LXR linux/arch/alpha/include/asm/string.h

   1#ifndef __ALPHA_STRING_H__
   2#define __ALPHA_STRING_H__
   3
   4#ifdef __KERNEL__
   5
   6/*
   7 * GCC of any recent vintage doesn't do stupid things with bcopy.
   8 * EGCS 1.1 knows all about expanding memcpy inline, others don't.
   9 *
  10 * Similarly for a memset with data = 0.
  11 */
  12
  13#define __HAVE_ARCH_MEMCPY
  14extern void * memcpy(void *, const void *, size_t);
  15#define __HAVE_ARCH_MEMMOVE
  16extern void * memmove(void *, const void *, size_t);
  17
  18/* For backward compatibility with modules.  Unused otherwise.  */
  19extern void * __memcpy(void *, const void *, size_t);
  20
  21#define memcpy __builtin_memcpy
  22
  23#define __HAVE_ARCH_MEMSET
  24extern void * __constant_c_memset(void *, unsigned long, size_t);
  25extern void * __memset(void *, int, size_t);
  26extern void * memset(void *, int, size_t);
  27
  28#define memset(s, c, n)                                                     \
  29(__builtin_constant_p(c)                                                    \
  30 ? (__builtin_constant_p(n) && (c) == 0                                     \
  31    ? __builtin_memset((s),0,(n))                                           \
  32    : __constant_c_memset((s),0x0101010101010101UL*(unsigned char)(c),(n))) \
  33 : __memset((s),(c),(n)))
  34
  35#define __HAVE_ARCH_STRCPY
  36extern char * strcpy(char *,const char *);
  37#define __HAVE_ARCH_STRNCPY
  38extern char * strncpy(char *, const char *, size_t);
  39#define __HAVE_ARCH_STRCAT
  40extern char * strcat(char *, const char *);
  41#define __HAVE_ARCH_STRNCAT
  42extern char * strncat(char *, const char *, size_t);
  43#define __HAVE_ARCH_STRCHR
  44extern char * strchr(const char *,int);
  45#define __HAVE_ARCH_STRRCHR
  46extern char * strrchr(const char *,int);
  47#define __HAVE_ARCH_STRLEN
  48extern size_t strlen(const char *);
  49#define __HAVE_ARCH_MEMCHR
  50extern void * memchr(const void *, int, size_t);
  51
  52/* The following routine is like memset except that it writes 16-bit
  53   aligned values.  The DEST and COUNT parameters must be even for 
  54   correct operation.  */
  55
  56#define __HAVE_ARCH_MEMSETW
  57extern void * __memsetw(void *dest, unsigned short, size_t count);
  58
  59#define memsetw(s, c, n)                                                 \
  60(__builtin_constant_p(c)                                                 \
  61 ? __constant_c_memset((s),0x0001000100010001UL*(unsigned short)(c),(n)) \
  62 : __memsetw((s),(c),(n)))
  63
  64#endif /* __KERNEL__ */
  65
  66#endif /* __ALPHA_STRING_H__ */
  67