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);
  27extern void * memset(void *, int, size_t);
  28
  29/* For gcc 3.x, we cannot have the inline function named "memset" because
  30   the __builtin_memset will attempt to resolve to the inline as well,
  31   leading to a "sorry" about unimplemented recursive inlining.  */
  32extern inline void *__memset(void *s, int c, size_t n)
  33{
  34        if (__builtin_constant_p(c)) {
  35                if (__builtin_constant_p(n)) {
  36                        return __builtin_memset(s, c, n);
  37                } else {
  38                        unsigned long c8 = (c & 0xff) * 0x0101010101010101UL;
  39                        return __constant_c_memset(s, c8, n);
  40                }
  41        }
  42        return ___memset(s, c, n);
  43}
  44
  45#define memset __memset
  46
  47#define __HAVE_ARCH_STRCPY
  48extern char * strcpy(char *,const char *);
  49#define __HAVE_ARCH_STRNCPY
  50extern char * strncpy(char *, const char *, size_t);
  51#define __HAVE_ARCH_STRCAT
  52extern char * strcat(char *, const char *);
  53#define __HAVE_ARCH_STRNCAT
  54extern char * strncat(char *, const char *, size_t);
  55#define __HAVE_ARCH_STRCHR
  56extern char * strchr(const char *,int);
  57#define __HAVE_ARCH_STRRCHR
  58extern char * strrchr(const char *,int);
  59#define __HAVE_ARCH_STRLEN
  60extern size_t strlen(const char *);
  61#define __HAVE_ARCH_MEMCHR
  62extern void * memchr(const void *, int, size_t);
  63
  64/* The following routine is like memset except that it writes 16-bit
  65   aligned values.  The DEST and COUNT parameters must be even for 
  66   correct operation.  */
  67
  68#define __HAVE_ARCH_MEMSETW
  69extern void * __memsetw(void *dest, unsigned short, size_t count);
  70
  71#define memsetw(s, c, n)                                                 \
  72(__builtin_constant_p(c)                                                 \
  73 ? __constant_c_memset((s),0x0001000100010001UL*(unsigned short)(c),(n)) \
  74 : __memsetw((s),(c),(n)))
  75
  76#endif /* __KERNEL__ */
  77
  78#endif /* __ALPHA_STRING_H__ */
  79