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authortpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2010-01-20 02:37:40 +0000
committertpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2010-01-20 02:37:40 +0000
commit9ad5c7b5e23b4940e7a3ea3ca3a6fb77e6a8fab0 (patch)
treed088b5210e77d9fa91d954d8550e00e372b47378 /libktorrent/mse/bigint.h
downloadktorrent-9ad5c7b5e23b4940e7a3ea3ca3a6fb77e6a8fab0.tar.gz
ktorrent-9ad5c7b5e23b4940e7a3ea3ca3a6fb77e6a8fab0.zip
Updated to final KDE3 ktorrent release (2.2.6)
git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/ktorrent@1077377 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
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+/***************************************************************************
+ * 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. *
+ ***************************************************************************/
+#ifndef MSEBIGINT_H
+#define MSEBIGINT_H
+
+#include <qstring.h>
+#include <util/constants.h>
+#include <stdio.h>
+#include <gmp.h>
+
+using bt::Uint8;
+using bt::Uint16;
+using bt::Uint32;
+using bt::Uint64;
+
+namespace mse
+{
+
+ /**
+ * @author Joris Guisson <joris.guisson@gmail.com>
+ *
+ * Class which can hold an arbitrary large integer. This will be a very important part of our
+ * MSE implementation.
+ */
+ class BigInt
+ {
+ public:
+ /**
+ * Create a big integer, with num_bits bits.
+ * All bits will be set to 0.
+ * @param num_bits The number of bits
+ */
+ BigInt(Uint32 num_bits = 0);
+
+ /**
+ * Create a big integer of a string. The string must be
+ * a hexadecimal representation of an integer. For example :
+ * 12AFFE123488BBBE123
+ *
+ * Letters can be upper or lower case. Invalid chars will create an invalid number.
+ * @param value The hexadecimal representation of the number
+ */
+ BigInt(const QString & value);
+
+ /**
+ * Copy constructor.
+ * @param bi BigInt to copy
+ */
+ BigInt(const BigInt & bi);
+ virtual ~BigInt();
+
+ /**
+ * Assignment operator.
+ * @param bi The BigInt to copy
+ * @return *this
+ */
+ BigInt & operator = (const BigInt & bi);
+
+ /**
+ * Calculates
+ * (x ^ e) mod d
+ * ^ is power
+ */
+ static BigInt powerMod(const BigInt & x,const BigInt & e,const BigInt & d);
+
+ /// Make a random BigInt
+ static BigInt random();
+
+ /// Export the bigint ot a buffer
+ Uint32 toBuffer(Uint8* buf,Uint32 max_size) const;
+
+ /// Make a BigInt out of a buffer
+ static BigInt fromBuffer(const Uint8* buf,Uint32 size);
+
+ private:
+ mpz_t val;
+ };
+
+}
+
+#endif