X-Git-Url: http://git.maemo.org/git/?a=blobdiff_plain;f=lzma%2FCPP%2F7zip%2FCommon%2FOffsetStream.cpp;fp=lzma%2FCPP%2F7zip%2FCommon%2FOffsetStream.cpp;h=997ccae2ff64a29154fc8ab9b011c7277c730ea6;hb=1a2e54b98aaab3669eebd38facb83687c4ac7baf;hp=0000000000000000000000000000000000000000;hpb=0b9bdac28929054558b5d7f315403fe3399a1413;p=physicsfs

diff --git a/lzma/CPP/7zip/Common/OffsetStream.cpp b/lzma/CPP/7zip/Common/OffsetStream.cpp
new file mode 100644
index 0000000..997ccae
--- /dev/null
+++ b/lzma/CPP/7zip/Common/OffsetStream.cpp
@@ -0,0 +1,35 @@
+// OffsetStream.cpp
+
+#include "StdAfx.h"
+
+#include "Common/Defs.h"
+#include "OffsetStream.h"
+
+HRESULT COffsetOutStream::Init(IOutStream *stream, UInt64 offset)
+{
+  _offset = offset;
+  _stream = stream;
+  return _stream->Seek(offset, STREAM_SEEK_SET, NULL);
+}
+
+STDMETHODIMP COffsetOutStream::Write(const void *data, UInt32 size, UInt32 *processedSize)
+{
+  return _stream->Write(data, size, processedSize);
+}
+
+STDMETHODIMP COffsetOutStream::Seek(Int64 offset, UInt32 seekOrigin, 
+    UInt64 *newPosition)
+{
+  UInt64 absoluteNewPosition;
+  if (seekOrigin == STREAM_SEEK_SET)
+    offset += _offset;
+  HRESULT result = _stream->Seek(offset, seekOrigin, &absoluteNewPosition);
+  if (newPosition != NULL)
+    *newPosition = absoluteNewPosition - _offset;
+  return result;
+}
+
+STDMETHODIMP COffsetOutStream::SetSize(Int64 newSize)
+{
+  return _stream->SetSize(_offset + newSize);
+}