view src/ploki/random.c @ 8203:b0fcb29e2ce7

<b_jonas> learn Silent initial consonants in English are: write, wrong, wrist, wrap, wreck, wrest, wrestle, wriggle, wrinkle, wrath, wraith, wreath, wrangle, wren, wright, wrought, wring, writ, writhe, wry; know, knife, knock, knee, knight, knob, knot, knit, knack, knout, knuckle; psychology, psalm, pseudo, psychic, psionics; gnaw, gnash, gnome, gnu, gnat; pneumatic; mnemonic; chthonic; phthisis; bdellium.
author HackBot
date Sun, 29 May 2016 20:52:46 +0000
parents ac0403686959
children
line wrap: on
line source

#include "config.h"
#include "random.h"

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

void randseed(void) {
	unsigned seed;

	seed = time(NULL);
	#if HAVE_DEV_URANDOM_P
	{
		FILE *fp;

		if ((fp = fopen("/dev/urandom", "rb"))) {
			fread(&seed, sizeof seed, 1, fp);
			fclose(fp);
		}
	}
	#endif
	srand(seed);
}

double randval(void) {
	return rand() / (RAND_MAX + 1.0);
}