Use range from evdev device for gamepad input

jni/nv_io/build.sh

@@ -0,0 +1,4 @@
+rm *.o libnv_io.so
+gcc -I $JAVA_HOME/include -I $JAVA_HOME/include/linux -fPIC -L. -c *.c
+gcc -shared -Wl,-soname,libnv_io.so -Wl,--no-undefined -o libnv_io.so *.o -L.
+rm *.o

jni/nv_io/nv_io_jni.c

@@ -0,0 +1,24 @@
+#include <fcntl.h>
+#include <jni.h>
+
+JNIEXPORT jboolean JNICALL
+Java_com_limelight_input_IO_ioctl(
+	JNIEnv *env, jobject this, // JNI parameters
+	jstring filename, jbyteArray buffer, jint request)
+{
+	const char* jni_filename = (*env)->GetStringUTFChars(env, filename, NULL);
+	unsigned char* jni_buffer = (*env)->GetByteArrayElements(env, buffer, NULL);
+
+	jboolean retval;
+	int fd;
+	if ((fd = open(jni_filename, O_RDONLY)) < 0) {
+		retval = 0;
+	} else {
+		ioctl(fd, request, jni_buffer);
+		close(fd);
+		retval = 1;
+	}
+
+	(*env)->ReleaseByteArrayElements(env, buffer, jni_buffer, 0);
+	return retval;
+}