mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-11-04 13:06:38 +00:00
142 lines
4.0 KiB
C
142 lines
4.0 KiB
C
/*
|
|
* Copyright (c) 2004, Swedish Institute of Computer Science.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
* Author: Adam Dunkels <adam@sics.se>
|
|
*
|
|
* $Id: cfs-eeprom.c,v 1.10 2009/02/27 14:50:35 nvt-se Exp $
|
|
*/
|
|
|
|
#include "cfs/cfs.h"
|
|
#include "dev/eeprom.h"
|
|
|
|
struct filestate {
|
|
int flag;
|
|
#define FLAG_FILE_CLOSED 0
|
|
#define FLAG_FILE_OPEN 1
|
|
eeprom_addr_t fileptr;
|
|
eeprom_addr_t filesize;
|
|
};
|
|
|
|
static struct filestate file;
|
|
|
|
#ifdef CFS_EEPROM_CONF_OFFSET
|
|
#define CFS_EEPROM_OFFSET CFS_EEPROM_CONF_OFFSET
|
|
#else
|
|
#define CFS_EEPROM_OFFSET 0
|
|
#endif
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
cfs_open(const char *n, int f)
|
|
{
|
|
if(file.flag == FLAG_FILE_CLOSED) {
|
|
file.flag = FLAG_FILE_OPEN;
|
|
if(f & CFS_READ) {
|
|
file.fileptr = 0;
|
|
}
|
|
if(f & CFS_WRITE){
|
|
if(f & CFS_APPEND) {
|
|
file.fileptr = file.filesize;
|
|
} else {
|
|
file.fileptr = 0;
|
|
file.filesize = 0;
|
|
}
|
|
}
|
|
return 1;
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
cfs_close(int f)
|
|
{
|
|
file.flag = FLAG_FILE_CLOSED;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
cfs_read(int f, void *buf, unsigned int len)
|
|
{
|
|
if(f == 1) {
|
|
eeprom_read(CFS_EEPROM_OFFSET + file.fileptr, buf, len);
|
|
file.fileptr += len;
|
|
return len;
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
cfs_write(int f, const void *buf, unsigned int len)
|
|
{
|
|
if(f == 1) {
|
|
eeprom_write(CFS_EEPROM_OFFSET + file.fileptr, buf, len);
|
|
file.fileptr += len;
|
|
return len;
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
cfs_offset_t
|
|
cfs_seek(int f, cfs_offset_t o, int w)
|
|
{
|
|
if(w == CFS_SEEK_SET && f == 1) {
|
|
file.fileptr = o;
|
|
return o;
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
cfs_remove(const char *name)
|
|
{
|
|
return -1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
cfs_opendir(struct cfs_dir *p, const char *n)
|
|
{
|
|
return -1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
cfs_readdir(struct cfs_dir *p, struct cfs_dirent *e)
|
|
{
|
|
return -1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
cfs_closedir(struct cfs_dir *p)
|
|
{
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|