src/main/decaf/internal/util/ByteArrayAdapter.h

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef _DECAF_INTERNAL_UTIL_BYTEARRAYADAPTER_H_
#define _DECAF_INTERNAL_UTIL_BYTEARRAYADAPTER_H_

#include <decaf/lang/exceptions/InvalidStateException.h>
#include <decaf/lang/exceptions/IllegalArgumentException.h>
#include <decaf/lang/exceptions/IndexOutOfBoundsException.h>
#include <decaf/lang/exceptions/NullPointerException.h>
#include <decaf/nio/BufferUnderflowException.h>
#include <decaf/nio/BufferOverflowException.h>

namespace decaf{
namespace internal{
namespace util{

    class DECAF_API ByteArrayAdapter {
    private:

        // Used to allow this adapter to view its array as the different
        // types it supports
        union Array {
            unsigned char* bytes;
            char* chars;
            short* shorts;
            int* ints;
            long long* longs;
            float* floats;
            double* doubles;
        };

        // Buffer to read and write to, may be shared with other instances.
        Array array;

        // Size of the Buffer
        int size;

        // Whether this object owns the buffer
        bool own;

    public:

        ByteArrayAdapter( int size );

        ByteArrayAdapter( unsigned char* array, int size, bool own = false );

        ByteArrayAdapter( char* array, int size, bool own = false );

        ByteArrayAdapter( double* array, int size, bool own = false );

        ByteArrayAdapter( float* array, int size, bool own = false );

        ByteArrayAdapter( long long* array, int size, bool own = false );

        ByteArrayAdapter( int* array, int size, bool own = false );

        ByteArrayAdapter( short* array, int size, bool own = false );

        virtual ~ByteArrayAdapter();

        virtual int getCapacity() const {
            return this->size;
        }

        virtual int getCharCapacity() const {
            return this->size;
        }

        virtual int getDoubleCapacity() const {
            return this->size / (int)sizeof( double );
        }

        virtual int getFloatCapacity() const {
            return this->size / (int)sizeof( float );
        }

        virtual int getLongCapacity() const {
            return this->size / (int)sizeof( long long );
        }

        virtual int getIntCapacity() const {
            return this->size / (int)sizeof( int );
        }

        virtual int getShortCapacity() const {
            return this->size / (int)sizeof( short );
        }

        virtual unsigned char* getByteArray() {
            return this->array.bytes;
        }

        virtual char* getCharArray() {
            return this->array.chars;
        }

        virtual short* getShortArray() {
            return this->array.shorts;
        }

        virtual int* getIntArray() {
            return this->array.ints;
        }

        virtual long long* getLongArray() {
            return this->array.longs;
        }

        virtual double* getDoubleArray() {
            return this->array.doubles;
        }

        virtual float* getFloatArray() {
            return this->array.floats;
        }

        virtual void read( unsigned char* buffer, int size, int offset, int length ) const;

        virtual void write( unsigned char* buffer, int size, int offset, int length );

        virtual void resize( int size );

        virtual void clear() throw();

        unsigned char& operator[]( int index );
        const unsigned char& operator[]( int index ) const;

        virtual unsigned char get( int index ) const;

        virtual char getChar( int index ) const;

        virtual double getDouble( int index ) const;

        virtual double getDoubleAt( int index ) const;

        virtual float getFloat( int index ) const;

        virtual float getFloatAt( int index ) const;

        virtual long long getLong( int index ) const;

        virtual long long getLongAt( int index ) const;

        virtual int getInt( int index ) const;

        virtual int getIntAt( int index ) const;

        virtual short getShort( int index ) const;

        virtual short getShortAt( int index ) const;

        virtual ByteArrayAdapter& put( int index, unsigned char value );

        virtual ByteArrayAdapter& putChar( int index, char value );

        virtual ByteArrayAdapter& putDouble( int index, double value );

        virtual ByteArrayAdapter& putDoubleAt( int index, double value );

        virtual ByteArrayAdapter& putFloat( int index, float value );

        virtual ByteArrayAdapter& putFloatAt( int index, float value );

        virtual ByteArrayAdapter& putLong( int index, long long value );

        virtual ByteArrayAdapter& putLongAt( int index, long long value );

        virtual ByteArrayAdapter& putInt( int index, int value );

        virtual ByteArrayAdapter& putIntAt( int index, int value );

        virtual ByteArrayAdapter& putShort( int index, short value );

        virtual ByteArrayAdapter& putShortAt( int index, short value );

    private:

        void initialize( unsigned char* buffer, int size, bool own );

    };

}}}

#endif /*_DECAF_INTERNAL_UTIL_BYTEARRAYADAPTER_H_*/