1/* Copyright (C) 1991,92,96,97,99,2000,2001,2009 Free Software Foundation, Inc.
2   This file is part of the GNU C Library.
3
4   The GNU C Library is free software; you can redistribute it and/or
5   modify it under the terms of the GNU Lesser General Public
6   License as published by the Free Software Foundation; either
7   version 2.1 of the License, or (at your option) any later version.
8
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   Lesser General Public License for more details.
13
14   You should have received a copy of the GNU Lesser General Public
15   License along with the GNU C Library; if not, write to the Free
16   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17   02111-1307 USA.  */
18
19#ifndef	_STRINGS_H
20#define	_STRINGS_H	1
21
22/* We don't need and should not read this file if <string.h> was already
23   read. The one exception being that if __USE_BSD isn't defined, then
24   these aren't defined in string.h, so we need to define them here.  */
25#if !defined _STRING_H || !defined __USE_BSD
26
27# include <features.h>
28# define __need_size_t
29# include <stddef.h>
30
31/* Tell the caller that we provide correct C++ prototypes.  */
32# if defined __cplusplus && __GNUC_PREREQ (4, 4)
33#  define __CORRECT_ISO_CPP_STRINGS_H_PROTO
34# endif
35
36__BEGIN_DECLS
37
38/* Compare N bytes of S1 and S2 (same as memcmp).  */
39extern int bcmp (__const void *__s1, __const void *__s2, size_t __n)
40     __THROW __attribute_pure__;
41
42/* Copy N bytes of SRC to DEST (like memmove, but args reversed).  */
43extern void bcopy (__const void *__src, void *__dest, size_t __n) __THROW;
44
45/* Set N bytes of S to 0.  */
46extern void bzero (void *__s, size_t __n) __THROW;
47
48/* Return the position of the first bit set in I, or 0 if none are set.
49   The least-significant bit is position 1, the most-significant 32.  */
50extern int ffs (int __i) __THROW __attribute__ ((const));
51
52/* Find the first occurrence of C in S (same as strchr).  */
53# ifdef __CORRECT_ISO_CPP_STRINGS_H_PROTO
54extern "C++"
55{
56extern char *index (char *__s, int __c)
57     __THROW __asm ("index") __attribute_pure__ __nonnull ((1));
58extern __const char *index (__const char *__s, int __c)
59     __THROW __asm ("index") __attribute_pure__ __nonnull ((1));
60
61#  if defined __OPTIMIZE__ && !defined __CORRECT_ISO_CPP_STRING_H_PROTO
62__extern_always_inline char *
63index (char *__s, int __c) __THROW
64{
65  return __builtin_index (__s, __c);
66}
67
68__extern_always_inline __const char *
69index (__const char *__s, int __c) __THROW
70{
71  return __builtin_index (__s, __c);
72}
73#  endif
74}
75# else
76extern char *index (__const char *__s, int __c)
77     __THROW __attribute_pure__ __nonnull ((1));
78# endif
79
80/* Find the last occurrence of C in S (same as strrchr).  */
81# ifdef __CORRECT_ISO_CPP_STRINGS_H_PROTO
82extern "C++"
83{
84extern char *rindex (char *__s, int __c)
85     __THROW __asm ("rindex") __attribute_pure__ __nonnull ((1));
86extern __const char *rindex (__const char *__s, int __c)
87     __THROW __asm ("rindex") __attribute_pure__ __nonnull ((1));
88
89#  if defined __OPTIMIZE__ && !defined __CORRECT_ISO_CPP_STRING_H_PROTO
90__extern_always_inline char *
91rindex (char *__s, int __c) __THROW
92{
93  return __builtin_rindex (__s, __c);
94}
95
96__extern_always_inline __const char *
97rindex (__const char *__s, int __c) __THROW
98{
99  return __builtin_rindex (__s, __c);
100}
101#endif
102}
103# else
104extern char *rindex (__const char *__s, int __c)
105     __THROW __attribute_pure__ __nonnull ((1));
106# endif
107
108/* Compare S1 and S2, ignoring case.  */
109extern int strcasecmp (__const char *__s1, __const char *__s2)
110     __THROW __attribute_pure__;
111
112/* Compare no more than N chars of S1 and S2, ignoring case.  */
113extern int strncasecmp (__const char *__s1, __const char *__s2, size_t __n)
114     __THROW __attribute_pure__;
115
116#ifdef	__USE_XOPEN2K8
117/* The following functions are equivalent to the both above but they
118   take the locale they use for the collation as an extra argument.
119   This is not standardsized but something like will come.  */
120# include <xlocale.h>
121
122/* Again versions of a few functions which use the given locale instead
123   of the global one.  */
124extern int strcasecmp_l (__const char *__s1, __const char *__s2,
125			 __locale_t __loc)
126     __THROW __attribute_pure__ __nonnull ((1, 2, 3));
127
128extern int strncasecmp_l (__const char *__s1, __const char *__s2,
129			  size_t __n, __locale_t __loc)
130     __THROW __attribute_pure__ __nonnull ((1, 2, 4));
131#endif
132
133__END_DECLS
134
135#endif	/* string.h  */
136
137#endif	/* strings.h  */
138