Daniel Veillard | 4255d50 | 2002-04-16 15:50:10 +0000 | [diff] [blame] | 1 | /* |
| 2 | * schemastypes.c : implementation of the XML Schema Datatypes |
| 3 | * definition and validity checking |
| 4 | * |
| 5 | * See Copyright for the status of this software. |
| 6 | * |
| 7 | * Daniel Veillard <veillard@redhat.com> |
| 8 | */ |
| 9 | |
| 10 | #define IN_LIBXML |
| 11 | #include "libxml.h" |
| 12 | |
| 13 | #ifdef LIBXML_SCHEMAS_ENABLED |
| 14 | |
| 15 | #include <string.h> |
| 16 | #include <libxml/xmlmemory.h> |
| 17 | #include <libxml/parser.h> |
| 18 | #include <libxml/parserInternals.h> |
| 19 | #include <libxml/hash.h> |
| 20 | #include <libxml/valid.h> |
| 21 | |
| 22 | #include <libxml/xmlschemas.h> |
| 23 | #include <libxml/schemasInternals.h> |
| 24 | #include <libxml/xmlschemastypes.h> |
| 25 | |
| 26 | #define DEBUG |
| 27 | |
| 28 | #define TODO \ |
| 29 | xmlGenericError(xmlGenericErrorContext, \ |
| 30 | "Unimplemented block at %s:%d\n", \ |
| 31 | __FILE__, __LINE__); |
| 32 | |
| 33 | #define XML_SCHEMAS_NAMESPACE_NAME \ |
| 34 | (const xmlChar *)"http://www.w3.org/2001/XMLSchema" |
| 35 | |
| 36 | typedef enum { |
| 37 | XML_SCHEMAS_UNKNOWN = 0, |
| 38 | XML_SCHEMAS_STRING, |
| 39 | XML_SCHEMAS_NMTOKEN, |
| 40 | XML_SCHEMAS_DECIMAL, |
| 41 | XML_SCHEMAS_, |
| 42 | XML_SCHEMAS_XXX |
| 43 | } xmlSchemaValType; |
| 44 | |
| 45 | unsigned long powten[10] = { |
| 46 | 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000L, |
| 47 | 100000000L, 1000000000L |
| 48 | }; |
| 49 | |
| 50 | typedef struct _xmlSchemaValDecimal xmlSchemaValDecimal; |
| 51 | typedef xmlSchemaValDecimal *xmlSchemaValDecimalPtr; |
| 52 | struct _xmlSchemaValDecimal { |
| 53 | /* would use long long but not portable */ |
| 54 | unsigned long base; |
| 55 | unsigned int extra; |
| 56 | int sign:1; |
| 57 | int frac:7; |
| 58 | int total:8; |
| 59 | }; |
| 60 | |
| 61 | struct _xmlSchemaVal { |
| 62 | xmlSchemaValType type; |
| 63 | union { |
| 64 | xmlSchemaValDecimal decimal; |
| 65 | } value; |
| 66 | }; |
| 67 | |
| 68 | static int xmlSchemaTypesInitialized = 0; |
| 69 | static xmlHashTablePtr xmlSchemaTypesBank = NULL; |
| 70 | |
| 71 | static xmlSchemaTypePtr xmlSchemaTypeStringDef = NULL; |
| 72 | static xmlSchemaTypePtr xmlSchemaTypeAnyTypeDef = NULL; |
| 73 | static xmlSchemaTypePtr xmlSchemaTypeAnySimpleTypeDef = NULL; |
| 74 | static xmlSchemaTypePtr xmlSchemaTypeDecimalDef = NULL; |
| 75 | static xmlSchemaTypePtr xmlSchemaTypeDateDef = NULL; |
| 76 | static xmlSchemaTypePtr xmlSchemaTypePositiveIntegerDef = NULL; |
| 77 | static xmlSchemaTypePtr xmlSchemaTypeNonNegativeIntegerDef = NULL; |
| 78 | static xmlSchemaTypePtr xmlSchemaTypeNmtoken = NULL; |
| 79 | |
| 80 | /* |
| 81 | * xmlSchemaInitBasicType: |
| 82 | * @name: the type name |
| 83 | * |
| 84 | * Initialize one default type |
| 85 | */ |
| 86 | static xmlSchemaTypePtr |
| 87 | xmlSchemaInitBasicType(const char *name) { |
| 88 | xmlSchemaTypePtr ret; |
| 89 | |
| 90 | ret = (xmlSchemaTypePtr) xmlMalloc(sizeof(xmlSchemaType)); |
| 91 | if (ret == NULL) { |
| 92 | xmlGenericError(xmlGenericErrorContext, |
| 93 | "Could not initilize type %s: out of memory\n", name); |
| 94 | return(NULL); |
| 95 | } |
| 96 | memset(ret, 0, sizeof(xmlSchemaType)); |
| 97 | ret->name = xmlStrdup((const xmlChar *)name); |
| 98 | ret->type = XML_SCHEMA_TYPE_BASIC; |
| 99 | ret->contentType = XML_SCHEMA_CONTENT_BASIC; |
| 100 | xmlHashAddEntry2(xmlSchemaTypesBank, ret->name, |
| 101 | XML_SCHEMAS_NAMESPACE_NAME, ret); |
| 102 | return(ret); |
| 103 | } |
| 104 | |
| 105 | /* |
| 106 | * xmlSchemaInitTypes: |
| 107 | * |
| 108 | * Initialize the default XML Schemas type library |
| 109 | */ |
| 110 | void |
| 111 | xmlSchemaInitTypes(void) { |
| 112 | if (xmlSchemaTypesInitialized != 0) |
| 113 | return; |
| 114 | xmlSchemaTypesBank = xmlHashCreate(40); |
| 115 | |
| 116 | xmlSchemaTypeStringDef = xmlSchemaInitBasicType("string"); |
| 117 | xmlSchemaTypeAnyTypeDef = xmlSchemaInitBasicType("anyType"); |
| 118 | xmlSchemaTypeAnySimpleTypeDef = xmlSchemaInitBasicType("anySimpleType"); |
| 119 | xmlSchemaTypeDecimalDef = xmlSchemaInitBasicType("decimal"); |
| 120 | xmlSchemaTypeDateDef = xmlSchemaInitBasicType("date"); |
| 121 | xmlSchemaTypePositiveIntegerDef = xmlSchemaInitBasicType("positiveInteger"); |
| 122 | xmlSchemaTypeNonNegativeIntegerDef = |
| 123 | xmlSchemaInitBasicType("nonNegativeInteger"); |
| 124 | xmlSchemaTypeNmtoken = xmlSchemaInitBasicType("NMTOKEN"); |
| 125 | |
| 126 | xmlSchemaTypesInitialized = 1; |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * xmlSchemaCleanupTypes: |
| 131 | * |
| 132 | * Cleanup the default XML Schemas type library |
| 133 | */ |
| 134 | void |
| 135 | xmlSchemaCleanupTypes(void) { |
| 136 | if (xmlSchemaTypesInitialized == 0) |
| 137 | return; |
| 138 | xmlHashFree(xmlSchemaTypesBank, (xmlHashDeallocator) xmlSchemaFreeType); |
| 139 | xmlSchemaTypesInitialized = 0; |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * xmlSchemaNewValue: |
| 144 | * @type: the value type |
| 145 | * |
| 146 | * Allocate a new simple type value |
| 147 | * |
| 148 | * Returns a pointer to the new value or NULL in case of error |
| 149 | */ |
| 150 | static xmlSchemaValPtr |
| 151 | xmlSchemaNewValue(xmlSchemaValType type) { |
| 152 | xmlSchemaValPtr value; |
| 153 | |
| 154 | value = (xmlSchemaValPtr) xmlMalloc(sizeof(xmlSchemaVal)); |
| 155 | if (value == NULL) { |
| 156 | return(NULL); |
| 157 | } |
| 158 | memset(value, 0, sizeof(xmlSchemaVal)); |
| 159 | value->type = type; |
| 160 | return(value); |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * xmlSchemaFreeValue: |
| 165 | * @value: the value to free |
| 166 | * |
| 167 | * Cleanup the default XML Schemas type library |
| 168 | */ |
| 169 | void |
| 170 | xmlSchemaFreeValue(xmlSchemaValPtr value) { |
| 171 | if (value == NULL) |
| 172 | return; |
| 173 | xmlFree(value); |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * xmlSchemaGetPredefinedType: |
| 178 | * @name: the type name |
| 179 | * @ns: the URI of the namespace usually "http://www.w3.org/2001/XMLSchema" |
| 180 | * |
| 181 | * Lookup a type in the default XML Schemas type library |
| 182 | * |
| 183 | * Returns the type if found, NULL otherwise |
| 184 | */ |
| 185 | xmlSchemaTypePtr |
| 186 | xmlSchemaGetPredefinedType(const xmlChar *name, const xmlChar *ns) { |
| 187 | if (xmlSchemaTypesInitialized == 0) |
| 188 | xmlSchemaInitTypes(); |
| 189 | if (name == NULL) |
| 190 | return(NULL); |
| 191 | return((xmlSchemaTypePtr) xmlHashLookup2(xmlSchemaTypesBank, name, ns)); |
| 192 | } |
| 193 | /** |
| 194 | * xmlSchemaValidatePredefinedType: |
| 195 | * @type: the predefined type |
| 196 | * @value: the value to check |
| 197 | * @val: the return computed value |
| 198 | * |
| 199 | * Check that a value conforms to the lexical space of the predefined type. |
| 200 | * if true a value is computed and returned in @val. |
| 201 | * |
| 202 | * Returns 0 if this validates, a positive error code number otherwise |
| 203 | * and -1 in case of internal or API error. |
| 204 | */ |
| 205 | int |
| 206 | xmlSchemaValidatePredefinedType(xmlSchemaTypePtr type, const xmlChar *value, |
| 207 | xmlSchemaValPtr *val) { |
| 208 | xmlSchemaValPtr v; |
| 209 | |
| 210 | if (xmlSchemaTypesInitialized == 0) |
| 211 | return(-1); |
| 212 | if (type == NULL) |
| 213 | return(-1); |
| 214 | if (val != NULL) |
| 215 | *val = NULL; |
| 216 | if (type == xmlSchemaTypeStringDef) { |
| 217 | return(0); |
| 218 | } else if (type == xmlSchemaTypeAnyTypeDef) { |
| 219 | return(0); |
| 220 | } else if (type == xmlSchemaTypeAnySimpleTypeDef) { |
| 221 | return(0); |
| 222 | } else if (type == xmlSchemaTypeNmtoken) { |
| 223 | if (xmlValidateNmtokenValue(value)) |
| 224 | return(0); |
| 225 | return(1); |
| 226 | } else if (type == xmlSchemaTypeDecimalDef) { |
| 227 | const xmlChar *cur = value, *tmp; |
| 228 | int frac = 0, main, neg = 0; |
| 229 | unsigned long base = 0; |
| 230 | if (cur == NULL) |
| 231 | return(1); |
| 232 | if (*cur == '+') |
| 233 | cur++; |
| 234 | else if (*cur == '-') { |
| 235 | neg = 1; |
| 236 | cur++; |
| 237 | } |
| 238 | tmp = cur; |
| 239 | while ((*cur >= '0') && (*cur <= '9')) { |
| 240 | base = base * 10 + (*cur - '0'); |
| 241 | cur++; |
| 242 | } |
| 243 | main = cur - tmp; |
| 244 | if (*cur == '.') { |
| 245 | cur++; |
| 246 | tmp = cur; |
| 247 | while ((*cur >= '0') && (*cur <= '9')) { |
| 248 | base = base * 10 + (*cur - '0'); |
| 249 | cur++; |
| 250 | } |
| 251 | frac = cur - tmp; |
| 252 | } |
| 253 | if (*cur != 0) |
| 254 | return(1); |
| 255 | if (val != NULL) { |
| 256 | v = xmlSchemaNewValue(XML_SCHEMAS_DECIMAL); |
| 257 | if (v != NULL) { |
| 258 | v->value.decimal.base = base; |
| 259 | v->value.decimal.sign = neg; |
| 260 | v->value.decimal.frac = frac; |
| 261 | v->value.decimal.total = frac + main; |
| 262 | *val = v; |
| 263 | } |
| 264 | } |
| 265 | return(0); |
| 266 | } else if (type == xmlSchemaTypeDateDef) { |
| 267 | const xmlChar *cur = value; |
| 268 | if (cur == NULL) |
| 269 | return(1); |
| 270 | if (*cur == '-') |
| 271 | cur++; |
| 272 | if ((*cur < '0') || (*cur > '9')) |
| 273 | return(1); |
| 274 | if ((*cur < '0') || (*cur > '9')) |
| 275 | return(1); |
| 276 | if ((*cur < '0') || (*cur > '9')) |
| 277 | return(1); |
| 278 | if ((*cur < '0') || (*cur > '9')) |
| 279 | return(1); |
| 280 | while ((*cur >= '0') && (*cur <= '9')) |
| 281 | cur++; |
| 282 | if (*cur != '-') |
| 283 | return(1); |
| 284 | cur++; |
| 285 | if ((*cur != '0') && (*cur != '1')) |
| 286 | return(1); |
| 287 | if ((*cur == '0') && (cur[1] == '0')) |
| 288 | return(1); |
| 289 | if ((*cur == '1') && ((cur[1] < '0') || (cur[1] > '2'))) |
| 290 | return(1); |
| 291 | cur += 2; |
| 292 | if (*cur != '-') |
| 293 | return(1); |
| 294 | cur++; |
| 295 | if ((*cur < '0') || (*cur > '3')) |
| 296 | return(1); |
| 297 | if ((*cur == '0') && (cur[1] == '0')) |
| 298 | return(1); |
| 299 | if ((*cur == '3') && ((cur[1] < '0') || (cur[1] > '1'))) |
| 300 | return(1); |
| 301 | cur += 2; |
| 302 | if (*cur != 0) |
| 303 | return(1); |
| 304 | return(0); |
| 305 | } else if (type == xmlSchemaTypePositiveIntegerDef) { |
| 306 | const xmlChar *cur = value; |
| 307 | unsigned long base = 0; |
| 308 | int total = 0; |
| 309 | if (cur == NULL) |
| 310 | return(1); |
| 311 | if (*cur == '+') |
| 312 | cur++; |
| 313 | while ((*cur >= '0') && (*cur <= '9')) { |
| 314 | base = base * 10 + (*cur - '0'); |
| 315 | total++; |
| 316 | cur++; |
| 317 | } |
| 318 | if (*cur != 0) |
| 319 | return(1); |
| 320 | if (val != NULL) { |
| 321 | v = xmlSchemaNewValue(XML_SCHEMAS_DECIMAL); |
| 322 | if (v != NULL) { |
| 323 | v->value.decimal.base = base; |
| 324 | v->value.decimal.sign = 0; |
| 325 | v->value.decimal.frac = 0; |
| 326 | v->value.decimal.total = total; |
| 327 | *val = v; |
| 328 | } |
| 329 | } |
| 330 | return(0); |
| 331 | } else if (type == xmlSchemaTypeNonNegativeIntegerDef) { |
| 332 | const xmlChar *cur = value; |
| 333 | unsigned long base = 0; |
| 334 | int total = 0; |
| 335 | int sign = 0; |
| 336 | if (cur == NULL) |
| 337 | return(1); |
| 338 | if (*cur == '-') { |
| 339 | sign = 1; |
| 340 | cur++; |
| 341 | } else if (*cur == '+') |
| 342 | cur++; |
| 343 | while ((*cur >= '0') && (*cur <= '9')) { |
| 344 | base = base * 10 + (*cur - '0'); |
| 345 | total++; |
| 346 | cur++; |
| 347 | } |
| 348 | if (*cur != 0) |
| 349 | return(1); |
| 350 | if ((sign == 1) && (base != 0)) |
| 351 | return(1); |
| 352 | if (val != NULL) { |
| 353 | v = xmlSchemaNewValue(XML_SCHEMAS_DECIMAL); |
| 354 | if (v != NULL) { |
| 355 | v->value.decimal.base = base; |
| 356 | v->value.decimal.sign = 0; |
| 357 | v->value.decimal.frac = 0; |
| 358 | v->value.decimal.total = total; |
| 359 | *val = v; |
| 360 | } |
| 361 | } |
| 362 | return(0); |
| 363 | } else { |
| 364 | TODO |
| 365 | return(0); |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | /** |
| 370 | * xmlSchemaCompareDecimals: |
| 371 | * @x: a first decimal value |
| 372 | * @y: a second decimal value |
| 373 | * |
| 374 | * Compare 2 decimals |
| 375 | * |
| 376 | * Returns -1 if x < y, 0 if x == y, 1 if x > y and -2 in case of error |
| 377 | */ |
| 378 | static int |
| 379 | xmlSchemaCompareDecimals(xmlSchemaValPtr x, xmlSchemaValPtr y) |
| 380 | { |
| 381 | xmlSchemaValPtr swp; |
| 382 | int order = 1; |
| 383 | unsigned long tmp; |
| 384 | |
| 385 | if ((x->value.decimal.sign) && (x->value.decimal.sign)) |
| 386 | order = -1; |
| 387 | else if (x->value.decimal.sign) |
| 388 | return (-1); |
| 389 | else if (y->value.decimal.sign) |
| 390 | return (1); |
| 391 | if (x->value.decimal.frac == y->value.decimal.frac) { |
| 392 | if (x->value.decimal.base < y->value.decimal.base) |
| 393 | return (-1); |
| 394 | return (x->value.decimal.base > y->value.decimal.base); |
| 395 | } |
| 396 | if (y->value.decimal.frac > x->value.decimal.frac) { |
| 397 | swp = y; |
| 398 | y = x; |
| 399 | x = swp; |
| 400 | order = -order; |
| 401 | } |
| 402 | tmp = |
| 403 | x->value.decimal.base / powten[x->value.decimal.frac - |
| 404 | y->value.decimal.frac]; |
| 405 | if (tmp > y->value.decimal.base) |
| 406 | return (order); |
| 407 | if (tmp < y->value.decimal.base) |
| 408 | return (-order); |
| 409 | tmp = |
| 410 | y->value.decimal.base * powten[x->value.decimal.frac - |
| 411 | y->value.decimal.frac]; |
| 412 | if (x->value.decimal.base < tmp) |
| 413 | return (-order); |
| 414 | if (x->value.decimal.base == tmp) |
| 415 | return (0); |
| 416 | return (order); |
| 417 | } |
| 418 | |
| 419 | /** |
| 420 | * xmlSchemaCompareValues: |
| 421 | * @x: a first value |
| 422 | * @y: a second value |
| 423 | * |
| 424 | * Compare 2 values |
| 425 | * |
| 426 | * Returns -1 if x < y, 0 if x == y, 1 if x > y and -2 in case of error |
| 427 | */ |
| 428 | int |
| 429 | xmlSchemaCompareValues(xmlSchemaValPtr x, xmlSchemaValPtr y) { |
| 430 | if ((x == NULL) || (y == NULL)) |
| 431 | return(-2); |
| 432 | |
| 433 | switch (x->type) { |
| 434 | case XML_SCHEMAS_STRING: |
| 435 | TODO |
| 436 | case XML_SCHEMAS_DECIMAL: |
| 437 | if (y->type == XML_SCHEMAS_DECIMAL) |
| 438 | return(xmlSchemaCompareDecimals(x, y)); |
| 439 | else |
| 440 | return(-2); |
| 441 | default: |
| 442 | TODO |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | /** |
| 447 | * xmlSchemaValidateFacet: |
| 448 | * @type: the type declaration |
| 449 | * @facet: the facet to check |
| 450 | * @value: the lexical repr of the value to validate |
| 451 | * @val: the precomputed value |
| 452 | * |
| 453 | * Check a value against a facet condition |
| 454 | * |
| 455 | * Returns 0 if the element is schemas valid, a positive error code |
| 456 | * number otherwise and -1 in case of internal or API error. |
| 457 | */ |
| 458 | int |
| 459 | xmlSchemaValidateFacet(xmlSchemaTypePtr base, xmlSchemaFacetPtr facet, |
| 460 | const xmlChar *value, xmlSchemaValPtr val) |
| 461 | { |
| 462 | int ret; |
| 463 | |
| 464 | switch (facet->type) { |
| 465 | case XML_SCHEMA_FACET_PATTERN: |
| 466 | ret = xmlRegexpExec(facet->regexp, value); |
| 467 | if (ret == 1) |
| 468 | return(0); |
| 469 | if (ret == 0) { |
| 470 | TODO /* error code */ |
| 471 | return(1); |
| 472 | } |
| 473 | return(ret); |
| 474 | case XML_SCHEMA_FACET_MAXEXCLUSIVE: |
| 475 | ret = xmlSchemaCompareValues(val, facet->val); |
| 476 | if (ret == -2) { |
| 477 | TODO /* error code */ |
| 478 | return(-1); |
| 479 | } |
| 480 | if (ret == -1) |
| 481 | return(0); |
| 482 | TODO /* error code */ |
| 483 | return(1); |
Daniel Veillard | 8651f53 | 2002-04-17 09:06:27 +0000 | [diff] [blame] | 484 | case XML_SCHEMA_FACET_WHITESPACE: |
| 485 | TODO /* whitespaces */ |
| 486 | return(0); |
Daniel Veillard | 4255d50 | 2002-04-16 15:50:10 +0000 | [diff] [blame] | 487 | default: |
| 488 | TODO |
| 489 | } |
| 490 | return(0); |
| 491 | } |
| 492 | |
| 493 | #endif /* LIBXML_SCHEMAS_ENABLED */ |