| /* |
| * 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.c,v 1.3 2004/09/12 20:24:55 adamdunkels Exp $ |
| */ |
| #include "contiki.h" |
| |
| #include "cfs.h" |
| #include "cfs-service.h" |
| |
| |
| static int null_open(const char *n, int f) {return -1;} |
| static void null_close(int f) {return;} |
| static int null_read(int f, char *b, unsigned int l) {return -1;} |
| static int null_write(int f, char *b, unsigned int l) {return -1;} |
| static int null_opendir(struct cfs_dir *p, const char *n) {return -1;} |
| static int null_readdir(struct cfs_dir *p, struct cfs_dirent *e) {return -1;} |
| static int null_closedir(struct cfs_dir *p) {return -1;} |
| |
| static const struct cfs_service_interface nullinterface = |
| { |
| CFS_SERVICE_VERSION, |
| null_open, |
| null_close, |
| null_read, |
| null_write, |
| null_opendir, |
| null_readdir, |
| null_closedir |
| }; |
| |
| EK_SERVICE(service, CFS_SERVICE_NAME); |
| |
| /*---------------------------------------------------------------------------*/ |
| struct cfs_service_interface * |
| cfs_find_service(void) |
| { |
| struct cfs_service_interface *interface; |
| interface = (struct cfs_service_interface *)ek_service_state(&service); |
| if(interface != NULL && |
| interface->version == CFS_SERVICE_VERSION) { |
| return interface; |
| } else { |
| return (struct cfs_service_interface *)&nullinterface; |
| } |
| } |
| /*---------------------------------------------------------------------------*/ |