2 * random.c - functions to get random values
11 /* global & extern variables */
12 extern u32 sum_z_segments;
15 /* return random integer between 0 - max */
19 if(read(random_fd,&rand_int,4)!=4)
21 puts("failed reading 4 bytes of random data");
24 /* segments numbered 0...max-1 */
25 return((u32)(rand_int*(max*1.0/URAND_MAX)));
28 /* get z value (linear growth of probability with depths) */
29 u32 rand_get_lgp(int slope_nel,int start_nel) {
32 z=rand_get(sum_z_segments)+1; /* +1 as rand_get returns values 0...max-1 */
34 z-=(start_nel+i*slope_nel);
37 return(i-1); /* return values 0...z_seg-1 */