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/**************************************************************************
Filename : OVR_SysFile.cpp
Content : File wrapper class implementation (Win32)
Created : April 5, 1999
Authors : Michael Antonov
Copyright : Copyright 2011 Oculus VR, Inc. All Rights reserved.
Use of this software is subject to the terms of the Oculus license
agreement provided at the time of installation or download, or which
otherwise accompanies this software in either electronic or hard copy form.
**************************************************************************/
#define GFILE_CXX
// Standard C library (Captain Obvious guarantees!)
#include <stdio.h>
#include "OVR_SysFile.h"
namespace OVR {
// This is - a dummy file that fails on all calls.
class UnopenedFile : public File
{
public:
UnopenedFile() { }
~UnopenedFile() { }
virtual const char* GetFilePath() { return 0; }
// ** File Information
virtual bool IsValid() { return 0; }
virtual bool IsWritable() { return 0; }
// Return position / file size
virtual int Tell() { return 0; }
virtual SInt64 LTell() { return 0; }
virtual int GetLength() { return 0; }
virtual SInt64 LGetLength() { return 0; }
// virtual bool Stat(FileStats *pfs) { return 0; }
virtual int GetErrorCode() { return Error_FileNotFound; }
// ** Stream implementation & I/O
virtual int Write(const UByte *pbuffer, int numBytes) { return -1; OVR_UNUSED2(pbuffer, numBytes); }
virtual int Read(UByte *pbuffer, int numBytes) { return -1; OVR_UNUSED2(pbuffer, numBytes); }
virtual int SkipBytes(int numBytes) { return 0; OVR_UNUSED(numBytes); }
virtual int BytesAvailable() { return 0; }
virtual bool Flush() { return 0; }
virtual int Seek(int offset, int origin) { return -1; OVR_UNUSED2(offset, origin); }
virtual SInt64 LSeek(SInt64 offset, int origin) { return -1; OVR_UNUSED2(offset, origin); }
virtual int CopyFromStream(File *pstream, int byteSize) { return -1; OVR_UNUSED2(pstream, byteSize); }
virtual bool Close() { return 0; }
};
// ***** System File
// System file is created to access objects on file system directly
// This file can refer directly to path
// ** Constructor
SysFile::SysFile() : DelegatedFile(0)
{
pFile = *new UnopenedFile;
}
File* FileFILEOpen(const String& path, int flags, int mode);
// Opens a file
SysFile::SysFile(const String& path, int flags, int mode) : DelegatedFile(0)
{
Open(path, flags, mode);
}
// ** Open & management
// Will fail if file's already open
bool SysFile::Open(const String& path, int flags, int mode)
{
pFile = *FileFILEOpen(path, flags, mode);
if ((!pFile) || (!pFile->IsValid()))
{
pFile = *new UnopenedFile;
return 0;
}
//pFile = *OVR_NEW DelegatedFile(pFile); // MA Testing
if (flags & Open_Buffered)
pFile = *new BufferedFile(pFile);
return 1;
}
// ** Overrides
int SysFile::GetErrorCode()
{
return pFile ? pFile->GetErrorCode() : Error_FileNotFound;
}
// Overrides to provide re-open support
bool SysFile::IsValid()
{
return pFile && pFile->IsValid();
}
bool SysFile::Close()
{
if (IsValid())
{
DelegatedFile::Close();
pFile = *new UnopenedFile;
return 1;
}
return 0;
}
} // OVR
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