a6ad198d09
which avoids a ton of temporary uno::Sequence being created Change-Id: I237bb69395f692bb0272ca0daec05b81af828e01 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/171968 Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk> Tested-by: Jenkins
128 lines
4.1 KiB
C++
128 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_PACKAGE_SOURCE_ZIPAPI_MEMORYBYTEGRABBER_HXX
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#define INCLUDED_PACKAGE_SOURCE_ZIPAPI_MEMORYBYTEGRABBER_HXX
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#include <com/sun/star/uno/Sequence.h>
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class MemoryByteGrabber final
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{
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const sal_Int8 *mpBuffer;
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sal_Int32 mnCurrent, mnEnd;
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public:
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MemoryByteGrabber ( const css::uno::Sequence < sal_Int8 > & rBuffer )
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: mpBuffer ( rBuffer.getConstArray() )
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, mnCurrent ( 0 )
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, mnEnd ( rBuffer.getLength() )
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{
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}
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MemoryByteGrabber ( const sal_Int8* pBuffer, sal_Int32 nBufLen )
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: mpBuffer ( pBuffer )
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, mnCurrent ( 0 )
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, mnEnd ( nBufLen )
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{
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}
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MemoryByteGrabber(css::uno::Sequence<sal_Int8> &&) = delete;
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const sal_Int8 * getCurrentPos () const { return mpBuffer + mnCurrent; }
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sal_Int32 remainingSize() const { return mnEnd - mnCurrent; }
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// XInputStream chained
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/// @throws css::io::NotConnectedException
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/// @throws css::io::BufferSizeExceededException
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/// @throws css::io::IOException
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/// @throws css::uno::RuntimeException
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void skipBytes( sal_Int32 nBytesToSkip )
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{
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mnCurrent += nBytesToSkip;
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}
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sal_Int8 ReadUInt8()
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{
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if (mnCurrent + 1 > mnEnd)
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return 0;
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sal_uInt8 nInt8 = mpBuffer[mnCurrent++];
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return nInt8;
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}
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// XSeekable chained...
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sal_Int16 ReadInt16()
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{
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if (mnCurrent + 2 > mnEnd )
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return 0;
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sal_Int16 nInt16 = mpBuffer[mnCurrent++] & 0xFF;
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nInt16 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8;
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return nInt16;
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}
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sal_Int16 ReadUInt16()
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{
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if (mnCurrent + 2 > mnEnd )
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return 0;
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sal_uInt16 nInt16 = mpBuffer[mnCurrent++] & 0xFF;
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nInt16 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8;
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return nInt16;
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}
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sal_Int32 ReadInt32()
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{
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if (mnCurrent + 4 > mnEnd )
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return 0;
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sal_Int32 nInt32 = mpBuffer[mnCurrent++] & 0xFF;
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nInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8;
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nInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 16;
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nInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 24;
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return nInt32;
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}
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sal_uInt32 ReadUInt32()
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{
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if (mnCurrent + 4 > mnEnd )
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return 0;
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sal_uInt32 nInt32 = mpBuffer [mnCurrent++] & 0xFF;
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nInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 8;
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nInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 16;
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nInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 24;
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return nInt32;
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}
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sal_uInt64 ReadUInt64()
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{
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if (mnCurrent + 8 > mnEnd)
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return 0;
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sal_uInt64 nInt64 = mpBuffer[mnCurrent++] & 0xFF;
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nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 8;
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nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 16;
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nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 24;
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nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 32;
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nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 40;
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nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 48;
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nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 56;
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return nInt64;
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}
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};
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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