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/*
* Copyright (C) 2009 Sony Computer Entertainment Inc.
* Copyright 2009 Sony Corp.
*
* 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; version 2 of the License.
*
* 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
*/
#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
#define _GNU_SOURCE
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "log/log.h"
#include "talloc/talloc.h"
#include "joystick.h"
/**
* pjs_process_event - Read joystick event and map to UI key code.
*
* Returns a map routine UI key code or zero.
*/
int pjs_process_event(const struct pjs *pjs)
{
int result;
struct js_event e;
assert(pjs->fd);
result = read(pjs->fd, &e, sizeof(e));
if (result != sizeof(e)) {
pb_log("%s: read failed: %s\n", __func__, strerror(errno));
return 0;
}
return pjs->map(&e);
}
/**
* pjs_destructor - The talloc destructor for a joystick handler.
*/
static int pjs_destructor(void *arg)
{
struct pjs *pjs = pjs_from_arg(arg);
close(pjs->fd);
pjs->fd = 0;
return 0;
}
/**
* pjs_init - Initialize the joystick event handler.
*/
struct pjs *pjs_init(void *ctx, int (*map)(const struct js_event *))
{
static const char dev_name[] = "/dev/input/js0";
struct pjs *pjs;
pjs = talloc_zero(ctx, struct pjs);
if (!pjs)
return NULL;
pjs->map = map;
pjs->fd = open(dev_name, O_RDONLY | O_NONBLOCK);
if (pjs->fd < 0) {
pb_log("%s: open %s failed: %s\n", __func__, dev_name,
strerror(errno));
goto out_err;
}
talloc_set_destructor(pjs, pjs_destructor);
pb_log("%s: using %s\n", __func__, dev_name);
return pjs;
out_err:
close(pjs->fd);
pjs->fd = 0;
talloc_free(pjs);
return NULL;
}
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