2 * Normal distribution table generator
3 * Taken from the uncopyrighted NISTnet code.
11 #include <linux/types.h>
12 #include <linux/pkt_sched.h>
14 #define TABLESIZE 16384
15 #define TABLEFACTOR NETEM_DIST_SCALE
18 normal(double x, double mu, double sigma)
20 return .5 + .5*erf((x-mu)/(sqrt(2.0)*sigma));
25 main(int argc, char **argv)
29 double table[TABLESIZE+1];
31 for (x = -10.0; x < 10.05; x += .00005) {
32 i = rint(TABLESIZE * normal(x, 0.0, 1.0));
37 printf("# This is the distribution table for the normal distribution.\n");
38 for (i = n = 0; i < TABLESIZE; i += 4) {
39 int value = (int) rint(table[i]*TABLEFACTOR);
40 if (value < SHRT_MIN) value = SHRT_MIN;
41 if (value > SHRT_MAX) value = SHRT_MAX;