gnulib/import/string.in.h

   1 /* A GNU-like <string.h>.
   2
   3    Copyright (C) 1995-1996, 2001-2019 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 <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 # elif __GLIBC__ >= 2
 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 # if __GLIBC__ >= 2
 421 _GL_CXXALIASWARN (strncat);
 422 # endif
 423 #elif defined GNULIB_POSIXCHECK
 424 # undef strncat
 425 # if HAVE_RAW_DECL_STRNCAT
 426 _GL_WARN_ON_USE (strncat, "strncat is unportable - "
 427                  "use gnulib module strncat for portability");
 428 # endif
 429 #endif
 430
 431 /* Return a newly allocated copy of at most N bytes of STRING.  */
 432 #if @GNULIB_STRNDUP@
 433 # if @REPLACE_STRNDUP@
 434 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 435 #   undef strndup
 436 #   define strndup rpl_strndup
 437 #  endif
 438 _GL_FUNCDECL_RPL (strndup, char *, (char const *__s, size_t __n)
 439                                    _GL_ARG_NONNULL ((1)));
 440 _GL_CXXALIAS_RPL (strndup, char *, (char const *__s, size_t __n));
 441 # else
 442 #  if ! @HAVE_DECL_STRNDUP@
 443 _GL_FUNCDECL_SYS (strndup, char *, (char const *__s, size_t __n)
 444                                    _GL_ARG_NONNULL ((1)));
 445 #  endif
 446 _GL_CXXALIAS_SYS (strndup, char *, (char const *__s, size_t __n));
 447 # endif
 448 _GL_CXXALIASWARN (strndup);
 449 #elif defined GNULIB_POSIXCHECK
 450 # undef strndup
 451 # if HAVE_RAW_DECL_STRNDUP
 452 _GL_WARN_ON_USE (strndup, "strndup is unportable - "
 453                  "use gnulib module strndup for portability");
 454 # endif
 455 #endif
 456
 457 /* Find the length (number of bytes) of STRING, but scan at most
 458    MAXLEN bytes.  If no '\0' terminator is found in that many bytes,
 459    return MAXLEN.  */
 460 #if @GNULIB_STRNLEN@
 461 # if @REPLACE_STRNLEN@
 462 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 463 #   undef strnlen
 464 #   define strnlen rpl_strnlen
 465 #  endif
 466 _GL_FUNCDECL_RPL (strnlen, size_t, (char const *__s, size_t __maxlen)
 467                                    _GL_ATTRIBUTE_PURE
 468                                    _GL_ARG_NONNULL ((1)));
 469 _GL_CXXALIAS_RPL (strnlen, size_t, (char const *__s, size_t __maxlen));
 470 # else
 471 #  if ! @HAVE_DECL_STRNLEN@
 472 _GL_FUNCDECL_SYS (strnlen, size_t, (char const *__s, size_t __maxlen)
 473                                    _GL_ATTRIBUTE_PURE
 474                                    _GL_ARG_NONNULL ((1)));
 475 #  endif
 476 _GL_CXXALIAS_SYS (strnlen, size_t, (char const *__s, size_t __maxlen));
 477 # endif
 478 _GL_CXXALIASWARN (strnlen);
 479 #elif defined GNULIB_POSIXCHECK
 480 # undef strnlen
 481 # if HAVE_RAW_DECL_STRNLEN
 482 _GL_WARN_ON_USE (strnlen, "strnlen is unportable - "
 483                  "use gnulib module strnlen for portability");
 484 # endif
 485 #endif
 486
 487 #if defined GNULIB_POSIXCHECK
 488 /* strcspn() assumes the second argument is a list of single-byte characters.
 489    Even in this simple case, it does not work with multibyte strings if the
 490    locale encoding is GB18030 and one of the characters to be searched is a
 491    digit.  */
 492 # undef strcspn
 493 /* Assume strcspn is always declared.  */
 494 _GL_WARN_ON_USE (strcspn, "strcspn cannot work correctly on character strings "
 495                  "in multibyte locales - "
 496                  "use mbscspn if you care about internationalization");
 497 #endif
 498
 499 /* Find the first occurrence in S of any character in ACCEPT.  */
 500 #if @GNULIB_STRPBRK@
 501 # if ! @HAVE_STRPBRK@
 502 _GL_FUNCDECL_SYS (strpbrk, char *, (char const *__s, char const *__accept)
 503                                    _GL_ATTRIBUTE_PURE
 504                                    _GL_ARG_NONNULL ((1, 2)));
 505 # endif
 506   /* On some systems, this function is defined as an overloaded function:
 507        extern "C" { const char * strpbrk (const char *, const char *); }
 508        extern "C++" { char * strpbrk (char *, const char *); }  */
 509 _GL_CXXALIAS_SYS_CAST2 (strpbrk,
 510                         char *, (char const *__s, char const *__accept),
 511                         const char *, (char const *__s, char const *__accept));
 512 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 513      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 514 _GL_CXXALIASWARN1 (strpbrk, char *, (char *__s, char const *__accept));
 515 _GL_CXXALIASWARN1 (strpbrk, char const *,
 516                    (char const *__s, char const *__accept));
 517 # elif __GLIBC__ >= 2
 518 _GL_CXXALIASWARN (strpbrk);
 519 # endif
 520 # if defined GNULIB_POSIXCHECK
 521 /* strpbrk() assumes the second argument is a list of single-byte characters.
 522    Even in this simple case, it does not work with multibyte strings if the
 523    locale encoding is GB18030 and one of the characters to be searched is a
 524    digit.  */
 525 #  undef strpbrk
 526 _GL_WARN_ON_USE (strpbrk, "strpbrk cannot work correctly on character strings "
 527                  "in multibyte locales - "
 528                  "use mbspbrk if you care about internationalization");
 529 # endif
 530 #elif defined GNULIB_POSIXCHECK
 531 # undef strpbrk
 532 # if HAVE_RAW_DECL_STRPBRK
 533 _GL_WARN_ON_USE (strpbrk, "strpbrk is unportable - "
 534                  "use gnulib module strpbrk for portability");
 535 # endif
 536 #endif
 537
 538 #if defined GNULIB_POSIXCHECK
 539 /* strspn() assumes the second argument is a list of single-byte characters.
 540    Even in this simple case, it cannot work with multibyte strings.  */
 541 # undef strspn
 542 /* Assume strspn is always declared.  */
 543 _GL_WARN_ON_USE (strspn, "strspn cannot work correctly on character strings "
 544                  "in multibyte locales - "
 545                  "use mbsspn if you care about internationalization");
 546 #endif
 547
 548 #if defined GNULIB_POSIXCHECK
 549 /* strrchr() does not work with multibyte strings if the locale encoding is
 550    GB18030 and the character to be searched is a digit.  */
 551 # undef strrchr
 552 /* Assume strrchr is always declared.  */
 553 _GL_WARN_ON_USE (strrchr, "strrchr cannot work correctly on character strings "
 554                  "in some multibyte locales - "
 555                  "use mbsrchr if you care about internationalization");
 556 #endif
 557
 558 /* Search the next delimiter (char listed in DELIM) starting at *STRINGP.
 559    If one is found, overwrite it with a NUL, and advance *STRINGP
 560    to point to the next char after it.  Otherwise, set *STRINGP to NULL.
 561    If *STRINGP was already NULL, nothing happens.
 562    Return the old value of *STRINGP.
 563
 564    This is a variant of strtok() that is multithread-safe and supports
 565    empty fields.
 566
 567    Caveat: It modifies the original string.
 568    Caveat: These functions cannot be used on constant strings.
 569    Caveat: The identity of the delimiting character is lost.
 570    Caveat: It doesn't work with multibyte strings unless all of the delimiter
 571            characters are ASCII characters < 0x30.
 572
 573    See also strtok_r().  */
 574 #if @GNULIB_STRSEP@
 575 # if ! @HAVE_STRSEP@
 576 _GL_FUNCDECL_SYS (strsep, char *,
 577                   (char **restrict __stringp, char const *restrict __delim)
 578                   _GL_ARG_NONNULL ((1, 2)));
 579 # endif
 580 _GL_CXXALIAS_SYS (strsep, char *,
 581                   (char **restrict __stringp, char const *restrict __delim));
 582 _GL_CXXALIASWARN (strsep);
 583 # if defined GNULIB_POSIXCHECK
 584 #  undef strsep
 585 _GL_WARN_ON_USE (strsep, "strsep cannot work correctly on character strings "
 586                  "in multibyte locales - "
 587                  "use mbssep if you care about internationalization");
 588 # endif
 589 #elif defined GNULIB_POSIXCHECK
 590 # undef strsep
 591 # if HAVE_RAW_DECL_STRSEP
 592 _GL_WARN_ON_USE (strsep, "strsep is unportable - "
 593                  "use gnulib module strsep for portability");
 594 # endif
 595 #endif
 596
 597 #if @GNULIB_STRSTR@
 598 # if @REPLACE_STRSTR@
 599 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 600 #   define strstr rpl_strstr
 601 #  endif
 602 _GL_FUNCDECL_RPL (strstr, char *, (const char *haystack, const char *needle)
 603                                   _GL_ATTRIBUTE_PURE
 604                                   _GL_ARG_NONNULL ((1, 2)));
 605 _GL_CXXALIAS_RPL (strstr, char *, (const char *haystack, const char *needle));
 606 # else
 607   /* On some systems, this function is defined as an overloaded function:
 608        extern "C++" { const char * strstr (const char *, const char *); }
 609        extern "C++" { char * strstr (char *, const char *); }  */
 610 _GL_CXXALIAS_SYS_CAST2 (strstr,
 611                         char *, (const char *haystack, const char *needle),
 612                         const char *, (const char *haystack, const char *needle));
 613 # endif
 614 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 615      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 616 _GL_CXXALIASWARN1 (strstr, char *, (char *haystack, const char *needle));
 617 _GL_CXXALIASWARN1 (strstr, const char *,
 618                    (const char *haystack, const char *needle));
 619 # elif __GLIBC__ >= 2
 620 _GL_CXXALIASWARN (strstr);
 621 # endif
 622 #elif defined GNULIB_POSIXCHECK
 623 /* strstr() does not work with multibyte strings if the locale encoding is
 624    different from UTF-8:
 625    POSIX says that it operates on "strings", and "string" in POSIX is defined
 626    as a sequence of bytes, not of characters.  */
 627 # undef strstr
 628 /* Assume strstr is always declared.  */
 629 _GL_WARN_ON_USE (strstr, "strstr is quadratic on many systems, and cannot "
 630                  "work correctly on character strings in most "
 631                  "multibyte locales - "
 632                  "use mbsstr if you care about internationalization, "
 633                  "or use strstr if you care about speed");
 634 #endif
 635
 636 /* Find the first occurrence of NEEDLE in HAYSTACK, using case-insensitive
 637    comparison.  */
 638 #if @GNULIB_STRCASESTR@
 639 # if @REPLACE_STRCASESTR@
 640 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 641 #   define strcasestr rpl_strcasestr
 642 #  endif
 643 _GL_FUNCDECL_RPL (strcasestr, char *,
 644                   (const char *haystack, const char *needle)
 645                   _GL_ATTRIBUTE_PURE
 646                   _GL_ARG_NONNULL ((1, 2)));
 647 _GL_CXXALIAS_RPL (strcasestr, char *,
 648                   (const char *haystack, const char *needle));
 649 # else
 650 #  if ! @HAVE_STRCASESTR@
 651 _GL_FUNCDECL_SYS (strcasestr, char *,
 652                   (const char *haystack, const char *needle)
 653                   _GL_ATTRIBUTE_PURE
 654                   _GL_ARG_NONNULL ((1, 2)));
 655 #  endif
 656   /* On some systems, this function is defined as an overloaded function:
 657        extern "C++" { const char * strcasestr (const char *, const char *); }
 658        extern "C++" { char * strcasestr (char *, const char *); }  */
 659 _GL_CXXALIAS_SYS_CAST2 (strcasestr,
 660                         char *, (const char *haystack, const char *needle),
 661                         const char *, (const char *haystack, const char *needle));
 662 # endif
 663 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 664      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 665 _GL_CXXALIASWARN1 (strcasestr, char *, (char *haystack, const char *needle));
 666 _GL_CXXALIASWARN1 (strcasestr, const char *,
 667                    (const char *haystack, const char *needle));
 668 # else
 669 _GL_CXXALIASWARN (strcasestr);
 670 # endif
 671 #elif defined GNULIB_POSIXCHECK
 672 /* strcasestr() does not work with multibyte strings:
 673    It is a glibc extension, and glibc implements it only for unibyte
 674    locales.  */
 675 # undef strcasestr
 676 # if HAVE_RAW_DECL_STRCASESTR
 677 _GL_WARN_ON_USE (strcasestr, "strcasestr does work correctly on character "
 678                  "strings in multibyte locales - "
 679                  "use mbscasestr if you care about "
 680                  "internationalization, or use c-strcasestr if you want "
 681                  "a locale independent function");
 682 # endif
 683 #endif
 684
 685 /* Parse S into tokens separated by characters in DELIM.
 686    If S is NULL, the saved pointer in SAVE_PTR is used as
 687    the next starting point.  For example:
 688         char s[] = "-abc-=-def";
 689         char *sp;
 690         x = strtok_r(s, "-", &sp);      // x = "abc", sp = "=-def"
 691         x = strtok_r(NULL, "-=", &sp);  // x = "def", sp = NULL
 692         x = strtok_r(NULL, "=", &sp);   // x = NULL
 693                 // s = "abc\0-def\0"
 694
 695    This is a variant of strtok() that is multithread-safe.
 696
 697    For the POSIX documentation for this function, see:
 698    https://pubs.opengroup.org/onlinepubs/9699919799/functions/strtok.html
 699
 700    Caveat: It modifies the original string.
 701    Caveat: These functions cannot be used on constant strings.
 702    Caveat: The identity of the delimiting character is lost.
 703    Caveat: It doesn't work with multibyte strings unless all of the delimiter
 704            characters are ASCII characters < 0x30.
 705
 706    See also strsep().  */
 707 #if @GNULIB_STRTOK_R@
 708 # if @REPLACE_STRTOK_R@
 709 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 710 #   undef strtok_r
 711 #   define strtok_r rpl_strtok_r
 712 #  endif
 713 _GL_FUNCDECL_RPL (strtok_r, char *,
 714                   (char *restrict s, char const *restrict delim,
 715                    char **restrict save_ptr)
 716                   _GL_ARG_NONNULL ((2, 3)));
 717 _GL_CXXALIAS_RPL (strtok_r, char *,
 718                   (char *restrict s, char const *restrict delim,
 719                    char **restrict save_ptr));
 720 # else
 721 #  if @UNDEFINE_STRTOK_R@ || defined GNULIB_POSIXCHECK
 722 #   undef strtok_r
 723 #  endif
 724 #  if ! @HAVE_DECL_STRTOK_R@
 725 _GL_FUNCDECL_SYS (strtok_r, char *,
 726                   (char *restrict s, char const *restrict delim,
 727                    char **restrict save_ptr)
 728                   _GL_ARG_NONNULL ((2, 3)));
 729 #  endif
 730 _GL_CXXALIAS_SYS (strtok_r, char *,
 731                   (char *restrict s, char const *restrict delim,
 732                    char **restrict save_ptr));
 733 # endif
 734 _GL_CXXALIASWARN (strtok_r);
 735 # if defined GNULIB_POSIXCHECK
 736 _GL_WARN_ON_USE (strtok_r, "strtok_r cannot work correctly on character "
 737                  "strings in multibyte locales - "
 738                  "use mbstok_r if you care about internationalization");
 739 # endif
 740 #elif defined GNULIB_POSIXCHECK
 741 # undef strtok_r
 742 # if HAVE_RAW_DECL_STRTOK_R
 743 _GL_WARN_ON_USE (strtok_r, "strtok_r is unportable - "
 744                  "use gnulib module strtok_r for portability");
 745 # endif
 746 #endif
 747
 748
 749 /* The following functions are not specified by POSIX.  They are gnulib
 750    extensions.  */
 751
 752 #if @GNULIB_MBSLEN@
 753 /* Return the number of multibyte characters in the character string STRING.
 754    This considers multibyte characters, unlike strlen, which counts bytes.  */
 755 # ifdef __MirBSD__  /* MirBSD defines mbslen as a macro.  Override it.  */
 756 #  undef mbslen
 757 # endif
 758 # if @HAVE_MBSLEN@  /* AIX, OSF/1, MirBSD define mbslen already in libc.  */
 759 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 760 #   define mbslen rpl_mbslen
 761 #  endif
 762 _GL_FUNCDECL_RPL (mbslen, size_t, (const char *string)
 763                                   _GL_ATTRIBUTE_PURE
 764                                   _GL_ARG_NONNULL ((1)));
 765 _GL_CXXALIAS_RPL (mbslen, size_t, (const char *string));
 766 # else
 767 _GL_FUNCDECL_SYS (mbslen, size_t, (const char *string)
 768                                   _GL_ATTRIBUTE_PURE
 769                                   _GL_ARG_NONNULL ((1)));
 770 _GL_CXXALIAS_SYS (mbslen, size_t, (const char *string));
 771 # endif
 772 _GL_CXXALIASWARN (mbslen);
 773 #endif
 774
 775 #if @GNULIB_MBSNLEN@
 776 /* Return the number of multibyte characters in the character string starting
 777    at STRING and ending at STRING + LEN.  */
 778 _GL_EXTERN_C size_t mbsnlen (const char *string, size_t len)
 779      _GL_ATTRIBUTE_PURE
 780      _GL_ARG_NONNULL ((1));
 781 #endif
 782
 783 #if @GNULIB_MBSCHR@
 784 /* Locate the first single-byte character C in the character string STRING,
 785    and return a pointer to it.  Return NULL if C is not found in STRING.
 786    Unlike strchr(), this function works correctly in multibyte locales with
 787    encodings such as GB18030.  */
 788 # if defined __hpux
 789 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 790 #   define mbschr rpl_mbschr /* avoid collision with HP-UX function */
 791 #  endif
 792 _GL_FUNCDECL_RPL (mbschr, char *, (const char *string, int c)
 793                                   _GL_ATTRIBUTE_PURE
 794                                   _GL_ARG_NONNULL ((1)));
 795 _GL_CXXALIAS_RPL (mbschr, char *, (const char *string, int c));
 796 # else
 797 _GL_FUNCDECL_SYS (mbschr, char *, (const char *string, int c)
 798                                   _GL_ATTRIBUTE_PURE
 799                                   _GL_ARG_NONNULL ((1)));
 800 _GL_CXXALIAS_SYS (mbschr, char *, (const char *string, int c));
 801 # endif
 802 _GL_CXXALIASWARN (mbschr);
 803 #endif
 804
 805 #if @GNULIB_MBSRCHR@
 806 /* Locate the last single-byte character C in the character string STRING,
 807    and return a pointer to it.  Return NULL if C is not found in STRING.
 808    Unlike strrchr(), this function works correctly in multibyte locales with
 809    encodings such as GB18030.  */
 810 # if defined __hpux || defined __INTERIX
 811 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 812 #   define mbsrchr rpl_mbsrchr /* avoid collision with system function */
 813 #  endif
 814 _GL_FUNCDECL_RPL (mbsrchr, char *, (const char *string, int c)
 815                                    _GL_ATTRIBUTE_PURE
 816                                    _GL_ARG_NONNULL ((1)));
 817 _GL_CXXALIAS_RPL (mbsrchr, char *, (const char *string, int c));
 818 # else
 819 _GL_FUNCDECL_SYS (mbsrchr, char *, (const char *string, int c)
 820                                    _GL_ATTRIBUTE_PURE
 821                                    _GL_ARG_NONNULL ((1)));
 822 _GL_CXXALIAS_SYS (mbsrchr, char *, (const char *string, int c));
 823 # endif
 824 _GL_CXXALIASWARN (mbsrchr);
 825 #endif
 826
 827 #if @GNULIB_MBSSTR@
 828 /* Find the first occurrence of the character string NEEDLE in the character
 829    string HAYSTACK.  Return NULL if NEEDLE is not found in HAYSTACK.
 830    Unlike strstr(), this function works correctly in multibyte locales with
 831    encodings different from UTF-8.  */
 832 _GL_EXTERN_C char * mbsstr (const char *haystack, const char *needle)
 833      _GL_ATTRIBUTE_PURE
 834      _GL_ARG_NONNULL ((1, 2));
 835 #endif
 836
 837 #if @GNULIB_MBSCASECMP@
 838 /* Compare the character strings S1 and S2, ignoring case, returning less than,
 839    equal to or greater than zero if S1 is lexicographically less than, equal to
 840    or greater than S2.
 841    Note: This function may, in multibyte locales, return 0 for strings of
 842    different lengths!
 843    Unlike strcasecmp(), this function works correctly in multibyte locales.  */
 844 _GL_EXTERN_C int mbscasecmp (const char *s1, const char *s2)
 845      _GL_ATTRIBUTE_PURE
 846      _GL_ARG_NONNULL ((1, 2));
 847 #endif
 848
 849 #if @GNULIB_MBSNCASECMP@
 850 /* Compare the initial segment of the character string S1 consisting of at most
 851    N characters with the initial segment of the character string S2 consisting
 852    of at most N characters, ignoring case, returning less than, equal to or
 853    greater than zero if the initial segment of S1 is lexicographically less
 854    than, equal to or greater than the initial segment of S2.
 855    Note: This function may, in multibyte locales, return 0 for initial segments
 856    of different lengths!
 857    Unlike strncasecmp(), this function works correctly in multibyte locales.
 858    But beware that N is not a byte count but a character count!  */
 859 _GL_EXTERN_C int mbsncasecmp (const char *s1, const char *s2, size_t n)
 860      _GL_ATTRIBUTE_PURE
 861      _GL_ARG_NONNULL ((1, 2));
 862 #endif
 863
 864 #if @GNULIB_MBSPCASECMP@
 865 /* Compare the initial segment of the character string STRING consisting of
 866    at most mbslen (PREFIX) characters with the character string PREFIX,
 867    ignoring case.  If the two match, return a pointer to the first byte
 868    after this prefix in STRING.  Otherwise, return NULL.
 869    Note: This function may, in multibyte locales, return non-NULL if STRING
 870    is of smaller length than PREFIX!
 871    Unlike strncasecmp(), this function works correctly in multibyte
 872    locales.  */
 873 _GL_EXTERN_C char * mbspcasecmp (const char *string, const char *prefix)
 874      _GL_ATTRIBUTE_PURE
 875      _GL_ARG_NONNULL ((1, 2));
 876 #endif
 877
 878 #if @GNULIB_MBSCASESTR@
 879 /* Find the first occurrence of the character string NEEDLE in the character
 880    string HAYSTACK, using case-insensitive comparison.
 881    Note: This function may, in multibyte locales, return success even if
 882    strlen (haystack) < strlen (needle) !
 883    Unlike strcasestr(), this function works correctly in multibyte locales.  */
 884 _GL_EXTERN_C char * mbscasestr (const char *haystack, const char *needle)
 885      _GL_ATTRIBUTE_PURE
 886      _GL_ARG_NONNULL ((1, 2));
 887 #endif
 888
 889 #if @GNULIB_MBSCSPN@
 890 /* Find the first occurrence in the character string STRING of any character
 891    in the character string ACCEPT.  Return the number of bytes from the
 892    beginning of the string to this occurrence, or to the end of the string
 893    if none exists.
 894    Unlike strcspn(), this function works correctly in multibyte locales.  */
 895 _GL_EXTERN_C size_t mbscspn (const char *string, const char *accept)
 896      _GL_ATTRIBUTE_PURE
 897      _GL_ARG_NONNULL ((1, 2));
 898 #endif
 899
 900 #if @GNULIB_MBSPBRK@
 901 /* Find the first occurrence in the character string STRING of any character
 902    in the character string ACCEPT.  Return the pointer to it, or NULL if none
 903    exists.
 904    Unlike strpbrk(), this function works correctly in multibyte locales.  */
 905 # if defined __hpux
 906 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 907 #   define mbspbrk rpl_mbspbrk /* avoid collision with HP-UX function */
 908 #  endif
 909 _GL_FUNCDECL_RPL (mbspbrk, char *, (const char *string, const char *accept)
 910                                    _GL_ATTRIBUTE_PURE
 911                                    _GL_ARG_NONNULL ((1, 2)));
 912 _GL_CXXALIAS_RPL (mbspbrk, char *, (const char *string, const char *accept));
 913 # else
 914 _GL_FUNCDECL_SYS (mbspbrk, char *, (const char *string, const char *accept)
 915                                    _GL_ATTRIBUTE_PURE
 916                                    _GL_ARG_NONNULL ((1, 2)));
 917 _GL_CXXALIAS_SYS (mbspbrk, char *, (const char *string, const char *accept));
 918 # endif
 919 _GL_CXXALIASWARN (mbspbrk);
 920 #endif
 921
 922 #if @GNULIB_MBSSPN@
 923 /* Find the first occurrence in the character string STRING of any character
 924    not in the character string REJECT.  Return the number of bytes from the
 925    beginning of the string to this occurrence, or to the end of the string
 926    if none exists.
 927    Unlike strspn(), this function works correctly in multibyte locales.  */
 928 _GL_EXTERN_C size_t mbsspn (const char *string, const char *reject)
 929      _GL_ATTRIBUTE_PURE
 930      _GL_ARG_NONNULL ((1, 2));
 931 #endif
 932
 933 #if @GNULIB_MBSSEP@
 934 /* Search the next delimiter (multibyte character listed in the character
 935    string DELIM) starting at the character string *STRINGP.
 936    If one is found, overwrite it with a NUL, and advance *STRINGP to point
 937    to the next multibyte character after it.  Otherwise, set *STRINGP to NULL.
 938    If *STRINGP was already NULL, nothing happens.
 939    Return the old value of *STRINGP.
 940
 941    This is a variant of mbstok_r() that supports empty fields.
 942
 943    Caveat: It modifies the original string.
 944    Caveat: These functions cannot be used on constant strings.
 945    Caveat: The identity of the delimiting character is lost.
 946
 947    See also mbstok_r().  */
 948 _GL_EXTERN_C char * mbssep (char **stringp, const char *delim)
 949      _GL_ARG_NONNULL ((1, 2));
 950 #endif
 951
 952 #if @GNULIB_MBSTOK_R@
 953 /* Parse the character string STRING into tokens separated by characters in
 954    the character string DELIM.
 955    If STRING is NULL, the saved pointer in SAVE_PTR is used as
 956    the next starting point.  For example:
 957         char s[] = "-abc-=-def";
 958         char *sp;
 959         x = mbstok_r(s, "-", &sp);      // x = "abc", sp = "=-def"
 960         x = mbstok_r(NULL, "-=", &sp);  // x = "def", sp = NULL
 961         x = mbstok_r(NULL, "=", &sp);   // x = NULL
 962                 // s = "abc\0-def\0"
 963
 964    Caveat: It modifies the original string.
 965    Caveat: These functions cannot be used on constant strings.
 966    Caveat: The identity of the delimiting character is lost.
 967
 968    See also mbssep().  */
 969 _GL_EXTERN_C char * mbstok_r (char *string, const char *delim, char **save_ptr)
 970      _GL_ARG_NONNULL ((2, 3));
 971 #endif
 972
 973 /* Map any int, typically from errno, into an error message.  */
 974 #if @GNULIB_STRERROR@
 975 # if @REPLACE_STRERROR@
 976 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 977 #   undef strerror
 978 #   define strerror rpl_strerror
 979 #  endif
 980 _GL_FUNCDECL_RPL (strerror, char *, (int));
 981 _GL_CXXALIAS_RPL (strerror, char *, (int));
 982 # else
 983 _GL_CXXALIAS_SYS (strerror, char *, (int));
 984 # endif
 985 # if __GLIBC__ >= 2
 986 _GL_CXXALIASWARN (strerror);
 987 # endif
 988 #elif defined GNULIB_POSIXCHECK
 989 # undef strerror
 990 /* Assume strerror is always declared.  */
 991 _GL_WARN_ON_USE (strerror, "strerror is unportable - "
 992                  "use gnulib module strerror to guarantee non-NULL result");
 993 #endif
 994
 995 /* Map any int, typically from errno, into an error message.  Multithread-safe.
 996    Uses the POSIX declaration, not the glibc declaration.  */
 997 #if @GNULIB_STRERROR_R@
 998 # if @REPLACE_STRERROR_R@
 999 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1000 #   undef strerror_r
1001 #   define strerror_r rpl_strerror_r
1002 #  endif
1003 _GL_FUNCDECL_RPL (strerror_r, int, (int errnum, char *buf, size_t buflen)
1004                                    _GL_ARG_NONNULL ((2)));
1005 _GL_CXXALIAS_RPL (strerror_r, int, (int errnum, char *buf, size_t buflen));
1006 # else
1007 #  if !@HAVE_DECL_STRERROR_R@
1008 _GL_FUNCDECL_SYS (strerror_r, int, (int errnum, char *buf, size_t buflen)
1009                                    _GL_ARG_NONNULL ((2)));
1010 #  endif
1011 _GL_CXXALIAS_SYS (strerror_r, int, (int errnum, char *buf, size_t buflen));
1012 # endif
1013 # if @HAVE_DECL_STRERROR_R@
1014 _GL_CXXALIASWARN (strerror_r);
1015 # endif
1016 #elif defined GNULIB_POSIXCHECK
1017 # undef strerror_r
1018 # if HAVE_RAW_DECL_STRERROR_R
1019 _GL_WARN_ON_USE (strerror_r, "strerror_r is unportable - "
1020                  "use gnulib module strerror_r-posix for portability");
1021 # endif
1022 #endif
1023
1024 #if @GNULIB_STRSIGNAL@
1025 # if @REPLACE_STRSIGNAL@
1026 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1027 #   define strsignal rpl_strsignal
1028 #  endif
1029 _GL_FUNCDECL_RPL (strsignal, char *, (int __sig));
1030 _GL_CXXALIAS_RPL (strsignal, char *, (int __sig));
1031 # else
1032 #  if ! @HAVE_DECL_STRSIGNAL@
1033 _GL_FUNCDECL_SYS (strsignal, char *, (int __sig));
1034 #  endif
1035 /* Need to cast, because on Cygwin 1.5.x systems, the return type is
1036    'const char *'.  */
1037 _GL_CXXALIAS_SYS_CAST (strsignal, char *, (int __sig));
1038 # endif
1039 _GL_CXXALIASWARN (strsignal);
1040 #elif defined GNULIB_POSIXCHECK
1041 # undef strsignal
1042 # if HAVE_RAW_DECL_STRSIGNAL
1043 _GL_WARN_ON_USE (strsignal, "strsignal is unportable - "
1044                  "use gnulib module strsignal for portability");
1045 # endif
1046 #endif
1047
1048 #if @GNULIB_STRVERSCMP@
1049 # if !@HAVE_STRVERSCMP@
1050 _GL_FUNCDECL_SYS (strverscmp, int, (const char *, const char *)
1051                                    _GL_ATTRIBUTE_PURE
1052                                    _GL_ARG_NONNULL ((1, 2)));
1053 # endif
1054 _GL_CXXALIAS_SYS (strverscmp, int, (const char *, const char *));
1055 _GL_CXXALIASWARN (strverscmp);
1056 #elif defined GNULIB_POSIXCHECK
1057 # undef strverscmp
1058 # if HAVE_RAW_DECL_STRVERSCMP
1059 _GL_WARN_ON_USE (strverscmp, "strverscmp is unportable - "
1060                  "use gnulib module strverscmp for portability");
1061 # endif
1062 #endif
1063
1064
1065 #endif /* _@GUARD_PREFIX@_STRING_H */
1066 #endif /* _@GUARD_PREFIX@_STRING_H */
1067 #endif