kopia lustrzana https://github.com/Dsplib/libdspl-2.0
86 wiersze
1.9 KiB
C
86 wiersze
1.9 KiB
C
/*
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* Copyright (c) 2015-2024 Sergey Bakhurin
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* Digital Signal Processing Library [http://dsplib.org]
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*
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* This file is part of libdspl-2.0.
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*
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* is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* DSPL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Foobar. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <math.h>
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#include <time.h>
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#include "dspl.h"
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#include "randomgen.h"
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#ifdef DOXYGEN_ENGLISH
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#endif
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#ifdef DOXYGEN_RUSSIAN
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#endif
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int randu_mrg32k3a (double* u, int n, random_t* prnd)
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{
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if(!u || !prnd)
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return ERROR_PTR;
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if(n < 1)
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return ERROR_SIZE;
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long z;
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double xn, yn, *x, *y;
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int k;
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x = prnd->mrg32k3a_x;
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y = prnd->mrg32k3a_y;
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for(k = 0; k < n; k++)
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{
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/* Component x[n] */
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xn = MRG32K3A_A12 * x[1] - MRG32K3A_A13 * x[2];
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z = (long)(xn / MRG32K3A_M1);
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xn -= (double)z * MRG32K3A_M1;
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if (xn < 0.0)
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xn += MRG32K3A_M1;
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x[2] = x[1];
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x[1] = x[0];
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x[0] = xn;
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/* Component y[n] */
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yn = MRG32K3A_A21 * y[0] - MRG32K3A_A23 * y[2];
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z = (long)(yn / MRG32K3A_M2);
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yn -= (double)z * MRG32K3A_M2;
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if (yn < 0.0)
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yn += MRG32K3A_M2;
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y[2] = y[1];
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y[1] = y[0];
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y[0] = yn;
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/* Combination */
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u[k] = (xn <= yn) ? ((xn - yn + MRG32K3A_M1) * MRG32K3A_NORM):
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(xn - yn) * MRG32K3A_NORM;
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}
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return RES_OK;
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}
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