Victor Chang | 7322950 | 2020-09-17 13:39:19 +0100 | [diff] [blame] | 1 | // © 2016 and later: Unicode, Inc. and others. |
| 2 | // License & terms of use: http://www.unicode.org/copyright.html |
| 3 | /* |
| 4 | ********************************************************************** |
| 5 | * Copyright (C) 2005-2015, International Business Machines |
| 6 | * Corporation and others. All Rights Reserved. |
| 7 | ********************************************************************** |
| 8 | */ |
| 9 | |
| 10 | #ifndef __CSRSBCS_H |
| 11 | #define __CSRSBCS_H |
| 12 | |
| 13 | #include "unicode/uobject.h" |
| 14 | |
| 15 | #if !UCONFIG_NO_CONVERSION |
| 16 | |
| 17 | #include "csrecog.h" |
| 18 | |
| 19 | U_NAMESPACE_BEGIN |
| 20 | |
| 21 | class NGramParser : public UMemory |
| 22 | { |
| 23 | private: |
| 24 | int32_t ngram; |
| 25 | const int32_t *ngramList; |
| 26 | |
| 27 | int32_t ngramCount; |
| 28 | int32_t hitCount; |
| 29 | |
| 30 | protected: |
| 31 | int32_t byteIndex; |
| 32 | const uint8_t *charMap; |
| 33 | |
| 34 | void addByte(int32_t b); |
| 35 | |
| 36 | public: |
| 37 | NGramParser(const int32_t *theNgramList, const uint8_t *theCharMap); |
| 38 | virtual ~NGramParser(); |
| 39 | |
| 40 | private: |
| 41 | /* |
| 42 | * Binary search for value in table, which must have exactly 64 entries. |
| 43 | */ |
| 44 | int32_t search(const int32_t *table, int32_t value); |
| 45 | |
| 46 | void lookup(int32_t thisNgram); |
| 47 | |
| 48 | virtual int32_t nextByte(InputText *det); |
| 49 | virtual void parseCharacters(InputText *det); |
| 50 | |
| 51 | public: |
| 52 | int32_t parse(InputText *det); |
| 53 | |
| 54 | }; |
| 55 | |
| 56 | #if !UCONFIG_ONLY_HTML_CONVERSION |
| 57 | class NGramParser_IBM420 : public NGramParser |
| 58 | { |
| 59 | public: |
| 60 | NGramParser_IBM420(const int32_t *theNgramList, const uint8_t *theCharMap); |
| 61 | ~NGramParser_IBM420(); |
| 62 | |
| 63 | private: |
| 64 | int32_t alef; |
| 65 | int32_t isLamAlef(int32_t b); |
| 66 | int32_t nextByte(InputText *det); |
| 67 | void parseCharacters(InputText *det); |
| 68 | }; |
| 69 | #endif |
| 70 | |
| 71 | |
| 72 | class CharsetRecog_sbcs : public CharsetRecognizer |
| 73 | { |
| 74 | public: |
| 75 | CharsetRecog_sbcs(); |
| 76 | virtual ~CharsetRecog_sbcs(); |
| 77 | virtual const char *getName() const = 0; |
| 78 | virtual UBool match(InputText *det, CharsetMatch *results) const = 0; |
| 79 | virtual int32_t match_sbcs(InputText *det, const int32_t ngrams[], const uint8_t charMap[]) const; |
| 80 | }; |
| 81 | |
| 82 | class CharsetRecog_8859_1 : public CharsetRecog_sbcs |
| 83 | { |
| 84 | public: |
| 85 | virtual ~CharsetRecog_8859_1(); |
| 86 | const char *getName() const; |
| 87 | virtual UBool match(InputText *det, CharsetMatch *results) const; |
| 88 | }; |
| 89 | |
| 90 | class CharsetRecog_8859_2 : public CharsetRecog_sbcs |
| 91 | { |
| 92 | public: |
| 93 | virtual ~CharsetRecog_8859_2(); |
| 94 | const char *getName() const; |
| 95 | virtual UBool match(InputText *det, CharsetMatch *results) const; |
| 96 | }; |
| 97 | |
| 98 | class CharsetRecog_8859_5 : public CharsetRecog_sbcs |
| 99 | { |
| 100 | public: |
| 101 | virtual ~CharsetRecog_8859_5(); |
| 102 | const char *getName() const; |
| 103 | }; |
| 104 | |
| 105 | class CharsetRecog_8859_6 : public CharsetRecog_sbcs |
| 106 | { |
| 107 | public: |
| 108 | virtual ~CharsetRecog_8859_6(); |
| 109 | |
| 110 | const char *getName() const; |
| 111 | }; |
| 112 | |
| 113 | class CharsetRecog_8859_7 : public CharsetRecog_sbcs |
| 114 | { |
| 115 | public: |
| 116 | virtual ~CharsetRecog_8859_7(); |
| 117 | |
| 118 | const char *getName() const; |
| 119 | }; |
| 120 | |
| 121 | class CharsetRecog_8859_8 : public CharsetRecog_sbcs |
| 122 | { |
| 123 | public: |
| 124 | virtual ~CharsetRecog_8859_8(); |
| 125 | |
| 126 | virtual const char *getName() const; |
| 127 | }; |
| 128 | |
| 129 | class CharsetRecog_8859_9 : public CharsetRecog_sbcs |
| 130 | { |
| 131 | public: |
| 132 | virtual ~CharsetRecog_8859_9(); |
| 133 | |
| 134 | const char *getName() const; |
| 135 | }; |
| 136 | |
| 137 | |
| 138 | |
| 139 | class CharsetRecog_8859_5_ru : public CharsetRecog_8859_5 |
| 140 | { |
| 141 | public: |
| 142 | virtual ~CharsetRecog_8859_5_ru(); |
| 143 | |
| 144 | const char *getLanguage() const; |
| 145 | |
| 146 | virtual UBool match(InputText *det, CharsetMatch *results) const; |
| 147 | }; |
| 148 | |
| 149 | class CharsetRecog_8859_6_ar : public CharsetRecog_8859_6 |
| 150 | { |
| 151 | public: |
| 152 | virtual ~CharsetRecog_8859_6_ar(); |
| 153 | |
| 154 | const char *getLanguage() const; |
| 155 | |
| 156 | virtual UBool match(InputText *det, CharsetMatch *results) const; |
| 157 | }; |
| 158 | |
| 159 | class CharsetRecog_8859_7_el : public CharsetRecog_8859_7 |
| 160 | { |
| 161 | public: |
| 162 | virtual ~CharsetRecog_8859_7_el(); |
| 163 | |
| 164 | const char *getLanguage() const; |
| 165 | |
| 166 | virtual UBool match(InputText *det, CharsetMatch *results) const; |
| 167 | }; |
| 168 | |
| 169 | class CharsetRecog_8859_8_I_he : public CharsetRecog_8859_8 |
| 170 | { |
| 171 | public: |
| 172 | virtual ~CharsetRecog_8859_8_I_he(); |
| 173 | |
| 174 | const char *getName() const; |
| 175 | |
| 176 | const char *getLanguage() const; |
| 177 | |
| 178 | virtual UBool match(InputText *det, CharsetMatch *results) const; |
| 179 | }; |
| 180 | |
| 181 | class CharsetRecog_8859_8_he : public CharsetRecog_8859_8 |
| 182 | { |
| 183 | public: |
| 184 | virtual ~CharsetRecog_8859_8_he (); |
| 185 | |
| 186 | const char *getLanguage() const; |
| 187 | |
| 188 | virtual UBool match(InputText *det, CharsetMatch *results) const; |
| 189 | }; |
| 190 | |
| 191 | class CharsetRecog_8859_9_tr : public CharsetRecog_8859_9 |
| 192 | { |
| 193 | public: |
| 194 | virtual ~CharsetRecog_8859_9_tr (); |
| 195 | |
| 196 | const char *getLanguage() const; |
| 197 | |
| 198 | virtual UBool match(InputText *det, CharsetMatch *results) const; |
| 199 | }; |
| 200 | |
| 201 | class CharsetRecog_windows_1256 : public CharsetRecog_sbcs |
| 202 | { |
| 203 | public: |
| 204 | virtual ~CharsetRecog_windows_1256(); |
| 205 | |
| 206 | const char *getName() const; |
| 207 | |
| 208 | const char *getLanguage() const; |
| 209 | |
| 210 | virtual UBool match(InputText *det, CharsetMatch *results) const; |
| 211 | }; |
| 212 | |
| 213 | class CharsetRecog_windows_1251 : public CharsetRecog_sbcs |
| 214 | { |
| 215 | public: |
| 216 | virtual ~CharsetRecog_windows_1251(); |
| 217 | |
| 218 | const char *getName() const; |
| 219 | |
| 220 | const char *getLanguage() const; |
| 221 | |
| 222 | virtual UBool match(InputText *det, CharsetMatch *results) const; |
| 223 | }; |
| 224 | |
| 225 | |
| 226 | class CharsetRecog_KOI8_R : public CharsetRecog_sbcs |
| 227 | { |
| 228 | public: |
| 229 | virtual ~CharsetRecog_KOI8_R(); |
| 230 | |
| 231 | const char *getName() const; |
| 232 | |
| 233 | const char *getLanguage() const; |
| 234 | |
| 235 | virtual UBool match(InputText *det, CharsetMatch *results) const; |
| 236 | }; |
| 237 | |
| 238 | #if !UCONFIG_ONLY_HTML_CONVERSION |
| 239 | class CharsetRecog_IBM424_he : public CharsetRecog_sbcs |
| 240 | { |
| 241 | public: |
| 242 | virtual ~CharsetRecog_IBM424_he(); |
| 243 | |
| 244 | const char *getLanguage() const; |
| 245 | }; |
| 246 | |
| 247 | class CharsetRecog_IBM424_he_rtl : public CharsetRecog_IBM424_he { |
| 248 | public: |
| 249 | virtual ~CharsetRecog_IBM424_he_rtl(); |
| 250 | |
| 251 | const char *getName() const; |
| 252 | |
| 253 | virtual UBool match(InputText *det, CharsetMatch *results) const; |
| 254 | }; |
| 255 | |
| 256 | class CharsetRecog_IBM424_he_ltr : public CharsetRecog_IBM424_he { |
| 257 | virtual ~CharsetRecog_IBM424_he_ltr(); |
| 258 | |
| 259 | const char *getName() const; |
| 260 | |
| 261 | virtual UBool match(InputText *det, CharsetMatch *results) const; |
| 262 | }; |
| 263 | |
| 264 | class CharsetRecog_IBM420_ar : public CharsetRecog_sbcs |
| 265 | { |
| 266 | public: |
| 267 | virtual ~CharsetRecog_IBM420_ar(); |
| 268 | |
| 269 | const char *getLanguage() const; |
| 270 | int32_t match_sbcs(InputText *det, const int32_t ngrams[], const uint8_t charMap[]) const; |
| 271 | |
| 272 | }; |
| 273 | |
| 274 | class CharsetRecog_IBM420_ar_rtl : public CharsetRecog_IBM420_ar { |
| 275 | public: |
| 276 | virtual ~CharsetRecog_IBM420_ar_rtl(); |
| 277 | |
| 278 | const char *getName() const; |
| 279 | |
| 280 | virtual UBool match(InputText *det, CharsetMatch *results) const; |
| 281 | }; |
| 282 | |
| 283 | class CharsetRecog_IBM420_ar_ltr : public CharsetRecog_IBM420_ar { |
| 284 | virtual ~CharsetRecog_IBM420_ar_ltr(); |
| 285 | |
| 286 | const char *getName() const; |
| 287 | |
| 288 | virtual UBool match(InputText *det, CharsetMatch *results) const; |
| 289 | }; |
| 290 | #endif |
| 291 | |
| 292 | U_NAMESPACE_END |
| 293 | |
| 294 | #endif /* !UCONFIG_NO_CONVERSION */ |
| 295 | #endif /* __CSRSBCS_H */ |