lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Simple transformations functions. |
| 2 | Copyright (C) 1997-2015 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include <byteswap.h> |
| 21 | #include <dlfcn.h> |
| 22 | #include <endian.h> |
| 23 | #include <errno.h> |
| 24 | #include <gconv.h> |
| 25 | #include <stdint.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <string.h> |
| 28 | #include <wchar.h> |
| 29 | #include <sys/param.h> |
| 30 | #include <gconv_int.h> |
| 31 | |
| 32 | #define BUILTIN_ALIAS(s1, s2) /* nothing */ |
| 33 | #define BUILTIN_TRANSFORMATION(From, To, Cost, Name, Fct, BtowcFct, \ |
| 34 | MinF, MaxF, MinT, MaxT) \ |
| 35 | extern int Fct (struct __gconv_step *, struct __gconv_step_data *, \ |
| 36 | const unsigned char **, const unsigned char *, \ |
| 37 | unsigned char **, size_t *, int, int); |
| 38 | #include "gconv_builtin.h" |
| 39 | |
| 40 | |
| 41 | #ifndef EILSEQ |
| 42 | # define EILSEQ EINVAL |
| 43 | #endif |
| 44 | |
| 45 | |
| 46 | /* Specialized conversion function for a single byte to INTERNAL, recognizing |
| 47 | only ASCII characters. */ |
| 48 | wint_t |
| 49 | __gconv_btwoc_ascii (struct __gconv_step *step, unsigned char c) |
| 50 | { |
| 51 | if (c < 0x80) |
| 52 | return c; |
| 53 | else |
| 54 | return WEOF; |
| 55 | } |
| 56 | |
| 57 | |
| 58 | /* Transform from the internal, UCS4-like format, to UCS4. The |
| 59 | difference between the internal ucs4 format and the real UCS4 |
| 60 | format is, if any, the endianess. The Unicode/ISO 10646 says that |
| 61 | unless some higher protocol specifies it differently, the byte |
| 62 | order is big endian.*/ |
| 63 | #define DEFINE_INIT 0 |
| 64 | #define DEFINE_FINI 0 |
| 65 | #define MIN_NEEDED_FROM 4 |
| 66 | #define MIN_NEEDED_TO 4 |
| 67 | #define FROM_DIRECTION 1 |
| 68 | #define FROM_LOOP internal_ucs4_loop |
| 69 | #define TO_LOOP internal_ucs4_loop /* This is not used. */ |
| 70 | #define FUNCTION_NAME __gconv_transform_internal_ucs4 |
| 71 | #define ONE_DIRECTION 0 |
| 72 | |
| 73 | |
| 74 | static inline int |
| 75 | __attribute ((always_inline)) |
| 76 | internal_ucs4_loop (struct __gconv_step *step, |
| 77 | struct __gconv_step_data *step_data, |
| 78 | const unsigned char **inptrp, const unsigned char *inend, |
| 79 | unsigned char **outptrp, unsigned char *outend, |
| 80 | size_t *irreversible) |
| 81 | { |
| 82 | const unsigned char *inptr = *inptrp; |
| 83 | unsigned char *outptr = *outptrp; |
| 84 | size_t n_convert = MIN (inend - inptr, outend - outptr) / 4; |
| 85 | int result; |
| 86 | |
| 87 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 88 | /* Sigh, we have to do some real work. */ |
| 89 | size_t cnt; |
| 90 | uint32_t *outptr32 = (uint32_t *) outptr; |
| 91 | |
| 92 | for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4) |
| 93 | *outptr32++ = bswap_32 (*(const uint32_t *) inptr); |
| 94 | |
| 95 | *inptrp = inptr; |
| 96 | *outptrp = (unsigned char *) outptr32; |
| 97 | #elif __BYTE_ORDER == __BIG_ENDIAN |
| 98 | /* Simply copy the data. */ |
| 99 | *inptrp = inptr + n_convert * 4; |
| 100 | *outptrp = __mempcpy (outptr, inptr, n_convert * 4); |
| 101 | #else |
| 102 | # error "This endianess is not supported." |
| 103 | #endif |
| 104 | |
| 105 | /* Determine the status. */ |
| 106 | if (*inptrp == inend) |
| 107 | result = __GCONV_EMPTY_INPUT; |
| 108 | else if (*outptrp + 4 > outend) |
| 109 | result = __GCONV_FULL_OUTPUT; |
| 110 | else |
| 111 | result = __GCONV_INCOMPLETE_INPUT; |
| 112 | |
| 113 | return result; |
| 114 | } |
| 115 | |
| 116 | #if !_STRING_ARCH_unaligned |
| 117 | static inline int |
| 118 | __attribute ((always_inline)) |
| 119 | internal_ucs4_loop_unaligned (struct __gconv_step *step, |
| 120 | struct __gconv_step_data *step_data, |
| 121 | const unsigned char **inptrp, |
| 122 | const unsigned char *inend, |
| 123 | unsigned char **outptrp, unsigned char *outend, |
| 124 | size_t *irreversible) |
| 125 | { |
| 126 | const unsigned char *inptr = *inptrp; |
| 127 | unsigned char *outptr = *outptrp; |
| 128 | size_t n_convert = MIN (inend - inptr, outend - outptr) / 4; |
| 129 | int result; |
| 130 | |
| 131 | # if __BYTE_ORDER == __LITTLE_ENDIAN |
| 132 | /* Sigh, we have to do some real work. */ |
| 133 | size_t cnt; |
| 134 | |
| 135 | for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4, outptr += 4) |
| 136 | { |
| 137 | outptr[0] = inptr[3]; |
| 138 | outptr[1] = inptr[2]; |
| 139 | outptr[2] = inptr[1]; |
| 140 | outptr[3] = inptr[0]; |
| 141 | } |
| 142 | |
| 143 | *inptrp = inptr; |
| 144 | *outptrp = outptr; |
| 145 | # elif __BYTE_ORDER == __BIG_ENDIAN |
| 146 | /* Simply copy the data. */ |
| 147 | *inptrp = inptr + n_convert * 4; |
| 148 | *outptrp = __mempcpy (outptr, inptr, n_convert * 4); |
| 149 | # else |
| 150 | # error "This endianess is not supported." |
| 151 | # endif |
| 152 | |
| 153 | /* Determine the status. */ |
| 154 | if (*inptrp == inend) |
| 155 | result = __GCONV_EMPTY_INPUT; |
| 156 | else if (*outptrp + 4 > outend) |
| 157 | result = __GCONV_FULL_OUTPUT; |
| 158 | else |
| 159 | result = __GCONV_INCOMPLETE_INPUT; |
| 160 | |
| 161 | return result; |
| 162 | } |
| 163 | #endif |
| 164 | |
| 165 | |
| 166 | static inline int |
| 167 | __attribute ((always_inline)) |
| 168 | internal_ucs4_loop_single (struct __gconv_step *step, |
| 169 | struct __gconv_step_data *step_data, |
| 170 | const unsigned char **inptrp, |
| 171 | const unsigned char *inend, |
| 172 | unsigned char **outptrp, unsigned char *outend, |
| 173 | size_t *irreversible) |
| 174 | { |
| 175 | mbstate_t *state = step_data->__statep; |
| 176 | size_t cnt = state->__count & 7; |
| 177 | |
| 178 | while (*inptrp < inend && cnt < 4) |
| 179 | state->__value.__wchb[cnt++] = *(*inptrp)++; |
| 180 | |
| 181 | if (__glibc_unlikely (cnt < 4)) |
| 182 | { |
| 183 | /* Still not enough bytes. Store the ones in the input buffer. */ |
| 184 | state->__count &= ~7; |
| 185 | state->__count |= cnt; |
| 186 | |
| 187 | return __GCONV_INCOMPLETE_INPUT; |
| 188 | } |
| 189 | |
| 190 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 191 | (*outptrp)[0] = state->__value.__wchb[3]; |
| 192 | (*outptrp)[1] = state->__value.__wchb[2]; |
| 193 | (*outptrp)[2] = state->__value.__wchb[1]; |
| 194 | (*outptrp)[3] = state->__value.__wchb[0]; |
| 195 | |
| 196 | #elif __BYTE_ORDER == __BIG_ENDIAN |
| 197 | /* XXX unaligned */ |
| 198 | (*outptrp)[0] = state->__value.__wchb[0]; |
| 199 | (*outptrp)[1] = state->__value.__wchb[1]; |
| 200 | (*outptrp)[2] = state->__value.__wchb[2]; |
| 201 | (*outptrp)[3] = state->__value.__wchb[3]; |
| 202 | #else |
| 203 | # error "This endianess is not supported." |
| 204 | #endif |
| 205 | *outptrp += 4; |
| 206 | |
| 207 | /* Clear the state buffer. */ |
| 208 | state->__count &= ~7; |
| 209 | |
| 210 | return __GCONV_OK; |
| 211 | } |
| 212 | |
| 213 | #include <iconv/skeleton.c> |
| 214 | |
| 215 | |
| 216 | /* Transform from UCS4 to the internal, UCS4-like format. Unlike |
| 217 | for the other direction we have to check for correct values here. */ |
| 218 | #define DEFINE_INIT 0 |
| 219 | #define DEFINE_FINI 0 |
| 220 | #define MIN_NEEDED_FROM 4 |
| 221 | #define MIN_NEEDED_TO 4 |
| 222 | #define FROM_DIRECTION 1 |
| 223 | #define FROM_LOOP ucs4_internal_loop |
| 224 | #define TO_LOOP ucs4_internal_loop /* This is not used. */ |
| 225 | #define FUNCTION_NAME __gconv_transform_ucs4_internal |
| 226 | #define ONE_DIRECTION 0 |
| 227 | |
| 228 | |
| 229 | static inline int |
| 230 | __attribute ((always_inline)) |
| 231 | ucs4_internal_loop (struct __gconv_step *step, |
| 232 | struct __gconv_step_data *step_data, |
| 233 | const unsigned char **inptrp, const unsigned char *inend, |
| 234 | unsigned char **outptrp, unsigned char *outend, |
| 235 | size_t *irreversible) |
| 236 | { |
| 237 | int flags = step_data->__flags; |
| 238 | const unsigned char *inptr = *inptrp; |
| 239 | unsigned char *outptr = *outptrp; |
| 240 | size_t n_convert = MIN (inend - inptr, outend - outptr) / 4; |
| 241 | int result; |
| 242 | size_t cnt; |
| 243 | |
| 244 | for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4) |
| 245 | { |
| 246 | uint32_t inval; |
| 247 | |
| 248 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 249 | inval = bswap_32 (*(const uint32_t *) inptr); |
| 250 | #else |
| 251 | inval = *(const uint32_t *) inptr; |
| 252 | #endif |
| 253 | |
| 254 | if (__glibc_unlikely (inval > 0x7fffffff)) |
| 255 | { |
| 256 | /* The value is too large. We don't try transliteration here since |
| 257 | this is not an error because of the lack of possibilities to |
| 258 | represent the result. This is a genuine bug in the input since |
| 259 | UCS4 does not allow such values. */ |
| 260 | if (irreversible == NULL) |
| 261 | /* We are transliterating, don't try to correct anything. */ |
| 262 | return __GCONV_ILLEGAL_INPUT; |
| 263 | |
| 264 | if (flags & __GCONV_IGNORE_ERRORS) |
| 265 | { |
| 266 | /* Just ignore this character. */ |
| 267 | ++*irreversible; |
| 268 | continue; |
| 269 | } |
| 270 | |
| 271 | *inptrp = inptr; |
| 272 | *outptrp = outptr; |
| 273 | return __GCONV_ILLEGAL_INPUT; |
| 274 | } |
| 275 | |
| 276 | *((uint32_t *) outptr) = inval; |
| 277 | outptr += sizeof (uint32_t); |
| 278 | } |
| 279 | |
| 280 | *inptrp = inptr; |
| 281 | *outptrp = outptr; |
| 282 | |
| 283 | /* Determine the status. */ |
| 284 | if (*inptrp == inend) |
| 285 | result = __GCONV_EMPTY_INPUT; |
| 286 | else if (*outptrp + 4 > outend) |
| 287 | result = __GCONV_FULL_OUTPUT; |
| 288 | else |
| 289 | result = __GCONV_INCOMPLETE_INPUT; |
| 290 | |
| 291 | return result; |
| 292 | } |
| 293 | |
| 294 | #if !_STRING_ARCH_unaligned |
| 295 | static inline int |
| 296 | __attribute ((always_inline)) |
| 297 | ucs4_internal_loop_unaligned (struct __gconv_step *step, |
| 298 | struct __gconv_step_data *step_data, |
| 299 | const unsigned char **inptrp, |
| 300 | const unsigned char *inend, |
| 301 | unsigned char **outptrp, unsigned char *outend, |
| 302 | size_t *irreversible) |
| 303 | { |
| 304 | int flags = step_data->__flags; |
| 305 | const unsigned char *inptr = *inptrp; |
| 306 | unsigned char *outptr = *outptrp; |
| 307 | size_t n_convert = MIN (inend - inptr, outend - outptr) / 4; |
| 308 | int result; |
| 309 | size_t cnt; |
| 310 | |
| 311 | for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4) |
| 312 | { |
| 313 | if (__glibc_unlikely (inptr[0] > 0x80)) |
| 314 | { |
| 315 | /* The value is too large. We don't try transliteration here since |
| 316 | this is not an error because of the lack of possibilities to |
| 317 | represent the result. This is a genuine bug in the input since |
| 318 | UCS4 does not allow such values. */ |
| 319 | if (irreversible == NULL) |
| 320 | /* We are transliterating, don't try to correct anything. */ |
| 321 | return __GCONV_ILLEGAL_INPUT; |
| 322 | |
| 323 | if (flags & __GCONV_IGNORE_ERRORS) |
| 324 | { |
| 325 | /* Just ignore this character. */ |
| 326 | ++*irreversible; |
| 327 | continue; |
| 328 | } |
| 329 | |
| 330 | *inptrp = inptr; |
| 331 | *outptrp = outptr; |
| 332 | return __GCONV_ILLEGAL_INPUT; |
| 333 | } |
| 334 | |
| 335 | # if __BYTE_ORDER == __LITTLE_ENDIAN |
| 336 | outptr[3] = inptr[0]; |
| 337 | outptr[2] = inptr[1]; |
| 338 | outptr[1] = inptr[2]; |
| 339 | outptr[0] = inptr[3]; |
| 340 | # else |
| 341 | outptr[0] = inptr[0]; |
| 342 | outptr[1] = inptr[1]; |
| 343 | outptr[2] = inptr[2]; |
| 344 | outptr[3] = inptr[3]; |
| 345 | # endif |
| 346 | outptr += 4; |
| 347 | } |
| 348 | |
| 349 | *inptrp = inptr; |
| 350 | *outptrp = outptr; |
| 351 | |
| 352 | /* Determine the status. */ |
| 353 | if (*inptrp == inend) |
| 354 | result = __GCONV_EMPTY_INPUT; |
| 355 | else if (*outptrp + 4 > outend) |
| 356 | result = __GCONV_FULL_OUTPUT; |
| 357 | else |
| 358 | result = __GCONV_INCOMPLETE_INPUT; |
| 359 | |
| 360 | return result; |
| 361 | } |
| 362 | #endif |
| 363 | |
| 364 | |
| 365 | static inline int |
| 366 | __attribute ((always_inline)) |
| 367 | ucs4_internal_loop_single (struct __gconv_step *step, |
| 368 | struct __gconv_step_data *step_data, |
| 369 | const unsigned char **inptrp, |
| 370 | const unsigned char *inend, |
| 371 | unsigned char **outptrp, unsigned char *outend, |
| 372 | size_t *irreversible) |
| 373 | { |
| 374 | mbstate_t *state = step_data->__statep; |
| 375 | int flags = step_data->__flags; |
| 376 | size_t cnt = state->__count & 7; |
| 377 | |
| 378 | while (*inptrp < inend && cnt < 4) |
| 379 | state->__value.__wchb[cnt++] = *(*inptrp)++; |
| 380 | |
| 381 | if (__glibc_unlikely (cnt < 4)) |
| 382 | { |
| 383 | /* Still not enough bytes. Store the ones in the input buffer. */ |
| 384 | state->__count &= ~7; |
| 385 | state->__count |= cnt; |
| 386 | |
| 387 | return __GCONV_INCOMPLETE_INPUT; |
| 388 | } |
| 389 | |
| 390 | if (__builtin_expect (((unsigned char *) state->__value.__wchb)[0] > 0x80, |
| 391 | 0)) |
| 392 | { |
| 393 | /* The value is too large. We don't try transliteration here since |
| 394 | this is not an error because of the lack of possibilities to |
| 395 | represent the result. This is a genuine bug in the input since |
| 396 | UCS4 does not allow such values. */ |
| 397 | if (!(flags & __GCONV_IGNORE_ERRORS)) |
| 398 | { |
| 399 | *inptrp -= cnt - (state->__count & 7); |
| 400 | return __GCONV_ILLEGAL_INPUT; |
| 401 | } |
| 402 | } |
| 403 | else |
| 404 | { |
| 405 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 406 | (*outptrp)[0] = state->__value.__wchb[3]; |
| 407 | (*outptrp)[1] = state->__value.__wchb[2]; |
| 408 | (*outptrp)[2] = state->__value.__wchb[1]; |
| 409 | (*outptrp)[3] = state->__value.__wchb[0]; |
| 410 | #elif __BYTE_ORDER == __BIG_ENDIAN |
| 411 | (*outptrp)[0] = state->__value.__wchb[0]; |
| 412 | (*outptrp)[1] = state->__value.__wchb[1]; |
| 413 | (*outptrp)[2] = state->__value.__wchb[2]; |
| 414 | (*outptrp)[3] = state->__value.__wchb[3]; |
| 415 | #endif |
| 416 | |
| 417 | *outptrp += 4; |
| 418 | } |
| 419 | |
| 420 | /* Clear the state buffer. */ |
| 421 | state->__count &= ~7; |
| 422 | |
| 423 | return __GCONV_OK; |
| 424 | } |
| 425 | |
| 426 | #include <iconv/skeleton.c> |
| 427 | |
| 428 | |
| 429 | /* Similarly for the little endian form. */ |
| 430 | #define DEFINE_INIT 0 |
| 431 | #define DEFINE_FINI 0 |
| 432 | #define MIN_NEEDED_FROM 4 |
| 433 | #define MIN_NEEDED_TO 4 |
| 434 | #define FROM_DIRECTION 1 |
| 435 | #define FROM_LOOP internal_ucs4le_loop |
| 436 | #define TO_LOOP internal_ucs4le_loop /* This is not used. */ |
| 437 | #define FUNCTION_NAME __gconv_transform_internal_ucs4le |
| 438 | #define ONE_DIRECTION 0 |
| 439 | |
| 440 | |
| 441 | static inline int |
| 442 | __attribute ((always_inline)) |
| 443 | internal_ucs4le_loop (struct __gconv_step *step, |
| 444 | struct __gconv_step_data *step_data, |
| 445 | const unsigned char **inptrp, const unsigned char *inend, |
| 446 | unsigned char **outptrp, unsigned char *outend, |
| 447 | size_t *irreversible) |
| 448 | { |
| 449 | const unsigned char *inptr = *inptrp; |
| 450 | unsigned char *outptr = *outptrp; |
| 451 | size_t n_convert = MIN (inend - inptr, outend - outptr) / 4; |
| 452 | int result; |
| 453 | |
| 454 | #if __BYTE_ORDER == __BIG_ENDIAN |
| 455 | /* Sigh, we have to do some real work. */ |
| 456 | size_t cnt; |
| 457 | uint32_t *outptr32 = (uint32_t *) outptr; |
| 458 | |
| 459 | for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4) |
| 460 | *outptr32++ = bswap_32 (*(const uint32_t *) inptr); |
| 461 | outptr = (unsigned char *) outptr32; |
| 462 | |
| 463 | *inptrp = inptr; |
| 464 | *outptrp = outptr; |
| 465 | #elif __BYTE_ORDER == __LITTLE_ENDIAN |
| 466 | /* Simply copy the data. */ |
| 467 | *inptrp = inptr + n_convert * 4; |
| 468 | *outptrp = __mempcpy (outptr, inptr, n_convert * 4); |
| 469 | #else |
| 470 | # error "This endianess is not supported." |
| 471 | #endif |
| 472 | |
| 473 | /* Determine the status. */ |
| 474 | if (*inptrp == inend) |
| 475 | result = __GCONV_EMPTY_INPUT; |
| 476 | else if (*outptrp + 4 > outend) |
| 477 | result = __GCONV_FULL_OUTPUT; |
| 478 | else |
| 479 | result = __GCONV_INCOMPLETE_INPUT; |
| 480 | |
| 481 | return result; |
| 482 | } |
| 483 | |
| 484 | #if !_STRING_ARCH_unaligned |
| 485 | static inline int |
| 486 | __attribute ((always_inline)) |
| 487 | internal_ucs4le_loop_unaligned (struct __gconv_step *step, |
| 488 | struct __gconv_step_data *step_data, |
| 489 | const unsigned char **inptrp, |
| 490 | const unsigned char *inend, |
| 491 | unsigned char **outptrp, unsigned char *outend, |
| 492 | size_t *irreversible) |
| 493 | { |
| 494 | const unsigned char *inptr = *inptrp; |
| 495 | unsigned char *outptr = *outptrp; |
| 496 | size_t n_convert = MIN (inend - inptr, outend - outptr) / 4; |
| 497 | int result; |
| 498 | |
| 499 | # if __BYTE_ORDER == __BIG_ENDIAN |
| 500 | /* Sigh, we have to do some real work. */ |
| 501 | size_t cnt; |
| 502 | |
| 503 | for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4, outptr += 4) |
| 504 | { |
| 505 | outptr[0] = inptr[3]; |
| 506 | outptr[1] = inptr[2]; |
| 507 | outptr[2] = inptr[1]; |
| 508 | outptr[3] = inptr[0]; |
| 509 | } |
| 510 | |
| 511 | *inptrp = inptr; |
| 512 | *outptrp = outptr; |
| 513 | # elif __BYTE_ORDER == __LITTLE_ENDIAN |
| 514 | /* Simply copy the data. */ |
| 515 | *inptrp = inptr + n_convert * 4; |
| 516 | *outptrp = __mempcpy (outptr, inptr, n_convert * 4); |
| 517 | # else |
| 518 | # error "This endianess is not supported." |
| 519 | # endif |
| 520 | |
| 521 | /* Determine the status. */ |
| 522 | if (*inptrp == inend) |
| 523 | result = __GCONV_EMPTY_INPUT; |
| 524 | else if (*inptrp + 4 > inend) |
| 525 | result = __GCONV_INCOMPLETE_INPUT; |
| 526 | else |
| 527 | { |
| 528 | assert (*outptrp + 4 > outend); |
| 529 | result = __GCONV_FULL_OUTPUT; |
| 530 | } |
| 531 | |
| 532 | return result; |
| 533 | } |
| 534 | #endif |
| 535 | |
| 536 | |
| 537 | static inline int |
| 538 | __attribute ((always_inline)) |
| 539 | internal_ucs4le_loop_single (struct __gconv_step *step, |
| 540 | struct __gconv_step_data *step_data, |
| 541 | const unsigned char **inptrp, |
| 542 | const unsigned char *inend, |
| 543 | unsigned char **outptrp, unsigned char *outend, |
| 544 | size_t *irreversible) |
| 545 | { |
| 546 | mbstate_t *state = step_data->__statep; |
| 547 | size_t cnt = state->__count & 7; |
| 548 | |
| 549 | while (*inptrp < inend && cnt < 4) |
| 550 | state->__value.__wchb[cnt++] = *(*inptrp)++; |
| 551 | |
| 552 | if (__glibc_unlikely (cnt < 4)) |
| 553 | { |
| 554 | /* Still not enough bytes. Store the ones in the input buffer. */ |
| 555 | state->__count &= ~7; |
| 556 | state->__count |= cnt; |
| 557 | |
| 558 | return __GCONV_INCOMPLETE_INPUT; |
| 559 | } |
| 560 | |
| 561 | #if __BYTE_ORDER == __BIG_ENDIAN |
| 562 | (*outptrp)[0] = state->__value.__wchb[3]; |
| 563 | (*outptrp)[1] = state->__value.__wchb[2]; |
| 564 | (*outptrp)[2] = state->__value.__wchb[1]; |
| 565 | (*outptrp)[3] = state->__value.__wchb[0]; |
| 566 | |
| 567 | #else |
| 568 | /* XXX unaligned */ |
| 569 | (*outptrp)[0] = state->__value.__wchb[0]; |
| 570 | (*outptrp)[1] = state->__value.__wchb[1]; |
| 571 | (*outptrp)[2] = state->__value.__wchb[2]; |
| 572 | (*outptrp)[3] = state->__value.__wchb[3]; |
| 573 | |
| 574 | #endif |
| 575 | |
| 576 | *outptrp += 4; |
| 577 | |
| 578 | /* Clear the state buffer. */ |
| 579 | state->__count &= ~7; |
| 580 | |
| 581 | return __GCONV_OK; |
| 582 | } |
| 583 | |
| 584 | #include <iconv/skeleton.c> |
| 585 | |
| 586 | |
| 587 | /* And finally from UCS4-LE to the internal encoding. */ |
| 588 | #define DEFINE_INIT 0 |
| 589 | #define DEFINE_FINI 0 |
| 590 | #define MIN_NEEDED_FROM 4 |
| 591 | #define MIN_NEEDED_TO 4 |
| 592 | #define FROM_DIRECTION 1 |
| 593 | #define FROM_LOOP ucs4le_internal_loop |
| 594 | #define TO_LOOP ucs4le_internal_loop /* This is not used. */ |
| 595 | #define FUNCTION_NAME __gconv_transform_ucs4le_internal |
| 596 | #define ONE_DIRECTION 0 |
| 597 | |
| 598 | |
| 599 | static inline int |
| 600 | __attribute ((always_inline)) |
| 601 | ucs4le_internal_loop (struct __gconv_step *step, |
| 602 | struct __gconv_step_data *step_data, |
| 603 | const unsigned char **inptrp, const unsigned char *inend, |
| 604 | unsigned char **outptrp, unsigned char *outend, |
| 605 | size_t *irreversible) |
| 606 | { |
| 607 | int flags = step_data->__flags; |
| 608 | const unsigned char *inptr = *inptrp; |
| 609 | unsigned char *outptr = *outptrp; |
| 610 | size_t n_convert = MIN (inend - inptr, outend - outptr) / 4; |
| 611 | int result; |
| 612 | size_t cnt; |
| 613 | |
| 614 | for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4) |
| 615 | { |
| 616 | uint32_t inval; |
| 617 | |
| 618 | #if __BYTE_ORDER == __BIG_ENDIAN |
| 619 | inval = bswap_32 (*(const uint32_t *) inptr); |
| 620 | #else |
| 621 | inval = *(const uint32_t *) inptr; |
| 622 | #endif |
| 623 | |
| 624 | if (__glibc_unlikely (inval > 0x7fffffff)) |
| 625 | { |
| 626 | /* The value is too large. We don't try transliteration here since |
| 627 | this is not an error because of the lack of possibilities to |
| 628 | represent the result. This is a genuine bug in the input since |
| 629 | UCS4 does not allow such values. */ |
| 630 | if (irreversible == NULL) |
| 631 | /* We are transliterating, don't try to correct anything. */ |
| 632 | return __GCONV_ILLEGAL_INPUT; |
| 633 | |
| 634 | if (flags & __GCONV_IGNORE_ERRORS) |
| 635 | { |
| 636 | /* Just ignore this character. */ |
| 637 | ++*irreversible; |
| 638 | continue; |
| 639 | } |
| 640 | |
| 641 | return __GCONV_ILLEGAL_INPUT; |
| 642 | } |
| 643 | |
| 644 | *((uint32_t *) outptr) = inval; |
| 645 | outptr += sizeof (uint32_t); |
| 646 | } |
| 647 | |
| 648 | *inptrp = inptr; |
| 649 | *outptrp = outptr; |
| 650 | |
| 651 | /* Determine the status. */ |
| 652 | if (*inptrp == inend) |
| 653 | result = __GCONV_EMPTY_INPUT; |
| 654 | else if (*inptrp + 4 > inend) |
| 655 | result = __GCONV_INCOMPLETE_INPUT; |
| 656 | else |
| 657 | { |
| 658 | assert (*outptrp + 4 > outend); |
| 659 | result = __GCONV_FULL_OUTPUT; |
| 660 | } |
| 661 | |
| 662 | return result; |
| 663 | } |
| 664 | |
| 665 | #if !_STRING_ARCH_unaligned |
| 666 | static inline int |
| 667 | __attribute ((always_inline)) |
| 668 | ucs4le_internal_loop_unaligned (struct __gconv_step *step, |
| 669 | struct __gconv_step_data *step_data, |
| 670 | const unsigned char **inptrp, |
| 671 | const unsigned char *inend, |
| 672 | unsigned char **outptrp, unsigned char *outend, |
| 673 | size_t *irreversible) |
| 674 | { |
| 675 | int flags = step_data->__flags; |
| 676 | const unsigned char *inptr = *inptrp; |
| 677 | unsigned char *outptr = *outptrp; |
| 678 | size_t n_convert = MIN (inend - inptr, outend - outptr) / 4; |
| 679 | int result; |
| 680 | size_t cnt; |
| 681 | |
| 682 | for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4) |
| 683 | { |
| 684 | if (__glibc_unlikely (inptr[3] > 0x80)) |
| 685 | { |
| 686 | /* The value is too large. We don't try transliteration here since |
| 687 | this is not an error because of the lack of possibilities to |
| 688 | represent the result. This is a genuine bug in the input since |
| 689 | UCS4 does not allow such values. */ |
| 690 | if (irreversible == NULL) |
| 691 | /* We are transliterating, don't try to correct anything. */ |
| 692 | return __GCONV_ILLEGAL_INPUT; |
| 693 | |
| 694 | if (flags & __GCONV_IGNORE_ERRORS) |
| 695 | { |
| 696 | /* Just ignore this character. */ |
| 697 | ++*irreversible; |
| 698 | continue; |
| 699 | } |
| 700 | |
| 701 | *inptrp = inptr; |
| 702 | *outptrp = outptr; |
| 703 | return __GCONV_ILLEGAL_INPUT; |
| 704 | } |
| 705 | |
| 706 | # if __BYTE_ORDER == __BIG_ENDIAN |
| 707 | outptr[3] = inptr[0]; |
| 708 | outptr[2] = inptr[1]; |
| 709 | outptr[1] = inptr[2]; |
| 710 | outptr[0] = inptr[3]; |
| 711 | # else |
| 712 | outptr[0] = inptr[0]; |
| 713 | outptr[1] = inptr[1]; |
| 714 | outptr[2] = inptr[2]; |
| 715 | outptr[3] = inptr[3]; |
| 716 | # endif |
| 717 | |
| 718 | outptr += 4; |
| 719 | } |
| 720 | |
| 721 | *inptrp = inptr; |
| 722 | *outptrp = outptr; |
| 723 | |
| 724 | /* Determine the status. */ |
| 725 | if (*inptrp == inend) |
| 726 | result = __GCONV_EMPTY_INPUT; |
| 727 | else if (*inptrp + 4 > inend) |
| 728 | result = __GCONV_INCOMPLETE_INPUT; |
| 729 | else |
| 730 | { |
| 731 | assert (*outptrp + 4 > outend); |
| 732 | result = __GCONV_FULL_OUTPUT; |
| 733 | } |
| 734 | |
| 735 | return result; |
| 736 | } |
| 737 | #endif |
| 738 | |
| 739 | |
| 740 | static inline int |
| 741 | __attribute ((always_inline)) |
| 742 | ucs4le_internal_loop_single (struct __gconv_step *step, |
| 743 | struct __gconv_step_data *step_data, |
| 744 | const unsigned char **inptrp, |
| 745 | const unsigned char *inend, |
| 746 | unsigned char **outptrp, unsigned char *outend, |
| 747 | size_t *irreversible) |
| 748 | { |
| 749 | mbstate_t *state = step_data->__statep; |
| 750 | int flags = step_data->__flags; |
| 751 | size_t cnt = state->__count & 7; |
| 752 | |
| 753 | while (*inptrp < inend && cnt < 4) |
| 754 | state->__value.__wchb[cnt++] = *(*inptrp)++; |
| 755 | |
| 756 | if (__glibc_unlikely (cnt < 4)) |
| 757 | { |
| 758 | /* Still not enough bytes. Store the ones in the input buffer. */ |
| 759 | state->__count &= ~7; |
| 760 | state->__count |= cnt; |
| 761 | |
| 762 | return __GCONV_INCOMPLETE_INPUT; |
| 763 | } |
| 764 | |
| 765 | if (__builtin_expect (((unsigned char *) state->__value.__wchb)[3] > 0x80, |
| 766 | 0)) |
| 767 | { |
| 768 | /* The value is too large. We don't try transliteration here since |
| 769 | this is not an error because of the lack of possibilities to |
| 770 | represent the result. This is a genuine bug in the input since |
| 771 | UCS4 does not allow such values. */ |
| 772 | if (!(flags & __GCONV_IGNORE_ERRORS)) |
| 773 | return __GCONV_ILLEGAL_INPUT; |
| 774 | } |
| 775 | else |
| 776 | { |
| 777 | #if __BYTE_ORDER == __BIG_ENDIAN |
| 778 | (*outptrp)[0] = state->__value.__wchb[3]; |
| 779 | (*outptrp)[1] = state->__value.__wchb[2]; |
| 780 | (*outptrp)[2] = state->__value.__wchb[1]; |
| 781 | (*outptrp)[3] = state->__value.__wchb[0]; |
| 782 | #else |
| 783 | (*outptrp)[0] = state->__value.__wchb[0]; |
| 784 | (*outptrp)[1] = state->__value.__wchb[1]; |
| 785 | (*outptrp)[2] = state->__value.__wchb[2]; |
| 786 | (*outptrp)[3] = state->__value.__wchb[3]; |
| 787 | #endif |
| 788 | |
| 789 | *outptrp += 4; |
| 790 | } |
| 791 | |
| 792 | /* Clear the state buffer. */ |
| 793 | state->__count &= ~7; |
| 794 | |
| 795 | return __GCONV_OK; |
| 796 | } |
| 797 | |
| 798 | #include <iconv/skeleton.c> |
| 799 | |
| 800 | |
| 801 | /* Convert from ISO 646-IRV to the internal (UCS4-like) format. */ |
| 802 | #define DEFINE_INIT 0 |
| 803 | #define DEFINE_FINI 0 |
| 804 | #define MIN_NEEDED_FROM 1 |
| 805 | #define MIN_NEEDED_TO 4 |
| 806 | #define FROM_DIRECTION 1 |
| 807 | #define FROM_LOOP ascii_internal_loop |
| 808 | #define TO_LOOP ascii_internal_loop /* This is not used. */ |
| 809 | #define FUNCTION_NAME __gconv_transform_ascii_internal |
| 810 | #define ONE_DIRECTION 1 |
| 811 | |
| 812 | #define MIN_NEEDED_INPUT MIN_NEEDED_FROM |
| 813 | #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO |
| 814 | #define LOOPFCT FROM_LOOP |
| 815 | #define BODY \ |
| 816 | { \ |
| 817 | if (__glibc_unlikely (*inptr > '\x7f')) \ |
| 818 | { \ |
| 819 | /* The value is too large. We don't try transliteration here since \ |
| 820 | this is not an error because of the lack of possibilities to \ |
| 821 | represent the result. This is a genuine bug in the input since \ |
| 822 | ASCII does not allow such values. */ \ |
| 823 | STANDARD_FROM_LOOP_ERR_HANDLER (1); \ |
| 824 | } \ |
| 825 | else \ |
| 826 | { \ |
| 827 | /* It's an one byte sequence. */ \ |
| 828 | *((uint32_t *) outptr) = *inptr++; \ |
| 829 | outptr += sizeof (uint32_t); \ |
| 830 | } \ |
| 831 | } |
| 832 | #define LOOP_NEED_FLAGS |
| 833 | #include <iconv/loop.c> |
| 834 | #include <iconv/skeleton.c> |
| 835 | |
| 836 | |
| 837 | /* Convert from the internal (UCS4-like) format to ISO 646-IRV. */ |
| 838 | #define DEFINE_INIT 0 |
| 839 | #define DEFINE_FINI 0 |
| 840 | #define MIN_NEEDED_FROM 4 |
| 841 | #define MIN_NEEDED_TO 1 |
| 842 | #define FROM_DIRECTION 1 |
| 843 | #define FROM_LOOP internal_ascii_loop |
| 844 | #define TO_LOOP internal_ascii_loop /* This is not used. */ |
| 845 | #define FUNCTION_NAME __gconv_transform_internal_ascii |
| 846 | #define ONE_DIRECTION 1 |
| 847 | |
| 848 | #define MIN_NEEDED_INPUT MIN_NEEDED_FROM |
| 849 | #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO |
| 850 | #define LOOPFCT FROM_LOOP |
| 851 | #define BODY \ |
| 852 | { \ |
| 853 | if (__glibc_unlikely (*((const uint32_t *) inptr) > 0x7f)) \ |
| 854 | { \ |
| 855 | UNICODE_TAG_HANDLER (*((const uint32_t *) inptr), 4); \ |
| 856 | STANDARD_TO_LOOP_ERR_HANDLER (4); \ |
| 857 | } \ |
| 858 | else \ |
| 859 | { \ |
| 860 | /* It's an one byte sequence. */ \ |
| 861 | *outptr++ = *((const uint32_t *) inptr); \ |
| 862 | inptr += sizeof (uint32_t); \ |
| 863 | } \ |
| 864 | } |
| 865 | #define LOOP_NEED_FLAGS |
| 866 | #include <iconv/loop.c> |
| 867 | #include <iconv/skeleton.c> |
| 868 | |
| 869 | |
| 870 | /* Convert from the internal (UCS4-like) format to UTF-8. */ |
| 871 | #define DEFINE_INIT 0 |
| 872 | #define DEFINE_FINI 0 |
| 873 | #define MIN_NEEDED_FROM 4 |
| 874 | #define MIN_NEEDED_TO 1 |
| 875 | #define MAX_NEEDED_TO 6 |
| 876 | #define FROM_DIRECTION 1 |
| 877 | #define FROM_LOOP internal_utf8_loop |
| 878 | #define TO_LOOP internal_utf8_loop /* This is not used. */ |
| 879 | #define FUNCTION_NAME __gconv_transform_internal_utf8 |
| 880 | #define ONE_DIRECTION 1 |
| 881 | |
| 882 | #define MIN_NEEDED_INPUT MIN_NEEDED_FROM |
| 883 | #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO |
| 884 | #define MAX_NEEDED_OUTPUT MAX_NEEDED_TO |
| 885 | #define LOOPFCT FROM_LOOP |
| 886 | #define BODY \ |
| 887 | { \ |
| 888 | uint32_t wc = *((const uint32_t *) inptr); \ |
| 889 | \ |
| 890 | if (__glibc_likely (wc < 0x80)) \ |
| 891 | /* It's an one byte sequence. */ \ |
| 892 | *outptr++ = (unsigned char) wc; \ |
| 893 | else if (__glibc_likely (wc <= 0x7fffffff)) \ |
| 894 | { \ |
| 895 | size_t step; \ |
| 896 | unsigned char *start; \ |
| 897 | \ |
| 898 | for (step = 2; step < 6; ++step) \ |
| 899 | if ((wc & (~(uint32_t)0 << (5 * step + 1))) == 0) \ |
| 900 | break; \ |
| 901 | \ |
| 902 | if (__glibc_unlikely (outptr + step > outend)) \ |
| 903 | { \ |
| 904 | /* Too long. */ \ |
| 905 | result = __GCONV_FULL_OUTPUT; \ |
| 906 | break; \ |
| 907 | } \ |
| 908 | \ |
| 909 | start = outptr; \ |
| 910 | *outptr = (unsigned char) (~0xff >> step); \ |
| 911 | outptr += step; \ |
| 912 | do \ |
| 913 | { \ |
| 914 | start[--step] = 0x80 | (wc & 0x3f); \ |
| 915 | wc >>= 6; \ |
| 916 | } \ |
| 917 | while (step > 1); \ |
| 918 | start[0] |= wc; \ |
| 919 | } \ |
| 920 | else \ |
| 921 | { \ |
| 922 | STANDARD_TO_LOOP_ERR_HANDLER (4); \ |
| 923 | } \ |
| 924 | \ |
| 925 | inptr += 4; \ |
| 926 | } |
| 927 | #define LOOP_NEED_FLAGS |
| 928 | #include <iconv/loop.c> |
| 929 | #include <iconv/skeleton.c> |
| 930 | |
| 931 | |
| 932 | /* Convert from UTF-8 to the internal (UCS4-like) format. */ |
| 933 | #define DEFINE_INIT 0 |
| 934 | #define DEFINE_FINI 0 |
| 935 | #define MIN_NEEDED_FROM 1 |
| 936 | #define MAX_NEEDED_FROM 6 |
| 937 | #define MIN_NEEDED_TO 4 |
| 938 | #define FROM_DIRECTION 1 |
| 939 | #define FROM_LOOP utf8_internal_loop |
| 940 | #define TO_LOOP utf8_internal_loop /* This is not used. */ |
| 941 | #define FUNCTION_NAME __gconv_transform_utf8_internal |
| 942 | #define ONE_DIRECTION 1 |
| 943 | |
| 944 | #define MIN_NEEDED_INPUT MIN_NEEDED_FROM |
| 945 | #define MAX_NEEDED_INPUT MAX_NEEDED_FROM |
| 946 | #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO |
| 947 | #define LOOPFCT FROM_LOOP |
| 948 | #define BODY \ |
| 949 | { \ |
| 950 | /* Next input byte. */ \ |
| 951 | uint32_t ch = *inptr; \ |
| 952 | \ |
| 953 | if (__glibc_likely (ch < 0x80)) \ |
| 954 | { \ |
| 955 | /* One byte sequence. */ \ |
| 956 | ++inptr; \ |
| 957 | } \ |
| 958 | else \ |
| 959 | { \ |
| 960 | uint_fast32_t cnt; \ |
| 961 | uint_fast32_t i; \ |
| 962 | \ |
| 963 | if (ch >= 0xc2 && ch < 0xe0) \ |
| 964 | { \ |
| 965 | /* We expect two bytes. The first byte cannot be 0xc0 or 0xc1, \ |
| 966 | otherwise the wide character could have been represented \ |
| 967 | using a single byte. */ \ |
| 968 | cnt = 2; \ |
| 969 | ch &= 0x1f; \ |
| 970 | } \ |
| 971 | else if (__glibc_likely ((ch & 0xf0) == 0xe0)) \ |
| 972 | { \ |
| 973 | /* We expect three bytes. */ \ |
| 974 | cnt = 3; \ |
| 975 | ch &= 0x0f; \ |
| 976 | } \ |
| 977 | else if (__glibc_likely ((ch & 0xf8) == 0xf0)) \ |
| 978 | { \ |
| 979 | /* We expect four bytes. */ \ |
| 980 | cnt = 4; \ |
| 981 | ch &= 0x07; \ |
| 982 | } \ |
| 983 | else if (__glibc_likely ((ch & 0xfc) == 0xf8)) \ |
| 984 | { \ |
| 985 | /* We expect five bytes. */ \ |
| 986 | cnt = 5; \ |
| 987 | ch &= 0x03; \ |
| 988 | } \ |
| 989 | else if (__glibc_likely ((ch & 0xfe) == 0xfc)) \ |
| 990 | { \ |
| 991 | /* We expect six bytes. */ \ |
| 992 | cnt = 6; \ |
| 993 | ch &= 0x01; \ |
| 994 | } \ |
| 995 | else \ |
| 996 | { \ |
| 997 | /* Search the end of this ill-formed UTF-8 character. This \ |
| 998 | is the next byte with (x & 0xc0) != 0x80. */ \ |
| 999 | i = 0; \ |
| 1000 | do \ |
| 1001 | ++i; \ |
| 1002 | while (inptr + i < inend \ |
| 1003 | && (*(inptr + i) & 0xc0) == 0x80 \ |
| 1004 | && i < 5); \ |
| 1005 | \ |
| 1006 | errout: \ |
| 1007 | STANDARD_FROM_LOOP_ERR_HANDLER (i); \ |
| 1008 | } \ |
| 1009 | \ |
| 1010 | if (__glibc_unlikely (inptr + cnt > inend)) \ |
| 1011 | { \ |
| 1012 | /* We don't have enough input. But before we report that check \ |
| 1013 | that all the bytes are correct. */ \ |
| 1014 | for (i = 1; inptr + i < inend; ++i) \ |
| 1015 | if ((inptr[i] & 0xc0) != 0x80) \ |
| 1016 | break; \ |
| 1017 | \ |
| 1018 | if (__glibc_likely (inptr + i == inend)) \ |
| 1019 | { \ |
| 1020 | result = __GCONV_INCOMPLETE_INPUT; \ |
| 1021 | break; \ |
| 1022 | } \ |
| 1023 | \ |
| 1024 | goto errout; \ |
| 1025 | } \ |
| 1026 | \ |
| 1027 | /* Read the possible remaining bytes. */ \ |
| 1028 | for (i = 1; i < cnt; ++i) \ |
| 1029 | { \ |
| 1030 | uint32_t byte = inptr[i]; \ |
| 1031 | \ |
| 1032 | if ((byte & 0xc0) != 0x80) \ |
| 1033 | /* This is an illegal encoding. */ \ |
| 1034 | break; \ |
| 1035 | \ |
| 1036 | ch <<= 6; \ |
| 1037 | ch |= byte & 0x3f; \ |
| 1038 | } \ |
| 1039 | \ |
| 1040 | /* If i < cnt, some trail byte was not >= 0x80, < 0xc0. \ |
| 1041 | If cnt > 2 and ch < 2^(5*cnt-4), the wide character ch could \ |
| 1042 | have been represented with fewer than cnt bytes. */ \ |
| 1043 | if (i < cnt || (cnt > 2 && (ch >> (5 * cnt - 4)) == 0) \ |
| 1044 | /* Do not accept UTF-16 surrogates. */ \ |
| 1045 | || (ch >= 0xd800 && ch <= 0xdfff)) \ |
| 1046 | { \ |
| 1047 | /* This is an illegal encoding. */ \ |
| 1048 | goto errout; \ |
| 1049 | } \ |
| 1050 | \ |
| 1051 | inptr += cnt; \ |
| 1052 | } \ |
| 1053 | \ |
| 1054 | /* Now adjust the pointers and store the result. */ \ |
| 1055 | *((uint32_t *) outptr) = ch; \ |
| 1056 | outptr += sizeof (uint32_t); \ |
| 1057 | } |
| 1058 | #define LOOP_NEED_FLAGS |
| 1059 | |
| 1060 | #define STORE_REST \ |
| 1061 | { \ |
| 1062 | /* We store the remaining bytes while converting them into the UCS4 \ |
| 1063 | format. We can assume that the first byte in the buffer is \ |
| 1064 | correct and that it requires a larger number of bytes than there \ |
| 1065 | are in the input buffer. */ \ |
| 1066 | wint_t ch = **inptrp; \ |
| 1067 | size_t cnt, r; \ |
| 1068 | \ |
| 1069 | state->__count = inend - *inptrp; \ |
| 1070 | \ |
| 1071 | assert (ch != 0xc0 && ch != 0xc1); \ |
| 1072 | if (ch >= 0xc2 && ch < 0xe0) \ |
| 1073 | { \ |
| 1074 | /* We expect two bytes. The first byte cannot be 0xc0 or \ |
| 1075 | 0xc1, otherwise the wide character could have been \ |
| 1076 | represented using a single byte. */ \ |
| 1077 | cnt = 2; \ |
| 1078 | ch &= 0x1f; \ |
| 1079 | } \ |
| 1080 | else if (__glibc_likely ((ch & 0xf0) == 0xe0)) \ |
| 1081 | { \ |
| 1082 | /* We expect three bytes. */ \ |
| 1083 | cnt = 3; \ |
| 1084 | ch &= 0x0f; \ |
| 1085 | } \ |
| 1086 | else if (__glibc_likely ((ch & 0xf8) == 0xf0)) \ |
| 1087 | { \ |
| 1088 | /* We expect four bytes. */ \ |
| 1089 | cnt = 4; \ |
| 1090 | ch &= 0x07; \ |
| 1091 | } \ |
| 1092 | else if (__glibc_likely ((ch & 0xfc) == 0xf8)) \ |
| 1093 | { \ |
| 1094 | /* We expect five bytes. */ \ |
| 1095 | cnt = 5; \ |
| 1096 | ch &= 0x03; \ |
| 1097 | } \ |
| 1098 | else \ |
| 1099 | { \ |
| 1100 | /* We expect six bytes. */ \ |
| 1101 | cnt = 6; \ |
| 1102 | ch &= 0x01; \ |
| 1103 | } \ |
| 1104 | \ |
| 1105 | /* The first byte is already consumed. */ \ |
| 1106 | r = cnt - 1; \ |
| 1107 | while (++(*inptrp) < inend) \ |
| 1108 | { \ |
| 1109 | ch <<= 6; \ |
| 1110 | ch |= **inptrp & 0x3f; \ |
| 1111 | --r; \ |
| 1112 | } \ |
| 1113 | \ |
| 1114 | /* Shift for the so far missing bytes. */ \ |
| 1115 | ch <<= r * 6; \ |
| 1116 | \ |
| 1117 | /* Store the number of bytes expected for the entire sequence. */ \ |
| 1118 | state->__count |= cnt << 8; \ |
| 1119 | \ |
| 1120 | /* Store the value. */ \ |
| 1121 | state->__value.__wch = ch; \ |
| 1122 | } |
| 1123 | |
| 1124 | #define UNPACK_BYTES \ |
| 1125 | { \ |
| 1126 | static const unsigned char inmask[5] = { 0xc0, 0xe0, 0xf0, 0xf8, 0xfc }; \ |
| 1127 | wint_t wch = state->__value.__wch; \ |
| 1128 | size_t ntotal = state->__count >> 8; \ |
| 1129 | \ |
| 1130 | inlen = state->__count & 255; \ |
| 1131 | \ |
| 1132 | bytebuf[0] = inmask[ntotal - 2]; \ |
| 1133 | \ |
| 1134 | do \ |
| 1135 | { \ |
| 1136 | if (--ntotal < inlen) \ |
| 1137 | bytebuf[ntotal] = 0x80 | (wch & 0x3f); \ |
| 1138 | wch >>= 6; \ |
| 1139 | } \ |
| 1140 | while (ntotal > 1); \ |
| 1141 | \ |
| 1142 | bytebuf[0] |= wch; \ |
| 1143 | } |
| 1144 | |
| 1145 | #define CLEAR_STATE \ |
| 1146 | state->__count = 0 |
| 1147 | |
| 1148 | |
| 1149 | #include <iconv/loop.c> |
| 1150 | #include <iconv/skeleton.c> |
| 1151 | |
| 1152 | |
| 1153 | /* Convert from UCS2 to the internal (UCS4-like) format. */ |
| 1154 | #define DEFINE_INIT 0 |
| 1155 | #define DEFINE_FINI 0 |
| 1156 | #define MIN_NEEDED_FROM 2 |
| 1157 | #define MIN_NEEDED_TO 4 |
| 1158 | #define FROM_DIRECTION 1 |
| 1159 | #define FROM_LOOP ucs2_internal_loop |
| 1160 | #define TO_LOOP ucs2_internal_loop /* This is not used. */ |
| 1161 | #define FUNCTION_NAME __gconv_transform_ucs2_internal |
| 1162 | #define ONE_DIRECTION 1 |
| 1163 | |
| 1164 | #define MIN_NEEDED_INPUT MIN_NEEDED_FROM |
| 1165 | #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO |
| 1166 | #define LOOPFCT FROM_LOOP |
| 1167 | #define BODY \ |
| 1168 | { \ |
| 1169 | uint16_t u1 = get16 (inptr); \ |
| 1170 | \ |
| 1171 | if (__glibc_unlikely (u1 >= 0xd800 && u1 < 0xe000)) \ |
| 1172 | { \ |
| 1173 | /* Surrogate characters in UCS-2 input are not valid. Reject \ |
| 1174 | them. (Catching this here is not security relevant.) */ \ |
| 1175 | STANDARD_FROM_LOOP_ERR_HANDLER (2); \ |
| 1176 | } \ |
| 1177 | \ |
| 1178 | *((uint32_t *) outptr) = u1; \ |
| 1179 | outptr += sizeof (uint32_t); \ |
| 1180 | inptr += 2; \ |
| 1181 | } |
| 1182 | #define LOOP_NEED_FLAGS |
| 1183 | #include <iconv/loop.c> |
| 1184 | #include <iconv/skeleton.c> |
| 1185 | |
| 1186 | |
| 1187 | /* Convert from the internal (UCS4-like) format to UCS2. */ |
| 1188 | #define DEFINE_INIT 0 |
| 1189 | #define DEFINE_FINI 0 |
| 1190 | #define MIN_NEEDED_FROM 4 |
| 1191 | #define MIN_NEEDED_TO 2 |
| 1192 | #define FROM_DIRECTION 1 |
| 1193 | #define FROM_LOOP internal_ucs2_loop |
| 1194 | #define TO_LOOP internal_ucs2_loop /* This is not used. */ |
| 1195 | #define FUNCTION_NAME __gconv_transform_internal_ucs2 |
| 1196 | #define ONE_DIRECTION 1 |
| 1197 | |
| 1198 | #define MIN_NEEDED_INPUT MIN_NEEDED_FROM |
| 1199 | #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO |
| 1200 | #define LOOPFCT FROM_LOOP |
| 1201 | #define BODY \ |
| 1202 | { \ |
| 1203 | uint32_t val = *((const uint32_t *) inptr); \ |
| 1204 | \ |
| 1205 | if (__glibc_unlikely (val >= 0x10000)) \ |
| 1206 | { \ |
| 1207 | UNICODE_TAG_HANDLER (val, 4); \ |
| 1208 | STANDARD_TO_LOOP_ERR_HANDLER (4); \ |
| 1209 | } \ |
| 1210 | else if (__glibc_unlikely (val >= 0xd800 && val < 0xe000)) \ |
| 1211 | { \ |
| 1212 | /* Surrogate characters in UCS-4 input are not valid. \ |
| 1213 | We must catch this, because the UCS-2 output might be \ |
| 1214 | interpreted as UTF-16 by other programs. If we let \ |
| 1215 | surrogates pass through, attackers could make a security \ |
| 1216 | hole exploit by synthesizing any desired plane 1-16 \ |
| 1217 | character. */ \ |
| 1218 | result = __GCONV_ILLEGAL_INPUT; \ |
| 1219 | if (! ignore_errors_p ()) \ |
| 1220 | break; \ |
| 1221 | inptr += 4; \ |
| 1222 | ++*irreversible; \ |
| 1223 | continue; \ |
| 1224 | } \ |
| 1225 | else \ |
| 1226 | { \ |
| 1227 | put16 (outptr, val); \ |
| 1228 | outptr += sizeof (uint16_t); \ |
| 1229 | inptr += 4; \ |
| 1230 | } \ |
| 1231 | } |
| 1232 | #define LOOP_NEED_FLAGS |
| 1233 | #include <iconv/loop.c> |
| 1234 | #include <iconv/skeleton.c> |
| 1235 | |
| 1236 | |
| 1237 | /* Convert from UCS2 in other endianness to the internal (UCS4-like) format. */ |
| 1238 | #define DEFINE_INIT 0 |
| 1239 | #define DEFINE_FINI 0 |
| 1240 | #define MIN_NEEDED_FROM 2 |
| 1241 | #define MIN_NEEDED_TO 4 |
| 1242 | #define FROM_DIRECTION 1 |
| 1243 | #define FROM_LOOP ucs2reverse_internal_loop |
| 1244 | #define TO_LOOP ucs2reverse_internal_loop/* This is not used.*/ |
| 1245 | #define FUNCTION_NAME __gconv_transform_ucs2reverse_internal |
| 1246 | #define ONE_DIRECTION 1 |
| 1247 | |
| 1248 | #define MIN_NEEDED_INPUT MIN_NEEDED_FROM |
| 1249 | #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO |
| 1250 | #define LOOPFCT FROM_LOOP |
| 1251 | #define BODY \ |
| 1252 | { \ |
| 1253 | uint16_t u1 = bswap_16 (get16 (inptr)); \ |
| 1254 | \ |
| 1255 | if (__glibc_unlikely (u1 >= 0xd800 && u1 < 0xe000)) \ |
| 1256 | { \ |
| 1257 | /* Surrogate characters in UCS-2 input are not valid. Reject \ |
| 1258 | them. (Catching this here is not security relevant.) */ \ |
| 1259 | if (! ignore_errors_p ()) \ |
| 1260 | { \ |
| 1261 | result = __GCONV_ILLEGAL_INPUT; \ |
| 1262 | break; \ |
| 1263 | } \ |
| 1264 | inptr += 2; \ |
| 1265 | ++*irreversible; \ |
| 1266 | continue; \ |
| 1267 | } \ |
| 1268 | \ |
| 1269 | *((uint32_t *) outptr) = u1; \ |
| 1270 | outptr += sizeof (uint32_t); \ |
| 1271 | inptr += 2; \ |
| 1272 | } |
| 1273 | #define LOOP_NEED_FLAGS |
| 1274 | #include <iconv/loop.c> |
| 1275 | #include <iconv/skeleton.c> |
| 1276 | |
| 1277 | |
| 1278 | /* Convert from the internal (UCS4-like) format to UCS2 in other endianness. */ |
| 1279 | #define DEFINE_INIT 0 |
| 1280 | #define DEFINE_FINI 0 |
| 1281 | #define MIN_NEEDED_FROM 4 |
| 1282 | #define MIN_NEEDED_TO 2 |
| 1283 | #define FROM_DIRECTION 1 |
| 1284 | #define FROM_LOOP internal_ucs2reverse_loop |
| 1285 | #define TO_LOOP internal_ucs2reverse_loop/* This is not used.*/ |
| 1286 | #define FUNCTION_NAME __gconv_transform_internal_ucs2reverse |
| 1287 | #define ONE_DIRECTION 1 |
| 1288 | |
| 1289 | #define MIN_NEEDED_INPUT MIN_NEEDED_FROM |
| 1290 | #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO |
| 1291 | #define LOOPFCT FROM_LOOP |
| 1292 | #define BODY \ |
| 1293 | { \ |
| 1294 | uint32_t val = *((const uint32_t *) inptr); \ |
| 1295 | if (__glibc_unlikely (val >= 0x10000)) \ |
| 1296 | { \ |
| 1297 | UNICODE_TAG_HANDLER (val, 4); \ |
| 1298 | STANDARD_TO_LOOP_ERR_HANDLER (4); \ |
| 1299 | } \ |
| 1300 | else if (__glibc_unlikely (val >= 0xd800 && val < 0xe000)) \ |
| 1301 | { \ |
| 1302 | /* Surrogate characters in UCS-4 input are not valid. \ |
| 1303 | We must catch this, because the UCS-2 output might be \ |
| 1304 | interpreted as UTF-16 by other programs. If we let \ |
| 1305 | surrogates pass through, attackers could make a security \ |
| 1306 | hole exploit by synthesizing any desired plane 1-16 \ |
| 1307 | character. */ \ |
| 1308 | if (! ignore_errors_p ()) \ |
| 1309 | { \ |
| 1310 | result = __GCONV_ILLEGAL_INPUT; \ |
| 1311 | break; \ |
| 1312 | } \ |
| 1313 | inptr += 4; \ |
| 1314 | ++*irreversible; \ |
| 1315 | continue; \ |
| 1316 | } \ |
| 1317 | else \ |
| 1318 | { \ |
| 1319 | put16 (outptr, bswap_16 (val)); \ |
| 1320 | outptr += sizeof (uint16_t); \ |
| 1321 | inptr += 4; \ |
| 1322 | } \ |
| 1323 | } |
| 1324 | #define LOOP_NEED_FLAGS |
| 1325 | #include <iconv/loop.c> |
| 1326 | #include <iconv/skeleton.c> |