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);
  13
  14/*
  15 * Include machine specific inline routines
  16 */
  17#include <asm/string.h>
  18
  19#ifndef __HAVE_ARCH_STRCPY
  20extern char * strcpy(char *,const char *);
  21#endif
  22#ifndef __HAVE_ARCH_STRNCPY
  23extern char * strncpy(char *,const char *, __kernel_size_t);
  24#endif
  25#ifndef __HAVE_ARCH_STRLCPY
  26size_t strlcpy(char *, const char *, size_t);
  27#endif
  28#ifndef __HAVE_ARCH_STRCAT
  29extern char * strcat(char *, const char *);
  30#endif
  31#ifndef __HAVE_ARCH_STRNCAT
  32extern char * strncat(char *, const char *, __kernel_size_t);
  33#endif
  34#ifndef __HAVE_ARCH_STRLCAT
  35extern size_t strlcat(char *, const char *, __kernel_size_t);
  36#endif
  37#ifndef __HAVE_ARCH_STRCMP
  38extern int strcmp(const char *,const char *);
  39#endif
  40#ifndef __HAVE_ARCH_STRNCMP
  41extern int strncmp(const char *,const char *,__kernel_size_t);
  42#endif
  43#ifndef __HAVE_ARCH_STRCASECMP
  44extern int strcasecmp(const char *s1, const char *s2);
  45#endif
  46#ifndef __HAVE_ARCH_STRNCASECMP
  47extern int strncasecmp(const char *s1, const char *s2, size_t n);
  48#endif
  49#ifndef __HAVE_ARCH_STRCHR
  50extern char * strchr(const char *,int);
  51#endif
  52#ifndef __HAVE_ARCH_STRCHRNUL
  53extern char * strchrnul(const char *,int);
  54#endif
  55#ifndef __HAVE_ARCH_STRNCHR
  56extern char * strnchr(const char *, size_t, int);
  57#endif
  58#ifndef __HAVE_ARCH_STRRCHR
  59extern char * strrchr(const char *,int);
  60#endif
  61extern char * __must_check skip_spaces(const char *);
  62
  63extern char *strim(char *);
  64
  65static inline __must_check char *strstrip(char *str)
  66{
  67        return strim(str);
  68}
  69
  70#ifndef __HAVE_ARCH_STRSTR
  71extern char * strstr(const char *, const char *);
  72#endif
  73#ifndef __HAVE_ARCH_STRNSTR
  74extern char * strnstr(const char *, const char *, size_t);
  75#endif
  76#ifndef __HAVE_ARCH_STRLEN
  77extern __kernel_size_t strlen(const char *);
  78#endif
  79#ifndef __HAVE_ARCH_STRNLEN
  80extern __kernel_size_t strnlen(const char *,__kernel_size_t);
  81#endif
  82#ifndef __HAVE_ARCH_STRPBRK
  83extern char * strpbrk(const char *,const char *);
  84#endif
  85#ifndef __HAVE_ARCH_STRSEP
  86extern char * strsep(char **,const char *);
  87#endif
  88#ifndef __HAVE_ARCH_STRSPN
  89extern __kernel_size_t strspn(const char *,const char *);
  90#endif
  91#ifndef __HAVE_ARCH_STRCSPN
  92extern __kernel_size_t strcspn(const char *,const char *);
  93#endif
  94
  95#ifndef __HAVE_ARCH_MEMSET
  96extern void * memset(void *,int,__kernel_size_t);
  97#endif
  98#ifndef __HAVE_ARCH_MEMCPY
  99extern void * memcpy(void *,const void *,__kernel_size_t);
 100#endif
 101#ifndef __HAVE_ARCH_MEMMOVE
 102extern void * memmove(void *,const void *,__kernel_size_t);
 103#endif
 104#ifndef __HAVE_ARCH_MEMSCAN
 105extern void * memscan(void *,int,__kernel_size_t);
 106#endif
 107#ifndef __HAVE_ARCH_MEMCMP
 108extern int memcmp(const void *,const void *,__kernel_size_t);
 109#endif
 110#ifndef __HAVE_ARCH_MEMCHR
 111extern void * memchr(const void *,int,__kernel_size_t);
 112#endif
 113void *memchr_inv(const void *s, int c, size_t n);
 114
 115extern void kfree_const(const void *x);
 116
 117extern char *kstrdup(const char *s, gfp_t gfp);
 118extern const char *kstrdup_const(const char *s, gfp_t gfp);
 119extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
 120extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
 121
 122extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
 123extern void argv_free(char **argv);
 124
 125extern bool sysfs_streq(const char *s1, const char *s2);
 126extern int strtobool(const char *s, bool *res);
 127
 128#ifdef CONFIG_BINARY_PRINTF
 129int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
 130int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
 131int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4);
 132#endif
 133
 134extern 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 */
 142static inline bool strstarts(const char *str, const char *prefix)
 143{
 144        return strncmp(str, prefix, strlen(prefix)) == 0;
 145}
 146
 147size_t memweight(const void *ptr, size_t bytes);
 148void 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 */
 155static 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_ */
 162