libevent.c

VoiFax is a program that manage voice/data/fax modem in the same manner of vgetty and mgetty.VoiFax

/*  voifax event handling library
 *  Copyright (C) 2004  Simone Freddio & Andrea Emanuelli
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "libevent.h"
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>

typedef struct {
	t_libevent_handler_entry	item[MAX_HANDLERS];
} t_libevent_list;

static t_libevent_list libevent_handlers;

static int search_free_handler(void);

static int search_free_handler(void)
{
	char module[] = "search_free_handler";
	int a;

	for (a = 0; a < MAX_HANDLERS; a++)
	{
		if (libevent_handlers.item[a].handler == NULL)
			return a;
	}

	TRC(TRC_ERR, module, "No free handlers");

	return -1;
}

int libevent_add_handler(t_libevent_handler *handler, char *event)
{
	int hidx = search_free_handler();

	if (hidx == -1)
	{
		return false;
	}

	libevent_handlers.item[hidx].handler = handler;
	strcpy(libevent_handlers.item[hidx].event, event);

	return true;
}

int libevent_remove_handler(t_libevent_handler *handler)
{
	int a;

	for (a = 0; a < MAX_HANDLERS; a++)
	{
		if (libevent_handlers.item[a].handler == handler)
		{
			libevent_handlers.item[a].handler = NULL;
			libevent_handlers.item[a].event[0] = 0;

			return true;
		}
	}

	return false;
}

int libevent_process_event(char *message)
{
	int a, c;
	char args[10][200];
	char *argv[10];
	int argc;

	for (a = 0; a < MAX_HANDLERS; a++)
	{
		if (libevent_handlers.item[a].handler != NULL &&
				strncmp(libevent_handlers.item[a].event, 
								message,
								strlen(libevent_handlers.item[a].event)) == 0)
		{
			argc = sscanf(message, "%s %s %s %s %s %s", args[0], args[1], args[2], 
																								args[3], args[4], args[5]);

			for (c = 0; c < argc; c++)
			{
				argv[c] = args[c];
			}
			
			/*if (fork()>0)
			{*/
				libevent_handlers.item[a].handler(argc, argv);
			/*}*/
			return true; 
		}
	}

	return true;
}

int libevent_call_handler(int argc, char **argv)
{
	char module[] = "libevent_call_handler";
	int a;

	if (argc == 0)
	{
		TRC(TRC_ERR, module, "Argc = 0!");
		return false;
	}
	
	for (a = 0; a < MAX_HANDLERS; a++)
	{
		if (libevent_handlers.item[a].handler != NULL &&
				strncmp(libevent_handlers.item[a].event, 
								argv[0],
								strlen(libevent_handlers.item[a].event)) == 0)
		{
			return libevent_handlers.item[a].handler(argc, argv);
		}
	}

	return true;
}