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 #ifdef __EMX__
  13 unsigned int usleep (unsigned int useconds) { DosSleep(useconds); }
  14 #else
  15 unsigned int usleep (unsigned int useconds)
  16 {
  17     struct timeval delay;
  18
  19     delay.tv_sec = 0;
  20     delay.tv_usec = useconds;
  21
  22     select( 0, 0, 0, 0, &delay );
  23     return 0;
  24 }
  25 #endif
  26 #endif /* HAVE_USLEEP */
  27
  28 #ifndef HAVE_MEMMOVE
  29 void *memmove( void *dest, const void *src, unsigned int len )
  30 {
  31     register char *dst = dest;
  32
  33     /* Use memcpy if not overlapping */
  34     if ((dst + len <= (char *)src) || ((char *)src + len <= dst))
  35     {
  36         memcpy( dst, src, len );
  37     }
  38     /* Otherwise do it the hard way (FIXME: could do better than this) */
  39     else if (dst < src)
  40     {
  41         while (len--) *dst++ = *((char *)src)++;
  42     }
  43     else
  44     {
  45         dst += len - 1;
  46         src = (char *)src + len - 1;
  47         while (len--) *dst-- = *((char *)src)--;
  48     }
  49     return dest;
  50 }
  51 #endif  /* HAVE_MEMMOVE */