Added constants for doing unit conversions.

src/Makefile.am

@@ -7,6 +7,7 @@ libdivecomputer_HEADERS = 	\
 	utils.h \
 	device.h \
 	parser.h \
+	units.h \
 	suunto.h \
 	suunto_eon.h \
 	suunto_vyper.h \

src/units.h

@@ -0,0 +1,34 @@
+/* 
+ * libdivecomputer
+ * 
+ * Copyright (C) 2008 Jef Driesen
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ * 
+ * This library 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
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#ifndef UNITS_H
+#define UNITS_H
+
+
+#define FEET        0.3048
+#define GRAVITY     9.80665
+#define ATM         101325.0
+#define BAR         100000.0
+#define FSW         (ATM / 33.0)
+#define MSW         (BAR / 10.0)
+
+
+#endif /* UNITS_H */