src/sn_{comparator,network,random,stage}.[ch]: Change license to LGPLv2.1+.

[sort-networks.git] / src / sn_random.c

diff --git a/src/sn_random.c b/src/sn_random.c
index c67b451..17bb6e9 100644 (file)
--- a/src/sn_random.c
+++ b/src/sn_random.c
@@ -1,5 +1,31 @@
-#define _ISOC99_SOURCE
-#define _POSIX_C_SOURCE 200112L
+/**
+ * libsortnetwork - src/sn_random.c
+ * Copyright (C) 2008-2010  Florian octo Forster
+ *
+ * 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
+ *
+ * Authors:
+ *   Florian octo Forster <ff at octo.it>
+ **/
+
+#ifndef _ISOC99_SOURCE
+# define _ISOC99_SOURCE
+#endif
+#ifndef _POSIX_C_SOURCE
+# define _POSIX_C_SOURCE 200112L
+#endif
 
 #include <stdlib.h>
 #include <stdio.h>
@@ -119,4 +145,9 @@ int sn_bounded_random (int min, int max)
   return (rand);
 } /* int sn_bounded_random */
 
+double sn_double_random (void)
+{
+  return (((double) sn_random ()) / (((double) RAND_MAX) + 1.0));
+} /* double sn_double_random */
+
 /* vim: set shiftwidth=2 softtabstop=2 : */