1 /* 2 ******************************************************************************* 3 * 4 * Copyright (C) 2003-2014, International Business Machines 5 * Corporation and others. All Rights Reserved. 6 * 7 ******************************************************************************* 8 * file name: ucol_swp.cpp 9 * encoding: US-ASCII 10 * tab size: 8 (not used) 11 * indentation:4 12 * 13 * created on: 2003sep10 14 * created by: Markus W. Scherer 15 * 16 * Swap collation binaries. 17 */ 18 19 #include "unicode/udata.h" /* UDataInfo */ 20 #include "utrie.h" 21 #include "utrie2.h" 22 #include "udataswp.h" 23 #include "cmemory.h" 24 #include "ucol_data.h" 25 #include "ucol_swp.h" 26 27 /* swapping ----------------------------------------------------------------- */ 28 29 /* 30 * This performs data swapping for a folded trie (see utrie.c for details). 31 */ 32 33 U_CAPI int32_t U_EXPORT2 34 utrie_swap(const UDataSwapper *ds, 35 const void *inData, int32_t length, void *outData, 36 UErrorCode *pErrorCode) { 37 const UTrieHeader *inTrie; 38 UTrieHeader trie; 39 int32_t size; 40 UBool dataIs32; 41 42 if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { 43 return 0; 44 } 45 if(ds==NULL || inData==NULL || (length>=0 && outData==NULL)) { 46 *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; 47 return 0; 48 } 49 50 /* setup and swapping */ 51 if(length>=0 && (uint32_t)length<sizeof(UTrieHeader)) { 52 *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR; 53 return 0; 54 } 55 56 inTrie=(const UTrieHeader *)inData; 57 trie.signature=ds->readUInt32(inTrie->signature); 58 trie.options=ds->readUInt32(inTrie->options); 59 trie.indexLength=udata_readInt32(ds, inTrie->indexLength); 60 trie.dataLength=udata_readInt32(ds, inTrie->dataLength); 61 62 if( trie.signature!=0x54726965 || 63 (trie.options&UTRIE_OPTIONS_SHIFT_MASK)!=UTRIE_SHIFT || 64 ((trie.options>>UTRIE_OPTIONS_INDEX_SHIFT)&UTRIE_OPTIONS_SHIFT_MASK)!=UTRIE_INDEX_SHIFT || 65 trie.indexLength<UTRIE_BMP_INDEX_LENGTH || 66 (trie.indexLength&(UTRIE_SURROGATE_BLOCK_COUNT-1))!=0 || 67 trie.dataLength<UTRIE_DATA_BLOCK_LENGTH || 68 (trie.dataLength&(UTRIE_DATA_GRANULARITY-1))!=0 || 69 ((trie.options&UTRIE_OPTIONS_LATIN1_IS_LINEAR)!=0 && trie.dataLength<(UTRIE_DATA_BLOCK_LENGTH+0x100)) 70 ) { 71 *pErrorCode=U_INVALID_FORMAT_ERROR; /* not a UTrie */ 72 return 0; 73 } 74 75 dataIs32=(UBool)((trie.options&UTRIE_OPTIONS_DATA_IS_32_BIT)!=0); 76 size=sizeof(UTrieHeader)+trie.indexLength*2+trie.dataLength*(dataIs32?4:2); 77 78 if(length>=0) { 79 UTrieHeader *outTrie; 80 81 if(length<size) { 82 *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR; 83 return 0; 84 } 85 86 outTrie=(UTrieHeader *)outData; 87 88 /* swap the header */ 89 ds->swapArray32(ds, inTrie, sizeof(UTrieHeader), outTrie, pErrorCode); 90 91 /* swap the index and the data */ 92 if(dataIs32) { 93 ds->swapArray16(ds, inTrie+1, trie.indexLength*2, outTrie+1, pErrorCode); 94 ds->swapArray32(ds, (const uint16_t *)(inTrie+1)+trie.indexLength, trie.dataLength*4, 95 (uint16_t *)(outTrie+1)+trie.indexLength, pErrorCode); 96 } else { 97 ds->swapArray16(ds, inTrie+1, (trie.indexLength+trie.dataLength)*2, outTrie+1, pErrorCode); 98 } 99 } 100 101 return size; 102 } 103 104 #if !UCONFIG_NO_COLLATION 105 106 U_CAPI UBool U_EXPORT2 107 ucol_looksLikeCollationBinary(const UDataSwapper *ds, 108 const void *inData, int32_t length) { 109 if(ds==NULL || inData==NULL || length<-1) { 110 return FALSE; 111 } 112 113 // First check for format version 4+ which has a standard data header. 114 UErrorCode errorCode=U_ZERO_ERROR; 115 (void)udata_swapDataHeader(ds, inData, -1, NULL, &errorCode); 116 if(U_SUCCESS(errorCode)) { 117 const UDataInfo &info=*(const UDataInfo *)((const char *)inData+4); 118 if(info.dataFormat[0]==0x55 && // dataFormat="UCol" 119 info.dataFormat[1]==0x43 && 120 info.dataFormat[2]==0x6f && 121 info.dataFormat[3]==0x6c) { 122 return TRUE; 123 } 124 } 125 126 // Else check for format version 3. 127 const UCATableHeader *inHeader=(const UCATableHeader *)inData; 128 129 /* 130 * The collation binary must contain at least the UCATableHeader, 131 * starting with its size field. 132 * sizeof(UCATableHeader)==42*4 in ICU 2.8 133 * check the length against the header size before reading the size field 134 */ 135 UCATableHeader header; 136 uprv_memset(&header, 0, sizeof(header)); 137 if(length<0) { 138 header.size=udata_readInt32(ds, inHeader->size); 139 } else if((length<(42*4) || length<(header.size=udata_readInt32(ds, inHeader->size)))) { 140 return FALSE; 141 } 142 143 header.magic=ds->readUInt32(inHeader->magic); 144 if(!( 145 header.magic==UCOL_HEADER_MAGIC && 146 inHeader->formatVersion[0]==3 /*&& 147 inHeader->formatVersion[1]>=0*/ 148 )) { 149 return FALSE; 150 } 151 152 if(inHeader->isBigEndian!=ds->inIsBigEndian || inHeader->charSetFamily!=ds->inCharset) { 153 return FALSE; 154 } 155 156 return TRUE; 157 } 158 159 namespace { 160 161 /* swap a header-less collation formatVersion=3 binary, inside a resource bundle or ucadata.icu */ 162 int32_t 163 swapFormatVersion3(const UDataSwapper *ds, 164 const void *inData, int32_t length, void *outData, 165 UErrorCode *pErrorCode) { 166 const uint8_t *inBytes; 167 uint8_t *outBytes; 168 169 const UCATableHeader *inHeader; 170 UCATableHeader *outHeader; 171 UCATableHeader header; 172 173 uint32_t count; 174 175 /* argument checking in case we were not called from ucol_swap() */ 176 if(U_FAILURE(*pErrorCode)) { 177 return 0; 178 } 179 if(ds==NULL || inData==NULL || length<-1 || (length>0 && outData==NULL)) { 180 *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; 181 return 0; 182 } 183 184 inBytes=(const uint8_t *)inData; 185 outBytes=(uint8_t *)outData; 186 187 inHeader=(const UCATableHeader *)inData; 188 outHeader=(UCATableHeader *)outData; 189 190 /* 191 * The collation binary must contain at least the UCATableHeader, 192 * starting with its size field. 193 * sizeof(UCATableHeader)==42*4 in ICU 2.8 194 * check the length against the header size before reading the size field 195 */ 196 uprv_memset(&header, 0, sizeof(header)); 197 if(length<0) { 198 header.size=udata_readInt32(ds, inHeader->size); 199 } else if((length<(42*4) || length<(header.size=udata_readInt32(ds, inHeader->size)))) { 200 udata_printError(ds, "ucol_swap(formatVersion=3): too few bytes (%d after header) for collation data\n", 201 length); 202 *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR; 203 return 0; 204 } 205 206 header.magic=ds->readUInt32(inHeader->magic); 207 if(!( 208 header.magic==UCOL_HEADER_MAGIC && 209 inHeader->formatVersion[0]==3 /*&& 210 inHeader->formatVersion[1]>=0*/ 211 )) { 212 udata_printError(ds, "ucol_swap(formatVersion=3): magic 0x%08x or format version %02x.%02x is not a collation binary\n", 213 header.magic, 214 inHeader->formatVersion[0], inHeader->formatVersion[1]); 215 *pErrorCode=U_UNSUPPORTED_ERROR; 216 return 0; 217 } 218 219 if(inHeader->isBigEndian!=ds->inIsBigEndian || inHeader->charSetFamily!=ds->inCharset) { 220 udata_printError(ds, "ucol_swap(formatVersion=3): endianness %d or charset %d does not match the swapper\n", 221 inHeader->isBigEndian, inHeader->charSetFamily); 222 *pErrorCode=U_INVALID_FORMAT_ERROR; 223 return 0; 224 } 225 226 if(length>=0) { 227 /* copy everything, takes care of data that needs no swapping */ 228 if(inBytes!=outBytes) { 229 uprv_memcpy(outBytes, inBytes, header.size); 230 } 231 232 /* swap the necessary pieces in the order of their occurrence in the data */ 233 234 /* read more of the UCATableHeader (the size field was read above) */ 235 header.options= ds->readUInt32(inHeader->options); 236 header.UCAConsts= ds->readUInt32(inHeader->UCAConsts); 237 header.contractionUCACombos= ds->readUInt32(inHeader->contractionUCACombos); 238 header.mappingPosition= ds->readUInt32(inHeader->mappingPosition); 239 header.expansion= ds->readUInt32(inHeader->expansion); 240 header.contractionIndex= ds->readUInt32(inHeader->contractionIndex); 241 header.contractionCEs= ds->readUInt32(inHeader->contractionCEs); 242 header.contractionSize= ds->readUInt32(inHeader->contractionSize); 243 header.endExpansionCE= ds->readUInt32(inHeader->endExpansionCE); 244 header.expansionCESize= ds->readUInt32(inHeader->expansionCESize); 245 header.endExpansionCECount= udata_readInt32(ds, inHeader->endExpansionCECount); 246 header.contractionUCACombosSize=udata_readInt32(ds, inHeader->contractionUCACombosSize); 247 header.scriptToLeadByte= ds->readUInt32(inHeader->scriptToLeadByte); 248 header.leadByteToScript= ds->readUInt32(inHeader->leadByteToScript); 249 250 /* swap the 32-bit integers in the header */ 251 ds->swapArray32(ds, inHeader, (int32_t)((const char *)&inHeader->jamoSpecial-(const char *)inHeader), 252 outHeader, pErrorCode); 253 ds->swapArray32(ds, &(inHeader->scriptToLeadByte), sizeof(header.scriptToLeadByte) + sizeof(header.leadByteToScript), 254 &(outHeader->scriptToLeadByte), pErrorCode); 255 /* set the output platform properties */ 256 outHeader->isBigEndian=ds->outIsBigEndian; 257 outHeader->charSetFamily=ds->outCharset; 258 259 /* swap the options */ 260 if(header.options!=0) { 261 ds->swapArray32(ds, inBytes+header.options, header.expansion-header.options, 262 outBytes+header.options, pErrorCode); 263 } 264 265 /* swap the expansions */ 266 if(header.mappingPosition!=0 && header.expansion!=0) { 267 if(header.contractionIndex!=0) { 268 /* expansions bounded by contractions */ 269 count=header.contractionIndex-header.expansion; 270 } else { 271 /* no contractions: expansions bounded by the main trie */ 272 count=header.mappingPosition-header.expansion; 273 } 274 ds->swapArray32(ds, inBytes+header.expansion, (int32_t)count, 275 outBytes+header.expansion, pErrorCode); 276 } 277 278 /* swap the contractions */ 279 if(header.contractionSize!=0) { 280 /* contractionIndex: UChar[] */ 281 ds->swapArray16(ds, inBytes+header.contractionIndex, header.contractionSize*2, 282 outBytes+header.contractionIndex, pErrorCode); 283 284 /* contractionCEs: CEs[] */ 285 ds->swapArray32(ds, inBytes+header.contractionCEs, header.contractionSize*4, 286 outBytes+header.contractionCEs, pErrorCode); 287 } 288 289 /* swap the main trie */ 290 if(header.mappingPosition!=0) { 291 count=header.endExpansionCE-header.mappingPosition; 292 utrie_swap(ds, inBytes+header.mappingPosition, (int32_t)count, 293 outBytes+header.mappingPosition, pErrorCode); 294 } 295 296 /* swap the max expansion table */ 297 if(header.endExpansionCECount!=0) { 298 ds->swapArray32(ds, inBytes+header.endExpansionCE, header.endExpansionCECount*4, 299 outBytes+header.endExpansionCE, pErrorCode); 300 } 301 302 /* expansionCESize, unsafeCP, contrEndCP: uint8_t[], no need to swap */ 303 304 /* swap UCA constants */ 305 if(header.UCAConsts!=0) { 306 /* 307 * if UCAConsts!=0 then contractionUCACombos because we are swapping 308 * the UCA data file, and we know that the UCA contains contractions 309 */ 310 count=header.contractionUCACombos-header.UCAConsts; 311 ds->swapArray32(ds, inBytes+header.UCAConsts, header.contractionUCACombos-header.UCAConsts, 312 outBytes+header.UCAConsts, pErrorCode); 313 } 314 315 /* swap UCA contractions */ 316 if(header.contractionUCACombosSize!=0) { 317 count=header.contractionUCACombosSize*inHeader->contractionUCACombosWidth*U_SIZEOF_UCHAR; 318 ds->swapArray16(ds, inBytes+header.contractionUCACombos, (int32_t)count, 319 outBytes+header.contractionUCACombos, pErrorCode); 320 } 321 322 /* swap the script to lead bytes */ 323 if(header.scriptToLeadByte!=0) { 324 int indexCount = ds->readUInt16(*((uint16_t*)(inBytes+header.scriptToLeadByte))); // each entry = 2 * uint16 325 int dataCount = ds->readUInt16(*((uint16_t*)(inBytes+header.scriptToLeadByte + 2))); // each entry = uint16 326 ds->swapArray16(ds, inBytes+header.scriptToLeadByte, 327 4 + (4 * indexCount) + (2 * dataCount), 328 outBytes+header.scriptToLeadByte, pErrorCode); 329 } 330 331 /* swap the lead byte to scripts */ 332 if(header.leadByteToScript!=0) { 333 int indexCount = ds->readUInt16(*((uint16_t*)(inBytes+header.leadByteToScript))); // each entry = uint16 334 int dataCount = ds->readUInt16(*((uint16_t*)(inBytes+header.leadByteToScript + 2))); // each entry = uint16 335 ds->swapArray16(ds, inBytes+header.leadByteToScript, 336 4 + (2 * indexCount) + (2 * dataCount), 337 outBytes+header.leadByteToScript, pErrorCode); 338 } 339 } 340 341 return header.size; 342 } 343 344 // swap formatVersion 4 ---------------------------------------------------- *** 345 346 // The following are copied from CollationDataReader, trading an awkward copy of constants 347 // for an awkward relocation of the i18n collationdatareader.h file into the common library. 348 // Keep them in sync! 349 350 enum { 351 IX_INDEXES_LENGTH, // 0 352 IX_OPTIONS, 353 IX_RESERVED2, 354 IX_RESERVED3, 355 356 IX_JAMO_CE32S_START, // 4 357 IX_REORDER_CODES_OFFSET, 358 IX_REORDER_TABLE_OFFSET, 359 IX_TRIE_OFFSET, 360 361 IX_RESERVED8_OFFSET, // 8 362 IX_CES_OFFSET, 363 IX_RESERVED10_OFFSET, 364 IX_CE32S_OFFSET, 365 366 IX_ROOT_ELEMENTS_OFFSET, // 12 367 IX_CONTEXTS_OFFSET, 368 IX_UNSAFE_BWD_OFFSET, 369 IX_FAST_LATIN_TABLE_OFFSET, 370 371 IX_SCRIPTS_OFFSET, // 16 372 IX_COMPRESSIBLE_BYTES_OFFSET, 373 IX_RESERVED18_OFFSET, 374 IX_TOTAL_SIZE 375 }; 376 377 int32_t 378 swapFormatVersion4(const UDataSwapper *ds, 379 const void *inData, int32_t length, void *outData, 380 UErrorCode &errorCode) { 381 if(U_FAILURE(errorCode)) { return 0; } 382 383 const uint8_t *inBytes=(const uint8_t *)inData; 384 uint8_t *outBytes=(uint8_t *)outData; 385 386 const int32_t *inIndexes=(const int32_t *)inBytes; 387 int32_t indexes[IX_TOTAL_SIZE+1]; 388 389 // Need at least IX_INDEXES_LENGTH and IX_OPTIONS. 390 if(0<=length && length<8) { 391 udata_printError(ds, "ucol_swap(formatVersion=4): too few bytes " 392 "(%d after header) for collation data\n", 393 length); 394 errorCode=U_INDEX_OUTOFBOUNDS_ERROR; 395 return 0; 396 } 397 398 int32_t indexesLength=indexes[0]=udata_readInt32(ds, inIndexes[0]); 399 if(0<=length && length<(indexesLength*4)) { 400 udata_printError(ds, "ucol_swap(formatVersion=4): too few bytes " 401 "(%d after header) for collation data\n", 402 length); 403 errorCode=U_INDEX_OUTOFBOUNDS_ERROR; 404 return 0; 405 } 406 407 for(int32_t i=1; i<=IX_TOTAL_SIZE && i<indexesLength; ++i) { 408 indexes[i]=udata_readInt32(ds, inIndexes[i]); 409 } 410 for(int32_t i=indexesLength; i<=IX_TOTAL_SIZE; ++i) { 411 indexes[i]=-1; 412 } 413 inIndexes=NULL; // Make sure we do not accidentally use these instead of indexes[]. 414 415 // Get the total length of the data. 416 int32_t size; 417 if(indexesLength>IX_TOTAL_SIZE) { 418 size=indexes[IX_TOTAL_SIZE]; 419 } else if(indexesLength>IX_REORDER_CODES_OFFSET) { 420 size=indexes[indexesLength-1]; 421 } else { 422 size=indexesLength*4; 423 } 424 if(length<0) { return size; } 425 426 if(length<size) { 427 udata_printError(ds, "ucol_swap(formatVersion=4): too few bytes " 428 "(%d after header) for collation data\n", 429 length); 430 errorCode=U_INDEX_OUTOFBOUNDS_ERROR; 431 return 0; 432 } 433 434 // Copy the data for inaccessible bytes and arrays of bytes. 435 if(inBytes!=outBytes) { 436 uprv_memcpy(outBytes, inBytes, size); 437 } 438 439 // Swap the int32_t indexes[]. 440 ds->swapArray32(ds, inBytes, indexesLength * 4, outBytes, &errorCode); 441 442 // The following is a modified version of CollationDataReader::read(). 443 // Here we use indexes[] not inIndexes[] because 444 // the inIndexes[] may not be in this machine's endianness. 445 int32_t index; // one of the indexes[] slots 446 int32_t offset; // byte offset for the index part 447 // int32_t length; // number of bytes in the index part 448 449 index = IX_REORDER_CODES_OFFSET; 450 offset = indexes[index]; 451 length = indexes[index + 1] - offset; 452 if(length > 0) { 453 ds->swapArray32(ds, inBytes + offset, length, outBytes + offset, &errorCode); 454 } 455 456 // Skip the IX_REORDER_TABLE_OFFSET byte array. 457 458 index = IX_TRIE_OFFSET; 459 offset = indexes[index]; 460 length = indexes[index + 1] - offset; 461 if(length > 0) { 462 utrie2_swap(ds, inBytes + offset, length, outBytes + offset, &errorCode); 463 } 464 465 index = IX_RESERVED8_OFFSET; 466 offset = indexes[index]; 467 length = indexes[index + 1] - offset; 468 if(length > 0) { 469 udata_printError(ds, "ucol_swap(formatVersion=4): unknown data at IX_RESERVED8_OFFSET\n", length); 470 errorCode = U_UNSUPPORTED_ERROR; 471 return 0; 472 } 473 474 index = IX_CES_OFFSET; 475 offset = indexes[index]; 476 length = indexes[index + 1] - offset; 477 if(length > 0) { 478 ds->swapArray64(ds, inBytes + offset, length, outBytes + offset, &errorCode); 479 } 480 481 index = IX_RESERVED10_OFFSET; 482 offset = indexes[index]; 483 length = indexes[index + 1] - offset; 484 if(length > 0) { 485 udata_printError(ds, "ucol_swap(formatVersion=4): unknown data at IX_RESERVED10_OFFSET\n", length); 486 errorCode = U_UNSUPPORTED_ERROR; 487 return 0; 488 } 489 490 index = IX_CE32S_OFFSET; 491 offset = indexes[index]; 492 length = indexes[index + 1] - offset; 493 if(length > 0) { 494 ds->swapArray32(ds, inBytes + offset, length, outBytes + offset, &errorCode); 495 } 496 497 index = IX_ROOT_ELEMENTS_OFFSET; 498 offset = indexes[index]; 499 length = indexes[index + 1] - offset; 500 if(length > 0) { 501 ds->swapArray32(ds, inBytes + offset, length, outBytes + offset, &errorCode); 502 } 503 504 index = IX_CONTEXTS_OFFSET; 505 offset = indexes[index]; 506 length = indexes[index + 1] - offset; 507 if(length > 0) { 508 ds->swapArray16(ds, inBytes + offset, length, outBytes + offset, &errorCode); 509 } 510 511 index = IX_UNSAFE_BWD_OFFSET; 512 offset = indexes[index]; 513 length = indexes[index + 1] - offset; 514 if(length > 0) { 515 ds->swapArray16(ds, inBytes + offset, length, outBytes + offset, &errorCode); 516 } 517 518 index = IX_FAST_LATIN_TABLE_OFFSET; 519 offset = indexes[index]; 520 length = indexes[index + 1] - offset; 521 if(length > 0) { 522 ds->swapArray16(ds, inBytes + offset, length, outBytes + offset, &errorCode); 523 } 524 525 index = IX_SCRIPTS_OFFSET; 526 offset = indexes[index]; 527 length = indexes[index + 1] - offset; 528 if(length > 0) { 529 ds->swapArray16(ds, inBytes + offset, length, outBytes + offset, &errorCode); 530 } 531 532 // Skip the IX_COMPRESSIBLE_BYTES_OFFSET byte array. 533 534 index = IX_RESERVED18_OFFSET; 535 offset = indexes[index]; 536 length = indexes[index + 1] - offset; 537 if(length > 0) { 538 udata_printError(ds, "ucol_swap(formatVersion=4): unknown data at IX_RESERVED18_OFFSET\n", length); 539 errorCode = U_UNSUPPORTED_ERROR; 540 return 0; 541 } 542 543 return size; 544 } 545 546 } // namespace 547 548 /* swap ICU collation data like ucadata.icu */ 549 U_CAPI int32_t U_EXPORT2 550 ucol_swap(const UDataSwapper *ds, 551 const void *inData, int32_t length, void *outData, 552 UErrorCode *pErrorCode) { 553 if(U_FAILURE(*pErrorCode)) { return 0; } 554 555 /* udata_swapDataHeader checks the arguments */ 556 int32_t headerSize=udata_swapDataHeader(ds, inData, length, outData, pErrorCode); 557 if(U_FAILURE(*pErrorCode)) { 558 // Try to swap the old format version which did not have a standard data header. 559 *pErrorCode=U_ZERO_ERROR; 560 return swapFormatVersion3(ds, inData, length, outData, pErrorCode); 561 } 562 563 /* check data format and format version */ 564 const UDataInfo &info=*(const UDataInfo *)((const char *)inData+4); 565 if(!( 566 info.dataFormat[0]==0x55 && // dataFormat="UCol" 567 info.dataFormat[1]==0x43 && 568 info.dataFormat[2]==0x6f && 569 info.dataFormat[3]==0x6c && 570 (info.formatVersion[0]==3 || info.formatVersion[0]==4) 571 )) { 572 udata_printError(ds, "ucol_swap(): data format %02x.%02x.%02x.%02x " 573 "(format version %02x.%02x) is not recognized as collation data\n", 574 info.dataFormat[0], info.dataFormat[1], 575 info.dataFormat[2], info.dataFormat[3], 576 info.formatVersion[0], info.formatVersion[1]); 577 *pErrorCode=U_UNSUPPORTED_ERROR; 578 return 0; 579 } 580 581 inData=(const char *)inData+headerSize; 582 if(length>=0) { length-=headerSize; } 583 outData=(char *)outData+headerSize; 584 int32_t collationSize; 585 if(info.formatVersion[0]>=4) { 586 collationSize=swapFormatVersion4(ds, inData, length, outData, *pErrorCode); 587 } else { 588 collationSize=swapFormatVersion3(ds, inData, length, outData, pErrorCode); 589 } 590 if(U_SUCCESS(*pErrorCode)) { 591 return headerSize+collationSize; 592 } else { 593 return 0; 594 } 595 } 596 597 /* swap inverse UCA collation data (invuca.icu) */ 598 U_CAPI int32_t U_EXPORT2 599 ucol_swapInverseUCA(const UDataSwapper *ds, 600 const void *inData, int32_t length, void *outData, 601 UErrorCode *pErrorCode) { 602 const UDataInfo *pInfo; 603 int32_t headerSize; 604 605 const uint8_t *inBytes; 606 uint8_t *outBytes; 607 608 const InverseUCATableHeader *inHeader; 609 InverseUCATableHeader *outHeader; 610 InverseUCATableHeader header={ 0,0,0,0,0,{0,0,0,0},{0,0,0,0,0,0,0,0} }; 611 612 /* udata_swapDataHeader checks the arguments */ 613 headerSize=udata_swapDataHeader(ds, inData, length, outData, pErrorCode); 614 if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { 615 return 0; 616 } 617 618 /* check data format and format version */ 619 pInfo=(const UDataInfo *)((const char *)inData+4); 620 if(!( 621 pInfo->dataFormat[0]==0x49 && /* dataFormat="InvC" */ 622 pInfo->dataFormat[1]==0x6e && 623 pInfo->dataFormat[2]==0x76 && 624 pInfo->dataFormat[3]==0x43 && 625 pInfo->formatVersion[0]==2 && 626 pInfo->formatVersion[1]>=1 627 )) { 628 udata_printError(ds, "ucol_swapInverseUCA(): data format %02x.%02x.%02x.%02x (format version %02x.%02x) is not an inverse UCA collation file\n", 629 pInfo->dataFormat[0], pInfo->dataFormat[1], 630 pInfo->dataFormat[2], pInfo->dataFormat[3], 631 pInfo->formatVersion[0], pInfo->formatVersion[1]); 632 *pErrorCode=U_UNSUPPORTED_ERROR; 633 return 0; 634 } 635 636 inBytes=(const uint8_t *)inData+headerSize; 637 outBytes=(uint8_t *)outData+headerSize; 638 639 inHeader=(const InverseUCATableHeader *)inBytes; 640 outHeader=(InverseUCATableHeader *)outBytes; 641 642 /* 643 * The inverse UCA collation binary must contain at least the InverseUCATableHeader, 644 * starting with its size field. 645 * sizeof(UCATableHeader)==8*4 in ICU 2.8 646 * check the length against the header size before reading the size field 647 */ 648 if(length<0) { 649 header.byteSize=udata_readInt32(ds, inHeader->byteSize); 650 } else if( 651 ((length-headerSize)<(8*4) || 652 (uint32_t)(length-headerSize)<(header.byteSize=udata_readInt32(ds, inHeader->byteSize))) 653 ) { 654 udata_printError(ds, "ucol_swapInverseUCA(): too few bytes (%d after header) for inverse UCA collation data\n", 655 length); 656 *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR; 657 return 0; 658 } 659 660 if(length>=0) { 661 /* copy everything, takes care of data that needs no swapping */ 662 if(inBytes!=outBytes) { 663 uprv_memcpy(outBytes, inBytes, header.byteSize); 664 } 665 666 /* swap the necessary pieces in the order of their occurrence in the data */ 667 668 /* read more of the InverseUCATableHeader (the byteSize field was read above) */ 669 header.tableSize= ds->readUInt32(inHeader->tableSize); 670 header.contsSize= ds->readUInt32(inHeader->contsSize); 671 header.table= ds->readUInt32(inHeader->table); 672 header.conts= ds->readUInt32(inHeader->conts); 673 674 /* swap the 32-bit integers in the header */ 675 ds->swapArray32(ds, inHeader, 5*4, outHeader, pErrorCode); 676 677 /* swap the inverse table; tableSize counts uint32_t[3] rows */ 678 ds->swapArray32(ds, inBytes+header.table, header.tableSize*3*4, 679 outBytes+header.table, pErrorCode); 680 681 /* swap the continuation table; contsSize counts UChars */ 682 ds->swapArray16(ds, inBytes+header.conts, header.contsSize*U_SIZEOF_UCHAR, 683 outBytes+header.conts, pErrorCode); 684 } 685 686 return headerSize+header.byteSize; 687 } 688 689 #endif /* #if !UCONFIG_NO_COLLATION */ 690
