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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _LINUX_STRING_H_
2#define _LINUX_STRING_H_
3
Jeff Garzik4ac96572008-11-02 09:51:27 -05004/* We don't want strings.h stuff being used by user stuff by accident */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005
David S. Miller97ef1bb2007-10-30 21:44:00 -07006#ifndef __KERNEL__
7#include <string.h>
8#else
Linus Torvalds1da177e2005-04-16 15:20:36 -07009
10#include <linux/compiler.h> /* for inline */
11#include <linux/types.h> /* for size_t */
12#include <linux/stddef.h> /* for NULL */
Lai Jiangshan4370aa42009-03-06 17:21:46 +010013#include <stdarg.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014
Davi Arnaut96840aa2006-03-24 03:18:42 -080015extern char *strndup_user(const char __user *, long);
Li Zefan610a77e2009-03-31 15:23:16 -070016extern void *memdup_user(const void __user *, size_t);
Davi Arnaut96840aa2006-03-24 03:18:42 -080017
Linus Torvalds1da177e2005-04-16 15:20:36 -070018/*
19 * Include machine specific inline routines
20 */
21#include <asm/string.h>
22
23#ifndef __HAVE_ARCH_STRCPY
24extern char * strcpy(char *,const char *);
25#endif
26#ifndef __HAVE_ARCH_STRNCPY
27extern char * strncpy(char *,const char *, __kernel_size_t);
28#endif
29#ifndef __HAVE_ARCH_STRLCPY
30size_t strlcpy(char *, const char *, size_t);
31#endif
32#ifndef __HAVE_ARCH_STRCAT
33extern char * strcat(char *, const char *);
34#endif
35#ifndef __HAVE_ARCH_STRNCAT
36extern char * strncat(char *, const char *, __kernel_size_t);
37#endif
38#ifndef __HAVE_ARCH_STRLCAT
39extern size_t strlcat(char *, const char *, __kernel_size_t);
40#endif
41#ifndef __HAVE_ARCH_STRCMP
42extern int strcmp(const char *,const char *);
43#endif
44#ifndef __HAVE_ARCH_STRNCMP
45extern int strncmp(const char *,const char *,__kernel_size_t);
46#endif
47#ifndef __HAVE_ARCH_STRNICMP
48extern int strnicmp(const char *, const char *, __kernel_size_t);
49#endif
David S. Millerded220b2007-03-29 01:18:42 -070050#ifndef __HAVE_ARCH_STRCASECMP
51extern int strcasecmp(const char *s1, const char *s2);
52#endif
53#ifndef __HAVE_ARCH_STRNCASECMP
54extern int strncasecmp(const char *s1, const char *s2, size_t n);
55#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#ifndef __HAVE_ARCH_STRCHR
57extern char * strchr(const char *,int);
58#endif
59#ifndef __HAVE_ARCH_STRNCHR
60extern char * strnchr(const char *, size_t, int);
61#endif
62#ifndef __HAVE_ARCH_STRRCHR
63extern char * strrchr(const char *,int);
64#endif
André Goddard Rosaf6533982009-12-14 18:01:04 -080065extern char * __must_check skip_spaces(const char *);
KOSAKI Motohiroca54cb82009-12-14 18:01:15 -080066
67extern char *strim(char *);
68
69static inline __must_check char *strstrip(char *str)
70{
71 return strim(str);
72}
73
Linus Torvalds1da177e2005-04-16 15:20:36 -070074#ifndef __HAVE_ARCH_STRSTR
Li Zefand5f1fb52010-01-14 10:53:55 +080075extern char * strstr(const char *, const char *);
76#endif
77#ifndef __HAVE_ARCH_STRNSTR
78extern char * strnstr(const char *, const char *, size_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079#endif
80#ifndef __HAVE_ARCH_STRLEN
81extern __kernel_size_t strlen(const char *);
82#endif
83#ifndef __HAVE_ARCH_STRNLEN
84extern __kernel_size_t strnlen(const char *,__kernel_size_t);
85#endif
Kyle McMartin8833d322006-04-10 22:53:57 -070086#ifndef __HAVE_ARCH_STRPBRK
87extern char * strpbrk(const char *,const char *);
88#endif
89#ifndef __HAVE_ARCH_STRSEP
90extern char * strsep(char **,const char *);
91#endif
92#ifndef __HAVE_ARCH_STRSPN
93extern __kernel_size_t strspn(const char *,const char *);
94#endif
95#ifndef __HAVE_ARCH_STRCSPN
96extern __kernel_size_t strcspn(const char *,const char *);
97#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
99#ifndef __HAVE_ARCH_MEMSET
100extern void * memset(void *,int,__kernel_size_t);
101#endif
102#ifndef __HAVE_ARCH_MEMCPY
103extern void * memcpy(void *,const void *,__kernel_size_t);
104#endif
105#ifndef __HAVE_ARCH_MEMMOVE
106extern void * memmove(void *,const void *,__kernel_size_t);
107#endif
108#ifndef __HAVE_ARCH_MEMSCAN
109extern void * memscan(void *,int,__kernel_size_t);
110#endif
111#ifndef __HAVE_ARCH_MEMCMP
112extern int memcmp(const void *,const void *,__kernel_size_t);
113#endif
114#ifndef __HAVE_ARCH_MEMCHR
115extern void * memchr(const void *,int,__kernel_size_t);
116#endif
117
Al Virodd0fc662005-10-07 07:46:04 +0100118extern char *kstrdup(const char *s, gfp_t gfp);
Jeremy Fitzhardinge1e66df32007-07-17 18:37:02 -0700119extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
Alexey Dobriyan1a2f67b2006-09-30 23:27:20 -0700120extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
Paulo Marques543537b2005-06-23 00:09:02 -0700121
Jeremy Fitzhardinged84d1cc2007-07-17 18:37:02 -0700122extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
123extern void argv_free(char **argv);
124
David Brownell34990cf2008-05-01 04:34:42 -0700125extern bool sysfs_streq(const char *s1, const char *s2);
Jonathan Camerond0f1fed2011-04-19 12:43:45 +0100126extern int strtobool(const char *s, bool *res);
David Brownell34990cf2008-05-01 04:34:42 -0700127
Lai Jiangshan4370aa42009-03-06 17:21:46 +0100128#ifdef CONFIG_BINARY_PRINTF
129int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
130int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
131int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4);
132#endif
133
Akinobu Mitae108526e2008-07-23 21:26:44 -0700134extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
135 const void *from, size_t available);
136
Rusty Russell66f92cf2009-03-31 13:05:36 -0600137/**
138 * strstarts - does @str start with @prefix?
139 * @str: string to examine
140 * @prefix: prefix to look for.
141 */
142static inline bool strstarts(const char *str, const char *prefix)
143{
144 return strncmp(str, prefix, strlen(prefix)) == 0;
145}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146#endif
147#endif /* _LINUX_STRING_H_ */