-#ifdef ZX81_RNG
-/*
- * This is my favorite tiny RNG, If you had a ZX81 you may recognise it :-)
- * (RdeBath)
- */
+/* rand.c
+ *
+ * Written by Erik Andersen <andersee@debian.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; see the file COPYING.LIB. If not,
+ * write to the Free Software Foundation, Inc., 675 Mass Ave,
+ * Cambridge, MA 02139, USA. */
#include <stdlib.h>
-#define MAXINT (((unsigned)-1)>>1)
+libc_hidden_proto(random)
-static unsigned int sseed = 0;
-
-int rand()
-{
- return ( sseed = (((sseed+1L)*75L)%65537L)-1 ) & MAXINT;
-}
-
-void srand(seed)
-unsigned int seed;
-{
- sseed=seed;
-}
-
-#else
-
-/*
- * This generator is a combination of three linear congruential generators
- * with periods or 2^15-405, 2^15-1041 and 2^15-1111. It has a period that
- * is the product of these three numbers.
- */
-
-static int seed1 = 1;
-static int seed2 = 1;
-static int seed3 = 1;
-#define MAXINT (((unsigned)-1)>>1)
-
-#define CRANK(a,b,c,m,s) \
- q = s/a; \
- s = b*(s-a*q) - c*q; \
- if(s<0) s+=m;
-
-int rand()
-{
- register int q, z;
- CRANK(206, 157, 31, 32363, seed1);
- CRANK(217, 146, 45, 31727, seed2);
- CRANK(222, 142, 133, 31657, seed3);
-
- return seed1^seed2^seed3;
-}
-
-void srand(seed)
-unsigned int seed;
+int rand (void)
{
- seed &= MAXINT;
- seed1= seed%32362 + 1;
- seed2= seed%31726 + 1;
- seed3= seed%31656 + 1;
+ return((int)random());
}
-#endif