--- ray/src/common/random.h	1989/09/26 08:28:53	1.2
+++ ray/src/common/random.h	1991/11/12 16:54:19	2.1
@@ -3,11 +3,28 @@
 /* SCCSid "$SunId$ LBL" */
 
 /*
- *  random.h - header file for random(3) function.
+ *  random.h - header file for random(3) and urand() function.
  *
  *     10/1/85
  */
 
+#ifdef  BSD
+
 extern long  random();
 
 #define  frandom()	(random()*(1./2147483648.))
+
+#else
+
+extern long  lrand48();
+extern double  drand48();
+
+#define  random()	lrand48()
+#define  frandom()	drand48()
+
+#endif
+
+#define  urand(i)	((urperm[(i)&urmask]+frandom())/(urmask+1))
+
+extern short  *urperm;
+extern int  urmask;