Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1 | /* |
| 2 | * xpointer.c : Code to handle XML Pointer |
| 3 | * |
Daniel Veillard | 9a237c9 | 2003-02-13 15:52:58 +0000 | [diff] [blame] | 4 | * Base implementation was made accordingly to |
| 5 | * W3C Candidate Recommendation 7 June 2000 |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6 | * http://www.w3.org/TR/2000/CR-xptr-20000607 |
| 7 | * |
Daniel Veillard | 9a237c9 | 2003-02-13 15:52:58 +0000 | [diff] [blame] | 8 | * Added support for the element() scheme described in: |
| 9 | * W3C Proposed Recommendation 13 November 2002 |
| 10 | * http://www.w3.org/TR/2002/PR-xptr-element-20021113/ |
| 11 | * |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 12 | * See Copyright for the status of this software. |
| 13 | * |
Daniel Veillard | c5d6434 | 2001-06-24 12:13:24 +0000 | [diff] [blame] | 14 | * daniel@veillard.com |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 15 | */ |
| 16 | |
Daniel Veillard | 34ce8be | 2002-03-18 19:37:11 +0000 | [diff] [blame] | 17 | #define IN_LIBXML |
Bjorn Reese | 70a9da5 | 2001-04-21 16:57:29 +0000 | [diff] [blame] | 18 | #include "libxml.h" |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 19 | |
Daniel Veillard | f69bb4b | 2001-05-19 13:24:56 +0000 | [diff] [blame] | 20 | /* |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 21 | * TODO: better handling of error cases, the full expression should |
| 22 | * be parsed beforehand instead of a progressive evaluation |
| 23 | * TODO: Access into entities references are not supported now ... |
| 24 | * need a start to be able to pop out of entities refs since |
| 25 | * parent is the endity declaration, not the ref. |
| 26 | */ |
| 27 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 28 | #include <string.h> |
| 29 | #include <libxml/xpointer.h> |
| 30 | #include <libxml/xmlmemory.h> |
| 31 | #include <libxml/parserInternals.h> |
| 32 | #include <libxml/uri.h> |
| 33 | #include <libxml/xpath.h> |
| 34 | #include <libxml/xpathInternals.h> |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 35 | #include <libxml/xmlerror.h> |
Daniel Veillard | 3c01b1d | 2001-10-17 15:58:35 +0000 | [diff] [blame] | 36 | #include <libxml/globals.h> |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 37 | |
| 38 | #ifdef LIBXML_XPTR_ENABLED |
| 39 | |
| 40 | /* Add support of the xmlns() xpointer scheme to initialize the namespaces */ |
| 41 | #define XPTR_XMLNS_SCHEME |
| 42 | |
| 43 | /* #define DEBUG_RANGES */ |
Daniel Veillard | 017b108 | 2001-06-21 11:20:21 +0000 | [diff] [blame] | 44 | #ifdef DEBUG_RANGES |
| 45 | #ifdef LIBXML_DEBUG_ENABLED |
| 46 | #include <libxml/debugXML.h> |
| 47 | #endif |
| 48 | #endif |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 49 | |
| 50 | #define TODO \ |
| 51 | xmlGenericError(xmlGenericErrorContext, \ |
| 52 | "Unimplemented block at %s:%d\n", \ |
| 53 | __FILE__, __LINE__); |
| 54 | |
| 55 | #define STRANGE \ |
| 56 | xmlGenericError(xmlGenericErrorContext, \ |
| 57 | "Internal error at %s:%d\n", \ |
| 58 | __FILE__, __LINE__); |
| 59 | |
| 60 | /************************************************************************ |
| 61 | * * |
| 62 | * A few helper functions for child sequences * |
| 63 | * * |
| 64 | ************************************************************************/ |
| 65 | |
| 66 | xmlNodePtr xmlXPtrAdvanceNode(xmlNodePtr cur); |
| 67 | /** |
| 68 | * xmlXPtrGetArity: |
| 69 | * @cur: the node |
| 70 | * |
| 71 | * Returns the number of child for an element, -1 in case of error |
| 72 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 73 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 74 | xmlXPtrGetArity(xmlNodePtr cur) { |
| 75 | int i; |
| 76 | if (cur == NULL) |
| 77 | return(-1); |
| 78 | cur = cur->children; |
| 79 | for (i = 0;cur != NULL;cur = cur->next) { |
| 80 | if ((cur->type == XML_ELEMENT_NODE) || |
| 81 | (cur->type == XML_DOCUMENT_NODE) || |
| 82 | (cur->type == XML_HTML_DOCUMENT_NODE)) { |
| 83 | i++; |
| 84 | } |
| 85 | } |
| 86 | return(i); |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * xmlXPtrGetIndex: |
| 91 | * @cur: the node |
| 92 | * |
| 93 | * Returns the index of the node in its parent children list, -1 |
| 94 | * in case of error |
| 95 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 96 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 97 | xmlXPtrGetIndex(xmlNodePtr cur) { |
| 98 | int i; |
| 99 | if (cur == NULL) |
| 100 | return(-1); |
| 101 | for (i = 1;cur != NULL;cur = cur->prev) { |
| 102 | if ((cur->type == XML_ELEMENT_NODE) || |
| 103 | (cur->type == XML_DOCUMENT_NODE) || |
| 104 | (cur->type == XML_HTML_DOCUMENT_NODE)) { |
| 105 | i++; |
| 106 | } |
| 107 | } |
| 108 | return(i); |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * xmlXPtrGetNthChild: |
| 113 | * @cur: the node |
| 114 | * @no: the child number |
| 115 | * |
| 116 | * Returns the @no'th element child of @cur or NULL |
| 117 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 118 | static xmlNodePtr |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 119 | xmlXPtrGetNthChild(xmlNodePtr cur, int no) { |
| 120 | int i; |
| 121 | if (cur == NULL) |
| 122 | return(cur); |
| 123 | cur = cur->children; |
| 124 | for (i = 0;i <= no;cur = cur->next) { |
| 125 | if (cur == NULL) |
| 126 | return(cur); |
| 127 | if ((cur->type == XML_ELEMENT_NODE) || |
| 128 | (cur->type == XML_DOCUMENT_NODE) || |
| 129 | (cur->type == XML_HTML_DOCUMENT_NODE)) { |
| 130 | i++; |
| 131 | if (i == no) |
| 132 | break; |
| 133 | } |
| 134 | } |
| 135 | return(cur); |
| 136 | } |
| 137 | |
| 138 | /************************************************************************ |
| 139 | * * |
| 140 | * Handling of XPointer specific types * |
| 141 | * * |
| 142 | ************************************************************************/ |
| 143 | |
| 144 | /** |
| 145 | * xmlXPtrCmpPoints: |
| 146 | * @node1: the first node |
| 147 | * @index1: the first index |
| 148 | * @node2: the second node |
| 149 | * @index2: the second index |
| 150 | * |
| 151 | * Compare two points w.r.t document order |
| 152 | * |
| 153 | * Returns -2 in case of error 1 if first point < second point, 0 if |
| 154 | * that's the same point, -1 otherwise |
| 155 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 156 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 157 | xmlXPtrCmpPoints(xmlNodePtr node1, int index1, xmlNodePtr node2, int index2) { |
| 158 | if ((node1 == NULL) || (node2 == NULL)) |
| 159 | return(-2); |
| 160 | /* |
| 161 | * a couple of optimizations which will avoid computations in most cases |
| 162 | */ |
| 163 | if (node1 == node2) { |
| 164 | if (index1 < index2) |
| 165 | return(1); |
| 166 | if (index1 > index2) |
| 167 | return(-1); |
| 168 | return(0); |
| 169 | } |
| 170 | return(xmlXPathCmpNodes(node1, node2)); |
| 171 | } |
| 172 | |
| 173 | /** |
| 174 | * xmlXPtrNewPoint: |
| 175 | * @node: the xmlNodePtr |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 176 | * @indx: the indx within the node |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 177 | * |
| 178 | * Create a new xmlXPathObjectPtr of type point |
| 179 | * |
| 180 | * Returns the newly created object. |
| 181 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 182 | static xmlXPathObjectPtr |
| 183 | xmlXPtrNewPoint(xmlNodePtr node, int indx) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 184 | xmlXPathObjectPtr ret; |
| 185 | |
| 186 | if (node == NULL) |
| 187 | return(NULL); |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 188 | if (indx < 0) |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 189 | return(NULL); |
| 190 | |
| 191 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 192 | if (ret == NULL) { |
| 193 | xmlGenericError(xmlGenericErrorContext, |
| 194 | "xmlXPtrNewPoint: out of memory\n"); |
| 195 | return(NULL); |
| 196 | } |
| 197 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 198 | ret->type = XPATH_POINT; |
| 199 | ret->user = (void *) node; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 200 | ret->index = indx; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 201 | return(ret); |
| 202 | } |
| 203 | |
| 204 | /** |
| 205 | * xmlXPtrRangeCheckOrder: |
| 206 | * @range: an object range |
| 207 | * |
| 208 | * Make sure the points in the range are in the right order |
| 209 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 210 | static void |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 211 | xmlXPtrRangeCheckOrder(xmlXPathObjectPtr range) { |
| 212 | int tmp; |
| 213 | xmlNodePtr tmp2; |
| 214 | if (range == NULL) |
| 215 | return; |
| 216 | if (range->type != XPATH_RANGE) |
| 217 | return; |
| 218 | if (range->user2 == NULL) |
| 219 | return; |
| 220 | tmp = xmlXPtrCmpPoints(range->user, range->index, |
| 221 | range->user2, range->index2); |
| 222 | if (tmp == -1) { |
| 223 | tmp2 = range->user; |
| 224 | range->user = range->user2; |
| 225 | range->user2 = tmp2; |
| 226 | tmp = range->index; |
| 227 | range->index = range->index2; |
| 228 | range->index2 = tmp; |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | /** |
| 233 | * xmlXPtrRangesEqual: |
| 234 | * @range1: the first range |
| 235 | * @range2: the second range |
| 236 | * |
| 237 | * Compare two ranges |
| 238 | * |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 239 | * Returns 1 if equal, 0 otherwise |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 240 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 241 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 242 | xmlXPtrRangesEqual(xmlXPathObjectPtr range1, xmlXPathObjectPtr range2) { |
| 243 | if (range1 == range2) |
| 244 | return(1); |
| 245 | if ((range1 == NULL) || (range2 == NULL)) |
| 246 | return(0); |
| 247 | if (range1->type != range2->type) |
| 248 | return(0); |
| 249 | if (range1->type != XPATH_RANGE) |
| 250 | return(0); |
| 251 | if (range1->user != range2->user) |
| 252 | return(0); |
| 253 | if (range1->index != range2->index) |
| 254 | return(0); |
| 255 | if (range1->user2 != range2->user2) |
| 256 | return(0); |
| 257 | if (range1->index2 != range2->index2) |
| 258 | return(0); |
| 259 | return(1); |
| 260 | } |
| 261 | |
| 262 | /** |
| 263 | * xmlXPtrNewRange: |
| 264 | * @start: the starting node |
| 265 | * @startindex: the start index |
| 266 | * @end: the ending point |
| 267 | * @endindex: the ending index |
| 268 | * |
| 269 | * Create a new xmlXPathObjectPtr of type range |
| 270 | * |
| 271 | * Returns the newly created object. |
| 272 | */ |
| 273 | xmlXPathObjectPtr |
| 274 | xmlXPtrNewRange(xmlNodePtr start, int startindex, |
| 275 | xmlNodePtr end, int endindex) { |
| 276 | xmlXPathObjectPtr ret; |
| 277 | |
| 278 | if (start == NULL) |
| 279 | return(NULL); |
| 280 | if (end == NULL) |
| 281 | return(NULL); |
| 282 | if (startindex < 0) |
| 283 | return(NULL); |
| 284 | if (endindex < 0) |
| 285 | return(NULL); |
| 286 | |
| 287 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 288 | if (ret == NULL) { |
| 289 | xmlGenericError(xmlGenericErrorContext, |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 290 | "xmlXPtrNewRange: out of memory\n"); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 291 | return(NULL); |
| 292 | } |
| 293 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 294 | ret->type = XPATH_RANGE; |
| 295 | ret->user = start; |
| 296 | ret->index = startindex; |
| 297 | ret->user2 = end; |
| 298 | ret->index2 = endindex; |
| 299 | xmlXPtrRangeCheckOrder(ret); |
| 300 | return(ret); |
| 301 | } |
| 302 | |
| 303 | /** |
| 304 | * xmlXPtrNewRangePoints: |
| 305 | * @start: the starting point |
| 306 | * @end: the ending point |
| 307 | * |
| 308 | * Create a new xmlXPathObjectPtr of type range using 2 Points |
| 309 | * |
| 310 | * Returns the newly created object. |
| 311 | */ |
| 312 | xmlXPathObjectPtr |
| 313 | xmlXPtrNewRangePoints(xmlXPathObjectPtr start, xmlXPathObjectPtr end) { |
| 314 | xmlXPathObjectPtr ret; |
| 315 | |
| 316 | if (start == NULL) |
| 317 | return(NULL); |
| 318 | if (end == NULL) |
| 319 | return(NULL); |
| 320 | if (start->type != XPATH_POINT) |
| 321 | return(NULL); |
| 322 | if (end->type != XPATH_POINT) |
| 323 | return(NULL); |
| 324 | |
| 325 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 326 | if (ret == NULL) { |
| 327 | xmlGenericError(xmlGenericErrorContext, |
| 328 | "xmlXPtrNewRangePoints: out of memory\n"); |
| 329 | return(NULL); |
| 330 | } |
| 331 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 332 | ret->type = XPATH_RANGE; |
| 333 | ret->user = start->user; |
| 334 | ret->index = start->index; |
| 335 | ret->user2 = end->user; |
| 336 | ret->index2 = end->index; |
| 337 | xmlXPtrRangeCheckOrder(ret); |
| 338 | return(ret); |
| 339 | } |
| 340 | |
| 341 | /** |
| 342 | * xmlXPtrNewRangePointNode: |
| 343 | * @start: the starting point |
| 344 | * @end: the ending node |
| 345 | * |
| 346 | * Create a new xmlXPathObjectPtr of type range from a point to a node |
| 347 | * |
| 348 | * Returns the newly created object. |
| 349 | */ |
| 350 | xmlXPathObjectPtr |
| 351 | xmlXPtrNewRangePointNode(xmlXPathObjectPtr start, xmlNodePtr end) { |
| 352 | xmlXPathObjectPtr ret; |
| 353 | |
| 354 | if (start == NULL) |
| 355 | return(NULL); |
| 356 | if (end == NULL) |
| 357 | return(NULL); |
| 358 | if (start->type != XPATH_POINT) |
| 359 | return(NULL); |
| 360 | |
| 361 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 362 | if (ret == NULL) { |
| 363 | xmlGenericError(xmlGenericErrorContext, |
| 364 | "xmlXPtrNewRangePointNode: out of memory\n"); |
| 365 | return(NULL); |
| 366 | } |
| 367 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 368 | ret->type = XPATH_RANGE; |
| 369 | ret->user = start->user; |
| 370 | ret->index = start->index; |
| 371 | ret->user2 = end; |
| 372 | ret->index2 = -1; |
| 373 | xmlXPtrRangeCheckOrder(ret); |
| 374 | return(ret); |
| 375 | } |
| 376 | |
| 377 | /** |
| 378 | * xmlXPtrNewRangeNodePoint: |
| 379 | * @start: the starting node |
| 380 | * @end: the ending point |
| 381 | * |
| 382 | * Create a new xmlXPathObjectPtr of type range from a node to a point |
| 383 | * |
| 384 | * Returns the newly created object. |
| 385 | */ |
| 386 | xmlXPathObjectPtr |
| 387 | xmlXPtrNewRangeNodePoint(xmlNodePtr start, xmlXPathObjectPtr end) { |
| 388 | xmlXPathObjectPtr ret; |
| 389 | |
| 390 | if (start == NULL) |
| 391 | return(NULL); |
| 392 | if (end == NULL) |
| 393 | return(NULL); |
| 394 | if (start->type != XPATH_POINT) |
| 395 | return(NULL); |
| 396 | if (end->type != XPATH_POINT) |
| 397 | return(NULL); |
| 398 | |
| 399 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 400 | if (ret == NULL) { |
| 401 | xmlGenericError(xmlGenericErrorContext, |
| 402 | "xmlXPtrNewRangeNodePoint: out of memory\n"); |
| 403 | return(NULL); |
| 404 | } |
| 405 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 406 | ret->type = XPATH_RANGE; |
| 407 | ret->user = start; |
| 408 | ret->index = -1; |
| 409 | ret->user2 = end->user; |
| 410 | ret->index2 = end->index; |
| 411 | xmlXPtrRangeCheckOrder(ret); |
| 412 | return(ret); |
| 413 | } |
| 414 | |
| 415 | /** |
| 416 | * xmlXPtrNewRangeNodes: |
| 417 | * @start: the starting node |
| 418 | * @end: the ending node |
| 419 | * |
| 420 | * Create a new xmlXPathObjectPtr of type range using 2 nodes |
| 421 | * |
| 422 | * Returns the newly created object. |
| 423 | */ |
| 424 | xmlXPathObjectPtr |
| 425 | xmlXPtrNewRangeNodes(xmlNodePtr start, xmlNodePtr end) { |
| 426 | xmlXPathObjectPtr ret; |
| 427 | |
| 428 | if (start == NULL) |
| 429 | return(NULL); |
| 430 | if (end == NULL) |
| 431 | return(NULL); |
| 432 | |
| 433 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 434 | if (ret == NULL) { |
| 435 | xmlGenericError(xmlGenericErrorContext, |
| 436 | "xmlXPtrNewRangeNodes: out of memory\n"); |
| 437 | return(NULL); |
| 438 | } |
| 439 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 440 | ret->type = XPATH_RANGE; |
| 441 | ret->user = start; |
| 442 | ret->index = -1; |
| 443 | ret->user2 = end; |
| 444 | ret->index2 = -1; |
| 445 | xmlXPtrRangeCheckOrder(ret); |
| 446 | return(ret); |
| 447 | } |
| 448 | |
| 449 | /** |
| 450 | * xmlXPtrNewCollapsedRange: |
| 451 | * @start: the starting and ending node |
| 452 | * |
| 453 | * Create a new xmlXPathObjectPtr of type range using a single nodes |
| 454 | * |
| 455 | * Returns the newly created object. |
| 456 | */ |
| 457 | xmlXPathObjectPtr |
| 458 | xmlXPtrNewCollapsedRange(xmlNodePtr start) { |
| 459 | xmlXPathObjectPtr ret; |
| 460 | |
| 461 | if (start == NULL) |
| 462 | return(NULL); |
| 463 | |
| 464 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 465 | if (ret == NULL) { |
| 466 | xmlGenericError(xmlGenericErrorContext, |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 467 | "xmlXPtrNewCollapsedRange: out of memory\n"); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 468 | return(NULL); |
| 469 | } |
| 470 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 471 | ret->type = XPATH_RANGE; |
| 472 | ret->user = start; |
| 473 | ret->index = -1; |
| 474 | ret->user2 = NULL; |
| 475 | ret->index2 = -1; |
| 476 | return(ret); |
| 477 | } |
| 478 | |
| 479 | /** |
| 480 | * xmlXPtrNewRangeNodeObject: |
| 481 | * @start: the starting node |
| 482 | * @end: the ending object |
| 483 | * |
| 484 | * Create a new xmlXPathObjectPtr of type range from a not to an object |
| 485 | * |
| 486 | * Returns the newly created object. |
| 487 | */ |
| 488 | xmlXPathObjectPtr |
| 489 | xmlXPtrNewRangeNodeObject(xmlNodePtr start, xmlXPathObjectPtr end) { |
| 490 | xmlXPathObjectPtr ret; |
| 491 | |
| 492 | if (start == NULL) |
| 493 | return(NULL); |
| 494 | if (end == NULL) |
| 495 | return(NULL); |
| 496 | switch (end->type) { |
| 497 | case XPATH_POINT: |
| 498 | break; |
| 499 | case XPATH_NODESET: |
| 500 | /* |
| 501 | * Empty set ... |
| 502 | */ |
| 503 | if (end->nodesetval->nodeNr <= 0) |
| 504 | return(NULL); |
| 505 | break; |
| 506 | default: |
| 507 | TODO |
| 508 | return(NULL); |
| 509 | } |
| 510 | |
| 511 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 512 | if (ret == NULL) { |
| 513 | xmlGenericError(xmlGenericErrorContext, |
| 514 | "xmlXPtrNewRangeNodeObject: out of memory\n"); |
| 515 | return(NULL); |
| 516 | } |
| 517 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 518 | ret->type = XPATH_RANGE; |
| 519 | ret->user = start; |
| 520 | ret->index = -1; |
| 521 | switch (end->type) { |
| 522 | case XPATH_POINT: |
| 523 | ret->user2 = end->user; |
| 524 | ret->index2 = end->index; |
| 525 | case XPATH_NODESET: { |
| 526 | ret->user2 = end->nodesetval->nodeTab[end->nodesetval->nodeNr - 1]; |
| 527 | ret->index2 = -1; |
| 528 | break; |
| 529 | } |
| 530 | default: |
| 531 | STRANGE |
| 532 | return(NULL); |
| 533 | } |
| 534 | xmlXPtrRangeCheckOrder(ret); |
| 535 | return(ret); |
| 536 | } |
| 537 | |
| 538 | #define XML_RANGESET_DEFAULT 10 |
| 539 | |
| 540 | /** |
| 541 | * xmlXPtrLocationSetCreate: |
| 542 | * @val: an initial xmlXPathObjectPtr, or NULL |
| 543 | * |
| 544 | * Create a new xmlLocationSetPtr of type double and of value @val |
| 545 | * |
| 546 | * Returns the newly created object. |
| 547 | */ |
| 548 | xmlLocationSetPtr |
| 549 | xmlXPtrLocationSetCreate(xmlXPathObjectPtr val) { |
| 550 | xmlLocationSetPtr ret; |
| 551 | |
| 552 | ret = (xmlLocationSetPtr) xmlMalloc(sizeof(xmlLocationSet)); |
| 553 | if (ret == NULL) { |
| 554 | xmlGenericError(xmlGenericErrorContext, |
| 555 | "xmlXPtrLocationSetCreate: out of memory\n"); |
| 556 | return(NULL); |
| 557 | } |
| 558 | memset(ret, 0 , (size_t) sizeof(xmlLocationSet)); |
| 559 | if (val != NULL) { |
| 560 | ret->locTab = (xmlXPathObjectPtr *) xmlMalloc(XML_RANGESET_DEFAULT * |
| 561 | sizeof(xmlXPathObjectPtr)); |
| 562 | if (ret->locTab == NULL) { |
| 563 | xmlGenericError(xmlGenericErrorContext, |
| 564 | "xmlXPtrLocationSetCreate: out of memory\n"); |
| 565 | return(NULL); |
| 566 | } |
| 567 | memset(ret->locTab, 0 , |
| 568 | XML_RANGESET_DEFAULT * (size_t) sizeof(xmlXPathObjectPtr)); |
| 569 | ret->locMax = XML_RANGESET_DEFAULT; |
| 570 | ret->locTab[ret->locNr++] = val; |
| 571 | } |
| 572 | return(ret); |
| 573 | } |
| 574 | |
| 575 | /** |
| 576 | * xmlXPtrLocationSetAdd: |
| 577 | * @cur: the initial range set |
| 578 | * @val: a new xmlXPathObjectPtr |
| 579 | * |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 580 | * add a new xmlXPathObjectPtr to an existing LocationSet |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 581 | * If the location already exist in the set @val is freed. |
| 582 | */ |
| 583 | void |
| 584 | xmlXPtrLocationSetAdd(xmlLocationSetPtr cur, xmlXPathObjectPtr val) { |
| 585 | int i; |
| 586 | |
| 587 | if (val == NULL) return; |
| 588 | |
| 589 | /* |
| 590 | * check against doublons |
| 591 | */ |
| 592 | for (i = 0;i < cur->locNr;i++) { |
| 593 | if (xmlXPtrRangesEqual(cur->locTab[i], val)) { |
| 594 | xmlXPathFreeObject(val); |
| 595 | return; |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | /* |
| 600 | * grow the locTab if needed |
| 601 | */ |
| 602 | if (cur->locMax == 0) { |
| 603 | cur->locTab = (xmlXPathObjectPtr *) xmlMalloc(XML_RANGESET_DEFAULT * |
| 604 | sizeof(xmlXPathObjectPtr)); |
| 605 | if (cur->locTab == NULL) { |
| 606 | xmlGenericError(xmlGenericErrorContext, |
| 607 | "xmlXPtrLocationSetAdd: out of memory\n"); |
| 608 | return; |
| 609 | } |
| 610 | memset(cur->locTab, 0 , |
| 611 | XML_RANGESET_DEFAULT * (size_t) sizeof(xmlXPathObjectPtr)); |
| 612 | cur->locMax = XML_RANGESET_DEFAULT; |
| 613 | } else if (cur->locNr == cur->locMax) { |
| 614 | xmlXPathObjectPtr *temp; |
| 615 | |
| 616 | cur->locMax *= 2; |
| 617 | temp = (xmlXPathObjectPtr *) xmlRealloc(cur->locTab, cur->locMax * |
| 618 | sizeof(xmlXPathObjectPtr)); |
| 619 | if (temp == NULL) { |
| 620 | xmlGenericError(xmlGenericErrorContext, |
| 621 | "xmlXPtrLocationSetAdd: out of memory\n"); |
| 622 | return; |
| 623 | } |
| 624 | cur->locTab = temp; |
| 625 | } |
| 626 | cur->locTab[cur->locNr++] = val; |
| 627 | } |
| 628 | |
| 629 | /** |
| 630 | * xmlXPtrLocationSetMerge: |
| 631 | * @val1: the first LocationSet |
| 632 | * @val2: the second LocationSet |
| 633 | * |
| 634 | * Merges two rangesets, all ranges from @val2 are added to @val1 |
| 635 | * |
| 636 | * Returns val1 once extended or NULL in case of error. |
| 637 | */ |
| 638 | xmlLocationSetPtr |
| 639 | xmlXPtrLocationSetMerge(xmlLocationSetPtr val1, xmlLocationSetPtr val2) { |
| 640 | int i; |
| 641 | |
| 642 | if (val1 == NULL) return(NULL); |
| 643 | if (val2 == NULL) return(val1); |
| 644 | |
| 645 | /* |
| 646 | * !!!!! this can be optimized a lot, knowing that both |
| 647 | * val1 and val2 already have unicity of their values. |
| 648 | */ |
| 649 | |
| 650 | for (i = 0;i < val2->locNr;i++) |
| 651 | xmlXPtrLocationSetAdd(val1, val2->locTab[i]); |
| 652 | |
| 653 | return(val1); |
| 654 | } |
| 655 | |
| 656 | /** |
| 657 | * xmlXPtrLocationSetDel: |
| 658 | * @cur: the initial range set |
| 659 | * @val: an xmlXPathObjectPtr |
| 660 | * |
| 661 | * Removes an xmlXPathObjectPtr from an existing LocationSet |
| 662 | */ |
| 663 | void |
| 664 | xmlXPtrLocationSetDel(xmlLocationSetPtr cur, xmlXPathObjectPtr val) { |
| 665 | int i; |
| 666 | |
| 667 | if (cur == NULL) return; |
| 668 | if (val == NULL) return; |
| 669 | |
| 670 | /* |
| 671 | * check against doublons |
| 672 | */ |
| 673 | for (i = 0;i < cur->locNr;i++) |
| 674 | if (cur->locTab[i] == val) break; |
| 675 | |
| 676 | if (i >= cur->locNr) { |
| 677 | #ifdef DEBUG |
| 678 | xmlGenericError(xmlGenericErrorContext, |
Daniel Veillard | 913d6e0 | 2001-11-28 14:53:53 +0000 | [diff] [blame] | 679 | "xmlXPtrLocationSetDel: Range wasn't found in RangeList\n"); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 680 | #endif |
| 681 | return; |
| 682 | } |
| 683 | cur->locNr--; |
| 684 | for (;i < cur->locNr;i++) |
| 685 | cur->locTab[i] = cur->locTab[i + 1]; |
| 686 | cur->locTab[cur->locNr] = NULL; |
| 687 | } |
| 688 | |
| 689 | /** |
| 690 | * xmlXPtrLocationSetRemove: |
| 691 | * @cur: the initial range set |
| 692 | * @val: the index to remove |
| 693 | * |
| 694 | * Removes an entry from an existing LocationSet list. |
| 695 | */ |
| 696 | void |
| 697 | xmlXPtrLocationSetRemove(xmlLocationSetPtr cur, int val) { |
| 698 | if (cur == NULL) return; |
| 699 | if (val >= cur->locNr) return; |
| 700 | cur->locNr--; |
| 701 | for (;val < cur->locNr;val++) |
| 702 | cur->locTab[val] = cur->locTab[val + 1]; |
| 703 | cur->locTab[cur->locNr] = NULL; |
| 704 | } |
| 705 | |
| 706 | /** |
| 707 | * xmlXPtrFreeLocationSet: |
| 708 | * @obj: the xmlLocationSetPtr to free |
| 709 | * |
| 710 | * Free the LocationSet compound (not the actual ranges !). |
| 711 | */ |
| 712 | void |
| 713 | xmlXPtrFreeLocationSet(xmlLocationSetPtr obj) { |
| 714 | int i; |
| 715 | |
| 716 | if (obj == NULL) return; |
| 717 | if (obj->locTab != NULL) { |
| 718 | for (i = 0;i < obj->locNr; i++) { |
| 719 | xmlXPathFreeObject(obj->locTab[i]); |
| 720 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 721 | xmlFree(obj->locTab); |
| 722 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 723 | xmlFree(obj); |
| 724 | } |
| 725 | |
| 726 | /** |
| 727 | * xmlXPtrNewLocationSetNodes: |
| 728 | * @start: the start NodePtr value |
| 729 | * @end: the end NodePtr value or NULL |
| 730 | * |
| 731 | * Create a new xmlXPathObjectPtr of type LocationSet and initialize |
| 732 | * it with the single range made of the two nodes @start and @end |
| 733 | * |
| 734 | * Returns the newly created object. |
| 735 | */ |
| 736 | xmlXPathObjectPtr |
| 737 | xmlXPtrNewLocationSetNodes(xmlNodePtr start, xmlNodePtr end) { |
| 738 | xmlXPathObjectPtr ret; |
| 739 | |
| 740 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 741 | if (ret == NULL) { |
| 742 | xmlGenericError(xmlGenericErrorContext, |
| 743 | "xmlXPtrNewLocationSetNodes: out of memory\n"); |
| 744 | return(NULL); |
| 745 | } |
| 746 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 747 | ret->type = XPATH_LOCATIONSET; |
| 748 | if (end == NULL) |
| 749 | ret->user = xmlXPtrLocationSetCreate(xmlXPtrNewCollapsedRange(start)); |
| 750 | else |
| 751 | ret->user = xmlXPtrLocationSetCreate(xmlXPtrNewRangeNodes(start,end)); |
| 752 | return(ret); |
| 753 | } |
| 754 | |
| 755 | /** |
| 756 | * xmlXPtrNewLocationSetNodeSet: |
| 757 | * @set: a node set |
| 758 | * |
| 759 | * Create a new xmlXPathObjectPtr of type LocationSet and initialize |
| 760 | * it with all the nodes from @set |
| 761 | * |
| 762 | * Returns the newly created object. |
| 763 | */ |
| 764 | xmlXPathObjectPtr |
| 765 | xmlXPtrNewLocationSetNodeSet(xmlNodeSetPtr set) { |
| 766 | xmlXPathObjectPtr ret; |
| 767 | |
| 768 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 769 | if (ret == NULL) { |
| 770 | xmlGenericError(xmlGenericErrorContext, |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 771 | "xmlXPtrNewLocationSetNodeSet: out of memory\n"); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 772 | return(NULL); |
| 773 | } |
| 774 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 775 | ret->type = XPATH_LOCATIONSET; |
| 776 | if (set != NULL) { |
| 777 | int i; |
| 778 | xmlLocationSetPtr newset; |
| 779 | |
| 780 | newset = xmlXPtrLocationSetCreate(NULL); |
| 781 | if (newset == NULL) |
| 782 | return(ret); |
| 783 | |
| 784 | for (i = 0;i < set->nodeNr;i++) |
| 785 | xmlXPtrLocationSetAdd(newset, |
| 786 | xmlXPtrNewCollapsedRange(set->nodeTab[i])); |
| 787 | |
| 788 | ret->user = (void *) newset; |
| 789 | } |
| 790 | return(ret); |
| 791 | } |
| 792 | |
| 793 | /** |
| 794 | * xmlXPtrWrapLocationSet: |
| 795 | * @val: the LocationSet value |
| 796 | * |
| 797 | * Wrap the LocationSet @val in a new xmlXPathObjectPtr |
| 798 | * |
| 799 | * Returns the newly created object. |
| 800 | */ |
| 801 | xmlXPathObjectPtr |
| 802 | xmlXPtrWrapLocationSet(xmlLocationSetPtr val) { |
| 803 | xmlXPathObjectPtr ret; |
| 804 | |
| 805 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 806 | if (ret == NULL) { |
| 807 | xmlGenericError(xmlGenericErrorContext, |
| 808 | "xmlXPtrWrapLocationSet: out of memory\n"); |
| 809 | return(NULL); |
| 810 | } |
| 811 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 812 | ret->type = XPATH_LOCATIONSET; |
| 813 | ret->user = (void *) val; |
| 814 | return(ret); |
| 815 | } |
| 816 | |
| 817 | /************************************************************************ |
| 818 | * * |
| 819 | * The parser * |
| 820 | * * |
| 821 | ************************************************************************/ |
| 822 | |
Daniel Veillard | 9a237c9 | 2003-02-13 15:52:58 +0000 | [diff] [blame] | 823 | static void xmlXPtrEvalChildSeq(xmlXPathParserContextPtr ctxt, xmlChar *name); |
| 824 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 825 | /* |
| 826 | * Macros for accessing the content. Those should be used only by the parser, |
| 827 | * and not exported. |
| 828 | * |
| 829 | * Dirty macros, i.e. one need to make assumption on the context to use them |
| 830 | * |
| 831 | * CUR_PTR return the current pointer to the xmlChar to be parsed. |
| 832 | * CUR returns the current xmlChar value, i.e. a 8 bit value |
| 833 | * in ISO-Latin or UTF-8. |
| 834 | * This should be used internally by the parser |
| 835 | * only to compare to ASCII values otherwise it would break when |
| 836 | * running with UTF-8 encoding. |
| 837 | * NXT(n) returns the n'th next xmlChar. Same as CUR is should be used only |
| 838 | * to compare on ASCII based substring. |
| 839 | * SKIP(n) Skip n xmlChar, and must also be used only to skip ASCII defined |
| 840 | * strings within the parser. |
| 841 | * CURRENT Returns the current char value, with the full decoding of |
| 842 | * UTF-8 if we are using this mode. It returns an int. |
| 843 | * NEXT Skip to the next character, this does the proper decoding |
| 844 | * in UTF-8 mode. It also pop-up unfinished entities on the fly. |
| 845 | * It returns the pointer to the current xmlChar. |
| 846 | */ |
| 847 | |
| 848 | #define CUR (*ctxt->cur) |
| 849 | #define SKIP(val) ctxt->cur += (val) |
| 850 | #define NXT(val) ctxt->cur[(val)] |
| 851 | #define CUR_PTR ctxt->cur |
| 852 | |
| 853 | #define SKIP_BLANKS \ |
| 854 | while (IS_BLANK(*(ctxt->cur))) NEXT |
| 855 | |
| 856 | #define CURRENT (*ctxt->cur) |
| 857 | #define NEXT ((*ctxt->cur) ? ctxt->cur++: ctxt->cur) |
| 858 | |
| 859 | /* |
| 860 | * xmlXPtrGetChildNo: |
| 861 | * @ctxt: the XPointer Parser context |
| 862 | * @index: the child number |
| 863 | * |
| 864 | * Move the current node of the nodeset on the stack to the |
| 865 | * given child if found |
| 866 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 867 | static void |
| 868 | xmlXPtrGetChildNo(xmlXPathParserContextPtr ctxt, int indx) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 869 | xmlNodePtr cur = NULL; |
| 870 | xmlXPathObjectPtr obj; |
| 871 | xmlNodeSetPtr oldset; |
| 872 | |
| 873 | CHECK_TYPE(XPATH_NODESET); |
| 874 | obj = valuePop(ctxt); |
| 875 | oldset = obj->nodesetval; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 876 | if ((indx <= 0) || (oldset == NULL) || (oldset->nodeNr != 1)) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 877 | xmlXPathFreeObject(obj); |
| 878 | valuePush(ctxt, xmlXPathNewNodeSet(NULL)); |
| 879 | return; |
| 880 | } |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 881 | cur = xmlXPtrGetNthChild(oldset->nodeTab[0], indx); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 882 | if (cur == NULL) { |
| 883 | xmlXPathFreeObject(obj); |
| 884 | valuePush(ctxt, xmlXPathNewNodeSet(NULL)); |
| 885 | return; |
| 886 | } |
| 887 | oldset->nodeTab[0] = cur; |
| 888 | valuePush(ctxt, obj); |
| 889 | } |
| 890 | |
| 891 | /** |
| 892 | * xmlXPtrEvalXPtrPart: |
| 893 | * @ctxt: the XPointer Parser context |
| 894 | * @name: the preparsed Scheme for the XPtrPart |
| 895 | * |
| 896 | * XPtrPart ::= 'xpointer' '(' XPtrExpr ')' |
| 897 | * | Scheme '(' SchemeSpecificExpr ')' |
| 898 | * |
| 899 | * Scheme ::= NCName - 'xpointer' [VC: Non-XPointer schemes] |
| 900 | * |
| 901 | * SchemeSpecificExpr ::= StringWithBalancedParens |
| 902 | * |
| 903 | * StringWithBalancedParens ::= |
| 904 | * [^()]* ('(' StringWithBalancedParens ')' [^()]*)* |
| 905 | * [VC: Parenthesis escaping] |
| 906 | * |
| 907 | * XPtrExpr ::= Expr [VC: Parenthesis escaping] |
| 908 | * |
| 909 | * VC: Parenthesis escaping: |
| 910 | * The end of an XPointer part is signaled by the right parenthesis ")" |
| 911 | * character that is balanced with the left parenthesis "(" character |
| 912 | * that began the part. Any unbalanced parenthesis character inside the |
| 913 | * expression, even within literals, must be escaped with a circumflex (^) |
| 914 | * character preceding it. If the expression contains any literal |
| 915 | * occurrences of the circumflex, each must be escaped with an additional |
| 916 | * circumflex (that is, ^^). If the unescaped parentheses in the expression |
| 917 | * are not balanced, a syntax error results. |
| 918 | * |
| 919 | * Parse and evaluate an XPtrPart. Basically it generates the unescaped |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 920 | * 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] | 921 | * |
| 922 | * TODO: there is no new scheme registration mechanism |
| 923 | */ |
| 924 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 925 | static void |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 926 | xmlXPtrEvalXPtrPart(xmlXPathParserContextPtr ctxt, xmlChar *name) { |
| 927 | xmlChar *buffer, *cur; |
| 928 | int len; |
| 929 | int level; |
| 930 | |
| 931 | if (name == NULL) |
| 932 | name = xmlXPathParseName(ctxt); |
| 933 | if (name == NULL) |
| 934 | XP_ERROR(XPATH_EXPR_ERROR); |
| 935 | |
| 936 | if (CUR != '(') |
| 937 | XP_ERROR(XPATH_EXPR_ERROR); |
| 938 | NEXT; |
| 939 | level = 1; |
| 940 | |
| 941 | len = xmlStrlen(ctxt->cur); |
| 942 | len++; |
Daniel Veillard | 3c908dc | 2003-04-19 00:07:51 +0000 | [diff] [blame] | 943 | buffer = (xmlChar *) xmlMallocAtomic(len * sizeof (xmlChar)); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 944 | if (buffer == NULL) { |
| 945 | xmlGenericError(xmlGenericErrorContext, |
| 946 | "xmlXPtrEvalXPtrPart: out of memory\n"); |
| 947 | return; |
| 948 | } |
| 949 | |
| 950 | cur = buffer; |
| 951 | while (CUR != 0) { |
| 952 | if (CUR == ')') { |
| 953 | level--; |
| 954 | if (level == 0) { |
| 955 | NEXT; |
| 956 | break; |
| 957 | } |
| 958 | *cur++ = CUR; |
| 959 | } else if (CUR == '(') { |
| 960 | level++; |
| 961 | *cur++ = CUR; |
| 962 | } else if (CUR == '^') { |
| 963 | NEXT; |
| 964 | if ((CUR == ')') || (CUR == '(') || (CUR == '^')) { |
| 965 | *cur++ = CUR; |
| 966 | } else { |
| 967 | *cur++ = '^'; |
| 968 | *cur++ = CUR; |
| 969 | } |
| 970 | } else { |
| 971 | *cur++ = CUR; |
| 972 | } |
| 973 | NEXT; |
| 974 | } |
| 975 | *cur = 0; |
| 976 | |
| 977 | if ((level != 0) && (CUR == 0)) { |
| 978 | xmlFree(buffer); |
| 979 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 980 | } |
| 981 | |
| 982 | if (xmlStrEqual(name, (xmlChar *) "xpointer")) { |
| 983 | const xmlChar *left = CUR_PTR; |
| 984 | |
| 985 | CUR_PTR = buffer; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 986 | xmlXPathEvalExpr(ctxt); |
| 987 | CUR_PTR=left; |
Daniel Veillard | 9a237c9 | 2003-02-13 15:52:58 +0000 | [diff] [blame] | 988 | } else if (xmlStrEqual(name, (xmlChar *) "element")) { |
| 989 | const xmlChar *left = CUR_PTR; |
| 990 | xmlChar *name2; |
| 991 | |
| 992 | CUR_PTR = buffer; |
| 993 | if (buffer[0] == '/') { |
| 994 | xmlXPathRoot(ctxt); |
| 995 | xmlXPtrEvalChildSeq(ctxt, NULL); |
| 996 | } else { |
| 997 | name2 = xmlXPathParseName(ctxt); |
| 998 | if (name2 == NULL) { |
| 999 | CUR_PTR = left; |
| 1000 | xmlFree(buffer); |
| 1001 | XP_ERROR(XPATH_EXPR_ERROR); |
| 1002 | } |
| 1003 | xmlXPtrEvalChildSeq(ctxt, name2); |
| 1004 | } |
| 1005 | CUR_PTR = left; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1006 | #ifdef XPTR_XMLNS_SCHEME |
| 1007 | } else if (xmlStrEqual(name, (xmlChar *) "xmlns")) { |
| 1008 | const xmlChar *left = CUR_PTR; |
| 1009 | xmlChar *prefix; |
| 1010 | xmlChar *URI; |
| 1011 | xmlURIPtr value; |
| 1012 | |
| 1013 | CUR_PTR = buffer; |
| 1014 | prefix = xmlXPathParseNCName(ctxt); |
| 1015 | if (prefix == NULL) { |
| 1016 | xmlFree(buffer); |
| 1017 | xmlFree(name); |
| 1018 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 1019 | } |
| 1020 | SKIP_BLANKS; |
| 1021 | if (CUR != '=') { |
| 1022 | xmlFree(prefix); |
| 1023 | xmlFree(buffer); |
| 1024 | xmlFree(name); |
| 1025 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 1026 | } |
| 1027 | NEXT; |
| 1028 | SKIP_BLANKS; |
| 1029 | /* @@ check escaping in the XPointer WD */ |
| 1030 | |
| 1031 | value = xmlParseURI((const char *)ctxt->cur); |
| 1032 | if (value == NULL) { |
| 1033 | xmlFree(prefix); |
| 1034 | xmlFree(buffer); |
| 1035 | xmlFree(name); |
| 1036 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 1037 | } |
| 1038 | URI = xmlSaveUri(value); |
| 1039 | xmlFreeURI(value); |
| 1040 | if (URI == NULL) { |
| 1041 | xmlFree(prefix); |
| 1042 | xmlFree(buffer); |
| 1043 | xmlFree(name); |
| 1044 | XP_ERROR(XPATH_MEMORY_ERROR); |
| 1045 | } |
| 1046 | |
| 1047 | xmlXPathRegisterNs(ctxt->context, prefix, URI); |
| 1048 | CUR_PTR = left; |
Daniel Veillard | 56f21f2 | 2002-11-06 15:49:46 +0000 | [diff] [blame] | 1049 | xmlFree(URI); |
| 1050 | xmlFree(prefix); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1051 | #endif /* XPTR_XMLNS_SCHEME */ |
| 1052 | } else { |
| 1053 | xmlGenericError(xmlGenericErrorContext, |
| 1054 | "unsupported scheme '%s'\n", name); |
| 1055 | } |
| 1056 | xmlFree(buffer); |
| 1057 | xmlFree(name); |
| 1058 | } |
| 1059 | |
| 1060 | /** |
| 1061 | * xmlXPtrEvalFullXPtr: |
| 1062 | * @ctxt: the XPointer Parser context |
| 1063 | * @name: the preparsed Scheme for the first XPtrPart |
| 1064 | * |
| 1065 | * FullXPtr ::= XPtrPart (S? XPtrPart)* |
| 1066 | * |
| 1067 | * As the specs says: |
| 1068 | * ----------- |
| 1069 | * When multiple XPtrParts are provided, they must be evaluated in |
| 1070 | * left-to-right order. If evaluation of one part fails, the nexti |
| 1071 | * is evaluated. The following conditions cause XPointer part failure: |
| 1072 | * |
| 1073 | * - An unknown scheme |
| 1074 | * - A scheme that does not locate any sub-resource present in the resource |
| 1075 | * - A scheme that is not applicable to the media type of the resource |
| 1076 | * |
| 1077 | * The XPointer application must consume a failed XPointer part and |
| 1078 | * attempt to evaluate the next one, if any. The result of the first |
| 1079 | * XPointer part whose evaluation succeeds is taken to be the fragment |
| 1080 | * located by the XPointer as a whole. If all the parts fail, the result |
| 1081 | * for the XPointer as a whole is a sub-resource error. |
| 1082 | * ----------- |
| 1083 | * |
| 1084 | * 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] | 1085 | * expressions or other schemes. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1086 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1087 | static void |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1088 | xmlXPtrEvalFullXPtr(xmlXPathParserContextPtr ctxt, xmlChar *name) { |
| 1089 | if (name == NULL) |
| 1090 | name = xmlXPathParseName(ctxt); |
| 1091 | if (name == NULL) |
| 1092 | XP_ERROR(XPATH_EXPR_ERROR); |
| 1093 | while (name != NULL) { |
| 1094 | xmlXPtrEvalXPtrPart(ctxt, name); |
| 1095 | |
| 1096 | /* in case of syntax error, break here */ |
| 1097 | if (ctxt->error != XPATH_EXPRESSION_OK) |
| 1098 | return; |
| 1099 | |
| 1100 | /* |
| 1101 | * If the returned value is a non-empty nodeset |
| 1102 | * or location set, return here. |
| 1103 | */ |
| 1104 | if (ctxt->value != NULL) { |
| 1105 | xmlXPathObjectPtr obj = ctxt->value; |
| 1106 | |
| 1107 | switch (obj->type) { |
| 1108 | case XPATH_LOCATIONSET: { |
| 1109 | xmlLocationSetPtr loc = ctxt->value->user; |
| 1110 | if ((loc != NULL) && (loc->locNr > 0)) |
| 1111 | return; |
| 1112 | break; |
| 1113 | } |
| 1114 | case XPATH_NODESET: { |
| 1115 | xmlNodeSetPtr loc = ctxt->value->nodesetval; |
| 1116 | if ((loc != NULL) && (loc->nodeNr > 0)) |
| 1117 | return; |
| 1118 | break; |
| 1119 | } |
| 1120 | default: |
| 1121 | break; |
| 1122 | } |
| 1123 | |
| 1124 | /* |
| 1125 | * Evaluating to improper values is equivalent to |
| 1126 | * a sub-resource error, clean-up the stack |
| 1127 | */ |
| 1128 | do { |
| 1129 | obj = valuePop(ctxt); |
| 1130 | if (obj != NULL) { |
| 1131 | xmlXPathFreeObject(obj); |
| 1132 | } |
| 1133 | } while (obj != NULL); |
| 1134 | } |
| 1135 | |
| 1136 | /* |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 1137 | * Is there another XPointer part. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1138 | */ |
| 1139 | SKIP_BLANKS; |
| 1140 | name = xmlXPathParseName(ctxt); |
| 1141 | } |
| 1142 | } |
| 1143 | |
| 1144 | /** |
| 1145 | * xmlXPtrEvalChildSeq: |
| 1146 | * @ctxt: the XPointer Parser context |
| 1147 | * @name: a possible ID name of the child sequence |
| 1148 | * |
| 1149 | * ChildSeq ::= '/1' ('/' [0-9]*)* |
| 1150 | * | Name ('/' [0-9]*)+ |
| 1151 | * |
| 1152 | * Parse and evaluate a Child Sequence. This routine also handle the |
| 1153 | * case of a Bare Name used to get a document ID. |
| 1154 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1155 | static void |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1156 | xmlXPtrEvalChildSeq(xmlXPathParserContextPtr ctxt, xmlChar *name) { |
| 1157 | /* |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 1158 | * XPointer don't allow by syntax to address in mutirooted trees |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1159 | * this might prove useful in some cases, warn about it. |
| 1160 | */ |
| 1161 | if ((name == NULL) && (CUR == '/') && (NXT(1) != '1')) { |
| 1162 | xmlGenericError(xmlGenericErrorContext, |
| 1163 | "warning: ChildSeq not starting by /1\n"); |
| 1164 | } |
| 1165 | |
| 1166 | if (name != NULL) { |
| 1167 | valuePush(ctxt, xmlXPathNewString(name)); |
| 1168 | xmlFree(name); |
| 1169 | xmlXPathIdFunction(ctxt, 1); |
| 1170 | CHECK_ERROR; |
| 1171 | } |
| 1172 | |
| 1173 | while (CUR == '/') { |
| 1174 | int child = 0; |
| 1175 | NEXT; |
| 1176 | |
| 1177 | while ((CUR >= '0') && (CUR <= '9')) { |
| 1178 | child = child * 10 + (CUR - '0'); |
| 1179 | NEXT; |
| 1180 | } |
| 1181 | xmlXPtrGetChildNo(ctxt, child); |
| 1182 | } |
| 1183 | } |
| 1184 | |
| 1185 | |
| 1186 | /** |
| 1187 | * xmlXPtrEvalXPointer: |
| 1188 | * @ctxt: the XPointer Parser context |
| 1189 | * |
| 1190 | * XPointer ::= Name |
| 1191 | * | ChildSeq |
| 1192 | * | FullXPtr |
| 1193 | * |
| 1194 | * Parse and evaluate an XPointer |
| 1195 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1196 | static void |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1197 | xmlXPtrEvalXPointer(xmlXPathParserContextPtr ctxt) { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 1198 | if (ctxt->valueTab == NULL) { |
| 1199 | /* Allocate the value stack */ |
| 1200 | ctxt->valueTab = (xmlXPathObjectPtr *) |
| 1201 | xmlMalloc(10 * sizeof(xmlXPathObjectPtr)); |
| 1202 | if (ctxt->valueTab == NULL) { |
| 1203 | xmlFree(ctxt); |
| 1204 | xmlGenericError(xmlGenericErrorContext, |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 1205 | "xmlXPathEvalXPointer: out of memory\n"); |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 1206 | return; |
| 1207 | } |
| 1208 | ctxt->valueNr = 0; |
| 1209 | ctxt->valueMax = 10; |
| 1210 | ctxt->value = NULL; |
| 1211 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1212 | SKIP_BLANKS; |
| 1213 | if (CUR == '/') { |
| 1214 | xmlXPathRoot(ctxt); |
| 1215 | xmlXPtrEvalChildSeq(ctxt, NULL); |
| 1216 | } else { |
| 1217 | xmlChar *name; |
| 1218 | |
| 1219 | name = xmlXPathParseName(ctxt); |
| 1220 | if (name == NULL) |
| 1221 | XP_ERROR(XPATH_EXPR_ERROR); |
| 1222 | if (CUR == '(') { |
| 1223 | xmlXPtrEvalFullXPtr(ctxt, name); |
| 1224 | /* Short evaluation */ |
| 1225 | return; |
| 1226 | } else { |
| 1227 | /* this handle both Bare Names and Child Sequences */ |
| 1228 | xmlXPtrEvalChildSeq(ctxt, name); |
| 1229 | } |
| 1230 | } |
| 1231 | SKIP_BLANKS; |
| 1232 | if (CUR != 0) |
| 1233 | XP_ERROR(XPATH_EXPR_ERROR); |
| 1234 | } |
| 1235 | |
| 1236 | |
| 1237 | /************************************************************************ |
| 1238 | * * |
| 1239 | * General routines * |
| 1240 | * * |
| 1241 | ************************************************************************/ |
| 1242 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1243 | void xmlXPtrStringRangeFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 1244 | void xmlXPtrStartPointFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 1245 | void xmlXPtrEndPointFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 1246 | void xmlXPtrHereFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 1247 | void xmlXPtrOriginFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 1248 | void xmlXPtrRangeInsideFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 1249 | void xmlXPtrRangeFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 1250 | |
| 1251 | /** |
| 1252 | * xmlXPtrNewContext: |
| 1253 | * @doc: the XML document |
| 1254 | * @here: the node that directly contains the XPointer being evaluated or NULL |
| 1255 | * @origin: the element from which a user or program initiated traversal of |
| 1256 | * the link, or NULL. |
| 1257 | * |
| 1258 | * Create a new XPointer context |
| 1259 | * |
| 1260 | * Returns the xmlXPathContext just allocated. |
| 1261 | */ |
| 1262 | xmlXPathContextPtr |
| 1263 | xmlXPtrNewContext(xmlDocPtr doc, xmlNodePtr here, xmlNodePtr origin) { |
| 1264 | xmlXPathContextPtr ret; |
| 1265 | |
| 1266 | ret = xmlXPathNewContext(doc); |
| 1267 | if (ret == NULL) |
| 1268 | return(ret); |
| 1269 | ret->xptr = 1; |
| 1270 | ret->here = here; |
| 1271 | ret->origin = origin; |
| 1272 | |
| 1273 | xmlXPathRegisterFunc(ret, (xmlChar *)"range-to", |
| 1274 | xmlXPtrRangeToFunction); |
| 1275 | xmlXPathRegisterFunc(ret, (xmlChar *)"range", |
| 1276 | xmlXPtrRangeFunction); |
| 1277 | xmlXPathRegisterFunc(ret, (xmlChar *)"range-inside", |
| 1278 | xmlXPtrRangeInsideFunction); |
| 1279 | xmlXPathRegisterFunc(ret, (xmlChar *)"string-range", |
| 1280 | xmlXPtrStringRangeFunction); |
| 1281 | xmlXPathRegisterFunc(ret, (xmlChar *)"start-point", |
| 1282 | xmlXPtrStartPointFunction); |
| 1283 | xmlXPathRegisterFunc(ret, (xmlChar *)"end-point", |
| 1284 | xmlXPtrEndPointFunction); |
| 1285 | xmlXPathRegisterFunc(ret, (xmlChar *)"here", |
| 1286 | xmlXPtrHereFunction); |
| 1287 | xmlXPathRegisterFunc(ret, (xmlChar *)" origin", |
| 1288 | xmlXPtrOriginFunction); |
| 1289 | |
| 1290 | return(ret); |
| 1291 | } |
| 1292 | |
| 1293 | /** |
| 1294 | * xmlXPtrEval: |
| 1295 | * @str: the XPointer expression |
| 1296 | * @ctx: the XPointer context |
| 1297 | * |
| 1298 | * Evaluate the XPath Location Path in the given context. |
| 1299 | * |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 1300 | * Returns the xmlXPathObjectPtr resulting from the evaluation or NULL. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1301 | * the caller has to free the object. |
| 1302 | */ |
| 1303 | xmlXPathObjectPtr |
| 1304 | xmlXPtrEval(const xmlChar *str, xmlXPathContextPtr ctx) { |
| 1305 | xmlXPathParserContextPtr ctxt; |
| 1306 | xmlXPathObjectPtr res = NULL, tmp; |
| 1307 | xmlXPathObjectPtr init = NULL; |
| 1308 | int stack = 0; |
| 1309 | |
| 1310 | xmlXPathInit(); |
| 1311 | |
| 1312 | if ((ctx == NULL) || (str == NULL)) |
| 1313 | return(NULL); |
| 1314 | |
| 1315 | ctxt = xmlXPathNewParserContext(str, ctx); |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 1316 | ctxt->xptr = 1; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1317 | xmlXPtrEvalXPointer(ctxt); |
| 1318 | |
| 1319 | if ((ctxt->value != NULL) && |
| 1320 | (ctxt->value->type != XPATH_NODESET) && |
| 1321 | (ctxt->value->type != XPATH_LOCATIONSET)) { |
| 1322 | xmlGenericError(xmlGenericErrorContext, |
| 1323 | "xmlXPtrEval: evaluation failed to return a node set\n"); |
| 1324 | } else { |
| 1325 | res = valuePop(ctxt); |
| 1326 | } |
| 1327 | |
| 1328 | do { |
| 1329 | tmp = valuePop(ctxt); |
| 1330 | if (tmp != NULL) { |
| 1331 | if (tmp != init) { |
| 1332 | if (tmp->type == XPATH_NODESET) { |
| 1333 | /* |
| 1334 | * Evaluation may push a root nodeset which is unused |
| 1335 | */ |
| 1336 | xmlNodeSetPtr set; |
| 1337 | set = tmp->nodesetval; |
| 1338 | if ((set->nodeNr != 1) || |
| 1339 | (set->nodeTab[0] != (xmlNodePtr) ctx->doc)) |
| 1340 | stack++; |
| 1341 | } else |
| 1342 | stack++; |
| 1343 | } |
| 1344 | xmlXPathFreeObject(tmp); |
| 1345 | } |
| 1346 | } while (tmp != NULL); |
| 1347 | if (stack != 0) { |
| 1348 | xmlGenericError(xmlGenericErrorContext, |
| 1349 | "xmlXPtrEval: %d object left on the stack\n", |
| 1350 | stack); |
| 1351 | } |
| 1352 | if (ctxt->error != XPATH_EXPRESSION_OK) { |
| 1353 | xmlXPathFreeObject(res); |
| 1354 | res = NULL; |
| 1355 | } |
| 1356 | |
| 1357 | xmlXPathFreeParserContext(ctxt); |
| 1358 | return(res); |
| 1359 | } |
| 1360 | |
| 1361 | /** |
| 1362 | * xmlXPtrBuildRangeNodeList: |
| 1363 | * @range: a range object |
| 1364 | * |
| 1365 | * Build a node list tree copy of the range |
| 1366 | * |
| 1367 | * Returns an xmlNodePtr list or NULL. |
| 1368 | * the caller has to free the node tree. |
| 1369 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1370 | static xmlNodePtr |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1371 | xmlXPtrBuildRangeNodeList(xmlXPathObjectPtr range) { |
| 1372 | /* pointers to generated nodes */ |
| 1373 | xmlNodePtr list = NULL, last = NULL, parent = NULL, tmp; |
| 1374 | /* pointers to traversal nodes */ |
| 1375 | xmlNodePtr start, cur, end; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1376 | int index1, index2; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1377 | |
| 1378 | if (range == NULL) |
| 1379 | return(NULL); |
| 1380 | if (range->type != XPATH_RANGE) |
| 1381 | return(NULL); |
| 1382 | start = (xmlNodePtr) range->user; |
| 1383 | |
| 1384 | if (start == NULL) |
| 1385 | return(NULL); |
| 1386 | end = range->user2; |
| 1387 | if (end == NULL) |
| 1388 | return(xmlCopyNode(start, 1)); |
| 1389 | |
| 1390 | cur = start; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1391 | index1 = range->index; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1392 | index2 = range->index2; |
| 1393 | while (cur != NULL) { |
| 1394 | if (cur == end) { |
| 1395 | if (cur->type == XML_TEXT_NODE) { |
| 1396 | const xmlChar *content = cur->content; |
| 1397 | int len; |
| 1398 | |
| 1399 | if (content == NULL) { |
| 1400 | tmp = xmlNewTextLen(NULL, 0); |
| 1401 | } else { |
| 1402 | len = index2; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1403 | if ((cur == start) && (index1 > 1)) { |
| 1404 | content += (index1 - 1); |
| 1405 | len -= (index1 - 1); |
| 1406 | index1 = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1407 | } else { |
| 1408 | len = index2; |
| 1409 | } |
| 1410 | tmp = xmlNewTextLen(content, len); |
| 1411 | } |
| 1412 | /* single sub text node selection */ |
| 1413 | if (list == NULL) |
| 1414 | return(tmp); |
| 1415 | /* prune and return full set */ |
| 1416 | if (last != NULL) |
| 1417 | xmlAddNextSibling(last, tmp); |
| 1418 | else |
| 1419 | xmlAddChild(parent, tmp); |
| 1420 | return(list); |
| 1421 | } else { |
| 1422 | tmp = xmlCopyNode(cur, 0); |
| 1423 | if (list == NULL) |
| 1424 | list = tmp; |
| 1425 | else { |
| 1426 | if (last != NULL) |
| 1427 | xmlAddNextSibling(last, tmp); |
| 1428 | else |
| 1429 | xmlAddChild(parent, tmp); |
| 1430 | } |
| 1431 | last = NULL; |
| 1432 | parent = tmp; |
| 1433 | |
| 1434 | if (index2 > 1) { |
| 1435 | end = xmlXPtrGetNthChild(cur, index2 - 1); |
| 1436 | index2 = 0; |
| 1437 | } |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1438 | if ((cur == start) && (index1 > 1)) { |
| 1439 | cur = xmlXPtrGetNthChild(cur, index1 - 1); |
| 1440 | index1 = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1441 | } else { |
| 1442 | cur = cur->children; |
| 1443 | } |
| 1444 | /* |
| 1445 | * Now gather the remaining nodes from cur to end |
| 1446 | */ |
| 1447 | continue; /* while */ |
| 1448 | } |
| 1449 | } else if ((cur == start) && |
| 1450 | (list == NULL) /* looks superfluous but ... */ ) { |
Daniel Veillard | 7db3773 | 2001-07-12 01:20:08 +0000 | [diff] [blame] | 1451 | if ((cur->type == XML_TEXT_NODE) || |
| 1452 | (cur->type == XML_CDATA_SECTION_NODE)) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1453 | const xmlChar *content = cur->content; |
| 1454 | |
| 1455 | if (content == NULL) { |
| 1456 | tmp = xmlNewTextLen(NULL, 0); |
| 1457 | } else { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1458 | if (index1 > 1) { |
| 1459 | content += (index1 - 1); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1460 | } |
| 1461 | tmp = xmlNewText(content); |
| 1462 | } |
| 1463 | last = list = tmp; |
| 1464 | } else { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1465 | if ((cur == start) && (index1 > 1)) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1466 | tmp = xmlCopyNode(cur, 0); |
| 1467 | list = tmp; |
| 1468 | parent = tmp; |
| 1469 | last = NULL; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1470 | cur = xmlXPtrGetNthChild(cur, index1 - 1); |
| 1471 | index1 = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1472 | /* |
| 1473 | * Now gather the remaining nodes from cur to end |
| 1474 | */ |
| 1475 | continue; /* while */ |
| 1476 | } |
| 1477 | tmp = xmlCopyNode(cur, 1); |
| 1478 | list = tmp; |
| 1479 | parent = NULL; |
| 1480 | last = tmp; |
| 1481 | } |
| 1482 | } else { |
| 1483 | tmp = NULL; |
| 1484 | switch (cur->type) { |
| 1485 | case XML_DTD_NODE: |
| 1486 | case XML_ELEMENT_DECL: |
| 1487 | case XML_ATTRIBUTE_DECL: |
| 1488 | case XML_ENTITY_NODE: |
| 1489 | /* Do not copy DTD informations */ |
| 1490 | break; |
| 1491 | case XML_ENTITY_DECL: |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 1492 | TODO /* handle crossing entities -> stack needed */ |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1493 | break; |
| 1494 | case XML_XINCLUDE_START: |
| 1495 | case XML_XINCLUDE_END: |
| 1496 | /* don't consider it part of the tree content */ |
| 1497 | break; |
| 1498 | case XML_ATTRIBUTE_NODE: |
| 1499 | /* Humm, should not happen ! */ |
| 1500 | STRANGE |
| 1501 | break; |
| 1502 | default: |
| 1503 | tmp = xmlCopyNode(cur, 1); |
| 1504 | break; |
| 1505 | } |
| 1506 | if (tmp != NULL) { |
| 1507 | if ((list == NULL) || ((last == NULL) && (parent == NULL))) { |
| 1508 | STRANGE |
| 1509 | return(NULL); |
| 1510 | } |
| 1511 | if (last != NULL) |
| 1512 | xmlAddNextSibling(last, tmp); |
| 1513 | else { |
| 1514 | xmlAddChild(parent, tmp); |
| 1515 | last = tmp; |
| 1516 | } |
| 1517 | } |
| 1518 | } |
| 1519 | /* |
| 1520 | * Skip to next node in document order |
| 1521 | */ |
| 1522 | if ((list == NULL) || ((last == NULL) && (parent == NULL))) { |
| 1523 | STRANGE |
| 1524 | return(NULL); |
| 1525 | } |
| 1526 | cur = xmlXPtrAdvanceNode(cur); |
| 1527 | } |
| 1528 | return(list); |
| 1529 | } |
| 1530 | |
| 1531 | /** |
| 1532 | * xmlXPtrBuildNodeList: |
| 1533 | * @obj: the XPointer result from the evaluation. |
| 1534 | * |
| 1535 | * Build a node list tree copy of the XPointer result. |
Daniel Veillard | 39196eb | 2001-06-19 18:09:42 +0000 | [diff] [blame] | 1536 | * This will drop Attributes and Namespace declarations. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1537 | * |
| 1538 | * Returns an xmlNodePtr list or NULL. |
| 1539 | * the caller has to free the node tree. |
| 1540 | */ |
| 1541 | xmlNodePtr |
| 1542 | xmlXPtrBuildNodeList(xmlXPathObjectPtr obj) { |
| 1543 | xmlNodePtr list = NULL, last = NULL; |
| 1544 | int i; |
| 1545 | |
| 1546 | if (obj == NULL) |
| 1547 | return(NULL); |
| 1548 | switch (obj->type) { |
| 1549 | case XPATH_NODESET: { |
| 1550 | xmlNodeSetPtr set = obj->nodesetval; |
| 1551 | if (set == NULL) |
| 1552 | return(NULL); |
| 1553 | for (i = 0;i < set->nodeNr;i++) { |
Daniel Veillard | 39196eb | 2001-06-19 18:09:42 +0000 | [diff] [blame] | 1554 | if (set->nodeTab[i] == NULL) |
| 1555 | continue; |
| 1556 | switch (set->nodeTab[i]->type) { |
| 1557 | case XML_TEXT_NODE: |
| 1558 | case XML_CDATA_SECTION_NODE: |
| 1559 | case XML_ELEMENT_NODE: |
| 1560 | case XML_ENTITY_REF_NODE: |
| 1561 | case XML_ENTITY_NODE: |
| 1562 | case XML_PI_NODE: |
| 1563 | case XML_COMMENT_NODE: |
| 1564 | case XML_DOCUMENT_NODE: |
| 1565 | case XML_HTML_DOCUMENT_NODE: |
| 1566 | #ifdef LIBXML_DOCB_ENABLED |
| 1567 | case XML_DOCB_DOCUMENT_NODE: |
| 1568 | #endif |
| 1569 | case XML_XINCLUDE_START: |
| 1570 | case XML_XINCLUDE_END: |
| 1571 | break; |
| 1572 | case XML_ATTRIBUTE_NODE: |
| 1573 | case XML_NAMESPACE_DECL: |
| 1574 | case XML_DOCUMENT_TYPE_NODE: |
| 1575 | case XML_DOCUMENT_FRAG_NODE: |
| 1576 | case XML_NOTATION_NODE: |
| 1577 | case XML_DTD_NODE: |
| 1578 | case XML_ELEMENT_DECL: |
| 1579 | case XML_ATTRIBUTE_DECL: |
| 1580 | case XML_ENTITY_DECL: |
| 1581 | continue; /* for */ |
| 1582 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1583 | if (last == NULL) |
| 1584 | list = last = xmlCopyNode(set->nodeTab[i], 1); |
| 1585 | else { |
| 1586 | xmlAddNextSibling(last, xmlCopyNode(set->nodeTab[i], 1)); |
| 1587 | if (last->next != NULL) |
| 1588 | last = last->next; |
| 1589 | } |
| 1590 | } |
| 1591 | break; |
| 1592 | } |
| 1593 | case XPATH_LOCATIONSET: { |
| 1594 | xmlLocationSetPtr set = (xmlLocationSetPtr) obj->user; |
| 1595 | if (set == NULL) |
| 1596 | return(NULL); |
| 1597 | for (i = 0;i < set->locNr;i++) { |
| 1598 | if (last == NULL) |
| 1599 | list = last = xmlXPtrBuildNodeList(set->locTab[i]); |
| 1600 | else |
| 1601 | xmlAddNextSibling(last, |
| 1602 | xmlXPtrBuildNodeList(set->locTab[i])); |
| 1603 | if (last != NULL) { |
| 1604 | while (last->next != NULL) |
| 1605 | last = last->next; |
| 1606 | } |
| 1607 | } |
| 1608 | break; |
| 1609 | } |
| 1610 | case XPATH_RANGE: |
| 1611 | return(xmlXPtrBuildRangeNodeList(obj)); |
| 1612 | case XPATH_POINT: |
| 1613 | return(xmlCopyNode(obj->user, 0)); |
| 1614 | default: |
| 1615 | break; |
| 1616 | } |
| 1617 | return(list); |
| 1618 | } |
| 1619 | |
| 1620 | /************************************************************************ |
| 1621 | * * |
| 1622 | * XPointer functions * |
| 1623 | * * |
| 1624 | ************************************************************************/ |
| 1625 | |
| 1626 | /** |
| 1627 | * xmlXPtrNbLocChildren: |
| 1628 | * @node: an xmlNodePtr |
| 1629 | * |
Daniel Veillard | 60087f3 | 2001-10-10 09:45:09 +0000 | [diff] [blame] | 1630 | * 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] | 1631 | * string value in case of text/PI/Comments nodes |
| 1632 | * |
| 1633 | * Returns the number of location children |
| 1634 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1635 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1636 | xmlXPtrNbLocChildren(xmlNodePtr node) { |
| 1637 | int ret = 0; |
| 1638 | if (node == NULL) |
| 1639 | return(-1); |
| 1640 | switch (node->type) { |
| 1641 | case XML_HTML_DOCUMENT_NODE: |
| 1642 | case XML_DOCUMENT_NODE: |
| 1643 | case XML_ELEMENT_NODE: |
| 1644 | node = node->children; |
| 1645 | while (node != NULL) { |
| 1646 | if (node->type == XML_ELEMENT_NODE) |
| 1647 | ret++; |
| 1648 | node = node->next; |
| 1649 | } |
| 1650 | break; |
| 1651 | case XML_ATTRIBUTE_NODE: |
| 1652 | return(-1); |
| 1653 | |
| 1654 | case XML_PI_NODE: |
| 1655 | case XML_COMMENT_NODE: |
| 1656 | case XML_TEXT_NODE: |
| 1657 | case XML_CDATA_SECTION_NODE: |
| 1658 | case XML_ENTITY_REF_NODE: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1659 | ret = xmlStrlen(node->content); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1660 | break; |
| 1661 | default: |
| 1662 | return(-1); |
| 1663 | } |
| 1664 | return(ret); |
| 1665 | } |
| 1666 | |
| 1667 | /** |
| 1668 | * xmlXPtrHereFunction: |
| 1669 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1670 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1671 | * |
| 1672 | * Function implementing here() operation |
| 1673 | * as described in 5.4.3 |
| 1674 | */ |
| 1675 | void |
| 1676 | xmlXPtrHereFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1677 | CHECK_ARITY(0); |
| 1678 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1679 | if (ctxt->context->here == NULL) |
| 1680 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 1681 | |
| 1682 | valuePush(ctxt, xmlXPtrNewLocationSetNodes(ctxt->context->here, NULL)); |
| 1683 | } |
| 1684 | |
| 1685 | /** |
| 1686 | * xmlXPtrOriginFunction: |
| 1687 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1688 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1689 | * |
| 1690 | * Function implementing origin() operation |
| 1691 | * as described in 5.4.3 |
| 1692 | */ |
| 1693 | void |
| 1694 | xmlXPtrOriginFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1695 | CHECK_ARITY(0); |
| 1696 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1697 | if (ctxt->context->origin == NULL) |
| 1698 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 1699 | |
| 1700 | valuePush(ctxt, xmlXPtrNewLocationSetNodes(ctxt->context->origin, NULL)); |
| 1701 | } |
| 1702 | |
| 1703 | /** |
| 1704 | * xmlXPtrStartPointFunction: |
| 1705 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1706 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1707 | * |
| 1708 | * Function implementing start-point() operation |
| 1709 | * as described in 5.4.3 |
| 1710 | * ---------------- |
| 1711 | * location-set start-point(location-set) |
| 1712 | * |
| 1713 | * For each location x in the argument location-set, start-point adds a |
| 1714 | * location of type point to the result location-set. That point represents |
| 1715 | * the start point of location x and is determined by the following rules: |
| 1716 | * |
| 1717 | * - If x is of type point, the start point is x. |
| 1718 | * - If x is of type range, the start point is the start point of x. |
| 1719 | * - If x is of type root, element, text, comment, or processing instruction, |
| 1720 | * - the container node of the start point is x and the index is 0. |
| 1721 | * - If x is of type attribute or namespace, the function must signal a |
| 1722 | * syntax error. |
| 1723 | * ---------------- |
| 1724 | * |
| 1725 | */ |
| 1726 | void |
| 1727 | xmlXPtrStartPointFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 1728 | xmlXPathObjectPtr tmp, obj, point; |
| 1729 | xmlLocationSetPtr newset = NULL; |
| 1730 | xmlLocationSetPtr oldset = NULL; |
| 1731 | |
| 1732 | CHECK_ARITY(1); |
| 1733 | if ((ctxt->value == NULL) || |
| 1734 | ((ctxt->value->type != XPATH_LOCATIONSET) && |
| 1735 | (ctxt->value->type != XPATH_NODESET))) |
| 1736 | XP_ERROR(XPATH_INVALID_TYPE) |
| 1737 | |
| 1738 | obj = valuePop(ctxt); |
| 1739 | if (obj->type == XPATH_NODESET) { |
| 1740 | /* |
| 1741 | * First convert to a location set |
| 1742 | */ |
| 1743 | tmp = xmlXPtrNewLocationSetNodeSet(obj->nodesetval); |
| 1744 | xmlXPathFreeObject(obj); |
| 1745 | obj = tmp; |
| 1746 | } |
| 1747 | |
| 1748 | newset = xmlXPtrLocationSetCreate(NULL); |
| 1749 | if (newset == NULL) { |
| 1750 | xmlXPathFreeObject(obj); |
| 1751 | XP_ERROR(XPATH_MEMORY_ERROR); |
| 1752 | } |
| 1753 | oldset = (xmlLocationSetPtr) obj->user; |
| 1754 | if (oldset != NULL) { |
| 1755 | int i; |
| 1756 | |
| 1757 | for (i = 0; i < oldset->locNr; i++) { |
| 1758 | tmp = oldset->locTab[i]; |
| 1759 | if (tmp == NULL) |
| 1760 | continue; |
| 1761 | point = NULL; |
| 1762 | switch (tmp->type) { |
| 1763 | case XPATH_POINT: |
| 1764 | point = xmlXPtrNewPoint(tmp->user, tmp->index); |
| 1765 | break; |
| 1766 | case XPATH_RANGE: { |
| 1767 | xmlNodePtr node = tmp->user; |
| 1768 | if (node != NULL) { |
| 1769 | if (node->type == XML_ATTRIBUTE_NODE) { |
| 1770 | /* TODO: Namespace Nodes ??? */ |
| 1771 | xmlXPathFreeObject(obj); |
| 1772 | xmlXPtrFreeLocationSet(newset); |
| 1773 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 1774 | } |
| 1775 | point = xmlXPtrNewPoint(node, tmp->index); |
| 1776 | } |
| 1777 | break; |
| 1778 | } |
| 1779 | default: |
| 1780 | /*** Should we raise an error ? |
| 1781 | xmlXPathFreeObject(obj); |
| 1782 | xmlXPathFreeObject(newset); |
| 1783 | XP_ERROR(XPATH_INVALID_TYPE) |
| 1784 | ***/ |
| 1785 | break; |
| 1786 | } |
| 1787 | if (point != NULL) |
| 1788 | xmlXPtrLocationSetAdd(newset, point); |
| 1789 | } |
| 1790 | } |
| 1791 | xmlXPathFreeObject(obj); |
| 1792 | valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); |
| 1793 | } |
| 1794 | |
| 1795 | /** |
| 1796 | * xmlXPtrEndPointFunction: |
| 1797 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1798 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1799 | * |
| 1800 | * Function implementing end-point() operation |
| 1801 | * as described in 5.4.3 |
| 1802 | * ---------------------------- |
| 1803 | * location-set end-point(location-set) |
| 1804 | * |
| 1805 | * 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] | 1806 | * location of type point to the result location-set. That point represents |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1807 | * the end point of location x and is determined by the following rules: |
| 1808 | * |
| 1809 | * - If x is of type point, the resulting point is x. |
| 1810 | * - If x is of type range, the resulting point is the end point of x. |
| 1811 | * - If x is of type root or element, the container node of the resulting |
| 1812 | * point is x and the index is the number of location children of x. |
| 1813 | * - If x is of type text, comment, or processing instruction, the container |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 1814 | * 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] | 1815 | * string-value of x. |
| 1816 | * - If x is of type attribute or namespace, the function must signal a |
| 1817 | * syntax error. |
| 1818 | * ---------------------------- |
| 1819 | */ |
| 1820 | void |
| 1821 | xmlXPtrEndPointFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 1822 | xmlXPathObjectPtr tmp, obj, point; |
| 1823 | xmlLocationSetPtr newset = NULL; |
| 1824 | xmlLocationSetPtr oldset = NULL; |
| 1825 | |
| 1826 | CHECK_ARITY(1); |
| 1827 | if ((ctxt->value == NULL) || |
| 1828 | ((ctxt->value->type != XPATH_LOCATIONSET) && |
| 1829 | (ctxt->value->type != XPATH_NODESET))) |
| 1830 | XP_ERROR(XPATH_INVALID_TYPE) |
| 1831 | |
| 1832 | obj = valuePop(ctxt); |
| 1833 | if (obj->type == XPATH_NODESET) { |
| 1834 | /* |
| 1835 | * First convert to a location set |
| 1836 | */ |
| 1837 | tmp = xmlXPtrNewLocationSetNodeSet(obj->nodesetval); |
| 1838 | xmlXPathFreeObject(obj); |
| 1839 | obj = tmp; |
| 1840 | } |
| 1841 | |
| 1842 | newset = xmlXPtrLocationSetCreate(NULL); |
| 1843 | oldset = (xmlLocationSetPtr) obj->user; |
| 1844 | if (oldset != NULL) { |
| 1845 | int i; |
| 1846 | |
| 1847 | for (i = 0; i < oldset->locNr; i++) { |
| 1848 | tmp = oldset->locTab[i]; |
| 1849 | if (tmp == NULL) |
| 1850 | continue; |
| 1851 | point = NULL; |
| 1852 | switch (tmp->type) { |
| 1853 | case XPATH_POINT: |
| 1854 | point = xmlXPtrNewPoint(tmp->user, tmp->index); |
| 1855 | break; |
| 1856 | case XPATH_RANGE: { |
| 1857 | xmlNodePtr node = tmp->user2; |
| 1858 | if (node != NULL) { |
| 1859 | if (node->type == XML_ATTRIBUTE_NODE) { |
| 1860 | /* TODO: Namespace Nodes ??? */ |
| 1861 | xmlXPathFreeObject(obj); |
| 1862 | xmlXPtrFreeLocationSet(newset); |
| 1863 | XP_ERROR(XPTR_SYNTAX_ERROR); |
| 1864 | } |
| 1865 | point = xmlXPtrNewPoint(node, tmp->index2); |
| 1866 | } else if (tmp->user == NULL) { |
| 1867 | point = xmlXPtrNewPoint(node, |
| 1868 | xmlXPtrNbLocChildren(node)); |
| 1869 | } |
| 1870 | break; |
| 1871 | } |
| 1872 | default: |
| 1873 | /*** Should we raise an error ? |
| 1874 | xmlXPathFreeObject(obj); |
| 1875 | xmlXPathFreeObject(newset); |
| 1876 | XP_ERROR(XPATH_INVALID_TYPE) |
| 1877 | ***/ |
| 1878 | break; |
| 1879 | } |
| 1880 | if (point != NULL) |
| 1881 | xmlXPtrLocationSetAdd(newset, point); |
| 1882 | } |
| 1883 | } |
| 1884 | xmlXPathFreeObject(obj); |
| 1885 | valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); |
| 1886 | } |
| 1887 | |
| 1888 | |
| 1889 | /** |
| 1890 | * xmlXPtrCoveringRange: |
| 1891 | * @ctxt: the XPointer Parser context |
| 1892 | * @loc: the location for which the covering range must be computed |
| 1893 | * |
| 1894 | * A covering range is a range that wholly encompasses a location |
| 1895 | * Section 5.3.3. Covering Ranges for All Location Types |
| 1896 | * http://www.w3.org/TR/xptr#N2267 |
| 1897 | * |
| 1898 | * Returns a new location or NULL in case of error |
| 1899 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1900 | static xmlXPathObjectPtr |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1901 | xmlXPtrCoveringRange(xmlXPathParserContextPtr ctxt, xmlXPathObjectPtr loc) { |
| 1902 | if (loc == NULL) |
| 1903 | return(NULL); |
| 1904 | if ((ctxt == NULL) || (ctxt->context == NULL) || |
| 1905 | (ctxt->context->doc == NULL)) |
| 1906 | return(NULL); |
| 1907 | switch (loc->type) { |
| 1908 | case XPATH_POINT: |
| 1909 | return(xmlXPtrNewRange(loc->user, loc->index, |
| 1910 | loc->user, loc->index)); |
| 1911 | case XPATH_RANGE: |
| 1912 | if (loc->user2 != NULL) { |
| 1913 | return(xmlXPtrNewRange(loc->user, loc->index, |
| 1914 | loc->user2, loc->index2)); |
| 1915 | } else { |
| 1916 | xmlNodePtr node = (xmlNodePtr) loc->user; |
| 1917 | if (node == (xmlNodePtr) ctxt->context->doc) { |
| 1918 | return(xmlXPtrNewRange(node, 0, node, |
| 1919 | xmlXPtrGetArity(node))); |
| 1920 | } else { |
| 1921 | switch (node->type) { |
| 1922 | case XML_ATTRIBUTE_NODE: |
| 1923 | /* !!! our model is slightly different than XPath */ |
| 1924 | return(xmlXPtrNewRange(node, 0, node, |
| 1925 | xmlXPtrGetArity(node))); |
| 1926 | case XML_ELEMENT_NODE: |
| 1927 | case XML_TEXT_NODE: |
| 1928 | case XML_CDATA_SECTION_NODE: |
| 1929 | case XML_ENTITY_REF_NODE: |
| 1930 | case XML_PI_NODE: |
| 1931 | case XML_COMMENT_NODE: |
| 1932 | case XML_DOCUMENT_NODE: |
| 1933 | case XML_NOTATION_NODE: |
| 1934 | case XML_HTML_DOCUMENT_NODE: { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1935 | int indx = xmlXPtrGetIndex(node); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1936 | |
| 1937 | node = node->parent; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1938 | return(xmlXPtrNewRange(node, indx - 1, |
| 1939 | node, indx + 1)); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1940 | } |
| 1941 | default: |
| 1942 | return(NULL); |
| 1943 | } |
| 1944 | } |
| 1945 | } |
| 1946 | default: |
| 1947 | TODO /* missed one case ??? */ |
| 1948 | } |
| 1949 | return(NULL); |
| 1950 | } |
| 1951 | |
| 1952 | /** |
| 1953 | * xmlXPtrRangeFunction: |
| 1954 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1955 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1956 | * |
| 1957 | * Function implementing the range() function 5.4.3 |
| 1958 | * location-set range(location-set ) |
| 1959 | * |
| 1960 | * The range function returns ranges covering the locations in |
| 1961 | * the argument location-set. For each location x in the argument |
| 1962 | * location-set, a range location representing the covering range of |
| 1963 | * x is added to the result location-set. |
| 1964 | */ |
| 1965 | void |
| 1966 | xmlXPtrRangeFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 1967 | int i; |
| 1968 | xmlXPathObjectPtr set; |
| 1969 | xmlLocationSetPtr oldset; |
| 1970 | xmlLocationSetPtr newset; |
| 1971 | |
| 1972 | CHECK_ARITY(1); |
| 1973 | if ((ctxt->value == NULL) || |
| 1974 | ((ctxt->value->type != XPATH_LOCATIONSET) && |
| 1975 | (ctxt->value->type != XPATH_NODESET))) |
| 1976 | XP_ERROR(XPATH_INVALID_TYPE) |
| 1977 | |
| 1978 | set = valuePop(ctxt); |
| 1979 | if (set->type == XPATH_NODESET) { |
| 1980 | xmlXPathObjectPtr tmp; |
| 1981 | |
| 1982 | /* |
| 1983 | * First convert to a location set |
| 1984 | */ |
| 1985 | tmp = xmlXPtrNewLocationSetNodeSet(set->nodesetval); |
| 1986 | xmlXPathFreeObject(set); |
| 1987 | set = tmp; |
| 1988 | } |
| 1989 | oldset = (xmlLocationSetPtr) set->user; |
| 1990 | |
| 1991 | /* |
| 1992 | * The loop is to compute the covering range for each item and add it |
| 1993 | */ |
| 1994 | newset = xmlXPtrLocationSetCreate(NULL); |
| 1995 | for (i = 0;i < oldset->locNr;i++) { |
| 1996 | xmlXPtrLocationSetAdd(newset, |
| 1997 | xmlXPtrCoveringRange(ctxt, oldset->locTab[i])); |
| 1998 | } |
| 1999 | |
| 2000 | /* |
| 2001 | * Save the new value and cleanup |
| 2002 | */ |
| 2003 | valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); |
| 2004 | xmlXPathFreeObject(set); |
| 2005 | } |
| 2006 | |
| 2007 | /** |
| 2008 | * xmlXPtrInsideRange: |
| 2009 | * @ctxt: the XPointer Parser context |
| 2010 | * @loc: the location for which the inside range must be computed |
| 2011 | * |
| 2012 | * A inside range is a range described in the range-inside() description |
| 2013 | * |
| 2014 | * Returns a new location or NULL in case of error |
| 2015 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2016 | static xmlXPathObjectPtr |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2017 | xmlXPtrInsideRange(xmlXPathParserContextPtr ctxt, xmlXPathObjectPtr loc) { |
| 2018 | if (loc == NULL) |
| 2019 | return(NULL); |
| 2020 | if ((ctxt == NULL) || (ctxt->context == NULL) || |
| 2021 | (ctxt->context->doc == NULL)) |
| 2022 | return(NULL); |
| 2023 | switch (loc->type) { |
| 2024 | case XPATH_POINT: { |
| 2025 | xmlNodePtr node = (xmlNodePtr) loc->user; |
| 2026 | switch (node->type) { |
| 2027 | case XML_PI_NODE: |
| 2028 | case XML_COMMENT_NODE: |
| 2029 | case XML_TEXT_NODE: |
| 2030 | case XML_CDATA_SECTION_NODE: { |
| 2031 | if (node->content == NULL) { |
| 2032 | return(xmlXPtrNewRange(node, 0, node, 0)); |
| 2033 | } else { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2034 | return(xmlXPtrNewRange(node, 0, node, |
| 2035 | xmlStrlen(node->content))); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2036 | } |
| 2037 | } |
| 2038 | case XML_ATTRIBUTE_NODE: |
| 2039 | case XML_ELEMENT_NODE: |
| 2040 | case XML_ENTITY_REF_NODE: |
| 2041 | case XML_DOCUMENT_NODE: |
| 2042 | case XML_NOTATION_NODE: |
| 2043 | case XML_HTML_DOCUMENT_NODE: { |
| 2044 | return(xmlXPtrNewRange(node, 0, node, |
| 2045 | xmlXPtrGetArity(node))); |
| 2046 | } |
| 2047 | default: |
Daniel Veillard | b44025c | 2001-10-11 22:55:55 +0000 | [diff] [blame] | 2048 | break; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2049 | } |
| 2050 | return(NULL); |
| 2051 | } |
| 2052 | case XPATH_RANGE: { |
| 2053 | xmlNodePtr node = (xmlNodePtr) loc->user; |
| 2054 | if (loc->user2 != NULL) { |
| 2055 | return(xmlXPtrNewRange(node, loc->index, |
| 2056 | loc->user2, loc->index2)); |
| 2057 | } else { |
| 2058 | switch (node->type) { |
| 2059 | case XML_PI_NODE: |
| 2060 | case XML_COMMENT_NODE: |
| 2061 | case XML_TEXT_NODE: |
| 2062 | case XML_CDATA_SECTION_NODE: { |
| 2063 | if (node->content == NULL) { |
| 2064 | return(xmlXPtrNewRange(node, 0, node, 0)); |
| 2065 | } else { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2066 | return(xmlXPtrNewRange(node, 0, node, |
| 2067 | xmlStrlen(node->content))); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2068 | } |
| 2069 | } |
| 2070 | case XML_ATTRIBUTE_NODE: |
| 2071 | case XML_ELEMENT_NODE: |
| 2072 | case XML_ENTITY_REF_NODE: |
| 2073 | case XML_DOCUMENT_NODE: |
| 2074 | case XML_NOTATION_NODE: |
| 2075 | case XML_HTML_DOCUMENT_NODE: { |
| 2076 | return(xmlXPtrNewRange(node, 0, node, |
| 2077 | xmlXPtrGetArity(node))); |
| 2078 | } |
| 2079 | default: |
Daniel Veillard | b44025c | 2001-10-11 22:55:55 +0000 | [diff] [blame] | 2080 | break; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2081 | } |
| 2082 | return(NULL); |
| 2083 | } |
| 2084 | } |
| 2085 | default: |
| 2086 | TODO /* missed one case ??? */ |
| 2087 | } |
| 2088 | return(NULL); |
| 2089 | } |
| 2090 | |
| 2091 | /** |
| 2092 | * xmlXPtrRangeInsideFunction: |
| 2093 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2094 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2095 | * |
| 2096 | * Function implementing the range-inside() function 5.4.3 |
| 2097 | * location-set range-inside(location-set ) |
| 2098 | * |
| 2099 | * The range-inside function returns ranges covering the contents of |
| 2100 | * the locations in the argument location-set. For each location x in |
| 2101 | * the argument location-set, a range location is added to the result |
| 2102 | * location-set. If x is a range location, then x is added to the |
| 2103 | * result location-set. If x is not a range location, then x is used |
| 2104 | * as the container location of the start and end points of the range |
| 2105 | * location to be added; the index of the start point of the range is |
| 2106 | * zero; if the end point is a character point then its index is the |
| 2107 | * length of the string-value of x, and otherwise is the number of |
| 2108 | * location children of x. |
| 2109 | * |
| 2110 | */ |
| 2111 | void |
| 2112 | xmlXPtrRangeInsideFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 2113 | int i; |
| 2114 | xmlXPathObjectPtr set; |
| 2115 | xmlLocationSetPtr oldset; |
| 2116 | xmlLocationSetPtr newset; |
| 2117 | |
| 2118 | CHECK_ARITY(1); |
| 2119 | if ((ctxt->value == NULL) || |
| 2120 | ((ctxt->value->type != XPATH_LOCATIONSET) && |
| 2121 | (ctxt->value->type != XPATH_NODESET))) |
| 2122 | XP_ERROR(XPATH_INVALID_TYPE) |
| 2123 | |
| 2124 | set = valuePop(ctxt); |
| 2125 | if (set->type == XPATH_NODESET) { |
| 2126 | xmlXPathObjectPtr tmp; |
| 2127 | |
| 2128 | /* |
| 2129 | * First convert to a location set |
| 2130 | */ |
| 2131 | tmp = xmlXPtrNewLocationSetNodeSet(set->nodesetval); |
| 2132 | xmlXPathFreeObject(set); |
| 2133 | set = tmp; |
| 2134 | } |
| 2135 | oldset = (xmlLocationSetPtr) set->user; |
| 2136 | |
| 2137 | /* |
| 2138 | * The loop is to compute the covering range for each item and add it |
| 2139 | */ |
| 2140 | newset = xmlXPtrLocationSetCreate(NULL); |
| 2141 | for (i = 0;i < oldset->locNr;i++) { |
| 2142 | xmlXPtrLocationSetAdd(newset, |
| 2143 | xmlXPtrInsideRange(ctxt, oldset->locTab[i])); |
| 2144 | } |
| 2145 | |
| 2146 | /* |
| 2147 | * Save the new value and cleanup |
| 2148 | */ |
| 2149 | valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); |
| 2150 | xmlXPathFreeObject(set); |
| 2151 | } |
| 2152 | |
| 2153 | /** |
| 2154 | * xmlXPtrRangeToFunction: |
| 2155 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2156 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2157 | * |
| 2158 | * Implement the range-to() XPointer function |
| 2159 | */ |
| 2160 | void |
| 2161 | xmlXPtrRangeToFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 2162 | xmlXPathObjectPtr range; |
| 2163 | const xmlChar *cur; |
| 2164 | xmlXPathObjectPtr res, obj; |
| 2165 | xmlXPathObjectPtr tmp; |
| 2166 | xmlLocationSetPtr newset = NULL; |
| 2167 | xmlNodeSetPtr oldset; |
| 2168 | int i; |
| 2169 | |
| 2170 | CHECK_ARITY(1); |
| 2171 | /* |
| 2172 | * Save the expression pointer since we will have to evaluate |
| 2173 | * it multiple times. Initialize the new set. |
| 2174 | */ |
| 2175 | CHECK_TYPE(XPATH_NODESET); |
| 2176 | obj = valuePop(ctxt); |
| 2177 | oldset = obj->nodesetval; |
| 2178 | ctxt->context->node = NULL; |
| 2179 | |
| 2180 | cur = ctxt->cur; |
| 2181 | newset = xmlXPtrLocationSetCreate(NULL); |
| 2182 | |
| 2183 | for (i = 0; i < oldset->nodeNr; i++) { |
| 2184 | ctxt->cur = cur; |
| 2185 | |
| 2186 | /* |
| 2187 | * Run the evaluation with a node list made of a single item |
| 2188 | * in the nodeset. |
| 2189 | */ |
| 2190 | ctxt->context->node = oldset->nodeTab[i]; |
| 2191 | tmp = xmlXPathNewNodeSet(ctxt->context->node); |
| 2192 | valuePush(ctxt, tmp); |
| 2193 | |
| 2194 | xmlXPathEvalExpr(ctxt); |
| 2195 | CHECK_ERROR; |
| 2196 | |
| 2197 | /* |
| 2198 | * The result of the evaluation need to be tested to |
| 2199 | * decided whether the filter succeeded or not |
| 2200 | */ |
| 2201 | res = valuePop(ctxt); |
| 2202 | range = xmlXPtrNewRangeNodeObject(oldset->nodeTab[i], res); |
| 2203 | if (range != NULL) { |
| 2204 | xmlXPtrLocationSetAdd(newset, range); |
| 2205 | } |
| 2206 | |
| 2207 | /* |
| 2208 | * Cleanup |
| 2209 | */ |
| 2210 | if (res != NULL) |
| 2211 | xmlXPathFreeObject(res); |
| 2212 | if (ctxt->value == tmp) { |
| 2213 | res = valuePop(ctxt); |
| 2214 | xmlXPathFreeObject(res); |
| 2215 | } |
| 2216 | |
| 2217 | ctxt->context->node = NULL; |
| 2218 | } |
| 2219 | |
| 2220 | /* |
| 2221 | * The result is used as the new evaluation set. |
| 2222 | */ |
| 2223 | xmlXPathFreeObject(obj); |
| 2224 | ctxt->context->node = NULL; |
| 2225 | ctxt->context->contextSize = -1; |
| 2226 | ctxt->context->proximityPosition = -1; |
| 2227 | valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); |
| 2228 | } |
| 2229 | |
| 2230 | /** |
| 2231 | * xmlXPtrAdvanceNode: |
| 2232 | * @cur: the node |
| 2233 | * |
| 2234 | * Advance to the next element or text node in document order |
| 2235 | * TODO: add a stack for entering/exiting entities |
| 2236 | * |
| 2237 | * Returns -1 in case of failure, 0 otherwise |
| 2238 | */ |
| 2239 | xmlNodePtr |
| 2240 | xmlXPtrAdvanceNode(xmlNodePtr cur) { |
| 2241 | next: |
| 2242 | if (cur == NULL) |
| 2243 | return(NULL); |
| 2244 | if (cur->children != NULL) { |
| 2245 | cur = cur->children ; |
| 2246 | goto found; |
| 2247 | } |
| 2248 | if (cur->next != NULL) { |
| 2249 | cur = cur->next; |
| 2250 | goto found; |
| 2251 | } |
| 2252 | do { |
| 2253 | cur = cur->parent; |
| 2254 | if (cur == NULL) return(NULL); |
| 2255 | if (cur->next != NULL) { |
| 2256 | cur = cur->next; |
| 2257 | goto found; |
| 2258 | } |
| 2259 | } while (cur != NULL); |
| 2260 | |
| 2261 | found: |
| 2262 | if ((cur->type != XML_ELEMENT_NODE) && |
| 2263 | (cur->type != XML_TEXT_NODE) && |
| 2264 | (cur->type != XML_DOCUMENT_NODE) && |
| 2265 | (cur->type != XML_HTML_DOCUMENT_NODE) && |
| 2266 | (cur->type != XML_CDATA_SECTION_NODE)) |
| 2267 | goto next; |
| 2268 | if (cur->type == XML_ENTITY_REF_NODE) { |
| 2269 | TODO |
| 2270 | } |
| 2271 | return(cur); |
| 2272 | } |
| 2273 | |
| 2274 | /** |
| 2275 | * xmlXPtrAdvanceChar: |
| 2276 | * @node: the node |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2277 | * @indx: the indx |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2278 | * @bytes: the number of bytes |
| 2279 | * |
| 2280 | * Advance a point of the associated number of bytes (not UTF8 chars) |
| 2281 | * |
| 2282 | * Returns -1 in case of failure, 0 otherwise |
| 2283 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2284 | static int |
| 2285 | xmlXPtrAdvanceChar(xmlNodePtr *node, int *indx, int bytes) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2286 | xmlNodePtr cur; |
| 2287 | int pos; |
| 2288 | int len; |
| 2289 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2290 | if ((node == NULL) || (indx == NULL)) |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2291 | return(-1); |
| 2292 | cur = *node; |
| 2293 | if (cur == NULL) |
| 2294 | return(-1); |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2295 | pos = *indx; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2296 | |
| 2297 | while (bytes >= 0) { |
| 2298 | /* |
| 2299 | * First position to the beginning of the first text node |
| 2300 | * corresponding to this point |
| 2301 | */ |
| 2302 | while ((cur != NULL) && |
| 2303 | ((cur->type == XML_ELEMENT_NODE) || |
| 2304 | (cur->type == XML_DOCUMENT_NODE) || |
| 2305 | (cur->type == XML_HTML_DOCUMENT_NODE))) { |
| 2306 | if (pos > 0) { |
| 2307 | cur = xmlXPtrGetNthChild(cur, pos); |
| 2308 | pos = 0; |
| 2309 | } else { |
| 2310 | cur = xmlXPtrAdvanceNode(cur); |
| 2311 | pos = 0; |
| 2312 | } |
| 2313 | } |
| 2314 | |
| 2315 | if (cur == NULL) { |
| 2316 | *node = NULL; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2317 | *indx = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2318 | return(-1); |
| 2319 | } |
| 2320 | |
| 2321 | /* |
| 2322 | * if there is no move needed return the current value. |
| 2323 | */ |
| 2324 | if (pos == 0) pos = 1; |
| 2325 | if (bytes == 0) { |
| 2326 | *node = cur; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2327 | *indx = pos; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2328 | return(0); |
| 2329 | } |
| 2330 | /* |
| 2331 | * We should have a text (or cdata) node ... |
| 2332 | */ |
| 2333 | len = 0; |
Daniel Veillard | 7db3773 | 2001-07-12 01:20:08 +0000 | [diff] [blame] | 2334 | if ((cur->type != XML_ELEMENT_NODE) && |
| 2335 | (cur->content != NULL)) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2336 | len = xmlStrlen(cur->content); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2337 | } |
| 2338 | if (pos > len) { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2339 | /* 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] | 2340 | STRANGE |
| 2341 | pos = len; |
| 2342 | } |
| 2343 | if (pos + bytes >= len) { |
| 2344 | bytes -= (len - pos); |
| 2345 | cur = xmlXPtrAdvanceNode(cur); |
| 2346 | cur = 0; |
| 2347 | } else if (pos + bytes < len) { |
| 2348 | pos += bytes; |
| 2349 | *node = cur; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2350 | *indx = pos; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2351 | return(0); |
| 2352 | } |
| 2353 | } |
| 2354 | return(-1); |
| 2355 | } |
| 2356 | |
| 2357 | /** |
| 2358 | * xmlXPtrMatchString: |
| 2359 | * @string: the string to search |
| 2360 | * @start: the start textnode |
| 2361 | * @startindex: the start index |
| 2362 | * @end: the end textnode IN/OUT |
| 2363 | * @endindex: the end index IN/OUT |
| 2364 | * |
| 2365 | * Check whether the document contains @string at the position |
| 2366 | * (@start, @startindex) and limited by the (@end, @endindex) point |
| 2367 | * |
| 2368 | * Returns -1 in case of failure, 0 if not found, 1 if found in which case |
| 2369 | * (@start, @startindex) will indicate the position of the beginning |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 2370 | * of the range and (@end, @endindex) will indicate the end |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2371 | * of the range |
| 2372 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2373 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2374 | xmlXPtrMatchString(const xmlChar *string, xmlNodePtr start, int startindex, |
| 2375 | xmlNodePtr *end, int *endindex) { |
| 2376 | xmlNodePtr cur; |
| 2377 | int pos; /* 0 based */ |
| 2378 | int len; /* in bytes */ |
| 2379 | int stringlen; /* in bytes */ |
| 2380 | int match; |
| 2381 | |
| 2382 | if (string == NULL) |
| 2383 | return(-1); |
| 2384 | if (start == NULL) |
| 2385 | return(-1); |
| 2386 | if ((end == NULL) || (endindex == NULL)) |
| 2387 | return(-1); |
| 2388 | cur = start; |
| 2389 | if (cur == NULL) |
| 2390 | return(-1); |
| 2391 | pos = startindex - 1; |
| 2392 | stringlen = xmlStrlen(string); |
| 2393 | |
| 2394 | while (stringlen > 0) { |
| 2395 | if ((cur == *end) && (pos + stringlen > *endindex)) |
| 2396 | return(0); |
Daniel Veillard | 7db3773 | 2001-07-12 01:20:08 +0000 | [diff] [blame] | 2397 | |
| 2398 | if ((cur->type != XML_ELEMENT_NODE) && (cur->content != NULL)) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2399 | len = xmlStrlen(cur->content); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2400 | if (len >= pos + stringlen) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2401 | match = (!xmlStrncmp(&cur->content[pos], string, stringlen)); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2402 | if (match) { |
| 2403 | #ifdef DEBUG_RANGES |
| 2404 | xmlGenericError(xmlGenericErrorContext, |
| 2405 | "found range %d bytes at index %d of ->", |
| 2406 | stringlen, pos + 1); |
| 2407 | xmlDebugDumpString(stdout, cur->content); |
| 2408 | xmlGenericError(xmlGenericErrorContext, "\n"); |
| 2409 | #endif |
| 2410 | *end = cur; |
| 2411 | *endindex = pos + stringlen; |
| 2412 | return(1); |
| 2413 | } else { |
| 2414 | return(0); |
| 2415 | } |
| 2416 | } else { |
| 2417 | int sub = len - pos; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2418 | match = (!xmlStrncmp(&cur->content[pos], string, sub)); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2419 | if (match) { |
| 2420 | #ifdef DEBUG_RANGES |
| 2421 | xmlGenericError(xmlGenericErrorContext, |
| 2422 | "found subrange %d bytes at index %d of ->", |
| 2423 | sub, pos + 1); |
| 2424 | xmlDebugDumpString(stdout, cur->content); |
| 2425 | xmlGenericError(xmlGenericErrorContext, "\n"); |
| 2426 | #endif |
| 2427 | string = &string[sub]; |
| 2428 | stringlen -= sub; |
| 2429 | } else { |
| 2430 | return(0); |
| 2431 | } |
| 2432 | } |
| 2433 | } |
| 2434 | cur = xmlXPtrAdvanceNode(cur); |
| 2435 | if (cur == NULL) |
| 2436 | return(0); |
| 2437 | pos = 0; |
| 2438 | } |
| 2439 | return(1); |
| 2440 | } |
| 2441 | |
| 2442 | /** |
| 2443 | * xmlXPtrSearchString: |
| 2444 | * @string: the string to search |
| 2445 | * @start: the start textnode IN/OUT |
| 2446 | * @startindex: the start index IN/OUT |
| 2447 | * @end: the end textnode |
| 2448 | * @endindex: the end index |
| 2449 | * |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 2450 | * Search the next occurrence of @string within the document content |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2451 | * until the (@end, @endindex) point is reached |
| 2452 | * |
| 2453 | * Returns -1 in case of failure, 0 if not found, 1 if found in which case |
| 2454 | * (@start, @startindex) will indicate the position of the beginning |
Daniel Veillard | cbaf399 | 2001-12-31 16:16:02 +0000 | [diff] [blame] | 2455 | * of the range and (@end, @endindex) will indicate the end |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2456 | * of the range |
| 2457 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2458 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2459 | xmlXPtrSearchString(const xmlChar *string, xmlNodePtr *start, int *startindex, |
| 2460 | xmlNodePtr *end, int *endindex) { |
| 2461 | xmlNodePtr cur; |
| 2462 | const xmlChar *str; |
| 2463 | int pos; /* 0 based */ |
| 2464 | int len; /* in bytes */ |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2465 | xmlChar first; |
| 2466 | |
| 2467 | if (string == NULL) |
| 2468 | return(-1); |
| 2469 | if ((start == NULL) || (startindex == NULL)) |
| 2470 | return(-1); |
| 2471 | if ((end == NULL) || (endindex == NULL)) |
| 2472 | return(-1); |
| 2473 | cur = *start; |
| 2474 | if (cur == NULL) |
| 2475 | return(-1); |
| 2476 | pos = *startindex - 1; |
| 2477 | first = string[0]; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2478 | |
| 2479 | while (cur != NULL) { |
Daniel Veillard | 7db3773 | 2001-07-12 01:20:08 +0000 | [diff] [blame] | 2480 | if ((cur->type != XML_ELEMENT_NODE) && (cur->content != NULL)) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2481 | len = xmlStrlen(cur->content); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2482 | while (pos <= len) { |
| 2483 | if (first != 0) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2484 | str = xmlStrchr(&cur->content[pos], first); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2485 | if (str != NULL) { |
| 2486 | pos = (str - (xmlChar *)(cur->content)); |
| 2487 | #ifdef DEBUG_RANGES |
| 2488 | xmlGenericError(xmlGenericErrorContext, |
| 2489 | "found '%c' at index %d of ->", |
| 2490 | first, pos + 1); |
| 2491 | xmlDebugDumpString(stdout, cur->content); |
| 2492 | xmlGenericError(xmlGenericErrorContext, "\n"); |
| 2493 | #endif |
| 2494 | if (xmlXPtrMatchString(string, cur, pos + 1, |
| 2495 | end, endindex)) { |
| 2496 | *start = cur; |
| 2497 | *startindex = pos + 1; |
| 2498 | return(1); |
| 2499 | } |
| 2500 | pos++; |
| 2501 | } else { |
| 2502 | pos = len + 1; |
| 2503 | } |
| 2504 | } else { |
| 2505 | /* |
| 2506 | * An empty string is considered to match before each |
| 2507 | * character of the string-value and after the final |
| 2508 | * character. |
| 2509 | */ |
| 2510 | #ifdef DEBUG_RANGES |
| 2511 | xmlGenericError(xmlGenericErrorContext, |
| 2512 | "found '' at index %d of ->", |
| 2513 | pos + 1); |
| 2514 | xmlDebugDumpString(stdout, cur->content); |
| 2515 | xmlGenericError(xmlGenericErrorContext, "\n"); |
| 2516 | #endif |
| 2517 | *start = cur; |
| 2518 | *startindex = pos + 1; |
| 2519 | *end = cur; |
| 2520 | *endindex = pos + 1; |
| 2521 | return(1); |
| 2522 | } |
| 2523 | } |
| 2524 | } |
| 2525 | if ((cur == *end) && (pos >= *endindex)) |
| 2526 | return(0); |
| 2527 | cur = xmlXPtrAdvanceNode(cur); |
| 2528 | if (cur == NULL) |
| 2529 | return(0); |
| 2530 | pos = 1; |
| 2531 | } |
| 2532 | return(0); |
| 2533 | } |
| 2534 | |
| 2535 | /** |
| 2536 | * xmlXPtrGetLastChar: |
| 2537 | * @node: the node |
| 2538 | * @index: the index |
| 2539 | * |
| 2540 | * Computes the point coordinates of the last char of this point |
| 2541 | * |
| 2542 | * Returns -1 in case of failure, 0 otherwise |
| 2543 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2544 | static int |
| 2545 | xmlXPtrGetLastChar(xmlNodePtr *node, int *indx) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2546 | xmlNodePtr cur; |
| 2547 | int pos, len = 0; |
| 2548 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2549 | if ((node == NULL) || (indx == NULL)) |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2550 | return(-1); |
| 2551 | cur = *node; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2552 | pos = *indx; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2553 | |
| 2554 | if (cur == NULL) |
| 2555 | return(-1); |
| 2556 | |
| 2557 | if ((cur->type == XML_ELEMENT_NODE) || |
| 2558 | (cur->type == XML_DOCUMENT_NODE) || |
| 2559 | (cur->type == XML_HTML_DOCUMENT_NODE)) { |
| 2560 | if (pos > 0) { |
| 2561 | cur = xmlXPtrGetNthChild(cur, pos); |
| 2562 | pos = 0; |
| 2563 | } |
| 2564 | } |
| 2565 | while (cur != NULL) { |
| 2566 | if (cur->last != NULL) |
| 2567 | cur = cur->last; |
Daniel Veillard | 7db3773 | 2001-07-12 01:20:08 +0000 | [diff] [blame] | 2568 | else if ((cur->type != XML_ELEMENT_NODE) && |
| 2569 | (cur->content != NULL)) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2570 | len = xmlStrlen(cur->content); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2571 | break; |
| 2572 | } else { |
| 2573 | return(-1); |
| 2574 | } |
| 2575 | } |
| 2576 | if (cur == NULL) |
| 2577 | return(-1); |
| 2578 | *node = cur; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2579 | *indx = len; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2580 | return(0); |
| 2581 | } |
| 2582 | |
| 2583 | /** |
| 2584 | * xmlXPtrGetStartPoint: |
| 2585 | * @obj: an range |
| 2586 | * @node: the resulting node |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2587 | * @indx: the resulting index |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2588 | * |
| 2589 | * read the object and return the start point coordinates. |
| 2590 | * |
| 2591 | * Returns -1 in case of failure, 0 otherwise |
| 2592 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2593 | static int |
| 2594 | xmlXPtrGetStartPoint(xmlXPathObjectPtr obj, xmlNodePtr *node, int *indx) { |
| 2595 | if ((obj == NULL) || (node == NULL) || (indx == NULL)) |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2596 | return(-1); |
| 2597 | |
| 2598 | switch (obj->type) { |
| 2599 | case XPATH_POINT: |
| 2600 | *node = obj->user; |
| 2601 | if (obj->index <= 0) |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2602 | *indx = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2603 | else |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2604 | *indx = obj->index; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2605 | return(0); |
| 2606 | case XPATH_RANGE: |
| 2607 | *node = obj->user; |
| 2608 | if (obj->index <= 0) |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2609 | *indx = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2610 | else |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2611 | *indx = obj->index; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2612 | return(0); |
| 2613 | default: |
Daniel Veillard | b44025c | 2001-10-11 22:55:55 +0000 | [diff] [blame] | 2614 | break; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2615 | } |
| 2616 | return(-1); |
| 2617 | } |
| 2618 | |
| 2619 | /** |
| 2620 | * xmlXPtrGetEndPoint: |
| 2621 | * @obj: an range |
| 2622 | * @node: the resulting node |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2623 | * @indx: the resulting indx |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2624 | * |
| 2625 | * read the object and return the end point coordinates. |
| 2626 | * |
| 2627 | * Returns -1 in case of failure, 0 otherwise |
| 2628 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2629 | static int |
| 2630 | xmlXPtrGetEndPoint(xmlXPathObjectPtr obj, xmlNodePtr *node, int *indx) { |
| 2631 | if ((obj == NULL) || (node == NULL) || (indx == NULL)) |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2632 | return(-1); |
| 2633 | |
| 2634 | switch (obj->type) { |
| 2635 | case XPATH_POINT: |
| 2636 | *node = obj->user; |
| 2637 | if (obj->index <= 0) |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2638 | *indx = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2639 | else |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2640 | *indx = obj->index; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2641 | return(0); |
| 2642 | case XPATH_RANGE: |
| 2643 | *node = obj->user; |
| 2644 | if (obj->index <= 0) |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2645 | *indx = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2646 | else |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2647 | *indx = obj->index; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2648 | return(0); |
| 2649 | default: |
Daniel Veillard | b44025c | 2001-10-11 22:55:55 +0000 | [diff] [blame] | 2650 | break; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2651 | } |
| 2652 | return(-1); |
| 2653 | } |
| 2654 | |
| 2655 | /** |
| 2656 | * xmlXPtrStringRangeFunction: |
| 2657 | * @ctxt: the XPointer Parser context |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2658 | * @nargs: the number of args |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2659 | * |
| 2660 | * Function implementing the string-range() function |
| 2661 | * range as described in 5.4.2 |
| 2662 | * |
| 2663 | * ------------------------------ |
| 2664 | * [Definition: For each location in the location-set argument, |
| 2665 | * string-range returns a set of string ranges, a set of substrings in a |
| 2666 | * string. Specifically, the string-value of the location is searched for |
| 2667 | * substrings that match the string argument, and the resulting location-set |
| 2668 | * will contain a range location for each non-overlapping match.] |
| 2669 | * An empty string is considered to match before each character of the |
| 2670 | * string-value and after the final character. Whitespace in a string |
| 2671 | * is matched literally, with no normalization except that provided by |
| 2672 | * XML for line ends. The third argument gives the position of the first |
| 2673 | * character to be in the resulting range, relative to the start of the |
| 2674 | * match. The default value is 1, which makes the range start immediately |
| 2675 | * before the first character of the matched string. The fourth argument |
| 2676 | * gives the number of characters in the range; the default is that the |
| 2677 | * range extends to the end of the matched string. |
| 2678 | * |
| 2679 | * Element boundaries, as well as entire embedded nodes such as processing |
| 2680 | * instructions and comments, are ignored as defined in [XPath]. |
| 2681 | * |
| 2682 | * If the string in the second argument is not found in the string-value |
| 2683 | * of the location, or if a value in the third or fourth argument indicates |
| 2684 | * a string that is beyond the beginning or end of the document, the |
| 2685 | * expression fails. |
| 2686 | * |
| 2687 | * The points of the range-locations in the returned location-set will |
| 2688 | * all be character points. |
| 2689 | * ------------------------------ |
| 2690 | */ |
| 2691 | void |
| 2692 | xmlXPtrStringRangeFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 2693 | int i, startindex, endindex, fendindex; |
| 2694 | xmlNodePtr start, end, fend; |
| 2695 | xmlXPathObjectPtr set; |
| 2696 | xmlLocationSetPtr oldset; |
| 2697 | xmlLocationSetPtr newset; |
| 2698 | xmlXPathObjectPtr string; |
| 2699 | xmlXPathObjectPtr position = NULL; |
| 2700 | xmlXPathObjectPtr number = NULL; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2701 | int found, pos = 0, num = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2702 | |
| 2703 | /* |
| 2704 | * Grab the arguments |
| 2705 | */ |
| 2706 | if ((nargs < 2) || (nargs > 4)) |
| 2707 | XP_ERROR(XPATH_INVALID_ARITY); |
| 2708 | |
| 2709 | if (nargs >= 4) { |
| 2710 | CHECK_TYPE(XPATH_NUMBER); |
| 2711 | number = valuePop(ctxt); |
| 2712 | if (number != NULL) |
Daniel Veillard | 87ee914 | 2001-06-28 12:54:16 +0000 | [diff] [blame] | 2713 | num = (int) number->floatval; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2714 | } |
| 2715 | if (nargs >= 3) { |
| 2716 | CHECK_TYPE(XPATH_NUMBER); |
| 2717 | position = valuePop(ctxt); |
| 2718 | if (position != NULL) |
Daniel Veillard | 87ee914 | 2001-06-28 12:54:16 +0000 | [diff] [blame] | 2719 | pos = (int) position->floatval; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2720 | } |
| 2721 | CHECK_TYPE(XPATH_STRING); |
| 2722 | string = valuePop(ctxt); |
| 2723 | if ((ctxt->value == NULL) || |
| 2724 | ((ctxt->value->type != XPATH_LOCATIONSET) && |
| 2725 | (ctxt->value->type != XPATH_NODESET))) |
| 2726 | XP_ERROR(XPATH_INVALID_TYPE) |
| 2727 | |
| 2728 | set = valuePop(ctxt); |
| 2729 | if (set->type == XPATH_NODESET) { |
| 2730 | xmlXPathObjectPtr tmp; |
| 2731 | |
| 2732 | /* |
| 2733 | * First convert to a location set |
| 2734 | */ |
| 2735 | tmp = xmlXPtrNewLocationSetNodeSet(set->nodesetval); |
| 2736 | xmlXPathFreeObject(set); |
| 2737 | set = tmp; |
| 2738 | } |
| 2739 | oldset = (xmlLocationSetPtr) set->user; |
| 2740 | |
| 2741 | /* |
| 2742 | * The loop is to search for each element in the location set |
| 2743 | * the list of location set corresponding to that search |
| 2744 | */ |
| 2745 | newset = xmlXPtrLocationSetCreate(NULL); |
| 2746 | for (i = 0;i < oldset->locNr;i++) { |
| 2747 | #ifdef DEBUG_RANGES |
| 2748 | xmlXPathDebugDumpObject(stdout, oldset->locTab[i], 0); |
| 2749 | #endif |
| 2750 | |
| 2751 | xmlXPtrGetStartPoint(oldset->locTab[i], &start, &startindex); |
| 2752 | xmlXPtrGetEndPoint(oldset->locTab[i], &end, &endindex); |
| 2753 | xmlXPtrAdvanceChar(&start, &startindex, 0); |
| 2754 | xmlXPtrGetLastChar(&end, &endindex); |
| 2755 | |
| 2756 | #ifdef DEBUG_RANGES |
| 2757 | xmlGenericError(xmlGenericErrorContext, |
| 2758 | "from index %d of ->", startindex); |
| 2759 | xmlDebugDumpString(stdout, start->content); |
| 2760 | xmlGenericError(xmlGenericErrorContext, "\n"); |
| 2761 | xmlGenericError(xmlGenericErrorContext, |
| 2762 | "to index %d of ->", endindex); |
| 2763 | xmlDebugDumpString(stdout, end->content); |
| 2764 | xmlGenericError(xmlGenericErrorContext, "\n"); |
| 2765 | #endif |
| 2766 | do { |
| 2767 | fend = end; |
| 2768 | fendindex = endindex; |
| 2769 | found = xmlXPtrSearchString(string->stringval, &start, &startindex, |
| 2770 | &fend, &fendindex); |
| 2771 | if (found == 1) { |
| 2772 | if (position == NULL) { |
| 2773 | xmlXPtrLocationSetAdd(newset, |
| 2774 | xmlXPtrNewRange(start, startindex, fend, fendindex)); |
| 2775 | } else if (xmlXPtrAdvanceChar(&start, &startindex, |
| 2776 | pos - 1) == 0) { |
| 2777 | if ((number != NULL) && (num > 0)) { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2778 | int rindx; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2779 | xmlNodePtr rend; |
| 2780 | rend = start; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2781 | rindx = startindex - 1; |
| 2782 | if (xmlXPtrAdvanceChar(&rend, &rindx, |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2783 | num) == 0) { |
| 2784 | xmlXPtrLocationSetAdd(newset, |
| 2785 | xmlXPtrNewRange(start, startindex, |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2786 | rend, rindx)); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2787 | } |
| 2788 | } else if ((number != NULL) && (num <= 0)) { |
| 2789 | xmlXPtrLocationSetAdd(newset, |
| 2790 | xmlXPtrNewRange(start, startindex, |
| 2791 | start, startindex)); |
| 2792 | } else { |
| 2793 | xmlXPtrLocationSetAdd(newset, |
| 2794 | xmlXPtrNewRange(start, startindex, |
| 2795 | fend, fendindex)); |
| 2796 | } |
| 2797 | } |
| 2798 | start = fend; |
| 2799 | startindex = fendindex; |
| 2800 | if (string->stringval[0] == 0) |
| 2801 | startindex++; |
| 2802 | } |
| 2803 | } while (found == 1); |
| 2804 | } |
| 2805 | |
| 2806 | /* |
| 2807 | * Save the new value and cleanup |
| 2808 | */ |
| 2809 | valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); |
| 2810 | xmlXPathFreeObject(set); |
| 2811 | xmlXPathFreeObject(string); |
| 2812 | if (position) xmlXPathFreeObject(position); |
| 2813 | if (number) xmlXPathFreeObject(number); |
| 2814 | } |
| 2815 | |
| 2816 | /** |
| 2817 | * xmlXPtrEvalRangePredicate: |
| 2818 | * @ctxt: the XPointer Parser context |
| 2819 | * |
| 2820 | * [8] Predicate ::= '[' PredicateExpr ']' |
| 2821 | * [9] PredicateExpr ::= Expr |
| 2822 | * |
| 2823 | * Evaluate a predicate as in xmlXPathEvalPredicate() but for |
| 2824 | * a Location Set instead of a node set |
| 2825 | */ |
| 2826 | void |
| 2827 | xmlXPtrEvalRangePredicate(xmlXPathParserContextPtr ctxt) { |
| 2828 | const xmlChar *cur; |
| 2829 | xmlXPathObjectPtr res; |
| 2830 | xmlXPathObjectPtr obj, tmp; |
| 2831 | xmlLocationSetPtr newset = NULL; |
| 2832 | xmlLocationSetPtr oldset; |
| 2833 | int i; |
| 2834 | |
| 2835 | SKIP_BLANKS; |
| 2836 | if (CUR != '[') { |
| 2837 | XP_ERROR(XPATH_INVALID_PREDICATE_ERROR); |
| 2838 | } |
| 2839 | NEXT; |
| 2840 | SKIP_BLANKS; |
| 2841 | |
| 2842 | /* |
| 2843 | * Extract the old set, and then evaluate the result of the |
| 2844 | * expression for all the element in the set. use it to grow |
| 2845 | * up a new set. |
| 2846 | */ |
| 2847 | CHECK_TYPE(XPATH_LOCATIONSET); |
| 2848 | obj = valuePop(ctxt); |
| 2849 | oldset = obj->user; |
| 2850 | ctxt->context->node = NULL; |
| 2851 | |
| 2852 | if ((oldset == NULL) || (oldset->locNr == 0)) { |
| 2853 | ctxt->context->contextSize = 0; |
| 2854 | ctxt->context->proximityPosition = 0; |
| 2855 | xmlXPathEvalExpr(ctxt); |
| 2856 | res = valuePop(ctxt); |
| 2857 | if (res != NULL) |
| 2858 | xmlXPathFreeObject(res); |
| 2859 | valuePush(ctxt, obj); |
| 2860 | CHECK_ERROR; |
| 2861 | } else { |
| 2862 | /* |
| 2863 | * Save the expression pointer since we will have to evaluate |
| 2864 | * it multiple times. Initialize the new set. |
| 2865 | */ |
| 2866 | cur = ctxt->cur; |
| 2867 | newset = xmlXPtrLocationSetCreate(NULL); |
| 2868 | |
| 2869 | for (i = 0; i < oldset->locNr; i++) { |
| 2870 | ctxt->cur = cur; |
| 2871 | |
| 2872 | /* |
| 2873 | * Run the evaluation with a node list made of a single item |
| 2874 | * in the nodeset. |
| 2875 | */ |
| 2876 | ctxt->context->node = oldset->locTab[i]->user; |
| 2877 | tmp = xmlXPathNewNodeSet(ctxt->context->node); |
| 2878 | valuePush(ctxt, tmp); |
| 2879 | ctxt->context->contextSize = oldset->locNr; |
| 2880 | ctxt->context->proximityPosition = i + 1; |
| 2881 | |
| 2882 | xmlXPathEvalExpr(ctxt); |
| 2883 | CHECK_ERROR; |
| 2884 | |
| 2885 | /* |
| 2886 | * The result of the evaluation need to be tested to |
| 2887 | * decided whether the filter succeeded or not |
| 2888 | */ |
| 2889 | res = valuePop(ctxt); |
| 2890 | if (xmlXPathEvaluatePredicateResult(ctxt, res)) { |
| 2891 | xmlXPtrLocationSetAdd(newset, |
| 2892 | xmlXPathObjectCopy(oldset->locTab[i])); |
| 2893 | } |
| 2894 | |
| 2895 | /* |
| 2896 | * Cleanup |
| 2897 | */ |
| 2898 | if (res != NULL) |
| 2899 | xmlXPathFreeObject(res); |
| 2900 | if (ctxt->value == tmp) { |
| 2901 | res = valuePop(ctxt); |
| 2902 | xmlXPathFreeObject(res); |
| 2903 | } |
| 2904 | |
| 2905 | ctxt->context->node = NULL; |
| 2906 | } |
| 2907 | |
| 2908 | /* |
| 2909 | * The result is used as the new evaluation set. |
| 2910 | */ |
| 2911 | xmlXPathFreeObject(obj); |
| 2912 | ctxt->context->node = NULL; |
| 2913 | ctxt->context->contextSize = -1; |
| 2914 | ctxt->context->proximityPosition = -1; |
| 2915 | valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); |
| 2916 | } |
| 2917 | if (CUR != ']') { |
| 2918 | XP_ERROR(XPATH_INVALID_PREDICATE_ERROR); |
| 2919 | } |
| 2920 | |
| 2921 | NEXT; |
| 2922 | SKIP_BLANKS; |
| 2923 | } |
| 2924 | |
| 2925 | #else |
| 2926 | #endif |
| 2927 | |