/**
 * \file
 * Interface for the Contiki shell.
 * \author Adam Dunkels <adam@dunkels.com>
 *
 * Some of the functions declared in this file must be implemented as
 * a shell back-end in the architecture specific files of a Contiki
 * port.
 */


/*
 * Copyright (c) 2003, Adam Dunkels.
 * 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. The name of the author may not be used to endorse or promote
 *    products derived from this software without specific prior
 *    written permission.  
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 desktop OS.
 *
 * $Id: shell.h,v 1.4 2004/08/20 21:37:39 adamdunkels Exp $
 *
 */
#ifndef __SHELL_H__
#define __SHELL_H__

/**
 * Initialize the shell.
 *
 * Called when the shell front-end process starts. This function may
 * be used to start listening for signals.
 */
void shell_init(void);

/**
 * Start the shell back-end.
 *
 * Called by the front-end when a new shell is started.
 */
void shell_start(void);

/**
 * The shell event handler.
 *
 * This function will be called when an event is received.
 */
void shell_eventhandler(ek_event_t ev, ek_data_t data);

/**
 * Process a shell command.
 *
 * This function will be called by the shell GUI / telnet server whan
 * a command has been entered that should be processed by the shell
 * back-end.
 *
 * \param command The command to be processed.
 */
void shell_input(char *command);

/**
 * Quit the shell.
 *
 */
void shell_quit(char *);


/**
 * Print a string to the shell window.
 *
 * This function is implemented by the shell GUI / telnet server and
 * can be called by the shell back-end to output a string in the
 * shell window. The string is automatically appended with a linebreak.
 *
 * \param str1 The first half of the string to be output.
 * \param str2 The second half of the string to be output.
 */
void shell_output(const char *str1, const char *str2);

/**
 * Print a prompt to the shell window.
 *
 * This function can be used by the shell back-end to print out a
 * prompt to the shell window.
 *
 * \param prompt The prompt to be printed.
 *
 */
void shell_prompt(char *prompt);

#endif /* __SHELL_H__ */