 686 * xmlXPtrLocationSetMerge: 687 * @val1: the first LocationSet 688 * @val2: the second LocationSet 689 * 690 * Merges two rangesets, all ranges from @val2 are added to @val1 691 * 692 * Returns val1 once extended or NULL in case of error. 693 */ 694xmlLocationSetPtr 695xmlXPtrLocationSetMerge(xmlLocationSetPtr val1, xmlLocationSetPtr val2) { 696 int i; 697 698 if (val1 == NULL) return(NULL); 699 if (val2 == NULL) return(val1); 700 701 /* 702 * !!!!! this can be optimized a lot, knowing that both 703 * val1 and val2 already have unicity of their values. 704 */ 705 706 for (i = 0;i < val2->locNr;i++) 707 xmlXPtrLocationSetAdd(val1, val2->locTab[i]); 708 709 return(val1); 710} 711 712/** 713 * xmlXPtrLocationSetDel: 714 * @cur: the initial range set 715 * @val: an xmlXPathObjectPtr 716 * 717 * Removes an xmlXPathObjectPtr from an existing LocationSet 718 */ 719void 720xmlXPtrLocationSetDel(xmlLocationSetPtr cur, xmlXPathObjectPtr val) { 721 int i; 722 723 if (cur == NULL) return; 724 if (val == NULL) return; 725 726 /* 727 * check against doublons 728 */ 729 for (i = 0;i < cur->locNr;i++) 730 if (cur->locTab[i] == val) break; 731 732 if (i >= cur->locNr) { 733#ifdef DEBUG 734 xmlGenericError(xmlGenericErrorContext, 735 "xmlXPtrLocationSetDel: Range wasn't found in RangeList\n"); 736#endif 737 return; 738 } 739 cur->locNr--; 740 for (;i < cur->locNr;i++) 741 cur->locTab[i] = cur->locTab[i + 1]; 742 cur->locTab[cur->locNr] = NULL; 743} 744 745/** 746 * xmlXPtrLocationSetRemove: 747 * @cur: the initial range set 748 * @val: the index to remove 749 * 750 * Removes an entry from an existing LocationSet list. 751 */ 752void 753xmlXPtrLocationSetRemove(xmlLocationSetPtr cur, int val) { 754 if (cur == NULL) return; 755 if (val >= cur->locNr) return; 756 cur->locNr--; 757 for (;val < cur->locNr;val++) 758 cur->locTab[val] = cur->locTab[val + 1]; 759 cur->locTab[cur->locNr] = NULL; 760} 761 762/** 763 * xmlXPtrFreeLocationSet: 764 * @obj: the xmlLocationSetPtr to free 765 * 766 * Free the LocationSet compound (not the actual ranges !). 767 */ 768void 769xmlXPtrFreeLocationSet(xmlLocationSetPtr obj) { 770 int i; 771 772 if (obj == NULL) return; 773 if (obj->locTab != NULL) { 774 for (i = 0;i < obj->locNr; i++) { 775 xmlXPathFreeObject(obj->locTab[i]); 776 } 777 xmlFree(obj->locTab); 778 } 779 xmlFree(obj); 780} 781 782/** 783 * xmlXPtrNewLocationSetNodes: 784 * @start: the start NodePtr value 785 * @end: the end NodePtr value or NULL 786 * 787 * Create a new xmlXPathObjectPtr of type LocationSet and initialize 788 * it with the single range made of the two nodes @start and @end 789 * 790 * Returns the newly created object. 791 */ 792xmlXPathObjectPtr 793xmlXPtrNewLocationSetNodes(xmlNodePtr start, xmlNodePtr end) { 794 xmlXPathObjectPtr ret; 795 796 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); 797 if (ret == NULL) { 798 xmlXPtrErrMemory("allocating locationset"); 799 return(NULL); 800 } 801 memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); 802 ret->type = XPATH_LOCATIONSET; 803 if (end == NULL) 804 ret->user = xmlXPtrLocationSetCreate(xmlXPtrNewCollapsedRange(start)); 805 else 806 ret->user = xmlXPtrLocationSetCreate(xmlXPtrNewRangeNodes(start,end)); 807 return(ret); 808} 809 810/** 811 * xmlXPtrNewLocationSetNodeSet: 812 * @set: a node set 813 * 814 * Create a new xmlXPathObjectPtr of type LocationSet and initialize 815 * it with all the nodes from @set 816 * 817 * Returns the newly created object. 818 */ 819xmlXPathObjectPtr 820xmlXPtrNewLocationSetNodeSet(xmlNodeSetPtr set) { 821 xmlXPathObjectPtr ret; 822 823 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); 824 if (ret == NULL) { 825 xmlXPtrErrMemory("allocating locationset"); 826 return(NULL); 827 } 828 memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); 829 ret->type = XPATH_LOCATIONSET; 830 if (set != NULL) { 831 int i; 832 xmlLocationSetPtr newset; 833 834 newset = xmlXPtrLocationSetCreate(NULL); 835 if (newset == NULL) 836 return(ret); 837 838 for (i = 0;i < set->nodeNr;i++) 839 xmlXPtrLocationSetAdd(newset, 840 xmlXPtrNewCollapsedRange(set->nodeTab[i])); 841 842 ret->user = (void *) newset; 843 } 844 return(ret); 845} 846 847/** 848 * xmlXPtrWrapLocationSet: 849 * @val: the LocationSet value 850 * 851 * Wrap the LocationSet @val in a new xmlXPathObjectPtr 852 * 853 * Returns the newly created object. 854 */ 855xmlXPathObjectPtr 856xmlXPtrWrapLocationSet(xmlLocationSetPtr val) { 857 xmlXPathObjectPtr ret; 858 859 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); 860 if (ret == NULL) { 861 xmlXPtrErrMemory("allocating locationset"); 862 return(NULL); 863 } 864 memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); 865 ret->type = XPATH_LOCATIONSET; 866 ret->user = (void *) val; 867 return(ret); 868} 869 870/************************************************************************ 871 * * 872 * The parser * 873 * * 874 ************************************************************************/ 875 876static void xmlXPtrEvalChildSeq(xmlXPathParserContextPtr ctxt, xmlChar *name); 877 878/* 879 * Macros for accessing the content. Those should be used only by the parser, 880 * and not exported. 881 * 882 * Dirty macros, i.e. one need to make assumption on the context to use them 883 * 884 * CUR_PTR return the current pointer to the xmlChar to be parsed. 885 * CUR returns the current xmlChar value, i.e. a 8 bit value 886 * in ISO-Latin or UTF-8. 887 * This should be used internally by the parser 888 * only to compare to ASCII values otherwise it would break when 889 * running with UTF-8 encoding. 890 * NXT(n) returns the n'th next xmlChar. Same as CUR is should be used only 891 * to compare on ASCII based substring. 892 * SKIP(n) Skip n xmlChar, and must also be used only to skip ASCII defined 893 * strings within the parser. 894 * CURRENT Returns the current char value, with the full decoding of 895 * UTF-8 if we are using this mode. It returns an int. 896 * NEXT Skip to the next character, this does the proper decoding 897 * in UTF-8 mode. It also pop-up unfinished entities on the fly. 898 * It returns the pointer to the current xmlChar. 899 */ 900 901#define CUR (*ctxt->cur) 902#define SKIP(val) ctxt->cur += (val) 903#define NXT(val) ctxt->cur[(val)] 904#define CUR_PTR ctxt->cur 905 906#define SKIP_BLANKS \ 907 while (IS_BLANK_CH(*(ctxt->cur))) NEXT 908 909#define CURRENT (*ctxt->cur) 910#define NEXT ((*ctxt->cur) ? ctxt->cur++: ctxt->cur) 911 912/* 913 * xmlXPtrGetChildNo: 914 * @ctxt: the XPointer Parser context 915 * @index: the child number 916 * 917 * Move the current node of the nodeset on the stack to the 918 * given child if found 919 */ 920static void 921xmlXPtrGetChildNo(xmlXPathParserContextPtr ctxt, int indx) { 922 xmlNodePtr cur = NULL; 923 xmlXPathObjectPtr obj; 924 xmlNodeSetPtr oldset; 925 926 CHECK_TYPE(XPATH_NODESET); 927 obj = valuePop(ctxt); 928 oldset = obj->nodesetval; 929 if ((indx <= 0) || (oldset == NULL) || (oldset->nodeNr != 1)) { 930 xmlXPathFreeObject(obj); 931 valuePush(ctxt, xmlXPathNewNodeSet(NULL)); 932 return; 933 } 934 cur = xmlXPtrGetNthChild(oldset->nodeTab[0], indx); 935 if (cur == NULL) { 936 xmlXPathFreeObject(obj); 937 valuePush(ctxt, xmlXPathNewNodeSet(NULL)); 938 return; 939 } 940 oldset->nodeTab[0] = cur; 941 valuePush(ctxt, obj); 942} 943 944/** 945 * xmlXPtrEvalXPtrPart: 946 * @ctxt: the XPointer Parser context 947 * @name: the preparsed Scheme for the XPtrPart 948 * 949 * XPtrPart ::= 'xpointer' '(' XPtrExpr ')' 950 * | Scheme '(' SchemeSpecificExpr ')' 951 * 952 * Scheme ::= NCName - 'xpointer' [VC: Non-XPointer schemes] 953 * 954 * SchemeSpecificExpr ::= StringWithBalancedParens 955 * 956 * StringWithBalancedParens ::= 957 * [^()]* ('(' StringWithBalancedParens ')' [^()]*)* 958 * [VC: Parenthesis escaping] 959 * 960 * XPtrExpr ::= Expr [VC: Parenthesis escaping] 961 * 962 * VC: Parenthesis escaping: 963 * The end of an XPointer part is signaled by the right parenthesis ")" 964 * character that is balanced with the left parenthesis "(" character 965 * that began the part. Any unbalanced parenthesis character inside the 966 * expression, even within literals, must be escaped with a circumflex (^) 967 * character preceding it. If the expression contains any literal 968 * occurrences of the circumflex, each must be escaped with an additional 969 * circumflex (that is, ^^). If the unescaped parentheses in the expression 970 * are not balanced, a syntax error results. 971 * 972 * Parse and evaluate an XPtrPart. Basically it generates the unescaped 973 * string and if the scheme is 'xpointer' it will call the XPath interpreter. 974 * 975 * TODO: there is no new scheme registration mechanism 976 */ 977 978static void 979xmlXPtrEvalXPtrPart(xmlXPathParserContextPtr ctxt, xmlChar *name) { 980 xmlChar *buffer, *cur; 981 int len; 982 int level; 983 984 if (name == NULL) 985 name = xmlXPathParseName(ctxt); 986 if (name == NULL) 987 XP_ERROR(XPATH_EXPR_ERROR); 988 989 if (CUR != '(') 990 XP_ERROR(XPATH_EXPR_ERROR); 991 NEXT; 992 level = 1; 993 994 len = xmlStrlen(ctxt->cur); 995 len++; 996 buffer = (xmlChar *) xmlMallocAtomic(len * sizeof (xmlChar)); 997 if (buffer == NULL) { 998 xmlXPtrErrMemory("allocating buffer"); 999 return; 1000 } 1001 1002 cur = buffer; 1003 while (CUR != 0) { 1004 if (CUR == ')') { 1005 level--; 1006 if (level == 0) { 1007 NEXT; 1008 break; 1009 } 1010 } else if (CUR == '(') { 1011 level++; 1012 } else if (CUR == '^') { 1013 if ((NXT(1) == ')') || (NXT(1) == '(') || (NXT(1) == '^')) { 1014 NEXT; 1015 } 1016 } 1017 *cur++ = CUR; 1018 NEXT; 1019 } 1020 *cur = 0; 1021 1022 if ((level != 0) && (CUR == 0)) { 1023 xmlFree(buffer); 1024 XP_ERROR(XPTR_SYNTAX_ERROR); 1025 } 1026 1027 if (xmlStrEqual(name, (xmlChar *) "xpointer")) { 1028 const xmlChar *left = CUR_PTR; 1029 1030 CUR_PTR = buffer; 1031 /* 1032 * To evaluate an xpointer scheme element (4.3) we need: 1033 * context initialized to the root 1034 * context position initalized to 1 1035 * context size initialized to 1 1036 */ 1037 ctxt->context->node = (xmlNodePtr)ctxt->context->doc; 1038 ctxt->context->proximityPosition = 1; 1039 ctxt->context->contextSize = 1; 1040 xmlXPathEvalExpr(ctxt); 1041 CUR_PTR=left; 1042 } else if (xmlStrEqual(name, (xmlChar *) "element")) { 1043 const xmlChar *left = CUR_PTR; 1044 xmlChar *name2; 1045 1046 CUR_PTR = buffer; 1047 if (buffer[0] == '/') { 1048 xmlXPathRoot(ctxt); 1049 xmlXPtrEvalChildSeq(ctxt, NULL); 1050 } else { 1051 name2 = xmlXPathParseName(ctxt); 1052 if (name2 == NULL) { 1053 CUR_PTR = left; 1054 xmlFree(buffer); 1055 XP_ERROR(XPATH_EXPR_ERROR); 1056 } 1057 xmlXPtrEvalChildSeq(ctxt, name2); 1058 } 1059 CUR_PTR = left; 1060#ifdef XPTR_XMLNS_SCHEME 1061 } else if (xmlStrEqual(name, (xmlChar *) "xmlns")) { 1062 const xmlChar *left = CUR_PTR; 1063 xmlChar *prefix; 1064 xmlChar *URI; 1065 xmlURIPtr value; 1066 1067 CUR_PTR = buffer; 1068 prefix = xmlXPathParseNCName(ctxt); 1069 if (prefix == NULL) { 1070 xmlFree(buffer); 1071 xmlFree(name); 1072 XP_ERROR(XPTR_SYNTAX_ERROR); 1073 } 1074 SKIP_BLANKS; 1075 if (CUR != '=') { 1076 xmlFree(prefix); 1077 xmlFree(buffer); 1078 xmlFree(name); 1079 XP_ERROR(XPTR_SYNTAX_ERROR); 1080 } 1081 NEXT; 1082 SKIP_BLANKS; 1083 /* @@ check escaping in the XPointer WD */ 1084 1085 value = xmlParseURI((const char *)ctxt->cur); 1086 if (value == NULL) { 1087 xmlFree(prefix); 1088 xmlFree(buffer); 1089 xmlFree(name); 1090 XP_ERROR(XPTR_SYNTAX_ERROR); 1091 } 1092 URI = xmlSaveUri(value); 1093 xmlFreeURI(value); 1094 if (URI == NULL) { 1095 xmlFree(prefix); 1096 xmlFree(buffer); 1097 xmlFree(name); 1098 XP_ERROR(XPATH_MEMORY_ERROR); 1099 } 1100 1101 xmlXPathRegisterNs(ctxt->context, prefix, URI); 1102 CUR_PTR = left; 1103 xmlFree(URI); 1104 xmlFree(prefix); 1105#endif /* XPTR_XMLNS_SCHEME */ 1106 } else { 1107 xmlXPtrErr(ctxt, XML_XPTR_UNKNOWN_SCHEME, 1108 "unsupported scheme '%s'\n", name); 1109 } 1110 xmlFree(buffer); 1111 xmlFree(name); 1112} 1113 1114/** 1115 * xmlXPtrEvalFullXPtr: 1116 * @ctxt: the XPointer Parser context 1117 * @name: the preparsed Scheme for the first XPtrPart 1118 * 1119 * FullXPtr ::= XPtrPart (S? XPtrPart)* 1120 * 1121 * As the specs says: 1122 * ----------- 1123 * When multiple XPtrParts are provided, they must be evaluated in 1124 * left-to-right order. If evaluation of one part fails, the nexti 1125 * is evaluated. The following conditions cause XPointer part failure: 1126 * 1127 * - An unknown scheme 1128 * - A scheme that does not locate any sub-resource present in the resource 1129 * - A scheme that is not applicable to the media type of the resource 1130 * 1131 * The XPointer application must consume a failed XPointer part and 1132 * attempt to evaluate the next one, if any. The result of the first 1133 * XPointer part whose evaluation succeeds is taken to be the fragment 1134 * located by the XPointer as a whole. If all the parts fail, the result 1135 * for the XPointer as a whole is a sub-resource error. 1136 * ----------- 1137 * 1138 * Parse and evaluate a Full XPtr i.e. possibly a cascade of XPath based 1139 * expressions or other schemes. 1140 */ 1141static void 1142xmlXPtrEvalFullXPtr(xmlXPathParserContextPtr ctxt, xmlChar *name) { 1143 if (name == NULL) 1144 name = xmlXPathParseName(ctxt); 1145 if (name == NULL) 1146 XP_ERROR(XPATH_EXPR_ERROR); 1147 while (name != NULL) { 1148 ctxt->error = XPATH_EXPRESSION_OK; 1149 xmlXPtrEvalXPtrPart(ctxt, name); 1150 1151 /* in case of syntax error, break here */ 1152 if ((ctxt->error != XPATH_EXPRESSION_OK) && 1153 (ctxt->error != XML_XPTR_UNKNOWN_SCHEME)) 1154 return; 1155 1156 /* 1157 * If the returned value is a non-empty nodeset 1158 * or location set, return here. 1159 */ 1160 if (ctxt->value != NULL) { 1161 xmlXPathObjectPtr obj = ctxt->value; 1162 1163 switch (obj->type) { 1164 case XPATH_LOCATIONSET: { 1165 xmlLocationSetPtr loc = ctxt->value->user; 1166 if ((loc != NULL) && (loc->locNr > 0)) 1167 return; 1168 break; 1169 } 1170 case XPATH_NODESET: { 1171 xmlNodeSetPtr loc = ctxt->value->nodesetval; 1172 if ((loc != NULL) && (loc->nodeNr > 0)) 1173 return; 1174 break; 1175 } 1176 default: 1177 break; 1178 } 1179 1180 /* 1181 * Evaluating to improper values is equivalent to 1182 * a sub-resource error, clean-up the stack 1183 */ 1184 do { 1185 obj = valuePop(ctxt); 1186 if (obj != NULL) { 1187 xmlXPathFreeObject(obj); 1188 } 1189 } while (obj != NULL); 1190 } 1191 1192 /* 1193 * Is there another XPointer part. 1194 */ 1195 SKIP_BLANKS; 1196 name = xmlXPathParseName(ctxt); 1197 } 1198} 1199 1200/** 1201 * xmlXPtrEvalChildSeq: 1202 * @ctxt: the XPointer Parser context 1203 * @name: a possible ID name of the child sequence 1204 * 1205 * ChildSeq ::= '/1' ('/' [0-9]*)* 1206 * | Name ('/' [0-9]*)+ 1207 * 1208 * Parse and evaluate a Child Sequence. This routine also handle the 1209 * case of a Bare Name used to get a document ID. 1210 */ 1211static void 1212xmlXPtrEvalChildSeq(xmlXPathParserContextPtr ctxt, xmlChar *name) { 1213 /* 1214 * XPointer don't allow by syntax to address in mutirooted trees 1215 * this might prove useful in some cases, warn about it. 1216 */ 1217 if ((name == NULL) && (CUR == '/') && (NXT(1) != '1')) { 1218 xmlXPtrErr(ctxt, XML_XPTR_CHILDSEQ_START, 1219 "warning: ChildSeq not starting by /1\n", NULL); 1220 } 1221 1222 if (name != NULL) { 1223 valuePush(ctxt, xmlXPathNewString(name)); 1224 xmlFree(name); 1225 xmlXPathIdFunction(ctxt, 1); 1226 CHECK_ERROR; 1227 } 1228 1229 while (CUR == '/') { 1230 int child = 0; 1231 NEXT; 1232 1233 while ((CUR >= '0') && (CUR <= '9')) { 1234 child = child * 10 + (CUR - '0'); 1235 NEXT; 1236 } 1237 xmlXPtrGetChildNo(ctxt, child); 1238 } 1239} 1240 1241 1242/** 1243 * xmlXPtrEvalXPointer: 1244 * @ctxt: the XPointer Parser context 1245 * 1246 * XPointer ::= Name 1247 * | ChildSeq 1248 * | FullXPtr 1249 * 1250 * Parse and evaluate an XPointer 1251 */ 1252static void 1253xmlXPtrEvalXPointer(xmlXPathParserContextPtr ctxt) { 1254 if (ctxt->valueTab == NULL) { 1255 /* Allocate the value stack */ 1256 ctxt->valueTab = (xmlXPathObjectPtr *) 1257 xmlMalloc(10 * sizeof(xmlXPathObjectPtr)); 1258 if (ctxt->valueTab == NULL) { 1259 xmlXPtrErrMemory("allocating evaluation context"); 1260 return; 1261 } 1262 ctxt->valueNr = 0; 1263 ctxt->valueMax = 10; 1264 ctxt->value = NULL; 1265 ctxt->valueFrame = 0; 1266 } 1267 SKIP_BLANKS; 1268 if (CUR == '/') { 1269 xmlXPathRoot(ctxt); 1270 xmlXPtrEvalChildSeq(ctxt, NULL); 1271 } else { 1272 xmlChar *name; 1273 1274 name = xmlXPathParseName(ctxt); 1275 if (name == NULL) 1276 XP_ERROR(XPATH_EXPR_ERROR); 1277 if (CUR == '(') { 1278 xmlXPtrEvalFullXPtr(ctxt, name); 1279 /* Short evaluation */ 1280 return; 1281 } else { 1282 /* this handle both Bare Names and Child Sequences */ 1283 xmlXPtrEvalChildSeq(ctxt, name); 1284 } 1285 } 1286 SKIP_BLANKS; 1287 if (CUR != 0) 1288 XP_ERROR(XPATH_EXPR_ERROR); 1289} 1290 1291 1292/************************************************************************ 1293 * * 1294 * General routines * 1295 * * 1296 ************************************************************************/ 1297 1298static 1299void xmlXPtrStringRangeFunction(xmlXPathParserContextPtr ctxt, int nargs); 1300static 1301void xmlXPtrStartPointFunction(xmlXPathParserContextPtr ctxt, int nargs); 1302static 1303void xmlXPtrEndPointFunction(xmlXPathParserContextPtr ctxt, int nargs); 1304static 1305void xmlXPtrHereFunction(xmlXPathParserContextPtr ctxt, int nargs); 1306static 1307void xmlXPtrOriginFunction(xmlXPathParserContextPtr ctxt, int nargs); 1308static 1309void xmlXPtrRangeInsideFunction(xmlXPathParserContextPtr ctxt, int nargs); 1310static 1311void xmlXPtrRangeFunction(xmlXPathParserContextPtr ctxt, int nargs); 1312 1313/** 1314 * xmlXPtrNewContext: 1315 * @doc: the XML document 1316 * @here: the node that directly contains the XPointer being evaluated or NULL 1317 * @origin: the element from which a user or program initiated traversal of 1318 * the link, or NULL. 1319 * 1320 * Create a new XPointer context 1321 * 1322 * Returns the xmlXPathContext just allocated. 1323 */ 1324xmlXPathContextPtr 1325xmlXPtrNewContext(xmlDocPtr doc, xmlNodePtr here, xmlNodePtr origin) { 1326 xmlXPathContextPtr ret; 1327 1328 ret = xmlXPathNewContext(doc); 1329 if (ret == NULL) 1330 return(ret); 1331 ret->xptr = 1; 1332 ret->here = here; 1333 ret->origin = origin; 1334 1335 xmlXPathRegisterFunc(ret, (xmlChar *)"range-to", 1336 xmlXPtrRangeToFunction); 1337 xmlXPathRegisterFunc(ret, (xmlChar *)"range", 1338 xmlXPtrRangeFunction); 1339 xmlXPathRegisterFunc(ret, (xmlChar *)"range-inside", 1340 xmlXPtrRangeInsideFunction); 1341 xmlXPathRegisterFunc(ret, (xmlChar *)"string-range", 1342 xmlXPtrStringRangeFunction); 1343 xmlXPathRegisterFunc(ret, (xmlChar *)"start-point", 1344 xmlXPtrStartPointFunction); 1345 xmlXPathRegisterFunc(ret, (xmlChar *)"end-point", 1346 xmlXPtrEndPointFunction); 1347 xmlXPathRegisterFunc(ret, (xmlChar *)"here", 1348 xmlXPtrHereFunction); 1349 xmlXPathRegisterFunc(ret, (xmlChar *)" origin", 1350 xmlXPtrOriginFunction); 1351 1352 return(ret); 1353} 1354 1355/** 1356 * xmlXPtrEval: 1357 * @str: the XPointer expression 1358 * @ctx: the XPointer context 1359 * 1360 * Evaluate the XPath Location Path in the given context. 1361 * 1362 * Returns the xmlXPathObjectPtr resulting from the evaluation or NULL. 1363 * the caller has to free the object. 1364 */ 1365xmlXPathObjectPtr 1366xmlXPtrEval(const xmlChar *str, xmlXPathContextPtr ctx) { 1367 xmlXPathParserContextPtr ctxt; 1368 xmlXPathObjectPtr res = NULL, tmp; 1369 xmlXPathObjectPtr init = NULL; 1370 int stack = 0; 1371 1372 xmlXPathInit(); 1373 1374 if ((ctx == NULL) || (str == NULL)) 1375 return(NULL); 1376 1377 ctxt = xmlXPathNewParserContext(str, ctx); 1378 ctxt->xptr = 1; 1379 xmlXPtrEvalXPointer(ctxt); 1380 1381 if ((ctxt->value != NULL) && 1382 (ctxt->value->type != XPATH_NODESET) && 1383 (ctxt->value->type != XPATH_LOCATIONSET)) { 1384 xmlXPtrErr(ctxt, XML_XPTR_EVAL_FAILED, 1385 "xmlXPtrEval: evaluation failed to return a node set\n", 1386 NULL); 1387 } else { 1388 res = valuePop(ctxt); 1389 } 1390 1391 do { 1392 tmp = valuePop(ctxt); 1393 if (tmp != NULL) { 1394 if (tmp != init) { 1395 if (tmp->type == XPATH_NODESET) { 1396 /* 1397 * Evaluation may push a root nodeset which is unused 1398 */ 1399 xmlNodeSetPtr set; 1400 set = tmp->nodesetval; 1401 if ((set->nodeNr != 1) || 1402 (set->nodeTab[0] != (xmlNodePtr) ctx->doc)) 1403 stack++; 1404 } else 1405 stack++; 1406 } 1407 xmlXPathFreeObject(tmp); 1408 } 1409 } while (tmp != NULL); 1410 if (stack != 0) { 1411 xmlXPtrErr(ctxt, XML_XPTR_EXTRA_OBJECTS, 1412 "xmlXPtrEval: object(s) left on the eval stack\n", 1413 NULL); 1414 } 1415 if (ctxt->error != XPATH_EXPRESSION_OK) { 1416 xmlXPathFreeObject(res); 1417 res = NULL; 1418 } 1419 1420 xmlXPathFreeParserContext(ctxt); 1421 return(res); 1422} 1423 1424/** 1425 * xmlXPtrBuildRangeNodeList: 1426 * @range: a range object 1427 * 1428 * Build a node list tree copy of the range 1429 * 1430 * Returns an xmlNodePtr list or NULL. 1431 * the caller has to free the node tree. 1432 */ 1433static xmlNodePtr 1434xmlXPtrBuildRangeNodeList(xmlXPathObjectPtr range) { 1435 /* pointers to generated nodes */ 1436 xmlNodePtr list = NULL, last = NULL, parent = NULL, tmp; 1437 /* pointers to traversal nodes */ 1438 xmlNodePtr start, cur, end; 1439 int index1, index2; 1440 1441 if (range == NULL) 1442 return(NULL); 1443 if (range->type != XPATH_RANGE) 1444 return(NULL); 1445 start = (xmlNodePtr) range->user; 1446 1447 if ((start == NULL) || (start->type == XML_NAMESPACE_DECL)) 1448 return(NULL); 1449 end = range->user2; 1450 if (end == NULL) 1451 return(xmlCopyNode(start, 1)); 1452 if (end->type == XML_NAMESPACE_DECL) 1453 return(NULL); 1454 1455 cur = start; 1456 index1 = range->index; 1457 index2 = range->index2; 1458 while (cur != NULL) { 1459 if (cur == end) { 1460 if (cur->type == XML_TEXT_NODE) { 1461 const xmlChar *content = cur->content; 1462 int len; 1463 1464 if (content == NULL) { 1465 tmp = xmlNewTextLen(NULL, 0); 1466 } else { 1467 len = index2; 1468 if ((cur == start) && (index1 > 1)) { 1469 content += (index1 - 1); 1470 len -= (index1 - 1); 1471 index1 = 0; 1472 } else { 1473 len = index2; 1474 } 1475 tmp = xmlNewTextLen(content, len); 1476 } 1477 /* single sub text node selection */ 1478 if (list == NULL) 1479 return(tmp); 1480 /* prune and return full set */ 1481 if (last != NULL) 1482 xmlAddNextSibling(last, tmp); 1483 else 1484 xmlAddChild(parent, tmp); 1485 return(list); 1486 } else { 1487 tmp = xmlCopyNode(cur, 0); 1488 if (list == NULL) 1489 list = tmp; 1490 else { 1491 if (last != NULL) 1492 xmlAddNextSibling(last, tmp); 1493 else 1494 xmlAddChild(parent, tmp); 1495 } 1496 last = NULL; 1497 parent = tmp; 1498 1499 if (index2 > 1) { 1500 end = xmlXPtrGetNthChild(cur, index2 - 1); 1501 index2 = 0; 1502 } 1503 if ((cur == start) && (index1 > 1)) { 1504 cur = xmlXPtrGetNthChild(cur, index1 - 1); 1505 index1 = 0; 1506 } else { 1507 cur = cur->children; 1508 } 1509 /* 1510 * Now gather the remaining nodes from cur to end 1511 */ 1512 continue; /* while */ 1513 } 1514 } else if ((cur == start) && 1515 (list == NULL) /* looks superfluous but ... */ ) { 1516 if ((cur->type == XML_TEXT_NODE) || 1517 (cur->type == XML_CDATA_SECTION_NODE)) { 1518 const xmlChar *content = cur->content; 1519 1520 if (content == NULL) { 1521 tmp = xmlNewTextLen(NULL, 0); 1522 } else { 1523 if (index1 > 1) { 1524 content += (index1 - 1); 1525 } 1526 tmp = xmlNewText(content); 1527 } 1528 last = list = tmp; 1529 } else { 1530 if ((cur == start) && (index1 > 1)) { 1531 tmp = xmlCopyNode(cur, 0); 1532 list = tmp; 1533 parent = tmp; 1534 last = NULL; 1535 cur = xmlXPtrGetNthChild(cur, index1 - 1); 1536 index1 = 0; 1537 /* 1538 * Now gather the remaining nodes from cur to end 1539 */ 1540 continue; /* while */ 1541 } 1542 tmp = xmlCopyNode(cur, 1); 1543 list = tmp; 1544 parent = NULL; 1545 last = tmp; 1546 } 1547 } else { 1548 tmp = NULL; 1549 switch (cur->type) { 1550 case XML_DTD_NODE: 1551 case XML_ELEMENT_DECL: 1552 case XML_ATTRIBUTE_DECL: 1553 case XML_ENTITY_NODE: 1554 /* Do not copy DTD informations */ 1555 break; 1556 case XML_ENTITY_DECL: 1557 TODO /* handle crossing entities -> stack needed */ 1558 break; 1559 case XML_XINCLUDE_START: 1560 case XML_XINCLUDE_END: 1561 /* don't consider it part of the tree content */ 1562 break; 1563 case XML_ATTRIBUTE_NODE: 1564 /* Humm, should not happen ! */ 1565 STRANGE 1566 break; 1567 default: 1568 tmp = xmlCopyNode(cur, 1); 1569 break; 1570 } 1571 if (tmp != NULL) { 1572 if ((list == NULL) || ((last == NULL) && (parent == NULL))) { 1573 STRANGE 1574 return(NULL); 1575 } 1576 if (last != NULL) 1577 xmlAddNextSibling(last, tmp); 1578 else { 1579 xmlAddChild(parent, tmp); 1580 last = tmp; 1581 } 1582 } 1583 } 1584 /* 1585 * Skip to next node in document order 1586 */ 1587 if ((list == NULL) || ((last == NULL) && (parent == NULL))) { 1588 STRANGE 1589 return(NULL); 1590 } 1591 cur = xmlXPtrAdvanceNode(cur, NULL); 1592 } 1593 return(list); 1594} 1595 1596/** 1597 * xmlXPtrBuildNodeList: 1598 * @obj: the XPointer result from the evaluation. 1599 * 1600 * Build a node list tree copy of the XPointer result. 1601 * This will drop Attributes and Namespace declarations. 1602 * 1603 * Returns an xmlNodePtr list or NULL. 1604 * the caller has to free the node tree. 1605 */ 1606xmlNodePtr 1607xmlXPtrBuildNodeList(xmlXPathObjectPtr obj) { 1608 xmlNodePtr list = NULL, last = NULL; 1609 int i; 1610 1611 if (obj == NULL) 1612 return(NULL); 1613 switch (obj->type) { 1614 case XPATH_NODESET: { 1615 xmlNodeSetPtr set = obj->nodesetval; 1616 if (set == NULL) 1617 return(NULL); 1618 for (i = 0;i < set->nodeNr;i++) { 1619 if (set->nodeTab[i] == NULL) 1620 continue; 1621 switch (set->nodeTab[i]->type) { 1622 case XML_TEXT_NODE: 1623 case XML_CDATA_SECTION_NODE: 1624 case XML_ELEMENT_NODE: 1625 case XML_ENTITY_REF_NODE: 1626 case XML_ENTITY_NODE: 1627 case XML_PI_NODE: 1628 case XML_COMMENT_NODE: 1629 case XML_DOCUMENT_NODE: 1630 case XML_HTML_DOCUMENT_NODE: 1631#ifdef LIBXML_DOCB_ENABLED 1632 case XML_DOCB_DOCUMENT_NODE: 1633#endif 1634 case XML_XINCLUDE_START: 1635 case XML_XINCLUDE_END: 1636 break; 1637 case XML_ATTRIBUTE_NODE: 1638 case XML_NAMESPACE_DECL: 1639 case XML_DOCUMENT_TYPE_NODE: 1640 case XML_DOCUMENT_FRAG_NODE: 1641 case XML_NOTATION_NODE: 1642 case XML_DTD_NODE: 1643 case XML_ELEMENT_DECL: 1644 case XML_ATTRIBUTE_DECL: 1645 case XML_ENTITY_DECL: 1646 continue; /* for */ 1647 } 1648 if (last == NULL) 1649 list = last = xmlCopyNode(set->nodeTab[i], 1); 1650 else { 1651 xmlAddNextSibling(last, xmlCopyNode(set->nodeTab[i], 1)); 1652 if (last->next != NULL) 1653 last = last->next; 1654 } 1655 } 1656 break; 1657 } 1658 case XPATH_LOCATIONSET: { 1659 xmlLocationSetPtr set = (xmlLocationSetPtr) obj->user; 1660 if (set == NULL) 1661 return(NULL); 1662 for (i = 0;i < set->locNr;i++) { 1663 if (last == NULL) 1664 list = last = xmlXPtrBuildNodeList(set->locTab[i]); 1665 else 1666 xmlAddNextSibling(last, 1667 xmlXPtrBuildNodeList(set->locTab[i])); 1668 if (last != NULL) { 1669 while (last->next != NULL) 1670 last = last->next; 1671 } 1672 } 1673 break; 1674 } 1675 case XPATH_RANGE: 1676 return(xmlXPtrBuildRangeNodeList(obj)); 1677 case XPATH_POINT: 1678 return(xmlCopyNode(obj->user, 0)); 1679 default: 1680 break; 1681 } 1682 return(list); 1683} 1684 1685/************************************************************************ 1686 * * 1687 * XPointer functions * 1688 * * 1689 ************************************************************************/ 1690 1691/** 1692 * xmlXPtrNbLocChildren: 1693 * @node: an xmlNodePtr 1694 * 1695 * Count the number of location children of @node or the length of the 1696 * string value in case of text/PI/Comments nodes 1697 * 1698 * Returns the number of location children 1699 */ 1700static int 1701xmlXPtrNbLocChildren(xmlNodePtr node) { 1702 int ret = 0; 1703 if (node == NULL) 1704 return(-1); 1705 switch (node->type) { 1706 case XML_HTML_DOCUMENT_NODE: 1707 case XML_DOCUMENT_NODE: 1708 case XML_ELEMENT_NODE: 1709 node = node->children; 1710 while (node != NULL) { 1711 if (node->type == XML_ELEMENT_NODE) 1712 ret++; 1713 node = node->next; 1714 } 1715 break; 1716 case XML_ATTRIBUTE_NODE: 1717 return(-1); 1718 1719 case XML_PI_NODE: 1720 case XML_COMMENT_NODE: 1721 case XML_TEXT_NODE: 1722 case XML_CDATA_SECTION_NODE: 1723 case XML_ENTITY_REF_NODE: 1724 ret = xmlStrlen(node->content); 1725 break; 1726 default: 1727 return(-1); 1728 } 1729 return(ret); 1730} 1731 1732/** 1733 * xmlXPtrHereFunction: 1734 * @ctxt: the XPointer Parser context 1735 * @nargs: the number of args 1736 * 1737 * Function implementing here() operation 1738 * as described in 5.4.3 1739 */ 1740static void 1741xmlXPtrHereFunction(xmlXPathParserContextPtr ctxt, int nargs) { 1742 CHECK_ARITY(0); 1743 1744 if (ctxt->context->here == NULL) 1745 XP_ERROR(XPTR_SYNTAX_ERROR); 1746 1747 valuePush(ctxt, xmlXPtrNewLocationSetNodes(ctxt->context->here, NULL)); 1748} 1749 1750/** 1751 * xmlXPtrOriginFunction: 1752 * @ctxt: the XPointer Parser context 1753 * @nargs: the number of args 1754 * 1755 * Function implementing origin() operation 1756 * as described in 5.4.3 1757 */ 1758static void 1759xmlXPtrOriginFunction(xmlXPathParserContextPtr ctxt, int nargs) { 1760 CHECK_ARITY(0); 1761 1762 if (ctxt->context->origin == NULL) 1763 XP_ERROR(XPTR_SYNTAX_ERROR); 1764 1765 valuePush(ctxt, xmlXPtrNewLocationSetNodes(ctxt->context->origin, NULL)); 1766} 1767 1768/** 1769 * xmlXPtrStartPointFunction: 1770 * @ctxt: the XPointer Parser context 1771 * @nargs: the number of args 1772 * 1773 * Function implementing start-point() operation 1774 * as described in 5.4.3 1775 * ---------------- 1776 * location-set start-point(location-set) 1777 * 1778 * For each location x in the argument location-set, start-point adds a 1779 * location of type point to the result location-set. That point represents 1780 * the start point of location x and is determined by the following rules: 1781 * 1782 * - If x is of type point, the start point is x. 1783 * - If x is of type range, the start point is the start point of x. 1784 * - If x is of type root, element, text, comment, or processing instruction, 1785 * - the container node of the start point is x and the index is 0. 1786 * - If x is of type attribute or namespace, the function must signal a 1787 * syntax error. 1788 * ---------------- 1789 * 1790 */ 1791static void 1792xmlXPtrStartPointFunction(xmlXPathParserContextPtr ctxt, int nargs) { 1793 xmlXPathObjectPtr tmp, obj, point; 1794 xmlLocationSetPtr newset = NULL; 1795 xmlLocationSetPtr oldset = NULL; 1796 1797 CHECK_ARITY(1); 1798 if ((ctxt->value == NULL) || 1799 ((ctxt->value->type != XPATH_LOCATIONSET) && 1800 (ctxt->value->type != XPATH_NODESET))) 1801 XP_ERROR(XPATH_INVALID_TYPE) 1802 1803 obj = valuePop(ctxt); 1804 if (obj->type == XPATH_NODESET) { 1805 /* 1806 * First convert to a location set 1807 */ 1808 tmp = xmlXPtrNewLocationSetNodeSet(obj->nodesetval); 1809 xmlXPathFreeObject(obj); 1810 obj = tmp; 1811 } 1812 1813 newset = xmlXPtrLocationSetCreate(NULL); 1814 if (newset == NULL) { 1815 xmlXPathFreeObject(obj); 1816 XP_ERROR(XPATH_MEMORY_ERROR); 1817 } 1818 oldset = (xmlLocationSetPtr) obj->user; 1819 if (oldset != NULL) { 1820 int i; 1821 1822 for (i = 0; i < oldset->locNr; i++) { 1823 tmp = oldset->locTab[i]; 1824 if (tmp == NULL) 1825 continue; 1826 point = NULL; 1827 switch (tmp->type) { 1828 case XPATH_POINT: 1829 point = xmlXPtrNewPoint(tmp->user, tmp->index); 1830 break; 1831 case XPATH_RANGE: { 1832 xmlNodePtr node = tmp->user; 1833 if (node != NULL) { 1834 if (node->type == XML_ATTRIBUTE_NODE) { 1835 /* TODO: Namespace Nodes ??? */ 1836 xmlXPathFreeObject(obj); 1837 xmlXPtrFreeLocationSet(newset); 1838 XP_ERROR(XPTR_SYNTAX_ERROR); 1839 } 1840 point = xmlXPtrNewPoint(node, tmp->index); 1841 } 1842 break; 1843 } 1844 default: 1845 /*** Should we raise an error ? 1846 xmlXPathFreeObject(obj); 1847 xmlXPathFreeObject(newset); 1848 XP_ERROR(XPATH_INVALID_TYPE) 1849 ***/ 1850 break; 1851 } 1852 if (point != NULL) 1853 xmlXPtrLocationSetAdd(newset, point); 1854 } 1855 } 1856 xmlXPathFreeObject(obj); 1857 valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); 1858} 1859 1860/** 1861 * xmlXPtrEndPointFunction: 1862 * @ctxt: the XPointer Parser context 1863 * @nargs: the number of args 1864 * 1865 * Function implementing end-point() operation 1866 * as described in 5.4.3 1867 * ---------------------------- 1868 * location-set end-point(location-set) 1869 * 1870 * For each location x in the argument location-set, end-point adds a 1871 * location of type point to the result location-set. That point represents 1872 * the end point of location x and is determined by the following rules: 1873 * 1874 * - If x is of type point, the resulting point is x. 1875 * - If x is of type range, the resulting point is the end point of x. 1876 * - If x is of type root or element, the container node of the resulting 1877 * point is x and the index is the number of location children of x. 1878 * - If x is of type text, comment, or processing instruction, the container 1879 * node of the resulting point is x and the index is the length of the 1880 * string-value of x. 1881 * - If x is of type attribute or namespace, the function must signal a 1882 * syntax error. 1883 * ---------------------------- 1884 */ 1885static void 1886xmlXPtrEndPointFunction(xmlXPathParserContextPtr ctxt, int nargs) { 1887 xmlXPathObjectPtr tmp, obj, point; 1888 xmlLocationSetPtr newset = NULL; 1889 xmlLocationSetPtr oldset = NULL; 1890 1891 CHECK_ARITY(1); 1892 if ((ctxt->value == NULL) || 1893 ((ctxt->value->type != XPATH_LOCATIONSET) && 1894 (ctxt->value->type != XPATH_NODESET))) 1895 XP_ERROR(XPATH_INVALID_TYPE) 1896 1897 obj = valuePop(ctxt); 1898 if (obj->type == XPATH_NODESET) { 1899 /* 1900 * First convert to a location set 1901 */ 1902 tmp = xmlXPtrNewLocationSetNodeSet(obj->nodesetval); 1903 xmlXPathFreeObject(obj); 1904 obj = tmp; 1905 } 1906 1907 newset = xmlXPtrLocationSetCreate(NULL); 1908 oldset = (xmlLocationSetPtr) obj->user; 1909 if (oldset != NULL) { 1910 int i; 1911 1912 for (i = 0; i < oldset->locNr; i++) { 1913 tmp = oldset->locTab[i]; 1914 if (tmp == NULL) 1915 continue; 1916 point = NULL; 1917 switch (tmp->type) { 1918 case XPATH_POINT: 1919 point = xmlXPtrNewPoint(tmp->user, tmp->index); 1920 break; 1921 case XPATH_RANGE: { 1922 xmlNodePtr node = tmp->user2; 1923 if (node != NULL) { 1924 if (node->type == XML_ATTRIBUTE_NODE) { 1925 /* TODO: Namespace Nodes ??? */ 1926 xmlXPathFreeObject(obj); 1927 xmlXPtrFreeLocationSet(newset); 1928 XP_ERROR(XPTR_SYNTAX_ERROR); 1929 } 1930 point = xmlXPtrNewPoint(node, tmp->index2); 1931 } else if (tmp->user == NULL) { 1932 point = xmlXPtrNewPoint(node, 1933 xmlXPtrNbLocChildren(node)); 1934 } 1935 break; 1936 } 1937 default: 1938 /*** Should we raise an error ? 1939 xmlXPathFreeObject(obj); 1940 xmlXPathFreeObject(newset); 1941 XP_ERROR(XPATH_INVALID_TYPE) 1942 ***/ 1943 break; 1944 } 1945 if (point != NULL) 1946 xmlXPtrLocationSetAdd(newset, point); 1947 } 1948 } 1949 xmlXPathFreeObject(obj); 1950 valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); 1951} 1952 1953 1954/** 1955 * xmlXPtrCoveringRange: 1956 * @ctxt: the XPointer Parser context 1957 * @loc: the location for which the covering range must be computed 1958 * 1959 * A covering range is a range that wholly encompasses a location 1960 * Section 5.3.3. Covering Ranges for All Location Types 1961 * http://www.w3.org/TR/xptr#N2267 1962 * 1963 * Returns a new location or NULL in case of error 1964 */ 1965static xmlXPathObjectPtr 1966xmlXPtrCoveringRange(xmlXPathParserContextPtr ctxt, xmlXPathObjectPtr loc) { 1967 if (loc == NULL) 1968 return(NULL); 1969 if ((ctxt == NULL) || (ctxt->context == NULL) || 1970 (ctxt->context->doc == NULL)) 1971 return(NULL); 1972 switch (loc->type) { 1973 case XPATH_POINT: 1974 return(xmlXPtrNewRange(loc->user, loc->index, 1975 loc->user, loc->index)); 1976 case XPATH_RANGE: 1977 if (loc->user2 != NULL) { 1978 return(xmlXPtrNewRange(loc->user, loc->index, 1979 loc->user2, loc->index2)); 1980 } else { 1981 xmlNodePtr node = (xmlNodePtr) loc->user; 1982 if (node == (xmlNodePtr) ctxt->context->doc) { 1983 return(xmlXPtrNewRange(node, 0, node, 1984 xmlXPtrGetArity(node))); 1985 } else { 1986 switch (node->type) { 1987 case XML_ATTRIBUTE_NODE: 1988 /* !!! our model is slightly different than XPath */ 1989 return(xmlXPtrNewRange(node, 0, node, 1990 xmlXPtrGetArity(node))); 1991 case XML_ELEMENT_NODE: 1992 case XML_TEXT_NODE: 1993 case XML_CDATA_SECTION_NODE: 1994 case XML_ENTITY_REF_NODE: 1995 case XML_PI_NODE: 1996 case XML_COMMENT_NODE: 1997 case XML_DOCUMENT_NODE: 1998 case XML_NOTATION_NODE: 1999 case XML_HTML_DOCUMENT_NODE: { 2000 int indx = xmlXPtrGetIndex(node); 2001 2002 node = node->parent; 2003 return(xmlXPtrNewRange(node, indx - 1, 2004 node, indx + 1)); 2005 } 2006 default: 2007 return(NULL); 2008 } 2009 } 2010 } 2011 default: 2012 TODO /* missed one case ??? */ 2013 } 2014 return(NULL); 2015} 2016 2017/** 2018 * xmlXPtrRangeFunction: 2019 * @ctxt: the XPointer Parser context 2020 * @nargs: the number of args 2021 * 2022 * Function implementing the range() function 5.4.3 2023 * location-set range(location-set ) 2024 * 2025 * The range function returns ranges covering the locations in 2026 * the argument location-set. For each location x in the argument 2027 * location-set, a range location representing the covering range of 2028 * x is added to the result location-set. 2029 */ 2030static void 2031xmlXPtrRangeFunction(xmlXPathParserContextPtr ctxt, int nargs) { 2032 int i; 2033 xmlXPathObjectPtr set; 2034 xmlLocationSetPtr oldset; 2035 xmlLocationSetPtr newset; 2036 2037 CHECK_ARITY(1); 2038 if ((ctxt->value == NULL) || 2039 ((ctxt->value->type != XPATH_LOCATIONSET) && 2040 (ctxt->value->type != XPATH_NODESET))) 2041 XP_ERROR(XPATH_INVALID_TYPE) 2042 2043 set = valuePop(ctxt); 2044 if (set->type == XPATH_NODESET) { 2045 xmlXPathObjectPtr tmp; 2046 2047 /* 2048 * First convert to a location set 2049 */ 2050 tmp = xmlXPtrNewLocationSetNodeSet(set->nodesetval); 2051 xmlXPathFreeObject(set); 2052 set = tmp; 2053 } 2054 oldset = (xmlLocationSetPtr) set->user; 2055 2056 /* 2057 * The loop is to compute the covering range for each item and add it 2058 */ 2059 newset = xmlXPtrLocationSetCreate(NULL); 2060 for (i = 0;i < oldset->locNr;i++) { 2061 xmlXPtrLocationSetAdd(newset, 2062 xmlXPtrCoveringRange(ctxt, oldset->locTab[i])); 2063 } 2064 2065 /* 2066 * Save the new value and cleanup 2067 */ 2068 valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); 2069 xmlXPathFreeObject(set); 2070} 2071 2072/** 2073 * xmlXPtrInsideRange: 2074 * @ctxt: the XPointer Parser context 2075 * @loc: the location for which the inside range must be computed 2076 * 2077 * A inside range is a range described in the range-inside() description 2078 * 2079 * Returns a new location or NULL in case of error 2080 */ 2081static xmlXPathObjectPtr 2082xmlXPtrInsideRange(xmlXPathParserContextPtr ctxt, xmlXPathObjectPtr loc) { 2083 if (loc == NULL) 2084 return(NULL); 2085 if ((ctxt == NULL) || (ctxt->context == NULL) || 2086 (ctxt->context->doc == NULL)) 2087 return(NULL); 2088 switch (loc->type) { 2089 case XPATH_POINT: { 2090 xmlNodePtr node = (xmlNodePtr) loc->user; 2091 switch (node->type) { 2092 case XML_PI_NODE: 2093 case XML_COMMENT_NODE: 2094 case XML_TEXT_NODE: 2095 case XML_CDATA_SECTION_NODE: { 2096 if (node->content == NULL) { 2097 return(xmlXPtrNewRange(node, 0, node, 0)); 2098 } else { 2099 return(xmlXPtrNewRange(node, 0, node, 2100 xmlStrlen(node->content))); 2101 } 2102 } 2103 case XML_ATTRIBUTE_NODE: 2104 case XML_ELEMENT_NODE: 2105 case XML_ENTITY_REF_NODE: 2106 case XML_DOCUMENT_NODE: 2107 case XML_NOTATION_NODE: 2108 case XML_HTML_DOCUMENT_NODE: { 2109 return(xmlXPtrNewRange(node, 0, node, 2110 xmlXPtrGetArity(node))); 2111 } 2112 default: 2113 break; 2114 } 2115 return(NULL); 2116 } 2117 case XPATH_RANGE: { 2118 xmlNodePtr node = (xmlNodePtr) loc->user; 2119 if (loc->user2 != NULL) { 2120 return(xmlXPtrNewRange(node, loc->index, 2121 loc->user2, loc->index2)); 2122 } else { 2123 switch (node->type) { 2124 case XML_PI_NODE: 2125 case XML_COMMENT_NODE: 2126 case XML_TEXT_NODE: 2127 case XML_CDATA_SECTION_NODE: { 2128 if (node->content == NULL) { 2129 return(xmlXPtrNewRange(node, 0, node, 0)); 2130 } else { 2131 return(xmlXPtrNewRange(node, 0, node, 2132 xmlStrlen(node->content))); 2133 } 2134 } 2135 case XML_ATTRIBUTE_NODE: 2136 case XML_ELEMENT_NODE: 2137 case XML_ENTITY_REF_NODE: 2138 case XML_DOCUMENT_NODE: 2139 case XML_NOTATION_NODE: 2140 case XML_HTML_DOCUMENT_NODE: { 2141 return(xmlXPtrNewRange(node, 0, node, 2142 xmlXPtrGetArity(node))); 2143 } 2144 default: 2145 break; 2146 } 2147 return(NULL); 2148 } 2149 } 2150 default: 2151 TODO /* missed one case ??? */ 2152 } 2153 return(NULL); 2154} 2155 2156/** 2157 * xmlXPtrRangeInsideFunction: 2158 * @ctxt: the XPointer Parser context 2159 * @nargs: the number of args 2160 * 2161 * Function implementing the range-inside() function 5.4.3 2162 * location-set range-inside(location-set ) 2163 * 2164 * The range-inside function returns ranges covering the contents of 2165 * the locations in the argument location-set. For each location x in 2166 * the argument location-set, a range location is added to the result 2167 * location-set. If x is a range location, then x is added to the 2168 * result location-set. If x is not a range location, then x is used 2169 * as the container location of the start and end points of the range 2170 * location to be added; the index of the start point of the range is 2171 * zero; if the end point is a character point then its index is the 2172 * length of the string-value of x, and otherwise is the number of 2173 * location children of x. 2174 * 2175 */ 2176static void 2177xmlXPtrRangeInsideFunction(xmlXPathParserContextPtr ctxt, int nargs) { 2178 int i; 2179 xmlXPathObjectPtr set; 2180 xmlLocationSetPtr oldset; 2181 xmlLocationSetPtr newset; 2182 2183 CHECK_ARITY(1); 2184 if ((ctxt->value == NULL) || 2185 ((ctxt->value->type != XPATH_LOCATIONSET) && 2186 (ctxt->value->type != XPATH_NODESET))) 2187 XP_ERROR(XPATH_INVALID_TYPE) 2188 2189 set = valuePop(ctxt); 2190 if (set->type == XPATH_NODESET) { 2191 xmlXPathObjectPtr tmp; 2192 2193 /* 2194 * First convert to a location set 2195 */ 2196 tmp = xmlXPtrNewLocationSetNodeSet(set->nodesetval); 2197 xmlXPathFreeObject(set); 2198 set = tmp; 2199 } 2200 oldset = (xmlLocationSetPtr) set->user; 2201 2202 /* 2203 * The loop is to compute the covering range for each item and add it 2204 */ 2205 newset = xmlXPtrLocationSetCreate(NULL); 2206 for (i = 0;i < oldset->locNr;i++) { 2207 xmlXPtrLocationSetAdd(newset, 2208 xmlXPtrInsideRange(ctxt, oldset->locTab[i])); 2209 } 2210 2211 /* 2212 * Save the new value and cleanup 2213 */ 2214 valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); 2215 xmlXPathFreeObject(set); 2216} 2217 2218/** 2219 * xmlXPtrRangeToFunction: 2220 * @ctxt: the XPointer Parser context 2221 * @nargs: the number of args 2222 * 2223 * Implement the range-to() XPointer function 2224 */ 2225void 2226xmlXPtrRangeToFunction(xmlXPathParserContextPtr ctxt, int nargs) { 2227 xmlXPathObjectPtr range; 2228 const xmlChar *cur; 2229 xmlXPathObjectPtr res, obj; 2230 xmlXPathObjectPtr tmp; 2231 xmlLocationSetPtr newset = NULL; 2232 xmlNodeSetPtr oldset; 2233 int i; 2234 2235 if (ctxt == NULL) return; 2236 CHECK_ARITY(1); 2237 /* 2238 * Save the expression pointer since we will have to evaluate 2239 * it multiple times. Initialize the new set. 2240 */ 2241 CHECK_TYPE(XPATH_NODESET); 2242 obj = valuePop(ctxt); 2243 oldset = obj->nodesetval; 2244 ctxt->context->node = NULL; 2245 2246 cur = ctxt->cur; 2247 newset = xmlXPtrLocationSetCreate(NULL); 2248 2249 for (i = 0; i < oldset->nodeNr; i++) { 2250 ctxt->cur = cur; 2251 2252 /* 2253 * Run the evaluation with a node list made of a single item 2254 * in the nodeset. 2255 */ 2256 ctxt->context->node = oldset->nodeTab[i]; 2257 tmp = xmlXPathNewNodeSet(ctxt->context->node); 2258 valuePush(ctxt, tmp); 2259 2260 xmlXPathEvalExpr(ctxt); 2261 CHECK_ERROR; 2262 2263 /* 2264 * The result of the evaluation need to be tested to 2265 * decided whether the filter succeeded or not 2266 */ 2267 res = valuePop(ctxt); 2268 range = xmlXPtrNewRangeNodeObject(oldset->nodeTab[i], res); 2269 if (range != NULL) { 2270 xmlXPtrLocationSetAdd(newset, range); 2271 } 2272 2273 /* 2274 * Cleanup 2275 */ 2276 if (res != NULL) 2277 xmlXPathFreeObject(res); 2278 if (ctxt->value == tmp) { 2279 res = valuePop(ctxt); 2280 xmlXPathFreeObject(res); 2281 } 2282 2283 ctxt->context->node = NULL; 2284 } 2285 2286 /* 2287 * The result is used as the new evaluation set. 2288 */ 2289 xmlXPathFreeObject(obj); 2290 ctxt->context->node = NULL; 2291 ctxt->context->contextSize = -1; 2292 ctxt->context->proximityPosition = -1; 2293 valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); 2294} 2295 2296/** 2297 * xmlXPtrAdvanceNode: 2298 * @cur: the node 2299 * @level: incremented/decremented to show level in tree 2300 * 2301 * Advance to the next element or text node in document order 2302 * TODO: add a stack for entering/exiting entities 2303 * 2304 * Returns -1 in case of failure, 0 otherwise 2305 */ 2306xmlNodePtr 2307xmlXPtrAdvanceNode(xmlNodePtr cur, int *level) { 2308next: 2309 if ((cur == NULL) || (cur->type == XML_NAMESPACE_DECL)) 2310 return(NULL); 2311 if (cur->children != NULL) { 2312 cur = cur->children ; 2313 if (level != NULL) 2314 (*level)++; 2315 goto found; 2316 } 2317skip: /* This label should only be needed if something is wrong! */ 2318 if (cur->next != NULL) { 2319 cur = cur->next; 2320 goto found; 2321 } 2322 do { 2323 cur = cur->parent; 2324 if (level != NULL) 2325 (*level)--; 2326 if (cur == NULL) return(NULL); 2327 if (cur->next != NULL) { 2328 cur = cur->next; 2329 goto found; 2330 } 2331 } while (cur != NULL); 2332 2333found: 2334 if ((cur->type != XML_ELEMENT_NODE) && 2335 (cur->type != XML_TEXT_NODE) && 2336 (cur->type != XML_DOCUMENT_NODE) && 2337 (cur->type != XML_HTML_DOCUMENT_NODE) && 2338 (cur->type != XML_CDATA_SECTION_NODE)) { 2339 if (cur->type == XML_ENTITY_REF_NODE) { /* Shouldn't happen */ 2340 TODO 2341 goto skip; 2342 } 2343 goto next; 2344 } 2345 return(cur); 2346} 2347 2348/** 2349 * xmlXPtrAdvanceChar: 2350 * @node: the node 2351 * @indx: the indx 2352 * @bytes: the number of bytes 2353 * 2354 * Advance a point of the associated number of bytes (not UTF8 chars) 2355 * 2356 * Returns -1 in case of failure, 0 otherwise 2357 */ 2358static int 2359xmlXPtrAdvanceChar(xmlNodePtr *node, int *indx, int bytes) { 2360 xmlNodePtr cur; 2361 int pos; 2362 int len; 2363 2364 if ((node == NULL) || (indx == NULL)) 2365 return(-1); 2366 cur = *node; 2367 if ((cur == NULL) || (cur->type == XML_NAMESPACE_DECL)) 2368 return(-1); 2369 pos = *indx; 2370 2371 while (bytes >= 0) { 2372 /* 2373 * First position to the beginning of the first text node 2374 * corresponding to this point 2375 */ 2376 while ((cur != NULL) && 2377 ((cur->type == XML_ELEMENT_NODE) || 2378 (cur->type == XML_DOCUMENT_NODE) || 2379 (cur->type == XML_HTML_DOCUMENT_NODE))) { 2380 if (pos > 0) { 2381 cur = xmlXPtrGetNthChild(cur, pos); 2382 pos = 0; 2383 } else { 2384 cur = xmlXPtrAdvanceNode(cur, NULL); 2385 pos = 0; 2386 } 2387 } 2388 2389 if (cur == NULL) { 2390 *node = NULL; 2391 *indx = 0; 2392 return(-1); 2393 } 2394 2395 /* 2396 * if there is no move needed return the current value. 2397 */ 2398 if (pos == 0) pos = 1; 2399 if (bytes == 0) { 2400 *node = cur; 2401 *indx = pos; 2402 return(0); 2403 } 2404 /* 2405 * We should have a text (or cdata) node ... 2406 */ 2407 len = 0; 2408 if ((cur->type != XML_ELEMENT_NODE) && 2409 (cur->content != NULL)) { 2410 len = xmlStrlen(cur->content); 2411 } 2412 if (pos > len) { 2413 /* Strange, the indx in the text node is greater than it's len */ 2414 STRANGE 2415 pos = len; 2416 } 2417 if (pos + bytes >= len) { 2418 bytes -= (len - pos); 2419 cur = xmlXPtrAdvanceNode(cur, NULL); 2420 pos = 0; 2421 } else if (pos + bytes < len) { 2422 pos += bytes; 2423 *node = cur; 2424 *indx = pos; 2425 return(0); 2426 } 2427 } 2428 return(-1); 2429} 2430 2431/** 2432 * xmlXPtrMatchString: 2433 * @string: the string to search 2434 * @start: the start textnode 2435 * @startindex: the start index 2436 * @end: the end textnode IN/OUT 2437 * @endindex: the end index IN/OUT 2438 * 2439 * Check whether the document contains @string at the position 2440 * (@start, @startindex) and limited by the (@end, @endindex) point 2441 * 2442 * Returns -1 in case of failure, 0 if not found, 1 if found in which case 2443 * (@start, @startindex) will indicate the position of the beginning 2444 * of the range and (@end, @endindex) will indicate the end 2445 * of the range 2446 */ 2447static int 2448xmlXPtrMatchString(const xmlChar *string, xmlNodePtr start, int startindex, 2449 xmlNodePtr *end, int *endindex) { 2450 xmlNodePtr cur; 2451 int pos; /* 0 based */ 2452 int len; /* in bytes */ 2453 int stringlen; /* in bytes */ 2454 int match; 2455 2456 if (string == NULL) 2457 return(-1); 2458 if ((start == NULL) || (start->type == XML_NAMESPACE_DECL)) 2459 return(-1); 2460 if ((end == NULL) || (*end == NULL) || 2461 ((*end)->type == XML_NAMESPACE_DECL) || (endindex == NULL)) 2462 return(-1); 2463 cur = start; 2464 if (cur == NULL) 2465 return(-1); 2466 pos = startindex - 1; 2467 stringlen = xmlStrlen(string); 2468 2469 while (stringlen > 0) { 2470 if ((cur == *end) && (pos + stringlen > *endindex)) 2471 return(0); 2472 2473 if ((cur->type != XML_ELEMENT_NODE) && (cur->content != NULL)) { 2474 len = xmlStrlen(cur->content); 2475 if (len >= pos + stringlen) { 2476 match = (!xmlStrncmp(&cur->content[pos], string, stringlen)); 2477 if (match) { 2478#ifdef DEBUG_RANGES 2479 xmlGenericError(xmlGenericErrorContext, 2480 "found range %d bytes at index %d of ->", 2481 stringlen, pos + 1); 2482 xmlDebugDumpString(stdout, cur->content); 2483 xmlGenericError(xmlGenericErrorContext, "\n"); 2484#endif 2485 *end = cur; 2486 *endindex = pos + stringlen; 2487 return(1); 2488 } else { 2489 return(0); 2490 } 2491 } else { 2492 int sub = len - pos; 2493 match = (!xmlStrncmp(&cur->content[pos], string, sub)); 2494 if (match) { 2495#ifdef DEBUG_RANGES 2496 xmlGenericError(xmlGenericErrorContext, 2497 "found subrange %d bytes at index %d of ->", 2498 sub, pos + 1); 2499 xmlDebugDumpString(stdout, cur->content); 2500 xmlGenericError(xmlGenericErrorContext, "\n"); 2501#endif 2502 string = &string[sub]; 2503 stringlen -= sub; 2504 } else { 2505 return(0); 2506 } 2507 } 2508 } 2509 cur = xmlXPtrAdvanceNode(cur, NULL); 2510 if (cur == NULL) 2511 return(0); 2512 pos = 0; 2513 } 2514 return(1); 2515} 2516 2517/** 2518 * xmlXPtrSearchString: 2519 * @string: the string to search 2520 * @start: the start textnode IN/OUT 2521 * @startindex: the start index IN/OUT 2522 * @end: the end textnode 2523 * @endindex: the end index 2524 * 2525 * Search the next occurrence of @string within the document content 2526 * until the (@end, @endindex) point is reached 2527 * 2528 * Returns -1 in case of failure, 0 if not found, 1 if found in which case 2529 * (@start, @startindex) will indicate the position of the beginning 2530 * of the range and (@end, @endindex) will indicate the end 2531 * of the range 2532 */ 2533static int 2534xmlXPtrSearchString(const xmlChar *string, xmlNodePtr *start, int *startindex, 2535 xmlNodePtr *end, int *endindex) { 2536 xmlNodePtr cur; 2537 const xmlChar *str; 2538 int pos; /* 0 based */ 2539 int len; /* in bytes */ 2540 xmlChar first; 2541 2542 if (string == NULL) 2543 return(-1); 2544 if ((start == NULL) || (*start == NULL) || 2545 ((*start)->type == XML_NAMESPACE_DECL) || (startindex == NULL)) 2546 return(-1); 2547 if ((end == NULL) || (endindex == NULL)) 2548 return(-1); 2549 cur = *start; 2550 pos = *startindex - 1; 2551 first = string[0]; 2552 2553 while (cur != NULL) { 2554 if ((cur->type != XML_ELEMENT_NODE) && (cur->content != NULL)) { 2555 len = xmlStrlen(cur->content); 2556 while (pos <= len) { 2557 if (first != 0) { 2558 str = xmlStrchr(&cur->content[pos], first); 2559 if (str != NULL) { 2560 pos = (str - (xmlChar *)(cur->content)); 2561#ifdef DEBUG_RANGES 2562 xmlGenericError(xmlGenericErrorContext, 2563 "found '%c' at index %d of ->", 2564 first, pos + 1); 2565 xmlDebugDumpString(stdout, cur->content); 2566 xmlGenericError(xmlGenericErrorContext, "\n"); 2567#endif 2568 if (xmlXPtrMatchString(string, cur, pos + 1, 2569 end, endindex)) { 2570 *start = cur; 2571 *startindex = pos + 1; 2572 return(1); 2573 } 2574 pos++; 2575 } else { 2576 pos = len + 1; 2577 } 2578 } else { 2579 /* 2580 * An empty string is considered to match before each 2581 * character of the string-value and after the final 2582 * character. 2583 */ 2584#ifdef DEBUG_RANGES 2585 xmlGenericError(xmlGenericErrorContext, 2586 "found '' at index %d of ->", 2587 pos + 1); 2588 xmlDebugDumpString(stdout, cur->content); 2589 xmlGenericError(xmlGenericErrorContext, "\n"); 2590#endif 2591 *start = cur; 2592 *startindex = pos + 1; 2593 *end = cur; 2594 *endindex = pos + 1; 2595 return(1); 2596 } 2597 } 2598 } 2599 if ((cur == *end) && (pos >= *endindex)) 2600 return(0); 2601 cur = xmlXPtrAdvanceNode(cur, NULL); 2602 if (cur == NULL) 2603 return(0); 2604 pos = 1; 2605 } 2606 return(0); 2607} 2608 2609/** 2610 * xmlXPtrGetLastChar: 2611 * @node: the node 2612 * @index: the index 2613 * 2614 * Computes the point coordinates of the last char of this point 2615 * 2616 * Returns -1 in case of failure, 0 otherwise 2617 */ 2618static int 2619xmlXPtrGetLastChar(xmlNodePtr *node, int *indx) { 2620 xmlNodePtr cur; 2621 int pos, len = 0; 2622 2623 if ((node == NULL) || (*node == NULL) || 2624 ((*node)->type == XML_NAMESPACE_DECL) || (indx == NULL)) 2625 return(-1); 2626 cur = *node; 2627 pos = *indx; 2628 2629 if ((cur->type == XML_ELEMENT_NODE) || 2630 (cur->type == XML_DOCUMENT_NODE) || 2631 (cur->type == XML_HTML_DOCUMENT_NODE)) { 2632 if (pos > 0) { 2633 cur = xmlXPtrGetNthChild(cur, pos); 2634 } 2635 } 2636 while (cur != NULL) { 2637 if (cur->last != NULL) 2638 cur = cur->last; 2639 else if ((cur->type != XML_ELEMENT_NODE) && 2640 (cur->content != NULL)) { 2641 len = xmlStrlen(cur->content); 2642 break; 2643 } else { 2644 return(-1); 2645 } 2646 } 2647 if (cur == NULL) 2648 return(-1); 2649 *node = cur; 2650 *indx = len; 2651 return(0); 2652} 2653 2654/** 2655 * xmlXPtrGetStartPoint: 2656 * @obj: an range 2657 * @node: the resulting node 2658 * @indx: the resulting index 2659 * 2660 * read the object and return the start point coordinates. 2661 * 2662 * Returns -1 in case of failure, 0 otherwise 2663 */ 2664static int 2665xmlXPtrGetStartPoint(xmlXPathObjectPtr obj, xmlNodePtr *node, int *indx) { 2666 if ((obj == NULL) || (node == NULL) || (indx == NULL)) 2667 return(-1); 2668 2669 switch (obj->type) { 2670 case XPATH_POINT: 2671 *node = obj->user; 2672 if (obj->index <= 0) 2673 *indx = 0; 2674 else 2675 *indx = obj->index; 2676 return(0); 2677 case XPATH_RANGE: 2678 *node = obj->user; 2679 if (obj->index <= 0) 2680 *indx = 0; 2681 else 2682 *indx = obj->index; 2683 return(0); 2684 default: 2685 break; 2686 } 2687 return(-1); 2688} 2689 2690/** 2691 * xmlXPtrGetEndPoint: 2692 * @obj: an range 2693 * @node: the resulting node 2694 * @indx: the resulting indx 2695 * 2696 * read the object and return the end point coordinates. 2697 * 2698 * Returns -1 in case of failure, 0 otherwise 2699 */ 2700static int 2701xmlXPtrGetEndPoint(xmlXPathObjectPtr obj, xmlNodePtr *node, int *indx) { 2702 if ((obj == NULL) || (node == NULL) || (indx == NULL)) 2703 return(-1); 2704 2705 switch (obj->type) { 2706 case XPATH_POINT: 2707 *node = obj->user; 2708 if (obj->index <= 0) 2709 *indx = 0; 2710 else 2711 *indx = obj->index; 2712 return(0); 2713 case XPATH_RANGE: 2714 *node = obj->user; 2715 if (obj->index <= 0) 2716 *indx = 0; 2717 else 2718 *indx = obj->index; 2719 return(0); 2720 default: 2721 break; 2722 } 2723 return(-1); 2724} 2725 2726/** 2727 * xmlXPtrStringRangeFunction: 2728 * @ctxt: the XPointer Parser context 2729 * @nargs: the number of args 2730 * 2731 * Function implementing the string-range() function 2732 * range as described in 5.4.2 2733 * 2734 * ------------------------------ 2735 * [Definition: For each location in the location-set argument, 2736 * string-range returns a set of string ranges, a set of substrings in a 2737 * string. Specifically, the string-value of the location is searched for 2738 * substrings that match the string argument, and the resulting location-set 2739 * will contain a range location for each non-overlapping match.] 2740 * An empty string is considered to match before each character of the 2741 * string-value and after the final character. Whitespace in a string 2742 * is matched literally, with no normalization except that provided by 2743 * XML for line ends. The third argument gives the position of the first 2744 * character to be in the resulting range, relative to the start of the 2745 * match. The default value is 1, which makes the range start immediately 2746 * before the first character of the matched string. The fourth argument 2747 * gives the number of characters in the range; the default is that the 2748 * range extends to the end of the matched string. 2749 * 2750 * Element boundaries, as well as entire embedded nodes such as processing 2751 * instructions and comments, are ignored as defined in [XPath]. 2752 * 2753 * If the string in the second argument is not found in the string-value 2754 * of the location, or if a value in the third or fourth argument indicates 2755 * a string that is beyond the beginning or end of the document, the 2756 * expression fails. 2757 * 2758 * The points of the range-locations in the returned location-set will 2759 * all be character points. 2760 * ------------------------------ 2761 */ 2762static void 2763xmlXPtrStringRangeFunction(xmlXPathParserContextPtr ctxt, int nargs) { 2764 int i, startindex, endindex = 0, fendindex; 2765 xmlNodePtr start, end = 0, fend; 2766 xmlXPathObjectPtr set; 2767 xmlLocationSetPtr oldset; 2768 xmlLocationSetPtr newset; 2769 xmlXPathObjectPtr string; 2770 xmlXPathObjectPtr position = NULL; 2771 xmlXPathObjectPtr number = NULL; 2772 int found, pos = 0, num = 0; 2773 2774 /* 2775 * Grab the arguments 2776 */ 2777 if ((nargs < 2) || (nargs > 4)) 2778 XP_ERROR(XPATH_INVALID_ARITY); 2779 2780 if (nargs >= 4) { 2781 CHECK_TYPE(XPATH_NUMBER); 2782 number = valuePop(ctxt); 2783 if (number != NULL) 2784 num = (int) number->floatval; 2785 } 2786 if (nargs >= 3) { 2787 CHECK_TYPE(XPATH_NUMBER); 2788 position = valuePop(ctxt); 2789 if (position != NULL) 2790 pos = (int) position->floatval; 2791 } 2792 CHECK_TYPE(XPATH_STRING); 2793 string = valuePop(ctxt); 2794 if ((ctxt->value == NULL) || 2795 ((ctxt->value->type != XPATH_LOCATIONSET) && 2796 (ctxt->value->type != XPATH_NODESET))) 2797 XP_ERROR(XPATH_INVALID_TYPE) 2798 2799 set = valuePop(ctxt); 2800 newset = xmlXPtrLocationSetCreate(NULL); 2801 if (set->nodesetval == NULL) { 2802 goto error; 2803 } 2804 if (set->type == XPATH_NODESET) { 2805 xmlXPathObjectPtr tmp; 2806 2807 /* 2808 * First convert to a location set 2809 */ 2810 tmp = xmlXPtrNewLocationSetNodeSet(set->nodesetval); 2811 xmlXPathFreeObject(set); 2812 set = tmp; 2813 } 2814 oldset = (xmlLocationSetPtr) set->user; 2815 2816 /* 2817 * The loop is to search for each element in the location set 2818 * the list of location set corresponding to that search 2819 */ 2820 for (i = 0;i < oldset->locNr;i++) { 2821#ifdef DEBUG_RANGES 2822 xmlXPathDebugDumpObject(stdout, oldset->locTab[i], 0); 2823#endif 2824 2825 xmlXPtrGetStartPoint(oldset->locTab[i], &start, &startindex); 2826 xmlXPtrGetEndPoint(oldset->locTab[i], &end, &endindex); 2827 xmlXPtrAdvanceChar(&start, &startindex, 0); 2828 xmlXPtrGetLastChar(&end, &endindex); 2829 2830#ifdef DEBUG_RANGES 2831 xmlGenericError(xmlGenericErrorContext, 2832 "from index %d of ->", startindex); 2833 xmlDebugDumpString(stdout, start->content); 2834 xmlGenericError(xmlGenericErrorContext, "\n"); 2835 xmlGenericError(xmlGenericErrorContext, 2836 "to index %d of ->", endindex); 2837 xmlDebugDumpString(stdout, end->content); 2838 xmlGenericError(xmlGenericErrorContext, "\n"); 2839#endif 2840 do { 2841 fend = end; 2842 fendindex = endindex; 2843 found = xmlXPtrSearchString(string->stringval, &start, &startindex, 2844 &fend, &fendindex); 2845 if (found == 1) { 2846 if (position == NULL) { 2847 xmlXPtrLocationSetAdd(newset, 2848 xmlXPtrNewRange(start, startindex, fend, fendindex)); 2849 } else if (xmlXPtrAdvanceChar(&start, &startindex, 2850 pos - 1) == 0) { 2851 if ((number != NULL) && (num > 0)) { 2852 int rindx; 2853 xmlNodePtr rend; 2854 rend = start; 2855 rindx = startindex - 1; 2856 if (xmlXPtrAdvanceChar(&rend, &rindx, 2857 num) == 0) { 2858 xmlXPtrLocationSetAdd(newset, 2859 xmlXPtrNewRange(start, startindex, 2860 rend, rindx)); 2861 } 2862 } else if ((number != NULL) && (num <= 0)) { 2863 xmlXPtrLocationSetAdd(newset, 2864 xmlXPtrNewRange(start, startindex, 2865 start, startindex)); 2866 } else { 2867 xmlXPtrLocationSetAdd(newset, 2868 xmlXPtrNewRange(start, startindex, 2869 fend, fendindex)); 2870 } 2871 } 2872 start = fend; 2873 startindex = fendindex; 2874 if (string->stringval[0] == 0) 2875 startindex++; 2876 } 2877 } while (found == 1); 2878 } 2879 2880 /* 2881 * Save the new value and cleanup 2882 */ 2883error: 2884 valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); 2885 xmlXPathFreeObject(set); 2886 xmlXPathFreeObject(string); 2887 if (position) xmlXPathFreeObject(position); 2888 if (number) xmlXPathFreeObject(number); 2889} 2890 2891/** 2892 * xmlXPtrEvalRangePredicate: 2893 * @ctxt: the XPointer Parser context 2894 * 2895 * [8] Predicate ::= '[' PredicateExpr ']' 2896 * [9] PredicateExpr ::= Expr 2897 * 2898 * Evaluate a predicate as in xmlXPathEvalPredicate() but for 2899 * a Location Set instead of a node set 2900 */ 2901void 2902xmlXPtrEvalRangePredicate(xmlXPathParserContextPtr ctxt) { 2903 const xmlChar *cur; 2904 xmlXPathObjectPtr res; 2905 xmlXPathObjectPtr obj, tmp; 2906 xmlLocationSetPtr newset = NULL; 2907 xmlLocationSetPtr oldset; 2908 int i; 2909 2910 if (ctxt == NULL) return; 2911 2912 SKIP_BLANKS; 2913 if (CUR != '[') { 2914 XP_ERROR(XPATH_INVALID_PREDICATE_ERROR); 2915 } 2916 NEXT; 2917 SKIP_BLANKS; 2918 2919 /* 2920 * Extract the old set, and then evaluate the result of the 2921 * expression for all the element in the set. use it to grow 2922 * up a new set. 2923 */ 2924 CHECK_TYPE(XPATH_LOCATIONSET); 2925 obj = valuePop(ctxt); 2926 oldset = obj->user; 2927 ctxt->context->node = NULL; 2928 2929 if ((oldset == NULL) || (oldset->locNr == 0)) { 2930 ctxt->context->contextSize = 0; 2931 ctxt->context->proximityPosition = 0; 2932 xmlXPathEvalExpr(ctxt); 2933 res = valuePop(ctxt); 2934 if (res != NULL) 2935 xmlXPathFreeObject(res); 2936 valuePush(ctxt, obj); 2937 CHECK_ERROR; 2938 } else { 2939 /* 2940 * Save the expression pointer since we will have to evaluate 2941 * it multiple times. Initialize the new set. 2942 */ 2943 cur = ctxt->cur; 2944 newset = xmlXPtrLocationSetCreate(NULL); 2945 2946 for (i = 0; i < oldset->locNr; i++) { 2947 ctxt->cur = cur; 2948 2949 /* 2950 * Run the evaluation with a node list made of a single item 2951 * in the nodeset. 2952 */ 2953 ctxt->context->node = oldset->locTab[i]->user; 2954 tmp = xmlXPathNewNodeSet(ctxt->context->node); 2955 valuePush(ctxt, tmp); 2956 ctxt->context->contextSize = oldset->locNr; 2957 ctxt->context->proximityPosition = i + 1; 2958 2959 xmlXPathEvalExpr(ctxt); 2960 CHECK_ERROR; 2961 2962 /* 2963 * The result of the evaluation need to be tested to 2964 * decided whether the filter succeeded or not 2965 */ 2966 res = valuePop(ctxt); 2967 if (xmlXPathEvaluatePredicateResult(ctxt, res)) { 2968 xmlXPtrLocationSetAdd(newset, 2969 xmlXPathObjectCopy(oldset->locTab[i])); 2970 } 2971 2972 /* 2973 * Cleanup 2974 */ 2975 if (res != NULL) 2976 xmlXPathFreeObject(res); 2977 if (ctxt->value == tmp) { 2978 res = valuePop(ctxt); 2979 xmlXPathFreeObject(res); 2980 } 2981 2982 ctxt->context->node = NULL; 2983 } 2984 2985 /* 2986 * The result is used as the new evaluation set. 2987 */ 2988 xmlXPathFreeObject(obj); 2989 ctxt->context->node = NULL; 2990 ctxt->context->contextSize = -1; 2991 ctxt->context->proximityPosition = -1; 2992 valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); 2993 } 2994 if (CUR != ']') { 2995 XP_ERROR(XPATH_INVALID_PREDICATE_ERROR); 2996 } 2997 2998 NEXT; 2999 SKIP_BLANKS; 3000} 3001 3002#define bottom_xpointer 3003#include "elfgcchack.h" 3004#endif 3005 3006