/*** $Id: ads.c,v 1.15 2003/11/21 12:15:37 weiym Exp $**** ads.c: Low Level Input Engine for ADS Graphics Client.** ** Copyright (C) 2000, Wei Yongming ** Copyright (C) 2000, 2001, BluePoint Software.**** Created by Wei Yongming, 2000/08/24**** After some hard work, this engine now runs well.*//*** 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 <stdio.h>#include <stdlib.h>#include <string.h>#include <unistd.h>#include <fcntl.h>#include "common.h"#ifdef _ADS_IAL#include <sys/ioctl.h>#include <sys/poll.h>#include <sys/types.h>#include <sys/stat.h>#include "misc.h"#include "ads_internal.h"#include "ial.h"#include "ads.h"static int ts;static int mousex = 0;static int mousey = 0;static POS pos;/************************  Low Level Input Operations **********************//* * Mouse operations -- Event */static int mouse_update(void){	return 1;}static void mouse_getxy(int* x, int* y){	*x = mousex;	*y = mousey;}static int mouse_getbutton(void){	return pos.b;}static int keyboard_update(void){	return 0;}static const char * keyboard_getstate(void){	return NULL;}#ifdef _LITE_VERSION static int wait_event (int which, int maxfd, fd_set *in, fd_set *out, fd_set *except,                struct timeval *timeout){	fd_set rfds;	int	e;    if (!in) {        in = &rfds;        FD_ZERO (in);    }	if (which & IAL_MOUSEEVENT) {		FD_SET (ts, in);        if (ts > maxfd) maxfd = ts;	}	e = select (maxfd + 1, in, out, except, timeout) ;	if (e > 0) { 		if (ts >= 0 && FD_ISSET (ts, in))		{            FD_CLR (ts, in);			read (ts, &pos, sizeof (POS));				if ( pos.x !=-1 && pos.y !=-1) {				mousex = pos.x;				mousey = pos.y;			}			pos.b = ( pos.b > 0 ? 4:0);			return IAL_MOUSEEVENT;		}	} else if (e < 0) {		return -1;	}	return 0;}#elsestatic int wait_event (int which, fd_set *in, fd_set *out, fd_set *except,                struct timeval *timeout){	struct pollfd ufd;	if ( (which & IAL_MOUSEEVENT) == IAL_MOUSEEVENT)	{		ufd.fd     = ts;		ufd.events = POLLIN; 		if ( poll (&ufd, 1, timeout) > 0)		{			read (ts, &pos, sizeof(POS));				return IAL_MOUSEEVENT;		}	}	return 0;}#endifBOOL InitADSInput (INPUT* input, const char* mdev, const char* mtype){	int i;		ts = open ("/dev/ts", O_RDONLY);    if ( ts < 0 ) {        fprintf (stderr, "IAL: Can not open touch screen!\n");        return FALSE;    }    input->update_mouse = mouse_update;    input->get_mouse_xy = mouse_getxy;    input->set_mouse_xy = NULL;    input->get_mouse_button = mouse_getbutton;    input->set_mouse_range = NULL;    input->update_keyboard = keyboard_update;    input->get_keyboard_state = keyboard_getstate;    input->set_leds = NULL;    input->wait_event = wait_event;	mousex = 0;	mousey = 0;    return TRUE;}void TermADSInput (void){	if ( ts >= 0 )		close(ts);}#endif /* _ADS_IAL */