comparison src/fftw-3.3.3/api/mktensor-rowmajor.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 "api.h"
+
+tensor *X(mktensor_rowmajor)(int rnk, const int *n,
+			     const int *niphys, const int *nophys,
+			     int is, int os)
+{
+     tensor *x = X(mktensor)(rnk);
+
+     if (FINITE_RNK(rnk) && rnk > 0) {
+          int i;
+
+          A(n && niphys && nophys);
+          x->dims[rnk - 1].is = is;
+          x->dims[rnk - 1].os = os;
+          x->dims[rnk - 1].n = n[rnk - 1];
+          for (i = rnk - 1; i > 0; --i) {
+               x->dims[i - 1].is = x->dims[i].is * niphys[i];
+               x->dims[i - 1].os = x->dims[i].os * nophys[i];
+               x->dims[i - 1].n = n[i - 1];
+          }
+     }
+     return x;
+}
+
+static int rowmajor_kosherp(int rnk, const int *n)
+{
+     int i;
+
+     if (!FINITE_RNK(rnk)) return 0;
+     if (rnk < 0) return 0;
+
+     for (i = 0; i < rnk; ++i)
+	  if (n[i] <= 0) return 0;
+
+     return 1;
+}
+
+int X(many_kosherp)(int rnk, const int *n, int howmany)
+{
+     return (howmany >= 0) && rowmajor_kosherp(rnk, n);
+}