5 #include "MultiStream.h"
7 STDMETHODIMP CMultiStream::Read(void *data, UInt32 size, UInt32 *processedSize)
9 if(processedSize != NULL)
11 while(_streamIndex < Streams.Size() && size > 0)
13 CSubStreamInfo &s = Streams[_streamIndex];
20 RINOK(s.Stream->Seek(s.Pos + _pos, STREAM_SEEK_SET, 0));
21 UInt32 sizeToRead = UInt32(MyMin((UInt64)size, s.Size - _pos));
23 HRESULT result = s.Stream->Read(data, sizeToRead, &realProcessed);
24 data = (void *)((Byte *)data + realProcessed);
25 size -= realProcessed;
26 if(processedSize != NULL)
27 *processedSize += realProcessed;
28 _pos += realProcessed;
29 _seekPos += realProcessed;
36 STDMETHODIMP CMultiStream::Seek(Int64 offset, UInt32 seekOrigin,
46 newPos = _seekPos + offset;
49 newPos = _totalLength + offset;
52 return STG_E_INVALIDFUNCTION;
55 for (_streamIndex = 0; _streamIndex < Streams.Size(); _streamIndex++)
57 UInt64 size = Streams[_streamIndex].Size;
58 if (newPos < _seekPos + size)
60 _pos = newPos - _seekPos;
63 *newPosition = newPos;
68 if (newPos == _seekPos)
71 *newPosition = newPos;
79 class COutVolumeStream:
80 public ISequentialOutStream,
86 CMyComPtr<ISequentialOutStream> _volumeStream;
94 CUpdateOptions _options;
95 CMyComPtr<IArchiveUpdateCallback2> VolumeCallback;
96 void Init(IArchiveUpdateCallback2 *volumeCallback,
100 _file.IsStartPosDefined = true;
103 VolumeCallback = volumeCallback;
109 STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize);
112 HRESULT COutVolumeStream::Flush()
116 _file.UnPackSize = _curPos;
117 _file.FileCRC = _crc.GetDigest();
118 RINOK(WriteVolumeHeader(_archive, _file, _options));
120 _volumeStream.Release();
121 _file.StartPos += _file.UnPackSize;
128 STDMETHODIMP COutMultiStream::Write(const void *data, UInt32 size, UInt32 *processedSize)
130 if(processedSize != NULL)
134 if (_streamIndex >= Streams.Size())
136 CSubStreamInfo subStream;
137 RINOK(VolumeCallback->GetVolumeSize(Streams.Size(), &subStream.Size));
138 RINOK(VolumeCallback->GetVolumeStream(Streams.Size(), &subStream.Stream));
140 Streams.Add(subStream);
143 CSubStreamInfo &subStream = Streams[_streamIndex];
144 if (_offsetPos >= subStream.Size)
146 _offsetPos -= subStream.Size;
150 if (_offsetPos != subStream.Pos)
152 CMyComPtr<IOutStream> outStream;
153 RINOK(subStream.Stream.QueryInterface(IID_IOutStream, &outStream));
154 RINOK(outStream->Seek(_offsetPos, STREAM_SEEK_SET, NULL));
155 subStream.Pos = _offsetPos;
158 UInt32 curSize = (UInt32)MyMin((UInt64)size, subStream.Size - subStream.Pos);
159 UInt32 realProcessed;
160 RINOK(subStream.Stream->Write(data, curSize, &realProcessed));
161 data = (void *)((Byte *)data + realProcessed);
162 size -= realProcessed;
163 subStream.Pos += realProcessed;
164 _offsetPos += realProcessed;
165 _absPos += realProcessed;
166 if (_absPos > _length)
168 if(processedSize != NULL)
169 *processedSize += realProcessed;
170 if (subStream.Pos == subStream.Size)
175 if (realProcessed != curSize && realProcessed == 0)
181 STDMETHODIMP COutMultiStream::Seek(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition)
184 return STG_E_INVALIDFUNCTION;
187 case STREAM_SEEK_SET:
190 case STREAM_SEEK_CUR:
193 case STREAM_SEEK_END:
194 _absPos = _length + offset;
197 _offsetPos = _absPos;