From 4262c7fd96f54be4530c6ec18e1154faaa9c31af Mon Sep 17 00:00:00 2001
From: Glenn Maynard <gmaynard@users.sourceforge.net>
Date: Wed, 30 Jul 2003 20:31:50 +0000
Subject: [PATCH] Add an SDL random number generator with independent seeds.

---
 stepmania/src/RageUtil.cpp | 14 ++++++++++++++
 stepmania/src/RageUtil.h   | 13 +++++++++----
 2 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/stepmania/src/RageUtil.cpp b/stepmania/src/RageUtil.cpp
index 9e2165c512..704c56bbe2 100644
--- a/stepmania/src/RageUtil.cpp
+++ b/stepmania/src/RageUtil.cpp
@@ -25,6 +25,20 @@
 
 unsigned long randseed = time(NULL);
 
+RandomGen::RandomGen( unsigned long seed_ )
+{
+	seed = seed_;
+	if(seed == 0)
+		seed = time(NULL);
+}
+
+int RandomGen::operator() ( int maximum )
+{
+	seed = 1664525L * seed + 1013904223L;
+	return (seed >> 2) % (maximum + 1);
+}
+
+
 void fapproach( float& val, float other_val, float to_move )
 {
 	ASSERT( to_move >= 0 );
diff --git a/stepmania/src/RageUtil.h b/stepmania/src/RageUtil.h
index e446220302..84a51d74ce 100644
--- a/stepmania/src/RageUtil.h
+++ b/stepmania/src/RageUtil.h
@@ -92,10 +92,15 @@ inline int RandomInt(int nLow, int nHigh)
 	return ((Random() >> 2) % (nHigh - nLow + 1)) + nLow;
 }
 
-// Debug new for memory leak tracing
-//#ifdef _DEBUG
-//#define new new(_NORMAL_BLOCK, __FILE__, __LINE__)
-//#endif
+/* Alternative: */
+class RandomGen
+{
+	unsigned long seed;
+
+public:
+	RandomGen( unsigned long seed = 0 );
+	int operator() ( int maximum = INT_MAX-1 );
+};
 
 
 // Simple function for generating random numbers