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comparison: intl/icu/source/i18n/csr2022.h
intl/icu/source/i18n/csr2022.h
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| 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 */ |
