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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.
67 lines
3.0 KiB
C++
67 lines
3.0 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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#ifndef _OSD_FileSystemSelector_HeaderFile
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#define _OSD_FileSystemSelector_HeaderFile
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#include <OSD_FileSystem.hxx>
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#include <NCollection_List.hxx>
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//! File system implementation which tried to open stream using registered list of file systems.
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class OSD_FileSystemSelector : public OSD_FileSystem
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{
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DEFINE_STANDARD_RTTIEXT(OSD_FileSystemSelector, OSD_FileSystem)
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public:
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//! Constructor.
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OSD_FileSystemSelector() {}
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//! Registers file system within the global file system selector returned by OSD_FileSystem::DefaultFileSystem().
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//! @param theFileSystem [in] file system to register
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//! @param theIsPreferred [in] add to the beginning of the list when TRUE, or add to the end otherwise
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Standard_EXPORT void AddProtocol (const Handle(OSD_FileSystem)& theFileSystem, bool theIsPreferred = false);
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//! Unregisters file system within the global file system selector returned by OSD_FileSystem::DefaultFileSystem().
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Standard_EXPORT void RemoveProtocol (const Handle(OSD_FileSystem)& theFileSystem);
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public:
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//! Returns TRUE if URL defines a supported protocol.
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Standard_EXPORT virtual bool IsSupportedPath (const TCollection_AsciiString& theUrl) const Standard_OVERRIDE;
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//! Returns TRUE if current input stream is opened for reading operations.
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Standard_EXPORT virtual Standard_Boolean IsOpenIStream (const opencascade::std::shared_ptr<std::istream>& theStream) const Standard_OVERRIDE;
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//! Opens input stream using one of registered protocols.
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Standard_EXPORT virtual opencascade::std::shared_ptr<std::istream> OpenIStream
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(const TCollection_AsciiString& theUrl,
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const std::ios_base::openmode theMode,
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const int64_t theOffset = 0,
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const opencascade::std::shared_ptr<std::istream>& theOldStream = opencascade::std::shared_ptr<std::istream>()) Standard_OVERRIDE;
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//! Opens stream buffer using one of registered protocols.
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Standard_EXPORT virtual opencascade::std::shared_ptr<std::streambuf> OpenStreamBuffer
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(const TCollection_AsciiString& theUrl,
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const std::ios_base::openmode theMode,
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const int64_t theOffset = 0,
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int64_t* theOutBufSize = NULL) Standard_OVERRIDE;
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protected:
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NCollection_List<Handle(OSD_FileSystem)> myProtocols;
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};
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#endif // _OSD_FileSystemSelector_HeaderFile
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