From 233ffb3b10d9dfcbd01dedcfbfc13382beccff7a Mon Sep 17 00:00:00 2001
From: curt <curt>
Date: Wed, 30 Jul 1997 16:04:08 +0000
Subject: [PATCH] Moved random routines from Utils/ to Math/

---
 Math/Makefile    |  8 +++++-
 Math/fg_random.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++
 Math/fg_random.h | 52 ++++++++++++++++++++++++++++++++++++
 3 files changed, 127 insertions(+), 1 deletion(-)
 create mode 100644 Math/fg_random.c
 create mode 100644 Math/fg_random.h

diff --git a/Math/Makefile b/Math/Makefile
index 4e81cb4a..1eb41076 100644
--- a/Math/Makefile
+++ b/Math/Makefile
@@ -26,7 +26,7 @@
 
 TARGET = libMath.a
 
-CFILES = MAT3geom.c MAT3inv.c MAT3mat.c MAT3vec.c polar.c
+CFILES = MAT3geom.c MAT3inv.c MAT3mat.c MAT3vec.c fg_random.c polar.c
 OFILES = $(CFILES:.c=.o)
 
 
@@ -68,12 +68,18 @@ MAT3mat.o:
 MAT3vec.o:
 	$(CC) $(CFLAGS) -c $< -o $@
 
+fg_random.o:
+	$(CC) $(CFLAGS) -c fg_random.c -o $@
+
 polar.o:
 	$(CC) $(CFLAGS) -c polar.c -o $@
 
 
 #---------------------------------------------------------------------------
 # $Log$
+# Revision 1.11  1997/07/30 16:04:08  curt
+# Moved random routines from Utils/ to Math/
+#
 # Revision 1.10  1997/07/20 02:19:11  curt
 # First stab at a system to generate os2 makefiles automatically.
 #
diff --git a/Math/fg_random.c b/Math/fg_random.c
new file mode 100644
index 00000000..5c212a72
--- /dev/null
+++ b/Math/fg_random.c
@@ -0,0 +1,68 @@
+/**************************************************************************
+ * fg_random.c -- routines to handle random number generation
+ *
+ * Written by Curtis Olson, started July 1997.
+ *
+ * Copyright (C) 1997  Curtis L. Olson  - curt@infoplane.com
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+
+
+#include <stdlib.h>         /* for random(), srandom() */
+#include <time.h>           /* for time() to seed srandom() */        
+
+#include "fg_random.h"
+
+#ifndef USE_RAND
+#  ifdef sgi
+#    undef RAND_MAX
+#    define RAND_MAX 2147483647
+#  endif
+#endif
+
+
+/* Seed the random number generater with time() so we don't see the
+ * same sequence every time */
+void fg_srandom(void) {
+#ifdef USE_RAND
+    srand(time(NULL));
+#else
+    srandom(time(NULL));
+#endif                                       
+}
+
+
+/* return a random number between [0.0, 1.0) */
+double fg_random(void) {
+#ifdef USE_RAND
+    return(rand() / (double)RAND_MAX);
+#else
+    return(random() / (double)RAND_MAX);
+#endif
+}
+
+
+/* $Log$
+/* Revision 1.1  1997/07/30 16:04:09  curt
+/* Moved random routines from Utils/ to Math/
+/*
+ * Revision 1.1  1997/07/19 22:31:57  curt
+ * Initial revision.
+ *
+ */
diff --git a/Math/fg_random.h b/Math/fg_random.h
new file mode 100644
index 00000000..68a19afd
--- /dev/null
+++ b/Math/fg_random.h
@@ -0,0 +1,52 @@
+/**************************************************************************
+ * fg_random.h -- routines to handle random number generation
+ *
+ * Written by Curtis Olson, started July 1997.
+ *
+ * Copyright (C) 1997  Curtis L. Olson  - curt@infoplane.com
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+
+
+#ifndef FG_RANDOM_H
+#define FG_RANDOM_H
+
+
+/* Seed the random number generater with time() so we don't see the
+ * same sequence every time */
+void fg_srandom(void);
+
+/* return a random number between [0.0, 1.0) */
+double fg_random(void);
+
+
+#endif /* FG_RANDOM_H */
+
+
+/* $Log$
+/* Revision 1.1  1997/07/30 16:04:09  curt
+/* Moved random routines from Utils/ to Math/
+/*
+ * Revision 1.2  1997/07/23 21:52:28  curt
+ * Put comments around the text after an #endif for increased portability.
+ *
+ * Revision 1.1  1997/07/19 22:31:57  curt
+ * Initial revision.
+ *
+ */
-- 
2.39.2