nuclear@3: /**************************************************************************
nuclear@3: 
nuclear@3: Filename    :   OVR_SysFile.cpp
nuclear@3: Content     :   File wrapper class implementation (Win32)
nuclear@3: 
nuclear@3: Created     :   April 5, 1999
nuclear@3: Authors     :   Michael Antonov
nuclear@3: 
nuclear@3: Copyright   :   Copyright 2011 Oculus VR, Inc. All Rights reserved.
nuclear@3: 
nuclear@3: Use of this software is subject to the terms of the Oculus license
nuclear@3: agreement provided at the time of installation or download, or which
nuclear@3: otherwise accompanies this software in either electronic or hard copy form.
nuclear@3: 
nuclear@3: **************************************************************************/
nuclear@3: 
nuclear@3: #define  GFILE_CXX
nuclear@3: 
nuclear@3: // Standard C library (Captain Obvious guarantees!)
nuclear@3: #include <stdio.h>
nuclear@3: 
nuclear@3: #include "OVR_SysFile.h"
nuclear@3: 
nuclear@3: namespace OVR {
nuclear@3: 
nuclear@3: // This is - a dummy file that fails on all calls.
nuclear@3: 
nuclear@3: class UnopenedFile : public File
nuclear@3: {
nuclear@3: public:
nuclear@3:     UnopenedFile()  { }
nuclear@3:     ~UnopenedFile() { }
nuclear@3: 
nuclear@3:     virtual const char* GetFilePath()               { return 0; }
nuclear@3: 
nuclear@3:     // ** File Information
nuclear@3:     virtual bool        IsValid()                   { return 0; }
nuclear@3:     virtual bool        IsWritable()                { return 0; }
nuclear@3: 
nuclear@3:     // Return position / file size
nuclear@3:     virtual int         Tell()                      { return 0; }
nuclear@3:     virtual SInt64      LTell()                     { return 0; }
nuclear@3:     virtual int         GetLength()                 { return 0; }
nuclear@3:     virtual SInt64      LGetLength()                { return 0; }
nuclear@3: 
nuclear@3: //  virtual bool        Stat(FileStats *pfs)        { return 0; }
nuclear@3:     virtual int         GetErrorCode()              { return Error_FileNotFound; }
nuclear@3: 
nuclear@3:     // ** Stream implementation & I/O
nuclear@3:     virtual int         Write(const UByte *pbuffer, int numBytes)     { return -1; OVR_UNUSED2(pbuffer, numBytes); }
nuclear@3:     virtual int         Read(UByte *pbuffer, int numBytes)            { return -1; OVR_UNUSED2(pbuffer, numBytes); }
nuclear@3:     virtual int         SkipBytes(int numBytes)                       { return 0;  OVR_UNUSED(numBytes); }
nuclear@3:     virtual int         BytesAvailable()                              { return 0; }
nuclear@3:     virtual bool        Flush()                                       { return 0; }
nuclear@3:     virtual int         Seek(int offset, int origin)                  { return -1; OVR_UNUSED2(offset, origin); }
nuclear@3:     virtual SInt64      LSeek(SInt64 offset, int origin)              { return -1; OVR_UNUSED2(offset, origin); }
nuclear@3:     
nuclear@3:     virtual int         CopyFromStream(File *pstream, int byteSize)   { return -1; OVR_UNUSED2(pstream, byteSize); }
nuclear@3:     virtual bool        Close()                                       { return 0; }    
nuclear@3: };
nuclear@3: 
nuclear@3: 
nuclear@3: 
nuclear@3: // ***** System File
nuclear@3: 
nuclear@3: // System file is created to access objects on file system directly
nuclear@3: // This file can refer directly to path
nuclear@3: 
nuclear@3: // ** Constructor
nuclear@3: SysFile::SysFile() : DelegatedFile(0)
nuclear@3: {
nuclear@3:     pFile = *new UnopenedFile;
nuclear@3: }
nuclear@3: 
nuclear@3: File* FileFILEOpen(const String& path, int flags, int mode);
nuclear@3: 
nuclear@3: // Opens a file
nuclear@3: SysFile::SysFile(const String& path, int flags, int mode) : DelegatedFile(0)
nuclear@3: {
nuclear@3:     Open(path, flags, mode);
nuclear@3: }
nuclear@3: 
nuclear@3: 
nuclear@3: // ** Open & management
nuclear@3: // Will fail if file's already open
nuclear@3: bool SysFile::Open(const String& path, int flags, int mode)
nuclear@3: {
nuclear@3:     pFile = *FileFILEOpen(path, flags, mode);
nuclear@3:     if ((!pFile) || (!pFile->IsValid()))
nuclear@3:     {
nuclear@3:         pFile = *new UnopenedFile;
nuclear@3:         return 0;
nuclear@3:     }
nuclear@3:     //pFile = *OVR_NEW DelegatedFile(pFile); // MA Testing
nuclear@3:     if (flags & Open_Buffered)
nuclear@3:         pFile = *new BufferedFile(pFile);
nuclear@3:     return 1;
nuclear@3: }
nuclear@3: 
nuclear@3: 
nuclear@3: // ** Overrides
nuclear@3: 
nuclear@3: int SysFile::GetErrorCode()
nuclear@3: {
nuclear@3:     return pFile ? pFile->GetErrorCode() : Error_FileNotFound;
nuclear@3: }
nuclear@3: 
nuclear@3: 
nuclear@3: // Overrides to provide re-open support
nuclear@3: bool SysFile::IsValid()
nuclear@3: {
nuclear@3:     return pFile && pFile->IsValid();
nuclear@3: }
nuclear@3: bool SysFile::Close()
nuclear@3: {
nuclear@3:     if (IsValid())
nuclear@3:     {
nuclear@3:         DelegatedFile::Close();
nuclear@3:         pFile = *new UnopenedFile;
nuclear@3:         return 1;
nuclear@3:     }
nuclear@3:     return 0;
nuclear@3: }
nuclear@3: 
nuclear@3: } // OVR