[thirdparty/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));

#ifdef __USE_GNU
/* Similar to `strstr' but this function ignores the case of both strings.  */
extern char *__strcasestr __P ((__const char *__haystack,
				__const char *__needle));
extern char *strcasestr __P ((__const char *__haystack,
			      __const char *__needle));
#endif

/* 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));

/* Copy N bytes of SRC to DEST, return pointer to bytes after the
   last written byte.  */
extern __ptr_t __mempcpy __P ((__ptr_t __restrict __dest,
			       __const __ptr_t __restrict __src, size_t __n));
extern __ptr_t mempcpy __P ((__ptr_t __restrict __dest,
			     __const __ptr_t __restrict __src, size_t __n));
#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

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

#if defined __USE_BSD || (defined __USE_XOPEN_EXTENDED \
			  && (_POSIX_C_SOURCE - 0) < 199506L)
/* 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));

/* 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));
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));
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


#if defined __GNUC__ && __GNUC__ >= 2 && defined __OPTIMIZE__
/* 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

__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	156	extern char strstr __P ((__const char __haystack, __const char *__needle));
f4017d20 UD	157
	158	#ifdef __USE_GNU
	159	/* Similar to `strstr' but this function ignores the case of both strings. */
	160	extern char __strcasestr __P ((__const char __haystack,
	161	__const char *__needle));
	162	extern char strcasestr __P ((__const char __haystack,
	163	__const char *__needle));
	164	#endif
	165
28f540f4	166	/* Divide S into tokens separated by characters in DELIM. */
2f6d1f1b UD	167	extern char strtok __P ((char __restrict __s,
2f6d1f1b UD	168	__const char *__restrict __delim));
28f540f4	169
19361cb7	170	#if defined __USE_POSIX \|\| defined __USE_MISC
59dd8641 RM	171	/* Divide S into tokens separated by characters in DELIM. Information
	172	passed between calls are stored in SAVE_PTR. */
	173	extern char strtok_r __P ((char __s, __const char *__delim,
	174	char **__save_ptr));
9d187dd4	175	#endif
59dd8641	176
9d187dd4	177	#ifdef __USE_GNU
6d52618b	178	/* Find the first occurrence of NEEDLE in HAYSTACK.
28f540f4 RM	179	NEEDLE is NEEDLELEN bytes long;
	180	HAYSTACK is HAYSTACKLEN bytes long. */
	181	extern __ptr_t memmem __P ((__const __ptr_t __haystack, size_t __haystacklen,
	182	__const __ptr_t __needle, size_t __needlelen));
9a0a462c UD	183
	184	/* Copy N bytes of SRC to DEST, return pointer to bytes after the
	185	last written byte. */
	186	extern __ptr_t __mempcpy __P ((__ptr_t __restrict __dest,
	187	__const __ptr_t __restrict __src, size_t __n));
	188	extern __ptr_t mempcpy __P ((__ptr_t __restrict __dest,
	189	__const __ptr_t __restrict __src, size_t __n));
28f540f4 RM	190	#endif
28f540f4 RM	191
8d71c7b0	192
28f540f4 RM	193	/* Return the length of S. */
	194	extern size_t strlen __P ((__const char *__s));
	195
8d71c7b0 RM	196	#ifdef __USE_GNU
	197	/* Find the length of STRING, but scan at most MAXLEN characters.
	198	If no '\0' terminator is found in that many characters, return MAXLEN. */
	199	extern size_t strnlen __P ((__const char *__string, size_t __maxlen));
8d71c7b0 RM	200	#endif
	201
	202
60478656	203	/* Return a string describing the meaning of the `errno' code in ERRNUM. */
28f540f4	204	extern char *strerror __P ((int __errnum));
19361cb7	205	#ifdef __USE_MISC
60478656 RM	206	/* Reentrant version of `strerror'. If a temporary buffer is required, at
60478656 RM	207	most BUFLEN bytes of BUF will be used. */
47707456	208	extern char __strerror_r __P ((int __errnum, char __buf, size_t __buflen));
9f447fb3	209	extern char strerror_r __P ((int __errnum, char __buf, size_t __buflen));
60478656	210	#endif
28f540f4	211
61eb22d3 UD	212	/* We define this function always since `bzero' is sometimes needed when
	213	the namespace rules does not allow this. */
	214	extern void __bzero __P ((__ptr_t __s, size_t __n));
	215
9756dfe1 UD	216	#if defined __USE_BSD \|\| (defined __USE_XOPEN_EXTENDED \
9756dfe1 UD	217	&& (_POSIX_C_SOURCE - 0) < 199506L)
28f540f4 RM	218	/* Copy N bytes of SRC to DEST (like memmove, but args reversed). */
	219	extern void bcopy __P ((__const __ptr_t __src, __ptr_t __dest, size_t __n));
	220
	221	/* Set N bytes of S to 0. */
	222	extern void bzero __P ((__ptr_t __s, size_t __n));
	223
	224	/* Compare N bytes of S1 and S2 (same as memcmp). */
	225	extern int bcmp __P ((__const __ptr_t __s1, __const __ptr_t __s2, size_t __n));
	226
2c6fe0bd UD	227	/* Find the first occurrence of C in S (same as strchr). */
	228	extern char index __P ((__const char __s, int __c));
	229
	230	/* Find the last occurrence of C in S (same as strrchr). */
	231	extern char rindex __P ((__const char __s, int __c));
	232
28f540f4 RM	233	/* Return the position of the first bit set in I, or 0 if none are set.
28f540f4 RM	234	The least-significant bit is position 1, the most-significant 32. */
19212f87	235	extern int __ffs __P ((int __i));
28f540f4 RM	236	extern int ffs __P ((int __i));
	237
	238	/* Compare S1 and S2, ignoring case. */
3ec41e03	239	extern int __strcasecmp __P ((__const char __s1, __const char __s2));
28f540f4 RM	240	extern int strcasecmp __P ((__const char __s1, __const char __s2));
28f540f4 RM	241
6e86a7c2	242	/* Compare no more than N chars of S1 and S2, ignoring case. */
bba7bb78 RM	243	extern int __strncasecmp __P ((__const char __s1, __const char __s2,
bba7bb78 RM	244	size_t __n));
6e86a7c2 RM	245	extern int strncasecmp __P ((__const char __s1, __const char __s2,
6e86a7c2 RM	246	size_t __n));
2c6fe0bd	247	#endif /* Use BSD or X/Open Unix. */
6e86a7c2	248
0501d603 UD	249	#ifdef __USE_GNU
	250	/* Again versions of a few functions which use the given locale instead
	251	of the global one. */
	252	extern int __strcasecmp_l __P ((__const char __s1, __const char __s2,
	253	__locale_t __loc));
	254
	255	extern int __strncasecmp_l __P ((__const char __s1, __const char __s2,
	256	size_t __n, __locale_t __loc));
	257	#endif
	258
2c6fe0bd	259	#ifdef __USE_BSD
28f540f4 RM	260	/* Return the next DELIM-delimited token from *STRINGP,
28f540f4 RM	261	terminating it with a '\0', and update STRINGP to point past it. /
d68171ed	262	extern char __strsep __P ((char __stringp, __const char __delim));
28f540f4 RM	263	extern char strsep __P ((char __stringp, __const char __delim));
	264	#endif
	265
28f540f4	266	#ifdef __USE_GNU
1f205a47	267	/* Compare S1 and S2 as strings holding name & indices/version numbers. */
cbdee279	268	extern int __strverscmp __P ((__const char __s1, __const char __s2));
1f205a47 UD	269	extern int strverscmp __P ((__const char __s1, __const char __s2));
1f205a47 UD	270
28f540f4 RM	271	/* Return a string describing the meaning of the signal number in SIG. */
	272	extern char *strsignal __P ((int __sig));
	273
	274	/* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */
3ec41e03	275	extern char __stpcpy __P ((char __dest, __const char *__src));
28f540f4 RM	276	extern char stpcpy __P ((char __dest, __const char *__src));
	277
	278	/* Copy no more than N characters of SRC to DEST, returning the address of
	279	the last character written into DEST. */
3ec41e03	280	extern char __stpncpy __P ((char __dest, __const char *__src, size_t __n));
28f540f4 RM	281	extern char stpncpy __P ((char __dest, __const char *__src, size_t __n));
28f540f4 RM	282
28f540f4 RM	283	/* Sautee STRING briskly. */
	284	extern char strfry __P ((char __string));
	285
	286	/* Frobnicate N bytes of S. */
	287	extern __ptr_t memfrob __P ((__ptr_t __s, size_t __n));
28f540f4	288
92f1da4d	289	# ifndef basename
dd33e89f UD	290	/* Return the file name within directory of FILENAME. We don't
	291	declare the function if the `basename' macro is available (defined
	292	in <libgen.h>) which makes the XPG version of this function
	293	available. */
036cc82f	294	extern char basename __P ((__const char __filename));
92f1da4d	295	# endif
84724245 RM	296	#endif
84724245 RM	297
55c14926	298
92f1da4d	299	#if defined __GNUC__ && __GNUC__ >= 2 && defined __OPTIMIZE__
9a0a462c UD	300	/* When using GNU CC we provide some optimized versions of selected
	301	functions from this header. There are two kinds of optimizations:
	302
61952351 UD	303	- machine-dependent optimizations, most probably using inline
	304	assembler code; these might be quite expensive since the code
	305	size can increase significantly.
9a0a462c UD	306	These optimizations are not used unless the symbol
9a0a462c UD	307	__USE_STRING_INLINES
61952351	308	is defined before including this header.
9a0a462c UD	309
	310	- machine-independent optimizations which do not increase the
	311	code size significantly and which optimize mainly situations
	312	where one or more arguments are compile-time constants.
	313	These optimizations are used always when the compiler is
61952351	314	taught to optimize.
9a0a462c	315
61eb22d3 UD	316	One can inhibit all optimizations by defining __NO_STRING_INLINES. */
	317
	318	/* Get the machine-dependent optimizations (if any). */
	319	# include <bits/string.h>
9a0a462c UD	320
	321	/* These are generic optimizations which do not add too much inline code. */
	322	# include <bits/string2.h>
92f1da4d UD	323	#endif
92f1da4d UD	324
28f540f4 RM	325	__END_DECLS
	326
	327	#endif /* string.h */