The Tor Browser: intl/icu/source/i18n/csr2022.h@fc2d59ddac77

     1 /*

     2  **********************************************************************

     3  *   Copyright (C) 2005-2012, International Business Machines

     4  *   Corporation and others.  All Rights Reserved.

     5  **********************************************************************

     6  */

     8 #ifndef __CSR2022_H

     9 #define __CSR2022_H

    11 #include "unicode/utypes.h"

    13 #if !UCONFIG_NO_CONVERSION

    15 #include "csrecog.h"

    17 U_NAMESPACE_BEGIN

    19 class CharsetMatch;

    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 {

    34 public:

    35     virtual ~CharsetRecog_2022() = 0;

    37 protected:

    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;

    56 };

    58 class CharsetRecog_2022JP :public CharsetRecog_2022

    59 {

    60 public:

    61     virtual ~CharsetRecog_2022JP();

    63     const char *getName() const;

    65     UBool match(InputText *textIn, CharsetMatch *results) const;

    66 };

    68 class CharsetRecog_2022KR :public CharsetRecog_2022 {

    69 public:

    70     virtual ~CharsetRecog_2022KR();

    72     const char *getName() const;

    74     UBool match(InputText *textIn, CharsetMatch *results) const;

    76 };

    78 class CharsetRecog_2022CN :public CharsetRecog_2022

    79 {

    80 public:

    81     virtual ~CharsetRecog_2022CN();

    83     const char* getName() const;

    85     UBool match(InputText *textIn, CharsetMatch *results) const;

    86 };

    88 U_NAMESPACE_END

    90 #endif

    91 #endif /* __CSR2022_H */

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