LXR 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
  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);
 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_ */
 173