dspl/randu_8c_source.html

/*

* Copyright (c) 2015-2024 Sergey Bakhurin

* Digital Signal Processing Library [http://dsplib.org]

*

* This file is part of libdspl-2.0.

*

* is free software: you can redistribute it and/or modify

* it under the terms of the GNU Lesser    General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* DSPL 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 Lesser General Public License

* along with Foobar.    If not, see <http://www.gnu.org/licenses/>.

*/


#include <stdlib.h>

#include <math.h>

#include <time.h>


#include "dspl.h"

#include "randomgen.h"


#ifdef DOXYGEN_ENGLISH


#endif

#ifdef DOXYGEN_RUSSIAN


#endif

int DSPL_API randu(double* x, int n, random_t* prnd)

{

    int i;


    if(!x)

        return ERROR_PTR;

    if(n < 0)

        return ERROR_SIZE;


    if(prnd)

    {

        switch(prnd->type)

        {

            case RAND_TYPE_MRG32K3A:

                return randu_mrg32k3a(x, n, prnd);

            case RAND_TYPE_MT19937:

                for(i = 0; i < n; i++)

                    x[i] = mt19937_genrand64_real1(prnd);

                return RES_OK;

            default:

                return ERROR_RAND_TYPE;

        }

    }

    else

    {

        if(!x)

            return ERROR_PTR;

        if(n<1)

            return ERROR_SIZE;

        for(i = 0; i < n; i++)

            x[i] = (double)rand()/RAND_MAX;

    }


    return RES_OK;

}