1 files changed, 100 insertions, 0 deletions
diff --git a/libktorrent/mse/bigint.cpp b/libktorrent/mse/bigint.cpp
new file mode 100644
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+++ b/libktorrent/mse/bigint.cpp
@@ -0,0 +1,100 @@
+/***************************************************************************
+ *   Copyright (C) 2005 by Joris Guisson                                   *
+ *   joris.guisson@gmail.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.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.             *
+ ***************************************************************************/
+#include <time.h>
+#include <string.h>
+#include <stdlib.h>
+#include <util/log.h>
+#include <util/functions.h>
+#include <torrent/globals.h>
+#include "bigint.h"
+
+using namespace bt;
+
+namespace mse
+{
+
+
+	BigInt::BigInt(Uint32 num_bits)
+	{
+		mpz_init2(val,num_bits);	
+	}
+		
+	BigInt::BigInt(const QString & value)
+	{
+		mpz_init2(val,(value.length() - 2)*4);
+		mpz_set_str(val,value.ascii(),0);	
+	}
+		
+	BigInt::BigInt(const BigInt & bi)
+	{
+		mpz_set(val,bi.val);
+	}
+	
+	BigInt::~BigInt()
+	{
+		mpz_clear(val);
+	}
+	
+	
+	BigInt & BigInt::operator = (const BigInt & bi)
+	{
+		mpz_set(val,bi.val);
+		return *this;
+	}
+	
+	BigInt BigInt::powerMod(const BigInt & x,const BigInt & e,const BigInt & d)
+	{
+		BigInt r;
+		mpz_powm(r.val,x.val,e.val,d.val);
+		return r;
+	}
+	
+	BigInt BigInt::random()
+	{
+		static Uint32 rnd = 0;
+		if (rnd % 10 == 0)
+		{
+			TimeStamp now = bt::GetCurrentTime();
+			srand(now);
+			rnd = 0;
+		}
+		rnd++;
+		Uint8 tmp[20];
+		for (Uint32 i = 0;i < 20;i++)
+			tmp[i] = (Uint8)rand() % 0x100;
+		
+		return BigInt::fromBuffer(tmp,20);
+	}
+
+	Uint32 BigInt::toBuffer(Uint8* buf,Uint32 max_size) const
+	{
+		size_t foo;
+		mpz_export(buf,&foo,1,1,1,0,val);
+		return foo;
+	}
+	
+	BigInt BigInt::fromBuffer(const Uint8* buf,Uint32 size)
+	{
+		BigInt r(size*8);
+		mpz_import(r.val,size,1,1,1,0,buf);
+		return r;
+	}
+	
+}