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Linux/include/linux/string.h

  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 extern 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
 21 extern char * strcpy(char *,const char *);
 22 #endif
 23 #ifndef __HAVE_ARCH_STRNCPY
 24 extern char * strncpy(char *,const char *, __kernel_size_t);
 25 #endif
 26 #ifndef __HAVE_ARCH_STRLCPY
 27 size_t strlcpy(char *, const char *, size_t);
 28 #endif
 29 #ifndef __HAVE_ARCH_STRSCPY
 30 ssize_t __must_check strscpy(char *, const char *, size_t);
 31 #endif
 32 #ifndef __HAVE_ARCH_STRCAT
 33 extern char * strcat(char *, const char *);
 34 #endif
 35 #ifndef __HAVE_ARCH_STRNCAT
 36 extern char * strncat(char *, const char *, __kernel_size_t);
 37 #endif
 38 #ifndef __HAVE_ARCH_STRLCAT
 39 extern size_t strlcat(char *, const char *, __kernel_size_t);
 40 #endif
 41 #ifndef __HAVE_ARCH_STRCMP
 42 extern int strcmp(const char *,const char *);
 43 #endif
 44 #ifndef __HAVE_ARCH_STRNCMP
 45 extern int strncmp(const char *,const char *,__kernel_size_t);
 46 #endif
 47 #ifndef __HAVE_ARCH_STRCASECMP
 48 extern int strcasecmp(const char *s1, const char *s2);
 49 #endif
 50 #ifndef __HAVE_ARCH_STRNCASECMP
 51 extern int strncasecmp(const char *s1, const char *s2, size_t n);
 52 #endif
 53 #ifndef __HAVE_ARCH_STRCHR
 54 extern char * strchr(const char *,int);
 55 #endif
 56 #ifndef __HAVE_ARCH_STRCHRNUL
 57 extern char * strchrnul(const char *,int);
 58 #endif
 59 #ifndef __HAVE_ARCH_STRNCHR
 60 extern char * strnchr(const char *, size_t, int);
 61 #endif
 62 #ifndef __HAVE_ARCH_STRRCHR
 63 extern char * strrchr(const char *,int);
 64 #endif
 65 extern char * __must_check skip_spaces(const char *);
 66 
 67 extern char *strim(char *);
 68 
 69 static inline __must_check char *strstrip(char *str)
 70 {
 71         return strim(str);
 72 }
 73 
 74 #ifndef __HAVE_ARCH_STRSTR
 75 extern char * strstr(const char *, const char *);
 76 #endif
 77 #ifndef __HAVE_ARCH_STRNSTR
 78 extern char * strnstr(const char *, const char *, size_t);
 79 #endif
 80 #ifndef __HAVE_ARCH_STRLEN
 81 extern __kernel_size_t strlen(const char *);
 82 #endif
 83 #ifndef __HAVE_ARCH_STRNLEN
 84 extern __kernel_size_t strnlen(const char *,__kernel_size_t);
 85 #endif
 86 #ifndef __HAVE_ARCH_STRPBRK
 87 extern char * strpbrk(const char *,const char *);
 88 #endif
 89 #ifndef __HAVE_ARCH_STRSEP
 90 extern char * strsep(char **,const char *);
 91 #endif
 92 #ifndef __HAVE_ARCH_STRSPN
 93 extern __kernel_size_t strspn(const char *,const char *);
 94 #endif
 95 #ifndef __HAVE_ARCH_STRCSPN
 96 extern __kernel_size_t strcspn(const char *,const char *);
 97 #endif
 98 
 99 #ifndef __HAVE_ARCH_MEMSET
100 extern void * memset(void *,int,__kernel_size_t);
101 #endif
102 #ifndef __HAVE_ARCH_MEMCPY
103 extern void * memcpy(void *,const void *,__kernel_size_t);
104 #endif
105 #ifndef __HAVE_ARCH_MEMMOVE
106 extern void * memmove(void *,const void *,__kernel_size_t);
107 #endif
108 #ifndef __HAVE_ARCH_MEMSCAN
109 extern void * memscan(void *,int,__kernel_size_t);
110 #endif
111 #ifndef __HAVE_ARCH_MEMCMP
112 extern int memcmp(const void *,const void *,__kernel_size_t);
113 #endif
114 #ifndef __HAVE_ARCH_MEMCHR
115 extern void * memchr(const void *,int,__kernel_size_t);
116 #endif
117 void *memchr_inv(const void *s, int c, size_t n);
118 char *strreplace(char *s, char old, char new);
119 
120 extern void kfree_const(const void *x);
121 
122 extern char *kstrdup(const char *s, gfp_t gfp) __malloc;
123 extern const char *kstrdup_const(const char *s, gfp_t gfp);
124 extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
125 extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
126 
127 extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
128 extern void argv_free(char **argv);
129 
130 extern bool sysfs_streq(const char *s1, const char *s2);
131 extern int kstrtobool(const char *s, bool *res);
132 static inline int strtobool(const char *s, bool *res)
133 {
134         return kstrtobool(s, res);
135 }
136 
137 int match_string(const char * const *array, size_t n, const char *string);
138 
139 #ifdef CONFIG_BINARY_PRINTF
140 int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
141 int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
142 int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4);
143 #endif
144 
145 extern 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  */
153 static inline bool strstarts(const char *str, const char *prefix)
154 {
155         return strncmp(str, prefix, strlen(prefix)) == 0;
156 }
157 
158 size_t memweight(const void *ptr, size_t bytes);
159 void 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  */
166 static 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_ */
173 

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