gl/string.in.h

   1 /* A GNU-like <string.h>.
   2
   3    Copyright (C) 1995-1996, 2001-2008 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, 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 /* The include_next requires a split double-inclusion guard.  */
  22 #@INCLUDE_NEXT@ @NEXT_STRING_H@
  23
  24 #ifndef _GL_STRING_H
  25 #define _GL_STRING_H
  26
  27
  28 #ifndef __attribute__
  29 /* This feature is available in gcc versions 2.5 and later.  */
  30 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
  31 #  define __attribute__(Spec) /* empty */
  32 # endif
  33 /* The attribute __pure__ was added in gcc 2.96.  */
  34 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
  35 #  define __pure__ /* empty */
  36 # endif
  37 #endif
  38
  39
  40 /* The definition of GL_LINK_WARNING is copied here.  */
  41
  42
  43 #ifdef __cplusplus
  44 extern "C" {
  45 #endif
  46
  47
  48 /* Return the first occurrence of NEEDLE in HAYSTACK.  */
  49 #if @GNULIB_MEMMEM@
  50 # if @REPLACE_MEMMEM@
  51 #  define memmem rpl_memmem
  52 # endif
  53 # if ! @HAVE_DECL_MEMMEM@ || @REPLACE_MEMMEM@
  54 extern void *memmem (void const *__haystack, size_t __haystack_len,
  55                      void const *__needle, size_t __needle_len)
  56   __attribute__ ((__pure__));
  57 # endif
  58 #elif defined GNULIB_POSIXCHECK
  59 # undef memmem
  60 # define memmem(a,al,b,bl) \
  61     (GL_LINK_WARNING ("memmem is unportable and often quadratic - " \
  62                       "use gnulib module memmem-simple for portability, " \
  63                       "and module memmem for speed" ), \
  64      memmem (a, al, b, bl))
  65 #endif
  66
  67 /* Copy N bytes of SRC to DEST, return pointer to bytes after the
  68    last written byte.  */
  69 #if @GNULIB_MEMPCPY@
  70 # if ! @HAVE_MEMPCPY@
  71 extern void *mempcpy (void *restrict __dest, void const *restrict __src,
  72                       size_t __n);
  73 # endif
  74 #elif defined GNULIB_POSIXCHECK
  75 # undef mempcpy
  76 # define mempcpy(a,b,n) \
  77     (GL_LINK_WARNING ("mempcpy is unportable - " \
  78                       "use gnulib module mempcpy for portability"), \
  79      mempcpy (a, b, n))
  80 #endif
  81
  82 /* Search backwards through a block for a byte (specified as an int).  */
  83 #if @GNULIB_MEMRCHR@
  84 # if ! @HAVE_DECL_MEMRCHR@
  85 extern void *memrchr (void const *, int, size_t)
  86   __attribute__ ((__pure__));
  87 # endif
  88 #elif defined GNULIB_POSIXCHECK
  89 # undef memrchr
  90 # define memrchr(a,b,c) \
  91     (GL_LINK_WARNING ("memrchr is unportable - " \
  92                       "use gnulib module memrchr for portability"), \
  93      memrchr (a, b, c))
  94 #endif
  95
  96 /* Copy SRC to DST, returning the address of the terminating '\0' in DST.  */
  97 #if @GNULIB_STPCPY@
  98 # if ! @HAVE_STPCPY@
  99 extern char *stpcpy (char *restrict __dst, char const *restrict __src);
 100 # endif
 101 #elif defined GNULIB_POSIXCHECK
 102 # undef stpcpy
 103 # define stpcpy(a,b) \
 104     (GL_LINK_WARNING ("stpcpy is unportable - " \
 105                       "use gnulib module stpcpy for portability"), \
 106      stpcpy (a, b))
 107 #endif
 108
 109 /* Copy no more than N bytes of SRC to DST, returning a pointer past the
 110    last non-NUL byte written into DST.  */
 111 #if @GNULIB_STPNCPY@
 112 # if ! @HAVE_STPNCPY@
 113 #  define stpncpy gnu_stpncpy
 114 extern char *stpncpy (char *restrict __dst, char const *restrict __src,
 115                       size_t __n);
 116 # endif
 117 #elif defined GNULIB_POSIXCHECK
 118 # undef stpncpy
 119 # define stpncpy(a,b,n) \
 120     (GL_LINK_WARNING ("stpncpy is unportable - " \
 121                       "use gnulib module stpncpy for portability"), \
 122      stpncpy (a, b, n))
 123 #endif
 124
 125 #if defined GNULIB_POSIXCHECK
 126 /* strchr() does not work with multibyte strings if the locale encoding is
 127    GB18030 and the character to be searched is a digit.  */
 128 # undef strchr
 129 # define strchr(s,c) \
 130     (GL_LINK_WARNING ("strchr cannot work correctly on character strings " \
 131                       "in some multibyte locales - " \
 132                       "use mbschr if you care about internationalization"), \
 133      strchr (s, c))
 134 #endif
 135
 136 /* Find the first occurrence of C in S or the final NUL byte.  */
 137 #if @GNULIB_STRCHRNUL@
 138 # if ! @HAVE_STRCHRNUL@
 139 extern char *strchrnul (char const *__s, int __c_in)
 140   __attribute__ ((__pure__));
 141 # endif
 142 #elif defined GNULIB_POSIXCHECK
 143 # undef strchrnul
 144 # define strchrnul(a,b) \
 145     (GL_LINK_WARNING ("strchrnul is unportable - " \
 146                       "use gnulib module strchrnul for portability"), \
 147      strchrnul (a, b))
 148 #endif
 149
 150 /* Duplicate S, returning an identical malloc'd string.  */
 151 #if @GNULIB_STRDUP@
 152 # if ! @HAVE_DECL_STRDUP@ && ! defined strdup
 153 extern char *strdup (char const *__s);
 154 # endif
 155 #elif defined GNULIB_POSIXCHECK
 156 # undef strdup
 157 # define strdup(a) \
 158     (GL_LINK_WARNING ("strdup is unportable - " \
 159                       "use gnulib module strdup for portability"), \
 160      strdup (a))
 161 #endif
 162
 163 /* Return a newly allocated copy of at most N bytes of STRING.  */
 164 #if @GNULIB_STRNDUP@
 165 # if ! @HAVE_STRNDUP@
 166 #  undef strndup
 167 #  define strndup rpl_strndup
 168 # endif
 169 # if ! @HAVE_STRNDUP@ || ! @HAVE_DECL_STRNDUP@
 170 extern char *strndup (char const *__string, size_t __n);
 171 # endif
 172 #elif defined GNULIB_POSIXCHECK
 173 # undef strndup
 174 # define strndup(a,n) \
 175     (GL_LINK_WARNING ("strndup is unportable - " \
 176                       "use gnulib module strndup for portability"), \
 177      strndup (a, n))
 178 #endif
 179
 180 /* Find the length (number of bytes) of STRING, but scan at most
 181    MAXLEN bytes.  If no '\0' terminator is found in that many bytes,
 182    return MAXLEN.  */
 183 #if @GNULIB_STRNLEN@
 184 # if ! @HAVE_DECL_STRNLEN@
 185 extern size_t strnlen (char const *__string, size_t __maxlen)
 186   __attribute__ ((__pure__));
 187 # endif
 188 #elif defined GNULIB_POSIXCHECK
 189 # undef strnlen
 190 # define strnlen(a,n) \
 191     (GL_LINK_WARNING ("strnlen is unportable - " \
 192                       "use gnulib module strnlen for portability"), \
 193      strnlen (a, n))
 194 #endif
 195
 196 #if defined GNULIB_POSIXCHECK
 197 /* strcspn() assumes the second argument is a list of single-byte characters.
 198    Even in this simple case, it does not work with multibyte strings if the
 199    locale encoding is GB18030 and one of the characters to be searched is a
 200    digit.  */
 201 # undef strcspn
 202 # define strcspn(s,a) \
 203     (GL_LINK_WARNING ("strcspn cannot work correctly on character strings " \
 204                       "in multibyte locales - " \
 205                       "use mbscspn if you care about internationalization"), \
 206      strcspn (s, a))
 207 #endif
 208
 209 /* Find the first occurrence in S of any character in ACCEPT.  */
 210 #if @GNULIB_STRPBRK@
 211 # if ! @HAVE_STRPBRK@
 212 extern char *strpbrk (char const *__s, char const *__accept)
 213   __attribute__ ((__pure__));
 214 # endif
 215 # if defined GNULIB_POSIXCHECK
 216 /* strpbrk() assumes the second argument is a list of single-byte characters.
 217    Even in this simple case, it does not work with multibyte strings if the
 218    locale encoding is GB18030 and one of the characters to be searched is a
 219    digit.  */
 220 #  undef strpbrk
 221 #  define strpbrk(s,a) \
 222      (GL_LINK_WARNING ("strpbrk cannot work correctly on character strings " \
 223                        "in multibyte locales - " \
 224                        "use mbspbrk if you care about internationalization"), \
 225       strpbrk (s, a))
 226 # endif
 227 #elif defined GNULIB_POSIXCHECK
 228 # undef strpbrk
 229 # define strpbrk(s,a) \
 230     (GL_LINK_WARNING ("strpbrk is unportable - " \
 231                       "use gnulib module strpbrk for portability"), \
 232      strpbrk (s, a))
 233 #endif
 234
 235 #if defined GNULIB_POSIXCHECK
 236 /* strspn() assumes the second argument is a list of single-byte characters.
 237    Even in this simple case, it cannot work with multibyte strings.  */
 238 # undef strspn
 239 # define strspn(s,a) \
 240     (GL_LINK_WARNING ("strspn cannot work correctly on character strings " \
 241                       "in multibyte locales - " \
 242                       "use mbsspn if you care about internationalization"), \
 243      strspn (s, a))
 244 #endif
 245
 246 #if defined GNULIB_POSIXCHECK
 247 /* strrchr() does not work with multibyte strings if the locale encoding is
 248    GB18030 and the character to be searched is a digit.  */
 249 # undef strrchr
 250 # define strrchr(s,c) \
 251     (GL_LINK_WARNING ("strrchr cannot work correctly on character strings " \
 252                       "in some multibyte locales - " \
 253                       "use mbsrchr if you care about internationalization"), \
 254      strrchr (s, c))
 255 #endif
 256
 257 /* Search the next delimiter (char listed in DELIM) starting at *STRINGP.
 258    If one is found, overwrite it with a NUL, and advance *STRINGP
 259    to point to the next char after it.  Otherwise, set *STRINGP to NULL.
 260    If *STRINGP was already NULL, nothing happens.
 261    Return the old value of *STRINGP.
 262
 263    This is a variant of strtok() that is multithread-safe and supports
 264    empty fields.
 265
 266    Caveat: It modifies the original string.
 267    Caveat: These functions cannot be used on constant strings.
 268    Caveat: The identity of the delimiting character is lost.
 269    Caveat: It doesn't work with multibyte strings unless all of the delimiter
 270            characters are ASCII characters < 0x30.
 271
 272    See also strtok_r().  */
 273 #if @GNULIB_STRSEP@
 274 # if ! @HAVE_STRSEP@
 275 extern char *strsep (char **restrict __stringp, char const *restrict __delim);
 276 # endif
 277 # if defined GNULIB_POSIXCHECK
 278 #  undef strsep
 279 #  define strsep(s,d) \
 280      (GL_LINK_WARNING ("strsep cannot work correctly on character strings " \
 281                        "in multibyte locales - " \
 282                        "use mbssep if you care about internationalization"), \
 283       strsep (s, d))
 284 # endif
 285 #elif defined GNULIB_POSIXCHECK
 286 # undef strsep
 287 # define strsep(s,d) \
 288     (GL_LINK_WARNING ("strsep is unportable - " \
 289                       "use gnulib module strsep for portability"), \
 290      strsep (s, d))
 291 #endif
 292
 293 #if @GNULIB_STRSTR@
 294 # if @REPLACE_STRSTR@
 295 #  define strstr rpl_strstr
 296 char *strstr (const char *haystack, const char *needle)
 297   __attribute__ ((__pure__));
 298 # endif
 299 #elif defined GNULIB_POSIXCHECK
 300 /* strstr() does not work with multibyte strings if the locale encoding is
 301    different from UTF-8:
 302    POSIX says that it operates on "strings", and "string" in POSIX is defined
 303    as a sequence of bytes, not of characters.  */
 304 # undef strstr
 305 # define strstr(a,b) \
 306     (GL_LINK_WARNING ("strstr is quadratic on many systems, and cannot " \
 307                       "work correctly on character strings in most "    \
 308                       "multibyte locales - " \
 309                       "use mbsstr if you care about internationalization, " \
 310                       "or use strstr if you care about speed"), \
 311      strstr (a, b))
 312 #endif
 313
 314 /* Find the first occurrence of NEEDLE in HAYSTACK, using case-insensitive
 315    comparison.  */
 316 #if @GNULIB_STRCASESTR@
 317 # if @REPLACE_STRCASESTR@
 318 #  define strcasestr rpl_strcasestr
 319 # endif
 320 # if ! @HAVE_STRCASESTR@ || @REPLACE_STRCASESTR@
 321 extern char *strcasestr (const char *haystack, const char *needle)
 322   __attribute__ ((__pure__));
 323 # endif
 324 #elif defined GNULIB_POSIXCHECK
 325 /* strcasestr() does not work with multibyte strings:
 326    It is a glibc extension, and glibc implements it only for unibyte
 327    locales.  */
 328 # undef strcasestr
 329 # define strcasestr(a,b) \
 330     (GL_LINK_WARNING ("strcasestr does work correctly on character strings " \
 331                       "in multibyte locales - " \
 332                       "use mbscasestr if you care about " \
 333                       "internationalization, or use c-strcasestr if you want " \
 334                       "a locale independent function"), \
 335      strcasestr (a, b))
 336 #endif
 337
 338 /* Parse S into tokens separated by characters in DELIM.
 339    If S is NULL, the saved pointer in SAVE_PTR is used as
 340    the next starting point.  For example:
 341         char s[] = "-abc-=-def";
 342         char *sp;
 343         x = strtok_r(s, "-", &sp);      // x = "abc", sp = "=-def"
 344         x = strtok_r(NULL, "-=", &sp);  // x = "def", sp = NULL
 345         x = strtok_r(NULL, "=", &sp);   // x = NULL
 346                 // s = "abc\0-def\0"
 347
 348    This is a variant of strtok() that is multithread-safe.
 349
 350    For the POSIX documentation for this function, see:
 351    http://www.opengroup.org/susv3xsh/strtok.html
 352
 353    Caveat: It modifies the original string.
 354    Caveat: These functions cannot be used on constant strings.
 355    Caveat: The identity of the delimiting character is lost.
 356    Caveat: It doesn't work with multibyte strings unless all of the delimiter
 357            characters are ASCII characters < 0x30.
 358
 359    See also strsep().  */
 360 #if @GNULIB_STRTOK_R@
 361 # if ! @HAVE_DECL_STRTOK_R@
 362 extern char *strtok_r (char *restrict s, char const *restrict delim,
 363                        char **restrict save_ptr);
 364 # endif
 365 # if defined GNULIB_POSIXCHECK
 366 #  undef strtok_r
 367 #  define strtok_r(s,d,p) \
 368      (GL_LINK_WARNING ("strtok_r cannot work correctly on character strings " \
 369                        "in multibyte locales - " \
 370                        "use mbstok_r if you care about internationalization"), \
 371       strtok_r (s, d, p))
 372 # endif
 373 #elif defined GNULIB_POSIXCHECK
 374 # undef strtok_r
 375 # define strtok_r(s,d,p) \
 376     (GL_LINK_WARNING ("strtok_r is unportable - " \
 377                       "use gnulib module strtok_r for portability"), \
 378      strtok_r (s, d, p))
 379 #endif
 380
 381
 382 /* The following functions are not specified by POSIX.  They are gnulib
 383    extensions.  */
 384
 385 #if @GNULIB_MBSLEN@
 386 /* Return the number of multibyte characters in the character string STRING.
 387    This considers multibyte characters, unlike strlen, which counts bytes.  */
 388 extern size_t mbslen (const char *string);
 389 #endif
 390
 391 #if @GNULIB_MBSNLEN@
 392 /* Return the number of multibyte characters in the character string starting
 393    at STRING and ending at STRING + LEN.  */
 394 extern size_t mbsnlen (const char *string, size_t len);
 395 #endif
 396
 397 #if @GNULIB_MBSCHR@
 398 /* Locate the first single-byte character C in the character string STRING,
 399    and return a pointer to it.  Return NULL if C is not found in STRING.
 400    Unlike strchr(), this function works correctly in multibyte locales with
 401    encodings such as GB18030.  */
 402 # define mbschr rpl_mbschr /* avoid collision with HP-UX function */
 403 extern char * mbschr (const char *string, int c);
 404 #endif
 405
 406 #if @GNULIB_MBSRCHR@
 407 /* Locate the last single-byte character C in the character string STRING,
 408    and return a pointer to it.  Return NULL if C is not found in STRING.
 409    Unlike strrchr(), this function works correctly in multibyte locales with
 410    encodings such as GB18030.  */
 411 # define mbsrchr rpl_mbsrchr /* avoid collision with HP-UX function */
 412 extern char * mbsrchr (const char *string, int c);
 413 #endif
 414
 415 #if @GNULIB_MBSSTR@
 416 /* Find the first occurrence of the character string NEEDLE in the character
 417    string HAYSTACK.  Return NULL if NEEDLE is not found in HAYSTACK.
 418    Unlike strstr(), this function works correctly in multibyte locales with
 419    encodings different from UTF-8.  */
 420 extern char * mbsstr (const char *haystack, const char *needle);
 421 #endif
 422
 423 #if @GNULIB_MBSCASECMP@
 424 /* Compare the character strings S1 and S2, ignoring case, returning less than,
 425    equal to or greater than zero if S1 is lexicographically less than, equal to
 426    or greater than S2.
 427    Note: This function may, in multibyte locales, return 0 for strings of
 428    different lengths!
 429    Unlike strcasecmp(), this function works correctly in multibyte locales.  */
 430 extern int mbscasecmp (const char *s1, const char *s2);
 431 #endif
 432
 433 #if @GNULIB_MBSNCASECMP@
 434 /* Compare the initial segment of the character string S1 consisting of at most
 435    N characters with the initial segment of the character string S2 consisting
 436    of at most N characters, ignoring case, returning less than, equal to or
 437    greater than zero if the initial segment of S1 is lexicographically less
 438    than, equal to or greater than the initial segment of S2.
 439    Note: This function may, in multibyte locales, return 0 for initial segments
 440    of different lengths!
 441    Unlike strncasecmp(), this function works correctly in multibyte locales.
 442    But beware that N is not a byte count but a character count!  */
 443 extern int mbsncasecmp (const char *s1, const char *s2, size_t n);
 444 #endif
 445
 446 #if @GNULIB_MBSPCASECMP@
 447 /* Compare the initial segment of the character string STRING consisting of
 448    at most mbslen (PREFIX) characters with the character string PREFIX,
 449    ignoring case, returning less than, equal to or greater than zero if this
 450    initial segment is lexicographically less than, equal to or greater than
 451    PREFIX.
 452    Note: This function may, in multibyte locales, return 0 if STRING is of
 453    smaller length than PREFIX!
 454    Unlike strncasecmp(), this function works correctly in multibyte
 455    locales.  */
 456 extern char * mbspcasecmp (const char *string, const char *prefix);
 457 #endif
 458
 459 #if @GNULIB_MBSCASESTR@
 460 /* Find the first occurrence of the character string NEEDLE in the character
 461    string HAYSTACK, using case-insensitive comparison.
 462    Note: This function may, in multibyte locales, return success even if
 463    strlen (haystack) < strlen (needle) !
 464    Unlike strcasestr(), this function works correctly in multibyte locales.  */
 465 extern char * mbscasestr (const char *haystack, const char *needle);
 466 #endif
 467
 468 #if @GNULIB_MBSCSPN@
 469 /* Find the first occurrence in the character string STRING of any character
 470    in the character string ACCEPT.  Return the number of bytes from the
 471    beginning of the string to this occurrence, or to the end of the string
 472    if none exists.
 473    Unlike strcspn(), this function works correctly in multibyte locales.  */
 474 extern size_t mbscspn (const char *string, const char *accept);
 475 #endif
 476
 477 #if @GNULIB_MBSPBRK@
 478 /* Find the first occurrence in the character string STRING of any character
 479    in the character string ACCEPT.  Return the pointer to it, or NULL if none
 480    exists.
 481    Unlike strpbrk(), this function works correctly in multibyte locales.  */
 482 # define mbspbrk rpl_mbspbrk /* avoid collision with HP-UX function */
 483 extern char * mbspbrk (const char *string, const char *accept);
 484 #endif
 485
 486 #if @GNULIB_MBSSPN@
 487 /* Find the first occurrence in the character string STRING of any character
 488    not in the character string REJECT.  Return the number of bytes from the
 489    beginning of the string to this occurrence, or to the end of the string
 490    if none exists.
 491    Unlike strspn(), this function works correctly in multibyte locales.  */
 492 extern size_t mbsspn (const char *string, const char *reject);
 493 #endif
 494
 495 #if @GNULIB_MBSSEP@
 496 /* Search the next delimiter (multibyte character listed in the character
 497    string DELIM) starting at the character string *STRINGP.
 498    If one is found, overwrite it with a NUL, and advance *STRINGP to point
 499    to the next multibyte character after it.  Otherwise, set *STRINGP to NULL.
 500    If *STRINGP was already NULL, nothing happens.
 501    Return the old value of *STRINGP.
 502
 503    This is a variant of mbstok_r() that supports empty fields.
 504
 505    Caveat: It modifies the original string.
 506    Caveat: These functions cannot be used on constant strings.
 507    Caveat: The identity of the delimiting character is lost.
 508
 509    See also mbstok_r().  */
 510 extern char * mbssep (char **stringp, const char *delim);
 511 #endif
 512
 513 #if @GNULIB_MBSTOK_R@
 514 /* Parse the character string STRING into tokens separated by characters in
 515    the character string DELIM.
 516    If STRING is NULL, the saved pointer in SAVE_PTR is used as
 517    the next starting point.  For example:
 518         char s[] = "-abc-=-def";
 519         char *sp;
 520         x = mbstok_r(s, "-", &sp);      // x = "abc", sp = "=-def"
 521         x = mbstok_r(NULL, "-=", &sp);  // x = "def", sp = NULL
 522         x = mbstok_r(NULL, "=", &sp);   // x = NULL
 523                 // s = "abc\0-def\0"
 524
 525    Caveat: It modifies the original string.
 526    Caveat: These functions cannot be used on constant strings.
 527    Caveat: The identity of the delimiting character is lost.
 528
 529    See also mbssep().  */
 530 extern char * mbstok_r (char *string, const char *delim, char **save_ptr);
 531 #endif
 532
 533 /* Map any int, typically from errno, into an error message.  */
 534 #if @GNULIB_STRERROR@
 535 # if @REPLACE_STRERROR@
 536 #  undef strerror
 537 #  define strerror rpl_strerror
 538 extern char *strerror (int);
 539 # endif
 540 #elif defined GNULIB_POSIXCHECK
 541 # undef strerror
 542 # define strerror(e) \
 543     (GL_LINK_WARNING ("strerror is unportable - " \
 544                       "use gnulib module strerror to guarantee non-NULL result"), \
 545      strerror (e))
 546 #endif
 547
 548 #if @GNULIB_STRSIGNAL@
 549 # if @REPLACE_STRSIGNAL@
 550 #  define strsignal rpl_strsignal
 551 # endif
 552 # if ! @HAVE_DECL_STRSIGNAL@ || @REPLACE_STRSIGNAL@
 553 extern char *strsignal (int __sig);
 554 # endif
 555 #elif defined GNULIB_POSIXCHECK
 556 # undef strsignal
 557 # define strsignal(a) \
 558     (GL_LINK_WARNING ("strsignal is unportable - " \
 559                       "use gnulib module strsignal for portability"), \
 560      strsignal (a))
 561 #endif
 562
 563
 564 #ifdef __cplusplus
 565 }
 566 #endif
 567
 568 #endif /* _GL_STRING_H */
 569 #endif /* _GL_STRING_H */