238 lines
8.2 KiB
C++
238 lines
8.2 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) 2011, International Business Machines
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* Corporation and others. All Rights Reserved.
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*******************************************************************************
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* file name: ustr_titlecase_brkiter.cpp
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* encoding: UTF-8
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2011may30
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* created by: Markus W. Scherer
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*
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* Titlecasing functions that are based on BreakIterator
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* were moved here to break dependency cycles among parts of the common library.
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*/
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_BREAK_ITERATION
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#include "unicode/brkiter.h"
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#include "unicode/casemap.h"
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#include "unicode/chariter.h"
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#include "unicode/localpointer.h"
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#include "unicode/ubrk.h"
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#include "unicode/ucasemap.h"
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#include "unicode/utext.h"
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#include "cmemory.h"
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#include "uassert.h"
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#include "ucase.h"
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#include "ucasemap_imp.h"
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U_NAMESPACE_BEGIN
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/**
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* Whole-string BreakIterator.
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* Titlecasing only calls setText(), first(), and next().
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* We implement the rest only to satisfy the abstract interface.
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*/
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class WholeStringBreakIterator : public BreakIterator {
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public:
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WholeStringBreakIterator() : BreakIterator(), length(0) {}
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~WholeStringBreakIterator() U_OVERRIDE;
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UBool operator==(const BreakIterator&) const U_OVERRIDE;
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WholeStringBreakIterator *clone() const U_OVERRIDE;
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static UClassID U_EXPORT2 getStaticClassID();
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UClassID getDynamicClassID() const U_OVERRIDE;
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CharacterIterator &getText() const U_OVERRIDE;
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UText *getUText(UText *fillIn, UErrorCode &errorCode) const U_OVERRIDE;
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void setText(const UnicodeString &text) U_OVERRIDE;
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void setText(UText *text, UErrorCode &errorCode) U_OVERRIDE;
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void adoptText(CharacterIterator* it) U_OVERRIDE;
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int32_t first() U_OVERRIDE;
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int32_t last() U_OVERRIDE;
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int32_t previous() U_OVERRIDE;
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int32_t next() U_OVERRIDE;
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int32_t current() const U_OVERRIDE;
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int32_t following(int32_t offset) U_OVERRIDE;
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int32_t preceding(int32_t offset) U_OVERRIDE;
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UBool isBoundary(int32_t offset) U_OVERRIDE;
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int32_t next(int32_t n) U_OVERRIDE;
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WholeStringBreakIterator *createBufferClone(void *stackBuffer, int32_t &BufferSize,
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UErrorCode &errorCode) U_OVERRIDE;
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WholeStringBreakIterator &refreshInputText(UText *input, UErrorCode &errorCode) U_OVERRIDE;
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private:
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int32_t length;
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};
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(WholeStringBreakIterator)
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WholeStringBreakIterator::~WholeStringBreakIterator() {}
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UBool WholeStringBreakIterator::operator==(const BreakIterator&) const { return FALSE; }
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WholeStringBreakIterator *WholeStringBreakIterator::clone() const { return nullptr; }
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CharacterIterator &WholeStringBreakIterator::getText() const {
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UPRV_UNREACHABLE; // really should not be called
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}
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UText *WholeStringBreakIterator::getUText(UText * /*fillIn*/, UErrorCode &errorCode) const {
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if (U_SUCCESS(errorCode)) {
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errorCode = U_UNSUPPORTED_ERROR;
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}
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return nullptr;
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}
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void WholeStringBreakIterator::setText(const UnicodeString &text) {
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length = text.length();
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}
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void WholeStringBreakIterator::setText(UText *text, UErrorCode &errorCode) {
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if (U_SUCCESS(errorCode)) {
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int64_t length64 = utext_nativeLength(text);
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if (length64 <= INT32_MAX) {
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length = (int32_t)length64;
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} else {
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errorCode = U_INDEX_OUTOFBOUNDS_ERROR;
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}
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}
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}
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void WholeStringBreakIterator::adoptText(CharacterIterator*) {
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UPRV_UNREACHABLE; // should not be called
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}
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int32_t WholeStringBreakIterator::first() { return 0; }
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int32_t WholeStringBreakIterator::last() { return length; }
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int32_t WholeStringBreakIterator::previous() { return 0; }
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int32_t WholeStringBreakIterator::next() { return length; }
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int32_t WholeStringBreakIterator::current() const { return 0; }
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int32_t WholeStringBreakIterator::following(int32_t /*offset*/) { return length; }
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int32_t WholeStringBreakIterator::preceding(int32_t /*offset*/) { return 0; }
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UBool WholeStringBreakIterator::isBoundary(int32_t /*offset*/) { return FALSE; }
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int32_t WholeStringBreakIterator::next(int32_t /*n*/) { return length; }
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WholeStringBreakIterator *WholeStringBreakIterator::createBufferClone(
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void * /*stackBuffer*/, int32_t & /*BufferSize*/, UErrorCode &errorCode) {
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if (U_SUCCESS(errorCode)) {
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errorCode = U_UNSUPPORTED_ERROR;
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}
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return nullptr;
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}
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WholeStringBreakIterator &WholeStringBreakIterator::refreshInputText(
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UText * /*input*/, UErrorCode &errorCode) {
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if (U_SUCCESS(errorCode)) {
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errorCode = U_UNSUPPORTED_ERROR;
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}
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return *this;
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}
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U_CFUNC
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BreakIterator *ustrcase_getTitleBreakIterator(
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const Locale *locale, const char *locID, uint32_t options, BreakIterator *iter,
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LocalPointer<BreakIterator> &ownedIter, UErrorCode &errorCode) {
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if (U_FAILURE(errorCode)) { return nullptr; }
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options &= U_TITLECASE_ITERATOR_MASK;
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if (options != 0 && iter != nullptr) {
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errorCode = U_ILLEGAL_ARGUMENT_ERROR;
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return nullptr;
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}
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if (iter == nullptr) {
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switch (options) {
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case 0:
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iter = BreakIterator::createWordInstance(
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locale != nullptr ? *locale : Locale(locID), errorCode);
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break;
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case U_TITLECASE_WHOLE_STRING:
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iter = new WholeStringBreakIterator();
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if (iter == nullptr) {
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errorCode = U_MEMORY_ALLOCATION_ERROR;
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}
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break;
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case U_TITLECASE_SENTENCES:
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iter = BreakIterator::createSentenceInstance(
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locale != nullptr ? *locale : Locale(locID), errorCode);
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break;
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default:
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errorCode = U_ILLEGAL_ARGUMENT_ERROR;
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break;
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}
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ownedIter.adoptInstead(iter);
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}
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return iter;
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}
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int32_t CaseMap::toTitle(
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const char *locale, uint32_t options, BreakIterator *iter,
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const UChar *src, int32_t srcLength,
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UChar *dest, int32_t destCapacity, Edits *edits,
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UErrorCode &errorCode) {
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LocalPointer<BreakIterator> ownedIter;
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iter = ustrcase_getTitleBreakIterator(nullptr, locale, options, iter, ownedIter, errorCode);
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if(iter==NULL) {
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return 0;
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}
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UnicodeString s(srcLength<0, src, srcLength);
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iter->setText(s);
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return ustrcase_map(
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ustrcase_getCaseLocale(locale), options, iter,
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dest, destCapacity,
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src, srcLength,
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ustrcase_internalToTitle, edits, errorCode);
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}
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U_NAMESPACE_END
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U_NAMESPACE_USE
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U_CAPI int32_t U_EXPORT2
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u_strToTitle(UChar *dest, int32_t destCapacity,
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const UChar *src, int32_t srcLength,
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UBreakIterator *titleIter,
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const char *locale,
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UErrorCode *pErrorCode) {
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LocalPointer<BreakIterator> ownedIter;
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BreakIterator *iter = ustrcase_getTitleBreakIterator(
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nullptr, locale, 0, reinterpret_cast<BreakIterator *>(titleIter),
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ownedIter, *pErrorCode);
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if (iter == nullptr) {
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return 0;
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}
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UnicodeString s(srcLength<0, src, srcLength);
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iter->setText(s);
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return ustrcase_mapWithOverlap(
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ustrcase_getCaseLocale(locale), 0, iter,
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dest, destCapacity,
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src, srcLength,
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ustrcase_internalToTitle, *pErrorCode);
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}
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U_CAPI int32_t U_EXPORT2
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ucasemap_toTitle(UCaseMap *csm,
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UChar *dest, int32_t destCapacity,
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const UChar *src, int32_t srcLength,
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UErrorCode *pErrorCode) {
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if (U_FAILURE(*pErrorCode)) {
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return 0;
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}
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if (csm->iter == NULL) {
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LocalPointer<BreakIterator> ownedIter;
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BreakIterator *iter = ustrcase_getTitleBreakIterator(
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nullptr, csm->locale, csm->options, nullptr, ownedIter, *pErrorCode);
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if (iter == nullptr) {
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return 0;
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}
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csm->iter = ownedIter.orphan();
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}
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UnicodeString s(srcLength<0, src, srcLength);
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csm->iter->setText(s);
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return ustrcase_map(
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csm->caseLocale, csm->options, csm->iter,
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dest, destCapacity,
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src, srcLength,
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ustrcase_internalToTitle, NULL, *pErrorCode);
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}
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#endif // !UCONFIG_NO_BREAK_ITERATION
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