AppPkg/Applications/Python/Python-2.7.10/Modules/cjkcodecs/_codecs_cn.c

   1 /*
   2  * _codecs_cn.c: Codecs collection for Mainland Chinese encodings
   3  *
   4  * Written by Hye-Shik Chang <perky@FreeBSD.org>
   5  */
   6
   7 #include "cjkcodecs.h"
   8 #include "mappings_cn.h"
   9
  10 /**
  11  * hz is predefined as 100 on AIX. So we undefine it to avoid
  12  * conflict against hz codec's.
  13  */
  14 #ifdef _AIX
  15 #undef hz
  16 #endif
  17
  18 /* GBK and GB2312 map differently in few code points that are listed below:
  19  *
  20  *              gb2312                          gbk
  21  * A1A4         U+30FB KATAKANA MIDDLE DOT      U+00B7 MIDDLE DOT
  22  * A1AA         U+2015 HORIZONTAL BAR           U+2014 EM DASH
  23  * A844         undefined                       U+2015 HORIZONTAL BAR
  24  */
  25
  26 #define GBK_DECODE(dc1, dc2, assi) \
  27     if ((dc1) == 0xa1 && (dc2) == 0xaa) (assi) = 0x2014; \
  28     else if ((dc1) == 0xa8 && (dc2) == 0x44) (assi) = 0x2015; \
  29     else if ((dc1) == 0xa1 && (dc2) == 0xa4) (assi) = 0x00b7; \
  30     else TRYMAP_DEC(gb2312, assi, dc1 ^ 0x80, dc2 ^ 0x80); \
  31     else TRYMAP_DEC(gbkext, assi, dc1, dc2);
  32
  33 #define GBK_ENCODE(code, assi) \
  34     if ((code) == 0x2014) (assi) = 0xa1aa; \
  35     else if ((code) == 0x2015) (assi) = 0xa844; \
  36     else if ((code) == 0x00b7) (assi) = 0xa1a4; \
  37     else if ((code) != 0x30fb && TRYMAP_ENC_COND(gbcommon, assi, code));
  38
  39 /*
  40  * GB2312 codec
  41  */
  42
  43 ENCODER(gb2312)
  44 {
  45     while (inleft > 0) {
  46         Py_UNICODE c = IN1;
  47         DBCHAR code;
  48
  49         if (c < 0x80) {
  50             WRITE1((unsigned char)c)
  51             NEXT(1, 1)
  52             continue;
  53         }
  54         UCS4INVALID(c)
  55
  56         REQUIRE_OUTBUF(2)
  57         TRYMAP_ENC(gbcommon, code, c);
  58         else return 1;
  59
  60         if (code & 0x8000) /* MSB set: GBK */
  61             return 1;
  62
  63         OUT1((code >> 8) | 0x80)
  64         OUT2((code & 0xFF) | 0x80)
  65         NEXT(1, 2)
  66     }
  67
  68     return 0;
  69 }
  70
  71 DECODER(gb2312)
  72 {
  73     while (inleft > 0) {
  74         unsigned char c = **inbuf;
  75
  76         REQUIRE_OUTBUF(1)
  77
  78         if (c < 0x80) {
  79             OUT1(c)
  80             NEXT(1, 1)
  81             continue;
  82         }
  83
  84         REQUIRE_INBUF(2)
  85         TRYMAP_DEC(gb2312, **outbuf, c ^ 0x80, IN2 ^ 0x80) {
  86             NEXT(2, 1)
  87         }
  88         else return 2;
  89     }
  90
  91     return 0;
  92 }
  93
  94
  95 /*
  96  * GBK codec
  97  */
  98
  99 ENCODER(gbk)
 100 {
 101     while (inleft > 0) {
 102         Py_UNICODE c = IN1;
 103         DBCHAR code;
 104
 105         if (c < 0x80) {
 106             WRITE1((unsigned char)c)
 107             NEXT(1, 1)
 108             continue;
 109         }
 110         UCS4INVALID(c)
 111
 112         REQUIRE_OUTBUF(2)
 113
 114         GBK_ENCODE(c, code)
 115         else return 1;
 116
 117         OUT1((code >> 8) | 0x80)
 118         if (code & 0x8000)
 119             OUT2((code & 0xFF)) /* MSB set: GBK */
 120         else
 121             OUT2((code & 0xFF) | 0x80) /* MSB unset: GB2312 */
 122         NEXT(1, 2)
 123     }
 124
 125     return 0;
 126 }
 127
 128 DECODER(gbk)
 129 {
 130     while (inleft > 0) {
 131         unsigned char c = IN1;
 132
 133         REQUIRE_OUTBUF(1)
 134
 135         if (c < 0x80) {
 136             OUT1(c)
 137             NEXT(1, 1)
 138             continue;
 139         }
 140
 141         REQUIRE_INBUF(2)
 142
 143         GBK_DECODE(c, IN2, **outbuf)
 144         else return 2;
 145
 146         NEXT(2, 1)
 147     }
 148
 149     return 0;
 150 }
 151
 152
 153 /*
 154  * GB18030 codec
 155  */
 156
 157 ENCODER(gb18030)
 158 {
 159     while (inleft > 0) {
 160         ucs4_t c = IN1;
 161         DBCHAR code;
 162
 163         if (c < 0x80) {
 164             WRITE1(c)
 165             NEXT(1, 1)
 166             continue;
 167         }
 168
 169         DECODE_SURROGATE(c)
 170         if (c > 0x10FFFF)
 171 #if Py_UNICODE_SIZE == 2
 172             return 2; /* surrogates pair */
 173 #else
 174             return 1;
 175 #endif
 176         else if (c >= 0x10000) {
 177             ucs4_t tc = c - 0x10000;
 178
 179             REQUIRE_OUTBUF(4)
 180
 181             OUT4((unsigned char)(tc % 10) + 0x30)
 182             tc /= 10;
 183             OUT3((unsigned char)(tc % 126) + 0x81)
 184             tc /= 126;
 185             OUT2((unsigned char)(tc % 10) + 0x30)
 186             tc /= 10;
 187             OUT1((unsigned char)(tc + 0x90))
 188
 189 #if Py_UNICODE_SIZE == 2
 190             NEXT(2, 4) /* surrogates pair */
 191 #else
 192             NEXT(1, 4)
 193 #endif
 194             continue;
 195         }
 196
 197         REQUIRE_OUTBUF(2)
 198
 199         GBK_ENCODE(c, code)
 200         else TRYMAP_ENC(gb18030ext, code, c);
 201         else {
 202             const struct _gb18030_to_unibmp_ranges *utrrange;
 203
 204             REQUIRE_OUTBUF(4)
 205
 206             for (utrrange = gb18030_to_unibmp_ranges;
 207                  utrrange->first != 0;
 208                  utrrange++)
 209                 if (utrrange->first <= c &&
 210                     c <= utrrange->last) {
 211                     Py_UNICODE tc;
 212
 213                     tc = c - utrrange->first +
 214                          utrrange->base;
 215
 216                     OUT4((unsigned char)(tc % 10) + 0x30)
 217                     tc /= 10;
 218                     OUT3((unsigned char)(tc % 126) + 0x81)
 219                     tc /= 126;
 220                     OUT2((unsigned char)(tc % 10) + 0x30)
 221                     tc /= 10;
 222                     OUT1((unsigned char)tc + 0x81)
 223
 224                     NEXT(1, 4)
 225                     break;
 226                 }
 227
 228             if (utrrange->first == 0)
 229                 return 1;
 230             continue;
 231         }
 232
 233         OUT1((code >> 8) | 0x80)
 234         if (code & 0x8000)
 235             OUT2((code & 0xFF)) /* MSB set: GBK or GB18030ext */
 236         else
 237             OUT2((code & 0xFF) | 0x80) /* MSB unset: GB2312 */
 238
 239         NEXT(1, 2)
 240     }
 241
 242     return 0;
 243 }
 244
 245 DECODER(gb18030)
 246 {
 247     while (inleft > 0) {
 248         unsigned char c = IN1, c2;
 249
 250         REQUIRE_OUTBUF(1)
 251
 252         if (c < 0x80) {
 253             OUT1(c)
 254             NEXT(1, 1)
 255             continue;
 256         }
 257
 258         REQUIRE_INBUF(2)
 259
 260         c2 = IN2;
 261         if (c2 >= 0x30 && c2 <= 0x39) { /* 4 bytes seq */
 262             const struct _gb18030_to_unibmp_ranges *utr;
 263             unsigned char c3, c4;
 264             ucs4_t lseq;
 265
 266             REQUIRE_INBUF(4)
 267             c3 = IN3;
 268             c4 = IN4;
 269             if (c < 0x81 || c3 < 0x81 || c4 < 0x30 || c4 > 0x39)
 270                 return 4;
 271             c -= 0x81;  c2 -= 0x30;
 272             c3 -= 0x81; c4 -= 0x30;
 273
 274             if (c < 4) { /* U+0080 - U+FFFF */
 275                 lseq = ((ucs4_t)c * 10 + c2) * 1260 +
 276                     (ucs4_t)c3 * 10 + c4;
 277                 if (lseq < 39420) {
 278                     for (utr = gb18030_to_unibmp_ranges;
 279                          lseq >= (utr + 1)->base;
 280                          utr++) ;
 281                     OUT1(utr->first - utr->base + lseq)
 282                     NEXT(4, 1)
 283                     continue;
 284                 }
 285             }
 286             else if (c >= 15) { /* U+10000 - U+10FFFF */
 287                 lseq = 0x10000 + (((ucs4_t)c-15) * 10 + c2)
 288                     * 1260 + (ucs4_t)c3 * 10 + c4;
 289                 if (lseq <= 0x10FFFF) {
 290                     WRITEUCS4(lseq);
 291                     NEXT_IN(4)
 292                     continue;
 293                 }
 294             }
 295             return 4;
 296         }
 297
 298         GBK_DECODE(c, c2, **outbuf)
 299         else TRYMAP_DEC(gb18030ext, **outbuf, c, c2);
 300         else return 2;
 301
 302         NEXT(2, 1)
 303     }
 304
 305     return 0;
 306 }
 307
 308
 309 /*
 310  * HZ codec
 311  */
 312
 313 ENCODER_INIT(hz)
 314 {
 315     state->i = 0;
 316     return 0;
 317 }
 318
 319 ENCODER_RESET(hz)
 320 {
 321     if (state->i != 0) {
 322         WRITE2('~', '}')
 323         state->i = 0;
 324         NEXT_OUT(2)
 325     }
 326     return 0;
 327 }
 328
 329 ENCODER(hz)
 330 {
 331     while (inleft > 0) {
 332         Py_UNICODE c = IN1;
 333         DBCHAR code;
 334
 335         if (c < 0x80) {
 336             if (state->i == 0) {
 337                 WRITE1((unsigned char)c)
 338                 NEXT(1, 1)
 339             }
 340             else {
 341                 WRITE3('~', '}', (unsigned char)c)
 342                 NEXT(1, 3)
 343                 state->i = 0;
 344             }
 345             continue;
 346         }
 347
 348         UCS4INVALID(c)
 349
 350         TRYMAP_ENC(gbcommon, code, c);
 351         else return 1;
 352
 353         if (code & 0x8000) /* MSB set: GBK */
 354             return 1;
 355
 356         if (state->i == 0) {
 357             WRITE4('~', '{', code >> 8, code & 0xff)
 358             NEXT(1, 4)
 359             state->i = 1;
 360         }
 361         else {
 362             WRITE2(code >> 8, code & 0xff)
 363             NEXT(1, 2)
 364         }
 365     }
 366
 367     return 0;
 368 }
 369
 370 DECODER_INIT(hz)
 371 {
 372     state->i = 0;
 373     return 0;
 374 }
 375
 376 DECODER_RESET(hz)
 377 {
 378     state->i = 0;
 379     return 0;
 380 }
 381
 382 DECODER(hz)
 383 {
 384     while (inleft > 0) {
 385         unsigned char c = IN1;
 386
 387         if (c == '~') {
 388             unsigned char c2 = IN2;
 389
 390             REQUIRE_INBUF(2)
 391             if (c2 == '~') {
 392                 WRITE1('~')
 393                 NEXT(2, 1)
 394                 continue;
 395             }
 396             else if (c2 == '{' && state->i == 0)
 397                 state->i = 1; /* set GB */
 398             else if (c2 == '}' && state->i == 1)
 399                 state->i = 0; /* set ASCII */
 400             else if (c2 == '\n')
 401                 ; /* line-continuation */
 402             else
 403                 return 2;
 404             NEXT(2, 0);
 405             continue;
 406         }
 407
 408         if (c & 0x80)
 409             return 1;
 410
 411         if (state->i == 0) { /* ASCII mode */
 412             WRITE1(c)
 413             NEXT(1, 1)
 414         }
 415         else { /* GB mode */
 416             REQUIRE_INBUF(2)
 417             REQUIRE_OUTBUF(1)
 418             TRYMAP_DEC(gb2312, **outbuf, c, IN2) {
 419                 NEXT(2, 1)
 420             }
 421             else
 422                 return 2;
 423         }
 424     }
 425
 426     return 0;
 427 }
 428
 429
 430 BEGIN_MAPPINGS_LIST
 431   MAPPING_DECONLY(gb2312)
 432   MAPPING_DECONLY(gbkext)
 433   MAPPING_ENCONLY(gbcommon)
 434   MAPPING_ENCDEC(gb18030ext)
 435 END_MAPPINGS_LIST
 436
 437 BEGIN_CODECS_LIST
 438   CODEC_STATELESS(gb2312)
 439   CODEC_STATELESS(gbk)
 440   CODEC_STATELESS(gb18030)
 441   CODEC_STATEFUL(hz)
 442 END_CODECS_LIST
 443
 444 I_AM_A_MODULE_FOR(cn)