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Annotation of truecrypt/platform/file.h, revision 1.1.1.8

1.1       root        1: /*
1.1.1.7   root        2:  Copyright (c) 2008-2009 TrueCrypt Developers Association. All rights reserved.
1.1       root        3: 
1.1.1.8 ! root        4:  Governed by the TrueCrypt License 3.0 the full text of which is contained in
1.1.1.7   root        5:  the file License.txt included in TrueCrypt binary and source code distribution
                      6:  packages.
1.1       root        7: */
                      8: 
                      9: #ifndef TC_HEADER_Platform_File
                     10: #define TC_HEADER_Platform_File
                     11: 
                     12: #include "PlatformBase.h"
                     13: #include "Buffer.h"
                     14: #include "FilesystemPath.h"
                     15: #include "SystemException.h"
                     16: 
                     17: namespace TrueCrypt
                     18: {
                     19:        class File
                     20:        {
                     21:        public:
                     22:                enum FileOpenMode
                     23:                {
                     24:                        CreateReadWrite,
                     25:                        CreateWrite,
                     26:                        OpenRead,
                     27:                        OpenWrite,
                     28:                        OpenReadWrite
                     29:                };
                     30: 
                     31:                enum FileShareMode
                     32:                {
                     33:                        ShareNone,
                     34:                        ShareRead,
                     35:                        ShareReadWrite,
                     36:                        ShareReadWriteIgnoreLock
                     37:                };
                     38: 
                     39:                enum FileOpenFlags
                     40:                {
                     41:                        // Bitmap
                     42:                        FlagsNone = 0,
                     43:                        PreserveTimestamps = 1 << 0,
                     44:                        DisableWriteCaching = 1 << 1
                     45:                };
                     46: 
                     47: #ifdef TC_WINDOWS
                     48:                typedef FILE* SystemFileHandleType;
                     49: #else
                     50:                typedef int SystemFileHandleType;
                     51: #endif
                     52: 
                     53:                File () : FileIsOpen (false), SharedHandle (false) { }
                     54:                virtual ~File ();
                     55:                        
                     56:                void AssignSystemHandle (SystemFileHandleType openFileHandle, bool sharedHandle = true)
                     57:                {
                     58:                        if (FileIsOpen)
                     59:                                Close();
                     60:                        FileHandle = openFileHandle;
                     61:                        FileIsOpen = true;
                     62:                        SharedHandle = sharedHandle;
                     63:                }
                     64: 
                     65:                void Close ();
                     66:                static void Copy (const FilePath &sourcePath, const FilePath &destinationPath, bool preserveTimestamps = true);
                     67:                void Delete ();
                     68:                void Flush () const;
                     69:                uint32 GetDeviceSectorSize () const;
                     70:                static size_t GetOptimalReadSize () { return OptimalReadSize; }
                     71:                static size_t GetOptimalWriteSize ()  { return OptimalWriteSize; }
1.1.1.3   root       72:                uint64 GetPartitionDeviceStartOffset () const;
1.1       root       73:                bool IsOpen () const { return FileIsOpen; }
                     74:                FilePath GetPath () const;
                     75:                uint64 Length () const;
                     76:                void Open (const FilePath &path, FileOpenMode mode = OpenRead, FileShareMode shareMode = ShareReadWrite, FileOpenFlags flags = FlagsNone);
                     77:                uint64 Read (const BufferPtr &buffer) const;
                     78:                void ReadCompleteBuffer (const BufferPtr &buffer) const;
                     79:                uint64 ReadAt (const BufferPtr &buffer, uint64 position) const;
                     80:                void SeekAt (uint64 position) const;
                     81:                void SeekEnd (int ofset) const;
                     82:                void Write (const ConstBufferPtr &buffer) const;
                     83:                void Write (const ConstBufferPtr &buffer, size_t length) const { Write (buffer.GetRange (0, length)); }
                     84:                void WriteAt (const ConstBufferPtr &buffer, uint64 position) const;
                     85:                
                     86:        protected:
                     87:                void ValidateState () const;
                     88: 
1.1.1.4   root       89:                static const size_t OptimalReadSize = 256 * 1024;
                     90:                static const size_t OptimalWriteSize = 256 * 1024;
1.1       root       91: 
                     92:                bool FileIsOpen;
                     93:                FileOpenFlags mFileOpenFlags;
                     94:                bool SharedHandle;
                     95:                FilePath Path;
                     96:                SystemFileHandleType FileHandle;
                     97: 
                     98: #ifdef TC_WINDOWS
                     99: #else
                    100:                time_t AccTime;
                    101:                time_t ModTime;
                    102: #endif
                    103: 
                    104:        private:
                    105:                File (const File &);
                    106:                File &operator= (const File &);
                    107:        };
                    108: }
                    109: 
                    110: #endif // TC_HEADER_Platform_File

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