reactos/lib/crtdll/old cruft/stdlib/swab.c

   1 /* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
   2 #include <msvcrt/stdlib.h>
   3
   4 /*
   5  * @implemented
   6  */
   7 void    _swab (const char* caFrom, char* caTo, size_t sizeToCopy)
   8 {
   9   unsigned long temp;
  10
  11   sizeToCopy >>= 1; sizeToCopy++;
  12 #define STEP    temp = *((const char *)caFrom)++,*((char *)caTo)++ = *((const char *)caFrom)++,*((char *)caTo)++ = temp
  13   /* round to multiple of 8 */
  14   while ((--sizeToCopy) & 07)
  15     STEP;
  16   sizeToCopy >>= 3;
  17   while (--sizeToCopy >= 0) {
  18     STEP; STEP; STEP; STEP;
  19     STEP; STEP; STEP; STEP;
  20   }
  21 }