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