misc/port.c

   1 /*
   2  * Misc. functions for systems that don't have them
   3  *
   4  * Copyright 1996 Alexandre Julliard
   5  */
   6
   7 #include "config.h"
   8 #include <sys/types.h>
   9 #include <sys/time.h>
  10
  11 #ifndef HAVE_USLEEP
  12 unsigned int usleep (unsigned int useconds)
  13 {
  14     struct timeval delay;
  15
  16     delay.tv_sec = 0;
  17     delay.tv_usec = useconds;
  18
  19     select( 0, 0, 0, 0, &delay );
  20     return 0;
  21 }
  22 #endif /* HAVE_USLEEP */
  23
  24 #ifndef HAVE_MEMMOVE
  25 void *memmove( void *dest, const void *src, unsigned int len )
  26 {
  27     register char *dst = dest;
  28
  29     /* Use memcpy if not overlapping */
  30     if ((dst + len <= (char *)src) || ((char *)src + len <= dst))
  31     {
  32         memcpy( dst, src, len );
  33     }
  34     /* Otherwise do it the hard way (FIXME: could do better than this) */
  35     else if (dst < src)
  36     {
  37         while (len--) *dst++ = *((char *)src)++;
  38     }
  39     else
  40     {
  41         dst += len - 1;
  42         src = (char *)src + len - 1;
  43         while (len--) *dst-- = *((char *)src)--;
  44     }
  45     return dest;
  46 }
  47 #endif  /* HAVE_MEMMOVE */