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/*
* Copyright (c) 2003 Matteo Frigo
* Copyright (c) 2003 Massachusetts Institute of Technology
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/* $Id: tensor5.c,v 1.1 2008/10/17 06:11:29 scuri Exp $ */
#include "ifftw.h"
static void dimcpy(iodim *dst, const iodim *src, int rnk)
{
int i;
if (FINITE_RNK(rnk))
for (i = 0; i < rnk; ++i)
dst[i] = src[i];
}
tensor *X(tensor_copy)(const tensor *sz)
{
tensor *x = X(mktensor)(sz->rnk);
dimcpy(x->dims, sz->dims, sz->rnk);
return x;
}
/* like X(tensor_copy), but makes strides in-place by
setting os = is if k == INPLACE_IS or is = os if k == INPLACE_OS. */
tensor *X(tensor_copy_inplace)(const tensor *sz, inplace_kind k)
{
tensor *x = X(tensor_copy)(sz);
if (FINITE_RNK(x->rnk)) {
int i;
if (k == INPLACE_OS)
for (i = 0; i < x->rnk; ++i)
x->dims[i].is = x->dims[i].os;
else
for (i = 0; i < x->rnk; ++i)
x->dims[i].os = x->dims[i].is;
}
return x;
}
/* Like X(tensor_copy), but copy all of the dimensions *except*
except_dim. */
tensor *X(tensor_copy_except)(const tensor *sz, int except_dim)
{
tensor *x;
A(FINITE_RNK(sz->rnk) && sz->rnk >= 1 && except_dim < sz->rnk);
x = X(mktensor)(sz->rnk - 1);
dimcpy(x->dims, sz->dims, except_dim);
dimcpy(x->dims + except_dim, sz->dims + except_dim + 1,
x->rnk - except_dim);
return x;
}
/* Like X(tensor_copy), but copy only rnk dimensions starting
with start_dim. */
tensor *X(tensor_copy_sub)(const tensor *sz, int start_dim, int rnk)
{
tensor *x;
A(FINITE_RNK(sz->rnk) && start_dim + rnk <= sz->rnk);
x = X(mktensor)(rnk);
dimcpy(x->dims, sz->dims + start_dim, rnk);
return x;
}
tensor *X(tensor_append)(const tensor *a, const tensor *b)
{
if (!FINITE_RNK(a->rnk) || !FINITE_RNK(b->rnk)) {
return X(mktensor)(RNK_MINFTY);
} else {
tensor *x = X(mktensor)(a->rnk + b->rnk);
dimcpy(x->dims, a->dims, a->rnk);
dimcpy(x->dims + a->rnk, b->dims, b->rnk);
return x;
}
}
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