96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
/*
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**********************************************************************
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* Copyright (C) 2005-2006, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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*/
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#ifndef __CSR2022_H
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#define __CSR2022_H
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#include "unicode/utypes.h"
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#include "csrecog.h"
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U_NAMESPACE_BEGIN
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/**
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* class CharsetRecog_2022 part of the ICU charset detection imlementation.
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* This is a superclass for the individual detectors for
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* each of the detectable members of the ISO 2022 family
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* of encodings.
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*
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* The separate classes are nested within this class.
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*
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* @internal
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*/
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class CharsetRecog_2022 : public CharsetRecognizer
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{
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public:
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virtual ~CharsetRecog_2022() = 0;
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protected:
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/**
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* Matching function shared among the 2022 detectors JP, CN and KR
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* Counts up the number of legal an unrecognized escape sequences in
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* the sample of text, and computes a score based on the total number &
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* the proportion that fit the encoding.
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*
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*
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* @param text the byte buffer containing text to analyse
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* @param textLen the size of the text in the byte.
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* @param escapeSequences the byte escape sequences to test for.
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* @return match quality, in the range of 0-100.
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*/
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int32_t match_2022(const uint8_t *text, int32_t textLen, const uint8_t escapeSequences[][5], int32_t escapeSequences_length);
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};
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class CharsetRecog_2022JP :public CharsetRecog_2022
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{
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private:
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static const uint8_t escapeSequences[][5];
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static const int32_t escapeSequences_length;
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public:
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virtual ~CharsetRecog_2022JP() {}
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const char *getName() const;
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int32_t match(InputText *textIn);
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};
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class CharsetRecog_2022KR :public CharsetRecog_2022 {
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private:
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static const uint8_t escapeSequences[][5];
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static const int32_t escapeSequences_length;
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public:
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virtual ~CharsetRecog_2022KR() {}
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const char *getName() const;
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int32_t match(InputText *textIn);
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};
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class CharsetRecog_2022CN :public CharsetRecog_2022
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{
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private:
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static const uint8_t escapeSequences[][5];
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static const int32_t escapeSequences_length;
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public:
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virtual ~CharsetRecog_2022CN() {}
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const char* getName() const;
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int32_t match(InputText *textIn);
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};
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U_NAMESPACE_END
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#endif /* __CSR2022_H */
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