Copy irrlichtmt to <root>/irr/

irr/src/CLimitReadFile.h

@@ -0,0 +1,62 @@
+// Copyright (C) 2002-2012 Nikolaus Gebhardt
+// This file is part of the "Irrlicht Engine".
+// For conditions of distribution and use, see copyright notice in irrlicht.h
+
+#pragma once
+
+#include "IReadFile.h"
+#include "irrString.h"
+
+namespace irr
+{
+class CUnicodeConverter;
+
+namespace io
+{
+
+/*! this is a read file, which is limited to some boundaries,
+	so that it may only start from a certain file position
+	and may only read until a certain file position.
+	This can be useful, for example for reading uncompressed files
+	in an archive (zip, tar).
+!*/
+class CLimitReadFile : public IReadFile
+{
+public:
+	CLimitReadFile(IReadFile *alreadyOpenedFile, long pos, long areaSize, const io::path &name);
+
+	virtual ~CLimitReadFile();
+
+	//! returns how much was read
+	size_t read(void *buffer, size_t sizeToRead) override;
+
+	//! changes position in file, returns true if successful
+	//! if relativeMovement==true, the pos is changed relative to current pos,
+	//! otherwise from begin of file
+	bool seek(long finalPos, bool relativeMovement = false) override;
+
+	//! returns size of file
+	long getSize() const override;
+
+	//! returns where in the file we are.
+	long getPos() const override;
+
+	//! returns name of file
+	const io::path &getFileName() const override;
+
+	//! Get the type of the class implementing this interface
+	EREAD_FILE_TYPE getType() const override
+	{
+		return ERFT_LIMIT_READ_FILE;
+	}
+
+private:
+	io::path Filename;
+	long AreaStart;
+	long AreaEnd;
+	long Pos;
+	IReadFile *File;
+};
+
+} // end namespace io
+} // end namespace irr