| /* |
| ******************************************************************************* |
| * Copyright (C) 2014, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| ******************************************************************************* |
| * dictionarydata.h |
| * |
| * created on: 2012may31 |
| * created by: Markus W. Scherer & Maxime Serrano |
| */ |
| |
| #include "starboard/client_porting/poem/string_poem.h" |
| #include "dictionarydata.h" |
| #include "unicode/ucharstrie.h" |
| #include "unicode/bytestrie.h" |
| #include "unicode/udata.h" |
| #include "cmemory.h" |
| |
| #if !UCONFIG_NO_BREAK_ITERATION |
| |
| U_NAMESPACE_BEGIN |
| |
| const int32_t DictionaryData::TRIE_TYPE_BYTES = 0; |
| const int32_t DictionaryData::TRIE_TYPE_UCHARS = 1; |
| const int32_t DictionaryData::TRIE_TYPE_MASK = 7; |
| const int32_t DictionaryData::TRIE_HAS_VALUES = 8; |
| |
| const int32_t DictionaryData::TRANSFORM_NONE = 0; |
| const int32_t DictionaryData::TRANSFORM_TYPE_OFFSET = 0x1000000; |
| const int32_t DictionaryData::TRANSFORM_TYPE_MASK = 0x7f000000; |
| const int32_t DictionaryData::TRANSFORM_OFFSET_MASK = 0x1fffff; |
| |
| DictionaryMatcher::~DictionaryMatcher() { |
| } |
| |
| UCharsDictionaryMatcher::~UCharsDictionaryMatcher() { |
| udata_close(file); |
| } |
| |
| int32_t UCharsDictionaryMatcher::getType() const { |
| return DictionaryData::TRIE_TYPE_UCHARS; |
| } |
| |
| int32_t UCharsDictionaryMatcher::matches(UText *text, int32_t maxLength, int32_t limit, |
| int32_t *lengths, int32_t *cpLengths, int32_t *values, |
| int32_t *prefix) const { |
| |
| UCharsTrie uct(characters); |
| int32_t startingTextIndex = utext_getNativeIndex(text); |
| int32_t wordCount = 0; |
| int32_t codePointsMatched = 0; |
| |
| for (UChar32 c = utext_next32(text); c >= 0; c=utext_next32(text)) { |
| UStringTrieResult result = (codePointsMatched == 0) ? uct.first(c) : uct.next(c); |
| int32_t lengthMatched = utext_getNativeIndex(text) - startingTextIndex; |
| codePointsMatched += 1; |
| if (USTRINGTRIE_HAS_VALUE(result)) { |
| if (wordCount < limit) { |
| if (values != NULL) { |
| values[wordCount] = uct.getValue(); |
| } |
| if (lengths != NULL) { |
| lengths[wordCount] = lengthMatched; |
| } |
| if (cpLengths != NULL) { |
| cpLengths[wordCount] = codePointsMatched; |
| } |
| ++wordCount; |
| } |
| if (result == USTRINGTRIE_FINAL_VALUE) { |
| break; |
| } |
| } |
| else if (result == USTRINGTRIE_NO_MATCH) { |
| break; |
| } |
| if (lengthMatched >= maxLength) { |
| break; |
| } |
| } |
| |
| if (prefix != NULL) { |
| *prefix = codePointsMatched; |
| } |
| return wordCount; |
| } |
| |
| BytesDictionaryMatcher::~BytesDictionaryMatcher() { |
| udata_close(file); |
| } |
| |
| UChar32 BytesDictionaryMatcher::transform(UChar32 c) const { |
| if ((transformConstant & DictionaryData::TRANSFORM_TYPE_MASK) == DictionaryData::TRANSFORM_TYPE_OFFSET) { |
| if (c == 0x200D) { |
| return 0xFF; |
| } else if (c == 0x200C) { |
| return 0xFE; |
| } |
| int32_t delta = c - (transformConstant & DictionaryData::TRANSFORM_OFFSET_MASK); |
| if (delta < 0 || 0xFD < delta) { |
| return U_SENTINEL; |
| } |
| return (UChar32)delta; |
| } |
| return c; |
| } |
| |
| int32_t BytesDictionaryMatcher::getType() const { |
| return DictionaryData::TRIE_TYPE_BYTES; |
| } |
| |
| int32_t BytesDictionaryMatcher::matches(UText *text, int32_t maxLength, int32_t limit, |
| int32_t *lengths, int32_t *cpLengths, int32_t *values, |
| int32_t *prefix) const { |
| BytesTrie bt(characters); |
| int32_t startingTextIndex = utext_getNativeIndex(text); |
| int32_t wordCount = 0; |
| int32_t codePointsMatched = 0; |
| |
| for (UChar32 c = utext_next32(text); c >= 0; c=utext_next32(text)) { |
| UStringTrieResult result = (codePointsMatched == 0) ? bt.first(transform(c)) : bt.next(transform(c)); |
| int32_t lengthMatched = utext_getNativeIndex(text) - startingTextIndex; |
| codePointsMatched += 1; |
| if (USTRINGTRIE_HAS_VALUE(result)) { |
| if (wordCount < limit) { |
| if (values != NULL) { |
| values[wordCount] = bt.getValue(); |
| } |
| if (lengths != NULL) { |
| lengths[wordCount] = lengthMatched; |
| } |
| if (cpLengths != NULL) { |
| cpLengths[wordCount] = codePointsMatched; |
| } |
| ++wordCount; |
| } |
| if (result == USTRINGTRIE_FINAL_VALUE) { |
| break; |
| } |
| } |
| else if (result == USTRINGTRIE_NO_MATCH) { |
| break; |
| } |
| if (lengthMatched >= maxLength) { |
| break; |
| } |
| } |
| |
| if (prefix != NULL) { |
| *prefix = codePointsMatched; |
| } |
| return wordCount; |
| } |
| |
| |
| U_NAMESPACE_END |
| |
| U_NAMESPACE_USE |
| |
| U_CAPI int32_t U_EXPORT2 |
| udict_swap(const UDataSwapper *ds, const void *inData, int32_t length, |
| void *outData, UErrorCode *pErrorCode) { |
| const UDataInfo *pInfo; |
| int32_t headerSize; |
| const uint8_t *inBytes; |
| uint8_t *outBytes; |
| const int32_t *inIndexes; |
| int32_t indexes[DictionaryData::IX_COUNT]; |
| int32_t i, offset, size; |
| |
| headerSize = udata_swapDataHeader(ds, inData, length, outData, pErrorCode); |
| if (pErrorCode == NULL || U_FAILURE(*pErrorCode)) return 0; |
| pInfo = (const UDataInfo *)((const char *)inData + 4); |
| if (!(pInfo->dataFormat[0] == 0x44 && |
| pInfo->dataFormat[1] == 0x69 && |
| pInfo->dataFormat[2] == 0x63 && |
| pInfo->dataFormat[3] == 0x74 && |
| pInfo->formatVersion[0] == 1)) { |
| udata_printError(ds, "udict_swap(): data format %02x.%02x.%02x.%02x (format version %02x) is not recognized as dictionary data\n", |
| pInfo->dataFormat[0], pInfo->dataFormat[1], pInfo->dataFormat[2], pInfo->dataFormat[3], pInfo->formatVersion[0]); |
| *pErrorCode = U_UNSUPPORTED_ERROR; |
| return 0; |
| } |
| |
| inBytes = (const uint8_t *)inData + headerSize; |
| outBytes = (uint8_t *)outData + headerSize; |
| |
| inIndexes = (const int32_t *)inBytes; |
| if (length >= 0) { |
| length -= headerSize; |
| if (length < (int32_t)(sizeof(indexes))) { |
| udata_printError(ds, "udict_swap(): too few bytes (%d after header) for dictionary data\n", length); |
| *pErrorCode = U_INDEX_OUTOFBOUNDS_ERROR; |
| return 0; |
| } |
| } |
| |
| for (i = 0; i < DictionaryData::IX_COUNT; i++) { |
| indexes[i] = udata_readInt32(ds, inIndexes[i]); |
| } |
| |
| size = indexes[DictionaryData::IX_TOTAL_SIZE]; |
| |
| if (length >= 0) { |
| if (length < size) { |
| udata_printError(ds, "udict_swap(): too few bytes (%d after header) for all of dictionary data\n", length); |
| *pErrorCode = U_INDEX_OUTOFBOUNDS_ERROR; |
| return 0; |
| } |
| |
| if (inBytes != outBytes) { |
| uprv_memcpy(outBytes, inBytes, size); |
| } |
| |
| offset = 0; |
| ds->swapArray32(ds, inBytes, sizeof(indexes), outBytes, pErrorCode); |
| offset = (int32_t)sizeof(indexes); |
| int32_t trieType = indexes[DictionaryData::IX_TRIE_TYPE] & DictionaryData::TRIE_TYPE_MASK; |
| int32_t nextOffset = indexes[DictionaryData::IX_RESERVED1_OFFSET]; |
| |
| if (trieType == DictionaryData::TRIE_TYPE_UCHARS) { |
| ds->swapArray16(ds, inBytes + offset, nextOffset - offset, outBytes + offset, pErrorCode); |
| } else if (trieType == DictionaryData::TRIE_TYPE_BYTES) { |
| // nothing to do |
| } else { |
| udata_printError(ds, "udict_swap(): unknown trie type!\n"); |
| *pErrorCode = U_UNSUPPORTED_ERROR; |
| return 0; |
| } |
| |
| // these next two sections are empty in the current format, |
| // but may be used later. |
| offset = nextOffset; |
| nextOffset = indexes[DictionaryData::IX_RESERVED2_OFFSET]; |
| offset = nextOffset; |
| nextOffset = indexes[DictionaryData::IX_TOTAL_SIZE]; |
| offset = nextOffset; |
| } |
| return headerSize + size; |
| } |
| #endif |
