arch/arm/include/asm/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_MEMSET
  25 extern void * memset(void *, int, __kernel_size_t);
  26
  27 #define __HAVE_ARCH_MEMSET32
  28 extern void *__memset32(uint32_t *, uint32_t v, __kernel_size_t);
  29 static inline void *memset32(uint32_t *p, uint32_t v, __kernel_size_t n)
  30 {
  31         return __memset32(p, v, n * 4);
  32 }
  33
  34 #define __HAVE_ARCH_MEMSET64
  35 extern void *__memset64(uint64_t *, uint32_t low, __kernel_size_t, uint32_t hi);
  36 static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n)
  37 {
  38         return __memset64(p, v, n * 8, v >> 32);
  39 }
  40
  41 extern void __memzero(void *ptr, __kernel_size_t n);
  42
  43 #define memset(p,v,n)                                                   \
  44         ({                                                              \
  45                 void *__p = (p); size_t __n = n;                        \
  46                 if ((__n) != 0) {                                       \
  47                         if (__builtin_constant_p((v)) && (v) == 0)      \
  48                                 __memzero((__p),(__n));                 \
  49                         else                                            \
  50                                 memset((__p),(v),(__n));                \
  51                 }                                                       \
  52                 (__p);                                                  \
  53         })
  54
  55 #endif