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/* -*- 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 .
*/
#ifndef INCLUDED_PACKAGE_SOURCE_ZIPAPI_MEMORYBYTEGRABBER_HXX
#define INCLUDED_PACKAGE_SOURCE_ZIPAPI_MEMORYBYTEGRABBER_HXX
#include <com/sun/star/uno/Sequence.h>
class MemoryByteGrabber final
{
const sal_Int8 *mpBuffer;
sal_Int32 mnCurrent, mnEnd;
public:
MemoryByteGrabber ( const css::uno::Sequence < sal_Int8 > & rBuffer )
: mpBuffer ( rBuffer.getConstArray() )
, mnCurrent ( 0 )
, mnEnd ( rBuffer.getLength() )
{
}
MemoryByteGrabber(css::uno::Sequence<sal_Int8> &&) = delete;
const sal_Int8 * getCurrentPos () const { return mpBuffer + mnCurrent; }
sal_Int32 remainingSize() const { return mnEnd - mnCurrent; }
// XInputStream chained
/// @throws css::io::NotConnectedException
/// @throws css::io::BufferSizeExceededException
/// @throws css::io::IOException
/// @throws css::uno::RuntimeException
void skipBytes( sal_Int32 nBytesToSkip )
{
mnCurrent += nBytesToSkip;
}
// XSeekable chained...
sal_Int16 ReadInt16()
{
if (mnCurrent + 2 > mnEnd )
return 0;
sal_Int16 nInt16 = mpBuffer[mnCurrent++] & 0xFF;
nInt16 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8;
return nInt16;
}
sal_Int16 ReadUInt16()
{
if (mnCurrent + 2 > mnEnd )
return 0;
sal_uInt16 nInt16 = mpBuffer[mnCurrent++] & 0xFF;
nInt16 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8;
return nInt16;
}
sal_Int32 ReadInt32()
{
if (mnCurrent + 4 > mnEnd )
return 0;
sal_Int32 nInt32 = mpBuffer[mnCurrent++] & 0xFF;
nInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8;
nInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 16;
nInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 24;
return nInt32;
}
sal_uInt32 ReadUInt32()
{
if (mnCurrent + 4 > mnEnd )
return 0;
sal_uInt32 nInt32 = mpBuffer [mnCurrent++] & 0xFF;
nInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 8;
nInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 16;
nInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 24;
return nInt32;
}
sal_Int64 ReadInt64()
{
if (mnCurrent + 8 > mnEnd)
return 0;
sal_Int64 nInt64 = mpBuffer[mnCurrent++] & 0xFF;
nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 8;
nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 16;
nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 24;
nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 32;
nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 40;
nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 48;
nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 56;
return nInt64;
}
sal_uInt64 ReadUInt64()
{
if (mnCurrent + 8 > mnEnd)
return 0;
sal_uInt64 nInt64 = mpBuffer[mnCurrent++] & 0xFF;
nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 8;
nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 16;
nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 24;
nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 32;
nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 40;
nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 48;
nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 56;
return nInt64;
}
};
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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