newlib/libc/stdlib/lrand48.c

   1 /*
   2  * Copyright (c) 1993 Martin Birgmeier
   3  * All rights reserved.
   4  *
   5  * You may redistribute unmodified or modified versions of this source
   6  * code provided that the above copyright notice and this and the
   7  * following conditions are retained.
   8  *
   9  * This software is provided ``as is'', and comes with no warranties
  10  * of any kind. I shall in no event be liable for anything that happens
  11  * to anyone/anything when using this software.
  12  */
  13
  14 #include "rand48.h"
  15
  16 long
  17 _lrand48_r (struct _reent *r)
  18 {
  19   _REENT_CHECK_RAND48(r);
  20   __dorand48(r, __rand48_seed);
  21   return (long)((unsigned long) __rand48_seed[2] << 15) +
  22     ((unsigned long) __rand48_seed[1] >> 1);
  23 }
  24
  25 #ifndef _REENT_ONLY
  26 long
  27 lrand48 (void)
  28 {
  29   return _lrand48_r (_REENT);
  30 }
  31 #endif /* !_REENT_ONLY */