From 5a422aba704c375a307a902bafe658342e209906 Mon Sep 17 00:00:00 2001
From: scuri <scuri>
Date: Fri, 17 Oct 2008 06:10:15 +0000
Subject: First commit - moving from LuaForge to SourceForge

---
 src/fftw3/kernel/tensor.c | 123 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 src/fftw3/kernel/tensor.c

(limited to 'src/fftw3/kernel/tensor.c')

diff --git a/src/fftw3/kernel/tensor.c b/src/fftw3/kernel/tensor.c
new file mode 100644
index 0000000..1161963
--- /dev/null
+++ b/src/fftw3/kernel/tensor.c
@@ -0,0 +1,123 @@
+/*
+ * 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: tensor.c,v 1.1 2008/10/17 06:11:29 scuri Exp $ */
+
+#include "ifftw.h"
+
+tensor *X(mktensor)(int rnk) 
+{
+     tensor *x;
+
+     A(rnk >= 0);
+
+#if defined(STRUCT_HACK_KR)
+     if (FINITE_RNK(rnk) && rnk > 1)
+	  x = (tensor *)MALLOC(sizeof(tensor) + (rnk - 1) * sizeof(iodim),
+				    TENSORS);
+     else
+	  x = (tensor *)MALLOC(sizeof(tensor), TENSORS);
+#elif defined(STRUCT_HACK_C99)
+     if (FINITE_RNK(rnk))
+	  x = (tensor *)MALLOC(sizeof(tensor) + rnk * sizeof(iodim),
+				    TENSORS);
+     else
+	  x = (tensor *)MALLOC(sizeof(tensor), TENSORS);
+#else
+     x = (tensor *)MALLOC(sizeof(tensor), TENSORS);
+     if (FINITE_RNK(rnk) && rnk > 0)
+          x->dims = (iodim *)MALLOC(sizeof(iodim) * rnk, TENSORS);
+     else
+          x->dims = 0;
+#endif
+
+     x->rnk = rnk;
+     return x;
+}
+
+void X(tensor_destroy)(tensor *sz)
+{
+#if !defined(STRUCT_HACK_C99) && !defined(STRUCT_HACK_KR)
+     X(ifree0)(sz->dims);
+#endif
+     X(ifree)(sz);
+}
+
+int X(tensor_sz)(const tensor *sz)
+{
+     int i, n = 1;
+
+     if (!FINITE_RNK(sz->rnk))
+          return 0;
+
+     for (i = 0; i < sz->rnk; ++i)
+          n *= sz->dims[i].n;
+     return n;
+}
+
+void X(tensor_md5)(md5 *p, const tensor *t)
+{
+     int i;
+     X(md5int)(p, t->rnk);
+     if (FINITE_RNK(t->rnk)) {
+	  for (i = 0; i < t->rnk; ++i) {
+	       const iodim *q = t->dims + i;
+	       X(md5int)(p, q->n);
+	       X(md5int)(p, q->is);
+	       X(md5int)(p, q->os);
+	  }
+     }
+}
+
+/* treat a (rank <= 1)-tensor as a rank-1 tensor, extracting
+   appropriate n, is, and os components */
+int X(tensor_tornk1)(const tensor *t, int *n, int *is, int *os)
+{
+     A(t->rnk <= 1);
+     if (t->rnk == 1) {
+	  const iodim *vd = t->dims;
+          *n = vd[0].n;
+          *is = vd[0].is;
+          *os = vd[0].os;
+     } else {
+          *n = 1;
+          *is = *os = 0;
+     }
+     return 1;
+}
+
+void X(tensor_print)(const tensor *x, printer *p)
+{
+     if (FINITE_RNK(x->rnk)) {
+	  int i;
+	  int first = 1;
+	  p->print(p, "(");
+	  for (i = 0; i < x->rnk; ++i) {
+	       const iodim *d = x->dims + i;
+	       p->print(p, "%s(%d %d %d)", 
+			first ? "" : " ",
+			d->n, d->is, d->os);
+	       first = 0;
+	  }
+	  p->print(p, ")");
+     } else {
+	  p->print(p, "rank-minfty"); 
+     }
+}
-- 
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