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rand.c
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rand.c
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/*
* rand.c
* Copyright (C) 2011 Eric Bakan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "rand.h"
#include "gsl/gsl.h"
#include <time.h>
#include <stdio.h>
const gsl_rng_type* T;
gsl_rng* r;
float randf()
{
return gsl_rng_uniform(r);
}
float randgauss(const float mu, const float sigma)
{
return gsl_ran_gaussian_ziggurat(r,sigma)+mu;
}
void init_rng()
{
gsl_rng_env_setup();
T = gsl_rng_taus;
r = gsl_rng_alloc(T);
gsl_rng_set(r,time(NULL));
}
void free_rng()
{
gsl_rng_free(r);
}