wcsmbs/bits/wchar2.h

   1 /* Checking macros for wchar functions.
   2    Copyright (C) 2005-2017 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _WCHAR_H
  20 # error "Never include <bits/wchar2.h> directly; use <wchar.h> instead."
  21 #endif
  22
  23
  24 extern wchar_t *__wmemcpy_chk (wchar_t *__restrict __s1,
  25                                const wchar_t *__restrict __s2, size_t __n,
  26                                size_t __ns1) __THROW;
  27 extern wchar_t *__REDIRECT_NTH (__wmemcpy_alias,
  28                                 (wchar_t *__restrict __s1,
  29                                  const wchar_t *__restrict __s2, size_t __n),
  30                                 wmemcpy);
  31 extern wchar_t *__REDIRECT_NTH (__wmemcpy_chk_warn,
  32                                 (wchar_t *__restrict __s1,
  33                                  const wchar_t *__restrict __s2, size_t __n,
  34                                  size_t __ns1), __wmemcpy_chk)
  35      __warnattr ("wmemcpy called with length bigger than size of destination "
  36                  "buffer");
  37
  38 __fortify_function wchar_t *
  39 __NTH (wmemcpy (wchar_t *__restrict __s1, const wchar_t *__restrict __s2,
  40                 size_t __n))
  41 {
  42   if (__bos0 (__s1) != (size_t) -1)
  43     {
  44       if (!__builtin_constant_p (__n))
  45         return __wmemcpy_chk (__s1, __s2, __n,
  46                               __bos0 (__s1) / sizeof (wchar_t));
  47
  48       if (__n > __bos0 (__s1) / sizeof (wchar_t))
  49         return __wmemcpy_chk_warn (__s1, __s2, __n,
  50                                    __bos0 (__s1) / sizeof (wchar_t));
  51     }
  52   return __wmemcpy_alias (__s1, __s2, __n);
  53 }
  54
  55
  56 extern wchar_t *__wmemmove_chk (wchar_t *__s1, const wchar_t *__s2,
  57                                 size_t __n, size_t __ns1) __THROW;
  58 extern wchar_t *__REDIRECT_NTH (__wmemmove_alias, (wchar_t *__s1,
  59                                                    const wchar_t *__s2,
  60                                                    size_t __n), wmemmove);
  61 extern wchar_t *__REDIRECT_NTH (__wmemmove_chk_warn,
  62                                 (wchar_t *__s1, const wchar_t *__s2,
  63                                  size_t __n, size_t __ns1), __wmemmove_chk)
  64      __warnattr ("wmemmove called with length bigger than size of destination "
  65                  "buffer");
  66
  67 __fortify_function wchar_t *
  68 __NTH (wmemmove (wchar_t *__s1, const wchar_t *__s2, size_t __n))
  69 {
  70   if (__bos0 (__s1) != (size_t) -1)
  71     {
  72       if (!__builtin_constant_p (__n))
  73         return __wmemmove_chk (__s1, __s2, __n,
  74                                __bos0 (__s1) / sizeof (wchar_t));
  75
  76       if (__n > __bos0 (__s1) / sizeof (wchar_t))
  77         return __wmemmove_chk_warn (__s1, __s2, __n,
  78                                     __bos0 (__s1) / sizeof (wchar_t));
  79     }
  80   return __wmemmove_alias (__s1, __s2, __n);
  81 }
  82
  83
  84 #ifdef __USE_GNU
  85 extern wchar_t *__wmempcpy_chk (wchar_t *__restrict __s1,
  86                                 const wchar_t *__restrict __s2, size_t __n,
  87                                 size_t __ns1) __THROW;
  88 extern wchar_t *__REDIRECT_NTH (__wmempcpy_alias,
  89                                 (wchar_t *__restrict __s1,
  90                                  const wchar_t *__restrict __s2,
  91                                  size_t __n), wmempcpy);
  92 extern wchar_t *__REDIRECT_NTH (__wmempcpy_chk_warn,
  93                                 (wchar_t *__restrict __s1,
  94                                  const wchar_t *__restrict __s2, size_t __n,
  95                                  size_t __ns1), __wmempcpy_chk)
  96      __warnattr ("wmempcpy called with length bigger than size of destination "
  97                  "buffer");
  98
  99 __fortify_function wchar_t *
 100 __NTH (wmempcpy (wchar_t *__restrict __s1, const wchar_t *__restrict __s2,
 101                  size_t __n))
 102 {
 103   if (__bos0 (__s1) != (size_t) -1)
 104     {
 105       if (!__builtin_constant_p (__n))
 106         return __wmempcpy_chk (__s1, __s2, __n,
 107                                __bos0 (__s1) / sizeof (wchar_t));
 108
 109       if (__n > __bos0 (__s1) / sizeof (wchar_t))
 110         return __wmempcpy_chk_warn (__s1, __s2, __n,
 111                                     __bos0 (__s1) / sizeof (wchar_t));
 112     }
 113   return __wmempcpy_alias (__s1, __s2, __n);
 114 }
 115 #endif
 116
 117
 118 extern wchar_t *__wmemset_chk (wchar_t *__s, wchar_t __c, size_t __n,
 119                                size_t __ns) __THROW;
 120 extern wchar_t *__REDIRECT_NTH (__wmemset_alias, (wchar_t *__s, wchar_t __c,
 121                                                   size_t __n), wmemset);
 122 extern wchar_t *__REDIRECT_NTH (__wmemset_chk_warn,
 123                                 (wchar_t *__s, wchar_t __c, size_t __n,
 124                                  size_t __ns), __wmemset_chk)
 125      __warnattr ("wmemset called with length bigger than size of destination "
 126                  "buffer");
 127
 128 __fortify_function wchar_t *
 129 __NTH (wmemset (wchar_t *__s, wchar_t __c, size_t __n))
 130 {
 131   if (__bos0 (__s) != (size_t) -1)
 132     {
 133       if (!__builtin_constant_p (__n))
 134         return __wmemset_chk (__s, __c, __n, __bos0 (__s) / sizeof (wchar_t));
 135
 136       if (__n > __bos0 (__s) / sizeof (wchar_t))
 137         return __wmemset_chk_warn (__s, __c, __n,
 138                                    __bos0 (__s) / sizeof (wchar_t));
 139     }
 140   return __wmemset_alias (__s, __c, __n);
 141 }
 142
 143
 144 extern wchar_t *__wcscpy_chk (wchar_t *__restrict __dest,
 145                               const wchar_t *__restrict __src,
 146                               size_t __n) __THROW;
 147 extern wchar_t *__REDIRECT_NTH (__wcscpy_alias,
 148                                 (wchar_t *__restrict __dest,
 149                                  const wchar_t *__restrict __src), wcscpy);
 150
 151 __fortify_function wchar_t *
 152 __NTH (wcscpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
 153 {
 154   if (__bos (__dest) != (size_t) -1)
 155     return __wcscpy_chk (__dest, __src, __bos (__dest) / sizeof (wchar_t));
 156   return __wcscpy_alias (__dest, __src);
 157 }
 158
 159
 160 extern wchar_t *__wcpcpy_chk (wchar_t *__restrict __dest,
 161                               const wchar_t *__restrict __src,
 162                               size_t __destlen) __THROW;
 163 extern wchar_t *__REDIRECT_NTH (__wcpcpy_alias,
 164                                 (wchar_t *__restrict __dest,
 165                                  const wchar_t *__restrict __src), wcpcpy);
 166
 167 __fortify_function wchar_t *
 168 __NTH (wcpcpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
 169 {
 170   if (__bos (__dest) != (size_t) -1)
 171     return __wcpcpy_chk (__dest, __src, __bos (__dest) / sizeof (wchar_t));
 172   return __wcpcpy_alias (__dest, __src);
 173 }
 174
 175
 176 extern wchar_t *__wcsncpy_chk (wchar_t *__restrict __dest,
 177                                const wchar_t *__restrict __src, size_t __n,
 178                                size_t __destlen) __THROW;
 179 extern wchar_t *__REDIRECT_NTH (__wcsncpy_alias,
 180                                 (wchar_t *__restrict __dest,
 181                                  const wchar_t *__restrict __src,
 182                                  size_t __n), wcsncpy);
 183 extern wchar_t *__REDIRECT_NTH (__wcsncpy_chk_warn,
 184                                 (wchar_t *__restrict __dest,
 185                                  const wchar_t *__restrict __src,
 186                                  size_t __n, size_t __destlen), __wcsncpy_chk)
 187      __warnattr ("wcsncpy called with length bigger than size of destination "
 188                  "buffer");
 189
 190 __fortify_function wchar_t *
 191 __NTH (wcsncpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
 192                 size_t __n))
 193 {
 194   if (__bos (__dest) != (size_t) -1)
 195     {
 196       if (!__builtin_constant_p (__n))
 197         return __wcsncpy_chk (__dest, __src, __n,
 198                               __bos (__dest) / sizeof (wchar_t));
 199       if (__n > __bos (__dest) / sizeof (wchar_t))
 200         return __wcsncpy_chk_warn (__dest, __src, __n,
 201                                    __bos (__dest) / sizeof (wchar_t));
 202     }
 203   return __wcsncpy_alias (__dest, __src, __n);
 204 }
 205
 206
 207 extern wchar_t *__wcpncpy_chk (wchar_t *__restrict __dest,
 208                                const wchar_t *__restrict __src, size_t __n,
 209                                size_t __destlen) __THROW;
 210 extern wchar_t *__REDIRECT_NTH (__wcpncpy_alias,
 211                                 (wchar_t *__restrict __dest,
 212                                  const wchar_t *__restrict __src,
 213                                  size_t __n), wcpncpy);
 214 extern wchar_t *__REDIRECT_NTH (__wcpncpy_chk_warn,
 215                                 (wchar_t *__restrict __dest,
 216                                  const wchar_t *__restrict __src,
 217                                  size_t __n, size_t __destlen), __wcpncpy_chk)
 218      __warnattr ("wcpncpy called with length bigger than size of destination "
 219                  "buffer");
 220
 221 __fortify_function wchar_t *
 222 __NTH (wcpncpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
 223                 size_t __n))
 224 {
 225   if (__bos (__dest) != (size_t) -1)
 226     {
 227       if (!__builtin_constant_p (__n))
 228         return __wcpncpy_chk (__dest, __src, __n,
 229                               __bos (__dest) / sizeof (wchar_t));
 230       if (__n > __bos (__dest) / sizeof (wchar_t))
 231         return __wcpncpy_chk_warn (__dest, __src, __n,
 232                                    __bos (__dest) / sizeof (wchar_t));
 233     }
 234   return __wcpncpy_alias (__dest, __src, __n);
 235 }
 236
 237
 238 extern wchar_t *__wcscat_chk (wchar_t *__restrict __dest,
 239                               const wchar_t *__restrict __src,
 240                               size_t __destlen) __THROW;
 241 extern wchar_t *__REDIRECT_NTH (__wcscat_alias,
 242                                 (wchar_t *__restrict __dest,
 243                                  const wchar_t *__restrict __src), wcscat);
 244
 245 __fortify_function wchar_t *
 246 __NTH (wcscat (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
 247 {
 248   if (__bos (__dest) != (size_t) -1)
 249     return __wcscat_chk (__dest, __src, __bos (__dest) / sizeof (wchar_t));
 250   return __wcscat_alias (__dest, __src);
 251 }
 252
 253
 254 extern wchar_t *__wcsncat_chk (wchar_t *__restrict __dest,
 255                                const wchar_t *__restrict __src,
 256                                size_t __n, size_t __destlen) __THROW;
 257 extern wchar_t *__REDIRECT_NTH (__wcsncat_alias,
 258                                 (wchar_t *__restrict __dest,
 259                                  const wchar_t *__restrict __src,
 260                                  size_t __n), wcsncat);
 261
 262 __fortify_function wchar_t *
 263 __NTH (wcsncat (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
 264                 size_t __n))
 265 {
 266   if (__bos (__dest) != (size_t) -1)
 267     return __wcsncat_chk (__dest, __src, __n,
 268                           __bos (__dest) / sizeof (wchar_t));
 269   return __wcsncat_alias (__dest, __src, __n);
 270 }
 271
 272
 273 extern int __swprintf_chk (wchar_t *__restrict __s, size_t __n,
 274                            int __flag, size_t __s_len,
 275                            const wchar_t *__restrict __format, ...)
 276      __THROW /* __attribute__ ((__format__ (__wprintf__, 5, 6))) */;
 277
 278 extern int __REDIRECT_NTH_LDBL (__swprintf_alias,
 279                                 (wchar_t *__restrict __s, size_t __n,
 280                                  const wchar_t *__restrict __fmt, ...),
 281                                 swprintf);
 282
 283 #ifdef __va_arg_pack
 284 __fortify_function int
 285 __NTH (swprintf (wchar_t *__restrict __s, size_t __n,
 286                  const wchar_t *__restrict __fmt, ...))
 287 {
 288   if (__bos (__s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
 289     return __swprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
 290                            __bos (__s) / sizeof (wchar_t),
 291                            __fmt, __va_arg_pack ());
 292   return __swprintf_alias (__s, __n, __fmt, __va_arg_pack ());
 293 }
 294 #elif !defined __cplusplus
 295 /* XXX We might want to have support in gcc for swprintf.  */
 296 # define swprintf(s, n, ...) \
 297   (__bos (s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1                        \
 298    ? __swprintf_chk (s, n, __USE_FORTIFY_LEVEL - 1,                           \
 299                      __bos (s) / sizeof (wchar_t), __VA_ARGS__)               \
 300    : swprintf (s, n, __VA_ARGS__))
 301 #endif
 302
 303 extern int __vswprintf_chk (wchar_t *__restrict __s, size_t __n,
 304                             int __flag, size_t __s_len,
 305                             const wchar_t *__restrict __format,
 306                             __gnuc_va_list __arg)
 307      __THROW /* __attribute__ ((__format__ (__wprintf__, 5, 0))) */;
 308
 309 extern int __REDIRECT_NTH_LDBL (__vswprintf_alias,
 310                                 (wchar_t *__restrict __s, size_t __n,
 311                                  const wchar_t *__restrict __fmt,
 312                                  __gnuc_va_list __ap), vswprintf);
 313
 314 __fortify_function int
 315 __NTH (vswprintf (wchar_t *__restrict __s, size_t __n,
 316                   const wchar_t *__restrict __fmt, __gnuc_va_list __ap))
 317 {
 318   if (__bos (__s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
 319     return __vswprintf_chk (__s, __n,  __USE_FORTIFY_LEVEL - 1,
 320                             __bos (__s) / sizeof (wchar_t), __fmt, __ap);
 321   return __vswprintf_alias (__s, __n, __fmt, __ap);
 322 }
 323
 324
 325 #if __USE_FORTIFY_LEVEL > 1
 326
 327 extern int __fwprintf_chk (__FILE *__restrict __stream, int __flag,
 328                            const wchar_t *__restrict __format, ...);
 329 extern int __wprintf_chk (int __flag, const wchar_t *__restrict __format,
 330                           ...);
 331 extern int __vfwprintf_chk (__FILE *__restrict __stream, int __flag,
 332                             const wchar_t *__restrict __format,
 333                             __gnuc_va_list __ap);
 334 extern int __vwprintf_chk (int __flag, const wchar_t *__restrict __format,
 335                            __gnuc_va_list __ap);
 336
 337 # ifdef __va_arg_pack
 338 __fortify_function int
 339 wprintf (const wchar_t *__restrict __fmt, ...)
 340 {
 341   return __wprintf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __va_arg_pack ());
 342 }
 343
 344 __fortify_function int
 345 fwprintf (__FILE *__restrict __stream, const wchar_t *__restrict __fmt, ...)
 346 {
 347   return __fwprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt,
 348                          __va_arg_pack ());
 349 }
 350 # elif !defined __cplusplus
 351 #  define wprintf(...) \
 352   __wprintf_chk (__USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
 353 #  define fwprintf(stream, ...) \
 354   __fwprintf_chk (stream, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
 355 # endif
 356
 357 __fortify_function int
 358 vwprintf (const wchar_t *__restrict __fmt, __gnuc_va_list __ap)
 359 {
 360   return __vwprintf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __ap);
 361 }
 362
 363 __fortify_function int
 364 vfwprintf (__FILE *__restrict __stream,
 365            const wchar_t *__restrict __fmt, __gnuc_va_list __ap)
 366 {
 367   return __vfwprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt, __ap);
 368 }
 369
 370 #endif
 371
 372 extern wchar_t *__fgetws_chk (wchar_t *__restrict __s, size_t __size, int __n,
 373                               __FILE *__restrict __stream) __wur;
 374 extern wchar_t *__REDIRECT (__fgetws_alias,
 375                             (wchar_t *__restrict __s, int __n,
 376                              __FILE *__restrict __stream), fgetws) __wur;
 377 extern wchar_t *__REDIRECT (__fgetws_chk_warn,
 378                             (wchar_t *__restrict __s, size_t __size, int __n,
 379                              __FILE *__restrict __stream), __fgetws_chk)
 380      __wur __warnattr ("fgetws called with bigger size than length "
 381                        "of destination buffer");
 382
 383 __fortify_function __wur wchar_t *
 384 fgetws (wchar_t *__restrict __s, int __n, __FILE *__restrict __stream)
 385 {
 386   if (__bos (__s) != (size_t) -1)
 387     {
 388       if (!__builtin_constant_p (__n) || __n <= 0)
 389         return __fgetws_chk (__s, __bos (__s) / sizeof (wchar_t),
 390                              __n, __stream);
 391
 392       if ((size_t) __n > __bos (__s) / sizeof (wchar_t))
 393         return __fgetws_chk_warn (__s, __bos (__s) / sizeof (wchar_t),
 394                                   __n, __stream);
 395     }
 396   return __fgetws_alias (__s, __n, __stream);
 397 }
 398
 399 #ifdef __USE_GNU
 400 extern wchar_t *__fgetws_unlocked_chk (wchar_t *__restrict __s, size_t __size,
 401                                        int __n, __FILE *__restrict __stream)
 402   __wur;
 403 extern wchar_t *__REDIRECT (__fgetws_unlocked_alias,
 404                             (wchar_t *__restrict __s, int __n,
 405                              __FILE *__restrict __stream), fgetws_unlocked)
 406   __wur;
 407 extern wchar_t *__REDIRECT (__fgetws_unlocked_chk_warn,
 408                             (wchar_t *__restrict __s, size_t __size, int __n,
 409                              __FILE *__restrict __stream),
 410                             __fgetws_unlocked_chk)
 411      __wur __warnattr ("fgetws_unlocked called with bigger size than length "
 412                        "of destination buffer");
 413
 414 __fortify_function __wur wchar_t *
 415 fgetws_unlocked (wchar_t *__restrict __s, int __n, __FILE *__restrict __stream)
 416 {
 417   if (__bos (__s) != (size_t) -1)
 418     {
 419       if (!__builtin_constant_p (__n) || __n <= 0)
 420         return __fgetws_unlocked_chk (__s, __bos (__s) / sizeof (wchar_t),
 421                                       __n, __stream);
 422
 423       if ((size_t) __n > __bos (__s) / sizeof (wchar_t))
 424         return __fgetws_unlocked_chk_warn (__s, __bos (__s) / sizeof (wchar_t),
 425                                            __n, __stream);
 426     }
 427   return __fgetws_unlocked_alias (__s, __n, __stream);
 428 }
 429 #endif
 430
 431
 432 extern size_t __wcrtomb_chk (char *__restrict __s, wchar_t __wchar,
 433                              mbstate_t *__restrict __p,
 434                              size_t __buflen) __THROW __wur;
 435 extern size_t __REDIRECT_NTH (__wcrtomb_alias,
 436                               (char *__restrict __s, wchar_t __wchar,
 437                                mbstate_t *__restrict __ps), wcrtomb) __wur;
 438
 439 __fortify_function __wur size_t
 440 __NTH (wcrtomb (char *__restrict __s, wchar_t __wchar,
 441                 mbstate_t *__restrict __ps))
 442 {
 443   /* We would have to include <limits.h> to get a definition of MB_LEN_MAX.
 444      But this would only disturb the namespace.  So we define our own
 445      version here.  */
 446 #define __WCHAR_MB_LEN_MAX      16
 447 #if defined MB_LEN_MAX && MB_LEN_MAX != __WCHAR_MB_LEN_MAX
 448 # error "Assumed value of MB_LEN_MAX wrong"
 449 #endif
 450   if (__bos (__s) != (size_t) -1 && __WCHAR_MB_LEN_MAX > __bos (__s))
 451     return __wcrtomb_chk (__s, __wchar, __ps, __bos (__s));
 452   return __wcrtomb_alias (__s, __wchar, __ps);
 453 }
 454
 455
 456 extern size_t __mbsrtowcs_chk (wchar_t *__restrict __dst,
 457                                const char **__restrict __src,
 458                                size_t __len, mbstate_t *__restrict __ps,
 459                                size_t __dstlen) __THROW;
 460 extern size_t __REDIRECT_NTH (__mbsrtowcs_alias,
 461                               (wchar_t *__restrict __dst,
 462                                const char **__restrict __src,
 463                                size_t __len, mbstate_t *__restrict __ps),
 464                               mbsrtowcs);
 465 extern size_t __REDIRECT_NTH (__mbsrtowcs_chk_warn,
 466                               (wchar_t *__restrict __dst,
 467                                const char **__restrict __src,
 468                                size_t __len, mbstate_t *__restrict __ps,
 469                                size_t __dstlen), __mbsrtowcs_chk)
 470      __warnattr ("mbsrtowcs called with dst buffer smaller than len "
 471                  "* sizeof (wchar_t)");
 472
 473 __fortify_function size_t
 474 __NTH (mbsrtowcs (wchar_t *__restrict __dst, const char **__restrict __src,
 475                   size_t __len, mbstate_t *__restrict __ps))
 476 {
 477   if (__bos (__dst) != (size_t) -1)
 478     {
 479       if (!__builtin_constant_p (__len))
 480         return __mbsrtowcs_chk (__dst, __src, __len, __ps,
 481                                 __bos (__dst) / sizeof (wchar_t));
 482
 483       if (__len > __bos (__dst) / sizeof (wchar_t))
 484         return __mbsrtowcs_chk_warn (__dst, __src, __len, __ps,
 485                                      __bos (__dst) / sizeof (wchar_t));
 486     }
 487   return __mbsrtowcs_alias (__dst, __src, __len, __ps);
 488 }
 489
 490
 491 extern size_t __wcsrtombs_chk (char *__restrict __dst,
 492                                const wchar_t **__restrict __src,
 493                                size_t __len, mbstate_t *__restrict __ps,
 494                                size_t __dstlen) __THROW;
 495 extern size_t __REDIRECT_NTH (__wcsrtombs_alias,
 496                               (char *__restrict __dst,
 497                                const wchar_t **__restrict __src,
 498                                size_t __len, mbstate_t *__restrict __ps),
 499                               wcsrtombs);
 500 extern size_t __REDIRECT_NTH (__wcsrtombs_chk_warn,
 501                               (char *__restrict __dst,
 502                                const wchar_t **__restrict __src,
 503                                size_t __len, mbstate_t *__restrict __ps,
 504                                size_t __dstlen), __wcsrtombs_chk)
 505     __warnattr ("wcsrtombs called with dst buffer smaller than len");
 506
 507 __fortify_function size_t
 508 __NTH (wcsrtombs (char *__restrict __dst, const wchar_t **__restrict __src,
 509                   size_t __len, mbstate_t *__restrict __ps))
 510 {
 511   if (__bos (__dst) != (size_t) -1)
 512     {
 513       if (!__builtin_constant_p (__len))
 514         return __wcsrtombs_chk (__dst, __src, __len, __ps, __bos (__dst));
 515
 516       if (__len > __bos (__dst))
 517         return __wcsrtombs_chk_warn (__dst, __src, __len, __ps, __bos (__dst));
 518     }
 519   return __wcsrtombs_alias (__dst, __src, __len, __ps);
 520 }
 521
 522
 523 #ifdef __USE_GNU
 524 extern size_t __mbsnrtowcs_chk (wchar_t *__restrict __dst,
 525                                 const char **__restrict __src, size_t __nmc,
 526                                 size_t __len, mbstate_t *__restrict __ps,
 527                                 size_t __dstlen) __THROW;
 528 extern size_t __REDIRECT_NTH (__mbsnrtowcs_alias,
 529                               (wchar_t *__restrict __dst,
 530                                const char **__restrict __src, size_t __nmc,
 531                                size_t __len, mbstate_t *__restrict __ps),
 532                               mbsnrtowcs);
 533 extern size_t __REDIRECT_NTH (__mbsnrtowcs_chk_warn,
 534                               (wchar_t *__restrict __dst,
 535                                const char **__restrict __src, size_t __nmc,
 536                                size_t __len, mbstate_t *__restrict __ps,
 537                                size_t __dstlen), __mbsnrtowcs_chk)
 538      __warnattr ("mbsnrtowcs called with dst buffer smaller than len "
 539                  "* sizeof (wchar_t)");
 540
 541 __fortify_function size_t
 542 __NTH (mbsnrtowcs (wchar_t *__restrict __dst, const char **__restrict __src,
 543                    size_t __nmc, size_t __len, mbstate_t *__restrict __ps))
 544 {
 545   if (__bos (__dst) != (size_t) -1)
 546     {
 547       if (!__builtin_constant_p (__len))
 548         return __mbsnrtowcs_chk (__dst, __src, __nmc, __len, __ps,
 549                                  __bos (__dst) / sizeof (wchar_t));
 550
 551       if (__len > __bos (__dst) / sizeof (wchar_t))
 552         return __mbsnrtowcs_chk_warn (__dst, __src, __nmc, __len, __ps,
 553                                       __bos (__dst) / sizeof (wchar_t));
 554     }
 555   return __mbsnrtowcs_alias (__dst, __src, __nmc, __len, __ps);
 556 }
 557
 558
 559 extern size_t __wcsnrtombs_chk (char *__restrict __dst,
 560                                 const wchar_t **__restrict __src,
 561                                 size_t __nwc, size_t __len,
 562                                 mbstate_t *__restrict __ps, size_t __dstlen)
 563      __THROW;
 564 extern size_t __REDIRECT_NTH (__wcsnrtombs_alias,
 565                               (char *__restrict __dst,
 566                                const wchar_t **__restrict __src,
 567                                size_t __nwc, size_t __len,
 568                                mbstate_t *__restrict __ps), wcsnrtombs);
 569 extern size_t __REDIRECT_NTH (__wcsnrtombs_chk_warn,
 570                               (char *__restrict __dst,
 571                                const wchar_t **__restrict __src,
 572                                size_t __nwc, size_t __len,
 573                                mbstate_t *__restrict __ps,
 574                                size_t __dstlen), __wcsnrtombs_chk)
 575      __warnattr ("wcsnrtombs called with dst buffer smaller than len");
 576
 577 __fortify_function size_t
 578 __NTH (wcsnrtombs (char *__restrict __dst, const wchar_t **__restrict __src,
 579                    size_t __nwc, size_t __len, mbstate_t *__restrict __ps))
 580 {
 581   if (__bos (__dst) != (size_t) -1)
 582     {
 583       if (!__builtin_constant_p (__len))
 584         return __wcsnrtombs_chk (__dst, __src, __nwc, __len, __ps,
 585                                  __bos (__dst));
 586
 587       if (__len > __bos (__dst))
 588         return __wcsnrtombs_chk_warn (__dst, __src, __nwc, __len, __ps,
 589                                       __bos (__dst));
 590     }
 591   return __wcsnrtombs_alias (__dst, __src, __nwc, __len, __ps);
 592 }
 593 #endif