lib/string.in.h

   1 /* A GNU-like <string.h>.
   2
   3    Copyright (C) 1995-1996, 2001-2017 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #if __GNUC__ >= 3
  19 @PRAGMA_SYSTEM_HEADER@
  20 #endif
  21 @PRAGMA_COLUMNS@
  22
  23 #if defined _GL_ALREADY_INCLUDING_STRING_H
  24 /* Special invocation convention:
  25    - On OS X/NetBSD we have a sequence of nested includes
  26        <string.h> -> <strings.h> -> "string.h"
  27      In this situation system _chk variants due to -D_FORTIFY_SOURCE
  28      might be used after any replacements defined here.  */
  29
  30 #@INCLUDE_NEXT@ @NEXT_STRING_H@
  31
  32 #else
  33 /* Normal invocation convention.  */
  34
  35 #ifndef _@GUARD_PREFIX@_STRING_H
  36
  37 #define _GL_ALREADY_INCLUDING_STRING_H
  38
  39 /* The include_next requires a split double-inclusion guard.  */
  40 #@INCLUDE_NEXT@ @NEXT_STRING_H@
  41
  42 #undef _GL_ALREADY_INCLUDING_STRING_H
  43
  44 #ifndef _@GUARD_PREFIX@_STRING_H
  45 #define _@GUARD_PREFIX@_STRING_H
  46
  47 /* NetBSD 5.0 mis-defines NULL.  */
  48 #include <stddef.h>
  49
  50 /* MirBSD defines mbslen as a macro.  */
  51 #if @GNULIB_MBSLEN@ && defined __MirBSD__
  52 # include <wchar.h>
  53 #endif
  54
  55 /* The __attribute__ feature is available in gcc versions 2.5 and later.
  56    The attribute __pure__ was added in gcc 2.96.  */
  57 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
  58 # define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
  59 #else
  60 # define _GL_ATTRIBUTE_PURE /* empty */
  61 #endif
  62
  63 /* NetBSD 5.0 declares strsignal in <unistd.h>, not in <string.h>.  */
  64 /* But in any case avoid namespace pollution on glibc systems.  */
  65 #if (@GNULIB_STRSIGNAL@ || defined GNULIB_POSIXCHECK) && defined __NetBSD__ \
  66     && ! defined __GLIBC__
  67 # include <unistd.h>
  68 #endif
  69
  70 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
  71
  72 /* The definition of _GL_ARG_NONNULL is copied here.  */
  73
  74 /* The definition of _GL_WARN_ON_USE is copied here.  */
  75
  76
  77 /* Clear a block of memory.  The compiler will not delete a call to
  78    this function, even if the block is dead after the call.  */
  79 #if @GNULIB_EXPLICIT_BZERO@
  80 # if ! @HAVE_EXPLICIT_BZERO@
  81 _GL_FUNCDECL_SYS (explicit_bzero, void,
  82                   (void *__dest, size_t __n) _GL_ARG_NONNULL ((1)));
  83 # endif
  84 _GL_CXXALIAS_SYS (explicit_bzero, void, (void *__dest, size_t __n));
  85 _GL_CXXALIASWARN (explicit_bzero);
  86 #elif defined GNULIB_POSIXCHECK
  87 # undef explicit_bzero
  88 # if HAVE_RAW_DECL_EXPLICIT_BZERO
  89 _GL_WARN_ON_USE (explicit_bzero, "explicit_bzero is unportable - "
  90                  "use gnulib module explicit_bzero for portability");
  91 # endif
  92 #endif
  93
  94 /* Find the index of the least-significant set bit.  */
  95 #if @GNULIB_FFSL@
  96 # if !@HAVE_FFSL@
  97 _GL_FUNCDECL_SYS (ffsl, int, (long int i));
  98 # endif
  99 _GL_CXXALIAS_SYS (ffsl, int, (long int i));
 100 _GL_CXXALIASWARN (ffsl);
 101 #elif defined GNULIB_POSIXCHECK
 102 # undef ffsl
 103 # if HAVE_RAW_DECL_FFSL
 104 _GL_WARN_ON_USE (ffsl, "ffsl is not portable - use the ffsl module");
 105 # endif
 106 #endif
 107
 108
 109 /* Find the index of the least-significant set bit.  */
 110 #if @GNULIB_FFSLL@
 111 # if !@HAVE_FFSLL@
 112 _GL_FUNCDECL_SYS (ffsll, int, (long long int i));
 113 # endif
 114 _GL_CXXALIAS_SYS (ffsll, int, (long long int i));
 115 _GL_CXXALIASWARN (ffsll);
 116 #elif defined GNULIB_POSIXCHECK
 117 # undef ffsll
 118 # if HAVE_RAW_DECL_FFSLL
 119 _GL_WARN_ON_USE (ffsll, "ffsll is not portable - use the ffsll module");
 120 # endif
 121 #endif
 122
 123
 124 /* Return the first instance of C within N bytes of S, or NULL.  */
 125 #if @GNULIB_MEMCHR@
 126 # if @REPLACE_MEMCHR@
 127 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 128 #   define memchr rpl_memchr
 129 #  endif
 130 _GL_FUNCDECL_RPL (memchr, void *, (void const *__s, int __c, size_t __n)
 131                                   _GL_ATTRIBUTE_PURE
 132                                   _GL_ARG_NONNULL ((1)));
 133 _GL_CXXALIAS_RPL (memchr, void *, (void const *__s, int __c, size_t __n));
 134 # else
 135 #  if ! @HAVE_MEMCHR@
 136 _GL_FUNCDECL_SYS (memchr, void *, (void const *__s, int __c, size_t __n)
 137                                   _GL_ATTRIBUTE_PURE
 138                                   _GL_ARG_NONNULL ((1)));
 139 #  endif
 140   /* On some systems, this function is defined as an overloaded function:
 141        extern "C" { const void * std::memchr (const void *, int, size_t); }
 142        extern "C++" { void * std::memchr (void *, int, size_t); }  */
 143 _GL_CXXALIAS_SYS_CAST2 (memchr,
 144                         void *, (void const *__s, int __c, size_t __n),
 145                         void const *, (void const *__s, int __c, size_t __n));
 146 # endif
 147 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 148      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 149 _GL_CXXALIASWARN1 (memchr, void *, (void *__s, int __c, size_t __n));
 150 _GL_CXXALIASWARN1 (memchr, void const *,
 151                    (void const *__s, int __c, size_t __n));
 152 # else
 153 _GL_CXXALIASWARN (memchr);
 154 # endif
 155 #elif defined GNULIB_POSIXCHECK
 156 # undef memchr
 157 /* Assume memchr is always declared.  */
 158 _GL_WARN_ON_USE (memchr, "memchr has platform-specific bugs - "
 159                  "use gnulib module memchr for portability" );
 160 #endif
 161
 162 /* Return the first occurrence of NEEDLE in HAYSTACK.  */
 163 #if @GNULIB_MEMMEM@
 164 # if @REPLACE_MEMMEM@
 165 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 166 #   define memmem rpl_memmem
 167 #  endif
 168 _GL_FUNCDECL_RPL (memmem, void *,
 169                   (void const *__haystack, size_t __haystack_len,
 170                    void const *__needle, size_t __needle_len)
 171                   _GL_ATTRIBUTE_PURE
 172                   _GL_ARG_NONNULL ((1, 3)));
 173 _GL_CXXALIAS_RPL (memmem, void *,
 174                   (void const *__haystack, size_t __haystack_len,
 175                    void const *__needle, size_t __needle_len));
 176 # else
 177 #  if ! @HAVE_DECL_MEMMEM@
 178 _GL_FUNCDECL_SYS (memmem, void *,
 179                   (void const *__haystack, size_t __haystack_len,
 180                    void const *__needle, size_t __needle_len)
 181                   _GL_ATTRIBUTE_PURE
 182                   _GL_ARG_NONNULL ((1, 3)));
 183 #  endif
 184 _GL_CXXALIAS_SYS (memmem, void *,
 185                   (void const *__haystack, size_t __haystack_len,
 186                    void const *__needle, size_t __needle_len));
 187 # endif
 188 _GL_CXXALIASWARN (memmem);
 189 #elif defined GNULIB_POSIXCHECK
 190 # undef memmem
 191 # if HAVE_RAW_DECL_MEMMEM
 192 _GL_WARN_ON_USE (memmem, "memmem is unportable and often quadratic - "
 193                  "use gnulib module memmem-simple for portability, "
 194                  "and module memmem for speed" );
 195 # endif
 196 #endif
 197
 198 /* Copy N bytes of SRC to DEST, return pointer to bytes after the
 199    last written byte.  */
 200 #if @GNULIB_MEMPCPY@
 201 # if ! @HAVE_MEMPCPY@
 202 _GL_FUNCDECL_SYS (mempcpy, void *,
 203                   (void *restrict __dest, void const *restrict __src,
 204                    size_t __n)
 205                   _GL_ARG_NONNULL ((1, 2)));
 206 # endif
 207 _GL_CXXALIAS_SYS (mempcpy, void *,
 208                   (void *restrict __dest, void const *restrict __src,
 209                    size_t __n));
 210 _GL_CXXALIASWARN (mempcpy);
 211 #elif defined GNULIB_POSIXCHECK
 212 # undef mempcpy
 213 # if HAVE_RAW_DECL_MEMPCPY
 214 _GL_WARN_ON_USE (mempcpy, "mempcpy is unportable - "
 215                  "use gnulib module mempcpy for portability");
 216 # endif
 217 #endif
 218
 219 /* Search backwards through a block for a byte (specified as an int).  */
 220 #if @GNULIB_MEMRCHR@
 221 # if ! @HAVE_DECL_MEMRCHR@
 222 _GL_FUNCDECL_SYS (memrchr, void *, (void const *, int, size_t)
 223                                    _GL_ATTRIBUTE_PURE
 224                                    _GL_ARG_NONNULL ((1)));
 225 # endif
 226   /* On some systems, this function is defined as an overloaded function:
 227        extern "C++" { const void * std::memrchr (const void *, int, size_t); }
 228        extern "C++" { void * std::memrchr (void *, int, size_t); }  */
 229 _GL_CXXALIAS_SYS_CAST2 (memrchr,
 230                         void *, (void const *, int, size_t),
 231                         void const *, (void const *, int, size_t));
 232 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 233      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 234 _GL_CXXALIASWARN1 (memrchr, void *, (void *, int, size_t));
 235 _GL_CXXALIASWARN1 (memrchr, void const *, (void const *, int, size_t));
 236 # else
 237 _GL_CXXALIASWARN (memrchr);
 238 # endif
 239 #elif defined GNULIB_POSIXCHECK
 240 # undef memrchr
 241 # if HAVE_RAW_DECL_MEMRCHR
 242 _GL_WARN_ON_USE (memrchr, "memrchr is unportable - "
 243                  "use gnulib module memrchr for portability");
 244 # endif
 245 #endif
 246
 247 /* Find the first occurrence of C in S.  More efficient than
 248    memchr(S,C,N), at the expense of undefined behavior if C does not
 249    occur within N bytes.  */
 250 #if @GNULIB_RAWMEMCHR@
 251 # if ! @HAVE_RAWMEMCHR@
 252 _GL_FUNCDECL_SYS (rawmemchr, void *, (void const *__s, int __c_in)
 253                                      _GL_ATTRIBUTE_PURE
 254                                      _GL_ARG_NONNULL ((1)));
 255 # endif
 256   /* On some systems, this function is defined as an overloaded function:
 257        extern "C++" { const void * std::rawmemchr (const void *, int); }
 258        extern "C++" { void * std::rawmemchr (void *, int); }  */
 259 _GL_CXXALIAS_SYS_CAST2 (rawmemchr,
 260                         void *, (void const *__s, int __c_in),
 261                         void const *, (void const *__s, int __c_in));
 262 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 263      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 264 _GL_CXXALIASWARN1 (rawmemchr, void *, (void *__s, int __c_in));
 265 _GL_CXXALIASWARN1 (rawmemchr, void const *, (void const *__s, int __c_in));
 266 # else
 267 _GL_CXXALIASWARN (rawmemchr);
 268 # endif
 269 #elif defined GNULIB_POSIXCHECK
 270 # undef rawmemchr
 271 # if HAVE_RAW_DECL_RAWMEMCHR
 272 _GL_WARN_ON_USE (rawmemchr, "rawmemchr is unportable - "
 273                  "use gnulib module rawmemchr for portability");
 274 # endif
 275 #endif
 276
 277 /* Copy SRC to DST, returning the address of the terminating '\0' in DST.  */
 278 #if @GNULIB_STPCPY@
 279 # if ! @HAVE_STPCPY@
 280 _GL_FUNCDECL_SYS (stpcpy, char *,
 281                   (char *restrict __dst, char const *restrict __src)
 282                   _GL_ARG_NONNULL ((1, 2)));
 283 # endif
 284 _GL_CXXALIAS_SYS (stpcpy, char *,
 285                   (char *restrict __dst, char const *restrict __src));
 286 _GL_CXXALIASWARN (stpcpy);
 287 #elif defined GNULIB_POSIXCHECK
 288 # undef stpcpy
 289 # if HAVE_RAW_DECL_STPCPY
 290 _GL_WARN_ON_USE (stpcpy, "stpcpy is unportable - "
 291                  "use gnulib module stpcpy for portability");
 292 # endif
 293 #endif
 294
 295 /* Copy no more than N bytes of SRC to DST, returning a pointer past the
 296    last non-NUL byte written into DST.  */
 297 #if @GNULIB_STPNCPY@
 298 # if @REPLACE_STPNCPY@
 299 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 300 #   undef stpncpy
 301 #   define stpncpy rpl_stpncpy
 302 #  endif
 303 _GL_FUNCDECL_RPL (stpncpy, char *,
 304                   (char *restrict __dst, char const *restrict __src,
 305                    size_t __n)
 306                   _GL_ARG_NONNULL ((1, 2)));
 307 _GL_CXXALIAS_RPL (stpncpy, char *,
 308                   (char *restrict __dst, char const *restrict __src,
 309                    size_t __n));
 310 # else
 311 #  if ! @HAVE_STPNCPY@
 312 _GL_FUNCDECL_SYS (stpncpy, char *,
 313                   (char *restrict __dst, char const *restrict __src,
 314                    size_t __n)
 315                   _GL_ARG_NONNULL ((1, 2)));
 316 #  endif
 317 _GL_CXXALIAS_SYS (stpncpy, char *,
 318                   (char *restrict __dst, char const *restrict __src,
 319                    size_t __n));
 320 # endif
 321 _GL_CXXALIASWARN (stpncpy);
 322 #elif defined GNULIB_POSIXCHECK
 323 # undef stpncpy
 324 # if HAVE_RAW_DECL_STPNCPY
 325 _GL_WARN_ON_USE (stpncpy, "stpncpy is unportable - "
 326                  "use gnulib module stpncpy for portability");
 327 # endif
 328 #endif
 329
 330 #if defined GNULIB_POSIXCHECK
 331 /* strchr() does not work with multibyte strings if the locale encoding is
 332    GB18030 and the character to be searched is a digit.  */
 333 # undef strchr
 334 /* Assume strchr is always declared.  */
 335 _GL_WARN_ON_USE (strchr, "strchr cannot work correctly on character strings "
 336                  "in some multibyte locales - "
 337                  "use mbschr if you care about internationalization");
 338 #endif
 339
 340 /* Find the first occurrence of C in S or the final NUL byte.  */
 341 #if @GNULIB_STRCHRNUL@
 342 # if @REPLACE_STRCHRNUL@
 343 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 344 #   define strchrnul rpl_strchrnul
 345 #  endif
 346 _GL_FUNCDECL_RPL (strchrnul, char *, (const char *__s, int __c_in)
 347                                      _GL_ATTRIBUTE_PURE
 348                                      _GL_ARG_NONNULL ((1)));
 349 _GL_CXXALIAS_RPL (strchrnul, char *,
 350                   (const char *str, int ch));
 351 # else
 352 #  if ! @HAVE_STRCHRNUL@
 353 _GL_FUNCDECL_SYS (strchrnul, char *, (char const *__s, int __c_in)
 354                                      _GL_ATTRIBUTE_PURE
 355                                      _GL_ARG_NONNULL ((1)));
 356 #  endif
 357   /* On some systems, this function is defined as an overloaded function:
 358        extern "C++" { const char * std::strchrnul (const char *, int); }
 359        extern "C++" { char * std::strchrnul (char *, int); }  */
 360 _GL_CXXALIAS_SYS_CAST2 (strchrnul,
 361                         char *, (char const *__s, int __c_in),
 362                         char const *, (char const *__s, int __c_in));
 363 # endif
 364 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 365      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 366 _GL_CXXALIASWARN1 (strchrnul, char *, (char *__s, int __c_in));
 367 _GL_CXXALIASWARN1 (strchrnul, char const *, (char const *__s, int __c_in));
 368 # else
 369 _GL_CXXALIASWARN (strchrnul);
 370 # endif
 371 #elif defined GNULIB_POSIXCHECK
 372 # undef strchrnul
 373 # if HAVE_RAW_DECL_STRCHRNUL
 374 _GL_WARN_ON_USE (strchrnul, "strchrnul is unportable - "
 375                  "use gnulib module strchrnul for portability");
 376 # endif
 377 #endif
 378
 379 /* Duplicate S, returning an identical malloc'd string.  */
 380 #if @GNULIB_STRDUP@
 381 # if @REPLACE_STRDUP@
 382 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 383 #   undef strdup
 384 #   define strdup rpl_strdup
 385 #  endif
 386 _GL_FUNCDECL_RPL (strdup, char *, (char const *__s) _GL_ARG_NONNULL ((1)));
 387 _GL_CXXALIAS_RPL (strdup, char *, (char const *__s));
 388 # else
 389 #  if defined __cplusplus && defined GNULIB_NAMESPACE && defined strdup
 390     /* strdup exists as a function and as a macro.  Get rid of the macro.  */
 391 #   undef strdup
 392 #  endif
 393 #  if !(@HAVE_DECL_STRDUP@ || defined strdup)
 394 _GL_FUNCDECL_SYS (strdup, char *, (char const *__s) _GL_ARG_NONNULL ((1)));
 395 #  endif
 396 _GL_CXXALIAS_SYS (strdup, char *, (char const *__s));
 397 # endif
 398 _GL_CXXALIASWARN (strdup);
 399 #elif defined GNULIB_POSIXCHECK
 400 # undef strdup
 401 # if HAVE_RAW_DECL_STRDUP
 402 _GL_WARN_ON_USE (strdup, "strdup is unportable - "
 403                  "use gnulib module strdup for portability");
 404 # endif
 405 #endif
 406
 407 /* Append no more than N characters from SRC onto DEST.  */
 408 #if @GNULIB_STRNCAT@
 409 # if @REPLACE_STRNCAT@
 410 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 411 #   undef strncat
 412 #   define strncat rpl_strncat
 413 #  endif
 414 _GL_FUNCDECL_RPL (strncat, char *, (char *dest, const char *src, size_t n)
 415                                    _GL_ARG_NONNULL ((1, 2)));
 416 _GL_CXXALIAS_RPL (strncat, char *, (char *dest, const char *src, size_t n));
 417 # else
 418 _GL_CXXALIAS_SYS (strncat, char *, (char *dest, const char *src, size_t n));
 419 # endif
 420 _GL_CXXALIASWARN (strncat);
 421 #elif defined GNULIB_POSIXCHECK
 422 # undef strncat
 423 # if HAVE_RAW_DECL_STRNCAT
 424 _GL_WARN_ON_USE (strncat, "strncat is unportable - "
 425                  "use gnulib module strncat for portability");
 426 # endif
 427 #endif
 428
 429 /* Return a newly allocated copy of at most N bytes of STRING.  */
 430 #if @GNULIB_STRNDUP@
 431 # if @REPLACE_STRNDUP@
 432 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 433 #   undef strndup
 434 #   define strndup rpl_strndup
 435 #  endif
 436 _GL_FUNCDECL_RPL (strndup, char *, (char const *__s, size_t __n)
 437                                    _GL_ARG_NONNULL ((1)));
 438 _GL_CXXALIAS_RPL (strndup, char *, (char const *__s, size_t __n));
 439 # else
 440 #  if ! @HAVE_DECL_STRNDUP@
 441 _GL_FUNCDECL_SYS (strndup, char *, (char const *__s, size_t __n)
 442                                    _GL_ARG_NONNULL ((1)));
 443 #  endif
 444 _GL_CXXALIAS_SYS (strndup, char *, (char const *__s, size_t __n));
 445 # endif
 446 _GL_CXXALIASWARN (strndup);
 447 #elif defined GNULIB_POSIXCHECK
 448 # undef strndup
 449 # if HAVE_RAW_DECL_STRNDUP
 450 _GL_WARN_ON_USE (strndup, "strndup is unportable - "
 451                  "use gnulib module strndup for portability");
 452 # endif
 453 #endif
 454
 455 /* Find the length (number of bytes) of STRING, but scan at most
 456    MAXLEN bytes.  If no '\0' terminator is found in that many bytes,
 457    return MAXLEN.  */
 458 #if @GNULIB_STRNLEN@
 459 # if @REPLACE_STRNLEN@
 460 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 461 #   undef strnlen
 462 #   define strnlen rpl_strnlen
 463 #  endif
 464 _GL_FUNCDECL_RPL (strnlen, size_t, (char const *__s, size_t __maxlen)
 465                                    _GL_ATTRIBUTE_PURE
 466                                    _GL_ARG_NONNULL ((1)));
 467 _GL_CXXALIAS_RPL (strnlen, size_t, (char const *__s, size_t __maxlen));
 468 # else
 469 #  if ! @HAVE_DECL_STRNLEN@
 470 _GL_FUNCDECL_SYS (strnlen, size_t, (char const *__s, size_t __maxlen)
 471                                    _GL_ATTRIBUTE_PURE
 472                                    _GL_ARG_NONNULL ((1)));
 473 #  endif
 474 _GL_CXXALIAS_SYS (strnlen, size_t, (char const *__s, size_t __maxlen));
 475 # endif
 476 _GL_CXXALIASWARN (strnlen);
 477 #elif defined GNULIB_POSIXCHECK
 478 # undef strnlen
 479 # if HAVE_RAW_DECL_STRNLEN
 480 _GL_WARN_ON_USE (strnlen, "strnlen is unportable - "
 481                  "use gnulib module strnlen for portability");
 482 # endif
 483 #endif
 484
 485 #if defined GNULIB_POSIXCHECK
 486 /* strcspn() assumes the second argument is a list of single-byte characters.
 487    Even in this simple case, it does not work with multibyte strings if the
 488    locale encoding is GB18030 and one of the characters to be searched is a
 489    digit.  */
 490 # undef strcspn
 491 /* Assume strcspn is always declared.  */
 492 _GL_WARN_ON_USE (strcspn, "strcspn cannot work correctly on character strings "
 493                  "in multibyte locales - "
 494                  "use mbscspn if you care about internationalization");
 495 #endif
 496
 497 /* Find the first occurrence in S of any character in ACCEPT.  */
 498 #if @GNULIB_STRPBRK@
 499 # if ! @HAVE_STRPBRK@
 500 _GL_FUNCDECL_SYS (strpbrk, char *, (char const *__s, char const *__accept)
 501                                    _GL_ATTRIBUTE_PURE
 502                                    _GL_ARG_NONNULL ((1, 2)));
 503 # endif
 504   /* On some systems, this function is defined as an overloaded function:
 505        extern "C" { const char * strpbrk (const char *, const char *); }
 506        extern "C++" { char * strpbrk (char *, const char *); }  */
 507 _GL_CXXALIAS_SYS_CAST2 (strpbrk,
 508                         char *, (char const *__s, char const *__accept),
 509                         const char *, (char const *__s, char const *__accept));
 510 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 511      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 512 _GL_CXXALIASWARN1 (strpbrk, char *, (char *__s, char const *__accept));
 513 _GL_CXXALIASWARN1 (strpbrk, char const *,
 514                    (char const *__s, char const *__accept));
 515 # else
 516 _GL_CXXALIASWARN (strpbrk);
 517 # endif
 518 # if defined GNULIB_POSIXCHECK
 519 /* strpbrk() assumes the second argument is a list of single-byte characters.
 520    Even in this simple case, it does not work with multibyte strings if the
 521    locale encoding is GB18030 and one of the characters to be searched is a
 522    digit.  */
 523 #  undef strpbrk
 524 _GL_WARN_ON_USE (strpbrk, "strpbrk cannot work correctly on character strings "
 525                  "in multibyte locales - "
 526                  "use mbspbrk if you care about internationalization");
 527 # endif
 528 #elif defined GNULIB_POSIXCHECK
 529 # undef strpbrk
 530 # if HAVE_RAW_DECL_STRPBRK
 531 _GL_WARN_ON_USE (strpbrk, "strpbrk is unportable - "
 532                  "use gnulib module strpbrk for portability");
 533 # endif
 534 #endif
 535
 536 #if defined GNULIB_POSIXCHECK
 537 /* strspn() assumes the second argument is a list of single-byte characters.
 538    Even in this simple case, it cannot work with multibyte strings.  */
 539 # undef strspn
 540 /* Assume strspn is always declared.  */
 541 _GL_WARN_ON_USE (strspn, "strspn cannot work correctly on character strings "
 542                  "in multibyte locales - "
 543                  "use mbsspn if you care about internationalization");
 544 #endif
 545
 546 #if defined GNULIB_POSIXCHECK
 547 /* strrchr() does not work with multibyte strings if the locale encoding is
 548    GB18030 and the character to be searched is a digit.  */
 549 # undef strrchr
 550 /* Assume strrchr is always declared.  */
 551 _GL_WARN_ON_USE (strrchr, "strrchr cannot work correctly on character strings "
 552                  "in some multibyte locales - "
 553                  "use mbsrchr if you care about internationalization");
 554 #endif
 555
 556 /* Search the next delimiter (char listed in DELIM) starting at *STRINGP.
 557    If one is found, overwrite it with a NUL, and advance *STRINGP
 558    to point to the next char after it.  Otherwise, set *STRINGP to NULL.
 559    If *STRINGP was already NULL, nothing happens.
 560    Return the old value of *STRINGP.
 561
 562    This is a variant of strtok() that is multithread-safe and supports
 563    empty fields.
 564
 565    Caveat: It modifies the original string.
 566    Caveat: These functions cannot be used on constant strings.
 567    Caveat: The identity of the delimiting character is lost.
 568    Caveat: It doesn't work with multibyte strings unless all of the delimiter
 569            characters are ASCII characters < 0x30.
 570
 571    See also strtok_r().  */
 572 #if @GNULIB_STRSEP@
 573 # if ! @HAVE_STRSEP@
 574 _GL_FUNCDECL_SYS (strsep, char *,
 575                   (char **restrict __stringp, char const *restrict __delim)
 576                   _GL_ARG_NONNULL ((1, 2)));
 577 # endif
 578 _GL_CXXALIAS_SYS (strsep, char *,
 579                   (char **restrict __stringp, char const *restrict __delim));
 580 _GL_CXXALIASWARN (strsep);
 581 # if defined GNULIB_POSIXCHECK
 582 #  undef strsep
 583 _GL_WARN_ON_USE (strsep, "strsep cannot work correctly on character strings "
 584                  "in multibyte locales - "
 585                  "use mbssep if you care about internationalization");
 586 # endif
 587 #elif defined GNULIB_POSIXCHECK
 588 # undef strsep
 589 # if HAVE_RAW_DECL_STRSEP
 590 _GL_WARN_ON_USE (strsep, "strsep is unportable - "
 591                  "use gnulib module strsep for portability");
 592 # endif
 593 #endif
 594
 595 #if @GNULIB_STRSTR@
 596 # if @REPLACE_STRSTR@
 597 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 598 #   define strstr rpl_strstr
 599 #  endif
 600 _GL_FUNCDECL_RPL (strstr, char *, (const char *haystack, const char *needle)
 601                                   _GL_ATTRIBUTE_PURE
 602                                   _GL_ARG_NONNULL ((1, 2)));
 603 _GL_CXXALIAS_RPL (strstr, char *, (const char *haystack, const char *needle));
 604 # else
 605   /* On some systems, this function is defined as an overloaded function:
 606        extern "C++" { const char * strstr (const char *, const char *); }
 607        extern "C++" { char * strstr (char *, const char *); }  */
 608 _GL_CXXALIAS_SYS_CAST2 (strstr,
 609                         char *, (const char *haystack, const char *needle),
 610                         const char *, (const char *haystack, const char *needle));
 611 # endif
 612 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 613      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 614 _GL_CXXALIASWARN1 (strstr, char *, (char *haystack, const char *needle));
 615 _GL_CXXALIASWARN1 (strstr, const char *,
 616                    (const char *haystack, const char *needle));
 617 # else
 618 _GL_CXXALIASWARN (strstr);
 619 # endif
 620 #elif defined GNULIB_POSIXCHECK
 621 /* strstr() does not work with multibyte strings if the locale encoding is
 622    different from UTF-8:
 623    POSIX says that it operates on "strings", and "string" in POSIX is defined
 624    as a sequence of bytes, not of characters.  */
 625 # undef strstr
 626 /* Assume strstr is always declared.  */
 627 _GL_WARN_ON_USE (strstr, "strstr is quadratic on many systems, and cannot "
 628                  "work correctly on character strings in most "
 629                  "multibyte locales - "
 630                  "use mbsstr if you care about internationalization, "
 631                  "or use strstr if you care about speed");
 632 #endif
 633
 634 /* Find the first occurrence of NEEDLE in HAYSTACK, using case-insensitive
 635    comparison.  */
 636 #if @GNULIB_STRCASESTR@
 637 # if @REPLACE_STRCASESTR@
 638 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 639 #   define strcasestr rpl_strcasestr
 640 #  endif
 641 _GL_FUNCDECL_RPL (strcasestr, char *,
 642                   (const char *haystack, const char *needle)
 643                   _GL_ATTRIBUTE_PURE
 644                   _GL_ARG_NONNULL ((1, 2)));
 645 _GL_CXXALIAS_RPL (strcasestr, char *,
 646                   (const char *haystack, const char *needle));
 647 # else
 648 #  if ! @HAVE_STRCASESTR@
 649 _GL_FUNCDECL_SYS (strcasestr, char *,
 650                   (const char *haystack, const char *needle)
 651                   _GL_ATTRIBUTE_PURE
 652                   _GL_ARG_NONNULL ((1, 2)));
 653 #  endif
 654   /* On some systems, this function is defined as an overloaded function:
 655        extern "C++" { const char * strcasestr (const char *, const char *); }
 656        extern "C++" { char * strcasestr (char *, const char *); }  */
 657 _GL_CXXALIAS_SYS_CAST2 (strcasestr,
 658                         char *, (const char *haystack, const char *needle),
 659                         const char *, (const char *haystack, const char *needle));
 660 # endif
 661 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 662      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 663 _GL_CXXALIASWARN1 (strcasestr, char *, (char *haystack, const char *needle));
 664 _GL_CXXALIASWARN1 (strcasestr, const char *,
 665                    (const char *haystack, const char *needle));
 666 # else
 667 _GL_CXXALIASWARN (strcasestr);
 668 # endif
 669 #elif defined GNULIB_POSIXCHECK
 670 /* strcasestr() does not work with multibyte strings:
 671    It is a glibc extension, and glibc implements it only for unibyte
 672    locales.  */
 673 # undef strcasestr
 674 # if HAVE_RAW_DECL_STRCASESTR
 675 _GL_WARN_ON_USE (strcasestr, "strcasestr does work correctly on character "
 676                  "strings in multibyte locales - "
 677                  "use mbscasestr if you care about "
 678                  "internationalization, or use c-strcasestr if you want "
 679                  "a locale independent function");
 680 # endif
 681 #endif
 682
 683 /* Parse S into tokens separated by characters in DELIM.
 684    If S is NULL, the saved pointer in SAVE_PTR is used as
 685    the next starting point.  For example:
 686         char s[] = "-abc-=-def";
 687         char *sp;
 688         x = strtok_r(s, "-", &sp);      // x = "abc", sp = "=-def"
 689         x = strtok_r(NULL, "-=", &sp);  // x = "def", sp = NULL
 690         x = strtok_r(NULL, "=", &sp);   // x = NULL
 691                 // s = "abc\0-def\0"
 692
 693    This is a variant of strtok() that is multithread-safe.
 694
 695    For the POSIX documentation for this function, see:
 696    http://www.opengroup.org/susv3xsh/strtok.html
 697
 698    Caveat: It modifies the original string.
 699    Caveat: These functions cannot be used on constant strings.
 700    Caveat: The identity of the delimiting character is lost.
 701    Caveat: It doesn't work with multibyte strings unless all of the delimiter
 702            characters are ASCII characters < 0x30.
 703
 704    See also strsep().  */
 705 #if @GNULIB_STRTOK_R@
 706 # if @REPLACE_STRTOK_R@
 707 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 708 #   undef strtok_r
 709 #   define strtok_r rpl_strtok_r
 710 #  endif
 711 _GL_FUNCDECL_RPL (strtok_r, char *,
 712                   (char *restrict s, char const *restrict delim,
 713                    char **restrict save_ptr)
 714                   _GL_ARG_NONNULL ((2, 3)));
 715 _GL_CXXALIAS_RPL (strtok_r, char *,
 716                   (char *restrict s, char const *restrict delim,
 717                    char **restrict save_ptr));
 718 # else
 719 #  if @UNDEFINE_STRTOK_R@ || defined GNULIB_POSIXCHECK
 720 #   undef strtok_r
 721 #  endif
 722 #  if ! @HAVE_DECL_STRTOK_R@
 723 _GL_FUNCDECL_SYS (strtok_r, char *,
 724                   (char *restrict s, char const *restrict delim,
 725                    char **restrict save_ptr)
 726                   _GL_ARG_NONNULL ((2, 3)));
 727 #  endif
 728 _GL_CXXALIAS_SYS (strtok_r, char *,
 729                   (char *restrict s, char const *restrict delim,
 730                    char **restrict save_ptr));
 731 # endif
 732 _GL_CXXALIASWARN (strtok_r);
 733 # if defined GNULIB_POSIXCHECK
 734 _GL_WARN_ON_USE (strtok_r, "strtok_r cannot work correctly on character "
 735                  "strings in multibyte locales - "
 736                  "use mbstok_r if you care about internationalization");
 737 # endif
 738 #elif defined GNULIB_POSIXCHECK
 739 # undef strtok_r
 740 # if HAVE_RAW_DECL_STRTOK_R
 741 _GL_WARN_ON_USE (strtok_r, "strtok_r is unportable - "
 742                  "use gnulib module strtok_r for portability");
 743 # endif
 744 #endif
 745
 746
 747 /* The following functions are not specified by POSIX.  They are gnulib
 748    extensions.  */
 749
 750 #if @GNULIB_MBSLEN@
 751 /* Return the number of multibyte characters in the character string STRING.
 752    This considers multibyte characters, unlike strlen, which counts bytes.  */
 753 # ifdef __MirBSD__  /* MirBSD defines mbslen as a macro.  Override it.  */
 754 #  undef mbslen
 755 # endif
 756 # if @HAVE_MBSLEN@  /* AIX, OSF/1, MirBSD define mbslen already in libc.  */
 757 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 758 #   define mbslen rpl_mbslen
 759 #  endif
 760 _GL_FUNCDECL_RPL (mbslen, size_t, (const char *string)
 761                                   _GL_ATTRIBUTE_PURE
 762                                   _GL_ARG_NONNULL ((1)));
 763 _GL_CXXALIAS_RPL (mbslen, size_t, (const char *string));
 764 # else
 765 _GL_FUNCDECL_SYS (mbslen, size_t, (const char *string)
 766                                   _GL_ATTRIBUTE_PURE
 767                                   _GL_ARG_NONNULL ((1)));
 768 _GL_CXXALIAS_SYS (mbslen, size_t, (const char *string));
 769 # endif
 770 _GL_CXXALIASWARN (mbslen);
 771 #endif
 772
 773 #if @GNULIB_MBSNLEN@
 774 /* Return the number of multibyte characters in the character string starting
 775    at STRING and ending at STRING + LEN.  */
 776 _GL_EXTERN_C size_t mbsnlen (const char *string, size_t len)
 777      _GL_ATTRIBUTE_PURE
 778      _GL_ARG_NONNULL ((1));
 779 #endif
 780
 781 #if @GNULIB_MBSCHR@
 782 /* Locate the first single-byte character C in the character string STRING,
 783    and return a pointer to it.  Return NULL if C is not found in STRING.
 784    Unlike strchr(), this function works correctly in multibyte locales with
 785    encodings such as GB18030.  */
 786 # if defined __hpux
 787 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 788 #   define mbschr rpl_mbschr /* avoid collision with HP-UX function */
 789 #  endif
 790 _GL_FUNCDECL_RPL (mbschr, char *, (const char *string, int c)
 791                                   _GL_ATTRIBUTE_PURE
 792                                   _GL_ARG_NONNULL ((1)));
 793 _GL_CXXALIAS_RPL (mbschr, char *, (const char *string, int c));
 794 # else
 795 _GL_FUNCDECL_SYS (mbschr, char *, (const char *string, int c)
 796                                   _GL_ATTRIBUTE_PURE
 797                                   _GL_ARG_NONNULL ((1)));
 798 _GL_CXXALIAS_SYS (mbschr, char *, (const char *string, int c));
 799 # endif
 800 _GL_CXXALIASWARN (mbschr);
 801 #endif
 802
 803 #if @GNULIB_MBSRCHR@
 804 /* Locate the last single-byte character C in the character string STRING,
 805    and return a pointer to it.  Return NULL if C is not found in STRING.
 806    Unlike strrchr(), this function works correctly in multibyte locales with
 807    encodings such as GB18030.  */
 808 # if defined __hpux || defined __INTERIX
 809 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 810 #   define mbsrchr rpl_mbsrchr /* avoid collision with system function */
 811 #  endif
 812 _GL_FUNCDECL_RPL (mbsrchr, char *, (const char *string, int c)
 813                                    _GL_ATTRIBUTE_PURE
 814                                    _GL_ARG_NONNULL ((1)));
 815 _GL_CXXALIAS_RPL (mbsrchr, char *, (const char *string, int c));
 816 # else
 817 _GL_FUNCDECL_SYS (mbsrchr, char *, (const char *string, int c)
 818                                    _GL_ATTRIBUTE_PURE
 819                                    _GL_ARG_NONNULL ((1)));
 820 _GL_CXXALIAS_SYS (mbsrchr, char *, (const char *string, int c));
 821 # endif
 822 _GL_CXXALIASWARN (mbsrchr);
 823 #endif
 824
 825 #if @GNULIB_MBSSTR@
 826 /* Find the first occurrence of the character string NEEDLE in the character
 827    string HAYSTACK.  Return NULL if NEEDLE is not found in HAYSTACK.
 828    Unlike strstr(), this function works correctly in multibyte locales with
 829    encodings different from UTF-8.  */
 830 _GL_EXTERN_C char * mbsstr (const char *haystack, const char *needle)
 831      _GL_ATTRIBUTE_PURE
 832      _GL_ARG_NONNULL ((1, 2));
 833 #endif
 834
 835 #if @GNULIB_MBSCASECMP@
 836 /* Compare the character strings S1 and S2, ignoring case, returning less than,
 837    equal to or greater than zero if S1 is lexicographically less than, equal to
 838    or greater than S2.
 839    Note: This function may, in multibyte locales, return 0 for strings of
 840    different lengths!
 841    Unlike strcasecmp(), this function works correctly in multibyte locales.  */
 842 _GL_EXTERN_C int mbscasecmp (const char *s1, const char *s2)
 843      _GL_ATTRIBUTE_PURE
 844      _GL_ARG_NONNULL ((1, 2));
 845 #endif
 846
 847 #if @GNULIB_MBSNCASECMP@
 848 /* Compare the initial segment of the character string S1 consisting of at most
 849    N characters with the initial segment of the character string S2 consisting
 850    of at most N characters, ignoring case, returning less than, equal to or
 851    greater than zero if the initial segment of S1 is lexicographically less
 852    than, equal to or greater than the initial segment of S2.
 853    Note: This function may, in multibyte locales, return 0 for initial segments
 854    of different lengths!
 855    Unlike strncasecmp(), this function works correctly in multibyte locales.
 856    But beware that N is not a byte count but a character count!  */
 857 _GL_EXTERN_C int mbsncasecmp (const char *s1, const char *s2, size_t n)
 858      _GL_ATTRIBUTE_PURE
 859      _GL_ARG_NONNULL ((1, 2));
 860 #endif
 861
 862 #if @GNULIB_MBSPCASECMP@
 863 /* Compare the initial segment of the character string STRING consisting of
 864    at most mbslen (PREFIX) characters with the character string PREFIX,
 865    ignoring case.  If the two match, return a pointer to the first byte
 866    after this prefix in STRING.  Otherwise, return NULL.
 867    Note: This function may, in multibyte locales, return non-NULL if STRING
 868    is of smaller length than PREFIX!
 869    Unlike strncasecmp(), this function works correctly in multibyte
 870    locales.  */
 871 _GL_EXTERN_C char * mbspcasecmp (const char *string, const char *prefix)
 872      _GL_ATTRIBUTE_PURE
 873      _GL_ARG_NONNULL ((1, 2));
 874 #endif
 875
 876 #if @GNULIB_MBSCASESTR@
 877 /* Find the first occurrence of the character string NEEDLE in the character
 878    string HAYSTACK, using case-insensitive comparison.
 879    Note: This function may, in multibyte locales, return success even if
 880    strlen (haystack) < strlen (needle) !
 881    Unlike strcasestr(), this function works correctly in multibyte locales.  */
 882 _GL_EXTERN_C char * mbscasestr (const char *haystack, const char *needle)
 883      _GL_ATTRIBUTE_PURE
 884      _GL_ARG_NONNULL ((1, 2));
 885 #endif
 886
 887 #if @GNULIB_MBSCSPN@
 888 /* Find the first occurrence in the character string STRING of any character
 889    in the character string ACCEPT.  Return the number of bytes from the
 890    beginning of the string to this occurrence, or to the end of the string
 891    if none exists.
 892    Unlike strcspn(), this function works correctly in multibyte locales.  */
 893 _GL_EXTERN_C size_t mbscspn (const char *string, const char *accept)
 894      _GL_ATTRIBUTE_PURE
 895      _GL_ARG_NONNULL ((1, 2));
 896 #endif
 897
 898 #if @GNULIB_MBSPBRK@
 899 /* Find the first occurrence in the character string STRING of any character
 900    in the character string ACCEPT.  Return the pointer to it, or NULL if none
 901    exists.
 902    Unlike strpbrk(), this function works correctly in multibyte locales.  */
 903 # if defined __hpux
 904 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 905 #   define mbspbrk rpl_mbspbrk /* avoid collision with HP-UX function */
 906 #  endif
 907 _GL_FUNCDECL_RPL (mbspbrk, char *, (const char *string, const char *accept)
 908                                    _GL_ATTRIBUTE_PURE
 909                                    _GL_ARG_NONNULL ((1, 2)));
 910 _GL_CXXALIAS_RPL (mbspbrk, char *, (const char *string, const char *accept));
 911 # else
 912 _GL_FUNCDECL_SYS (mbspbrk, char *, (const char *string, const char *accept)
 913                                    _GL_ATTRIBUTE_PURE
 914                                    _GL_ARG_NONNULL ((1, 2)));
 915 _GL_CXXALIAS_SYS (mbspbrk, char *, (const char *string, const char *accept));
 916 # endif
 917 _GL_CXXALIASWARN (mbspbrk);
 918 #endif
 919
 920 #if @GNULIB_MBSSPN@
 921 /* Find the first occurrence in the character string STRING of any character
 922    not in the character string REJECT.  Return the number of bytes from the
 923    beginning of the string to this occurrence, or to the end of the string
 924    if none exists.
 925    Unlike strspn(), this function works correctly in multibyte locales.  */
 926 _GL_EXTERN_C size_t mbsspn (const char *string, const char *reject)
 927      _GL_ATTRIBUTE_PURE
 928      _GL_ARG_NONNULL ((1, 2));
 929 #endif
 930
 931 #if @GNULIB_MBSSEP@
 932 /* Search the next delimiter (multibyte character listed in the character
 933    string DELIM) starting at the character string *STRINGP.
 934    If one is found, overwrite it with a NUL, and advance *STRINGP to point
 935    to the next multibyte character after it.  Otherwise, set *STRINGP to NULL.
 936    If *STRINGP was already NULL, nothing happens.
 937    Return the old value of *STRINGP.
 938
 939    This is a variant of mbstok_r() that supports empty fields.
 940
 941    Caveat: It modifies the original string.
 942    Caveat: These functions cannot be used on constant strings.
 943    Caveat: The identity of the delimiting character is lost.
 944
 945    See also mbstok_r().  */
 946 _GL_EXTERN_C char * mbssep (char **stringp, const char *delim)
 947      _GL_ARG_NONNULL ((1, 2));
 948 #endif
 949
 950 #if @GNULIB_MBSTOK_R@
 951 /* Parse the character string STRING into tokens separated by characters in
 952    the character string DELIM.
 953    If STRING is NULL, the saved pointer in SAVE_PTR is used as
 954    the next starting point.  For example:
 955         char s[] = "-abc-=-def";
 956         char *sp;
 957         x = mbstok_r(s, "-", &sp);      // x = "abc", sp = "=-def"
 958         x = mbstok_r(NULL, "-=", &sp);  // x = "def", sp = NULL
 959         x = mbstok_r(NULL, "=", &sp);   // x = NULL
 960                 // s = "abc\0-def\0"
 961
 962    Caveat: It modifies the original string.
 963    Caveat: These functions cannot be used on constant strings.
 964    Caveat: The identity of the delimiting character is lost.
 965
 966    See also mbssep().  */
 967 _GL_EXTERN_C char * mbstok_r (char *string, const char *delim, char **save_ptr)
 968      _GL_ARG_NONNULL ((2, 3));
 969 #endif
 970
 971 /* Map any int, typically from errno, into an error message.  */
 972 #if @GNULIB_STRERROR@
 973 # if @REPLACE_STRERROR@
 974 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 975 #   undef strerror
 976 #   define strerror rpl_strerror
 977 #  endif
 978 _GL_FUNCDECL_RPL (strerror, char *, (int));
 979 _GL_CXXALIAS_RPL (strerror, char *, (int));
 980 # else
 981 _GL_CXXALIAS_SYS (strerror, char *, (int));
 982 # endif
 983 _GL_CXXALIASWARN (strerror);
 984 #elif defined GNULIB_POSIXCHECK
 985 # undef strerror
 986 /* Assume strerror is always declared.  */
 987 _GL_WARN_ON_USE (strerror, "strerror is unportable - "
 988                  "use gnulib module strerror to guarantee non-NULL result");
 989 #endif
 990
 991 /* Map any int, typically from errno, into an error message.  Multithread-safe.
 992    Uses the POSIX declaration, not the glibc declaration.  */
 993 #if @GNULIB_STRERROR_R@
 994 # if @REPLACE_STRERROR_R@
 995 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 996 #   undef strerror_r
 997 #   define strerror_r rpl_strerror_r
 998 #  endif
 999 _GL_FUNCDECL_RPL (strerror_r, int, (int errnum, char *buf, size_t buflen)
1000                                    _GL_ARG_NONNULL ((2)));
1001 _GL_CXXALIAS_RPL (strerror_r, int, (int errnum, char *buf, size_t buflen));
1002 # else
1003 #  if !@HAVE_DECL_STRERROR_R@
1004 _GL_FUNCDECL_SYS (strerror_r, int, (int errnum, char *buf, size_t buflen)
1005                                    _GL_ARG_NONNULL ((2)));
1006 #  endif
1007 _GL_CXXALIAS_SYS (strerror_r, int, (int errnum, char *buf, size_t buflen));
1008 # endif
1009 # if @HAVE_DECL_STRERROR_R@
1010 _GL_CXXALIASWARN (strerror_r);
1011 # endif
1012 #elif defined GNULIB_POSIXCHECK
1013 # undef strerror_r
1014 # if HAVE_RAW_DECL_STRERROR_R
1015 _GL_WARN_ON_USE (strerror_r, "strerror_r is unportable - "
1016                  "use gnulib module strerror_r-posix for portability");
1017 # endif
1018 #endif
1019
1020 #if @GNULIB_STRSIGNAL@
1021 # if @REPLACE_STRSIGNAL@
1022 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1023 #   define strsignal rpl_strsignal
1024 #  endif
1025 _GL_FUNCDECL_RPL (strsignal, char *, (int __sig));
1026 _GL_CXXALIAS_RPL (strsignal, char *, (int __sig));
1027 # else
1028 #  if ! @HAVE_DECL_STRSIGNAL@
1029 _GL_FUNCDECL_SYS (strsignal, char *, (int __sig));
1030 #  endif
1031 /* Need to cast, because on Cygwin 1.5.x systems, the return type is
1032    'const char *'.  */
1033 _GL_CXXALIAS_SYS_CAST (strsignal, char *, (int __sig));
1034 # endif
1035 _GL_CXXALIASWARN (strsignal);
1036 #elif defined GNULIB_POSIXCHECK
1037 # undef strsignal
1038 # if HAVE_RAW_DECL_STRSIGNAL
1039 _GL_WARN_ON_USE (strsignal, "strsignal is unportable - "
1040                  "use gnulib module strsignal for portability");
1041 # endif
1042 #endif
1043
1044 #if @GNULIB_STRVERSCMP@
1045 # if !@HAVE_STRVERSCMP@
1046 _GL_FUNCDECL_SYS (strverscmp, int, (const char *, const char *)
1047                                    _GL_ATTRIBUTE_PURE
1048                                    _GL_ARG_NONNULL ((1, 2)));
1049 # endif
1050 _GL_CXXALIAS_SYS (strverscmp, int, (const char *, const char *));
1051 _GL_CXXALIASWARN (strverscmp);
1052 #elif defined GNULIB_POSIXCHECK
1053 # undef strverscmp
1054 # if HAVE_RAW_DECL_STRVERSCMP
1055 _GL_WARN_ON_USE (strverscmp, "strverscmp is unportable - "
1056                  "use gnulib module strverscmp for portability");
1057 # endif
1058 #endif
1059
1060
1061 #endif /* _@GUARD_PREFIX@_STRING_H */
1062 #endif /* _@GUARD_PREFIX@_STRING_H */
1063 #endif