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annotate libovr/Src/Kernel/OVR_SysFile.cpp @ 1:e2f9e4603129

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added LibOVR and started a simple vr wrapper.
author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 14 Sep 2013 16:14:59 +0300
parents
children b069a5c27388
rev   line source
nuclear@1 1 /**************************************************************************
nuclear@1 2
nuclear@1 3 Filename : OVR_SysFile.cpp
nuclear@1 4 Content : File wrapper class implementation (Win32)
nuclear@1 5
nuclear@1 6 Created : April 5, 1999
nuclear@1 7 Authors : Michael Antonov
nuclear@1 8
nuclear@1 9 Copyright : Copyright 2011 Oculus VR, Inc. All Rights reserved.
nuclear@1 10
nuclear@1 11 Use of this software is subject to the terms of the Oculus license
nuclear@1 12 agreement provided at the time of installation or download, or which
nuclear@1 13 otherwise accompanies this software in either electronic or hard copy form.
nuclear@1 14
nuclear@1 15 **************************************************************************/
nuclear@1 16
nuclear@1 17 #define GFILE_CXX
nuclear@1 18
nuclear@1 19 // Standard C library (Captain Obvious guarantees!)
nuclear@1 20 #include <stdio.h>
nuclear@1 21
nuclear@1 22 #include "OVR_SysFile.h"
nuclear@1 23
nuclear@1 24 namespace OVR {
nuclear@1 25
nuclear@1 26 // This is - a dummy file that fails on all calls.
nuclear@1 27
nuclear@1 28 class UnopenedFile : public File
nuclear@1 29 {
nuclear@1 30 public:
nuclear@1 31 UnopenedFile() { }
nuclear@1 32 ~UnopenedFile() { }
nuclear@1 33
nuclear@1 34 virtual const char* GetFilePath() { return 0; }
nuclear@1 35
nuclear@1 36 // ** File Information
nuclear@1 37 virtual bool IsValid() { return 0; }
nuclear@1 38 virtual bool IsWritable() { return 0; }
nuclear@1 39
nuclear@1 40 // Return position / file size
nuclear@1 41 virtual int Tell() { return 0; }
nuclear@1 42 virtual SInt64 LTell() { return 0; }
nuclear@1 43 virtual int GetLength() { return 0; }
nuclear@1 44 virtual SInt64 LGetLength() { return 0; }
nuclear@1 45
nuclear@1 46 // virtual bool Stat(FileStats *pfs) { return 0; }
nuclear@1 47 virtual int GetErrorCode() { return Error_FileNotFound; }
nuclear@1 48
nuclear@1 49 // ** Stream implementation & I/O
nuclear@1 50 virtual int Write(const UByte *pbuffer, int numBytes) { return -1; OVR_UNUSED2(pbuffer, numBytes); }
nuclear@1 51 virtual int Read(UByte *pbuffer, int numBytes) { return -1; OVR_UNUSED2(pbuffer, numBytes); }
nuclear@1 52 virtual int SkipBytes(int numBytes) { return 0; OVR_UNUSED(numBytes); }
nuclear@1 53 virtual int BytesAvailable() { return 0; }
nuclear@1 54 virtual bool Flush() { return 0; }
nuclear@1 55 virtual int Seek(int offset, int origin) { return -1; OVR_UNUSED2(offset, origin); }
nuclear@1 56 virtual SInt64 LSeek(SInt64 offset, int origin) { return -1; OVR_UNUSED2(offset, origin); }
nuclear@1 57
nuclear@1 58 virtual int CopyFromStream(File *pstream, int byteSize) { return -1; OVR_UNUSED2(pstream, byteSize); }
nuclear@1 59 virtual bool Close() { return 0; }
nuclear@1 60 };
nuclear@1 61
nuclear@1 62
nuclear@1 63
nuclear@1 64 // ***** System File
nuclear@1 65
nuclear@1 66 // System file is created to access objects on file system directly
nuclear@1 67 // This file can refer directly to path
nuclear@1 68
nuclear@1 69 // ** Constructor
nuclear@1 70 SysFile::SysFile() : DelegatedFile(0)
nuclear@1 71 {
nuclear@1 72 pFile = *new UnopenedFile;
nuclear@1 73 }
nuclear@1 74
nuclear@1 75 File* FileFILEOpen(const String& path, int flags, int mode);
nuclear@1 76
nuclear@1 77 // Opens a file
nuclear@1 78 SysFile::SysFile(const String& path, int flags, int mode) : DelegatedFile(0)
nuclear@1 79 {
nuclear@1 80 Open(path, flags, mode);
nuclear@1 81 }
nuclear@1 82
nuclear@1 83
nuclear@1 84 // ** Open & management
nuclear@1 85 // Will fail if file's already open
nuclear@1 86 bool SysFile::Open(const String& path, int flags, int mode)
nuclear@1 87 {
nuclear@1 88 pFile = *FileFILEOpen(path, flags, mode);
nuclear@1 89 if ((!pFile) || (!pFile->IsValid()))
nuclear@1 90 {
nuclear@1 91 pFile = *new UnopenedFile;
nuclear@1 92 return 0;
nuclear@1 93 }
nuclear@1 94 //pFile = *OVR_NEW DelegatedFile(pFile); // MA Testing
nuclear@1 95 if (flags & Open_Buffered)
nuclear@1 96 pFile = *new BufferedFile(pFile);
nuclear@1 97 return 1;
nuclear@1 98 }
nuclear@1 99
nuclear@1 100
nuclear@1 101 // ** Overrides
nuclear@1 102
nuclear@1 103 int SysFile::GetErrorCode()
nuclear@1 104 {
nuclear@1 105 return pFile ? pFile->GetErrorCode() : Error_FileNotFound;
nuclear@1 106 }
nuclear@1 107
nuclear@1 108
nuclear@1 109 // Overrides to provide re-open support
nuclear@1 110 bool SysFile::IsValid()
nuclear@1 111 {
nuclear@1 112 return pFile && pFile->IsValid();
nuclear@1 113 }
nuclear@1 114 bool SysFile::Close()
nuclear@1 115 {
nuclear@1 116 if (IsValid())
nuclear@1 117 {
nuclear@1 118 DelegatedFile::Close();
nuclear@1 119 pFile = *new UnopenedFile;
nuclear@1 120 return 1;
nuclear@1 121 }
nuclear@1 122 return 0;
nuclear@1 123 }
nuclear@1 124
nuclear@1 125 } // OVR