mirror of
https://github.com/Open-Cascade-SAS/OCCT.git
synced 2026-05-19 01:39:00 +08:00
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.
77 lines
3.4 KiB
C++
77 lines
3.4 KiB
C++
// Copyright (c) 2021 OPEN CASCADE SAS
|
|
//
|
|
// This file is part of Open CASCADE Technology software library.
|
|
//
|
|
// This library is free software; you can redistribute it and/or modify it under
|
|
// the terms of the GNU Lesser General Public License version 2.1 as published
|
|
// by the Free Software Foundation, with special exception defined in the file
|
|
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
|
|
// distribution for complete text of the license and disclaimer of any warranty.
|
|
//
|
|
// Alternatively, this file may be used under the terms of Open CASCADE
|
|
// commercial license or contractual agreement.
|
|
|
|
#include <OSD_LocalFileSystem.hxx>
|
|
#include <OSD_OpenFile.hxx>
|
|
#include <OSD_Path.hxx>
|
|
#include <Standard_Assert.hxx>
|
|
|
|
IMPLEMENT_STANDARD_RTTIEXT(OSD_LocalFileSystem, OSD_FileSystem)
|
|
|
|
//=======================================================================
|
|
// function : IsSupportedPath
|
|
// purpose :
|
|
//=======================================================================
|
|
Standard_Boolean OSD_LocalFileSystem::IsSupportedPath (const TCollection_AsciiString& theUrl) const
|
|
{
|
|
return !OSD_Path::IsRemoteProtocolPath (theUrl.ToCString());
|
|
}
|
|
|
|
//=======================================================================
|
|
// function : IsOpenIStream
|
|
// purpose :
|
|
//=======================================================================
|
|
Standard_Boolean OSD_LocalFileSystem::IsOpenIStream (const opencascade::std::shared_ptr<std::istream>& theStream) const
|
|
{
|
|
opencascade::std::shared_ptr<OSD_IStreamBuffer> aFileStream = opencascade::std::dynamic_pointer_cast<OSD_IStreamBuffer> (theStream);
|
|
if (aFileStream.get() == NULL)
|
|
{
|
|
return false;
|
|
}
|
|
const std::filebuf* aFileBuf = dynamic_cast<const std::filebuf*> (aFileStream->rdbuf());
|
|
return (aFileBuf != NULL) ? aFileBuf->is_open() : false;
|
|
}
|
|
|
|
//=======================================================================
|
|
// function : OpenStreamBuffer
|
|
// purpose :
|
|
//=======================================================================
|
|
opencascade::std::shared_ptr<std::streambuf> OSD_LocalFileSystem::OpenStreamBuffer (const TCollection_AsciiString& theUrl,
|
|
const std::ios_base::openmode theMode,
|
|
const int64_t theOffset,
|
|
int64_t* theOutBufSize)
|
|
{
|
|
Standard_ASSERT_RAISE (theOffset >= 0, "Incorrect negative stream position during stream buffer opening");
|
|
opencascade::std::shared_ptr<std::filebuf> aNewBuf(new std::filebuf());
|
|
if (!OSD_OpenStream (*aNewBuf, TCollection_ExtendedString(theUrl), theMode))
|
|
{
|
|
return opencascade::std::shared_ptr<std::streambuf>();
|
|
}
|
|
// if buffer is opened for read, find the file size
|
|
if (theOutBufSize && ((theMode & std::ios::in) != 0))
|
|
{
|
|
*theOutBufSize = (int64_t )aNewBuf->pubseekoff (0, std::ios_base::end, std::ios_base::in);
|
|
if (aNewBuf->pubseekoff ((std::streamoff )theOffset, std::ios_base::beg, std::ios_base::in) < 0)
|
|
{
|
|
*theOutBufSize = 0;
|
|
return opencascade::std::shared_ptr<std::streambuf>();
|
|
}
|
|
}
|
|
else if (theOffset > 0 && aNewBuf->pubseekoff ((std::streamoff )theOffset, std::ios_base::beg,
|
|
(theMode & std::ios::in) != 0 ? std::ios_base::in : std::ios_base::out) < 0)
|
|
{
|
|
return opencascade::std::shared_ptr<std::streambuf>();
|
|
}
|
|
return aNewBuf;
|
|
}
|