370 lines
14 KiB
C++
370 lines
14 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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* Copyright (C) 2014, International Business Machines
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* Corporation and others. All Rights Reserved.
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*******************************************************************************
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* norm2allmodes.h
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*
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* created on: 2014sep07
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* created by: Markus W. Scherer
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*/
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#ifndef __NORM2ALLMODES_H__
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#define __NORM2ALLMODES_H__
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_NORMALIZATION
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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/unistr.h"
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#include "cpputils.h"
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#include "normalizer2impl.h"
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U_NAMESPACE_BEGIN
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// Intermediate class:
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// Has Normalizer2Impl and does boilerplate argument checking and setup.
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class Normalizer2WithImpl : public Normalizer2 {
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public:
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Normalizer2WithImpl(const Normalizer2Impl &ni) : impl(ni) {}
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virtual ~Normalizer2WithImpl();
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// normalize
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virtual UnicodeString &
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normalize(const UnicodeString &src,
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UnicodeString &dest,
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UErrorCode &errorCode) const {
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if(U_FAILURE(errorCode)) {
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dest.setToBogus();
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return dest;
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}
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const UChar *sArray=src.getBuffer();
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if(&dest==&src || sArray==NULL) {
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errorCode=U_ILLEGAL_ARGUMENT_ERROR;
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dest.setToBogus();
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return dest;
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}
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dest.remove();
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ReorderingBuffer buffer(impl, dest);
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if(buffer.init(src.length(), errorCode)) {
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normalize(sArray, sArray+src.length(), buffer, errorCode);
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}
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return dest;
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}
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virtual void
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normalize(const UChar *src, const UChar *limit,
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ReorderingBuffer &buffer, UErrorCode &errorCode) const = 0;
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// normalize and append
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virtual UnicodeString &
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normalizeSecondAndAppend(UnicodeString &first,
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const UnicodeString &second,
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UErrorCode &errorCode) const {
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return normalizeSecondAndAppend(first, second, TRUE, errorCode);
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}
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virtual UnicodeString &
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append(UnicodeString &first,
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const UnicodeString &second,
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UErrorCode &errorCode) const {
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return normalizeSecondAndAppend(first, second, FALSE, errorCode);
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}
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UnicodeString &
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normalizeSecondAndAppend(UnicodeString &first,
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const UnicodeString &second,
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UBool doNormalize,
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UErrorCode &errorCode) const {
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uprv_checkCanGetBuffer(first, errorCode);
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if(U_FAILURE(errorCode)) {
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return first;
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}
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const UChar *secondArray=second.getBuffer();
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if(&first==&second || secondArray==NULL) {
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errorCode=U_ILLEGAL_ARGUMENT_ERROR;
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return first;
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}
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int32_t firstLength=first.length();
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UnicodeString safeMiddle;
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{
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ReorderingBuffer buffer(impl, first);
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if(buffer.init(firstLength+second.length(), errorCode)) {
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normalizeAndAppend(secondArray, secondArray+second.length(), doNormalize,
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safeMiddle, buffer, errorCode);
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}
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} // The ReorderingBuffer destructor finalizes the first string.
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if(U_FAILURE(errorCode)) {
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// Restore the modified suffix of the first string.
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first.replace(firstLength-safeMiddle.length(), 0x7fffffff, safeMiddle);
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}
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return first;
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}
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virtual void
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normalizeAndAppend(const UChar *src, const UChar *limit, UBool doNormalize,
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UnicodeString &safeMiddle,
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ReorderingBuffer &buffer, UErrorCode &errorCode) const = 0;
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virtual UBool
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getDecomposition(UChar32 c, UnicodeString &decomposition) const {
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UChar buffer[4];
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int32_t length;
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const UChar *d=impl.getDecomposition(c, buffer, length);
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if(d==NULL) {
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return FALSE;
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}
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if(d==buffer) {
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decomposition.setTo(buffer, length); // copy the string (Jamos from Hangul syllable c)
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} else {
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decomposition.setTo(FALSE, d, length); // read-only alias
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}
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return TRUE;
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}
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virtual UBool
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getRawDecomposition(UChar32 c, UnicodeString &decomposition) const {
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UChar buffer[30];
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int32_t length;
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const UChar *d=impl.getRawDecomposition(c, buffer, length);
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if(d==NULL) {
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return FALSE;
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}
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if(d==buffer) {
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decomposition.setTo(buffer, length); // copy the string (algorithmic decomposition)
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} else {
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decomposition.setTo(FALSE, d, length); // read-only alias
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}
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return TRUE;
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}
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virtual UChar32
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composePair(UChar32 a, UChar32 b) const {
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return impl.composePair(a, b);
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}
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virtual uint8_t
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getCombiningClass(UChar32 c) const {
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return impl.getCC(impl.getNorm16(c));
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}
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// quick checks
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virtual UBool
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isNormalized(const UnicodeString &s, UErrorCode &errorCode) const {
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if(U_FAILURE(errorCode)) {
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return FALSE;
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}
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const UChar *sArray=s.getBuffer();
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if(sArray==NULL) {
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errorCode=U_ILLEGAL_ARGUMENT_ERROR;
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return FALSE;
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}
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const UChar *sLimit=sArray+s.length();
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return sLimit==spanQuickCheckYes(sArray, sLimit, errorCode);
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}
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virtual UNormalizationCheckResult
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quickCheck(const UnicodeString &s, UErrorCode &errorCode) const {
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return Normalizer2WithImpl::isNormalized(s, errorCode) ? UNORM_YES : UNORM_NO;
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}
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virtual int32_t
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spanQuickCheckYes(const UnicodeString &s, UErrorCode &errorCode) const {
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if(U_FAILURE(errorCode)) {
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return 0;
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}
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const UChar *sArray=s.getBuffer();
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if(sArray==NULL) {
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errorCode=U_ILLEGAL_ARGUMENT_ERROR;
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return 0;
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}
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return (int32_t)(spanQuickCheckYes(sArray, sArray+s.length(), errorCode)-sArray);
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}
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virtual const UChar *
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spanQuickCheckYes(const UChar *src, const UChar *limit, UErrorCode &errorCode) const = 0;
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virtual UNormalizationCheckResult getQuickCheck(UChar32) const {
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return UNORM_YES;
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}
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const Normalizer2Impl &impl;
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};
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class DecomposeNormalizer2 : public Normalizer2WithImpl {
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public:
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DecomposeNormalizer2(const Normalizer2Impl &ni) : Normalizer2WithImpl(ni) {}
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virtual ~DecomposeNormalizer2();
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private:
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virtual void
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normalize(const UChar *src, const UChar *limit,
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ReorderingBuffer &buffer, UErrorCode &errorCode) const {
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impl.decompose(src, limit, &buffer, errorCode);
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}
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using Normalizer2WithImpl::normalize; // Avoid warning about hiding base class function.
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virtual void
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normalizeAndAppend(const UChar *src, const UChar *limit, UBool doNormalize,
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UnicodeString &safeMiddle,
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ReorderingBuffer &buffer, UErrorCode &errorCode) const {
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impl.decomposeAndAppend(src, limit, doNormalize, safeMiddle, buffer, errorCode);
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}
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virtual const UChar *
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spanQuickCheckYes(const UChar *src, const UChar *limit, UErrorCode &errorCode) const {
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return impl.decompose(src, limit, NULL, errorCode);
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}
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using Normalizer2WithImpl::spanQuickCheckYes; // Avoid warning about hiding base class function.
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virtual UNormalizationCheckResult getQuickCheck(UChar32 c) const {
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return impl.isDecompYes(impl.getNorm16(c)) ? UNORM_YES : UNORM_NO;
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}
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virtual UBool hasBoundaryBefore(UChar32 c) const { return impl.hasDecompBoundaryBefore(c); }
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virtual UBool hasBoundaryAfter(UChar32 c) const { return impl.hasDecompBoundaryAfter(c); }
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virtual UBool isInert(UChar32 c) const { return impl.isDecompInert(c); }
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};
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class ComposeNormalizer2 : public Normalizer2WithImpl {
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public:
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ComposeNormalizer2(const Normalizer2Impl &ni, UBool fcc) :
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Normalizer2WithImpl(ni), onlyContiguous(fcc) {}
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virtual ~ComposeNormalizer2();
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private:
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virtual void
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normalize(const UChar *src, const UChar *limit,
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ReorderingBuffer &buffer, UErrorCode &errorCode) const U_OVERRIDE {
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impl.compose(src, limit, onlyContiguous, TRUE, buffer, errorCode);
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}
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using Normalizer2WithImpl::normalize; // Avoid warning about hiding base class function.
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void
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normalizeUTF8(uint32_t options, StringPiece src, ByteSink &sink,
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Edits *edits, UErrorCode &errorCode) const U_OVERRIDE {
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if (U_FAILURE(errorCode)) {
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return;
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}
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if (edits != nullptr && (options & U_EDITS_NO_RESET) == 0) {
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edits->reset();
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}
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const uint8_t *s = reinterpret_cast<const uint8_t *>(src.data());
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impl.composeUTF8(options, onlyContiguous, s, s + src.length(),
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&sink, edits, errorCode);
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sink.Flush();
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}
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virtual void
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normalizeAndAppend(const UChar *src, const UChar *limit, UBool doNormalize,
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UnicodeString &safeMiddle,
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ReorderingBuffer &buffer, UErrorCode &errorCode) const U_OVERRIDE {
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impl.composeAndAppend(src, limit, doNormalize, onlyContiguous, safeMiddle, buffer, errorCode);
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}
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virtual UBool
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isNormalized(const UnicodeString &s, UErrorCode &errorCode) const U_OVERRIDE {
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if(U_FAILURE(errorCode)) {
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return FALSE;
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}
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const UChar *sArray=s.getBuffer();
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if(sArray==NULL) {
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errorCode=U_ILLEGAL_ARGUMENT_ERROR;
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return FALSE;
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}
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UnicodeString temp;
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ReorderingBuffer buffer(impl, temp);
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if(!buffer.init(5, errorCode)) { // small destCapacity for substring normalization
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return FALSE;
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}
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return impl.compose(sArray, sArray+s.length(), onlyContiguous, FALSE, buffer, errorCode);
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}
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virtual UBool
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isNormalizedUTF8(StringPiece sp, UErrorCode &errorCode) const U_OVERRIDE {
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if(U_FAILURE(errorCode)) {
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return FALSE;
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}
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const uint8_t *s = reinterpret_cast<const uint8_t *>(sp.data());
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return impl.composeUTF8(0, onlyContiguous, s, s + sp.length(), nullptr, nullptr, errorCode);
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}
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virtual UNormalizationCheckResult
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quickCheck(const UnicodeString &s, UErrorCode &errorCode) const U_OVERRIDE {
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if(U_FAILURE(errorCode)) {
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return UNORM_MAYBE;
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}
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const UChar *sArray=s.getBuffer();
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if(sArray==NULL) {
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errorCode=U_ILLEGAL_ARGUMENT_ERROR;
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return UNORM_MAYBE;
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}
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UNormalizationCheckResult qcResult=UNORM_YES;
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impl.composeQuickCheck(sArray, sArray+s.length(), onlyContiguous, &qcResult);
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return qcResult;
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}
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virtual const UChar *
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spanQuickCheckYes(const UChar *src, const UChar *limit, UErrorCode &) const U_OVERRIDE {
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return impl.composeQuickCheck(src, limit, onlyContiguous, NULL);
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}
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using Normalizer2WithImpl::spanQuickCheckYes; // Avoid warning about hiding base class function.
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virtual UNormalizationCheckResult getQuickCheck(UChar32 c) const U_OVERRIDE {
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return impl.getCompQuickCheck(impl.getNorm16(c));
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}
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virtual UBool hasBoundaryBefore(UChar32 c) const U_OVERRIDE {
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return impl.hasCompBoundaryBefore(c);
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}
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virtual UBool hasBoundaryAfter(UChar32 c) const U_OVERRIDE {
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return impl.hasCompBoundaryAfter(c, onlyContiguous);
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}
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virtual UBool isInert(UChar32 c) const U_OVERRIDE {
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return impl.isCompInert(c, onlyContiguous);
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}
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const UBool onlyContiguous;
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};
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class FCDNormalizer2 : public Normalizer2WithImpl {
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public:
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FCDNormalizer2(const Normalizer2Impl &ni) : Normalizer2WithImpl(ni) {}
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virtual ~FCDNormalizer2();
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private:
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virtual void
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normalize(const UChar *src, const UChar *limit,
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ReorderingBuffer &buffer, UErrorCode &errorCode) const {
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impl.makeFCD(src, limit, &buffer, errorCode);
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}
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using Normalizer2WithImpl::normalize; // Avoid warning about hiding base class function.
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virtual void
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normalizeAndAppend(const UChar *src, const UChar *limit, UBool doNormalize,
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UnicodeString &safeMiddle,
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ReorderingBuffer &buffer, UErrorCode &errorCode) const {
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impl.makeFCDAndAppend(src, limit, doNormalize, safeMiddle, buffer, errorCode);
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}
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virtual const UChar *
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spanQuickCheckYes(const UChar *src, const UChar *limit, UErrorCode &errorCode) const {
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return impl.makeFCD(src, limit, NULL, errorCode);
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}
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using Normalizer2WithImpl::spanQuickCheckYes; // Avoid warning about hiding base class function.
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virtual UBool hasBoundaryBefore(UChar32 c) const { return impl.hasFCDBoundaryBefore(c); }
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virtual UBool hasBoundaryAfter(UChar32 c) const { return impl.hasFCDBoundaryAfter(c); }
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virtual UBool isInert(UChar32 c) const { return impl.isFCDInert(c); }
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};
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struct Norm2AllModes : public UMemory {
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Norm2AllModes(Normalizer2Impl *i)
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: impl(i), comp(*i, FALSE), decomp(*i), fcd(*i), fcc(*i, TRUE) {}
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~Norm2AllModes();
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static Norm2AllModes *createInstance(Normalizer2Impl *impl, UErrorCode &errorCode);
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static Norm2AllModes *createNFCInstance(UErrorCode &errorCode);
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static Norm2AllModes *createInstance(const char *packageName,
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const char *name,
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UErrorCode &errorCode);
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static const Norm2AllModes *getNFCInstance(UErrorCode &errorCode);
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static const Norm2AllModes *getNFKCInstance(UErrorCode &errorCode);
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static const Norm2AllModes *getNFKC_CFInstance(UErrorCode &errorCode);
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Normalizer2Impl *impl;
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ComposeNormalizer2 comp;
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DecomposeNormalizer2 decomp;
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FCDNormalizer2 fcd;
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ComposeNormalizer2 fcc;
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};
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U_NAMESPACE_END
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#endif // !UCONFIG_NO_NORMALIZATION
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#endif // __NORM2ALLMODES_H__
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