MTRand

BeefySysLib/BeefySysLib.vcxproj

@@ -1947,6 +1947,7 @@ copy /y "$(OutDir)$(TargetName).lib" "$(SolutionDir)\BeefLibs\Beefy2D\dist\"</Co
     <ClCompile Include="util\MappedFile.cpp" />
     <ClCompile Include="util\MathUtils.cpp" />
     <ClCompile Include="util\Matrix4.cpp" />
+    <ClCompile Include="util\MTRand.cpp" />
     <ClCompile Include="util\PerfTimer.cpp" />
     <ClCompile Include="util\Point.cpp" />
     <ClCompile Include="util\PolySpline.cpp" />
@@ -2184,6 +2185,7 @@ copy /y "$(OutDir)$(TargetName).lib" "$(SolutionDir)\BeefLibs\Beefy2D\dist\"</Co
     <ClInclude Include="util\MappedFile.h" />
     <ClInclude Include="util\MathUtils.h" />
     <ClInclude Include="util\Matrix4.h" />
+    <ClInclude Include="util\MTRand.h" />
     <ClInclude Include="util\MultiDictionary.h" />
     <ClInclude Include="util\MultiHashSet.h" />
     <ClInclude Include="util\PerfTimer.h" />

BeefySysLib/BeefySysLib.vcxproj.filters

@@ -737,6 +737,9 @@
     <ClCompile Include="third_party\putty\wildcard.c">
       <Filter>src\third_party\putty</Filter>
     </ClCompile>
+    <ClCompile Include="util\MTRand.cpp">
+      <Filter>src\util</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="Common.h">
@@ -1135,6 +1138,9 @@
     <ClInclude Include="util\MultiDictionary.h">
       <Filter>src\util</Filter>
     </ClInclude>
+    <ClInclude Include="util\MTRand.h">
+      <Filter>src\util</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <CustomBuild Include="third_party\libffi\i686-pc-cygwin\src\x86\win32.asm">

BeefySysLib/util/MTRand.cpp

@@ -0,0 +1,157 @@
+/*
+Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+1. Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+
+3. The names of its contributors may not be used to endorse or promote
+products derived from this software without specific prior written
+permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+Any feedback is very welcome.
+http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html
+email: m-mat @ math.sci.hiroshima-u.ac.jp (remove space)
+*/
+
+#include "MTRand.h"
+
+USING_NS_BF;
+
+/* Period parameters */
+#define MTRAND_M 397
+#define MATRIX_A 0x9908b0dfUL   /* constant vector a */
+#define UPPER_MASK 0x80000000UL /* most significant w-r bits */
+#define LOWER_MASK 0x7fffffffUL /* least significant r bits */
+
+/* Tempering parameters */
+#define TEMPERING_MASK_B 0x9d2c5680
+#define TEMPERING_MASK_C 0xefc60000
+#define TEMPERING_SHIFT_U(y)  (y >> 11)
+#define TEMPERING_SHIFT_S(y)  (y << 7)
+#define TEMPERING_SHIFT_T(y)  (y << 15)
+#define TEMPERING_SHIFT_L(y)  (y >> 18)
+
+
+MTRand::MTRand(const std::string& theSerialData)
+{
+	SRand(theSerialData);
+	mti = MTRAND_N + 1; /* mti==MTRAND_N+1 means mt[MTRAND_N] is not initialized */
+}
+
+MTRand::MTRand(unsigned long seed)
+{
+	SRand(seed);
+}
+
+MTRand::MTRand()
+{
+	SRand(4357);
+}
+
+void MTRand::SRand(const std::string& theSerialData)
+{
+	if (theSerialData.size() == MTRAND_N * 4)
+	{
+		memcpy(mt, theSerialData.c_str(), MTRAND_N * 4);
+	}
+	else
+		SRand(4357);
+}
+
+void MTRand::SRand(unsigned long seed)
+{
+	if (seed == 0)
+		seed = 4357;
+
+	/* setting initial seeds to mt[MTRAND_N] using         */
+	/* the generator Line 25 of Table 1 in          */
+	/* [KNUTH 1981, The Art of Computer Programming */
+	/*    Vol. 2 (2nd Ed.), pp102]                  */
+	mt[0] = seed & 0xffffffffUL;
+	for (mti = 1; mti < MTRAND_N; mti++)
+	{
+		mt[mti] =
+			(1812433253UL * (mt[mti - 1] ^ (mt[mti - 1] >> 30)) + mti);
+		/* See Knuth TAOCP Vol2. 3rd Ed. P.106 for multiplier. */
+		/* In the previous versions, MSBs of the seed affect   */
+		/* only MSBs of the array mt[].                        */
+		/* 2002/01/09 modified by Makoto Matsumoto             */
+		mt[mti] &= 0xffffffffUL;
+		/* for >32 bit machines */
+	}
+}
+
+unsigned long MTRand::Next()
+{
+	unsigned long y;
+	static unsigned long mag01[2] = { 0x0, MATRIX_A };
+	/* mag01[x] = x * MATRIX_A  for x=0,1 */
+
+	if (mti >= MTRAND_N) { /* generate MTRAND_N words at one time */
+		int kk;
+
+		for (kk = 0; kk < MTRAND_N - MTRAND_M; kk++) {
+			y = (mt[kk] & UPPER_MASK) | (mt[kk + 1] & LOWER_MASK);
+			mt[kk] = mt[kk + MTRAND_M] ^ (y >> 1) ^ mag01[y & 0x1UL];
+		}
+		for (; kk < MTRAND_N - 1; kk++) {
+			y = (mt[kk] & UPPER_MASK) | (mt[kk + 1] & LOWER_MASK);
+			mt[kk] = mt[kk + (MTRAND_M - MTRAND_N)] ^ (y >> 1) ^ mag01[y & 0x1UL];
+		}
+		y = (mt[MTRAND_N - 1] & UPPER_MASK) | (mt[0] & LOWER_MASK);
+		mt[MTRAND_N - 1] = mt[MTRAND_M - 1] ^ (y >> 1) ^ mag01[y & 0x1UL];
+
+		mti = 0;
+	}
+
+	y = mt[mti++];
+	y ^= TEMPERING_SHIFT_U(y);
+	y ^= TEMPERING_SHIFT_S(y) & TEMPERING_MASK_B;
+	y ^= TEMPERING_SHIFT_T(y) & TEMPERING_MASK_C;
+	y ^= TEMPERING_SHIFT_L(y);
+
+	y &= 0x7FFFFFFF;
+
+	/*char aStr[256];
+	sprintf(aStr, "Rand=%d\r\n", y);
+	OutputDebugString(aStr);*/
+
+	return y;
+}
+
+unsigned long MTRand::Next(unsigned long range)
+{
+	return Next() % range;
+}
+
+String MTRand::Serialize()
+{
+	String aString;
+
+	aString.Append(' ', MTRAND_N * 4);
+	memcpy((char*)aString.c_str(), mt, MTRAND_N * 4);
+
+	return aString;
+}

BeefySysLib/util/MTRand.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include "Common.h"
+
+NS_BF_BEGIN;
+
+#define MTRAND_N 624
+
+class MTRand
+{
+	unsigned long mt[MTRAND_N]; /* the array for the state vector  */
+	int mti;
+
+public:
+	MTRand(const std::string& theSerialData);
+	MTRand(unsigned long seed);
+	MTRand();
+
+	void SRand(const std::string& theSerialData);
+	void SRand(unsigned long seed);	
+	unsigned long Next();	
+	unsigned long Next(unsigned long range);	
+	float Next(float range);
+
+	String Serialize();
+};
+
+NS_BF_END