diff options
Diffstat (limited to 'intl/icu/source/i18n/collationdatareader.cpp')
| -rw-r--r-- | intl/icu/source/i18n/collationdatareader.cpp | 482 |
1 files changed, 482 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/collationdatareader.cpp b/intl/icu/source/i18n/collationdatareader.cpp new file mode 100644 index 0000000000..0eb1861343 --- /dev/null +++ b/intl/icu/source/i18n/collationdatareader.cpp @@ -0,0 +1,482 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +******************************************************************************* +* Copyright (C) 2013-2015, International Business Machines +* Corporation and others. All Rights Reserved. +******************************************************************************* +* collationdatareader.cpp +* +* created on: 2013feb07 +* created by: Markus W. Scherer +*/ + +#include "unicode/utypes.h" + +#if !UCONFIG_NO_COLLATION + +#include "unicode/ucol.h" +#include "unicode/udata.h" +#include "unicode/uscript.h" +#include "cmemory.h" +#include "collation.h" +#include "collationdata.h" +#include "collationdatareader.h" +#include "collationfastlatin.h" +#include "collationkeys.h" +#include "collationrootelements.h" +#include "collationsettings.h" +#include "collationtailoring.h" +#include "collunsafe.h" +#include "normalizer2impl.h" +#include "uassert.h" +#include "ucmndata.h" +#include "utrie2.h" + +U_NAMESPACE_BEGIN + +namespace { + +int32_t getIndex(const int32_t *indexes, int32_t length, int32_t i) { + return (i < length) ? indexes[i] : -1; +} + +} // namespace + +void +CollationDataReader::read(const CollationTailoring *base, const uint8_t *inBytes, int32_t inLength, + CollationTailoring &tailoring, UErrorCode &errorCode) { + if(U_FAILURE(errorCode)) { return; } + if(base != NULL) { + if(inBytes == NULL || (0 <= inLength && inLength < 24)) { + errorCode = U_ILLEGAL_ARGUMENT_ERROR; + return; + } + const DataHeader *header = reinterpret_cast<const DataHeader *>(inBytes); + if(!(header->dataHeader.magic1 == 0xda && header->dataHeader.magic2 == 0x27 && + isAcceptable(tailoring.version, NULL, NULL, &header->info))) { + errorCode = U_INVALID_FORMAT_ERROR; + return; + } + if(base->getUCAVersion() != tailoring.getUCAVersion()) { + errorCode = U_COLLATOR_VERSION_MISMATCH; + return; + } + int32_t headerLength = header->dataHeader.headerSize; + inBytes += headerLength; + if(inLength >= 0) { + inLength -= headerLength; + } + } + + if(inBytes == NULL || (0 <= inLength && inLength < 8)) { + errorCode = U_ILLEGAL_ARGUMENT_ERROR; + return; + } + const int32_t *inIndexes = reinterpret_cast<const int32_t *>(inBytes); + int32_t indexesLength = inIndexes[IX_INDEXES_LENGTH]; + if(indexesLength < 2 || (0 <= inLength && inLength < indexesLength * 4)) { + errorCode = U_INVALID_FORMAT_ERROR; // Not enough indexes. + return; + } + + // Assume that the tailoring data is in initial state, + // with NULL pointers and 0 lengths. + + // Set pointers to non-empty data parts. + // Do this in order of their byte offsets. (Should help porting to Java.) + + int32_t index; // one of the indexes[] slots + int32_t offset; // byte offset for the index part + int32_t length; // number of bytes in the index part + + if(indexesLength > IX_TOTAL_SIZE) { + length = inIndexes[IX_TOTAL_SIZE]; + } else if(indexesLength > IX_REORDER_CODES_OFFSET) { + length = inIndexes[indexesLength - 1]; + } else { + length = 0; // only indexes, and inLength was already checked for them + } + if(0 <= inLength && inLength < length) { + errorCode = U_INVALID_FORMAT_ERROR; + return; + } + + const CollationData *baseData = base == NULL ? NULL : base->data; + const int32_t *reorderCodes = NULL; + int32_t reorderCodesLength = 0; + const uint32_t *reorderRanges = NULL; + int32_t reorderRangesLength = 0; + index = IX_REORDER_CODES_OFFSET; + offset = getIndex(inIndexes, indexesLength, index); + length = getIndex(inIndexes, indexesLength, index + 1) - offset; + if(length >= 4) { + if(baseData == NULL) { + // We assume for collation settings that + // the base data does not have a reordering. + errorCode = U_INVALID_FORMAT_ERROR; + return; + } + reorderCodes = reinterpret_cast<const int32_t *>(inBytes + offset); + reorderCodesLength = length / 4; + + // The reorderRanges (if any) are the trailing reorderCodes entries. + // Split the array at the boundary. + // Script or reorder codes do not exceed 16-bit values. + // Range limits are stored in the upper 16 bits, and are never 0. + while(reorderRangesLength < reorderCodesLength && + (reorderCodes[reorderCodesLength - reorderRangesLength - 1] & 0xffff0000) != 0) { + ++reorderRangesLength; + } + U_ASSERT(reorderRangesLength < reorderCodesLength); + if(reorderRangesLength != 0) { + reorderCodesLength -= reorderRangesLength; + reorderRanges = reinterpret_cast<const uint32_t *>(reorderCodes + reorderCodesLength); + } + } + + // There should be a reorder table only if there are reorder codes. + // However, when there are reorder codes the reorder table may be omitted to reduce + // the data size. + const uint8_t *reorderTable = NULL; + index = IX_REORDER_TABLE_OFFSET; + offset = getIndex(inIndexes, indexesLength, index); + length = getIndex(inIndexes, indexesLength, index + 1) - offset; + if(length >= 256) { + if(reorderCodesLength == 0) { + errorCode = U_INVALID_FORMAT_ERROR; // Reordering table without reordering codes. + return; + } + reorderTable = inBytes + offset; + } else { + // If we have reorder codes, then build the reorderTable at the end, + // when the CollationData is otherwise complete. + } + + if(baseData != NULL && baseData->numericPrimary != (inIndexes[IX_OPTIONS] & 0xff000000)) { + errorCode = U_INVALID_FORMAT_ERROR; + return; + } + CollationData *data = NULL; // Remains NULL if there are no mappings. + + index = IX_TRIE_OFFSET; + offset = getIndex(inIndexes, indexesLength, index); + length = getIndex(inIndexes, indexesLength, index + 1) - offset; + if(length >= 8) { + if(!tailoring.ensureOwnedData(errorCode)) { return; } + data = tailoring.ownedData; + data->base = baseData; + data->numericPrimary = inIndexes[IX_OPTIONS] & 0xff000000; + data->trie = tailoring.trie = utrie2_openFromSerialized( + UTRIE2_32_VALUE_BITS, inBytes + offset, length, NULL, + &errorCode); + if(U_FAILURE(errorCode)) { return; } + } else if(baseData != NULL) { + // Use the base data. Only the settings are tailored. + tailoring.data = baseData; + } else { + errorCode = U_INVALID_FORMAT_ERROR; // No mappings. + return; + } + + index = IX_CES_OFFSET; + offset = getIndex(inIndexes, indexesLength, index); + length = getIndex(inIndexes, indexesLength, index + 1) - offset; + if(length >= 8) { + if(data == NULL) { + errorCode = U_INVALID_FORMAT_ERROR; // Tailored ces without tailored trie. + return; + } + data->ces = reinterpret_cast<const int64_t *>(inBytes + offset); + data->cesLength = length / 8; + } + + index = IX_CE32S_OFFSET; + offset = getIndex(inIndexes, indexesLength, index); + length = getIndex(inIndexes, indexesLength, index + 1) - offset; + if(length >= 4) { + if(data == NULL) { + errorCode = U_INVALID_FORMAT_ERROR; // Tailored ce32s without tailored trie. + return; + } + data->ce32s = reinterpret_cast<const uint32_t *>(inBytes + offset); + data->ce32sLength = length / 4; + } + + int32_t jamoCE32sStart = getIndex(inIndexes, indexesLength, IX_JAMO_CE32S_START); + if(jamoCE32sStart >= 0) { + if(data == NULL || data->ce32s == NULL) { + errorCode = U_INVALID_FORMAT_ERROR; // Index into non-existent ce32s[]. + return; + } + data->jamoCE32s = data->ce32s + jamoCE32sStart; + } else if(data == NULL) { + // Nothing to do. + } else if(baseData != NULL) { + data->jamoCE32s = baseData->jamoCE32s; + } else { + errorCode = U_INVALID_FORMAT_ERROR; // No Jamo CE32s for Hangul processing. + return; + } + + index = IX_ROOT_ELEMENTS_OFFSET; + offset = getIndex(inIndexes, indexesLength, index); + length = getIndex(inIndexes, indexesLength, index + 1) - offset; + if(length >= 4) { + length /= 4; + if(data == NULL || length <= CollationRootElements::IX_SEC_TER_BOUNDARIES) { + errorCode = U_INVALID_FORMAT_ERROR; + return; + } + data->rootElements = reinterpret_cast<const uint32_t *>(inBytes + offset); + data->rootElementsLength = length; + uint32_t commonSecTer = data->rootElements[CollationRootElements::IX_COMMON_SEC_AND_TER_CE]; + if(commonSecTer != Collation::COMMON_SEC_AND_TER_CE) { + errorCode = U_INVALID_FORMAT_ERROR; + return; + } + uint32_t secTerBoundaries = data->rootElements[CollationRootElements::IX_SEC_TER_BOUNDARIES]; + if((secTerBoundaries >> 24) < CollationKeys::SEC_COMMON_HIGH) { + // [fixed last secondary common byte] is too low, + // and secondary weights would collide with compressed common secondaries. + errorCode = U_INVALID_FORMAT_ERROR; + return; + } + } + + index = IX_CONTEXTS_OFFSET; + offset = getIndex(inIndexes, indexesLength, index); + length = getIndex(inIndexes, indexesLength, index + 1) - offset; + if(length >= 2) { + if(data == NULL) { + errorCode = U_INVALID_FORMAT_ERROR; // Tailored contexts without tailored trie. + return; + } + data->contexts = reinterpret_cast<const UChar *>(inBytes + offset); + data->contextsLength = length / 2; + } + + index = IX_UNSAFE_BWD_OFFSET; + offset = getIndex(inIndexes, indexesLength, index); + length = getIndex(inIndexes, indexesLength, index + 1) - offset; + if(length >= 2) { + if(data == NULL) { + errorCode = U_INVALID_FORMAT_ERROR; + return; + } + if(baseData == NULL) { +#if defined(COLLUNSAFE_COLL_VERSION) && defined (COLLUNSAFE_SERIALIZE) + tailoring.unsafeBackwardSet = new UnicodeSet(unsafe_serializedData, unsafe_serializedCount, UnicodeSet::kSerialized, errorCode); + if(tailoring.unsafeBackwardSet == NULL) { + errorCode = U_MEMORY_ALLOCATION_ERROR; + return; + } else if (U_FAILURE(errorCode)) { + return; + } +#else + // Create the unsafe-backward set for the root collator. + // Include all non-zero combining marks and trail surrogates. + // We do this at load time, rather than at build time, + // to simplify Unicode version bootstrapping: + // The root data builder only needs the new FractionalUCA.txt data, + // but it need not be built with a version of ICU already updated to + // the corresponding new Unicode Character Database. + // + // The following is an optimized version of + // new UnicodeSet("[[:^lccc=0:][\\udc00-\\udfff]]"). + // It is faster and requires fewer code dependencies. + tailoring.unsafeBackwardSet = new UnicodeSet(0xdc00, 0xdfff); // trail surrogates + if(tailoring.unsafeBackwardSet == NULL) { + errorCode = U_MEMORY_ALLOCATION_ERROR; + return; + } + data->nfcImpl.addLcccChars(*tailoring.unsafeBackwardSet); +#endif // !COLLUNSAFE_SERIALIZE || !COLLUNSAFE_COLL_VERSION + } else { + // Clone the root collator's set contents. + tailoring.unsafeBackwardSet = static_cast<UnicodeSet *>( + baseData->unsafeBackwardSet->cloneAsThawed()); + if(tailoring.unsafeBackwardSet == NULL) { + errorCode = U_MEMORY_ALLOCATION_ERROR; + return; + } + } + // Add the ranges from the data file to the unsafe-backward set. + USerializedSet sset; + const uint16_t *unsafeData = reinterpret_cast<const uint16_t *>(inBytes + offset); + if(!uset_getSerializedSet(&sset, unsafeData, length / 2)) { + errorCode = U_INVALID_FORMAT_ERROR; + return; + } + int32_t count = uset_getSerializedRangeCount(&sset); + for(int32_t i = 0; i < count; ++i) { + UChar32 start, end; + uset_getSerializedRange(&sset, i, &start, &end); + tailoring.unsafeBackwardSet->add(start, end); + } + // Mark each lead surrogate as "unsafe" + // if any of its 1024 associated supplementary code points is "unsafe". + UChar32 c = 0x10000; + for(UChar lead = 0xd800; lead < 0xdc00; ++lead, c += 0x400) { + if(!tailoring.unsafeBackwardSet->containsNone(c, c + 0x3ff)) { + tailoring.unsafeBackwardSet->add(lead); + } + } + tailoring.unsafeBackwardSet->freeze(); + data->unsafeBackwardSet = tailoring.unsafeBackwardSet; + } else if(data == NULL) { + // Nothing to do. + } else if(baseData != NULL) { + // No tailoring-specific data: Alias the root collator's set. + data->unsafeBackwardSet = baseData->unsafeBackwardSet; + } else { + errorCode = U_INVALID_FORMAT_ERROR; // No unsafeBackwardSet. + return; + } + + // If the fast Latin format version is different, + // or the version is set to 0 for "no fast Latin table", + // then just always use the normal string comparison path. + if(data != NULL) { + data->fastLatinTable = NULL; + data->fastLatinTableLength = 0; + if(((inIndexes[IX_OPTIONS] >> 16) & 0xff) == CollationFastLatin::VERSION) { + index = IX_FAST_LATIN_TABLE_OFFSET; + offset = getIndex(inIndexes, indexesLength, index); + length = getIndex(inIndexes, indexesLength, index + 1) - offset; + if(length >= 2) { + data->fastLatinTable = reinterpret_cast<const uint16_t *>(inBytes + offset); + data->fastLatinTableLength = length / 2; + if((*data->fastLatinTable >> 8) != CollationFastLatin::VERSION) { + errorCode = U_INVALID_FORMAT_ERROR; // header vs. table version mismatch + return; + } + } else if(baseData != NULL) { + data->fastLatinTable = baseData->fastLatinTable; + data->fastLatinTableLength = baseData->fastLatinTableLength; + } + } + } + + index = IX_SCRIPTS_OFFSET; + offset = getIndex(inIndexes, indexesLength, index); + length = getIndex(inIndexes, indexesLength, index + 1) - offset; + if(length >= 2) { + if(data == NULL) { + errorCode = U_INVALID_FORMAT_ERROR; + return; + } + const uint16_t *scripts = reinterpret_cast<const uint16_t *>(inBytes + offset); + int32_t scriptsLength = length / 2; + data->numScripts = scripts[0]; + // There must be enough entries for both arrays, including more than two range starts. + data->scriptStartsLength = scriptsLength - (1 + data->numScripts + 16); + if(data->scriptStartsLength <= 2 || + CollationData::MAX_NUM_SCRIPT_RANGES < data->scriptStartsLength) { + errorCode = U_INVALID_FORMAT_ERROR; + return; + } + data->scriptsIndex = scripts + 1; + data->scriptStarts = scripts + 1 + data->numScripts + 16; + if(!(data->scriptStarts[0] == 0 && + data->scriptStarts[1] == ((Collation::MERGE_SEPARATOR_BYTE + 1) << 8) && + data->scriptStarts[data->scriptStartsLength - 1] == + (Collation::TRAIL_WEIGHT_BYTE << 8))) { + errorCode = U_INVALID_FORMAT_ERROR; + return; + } + } else if(data == NULL) { + // Nothing to do. + } else if(baseData != NULL) { + data->numScripts = baseData->numScripts; + data->scriptsIndex = baseData->scriptsIndex; + data->scriptStarts = baseData->scriptStarts; + data->scriptStartsLength = baseData->scriptStartsLength; + } + + index = IX_COMPRESSIBLE_BYTES_OFFSET; + offset = getIndex(inIndexes, indexesLength, index); + length = getIndex(inIndexes, indexesLength, index + 1) - offset; + if(length >= 256) { + if(data == NULL) { + errorCode = U_INVALID_FORMAT_ERROR; + return; + } + data->compressibleBytes = reinterpret_cast<const UBool *>(inBytes + offset); + } else if(data == NULL) { + // Nothing to do. + } else if(baseData != NULL) { + data->compressibleBytes = baseData->compressibleBytes; + } else { + errorCode = U_INVALID_FORMAT_ERROR; // No compressibleBytes[]. + return; + } + + const CollationSettings &ts = *tailoring.settings; + int32_t options = inIndexes[IX_OPTIONS] & 0xffff; + uint16_t fastLatinPrimaries[CollationFastLatin::LATIN_LIMIT]; + int32_t fastLatinOptions = CollationFastLatin::getOptions( + tailoring.data, ts, fastLatinPrimaries, UPRV_LENGTHOF(fastLatinPrimaries)); + if(options == ts.options && ts.variableTop != 0 && + reorderCodesLength == ts.reorderCodesLength && + (reorderCodesLength == 0 || + uprv_memcmp(reorderCodes, ts.reorderCodes, reorderCodesLength * 4) == 0) && + fastLatinOptions == ts.fastLatinOptions && + (fastLatinOptions < 0 || + uprv_memcmp(fastLatinPrimaries, ts.fastLatinPrimaries, + sizeof(fastLatinPrimaries)) == 0)) { + return; + } + + CollationSettings *settings = SharedObject::copyOnWrite(tailoring.settings); + if(settings == NULL) { + errorCode = U_MEMORY_ALLOCATION_ERROR; + return; + } + settings->options = options; + // Set variableTop from options and scripts data. + settings->variableTop = tailoring.data->getLastPrimaryForGroup( + UCOL_REORDER_CODE_FIRST + settings->getMaxVariable()); + if(settings->variableTop == 0) { + errorCode = U_INVALID_FORMAT_ERROR; + return; + } + + if(reorderCodesLength != 0) { + settings->aliasReordering(*baseData, reorderCodes, reorderCodesLength, + reorderRanges, reorderRangesLength, + reorderTable, errorCode); + } + + settings->fastLatinOptions = CollationFastLatin::getOptions( + tailoring.data, *settings, + settings->fastLatinPrimaries, UPRV_LENGTHOF(settings->fastLatinPrimaries)); +} + +UBool U_CALLCONV +CollationDataReader::isAcceptable(void *context, + const char * /* type */, const char * /*name*/, + const UDataInfo *pInfo) { + if( + pInfo->size >= 20 && + pInfo->isBigEndian == U_IS_BIG_ENDIAN && + pInfo->charsetFamily == U_CHARSET_FAMILY && + pInfo->dataFormat[0] == 0x55 && // dataFormat="UCol" + pInfo->dataFormat[1] == 0x43 && + pInfo->dataFormat[2] == 0x6f && + pInfo->dataFormat[3] == 0x6c && + pInfo->formatVersion[0] == 5 + ) { + UVersionInfo *version = static_cast<UVersionInfo *>(context); + if(version != NULL) { + uprv_memcpy(version, pInfo->dataVersion, 4); + } + return TRUE; + } else { + return FALSE; + } +} + +U_NAMESPACE_END + +#endif // !UCONFIG_NO_COLLATION |