87 lines
2.1 KiB
C++
87 lines
2.1 KiB
C++
/*
|
|
**********************************************************************
|
|
* Copyright (C) 2005-2006, 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 CharsetRecog_2022 part of the ICU charset detection imlementation.
|
|
* 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);
|
|
|
|
};
|
|
|
|
class CharsetRecog_2022JP :public CharsetRecog_2022
|
|
{
|
|
public:
|
|
virtual ~CharsetRecog_2022JP() {}
|
|
|
|
const char *getName() const;
|
|
|
|
int32_t match(InputText *textIn);
|
|
};
|
|
|
|
class CharsetRecog_2022KR :public CharsetRecog_2022 {
|
|
public:
|
|
virtual ~CharsetRecog_2022KR() {}
|
|
|
|
const char *getName() const;
|
|
|
|
int32_t match(InputText *textIn);
|
|
|
|
};
|
|
|
|
class CharsetRecog_2022CN :public CharsetRecog_2022
|
|
{
|
|
public:
|
|
virtual ~CharsetRecog_2022CN() {}
|
|
|
|
const char* getName() const;
|
|
|
|
int32_t match(InputText *textIn);
|
|
};
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif
|
|
#endif /* __CSR2022_H */
|