linux/arch/arm/include/asm/string.h
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   1#ifndef __ASM_ARM_STRING_H
   2#define __ASM_ARM_STRING_H
   3
   4/*
   5 * We don't do inline string functions, since the
   6 * optimised inline asm versions are not small.
   7 */
   8
   9#define __HAVE_ARCH_STRRCHR
  10extern char * strrchr(const char * s, int c);
  11
  12#define __HAVE_ARCH_STRCHR
  13extern char * strchr(const char * s, int c);
  14
  15#define __HAVE_ARCH_MEMCPY
  16extern void * memcpy(void *, const void *, __kernel_size_t);
  17
  18#define __HAVE_ARCH_MEMMOVE
  19extern void * memmove(void *, const void *, __kernel_size_t);
  20
  21#define __HAVE_ARCH_MEMCHR
  22extern void * memchr(const void *, int, __kernel_size_t);
  23
  24#define __HAVE_ARCH_MEMSET
  25extern void * memset(void *, int, __kernel_size_t);
  26
  27extern void __memzero(void *ptr, __kernel_size_t n);
  28
  29#define memset(p,v,n)                                                   \
  30        ({                                                              \
  31                void *__p = (p); size_t __n = n;                        \
  32                if ((__n) != 0) {                                       \
  33                        if (__builtin_constant_p((v)) && (v) == 0)      \
  34                                __memzero((__p),(__n));                 \
  35                        else                                            \
  36                                memset((__p),(v),(__n));                \
  37                }                                                       \
  38                (__p);                                                  \
  39        })
  40
  41#endif
  42
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