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/*
* %W% %E%
*
* Copyright 2002 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
/*****************************************************************************
* Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistribution of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materails provided with the distribution.
*
* Neither the name Sun Microsystems, Inc. or the names of the contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind.
* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
* ANY IMPLIED WARRANT OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMEN, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND
* ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS
* A RESULT OF USING, MODIFYING OR DESTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
* REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
* INCIDENTAL OR PUNITIVE DAMAGES. HOWEVER CAUSED AND REGARDLESS OF THE THEORY
* OF LIABILITY, ARISING OUT OF THE USE OF OUR INABILITY TO USE THIS SOFTWARE,
* EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for us in
* the design, construction, operation or maintenance of any nuclear facility
*
*****************************************************************************/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/joystick.h>
#include "util.h"
#include "net_java_games_input_LinuxJoystickDevice.h"
JNIEXPORT jlong JNICALL Java_net_java_games_input_LinuxJoystickDevice_nOpen(JNIEnv *env, jclass unused, jstring path) {
const char *path_str = (*env)->GetStringUTFChars(env, path, NULL);
if (path_str == NULL)
return -1;
int fd = open(path_str, O_RDONLY | O_NONBLOCK);
if (fd == -1)
throwIOException(env, "Failed to open device %s (%d)\n", path_str, errno);
(*env)->ReleaseStringUTFChars(env, path, path_str);
return fd;
}
JNIEXPORT void JNICALL Java_net_java_games_input_LinuxJoystickDevice_nClose(JNIEnv *env, jclass unused, jlong fd_address) {
int fd = (int)fd_address;
int result = close(fd);
if (result == -1)
throwIOException(env, "Failed to close device (%d)\n", errno);
}
JNIEXPORT jstring JNICALL Java_net_java_games_input_LinuxJoystickDevice_nGetName(JNIEnv *env, jclass unused, jlong fd_address) {
#define BUFFER_SIZE 1024
int fd = (int)fd_address;
char device_name[BUFFER_SIZE];
if (ioctl(fd, JSIOCGNAME(BUFFER_SIZE), device_name) == -1) {
throwIOException(env, "Failed to get device name (%d)\n", errno);
return NULL;
}
jstring jstr = (*env)->NewStringUTF(env, device_name);
return jstr;
}
JNIEXPORT jint JNICALL Java_net_java_games_input_LinuxJoystickDevice_nGetVersion(JNIEnv *env, jclass unused, jlong fd_address) {
int fd = (int)fd_address;
__u32 version;
if (ioctl(fd, JSIOCGVERSION, &version) == -1) {
throwIOException(env, "Failed to get device version (%d)\n", errno);
return -1;
}
return version;
}
JNIEXPORT jint JNICALL Java_net_java_games_input_LinuxJoystickDevice_nGetNumButtons(JNIEnv *env, jclass unused, jlong fd_address) {
int fd = (int)fd_address;
__u8 num_buttons;
if (ioctl(fd, JSIOCGBUTTONS, &num_buttons) == -1) {
throwIOException(env, "Failed to get number of buttons (%d)\n", errno);
return -1;
}
return num_buttons;
}
JNIEXPORT jint JNICALL Java_net_java_games_input_LinuxJoystickDevice_nGetNumAxes(JNIEnv *env, jclass unused, jlong fd_address) {
int fd = (int)fd_address;
__u8 num_axes;
if (ioctl(fd, JSIOCGAXES, &num_axes) == -1) {
throwIOException(env, "Failed to get number of buttons (%d)\n", errno);
return -1;
}
return num_axes;
}
JNIEXPORT jboolean JNICALL Java_net_java_games_input_LinuxJoystickDevice_nGetNextEvent(JNIEnv *env, jclass unused, jlong fd_address, jobject event_return) {
int fd = (int)fd_address;
jclass event_class = (*env)->GetObjectClass(env, event_return);
if (event_class == NULL)
return JNI_FALSE;
jmethodID event_set = (*env)->GetMethodID(env, event_class, "set", "(JIII)V");
if (event_set == NULL)
return JNI_FALSE;
struct js_event event;
if (read(fd, &event, sizeof(event)) == -1) {
if (errno == EAGAIN)
return JNI_FALSE;
throwIOException(env, "Failed to read next device event (%d)\n", errno);
return JNI_FALSE;
}
(*env)->CallVoidMethod(env, event_return, event_set, (jlong)event.time, (jint)event.value, (jint)event.type, (jint)event.number);
return JNI_TRUE;
}
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