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 #if 0   // mask by Victor Yu. 02-12-2007
  17 extern void * memcpy(void *, const void *, __kernel_size_t);
  18 #endif
  19
  20 #define __HAVE_ARCH_MEMMOVE
  21 extern void * memmove(void *, const void *, __kernel_size_t);
  22
  23 #define __HAVE_ARCH_MEMCHR
  24 extern void * memchr(const void *, int, __kernel_size_t);
  25
  26 #define __HAVE_ARCH_MEMZERO
  27 #define __HAVE_ARCH_MEMSET
  28 #if 0   // mask by Victor Yu. 02-12-2007
  29 extern void * memset(void *, int, __kernel_size_t);
  30 #endif
  31
  32 extern void __memzero(void *ptr, __kernel_size_t n);
  33
  34 #define memset(p,v,n)                                                   \
  35         ({                                                              \
  36                 void *__p = (p); size_t __n = n;                        \
  37                 if ((__n) != 0) {                                       \
  38                         if (__builtin_constant_p((v)) && (v) == 0)      \
  39                                 __memzero((__p),(__n));                 \
  40                         else                                            \
  41                                 memset((__p),(v),(__n));                \
  42                 }                                                       \
  43                 (__p);                                                  \
  44         })
  45
  46 #define memzero(p,n)                                                    \
  47         ({                                                              \
  48                 void *__p = (p); size_t __n = n;                        \
  49                 if ((__n) != 0)                                         \
  50                         __memzero((__p),(__n));                         \
  51                 (__p);                                                  \
  52          })
  53
  54 #endif