[glibc.git] / string / string.h

/* Copyright (C) 1991, 92, 93, 95, 96, 97 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 Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/*
 *	ISO C Standard: 4.11 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>


/* Copy N bytes of SRC to DEST.  */
extern __ptr_t memcpy __P ((__ptr_t __restrict __dest,
			    __const __ptr_t __restrict __src, size_t __n));
/* Copy N bytes of SRC to DEST, guaranteeing
   correct behavior for overlapping strings.  */
extern __ptr_t memmove __P ((__ptr_t __dest, __const __ptr_t __src,
			     size_t __n));

/* 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.  */
extern __ptr_t __memccpy __P ((__ptr_t __dest, __const __ptr_t __src,
			       int __c, size_t __n));
#if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN
extern __ptr_t memccpy __P ((__ptr_t __dest, __const __ptr_t __src,
			     int __c, size_t __n));
#endif /* SVID.  */


/* Set N bytes of S to C.  */
extern __ptr_t memset __P ((__ptr_t __s, int __c, size_t __n));

/* Compare N bytes of S1 and S2.  */
extern int memcmp __P ((__const __ptr_t __s1, __const __ptr_t __s2,
			size_t __n));

/* Search N bytes of S for C.  */
extern __ptr_t memchr __P ((__const __ptr_t __s, int __c, size_t __n));


/* Copy SRC to DEST.  */
extern char *strcpy __P ((char *__restrict __dest,
			  __const char *__restrict __src));
/* Copy no more than N characters of SRC to DEST.  */
extern char *strncpy __P ((char *__restrict __dest,
			   __const char *__restrict __src, size_t __n));

/* Append SRC onto DEST.  */
extern char *strcat __P ((char *__restrict __dest,
			  __const char *__restrict __src));
/* Append no more than N characters from SRC onto DEST.  */
extern char *strncat __P ((char *__restrict __dest,
			   __const char *__restrict __src, size_t __n));

/* Compare S1 and S2.  */
extern int strcmp __P ((__const char *__s1, __const char *__s2));
/* Compare N characters of S1 and S2.  */
extern int strncmp __P ((__const char *__s1, __const char *__s2, size_t __n));

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

#ifdef __USE_GNU
/* 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 __P ((__const char *__s1, __const char *__s2,
			     __locale_t __l));
/* Put a transformation of SRC into no more than N bytes of DEST.  */
extern size_t __strxfrm_l __P ((char *__dest, __const char *__src, size_t __n,
				__locale_t __l));
#endif

#if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
/* Duplicate S, returning an identical malloc'd string.  */
extern char *__strdup __P ((__const char *__s));
extern char *strdup __P ((__const char *__s));
#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].  */
extern char *__strndup __P ((__const char *__string, size_t __n));
#if defined __USE_GNU
extern char *strndup __P ((__const char *__string, size_t __n));
#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 = __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 = __builtin_alloca (__len + 1);			      \
      __new[__len] = '\0';						      \
      (char *) memcpy (__new, __old, __len);				      \
    }))
#endif

/* Find the first occurrence of C in S.  */
extern char *strchr __P ((__const char *__s, int __c));
/* Find the last occurrence of C in S.  */
extern char *strrchr __P ((__const char *__s, int __c));

/* Return the length of the initial segment of S which
   consists entirely of characters not in REJECT.  */
extern size_t strcspn __P ((__const char *__s, __const char *__reject));
/* Return the length of the initial segment of S which
   consists entirely of characters in ACCEPT.  */
extern size_t strspn __P ((__const char *__s, __const char *__accept));
/* Find the first occurrence in S of any character in ACCEPT.  */
extern char *strpbrk __P ((__const char *__s, __const char *__accept));
/* Find the first occurrence of NEEDLE in HAYSTACK.  */
extern char *strstr __P ((__const char *__haystack, __const char *__needle));
/* Divide S into tokens separated by characters in DELIM.  */
extern char *strtok __P ((char *__restrict __s,
			  __const char *__restrict __delim));

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

#ifdef __USE_GNU
/* Find the first occurrence of NEEDLE in HAYSTACK.
   NEEDLE is NEEDLELEN bytes long;
   HAYSTACK is HAYSTACKLEN bytes long.  */
extern __ptr_t memmem __P ((__const __ptr_t __haystack, size_t __haystacklen,
			    __const __ptr_t __needle, size_t __needlelen));
#endif


/* Return the length of S.  */
extern size_t strlen __P ((__const char *__s));

#ifdef	__USE_GNU
/* 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 __P ((__const char *__string, size_t __maxlen));
#endif


/* Return a string describing the meaning of the `errno' code in ERRNUM.  */
extern char *strerror __P ((int __errnum));
#ifdef	__USE_MISC
/* Reentrant version of `strerror'.  If a temporary buffer is required, at
   most BUFLEN bytes of BUF will be used.  */
extern char *__strerror_r __P ((int __errnum, char *__buf, size_t __buflen));
extern char *strerror_r __P ((int __errnum, char *__buf, size_t __buflen));
#endif

#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
/* Copy N bytes of SRC to DEST (like memmove, but args reversed).  */
extern void bcopy __P ((__const __ptr_t __src, __ptr_t __dest, size_t __n));

/* Set N bytes of S to 0.  */
extern void __bzero __P ((__ptr_t __s, size_t __n));
extern void bzero __P ((__ptr_t __s, size_t __n));

/* Compare N bytes of S1 and S2 (same as memcmp).  */
extern int bcmp __P ((__const __ptr_t __s1, __const __ptr_t __s2, size_t __n));

/* Find the first occurrence of C in S (same as strchr).  */
extern char *index __P ((__const char *__s, int __c));

/* Find the last occurrence of C in S (same as strrchr).  */
extern char *rindex __P ((__const char *__s, int __c));

/* 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 __P ((int __i));

/* Compare S1 and S2, ignoring case.  */
extern int __strcasecmp __P ((__const char *__s1, __const char *__s2));
extern int strcasecmp __P ((__const char *__s1, __const char *__s2));

/* Compare no more than N chars of S1 and S2, ignoring case.  */
extern int __strncasecmp __P ((__const char *__s1, __const char *__s2,
			       size_t __n));
extern int strncasecmp __P ((__const char *__s1, __const char *__s2,
			     size_t __n));
#endif /* Use BSD or X/Open Unix.  */

#ifdef	__USE_GNU
/* Again versions of a few functions which use the given locale instead
   of the global one.  */
extern int __strcasecmp_l __P ((__const char *__s1, __const char *__s2,
				__locale_t __loc));

extern int __strncasecmp_l __P ((__const char *__s1, __const char *__s2,
				 size_t __n, __locale_t __loc));
#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 __P ((char **__stringp, __const char *__delim));
extern char *strsep __P ((char **__stringp, __const char *__delim));
#endif

#ifdef	__USE_GNU
/* Compare S1 and S2 as strings holding name & indices/version numbers.  */
extern int strverscmp __P ((__const char *__s1, __const char *__s2));

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

/* Copy SRC to DEST, returning the address of the terminating '\0' in DEST.  */
extern char *__stpcpy __P ((char *__dest, __const char *__src));
extern char *stpcpy __P ((char *__dest, __const char *__src));

/* Copy no more than N characters of SRC to DEST, returning the address of
   the last character written into DEST.  */
extern char *__stpncpy __P ((char *__dest, __const char *__src, size_t __n));
extern char *stpncpy __P ((char *__dest, __const char *__src, size_t __n));

/* Sautee STRING briskly.  */
extern char *strfry __P ((char *__string));

/* Frobnicate N bytes of S.  */
extern __ptr_t memfrob __P ((__ptr_t __s, size_t __n));

# 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.  */
extern char *basename __P ((__const char *__filename));
# endif
#endif


/* Some functions might be implemented as optimized inline assembler
   functions.  Only include this file if we really want them.  */
#if defined __USE_STRING_INLINES && defined __OPTIMIZE__
# include <bits/string.h>
#endif


/* Now provide some generic optimizations.  */
#if defined __GNUC__ && __GNUC__ >= 2 && defined __OPTIMIZE__
extern __inline size_t
strnlen (__const char *__string, size_t __maxlen)
{
  __const char *__end = (__const char *) memchr (__string, '\0', __maxlen);
  return __end ? __end - __string : __maxlen;
}
#endif

__END_DECLS

#endif /* string.h  */
Commit	Line	Data
df4ef2ab	1	/* Copyright (C) 1991, 92, 93, 95, 96, 97 Free Software Foundation, Inc.
ba1ffaa1	2	This file is part of the GNU C Library.
28f540f4	3
ba1ffaa1 UD	4	The GNU C Library is free software; you can redistribute it and/or
	5	modify it under the terms of the GNU Library General Public License as
	6	published by the Free Software Foundation; either version 2 of the
	7	License, or (at your option) any later version.
28f540f4	8
ba1ffaa1 UD	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	Library General Public License for more details.
28f540f4	13
ba1ffaa1 UD	14	You should have received a copy of the GNU Library General Public
	15	License along with the GNU C Library; see the file COPYING.LIB. If not,
	16	write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	17	Boston, MA 02111-1307, USA. */
28f540f4 RM	18
28f540f4 RM	19	/*
ba1ffaa1	20	* ISO C Standard: 4.11 STRING HANDLING <string.h>
28f540f4 RM	21	*/
	22
	23	#ifndef _STRING_H
28f540f4	24	#define _STRING_H 1
5107cf1d	25
28f540f4 RM	26	#include <features.h>
	27
	28	__BEGIN_DECLS
	29
	30	/* Get size_t and NULL from <stddef.h>. */
	31	#define __need_size_t
	32	#define __need_NULL
	33	#include <stddef.h>
	34
	35
	36	/* Copy N bytes of SRC to DEST. */
2f6d1f1b UD	37	extern __ptr_t memcpy __P ((__ptr_t __restrict __dest,
2f6d1f1b UD	38	__const __ptr_t __restrict __src, size_t __n));
28f540f4 RM	39	/* Copy N bytes of SRC to DEST, guaranteeing
	40	correct behavior for overlapping strings. */
	41	extern __ptr_t memmove __P ((__ptr_t __dest, __const __ptr_t __src,
	42	size_t __n));
	43
	44	/* Copy no more than N bytes of SRC to DEST, stopping when C is found.
	45	Return the position in DEST one byte past where C was copied,
	46	or NULL if C was not found in the first N bytes of SRC. */
	47	extern __ptr_t __memccpy __P ((__ptr_t __dest, __const __ptr_t __src,
	48	int __c, size_t __n));
377a515b	49	#if defined __USE_SVID \|\| defined __USE_BSD \|\| defined __USE_XOPEN
28f540f4 RM	50	extern __ptr_t memccpy __P ((__ptr_t __dest, __const __ptr_t __src,
28f540f4 RM	51	int __c, size_t __n));
28f540f4 RM	52	#endif /* SVID. */
	53
	54
	55	/* Set N bytes of S to C. */
	56	extern __ptr_t memset __P ((__ptr_t __s, int __c, size_t __n));
	57
	58	/* Compare N bytes of S1 and S2. */
	59	extern int memcmp __P ((__const __ptr_t __s1, __const __ptr_t __s2,
	60	size_t __n));
	61
	62	/* Search N bytes of S for C. */
	63	extern __ptr_t memchr __P ((__const __ptr_t __s, int __c, size_t __n));
	64
	65
	66	/* Copy SRC to DEST. */
2f6d1f1b UD	67	extern char strcpy __P ((char __restrict __dest,
2f6d1f1b UD	68	__const char *__restrict __src));
28f540f4	69	/* Copy no more than N characters of SRC to DEST. */
2f6d1f1b UD	70	extern char strncpy __P ((char __restrict __dest,
2f6d1f1b UD	71	__const char *__restrict __src, size_t __n));
28f540f4 RM	72
28f540f4 RM	73	/* Append SRC onto DEST. */
2f6d1f1b UD	74	extern char strcat __P ((char __restrict __dest,
2f6d1f1b UD	75	__const char *__restrict __src));
28f540f4	76	/* Append no more than N characters from SRC onto DEST. */
2f6d1f1b UD	77	extern char strncat __P ((char __restrict __dest,
2f6d1f1b UD	78	__const char *__restrict __src, size_t __n));
28f540f4 RM	79
	80	/* Compare S1 and S2. */
	81	extern int strcmp __P ((__const char __s1, __const char __s2));
	82	/* Compare N characters of S1 and S2. */
	83	extern int strncmp __P ((__const char __s1, __const char __s2, size_t __n));
	84
	85	/* Compare the collated forms of S1 and S2. */
	86	extern int strcoll __P ((__const char __s1, __const char __s2));
	87	/* Put a transformation of SRC into no more than N bytes of DEST. */
2f6d1f1b UD	88	extern size_t strxfrm __P ((char *__restrict __dest,
2f6d1f1b UD	89	__const char *__restrict __src, size_t __n));
28f540f4	90
c84142e8 UD	91	#ifdef __USE_GNU
	92	/* The following functions are equivalent to the both above but they
	93	take the locale they use for the collation as an extra argument.
	94	This is not standardsized but something like will come. */
	95	# include <xlocale.h>
	96
	97	/* Compare the collated forms of S1 and S2 using rules from L. */
	98	extern int __strcoll_l __P ((__const char __s1, __const char __s2,
	99	__locale_t __l));
	100	/* Put a transformation of SRC into no more than N bytes of DEST. */
	101	extern size_t __strxfrm_l __P ((char __dest, __const char __src, size_t __n,
	102	__locale_t __l));
	103	#endif
	104
377a515b	105	#if defined __USE_SVID \|\| defined __USE_BSD \|\| defined __USE_XOPEN_EXTENDED
28f540f4	106	/* Duplicate S, returning an identical malloc'd string. */
6dbe2837	107	extern char __strdup __P ((__const char __s));
28f540f4 RM	108	extern char strdup __P ((__const char __s));
	109	#endif
	110
6dbe2837 RM	111	/* Return a malloc'd copy of at most N bytes of STRING. The
	112	resultant string is terminated even if no null terminator
	113	appears before STRING[N]. */
ce7a5ef4	114	extern char __strndup __P ((__const char __string, size_t __n));
377a515b	115	#if defined __USE_GNU
6dbe2837	116	extern char strndup __P ((__const char __string, size_t __n));
6d52618b	117	#endif
6dbe2837	118
377a515b	119	#if defined __USE_GNU && defined __GNUC__
036cc82f	120	/* Duplicate S, returning an identical alloca'd string. */
3996f34b	121	# define strdupa(s) \
036cc82f RM	122	(__extension__ \
	123	({ \
	124	__const char *__old = (s); \
	125	size_t __len = strlen (__old) + 1; \
	126	char *__new = __builtin_alloca (__len); \
3996f34b	127	(char *) memcpy (__new, __old, __len); \
036cc82f RM	128	}))
036cc82f RM	129
6dbe2837	130	/* Return an alloca'd copy of at most N bytes of string. */
3996f34b	131	# define strndupa(s, n) \
036cc82f RM	132	(__extension__ \
	133	({ \
	134	__const char *__old = (s); \
	135	size_t __len = strnlen (__old, (n)); \
	136	char *__new = __builtin_alloca (__len + 1); \
	137	__new[__len] = '\0'; \
3996f34b	138	(char *) memcpy (__new, __old, __len); \
036cc82f	139	}))
02ac66c5 RM	140	#endif
02ac66c5 RM	141
28f540f4 RM	142	/* Find the first occurrence of C in S. */
	143	extern char strchr __P ((__const char __s, int __c));
	144	/* Find the last occurrence of C in S. */
	145	extern char strrchr __P ((__const char __s, int __c));
	146
	147	/* Return the length of the initial segment of S which
	148	consists entirely of characters not in REJECT. */
	149	extern size_t strcspn __P ((__const char __s, __const char __reject));
	150	/* Return the length of the initial segment of S which
	151	consists entirely of characters in ACCEPT. */
	152	extern size_t strspn __P ((__const char __s, __const char __accept));
6d52618b	153	/* Find the first occurrence in S of any character in ACCEPT. */
28f540f4	154	extern char strpbrk __P ((__const char __s, __const char *__accept));
6d52618b	155	/* Find the first occurrence of NEEDLE in HAYSTACK. */
28f540f4 RM	156	extern char strstr __P ((__const char __haystack, __const char *__needle));
28f540f4 RM	157	/* Divide S into tokens separated by characters in DELIM. */
2f6d1f1b UD	158	extern char strtok __P ((char __restrict __s,
2f6d1f1b UD	159	__const char *__restrict __delim));
28f540f4	160
19361cb7	161	#if defined __USE_POSIX \|\| defined __USE_MISC
59dd8641 RM	162	/* Divide S into tokens separated by characters in DELIM. Information
	163	passed between calls are stored in SAVE_PTR. */
	164	extern char strtok_r __P ((char __s, __const char *__delim,
	165	char **__save_ptr));
9d187dd4	166	#endif
59dd8641	167
9d187dd4	168	#ifdef __USE_GNU
6d52618b	169	/* Find the first occurrence of NEEDLE in HAYSTACK.
28f540f4 RM	170	NEEDLE is NEEDLELEN bytes long;
	171	HAYSTACK is HAYSTACKLEN bytes long. */
	172	extern __ptr_t memmem __P ((__const __ptr_t __haystack, size_t __haystacklen,
	173	__const __ptr_t __needle, size_t __needlelen));
	174	#endif
	175
8d71c7b0	176
28f540f4 RM	177	/* Return the length of S. */
	178	extern size_t strlen __P ((__const char *__s));
	179
8d71c7b0 RM	180	#ifdef __USE_GNU
	181	/* Find the length of STRING, but scan at most MAXLEN characters.
	182	If no '\0' terminator is found in that many characters, return MAXLEN. */
	183	extern size_t strnlen __P ((__const char *__string, size_t __maxlen));
8d71c7b0 RM	184	#endif
	185
	186
60478656	187	/* Return a string describing the meaning of the `errno' code in ERRNUM. */
28f540f4	188	extern char *strerror __P ((int __errnum));
19361cb7	189	#ifdef __USE_MISC
60478656 RM	190	/* Reentrant version of `strerror'. If a temporary buffer is required, at
60478656 RM	191	most BUFLEN bytes of BUF will be used. */
47707456	192	extern char __strerror_r __P ((int __errnum, char __buf, size_t __buflen));
9f447fb3	193	extern char strerror_r __P ((int __errnum, char __buf, size_t __buflen));
60478656	194	#endif
28f540f4	195
377a515b	196	#if defined __USE_BSD \|\| defined __USE_XOPEN_EXTENDED
28f540f4 RM	197	/* Copy N bytes of SRC to DEST (like memmove, but args reversed). */
	198	extern void bcopy __P ((__const __ptr_t __src, __ptr_t __dest, size_t __n));
	199
	200	/* Set N bytes of S to 0. */
3996f34b	201	extern void __bzero __P ((__ptr_t __s, size_t __n));
28f540f4 RM	202	extern void bzero __P ((__ptr_t __s, size_t __n));
	203
	204	/* Compare N bytes of S1 and S2 (same as memcmp). */
	205	extern int bcmp __P ((__const __ptr_t __s1, __const __ptr_t __s2, size_t __n));
	206
2c6fe0bd UD	207	/* Find the first occurrence of C in S (same as strchr). */
	208	extern char index __P ((__const char __s, int __c));
	209
	210	/* Find the last occurrence of C in S (same as strrchr). */
	211	extern char rindex __P ((__const char __s, int __c));
	212
28f540f4 RM	213	/* Return the position of the first bit set in I, or 0 if none are set.
	214	The least-significant bit is position 1, the most-significant 32. */
	215	extern int ffs __P ((int __i));
	216
	217	/* Compare S1 and S2, ignoring case. */
3ec41e03	218	extern int __strcasecmp __P ((__const char __s1, __const char __s2));
28f540f4 RM	219	extern int strcasecmp __P ((__const char __s1, __const char __s2));
28f540f4 RM	220
6e86a7c2	221	/* Compare no more than N chars of S1 and S2, ignoring case. */
bba7bb78 RM	222	extern int __strncasecmp __P ((__const char __s1, __const char __s2,
bba7bb78 RM	223	size_t __n));
6e86a7c2 RM	224	extern int strncasecmp __P ((__const char __s1, __const char __s2,
6e86a7c2 RM	225	size_t __n));
2c6fe0bd	226	#endif /* Use BSD or X/Open Unix. */
6e86a7c2	227
0501d603 UD	228	#ifdef __USE_GNU
	229	/* Again versions of a few functions which use the given locale instead
	230	of the global one. */
	231	extern int __strcasecmp_l __P ((__const char __s1, __const char __s2,
	232	__locale_t __loc));
	233
	234	extern int __strncasecmp_l __P ((__const char __s1, __const char __s2,
	235	size_t __n, __locale_t __loc));
	236	#endif
	237
2c6fe0bd	238	#ifdef __USE_BSD
28f540f4 RM	239	/* Return the next DELIM-delimited token from *STRINGP,
28f540f4 RM	240	terminating it with a '\0', and update STRINGP to point past it. /
d68171ed	241	extern char __strsep __P ((char __stringp, __const char __delim));
28f540f4 RM	242	extern char strsep __P ((char __stringp, __const char __delim));
	243	#endif
	244
28f540f4	245	#ifdef __USE_GNU
1f205a47 UD	246	/* Compare S1 and S2 as strings holding name & indices/version numbers. */
	247	extern int strverscmp __P ((__const char __s1, __const char __s2));
	248
28f540f4 RM	249	/* Return a string describing the meaning of the signal number in SIG. */
	250	extern char *strsignal __P ((int __sig));
	251
	252	/* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */
3ec41e03	253	extern char __stpcpy __P ((char __dest, __const char *__src));
28f540f4 RM	254	extern char stpcpy __P ((char __dest, __const char *__src));
	255
	256	/* Copy no more than N characters of SRC to DEST, returning the address of
	257	the last character written into DEST. */
3ec41e03	258	extern char __stpncpy __P ((char __dest, __const char *__src, size_t __n));
28f540f4 RM	259	extern char stpncpy __P ((char __dest, __const char *__src, size_t __n));
28f540f4 RM	260
28f540f4 RM	261	/* Sautee STRING briskly. */
	262	extern char strfry __P ((char __string));
	263
	264	/* Frobnicate N bytes of S. */
	265	extern __ptr_t memfrob __P ((__ptr_t __s, size_t __n));
28f540f4	266
92f1da4d	267	# ifndef basename
dd33e89f UD	268	/* Return the file name within directory of FILENAME. We don't
	269	declare the function if the `basename' macro is available (defined
	270	in <libgen.h>) which makes the XPG version of this function
	271	available. */
036cc82f	272	extern char basename __P ((__const char __filename));
92f1da4d	273	# endif
84724245 RM	274	#endif
84724245 RM	275
55c14926 UD	276
55c14926 UD	277	/* Some functions might be implemented as optimized inline assembler
92f1da4d UD	278	functions. Only include this file if we really want them. */
92f1da4d UD	279	#if defined __USE_STRING_INLINES && defined __OPTIMIZE__
55c14926 UD	280	# include <bits/string.h>
	281	#endif
	282
92f1da4d UD	283
	284	/* Now provide some generic optimizations. */
	285	#if defined __GNUC__ && __GNUC__ >= 2 && defined __OPTIMIZE__
	286	extern __inline size_t
	287	strnlen (__const char *__string, size_t __maxlen)
	288	{
	289	__const char __end = (__const char ) memchr (__string, '\0', __maxlen);
	290	return __end ? __end - __string : __maxlen;
	291	}
	292	#endif
	293
28f540f4 RM	294	__END_DECLS
	295
	296	#endif /* string.h */