Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1 | /* |
| 2 | * xpath.c: XML Path Language implementation |
| 3 | * XPath is a language for addressing parts of an XML document, |
| 4 | * designed to be used by both XSLT and XPointer |
| 5 | * |
| 6 | * Reference: W3C Recommendation 16 November 1999 |
| 7 | * http://www.w3.org/TR/1999/REC-xpath-19991116 |
| 8 | * Public reference: |
| 9 | * http://www.w3.org/TR/xpath |
| 10 | * |
| 11 | * See COPYRIGHT for the status of this software |
| 12 | * |
| 13 | * Author: Daniel.Veillard@w3.org |
| 14 | * |
| 15 | * 14 Nov 2000 ht - truncated declaration of xmlXPathEvalRelativeLocationPath |
| 16 | * for VMS |
| 17 | */ |
| 18 | |
| 19 | #ifdef WIN32 |
| 20 | #include "win32config.h" |
| 21 | #else |
| 22 | #include "config.h" |
| 23 | #endif |
| 24 | |
| 25 | #include <libxml/xmlversion.h> |
| 26 | #ifdef LIBXML_XPATH_ENABLED |
| 27 | |
| 28 | #include <stdio.h> |
| 29 | #include <string.h> |
| 30 | |
| 31 | #ifdef HAVE_SYS_TYPES_H |
| 32 | #include <sys/types.h> |
| 33 | #endif |
| 34 | #ifdef HAVE_MATH_H |
| 35 | #include <math.h> |
| 36 | #endif |
| 37 | #ifdef HAVE_FLOAT_H |
| 38 | #include <float.h> |
| 39 | #endif |
| 40 | #ifdef HAVE_IEEEFP_H |
| 41 | #include <ieeefp.h> |
| 42 | #endif |
| 43 | #ifdef HAVE_NAN_H |
| 44 | #include <nan.h> |
| 45 | #endif |
| 46 | #ifdef HAVE_CTYPE_H |
| 47 | #include <ctype.h> |
| 48 | #endif |
| 49 | |
| 50 | #include <libxml/xmlmemory.h> |
| 51 | #include <libxml/tree.h> |
| 52 | #include <libxml/valid.h> |
| 53 | #include <libxml/xpath.h> |
| 54 | #include <libxml/xpathInternals.h> |
| 55 | #include <libxml/parserInternals.h> |
| 56 | #include <libxml/hash.h> |
| 57 | #ifdef LIBXML_XPTR_ENABLED |
| 58 | #include <libxml/xpointer.h> |
| 59 | #endif |
| 60 | #ifdef LIBXML_DEBUG_ENABLED |
| 61 | #include <libxml/debugXML.h> |
| 62 | #endif |
| 63 | #include <libxml/xmlerror.h> |
| 64 | |
| 65 | /* #define DEBUG */ |
| 66 | /* #define DEBUG_STEP */ |
| 67 | /* #define DEBUG_EXPR */ |
| 68 | |
| 69 | void xmlXPathStringFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 70 | double xmlXPathStringEvalNumber(const xmlChar *str); |
| 71 | |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 72 | /************************************************************************ |
| 73 | * * |
| 74 | * Floating point stuff * |
| 75 | * * |
| 76 | ************************************************************************/ |
| 77 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 78 | /* |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 79 | * The lack of portability of this section of the libc is annoying ! |
| 80 | */ |
| 81 | double xmlXPathNAN = 0; |
| 82 | double xmlXPathPINF = 1; |
| 83 | double xmlXPathNINF = -1; |
| 84 | |
| 85 | #ifndef isinf |
| 86 | #ifndef HAVE_ISINF |
| 87 | |
| 88 | #if HAVE_FPCLASS |
| 89 | |
| 90 | int isinf(double d) { |
| 91 | fpclass_t type = fpclass(d); |
| 92 | switch (type) { |
| 93 | case FP_NINF: |
| 94 | return(-1); |
| 95 | case FP_PINF: |
| 96 | return(1); |
| 97 | } |
| 98 | return(0); |
| 99 | } |
| 100 | |
| 101 | #elif defined(HAVE_FP_CLASS) || defined(HAVE_FP_CLASS_D) |
| 102 | |
| 103 | #if HAVE_FP_CLASS_H |
| 104 | #include <fp_class.h> |
| 105 | #endif |
| 106 | |
| 107 | int isinf(double d) { |
| 108 | #if HAVE_FP_CLASS |
| 109 | int fpclass = fp_class(d); |
| 110 | #else |
| 111 | int fpclass = fp_class_d(d); |
| 112 | #endif |
| 113 | if (fpclass == FP_POS_INF) |
| 114 | return(1); |
| 115 | if (fpclass == FP_NEG_INF) |
| 116 | return(-1); |
| 117 | return(0); |
| 118 | } |
| 119 | |
| 120 | #elif defined(HAVE_CLASS) |
| 121 | |
| 122 | int isinf(double d) { |
| 123 | int fpclass = class(d); |
| 124 | if (fpclass == FP_PLUS_INF) |
| 125 | return(1); |
| 126 | if (fpclass == FP_MINUS_INF) |
| 127 | return(-1); |
| 128 | return(0); |
| 129 | } |
| 130 | #elif defined(finite) || defined(HAVE_FINITE) |
| 131 | int isinf(double x) { return !finite(x) && x==x; } |
| 132 | #elif defined(HUGE_VAL) |
| 133 | int isinf(double x) |
| 134 | { |
| 135 | if (x == HUGE_VAL) |
| 136 | return(1); |
| 137 | if (x == -HUGE_VAL) |
| 138 | return(-1); |
| 139 | return(0); |
| 140 | } |
| 141 | #endif |
| 142 | |
| 143 | #endif /* ! HAVE_ISINF */ |
| 144 | #endif /* ! defined(isinf) */ |
| 145 | |
| 146 | #ifndef isnan |
| 147 | #ifndef HAVE_ISNAN |
| 148 | |
| 149 | #ifdef HAVE_ISNAND |
| 150 | #define isnan(f) isnand(f) |
| 151 | #endif /* HAVE_iSNAND */ |
| 152 | |
| 153 | #endif /* ! HAVE_iSNAN */ |
| 154 | #endif /* ! defined(isnan) */ |
| 155 | |
| 156 | /** |
| 157 | * xmlXPathInit: |
| 158 | * |
| 159 | * Initialize the XPath environment |
| 160 | */ |
| 161 | void |
| 162 | xmlXPathInit(void) { |
| 163 | static int initialized = 0; |
| 164 | |
| 165 | if (initialized) return; |
| 166 | |
| 167 | xmlXPathNAN = 0; |
| 168 | xmlXPathNAN /= 0; |
| 169 | |
| 170 | xmlXPathPINF = 1; |
| 171 | xmlXPathPINF /= 0; |
| 172 | |
| 173 | xmlXPathNINF = -1; |
| 174 | xmlXPathNINF /= 0; |
| 175 | |
| 176 | initialized = 1; |
| 177 | } |
| 178 | |
| 179 | /************************************************************************ |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 180 | * * |
| 181 | * Parser Types * |
| 182 | * * |
| 183 | ************************************************************************/ |
| 184 | |
| 185 | /* |
| 186 | * Types are private: |
| 187 | */ |
| 188 | |
| 189 | typedef enum { |
| 190 | XPATH_OP_END=0, |
| 191 | XPATH_OP_AND, |
| 192 | XPATH_OP_OR, |
| 193 | XPATH_OP_EQUAL, |
| 194 | XPATH_OP_CMP, |
| 195 | XPATH_OP_PLUS, |
| 196 | XPATH_OP_MULT, |
| 197 | XPATH_OP_UNION, |
| 198 | XPATH_OP_ROOT, |
| 199 | XPATH_OP_NODE, |
| 200 | XPATH_OP_RESET, |
| 201 | XPATH_OP_COLLECT, |
| 202 | XPATH_OP_VALUE, |
| 203 | XPATH_OP_VARIABLE, |
| 204 | XPATH_OP_FUNCTION, |
| 205 | XPATH_OP_ARG, |
| 206 | XPATH_OP_PREDICATE, |
| 207 | XPATH_OP_SORT |
| 208 | #ifdef LIBXML_XPTR_ENABLED |
| 209 | ,XPATH_OP_RANGETO |
| 210 | #endif |
| 211 | } xmlXPathOp; |
| 212 | |
| 213 | typedef enum { |
| 214 | AXIS_ANCESTOR = 1, |
| 215 | AXIS_ANCESTOR_OR_SELF, |
| 216 | AXIS_ATTRIBUTE, |
| 217 | AXIS_CHILD, |
| 218 | AXIS_DESCENDANT, |
| 219 | AXIS_DESCENDANT_OR_SELF, |
| 220 | AXIS_FOLLOWING, |
| 221 | AXIS_FOLLOWING_SIBLING, |
| 222 | AXIS_NAMESPACE, |
| 223 | AXIS_PARENT, |
| 224 | AXIS_PRECEDING, |
| 225 | AXIS_PRECEDING_SIBLING, |
| 226 | AXIS_SELF |
| 227 | } xmlXPathAxisVal; |
| 228 | |
| 229 | typedef enum { |
| 230 | NODE_TEST_NONE = 0, |
| 231 | NODE_TEST_TYPE = 1, |
| 232 | NODE_TEST_PI = 2, |
| 233 | NODE_TEST_ALL = 3, |
| 234 | NODE_TEST_NS = 4, |
| 235 | NODE_TEST_NAME = 5 |
| 236 | } xmlXPathTestVal; |
| 237 | |
| 238 | typedef enum { |
| 239 | NODE_TYPE_NODE = 0, |
| 240 | NODE_TYPE_COMMENT = XML_COMMENT_NODE, |
| 241 | NODE_TYPE_TEXT = XML_TEXT_NODE, |
| 242 | NODE_TYPE_PI = XML_PI_NODE |
| 243 | } xmlXPathTypeVal; |
| 244 | |
| 245 | |
| 246 | typedef struct _xmlXPathStepOp xmlXPathStepOp; |
| 247 | typedef xmlXPathStepOp *xmlXPathStepOpPtr; |
| 248 | struct _xmlXPathStepOp { |
| 249 | xmlXPathOp op; |
| 250 | int ch1; |
| 251 | int ch2; |
| 252 | int value; |
| 253 | int value2; |
| 254 | int value3; |
| 255 | void *value4; |
| 256 | void *value5; |
| 257 | }; |
| 258 | |
| 259 | struct _xmlXPathCompExpr { |
| 260 | int nbStep; |
| 261 | int maxStep; |
| 262 | xmlXPathStepOp *steps; /* ops for computation */ |
| 263 | int last; |
| 264 | }; |
| 265 | |
| 266 | /************************************************************************ |
| 267 | * * |
| 268 | * Parser Type functions * |
| 269 | * * |
| 270 | ************************************************************************/ |
| 271 | |
| 272 | /** |
| 273 | * xmlXPathNewCompExpr: |
| 274 | * |
| 275 | * Create a new Xpath component |
| 276 | * |
| 277 | * Returns the newly allocated xmlXPathCompExprPtr or NULL in case of error |
| 278 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 279 | static xmlXPathCompExprPtr |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 280 | xmlXPathNewCompExpr(void) { |
| 281 | xmlXPathCompExprPtr cur; |
| 282 | |
| 283 | cur = (xmlXPathCompExprPtr) xmlMalloc(sizeof(xmlXPathCompExpr)); |
| 284 | if (cur == NULL) { |
| 285 | xmlGenericError(xmlGenericErrorContext, |
| 286 | "xmlXPathNewCompExpr : malloc failed\n"); |
| 287 | return(NULL); |
| 288 | } |
| 289 | memset(cur, 0, sizeof(xmlXPathCompExpr)); |
| 290 | cur->maxStep = 10; |
| 291 | cur->nbStep = 0; |
| 292 | cur->steps = (xmlXPathStepOp *) xmlMalloc(cur->maxStep * |
| 293 | sizeof(xmlXPathStepOp)); |
| 294 | if (cur->steps == NULL) { |
| 295 | xmlGenericError(xmlGenericErrorContext, |
| 296 | "xmlXPathNewCompExpr : malloc failed\n"); |
| 297 | xmlFree(cur); |
| 298 | return(NULL); |
| 299 | } |
| 300 | memset(cur->steps, 0, cur->maxStep * sizeof(xmlXPathStepOp)); |
| 301 | cur->last = -1; |
| 302 | return(cur); |
| 303 | } |
| 304 | |
| 305 | /** |
| 306 | * xmlXPathFreeCompExpr: |
| 307 | * @comp: an XPATH comp |
| 308 | * |
| 309 | * Free up the memory allocated by @comp |
| 310 | */ |
| 311 | void |
| 312 | xmlXPathFreeCompExpr(xmlXPathCompExprPtr comp) { |
| 313 | xmlXPathStepOpPtr op; |
| 314 | int i; |
| 315 | |
| 316 | if (comp == NULL) |
| 317 | return; |
| 318 | for (i = 0;i < comp->nbStep;i++) { |
| 319 | op = &comp->steps[i]; |
| 320 | if (op->value4 != NULL) { |
| 321 | if (op->op == XPATH_OP_VALUE) |
| 322 | xmlXPathFreeObject(op->value4); |
| 323 | else |
| 324 | xmlFree(op->value4); |
| 325 | } |
| 326 | if (op->value5 != NULL) |
| 327 | xmlFree(op->value5); |
| 328 | } |
| 329 | if (comp->steps != NULL) { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 330 | xmlFree(comp->steps); |
| 331 | } |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 332 | xmlFree(comp); |
| 333 | } |
| 334 | |
| 335 | /** |
| 336 | * xmlXPathCompExprAdd: |
| 337 | * @comp: the compiled expression |
| 338 | * @ch1: first child index |
| 339 | * @ch2: second child index |
| 340 | * @op: an op |
| 341 | * @value: the first int value |
| 342 | * @value2: the second int value |
| 343 | * @value3: the third int value |
| 344 | * @value4: the first string value |
| 345 | * @value5: the second string value |
| 346 | * |
| 347 | * Add an step to an XPath Compiled Expression |
| 348 | * |
| 349 | * Returns -1 in case of failure, the index otherwise |
| 350 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 351 | static int |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 352 | xmlXPathCompExprAdd(xmlXPathCompExprPtr comp, int ch1, int ch2, |
| 353 | xmlXPathOp op, int value, |
| 354 | int value2, int value3, void *value4, void *value5) { |
| 355 | if (comp->nbStep >= comp->maxStep) { |
| 356 | xmlXPathStepOp *real; |
| 357 | |
| 358 | comp->maxStep *= 2; |
| 359 | real = (xmlXPathStepOp *) xmlRealloc(comp->steps, |
| 360 | comp->maxStep * sizeof(xmlXPathStepOp)); |
| 361 | if (real == NULL) { |
| 362 | comp->maxStep /= 2; |
| 363 | xmlGenericError(xmlGenericErrorContext, |
| 364 | "xmlXPathCompExprAdd : realloc failed\n"); |
| 365 | return(-1); |
| 366 | } |
| 367 | comp->steps = real; |
| 368 | } |
| 369 | comp->last = comp->nbStep; |
| 370 | comp->steps[comp->nbStep].ch1 = ch1; |
| 371 | comp->steps[comp->nbStep].ch2 = ch2; |
| 372 | comp->steps[comp->nbStep].op = op; |
| 373 | comp->steps[comp->nbStep].value = value; |
| 374 | comp->steps[comp->nbStep].value2 = value2; |
| 375 | comp->steps[comp->nbStep].value3 = value3; |
| 376 | comp->steps[comp->nbStep].value4 = value4; |
| 377 | comp->steps[comp->nbStep].value5 = value5; |
| 378 | return(comp->nbStep++); |
| 379 | } |
| 380 | |
| 381 | #define PUSH_LONG_EXPR(op, val, val2, val3, val4, val5) \ |
| 382 | xmlXPathCompExprAdd(ctxt->comp, ctxt->comp->last, -1, \ |
| 383 | (op), (val), (val2), (val3), (val4), (val5)) |
| 384 | |
| 385 | #define PUSH_LEAVE_EXPR(op, val, val2) \ |
| 386 | xmlXPathCompExprAdd(ctxt->comp, -1, -1, (op), (val), (val2), 0 ,NULL ,NULL) |
| 387 | |
| 388 | #define PUSH_UNARY_EXPR(op, ch, val, val2) \ |
| 389 | xmlXPathCompExprAdd(ctxt->comp, (ch), -1, (op), (val), (val2), 0 ,NULL ,NULL) |
| 390 | |
| 391 | #define PUSH_BINARY_EXPR(op, ch1, ch2, val, val2) \ |
| 392 | xmlXPathCompExprAdd(ctxt->comp, (ch1), (ch2), (op), (val), (val2), 0 ,NULL ,NULL) |
| 393 | |
| 394 | /************************************************************************ |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 395 | * * |
| 396 | * Debugging related functions * |
| 397 | * * |
| 398 | ************************************************************************/ |
| 399 | |
| 400 | #define TODO \ |
| 401 | xmlGenericError(xmlGenericErrorContext, \ |
| 402 | "Unimplemented block at %s:%d\n", \ |
| 403 | __FILE__, __LINE__); |
| 404 | |
| 405 | #define STRANGE \ |
| 406 | xmlGenericError(xmlGenericErrorContext, \ |
| 407 | "Internal error at %s:%d\n", \ |
| 408 | __FILE__, __LINE__); |
| 409 | |
| 410 | #ifdef LIBXML_DEBUG_ENABLED |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 411 | static void |
| 412 | xmlXPathDebugDumpNode(FILE *output, xmlNodePtr cur, int depth) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 413 | int i; |
| 414 | char shift[100]; |
| 415 | |
| 416 | for (i = 0;((i < depth) && (i < 25));i++) |
| 417 | shift[2 * i] = shift[2 * i + 1] = ' '; |
| 418 | shift[2 * i] = shift[2 * i + 1] = 0; |
| 419 | if (cur == NULL) { |
| 420 | fprintf(output, shift); |
| 421 | fprintf(output, "Node is NULL !\n"); |
| 422 | return; |
| 423 | |
| 424 | } |
| 425 | |
| 426 | if ((cur->type == XML_DOCUMENT_NODE) || |
| 427 | (cur->type == XML_HTML_DOCUMENT_NODE)) { |
| 428 | fprintf(output, shift); |
| 429 | fprintf(output, " /\n"); |
| 430 | } else if (cur->type == XML_ATTRIBUTE_NODE) |
| 431 | xmlDebugDumpAttr(output, (xmlAttrPtr)cur, depth); |
| 432 | else |
| 433 | xmlDebugDumpOneNode(output, cur, depth); |
| 434 | } |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 435 | static void |
| 436 | xmlXPathDebugDumpNodeList(FILE *output, xmlNodePtr cur, int depth) { |
Daniel Veillard | f7cd481 | 2001-02-23 18:44:52 +0000 | [diff] [blame] | 437 | xmlNodePtr tmp; |
| 438 | int i; |
| 439 | char shift[100]; |
| 440 | |
| 441 | for (i = 0;((i < depth) && (i < 25));i++) |
| 442 | shift[2 * i] = shift[2 * i + 1] = ' '; |
| 443 | shift[2 * i] = shift[2 * i + 1] = 0; |
| 444 | if (cur == NULL) { |
| 445 | fprintf(output, shift); |
| 446 | fprintf(output, "Node is NULL !\n"); |
| 447 | return; |
| 448 | |
| 449 | } |
| 450 | |
| 451 | while (cur != NULL) { |
| 452 | tmp = cur; |
| 453 | cur = cur->next; |
| 454 | xmlDebugDumpOneNode(output, tmp, depth); |
| 455 | } |
| 456 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 457 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 458 | static void |
| 459 | xmlXPathDebugDumpNodeSet(FILE *output, xmlNodeSetPtr cur, int depth) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 460 | int i; |
| 461 | char shift[100]; |
| 462 | |
| 463 | for (i = 0;((i < depth) && (i < 25));i++) |
| 464 | shift[2 * i] = shift[2 * i + 1] = ' '; |
| 465 | shift[2 * i] = shift[2 * i + 1] = 0; |
| 466 | |
| 467 | if (cur == NULL) { |
| 468 | fprintf(output, shift); |
| 469 | fprintf(output, "NodeSet is NULL !\n"); |
| 470 | return; |
| 471 | |
| 472 | } |
| 473 | |
| 474 | fprintf(output, "Set contains %d nodes:\n", cur->nodeNr); |
| 475 | for (i = 0;i < cur->nodeNr;i++) { |
| 476 | fprintf(output, shift); |
| 477 | fprintf(output, "%d", i + 1); |
| 478 | xmlXPathDebugDumpNode(output, cur->nodeTab[i], depth + 1); |
| 479 | } |
| 480 | } |
| 481 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 482 | static void |
| 483 | xmlXPathDebugDumpValueTree(FILE *output, xmlNodeSetPtr cur, int depth) { |
Daniel Veillard | f7cd481 | 2001-02-23 18:44:52 +0000 | [diff] [blame] | 484 | int i; |
| 485 | char shift[100]; |
| 486 | |
| 487 | for (i = 0;((i < depth) && (i < 25));i++) |
| 488 | shift[2 * i] = shift[2 * i + 1] = ' '; |
| 489 | shift[2 * i] = shift[2 * i + 1] = 0; |
| 490 | |
| 491 | if ((cur == NULL) || (cur->nodeNr == 0) || (cur->nodeTab[0] == NULL)) { |
| 492 | fprintf(output, shift); |
| 493 | fprintf(output, "Value Tree is NULL !\n"); |
| 494 | return; |
| 495 | |
| 496 | } |
| 497 | |
| 498 | fprintf(output, shift); |
| 499 | fprintf(output, "%d", i + 1); |
| 500 | xmlXPathDebugDumpNodeList(output, cur->nodeTab[0]->children, depth + 1); |
| 501 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 502 | #if defined(LIBXML_XPTR_ENABLED) |
| 503 | void xmlXPathDebugDumpObject(FILE *output, xmlXPathObjectPtr cur, int depth); |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 504 | static void |
| 505 | xmlXPathDebugDumpLocationSet(FILE *output, xmlLocationSetPtr cur, int depth) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 506 | int i; |
| 507 | char shift[100]; |
| 508 | |
| 509 | for (i = 0;((i < depth) && (i < 25));i++) |
| 510 | shift[2 * i] = shift[2 * i + 1] = ' '; |
| 511 | shift[2 * i] = shift[2 * i + 1] = 0; |
| 512 | |
| 513 | if (cur == NULL) { |
| 514 | fprintf(output, shift); |
| 515 | fprintf(output, "LocationSet is NULL !\n"); |
| 516 | return; |
| 517 | |
| 518 | } |
| 519 | |
| 520 | for (i = 0;i < cur->locNr;i++) { |
| 521 | fprintf(output, shift); |
| 522 | fprintf(output, "%d : ", i + 1); |
| 523 | xmlXPathDebugDumpObject(output, cur->locTab[i], depth + 1); |
| 524 | } |
| 525 | } |
| 526 | #endif |
| 527 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 528 | /** |
| 529 | * xmlXPathDebugDumpObject: |
| 530 | * @output: the FILE * to dump the output |
| 531 | * @cur: the object to inspect |
| 532 | * @depth: indentation level |
| 533 | * |
| 534 | * Dump the content of the object for debugging purposes |
| 535 | */ |
| 536 | void |
| 537 | xmlXPathDebugDumpObject(FILE *output, xmlXPathObjectPtr cur, int depth) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 538 | int i; |
| 539 | char shift[100]; |
| 540 | |
| 541 | for (i = 0;((i < depth) && (i < 25));i++) |
| 542 | shift[2 * i] = shift[2 * i + 1] = ' '; |
| 543 | shift[2 * i] = shift[2 * i + 1] = 0; |
| 544 | |
| 545 | fprintf(output, shift); |
| 546 | |
| 547 | if (cur == NULL) { |
| 548 | fprintf(output, "Object is empty (NULL)\n"); |
| 549 | return; |
| 550 | } |
| 551 | switch(cur->type) { |
| 552 | case XPATH_UNDEFINED: |
| 553 | fprintf(output, "Object is uninitialized\n"); |
| 554 | break; |
| 555 | case XPATH_NODESET: |
| 556 | fprintf(output, "Object is a Node Set :\n"); |
| 557 | xmlXPathDebugDumpNodeSet(output, cur->nodesetval, depth); |
| 558 | break; |
| 559 | case XPATH_XSLT_TREE: |
| 560 | fprintf(output, "Object is an XSLT value tree :\n"); |
Daniel Veillard | f7cd481 | 2001-02-23 18:44:52 +0000 | [diff] [blame] | 561 | xmlXPathDebugDumpValueTree(output, cur->nodesetval, depth); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 562 | break; |
| 563 | case XPATH_BOOLEAN: |
| 564 | fprintf(output, "Object is a Boolean : "); |
| 565 | if (cur->boolval) fprintf(output, "true\n"); |
| 566 | else fprintf(output, "false\n"); |
| 567 | break; |
| 568 | case XPATH_NUMBER: |
| 569 | fprintf(output, "Object is a number : %0g\n", cur->floatval); |
| 570 | break; |
| 571 | case XPATH_STRING: |
| 572 | fprintf(output, "Object is a string : "); |
| 573 | xmlDebugDumpString(output, cur->stringval); |
| 574 | fprintf(output, "\n"); |
| 575 | break; |
| 576 | case XPATH_POINT: |
| 577 | fprintf(output, "Object is a point : index %d in node", cur->index); |
| 578 | xmlXPathDebugDumpNode(output, (xmlNodePtr) cur->user, depth + 1); |
| 579 | fprintf(output, "\n"); |
| 580 | break; |
| 581 | case XPATH_RANGE: |
| 582 | if ((cur->user2 == NULL) || |
| 583 | ((cur->user2 == cur->user) && (cur->index == cur->index2))) { |
| 584 | fprintf(output, "Object is a collapsed range :\n"); |
| 585 | fprintf(output, shift); |
| 586 | if (cur->index >= 0) |
| 587 | fprintf(output, "index %d in ", cur->index); |
| 588 | fprintf(output, "node\n"); |
| 589 | xmlXPathDebugDumpNode(output, (xmlNodePtr) cur->user, |
| 590 | depth + 1); |
| 591 | } else { |
| 592 | fprintf(output, "Object is a range :\n"); |
| 593 | fprintf(output, shift); |
| 594 | fprintf(output, "From "); |
| 595 | if (cur->index >= 0) |
| 596 | fprintf(output, "index %d in ", cur->index); |
| 597 | fprintf(output, "node\n"); |
| 598 | xmlXPathDebugDumpNode(output, (xmlNodePtr) cur->user, |
| 599 | depth + 1); |
| 600 | fprintf(output, shift); |
| 601 | fprintf(output, "To "); |
| 602 | if (cur->index2 >= 0) |
| 603 | fprintf(output, "index %d in ", cur->index2); |
| 604 | fprintf(output, "node\n"); |
| 605 | xmlXPathDebugDumpNode(output, (xmlNodePtr) cur->user2, |
| 606 | depth + 1); |
| 607 | fprintf(output, "\n"); |
| 608 | } |
| 609 | break; |
| 610 | case XPATH_LOCATIONSET: |
| 611 | #if defined(LIBXML_XPTR_ENABLED) |
| 612 | fprintf(output, "Object is a Location Set:\n"); |
| 613 | xmlXPathDebugDumpLocationSet(output, |
| 614 | (xmlLocationSetPtr) cur->user, depth); |
| 615 | #endif |
| 616 | break; |
| 617 | case XPATH_USERS: |
| 618 | fprintf(output, "Object is user defined\n"); |
| 619 | break; |
| 620 | } |
| 621 | } |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 622 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 623 | static void |
| 624 | xmlXPathDebugDumpStepOp(FILE *output, xmlXPathCompExprPtr comp, |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 625 | xmlXPathStepOpPtr op, int depth) { |
| 626 | int i; |
| 627 | char shift[100]; |
| 628 | |
| 629 | for (i = 0;((i < depth) && (i < 25));i++) |
| 630 | shift[2 * i] = shift[2 * i + 1] = ' '; |
| 631 | shift[2 * i] = shift[2 * i + 1] = 0; |
| 632 | |
| 633 | fprintf(output, shift); |
| 634 | if (op == NULL) { |
| 635 | fprintf(output, "Step is NULL\n"); |
| 636 | return; |
| 637 | } |
| 638 | switch (op->op) { |
| 639 | case XPATH_OP_END: |
| 640 | fprintf(output, "END"); break; |
| 641 | case XPATH_OP_AND: |
| 642 | fprintf(output, "AND"); break; |
| 643 | case XPATH_OP_OR: |
| 644 | fprintf(output, "OR"); break; |
| 645 | case XPATH_OP_EQUAL: |
| 646 | if (op->value) |
| 647 | fprintf(output, "EQUAL ="); |
| 648 | else |
| 649 | fprintf(output, "EQUAL !="); |
| 650 | break; |
| 651 | case XPATH_OP_CMP: |
| 652 | if (op->value) |
| 653 | fprintf(output, "CMP <"); |
| 654 | else |
| 655 | fprintf(output, "CMP >"); |
| 656 | if (!op->value2) |
| 657 | fprintf(output, "="); |
| 658 | break; |
| 659 | case XPATH_OP_PLUS: |
| 660 | if (op->value == 0) |
| 661 | fprintf(output, "PLUS -"); |
| 662 | else if (op->value == 1) |
| 663 | fprintf(output, "PLUS +"); |
| 664 | else if (op->value == 2) |
| 665 | fprintf(output, "PLUS unary -"); |
| 666 | else if (op->value == 3) |
| 667 | fprintf(output, "PLUS unary - -"); |
| 668 | break; |
| 669 | case XPATH_OP_MULT: |
| 670 | if (op->value == 0) |
| 671 | fprintf(output, "MULT *"); |
| 672 | else if (op->value == 1) |
| 673 | fprintf(output, "MULT div"); |
| 674 | else |
| 675 | fprintf(output, "MULT mod"); |
| 676 | break; |
| 677 | case XPATH_OP_UNION: |
| 678 | fprintf(output, "UNION"); break; |
| 679 | case XPATH_OP_ROOT: |
| 680 | fprintf(output, "ROOT"); break; |
| 681 | case XPATH_OP_NODE: |
| 682 | fprintf(output, "NODE"); break; |
| 683 | case XPATH_OP_RESET: |
| 684 | fprintf(output, "RESET"); break; |
| 685 | case XPATH_OP_SORT: |
| 686 | fprintf(output, "SORT"); break; |
| 687 | case XPATH_OP_COLLECT: { |
| 688 | xmlXPathAxisVal axis = op->value; |
| 689 | xmlXPathTestVal test = op->value2; |
| 690 | xmlXPathTypeVal type = op->value3; |
| 691 | const xmlChar *prefix = op->value4; |
| 692 | const xmlChar *name = op->value5; |
| 693 | |
| 694 | fprintf(output, "COLLECT "); |
| 695 | switch (axis) { |
| 696 | case AXIS_ANCESTOR: |
| 697 | fprintf(output, " 'ancestors' "); break; |
| 698 | case AXIS_ANCESTOR_OR_SELF: |
| 699 | fprintf(output, " 'ancestors-or-self' "); break; |
| 700 | case AXIS_ATTRIBUTE: |
| 701 | fprintf(output, " 'attributes' "); break; |
| 702 | case AXIS_CHILD: |
| 703 | fprintf(output, " 'child' "); break; |
| 704 | case AXIS_DESCENDANT: |
| 705 | fprintf(output, " 'descendant' "); break; |
| 706 | case AXIS_DESCENDANT_OR_SELF: |
| 707 | fprintf(output, " 'descendant-or-self' "); break; |
| 708 | case AXIS_FOLLOWING: |
| 709 | fprintf(output, " 'following' "); break; |
| 710 | case AXIS_FOLLOWING_SIBLING: |
| 711 | fprintf(output, " 'following-siblings' "); break; |
| 712 | case AXIS_NAMESPACE: |
| 713 | fprintf(output, " 'namespace' "); break; |
| 714 | case AXIS_PARENT: |
| 715 | fprintf(output, " 'parent' "); break; |
| 716 | case AXIS_PRECEDING: |
| 717 | fprintf(output, " 'preceding' "); break; |
| 718 | case AXIS_PRECEDING_SIBLING: |
| 719 | fprintf(output, " 'preceding-sibling' "); break; |
| 720 | case AXIS_SELF: |
| 721 | fprintf(output, " 'self' "); break; |
| 722 | } |
| 723 | switch (test) { |
| 724 | case NODE_TEST_NONE: |
| 725 | fprintf(output, "'none' "); break; |
| 726 | case NODE_TEST_TYPE: |
| 727 | fprintf(output, "'type' "); break; |
| 728 | case NODE_TEST_PI: |
| 729 | fprintf(output, "'PI' "); break; |
| 730 | case NODE_TEST_ALL: |
| 731 | fprintf(output, "'all' "); break; |
| 732 | case NODE_TEST_NS: |
| 733 | fprintf(output, "'namespace' "); break; |
| 734 | case NODE_TEST_NAME: |
| 735 | fprintf(output, "'name' "); break; |
| 736 | } |
| 737 | switch (type) { |
| 738 | case NODE_TYPE_NODE: |
| 739 | fprintf(output, "'node' "); break; |
| 740 | case NODE_TYPE_COMMENT: |
| 741 | fprintf(output, "'comment' "); break; |
| 742 | case NODE_TYPE_TEXT: |
| 743 | fprintf(output, "'text' "); break; |
| 744 | case NODE_TYPE_PI: |
| 745 | fprintf(output, "'PI' "); break; |
| 746 | } |
| 747 | if (prefix != NULL) |
| 748 | fprintf(output, "%s:", prefix); |
| 749 | if (name != NULL) |
| 750 | fprintf(output, "%s", name); |
| 751 | break; |
| 752 | |
| 753 | } |
| 754 | case XPATH_OP_VALUE: { |
| 755 | xmlXPathObjectPtr object = (xmlXPathObjectPtr) op->value4; |
| 756 | |
| 757 | fprintf(output, "ELEM "); |
| 758 | xmlXPathDebugDumpObject(output, object, 0); |
| 759 | goto finish; |
| 760 | } |
| 761 | case XPATH_OP_VARIABLE: { |
| 762 | const xmlChar *prefix = op->value5; |
| 763 | const xmlChar *name = op->value4; |
| 764 | |
| 765 | if (prefix != NULL) |
| 766 | fprintf(output, "VARIABLE %s:%s", prefix, name); |
| 767 | else |
| 768 | fprintf(output, "VARIABLE %s", name); |
| 769 | break; |
| 770 | } |
| 771 | case XPATH_OP_FUNCTION: { |
| 772 | int nbargs = op->value; |
| 773 | const xmlChar *prefix = op->value5; |
| 774 | const xmlChar *name = op->value4; |
| 775 | |
| 776 | if (prefix != NULL) |
| 777 | fprintf(output, "FUNCTION %s:%s(%d args)", |
| 778 | prefix, name, nbargs); |
| 779 | else |
| 780 | fprintf(output, "FUNCTION %s(%d args)", name, nbargs); |
| 781 | break; |
| 782 | } |
| 783 | case XPATH_OP_ARG: fprintf(output, "ARG"); break; |
| 784 | case XPATH_OP_PREDICATE: fprintf(output, "PREDICATE"); break; |
| 785 | default: |
| 786 | fprintf(output, "UNKNOWN %d\n", op->op); return; |
| 787 | } |
| 788 | fprintf(output, "\n"); |
| 789 | finish: |
| 790 | if (op->ch1 >= 0) |
| 791 | xmlXPathDebugDumpStepOp(output, comp, &comp->steps[op->ch1], depth + 1); |
| 792 | if (op->ch2 >= 0) |
| 793 | xmlXPathDebugDumpStepOp(output, comp, &comp->steps[op->ch2], depth + 1); |
| 794 | } |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 795 | |
| 796 | void |
| 797 | xmlXPathDebugDumpCompExpr(FILE *output, xmlXPathCompExprPtr comp, |
| 798 | int depth) { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 799 | int i; |
| 800 | char shift[100]; |
| 801 | |
| 802 | for (i = 0;((i < depth) && (i < 25));i++) |
| 803 | shift[2 * i] = shift[2 * i + 1] = ' '; |
| 804 | shift[2 * i] = shift[2 * i + 1] = 0; |
| 805 | |
| 806 | fprintf(output, shift); |
| 807 | |
| 808 | if (comp == NULL) { |
| 809 | fprintf(output, "Compiled Expression is NULL\n"); |
| 810 | return; |
| 811 | } |
| 812 | fprintf(output, "Compiled Expression : %d elements\n", |
| 813 | comp->nbStep); |
| 814 | i = comp->last; |
| 815 | xmlXPathDebugDumpStepOp(output, comp, &comp->steps[i], depth + 1); |
| 816 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 817 | #endif |
| 818 | |
| 819 | /************************************************************************ |
| 820 | * * |
| 821 | * Parser stacks related functions and macros * |
| 822 | * * |
| 823 | ************************************************************************/ |
| 824 | |
| 825 | /* |
| 826 | * Generic function for accessing stacks in the Parser Context |
| 827 | */ |
| 828 | |
| 829 | #define PUSH_AND_POP(type, name) \ |
| 830 | extern int name##Push(xmlXPathParserContextPtr ctxt, type value) { \ |
| 831 | if (ctxt->name##Nr >= ctxt->name##Max) { \ |
| 832 | ctxt->name##Max *= 2; \ |
| 833 | ctxt->name##Tab = (type *) xmlRealloc(ctxt->name##Tab, \ |
| 834 | ctxt->name##Max * sizeof(ctxt->name##Tab[0])); \ |
| 835 | if (ctxt->name##Tab == NULL) { \ |
| 836 | xmlGenericError(xmlGenericErrorContext, \ |
| 837 | "realloc failed !\n"); \ |
| 838 | return(0); \ |
| 839 | } \ |
| 840 | } \ |
| 841 | ctxt->name##Tab[ctxt->name##Nr] = value; \ |
| 842 | ctxt->name = value; \ |
| 843 | return(ctxt->name##Nr++); \ |
| 844 | } \ |
| 845 | extern type name##Pop(xmlXPathParserContextPtr ctxt) { \ |
| 846 | type ret; \ |
| 847 | if (ctxt->name##Nr <= 0) return(0); \ |
| 848 | ctxt->name##Nr--; \ |
| 849 | if (ctxt->name##Nr > 0) \ |
| 850 | ctxt->name = ctxt->name##Tab[ctxt->name##Nr - 1]; \ |
| 851 | else \ |
| 852 | ctxt->name = NULL; \ |
| 853 | ret = ctxt->name##Tab[ctxt->name##Nr]; \ |
| 854 | ctxt->name##Tab[ctxt->name##Nr] = 0; \ |
| 855 | return(ret); \ |
| 856 | } \ |
| 857 | |
| 858 | PUSH_AND_POP(xmlXPathObjectPtr, value) |
| 859 | |
| 860 | /* |
| 861 | * Macros for accessing the content. Those should be used only by the parser, |
| 862 | * and not exported. |
| 863 | * |
| 864 | * Dirty macros, i.e. one need to make assumption on the context to use them |
| 865 | * |
| 866 | * CUR_PTR return the current pointer to the xmlChar to be parsed. |
| 867 | * CUR returns the current xmlChar value, i.e. a 8 bit value |
| 868 | * in ISO-Latin or UTF-8. |
| 869 | * This should be used internally by the parser |
| 870 | * only to compare to ASCII values otherwise it would break when |
| 871 | * running with UTF-8 encoding. |
| 872 | * NXT(n) returns the n'th next xmlChar. Same as CUR is should be used only |
| 873 | * to compare on ASCII based substring. |
| 874 | * SKIP(n) Skip n xmlChar, and must also be used only to skip ASCII defined |
| 875 | * strings within the parser. |
| 876 | * CURRENT Returns the current char value, with the full decoding of |
| 877 | * UTF-8 if we are using this mode. It returns an int. |
| 878 | * NEXT Skip to the next character, this does the proper decoding |
| 879 | * in UTF-8 mode. It also pop-up unfinished entities on the fly. |
| 880 | * It returns the pointer to the current xmlChar. |
| 881 | */ |
| 882 | |
| 883 | #define CUR (*ctxt->cur) |
| 884 | #define SKIP(val) ctxt->cur += (val) |
| 885 | #define NXT(val) ctxt->cur[(val)] |
| 886 | #define CUR_PTR ctxt->cur |
| 887 | |
| 888 | #define SKIP_BLANKS \ |
| 889 | while (IS_BLANK(*(ctxt->cur))) NEXT |
| 890 | |
| 891 | #define CURRENT (*ctxt->cur) |
| 892 | #define NEXT ((*ctxt->cur) ? ctxt->cur++: ctxt->cur) |
| 893 | |
Bjorn Reese | e1dc011 | 2001-03-03 12:09:03 +0000 | [diff] [blame] | 894 | |
| 895 | #ifndef DBL_DIG |
| 896 | #define DBL_DIG 16 |
| 897 | #endif |
| 898 | #ifndef DBL_EPSILON |
| 899 | #define DBL_EPSILON 1E-9 |
| 900 | #endif |
| 901 | |
| 902 | #define UPPER_DOUBLE 1E9 |
| 903 | #define LOWER_DOUBLE 1E-5 |
| 904 | |
| 905 | #define INTEGER_DIGITS DBL_DIG |
| 906 | #define FRACTION_DIGITS (DBL_DIG + 1) |
| 907 | #define EXPONENT_DIGITS (3 + 2) |
| 908 | |
| 909 | /** |
| 910 | * xmlXPathFormatNumber: |
| 911 | * @number: number to format |
| 912 | * @buffer: output buffer |
| 913 | * @buffersize: size of output buffer |
| 914 | * |
| 915 | * Convert the number into a string representation. |
| 916 | */ |
| 917 | static void |
| 918 | xmlXPathFormatNumber(double number, char buffer[], int buffersize) |
| 919 | { |
| 920 | switch (isinf(number)) { |
| 921 | case 1: |
| 922 | if (buffersize > (int)sizeof("+Infinity")) |
| 923 | sprintf(buffer, "+Infinity"); |
| 924 | break; |
| 925 | case -1: |
| 926 | if (buffersize > (int)sizeof("-Infinity")) |
| 927 | sprintf(buffer, "-Infinity"); |
| 928 | break; |
| 929 | default: |
| 930 | if (isnan(number)) { |
| 931 | if (buffersize > (int)sizeof("NaN")) |
| 932 | sprintf(buffer, "NaN"); |
| 933 | } else { |
| 934 | char work[INTEGER_DIGITS + FRACTION_DIGITS + EXPONENT_DIGITS + 1]; |
| 935 | char *pointer; |
| 936 | char *start; |
| 937 | int i; |
| 938 | int digits; |
| 939 | int is_negative; |
| 940 | int use_scientific; |
| 941 | int exponent; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 942 | int indx; |
Bjorn Reese | e1dc011 | 2001-03-03 12:09:03 +0000 | [diff] [blame] | 943 | int count; |
| 944 | double n; |
| 945 | |
| 946 | i = digits = 0; |
| 947 | is_negative = (number < 0.0); |
| 948 | if (is_negative) |
| 949 | number = -number; |
| 950 | |
| 951 | /* Scale number */ |
| 952 | n = log10(number); |
| 953 | exponent = (isinf(n) == -1) ? 0 : (int)n; |
| 954 | use_scientific = (((number <= LOWER_DOUBLE) || |
| 955 | (number > UPPER_DOUBLE)) && |
| 956 | (number != 0)); |
| 957 | if (use_scientific) { |
| 958 | number /= pow(10.0, (double)exponent); |
| 959 | while (number < 1.0) { |
| 960 | number *= 10.0; |
| 961 | exponent--; |
| 962 | } |
| 963 | } |
| 964 | |
| 965 | /* Integer part is build from back */ |
| 966 | pointer = &work[INTEGER_DIGITS + 1]; |
| 967 | if (number < 1.0) { |
| 968 | *(--pointer) = '0'; |
| 969 | digits++; |
| 970 | } else { |
| 971 | n = number; |
| 972 | for (i = 1; i < INTEGER_DIGITS - 1; i++) { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 973 | indx = (int)n % 10; |
| 974 | *(--pointer) = "0123456789"[indx]; |
Bjorn Reese | e1dc011 | 2001-03-03 12:09:03 +0000 | [diff] [blame] | 975 | n /= 10.0; |
| 976 | if (n < 1.0) |
| 977 | break; |
| 978 | } |
| 979 | digits += i; |
| 980 | } |
| 981 | if (is_negative) { |
| 982 | *(--pointer) = '-'; |
| 983 | digits++; |
| 984 | } |
| 985 | start = pointer; |
| 986 | |
| 987 | /* Fraction part is build from front */ |
| 988 | i = 0; |
| 989 | pointer = &work[INTEGER_DIGITS + 1]; |
| 990 | if (number - floor(number) > DBL_EPSILON) { |
| 991 | *(pointer++) = '.'; |
| 992 | i++; |
| 993 | n = number; |
| 994 | count = 0; |
| 995 | while (i < FRACTION_DIGITS) { |
| 996 | n -= floor(n); |
| 997 | n *= 10.0; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 998 | indx = (int)n % 10; |
| 999 | *(pointer++) = "0123456789"[indx]; |
Bjorn Reese | e1dc011 | 2001-03-03 12:09:03 +0000 | [diff] [blame] | 1000 | i++; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1001 | if ((indx != 0) || (count > 0)) |
Bjorn Reese | e1dc011 | 2001-03-03 12:09:03 +0000 | [diff] [blame] | 1002 | count++; |
| 1003 | if ((n > 10.0) || (count > FRACTION_DIGITS / 2)) |
| 1004 | break; |
| 1005 | } |
| 1006 | } |
| 1007 | /* Remove trailing zeroes */ |
| 1008 | while ((pointer[-1] == '0') && (i > 0)) { |
| 1009 | pointer--; |
| 1010 | i--; |
| 1011 | } |
| 1012 | digits += i; |
| 1013 | |
| 1014 | if (use_scientific) { |
| 1015 | *(pointer++) = 'e'; |
| 1016 | digits++; |
| 1017 | if (exponent < 0) { |
| 1018 | *(pointer++) = '-'; |
| 1019 | exponent = -exponent; |
| 1020 | } else { |
| 1021 | *(pointer++) = '+'; |
| 1022 | } |
| 1023 | digits++; |
| 1024 | if (exponent >= 100) |
| 1025 | pointer += 2; |
| 1026 | else if (exponent >= 10) |
| 1027 | pointer += 1; |
| 1028 | while (exponent >= 1) { |
| 1029 | *(pointer--) = "0123456789"[exponent % 10]; |
| 1030 | exponent /= 10; |
| 1031 | digits++; |
| 1032 | } |
| 1033 | } |
| 1034 | |
| 1035 | if (digits >= buffersize) |
| 1036 | digits = buffersize - 1; |
| 1037 | |
| 1038 | memcpy(buffer, start, digits); |
| 1039 | buffer[digits] = 0; |
| 1040 | } |
| 1041 | break; |
| 1042 | } |
| 1043 | } |
| 1044 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1045 | /************************************************************************ |
| 1046 | * * |
| 1047 | * Error handling routines * |
| 1048 | * * |
| 1049 | ************************************************************************/ |
| 1050 | |
| 1051 | |
| 1052 | const char *xmlXPathErrorMessages[] = { |
| 1053 | "Ok", |
| 1054 | "Number encoding", |
| 1055 | "Unfinished litteral", |
| 1056 | "Start of litteral", |
| 1057 | "Expected $ for variable reference", |
| 1058 | "Undefined variable", |
| 1059 | "Invalid predicate", |
| 1060 | "Invalid expression", |
| 1061 | "Missing closing curly brace", |
| 1062 | "Unregistered function", |
| 1063 | "Invalid operand", |
| 1064 | "Invalid type", |
| 1065 | "Invalid number of arguments", |
| 1066 | "Invalid context size", |
| 1067 | "Invalid context position", |
| 1068 | "Memory allocation error", |
| 1069 | "Syntax error", |
| 1070 | "Resource error", |
| 1071 | "Sub resource error", |
| 1072 | "Undefined namespace prefix" |
| 1073 | }; |
| 1074 | |
| 1075 | /** |
| 1076 | * xmlXPathError: |
| 1077 | * @ctxt: the XPath Parser context |
| 1078 | * @file: the file name |
| 1079 | * @line: the line number |
| 1080 | * @no: the error number |
| 1081 | * |
| 1082 | * Create a new xmlNodeSetPtr of type double and of value @val |
| 1083 | * |
| 1084 | * Returns the newly created object. |
| 1085 | */ |
| 1086 | void |
| 1087 | xmlXPatherror(xmlXPathParserContextPtr ctxt, const char *file, |
| 1088 | int line, int no) { |
| 1089 | int n; |
| 1090 | const xmlChar *cur; |
| 1091 | const xmlChar *base; |
| 1092 | |
| 1093 | xmlGenericError(xmlGenericErrorContext, |
| 1094 | "Error %s:%d: %s\n", file, line, |
| 1095 | xmlXPathErrorMessages[no]); |
| 1096 | |
| 1097 | cur = ctxt->cur; |
| 1098 | base = ctxt->base; |
| 1099 | while ((cur > base) && ((*cur == '\n') || (*cur == '\r'))) { |
| 1100 | cur--; |
| 1101 | } |
| 1102 | n = 0; |
| 1103 | while ((n++ < 80) && (cur > base) && (*cur != '\n') && (*cur != '\r')) |
| 1104 | cur--; |
| 1105 | if ((*cur == '\n') || (*cur == '\r')) cur++; |
| 1106 | base = cur; |
| 1107 | n = 0; |
| 1108 | while ((*cur != 0) && (*cur != '\n') && (*cur != '\r') && (n < 79)) { |
| 1109 | xmlGenericError(xmlGenericErrorContext, "%c", (unsigned char) *cur++); |
| 1110 | n++; |
| 1111 | } |
| 1112 | xmlGenericError(xmlGenericErrorContext, "\n"); |
| 1113 | cur = ctxt->cur; |
| 1114 | while ((*cur == '\n') || (*cur == '\r')) |
| 1115 | cur--; |
| 1116 | n = 0; |
| 1117 | while ((cur != base) && (n++ < 80)) { |
| 1118 | xmlGenericError(xmlGenericErrorContext, " "); |
| 1119 | base++; |
| 1120 | } |
| 1121 | xmlGenericError(xmlGenericErrorContext,"^\n"); |
| 1122 | } |
| 1123 | |
| 1124 | |
| 1125 | /************************************************************************ |
| 1126 | * * |
| 1127 | * Routines to handle NodeSets * |
| 1128 | * * |
| 1129 | ************************************************************************/ |
| 1130 | |
| 1131 | /** |
| 1132 | * xmlXPathCmpNodes: |
| 1133 | * @node1: the first node |
| 1134 | * @node2: the second node |
| 1135 | * |
| 1136 | * Compare two nodes w.r.t document order |
| 1137 | * |
| 1138 | * Returns -2 in case of error 1 if first point < second point, 0 if |
| 1139 | * that's the same node, -1 otherwise |
| 1140 | */ |
| 1141 | int |
| 1142 | xmlXPathCmpNodes(xmlNodePtr node1, xmlNodePtr node2) { |
| 1143 | int depth1, depth2; |
| 1144 | xmlNodePtr cur, root; |
| 1145 | |
| 1146 | if ((node1 == NULL) || (node2 == NULL)) |
| 1147 | return(-2); |
| 1148 | /* |
| 1149 | * a couple of optimizations which will avoid computations in most cases |
| 1150 | */ |
| 1151 | if (node1 == node2) |
| 1152 | return(0); |
| 1153 | if (node1 == node2->prev) |
| 1154 | return(1); |
| 1155 | if (node1 == node2->next) |
| 1156 | return(-1); |
| 1157 | |
| 1158 | /* |
| 1159 | * compute depth to root |
| 1160 | */ |
| 1161 | for (depth2 = 0, cur = node2;cur->parent != NULL;cur = cur->parent) { |
| 1162 | if (cur == node1) |
| 1163 | return(1); |
| 1164 | depth2++; |
| 1165 | } |
| 1166 | root = cur; |
| 1167 | for (depth1 = 0, cur = node1;cur->parent != NULL;cur = cur->parent) { |
| 1168 | if (cur == node2) |
| 1169 | return(-1); |
| 1170 | depth1++; |
| 1171 | } |
| 1172 | /* |
| 1173 | * Distinct document (or distinct entities :-( ) case. |
| 1174 | */ |
| 1175 | if (root != cur) { |
| 1176 | return(-2); |
| 1177 | } |
| 1178 | /* |
| 1179 | * get the nearest common ancestor. |
| 1180 | */ |
| 1181 | while (depth1 > depth2) { |
| 1182 | depth1--; |
| 1183 | node1 = node1->parent; |
| 1184 | } |
| 1185 | while (depth2 > depth1) { |
| 1186 | depth2--; |
| 1187 | node2 = node2->parent; |
| 1188 | } |
| 1189 | while (node1->parent != node2->parent) { |
| 1190 | node1 = node1->parent; |
| 1191 | node2 = node2->parent; |
| 1192 | /* should not happen but just in case ... */ |
| 1193 | if ((node1 == NULL) || (node2 == NULL)) |
| 1194 | return(-2); |
| 1195 | } |
| 1196 | /* |
| 1197 | * Find who's first. |
| 1198 | */ |
| 1199 | if (node1 == node2->next) |
| 1200 | return(-1); |
| 1201 | for (cur = node1->next;cur != NULL;cur = cur->next) |
| 1202 | if (cur == node2) |
| 1203 | return(1); |
| 1204 | return(-1); /* assume there is no sibling list corruption */ |
| 1205 | } |
| 1206 | |
| 1207 | /** |
| 1208 | * xmlXPathNodeSetSort: |
| 1209 | * @set: the node set |
| 1210 | * |
| 1211 | * Sort the node set in document order |
| 1212 | */ |
| 1213 | void |
| 1214 | xmlXPathNodeSetSort(xmlNodeSetPtr set) { |
Bjorn Reese | e1dc011 | 2001-03-03 12:09:03 +0000 | [diff] [blame] | 1215 | int i, j, incr, len; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1216 | xmlNodePtr tmp; |
| 1217 | |
| 1218 | if (set == NULL) |
| 1219 | return; |
| 1220 | |
| 1221 | /* Use Shell's sort to sort the node-set */ |
| 1222 | len = set->nodeNr; |
| 1223 | for (incr = len / 2; incr > 0; incr /= 2) { |
| 1224 | for (i = incr; i < len; i++) { |
| 1225 | j = i - incr; |
| 1226 | while (j >= 0) { |
Bjorn Reese | e1dc011 | 2001-03-03 12:09:03 +0000 | [diff] [blame] | 1227 | if (xmlXPathCmpNodes(set->nodeTab[j], |
| 1228 | set->nodeTab[j + incr]) == -1) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1229 | tmp = set->nodeTab[j]; |
| 1230 | set->nodeTab[j] = set->nodeTab[j + incr]; |
| 1231 | set->nodeTab[j + incr] = tmp; |
| 1232 | j -= incr; |
| 1233 | } else |
| 1234 | break; |
| 1235 | } |
| 1236 | } |
| 1237 | } |
| 1238 | } |
| 1239 | |
| 1240 | #define XML_NODESET_DEFAULT 10 |
| 1241 | /** |
| 1242 | * xmlXPathNodeSetCreate: |
| 1243 | * @val: an initial xmlNodePtr, or NULL |
| 1244 | * |
| 1245 | * Create a new xmlNodeSetPtr of type double and of value @val |
| 1246 | * |
| 1247 | * Returns the newly created object. |
| 1248 | */ |
| 1249 | xmlNodeSetPtr |
| 1250 | xmlXPathNodeSetCreate(xmlNodePtr val) { |
| 1251 | xmlNodeSetPtr ret; |
| 1252 | |
| 1253 | ret = (xmlNodeSetPtr) xmlMalloc(sizeof(xmlNodeSet)); |
| 1254 | if (ret == NULL) { |
| 1255 | xmlGenericError(xmlGenericErrorContext, |
| 1256 | "xmlXPathNewNodeSet: out of memory\n"); |
| 1257 | return(NULL); |
| 1258 | } |
| 1259 | memset(ret, 0 , (size_t) sizeof(xmlNodeSet)); |
| 1260 | if (val != NULL) { |
| 1261 | ret->nodeTab = (xmlNodePtr *) xmlMalloc(XML_NODESET_DEFAULT * |
| 1262 | sizeof(xmlNodePtr)); |
| 1263 | if (ret->nodeTab == NULL) { |
| 1264 | xmlGenericError(xmlGenericErrorContext, |
| 1265 | "xmlXPathNewNodeSet: out of memory\n"); |
| 1266 | return(NULL); |
| 1267 | } |
| 1268 | memset(ret->nodeTab, 0 , |
| 1269 | XML_NODESET_DEFAULT * (size_t) sizeof(xmlNodePtr)); |
| 1270 | ret->nodeMax = XML_NODESET_DEFAULT; |
| 1271 | ret->nodeTab[ret->nodeNr++] = val; |
| 1272 | } |
| 1273 | return(ret); |
| 1274 | } |
| 1275 | |
| 1276 | /** |
| 1277 | * xmlXPathNodeSetAdd: |
| 1278 | * @cur: the initial node set |
| 1279 | * @val: a new xmlNodePtr |
| 1280 | * |
| 1281 | * add a new xmlNodePtr ot an existing NodeSet |
| 1282 | */ |
| 1283 | void |
| 1284 | xmlXPathNodeSetAdd(xmlNodeSetPtr cur, xmlNodePtr val) { |
| 1285 | int i; |
| 1286 | |
| 1287 | if (val == NULL) return; |
| 1288 | |
| 1289 | /* |
| 1290 | * check against doublons |
| 1291 | */ |
| 1292 | for (i = 0;i < cur->nodeNr;i++) |
| 1293 | if (cur->nodeTab[i] == val) return; |
| 1294 | |
| 1295 | /* |
| 1296 | * grow the nodeTab if needed |
| 1297 | */ |
| 1298 | if (cur->nodeMax == 0) { |
| 1299 | cur->nodeTab = (xmlNodePtr *) xmlMalloc(XML_NODESET_DEFAULT * |
| 1300 | sizeof(xmlNodePtr)); |
| 1301 | if (cur->nodeTab == NULL) { |
| 1302 | xmlGenericError(xmlGenericErrorContext, |
| 1303 | "xmlXPathNodeSetAdd: out of memory\n"); |
| 1304 | return; |
| 1305 | } |
| 1306 | memset(cur->nodeTab, 0 , |
| 1307 | XML_NODESET_DEFAULT * (size_t) sizeof(xmlNodePtr)); |
| 1308 | cur->nodeMax = XML_NODESET_DEFAULT; |
| 1309 | } else if (cur->nodeNr == cur->nodeMax) { |
| 1310 | xmlNodePtr *temp; |
| 1311 | |
| 1312 | cur->nodeMax *= 2; |
| 1313 | temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax * |
| 1314 | sizeof(xmlNodePtr)); |
| 1315 | if (temp == NULL) { |
| 1316 | xmlGenericError(xmlGenericErrorContext, |
| 1317 | "xmlXPathNodeSetAdd: out of memory\n"); |
| 1318 | return; |
| 1319 | } |
| 1320 | cur->nodeTab = temp; |
| 1321 | } |
| 1322 | cur->nodeTab[cur->nodeNr++] = val; |
| 1323 | } |
| 1324 | |
| 1325 | /** |
| 1326 | * xmlXPathNodeSetAddUnique: |
| 1327 | * @cur: the initial node set |
| 1328 | * @val: a new xmlNodePtr |
| 1329 | * |
| 1330 | * add a new xmlNodePtr ot an existing NodeSet, optimized version |
| 1331 | * when we are sure the node is not already in the set. |
| 1332 | */ |
| 1333 | void |
| 1334 | xmlXPathNodeSetAddUnique(xmlNodeSetPtr cur, xmlNodePtr val) { |
| 1335 | if (val == NULL) return; |
| 1336 | |
| 1337 | /* |
| 1338 | * grow the nodeTab if needed |
| 1339 | */ |
| 1340 | if (cur->nodeMax == 0) { |
| 1341 | cur->nodeTab = (xmlNodePtr *) xmlMalloc(XML_NODESET_DEFAULT * |
| 1342 | sizeof(xmlNodePtr)); |
| 1343 | if (cur->nodeTab == NULL) { |
| 1344 | xmlGenericError(xmlGenericErrorContext, |
| 1345 | "xmlXPathNodeSetAddUnique: out of memory\n"); |
| 1346 | return; |
| 1347 | } |
| 1348 | memset(cur->nodeTab, 0 , |
| 1349 | XML_NODESET_DEFAULT * (size_t) sizeof(xmlNodePtr)); |
| 1350 | cur->nodeMax = XML_NODESET_DEFAULT; |
| 1351 | } else if (cur->nodeNr == cur->nodeMax) { |
| 1352 | xmlNodePtr *temp; |
| 1353 | |
| 1354 | cur->nodeMax *= 2; |
| 1355 | temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax * |
| 1356 | sizeof(xmlNodePtr)); |
| 1357 | if (temp == NULL) { |
| 1358 | xmlGenericError(xmlGenericErrorContext, |
| 1359 | "xmlXPathNodeSetAddUnique: out of memory\n"); |
| 1360 | return; |
| 1361 | } |
| 1362 | cur->nodeTab = temp; |
| 1363 | } |
| 1364 | cur->nodeTab[cur->nodeNr++] = val; |
| 1365 | } |
| 1366 | |
| 1367 | /** |
| 1368 | * xmlXPathNodeSetMerge: |
| 1369 | * @val1: the first NodeSet or NULL |
| 1370 | * @val2: the second NodeSet |
| 1371 | * |
| 1372 | * Merges two nodesets, all nodes from @val2 are added to @val1 |
| 1373 | * if @val1 is NULL, a new set is created and copied from @val2 |
| 1374 | * |
| 1375 | * Returns val1 once extended or NULL in case of error. |
| 1376 | */ |
| 1377 | xmlNodeSetPtr |
| 1378 | xmlXPathNodeSetMerge(xmlNodeSetPtr val1, xmlNodeSetPtr val2) { |
| 1379 | int i, j, initNr; |
| 1380 | |
| 1381 | if (val2 == NULL) return(val1); |
| 1382 | if (val1 == NULL) { |
| 1383 | val1 = xmlXPathNodeSetCreate(NULL); |
| 1384 | } |
| 1385 | |
| 1386 | initNr = val1->nodeNr; |
| 1387 | |
| 1388 | for (i = 0;i < val2->nodeNr;i++) { |
| 1389 | /* |
| 1390 | * check against doublons |
| 1391 | */ |
| 1392 | for (j = 0; j < initNr; j++) |
| 1393 | if (val1->nodeTab[j] == val2->nodeTab[i]) continue; |
| 1394 | |
| 1395 | /* |
| 1396 | * grow the nodeTab if needed |
| 1397 | */ |
| 1398 | if (val1->nodeMax == 0) { |
| 1399 | val1->nodeTab = (xmlNodePtr *) xmlMalloc(XML_NODESET_DEFAULT * |
| 1400 | sizeof(xmlNodePtr)); |
| 1401 | if (val1->nodeTab == NULL) { |
| 1402 | xmlGenericError(xmlGenericErrorContext, |
| 1403 | "xmlXPathNodeSetMerge: out of memory\n"); |
| 1404 | return(NULL); |
| 1405 | } |
| 1406 | memset(val1->nodeTab, 0 , |
| 1407 | XML_NODESET_DEFAULT * (size_t) sizeof(xmlNodePtr)); |
| 1408 | val1->nodeMax = XML_NODESET_DEFAULT; |
| 1409 | } else if (val1->nodeNr == val1->nodeMax) { |
| 1410 | xmlNodePtr *temp; |
| 1411 | |
| 1412 | val1->nodeMax *= 2; |
| 1413 | temp = (xmlNodePtr *) xmlRealloc(val1->nodeTab, val1->nodeMax * |
| 1414 | sizeof(xmlNodePtr)); |
| 1415 | if (temp == NULL) { |
| 1416 | xmlGenericError(xmlGenericErrorContext, |
| 1417 | "xmlXPathNodeSetMerge: out of memory\n"); |
| 1418 | return(NULL); |
| 1419 | } |
| 1420 | val1->nodeTab = temp; |
| 1421 | } |
| 1422 | val1->nodeTab[val1->nodeNr++] = val2->nodeTab[i]; |
| 1423 | } |
| 1424 | |
| 1425 | return(val1); |
| 1426 | } |
| 1427 | |
| 1428 | /** |
| 1429 | * xmlXPathNodeSetDel: |
| 1430 | * @cur: the initial node set |
| 1431 | * @val: an xmlNodePtr |
| 1432 | * |
| 1433 | * Removes an xmlNodePtr from an existing NodeSet |
| 1434 | */ |
| 1435 | void |
| 1436 | xmlXPathNodeSetDel(xmlNodeSetPtr cur, xmlNodePtr val) { |
| 1437 | int i; |
| 1438 | |
| 1439 | if (cur == NULL) return; |
| 1440 | if (val == NULL) return; |
| 1441 | |
| 1442 | /* |
| 1443 | * check against doublons |
| 1444 | */ |
| 1445 | for (i = 0;i < cur->nodeNr;i++) |
| 1446 | if (cur->nodeTab[i] == val) break; |
| 1447 | |
| 1448 | if (i >= cur->nodeNr) { |
| 1449 | #ifdef DEBUG |
| 1450 | xmlGenericError(xmlGenericErrorContext, |
| 1451 | "xmlXPathNodeSetDel: Node %s wasn't found in NodeList\n", |
| 1452 | val->name); |
| 1453 | #endif |
| 1454 | return; |
| 1455 | } |
| 1456 | cur->nodeNr--; |
| 1457 | for (;i < cur->nodeNr;i++) |
| 1458 | cur->nodeTab[i] = cur->nodeTab[i + 1]; |
| 1459 | cur->nodeTab[cur->nodeNr] = NULL; |
| 1460 | } |
| 1461 | |
| 1462 | /** |
| 1463 | * xmlXPathNodeSetRemove: |
| 1464 | * @cur: the initial node set |
| 1465 | * @val: the index to remove |
| 1466 | * |
| 1467 | * Removes an entry from an existing NodeSet list. |
| 1468 | */ |
| 1469 | void |
| 1470 | xmlXPathNodeSetRemove(xmlNodeSetPtr cur, int val) { |
| 1471 | if (cur == NULL) return; |
| 1472 | if (val >= cur->nodeNr) return; |
| 1473 | cur->nodeNr--; |
| 1474 | for (;val < cur->nodeNr;val++) |
| 1475 | cur->nodeTab[val] = cur->nodeTab[val + 1]; |
| 1476 | cur->nodeTab[cur->nodeNr] = NULL; |
| 1477 | } |
| 1478 | |
| 1479 | /** |
| 1480 | * xmlXPathFreeNodeSet: |
| 1481 | * @obj: the xmlNodeSetPtr to free |
| 1482 | * |
| 1483 | * Free the NodeSet compound (not the actual nodes !). |
| 1484 | */ |
| 1485 | void |
| 1486 | xmlXPathFreeNodeSet(xmlNodeSetPtr obj) { |
| 1487 | if (obj == NULL) return; |
| 1488 | if (obj->nodeTab != NULL) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1489 | xmlFree(obj->nodeTab); |
| 1490 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1491 | xmlFree(obj); |
| 1492 | } |
| 1493 | |
| 1494 | /** |
| 1495 | * xmlXPathFreeValueTree: |
| 1496 | * @obj: the xmlNodeSetPtr to free |
| 1497 | * |
| 1498 | * Free the NodeSet compound and the actual tree, this is different |
| 1499 | * from xmlXPathFreeNodeSet() |
| 1500 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 1501 | static void |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1502 | xmlXPathFreeValueTree(xmlNodeSetPtr obj) { |
| 1503 | int i; |
| 1504 | |
| 1505 | if (obj == NULL) return; |
| 1506 | for (i = 0;i < obj->nodeNr;i++) |
| 1507 | if (obj->nodeTab[i] != NULL) |
Daniel Veillard | bbd51d5 | 2001-02-24 03:07:03 +0000 | [diff] [blame] | 1508 | xmlFreeNodeList(obj->nodeTab[i]); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1509 | |
| 1510 | if (obj->nodeTab != NULL) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1511 | xmlFree(obj->nodeTab); |
| 1512 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1513 | xmlFree(obj); |
| 1514 | } |
| 1515 | |
| 1516 | #if defined(DEBUG) || defined(DEBUG_STEP) |
| 1517 | /** |
| 1518 | * xmlGenericErrorContextNodeSet: |
| 1519 | * @output: a FILE * for the output |
| 1520 | * @obj: the xmlNodeSetPtr to free |
| 1521 | * |
| 1522 | * Quick display of a NodeSet |
| 1523 | */ |
| 1524 | void |
| 1525 | xmlGenericErrorContextNodeSet(FILE *output, xmlNodeSetPtr obj) { |
| 1526 | int i; |
| 1527 | |
| 1528 | if (output == NULL) output = xmlGenericErrorContext; |
| 1529 | if (obj == NULL) { |
| 1530 | fprintf(output, "NodeSet == NULL !\n"); |
| 1531 | return; |
| 1532 | } |
| 1533 | if (obj->nodeNr == 0) { |
| 1534 | fprintf(output, "NodeSet is empty\n"); |
| 1535 | return; |
| 1536 | } |
| 1537 | if (obj->nodeTab == NULL) { |
| 1538 | fprintf(output, " nodeTab == NULL !\n"); |
| 1539 | return; |
| 1540 | } |
| 1541 | for (i = 0; i < obj->nodeNr; i++) { |
| 1542 | if (obj->nodeTab[i] == NULL) { |
| 1543 | fprintf(output, " NULL !\n"); |
| 1544 | return; |
| 1545 | } |
| 1546 | if ((obj->nodeTab[i]->type == XML_DOCUMENT_NODE) || |
| 1547 | (obj->nodeTab[i]->type == XML_HTML_DOCUMENT_NODE)) |
| 1548 | fprintf(output, " /"); |
| 1549 | else if (obj->nodeTab[i]->name == NULL) |
| 1550 | fprintf(output, " noname!"); |
| 1551 | else fprintf(output, " %s", obj->nodeTab[i]->name); |
| 1552 | } |
| 1553 | fprintf(output, "\n"); |
| 1554 | } |
| 1555 | #endif |
| 1556 | |
| 1557 | /** |
| 1558 | * xmlXPathNewNodeSet: |
| 1559 | * @val: the NodePtr value |
| 1560 | * |
| 1561 | * Create a new xmlXPathObjectPtr of type NodeSet and initialize |
| 1562 | * it with the single Node @val |
| 1563 | * |
| 1564 | * Returns the newly created object. |
| 1565 | */ |
| 1566 | xmlXPathObjectPtr |
| 1567 | xmlXPathNewNodeSet(xmlNodePtr val) { |
| 1568 | xmlXPathObjectPtr ret; |
| 1569 | |
| 1570 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 1571 | if (ret == NULL) { |
| 1572 | xmlGenericError(xmlGenericErrorContext, |
| 1573 | "xmlXPathNewNodeSet: out of memory\n"); |
| 1574 | return(NULL); |
| 1575 | } |
| 1576 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 1577 | ret->type = XPATH_NODESET; |
Daniel Veillard | 7785171 | 2001-02-27 21:54:07 +0000 | [diff] [blame] | 1578 | ret->boolval = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1579 | ret->nodesetval = xmlXPathNodeSetCreate(val); |
| 1580 | return(ret); |
| 1581 | } |
| 1582 | |
| 1583 | /** |
| 1584 | * xmlXPathNewValueTree: |
| 1585 | * @val: the NodePtr value |
| 1586 | * |
| 1587 | * Create a new xmlXPathObjectPtr of type Value Tree (XSLT) and initialize |
| 1588 | * it with the tree root @val |
| 1589 | * |
| 1590 | * Returns the newly created object. |
| 1591 | */ |
| 1592 | xmlXPathObjectPtr |
| 1593 | xmlXPathNewValueTree(xmlNodePtr val) { |
| 1594 | xmlXPathObjectPtr ret; |
| 1595 | |
| 1596 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 1597 | if (ret == NULL) { |
| 1598 | xmlGenericError(xmlGenericErrorContext, |
| 1599 | "xmlXPathNewNodeSet: out of memory\n"); |
| 1600 | return(NULL); |
| 1601 | } |
| 1602 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 1603 | ret->type = XPATH_XSLT_TREE; |
| 1604 | ret->nodesetval = xmlXPathNodeSetCreate(val); |
| 1605 | return(ret); |
| 1606 | } |
| 1607 | |
| 1608 | /** |
| 1609 | * xmlXPathNewNodeSetList: |
| 1610 | * @val: an existing NodeSet |
| 1611 | * |
| 1612 | * Create a new xmlXPathObjectPtr of type NodeSet and initialize |
| 1613 | * it with the Nodeset @val |
| 1614 | * |
| 1615 | * Returns the newly created object. |
| 1616 | */ |
| 1617 | xmlXPathObjectPtr |
| 1618 | xmlXPathNewNodeSetList(xmlNodeSetPtr val) { |
| 1619 | xmlXPathObjectPtr ret; |
| 1620 | int i; |
| 1621 | |
| 1622 | if (val == NULL) |
| 1623 | ret = NULL; |
| 1624 | else if (val->nodeTab == NULL) |
| 1625 | ret = xmlXPathNewNodeSet(NULL); |
| 1626 | else |
| 1627 | { |
| 1628 | ret = xmlXPathNewNodeSet(val->nodeTab[0]); |
| 1629 | for (i = 1; i < val->nodeNr; ++i) |
| 1630 | xmlXPathNodeSetAddUnique(ret->nodesetval, val->nodeTab[i]); |
| 1631 | } |
| 1632 | |
| 1633 | return(ret); |
| 1634 | } |
| 1635 | |
| 1636 | /** |
| 1637 | * xmlXPathWrapNodeSet: |
| 1638 | * @val: the NodePtr value |
| 1639 | * |
| 1640 | * Wrap the Nodeset @val in a new xmlXPathObjectPtr |
| 1641 | * |
| 1642 | * Returns the newly created object. |
| 1643 | */ |
| 1644 | xmlXPathObjectPtr |
| 1645 | xmlXPathWrapNodeSet(xmlNodeSetPtr val) { |
| 1646 | xmlXPathObjectPtr ret; |
| 1647 | |
| 1648 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 1649 | if (ret == NULL) { |
| 1650 | xmlGenericError(xmlGenericErrorContext, |
| 1651 | "xmlXPathWrapNodeSet: out of memory\n"); |
| 1652 | return(NULL); |
| 1653 | } |
| 1654 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 1655 | ret->type = XPATH_NODESET; |
| 1656 | ret->nodesetval = val; |
| 1657 | return(ret); |
| 1658 | } |
| 1659 | |
| 1660 | /** |
| 1661 | * xmlXPathFreeNodeSetList: |
| 1662 | * @obj: an existing NodeSetList object |
| 1663 | * |
| 1664 | * Free up the xmlXPathObjectPtr @obj but don't deallocate the objects in |
| 1665 | * the list contrary to xmlXPathFreeObject(). |
| 1666 | */ |
| 1667 | void |
| 1668 | xmlXPathFreeNodeSetList(xmlXPathObjectPtr obj) { |
| 1669 | if (obj == NULL) return; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1670 | xmlFree(obj); |
| 1671 | } |
| 1672 | |
| 1673 | /************************************************************************ |
| 1674 | * * |
| 1675 | * Routines to handle extra functions * |
| 1676 | * * |
| 1677 | ************************************************************************/ |
| 1678 | |
| 1679 | /** |
| 1680 | * xmlXPathRegisterFunc: |
| 1681 | * @ctxt: the XPath context |
| 1682 | * @name: the function name |
| 1683 | * @f: the function implementation or NULL |
| 1684 | * |
| 1685 | * Register a new function. If @f is NULL it unregisters the function |
| 1686 | * |
| 1687 | * Returns 0 in case of success, -1 in case of error |
| 1688 | */ |
| 1689 | int |
| 1690 | xmlXPathRegisterFunc(xmlXPathContextPtr ctxt, const xmlChar *name, |
| 1691 | xmlXPathFunction f) { |
| 1692 | return(xmlXPathRegisterFuncNS(ctxt, name, NULL, f)); |
| 1693 | } |
| 1694 | |
| 1695 | /** |
| 1696 | * xmlXPathRegisterFuncNS: |
| 1697 | * @ctxt: the XPath context |
| 1698 | * @name: the function name |
| 1699 | * @ns_uri: the function namespace URI |
| 1700 | * @f: the function implementation or NULL |
| 1701 | * |
| 1702 | * Register a new function. If @f is NULL it unregisters the function |
| 1703 | * |
| 1704 | * Returns 0 in case of success, -1 in case of error |
| 1705 | */ |
| 1706 | int |
| 1707 | xmlXPathRegisterFuncNS(xmlXPathContextPtr ctxt, const xmlChar *name, |
| 1708 | const xmlChar *ns_uri, xmlXPathFunction f) { |
| 1709 | if (ctxt == NULL) |
| 1710 | return(-1); |
| 1711 | if (name == NULL) |
| 1712 | return(-1); |
| 1713 | |
| 1714 | if (ctxt->funcHash == NULL) |
| 1715 | ctxt->funcHash = xmlHashCreate(0); |
| 1716 | if (ctxt->funcHash == NULL) |
| 1717 | return(-1); |
| 1718 | return(xmlHashAddEntry2(ctxt->funcHash, name, ns_uri, (void *) f)); |
| 1719 | } |
| 1720 | |
| 1721 | /** |
| 1722 | * xmlXPathFunctionLookup: |
| 1723 | * @ctxt: the XPath context |
| 1724 | * @name: the function name |
| 1725 | * |
| 1726 | * Search in the Function array of the context for the given |
| 1727 | * function. |
| 1728 | * |
| 1729 | * Returns the xmlXPathFunction or NULL if not found |
| 1730 | */ |
| 1731 | xmlXPathFunction |
| 1732 | xmlXPathFunctionLookup(xmlXPathContextPtr ctxt, const xmlChar *name) { |
| 1733 | return(xmlXPathFunctionLookupNS(ctxt, name, NULL)); |
| 1734 | } |
| 1735 | |
| 1736 | /** |
| 1737 | * xmlXPathFunctionLookupNS: |
| 1738 | * @ctxt: the XPath context |
| 1739 | * @name: the function name |
| 1740 | * @ns_uri: the function namespace URI |
| 1741 | * |
| 1742 | * Search in the Function array of the context for the given |
| 1743 | * function. |
| 1744 | * |
| 1745 | * Returns the xmlXPathFunction or NULL if not found |
| 1746 | */ |
| 1747 | xmlXPathFunction |
| 1748 | xmlXPathFunctionLookupNS(xmlXPathContextPtr ctxt, const xmlChar *name, |
| 1749 | const xmlChar *ns_uri) { |
| 1750 | if (ctxt == NULL) |
| 1751 | return(NULL); |
| 1752 | if (ctxt->funcHash == NULL) |
| 1753 | return(NULL); |
| 1754 | if (name == NULL) |
| 1755 | return(NULL); |
| 1756 | |
| 1757 | return((xmlXPathFunction) xmlHashLookup2(ctxt->funcHash, name, ns_uri)); |
| 1758 | } |
| 1759 | |
| 1760 | /** |
| 1761 | * xmlXPathRegisteredFuncsCleanup: |
| 1762 | * @ctxt: the XPath context |
| 1763 | * |
| 1764 | * Cleanup the XPath context data associated to registered functions |
| 1765 | */ |
| 1766 | void |
| 1767 | xmlXPathRegisteredFuncsCleanup(xmlXPathContextPtr ctxt) { |
| 1768 | if (ctxt == NULL) |
| 1769 | return; |
| 1770 | |
| 1771 | xmlHashFree(ctxt->funcHash, NULL); |
| 1772 | ctxt->funcHash = NULL; |
| 1773 | } |
| 1774 | |
| 1775 | /************************************************************************ |
| 1776 | * * |
| 1777 | * Routines to handle Variable * |
| 1778 | * * |
| 1779 | ************************************************************************/ |
| 1780 | |
| 1781 | /** |
| 1782 | * xmlXPathRegisterVariable: |
| 1783 | * @ctxt: the XPath context |
| 1784 | * @name: the variable name |
| 1785 | * @value: the variable value or NULL |
| 1786 | * |
| 1787 | * Register a new variable value. If @value is NULL it unregisters |
| 1788 | * the variable |
| 1789 | * |
| 1790 | * Returns 0 in case of success, -1 in case of error |
| 1791 | */ |
| 1792 | int |
| 1793 | xmlXPathRegisterVariable(xmlXPathContextPtr ctxt, const xmlChar *name, |
| 1794 | xmlXPathObjectPtr value) { |
| 1795 | return(xmlXPathRegisterVariableNS(ctxt, name, NULL, value)); |
| 1796 | } |
| 1797 | |
| 1798 | /** |
| 1799 | * xmlXPathRegisterVariableNS: |
| 1800 | * @ctxt: the XPath context |
| 1801 | * @name: the variable name |
| 1802 | * @ns_uri: the variable namespace URI |
| 1803 | * @value: the variable value or NULL |
| 1804 | * |
| 1805 | * Register a new variable value. If @value is NULL it unregisters |
| 1806 | * the variable |
| 1807 | * |
| 1808 | * Returns 0 in case of success, -1 in case of error |
| 1809 | */ |
| 1810 | int |
| 1811 | xmlXPathRegisterVariableNS(xmlXPathContextPtr ctxt, const xmlChar *name, |
| 1812 | const xmlChar *ns_uri, |
| 1813 | xmlXPathObjectPtr value) { |
| 1814 | if (ctxt == NULL) |
| 1815 | return(-1); |
| 1816 | if (name == NULL) |
| 1817 | return(-1); |
| 1818 | |
| 1819 | if (ctxt->varHash == NULL) |
| 1820 | ctxt->varHash = xmlHashCreate(0); |
| 1821 | if (ctxt->varHash == NULL) |
| 1822 | return(-1); |
| 1823 | return(xmlHashUpdateEntry2(ctxt->varHash, name, ns_uri, |
| 1824 | (void *) value, |
| 1825 | (xmlHashDeallocator)xmlXPathFreeObject)); |
| 1826 | } |
| 1827 | |
| 1828 | /** |
| 1829 | * xmlXPathRegisterVariableLookup: |
| 1830 | * @ctxt: the XPath context |
| 1831 | * @f: the lookup function |
| 1832 | * @data: the lookup data |
| 1833 | * |
| 1834 | * register an external mechanism to do variable lookup |
| 1835 | */ |
| 1836 | void |
| 1837 | xmlXPathRegisterVariableLookup(xmlXPathContextPtr ctxt, |
| 1838 | xmlXPathVariableLookupFunc f, void *data) { |
| 1839 | if (ctxt == NULL) |
| 1840 | return; |
| 1841 | ctxt->varLookupFunc = (void *) f; |
| 1842 | ctxt->varLookupData = data; |
| 1843 | } |
| 1844 | |
| 1845 | /** |
| 1846 | * xmlXPathVariableLookup: |
| 1847 | * @ctxt: the XPath context |
| 1848 | * @name: the variable name |
| 1849 | * |
| 1850 | * Search in the Variable array of the context for the given |
| 1851 | * variable value. |
| 1852 | * |
| 1853 | * Returns the value or NULL if not found |
| 1854 | */ |
| 1855 | xmlXPathObjectPtr |
| 1856 | xmlXPathVariableLookup(xmlXPathContextPtr ctxt, const xmlChar *name) { |
| 1857 | if (ctxt == NULL) |
| 1858 | return(NULL); |
| 1859 | |
| 1860 | if (ctxt->varLookupFunc != NULL) { |
| 1861 | xmlXPathObjectPtr ret; |
| 1862 | |
| 1863 | ret = ((xmlXPathVariableLookupFunc)ctxt->varLookupFunc) |
| 1864 | (ctxt->varLookupData, name, NULL); |
| 1865 | if (ret != NULL) return(ret); |
| 1866 | } |
| 1867 | return(xmlXPathVariableLookupNS(ctxt, name, NULL)); |
| 1868 | } |
| 1869 | |
| 1870 | /** |
| 1871 | * xmlXPathVariableLookupNS: |
| 1872 | * @ctxt: the XPath context |
| 1873 | * @name: the variable name |
| 1874 | * @ns_uri: the variable namespace URI |
| 1875 | * |
| 1876 | * Search in the Variable array of the context for the given |
| 1877 | * variable value. |
| 1878 | * |
| 1879 | * Returns the value or NULL if not found |
| 1880 | */ |
| 1881 | xmlXPathObjectPtr |
| 1882 | xmlXPathVariableLookupNS(xmlXPathContextPtr ctxt, const xmlChar *name, |
| 1883 | const xmlChar *ns_uri) { |
| 1884 | if (ctxt == NULL) |
| 1885 | return(NULL); |
| 1886 | |
| 1887 | if (ctxt->varLookupFunc != NULL) { |
| 1888 | xmlXPathObjectPtr ret; |
| 1889 | |
| 1890 | ret = ((xmlXPathVariableLookupFunc)ctxt->varLookupFunc) |
| 1891 | (ctxt->varLookupData, name, ns_uri); |
| 1892 | if (ret != NULL) return(ret); |
| 1893 | } |
| 1894 | |
| 1895 | if (ctxt->varHash == NULL) |
| 1896 | return(NULL); |
| 1897 | if (name == NULL) |
| 1898 | return(NULL); |
| 1899 | |
| 1900 | return((xmlXPathObjectPtr) xmlHashLookup2(ctxt->varHash, name, ns_uri)); |
| 1901 | } |
| 1902 | |
| 1903 | /** |
| 1904 | * xmlXPathRegisteredVariablesCleanup: |
| 1905 | * @ctxt: the XPath context |
| 1906 | * |
| 1907 | * Cleanup the XPath context data associated to registered variables |
| 1908 | */ |
| 1909 | void |
| 1910 | xmlXPathRegisteredVariablesCleanup(xmlXPathContextPtr ctxt) { |
| 1911 | if (ctxt == NULL) |
| 1912 | return; |
| 1913 | |
| 1914 | xmlHashFree(ctxt->varHash, NULL); |
| 1915 | ctxt->varHash = NULL; |
| 1916 | } |
| 1917 | |
| 1918 | /** |
| 1919 | * xmlXPathRegisterNs: |
| 1920 | * @ctxt: the XPath context |
| 1921 | * @prefix: the namespace prefix |
| 1922 | * @ns_uri: the namespace name |
| 1923 | * |
| 1924 | * Register a new namespace. If @ns_uri is NULL it unregisters |
| 1925 | * the namespace |
| 1926 | * |
| 1927 | * Returns 0 in case of success, -1 in case of error |
| 1928 | */ |
| 1929 | int |
| 1930 | xmlXPathRegisterNs(xmlXPathContextPtr ctxt, const xmlChar *prefix, |
| 1931 | const xmlChar *ns_uri) { |
| 1932 | if (ctxt == NULL) |
| 1933 | return(-1); |
| 1934 | if (prefix == NULL) |
| 1935 | return(-1); |
| 1936 | |
| 1937 | if (ctxt->nsHash == NULL) |
| 1938 | ctxt->nsHash = xmlHashCreate(10); |
| 1939 | if (ctxt->nsHash == NULL) |
| 1940 | return(-1); |
| 1941 | return(xmlHashUpdateEntry(ctxt->nsHash, prefix, (void *) ns_uri, |
| 1942 | (xmlHashDeallocator)xmlFree)); |
| 1943 | } |
| 1944 | |
| 1945 | /** |
| 1946 | * xmlXPathNsLookup: |
| 1947 | * @ctxt: the XPath context |
| 1948 | * @prefix: the namespace prefix value |
| 1949 | * |
| 1950 | * Search in the namespace declaration array of the context for the given |
| 1951 | * namespace name associated to the given prefix |
| 1952 | * |
| 1953 | * Returns the value or NULL if not found |
| 1954 | */ |
| 1955 | const xmlChar * |
| 1956 | xmlXPathNsLookup(xmlXPathContextPtr ctxt, const xmlChar *prefix) { |
| 1957 | if (ctxt == NULL) |
| 1958 | return(NULL); |
| 1959 | if (prefix == NULL) |
| 1960 | return(NULL); |
| 1961 | |
| 1962 | #ifdef XML_XML_NAMESPACE |
| 1963 | if (xmlStrEqual(prefix, (const xmlChar *) "xml")) |
| 1964 | return(XML_XML_NAMESPACE); |
| 1965 | #endif |
| 1966 | |
| 1967 | if (ctxt->nsHash == NULL) |
| 1968 | return(NULL); |
| 1969 | |
| 1970 | return((const xmlChar *) xmlHashLookup(ctxt->nsHash, prefix)); |
| 1971 | } |
| 1972 | |
| 1973 | /** |
| 1974 | * xmlXPathRegisteredVariablesCleanup: |
| 1975 | * @ctxt: the XPath context |
| 1976 | * |
| 1977 | * Cleanup the XPath context data associated to registered variables |
| 1978 | */ |
| 1979 | void |
| 1980 | xmlXPathRegisteredNsCleanup(xmlXPathContextPtr ctxt) { |
| 1981 | if (ctxt == NULL) |
| 1982 | return; |
| 1983 | |
| 1984 | xmlHashFree(ctxt->nsHash, NULL); |
| 1985 | ctxt->nsHash = NULL; |
| 1986 | } |
| 1987 | |
| 1988 | /************************************************************************ |
| 1989 | * * |
| 1990 | * Routines to handle Values * |
| 1991 | * * |
| 1992 | ************************************************************************/ |
| 1993 | |
| 1994 | /* Allocations are terrible, one need to optimize all this !!! */ |
| 1995 | |
| 1996 | /** |
| 1997 | * xmlXPathNewFloat: |
| 1998 | * @val: the double value |
| 1999 | * |
| 2000 | * Create a new xmlXPathObjectPtr of type double and of value @val |
| 2001 | * |
| 2002 | * Returns the newly created object. |
| 2003 | */ |
| 2004 | xmlXPathObjectPtr |
| 2005 | xmlXPathNewFloat(double val) { |
| 2006 | xmlXPathObjectPtr ret; |
| 2007 | |
| 2008 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 2009 | if (ret == NULL) { |
| 2010 | xmlGenericError(xmlGenericErrorContext, |
| 2011 | "xmlXPathNewFloat: out of memory\n"); |
| 2012 | return(NULL); |
| 2013 | } |
| 2014 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 2015 | ret->type = XPATH_NUMBER; |
| 2016 | ret->floatval = val; |
| 2017 | return(ret); |
| 2018 | } |
| 2019 | |
| 2020 | /** |
| 2021 | * xmlXPathNewBoolean: |
| 2022 | * @val: the boolean value |
| 2023 | * |
| 2024 | * Create a new xmlXPathObjectPtr of type boolean and of value @val |
| 2025 | * |
| 2026 | * Returns the newly created object. |
| 2027 | */ |
| 2028 | xmlXPathObjectPtr |
| 2029 | xmlXPathNewBoolean(int val) { |
| 2030 | xmlXPathObjectPtr ret; |
| 2031 | |
| 2032 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 2033 | if (ret == NULL) { |
| 2034 | xmlGenericError(xmlGenericErrorContext, |
| 2035 | "xmlXPathNewBoolean: out of memory\n"); |
| 2036 | return(NULL); |
| 2037 | } |
| 2038 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 2039 | ret->type = XPATH_BOOLEAN; |
| 2040 | ret->boolval = (val != 0); |
| 2041 | return(ret); |
| 2042 | } |
| 2043 | |
| 2044 | /** |
| 2045 | * xmlXPathNewString: |
| 2046 | * @val: the xmlChar * value |
| 2047 | * |
| 2048 | * Create a new xmlXPathObjectPtr of type string and of value @val |
| 2049 | * |
| 2050 | * Returns the newly created object. |
| 2051 | */ |
| 2052 | xmlXPathObjectPtr |
| 2053 | xmlXPathNewString(const xmlChar *val) { |
| 2054 | xmlXPathObjectPtr ret; |
| 2055 | |
| 2056 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 2057 | if (ret == NULL) { |
| 2058 | xmlGenericError(xmlGenericErrorContext, |
| 2059 | "xmlXPathNewString: out of memory\n"); |
| 2060 | return(NULL); |
| 2061 | } |
| 2062 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 2063 | ret->type = XPATH_STRING; |
| 2064 | if (val != NULL) |
| 2065 | ret->stringval = xmlStrdup(val); |
| 2066 | else |
| 2067 | ret->stringval = xmlStrdup((const xmlChar *)""); |
| 2068 | return(ret); |
| 2069 | } |
| 2070 | |
| 2071 | /** |
| 2072 | * xmlXPathNewCString: |
| 2073 | * @val: the char * value |
| 2074 | * |
| 2075 | * Create a new xmlXPathObjectPtr of type string and of value @val |
| 2076 | * |
| 2077 | * Returns the newly created object. |
| 2078 | */ |
| 2079 | xmlXPathObjectPtr |
| 2080 | xmlXPathNewCString(const char *val) { |
| 2081 | xmlXPathObjectPtr ret; |
| 2082 | |
| 2083 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 2084 | if (ret == NULL) { |
| 2085 | xmlGenericError(xmlGenericErrorContext, |
| 2086 | "xmlXPathNewCString: out of memory\n"); |
| 2087 | return(NULL); |
| 2088 | } |
| 2089 | memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); |
| 2090 | ret->type = XPATH_STRING; |
| 2091 | ret->stringval = xmlStrdup(BAD_CAST val); |
| 2092 | return(ret); |
| 2093 | } |
| 2094 | |
| 2095 | /** |
| 2096 | * xmlXPathObjectCopy: |
| 2097 | * @val: the original object |
| 2098 | * |
| 2099 | * allocate a new copy of a given object |
| 2100 | * |
| 2101 | * Returns the newly created object. |
| 2102 | */ |
| 2103 | xmlXPathObjectPtr |
| 2104 | xmlXPathObjectCopy(xmlXPathObjectPtr val) { |
| 2105 | xmlXPathObjectPtr ret; |
| 2106 | |
| 2107 | if (val == NULL) |
| 2108 | return(NULL); |
| 2109 | |
| 2110 | ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); |
| 2111 | if (ret == NULL) { |
| 2112 | xmlGenericError(xmlGenericErrorContext, |
| 2113 | "xmlXPathObjectCopy: out of memory\n"); |
| 2114 | return(NULL); |
| 2115 | } |
| 2116 | memcpy(ret, val , (size_t) sizeof(xmlXPathObject)); |
| 2117 | switch (val->type) { |
| 2118 | case XPATH_BOOLEAN: |
| 2119 | case XPATH_NUMBER: |
| 2120 | case XPATH_POINT: |
| 2121 | case XPATH_RANGE: |
| 2122 | break; |
| 2123 | case XPATH_STRING: |
| 2124 | ret->stringval = xmlStrdup(val->stringval); |
| 2125 | break; |
| 2126 | case XPATH_XSLT_TREE: |
| 2127 | if ((val->nodesetval != NULL) && |
| 2128 | (val->nodesetval->nodeTab != NULL)) |
| 2129 | ret->nodesetval = xmlXPathNodeSetCreate( |
| 2130 | xmlCopyNode(val->nodesetval->nodeTab[0], 1)); |
| 2131 | else |
| 2132 | ret->nodesetval = xmlXPathNodeSetCreate(NULL); |
| 2133 | break; |
| 2134 | case XPATH_NODESET: |
| 2135 | ret->nodesetval = xmlXPathNodeSetMerge(NULL, val->nodesetval); |
| 2136 | break; |
| 2137 | case XPATH_LOCATIONSET: |
| 2138 | #ifdef LIBXML_XPTR_ENABLED |
| 2139 | { |
| 2140 | xmlLocationSetPtr loc = val->user; |
| 2141 | ret->user = (void *) xmlXPtrLocationSetMerge(NULL, loc); |
| 2142 | break; |
| 2143 | } |
| 2144 | #endif |
| 2145 | case XPATH_UNDEFINED: |
| 2146 | case XPATH_USERS: |
| 2147 | xmlGenericError(xmlGenericErrorContext, |
| 2148 | "xmlXPathObjectCopy: unsupported type %d\n", |
| 2149 | val->type); |
| 2150 | break; |
| 2151 | } |
| 2152 | return(ret); |
| 2153 | } |
| 2154 | |
| 2155 | /** |
| 2156 | * xmlXPathFreeObject: |
| 2157 | * @obj: the object to free |
| 2158 | * |
| 2159 | * Free up an xmlXPathObjectPtr object. |
| 2160 | */ |
| 2161 | void |
| 2162 | xmlXPathFreeObject(xmlXPathObjectPtr obj) { |
| 2163 | if (obj == NULL) return; |
| 2164 | if (obj->type == XPATH_NODESET) { |
Daniel Veillard | 7785171 | 2001-02-27 21:54:07 +0000 | [diff] [blame] | 2165 | if (obj->boolval) { |
| 2166 | obj->type = XPATH_XSLT_TREE; |
| 2167 | if (obj->nodesetval != NULL) |
| 2168 | xmlXPathFreeValueTree(obj->nodesetval); |
| 2169 | } else { |
| 2170 | if (obj->nodesetval != NULL) |
| 2171 | xmlXPathFreeNodeSet(obj->nodesetval); |
| 2172 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2173 | #ifdef LIBXML_XPTR_ENABLED |
| 2174 | } else if (obj->type == XPATH_LOCATIONSET) { |
| 2175 | if (obj->user != NULL) |
| 2176 | xmlXPtrFreeLocationSet(obj->user); |
| 2177 | #endif |
| 2178 | } else if (obj->type == XPATH_STRING) { |
| 2179 | if (obj->stringval != NULL) |
| 2180 | xmlFree(obj->stringval); |
| 2181 | } else if (obj->type == XPATH_XSLT_TREE) { |
| 2182 | if (obj->nodesetval != NULL) |
| 2183 | xmlXPathFreeValueTree(obj->nodesetval); |
| 2184 | } |
| 2185 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2186 | xmlFree(obj); |
| 2187 | } |
| 2188 | |
| 2189 | /************************************************************************ |
| 2190 | * * |
| 2191 | * Routines to handle XPath contexts * |
| 2192 | * * |
| 2193 | ************************************************************************/ |
| 2194 | |
| 2195 | /** |
| 2196 | * xmlXPathNewContext: |
| 2197 | * @doc: the XML document |
| 2198 | * |
| 2199 | * Create a new xmlXPathContext |
| 2200 | * |
| 2201 | * Returns the xmlXPathContext just allocated. |
| 2202 | */ |
| 2203 | xmlXPathContextPtr |
| 2204 | xmlXPathNewContext(xmlDocPtr doc) { |
| 2205 | xmlXPathContextPtr ret; |
| 2206 | |
| 2207 | ret = (xmlXPathContextPtr) xmlMalloc(sizeof(xmlXPathContext)); |
| 2208 | if (ret == NULL) { |
| 2209 | xmlGenericError(xmlGenericErrorContext, |
| 2210 | "xmlXPathNewContext: out of memory\n"); |
| 2211 | return(NULL); |
| 2212 | } |
| 2213 | memset(ret, 0 , (size_t) sizeof(xmlXPathContext)); |
| 2214 | ret->doc = doc; |
| 2215 | ret->node = NULL; |
| 2216 | |
| 2217 | ret->varHash = NULL; |
| 2218 | |
| 2219 | ret->nb_types = 0; |
| 2220 | ret->max_types = 0; |
| 2221 | ret->types = NULL; |
| 2222 | |
| 2223 | ret->funcHash = xmlHashCreate(0); |
| 2224 | |
| 2225 | ret->nb_axis = 0; |
| 2226 | ret->max_axis = 0; |
| 2227 | ret->axis = NULL; |
| 2228 | |
| 2229 | ret->nsHash = NULL; |
| 2230 | ret->user = NULL; |
| 2231 | |
| 2232 | ret->contextSize = -1; |
| 2233 | ret->proximityPosition = -1; |
| 2234 | |
| 2235 | xmlXPathRegisterAllFunctions(ret); |
| 2236 | |
| 2237 | return(ret); |
| 2238 | } |
| 2239 | |
| 2240 | /** |
| 2241 | * xmlXPathFreeContext: |
| 2242 | * @ctxt: the context to free |
| 2243 | * |
| 2244 | * Free up an xmlXPathContext |
| 2245 | */ |
| 2246 | void |
| 2247 | xmlXPathFreeContext(xmlXPathContextPtr ctxt) { |
| 2248 | xmlXPathRegisteredNsCleanup(ctxt); |
| 2249 | xmlXPathRegisteredFuncsCleanup(ctxt); |
| 2250 | xmlXPathRegisteredVariablesCleanup(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2251 | xmlFree(ctxt); |
| 2252 | } |
| 2253 | |
| 2254 | /************************************************************************ |
| 2255 | * * |
| 2256 | * Routines to handle XPath parser contexts * |
| 2257 | * * |
| 2258 | ************************************************************************/ |
| 2259 | |
| 2260 | #define CHECK_CTXT(ctxt) \ |
| 2261 | if (ctxt == NULL) { \ |
| 2262 | xmlGenericError(xmlGenericErrorContext, \ |
| 2263 | "%s:%d Internal error: ctxt == NULL\n", \ |
| 2264 | __FILE__, __LINE__); \ |
| 2265 | } \ |
| 2266 | |
| 2267 | |
| 2268 | #define CHECK_CONTEXT(ctxt) \ |
| 2269 | if (ctxt == NULL) { \ |
| 2270 | xmlGenericError(xmlGenericErrorContext, \ |
| 2271 | "%s:%d Internal error: no context\n", \ |
| 2272 | __FILE__, __LINE__); \ |
| 2273 | } \ |
| 2274 | else if (ctxt->doc == NULL) { \ |
| 2275 | xmlGenericError(xmlGenericErrorContext, \ |
| 2276 | "%s:%d Internal error: no document\n", \ |
| 2277 | __FILE__, __LINE__); \ |
| 2278 | } \ |
| 2279 | else if (ctxt->doc->children == NULL) { \ |
| 2280 | xmlGenericError(xmlGenericErrorContext, \ |
| 2281 | "%s:%d Internal error: document without root\n", \ |
| 2282 | __FILE__, __LINE__); \ |
| 2283 | } \ |
| 2284 | |
| 2285 | |
| 2286 | /** |
| 2287 | * xmlXPathNewParserContext: |
| 2288 | * @str: the XPath expression |
| 2289 | * @ctxt: the XPath context |
| 2290 | * |
| 2291 | * Create a new xmlXPathParserContext |
| 2292 | * |
| 2293 | * Returns the xmlXPathParserContext just allocated. |
| 2294 | */ |
| 2295 | xmlXPathParserContextPtr |
| 2296 | xmlXPathNewParserContext(const xmlChar *str, xmlXPathContextPtr ctxt) { |
| 2297 | xmlXPathParserContextPtr ret; |
| 2298 | |
| 2299 | ret = (xmlXPathParserContextPtr) xmlMalloc(sizeof(xmlXPathParserContext)); |
| 2300 | if (ret == NULL) { |
| 2301 | xmlGenericError(xmlGenericErrorContext, |
| 2302 | "xmlXPathNewParserContext: out of memory\n"); |
| 2303 | return(NULL); |
| 2304 | } |
| 2305 | memset(ret, 0 , (size_t) sizeof(xmlXPathParserContext)); |
| 2306 | ret->cur = ret->base = str; |
| 2307 | ret->context = ctxt; |
| 2308 | |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 2309 | ret->comp = xmlXPathNewCompExpr(); |
| 2310 | if (ret->comp == NULL) { |
| 2311 | xmlFree(ret->valueTab); |
| 2312 | xmlFree(ret); |
| 2313 | return(NULL); |
| 2314 | } |
| 2315 | |
| 2316 | return(ret); |
| 2317 | } |
| 2318 | |
| 2319 | /** |
| 2320 | * xmlXPathCompParserContext: |
| 2321 | * @comp: the XPath compiled expression |
| 2322 | * @ctxt: the XPath context |
| 2323 | * |
| 2324 | * Create a new xmlXPathParserContext when processing a compiled expression |
| 2325 | * |
| 2326 | * Returns the xmlXPathParserContext just allocated. |
| 2327 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2328 | static xmlXPathParserContextPtr |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 2329 | xmlXPathCompParserContext(xmlXPathCompExprPtr comp, xmlXPathContextPtr ctxt) { |
| 2330 | xmlXPathParserContextPtr ret; |
| 2331 | |
| 2332 | ret = (xmlXPathParserContextPtr) xmlMalloc(sizeof(xmlXPathParserContext)); |
| 2333 | if (ret == NULL) { |
| 2334 | xmlGenericError(xmlGenericErrorContext, |
| 2335 | "xmlXPathNewParserContext: out of memory\n"); |
| 2336 | return(NULL); |
| 2337 | } |
| 2338 | memset(ret, 0 , (size_t) sizeof(xmlXPathParserContext)); |
| 2339 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2340 | /* Allocate the value stack */ |
| 2341 | ret->valueTab = (xmlXPathObjectPtr *) |
| 2342 | xmlMalloc(10 * sizeof(xmlXPathObjectPtr)); |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 2343 | if (ret->valueTab == NULL) { |
| 2344 | xmlFree(ret); |
| 2345 | xmlGenericError(xmlGenericErrorContext, |
| 2346 | "xmlXPathNewParserContext: out of memory\n"); |
| 2347 | return(NULL); |
| 2348 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2349 | ret->valueNr = 0; |
| 2350 | ret->valueMax = 10; |
| 2351 | ret->value = NULL; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 2352 | |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 2353 | ret->context = ctxt; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 2354 | ret->comp = comp; |
| 2355 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2356 | return(ret); |
| 2357 | } |
| 2358 | |
| 2359 | /** |
| 2360 | * xmlXPathFreeParserContext: |
| 2361 | * @ctxt: the context to free |
| 2362 | * |
| 2363 | * Free up an xmlXPathParserContext |
| 2364 | */ |
| 2365 | void |
| 2366 | xmlXPathFreeParserContext(xmlXPathParserContextPtr ctxt) { |
| 2367 | if (ctxt->valueTab != NULL) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2368 | xmlFree(ctxt->valueTab); |
| 2369 | } |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 2370 | if (ctxt->comp) |
| 2371 | xmlXPathFreeCompExpr(ctxt->comp); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2372 | xmlFree(ctxt); |
| 2373 | } |
| 2374 | |
| 2375 | /************************************************************************ |
| 2376 | * * |
| 2377 | * The implicit core function library * |
| 2378 | * * |
| 2379 | ************************************************************************/ |
| 2380 | |
| 2381 | /* |
| 2382 | * Auto-pop and cast to a number |
| 2383 | */ |
| 2384 | void xmlXPathNumberFunction(xmlXPathParserContextPtr ctxt, int nargs); |
| 2385 | |
| 2386 | |
| 2387 | #define POP_FLOAT \ |
| 2388 | arg = valuePop(ctxt); \ |
| 2389 | if (arg == NULL) { \ |
| 2390 | XP_ERROR(XPATH_INVALID_OPERAND); \ |
| 2391 | } \ |
| 2392 | if (arg->type != XPATH_NUMBER) { \ |
| 2393 | valuePush(ctxt, arg); \ |
| 2394 | xmlXPathNumberFunction(ctxt, 1); \ |
| 2395 | arg = valuePop(ctxt); \ |
| 2396 | } |
| 2397 | |
| 2398 | /** |
| 2399 | * xmlXPathCompareNodeSetFloat: |
| 2400 | * @ctxt: the XPath Parser context |
| 2401 | * @inf: less than (1) or greater than (0) |
| 2402 | * @strict: is the comparison strict |
| 2403 | * @arg: the node set |
| 2404 | * @f: the value |
| 2405 | * |
| 2406 | * Implement the compare operation between a nodeset and a number |
| 2407 | * @ns < @val (1, 1, ... |
| 2408 | * @ns <= @val (1, 0, ... |
| 2409 | * @ns > @val (0, 1, ... |
| 2410 | * @ns >= @val (0, 0, ... |
| 2411 | * |
| 2412 | * If one object to be compared is a node-set and the other is a number, |
| 2413 | * then the comparison will be true if and only if there is a node in the |
| 2414 | * node-set such that the result of performing the comparison on the number |
| 2415 | * to be compared and on the result of converting the string-value of that |
| 2416 | * node to a number using the number function is true. |
| 2417 | * |
| 2418 | * Returns 0 or 1 depending on the results of the test. |
| 2419 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2420 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2421 | xmlXPathCompareNodeSetFloat(xmlXPathParserContextPtr ctxt, int inf, int strict, |
| 2422 | xmlXPathObjectPtr arg, xmlXPathObjectPtr f) { |
| 2423 | int i, ret = 0; |
| 2424 | xmlNodeSetPtr ns; |
| 2425 | xmlChar *str2; |
| 2426 | |
| 2427 | if ((f == NULL) || (arg == NULL) || |
| 2428 | ((arg->type != XPATH_NODESET) && (arg->type != XPATH_XSLT_TREE))) { |
| 2429 | xmlXPathFreeObject(arg); |
| 2430 | xmlXPathFreeObject(f); |
| 2431 | return(0); |
| 2432 | } |
| 2433 | ns = arg->nodesetval; |
| 2434 | for (i = 0;i < ns->nodeNr;i++) { |
| 2435 | str2 = xmlNodeGetContent(ns->nodeTab[i]); |
| 2436 | if (str2 != NULL) { |
| 2437 | valuePush(ctxt, |
| 2438 | xmlXPathNewString(str2)); |
| 2439 | xmlFree(str2); |
| 2440 | xmlXPathNumberFunction(ctxt, 1); |
| 2441 | valuePush(ctxt, xmlXPathObjectCopy(f)); |
| 2442 | ret = xmlXPathCompareValues(ctxt, inf, strict); |
| 2443 | if (ret) |
| 2444 | break; |
| 2445 | } |
| 2446 | } |
| 2447 | xmlXPathFreeObject(arg); |
| 2448 | xmlXPathFreeObject(f); |
| 2449 | return(ret); |
| 2450 | } |
| 2451 | |
| 2452 | /** |
| 2453 | * xmlXPathCompareNodeSetString: |
| 2454 | * @ctxt: the XPath Parser context |
| 2455 | * @inf: less than (1) or greater than (0) |
| 2456 | * @strict: is the comparison strict |
| 2457 | * @arg: the node set |
| 2458 | * @s: the value |
| 2459 | * |
| 2460 | * Implement the compare operation between a nodeset and a string |
| 2461 | * @ns < @val (1, 1, ... |
| 2462 | * @ns <= @val (1, 0, ... |
| 2463 | * @ns > @val (0, 1, ... |
| 2464 | * @ns >= @val (0, 0, ... |
| 2465 | * |
| 2466 | * If one object to be compared is a node-set and the other is a string, |
| 2467 | * then the comparison will be true if and only if there is a node in |
| 2468 | * the node-set such that the result of performing the comparison on the |
| 2469 | * string-value of the node and the other string is true. |
| 2470 | * |
| 2471 | * Returns 0 or 1 depending on the results of the test. |
| 2472 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2473 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2474 | xmlXPathCompareNodeSetString(xmlXPathParserContextPtr ctxt, int inf, int strict, |
| 2475 | xmlXPathObjectPtr arg, xmlXPathObjectPtr s) { |
| 2476 | int i, ret = 0; |
| 2477 | xmlNodeSetPtr ns; |
| 2478 | xmlChar *str2; |
| 2479 | |
| 2480 | if ((s == NULL) || (arg == NULL) || |
| 2481 | ((arg->type != XPATH_NODESET) && (arg->type != XPATH_XSLT_TREE))) { |
| 2482 | xmlXPathFreeObject(arg); |
| 2483 | xmlXPathFreeObject(s); |
| 2484 | return(0); |
| 2485 | } |
| 2486 | ns = arg->nodesetval; |
| 2487 | for (i = 0;i < ns->nodeNr;i++) { |
| 2488 | str2 = xmlNodeGetContent(ns->nodeTab[i]); |
| 2489 | if (str2 != NULL) { |
| 2490 | valuePush(ctxt, |
| 2491 | xmlXPathNewString(str2)); |
| 2492 | xmlFree(str2); |
| 2493 | valuePush(ctxt, xmlXPathObjectCopy(s)); |
| 2494 | ret = xmlXPathCompareValues(ctxt, inf, strict); |
| 2495 | if (ret) |
| 2496 | break; |
| 2497 | } |
| 2498 | } |
| 2499 | xmlXPathFreeObject(arg); |
| 2500 | xmlXPathFreeObject(s); |
| 2501 | return(ret); |
| 2502 | } |
| 2503 | |
| 2504 | /** |
| 2505 | * xmlXPathCompareNodeSets: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2506 | * @op: less than (-1), equal (0) or greater than (1) |
| 2507 | * @strict: is the comparison strict |
| 2508 | * @arg1: the fist node set object |
| 2509 | * @arg2: the second node set object |
| 2510 | * |
| 2511 | * Implement the compare operation on nodesets: |
| 2512 | * |
| 2513 | * If both objects to be compared are node-sets, then the comparison |
| 2514 | * will be true if and only if there is a node in the first node-set |
| 2515 | * and a node in the second node-set such that the result of performing |
| 2516 | * the comparison on the string-values of the two nodes is true. |
| 2517 | * .... |
| 2518 | * When neither object to be compared is a node-set and the operator |
| 2519 | * is <=, <, >= or >, then the objects are compared by converting both |
| 2520 | * objects to numbers and comparing the numbers according to IEEE 754. |
| 2521 | * .... |
| 2522 | * The number function converts its argument to a number as follows: |
| 2523 | * - a string that consists of optional whitespace followed by an |
| 2524 | * optional minus sign followed by a Number followed by whitespace |
| 2525 | * is converted to the IEEE 754 number that is nearest (according |
| 2526 | * to the IEEE 754 round-to-nearest rule) to the mathematical value |
| 2527 | * represented by the string; any other string is converted to NaN |
| 2528 | * |
| 2529 | * Conclusion all nodes need to be converted first to their string value |
| 2530 | * and then the comparison must be done when possible |
| 2531 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2532 | static int |
| 2533 | xmlXPathCompareNodeSets(int inf, int strict, |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2534 | xmlXPathObjectPtr arg1, xmlXPathObjectPtr arg2) { |
| 2535 | int i, j, init = 0; |
| 2536 | double val1; |
| 2537 | double *values2; |
| 2538 | int ret = 0; |
| 2539 | xmlChar *str; |
| 2540 | xmlNodeSetPtr ns1; |
| 2541 | xmlNodeSetPtr ns2; |
| 2542 | |
| 2543 | if ((arg1 == NULL) || |
Daniel Veillard | 4dd9346 | 2001-04-02 15:16:19 +0000 | [diff] [blame^] | 2544 | ((arg1->type != XPATH_NODESET) && (arg1->type != XPATH_XSLT_TREE))) { |
| 2545 | xmlXPathFreeObject(arg2); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2546 | return(0); |
Daniel Veillard | 4dd9346 | 2001-04-02 15:16:19 +0000 | [diff] [blame^] | 2547 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2548 | if ((arg2 == NULL) || |
Daniel Veillard | 4dd9346 | 2001-04-02 15:16:19 +0000 | [diff] [blame^] | 2549 | ((arg2->type != XPATH_NODESET) && (arg2->type != XPATH_XSLT_TREE))) { |
| 2550 | xmlXPathFreeObject(arg1); |
| 2551 | xmlXPathFreeObject(arg2); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2552 | return(0); |
Daniel Veillard | 4dd9346 | 2001-04-02 15:16:19 +0000 | [diff] [blame^] | 2553 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2554 | |
| 2555 | ns1 = arg1->nodesetval; |
| 2556 | ns2 = arg2->nodesetval; |
| 2557 | |
Daniel Veillard | 4dd9346 | 2001-04-02 15:16:19 +0000 | [diff] [blame^] | 2558 | if (ns1->nodeNr <= 0) { |
| 2559 | xmlXPathFreeObject(arg1); |
| 2560 | xmlXPathFreeObject(arg2); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2561 | return(0); |
Daniel Veillard | 4dd9346 | 2001-04-02 15:16:19 +0000 | [diff] [blame^] | 2562 | } |
| 2563 | if (ns2->nodeNr <= 0) { |
| 2564 | xmlXPathFreeObject(arg1); |
| 2565 | xmlXPathFreeObject(arg2); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2566 | return(0); |
Daniel Veillard | 4dd9346 | 2001-04-02 15:16:19 +0000 | [diff] [blame^] | 2567 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2568 | |
| 2569 | values2 = (double *) xmlMalloc(ns2->nodeNr * sizeof(double)); |
| 2570 | if (values2 == NULL) { |
Daniel Veillard | 4dd9346 | 2001-04-02 15:16:19 +0000 | [diff] [blame^] | 2571 | xmlXPathFreeObject(arg1); |
| 2572 | xmlXPathFreeObject(arg2); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2573 | return(0); |
| 2574 | } |
| 2575 | for (i = 0;i < ns1->nodeNr;i++) { |
| 2576 | str = xmlNodeGetContent(ns1->nodeTab[i]); |
| 2577 | if (str == NULL) |
| 2578 | continue; |
| 2579 | val1 = xmlXPathStringEvalNumber(str); |
| 2580 | xmlFree(str); |
| 2581 | if (isnan(val1)) |
| 2582 | continue; |
| 2583 | for (j = 0;j < ns2->nodeNr;j++) { |
| 2584 | if (init == 0) { |
| 2585 | str = xmlNodeGetContent(ns2->nodeTab[j]); |
| 2586 | if (str == NULL) { |
| 2587 | values2[j] = xmlXPathNAN; |
| 2588 | } else { |
| 2589 | values2[j] = xmlXPathStringEvalNumber(str); |
| 2590 | xmlFree(str); |
| 2591 | } |
| 2592 | } |
| 2593 | if (isnan(values2[j])) |
| 2594 | continue; |
| 2595 | if (inf && strict) |
| 2596 | ret = (val1 < values2[j]); |
| 2597 | else if (inf && !strict) |
| 2598 | ret = (val1 <= values2[j]); |
| 2599 | else if (!inf && strict) |
| 2600 | ret = (val1 > values2[j]); |
| 2601 | else if (!inf && !strict) |
| 2602 | ret = (val1 >= values2[j]); |
| 2603 | if (ret) |
| 2604 | break; |
| 2605 | } |
| 2606 | if (ret) |
| 2607 | break; |
| 2608 | init = 1; |
| 2609 | } |
| 2610 | xmlFree(values2); |
Daniel Veillard | 4dd9346 | 2001-04-02 15:16:19 +0000 | [diff] [blame^] | 2611 | xmlXPathFreeObject(arg1); |
| 2612 | xmlXPathFreeObject(arg2); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2613 | return(ret); |
| 2614 | return(0); |
| 2615 | } |
| 2616 | |
| 2617 | /** |
| 2618 | * xmlXPathCompareNodeSetValue: |
| 2619 | * @ctxt: the XPath Parser context |
| 2620 | * @inf: less than (1) or greater than (0) |
| 2621 | * @strict: is the comparison strict |
| 2622 | * @arg: the node set |
| 2623 | * @val: the value |
| 2624 | * |
| 2625 | * Implement the compare operation between a nodeset and a value |
| 2626 | * @ns < @val (1, 1, ... |
| 2627 | * @ns <= @val (1, 0, ... |
| 2628 | * @ns > @val (0, 1, ... |
| 2629 | * @ns >= @val (0, 0, ... |
| 2630 | * |
| 2631 | * If one object to be compared is a node-set and the other is a boolean, |
| 2632 | * then the comparison will be true if and only if the result of performing |
| 2633 | * the comparison on the boolean and on the result of converting |
| 2634 | * the node-set to a boolean using the boolean function is true. |
| 2635 | * |
| 2636 | * Returns 0 or 1 depending on the results of the test. |
| 2637 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2638 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2639 | xmlXPathCompareNodeSetValue(xmlXPathParserContextPtr ctxt, int inf, int strict, |
| 2640 | xmlXPathObjectPtr arg, xmlXPathObjectPtr val) { |
| 2641 | if ((val == NULL) || (arg == NULL) || |
| 2642 | ((arg->type != XPATH_NODESET) && (arg->type != XPATH_XSLT_TREE))) |
| 2643 | return(0); |
| 2644 | |
| 2645 | switch(val->type) { |
| 2646 | case XPATH_NUMBER: |
| 2647 | return(xmlXPathCompareNodeSetFloat(ctxt, inf, strict, arg, val)); |
| 2648 | case XPATH_NODESET: |
| 2649 | case XPATH_XSLT_TREE: |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2650 | return(xmlXPathCompareNodeSets(inf, strict, arg, val)); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2651 | case XPATH_STRING: |
| 2652 | return(xmlXPathCompareNodeSetString(ctxt, inf, strict, arg, val)); |
| 2653 | case XPATH_BOOLEAN: |
| 2654 | valuePush(ctxt, arg); |
| 2655 | xmlXPathBooleanFunction(ctxt, 1); |
| 2656 | valuePush(ctxt, val); |
| 2657 | return(xmlXPathCompareValues(ctxt, inf, strict)); |
| 2658 | default: |
| 2659 | TODO |
| 2660 | return(0); |
| 2661 | } |
| 2662 | return(0); |
| 2663 | } |
| 2664 | |
| 2665 | /** |
| 2666 | * xmlXPathEqualNodeSetString |
| 2667 | * @arg: the nodeset object argument |
| 2668 | * @str: the string to compare to. |
| 2669 | * |
| 2670 | * Implement the equal operation on XPath objects content: @arg1 == @arg2 |
| 2671 | * If one object to be compared is a node-set and the other is a string, |
| 2672 | * then the comparison will be true if and only if there is a node in |
| 2673 | * the node-set such that the result of performing the comparison on the |
| 2674 | * string-value of the node and the other string is true. |
| 2675 | * |
| 2676 | * Returns 0 or 1 depending on the results of the test. |
| 2677 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2678 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2679 | xmlXPathEqualNodeSetString(xmlXPathObjectPtr arg, const xmlChar *str) { |
| 2680 | int i; |
| 2681 | xmlNodeSetPtr ns; |
| 2682 | xmlChar *str2; |
| 2683 | |
| 2684 | if ((str == NULL) || (arg == NULL) || |
| 2685 | ((arg->type != XPATH_NODESET) && (arg->type != XPATH_XSLT_TREE))) |
| 2686 | return(0); |
| 2687 | ns = arg->nodesetval; |
| 2688 | if (ns->nodeNr <= 0) |
| 2689 | return(0); |
| 2690 | for (i = 0;i < ns->nodeNr;i++) { |
| 2691 | str2 = xmlNodeGetContent(ns->nodeTab[i]); |
| 2692 | if ((str2 != NULL) && (xmlStrEqual(str, str2))) { |
| 2693 | xmlFree(str2); |
| 2694 | return(1); |
| 2695 | } |
| 2696 | if (str2 != NULL) |
| 2697 | xmlFree(str2); |
| 2698 | } |
| 2699 | return(0); |
| 2700 | } |
| 2701 | |
| 2702 | /** |
| 2703 | * xmlXPathEqualNodeSetFloat |
| 2704 | * @arg: the nodeset object argument |
| 2705 | * @f: the float to compare to |
| 2706 | * |
| 2707 | * Implement the equal operation on XPath objects content: @arg1 == @arg2 |
| 2708 | * If one object to be compared is a node-set and the other is a number, |
| 2709 | * then the comparison will be true if and only if there is a node in |
| 2710 | * the node-set such that the result of performing the comparison on the |
| 2711 | * number to be compared and on the result of converting the string-value |
| 2712 | * of that node to a number using the number function is true. |
| 2713 | * |
| 2714 | * Returns 0 or 1 depending on the results of the test. |
| 2715 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2716 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2717 | xmlXPathEqualNodeSetFloat(xmlXPathObjectPtr arg, double f) { |
| 2718 | char buf[100] = ""; |
| 2719 | |
| 2720 | if ((arg == NULL) || |
| 2721 | ((arg->type != XPATH_NODESET) && (arg->type != XPATH_XSLT_TREE))) |
| 2722 | return(0); |
| 2723 | |
Bjorn Reese | e1dc011 | 2001-03-03 12:09:03 +0000 | [diff] [blame] | 2724 | xmlXPathFormatNumber(f, buf, sizeof(buf)); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2725 | return(xmlXPathEqualNodeSetString(arg, BAD_CAST buf)); |
| 2726 | } |
| 2727 | |
| 2728 | |
| 2729 | /** |
| 2730 | * xmlXPathEqualNodeSets |
| 2731 | * @arg1: first nodeset object argument |
| 2732 | * @arg2: second nodeset object argument |
| 2733 | * |
| 2734 | * Implement the equal operation on XPath nodesets: @arg1 == @arg2 |
| 2735 | * If both objects to be compared are node-sets, then the comparison |
| 2736 | * will be true if and only if there is a node in the first node-set and |
| 2737 | * a node in the second node-set such that the result of performing the |
| 2738 | * comparison on the string-values of the two nodes is true. |
| 2739 | * |
| 2740 | * (needless to say, this is a costly operation) |
| 2741 | * |
| 2742 | * Returns 0 or 1 depending on the results of the test. |
| 2743 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 2744 | static int |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 2745 | xmlXPathEqualNodeSets(xmlXPathObjectPtr arg1, xmlXPathObjectPtr arg2) { |
| 2746 | int i, j; |
| 2747 | xmlChar **values1; |
| 2748 | xmlChar **values2; |
| 2749 | int ret = 0; |
| 2750 | xmlNodeSetPtr ns1; |
| 2751 | xmlNodeSetPtr ns2; |
| 2752 | |
| 2753 | if ((arg1 == NULL) || |
| 2754 | ((arg1->type != XPATH_NODESET) && (arg1->type != XPATH_XSLT_TREE))) |
| 2755 | return(0); |
| 2756 | if ((arg2 == NULL) || |
| 2757 | ((arg2->type != XPATH_NODESET) && (arg2->type != XPATH_XSLT_TREE))) |
| 2758 | return(0); |
| 2759 | |
| 2760 | ns1 = arg1->nodesetval; |
| 2761 | ns2 = arg2->nodesetval; |
| 2762 | |
| 2763 | if (ns1->nodeNr <= 0) |
| 2764 | return(0); |
| 2765 | if (ns2->nodeNr <= 0) |
| 2766 | return(0); |
| 2767 | |
| 2768 | /* |
| 2769 | * check if there is a node pertaining to both sets |
| 2770 | */ |
| 2771 | for (i = 0;i < ns1->nodeNr;i++) |
| 2772 | for (j = 0;j < ns2->nodeNr;j++) |
| 2773 | if (ns1->nodeTab[i] == ns2->nodeTab[j]) |
| 2774 | return(1); |
| 2775 | |
| 2776 | values1 = (xmlChar **) xmlMalloc(ns1->nodeNr * sizeof(xmlChar *)); |
| 2777 | if (values1 == NULL) |
| 2778 | return(0); |
| 2779 | memset(values1, 0, ns1->nodeNr * sizeof(xmlChar *)); |
| 2780 | values2 = (xmlChar **) xmlMalloc(ns2->nodeNr * sizeof(xmlChar *)); |
| 2781 | if (values2 == NULL) { |
| 2782 | xmlFree(values1); |
| 2783 | return(0); |
| 2784 | } |
| 2785 | memset(values2, 0, ns2->nodeNr * sizeof(xmlChar *)); |
| 2786 | for (i = 0;i < ns1->nodeNr;i++) { |
| 2787 | values1[i] = xmlNodeGetContent(ns1->nodeTab[i]); |
| 2788 | for (j = 0;j < ns2->nodeNr;j++) { |
| 2789 | if (i == 0) |
| 2790 | values2[j] = xmlNodeGetContent(ns2->nodeTab[j]); |
| 2791 | ret = xmlStrEqual(values1[i], values2[j]); |
| 2792 | if (ret) |
| 2793 | break; |
| 2794 | } |
| 2795 | if (ret) |
| 2796 | break; |
| 2797 | } |
| 2798 | for (i = 0;i < ns1->nodeNr;i++) |
| 2799 | if (values1[i] != NULL) |
| 2800 | xmlFree(values1[i]); |
| 2801 | for (j = 0;j < ns2->nodeNr;j++) |
| 2802 | if (values2[j] != NULL) |
| 2803 | xmlFree(values2[j]); |
| 2804 | xmlFree(values1); |
| 2805 | xmlFree(values2); |
| 2806 | return(ret); |
| 2807 | } |
| 2808 | |
| 2809 | /** |
| 2810 | * xmlXPathEqualValues: |
| 2811 | * @ctxt: the XPath Parser context |
| 2812 | * |
| 2813 | * Implement the equal operation on XPath objects content: @arg1 == @arg2 |
| 2814 | * |
| 2815 | * Returns 0 or 1 depending on the results of the test. |
| 2816 | */ |
| 2817 | int |
| 2818 | xmlXPathEqualValues(xmlXPathParserContextPtr ctxt) { |
| 2819 | xmlXPathObjectPtr arg1, arg2; |
| 2820 | int ret = 0; |
| 2821 | |
| 2822 | arg1 = valuePop(ctxt); |
| 2823 | if (arg1 == NULL) |
| 2824 | XP_ERROR0(XPATH_INVALID_OPERAND); |
| 2825 | |
| 2826 | arg2 = valuePop(ctxt); |
| 2827 | if (arg2 == NULL) { |
| 2828 | xmlXPathFreeObject(arg1); |
| 2829 | XP_ERROR0(XPATH_INVALID_OPERAND); |
| 2830 | } |
| 2831 | |
| 2832 | if (arg1 == arg2) { |
| 2833 | #ifdef DEBUG_EXPR |
| 2834 | xmlGenericError(xmlGenericErrorContext, |
| 2835 | "Equal: by pointer\n"); |
| 2836 | #endif |
| 2837 | return(1); |
| 2838 | } |
| 2839 | |
| 2840 | switch (arg1->type) { |
| 2841 | case XPATH_UNDEFINED: |
| 2842 | #ifdef DEBUG_EXPR |
| 2843 | xmlGenericError(xmlGenericErrorContext, |
| 2844 | "Equal: undefined\n"); |
| 2845 | #endif |
| 2846 | break; |
| 2847 | case XPATH_XSLT_TREE: |
| 2848 | case XPATH_NODESET: |
| 2849 | switch (arg2->type) { |
| 2850 | case XPATH_UNDEFINED: |
| 2851 | #ifdef DEBUG_EXPR |
| 2852 | xmlGenericError(xmlGenericErrorContext, |
| 2853 | "Equal: undefined\n"); |
| 2854 | #endif |
| 2855 | break; |
| 2856 | case XPATH_XSLT_TREE: |
| 2857 | case XPATH_NODESET: |
| 2858 | ret = xmlXPathEqualNodeSets(arg1, arg2); |
| 2859 | break; |
| 2860 | case XPATH_BOOLEAN: |
| 2861 | if ((arg1->nodesetval == NULL) || |
| 2862 | (arg1->nodesetval->nodeNr == 0)) ret = 0; |
| 2863 | else |
| 2864 | ret = 1; |
| 2865 | ret = (ret == arg2->boolval); |
| 2866 | break; |
| 2867 | case XPATH_NUMBER: |
| 2868 | ret = xmlXPathEqualNodeSetFloat(arg1, arg2->floatval); |
| 2869 | break; |
| 2870 | case XPATH_STRING: |
| 2871 | ret = xmlXPathEqualNodeSetString(arg1, arg2->stringval); |
| 2872 | break; |
| 2873 | case XPATH_USERS: |
| 2874 | case XPATH_POINT: |
| 2875 | case XPATH_RANGE: |
| 2876 | case XPATH_LOCATIONSET: |
| 2877 | TODO |
| 2878 | break; |
| 2879 | } |
| 2880 | break; |
| 2881 | case XPATH_BOOLEAN: |
| 2882 | switch (arg2->type) { |
| 2883 | case XPATH_UNDEFINED: |
| 2884 | #ifdef DEBUG_EXPR |
| 2885 | xmlGenericError(xmlGenericErrorContext, |
| 2886 | "Equal: undefined\n"); |
| 2887 | #endif |
| 2888 | break; |
| 2889 | case XPATH_NODESET: |
| 2890 | case XPATH_XSLT_TREE: |
| 2891 | if ((arg2->nodesetval == NULL) || |
| 2892 | (arg2->nodesetval->nodeNr == 0)) ret = 0; |
| 2893 | else |
| 2894 | ret = 1; |
| 2895 | break; |
| 2896 | case XPATH_BOOLEAN: |
| 2897 | #ifdef DEBUG_EXPR |
| 2898 | xmlGenericError(xmlGenericErrorContext, |
| 2899 | "Equal: %d boolean %d \n", |
| 2900 | arg1->boolval, arg2->boolval); |
| 2901 | #endif |
| 2902 | ret = (arg1->boolval == arg2->boolval); |
| 2903 | break; |
| 2904 | case XPATH_NUMBER: |
| 2905 | if (arg2->floatval) ret = 1; |
| 2906 | else ret = 0; |
| 2907 | ret = (arg1->boolval == ret); |
| 2908 | break; |
| 2909 | case XPATH_STRING: |
| 2910 | if ((arg2->stringval == NULL) || |
| 2911 | (arg2->stringval[0] == 0)) ret = 0; |
| 2912 | else |
| 2913 | ret = 1; |
| 2914 | ret = (arg1->boolval == ret); |
| 2915 | break; |
| 2916 | case XPATH_USERS: |
| 2917 | case XPATH_POINT: |
| 2918 | case XPATH_RANGE: |
| 2919 | case XPATH_LOCATIONSET: |
| 2920 | TODO |
| 2921 | break; |
| 2922 | } |
| 2923 | break; |
| 2924 | case XPATH_NUMBER: |
| 2925 | switch (arg2->type) { |
| 2926 | case XPATH_UNDEFINED: |
| 2927 | #ifdef DEBUG_EXPR |
| 2928 | xmlGenericError(xmlGenericErrorContext, |
| 2929 | "Equal: undefined\n"); |
| 2930 | #endif |
| 2931 | break; |
| 2932 | case XPATH_NODESET: |
| 2933 | case XPATH_XSLT_TREE: |
| 2934 | ret = xmlXPathEqualNodeSetFloat(arg2, arg1->floatval); |
| 2935 | break; |
| 2936 | case XPATH_BOOLEAN: |
| 2937 | if (arg1->floatval) ret = 1; |
| 2938 | else ret = 0; |
| 2939 | ret = (arg2->boolval == ret); |
| 2940 | break; |
| 2941 | case XPATH_STRING: |
| 2942 | valuePush(ctxt, arg2); |
| 2943 | xmlXPathNumberFunction(ctxt, 1); |
| 2944 | arg2 = valuePop(ctxt); |
| 2945 | /* no break on purpose */ |
| 2946 | case XPATH_NUMBER: |
| 2947 | ret = (arg1->floatval == arg2->floatval); |
| 2948 | break; |
| 2949 | case XPATH_USERS: |
| 2950 | case XPATH_POINT: |
| 2951 | case XPATH_RANGE: |
| 2952 | case XPATH_LOCATIONSET: |
| 2953 | TODO |
| 2954 | break; |
| 2955 | } |
| 2956 | break; |
| 2957 | case XPATH_STRING: |
| 2958 | switch (arg2->type) { |
| 2959 | case XPATH_UNDEFINED: |
| 2960 | #ifdef DEBUG_EXPR |
| 2961 | xmlGenericError(xmlGenericErrorContext, |
| 2962 | "Equal: undefined\n"); |
| 2963 | #endif |
| 2964 | break; |
| 2965 | case XPATH_NODESET: |
| 2966 | case XPATH_XSLT_TREE: |
| 2967 | ret = xmlXPathEqualNodeSetString(arg2, arg1->stringval); |
| 2968 | break; |
| 2969 | case XPATH_BOOLEAN: |
| 2970 | if ((arg1->stringval == NULL) || |
| 2971 | (arg1->stringval[0] == 0)) ret = 0; |
| 2972 | else |
| 2973 | ret = 1; |
| 2974 | ret = (arg2->boolval == ret); |
| 2975 | break; |
| 2976 | case XPATH_STRING: |
| 2977 | ret = xmlStrEqual(arg1->stringval, arg2->stringval); |
| 2978 | break; |
| 2979 | case XPATH_NUMBER: |
| 2980 | valuePush(ctxt, arg1); |
| 2981 | xmlXPathNumberFunction(ctxt, 1); |
| 2982 | arg1 = valuePop(ctxt); |
| 2983 | ret = (arg1->floatval == arg2->floatval); |
| 2984 | break; |
| 2985 | case XPATH_USERS: |
| 2986 | case XPATH_POINT: |
| 2987 | case XPATH_RANGE: |
| 2988 | case XPATH_LOCATIONSET: |
| 2989 | TODO |
| 2990 | break; |
| 2991 | } |
| 2992 | break; |
| 2993 | case XPATH_USERS: |
| 2994 | case XPATH_POINT: |
| 2995 | case XPATH_RANGE: |
| 2996 | case XPATH_LOCATIONSET: |
| 2997 | TODO |
| 2998 | break; |
| 2999 | } |
| 3000 | xmlXPathFreeObject(arg1); |
| 3001 | xmlXPathFreeObject(arg2); |
| 3002 | return(ret); |
| 3003 | } |
| 3004 | |
| 3005 | |
| 3006 | /** |
| 3007 | * xmlXPathCompareValues: |
| 3008 | * @ctxt: the XPath Parser context |
| 3009 | * @inf: less than (1) or greater than (0) |
| 3010 | * @strict: is the comparison strict |
| 3011 | * |
| 3012 | * Implement the compare operation on XPath objects: |
| 3013 | * @arg1 < @arg2 (1, 1, ... |
| 3014 | * @arg1 <= @arg2 (1, 0, ... |
| 3015 | * @arg1 > @arg2 (0, 1, ... |
| 3016 | * @arg1 >= @arg2 (0, 0, ... |
| 3017 | * |
| 3018 | * When neither object to be compared is a node-set and the operator is |
| 3019 | * <=, <, >=, >, then the objects are compared by converted both objects |
| 3020 | * to numbers and comparing the numbers according to IEEE 754. The < |
| 3021 | * comparison will be true if and only if the first number is less than the |
| 3022 | * second number. The <= comparison will be true if and only if the first |
| 3023 | * number is less than or equal to the second number. The > comparison |
| 3024 | * will be true if and only if the first number is greater than the second |
| 3025 | * number. The >= comparison will be true if and only if the first number |
| 3026 | * is greater than or equal to the second number. |
| 3027 | * |
| 3028 | * Returns 1 if the comparaison succeeded, 0 if it failed |
| 3029 | */ |
| 3030 | int |
| 3031 | xmlXPathCompareValues(xmlXPathParserContextPtr ctxt, int inf, int strict) { |
| 3032 | int ret = 0; |
| 3033 | xmlXPathObjectPtr arg1, arg2; |
| 3034 | |
| 3035 | arg2 = valuePop(ctxt); |
| 3036 | if (arg2 == NULL) { |
| 3037 | XP_ERROR0(XPATH_INVALID_OPERAND); |
| 3038 | } |
| 3039 | |
| 3040 | arg1 = valuePop(ctxt); |
| 3041 | if (arg1 == NULL) { |
| 3042 | xmlXPathFreeObject(arg2); |
| 3043 | XP_ERROR0(XPATH_INVALID_OPERAND); |
| 3044 | } |
| 3045 | |
| 3046 | if ((arg2->type == XPATH_NODESET) || (arg1->type == XPATH_NODESET)) { |
| 3047 | if ((arg2->type == XPATH_NODESET) && (arg1->type == XPATH_NODESET)) { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 3048 | ret = xmlXPathCompareNodeSets(inf, strict, arg1, arg2); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 3049 | } else { |
| 3050 | if (arg1->type == XPATH_NODESET) { |
Daniel Veillard | 4af6b6e | 2001-03-06 08:33:38 +0000 | [diff] [blame] | 3051 | ret = xmlXPathCompareNodeSetValue(ctxt, inf, strict, |
| 3052 | arg1, arg2); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 3053 | } else { |
Daniel Veillard | 4af6b6e | 2001-03-06 08:33:38 +0000 | [diff] [blame] | 3054 | ret = xmlXPathCompareNodeSetValue(ctxt, !inf, strict, |
| 3055 | arg2, arg1); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 3056 | } |
| 3057 | } |
| 3058 | return(ret); |
| 3059 | } |
| 3060 | |
| 3061 | if (arg1->type != XPATH_NUMBER) { |
| 3062 | valuePush(ctxt, arg1); |
| 3063 | xmlXPathNumberFunction(ctxt, 1); |
| 3064 | arg1 = valuePop(ctxt); |
| 3065 | } |
| 3066 | if (arg1->type != XPATH_NUMBER) { |
| 3067 | xmlXPathFreeObject(arg1); |
| 3068 | xmlXPathFreeObject(arg2); |
| 3069 | XP_ERROR0(XPATH_INVALID_OPERAND); |
| 3070 | } |
| 3071 | if (arg2->type != XPATH_NUMBER) { |
| 3072 | valuePush(ctxt, arg2); |
| 3073 | xmlXPathNumberFunction(ctxt, 1); |
| 3074 | arg2 = valuePop(ctxt); |
| 3075 | } |
| 3076 | if (arg2->type != XPATH_NUMBER) { |
| 3077 | xmlXPathFreeObject(arg1); |
| 3078 | xmlXPathFreeObject(arg2); |
| 3079 | XP_ERROR0(XPATH_INVALID_OPERAND); |
| 3080 | } |
| 3081 | /* |
| 3082 | * Add tests for infinity and nan |
| 3083 | * => feedback on 3.4 for Inf and NaN |
| 3084 | */ |
| 3085 | if (inf && strict) |
| 3086 | ret = (arg1->floatval < arg2->floatval); |
| 3087 | else if (inf && !strict) |
| 3088 | ret = (arg1->floatval <= arg2->floatval); |
| 3089 | else if (!inf && strict) |
| 3090 | ret = (arg1->floatval > arg2->floatval); |
| 3091 | else if (!inf && !strict) |
| 3092 | ret = (arg1->floatval >= arg2->floatval); |
| 3093 | xmlXPathFreeObject(arg1); |
| 3094 | xmlXPathFreeObject(arg2); |
| 3095 | return(ret); |
| 3096 | } |
| 3097 | |
| 3098 | /** |
| 3099 | * xmlXPathValueFlipSign: |
| 3100 | * @ctxt: the XPath Parser context |
| 3101 | * |
| 3102 | * Implement the unary - operation on an XPath object |
| 3103 | * The numeric operators convert their operands to numbers as if |
| 3104 | * by calling the number function. |
| 3105 | */ |
| 3106 | void |
| 3107 | xmlXPathValueFlipSign(xmlXPathParserContextPtr ctxt) { |
| 3108 | xmlXPathObjectPtr arg; |
| 3109 | |
| 3110 | POP_FLOAT |
| 3111 | arg->floatval = -arg->floatval; |
| 3112 | valuePush(ctxt, arg); |
| 3113 | } |
| 3114 | |
| 3115 | /** |
| 3116 | * xmlXPathAddValues: |
| 3117 | * @ctxt: the XPath Parser context |
| 3118 | * |
| 3119 | * Implement the add operation on XPath objects: |
| 3120 | * The numeric operators convert their operands to numbers as if |
| 3121 | * by calling the number function. |
| 3122 | */ |
| 3123 | void |
| 3124 | xmlXPathAddValues(xmlXPathParserContextPtr ctxt) { |
| 3125 | xmlXPathObjectPtr arg; |
| 3126 | double val; |
| 3127 | |
| 3128 | POP_FLOAT |
| 3129 | val = arg->floatval; |
| 3130 | xmlXPathFreeObject(arg); |
| 3131 | |
| 3132 | POP_FLOAT |
| 3133 | arg->floatval += val; |
| 3134 | valuePush(ctxt, arg); |
| 3135 | } |
| 3136 | |
| 3137 | /** |
| 3138 | * xmlXPathSubValues: |
| 3139 | * @ctxt: the XPath Parser context |
| 3140 | * |
| 3141 | * Implement the substraction operation on XPath objects: |
| 3142 | * The numeric operators convert their operands to numbers as if |
| 3143 | * by calling the number function. |
| 3144 | */ |
| 3145 | void |
| 3146 | xmlXPathSubValues(xmlXPathParserContextPtr ctxt) { |
| 3147 | xmlXPathObjectPtr arg; |
| 3148 | double val; |
| 3149 | |
| 3150 | POP_FLOAT |
| 3151 | val = arg->floatval; |
| 3152 | xmlXPathFreeObject(arg); |
| 3153 | |
| 3154 | POP_FLOAT |
| 3155 | arg->floatval -= val; |
| 3156 | valuePush(ctxt, arg); |
| 3157 | } |
| 3158 | |
| 3159 | /** |
| 3160 | * xmlXPathMultValues: |
| 3161 | * @ctxt: the XPath Parser context |
| 3162 | * |
| 3163 | * Implement the multiply operation on XPath objects: |
| 3164 | * The numeric operators convert their operands to numbers as if |
| 3165 | * by calling the number function. |
| 3166 | */ |
| 3167 | void |
| 3168 | xmlXPathMultValues(xmlXPathParserContextPtr ctxt) { |
| 3169 | xmlXPathObjectPtr arg; |
| 3170 | double val; |
| 3171 | |
| 3172 | POP_FLOAT |
| 3173 | val = arg->floatval; |
| 3174 | xmlXPathFreeObject(arg); |
| 3175 | |
| 3176 | POP_FLOAT |
| 3177 | arg->floatval *= val; |
| 3178 | valuePush(ctxt, arg); |
| 3179 | } |
| 3180 | |
| 3181 | /** |
| 3182 | * xmlXPathDivValues: |
| 3183 | * @ctxt: the XPath Parser context |
| 3184 | * |
| 3185 | * Implement the div operation on XPath objects @arg1 / @arg2: |
| 3186 | * The numeric operators convert their operands to numbers as if |
| 3187 | * by calling the number function. |
| 3188 | */ |
| 3189 | void |
| 3190 | xmlXPathDivValues(xmlXPathParserContextPtr ctxt) { |
| 3191 | xmlXPathObjectPtr arg; |
| 3192 | double val; |
| 3193 | |
| 3194 | POP_FLOAT |
| 3195 | val = arg->floatval; |
| 3196 | xmlXPathFreeObject(arg); |
| 3197 | |
| 3198 | POP_FLOAT |
| 3199 | arg->floatval /= val; |
| 3200 | valuePush(ctxt, arg); |
| 3201 | } |
| 3202 | |
| 3203 | /** |
| 3204 | * xmlXPathModValues: |
| 3205 | * @ctxt: the XPath Parser context |
| 3206 | * |
| 3207 | * Implement the mod operation on XPath objects: @arg1 / @arg2 |
| 3208 | * The numeric operators convert their operands to numbers as if |
| 3209 | * by calling the number function. |
| 3210 | */ |
| 3211 | void |
| 3212 | xmlXPathModValues(xmlXPathParserContextPtr ctxt) { |
| 3213 | xmlXPathObjectPtr arg; |
| 3214 | int arg1, arg2; |
| 3215 | |
| 3216 | POP_FLOAT |
| 3217 | arg2 = (int) arg->floatval; |
| 3218 | xmlXPathFreeObject(arg); |
| 3219 | |
| 3220 | POP_FLOAT |
| 3221 | arg1 = (int) arg->floatval; |
| 3222 | arg->floatval = arg1 % arg2; |
| 3223 | valuePush(ctxt, arg); |
| 3224 | } |
| 3225 | |
| 3226 | /************************************************************************ |
| 3227 | * * |
| 3228 | * The traversal functions * |
| 3229 | * * |
| 3230 | ************************************************************************/ |
| 3231 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 3232 | /* |
| 3233 | * A traversal function enumerates nodes along an axis. |
| 3234 | * Initially it must be called with NULL, and it indicates |
| 3235 | * termination on the axis by returning NULL. |
| 3236 | */ |
| 3237 | typedef xmlNodePtr (*xmlXPathTraversalFunction) |
| 3238 | (xmlXPathParserContextPtr ctxt, xmlNodePtr cur); |
| 3239 | |
| 3240 | /** |
| 3241 | * xmlXPathNextSelf: |
| 3242 | * @ctxt: the XPath Parser context |
| 3243 | * @cur: the current node in the traversal |
| 3244 | * |
| 3245 | * Traversal function for the "self" direction |
| 3246 | * The self axis contains just the context node itself |
| 3247 | * |
| 3248 | * Returns the next element following that axis |
| 3249 | */ |
| 3250 | xmlNodePtr |
| 3251 | xmlXPathNextSelf(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { |
| 3252 | if (cur == NULL) |
| 3253 | return(ctxt->context->node); |
| 3254 | return(NULL); |
| 3255 | } |
| 3256 | |
| 3257 | /** |
| 3258 | * xmlXPathNextChild: |
| 3259 | * @ctxt: the XPath Parser context |
| 3260 | * @cur: the current node in the traversal |
| 3261 | * |
| 3262 | * Traversal function for the "child" direction |
| 3263 | * The child axis contains the children of the context node in document order. |
| 3264 | * |
| 3265 | * Returns the next element following that axis |
| 3266 | */ |
| 3267 | xmlNodePtr |
| 3268 | xmlXPathNextChild(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { |
| 3269 | if (cur == NULL) { |
| 3270 | if (ctxt->context->node == NULL) return(NULL); |
| 3271 | switch (ctxt->context->node->type) { |
| 3272 | case XML_ELEMENT_NODE: |
| 3273 | case XML_TEXT_NODE: |
| 3274 | case XML_CDATA_SECTION_NODE: |
| 3275 | case XML_ENTITY_REF_NODE: |
| 3276 | case XML_ENTITY_NODE: |
| 3277 | case XML_PI_NODE: |
| 3278 | case XML_COMMENT_NODE: |
| 3279 | case XML_NOTATION_NODE: |
| 3280 | case XML_DTD_NODE: |
| 3281 | return(ctxt->context->node->children); |
| 3282 | case XML_DOCUMENT_NODE: |
| 3283 | case XML_DOCUMENT_TYPE_NODE: |
| 3284 | case XML_DOCUMENT_FRAG_NODE: |
| 3285 | case XML_HTML_DOCUMENT_NODE: |
| 3286 | #ifdef LIBXML_SGML_ENABLED |
| 3287 | case XML_SGML_DOCUMENT_NODE: |
| 3288 | #endif |
| 3289 | return(((xmlDocPtr) ctxt->context->node)->children); |
| 3290 | case XML_ELEMENT_DECL: |
| 3291 | case XML_ATTRIBUTE_DECL: |
| 3292 | case XML_ENTITY_DECL: |
| 3293 | case XML_ATTRIBUTE_NODE: |
| 3294 | case XML_NAMESPACE_DECL: |
| 3295 | case XML_XINCLUDE_START: |
| 3296 | case XML_XINCLUDE_END: |
| 3297 | return(NULL); |
| 3298 | } |
| 3299 | return(NULL); |
| 3300 | } |
| 3301 | if ((cur->type == XML_DOCUMENT_NODE) || |
| 3302 | (cur->type == XML_HTML_DOCUMENT_NODE)) |
| 3303 | return(NULL); |
| 3304 | return(cur->next); |
| 3305 | } |
| 3306 | |
| 3307 | /** |
| 3308 | * xmlXPathNextDescendant: |
| 3309 | * @ctxt: the XPath Parser context |
| 3310 | * @cur: the current node in the traversal |
| 3311 | * |
| 3312 | * Traversal function for the "descendant" direction |
| 3313 | * the descendant axis contains the descendants of the context node in document |
| 3314 | * order; a descendant is a child or a child of a child and so on. |
| 3315 | * |
| 3316 | * Returns the next element following that axis |
| 3317 | */ |
| 3318 | xmlNodePtr |
| 3319 | xmlXPathNextDescendant(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { |
| 3320 | if (cur == NULL) { |
| 3321 | if (ctxt->context->node == NULL) |
| 3322 | return(NULL); |
| 3323 | if ((ctxt->context->node->type == XML_ATTRIBUTE_NODE) || |
| 3324 | (ctxt->context->node->type == XML_NAMESPACE_DECL)) |
| 3325 | return(NULL); |
| 3326 | |
| 3327 | if (ctxt->context->node == (xmlNodePtr) ctxt->context->doc) |
| 3328 | return(ctxt->context->doc->children); |
| 3329 | return(ctxt->context->node->children); |
| 3330 | } |
| 3331 | |
| 3332 | if (cur->children != NULL) |
| 3333 | { |
| 3334 | if (cur->children->type != XML_ENTITY_DECL) |
| 3335 | return(cur->children); |
| 3336 | } |
| 3337 | if (cur->next != NULL) return(cur->next); |
| 3338 | |
| 3339 | do { |
| 3340 | cur = cur->parent; |
| 3341 | if (cur == NULL) return(NULL); |
| 3342 | if (cur == ctxt->context->node) return(NULL); |
| 3343 | if (cur->next != NULL) { |
| 3344 | cur = cur->next; |
| 3345 | return(cur); |
| 3346 | } |
| 3347 | } while (cur != NULL); |
| 3348 | return(cur); |
| 3349 | } |
| 3350 | |
| 3351 | /** |
| 3352 | * xmlXPathNextDescendantOrSelf: |
| 3353 | * @ctxt: the XPath Parser context |
| 3354 | * @cur: the current node in the traversal |
| 3355 | * |
| 3356 | * Traversal function for the "descendant-or-self" direction |
| 3357 | * the descendant-or-self axis contains the context node and the descendants |
| 3358 | * of the context node in document order; thus the context node is the first |
| 3359 | * node on the axis, and the first child of the context node is the second node |
| 3360 | * on the axis |
| 3361 | * |
| 3362 | * Returns the next element following that axis |
| 3363 | */ |
| 3364 | xmlNodePtr |
| 3365 | xmlXPathNextDescendantOrSelf(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { |
| 3366 | if (cur == NULL) { |
| 3367 | if (ctxt->context->node == NULL) |
| 3368 | return(NULL); |
| 3369 | if ((ctxt->context->node->type == XML_ATTRIBUTE_NODE) || |
| 3370 | (ctxt->context->node->type == XML_NAMESPACE_DECL)) |
| 3371 | return(NULL); |
| 3372 | return(ctxt->context->node); |
| 3373 | } |
| 3374 | |
| 3375 | return(xmlXPathNextDescendant(ctxt, cur)); |
| 3376 | } |
| 3377 | |
| 3378 | /** |
| 3379 | * xmlXPathNextParent: |
| 3380 | * @ctxt: the XPath Parser context |
| 3381 | * @cur: the current node in the traversal |
| 3382 | * |
| 3383 | * Traversal function for the "parent" direction |
| 3384 | * The parent axis contains the parent of the context node, if there is one. |
| 3385 | * |
| 3386 | * Returns the next element following that axis |
| 3387 | */ |
| 3388 | xmlNodePtr |
| 3389 | xmlXPathNextParent(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { |
| 3390 | /* |
| 3391 | * the parent of an attribute or namespace node is the element |
| 3392 | * to which the attribute or namespace node is attached |
| 3393 | * Namespace handling !!! |
| 3394 | */ |
| 3395 | if (cur == NULL) { |
| 3396 | if (ctxt->context->node == NULL) return(NULL); |
| 3397 | switch (ctxt->context->node->type) { |
| 3398 | case XML_ELEMENT_NODE: |
| 3399 | case XML_TEXT_NODE: |
| 3400 | case XML_CDATA_SECTION_NODE: |
| 3401 | case XML_ENTITY_REF_NODE: |
| 3402 | case XML_ENTITY_NODE: |
| 3403 | case XML_PI_NODE: |
| 3404 | case XML_COMMENT_NODE: |
| 3405 | case XML_NOTATION_NODE: |
| 3406 | case XML_DTD_NODE: |
| 3407 | case XML_ELEMENT_DECL: |
| 3408 | case XML_ATTRIBUTE_DECL: |
| 3409 | case XML_XINCLUDE_START: |
| 3410 | case XML_XINCLUDE_END: |
| 3411 | case XML_ENTITY_DECL: |
| 3412 | if (ctxt->context->node->parent == NULL) |
| 3413 | return((xmlNodePtr) ctxt->context->doc); |
| 3414 | return(ctxt->context->node->parent); |
| 3415 | case XML_ATTRIBUTE_NODE: { |
| 3416 | xmlAttrPtr att = (xmlAttrPtr) ctxt->context->node; |
| 3417 | |
| 3418 | return(att->parent); |
| 3419 | } |
| 3420 | case XML_DOCUMENT_NODE: |
| 3421 | case XML_DOCUMENT_TYPE_NODE: |
| 3422 | case XML_DOCUMENT_FRAG_NODE: |
| 3423 | case XML_HTML_DOCUMENT_NODE: |
| 3424 | #ifdef LIBXML_SGML_ENABLED |
| 3425 | case XML_SGML_DOCUMENT_NODE: |
| 3426 | #endif |
| 3427 | return(NULL); |
| 3428 | case XML_NAMESPACE_DECL: |
| 3429 | /* |
| 3430 | * TODO !!! may require extending struct _xmlNs with |
| 3431 | * parent field |
| 3432 | * C.f. Infoset case... |
| 3433 | */ |
| 3434 | return(NULL); |
| 3435 | } |
| 3436 | } |
| 3437 | return(NULL); |
| 3438 | } |
| 3439 | |
| 3440 | /** |
| 3441 | * xmlXPathNextAncestor: |
| 3442 | * @ctxt: the XPath Parser context |
| 3443 | * @cur: the current node in the traversal |
| 3444 | * |
| 3445 | * Traversal function for the "ancestor" direction |
| 3446 | * the ancestor axis contains the ancestors of the context node; the ancestors |
| 3447 | * of the context node consist of the parent of context node and the parent's |
| 3448 | * parent and so on; the nodes are ordered in reverse document order; thus the |
| 3449 | * parent is the first node on the axis, and the parent's parent is the second |
| 3450 | * node on the axis |
| 3451 | * |
| 3452 | * Returns the next element following that axis |
| 3453 | */ |
| 3454 | xmlNodePtr |
| 3455 | xmlXPathNextAncestor(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { |
| 3456 | /* |
| 3457 | * the parent of an attribute or namespace node is the element |
| 3458 | * to which the attribute or namespace node is attached |
| 3459 | * !!!!!!!!!!!!! |
| 3460 | */ |
| 3461 | if (cur == NULL) { |
| 3462 | if (ctxt->context->node == NULL) return(NULL); |
| 3463 | switch (ctxt->context->node->type) { |
| 3464 | case XML_ELEMENT_NODE: |
| 3465 | case XML_TEXT_NODE: |
| 3466 | case XML_CDATA_SECTION_NODE: |
| 3467 | case XML_ENTITY_REF_NODE: |
| 3468 | case XML_ENTITY_NODE: |
| 3469 | case XML_PI_NODE: |
| 3470 | case XML_COMMENT_NODE: |
| 3471 | case XML_DTD_NODE: |
| 3472 | case XML_ELEMENT_DECL: |
| 3473 | case XML_ATTRIBUTE_DECL: |
| 3474 | case XML_ENTITY_DECL: |
| 3475 | case XML_NOTATION_NODE: |
| 3476 | case XML_XINCLUDE_START: |
| 3477 | case XML_XINCLUDE_END: |
| 3478 | if (ctxt->context->node->parent == NULL) |
| 3479 | return((xmlNodePtr) ctxt->context->doc); |
| 3480 | return(ctxt->context->node->parent); |
| 3481 | case XML_ATTRIBUTE_NODE: { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 3482 | xmlAttrPtr tmp = (xmlAttrPtr) ctxt->context->node; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 3483 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 3484 | return(tmp->parent); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 3485 | } |
| 3486 | case XML_DOCUMENT_NODE: |
| 3487 | case XML_DOCUMENT_TYPE_NODE: |
| 3488 | case XML_DOCUMENT_FRAG_NODE: |
| 3489 | case XML_HTML_DOCUMENT_NODE: |
| 3490 | #ifdef LIBXML_SGML_ENABLED |
| 3491 | case XML_SGML_DOCUMENT_NODE: |
| 3492 | #endif |
| 3493 | return(NULL); |
| 3494 | case XML_NAMESPACE_DECL: |
| 3495 | /* |
| 3496 | * TODO !!! may require extending struct _xmlNs with |
| 3497 | * parent field |
| 3498 | * C.f. Infoset case... |
| 3499 | */ |
| 3500 | return(NULL); |
| 3501 | } |
| 3502 | return(NULL); |
| 3503 | } |
| 3504 | if (cur == ctxt->context->doc->children) |
| 3505 | return((xmlNodePtr) ctxt->context->doc); |
| 3506 | if (cur == (xmlNodePtr) ctxt->context->doc) |
| 3507 | return(NULL); |
| 3508 | switch (cur->type) { |
| 3509 | case XML_ELEMENT_NODE: |
| 3510 | case XML_TEXT_NODE: |
| 3511 | case XML_CDATA_SECTION_NODE: |
| 3512 | case XML_ENTITY_REF_NODE: |
| 3513 | case XML_ENTITY_NODE: |
| 3514 | case XML_PI_NODE: |
| 3515 | case XML_COMMENT_NODE: |
| 3516 | case XML_NOTATION_NODE: |
| 3517 | case XML_DTD_NODE: |
| 3518 | case XML_ELEMENT_DECL: |
| 3519 | case XML_ATTRIBUTE_DECL: |
| 3520 | case XML_ENTITY_DECL: |
| 3521 | case XML_XINCLUDE_START: |
| 3522 | case XML_XINCLUDE_END: |
| 3523 | return(cur->parent); |
| 3524 | case XML_ATTRIBUTE_NODE: { |
| 3525 | xmlAttrPtr att = (xmlAttrPtr) ctxt->context->node; |
| 3526 | |
| 3527 | return(att->parent); |
| 3528 | } |
| 3529 | case XML_DOCUMENT_NODE: |
| 3530 | case XML_DOCUMENT_TYPE_NODE: |
| 3531 | case XML_DOCUMENT_FRAG_NODE: |
| 3532 | case XML_HTML_DOCUMENT_NODE: |
| 3533 | #ifdef LIBXML_SGML_ENABLED |
| 3534 | case XML_SGML_DOCUMENT_NODE: |
| 3535 | #endif |
| 3536 | return(NULL); |
| 3537 | case XML_NAMESPACE_DECL: |
| 3538 | /* |
| 3539 | * TODO !!! may require extending struct _xmlNs with |
| 3540 | * parent field |
| 3541 | * C.f. Infoset case... |
| 3542 | */ |
| 3543 | return(NULL); |
| 3544 | } |
| 3545 | return(NULL); |
| 3546 | } |
| 3547 | |
| 3548 | /** |
| 3549 | * xmlXPathNextAncestorOrSelf: |
| 3550 | * @ctxt: the XPath Parser context |
| 3551 | * @cur: the current node in the traversal |
| 3552 | * |
| 3553 | * Traversal function for the "ancestor-or-self" direction |
| 3554 | * he ancestor-or-self axis contains the context node and ancestors of |
| 3555 | * the context node in reverse document order; thus the context node is |
| 3556 | * the first node on the axis, and the context node's parent the second; |
| 3557 | * parent here is defined the same as with the parent axis. |
| 3558 | * |
| 3559 | * Returns the next element following that axis |
| 3560 | */ |
| 3561 | xmlNodePtr |
| 3562 | xmlXPathNextAncestorOrSelf(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { |
| 3563 | if (cur == NULL) |
| 3564 | return(ctxt->context->node); |
| 3565 | return(xmlXPathNextAncestor(ctxt, cur)); |
| 3566 | } |
| 3567 | |
| 3568 | /** |
| 3569 | * xmlXPathNextFollowingSibling: |
| 3570 | * @ctxt: the XPath Parser context |
| 3571 | * @cur: the current node in the traversal |
| 3572 | * |
| 3573 | * Traversal function for the "following-sibling" direction |
| 3574 | * The following-sibling axis contains the following siblings of the context |
| 3575 | * node in document order. |
| 3576 | * |
| 3577 | * Returns the next element following that axis |
| 3578 | */ |
| 3579 | xmlNodePtr |
| 3580 | xmlXPathNextFollowingSibling(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { |
| 3581 | if ((ctxt->context->node->type == XML_ATTRIBUTE_NODE) || |
| 3582 | (ctxt->context->node->type == XML_NAMESPACE_DECL)) |
| 3583 | return(NULL); |
| 3584 | if (cur == (xmlNodePtr) ctxt->context->doc) |
| 3585 | return(NULL); |
| 3586 | if (cur == NULL) |
| 3587 | return(ctxt->context->node->next); |
| 3588 | return(cur->next); |
| 3589 | } |
| 3590 | |
| 3591 | /** |
| 3592 | * xmlXPathNextPrecedingSibling: |
| 3593 | * @ctxt: the XPath Parser context |
| 3594 | * @cur: the current node in the traversal |
| 3595 | * |
| 3596 | * Traversal function for the "preceding-sibling" direction |
| 3597 | * The preceding-sibling axis contains the preceding siblings of the context |
| 3598 | * node in reverse document order; the first preceding sibling is first on the |
| 3599 | * axis; the sibling preceding that node is the second on the axis and so on. |
| 3600 | * |
| 3601 | * Returns the next element following that axis |
| 3602 | */ |
| 3603 | xmlNodePtr |
| 3604 | xmlXPathNextPrecedingSibling(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { |
| 3605 | if ((ctxt->context->node->type == XML_ATTRIBUTE_NODE) || |
| 3606 | (ctxt->context->node->type == XML_NAMESPACE_DECL)) |
| 3607 | return(NULL); |
| 3608 | if (cur == (xmlNodePtr) ctxt->context->doc) |
| 3609 | return(NULL); |
| 3610 | if (cur == NULL) |
| 3611 | return(ctxt->context->node->prev); |
| 3612 | return(cur->prev); |
| 3613 | } |
| 3614 | |
| 3615 | /** |
| 3616 | * xmlXPathNextFollowing: |
| 3617 | * @ctxt: the XPath Parser context |
| 3618 | * @cur: the current node in the traversal |
| 3619 | * |
| 3620 | * Traversal function for the "following" direction |
| 3621 | * The following axis contains all nodes in the same document as the context |
| 3622 | * node that are after the context node in document order, excluding any |
| 3623 | * descendants and excluding attribute nodes and namespace nodes; the nodes |
| 3624 | * are ordered in document order |
| 3625 | * |
| 3626 | * Returns the next element following that axis |
| 3627 | */ |
| 3628 | xmlNodePtr |
| 3629 | xmlXPathNextFollowing(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { |
| 3630 | if (cur != NULL && cur->children != NULL) |
| 3631 | return cur->children ; |
| 3632 | if (cur == NULL) cur = ctxt->context->node; |
| 3633 | if (cur == NULL) return(NULL) ; /* ERROR */ |
| 3634 | if (cur->next != NULL) return(cur->next) ; |
| 3635 | do { |
| 3636 | cur = cur->parent; |
| 3637 | if (cur == NULL) return(NULL); |
| 3638 | if (cur == (xmlNodePtr) ctxt->context->doc) return(NULL); |
| 3639 | if (cur->next != NULL) return(cur->next); |
| 3640 | } while (cur != NULL); |
| 3641 | return(cur); |
| 3642 | } |
| 3643 | |
| 3644 | /* |
| 3645 | * xmlXPathIsAncestor: |
| 3646 | * @ancestor: the ancestor node |
| 3647 | * @node: the current node |
| 3648 | * |
| 3649 | * Check that @ancestor is a @node's ancestor |
| 3650 | * |
| 3651 | * returns 1 if @ancestor is a @node's ancestor, 0 otherwise. |
| 3652 | */ |
| 3653 | static int |
| 3654 | xmlXPathIsAncestor(xmlNodePtr ancestor, xmlNodePtr node) { |
| 3655 | if ((ancestor == NULL) || (node == NULL)) return(0); |
| 3656 | /* nodes need to be in the same document */ |
| 3657 | if (ancestor->doc != node->doc) return(0); |
| 3658 | /* avoid searching if ancestor or node is the root node */ |
| 3659 | if (ancestor == (xmlNodePtr) node->doc) return(1); |
| 3660 | if (node == (xmlNodePtr) ancestor->doc) return(0); |
| 3661 | while (node->parent != NULL) { |
| 3662 | if (node->parent == ancestor) |
| 3663 | return(1); |
| 3664 | node = node->parent; |
| 3665 | } |
| 3666 | return(0); |
| 3667 | } |
| 3668 | |
| 3669 | /** |
| 3670 | * xmlXPathNextPreceding: |
| 3671 | * @ctxt: the XPath Parser context |
| 3672 | * @cur: the current node in the traversal |
| 3673 | * |
| 3674 | * Traversal function for the "preceding" direction |
| 3675 | * the preceding axis contains all nodes in the same document as the context |
| 3676 | * node that are before the context node in document order, excluding any |
| 3677 | * ancestors and excluding attribute nodes and namespace nodes; the nodes are |
| 3678 | * ordered in reverse document order |
| 3679 | * |
| 3680 | * Returns the next element following that axis |
| 3681 | */ |
| 3682 | xmlNodePtr |
| 3683 | xmlXPathNextPreceding(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { |
| 3684 | if (cur == NULL) |
| 3685 | cur = ctxt->context->node ; |
| 3686 | do { |
| 3687 | if (cur->prev != NULL) { |
| 3688 | for (cur = cur->prev ; cur->last != NULL ; cur = cur->last) |
| 3689 | ; |
| 3690 | return(cur) ; |
| 3691 | } |
| 3692 | |
| 3693 | cur = cur->parent; |
| 3694 | if (cur == NULL) return(NULL); |
| 3695 | if (cur == ctxt->context->doc->children) return(NULL); |
| 3696 | } while (xmlXPathIsAncestor(cur, ctxt->context->node)); |
| 3697 | return(cur); |
| 3698 | } |
| 3699 | |
| 3700 | /** |
| 3701 | * xmlXPathNextNamespace: |
| 3702 | * @ctxt: the XPath Parser context |
| 3703 | * @cur: the current attribute in the traversal |
| 3704 | * |
| 3705 | * Traversal function for the "namespace" direction |
| 3706 | * the namespace axis contains the namespace nodes of the context node; |
| 3707 | * the order of nodes on this axis is implementation-defined; the axis will |
| 3708 | * be empty unless the context node is an element |
| 3709 | * |
| 3710 | * Returns the next element following that axis |
| 3711 | */ |
| 3712 | xmlNodePtr |
| 3713 | xmlXPathNextNamespace(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { |
| 3714 | if (ctxt->context->node->type != XML_ELEMENT_NODE) return(NULL); |
| 3715 | if ((cur == NULL) || (ctxt->context->namespaces == NULL)) { |
| 3716 | if (ctxt->context->namespaces != NULL) |
| 3717 | xmlFree(ctxt->context->namespaces); |
| 3718 | ctxt->context->namespaces = |
| 3719 | xmlGetNsList(ctxt->context->doc, ctxt->context->node); |
| 3720 | if (ctxt->context->namespaces == NULL) return(NULL); |
| 3721 | ctxt->context->nsNr = 0; |
| 3722 | } |
| 3723 | return((xmlNodePtr)ctxt->context->namespaces[ctxt->context->nsNr++]); |
| 3724 | } |
| 3725 | |
| 3726 | /** |
| 3727 | * xmlXPathNextAttribute: |
| 3728 | * @ctxt: the XPath Parser context |
| 3729 | * @cur: the current attribute in the traversal |
| 3730 | * |
| 3731 | * Traversal function for the "attribute" direction |
| 3732 | * TODO: support DTD inherited default attributes |
| 3733 | * |
| 3734 | * Returns the next element following that axis |
| 3735 | */ |
| 3736 | xmlNodePtr |
| 3737 | xmlXPathNextAttribute(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { |
| 3738 | if (ctxt->context->node->type != XML_ELEMENT_NODE) return(NULL); |
| 3739 | if (cur == NULL) { |
| 3740 | if (ctxt->context->node == (xmlNodePtr) ctxt->context->doc) |
| 3741 | return(NULL); |
| 3742 | return((xmlNodePtr)ctxt->context->node->properties); |
| 3743 | } |
| 3744 | return((xmlNodePtr)cur->next); |
| 3745 | } |
| 3746 | |
| 3747 | /************************************************************************ |
| 3748 | * * |
| 3749 | * NodeTest Functions * |
| 3750 | * * |
| 3751 | ************************************************************************/ |
| 3752 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 3753 | #define IS_FUNCTION 200 |
| 3754 | |
| 3755 | /** |
| 3756 | * xmlXPathNodeCollectAndTest: |
| 3757 | * @ctxt: the XPath Parser context |
| 3758 | * @axis: the XPath axis |
| 3759 | * @test: the XPath test |
| 3760 | * @type: the XPath type |
| 3761 | * @prefix: the namesapce prefix if any |
| 3762 | * @name: the name used in the search if any |
| 3763 | * |
| 3764 | * This is the function implementing a step: based on the current list |
| 3765 | * of nodes, it builds up a new list, looking at all nodes under that |
| 3766 | * axis and selecting them. |
| 3767 | * |
| 3768 | * Returns the new NodeSet resulting from the search. |
| 3769 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 3770 | static void |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 3771 | xmlXPathNodeCollectAndTest(xmlXPathParserContextPtr ctxt, xmlXPathAxisVal axis, |
| 3772 | xmlXPathTestVal test, xmlXPathTypeVal type, |
| 3773 | const xmlChar *prefix, const xmlChar *name) { |
| 3774 | #ifdef DEBUG_STEP |
| 3775 | int n = 0, t = 0; |
| 3776 | #endif |
| 3777 | int i; |
| 3778 | xmlNodeSetPtr ret; |
| 3779 | xmlXPathTraversalFunction next = NULL; |
| 3780 | void (*addNode)(xmlNodeSetPtr, xmlNodePtr); |
| 3781 | xmlNodePtr cur = NULL; |
| 3782 | xmlXPathObjectPtr obj; |
| 3783 | xmlNodeSetPtr nodelist; |
Bjorn Reese | e1dc011 | 2001-03-03 12:09:03 +0000 | [diff] [blame] | 3784 | xmlNodePtr tmp; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 3785 | |
| 3786 | CHECK_TYPE(XPATH_NODESET); |
| 3787 | obj = valuePop(ctxt); |
| 3788 | addNode = xmlXPathNodeSetAdd; |
| 3789 | |
| 3790 | #ifdef DEBUG_STEP |
| 3791 | xmlGenericError(xmlGenericErrorContext, |
| 3792 | "new step : "); |
| 3793 | #endif |
| 3794 | switch (axis) { |
| 3795 | case AXIS_ANCESTOR: |
| 3796 | #ifdef DEBUG_STEP |
| 3797 | xmlGenericError(xmlGenericErrorContext, |
| 3798 | "axis 'ancestors' "); |
| 3799 | #endif |
| 3800 | next = xmlXPathNextAncestor; break; |
| 3801 | case AXIS_ANCESTOR_OR_SELF: |
| 3802 | #ifdef DEBUG_STEP |
| 3803 | xmlGenericError(xmlGenericErrorContext, |
| 3804 | "axis 'ancestors-or-self' "); |
| 3805 | #endif |
| 3806 | next = xmlXPathNextAncestorOrSelf; break; |
| 3807 | case AXIS_ATTRIBUTE: |
| 3808 | #ifdef DEBUG_STEP |
| 3809 | xmlGenericError(xmlGenericErrorContext, |
| 3810 | "axis 'attributes' "); |
| 3811 | #endif |
| 3812 | next = xmlXPathNextAttribute; break; |
| 3813 | break; |
| 3814 | case AXIS_CHILD: |
| 3815 | #ifdef DEBUG_STEP |
| 3816 | xmlGenericError(xmlGenericErrorContext, |
| 3817 | "axis 'child' "); |
| 3818 | #endif |
| 3819 | next = xmlXPathNextChild; break; |
| 3820 | case AXIS_DESCENDANT: |
| 3821 | #ifdef DEBUG_STEP |
| 3822 | xmlGenericError(xmlGenericErrorContext, |
| 3823 | "axis 'descendant' "); |
| 3824 | #endif |
| 3825 | next = xmlXPathNextDescendant; break; |
| 3826 | case AXIS_DESCENDANT_OR_SELF: |
| 3827 | #ifdef DEBUG_STEP |
| 3828 | xmlGenericError(xmlGenericErrorContext, |
| 3829 | "axis 'descendant-or-self' "); |
| 3830 | #endif |
| 3831 | next = xmlXPathNextDescendantOrSelf; break; |
| 3832 | case AXIS_FOLLOWING: |
| 3833 | #ifdef DEBUG_STEP |
| 3834 | xmlGenericError(xmlGenericErrorContext, |
| 3835 | "axis 'following' "); |
| 3836 | #endif |
| 3837 | next = xmlXPathNextFollowing; break; |
| 3838 | case AXIS_FOLLOWING_SIBLING: |
| 3839 | #ifdef DEBUG_STEP |
| 3840 | xmlGenericError(xmlGenericErrorContext, |
| 3841 | "axis 'following-siblings' "); |
| 3842 | #endif |
| 3843 | next = xmlXPathNextFollowingSibling; break; |
| 3844 | case AXIS_NAMESPACE: |
| 3845 | #ifdef DEBUG_STEP |
| 3846 | xmlGenericError(xmlGenericErrorContext, |
| 3847 | "axis 'namespace' "); |
| 3848 | #endif |
| 3849 | next = (xmlXPathTraversalFunction) xmlXPathNextNamespace; break; |
| 3850 | break; |
| 3851 | case AXIS_PARENT: |
| 3852 | #ifdef DEBUG_STEP |
| 3853 | xmlGenericError(xmlGenericErrorContext, |
| 3854 | "axis 'parent' "); |
| 3855 | #endif |
| 3856 | next = xmlXPathNextParent; break; |
| 3857 | case AXIS_PRECEDING: |
| 3858 | #ifdef DEBUG_STEP |
| 3859 | xmlGenericError(xmlGenericErrorContext, |
| 3860 | "axis 'preceding' "); |
| 3861 | #endif |
| 3862 | next = xmlXPathNextPreceding; break; |
| 3863 | case AXIS_PRECEDING_SIBLING: |
| 3864 | #ifdef DEBUG_STEP |
| 3865 | xmlGenericError(xmlGenericErrorContext, |
| 3866 | "axis 'preceding-sibling' "); |
| 3867 | #endif |
| 3868 | next = xmlXPathNextPrecedingSibling; break; |
| 3869 | case AXIS_SELF: |
| 3870 | #ifdef DEBUG_STEP |
| 3871 | xmlGenericError(xmlGenericErrorContext, |
| 3872 | "axis 'self' "); |
| 3873 | #endif |
| 3874 | next = xmlXPathNextSelf; break; |
| 3875 | } |
| 3876 | if (next == NULL) |
| 3877 | return; |
| 3878 | |
| 3879 | nodelist = obj->nodesetval; |
| 3880 | if ((nodelist != NULL) && |
| 3881 | (nodelist->nodeNr <= 1)) |
| 3882 | addNode = xmlXPathNodeSetAddUnique; |
| 3883 | else |
| 3884 | addNode = xmlXPathNodeSetAdd; |
| 3885 | ret = xmlXPathNodeSetCreate(NULL); |
| 3886 | #ifdef DEBUG_STEP |
| 3887 | xmlGenericError(xmlGenericErrorContext, |
| 3888 | " context contains %d nodes\n", |
| 3889 | nodelist->nodeNr); |
| 3890 | switch (test) { |
| 3891 | case NODE_TEST_NODE: |
| 3892 | xmlGenericError(xmlGenericErrorContext, |
| 3893 | " searching all nodes\n"); |
| 3894 | break; |
| 3895 | case NODE_TEST_NONE: |
| 3896 | xmlGenericError(xmlGenericErrorContext, |
| 3897 | " searching for none !!!\n"); |
| 3898 | break; |
| 3899 | case NODE_TEST_TYPE: |
| 3900 | xmlGenericError(xmlGenericErrorContext, |
| 3901 | " searching for type %d\n", type); |
| 3902 | break; |
| 3903 | case NODE_TEST_PI: |
| 3904 | xmlGenericError(xmlGenericErrorContext, |
| 3905 | " searching for PI !!!\n"); |
| 3906 | break; |
| 3907 | case NODE_TEST_ALL: |
| 3908 | xmlGenericError(xmlGenericErrorContext, |
| 3909 | " searching for *\n"); |
| 3910 | break; |
| 3911 | case NODE_TEST_NS: |
| 3912 | xmlGenericError(xmlGenericErrorContext, |
| 3913 | " searching for namespace %s\n", |
| 3914 | prefix); |
| 3915 | break; |
| 3916 | case NODE_TEST_NAME: |
| 3917 | xmlGenericError(xmlGenericErrorContext, |
| 3918 | " searching for name %s\n", name); |
| 3919 | if (prefix != NULL) |
| 3920 | xmlGenericError(xmlGenericErrorContext, |
| 3921 | " with namespace %s\n", |
| 3922 | prefix); |
| 3923 | break; |
| 3924 | } |
| 3925 | xmlGenericError(xmlGenericErrorContext, "Testing : "); |
| 3926 | #endif |
| 3927 | /* |
| 3928 | * 2.3 Node Tests |
| 3929 | * - For the attribute axis, the principal node type is attribute. |
| 3930 | * - For the namespace axis, the principal node type is namespace. |
| 3931 | * - For other axes, the principal node type is element. |
| 3932 | * |
| 3933 | * A node test * is true for any node of the |
| 3934 | * principal node type. For example, child::* willi |
| 3935 | * select all element children of the context node |
| 3936 | */ |
Bjorn Reese | e1dc011 | 2001-03-03 12:09:03 +0000 | [diff] [blame] | 3937 | tmp = ctxt->context->node; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 3938 | for (i = 0;i < nodelist->nodeNr; i++) { |
| 3939 | ctxt->context->node = nodelist->nodeTab[i]; |
| 3940 | |
| 3941 | cur = NULL; |
| 3942 | do { |
| 3943 | cur = next(ctxt, cur); |
| 3944 | if (cur == NULL) break; |
| 3945 | #ifdef DEBUG_STEP |
| 3946 | t++; |
| 3947 | xmlGenericError(xmlGenericErrorContext, " %s", cur->name); |
| 3948 | #endif |
| 3949 | switch (test) { |
| 3950 | case NODE_TEST_NONE: |
Bjorn Reese | e1dc011 | 2001-03-03 12:09:03 +0000 | [diff] [blame] | 3951 | ctxt->context->node = tmp; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 3952 | STRANGE |
| 3953 | return; |
| 3954 | case NODE_TEST_TYPE: |
| 3955 | if ((cur->type == type) || |
| 3956 | ((type == NODE_TYPE_NODE) && |
| 3957 | ((cur->type == XML_DOCUMENT_NODE) || |
| 3958 | (cur->type == XML_HTML_DOCUMENT_NODE) || |
| 3959 | (cur->type == XML_ELEMENT_NODE) || |
| 3960 | (cur->type == XML_PI_NODE) || |
| 3961 | (cur->type == XML_COMMENT_NODE) || |
| 3962 | (cur->type == XML_CDATA_SECTION_NODE) || |
| 3963 | (cur->type == XML_TEXT_NODE)))) { |
| 3964 | #ifdef DEBUG_STEP |
| 3965 | n++; |
| 3966 | #endif |
| 3967 | addNode(ret, cur); |
| 3968 | } |
| 3969 | break; |
| 3970 | case NODE_TEST_PI: |
| 3971 | if (cur->type == XML_PI_NODE) { |
| 3972 | if ((name != NULL) && |
| 3973 | (!xmlStrEqual(name, cur->name))) |
| 3974 | break; |
| 3975 | #ifdef DEBUG_STEP |
| 3976 | n++; |
| 3977 | #endif |
| 3978 | addNode(ret, cur); |
| 3979 | } |
| 3980 | break; |
| 3981 | case NODE_TEST_ALL: |
| 3982 | if (axis == AXIS_ATTRIBUTE) { |
| 3983 | if (cur->type == XML_ATTRIBUTE_NODE) { |
| 3984 | #ifdef DEBUG_STEP |
| 3985 | n++; |
| 3986 | #endif |
| 3987 | addNode(ret, cur); |
| 3988 | } |
| 3989 | } else if (axis == AXIS_NAMESPACE) { |
| 3990 | if (cur->type == XML_NAMESPACE_DECL) { |
| 3991 | #ifdef DEBUG_STEP |
| 3992 | n++; |
| 3993 | #endif |
| 3994 | addNode(ret, cur); |
| 3995 | } |
| 3996 | } else { |
| 3997 | if ((cur->type == XML_ELEMENT_NODE) || |
| 3998 | (cur->type == XML_DOCUMENT_NODE) || |
| 3999 | (cur->type == XML_HTML_DOCUMENT_NODE)) { |
| 4000 | if (prefix == NULL) { |
| 4001 | #ifdef DEBUG_STEP |
| 4002 | n++; |
| 4003 | #endif |
| 4004 | addNode(ret, cur); |
| 4005 | } else if ((cur->ns != NULL) && |
| 4006 | (xmlStrEqual(prefix, |
| 4007 | cur->ns->href))) { |
| 4008 | #ifdef DEBUG_STEP |
| 4009 | n++; |
| 4010 | #endif |
| 4011 | addNode(ret, cur); |
| 4012 | } |
| 4013 | } |
| 4014 | } |
| 4015 | break; |
| 4016 | case NODE_TEST_NS: { |
| 4017 | TODO; |
| 4018 | break; |
| 4019 | } |
| 4020 | case NODE_TEST_NAME: |
| 4021 | switch (cur->type) { |
| 4022 | case XML_ELEMENT_NODE: |
| 4023 | if (xmlStrEqual(name, cur->name)) { |
| 4024 | if (prefix == NULL) { |
| 4025 | if ((cur->ns == NULL) || |
| 4026 | (cur->ns->prefix == NULL)) { |
| 4027 | #ifdef DEBUG_STEP |
| 4028 | n++; |
| 4029 | #endif |
| 4030 | addNode(ret, cur); |
| 4031 | } |
| 4032 | } else { |
| 4033 | if ((cur->ns != NULL) && |
| 4034 | (xmlStrEqual(prefix, |
| 4035 | cur->ns->href))) { |
| 4036 | #ifdef DEBUG_STEP |
| 4037 | n++; |
| 4038 | #endif |
| 4039 | addNode(ret, cur); |
| 4040 | } |
| 4041 | } |
| 4042 | } |
| 4043 | break; |
| 4044 | case XML_ATTRIBUTE_NODE: { |
| 4045 | xmlAttrPtr attr = (xmlAttrPtr) cur; |
| 4046 | if (xmlStrEqual(name, attr->name)) { |
| 4047 | if (prefix == NULL) { |
| 4048 | if ((attr->ns == NULL) || |
| 4049 | (attr->ns->prefix == NULL)) { |
| 4050 | #ifdef DEBUG_STEP |
| 4051 | n++; |
| 4052 | #endif |
| 4053 | addNode(ret, (xmlNodePtr) attr); |
| 4054 | } |
| 4055 | } else { |
| 4056 | if ((attr->ns != NULL) && |
| 4057 | (xmlStrEqual(prefix, |
| 4058 | attr->ns->href))) { |
| 4059 | #ifdef DEBUG_STEP |
| 4060 | n++; |
| 4061 | #endif |
| 4062 | addNode(ret, (xmlNodePtr) attr); |
| 4063 | } |
| 4064 | } |
| 4065 | } |
| 4066 | break; |
| 4067 | } |
| 4068 | case XML_NAMESPACE_DECL: { |
| 4069 | TODO; |
| 4070 | break; |
| 4071 | } |
| 4072 | default: |
| 4073 | break; |
| 4074 | } |
| 4075 | break; |
| 4076 | } |
| 4077 | } while (cur != NULL); |
| 4078 | } |
Bjorn Reese | e1dc011 | 2001-03-03 12:09:03 +0000 | [diff] [blame] | 4079 | ctxt->context->node = tmp; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 4080 | #ifdef DEBUG_STEP |
| 4081 | xmlGenericError(xmlGenericErrorContext, |
| 4082 | "\nExamined %d nodes, found %d nodes at that step\n", t, n); |
| 4083 | #endif |
| 4084 | xmlXPathFreeObject(obj); |
| 4085 | valuePush(ctxt, xmlXPathWrapNodeSet(ret)); |
| 4086 | } |
| 4087 | |
| 4088 | |
| 4089 | /************************************************************************ |
| 4090 | * * |
| 4091 | * Implicit tree core function library * |
| 4092 | * * |
| 4093 | ************************************************************************/ |
| 4094 | |
| 4095 | /** |
| 4096 | * xmlXPathRoot: |
| 4097 | * @ctxt: the XPath Parser context |
| 4098 | * |
| 4099 | * Initialize the context to the root of the document |
| 4100 | */ |
| 4101 | void |
| 4102 | xmlXPathRoot(xmlXPathParserContextPtr ctxt) { |
| 4103 | ctxt->context->node = (xmlNodePtr) ctxt->context->doc; |
| 4104 | valuePush(ctxt, xmlXPathNewNodeSet(ctxt->context->node)); |
| 4105 | } |
| 4106 | |
| 4107 | /************************************************************************ |
| 4108 | * * |
| 4109 | * The explicit core function library * |
| 4110 | *http://www.w3.org/Style/XSL/Group/1999/07/xpath-19990705.html#corelib * |
| 4111 | * * |
| 4112 | ************************************************************************/ |
| 4113 | |
| 4114 | |
| 4115 | /** |
| 4116 | * xmlXPathLastFunction: |
| 4117 | * @ctxt: the XPath Parser context |
| 4118 | * @nargs: the number of arguments |
| 4119 | * |
| 4120 | * Implement the last() XPath function |
| 4121 | * number last() |
| 4122 | * The last function returns the number of nodes in the context node list. |
| 4123 | */ |
| 4124 | void |
| 4125 | xmlXPathLastFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4126 | CHECK_ARITY(0); |
| 4127 | if (ctxt->context->contextSize >= 0) { |
| 4128 | valuePush(ctxt, xmlXPathNewFloat((double) ctxt->context->contextSize)); |
| 4129 | #ifdef DEBUG_EXPR |
| 4130 | xmlGenericError(xmlGenericErrorContext, |
| 4131 | "last() : %d\n", ctxt->context->contextSize); |
| 4132 | #endif |
| 4133 | } else { |
| 4134 | XP_ERROR(XPATH_INVALID_CTXT_SIZE); |
| 4135 | } |
| 4136 | } |
| 4137 | |
| 4138 | /** |
| 4139 | * xmlXPathPositionFunction: |
| 4140 | * @ctxt: the XPath Parser context |
| 4141 | * @nargs: the number of arguments |
| 4142 | * |
| 4143 | * Implement the position() XPath function |
| 4144 | * number position() |
| 4145 | * The position function returns the position of the context node in the |
| 4146 | * context node list. The first position is 1, and so the last positionr |
| 4147 | * will be equal to last(). |
| 4148 | */ |
| 4149 | void |
| 4150 | xmlXPathPositionFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4151 | CHECK_ARITY(0); |
| 4152 | if (ctxt->context->proximityPosition >= 0) { |
| 4153 | valuePush(ctxt, |
| 4154 | xmlXPathNewFloat((double) ctxt->context->proximityPosition)); |
| 4155 | #ifdef DEBUG_EXPR |
| 4156 | xmlGenericError(xmlGenericErrorContext, "position() : %d\n", |
| 4157 | ctxt->context->proximityPosition); |
| 4158 | #endif |
| 4159 | } else { |
| 4160 | XP_ERROR(XPATH_INVALID_CTXT_POSITION); |
| 4161 | } |
| 4162 | } |
| 4163 | |
| 4164 | /** |
| 4165 | * xmlXPathCountFunction: |
| 4166 | * @ctxt: the XPath Parser context |
| 4167 | * @nargs: the number of arguments |
| 4168 | * |
| 4169 | * Implement the count() XPath function |
| 4170 | * number count(node-set) |
| 4171 | */ |
| 4172 | void |
| 4173 | xmlXPathCountFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4174 | xmlXPathObjectPtr cur; |
| 4175 | |
| 4176 | CHECK_ARITY(1); |
| 4177 | if ((ctxt->value == NULL) || |
| 4178 | ((ctxt->value->type != XPATH_NODESET) && |
| 4179 | (ctxt->value->type != XPATH_XSLT_TREE))) |
| 4180 | XP_ERROR(XPATH_INVALID_TYPE); |
| 4181 | cur = valuePop(ctxt); |
| 4182 | |
| 4183 | valuePush(ctxt, xmlXPathNewFloat((double) cur->nodesetval->nodeNr)); |
| 4184 | xmlXPathFreeObject(cur); |
| 4185 | } |
| 4186 | |
| 4187 | /** |
| 4188 | * xmlXPathIdFunction: |
| 4189 | * @ctxt: the XPath Parser context |
| 4190 | * @nargs: the number of arguments |
| 4191 | * |
| 4192 | * Implement the id() XPath function |
| 4193 | * node-set id(object) |
| 4194 | * The id function selects elements by their unique ID |
| 4195 | * (see [5.2.1 Unique IDs]). When the argument to id is of type node-set, |
| 4196 | * then the result is the union of the result of applying id to the |
| 4197 | * string value of each of the nodes in the argument node-set. When the |
| 4198 | * argument to id is of any other type, the argument is converted to a |
| 4199 | * string as if by a call to the string function; the string is split |
| 4200 | * into a whitespace-separated list of tokens (whitespace is any sequence |
| 4201 | * of characters matching the production S); the result is a node-set |
| 4202 | * containing the elements in the same document as the context node that |
| 4203 | * have a unique ID equal to any of the tokens in the list. |
| 4204 | */ |
| 4205 | void |
| 4206 | xmlXPathIdFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4207 | const xmlChar *tokens; |
| 4208 | const xmlChar *cur; |
| 4209 | xmlChar *ID; |
| 4210 | xmlAttrPtr attr; |
| 4211 | xmlNodePtr elem = NULL; |
| 4212 | xmlXPathObjectPtr ret, obj; |
| 4213 | |
| 4214 | CHECK_ARITY(1); |
| 4215 | obj = valuePop(ctxt); |
| 4216 | if (obj == NULL) XP_ERROR(XPATH_INVALID_OPERAND); |
| 4217 | if (obj->type == XPATH_NODESET) { |
| 4218 | xmlXPathObjectPtr newobj; |
| 4219 | int i; |
| 4220 | |
| 4221 | ret = xmlXPathNewNodeSet(NULL); |
| 4222 | |
| 4223 | for (i = 0; i < obj->nodesetval->nodeNr; i++) { |
| 4224 | valuePush(ctxt, |
| 4225 | xmlXPathNewNodeSet(obj->nodesetval->nodeTab[i])); |
| 4226 | xmlXPathStringFunction(ctxt, 1); |
| 4227 | xmlXPathIdFunction(ctxt, 1); |
| 4228 | newobj = valuePop(ctxt); |
| 4229 | ret->nodesetval = xmlXPathNodeSetMerge(ret->nodesetval, |
| 4230 | newobj->nodesetval); |
| 4231 | xmlXPathFreeObject(newobj); |
| 4232 | } |
| 4233 | |
| 4234 | xmlXPathFreeObject(obj); |
| 4235 | valuePush(ctxt, ret); |
| 4236 | return; |
| 4237 | } |
| 4238 | if (obj->type != XPATH_STRING) { |
| 4239 | valuePush(ctxt, obj); |
| 4240 | xmlXPathStringFunction(ctxt, 1); |
| 4241 | obj = valuePop(ctxt); |
| 4242 | if (obj->type != XPATH_STRING) { |
| 4243 | xmlXPathFreeObject(obj); |
| 4244 | return; |
| 4245 | } |
| 4246 | } |
| 4247 | tokens = obj->stringval; |
| 4248 | |
| 4249 | ret = xmlXPathNewNodeSet(NULL); |
| 4250 | valuePush(ctxt, ret); |
| 4251 | if (tokens == NULL) { |
| 4252 | xmlXPathFreeObject(obj); |
| 4253 | return; |
| 4254 | } |
| 4255 | |
| 4256 | cur = tokens; |
| 4257 | |
| 4258 | while (IS_BLANK(*cur)) cur++; |
| 4259 | while (*cur != 0) { |
| 4260 | while ((IS_LETTER(*cur)) || (IS_DIGIT(*cur)) || |
| 4261 | (*cur == '.') || (*cur == '-') || |
| 4262 | (*cur == '_') || (*cur == ':') || |
| 4263 | (IS_COMBINING(*cur)) || |
| 4264 | (IS_EXTENDER(*cur))) |
| 4265 | cur++; |
| 4266 | |
| 4267 | if ((!IS_BLANK(*cur)) && (*cur != 0)) break; |
| 4268 | |
| 4269 | ID = xmlStrndup(tokens, cur - tokens); |
| 4270 | attr = xmlGetID(ctxt->context->doc, ID); |
| 4271 | if (attr != NULL) { |
| 4272 | elem = attr->parent; |
| 4273 | xmlXPathNodeSetAdd(ret->nodesetval, elem); |
| 4274 | } |
| 4275 | if (ID != NULL) |
| 4276 | xmlFree(ID); |
| 4277 | |
| 4278 | while (IS_BLANK(*cur)) cur++; |
| 4279 | tokens = cur; |
| 4280 | } |
| 4281 | xmlXPathFreeObject(obj); |
| 4282 | return; |
| 4283 | } |
| 4284 | |
| 4285 | /** |
| 4286 | * xmlXPathLocalNameFunction: |
| 4287 | * @ctxt: the XPath Parser context |
| 4288 | * @nargs: the number of arguments |
| 4289 | * |
| 4290 | * Implement the local-name() XPath function |
| 4291 | * string local-name(node-set?) |
| 4292 | * The local-name function returns a string containing the local part |
| 4293 | * of the name of the node in the argument node-set that is first in |
| 4294 | * document order. If the node-set is empty or the first node has no |
| 4295 | * name, an empty string is returned. If the argument is omitted it |
| 4296 | * defaults to the context node. |
| 4297 | */ |
| 4298 | void |
| 4299 | xmlXPathLocalNameFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4300 | xmlXPathObjectPtr cur; |
| 4301 | |
| 4302 | if (nargs == 0) { |
| 4303 | valuePush(ctxt, xmlXPathNewNodeSet(ctxt->context->node)); |
| 4304 | nargs = 1; |
| 4305 | } |
| 4306 | |
| 4307 | CHECK_ARITY(1); |
| 4308 | if ((ctxt->value == NULL) || |
| 4309 | ((ctxt->value->type != XPATH_NODESET) && |
| 4310 | (ctxt->value->type != XPATH_XSLT_TREE))) |
| 4311 | XP_ERROR(XPATH_INVALID_TYPE); |
| 4312 | cur = valuePop(ctxt); |
| 4313 | |
| 4314 | if (cur->nodesetval->nodeNr == 0) { |
| 4315 | valuePush(ctxt, xmlXPathNewCString("")); |
| 4316 | } else { |
| 4317 | int i = 0; /* Should be first in document order !!!!! */ |
| 4318 | switch (cur->nodesetval->nodeTab[i]->type) { |
| 4319 | case XML_ELEMENT_NODE: |
| 4320 | case XML_ATTRIBUTE_NODE: |
| 4321 | case XML_PI_NODE: |
| 4322 | valuePush(ctxt, |
| 4323 | xmlXPathNewString(cur->nodesetval->nodeTab[i]->name)); |
| 4324 | break; |
| 4325 | case XML_NAMESPACE_DECL: |
| 4326 | valuePush(ctxt, xmlXPathNewString( |
| 4327 | ((xmlNsPtr)cur->nodesetval->nodeTab[i])->prefix)); |
| 4328 | break; |
| 4329 | default: |
| 4330 | valuePush(ctxt, xmlXPathNewCString("")); |
| 4331 | } |
| 4332 | } |
| 4333 | xmlXPathFreeObject(cur); |
| 4334 | } |
| 4335 | |
| 4336 | /** |
| 4337 | * xmlXPathNamespaceURIFunction: |
| 4338 | * @ctxt: the XPath Parser context |
| 4339 | * @nargs: the number of arguments |
| 4340 | * |
| 4341 | * Implement the namespace-uri() XPath function |
| 4342 | * string namespace-uri(node-set?) |
| 4343 | * The namespace-uri function returns a string containing the |
| 4344 | * namespace URI of the expanded name of the node in the argument |
| 4345 | * node-set that is first in document order. If the node-set is empty, |
| 4346 | * the first node has no name, or the expanded name has no namespace |
| 4347 | * URI, an empty string is returned. If the argument is omitted it |
| 4348 | * defaults to the context node. |
| 4349 | */ |
| 4350 | void |
| 4351 | xmlXPathNamespaceURIFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4352 | xmlXPathObjectPtr cur; |
| 4353 | |
| 4354 | if (nargs == 0) { |
| 4355 | valuePush(ctxt, xmlXPathNewNodeSet(ctxt->context->node)); |
| 4356 | nargs = 1; |
| 4357 | } |
| 4358 | CHECK_ARITY(1); |
| 4359 | if ((ctxt->value == NULL) || |
| 4360 | ((ctxt->value->type != XPATH_NODESET) && |
| 4361 | (ctxt->value->type != XPATH_XSLT_TREE))) |
| 4362 | XP_ERROR(XPATH_INVALID_TYPE); |
| 4363 | cur = valuePop(ctxt); |
| 4364 | |
| 4365 | if (cur->nodesetval->nodeNr == 0) { |
| 4366 | valuePush(ctxt, xmlXPathNewCString("")); |
| 4367 | } else { |
| 4368 | int i = 0; /* Should be first in document order !!!!! */ |
| 4369 | switch (cur->nodesetval->nodeTab[i]->type) { |
| 4370 | case XML_ELEMENT_NODE: |
| 4371 | case XML_ATTRIBUTE_NODE: |
| 4372 | if (cur->nodesetval->nodeTab[i]->ns == NULL) |
| 4373 | valuePush(ctxt, xmlXPathNewCString("")); |
| 4374 | else |
| 4375 | valuePush(ctxt, xmlXPathNewString( |
| 4376 | cur->nodesetval->nodeTab[i]->ns->href)); |
| 4377 | break; |
| 4378 | default: |
| 4379 | valuePush(ctxt, xmlXPathNewCString("")); |
| 4380 | } |
| 4381 | } |
| 4382 | xmlXPathFreeObject(cur); |
| 4383 | } |
| 4384 | |
| 4385 | /** |
| 4386 | * xmlXPathNameFunction: |
| 4387 | * @ctxt: the XPath Parser context |
| 4388 | * @nargs: the number of arguments |
| 4389 | * |
| 4390 | * Implement the name() XPath function |
| 4391 | * string name(node-set?) |
| 4392 | * The name function returns a string containing a QName representing |
| 4393 | * the name of the node in the argument node-set that is first in documenti |
| 4394 | * order. The QName must represent the name with respect to the namespace |
| 4395 | * declarations in effect on the node whose name is being represented. |
| 4396 | * Typically, this will be the form in which the name occurred in the XML |
| 4397 | * source. This need not be the case if there are namespace declarations |
| 4398 | * in effect on the node that associate multiple prefixes with the same |
| 4399 | * namespace. However, an implementation may include information about |
| 4400 | * the original prefix in its representation of nodes; in this case, an |
| 4401 | * implementation can ensure that the returned string is always the same |
| 4402 | * as the QName used in the XML source. If the argument it omitted it |
| 4403 | * defaults to the context node. |
| 4404 | * Libxml keep the original prefix so the "real qualified name" used is |
| 4405 | * returned. |
| 4406 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 4407 | static void |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 4408 | xmlXPathNameFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4409 | xmlXPathObjectPtr cur; |
| 4410 | |
| 4411 | if (nargs == 0) { |
| 4412 | valuePush(ctxt, xmlXPathNewNodeSet(ctxt->context->node)); |
| 4413 | nargs = 1; |
| 4414 | } |
| 4415 | |
| 4416 | CHECK_ARITY(1); |
| 4417 | if ((ctxt->value == NULL) || |
| 4418 | ((ctxt->value->type != XPATH_NODESET) && |
| 4419 | (ctxt->value->type != XPATH_XSLT_TREE))) |
| 4420 | XP_ERROR(XPATH_INVALID_TYPE); |
| 4421 | cur = valuePop(ctxt); |
| 4422 | |
| 4423 | if (cur->nodesetval->nodeNr == 0) { |
| 4424 | valuePush(ctxt, xmlXPathNewCString("")); |
| 4425 | } else { |
| 4426 | int i = 0; /* Should be first in document order !!!!! */ |
| 4427 | |
| 4428 | switch (cur->nodesetval->nodeTab[i]->type) { |
| 4429 | case XML_ELEMENT_NODE: |
| 4430 | case XML_ATTRIBUTE_NODE: |
| 4431 | if (cur->nodesetval->nodeTab[i]->ns == NULL) |
| 4432 | valuePush(ctxt, xmlXPathNewString( |
| 4433 | cur->nodesetval->nodeTab[i]->name)); |
| 4434 | |
| 4435 | else { |
| 4436 | char name[2000]; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 4437 | snprintf(name, sizeof(name), "%s:%s", |
| 4438 | (char *) cur->nodesetval->nodeTab[i]->ns->prefix, |
| 4439 | (char *) cur->nodesetval->nodeTab[i]->name); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 4440 | name[sizeof(name) - 1] = 0; |
| 4441 | valuePush(ctxt, xmlXPathNewCString(name)); |
| 4442 | } |
| 4443 | break; |
| 4444 | default: |
| 4445 | valuePush(ctxt, |
| 4446 | xmlXPathNewNodeSet(cur->nodesetval->nodeTab[i])); |
| 4447 | xmlXPathLocalNameFunction(ctxt, 1); |
| 4448 | } |
| 4449 | } |
| 4450 | xmlXPathFreeObject(cur); |
| 4451 | } |
| 4452 | |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 4453 | |
| 4454 | /** |
| 4455 | * xmlXPathConvertString: |
| 4456 | * @val: an XPath object |
| 4457 | * |
| 4458 | * Converts an existing object to its string() equivalent |
| 4459 | * |
| 4460 | * Returns the new object, the old one is freed (or the operation |
| 4461 | * is done directly on @val) |
| 4462 | */ |
| 4463 | xmlXPathObjectPtr |
| 4464 | xmlXPathConvertString(xmlXPathObjectPtr val) { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 4465 | xmlXPathObjectPtr ret = NULL; |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 4466 | |
| 4467 | if (val == NULL) |
| 4468 | return(xmlXPathNewCString("")); |
| 4469 | switch (val->type) { |
| 4470 | case XPATH_UNDEFINED: |
| 4471 | #ifdef DEBUG_EXPR |
| 4472 | xmlGenericError(xmlGenericErrorContext, "String: undefined\n"); |
| 4473 | #endif |
| 4474 | ret = xmlXPathNewCString(""); |
| 4475 | break; |
| 4476 | case XPATH_XSLT_TREE: |
| 4477 | case XPATH_NODESET: |
| 4478 | if (val->nodesetval == NULL) |
| 4479 | ret = xmlXPathNewCString(""); |
| 4480 | else if (val->nodesetval->nodeNr == 0) { |
| 4481 | ret = xmlXPathNewCString(""); |
| 4482 | } else { |
| 4483 | xmlChar *res; |
| 4484 | |
| 4485 | xmlXPathNodeSetSort(val->nodesetval); |
| 4486 | res = xmlNodeGetContent(val->nodesetval->nodeTab[0]); |
| 4487 | /* TODO: avoid allocating res to free it */ |
| 4488 | ret = xmlXPathNewString(res); |
| 4489 | if (res != NULL) |
| 4490 | xmlFree(res); |
| 4491 | } |
| 4492 | break; |
| 4493 | case XPATH_STRING: |
| 4494 | return(val); |
| 4495 | case XPATH_BOOLEAN: |
| 4496 | if (val->boolval) ret = xmlXPathNewCString("true"); |
| 4497 | else ret = xmlXPathNewCString("false"); |
| 4498 | break; |
| 4499 | case XPATH_NUMBER: { |
| 4500 | char buf[100]; |
| 4501 | |
| 4502 | xmlXPathFormatNumber(val->floatval, buf, sizeof(buf)); |
| 4503 | ret = xmlXPathNewCString(buf); |
| 4504 | break; |
| 4505 | } |
| 4506 | case XPATH_USERS: |
| 4507 | case XPATH_POINT: |
| 4508 | case XPATH_RANGE: |
| 4509 | case XPATH_LOCATIONSET: |
| 4510 | TODO |
| 4511 | ret = xmlXPathNewCString(""); |
| 4512 | break; |
| 4513 | } |
| 4514 | xmlXPathFreeObject(val); |
| 4515 | return(ret); |
| 4516 | } |
| 4517 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 4518 | /** |
| 4519 | * xmlXPathStringFunction: |
| 4520 | * @ctxt: the XPath Parser context |
| 4521 | * @nargs: the number of arguments |
| 4522 | * |
| 4523 | * Implement the string() XPath function |
| 4524 | * string string(object?) |
| 4525 | * he string function converts an object to a string as follows: |
| 4526 | * - A node-set is converted to a string by returning the value of |
| 4527 | * the node in the node-set that is first in document order. |
| 4528 | * If the node-set is empty, an empty string is returned. |
| 4529 | * - A number is converted to a string as follows |
| 4530 | * + NaN is converted to the string NaN |
| 4531 | * + positive zero is converted to the string 0 |
| 4532 | * + negative zero is converted to the string 0 |
| 4533 | * + positive infinity is converted to the string Infinity |
| 4534 | * + negative infinity is converted to the string -Infinity |
| 4535 | * + if the number is an integer, the number is represented in |
| 4536 | * decimal form as a Number with no decimal point and no leading |
| 4537 | * zeros, preceded by a minus sign (-) if the number is negative |
| 4538 | * + otherwise, the number is represented in decimal form as a |
| 4539 | * Number including a decimal point with at least one digit |
| 4540 | * before the decimal point and at least one digit after the |
| 4541 | * decimal point, preceded by a minus sign (-) if the number |
| 4542 | * is negative; there must be no leading zeros before the decimal |
| 4543 | * point apart possibly from the one required digit immediatelyi |
| 4544 | * before the decimal point; beyond the one required digit |
| 4545 | * after the decimal point there must be as many, but only as |
| 4546 | * many, more digits as are needed to uniquely distinguish the |
| 4547 | * number from all other IEEE 754 numeric values. |
| 4548 | * - The boolean false value is converted to the string false. |
| 4549 | * The boolean true value is converted to the string true. |
| 4550 | * |
| 4551 | * If the argument is omitted, it defaults to a node-set with the |
| 4552 | * context node as its only member. |
| 4553 | */ |
| 4554 | void |
| 4555 | xmlXPathStringFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4556 | xmlXPathObjectPtr cur; |
| 4557 | |
| 4558 | if (nargs == 0) { |
| 4559 | valuePush(ctxt, xmlXPathNewNodeSet(ctxt->context->node)); |
| 4560 | nargs = 1; |
| 4561 | } |
| 4562 | |
| 4563 | CHECK_ARITY(1); |
| 4564 | cur = valuePop(ctxt); |
| 4565 | if (cur == NULL) XP_ERROR(XPATH_INVALID_OPERAND); |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 4566 | cur = xmlXPathConvertString(cur); |
| 4567 | valuePush(ctxt, cur); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 4568 | } |
| 4569 | |
| 4570 | /** |
| 4571 | * xmlXPathStringLengthFunction: |
| 4572 | * @ctxt: the XPath Parser context |
| 4573 | * @nargs: the number of arguments |
| 4574 | * |
| 4575 | * Implement the string-length() XPath function |
| 4576 | * number string-length(string?) |
| 4577 | * The string-length returns the number of characters in the string |
| 4578 | * (see [3.6 Strings]). If the argument is omitted, it defaults to |
| 4579 | * the context node converted to a string, in other words the value |
| 4580 | * of the context node. |
| 4581 | */ |
| 4582 | void |
| 4583 | xmlXPathStringLengthFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4584 | xmlXPathObjectPtr cur; |
| 4585 | |
| 4586 | if (nargs == 0) { |
| 4587 | if (ctxt->context->node == NULL) { |
| 4588 | valuePush(ctxt, xmlXPathNewFloat(0)); |
| 4589 | } else { |
| 4590 | xmlChar *content; |
| 4591 | |
| 4592 | content = xmlNodeGetContent(ctxt->context->node); |
| 4593 | valuePush(ctxt, xmlXPathNewFloat(xmlStrlen(content))); |
| 4594 | xmlFree(content); |
| 4595 | } |
| 4596 | return; |
| 4597 | } |
| 4598 | CHECK_ARITY(1); |
| 4599 | CAST_TO_STRING; |
| 4600 | CHECK_TYPE(XPATH_STRING); |
| 4601 | cur = valuePop(ctxt); |
| 4602 | valuePush(ctxt, xmlXPathNewFloat(xmlStrlen(cur->stringval))); |
| 4603 | xmlXPathFreeObject(cur); |
| 4604 | } |
| 4605 | |
| 4606 | /** |
| 4607 | * xmlXPathConcatFunction: |
| 4608 | * @ctxt: the XPath Parser context |
| 4609 | * @nargs: the number of arguments |
| 4610 | * |
| 4611 | * Implement the concat() XPath function |
| 4612 | * string concat(string, string, string*) |
| 4613 | * The concat function returns the concatenation of its arguments. |
| 4614 | */ |
| 4615 | void |
| 4616 | xmlXPathConcatFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4617 | xmlXPathObjectPtr cur, newobj; |
| 4618 | xmlChar *tmp; |
| 4619 | |
| 4620 | if (nargs < 2) { |
| 4621 | CHECK_ARITY(2); |
| 4622 | } |
| 4623 | |
| 4624 | CAST_TO_STRING; |
| 4625 | cur = valuePop(ctxt); |
| 4626 | if ((cur == NULL) || (cur->type != XPATH_STRING)) { |
| 4627 | xmlXPathFreeObject(cur); |
| 4628 | return; |
| 4629 | } |
| 4630 | nargs--; |
| 4631 | |
| 4632 | while (nargs > 0) { |
| 4633 | CAST_TO_STRING; |
| 4634 | newobj = valuePop(ctxt); |
| 4635 | if ((newobj == NULL) || (newobj->type != XPATH_STRING)) { |
| 4636 | xmlXPathFreeObject(newobj); |
| 4637 | xmlXPathFreeObject(cur); |
| 4638 | XP_ERROR(XPATH_INVALID_TYPE); |
| 4639 | } |
| 4640 | tmp = xmlStrcat(newobj->stringval, cur->stringval); |
| 4641 | newobj->stringval = cur->stringval; |
| 4642 | cur->stringval = tmp; |
| 4643 | |
| 4644 | xmlXPathFreeObject(newobj); |
| 4645 | nargs--; |
| 4646 | } |
| 4647 | valuePush(ctxt, cur); |
| 4648 | } |
| 4649 | |
| 4650 | /** |
| 4651 | * xmlXPathContainsFunction: |
| 4652 | * @ctxt: the XPath Parser context |
| 4653 | * @nargs: the number of arguments |
| 4654 | * |
| 4655 | * Implement the contains() XPath function |
| 4656 | * boolean contains(string, string) |
| 4657 | * The contains function returns true if the first argument string |
| 4658 | * contains the second argument string, and otherwise returns false. |
| 4659 | */ |
| 4660 | void |
| 4661 | xmlXPathContainsFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4662 | xmlXPathObjectPtr hay, needle; |
| 4663 | |
| 4664 | CHECK_ARITY(2); |
| 4665 | CAST_TO_STRING; |
| 4666 | CHECK_TYPE(XPATH_STRING); |
| 4667 | needle = valuePop(ctxt); |
| 4668 | CAST_TO_STRING; |
| 4669 | hay = valuePop(ctxt); |
| 4670 | if ((hay == NULL) || (hay->type != XPATH_STRING)) { |
| 4671 | xmlXPathFreeObject(hay); |
| 4672 | xmlXPathFreeObject(needle); |
| 4673 | XP_ERROR(XPATH_INVALID_TYPE); |
| 4674 | } |
| 4675 | if (xmlStrstr(hay->stringval, needle->stringval)) |
| 4676 | valuePush(ctxt, xmlXPathNewBoolean(1)); |
| 4677 | else |
| 4678 | valuePush(ctxt, xmlXPathNewBoolean(0)); |
| 4679 | xmlXPathFreeObject(hay); |
| 4680 | xmlXPathFreeObject(needle); |
| 4681 | } |
| 4682 | |
| 4683 | /** |
| 4684 | * xmlXPathStartsWithFunction: |
| 4685 | * @ctxt: the XPath Parser context |
| 4686 | * @nargs: the number of arguments |
| 4687 | * |
| 4688 | * Implement the starts-with() XPath function |
| 4689 | * boolean starts-with(string, string) |
| 4690 | * The starts-with function returns true if the first argument string |
| 4691 | * starts with the second argument string, and otherwise returns false. |
| 4692 | */ |
| 4693 | void |
| 4694 | xmlXPathStartsWithFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4695 | xmlXPathObjectPtr hay, needle; |
| 4696 | int n; |
| 4697 | |
| 4698 | CHECK_ARITY(2); |
| 4699 | CAST_TO_STRING; |
| 4700 | CHECK_TYPE(XPATH_STRING); |
| 4701 | needle = valuePop(ctxt); |
| 4702 | CAST_TO_STRING; |
| 4703 | hay = valuePop(ctxt); |
| 4704 | if ((hay == NULL) || (hay->type != XPATH_STRING)) { |
| 4705 | xmlXPathFreeObject(hay); |
| 4706 | xmlXPathFreeObject(needle); |
| 4707 | XP_ERROR(XPATH_INVALID_TYPE); |
| 4708 | } |
| 4709 | n = xmlStrlen(needle->stringval); |
| 4710 | if (xmlStrncmp(hay->stringval, needle->stringval, n)) |
| 4711 | valuePush(ctxt, xmlXPathNewBoolean(0)); |
| 4712 | else |
| 4713 | valuePush(ctxt, xmlXPathNewBoolean(1)); |
| 4714 | xmlXPathFreeObject(hay); |
| 4715 | xmlXPathFreeObject(needle); |
| 4716 | } |
| 4717 | |
| 4718 | /** |
| 4719 | * xmlXPathSubstringFunction: |
| 4720 | * @ctxt: the XPath Parser context |
| 4721 | * @nargs: the number of arguments |
| 4722 | * |
| 4723 | * Implement the substring() XPath function |
| 4724 | * string substring(string, number, number?) |
| 4725 | * The substring function returns the substring of the first argument |
| 4726 | * starting at the position specified in the second argument with |
| 4727 | * length specified in the third argument. For example, |
| 4728 | * substring("12345",2,3) returns "234". If the third argument is not |
| 4729 | * specified, it returns the substring starting at the position specified |
| 4730 | * in the second argument and continuing to the end of the string. For |
| 4731 | * example, substring("12345",2) returns "2345". More precisely, each |
| 4732 | * character in the string (see [3.6 Strings]) is considered to have a |
| 4733 | * numeric position: the position of the first character is 1, the position |
| 4734 | * of the second character is 2 and so on. The returned substring contains |
| 4735 | * those characters for which the position of the character is greater than |
| 4736 | * or equal to the second argument and, if the third argument is specified, |
| 4737 | * less than the sum of the second and third arguments; the comparisons |
| 4738 | * and addition used for the above follow the standard IEEE 754 rules. Thus: |
| 4739 | * - substring("12345", 1.5, 2.6) returns "234" |
| 4740 | * - substring("12345", 0, 3) returns "12" |
| 4741 | * - substring("12345", 0 div 0, 3) returns "" |
| 4742 | * - substring("12345", 1, 0 div 0) returns "" |
| 4743 | * - substring("12345", -42, 1 div 0) returns "12345" |
| 4744 | * - substring("12345", -1 div 0, 1 div 0) returns "" |
| 4745 | */ |
| 4746 | void |
| 4747 | xmlXPathSubstringFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4748 | xmlXPathObjectPtr str, start, len; |
| 4749 | double le, in; |
| 4750 | int i, l; |
| 4751 | xmlChar *ret; |
| 4752 | |
| 4753 | /* |
| 4754 | * Conformance needs to be checked !!!!! |
| 4755 | */ |
| 4756 | if (nargs < 2) { |
| 4757 | CHECK_ARITY(2); |
| 4758 | } |
| 4759 | if (nargs > 3) { |
| 4760 | CHECK_ARITY(3); |
| 4761 | } |
| 4762 | if (nargs == 3) { |
| 4763 | CAST_TO_NUMBER; |
| 4764 | CHECK_TYPE(XPATH_NUMBER); |
| 4765 | len = valuePop(ctxt); |
| 4766 | le = len->floatval; |
| 4767 | xmlXPathFreeObject(len); |
| 4768 | } else { |
| 4769 | le = 2000000000; |
| 4770 | } |
| 4771 | CAST_TO_NUMBER; |
| 4772 | CHECK_TYPE(XPATH_NUMBER); |
| 4773 | start = valuePop(ctxt); |
| 4774 | in = start->floatval; |
| 4775 | xmlXPathFreeObject(start); |
| 4776 | CAST_TO_STRING; |
| 4777 | CHECK_TYPE(XPATH_STRING); |
| 4778 | str = valuePop(ctxt); |
| 4779 | le += in; |
| 4780 | |
| 4781 | /* integer index of the first char */ |
| 4782 | i = (int) in; |
| 4783 | if (((double)i) != in) i++; |
| 4784 | |
| 4785 | /* integer index of the last char */ |
| 4786 | l = (int) le; |
| 4787 | if (((double)l) != le) l++; |
| 4788 | |
| 4789 | /* back to a zero based len */ |
| 4790 | i--; |
| 4791 | l--; |
| 4792 | |
| 4793 | /* check against the string len */ |
| 4794 | if (l > 1024) { |
| 4795 | l = xmlStrlen(str->stringval); |
| 4796 | } |
| 4797 | if (i < 0) { |
| 4798 | i = 0; |
| 4799 | } |
| 4800 | |
| 4801 | /* number of chars to copy */ |
| 4802 | l -= i; |
| 4803 | |
| 4804 | ret = xmlStrsub(str->stringval, i, l); |
| 4805 | if (ret == NULL) |
| 4806 | valuePush(ctxt, xmlXPathNewCString("")); |
| 4807 | else { |
| 4808 | valuePush(ctxt, xmlXPathNewString(ret)); |
| 4809 | xmlFree(ret); |
| 4810 | } |
| 4811 | xmlXPathFreeObject(str); |
| 4812 | } |
| 4813 | |
| 4814 | /** |
| 4815 | * xmlXPathSubstringBeforeFunction: |
| 4816 | * @ctxt: the XPath Parser context |
| 4817 | * @nargs: the number of arguments |
| 4818 | * |
| 4819 | * Implement the substring-before() XPath function |
| 4820 | * string substring-before(string, string) |
| 4821 | * The substring-before function returns the substring of the first |
| 4822 | * argument string that precedes the first occurrence of the second |
| 4823 | * argument string in the first argument string, or the empty string |
| 4824 | * if the first argument string does not contain the second argument |
| 4825 | * string. For example, substring-before("1999/04/01","/") returns 1999. |
| 4826 | */ |
| 4827 | void |
| 4828 | xmlXPathSubstringBeforeFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4829 | xmlXPathObjectPtr str; |
| 4830 | xmlXPathObjectPtr find; |
| 4831 | xmlBufferPtr target; |
| 4832 | const xmlChar *point; |
| 4833 | int offset; |
| 4834 | |
| 4835 | CHECK_ARITY(2); |
| 4836 | CAST_TO_STRING; |
| 4837 | find = valuePop(ctxt); |
| 4838 | CAST_TO_STRING; |
| 4839 | str = valuePop(ctxt); |
| 4840 | |
| 4841 | target = xmlBufferCreate(); |
| 4842 | if (target) { |
| 4843 | point = xmlStrstr(str->stringval, find->stringval); |
| 4844 | if (point) { |
| 4845 | offset = (int)(point - str->stringval); |
| 4846 | xmlBufferAdd(target, str->stringval, offset); |
| 4847 | } |
| 4848 | valuePush(ctxt, xmlXPathNewString(xmlBufferContent(target))); |
| 4849 | xmlBufferFree(target); |
| 4850 | } |
| 4851 | |
| 4852 | xmlXPathFreeObject(str); |
| 4853 | xmlXPathFreeObject(find); |
| 4854 | } |
| 4855 | |
| 4856 | /** |
| 4857 | * xmlXPathSubstringAfterFunction: |
| 4858 | * @ctxt: the XPath Parser context |
| 4859 | * @nargs: the number of arguments |
| 4860 | * |
| 4861 | * Implement the substring-after() XPath function |
| 4862 | * string substring-after(string, string) |
| 4863 | * The substring-after function returns the substring of the first |
| 4864 | * argument string that follows the first occurrence of the second |
| 4865 | * argument string in the first argument string, or the empty stringi |
| 4866 | * if the first argument string does not contain the second argument |
| 4867 | * string. For example, substring-after("1999/04/01","/") returns 04/01, |
| 4868 | * and substring-after("1999/04/01","19") returns 99/04/01. |
| 4869 | */ |
| 4870 | void |
| 4871 | xmlXPathSubstringAfterFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4872 | xmlXPathObjectPtr str; |
| 4873 | xmlXPathObjectPtr find; |
| 4874 | xmlBufferPtr target; |
| 4875 | const xmlChar *point; |
| 4876 | int offset; |
| 4877 | |
| 4878 | CHECK_ARITY(2); |
| 4879 | CAST_TO_STRING; |
| 4880 | find = valuePop(ctxt); |
| 4881 | CAST_TO_STRING; |
| 4882 | str = valuePop(ctxt); |
| 4883 | |
| 4884 | target = xmlBufferCreate(); |
| 4885 | if (target) { |
| 4886 | point = xmlStrstr(str->stringval, find->stringval); |
| 4887 | if (point) { |
| 4888 | offset = (int)(point - str->stringval) + xmlStrlen(find->stringval); |
| 4889 | xmlBufferAdd(target, &str->stringval[offset], |
| 4890 | xmlStrlen(str->stringval) - offset); |
| 4891 | } |
| 4892 | valuePush(ctxt, xmlXPathNewString(xmlBufferContent(target))); |
| 4893 | xmlBufferFree(target); |
| 4894 | } |
| 4895 | |
| 4896 | xmlXPathFreeObject(str); |
| 4897 | xmlXPathFreeObject(find); |
| 4898 | } |
| 4899 | |
| 4900 | /** |
| 4901 | * xmlXPathNormalizeFunction: |
| 4902 | * @ctxt: the XPath Parser context |
| 4903 | * @nargs: the number of arguments |
| 4904 | * |
| 4905 | * Implement the normalize-space() XPath function |
| 4906 | * string normalize-space(string?) |
| 4907 | * The normalize-space function returns the argument string with white |
| 4908 | * space normalized by stripping leading and trailing whitespace |
| 4909 | * and replacing sequences of whitespace characters by a single |
| 4910 | * space. Whitespace characters are the same allowed by the S production |
| 4911 | * in XML. If the argument is omitted, it defaults to the context |
| 4912 | * node converted to a string, in other words the value of the context node. |
| 4913 | */ |
| 4914 | void |
| 4915 | xmlXPathNormalizeFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4916 | xmlXPathObjectPtr obj = NULL; |
| 4917 | xmlChar *source = NULL; |
| 4918 | xmlBufferPtr target; |
| 4919 | xmlChar blank; |
| 4920 | |
| 4921 | if (nargs == 0) { |
| 4922 | /* Use current context node */ |
| 4923 | valuePush(ctxt, xmlXPathNewNodeSet(ctxt->context->node)); |
| 4924 | xmlXPathStringFunction(ctxt, 1); |
| 4925 | nargs = 1; |
| 4926 | } |
| 4927 | |
| 4928 | CHECK_ARITY(1); |
| 4929 | CAST_TO_STRING; |
| 4930 | CHECK_TYPE(XPATH_STRING); |
| 4931 | obj = valuePop(ctxt); |
| 4932 | source = obj->stringval; |
| 4933 | |
| 4934 | target = xmlBufferCreate(); |
| 4935 | if (target && source) { |
| 4936 | |
| 4937 | /* Skip leading whitespaces */ |
| 4938 | while (IS_BLANK(*source)) |
| 4939 | source++; |
| 4940 | |
| 4941 | /* Collapse intermediate whitespaces, and skip trailing whitespaces */ |
| 4942 | blank = 0; |
| 4943 | while (*source) { |
| 4944 | if (IS_BLANK(*source)) { |
| 4945 | blank = *source; |
| 4946 | } else { |
| 4947 | if (blank) { |
| 4948 | xmlBufferAdd(target, &blank, 1); |
| 4949 | blank = 0; |
| 4950 | } |
| 4951 | xmlBufferAdd(target, source, 1); |
| 4952 | } |
| 4953 | source++; |
| 4954 | } |
| 4955 | |
| 4956 | valuePush(ctxt, xmlXPathNewString(xmlBufferContent(target))); |
| 4957 | xmlBufferFree(target); |
| 4958 | } |
| 4959 | xmlXPathFreeObject(obj); |
| 4960 | } |
| 4961 | |
| 4962 | /** |
| 4963 | * xmlXPathTranslateFunction: |
| 4964 | * @ctxt: the XPath Parser context |
| 4965 | * @nargs: the number of arguments |
| 4966 | * |
| 4967 | * Implement the translate() XPath function |
| 4968 | * string translate(string, string, string) |
| 4969 | * The translate function returns the first argument string with |
| 4970 | * occurrences of characters in the second argument string replaced |
| 4971 | * by the character at the corresponding position in the third argument |
| 4972 | * string. For example, translate("bar","abc","ABC") returns the string |
| 4973 | * BAr. If there is a character in the second argument string with no |
| 4974 | * character at a corresponding position in the third argument string |
| 4975 | * (because the second argument string is longer than the third argument |
| 4976 | * string), then occurrences of that character in the first argument |
| 4977 | * string are removed. For example, translate("--aaa--","abc-","ABC") |
| 4978 | * returns "AAA". If a character occurs more than once in second |
| 4979 | * argument string, then the first occurrence determines the replacement |
| 4980 | * character. If the third argument string is longer than the second |
| 4981 | * argument string, then excess characters are ignored. |
| 4982 | */ |
| 4983 | void |
| 4984 | xmlXPathTranslateFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 4985 | xmlXPathObjectPtr str; |
| 4986 | xmlXPathObjectPtr from; |
| 4987 | xmlXPathObjectPtr to; |
| 4988 | xmlBufferPtr target; |
| 4989 | int i, offset, max; |
| 4990 | xmlChar ch; |
| 4991 | const xmlChar *point; |
| 4992 | |
| 4993 | CHECK_ARITY(3); |
| 4994 | |
| 4995 | CAST_TO_STRING; |
| 4996 | to = valuePop(ctxt); |
| 4997 | CAST_TO_STRING; |
| 4998 | from = valuePop(ctxt); |
| 4999 | CAST_TO_STRING; |
| 5000 | str = valuePop(ctxt); |
| 5001 | |
| 5002 | target = xmlBufferCreate(); |
| 5003 | if (target) { |
| 5004 | max = xmlStrlen(to->stringval); |
| 5005 | for (i = 0; (ch = str->stringval[i]); i++) { |
| 5006 | point = xmlStrchr(from->stringval, ch); |
| 5007 | if (point) { |
| 5008 | /* Warning: This may not work with UTF-8 */ |
| 5009 | offset = (int)(point - from->stringval); |
| 5010 | if (offset < max) |
| 5011 | xmlBufferAdd(target, &to->stringval[offset], 1); |
| 5012 | } else |
| 5013 | xmlBufferAdd(target, &ch, 1); |
| 5014 | } |
| 5015 | } |
| 5016 | valuePush(ctxt, xmlXPathNewString(xmlBufferContent(target))); |
| 5017 | xmlBufferFree(target); |
| 5018 | xmlXPathFreeObject(str); |
| 5019 | xmlXPathFreeObject(from); |
| 5020 | xmlXPathFreeObject(to); |
| 5021 | } |
| 5022 | |
| 5023 | /** |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 5024 | * xmlXPathConvertBoolean: |
| 5025 | * @val: an XPath object |
| 5026 | * |
| 5027 | * Converts an existing object to its boolean() equivalent |
| 5028 | * |
| 5029 | * Returns the new object, the old one is freed (or the operation |
| 5030 | * is done directly on @val) |
| 5031 | */ |
| 5032 | xmlXPathObjectPtr |
| 5033 | xmlXPathConvertBoolean(xmlXPathObjectPtr val) { |
| 5034 | int res = 0; |
| 5035 | |
| 5036 | if (val == NULL) |
| 5037 | return(NULL); |
| 5038 | switch (val->type) { |
| 5039 | case XPATH_NODESET: |
| 5040 | case XPATH_XSLT_TREE: |
| 5041 | if ((val->nodesetval == NULL) || |
| 5042 | (val->nodesetval->nodeNr == 0)) res = 0; |
| 5043 | else |
| 5044 | res = 1; |
| 5045 | break; |
| 5046 | case XPATH_STRING: |
| 5047 | if ((val->stringval == NULL) || |
| 5048 | (val->stringval[0] == 0)) res = 0; |
| 5049 | else |
| 5050 | res = 1; |
| 5051 | break; |
| 5052 | case XPATH_BOOLEAN: |
| 5053 | return(val); |
| 5054 | case XPATH_NUMBER: |
| 5055 | if (val->floatval) res = 1; |
| 5056 | break; |
| 5057 | default: |
| 5058 | STRANGE |
| 5059 | } |
| 5060 | xmlXPathFreeObject(val); |
| 5061 | return(xmlXPathNewBoolean(res)); |
| 5062 | } |
| 5063 | |
| 5064 | /** |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5065 | * xmlXPathBooleanFunction: |
| 5066 | * @ctxt: the XPath Parser context |
| 5067 | * @nargs: the number of arguments |
| 5068 | * |
| 5069 | * Implement the boolean() XPath function |
| 5070 | * boolean boolean(object) |
| 5071 | * he boolean function converts its argument to a boolean as follows: |
| 5072 | * - a number is true if and only if it is neither positive or |
| 5073 | * negative zero nor NaN |
| 5074 | * - a node-set is true if and only if it is non-empty |
| 5075 | * - a string is true if and only if its length is non-zero |
| 5076 | */ |
| 5077 | void |
| 5078 | xmlXPathBooleanFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 5079 | xmlXPathObjectPtr cur; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5080 | |
| 5081 | CHECK_ARITY(1); |
| 5082 | cur = valuePop(ctxt); |
| 5083 | if (cur == NULL) XP_ERROR(XPATH_INVALID_OPERAND); |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 5084 | cur = xmlXPathConvertBoolean(cur); |
| 5085 | valuePush(ctxt, cur); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5086 | } |
| 5087 | |
| 5088 | /** |
| 5089 | * xmlXPathNotFunction: |
| 5090 | * @ctxt: the XPath Parser context |
| 5091 | * @nargs: the number of arguments |
| 5092 | * |
| 5093 | * Implement the not() XPath function |
| 5094 | * boolean not(boolean) |
| 5095 | * The not function returns true if its argument is false, |
| 5096 | * and false otherwise. |
| 5097 | */ |
| 5098 | void |
| 5099 | xmlXPathNotFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 5100 | CHECK_ARITY(1); |
| 5101 | CAST_TO_BOOLEAN; |
| 5102 | CHECK_TYPE(XPATH_BOOLEAN); |
| 5103 | ctxt->value->boolval = ! ctxt->value->boolval; |
| 5104 | } |
| 5105 | |
| 5106 | /** |
| 5107 | * xmlXPathTrueFunction: |
| 5108 | * @ctxt: the XPath Parser context |
| 5109 | * @nargs: the number of arguments |
| 5110 | * |
| 5111 | * Implement the true() XPath function |
| 5112 | * boolean true() |
| 5113 | */ |
| 5114 | void |
| 5115 | xmlXPathTrueFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 5116 | CHECK_ARITY(0); |
| 5117 | valuePush(ctxt, xmlXPathNewBoolean(1)); |
| 5118 | } |
| 5119 | |
| 5120 | /** |
| 5121 | * xmlXPathFalseFunction: |
| 5122 | * @ctxt: the XPath Parser context |
| 5123 | * @nargs: the number of arguments |
| 5124 | * |
| 5125 | * Implement the false() XPath function |
| 5126 | * boolean false() |
| 5127 | */ |
| 5128 | void |
| 5129 | xmlXPathFalseFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 5130 | CHECK_ARITY(0); |
| 5131 | valuePush(ctxt, xmlXPathNewBoolean(0)); |
| 5132 | } |
| 5133 | |
| 5134 | /** |
| 5135 | * xmlXPathLangFunction: |
| 5136 | * @ctxt: the XPath Parser context |
| 5137 | * @nargs: the number of arguments |
| 5138 | * |
| 5139 | * Implement the lang() XPath function |
| 5140 | * boolean lang(string) |
| 5141 | * The lang function returns true or false depending on whether the |
| 5142 | * language of the context node as specified by xml:lang attributes |
| 5143 | * is the same as or is a sublanguage of the language specified by |
| 5144 | * the argument string. The language of the context node is determined |
| 5145 | * by the value of the xml:lang attribute on the context node, or, if |
| 5146 | * the context node has no xml:lang attribute, by the value of the |
| 5147 | * xml:lang attribute on the nearest ancestor of the context node that |
| 5148 | * has an xml:lang attribute. If there is no such attribute, then lang |
| 5149 | * returns false. If there is such an attribute, then lang returns |
| 5150 | * true if the attribute value is equal to the argument ignoring case, |
| 5151 | * or if there is some suffix starting with - such that the attribute |
| 5152 | * value is equal to the argument ignoring that suffix of the attribute |
| 5153 | * value and ignoring case. |
| 5154 | */ |
| 5155 | void |
| 5156 | xmlXPathLangFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 5157 | xmlXPathObjectPtr val; |
| 5158 | const xmlChar *theLang; |
| 5159 | const xmlChar *lang; |
| 5160 | int ret = 0; |
| 5161 | int i; |
| 5162 | |
| 5163 | CHECK_ARITY(1); |
| 5164 | CAST_TO_STRING; |
| 5165 | CHECK_TYPE(XPATH_STRING); |
| 5166 | val = valuePop(ctxt); |
| 5167 | lang = val->stringval; |
| 5168 | theLang = xmlNodeGetLang(ctxt->context->node); |
| 5169 | if ((theLang != NULL) && (lang != NULL)) { |
| 5170 | for (i = 0;lang[i] != 0;i++) |
| 5171 | if (toupper(lang[i]) != toupper(theLang[i])) |
| 5172 | goto not_equal; |
| 5173 | ret = 1; |
| 5174 | } |
| 5175 | not_equal: |
| 5176 | xmlXPathFreeObject(val); |
| 5177 | valuePush(ctxt, xmlXPathNewBoolean(ret)); |
| 5178 | } |
| 5179 | |
| 5180 | /** |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 5181 | * xmlXPathConvertNumber: |
| 5182 | * @val: an XPath object |
| 5183 | * |
| 5184 | * Converts an existing object to its number() equivalent |
| 5185 | * |
| 5186 | * Returns the new object, the old one is freed (or the operation |
| 5187 | * is done directly on @val) |
| 5188 | */ |
| 5189 | xmlXPathObjectPtr |
| 5190 | xmlXPathConvertNumber(xmlXPathObjectPtr val) { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 5191 | xmlXPathObjectPtr ret = NULL; |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 5192 | double res; |
| 5193 | |
| 5194 | if (val == NULL) |
| 5195 | return(xmlXPathNewFloat(0.0)); |
| 5196 | switch (val->type) { |
| 5197 | case XPATH_UNDEFINED: |
| 5198 | #ifdef DEBUG_EXPR |
| 5199 | xmlGenericError(xmlGenericErrorContext, "NUMBER: undefined\n"); |
| 5200 | #endif |
| 5201 | ret = xmlXPathNewFloat(0.0); |
| 5202 | break; |
| 5203 | case XPATH_XSLT_TREE: |
| 5204 | case XPATH_NODESET: |
| 5205 | val = xmlXPathConvertString(val); |
| 5206 | /* no break on purpose */ |
| 5207 | case XPATH_STRING: |
| 5208 | res = xmlXPathStringEvalNumber(val->stringval); |
| 5209 | ret = xmlXPathNewFloat(res); |
| 5210 | break; |
| 5211 | case XPATH_BOOLEAN: |
| 5212 | if (val->boolval) ret = xmlXPathNewFloat(1.0); |
| 5213 | else ret = xmlXPathNewFloat(0.0); |
| 5214 | break; |
| 5215 | case XPATH_NUMBER: |
| 5216 | return(val); |
| 5217 | case XPATH_USERS: |
| 5218 | case XPATH_POINT: |
| 5219 | case XPATH_RANGE: |
| 5220 | case XPATH_LOCATIONSET: |
| 5221 | TODO |
| 5222 | ret = xmlXPathNewFloat(0.0); |
| 5223 | break; |
| 5224 | } |
| 5225 | xmlXPathFreeObject(val); |
| 5226 | return(ret); |
| 5227 | } |
| 5228 | |
| 5229 | /** |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5230 | * xmlXPathNumberFunction: |
| 5231 | * @ctxt: the XPath Parser context |
| 5232 | * @nargs: the number of arguments |
| 5233 | * |
| 5234 | * Implement the number() XPath function |
| 5235 | * number number(object?) |
| 5236 | */ |
| 5237 | void |
| 5238 | xmlXPathNumberFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 5239 | xmlXPathObjectPtr cur; |
| 5240 | double res; |
| 5241 | |
| 5242 | if (nargs == 0) { |
| 5243 | if (ctxt->context->node == NULL) { |
| 5244 | valuePush(ctxt, xmlXPathNewFloat(0.0)); |
| 5245 | } else { |
| 5246 | xmlChar* content = xmlNodeGetContent(ctxt->context->node); |
| 5247 | |
| 5248 | res = xmlXPathStringEvalNumber(content); |
| 5249 | valuePush(ctxt, xmlXPathNewFloat(res)); |
| 5250 | xmlFree(content); |
| 5251 | } |
| 5252 | return; |
| 5253 | } |
| 5254 | |
| 5255 | CHECK_ARITY(1); |
| 5256 | cur = valuePop(ctxt); |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 5257 | cur = xmlXPathConvertNumber(cur); |
| 5258 | valuePush(ctxt, cur); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5259 | } |
| 5260 | |
| 5261 | /** |
| 5262 | * xmlXPathSumFunction: |
| 5263 | * @ctxt: the XPath Parser context |
| 5264 | * @nargs: the number of arguments |
| 5265 | * |
| 5266 | * Implement the sum() XPath function |
| 5267 | * number sum(node-set) |
| 5268 | * The sum function returns the sum of the values of the nodes in |
| 5269 | * the argument node-set. |
| 5270 | */ |
| 5271 | void |
| 5272 | xmlXPathSumFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 5273 | xmlXPathObjectPtr cur; |
| 5274 | int i; |
| 5275 | |
| 5276 | CHECK_ARITY(1); |
| 5277 | if ((ctxt->value == NULL) || |
| 5278 | ((ctxt->value->type != XPATH_NODESET) && |
| 5279 | (ctxt->value->type != XPATH_XSLT_TREE))) |
| 5280 | XP_ERROR(XPATH_INVALID_TYPE); |
| 5281 | cur = valuePop(ctxt); |
| 5282 | |
| 5283 | if (cur->nodesetval->nodeNr == 0) { |
| 5284 | valuePush(ctxt, xmlXPathNewFloat(0.0)); |
| 5285 | } else { |
| 5286 | valuePush(ctxt, |
| 5287 | xmlXPathNewNodeSet(cur->nodesetval->nodeTab[0])); |
| 5288 | xmlXPathNumberFunction(ctxt, 1); |
| 5289 | for (i = 1; i < cur->nodesetval->nodeNr; i++) { |
| 5290 | valuePush(ctxt, |
| 5291 | xmlXPathNewNodeSet(cur->nodesetval->nodeTab[i])); |
| 5292 | xmlXPathAddValues(ctxt); |
| 5293 | } |
| 5294 | } |
| 5295 | xmlXPathFreeObject(cur); |
| 5296 | } |
| 5297 | |
| 5298 | /** |
| 5299 | * xmlXPathFloorFunction: |
| 5300 | * @ctxt: the XPath Parser context |
| 5301 | * @nargs: the number of arguments |
| 5302 | * |
| 5303 | * Implement the floor() XPath function |
| 5304 | * number floor(number) |
| 5305 | * The floor function returns the largest (closest to positive infinity) |
| 5306 | * number that is not greater than the argument and that is an integer. |
| 5307 | */ |
| 5308 | void |
| 5309 | xmlXPathFloorFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 5310 | CHECK_ARITY(1); |
| 5311 | CAST_TO_NUMBER; |
| 5312 | CHECK_TYPE(XPATH_NUMBER); |
| 5313 | #if 0 |
| 5314 | ctxt->value->floatval = floor(ctxt->value->floatval); |
| 5315 | #else |
| 5316 | /* floor(0.999999999999) => 1.0 !!!!!!!!!!! */ |
| 5317 | ctxt->value->floatval = (double)((int) ctxt->value->floatval); |
| 5318 | #endif |
| 5319 | } |
| 5320 | |
| 5321 | /** |
| 5322 | * xmlXPathCeilingFunction: |
| 5323 | * @ctxt: the XPath Parser context |
| 5324 | * @nargs: the number of arguments |
| 5325 | * |
| 5326 | * Implement the ceiling() XPath function |
| 5327 | * number ceiling(number) |
| 5328 | * The ceiling function returns the smallest (closest to negative infinity) |
| 5329 | * number that is not less than the argument and that is an integer. |
| 5330 | */ |
| 5331 | void |
| 5332 | xmlXPathCeilingFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 5333 | double f; |
| 5334 | |
| 5335 | CHECK_ARITY(1); |
| 5336 | CAST_TO_NUMBER; |
| 5337 | CHECK_TYPE(XPATH_NUMBER); |
| 5338 | |
| 5339 | #if 0 |
| 5340 | ctxt->value->floatval = ceil(ctxt->value->floatval); |
| 5341 | #else |
| 5342 | f = (double)((int) ctxt->value->floatval); |
| 5343 | if (f != ctxt->value->floatval) |
| 5344 | ctxt->value->floatval = f + 1; |
| 5345 | #endif |
| 5346 | } |
| 5347 | |
| 5348 | /** |
| 5349 | * xmlXPathRoundFunction: |
| 5350 | * @ctxt: the XPath Parser context |
| 5351 | * @nargs: the number of arguments |
| 5352 | * |
| 5353 | * Implement the round() XPath function |
| 5354 | * number round(number) |
| 5355 | * The round function returns the number that is closest to the |
| 5356 | * argument and that is an integer. If there are two such numbers, |
| 5357 | * then the one that is even is returned. |
| 5358 | */ |
| 5359 | void |
| 5360 | xmlXPathRoundFunction(xmlXPathParserContextPtr ctxt, int nargs) { |
| 5361 | double f; |
| 5362 | |
| 5363 | CHECK_ARITY(1); |
| 5364 | CAST_TO_NUMBER; |
| 5365 | CHECK_TYPE(XPATH_NUMBER); |
| 5366 | |
| 5367 | if ((ctxt->value->floatval == xmlXPathNAN) || |
| 5368 | (ctxt->value->floatval == xmlXPathPINF) || |
| 5369 | (ctxt->value->floatval == xmlXPathNINF) || |
| 5370 | (ctxt->value->floatval == 0.0)) |
| 5371 | return; |
| 5372 | |
| 5373 | #if 0 |
| 5374 | f = floor(ctxt->value->floatval); |
| 5375 | #else |
| 5376 | f = (double)((int) ctxt->value->floatval); |
| 5377 | #endif |
| 5378 | if (ctxt->value->floatval < f + 0.5) |
| 5379 | ctxt->value->floatval = f; |
| 5380 | else |
| 5381 | ctxt->value->floatval = f + 1; |
| 5382 | } |
| 5383 | |
| 5384 | /************************************************************************ |
| 5385 | * * |
| 5386 | * The Parser * |
| 5387 | * * |
| 5388 | ************************************************************************/ |
| 5389 | |
| 5390 | /* |
| 5391 | * a couple of forward declarations since we use a recursive call based |
| 5392 | * implementation. |
| 5393 | */ |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5394 | static void xmlXPathCompileExpr(xmlXPathParserContextPtr ctxt); |
| 5395 | static void xmlXPathCompPredicate(xmlXPathParserContextPtr ctxt); |
| 5396 | static void xmlXPathCompLocationPath(xmlXPathParserContextPtr ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5397 | #ifdef VMS |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5398 | static void xmlXPathCompRelLocationPath(xmlXPathParserContextPtr ctxt); |
| 5399 | #define xmlXPathCompRelativeLocationPath xmlXPathCompRelLocationPath |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5400 | #else |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5401 | static void xmlXPathCompRelativeLocationPath(xmlXPathParserContextPtr ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5402 | #endif |
| 5403 | |
| 5404 | /** |
| 5405 | * xmlXPathParseNCName: |
| 5406 | * @ctxt: the XPath Parser context |
| 5407 | * |
| 5408 | * parse an XML namespace non qualified name. |
| 5409 | * |
| 5410 | * [NS 3] NCName ::= (Letter | '_') (NCNameChar)* |
| 5411 | * |
| 5412 | * [NS 4] NCNameChar ::= Letter | Digit | '.' | '-' | '_' | |
| 5413 | * CombiningChar | Extender |
| 5414 | * |
| 5415 | * Returns the namespace name or NULL |
| 5416 | */ |
| 5417 | |
| 5418 | xmlChar * |
| 5419 | xmlXPathParseNCName(xmlXPathParserContextPtr ctxt) { |
| 5420 | const xmlChar *q; |
| 5421 | xmlChar *ret = NULL; |
| 5422 | |
| 5423 | if (!IS_LETTER(CUR) && (CUR != '_')) return(NULL); |
| 5424 | q = NEXT; |
| 5425 | |
| 5426 | while ((IS_LETTER(CUR)) || (IS_DIGIT(CUR)) || |
| 5427 | (CUR == '.') || (CUR == '-') || |
| 5428 | (CUR == '_') || |
| 5429 | (IS_COMBINING(CUR)) || |
| 5430 | (IS_EXTENDER(CUR))) |
| 5431 | NEXT; |
| 5432 | |
| 5433 | ret = xmlStrndup(q, CUR_PTR - q); |
| 5434 | |
| 5435 | return(ret); |
| 5436 | } |
| 5437 | |
| 5438 | /** |
| 5439 | * xmlXPathParseQName: |
| 5440 | * @ctxt: the XPath Parser context |
| 5441 | * @prefix: a xmlChar ** |
| 5442 | * |
| 5443 | * parse an XML qualified name |
| 5444 | * |
| 5445 | * [NS 5] QName ::= (Prefix ':')? LocalPart |
| 5446 | * |
| 5447 | * [NS 6] Prefix ::= NCName |
| 5448 | * |
| 5449 | * [NS 7] LocalPart ::= NCName |
| 5450 | * |
| 5451 | * Returns the function returns the local part, and prefix is updated |
| 5452 | * to get the Prefix if any. |
| 5453 | */ |
| 5454 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 5455 | static xmlChar * |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5456 | xmlXPathParseQName(xmlXPathParserContextPtr ctxt, xmlChar **prefix) { |
| 5457 | xmlChar *ret = NULL; |
| 5458 | |
| 5459 | *prefix = NULL; |
| 5460 | ret = xmlXPathParseNCName(ctxt); |
| 5461 | if (CUR == ':') { |
| 5462 | *prefix = ret; |
| 5463 | NEXT; |
| 5464 | ret = xmlXPathParseNCName(ctxt); |
| 5465 | } |
| 5466 | return(ret); |
| 5467 | } |
| 5468 | |
| 5469 | /** |
| 5470 | * xmlXPathParseName: |
| 5471 | * @ctxt: the XPath Parser context |
| 5472 | * |
| 5473 | * parse an XML name |
| 5474 | * |
| 5475 | * [4] NameChar ::= Letter | Digit | '.' | '-' | '_' | ':' | |
| 5476 | * CombiningChar | Extender |
| 5477 | * |
| 5478 | * [5] Name ::= (Letter | '_' | ':') (NameChar)* |
| 5479 | * |
| 5480 | * Returns the namespace name or NULL |
| 5481 | */ |
| 5482 | |
| 5483 | xmlChar * |
| 5484 | xmlXPathParseName(xmlXPathParserContextPtr ctxt) { |
| 5485 | const xmlChar *q; |
| 5486 | xmlChar *ret = NULL; |
| 5487 | |
| 5488 | if (!IS_LETTER(CUR) && (CUR != '_')) return(NULL); |
| 5489 | q = NEXT; |
| 5490 | |
| 5491 | /* TODO Make this UTF8 compliant !!! */ |
| 5492 | while ((IS_LETTER(CUR)) || (IS_DIGIT(CUR)) || |
| 5493 | (CUR == '.') || (CUR == '-') || |
| 5494 | (CUR == '_') || (CUR == ':') || |
| 5495 | (IS_COMBINING(CUR)) || |
| 5496 | (IS_EXTENDER(CUR))) |
| 5497 | NEXT; |
| 5498 | |
| 5499 | ret = xmlStrndup(q, CUR_PTR - q); |
| 5500 | |
| 5501 | return(ret); |
| 5502 | } |
| 5503 | |
| 5504 | /** |
| 5505 | * xmlXPathStringEvalNumber: |
| 5506 | * @str: A string to scan |
| 5507 | * |
| 5508 | * [30] Number ::= Digits ('.' Digits?)? |
| 5509 | * | '.' Digits |
| 5510 | * [31] Digits ::= [0-9]+ |
| 5511 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5512 | * Compile a Number in the string |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5513 | * In complement of the Number expression, this function also handles |
| 5514 | * negative values : '-' Number. |
| 5515 | * |
| 5516 | * Returns the double value. |
| 5517 | */ |
| 5518 | double |
| 5519 | xmlXPathStringEvalNumber(const xmlChar *str) { |
| 5520 | const xmlChar *cur = str; |
| 5521 | double ret = 0.0; |
| 5522 | double mult = 1; |
| 5523 | int ok = 0; |
| 5524 | int isneg = 0; |
| 5525 | |
| 5526 | while (IS_BLANK(*cur)) cur++; |
| 5527 | if ((*cur != '.') && ((*cur < '0') || (*cur > '9')) && (*cur != '-')) { |
| 5528 | return(xmlXPathNAN); |
| 5529 | } |
| 5530 | if (*cur == '-') { |
| 5531 | isneg = 1; |
| 5532 | cur++; |
| 5533 | } |
| 5534 | while ((*cur >= '0') && (*cur <= '9')) { |
| 5535 | ret = ret * 10 + (*cur - '0'); |
| 5536 | ok = 1; |
| 5537 | cur++; |
| 5538 | } |
| 5539 | if (*cur == '.') { |
| 5540 | cur++; |
| 5541 | if (((*cur < '0') || (*cur > '9')) && (!ok)) { |
| 5542 | return(xmlXPathNAN); |
| 5543 | } |
| 5544 | while ((*cur >= '0') && (*cur <= '9')) { |
| 5545 | mult /= 10; |
| 5546 | ret = ret + (*cur - '0') * mult; |
| 5547 | cur++; |
| 5548 | } |
| 5549 | } |
| 5550 | while (IS_BLANK(*cur)) cur++; |
| 5551 | if (*cur != 0) return(xmlXPathNAN); |
| 5552 | if (isneg) ret = -ret; |
| 5553 | return(ret); |
| 5554 | } |
| 5555 | |
| 5556 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5557 | * xmlXPathCompNumber: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5558 | * @ctxt: the XPath Parser context |
| 5559 | * |
| 5560 | * [30] Number ::= Digits ('.' Digits?)? |
| 5561 | * | '.' Digits |
| 5562 | * [31] Digits ::= [0-9]+ |
| 5563 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5564 | * Compile a Number, then push it on the stack |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5565 | * |
| 5566 | */ |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5567 | static void |
| 5568 | xmlXPathCompNumber(xmlXPathParserContextPtr ctxt) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5569 | double ret = 0.0; |
| 5570 | double mult = 1; |
| 5571 | int ok = 0; |
| 5572 | |
| 5573 | CHECK_ERROR; |
| 5574 | if ((CUR != '.') && ((CUR < '0') || (CUR > '9'))) { |
| 5575 | XP_ERROR(XPATH_NUMBER_ERROR); |
| 5576 | } |
| 5577 | while ((CUR >= '0') && (CUR <= '9')) { |
| 5578 | ret = ret * 10 + (CUR - '0'); |
| 5579 | ok = 1; |
| 5580 | NEXT; |
| 5581 | } |
| 5582 | if (CUR == '.') { |
| 5583 | NEXT; |
| 5584 | if (((CUR < '0') || (CUR > '9')) && (!ok)) { |
| 5585 | XP_ERROR(XPATH_NUMBER_ERROR); |
| 5586 | } |
| 5587 | while ((CUR >= '0') && (CUR <= '9')) { |
| 5588 | mult /= 10; |
| 5589 | ret = ret + (CUR - '0') * mult; |
| 5590 | NEXT; |
| 5591 | } |
| 5592 | } |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 5593 | PUSH_LONG_EXPR(XPATH_OP_VALUE, XPATH_NUMBER, 0, 0, |
| 5594 | xmlXPathNewFloat(ret), NULL); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5595 | } |
| 5596 | |
| 5597 | /** |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 5598 | * xmlXPathParseLiteral: |
| 5599 | * @ctxt: the XPath Parser context |
| 5600 | * |
| 5601 | * Parse a Literal |
| 5602 | * |
| 5603 | * [29] Literal ::= '"' [^"]* '"' |
| 5604 | * | "'" [^']* "'" |
| 5605 | * |
| 5606 | * Returns the value found or NULL in case of error |
| 5607 | */ |
| 5608 | static xmlChar * |
| 5609 | xmlXPathParseLiteral(xmlXPathParserContextPtr ctxt) { |
| 5610 | const xmlChar *q; |
| 5611 | xmlChar *ret = NULL; |
| 5612 | |
| 5613 | if (CUR == '"') { |
| 5614 | NEXT; |
| 5615 | q = CUR_PTR; |
| 5616 | while ((IS_CHAR(CUR)) && (CUR != '"')) |
| 5617 | NEXT; |
| 5618 | if (!IS_CHAR(CUR)) { |
| 5619 | XP_ERROR0(XPATH_UNFINISHED_LITERAL_ERROR); |
| 5620 | } else { |
| 5621 | ret = xmlStrndup(q, CUR_PTR - q); |
| 5622 | NEXT; |
| 5623 | } |
| 5624 | } else if (CUR == '\'') { |
| 5625 | NEXT; |
| 5626 | q = CUR_PTR; |
| 5627 | while ((IS_CHAR(CUR)) && (CUR != '\'')) |
| 5628 | NEXT; |
| 5629 | if (!IS_CHAR(CUR)) { |
| 5630 | XP_ERROR0(XPATH_UNFINISHED_LITERAL_ERROR); |
| 5631 | } else { |
| 5632 | ret = xmlStrndup(q, CUR_PTR - q); |
| 5633 | NEXT; |
| 5634 | } |
| 5635 | } else { |
| 5636 | XP_ERROR0(XPATH_START_LITERAL_ERROR); |
| 5637 | } |
| 5638 | return(ret); |
| 5639 | } |
| 5640 | |
| 5641 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5642 | * xmlXPathCompLiteral: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5643 | * @ctxt: the XPath Parser context |
| 5644 | * |
| 5645 | * Parse a Literal and push it on the stack. |
| 5646 | * |
| 5647 | * [29] Literal ::= '"' [^"]* '"' |
| 5648 | * | "'" [^']* "'" |
| 5649 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5650 | * TODO: xmlXPathCompLiteral memory allocation could be improved. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5651 | */ |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5652 | static void |
| 5653 | xmlXPathCompLiteral(xmlXPathParserContextPtr ctxt) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5654 | const xmlChar *q; |
| 5655 | xmlChar *ret = NULL; |
| 5656 | |
| 5657 | if (CUR == '"') { |
| 5658 | NEXT; |
| 5659 | q = CUR_PTR; |
| 5660 | while ((IS_CHAR(CUR)) && (CUR != '"')) |
| 5661 | NEXT; |
| 5662 | if (!IS_CHAR(CUR)) { |
| 5663 | XP_ERROR(XPATH_UNFINISHED_LITERAL_ERROR); |
| 5664 | } else { |
| 5665 | ret = xmlStrndup(q, CUR_PTR - q); |
| 5666 | NEXT; |
| 5667 | } |
| 5668 | } else if (CUR == '\'') { |
| 5669 | NEXT; |
| 5670 | q = CUR_PTR; |
| 5671 | while ((IS_CHAR(CUR)) && (CUR != '\'')) |
| 5672 | NEXT; |
| 5673 | if (!IS_CHAR(CUR)) { |
| 5674 | XP_ERROR(XPATH_UNFINISHED_LITERAL_ERROR); |
| 5675 | } else { |
| 5676 | ret = xmlStrndup(q, CUR_PTR - q); |
| 5677 | NEXT; |
| 5678 | } |
| 5679 | } else { |
| 5680 | XP_ERROR(XPATH_START_LITERAL_ERROR); |
| 5681 | } |
| 5682 | if (ret == NULL) return; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 5683 | PUSH_LONG_EXPR(XPATH_OP_VALUE, XPATH_STRING, 0, 0, |
| 5684 | xmlXPathNewString(ret), NULL); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5685 | xmlFree(ret); |
| 5686 | } |
| 5687 | |
| 5688 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5689 | * xmlXPathCompVariableReference: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5690 | * @ctxt: the XPath Parser context |
| 5691 | * |
| 5692 | * Parse a VariableReference, evaluate it and push it on the stack. |
| 5693 | * |
| 5694 | * The variable bindings consist of a mapping from variable names |
| 5695 | * to variable values. The value of a variable is an object, which |
| 5696 | * of any of the types that are possible for the value of an expression, |
| 5697 | * and may also be of additional types not specified here. |
| 5698 | * |
| 5699 | * Early evaluation is possible since: |
| 5700 | * The variable bindings [...] used to evaluate a subexpression are |
| 5701 | * always the same as those used to evaluate the containing expression. |
| 5702 | * |
| 5703 | * [36] VariableReference ::= '$' QName |
| 5704 | */ |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5705 | static void |
| 5706 | xmlXPathCompVariableReference(xmlXPathParserContextPtr ctxt) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5707 | xmlChar *name; |
| 5708 | xmlChar *prefix; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5709 | |
| 5710 | SKIP_BLANKS; |
| 5711 | if (CUR != '$') { |
| 5712 | XP_ERROR(XPATH_VARIABLE_REF_ERROR); |
| 5713 | } |
| 5714 | NEXT; |
| 5715 | name = xmlXPathParseQName(ctxt, &prefix); |
| 5716 | if (name == NULL) { |
| 5717 | XP_ERROR(XPATH_VARIABLE_REF_ERROR); |
| 5718 | } |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 5719 | ctxt->comp->last = -1; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 5720 | PUSH_LONG_EXPR(XPATH_OP_VARIABLE, 0, 0, 0, |
| 5721 | name, prefix); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5722 | SKIP_BLANKS; |
| 5723 | } |
| 5724 | |
| 5725 | /** |
| 5726 | * xmlXPathIsNodeType: |
| 5727 | * @ctxt: the XPath Parser context |
| 5728 | * @name: a name string |
| 5729 | * |
| 5730 | * Is the name given a NodeType one. |
| 5731 | * |
| 5732 | * [38] NodeType ::= 'comment' |
| 5733 | * | 'text' |
| 5734 | * | 'processing-instruction' |
| 5735 | * | 'node' |
| 5736 | * |
| 5737 | * Returns 1 if true 0 otherwise |
| 5738 | */ |
| 5739 | int |
| 5740 | xmlXPathIsNodeType(const xmlChar *name) { |
| 5741 | if (name == NULL) |
| 5742 | return(0); |
| 5743 | |
| 5744 | if (xmlStrEqual(name, BAD_CAST "comment")) |
| 5745 | return(1); |
| 5746 | if (xmlStrEqual(name, BAD_CAST "text")) |
| 5747 | return(1); |
| 5748 | if (xmlStrEqual(name, BAD_CAST "processing-instruction")) |
| 5749 | return(1); |
| 5750 | if (xmlStrEqual(name, BAD_CAST "node")) |
| 5751 | return(1); |
| 5752 | return(0); |
| 5753 | } |
| 5754 | |
| 5755 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5756 | * xmlXPathCompFunctionCall: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5757 | * @ctxt: the XPath Parser context |
| 5758 | * |
| 5759 | * [16] FunctionCall ::= FunctionName '(' ( Argument ( ',' Argument)*)? ')' |
| 5760 | * [17] Argument ::= Expr |
| 5761 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5762 | * Compile a function call, the evaluation of all arguments are |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5763 | * pushed on the stack |
| 5764 | */ |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5765 | static void |
| 5766 | xmlXPathCompFunctionCall(xmlXPathParserContextPtr ctxt) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5767 | xmlChar *name; |
| 5768 | xmlChar *prefix; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5769 | int nbargs = 0; |
| 5770 | |
| 5771 | name = xmlXPathParseQName(ctxt, &prefix); |
| 5772 | if (name == NULL) { |
| 5773 | XP_ERROR(XPATH_EXPR_ERROR); |
| 5774 | } |
| 5775 | SKIP_BLANKS; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5776 | #ifdef DEBUG_EXPR |
| 5777 | if (prefix == NULL) |
| 5778 | xmlGenericError(xmlGenericErrorContext, "Calling function %s\n", |
| 5779 | name); |
| 5780 | else |
| 5781 | xmlGenericError(xmlGenericErrorContext, "Calling function %s:%s\n", |
| 5782 | prefix, name); |
| 5783 | #endif |
| 5784 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5785 | if (CUR != '(') { |
| 5786 | XP_ERROR(XPATH_EXPR_ERROR); |
| 5787 | } |
| 5788 | NEXT; |
| 5789 | SKIP_BLANKS; |
| 5790 | |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 5791 | ctxt->comp->last = -1; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5792 | while (CUR != ')') { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 5793 | int op1 = ctxt->comp->last; |
| 5794 | ctxt->comp->last = -1; |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5795 | xmlXPathCompileExpr(ctxt); |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 5796 | PUSH_BINARY_EXPR(XPATH_OP_ARG, op1, ctxt->comp->last, 0, 0); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5797 | nbargs++; |
| 5798 | if (CUR == ')') break; |
| 5799 | if (CUR != ',') { |
| 5800 | XP_ERROR(XPATH_EXPR_ERROR); |
| 5801 | } |
| 5802 | NEXT; |
| 5803 | SKIP_BLANKS; |
| 5804 | } |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 5805 | PUSH_LONG_EXPR(XPATH_OP_FUNCTION, nbargs, 0, 0, |
| 5806 | name, prefix); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5807 | NEXT; |
| 5808 | SKIP_BLANKS; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5809 | } |
| 5810 | |
| 5811 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5812 | * xmlXPathCompPrimaryExpr: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5813 | * @ctxt: the XPath Parser context |
| 5814 | * |
| 5815 | * [15] PrimaryExpr ::= VariableReference |
| 5816 | * | '(' Expr ')' |
| 5817 | * | Literal |
| 5818 | * | Number |
| 5819 | * | FunctionCall |
| 5820 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5821 | * Compile a primary expression. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5822 | */ |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5823 | static void |
| 5824 | xmlXPathCompPrimaryExpr(xmlXPathParserContextPtr ctxt) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5825 | SKIP_BLANKS; |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5826 | if (CUR == '$') xmlXPathCompVariableReference(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5827 | else if (CUR == '(') { |
| 5828 | NEXT; |
| 5829 | SKIP_BLANKS; |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5830 | xmlXPathCompileExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5831 | if (CUR != ')') { |
| 5832 | XP_ERROR(XPATH_EXPR_ERROR); |
| 5833 | } |
| 5834 | NEXT; |
| 5835 | SKIP_BLANKS; |
| 5836 | } else if (IS_DIGIT(CUR)) { |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5837 | xmlXPathCompNumber(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5838 | } else if ((CUR == '\'') || (CUR == '"')) { |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5839 | xmlXPathCompLiteral(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5840 | } else { |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5841 | xmlXPathCompFunctionCall(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5842 | } |
| 5843 | SKIP_BLANKS; |
| 5844 | } |
| 5845 | |
| 5846 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5847 | * xmlXPathCompFilterExpr: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5848 | * @ctxt: the XPath Parser context |
| 5849 | * |
| 5850 | * [20] FilterExpr ::= PrimaryExpr |
| 5851 | * | FilterExpr Predicate |
| 5852 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5853 | * Compile a filter expression. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5854 | * Square brackets are used to filter expressions in the same way that |
| 5855 | * they are used in location paths. It is an error if the expression to |
| 5856 | * be filtered does not evaluate to a node-set. The context node list |
| 5857 | * used for evaluating the expression in square brackets is the node-set |
| 5858 | * to be filtered listed in document order. |
| 5859 | */ |
| 5860 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5861 | static void |
| 5862 | xmlXPathCompFilterExpr(xmlXPathParserContextPtr ctxt) { |
| 5863 | xmlXPathCompPrimaryExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5864 | CHECK_ERROR; |
| 5865 | SKIP_BLANKS; |
| 5866 | |
| 5867 | while (CUR == '[') { |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5868 | xmlXPathCompPredicate(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5869 | SKIP_BLANKS; |
| 5870 | } |
| 5871 | |
| 5872 | |
| 5873 | } |
| 5874 | |
| 5875 | /** |
| 5876 | * xmlXPathScanName: |
| 5877 | * @ctxt: the XPath Parser context |
| 5878 | * |
| 5879 | * Trickery: parse an XML name but without consuming the input flow |
| 5880 | * Needed to avoid insanity in the parser state. |
| 5881 | * |
| 5882 | * [4] NameChar ::= Letter | Digit | '.' | '-' | '_' | ':' | |
| 5883 | * CombiningChar | Extender |
| 5884 | * |
| 5885 | * [5] Name ::= (Letter | '_' | ':') (NameChar)* |
| 5886 | * |
| 5887 | * [6] Names ::= Name (S Name)* |
| 5888 | * |
| 5889 | * Returns the Name parsed or NULL |
| 5890 | */ |
| 5891 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 5892 | static xmlChar * |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5893 | xmlXPathScanName(xmlXPathParserContextPtr ctxt) { |
| 5894 | xmlChar buf[XML_MAX_NAMELEN]; |
| 5895 | int len = 0; |
| 5896 | |
| 5897 | SKIP_BLANKS; |
| 5898 | if (!IS_LETTER(CUR) && (CUR != '_') && |
| 5899 | (CUR != ':')) { |
| 5900 | return(NULL); |
| 5901 | } |
| 5902 | |
| 5903 | while ((IS_LETTER(NXT(len))) || (IS_DIGIT(NXT(len))) || |
| 5904 | (NXT(len) == '.') || (NXT(len) == '-') || |
| 5905 | (NXT(len) == '_') || (NXT(len) == ':') || |
| 5906 | (IS_COMBINING(NXT(len))) || |
| 5907 | (IS_EXTENDER(NXT(len)))) { |
| 5908 | buf[len] = NXT(len); |
| 5909 | len++; |
| 5910 | if (len >= XML_MAX_NAMELEN) { |
| 5911 | xmlGenericError(xmlGenericErrorContext, |
| 5912 | "xmlScanName: reached XML_MAX_NAMELEN limit\n"); |
| 5913 | while ((IS_LETTER(NXT(len))) || (IS_DIGIT(NXT(len))) || |
| 5914 | (NXT(len) == '.') || (NXT(len) == '-') || |
| 5915 | (NXT(len) == '_') || (NXT(len) == ':') || |
| 5916 | (IS_COMBINING(NXT(len))) || |
| 5917 | (IS_EXTENDER(NXT(len)))) |
| 5918 | len++; |
| 5919 | break; |
| 5920 | } |
| 5921 | } |
| 5922 | return(xmlStrndup(buf, len)); |
| 5923 | } |
| 5924 | |
| 5925 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5926 | * xmlXPathCompPathExpr: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5927 | * @ctxt: the XPath Parser context |
| 5928 | * |
| 5929 | * [19] PathExpr ::= LocationPath |
| 5930 | * | FilterExpr |
| 5931 | * | FilterExpr '/' RelativeLocationPath |
| 5932 | * | FilterExpr '//' RelativeLocationPath |
| 5933 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5934 | * Compile a path expression. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5935 | * The / operator and // operators combine an arbitrary expression |
| 5936 | * and a relative location path. It is an error if the expression |
| 5937 | * does not evaluate to a node-set. |
| 5938 | * The / operator does composition in the same way as when / is |
| 5939 | * used in a location path. As in location paths, // is short for |
| 5940 | * /descendant-or-self::node()/. |
| 5941 | */ |
| 5942 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 5943 | static void |
| 5944 | xmlXPathCompPathExpr(xmlXPathParserContextPtr ctxt) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 5945 | int lc = 1; /* Should we branch to LocationPath ? */ |
| 5946 | xmlChar *name = NULL; /* we may have to preparse a name to find out */ |
| 5947 | |
| 5948 | SKIP_BLANKS; |
| 5949 | if ((CUR == '$') || (CUR == '(') || (IS_DIGIT(CUR)) || |
| 5950 | (CUR == '\'') || (CUR == '"')) { |
| 5951 | lc = 0; |
| 5952 | } else if (CUR == '*') { |
| 5953 | /* relative or absolute location path */ |
| 5954 | lc = 1; |
| 5955 | } else if (CUR == '/') { |
| 5956 | /* relative or absolute location path */ |
| 5957 | lc = 1; |
| 5958 | } else if (CUR == '@') { |
| 5959 | /* relative abbreviated attribute location path */ |
| 5960 | lc = 1; |
| 5961 | } else if (CUR == '.') { |
| 5962 | /* relative abbreviated attribute location path */ |
| 5963 | lc = 1; |
| 5964 | } else { |
| 5965 | /* |
| 5966 | * Problem is finding if we have a name here whether it's: |
| 5967 | * - a nodetype |
| 5968 | * - a function call in which case it's followed by '(' |
| 5969 | * - an axis in which case it's followed by ':' |
| 5970 | * - a element name |
| 5971 | * We do an a priori analysis here rather than having to |
| 5972 | * maintain parsed token content through the recursive function |
| 5973 | * calls. This looks uglier but makes the code quite easier to |
| 5974 | * read/write/debug. |
| 5975 | */ |
| 5976 | SKIP_BLANKS; |
| 5977 | name = xmlXPathScanName(ctxt); |
| 5978 | if ((name != NULL) && (xmlStrstr(name, (xmlChar *) "::") != NULL)) { |
| 5979 | #ifdef DEBUG_STEP |
| 5980 | xmlGenericError(xmlGenericErrorContext, |
| 5981 | "PathExpr: Axis\n"); |
| 5982 | #endif |
| 5983 | lc = 1; |
| 5984 | xmlFree(name); |
| 5985 | } else if (name != NULL) { |
| 5986 | int len =xmlStrlen(name); |
| 5987 | int blank = 0; |
| 5988 | |
| 5989 | |
| 5990 | while (NXT(len) != 0) { |
| 5991 | if (NXT(len) == '/') { |
| 5992 | /* element name */ |
| 5993 | #ifdef DEBUG_STEP |
| 5994 | xmlGenericError(xmlGenericErrorContext, |
| 5995 | "PathExpr: AbbrRelLocation\n"); |
| 5996 | #endif |
| 5997 | lc = 1; |
| 5998 | break; |
| 5999 | } else if (IS_BLANK(NXT(len))) { |
| 6000 | /* skip to next */ |
| 6001 | blank = 1; |
| 6002 | } else if (NXT(len) == ':') { |
| 6003 | #ifdef DEBUG_STEP |
| 6004 | xmlGenericError(xmlGenericErrorContext, |
| 6005 | "PathExpr: AbbrRelLocation\n"); |
| 6006 | #endif |
| 6007 | lc = 1; |
| 6008 | break; |
| 6009 | } else if ((NXT(len) == '(')) { |
| 6010 | /* Note Type or Function */ |
| 6011 | if (xmlXPathIsNodeType(name)) { |
| 6012 | #ifdef DEBUG_STEP |
| 6013 | xmlGenericError(xmlGenericErrorContext, |
| 6014 | "PathExpr: Type search\n"); |
| 6015 | #endif |
| 6016 | lc = 1; |
| 6017 | } else { |
| 6018 | #ifdef DEBUG_STEP |
| 6019 | xmlGenericError(xmlGenericErrorContext, |
| 6020 | "PathExpr: function call\n"); |
| 6021 | #endif |
| 6022 | lc = 0; |
| 6023 | } |
| 6024 | break; |
| 6025 | } else if ((NXT(len) == '[')) { |
| 6026 | /* element name */ |
| 6027 | #ifdef DEBUG_STEP |
| 6028 | xmlGenericError(xmlGenericErrorContext, |
| 6029 | "PathExpr: AbbrRelLocation\n"); |
| 6030 | #endif |
| 6031 | lc = 1; |
| 6032 | break; |
| 6033 | } else if ((NXT(len) == '<') || (NXT(len) == '>') || |
| 6034 | (NXT(len) == '=')) { |
| 6035 | lc = 1; |
| 6036 | break; |
| 6037 | } else { |
| 6038 | lc = 1; |
| 6039 | break; |
| 6040 | } |
| 6041 | len++; |
| 6042 | } |
| 6043 | if (NXT(len) == 0) { |
| 6044 | #ifdef DEBUG_STEP |
| 6045 | xmlGenericError(xmlGenericErrorContext, |
| 6046 | "PathExpr: AbbrRelLocation\n"); |
| 6047 | #endif |
| 6048 | /* element name */ |
| 6049 | lc = 1; |
| 6050 | } |
| 6051 | xmlFree(name); |
| 6052 | } else { |
| 6053 | /* make sure all cases are covered explicitely */ |
| 6054 | XP_ERROR(XPATH_EXPR_ERROR); |
| 6055 | } |
| 6056 | } |
| 6057 | |
| 6058 | if (lc) { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6059 | if (CUR == '/') { |
| 6060 | PUSH_LEAVE_EXPR(XPATH_OP_ROOT, 0, 0); |
| 6061 | } else { |
| 6062 | PUSH_LEAVE_EXPR(XPATH_OP_NODE, 0, 0); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6063 | } |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6064 | xmlXPathCompLocationPath(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6065 | } else { |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6066 | xmlXPathCompFilterExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6067 | CHECK_ERROR; |
| 6068 | if ((CUR == '/') && (NXT(1) == '/')) { |
| 6069 | SKIP(2); |
| 6070 | SKIP_BLANKS; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6071 | |
| 6072 | PUSH_LONG_EXPR(XPATH_OP_COLLECT, AXIS_DESCENDANT_OR_SELF, |
| 6073 | NODE_TEST_TYPE, NODE_TYPE_NODE, NULL, NULL); |
| 6074 | PUSH_UNARY_EXPR(XPATH_OP_RESET, ctxt->comp->last, 1, 0); |
| 6075 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6076 | xmlXPathCompRelativeLocationPath(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6077 | } else if (CUR == '/') { |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6078 | xmlXPathCompRelativeLocationPath(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6079 | } |
| 6080 | } |
| 6081 | SKIP_BLANKS; |
| 6082 | } |
| 6083 | |
| 6084 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6085 | * xmlXPathCompUnionExpr: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6086 | * @ctxt: the XPath Parser context |
| 6087 | * |
| 6088 | * [18] UnionExpr ::= PathExpr |
| 6089 | * | UnionExpr '|' PathExpr |
| 6090 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6091 | * Compile an union expression. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6092 | */ |
| 6093 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6094 | static void |
| 6095 | xmlXPathCompUnionExpr(xmlXPathParserContextPtr ctxt) { |
| 6096 | xmlXPathCompPathExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6097 | CHECK_ERROR; |
| 6098 | SKIP_BLANKS; |
| 6099 | while (CUR == '|') { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6100 | int op1 = ctxt->comp->last; |
| 6101 | PUSH_LEAVE_EXPR(XPATH_OP_NODE, 0, 0); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6102 | |
| 6103 | NEXT; |
| 6104 | SKIP_BLANKS; |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6105 | xmlXPathCompPathExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6106 | |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6107 | PUSH_BINARY_EXPR(XPATH_OP_UNION, op1, ctxt->comp->last, 0, 0); |
| 6108 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6109 | SKIP_BLANKS; |
| 6110 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6111 | } |
| 6112 | |
| 6113 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6114 | * xmlXPathCompUnaryExpr: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6115 | * @ctxt: the XPath Parser context |
| 6116 | * |
| 6117 | * [27] UnaryExpr ::= UnionExpr |
| 6118 | * | '-' UnaryExpr |
| 6119 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6120 | * Compile an unary expression. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6121 | */ |
| 6122 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6123 | static void |
| 6124 | xmlXPathCompUnaryExpr(xmlXPathParserContextPtr ctxt) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6125 | int minus = 0; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6126 | int found = 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6127 | |
| 6128 | SKIP_BLANKS; |
Daniel Veillard | 68d7b67 | 2001-03-12 18:22:04 +0000 | [diff] [blame] | 6129 | while (CUR == '-') { |
| 6130 | minus = 1 - minus; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6131 | found = 1; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6132 | NEXT; |
| 6133 | SKIP_BLANKS; |
| 6134 | } |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6135 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6136 | xmlXPathCompUnionExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6137 | CHECK_ERROR; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6138 | if (found) { |
| 6139 | if (minus) |
| 6140 | PUSH_UNARY_EXPR(XPATH_OP_PLUS, ctxt->comp->last, 2, 0); |
| 6141 | else |
| 6142 | PUSH_UNARY_EXPR(XPATH_OP_PLUS, ctxt->comp->last, 3, 0); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6143 | } |
| 6144 | } |
| 6145 | |
| 6146 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6147 | * xmlXPathCompMultiplicativeExpr: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6148 | * @ctxt: the XPath Parser context |
| 6149 | * |
| 6150 | * [26] MultiplicativeExpr ::= UnaryExpr |
| 6151 | * | MultiplicativeExpr MultiplyOperator UnaryExpr |
| 6152 | * | MultiplicativeExpr 'div' UnaryExpr |
| 6153 | * | MultiplicativeExpr 'mod' UnaryExpr |
| 6154 | * [34] MultiplyOperator ::= '*' |
| 6155 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6156 | * Compile an Additive expression. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6157 | */ |
| 6158 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6159 | static void |
| 6160 | xmlXPathCompMultiplicativeExpr(xmlXPathParserContextPtr ctxt) { |
| 6161 | xmlXPathCompUnaryExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6162 | CHECK_ERROR; |
| 6163 | SKIP_BLANKS; |
| 6164 | while ((CUR == '*') || |
| 6165 | ((CUR == 'd') && (NXT(1) == 'i') && (NXT(2) == 'v')) || |
| 6166 | ((CUR == 'm') && (NXT(1) == 'o') && (NXT(2) == 'd'))) { |
| 6167 | int op = -1; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6168 | int op1 = ctxt->comp->last; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6169 | |
| 6170 | if (CUR == '*') { |
| 6171 | op = 0; |
| 6172 | NEXT; |
| 6173 | } else if (CUR == 'd') { |
| 6174 | op = 1; |
| 6175 | SKIP(3); |
| 6176 | } else if (CUR == 'm') { |
| 6177 | op = 2; |
| 6178 | SKIP(3); |
| 6179 | } |
| 6180 | SKIP_BLANKS; |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6181 | xmlXPathCompUnaryExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6182 | CHECK_ERROR; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6183 | PUSH_BINARY_EXPR(XPATH_OP_MULT, op1, ctxt->comp->last, op, 0); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6184 | SKIP_BLANKS; |
| 6185 | } |
| 6186 | } |
| 6187 | |
| 6188 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6189 | * xmlXPathCompAdditiveExpr: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6190 | * @ctxt: the XPath Parser context |
| 6191 | * |
| 6192 | * [25] AdditiveExpr ::= MultiplicativeExpr |
| 6193 | * | AdditiveExpr '+' MultiplicativeExpr |
| 6194 | * | AdditiveExpr '-' MultiplicativeExpr |
| 6195 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6196 | * Compile an Additive expression. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6197 | */ |
| 6198 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6199 | static void |
| 6200 | xmlXPathCompAdditiveExpr(xmlXPathParserContextPtr ctxt) { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6201 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6202 | xmlXPathCompMultiplicativeExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6203 | CHECK_ERROR; |
| 6204 | SKIP_BLANKS; |
| 6205 | while ((CUR == '+') || (CUR == '-')) { |
| 6206 | int plus; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6207 | int op1 = ctxt->comp->last; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6208 | |
| 6209 | if (CUR == '+') plus = 1; |
| 6210 | else plus = 0; |
| 6211 | NEXT; |
| 6212 | SKIP_BLANKS; |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6213 | xmlXPathCompMultiplicativeExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6214 | CHECK_ERROR; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6215 | PUSH_BINARY_EXPR(XPATH_OP_PLUS, op1, ctxt->comp->last, plus, 0); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6216 | SKIP_BLANKS; |
| 6217 | } |
| 6218 | } |
| 6219 | |
| 6220 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6221 | * xmlXPathCompRelationalExpr: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6222 | * @ctxt: the XPath Parser context |
| 6223 | * |
| 6224 | * [24] RelationalExpr ::= AdditiveExpr |
| 6225 | * | RelationalExpr '<' AdditiveExpr |
| 6226 | * | RelationalExpr '>' AdditiveExpr |
| 6227 | * | RelationalExpr '<=' AdditiveExpr |
| 6228 | * | RelationalExpr '>=' AdditiveExpr |
| 6229 | * |
| 6230 | * A <= B > C is allowed ? Answer from James, yes with |
| 6231 | * (AdditiveExpr <= AdditiveExpr) > AdditiveExpr |
| 6232 | * which is basically what got implemented. |
| 6233 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6234 | * Compile a Relational expression, then push the result |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6235 | * on the stack |
| 6236 | */ |
| 6237 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6238 | static void |
| 6239 | xmlXPathCompRelationalExpr(xmlXPathParserContextPtr ctxt) { |
| 6240 | xmlXPathCompAdditiveExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6241 | CHECK_ERROR; |
| 6242 | SKIP_BLANKS; |
| 6243 | while ((CUR == '<') || |
| 6244 | (CUR == '>') || |
| 6245 | ((CUR == '<') && (NXT(1) == '=')) || |
| 6246 | ((CUR == '>') && (NXT(1) == '='))) { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6247 | int inf, strict; |
| 6248 | int op1 = ctxt->comp->last; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6249 | |
| 6250 | if (CUR == '<') inf = 1; |
| 6251 | else inf = 0; |
| 6252 | if (NXT(1) == '=') strict = 0; |
| 6253 | else strict = 1; |
| 6254 | NEXT; |
| 6255 | if (!strict) NEXT; |
| 6256 | SKIP_BLANKS; |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6257 | xmlXPathCompAdditiveExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6258 | CHECK_ERROR; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6259 | PUSH_BINARY_EXPR(XPATH_OP_CMP, op1, ctxt->comp->last, inf, strict); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6260 | SKIP_BLANKS; |
| 6261 | } |
| 6262 | } |
| 6263 | |
| 6264 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6265 | * xmlXPathCompEqualityExpr: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6266 | * @ctxt: the XPath Parser context |
| 6267 | * |
| 6268 | * [23] EqualityExpr ::= RelationalExpr |
| 6269 | * | EqualityExpr '=' RelationalExpr |
| 6270 | * | EqualityExpr '!=' RelationalExpr |
| 6271 | * |
| 6272 | * A != B != C is allowed ? Answer from James, yes with |
| 6273 | * (RelationalExpr = RelationalExpr) = RelationalExpr |
| 6274 | * (RelationalExpr != RelationalExpr) != RelationalExpr |
| 6275 | * which is basically what got implemented. |
| 6276 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6277 | * Compile an Equality expression. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6278 | * |
| 6279 | */ |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6280 | static void |
| 6281 | xmlXPathCompEqualityExpr(xmlXPathParserContextPtr ctxt) { |
| 6282 | xmlXPathCompRelationalExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6283 | CHECK_ERROR; |
| 6284 | SKIP_BLANKS; |
| 6285 | while ((CUR == '=') || ((CUR == '!') && (NXT(1) == '='))) { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6286 | int eq; |
| 6287 | int op1 = ctxt->comp->last; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6288 | |
| 6289 | if (CUR == '=') eq = 1; |
| 6290 | else eq = 0; |
| 6291 | NEXT; |
| 6292 | if (!eq) NEXT; |
| 6293 | SKIP_BLANKS; |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6294 | xmlXPathCompRelationalExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6295 | CHECK_ERROR; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6296 | PUSH_BINARY_EXPR(XPATH_OP_EQUAL, op1, ctxt->comp->last, eq, 0); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6297 | SKIP_BLANKS; |
| 6298 | } |
| 6299 | } |
| 6300 | |
| 6301 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6302 | * xmlXPathCompAndExpr: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6303 | * @ctxt: the XPath Parser context |
| 6304 | * |
| 6305 | * [22] AndExpr ::= EqualityExpr |
| 6306 | * | AndExpr 'and' EqualityExpr |
| 6307 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6308 | * Compile an AND expression. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6309 | * |
| 6310 | */ |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6311 | static void |
| 6312 | xmlXPathCompAndExpr(xmlXPathParserContextPtr ctxt) { |
| 6313 | xmlXPathCompEqualityExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6314 | CHECK_ERROR; |
| 6315 | SKIP_BLANKS; |
| 6316 | while ((CUR == 'a') && (NXT(1) == 'n') && (NXT(2) == 'd')) { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6317 | int op1 = ctxt->comp->last; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6318 | SKIP(3); |
| 6319 | SKIP_BLANKS; |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6320 | xmlXPathCompEqualityExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6321 | CHECK_ERROR; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6322 | PUSH_BINARY_EXPR(XPATH_OP_AND, op1, ctxt->comp->last, 0, 0); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6323 | SKIP_BLANKS; |
| 6324 | } |
| 6325 | } |
| 6326 | |
| 6327 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6328 | * xmlXPathCompExpr: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6329 | * @ctxt: the XPath Parser context |
| 6330 | * |
| 6331 | * [14] Expr ::= OrExpr |
| 6332 | * [21] OrExpr ::= AndExpr |
| 6333 | * | OrExpr 'or' AndExpr |
| 6334 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6335 | * Parse and compile an expression |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6336 | */ |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6337 | static void |
| 6338 | xmlXPathCompileExpr(xmlXPathParserContextPtr ctxt) { |
| 6339 | xmlXPathCompAndExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6340 | CHECK_ERROR; |
| 6341 | SKIP_BLANKS; |
| 6342 | while ((CUR == 'o') && (NXT(1) == 'r')) { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6343 | int op1 = ctxt->comp->last; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6344 | SKIP(2); |
| 6345 | SKIP_BLANKS; |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6346 | xmlXPathCompAndExpr(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6347 | CHECK_ERROR; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6348 | PUSH_BINARY_EXPR(XPATH_OP_OR, op1, ctxt->comp->last, 0, 0); |
| 6349 | op1 = ctxt->comp->nbStep; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6350 | SKIP_BLANKS; |
| 6351 | } |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6352 | if (ctxt->comp->steps[ctxt->comp->last].op != XPATH_OP_VALUE) { |
| 6353 | /* more ops could be optimized too */ |
| 6354 | PUSH_UNARY_EXPR(XPATH_OP_SORT, ctxt->comp->last , 0, 0); |
| 6355 | } |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6356 | } |
| 6357 | |
| 6358 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6359 | * xmlXPathCompPredicate: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6360 | * @ctxt: the XPath Parser context |
| 6361 | * |
| 6362 | * [8] Predicate ::= '[' PredicateExpr ']' |
| 6363 | * [9] PredicateExpr ::= Expr |
| 6364 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6365 | * Compile a predicate expression |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6366 | */ |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6367 | static void |
| 6368 | xmlXPathCompPredicate(xmlXPathParserContextPtr ctxt) { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6369 | int op1 = ctxt->comp->last; |
| 6370 | |
| 6371 | SKIP_BLANKS; |
| 6372 | if (CUR != '[') { |
| 6373 | XP_ERROR(XPATH_INVALID_PREDICATE_ERROR); |
| 6374 | } |
| 6375 | NEXT; |
| 6376 | SKIP_BLANKS; |
| 6377 | |
| 6378 | ctxt->comp->last = -1; |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6379 | xmlXPathCompileExpr(ctxt); |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6380 | CHECK_ERROR; |
| 6381 | |
| 6382 | if (CUR != ']') { |
| 6383 | XP_ERROR(XPATH_INVALID_PREDICATE_ERROR); |
| 6384 | } |
| 6385 | |
| 6386 | PUSH_BINARY_EXPR(XPATH_OP_PREDICATE, op1, ctxt->comp->last, 0, 0); |
| 6387 | |
| 6388 | NEXT; |
| 6389 | SKIP_BLANKS; |
| 6390 | } |
| 6391 | |
| 6392 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6393 | * xmlXPathCompNodeTest: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6394 | * @ctxt: the XPath Parser context |
| 6395 | * @test: pointer to a xmlXPathTestVal |
| 6396 | * @type: pointer to a xmlXPathTypeVal |
| 6397 | * @prefix: placeholder for a possible name prefix |
| 6398 | * |
| 6399 | * [7] NodeTest ::= NameTest |
| 6400 | * | NodeType '(' ')' |
| 6401 | * | 'processing-instruction' '(' Literal ')' |
| 6402 | * |
| 6403 | * [37] NameTest ::= '*' |
| 6404 | * | NCName ':' '*' |
| 6405 | * | QName |
| 6406 | * [38] NodeType ::= 'comment' |
| 6407 | * | 'text' |
| 6408 | * | 'processing-instruction' |
| 6409 | * | 'node' |
| 6410 | * |
| 6411 | * Returns the name found and update @test, @type and @prefix appropriately |
| 6412 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 6413 | static xmlChar * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6414 | xmlXPathCompNodeTest(xmlXPathParserContextPtr ctxt, xmlXPathTestVal *test, |
| 6415 | xmlXPathTypeVal *type, const xmlChar **prefix, |
| 6416 | xmlChar *name) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6417 | int blanks; |
| 6418 | |
| 6419 | if ((test == NULL) || (type == NULL) || (prefix == NULL)) { |
| 6420 | STRANGE; |
| 6421 | return(NULL); |
| 6422 | } |
| 6423 | *type = 0; |
| 6424 | *test = 0; |
| 6425 | *prefix = NULL; |
| 6426 | SKIP_BLANKS; |
| 6427 | |
| 6428 | if ((name == NULL) && (CUR == '*')) { |
| 6429 | /* |
| 6430 | * All elements |
| 6431 | */ |
| 6432 | NEXT; |
| 6433 | *test = NODE_TEST_ALL; |
| 6434 | return(NULL); |
| 6435 | } |
| 6436 | |
| 6437 | if (name == NULL) |
| 6438 | name = xmlXPathParseNCName(ctxt); |
| 6439 | if (name == NULL) { |
| 6440 | XP_ERROR0(XPATH_EXPR_ERROR); |
| 6441 | } |
| 6442 | |
| 6443 | blanks = IS_BLANK(CUR); |
| 6444 | SKIP_BLANKS; |
| 6445 | if (CUR == '(') { |
| 6446 | NEXT; |
| 6447 | /* |
| 6448 | * NodeType or PI search |
| 6449 | */ |
| 6450 | if (xmlStrEqual(name, BAD_CAST "comment")) |
| 6451 | *type = NODE_TYPE_COMMENT; |
| 6452 | else if (xmlStrEqual(name, BAD_CAST "node")) |
| 6453 | *type = NODE_TYPE_NODE; |
| 6454 | else if (xmlStrEqual(name, BAD_CAST "processing-instruction")) |
| 6455 | *type = NODE_TYPE_PI; |
| 6456 | else if (xmlStrEqual(name, BAD_CAST "text")) |
| 6457 | *type = NODE_TYPE_TEXT; |
| 6458 | else { |
| 6459 | if (name != NULL) |
| 6460 | xmlFree(name); |
| 6461 | XP_ERROR0(XPATH_EXPR_ERROR); |
| 6462 | } |
| 6463 | |
| 6464 | *test = NODE_TEST_TYPE; |
| 6465 | |
| 6466 | SKIP_BLANKS; |
| 6467 | if (*type == NODE_TYPE_PI) { |
| 6468 | /* |
| 6469 | * Specific case: search a PI by name. |
| 6470 | */ |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6471 | if (name != NULL) |
| 6472 | xmlFree(name); |
| 6473 | |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 6474 | name = xmlXPathParseLiteral(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6475 | CHECK_ERROR 0; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6476 | SKIP_BLANKS; |
| 6477 | } |
| 6478 | if (CUR != ')') { |
| 6479 | if (name != NULL) |
| 6480 | xmlFree(name); |
| 6481 | XP_ERROR0(XPATH_UNCLOSED_ERROR); |
| 6482 | } |
| 6483 | NEXT; |
| 6484 | return(name); |
| 6485 | } |
| 6486 | *test = NODE_TEST_NAME; |
| 6487 | if ((!blanks) && (CUR == ':')) { |
| 6488 | NEXT; |
| 6489 | |
| 6490 | /* |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 6491 | * Since currently the parser context don't have a |
| 6492 | * namespace list associated: |
| 6493 | * The namespace name for this prefix can be computed |
| 6494 | * only at evaluation time. The compilation is done |
| 6495 | * outside of any context. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6496 | */ |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 6497 | #if 0 |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6498 | *prefix = xmlXPathNsLookup(ctxt->context, name); |
| 6499 | if (name != NULL) |
| 6500 | xmlFree(name); |
| 6501 | if (*prefix == NULL) { |
| 6502 | XP_ERROR0(XPATH_UNDEF_PREFIX_ERROR); |
| 6503 | } |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 6504 | #else |
| 6505 | *prefix = name; |
| 6506 | #endif |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6507 | |
| 6508 | if (CUR == '*') { |
| 6509 | /* |
| 6510 | * All elements |
| 6511 | */ |
| 6512 | NEXT; |
| 6513 | *test = NODE_TEST_ALL; |
| 6514 | return(NULL); |
| 6515 | } |
| 6516 | |
| 6517 | name = xmlXPathParseNCName(ctxt); |
| 6518 | if (name == NULL) { |
| 6519 | XP_ERROR0(XPATH_EXPR_ERROR); |
| 6520 | } |
| 6521 | } |
| 6522 | return(name); |
| 6523 | } |
| 6524 | |
| 6525 | /** |
| 6526 | * xmlXPathIsAxisName: |
| 6527 | * @name: a preparsed name token |
| 6528 | * |
| 6529 | * [6] AxisName ::= 'ancestor' |
| 6530 | * | 'ancestor-or-self' |
| 6531 | * | 'attribute' |
| 6532 | * | 'child' |
| 6533 | * | 'descendant' |
| 6534 | * | 'descendant-or-self' |
| 6535 | * | 'following' |
| 6536 | * | 'following-sibling' |
| 6537 | * | 'namespace' |
| 6538 | * | 'parent' |
| 6539 | * | 'preceding' |
| 6540 | * | 'preceding-sibling' |
| 6541 | * | 'self' |
| 6542 | * |
| 6543 | * Returns the axis or 0 |
| 6544 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 6545 | static xmlXPathAxisVal |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6546 | xmlXPathIsAxisName(const xmlChar *name) { |
| 6547 | xmlXPathAxisVal ret = 0; |
| 6548 | switch (name[0]) { |
| 6549 | case 'a': |
| 6550 | if (xmlStrEqual(name, BAD_CAST "ancestor")) |
| 6551 | ret = AXIS_ANCESTOR; |
| 6552 | if (xmlStrEqual(name, BAD_CAST "ancestor-or-self")) |
| 6553 | ret = AXIS_ANCESTOR_OR_SELF; |
| 6554 | if (xmlStrEqual(name, BAD_CAST "attribute")) |
| 6555 | ret = AXIS_ATTRIBUTE; |
| 6556 | break; |
| 6557 | case 'c': |
| 6558 | if (xmlStrEqual(name, BAD_CAST "child")) |
| 6559 | ret = AXIS_CHILD; |
| 6560 | break; |
| 6561 | case 'd': |
| 6562 | if (xmlStrEqual(name, BAD_CAST "descendant")) |
| 6563 | ret = AXIS_DESCENDANT; |
| 6564 | if (xmlStrEqual(name, BAD_CAST "descendant-or-self")) |
| 6565 | ret = AXIS_DESCENDANT_OR_SELF; |
| 6566 | break; |
| 6567 | case 'f': |
| 6568 | if (xmlStrEqual(name, BAD_CAST "following")) |
| 6569 | ret = AXIS_FOLLOWING; |
| 6570 | if (xmlStrEqual(name, BAD_CAST "following-sibling")) |
| 6571 | ret = AXIS_FOLLOWING_SIBLING; |
| 6572 | break; |
| 6573 | case 'n': |
| 6574 | if (xmlStrEqual(name, BAD_CAST "namespace")) |
| 6575 | ret = AXIS_NAMESPACE; |
| 6576 | break; |
| 6577 | case 'p': |
| 6578 | if (xmlStrEqual(name, BAD_CAST "parent")) |
| 6579 | ret = AXIS_PARENT; |
| 6580 | if (xmlStrEqual(name, BAD_CAST "preceding")) |
| 6581 | ret = AXIS_PRECEDING; |
| 6582 | if (xmlStrEqual(name, BAD_CAST "preceding-sibling")) |
| 6583 | ret = AXIS_PRECEDING_SIBLING; |
| 6584 | break; |
| 6585 | case 's': |
| 6586 | if (xmlStrEqual(name, BAD_CAST "self")) |
| 6587 | ret = AXIS_SELF; |
| 6588 | break; |
| 6589 | } |
| 6590 | return(ret); |
| 6591 | } |
| 6592 | |
| 6593 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6594 | * xmlXPathCompStep: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6595 | * @ctxt: the XPath Parser context |
| 6596 | * |
| 6597 | * [4] Step ::= AxisSpecifier NodeTest Predicate* |
| 6598 | * | AbbreviatedStep |
| 6599 | * |
| 6600 | * [12] AbbreviatedStep ::= '.' | '..' |
| 6601 | * |
| 6602 | * [5] AxisSpecifier ::= AxisName '::' |
| 6603 | * | AbbreviatedAxisSpecifier |
| 6604 | * |
| 6605 | * [13] AbbreviatedAxisSpecifier ::= '@'? |
| 6606 | * |
| 6607 | * Modified for XPtr range support as: |
| 6608 | * |
| 6609 | * [4xptr] Step ::= AxisSpecifier NodeTest Predicate* |
| 6610 | * | AbbreviatedStep |
| 6611 | * | 'range-to' '(' Expr ')' Predicate* |
| 6612 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6613 | * Compile one step in a Location Path |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6614 | * A location step of . is short for self::node(). This is |
| 6615 | * particularly useful in conjunction with //. For example, the |
| 6616 | * location path .//para is short for |
| 6617 | * self::node()/descendant-or-self::node()/child::para |
| 6618 | * and so will select all para descendant elements of the context |
| 6619 | * node. |
| 6620 | * Similarly, a location step of .. is short for parent::node(). |
| 6621 | * For example, ../title is short for parent::node()/child::title |
| 6622 | * and so will select the title children of the parent of the context |
| 6623 | * node. |
| 6624 | */ |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6625 | static void |
| 6626 | xmlXPathCompStep(xmlXPathParserContextPtr ctxt) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6627 | SKIP_BLANKS; |
| 6628 | if ((CUR == '.') && (NXT(1) == '.')) { |
| 6629 | SKIP(2); |
| 6630 | SKIP_BLANKS; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6631 | PUSH_LONG_EXPR(XPATH_OP_COLLECT, AXIS_PARENT, |
| 6632 | NODE_TEST_TYPE, NODE_TYPE_NODE, NULL, NULL); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6633 | } else if (CUR == '.') { |
| 6634 | NEXT; |
| 6635 | SKIP_BLANKS; |
| 6636 | } else { |
| 6637 | xmlChar *name = NULL; |
| 6638 | const xmlChar *prefix = NULL; |
| 6639 | xmlXPathTestVal test; |
| 6640 | xmlXPathAxisVal axis; |
| 6641 | xmlXPathTypeVal type; |
| 6642 | |
| 6643 | /* |
| 6644 | * The modification needed for XPointer change to the production |
| 6645 | */ |
| 6646 | #ifdef LIBXML_XPTR_ENABLED |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 6647 | if (ctxt->xptr) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6648 | name = xmlXPathParseNCName(ctxt); |
| 6649 | if ((name != NULL) && (xmlStrEqual(name, BAD_CAST "range-to"))) { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6650 | int op1 = ctxt->comp->last; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6651 | xmlFree(name); |
| 6652 | SKIP_BLANKS; |
| 6653 | if (CUR != '(') { |
| 6654 | XP_ERROR(XPATH_EXPR_ERROR); |
| 6655 | } |
| 6656 | NEXT; |
| 6657 | SKIP_BLANKS; |
| 6658 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6659 | xmlXPathCompileExpr(ctxt); |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6660 | PUSH_BINARY_EXPR(XPATH_OP_RANGETO, op1, ctxt->comp->last, 0, 0); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6661 | CHECK_ERROR; |
| 6662 | |
| 6663 | SKIP_BLANKS; |
| 6664 | if (CUR != ')') { |
| 6665 | XP_ERROR(XPATH_EXPR_ERROR); |
| 6666 | } |
| 6667 | NEXT; |
| 6668 | goto eval_predicates; |
| 6669 | } |
| 6670 | } |
| 6671 | #endif |
| 6672 | if (name == NULL) |
| 6673 | name = xmlXPathParseNCName(ctxt); |
| 6674 | if (name != NULL) { |
| 6675 | axis = xmlXPathIsAxisName(name); |
| 6676 | if (axis != 0) { |
| 6677 | SKIP_BLANKS; |
| 6678 | if ((CUR == ':') && (NXT(1) == ':')) { |
| 6679 | SKIP(2); |
| 6680 | xmlFree(name); |
| 6681 | name = NULL; |
| 6682 | } else { |
| 6683 | /* an element name can conflict with an axis one :-\ */ |
| 6684 | axis = AXIS_CHILD; |
| 6685 | } |
| 6686 | } else { |
| 6687 | axis = AXIS_CHILD; |
| 6688 | } |
| 6689 | } else if (CUR == '@') { |
| 6690 | NEXT; |
| 6691 | axis = AXIS_ATTRIBUTE; |
| 6692 | } else { |
| 6693 | axis = AXIS_CHILD; |
| 6694 | } |
| 6695 | |
| 6696 | CHECK_ERROR; |
| 6697 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6698 | name = xmlXPathCompNodeTest(ctxt, &test, &type, &prefix, name); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6699 | if (test == 0) |
| 6700 | return; |
| 6701 | |
| 6702 | #ifdef DEBUG_STEP |
| 6703 | xmlGenericError(xmlGenericErrorContext, |
| 6704 | "Basis : computing new set\n"); |
| 6705 | #endif |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6706 | |
| 6707 | PUSH_LONG_EXPR(XPATH_OP_COLLECT, axis, test, type, |
| 6708 | (void *)prefix, (void *)name); |
| 6709 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6710 | #ifdef DEBUG_STEP |
| 6711 | xmlGenericError(xmlGenericErrorContext, "Basis : "); |
| 6712 | xmlGenericErrorContextNodeSet(stdout, ctxt->value->nodesetval); |
| 6713 | #endif |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6714 | |
| 6715 | eval_predicates: |
| 6716 | SKIP_BLANKS; |
| 6717 | while (CUR == '[') { |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6718 | xmlXPathCompPredicate(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6719 | } |
| 6720 | } |
| 6721 | #ifdef DEBUG_STEP |
| 6722 | xmlGenericError(xmlGenericErrorContext, "Step : "); |
| 6723 | xmlGenericErrorContextNodeSet(xmlGenericErrorContext, |
| 6724 | ctxt->value->nodesetval); |
| 6725 | #endif |
| 6726 | } |
| 6727 | |
| 6728 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6729 | * xmlXPathCompRelativeLocationPath: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6730 | * @ctxt: the XPath Parser context |
| 6731 | * |
| 6732 | * [3] RelativeLocationPath ::= Step |
| 6733 | * | RelativeLocationPath '/' Step |
| 6734 | * | AbbreviatedRelativeLocationPath |
| 6735 | * [11] AbbreviatedRelativeLocationPath ::= RelativeLocationPath '//' Step |
| 6736 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6737 | * Compile a relative location path. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6738 | */ |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6739 | static void |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6740 | #ifdef VMS |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6741 | xmlXPathCompRelLocationPath |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6742 | #else |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6743 | xmlXPathCompRelativeLocationPath |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6744 | #endif |
| 6745 | (xmlXPathParserContextPtr ctxt) { |
| 6746 | SKIP_BLANKS; |
| 6747 | if ((CUR == '/') && (NXT(1) == '/')) { |
| 6748 | SKIP(2); |
| 6749 | SKIP_BLANKS; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6750 | PUSH_LONG_EXPR(XPATH_OP_COLLECT, AXIS_DESCENDANT_OR_SELF, |
| 6751 | NODE_TEST_TYPE, NODE_TYPE_NODE, NULL, NULL); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6752 | } else if (CUR == '/') { |
| 6753 | NEXT; |
| 6754 | SKIP_BLANKS; |
| 6755 | } |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6756 | xmlXPathCompStep(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6757 | SKIP_BLANKS; |
| 6758 | while (CUR == '/') { |
| 6759 | if ((CUR == '/') && (NXT(1) == '/')) { |
| 6760 | SKIP(2); |
| 6761 | SKIP_BLANKS; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6762 | PUSH_LONG_EXPR(XPATH_OP_COLLECT, AXIS_DESCENDANT_OR_SELF, |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6763 | NODE_TEST_TYPE, NODE_TYPE_NODE, NULL, NULL); |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6764 | xmlXPathCompStep(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6765 | } else if (CUR == '/') { |
| 6766 | NEXT; |
| 6767 | SKIP_BLANKS; |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6768 | xmlXPathCompStep(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6769 | } |
| 6770 | SKIP_BLANKS; |
| 6771 | } |
| 6772 | } |
| 6773 | |
| 6774 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6775 | * xmlXPathCompLocationPath: |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6776 | * @ctxt: the XPath Parser context |
| 6777 | * |
| 6778 | * [1] LocationPath ::= RelativeLocationPath |
| 6779 | * | AbsoluteLocationPath |
| 6780 | * [2] AbsoluteLocationPath ::= '/' RelativeLocationPath? |
| 6781 | * | AbbreviatedAbsoluteLocationPath |
| 6782 | * [10] AbbreviatedAbsoluteLocationPath ::= |
| 6783 | * '//' RelativeLocationPath |
| 6784 | * |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6785 | * Compile a location path |
| 6786 | * |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6787 | * // is short for /descendant-or-self::node()/. For example, |
| 6788 | * //para is short for /descendant-or-self::node()/child::para and |
| 6789 | * so will select any para element in the document (even a para element |
| 6790 | * that is a document element will be selected by //para since the |
| 6791 | * document element node is a child of the root node); div//para is |
| 6792 | * short for div/descendant-or-self::node()/child::para and so will |
| 6793 | * select all para descendants of div children. |
| 6794 | */ |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6795 | static void |
| 6796 | xmlXPathCompLocationPath(xmlXPathParserContextPtr ctxt) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6797 | SKIP_BLANKS; |
| 6798 | if (CUR != '/') { |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6799 | xmlXPathCompRelativeLocationPath(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6800 | } else { |
| 6801 | while (CUR == '/') { |
| 6802 | if ((CUR == '/') && (NXT(1) == '/')) { |
| 6803 | SKIP(2); |
| 6804 | SKIP_BLANKS; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6805 | PUSH_LONG_EXPR(XPATH_OP_COLLECT, AXIS_DESCENDANT_OR_SELF, |
| 6806 | NODE_TEST_TYPE, NODE_TYPE_NODE, NULL, NULL); |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6807 | xmlXPathCompRelativeLocationPath(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6808 | } else if (CUR == '/') { |
| 6809 | NEXT; |
| 6810 | SKIP_BLANKS; |
| 6811 | if (CUR != 0) |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 6812 | xmlXPathCompRelativeLocationPath(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6813 | } |
| 6814 | } |
| 6815 | } |
| 6816 | } |
| 6817 | |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6818 | /************************************************************************ |
| 6819 | * * |
| 6820 | * XPath precompiled expression evaluation * |
| 6821 | * * |
| 6822 | ************************************************************************/ |
| 6823 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 6824 | /** |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6825 | * xmlXPathCompOpEval: |
| 6826 | * @ctxt: the XPath parser context with the compiled expression |
| 6827 | * @op: an XPath compiled operation |
| 6828 | * |
| 6829 | * Evaluate the Precompiled XPath operation |
| 6830 | */ |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 6831 | static void |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 6832 | xmlXPathCompOpEval(xmlXPathParserContextPtr ctxt, xmlXPathStepOpPtr op) { |
| 6833 | int equal, ret; |
| 6834 | xmlXPathCompExprPtr comp; |
| 6835 | xmlXPathObjectPtr arg1, arg2; |
| 6836 | |
| 6837 | comp = ctxt->comp; |
| 6838 | switch (op->op) { |
| 6839 | case XPATH_OP_END: |
| 6840 | return; |
| 6841 | case XPATH_OP_AND: |
| 6842 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 6843 | xmlXPathBooleanFunction(ctxt, 1); |
| 6844 | if (ctxt->value->boolval == 0) |
| 6845 | return; |
| 6846 | arg2 = valuePop(ctxt); |
| 6847 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); |
| 6848 | xmlXPathBooleanFunction(ctxt, 1); |
| 6849 | arg1 = valuePop(ctxt); |
| 6850 | arg1->boolval &= arg2->boolval; |
| 6851 | valuePush(ctxt, arg1); |
| 6852 | xmlXPathFreeObject(arg2); |
| 6853 | return; |
| 6854 | case XPATH_OP_OR: |
| 6855 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 6856 | xmlXPathBooleanFunction(ctxt, 1); |
| 6857 | if (ctxt->value->boolval == 1) |
| 6858 | return; |
| 6859 | arg2 = valuePop(ctxt); |
| 6860 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); |
| 6861 | xmlXPathBooleanFunction(ctxt, 1); |
| 6862 | arg1 = valuePop(ctxt); |
| 6863 | arg1->boolval |= arg2->boolval; |
| 6864 | valuePush(ctxt, arg1); |
| 6865 | xmlXPathFreeObject(arg2); |
| 6866 | return; |
| 6867 | case XPATH_OP_EQUAL: |
| 6868 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 6869 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); |
| 6870 | equal = xmlXPathEqualValues(ctxt); |
| 6871 | if (op->value) valuePush(ctxt, xmlXPathNewBoolean(equal)); |
| 6872 | else valuePush(ctxt, xmlXPathNewBoolean(!equal)); |
| 6873 | return; |
| 6874 | case XPATH_OP_CMP: |
| 6875 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 6876 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); |
| 6877 | ret = xmlXPathCompareValues(ctxt, op->value, op->value2); |
| 6878 | valuePush(ctxt, xmlXPathNewBoolean(ret)); |
| 6879 | return; |
| 6880 | case XPATH_OP_PLUS: |
| 6881 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 6882 | if (op->ch2 != -1) |
| 6883 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); |
| 6884 | if (op->value == 0) xmlXPathSubValues(ctxt); |
| 6885 | else if (op->value == 1) xmlXPathAddValues(ctxt); |
| 6886 | else if (op->value == 2) xmlXPathValueFlipSign(ctxt); |
| 6887 | else if (op->value == 3) { |
| 6888 | xmlXPathObjectPtr arg; |
| 6889 | |
| 6890 | POP_FLOAT |
| 6891 | valuePush(ctxt, arg); |
| 6892 | } |
| 6893 | return; |
| 6894 | case XPATH_OP_MULT: |
| 6895 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 6896 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); |
| 6897 | if (op->value == 0) xmlXPathMultValues(ctxt); |
| 6898 | else if (op->value == 1) xmlXPathDivValues(ctxt); |
| 6899 | else if (op->value == 2) xmlXPathModValues(ctxt); |
| 6900 | return; |
| 6901 | case XPATH_OP_UNION: |
| 6902 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 6903 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); |
| 6904 | CHECK_TYPE(XPATH_NODESET); |
| 6905 | arg2 = valuePop(ctxt); |
| 6906 | |
| 6907 | CHECK_TYPE(XPATH_NODESET); |
| 6908 | arg1 = valuePop(ctxt); |
| 6909 | |
| 6910 | arg1->nodesetval = xmlXPathNodeSetMerge(arg1->nodesetval, |
| 6911 | arg2->nodesetval); |
| 6912 | valuePush(ctxt, arg1); |
| 6913 | xmlXPathFreeObject(arg2); |
| 6914 | return; |
| 6915 | case XPATH_OP_ROOT: |
| 6916 | xmlXPathRoot(ctxt); |
| 6917 | return; |
| 6918 | case XPATH_OP_NODE: |
| 6919 | if (op->ch1 != -1) |
| 6920 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 6921 | if (op->ch2 != -1) |
| 6922 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); |
| 6923 | valuePush(ctxt, xmlXPathNewNodeSet(ctxt->context->node)); |
| 6924 | return; |
| 6925 | case XPATH_OP_RESET: |
| 6926 | if (op->ch1 != -1) |
| 6927 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 6928 | if (op->ch2 != -1) |
| 6929 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); |
| 6930 | ctxt->context->node = NULL; |
| 6931 | return; |
| 6932 | case XPATH_OP_COLLECT: |
| 6933 | if (op->ch1 != -1) |
| 6934 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 6935 | xmlXPathNodeCollectAndTest(ctxt, op->value, op->value2, |
| 6936 | op->value3, op->value4, op->value5); |
| 6937 | return; |
| 6938 | case XPATH_OP_VALUE: |
| 6939 | valuePush(ctxt, |
| 6940 | xmlXPathObjectCopy((xmlXPathObjectPtr) op->value4)); |
| 6941 | return; |
| 6942 | case XPATH_OP_VARIABLE: { |
| 6943 | if (op->ch1 != -1) |
| 6944 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 6945 | if (op->value5 == NULL) |
| 6946 | valuePush(ctxt, |
| 6947 | xmlXPathVariableLookup(ctxt->context, op->value4)); |
| 6948 | else { |
| 6949 | const xmlChar *URI; |
| 6950 | URI = xmlXPathNsLookup(ctxt->context, op->value5); |
| 6951 | if (URI == NULL) { |
| 6952 | xmlGenericError(xmlGenericErrorContext, |
| 6953 | "xmlXPathRunEval: variable %s bound to undefined prefix %s\n", |
| 6954 | op->value4, op->value5); |
| 6955 | return; |
| 6956 | } |
| 6957 | valuePush(ctxt, |
| 6958 | xmlXPathVariableLookupNS(ctxt->context, |
| 6959 | op->value4, URI)); |
| 6960 | } |
| 6961 | return; |
| 6962 | } |
| 6963 | case XPATH_OP_FUNCTION: { |
| 6964 | xmlXPathFunction func; |
| 6965 | |
| 6966 | if (op->ch1 != -1) |
| 6967 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 6968 | if (op->value5 == NULL) |
| 6969 | func = xmlXPathFunctionLookup(ctxt->context, op->value4); |
| 6970 | else { |
| 6971 | const xmlChar *URI; |
| 6972 | URI = xmlXPathNsLookup(ctxt->context, op->value5); |
| 6973 | if (URI == NULL) { |
| 6974 | xmlGenericError(xmlGenericErrorContext, |
| 6975 | "xmlXPathRunEval: function %s bound to undefined prefix %s\n", |
| 6976 | op->value4, op->value5); |
| 6977 | return; |
| 6978 | } |
| 6979 | func = xmlXPathFunctionLookupNS(ctxt->context, |
| 6980 | op->value4, URI); |
| 6981 | } |
| 6982 | if (func == NULL) { |
| 6983 | xmlGenericError(xmlGenericErrorContext, |
| 6984 | "xmlXPathRunEval: function %s not found\n", |
| 6985 | op->value4); |
| 6986 | XP_ERROR(XPATH_UNKNOWN_FUNC_ERROR); |
| 6987 | return; |
| 6988 | } |
| 6989 | func(ctxt, op->value); |
| 6990 | return; |
| 6991 | } |
| 6992 | case XPATH_OP_ARG: |
| 6993 | if (op->ch1 != -1) |
| 6994 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 6995 | if (op->ch2 != -1) |
| 6996 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); |
| 6997 | return; |
| 6998 | case XPATH_OP_PREDICATE: { |
| 6999 | xmlXPathObjectPtr res; |
| 7000 | xmlXPathObjectPtr obj, tmp; |
| 7001 | xmlNodeSetPtr newset = NULL; |
| 7002 | xmlNodeSetPtr oldset; |
| 7003 | xmlNodePtr oldnode; |
| 7004 | int i; |
| 7005 | |
| 7006 | if (op->ch1 != -1) |
| 7007 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 7008 | if (op->ch2 == -1) |
| 7009 | return; |
| 7010 | |
| 7011 | oldnode = ctxt->context->node; |
| 7012 | |
| 7013 | #ifdef LIBXML_XPTR_ENABLED |
| 7014 | /* |
| 7015 | * Hum are we filtering the result of an XPointer expression |
| 7016 | */ |
| 7017 | if (ctxt->value->type == XPATH_LOCATIONSET) { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 7018 | xmlLocationSetPtr newlocset = NULL; |
| 7019 | xmlLocationSetPtr oldlocset; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7020 | |
| 7021 | /* |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 7022 | * Extract the old locset, and then evaluate the result of the |
| 7023 | * expression for all the element in the locset. use it to grow |
| 7024 | * up a new locset. |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7025 | */ |
| 7026 | CHECK_TYPE(XPATH_LOCATIONSET); |
| 7027 | obj = valuePop(ctxt); |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 7028 | oldlocset = obj->user; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7029 | ctxt->context->node = NULL; |
| 7030 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 7031 | if ((oldlocset == NULL) || (oldlocset->locNr == 0)) { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7032 | ctxt->context->contextSize = 0; |
| 7033 | ctxt->context->proximityPosition = 0; |
| 7034 | if (op->ch2 != -1) |
| 7035 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); |
| 7036 | res = valuePop(ctxt); |
| 7037 | if (res != NULL) |
| 7038 | xmlXPathFreeObject(res); |
| 7039 | valuePush(ctxt, obj); |
| 7040 | CHECK_ERROR; |
| 7041 | return; |
| 7042 | } |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 7043 | newlocset = xmlXPtrLocationSetCreate(NULL); |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7044 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 7045 | for (i = 0; i < oldlocset->locNr; i++) { |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7046 | /* |
| 7047 | * Run the evaluation with a node list made of a |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 7048 | * single item in the nodelocset. |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7049 | */ |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 7050 | ctxt->context->node = oldlocset->locTab[i]->user; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7051 | tmp = xmlXPathNewNodeSet(ctxt->context->node); |
| 7052 | valuePush(ctxt, tmp); |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 7053 | ctxt->context->contextSize = oldlocset->locNr; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7054 | ctxt->context->proximityPosition = i + 1; |
| 7055 | |
| 7056 | if (op->ch2 != -1) |
| 7057 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); |
| 7058 | CHECK_ERROR; |
| 7059 | |
| 7060 | /* |
| 7061 | * The result of the evaluation need to be tested to |
| 7062 | * decided whether the filter succeeded or not |
| 7063 | */ |
| 7064 | res = valuePop(ctxt); |
| 7065 | if (xmlXPathEvaluatePredicateResult(ctxt, res)) { |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 7066 | xmlXPtrLocationSetAdd(newlocset, |
| 7067 | xmlXPathObjectCopy(oldlocset->locTab[i])); |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7068 | } |
| 7069 | |
| 7070 | /* |
| 7071 | * Cleanup |
| 7072 | */ |
| 7073 | if (res != NULL) |
| 7074 | xmlXPathFreeObject(res); |
| 7075 | if (ctxt->value == tmp) { |
| 7076 | res = valuePop(ctxt); |
| 7077 | xmlXPathFreeObject(res); |
| 7078 | } |
| 7079 | |
| 7080 | ctxt->context->node = NULL; |
| 7081 | } |
| 7082 | |
| 7083 | /* |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 7084 | * The result is used as the new evaluation locset. |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7085 | */ |
| 7086 | xmlXPathFreeObject(obj); |
| 7087 | ctxt->context->node = NULL; |
| 7088 | ctxt->context->contextSize = -1; |
| 7089 | ctxt->context->proximityPosition = -1; |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 7090 | valuePush(ctxt, xmlXPtrWrapLocationSet(newlocset)); |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7091 | ctxt->context->node = oldnode; |
| 7092 | return; |
| 7093 | } |
| 7094 | #endif /* LIBXML_XPTR_ENABLED */ |
| 7095 | |
| 7096 | /* |
| 7097 | * Extract the old set, and then evaluate the result of the |
| 7098 | * expression for all the element in the set. use it to grow |
| 7099 | * up a new set. |
| 7100 | */ |
| 7101 | CHECK_TYPE(XPATH_NODESET); |
| 7102 | obj = valuePop(ctxt); |
| 7103 | oldset = obj->nodesetval; |
| 7104 | oldnode = ctxt->context->node; |
| 7105 | ctxt->context->node = NULL; |
| 7106 | |
| 7107 | if ((oldset == NULL) || (oldset->nodeNr == 0)) { |
| 7108 | ctxt->context->contextSize = 0; |
| 7109 | ctxt->context->proximityPosition = 0; |
| 7110 | if (op->ch2 != -1) |
| 7111 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); |
| 7112 | res = valuePop(ctxt); |
| 7113 | if (res != NULL) |
| 7114 | xmlXPathFreeObject(res); |
| 7115 | valuePush(ctxt, obj); |
| 7116 | CHECK_ERROR; |
| 7117 | } else { |
| 7118 | /* |
| 7119 | * Initialize the new set. |
| 7120 | */ |
| 7121 | newset = xmlXPathNodeSetCreate(NULL); |
| 7122 | |
| 7123 | for (i = 0; i < oldset->nodeNr; i++) { |
| 7124 | /* |
| 7125 | * Run the evaluation with a node list made of |
| 7126 | * a single item in the nodeset. |
| 7127 | */ |
| 7128 | ctxt->context->node = oldset->nodeTab[i]; |
| 7129 | tmp = xmlXPathNewNodeSet(ctxt->context->node); |
| 7130 | valuePush(ctxt, tmp); |
| 7131 | ctxt->context->contextSize = oldset->nodeNr; |
| 7132 | ctxt->context->proximityPosition = i + 1; |
| 7133 | |
| 7134 | if (op->ch2 != -1) |
| 7135 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); |
| 7136 | CHECK_ERROR; |
| 7137 | |
| 7138 | /* |
| 7139 | * The result of the evaluation need to be tested to |
| 7140 | * decided whether the filter succeeded or not |
| 7141 | */ |
| 7142 | res = valuePop(ctxt); |
| 7143 | if (xmlXPathEvaluatePredicateResult(ctxt, res)) { |
| 7144 | xmlXPathNodeSetAdd(newset, oldset->nodeTab[i]); |
| 7145 | } |
| 7146 | |
| 7147 | /* |
| 7148 | * Cleanup |
| 7149 | */ |
| 7150 | if (res != NULL) |
| 7151 | xmlXPathFreeObject(res); |
| 7152 | if (ctxt->value == tmp) { |
| 7153 | res = valuePop(ctxt); |
| 7154 | xmlXPathFreeObject(res); |
| 7155 | } |
| 7156 | |
| 7157 | ctxt->context->node = NULL; |
| 7158 | } |
| 7159 | |
| 7160 | /* |
| 7161 | * The result is used as the new evaluation set. |
| 7162 | */ |
| 7163 | xmlXPathFreeObject(obj); |
| 7164 | ctxt->context->node = NULL; |
| 7165 | ctxt->context->contextSize = -1; |
| 7166 | ctxt->context->proximityPosition = -1; |
| 7167 | valuePush(ctxt, xmlXPathWrapNodeSet(newset)); |
| 7168 | } |
| 7169 | ctxt->context->node = oldnode; |
| 7170 | return; |
| 7171 | } |
| 7172 | case XPATH_OP_SORT: |
| 7173 | if (op->ch1 != -1) |
| 7174 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 7175 | if ((ctxt->value != NULL) && |
| 7176 | (ctxt->value->type == XPATH_NODESET) && |
| 7177 | (ctxt->value->nodesetval != NULL)) |
| 7178 | xmlXPathNodeSetSort(ctxt->value->nodesetval); |
| 7179 | return; |
| 7180 | #ifdef LIBXML_XPTR_ENABLED |
| 7181 | case XPATH_OP_RANGETO: { |
| 7182 | xmlXPathObjectPtr range; |
| 7183 | xmlXPathObjectPtr res, obj; |
| 7184 | xmlXPathObjectPtr tmp; |
| 7185 | xmlLocationSetPtr newset = NULL; |
| 7186 | xmlNodeSetPtr oldset; |
| 7187 | int i; |
| 7188 | |
| 7189 | if (op->ch1 != -1) |
| 7190 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); |
| 7191 | if (op->ch2 == -1) |
| 7192 | return; |
| 7193 | |
| 7194 | CHECK_TYPE(XPATH_NODESET); |
| 7195 | obj = valuePop(ctxt); |
| 7196 | oldset = obj->nodesetval; |
| 7197 | ctxt->context->node = NULL; |
| 7198 | |
| 7199 | newset = xmlXPtrLocationSetCreate(NULL); |
| 7200 | |
| 7201 | for (i = 0; i < oldset->nodeNr; i++) { |
| 7202 | /* |
| 7203 | * Run the evaluation with a node list made of a single item |
| 7204 | * in the nodeset. |
| 7205 | */ |
| 7206 | ctxt->context->node = oldset->nodeTab[i]; |
| 7207 | tmp = xmlXPathNewNodeSet(ctxt->context->node); |
| 7208 | valuePush(ctxt, tmp); |
| 7209 | |
| 7210 | if (op->ch2 != -1) |
| 7211 | xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); |
| 7212 | CHECK_ERROR; |
| 7213 | |
| 7214 | /* |
| 7215 | * The result of the evaluation need to be tested to |
| 7216 | * decided whether the filter succeeded or not |
| 7217 | */ |
| 7218 | res = valuePop(ctxt); |
| 7219 | range = xmlXPtrNewRangeNodeObject(oldset->nodeTab[i], res); |
| 7220 | if (range != NULL) { |
| 7221 | xmlXPtrLocationSetAdd(newset, range); |
| 7222 | } |
| 7223 | |
| 7224 | /* |
| 7225 | * Cleanup |
| 7226 | */ |
| 7227 | if (res != NULL) |
| 7228 | xmlXPathFreeObject(res); |
| 7229 | if (ctxt->value == tmp) { |
| 7230 | res = valuePop(ctxt); |
| 7231 | xmlXPathFreeObject(res); |
| 7232 | } |
| 7233 | |
| 7234 | ctxt->context->node = NULL; |
| 7235 | } |
| 7236 | |
| 7237 | /* |
| 7238 | * The result is used as the new evaluation set. |
| 7239 | */ |
| 7240 | xmlXPathFreeObject(obj); |
| 7241 | ctxt->context->node = NULL; |
| 7242 | ctxt->context->contextSize = -1; |
| 7243 | ctxt->context->proximityPosition = -1; |
| 7244 | valuePush(ctxt, xmlXPtrWrapLocationSet(newset)); |
| 7245 | return; |
| 7246 | } |
| 7247 | #endif /* LIBXML_XPTR_ENABLED */ |
| 7248 | } |
| 7249 | xmlGenericError(xmlGenericErrorContext, |
| 7250 | "XPath: unknown precompiled operation %d\n", |
| 7251 | op->op); |
| 7252 | return; |
| 7253 | } |
| 7254 | |
| 7255 | /** |
| 7256 | * xmlXPathRunEval: |
| 7257 | * @ctxt: the XPath parser context with the compiled expression |
| 7258 | * |
| 7259 | * Evaluate the Precompiled XPath expression in the given context. |
| 7260 | */ |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 7261 | static void |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7262 | xmlXPathRunEval(xmlXPathParserContextPtr ctxt) { |
| 7263 | xmlXPathCompExprPtr comp; |
| 7264 | |
| 7265 | if ((ctxt == NULL) || (ctxt->comp == NULL)) |
| 7266 | return; |
| 7267 | |
| 7268 | if (ctxt->valueTab == NULL) { |
| 7269 | /* Allocate the value stack */ |
| 7270 | ctxt->valueTab = (xmlXPathObjectPtr *) |
| 7271 | xmlMalloc(10 * sizeof(xmlXPathObjectPtr)); |
| 7272 | if (ctxt->valueTab == NULL) { |
| 7273 | xmlFree(ctxt); |
| 7274 | xmlGenericError(xmlGenericErrorContext, |
| 7275 | "xmlXPathRunEval: out of memory\n"); |
| 7276 | return; |
| 7277 | } |
| 7278 | ctxt->valueNr = 0; |
| 7279 | ctxt->valueMax = 10; |
| 7280 | ctxt->value = NULL; |
| 7281 | } |
| 7282 | comp = ctxt->comp; |
| 7283 | xmlXPathCompOpEval(ctxt, &comp->steps[comp->last]); |
| 7284 | } |
| 7285 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 7286 | /************************************************************************ |
| 7287 | * * |
| 7288 | * Public interfaces * |
| 7289 | * * |
| 7290 | ************************************************************************/ |
| 7291 | |
| 7292 | /** |
Daniel Veillard | fbf8a2d | 2001-03-19 15:58:54 +0000 | [diff] [blame] | 7293 | * xmlXPathEvalPredicate: |
| 7294 | * @ctxt: the XPath context |
| 7295 | * @res: the Predicate Expression evaluation result |
| 7296 | * |
| 7297 | * Evaluate a predicate result for the current node. |
| 7298 | * A PredicateExpr is evaluated by evaluating the Expr and converting |
| 7299 | * the result to a boolean. If the result is a number, the result will |
| 7300 | * be converted to true if the number is equal to the position of the |
| 7301 | * context node in the context node list (as returned by the position |
| 7302 | * function) and will be converted to false otherwise; if the result |
| 7303 | * is not a number, then the result will be converted as if by a call |
| 7304 | * to the boolean function. |
| 7305 | * |
| 7306 | * Return 1 if predicate is true, 0 otherwise |
| 7307 | */ |
| 7308 | int |
| 7309 | xmlXPathEvalPredicate(xmlXPathContextPtr ctxt, xmlXPathObjectPtr res) { |
| 7310 | if (res == NULL) return(0); |
| 7311 | switch (res->type) { |
| 7312 | case XPATH_BOOLEAN: |
| 7313 | return(res->boolval); |
| 7314 | case XPATH_NUMBER: |
| 7315 | return(res->floatval == ctxt->proximityPosition); |
| 7316 | case XPATH_NODESET: |
| 7317 | case XPATH_XSLT_TREE: |
| 7318 | return(res->nodesetval->nodeNr != 0); |
| 7319 | case XPATH_STRING: |
| 7320 | return((res->stringval != NULL) && |
| 7321 | (xmlStrlen(res->stringval) != 0)); |
| 7322 | default: |
| 7323 | STRANGE |
| 7324 | } |
| 7325 | return(0); |
| 7326 | } |
| 7327 | |
| 7328 | /** |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 7329 | * xmlXPathEvaluatePredicateResult: |
| 7330 | * @ctxt: the XPath Parser context |
| 7331 | * @res: the Predicate Expression evaluation result |
| 7332 | * |
| 7333 | * Evaluate a predicate result for the current node. |
| 7334 | * A PredicateExpr is evaluated by evaluating the Expr and converting |
| 7335 | * the result to a boolean. If the result is a number, the result will |
| 7336 | * be converted to true if the number is equal to the position of the |
| 7337 | * context node in the context node list (as returned by the position |
| 7338 | * function) and will be converted to false otherwise; if the result |
| 7339 | * is not a number, then the result will be converted as if by a call |
| 7340 | * to the boolean function. |
| 7341 | * |
| 7342 | * Return 1 if predicate is true, 0 otherwise |
| 7343 | */ |
| 7344 | int |
| 7345 | xmlXPathEvaluatePredicateResult(xmlXPathParserContextPtr ctxt, |
| 7346 | xmlXPathObjectPtr res) { |
| 7347 | if (res == NULL) return(0); |
| 7348 | switch (res->type) { |
| 7349 | case XPATH_BOOLEAN: |
| 7350 | return(res->boolval); |
| 7351 | case XPATH_NUMBER: |
| 7352 | return(res->floatval == ctxt->context->proximityPosition); |
| 7353 | case XPATH_NODESET: |
| 7354 | case XPATH_XSLT_TREE: |
| 7355 | return(res->nodesetval->nodeNr != 0); |
| 7356 | case XPATH_STRING: |
| 7357 | return((res->stringval != NULL) && |
| 7358 | (xmlStrlen(res->stringval) != 0)); |
| 7359 | default: |
| 7360 | STRANGE |
| 7361 | } |
| 7362 | return(0); |
| 7363 | } |
| 7364 | |
| 7365 | /** |
| 7366 | * xmlXPathCompile: |
| 7367 | * @str: the XPath expression |
| 7368 | * |
| 7369 | * Compile an XPath expression |
| 7370 | * |
| 7371 | * Returns the xmlXPathObjectPtr resulting from the eveluation or NULL. |
| 7372 | * the caller has to free the object. |
| 7373 | */ |
| 7374 | xmlXPathCompExprPtr |
| 7375 | xmlXPathCompile(const xmlChar *str) { |
| 7376 | xmlXPathParserContextPtr ctxt; |
| 7377 | xmlXPathCompExprPtr comp; |
| 7378 | |
| 7379 | xmlXPathInit(); |
| 7380 | |
| 7381 | ctxt = xmlXPathNewParserContext(str, NULL); |
| 7382 | xmlXPathCompileExpr(ctxt); |
| 7383 | |
| 7384 | comp = ctxt->comp; |
| 7385 | ctxt->comp = NULL; |
| 7386 | xmlXPathFreeParserContext(ctxt); |
| 7387 | return(comp); |
| 7388 | } |
| 7389 | |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7390 | /** |
| 7391 | * xmlXPathCompiledEval: |
| 7392 | * @comp: the compiled XPath expression |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 7393 | * @ctx: the XPath context |
| 7394 | * |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7395 | * Evaluate the Precompiled XPath expression in the given context. |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 7396 | * |
| 7397 | * Returns the xmlXPathObjectPtr resulting from the eveluation or NULL. |
| 7398 | * the caller has to free the object. |
| 7399 | */ |
| 7400 | xmlXPathObjectPtr |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7401 | xmlXPathCompiledEval(xmlXPathCompExprPtr comp, xmlXPathContextPtr ctx) { |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 7402 | xmlXPathParserContextPtr ctxt; |
| 7403 | xmlXPathObjectPtr res, tmp, init = NULL; |
| 7404 | int stack = 0; |
| 7405 | |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7406 | if ((comp == NULL) || (ctx == NULL)) |
| 7407 | return(NULL); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 7408 | xmlXPathInit(); |
| 7409 | |
| 7410 | CHECK_CONTEXT(ctx) |
| 7411 | |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7412 | ctxt = xmlXPathCompParserContext(comp, ctx); |
| 7413 | xmlXPathRunEval(ctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 7414 | |
| 7415 | if (ctxt->value == NULL) { |
| 7416 | xmlGenericError(xmlGenericErrorContext, |
| 7417 | "xmlXPathEval: evaluation failed\n"); |
| 7418 | res = NULL; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 7419 | } else { |
| 7420 | res = valuePop(ctxt); |
| 7421 | } |
| 7422 | |
| 7423 | do { |
| 7424 | tmp = valuePop(ctxt); |
| 7425 | if (tmp != NULL) { |
| 7426 | if (tmp != init) |
| 7427 | stack++; |
| 7428 | xmlXPathFreeObject(tmp); |
| 7429 | } |
| 7430 | } while (tmp != NULL); |
| 7431 | if ((stack != 0) && (res != NULL)) { |
| 7432 | xmlGenericError(xmlGenericErrorContext, |
| 7433 | "xmlXPathEval: %d object left on the stack\n", |
| 7434 | stack); |
| 7435 | } |
| 7436 | if (ctxt->error != XPATH_EXPRESSION_OK) { |
| 7437 | xmlXPathFreeObject(res); |
| 7438 | res = NULL; |
| 7439 | } |
| 7440 | |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7441 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 7442 | ctxt->comp = NULL; |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7443 | xmlXPathFreeParserContext(ctxt); |
| 7444 | return(res); |
| 7445 | } |
| 7446 | |
Daniel Veillard | afcbe1c | 2001-03-19 10:57:13 +0000 | [diff] [blame] | 7447 | /** |
| 7448 | * xmlXPathEvalExpr: |
| 7449 | * @ctxt: the XPath Parser context |
| 7450 | * |
| 7451 | * Parse and evaluate an XPath expression in the given context, |
| 7452 | * then push the result on the context stack |
| 7453 | */ |
| 7454 | void |
| 7455 | xmlXPathEvalExpr(xmlXPathParserContextPtr ctxt) { |
| 7456 | xmlXPathCompileExpr(ctxt); |
| 7457 | xmlXPathRunEval(ctxt); |
| 7458 | } |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7459 | |
| 7460 | /** |
| 7461 | * xmlXPathEval: |
| 7462 | * @str: the XPath expression |
| 7463 | * @ctx: the XPath context |
| 7464 | * |
| 7465 | * Evaluate the XPath Location Path in the given context. |
| 7466 | * |
| 7467 | * Returns the xmlXPathObjectPtr resulting from the eveluation or NULL. |
| 7468 | * the caller has to free the object. |
| 7469 | */ |
| 7470 | xmlXPathObjectPtr |
| 7471 | xmlXPathEval(const xmlChar *str, xmlXPathContextPtr ctx) { |
| 7472 | xmlXPathParserContextPtr ctxt; |
| 7473 | xmlXPathObjectPtr res, tmp, init = NULL; |
| 7474 | int stack = 0; |
| 7475 | |
| 7476 | xmlXPathInit(); |
| 7477 | |
| 7478 | CHECK_CONTEXT(ctx) |
| 7479 | |
| 7480 | ctxt = xmlXPathNewParserContext(str, ctx); |
| 7481 | xmlXPathEvalExpr(ctxt); |
Daniel Veillard | 9e7160d | 2001-03-18 23:17:47 +0000 | [diff] [blame] | 7482 | |
| 7483 | if (ctxt->value == NULL) { |
| 7484 | xmlGenericError(xmlGenericErrorContext, |
| 7485 | "xmlXPathEval: evaluation failed\n"); |
| 7486 | res = NULL; |
| 7487 | } else if (*ctxt->cur != 0) { |
| 7488 | xmlXPatherror(ctxt, __FILE__, __LINE__, XPATH_EXPR_ERROR); |
| 7489 | res = NULL; |
| 7490 | } else { |
| 7491 | res = valuePop(ctxt); |
| 7492 | } |
| 7493 | |
| 7494 | do { |
| 7495 | tmp = valuePop(ctxt); |
| 7496 | if (tmp != NULL) { |
| 7497 | if (tmp != init) |
| 7498 | stack++; |
| 7499 | xmlXPathFreeObject(tmp); |
| 7500 | } |
| 7501 | } while (tmp != NULL); |
| 7502 | if ((stack != 0) && (res != NULL)) { |
| 7503 | xmlGenericError(xmlGenericErrorContext, |
| 7504 | "xmlXPathEval: %d object left on the stack\n", |
| 7505 | stack); |
| 7506 | } |
| 7507 | if (ctxt->error != XPATH_EXPRESSION_OK) { |
| 7508 | xmlXPathFreeObject(res); |
| 7509 | res = NULL; |
| 7510 | } |
| 7511 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 7512 | xmlXPathFreeParserContext(ctxt); |
| 7513 | return(res); |
| 7514 | } |
| 7515 | |
| 7516 | /** |
| 7517 | * xmlXPathEvalExpression: |
| 7518 | * @str: the XPath expression |
| 7519 | * @ctxt: the XPath context |
| 7520 | * |
| 7521 | * Evaluate the XPath expression in the given context. |
| 7522 | * |
| 7523 | * Returns the xmlXPathObjectPtr resulting from the evaluation or NULL. |
| 7524 | * the caller has to free the object. |
| 7525 | */ |
| 7526 | xmlXPathObjectPtr |
| 7527 | xmlXPathEvalExpression(const xmlChar *str, xmlXPathContextPtr ctxt) { |
| 7528 | xmlXPathParserContextPtr pctxt; |
| 7529 | xmlXPathObjectPtr res, tmp; |
| 7530 | int stack = 0; |
| 7531 | |
| 7532 | xmlXPathInit(); |
| 7533 | |
| 7534 | CHECK_CONTEXT(ctxt) |
| 7535 | |
| 7536 | pctxt = xmlXPathNewParserContext(str, ctxt); |
| 7537 | xmlXPathEvalExpr(pctxt); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 7538 | |
| 7539 | if (*pctxt->cur != 0) { |
| 7540 | xmlXPatherror(pctxt, __FILE__, __LINE__, XPATH_EXPR_ERROR); |
| 7541 | res = NULL; |
| 7542 | } else { |
| 7543 | res = valuePop(pctxt); |
| 7544 | } |
| 7545 | do { |
| 7546 | tmp = valuePop(pctxt); |
| 7547 | if (tmp != NULL) { |
| 7548 | xmlXPathFreeObject(tmp); |
| 7549 | stack++; |
| 7550 | } |
| 7551 | } while (tmp != NULL); |
| 7552 | if ((stack != 0) && (res != NULL)) { |
| 7553 | xmlGenericError(xmlGenericErrorContext, |
| 7554 | "xmlXPathEvalExpression: %d object left on the stack\n", |
| 7555 | stack); |
| 7556 | } |
| 7557 | xmlXPathFreeParserContext(pctxt); |
| 7558 | return(res); |
| 7559 | } |
| 7560 | |
| 7561 | /** |
| 7562 | * xmlXPathRegisterAllFunctions: |
| 7563 | * @ctxt: the XPath context |
| 7564 | * |
| 7565 | * Registers all default XPath functions in this context |
| 7566 | */ |
| 7567 | void |
| 7568 | xmlXPathRegisterAllFunctions(xmlXPathContextPtr ctxt) |
| 7569 | { |
| 7570 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"boolean", |
| 7571 | xmlXPathBooleanFunction); |
| 7572 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"ceiling", |
| 7573 | xmlXPathCeilingFunction); |
| 7574 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"count", |
| 7575 | xmlXPathCountFunction); |
| 7576 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"concat", |
| 7577 | xmlXPathConcatFunction); |
| 7578 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"contains", |
| 7579 | xmlXPathContainsFunction); |
| 7580 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"id", |
| 7581 | xmlXPathIdFunction); |
| 7582 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"false", |
| 7583 | xmlXPathFalseFunction); |
| 7584 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"floor", |
| 7585 | xmlXPathFloorFunction); |
| 7586 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"last", |
| 7587 | xmlXPathLastFunction); |
| 7588 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"lang", |
| 7589 | xmlXPathLangFunction); |
| 7590 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"local-name", |
| 7591 | xmlXPathLocalNameFunction); |
| 7592 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"not", |
| 7593 | xmlXPathNotFunction); |
| 7594 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"name", |
| 7595 | xmlXPathNameFunction); |
| 7596 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"namespace-uri", |
| 7597 | xmlXPathNamespaceURIFunction); |
| 7598 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"normalize-space", |
| 7599 | xmlXPathNormalizeFunction); |
| 7600 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"number", |
| 7601 | xmlXPathNumberFunction); |
| 7602 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"position", |
| 7603 | xmlXPathPositionFunction); |
| 7604 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"round", |
| 7605 | xmlXPathRoundFunction); |
| 7606 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"string", |
| 7607 | xmlXPathStringFunction); |
| 7608 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"string-length", |
| 7609 | xmlXPathStringLengthFunction); |
| 7610 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"starts-with", |
| 7611 | xmlXPathStartsWithFunction); |
| 7612 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"substring", |
| 7613 | xmlXPathSubstringFunction); |
| 7614 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"substring-before", |
| 7615 | xmlXPathSubstringBeforeFunction); |
| 7616 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"substring-after", |
| 7617 | xmlXPathSubstringAfterFunction); |
| 7618 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"sum", |
| 7619 | xmlXPathSumFunction); |
| 7620 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"true", |
| 7621 | xmlXPathTrueFunction); |
| 7622 | xmlXPathRegisterFunc(ctxt, (const xmlChar *)"translate", |
| 7623 | xmlXPathTranslateFunction); |
| 7624 | } |
| 7625 | |
| 7626 | #endif /* LIBXML_XPATH_ENABLED */ |