*/
#ifndef lint
-static char rcsid[] = "$Id: magic.c,v 1.3 1994/09/21 06:47:37 paulus Exp $";
+static char rcsid[] = "$Id: magic.c,v 1.4 1995/04/24 05:57:01 paulus Exp $";
#endif
#include <stdio.h>
static u_int32_t next; /* Next value to return */
-extern u_int32_t gethostid __P((void));
-extern long random __P((void));
-extern void srandom __P((int));
+extern int gethostid __P((void));
+extern long mrand48 __P((void));
+extern void srand48 __P((long));
/*
* magic_init - Initialize the magic number generator.
*
- * Computes first magic number and seed for random number generator.
* Attempts to compute a random number seed which will not repeat.
- * The current method uses the current hostid and current time.
+ * The current method uses the current hostid and current time, currently.
*/
-void magic_init()
+void
+magic_init()
{
- struct timeval tv;
+ long seed;
- next = gethostid();
- if (gettimeofday(&tv, NULL)) {
- perror("gettimeofday");
- exit(1);
- }
- next ^= (u_int32_t) tv.tv_sec ^ (u_int32_t) tv.tv_usec;
-
- srandom((int) next);
+ seed = gethostid() ^ time(NULL);
+ srand48(seed);
}
-
/*
* magic - Returns the next magic number.
*/
-u_int32_t magic()
+u_int32_t
+magic()
{
- u_int32_t m;
+ return (u_int32_t) mrand48();
+}
+
+#ifdef NO_DRAND48
+/*
+ * Substitute procedures for those systems which don't have
+ * drand48 et al.
+ */
- m = next;
- next = (u_int32_t) random();
- return (m);
+double
+drand48()
+{
+ return (double)random() / (double)0x7fffffffL; /* 2**31-1 */
}
+
+long
+mrand48()
+{
+ return random();
+}
+
+void
+srand48(seedval)
+long seedval;
+{
+ srandom((int)seedval);
+}
+
+#endif