Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _LINUX_STRING_H_
2#define _LINUX_STRING_H_
3
4/* We don't want strings.h stuff being used by user stuff by accident */
5
6#ifndef __KERNEL__
7#include <string.h>
8#else
9
10#include <linux/compiler.h> /* for inline */
11#include <linux/types.h> /* for size_t */
12#include <linux/stddef.h> /* for NULL */
13#include <stdarg.h>
14
15extern char *strndup_user(const char __user *, long);
16extern void *memdup_user(const void __user *, size_t);
17
18/*
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
50#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
56#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
65extern char * __must_check skip_spaces(const char *);
66
67extern char *strim(char *);
68
69static inline __must_check char *strstrip(char *str)
70{
71 return strim(str);
72}
73
74#ifndef __HAVE_ARCH_STRSTR
75extern char * strstr(const char *,const char *);
76#endif
77#ifndef __HAVE_ARCH_STRLEN
78extern __kernel_size_t strlen(const char *);
79#endif
80#ifndef __HAVE_ARCH_STRNLEN
81extern __kernel_size_t strnlen(const char *,__kernel_size_t);
82#endif
83#ifndef __HAVE_ARCH_STRPBRK
84extern char * strpbrk(const char *,const char *);
85#endif
86#ifndef __HAVE_ARCH_STRSEP
87extern char * strsep(char **,const char *);
88#endif
89#ifndef __HAVE_ARCH_STRSPN
90extern __kernel_size_t strspn(const char *,const char *);
91#endif
92#ifndef __HAVE_ARCH_STRCSPN
93extern __kernel_size_t strcspn(const char *,const char *);
94#endif
95
96#ifndef __HAVE_ARCH_MEMSET
97extern void * memset(void *,int,__kernel_size_t);
98#endif
99#ifndef __HAVE_ARCH_MEMCPY
100extern void * memcpy(void *,const void *,__kernel_size_t);
101#endif
102#ifndef __HAVE_ARCH_MEMMOVE
103extern void * memmove(void *,const void *,__kernel_size_t);
104#endif
105#ifndef __HAVE_ARCH_MEMSCAN
106extern void * memscan(void *,int,__kernel_size_t);
107#endif
108#ifndef __HAVE_ARCH_MEMCMP
109extern int memcmp(const void *,const void *,__kernel_size_t);
110#endif
111#ifndef __HAVE_ARCH_MEMCHR
112extern void * memchr(const void *,int,__kernel_size_t);
113#endif
114
115extern char *kstrdup(const char *s, gfp_t gfp);
116extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
117extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
118
119extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
120extern void argv_free(char **argv);
121
122extern bool sysfs_streq(const char *s1, const char *s2);
123
124#ifdef CONFIG_BINARY_PRINTF
125int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
126int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
127int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4);
128#endif
129
130extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
131 const void *from, size_t available);
132
133/**
134 * strstarts - does @str start with @prefix?
135 * @str: string to examine
136 * @prefix: prefix to look for.
137 */
138static inline bool strstarts(const char *str, const char *prefix)
139{
140 return strncmp(str, prefix, strlen(prefix)) == 0;
141}
142#endif
143#endif /* _LINUX_STRING_H_ */