/*
 * File      : filerw.h
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006 - 2009, RT-Thread Development Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rt-thread.org/license/LICENSE
 *
 * Change Logs:
 * Date           Author       Notes
 * 2009-10-16     Bernard      first version
 */
#ifndef __RTGUI_FILERW_H__
#define __RTGUI_FILERW_H__

#include <rtgui/rtgui.h>

#define RTGUI_FILE_SEEK_SET	0
#define RTGUI_FILE_SEEK_CUR	1
#define RTGUI_FILE_SEEK_END	2

struct rtgui_filerw
{
	int (*seek) (struct rtgui_filerw *context, rt_off_t offset, int whence);
	int (*read) (struct rtgui_filerw *context, void *buffer, rt_size_t size, rt_size_t count);
	int (*write)(struct rtgui_filerw *context, const void *buffer, rt_size_t size, rt_size_t count);
	int (*tell) (struct rtgui_filerw *context);
	int (*eof)	(struct rtgui_filerw *context);
	int (*close)(struct rtgui_filerw *context);
};
typedef struct rtgui_filerw rtgui_filerw_t;

struct rtgui_filerw* rtgui_filerw_create_file(const char* filename, const char* mode);
struct rtgui_filerw* rtgui_filerw_create_mem(const rt_uint8_t* mem, rt_size_t size);

int rtgui_filerw_seek (struct rtgui_filerw* context, rt_off_t offset, int whence);
int rtgui_filerw_read (struct rtgui_filerw* context, void* buffer, rt_size_t size, rt_size_t count);
int rtgui_filerw_write(struct rtgui_filerw* context, const void* buffer, rt_size_t size, rt_size_t count);
int rtgui_filerw_tell (struct rtgui_filerw* context);
int rtgui_filerw_eof  (struct rtgui_filerw* context);
int rtgui_filerw_close(struct rtgui_filerw* context);

/* get memory data from filerw memory object */
const rt_uint8_t* rtgui_filerw_mem_getdata(struct rtgui_filerw* context);

#endif