1 files changed, 36 insertions, 0 deletions
diff --git a/src/fftw3/api/extract-reim.c b/src/fftw3/api/extract-reim.c
new file mode 100644
index 0000000..3a90ab5
--- /dev/null
+++ b/src/fftw3/api/extract-reim.c
@@ -0,0 +1,36 @@
+/*
+ * 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
+ *
+ */
+
+#include "api.h"
+
+/* decompose complex pointer into real and imaginary parts.
+   Flip real and imaginary if there the sign does not match
+   FFTW's idea of what the sign should be */
+
+void X(extract_reim)(int sign, C *c, R **r, R **i)
+{
+     if (sign == FFT_SIGN) {
+          *r = c[0] + 0;
+          *i = c[0] + 1;
+     } else {
+          *r = c[0] + 1;
+          *i = c[0] + 0;
+     }
+}