linux/include/linux/string.h
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   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
  15extern char *strndup_user(const char __user *, long);
  16extern 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
  24extern char * strcpy(char *,const char *);
  25#endif
  26#ifndef __HAVE_ARCH_STRNCPY
  27extern char * strncpy(char *,const char *, __kernel_size_t);
  28#endif
  29#ifndef __HAVE_ARCH_STRLCPY
  30size_t strlcpy(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_STRNICMP
  48extern int strnicmp(const char *, const char *, __kernel_size_t);
  49#endif
  50#ifndef __HAVE_ARCH_STRCASECMP
  51extern int strcasecmp(const char *s1, const char *s2);
  52#endif
  53#ifndef __HAVE_ARCH_STRNCASECMP
  54extern int strncasecmp(const char *s1, const char *s2, size_t n);
  55#endif
  56#ifndef __HAVE_ARCH_STRCHR
  57extern char * strchr(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);
 118
 119extern char *kstrdup(const char *s, gfp_t gfp);
 120extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
 121extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
 122
 123extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
 124extern void argv_free(char **argv);
 125
 126extern bool sysfs_streq(const char *s1, const char *s2);
 127extern int strtobool(const char *s, bool *res);
 128
 129#ifdef CONFIG_BINARY_PRINTF
 130int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
 131int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
 132int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4);
 133#endif
 134
 135extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
 136                        const void *from, size_t available);
 137
 138/**
 139 * strstarts - does @str start with @prefix?
 140 * @str: string to examine
 141 * @prefix: prefix to look for.
 142 */
 143static inline bool strstarts(const char *str, const char *prefix)
 144{
 145        return strncmp(str, prefix, strlen(prefix)) == 0;
 146}
 147
 148extern size_t memweight(const void *ptr, size_t bytes);
 149
 150#endif /* __KERNEL__ */
 151#endif /* _LINUX_STRING_H_ */
 152
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