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Diffstat (limited to 'deps/node/deps/icu-small/source/i18n/collationdatabuilder.cpp')
-rw-r--r-- | deps/node/deps/icu-small/source/i18n/collationdatabuilder.cpp | 1535 |
1 files changed, 0 insertions, 1535 deletions
diff --git a/deps/node/deps/icu-small/source/i18n/collationdatabuilder.cpp b/deps/node/deps/icu-small/source/i18n/collationdatabuilder.cpp deleted file mode 100644 index 1ebc2031..00000000 --- a/deps/node/deps/icu-small/source/i18n/collationdatabuilder.cpp +++ /dev/null @@ -1,1535 +0,0 @@ -// © 2016 and later: Unicode, Inc. and others. -// License & terms of use: http://www.unicode.org/copyright.html -/* -******************************************************************************* -* Copyright (C) 2012-2015, International Business Machines -* Corporation and others. All Rights Reserved. -******************************************************************************* -* collationdatabuilder.cpp -* -* (replaced the former ucol_elm.cpp) -* -* created on: 2012apr01 -* created by: Markus W. Scherer -*/ - -#include "unicode/utypes.h" - -#if !UCONFIG_NO_COLLATION - -#include "unicode/localpointer.h" -#include "unicode/uchar.h" -#include "unicode/ucharstrie.h" -#include "unicode/ucharstriebuilder.h" -#include "unicode/uniset.h" -#include "unicode/unistr.h" -#include "unicode/usetiter.h" -#include "unicode/utf16.h" -#include "cmemory.h" -#include "collation.h" -#include "collationdata.h" -#include "collationdatabuilder.h" -#include "collationfastlatinbuilder.h" -#include "collationiterator.h" -#include "normalizer2impl.h" -#include "utrie2.h" -#include "uvectr32.h" -#include "uvectr64.h" -#include "uvector.h" - -U_NAMESPACE_BEGIN - -CollationDataBuilder::CEModifier::~CEModifier() {} - -/** - * Build-time context and CE32 for a code point. - * If a code point has contextual mappings, then the default (no-context) mapping - * and all conditional mappings are stored in a singly-linked list - * of ConditionalCE32, sorted by context strings. - * - * Context strings sort by prefix length, then by prefix, then by contraction suffix. - * Context strings must be unique and in ascending order. - */ -struct ConditionalCE32 : public UMemory { - ConditionalCE32() - : context(), - ce32(0), defaultCE32(Collation::NO_CE32), builtCE32(Collation::NO_CE32), - next(-1) {} - ConditionalCE32(const UnicodeString &ct, uint32_t ce) - : context(ct), - ce32(ce), defaultCE32(Collation::NO_CE32), builtCE32(Collation::NO_CE32), - next(-1) {} - - inline UBool hasContext() const { return context.length() > 1; } - inline int32_t prefixLength() const { return context.charAt(0); } - - /** - * "\0" for the first entry for any code point, with its default CE32. - * - * Otherwise one unit with the length of the prefix string, - * then the prefix string, then the contraction suffix. - */ - UnicodeString context; - /** - * CE32 for the code point and its context. - * Can be special (e.g., for an expansion) but not contextual (prefix or contraction tag). - */ - uint32_t ce32; - /** - * Default CE32 for all contexts with this same prefix. - * Initially NO_CE32. Set only while building runtime data structures, - * and only on one of the nodes of a sub-list with the same prefix. - */ - uint32_t defaultCE32; - /** - * CE32 for the built contexts. - * When fetching CEs from the builder, the contexts are built into their runtime form - * so that the normal collation implementation can process them. - * The result is cached in the list head. It is reset when the contexts are modified. - */ - uint32_t builtCE32; - /** - * Index of the next ConditionalCE32. - * Negative for the end of the list. - */ - int32_t next; -}; - -U_CDECL_BEGIN - -U_CAPI void U_CALLCONV -uprv_deleteConditionalCE32(void *obj) { - delete static_cast<ConditionalCE32 *>(obj); -} - -U_CDECL_END - -/** - * Build-time collation element and character iterator. - * Uses the runtime CollationIterator for fetching CEs for a string - * but reads from the builder's unfinished data structures. - * In particular, this class reads from the unfinished trie - * and has to avoid CollationIterator::nextCE() and redirect other - * calls to data->getCE32() and data->getCE32FromSupplementary(). - * - * We do this so that we need not implement the collation algorithm - * again for the builder and make it behave exactly like the runtime code. - * That would be more difficult to test and maintain than this indirection. - * - * Some CE32 tags (for example, the DIGIT_TAG) do not occur in the builder data, - * so the data accesses from those code paths need not be modified. - * - * This class iterates directly over whole code points - * so that the CollationIterator does not need the finished trie - * for handling the LEAD_SURROGATE_TAG. - */ -class DataBuilderCollationIterator : public CollationIterator { -public: - DataBuilderCollationIterator(CollationDataBuilder &b); - - virtual ~DataBuilderCollationIterator(); - - int32_t fetchCEs(const UnicodeString &str, int32_t start, int64_t ces[], int32_t cesLength); - - virtual void resetToOffset(int32_t newOffset); - virtual int32_t getOffset() const; - - virtual UChar32 nextCodePoint(UErrorCode &errorCode); - virtual UChar32 previousCodePoint(UErrorCode &errorCode); - -protected: - virtual void forwardNumCodePoints(int32_t num, UErrorCode &errorCode); - virtual void backwardNumCodePoints(int32_t num, UErrorCode &errorCode); - - virtual uint32_t getDataCE32(UChar32 c) const; - virtual uint32_t getCE32FromBuilderData(uint32_t ce32, UErrorCode &errorCode); - - CollationDataBuilder &builder; - CollationData builderData; - uint32_t jamoCE32s[CollationData::JAMO_CE32S_LENGTH]; - const UnicodeString *s; - int32_t pos; -}; - -DataBuilderCollationIterator::DataBuilderCollationIterator(CollationDataBuilder &b) - : CollationIterator(&builderData, /*numeric=*/ FALSE), - builder(b), builderData(b.nfcImpl), - s(NULL), pos(0) { - builderData.base = builder.base; - // Set all of the jamoCE32s[] to indirection CE32s. - for(int32_t j = 0; j < CollationData::JAMO_CE32S_LENGTH; ++j) { // Count across Jamo types. - UChar32 jamo = CollationDataBuilder::jamoCpFromIndex(j); - jamoCE32s[j] = Collation::makeCE32FromTagAndIndex(Collation::BUILDER_DATA_TAG, jamo) | - CollationDataBuilder::IS_BUILDER_JAMO_CE32; - } - builderData.jamoCE32s = jamoCE32s; -} - -DataBuilderCollationIterator::~DataBuilderCollationIterator() {} - -int32_t -DataBuilderCollationIterator::fetchCEs(const UnicodeString &str, int32_t start, - int64_t ces[], int32_t cesLength) { - // Set the pointers each time, in case they changed due to reallocation. - builderData.ce32s = reinterpret_cast<const uint32_t *>(builder.ce32s.getBuffer()); - builderData.ces = builder.ce64s.getBuffer(); - builderData.contexts = builder.contexts.getBuffer(); - // Modified copy of CollationIterator::nextCE() and CollationIterator::nextCEFromCE32(). - reset(); - s = &str; - pos = start; - UErrorCode errorCode = U_ZERO_ERROR; - while(U_SUCCESS(errorCode) && pos < s->length()) { - // No need to keep all CEs in the iterator buffer. - clearCEs(); - UChar32 c = s->char32At(pos); - pos += U16_LENGTH(c); - uint32_t ce32 = utrie2_get32(builder.trie, c); - const CollationData *d; - if(ce32 == Collation::FALLBACK_CE32) { - d = builder.base; - ce32 = builder.base->getCE32(c); - } else { - d = &builderData; - } - appendCEsFromCE32(d, c, ce32, /*forward=*/ TRUE, errorCode); - U_ASSERT(U_SUCCESS(errorCode)); - for(int32_t i = 0; i < getCEsLength(); ++i) { - int64_t ce = getCE(i); - if(ce != 0) { - if(cesLength < Collation::MAX_EXPANSION_LENGTH) { - ces[cesLength] = ce; - } - ++cesLength; - } - } - } - return cesLength; -} - -void -DataBuilderCollationIterator::resetToOffset(int32_t newOffset) { - reset(); - pos = newOffset; -} - -int32_t -DataBuilderCollationIterator::getOffset() const { - return pos; -} - -UChar32 -DataBuilderCollationIterator::nextCodePoint(UErrorCode & /*errorCode*/) { - if(pos == s->length()) { - return U_SENTINEL; - } - UChar32 c = s->char32At(pos); - pos += U16_LENGTH(c); - return c; -} - -UChar32 -DataBuilderCollationIterator::previousCodePoint(UErrorCode & /*errorCode*/) { - if(pos == 0) { - return U_SENTINEL; - } - UChar32 c = s->char32At(pos - 1); - pos -= U16_LENGTH(c); - return c; -} - -void -DataBuilderCollationIterator::forwardNumCodePoints(int32_t num, UErrorCode & /*errorCode*/) { - pos = s->moveIndex32(pos, num); -} - -void -DataBuilderCollationIterator::backwardNumCodePoints(int32_t num, UErrorCode & /*errorCode*/) { - pos = s->moveIndex32(pos, -num); -} - -uint32_t -DataBuilderCollationIterator::getDataCE32(UChar32 c) const { - return utrie2_get32(builder.trie, c); -} - -uint32_t -DataBuilderCollationIterator::getCE32FromBuilderData(uint32_t ce32, UErrorCode &errorCode) { - U_ASSERT(Collation::hasCE32Tag(ce32, Collation::BUILDER_DATA_TAG)); - if((ce32 & CollationDataBuilder::IS_BUILDER_JAMO_CE32) != 0) { - UChar32 jamo = Collation::indexFromCE32(ce32); - return utrie2_get32(builder.trie, jamo); - } else { - ConditionalCE32 *cond = builder.getConditionalCE32ForCE32(ce32); - if(cond->builtCE32 == Collation::NO_CE32) { - // Build the context-sensitive mappings into their runtime form and cache the result. - cond->builtCE32 = builder.buildContext(cond, errorCode); - if(errorCode == U_BUFFER_OVERFLOW_ERROR) { - errorCode = U_ZERO_ERROR; - builder.clearContexts(); - cond->builtCE32 = builder.buildContext(cond, errorCode); - } - builderData.contexts = builder.contexts.getBuffer(); - } - return cond->builtCE32; - } -} - -// ------------------------------------------------------------------------- *** - -CollationDataBuilder::CollationDataBuilder(UErrorCode &errorCode) - : nfcImpl(*Normalizer2Factory::getNFCImpl(errorCode)), - base(NULL), baseSettings(NULL), - trie(NULL), - ce32s(errorCode), ce64s(errorCode), conditionalCE32s(errorCode), - modified(FALSE), - fastLatinEnabled(FALSE), fastLatinBuilder(NULL), - collIter(NULL) { - // Reserve the first CE32 for U+0000. - ce32s.addElement(0, errorCode); - conditionalCE32s.setDeleter(uprv_deleteConditionalCE32); -} - -CollationDataBuilder::~CollationDataBuilder() { - utrie2_close(trie); - delete fastLatinBuilder; - delete collIter; -} - -void -CollationDataBuilder::initForTailoring(const CollationData *b, UErrorCode &errorCode) { - if(U_FAILURE(errorCode)) { return; } - if(trie != NULL) { - errorCode = U_INVALID_STATE_ERROR; - return; - } - if(b == NULL) { - errorCode = U_ILLEGAL_ARGUMENT_ERROR; - return; - } - base = b; - - // For a tailoring, the default is to fall back to the base. - trie = utrie2_open(Collation::FALLBACK_CE32, Collation::FFFD_CE32, &errorCode); - - // Set the Latin-1 letters block so that it is allocated first in the data array, - // to try to improve locality of reference when sorting Latin-1 text. - // Do not use utrie2_setRange32() since that will not actually allocate blocks - // that are filled with the default value. - // ASCII (0..7F) is already preallocated anyway. - for(UChar32 c = 0xc0; c <= 0xff; ++c) { - utrie2_set32(trie, c, Collation::FALLBACK_CE32, &errorCode); - } - - // Hangul syllables are not tailorable (except via tailoring Jamos). - // Always set the Hangul tag to help performance. - // Do this here, rather than in buildMappings(), - // so that we see the HANGUL_TAG in various assertions. - uint32_t hangulCE32 = Collation::makeCE32FromTagAndIndex(Collation::HANGUL_TAG, 0); - utrie2_setRange32(trie, Hangul::HANGUL_BASE, Hangul::HANGUL_END, hangulCE32, TRUE, &errorCode); - - // Copy the set contents but don't copy/clone the set as a whole because - // that would copy the isFrozen state too. - unsafeBackwardSet.addAll(*b->unsafeBackwardSet); - - if(U_FAILURE(errorCode)) { return; } -} - -UBool -CollationDataBuilder::maybeSetPrimaryRange(UChar32 start, UChar32 end, - uint32_t primary, int32_t step, - UErrorCode &errorCode) { - if(U_FAILURE(errorCode)) { return FALSE; } - U_ASSERT(start <= end); - // TODO: Do we need to check what values are currently set for start..end? - // An offset range is worth it only if we can achieve an overlap between - // adjacent UTrie2 blocks of 32 code points each. - // An offset CE is also a little more expensive to look up and compute - // than a simple CE. - // If the range spans at least three UTrie2 block boundaries (> 64 code points), - // then we take it. - // If the range spans one or two block boundaries and there are - // at least 4 code points on either side, then we take it. - // (We could additionally require a minimum range length of, say, 16.) - int32_t blockDelta = (end >> 5) - (start >> 5); - if(2 <= step && step <= 0x7f && - (blockDelta >= 3 || - (blockDelta > 0 && (start & 0x1f) <= 0x1c && (end & 0x1f) >= 3))) { - int64_t dataCE = ((int64_t)primary << 32) | (start << 8) | step; - if(isCompressiblePrimary(primary)) { dataCE |= 0x80; } - int32_t index = addCE(dataCE, errorCode); - if(U_FAILURE(errorCode)) { return 0; } - if(index > Collation::MAX_INDEX) { - errorCode = U_BUFFER_OVERFLOW_ERROR; - return 0; - } - uint32_t offsetCE32 = Collation::makeCE32FromTagAndIndex(Collation::OFFSET_TAG, index); - utrie2_setRange32(trie, start, end, offsetCE32, TRUE, &errorCode); - modified = TRUE; - return TRUE; - } else { - return FALSE; - } -} - -uint32_t -CollationDataBuilder::setPrimaryRangeAndReturnNext(UChar32 start, UChar32 end, - uint32_t primary, int32_t step, - UErrorCode &errorCode) { - if(U_FAILURE(errorCode)) { return 0; } - UBool isCompressible = isCompressiblePrimary(primary); - if(maybeSetPrimaryRange(start, end, primary, step, errorCode)) { - return Collation::incThreeBytePrimaryByOffset(primary, isCompressible, - (end - start + 1) * step); - } else { - // Short range: Set individual CE32s. - for(;;) { - utrie2_set32(trie, start, Collation::makeLongPrimaryCE32(primary), &errorCode); - ++start; - primary = Collation::incThreeBytePrimaryByOffset(primary, isCompressible, step); - if(start > end) { return primary; } - } - modified = TRUE; - } -} - -uint32_t -CollationDataBuilder::getCE32FromOffsetCE32(UBool fromBase, UChar32 c, uint32_t ce32) const { - int32_t i = Collation::indexFromCE32(ce32); - int64_t dataCE = fromBase ? base->ces[i] : ce64s.elementAti(i); - uint32_t p = Collation::getThreeBytePrimaryForOffsetData(c, dataCE); - return Collation::makeLongPrimaryCE32(p); -} - -UBool -CollationDataBuilder::isCompressibleLeadByte(uint32_t b) const { - return base->isCompressibleLeadByte(b); -} - -UBool -CollationDataBuilder::isAssigned(UChar32 c) const { - return Collation::isAssignedCE32(utrie2_get32(trie, c)); -} - -uint32_t -CollationDataBuilder::getLongPrimaryIfSingleCE(UChar32 c) const { - uint32_t ce32 = utrie2_get32(trie, c); - if(Collation::isLongPrimaryCE32(ce32)) { - return Collation::primaryFromLongPrimaryCE32(ce32); - } else { - return 0; - } -} - -int64_t -CollationDataBuilder::getSingleCE(UChar32 c, UErrorCode &errorCode) const { - if(U_FAILURE(errorCode)) { return 0; } - // Keep parallel with CollationData::getSingleCE(). - UBool fromBase = FALSE; - uint32_t ce32 = utrie2_get32(trie, c); - if(ce32 == Collation::FALLBACK_CE32) { - fromBase = TRUE; - ce32 = base->getCE32(c); - } - while(Collation::isSpecialCE32(ce32)) { - switch(Collation::tagFromCE32(ce32)) { - case Collation::LATIN_EXPANSION_TAG: - case Collation::BUILDER_DATA_TAG: - case Collation::PREFIX_TAG: - case Collation::CONTRACTION_TAG: - case Collation::HANGUL_TAG: - case Collation::LEAD_SURROGATE_TAG: - errorCode = U_UNSUPPORTED_ERROR; - return 0; - case Collation::FALLBACK_TAG: - case Collation::RESERVED_TAG_3: - errorCode = U_INTERNAL_PROGRAM_ERROR; - return 0; - case Collation::LONG_PRIMARY_TAG: - return Collation::ceFromLongPrimaryCE32(ce32); - case Collation::LONG_SECONDARY_TAG: - return Collation::ceFromLongSecondaryCE32(ce32); - case Collation::EXPANSION32_TAG: - if(Collation::lengthFromCE32(ce32) == 1) { - int32_t i = Collation::indexFromCE32(ce32); - ce32 = fromBase ? base->ce32s[i] : ce32s.elementAti(i); - break; - } else { - errorCode = U_UNSUPPORTED_ERROR; - return 0; - } - case Collation::EXPANSION_TAG: { - if(Collation::lengthFromCE32(ce32) == 1) { - int32_t i = Collation::indexFromCE32(ce32); - return fromBase ? base->ces[i] : ce64s.elementAti(i); - } else { - errorCode = U_UNSUPPORTED_ERROR; - return 0; - } - } - case Collation::DIGIT_TAG: - // Fetch the non-numeric-collation CE32 and continue. - ce32 = ce32s.elementAti(Collation::indexFromCE32(ce32)); - break; - case Collation::U0000_TAG: - U_ASSERT(c == 0); - // Fetch the normal ce32 for U+0000 and continue. - ce32 = fromBase ? base->ce32s[0] : ce32s.elementAti(0); - break; - case Collation::OFFSET_TAG: - ce32 = getCE32FromOffsetCE32(fromBase, c, ce32); - break; - case Collation::IMPLICIT_TAG: - return Collation::unassignedCEFromCodePoint(c); - } - } - return Collation::ceFromSimpleCE32(ce32); -} - -int32_t -CollationDataBuilder::addCE(int64_t ce, UErrorCode &errorCode) { - int32_t length = ce64s.size(); - for(int32_t i = 0; i < length; ++i) { - if(ce == ce64s.elementAti(i)) { return i; } - } - ce64s.addElement(ce, errorCode); - return length; -} - -int32_t -CollationDataBuilder::addCE32(uint32_t ce32, UErrorCode &errorCode) { - int32_t length = ce32s.size(); - for(int32_t i = 0; i < length; ++i) { - if(ce32 == (uint32_t)ce32s.elementAti(i)) { return i; } - } - ce32s.addElement((int32_t)ce32, errorCode); - return length; -} - -int32_t -CollationDataBuilder::addConditionalCE32(const UnicodeString &context, uint32_t ce32, - UErrorCode &errorCode) { - if(U_FAILURE(errorCode)) { return -1; } - U_ASSERT(!context.isEmpty()); - int32_t index = conditionalCE32s.size(); - if(index > Collation::MAX_INDEX) { - errorCode = U_BUFFER_OVERFLOW_ERROR; - return -1; - } - ConditionalCE32 *cond = new ConditionalCE32(context, ce32); - if(cond == NULL) { - errorCode = U_MEMORY_ALLOCATION_ERROR; - return -1; - } - conditionalCE32s.addElement(cond, errorCode); - return index; -} - -void -CollationDataBuilder::add(const UnicodeString &prefix, const UnicodeString &s, - const int64_t ces[], int32_t cesLength, - UErrorCode &errorCode) { - uint32_t ce32 = encodeCEs(ces, cesLength, errorCode); - addCE32(prefix, s, ce32, errorCode); -} - -void -CollationDataBuilder::addCE32(const UnicodeString &prefix, const UnicodeString &s, - uint32_t ce32, UErrorCode &errorCode) { - if(U_FAILURE(errorCode)) { return; } - if(s.isEmpty()) { - errorCode = U_ILLEGAL_ARGUMENT_ERROR; - return; - } - if(trie == NULL || utrie2_isFrozen(trie)) { - errorCode = U_INVALID_STATE_ERROR; - return; - } - UChar32 c = s.char32At(0); - int32_t cLength = U16_LENGTH(c); - uint32_t oldCE32 = utrie2_get32(trie, c); - UBool hasContext = !prefix.isEmpty() || s.length() > cLength; - if(oldCE32 == Collation::FALLBACK_CE32) { - // First tailoring for c. - // If c has contextual base mappings or if we add a contextual mapping, - // then copy the base mappings. - // Otherwise we just override the base mapping. - uint32_t baseCE32 = base->getFinalCE32(base->getCE32(c)); - if(hasContext || Collation::ce32HasContext(baseCE32)) { - oldCE32 = copyFromBaseCE32(c, baseCE32, TRUE, errorCode); - utrie2_set32(trie, c, oldCE32, &errorCode); - if(U_FAILURE(errorCode)) { return; } - } - } - if(!hasContext) { - // No prefix, no contraction. - if(!isBuilderContextCE32(oldCE32)) { - utrie2_set32(trie, c, ce32, &errorCode); - } else { - ConditionalCE32 *cond = getConditionalCE32ForCE32(oldCE32); - cond->builtCE32 = Collation::NO_CE32; - cond->ce32 = ce32; - } - } else { - ConditionalCE32 *cond; - if(!isBuilderContextCE32(oldCE32)) { - // Replace the simple oldCE32 with a builder context CE32 - // pointing to a new ConditionalCE32 list head. - int32_t index = addConditionalCE32(UnicodeString((UChar)0), oldCE32, errorCode); - if(U_FAILURE(errorCode)) { return; } - uint32_t contextCE32 = makeBuilderContextCE32(index); - utrie2_set32(trie, c, contextCE32, &errorCode); - contextChars.add(c); - cond = getConditionalCE32(index); - } else { - cond = getConditionalCE32ForCE32(oldCE32); - cond->builtCE32 = Collation::NO_CE32; - } - UnicodeString suffix(s, cLength); - UnicodeString context((UChar)prefix.length()); - context.append(prefix).append(suffix); - unsafeBackwardSet.addAll(suffix); - for(;;) { - // invariant: context > cond->context - int32_t next = cond->next; - if(next < 0) { - // Append a new ConditionalCE32 after cond. - int32_t index = addConditionalCE32(context, ce32, errorCode); - if(U_FAILURE(errorCode)) { return; } - cond->next = index; - break; - } - ConditionalCE32 *nextCond = getConditionalCE32(next); - int8_t cmp = context.compare(nextCond->context); - if(cmp < 0) { - // Insert a new ConditionalCE32 between cond and nextCond. - int32_t index = addConditionalCE32(context, ce32, errorCode); - if(U_FAILURE(errorCode)) { return; } - cond->next = index; - getConditionalCE32(index)->next = next; - break; - } else if(cmp == 0) { - // Same context as before, overwrite its ce32. - nextCond->ce32 = ce32; - break; - } - cond = nextCond; - } - } - modified = TRUE; -} - -uint32_t -CollationDataBuilder::encodeOneCEAsCE32(int64_t ce) { - uint32_t p = (uint32_t)(ce >> 32); - uint32_t lower32 = (uint32_t)ce; - uint32_t t = (uint32_t)(ce & 0xffff); - U_ASSERT((t & 0xc000) != 0xc000); // Impossible case bits 11 mark special CE32s. - if((ce & INT64_C(0xffff00ff00ff)) == 0) { - // normal form ppppsstt - return p | (lower32 >> 16) | (t >> 8); - } else if((ce & INT64_C(0xffffffffff)) == Collation::COMMON_SEC_AND_TER_CE) { - // long-primary form ppppppC1 - return Collation::makeLongPrimaryCE32(p); - } else if(p == 0 && (t & 0xff) == 0) { - // long-secondary form ssssttC2 - return Collation::makeLongSecondaryCE32(lower32); - } - return Collation::NO_CE32; -} - -uint32_t -CollationDataBuilder::encodeOneCE(int64_t ce, UErrorCode &errorCode) { - // Try to encode one CE as one CE32. - uint32_t ce32 = encodeOneCEAsCE32(ce); - if(ce32 != Collation::NO_CE32) { return ce32; } - int32_t index = addCE(ce, errorCode); - if(U_FAILURE(errorCode)) { return 0; } - if(index > Collation::MAX_INDEX) { - errorCode = U_BUFFER_OVERFLOW_ERROR; - return 0; - } - return Collation::makeCE32FromTagIndexAndLength(Collation::EXPANSION_TAG, index, 1); -} - -uint32_t -CollationDataBuilder::encodeCEs(const int64_t ces[], int32_t cesLength, - UErrorCode &errorCode) { - if(U_FAILURE(errorCode)) { return 0; } - if(cesLength < 0 || cesLength > Collation::MAX_EXPANSION_LENGTH) { - errorCode = U_ILLEGAL_ARGUMENT_ERROR; - return 0; - } - if(trie == NULL || utrie2_isFrozen(trie)) { - errorCode = U_INVALID_STATE_ERROR; - return 0; - } - if(cesLength == 0) { - // Convenience: We cannot map to nothing, but we can map to a completely ignorable CE. - // Do this here so that callers need not do it. - return encodeOneCEAsCE32(0); - } else if(cesLength == 1) { - return encodeOneCE(ces[0], errorCode); - } else if(cesLength == 2) { - // Try to encode two CEs as one CE32. - int64_t ce0 = ces[0]; - int64_t ce1 = ces[1]; - uint32_t p0 = (uint32_t)(ce0 >> 32); - if((ce0 & INT64_C(0xffffffffff00ff)) == Collation::COMMON_SECONDARY_CE && - (ce1 & INT64_C(0xffffffff00ffffff)) == Collation::COMMON_TERTIARY_CE && - p0 != 0) { - // Latin mini expansion - return - p0 | - (((uint32_t)ce0 & 0xff00u) << 8) | - (uint32_t)(ce1 >> 16) | - Collation::SPECIAL_CE32_LOW_BYTE | - Collation::LATIN_EXPANSION_TAG; - } - } - // Try to encode two or more CEs as CE32s. - int32_t newCE32s[Collation::MAX_EXPANSION_LENGTH]; - for(int32_t i = 0;; ++i) { - if(i == cesLength) { - return encodeExpansion32(newCE32s, cesLength, errorCode); - } - uint32_t ce32 = encodeOneCEAsCE32(ces[i]); - if(ce32 == Collation::NO_CE32) { break; } - newCE32s[i] = (int32_t)ce32; - } - return encodeExpansion(ces, cesLength, errorCode); -} - -uint32_t -CollationDataBuilder::encodeExpansion(const int64_t ces[], int32_t length, UErrorCode &errorCode) { - if(U_FAILURE(errorCode)) { return 0; } - // See if this sequence of CEs has already been stored. - int64_t first = ces[0]; - int32_t ce64sMax = ce64s.size() - length; - for(int32_t i = 0; i <= ce64sMax; ++i) { - if(first == ce64s.elementAti(i)) { - if(i > Collation::MAX_INDEX) { - errorCode = U_BUFFER_OVERFLOW_ERROR; - return 0; - } - for(int32_t j = 1;; ++j) { - if(j == length) { - return Collation::makeCE32FromTagIndexAndLength( - Collation::EXPANSION_TAG, i, length); - } - if(ce64s.elementAti(i + j) != ces[j]) { break; } - } - } - } - // Store the new sequence. - int32_t i = ce64s.size(); - if(i > Collation::MAX_INDEX) { - errorCode = U_BUFFER_OVERFLOW_ERROR; - return 0; - } - for(int32_t j = 0; j < length; ++j) { - ce64s.addElement(ces[j], errorCode); - } - return Collation::makeCE32FromTagIndexAndLength(Collation::EXPANSION_TAG, i, length); -} - -uint32_t -CollationDataBuilder::encodeExpansion32(const int32_t newCE32s[], int32_t length, - UErrorCode &errorCode) { - if(U_FAILURE(errorCode)) { return 0; } - // See if this sequence of CE32s has already been stored. - int32_t first = newCE32s[0]; - int32_t ce32sMax = ce32s.size() - length; - for(int32_t i = 0; i <= ce32sMax; ++i) { - if(first == ce32s.elementAti(i)) { - if(i > Collation::MAX_INDEX) { - errorCode = U_BUFFER_OVERFLOW_ERROR; - return 0; - } - for(int32_t j = 1;; ++j) { - if(j == length) { - return Collation::makeCE32FromTagIndexAndLength( - Collation::EXPANSION32_TAG, i, length); - } - if(ce32s.elementAti(i + j) != newCE32s[j]) { break; } - } - } - } - // Store the new sequence. - int32_t i = ce32s.size(); - if(i > Collation::MAX_INDEX) { - errorCode = U_BUFFER_OVERFLOW_ERROR; - return 0; - } - for(int32_t j = 0; j < length; ++j) { - ce32s.addElement(newCE32s[j], errorCode); - } - return Collation::makeCE32FromTagIndexAndLength(Collation::EXPANSION32_TAG, i, length); -} - -uint32_t -CollationDataBuilder::copyFromBaseCE32(UChar32 c, uint32_t ce32, UBool withContext, - UErrorCode &errorCode) { - if(U_FAILURE(errorCode)) { return 0; } - if(!Collation::isSpecialCE32(ce32)) { return ce32; } - switch(Collation::tagFromCE32(ce32)) { - case Collation::LONG_PRIMARY_TAG: - case Collation::LONG_SECONDARY_TAG: - case Collation::LATIN_EXPANSION_TAG: - // copy as is - break; - case Collation::EXPANSION32_TAG: { - const uint32_t *baseCE32s = base->ce32s + Collation::indexFromCE32(ce32); - int32_t length = Collation::lengthFromCE32(ce32); - ce32 = encodeExpansion32( - reinterpret_cast<const int32_t *>(baseCE32s), length, errorCode); - break; - } - case Collation::EXPANSION_TAG: { - const int64_t *baseCEs = base->ces + Collation::indexFromCE32(ce32); - int32_t length = Collation::lengthFromCE32(ce32); - ce32 = encodeExpansion(baseCEs, length, errorCode); - break; - } - case Collation::PREFIX_TAG: { - // Flatten prefixes and nested suffixes (contractions) - // into a linear list of ConditionalCE32. - const UChar *p = base->contexts + Collation::indexFromCE32(ce32); - ce32 = CollationData::readCE32(p); // Default if no prefix match. - if(!withContext) { - return copyFromBaseCE32(c, ce32, FALSE, errorCode); - } - ConditionalCE32 head; - UnicodeString context((UChar)0); - int32_t index; - if(Collation::isContractionCE32(ce32)) { - index = copyContractionsFromBaseCE32(context, c, ce32, &head, errorCode); - } else { - ce32 = copyFromBaseCE32(c, ce32, TRUE, errorCode); - head.next = index = addConditionalCE32(context, ce32, errorCode); - } - if(U_FAILURE(errorCode)) { return 0; } - ConditionalCE32 *cond = getConditionalCE32(index); // the last ConditionalCE32 so far - UCharsTrie::Iterator prefixes(p + 2, 0, errorCode); - while(prefixes.next(errorCode)) { - context = prefixes.getString(); - context.reverse(); - context.insert(0, (UChar)context.length()); - ce32 = (uint32_t)prefixes.getValue(); - if(Collation::isContractionCE32(ce32)) { - index = copyContractionsFromBaseCE32(context, c, ce32, cond, errorCode); - } else { - ce32 = copyFromBaseCE32(c, ce32, TRUE, errorCode); - cond->next = index = addConditionalCE32(context, ce32, errorCode); - } - if(U_FAILURE(errorCode)) { return 0; } - cond = getConditionalCE32(index); - } - ce32 = makeBuilderContextCE32(head.next); - contextChars.add(c); - break; - } - case Collation::CONTRACTION_TAG: { - if(!withContext) { - const UChar *p = base->contexts + Collation::indexFromCE32(ce32); - ce32 = CollationData::readCE32(p); // Default if no suffix match. - return copyFromBaseCE32(c, ce32, FALSE, errorCode); - } - ConditionalCE32 head; - UnicodeString context((UChar)0); - copyContractionsFromBaseCE32(context, c, ce32, &head, errorCode); - ce32 = makeBuilderContextCE32(head.next); - contextChars.add(c); - break; - } - case Collation::HANGUL_TAG: - errorCode = U_UNSUPPORTED_ERROR; // We forbid tailoring of Hangul syllables. - break; - case Collation::OFFSET_TAG: - ce32 = getCE32FromOffsetCE32(TRUE, c, ce32); - break; - case Collation::IMPLICIT_TAG: - ce32 = encodeOneCE(Collation::unassignedCEFromCodePoint(c), errorCode); - break; - default: - U_ASSERT(FALSE); // require ce32 == base->getFinalCE32(ce32) - break; - } - return ce32; -} - -int32_t -CollationDataBuilder::copyContractionsFromBaseCE32(UnicodeString &context, UChar32 c, uint32_t ce32, - ConditionalCE32 *cond, UErrorCode &errorCode) { - if(U_FAILURE(errorCode)) { return 0; } - const UChar *p = base->contexts + Collation::indexFromCE32(ce32); - int32_t index; - if((ce32 & Collation::CONTRACT_SINGLE_CP_NO_MATCH) != 0) { - // No match on the single code point. - // We are underneath a prefix, and the default mapping is just - // a fallback to the mappings for a shorter prefix. - U_ASSERT(context.length() > 1); - index = -1; - } else { - ce32 = CollationData::readCE32(p); // Default if no suffix match. - U_ASSERT(!Collation::isContractionCE32(ce32)); - ce32 = copyFromBaseCE32(c, ce32, TRUE, errorCode); - cond->next = index = addConditionalCE32(context, ce32, errorCode); - if(U_FAILURE(errorCode)) { return 0; } - cond = getConditionalCE32(index); - } - - int32_t suffixStart = context.length(); - UCharsTrie::Iterator suffixes(p + 2, 0, errorCode); - while(suffixes.next(errorCode)) { - context.append(suffixes.getString()); - ce32 = copyFromBaseCE32(c, (uint32_t)suffixes.getValue(), TRUE, errorCode); - cond->next = index = addConditionalCE32(context, ce32, errorCode); - if(U_FAILURE(errorCode)) { return 0; } - // No need to update the unsafeBackwardSet because the tailoring set - // is already a copy of the base set. - cond = getConditionalCE32(index); - context.truncate(suffixStart); - } - U_ASSERT(index >= 0); - return index; -} - -class CopyHelper { -public: - CopyHelper(const CollationDataBuilder &s, CollationDataBuilder &d, - const CollationDataBuilder::CEModifier &m, UErrorCode &initialErrorCode) - : src(s), dest(d), modifier(m), - errorCode(initialErrorCode) {} - - UBool copyRangeCE32(UChar32 start, UChar32 end, uint32_t ce32) { - ce32 = copyCE32(ce32); - utrie2_setRange32(dest.trie, start, end, ce32, TRUE, &errorCode); - if(CollationDataBuilder::isBuilderContextCE32(ce32)) { - dest.contextChars.add(start, end); - } - return U_SUCCESS(errorCode); - } - - uint32_t copyCE32(uint32_t ce32) { - if(!Collation::isSpecialCE32(ce32)) { - int64_t ce = modifier.modifyCE32(ce32); - if(ce != Collation::NO_CE) { - ce32 = dest.encodeOneCE(ce, errorCode); - } - } else { - int32_t tag = Collation::tagFromCE32(ce32); - if(tag == Collation::EXPANSION32_TAG) { - const uint32_t *srcCE32s = reinterpret_cast<uint32_t *>(src.ce32s.getBuffer()); - srcCE32s += Collation::indexFromCE32(ce32); - int32_t length = Collation::lengthFromCE32(ce32); - // Inspect the source CE32s. Just copy them if none are modified. - // Otherwise copy to modifiedCEs, with modifications. - UBool isModified = FALSE; - for(int32_t i = 0; i < length; ++i) { - ce32 = srcCE32s[i]; - int64_t ce; - if(Collation::isSpecialCE32(ce32) || - (ce = modifier.modifyCE32(ce32)) == Collation::NO_CE) { - if(isModified) { - modifiedCEs[i] = Collation::ceFromCE32(ce32); - } - } else { - if(!isModified) { - for(int32_t j = 0; j < i; ++j) { - modifiedCEs[j] = Collation::ceFromCE32(srcCE32s[j]); - } - isModified = TRUE; - } - modifiedCEs[i] = ce; - } - } - if(isModified) { - ce32 = dest.encodeCEs(modifiedCEs, length, errorCode); - } else { - ce32 = dest.encodeExpansion32( - reinterpret_cast<const int32_t *>(srcCE32s), length, errorCode); - } - } else if(tag == Collation::EXPANSION_TAG) { - const int64_t *srcCEs = src.ce64s.getBuffer(); - srcCEs += Collation::indexFromCE32(ce32); - int32_t length = Collation::lengthFromCE32(ce32); - // Inspect the source CEs. Just copy them if none are modified. - // Otherwise copy to modifiedCEs, with modifications. - UBool isModified = FALSE; - for(int32_t i = 0; i < length; ++i) { - int64_t srcCE = srcCEs[i]; - int64_t ce = modifier.modifyCE(srcCE); - if(ce == Collation::NO_CE) { - if(isModified) { - modifiedCEs[i] = srcCE; - } - } else { - if(!isModified) { - for(int32_t j = 0; j < i; ++j) { - modifiedCEs[j] = srcCEs[j]; - } - isModified = TRUE; - } - modifiedCEs[i] = ce; - } - } - if(isModified) { - ce32 = dest.encodeCEs(modifiedCEs, length, errorCode); - } else { - ce32 = dest.encodeExpansion(srcCEs, length, errorCode); - } - } else if(tag == Collation::BUILDER_DATA_TAG) { - // Copy the list of ConditionalCE32. - ConditionalCE32 *cond = src.getConditionalCE32ForCE32(ce32); - U_ASSERT(!cond->hasContext()); - int32_t destIndex = dest.addConditionalCE32( - cond->context, copyCE32(cond->ce32), errorCode); - ce32 = CollationDataBuilder::makeBuilderContextCE32(destIndex); - while(cond->next >= 0) { - cond = src.getConditionalCE32(cond->next); - ConditionalCE32 *prevDestCond = dest.getConditionalCE32(destIndex); - destIndex = dest.addConditionalCE32( - cond->context, copyCE32(cond->ce32), errorCode); - int32_t suffixStart = cond->prefixLength() + 1; - dest.unsafeBackwardSet.addAll(cond->context.tempSubString(suffixStart)); - prevDestCond->next = destIndex; - } - } else { - // Just copy long CEs and Latin mini expansions (and other expected values) as is, - // assuming that the modifier would not modify them. - U_ASSERT(tag == Collation::LONG_PRIMARY_TAG || - tag == Collation::LONG_SECONDARY_TAG || - tag == Collation::LATIN_EXPANSION_TAG || - tag == Collation::HANGUL_TAG); - } - } - return ce32; - } - - const CollationDataBuilder &src; - CollationDataBuilder &dest; - const CollationDataBuilder::CEModifier &modifier; - int64_t modifiedCEs[Collation::MAX_EXPANSION_LENGTH]; - UErrorCode errorCode; -}; - -U_CDECL_BEGIN - -static UBool U_CALLCONV -enumRangeForCopy(const void *context, UChar32 start, UChar32 end, uint32_t value) { - return - value == Collation::UNASSIGNED_CE32 || value == Collation::FALLBACK_CE32 || - ((CopyHelper *)context)->copyRangeCE32(start, end, value); -} - -U_CDECL_END - -void -CollationDataBuilder::copyFrom(const CollationDataBuilder &src, const CEModifier &modifier, - UErrorCode &errorCode) { - if(U_FAILURE(errorCode)) { return; } - if(trie == NULL || utrie2_isFrozen(trie)) { - errorCode = U_INVALID_STATE_ERROR; - return; - } - CopyHelper helper(src, *this, modifier, errorCode); - utrie2_enum(src.trie, NULL, enumRangeForCopy, &helper); - errorCode = helper.errorCode; - // Update the contextChars and the unsafeBackwardSet while copying, - // in case a character had conditional mappings in the source builder - // and they were removed later. - modified |= src.modified; -} - -void -CollationDataBuilder::optimize(const UnicodeSet &set, UErrorCode &errorCode) { - if(U_FAILURE(errorCode) || set.isEmpty()) { return; } - UnicodeSetIterator iter(set); - while(iter.next() && !iter.isString()) { - UChar32 c = iter.getCodepoint(); - uint32_t ce32 = utrie2_get32(trie, c); - if(ce32 == Collation::FALLBACK_CE32) { - ce32 = base->getFinalCE32(base->getCE32(c)); - ce32 = copyFromBaseCE32(c, ce32, TRUE, errorCode); - utrie2_set32(trie, c, ce32, &errorCode); - } - } - modified = TRUE; -} - -void -CollationDataBuilder::suppressContractions(const UnicodeSet &set, UErrorCode &errorCode) { - if(U_FAILURE(errorCode) || set.isEmpty()) { return; } - UnicodeSetIterator iter(set); - while(iter.next() && !iter.isString()) { - UChar32 c = iter.getCodepoint(); - uint32_t ce32 = utrie2_get32(trie, c); - if(ce32 == Collation::FALLBACK_CE32) { - ce32 = base->getFinalCE32(base->getCE32(c)); - if(Collation::ce32HasContext(ce32)) { - ce32 = copyFromBaseCE32(c, ce32, FALSE /* without context */, errorCode); - utrie2_set32(trie, c, ce32, &errorCode); - } - } else if(isBuilderContextCE32(ce32)) { - ce32 = getConditionalCE32ForCE32(ce32)->ce32; - // Simply abandon the list of ConditionalCE32. - // The caller will copy this builder in the end, - // eliminating unreachable data. - utrie2_set32(trie, c, ce32, &errorCode); - contextChars.remove(c); - } - } - modified = TRUE; -} - -UBool -CollationDataBuilder::getJamoCE32s(uint32_t jamoCE32s[], UErrorCode &errorCode) { - if(U_FAILURE(errorCode)) { return FALSE; } - UBool anyJamoAssigned = base == NULL; // always set jamoCE32s in the base data - UBool needToCopyFromBase = FALSE; - for(int32_t j = 0; j < CollationData::JAMO_CE32S_LENGTH; ++j) { // Count across Jamo types. - UChar32 jamo = jamoCpFromIndex(j); - UBool fromBase = FALSE; - uint32_t ce32 = utrie2_get32(trie, jamo); - anyJamoAssigned |= Collation::isAssignedCE32(ce32); - // TODO: Try to prevent [optimize [Jamo]] from counting as anyJamoAssigned. - // (As of CLDR 24 [2013] the Korean tailoring does not optimize conjoining Jamo.) - if(ce32 == Collation::FALLBACK_CE32) { - fromBase = TRUE; - ce32 = base->getCE32(jamo); - } - if(Collation::isSpecialCE32(ce32)) { - switch(Collation::tagFromCE32(ce32)) { - case Collation::LONG_PRIMARY_TAG: - case Collation::LONG_SECONDARY_TAG: - case Collation::LATIN_EXPANSION_TAG: - // Copy the ce32 as-is. - break; - case Collation::EXPANSION32_TAG: - case Collation::EXPANSION_TAG: - case Collation::PREFIX_TAG: - case Collation::CONTRACTION_TAG: - if(fromBase) { - // Defer copying until we know if anyJamoAssigned. - ce32 = Collation::FALLBACK_CE32; - needToCopyFromBase = TRUE; - } - break; - case Collation::IMPLICIT_TAG: - // An unassigned Jamo should only occur in tests with incomplete bases. - U_ASSERT(fromBase); - ce32 = Collation::FALLBACK_CE32; - needToCopyFromBase = TRUE; - break; - case Collation::OFFSET_TAG: - ce32 = getCE32FromOffsetCE32(fromBase, jamo, ce32); - break; - case Collation::FALLBACK_TAG: - case Collation::RESERVED_TAG_3: - case Collation::BUILDER_DATA_TAG: - case Collation::DIGIT_TAG: - case Collation::U0000_TAG: - case Collation::HANGUL_TAG: - case Collation::LEAD_SURROGATE_TAG: - errorCode = U_INTERNAL_PROGRAM_ERROR; - return FALSE; - } - } - jamoCE32s[j] = ce32; - } - if(anyJamoAssigned && needToCopyFromBase) { - for(int32_t j = 0; j < CollationData::JAMO_CE32S_LENGTH; ++j) { - if(jamoCE32s[j] == Collation::FALLBACK_CE32) { - UChar32 jamo = jamoCpFromIndex(j); - jamoCE32s[j] = copyFromBaseCE32(jamo, base->getCE32(jamo), - /*withContext=*/ TRUE, errorCode); - } - } - } - return anyJamoAssigned && U_SUCCESS(errorCode); -} - -void -CollationDataBuilder::setDigitTags(UErrorCode &errorCode) { - UnicodeSet digits(UNICODE_STRING_SIMPLE("[:Nd:]"), errorCode); - if(U_FAILURE(errorCode)) { return; } - UnicodeSetIterator iter(digits); - while(iter.next()) { - U_ASSERT(!iter.isString()); - UChar32 c = iter.getCodepoint(); - uint32_t ce32 = utrie2_get32(trie, c); - if(ce32 != Collation::FALLBACK_CE32 && ce32 != Collation::UNASSIGNED_CE32) { - int32_t index = addCE32(ce32, errorCode); - if(U_FAILURE(errorCode)) { return; } - if(index > Collation::MAX_INDEX) { - errorCode = U_BUFFER_OVERFLOW_ERROR; - return; - } - ce32 = Collation::makeCE32FromTagIndexAndLength( - Collation::DIGIT_TAG, index, u_charDigitValue(c)); - utrie2_set32(trie, c, ce32, &errorCode); - } - } -} - -U_CDECL_BEGIN - -static UBool U_CALLCONV -enumRangeLeadValue(const void *context, UChar32 /*start*/, UChar32 /*end*/, uint32_t value) { - int32_t *pValue = (int32_t *)context; - if(value == Collation::UNASSIGNED_CE32) { - value = Collation::LEAD_ALL_UNASSIGNED; - } else if(value == Collation::FALLBACK_CE32) { - value = Collation::LEAD_ALL_FALLBACK; - } else { - *pValue = Collation::LEAD_MIXED; - return FALSE; - } - if(*pValue < 0) { - *pValue = (int32_t)value; - } else if(*pValue != (int32_t)value) { - *pValue = Collation::LEAD_MIXED; - return FALSE; - } - return TRUE; -} - -U_CDECL_END - -void -CollationDataBuilder::setLeadSurrogates(UErrorCode &errorCode) { - for(UChar lead = 0xd800; lead < 0xdc00; ++lead) { - int32_t value = -1; - utrie2_enumForLeadSurrogate(trie, lead, NULL, enumRangeLeadValue, &value); - utrie2_set32ForLeadSurrogateCodeUnit( - trie, lead, - Collation::makeCE32FromTagAndIndex(Collation::LEAD_SURROGATE_TAG, 0) | (uint32_t)value, - &errorCode); - } -} - -void -CollationDataBuilder::build(CollationData &data, UErrorCode &errorCode) { - buildMappings(data, errorCode); - if(base != NULL) { - data.numericPrimary = base->numericPrimary; - data.compressibleBytes = base->compressibleBytes; - data.numScripts = base->numScripts; - data.scriptsIndex = base->scriptsIndex; - data.scriptStarts = base->scriptStarts; - data.scriptStartsLength = base->scriptStartsLength; - } - buildFastLatinTable(data, errorCode); -} - -void -CollationDataBuilder::buildMappings(CollationData &data, UErrorCode &errorCode) { - if(U_FAILURE(errorCode)) { return; } - if(trie == NULL || utrie2_isFrozen(trie)) { - errorCode = U_INVALID_STATE_ERROR; - return; - } - - buildContexts(errorCode); - - uint32_t jamoCE32s[CollationData::JAMO_CE32S_LENGTH]; - int32_t jamoIndex = -1; - if(getJamoCE32s(jamoCE32s, errorCode)) { - jamoIndex = ce32s.size(); - for(int32_t i = 0; i < CollationData::JAMO_CE32S_LENGTH; ++i) { - ce32s.addElement((int32_t)jamoCE32s[i], errorCode); - } - // Small optimization: Use a bit in the Hangul ce32 - // to indicate that none of the Jamo CE32s are isSpecialCE32() - // (as it should be in the root collator). - // It allows CollationIterator to avoid recursive function calls and per-Jamo tests. - // In order to still have good trie compression and keep this code simple, - // we only set this flag if a whole block of 588 Hangul syllables starting with - // a common leading consonant (Jamo L) has this property. - UBool isAnyJamoVTSpecial = FALSE; - for(int32_t i = Hangul::JAMO_L_COUNT; i < CollationData::JAMO_CE32S_LENGTH; ++i) { - if(Collation::isSpecialCE32(jamoCE32s[i])) { - isAnyJamoVTSpecial = TRUE; - break; - } - } - uint32_t hangulCE32 = Collation::makeCE32FromTagAndIndex(Collation::HANGUL_TAG, 0); - UChar32 c = Hangul::HANGUL_BASE; - for(int32_t i = 0; i < Hangul::JAMO_L_COUNT; ++i) { // iterate over the Jamo L - uint32_t ce32 = hangulCE32; - if(!isAnyJamoVTSpecial && !Collation::isSpecialCE32(jamoCE32s[i])) { - ce32 |= Collation::HANGUL_NO_SPECIAL_JAMO; - } - UChar32 limit = c + Hangul::JAMO_VT_COUNT; - utrie2_setRange32(trie, c, limit - 1, ce32, TRUE, &errorCode); - c = limit; - } - } else { - // Copy the Hangul CE32s from the base in blocks per Jamo L, - // assuming that HANGUL_NO_SPECIAL_JAMO is set or not set for whole blocks. - for(UChar32 c = Hangul::HANGUL_BASE; c < Hangul::HANGUL_LIMIT;) { - uint32_t ce32 = base->getCE32(c); - U_ASSERT(Collation::hasCE32Tag(ce32, Collation::HANGUL_TAG)); - UChar32 limit = c + Hangul::JAMO_VT_COUNT; - utrie2_setRange32(trie, c, limit - 1, ce32, TRUE, &errorCode); - c = limit; - } - } - - setDigitTags(errorCode); - setLeadSurrogates(errorCode); - - // For U+0000, move its normal ce32 into CE32s[0] and set U0000_TAG. - ce32s.setElementAt((int32_t)utrie2_get32(trie, 0), 0); - utrie2_set32(trie, 0, Collation::makeCE32FromTagAndIndex(Collation::U0000_TAG, 0), &errorCode); - - utrie2_freeze(trie, UTRIE2_32_VALUE_BITS, &errorCode); - if(U_FAILURE(errorCode)) { return; } - - // 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(unsafeBackwardSet.containsSome(c, c + 0x3ff)) { - unsafeBackwardSet.add(lead); - } - } - unsafeBackwardSet.freeze(); - - data.trie = trie; - data.ce32s = reinterpret_cast<const uint32_t *>(ce32s.getBuffer()); - data.ces = ce64s.getBuffer(); - data.contexts = contexts.getBuffer(); - - data.ce32sLength = ce32s.size(); - data.cesLength = ce64s.size(); - data.contextsLength = contexts.length(); - - data.base = base; - if(jamoIndex >= 0) { - data.jamoCE32s = data.ce32s + jamoIndex; - } else { - data.jamoCE32s = base->jamoCE32s; - } - data.unsafeBackwardSet = &unsafeBackwardSet; -} - -void -CollationDataBuilder::clearContexts() { - contexts.remove(); - UnicodeSetIterator iter(contextChars); - while(iter.next()) { - U_ASSERT(!iter.isString()); - uint32_t ce32 = utrie2_get32(trie, iter.getCodepoint()); - U_ASSERT(isBuilderContextCE32(ce32)); - getConditionalCE32ForCE32(ce32)->builtCE32 = Collation::NO_CE32; - } -} - -void -CollationDataBuilder::buildContexts(UErrorCode &errorCode) { - if(U_FAILURE(errorCode)) { return; } - // Ignore abandoned lists and the cached builtCE32, - // and build all contexts from scratch. - contexts.remove(); - UnicodeSetIterator iter(contextChars); - while(U_SUCCESS(errorCode) && iter.next()) { - U_ASSERT(!iter.isString()); - UChar32 c = iter.getCodepoint(); - uint32_t ce32 = utrie2_get32(trie, c); - if(!isBuilderContextCE32(ce32)) { - // Impossible: No context data for c in contextChars. - errorCode = U_INTERNAL_PROGRAM_ERROR; - return; - } - ConditionalCE32 *cond = getConditionalCE32ForCE32(ce32); - ce32 = buildContext(cond, errorCode); - utrie2_set32(trie, c, ce32, &errorCode); - } -} - -uint32_t -CollationDataBuilder::buildContext(ConditionalCE32 *head, UErrorCode &errorCode) { - if(U_FAILURE(errorCode)) { return 0; } - // The list head must have no context. - U_ASSERT(!head->hasContext()); - // The list head must be followed by one or more nodes that all do have context. - U_ASSERT(head->next >= 0); - UCharsTrieBuilder prefixBuilder(errorCode); - UCharsTrieBuilder contractionBuilder(errorCode); - for(ConditionalCE32 *cond = head;; cond = getConditionalCE32(cond->next)) { - // After the list head, the prefix or suffix can be empty, but not both. - U_ASSERT(cond == head || cond->hasContext()); - int32_t prefixLength = cond->prefixLength(); - UnicodeString prefix(cond->context, 0, prefixLength + 1); - // Collect all contraction suffixes for one prefix. - ConditionalCE32 *firstCond = cond; - ConditionalCE32 *lastCond = cond; - while(cond->next >= 0 && - (cond = getConditionalCE32(cond->next))->context.startsWith(prefix)) { - lastCond = cond; - } - uint32_t ce32; - int32_t suffixStart = prefixLength + 1; // == prefix.length() - if(lastCond->context.length() == suffixStart) { - // One prefix without contraction suffix. - U_ASSERT(firstCond == lastCond); - ce32 = lastCond->ce32; - cond = lastCond; - } else { - // Build the contractions trie. - contractionBuilder.clear(); - // Entry for an empty suffix, to be stored before the trie. - uint32_t emptySuffixCE32 = 0; - uint32_t flags = 0; - if(firstCond->context.length() == suffixStart) { - // There is a mapping for the prefix and the single character c. (p|c) - // If no other suffix matches, then we return this value. - emptySuffixCE32 = firstCond->ce32; - cond = getConditionalCE32(firstCond->next); - } else { - // There is no mapping for the prefix and just the single character. - // (There is no p|c, only p|cd, p|ce etc.) - flags |= Collation::CONTRACT_SINGLE_CP_NO_MATCH; - // When the prefix matches but none of the prefix-specific suffixes, - // then we fall back to the mappings with the next-longest prefix, - // and ultimately to mappings with no prefix. - // Each fallback might be another set of contractions. - // For example, if there are mappings for ch, p|cd, p|ce, but not for p|c, - // then in text "pch" we find the ch contraction. - for(cond = head;; cond = getConditionalCE32(cond->next)) { - int32_t length = cond->prefixLength(); - if(length == prefixLength) { break; } - if(cond->defaultCE32 != Collation::NO_CE32 && - (length==0 || prefix.endsWith(cond->context, 1, length))) { - emptySuffixCE32 = cond->defaultCE32; - } - } - cond = firstCond; - } - // Optimization: Set a flag when - // the first character of every contraction suffix has lccc!=0. - // Short-circuits contraction matching when a normal letter follows. - flags |= Collation::CONTRACT_NEXT_CCC; - // Add all of the non-empty suffixes into the contraction trie. - for(;;) { - UnicodeString suffix(cond->context, suffixStart); - uint16_t fcd16 = nfcImpl.getFCD16(suffix.char32At(0)); - if(fcd16 <= 0xff) { - flags &= ~Collation::CONTRACT_NEXT_CCC; - } - fcd16 = nfcImpl.getFCD16(suffix.char32At(suffix.length() - 1)); - if(fcd16 > 0xff) { - // The last suffix character has lccc!=0, allowing for discontiguous contractions. - flags |= Collation::CONTRACT_TRAILING_CCC; - } - contractionBuilder.add(suffix, (int32_t)cond->ce32, errorCode); - if(cond == lastCond) { break; } - cond = getConditionalCE32(cond->next); - } - int32_t index = addContextTrie(emptySuffixCE32, contractionBuilder, errorCode); - if(U_FAILURE(errorCode)) { return 0; } - if(index > Collation::MAX_INDEX) { - errorCode = U_BUFFER_OVERFLOW_ERROR; - return 0; - } - ce32 = Collation::makeCE32FromTagAndIndex(Collation::CONTRACTION_TAG, index) | flags; - } - U_ASSERT(cond == lastCond); - firstCond->defaultCE32 = ce32; - if(prefixLength == 0) { - if(cond->next < 0) { - // No non-empty prefixes, only contractions. - return ce32; - } - } else { - prefix.remove(0, 1); // Remove the length unit. - prefix.reverse(); - prefixBuilder.add(prefix, (int32_t)ce32, errorCode); - if(cond->next < 0) { break; } - } - } - U_ASSERT(head->defaultCE32 != Collation::NO_CE32); - int32_t index = addContextTrie(head->defaultCE32, prefixBuilder, errorCode); - if(U_FAILURE(errorCode)) { return 0; } - if(index > Collation::MAX_INDEX) { - errorCode = U_BUFFER_OVERFLOW_ERROR; - return 0; - } - return Collation::makeCE32FromTagAndIndex(Collation::PREFIX_TAG, index); -} - -int32_t -CollationDataBuilder::addContextTrie(uint32_t defaultCE32, UCharsTrieBuilder &trieBuilder, - UErrorCode &errorCode) { - UnicodeString context; - context.append((UChar)(defaultCE32 >> 16)).append((UChar)defaultCE32); - UnicodeString trieString; - context.append(trieBuilder.buildUnicodeString(USTRINGTRIE_BUILD_SMALL, trieString, errorCode)); - if(U_FAILURE(errorCode)) { return -1; } - int32_t index = contexts.indexOf(context); - if(index < 0) { - index = contexts.length(); - contexts.append(context); - } - return index; -} - -void -CollationDataBuilder::buildFastLatinTable(CollationData &data, UErrorCode &errorCode) { - if(U_FAILURE(errorCode) || !fastLatinEnabled) { return; } - - delete fastLatinBuilder; - fastLatinBuilder = new CollationFastLatinBuilder(errorCode); - if(fastLatinBuilder == NULL) { - errorCode = U_MEMORY_ALLOCATION_ERROR; - return; - } - if(fastLatinBuilder->forData(data, errorCode)) { - const uint16_t *table = fastLatinBuilder->getTable(); - int32_t length = fastLatinBuilder->lengthOfTable(); - if(base != NULL && length == base->fastLatinTableLength && - uprv_memcmp(table, base->fastLatinTable, length * 2) == 0) { - // Same fast Latin table as in the base, use that one instead. - delete fastLatinBuilder; - fastLatinBuilder = NULL; - table = base->fastLatinTable; - } - data.fastLatinTable = table; - data.fastLatinTableLength = length; - } else { - delete fastLatinBuilder; - fastLatinBuilder = NULL; - } -} - -int32_t -CollationDataBuilder::getCEs(const UnicodeString &s, int64_t ces[], int32_t cesLength) { - return getCEs(s, 0, ces, cesLength); -} - -int32_t -CollationDataBuilder::getCEs(const UnicodeString &prefix, const UnicodeString &s, - int64_t ces[], int32_t cesLength) { - int32_t prefixLength = prefix.length(); - if(prefixLength == 0) { - return getCEs(s, 0, ces, cesLength); - } else { - return getCEs(prefix + s, prefixLength, ces, cesLength); - } -} - -int32_t -CollationDataBuilder::getCEs(const UnicodeString &s, int32_t start, - int64_t ces[], int32_t cesLength) { - if(collIter == NULL) { - collIter = new DataBuilderCollationIterator(*this); - if(collIter == NULL) { return 0; } - } - return collIter->fetchCEs(s, start, ces, cesLength); -} - -U_NAMESPACE_END - -#endif // !UCONFIG_NO_COLLATION |