SaraP
140 lines
3.8 KiB
C++
140 lines
3.8 KiB
C++
/*++
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Copyright (C) 2019 3MF Consortium
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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Abstract:
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NMR_ImportStream_Memory.cpp implements the CImportStream_Memory Class.
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This is an abstract platform independent class for keeping data in a memory stream.
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--*/
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#include "Common/Platform/NMR_ImportStream_Memory.h"
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#include "Common/Platform/NMR_Platform.h"
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#include "Common/NMR_Exception.h"
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#include "Common/NMR_Exception_Windows.h"
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#include "Common/NMR_StringUtils.h"
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#include <string>
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namespace NMR {
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CImportStream_Memory::~CImportStream_Memory()
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{
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}
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nfBool CImportStream_Memory::seekPosition(_In_ nfUint64 nPosition, _In_ nfBool bHasToSucceed)
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{
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if (nPosition > m_cbSize) {
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if (bHasToSucceed)
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throw CNMRException(NMR_ERROR_COULDNOTSEEKSTREAM);
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return false;
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}
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m_nPosition = nPosition;
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return true;
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}
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nfBool CImportStream_Memory::seekForward(_In_ nfUint64 cbBytes, _In_ nfBool bHasToSucceed)
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{
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nfUint64 nPosition = m_nPosition + cbBytes;
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if (nPosition > m_cbSize) {
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if (bHasToSucceed)
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throw CNMRException(NMR_ERROR_COULDNOTSEEKSTREAM);
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return false;
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}
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m_nPosition = nPosition;
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return true;
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}
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nfBool CImportStream_Memory::seekFromEnd(_In_ nfUint64 cbBytes, _In_ nfBool bHasToSucceed)
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{
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if (cbBytes > m_cbSize) {
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if (bHasToSucceed)
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throw CNMRException(NMR_ERROR_COULDNOTSEEKSTREAM);
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return false;
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}
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m_nPosition = m_cbSize - cbBytes;
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return true;
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}
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nfUint64 CImportStream_Memory::getPosition()
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{
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return m_nPosition;
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}
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nfUint64 CImportStream_Memory::readIntoBuffer(_In_ nfByte * pBuffer, _In_ nfUint64 cbTotalBytesToRead, nfBool bNeedsToReadAll)
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{
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__NMRASSERT(m_nPosition <= m_cbSize);
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nfUint64 cbBytesLeft = (m_cbSize - m_nPosition);
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nfUint64 cbBytesToRead = cbTotalBytesToRead;
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if (cbBytesToRead > cbBytesLeft)
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cbBytesToRead = cbBytesLeft;
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if (cbBytesToRead > 0) {
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nfUint64 nIndex = cbBytesToRead;
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const nfByte * pSource = getAt(m_nPosition);
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nfByte * pTarget = pBuffer;
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while (nIndex > 0) {
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*pTarget = *pSource;
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nIndex--;
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pSource++;
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pTarget++;
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}
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m_nPosition += cbBytesToRead;
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}
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if ((cbBytesToRead != cbTotalBytesToRead) && bNeedsToReadAll)
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throw CNMRException(NMR_ERROR_COULDNOTREADFULLDATA);
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return cbBytesToRead;
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}
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nfUint64 CImportStream_Memory::retrieveSize()
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{
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return m_cbSize;
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}
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void CImportStream_Memory::writeToFile(_In_ const nfWChar * pwszFileName)
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{
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if (pwszFileName == nullptr)
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throw CNMRException(NMR_ERROR_INVALIDPARAM);
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std::string sUTF8FileName = fnUTF16toUTF8(pwszFileName);
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PExportStream pExportStream = fnCreateExportStreamInstance(sUTF8FileName.c_str());
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if (m_cbSize > 0) {
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pExportStream->writeBuffer(getAt(0), m_cbSize);
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}
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}
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}
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