Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1 | /* |
| 2 | * xpointer.c : Code to handle XML Pointer |
| 3 | * |
| 4 | * World Wide Web Consortium Working Draft 03-March-1998 |
| 5 | * http://www.w3.org/TR/2000/CR-xptr-20000607 |
| 6 | * |
| 7 | * See Copyright for the status of this software. |
| 8 | * |
Daniel Veillard | c5d6434 | 2001-06-24 12:13:24 +0000 | [diff] [blame] | 9 | * daniel@veillard.com |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 10 | */ |
| 11 | |
Daniel Veillard | 34ce8be | 2002-03-18 19:37:11 +0000 | [diff] [blame] | 12 | #define IN_LIBXML |
Bjorn Reese | 70a9da5 | 2001-04-21 16:57:29 +0000 | [diff] [blame] | 13 | #include "libxml.h" |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 14 | |
Daniel Veillard | f69bb4b | 2001-05-19 13:24:56 +0000 | [diff] [blame] | 15 | /* |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 16 | * TODO: better handling of error cases, the full expression should |
| 17 | * be parsed beforehand instead of a progressive evaluation |
| 18 | * TODO: Access into entities references are not supported now ... |
| 19 | * need a start to be able to pop out of entities refs since |
| 20 | * parent is the endity declaration, not the ref. |
| 21 | */ |
| 22 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 23 | #include <string.h> |
| 24 | #include <libxml/xpointer.h> |
| 25 | #include <libxml/xmlmemory.h> |
| 26 | #include <libxml/parserInternals.h> |
| 27 | #include <libxml/uri.h> |
| 28 | #include <libxml/xpath.h> |
| 29 | #include <libxml/xpathInternals.h> |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 30 | #include <libxml/xmlerror.h> |
Daniel Veillard | 3c01b1d | 2001-10-17 15:58:35 +0000 | [diff] [blame] | 31 | #include <libxml/globals.h> |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 32 | |
| 33 | #ifdef LIBXML_XPTR_ENABLED |
| 34 | |
| 35 | /* Add support of the xmlns() xpointer scheme to initialize the namespaces */ |
| 36 | #define XPTR_XMLNS_SCHEME |
| 37 | |
| 38 | /* #define DEBUG_RANGES */ |
Daniel Veillard | 017b108 | 2001-06-21 11:20:21 +0000 | [diff] [blame] | 39 | #ifdef DEBUG_RANGES |
| 40 | #ifdef LIBXML_DEBUG_ENABLED |
| 41 | #include <libxml/debugXML.h> |
| 42 | #endif |
| 43 | #endif |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 44 | |
| 45 | #define TODO \ |
| 46 | xmlGenericError(xmlGenericErrorContext, \ |
| 47 | "Unimplemented block at %s:%d\n", \ |
| 48 | __FILE__, __LINE__); |
| 49 | |
| 50 | #define STRANGE \ |
| 51 | xmlGenericError(xmlGenericErrorContext, \ |
| 52 | "Internal error at %s:%d\n", \ |
| 53 | __FILE__, __LINE__); |
| 54 | |
| 55 | /************************************************************************ |
| 56 | * * |
| 57 | * A few helper functions for child sequences * |
| 58 | * * |
| 59 | ************************************************************************/ |
| 60 | |
| 61 | xmlNodePtr xmlXPtrAdvanceNode(xmlNodePtr cur); |
| 62 | /** |
| 63 | * xmlXPtrGetArity: |
| 64 | * @cur: the node |
| 65 | * |
| 66 | * Returns the number of child for an element, -1 in case of error |
| 67 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 68 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 69 | xmlXPtrGetArity(xmlNodePtr cur) { |
| 70 | int i; |
| 71 | if (cur == NULL) |
| 72 | return(-1); |
| 73 | cur = cur->children; |
| 74 | for (i = 0;cur != NULL;cur = cur->next) { |
| 75 | if ((cur->type == XML_ELEMENT_NODE) || |
| 76 | (cur->type == XML_DOCUMENT_NODE) || |
| 77 | (cur->type == XML_HTML_DOCUMENT_NODE)) { |
| 78 | i++; |
| 79 | } |
| 80 | } |
| 81 | return(i); |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * xmlXPtrGetIndex: |
| 86 | * @cur: the node |
| 87 | * |
| 88 | * Returns the index of the node in its parent children list, -1 |
| 89 | * in case of error |
| 90 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 91 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 92 | xmlXPtrGetIndex(xmlNodePtr cur) { |
| 93 | int i; |
| 94 | if (cur == NULL) |
| 95 | return(-1); |
| 96 | for (i = 1;cur != NULL;cur = cur->prev) { |
| 97 | if ((cur->type == XML_ELEMENT_NODE) || |
| 98 | (cur->type == XML_DOCUMENT_NODE) || |
| 99 | (cur->type == XML_HTML_DOCUMENT_NODE)) { |
| 100 | i++; |
| 101 | } |
| 102 | } |
| 103 | return(i); |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * xmlXPtrGetNthChild: |
| 108 | * @cur: the node |
| 109 | * @no: the child number |
| 110 | * |
| 111 | * Returns the @no'th element child of @cur or NULL |
| 112 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 113 | static xmlNodePtr |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 114 | xmlXPtrGetNthChild(xmlNodePtr cur, int no) { |
| 115 | int i; |
| 116 | if (cur == NULL) |
| 117 | return(cur); |
| 118 | cur = cur->children; |
| 119 | for (i = 0;i <= no;cur = cur->next) { |
| 120 | if (cur == NULL) |
| 121 | return(cur); |
| 122 | if ((cur->type == XML_ELEMENT_NODE) || |
| 123 | (cur->type == XML_DOCUMENT_NODE) || |
| 124 | (cur->type == XML_HTML_DOCUMENT_NODE)) { |
| 125 | i++; |
| 126 | if (i == no) |
| 127 | break; |
| 128 | } |
| 129 | } |
| 130 | return(cur); |
| 131 | } |
| 132 | |
| 133 | /************************************************************************ |
| 134 | * * |
| 135 | * Handling of XPointer specific types * |
| 136 | * * |
| 137 | ************************************************************************/ |
| 138 | |
| 139 | /** |
| 140 | * xmlXPtrCmpPoints: |
| 141 | * @node1: the first node |
| 142 | * @index1: the first index |
| 143 | * @node2: the second node |
| 144 | * @index2: the second index |
| 145 | * |
| 146 | * Compare two points w.r.t document order |
| 147 | * |
| 148 | * Returns -2 in case of error 1 if first point < second point, 0 if |
| 149 | * that's the same point, -1 otherwise |
| 150 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 151 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 152 | xmlXPtrCmpPoints(xmlNodePtr node1, int index1, xmlNodePtr node2, int index2) { |
| 153 | if ((node1 == NULL) || (node2 == NULL)) |
| 154 | return(-2); |
| 155 | /* |
| 156 | * a couple of optimizations which will avoid computations in most cases |
| 157 | */ |
| 158 | if (node1 == node2) { |
| 159 | if (index1 < index2) |
| 160 | return(1); |
| 161 | if (index1 > index2) |
| 162 | return(-1); |
| 163 | return(0); |
| 164 | } |
| 165 | return(xmlXPathCmpNodes(node1, node2)); |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * xmlXPtrNewPoint: |
| 170 | * @node: the xmlNodePtr |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 171 | * @indx: the indx within the node |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 172 | * |
| 173 | * Create a new xmlXPathObjectPtr of type point |
| 174 | * |
| 175 | * Returns the newly created object. |
| 176 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 177 | static xmlXPathObjectPtr |
| 178 | xmlXPtrNewPoint(xmlNodePtr node, int indx) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 179 | xmlXPathObjectPtr ret; |
| 180 | |
| 181 | if (node == NULL) |
| 182 | return(NULL); |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 183 | if (indx < 0) |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 184 | return(NULL); |
| 185 | |
| 186 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 187 | if (ret == NULL) { |
| 188 | xmlGenericError(xmlGenericErrorContext, |
| 189 | "xmlXPtrNewPoint: out of memory\n"); |
| 190 | return(NULL); |
| 191 | } |
| 192 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 193 | ret->type = XPATH_POINT; |
| 194 | ret->user = (void *) node; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 195 | ret->index = indx; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 196 | return(ret); |
| 197 | } |
| 198 | |
| 199 | /** |
| 200 | * xmlXPtrRangeCheckOrder: |
| 201 | * @range: an object range |
| 202 | * |
| 203 | * Make sure the points in the range are in the right order |
| 204 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 205 | static void |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 206 | xmlXPtrRangeCheckOrder(xmlXPathObjectPtr range) { |
| 207 | int tmp; |
| 208 | xmlNodePtr tmp2; |
| 209 | if (range == NULL) |
| 210 | return; |
| 211 | if (range->type != XPATH_RANGE) |
| 212 | return; |
| 213 | if (range->user2 == NULL) |
| 214 | return; |
| 215 | tmp = xmlXPtrCmpPoints(range->user, range->index, |
| 216 | range->user2, range->index2); |
| 217 | if (tmp == -1) { |
| 218 | tmp2 = range->user; |
| 219 | range->user = range->user2; |
| 220 | range->user2 = tmp2; |
| 221 | tmp = range->index; |
| 222 | range->index = range->index2; |
| 223 | range->index2 = tmp; |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | /** |
| 228 | * xmlXPtrRangesEqual: |
| 229 | * @range1: the first range |
| 230 | * @range2: the second range |
| 231 | * |
| 232 | * Compare two ranges |
| 233 | * |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 234 | * Returns 1 if equal, 0 otherwise |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 235 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 236 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 237 | xmlXPtrRangesEqual(xmlXPathObjectPtr range1, xmlXPathObjectPtr range2) { |
| 238 | if (range1 == range2) |
| 239 | return(1); |
| 240 | if ((range1 == NULL) || (range2 == NULL)) |
| 241 | return(0); |
| 242 | if (range1->type != range2->type) |
| 243 | return(0); |
| 244 | if (range1->type != XPATH_RANGE) |
| 245 | return(0); |
| 246 | if (range1->user != range2->user) |
| 247 | return(0); |
| 248 | if (range1->index != range2->index) |
| 249 | return(0); |
| 250 | if (range1->user2 != range2->user2) |
| 251 | return(0); |
| 252 | if (range1->index2 != range2->index2) |
| 253 | return(0); |
| 254 | return(1); |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * xmlXPtrNewRange: |
| 259 | * @start: the starting node |
| 260 | * @startindex: the start index |
| 261 | * @end: the ending point |
| 262 | * @endindex: the ending index |
| 263 | * |
| 264 | * Create a new xmlXPathObjectPtr of type range |
| 265 | * |
| 266 | * Returns the newly created object. |
| 267 | */ |
| 268 | xmlXPathObjectPtr |
| 269 | xmlXPtrNewRange(xmlNodePtr start, int startindex, |
| 270 | xmlNodePtr end, int endindex) { |
| 271 | xmlXPathObjectPtr ret; |
| 272 | |
| 273 | if (start == NULL) |
| 274 | return(NULL); |
| 275 | if (end == NULL) |
| 276 | return(NULL); |
| 277 | if (startindex < 0) |
| 278 | return(NULL); |
| 279 | if (endindex < 0) |
| 280 | return(NULL); |
| 281 | |
| 282 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 283 | if (ret == NULL) { |
| 284 | xmlGenericError(xmlGenericErrorContext, |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 285 | "xmlXPtrNewRange: out of memory\n"); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 286 | return(NULL); |
| 287 | } |
| 288 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 289 | ret->type = XPATH_RANGE; |
| 290 | ret->user = start; |
| 291 | ret->index = startindex; |
| 292 | ret->user2 = end; |
| 293 | ret->index2 = endindex; |
| 294 | xmlXPtrRangeCheckOrder(ret); |
| 295 | return(ret); |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * xmlXPtrNewRangePoints: |
| 300 | * @start: the starting point |
| 301 | * @end: the ending point |
| 302 | * |
| 303 | * Create a new xmlXPathObjectPtr of type range using 2 Points |
| 304 | * |
| 305 | * Returns the newly created object. |
| 306 | */ |
| 307 | xmlXPathObjectPtr |
| 308 | xmlXPtrNewRangePoints(xmlXPathObjectPtr start, xmlXPathObjectPtr end) { |
| 309 | xmlXPathObjectPtr ret; |
| 310 | |
| 311 | if (start == NULL) |
| 312 | return(NULL); |
| 313 | if (end == NULL) |
| 314 | return(NULL); |
| 315 | if (start->type != XPATH_POINT) |
| 316 | return(NULL); |
| 317 | if (end->type != XPATH_POINT) |
| 318 | return(NULL); |
| 319 | |
| 320 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 321 | if (ret == NULL) { |
| 322 | xmlGenericError(xmlGenericErrorContext, |
| 323 | "xmlXPtrNewRangePoints: out of memory\n"); |
| 324 | return(NULL); |
| 325 | } |
| 326 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 327 | ret->type = XPATH_RANGE; |
| 328 | ret->user = start->user; |
| 329 | ret->index = start->index; |
| 330 | ret->user2 = end->user; |
| 331 | ret->index2 = end->index; |
| 332 | xmlXPtrRangeCheckOrder(ret); |
| 333 | return(ret); |
| 334 | } |
| 335 | |
| 336 | /** |
| 337 | * xmlXPtrNewRangePointNode: |
| 338 | * @start: the starting point |
| 339 | * @end: the ending node |
| 340 | * |
| 341 | * Create a new xmlXPathObjectPtr of type range from a point to a node |
| 342 | * |
| 343 | * Returns the newly created object. |
| 344 | */ |
| 345 | xmlXPathObjectPtr |
| 346 | xmlXPtrNewRangePointNode(xmlXPathObjectPtr start, xmlNodePtr end) { |
| 347 | xmlXPathObjectPtr ret; |
| 348 | |
| 349 | if (start == NULL) |
| 350 | return(NULL); |
| 351 | if (end == NULL) |
| 352 | return(NULL); |
| 353 | if (start->type != XPATH_POINT) |
| 354 | return(NULL); |
| 355 | |
| 356 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 357 | if (ret == NULL) { |
| 358 | xmlGenericError(xmlGenericErrorContext, |
| 359 | "xmlXPtrNewRangePointNode: out of memory\n"); |
| 360 | return(NULL); |
| 361 | } |
| 362 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 363 | ret->type = XPATH_RANGE; |
| 364 | ret->user = start->user; |
| 365 | ret->index = start->index; |
| 366 | ret->user2 = end; |
| 367 | ret->index2 = -1; |
| 368 | xmlXPtrRangeCheckOrder(ret); |
| 369 | return(ret); |
| 370 | } |
| 371 | |
| 372 | /** |
| 373 | * xmlXPtrNewRangeNodePoint: |
| 374 | * @start: the starting node |
| 375 | * @end: the ending point |
| 376 | * |
| 377 | * Create a new xmlXPathObjectPtr of type range from a node to a point |
| 378 | * |
| 379 | * Returns the newly created object. |
| 380 | */ |
| 381 | xmlXPathObjectPtr |
| 382 | xmlXPtrNewRangeNodePoint(xmlNodePtr start, xmlXPathObjectPtr end) { |
| 383 | xmlXPathObjectPtr ret; |
| 384 | |
| 385 | if (start == NULL) |
| 386 | return(NULL); |
| 387 | if (end == NULL) |
| 388 | return(NULL); |
| 389 | if (start->type != XPATH_POINT) |
| 390 | return(NULL); |
| 391 | if (end->type != XPATH_POINT) |
| 392 | return(NULL); |
| 393 | |
| 394 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 395 | if (ret == NULL) { |
| 396 | xmlGenericError(xmlGenericErrorContext, |
| 397 | "xmlXPtrNewRangeNodePoint: out of memory\n"); |
| 398 | return(NULL); |
| 399 | } |
| 400 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 401 | ret->type = XPATH_RANGE; |
| 402 | ret->user = start; |
| 403 | ret->index = -1; |
| 404 | ret->user2 = end->user; |
| 405 | ret->index2 = end->index; |
| 406 | xmlXPtrRangeCheckOrder(ret); |
| 407 | return(ret); |
| 408 | } |
| 409 | |
| 410 | /** |
| 411 | * xmlXPtrNewRangeNodes: |
| 412 | * @start: the starting node |
| 413 | * @end: the ending node |
| 414 | * |
| 415 | * Create a new xmlXPathObjectPtr of type range using 2 nodes |
| 416 | * |
| 417 | * Returns the newly created object. |
| 418 | */ |
| 419 | xmlXPathObjectPtr |
| 420 | xmlXPtrNewRangeNodes(xmlNodePtr start, xmlNodePtr end) { |
| 421 | xmlXPathObjectPtr ret; |
| 422 | |
| 423 | if (start == NULL) |
| 424 | return(NULL); |
| 425 | if (end == NULL) |
| 426 | return(NULL); |
| 427 | |
| 428 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 429 | if (ret == NULL) { |
| 430 | xmlGenericError(xmlGenericErrorContext, |
| 431 | "xmlXPtrNewRangeNodes: out of memory\n"); |
| 432 | return(NULL); |
| 433 | } |
| 434 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 435 | ret->type = XPATH_RANGE; |
| 436 | ret->user = start; |
| 437 | ret->index = -1; |
| 438 | ret->user2 = end; |
| 439 | ret->index2 = -1; |
| 440 | xmlXPtrRangeCheckOrder(ret); |
| 441 | return(ret); |
| 442 | } |
| 443 | |
| 444 | /** |
| 445 | * xmlXPtrNewCollapsedRange: |
| 446 | * @start: the starting and ending node |
| 447 | * |
| 448 | * Create a new xmlXPathObjectPtr of type range using a single nodes |
| 449 | * |
| 450 | * Returns the newly created object. |
| 451 | */ |
| 452 | xmlXPathObjectPtr |
| 453 | xmlXPtrNewCollapsedRange(xmlNodePtr start) { |
| 454 | xmlXPathObjectPtr ret; |
| 455 | |
| 456 | if (start == NULL) |
| 457 | return(NULL); |
| 458 | |
| 459 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 460 | if (ret == NULL) { |
| 461 | xmlGenericError(xmlGenericErrorContext, |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 462 | "xmlXPtrNewCollapsedRange: out of memory\n"); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 463 | return(NULL); |
| 464 | } |
| 465 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 466 | ret->type = XPATH_RANGE; |
| 467 | ret->user = start; |
| 468 | ret->index = -1; |
| 469 | ret->user2 = NULL; |
| 470 | ret->index2 = -1; |
| 471 | return(ret); |
| 472 | } |
| 473 | |
| 474 | /** |
| 475 | * xmlXPtrNewRangeNodeObject: |
| 476 | * @start: the starting node |
| 477 | * @end: the ending object |
| 478 | * |
| 479 | * Create a new xmlXPathObjectPtr of type range from a not to an object |
| 480 | * |
| 481 | * Returns the newly created object. |
| 482 | */ |
| 483 | xmlXPathObjectPtr |
| 484 | xmlXPtrNewRangeNodeObject(xmlNodePtr start, xmlXPathObjectPtr end) { |
| 485 | xmlXPathObjectPtr ret; |
| 486 | |
| 487 | if (start == NULL) |
| 488 | return(NULL); |
| 489 | if (end == NULL) |
| 490 | return(NULL); |
| 491 | switch (end->type) { |
| 492 | case XPATH_POINT: |
| 493 | break; |
| 494 | case XPATH_NODESET: |
| 495 | /* |
| 496 | * Empty set ... |
| 497 | */ |
| 498 | if (end->nodesetval->nodeNr <= 0) |
| 499 | return(NULL); |
| 500 | break; |
| 501 | default: |
| 502 | TODO |
| 503 | return(NULL); |
| 504 | } |
| 505 | |
| 506 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 507 | if (ret == NULL) { |
| 508 | xmlGenericError(xmlGenericErrorContext, |
| 509 | "xmlXPtrNewRangeNodeObject: out of memory\n"); |
| 510 | return(NULL); |
| 511 | } |
| 512 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 513 | ret->type = XPATH_RANGE; |
| 514 | ret->user = start; |
| 515 | ret->index = -1; |
| 516 | switch (end->type) { |
| 517 | case XPATH_POINT: |
| 518 | ret->user2 = end->user; |
| 519 | ret->index2 = end->index; |
| 520 | case XPATH_NODESET: { |
| 521 | ret->user2 = end->nodesetval->nodeTab[end->nodesetval->nodeNr - 1]; |
| 522 | ret->index2 = -1; |
| 523 | break; |
| 524 | } |
| 525 | default: |
| 526 | STRANGE |
| 527 | return(NULL); |
| 528 | } |
| 529 | xmlXPtrRangeCheckOrder(ret); |
| 530 | return(ret); |
| 531 | } |
| 532 | |
| 533 | #define XML_RANGESET_DEFAULT 10 |
| 534 | |
| 535 | /** |
| 536 | * xmlXPtrLocationSetCreate: |
| 537 | * @val: an initial xmlXPathObjectPtr, or NULL |
| 538 | * |
| 539 | * Create a new xmlLocationSetPtr of type double and of value @val |
| 540 | * |
| 541 | * Returns the newly created object. |
| 542 | */ |
| 543 | xmlLocationSetPtr |
| 544 | xmlXPtrLocationSetCreate(xmlXPathObjectPtr val) { |
| 545 | xmlLocationSetPtr ret; |
| 546 | |
| 547 | ret = (xmlLocationSetPtr) xmlMalloc(sizeof(xmlLocationSet)); |
| 548 | if (ret == NULL) { |
| 549 | xmlGenericError(xmlGenericErrorContext, |
| 550 | "xmlXPtrLocationSetCreate: out of memory\n"); |
| 551 | return(NULL); |
| 552 | } |
| 553 | memset(ret, 0 , (size_t) sizeof(xmlLocationSet)); |
| 554 | if (val != NULL) { |
| 555 | ret->locTab = (xmlXPathObjectPtr *) xmlMalloc(XML_RANGESET_DEFAULT * |
| 556 | sizeof(xmlXPathObjectPtr)); |
| 557 | if (ret->locTab == NULL) { |
| 558 | xmlGenericError(xmlGenericErrorContext, |
| 559 | "xmlXPtrLocationSetCreate: out of memory\n"); |
| 560 | return(NULL); |
| 561 | } |
| 562 | memset(ret->locTab, 0 , |
| 563 | XML_RANGESET_DEFAULT * (size_t) sizeof(xmlXPathObjectPtr)); |
| 564 | ret->locMax = XML_RANGESET_DEFAULT; |
| 565 | ret->locTab[ret->locNr++] = val; |
| 566 | } |
| 567 | return(ret); |
| 568 | } |
| 569 | |
| 570 | /** |
| 571 | * xmlXPtrLocationSetAdd: |
| 572 | * @cur: the initial range set |
| 573 | * @val: a new xmlXPathObjectPtr |
| 574 | * |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 575 | * add a new xmlXPathObjectPtr to an existing LocationSet |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 576 | * If the location already exist in the set @val is freed. |
| 577 | */ |
| 578 | void |
| 579 | xmlXPtrLocationSetAdd(xmlLocationSetPtr cur, xmlXPathObjectPtr val) { |
| 580 | int i; |
| 581 | |
| 582 | if (val == NULL) return; |
| 583 | |
| 584 | /* |
| 585 | * check against doublons |
| 586 | */ |
| 587 | for (i = 0;i < cur->locNr;i++) { |
| 588 | if (xmlXPtrRangesEqual(cur->locTab[i], val)) { |
| 589 | xmlXPathFreeObject(val); |
| 590 | return; |
| 591 | } |
| 592 | } |
| 593 | |
| 594 | /* |
| 595 | * grow the locTab if needed |
| 596 | */ |
| 597 | if (cur->locMax == 0) { |
| 598 | cur->locTab = (xmlXPathObjectPtr *) xmlMalloc(XML_RANGESET_DEFAULT * |
| 599 | sizeof(xmlXPathObjectPtr)); |
| 600 | if (cur->locTab == NULL) { |
| 601 | xmlGenericError(xmlGenericErrorContext, |
| 602 | "xmlXPtrLocationSetAdd: out of memory\n"); |
| 603 | return; |
| 604 | } |
| 605 | memset(cur->locTab, 0 , |
| 606 | XML_RANGESET_DEFAULT * (size_t) sizeof(xmlXPathObjectPtr)); |
| 607 | cur->locMax = XML_RANGESET_DEFAULT; |
| 608 | } else if (cur->locNr == cur->locMax) { |
| 609 | xmlXPathObjectPtr *temp; |
| 610 | |
| 611 | cur->locMax *= 2; |
| 612 | temp = (xmlXPathObjectPtr *) xmlRealloc(cur->locTab, cur->locMax * |
| 613 | sizeof(xmlXPathObjectPtr)); |
| 614 | if (temp == NULL) { |
| 615 | xmlGenericError(xmlGenericErrorContext, |
| 616 | "xmlXPtrLocationSetAdd: out of memory\n"); |
| 617 | return; |
| 618 | } |
| 619 | cur->locTab = temp; |
| 620 | } |
| 621 | cur->locTab[cur->locNr++] = val; |
| 622 | } |
| 623 | |
| 624 | /** |
| 625 | * xmlXPtrLocationSetMerge: |
| 626 | * @val1: the first LocationSet |
| 627 | * @val2: the second LocationSet |
| 628 | * |
| 629 | * Merges two rangesets, all ranges from @val2 are added to @val1 |
| 630 | * |
| 631 | * Returns val1 once extended or NULL in case of error. |
| 632 | */ |
| 633 | xmlLocationSetPtr |
| 634 | xmlXPtrLocationSetMerge(xmlLocationSetPtr val1, xmlLocationSetPtr val2) { |
| 635 | int i; |
| 636 | |
| 637 | if (val1 == NULL) return(NULL); |
| 638 | if (val2 == NULL) return(val1); |
| 639 | |
| 640 | /* |
| 641 | * !!!!! this can be optimized a lot, knowing that both |
| 642 | * val1 and val2 already have unicity of their values. |
| 643 | */ |
| 644 | |
| 645 | for (i = 0;i < val2->locNr;i++) |
| 646 | xmlXPtrLocationSetAdd(val1, val2->locTab[i]); |
| 647 | |
| 648 | return(val1); |
| 649 | } |
| 650 | |
| 651 | /** |
| 652 | * xmlXPtrLocationSetDel: |
| 653 | * @cur: the initial range set |
| 654 | * @val: an xmlXPathObjectPtr |
| 655 | * |
| 656 | * Removes an xmlXPathObjectPtr from an existing LocationSet |
| 657 | */ |
| 658 | void |
| 659 | xmlXPtrLocationSetDel(xmlLocationSetPtr cur, xmlXPathObjectPtr val) { |
| 660 | int i; |
| 661 | |
| 662 | if (cur == NULL) return; |
| 663 | if (val == NULL) return; |
| 664 | |
| 665 | /* |
| 666 | * check against doublons |
| 667 | */ |
| 668 | for (i = 0;i < cur->locNr;i++) |
| 669 | if (cur->locTab[i] == val) break; |
| 670 | |
| 671 | if (i >= cur->locNr) { |
| 672 | #ifdef DEBUG |
| 673 | xmlGenericError(xmlGenericErrorContext, |
Daniel Veillard | 913d6e0 | 2001-11-28 14:53:53 +0000 | [diff] [blame] | 674 | "xmlXPtrLocationSetDel: Range wasn't found in RangeList\n"); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 675 | #endif |
| 676 | return; |
| 677 | } |
| 678 | cur->locNr--; |
| 679 | for (;i < cur->locNr;i++) |
| 680 | cur->locTab[i] = cur->locTab[i + 1]; |
| 681 | cur->locTab[cur->locNr] = NULL; |
| 682 | } |
| 683 | |
| 684 | /** |
| 685 | * xmlXPtrLocationSetRemove: |
| 686 | * @cur: the initial range set |
| 687 | * @val: the index to remove |
| 688 | * |
| 689 | * Removes an entry from an existing LocationSet list. |
| 690 | */ |
| 691 | void |
| 692 | xmlXPtrLocationSetRemove(xmlLocationSetPtr cur, int val) { |
| 693 | if (cur == NULL) return; |
| 694 | if (val >= cur->locNr) return; |
| 695 | cur->locNr--; |
| 696 | for (;val < cur->locNr;val++) |
| 697 | cur->locTab[val] = cur->locTab[val + 1]; |
| 698 | cur->locTab[cur->locNr] = NULL; |
| 699 | } |
| 700 | |
| 701 | /** |
| 702 | * xmlXPtrFreeLocationSet: |
| 703 | * @obj: the xmlLocationSetPtr to free |
| 704 | * |
| 705 | * Free the LocationSet compound (not the actual ranges !). |
| 706 | */ |
| 707 | void |
| 708 | xmlXPtrFreeLocationSet(xmlLocationSetPtr obj) { |
| 709 | int i; |
| 710 | |
| 711 | if (obj == NULL) return; |
| 712 | if (obj->locTab != NULL) { |
| 713 | for (i = 0;i < obj->locNr; i++) { |
| 714 | xmlXPathFreeObject(obj->locTab[i]); |
| 715 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 716 | xmlFree(obj->locTab); |
| 717 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 718 | xmlFree(obj); |
| 719 | } |
| 720 | |
| 721 | /** |
| 722 | * xmlXPtrNewLocationSetNodes: |
| 723 | * @start: the start NodePtr value |
| 724 | * @end: the end NodePtr value or NULL |
| 725 | * |
| 726 | * Create a new xmlXPathObjectPtr of type LocationSet and initialize |
| 727 | * it with the single range made of the two nodes @start and @end |
| 728 | * |
| 729 | * Returns the newly created object. |
| 730 | */ |
| 731 | xmlXPathObjectPtr |
| 732 | xmlXPtrNewLocationSetNodes(xmlNodePtr start, xmlNodePtr end) { |
| 733 | xmlXPathObjectPtr ret; |
| 734 | |
| 735 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 736 | if (ret == NULL) { |
| 737 | xmlGenericError(xmlGenericErrorContext, |
| 738 | "xmlXPtrNewLocationSetNodes: out of memory\n"); |
| 739 | return(NULL); |
| 740 | } |
| 741 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 742 | ret->type = XPATH_LOCATIONSET; |
| 743 | if (end == NULL) |
| 744 | ret->user = xmlXPtrLocationSetCreate(xmlXPtrNewCollapsedRange(start)); |
| 745 | else |
| 746 | ret->user = xmlXPtrLocationSetCreate(xmlXPtrNewRangeNodes(start,end)); |
| 747 | return(ret); |
| 748 | } |
| 749 | |
| 750 | /** |
| 751 | * xmlXPtrNewLocationSetNodeSet: |
| 752 | * @set: a node set |
| 753 | * |
| 754 | * Create a new xmlXPathObjectPtr of type LocationSet and initialize |
| 755 | * it with all the nodes from @set |
| 756 | * |
| 757 | * Returns the newly created object. |
| 758 | */ |
| 759 | xmlXPathObjectPtr |
| 760 | xmlXPtrNewLocationSetNodeSet(xmlNodeSetPtr set) { |
| 761 | xmlXPathObjectPtr ret; |
| 762 | |
| 763 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 764 | if (ret == NULL) { |
| 765 | xmlGenericError(xmlGenericErrorContext, |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 766 | "xmlXPtrNewLocationSetNodeSet: out of memory\n"); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 767 | return(NULL); |
| 768 | } |
| 769 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 770 | ret->type = XPATH_LOCATIONSET; |
| 771 | if (set != NULL) { |
| 772 | int i; |
| 773 | xmlLocationSetPtr newset; |
| 774 | |
| 775 | newset = xmlXPtrLocationSetCreate(NULL); |
| 776 | if (newset == NULL) |
| 777 | return(ret); |
| 778 | |
| 779 | for (i = 0;i < set->nodeNr;i++) |
| 780 | xmlXPtrLocationSetAdd(newset, |
| 781 | xmlXPtrNewCollapsedRange(set->nodeTab[i])); |
| 782 | |
| 783 | ret->user = (void *) newset; |
| 784 | } |
| 785 | return(ret); |
| 786 | } |
| 787 | |
| 788 | /** |
| 789 | * xmlXPtrWrapLocationSet: |
| 790 | * @val: the LocationSet value |
| 791 | * |
| 792 | * Wrap the LocationSet @val in a new xmlXPathObjectPtr |
| 793 | * |
| 794 | * Returns the newly created object. |
| 795 | */ |
| 796 | xmlXPathObjectPtr |
| 797 | xmlXPtrWrapLocationSet(xmlLocationSetPtr val) { |
| 798 | xmlXPathObjectPtr ret; |
| 799 | |
| 800 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 801 | if (ret == NULL) { |
| 802 | xmlGenericError(xmlGenericErrorContext, |
| 803 | "xmlXPtrWrapLocationSet: out of memory\n"); |
| 804 | return(NULL); |
| 805 | } |
| 806 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 807 | ret->type = XPATH_LOCATIONSET; |
| 808 | ret->user = (void *) val; |
| 809 | return(ret); |
| 810 | } |
| 811 | |
| 812 | /************************************************************************ |
| 813 | * * |
| 814 | * The parser * |
| 815 | * * |
| 816 | ************************************************************************/ |
| 817 | |
| 818 | /* |
| 819 | * Macros for accessing the content. Those should be used only by the parser, |
| 820 | * and not exported. |
| 821 | * |
| 822 | * Dirty macros, i.e. one need to make assumption on the context to use them |
| 823 | * |
| 824 | * CUR_PTR return the current pointer to the xmlChar to be parsed. |
| 825 | * CUR returns the current xmlChar value, i.e. a 8 bit value |
| 826 | * in ISO-Latin or UTF-8. |
| 827 | * This should be used internally by the parser |
| 828 | * only to compare to ASCII values otherwise it would break when |
| 829 | * running with UTF-8 encoding. |
| 830 | * NXT(n) returns the n'th next xmlChar. Same as CUR is should be used only |
| 831 | * to compare on ASCII based substring. |
| 832 | * SKIP(n) Skip n xmlChar, and must also be used only to skip ASCII defined |
| 833 | * strings within the parser. |
| 834 | * CURRENT Returns the current char value, with the full decoding of |
| 835 | * UTF-8 if we are using this mode. It returns an int. |
| 836 | * NEXT Skip to the next character, this does the proper decoding |
| 837 | * in UTF-8 mode. It also pop-up unfinished entities on the fly. |
| 838 | * It returns the pointer to the current xmlChar. |
| 839 | */ |
| 840 | |
| 841 | #define CUR (*ctxt->cur) |
| 842 | #define SKIP(val) ctxt->cur += (val) |
| 843 | #define NXT(val) ctxt->cur[(val)] |
| 844 | #define CUR_PTR ctxt->cur |
| 845 | |
| 846 | #define SKIP_BLANKS \ |
| 847 | while (IS_BLANK(*(ctxt->cur))) NEXT |
| 848 | |
| 849 | #define CURRENT (*ctxt->cur) |
| 850 | #define NEXT ((*ctxt->cur) ? ctxt->cur++: ctxt->cur) |
| 851 | |
| 852 | /* |
| 853 | * xmlXPtrGetChildNo: |
| 854 | * @ctxt: the XPointer Parser context |
| 855 | * @index: the child number |
| 856 | * |
| 857 | * Move the current node of the nodeset on the stack to the |
| 858 | * given child if found |
| 859 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 860 | static void |
| 861 | xmlXPtrGetChildNo(xmlXPathParserContextPtr ctxt, int indx) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 862 | xmlNodePtr cur = NULL; |
| 863 | xmlXPathObjectPtr obj; |
| 864 | xmlNodeSetPtr oldset; |
| 865 | |
| 866 | CHECK_TYPE(XPATH_NODESET); |
| 867 | obj = valuePop(ctxt); |
| 868 | oldset = obj->nodesetval; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 869 | if ((indx <= 0) || (oldset == NULL) || (oldset->nodeNr != 1)) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 870 | xmlXPathFreeObject(obj); |
| 871 | valuePush(ctxt, xmlXPathNewNodeSet(NULL)); |
| 872 | return; |
| 873 | } |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 874 | cur = xmlXPtrGetNthChild(oldset->nodeTab[0], indx); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 875 | if (cur == NULL) { |
| 876 | xmlXPathFreeObject(obj); |
| 877 | valuePush(ctxt, xmlXPathNewNodeSet(NULL)); |
| 878 | return; |
| 879 | } |
| 880 | oldset->nodeTab[0] = cur; |
| 881 | valuePush(ctxt, obj); |
| 882 | } |
| 883 | |
| 884 | /** |
| 885 | * xmlXPtrEvalXPtrPart: |
| 886 | * @ctxt: the XPointer Parser context |
| 887 | * @name: the preparsed Scheme for the XPtrPart |
| 888 | * |
| 889 | * XPtrPart ::= 'xpointer' '(' XPtrExpr ')' |
| 890 | * | Scheme '(' SchemeSpecificExpr ')' |
| 891 | * |
| 892 | * Scheme ::= NCName - 'xpointer' [VC: Non-XPointer schemes] |
| 893 | * |
| 894 | * SchemeSpecificExpr ::= StringWithBalancedParens |
| 895 | * |
| 896 | * StringWithBalancedParens ::= |
| 897 | * [^()]* ('(' StringWithBalancedParens ')' [^()]*)* |
| 898 | * [VC: Parenthesis escaping] |
| 899 | * |
| 900 | * XPtrExpr ::= Expr [VC: Parenthesis escaping] |
| 901 | * |
| 902 | * VC: Parenthesis escaping: |
| 903 | * The end of an XPointer part is signaled by the right parenthesis ")" |
| 904 | * character that is balanced with the left parenthesis "(" character |
| 905 | * that began the part. Any unbalanced parenthesis character inside the |
| 906 | * expression, even within literals, must be escaped with a circumflex (^) |
| 907 | * character preceding it. If the expression contains any literal |
| 908 | * occurrences of the circumflex, each must be escaped with an additional |
| 909 | * circumflex (that is, ^^). If the unescaped parentheses in the expression |
| 910 | * are not balanced, a syntax error results. |
| 911 | * |
| 912 | * Parse and evaluate an XPtrPart. Basically it generates the unescaped |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 913 | * string and if the scheme is 'xpointer' it will call the XPath interpreter. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 914 | * |
| 915 | * TODO: there is no new scheme registration mechanism |
| 916 | */ |
| 917 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 918 | static void |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 919 | xmlXPtrEvalXPtrPart(xmlXPathParserContextPtr ctxt, xmlChar *name) { |
| 920 | xmlChar *buffer, *cur; |
| 921 | int len; |
| 922 | int level; |
| 923 | |
| 924 | if (name == NULL) |
| 925 | name = xmlXPathParseName(ctxt); |
| 926 | if (name == NULL) |
| 927 | XP_ERROR(XPATH_EXPR_ERROR); |
| 928 | |
| 929 | if (CUR != '(') |
| 930 | XP_ERROR(XPATH_EXPR_ERROR); |
| 931 | NEXT; |
| 932 | level = 1; |
| 933 | |
| 934 | len = xmlStrlen(ctxt->cur); |
| 935 | len++; |
| 936 | buffer = (xmlChar *) xmlMalloc(len * sizeof (xmlChar)); |
| 937 | if (buffer == NULL) { |
| 938 | xmlGenericError(xmlGenericErrorContext, |
| 939 | "xmlXPtrEvalXPtrPart: out of memory\n"); |
| 940 | return; |
| 941 | } |
| 942 | |
| 943 | cur = buffer; |
| 944 | while (CUR != 0) { |
| 945 | if (CUR == ')') { |
| 946 | level--; |
| 947 | if (level == 0) { |
| 948 | NEXT; |
| 949 | break; |
| 950 | } |
| 951 | *cur++ = CUR; |
| 952 | } else if (CUR == '(') { |
| 953 | level++; |
| 954 | *cur++ = CUR; |
| 955 | } else if (CUR == '^') { |
| 956 | NEXT; |
| 957 | if ((CUR == ')') || (CUR == '(') || (CUR == '^')) { |
| 958 | *cur++ = CUR; |
| 959 | } else { |
| 960 | *cur++ = '^'; |
| 961 | *cur++ = CUR; |
| 962 | } |
| 963 | } else { |
| 964 | *cur++ = CUR; |
| 965 | } |
| 966 | NEXT; |
| 967 | } |
| 968 | *cur = 0; |
| 969 | |
| 970 | if ((level != 0) && (CUR == 0)) { |
| 971 | xmlFree(buffer); |
| 972 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 973 | } |
| 974 | |
| 975 | if (xmlStrEqual(name, (xmlChar *) "xpointer")) { |
| 976 | const xmlChar *left = CUR_PTR; |
| 977 | |
| 978 | CUR_PTR = buffer; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 979 | xmlXPathEvalExpr(ctxt); |
| 980 | CUR_PTR=left; |
| 981 | #ifdef XPTR_XMLNS_SCHEME |
| 982 | } else if (xmlStrEqual(name, (xmlChar *) "xmlns")) { |
| 983 | const xmlChar *left = CUR_PTR; |
| 984 | xmlChar *prefix; |
| 985 | xmlChar *URI; |
| 986 | xmlURIPtr value; |
| 987 | |
| 988 | CUR_PTR = buffer; |
| 989 | prefix = xmlXPathParseNCName(ctxt); |
| 990 | if (prefix == NULL) { |
| 991 | xmlFree(buffer); |
| 992 | xmlFree(name); |
| 993 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 994 | } |
| 995 | SKIP_BLANKS; |
| 996 | if (CUR != '=') { |
| 997 | xmlFree(prefix); |
| 998 | xmlFree(buffer); |
| 999 | xmlFree(name); |
| 1000 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 1001 | } |
| 1002 | NEXT; |
| 1003 | SKIP_BLANKS; |
| 1004 | /* @@ check escaping in the XPointer WD */ |
| 1005 | |
| 1006 | value = xmlParseURI((const char *)ctxt->cur); |
| 1007 | if (value == NULL) { |
| 1008 | xmlFree(prefix); |
| 1009 | xmlFree(buffer); |
| 1010 | xmlFree(name); |
| 1011 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 1012 | } |
| 1013 | URI = xmlSaveUri(value); |
| 1014 | xmlFreeURI(value); |
| 1015 | if (URI == NULL) { |
| 1016 | xmlFree(prefix); |
| 1017 | xmlFree(buffer); |
| 1018 | xmlFree(name); |
| 1019 | XP_ERROR(XPATH_MEMORY_ERROR); |
| 1020 | } |
| 1021 | |
| 1022 | xmlXPathRegisterNs(ctxt->context, prefix, URI); |
| 1023 | CUR_PTR = left; |
| 1024 | #endif /* XPTR_XMLNS_SCHEME */ |
| 1025 | } else { |
| 1026 | xmlGenericError(xmlGenericErrorContext, |
| 1027 | "unsupported scheme '%s'\n", name); |
| 1028 | } |
| 1029 | xmlFree(buffer); |
| 1030 | xmlFree(name); |
| 1031 | } |
| 1032 | |
| 1033 | /** |
| 1034 | * xmlXPtrEvalFullXPtr: |
| 1035 | * @ctxt: the XPointer Parser context |
| 1036 | * @name: the preparsed Scheme for the first XPtrPart |
| 1037 | * |
| 1038 | * FullXPtr ::= XPtrPart (S? XPtrPart)* |
| 1039 | * |
| 1040 | * As the specs says: |
| 1041 | * ----------- |
| 1042 | * When multiple XPtrParts are provided, they must be evaluated in |
| 1043 | * left-to-right order. If evaluation of one part fails, the nexti |
| 1044 | * is evaluated. The following conditions cause XPointer part failure: |
| 1045 | * |
| 1046 | * - An unknown scheme |
| 1047 | * - A scheme that does not locate any sub-resource present in the resource |
| 1048 | * - A scheme that is not applicable to the media type of the resource |
| 1049 | * |
| 1050 | * The XPointer application must consume a failed XPointer part and |
| 1051 | * attempt to evaluate the next one, if any. The result of the first |
| 1052 | * XPointer part whose evaluation succeeds is taken to be the fragment |
| 1053 | * located by the XPointer as a whole. If all the parts fail, the result |
| 1054 | * for the XPointer as a whole is a sub-resource error. |
| 1055 | * ----------- |
| 1056 | * |
| 1057 | * Parse and evaluate a Full XPtr i.e. possibly a cascade of XPath based |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 1058 | * expressions or other schemes. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1059 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1060 | static void |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1061 | xmlXPtrEvalFullXPtr(xmlXPathParserContextPtr ctxt, xmlChar *name) { |
| 1062 | if (name == NULL) |
| 1063 | name = xmlXPathParseName(ctxt); |
| 1064 | if (name == NULL) |
| 1065 | XP_ERROR(XPATH_EXPR_ERROR); |
| 1066 | while (name != NULL) { |
| 1067 | xmlXPtrEvalXPtrPart(ctxt, name); |
| 1068 | |
| 1069 | /* in case of syntax error, break here */ |
| 1070 | if (ctxt->error != XPATH_EXPRESSION_OK) |
| 1071 | return; |
| 1072 | |
| 1073 | /* |
| 1074 | * If the returned value is a non-empty nodeset |
| 1075 | * or location set, return here. |
| 1076 | */ |
| 1077 | if (ctxt->value != NULL) { |
| 1078 | xmlXPathObjectPtr obj = ctxt->value; |
| 1079 | |
| 1080 | switch (obj->type) { |
| 1081 | case XPATH_LOCATIONSET: { |
| 1082 | xmlLocationSetPtr loc = ctxt->value->user; |
| 1083 | if ((loc != NULL) && (loc->locNr > 0)) |
| 1084 | return; |
| 1085 | break; |
| 1086 | } |
| 1087 | case XPATH_NODESET: { |
| 1088 | xmlNodeSetPtr loc = ctxt->value->nodesetval; |
| 1089 | if ((loc != NULL) && (loc->nodeNr > 0)) |
| 1090 | return; |
| 1091 | break; |
| 1092 | } |
| 1093 | default: |
| 1094 | break; |
| 1095 | } |
| 1096 | |
| 1097 | /* |
| 1098 | * Evaluating to improper values is equivalent to |
| 1099 | * a sub-resource error, clean-up the stack |
| 1100 | */ |
| 1101 | do { |
| 1102 | obj = valuePop(ctxt); |
| 1103 | if (obj != NULL) { |
| 1104 | xmlXPathFreeObject(obj); |
| 1105 | } |
| 1106 | } while (obj != NULL); |
| 1107 | } |
| 1108 | |
| 1109 | /* |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 1110 | * Is there another XPointer part. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1111 | */ |
| 1112 | SKIP_BLANKS; |
| 1113 | name = xmlXPathParseName(ctxt); |
| 1114 | } |
| 1115 | } |
| 1116 | |
| 1117 | /** |
| 1118 | * xmlXPtrEvalChildSeq: |
| 1119 | * @ctxt: the XPointer Parser context |
| 1120 | * @name: a possible ID name of the child sequence |
| 1121 | * |
| 1122 | * ChildSeq ::= '/1' ('/' [0-9]*)* |
| 1123 | * | Name ('/' [0-9]*)+ |
| 1124 | * |
| 1125 | * Parse and evaluate a Child Sequence. This routine also handle the |
| 1126 | * case of a Bare Name used to get a document ID. |
| 1127 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1128 | static void |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1129 | xmlXPtrEvalChildSeq(xmlXPathParserContextPtr ctxt, xmlChar *name) { |
| 1130 | /* |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 1131 | * XPointer don't allow by syntax to address in mutirooted trees |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1132 | * this might prove useful in some cases, warn about it. |
| 1133 | */ |
| 1134 | if ((name == NULL) && (CUR == '/') && (NXT(1) != '1')) { |
| 1135 | xmlGenericError(xmlGenericErrorContext, |
| 1136 | "warning: ChildSeq not starting by /1\n"); |
| 1137 | } |
| 1138 | |
| 1139 | if (name != NULL) { |
| 1140 | valuePush(ctxt, xmlXPathNewString(name)); |
| 1141 | xmlFree(name); |
| 1142 | xmlXPathIdFunction(ctxt, 1); |
| 1143 | CHECK_ERROR; |
| 1144 | } |
| 1145 | |
| 1146 | while (CUR == '/') { |
| 1147 | int child = 0; |
| 1148 | NEXT; |
| 1149 | |
| 1150 | while ((CUR >= '0') && (CUR <= '9')) { |
| 1151 | child = child * 10 + (CUR - '0'); |
| 1152 | NEXT; |
| 1153 | } |
| 1154 | xmlXPtrGetChildNo(ctxt, child); |
| 1155 | } |
| 1156 | } |
| 1157 | |
| 1158 | |
| 1159 | /** |
| 1160 | * xmlXPtrEvalXPointer: |
| 1161 | * @ctxt: the XPointer Parser context |
| 1162 | * |
| 1163 | * XPointer ::= Name |
| 1164 | * | ChildSeq |
| 1165 | * | FullXPtr |
| 1166 | * |
| 1167 | * Parse and evaluate an XPointer |
| 1168 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1169 | static void |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1170 | xmlXPtrEvalXPointer(xmlXPathParserContextPtr ctxt) { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 1171 | if (ctxt->valueTab == NULL) { |
| 1172 | /* Allocate the value stack */ |
| 1173 | ctxt->valueTab = (xmlXPathObjectPtr *) |
| 1174 | xmlMalloc(10 * sizeof(xmlXPathObjectPtr)); |
| 1175 | if (ctxt->valueTab == NULL) { |
| 1176 | xmlFree(ctxt); |
| 1177 | xmlGenericError(xmlGenericErrorContext, |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 1178 | "xmlXPathEvalXPointer: out of memory\n"); |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 1179 | return; |
| 1180 | } |
| 1181 | ctxt->valueNr = 0; |
| 1182 | ctxt->valueMax = 10; |
| 1183 | ctxt->value = NULL; |
| 1184 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1185 | SKIP_BLANKS; |
| 1186 | if (CUR == '/') { |
| 1187 | xmlXPathRoot(ctxt); |
| 1188 | xmlXPtrEvalChildSeq(ctxt, NULL); |
| 1189 | } else { |
| 1190 | xmlChar *name; |
| 1191 | |
| 1192 | name = xmlXPathParseName(ctxt); |
| 1193 | if (name == NULL) |
| 1194 | XP_ERROR(XPATH_EXPR_ERROR); |
| 1195 | if (CUR == '(') { |
| 1196 | xmlXPtrEvalFullXPtr(ctxt, name); |
| 1197 | /* Short evaluation */ |
| 1198 | return; |
| 1199 | } else { |
| 1200 | /* this handle both Bare Names and Child Sequences */ |
| 1201 | xmlXPtrEvalChildSeq(ctxt, name); |
| 1202 | } |
| 1203 | } |
| 1204 | SKIP_BLANKS; |
| 1205 | if (CUR != 0) |
| 1206 | XP_ERROR(XPATH_EXPR_ERROR); |
| 1207 | } |
| 1208 | |
| 1209 | |
| 1210 | /************************************************************************ |
| 1211 | * * |
| 1212 | * General routines * |
| 1213 | * * |
| 1214 | ************************************************************************/ |
| 1215 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1216 | void xmlXPtrStringRangeFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 1217 | void xmlXPtrStartPointFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 1218 | void xmlXPtrEndPointFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 1219 | void xmlXPtrHereFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 1220 | void xmlXPtrOriginFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 1221 | void xmlXPtrRangeInsideFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 1222 | void xmlXPtrRangeFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 1223 | |
| 1224 | /** |
| 1225 | * xmlXPtrNewContext: |
| 1226 | * @doc: the XML document |
| 1227 | * @here: the node that directly contains the XPointer being evaluated or NULL |
| 1228 | * @origin: the element from which a user or program initiated traversal of |
| 1229 | * the link, or NULL. |
| 1230 | * |
| 1231 | * Create a new XPointer context |
| 1232 | * |
| 1233 | * Returns the xmlXPathContext just allocated. |
| 1234 | */ |
| 1235 | xmlXPathContextPtr |
| 1236 | xmlXPtrNewContext(xmlDocPtr doc, xmlNodePtr here, xmlNodePtr origin) { |
| 1237 | xmlXPathContextPtr ret; |
| 1238 | |
| 1239 | ret = xmlXPathNewContext(doc); |
| 1240 | if (ret == NULL) |
| 1241 | return(ret); |
| 1242 | ret->xptr = 1; |
| 1243 | ret->here = here; |
| 1244 | ret->origin = origin; |
| 1245 | |
| 1246 | xmlXPathRegisterFunc(ret, (xmlChar *)"range-to", |
| 1247 | xmlXPtrRangeToFunction); |
| 1248 | xmlXPathRegisterFunc(ret, (xmlChar *)"range", |
| 1249 | xmlXPtrRangeFunction); |
| 1250 | xmlXPathRegisterFunc(ret, (xmlChar *)"range-inside", |
| 1251 | xmlXPtrRangeInsideFunction); |
| 1252 | xmlXPathRegisterFunc(ret, (xmlChar *)"string-range", |
| 1253 | xmlXPtrStringRangeFunction); |
| 1254 | xmlXPathRegisterFunc(ret, (xmlChar *)"start-point", |
| 1255 | xmlXPtrStartPointFunction); |
| 1256 | xmlXPathRegisterFunc(ret, (xmlChar *)"end-point", |
| 1257 | xmlXPtrEndPointFunction); |
| 1258 | xmlXPathRegisterFunc(ret, (xmlChar *)"here", |
| 1259 | xmlXPtrHereFunction); |
| 1260 | xmlXPathRegisterFunc(ret, (xmlChar *)" origin", |
| 1261 | xmlXPtrOriginFunction); |
| 1262 | |
| 1263 | return(ret); |
| 1264 | } |
| 1265 | |
| 1266 | /** |
| 1267 | * xmlXPtrEval: |
| 1268 | * @str: the XPointer expression |
| 1269 | * @ctx: the XPointer context |
| 1270 | * |
| 1271 | * Evaluate the XPath Location Path in the given context. |
| 1272 | * |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 1273 | * Returns the xmlXPathObjectPtr resulting from the evaluation or NULL. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1274 | * the caller has to free the object. |
| 1275 | */ |
| 1276 | xmlXPathObjectPtr |
| 1277 | xmlXPtrEval(const xmlChar *str, xmlXPathContextPtr ctx) { |
| 1278 | xmlXPathParserContextPtr ctxt; |
| 1279 | xmlXPathObjectPtr res = NULL, tmp; |
| 1280 | xmlXPathObjectPtr init = NULL; |
| 1281 | int stack = 0; |
| 1282 | |
| 1283 | xmlXPathInit(); |
| 1284 | |
| 1285 | if ((ctx == NULL) || (str == NULL)) |
| 1286 | return(NULL); |
| 1287 | |
| 1288 | ctxt = xmlXPathNewParserContext(str, ctx); |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 1289 | ctxt->xptr = 1; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1290 | xmlXPtrEvalXPointer(ctxt); |
| 1291 | |
| 1292 | if ((ctxt->value != NULL) && |
| 1293 | (ctxt->value->type != XPATH_NODESET) && |
| 1294 | (ctxt->value->type != XPATH_LOCATIONSET)) { |
| 1295 | xmlGenericError(xmlGenericErrorContext, |
| 1296 | "xmlXPtrEval: evaluation failed to return a node set\n"); |
| 1297 | } else { |
| 1298 | res = valuePop(ctxt); |
| 1299 | } |
| 1300 | |
| 1301 | do { |
| 1302 | tmp = valuePop(ctxt); |
| 1303 | if (tmp != NULL) { |
| 1304 | if (tmp != init) { |
| 1305 | if (tmp->type == XPATH_NODESET) { |
| 1306 | /* |
| 1307 | * Evaluation may push a root nodeset which is unused |
| 1308 | */ |
| 1309 | xmlNodeSetPtr set; |
| 1310 | set = tmp->nodesetval; |
| 1311 | if ((set->nodeNr != 1) || |
| 1312 | (set->nodeTab[0] != (xmlNodePtr) ctx->doc)) |
| 1313 | stack++; |
| 1314 | } else |
| 1315 | stack++; |
| 1316 | } |
| 1317 | xmlXPathFreeObject(tmp); |
| 1318 | } |
| 1319 | } while (tmp != NULL); |
| 1320 | if (stack != 0) { |
| 1321 | xmlGenericError(xmlGenericErrorContext, |
| 1322 | "xmlXPtrEval: %d object left on the stack\n", |
| 1323 | stack); |
| 1324 | } |
| 1325 | if (ctxt->error != XPATH_EXPRESSION_OK) { |
| 1326 | xmlXPathFreeObject(res); |
| 1327 | res = NULL; |
| 1328 | } |
| 1329 | |
| 1330 | xmlXPathFreeParserContext(ctxt); |
| 1331 | return(res); |
| 1332 | } |
| 1333 | |
| 1334 | /** |
| 1335 | * xmlXPtrBuildRangeNodeList: |
| 1336 | * @range: a range object |
| 1337 | * |
| 1338 | * Build a node list tree copy of the range |
| 1339 | * |
| 1340 | * Returns an xmlNodePtr list or NULL. |
| 1341 | * the caller has to free the node tree. |
| 1342 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1343 | static xmlNodePtr |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1344 | xmlXPtrBuildRangeNodeList(xmlXPathObjectPtr range) { |
| 1345 | /* pointers to generated nodes */ |
| 1346 | xmlNodePtr list = NULL, last = NULL, parent = NULL, tmp; |
| 1347 | /* pointers to traversal nodes */ |
| 1348 | xmlNodePtr start, cur, end; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1349 | int index1, index2; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1350 | |
| 1351 | if (range == NULL) |
| 1352 | return(NULL); |
| 1353 | if (range->type != XPATH_RANGE) |
| 1354 | return(NULL); |
| 1355 | start = (xmlNodePtr) range->user; |
| 1356 | |
| 1357 | if (start == NULL) |
| 1358 | return(NULL); |
| 1359 | end = range->user2; |
| 1360 | if (end == NULL) |
| 1361 | return(xmlCopyNode(start, 1)); |
| 1362 | |
| 1363 | cur = start; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1364 | index1 = range->index; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1365 | index2 = range->index2; |
| 1366 | while (cur != NULL) { |
| 1367 | if (cur == end) { |
| 1368 | if (cur->type == XML_TEXT_NODE) { |
| 1369 | const xmlChar *content = cur->content; |
| 1370 | int len; |
| 1371 | |
| 1372 | if (content == NULL) { |
| 1373 | tmp = xmlNewTextLen(NULL, 0); |
| 1374 | } else { |
| 1375 | len = index2; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1376 | if ((cur == start) && (index1 > 1)) { |
| 1377 | content += (index1 - 1); |
| 1378 | len -= (index1 - 1); |
| 1379 | index1 = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1380 | } else { |
| 1381 | len = index2; |
| 1382 | } |
| 1383 | tmp = xmlNewTextLen(content, len); |
| 1384 | } |
| 1385 | /* single sub text node selection */ |
| 1386 | if (list == NULL) |
| 1387 | return(tmp); |
| 1388 | /* prune and return full set */ |
| 1389 | if (last != NULL) |
| 1390 | xmlAddNextSibling(last, tmp); |
| 1391 | else |
| 1392 | xmlAddChild(parent, tmp); |
| 1393 | return(list); |
| 1394 | } else { |
| 1395 | tmp = xmlCopyNode(cur, 0); |
| 1396 | if (list == NULL) |
| 1397 | list = tmp; |
| 1398 | else { |
| 1399 | if (last != NULL) |
| 1400 | xmlAddNextSibling(last, tmp); |
| 1401 | else |
| 1402 | xmlAddChild(parent, tmp); |
| 1403 | } |
| 1404 | last = NULL; |
| 1405 | parent = tmp; |
| 1406 | |
| 1407 | if (index2 > 1) { |
| 1408 | end = xmlXPtrGetNthChild(cur, index2 - 1); |
| 1409 | index2 = 0; |
| 1410 | } |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1411 | if ((cur == start) && (index1 > 1)) { |
| 1412 | cur = xmlXPtrGetNthChild(cur, index1 - 1); |
| 1413 | index1 = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1414 | } else { |
| 1415 | cur = cur->children; |
| 1416 | } |
| 1417 | /* |
| 1418 | * Now gather the remaining nodes from cur to end |
| 1419 | */ |
| 1420 | continue; /* while */ |
| 1421 | } |
| 1422 | } else if ((cur == start) && |
| 1423 | (list == NULL) /* looks superfluous but ... */ ) { |
Daniel Veillard | 7db3773 | 2001-07-12 01:20:08 +0000 | [diff] [blame] | 1424 | if ((cur->type == XML_TEXT_NODE) || |
| 1425 | (cur->type == XML_CDATA_SECTION_NODE)) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1426 | const xmlChar *content = cur->content; |
| 1427 | |
| 1428 | if (content == NULL) { |
| 1429 | tmp = xmlNewTextLen(NULL, 0); |
| 1430 | } else { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1431 | if (index1 > 1) { |
| 1432 | content += (index1 - 1); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1433 | } |
| 1434 | tmp = xmlNewText(content); |
| 1435 | } |
| 1436 | last = list = tmp; |
| 1437 | } else { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1438 | if ((cur == start) && (index1 > 1)) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1439 | tmp = xmlCopyNode(cur, 0); |
| 1440 | list = tmp; |
| 1441 | parent = tmp; |
| 1442 | last = NULL; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1443 | cur = xmlXPtrGetNthChild(cur, index1 - 1); |
| 1444 | index1 = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1445 | /* |
| 1446 | * Now gather the remaining nodes from cur to end |
| 1447 | */ |
| 1448 | continue; /* while */ |
| 1449 | } |
| 1450 | tmp = xmlCopyNode(cur, 1); |
| 1451 | list = tmp; |
| 1452 | parent = NULL; |
| 1453 | last = tmp; |
| 1454 | } |
| 1455 | } else { |
| 1456 | tmp = NULL; |
| 1457 | switch (cur->type) { |
| 1458 | case XML_DTD_NODE: |
| 1459 | case XML_ELEMENT_DECL: |
| 1460 | case XML_ATTRIBUTE_DECL: |
| 1461 | case XML_ENTITY_NODE: |
| 1462 | /* Do not copy DTD informations */ |
| 1463 | break; |
| 1464 | case XML_ENTITY_DECL: |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 1465 | TODO /* handle crossing entities -> stack needed */ |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1466 | break; |
| 1467 | case XML_XINCLUDE_START: |
| 1468 | case XML_XINCLUDE_END: |
| 1469 | /* don't consider it part of the tree content */ |
| 1470 | break; |
| 1471 | case XML_ATTRIBUTE_NODE: |
| 1472 | /* Humm, should not happen ! */ |
| 1473 | STRANGE |
| 1474 | break; |
| 1475 | default: |
| 1476 | tmp = xmlCopyNode(cur, 1); |
| 1477 | break; |
| 1478 | } |
| 1479 | if (tmp != NULL) { |
| 1480 | if ((list == NULL) || ((last == NULL) && (parent == NULL))) { |
| 1481 | STRANGE |
| 1482 | return(NULL); |
| 1483 | } |
| 1484 | if (last != NULL) |
| 1485 | xmlAddNextSibling(last, tmp); |
| 1486 | else { |
| 1487 | xmlAddChild(parent, tmp); |
| 1488 | last = tmp; |
| 1489 | } |
| 1490 | } |
| 1491 | } |
| 1492 | /* |
| 1493 | * Skip to next node in document order |
| 1494 | */ |
| 1495 | if ((list == NULL) || ((last == NULL) && (parent == NULL))) { |
| 1496 | STRANGE |
| 1497 | return(NULL); |
| 1498 | } |
| 1499 | cur = xmlXPtrAdvanceNode(cur); |
| 1500 | } |
| 1501 | return(list); |
| 1502 | } |
| 1503 | |
| 1504 | /** |
| 1505 | * xmlXPtrBuildNodeList: |
| 1506 | * @obj: the XPointer result from the evaluation. |
| 1507 | * |
| 1508 | * Build a node list tree copy of the XPointer result. |
Daniel Veillard | 39196eb | 2001-06-19 18:09:42 +0000 | [diff] [blame] | 1509 | * This will drop Attributes and Namespace declarations. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1510 | * |
| 1511 | * Returns an xmlNodePtr list or NULL. |
| 1512 | * the caller has to free the node tree. |
| 1513 | */ |
| 1514 | xmlNodePtr |
| 1515 | xmlXPtrBuildNodeList(xmlXPathObjectPtr obj) { |
| 1516 | xmlNodePtr list = NULL, last = NULL; |
| 1517 | int i; |
| 1518 | |
| 1519 | if (obj == NULL) |
| 1520 | return(NULL); |
| 1521 | switch (obj->type) { |
| 1522 | case XPATH_NODESET: { |
| 1523 | xmlNodeSetPtr set = obj->nodesetval; |
| 1524 | if (set == NULL) |
| 1525 | return(NULL); |
| 1526 | for (i = 0;i < set->nodeNr;i++) { |
Daniel Veillard | 39196eb | 2001-06-19 18:09:42 +0000 | [diff] [blame] | 1527 | if (set->nodeTab[i] == NULL) |
| 1528 | continue; |
| 1529 | switch (set->nodeTab[i]->type) { |
| 1530 | case XML_TEXT_NODE: |
| 1531 | case XML_CDATA_SECTION_NODE: |
| 1532 | case XML_ELEMENT_NODE: |
| 1533 | case XML_ENTITY_REF_NODE: |
| 1534 | case XML_ENTITY_NODE: |
| 1535 | case XML_PI_NODE: |
| 1536 | case XML_COMMENT_NODE: |
| 1537 | case XML_DOCUMENT_NODE: |
| 1538 | case XML_HTML_DOCUMENT_NODE: |
| 1539 | #ifdef LIBXML_DOCB_ENABLED |
| 1540 | case XML_DOCB_DOCUMENT_NODE: |
| 1541 | #endif |
| 1542 | case XML_XINCLUDE_START: |
| 1543 | case XML_XINCLUDE_END: |
| 1544 | break; |
| 1545 | case XML_ATTRIBUTE_NODE: |
| 1546 | case XML_NAMESPACE_DECL: |
| 1547 | case XML_DOCUMENT_TYPE_NODE: |
| 1548 | case XML_DOCUMENT_FRAG_NODE: |
| 1549 | case XML_NOTATION_NODE: |
| 1550 | case XML_DTD_NODE: |
| 1551 | case XML_ELEMENT_DECL: |
| 1552 | case XML_ATTRIBUTE_DECL: |
| 1553 | case XML_ENTITY_DECL: |
| 1554 | continue; /* for */ |
| 1555 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1556 | if (last == NULL) |
| 1557 | list = last = xmlCopyNode(set->nodeTab[i], 1); |
| 1558 | else { |
| 1559 | xmlAddNextSibling(last, xmlCopyNode(set->nodeTab[i], 1)); |
| 1560 | if (last->next != NULL) |
| 1561 | last = last->next; |
| 1562 | } |
| 1563 | } |
| 1564 | break; |
| 1565 | } |
| 1566 | case XPATH_LOCATIONSET: { |
| 1567 | xmlLocationSetPtr set = (xmlLocationSetPtr) obj->user; |
| 1568 | if (set == NULL) |
| 1569 | return(NULL); |
| 1570 | for (i = 0;i < set->locNr;i++) { |
| 1571 | if (last == NULL) |
| 1572 | list = last = xmlXPtrBuildNodeList(set->locTab[i]); |
| 1573 | else |
| 1574 | xmlAddNextSibling(last, |
| 1575 | xmlXPtrBuildNodeList(set->locTab[i])); |
| 1576 | if (last != NULL) { |
| 1577 | while (last->next != NULL) |
| 1578 | last = last->next; |
| 1579 | } |
| 1580 | } |
| 1581 | break; |
| 1582 | } |
| 1583 | case XPATH_RANGE: |
| 1584 | return(xmlXPtrBuildRangeNodeList(obj)); |
| 1585 | case XPATH_POINT: |
| 1586 | return(xmlCopyNode(obj->user, 0)); |
| 1587 | default: |
| 1588 | break; |
| 1589 | } |
| 1590 | return(list); |
| 1591 | } |
| 1592 | |
| 1593 | /************************************************************************ |
| 1594 | * * |
| 1595 | * XPointer functions * |
| 1596 | * * |
| 1597 | ************************************************************************/ |
| 1598 | |
| 1599 | /** |
| 1600 | * xmlXPtrNbLocChildren: |
| 1601 | * @node: an xmlNodePtr |
| 1602 | * |
Daniel Veillard | 60087f3 | 2001-10-10 09:45:09 +0000 | [diff] [blame] | 1603 | * Count the number of location children of @node or the length of the |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1604 | * string value in case of text/PI/Comments nodes |
| 1605 | * |
| 1606 | * Returns the number of location children |
| 1607 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1608 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1609 | xmlXPtrNbLocChildren(xmlNodePtr node) { |
| 1610 | int ret = 0; |
| 1611 | if (node == NULL) |
| 1612 | return(-1); |
| 1613 | switch (node->type) { |
| 1614 | case XML_HTML_DOCUMENT_NODE: |
| 1615 | case XML_DOCUMENT_NODE: |
| 1616 | case XML_ELEMENT_NODE: |
| 1617 | node = node->children; |
| 1618 | while (node != NULL) { |
| 1619 | if (node->type == XML_ELEMENT_NODE) |
| 1620 | ret++; |
| 1621 | node = node->next; |
| 1622 | } |
| 1623 | break; |
| 1624 | case XML_ATTRIBUTE_NODE: |
| 1625 | return(-1); |
| 1626 | |
| 1627 | case XML_PI_NODE: |
| 1628 | case XML_COMMENT_NODE: |
| 1629 | case XML_TEXT_NODE: |
| 1630 | case XML_CDATA_SECTION_NODE: |
| 1631 | case XML_ENTITY_REF_NODE: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1632 | ret = xmlStrlen(node->content); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1633 | break; |
| 1634 | default: |
| 1635 | return(-1); |
| 1636 | } |
| 1637 | return(ret); |
| 1638 | } |
| 1639 | |
| 1640 | /** |
| 1641 | * xmlXPtrHereFunction: |
| 1642 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1643 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1644 | * |
| 1645 | * Function implementing here() operation |
| 1646 | * as described in 5.4.3 |
| 1647 | */ |
| 1648 | void |
| 1649 | xmlXPtrHereFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1650 | CHECK_ARITY(0); |
| 1651 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1652 | if (ctxt->context->here == NULL) |
| 1653 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 1654 | |
| 1655 | valuePush(ctxt, xmlXPtrNewLocationSetNodes(ctxt->context->here, NULL)); |
| 1656 | } |
| 1657 | |
| 1658 | /** |
| 1659 | * xmlXPtrOriginFunction: |
| 1660 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1661 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1662 | * |
| 1663 | * Function implementing origin() operation |
| 1664 | * as described in 5.4.3 |
| 1665 | */ |
| 1666 | void |
| 1667 | xmlXPtrOriginFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1668 | CHECK_ARITY(0); |
| 1669 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1670 | if (ctxt->context->origin == NULL) |
| 1671 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 1672 | |
| 1673 | valuePush(ctxt, xmlXPtrNewLocationSetNodes(ctxt->context->origin, NULL)); |
| 1674 | } |
| 1675 | |
| 1676 | /** |
| 1677 | * xmlXPtrStartPointFunction: |
| 1678 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1679 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1680 | * |
| 1681 | * Function implementing start-point() operation |
| 1682 | * as described in 5.4.3 |
| 1683 | * ---------------- |
| 1684 | * location-set start-point(location-set) |
| 1685 | * |
| 1686 | * For each location x in the argument location-set, start-point adds a |
| 1687 | * location of type point to the result location-set. That point represents |
| 1688 | * the start point of location x and is determined by the following rules: |
| 1689 | * |
| 1690 | * - If x is of type point, the start point is x. |
| 1691 | * - If x is of type range, the start point is the start point of x. |
| 1692 | * - If x is of type root, element, text, comment, or processing instruction, |
| 1693 | * - the container node of the start point is x and the index is 0. |
| 1694 | * - If x is of type attribute or namespace, the function must signal a |
| 1695 | * syntax error. |
| 1696 | * ---------------- |
| 1697 | * |
| 1698 | */ |
| 1699 | void |
| 1700 | xmlXPtrStartPointFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 1701 | xmlXPathObjectPtr tmp, obj, point; |
| 1702 | xmlLocationSetPtr newset = NULL; |
| 1703 | xmlLocationSetPtr oldset = NULL; |
| 1704 | |
| 1705 | CHECK_ARITY(1); |
| 1706 | if ((ctxt->value == NULL) || |
| 1707 | ((ctxt->value->type != XPATH_LOCATIONSET) && |
| 1708 | (ctxt->value->type != XPATH_NODESET))) |
| 1709 | XP_ERROR(XPATH_INVALID_TYPE) |
| 1710 | |
| 1711 | obj = valuePop(ctxt); |
| 1712 | if (obj->type == XPATH_NODESET) { |
| 1713 | /* |
| 1714 | * First convert to a location set |
| 1715 | */ |
| 1716 | tmp = xmlXPtrNewLocationSetNodeSet(obj->nodesetval); |
| 1717 | xmlXPathFreeObject(obj); |
| 1718 | obj = tmp; |
| 1719 | } |
| 1720 | |
| 1721 | newset = xmlXPtrLocationSetCreate(NULL); |
| 1722 | if (newset == NULL) { |
| 1723 | xmlXPathFreeObject(obj); |
| 1724 | XP_ERROR(XPATH_MEMORY_ERROR); |
| 1725 | } |
| 1726 | oldset = (xmlLocationSetPtr) obj->user; |
| 1727 | if (oldset != NULL) { |
| 1728 | int i; |
| 1729 | |
| 1730 | for (i = 0; i < oldset->locNr; i++) { |
| 1731 | tmp = oldset->locTab[i]; |
| 1732 | if (tmp == NULL) |
| 1733 | continue; |
| 1734 | point = NULL; |
| 1735 | switch (tmp->type) { |
| 1736 | case XPATH_POINT: |
| 1737 | point = xmlXPtrNewPoint(tmp->user, tmp->index); |
| 1738 | break; |
| 1739 | case XPATH_RANGE: { |
| 1740 | xmlNodePtr node = tmp->user; |
| 1741 | if (node != NULL) { |
| 1742 | if (node->type == XML_ATTRIBUTE_NODE) { |
| 1743 | /* TODO: Namespace Nodes ??? */ |
| 1744 | xmlXPathFreeObject(obj); |
| 1745 | xmlXPtrFreeLocationSet(newset); |
| 1746 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 1747 | } |
| 1748 | point = xmlXPtrNewPoint(node, tmp->index); |
| 1749 | } |
| 1750 | break; |
| 1751 | } |
| 1752 | default: |
| 1753 | /*** Should we raise an error ? |
| 1754 | xmlXPathFreeObject(obj); |
| 1755 | xmlXPathFreeObject(newset); |
| 1756 | XP_ERROR(XPATH_INVALID_TYPE) |
| 1757 | ***/ |
| 1758 | break; |
| 1759 | } |
| 1760 | if (point != NULL) |
| 1761 | xmlXPtrLocationSetAdd(newset, point); |
| 1762 | } |
| 1763 | } |
| 1764 | xmlXPathFreeObject(obj); |
| 1765 | valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); |
| 1766 | } |
| 1767 | |
| 1768 | /** |
| 1769 | * xmlXPtrEndPointFunction: |
| 1770 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1771 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1772 | * |
| 1773 | * Function implementing end-point() operation |
| 1774 | * as described in 5.4.3 |
| 1775 | * ---------------------------- |
| 1776 | * location-set end-point(location-set) |
| 1777 | * |
| 1778 | * For each location x in the argument location-set, end-point adds a |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 1779 | * location of type point to the result location-set. That point represents |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1780 | * the end point of location x and is determined by the following rules: |
| 1781 | * |
| 1782 | * - If x is of type point, the resulting point is x. |
| 1783 | * - If x is of type range, the resulting point is the end point of x. |
| 1784 | * - If x is of type root or element, the container node of the resulting |
| 1785 | * point is x and the index is the number of location children of x. |
| 1786 | * - If x is of type text, comment, or processing instruction, the container |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 1787 | * node of the resulting point is x and the index is the length of the |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1788 | * string-value of x. |
| 1789 | * - If x is of type attribute or namespace, the function must signal a |
| 1790 | * syntax error. |
| 1791 | * ---------------------------- |
| 1792 | */ |
| 1793 | void |
| 1794 | xmlXPtrEndPointFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 1795 | xmlXPathObjectPtr tmp, obj, point; |
| 1796 | xmlLocationSetPtr newset = NULL; |
| 1797 | xmlLocationSetPtr oldset = NULL; |
| 1798 | |
| 1799 | CHECK_ARITY(1); |
| 1800 | if ((ctxt->value == NULL) || |
| 1801 | ((ctxt->value->type != XPATH_LOCATIONSET) && |
| 1802 | (ctxt->value->type != XPATH_NODESET))) |
| 1803 | XP_ERROR(XPATH_INVALID_TYPE) |
| 1804 | |
| 1805 | obj = valuePop(ctxt); |
| 1806 | if (obj->type == XPATH_NODESET) { |
| 1807 | /* |
| 1808 | * First convert to a location set |
| 1809 | */ |
| 1810 | tmp = xmlXPtrNewLocationSetNodeSet(obj->nodesetval); |
| 1811 | xmlXPathFreeObject(obj); |
| 1812 | obj = tmp; |
| 1813 | } |
| 1814 | |
| 1815 | newset = xmlXPtrLocationSetCreate(NULL); |
| 1816 | oldset = (xmlLocationSetPtr) obj->user; |
| 1817 | if (oldset != NULL) { |
| 1818 | int i; |
| 1819 | |
| 1820 | for (i = 0; i < oldset->locNr; i++) { |
| 1821 | tmp = oldset->locTab[i]; |
| 1822 | if (tmp == NULL) |
| 1823 | continue; |
| 1824 | point = NULL; |
| 1825 | switch (tmp->type) { |
| 1826 | case XPATH_POINT: |
| 1827 | point = xmlXPtrNewPoint(tmp->user, tmp->index); |
| 1828 | break; |
| 1829 | case XPATH_RANGE: { |
| 1830 | xmlNodePtr node = tmp->user2; |
| 1831 | if (node != NULL) { |
| 1832 | if (node->type == XML_ATTRIBUTE_NODE) { |
| 1833 | /* TODO: Namespace Nodes ??? */ |
| 1834 | xmlXPathFreeObject(obj); |
| 1835 | xmlXPtrFreeLocationSet(newset); |
| 1836 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 1837 | } |
| 1838 | point = xmlXPtrNewPoint(node, tmp->index2); |
| 1839 | } else if (tmp->user == NULL) { |
| 1840 | point = xmlXPtrNewPoint(node, |
| 1841 | xmlXPtrNbLocChildren(node)); |
| 1842 | } |
| 1843 | break; |
| 1844 | } |
| 1845 | default: |
| 1846 | /*** Should we raise an error ? |
| 1847 | xmlXPathFreeObject(obj); |
| 1848 | xmlXPathFreeObject(newset); |
| 1849 | XP_ERROR(XPATH_INVALID_TYPE) |
| 1850 | ***/ |
| 1851 | break; |
| 1852 | } |
| 1853 | if (point != NULL) |
| 1854 | xmlXPtrLocationSetAdd(newset, point); |
| 1855 | } |
| 1856 | } |
| 1857 | xmlXPathFreeObject(obj); |
| 1858 | valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); |
| 1859 | } |
| 1860 | |
| 1861 | |
| 1862 | /** |
| 1863 | * xmlXPtrCoveringRange: |
| 1864 | * @ctxt: the XPointer Parser context |
| 1865 | * @loc: the location for which the covering range must be computed |
| 1866 | * |
| 1867 | * A covering range is a range that wholly encompasses a location |
| 1868 | * Section 5.3.3. Covering Ranges for All Location Types |
| 1869 | * http://www.w3.org/TR/xptr#N2267 |
| 1870 | * |
| 1871 | * Returns a new location or NULL in case of error |
| 1872 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1873 | static xmlXPathObjectPtr |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1874 | xmlXPtrCoveringRange(xmlXPathParserContextPtr ctxt, xmlXPathObjectPtr loc) { |
| 1875 | if (loc == NULL) |
| 1876 | return(NULL); |
| 1877 | if ((ctxt == NULL) || (ctxt->context == NULL) || |
| 1878 | (ctxt->context->doc == NULL)) |
| 1879 | return(NULL); |
| 1880 | switch (loc->type) { |
| 1881 | case XPATH_POINT: |
| 1882 | return(xmlXPtrNewRange(loc->user, loc->index, |
| 1883 | loc->user, loc->index)); |
| 1884 | case XPATH_RANGE: |
| 1885 | if (loc->user2 != NULL) { |
| 1886 | return(xmlXPtrNewRange(loc->user, loc->index, |
| 1887 | loc->user2, loc->index2)); |
| 1888 | } else { |
| 1889 | xmlNodePtr node = (xmlNodePtr) loc->user; |
| 1890 | if (node == (xmlNodePtr) ctxt->context->doc) { |
| 1891 | return(xmlXPtrNewRange(node, 0, node, |
| 1892 | xmlXPtrGetArity(node))); |
| 1893 | } else { |
| 1894 | switch (node->type) { |
| 1895 | case XML_ATTRIBUTE_NODE: |
| 1896 | /* !!! our model is slightly different than XPath */ |
| 1897 | return(xmlXPtrNewRange(node, 0, node, |
| 1898 | xmlXPtrGetArity(node))); |
| 1899 | case XML_ELEMENT_NODE: |
| 1900 | case XML_TEXT_NODE: |
| 1901 | case XML_CDATA_SECTION_NODE: |
| 1902 | case XML_ENTITY_REF_NODE: |
| 1903 | case XML_PI_NODE: |
| 1904 | case XML_COMMENT_NODE: |
| 1905 | case XML_DOCUMENT_NODE: |
| 1906 | case XML_NOTATION_NODE: |
| 1907 | case XML_HTML_DOCUMENT_NODE: { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1908 | int indx = xmlXPtrGetIndex(node); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1909 | |
| 1910 | node = node->parent; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1911 | return(xmlXPtrNewRange(node, indx - 1, |
| 1912 | node, indx + 1)); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1913 | } |
| 1914 | default: |
| 1915 | return(NULL); |
| 1916 | } |
| 1917 | } |
| 1918 | } |
| 1919 | default: |
| 1920 | TODO /* missed one case ??? */ |
| 1921 | } |
| 1922 | return(NULL); |
| 1923 | } |
| 1924 | |
| 1925 | /** |
| 1926 | * xmlXPtrRangeFunction: |
| 1927 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1928 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1929 | * |
| 1930 | * Function implementing the range() function 5.4.3 |
| 1931 | * location-set range(location-set ) |
| 1932 | * |
| 1933 | * The range function returns ranges covering the locations in |
| 1934 | * the argument location-set. For each location x in the argument |
| 1935 | * location-set, a range location representing the covering range of |
| 1936 | * x is added to the result location-set. |
| 1937 | */ |
| 1938 | void |
| 1939 | xmlXPtrRangeFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 1940 | int i; |
| 1941 | xmlXPathObjectPtr set; |
| 1942 | xmlLocationSetPtr oldset; |
| 1943 | xmlLocationSetPtr newset; |
| 1944 | |
| 1945 | CHECK_ARITY(1); |
| 1946 | if ((ctxt->value == NULL) || |
| 1947 | ((ctxt->value->type != XPATH_LOCATIONSET) && |
| 1948 | (ctxt->value->type != XPATH_NODESET))) |
| 1949 | XP_ERROR(XPATH_INVALID_TYPE) |
| 1950 | |
| 1951 | set = valuePop(ctxt); |
| 1952 | if (set->type == XPATH_NODESET) { |
| 1953 | xmlXPathObjectPtr tmp; |
| 1954 | |
| 1955 | /* |
| 1956 | * First convert to a location set |
| 1957 | */ |
| 1958 | tmp = xmlXPtrNewLocationSetNodeSet(set->nodesetval); |
| 1959 | xmlXPathFreeObject(set); |
| 1960 | set = tmp; |
| 1961 | } |
| 1962 | oldset = (xmlLocationSetPtr) set->user; |
| 1963 | |
| 1964 | /* |
| 1965 | * The loop is to compute the covering range for each item and add it |
| 1966 | */ |
| 1967 | newset = xmlXPtrLocationSetCreate(NULL); |
| 1968 | for (i = 0;i < oldset->locNr;i++) { |
| 1969 | xmlXPtrLocationSetAdd(newset, |
| 1970 | xmlXPtrCoveringRange(ctxt, oldset->locTab[i])); |
| 1971 | } |
| 1972 | |
| 1973 | /* |
| 1974 | * Save the new value and cleanup |
| 1975 | */ |
| 1976 | valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); |
| 1977 | xmlXPathFreeObject(set); |
| 1978 | } |
| 1979 | |
| 1980 | /** |
| 1981 | * xmlXPtrInsideRange: |
| 1982 | * @ctxt: the XPointer Parser context |
| 1983 | * @loc: the location for which the inside range must be computed |
| 1984 | * |
| 1985 | * A inside range is a range described in the range-inside() description |
| 1986 | * |
| 1987 | * Returns a new location or NULL in case of error |
| 1988 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1989 | static xmlXPathObjectPtr |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1990 | xmlXPtrInsideRange(xmlXPathParserContextPtr ctxt, xmlXPathObjectPtr loc) { |
| 1991 | if (loc == NULL) |
| 1992 | return(NULL); |
| 1993 | if ((ctxt == NULL) || (ctxt->context == NULL) || |
| 1994 | (ctxt->context->doc == NULL)) |
| 1995 | return(NULL); |
| 1996 | switch (loc->type) { |
| 1997 | case XPATH_POINT: { |
| 1998 | xmlNodePtr node = (xmlNodePtr) loc->user; |
| 1999 | switch (node->type) { |
| 2000 | case XML_PI_NODE: |
| 2001 | case XML_COMMENT_NODE: |
| 2002 | case XML_TEXT_NODE: |
| 2003 | case XML_CDATA_SECTION_NODE: { |
| 2004 | if (node->content == NULL) { |
| 2005 | return(xmlXPtrNewRange(node, 0, node, 0)); |
| 2006 | } else { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2007 | return(xmlXPtrNewRange(node, 0, node, |
| 2008 | xmlStrlen(node->content))); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2009 | } |
| 2010 | } |
| 2011 | case XML_ATTRIBUTE_NODE: |
| 2012 | case XML_ELEMENT_NODE: |
| 2013 | case XML_ENTITY_REF_NODE: |
| 2014 | case XML_DOCUMENT_NODE: |
| 2015 | case XML_NOTATION_NODE: |
| 2016 | case XML_HTML_DOCUMENT_NODE: { |
| 2017 | return(xmlXPtrNewRange(node, 0, node, |
| 2018 | xmlXPtrGetArity(node))); |
| 2019 | } |
| 2020 | default: |
Daniel Veillard | b44025c | 2001-10-11 22:55:55 +0000 | [diff] [blame] | 2021 | break; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2022 | } |
| 2023 | return(NULL); |
| 2024 | } |
| 2025 | case XPATH_RANGE: { |
| 2026 | xmlNodePtr node = (xmlNodePtr) loc->user; |
| 2027 | if (loc->user2 != NULL) { |
| 2028 | return(xmlXPtrNewRange(node, loc->index, |
| 2029 | loc->user2, loc->index2)); |
| 2030 | } else { |
| 2031 | switch (node->type) { |
| 2032 | case XML_PI_NODE: |
| 2033 | case XML_COMMENT_NODE: |
| 2034 | case XML_TEXT_NODE: |
| 2035 | case XML_CDATA_SECTION_NODE: { |
| 2036 | if (node->content == NULL) { |
| 2037 | return(xmlXPtrNewRange(node, 0, node, 0)); |
| 2038 | } else { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2039 | return(xmlXPtrNewRange(node, 0, node, |
| 2040 | xmlStrlen(node->content))); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2041 | } |
| 2042 | } |
| 2043 | case XML_ATTRIBUTE_NODE: |
| 2044 | case XML_ELEMENT_NODE: |
| 2045 | case XML_ENTITY_REF_NODE: |
| 2046 | case XML_DOCUMENT_NODE: |
| 2047 | case XML_NOTATION_NODE: |
| 2048 | case XML_HTML_DOCUMENT_NODE: { |
| 2049 | return(xmlXPtrNewRange(node, 0, node, |
| 2050 | xmlXPtrGetArity(node))); |
| 2051 | } |
| 2052 | default: |
Daniel Veillard | b44025c | 2001-10-11 22:55:55 +0000 | [diff] [blame] | 2053 | break; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2054 | } |
| 2055 | return(NULL); |
| 2056 | } |
| 2057 | } |
| 2058 | default: |
| 2059 | TODO /* missed one case ??? */ |
| 2060 | } |
| 2061 | return(NULL); |
| 2062 | } |
| 2063 | |
| 2064 | /** |
| 2065 | * xmlXPtrRangeInsideFunction: |
| 2066 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2067 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2068 | * |
| 2069 | * Function implementing the range-inside() function 5.4.3 |
| 2070 | * location-set range-inside(location-set ) |
| 2071 | * |
| 2072 | * The range-inside function returns ranges covering the contents of |
| 2073 | * the locations in the argument location-set. For each location x in |
| 2074 | * the argument location-set, a range location is added to the result |
| 2075 | * location-set. If x is a range location, then x is added to the |
| 2076 | * result location-set. If x is not a range location, then x is used |
| 2077 | * as the container location of the start and end points of the range |
| 2078 | * location to be added; the index of the start point of the range is |
| 2079 | * zero; if the end point is a character point then its index is the |
| 2080 | * length of the string-value of x, and otherwise is the number of |
| 2081 | * location children of x. |
| 2082 | * |
| 2083 | */ |
| 2084 | void |
| 2085 | xmlXPtrRangeInsideFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 2086 | int i; |
| 2087 | xmlXPathObjectPtr set; |
| 2088 | xmlLocationSetPtr oldset; |
| 2089 | xmlLocationSetPtr newset; |
| 2090 | |
| 2091 | CHECK_ARITY(1); |
| 2092 | if ((ctxt->value == NULL) || |
| 2093 | ((ctxt->value->type != XPATH_LOCATIONSET) && |
| 2094 | (ctxt->value->type != XPATH_NODESET))) |
| 2095 | XP_ERROR(XPATH_INVALID_TYPE) |
| 2096 | |
| 2097 | set = valuePop(ctxt); |
| 2098 | if (set->type == XPATH_NODESET) { |
| 2099 | xmlXPathObjectPtr tmp; |
| 2100 | |
| 2101 | /* |
| 2102 | * First convert to a location set |
| 2103 | */ |
| 2104 | tmp = xmlXPtrNewLocationSetNodeSet(set->nodesetval); |
| 2105 | xmlXPathFreeObject(set); |
| 2106 | set = tmp; |
| 2107 | } |
| 2108 | oldset = (xmlLocationSetPtr) set->user; |
| 2109 | |
| 2110 | /* |
| 2111 | * The loop is to compute the covering range for each item and add it |
| 2112 | */ |
| 2113 | newset = xmlXPtrLocationSetCreate(NULL); |
| 2114 | for (i = 0;i < oldset->locNr;i++) { |
| 2115 | xmlXPtrLocationSetAdd(newset, |
| 2116 | xmlXPtrInsideRange(ctxt, oldset->locTab[i])); |
| 2117 | } |
| 2118 | |
| 2119 | /* |
| 2120 | * Save the new value and cleanup |
| 2121 | */ |
| 2122 | valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); |
| 2123 | xmlXPathFreeObject(set); |
| 2124 | } |
| 2125 | |
| 2126 | /** |
| 2127 | * xmlXPtrRangeToFunction: |
| 2128 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2129 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2130 | * |
| 2131 | * Implement the range-to() XPointer function |
| 2132 | */ |
| 2133 | void |
| 2134 | xmlXPtrRangeToFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 2135 | xmlXPathObjectPtr range; |
| 2136 | const xmlChar *cur; |
| 2137 | xmlXPathObjectPtr res, obj; |
| 2138 | xmlXPathObjectPtr tmp; |
| 2139 | xmlLocationSetPtr newset = NULL; |
| 2140 | xmlNodeSetPtr oldset; |
| 2141 | int i; |
| 2142 | |
| 2143 | CHECK_ARITY(1); |
| 2144 | /* |
| 2145 | * Save the expression pointer since we will have to evaluate |
| 2146 | * it multiple times. Initialize the new set. |
| 2147 | */ |
| 2148 | CHECK_TYPE(XPATH_NODESET); |
| 2149 | obj = valuePop(ctxt); |
| 2150 | oldset = obj->nodesetval; |
| 2151 | ctxt->context->node = NULL; |
| 2152 | |
| 2153 | cur = ctxt->cur; |
| 2154 | newset = xmlXPtrLocationSetCreate(NULL); |
| 2155 | |
| 2156 | for (i = 0; i < oldset->nodeNr; i++) { |
| 2157 | ctxt->cur = cur; |
| 2158 | |
| 2159 | /* |
| 2160 | * Run the evaluation with a node list made of a single item |
| 2161 | * in the nodeset. |
| 2162 | */ |
| 2163 | ctxt->context->node = oldset->nodeTab[i]; |
| 2164 | tmp = xmlXPathNewNodeSet(ctxt->context->node); |
| 2165 | valuePush(ctxt, tmp); |
| 2166 | |
| 2167 | xmlXPathEvalExpr(ctxt); |
| 2168 | CHECK_ERROR; |
| 2169 | |
| 2170 | /* |
| 2171 | * The result of the evaluation need to be tested to |
| 2172 | * decided whether the filter succeeded or not |
| 2173 | */ |
| 2174 | res = valuePop(ctxt); |
| 2175 | range = xmlXPtrNewRangeNodeObject(oldset->nodeTab[i], res); |
| 2176 | if (range != NULL) { |
| 2177 | xmlXPtrLocationSetAdd(newset, range); |
| 2178 | } |
| 2179 | |
| 2180 | /* |
| 2181 | * Cleanup |
| 2182 | */ |
| 2183 | if (res != NULL) |
| 2184 | xmlXPathFreeObject(res); |
| 2185 | if (ctxt->value == tmp) { |
| 2186 | res = valuePop(ctxt); |
| 2187 | xmlXPathFreeObject(res); |
| 2188 | } |
| 2189 | |
| 2190 | ctxt->context->node = NULL; |
| 2191 | } |
| 2192 | |
| 2193 | /* |
| 2194 | * The result is used as the new evaluation set. |
| 2195 | */ |
| 2196 | xmlXPathFreeObject(obj); |
| 2197 | ctxt->context->node = NULL; |
| 2198 | ctxt->context->contextSize = -1; |
| 2199 | ctxt->context->proximityPosition = -1; |
| 2200 | valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); |
| 2201 | } |
| 2202 | |
| 2203 | /** |
| 2204 | * xmlXPtrAdvanceNode: |
| 2205 | * @cur: the node |
| 2206 | * |
| 2207 | * Advance to the next element or text node in document order |
| 2208 | * TODO: add a stack for entering/exiting entities |
| 2209 | * |
| 2210 | * Returns -1 in case of failure, 0 otherwise |
| 2211 | */ |
| 2212 | xmlNodePtr |
| 2213 | xmlXPtrAdvanceNode(xmlNodePtr cur) { |
| 2214 | next: |
| 2215 | if (cur == NULL) |
| 2216 | return(NULL); |
| 2217 | if (cur->children != NULL) { |
| 2218 | cur = cur->children ; |
| 2219 | goto found; |
| 2220 | } |
| 2221 | if (cur->next != NULL) { |
| 2222 | cur = cur->next; |
| 2223 | goto found; |
| 2224 | } |
| 2225 | do { |
| 2226 | cur = cur->parent; |
| 2227 | if (cur == NULL) return(NULL); |
| 2228 | if (cur->next != NULL) { |
| 2229 | cur = cur->next; |
| 2230 | goto found; |
| 2231 | } |
| 2232 | } while (cur != NULL); |
| 2233 | |
| 2234 | found: |
| 2235 | if ((cur->type != XML_ELEMENT_NODE) && |
| 2236 | (cur->type != XML_TEXT_NODE) && |
| 2237 | (cur->type != XML_DOCUMENT_NODE) && |
| 2238 | (cur->type != XML_HTML_DOCUMENT_NODE) && |
| 2239 | (cur->type != XML_CDATA_SECTION_NODE)) |
| 2240 | goto next; |
| 2241 | if (cur->type == XML_ENTITY_REF_NODE) { |
| 2242 | TODO |
| 2243 | } |
| 2244 | return(cur); |
| 2245 | } |
| 2246 | |
| 2247 | /** |
| 2248 | * xmlXPtrAdvanceChar: |
| 2249 | * @node: the node |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2250 | * @indx: the indx |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2251 | * @bytes: the number of bytes |
| 2252 | * |
| 2253 | * Advance a point of the associated number of bytes (not UTF8 chars) |
| 2254 | * |
| 2255 | * Returns -1 in case of failure, 0 otherwise |
| 2256 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2257 | static int |
| 2258 | xmlXPtrAdvanceChar(xmlNodePtr *node, int *indx, int bytes) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2259 | xmlNodePtr cur; |
| 2260 | int pos; |
| 2261 | int len; |
| 2262 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2263 | if ((node == NULL) || (indx == NULL)) |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2264 | return(-1); |
| 2265 | cur = *node; |
| 2266 | if (cur == NULL) |
| 2267 | return(-1); |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2268 | pos = *indx; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2269 | |
| 2270 | while (bytes >= 0) { |
| 2271 | /* |
| 2272 | * First position to the beginning of the first text node |
| 2273 | * corresponding to this point |
| 2274 | */ |
| 2275 | while ((cur != NULL) && |
| 2276 | ((cur->type == XML_ELEMENT_NODE) || |
| 2277 | (cur->type == XML_DOCUMENT_NODE) || |
| 2278 | (cur->type == XML_HTML_DOCUMENT_NODE))) { |
| 2279 | if (pos > 0) { |
| 2280 | cur = xmlXPtrGetNthChild(cur, pos); |
| 2281 | pos = 0; |
| 2282 | } else { |
| 2283 | cur = xmlXPtrAdvanceNode(cur); |
| 2284 | pos = 0; |
| 2285 | } |
| 2286 | } |
| 2287 | |
| 2288 | if (cur == NULL) { |
| 2289 | *node = NULL; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2290 | *indx = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2291 | return(-1); |
| 2292 | } |
| 2293 | |
| 2294 | /* |
| 2295 | * if there is no move needed return the current value. |
| 2296 | */ |
| 2297 | if (pos == 0) pos = 1; |
| 2298 | if (bytes == 0) { |
| 2299 | *node = cur; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2300 | *indx = pos; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2301 | return(0); |
| 2302 | } |
| 2303 | /* |
| 2304 | * We should have a text (or cdata) node ... |
| 2305 | */ |
| 2306 | len = 0; |
Daniel Veillard | 7db3773 | 2001-07-12 01:20:08 +0000 | [diff] [blame] | 2307 | if ((cur->type != XML_ELEMENT_NODE) && |
| 2308 | (cur->content != NULL)) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2309 | len = xmlStrlen(cur->content); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2310 | } |
| 2311 | if (pos > len) { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2312 | /* Strange, the indx in the text node is greater than it's len */ |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2313 | STRANGE |
| 2314 | pos = len; |
| 2315 | } |
| 2316 | if (pos + bytes >= len) { |
| 2317 | bytes -= (len - pos); |
| 2318 | cur = xmlXPtrAdvanceNode(cur); |
| 2319 | cur = 0; |
| 2320 | } else if (pos + bytes < len) { |
| 2321 | pos += bytes; |
| 2322 | *node = cur; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2323 | *indx = pos; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2324 | return(0); |
| 2325 | } |
| 2326 | } |
| 2327 | return(-1); |
| 2328 | } |
| 2329 | |
| 2330 | /** |
| 2331 | * xmlXPtrMatchString: |
| 2332 | * @string: the string to search |
| 2333 | * @start: the start textnode |
| 2334 | * @startindex: the start index |
| 2335 | * @end: the end textnode IN/OUT |
| 2336 | * @endindex: the end index IN/OUT |
| 2337 | * |
| 2338 | * Check whether the document contains @string at the position |
| 2339 | * (@start, @startindex) and limited by the (@end, @endindex) point |
| 2340 | * |
| 2341 | * Returns -1 in case of failure, 0 if not found, 1 if found in which case |
| 2342 | * (@start, @startindex) will indicate the position of the beginning |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 2343 | * of the range and (@end, @endindex) will indicate the end |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2344 | * of the range |
| 2345 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2346 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2347 | xmlXPtrMatchString(const xmlChar *string, xmlNodePtr start, int startindex, |
| 2348 | xmlNodePtr *end, int *endindex) { |
| 2349 | xmlNodePtr cur; |
| 2350 | int pos; /* 0 based */ |
| 2351 | int len; /* in bytes */ |
| 2352 | int stringlen; /* in bytes */ |
| 2353 | int match; |
| 2354 | |
| 2355 | if (string == NULL) |
| 2356 | return(-1); |
| 2357 | if (start == NULL) |
| 2358 | return(-1); |
| 2359 | if ((end == NULL) || (endindex == NULL)) |
| 2360 | return(-1); |
| 2361 | cur = start; |
| 2362 | if (cur == NULL) |
| 2363 | return(-1); |
| 2364 | pos = startindex - 1; |
| 2365 | stringlen = xmlStrlen(string); |
| 2366 | |
| 2367 | while (stringlen > 0) { |
| 2368 | if ((cur == *end) && (pos + stringlen > *endindex)) |
| 2369 | return(0); |
Daniel Veillard | 7db3773 | 2001-07-12 01:20:08 +0000 | [diff] [blame] | 2370 | |
| 2371 | if ((cur->type != XML_ELEMENT_NODE) && (cur->content != NULL)) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2372 | len = xmlStrlen(cur->content); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2373 | if (len >= pos + stringlen) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2374 | match = (!xmlStrncmp(&cur->content[pos], string, stringlen)); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2375 | if (match) { |
| 2376 | #ifdef DEBUG_RANGES |
| 2377 | xmlGenericError(xmlGenericErrorContext, |
| 2378 | "found range %d bytes at index %d of ->", |
| 2379 | stringlen, pos + 1); |
| 2380 | xmlDebugDumpString(stdout, cur->content); |
| 2381 | xmlGenericError(xmlGenericErrorContext, "\n"); |
| 2382 | #endif |
| 2383 | *end = cur; |
| 2384 | *endindex = pos + stringlen; |
| 2385 | return(1); |
| 2386 | } else { |
| 2387 | return(0); |
| 2388 | } |
| 2389 | } else { |
| 2390 | int sub = len - pos; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2391 | match = (!xmlStrncmp(&cur->content[pos], string, sub)); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2392 | if (match) { |
| 2393 | #ifdef DEBUG_RANGES |
| 2394 | xmlGenericError(xmlGenericErrorContext, |
| 2395 | "found subrange %d bytes at index %d of ->", |
| 2396 | sub, pos + 1); |
| 2397 | xmlDebugDumpString(stdout, cur->content); |
| 2398 | xmlGenericError(xmlGenericErrorContext, "\n"); |
| 2399 | #endif |
| 2400 | string = &string[sub]; |
| 2401 | stringlen -= sub; |
| 2402 | } else { |
| 2403 | return(0); |
| 2404 | } |
| 2405 | } |
| 2406 | } |
| 2407 | cur = xmlXPtrAdvanceNode(cur); |
| 2408 | if (cur == NULL) |
| 2409 | return(0); |
| 2410 | pos = 0; |
| 2411 | } |
| 2412 | return(1); |
| 2413 | } |
| 2414 | |
| 2415 | /** |
| 2416 | * xmlXPtrSearchString: |
| 2417 | * @string: the string to search |
| 2418 | * @start: the start textnode IN/OUT |
| 2419 | * @startindex: the start index IN/OUT |
| 2420 | * @end: the end textnode |
| 2421 | * @endindex: the end index |
| 2422 | * |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 2423 | * Search the next occurrence of @string within the document content |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2424 | * until the (@end, @endindex) point is reached |
| 2425 | * |
| 2426 | * Returns -1 in case of failure, 0 if not found, 1 if found in which case |
| 2427 | * (@start, @startindex) will indicate the position of the beginning |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 2428 | * of the range and (@end, @endindex) will indicate the end |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2429 | * of the range |
| 2430 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2431 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2432 | xmlXPtrSearchString(const xmlChar *string, xmlNodePtr *start, int *startindex, |
| 2433 | xmlNodePtr *end, int *endindex) { |
| 2434 | xmlNodePtr cur; |
| 2435 | const xmlChar *str; |
| 2436 | int pos; /* 0 based */ |
| 2437 | int len; /* in bytes */ |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2438 | xmlChar first; |
| 2439 | |
| 2440 | if (string == NULL) |
| 2441 | return(-1); |
| 2442 | if ((start == NULL) || (startindex == NULL)) |
| 2443 | return(-1); |
| 2444 | if ((end == NULL) || (endindex == NULL)) |
| 2445 | return(-1); |
| 2446 | cur = *start; |
| 2447 | if (cur == NULL) |
| 2448 | return(-1); |
| 2449 | pos = *startindex - 1; |
| 2450 | first = string[0]; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2451 | |
| 2452 | while (cur != NULL) { |
Daniel Veillard | 7db3773 | 2001-07-12 01:20:08 +0000 | [diff] [blame] | 2453 | if ((cur->type != XML_ELEMENT_NODE) && (cur->content != NULL)) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2454 | len = xmlStrlen(cur->content); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2455 | while (pos <= len) { |
| 2456 | if (first != 0) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2457 | str = xmlStrchr(&cur->content[pos], first); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2458 | if (str != NULL) { |
| 2459 | pos = (str - (xmlChar *)(cur->content)); |
| 2460 | #ifdef DEBUG_RANGES |
| 2461 | xmlGenericError(xmlGenericErrorContext, |
| 2462 | "found '%c' at index %d of ->", |
| 2463 | first, pos + 1); |
| 2464 | xmlDebugDumpString(stdout, cur->content); |
| 2465 | xmlGenericError(xmlGenericErrorContext, "\n"); |
| 2466 | #endif |
| 2467 | if (xmlXPtrMatchString(string, cur, pos + 1, |
| 2468 | end, endindex)) { |
| 2469 | *start = cur; |
| 2470 | *startindex = pos + 1; |
| 2471 | return(1); |
| 2472 | } |
| 2473 | pos++; |
| 2474 | } else { |
| 2475 | pos = len + 1; |
| 2476 | } |
| 2477 | } else { |
| 2478 | /* |
| 2479 | * An empty string is considered to match before each |
| 2480 | * character of the string-value and after the final |
| 2481 | * character. |
| 2482 | */ |
| 2483 | #ifdef DEBUG_RANGES |
| 2484 | xmlGenericError(xmlGenericErrorContext, |
| 2485 | "found '' at index %d of ->", |
| 2486 | pos + 1); |
| 2487 | xmlDebugDumpString(stdout, cur->content); |
| 2488 | xmlGenericError(xmlGenericErrorContext, "\n"); |
| 2489 | #endif |
| 2490 | *start = cur; |
| 2491 | *startindex = pos + 1; |
| 2492 | *end = cur; |
| 2493 | *endindex = pos + 1; |
| 2494 | return(1); |
| 2495 | } |
| 2496 | } |
| 2497 | } |
| 2498 | if ((cur == *end) && (pos >= *endindex)) |
| 2499 | return(0); |
| 2500 | cur = xmlXPtrAdvanceNode(cur); |
| 2501 | if (cur == NULL) |
| 2502 | return(0); |
| 2503 | pos = 1; |
| 2504 | } |
| 2505 | return(0); |
| 2506 | } |
| 2507 | |
| 2508 | /** |
| 2509 | * xmlXPtrGetLastChar: |
| 2510 | * @node: the node |
| 2511 | * @index: the index |
| 2512 | * |
| 2513 | * Computes the point coordinates of the last char of this point |
| 2514 | * |
| 2515 | * Returns -1 in case of failure, 0 otherwise |
| 2516 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2517 | static int |
| 2518 | xmlXPtrGetLastChar(xmlNodePtr *node, int *indx) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2519 | xmlNodePtr cur; |
| 2520 | int pos, len = 0; |
| 2521 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2522 | if ((node == NULL) || (indx == NULL)) |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2523 | return(-1); |
| 2524 | cur = *node; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2525 | pos = *indx; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2526 | |
| 2527 | if (cur == NULL) |
| 2528 | return(-1); |
| 2529 | |
| 2530 | if ((cur->type == XML_ELEMENT_NODE) || |
| 2531 | (cur->type == XML_DOCUMENT_NODE) || |
| 2532 | (cur->type == XML_HTML_DOCUMENT_NODE)) { |
| 2533 | if (pos > 0) { |
| 2534 | cur = xmlXPtrGetNthChild(cur, pos); |
| 2535 | pos = 0; |
| 2536 | } |
| 2537 | } |
| 2538 | while (cur != NULL) { |
| 2539 | if (cur->last != NULL) |
| 2540 | cur = cur->last; |
Daniel Veillard | 7db3773 | 2001-07-12 01:20:08 +0000 | [diff] [blame] | 2541 | else if ((cur->type != XML_ELEMENT_NODE) && |
| 2542 | (cur->content != NULL)) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2543 | len = xmlStrlen(cur->content); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2544 | break; |
| 2545 | } else { |
| 2546 | return(-1); |
| 2547 | } |
| 2548 | } |
| 2549 | if (cur == NULL) |
| 2550 | return(-1); |
| 2551 | *node = cur; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2552 | *indx = len; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2553 | return(0); |
| 2554 | } |
| 2555 | |
| 2556 | /** |
| 2557 | * xmlXPtrGetStartPoint: |
| 2558 | * @obj: an range |
| 2559 | * @node: the resulting node |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2560 | * @indx: the resulting index |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2561 | * |
| 2562 | * read the object and return the start point coordinates. |
| 2563 | * |
| 2564 | * Returns -1 in case of failure, 0 otherwise |
| 2565 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2566 | static int |
| 2567 | xmlXPtrGetStartPoint(xmlXPathObjectPtr obj, xmlNodePtr *node, int *indx) { |
| 2568 | if ((obj == NULL) || (node == NULL) || (indx == NULL)) |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2569 | return(-1); |
| 2570 | |
| 2571 | switch (obj->type) { |
| 2572 | case XPATH_POINT: |
| 2573 | *node = obj->user; |
| 2574 | if (obj->index <= 0) |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2575 | *indx = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2576 | else |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2577 | *indx = obj->index; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2578 | return(0); |
| 2579 | case XPATH_RANGE: |
| 2580 | *node = obj->user; |
| 2581 | if (obj->index <= 0) |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2582 | *indx = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2583 | else |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2584 | *indx = obj->index; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2585 | return(0); |
| 2586 | default: |
Daniel Veillard | b44025c | 2001-10-11 22:55:55 +0000 | [diff] [blame] | 2587 | break; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2588 | } |
| 2589 | return(-1); |
| 2590 | } |
| 2591 | |
| 2592 | /** |
| 2593 | * xmlXPtrGetEndPoint: |
| 2594 | * @obj: an range |
| 2595 | * @node: the resulting node |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2596 | * @indx: the resulting indx |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2597 | * |
| 2598 | * read the object and return the end point coordinates. |
| 2599 | * |
| 2600 | * Returns -1 in case of failure, 0 otherwise |
| 2601 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2602 | static int |
| 2603 | xmlXPtrGetEndPoint(xmlXPathObjectPtr obj, xmlNodePtr *node, int *indx) { |
| 2604 | if ((obj == NULL) || (node == NULL) || (indx == NULL)) |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2605 | return(-1); |
| 2606 | |
| 2607 | switch (obj->type) { |
| 2608 | case XPATH_POINT: |
| 2609 | *node = obj->user; |
| 2610 | if (obj->index <= 0) |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2611 | *indx = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2612 | else |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2613 | *indx = obj->index; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2614 | return(0); |
| 2615 | case XPATH_RANGE: |
| 2616 | *node = obj->user; |
| 2617 | if (obj->index <= 0) |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2618 | *indx = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2619 | else |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2620 | *indx = obj->index; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2621 | return(0); |
| 2622 | default: |
Daniel Veillard | b44025c | 2001-10-11 22:55:55 +0000 | [diff] [blame] | 2623 | break; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2624 | } |
| 2625 | return(-1); |
| 2626 | } |
| 2627 | |
| 2628 | /** |
| 2629 | * xmlXPtrStringRangeFunction: |
| 2630 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2631 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2632 | * |
| 2633 | * Function implementing the string-range() function |
| 2634 | * range as described in 5.4.2 |
| 2635 | * |
| 2636 | * ------------------------------ |
| 2637 | * [Definition: For each location in the location-set argument, |
| 2638 | * string-range returns a set of string ranges, a set of substrings in a |
| 2639 | * string. Specifically, the string-value of the location is searched for |
| 2640 | * substrings that match the string argument, and the resulting location-set |
| 2641 | * will contain a range location for each non-overlapping match.] |
| 2642 | * An empty string is considered to match before each character of the |
| 2643 | * string-value and after the final character. Whitespace in a string |
| 2644 | * is matched literally, with no normalization except that provided by |
| 2645 | * XML for line ends. The third argument gives the position of the first |
| 2646 | * character to be in the resulting range, relative to the start of the |
| 2647 | * match. The default value is 1, which makes the range start immediately |
| 2648 | * before the first character of the matched string. The fourth argument |
| 2649 | * gives the number of characters in the range; the default is that the |
| 2650 | * range extends to the end of the matched string. |
| 2651 | * |
| 2652 | * Element boundaries, as well as entire embedded nodes such as processing |
| 2653 | * instructions and comments, are ignored as defined in [XPath]. |
| 2654 | * |
| 2655 | * If the string in the second argument is not found in the string-value |
| 2656 | * of the location, or if a value in the third or fourth argument indicates |
| 2657 | * a string that is beyond the beginning or end of the document, the |
| 2658 | * expression fails. |
| 2659 | * |
| 2660 | * The points of the range-locations in the returned location-set will |
| 2661 | * all be character points. |
| 2662 | * ------------------------------ |
| 2663 | */ |
| 2664 | void |
| 2665 | xmlXPtrStringRangeFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 2666 | int i, startindex, endindex, fendindex; |
| 2667 | xmlNodePtr start, end, fend; |
| 2668 | xmlXPathObjectPtr set; |
| 2669 | xmlLocationSetPtr oldset; |
| 2670 | xmlLocationSetPtr newset; |
| 2671 | xmlXPathObjectPtr string; |
| 2672 | xmlXPathObjectPtr position = NULL; |
| 2673 | xmlXPathObjectPtr number = NULL; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2674 | int found, pos = 0, num = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2675 | |
| 2676 | /* |
| 2677 | * Grab the arguments |
| 2678 | */ |
| 2679 | if ((nargs < 2) || (nargs > 4)) |
| 2680 | XP_ERROR(XPATH_INVALID_ARITY); |
| 2681 | |
| 2682 | if (nargs >= 4) { |
| 2683 | CHECK_TYPE(XPATH_NUMBER); |
| 2684 | number = valuePop(ctxt); |
| 2685 | if (number != NULL) |
Daniel Veillard | 87ee914 | 2001-06-28 12:54:16 +0000 | [diff] [blame] | 2686 | num = (int) number->floatval; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2687 | } |
| 2688 | if (nargs >= 3) { |
| 2689 | CHECK_TYPE(XPATH_NUMBER); |
| 2690 | position = valuePop(ctxt); |
| 2691 | if (position != NULL) |
Daniel Veillard | 87ee914 | 2001-06-28 12:54:16 +0000 | [diff] [blame] | 2692 | pos = (int) position->floatval; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2693 | } |
| 2694 | CHECK_TYPE(XPATH_STRING); |
| 2695 | string = valuePop(ctxt); |
| 2696 | if ((ctxt->value == NULL) || |
| 2697 | ((ctxt->value->type != XPATH_LOCATIONSET) && |
| 2698 | (ctxt->value->type != XPATH_NODESET))) |
| 2699 | XP_ERROR(XPATH_INVALID_TYPE) |
| 2700 | |
| 2701 | set = valuePop(ctxt); |
| 2702 | if (set->type == XPATH_NODESET) { |
| 2703 | xmlXPathObjectPtr tmp; |
| 2704 | |
| 2705 | /* |
| 2706 | * First convert to a location set |
| 2707 | */ |
| 2708 | tmp = xmlXPtrNewLocationSetNodeSet(set->nodesetval); |
| 2709 | xmlXPathFreeObject(set); |
| 2710 | set = tmp; |
| 2711 | } |
| 2712 | oldset = (xmlLocationSetPtr) set->user; |
| 2713 | |
| 2714 | /* |
| 2715 | * The loop is to search for each element in the location set |
| 2716 | * the list of location set corresponding to that search |
| 2717 | */ |
| 2718 | newset = xmlXPtrLocationSetCreate(NULL); |
| 2719 | for (i = 0;i < oldset->locNr;i++) { |
| 2720 | #ifdef DEBUG_RANGES |
| 2721 | xmlXPathDebugDumpObject(stdout, oldset->locTab[i], 0); |
| 2722 | #endif |
| 2723 | |
| 2724 | xmlXPtrGetStartPoint(oldset->locTab[i], &start, &startindex); |
| 2725 | xmlXPtrGetEndPoint(oldset->locTab[i], &end, &endindex); |
| 2726 | xmlXPtrAdvanceChar(&start, &startindex, 0); |
| 2727 | xmlXPtrGetLastChar(&end, &endindex); |
| 2728 | |
| 2729 | #ifdef DEBUG_RANGES |
| 2730 | xmlGenericError(xmlGenericErrorContext, |
| 2731 | "from index %d of ->", startindex); |
| 2732 | xmlDebugDumpString(stdout, start->content); |
| 2733 | xmlGenericError(xmlGenericErrorContext, "\n"); |
| 2734 | xmlGenericError(xmlGenericErrorContext, |
| 2735 | "to index %d of ->", endindex); |
| 2736 | xmlDebugDumpString(stdout, end->content); |
| 2737 | xmlGenericError(xmlGenericErrorContext, "\n"); |
| 2738 | #endif |
| 2739 | do { |
| 2740 | fend = end; |
| 2741 | fendindex = endindex; |
| 2742 | found = xmlXPtrSearchString(string->stringval, &start, &startindex, |
| 2743 | &fend, &fendindex); |
| 2744 | if (found == 1) { |
| 2745 | if (position == NULL) { |
| 2746 | xmlXPtrLocationSetAdd(newset, |
| 2747 | xmlXPtrNewRange(start, startindex, fend, fendindex)); |
| 2748 | } else if (xmlXPtrAdvanceChar(&start, &startindex, |
| 2749 | pos - 1) == 0) { |
| 2750 | if ((number != NULL) && (num > 0)) { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2751 | int rindx; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2752 | xmlNodePtr rend; |
| 2753 | rend = start; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2754 | rindx = startindex - 1; |
| 2755 | if (xmlXPtrAdvanceChar(&rend, &rindx, |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2756 | num) == 0) { |
| 2757 | xmlXPtrLocationSetAdd(newset, |
| 2758 | xmlXPtrNewRange(start, startindex, |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2759 | rend, rindx)); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2760 | } |
| 2761 | } else if ((number != NULL) && (num <= 0)) { |
| 2762 | xmlXPtrLocationSetAdd(newset, |
| 2763 | xmlXPtrNewRange(start, startindex, |
| 2764 | start, startindex)); |
| 2765 | } else { |
| 2766 | xmlXPtrLocationSetAdd(newset, |
| 2767 | xmlXPtrNewRange(start, startindex, |
| 2768 | fend, fendindex)); |
| 2769 | } |
| 2770 | } |
| 2771 | start = fend; |
| 2772 | startindex = fendindex; |
| 2773 | if (string->stringval[0] == 0) |
| 2774 | startindex++; |
| 2775 | } |
| 2776 | } while (found == 1); |
| 2777 | } |
| 2778 | |
| 2779 | /* |
| 2780 | * Save the new value and cleanup |
| 2781 | */ |
| 2782 | valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); |
| 2783 | xmlXPathFreeObject(set); |
| 2784 | xmlXPathFreeObject(string); |
| 2785 | if (position) xmlXPathFreeObject(position); |
| 2786 | if (number) xmlXPathFreeObject(number); |
| 2787 | } |
| 2788 | |
| 2789 | /** |
| 2790 | * xmlXPtrEvalRangePredicate: |
| 2791 | * @ctxt: the XPointer Parser context |
| 2792 | * |
| 2793 | * [8] Predicate ::= '[' PredicateExpr ']' |
| 2794 | * [9] PredicateExpr ::= Expr |
| 2795 | * |
| 2796 | * Evaluate a predicate as in xmlXPathEvalPredicate() but for |
| 2797 | * a Location Set instead of a node set |
| 2798 | */ |
| 2799 | void |
| 2800 | xmlXPtrEvalRangePredicate(xmlXPathParserContextPtr ctxt) { |
| 2801 | const xmlChar *cur; |
| 2802 | xmlXPathObjectPtr res; |
| 2803 | xmlXPathObjectPtr obj, tmp; |
| 2804 | xmlLocationSetPtr newset = NULL; |
| 2805 | xmlLocationSetPtr oldset; |
| 2806 | int i; |
| 2807 | |
| 2808 | SKIP_BLANKS; |
| 2809 | if (CUR != '[') { |
| 2810 | XP_ERROR(XPATH_INVALID_PREDICATE_ERROR); |
| 2811 | } |
| 2812 | NEXT; |
| 2813 | SKIP_BLANKS; |
| 2814 | |
| 2815 | /* |
| 2816 | * Extract the old set, and then evaluate the result of the |
| 2817 | * expression for all the element in the set. use it to grow |
| 2818 | * up a new set. |
| 2819 | */ |
| 2820 | CHECK_TYPE(XPATH_LOCATIONSET); |
| 2821 | obj = valuePop(ctxt); |
| 2822 | oldset = obj->user; |
| 2823 | ctxt->context->node = NULL; |
| 2824 | |
| 2825 | if ((oldset == NULL) || (oldset->locNr == 0)) { |
| 2826 | ctxt->context->contextSize = 0; |
| 2827 | ctxt->context->proximityPosition = 0; |
| 2828 | xmlXPathEvalExpr(ctxt); |
| 2829 | res = valuePop(ctxt); |
| 2830 | if (res != NULL) |
| 2831 | xmlXPathFreeObject(res); |
| 2832 | valuePush(ctxt, obj); |
| 2833 | CHECK_ERROR; |
| 2834 | } else { |
| 2835 | /* |
| 2836 | * Save the expression pointer since we will have to evaluate |
| 2837 | * it multiple times. Initialize the new set. |
| 2838 | */ |
| 2839 | cur = ctxt->cur; |
| 2840 | newset = xmlXPtrLocationSetCreate(NULL); |
| 2841 | |
| 2842 | for (i = 0; i < oldset->locNr; i++) { |
| 2843 | ctxt->cur = cur; |
| 2844 | |
| 2845 | /* |
| 2846 | * Run the evaluation with a node list made of a single item |
| 2847 | * in the nodeset. |
| 2848 | */ |
| 2849 | ctxt->context->node = oldset->locTab[i]->user; |
| 2850 | tmp = xmlXPathNewNodeSet(ctxt->context->node); |
| 2851 | valuePush(ctxt, tmp); |
| 2852 | ctxt->context->contextSize = oldset->locNr; |
| 2853 | ctxt->context->proximityPosition = i + 1; |
| 2854 | |
| 2855 | xmlXPathEvalExpr(ctxt); |
| 2856 | CHECK_ERROR; |
| 2857 | |
| 2858 | /* |
| 2859 | * The result of the evaluation need to be tested to |
| 2860 | * decided whether the filter succeeded or not |
| 2861 | */ |
| 2862 | res = valuePop(ctxt); |
| 2863 | if (xmlXPathEvaluatePredicateResult(ctxt, res)) { |
| 2864 | xmlXPtrLocationSetAdd(newset, |
| 2865 | xmlXPathObjectCopy(oldset->locTab[i])); |
| 2866 | } |
| 2867 | |
| 2868 | /* |
| 2869 | * Cleanup |
| 2870 | */ |
| 2871 | if (res != NULL) |
| 2872 | xmlXPathFreeObject(res); |
| 2873 | if (ctxt->value == tmp) { |
| 2874 | res = valuePop(ctxt); |
| 2875 | xmlXPathFreeObject(res); |
| 2876 | } |
| 2877 | |
| 2878 | ctxt->context->node = NULL; |
| 2879 | } |
| 2880 | |
| 2881 | /* |
| 2882 | * The result is used as the new evaluation set. |
| 2883 | */ |
| 2884 | xmlXPathFreeObject(obj); |
| 2885 | ctxt->context->node = NULL; |
| 2886 | ctxt->context->contextSize = -1; |
| 2887 | ctxt->context->proximityPosition = -1; |
| 2888 | valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); |
| 2889 | } |
| 2890 | if (CUR != ']') { |
| 2891 | XP_ERROR(XPATH_INVALID_PREDICATE_ERROR); |
| 2892 | } |
| 2893 | |
| 2894 | NEXT; |
| 2895 | SKIP_BLANKS; |
| 2896 | } |
| 2897 | |
| 2898 | #else |
| 2899 | #endif |
| 2900 | |