JNIEXPORT jint JNICALL Java_de_entropia_can_CanSocket__1discoverInterfaceIndex
(JNIEnv *env, jclass clazz, jint socketFd, jstring ifName)
{
struct ifreq ifreq;
const jsize ifNameSize = env->GetStringUTFLength(ifName);
if (ifNameSize > IFNAMSIZ-1) {
throwIllegalArgumentException(env, "illegal interface name");
return -1;
}
/* fetch interface name */
memset(&ifreq, 0x0, sizeof(ifreq));
env->GetStringUTFRegion(ifName, 0, ifNameSize,
ifreq.ifr_name);
if (env->ExceptionCheck() == JNI_TRUE) {
return -1;
}
/* discover interface id */
const int err = ioctl(socketFd, SIOCGIFINDEX, &ifreq);
if (err == -1) {
throwIOExceptionErrno(env, errno);
return -1;
} else {
return ifreq.ifr_ifindex;
}
}
/*
* Class: eu_vandertil_jerasure_jni_Cauchy
* Method: cauchy_original_coding_matrix
* Signature: (III)[I
*/
JNIEXPORT jintArray JNICALL Java_eu_vandertil_jerasure_jni_Cauchy_cauchy_1original_1coding_1matrix
(JNIEnv *env, jclass clazz, jint k, jint m, jint w)
{
bool outOfMemory = false;
jintArray result = NULL;
if (!(w < 31 && (k+m) > (1 << w))) { // from implementation.
int* matrix = cauchy_original_coding_matrix(k, m, w);
if(matrix != NULL) {
result = env->NewIntArray(k*m);
if(result != NULL) {
env->SetIntArrayRegion(result, 0, k*m, (jint*)matrix);
} else {
outOfMemory = true;
}
} else {
outOfMemory = true;
}
free(matrix);
} else {
throwIllegalArgumentException(env, "w < 31 && (k+m) > (1 << w)");
}
if(outOfMemory) {
throwOutOfMemoryError(env, "Not enough free memory to complete");
}
return result;
}
JNIEXPORT jobject JNICALL Java_de_entropia_can_CanSocket__1recvFrame
(JNIEnv *env, jclass obj, jint fd)
{
const int flags = 0;
ssize_t nbytes;
struct sockaddr_can addr;
socklen_t len = sizeof(addr);
struct can_frame frame;
memset(&addr, 0, sizeof(addr));
memset(&frame, 0, sizeof(frame));
nbytes = recvfrom(fd, &frame, sizeof(frame), flags,
reinterpret_cast<struct sockaddr *>(&addr), &len);
if (len != sizeof(addr)) {
throwIllegalArgumentException(env, "illegal AF_CAN address");
return nullptr;
}
if (nbytes == -1) {
throwIOExceptionErrno(env, errno);
return nullptr;
} else if (nbytes != sizeof(frame)) {
throwIOExceptionMsg(env, "invalid length of received frame");
return nullptr;
}
const jsize fsize = static_cast<jsize>(std::min(static_cast<size_t>(frame.can_dlc),
nbytes - offsetof(struct can_frame, data)));
const jclass can_frame_clazz = env->FindClass("de/entropia/can/"
"CanSocket$CanFrame");
if (can_frame_clazz == nullptr) {
return nullptr;
}
const jmethodID can_frame_cstr = env->GetMethodID(can_frame_clazz,
"<init>", "(II[B)V");
if (can_frame_cstr == nullptr) {
return nullptr;
}
const jbyteArray data = env->NewByteArray(fsize);
if (data == nullptr) {
if (env->ExceptionCheck() != JNI_TRUE) {
throwOutOfMemoryError(env, "could not allocate ByteArray");
}
return nullptr;
}
env->SetByteArrayRegion(data, 0, fsize, reinterpret_cast<jbyte *>(&frame.data));
if (env->ExceptionCheck() == JNI_TRUE) {
return nullptr;
}
const jobject ret = env->NewObject(can_frame_clazz, can_frame_cstr,
addr.can_ifindex, frame.can_id,
data);
return ret;
}
JNIEXPORT jint JNICALL Java_de_entropia_can_CanSocket__1getsockopt
(JNIEnv *env, jclass obj, jint fd, jint op)
{
int _stat = 0;
socklen_t len = sizeof(_stat);
if (getsockopt(fd, SOL_CAN_RAW, op, &_stat, &len) == -1) {
throwIOExceptionErrno(env, errno);
}
if (len != sizeof(_stat)) {
throwIllegalArgumentException(env, "setsockopt return size is different");
return -1;
}
return _stat;
}
static void readBitmapPixels(JNIEnv* env, jclass /* clazz */, jobject jbitmap, jint fd) {
// Read the info.
AndroidBitmapInfo readInfo;
bool read = readAllBytes(fd, (void*) &readInfo, sizeof(AndroidBitmapInfo));
if (!read) {
throwIllegalStateException(env, (char*) "Cannot read bitmap info");
return;
}
// Get the info of the target bitmap.
AndroidBitmapInfo targetInfo;
int result = AndroidBitmap_getInfo(env, jbitmap, &targetInfo);
if (result < 0) {
throwIllegalStateException(env, (char*) "Cannot get bitmap info");
return;
}
// Enforce we can reuse the bitmap.
if (readInfo.width != targetInfo.width || readInfo.height != targetInfo.height
|| readInfo.stride != targetInfo.stride || readInfo.format != targetInfo.format
|| readInfo.flags != targetInfo.flags) {
throwIllegalArgumentException(env, (char*) "Cannot reuse bitmap");
return;
}
// Lock the pixels.
void* pixels;
result = AndroidBitmap_lockPixels(env, jbitmap, &pixels);
if (result < 0) {
throwIllegalStateException(env, (char*) "Cannot lock bitmap pixels");
return;
}
// Read the pixels.
size_t byteCount = readInfo.stride * readInfo.height;
read = readAllBytes(fd, (void*) pixels, byteCount);
if (!read) {
throwIllegalStateException(env, (char*) "Cannot read bitmap pixels");
return;
}
// Unlock the pixels.
result = AndroidBitmap_unlockPixels(env, jbitmap);
if (result < 0) {
throwIllegalStateException(env, (char*) "Cannot unlock bitmap pixels");
}
}
static int throwIfBadSlot(JNIEnv *env, jint slot)
{
if (slot>=slots.nslots) {
throwIllegalArgumentException(env, "bogus slot");
return 1;
}
if ((void*)0 == slots.slots[slot]) {
jclass newExcCls = (*env)->FindClass(env, "java/lang/IllegalArgumentException");
if (newExcCls == 0) /* Unable to find the new exception class, give up. */
return 1;
(*env)->ThrowNew(env, newExcCls, "slot is already empty");
return 1;
}
return 0; // the slot is good
}
JNIEXPORT jint JNICALL Java_de_entropia_can_CanSocket__1fetchInterfaceMtu
(JNIEnv *env, jclass obj, jint fd, jstring ifName)
{
struct ifreq ifreq;
const jsize ifNameSize = env->GetStringUTFLength(ifName);
if (ifNameSize > IFNAMSIZ-1) {
throwIllegalArgumentException(env, "illegal interface name");
return -1;
}
memset(&ifreq, 0x0, sizeof(ifreq));
env->GetStringUTFRegion(ifName, 0, ifNameSize, ifreq.ifr_name);
if (env->ExceptionCheck() == JNI_TRUE) {
return -1;
}
if (ioctl(fd, SIOCGIFMTU, &ifreq) == -1) {
throwIOExceptionErrno(env, errno);
return -1;
} else {
return ifreq.ifr_mtu;
}
}
/*
* Class: com_diozero_pigpioj_PigpioGpio
* Method: setISRFunc
* Signature: (IIILorg/diozero/internal/provider/pigpio/impl/PigpioCallback;)I
*/
JNIEXPORT jint JNICALL Java_com_diozero_pigpioj_PigpioGpio_setISRFunc
(JNIEnv* env, jclass clz, jint gpio, jint edge, jint timeout, jobject listener) {
if (listener == NULL) {
gpioSetISRFunc(gpio, edge, timeout, NULL);
if (listeners[gpio] != NULL) {
(*env)->DeleteGlobalRef(env, listeners[gpio]);
listeners[gpio] = NULL;
}
return 0;
}
// Validate the listener object has the appropriate method signature
jclass listener_class = (*env)->GetObjectClass(env, listener);
if (listener_class == NULL) {
printf("PigpioGpio Native: Error: setISRFunc(%d) could not get listener class\n", gpio);
throwRuntimeException(env, "Error in setISRFunc, could not get class for listener object");
return -1;
}
// Verify that the object has a 'void callback(int, boolean, long, long)' method
jmethodID callback_method = (*env)->GetMethodID(env, listener_class, "callback", "(IZJJ)V");
if (callback_method == NULL) {
printf("PigpioGpio Native: Error: setISRFunc(%d) could not get callback method id\n", gpio);
throwIllegalArgumentException(env, "Error in setISRFunc, could not get listener method id callback(IZJJ)V");
return -1;
}
// Remove the previous listener if there was one
if (listeners[gpio] != NULL) {
gpioSetISRFunc(gpio, edge, timeout, NULL);
(*env)->DeleteGlobalRef(env, listeners[gpio]);
listeners[gpio] = NULL;
}
// Register the new listener and pigpio callback
listeners[gpio] = (*env)->NewGlobalRef(env, listener);
return gpioSetISRFunc(gpio, edge, timeout, callbackFunction);
}