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
5#include <linux/compiler.h> /* for inline */
6#include <linux/types.h> /* for size_t */
7#include <linux/stddef.h> /* for NULL */
8#include <stdarg.h>
9#include <uapi/linux/string.h>
10
11extern char *strndup_user(const char __user *, long);
12extern void *memdup_user(const void __user *, size_t);
13extern void *memdup_user_nul(const void __user *, size_t);
14
15/*
16 * Include machine specific inline routines
17 */
18#include <asm/string.h>
19
20#ifndef __HAVE_ARCH_STRCPY
21extern char * strcpy(char *,const char *);
22#endif
23#ifndef __HAVE_ARCH_STRNCPY
24extern char * strncpy(char *,const char *, __kernel_size_t);
25#endif
26#ifndef __HAVE_ARCH_STRLCPY
27size_t strlcpy(char *, const char *, size_t);
28#endif
29#ifndef __HAVE_ARCH_STRSCPY
30ssize_t __must_check strscpy(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_STRCASECMP
48extern int strcasecmp(const char *s1, const char *s2);
49#endif
50#ifndef __HAVE_ARCH_STRNCASECMP
51extern int strncasecmp(const char *s1, const char *s2, size_t n);
52#endif
53#ifndef __HAVE_ARCH_STRCHR
54extern char * strchr(const char *,int);
55#endif
56#ifndef __HAVE_ARCH_STRCHRNUL
57extern char * strchrnul(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_STRNSTR
78extern char * strnstr(const char *, const char *, size_t);
79#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
86#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
98
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
117void *memchr_inv(const void *s, int c, size_t n);
118char *strreplace(char *s, char old, char new);
119
120extern void kfree_const(const void *x);
121
122extern char *kstrdup(const char *s, gfp_t gfp) __malloc;
123extern const char *kstrdup_const(const char *s, gfp_t gfp);
124extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
125extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
126
127extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
128extern void argv_free(char **argv);
129
130extern bool sysfs_streq(const char *s1, const char *s2);
131extern int kstrtobool(const char *s, bool *res);
132static inline int strtobool(const char *s, bool *res)
133{
134 return kstrtobool(s, res);
135}
136
137int match_string(const char * const *array, size_t n, const char *string);
138
139#ifdef CONFIG_BINARY_PRINTF
140int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
141int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
142int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4);
143#endif
144
145extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
146 const void *from, size_t available);
147
148/**
149 * strstarts - does @str start with @prefix?
150 * @str: string to examine
151 * @prefix: prefix to look for.
152 */
153static inline bool strstarts(const char *str, const char *prefix)
154{
155 return strncmp(str, prefix, strlen(prefix)) == 0;
156}
157
158size_t memweight(const void *ptr, size_t bytes);
159void memzero_explicit(void *s, size_t count);
160
161/**
162 * kbasename - return the last part of a pathname.
163 *
164 * @path: path to extract the filename from.
165 */
166static inline const char *kbasename(const char *path)
167{
168 const char *tail = strrchr(path, '/');
169 return tail ? tail + 1 : path;
170}
171
172#endif /* _LINUX_STRING_H_ */