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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
**********************************************************************
* Copyright (C) 2005-2015, International Business Machines
* Corporation and others. All Rights Reserved.
**********************************************************************
*/
#ifndef __CSR2022_H
#define __CSR2022_H
#include "unicode/utypes.h"
#if !UCONFIG_NO_CONVERSION
#include "csrecog.h"
U_NAMESPACE_BEGIN
class CharsetMatch;
/**
* class CharsetRecog_2022 part of the ICU charset detection implementation.
* This is a superclass for the individual detectors for
* each of the detectable members of the ISO 2022 family
* of encodings.
*
* The separate classes are nested within this class.
*
* @internal
*/
class CharsetRecog_2022 : public CharsetRecognizer
{
public:
virtual ~CharsetRecog_2022() = 0;
protected:
/**
* Matching function shared among the 2022 detectors JP, CN and KR
* Counts up the number of legal an unrecognized escape sequences in
* the sample of text, and computes a score based on the total number &
* the proportion that fit the encoding.
*
*
* @param text the byte buffer containing text to analyse
* @param textLen the size of the text in the byte.
* @param escapeSequences the byte escape sequences to test for.
* @return match quality, in the range of 0-100.
*/
int32_t match_2022(const uint8_t *text,
int32_t textLen,
const uint8_t escapeSequences[][5],
int32_t escapeSequences_length) const;
};
class CharsetRecog_2022JP :public CharsetRecog_2022
{
public:
virtual ~CharsetRecog_2022JP();
const char *getName() const override;
UBool match(InputText *textIn, CharsetMatch *results) const override;
};
#if !UCONFIG_ONLY_HTML_CONVERSION
class CharsetRecog_2022KR :public CharsetRecog_2022 {
public:
virtual ~CharsetRecog_2022KR();
const char *getName() const override;
UBool match(InputText *textIn, CharsetMatch *results) const override;
};
class CharsetRecog_2022CN :public CharsetRecog_2022
{
public:
virtual ~CharsetRecog_2022CN();
const char* getName() const override;
UBool match(InputText *textIn, CharsetMatch *results) const override;
};
#endif
U_NAMESPACE_END
#endif
#endif /* __CSR2022_H */
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