From 01c8ca3cbfef3a9b590724b0e48477e4e334df1a Mon Sep 17 00:00:00 2001
From: lynxeyed-atsu <lynxeyed@xj9.so-net.ne.jp>
Date: Thu, 28 Jun 2012 22:00:19 +0900
Subject: added randomize using linear congruential method

---
 src/core/arithmetical.cpp | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/core/arithmetical.cpp b/src/core/arithmetical.cpp
index ad90612..194e10b 100755
--- a/src/core/arithmetical.cpp
+++ b/src/core/arithmetical.cpp
@@ -9,9 +9,28 @@ void randomSeed(unsigned int seed)
 	return;
 }
 
+// random algorithm using linear congruential method
+unsigned int random(void)
+{
+	int hi,lo,x;
+
+	x = random_seed;
+
+	if(x == 0)x = 123459876L;
+
+	hi = x / 127773L;
+	lo = x % 127773L;
+	x = 16807L * lo - 2836L * hi;
+
+	if(x < 0)x += 0x7FFFFFFFL;
+	random_seed = x;
+
+	return (x % ((unsigned long int)0x7FFFFFFFL + 1));
+
+}
 
 // random algorithm using Fibonacci-LFSR
-unsigned int random(void)
+unsigned int random_LFSR(void)
 {
     unsigned int shift_bit;
 	shift_bit = (random_seed & 0x0001) ^
-- 
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