// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ******************************************************************************* * Copyright (C) 2011, International Business Machines * Corporation and others. All Rights Reserved. ******************************************************************************* * file name: ustr_titlecase_brkiter.cpp * encoding: UTF-8 * tab size: 8 (not used) * indentation:4 * * created on: 2011may30 * created by: Markus W. Scherer * * Titlecasing functions that are based on BreakIterator * were moved here to break dependency cycles among parts of the common library. */ #include "unicode/utypes.h" #if !UCONFIG_NO_BREAK_ITERATION #include "unicode/brkiter.h" #include "unicode/casemap.h" #include "unicode/chariter.h" #include "unicode/localpointer.h" #include "unicode/ubrk.h" #include "unicode/ucasemap.h" #include "unicode/utext.h" #include "cmemory.h" #include "uassert.h" #include "ucase.h" #include "ucasemap_imp.h" U_NAMESPACE_BEGIN /** * Whole-string BreakIterator. * Titlecasing only calls setText(), first(), and next(). * We implement the rest only to satisfy the abstract interface. */ class WholeStringBreakIterator : public BreakIterator { public: WholeStringBreakIterator() : BreakIterator(), length(0) {} ~WholeStringBreakIterator() U_OVERRIDE; bool operator==(const BreakIterator&) const U_OVERRIDE; WholeStringBreakIterator *clone() const U_OVERRIDE; static UClassID U_EXPORT2 getStaticClassID(); UClassID getDynamicClassID() const U_OVERRIDE; CharacterIterator &getText() const U_OVERRIDE; UText *getUText(UText *fillIn, UErrorCode &errorCode) const U_OVERRIDE; void setText(const UnicodeString &text) U_OVERRIDE; void setText(UText *text, UErrorCode &errorCode) U_OVERRIDE; void adoptText(CharacterIterator* it) U_OVERRIDE; int32_t first() U_OVERRIDE; int32_t last() U_OVERRIDE; int32_t previous() U_OVERRIDE; int32_t next() U_OVERRIDE; int32_t current() const U_OVERRIDE; int32_t following(int32_t offset) U_OVERRIDE; int32_t preceding(int32_t offset) U_OVERRIDE; UBool isBoundary(int32_t offset) U_OVERRIDE; int32_t next(int32_t n) U_OVERRIDE; WholeStringBreakIterator *createBufferClone(void *stackBuffer, int32_t &BufferSize, UErrorCode &errorCode) U_OVERRIDE; WholeStringBreakIterator &refreshInputText(UText *input, UErrorCode &errorCode) U_OVERRIDE; private: int32_t length; }; UOBJECT_DEFINE_RTTI_IMPLEMENTATION(WholeStringBreakIterator) WholeStringBreakIterator::~WholeStringBreakIterator() {} bool WholeStringBreakIterator::operator==(const BreakIterator&) const { return false; } WholeStringBreakIterator *WholeStringBreakIterator::clone() const { return nullptr; } CharacterIterator &WholeStringBreakIterator::getText() const { UPRV_UNREACHABLE_EXIT; // really should not be called } UText *WholeStringBreakIterator::getUText(UText * /*fillIn*/, UErrorCode &errorCode) const { if (U_SUCCESS(errorCode)) { errorCode = U_UNSUPPORTED_ERROR; } return nullptr; } void WholeStringBreakIterator::setText(const UnicodeString &text) { length = text.length(); } void WholeStringBreakIterator::setText(UText *text, UErrorCode &errorCode) { if (U_SUCCESS(errorCode)) { int64_t length64 = utext_nativeLength(text); if (length64 <= INT32_MAX) { length = (int32_t)length64; } else { errorCode = U_INDEX_OUTOFBOUNDS_ERROR; } } } void WholeStringBreakIterator::adoptText(CharacterIterator*) { UPRV_UNREACHABLE_EXIT; // should not be called } int32_t WholeStringBreakIterator::first() { return 0; } int32_t WholeStringBreakIterator::last() { return length; } int32_t WholeStringBreakIterator::previous() { return 0; } int32_t WholeStringBreakIterator::next() { return length; } int32_t WholeStringBreakIterator::current() const { return 0; } int32_t WholeStringBreakIterator::following(int32_t /*offset*/) { return length; } int32_t WholeStringBreakIterator::preceding(int32_t /*offset*/) { return 0; } UBool WholeStringBreakIterator::isBoundary(int32_t /*offset*/) { return false; } int32_t WholeStringBreakIterator::next(int32_t /*n*/) { return length; } WholeStringBreakIterator *WholeStringBreakIterator::createBufferClone( void * /*stackBuffer*/, int32_t & /*BufferSize*/, UErrorCode &errorCode) { if (U_SUCCESS(errorCode)) { errorCode = U_UNSUPPORTED_ERROR; } return nullptr; } WholeStringBreakIterator &WholeStringBreakIterator::refreshInputText( UText * /*input*/, UErrorCode &errorCode) { if (U_SUCCESS(errorCode)) { errorCode = U_UNSUPPORTED_ERROR; } return *this; } U_CFUNC BreakIterator *ustrcase_getTitleBreakIterator( const Locale *locale, const char *locID, uint32_t options, BreakIterator *iter, LocalPointer &ownedIter, UErrorCode &errorCode) { if (U_FAILURE(errorCode)) { return nullptr; } options &= U_TITLECASE_ITERATOR_MASK; if (options != 0 && iter != nullptr) { errorCode = U_ILLEGAL_ARGUMENT_ERROR; return nullptr; } if (iter == nullptr) { switch (options) { case 0: iter = BreakIterator::createWordInstance( locale != nullptr ? *locale : Locale(locID), errorCode); break; case U_TITLECASE_WHOLE_STRING: iter = new WholeStringBreakIterator(); if (iter == nullptr) { errorCode = U_MEMORY_ALLOCATION_ERROR; } break; case U_TITLECASE_SENTENCES: iter = BreakIterator::createSentenceInstance( locale != nullptr ? *locale : Locale(locID), errorCode); break; default: errorCode = U_ILLEGAL_ARGUMENT_ERROR; break; } ownedIter.adoptInstead(iter); } return iter; } int32_t CaseMap::toTitle( const char *locale, uint32_t options, BreakIterator *iter, const UChar *src, int32_t srcLength, UChar *dest, int32_t destCapacity, Edits *edits, UErrorCode &errorCode) { LocalPointer ownedIter; iter = ustrcase_getTitleBreakIterator(nullptr, locale, options, iter, ownedIter, errorCode); if(iter==NULL) { return 0; } UnicodeString s(srcLength<0, src, srcLength); iter->setText(s); return ustrcase_map( ustrcase_getCaseLocale(locale), options, iter, dest, destCapacity, src, srcLength, ustrcase_internalToTitle, edits, errorCode); } U_NAMESPACE_END U_NAMESPACE_USE U_CAPI int32_t U_EXPORT2 u_strToTitle(UChar *dest, int32_t destCapacity, const UChar *src, int32_t srcLength, UBreakIterator *titleIter, const char *locale, UErrorCode *pErrorCode) { LocalPointer ownedIter; BreakIterator *iter = ustrcase_getTitleBreakIterator( nullptr, locale, 0, reinterpret_cast(titleIter), ownedIter, *pErrorCode); if (iter == nullptr) { return 0; } UnicodeString s(srcLength<0, src, srcLength); iter->setText(s); return ustrcase_mapWithOverlap( ustrcase_getCaseLocale(locale), 0, iter, dest, destCapacity, src, srcLength, ustrcase_internalToTitle, *pErrorCode); } U_CAPI int32_t U_EXPORT2 ucasemap_toTitle(UCaseMap *csm, UChar *dest, int32_t destCapacity, const UChar *src, int32_t srcLength, UErrorCode *pErrorCode) { if (U_FAILURE(*pErrorCode)) { return 0; } if (csm->iter == NULL) { LocalPointer ownedIter; BreakIterator *iter = ustrcase_getTitleBreakIterator( nullptr, csm->locale, csm->options, nullptr, ownedIter, *pErrorCode); if (iter == nullptr) { return 0; } csm->iter = ownedIter.orphan(); } UnicodeString s(srcLength<0, src, srcLength); csm->iter->setText(s); return ustrcase_map( csm->caseLocale, csm->options, csm->iter, dest, destCapacity, src, srcLength, ustrcase_internalToTitle, NULL, *pErrorCode); } #endif // !UCONFIG_NO_BREAK_ITERATION