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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 BTSHA1HASH_H
+#define BTSHA1HASH_H
+
+#include <qcstring.h>
+#include "constants.h"
+
+class QString;
+
+namespace bt
+{
+ class Log;
+
+ /**
+ * @author Joris Guisson
+ * @brief Stores a SHA1 hash
+ *
+ * This class keeps track of a SHA1 hash. A SHA1 hash is a 20 byte
+ * array of bytes.
+ */
+ class SHA1Hash
+ {
+ protected:
+ Uint8 hash[20];
+ public:
+ /**
+ * Constructor, sets every byte in the hash to 0.
+ */
+ SHA1Hash();
+
+ /**
+ * Copy constructor.
+ * @param other Hash to copy
+ */
+ SHA1Hash(const SHA1Hash & other);
+
+ /**
+ * Directly set the hash data.
+ * @param h The hash data must be 20 bytes large
+ */
+ SHA1Hash(const Uint8* h);
+
+ /**
+ * Destructor.
+ */
+ virtual ~SHA1Hash();
+
+ /// Get the idx'th byte of the hash.
+ Uint8 operator [] (const Uint32 idx) const {return idx < 20 ? hash[idx] : 0;}
+
+ /**
+ * Assignment operator.
+ * @param other Hash to copy
+ */
+ SHA1Hash & operator = (const SHA1Hash & other);
+
+ /**
+ * Test wether another hash is equal to this one.
+ * @param other The other hash
+ * @return true if equal, false otherwise
+ */
+ bool operator == (const SHA1Hash & other) const;
+
+ /**
+ * Test wether another hash is not equal to this one.
+ * @param other The other hash
+ * @return true if not equal, false otherwise
+ */
+ bool operator != (const SHA1Hash & other) const {return !operator ==(other);}
+
+ /**
+ * Generate an SHA1 hash from a bunch of data.
+ * @param data The data
+ * @param len Size in bytes of data
+ * @return The generated SHA1 hash
+ */
+ static SHA1Hash generate(const Uint8* data,Uint32 len);
+
+ /**
+ * Convert the hash to a printable string.
+ * @return The string
+ */
+ QString toString() const;
+
+ /**
+ * Convert the hash to a string, usable in http get requests.
+ * @return The string
+ */
+ QString toURLString() const;
+
+ /**
+ * Directly get pointer to the data.
+ * @return The data
+ */
+ const Uint8* getData() const {return hash;}
+
+ /**
+ * Function to print a SHA1Hash to the Log.
+ * @param out The Log
+ * @param h The hash
+ * @return out
+ */
+ friend Log & operator << (Log & out,const SHA1Hash & h);
+
+
+ /**
+ * XOR two SHA1Hashes
+ * @param a The first hash
+ * @param b The second
+ * @return a xor b
+ */
+ friend SHA1Hash operator ^ (const SHA1Hash & a,const SHA1Hash & b);
+
+ /**
+ * Function to compare 2 hashes
+ * @param a The first hash
+ * @param h The second hash
+ * @return wether a is smaller then b
+ */
+ friend bool operator < (const SHA1Hash & a,const SHA1Hash & b);
+
+ /**
+ * Convert the hash to a byte array.
+ */
+ QByteArray toByteArray() const;
+ };
+
+}
+
+#endif