Mercurial > vba-linux
comparison src/win32/7zip/7z/CPP/7zip/Common/OffsetStream.cpp @ 1:f9f4f1b99eed
importing src directory
author | Robert McIntyre <rlm@mit.edu> |
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date | Sat, 03 Mar 2012 10:31:27 -0600 |
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0:8ced16adf2e1 | 1:f9f4f1b99eed |
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1 // OffsetStream.cpp | |
2 | |
3 #include "StdAfx.h" | |
4 | |
5 #include "Common/Defs.h" | |
6 #include "OffsetStream.h" | |
7 | |
8 HRESULT COffsetOutStream::Init(IOutStream *stream, UInt64 offset) | |
9 { | |
10 _offset = offset; | |
11 _stream = stream; | |
12 return _stream->Seek(offset, STREAM_SEEK_SET, NULL); | |
13 } | |
14 | |
15 STDMETHODIMP COffsetOutStream::Write(const void *data, UInt32 size, UInt32 *processedSize) | |
16 { | |
17 return _stream->Write(data, size, processedSize); | |
18 } | |
19 | |
20 STDMETHODIMP COffsetOutStream::Seek(Int64 offset, UInt32 seekOrigin, | |
21 UInt64 *newPosition) | |
22 { | |
23 UInt64 absoluteNewPosition; | |
24 if (seekOrigin == STREAM_SEEK_SET) | |
25 offset += _offset; | |
26 HRESULT result = _stream->Seek(offset, seekOrigin, &absoluteNewPosition); | |
27 if (newPosition != NULL) | |
28 *newPosition = absoluteNewPosition - _offset; | |
29 return result; | |
30 } | |
31 | |
32 STDMETHODIMP COffsetOutStream::SetSize(Int64 newSize) | |
33 { | |
34 return _stream->SetSize(_offset + newSize); | |
35 } |