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/*
* This file is part of the HDRL
* Copyright (C) 2016 European Southern Observatory
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/*-----------------------------------------------------------------------------
Includes
-----------------------------------------------------------------------------*/
#include "hdrl_random.h"
#include <cpl.h>
#include <stdint.h>
#include <math.h>
/*----------------------------------------------------------------------------*/
/**
* @defgroup hdrl_random_test
Testing of hdrl_random module
*/
/*----------------------------------------------------------------------------*/
cpl_error_code test_basic(void)
{
hdrl_random_state * state = hdrl_random_state_new(1, NULL);
const size_t N = 10000;
for (size_t i = 0; i < N; i++) {
int64_t r = hdrl_random_uniform_int64(state, 0, 100);
cpl_test_lt(r, 101);
r = hdrl_random_uniform_int64(state, 1000, 2000);
cpl_test_lt(r, 2001);
cpl_test_lt(999, r);
r = hdrl_random_uniform_int64(state, -(1ll<<55ll), 1ll<<55ll);
cpl_test_lt(r, (1ll<<55ll) + 1);
cpl_test_lt(-(1ll<<55ll) + 1ll, r);
r = hdrl_random_uniform_int64(state, -(1ll<<55ll), 0);
cpl_test_lt(r, 1);
cpl_test_lt(-(1ll<<55ll) + 1ll, r);
double rd = hdrl_random_uniform_double(state, -5., 2.);
cpl_test_lt(rd, nextafter(2., 1));
cpl_test_lt(nextafter(-5., -1), rd);
}
int buf[N];
double bufd[N];
for (size_t i = 0; i < N; i++) {
buf[i] = (int)hdrl_random_poisson(state, 300.);
bufd[i] = hdrl_random_normal(state, 3.5, 1.5);
}
cpl_image * iimg = cpl_image_wrap_int(N, 1, buf);
cpl_image * dimg = cpl_image_wrap_double(N, 1, bufd);
cpl_test_abs(cpl_image_get_mean(iimg), 300, 1);
cpl_test_abs(cpl_image_get_stdev(iimg), sqrt(300), 0.5);
cpl_test_abs(cpl_image_get_mean(dimg), 3.5, 0.1);
cpl_test_abs(cpl_image_get_stdev(dimg), 1.5, 0.1);
cpl_image_unwrap(iimg);
cpl_image_unwrap(dimg);
hdrl_random_state_delete(state);
uint64_t seed[2] = {1342, 232};
state = hdrl_random_state_new(1, seed);
hdrl_random_state_delete(state);
return cpl_error_get_code();
}
/*----------------------------------------------------------------------------*/
/**
@brief Unit tests of hdrl_image
**/
/*----------------------------------------------------------------------------*/
int main(void)
{
cpl_test_init(PACKAGE_BUGREPORT, CPL_MSG_WARNING);
test_basic();
return cpl_test_end(0);
}
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