/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 * This file is part of the LibreOffice project.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 *

 * This file incorporates work covered by the following license notice:

 *

 *   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 .

 */

#include <ZipPackageBuffer.hxx>

#include <PackageConstants.hxx>

#include <algorithm>

#include <string.h>

#include <sal/log.hxx>

#include <com/sun/star/io/BufferSizeExceededException.hpp>

#include <com/sun/star/lang/IllegalArgumentException.hpp>

using namespace ::com::sun::star;

using namespace com::sun::star::uno;

using namespace com::sun::star::io;

using com::sun::star::lang::IllegalArgumentException;

ZipPackageBuffer::ZipPackageBuffer()

: m_nBufferSize (n_ConstBufferSize)

, m_nEnd(0)

, m_nCurrent(0)

, m_bMustInitBuffer ( true )

{

}

ZipPackageBuffer::~ZipPackageBuffer()

{

}

sal_Int32 SAL_CALL ZipPackageBuffer::readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )

{

    if (nBytesToRead < 0)

        throw BufferSizeExceededException(u""_ustr, *this );

    if (nBytesToRead + m_nCurrent > m_nEnd)

        nBytesToRead = static_cast < sal_Int32 > (m_nEnd - m_nCurrent);

    aData.realloc ( nBytesToRead );

    std::copy_n(m_aBuffer.getConstArray() + m_nCurrent, nBytesToRead, aData.getArray());

    m_nCurrent +=nBytesToRead;

    return nBytesToRead;

}

sal_Int32 SAL_CALL ZipPackageBuffer::readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )

{

    return readBytes(aData, nMaxBytesToRead);

}

void SAL_CALL ZipPackageBuffer::skipBytes( sal_Int32 nBytesToSkip )

{

    if (nBytesToSkip < 0)

        throw BufferSizeExceededException(u""_ustr, *this );

    if (nBytesToSkip + m_nCurrent > m_nEnd)

        nBytesToSkip = static_cast < sal_Int32 > (m_nEnd - m_nCurrent);

    m_nCurrent+=nBytesToSkip;

}

sal_Int32 SAL_CALL ZipPackageBuffer::available(  )

{

    return std::min<sal_Int64>(SAL_MAX_INT32, m_nEnd - m_nCurrent);

}

void SAL_CALL ZipPackageBuffer::closeInput(  )

{

}

void SAL_CALL ZipPackageBuffer::writeBytes( const Sequence< sal_Int8 >& aData )

{

    sal_Int64 nDataLen = aData.getLength(), nCombined = m_nEnd + nDataLen;

    if ( nCombined > m_nBufferSize)

    {

        do

            m_nBufferSize *=2;

        while (nCombined > m_nBufferSize);

        m_aBuffer.realloc(static_cast < sal_Int32 > (m_nBufferSize));

        m_bMustInitBuffer = false;

    }

    else if (m_bMustInitBuffer)

    {

        m_aBuffer.realloc ( static_cast < sal_Int32 > ( m_nBufferSize ) );

        m_bMustInitBuffer = false;

    }

    std::copy_n(aData.getConstArray(), static_cast<sal_Int32>(nDataLen),

                m_aBuffer.getArray() + m_nCurrent);

    m_nCurrent+=nDataLen;

    if (m_nCurrent>m_nEnd)

        m_nEnd = m_nCurrent;

}

void SAL_CALL ZipPackageBuffer::flush(  )

{

}

void SAL_CALL ZipPackageBuffer::closeOutput(  )

{

}

void SAL_CALL ZipPackageBuffer::seek( sal_Int64 location )

{

    if ( location > m_nEnd || location < 0 )

        throw IllegalArgumentException(u""_ustr, uno::Reference< uno::XInterface >(), 1 );

    m_nCurrent = location;

}

sal_Int64 SAL_CALL ZipPackageBuffer::getPosition(  )

{

    return m_nCurrent;

}

sal_Int64 SAL_CALL ZipPackageBuffer::getLength(  )

{

    return m_nEnd;

}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */