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2807 lines
106 KiB
C++
2807 lines
106 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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*
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* Copyright (C) 2009-2014, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: normalizer2impl.cpp
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* encoding: UTF-8
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2009nov22
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* created by: Markus W. Scherer
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*/
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// #define UCPTRIE_DEBUG
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_NORMALIZATION
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#include "unicode/bytestream.h"
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#include "unicode/edits.h"
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#include "unicode/normalizer2.h"
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#include "unicode/stringoptions.h"
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#include "unicode/ucptrie.h"
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#include "unicode/udata.h"
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#include "unicode/umutablecptrie.h"
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#include "unicode/ustring.h"
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#include "unicode/utf16.h"
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#include "unicode/utf8.h"
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#include "bytesinkutil.h"
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#include "cmemory.h"
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#include "mutex.h"
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#include "normalizer2impl.h"
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#include "putilimp.h"
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#include "uassert.h"
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#include "ucptrie_impl.h"
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#include "uset_imp.h"
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#include "uvector.h"
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U_NAMESPACE_BEGIN
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namespace {
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/**
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* UTF-8 lead byte for minNoMaybeCP.
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* Can be lower than the actual lead byte for c.
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* Typically U+0300 for NFC/NFD, U+00A0 for NFKC/NFKD, U+0041 for NFKC_Casefold.
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*/
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inline uint8_t leadByteForCP(UChar32 c) {
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if (c <= 0x7f) {
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return (uint8_t)c;
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} else if (c <= 0x7ff) {
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return (uint8_t)(0xc0+(c>>6));
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} else {
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// Should not occur because ccc(U+0300)!=0.
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return 0xe0;
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}
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}
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/**
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* Returns the code point from one single well-formed UTF-8 byte sequence
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* between cpStart and cpLimit.
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*
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* Trie UTF-8 macros do not assemble whole code points (for efficiency).
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* When we do need the code point, we call this function.
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* We should not need it for normalization-inert data (norm16==0).
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* Illegal sequences yield the error value norm16==0 just like real normalization-inert code points.
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*/
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UChar32 codePointFromValidUTF8(const uint8_t *cpStart, const uint8_t *cpLimit) {
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// Similar to U8_NEXT_UNSAFE(s, i, c).
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U_ASSERT(cpStart < cpLimit);
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uint8_t c = *cpStart;
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switch(cpLimit-cpStart) {
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case 1:
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return c;
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case 2:
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return ((c&0x1f)<<6) | (cpStart[1]&0x3f);
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case 3:
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// no need for (c&0xf) because the upper bits are truncated after <<12 in the cast to (char16_t)
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return (char16_t)((c<<12) | ((cpStart[1]&0x3f)<<6) | (cpStart[2]&0x3f));
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case 4:
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return ((c&7)<<18) | ((cpStart[1]&0x3f)<<12) | ((cpStart[2]&0x3f)<<6) | (cpStart[3]&0x3f);
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default:
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UPRV_UNREACHABLE_EXIT; // Should not occur.
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}
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}
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/**
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* Returns the last code point in [start, p[ if it is valid and in U+1000..U+D7FF.
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* Otherwise returns a negative value.
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*/
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UChar32 previousHangulOrJamo(const uint8_t *start, const uint8_t *p) {
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if ((p - start) >= 3) {
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p -= 3;
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uint8_t l = *p;
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uint8_t t1, t2;
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if (0xe1 <= l && l <= 0xed &&
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(t1 = (uint8_t)(p[1] - 0x80)) <= 0x3f &&
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(t2 = (uint8_t)(p[2] - 0x80)) <= 0x3f &&
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(l < 0xed || t1 <= 0x1f)) {
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return ((l & 0xf) << 12) | (t1 << 6) | t2;
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}
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}
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return U_SENTINEL;
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}
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/**
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* Returns the offset from the Jamo T base if [src, limit[ starts with a single Jamo T code point.
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* Otherwise returns a negative value.
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*/
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int32_t getJamoTMinusBase(const uint8_t *src, const uint8_t *limit) {
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// Jamo T: E1 86 A8..E1 87 82
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if ((limit - src) >= 3 && *src == 0xe1) {
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if (src[1] == 0x86) {
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uint8_t t = src[2];
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// The first Jamo T is U+11A8 but JAMO_T_BASE is 11A7.
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// Offset 0 does not correspond to any conjoining Jamo.
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if (0xa8 <= t && t <= 0xbf) {
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return t - 0xa7;
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}
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} else if (src[1] == 0x87) {
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uint8_t t = src[2];
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if ((int8_t)t <= (int8_t)0x82u) {
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return t - (0xa7 - 0x40);
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}
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}
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}
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return -1;
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}
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void
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appendCodePointDelta(const uint8_t *cpStart, const uint8_t *cpLimit, int32_t delta,
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ByteSink &sink, Edits *edits) {
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char buffer[U8_MAX_LENGTH];
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int32_t length;
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int32_t cpLength = (int32_t)(cpLimit - cpStart);
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if (cpLength == 1) {
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// The builder makes ASCII map to ASCII.
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buffer[0] = (uint8_t)(*cpStart + delta);
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length = 1;
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} else {
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int32_t trail = *(cpLimit-1) + delta;
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if (0x80 <= trail && trail <= 0xbf) {
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// The delta only changes the last trail byte.
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--cpLimit;
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length = 0;
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do { buffer[length++] = *cpStart++; } while (cpStart < cpLimit);
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buffer[length++] = (uint8_t)trail;
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} else {
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// Decode the code point, add the delta, re-encode.
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UChar32 c = codePointFromValidUTF8(cpStart, cpLimit) + delta;
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length = 0;
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U8_APPEND_UNSAFE(buffer, length, c);
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}
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}
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if (edits != nullptr) {
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edits->addReplace(cpLength, length);
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}
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sink.Append(buffer, length);
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}
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} // namespace
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// ReorderingBuffer -------------------------------------------------------- ***
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ReorderingBuffer::ReorderingBuffer(const Normalizer2Impl &ni, UnicodeString &dest,
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UErrorCode &errorCode) :
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impl(ni), str(dest),
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start(str.getBuffer(8)), reorderStart(start), limit(start),
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remainingCapacity(str.getCapacity()), lastCC(0) {
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if (start == nullptr && U_SUCCESS(errorCode)) {
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// getBuffer() already did str.setToBogus()
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errorCode = U_MEMORY_ALLOCATION_ERROR;
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}
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}
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UBool ReorderingBuffer::init(int32_t destCapacity, UErrorCode &errorCode) {
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int32_t length=str.length();
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start=str.getBuffer(destCapacity);
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if(start==nullptr) {
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// getBuffer() already did str.setToBogus()
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errorCode=U_MEMORY_ALLOCATION_ERROR;
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return false;
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}
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limit=start+length;
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remainingCapacity=str.getCapacity()-length;
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reorderStart=start;
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if(start==limit) {
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lastCC=0;
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} else {
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setIterator();
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lastCC=previousCC();
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// Set reorderStart after the last code point with cc<=1 if there is one.
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if(lastCC>1) {
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while(previousCC()>1) {}
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}
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reorderStart=codePointLimit;
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}
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return true;
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}
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UBool ReorderingBuffer::equals(const char16_t *otherStart, const char16_t *otherLimit) const {
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int32_t length=(int32_t)(limit-start);
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return
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length==(int32_t)(otherLimit-otherStart) &&
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0==u_memcmp(start, otherStart, length);
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}
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UBool ReorderingBuffer::equals(const uint8_t *otherStart, const uint8_t *otherLimit) const {
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U_ASSERT((otherLimit - otherStart) <= INT32_MAX); // ensured by caller
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int32_t length = (int32_t)(limit - start);
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int32_t otherLength = (int32_t)(otherLimit - otherStart);
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// For equal strings, UTF-8 is at least as long as UTF-16, and at most three times as long.
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if (otherLength < length || (otherLength / 3) > length) {
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return false;
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}
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// Compare valid strings from between normalization boundaries.
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// (Invalid sequences are normalization-inert.)
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for (int32_t i = 0, j = 0;;) {
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if (i >= length) {
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return j >= otherLength;
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} else if (j >= otherLength) {
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return false;
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}
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// Not at the end of either string yet.
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UChar32 c, other;
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U16_NEXT_UNSAFE(start, i, c);
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U8_NEXT_UNSAFE(otherStart, j, other);
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if (c != other) {
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return false;
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}
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}
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}
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UBool ReorderingBuffer::appendSupplementary(UChar32 c, uint8_t cc, UErrorCode &errorCode) {
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if(remainingCapacity<2 && !resize(2, errorCode)) {
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return false;
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}
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if(lastCC<=cc || cc==0) {
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limit[0]=U16_LEAD(c);
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limit[1]=U16_TRAIL(c);
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limit+=2;
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lastCC=cc;
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if(cc<=1) {
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reorderStart=limit;
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}
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} else {
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insert(c, cc);
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}
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remainingCapacity-=2;
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return true;
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}
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UBool ReorderingBuffer::append(const char16_t *s, int32_t length, UBool isNFD,
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uint8_t leadCC, uint8_t trailCC,
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UErrorCode &errorCode) {
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if(length==0) {
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return true;
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}
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if(remainingCapacity<length && !resize(length, errorCode)) {
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return false;
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}
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remainingCapacity-=length;
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if(lastCC<=leadCC || leadCC==0) {
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if(trailCC<=1) {
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reorderStart=limit+length;
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} else if(leadCC<=1) {
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reorderStart=limit+1; // Ok if not a code point boundary.
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}
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const char16_t *sLimit=s+length;
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do { *limit++=*s++; } while(s!=sLimit);
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lastCC=trailCC;
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} else {
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int32_t i=0;
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UChar32 c;
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U16_NEXT(s, i, length, c);
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insert(c, leadCC); // insert first code point
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while(i<length) {
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U16_NEXT(s, i, length, c);
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if(i<length) {
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if (isNFD) {
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leadCC = Normalizer2Impl::getCCFromYesOrMaybe(impl.getRawNorm16(c));
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} else {
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leadCC = impl.getCC(impl.getNorm16(c));
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}
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} else {
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leadCC=trailCC;
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}
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append(c, leadCC, errorCode);
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}
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}
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return true;
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}
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UBool ReorderingBuffer::appendZeroCC(UChar32 c, UErrorCode &errorCode) {
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int32_t cpLength=U16_LENGTH(c);
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if(remainingCapacity<cpLength && !resize(cpLength, errorCode)) {
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return false;
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}
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remainingCapacity-=cpLength;
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if(cpLength==1) {
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*limit++=(char16_t)c;
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} else {
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limit[0]=U16_LEAD(c);
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limit[1]=U16_TRAIL(c);
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limit+=2;
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}
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lastCC=0;
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reorderStart=limit;
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return true;
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}
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UBool ReorderingBuffer::appendZeroCC(const char16_t *s, const char16_t *sLimit, UErrorCode &errorCode) {
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if(s==sLimit) {
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return true;
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}
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int32_t length=(int32_t)(sLimit-s);
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if(remainingCapacity<length && !resize(length, errorCode)) {
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return false;
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}
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u_memcpy(limit, s, length);
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limit+=length;
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remainingCapacity-=length;
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lastCC=0;
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reorderStart=limit;
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return true;
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}
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void ReorderingBuffer::remove() {
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reorderStart=limit=start;
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remainingCapacity=str.getCapacity();
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lastCC=0;
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}
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void ReorderingBuffer::removeSuffix(int32_t suffixLength) {
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if(suffixLength<(limit-start)) {
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limit-=suffixLength;
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remainingCapacity+=suffixLength;
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} else {
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limit=start;
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remainingCapacity=str.getCapacity();
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}
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lastCC=0;
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reorderStart=limit;
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}
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UBool ReorderingBuffer::resize(int32_t appendLength, UErrorCode &errorCode) {
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int32_t reorderStartIndex=(int32_t)(reorderStart-start);
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int32_t length=(int32_t)(limit-start);
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str.releaseBuffer(length);
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int32_t newCapacity=length+appendLength;
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int32_t doubleCapacity=2*str.getCapacity();
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if(newCapacity<doubleCapacity) {
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newCapacity=doubleCapacity;
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}
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if(newCapacity<256) {
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newCapacity=256;
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}
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start=str.getBuffer(newCapacity);
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if(start==nullptr) {
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// getBuffer() already did str.setToBogus()
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errorCode=U_MEMORY_ALLOCATION_ERROR;
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return false;
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}
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reorderStart=start+reorderStartIndex;
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limit=start+length;
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remainingCapacity=str.getCapacity()-length;
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return true;
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}
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void ReorderingBuffer::skipPrevious() {
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codePointLimit=codePointStart;
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char16_t c=*--codePointStart;
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if(U16_IS_TRAIL(c) && start<codePointStart && U16_IS_LEAD(*(codePointStart-1))) {
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--codePointStart;
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}
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}
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uint8_t ReorderingBuffer::previousCC() {
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codePointLimit=codePointStart;
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if(reorderStart>=codePointStart) {
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return 0;
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}
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UChar32 c=*--codePointStart;
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char16_t c2;
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if(U16_IS_TRAIL(c) && start<codePointStart && U16_IS_LEAD(c2=*(codePointStart-1))) {
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--codePointStart;
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c=U16_GET_SUPPLEMENTARY(c2, c);
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}
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return impl.getCCFromYesOrMaybeCP(c);
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}
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// Inserts c somewhere before the last character.
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// Requires 0<cc<lastCC which implies reorderStart<limit.
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void ReorderingBuffer::insert(UChar32 c, uint8_t cc) {
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for(setIterator(), skipPrevious(); previousCC()>cc;) {}
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// insert c at codePointLimit, after the character with prevCC<=cc
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char16_t *q=limit;
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char16_t *r=limit+=U16_LENGTH(c);
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do {
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*--r=*--q;
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} while(codePointLimit!=q);
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writeCodePoint(q, c);
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if(cc<=1) {
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reorderStart=r;
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}
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}
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// Normalizer2Impl --------------------------------------------------------- ***
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struct CanonIterData : public UMemory {
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CanonIterData(UErrorCode &errorCode);
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~CanonIterData();
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void addToStartSet(UChar32 origin, UChar32 decompLead, UErrorCode &errorCode);
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UMutableCPTrie *mutableTrie;
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UCPTrie *trie;
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UVector canonStartSets; // contains UnicodeSet *
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};
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Normalizer2Impl::~Normalizer2Impl() {
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delete fCanonIterData;
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}
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void
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Normalizer2Impl::init(const int32_t *inIndexes, const UCPTrie *inTrie,
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const uint16_t *inExtraData, const uint8_t *inSmallFCD) {
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minDecompNoCP = static_cast<char16_t>(inIndexes[IX_MIN_DECOMP_NO_CP]);
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minCompNoMaybeCP = static_cast<char16_t>(inIndexes[IX_MIN_COMP_NO_MAYBE_CP]);
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minLcccCP = static_cast<char16_t>(inIndexes[IX_MIN_LCCC_CP]);
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minYesNo = static_cast<uint16_t>(inIndexes[IX_MIN_YES_NO]);
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minYesNoMappingsOnly = static_cast<uint16_t>(inIndexes[IX_MIN_YES_NO_MAPPINGS_ONLY]);
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minNoNo = static_cast<uint16_t>(inIndexes[IX_MIN_NO_NO]);
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minNoNoCompBoundaryBefore = static_cast<uint16_t>(inIndexes[IX_MIN_NO_NO_COMP_BOUNDARY_BEFORE]);
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minNoNoCompNoMaybeCC = static_cast<uint16_t>(inIndexes[IX_MIN_NO_NO_COMP_NO_MAYBE_CC]);
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minNoNoEmpty = static_cast<uint16_t>(inIndexes[IX_MIN_NO_NO_EMPTY]);
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limitNoNo = static_cast<uint16_t>(inIndexes[IX_LIMIT_NO_NO]);
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minMaybeYes = static_cast<uint16_t>(inIndexes[IX_MIN_MAYBE_YES]);
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U_ASSERT((minMaybeYes & 7) == 0); // 8-aligned for noNoDelta bit fields
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centerNoNoDelta = (minMaybeYes >> DELTA_SHIFT) - MAX_DELTA - 1;
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normTrie=inTrie;
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maybeYesCompositions=inExtraData;
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extraData=maybeYesCompositions+((MIN_NORMAL_MAYBE_YES-minMaybeYes)>>OFFSET_SHIFT);
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smallFCD=inSmallFCD;
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}
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U_CDECL_BEGIN
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static uint32_t U_CALLCONV
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segmentStarterMapper(const void * /*context*/, uint32_t value) {
|
|
return value&CANON_NOT_SEGMENT_STARTER;
|
|
}
|
|
|
|
U_CDECL_END
|
|
|
|
void
|
|
Normalizer2Impl::addLcccChars(UnicodeSet &set) const {
|
|
UChar32 start = 0, end;
|
|
uint32_t norm16;
|
|
while ((end = ucptrie_getRange(normTrie, start, UCPMAP_RANGE_FIXED_LEAD_SURROGATES, INERT,
|
|
nullptr, nullptr, &norm16)) >= 0) {
|
|
if (norm16 > Normalizer2Impl::MIN_NORMAL_MAYBE_YES &&
|
|
norm16 != Normalizer2Impl::JAMO_VT) {
|
|
set.add(start, end);
|
|
} else if (minNoNoCompNoMaybeCC <= norm16 && norm16 < limitNoNo) {
|
|
uint16_t fcd16 = getFCD16(start);
|
|
if (fcd16 > 0xff) { set.add(start, end); }
|
|
}
|
|
start = end + 1;
|
|
}
|
|
}
|
|
|
|
void
|
|
Normalizer2Impl::addPropertyStarts(const USetAdder *sa, UErrorCode & /*errorCode*/) const {
|
|
// Add the start code point of each same-value range of the trie.
|
|
UChar32 start = 0, end;
|
|
uint32_t value;
|
|
while ((end = ucptrie_getRange(normTrie, start, UCPMAP_RANGE_FIXED_LEAD_SURROGATES, INERT,
|
|
nullptr, nullptr, &value)) >= 0) {
|
|
sa->add(sa->set, start);
|
|
if (start != end && isAlgorithmicNoNo((uint16_t)value) &&
|
|
(value & Normalizer2Impl::DELTA_TCCC_MASK) > Normalizer2Impl::DELTA_TCCC_1) {
|
|
// Range of code points with same-norm16-value algorithmic decompositions.
|
|
// They might have different non-zero FCD16 values.
|
|
uint16_t prevFCD16 = getFCD16(start);
|
|
while (++start <= end) {
|
|
uint16_t fcd16 = getFCD16(start);
|
|
if (fcd16 != prevFCD16) {
|
|
sa->add(sa->set, start);
|
|
prevFCD16 = fcd16;
|
|
}
|
|
}
|
|
}
|
|
start = end + 1;
|
|
}
|
|
|
|
/* add Hangul LV syllables and LV+1 because of skippables */
|
|
for(char16_t c=Hangul::HANGUL_BASE; c<Hangul::HANGUL_LIMIT; c+=Hangul::JAMO_T_COUNT) {
|
|
sa->add(sa->set, c);
|
|
sa->add(sa->set, c+1);
|
|
}
|
|
sa->add(sa->set, Hangul::HANGUL_LIMIT); /* add Hangul+1 to continue with other properties */
|
|
}
|
|
|
|
void
|
|
Normalizer2Impl::addCanonIterPropertyStarts(const USetAdder *sa, UErrorCode &errorCode) const {
|
|
// Add the start code point of each same-value range of the canonical iterator data trie.
|
|
if (!ensureCanonIterData(errorCode)) { return; }
|
|
// Currently only used for the SEGMENT_STARTER property.
|
|
UChar32 start = 0, end;
|
|
uint32_t value;
|
|
while ((end = ucptrie_getRange(fCanonIterData->trie, start, UCPMAP_RANGE_NORMAL, 0,
|
|
segmentStarterMapper, nullptr, &value)) >= 0) {
|
|
sa->add(sa->set, start);
|
|
start = end + 1;
|
|
}
|
|
}
|
|
|
|
const char16_t *
|
|
Normalizer2Impl::copyLowPrefixFromNulTerminated(const char16_t *src,
|
|
UChar32 minNeedDataCP,
|
|
ReorderingBuffer *buffer,
|
|
UErrorCode &errorCode) const {
|
|
// Make some effort to support NUL-terminated strings reasonably.
|
|
// Take the part of the fast quick check loop that does not look up
|
|
// data and check the first part of the string.
|
|
// After this prefix, determine the string length to simplify the rest
|
|
// of the code.
|
|
const char16_t *prevSrc=src;
|
|
char16_t c;
|
|
while((c=*src++)<minNeedDataCP && c!=0) {}
|
|
// Back out the last character for full processing.
|
|
// Copy this prefix.
|
|
if(--src!=prevSrc) {
|
|
if(buffer!=nullptr) {
|
|
buffer->appendZeroCC(prevSrc, src, errorCode);
|
|
}
|
|
}
|
|
return src;
|
|
}
|
|
|
|
UnicodeString &
|
|
Normalizer2Impl::decompose(const UnicodeString &src, UnicodeString &dest,
|
|
UErrorCode &errorCode) const {
|
|
if(U_FAILURE(errorCode)) {
|
|
dest.setToBogus();
|
|
return dest;
|
|
}
|
|
const char16_t *sArray=src.getBuffer();
|
|
if(&dest==&src || sArray==nullptr) {
|
|
errorCode=U_ILLEGAL_ARGUMENT_ERROR;
|
|
dest.setToBogus();
|
|
return dest;
|
|
}
|
|
decompose(sArray, sArray+src.length(), dest, src.length(), errorCode);
|
|
return dest;
|
|
}
|
|
|
|
void
|
|
Normalizer2Impl::decompose(const char16_t *src, const char16_t *limit,
|
|
UnicodeString &dest,
|
|
int32_t destLengthEstimate,
|
|
UErrorCode &errorCode) const {
|
|
if(destLengthEstimate<0 && limit!=nullptr) {
|
|
destLengthEstimate=(int32_t)(limit-src);
|
|
}
|
|
dest.remove();
|
|
ReorderingBuffer buffer(*this, dest);
|
|
if(buffer.init(destLengthEstimate, errorCode)) {
|
|
decompose(src, limit, &buffer, errorCode);
|
|
}
|
|
}
|
|
|
|
// Dual functionality:
|
|
// buffer!=nullptr: normalize
|
|
// buffer==nullptr: isNormalized/spanQuickCheckYes
|
|
const char16_t *
|
|
Normalizer2Impl::decompose(const char16_t *src, const char16_t *limit,
|
|
ReorderingBuffer *buffer,
|
|
UErrorCode &errorCode) const {
|
|
UChar32 minNoCP=minDecompNoCP;
|
|
if(limit==nullptr) {
|
|
src=copyLowPrefixFromNulTerminated(src, minNoCP, buffer, errorCode);
|
|
if(U_FAILURE(errorCode)) {
|
|
return src;
|
|
}
|
|
limit=u_strchr(src, 0);
|
|
}
|
|
|
|
const char16_t *prevSrc;
|
|
UChar32 c=0;
|
|
uint16_t norm16=0;
|
|
|
|
// only for quick check
|
|
const char16_t *prevBoundary=src;
|
|
uint8_t prevCC=0;
|
|
|
|
for(;;) {
|
|
// count code units below the minimum or with irrelevant data for the quick check
|
|
for(prevSrc=src; src!=limit;) {
|
|
if( (c=*src)<minNoCP ||
|
|
isMostDecompYesAndZeroCC(norm16=UCPTRIE_FAST_BMP_GET(normTrie, UCPTRIE_16, c))
|
|
) {
|
|
++src;
|
|
} else if(!U16_IS_LEAD(c)) {
|
|
break;
|
|
} else {
|
|
char16_t c2;
|
|
if((src+1)!=limit && U16_IS_TRAIL(c2=src[1])) {
|
|
c=U16_GET_SUPPLEMENTARY(c, c2);
|
|
norm16=UCPTRIE_FAST_SUPP_GET(normTrie, UCPTRIE_16, c);
|
|
if(isMostDecompYesAndZeroCC(norm16)) {
|
|
src+=2;
|
|
} else {
|
|
break;
|
|
}
|
|
} else {
|
|
++src; // unpaired lead surrogate: inert
|
|
}
|
|
}
|
|
}
|
|
// copy these code units all at once
|
|
if(src!=prevSrc) {
|
|
if(buffer!=nullptr) {
|
|
if(!buffer->appendZeroCC(prevSrc, src, errorCode)) {
|
|
break;
|
|
}
|
|
} else {
|
|
prevCC=0;
|
|
prevBoundary=src;
|
|
}
|
|
}
|
|
if(src==limit) {
|
|
break;
|
|
}
|
|
|
|
// Check one above-minimum, relevant code point.
|
|
src+=U16_LENGTH(c);
|
|
if(buffer!=nullptr) {
|
|
if(!decompose(c, norm16, *buffer, errorCode)) {
|
|
break;
|
|
}
|
|
} else {
|
|
if(isDecompYes(norm16)) {
|
|
uint8_t cc=getCCFromYesOrMaybe(norm16);
|
|
if(prevCC<=cc || cc==0) {
|
|
prevCC=cc;
|
|
if(cc<=1) {
|
|
prevBoundary=src;
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
return prevBoundary; // "no" or cc out of order
|
|
}
|
|
}
|
|
return src;
|
|
}
|
|
|
|
// Decompose a short piece of text which is likely to contain characters that
|
|
// fail the quick check loop and/or where the quick check loop's overhead
|
|
// is unlikely to be amortized.
|
|
// Called by the compose() and makeFCD() implementations.
|
|
const char16_t *
|
|
Normalizer2Impl::decomposeShort(const char16_t *src, const char16_t *limit,
|
|
UBool stopAtCompBoundary, UBool onlyContiguous,
|
|
ReorderingBuffer &buffer, UErrorCode &errorCode) const {
|
|
if (U_FAILURE(errorCode)) {
|
|
return nullptr;
|
|
}
|
|
while(src<limit) {
|
|
if (stopAtCompBoundary && *src < minCompNoMaybeCP) {
|
|
return src;
|
|
}
|
|
const char16_t *prevSrc = src;
|
|
UChar32 c;
|
|
uint16_t norm16;
|
|
UCPTRIE_FAST_U16_NEXT(normTrie, UCPTRIE_16, src, limit, c, norm16);
|
|
if (stopAtCompBoundary && norm16HasCompBoundaryBefore(norm16)) {
|
|
return prevSrc;
|
|
}
|
|
if(!decompose(c, norm16, buffer, errorCode)) {
|
|
return nullptr;
|
|
}
|
|
if (stopAtCompBoundary && norm16HasCompBoundaryAfter(norm16, onlyContiguous)) {
|
|
return src;
|
|
}
|
|
}
|
|
return src;
|
|
}
|
|
|
|
UBool Normalizer2Impl::decompose(UChar32 c, uint16_t norm16,
|
|
ReorderingBuffer &buffer,
|
|
UErrorCode &errorCode) const {
|
|
// get the decomposition and the lead and trail cc's
|
|
if (norm16 >= limitNoNo) {
|
|
if (isMaybeOrNonZeroCC(norm16)) {
|
|
return buffer.append(c, getCCFromYesOrMaybe(norm16), errorCode);
|
|
}
|
|
// Maps to an isCompYesAndZeroCC.
|
|
c=mapAlgorithmic(c, norm16);
|
|
norm16=getRawNorm16(c);
|
|
}
|
|
if (norm16 < minYesNo) {
|
|
// c does not decompose
|
|
return buffer.append(c, 0, errorCode);
|
|
} else if(isHangulLV(norm16) || isHangulLVT(norm16)) {
|
|
// Hangul syllable: decompose algorithmically
|
|
char16_t jamos[3];
|
|
return buffer.appendZeroCC(jamos, jamos+Hangul::decompose(c, jamos), errorCode);
|
|
}
|
|
// c decomposes, get everything from the variable-length extra data
|
|
const uint16_t *mapping=getMapping(norm16);
|
|
uint16_t firstUnit=*mapping;
|
|
int32_t length=firstUnit&MAPPING_LENGTH_MASK;
|
|
uint8_t leadCC, trailCC;
|
|
trailCC=(uint8_t)(firstUnit>>8);
|
|
if(firstUnit&MAPPING_HAS_CCC_LCCC_WORD) {
|
|
leadCC=(uint8_t)(*(mapping-1)>>8);
|
|
} else {
|
|
leadCC=0;
|
|
}
|
|
return buffer.append((const char16_t *)mapping+1, length, true, leadCC, trailCC, errorCode);
|
|
}
|
|
|
|
// Dual functionality:
|
|
// sink != nullptr: normalize
|
|
// sink == nullptr: isNormalized/spanQuickCheckYes
|
|
const uint8_t *
|
|
Normalizer2Impl::decomposeUTF8(uint32_t options,
|
|
const uint8_t *src, const uint8_t *limit,
|
|
ByteSink *sink, Edits *edits, UErrorCode &errorCode) const {
|
|
U_ASSERT(limit != nullptr);
|
|
UnicodeString s16;
|
|
uint8_t minNoLead = leadByteForCP(minDecompNoCP);
|
|
|
|
const uint8_t *prevBoundary = src;
|
|
// only for quick check
|
|
uint8_t prevCC = 0;
|
|
|
|
for (;;) {
|
|
// Fast path: Scan over a sequence of characters below the minimum "no" code point,
|
|
// or with (decompYes && ccc==0) properties.
|
|
const uint8_t *fastStart = src;
|
|
const uint8_t *prevSrc;
|
|
uint16_t norm16 = 0;
|
|
|
|
for (;;) {
|
|
if (src == limit) {
|
|
if (prevBoundary != limit && sink != nullptr) {
|
|
ByteSinkUtil::appendUnchanged(prevBoundary, limit,
|
|
*sink, options, edits, errorCode);
|
|
}
|
|
return src;
|
|
}
|
|
if (*src < minNoLead) {
|
|
++src;
|
|
} else {
|
|
prevSrc = src;
|
|
UCPTRIE_FAST_U8_NEXT(normTrie, UCPTRIE_16, src, limit, norm16);
|
|
if (!isMostDecompYesAndZeroCC(norm16)) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// isMostDecompYesAndZeroCC(norm16) is false, that is, norm16>=minYesNo,
|
|
// and the current character at [prevSrc..src[ is not a common case with cc=0
|
|
// (MIN_NORMAL_MAYBE_YES or JAMO_VT).
|
|
// It could still be a maybeYes with cc=0.
|
|
if (prevSrc != fastStart) {
|
|
// The fast path looped over yes/0 characters before the current one.
|
|
if (sink != nullptr &&
|
|
!ByteSinkUtil::appendUnchanged(prevBoundary, prevSrc,
|
|
*sink, options, edits, errorCode)) {
|
|
break;
|
|
}
|
|
prevBoundary = prevSrc;
|
|
prevCC = 0;
|
|
}
|
|
|
|
// Medium-fast path: Quick check.
|
|
if (isMaybeOrNonZeroCC(norm16)) {
|
|
// Does not decompose.
|
|
uint8_t cc = getCCFromYesOrMaybe(norm16);
|
|
if (prevCC <= cc || cc == 0) {
|
|
prevCC = cc;
|
|
if (cc <= 1) {
|
|
if (sink != nullptr &&
|
|
!ByteSinkUtil::appendUnchanged(prevBoundary, src,
|
|
*sink, options, edits, errorCode)) {
|
|
break;
|
|
}
|
|
prevBoundary = src;
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
if (sink == nullptr) {
|
|
return prevBoundary; // quick check: "no" or cc out of order
|
|
}
|
|
|
|
// Slow path
|
|
// Decompose up to and including the current character.
|
|
if (prevBoundary != prevSrc && norm16HasDecompBoundaryBefore(norm16)) {
|
|
if (!ByteSinkUtil::appendUnchanged(prevBoundary, prevSrc,
|
|
*sink, options, edits, errorCode)) {
|
|
break;
|
|
}
|
|
prevBoundary = prevSrc;
|
|
}
|
|
ReorderingBuffer buffer(*this, s16, errorCode);
|
|
if (U_FAILURE(errorCode)) {
|
|
break;
|
|
}
|
|
decomposeShort(prevBoundary, src, STOP_AT_LIMIT, false /* onlyContiguous */,
|
|
buffer, errorCode);
|
|
// Decompose until the next boundary.
|
|
if (buffer.getLastCC() > 1) {
|
|
src = decomposeShort(src, limit, STOP_AT_DECOMP_BOUNDARY, false /* onlyContiguous */,
|
|
buffer, errorCode);
|
|
}
|
|
if (U_FAILURE(errorCode)) {
|
|
break;
|
|
}
|
|
if ((src - prevSrc) > INT32_MAX) { // guard before buffer.equals()
|
|
errorCode = U_INDEX_OUTOFBOUNDS_ERROR;
|
|
break;
|
|
}
|
|
// We already know there was a change if the original character decomposed;
|
|
// otherwise compare.
|
|
if (isMaybeOrNonZeroCC(norm16) && buffer.equals(prevBoundary, src)) {
|
|
if (!ByteSinkUtil::appendUnchanged(prevBoundary, src,
|
|
*sink, options, edits, errorCode)) {
|
|
break;
|
|
}
|
|
} else {
|
|
if (!ByteSinkUtil::appendChange(prevBoundary, src, buffer.getStart(), buffer.length(),
|
|
*sink, edits, errorCode)) {
|
|
break;
|
|
}
|
|
}
|
|
prevBoundary = src;
|
|
prevCC = 0;
|
|
}
|
|
return src;
|
|
}
|
|
|
|
const uint8_t *
|
|
Normalizer2Impl::decomposeShort(const uint8_t *src, const uint8_t *limit,
|
|
StopAt stopAt, UBool onlyContiguous,
|
|
ReorderingBuffer &buffer, UErrorCode &errorCode) const {
|
|
if (U_FAILURE(errorCode)) {
|
|
return nullptr;
|
|
}
|
|
while (src < limit) {
|
|
const uint8_t *prevSrc = src;
|
|
uint16_t norm16;
|
|
UCPTRIE_FAST_U8_NEXT(normTrie, UCPTRIE_16, src, limit, norm16);
|
|
// Get the decomposition and the lead and trail cc's.
|
|
UChar32 c = U_SENTINEL;
|
|
if (norm16 >= limitNoNo) {
|
|
if (isMaybeOrNonZeroCC(norm16)) {
|
|
// No comp boundaries around this character.
|
|
uint8_t cc = getCCFromYesOrMaybe(norm16);
|
|
if (cc == 0 && stopAt == STOP_AT_DECOMP_BOUNDARY) {
|
|
return prevSrc;
|
|
}
|
|
c = codePointFromValidUTF8(prevSrc, src);
|
|
if (!buffer.append(c, cc, errorCode)) {
|
|
return nullptr;
|
|
}
|
|
if (stopAt == STOP_AT_DECOMP_BOUNDARY && buffer.getLastCC() <= 1) {
|
|
return src;
|
|
}
|
|
continue;
|
|
}
|
|
// Maps to an isCompYesAndZeroCC.
|
|
if (stopAt != STOP_AT_LIMIT) {
|
|
return prevSrc;
|
|
}
|
|
c = codePointFromValidUTF8(prevSrc, src);
|
|
c = mapAlgorithmic(c, norm16);
|
|
norm16 = getRawNorm16(c);
|
|
} else if (stopAt != STOP_AT_LIMIT && norm16 < minNoNoCompNoMaybeCC) {
|
|
return prevSrc;
|
|
}
|
|
// norm16!=INERT guarantees that [prevSrc, src[ is valid UTF-8.
|
|
// We do not see invalid UTF-8 here because
|
|
// its norm16==INERT is normalization-inert,
|
|
// so it gets copied unchanged in the fast path,
|
|
// and we stop the slow path where invalid UTF-8 begins.
|
|
// c >= 0 is the result of an algorithmic mapping.
|
|
U_ASSERT(c >= 0 || norm16 != INERT);
|
|
if (norm16 < minYesNo) {
|
|
if (c < 0) {
|
|
c = codePointFromValidUTF8(prevSrc, src);
|
|
}
|
|
// does not decompose
|
|
if (!buffer.append(c, 0, errorCode)) {
|
|
return nullptr;
|
|
}
|
|
} else if (isHangulLV(norm16) || isHangulLVT(norm16)) {
|
|
// Hangul syllable: decompose algorithmically
|
|
if (c < 0) {
|
|
c = codePointFromValidUTF8(prevSrc, src);
|
|
}
|
|
char16_t jamos[3];
|
|
if (!buffer.appendZeroCC(jamos, jamos+Hangul::decompose(c, jamos), errorCode)) {
|
|
return nullptr;
|
|
}
|
|
} else {
|
|
// The character decomposes, get everything from the variable-length extra data.
|
|
const uint16_t *mapping = getMapping(norm16);
|
|
uint16_t firstUnit = *mapping;
|
|
int32_t length = firstUnit & MAPPING_LENGTH_MASK;
|
|
uint8_t trailCC = (uint8_t)(firstUnit >> 8);
|
|
uint8_t leadCC;
|
|
if (firstUnit & MAPPING_HAS_CCC_LCCC_WORD) {
|
|
leadCC = (uint8_t)(*(mapping-1) >> 8);
|
|
} else {
|
|
leadCC = 0;
|
|
}
|
|
if (leadCC == 0 && stopAt == STOP_AT_DECOMP_BOUNDARY) {
|
|
return prevSrc;
|
|
}
|
|
if (!buffer.append((const char16_t *)mapping+1, length, true, leadCC, trailCC, errorCode)) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
if ((stopAt == STOP_AT_COMP_BOUNDARY && norm16HasCompBoundaryAfter(norm16, onlyContiguous)) ||
|
|
(stopAt == STOP_AT_DECOMP_BOUNDARY && buffer.getLastCC() <= 1)) {
|
|
return src;
|
|
}
|
|
}
|
|
return src;
|
|
}
|
|
|
|
const char16_t *
|
|
Normalizer2Impl::getDecomposition(UChar32 c, char16_t buffer[4], int32_t &length) const {
|
|
uint16_t norm16;
|
|
if(c<minDecompNoCP || isMaybeOrNonZeroCC(norm16=getNorm16(c))) {
|
|
// c does not decompose
|
|
return nullptr;
|
|
}
|
|
const char16_t *decomp = nullptr;
|
|
if(isDecompNoAlgorithmic(norm16)) {
|
|
// Maps to an isCompYesAndZeroCC.
|
|
c=mapAlgorithmic(c, norm16);
|
|
decomp=buffer;
|
|
length=0;
|
|
U16_APPEND_UNSAFE(buffer, length, c);
|
|
// The mapping might decompose further.
|
|
norm16 = getRawNorm16(c);
|
|
}
|
|
if (norm16 < minYesNo) {
|
|
return decomp;
|
|
} else if(isHangulLV(norm16) || isHangulLVT(norm16)) {
|
|
// Hangul syllable: decompose algorithmically
|
|
length=Hangul::decompose(c, buffer);
|
|
return buffer;
|
|
}
|
|
// c decomposes, get everything from the variable-length extra data
|
|
const uint16_t *mapping=getMapping(norm16);
|
|
length=*mapping&MAPPING_LENGTH_MASK;
|
|
return (const char16_t *)mapping+1;
|
|
}
|
|
|
|
// The capacity of the buffer must be 30=MAPPING_LENGTH_MASK-1
|
|
// so that a raw mapping fits that consists of one unit ("rm0")
|
|
// plus all but the first two code units of the normal mapping.
|
|
// The maximum length of a normal mapping is 31=MAPPING_LENGTH_MASK.
|
|
const char16_t *
|
|
Normalizer2Impl::getRawDecomposition(UChar32 c, char16_t buffer[30], int32_t &length) const {
|
|
uint16_t norm16;
|
|
if(c<minDecompNoCP || isDecompYes(norm16=getNorm16(c))) {
|
|
// c does not decompose
|
|
return nullptr;
|
|
} else if(isHangulLV(norm16) || isHangulLVT(norm16)) {
|
|
// Hangul syllable: decompose algorithmically
|
|
Hangul::getRawDecomposition(c, buffer);
|
|
length=2;
|
|
return buffer;
|
|
} else if(isDecompNoAlgorithmic(norm16)) {
|
|
c=mapAlgorithmic(c, norm16);
|
|
length=0;
|
|
U16_APPEND_UNSAFE(buffer, length, c);
|
|
return buffer;
|
|
}
|
|
// c decomposes, get everything from the variable-length extra data
|
|
const uint16_t *mapping=getMapping(norm16);
|
|
uint16_t firstUnit=*mapping;
|
|
int32_t mLength=firstUnit&MAPPING_LENGTH_MASK; // length of normal mapping
|
|
if(firstUnit&MAPPING_HAS_RAW_MAPPING) {
|
|
// Read the raw mapping from before the firstUnit and before the optional ccc/lccc word.
|
|
// Bit 7=MAPPING_HAS_CCC_LCCC_WORD
|
|
const uint16_t *rawMapping=mapping-((firstUnit>>7)&1)-1;
|
|
uint16_t rm0=*rawMapping;
|
|
if(rm0<=MAPPING_LENGTH_MASK) {
|
|
length=rm0;
|
|
return (const char16_t *)rawMapping-rm0;
|
|
} else {
|
|
// Copy the normal mapping and replace its first two code units with rm0.
|
|
buffer[0]=(char16_t)rm0;
|
|
u_memcpy(buffer+1, (const char16_t *)mapping+1+2, mLength-2);
|
|
length=mLength-1;
|
|
return buffer;
|
|
}
|
|
} else {
|
|
length=mLength;
|
|
return (const char16_t *)mapping+1;
|
|
}
|
|
}
|
|
|
|
void Normalizer2Impl::decomposeAndAppend(const char16_t *src, const char16_t *limit,
|
|
UBool doDecompose,
|
|
UnicodeString &safeMiddle,
|
|
ReorderingBuffer &buffer,
|
|
UErrorCode &errorCode) const {
|
|
buffer.copyReorderableSuffixTo(safeMiddle);
|
|
if(doDecompose) {
|
|
decompose(src, limit, &buffer, errorCode);
|
|
return;
|
|
}
|
|
// Just merge the strings at the boundary.
|
|
bool isFirst = true;
|
|
uint8_t firstCC = 0, prevCC = 0, cc;
|
|
const char16_t *p = src;
|
|
while (p != limit) {
|
|
const char16_t *codePointStart = p;
|
|
UChar32 c;
|
|
uint16_t norm16;
|
|
UCPTRIE_FAST_U16_NEXT(normTrie, UCPTRIE_16, p, limit, c, norm16);
|
|
if ((cc = getCC(norm16)) == 0) {
|
|
p = codePointStart;
|
|
break;
|
|
}
|
|
if (isFirst) {
|
|
firstCC = cc;
|
|
isFirst = false;
|
|
}
|
|
prevCC = cc;
|
|
}
|
|
if(limit==nullptr) { // appendZeroCC() needs limit!=nullptr
|
|
limit=u_strchr(p, 0);
|
|
}
|
|
|
|
if (buffer.append(src, (int32_t)(p - src), false, firstCC, prevCC, errorCode)) {
|
|
buffer.appendZeroCC(p, limit, errorCode);
|
|
}
|
|
}
|
|
|
|
UBool Normalizer2Impl::hasDecompBoundaryBefore(UChar32 c) const {
|
|
return c < minLcccCP || (c <= 0xffff && !singleLeadMightHaveNonZeroFCD16(c)) ||
|
|
norm16HasDecompBoundaryBefore(getNorm16(c));
|
|
}
|
|
|
|
UBool Normalizer2Impl::norm16HasDecompBoundaryBefore(uint16_t norm16) const {
|
|
if (norm16 < minNoNoCompNoMaybeCC) {
|
|
return true;
|
|
}
|
|
if (norm16 >= limitNoNo) {
|
|
return norm16 <= MIN_NORMAL_MAYBE_YES || norm16 == JAMO_VT;
|
|
}
|
|
// c decomposes, get everything from the variable-length extra data
|
|
const uint16_t *mapping=getMapping(norm16);
|
|
uint16_t firstUnit=*mapping;
|
|
// true if leadCC==0 (hasFCDBoundaryBefore())
|
|
return (firstUnit&MAPPING_HAS_CCC_LCCC_WORD)==0 || (*(mapping-1)&0xff00)==0;
|
|
}
|
|
|
|
UBool Normalizer2Impl::hasDecompBoundaryAfter(UChar32 c) const {
|
|
if (c < minDecompNoCP) {
|
|
return true;
|
|
}
|
|
if (c <= 0xffff && !singleLeadMightHaveNonZeroFCD16(c)) {
|
|
return true;
|
|
}
|
|
return norm16HasDecompBoundaryAfter(getNorm16(c));
|
|
}
|
|
|
|
UBool Normalizer2Impl::norm16HasDecompBoundaryAfter(uint16_t norm16) const {
|
|
if(norm16 <= minYesNo || isHangulLVT(norm16)) {
|
|
return true;
|
|
}
|
|
if (norm16 >= limitNoNo) {
|
|
if (isMaybeOrNonZeroCC(norm16)) {
|
|
return norm16 <= MIN_NORMAL_MAYBE_YES || norm16 == JAMO_VT;
|
|
}
|
|
// Maps to an isCompYesAndZeroCC.
|
|
return (norm16 & DELTA_TCCC_MASK) <= DELTA_TCCC_1;
|
|
}
|
|
// c decomposes, get everything from the variable-length extra data
|
|
const uint16_t *mapping=getMapping(norm16);
|
|
uint16_t firstUnit=*mapping;
|
|
// decomp after-boundary: same as hasFCDBoundaryAfter(),
|
|
// fcd16<=1 || trailCC==0
|
|
if(firstUnit>0x1ff) {
|
|
return false; // trailCC>1
|
|
}
|
|
if(firstUnit<=0xff) {
|
|
return true; // trailCC==0
|
|
}
|
|
// if(trailCC==1) test leadCC==0, same as checking for before-boundary
|
|
// true if leadCC==0 (hasFCDBoundaryBefore())
|
|
return (firstUnit&MAPPING_HAS_CCC_LCCC_WORD)==0 || (*(mapping-1)&0xff00)==0;
|
|
}
|
|
|
|
/*
|
|
* Finds the recomposition result for
|
|
* a forward-combining "lead" character,
|
|
* specified with a pointer to its compositions list,
|
|
* and a backward-combining "trail" character.
|
|
*
|
|
* If the lead and trail characters combine, then this function returns
|
|
* the following "compositeAndFwd" value:
|
|
* Bits 21..1 composite character
|
|
* Bit 0 set if the composite is a forward-combining starter
|
|
* otherwise it returns -1.
|
|
*
|
|
* The compositions list has (trail, compositeAndFwd) pair entries,
|
|
* encoded as either pairs or triples of 16-bit units.
|
|
* The last entry has the high bit of its first unit set.
|
|
*
|
|
* The list is sorted by ascending trail characters (there are no duplicates).
|
|
* A linear search is used.
|
|
*
|
|
* See normalizer2impl.h for a more detailed description
|
|
* of the compositions list format.
|
|
*/
|
|
int32_t Normalizer2Impl::combine(const uint16_t *list, UChar32 trail) {
|
|
uint16_t key1, firstUnit;
|
|
if(trail<COMP_1_TRAIL_LIMIT) {
|
|
// trail character is 0..33FF
|
|
// result entry may have 2 or 3 units
|
|
key1=(uint16_t)(trail<<1);
|
|
while(key1>(firstUnit=*list)) {
|
|
list+=2+(firstUnit&COMP_1_TRIPLE);
|
|
}
|
|
if(key1==(firstUnit&COMP_1_TRAIL_MASK)) {
|
|
if(firstUnit&COMP_1_TRIPLE) {
|
|
return ((int32_t)list[1]<<16)|list[2];
|
|
} else {
|
|
return list[1];
|
|
}
|
|
}
|
|
} else {
|
|
// trail character is 3400..10FFFF
|
|
// result entry has 3 units
|
|
key1=(uint16_t)(COMP_1_TRAIL_LIMIT+
|
|
(((trail>>COMP_1_TRAIL_SHIFT))&
|
|
~COMP_1_TRIPLE));
|
|
uint16_t key2=(uint16_t)(trail<<COMP_2_TRAIL_SHIFT);
|
|
uint16_t secondUnit;
|
|
for(;;) {
|
|
if(key1>(firstUnit=*list)) {
|
|
list+=2+(firstUnit&COMP_1_TRIPLE);
|
|
} else if(key1==(firstUnit&COMP_1_TRAIL_MASK)) {
|
|
if(key2>(secondUnit=list[1])) {
|
|
if(firstUnit&COMP_1_LAST_TUPLE) {
|
|
break;
|
|
} else {
|
|
list+=3;
|
|
}
|
|
} else if(key2==(secondUnit&COMP_2_TRAIL_MASK)) {
|
|
return ((int32_t)(secondUnit&~COMP_2_TRAIL_MASK)<<16)|list[2];
|
|
} else {
|
|
break;
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* @param list some character's compositions list
|
|
* @param set recursively receives the composites from these compositions
|
|
*/
|
|
void Normalizer2Impl::addComposites(const uint16_t *list, UnicodeSet &set) const {
|
|
uint16_t firstUnit;
|
|
int32_t compositeAndFwd;
|
|
do {
|
|
firstUnit=*list;
|
|
if((firstUnit&COMP_1_TRIPLE)==0) {
|
|
compositeAndFwd=list[1];
|
|
list+=2;
|
|
} else {
|
|
compositeAndFwd=(((int32_t)list[1]&~COMP_2_TRAIL_MASK)<<16)|list[2];
|
|
list+=3;
|
|
}
|
|
UChar32 composite=compositeAndFwd>>1;
|
|
if((compositeAndFwd&1)!=0) {
|
|
addComposites(getCompositionsListForComposite(getRawNorm16(composite)), set);
|
|
}
|
|
set.add(composite);
|
|
} while((firstUnit&COMP_1_LAST_TUPLE)==0);
|
|
}
|
|
|
|
/*
|
|
* Recomposes the buffer text starting at recomposeStartIndex
|
|
* (which is in NFD - decomposed and canonically ordered),
|
|
* and truncates the buffer contents.
|
|
*
|
|
* Note that recomposition never lengthens the text:
|
|
* Any character consists of either one or two code units;
|
|
* a composition may contain at most one more code unit than the original starter,
|
|
* while the combining mark that is removed has at least one code unit.
|
|
*/
|
|
void Normalizer2Impl::recompose(ReorderingBuffer &buffer, int32_t recomposeStartIndex,
|
|
UBool onlyContiguous) const {
|
|
char16_t *p=buffer.getStart()+recomposeStartIndex;
|
|
char16_t *limit=buffer.getLimit();
|
|
if(p==limit) {
|
|
return;
|
|
}
|
|
|
|
char16_t *starter, *pRemove, *q, *r;
|
|
const uint16_t *compositionsList;
|
|
UChar32 c, compositeAndFwd;
|
|
uint16_t norm16;
|
|
uint8_t cc, prevCC;
|
|
UBool starterIsSupplementary;
|
|
|
|
// Some of the following variables are not used until we have a forward-combining starter
|
|
// and are only initialized now to avoid compiler warnings.
|
|
compositionsList=nullptr; // used as indicator for whether we have a forward-combining starter
|
|
starter=nullptr;
|
|
starterIsSupplementary=false;
|
|
prevCC=0;
|
|
|
|
for(;;) {
|
|
UCPTRIE_FAST_U16_NEXT(normTrie, UCPTRIE_16, p, limit, c, norm16);
|
|
cc=getCCFromYesOrMaybe(norm16);
|
|
if( // this character combines backward and
|
|
isMaybe(norm16) &&
|
|
// we have seen a starter that combines forward and
|
|
compositionsList!=nullptr &&
|
|
// the backward-combining character is not blocked
|
|
(prevCC<cc || prevCC==0)
|
|
) {
|
|
if(isJamoVT(norm16)) {
|
|
// c is a Jamo V/T, see if we can compose it with the previous character.
|
|
if(c<Hangul::JAMO_T_BASE) {
|
|
// c is a Jamo Vowel, compose with previous Jamo L and following Jamo T.
|
|
char16_t prev=(char16_t)(*starter-Hangul::JAMO_L_BASE);
|
|
if(prev<Hangul::JAMO_L_COUNT) {
|
|
pRemove=p-1;
|
|
char16_t syllable=(char16_t)
|
|
(Hangul::HANGUL_BASE+
|
|
(prev*Hangul::JAMO_V_COUNT+(c-Hangul::JAMO_V_BASE))*
|
|
Hangul::JAMO_T_COUNT);
|
|
char16_t t;
|
|
if(p!=limit && (t=(char16_t)(*p-Hangul::JAMO_T_BASE))<Hangul::JAMO_T_COUNT) {
|
|
++p;
|
|
syllable+=t; // The next character was a Jamo T.
|
|
}
|
|
*starter=syllable;
|
|
// remove the Jamo V/T
|
|
q=pRemove;
|
|
r=p;
|
|
while(r<limit) {
|
|
*q++=*r++;
|
|
}
|
|
limit=q;
|
|
p=pRemove;
|
|
}
|
|
}
|
|
/*
|
|
* No "else" for Jamo T:
|
|
* Since the input is in NFD, there are no Hangul LV syllables that
|
|
* a Jamo T could combine with.
|
|
* All Jamo Ts are combined above when handling Jamo Vs.
|
|
*/
|
|
if(p==limit) {
|
|
break;
|
|
}
|
|
compositionsList=nullptr;
|
|
continue;
|
|
} else if((compositeAndFwd=combine(compositionsList, c))>=0) {
|
|
// The starter and the combining mark (c) do combine.
|
|
UChar32 composite=compositeAndFwd>>1;
|
|
|
|
// Replace the starter with the composite, remove the combining mark.
|
|
pRemove=p-U16_LENGTH(c); // pRemove & p: start & limit of the combining mark
|
|
if(starterIsSupplementary) {
|
|
if(U_IS_SUPPLEMENTARY(composite)) {
|
|
// both are supplementary
|
|
starter[0]=U16_LEAD(composite);
|
|
starter[1]=U16_TRAIL(composite);
|
|
} else {
|
|
*starter=(char16_t)composite;
|
|
// The composite is shorter than the starter,
|
|
// move the intermediate characters forward one.
|
|
starterIsSupplementary=false;
|
|
q=starter+1;
|
|
r=q+1;
|
|
while(r<pRemove) {
|
|
*q++=*r++;
|
|
}
|
|
--pRemove;
|
|
}
|
|
} else if(U_IS_SUPPLEMENTARY(composite)) {
|
|
// The composite is longer than the starter,
|
|
// move the intermediate characters back one.
|
|
starterIsSupplementary=true;
|
|
++starter; // temporarily increment for the loop boundary
|
|
q=pRemove;
|
|
r=++pRemove;
|
|
while(starter<q) {
|
|
*--r=*--q;
|
|
}
|
|
*starter=U16_TRAIL(composite);
|
|
*--starter=U16_LEAD(composite); // undo the temporary increment
|
|
} else {
|
|
// both are on the BMP
|
|
*starter=(char16_t)composite;
|
|
}
|
|
|
|
/* remove the combining mark by moving the following text over it */
|
|
if(pRemove<p) {
|
|
q=pRemove;
|
|
r=p;
|
|
while(r<limit) {
|
|
*q++=*r++;
|
|
}
|
|
limit=q;
|
|
p=pRemove;
|
|
}
|
|
// Keep prevCC because we removed the combining mark.
|
|
|
|
if(p==limit) {
|
|
break;
|
|
}
|
|
// Is the composite a starter that combines forward?
|
|
if(compositeAndFwd&1) {
|
|
compositionsList=
|
|
getCompositionsListForComposite(getRawNorm16(composite));
|
|
} else {
|
|
compositionsList=nullptr;
|
|
}
|
|
|
|
// We combined; continue with looking for compositions.
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// no combination this time
|
|
prevCC=cc;
|
|
if(p==limit) {
|
|
break;
|
|
}
|
|
|
|
// If c did not combine, then check if it is a starter.
|
|
if(cc==0) {
|
|
// Found a new starter.
|
|
if((compositionsList=getCompositionsListForDecompYes(norm16))!=nullptr) {
|
|
// It may combine with something, prepare for it.
|
|
if(U_IS_BMP(c)) {
|
|
starterIsSupplementary=false;
|
|
starter=p-1;
|
|
} else {
|
|
starterIsSupplementary=true;
|
|
starter=p-2;
|
|
}
|
|
}
|
|
} else if(onlyContiguous) {
|
|
// FCC: no discontiguous compositions; any intervening character blocks.
|
|
compositionsList=nullptr;
|
|
}
|
|
}
|
|
buffer.setReorderingLimit(limit);
|
|
}
|
|
|
|
UChar32
|
|
Normalizer2Impl::composePair(UChar32 a, UChar32 b) const {
|
|
uint16_t norm16=getNorm16(a); // maps an out-of-range 'a' to inert norm16
|
|
const uint16_t *list;
|
|
if(isInert(norm16)) {
|
|
return U_SENTINEL;
|
|
} else if(norm16<minYesNoMappingsOnly) {
|
|
// a combines forward.
|
|
if(isJamoL(norm16)) {
|
|
b-=Hangul::JAMO_V_BASE;
|
|
if(0<=b && b<Hangul::JAMO_V_COUNT) {
|
|
return
|
|
(Hangul::HANGUL_BASE+
|
|
((a-Hangul::JAMO_L_BASE)*Hangul::JAMO_V_COUNT+b)*
|
|
Hangul::JAMO_T_COUNT);
|
|
} else {
|
|
return U_SENTINEL;
|
|
}
|
|
} else if(isHangulLV(norm16)) {
|
|
b-=Hangul::JAMO_T_BASE;
|
|
if(0<b && b<Hangul::JAMO_T_COUNT) { // not b==0!
|
|
return a+b;
|
|
} else {
|
|
return U_SENTINEL;
|
|
}
|
|
} else {
|
|
// 'a' has a compositions list in extraData
|
|
list=getMapping(norm16);
|
|
if(norm16>minYesNo) { // composite 'a' has both mapping & compositions list
|
|
list+= // mapping pointer
|
|
1+ // +1 to skip the first unit with the mapping length
|
|
(*list&MAPPING_LENGTH_MASK); // + mapping length
|
|
}
|
|
}
|
|
} else if(norm16<minMaybeYes || MIN_NORMAL_MAYBE_YES<=norm16) {
|
|
return U_SENTINEL;
|
|
} else {
|
|
list=getCompositionsListForMaybe(norm16);
|
|
}
|
|
if(b<0 || 0x10ffff<b) { // combine(list, b) requires a valid code point b
|
|
return U_SENTINEL;
|
|
}
|
|
#if U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC
|
|
return combine(list, b)>>1;
|
|
#else
|
|
int32_t compositeAndFwd=combine(list, b);
|
|
return compositeAndFwd>=0 ? compositeAndFwd>>1 : U_SENTINEL;
|
|
#endif
|
|
}
|
|
|
|
// Very similar to composeQuickCheck(): Make the same changes in both places if relevant.
|
|
// doCompose: normalize
|
|
// !doCompose: isNormalized (buffer must be empty and initialized)
|
|
UBool
|
|
Normalizer2Impl::compose(const char16_t *src, const char16_t *limit,
|
|
UBool onlyContiguous,
|
|
UBool doCompose,
|
|
ReorderingBuffer &buffer,
|
|
UErrorCode &errorCode) const {
|
|
const char16_t *prevBoundary=src;
|
|
UChar32 minNoMaybeCP=minCompNoMaybeCP;
|
|
if(limit==nullptr) {
|
|
src=copyLowPrefixFromNulTerminated(src, minNoMaybeCP,
|
|
doCompose ? &buffer : nullptr,
|
|
errorCode);
|
|
if(U_FAILURE(errorCode)) {
|
|
return false;
|
|
}
|
|
limit=u_strchr(src, 0);
|
|
if (prevBoundary != src) {
|
|
if (hasCompBoundaryAfter(*(src-1), onlyContiguous)) {
|
|
prevBoundary = src;
|
|
} else {
|
|
buffer.removeSuffix(1);
|
|
prevBoundary = --src;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (;;) {
|
|
// Fast path: Scan over a sequence of characters below the minimum "no or maybe" code point,
|
|
// or with (compYes && ccc==0) properties.
|
|
const char16_t *prevSrc;
|
|
UChar32 c = 0;
|
|
uint16_t norm16 = 0;
|
|
for (;;) {
|
|
if (src == limit) {
|
|
if (prevBoundary != limit && doCompose) {
|
|
buffer.appendZeroCC(prevBoundary, limit, errorCode);
|
|
}
|
|
return true;
|
|
}
|
|
if( (c=*src)<minNoMaybeCP ||
|
|
isCompYesAndZeroCC(norm16=UCPTRIE_FAST_BMP_GET(normTrie, UCPTRIE_16, c))
|
|
) {
|
|
++src;
|
|
} else {
|
|
prevSrc = src++;
|
|
if(!U16_IS_LEAD(c)) {
|
|
break;
|
|
} else {
|
|
char16_t c2;
|
|
if(src!=limit && U16_IS_TRAIL(c2=*src)) {
|
|
++src;
|
|
c=U16_GET_SUPPLEMENTARY(c, c2);
|
|
norm16=UCPTRIE_FAST_SUPP_GET(normTrie, UCPTRIE_16, c);
|
|
if(!isCompYesAndZeroCC(norm16)) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// isCompYesAndZeroCC(norm16) is false, that is, norm16>=minNoNo.
|
|
// The current character is either a "noNo" (has a mapping)
|
|
// or a "maybeYes" (combines backward)
|
|
// or a "yesYes" with ccc!=0.
|
|
// It is not a Hangul syllable or Jamo L because those have "yes" properties.
|
|
|
|
// Medium-fast path: Handle cases that do not require full decomposition and recomposition.
|
|
if (!isMaybeOrNonZeroCC(norm16)) { // minNoNo <= norm16 < minMaybeYes
|
|
if (!doCompose) {
|
|
return false;
|
|
}
|
|
// Fast path for mapping a character that is immediately surrounded by boundaries.
|
|
// In this case, we need not decompose around the current character.
|
|
if (isDecompNoAlgorithmic(norm16)) {
|
|
// Maps to a single isCompYesAndZeroCC character
|
|
// which also implies hasCompBoundaryBefore.
|
|
if (norm16HasCompBoundaryAfter(norm16, onlyContiguous) ||
|
|
hasCompBoundaryBefore(src, limit)) {
|
|
if (prevBoundary != prevSrc && !buffer.appendZeroCC(prevBoundary, prevSrc, errorCode)) {
|
|
break;
|
|
}
|
|
if(!buffer.append(mapAlgorithmic(c, norm16), 0, errorCode)) {
|
|
break;
|
|
}
|
|
prevBoundary = src;
|
|
continue;
|
|
}
|
|
} else if (norm16 < minNoNoCompBoundaryBefore) {
|
|
// The mapping is comp-normalized which also implies hasCompBoundaryBefore.
|
|
if (norm16HasCompBoundaryAfter(norm16, onlyContiguous) ||
|
|
hasCompBoundaryBefore(src, limit)) {
|
|
if (prevBoundary != prevSrc && !buffer.appendZeroCC(prevBoundary, prevSrc, errorCode)) {
|
|
break;
|
|
}
|
|
const char16_t *mapping = reinterpret_cast<const char16_t *>(getMapping(norm16));
|
|
int32_t length = *mapping++ & MAPPING_LENGTH_MASK;
|
|
if(!buffer.appendZeroCC(mapping, mapping + length, errorCode)) {
|
|
break;
|
|
}
|
|
prevBoundary = src;
|
|
continue;
|
|
}
|
|
} else if (norm16 >= minNoNoEmpty) {
|
|
// The current character maps to nothing.
|
|
// Simply omit it from the output if there is a boundary before _or_ after it.
|
|
// The character itself implies no boundaries.
|
|
if (hasCompBoundaryBefore(src, limit) ||
|
|
hasCompBoundaryAfter(prevBoundary, prevSrc, onlyContiguous)) {
|
|
if (prevBoundary != prevSrc && !buffer.appendZeroCC(prevBoundary, prevSrc, errorCode)) {
|
|
break;
|
|
}
|
|
prevBoundary = src;
|
|
continue;
|
|
}
|
|
}
|
|
// Other "noNo" type, or need to examine more text around this character:
|
|
// Fall through to the slow path.
|
|
} else if (isJamoVT(norm16) && prevBoundary != prevSrc) {
|
|
char16_t prev=*(prevSrc-1);
|
|
if(c<Hangul::JAMO_T_BASE) {
|
|
// The current character is a Jamo Vowel,
|
|
// compose with previous Jamo L and following Jamo T.
|
|
char16_t l = (char16_t)(prev-Hangul::JAMO_L_BASE);
|
|
if(l<Hangul::JAMO_L_COUNT) {
|
|
if (!doCompose) {
|
|
return false;
|
|
}
|
|
int32_t t;
|
|
if (src != limit &&
|
|
0 < (t = ((int32_t)*src - Hangul::JAMO_T_BASE)) &&
|
|
t < Hangul::JAMO_T_COUNT) {
|
|
// The next character is a Jamo T.
|
|
++src;
|
|
} else if (hasCompBoundaryBefore(src, limit)) {
|
|
// No Jamo T follows, not even via decomposition.
|
|
t = 0;
|
|
} else {
|
|
t = -1;
|
|
}
|
|
if (t >= 0) {
|
|
UChar32 syllable = Hangul::HANGUL_BASE +
|
|
(l*Hangul::JAMO_V_COUNT + (c-Hangul::JAMO_V_BASE)) *
|
|
Hangul::JAMO_T_COUNT + t;
|
|
--prevSrc; // Replace the Jamo L as well.
|
|
if (prevBoundary != prevSrc && !buffer.appendZeroCC(prevBoundary, prevSrc, errorCode)) {
|
|
break;
|
|
}
|
|
if(!buffer.appendBMP((char16_t)syllable, 0, errorCode)) {
|
|
break;
|
|
}
|
|
prevBoundary = src;
|
|
continue;
|
|
}
|
|
// If we see L+V+x where x!=T then we drop to the slow path,
|
|
// decompose and recompose.
|
|
// This is to deal with NFKC finding normal L and V but a
|
|
// compatibility variant of a T.
|
|
// We need to either fully compose that combination here
|
|
// (which would complicate the code and may not work with strange custom data)
|
|
// or use the slow path.
|
|
}
|
|
} else if (Hangul::isHangulLV(prev)) {
|
|
// The current character is a Jamo Trailing consonant,
|
|
// compose with previous Hangul LV that does not contain a Jamo T.
|
|
if (!doCompose) {
|
|
return false;
|
|
}
|
|
UChar32 syllable = prev + c - Hangul::JAMO_T_BASE;
|
|
--prevSrc; // Replace the Hangul LV as well.
|
|
if (prevBoundary != prevSrc && !buffer.appendZeroCC(prevBoundary, prevSrc, errorCode)) {
|
|
break;
|
|
}
|
|
if(!buffer.appendBMP((char16_t)syllable, 0, errorCode)) {
|
|
break;
|
|
}
|
|
prevBoundary = src;
|
|
continue;
|
|
}
|
|
// No matching context, or may need to decompose surrounding text first:
|
|
// Fall through to the slow path.
|
|
} else if (norm16 > JAMO_VT) { // norm16 >= MIN_YES_YES_WITH_CC
|
|
// One or more combining marks that do not combine-back:
|
|
// Check for canonical order, copy unchanged if ok and
|
|
// if followed by a character with a boundary-before.
|
|
uint8_t cc = getCCFromNormalYesOrMaybe(norm16); // cc!=0
|
|
if (onlyContiguous /* FCC */ && getPreviousTrailCC(prevBoundary, prevSrc) > cc) {
|
|
// Fails FCD test, need to decompose and contiguously recompose.
|
|
if (!doCompose) {
|
|
return false;
|
|
}
|
|
} else {
|
|
// If !onlyContiguous (not FCC), then we ignore the tccc of
|
|
// the previous character which passed the quick check "yes && ccc==0" test.
|
|
const char16_t *nextSrc;
|
|
uint16_t n16;
|
|
for (;;) {
|
|
if (src == limit) {
|
|
if (doCompose) {
|
|
buffer.appendZeroCC(prevBoundary, limit, errorCode);
|
|
}
|
|
return true;
|
|
}
|
|
uint8_t prevCC = cc;
|
|
nextSrc = src;
|
|
UCPTRIE_FAST_U16_NEXT(normTrie, UCPTRIE_16, nextSrc, limit, c, n16);
|
|
if (n16 >= MIN_YES_YES_WITH_CC) {
|
|
cc = getCCFromNormalYesOrMaybe(n16);
|
|
if (prevCC > cc) {
|
|
if (!doCompose) {
|
|
return false;
|
|
}
|
|
break;
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
src = nextSrc;
|
|
}
|
|
// src is after the last in-order combining mark.
|
|
// If there is a boundary here, then we continue with no change.
|
|
if (norm16HasCompBoundaryBefore(n16)) {
|
|
if (isCompYesAndZeroCC(n16)) {
|
|
src = nextSrc;
|
|
}
|
|
continue;
|
|
}
|
|
// Use the slow path. There is no boundary in [prevSrc, src[.
|
|
}
|
|
}
|
|
|
|
// Slow path: Find the nearest boundaries around the current character,
|
|
// decompose and recompose.
|
|
if (prevBoundary != prevSrc && !norm16HasCompBoundaryBefore(norm16)) {
|
|
const char16_t *p = prevSrc;
|
|
UCPTRIE_FAST_U16_PREV(normTrie, UCPTRIE_16, prevBoundary, p, c, norm16);
|
|
if (!norm16HasCompBoundaryAfter(norm16, onlyContiguous)) {
|
|
prevSrc = p;
|
|
}
|
|
}
|
|
if (doCompose && prevBoundary != prevSrc && !buffer.appendZeroCC(prevBoundary, prevSrc, errorCode)) {
|
|
break;
|
|
}
|
|
int32_t recomposeStartIndex=buffer.length();
|
|
// We know there is not a boundary here.
|
|
decomposeShort(prevSrc, src, false /* !stopAtCompBoundary */, onlyContiguous,
|
|
buffer, errorCode);
|
|
// Decompose until the next boundary.
|
|
src = decomposeShort(src, limit, true /* stopAtCompBoundary */, onlyContiguous,
|
|
buffer, errorCode);
|
|
if (U_FAILURE(errorCode)) {
|
|
break;
|
|
}
|
|
if ((src - prevSrc) > INT32_MAX) { // guard before buffer.equals()
|
|
errorCode = U_INDEX_OUTOFBOUNDS_ERROR;
|
|
return true;
|
|
}
|
|
recompose(buffer, recomposeStartIndex, onlyContiguous);
|
|
if(!doCompose) {
|
|
if(!buffer.equals(prevSrc, src)) {
|
|
return false;
|
|
}
|
|
buffer.remove();
|
|
}
|
|
prevBoundary=src;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// Very similar to compose(): Make the same changes in both places if relevant.
|
|
// pQCResult==nullptr: spanQuickCheckYes
|
|
// pQCResult!=nullptr: quickCheck (*pQCResult must be UNORM_YES)
|
|
const char16_t *
|
|
Normalizer2Impl::composeQuickCheck(const char16_t *src, const char16_t *limit,
|
|
UBool onlyContiguous,
|
|
UNormalizationCheckResult *pQCResult) const {
|
|
const char16_t *prevBoundary=src;
|
|
UChar32 minNoMaybeCP=minCompNoMaybeCP;
|
|
if(limit==nullptr) {
|
|
UErrorCode errorCode=U_ZERO_ERROR;
|
|
src=copyLowPrefixFromNulTerminated(src, minNoMaybeCP, nullptr, errorCode);
|
|
limit=u_strchr(src, 0);
|
|
if (prevBoundary != src) {
|
|
if (hasCompBoundaryAfter(*(src-1), onlyContiguous)) {
|
|
prevBoundary = src;
|
|
} else {
|
|
prevBoundary = --src;
|
|
}
|
|
}
|
|
}
|
|
|
|
for(;;) {
|
|
// Fast path: Scan over a sequence of characters below the minimum "no or maybe" code point,
|
|
// or with (compYes && ccc==0) properties.
|
|
const char16_t *prevSrc;
|
|
UChar32 c = 0;
|
|
uint16_t norm16 = 0;
|
|
for (;;) {
|
|
if(src==limit) {
|
|
return src;
|
|
}
|
|
if( (c=*src)<minNoMaybeCP ||
|
|
isCompYesAndZeroCC(norm16=UCPTRIE_FAST_BMP_GET(normTrie, UCPTRIE_16, c))
|
|
) {
|
|
++src;
|
|
} else {
|
|
prevSrc = src++;
|
|
if(!U16_IS_LEAD(c)) {
|
|
break;
|
|
} else {
|
|
char16_t c2;
|
|
if(src!=limit && U16_IS_TRAIL(c2=*src)) {
|
|
++src;
|
|
c=U16_GET_SUPPLEMENTARY(c, c2);
|
|
norm16=UCPTRIE_FAST_SUPP_GET(normTrie, UCPTRIE_16, c);
|
|
if(!isCompYesAndZeroCC(norm16)) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// isCompYesAndZeroCC(norm16) is false, that is, norm16>=minNoNo.
|
|
// The current character is either a "noNo" (has a mapping)
|
|
// or a "maybeYes" (combines backward)
|
|
// or a "yesYes" with ccc!=0.
|
|
// It is not a Hangul syllable or Jamo L because those have "yes" properties.
|
|
|
|
uint16_t prevNorm16 = INERT;
|
|
if (prevBoundary != prevSrc) {
|
|
if (norm16HasCompBoundaryBefore(norm16)) {
|
|
prevBoundary = prevSrc;
|
|
} else {
|
|
const char16_t *p = prevSrc;
|
|
uint16_t n16;
|
|
UCPTRIE_FAST_U16_PREV(normTrie, UCPTRIE_16, prevBoundary, p, c, n16);
|
|
if (norm16HasCompBoundaryAfter(n16, onlyContiguous)) {
|
|
prevBoundary = prevSrc;
|
|
} else {
|
|
prevBoundary = p;
|
|
prevNorm16 = n16;
|
|
}
|
|
}
|
|
}
|
|
|
|
if(isMaybeOrNonZeroCC(norm16)) {
|
|
uint8_t cc=getCCFromYesOrMaybe(norm16);
|
|
if (onlyContiguous /* FCC */ && cc != 0 &&
|
|
getTrailCCFromCompYesAndZeroCC(prevNorm16) > cc) {
|
|
// The [prevBoundary..prevSrc[ character
|
|
// passed the quick check "yes && ccc==0" test
|
|
// but is out of canonical order with the current combining mark.
|
|
} else {
|
|
// If !onlyContiguous (not FCC), then we ignore the tccc of
|
|
// the previous character which passed the quick check "yes && ccc==0" test.
|
|
const char16_t *nextSrc;
|
|
for (;;) {
|
|
if (norm16 < MIN_YES_YES_WITH_CC) {
|
|
if (pQCResult != nullptr) {
|
|
*pQCResult = UNORM_MAYBE;
|
|
} else {
|
|
return prevBoundary;
|
|
}
|
|
}
|
|
if (src == limit) {
|
|
return src;
|
|
}
|
|
uint8_t prevCC = cc;
|
|
nextSrc = src;
|
|
UCPTRIE_FAST_U16_NEXT(normTrie, UCPTRIE_16, nextSrc, limit, c, norm16);
|
|
if (isMaybeOrNonZeroCC(norm16)) {
|
|
cc = getCCFromYesOrMaybe(norm16);
|
|
if (!(prevCC <= cc || cc == 0)) {
|
|
break;
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
src = nextSrc;
|
|
}
|
|
// src is after the last in-order combining mark.
|
|
if (isCompYesAndZeroCC(norm16)) {
|
|
prevBoundary = src;
|
|
src = nextSrc;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
if(pQCResult!=nullptr) {
|
|
*pQCResult=UNORM_NO;
|
|
}
|
|
return prevBoundary;
|
|
}
|
|
}
|
|
|
|
void Normalizer2Impl::composeAndAppend(const char16_t *src, const char16_t *limit,
|
|
UBool doCompose,
|
|
UBool onlyContiguous,
|
|
UnicodeString &safeMiddle,
|
|
ReorderingBuffer &buffer,
|
|
UErrorCode &errorCode) const {
|
|
if(!buffer.isEmpty()) {
|
|
const char16_t *firstStarterInSrc=findNextCompBoundary(src, limit, onlyContiguous);
|
|
if(src!=firstStarterInSrc) {
|
|
const char16_t *lastStarterInDest=findPreviousCompBoundary(buffer.getStart(),
|
|
buffer.getLimit(), onlyContiguous);
|
|
int32_t destSuffixLength=(int32_t)(buffer.getLimit()-lastStarterInDest);
|
|
UnicodeString middle(lastStarterInDest, destSuffixLength);
|
|
buffer.removeSuffix(destSuffixLength);
|
|
safeMiddle=middle;
|
|
middle.append(src, (int32_t)(firstStarterInSrc-src));
|
|
const char16_t *middleStart=middle.getBuffer();
|
|
compose(middleStart, middleStart+middle.length(), onlyContiguous,
|
|
true, buffer, errorCode);
|
|
if(U_FAILURE(errorCode)) {
|
|
return;
|
|
}
|
|
src=firstStarterInSrc;
|
|
}
|
|
}
|
|
if(doCompose) {
|
|
compose(src, limit, onlyContiguous, true, buffer, errorCode);
|
|
} else {
|
|
if(limit==nullptr) { // appendZeroCC() needs limit!=nullptr
|
|
limit=u_strchr(src, 0);
|
|
}
|
|
buffer.appendZeroCC(src, limit, errorCode);
|
|
}
|
|
}
|
|
|
|
UBool
|
|
Normalizer2Impl::composeUTF8(uint32_t options, UBool onlyContiguous,
|
|
const uint8_t *src, const uint8_t *limit,
|
|
ByteSink *sink, Edits *edits, UErrorCode &errorCode) const {
|
|
U_ASSERT(limit != nullptr);
|
|
UnicodeString s16;
|
|
uint8_t minNoMaybeLead = leadByteForCP(minCompNoMaybeCP);
|
|
const uint8_t *prevBoundary = src;
|
|
|
|
for (;;) {
|
|
// Fast path: Scan over a sequence of characters below the minimum "no or maybe" code point,
|
|
// or with (compYes && ccc==0) properties.
|
|
const uint8_t *prevSrc;
|
|
uint16_t norm16 = 0;
|
|
for (;;) {
|
|
if (src == limit) {
|
|
if (prevBoundary != limit && sink != nullptr) {
|
|
ByteSinkUtil::appendUnchanged(prevBoundary, limit,
|
|
*sink, options, edits, errorCode);
|
|
}
|
|
return true;
|
|
}
|
|
if (*src < minNoMaybeLead) {
|
|
++src;
|
|
} else {
|
|
prevSrc = src;
|
|
UCPTRIE_FAST_U8_NEXT(normTrie, UCPTRIE_16, src, limit, norm16);
|
|
if (!isCompYesAndZeroCC(norm16)) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// isCompYesAndZeroCC(norm16) is false, that is, norm16>=minNoNo.
|
|
// The current character is either a "noNo" (has a mapping)
|
|
// or a "maybeYes" (combines backward)
|
|
// or a "yesYes" with ccc!=0.
|
|
// It is not a Hangul syllable or Jamo L because those have "yes" properties.
|
|
|
|
// Medium-fast path: Handle cases that do not require full decomposition and recomposition.
|
|
if (!isMaybeOrNonZeroCC(norm16)) { // minNoNo <= norm16 < minMaybeYes
|
|
if (sink == nullptr) {
|
|
return false;
|
|
}
|
|
// Fast path for mapping a character that is immediately surrounded by boundaries.
|
|
// In this case, we need not decompose around the current character.
|
|
if (isDecompNoAlgorithmic(norm16)) {
|
|
// Maps to a single isCompYesAndZeroCC character
|
|
// which also implies hasCompBoundaryBefore.
|
|
if (norm16HasCompBoundaryAfter(norm16, onlyContiguous) ||
|
|
hasCompBoundaryBefore(src, limit)) {
|
|
if (prevBoundary != prevSrc &&
|
|
!ByteSinkUtil::appendUnchanged(prevBoundary, prevSrc,
|
|
*sink, options, edits, errorCode)) {
|
|
break;
|
|
}
|
|
appendCodePointDelta(prevSrc, src, getAlgorithmicDelta(norm16), *sink, edits);
|
|
prevBoundary = src;
|
|
continue;
|
|
}
|
|
} else if (norm16 < minNoNoCompBoundaryBefore) {
|
|
// The mapping is comp-normalized which also implies hasCompBoundaryBefore.
|
|
if (norm16HasCompBoundaryAfter(norm16, onlyContiguous) ||
|
|
hasCompBoundaryBefore(src, limit)) {
|
|
if (prevBoundary != prevSrc &&
|
|
!ByteSinkUtil::appendUnchanged(prevBoundary, prevSrc,
|
|
*sink, options, edits, errorCode)) {
|
|
break;
|
|
}
|
|
const uint16_t *mapping = getMapping(norm16);
|
|
int32_t length = *mapping++ & MAPPING_LENGTH_MASK;
|
|
if (!ByteSinkUtil::appendChange(prevSrc, src, (const char16_t *)mapping, length,
|
|
*sink, edits, errorCode)) {
|
|
break;
|
|
}
|
|
prevBoundary = src;
|
|
continue;
|
|
}
|
|
} else if (norm16 >= minNoNoEmpty) {
|
|
// The current character maps to nothing.
|
|
// Simply omit it from the output if there is a boundary before _or_ after it.
|
|
// The character itself implies no boundaries.
|
|
if (hasCompBoundaryBefore(src, limit) ||
|
|
hasCompBoundaryAfter(prevBoundary, prevSrc, onlyContiguous)) {
|
|
if (prevBoundary != prevSrc &&
|
|
!ByteSinkUtil::appendUnchanged(prevBoundary, prevSrc,
|
|
*sink, options, edits, errorCode)) {
|
|
break;
|
|
}
|
|
if (edits != nullptr) {
|
|
edits->addReplace((int32_t)(src - prevSrc), 0);
|
|
}
|
|
prevBoundary = src;
|
|
continue;
|
|
}
|
|
}
|
|
// Other "noNo" type, or need to examine more text around this character:
|
|
// Fall through to the slow path.
|
|
} else if (isJamoVT(norm16)) {
|
|
// Jamo L: E1 84 80..92
|
|
// Jamo V: E1 85 A1..B5
|
|
// Jamo T: E1 86 A8..E1 87 82
|
|
U_ASSERT((src - prevSrc) == 3 && *prevSrc == 0xe1);
|
|
UChar32 prev = previousHangulOrJamo(prevBoundary, prevSrc);
|
|
if (prevSrc[1] == 0x85) {
|
|
// The current character is a Jamo Vowel,
|
|
// compose with previous Jamo L and following Jamo T.
|
|
UChar32 l = prev - Hangul::JAMO_L_BASE;
|
|
if ((uint32_t)l < Hangul::JAMO_L_COUNT) {
|
|
if (sink == nullptr) {
|
|
return false;
|
|
}
|
|
int32_t t = getJamoTMinusBase(src, limit);
|
|
if (t >= 0) {
|
|
// The next character is a Jamo T.
|
|
src += 3;
|
|
} else if (hasCompBoundaryBefore(src, limit)) {
|
|
// No Jamo T follows, not even via decomposition.
|
|
t = 0;
|
|
}
|
|
if (t >= 0) {
|
|
UChar32 syllable = Hangul::HANGUL_BASE +
|
|
(l*Hangul::JAMO_V_COUNT + (prevSrc[2]-0xa1)) *
|
|
Hangul::JAMO_T_COUNT + t;
|
|
prevSrc -= 3; // Replace the Jamo L as well.
|
|
if (prevBoundary != prevSrc &&
|
|
!ByteSinkUtil::appendUnchanged(prevBoundary, prevSrc,
|
|
*sink, options, edits, errorCode)) {
|
|
break;
|
|
}
|
|
ByteSinkUtil::appendCodePoint(prevSrc, src, syllable, *sink, edits);
|
|
prevBoundary = src;
|
|
continue;
|
|
}
|
|
// If we see L+V+x where x!=T then we drop to the slow path,
|
|
// decompose and recompose.
|
|
// This is to deal with NFKC finding normal L and V but a
|
|
// compatibility variant of a T.
|
|
// We need to either fully compose that combination here
|
|
// (which would complicate the code and may not work with strange custom data)
|
|
// or use the slow path.
|
|
}
|
|
} else if (Hangul::isHangulLV(prev)) {
|
|
// The current character is a Jamo Trailing consonant,
|
|
// compose with previous Hangul LV that does not contain a Jamo T.
|
|
if (sink == nullptr) {
|
|
return false;
|
|
}
|
|
UChar32 syllable = prev + getJamoTMinusBase(prevSrc, src);
|
|
prevSrc -= 3; // Replace the Hangul LV as well.
|
|
if (prevBoundary != prevSrc &&
|
|
!ByteSinkUtil::appendUnchanged(prevBoundary, prevSrc,
|
|
*sink, options, edits, errorCode)) {
|
|
break;
|
|
}
|
|
ByteSinkUtil::appendCodePoint(prevSrc, src, syllable, *sink, edits);
|
|
prevBoundary = src;
|
|
continue;
|
|
}
|
|
// No matching context, or may need to decompose surrounding text first:
|
|
// Fall through to the slow path.
|
|
} else if (norm16 > JAMO_VT) { // norm16 >= MIN_YES_YES_WITH_CC
|
|
// One or more combining marks that do not combine-back:
|
|
// Check for canonical order, copy unchanged if ok and
|
|
// if followed by a character with a boundary-before.
|
|
uint8_t cc = getCCFromNormalYesOrMaybe(norm16); // cc!=0
|
|
if (onlyContiguous /* FCC */ && getPreviousTrailCC(prevBoundary, prevSrc) > cc) {
|
|
// Fails FCD test, need to decompose and contiguously recompose.
|
|
if (sink == nullptr) {
|
|
return false;
|
|
}
|
|
} else {
|
|
// If !onlyContiguous (not FCC), then we ignore the tccc of
|
|
// the previous character which passed the quick check "yes && ccc==0" test.
|
|
const uint8_t *nextSrc;
|
|
uint16_t n16;
|
|
for (;;) {
|
|
if (src == limit) {
|
|
if (sink != nullptr) {
|
|
ByteSinkUtil::appendUnchanged(prevBoundary, limit,
|
|
*sink, options, edits, errorCode);
|
|
}
|
|
return true;
|
|
}
|
|
uint8_t prevCC = cc;
|
|
nextSrc = src;
|
|
UCPTRIE_FAST_U8_NEXT(normTrie, UCPTRIE_16, nextSrc, limit, n16);
|
|
if (n16 >= MIN_YES_YES_WITH_CC) {
|
|
cc = getCCFromNormalYesOrMaybe(n16);
|
|
if (prevCC > cc) {
|
|
if (sink == nullptr) {
|
|
return false;
|
|
}
|
|
break;
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
src = nextSrc;
|
|
}
|
|
// src is after the last in-order combining mark.
|
|
// If there is a boundary here, then we continue with no change.
|
|
if (norm16HasCompBoundaryBefore(n16)) {
|
|
if (isCompYesAndZeroCC(n16)) {
|
|
src = nextSrc;
|
|
}
|
|
continue;
|
|
}
|
|
// Use the slow path. There is no boundary in [prevSrc, src[.
|
|
}
|
|
}
|
|
|
|
// Slow path: Find the nearest boundaries around the current character,
|
|
// decompose and recompose.
|
|
if (prevBoundary != prevSrc && !norm16HasCompBoundaryBefore(norm16)) {
|
|
const uint8_t *p = prevSrc;
|
|
UCPTRIE_FAST_U8_PREV(normTrie, UCPTRIE_16, prevBoundary, p, norm16);
|
|
if (!norm16HasCompBoundaryAfter(norm16, onlyContiguous)) {
|
|
prevSrc = p;
|
|
}
|
|
}
|
|
ReorderingBuffer buffer(*this, s16, errorCode);
|
|
if (U_FAILURE(errorCode)) {
|
|
break;
|
|
}
|
|
// We know there is not a boundary here.
|
|
decomposeShort(prevSrc, src, STOP_AT_LIMIT, onlyContiguous,
|
|
buffer, errorCode);
|
|
// Decompose until the next boundary.
|
|
src = decomposeShort(src, limit, STOP_AT_COMP_BOUNDARY, onlyContiguous,
|
|
buffer, errorCode);
|
|
if (U_FAILURE(errorCode)) {
|
|
break;
|
|
}
|
|
if ((src - prevSrc) > INT32_MAX) { // guard before buffer.equals()
|
|
errorCode = U_INDEX_OUTOFBOUNDS_ERROR;
|
|
return true;
|
|
}
|
|
recompose(buffer, 0, onlyContiguous);
|
|
if (!buffer.equals(prevSrc, src)) {
|
|
if (sink == nullptr) {
|
|
return false;
|
|
}
|
|
if (prevBoundary != prevSrc &&
|
|
!ByteSinkUtil::appendUnchanged(prevBoundary, prevSrc,
|
|
*sink, options, edits, errorCode)) {
|
|
break;
|
|
}
|
|
if (!ByteSinkUtil::appendChange(prevSrc, src, buffer.getStart(), buffer.length(),
|
|
*sink, edits, errorCode)) {
|
|
break;
|
|
}
|
|
prevBoundary = src;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
UBool Normalizer2Impl::hasCompBoundaryBefore(const char16_t *src, const char16_t *limit) const {
|
|
if (src == limit || *src < minCompNoMaybeCP) {
|
|
return true;
|
|
}
|
|
UChar32 c;
|
|
uint16_t norm16;
|
|
UCPTRIE_FAST_U16_NEXT(normTrie, UCPTRIE_16, src, limit, c, norm16);
|
|
return norm16HasCompBoundaryBefore(norm16);
|
|
}
|
|
|
|
UBool Normalizer2Impl::hasCompBoundaryBefore(const uint8_t *src, const uint8_t *limit) const {
|
|
if (src == limit) {
|
|
return true;
|
|
}
|
|
uint16_t norm16;
|
|
UCPTRIE_FAST_U8_NEXT(normTrie, UCPTRIE_16, src, limit, norm16);
|
|
return norm16HasCompBoundaryBefore(norm16);
|
|
}
|
|
|
|
UBool Normalizer2Impl::hasCompBoundaryAfter(const char16_t *start, const char16_t *p,
|
|
UBool onlyContiguous) const {
|
|
if (start == p) {
|
|
return true;
|
|
}
|
|
UChar32 c;
|
|
uint16_t norm16;
|
|
UCPTRIE_FAST_U16_PREV(normTrie, UCPTRIE_16, start, p, c, norm16);
|
|
return norm16HasCompBoundaryAfter(norm16, onlyContiguous);
|
|
}
|
|
|
|
UBool Normalizer2Impl::hasCompBoundaryAfter(const uint8_t *start, const uint8_t *p,
|
|
UBool onlyContiguous) const {
|
|
if (start == p) {
|
|
return true;
|
|
}
|
|
uint16_t norm16;
|
|
UCPTRIE_FAST_U8_PREV(normTrie, UCPTRIE_16, start, p, norm16);
|
|
return norm16HasCompBoundaryAfter(norm16, onlyContiguous);
|
|
}
|
|
|
|
const char16_t *Normalizer2Impl::findPreviousCompBoundary(const char16_t *start, const char16_t *p,
|
|
UBool onlyContiguous) const {
|
|
while (p != start) {
|
|
const char16_t *codePointLimit = p;
|
|
UChar32 c;
|
|
uint16_t norm16;
|
|
UCPTRIE_FAST_U16_PREV(normTrie, UCPTRIE_16, start, p, c, norm16);
|
|
if (norm16HasCompBoundaryAfter(norm16, onlyContiguous)) {
|
|
return codePointLimit;
|
|
}
|
|
if (hasCompBoundaryBefore(c, norm16)) {
|
|
return p;
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|
|
const char16_t *Normalizer2Impl::findNextCompBoundary(const char16_t *p, const char16_t *limit,
|
|
UBool onlyContiguous) const {
|
|
while (p != limit) {
|
|
const char16_t *codePointStart = p;
|
|
UChar32 c;
|
|
uint16_t norm16;
|
|
UCPTRIE_FAST_U16_NEXT(normTrie, UCPTRIE_16, p, limit, c, norm16);
|
|
if (hasCompBoundaryBefore(c, norm16)) {
|
|
return codePointStart;
|
|
}
|
|
if (norm16HasCompBoundaryAfter(norm16, onlyContiguous)) {
|
|
return p;
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|
|
uint8_t Normalizer2Impl::getPreviousTrailCC(const char16_t *start, const char16_t *p) const {
|
|
if (start == p) {
|
|
return 0;
|
|
}
|
|
int32_t i = (int32_t)(p - start);
|
|
UChar32 c;
|
|
U16_PREV(start, 0, i, c);
|
|
return (uint8_t)getFCD16(c);
|
|
}
|
|
|
|
uint8_t Normalizer2Impl::getPreviousTrailCC(const uint8_t *start, const uint8_t *p) const {
|
|
if (start == p) {
|
|
return 0;
|
|
}
|
|
int32_t i = (int32_t)(p - start);
|
|
UChar32 c;
|
|
U8_PREV(start, 0, i, c);
|
|
return (uint8_t)getFCD16(c);
|
|
}
|
|
|
|
// Note: normalizer2impl.cpp r30982 (2011-nov-27)
|
|
// still had getFCDTrie() which built and cached an FCD trie.
|
|
// That provided faster access to FCD data than getFCD16FromNormData()
|
|
// but required synchronization and consumed some 10kB of heap memory
|
|
// in any process that uses FCD (e.g., via collation).
|
|
// minDecompNoCP etc. and smallFCD[] are intended to help with any loss of performance,
|
|
// at least for ASCII & CJK.
|
|
|
|
// Ticket 20907 - The optimizer in MSVC/Visual Studio versions below 16.4 has trouble with this
|
|
// function on Windows ARM64. As a work-around, we disable optimizations for this function.
|
|
// This work-around could/should be removed once the following versions of Visual Studio are no
|
|
// longer supported: All versions of VS2017, and versions of VS2019 below 16.4.
|
|
#if (defined(_MSC_VER) && (defined(_M_ARM64)) && (_MSC_VER < 1924))
|
|
#pragma optimize( "", off )
|
|
#endif
|
|
// Gets the FCD value from the regular normalization data.
|
|
uint16_t Normalizer2Impl::getFCD16FromNormData(UChar32 c) const {
|
|
uint16_t norm16=getNorm16(c);
|
|
if (norm16 >= limitNoNo) {
|
|
if(norm16>=MIN_NORMAL_MAYBE_YES) {
|
|
// combining mark
|
|
norm16=getCCFromNormalYesOrMaybe(norm16);
|
|
return norm16|(norm16<<8);
|
|
} else if(norm16>=minMaybeYes) {
|
|
return 0;
|
|
} else { // isDecompNoAlgorithmic(norm16)
|
|
uint16_t deltaTrailCC = norm16 & DELTA_TCCC_MASK;
|
|
if (deltaTrailCC <= DELTA_TCCC_1) {
|
|
return deltaTrailCC >> OFFSET_SHIFT;
|
|
}
|
|
// Maps to an isCompYesAndZeroCC.
|
|
c=mapAlgorithmic(c, norm16);
|
|
norm16=getRawNorm16(c);
|
|
}
|
|
}
|
|
if(norm16<=minYesNo || isHangulLVT(norm16)) {
|
|
// no decomposition or Hangul syllable, all zeros
|
|
return 0;
|
|
}
|
|
// c decomposes, get everything from the variable-length extra data
|
|
const uint16_t *mapping=getMapping(norm16);
|
|
uint16_t firstUnit=*mapping;
|
|
norm16=firstUnit>>8; // tccc
|
|
if(firstUnit&MAPPING_HAS_CCC_LCCC_WORD) {
|
|
norm16|=*(mapping-1)&0xff00; // lccc
|
|
}
|
|
return norm16;
|
|
}
|
|
#if (defined(_MSC_VER) && (defined(_M_ARM64)) && (_MSC_VER < 1924))
|
|
#pragma optimize( "", on )
|
|
#endif
|
|
|
|
// Dual functionality:
|
|
// buffer!=nullptr: normalize
|
|
// buffer==nullptr: isNormalized/quickCheck/spanQuickCheckYes
|
|
const char16_t *
|
|
Normalizer2Impl::makeFCD(const char16_t *src, const char16_t *limit,
|
|
ReorderingBuffer *buffer,
|
|
UErrorCode &errorCode) const {
|
|
// Tracks the last FCD-safe boundary, before lccc=0 or after properly-ordered tccc<=1.
|
|
// Similar to the prevBoundary in the compose() implementation.
|
|
const char16_t *prevBoundary=src;
|
|
int32_t prevFCD16=0;
|
|
if(limit==nullptr) {
|
|
src=copyLowPrefixFromNulTerminated(src, minLcccCP, buffer, errorCode);
|
|
if(U_FAILURE(errorCode)) {
|
|
return src;
|
|
}
|
|
if(prevBoundary<src) {
|
|
prevBoundary=src;
|
|
// We know that the previous character's lccc==0.
|
|
// Fetching the fcd16 value was deferred for this below-U+0300 code point.
|
|
prevFCD16=getFCD16(*(src-1));
|
|
if(prevFCD16>1) {
|
|
--prevBoundary;
|
|
}
|
|
}
|
|
limit=u_strchr(src, 0);
|
|
}
|
|
|
|
// Note: In this function we use buffer->appendZeroCC() because we track
|
|
// the lead and trail combining classes here, rather than leaving it to
|
|
// the ReorderingBuffer.
|
|
// The exception is the call to decomposeShort() which uses the buffer
|
|
// in the normal way.
|
|
|
|
const char16_t *prevSrc;
|
|
UChar32 c=0;
|
|
uint16_t fcd16=0;
|
|
|
|
for(;;) {
|
|
// count code units with lccc==0
|
|
for(prevSrc=src; src!=limit;) {
|
|
if((c=*src)<minLcccCP) {
|
|
prevFCD16=~c;
|
|
++src;
|
|
} else if(!singleLeadMightHaveNonZeroFCD16(c)) {
|
|
prevFCD16=0;
|
|
++src;
|
|
} else {
|
|
if(U16_IS_LEAD(c)) {
|
|
char16_t c2;
|
|
if((src+1)!=limit && U16_IS_TRAIL(c2=src[1])) {
|
|
c=U16_GET_SUPPLEMENTARY(c, c2);
|
|
}
|
|
}
|
|
if((fcd16=getFCD16FromNormData(c))<=0xff) {
|
|
prevFCD16=fcd16;
|
|
src+=U16_LENGTH(c);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// copy these code units all at once
|
|
if(src!=prevSrc) {
|
|
if(buffer!=nullptr && !buffer->appendZeroCC(prevSrc, src, errorCode)) {
|
|
break;
|
|
}
|
|
if(src==limit) {
|
|
break;
|
|
}
|
|
prevBoundary=src;
|
|
// We know that the previous character's lccc==0.
|
|
if(prevFCD16<0) {
|
|
// Fetching the fcd16 value was deferred for this below-minLcccCP code point.
|
|
UChar32 prev=~prevFCD16;
|
|
if(prev<minDecompNoCP) {
|
|
prevFCD16=0;
|
|
} else {
|
|
prevFCD16=getFCD16FromNormData(prev);
|
|
if(prevFCD16>1) {
|
|
--prevBoundary;
|
|
}
|
|
}
|
|
} else {
|
|
const char16_t *p=src-1;
|
|
if(U16_IS_TRAIL(*p) && prevSrc<p && U16_IS_LEAD(*(p-1))) {
|
|
--p;
|
|
// Need to fetch the previous character's FCD value because
|
|
// prevFCD16 was just for the trail surrogate code point.
|
|
prevFCD16=getFCD16FromNormData(U16_GET_SUPPLEMENTARY(p[0], p[1]));
|
|
// Still known to have lccc==0 because its lead surrogate unit had lccc==0.
|
|
}
|
|
if(prevFCD16>1) {
|
|
prevBoundary=p;
|
|
}
|
|
}
|
|
// The start of the current character (c).
|
|
prevSrc=src;
|
|
} else if(src==limit) {
|
|
break;
|
|
}
|
|
|
|
src+=U16_LENGTH(c);
|
|
// The current character (c) at [prevSrc..src[ has a non-zero lead combining class.
|
|
// Check for proper order, and decompose locally if necessary.
|
|
if((prevFCD16&0xff)<=(fcd16>>8)) {
|
|
// proper order: prev tccc <= current lccc
|
|
if((fcd16&0xff)<=1) {
|
|
prevBoundary=src;
|
|
}
|
|
if(buffer!=nullptr && !buffer->appendZeroCC(c, errorCode)) {
|
|
break;
|
|
}
|
|
prevFCD16=fcd16;
|
|
continue;
|
|
} else if(buffer==nullptr) {
|
|
return prevBoundary; // quick check "no"
|
|
} else {
|
|
/*
|
|
* Back out the part of the source that we copied or appended
|
|
* already but is now going to be decomposed.
|
|
* prevSrc is set to after what was copied/appended.
|
|
*/
|
|
buffer->removeSuffix((int32_t)(prevSrc-prevBoundary));
|
|
/*
|
|
* Find the part of the source that needs to be decomposed,
|
|
* up to the next safe boundary.
|
|
*/
|
|
src=findNextFCDBoundary(src, limit);
|
|
/*
|
|
* The source text does not fulfill the conditions for FCD.
|
|
* Decompose and reorder a limited piece of the text.
|
|
*/
|
|
decomposeShort(prevBoundary, src, false, false, *buffer, errorCode);
|
|
if (U_FAILURE(errorCode)) {
|
|
break;
|
|
}
|
|
prevBoundary=src;
|
|
prevFCD16=0;
|
|
}
|
|
}
|
|
return src;
|
|
}
|
|
|
|
void Normalizer2Impl::makeFCDAndAppend(const char16_t *src, const char16_t *limit,
|
|
UBool doMakeFCD,
|
|
UnicodeString &safeMiddle,
|
|
ReorderingBuffer &buffer,
|
|
UErrorCode &errorCode) const {
|
|
if(!buffer.isEmpty()) {
|
|
const char16_t *firstBoundaryInSrc=findNextFCDBoundary(src, limit);
|
|
if(src!=firstBoundaryInSrc) {
|
|
const char16_t *lastBoundaryInDest=findPreviousFCDBoundary(buffer.getStart(),
|
|
buffer.getLimit());
|
|
int32_t destSuffixLength=(int32_t)(buffer.getLimit()-lastBoundaryInDest);
|
|
UnicodeString middle(lastBoundaryInDest, destSuffixLength);
|
|
buffer.removeSuffix(destSuffixLength);
|
|
safeMiddle=middle;
|
|
middle.append(src, (int32_t)(firstBoundaryInSrc-src));
|
|
const char16_t *middleStart=middle.getBuffer();
|
|
makeFCD(middleStart, middleStart+middle.length(), &buffer, errorCode);
|
|
if(U_FAILURE(errorCode)) {
|
|
return;
|
|
}
|
|
src=firstBoundaryInSrc;
|
|
}
|
|
}
|
|
if(doMakeFCD) {
|
|
makeFCD(src, limit, &buffer, errorCode);
|
|
} else {
|
|
if(limit==nullptr) { // appendZeroCC() needs limit!=nullptr
|
|
limit=u_strchr(src, 0);
|
|
}
|
|
buffer.appendZeroCC(src, limit, errorCode);
|
|
}
|
|
}
|
|
|
|
const char16_t *Normalizer2Impl::findPreviousFCDBoundary(const char16_t *start, const char16_t *p) const {
|
|
while(start<p) {
|
|
const char16_t *codePointLimit = p;
|
|
UChar32 c;
|
|
uint16_t norm16;
|
|
UCPTRIE_FAST_U16_PREV(normTrie, UCPTRIE_16, start, p, c, norm16);
|
|
if (c < minDecompNoCP || norm16HasDecompBoundaryAfter(norm16)) {
|
|
return codePointLimit;
|
|
}
|
|
if (norm16HasDecompBoundaryBefore(norm16)) {
|
|
return p;
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|
|
const char16_t *Normalizer2Impl::findNextFCDBoundary(const char16_t *p, const char16_t *limit) const {
|
|
while(p<limit) {
|
|
const char16_t *codePointStart=p;
|
|
UChar32 c;
|
|
uint16_t norm16;
|
|
UCPTRIE_FAST_U16_NEXT(normTrie, UCPTRIE_16, p, limit, c, norm16);
|
|
if (c < minLcccCP || norm16HasDecompBoundaryBefore(norm16)) {
|
|
return codePointStart;
|
|
}
|
|
if (norm16HasDecompBoundaryAfter(norm16)) {
|
|
return p;
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|
|
// CanonicalIterator data -------------------------------------------------- ***
|
|
|
|
CanonIterData::CanonIterData(UErrorCode &errorCode) :
|
|
mutableTrie(umutablecptrie_open(0, 0, &errorCode)), trie(nullptr),
|
|
canonStartSets(uprv_deleteUObject, nullptr, errorCode) {}
|
|
|
|
CanonIterData::~CanonIterData() {
|
|
umutablecptrie_close(mutableTrie);
|
|
ucptrie_close(trie);
|
|
}
|
|
|
|
void CanonIterData::addToStartSet(UChar32 origin, UChar32 decompLead, UErrorCode &errorCode) {
|
|
uint32_t canonValue = umutablecptrie_get(mutableTrie, decompLead);
|
|
if((canonValue&(CANON_HAS_SET|CANON_VALUE_MASK))==0 && origin!=0) {
|
|
// origin is the first character whose decomposition starts with
|
|
// the character for which we are setting the value.
|
|
umutablecptrie_set(mutableTrie, decompLead, canonValue|origin, &errorCode);
|
|
} else {
|
|
// origin is not the first character, or it is U+0000.
|
|
UnicodeSet *set;
|
|
if((canonValue&CANON_HAS_SET)==0) {
|
|
LocalPointer<UnicodeSet> lpSet(new UnicodeSet, errorCode);
|
|
set=lpSet.getAlias();
|
|
if(U_FAILURE(errorCode)) {
|
|
return;
|
|
}
|
|
UChar32 firstOrigin=(UChar32)(canonValue&CANON_VALUE_MASK);
|
|
canonValue=(canonValue&~CANON_VALUE_MASK)|CANON_HAS_SET|(uint32_t)canonStartSets.size();
|
|
umutablecptrie_set(mutableTrie, decompLead, canonValue, &errorCode);
|
|
canonStartSets.adoptElement(lpSet.orphan(), errorCode);
|
|
if (U_FAILURE(errorCode)) {
|
|
return;
|
|
}
|
|
if(firstOrigin!=0) {
|
|
set->add(firstOrigin);
|
|
}
|
|
} else {
|
|
set=(UnicodeSet *)canonStartSets[(int32_t)(canonValue&CANON_VALUE_MASK)];
|
|
}
|
|
set->add(origin);
|
|
}
|
|
}
|
|
|
|
// C++ class for friend access to private Normalizer2Impl members.
|
|
class InitCanonIterData {
|
|
public:
|
|
static void doInit(Normalizer2Impl *impl, UErrorCode &errorCode);
|
|
};
|
|
|
|
U_CDECL_BEGIN
|
|
|
|
// UInitOnce instantiation function for CanonIterData
|
|
static void U_CALLCONV
|
|
initCanonIterData(Normalizer2Impl *impl, UErrorCode &errorCode) {
|
|
InitCanonIterData::doInit(impl, errorCode);
|
|
}
|
|
|
|
U_CDECL_END
|
|
|
|
void InitCanonIterData::doInit(Normalizer2Impl *impl, UErrorCode &errorCode) {
|
|
U_ASSERT(impl->fCanonIterData == nullptr);
|
|
impl->fCanonIterData = new CanonIterData(errorCode);
|
|
if (impl->fCanonIterData == nullptr) {
|
|
errorCode=U_MEMORY_ALLOCATION_ERROR;
|
|
}
|
|
if (U_SUCCESS(errorCode)) {
|
|
UChar32 start = 0, end;
|
|
uint32_t value;
|
|
while ((end = ucptrie_getRange(impl->normTrie, start,
|
|
UCPMAP_RANGE_FIXED_LEAD_SURROGATES, Normalizer2Impl::INERT,
|
|
nullptr, nullptr, &value)) >= 0) {
|
|
// Call Normalizer2Impl::makeCanonIterDataFromNorm16() for a range of same-norm16 characters.
|
|
if (value != Normalizer2Impl::INERT) {
|
|
impl->makeCanonIterDataFromNorm16(start, end, value, *impl->fCanonIterData, errorCode);
|
|
}
|
|
start = end + 1;
|
|
}
|
|
#ifdef UCPTRIE_DEBUG
|
|
umutablecptrie_setName(impl->fCanonIterData->mutableTrie, "CanonIterData");
|
|
#endif
|
|
impl->fCanonIterData->trie = umutablecptrie_buildImmutable(
|
|
impl->fCanonIterData->mutableTrie, UCPTRIE_TYPE_SMALL, UCPTRIE_VALUE_BITS_32, &errorCode);
|
|
umutablecptrie_close(impl->fCanonIterData->mutableTrie);
|
|
impl->fCanonIterData->mutableTrie = nullptr;
|
|
}
|
|
if (U_FAILURE(errorCode)) {
|
|
delete impl->fCanonIterData;
|
|
impl->fCanonIterData = nullptr;
|
|
}
|
|
}
|
|
|
|
void Normalizer2Impl::makeCanonIterDataFromNorm16(UChar32 start, UChar32 end, const uint16_t norm16,
|
|
CanonIterData &newData,
|
|
UErrorCode &errorCode) const {
|
|
if(isInert(norm16) || (minYesNo<=norm16 && norm16<minNoNo)) {
|
|
// Inert, or 2-way mapping (including Hangul syllable).
|
|
// We do not write a canonStartSet for any yesNo character.
|
|
// Composites from 2-way mappings are added at runtime from the
|
|
// starter's compositions list, and the other characters in
|
|
// 2-way mappings get CANON_NOT_SEGMENT_STARTER set because they are
|
|
// "maybe" characters.
|
|
return;
|
|
}
|
|
for(UChar32 c=start; c<=end; ++c) {
|
|
uint32_t oldValue = umutablecptrie_get(newData.mutableTrie, c);
|
|
uint32_t newValue=oldValue;
|
|
if(isMaybeOrNonZeroCC(norm16)) {
|
|
// not a segment starter if it occurs in a decomposition or has cc!=0
|
|
newValue|=CANON_NOT_SEGMENT_STARTER;
|
|
if(norm16<MIN_NORMAL_MAYBE_YES) {
|
|
newValue|=CANON_HAS_COMPOSITIONS;
|
|
}
|
|
} else if(norm16<minYesNo) {
|
|
newValue|=CANON_HAS_COMPOSITIONS;
|
|
} else {
|
|
// c has a one-way decomposition
|
|
UChar32 c2=c;
|
|
// Do not modify the whole-range norm16 value.
|
|
uint16_t norm16_2=norm16;
|
|
if (isDecompNoAlgorithmic(norm16_2)) {
|
|
// Maps to an isCompYesAndZeroCC.
|
|
c2 = mapAlgorithmic(c2, norm16_2);
|
|
norm16_2 = getRawNorm16(c2);
|
|
// No compatibility mappings for the CanonicalIterator.
|
|
U_ASSERT(!(isHangulLV(norm16_2) || isHangulLVT(norm16_2)));
|
|
}
|
|
if (norm16_2 > minYesNo) {
|
|
// c decomposes, get everything from the variable-length extra data
|
|
const uint16_t *mapping=getMapping(norm16_2);
|
|
uint16_t firstUnit=*mapping;
|
|
int32_t length=firstUnit&MAPPING_LENGTH_MASK;
|
|
if((firstUnit&MAPPING_HAS_CCC_LCCC_WORD)!=0) {
|
|
if(c==c2 && (*(mapping-1)&0xff)!=0) {
|
|
newValue|=CANON_NOT_SEGMENT_STARTER; // original c has cc!=0
|
|
}
|
|
}
|
|
// Skip empty mappings (no characters in the decomposition).
|
|
if(length!=0) {
|
|
++mapping; // skip over the firstUnit
|
|
// add c to first code point's start set
|
|
int32_t i=0;
|
|
U16_NEXT_UNSAFE(mapping, i, c2);
|
|
newData.addToStartSet(c, c2, errorCode);
|
|
// Set CANON_NOT_SEGMENT_STARTER for each remaining code point of a
|
|
// one-way mapping. A 2-way mapping is possible here after
|
|
// intermediate algorithmic mapping.
|
|
if(norm16_2>=minNoNo) {
|
|
while(i<length) {
|
|
U16_NEXT_UNSAFE(mapping, i, c2);
|
|
uint32_t c2Value = umutablecptrie_get(newData.mutableTrie, c2);
|
|
if((c2Value&CANON_NOT_SEGMENT_STARTER)==0) {
|
|
umutablecptrie_set(newData.mutableTrie, c2,
|
|
c2Value|CANON_NOT_SEGMENT_STARTER, &errorCode);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// c decomposed to c2 algorithmically; c has cc==0
|
|
newData.addToStartSet(c, c2, errorCode);
|
|
}
|
|
}
|
|
if(newValue!=oldValue) {
|
|
umutablecptrie_set(newData.mutableTrie, c, newValue, &errorCode);
|
|
}
|
|
}
|
|
}
|
|
|
|
UBool Normalizer2Impl::ensureCanonIterData(UErrorCode &errorCode) const {
|
|
// Logically const: Synchronized instantiation.
|
|
Normalizer2Impl *me=const_cast<Normalizer2Impl *>(this);
|
|
umtx_initOnce(me->fCanonIterDataInitOnce, &initCanonIterData, me, errorCode);
|
|
return U_SUCCESS(errorCode);
|
|
}
|
|
|
|
int32_t Normalizer2Impl::getCanonValue(UChar32 c) const {
|
|
return (int32_t)ucptrie_get(fCanonIterData->trie, c);
|
|
}
|
|
|
|
const UnicodeSet &Normalizer2Impl::getCanonStartSet(int32_t n) const {
|
|
return *(const UnicodeSet *)fCanonIterData->canonStartSets[n];
|
|
}
|
|
|
|
UBool Normalizer2Impl::isCanonSegmentStarter(UChar32 c) const {
|
|
return getCanonValue(c)>=0;
|
|
}
|
|
|
|
UBool Normalizer2Impl::getCanonStartSet(UChar32 c, UnicodeSet &set) const {
|
|
int32_t canonValue=getCanonValue(c)&~CANON_NOT_SEGMENT_STARTER;
|
|
if(canonValue==0) {
|
|
return false;
|
|
}
|
|
set.clear();
|
|
int32_t value=canonValue&CANON_VALUE_MASK;
|
|
if((canonValue&CANON_HAS_SET)!=0) {
|
|
set.addAll(getCanonStartSet(value));
|
|
} else if(value!=0) {
|
|
set.add(value);
|
|
}
|
|
if((canonValue&CANON_HAS_COMPOSITIONS)!=0) {
|
|
uint16_t norm16=getRawNorm16(c);
|
|
if(norm16==JAMO_L) {
|
|
UChar32 syllable=
|
|
(UChar32)(Hangul::HANGUL_BASE+(c-Hangul::JAMO_L_BASE)*Hangul::JAMO_VT_COUNT);
|
|
set.add(syllable, syllable+Hangul::JAMO_VT_COUNT-1);
|
|
} else {
|
|
addComposites(getCompositionsList(norm16), set);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
U_NAMESPACE_END
|
|
|
|
// Normalizer2 data swapping ----------------------------------------------- ***
|
|
|
|
U_NAMESPACE_USE
|
|
|
|
U_CAPI int32_t U_EXPORT2
|
|
unorm2_swap(const UDataSwapper *ds,
|
|
const void *inData, int32_t length, void *outData,
|
|
UErrorCode *pErrorCode) {
|
|
const UDataInfo *pInfo;
|
|
int32_t headerSize;
|
|
|
|
const uint8_t *inBytes;
|
|
uint8_t *outBytes;
|
|
|
|
const int32_t *inIndexes;
|
|
int32_t indexes[Normalizer2Impl::IX_TOTAL_SIZE+1];
|
|
|
|
int32_t i, offset, nextOffset, size;
|
|
|
|
/* udata_swapDataHeader checks the arguments */
|
|
headerSize=udata_swapDataHeader(ds, inData, length, outData, pErrorCode);
|
|
if(pErrorCode==nullptr || U_FAILURE(*pErrorCode)) {
|
|
return 0;
|
|
}
|
|
|
|
/* check data format and format version */
|
|
pInfo=(const UDataInfo *)((const char *)inData+4);
|
|
uint8_t formatVersion0=pInfo->formatVersion[0];
|
|
if(!(
|
|
pInfo->dataFormat[0]==0x4e && /* dataFormat="Nrm2" */
|
|
pInfo->dataFormat[1]==0x72 &&
|
|
pInfo->dataFormat[2]==0x6d &&
|
|
pInfo->dataFormat[3]==0x32 &&
|
|
(1<=formatVersion0 && formatVersion0<=4)
|
|
)) {
|
|
udata_printError(ds, "unorm2_swap(): data format %02x.%02x.%02x.%02x (format version %02x) is not recognized as Normalizer2 data\n",
|
|
pInfo->dataFormat[0], pInfo->dataFormat[1],
|
|
pInfo->dataFormat[2], pInfo->dataFormat[3],
|
|
pInfo->formatVersion[0]);
|
|
*pErrorCode=U_UNSUPPORTED_ERROR;
|
|
return 0;
|
|
}
|
|
|
|
inBytes=(const uint8_t *)inData+headerSize;
|
|
outBytes=(outData == nullptr) ? nullptr : (uint8_t *)outData+headerSize;
|
|
|
|
inIndexes=(const int32_t *)inBytes;
|
|
int32_t minIndexesLength;
|
|
if(formatVersion0==1) {
|
|
minIndexesLength=Normalizer2Impl::IX_MIN_MAYBE_YES+1;
|
|
} else if(formatVersion0==2) {
|
|
minIndexesLength=Normalizer2Impl::IX_MIN_YES_NO_MAPPINGS_ONLY+1;
|
|
} else {
|
|
minIndexesLength=Normalizer2Impl::IX_MIN_LCCC_CP+1;
|
|
}
|
|
|
|
if(length>=0) {
|
|
length-=headerSize;
|
|
if(length<minIndexesLength*4) {
|
|
udata_printError(ds, "unorm2_swap(): too few bytes (%d after header) for Normalizer2 data\n",
|
|
length);
|
|
*pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* read the first few indexes */
|
|
for(i=0; i<UPRV_LENGTHOF(indexes); ++i) {
|
|
indexes[i]=udata_readInt32(ds, inIndexes[i]);
|
|
}
|
|
|
|
/* get the total length of the data */
|
|
size=indexes[Normalizer2Impl::IX_TOTAL_SIZE];
|
|
|
|
if(length>=0) {
|
|
if(length<size) {
|
|
udata_printError(ds, "unorm2_swap(): too few bytes (%d after header) for all of Normalizer2 data\n",
|
|
length);
|
|
*pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
|
|
return 0;
|
|
}
|
|
|
|
/* copy the data for inaccessible bytes */
|
|
if(inBytes!=outBytes) {
|
|
uprv_memcpy(outBytes, inBytes, size);
|
|
}
|
|
|
|
offset=0;
|
|
|
|
/* swap the int32_t indexes[] */
|
|
nextOffset=indexes[Normalizer2Impl::IX_NORM_TRIE_OFFSET];
|
|
ds->swapArray32(ds, inBytes, nextOffset-offset, outBytes, pErrorCode);
|
|
offset=nextOffset;
|
|
|
|
/* swap the trie */
|
|
nextOffset=indexes[Normalizer2Impl::IX_EXTRA_DATA_OFFSET];
|
|
utrie_swapAnyVersion(ds, inBytes+offset, nextOffset-offset, outBytes+offset, pErrorCode);
|
|
offset=nextOffset;
|
|
|
|
/* swap the uint16_t extraData[] */
|
|
nextOffset=indexes[Normalizer2Impl::IX_SMALL_FCD_OFFSET];
|
|
ds->swapArray16(ds, inBytes+offset, nextOffset-offset, outBytes+offset, pErrorCode);
|
|
offset=nextOffset;
|
|
|
|
/* no need to swap the uint8_t smallFCD[] (new in formatVersion 2) */
|
|
nextOffset=indexes[Normalizer2Impl::IX_SMALL_FCD_OFFSET+1];
|
|
offset=nextOffset;
|
|
|
|
U_ASSERT(offset==size);
|
|
}
|
|
|
|
return headerSize+size;
|
|
}
|
|
|
|
#endif // !UCONFIG_NO_NORMALIZATION
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