lib/string.in.h

   1 /* A GNU-like <string.h>.
   2
   3    Copyright (C) 1995-1996, 2001-2016 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 3, 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 <http://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 /* Find the index of the least-significant set bit.  */
  78 #if @GNULIB_FFSL@
  79 # if !@HAVE_FFSL@
  80 _GL_FUNCDECL_SYS (ffsl, int, (long int i));
  81 # endif
  82 _GL_CXXALIAS_SYS (ffsl, int, (long int i));
  83 _GL_CXXALIASWARN (ffsl);
  84 #elif defined GNULIB_POSIXCHECK
  85 # undef ffsl
  86 # if HAVE_RAW_DECL_FFSL
  87 _GL_WARN_ON_USE (ffsl, "ffsl is not portable - use the ffsl module");
  88 # endif
  89 #endif
  90
  91
  92 /* Find the index of the least-significant set bit.  */
  93 #if @GNULIB_FFSLL@
  94 # if !@HAVE_FFSLL@
  95 _GL_FUNCDECL_SYS (ffsll, int, (long long int i));
  96 # endif
  97 _GL_CXXALIAS_SYS (ffsll, int, (long long int i));
  98 _GL_CXXALIASWARN (ffsll);
  99 #elif defined GNULIB_POSIXCHECK
 100 # undef ffsll
 101 # if HAVE_RAW_DECL_FFSLL
 102 _GL_WARN_ON_USE (ffsll, "ffsll is not portable - use the ffsll module");
 103 # endif
 104 #endif
 105
 106
 107 /* Return the first instance of C within N bytes of S, or NULL.  */
 108 #if @GNULIB_MEMCHR@
 109 # if @REPLACE_MEMCHR@
 110 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 111 #   define memchr rpl_memchr
 112 #  endif
 113 _GL_FUNCDECL_RPL (memchr, void *, (void const *__s, int __c, size_t __n)
 114                                   _GL_ATTRIBUTE_PURE
 115                                   _GL_ARG_NONNULL ((1)));
 116 _GL_CXXALIAS_RPL (memchr, void *, (void const *__s, int __c, size_t __n));
 117 # else
 118 #  if ! @HAVE_MEMCHR@
 119 _GL_FUNCDECL_SYS (memchr, void *, (void const *__s, int __c, size_t __n)
 120                                   _GL_ATTRIBUTE_PURE
 121                                   _GL_ARG_NONNULL ((1)));
 122 #  endif
 123   /* On some systems, this function is defined as an overloaded function:
 124        extern "C" { const void * std::memchr (const void *, int, size_t); }
 125        extern "C++" { void * std::memchr (void *, int, size_t); }  */
 126 _GL_CXXALIAS_SYS_CAST2 (memchr,
 127                         void *, (void const *__s, int __c, size_t __n),
 128                         void const *, (void const *__s, int __c, size_t __n));
 129 # endif
 130 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 131      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 132 _GL_CXXALIASWARN1 (memchr, void *, (void *__s, int __c, size_t __n));
 133 _GL_CXXALIASWARN1 (memchr, void const *,
 134                    (void const *__s, int __c, size_t __n));
 135 # else
 136 _GL_CXXALIASWARN (memchr);
 137 # endif
 138 #elif defined GNULIB_POSIXCHECK
 139 # undef memchr
 140 /* Assume memchr is always declared.  */
 141 _GL_WARN_ON_USE (memchr, "memchr has platform-specific bugs - "
 142                  "use gnulib module memchr for portability" );
 143 #endif
 144
 145 /* Return the first occurrence of NEEDLE in HAYSTACK.  */
 146 #if @GNULIB_MEMMEM@
 147 # if @REPLACE_MEMMEM@
 148 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 149 #   define memmem rpl_memmem
 150 #  endif
 151 _GL_FUNCDECL_RPL (memmem, void *,
 152                   (void const *__haystack, size_t __haystack_len,
 153                    void const *__needle, size_t __needle_len)
 154                   _GL_ATTRIBUTE_PURE
 155                   _GL_ARG_NONNULL ((1, 3)));
 156 _GL_CXXALIAS_RPL (memmem, void *,
 157                   (void const *__haystack, size_t __haystack_len,
 158                    void const *__needle, size_t __needle_len));
 159 # else
 160 #  if ! @HAVE_DECL_MEMMEM@
 161 _GL_FUNCDECL_SYS (memmem, void *,
 162                   (void const *__haystack, size_t __haystack_len,
 163                    void const *__needle, size_t __needle_len)
 164                   _GL_ATTRIBUTE_PURE
 165                   _GL_ARG_NONNULL ((1, 3)));
 166 #  endif
 167 _GL_CXXALIAS_SYS (memmem, void *,
 168                   (void const *__haystack, size_t __haystack_len,
 169                    void const *__needle, size_t __needle_len));
 170 # endif
 171 _GL_CXXALIASWARN (memmem);
 172 #elif defined GNULIB_POSIXCHECK
 173 # undef memmem
 174 # if HAVE_RAW_DECL_MEMMEM
 175 _GL_WARN_ON_USE (memmem, "memmem is unportable and often quadratic - "
 176                  "use gnulib module memmem-simple for portability, "
 177                  "and module memmem for speed" );
 178 # endif
 179 #endif
 180
 181 /* Copy N bytes of SRC to DEST, return pointer to bytes after the
 182    last written byte.  */
 183 #if @GNULIB_MEMPCPY@
 184 # if ! @HAVE_MEMPCPY@
 185 _GL_FUNCDECL_SYS (mempcpy, void *,
 186                   (void *restrict __dest, void const *restrict __src,
 187                    size_t __n)
 188                   _GL_ARG_NONNULL ((1, 2)));
 189 # endif
 190 _GL_CXXALIAS_SYS (mempcpy, void *,
 191                   (void *restrict __dest, void const *restrict __src,
 192                    size_t __n));
 193 _GL_CXXALIASWARN (mempcpy);
 194 #elif defined GNULIB_POSIXCHECK
 195 # undef mempcpy
 196 # if HAVE_RAW_DECL_MEMPCPY
 197 _GL_WARN_ON_USE (mempcpy, "mempcpy is unportable - "
 198                  "use gnulib module mempcpy for portability");
 199 # endif
 200 #endif
 201
 202 /* Search backwards through a block for a byte (specified as an int).  */
 203 #if @GNULIB_MEMRCHR@
 204 # if ! @HAVE_DECL_MEMRCHR@
 205 _GL_FUNCDECL_SYS (memrchr, void *, (void const *, int, size_t)
 206                                    _GL_ATTRIBUTE_PURE
 207                                    _GL_ARG_NONNULL ((1)));
 208 # endif
 209   /* On some systems, this function is defined as an overloaded function:
 210        extern "C++" { const void * std::memrchr (const void *, int, size_t); }
 211        extern "C++" { void * std::memrchr (void *, int, size_t); }  */
 212 _GL_CXXALIAS_SYS_CAST2 (memrchr,
 213                         void *, (void const *, int, size_t),
 214                         void const *, (void const *, int, size_t));
 215 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 216      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 217 _GL_CXXALIASWARN1 (memrchr, void *, (void *, int, size_t));
 218 _GL_CXXALIASWARN1 (memrchr, void const *, (void const *, int, size_t));
 219 # else
 220 _GL_CXXALIASWARN (memrchr);
 221 # endif
 222 #elif defined GNULIB_POSIXCHECK
 223 # undef memrchr
 224 # if HAVE_RAW_DECL_MEMRCHR
 225 _GL_WARN_ON_USE (memrchr, "memrchr is unportable - "
 226                  "use gnulib module memrchr for portability");
 227 # endif
 228 #endif
 229
 230 /* Find the first occurrence of C in S.  More efficient than
 231    memchr(S,C,N), at the expense of undefined behavior if C does not
 232    occur within N bytes.  */
 233 #if @GNULIB_RAWMEMCHR@
 234 # if ! @HAVE_RAWMEMCHR@
 235 _GL_FUNCDECL_SYS (rawmemchr, void *, (void const *__s, int __c_in)
 236                                      _GL_ATTRIBUTE_PURE
 237                                      _GL_ARG_NONNULL ((1)));
 238 # endif
 239   /* On some systems, this function is defined as an overloaded function:
 240        extern "C++" { const void * std::rawmemchr (const void *, int); }
 241        extern "C++" { void * std::rawmemchr (void *, int); }  */
 242 _GL_CXXALIAS_SYS_CAST2 (rawmemchr,
 243                         void *, (void const *__s, int __c_in),
 244                         void const *, (void const *__s, int __c_in));
 245 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 246      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 247 _GL_CXXALIASWARN1 (rawmemchr, void *, (void *__s, int __c_in));
 248 _GL_CXXALIASWARN1 (rawmemchr, void const *, (void const *__s, int __c_in));
 249 # else
 250 _GL_CXXALIASWARN (rawmemchr);
 251 # endif
 252 #elif defined GNULIB_POSIXCHECK
 253 # undef rawmemchr
 254 # if HAVE_RAW_DECL_RAWMEMCHR
 255 _GL_WARN_ON_USE (rawmemchr, "rawmemchr is unportable - "
 256                  "use gnulib module rawmemchr for portability");
 257 # endif
 258 #endif
 259
 260 /* Copy SRC to DST, returning the address of the terminating '\0' in DST.  */
 261 #if @GNULIB_STPCPY@
 262 # if ! @HAVE_STPCPY@
 263 _GL_FUNCDECL_SYS (stpcpy, char *,
 264                   (char *restrict __dst, char const *restrict __src)
 265                   _GL_ARG_NONNULL ((1, 2)));
 266 # endif
 267 _GL_CXXALIAS_SYS (stpcpy, char *,
 268                   (char *restrict __dst, char const *restrict __src));
 269 _GL_CXXALIASWARN (stpcpy);
 270 #elif defined GNULIB_POSIXCHECK
 271 # undef stpcpy
 272 # if HAVE_RAW_DECL_STPCPY
 273 _GL_WARN_ON_USE (stpcpy, "stpcpy is unportable - "
 274                  "use gnulib module stpcpy for portability");
 275 # endif
 276 #endif
 277
 278 /* Copy no more than N bytes of SRC to DST, returning a pointer past the
 279    last non-NUL byte written into DST.  */
 280 #if @GNULIB_STPNCPY@
 281 # if @REPLACE_STPNCPY@
 282 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 283 #   undef stpncpy
 284 #   define stpncpy rpl_stpncpy
 285 #  endif
 286 _GL_FUNCDECL_RPL (stpncpy, char *,
 287                   (char *restrict __dst, char const *restrict __src,
 288                    size_t __n)
 289                   _GL_ARG_NONNULL ((1, 2)));
 290 _GL_CXXALIAS_RPL (stpncpy, char *,
 291                   (char *restrict __dst, char const *restrict __src,
 292                    size_t __n));
 293 # else
 294 #  if ! @HAVE_STPNCPY@
 295 _GL_FUNCDECL_SYS (stpncpy, char *,
 296                   (char *restrict __dst, char const *restrict __src,
 297                    size_t __n)
 298                   _GL_ARG_NONNULL ((1, 2)));
 299 #  endif
 300 _GL_CXXALIAS_SYS (stpncpy, char *,
 301                   (char *restrict __dst, char const *restrict __src,
 302                    size_t __n));
 303 # endif
 304 _GL_CXXALIASWARN (stpncpy);
 305 #elif defined GNULIB_POSIXCHECK
 306 # undef stpncpy
 307 # if HAVE_RAW_DECL_STPNCPY
 308 _GL_WARN_ON_USE (stpncpy, "stpncpy is unportable - "
 309                  "use gnulib module stpncpy for portability");
 310 # endif
 311 #endif
 312
 313 #if defined GNULIB_POSIXCHECK
 314 /* strchr() does not work with multibyte strings if the locale encoding is
 315    GB18030 and the character to be searched is a digit.  */
 316 # undef strchr
 317 /* Assume strchr is always declared.  */
 318 _GL_WARN_ON_USE (strchr, "strchr cannot work correctly on character strings "
 319                  "in some multibyte locales - "
 320                  "use mbschr if you care about internationalization");
 321 #endif
 322
 323 /* Find the first occurrence of C in S or the final NUL byte.  */
 324 #if @GNULIB_STRCHRNUL@
 325 # if @REPLACE_STRCHRNUL@
 326 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 327 #   define strchrnul rpl_strchrnul
 328 #  endif
 329 _GL_FUNCDECL_RPL (strchrnul, char *, (const char *__s, int __c_in)
 330                                      _GL_ATTRIBUTE_PURE
 331                                      _GL_ARG_NONNULL ((1)));
 332 _GL_CXXALIAS_RPL (strchrnul, char *,
 333                   (const char *str, int ch));
 334 # else
 335 #  if ! @HAVE_STRCHRNUL@
 336 _GL_FUNCDECL_SYS (strchrnul, char *, (char const *__s, int __c_in)
 337                                      _GL_ATTRIBUTE_PURE
 338                                      _GL_ARG_NONNULL ((1)));
 339 #  endif
 340   /* On some systems, this function is defined as an overloaded function:
 341        extern "C++" { const char * std::strchrnul (const char *, int); }
 342        extern "C++" { char * std::strchrnul (char *, int); }  */
 343 _GL_CXXALIAS_SYS_CAST2 (strchrnul,
 344                         char *, (char const *__s, int __c_in),
 345                         char const *, (char const *__s, int __c_in));
 346 # endif
 347 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 348      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 349 _GL_CXXALIASWARN1 (strchrnul, char *, (char *__s, int __c_in));
 350 _GL_CXXALIASWARN1 (strchrnul, char const *, (char const *__s, int __c_in));
 351 # else
 352 _GL_CXXALIASWARN (strchrnul);
 353 # endif
 354 #elif defined GNULIB_POSIXCHECK
 355 # undef strchrnul
 356 # if HAVE_RAW_DECL_STRCHRNUL
 357 _GL_WARN_ON_USE (strchrnul, "strchrnul is unportable - "
 358                  "use gnulib module strchrnul for portability");
 359 # endif
 360 #endif
 361
 362 /* Duplicate S, returning an identical malloc'd string.  */
 363 #if @GNULIB_STRDUP@
 364 # if @REPLACE_STRDUP@
 365 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 366 #   undef strdup
 367 #   define strdup rpl_strdup
 368 #  endif
 369 _GL_FUNCDECL_RPL (strdup, char *, (char const *__s) _GL_ARG_NONNULL ((1)));
 370 _GL_CXXALIAS_RPL (strdup, char *, (char const *__s));
 371 # else
 372 #  if defined __cplusplus && defined GNULIB_NAMESPACE && defined strdup
 373     /* strdup exists as a function and as a macro.  Get rid of the macro.  */
 374 #   undef strdup
 375 #  endif
 376 #  if !(@HAVE_DECL_STRDUP@ || defined strdup)
 377 _GL_FUNCDECL_SYS (strdup, char *, (char const *__s) _GL_ARG_NONNULL ((1)));
 378 #  endif
 379 _GL_CXXALIAS_SYS (strdup, char *, (char const *__s));
 380 # endif
 381 _GL_CXXALIASWARN (strdup);
 382 #elif defined GNULIB_POSIXCHECK
 383 # undef strdup
 384 # if HAVE_RAW_DECL_STRDUP
 385 _GL_WARN_ON_USE (strdup, "strdup is unportable - "
 386                  "use gnulib module strdup for portability");
 387 # endif
 388 #endif
 389
 390 /* Append no more than N characters from SRC onto DEST.  */
 391 #if @GNULIB_STRNCAT@
 392 # if @REPLACE_STRNCAT@
 393 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 394 #   undef strncat
 395 #   define strncat rpl_strncat
 396 #  endif
 397 _GL_FUNCDECL_RPL (strncat, char *, (char *dest, const char *src, size_t n)
 398                                    _GL_ARG_NONNULL ((1, 2)));
 399 _GL_CXXALIAS_RPL (strncat, char *, (char *dest, const char *src, size_t n));
 400 # else
 401 _GL_CXXALIAS_SYS (strncat, char *, (char *dest, const char *src, size_t n));
 402 # endif
 403 _GL_CXXALIASWARN (strncat);
 404 #elif defined GNULIB_POSIXCHECK
 405 # undef strncat
 406 # if HAVE_RAW_DECL_STRNCAT
 407 _GL_WARN_ON_USE (strncat, "strncat is unportable - "
 408                  "use gnulib module strncat for portability");
 409 # endif
 410 #endif
 411
 412 /* Return a newly allocated copy of at most N bytes of STRING.  */
 413 #if @GNULIB_STRNDUP@
 414 # if @REPLACE_STRNDUP@
 415 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 416 #   undef strndup
 417 #   define strndup rpl_strndup
 418 #  endif
 419 _GL_FUNCDECL_RPL (strndup, char *, (char const *__s, size_t __n)
 420                                    _GL_ARG_NONNULL ((1)));
 421 _GL_CXXALIAS_RPL (strndup, char *, (char const *__s, size_t __n));
 422 # else
 423 #  if ! @HAVE_DECL_STRNDUP@
 424 _GL_FUNCDECL_SYS (strndup, char *, (char const *__s, size_t __n)
 425                                    _GL_ARG_NONNULL ((1)));
 426 #  endif
 427 _GL_CXXALIAS_SYS (strndup, char *, (char const *__s, size_t __n));
 428 # endif
 429 _GL_CXXALIASWARN (strndup);
 430 #elif defined GNULIB_POSIXCHECK
 431 # undef strndup
 432 # if HAVE_RAW_DECL_STRNDUP
 433 _GL_WARN_ON_USE (strndup, "strndup is unportable - "
 434                  "use gnulib module strndup for portability");
 435 # endif
 436 #endif
 437
 438 /* Find the length (number of bytes) of STRING, but scan at most
 439    MAXLEN bytes.  If no '\0' terminator is found in that many bytes,
 440    return MAXLEN.  */
 441 #if @GNULIB_STRNLEN@
 442 # if @REPLACE_STRNLEN@
 443 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 444 #   undef strnlen
 445 #   define strnlen rpl_strnlen
 446 #  endif
 447 _GL_FUNCDECL_RPL (strnlen, size_t, (char const *__s, size_t __maxlen)
 448                                    _GL_ATTRIBUTE_PURE
 449                                    _GL_ARG_NONNULL ((1)));
 450 _GL_CXXALIAS_RPL (strnlen, size_t, (char const *__s, size_t __maxlen));
 451 # else
 452 #  if ! @HAVE_DECL_STRNLEN@
 453 _GL_FUNCDECL_SYS (strnlen, size_t, (char const *__s, size_t __maxlen)
 454                                    _GL_ATTRIBUTE_PURE
 455                                    _GL_ARG_NONNULL ((1)));
 456 #  endif
 457 _GL_CXXALIAS_SYS (strnlen, size_t, (char const *__s, size_t __maxlen));
 458 # endif
 459 _GL_CXXALIASWARN (strnlen);
 460 #elif defined GNULIB_POSIXCHECK
 461 # undef strnlen
 462 # if HAVE_RAW_DECL_STRNLEN
 463 _GL_WARN_ON_USE (strnlen, "strnlen is unportable - "
 464                  "use gnulib module strnlen for portability");
 465 # endif
 466 #endif
 467
 468 #if defined GNULIB_POSIXCHECK
 469 /* strcspn() assumes the second argument is a list of single-byte characters.
 470    Even in this simple case, it does not work with multibyte strings if the
 471    locale encoding is GB18030 and one of the characters to be searched is a
 472    digit.  */
 473 # undef strcspn
 474 /* Assume strcspn is always declared.  */
 475 _GL_WARN_ON_USE (strcspn, "strcspn cannot work correctly on character strings "
 476                  "in multibyte locales - "
 477                  "use mbscspn if you care about internationalization");
 478 #endif
 479
 480 /* Find the first occurrence in S of any character in ACCEPT.  */
 481 #if @GNULIB_STRPBRK@
 482 # if ! @HAVE_STRPBRK@
 483 _GL_FUNCDECL_SYS (strpbrk, char *, (char const *__s, char const *__accept)
 484                                    _GL_ATTRIBUTE_PURE
 485                                    _GL_ARG_NONNULL ((1, 2)));
 486 # endif
 487   /* On some systems, this function is defined as an overloaded function:
 488        extern "C" { const char * strpbrk (const char *, const char *); }
 489        extern "C++" { char * strpbrk (char *, const char *); }  */
 490 _GL_CXXALIAS_SYS_CAST2 (strpbrk,
 491                         char *, (char const *__s, char const *__accept),
 492                         const char *, (char const *__s, char const *__accept));
 493 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 494      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 495 _GL_CXXALIASWARN1 (strpbrk, char *, (char *__s, char const *__accept));
 496 _GL_CXXALIASWARN1 (strpbrk, char const *,
 497                    (char const *__s, char const *__accept));
 498 # else
 499 _GL_CXXALIASWARN (strpbrk);
 500 # endif
 501 # if defined GNULIB_POSIXCHECK
 502 /* strpbrk() assumes the second argument is a list of single-byte characters.
 503    Even in this simple case, it does not work with multibyte strings if the
 504    locale encoding is GB18030 and one of the characters to be searched is a
 505    digit.  */
 506 #  undef strpbrk
 507 _GL_WARN_ON_USE (strpbrk, "strpbrk cannot work correctly on character strings "
 508                  "in multibyte locales - "
 509                  "use mbspbrk if you care about internationalization");
 510 # endif
 511 #elif defined GNULIB_POSIXCHECK
 512 # undef strpbrk
 513 # if HAVE_RAW_DECL_STRPBRK
 514 _GL_WARN_ON_USE (strpbrk, "strpbrk is unportable - "
 515                  "use gnulib module strpbrk for portability");
 516 # endif
 517 #endif
 518
 519 #if defined GNULIB_POSIXCHECK
 520 /* strspn() assumes the second argument is a list of single-byte characters.
 521    Even in this simple case, it cannot work with multibyte strings.  */
 522 # undef strspn
 523 /* Assume strspn is always declared.  */
 524 _GL_WARN_ON_USE (strspn, "strspn cannot work correctly on character strings "
 525                  "in multibyte locales - "
 526                  "use mbsspn if you care about internationalization");
 527 #endif
 528
 529 #if defined GNULIB_POSIXCHECK
 530 /* strrchr() does not work with multibyte strings if the locale encoding is
 531    GB18030 and the character to be searched is a digit.  */
 532 # undef strrchr
 533 /* Assume strrchr is always declared.  */
 534 _GL_WARN_ON_USE (strrchr, "strrchr cannot work correctly on character strings "
 535                  "in some multibyte locales - "
 536                  "use mbsrchr if you care about internationalization");
 537 #endif
 538
 539 /* Search the next delimiter (char listed in DELIM) starting at *STRINGP.
 540    If one is found, overwrite it with a NUL, and advance *STRINGP
 541    to point to the next char after it.  Otherwise, set *STRINGP to NULL.
 542    If *STRINGP was already NULL, nothing happens.
 543    Return the old value of *STRINGP.
 544
 545    This is a variant of strtok() that is multithread-safe and supports
 546    empty fields.
 547
 548    Caveat: It modifies the original string.
 549    Caveat: These functions cannot be used on constant strings.
 550    Caveat: The identity of the delimiting character is lost.
 551    Caveat: It doesn't work with multibyte strings unless all of the delimiter
 552            characters are ASCII characters < 0x30.
 553
 554    See also strtok_r().  */
 555 #if @GNULIB_STRSEP@
 556 # if ! @HAVE_STRSEP@
 557 _GL_FUNCDECL_SYS (strsep, char *,
 558                   (char **restrict __stringp, char const *restrict __delim)
 559                   _GL_ARG_NONNULL ((1, 2)));
 560 # endif
 561 _GL_CXXALIAS_SYS (strsep, char *,
 562                   (char **restrict __stringp, char const *restrict __delim));
 563 _GL_CXXALIASWARN (strsep);
 564 # if defined GNULIB_POSIXCHECK
 565 #  undef strsep
 566 _GL_WARN_ON_USE (strsep, "strsep cannot work correctly on character strings "
 567                  "in multibyte locales - "
 568                  "use mbssep if you care about internationalization");
 569 # endif
 570 #elif defined GNULIB_POSIXCHECK
 571 # undef strsep
 572 # if HAVE_RAW_DECL_STRSEP
 573 _GL_WARN_ON_USE (strsep, "strsep is unportable - "
 574                  "use gnulib module strsep for portability");
 575 # endif
 576 #endif
 577
 578 #if @GNULIB_STRSTR@
 579 # if @REPLACE_STRSTR@
 580 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 581 #   define strstr rpl_strstr
 582 #  endif
 583 _GL_FUNCDECL_RPL (strstr, char *, (const char *haystack, const char *needle)
 584                                   _GL_ATTRIBUTE_PURE
 585                                   _GL_ARG_NONNULL ((1, 2)));
 586 _GL_CXXALIAS_RPL (strstr, char *, (const char *haystack, const char *needle));
 587 # else
 588   /* On some systems, this function is defined as an overloaded function:
 589        extern "C++" { const char * strstr (const char *, const char *); }
 590        extern "C++" { char * strstr (char *, const char *); }  */
 591 _GL_CXXALIAS_SYS_CAST2 (strstr,
 592                         char *, (const char *haystack, const char *needle),
 593                         const char *, (const char *haystack, const char *needle));
 594 # endif
 595 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 596      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 597 _GL_CXXALIASWARN1 (strstr, char *, (char *haystack, const char *needle));
 598 _GL_CXXALIASWARN1 (strstr, const char *,
 599                    (const char *haystack, const char *needle));
 600 # else
 601 _GL_CXXALIASWARN (strstr);
 602 # endif
 603 #elif defined GNULIB_POSIXCHECK
 604 /* strstr() does not work with multibyte strings if the locale encoding is
 605    different from UTF-8:
 606    POSIX says that it operates on "strings", and "string" in POSIX is defined
 607    as a sequence of bytes, not of characters.  */
 608 # undef strstr
 609 /* Assume strstr is always declared.  */
 610 _GL_WARN_ON_USE (strstr, "strstr is quadratic on many systems, and cannot "
 611                  "work correctly on character strings in most "
 612                  "multibyte locales - "
 613                  "use mbsstr if you care about internationalization, "
 614                  "or use strstr if you care about speed");
 615 #endif
 616
 617 /* Find the first occurrence of NEEDLE in HAYSTACK, using case-insensitive
 618    comparison.  */
 619 #if @GNULIB_STRCASESTR@
 620 # if @REPLACE_STRCASESTR@
 621 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 622 #   define strcasestr rpl_strcasestr
 623 #  endif
 624 _GL_FUNCDECL_RPL (strcasestr, char *,
 625                   (const char *haystack, const char *needle)
 626                   _GL_ATTRIBUTE_PURE
 627                   _GL_ARG_NONNULL ((1, 2)));
 628 _GL_CXXALIAS_RPL (strcasestr, char *,
 629                   (const char *haystack, const char *needle));
 630 # else
 631 #  if ! @HAVE_STRCASESTR@
 632 _GL_FUNCDECL_SYS (strcasestr, char *,
 633                   (const char *haystack, const char *needle)
 634                   _GL_ATTRIBUTE_PURE
 635                   _GL_ARG_NONNULL ((1, 2)));
 636 #  endif
 637   /* On some systems, this function is defined as an overloaded function:
 638        extern "C++" { const char * strcasestr (const char *, const char *); }
 639        extern "C++" { char * strcasestr (char *, const char *); }  */
 640 _GL_CXXALIAS_SYS_CAST2 (strcasestr,
 641                         char *, (const char *haystack, const char *needle),
 642                         const char *, (const char *haystack, const char *needle));
 643 # endif
 644 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 645      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 646 _GL_CXXALIASWARN1 (strcasestr, char *, (char *haystack, const char *needle));
 647 _GL_CXXALIASWARN1 (strcasestr, const char *,
 648                    (const char *haystack, const char *needle));
 649 # else
 650 _GL_CXXALIASWARN (strcasestr);
 651 # endif
 652 #elif defined GNULIB_POSIXCHECK
 653 /* strcasestr() does not work with multibyte strings:
 654    It is a glibc extension, and glibc implements it only for unibyte
 655    locales.  */
 656 # undef strcasestr
 657 # if HAVE_RAW_DECL_STRCASESTR
 658 _GL_WARN_ON_USE (strcasestr, "strcasestr does work correctly on character "
 659                  "strings in multibyte locales - "
 660                  "use mbscasestr if you care about "
 661                  "internationalization, or use c-strcasestr if you want "
 662                  "a locale independent function");
 663 # endif
 664 #endif
 665
 666 /* Parse S into tokens separated by characters in DELIM.
 667    If S is NULL, the saved pointer in SAVE_PTR is used as
 668    the next starting point.  For example:
 669         char s[] = "-abc-=-def";
 670         char *sp;
 671         x = strtok_r(s, "-", &sp);      // x = "abc", sp = "=-def"
 672         x = strtok_r(NULL, "-=", &sp);  // x = "def", sp = NULL
 673         x = strtok_r(NULL, "=", &sp);   // x = NULL
 674                 // s = "abc\0-def\0"
 675
 676    This is a variant of strtok() that is multithread-safe.
 677
 678    For the POSIX documentation for this function, see:
 679    http://www.opengroup.org/susv3xsh/strtok.html
 680
 681    Caveat: It modifies the original string.
 682    Caveat: These functions cannot be used on constant strings.
 683    Caveat: The identity of the delimiting character is lost.
 684    Caveat: It doesn't work with multibyte strings unless all of the delimiter
 685            characters are ASCII characters < 0x30.
 686
 687    See also strsep().  */
 688 #if @GNULIB_STRTOK_R@
 689 # if @REPLACE_STRTOK_R@
 690 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 691 #   undef strtok_r
 692 #   define strtok_r rpl_strtok_r
 693 #  endif
 694 _GL_FUNCDECL_RPL (strtok_r, char *,
 695                   (char *restrict s, char const *restrict delim,
 696                    char **restrict save_ptr)
 697                   _GL_ARG_NONNULL ((2, 3)));
 698 _GL_CXXALIAS_RPL (strtok_r, char *,
 699                   (char *restrict s, char const *restrict delim,
 700                    char **restrict save_ptr));
 701 # else
 702 #  if @UNDEFINE_STRTOK_R@ || defined GNULIB_POSIXCHECK
 703 #   undef strtok_r
 704 #  endif
 705 #  if ! @HAVE_DECL_STRTOK_R@
 706 _GL_FUNCDECL_SYS (strtok_r, char *,
 707                   (char *restrict s, char const *restrict delim,
 708                    char **restrict save_ptr)
 709                   _GL_ARG_NONNULL ((2, 3)));
 710 #  endif
 711 _GL_CXXALIAS_SYS (strtok_r, char *,
 712                   (char *restrict s, char const *restrict delim,
 713                    char **restrict save_ptr));
 714 # endif
 715 _GL_CXXALIASWARN (strtok_r);
 716 # if defined GNULIB_POSIXCHECK
 717 _GL_WARN_ON_USE (strtok_r, "strtok_r cannot work correctly on character "
 718                  "strings in multibyte locales - "
 719                  "use mbstok_r if you care about internationalization");
 720 # endif
 721 #elif defined GNULIB_POSIXCHECK
 722 # undef strtok_r
 723 # if HAVE_RAW_DECL_STRTOK_R
 724 _GL_WARN_ON_USE (strtok_r, "strtok_r is unportable - "
 725                  "use gnulib module strtok_r for portability");
 726 # endif
 727 #endif
 728
 729
 730 /* The following functions are not specified by POSIX.  They are gnulib
 731    extensions.  */
 732
 733 #if @GNULIB_MBSLEN@
 734 /* Return the number of multibyte characters in the character string STRING.
 735    This considers multibyte characters, unlike strlen, which counts bytes.  */
 736 # ifdef __MirBSD__  /* MirBSD defines mbslen as a macro.  Override it.  */
 737 #  undef mbslen
 738 # endif
 739 # if @HAVE_MBSLEN@  /* AIX, OSF/1, MirBSD define mbslen already in libc.  */
 740 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 741 #   define mbslen rpl_mbslen
 742 #  endif
 743 _GL_FUNCDECL_RPL (mbslen, size_t, (const char *string)
 744                                   _GL_ATTRIBUTE_PURE
 745                                   _GL_ARG_NONNULL ((1)));
 746 _GL_CXXALIAS_RPL (mbslen, size_t, (const char *string));
 747 # else
 748 _GL_FUNCDECL_SYS (mbslen, size_t, (const char *string)
 749                                   _GL_ATTRIBUTE_PURE
 750                                   _GL_ARG_NONNULL ((1)));
 751 _GL_CXXALIAS_SYS (mbslen, size_t, (const char *string));
 752 # endif
 753 _GL_CXXALIASWARN (mbslen);
 754 #endif
 755
 756 #if @GNULIB_MBSNLEN@
 757 /* Return the number of multibyte characters in the character string starting
 758    at STRING and ending at STRING + LEN.  */
 759 _GL_EXTERN_C size_t mbsnlen (const char *string, size_t len)
 760      _GL_ATTRIBUTE_PURE
 761      _GL_ARG_NONNULL ((1));
 762 #endif
 763
 764 #if @GNULIB_MBSCHR@
 765 /* Locate the first single-byte character C in the character string STRING,
 766    and return a pointer to it.  Return NULL if C is not found in STRING.
 767    Unlike strchr(), this function works correctly in multibyte locales with
 768    encodings such as GB18030.  */
 769 # if defined __hpux
 770 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 771 #   define mbschr rpl_mbschr /* avoid collision with HP-UX function */
 772 #  endif
 773 _GL_FUNCDECL_RPL (mbschr, char *, (const char *string, int c)
 774                                   _GL_ATTRIBUTE_PURE
 775                                   _GL_ARG_NONNULL ((1)));
 776 _GL_CXXALIAS_RPL (mbschr, char *, (const char *string, int c));
 777 # else
 778 _GL_FUNCDECL_SYS (mbschr, char *, (const char *string, int c)
 779                                   _GL_ATTRIBUTE_PURE
 780                                   _GL_ARG_NONNULL ((1)));
 781 _GL_CXXALIAS_SYS (mbschr, char *, (const char *string, int c));
 782 # endif
 783 _GL_CXXALIASWARN (mbschr);
 784 #endif
 785
 786 #if @GNULIB_MBSRCHR@
 787 /* Locate the last single-byte character C in the character string STRING,
 788    and return a pointer to it.  Return NULL if C is not found in STRING.
 789    Unlike strrchr(), this function works correctly in multibyte locales with
 790    encodings such as GB18030.  */
 791 # if defined __hpux || defined __INTERIX
 792 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 793 #   define mbsrchr rpl_mbsrchr /* avoid collision with system function */
 794 #  endif
 795 _GL_FUNCDECL_RPL (mbsrchr, char *, (const char *string, int c)
 796                                    _GL_ATTRIBUTE_PURE
 797                                    _GL_ARG_NONNULL ((1)));
 798 _GL_CXXALIAS_RPL (mbsrchr, char *, (const char *string, int c));
 799 # else
 800 _GL_FUNCDECL_SYS (mbsrchr, char *, (const char *string, int c)
 801                                    _GL_ATTRIBUTE_PURE
 802                                    _GL_ARG_NONNULL ((1)));
 803 _GL_CXXALIAS_SYS (mbsrchr, char *, (const char *string, int c));
 804 # endif
 805 _GL_CXXALIASWARN (mbsrchr);
 806 #endif
 807
 808 #if @GNULIB_MBSSTR@
 809 /* Find the first occurrence of the character string NEEDLE in the character
 810    string HAYSTACK.  Return NULL if NEEDLE is not found in HAYSTACK.
 811    Unlike strstr(), this function works correctly in multibyte locales with
 812    encodings different from UTF-8.  */
 813 _GL_EXTERN_C char * mbsstr (const char *haystack, const char *needle)
 814      _GL_ATTRIBUTE_PURE
 815      _GL_ARG_NONNULL ((1, 2));
 816 #endif
 817
 818 #if @GNULIB_MBSCASECMP@
 819 /* Compare the character strings S1 and S2, ignoring case, returning less than,
 820    equal to or greater than zero if S1 is lexicographically less than, equal to
 821    or greater than S2.
 822    Note: This function may, in multibyte locales, return 0 for strings of
 823    different lengths!
 824    Unlike strcasecmp(), this function works correctly in multibyte locales.  */
 825 _GL_EXTERN_C int mbscasecmp (const char *s1, const char *s2)
 826      _GL_ATTRIBUTE_PURE
 827      _GL_ARG_NONNULL ((1, 2));
 828 #endif
 829
 830 #if @GNULIB_MBSNCASECMP@
 831 /* Compare the initial segment of the character string S1 consisting of at most
 832    N characters with the initial segment of the character string S2 consisting
 833    of at most N characters, ignoring case, returning less than, equal to or
 834    greater than zero if the initial segment of S1 is lexicographically less
 835    than, equal to or greater than the initial segment of S2.
 836    Note: This function may, in multibyte locales, return 0 for initial segments
 837    of different lengths!
 838    Unlike strncasecmp(), this function works correctly in multibyte locales.
 839    But beware that N is not a byte count but a character count!  */
 840 _GL_EXTERN_C int mbsncasecmp (const char *s1, const char *s2, size_t n)
 841      _GL_ATTRIBUTE_PURE
 842      _GL_ARG_NONNULL ((1, 2));
 843 #endif
 844
 845 #if @GNULIB_MBSPCASECMP@
 846 /* Compare the initial segment of the character string STRING consisting of
 847    at most mbslen (PREFIX) characters with the character string PREFIX,
 848    ignoring case.  If the two match, return a pointer to the first byte
 849    after this prefix in STRING.  Otherwise, return NULL.
 850    Note: This function may, in multibyte locales, return non-NULL if STRING
 851    is of smaller length than PREFIX!
 852    Unlike strncasecmp(), this function works correctly in multibyte
 853    locales.  */
 854 _GL_EXTERN_C char * mbspcasecmp (const char *string, const char *prefix)
 855      _GL_ATTRIBUTE_PURE
 856      _GL_ARG_NONNULL ((1, 2));
 857 #endif
 858
 859 #if @GNULIB_MBSCASESTR@
 860 /* Find the first occurrence of the character string NEEDLE in the character
 861    string HAYSTACK, using case-insensitive comparison.
 862    Note: This function may, in multibyte locales, return success even if
 863    strlen (haystack) < strlen (needle) !
 864    Unlike strcasestr(), this function works correctly in multibyte locales.  */
 865 _GL_EXTERN_C char * mbscasestr (const char *haystack, const char *needle)
 866      _GL_ATTRIBUTE_PURE
 867      _GL_ARG_NONNULL ((1, 2));
 868 #endif
 869
 870 #if @GNULIB_MBSCSPN@
 871 /* Find the first occurrence in the character string STRING of any character
 872    in the character string ACCEPT.  Return the number of bytes from the
 873    beginning of the string to this occurrence, or to the end of the string
 874    if none exists.
 875    Unlike strcspn(), this function works correctly in multibyte locales.  */
 876 _GL_EXTERN_C size_t mbscspn (const char *string, const char *accept)
 877      _GL_ATTRIBUTE_PURE
 878      _GL_ARG_NONNULL ((1, 2));
 879 #endif
 880
 881 #if @GNULIB_MBSPBRK@
 882 /* Find the first occurrence in the character string STRING of any character
 883    in the character string ACCEPT.  Return the pointer to it, or NULL if none
 884    exists.
 885    Unlike strpbrk(), this function works correctly in multibyte locales.  */
 886 # if defined __hpux
 887 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 888 #   define mbspbrk rpl_mbspbrk /* avoid collision with HP-UX function */
 889 #  endif
 890 _GL_FUNCDECL_RPL (mbspbrk, char *, (const char *string, const char *accept)
 891                                    _GL_ATTRIBUTE_PURE
 892                                    _GL_ARG_NONNULL ((1, 2)));
 893 _GL_CXXALIAS_RPL (mbspbrk, char *, (const char *string, const char *accept));
 894 # else
 895 _GL_FUNCDECL_SYS (mbspbrk, char *, (const char *string, const char *accept)
 896                                    _GL_ATTRIBUTE_PURE
 897                                    _GL_ARG_NONNULL ((1, 2)));
 898 _GL_CXXALIAS_SYS (mbspbrk, char *, (const char *string, const char *accept));
 899 # endif
 900 _GL_CXXALIASWARN (mbspbrk);
 901 #endif
 902
 903 #if @GNULIB_MBSSPN@
 904 /* Find the first occurrence in the character string STRING of any character
 905    not in the character string REJECT.  Return the number of bytes from the
 906    beginning of the string to this occurrence, or to the end of the string
 907    if none exists.
 908    Unlike strspn(), this function works correctly in multibyte locales.  */
 909 _GL_EXTERN_C size_t mbsspn (const char *string, const char *reject)
 910      _GL_ATTRIBUTE_PURE
 911      _GL_ARG_NONNULL ((1, 2));
 912 #endif
 913
 914 #if @GNULIB_MBSSEP@
 915 /* Search the next delimiter (multibyte character listed in the character
 916    string DELIM) starting at the character string *STRINGP.
 917    If one is found, overwrite it with a NUL, and advance *STRINGP to point
 918    to the next multibyte character after it.  Otherwise, set *STRINGP to NULL.
 919    If *STRINGP was already NULL, nothing happens.
 920    Return the old value of *STRINGP.
 921
 922    This is a variant of mbstok_r() that supports empty fields.
 923
 924    Caveat: It modifies the original string.
 925    Caveat: These functions cannot be used on constant strings.
 926    Caveat: The identity of the delimiting character is lost.
 927
 928    See also mbstok_r().  */
 929 _GL_EXTERN_C char * mbssep (char **stringp, const char *delim)
 930      _GL_ARG_NONNULL ((1, 2));
 931 #endif
 932
 933 #if @GNULIB_MBSTOK_R@
 934 /* Parse the character string STRING into tokens separated by characters in
 935    the character string DELIM.
 936    If STRING is NULL, the saved pointer in SAVE_PTR is used as
 937    the next starting point.  For example:
 938         char s[] = "-abc-=-def";
 939         char *sp;
 940         x = mbstok_r(s, "-", &sp);      // x = "abc", sp = "=-def"
 941         x = mbstok_r(NULL, "-=", &sp);  // x = "def", sp = NULL
 942         x = mbstok_r(NULL, "=", &sp);   // x = NULL
 943                 // s = "abc\0-def\0"
 944
 945    Caveat: It modifies the original string.
 946    Caveat: These functions cannot be used on constant strings.
 947    Caveat: The identity of the delimiting character is lost.
 948
 949    See also mbssep().  */
 950 _GL_EXTERN_C char * mbstok_r (char *string, const char *delim, char **save_ptr)
 951      _GL_ARG_NONNULL ((2, 3));
 952 #endif
 953
 954 /* Map any int, typically from errno, into an error message.  */
 955 #if @GNULIB_STRERROR@
 956 # if @REPLACE_STRERROR@
 957 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 958 #   undef strerror
 959 #   define strerror rpl_strerror
 960 #  endif
 961 _GL_FUNCDECL_RPL (strerror, char *, (int));
 962 _GL_CXXALIAS_RPL (strerror, char *, (int));
 963 # else
 964 _GL_CXXALIAS_SYS (strerror, char *, (int));
 965 # endif
 966 _GL_CXXALIASWARN (strerror);
 967 #elif defined GNULIB_POSIXCHECK
 968 # undef strerror
 969 /* Assume strerror is always declared.  */
 970 _GL_WARN_ON_USE (strerror, "strerror is unportable - "
 971                  "use gnulib module strerror to guarantee non-NULL result");
 972 #endif
 973
 974 /* Map any int, typically from errno, into an error message.  Multithread-safe.
 975    Uses the POSIX declaration, not the glibc declaration.  */
 976 #if @GNULIB_STRERROR_R@
 977 # if @REPLACE_STRERROR_R@
 978 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 979 #   undef strerror_r
 980 #   define strerror_r rpl_strerror_r
 981 #  endif
 982 _GL_FUNCDECL_RPL (strerror_r, int, (int errnum, char *buf, size_t buflen)
 983                                    _GL_ARG_NONNULL ((2)));
 984 _GL_CXXALIAS_RPL (strerror_r, int, (int errnum, char *buf, size_t buflen));
 985 # else
 986 #  if !@HAVE_DECL_STRERROR_R@
 987 _GL_FUNCDECL_SYS (strerror_r, int, (int errnum, char *buf, size_t buflen)
 988                                    _GL_ARG_NONNULL ((2)));
 989 #  endif
 990 _GL_CXXALIAS_SYS (strerror_r, int, (int errnum, char *buf, size_t buflen));
 991 # endif
 992 # if @HAVE_DECL_STRERROR_R@
 993 _GL_CXXALIASWARN (strerror_r);
 994 # endif
 995 #elif defined GNULIB_POSIXCHECK
 996 # undef strerror_r
 997 # if HAVE_RAW_DECL_STRERROR_R
 998 _GL_WARN_ON_USE (strerror_r, "strerror_r is unportable - "
 999                  "use gnulib module strerror_r-posix for portability");
1000 # endif
1001 #endif
1002
1003 #if @GNULIB_STRSIGNAL@
1004 # if @REPLACE_STRSIGNAL@
1005 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1006 #   define strsignal rpl_strsignal
1007 #  endif
1008 _GL_FUNCDECL_RPL (strsignal, char *, (int __sig));
1009 _GL_CXXALIAS_RPL (strsignal, char *, (int __sig));
1010 # else
1011 #  if ! @HAVE_DECL_STRSIGNAL@
1012 _GL_FUNCDECL_SYS (strsignal, char *, (int __sig));
1013 #  endif
1014 /* Need to cast, because on Cygwin 1.5.x systems, the return type is
1015    'const char *'.  */
1016 _GL_CXXALIAS_SYS_CAST (strsignal, char *, (int __sig));
1017 # endif
1018 _GL_CXXALIASWARN (strsignal);
1019 #elif defined GNULIB_POSIXCHECK
1020 # undef strsignal
1021 # if HAVE_RAW_DECL_STRSIGNAL
1022 _GL_WARN_ON_USE (strsignal, "strsignal is unportable - "
1023                  "use gnulib module strsignal for portability");
1024 # endif
1025 #endif
1026
1027 #if @GNULIB_STRVERSCMP@
1028 # if !@HAVE_STRVERSCMP@
1029 _GL_FUNCDECL_SYS (strverscmp, int, (const char *, const char *)
1030                                    _GL_ATTRIBUTE_PURE
1031                                    _GL_ARG_NONNULL ((1, 2)));
1032 # endif
1033 _GL_CXXALIAS_SYS (strverscmp, int, (const char *, const char *));
1034 _GL_CXXALIASWARN (strverscmp);
1035 #elif defined GNULIB_POSIXCHECK
1036 # undef strverscmp
1037 # if HAVE_RAW_DECL_STRVERSCMP
1038 _GL_WARN_ON_USE (strverscmp, "strverscmp is unportable - "
1039                  "use gnulib module strverscmp for portability");
1040 # endif
1041 #endif
1042
1043
1044 #endif /* _@GUARD_PREFIX@_STRING_H */
1045 #endif /* _@GUARD_PREFIX@_STRING_H */
1046 #endif