i2c-tools/tools/util.c

/*
    util.c - helper functions
    Copyright (C) 2006 Jean Delvare <khali@linux-fr.org>

    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 Street, Fifth Floor, Boston,
    MA 02110-1301 USA.
*/

#include <stdio.h>
#include "util.h"

/* Return 1 if we should continue, 0 if we should abort */
int user_ack(int def)
{
	char s[2];
	int ret;

	if (!fgets(s, 2, stdin))
		return 0; /* Nack by default */

	switch (s[0]) {
	case 'y':
	case 'Y':
		ret = 1;
		break;
	case 'n':
	case 'N':
		ret = 0;
		break;
	default:
		ret = def;
	}

	/* Flush extra characters */
	while (s[0] != '\n') {
		int c = fgetc(stdin);
		if (c == EOF) {
			ret = 0;
			break;
		}
		s[0] = c;
	}

	return ret;
}