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// 7zFolderInStream.cpp
#include "StdAfx.h"
#include "7zFolderInStream.h"
namespace NArchive {
namespace N7z {
CFolderInStream::CFolderInStream()
{
_inStreamWithHashSpec = new CSequentialInStreamWithCRC;
_inStreamWithHash = _inStreamWithHashSpec;
}
void CFolderInStream::Init(IArchiveUpdateCallback *updateCallback,
const UInt32 *fileIndices, UInt32 numFiles)
{
_updateCallback = updateCallback;
_numFiles = numFiles;
_fileIndex = 0;
_fileIndices = fileIndices;
Processed.Clear();
CRCs.Clear();
Sizes.Clear();
_fileIsOpen = false;
_currentSizeIsDefined = false;
}
HRESULT CFolderInStream::OpenStream()
{
_filePos = 0;
while (_fileIndex < _numFiles)
{
_currentSizeIsDefined = false;
CMyComPtr<ISequentialInStream> stream;
HRESULT result = _updateCallback->GetStream(_fileIndices[_fileIndex], &stream);
if (result != S_OK && result != S_FALSE)
return result;
_fileIndex++;
_inStreamWithHashSpec->SetStream(stream);
_inStreamWithHashSpec->Init();
if (!stream)
{
RINOK(_updateCallback->SetOperationResult(NArchive::NUpdate::NOperationResult::kOK));
Sizes.Add(0);
Processed.Add(result == S_OK);
AddDigest();
continue;
}
CMyComPtr<IStreamGetSize> streamGetSize;
if (stream.QueryInterface(IID_IStreamGetSize, &streamGetSize) == S_OK)
{
if(streamGetSize)
{
_currentSizeIsDefined = true;
RINOK(streamGetSize->GetSize(&_currentSize));
}
}
_fileIsOpen = true;
return S_OK;
}
return S_OK;
}
void CFolderInStream::AddDigest()
{
CRCs.Add(_inStreamWithHashSpec->GetCRC());
}
HRESULT CFolderInStream::CloseStream()
{
RINOK(_updateCallback->SetOperationResult(NArchive::NUpdate::NOperationResult::kOK));
_inStreamWithHashSpec->ReleaseStream();
_fileIsOpen = false;
Processed.Add(true);
Sizes.Add(_filePos);
AddDigest();
return S_OK;
}
STDMETHODIMP CFolderInStream::Read(void *data, UInt32 size, UInt32 *processedSize)
{
UInt32 realProcessedSize = 0;
while ((_fileIndex < _numFiles || _fileIsOpen) && size > 0)
{
if (_fileIsOpen)
{
UInt32 localProcessedSize;
RINOK(_inStreamWithHash->Read(
((Byte *)data) + realProcessedSize, size, &localProcessedSize));
if (localProcessedSize == 0)
{
RINOK(CloseStream());
continue;
}
realProcessedSize += localProcessedSize;
_filePos += localProcessedSize;
size -= localProcessedSize;
break;
}
else
{
RINOK(OpenStream());
}
}
if (processedSize != 0)
*processedSize = realProcessedSize;
return S_OK;
}
STDMETHODIMP CFolderInStream::GetSubStreamSize(UInt64 subStream, UInt64 *value)
{
*value = 0;
if (subStream < Sizes.Size())
{
*value= Sizes[(int)(size_t)subStream];
return S_OK;
}
if (subStream > Sizes.Size())
return E_FAIL;
if (!_currentSizeIsDefined)
return S_FALSE;
*value = _currentSize;
return S_OK;
}
}}
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