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include/platform/filesystem/io_alias.h

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+/* -----------------------------------------------------------------------------
+	GSFramework
+	Copyright 2001-2013 Emmanuel Julien. All Rights Reserved.
+----------------------------------------------------------------------------- */
+
+
+#ifndef	__NIOALIAS__
+#define	__NIOALIAS__
+
+
+		#include <stdio.h>
+		#include "nstring/nstring.h"
+		#include "container/nmap.h"
+
+
+namespace GS {
+	namespace IO {
+		class Handle;
+
+/*!
+	@short	Alias proxy I/O.
+	A simple proxy I/O to provide filename aliasing to another I/O system.
+	@author	Emmanuel Julien (ejulien@nworks.fr)
+*/
+class	Alias : public Base
+{
+		SharedPtr <Base> iofs;
+
+public:
+
+		//----------------------------------------------------------------------
+		Map <String, String> alias_map;
+
+		String		ResolveAlias(const char *path) const
+		{
+			Pair <String, String> *alias = alias_map.Get(path);
+			return alias ? alias->value : path;
+		}
+		//----------------------------------------------------------------------
+
+virtual	Handle		*Open(const char *path, Mode mode = IORead)
+		{	return iofs->Open(ResolveAlias(path), mode);	}
+virtual	void		Close(Handle *h)
+		{	iofs->Close(h);	}
+
+virtual	bool		Delete(const char *path)
+		{	return iofs->Delete(ResolveAlias(path));	}
+
+virtual	size_t		Tell(Handle *h)
+		{	return iofs->Tell(h);	}
+virtual	size_t		Seek(Handle *h, ptrdiff_t offset, SeekRef seek_ref = SeekCurrent)
+		{	return iofs->Seek(h, offset, seek_ref);	}
+
+virtual	size_t		Read(Handle *h, void *p, size_t size)
+		{	return iofs->Read(h, p, size);	}
+virtual	size_t		Write(Handle *h, const void *p, size_t size)
+		{	return iofs->Write(h, p, size);	}
+
+		Alias(Base *io) : iofs(io) {}
+};
+
+	}	// IO
+}	// GS
+
+
+#endif	// __NIOALIAS__