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yuezonghe824eb0c2024-06-27 02:32:26 -07001/* Copyright (C) 1991,92,96,97,99,2000,2001 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
26/* keep this file in sync w/ string.h, the glibc version is out of date */
27
28#if !defined _STRING_H || !defined __USE_BSD
29
30# include <features.h>
31# define __need_size_t
32# include <stddef.h>
33
34__BEGIN_DECLS
35
36# ifdef __UCLIBC_SUSV3_LEGACY__
37/* Copy N bytes of SRC to DEST (like memmove, but args reversed). */
38extern void bcopy (__const void *__src, void *__dest, size_t __n)
39 __THROW __nonnull ((1, 2));
40
41/* Set N bytes of S to 0. */
42extern void bzero (void *__s, size_t __n) __THROW __nonnull ((1));
43
44/* Compare N bytes of S1 and S2 (same as memcmp). */
45extern int bcmp (__const void *__s1, __const void *__s2, size_t __n)
46 __THROW __attribute_pure__ __nonnull ((1, 2));
47
48/* Find the first occurrence of C in S (same as strchr). */
49extern char *index (__const char *__s, int __c)
50 __THROW __attribute_pure__ __nonnull ((1));
51
52/* Find the last occurrence of C in S (same as strrchr). */
53extern char *rindex (__const char *__s, int __c)
54 __THROW __attribute_pure__ __nonnull ((1));
55# else
56# ifdef __UCLIBC_SUSV3_LEGACY_MACROS__
57/* bcopy/bzero/bcmp/index/rindex are marked LEGACY in SuSv3.
58 * They are replaced as proposed by SuSv3. Don't sync this part
59 * with glibc and keep it in sync with string.h. */
60
61# define bcopy(src,dest,n) (memmove((dest), (src), (n)), (void) 0)
62# define bzero(s,n) (memset((s), '\0', (n)), (void) 0)
63# define bcmp(s1,s2,n) memcmp((s1), (s2), (size_t)(n))
64# define index(s,c) strchr((s), (c))
65# define rindex(s,c) strrchr((s), (c))
66# endif
67# endif
68
69/* Return the position of the first bit set in I, or 0 if none are set.
70 The least-significant bit is position 1, the most-significant 32. */
71extern int ffs (int __i) __THROW __attribute__ ((__const__));
72
73/* The following two functions are non-standard but necessary for non-32 bit
74 platforms. */
75#if 0 /*def __USE_GNU*/
76extern int ffsl (long int __l) __THROW __attribute__ ((__const__));
77# ifdef __GNUC__
78__extension__ extern int ffsll (long long int __ll)
79 __THROW __attribute__ ((__const__));
80# endif
81# endif
82
83/* Compare S1 and S2, ignoring case. */
84extern int strcasecmp (__const char *__s1, __const char *__s2)
85 __THROW __attribute_pure__ __nonnull ((1, 2));
86
87/* Compare no more than N chars of S1 and S2, ignoring case. */
88extern int strncasecmp (__const char *__s1, __const char *__s2, size_t __n)
89 __THROW __attribute_pure__ __nonnull ((1, 2));
90
91__END_DECLS
92
93
94#ifdef _LIBC
95#error "<strings.h> should not be included from libc."
96#endif
97
98
99#endif /* string.h */
100
101#endif /* strings.h */