1/* Copyright (C) 1991-2020 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, see 
16 <https://www.gnu.org/licenses/>. */ 
17 
18#ifndef _STRINGS_H 
19#define _STRINGS_H 1 
20 
21#include <features.h> 
22#define __need_size_t 
23#include <stddef.h> 
24 
25/* Tell the caller that we provide correct C++ prototypes. */ 
26#if defined __cplusplus && __GNUC_PREREQ (4, 4) 
27# define __CORRECT_ISO_CPP_STRINGS_H_PROTO 
28#endif 
29 
30__BEGIN_DECLS 
31 
32#if defined __USE_MISC || !defined __USE_XOPEN2K8 
33/* Compare N bytes of S1 and S2 (same as memcmp). */ 
34extern int bcmp (const void *__s1, const void *__s2, size_t __n) 
35 __THROW __attribute_pure__ __nonnull ((1, 2)); 
36 
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/* Find the first occurrence of C in S (same as strchr). */ 
45# ifdef __CORRECT_ISO_CPP_STRINGS_H_PROTO 
46extern "C++" 
47{ 
48extern char *index (char *__s, int __c) 
49 __THROW __asm ("index") __attribute_pure__ __nonnull ((1)); 
50extern const char *index (const char *__s, int __c) 
51 __THROW __asm ("index") __attribute_pure__ __nonnull ((1)); 
52 
53# if defined __OPTIMIZE__ 
54__extern_always_inline char * 
55index (char *__s, int __c) __THROW 
56{ 
57 return __builtin_index (__s, __c); 
58} 
59 
60__extern_always_inline const char * 
61index (const char *__s, int __c) __THROW 
62{ 
63 return __builtin_index (__s, __c); 
64} 
65# endif 
66} 
67# else 
68extern char *index (const char *__s, int __c) 
69 __THROW __attribute_pure__ __nonnull ((1)); 
70# endif 
71 
72/* Find the last occurrence of C in S (same as strrchr). */ 
73# ifdef __CORRECT_ISO_CPP_STRINGS_H_PROTO 
74extern "C++" 
75{ 
76extern char *rindex (char *__s, int __c) 
77 __THROW __asm ("rindex") __attribute_pure__ __nonnull ((1)); 
78extern const char *rindex (const char *__s, int __c) 
79 __THROW __asm ("rindex") __attribute_pure__ __nonnull ((1)); 
80 
81# if defined __OPTIMIZE__ 
82__extern_always_inline char * 
83rindex (char *__s, int __c) __THROW 
84{ 
85 return __builtin_rindex (__s, __c); 
86} 
87 
88__extern_always_inline const char * 
89rindex (const char *__s, int __c) __THROW 
90{ 
91 return __builtin_rindex (__s, __c); 
92} 
93# endif 
94} 
95# else 
96extern char *rindex (const char *__s, int __c) 
97 __THROW __attribute_pure__ __nonnull ((1)); 
98# endif 
99#endif 
100 
101#if defined __USE_MISC || !defined __USE_XOPEN2K8 || defined __USE_XOPEN2K8XSI 
102/* Return the position of the first bit set in I, or 0 if none are set. 
103 The least-significant bit is position 1, the most-significant 32. */ 
104extern int ffs (int __i) __THROW __attribute_const__; 
105#endif 
106 
107/* The following two functions are non-standard but necessary for non-32 bit 
108 platforms. */ 
109# ifdef __USE_MISC 
110extern int ffsl (long int __l) __THROW __attribute_const__; 
111__extension__ extern int ffsll (long long int __ll) 
112 __THROW __attribute_const__; 
113# endif 
114 
115/* Compare S1 and S2, ignoring case. */ 
116extern int strcasecmp (const char *__s1, const char *__s2) 
117 __THROW __attribute_pure__ __nonnull ((1, 2)); 
118 
119/* Compare no more than N chars of S1 and S2, ignoring case. */ 
120extern int strncasecmp (const char *__s1, const char *__s2, size_t __n) 
121 __THROW __attribute_pure__ __nonnull ((1, 2)); 
122 
123#ifdef __USE_XOPEN2K8 
124/* POSIX.1-2008 extended locale interface (see locale.h). */ 
125# include <bits/types/locale_t.h> 
126 
127/* Compare S1 and S2, ignoring case, using collation rules from LOC. */ 
128extern int strcasecmp_l (const char *__s1, const char *__s2, locale_t __loc) 
129 __THROW __attribute_pure__ __nonnull ((1, 2, 3)); 
130 
131/* Compare no more than N chars of S1 and S2, ignoring case, using 
132 collation rules from LOC. */ 
133extern int strncasecmp_l (const char *__s1, const char *__s2, 
134 size_t __n, locale_t __loc) 
135 __THROW __attribute_pure__ __nonnull ((1, 2, 4)); 
136#endif 
137 
138__END_DECLS 
139 
140#if __GNUC_PREREQ (3,4) && __USE_FORTIFY_LEVEL > 0 \ 
141 && defined __fortify_function 
142/* Functions with security checks. */ 
143# if defined __USE_MISC || !defined __USE_XOPEN2K8 
144# include <bits/strings_fortified.h> 
145# endif 
146#endif 
147 
148#endif /* strings.h */ 
149