Merge commit 'upstream/4.6.1'

[debian/atlc] / src / byteswap.c

diff --git a/src/byteswap.c b/src/byteswap.c
new file mode 100644 (file)
index 0000000..f8b78fc
--- /dev/null
+++ b/src/byteswap.c
@@ -0,0 +1,51 @@
+/* atlc - arbitrary transmission line calculator, for the analysis of
+transmission lines are directional couplers. 
+
+Copyright (C) 2002. Dr. David Kirkby, PhD (G8WRB).
+
+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 package_version 2
+of the License, or (at your option) any later package_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.
+
+Dr. David Kirkby, e-mail drkirkby at gmail.com 
+
+*/
+
+#include "config.h"
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+#include "definitions.h"
+
+extern int errno;
+
+/* This routine swaps data from the little-endian format to the big-endian 
+format or visa-versa. */
+
+void byteswap_doubles(double *a)
+{
+       unsigned char b[8],c[8];
+       (void) memcpy(b,a,8); 
+       c[0]=b[7]; /* swap data around */
+       c[1]=b[6];
+       c[2]=b[5];
+       c[3]=b[4];
+       c[4]=b[3];
+       c[5]=b[2];
+       c[6]=b[1];
+       c[7]=b[0];
+       (void) memcpy(a,c,8);
+}