include/asm-arm/string.h

   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
  10 extern char * strrchr(const char * s, int c);
  11
  12 #define __HAVE_ARCH_STRCHR
  13 extern char * strchr(const char * s, int c);
  14
  15 #define __HAVE_ARCH_MEMCPY
  16 extern void * memcpy(void *, const void *, __kernel_size_t);
  17
  18 #define __HAVE_ARCH_MEMMOVE
  19 extern void * memmove(void *, const void *, __kernel_size_t);
  20
  21 #define __HAVE_ARCH_MEMCHR
  22 extern void * memchr(const void *, int, __kernel_size_t);
  23
  24 #define __HAVE_ARCH_MEMZERO
  25 #define __HAVE_ARCH_MEMSET
  26 extern void * memset(void *, int, __kernel_size_t);
  27
  28 extern void __memzero(void *ptr, __kernel_size_t n);
  29
  30 #define memset(p,v,n)                                                   \
  31         ({                                                              \
  32                 void *__p = (p); size_t __n = n;                        \
  33                 if ((__n) != 0) {                                       \
  34                         if (__builtin_constant_p((v)) && (v) == 0)      \
  35                                 __memzero((__p),(__n));                 \
  36                         else                                            \
  37                                 memset((__p),(v),(__n));                \
  38                 }                                                       \
  39                 (__p);                                                  \
  40         })
  41
  42 #define memzero(p,n)                                                    \
  43         ({                                                              \
  44                 void *__p = (p); size_t __n = n;                        \
  45                 if ((__n) != 0)                                         \
  46                         __memzero((__p),(__n));                         \
  47                 (__p);                                                  \
  48          })
  49
  50 #endif