989 lines
41 KiB
C++
989 lines
41 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.h
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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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#ifndef __NORMALIZER2IMPL_H__
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#define __NORMALIZER2IMPL_H__
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_NORMALIZATION
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#include "unicode/normalizer2.h"
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#include "unicode/ucptrie.h"
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#include "unicode/unistr.h"
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#include "unicode/unorm.h"
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#include "unicode/utf.h"
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#include "unicode/utf16.h"
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#include "mutex.h"
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#include "udataswp.h"
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#include "uset_imp.h"
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// When the nfc.nrm data is *not* hardcoded into the common library
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// (with this constant set to 0),
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// then it needs to be built into the data package:
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// Add nfc.nrm to icu4c/source/data/Makefile.in DAT_FILES_SHORT
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#define NORM2_HARDCODE_NFC_DATA 1
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U_NAMESPACE_BEGIN
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struct CanonIterData;
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class ByteSink;
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class Edits;
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class InitCanonIterData;
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class LcccContext;
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class U_COMMON_API Hangul {
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public:
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/* Korean Hangul and Jamo constants */
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enum {
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JAMO_L_BASE=0x1100, /* "lead" jamo */
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JAMO_L_END=0x1112,
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JAMO_V_BASE=0x1161, /* "vowel" jamo */
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JAMO_V_END=0x1175,
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JAMO_T_BASE=0x11a7, /* "trail" jamo */
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JAMO_T_END=0x11c2,
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HANGUL_BASE=0xac00,
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HANGUL_END=0xd7a3,
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JAMO_L_COUNT=19,
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JAMO_V_COUNT=21,
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JAMO_T_COUNT=28,
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JAMO_VT_COUNT=JAMO_V_COUNT*JAMO_T_COUNT,
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HANGUL_COUNT=JAMO_L_COUNT*JAMO_V_COUNT*JAMO_T_COUNT,
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HANGUL_LIMIT=HANGUL_BASE+HANGUL_COUNT
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};
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static inline UBool isHangul(UChar32 c) {
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return HANGUL_BASE<=c && c<HANGUL_LIMIT;
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}
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static inline UBool
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isHangulLV(UChar32 c) {
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c-=HANGUL_BASE;
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return 0<=c && c<HANGUL_COUNT && c%JAMO_T_COUNT==0;
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}
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static inline UBool isJamoL(UChar32 c) {
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return (uint32_t)(c-JAMO_L_BASE)<JAMO_L_COUNT;
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}
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static inline UBool isJamoV(UChar32 c) {
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return (uint32_t)(c-JAMO_V_BASE)<JAMO_V_COUNT;
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}
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static inline UBool isJamoT(UChar32 c) {
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int32_t t=c-JAMO_T_BASE;
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return 0<t && t<JAMO_T_COUNT; // not JAMO_T_BASE itself
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}
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static UBool isJamo(UChar32 c) {
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return JAMO_L_BASE<=c && c<=JAMO_T_END &&
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(c<=JAMO_L_END || (JAMO_V_BASE<=c && c<=JAMO_V_END) || JAMO_T_BASE<c);
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}
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/**
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* Decomposes c, which must be a Hangul syllable, into buffer
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* and returns the length of the decomposition (2 or 3).
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*/
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static inline int32_t decompose(UChar32 c, char16_t buffer[3]) {
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c-=HANGUL_BASE;
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UChar32 c2=c%JAMO_T_COUNT;
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c/=JAMO_T_COUNT;
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buffer[0]=(char16_t)(JAMO_L_BASE+c/JAMO_V_COUNT);
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buffer[1]=(char16_t)(JAMO_V_BASE+c%JAMO_V_COUNT);
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if(c2==0) {
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return 2;
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} else {
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buffer[2]=(char16_t)(JAMO_T_BASE+c2);
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return 3;
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}
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}
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/**
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* Decomposes c, which must be a Hangul syllable, into buffer.
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* This is the raw, not recursive, decomposition. Its length is always 2.
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*/
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static inline void getRawDecomposition(UChar32 c, char16_t buffer[2]) {
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UChar32 orig=c;
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c-=HANGUL_BASE;
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UChar32 c2=c%JAMO_T_COUNT;
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if(c2==0) {
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c/=JAMO_T_COUNT;
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buffer[0]=(char16_t)(JAMO_L_BASE+c/JAMO_V_COUNT);
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buffer[1]=(char16_t)(JAMO_V_BASE+c%JAMO_V_COUNT);
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} else {
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buffer[0]=(char16_t)(orig-c2); // LV syllable
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buffer[1]=(char16_t)(JAMO_T_BASE+c2);
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}
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}
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private:
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Hangul() = delete; // no instantiation
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};
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class Normalizer2Impl;
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class U_COMMON_API ReorderingBuffer : public UMemory {
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public:
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/** Constructs only; init() should be called. */
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ReorderingBuffer(const Normalizer2Impl &ni, UnicodeString &dest) :
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impl(ni), str(dest),
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start(NULL), reorderStart(NULL), limit(NULL),
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remainingCapacity(0), lastCC(0) {}
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/** Constructs, removes the string contents, and initializes for a small initial capacity. */
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ReorderingBuffer(const Normalizer2Impl &ni, UnicodeString &dest, UErrorCode &errorCode);
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~ReorderingBuffer() {
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if(start!=NULL) {
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str.releaseBuffer((int32_t)(limit-start));
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}
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}
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UBool init(int32_t destCapacity, UErrorCode &errorCode);
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UBool isEmpty() const { return start==limit; }
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int32_t length() const { return (int32_t)(limit-start); }
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char16_t *getStart() { return start; }
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char16_t *getLimit() { return limit; }
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uint8_t getLastCC() const { return lastCC; }
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UBool equals(const char16_t *start, const char16_t *limit) const;
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UBool equals(const uint8_t *otherStart, const uint8_t *otherLimit) const;
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UBool append(UChar32 c, uint8_t cc, UErrorCode &errorCode) {
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return (c<=0xffff) ?
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appendBMP((char16_t)c, cc, errorCode) :
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appendSupplementary(c, cc, errorCode);
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}
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UBool 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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UBool appendBMP(char16_t c, uint8_t cc, UErrorCode &errorCode) {
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if(remainingCapacity==0 && !resize(1, 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++=c;
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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;
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return true;
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}
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UBool appendZeroCC(UChar32 c, UErrorCode &errorCode);
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UBool appendZeroCC(const char16_t *s, const char16_t *sLimit, UErrorCode &errorCode);
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void remove();
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void removeSuffix(int32_t suffixLength);
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void setReorderingLimit(char16_t *newLimit) {
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remainingCapacity+=(int32_t)(limit-newLimit);
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reorderStart=limit=newLimit;
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lastCC=0;
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}
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void copyReorderableSuffixTo(UnicodeString &s) const {
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s.setTo(ConstChar16Ptr(reorderStart), (int32_t)(limit-reorderStart));
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}
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private:
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/*
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* TODO: Revisit whether it makes sense to track reorderStart.
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* It is set to after the last known character with cc<=1,
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* which stops previousCC() before it reads that character and looks up its cc.
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* previousCC() is normally only called from insert().
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* In other words, reorderStart speeds up the insertion of a combining mark
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* into a multi-combining mark sequence where it does not belong at the end.
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* This might not be worth the trouble.
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* On the other hand, it's not a huge amount of trouble.
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*
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* We probably need it for UNORM_SIMPLE_APPEND.
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*/
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UBool appendSupplementary(UChar32 c, uint8_t cc, UErrorCode &errorCode);
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void insert(UChar32 c, uint8_t cc);
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static void writeCodePoint(char16_t *p, UChar32 c) {
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if(c<=0xffff) {
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*p=(char16_t)c;
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} else {
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p[0]=U16_LEAD(c);
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p[1]=U16_TRAIL(c);
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}
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}
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UBool resize(int32_t appendLength, UErrorCode &errorCode);
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const Normalizer2Impl &impl;
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UnicodeString &str;
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char16_t *start, *reorderStart, *limit;
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int32_t remainingCapacity;
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uint8_t lastCC;
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// private backward iterator
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void setIterator() { codePointStart=limit; }
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void skipPrevious(); // Requires start<codePointStart.
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uint8_t previousCC(); // Returns 0 if there is no previous character.
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char16_t *codePointStart, *codePointLimit;
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};
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/**
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* Low-level implementation of the Unicode Normalization Algorithm.
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* For the data structure and details see the documentation at the end of
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* this normalizer2impl.h and in the design doc at
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* https://icu.unicode.org/design/normalization/custom
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*/
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class U_COMMON_API Normalizer2Impl : public UObject {
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public:
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Normalizer2Impl() : normTrie(NULL), fCanonIterData(NULL) { }
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virtual ~Normalizer2Impl();
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void init(const int32_t *inIndexes, const UCPTrie *inTrie,
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const uint16_t *inExtraData, const uint8_t *inSmallFCD);
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void addLcccChars(UnicodeSet &set) const;
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void addPropertyStarts(const USetAdder *sa, UErrorCode &errorCode) const;
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void addCanonIterPropertyStarts(const USetAdder *sa, UErrorCode &errorCode) const;
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// low-level properties ------------------------------------------------ ***
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UBool ensureCanonIterData(UErrorCode &errorCode) const;
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// The trie stores values for lead surrogate code *units*.
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// Surrogate code *points* are inert.
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uint16_t getNorm16(UChar32 c) const {
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return U_IS_LEAD(c) ?
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static_cast<uint16_t>(INERT) :
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UCPTRIE_FAST_GET(normTrie, UCPTRIE_16, c);
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}
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uint16_t getRawNorm16(UChar32 c) const { return UCPTRIE_FAST_GET(normTrie, UCPTRIE_16, c); }
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UNormalizationCheckResult getCompQuickCheck(uint16_t norm16) const {
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if(norm16<minNoNo || MIN_YES_YES_WITH_CC<=norm16) {
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return UNORM_YES;
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} else if(minMaybeYes<=norm16) {
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return UNORM_MAYBE;
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} else {
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return UNORM_NO;
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}
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}
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UBool isAlgorithmicNoNo(uint16_t norm16) const { return limitNoNo<=norm16 && norm16<minMaybeYes; }
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UBool isCompNo(uint16_t norm16) const { return minNoNo<=norm16 && norm16<minMaybeYes; }
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UBool isDecompYes(uint16_t norm16) const { return norm16<minYesNo || minMaybeYes<=norm16; }
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uint8_t getCC(uint16_t norm16) const {
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if(norm16>=MIN_NORMAL_MAYBE_YES) {
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return getCCFromNormalYesOrMaybe(norm16);
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}
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if(norm16<minNoNo || limitNoNo<=norm16) {
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return 0;
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}
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return getCCFromNoNo(norm16);
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}
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static uint8_t getCCFromNormalYesOrMaybe(uint16_t norm16) {
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return (uint8_t)(norm16 >> OFFSET_SHIFT);
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}
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static uint8_t getCCFromYesOrMaybe(uint16_t norm16) {
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return norm16>=MIN_NORMAL_MAYBE_YES ? getCCFromNormalYesOrMaybe(norm16) : 0;
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}
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uint8_t getCCFromYesOrMaybeCP(UChar32 c) const {
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if (c < minCompNoMaybeCP) { return 0; }
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return getCCFromYesOrMaybe(getNorm16(c));
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}
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/**
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* Returns the FCD data for code point c.
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* @param c A Unicode code point.
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* @return The lccc(c) in bits 15..8 and tccc(c) in bits 7..0.
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*/
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uint16_t getFCD16(UChar32 c) const {
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if(c<minDecompNoCP) {
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return 0;
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} else if(c<=0xffff) {
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if(!singleLeadMightHaveNonZeroFCD16(c)) { return 0; }
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}
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return getFCD16FromNormData(c);
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}
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/**
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* Returns the FCD data for the next code point (post-increment).
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* Might skip only a lead surrogate rather than the whole surrogate pair if none of
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* the supplementary code points associated with the lead surrogate have non-zero FCD data.
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* @param s A valid pointer into a string. Requires s!=limit.
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* @param limit The end of the string, or NULL.
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* @return The lccc(c) in bits 15..8 and tccc(c) in bits 7..0.
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*/
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uint16_t nextFCD16(const char16_t *&s, const char16_t *limit) const {
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UChar32 c=*s++;
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if(c<minDecompNoCP || !singleLeadMightHaveNonZeroFCD16(c)) {
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return 0;
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}
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char16_t c2;
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if(U16_IS_LEAD(c) && s!=limit && U16_IS_TRAIL(c2=*s)) {
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c=U16_GET_SUPPLEMENTARY(c, c2);
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++s;
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}
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return getFCD16FromNormData(c);
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}
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/**
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* Returns the FCD data for the previous code point (pre-decrement).
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* @param start The start of the string.
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* @param s A valid pointer into a string. Requires start<s.
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* @return The lccc(c) in bits 15..8 and tccc(c) in bits 7..0.
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*/
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uint16_t previousFCD16(const char16_t *start, const char16_t *&s) const {
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UChar32 c=*--s;
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if(c<minDecompNoCP) {
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return 0;
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}
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if(!U16_IS_TRAIL(c)) {
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if(!singleLeadMightHaveNonZeroFCD16(c)) {
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return 0;
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}
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} else {
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char16_t c2;
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if(start<s && U16_IS_LEAD(c2=*(s-1))) {
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c=U16_GET_SUPPLEMENTARY(c2, c);
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--s;
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}
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}
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return getFCD16FromNormData(c);
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}
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/** Returns true if the single-or-lead code unit c might have non-zero FCD data. */
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UBool singleLeadMightHaveNonZeroFCD16(UChar32 lead) const {
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// 0<=lead<=0xffff
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uint8_t bits=smallFCD[lead>>8];
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if(bits==0) { return false; }
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return (UBool)((bits>>((lead>>5)&7))&1);
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}
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/** Returns the FCD value from the regular normalization data. */
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uint16_t getFCD16FromNormData(UChar32 c) const;
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/**
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* Gets the decomposition for one code point.
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* @param c code point
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* @param buffer out-only buffer for algorithmic decompositions
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* @param length out-only, takes the length of the decomposition, if any
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* @return pointer to the decomposition, or NULL if none
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*/
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const char16_t *getDecomposition(UChar32 c, char16_t buffer[4], int32_t &length) const;
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/**
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* Gets the raw decomposition for one code point.
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* @param c code point
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* @param buffer out-only buffer for algorithmic decompositions
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* @param length out-only, takes the length of the decomposition, if any
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* @return pointer to the decomposition, or NULL if none
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*/
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const char16_t *getRawDecomposition(UChar32 c, char16_t buffer[30], int32_t &length) const;
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UChar32 composePair(UChar32 a, UChar32 b) const;
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UBool isCanonSegmentStarter(UChar32 c) const;
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UBool getCanonStartSet(UChar32 c, UnicodeSet &set) const;
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enum {
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// Fixed norm16 values.
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MIN_YES_YES_WITH_CC=0xfe02,
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JAMO_VT=0xfe00,
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MIN_NORMAL_MAYBE_YES=0xfc00,
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JAMO_L=2, // offset=1 hasCompBoundaryAfter=false
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INERT=1, // offset=0 hasCompBoundaryAfter=true
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// norm16 bit 0 is comp-boundary-after.
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HAS_COMP_BOUNDARY_AFTER=1,
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OFFSET_SHIFT=1,
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// For algorithmic one-way mappings, norm16 bits 2..1 indicate the
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// tccc (0, 1, >1) for quick FCC boundary-after tests.
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DELTA_TCCC_0=0,
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DELTA_TCCC_1=2,
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DELTA_TCCC_GT_1=4,
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DELTA_TCCC_MASK=6,
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DELTA_SHIFT=3,
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MAX_DELTA=0x40
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};
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enum {
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// Byte offsets from the start of the data, after the generic header.
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IX_NORM_TRIE_OFFSET,
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IX_EXTRA_DATA_OFFSET,
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IX_SMALL_FCD_OFFSET,
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IX_RESERVED3_OFFSET,
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IX_RESERVED4_OFFSET,
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IX_RESERVED5_OFFSET,
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IX_RESERVED6_OFFSET,
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IX_TOTAL_SIZE,
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// Code point thresholds for quick check codes.
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IX_MIN_DECOMP_NO_CP,
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IX_MIN_COMP_NO_MAYBE_CP,
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// Norm16 value thresholds for quick check combinations and types of extra data.
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/** Mappings & compositions in [minYesNo..minYesNoMappingsOnly[. */
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IX_MIN_YES_NO,
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/** Mappings are comp-normalized. */
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IX_MIN_NO_NO,
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IX_LIMIT_NO_NO,
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IX_MIN_MAYBE_YES,
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/** Mappings only in [minYesNoMappingsOnly..minNoNo[. */
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IX_MIN_YES_NO_MAPPINGS_ONLY,
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/** Mappings are not comp-normalized but have a comp boundary before. */
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IX_MIN_NO_NO_COMP_BOUNDARY_BEFORE,
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/** Mappings do not have a comp boundary before. */
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IX_MIN_NO_NO_COMP_NO_MAYBE_CC,
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/** Mappings to the empty string. */
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IX_MIN_NO_NO_EMPTY,
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IX_MIN_LCCC_CP,
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IX_RESERVED19,
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IX_COUNT
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};
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enum {
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MAPPING_HAS_CCC_LCCC_WORD=0x80,
|
|
MAPPING_HAS_RAW_MAPPING=0x40,
|
|
// unused bit 0x20,
|
|
MAPPING_LENGTH_MASK=0x1f
|
|
};
|
|
|
|
enum {
|
|
COMP_1_LAST_TUPLE=0x8000,
|
|
COMP_1_TRIPLE=1,
|
|
COMP_1_TRAIL_LIMIT=0x3400,
|
|
COMP_1_TRAIL_MASK=0x7ffe,
|
|
COMP_1_TRAIL_SHIFT=9, // 10-1 for the "triple" bit
|
|
COMP_2_TRAIL_SHIFT=6,
|
|
COMP_2_TRAIL_MASK=0xffc0
|
|
};
|
|
|
|
// higher-level functionality ------------------------------------------ ***
|
|
|
|
// NFD without an NFD Normalizer2 instance.
|
|
UnicodeString &decompose(const UnicodeString &src, UnicodeString &dest,
|
|
UErrorCode &errorCode) const;
|
|
/**
|
|
* Decomposes [src, limit[ and writes the result to dest.
|
|
* limit can be NULL if src is NUL-terminated.
|
|
* destLengthEstimate is the initial dest buffer capacity and can be -1.
|
|
*/
|
|
void decompose(const char16_t *src, const char16_t *limit,
|
|
UnicodeString &dest, int32_t destLengthEstimate,
|
|
UErrorCode &errorCode) const;
|
|
|
|
const char16_t *decompose(const char16_t *src, const char16_t *limit,
|
|
ReorderingBuffer *buffer, UErrorCode &errorCode) const;
|
|
void decomposeAndAppend(const char16_t *src, const char16_t *limit,
|
|
UBool doDecompose,
|
|
UnicodeString &safeMiddle,
|
|
ReorderingBuffer &buffer,
|
|
UErrorCode &errorCode) const;
|
|
|
|
/** sink==nullptr: isNormalized()/spanQuickCheckYes() */
|
|
const uint8_t *decomposeUTF8(uint32_t options,
|
|
const uint8_t *src, const uint8_t *limit,
|
|
ByteSink *sink, Edits *edits, UErrorCode &errorCode) const;
|
|
|
|
UBool compose(const char16_t *src, const char16_t *limit,
|
|
UBool onlyContiguous,
|
|
UBool doCompose,
|
|
ReorderingBuffer &buffer,
|
|
UErrorCode &errorCode) const;
|
|
const char16_t *composeQuickCheck(const char16_t *src, const char16_t *limit,
|
|
UBool onlyContiguous,
|
|
UNormalizationCheckResult *pQCResult) const;
|
|
void composeAndAppend(const char16_t *src, const char16_t *limit,
|
|
UBool doCompose,
|
|
UBool onlyContiguous,
|
|
UnicodeString &safeMiddle,
|
|
ReorderingBuffer &buffer,
|
|
UErrorCode &errorCode) const;
|
|
|
|
/** sink==nullptr: isNormalized() */
|
|
UBool composeUTF8(uint32_t options, UBool onlyContiguous,
|
|
const uint8_t *src, const uint8_t *limit,
|
|
ByteSink *sink, icu::Edits *edits, UErrorCode &errorCode) const;
|
|
|
|
const char16_t *makeFCD(const char16_t *src, const char16_t *limit,
|
|
ReorderingBuffer *buffer, UErrorCode &errorCode) const;
|
|
void makeFCDAndAppend(const char16_t *src, const char16_t *limit,
|
|
UBool doMakeFCD,
|
|
UnicodeString &safeMiddle,
|
|
ReorderingBuffer &buffer,
|
|
UErrorCode &errorCode) const;
|
|
|
|
UBool hasDecompBoundaryBefore(UChar32 c) const;
|
|
UBool norm16HasDecompBoundaryBefore(uint16_t norm16) const;
|
|
UBool hasDecompBoundaryAfter(UChar32 c) const;
|
|
UBool norm16HasDecompBoundaryAfter(uint16_t norm16) const;
|
|
UBool isDecompInert(UChar32 c) const { return isDecompYesAndZeroCC(getNorm16(c)); }
|
|
|
|
UBool hasCompBoundaryBefore(UChar32 c) const {
|
|
return c<minCompNoMaybeCP || norm16HasCompBoundaryBefore(getNorm16(c));
|
|
}
|
|
UBool hasCompBoundaryAfter(UChar32 c, UBool onlyContiguous) const {
|
|
return norm16HasCompBoundaryAfter(getNorm16(c), onlyContiguous);
|
|
}
|
|
UBool isCompInert(UChar32 c, UBool onlyContiguous) const {
|
|
uint16_t norm16=getNorm16(c);
|
|
return isCompYesAndZeroCC(norm16) &&
|
|
(norm16 & HAS_COMP_BOUNDARY_AFTER) != 0 &&
|
|
(!onlyContiguous || isInert(norm16) || *getMapping(norm16) <= 0x1ff);
|
|
}
|
|
|
|
UBool hasFCDBoundaryBefore(UChar32 c) const { return hasDecompBoundaryBefore(c); }
|
|
UBool hasFCDBoundaryAfter(UChar32 c) const { return hasDecompBoundaryAfter(c); }
|
|
UBool isFCDInert(UChar32 c) const { return getFCD16(c)<=1; }
|
|
private:
|
|
friend class InitCanonIterData;
|
|
friend class LcccContext;
|
|
|
|
UBool isMaybe(uint16_t norm16) const { return minMaybeYes<=norm16 && norm16<=JAMO_VT; }
|
|
UBool isMaybeOrNonZeroCC(uint16_t norm16) const { return norm16>=minMaybeYes; }
|
|
static UBool isInert(uint16_t norm16) { return norm16==INERT; }
|
|
static UBool isJamoL(uint16_t norm16) { return norm16==JAMO_L; }
|
|
static UBool isJamoVT(uint16_t norm16) { return norm16==JAMO_VT; }
|
|
uint16_t hangulLVT() const { return minYesNoMappingsOnly|HAS_COMP_BOUNDARY_AFTER; }
|
|
UBool isHangulLV(uint16_t norm16) const { return norm16==minYesNo; }
|
|
UBool isHangulLVT(uint16_t norm16) const {
|
|
return norm16==hangulLVT();
|
|
}
|
|
UBool isCompYesAndZeroCC(uint16_t norm16) const { return norm16<minNoNo; }
|
|
// UBool isCompYes(uint16_t norm16) const {
|
|
// return norm16>=MIN_YES_YES_WITH_CC || norm16<minNoNo;
|
|
// }
|
|
// UBool isCompYesOrMaybe(uint16_t norm16) const {
|
|
// return norm16<minNoNo || minMaybeYes<=norm16;
|
|
// }
|
|
// UBool hasZeroCCFromDecompYes(uint16_t norm16) const {
|
|
// return norm16<=MIN_NORMAL_MAYBE_YES || norm16==JAMO_VT;
|
|
// }
|
|
UBool isDecompYesAndZeroCC(uint16_t norm16) const {
|
|
return norm16<minYesNo ||
|
|
norm16==JAMO_VT ||
|
|
(minMaybeYes<=norm16 && norm16<=MIN_NORMAL_MAYBE_YES);
|
|
}
|
|
/**
|
|
* A little faster and simpler than isDecompYesAndZeroCC() but does not include
|
|
* the MaybeYes which combine-forward and have ccc=0.
|
|
* (Standard Unicode 10 normalization does not have such characters.)
|
|
*/
|
|
UBool isMostDecompYesAndZeroCC(uint16_t norm16) const {
|
|
return norm16<minYesNo || norm16==MIN_NORMAL_MAYBE_YES || norm16==JAMO_VT;
|
|
}
|
|
UBool isDecompNoAlgorithmic(uint16_t norm16) const { return norm16>=limitNoNo; }
|
|
|
|
// For use with isCompYes().
|
|
// Perhaps the compiler can combine the two tests for MIN_YES_YES_WITH_CC.
|
|
// static uint8_t getCCFromYes(uint16_t norm16) {
|
|
// return norm16>=MIN_YES_YES_WITH_CC ? getCCFromNormalYesOrMaybe(norm16) : 0;
|
|
// }
|
|
uint8_t getCCFromNoNo(uint16_t norm16) const {
|
|
const uint16_t *mapping=getMapping(norm16);
|
|
if(*mapping&MAPPING_HAS_CCC_LCCC_WORD) {
|
|
return (uint8_t)*(mapping-1);
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
// requires that the [cpStart..cpLimit[ character passes isCompYesAndZeroCC()
|
|
uint8_t getTrailCCFromCompYesAndZeroCC(uint16_t norm16) const {
|
|
if(norm16<=minYesNo) {
|
|
return 0; // yesYes and Hangul LV have ccc=tccc=0
|
|
} else {
|
|
// For Hangul LVT we harmlessly fetch a firstUnit with tccc=0 here.
|
|
return (uint8_t)(*getMapping(norm16)>>8); // tccc from yesNo
|
|
}
|
|
}
|
|
uint8_t getPreviousTrailCC(const char16_t *start, const char16_t *p) const;
|
|
uint8_t getPreviousTrailCC(const uint8_t *start, const uint8_t *p) const;
|
|
|
|
// Requires algorithmic-NoNo.
|
|
UChar32 mapAlgorithmic(UChar32 c, uint16_t norm16) const {
|
|
return c+(norm16>>DELTA_SHIFT)-centerNoNoDelta;
|
|
}
|
|
UChar32 getAlgorithmicDelta(uint16_t norm16) const {
|
|
return (norm16>>DELTA_SHIFT)-centerNoNoDelta;
|
|
}
|
|
|
|
// Requires minYesNo<norm16<limitNoNo.
|
|
const uint16_t *getMapping(uint16_t norm16) const { return extraData+(norm16>>OFFSET_SHIFT); }
|
|
const uint16_t *getCompositionsListForDecompYes(uint16_t norm16) const {
|
|
if(norm16<JAMO_L || MIN_NORMAL_MAYBE_YES<=norm16) {
|
|
return NULL;
|
|
} else if(norm16<minMaybeYes) {
|
|
return getMapping(norm16); // for yesYes; if Jamo L: harmless empty list
|
|
} else {
|
|
return maybeYesCompositions+norm16-minMaybeYes;
|
|
}
|
|
}
|
|
const uint16_t *getCompositionsListForComposite(uint16_t norm16) const {
|
|
// A composite has both mapping & compositions list.
|
|
const uint16_t *list=getMapping(norm16);
|
|
return list+ // mapping pointer
|
|
1+ // +1 to skip the first unit with the mapping length
|
|
(*list&MAPPING_LENGTH_MASK); // + mapping length
|
|
}
|
|
const uint16_t *getCompositionsListForMaybe(uint16_t norm16) const {
|
|
// minMaybeYes<=norm16<MIN_NORMAL_MAYBE_YES
|
|
return maybeYesCompositions+((norm16-minMaybeYes)>>OFFSET_SHIFT);
|
|
}
|
|
/**
|
|
* @param c code point must have compositions
|
|
* @return compositions list pointer
|
|
*/
|
|
const uint16_t *getCompositionsList(uint16_t norm16) const {
|
|
return isDecompYes(norm16) ?
|
|
getCompositionsListForDecompYes(norm16) :
|
|
getCompositionsListForComposite(norm16);
|
|
}
|
|
|
|
const char16_t *copyLowPrefixFromNulTerminated(const char16_t *src,
|
|
UChar32 minNeedDataCP,
|
|
ReorderingBuffer *buffer,
|
|
UErrorCode &errorCode) const;
|
|
|
|
enum StopAt { STOP_AT_LIMIT, STOP_AT_DECOMP_BOUNDARY, STOP_AT_COMP_BOUNDARY };
|
|
|
|
const char16_t *decomposeShort(const char16_t *src, const char16_t *limit,
|
|
UBool stopAtCompBoundary, UBool onlyContiguous,
|
|
ReorderingBuffer &buffer, UErrorCode &errorCode) const;
|
|
UBool decompose(UChar32 c, uint16_t norm16,
|
|
ReorderingBuffer &buffer, UErrorCode &errorCode) const;
|
|
|
|
const uint8_t *decomposeShort(const uint8_t *src, const uint8_t *limit,
|
|
StopAt stopAt, UBool onlyContiguous,
|
|
ReorderingBuffer &buffer, UErrorCode &errorCode) const;
|
|
|
|
static int32_t combine(const uint16_t *list, UChar32 trail);
|
|
void addComposites(const uint16_t *list, UnicodeSet &set) const;
|
|
void recompose(ReorderingBuffer &buffer, int32_t recomposeStartIndex,
|
|
UBool onlyContiguous) const;
|
|
|
|
UBool hasCompBoundaryBefore(UChar32 c, uint16_t norm16) const {
|
|
return c<minCompNoMaybeCP || norm16HasCompBoundaryBefore(norm16);
|
|
}
|
|
UBool norm16HasCompBoundaryBefore(uint16_t norm16) const {
|
|
return norm16 < minNoNoCompNoMaybeCC || isAlgorithmicNoNo(norm16);
|
|
}
|
|
UBool hasCompBoundaryBefore(const char16_t *src, const char16_t *limit) const;
|
|
UBool hasCompBoundaryBefore(const uint8_t *src, const uint8_t *limit) const;
|
|
UBool hasCompBoundaryAfter(const char16_t *start, const char16_t *p,
|
|
UBool onlyContiguous) const;
|
|
UBool hasCompBoundaryAfter(const uint8_t *start, const uint8_t *p,
|
|
UBool onlyContiguous) const;
|
|
UBool norm16HasCompBoundaryAfter(uint16_t norm16, UBool onlyContiguous) const {
|
|
return (norm16 & HAS_COMP_BOUNDARY_AFTER) != 0 &&
|
|
(!onlyContiguous || isTrailCC01ForCompBoundaryAfter(norm16));
|
|
}
|
|
/** For FCC: Given norm16 HAS_COMP_BOUNDARY_AFTER, does it have tccc<=1? */
|
|
UBool isTrailCC01ForCompBoundaryAfter(uint16_t norm16) const {
|
|
return isInert(norm16) || (isDecompNoAlgorithmic(norm16) ?
|
|
(norm16 & DELTA_TCCC_MASK) <= DELTA_TCCC_1 : *getMapping(norm16) <= 0x1ff);
|
|
}
|
|
|
|
const char16_t *findPreviousCompBoundary(const char16_t *start, const char16_t *p, UBool onlyContiguous) const;
|
|
const char16_t *findNextCompBoundary(const char16_t *p, const char16_t *limit, UBool onlyContiguous) const;
|
|
|
|
const char16_t *findPreviousFCDBoundary(const char16_t *start, const char16_t *p) const;
|
|
const char16_t *findNextFCDBoundary(const char16_t *p, const char16_t *limit) const;
|
|
|
|
void makeCanonIterDataFromNorm16(UChar32 start, UChar32 end, const uint16_t norm16,
|
|
CanonIterData &newData, UErrorCode &errorCode) const;
|
|
|
|
int32_t getCanonValue(UChar32 c) const;
|
|
const UnicodeSet &getCanonStartSet(int32_t n) const;
|
|
|
|
// UVersionInfo dataVersion;
|
|
|
|
// BMP code point thresholds for quick check loops looking at single UTF-16 code units.
|
|
char16_t minDecompNoCP;
|
|
char16_t minCompNoMaybeCP;
|
|
char16_t minLcccCP;
|
|
|
|
// Norm16 value thresholds for quick check combinations and types of extra data.
|
|
uint16_t minYesNo;
|
|
uint16_t minYesNoMappingsOnly;
|
|
uint16_t minNoNo;
|
|
uint16_t minNoNoCompBoundaryBefore;
|
|
uint16_t minNoNoCompNoMaybeCC;
|
|
uint16_t minNoNoEmpty;
|
|
uint16_t limitNoNo;
|
|
uint16_t centerNoNoDelta;
|
|
uint16_t minMaybeYes;
|
|
|
|
const UCPTrie *normTrie;
|
|
const uint16_t *maybeYesCompositions;
|
|
const uint16_t *extraData; // mappings and/or compositions for yesYes, yesNo & noNo characters
|
|
const uint8_t *smallFCD; // [0x100] one bit per 32 BMP code points, set if any FCD!=0
|
|
|
|
UInitOnce fCanonIterDataInitOnce {};
|
|
CanonIterData *fCanonIterData;
|
|
};
|
|
|
|
// bits in canonIterData
|
|
#define CANON_NOT_SEGMENT_STARTER 0x80000000
|
|
#define CANON_HAS_COMPOSITIONS 0x40000000
|
|
#define CANON_HAS_SET 0x200000
|
|
#define CANON_VALUE_MASK 0x1fffff
|
|
|
|
/**
|
|
* ICU-internal shortcut for quick access to standard Unicode normalization.
|
|
*/
|
|
class U_COMMON_API Normalizer2Factory {
|
|
public:
|
|
static const Normalizer2 *getFCDInstance(UErrorCode &errorCode);
|
|
static const Normalizer2 *getFCCInstance(UErrorCode &errorCode);
|
|
static const Normalizer2 *getNoopInstance(UErrorCode &errorCode);
|
|
|
|
static const Normalizer2 *getInstance(UNormalizationMode mode, UErrorCode &errorCode);
|
|
|
|
static const Normalizer2Impl *getNFCImpl(UErrorCode &errorCode);
|
|
static const Normalizer2Impl *getNFKCImpl(UErrorCode &errorCode);
|
|
static const Normalizer2Impl *getNFKC_CFImpl(UErrorCode &errorCode);
|
|
|
|
// Get the Impl instance of the Normalizer2.
|
|
// Must be used only when it is known that norm2 is a Normalizer2WithImpl instance.
|
|
static const Normalizer2Impl *getImpl(const Normalizer2 *norm2);
|
|
private:
|
|
Normalizer2Factory() = delete; // No instantiation.
|
|
};
|
|
|
|
U_NAMESPACE_END
|
|
|
|
U_CAPI int32_t U_EXPORT2
|
|
unorm2_swap(const UDataSwapper *ds,
|
|
const void *inData, int32_t length, void *outData,
|
|
UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Get the NF*_QC property for a code point, for u_getIntPropertyValue().
|
|
* @internal
|
|
*/
|
|
U_CFUNC UNormalizationCheckResult
|
|
unorm_getQuickCheck(UChar32 c, UNormalizationMode mode);
|
|
|
|
/**
|
|
* Gets the 16-bit FCD value (lead & trail CCs) for a code point, for u_getIntPropertyValue().
|
|
* @internal
|
|
*/
|
|
U_CFUNC uint16_t
|
|
unorm_getFCD16(UChar32 c);
|
|
|
|
/**
|
|
* Format of Normalizer2 .nrm data files.
|
|
* Format version 4.0.
|
|
*
|
|
* Normalizer2 .nrm data files provide data for the Unicode Normalization algorithms.
|
|
* ICU ships with data files for standard Unicode Normalization Forms
|
|
* NFC and NFD (nfc.nrm), NFKC and NFKD (nfkc.nrm),
|
|
* NFKC_Casefold (nfkc_cf.nrm) and NFKC_Simple_Casefold (nfkc_scf.nrm).
|
|
* Custom (application-specific) data can be built into additional .nrm files
|
|
* with the gennorm2 build tool.
|
|
* ICU ships with one such file, uts46.nrm, for the implementation of UTS #46.
|
|
*
|
|
* Normalizer2.getInstance() causes a .nrm file to be loaded, unless it has been
|
|
* cached already. Internally, Normalizer2Impl.load() reads the .nrm file.
|
|
*
|
|
* A .nrm file begins with a standard ICU data file header
|
|
* (DataHeader, see ucmndata.h and unicode/udata.h).
|
|
* The UDataInfo.dataVersion field usually contains the Unicode version
|
|
* for which the data was generated.
|
|
*
|
|
* After the header, the file contains the following parts.
|
|
* Constants are defined as enum values of the Normalizer2Impl class.
|
|
*
|
|
* Many details of the data structures are described in the design doc
|
|
* which is at https://icu.unicode.org/design/normalization/custom
|
|
*
|
|
* int32_t indexes[indexesLength]; -- indexesLength=indexes[IX_NORM_TRIE_OFFSET]/4;
|
|
*
|
|
* The first eight indexes are byte offsets in ascending order.
|
|
* Each byte offset marks the start of the next part in the data file,
|
|
* and the end of the previous one.
|
|
* When two consecutive byte offsets are the same, then the corresponding part is empty.
|
|
* Byte offsets are offsets from after the header,
|
|
* that is, from the beginning of the indexes[].
|
|
* Each part starts at an offset with proper alignment for its data.
|
|
* If necessary, the previous part may include padding bytes to achieve this alignment.
|
|
*
|
|
* minDecompNoCP=indexes[IX_MIN_DECOMP_NO_CP] is the lowest code point
|
|
* with a decomposition mapping, that is, with NF*D_QC=No.
|
|
* minCompNoMaybeCP=indexes[IX_MIN_COMP_NO_MAYBE_CP] is the lowest code point
|
|
* with NF*C_QC=No (has a one-way mapping) or Maybe (combines backward).
|
|
* minLcccCP=indexes[IX_MIN_LCCC_CP] (index 18, new in formatVersion 3)
|
|
* is the lowest code point with lccc!=0.
|
|
*
|
|
* The next eight indexes are thresholds of 16-bit trie values for ranges of
|
|
* values indicating multiple normalization properties.
|
|
* They are listed here in threshold order, not in the order they are stored in the indexes.
|
|
* minYesNo=indexes[IX_MIN_YES_NO];
|
|
* minYesNoMappingsOnly=indexes[IX_MIN_YES_NO_MAPPINGS_ONLY];
|
|
* minNoNo=indexes[IX_MIN_NO_NO];
|
|
* minNoNoCompBoundaryBefore=indexes[IX_MIN_NO_NO_COMP_BOUNDARY_BEFORE];
|
|
* minNoNoCompNoMaybeCC=indexes[IX_MIN_NO_NO_COMP_NO_MAYBE_CC];
|
|
* minNoNoEmpty=indexes[IX_MIN_NO_NO_EMPTY];
|
|
* limitNoNo=indexes[IX_LIMIT_NO_NO];
|
|
* minMaybeYes=indexes[IX_MIN_MAYBE_YES];
|
|
* See the normTrie description below and the design doc for details.
|
|
*
|
|
* UCPTrie normTrie; -- see ucptrie_impl.h and ucptrie.h, same as Java CodePointTrie
|
|
*
|
|
* The trie holds the main normalization data. Each code point is mapped to a 16-bit value.
|
|
* Rather than using independent bits in the value (which would require more than 16 bits),
|
|
* information is extracted primarily via range checks.
|
|
* Except, format version 3 uses bit 0 for hasCompBoundaryAfter().
|
|
* For example, a 16-bit value norm16 in the range minYesNo<=norm16<minNoNo
|
|
* means that the character has NF*C_QC=Yes and NF*D_QC=No properties,
|
|
* which means it has a two-way (round-trip) decomposition mapping.
|
|
* Values in the range 2<=norm16<limitNoNo are also directly indexes into the extraData
|
|
* pointing to mappings, compositions lists, or both.
|
|
* Value norm16==INERT (0 in versions 1 & 2, 1 in version 3)
|
|
* means that the character is normalization-inert, that is,
|
|
* it does not have a mapping, does not participate in composition, has a zero
|
|
* canonical combining class, and forms a boundary where text before it and after it
|
|
* can be normalized independently.
|
|
* For details about how multiple properties are encoded in 16-bit values
|
|
* see the design doc.
|
|
* Note that the encoding cannot express all combinations of the properties involved;
|
|
* it only supports those combinations that are allowed by
|
|
* the Unicode Normalization algorithms. Details are in the design doc as well.
|
|
* The gennorm2 tool only builds .nrm files for data that conforms to the limitations.
|
|
*
|
|
* The trie has a value for each lead surrogate code unit representing the "worst case"
|
|
* properties of the 1024 supplementary characters whose UTF-16 form starts with
|
|
* the lead surrogate. If all of the 1024 supplementary characters are normalization-inert,
|
|
* then their lead surrogate code unit has the trie value INERT.
|
|
* When the lead surrogate unit's value exceeds the quick check minimum during processing,
|
|
* the properties for the full supplementary code point need to be looked up.
|
|
*
|
|
* uint16_t maybeYesCompositions[MIN_NORMAL_MAYBE_YES-minMaybeYes];
|
|
* uint16_t extraData[];
|
|
*
|
|
* There is only one byte offset for the end of these two arrays.
|
|
* The split between them is given by the constant and variable mentioned above.
|
|
* In version 3, the difference must be shifted right by OFFSET_SHIFT.
|
|
*
|
|
* The maybeYesCompositions array contains compositions lists for characters that
|
|
* combine both forward (as starters in composition pairs)
|
|
* and backward (as trailing characters in composition pairs).
|
|
* Such characters do not occur in Unicode 5.2 but are allowed by
|
|
* the Unicode Normalization algorithms.
|
|
* If there are no such characters, then minMaybeYes==MIN_NORMAL_MAYBE_YES
|
|
* and the maybeYesCompositions array is empty.
|
|
* If there are such characters, then minMaybeYes is subtracted from their norm16 values
|
|
* to get the index into this array.
|
|
*
|
|
* The extraData array contains compositions lists for "YesYes" characters,
|
|
* followed by mappings and optional compositions lists for "YesNo" characters,
|
|
* followed by only mappings for "NoNo" characters.
|
|
* (Referring to pairs of NFC/NFD quick check values.)
|
|
* The norm16 values of those characters are directly indexes into the extraData array.
|
|
* In version 3, the norm16 values must be shifted right by OFFSET_SHIFT
|
|
* for accessing extraData.
|
|
*
|
|
* The data structures for compositions lists and mappings are described in the design doc.
|
|
*
|
|
* uint8_t smallFCD[0x100]; -- new in format version 2
|
|
*
|
|
* This is a bit set to help speed up FCD value lookups in the absence of a full
|
|
* UTrie2 or other large data structure with the full FCD value mapping.
|
|
*
|
|
* Each smallFCD bit is set if any of the corresponding 32 BMP code points
|
|
* has a non-zero FCD value (lccc!=0 or tccc!=0).
|
|
* Bit 0 of smallFCD[0] is for U+0000..U+001F. Bit 7 of smallFCD[0xff] is for U+FFE0..U+FFFF.
|
|
* A bit for 32 lead surrogates is set if any of the 32k corresponding
|
|
* _supplementary_ code points has a non-zero FCD value.
|
|
*
|
|
* This bit set is most useful for the large blocks of CJK characters with FCD=0.
|
|
*
|
|
* Changes from format version 1 to format version 2 ---------------------------
|
|
*
|
|
* - Addition of data for raw (not recursively decomposed) mappings.
|
|
* + The MAPPING_NO_COMP_BOUNDARY_AFTER bit in the extraData is now also set when
|
|
* the mapping is to an empty string or when the character combines-forward.
|
|
* This subsumes the one actual use of the MAPPING_PLUS_COMPOSITION_LIST bit which
|
|
* is then repurposed for the MAPPING_HAS_RAW_MAPPING bit.
|
|
* + For details see the design doc.
|
|
* - Addition of indexes[IX_MIN_YES_NO_MAPPINGS_ONLY] and separation of the yesNo extraData into
|
|
* distinct ranges (combines-forward vs. not)
|
|
* so that a range check can be used to find out if there is a compositions list.
|
|
* This is fully equivalent with formatVersion 1's MAPPING_PLUS_COMPOSITION_LIST flag.
|
|
* It is needed for the new (in ICU 49) composePair(), not for other normalization.
|
|
* - Addition of the smallFCD[] bit set.
|
|
*
|
|
* Changes from format version 2 to format version 3 (ICU 60) ------------------
|
|
*
|
|
* - norm16 bit 0 indicates hasCompBoundaryAfter(),
|
|
* except that for contiguous composition (FCC) the tccc must be checked as well.
|
|
* Data indexes and ccc values are shifted left by one (OFFSET_SHIFT).
|
|
* Thresholds like minNoNo are tested before shifting.
|
|
*
|
|
* - Algorithmic mapping deltas are shifted left by two more bits (total DELTA_SHIFT),
|
|
* to make room for two bits (three values) indicating whether the tccc is 0, 1, or greater.
|
|
* See DELTA_TCCC_MASK etc.
|
|
* This helps with fetching tccc/FCD values and FCC hasCompBoundaryAfter().
|
|
* minMaybeYes is 8-aligned so that the DELTA_TCCC_MASK bits can be tested directly.
|
|
*
|
|
* - Algorithmic mappings are only used for mapping to "comp yes and ccc=0" characters,
|
|
* and ASCII characters are mapped algorithmically only to other ASCII characters.
|
|
* This helps with hasCompBoundaryBefore() and compose() fast paths.
|
|
* It is never necessary any more to loop for algorithmic mappings.
|
|
*
|
|
* - Addition of indexes[IX_MIN_NO_NO_COMP_BOUNDARY_BEFORE],
|
|
* indexes[IX_MIN_NO_NO_COMP_NO_MAYBE_CC], and indexes[IX_MIN_NO_NO_EMPTY],
|
|
* and separation of the noNo extraData into distinct ranges.
|
|
* With this, the noNo norm16 value indicates whether the mapping is
|
|
* compose-normalized, not normalized but hasCompBoundaryBefore(),
|
|
* not even that, or maps to an empty string.
|
|
* hasCompBoundaryBefore() can be determined solely from the norm16 value.
|
|
*
|
|
* - The norm16 value for Hangul LVT is now different from that for Hangul LV,
|
|
* so that hasCompBoundaryAfter() need not check for the syllable type.
|
|
* For Hangul LV, minYesNo continues to be used (no comp-boundary-after).
|
|
* For Hangul LVT, minYesNoMappingsOnly|HAS_COMP_BOUNDARY_AFTER is used.
|
|
* The extraData units at these indexes are set to firstUnit=2 and firstUnit=3, respectively,
|
|
* to simplify some code.
|
|
*
|
|
* - The extraData firstUnit bit 5 is no longer necessary
|
|
* (norm16 bit 0 used instead of firstUnit MAPPING_NO_COMP_BOUNDARY_AFTER),
|
|
* is reserved again, and always set to 0.
|
|
*
|
|
* - Addition of indexes[IX_MIN_LCCC_CP], the first code point where lccc!=0.
|
|
* This used to be hardcoded to U+0300, but in data like NFKC_Casefold it is lower:
|
|
* U+00AD Soft Hyphen maps to an empty string,
|
|
* which is artificially assigned "worst case" values lccc=1 and tccc=255.
|
|
*
|
|
* - A mapping to an empty string has explicit lccc=1 and tccc=255 values.
|
|
*
|
|
* Changes from format version 3 to format version 4 (ICU 63) ------------------
|
|
*
|
|
* Switched from UTrie2 to UCPTrie/CodePointTrie.
|
|
*
|
|
* The new trie no longer stores different values for surrogate code *units* vs.
|
|
* surrogate code *points*.
|
|
* Lead surrogates still have values for optimized UTF-16 string processing.
|
|
* When looking up code point properties, the code now checks for lead surrogates and
|
|
* treats them as inert.
|
|
*
|
|
* gennorm2 now has to reject mappings for surrogate code points.
|
|
* UTS #46 maps unpaired surrogates to U+FFFD in code rather than via its
|
|
* custom normalization data file.
|
|
*/
|
|
|
|
#endif /* !UCONFIG_NO_NORMALIZATION */
|
|
#endif /* __NORMALIZER2IMPL_H__ */
|