wcsmbs/test-c8rtomb.c

   1 /* Test c8rtomb.
   2    Copyright (C) 2022-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <limits.h>
  21 #include <locale.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <uchar.h>
  26 #include <wchar.h>
  27 #include <support/check.h>
  28 #include <support/support.h>
  29
  30 static int
  31 test_truncated_code_unit_sequence (void)
  32 {
  33   /* Missing trailing code unit for a two code byte unit sequence.  */
  34   {
  35     const char8_t *u8s = (const char8_t*) u8"\xC2";
  36     char buf[MB_LEN_MAX] = { 0 };
  37     mbstate_t s = { 0 };
  38
  39     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
  40     errno = 0;
  41     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) -1);
  42     TEST_COMPARE (errno, EILSEQ);
  43   }
  44
  45   /* Missing first trailing code unit for a three byte code unit sequence.  */
  46   {
  47     const char8_t *u8s = (const char8_t*) u8"\xE0";
  48     char buf[MB_LEN_MAX] = { 0 };
  49     mbstate_t s = { 0 };
  50
  51     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
  52     errno = 0;
  53     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) -1);
  54     TEST_COMPARE (errno, EILSEQ);
  55   }
  56
  57   /* Missing second trailing code unit for a three byte code unit sequence.  */
  58   {
  59     const char8_t *u8s = (const char8_t*) u8"\xE0\xA0";
  60     char buf[MB_LEN_MAX] = { 0 };
  61     mbstate_t s = { 0 };
  62
  63     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
  64     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t)  0);
  65     errno = 0;
  66     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t) -1);
  67     TEST_COMPARE (errno, EILSEQ);
  68   }
  69
  70   /* Missing first trailing code unit for a four byte code unit sequence.  */
  71   {
  72     const char8_t *u8s = (const char8_t*) u8"\xF0";
  73     char buf[MB_LEN_MAX] = { 0 };
  74     mbstate_t s = { 0 };
  75
  76     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
  77     errno = 0;
  78     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) -1);
  79     TEST_COMPARE (errno, EILSEQ);
  80   }
  81
  82   /* Missing second trailing code unit for a four byte code unit sequence.  */
  83   {
  84     const char8_t *u8s = (const char8_t*) u8"\xF0\x90";
  85     char buf[MB_LEN_MAX] = { 0 };
  86     mbstate_t s = { 0 };
  87
  88     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
  89     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t)  0);
  90     errno = 0;
  91     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t) -1);
  92     TEST_COMPARE (errno, EILSEQ);
  93   }
  94
  95   /* Missing third trailing code unit for a four byte code unit sequence.  */
  96   {
  97     const char8_t *u8s = (const char8_t*) u8"\xF0\x90\x80";
  98     char buf[MB_LEN_MAX] = { 0 };
  99     mbstate_t s = { 0 };
 100
 101     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
 102     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t)  0);
 103     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t)  0);
 104     errno = 0;
 105     TEST_COMPARE (c8rtomb (buf, u8s[3], &s), (size_t) -1);
 106     TEST_COMPARE (errno, EILSEQ);
 107   }
 108
 109   return 0;
 110 }
 111
 112 static int
 113 test_invalid_trailing_code_unit_sequence (void)
 114 {
 115   /* Invalid trailing code unit for a two code byte unit sequence.  */
 116   {
 117     const char8_t *u8s = (const char8_t*) u8"\xC2\xC0";
 118     char buf[MB_LEN_MAX] = { 0 };
 119     mbstate_t s = { 0 };
 120
 121     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
 122     errno = 0;
 123     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) -1);
 124     TEST_COMPARE (errno, EILSEQ);
 125   }
 126
 127   /* Invalid first trailing code unit for a three byte code unit sequence.  */
 128   {
 129     const char8_t *u8s = (const char8_t*) u8"\xE0\xC0";
 130     char buf[MB_LEN_MAX] = { 0 };
 131     mbstate_t s = { 0 };
 132
 133     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
 134     errno = 0;
 135     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) -1);
 136     TEST_COMPARE (errno, EILSEQ);
 137   }
 138
 139   /* Invalid second trailing code unit for a three byte code unit sequence.  */
 140   {
 141     const char8_t *u8s = (const char8_t*) u8"\xE0\xA0\xC0";
 142     char buf[MB_LEN_MAX] = { 0 };
 143     mbstate_t s = { 0 };
 144
 145     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
 146     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t)  0);
 147     errno = 0;
 148     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t) -1);
 149     TEST_COMPARE (errno, EILSEQ);
 150   }
 151
 152   /* Invalid first trailing code unit for a four byte code unit sequence.  */
 153   {
 154     const char8_t *u8s = (const char8_t*) u8"\xF0\xC0";
 155     char buf[MB_LEN_MAX] = { 0 };
 156     mbstate_t s = { 0 };
 157
 158     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
 159     errno = 0;
 160     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) -1);
 161     TEST_COMPARE (errno, EILSEQ);
 162   }
 163
 164   /* Invalid second trailing code unit for a four byte code unit sequence.  */
 165   {
 166     const char8_t *u8s = (const char8_t*) u8"\xF0\x90\xC0";
 167     char buf[MB_LEN_MAX] = { 0 };
 168     mbstate_t s = { 0 };
 169
 170     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
 171     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t)  0);
 172     errno = 0;
 173     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t) -1);
 174     TEST_COMPARE (errno, EILSEQ);
 175   }
 176
 177   /* Invalid third trailing code unit for a four byte code unit sequence.  */
 178   {
 179     const char8_t *u8s = (const char8_t*) u8"\xF0\x90\x80\xC0";
 180     char buf[MB_LEN_MAX] = { 0 };
 181     mbstate_t s = { 0 };
 182
 183     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
 184     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t)  0);
 185     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t)  0);
 186     errno = 0;
 187     TEST_COMPARE (c8rtomb (buf, u8s[3], &s), (size_t) -1);
 188     TEST_COMPARE (errno, EILSEQ);
 189   }
 190
 191   return 0;
 192 }
 193
 194 static int
 195 test_lone_trailing_code_units (void)
 196 {
 197   /* Lone trailing code unit.  */
 198   const char8_t *u8s = (const char8_t*) u8"\x80";
 199   char buf[MB_LEN_MAX] = { 0 };
 200   mbstate_t s = { 0 };
 201
 202   errno = 0;
 203   TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) -1);
 204   TEST_COMPARE (errno, EILSEQ);
 205
 206   return 0;
 207 }
 208
 209 static int
 210 test_overlong_encoding (void)
 211 {
 212   /* Two byte overlong encoding.  */
 213   {
 214     const char8_t *u8s = (const char8_t*) u8"\xC0\x80";
 215     char buf[MB_LEN_MAX] = { 0 };
 216     mbstate_t s = { 0 };
 217
 218     errno = 0;
 219     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) -1);
 220     TEST_COMPARE (errno, EILSEQ);
 221   }
 222
 223   /* Two byte overlong encoding.  */
 224   {
 225     const char8_t *u8s = (const char8_t*) u8"\xC1\x80";
 226     char buf[MB_LEN_MAX] = { 0 };
 227     mbstate_t s = { 0 };
 228
 229     errno = 0;
 230     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) -1);
 231     TEST_COMPARE (errno, EILSEQ);
 232   }
 233
 234   /* Three byte overlong encoding.  */
 235   {
 236     const char8_t *u8s = (const char8_t*) u8"\xE0\x9F\xBF";
 237     char buf[MB_LEN_MAX] = { 0 };
 238     mbstate_t s = { 0 };
 239
 240     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
 241     errno = 0;
 242     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) -1);
 243     TEST_COMPARE (errno, EILSEQ);
 244   }
 245
 246   /* Four byte overlong encoding.  */
 247   {
 248     const char8_t *u8s = (const char8_t*) u8"\xF0\x8F\xBF\xBF";
 249     char buf[MB_LEN_MAX] = { 0 };
 250     mbstate_t s = { 0 };
 251
 252     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
 253     errno = 0;
 254     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) -1);
 255     TEST_COMPARE (errno, EILSEQ);
 256   }
 257
 258   return 0;
 259 }
 260
 261 static int
 262 test_surrogate_range (void)
 263 {
 264   /* Would encode U+D800.  */
 265   {
 266     const char8_t *u8s = (const char8_t*) u8"\xED\xA0\x80";
 267     char buf[MB_LEN_MAX] = { 0 };
 268     mbstate_t s = { 0 };
 269
 270     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
 271     errno = 0;
 272     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) -1);
 273     TEST_COMPARE (errno, EILSEQ);
 274   }
 275
 276   /* Would encode U+DFFF.  */
 277   {
 278     const char8_t *u8s = (const char8_t*) u8"\xED\xBF\xBF";
 279     char buf[MB_LEN_MAX] = { 0 };
 280     mbstate_t s = { 0 };
 281
 282     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
 283     errno = 0;
 284     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) -1);
 285     TEST_COMPARE (errno, EILSEQ);
 286   }
 287
 288   return 0;
 289 }
 290
 291 static int
 292 test_out_of_range_encoding (void)
 293 {
 294   /* Would encode U+00110000.  */
 295   {
 296     const char8_t *u8s = (const char8_t*) u8"\xF4\x90\x80\x80";
 297     char buf[MB_LEN_MAX] = { 0 };
 298     mbstate_t s = { 0 };
 299
 300     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t)  0);
 301     errno = 0;
 302     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) -1);
 303     TEST_COMPARE (errno, EILSEQ);
 304   }
 305
 306   /* Would encode U+00140000.  */
 307   {
 308     const char8_t *u8s = (const char8_t*) u8"\xF5\x90\x80\x80";
 309     char buf[MB_LEN_MAX] = { 0 };
 310     mbstate_t s = { 0 };
 311
 312     errno = 0;
 313     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) -1);
 314     TEST_COMPARE (errno, EILSEQ);
 315   }
 316
 317   return 0;
 318 }
 319
 320 static int
 321 test_null_output_buffer (void)
 322 {
 323   /* Null character with an initial state.  */
 324   {
 325     mbstate_t s = { 0 };
 326
 327     TEST_COMPARE (c8rtomb (NULL, u8"X"[0], &s), (size_t) 1);
 328     /* Assert the state is now an initial state.  */
 329     TEST_VERIFY (mbsinit (&s));
 330   }
 331
 332   /* Null buffer with a state corresponding to an incompletely read code
 333      unit sequence.  In this case, an error occurs since insufficient
 334      information is available to complete the already started code unit
 335      sequence and return to the initial state.  */
 336   {
 337     char buf[MB_LEN_MAX] = { 0 };
 338     mbstate_t s = { 0 };
 339
 340     TEST_COMPARE (c8rtomb (buf, u8"\xC2"[0], &s), (size_t)  0);
 341     errno = 0;
 342     TEST_COMPARE (c8rtomb (NULL, u8"\x80"[0], &s), (size_t) -1);
 343     TEST_COMPARE (errno, EILSEQ);
 344   }
 345
 346   return 0;
 347 }
 348
 349 static int
 350 test_utf8 (void)
 351 {
 352   xsetlocale (LC_ALL, "de_DE.UTF-8");
 353
 354   /* Null character.  */
 355   {
 356     /* U+0000 => 0x00 */
 357     const char8_t *u8s = (const char8_t*) u8"\x00";
 358     char buf[MB_LEN_MAX] = { 0 };
 359     mbstate_t s = { 0 };
 360
 361     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) 1);
 362     TEST_COMPARE (buf[0], (char) 0x00);
 363     TEST_VERIFY (mbsinit (&s));
 364   }
 365
 366   /* First non-null character in the code point range that maps to a single
 367      code unit.  */
 368   {
 369     /* U+0001 => 0x01 */
 370     const char8_t *u8s = (const char8_t*) u8"\x01";
 371     char buf[MB_LEN_MAX] = { 0 };
 372     mbstate_t s = { 0 };
 373
 374     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) 1);
 375     TEST_COMPARE (buf[0], (char) 0x01);
 376     TEST_VERIFY (mbsinit (&s));
 377   }
 378
 379   /* Last character in the code point range that maps to a single code unit.  */
 380   {
 381     /* U+007F => 0x7F */
 382     const char8_t *u8s = (const char8_t*) u8"\x7F";
 383     char buf[MB_LEN_MAX] = { 0 };
 384     mbstate_t s = { 0 };
 385
 386     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) 1);
 387     TEST_COMPARE (buf[0], (char) 0x7F);
 388     TEST_VERIFY (mbsinit (&s));
 389   }
 390
 391   /* First character in the code point range that maps to two code units.  */
 392   {
 393     /* U+0080 => 0xC2 0x80 */
 394     const char8_t *u8s = (const char8_t*) u8"\xC2\x80";
 395     char buf[MB_LEN_MAX] = { 0 };
 396     mbstate_t s = { 0 };
 397
 398     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) 0);
 399     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) 2);
 400     TEST_COMPARE (buf[0], (char) 0xC2);
 401     TEST_COMPARE (buf[1], (char) 0x80);
 402     TEST_VERIFY (mbsinit (&s));
 403   }
 404
 405   /* Last character in the code point range that maps to two code units.  */
 406   {
 407     /* U+07FF => 0xDF 0xBF */
 408     const char8_t *u8s = (const char8_t*) u8"\u07FF";
 409     char buf[MB_LEN_MAX] = { 0 };
 410     mbstate_t s = { 0 };
 411
 412     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) 0);
 413     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) 2);
 414     TEST_COMPARE (buf[0], (char) 0xDF);
 415     TEST_COMPARE (buf[1], (char) 0xBF);
 416     TEST_VERIFY (mbsinit (&s));
 417   }
 418
 419   /* First character in the code point range that maps to three code units.  */
 420   {
 421     /* U+0800 => 0xE0 0xA0 0x80 */
 422     const char8_t *u8s = (const char8_t*) u8"\u0800";
 423     char buf[MB_LEN_MAX] = { 0 };
 424     mbstate_t s = { 0 };
 425
 426     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) 0);
 427     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) 0);
 428     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t) 3);
 429     TEST_COMPARE (buf[0], (char) 0xE0);
 430     TEST_COMPARE (buf[1], (char) 0xA0);
 431     TEST_COMPARE (buf[2], (char) 0x80);
 432     TEST_VERIFY (mbsinit (&s));
 433   }
 434
 435   /* Last character in the code point range that maps to three code units
 436      before the surrogate code point range.  */
 437   {
 438     /* U+D7FF => 0xED 0x9F 0xBF */
 439     const char8_t *u8s = (const char8_t*) u8"\uD7FF";
 440     char buf[MB_LEN_MAX] = { 0 };
 441     mbstate_t s = { 0 };
 442
 443     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) 0);
 444     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) 0);
 445     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t) 3);
 446     TEST_COMPARE (buf[0], (char) 0xED);
 447     TEST_COMPARE (buf[1], (char) 0x9F);
 448     TEST_COMPARE (buf[2], (char) 0xBF);
 449     TEST_VERIFY (mbsinit (&s));
 450   }
 451
 452   /* First character in the code point range that maps to three code units
 453      after the surrogate code point range.  */
 454   {
 455     /* U+E000 => 0xEE 0x80 0x80 */
 456     const char8_t *u8s = (const char8_t*) u8"\uE000";
 457     char buf[MB_LEN_MAX] = { 0 };
 458     mbstate_t s = { 0 };
 459
 460     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) 0);
 461     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) 0);
 462     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t) 3);
 463     TEST_COMPARE (buf[0], (char) 0xEE);
 464     TEST_COMPARE (buf[1], (char) 0x80);
 465     TEST_COMPARE (buf[2], (char) 0x80);
 466     TEST_VERIFY (mbsinit (&s));
 467   }
 468
 469   /* Not a BOM.  */
 470   {
 471     /* U+FEFF => 0xEF 0xBB 0xBF */
 472     const char8_t *u8s = (const char8_t*) u8"\uFEFF";
 473     char buf[MB_LEN_MAX] = { 0 };
 474     mbstate_t s = { 0 };
 475
 476     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) 0);
 477     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) 0);
 478     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t) 3);
 479     TEST_COMPARE (buf[0], (char) 0xEF);
 480     TEST_COMPARE (buf[1], (char) 0xBB);
 481     TEST_COMPARE (buf[2], (char) 0xBF);
 482     TEST_VERIFY (mbsinit (&s));
 483   }
 484
 485   /* Replacement character.  */
 486   {
 487     /* U+FFFD => 0xEF 0xBF 0xBD */
 488     const char8_t *u8s = (const char8_t*) u8"\uFFFD";
 489     char buf[MB_LEN_MAX] = { 0 };
 490     mbstate_t s = { 0 };
 491
 492     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) 0);
 493     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) 0);
 494     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t) 3);
 495     TEST_COMPARE (buf[0], (char) 0xEF);
 496     TEST_COMPARE (buf[1], (char) 0xBF);
 497     TEST_COMPARE (buf[2], (char) 0xBD);
 498     TEST_VERIFY (mbsinit (&s));
 499   }
 500
 501   /* Last character in the code point range that maps to three code units.  */
 502   {
 503     /* U+FFFF => 0xEF 0xBF 0xBF */
 504     const char8_t *u8s = (const char8_t*) u8"\uFFFF";
 505     char buf[MB_LEN_MAX] = { 0 };
 506     mbstate_t s = { 0 };
 507
 508     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) 0);
 509     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) 0);
 510     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t) 3);
 511     TEST_COMPARE (buf[0], (char) 0xEF);
 512     TEST_COMPARE (buf[1], (char) 0xBF);
 513     TEST_COMPARE (buf[2], (char) 0xBF);
 514     TEST_VERIFY (mbsinit (&s));
 515   }
 516
 517   /* First character in the code point range that maps to four code units.  */
 518   {
 519     /* U+10000 => 0xF0 0x90 0x80 0x80 */
 520     const char8_t *u8s = (const char8_t*) u8"\U00010000";
 521     char buf[MB_LEN_MAX] = { 0 };
 522     mbstate_t s = { 0 };
 523
 524     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) 0);
 525     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) 0);
 526     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t) 0);
 527     TEST_COMPARE (c8rtomb (buf, u8s[3], &s), (size_t) 4);
 528     TEST_COMPARE (buf[0], (char) 0xF0);
 529     TEST_COMPARE (buf[1], (char) 0x90);
 530     TEST_COMPARE (buf[2], (char) 0x80);
 531     TEST_COMPARE (buf[3], (char) 0x80);
 532     TEST_VERIFY (mbsinit (&s));
 533   }
 534
 535   /* Last character in the code point range that maps to four code units.  */
 536   {
 537     /* U+10FFFF => 0xF4 0x8F 0xBF 0xBF */
 538     const char8_t *u8s = (const char8_t*) u8"\U0010FFFF";
 539     char buf[MB_LEN_MAX] = { 0 };
 540     mbstate_t s = { 0 };
 541
 542     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) 0);
 543     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) 0);
 544     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t) 0);
 545     TEST_COMPARE (c8rtomb (buf, u8s[3], &s), (size_t) 4);
 546     TEST_COMPARE (buf[0], (char) 0xF4);
 547     TEST_COMPARE (buf[1], (char) 0x8F);
 548     TEST_COMPARE (buf[2], (char) 0xBF);
 549     TEST_COMPARE (buf[3], (char) 0xBF);
 550     TEST_VERIFY (mbsinit (&s));
 551   }
 552
 553   return 0;
 554 }
 555
 556 static int
 557 test_big5_hkscs (void)
 558 {
 559   xsetlocale (LC_ALL, "zh_HK.BIG5-HKSCS");
 560
 561   /* A pair of two byte UTF-8 code unit sequences that map a Unicode code
 562      point and combining character to a single double byte character.  */
 563   {
 564     /* U+00CA U+0304 => 0x88 0x62 */
 565     const char8_t *u8s = (const char8_t*) u8"\u00CA\u0304";
 566     char buf[MB_LEN_MAX] = { 0 };
 567     mbstate_t s = { 0 };
 568
 569     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) 0);
 570     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) 0);
 571     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t) 0);
 572     TEST_COMPARE (c8rtomb (buf, u8s[3], &s), (size_t) 2);
 573     TEST_COMPARE (buf[0], (char) 0x88);
 574     TEST_COMPARE (buf[1], (char) 0x62);
 575     TEST_VERIFY (mbsinit (&s));
 576   }
 577
 578   /* Another pair of two byte UTF-8 code unit sequences that map a Unicode code
 579      point and combining character to a single double byte character.  */
 580   {
 581     /* U+00EA U+030C => 0x88 0xA5 */
 582     const char8_t *u8s = (const char8_t*) u8"\u00EA\u030C";
 583     char buf[MB_LEN_MAX] = { 0 };
 584     mbstate_t s = { 0 };
 585
 586     TEST_COMPARE (c8rtomb (buf, u8s[0], &s), (size_t) 0);
 587     TEST_COMPARE (c8rtomb (buf, u8s[1], &s), (size_t) 0);
 588     TEST_COMPARE (c8rtomb (buf, u8s[2], &s), (size_t) 0);
 589     TEST_COMPARE (c8rtomb (buf, u8s[3], &s), (size_t) 2);
 590     TEST_COMPARE (buf[0], (char) 0x88);
 591     TEST_COMPARE (buf[1], (char) 0xA5);
 592     TEST_VERIFY (mbsinit (&s));
 593   }
 594
 595   return 0;
 596 }
 597
 598 static int
 599 do_test (void)
 600 {
 601   test_truncated_code_unit_sequence ();
 602   test_invalid_trailing_code_unit_sequence ();
 603   test_lone_trailing_code_units ();
 604   test_overlong_encoding ();
 605   test_surrogate_range ();
 606   test_out_of_range_encoding ();
 607   test_null_output_buffer ();
 608   test_utf8 ();
 609   test_big5_hkscs ();
 610   return 0;
 611 }
 612
 613 #include <support/test-driver.c>