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);
13
14/*
15 * Include machine specific inline routines
16 */
17#include <asm/string.h>
18
19#ifndef __HAVE_ARCH_STRCPY
20extern char * strcpy(char *,const char *);
21#endif
22#ifndef __HAVE_ARCH_STRNCPY
23extern char * strncpy(char *,const char *, __kernel_size_t);
24#endif
25#ifndef __HAVE_ARCH_STRLCPY
26size_t strlcpy(char *, const char *, size_t);
27#endif
28#ifndef __HAVE_ARCH_STRSCPY
29ssize_t __must_check strscpy(char *, const char *, size_t);
30#endif
31#ifndef __HAVE_ARCH_STRCAT
32extern char * strcat(char *, const char *);
33#endif
34#ifndef __HAVE_ARCH_STRNCAT
35extern char * strncat(char *, const char *, __kernel_size_t);
36#endif
37#ifndef __HAVE_ARCH_STRLCAT
38extern size_t strlcat(char *, const char *, __kernel_size_t);
39#endif
40#ifndef __HAVE_ARCH_STRCMP
41extern int strcmp(const char *,const char *);
42#endif
43#ifndef __HAVE_ARCH_STRNCMP
44extern int strncmp(const char *,const char *,__kernel_size_t);
45#endif
46#ifndef __HAVE_ARCH_STRCASECMP
47extern int strcasecmp(const char *s1, const char *s2);
48#endif
49#ifndef __HAVE_ARCH_STRNCASECMP
50extern int strncasecmp(const char *s1, const char *s2, size_t n);
51#endif
52#ifndef __HAVE_ARCH_STRCHR
53extern char * strchr(const char *,int);
54#endif
55#ifndef __HAVE_ARCH_STRCHRNUL
56extern char * strchrnul(const char *,int);
57#endif
58#ifndef __HAVE_ARCH_STRNCHR
59extern char * strnchr(const char *, size_t, int);
60#endif
61#ifndef __HAVE_ARCH_STRRCHR
62extern char * strrchr(const char *,int);
63#endif
64extern char * __must_check skip_spaces(const char *);
65
66extern char *strim(char *);
67
68static inline __must_check char *strstrip(char *str)
69{
70 return strim(str);
71}
72
73#ifndef __HAVE_ARCH_STRSTR
74extern char * strstr(const char *, const char *);
75#endif
76#ifndef __HAVE_ARCH_STRNSTR
77extern char * strnstr(const char *, const char *, size_t);
78#endif
79#ifndef __HAVE_ARCH_STRLEN
80extern __kernel_size_t strlen(const char *);
81#endif
82#ifndef __HAVE_ARCH_STRNLEN
83extern __kernel_size_t strnlen(const char *,__kernel_size_t);
84#endif
85#ifndef __HAVE_ARCH_STRPBRK
86extern char * strpbrk(const char *,const char *);
87#endif
88#ifndef __HAVE_ARCH_STRSEP
89extern char * strsep(char **,const char *);
90#endif
91#ifndef __HAVE_ARCH_STRSPN
92extern __kernel_size_t strspn(const char *,const char *);
93#endif
94#ifndef __HAVE_ARCH_STRCSPN
95extern __kernel_size_t strcspn(const char *,const char *);
96#endif
97
98#ifndef __HAVE_ARCH_MEMSET
99extern void * memset(void *,int,__kernel_size_t);
100#endif
101#ifndef __HAVE_ARCH_MEMCPY
102extern void * memcpy(void *,const void *,__kernel_size_t);
103#endif
104#ifndef __HAVE_ARCH_MEMMOVE
105extern void * memmove(void *,const void *,__kernel_size_t);
106#endif
107#ifndef __HAVE_ARCH_MEMSCAN
108extern void * memscan(void *,int,__kernel_size_t);
109#endif
110#ifndef __HAVE_ARCH_MEMCMP
111extern int memcmp(const void *,const void *,__kernel_size_t);
112#endif
113#ifndef __HAVE_ARCH_MEMCHR
114extern void * memchr(const void *,int,__kernel_size_t);
115#endif
116void *memchr_inv(const void *s, int c, size_t n);
117char *strreplace(char *s, char old, char new);
118
119extern void kfree_const(const void *x);
120
121extern char *kstrdup(const char *s, gfp_t gfp);
122extern const char *kstrdup_const(const char *s, gfp_t gfp);
123extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
124extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
125
126extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
127extern void argv_free(char **argv);
128
129extern bool sysfs_streq(const char *s1, const char *s2);
130extern int strtobool(const char *s, bool *res);
131
132#ifdef CONFIG_BINARY_PRINTF
133int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
134int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
135int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4);
136#endif
137
138extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
139 const void *from, size_t available);
140
141/**
142 * strstarts - does @str start with @prefix?
143 * @str: string to examine
144 * @prefix: prefix to look for.
145 */
146static inline bool strstarts(const char *str, const char *prefix)
147{
148 return strncmp(str, prefix, strlen(prefix)) == 0;
149}
150
151size_t memweight(const void *ptr, size_t bytes);
152void memzero_explicit(void *s, size_t count);
153
154/**
155 * kbasename - return the last part of a pathname.
156 *
157 * @path: path to extract the filename from.
158 */
159static inline const char *kbasename(const char *path)
160{
161 const char *tail = strrchr(path, '/');
162 return tail ? tail + 1 : path;
163}
164
165#endif /* _LINUX_STRING_H_ */