PrepackedBuffer.cpp

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/**********************************************************************
** This program is part of 'MOOSE', the
** Messaging Object Oriented Simulation Environment.
**           Copyright (C) 2003-2010 Upinder S. Bhalla. and NCBS
** It is made available under the terms of the
** GNU Lesser General Public License version 2.1
** See the file COPYING.LIB for the full notice.
**********************************************************************/

#include <cstring>
#include "PrepackedBuffer.h"

PrepackedBuffer::PrepackedBuffer(
    const char* data, unsigned int dataSize, unsigned int numEntries )
    : dataSize_( dataSize ), numEntries_( numEntries )
{
    if ( numEntries == 0 )
        individualDataSize_ = dataSize_;
    else
        individualDataSize_ = dataSize_ / numEntries_;

    data_ = new char[ dataSize ];
    memcpy( data_, data, dataSize );
}

PrepackedBuffer::PrepackedBuffer( const PrepackedBuffer& other )
    : dataSize_( other.dataSize_ ),
        numEntries_( other.numEntries_ )
{
    if ( numEntries_ == 0 )
        individualDataSize_ = dataSize_;
    else
        individualDataSize_ = dataSize_ / numEntries_;
    data_ = new char[ dataSize_ ];
    memcpy( data_, other.data_, dataSize_ );
}

PrepackedBuffer::PrepackedBuffer( const char* buf )
    : dataSize_( *reinterpret_cast< const unsigned int * >( buf ) ),
        numEntries_( *reinterpret_cast< const unsigned int * >(
            buf + sizeof( unsigned int ) ) )
{
    if ( numEntries_ == 0 )
        individualDataSize_ = dataSize_;
    else
        individualDataSize_ = dataSize_ / numEntries_;
    data_ = new char[ dataSize_ ];
    memcpy( data_, buf + 2 * sizeof( unsigned int ), dataSize_ );
}

PrepackedBuffer::PrepackedBuffer() // Used to make StrSet happy
    : dataSize_( 0 ), numEntries_( 0 ), individualDataSize_( 0 )
{
    data_ = new char[1];
    data_[0] = '\0';
}

PrepackedBuffer::~PrepackedBuffer()
{
    delete[] data_;
}

const char* PrepackedBuffer::operator[]( unsigned int index ) const
{
    if ( numEntries_ == 0 )
        return data_ ;
    return data_ + ( index % numEntries_ ) * individualDataSize_;
}

unsigned int PrepackedBuffer::conv2buf( char* buf ) const
{
    *reinterpret_cast< unsigned int* >( buf ) = dataSize_;
    buf += sizeof( unsigned int );
    *reinterpret_cast< unsigned int* >( buf ) = numEntries_;
    buf += sizeof( unsigned int );
    memcpy( buf, data_, dataSize_ );
    return size();
}