1098 lines
42 KiB
C++
1098 lines
42 KiB
C++
/*
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*******************************************************************************
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* Copyright (C) 2013-2015, International Business Machines
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* Corporation and others. All Rights Reserved.
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*******************************************************************************
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* collationfastlatin.cpp
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*
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* created on: 2013aug18
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* created by: Markus W. Scherer
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*/
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_COLLATION
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#include "unicode/ucol.h"
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#include "collationdata.h"
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#include "collationfastlatin.h"
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#include "collationsettings.h"
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#include "uassert.h"
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U_NAMESPACE_BEGIN
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int32_t
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CollationFastLatin::getOptions(const CollationData *data, const CollationSettings &settings,
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uint16_t *primaries, int32_t capacity) {
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const uint16_t *table = data->fastLatinTable;
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if(table == NULL) { return -1; }
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U_ASSERT(capacity == LATIN_LIMIT);
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if(capacity != LATIN_LIMIT) { return -1; }
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uint32_t miniVarTop;
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if((settings.options & CollationSettings::ALTERNATE_MASK) == 0) {
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// No mini primaries are variable, set a variableTop just below the
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// lowest long mini primary.
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miniVarTop = MIN_LONG - 1;
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} else {
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int32_t headerLength = *table & 0xff;
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int32_t i = 1 + settings.getMaxVariable();
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if(i >= headerLength) {
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return -1; // variableTop >= digits, should not occur
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}
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miniVarTop = table[i];
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}
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UBool digitsAreReordered = FALSE;
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if(settings.hasReordering()) {
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uint32_t prevStart = 0;
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uint32_t beforeDigitStart = 0;
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uint32_t digitStart = 0;
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uint32_t afterDigitStart = 0;
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for(int32_t group = UCOL_REORDER_CODE_FIRST;
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group < UCOL_REORDER_CODE_FIRST + CollationData::MAX_NUM_SPECIAL_REORDER_CODES;
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++group) {
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uint32_t start = data->getFirstPrimaryForGroup(group);
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start = settings.reorder(start);
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if(group == UCOL_REORDER_CODE_DIGIT) {
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beforeDigitStart = prevStart;
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digitStart = start;
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} else if(start != 0) {
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if(start < prevStart) {
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// The permutation affects the groups up to Latin.
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return -1;
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}
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// In the future, there might be a special group between digits & Latin.
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if(digitStart != 0 && afterDigitStart == 0 && prevStart == beforeDigitStart) {
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afterDigitStart = start;
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}
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prevStart = start;
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}
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}
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uint32_t latinStart = data->getFirstPrimaryForGroup(USCRIPT_LATIN);
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latinStart = settings.reorder(latinStart);
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if(latinStart < prevStart) {
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return -1;
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}
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if(afterDigitStart == 0) {
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afterDigitStart = latinStart;
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}
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if(!(beforeDigitStart < digitStart && digitStart < afterDigitStart)) {
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digitsAreReordered = TRUE;
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}
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}
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table += (table[0] & 0xff); // skip the header
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for(UChar32 c = 0; c < LATIN_LIMIT; ++c) {
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uint32_t p = table[c];
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if(p >= MIN_SHORT) {
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p &= SHORT_PRIMARY_MASK;
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} else if(p > miniVarTop) {
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p &= LONG_PRIMARY_MASK;
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} else {
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p = 0;
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}
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primaries[c] = (uint16_t)p;
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}
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if(digitsAreReordered || (settings.options & CollationSettings::NUMERIC) != 0) {
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// Bail out for digits.
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for(UChar32 c = 0x30; c <= 0x39; ++c) { primaries[c] = 0; }
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}
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// Shift the miniVarTop above other options.
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return ((int32_t)miniVarTop << 16) | settings.options;
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}
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int32_t
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CollationFastLatin::compareUTF16(const uint16_t *table, const uint16_t *primaries, int32_t options,
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const UChar *left, int32_t leftLength,
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const UChar *right, int32_t rightLength) {
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// This is a modified copy of CollationCompare::compareUpToQuaternary(),
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// optimized for common Latin text.
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// Keep them in sync!
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// Keep compareUTF16() and compareUTF8() in sync very closely!
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U_ASSERT((table[0] >> 8) == VERSION);
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table += (table[0] & 0xff); // skip the header
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uint32_t variableTop = (uint32_t)options >> 16; // see getOptions()
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options &= 0xffff; // needed for CollationSettings::getStrength() to work
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// Check for supported characters, fetch mini CEs, and compare primaries.
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int32_t leftIndex = 0, rightIndex = 0;
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/**
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* Single mini CE or a pair.
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* The current mini CE is in the lower 16 bits, the next one is in the upper 16 bits.
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* If there is only one, then it is in the lower bits, and the upper bits are 0.
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*/
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uint32_t leftPair = 0, rightPair = 0;
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for(;;) {
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// We fetch CEs until we get a non-ignorable primary or reach the end.
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while(leftPair == 0) {
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if(leftIndex == leftLength) {
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leftPair = EOS;
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break;
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}
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UChar32 c = left[leftIndex++];
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if(c <= LATIN_MAX) {
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leftPair = primaries[c];
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if(leftPair != 0) { break; }
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if(c <= 0x39 && c >= 0x30 && (options & CollationSettings::NUMERIC) != 0) {
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return BAIL_OUT_RESULT;
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}
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leftPair = table[c];
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} else if(PUNCT_START <= c && c < PUNCT_LIMIT) {
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leftPair = table[c - PUNCT_START + LATIN_LIMIT];
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} else {
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leftPair = lookup(table, c);
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}
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if(leftPair >= MIN_SHORT) {
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leftPair &= SHORT_PRIMARY_MASK;
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break;
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} else if(leftPair > variableTop) {
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leftPair &= LONG_PRIMARY_MASK;
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break;
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} else {
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leftPair = nextPair(table, c, leftPair, left, NULL, leftIndex, leftLength);
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if(leftPair == BAIL_OUT) { return BAIL_OUT_RESULT; }
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leftPair = getPrimaries(variableTop, leftPair);
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}
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}
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while(rightPair == 0) {
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if(rightIndex == rightLength) {
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rightPair = EOS;
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break;
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}
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UChar32 c = right[rightIndex++];
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if(c <= LATIN_MAX) {
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rightPair = primaries[c];
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if(rightPair != 0) { break; }
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if(c <= 0x39 && c >= 0x30 && (options & CollationSettings::NUMERIC) != 0) {
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return BAIL_OUT_RESULT;
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}
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rightPair = table[c];
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} else if(PUNCT_START <= c && c < PUNCT_LIMIT) {
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rightPair = table[c - PUNCT_START + LATIN_LIMIT];
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} else {
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rightPair = lookup(table, c);
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}
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if(rightPair >= MIN_SHORT) {
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rightPair &= SHORT_PRIMARY_MASK;
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break;
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} else if(rightPair > variableTop) {
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rightPair &= LONG_PRIMARY_MASK;
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break;
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} else {
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rightPair = nextPair(table, c, rightPair, right, NULL, rightIndex, rightLength);
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if(rightPair == BAIL_OUT) { return BAIL_OUT_RESULT; }
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rightPair = getPrimaries(variableTop, rightPair);
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}
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}
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if(leftPair == rightPair) {
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if(leftPair == EOS) { break; }
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leftPair = rightPair = 0;
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continue;
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}
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uint32_t leftPrimary = leftPair & 0xffff;
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uint32_t rightPrimary = rightPair & 0xffff;
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if(leftPrimary != rightPrimary) {
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// Return the primary difference.
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return (leftPrimary < rightPrimary) ? UCOL_LESS : UCOL_GREATER;
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}
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if(leftPair == EOS) { break; }
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leftPair >>= 16;
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rightPair >>= 16;
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}
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// In the following, we need to re-fetch each character because we did not buffer the CEs,
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// but we know that the string is well-formed and
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// only contains supported characters and mappings.
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// We might skip the secondary level but continue with the case level
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// which is turned on separately.
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if(CollationSettings::getStrength(options) >= UCOL_SECONDARY) {
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leftIndex = rightIndex = 0;
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leftPair = rightPair = 0;
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for(;;) {
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while(leftPair == 0) {
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if(leftIndex == leftLength) {
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leftPair = EOS;
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break;
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}
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UChar32 c = left[leftIndex++];
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if(c <= LATIN_MAX) {
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leftPair = table[c];
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} else if(PUNCT_START <= c && c < PUNCT_LIMIT) {
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leftPair = table[c - PUNCT_START + LATIN_LIMIT];
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} else {
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leftPair = lookup(table, c);
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}
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if(leftPair >= MIN_SHORT) {
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leftPair = getSecondariesFromOneShortCE(leftPair);
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break;
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} else if(leftPair > variableTop) {
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leftPair = COMMON_SEC_PLUS_OFFSET;
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break;
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} else {
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leftPair = nextPair(table, c, leftPair, left, NULL, leftIndex, leftLength);
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leftPair = getSecondaries(variableTop, leftPair);
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}
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}
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while(rightPair == 0) {
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if(rightIndex == rightLength) {
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rightPair = EOS;
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break;
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}
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UChar32 c = right[rightIndex++];
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if(c <= LATIN_MAX) {
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rightPair = table[c];
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} else if(PUNCT_START <= c && c < PUNCT_LIMIT) {
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rightPair = table[c - PUNCT_START + LATIN_LIMIT];
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} else {
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rightPair = lookup(table, c);
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}
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if(rightPair >= MIN_SHORT) {
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rightPair = getSecondariesFromOneShortCE(rightPair);
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break;
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} else if(rightPair > variableTop) {
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rightPair = COMMON_SEC_PLUS_OFFSET;
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break;
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} else {
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rightPair = nextPair(table, c, rightPair, right, NULL, rightIndex, rightLength);
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rightPair = getSecondaries(variableTop, rightPair);
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}
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}
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if(leftPair == rightPair) {
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if(leftPair == EOS) { break; }
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leftPair = rightPair = 0;
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continue;
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}
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uint32_t leftSecondary = leftPair & 0xffff;
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uint32_t rightSecondary = rightPair & 0xffff;
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if(leftSecondary != rightSecondary) {
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if((options & CollationSettings::BACKWARD_SECONDARY) != 0) {
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// Full support for backwards secondary requires backwards contraction matching
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// and moving backwards between merge separators.
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return BAIL_OUT_RESULT;
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}
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return (leftSecondary < rightSecondary) ? UCOL_LESS : UCOL_GREATER;
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}
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if(leftPair == EOS) { break; }
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leftPair >>= 16;
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rightPair >>= 16;
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}
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}
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if((options & CollationSettings::CASE_LEVEL) != 0) {
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UBool strengthIsPrimary = CollationSettings::getStrength(options) == UCOL_PRIMARY;
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leftIndex = rightIndex = 0;
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leftPair = rightPair = 0;
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for(;;) {
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while(leftPair == 0) {
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if(leftIndex == leftLength) {
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leftPair = EOS;
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break;
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}
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UChar32 c = left[leftIndex++];
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leftPair = (c <= LATIN_MAX) ? table[c] : lookup(table, c);
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if(leftPair < MIN_LONG) {
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leftPair = nextPair(table, c, leftPair, left, NULL, leftIndex, leftLength);
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}
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leftPair = getCases(variableTop, strengthIsPrimary, leftPair);
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}
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while(rightPair == 0) {
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if(rightIndex == rightLength) {
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rightPair = EOS;
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break;
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}
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UChar32 c = right[rightIndex++];
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rightPair = (c <= LATIN_MAX) ? table[c] : lookup(table, c);
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if(rightPair < MIN_LONG) {
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rightPair = nextPair(table, c, rightPair, right, NULL, rightIndex, rightLength);
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}
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rightPair = getCases(variableTop, strengthIsPrimary, rightPair);
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}
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if(leftPair == rightPair) {
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if(leftPair == EOS) { break; }
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leftPair = rightPair = 0;
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continue;
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}
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uint32_t leftCase = leftPair & 0xffff;
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uint32_t rightCase = rightPair & 0xffff;
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if(leftCase != rightCase) {
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if((options & CollationSettings::UPPER_FIRST) == 0) {
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return (leftCase < rightCase) ? UCOL_LESS : UCOL_GREATER;
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} else {
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return (leftCase < rightCase) ? UCOL_GREATER : UCOL_LESS;
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}
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}
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if(leftPair == EOS) { break; }
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leftPair >>= 16;
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rightPair >>= 16;
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}
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}
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if(CollationSettings::getStrength(options) <= UCOL_SECONDARY) { return UCOL_EQUAL; }
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// Remove the case bits from the tertiary weight when caseLevel is on or caseFirst is off.
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UBool withCaseBits = CollationSettings::isTertiaryWithCaseBits(options);
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leftIndex = rightIndex = 0;
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leftPair = rightPair = 0;
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for(;;) {
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while(leftPair == 0) {
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if(leftIndex == leftLength) {
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leftPair = EOS;
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break;
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}
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UChar32 c = left[leftIndex++];
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leftPair = (c <= LATIN_MAX) ? table[c] : lookup(table, c);
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if(leftPair < MIN_LONG) {
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leftPair = nextPair(table, c, leftPair, left, NULL, leftIndex, leftLength);
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}
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leftPair = getTertiaries(variableTop, withCaseBits, leftPair);
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}
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while(rightPair == 0) {
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if(rightIndex == rightLength) {
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rightPair = EOS;
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break;
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}
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UChar32 c = right[rightIndex++];
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rightPair = (c <= LATIN_MAX) ? table[c] : lookup(table, c);
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if(rightPair < MIN_LONG) {
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rightPair = nextPair(table, c, rightPair, right, NULL, rightIndex, rightLength);
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}
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rightPair = getTertiaries(variableTop, withCaseBits, rightPair);
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}
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if(leftPair == rightPair) {
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if(leftPair == EOS) { break; }
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leftPair = rightPair = 0;
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continue;
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}
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uint32_t leftTertiary = leftPair & 0xffff;
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uint32_t rightTertiary = rightPair & 0xffff;
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if(leftTertiary != rightTertiary) {
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if(CollationSettings::sortsTertiaryUpperCaseFirst(options)) {
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// Pass through EOS and MERGE_WEIGHT
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// and keep real tertiary weights larger than the MERGE_WEIGHT.
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// Tertiary CEs (secondary ignorables) are not supported in fast Latin.
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if(leftTertiary > MERGE_WEIGHT) {
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leftTertiary ^= CASE_MASK;
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}
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if(rightTertiary > MERGE_WEIGHT) {
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rightTertiary ^= CASE_MASK;
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}
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}
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return (leftTertiary < rightTertiary) ? UCOL_LESS : UCOL_GREATER;
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}
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if(leftPair == EOS) { break; }
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leftPair >>= 16;
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rightPair >>= 16;
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}
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if(CollationSettings::getStrength(options) <= UCOL_TERTIARY) { return UCOL_EQUAL; }
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leftIndex = rightIndex = 0;
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leftPair = rightPair = 0;
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for(;;) {
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while(leftPair == 0) {
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if(leftIndex == leftLength) {
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leftPair = EOS;
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break;
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}
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UChar32 c = left[leftIndex++];
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leftPair = (c <= LATIN_MAX) ? table[c] : lookup(table, c);
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if(leftPair < MIN_LONG) {
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leftPair = nextPair(table, c, leftPair, left, NULL, leftIndex, leftLength);
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}
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leftPair = getQuaternaries(variableTop, leftPair);
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}
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while(rightPair == 0) {
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if(rightIndex == rightLength) {
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rightPair = EOS;
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break;
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}
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UChar32 c = right[rightIndex++];
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rightPair = (c <= LATIN_MAX) ? table[c] : lookup(table, c);
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if(rightPair < MIN_LONG) {
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rightPair = nextPair(table, c, rightPair, right, NULL, rightIndex, rightLength);
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}
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rightPair = getQuaternaries(variableTop, rightPair);
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}
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if(leftPair == rightPair) {
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if(leftPair == EOS) { break; }
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leftPair = rightPair = 0;
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continue;
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}
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uint32_t leftQuaternary = leftPair & 0xffff;
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uint32_t rightQuaternary = rightPair & 0xffff;
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if(leftQuaternary != rightQuaternary) {
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return (leftQuaternary < rightQuaternary) ? UCOL_LESS : UCOL_GREATER;
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}
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if(leftPair == EOS) { break; }
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leftPair >>= 16;
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rightPair >>= 16;
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}
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return UCOL_EQUAL;
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}
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int32_t
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CollationFastLatin::compareUTF8(const uint16_t *table, const uint16_t *primaries, int32_t options,
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const uint8_t *left, int32_t leftLength,
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const uint8_t *right, int32_t rightLength) {
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// Keep compareUTF16() and compareUTF8() in sync very closely!
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U_ASSERT((table[0] >> 8) == VERSION);
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table += (table[0] & 0xff); // skip the header
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uint32_t variableTop = (uint32_t)options >> 16; // see RuleBasedCollator::getFastLatinOptions()
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options &= 0xffff; // needed for CollationSettings::getStrength() to work
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|
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// Check for supported characters, fetch mini CEs, and compare primaries.
|
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int32_t leftIndex = 0, rightIndex = 0;
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/**
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* Single mini CE or a pair.
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* The current mini CE is in the lower 16 bits, the next one is in the upper 16 bits.
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* If there is only one, then it is in the lower bits, and the upper bits are 0.
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*/
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uint32_t leftPair = 0, rightPair = 0;
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// Note: There is no need to assemble the code point.
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// We only need to look up the table entry for the character,
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// and nextPair() looks for whether c==0.
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for(;;) {
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// We fetch CEs until we get a non-ignorable primary or reach the end.
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while(leftPair == 0) {
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if(leftIndex == leftLength) {
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leftPair = EOS;
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break;
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}
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UChar32 c = left[leftIndex++];
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uint8_t t;
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if(c <= 0x7f) {
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leftPair = primaries[c];
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if(leftPair != 0) { break; }
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if(c <= 0x39 && c >= 0x30 && (options & CollationSettings::NUMERIC) != 0) {
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return BAIL_OUT_RESULT;
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}
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leftPair = table[c];
|
|
} else if(c <= LATIN_MAX_UTF8_LEAD && 0xc2 <= c && leftIndex != leftLength &&
|
|
0x80 <= (t = left[leftIndex]) && t <= 0xbf) {
|
|
++leftIndex;
|
|
c = ((c - 0xc2) << 6) + t;
|
|
leftPair = primaries[c];
|
|
if(leftPair != 0) { break; }
|
|
leftPair = table[c];
|
|
} else {
|
|
leftPair = lookupUTF8(table, c, left, leftIndex, leftLength);
|
|
}
|
|
if(leftPair >= MIN_SHORT) {
|
|
leftPair &= SHORT_PRIMARY_MASK;
|
|
break;
|
|
} else if(leftPair > variableTop) {
|
|
leftPair &= LONG_PRIMARY_MASK;
|
|
break;
|
|
} else {
|
|
leftPair = nextPair(table, c, leftPair, NULL, left, leftIndex, leftLength);
|
|
if(leftPair == BAIL_OUT) { return BAIL_OUT_RESULT; }
|
|
leftPair = getPrimaries(variableTop, leftPair);
|
|
}
|
|
}
|
|
|
|
while(rightPair == 0) {
|
|
if(rightIndex == rightLength) {
|
|
rightPair = EOS;
|
|
break;
|
|
}
|
|
UChar32 c = right[rightIndex++];
|
|
uint8_t t;
|
|
if(c <= 0x7f) {
|
|
rightPair = primaries[c];
|
|
if(rightPair != 0) { break; }
|
|
if(c <= 0x39 && c >= 0x30 && (options & CollationSettings::NUMERIC) != 0) {
|
|
return BAIL_OUT_RESULT;
|
|
}
|
|
rightPair = table[c];
|
|
} else if(c <= LATIN_MAX_UTF8_LEAD && 0xc2 <= c && rightIndex != rightLength &&
|
|
0x80 <= (t = right[rightIndex]) && t <= 0xbf) {
|
|
++rightIndex;
|
|
c = ((c - 0xc2) << 6) + t;
|
|
rightPair = primaries[c];
|
|
if(rightPair != 0) { break; }
|
|
rightPair = table[c];
|
|
} else {
|
|
rightPair = lookupUTF8(table, c, right, rightIndex, rightLength);
|
|
}
|
|
if(rightPair >= MIN_SHORT) {
|
|
rightPair &= SHORT_PRIMARY_MASK;
|
|
break;
|
|
} else if(rightPair > variableTop) {
|
|
rightPair &= LONG_PRIMARY_MASK;
|
|
break;
|
|
} else {
|
|
rightPair = nextPair(table, c, rightPair, NULL, right, rightIndex, rightLength);
|
|
if(rightPair == BAIL_OUT) { return BAIL_OUT_RESULT; }
|
|
rightPair = getPrimaries(variableTop, rightPair);
|
|
}
|
|
}
|
|
|
|
if(leftPair == rightPair) {
|
|
if(leftPair == EOS) { break; }
|
|
leftPair = rightPair = 0;
|
|
continue;
|
|
}
|
|
uint32_t leftPrimary = leftPair & 0xffff;
|
|
uint32_t rightPrimary = rightPair & 0xffff;
|
|
if(leftPrimary != rightPrimary) {
|
|
// Return the primary difference.
|
|
return (leftPrimary < rightPrimary) ? UCOL_LESS : UCOL_GREATER;
|
|
}
|
|
if(leftPair == EOS) { break; }
|
|
leftPair >>= 16;
|
|
rightPair >>= 16;
|
|
}
|
|
// In the following, we need to re-fetch each character because we did not buffer the CEs,
|
|
// but we know that the string is well-formed and
|
|
// only contains supported characters and mappings.
|
|
|
|
// We might skip the secondary level but continue with the case level
|
|
// which is turned on separately.
|
|
if(CollationSettings::getStrength(options) >= UCOL_SECONDARY) {
|
|
leftIndex = rightIndex = 0;
|
|
leftPair = rightPair = 0;
|
|
for(;;) {
|
|
while(leftPair == 0) {
|
|
if(leftIndex == leftLength) {
|
|
leftPair = EOS;
|
|
break;
|
|
}
|
|
UChar32 c = left[leftIndex++];
|
|
if(c <= 0x7f) {
|
|
leftPair = table[c];
|
|
} else if(c <= LATIN_MAX_UTF8_LEAD) {
|
|
leftPair = table[((c - 0xc2) << 6) + left[leftIndex++]];
|
|
} else {
|
|
leftPair = lookupUTF8Unsafe(table, c, left, leftIndex);
|
|
}
|
|
if(leftPair >= MIN_SHORT) {
|
|
leftPair = getSecondariesFromOneShortCE(leftPair);
|
|
break;
|
|
} else if(leftPair > variableTop) {
|
|
leftPair = COMMON_SEC_PLUS_OFFSET;
|
|
break;
|
|
} else {
|
|
leftPair = nextPair(table, c, leftPair, NULL, left, leftIndex, leftLength);
|
|
leftPair = getSecondaries(variableTop, leftPair);
|
|
}
|
|
}
|
|
|
|
while(rightPair == 0) {
|
|
if(rightIndex == rightLength) {
|
|
rightPair = EOS;
|
|
break;
|
|
}
|
|
UChar32 c = right[rightIndex++];
|
|
if(c <= 0x7f) {
|
|
rightPair = table[c];
|
|
} else if(c <= LATIN_MAX_UTF8_LEAD) {
|
|
rightPair = table[((c - 0xc2) << 6) + right[rightIndex++]];
|
|
} else {
|
|
rightPair = lookupUTF8Unsafe(table, c, right, rightIndex);
|
|
}
|
|
if(rightPair >= MIN_SHORT) {
|
|
rightPair = getSecondariesFromOneShortCE(rightPair);
|
|
break;
|
|
} else if(rightPair > variableTop) {
|
|
rightPair = COMMON_SEC_PLUS_OFFSET;
|
|
break;
|
|
} else {
|
|
rightPair = nextPair(table, c, rightPair, NULL, right, rightIndex, rightLength);
|
|
rightPair = getSecondaries(variableTop, rightPair);
|
|
}
|
|
}
|
|
|
|
if(leftPair == rightPair) {
|
|
if(leftPair == EOS) { break; }
|
|
leftPair = rightPair = 0;
|
|
continue;
|
|
}
|
|
uint32_t leftSecondary = leftPair & 0xffff;
|
|
uint32_t rightSecondary = rightPair & 0xffff;
|
|
if(leftSecondary != rightSecondary) {
|
|
if((options & CollationSettings::BACKWARD_SECONDARY) != 0) {
|
|
// Full support for backwards secondary requires backwards contraction matching
|
|
// and moving backwards between merge separators.
|
|
return BAIL_OUT_RESULT;
|
|
}
|
|
return (leftSecondary < rightSecondary) ? UCOL_LESS : UCOL_GREATER;
|
|
}
|
|
if(leftPair == EOS) { break; }
|
|
leftPair >>= 16;
|
|
rightPair >>= 16;
|
|
}
|
|
}
|
|
|
|
if((options & CollationSettings::CASE_LEVEL) != 0) {
|
|
UBool strengthIsPrimary = CollationSettings::getStrength(options) == UCOL_PRIMARY;
|
|
leftIndex = rightIndex = 0;
|
|
leftPair = rightPair = 0;
|
|
for(;;) {
|
|
while(leftPair == 0) {
|
|
if(leftIndex == leftLength) {
|
|
leftPair = EOS;
|
|
break;
|
|
}
|
|
UChar32 c = left[leftIndex++];
|
|
leftPair = (c <= 0x7f) ? table[c] : lookupUTF8Unsafe(table, c, left, leftIndex);
|
|
if(leftPair < MIN_LONG) {
|
|
leftPair = nextPair(table, c, leftPair, NULL, left, leftIndex, leftLength);
|
|
}
|
|
leftPair = getCases(variableTop, strengthIsPrimary, leftPair);
|
|
}
|
|
|
|
while(rightPair == 0) {
|
|
if(rightIndex == rightLength) {
|
|
rightPair = EOS;
|
|
break;
|
|
}
|
|
UChar32 c = right[rightIndex++];
|
|
rightPair = (c <= 0x7f) ? table[c] : lookupUTF8Unsafe(table, c, right, rightIndex);
|
|
if(rightPair < MIN_LONG) {
|
|
rightPair = nextPair(table, c, rightPair, NULL, right, rightIndex, rightLength);
|
|
}
|
|
rightPair = getCases(variableTop, strengthIsPrimary, rightPair);
|
|
}
|
|
|
|
if(leftPair == rightPair) {
|
|
if(leftPair == EOS) { break; }
|
|
leftPair = rightPair = 0;
|
|
continue;
|
|
}
|
|
uint32_t leftCase = leftPair & 0xffff;
|
|
uint32_t rightCase = rightPair & 0xffff;
|
|
if(leftCase != rightCase) {
|
|
if((options & CollationSettings::UPPER_FIRST) == 0) {
|
|
return (leftCase < rightCase) ? UCOL_LESS : UCOL_GREATER;
|
|
} else {
|
|
return (leftCase < rightCase) ? UCOL_GREATER : UCOL_LESS;
|
|
}
|
|
}
|
|
if(leftPair == EOS) { break; }
|
|
leftPair >>= 16;
|
|
rightPair >>= 16;
|
|
}
|
|
}
|
|
if(CollationSettings::getStrength(options) <= UCOL_SECONDARY) { return UCOL_EQUAL; }
|
|
|
|
// Remove the case bits from the tertiary weight when caseLevel is on or caseFirst is off.
|
|
UBool withCaseBits = CollationSettings::isTertiaryWithCaseBits(options);
|
|
|
|
leftIndex = rightIndex = 0;
|
|
leftPair = rightPair = 0;
|
|
for(;;) {
|
|
while(leftPair == 0) {
|
|
if(leftIndex == leftLength) {
|
|
leftPair = EOS;
|
|
break;
|
|
}
|
|
UChar32 c = left[leftIndex++];
|
|
leftPair = (c <= 0x7f) ? table[c] : lookupUTF8Unsafe(table, c, left, leftIndex);
|
|
if(leftPair < MIN_LONG) {
|
|
leftPair = nextPair(table, c, leftPair, NULL, left, leftIndex, leftLength);
|
|
}
|
|
leftPair = getTertiaries(variableTop, withCaseBits, leftPair);
|
|
}
|
|
|
|
while(rightPair == 0) {
|
|
if(rightIndex == rightLength) {
|
|
rightPair = EOS;
|
|
break;
|
|
}
|
|
UChar32 c = right[rightIndex++];
|
|
rightPair = (c <= 0x7f) ? table[c] : lookupUTF8Unsafe(table, c, right, rightIndex);
|
|
if(rightPair < MIN_LONG) {
|
|
rightPair = nextPair(table, c, rightPair, NULL, right, rightIndex, rightLength);
|
|
}
|
|
rightPair = getTertiaries(variableTop, withCaseBits, rightPair);
|
|
}
|
|
|
|
if(leftPair == rightPair) {
|
|
if(leftPair == EOS) { break; }
|
|
leftPair = rightPair = 0;
|
|
continue;
|
|
}
|
|
uint32_t leftTertiary = leftPair & 0xffff;
|
|
uint32_t rightTertiary = rightPair & 0xffff;
|
|
if(leftTertiary != rightTertiary) {
|
|
if(CollationSettings::sortsTertiaryUpperCaseFirst(options)) {
|
|
// Pass through EOS and MERGE_WEIGHT
|
|
// and keep real tertiary weights larger than the MERGE_WEIGHT.
|
|
// Tertiary CEs (secondary ignorables) are not supported in fast Latin.
|
|
if(leftTertiary > MERGE_WEIGHT) {
|
|
leftTertiary ^= CASE_MASK;
|
|
}
|
|
if(rightTertiary > MERGE_WEIGHT) {
|
|
rightTertiary ^= CASE_MASK;
|
|
}
|
|
}
|
|
return (leftTertiary < rightTertiary) ? UCOL_LESS : UCOL_GREATER;
|
|
}
|
|
if(leftPair == EOS) { break; }
|
|
leftPair >>= 16;
|
|
rightPair >>= 16;
|
|
}
|
|
if(CollationSettings::getStrength(options) <= UCOL_TERTIARY) { return UCOL_EQUAL; }
|
|
|
|
leftIndex = rightIndex = 0;
|
|
leftPair = rightPair = 0;
|
|
for(;;) {
|
|
while(leftPair == 0) {
|
|
if(leftIndex == leftLength) {
|
|
leftPair = EOS;
|
|
break;
|
|
}
|
|
UChar32 c = left[leftIndex++];
|
|
leftPair = (c <= 0x7f) ? table[c] : lookupUTF8Unsafe(table, c, left, leftIndex);
|
|
if(leftPair < MIN_LONG) {
|
|
leftPair = nextPair(table, c, leftPair, NULL, left, leftIndex, leftLength);
|
|
}
|
|
leftPair = getQuaternaries(variableTop, leftPair);
|
|
}
|
|
|
|
while(rightPair == 0) {
|
|
if(rightIndex == rightLength) {
|
|
rightPair = EOS;
|
|
break;
|
|
}
|
|
UChar32 c = right[rightIndex++];
|
|
rightPair = (c <= 0x7f) ? table[c] : lookupUTF8Unsafe(table, c, right, rightIndex);
|
|
if(rightPair < MIN_LONG) {
|
|
rightPair = nextPair(table, c, rightPair, NULL, right, rightIndex, rightLength);
|
|
}
|
|
rightPair = getQuaternaries(variableTop, rightPair);
|
|
}
|
|
|
|
if(leftPair == rightPair) {
|
|
if(leftPair == EOS) { break; }
|
|
leftPair = rightPair = 0;
|
|
continue;
|
|
}
|
|
uint32_t leftQuaternary = leftPair & 0xffff;
|
|
uint32_t rightQuaternary = rightPair & 0xffff;
|
|
if(leftQuaternary != rightQuaternary) {
|
|
return (leftQuaternary < rightQuaternary) ? UCOL_LESS : UCOL_GREATER;
|
|
}
|
|
if(leftPair == EOS) { break; }
|
|
leftPair >>= 16;
|
|
rightPair >>= 16;
|
|
}
|
|
return UCOL_EQUAL;
|
|
}
|
|
|
|
uint32_t
|
|
CollationFastLatin::lookup(const uint16_t *table, UChar32 c) {
|
|
U_ASSERT(c > LATIN_MAX);
|
|
if(PUNCT_START <= c && c < PUNCT_LIMIT) {
|
|
return table[c - PUNCT_START + LATIN_LIMIT];
|
|
} else if(c == 0xfffe) {
|
|
return MERGE_WEIGHT;
|
|
} else if(c == 0xffff) {
|
|
return MAX_SHORT | COMMON_SEC | LOWER_CASE | COMMON_TER;
|
|
} else {
|
|
return BAIL_OUT;
|
|
}
|
|
}
|
|
|
|
uint32_t
|
|
CollationFastLatin::lookupUTF8(const uint16_t *table, UChar32 c,
|
|
const uint8_t *s8, int32_t &sIndex, int32_t sLength) {
|
|
// The caller handled ASCII and valid/supported Latin.
|
|
U_ASSERT(c > 0x7f);
|
|
int32_t i2 = sIndex + 1;
|
|
if(i2 < sLength || sLength < 0) {
|
|
uint8_t t1 = s8[sIndex];
|
|
uint8_t t2 = s8[i2];
|
|
sIndex += 2;
|
|
if(c == 0xe2 && t1 == 0x80 && 0x80 <= t2 && t2 <= 0xbf) {
|
|
return table[(LATIN_LIMIT - 0x80) + t2]; // 2000..203F -> 0180..01BF
|
|
} else if(c == 0xef && t1 == 0xbf) {
|
|
if(t2 == 0xbe) {
|
|
return MERGE_WEIGHT; // U+FFFE
|
|
} else if(t2 == 0xbf) {
|
|
return MAX_SHORT | COMMON_SEC | LOWER_CASE | COMMON_TER; // U+FFFF
|
|
}
|
|
}
|
|
}
|
|
return BAIL_OUT;
|
|
}
|
|
|
|
uint32_t
|
|
CollationFastLatin::lookupUTF8Unsafe(const uint16_t *table, UChar32 c,
|
|
const uint8_t *s8, int32_t &sIndex) {
|
|
// The caller handled ASCII.
|
|
// The string is well-formed and contains only supported characters.
|
|
U_ASSERT(c > 0x7f);
|
|
if(c <= LATIN_MAX_UTF8_LEAD) {
|
|
return table[((c - 0xc2) << 6) + s8[sIndex++]]; // 0080..017F
|
|
}
|
|
uint8_t t2 = s8[sIndex + 1];
|
|
sIndex += 2;
|
|
if(c == 0xe2) {
|
|
return table[(LATIN_LIMIT - 0x80) + t2]; // 2000..203F -> 0180..01BF
|
|
} else if(t2 == 0xbe) {
|
|
return MERGE_WEIGHT; // U+FFFE
|
|
} else {
|
|
return MAX_SHORT | COMMON_SEC | LOWER_CASE | COMMON_TER; // U+FFFF
|
|
}
|
|
}
|
|
|
|
uint32_t
|
|
CollationFastLatin::nextPair(const uint16_t *table, UChar32 c, uint32_t ce,
|
|
const UChar *s16, const uint8_t *s8, int32_t &sIndex, int32_t &sLength) {
|
|
if(ce >= MIN_LONG || ce < CONTRACTION) {
|
|
return ce; // simple or special mini CE
|
|
} else if(ce >= EXPANSION) {
|
|
int32_t index = NUM_FAST_CHARS + (ce & INDEX_MASK);
|
|
return ((uint32_t)table[index + 1] << 16) | table[index];
|
|
} else /* ce >= CONTRACTION */ {
|
|
if(c == 0 && sLength < 0) {
|
|
sLength = sIndex - 1;
|
|
return EOS;
|
|
}
|
|
// Contraction list: Default mapping followed by
|
|
// 0 or more single-character contraction suffix mappings.
|
|
int32_t index = NUM_FAST_CHARS + (ce & INDEX_MASK);
|
|
if(sIndex != sLength) {
|
|
// Read the next character.
|
|
int32_t c2;
|
|
int32_t nextIndex = sIndex;
|
|
if(s16 != NULL) {
|
|
c2 = s16[nextIndex++];
|
|
if(c2 > LATIN_MAX) {
|
|
if(PUNCT_START <= c2 && c2 < PUNCT_LIMIT) {
|
|
c2 = c2 - PUNCT_START + LATIN_LIMIT; // 2000..203F -> 0180..01BF
|
|
} else if(c2 == 0xfffe || c2 == 0xffff) {
|
|
c2 = -1; // U+FFFE & U+FFFF cannot occur in contractions.
|
|
} else {
|
|
return BAIL_OUT;
|
|
}
|
|
}
|
|
} else {
|
|
c2 = s8[nextIndex++];
|
|
if(c2 > 0x7f) {
|
|
uint8_t t;
|
|
if(c2 <= 0xc5 && 0xc2 <= c2 && nextIndex != sLength &&
|
|
0x80 <= (t = s8[nextIndex]) && t <= 0xbf) {
|
|
c2 = ((c2 - 0xc2) << 6) + t; // 0080..017F
|
|
++nextIndex;
|
|
} else {
|
|
int32_t i2 = nextIndex + 1;
|
|
if(i2 < sLength || sLength < 0) {
|
|
if(c2 == 0xe2 && s8[nextIndex] == 0x80 &&
|
|
0x80 <= (t = s8[i2]) && t <= 0xbf) {
|
|
c2 = (LATIN_LIMIT - 0x80) + t; // 2000..203F -> 0180..01BF
|
|
} else if(c2 == 0xef && s8[nextIndex] == 0xbf &&
|
|
((t = s8[i2]) == 0xbe || t == 0xbf)) {
|
|
c2 = -1; // U+FFFE & U+FFFF cannot occur in contractions.
|
|
} else {
|
|
return BAIL_OUT;
|
|
}
|
|
} else {
|
|
return BAIL_OUT;
|
|
}
|
|
nextIndex += 2;
|
|
}
|
|
}
|
|
}
|
|
if(c2 == 0 && sLength < 0) {
|
|
sLength = sIndex;
|
|
c2 = -1;
|
|
}
|
|
// Look for the next character in the contraction suffix list,
|
|
// which is in ascending order of single suffix characters.
|
|
int32_t i = index;
|
|
int32_t head = table[i]; // first skip the default mapping
|
|
int32_t x;
|
|
do {
|
|
i += head >> CONTR_LENGTH_SHIFT;
|
|
head = table[i];
|
|
x = head & CONTR_CHAR_MASK;
|
|
} while(x < c2);
|
|
if(x == c2) {
|
|
index = i;
|
|
sIndex = nextIndex;
|
|
}
|
|
}
|
|
// Return the CE or CEs for the default or contraction mapping.
|
|
int32_t length = table[index] >> CONTR_LENGTH_SHIFT;
|
|
if(length == 1) {
|
|
return BAIL_OUT;
|
|
}
|
|
ce = table[index + 1];
|
|
if(length == 2) {
|
|
return ce;
|
|
} else {
|
|
return ((uint32_t)table[index + 2] << 16) | ce;
|
|
}
|
|
}
|
|
}
|
|
|
|
uint32_t
|
|
CollationFastLatin::getSecondaries(uint32_t variableTop, uint32_t pair) {
|
|
if(pair <= 0xffff) {
|
|
// one mini CE
|
|
if(pair >= MIN_SHORT) {
|
|
pair = getSecondariesFromOneShortCE(pair);
|
|
} else if(pair > variableTop) {
|
|
pair = COMMON_SEC_PLUS_OFFSET;
|
|
} else if(pair >= MIN_LONG) {
|
|
pair = 0; // variable
|
|
}
|
|
// else special mini CE
|
|
} else {
|
|
uint32_t ce = pair & 0xffff;
|
|
if(ce >= MIN_SHORT) {
|
|
pair = (pair & TWO_SECONDARIES_MASK) + TWO_SEC_OFFSETS;
|
|
} else if(ce > variableTop) {
|
|
pair = TWO_COMMON_SEC_PLUS_OFFSET;
|
|
} else {
|
|
U_ASSERT(ce >= MIN_LONG);
|
|
pair = 0; // variable
|
|
}
|
|
}
|
|
return pair;
|
|
}
|
|
|
|
uint32_t
|
|
CollationFastLatin::getCases(uint32_t variableTop, UBool strengthIsPrimary, uint32_t pair) {
|
|
// Primary+caseLevel: Ignore case level weights of primary ignorables.
|
|
// Otherwise: Ignore case level weights of secondary ignorables.
|
|
// For details see the comments in the CollationCompare class.
|
|
// Tertiary CEs (secondary ignorables) are not supported in fast Latin.
|
|
if(pair <= 0xffff) {
|
|
// one mini CE
|
|
if(pair >= MIN_SHORT) {
|
|
// A high secondary weight means we really have two CEs,
|
|
// a primary CE and a secondary CE.
|
|
uint32_t ce = pair;
|
|
pair &= CASE_MASK; // explicit weight of primary CE
|
|
if(!strengthIsPrimary && (ce & SECONDARY_MASK) >= MIN_SEC_HIGH) {
|
|
pair |= LOWER_CASE << 16; // implied weight of secondary CE
|
|
}
|
|
} else if(pair > variableTop) {
|
|
pair = LOWER_CASE;
|
|
} else if(pair >= MIN_LONG) {
|
|
pair = 0; // variable
|
|
}
|
|
// else special mini CE
|
|
} else {
|
|
// two mini CEs, same primary groups, neither expands like above
|
|
uint32_t ce = pair & 0xffff;
|
|
if(ce >= MIN_SHORT) {
|
|
if(strengthIsPrimary && (pair & (SHORT_PRIMARY_MASK << 16)) == 0) {
|
|
pair &= CASE_MASK;
|
|
} else {
|
|
pair &= TWO_CASES_MASK;
|
|
}
|
|
} else if(ce > variableTop) {
|
|
pair = TWO_LOWER_CASES;
|
|
} else {
|
|
U_ASSERT(ce >= MIN_LONG);
|
|
pair = 0; // variable
|
|
}
|
|
}
|
|
return pair;
|
|
}
|
|
|
|
uint32_t
|
|
CollationFastLatin::getTertiaries(uint32_t variableTop, UBool withCaseBits, uint32_t pair) {
|
|
if(pair <= 0xffff) {
|
|
// one mini CE
|
|
if(pair >= MIN_SHORT) {
|
|
// A high secondary weight means we really have two CEs,
|
|
// a primary CE and a secondary CE.
|
|
uint32_t ce = pair;
|
|
if(withCaseBits) {
|
|
pair = (pair & CASE_AND_TERTIARY_MASK) + TER_OFFSET;
|
|
if((ce & SECONDARY_MASK) >= MIN_SEC_HIGH) {
|
|
pair |= (LOWER_CASE | COMMON_TER_PLUS_OFFSET) << 16;
|
|
}
|
|
} else {
|
|
pair = (pair & TERTIARY_MASK) + TER_OFFSET;
|
|
if((ce & SECONDARY_MASK) >= MIN_SEC_HIGH) {
|
|
pair |= COMMON_TER_PLUS_OFFSET << 16;
|
|
}
|
|
}
|
|
} else if(pair > variableTop) {
|
|
pair = (pair & TERTIARY_MASK) + TER_OFFSET;
|
|
if(withCaseBits) {
|
|
pair |= LOWER_CASE;
|
|
}
|
|
} else if(pair >= MIN_LONG) {
|
|
pair = 0; // variable
|
|
}
|
|
// else special mini CE
|
|
} else {
|
|
// two mini CEs, same primary groups, neither expands like above
|
|
uint32_t ce = pair & 0xffff;
|
|
if(ce >= MIN_SHORT) {
|
|
if(withCaseBits) {
|
|
pair &= TWO_CASES_MASK | TWO_TERTIARIES_MASK;
|
|
} else {
|
|
pair &= TWO_TERTIARIES_MASK;
|
|
}
|
|
pair += TWO_TER_OFFSETS;
|
|
} else if(ce > variableTop) {
|
|
pair = (pair & TWO_TERTIARIES_MASK) + TWO_TER_OFFSETS;
|
|
if(withCaseBits) {
|
|
pair |= TWO_LOWER_CASES;
|
|
}
|
|
} else {
|
|
U_ASSERT(ce >= MIN_LONG);
|
|
pair = 0; // variable
|
|
}
|
|
}
|
|
return pair;
|
|
}
|
|
|
|
uint32_t
|
|
CollationFastLatin::getQuaternaries(uint32_t variableTop, uint32_t pair) {
|
|
// Return the primary weight of a variable CE,
|
|
// or the maximum primary weight for a non-variable, not-completely-ignorable CE.
|
|
if(pair <= 0xffff) {
|
|
// one mini CE
|
|
if(pair >= MIN_SHORT) {
|
|
// A high secondary weight means we really have two CEs,
|
|
// a primary CE and a secondary CE.
|
|
if((pair & SECONDARY_MASK) >= MIN_SEC_HIGH) {
|
|
pair = TWO_SHORT_PRIMARIES_MASK;
|
|
} else {
|
|
pair = SHORT_PRIMARY_MASK;
|
|
}
|
|
} else if(pair > variableTop) {
|
|
pair = SHORT_PRIMARY_MASK;
|
|
} else if(pair >= MIN_LONG) {
|
|
pair &= LONG_PRIMARY_MASK; // variable
|
|
}
|
|
// else special mini CE
|
|
} else {
|
|
// two mini CEs, same primary groups, neither expands like above
|
|
uint32_t ce = pair & 0xffff;
|
|
if(ce > variableTop) {
|
|
pair = TWO_SHORT_PRIMARIES_MASK;
|
|
} else {
|
|
U_ASSERT(ce >= MIN_LONG);
|
|
pair &= TWO_LONG_PRIMARIES_MASK; // variable
|
|
}
|
|
}
|
|
return pair;
|
|
}
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif // !UCONFIG_NO_COLLATION
|