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// 7zFolderInStream.cpp
#include "StdAfx.h"
#include "7zFolderInStream.h"
namespace NArchive {
namespace N7z {
void CFolderInStream::Init(IArchiveUpdateCallback *updateCallback,
const UInt32 *indexes, unsigned numFiles)
{
_updateCallback = updateCallback;
_indexes = indexes;
_numFiles = numFiles;
_index = 0;
Processed.ClearAndReserve(numFiles);
CRCs.ClearAndReserve(numFiles);
Sizes.ClearAndReserve(numFiles);
_pos = 0;
_crc = CRC_INIT_VAL;
_size_Defined = false;
_size = 0;
_stream.Release();
}
HRESULT CFolderInStream::OpenStream()
{
_pos = 0;
_crc = CRC_INIT_VAL;
_size_Defined = false;
_size = 0;
while (_index < _numFiles)
{
CMyComPtr<ISequentialInStream> stream;
HRESULT result = _updateCallback->GetStream(_indexes[_index], &stream);
if (result != S_OK)
{
if (result != S_FALSE)
return result;
}
_stream = stream;
if (stream)
{
CMyComPtr<IStreamGetSize> streamGetSize;
stream.QueryInterface(IID_IStreamGetSize, &streamGetSize);
if (streamGetSize)
{
if (streamGetSize->GetSize(&_size) == S_OK)
_size_Defined = true;
}
return S_OK;
}
_index++;
RINOK(_updateCallback->SetOperationResult(NArchive::NUpdate::NOperationResult::kOK));
AddFileInfo(result == S_OK);
}
return S_OK;
}
void CFolderInStream::AddFileInfo(bool isProcessed)
{
Processed.Add(isProcessed);
Sizes.Add(_pos);
CRCs.Add(CRC_GET_DIGEST(_crc));
}
STDMETHODIMP CFolderInStream::Read(void *data, UInt32 size, UInt32 *processedSize)
{
if (processedSize)
*processedSize = 0;
while (size != 0)
{
if (_stream)
{
UInt32 cur = size;
const UInt32 kMax = (UInt32)1 << 20;
if (cur > kMax)
cur = kMax;
RINOK(_stream->Read(data, cur, &cur));
if (cur != 0)
{
_crc = CrcUpdate(_crc, data, cur);
_pos += cur;
if (processedSize)
*processedSize = cur;
return S_OK;
}
_stream.Release();
_index++;
AddFileInfo(true);
_pos = 0;
_crc = CRC_INIT_VAL;
_size_Defined = false;
_size = 0;
RINOK(_updateCallback->SetOperationResult(NArchive::NUpdate::NOperationResult::kOK));
}
if (_index >= _numFiles)
break;
RINOK(OpenStream());
}
return S_OK;
}
STDMETHODIMP CFolderInStream::GetSubStreamSize(UInt64 subStream, UInt64 *value)
{
*value = 0;
if (subStream > Sizes.Size())
return S_FALSE; // E_FAIL;
unsigned index = (unsigned)subStream;
if (index < Sizes.Size())
{
*value = Sizes[index];
return S_OK;
}
if (!_size_Defined)
{
*value = _pos;
return S_FALSE;
}
*value = (_pos > _size ? _pos : _size);
return S_OK;
}
}}
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