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127 lines
3.1 KiB
C++
127 lines
3.1 KiB
C++
/*
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* PROGRAM: JRD International support
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* MODULE: intl_classes.h
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* DESCRIPTION: International text handling definitions
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*
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* The contents of this file are subject to the Initial
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* Developer's Public License Version 1.0 (the "License");
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* you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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* http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_idpl.
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*
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* Software distributed under the License is distributed AS IS,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied.
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* See the License for the specific language governing rights
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* and limitations under the License.
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*
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* The Original Code was created by Nickolay Samofatov
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* for the Firebird Open Source RDBMS project.
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*
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* Copyright (c) 2004 Nickolay Samofatov <nickolay@broadviewsoftware.com>
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* and all contributors signed below.
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*
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* All Rights Reserved.
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* Contributor(s): ______________________________________.
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*
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*/
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#ifndef JRD_INTL_CLASSES_H
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#define JRD_INTL_CLASSES_H
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#include "firebird.h"
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#include "../common/intlobj_new.h"
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#include "../jrd/constants.h"
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#include "../common/unicode_util.h"
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#include "../common/CsConvert.h"
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#include "../common/CharSet.h"
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#include "../common/TextType.h"
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namespace Jrd {
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class PatternMatcher
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{
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public:
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PatternMatcher(MemoryPool& aPool, Firebird::TextType* aTextType)
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: pool(aPool),
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textType(aTextType)
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{
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}
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virtual ~PatternMatcher()
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{
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}
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virtual void reset() = 0;
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virtual bool process(const UCHAR*, SLONG) = 0;
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virtual bool result() = 0;
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protected:
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MemoryPool& pool;
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Firebird::TextType* textType;
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};
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class BaseSubstringSimilarMatcher : public PatternMatcher
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{
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public:
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BaseSubstringSimilarMatcher(MemoryPool& pool, Firebird::TextType* ttype)
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: PatternMatcher(pool, ttype)
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{
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}
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virtual void getResultInfo(unsigned* start, unsigned* length) = 0;
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};
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class NullStrConverter
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{
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public:
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NullStrConverter(MemoryPool& /*pool*/, const Firebird::TextType* /*obj*/, const UCHAR* /*str*/, SLONG /*len*/)
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{
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}
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};
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template <typename PrevConverter = NullStrConverter>
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class UpcaseConverter : public PrevConverter
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{
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public:
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UpcaseConverter(MemoryPool& pool, Firebird::TextType* obj, const UCHAR*& str, SLONG& len)
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: PrevConverter(pool, obj, str, len)
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{
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const auto charSet = obj->getCharSet();
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const auto bufferSize = len / charSet->minBytesPerChar() * charSet->maxBytesPerChar();
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len = obj->str_to_upper(len, str, bufferSize, tempBuffer.getBuffer(bufferSize, false));
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str = tempBuffer.begin();
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}
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private:
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Firebird::UCharBuffer tempBuffer;
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};
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template <typename PrevConverter = NullStrConverter>
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class CanonicalConverter : public PrevConverter
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{
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public:
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CanonicalConverter(MemoryPool& pool, Firebird::TextType* obj, const UCHAR*& str, SLONG& len)
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: PrevConverter(pool, obj, str, len)
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{
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const SLONG out_len = len / obj->getCharSet()->minBytesPerChar() * obj->getCanonicalWidth();
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if (str)
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{
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len = obj->canonical(len, str, out_len, tempBuffer.getBuffer(out_len, false)) * obj->getCanonicalWidth();
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str = tempBuffer.begin();
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}
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else
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len = 0;
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}
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private:
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Firebird::UCharBuffer tempBuffer;
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};
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} // namespace Jrd
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#endif // JRD_INTL_CLASSES_H
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