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Commit	Line	Data
	1	/*
	2	**********************************************************************
	3	* Copyright (C) 2005-2012, International Business Machines
	4	* Corporation and others. All Rights Reserved.
	5	**********************************************************************
	6	*/
	7
	8	#ifndef __CSR2022_H
	9	#define __CSR2022_H
	10
	11	#include "unicode/utypes.h"
	12
	13	#if !UCONFIG_NO_CONVERSION
	14
	15	#include "csrecog.h"
	16
	17	U_NAMESPACE_BEGIN
	18
	19	class CharsetMatch;
	20
	21	/**
	22	* class CharsetRecog_2022 part of the ICU charset detection imlementation.
	23	* This is a superclass for the individual detectors for
	24	* each of the detectable members of the ISO 2022 family
	25	* of encodings.
	26	*
	27	* The separate classes are nested within this class.
	28	*
	29	* @internal
	30	*/
	31	class CharsetRecog_2022 : public CharsetRecognizer
	32	{
	33
	34	public:
	35	virtual ~CharsetRecog_2022() = 0;
	36
	37	protected:
	38
	39	/**
	40	* Matching function shared among the 2022 detectors JP, CN and KR
	41	* Counts up the number of legal an unrecognized escape sequences in
	42	* the sample of text, and computes a score based on the total number &
	43	* the proportion that fit the encoding.
	44	*
	45	*
	46	* @param text the byte buffer containing text to analyse
	47	* @param textLen the size of the text in the byte.
	48	* @param escapeSequences the byte escape sequences to test for.
	49	* @return match quality, in the range of 0-100.
	50	*/
	51	int32_t match_2022(const uint8_t *text,
	52	int32_t textLen,
	53	const uint8_t escapeSequences[][5],
	54	int32_t escapeSequences_length) const;
	55
	56	};
	57
	58	class CharsetRecog_2022JP :public CharsetRecog_2022
	59	{
	60	public:
	61	virtual ~CharsetRecog_2022JP();
	62
	63	const char *getName() const;
	64
	65	UBool match(InputText textIn, CharsetMatch results) const;
	66	};
	67
	68	class CharsetRecog_2022KR :public CharsetRecog_2022 {
	69	public:
	70	virtual ~CharsetRecog_2022KR();
	71
	72	const char *getName() const;
	73
	74	UBool match(InputText textIn, CharsetMatch results) const;
	75
	76	};
	77
	78	class CharsetRecog_2022CN :public CharsetRecog_2022
	79	{
	80	public:
	81	virtual ~CharsetRecog_2022CN();
	82
	83	const char* getName() const;
	84
	85	UBool match(InputText textIn, CharsetMatch results) const;
	86	};
	87
	88	U_NAMESPACE_END
	89
	90	#endif
	91	#endif /* __CSR2022_H */