memmove.c

来自「Mac OS X 10.4.9 for x86 Source Code gcc」· C语言 代码 · 共 31 行

extern int inside_main;

void *
memmove (void *dst, const void *src, __SIZE_TYPE__ n)
{
  char *dstp;
  const char *srcp;

#ifdef __OPTIMIZE__
  if (inside_main)
    abort ();
#endif

  srcp = src;
  dstp = dst;
  if (srcp < dstp)
    while (n-- != 0)
      dstp[n] = srcp[n];
  else
    while (n-- != 0)
      *dstp++ = *srcp++;

  return dst;
}

void
bcopy (const void *src, void *dst, __SIZE_TYPE__ n)
{
  memmove (dst, src, n);
}