Add IMemoryReadFile interface which allows direct access to memory block used as file.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@5799 dfc29bdd-3216-0410-991c-e03cc46cb475

changes.txt

@@ -1,5 +1,6 @@
 --------------------------
 Changes in 1.9 (not yet released)
+- Add IMemoryReadFile interface which allows direct access to memory block used as file.
 - Add IReadFile::getType() interface to all users to find out what kind of class implements that interface.
 - .dae/Collada reader/writer now handle whitespace in texture-filenames with escape characters (handle them as xs:anyURI).
 - Add function string::insert.

source/Irrlicht/CMemoryFile.h

@@ -5,7 +5,7 @@
 #ifndef __C_MEMORY_READ_FILE_H_INCLUDED__
 #define __C_MEMORY_READ_FILE_H_INCLUDED__
 
-#include "IReadFile.h"
+#include "IMemoryReadFile.h"
 #include "IWriteFile.h"
 #include "irrString.h"
 
@@ -18,7 +18,7 @@ namespace io
 	/*!
 		Class for reading from memory.
 	*/
-	class CMemoryReadFile : public IReadFile
+	class CMemoryReadFile : public IMemoryReadFile
 	{
 	public:
 
@@ -49,6 +49,12 @@ namespace io
 			return ERFT_MEMORY_READ_FILE;
 		}
 
+		//! Get direct access to internal buffer
+		virtual const void *getBuffer() const _IRR_OVERRIDE_
+		{
+			return Buffer;
+		}
+
 	private:
 
 		const void *Buffer;