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https://git.dev.opencascade.org/repos/occt.git
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92f8ec2f01
1) Remove unnecessary includes of "Standard_OStream.hxx" file and add it only into files where it is really used. 2) Create the base interface for a file stream provider OSD_FileSystem and its inheritor OSD_CachedFileSystem that keeping last stream to be reused for opening a stream with the same URL. 3) Use OSD_CachedFileSystem object instead of RWGltf_GltfSharedIStream during Gltf reading.
133 lines
5.2 KiB
C++
133 lines
5.2 KiB
C++
// Copyright (c) 2021 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <OSD_FileSystemSelector.hxx>
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IMPLEMENT_STANDARD_RTTIEXT(OSD_FileSystemSelector, OSD_FileSystem)
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//=======================================================================
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// function : AddProtocol
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// purpose :
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//=======================================================================
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void OSD_FileSystemSelector::AddProtocol (const Handle(OSD_FileSystem)& theFileSystem, bool theIsPreferred)
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{
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myProtocols.Remove (theFileSystem); // avoid duplicates
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if (theIsPreferred)
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{
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myProtocols.Prepend (theFileSystem);
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}
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else
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{
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myProtocols.Append (theFileSystem);
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}
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}
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//=======================================================================
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// function : RemoveProtocol
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// purpose :
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//=======================================================================
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void OSD_FileSystemSelector::RemoveProtocol (const Handle(OSD_FileSystem)& theFileSystem)
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{
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myProtocols.Remove (theFileSystem);
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}
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//=======================================================================
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// function : IsSupportedPath
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// purpose :
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//=======================================================================
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Standard_Boolean OSD_FileSystemSelector::IsSupportedPath (const TCollection_AsciiString& theUrl) const
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{
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for (NCollection_List<Handle(OSD_FileSystem)>::Iterator aProtIter(myProtocols); aProtIter.More(); aProtIter.Next())
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{
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if (aProtIter.Value()->IsSupportedPath (theUrl))
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{
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return true;
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}
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}
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return false;
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}
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//=======================================================================
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// function : IsOpenIStream
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// purpose :
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//=======================================================================
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Standard_Boolean OSD_FileSystemSelector::IsOpenIStream (const opencascade::std::shared_ptr<std::istream>& theStream) const
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{
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opencascade::std::shared_ptr<OSD_IStreamBuffer> aFileStream = opencascade::std::dynamic_pointer_cast<OSD_IStreamBuffer> (theStream);
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if (aFileStream.get() == NULL)
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{
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return false;
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}
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for (NCollection_List<Handle(OSD_FileSystem)>::Iterator aProtIter(myProtocols); aProtIter.More(); aProtIter.Next())
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{
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const Handle(OSD_FileSystem)& aFileSystem = aProtIter.Value();
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if (aFileSystem->IsSupportedPath (TCollection_AsciiString (aFileStream->Url().c_str())))
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{
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if (aFileSystem->IsOpenIStream (theStream))
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{
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return true;
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}
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}
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}
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return false;
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}
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//=======================================================================
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// function : OpenIStream
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// purpose :
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//=======================================================================
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opencascade::std::shared_ptr<std::istream> OSD_FileSystemSelector::OpenIStream (const TCollection_AsciiString& theUrl,
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const std::ios_base::openmode theMode,
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const int64_t theOffset,
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const opencascade::std::shared_ptr<std::istream>& theOldStream)
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{
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for (NCollection_List<Handle(OSD_FileSystem)>::Iterator aProtIter (myProtocols); aProtIter.More(); aProtIter.Next())
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{
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const Handle(OSD_FileSystem)& aFileSystem = aProtIter.Value();
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if (aFileSystem->IsSupportedPath (theUrl))
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{
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opencascade::std::shared_ptr<std::istream> aStream = aFileSystem->OpenIStream (theUrl, theMode, theOffset, theOldStream);
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if (aStream.get() != NULL)
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{
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return aStream;
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}
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}
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}
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return opencascade::std::shared_ptr<std::istream>();
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}
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//=======================================================================
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// function : OpenStreamBuffer
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// purpose :
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//=======================================================================
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opencascade::std::shared_ptr<std::streambuf> OSD_FileSystemSelector::OpenStreamBuffer (const TCollection_AsciiString& theUrl,
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const std::ios_base::openmode theMode,
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const int64_t theOffset,
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int64_t* theOutBufSize)
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{
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for (NCollection_List<Handle(OSD_FileSystem)>::Iterator aProtIter (myProtocols); aProtIter.More(); aProtIter.Next())
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{
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const Handle(OSD_FileSystem)& aFileSystem = aProtIter.Value();
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if (aFileSystem->IsSupportedPath (theUrl))
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{
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opencascade::std::shared_ptr<std::streambuf> aBuf = aFileSystem->OpenStreamBuffer (theUrl, theMode, theOffset, theOutBufSize);
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if (aBuf.get() != NULL)
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{
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return aBuf;
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}
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}
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}
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return opencascade::std::shared_ptr<std::streambuf>();
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}
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