include/linux/string.h

   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
  15 extern char *strndup_user(const char __user *, long);
  16 extern 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
  24 extern char * strcpy(char *,const char *);
  25 #endif
  26 #ifndef __HAVE_ARCH_STRNCPY
  27 extern char * strncpy(char *,const char *, __kernel_size_t);
  28 #endif
  29 #ifndef __HAVE_ARCH_STRLCPY
  30 size_t strlcpy(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_STRNICMP
  48 extern int strnicmp(const char *, const char *, __kernel_size_t);
  49 #endif
  50 #ifndef __HAVE_ARCH_STRCASECMP
  51 extern int strcasecmp(const char *s1, const char *s2);
  52 #endif
  53 #ifndef __HAVE_ARCH_STRNCASECMP
  54 extern int strncasecmp(const char *s1, const char *s2, size_t n);
  55 #endif
  56 #ifndef __HAVE_ARCH_STRCHR
  57 extern char * strchr(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 strstrip(char *);
  66 #ifndef __HAVE_ARCH_STRSTR
  67 extern char * strstr(const char *,const char *);
  68 #endif
  69 #ifndef __HAVE_ARCH_STRLEN
  70 extern __kernel_size_t strlen(const char *);
  71 #endif
  72 #ifndef __HAVE_ARCH_STRNLEN
  73 extern __kernel_size_t strnlen(const char *,__kernel_size_t);
  74 #endif
  75 #ifndef __HAVE_ARCH_STRPBRK
  76 extern char * strpbrk(const char *,const char *);
  77 #endif
  78 #ifndef __HAVE_ARCH_STRSEP
  79 extern char * strsep(char **,const char *);
  80 #endif
  81 #ifndef __HAVE_ARCH_STRSPN
  82 extern __kernel_size_t strspn(const char *,const char *);
  83 #endif
  84 #ifndef __HAVE_ARCH_STRCSPN
  85 extern __kernel_size_t strcspn(const char *,const char *);
  86 #endif
  87
  88 #ifndef __HAVE_ARCH_MEMSET
  89 extern void * memset(void *,int,__kernel_size_t);
  90 #endif
  91 #ifndef __HAVE_ARCH_MEMCPY
  92 extern void * memcpy(void *,const void *,__kernel_size_t);
  93 #endif
  94 #ifndef __HAVE_ARCH_MEMMOVE
  95 extern void * memmove(void *,const void *,__kernel_size_t);
  96 #endif
  97 #ifndef __HAVE_ARCH_MEMSCAN
  98 extern void * memscan(void *,int,__kernel_size_t);
  99 #endif
 100 #ifndef __HAVE_ARCH_MEMCMP
 101 extern int memcmp(const void *,const void *,__kernel_size_t);
 102 #endif
 103 #ifndef __HAVE_ARCH_MEMCHR
 104 extern void * memchr(const void *,int,__kernel_size_t);
 105 #endif
 106
 107 extern char *kstrdup(const char *s, gfp_t gfp);
 108 extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
 109 extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
 110
 111 extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
 112 extern void argv_free(char **argv);
 113
 114 extern bool sysfs_streq(const char *s1, const char *s2);
 115
 116 #ifdef CONFIG_BINARY_PRINTF
 117 int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
 118 int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
 119 int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4);
 120 #endif
 121
 122 extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
 123                         const void *from, size_t available);
 124
 125 /**
 126  * strstarts - does @str start with @prefix?
 127  * @str: string to examine
 128  * @prefix: prefix to look for.
 129  */
 130 static inline bool strstarts(const char *str, const char *prefix)
 131 {
 132         return strncmp(str, prefix, strlen(prefix)) == 0;
 133 }
 134 #endif
 135 #endif /* _LINUX_STRING_H_ */