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/* MSPDebug - debugging tool for MSP430 MCUs
* Copyright (C) 2009-2012 Daniel Beer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef INPUT_H_
#define INPUT_H_
/* This defines the interface to an input module. The input module is
* responsible for providing a way of fetching commands to be executed,
* and a way of presenting yes/no questions to the user ("are you sure
* you want to ...?").
*/
struct input_interface {
/* Initialize/tear down the input subsystem. */
int (*init)(void);
void (*exit)(void);
/* Read a command from the user into the supplied buffer. This
* function returns 0 on success, -1 if an error occurs, and 1
* if the end of input has been reached.
*/
int (*read_command)(char *buf, int max_len);
/* Prompt the user before performing a destructive operation.
* The question should be phrased so that "yes" confirms that
* the operation should proceed.
*
* Returns 1 for no (abort), 0 for yes (continue), and -1 if an
* error occurs.
*/
int (*prompt_abort)(const char *message);
};
/* Variable which holds a reference to the selected input module. */
extern const struct input_interface *input_module;
#endif
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