simple_fs.h

MANTIS是由科罗拉多大学开发的传感器网络嵌入式操作系统。 这是mantis的0.9.5版本的源码。

//  This file is part of MANTIS OS, Operating System
//  See http://mantis.cs.colorado.edu/
//
//  Copyright (C) 2003,2004,2005 University of Colorado, Boulder
//
//  This program is free software; you can redistribute it and/or
//  modify it under the terms of the mos license (see file LICENSE)

/** @file simple_fs.h
 * @brief Super-simple file system
 */

#ifndef _SIMPLE_FS_H_
#define _SIMPLE_FS_H_

/* The following file names are already in use:
 * 
 * prg - program image propagated by Aqueduct or Deluge
 * aqX - cache file used by Aqueduct or Deluge, X is a letter starting from '1'
 * rrp - temporary program image stored by repro_reprogram function before it
 *       gets renamed to 'prg' or 'bkX'
 * bkX - backup image, X is a letter starting from '1'
 */
 
#include "mos.h"

typedef struct {
	// This field was originally supposed to mean something more,
	// but now is just being used as a flag that the file is allocated. 
	int8_t index;
	uint8_t name[3];
	uint32_t start;
	uint32_t length;
} mos_file;

void simple_fs_init();
void simple_fs_format();
mos_file* mos_file_create(const char* name, uint32_t length);
mos_file* mos_file_open(const char* name);
void mos_file_rename(const char* src, const char* dst);
uint16_t mos_file_read(uint8_t* buf, mos_file* file, uint32_t offset, uint16_t length);
uint16_t mos_file_write(uint8_t* buf, mos_file* file, uint32_t offset, uint16_t length);
uint16_t mos_file_crc(mos_file* file, uint32_t offset, uint32_t length);
void mos_file_flush(mos_file* file);
int8_t mos_file_close(mos_file* file);
void simple_fs_ls();

#endif /* _SIMPLE_FS_H_ */