Source:NetHack 1.3d/rnd.c

Below is the full text to rnd.c from the source code of NetHack 1.3d. To link to a particular line, write [[NetHack 1.3d/rnd.c#line123]], for example.

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1.    /*	SCCS Id: @(#)rnd.c	1.3	87/07/14
2.    /* rnd.c - version 1.0.2 */
3.    
4.    #define RND(x)	((rand()>>3) % x)
5.    
6.    rn1(x,y)	/* y <= rn1(x,y) < (y+x) */ 
7.    register x,y;
8.    {
9.    	return(RND(x)+y);
10.   }
11.   
12.   rn2(x)		/* 0 <= rn2(x) < x */
13.   register x;
14.   {
15.   	return(RND(x));
16.   }
17.   
18.   rnd(x)		/* 1 <= rnd(x) <= x */
19.   register x;
20.   {
21.   	return(RND(x)+1);
22.   }
23.   
24.   d(n,x)		/* n <= d(n,x) <= (n*x) */
25.   register n,x;
26.   {
27.   	register tmp = n;
28.   
29.   	while(n--) tmp += RND(x);
30.   	return(tmp);
31.   }