/* -----------------------------------------------------------------------------
	GSFramework
	Copyright 2001-2013 Emmanuel Julien. All Rights Reserved.
----------------------------------------------------------------------------- */


		#include <string.h>
		#include "filesystem/io_handle.h"
		#include "filesystem/io_base.h"

		using namespace GS::IO;


//------------------------------------------------------------------------------
size_t				Handle::GetSize()
{
	size_t p = Tell();
	Seek(0, Base::SeekEnd);
	size_t s = Tell();
	Seek(p, Base::SeekStart);
	return s;
}
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
bool				Handle::IsEOF()
{	return Tell() >= GetSize();	}
size_t				Handle::Rewind()
{	return Seek(0, Base::SeekStart);	}
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
size_t				Handle::Tell()
{	return io_sys.IsValid() ? io_sys->Tell(this) : 0;	}
size_t				Handle::Seek(ptrdiff_t offset, Base::SeekRef seek_ref)
{	return io_sys.IsValid() ? io_sys->Seek(this, offset, seek_ref) : 0;	}

size_t				Handle::Read(void *p, size_t size)
{	return io_sys.IsValid() ? io_sys->Read(this, p, size) : 0;	}
size_t				Handle::Write(const void *p, size_t size)
{	return io_sys.IsValid() ? io_sys->Write(this, p, size) : 0;	}
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
Handle				&Handle::operator << (const char *s)
{
	if	(s)
		Write(s, strlen(s));
	return *this;
}
Handle				&Handle::operator << (char *s)
{	return *this << ((const char *)s);	}
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
Handle::Handle(Base *io) : io_sys(io) {}
Handle::~Handle() {}
//------------------------------------------------------------------------------