lib/string.in.h

   1 /* A GNU-like <string.h>.
   2
   3    Copyright (C) 1995-1996, 2001-2011 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 Lesser General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 #ifndef _GL_STRING_H
  20
  21 #if __GNUC__ >= 3
  22 @PRAGMA_SYSTEM_HEADER@
  23 #endif
  24 @PRAGMA_COLUMNS@
  25
  26 /* The include_next requires a split double-inclusion guard.  */
  27 #@INCLUDE_NEXT@ @NEXT_STRING_H@
  28
  29 #ifndef _GL_STRING_H
  30 #define _GL_STRING_H
  31
  32 /* NetBSD 5.0 mis-defines NULL.  */
  33 #include <stddef.h>
  34
  35 /* MirBSD defines mbslen as a macro.  */
  36 #if @GNULIB_MBSLEN@ && defined __MirBSD__
  37 # include <wchar.h>
  38 #endif
  39
  40 /* The __attribute__ feature is available in gcc versions 2.5 and later.
  41    The attribute __pure__ was added in gcc 2.96.  */
  42 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
  43 # define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
  44 #else
  45 # define _GL_ATTRIBUTE_PURE /* empty */
  46 #endif
  47
  48 /* NetBSD 5.0 declares strsignal in <unistd.h>, not in <string.h>.  */
  49 /* But in any case avoid namespace pollution on glibc systems.  */
  50 #if (@GNULIB_STRSIGNAL@ || defined GNULIB_POSIXCHECK) && defined __NetBSD__ \
  51     && ! defined __GLIBC__
  52 # include <unistd.h>
  53 #endif
  54
  55 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
  56
  57 /* The definition of _GL_ARG_NONNULL is copied here.  */
  58
  59 /* The definition of _GL_WARN_ON_USE is copied here.  */
  60
  61
  62 /* Return the first instance of C within N bytes of S, or NULL.  */
  63 #if @GNULIB_MEMCHR@
  64 # if @REPLACE_MEMCHR@
  65 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
  66 #   define memchr rpl_memchr
  67 #  endif
  68 _GL_FUNCDECL_RPL (memchr, void *, (void const *__s, int __c, size_t __n)
  69                                   _GL_ATTRIBUTE_PURE
  70                                   _GL_ARG_NONNULL ((1)));
  71 _GL_CXXALIAS_RPL (memchr, void *, (void const *__s, int __c, size_t __n));
  72 # else
  73 #  if ! @HAVE_MEMCHR@
  74 _GL_FUNCDECL_SYS (memchr, void *, (void const *__s, int __c, size_t __n)
  75                                   _GL_ATTRIBUTE_PURE
  76                                   _GL_ARG_NONNULL ((1)));
  77 #  endif
  78   /* On some systems, this function is defined as an overloaded function:
  79        extern "C" { const void * std::memchr (const void *, int, size_t); }
  80        extern "C++" { void * std::memchr (void *, int, size_t); }  */
  81 _GL_CXXALIAS_SYS_CAST2 (memchr,
  82                         void *, (void const *__s, int __c, size_t __n),
  83                         void const *, (void const *__s, int __c, size_t __n));
  84 # endif
  85 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
  86      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
  87 _GL_CXXALIASWARN1 (memchr, void *, (void *__s, int __c, size_t __n));
  88 _GL_CXXALIASWARN1 (memchr, void const *,
  89                    (void const *__s, int __c, size_t __n));
  90 # else
  91 _GL_CXXALIASWARN (memchr);
  92 # endif
  93 #elif defined GNULIB_POSIXCHECK
  94 # undef memchr
  95 /* Assume memchr is always declared.  */
  96 _GL_WARN_ON_USE (memchr, "memchr has platform-specific bugs - "
  97                  "use gnulib module memchr for portability" );
  98 #endif
  99
 100 /* Return the first occurrence of NEEDLE in HAYSTACK.  */
 101 #if @GNULIB_MEMMEM@
 102 # if @REPLACE_MEMMEM@
 103 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 104 #   define memmem rpl_memmem
 105 #  endif
 106 _GL_FUNCDECL_RPL (memmem, void *,
 107                   (void const *__haystack, size_t __haystack_len,
 108                    void const *__needle, size_t __needle_len)
 109                   _GL_ATTRIBUTE_PURE
 110                   _GL_ARG_NONNULL ((1, 3)));
 111 _GL_CXXALIAS_RPL (memmem, void *,
 112                   (void const *__haystack, size_t __haystack_len,
 113                    void const *__needle, size_t __needle_len));
 114 # else
 115 #  if ! @HAVE_DECL_MEMMEM@
 116 _GL_FUNCDECL_SYS (memmem, void *,
 117                   (void const *__haystack, size_t __haystack_len,
 118                    void const *__needle, size_t __needle_len)
 119                   _GL_ATTRIBUTE_PURE
 120                   _GL_ARG_NONNULL ((1, 3)));
 121 #  endif
 122 _GL_CXXALIAS_SYS (memmem, void *,
 123                   (void const *__haystack, size_t __haystack_len,
 124                    void const *__needle, size_t __needle_len));
 125 # endif
 126 _GL_CXXALIASWARN (memmem);
 127 #elif defined GNULIB_POSIXCHECK
 128 # undef memmem
 129 # if HAVE_RAW_DECL_MEMMEM
 130 _GL_WARN_ON_USE (memmem, "memmem is unportable and often quadratic - "
 131                  "use gnulib module memmem-simple for portability, "
 132                  "and module memmem for speed" );
 133 # endif
 134 #endif
 135
 136 /* Copy N bytes of SRC to DEST, return pointer to bytes after the
 137    last written byte.  */
 138 #if @GNULIB_MEMPCPY@
 139 # if ! @HAVE_MEMPCPY@
 140 _GL_FUNCDECL_SYS (mempcpy, void *,
 141                   (void *restrict __dest, void const *restrict __src,
 142                    size_t __n)
 143                   _GL_ARG_NONNULL ((1, 2)));
 144 # endif
 145 _GL_CXXALIAS_SYS (mempcpy, void *,
 146                   (void *restrict __dest, void const *restrict __src,
 147                    size_t __n));
 148 _GL_CXXALIASWARN (mempcpy);
 149 #elif defined GNULIB_POSIXCHECK
 150 # undef mempcpy
 151 # if HAVE_RAW_DECL_MEMPCPY
 152 _GL_WARN_ON_USE (mempcpy, "mempcpy is unportable - "
 153                  "use gnulib module mempcpy for portability");
 154 # endif
 155 #endif
 156
 157 /* Search backwards through a block for a byte (specified as an int).  */
 158 #if @GNULIB_MEMRCHR@
 159 # if ! @HAVE_DECL_MEMRCHR@
 160 _GL_FUNCDECL_SYS (memrchr, void *, (void const *, int, size_t)
 161                                    _GL_ATTRIBUTE_PURE
 162                                    _GL_ARG_NONNULL ((1)));
 163 # endif
 164   /* On some systems, this function is defined as an overloaded function:
 165        extern "C++" { const void * std::memrchr (const void *, int, size_t); }
 166        extern "C++" { void * std::memrchr (void *, int, size_t); }  */
 167 _GL_CXXALIAS_SYS_CAST2 (memrchr,
 168                         void *, (void const *, int, size_t),
 169                         void const *, (void const *, int, size_t));
 170 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 171      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 172 _GL_CXXALIASWARN1 (memrchr, void *, (void *, int, size_t));
 173 _GL_CXXALIASWARN1 (memrchr, void const *, (void const *, int, size_t));
 174 # else
 175 _GL_CXXALIASWARN (memrchr);
 176 # endif
 177 #elif defined GNULIB_POSIXCHECK
 178 # undef memrchr
 179 # if HAVE_RAW_DECL_MEMRCHR
 180 _GL_WARN_ON_USE (memrchr, "memrchr is unportable - "
 181                  "use gnulib module memrchr for portability");
 182 # endif
 183 #endif
 184
 185 /* Find the first occurrence of C in S.  More efficient than
 186    memchr(S,C,N), at the expense of undefined behavior if C does not
 187    occur within N bytes.  */
 188 #if @GNULIB_RAWMEMCHR@
 189 # if ! @HAVE_RAWMEMCHR@
 190 _GL_FUNCDECL_SYS (rawmemchr, void *, (void const *__s, int __c_in)
 191                                      _GL_ATTRIBUTE_PURE
 192                                      _GL_ARG_NONNULL ((1)));
 193 # endif
 194   /* On some systems, this function is defined as an overloaded function:
 195        extern "C++" { const void * std::rawmemchr (const void *, int); }
 196        extern "C++" { void * std::rawmemchr (void *, int); }  */
 197 _GL_CXXALIAS_SYS_CAST2 (rawmemchr,
 198                         void *, (void const *__s, int __c_in),
 199                         void const *, (void const *__s, int __c_in));
 200 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 201      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 202 _GL_CXXALIASWARN1 (rawmemchr, void *, (void *__s, int __c_in));
 203 _GL_CXXALIASWARN1 (rawmemchr, void const *, (void const *__s, int __c_in));
 204 # else
 205 _GL_CXXALIASWARN (rawmemchr);
 206 # endif
 207 #elif defined GNULIB_POSIXCHECK
 208 # undef rawmemchr
 209 # if HAVE_RAW_DECL_RAWMEMCHR
 210 _GL_WARN_ON_USE (rawmemchr, "rawmemchr is unportable - "
 211                  "use gnulib module rawmemchr for portability");
 212 # endif
 213 #endif
 214
 215 /* Copy SRC to DST, returning the address of the terminating '\0' in DST.  */
 216 #if @GNULIB_STPCPY@
 217 # if ! @HAVE_STPCPY@
 218 _GL_FUNCDECL_SYS (stpcpy, char *,
 219                   (char *restrict __dst, char const *restrict __src)
 220                   _GL_ARG_NONNULL ((1, 2)));
 221 # endif
 222 _GL_CXXALIAS_SYS (stpcpy, char *,
 223                   (char *restrict __dst, char const *restrict __src));
 224 _GL_CXXALIASWARN (stpcpy);
 225 #elif defined GNULIB_POSIXCHECK
 226 # undef stpcpy
 227 # if HAVE_RAW_DECL_STPCPY
 228 _GL_WARN_ON_USE (stpcpy, "stpcpy is unportable - "
 229                  "use gnulib module stpcpy for portability");
 230 # endif
 231 #endif
 232
 233 /* Copy no more than N bytes of SRC to DST, returning a pointer past the
 234    last non-NUL byte written into DST.  */
 235 #if @GNULIB_STPNCPY@
 236 # if @REPLACE_STPNCPY@
 237 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 238 #   undef stpncpy
 239 #   define stpncpy rpl_stpncpy
 240 #  endif
 241 _GL_FUNCDECL_RPL (stpncpy, char *,
 242                   (char *restrict __dst, char const *restrict __src,
 243                    size_t __n)
 244                   _GL_ARG_NONNULL ((1, 2)));
 245 _GL_CXXALIAS_RPL (stpncpy, char *,
 246                   (char *restrict __dst, char const *restrict __src,
 247                    size_t __n));
 248 # else
 249 #  if ! @HAVE_STPNCPY@
 250 _GL_FUNCDECL_SYS (stpncpy, char *,
 251                   (char *restrict __dst, char const *restrict __src,
 252                    size_t __n)
 253                   _GL_ARG_NONNULL ((1, 2)));
 254 #  endif
 255 _GL_CXXALIAS_SYS (stpncpy, char *,
 256                   (char *restrict __dst, char const *restrict __src,
 257                    size_t __n));
 258 # endif
 259 _GL_CXXALIASWARN (stpncpy);
 260 #elif defined GNULIB_POSIXCHECK
 261 # undef stpncpy
 262 # if HAVE_RAW_DECL_STPNCPY
 263 _GL_WARN_ON_USE (stpncpy, "stpncpy is unportable - "
 264                  "use gnulib module stpncpy for portability");
 265 # endif
 266 #endif
 267
 268 #if defined GNULIB_POSIXCHECK
 269 /* strchr() does not work with multibyte strings if the locale encoding is
 270    GB18030 and the character to be searched is a digit.  */
 271 # undef strchr
 272 /* Assume strchr is always declared.  */
 273 _GL_WARN_ON_USE (strchr, "strchr cannot work correctly on character strings "
 274                  "in some multibyte locales - "
 275                  "use mbschr if you care about internationalization");
 276 #endif
 277
 278 /* Find the first occurrence of C in S or the final NUL byte.  */
 279 #if @GNULIB_STRCHRNUL@
 280 # if @REPLACE_STRCHRNUL@
 281 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 282 #   define strchrnul rpl_strchrnul
 283 #  endif
 284 _GL_FUNCDECL_RPL (strchrnul, char *, (const char *__s, int __c_in)
 285                                      _GL_ATTRIBUTE_PURE
 286                                      _GL_ARG_NONNULL ((1)));
 287 _GL_CXXALIAS_RPL (strchrnul, char *,
 288                   (const char *str, int ch));
 289 # else
 290 #  if ! @HAVE_STRCHRNUL@
 291 _GL_FUNCDECL_SYS (strchrnul, char *, (char const *__s, int __c_in)
 292                                      _GL_ATTRIBUTE_PURE
 293                                      _GL_ARG_NONNULL ((1)));
 294 #  endif
 295   /* On some systems, this function is defined as an overloaded function:
 296        extern "C++" { const char * std::strchrnul (const char *, int); }
 297        extern "C++" { char * std::strchrnul (char *, int); }  */
 298 _GL_CXXALIAS_SYS_CAST2 (strchrnul,
 299                         char *, (char const *__s, int __c_in),
 300                         char const *, (char const *__s, int __c_in));
 301 # endif
 302 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 303      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 304 _GL_CXXALIASWARN1 (strchrnul, char *, (char *__s, int __c_in));
 305 _GL_CXXALIASWARN1 (strchrnul, char const *, (char const *__s, int __c_in));
 306 # else
 307 _GL_CXXALIASWARN (strchrnul);
 308 # endif
 309 #elif defined GNULIB_POSIXCHECK
 310 # undef strchrnul
 311 # if HAVE_RAW_DECL_STRCHRNUL
 312 _GL_WARN_ON_USE (strchrnul, "strchrnul is unportable - "
 313                  "use gnulib module strchrnul for portability");
 314 # endif
 315 #endif
 316
 317 /* Duplicate S, returning an identical malloc'd string.  */
 318 #if @GNULIB_STRDUP@
 319 # if @REPLACE_STRDUP@
 320 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 321 #   undef strdup
 322 #   define strdup rpl_strdup
 323 #  endif
 324 _GL_FUNCDECL_RPL (strdup, char *, (char const *__s) _GL_ARG_NONNULL ((1)));
 325 _GL_CXXALIAS_RPL (strdup, char *, (char const *__s));
 326 # else
 327 #  if defined __cplusplus && defined GNULIB_NAMESPACE && defined strdup
 328     /* strdup exists as a function and as a macro.  Get rid of the macro.  */
 329 #   undef strdup
 330 #  endif
 331 #  if !(@HAVE_DECL_STRDUP@ || defined strdup)
 332 _GL_FUNCDECL_SYS (strdup, char *, (char const *__s) _GL_ARG_NONNULL ((1)));
 333 #  endif
 334 _GL_CXXALIAS_SYS (strdup, char *, (char const *__s));
 335 # endif
 336 _GL_CXXALIASWARN (strdup);
 337 #elif defined GNULIB_POSIXCHECK
 338 # undef strdup
 339 # if HAVE_RAW_DECL_STRDUP
 340 _GL_WARN_ON_USE (strdup, "strdup is unportable - "
 341                  "use gnulib module strdup for portability");
 342 # endif
 343 #endif
 344
 345 /* Append no more than N characters from SRC onto DEST.  */
 346 #if @GNULIB_STRNCAT@
 347 # if @REPLACE_STRNCAT@
 348 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 349 #   undef strncat
 350 #   define strncat rpl_strncat
 351 #  endif
 352 _GL_FUNCDECL_RPL (strncat, char *, (char *dest, const char *src, size_t n)
 353                                    _GL_ARG_NONNULL ((1, 2)));
 354 _GL_CXXALIAS_RPL (strncat, char *, (char *dest, const char *src, size_t n));
 355 # else
 356 _GL_CXXALIAS_SYS (strncat, char *, (char *dest, const char *src, size_t n));
 357 # endif
 358 _GL_CXXALIASWARN (strncat);
 359 #elif defined GNULIB_POSIXCHECK
 360 # undef strncat
 361 # if HAVE_RAW_DECL_STRNCAT
 362 _GL_WARN_ON_USE (strncat, "strncat is unportable - "
 363                  "use gnulib module strncat for portability");
 364 # endif
 365 #endif
 366
 367 /* Return a newly allocated copy of at most N bytes of STRING.  */
 368 #if @GNULIB_STRNDUP@
 369 # if @REPLACE_STRNDUP@
 370 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 371 #   undef strndup
 372 #   define strndup rpl_strndup
 373 #  endif
 374 _GL_FUNCDECL_RPL (strndup, char *, (char const *__string, size_t __n)
 375                                    _GL_ARG_NONNULL ((1)));
 376 _GL_CXXALIAS_RPL (strndup, char *, (char const *__string, size_t __n));
 377 # else
 378 #  if ! @HAVE_DECL_STRNDUP@
 379 _GL_FUNCDECL_SYS (strndup, char *, (char const *__string, size_t __n)
 380                                    _GL_ARG_NONNULL ((1)));
 381 #  endif
 382 _GL_CXXALIAS_SYS (strndup, char *, (char const *__string, size_t __n));
 383 # endif
 384 _GL_CXXALIASWARN (strndup);
 385 #elif defined GNULIB_POSIXCHECK
 386 # undef strndup
 387 # if HAVE_RAW_DECL_STRNDUP
 388 _GL_WARN_ON_USE (strndup, "strndup is unportable - "
 389                  "use gnulib module strndup for portability");
 390 # endif
 391 #endif
 392
 393 /* Find the length (number of bytes) of STRING, but scan at most
 394    MAXLEN bytes.  If no '\0' terminator is found in that many bytes,
 395    return MAXLEN.  */
 396 #if @GNULIB_STRNLEN@
 397 # if @REPLACE_STRNLEN@
 398 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 399 #   undef strnlen
 400 #   define strnlen rpl_strnlen
 401 #  endif
 402 _GL_FUNCDECL_RPL (strnlen, size_t, (char const *__string, size_t __maxlen)
 403                                    _GL_ATTRIBUTE_PURE
 404                                    _GL_ARG_NONNULL ((1)));
 405 _GL_CXXALIAS_RPL (strnlen, size_t, (char const *__string, size_t __maxlen));
 406 # else
 407 #  if ! @HAVE_DECL_STRNLEN@
 408 _GL_FUNCDECL_SYS (strnlen, size_t, (char const *__string, size_t __maxlen)
 409                                    _GL_ATTRIBUTE_PURE
 410                                    _GL_ARG_NONNULL ((1)));
 411 #  endif
 412 _GL_CXXALIAS_SYS (strnlen, size_t, (char const *__string, size_t __maxlen));
 413 # endif
 414 _GL_CXXALIASWARN (strnlen);
 415 #elif defined GNULIB_POSIXCHECK
 416 # undef strnlen
 417 # if HAVE_RAW_DECL_STRNLEN
 418 _GL_WARN_ON_USE (strnlen, "strnlen is unportable - "
 419                  "use gnulib module strnlen for portability");
 420 # endif
 421 #endif
 422
 423 #if defined GNULIB_POSIXCHECK
 424 /* strcspn() assumes the second argument is a list of single-byte characters.
 425    Even in this simple case, it does not work with multibyte strings if the
 426    locale encoding is GB18030 and one of the characters to be searched is a
 427    digit.  */
 428 # undef strcspn
 429 /* Assume strcspn is always declared.  */
 430 _GL_WARN_ON_USE (strcspn, "strcspn cannot work correctly on character strings "
 431                  "in multibyte locales - "
 432                  "use mbscspn if you care about internationalization");
 433 #endif
 434
 435 /* Find the first occurrence in S of any character in ACCEPT.  */
 436 #if @GNULIB_STRPBRK@
 437 # if ! @HAVE_STRPBRK@
 438 _GL_FUNCDECL_SYS (strpbrk, char *, (char const *__s, char const *__accept)
 439                                    _GL_ATTRIBUTE_PURE
 440                                    _GL_ARG_NONNULL ((1, 2)));
 441 # endif
 442   /* On some systems, this function is defined as an overloaded function:
 443        extern "C" { const char * strpbrk (const char *, const char *); }
 444        extern "C++" { char * strpbrk (char *, const char *); }  */
 445 _GL_CXXALIAS_SYS_CAST2 (strpbrk,
 446                         char *, (char const *__s, char const *__accept),
 447                         const char *, (char const *__s, char const *__accept));
 448 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 449      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 450 _GL_CXXALIASWARN1 (strpbrk, char *, (char *__s, char const *__accept));
 451 _GL_CXXALIASWARN1 (strpbrk, char const *,
 452                    (char const *__s, char const *__accept));
 453 # else
 454 _GL_CXXALIASWARN (strpbrk);
 455 # endif
 456 # if defined GNULIB_POSIXCHECK
 457 /* strpbrk() assumes the second argument is a list of single-byte characters.
 458    Even in this simple case, it does not work with multibyte strings if the
 459    locale encoding is GB18030 and one of the characters to be searched is a
 460    digit.  */
 461 #  undef strpbrk
 462 _GL_WARN_ON_USE (strpbrk, "strpbrk cannot work correctly on character strings "
 463                  "in multibyte locales - "
 464                  "use mbspbrk if you care about internationalization");
 465 # endif
 466 #elif defined GNULIB_POSIXCHECK
 467 # undef strpbrk
 468 # if HAVE_RAW_DECL_STRPBRK
 469 _GL_WARN_ON_USE (strpbrk, "strpbrk is unportable - "
 470                  "use gnulib module strpbrk for portability");
 471 # endif
 472 #endif
 473
 474 #if defined GNULIB_POSIXCHECK
 475 /* strspn() assumes the second argument is a list of single-byte characters.
 476    Even in this simple case, it cannot work with multibyte strings.  */
 477 # undef strspn
 478 /* Assume strspn is always declared.  */
 479 _GL_WARN_ON_USE (strspn, "strspn cannot work correctly on character strings "
 480                  "in multibyte locales - "
 481                  "use mbsspn if you care about internationalization");
 482 #endif
 483
 484 #if defined GNULIB_POSIXCHECK
 485 /* strrchr() does not work with multibyte strings if the locale encoding is
 486    GB18030 and the character to be searched is a digit.  */
 487 # undef strrchr
 488 /* Assume strrchr is always declared.  */
 489 _GL_WARN_ON_USE (strrchr, "strrchr cannot work correctly on character strings "
 490                  "in some multibyte locales - "
 491                  "use mbsrchr if you care about internationalization");
 492 #endif
 493
 494 /* Search the next delimiter (char listed in DELIM) starting at *STRINGP.
 495    If one is found, overwrite it with a NUL, and advance *STRINGP
 496    to point to the next char after it.  Otherwise, set *STRINGP to NULL.
 497    If *STRINGP was already NULL, nothing happens.
 498    Return the old value of *STRINGP.
 499
 500    This is a variant of strtok() that is multithread-safe and supports
 501    empty fields.
 502
 503    Caveat: It modifies the original string.
 504    Caveat: These functions cannot be used on constant strings.
 505    Caveat: The identity of the delimiting character is lost.
 506    Caveat: It doesn't work with multibyte strings unless all of the delimiter
 507            characters are ASCII characters < 0x30.
 508
 509    See also strtok_r().  */
 510 #if @GNULIB_STRSEP@
 511 # if ! @HAVE_STRSEP@
 512 _GL_FUNCDECL_SYS (strsep, char *,
 513                   (char **restrict __stringp, char const *restrict __delim)
 514                   _GL_ARG_NONNULL ((1, 2)));
 515 # endif
 516 _GL_CXXALIAS_SYS (strsep, char *,
 517                   (char **restrict __stringp, char const *restrict __delim));
 518 _GL_CXXALIASWARN (strsep);
 519 # if defined GNULIB_POSIXCHECK
 520 #  undef strsep
 521 _GL_WARN_ON_USE (strsep, "strsep cannot work correctly on character strings "
 522                  "in multibyte locales - "
 523                  "use mbssep if you care about internationalization");
 524 # endif
 525 #elif defined GNULIB_POSIXCHECK
 526 # undef strsep
 527 # if HAVE_RAW_DECL_STRSEP
 528 _GL_WARN_ON_USE (strsep, "strsep is unportable - "
 529                  "use gnulib module strsep for portability");
 530 # endif
 531 #endif
 532
 533 #if @GNULIB_STRSTR@
 534 # if @REPLACE_STRSTR@
 535 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 536 #   define strstr rpl_strstr
 537 #  endif
 538 _GL_FUNCDECL_RPL (strstr, char *, (const char *haystack, const char *needle)
 539                                   _GL_ATTRIBUTE_PURE
 540                                   _GL_ARG_NONNULL ((1, 2)));
 541 _GL_CXXALIAS_RPL (strstr, char *, (const char *haystack, const char *needle));
 542 # else
 543   /* On some systems, this function is defined as an overloaded function:
 544        extern "C++" { const char * strstr (const char *, const char *); }
 545        extern "C++" { char * strstr (char *, const char *); }  */
 546 _GL_CXXALIAS_SYS_CAST2 (strstr,
 547                         char *, (const char *haystack, const char *needle),
 548                         const char *, (const char *haystack, const char *needle));
 549 # endif
 550 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 551      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 552 _GL_CXXALIASWARN1 (strstr, char *, (char *haystack, const char *needle));
 553 _GL_CXXALIASWARN1 (strstr, const char *,
 554                    (const char *haystack, const char *needle));
 555 # else
 556 _GL_CXXALIASWARN (strstr);
 557 # endif
 558 #elif defined GNULIB_POSIXCHECK
 559 /* strstr() does not work with multibyte strings if the locale encoding is
 560    different from UTF-8:
 561    POSIX says that it operates on "strings", and "string" in POSIX is defined
 562    as a sequence of bytes, not of characters.  */
 563 # undef strstr
 564 /* Assume strstr is always declared.  */
 565 _GL_WARN_ON_USE (strstr, "strstr is quadratic on many systems, and cannot "
 566                  "work correctly on character strings in most "
 567                  "multibyte locales - "
 568                  "use mbsstr if you care about internationalization, "
 569                  "or use strstr if you care about speed");
 570 #endif
 571
 572 /* Find the first occurrence of NEEDLE in HAYSTACK, using case-insensitive
 573    comparison.  */
 574 #if @GNULIB_STRCASESTR@
 575 # if @REPLACE_STRCASESTR@
 576 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 577 #   define strcasestr rpl_strcasestr
 578 #  endif
 579 _GL_FUNCDECL_RPL (strcasestr, char *,
 580                   (const char *haystack, const char *needle)
 581                   _GL_ATTRIBUTE_PURE
 582                   _GL_ARG_NONNULL ((1, 2)));
 583 _GL_CXXALIAS_RPL (strcasestr, char *,
 584                   (const char *haystack, const char *needle));
 585 # else
 586 #  if ! @HAVE_STRCASESTR@
 587 _GL_FUNCDECL_SYS (strcasestr, char *,
 588                   (const char *haystack, const char *needle)
 589                   _GL_ATTRIBUTE_PURE
 590                   _GL_ARG_NONNULL ((1, 2)));
 591 #  endif
 592   /* On some systems, this function is defined as an overloaded function:
 593        extern "C++" { const char * strcasestr (const char *, const char *); }
 594        extern "C++" { char * strcasestr (char *, const char *); }  */
 595 _GL_CXXALIAS_SYS_CAST2 (strcasestr,
 596                         char *, (const char *haystack, const char *needle),
 597                         const char *, (const char *haystack, const char *needle));
 598 # endif
 599 # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
 600      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 601 _GL_CXXALIASWARN1 (strcasestr, char *, (char *haystack, const char *needle));
 602 _GL_CXXALIASWARN1 (strcasestr, const char *,
 603                    (const char *haystack, const char *needle));
 604 # else
 605 _GL_CXXALIASWARN (strcasestr);
 606 # endif
 607 #elif defined GNULIB_POSIXCHECK
 608 /* strcasestr() does not work with multibyte strings:
 609    It is a glibc extension, and glibc implements it only for unibyte
 610    locales.  */
 611 # undef strcasestr
 612 # if HAVE_RAW_DECL_STRCASESTR
 613 _GL_WARN_ON_USE (strcasestr, "strcasestr does work correctly on character "
 614                  "strings in multibyte locales - "
 615                  "use mbscasestr if you care about "
 616                  "internationalization, or use c-strcasestr if you want "
 617                  "a locale independent function");
 618 # endif
 619 #endif
 620
 621 /* Parse S into tokens separated by characters in DELIM.
 622    If S is NULL, the saved pointer in SAVE_PTR is used as
 623    the next starting point.  For example:
 624         char s[] = "-abc-=-def";
 625         char *sp;
 626         x = strtok_r(s, "-", &sp);      // x = "abc", sp = "=-def"
 627         x = strtok_r(NULL, "-=", &sp);  // x = "def", sp = NULL
 628         x = strtok_r(NULL, "=", &sp);   // x = NULL
 629                 // s = "abc\0-def\0"
 630
 631    This is a variant of strtok() that is multithread-safe.
 632
 633    For the POSIX documentation for this function, see:
 634    http://www.opengroup.org/susv3xsh/strtok.html
 635
 636    Caveat: It modifies the original string.
 637    Caveat: These functions cannot be used on constant strings.
 638    Caveat: The identity of the delimiting character is lost.
 639    Caveat: It doesn't work with multibyte strings unless all of the delimiter
 640            characters are ASCII characters < 0x30.
 641
 642    See also strsep().  */
 643 #if @GNULIB_STRTOK_R@
 644 # if @REPLACE_STRTOK_R@
 645 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 646 #   undef strtok_r
 647 #   define strtok_r rpl_strtok_r
 648 #  endif
 649 _GL_FUNCDECL_RPL (strtok_r, char *,
 650                   (char *restrict s, char const *restrict delim,
 651                    char **restrict save_ptr)
 652                   _GL_ARG_NONNULL ((2, 3)));
 653 _GL_CXXALIAS_RPL (strtok_r, char *,
 654                   (char *restrict s, char const *restrict delim,
 655                    char **restrict save_ptr));
 656 # else
 657 #  if @UNDEFINE_STRTOK_R@ || defined GNULIB_POSIXCHECK
 658 #   undef strtok_r
 659 #  endif
 660 #  if ! @HAVE_DECL_STRTOK_R@
 661 _GL_FUNCDECL_SYS (strtok_r, char *,
 662                   (char *restrict s, char const *restrict delim,
 663                    char **restrict save_ptr)
 664                   _GL_ARG_NONNULL ((2, 3)));
 665 #  endif
 666 _GL_CXXALIAS_SYS (strtok_r, char *,
 667                   (char *restrict s, char const *restrict delim,
 668                    char **restrict save_ptr));
 669 # endif
 670 _GL_CXXALIASWARN (strtok_r);
 671 # if defined GNULIB_POSIXCHECK
 672 _GL_WARN_ON_USE (strtok_r, "strtok_r cannot work correctly on character "
 673                  "strings in multibyte locales - "
 674                  "use mbstok_r if you care about internationalization");
 675 # endif
 676 #elif defined GNULIB_POSIXCHECK
 677 # undef strtok_r
 678 # if HAVE_RAW_DECL_STRTOK_R
 679 _GL_WARN_ON_USE (strtok_r, "strtok_r is unportable - "
 680                  "use gnulib module strtok_r for portability");
 681 # endif
 682 #endif
 683
 684
 685 /* The following functions are not specified by POSIX.  They are gnulib
 686    extensions.  */
 687
 688 #if @GNULIB_MBSLEN@
 689 /* Return the number of multibyte characters in the character string STRING.
 690    This considers multibyte characters, unlike strlen, which counts bytes.  */
 691 # ifdef __MirBSD__  /* MirBSD defines mbslen as a macro.  Override it.  */
 692 #  undef mbslen
 693 # endif
 694 # if @HAVE_MBSLEN@  /* AIX, OSF/1, MirBSD define mbslen already in libc.  */
 695 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 696 #   define mbslen rpl_mbslen
 697 #  endif
 698 _GL_FUNCDECL_RPL (mbslen, size_t, (const char *string) _GL_ARG_NONNULL ((1)));
 699 _GL_CXXALIAS_RPL (mbslen, size_t, (const char *string));
 700 # else
 701 _GL_FUNCDECL_SYS (mbslen, size_t, (const char *string) _GL_ARG_NONNULL ((1)));
 702 _GL_CXXALIAS_SYS (mbslen, size_t, (const char *string));
 703 # endif
 704 _GL_CXXALIASWARN (mbslen);
 705 #endif
 706
 707 #if @GNULIB_MBSNLEN@
 708 /* Return the number of multibyte characters in the character string starting
 709    at STRING and ending at STRING + LEN.  */
 710 _GL_EXTERN_C size_t mbsnlen (const char *string, size_t len)
 711      _GL_ARG_NONNULL ((1));
 712 #endif
 713
 714 #if @GNULIB_MBSCHR@
 715 /* Locate the first single-byte character C in the character string STRING,
 716    and return a pointer to it.  Return NULL if C is not found in STRING.
 717    Unlike strchr(), this function works correctly in multibyte locales with
 718    encodings such as GB18030.  */
 719 # if defined __hpux
 720 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 721 #   define mbschr rpl_mbschr /* avoid collision with HP-UX function */
 722 #  endif
 723 _GL_FUNCDECL_RPL (mbschr, char *, (const char *string, int c)
 724                                   _GL_ARG_NONNULL ((1)));
 725 _GL_CXXALIAS_RPL (mbschr, char *, (const char *string, int c));
 726 # else
 727 _GL_FUNCDECL_SYS (mbschr, char *, (const char *string, int c)
 728                                   _GL_ARG_NONNULL ((1)));
 729 _GL_CXXALIAS_SYS (mbschr, char *, (const char *string, int c));
 730 # endif
 731 _GL_CXXALIASWARN (mbschr);
 732 #endif
 733
 734 #if @GNULIB_MBSRCHR@
 735 /* Locate the last single-byte character C in the character string STRING,
 736    and return a pointer to it.  Return NULL if C is not found in STRING.
 737    Unlike strrchr(), this function works correctly in multibyte locales with
 738    encodings such as GB18030.  */
 739 # if defined __hpux
 740 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 741 #   define mbsrchr rpl_mbsrchr /* avoid collision with HP-UX function */
 742 #  endif
 743 _GL_FUNCDECL_RPL (mbsrchr, char *, (const char *string, int c)
 744                                    _GL_ARG_NONNULL ((1)));
 745 _GL_CXXALIAS_RPL (mbsrchr, char *, (const char *string, int c));
 746 # else
 747 _GL_FUNCDECL_SYS (mbsrchr, char *, (const char *string, int c)
 748                                    _GL_ARG_NONNULL ((1)));
 749 _GL_CXXALIAS_SYS (mbsrchr, char *, (const char *string, int c));
 750 # endif
 751 _GL_CXXALIASWARN (mbsrchr);
 752 #endif
 753
 754 #if @GNULIB_MBSSTR@
 755 /* Find the first occurrence of the character string NEEDLE in the character
 756    string HAYSTACK.  Return NULL if NEEDLE is not found in HAYSTACK.
 757    Unlike strstr(), this function works correctly in multibyte locales with
 758    encodings different from UTF-8.  */
 759 _GL_EXTERN_C char * mbsstr (const char *haystack, const char *needle)
 760      _GL_ARG_NONNULL ((1, 2));
 761 #endif
 762
 763 #if @GNULIB_MBSCASECMP@
 764 /* Compare the character strings S1 and S2, ignoring case, returning less than,
 765    equal to or greater than zero if S1 is lexicographically less than, equal to
 766    or greater than S2.
 767    Note: This function may, in multibyte locales, return 0 for strings of
 768    different lengths!
 769    Unlike strcasecmp(), this function works correctly in multibyte locales.  */
 770 _GL_EXTERN_C int mbscasecmp (const char *s1, const char *s2)
 771      _GL_ARG_NONNULL ((1, 2));
 772 #endif
 773
 774 #if @GNULIB_MBSNCASECMP@
 775 /* Compare the initial segment of the character string S1 consisting of at most
 776    N characters with the initial segment of the character string S2 consisting
 777    of at most N characters, ignoring case, returning less than, equal to or
 778    greater than zero if the initial segment of S1 is lexicographically less
 779    than, equal to or greater than the initial segment of S2.
 780    Note: This function may, in multibyte locales, return 0 for initial segments
 781    of different lengths!
 782    Unlike strncasecmp(), this function works correctly in multibyte locales.
 783    But beware that N is not a byte count but a character count!  */
 784 _GL_EXTERN_C int mbsncasecmp (const char *s1, const char *s2, size_t n)
 785      _GL_ARG_NONNULL ((1, 2));
 786 #endif
 787
 788 #if @GNULIB_MBSPCASECMP@
 789 /* Compare the initial segment of the character string STRING consisting of
 790    at most mbslen (PREFIX) characters with the character string PREFIX,
 791    ignoring case.  If the two match, return a pointer to the first byte
 792    after this prefix in STRING.  Otherwise, return NULL.
 793    Note: This function may, in multibyte locales, return non-NULL if STRING
 794    is of smaller length than PREFIX!
 795    Unlike strncasecmp(), this function works correctly in multibyte
 796    locales.  */
 797 _GL_EXTERN_C char * mbspcasecmp (const char *string, const char *prefix)
 798      _GL_ARG_NONNULL ((1, 2));
 799 #endif
 800
 801 #if @GNULIB_MBSCASESTR@
 802 /* Find the first occurrence of the character string NEEDLE in the character
 803    string HAYSTACK, using case-insensitive comparison.
 804    Note: This function may, in multibyte locales, return success even if
 805    strlen (haystack) < strlen (needle) !
 806    Unlike strcasestr(), this function works correctly in multibyte locales.  */
 807 _GL_EXTERN_C char * mbscasestr (const char *haystack, const char *needle)
 808      _GL_ARG_NONNULL ((1, 2));
 809 #endif
 810
 811 #if @GNULIB_MBSCSPN@
 812 /* Find the first occurrence in the character string STRING of any character
 813    in the character string ACCEPT.  Return the number of bytes from the
 814    beginning of the string to this occurrence, or to the end of the string
 815    if none exists.
 816    Unlike strcspn(), this function works correctly in multibyte locales.  */
 817 _GL_EXTERN_C size_t mbscspn (const char *string, const char *accept)
 818      _GL_ARG_NONNULL ((1, 2));
 819 #endif
 820
 821 #if @GNULIB_MBSPBRK@
 822 /* Find the first occurrence in the character string STRING of any character
 823    in the character string ACCEPT.  Return the pointer to it, or NULL if none
 824    exists.
 825    Unlike strpbrk(), this function works correctly in multibyte locales.  */
 826 # if defined __hpux
 827 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 828 #   define mbspbrk rpl_mbspbrk /* avoid collision with HP-UX function */
 829 #  endif
 830 _GL_FUNCDECL_RPL (mbspbrk, char *, (const char *string, const char *accept)
 831                                    _GL_ARG_NONNULL ((1, 2)));
 832 _GL_CXXALIAS_RPL (mbspbrk, char *, (const char *string, const char *accept));
 833 # else
 834 _GL_FUNCDECL_SYS (mbspbrk, char *, (const char *string, const char *accept)
 835                                    _GL_ARG_NONNULL ((1, 2)));
 836 _GL_CXXALIAS_SYS (mbspbrk, char *, (const char *string, const char *accept));
 837 # endif
 838 _GL_CXXALIASWARN (mbspbrk);
 839 #endif
 840
 841 #if @GNULIB_MBSSPN@
 842 /* Find the first occurrence in the character string STRING of any character
 843    not in the character string REJECT.  Return the number of bytes from the
 844    beginning of the string to this occurrence, or to the end of the string
 845    if none exists.
 846    Unlike strspn(), this function works correctly in multibyte locales.  */
 847 _GL_EXTERN_C size_t mbsspn (const char *string, const char *reject)
 848      _GL_ARG_NONNULL ((1, 2));
 849 #endif
 850
 851 #if @GNULIB_MBSSEP@
 852 /* Search the next delimiter (multibyte character listed in the character
 853    string DELIM) starting at the character string *STRINGP.
 854    If one is found, overwrite it with a NUL, and advance *STRINGP to point
 855    to the next multibyte character after it.  Otherwise, set *STRINGP to NULL.
 856    If *STRINGP was already NULL, nothing happens.
 857    Return the old value of *STRINGP.
 858
 859    This is a variant of mbstok_r() that supports empty fields.
 860
 861    Caveat: It modifies the original string.
 862    Caveat: These functions cannot be used on constant strings.
 863    Caveat: The identity of the delimiting character is lost.
 864
 865    See also mbstok_r().  */
 866 _GL_EXTERN_C char * mbssep (char **stringp, const char *delim)
 867      _GL_ARG_NONNULL ((1, 2));
 868 #endif
 869
 870 #if @GNULIB_MBSTOK_R@
 871 /* Parse the character string STRING into tokens separated by characters in
 872    the character string DELIM.
 873    If STRING is NULL, the saved pointer in SAVE_PTR is used as
 874    the next starting point.  For example:
 875         char s[] = "-abc-=-def";
 876         char *sp;
 877         x = mbstok_r(s, "-", &sp);      // x = "abc", sp = "=-def"
 878         x = mbstok_r(NULL, "-=", &sp);  // x = "def", sp = NULL
 879         x = mbstok_r(NULL, "=", &sp);   // x = NULL
 880                 // s = "abc\0-def\0"
 881
 882    Caveat: It modifies the original string.
 883    Caveat: These functions cannot be used on constant strings.
 884    Caveat: The identity of the delimiting character is lost.
 885
 886    See also mbssep().  */
 887 _GL_EXTERN_C char * mbstok_r (char *string, const char *delim, char **save_ptr)
 888      _GL_ARG_NONNULL ((2, 3));
 889 #endif
 890
 891 /* Map any int, typically from errno, into an error message.  */
 892 #if @GNULIB_STRERROR@
 893 # if @REPLACE_STRERROR@
 894 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 895 #   undef strerror
 896 #   define strerror rpl_strerror
 897 #  endif
 898 _GL_FUNCDECL_RPL (strerror, char *, (int));
 899 _GL_CXXALIAS_RPL (strerror, char *, (int));
 900 # else
 901 _GL_CXXALIAS_SYS (strerror, char *, (int));
 902 # endif
 903 _GL_CXXALIASWARN (strerror);
 904 #elif defined GNULIB_POSIXCHECK
 905 # undef strerror
 906 /* Assume strerror is always declared.  */
 907 _GL_WARN_ON_USE (strerror, "strerror is unportable - "
 908                  "use gnulib module strerror to guarantee non-NULL result");
 909 #endif
 910
 911 /* Map any int, typically from errno, into an error message.  Multithread-safe.
 912    Uses the POSIX declaration, not the glibc declaration.  */
 913 #if @GNULIB_STRERROR_R@
 914 # if @REPLACE_STRERROR_R@
 915 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 916 #   undef strerror_r
 917 #   define strerror_r rpl_strerror_r
 918 #  endif
 919 _GL_FUNCDECL_RPL (strerror_r, int, (int errnum, char *buf, size_t buflen)
 920                                    _GL_ARG_NONNULL ((2)));
 921 _GL_CXXALIAS_RPL (strerror_r, int, (int errnum, char *buf, size_t buflen));
 922 # else
 923 #  if !@HAVE_DECL_STRERROR_R@
 924 _GL_FUNCDECL_SYS (strerror_r, int, (int errnum, char *buf, size_t buflen)
 925                                    _GL_ARG_NONNULL ((2)));
 926 #  endif
 927 _GL_CXXALIAS_SYS (strerror_r, int, (int errnum, char *buf, size_t buflen));
 928 # endif
 929 # if @HAVE_DECL_STRERROR_R@
 930 _GL_CXXALIASWARN (strerror_r);
 931 # endif
 932 #elif defined GNULIB_POSIXCHECK
 933 # undef strerror_r
 934 # if HAVE_RAW_DECL_STRERROR_R
 935 _GL_WARN_ON_USE (strerror_r, "strerror_r is unportable - "
 936                  "use gnulib module strerror_r-posix for portability");
 937 # endif
 938 #endif
 939
 940 #if @GNULIB_STRSIGNAL@
 941 # if @REPLACE_STRSIGNAL@
 942 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 943 #   define strsignal rpl_strsignal
 944 #  endif
 945 _GL_FUNCDECL_RPL (strsignal, char *, (int __sig));
 946 _GL_CXXALIAS_RPL (strsignal, char *, (int __sig));
 947 # else
 948 #  if ! @HAVE_DECL_STRSIGNAL@
 949 _GL_FUNCDECL_SYS (strsignal, char *, (int __sig));
 950 #  endif
 951 /* Need to cast, because on Cygwin 1.5.x systems, the return type is
 952    'const char *'.  */
 953 _GL_CXXALIAS_SYS_CAST (strsignal, char *, (int __sig));
 954 # endif
 955 _GL_CXXALIASWARN (strsignal);
 956 #elif defined GNULIB_POSIXCHECK
 957 # undef strsignal
 958 # if HAVE_RAW_DECL_STRSIGNAL
 959 _GL_WARN_ON_USE (strsignal, "strsignal is unportable - "
 960                  "use gnulib module strsignal for portability");
 961 # endif
 962 #endif
 963
 964 #if @GNULIB_STRVERSCMP@
 965 # if !@HAVE_STRVERSCMP@
 966 _GL_FUNCDECL_SYS (strverscmp, int, (const char *, const char *)
 967                                    _GL_ARG_NONNULL ((1, 2)));
 968 # endif
 969 _GL_CXXALIAS_SYS (strverscmp, int, (const char *, const char *));
 970 _GL_CXXALIASWARN (strverscmp);
 971 #elif defined GNULIB_POSIXCHECK
 972 # undef strverscmp
 973 # if HAVE_RAW_DECL_STRVERSCMP
 974 _GL_WARN_ON_USE (strverscmp, "strverscmp is unportable - "
 975                  "use gnulib module strverscmp for portability");
 976 # endif
 977 #endif
 978
 979
 980 #endif /* _GL_STRING_H */
 981 #endif /* _GL_STRING_H */