ByteBuffer.h

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/*
 * Copyright (c) 2004 X-Way Rights BV
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef _CLASS_BYTEBUFFER_H
#define _CLASS_BYTEBUFFER_H

#ifdef __cplusplus

#include "beecrypt/c++/array.h"
using beecrypt::bytearray;
#include "beecrypt/c++/lang/Comparable.h"
using beecrypt::lang::Comparable;
#include "beecrypt/c++/nio/Buffer.h"
using beecrypt::nio::Buffer;
#include "beecrypt/c++/nio/ByteOrder.h"
using beecrypt::nio::ByteOrder;
#include "beecrypt/c++/nio/ReadOnlyBufferException.h"
using beecrypt::nio::ReadOnlyBufferException;

/* Note: be careful; we have to derive a MappedByteBuffer class from this one
 * (which contains an mmap-ed fd)
 */

namespace beecrypt {
    namespace nio {
        class ByteBuffer : public Buffer, public Comparable<ByteBuffer>
        {
        private:
            class fakebytearray : public bytearray
            {
            public:
                ~fakebytearray();

                void set(byte* data, size_t size) throw ();
            };

            fakebytearray _fake;
            byte* _data;
            bool _free;

            const ByteOrder* _order;

            ByteBuffer(const byte*, size_t);
            ByteBuffer(size_t capacity) throw (std::bad_alloc);

        public:
            virtual ~ByteBuffer();

            static ByteBuffer* allocate(size_t capacity) throw (std::bad_alloc);
            static ByteBuffer* allocateDirect(size_t capacity) throw (std::bad_alloc);

            bytearray& array() throw (ReadOnlyBufferException, UnsupportedOperationException);
            const bytearray& array() const throw (UnsupportedOperationException);
            size_t arrayOffset() const throw (ReadOnlyBufferException, UnsupportedOperationException);

            ByteBuffer* asReadOnlyBuffer();

            virtual bool isDirect() const throw ();
            bool hasArray() const throw ();

            const ByteOrder& order() const throw ();

            virtual int compareTo(const ByteBuffer& compare) const throw ();
        };
    }
}

#endif

#endif