194 lines
6.2 KiB
C++
194 lines
6.2 KiB
C++
/*
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*******************************************************************************
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* Copyright (C) 1996-1999, International Business Machines Corporation and *
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* others. All Rights Reserved. *
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*******************************************************************************
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*/
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//=============================================================================
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//
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// File coll.cpp
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//
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//
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//
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// Created by: Helena Shih
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//
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// Modification History:
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//
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// Date Name Description
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// 2/5/97 aliu Modified createDefault to load collation data from
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// binary files when possible. Added related methods
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// createCollationFromFile, chopLocale, createPathName.
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// 2/11/97 aliu Added methods addToCache, findInCache, which implement
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// a Collation cache. Modified createDefault to look in
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// cache first, and also to store newly created Collation
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// objects in the cache. Modified to not use gLocPath.
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// 2/12/97 aliu Modified to create objects from RuleBasedCollator cache.
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// Moved cache out of Collation class.
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// 2/13/97 aliu Moved several methods out of this class and into
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// RuleBasedCollator, with modifications. Modified
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// createDefault() to call new RuleBasedCollator(Locale&)
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// constructor. General clean up and documentation.
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// 2/20/97 helena Added clone, operator==, operator!=, operator=, and copy
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// constructor.
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// 05/06/97 helena Added memory allocation error detection.
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// 05/08/97 helena Added createInstance().
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// 6/20/97 helena Java class name change.
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// 04/23/99 stephen Removed EDecompositionMode, merged with
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// Normalizer::EMode
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// 11/23/9 srl Inlining of some critical functions
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//=============================================================================
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#include "unicode/utypes.h"
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#include "colcache.h"
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#include "unicode/coll.h"
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#include "unicode/tblcoll.h"
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#include "unicode/sortkey.h"
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#include "unicode/resbund.h"
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#include "mutex.h"
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#include "unicode/normlzr.h"
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#include "cmemory.h"
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//-----------------------------------------------------------------------------
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// History
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// ICU 1.6: fVersion[3] 0->1 due to update to Normalizer algorithm and
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// tables to Unicode 3.0 / UTR15 - Liu
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const UVersionInfo Collator::fVersion = {1, 1, 0, 0};
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Collator::Collator()
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: strength(Collator::TERTIARY), decmp(Normalizer::DECOMP)
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{
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}
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Collator::Collator(ECollationStrength collationStrength,
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Normalizer::EMode decompositionMode)
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: strength(collationStrength), decmp(decompositionMode)
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{
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}
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Collator::~Collator()
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{
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}
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Collator::Collator(const Collator& other)
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: strength(other.strength), decmp(other.decmp)
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{
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}
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const Collator&
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Collator::operator=(const Collator& other)
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{
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if (this != &other) {
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strength = other.strength;
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decmp = other.decmp;
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}
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return *this;
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}
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Collator*
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Collator::createInstance(UErrorCode& success) {
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if (U_FAILURE(success))
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return 0;
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return createInstance(Locale::getDefault(), success);
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}
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Collator*
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Collator::createInstance(const Locale& desiredLocale,
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UErrorCode& status)
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{
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if (U_FAILURE(status)) return 0;
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/**
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* A bit of explanation is required here. Although in the current implementation
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* Collator::createInstance() is just turning around and calling RuleBasedCollator(Locale&),
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* this will not necessarily always be the case. For example, suppose we modify
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* this code to handle a non-table-based Collator, such as that for Thai. In this
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* case, createInstance() will have to be modified to somehow determine this fact
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* (perhaps a field in the resource bundle). Then it can construct the non-table-based
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* Collator in some other way, when it sees that it needs to.
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*
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* The specific caution is this: RuleBasedCollator(Locale&) will ALWAYS return a
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* valid collation object, if the system if functioning properly. The reason
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* is that it will fall back, use the default locale, and even use the built-in
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* default collation rules. THEREFORE, createInstance() should in general ONLY CALL
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* RuleBasedCollator(Locale&) IF IT KNOWS IN ADVANCE that the given locale's collation
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* is properly implemented as a RuleBasedCollator.
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*
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* Currently, we don't do this...we always return a RuleBasedCollator, whether it
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* is strictly correct to do so or not, without checking, because we currently
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* have no way of checking.
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*/
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RuleBasedCollator* collation = new RuleBasedCollator(desiredLocale, status);
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if (U_FAILURE(status))
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{
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delete collation;
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collation = 0;
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}
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return collation;
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}
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UBool
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Collator::equals(const UnicodeString& source,
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const UnicodeString& target) const
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{
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return (compare(source, target) == Collator::EQUAL);
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}
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UBool
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Collator::greaterOrEqual(const UnicodeString& source,
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const UnicodeString& target) const
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{
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return (compare(source, target) != Collator::LESS);
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}
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UBool
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Collator::greater(const UnicodeString& source,
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const UnicodeString& target) const
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{
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return (compare(source, target) == Collator::GREATER);
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}
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void
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Collator::setStrength(Collator::ECollationStrength newStrength)
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{
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strength = newStrength;
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}
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void
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Collator::setDecomposition(Normalizer::EMode decompositionMode)
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{
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decmp = decompositionMode;
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}
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const Locale*
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Collator::getAvailableLocales(int32_t& count)
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{
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return Locale::getAvailableLocales(count);
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}
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UnicodeString&
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Collator::getDisplayName( const Locale& objectLocale,
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const Locale& displayLocale,
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UnicodeString& name)
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{
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return objectLocale.getDisplayName(displayLocale, name);
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}
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UnicodeString&
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Collator::getDisplayName( const Locale& objectLocale,
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UnicodeString& name)
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{
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return objectLocale.getDisplayName(Locale::getDefault(), name);
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}
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void
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Collator::getVersion(UVersionInfo versionInfo) const
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{
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if(versionInfo!=NULL) {
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uprv_memcpy(versionInfo, fVersion, U_MAX_VERSION_LENGTH);
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}
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}
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//eof
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