--- ray/src/common/random.h	1997/12/01 09:55:00	2.5
+++ ray/src/common/random.h	2003/06/06 16:38:47	2.12
@@ -1,18 +1,38 @@
-/* Copyright (c) 1997 Silicon Graphics, Inc. */
-
-/* SCCSid "$SunId$ SGI" */
-
+/* RCSid $Id: random.h,v 2.12 2003/06/06 16:38:47 schorsch Exp $ */
 /*
  *  random.h - header file for random(3) and urand() function.
- *
- *     10/1/85
  */
+#ifndef _RAD_RANDOM_H_
+#define _RAD_RANDOM_H_
+#ifdef __cplusplus
+extern "C" {
+#endif
 
-#ifdef	MSDOS
 
+#include "copyright.h"
+
+#ifdef  NORANDOM
+
+#undef  random
+#define  random()	1073741820
+#undef  srandom
+#define  srandom(s)	(s)
+#define  frandom()	0.5
+#define  urand(i)	0.5
+#define  initurand(n)	(n)
+
+#else
+
+#ifdef	_WIN32
+
+#if (RAND_MAX <= 65536)
 #define random()	((long)rand()<<16^(long)rand()<<6^(long)rand()>>4)
+#else
+#define random()	rand()
+#endif
+#define srandom(s)	srand((unsigned)(s))
 
-#define frandom()	(rand()*(1./32768.))
+#define frandom()	(rand()*(1./RAND_MAX))
 
 #else
 #ifdef	BSD
@@ -27,6 +47,7 @@ extern long  lrand48();
 extern double  drand48();
 
 #define	 random()	lrand48()
+#define  srandom(s)	srand48((long)(s))
 #define	 frandom()	drand48()
 
 #endif
@@ -39,9 +60,26 @@ extern double  drand48();
 
 #else
 
-extern short	*urperm;
-extern int	urmask, initurand();
+extern unsigned short	*urperm;
+extern int	urmask;
 
 #define	 urand(i)	((urperm[(i)&urmask]+frandom())/(urmask+1))
 
 #endif
+
+#endif
+
+				/* defined in urand.c */
+extern int	initurand(int size);
+extern int	ilhash(int *d, int n);
+				/* defined in urind.c */
+extern int	urind(int s, int i);
+				/* defined in multisamp.c */
+extern void	multisamp(double t[], int n, double r);
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _RAD_RANDOM_H_ */
+