reference, declarationdefinition
definition → references, declarations, derived classes, virtual overrides
reference to multiple definitions → definitions
unreferenced
    1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93
   94
   95
   96
   97
   98
   99
  100
  101
  102
  103
  104
  105
  106
  107
  108
  109
  110
  111
  112
  113
  114
  115
  116
  117
  118
  119
  120
  121
  122
  123
  124
  125
  126
  127
  128
  129
  130
  131
  132
  133
  134
  135
  136
  137
  138
  139
  140
  141
  142
  143
  144
  145
  146
  147
  148
  149
  150
  151
  152
  153
  154
  155
  156
  157
  158
  159
  160
  161
  162
  163
  164
  165
  166
  167
  168
  169
  170
  171
  172
  173
  174
  175
  176
  177
  178
  179
  180
  181
  182
  183
  184
  185
  186
  187
  188
  189
  190
  191
  192
  193
  194
  195
  196
  197
  198
  199
  200
  201
  202
  203
  204
  205
  206
  207
  208
  209
  210
  211
  212
  213
  214
  215
  216
  217
  218
  219
  220
  221
  222
  223
  224
  225
  226
  227
  228
  229
  230
  231
  232
  233
  234
  235
  236
  237
  238
  239
  240
  241
  242
  243
  244
  245
  246
  247
  248
  249
  250
  251
  252
  253
  254
  255
  256
  257
  258
  259
  260
  261
  262
  263
  264
  265
  266
  267
  268
  269
  270
  271
  272
  273
  274
  275
  276
  277
  278
  279
  280
  281
  282
  283
  284
  285
  286
  287
  288
  289
  290
  291
  292
  293
  294
  295
  296
  297
  298
  299
  300
  301
  302
  303
  304
  305
  306
  307
  308
  309
  310
  311
  312
  313
  314
  315
  316
  317
  318
  319
  320
  321
  322
  323
  324
  325
  326
  327
  328
  329
  330
  331
  332
  333
  334
  335
  336
  337
  338
  339
  340
  341
  342
  343
  344
  345
  346
  347
  348
  349
  350
  351
  352
  353
  354
  355
  356
  357
  358
  359
  360
  361
  362
  363
  364
  365
  366
  367
  368
  369
  370
  371
  372
  373
  374
  375
  376
  377
  378
  379
  380
  381
  382
  383
  384
  385
  386
  387
  388
  389
  390
  391
  392
  393
  394
  395
  396
  397
  398
  399
  400
  401
  402
  403
  404
  405
  406
  407
  408
  409
  410
  411
  412
  413
  414
  415
  416
  417
  418
  419
  420
  421
  422
  423
  424
  425
  426
  427
  428
  429
  430
  431
  432
  433
  434
  435
  436
  437
  438
  439
  440
  441
  442
  443
  444
  445
  446
  447
  448
  449
  450
  451
  452
  453
  454
  455
  456
  457
  458
  459
  460
  461
  462
  463
  464
  465
  466
  467
  468
  469
  470
  471
  472
  473
  474
  475
  476
  477
  478
  479
  480
  481
  482
  483
  484
  485
  486
  487
  488
  489
  490
  491
  492
  493
  494
  495
  496
  497
  498
  499
  500
  501
  502
  503
  504
  505
  506
  507
  508
  509
  510
  511
  512
  513
  514
  515
  516
  517
  518
  519
  520
  521
  522
  523
  524
  525
  526
  527
  528
  529
  530
  531
  532
  533
  534
  535
  536
  537
  538
  539
  540
  541
  542
  543
  544
  545
  546
  547
  548
  549
  550
  551
  552
  553
  554
  555
  556
  557
  558
  559
  560
  561
  562
  563
  564
  565
  566
  567
  568
  569
  570
  571
  572
  573
  574
  575
  576
  577
  578
  579
  580
  581
  582
  583
  584
  585
  586
  587
  588
  589
  590
  591
  592
  593
  594
  595
  596
  597
  598
  599
  600
  601
  602
  603
  604
  605
  606
  607
  608
  609
  610
  611
  612
  613
  614
  615
  616
  617
  618
  619
  620
  621
  622
  623
  624
  625
  626
  627
  628
  629
  630
  631
  632
  633
  634
  635
  636
  637
  638
  639
  640
  641
  642
  643
  644
  645
  646
/* Copyright (C) 1991-2014 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

/*
 *	ISO C99 Standard: 7.21 String handling	<string.h>
 */

#ifndef	_STRING_H
#define	_STRING_H	1

#include <features.h>

__BEGIN_DECLS

/* Get size_t and NULL from <stddef.h>.  */
#define	__need_size_t
#define	__need_NULL
#include <stddef.h>

/* Provide correct C++ prototypes, and indicate this to the caller.  This
   requires a compatible C++ standard library.  As a heuristic, we provide
   these when the compiler indicates full conformance with C++98 or later,
   and for older GCC versions that are known to provide a compatible
   libstdc++.  */
#if defined __cplusplus && (__cplusplus >= 199711L || __GNUC_PREREQ (4, 4))
# define __CORRECT_ISO_CPP_STRING_H_PROTO
#endif


__BEGIN_NAMESPACE_STD
/* Copy N bytes of SRC to DEST.  */
extern void *memcpy (void *__restrict __dest, const void *__restrict __src,
		     size_t __n) __THROW __nonnull ((1, 2));
/* Copy N bytes of SRC to DEST, guaranteeing
   correct behavior for overlapping strings.  */
extern void *memmove (void *__dest, const void *__src, size_t __n)
     __THROW __nonnull ((1, 2));
__END_NAMESPACE_STD

/* Copy no more than N bytes of SRC to DEST, stopping when C is found.
   Return the position in DEST one byte past where C was copied,
   or NULL if C was not found in the first N bytes of SRC.  */
#if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN
extern void *memccpy (void *__restrict __dest, const void *__restrict __src,
		      int __c, size_t __n)
     __THROW __nonnull ((1, 2));
#endif /* SVID.  */


__BEGIN_NAMESPACE_STD
/* Set N bytes of S to C.  */
extern void *memset (void *__s, int __c, size_t __n) __THROW __nonnull ((1));

/* Compare N bytes of S1 and S2.  */
extern int memcmp (const void *__s1, const void *__s2, size_t __n)
     __THROW __attribute_pure__ __nonnull ((1, 2));

/* Search N bytes of S for C.  */
#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
extern "C++"
{
extern void *memchr (void *__s, int __c, size_t __n)
      __THROW __asm ("memchr") __attribute_pure__ __nonnull ((1));
extern const void *memchr (const void *__s, int __c, size_t __n)
      __THROW __asm ("memchr") __attribute_pure__ __nonnull ((1));

# ifdef __OPTIMIZE__
__extern_always_inline void *
memchr (void *__s, int __c, size_t __n) __THROW
{
  return __builtin_memchr (__s, __c, __n);
}

__extern_always_inline const void *
memchr (const void *__s, int __c, size_t __n) __THROW
{
  return __builtin_memchr (__s, __c, __n);
}
# endif
}
#else
extern void *memchr (const void *__s, int __c, size_t __n)
      __THROW __attribute_pure__ __nonnull ((1));
#endif
__END_NAMESPACE_STD

#ifdef __USE_GNU
/* Search in S for C.  This is similar to `memchr' but there is no
   length limit.  */
# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
extern "C++" void *rawmemchr (void *__s, int __c)
     __THROW __asm ("rawmemchr") __attribute_pure__ __nonnull ((1));
extern "C++" const void *rawmemchr (const void *__s, int __c)
     __THROW __asm ("rawmemchr") __attribute_pure__ __nonnull ((1));
# else
extern void *rawmemchr (const void *__s, int __c)
     __THROW __attribute_pure__ __nonnull ((1));
# endif

/* Search N bytes of S for the final occurrence of C.  */
# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
extern "C++" void *memrchr (void *__s, int __c, size_t __n)
      __THROW __asm ("memrchr") __attribute_pure__ __nonnull ((1));
extern "C++" const void *memrchr (const void *__s, int __c, size_t __n)
      __THROW __asm ("memrchr") __attribute_pure__ __nonnull ((1));
# else
extern void *memrchr (const void *__s, int __c, size_t __n)
      __THROW __attribute_pure__ __nonnull ((1));
# endif
#endif


__BEGIN_NAMESPACE_STD
/* Copy SRC to DEST.  */
extern char *strcpy (char *__restrict __dest, const char *__restrict __src)
     __THROW __nonnull ((1, 2));
/* Copy no more than N characters of SRC to DEST.  */
extern char *strncpy (char *__restrict __dest,
		      const char *__restrict __src, size_t __n)
     __THROW __nonnull ((1, 2));

/* Append SRC onto DEST.  */
extern char *strcat (char *__restrict __dest, const char *__restrict __src)
     __THROW __nonnull ((1, 2));
/* Append no more than N characters from SRC onto DEST.  */
extern char *strncat (char *__restrict __dest, const char *__restrict __src,
		      size_t __n) __THROW __nonnull ((1, 2));

/* Compare S1 and S2.  */
extern int strcmp (const char *__s1, const char *__s2)
     __THROW __attribute_pure__ __nonnull ((1, 2));
/* Compare N characters of S1 and S2.  */
extern int strncmp (const char *__s1, const char *__s2, size_t __n)
     __THROW __attribute_pure__ __nonnull ((1, 2));

/* Compare the collated forms of S1 and S2.  */
extern int strcoll (const char *__s1, const char *__s2)
     __THROW __attribute_pure__ __nonnull ((1, 2));
/* Put a transformation of SRC into no more than N bytes of DEST.  */
extern size_t strxfrm (char *__restrict __dest,
		       const char *__restrict __src, size_t __n)
     __THROW __nonnull ((2));
__END_NAMESPACE_STD

#ifdef __USE_XOPEN2K8
/* The following functions are equivalent to the both above but they
   take the locale they use for the collation as an extra argument.
   This is not standardsized but something like will come.  */
# include <xlocale.h>

/* Compare the collated forms of S1 and S2 using rules from L.  */
extern int strcoll_l (const char *__s1, const char *__s2, __locale_t __l)
     __THROW __attribute_pure__ __nonnull ((1, 2, 3));
/* Put a transformation of SRC into no more than N bytes of DEST.  */
extern size_t strxfrm_l (char *__dest, const char *__src, size_t __n,
			 __locale_t __l) __THROW __nonnull ((2, 4));
#endif

#if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED \
    || defined __USE_XOPEN2K8
/* Duplicate S, returning an identical malloc'd string.  */
extern char *strdup (const char *__s)
     __THROW __attribute_malloc__ __nonnull ((1));
#endif

/* Return a malloc'd copy of at most N bytes of STRING.  The
   resultant string is terminated even if no null terminator
   appears before STRING[N].  */
#if defined __USE_XOPEN2K8
extern char *strndup (const char *__string, size_t __n)
     __THROW __attribute_malloc__ __nonnull ((1));
#endif

#if defined __USE_GNU && defined __GNUC__
/* Duplicate S, returning an identical alloca'd string.  */
# define strdupa(s)							      \
  (__extension__							      \
    ({									      \
      const char *__old = (s);						      \
      size_t __len = strlen (__old) + 1;				      \
      char *__new = (char *) __builtin_alloca (__len);			      \
      (char *) memcpy (__new, __old, __len);				      \
    }))

/* Return an alloca'd copy of at most N bytes of string.  */
# define strndupa(s, n)							      \
  (__extension__							      \
    ({									      \
      const char *__old = (s);						      \
      size_t __len = strnlen (__old, (n));				      \
      char *__new = (char *) __builtin_alloca (__len + 1);		      \
      __new[__len] = '\0';						      \
      (char *) memcpy (__new, __old, __len);				      \
    }))
#endif

__BEGIN_NAMESPACE_STD
/* Find the first occurrence of C in S.  */
#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
extern "C++"
{
extern char *strchr (char *__s, int __c)
     __THROW __asm ("strchr") __attribute_pure__ __nonnull ((1));
extern const char *strchr (const char *__s, int __c)
     __THROW __asm ("strchr") __attribute_pure__ __nonnull ((1));

# ifdef __OPTIMIZE__
__extern_always_inline char *
strchr (char *__s, int __c) __THROW
{
  return __builtin_strchr (__s, __c);
}

__extern_always_inline const char *
strchr (const char *__s, int __c) __THROW
{
  return __builtin_strchr (__s, __c);
}
# endif
}
#else
extern char *strchr (const char *__s, int __c)
     __THROW __attribute_pure__ __nonnull ((1));
#endif
/* Find the last occurrence of C in S.  */
#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
extern "C++"
{
extern char *strrchr (char *__s, int __c)
     __THROW __asm ("strrchr") __attribute_pure__ __nonnull ((1));
extern const char *strrchr (const char *__s, int __c)
     __THROW __asm ("strrchr") __attribute_pure__ __nonnull ((1));

# ifdef __OPTIMIZE__
__extern_always_inline char *
strrchr (char *__s, int __c) __THROW
{
  return __builtin_strrchr (__s, __c);
}

__extern_always_inline const char *
strrchr (const char *__s, int __c) __THROW
{
  return __builtin_strrchr (__s, __c);
}
# endif
}
#else
extern char *strrchr (const char *__s, int __c)
     __THROW __attribute_pure__ __nonnull ((1));
#endif
__END_NAMESPACE_STD

#ifdef __USE_GNU
/* This function is similar to `strchr'.  But it returns a pointer to
   the closing NUL byte in case C is not found in S.  */
# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
extern "C++" char *strchrnul (char *__s, int __c)
     __THROW __asm ("strchrnul") __attribute_pure__ __nonnull ((1));
extern "C++" const char *strchrnul (const char *__s, int __c)
     __THROW __asm ("strchrnul") __attribute_pure__ __nonnull ((1));
# else
extern char *strchrnul (const char *__s, int __c)
     __THROW __attribute_pure__ __nonnull ((1));
# endif
#endif

__BEGIN_NAMESPACE_STD
/* Return the length of the initial segment of S which
   consists entirely of characters not in REJECT.  */
extern size_t strcspn (const char *__s, const char *__reject)
     __THROW __attribute_pure__ __nonnull ((1, 2));
/* Return the length of the initial segment of S which
   consists entirely of characters in ACCEPT.  */
extern size_t strspn (const char *__s, const char *__accept)
     __THROW __attribute_pure__ __nonnull ((1, 2));
/* Find the first occurrence in S of any character in ACCEPT.  */
#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
extern "C++"
{
extern char *strpbrk (char *__s, const char *__accept)
     __THROW __asm ("strpbrk") __attribute_pure__ __nonnull ((1, 2));
extern const char *strpbrk (const char *__s, const char *__accept)
     __THROW __asm ("strpbrk") __attribute_pure__ __nonnull ((1, 2));

# ifdef __OPTIMIZE__
__extern_always_inline char *
strpbrk (char *__s, const char *__accept) __THROW
{
  return __builtin_strpbrk (__s, __accept);
}

__extern_always_inline const char *
strpbrk (const char *__s, const char *__accept) __THROW
{
  return __builtin_strpbrk (__s, __accept);
}
# endif
}
#else
extern char *strpbrk (const char *__s, const char *__accept)
     __THROW __attribute_pure__ __nonnull ((1, 2));
#endif
/* Find the first occurrence of NEEDLE in HAYSTACK.  */
#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
extern "C++"
{
extern char *strstr (char *__haystack, const char *__needle)
     __THROW __asm ("strstr") __attribute_pure__ __nonnull ((1, 2));
extern const char *strstr (const char *__haystack, const char *__needle)
     __THROW __asm ("strstr") __attribute_pure__ __nonnull ((1, 2));

# ifdef __OPTIMIZE__
__extern_always_inline char *
strstr (char *__haystack, const char *__needle) __THROW
{
  return __builtin_strstr (__haystack, __needle);
}

__extern_always_inline const char *
strstr (const char *__haystack, const char *__needle) __THROW
{
  return __builtin_strstr (__haystack, __needle);
}
# endif
}
#else
extern char *strstr (const char *__haystack, const char *__needle)
     __THROW __attribute_pure__ __nonnull ((1, 2));
#endif


/* Divide S into tokens separated by characters in DELIM.  */
extern char *strtok (char *__restrict __s, const char *__restrict __delim)
     __THROW __nonnull ((2));
__END_NAMESPACE_STD

/* Divide S into tokens separated by characters in DELIM.  Information
   passed between calls are stored in SAVE_PTR.  */
extern char *__strtok_r (char *__restrict __s,
			 const char *__restrict __delim,
			 char **__restrict __save_ptr)
     __THROW __nonnull ((2, 3));
#if defined __USE_POSIX || defined __USE_MISC
extern char *strtok_r (char *__restrict __s, const char *__restrict __delim,
		       char **__restrict __save_ptr)
     __THROW __nonnull ((2, 3));
#endif

#ifdef __USE_GNU
/* Similar to `strstr' but this function ignores the case of both strings.  */
# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
extern "C++" char *strcasestr (char *__haystack, const char *__needle)
     __THROW __asm ("strcasestr") __attribute_pure__ __nonnull ((1, 2));
extern "C++" const char *strcasestr (const char *__haystack,
				     const char *__needle)
     __THROW __asm ("strcasestr") __attribute_pure__ __nonnull ((1, 2));
# else
extern char *strcasestr (const char *__haystack, const char *__needle)
     __THROW __attribute_pure__ __nonnull ((1, 2));
# endif
#endif

#ifdef __USE_GNU
/* Find the first occurrence of NEEDLE in HAYSTACK.
   NEEDLE is NEEDLELEN bytes long;
   HAYSTACK is HAYSTACKLEN bytes long.  */
extern void *memmem (const void *__haystack, size_t __haystacklen,
		     const void *__needle, size_t __needlelen)
     __THROW __attribute_pure__ __nonnull ((1, 3));

/* Copy N bytes of SRC to DEST, return pointer to bytes after the
   last written byte.  */
extern void *__mempcpy (void *__restrict __dest,
			const void *__restrict __src, size_t __n)
     __THROW __nonnull ((1, 2));
extern void *mempcpy (void *__restrict __dest,
		      const void *__restrict __src, size_t __n)
     __THROW __nonnull ((1, 2));
#endif


__BEGIN_NAMESPACE_STD
/* Return the length of S.  */
extern size_t strlen (const char *__s)
     __THROW __attribute_pure__ __nonnull ((1));
__END_NAMESPACE_STD

#ifdef	__USE_XOPEN2K8
/* Find the length of STRING, but scan at most MAXLEN characters.
   If no '\0' terminator is found in that many characters, return MAXLEN.  */
extern size_t strnlen (const char *__string, size_t __maxlen)
     __THROW __attribute_pure__ __nonnull ((1));
#endif


__BEGIN_NAMESPACE_STD
/* Return a string describing the meaning of the `errno' code in ERRNUM.  */
extern char *strerror (int __errnum) __THROW;
__END_NAMESPACE_STD
#if defined __USE_XOPEN2K || defined __USE_MISC
/* Reentrant version of `strerror'.
   There are 2 flavors of `strerror_r', GNU which returns the string
   and may or may not use the supplied temporary buffer and POSIX one
   which fills the string into the buffer.
   To use the POSIX version, -D_XOPEN_SOURCE=600 or -D_POSIX_C_SOURCE=200112L
   without -D_GNU_SOURCE is needed, otherwise the GNU version is
   preferred.  */
# if defined __USE_XOPEN2K && !defined __USE_GNU
/* Fill BUF with a string describing the meaning of the `errno' code in
   ERRNUM.  */
#  ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (strerror_r,
			   (int __errnum, char *__buf, size_t __buflen),
			   __xpg_strerror_r) __nonnull ((2));
#  else
extern int __xpg_strerror_r (int __errnum, char *__buf, size_t __buflen)
     __THROW __nonnull ((2));
#   define strerror_r __xpg_strerror_r
#  endif
# else
/* If a temporary buffer is required, at most BUFLEN bytes of BUF will be
   used.  */
extern char *strerror_r (int __errnum, char *__buf, size_t __buflen)
     __THROW __nonnull ((2)) __wur;
# endif
#endif

#ifdef __USE_XOPEN2K8
/* Translate error number to string according to the locale L.  */
extern char *strerror_l (int __errnum, __locale_t __l) __THROW;
#endif


/* We define this function always since `bzero' is sometimes needed when
   the namespace rules does not allow this.  */
extern void __bzero (void *__s, size_t __n) __THROW __nonnull ((1));

#ifdef __USE_BSD
/* Copy N bytes of SRC to DEST (like memmove, but args reversed).  */
extern void bcopy (const void *__src, void *__dest, size_t __n)
     __THROW __nonnull ((1, 2));

/* Set N bytes of S to 0.  */
extern void bzero (void *__s, size_t __n) __THROW __nonnull ((1));

/* Compare N bytes of S1 and S2 (same as memcmp).  */
extern int bcmp (const void *__s1, const void *__s2, size_t __n)
     __THROW __attribute_pure__ __nonnull ((1, 2));

/* Find the first occurrence of C in S (same as strchr).  */
# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
extern "C++"
{
extern char *index (char *__s, int __c)
     __THROW __asm ("index") __attribute_pure__ __nonnull ((1));
extern const char *index (const char *__s, int __c)
     __THROW __asm ("index") __attribute_pure__ __nonnull ((1));

#  if defined __OPTIMIZE__ && !defined __CORRECT_ISO_CPP_STRINGS_H_PROTO
__extern_always_inline char *
index (char *__s, int __c) __THROW
{
  return __builtin_index (__s, __c);
}

__extern_always_inline const char *
index (const char *__s, int __c) __THROW
{
  return __builtin_index (__s, __c);
}
#  endif
}
# else
extern char *index (const char *__s, int __c)
     __THROW __attribute_pure__ __nonnull ((1));
# endif

/* Find the last occurrence of C in S (same as strrchr).  */
# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
extern "C++"
{
extern char *rindex (char *__s, int __c)
     __THROW __asm ("rindex") __attribute_pure__ __nonnull ((1));
extern const char *rindex (const char *__s, int __c)
     __THROW __asm ("rindex") __attribute_pure__ __nonnull ((1));

#  if defined __OPTIMIZE__ && !defined __CORRECT_ISO_CPP_STRINGS_H_PROTO
__extern_always_inline char *
rindex (char *__s, int __c) __THROW
{
  return __builtin_rindex (__s, __c);
}

__extern_always_inline const char *
rindex (const char *__s, int __c) __THROW
{
  return __builtin_rindex (__s, __c);
}
#endif
}
# else
extern char *rindex (const char *__s, int __c)
     __THROW __attribute_pure__ __nonnull ((1));
# endif

/* Return the position of the first bit set in I, or 0 if none are set.
   The least-significant bit is position 1, the most-significant 32.  */
extern int ffs (int __i) __THROW __attribute__ ((__const__));

/* The following two functions are non-standard but necessary for non-32 bit
   platforms.  */
# ifdef	__USE_GNU
extern int ffsl (long int __l) __THROW __attribute__ ((__const__));
__extension__ extern int ffsll (long long int __ll)
     __THROW __attribute__ ((__const__));
# endif

/* Compare S1 and S2, ignoring case.  */
extern int strcasecmp (const char *__s1, const char *__s2)
     __THROW __attribute_pure__ __nonnull ((1, 2));

/* Compare no more than N chars of S1 and S2, ignoring case.  */
extern int strncasecmp (const char *__s1, const char *__s2, size_t __n)
     __THROW __attribute_pure__ __nonnull ((1, 2));
#endif /* Use BSD.  */

#ifdef	__USE_GNU
/* Again versions of a few functions which use the given locale instead
   of the global one.  */
extern int strcasecmp_l (const char *__s1, const char *__s2,
			 __locale_t __loc)
     __THROW __attribute_pure__ __nonnull ((1, 2, 3));

extern int strncasecmp_l (const char *__s1, const char *__s2,
			  size_t __n, __locale_t __loc)
     __THROW __attribute_pure__ __nonnull ((1, 2, 4));
#endif

#ifdef	__USE_BSD
/* Return the next DELIM-delimited token from *STRINGP,
   terminating it with a '\0', and update *STRINGP to point past it.  */
extern char *strsep (char **__restrict __stringp,
		     const char *__restrict __delim)
     __THROW __nonnull ((1, 2));
#endif

#ifdef	__USE_XOPEN2K8
/* Return a string describing the meaning of the signal number in SIG.  */
extern char *strsignal (int __sig) __THROW;

/* Copy SRC to DEST, returning the address of the terminating '\0' in DEST.  */
extern char *__stpcpy (char *__restrict __dest, const char *__restrict __src)
     __THROW __nonnull ((1, 2));
extern char *stpcpy (char *__restrict __dest, const char *__restrict __src)
     __THROW __nonnull ((1, 2));

/* Copy no more than N characters of SRC to DEST, returning the address of
   the last character written into DEST.  */
extern char *__stpncpy (char *__restrict __dest,
			const char *__restrict __src, size_t __n)
     __THROW __nonnull ((1, 2));
extern char *stpncpy (char *__restrict __dest,
		      const char *__restrict __src, size_t __n)
     __THROW __nonnull ((1, 2));
#endif

#ifdef	__USE_GNU
/* Compare S1 and S2 as strings holding name & indices/version numbers.  */
extern int strverscmp (const char *__s1, const char *__s2)
     __THROW __attribute_pure__ __nonnull ((1, 2));

/* Sautee STRING briskly.  */
extern char *strfry (char *__string) __THROW __nonnull ((1));

/* Frobnicate N bytes of S.  */
extern void *memfrob (void *__s, size_t __n) __THROW __nonnull ((1));

# ifndef basename
/* Return the file name within directory of FILENAME.  We don't
   declare the function if the `basename' macro is available (defined
   in <libgen.h>) which makes the XPG version of this function
   available.  */
#  ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
extern "C++" char *basename (char *__filename)
     __THROW __asm ("basename") __nonnull ((1));
extern "C++" const char *basename (const char *__filename)
     __THROW __asm ("basename") __nonnull ((1));
#  else
extern char *basename (const char *__filename) __THROW __nonnull ((1));
#  endif
# endif
#endif


#if defined __GNUC__ && __GNUC__ >= 2
# if defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__ \
     && !defined __NO_INLINE__ && !defined __cplusplus
/* When using GNU CC we provide some optimized versions of selected
   functions from this header.  There are two kinds of optimizations:

   - machine-dependent optimizations, most probably using inline
     assembler code; these might be quite expensive since the code
     size can increase significantly.
     These optimizations are not used unless the symbol
	__USE_STRING_INLINES
     is defined before including this header.

   - machine-independent optimizations which do not increase the
     code size significantly and which optimize mainly situations
     where one or more arguments are compile-time constants.
     These optimizations are used always when the compiler is
     taught to optimize.

   One can inhibit all optimizations by defining __NO_STRING_INLINES.  */

/* Get the machine-dependent optimizations (if any).  */
#  include <bits/string.h>

/* These are generic optimizations which do not add too much inline code.  */
#  include <bits/string2.h>
# endif

# if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
/* Functions with security checks.  */
#  include <bits/string3.h>
# endif
#endif

__END_DECLS

#endif /* string.h  */