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128 lines
2.6 KiB
128 lines
2.6 KiB
// InOutTempBuffer.cpp
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#include "StdAfx.h"
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#include "../../../C/7zCrc.h"
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#include "../../Common/Defs.h"
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#include "InOutTempBuffer.h"
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#include "StreamUtils.h"
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using namespace NWindows;
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using namespace NFile;
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using namespace NDir;
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static const size_t kTempBufSize = (1 << 20);
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#define kTempFilePrefixString FTEXT("7zt")
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CInOutTempBuffer::CInOutTempBuffer(): _buf(NULL) { }
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void CInOutTempBuffer::Create()
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{
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if (!_buf)
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_buf = new Byte[kTempBufSize];
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}
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CInOutTempBuffer::~CInOutTempBuffer()
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{
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delete []_buf;
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}
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void CInOutTempBuffer::InitWriting()
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{
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_bufPos = 0;
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_tempFileCreated = false;
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_size = 0;
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_crc = CRC_INIT_VAL;
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}
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bool CInOutTempBuffer::WriteToFile(const void *data, UInt32 size)
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{
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if (size == 0)
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return true;
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if (!_tempFileCreated)
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{
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if (!_tempFile.CreateRandomInTempFolder(kTempFilePrefixString, &_outFile))
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return false;
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_tempFileCreated = true;
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}
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UInt32 processed;
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if (!_outFile.Write(data, size, processed))
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return false;
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_crc = CrcUpdate(_crc, data, processed);
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_size += processed;
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return (processed == size);
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}
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bool CInOutTempBuffer::Write(const void *data, UInt32 size)
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{
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if (size == 0)
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return true;
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size_t cur = kTempBufSize - _bufPos;
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if (cur != 0)
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{
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if (cur > size)
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cur = size;
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memcpy(_buf + _bufPos, data, cur);
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_crc = CrcUpdate(_crc, data, cur);
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_bufPos += cur;
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_size += cur;
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size -= (UInt32)cur;
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data = ((const Byte *)data) + cur;
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}
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return WriteToFile(data, size);
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}
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HRESULT CInOutTempBuffer::WriteToStream(ISequentialOutStream *stream)
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{
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if (!_outFile.Close())
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return E_FAIL;
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UInt64 size = 0;
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UInt32 crc = CRC_INIT_VAL;
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if (_bufPos != 0)
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{
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RINOK(WriteStream(stream, _buf, _bufPos));
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crc = CrcUpdate(crc, _buf, _bufPos);
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size += _bufPos;
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}
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if (_tempFileCreated)
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{
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NIO::CInFile inFile;
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if (!inFile.Open(_tempFile.GetPath()))
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return E_FAIL;
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while (size < _size)
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{
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UInt32 processed;
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if (!inFile.ReadPart(_buf, kTempBufSize, processed))
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return E_FAIL;
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if (processed == 0)
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break;
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RINOK(WriteStream(stream, _buf, processed));
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crc = CrcUpdate(crc, _buf, processed);
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size += processed;
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}
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}
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return (_crc == crc && size == _size) ? S_OK : E_FAIL;
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}
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/*
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STDMETHODIMP CSequentialOutTempBufferImp::Write(const void *data, UInt32 size, UInt32 *processed)
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{
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if (!_buf->Write(data, size))
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{
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if (processed)
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*processed = 0;
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return E_FAIL;
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}
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if (processed)
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*processed = size;
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return S_OK;
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}
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*/
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