feat(file): Add flush function to LocalFile (#1385)

Author: Mauller

Core/GameEngine/Include/Common/LocalFile.h

@@ -101,6 +101,7 @@ class LocalFile : public File
 		virtual Int		read( void *buffer, Int bytes );										///< Read the specified number of bytes in to buffer: See File::read
 		virtual Int		write( const void *buffer, Int bytes );							///< Write the specified number of bytes from the buffer: See File::write
 		virtual Int		seek( Int new_pos, seekMode mode = CURRENT );				///< Set file position: See File::seek
+		virtual Bool	flush();													///< flush data to disk
 		virtual void	nextLine(Char *buf = NULL, Int bufSize = 0);				///< moves file position to after the next new-line
 		virtual Bool	scanInt(Int &newInt);																///< return what gets read in as an integer at the current file position.
 		virtual Bool	scanReal(Real &newReal);														///< return what gets read in as a float at the current file position.

Core/GameEngine/Include/Common/RAMFile.h

@@ -92,6 +92,7 @@ class RAMFile : public File
 		virtual Int		read( void *buffer, Int bytes );										///< Read the specified number of bytes in to buffer: See File::read
 		virtual Int		write( const void *buffer, Int bytes );							///< Write the specified number of bytes from the buffer: See File::write
 		virtual Int		seek( Int new_pos, seekMode mode = CURRENT );				///< Set file position: See File::seek
+		virtual Bool	flush();													///< flush data to disk
 		virtual void	nextLine(Char *buf = NULL, Int bufSize = 0);				///< moves current position to after the next new-line
 
 		virtual Bool	scanInt(Int &newInt);																///< return what gets read as an integer from the current memory position.

Core/GameEngine/Include/Common/file.h

@@ -147,15 +147,15 @@ class File : public MemoryPoolObject
 		virtual Bool	open( const Char *filename, Int access = NONE, size_t bufferSize = BUFFERSIZE ); ///< Open a file for access
 		virtual void	close( void );																			///< Close the file !!! File object no longer valid after this call !!!
 
-		virtual Int		read( void *buffer, Int bytes ) = NULL ;						/**< Read the specified number of bytes from the file in to the 
+		virtual Int		read( void *buffer, Int bytes ) = 0 ;						/**< Read the specified number of bytes from the file in to the 
 																																			  *  memory pointed at by buffer. Returns the number of bytes read.
 																																			  *  Returns -1 if an error occurred.
 																																			  */
-		virtual Int		write( const void *buffer, Int bytes ) = NULL ;						/**< Write the specified number of bytes from the    
+		virtual Int		write( const void *buffer, Int bytes ) = 0 ;						/**< Write the specified number of bytes from the    
 																																			  *	 memory pointed at by buffer to the file. Returns the number of bytes written.
 																																			  *	 Returns -1 if an error occurred.
 																																			  */
-		virtual Int		seek( Int bytes, seekMode mode = CURRENT ) = NULL;	/**< Sets the file position of the next read/write operation. Returns the new file
+		virtual Int		seek( Int bytes, seekMode mode = CURRENT ) = 0;	/**< Sets the file position of the next read/write operation. Returns the new file
 																																				*  position as the number of bytes from the start of the file.
 																																				*  Returns -1 if an error occurred.
 																																				*
@@ -165,6 +165,7 @@ class File : public MemoryPoolObject
 																																				*  CURRENT: means seek the specified the number of bytes from the current file position
 																																				*  END: means seek the specified number of bytes back from the end of the file
 																																				*/
+		virtual Bool	flush() = 0;											///< flush data to disk
 		virtual void	nextLine(Char *buf = NULL, Int bufSize = 0) = 0;		///< reads until it reaches a new-line character
 
 		virtual Bool	scanInt(Int &newInt) = 0;														///< read an integer from the current file position.

Core/GameEngine/Source/Common/System/LocalFile.cpp

@@ -418,6 +418,15 @@ Int LocalFile::seek( Int pos, seekMode mode)
 	return ret;
 }
 
+//=================================================================
+// LocalFile::flush
+//=================================================================
+
+Bool LocalFile::flush()
+{
+	return fflush(m_file) != EOF;
+}
+
 //=================================================================
 // LocalFile::scanInt
 //=================================================================

Core/GameEngine/Source/Common/System/RAMFile.cpp

@@ -334,6 +334,15 @@ Int RAMFile::seek( Int pos, seekMode mode)
 
 }
 
+//=================================================================
+// RAMFile::flush
+//=================================================================
+
+Bool RAMFile::flush()
+{
+	return false;
+}
+
 //=================================================================
 // RAMFile::scanInt
 //=================================================================