LXR linux/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
  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 strstrip(char *);
  66#ifndef __HAVE_ARCH_STRSTR
  67extern char * strstr(const char *,const char *);
  68#endif
  69#ifndef __HAVE_ARCH_STRLEN
  70extern __kernel_size_t strlen(const char *);
  71#endif
  72#ifndef __HAVE_ARCH_STRNLEN
  73extern __kernel_size_t strnlen(const char *,__kernel_size_t);
  74#endif
  75#ifndef __HAVE_ARCH_STRPBRK
  76extern char * strpbrk(const char *,const char *);
  77#endif
  78#ifndef __HAVE_ARCH_STRSEP
  79extern char * strsep(char **,const char *);
  80#endif
  81#ifndef __HAVE_ARCH_STRSPN
  82extern __kernel_size_t strspn(const char *,const char *);
  83#endif
  84#ifndef __HAVE_ARCH_STRCSPN
  85extern __kernel_size_t strcspn(const char *,const char *);
  86#endif
  87
  88#ifndef __HAVE_ARCH_MEMSET
  89extern void * memset(void *,int,__kernel_size_t);
  90#endif
  91#ifndef __HAVE_ARCH_MEMCPY
  92extern void * memcpy(void *,const void *,__kernel_size_t);
  93#endif
  94#ifndef __HAVE_ARCH_MEMMOVE
  95extern void * memmove(void *,const void *,__kernel_size_t);
  96#endif
  97#ifndef __HAVE_ARCH_MEMSCAN
  98extern void * memscan(void *,int,__kernel_size_t);
  99#endif
 100#ifndef __HAVE_ARCH_MEMCMP
 101extern int memcmp(const void *,const void *,__kernel_size_t);
 102#endif
 103#ifndef __HAVE_ARCH_MEMCHR
 104extern void * memchr(const void *,int,__kernel_size_t);
 105#endif
 106
 107extern char *kstrdup(const char *s, gfp_t gfp);
 108extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
 109extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
 110
 111extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
 112extern void argv_free(char **argv);
 113
 114extern bool sysfs_streq(const char *s1, const char *s2);
 115
 116#ifdef CONFIG_BINARY_PRINTF
 117int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
 118int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
 119int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4);
 120#endif
 121
 122extern 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 */
 130static 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_ */
 136