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1 /*
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2 * Copyright (c) 2003, 2007-14 Matteo Frigo
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3 * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
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4 *
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5 * This program is free software; you can redistribute it and/or modify
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6 * it under the terms of the GNU General Public License as published by
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7 * the Free Software Foundation; either version 2 of the License, or
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8 * (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program; if not, write to the Free Software
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17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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18 *
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19 */
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20
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21 #include <string.h>
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22 #include "api.h"
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23
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24 const int *X(rdft2_pad)(int rnk, const int *n, const int *nembed,
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25 int inplace, int cmplx, int **nfree)
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26 {
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27 A(FINITE_RNK(rnk));
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28 *nfree = 0;
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29 if (!nembed && rnk > 0) {
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30 if (inplace || cmplx) {
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31 int *np = (int *) MALLOC(sizeof(int) * (unsigned)rnk, PROBLEMS);
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32 memcpy(np, n, sizeof(int) * (unsigned)rnk);
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33 np[rnk - 1] = (n[rnk - 1] / 2 + 1) * (1 + !cmplx);
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34 nembed = *nfree = np;
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35 } else
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36 nembed = n;
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37 }
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38 return nembed;
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39 }
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