comparison src/fftw-3.3.3/kernel/tensor5.c @ 10:37bf6b4a2645

Add FFTW3

+/*
+ * Copyright (c) 2003, 2007-11 Matteo Frigo
+ * Copyright (c) 2003, 2007-11 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+
+#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;
+     }
+}