/*
Receive a message part from a socket.
For a description of flags, see: http://api.zeromq.org/2-2:zmq-recv#toc2
*/
func (soc *Socket) RecvBytes(flags Flag) ([]byte, error) {
if !soc.opened {
return []byte{}, ErrorSocketClosed
}
var msg C.zmq_msg_t
if i, err := C.zmq_msg_init(&msg); i != 0 {
return []byte{}, errget(err)
}
defer C.zmq_msg_close(&msg)
var size C.int
var err error
var i C.int
i, err = C.zmq_recv(soc.soc, &msg, C.int(flags))
if i == 0 {
size = C.int(C.zmq_msg_size(&msg))
} else {
size = -1
}
if size < 0 {
return []byte{}, errget(err)
}
if size == 0 {
return []byte{}, nil
}
data := make([]byte, int(size))
C.my_memcpy(unsafe.Pointer(&data[0]), C.zmq_msg_data(&msg), C.size_t(size))
return data, nil
}
/*
Receive a message part with metadata.
This requires ZeroMQ version 4.1.0. Lower versions will return the message part without metadata.
The returned metadata map contains only those properties that exist on the message.
For a description of flags, see: http://api.zeromq.org/4-1:zmq-msg-recv#toc2
For a description of metadata, see: http://api.zeromq.org/4-1:zmq-msg-gets#toc3
*/
func (soc *Socket) RecvBytesWithMetadata(flags Flag, properties ...string) (msg []byte, metadata map[string]string, err error) {
if !soc.opened {
return []byte{}, map[string]string{}, ErrorSocketClosed
}
metadata = make(map[string]string)
var m C.zmq_msg_t
if i, err := C.zmq_msg_init(&m); i != 0 {
return []byte{}, metadata, errget(err)
}
defer C.zmq_msg_close(&m)
size, err := C.zmq_msg_recv(&m, soc.soc, C.int(flags))
if size < 0 {
return []byte{}, metadata, errget(err)
}
data := make([]byte, int(size))
if size > 0 {
C.zmq4_memcpy(unsafe.Pointer(&data[0]), C.zmq_msg_data(&m), C.size_t(size))
}
if minor > 0 {
for _, p := range properties {
ps := C.CString(p)
s, err := C.zmq_msg_gets(&m, ps)
if err == nil {
metadata[p] = C.GoString(s)
}
C.free(unsafe.Pointer(ps))
}
}
return data, metadata, nil
}
// Receive a message from the socket.
// int zmq_recv (void *s, zmq_msg_t *msg, int flags);
func (s *Socket) Recv(flags SendRecvOption) (data []byte, err error) {
// Allocate and initialise a new zmq_msg_t
var m C.zmq_msg_t
var rc C.int
if rc, err = C.zmq_msg_init(&m); rc != 0 {
err = casterr(err)
return
}
defer C.zmq_msg_close(&m)
// Receive into message
if rc, err = C.zmq_recvmsg(s.s, &m, C.int(flags)); rc == -1 {
err = casterr(err)
return
}
err = nil
// Copy message data into a byte array
// FIXME Ideally this wouldn't require a copy.
size := C.zmq_msg_size(&m)
if size > 0 {
data = make([]byte, int(size))
C.memcpy(unsafe.Pointer(&data[0]), C.zmq_msg_data(&m), size)
} else {
data = nil
}
return
}
// Receive a message from the socket.
// int zmq_recv (void *s, zmq_msg_t *msg, int flags);
func (s *zmqSocket) Recv(flags SendRecvOption) (data []byte, err error) {
// Allocate and initialise a new zmq_msg_t
err = nil
var m C.zmq_msg_t
if C.zmq_msg_init(&m) != 0 {
println("init")
err = errno()
return
}
defer C.zmq_msg_close(&m)
// Receive into message
if C.zmq_recvmsg(s.s, &m, C.int(flags)) != 0 {
println("recvmsg")
err = errno()
return
}
// Copy message data into a byte array
// FIXME Ideally this wouldn't require a copy.
size := C.zmq_msg_size(&m)
if size > 0 {
data = make([]byte, int(size))
C.memcpy(unsafe.Pointer(&data[0]), C.zmq_msg_data(&m), size)
} else {
data = nil
}
return
}
func (s *Socket) RecvEvent(flags SendRecvOption) (ty Event, addr string, ex int64, err error) {
// Allocate and initialise a new zmq_msg_t
var m C.zmq_msg_t
var rc C.int
if rc, err = C.zmq_msg_init(&m); rc != 0 {
err = casterr(err)
return
}
defer C.zmq_msg_close(&m)
// Receive into message
if rc, err = C.zmq_recvmsg(s.s, &m, C.int(flags)); rc == -1 {
err = casterr(err)
return
}
var ev *C.zmq_event_t
size := C.zmq_msg_size(&m)
if uintptr(size) != unsafe.Sizeof(*ev) {
err = errors.New("Invalid event message received")
return
}
err = nil
ev = (*C.zmq_event_t)(C.zmq_msg_data(&m))
ty = Event(ev.event)
addr = C.GoString(C.ev_get_addr(ev))
ex = int64(C.ev_get_extra(ev))
return
}
/*
Receive a message part from a socket.
For a description of flags, see: http://api.zeromq.org/3-2:zmq-msg-recv#toc2
*/
func (soc *Socket) RecvBytes(flags Flag) ([]byte, error) {
var msg C.zmq_msg_t
if i, err := C.zmq_msg_init(&msg); i != 0 {
return []byte{}, errget(err)
}
defer C.zmq_msg_close(&msg)
size, err := C.zmq_msg_recv(&msg, soc.soc, C.int(flags))
if size < 0 {
return []byte{}, errget(err)
}
if size == 0 {
return []byte{}, nil
}
data := make([]byte, int(size))
C.memcpy(unsafe.Pointer(&data[0]), C.zmq_msg_data(&msg), C.size_t(size))
return data, nil
}
// Send a message to the socket.
// int zmq_send (void *s, zmq_msg_t *msg, int flags);
func (s *zmqSocket) Send(data []byte, flags SendRecvOption) error {
var m C.zmq_msg_t
// Copy data array into C-allocated buffer.
size := C.size_t(len(data))
if C.zmq_msg_init_size(&m, size) != 0 {
return errno()
}
if size > 0 {
// FIXME Ideally this wouldn't require a copy.
C.memcpy(unsafe.Pointer(C.zmq_msg_data(&m)), unsafe.Pointer(&data[0]), size) // XXX I hope this works...(seems to)
}
if C.zmq_sendmsg(s.s, &m, C.int(flags)) != 0 {
// zmq_send did not take ownership, free message
C.zmq_msg_close(&m)
return errno()
}
return nil
}
func fromMsg(msg *C.zmq_msg_t) []byte {
defer C.zmq_msg_close(msg)
return C.GoBytes(C.zmq_msg_data(msg), C.int(C.zmq_msg_size(msg)))
}
func toMsg(msg *C.zmq_msg_t, data []byte) {
C.zmq_msg_init_size(msg, C.size_t(len(data)))
if len(data) > 0 {
C.memcpy(C.zmq_msg_data(msg), unsafe.Pointer(&data[0]), C.size_t(len(data)))
}
}
func MessageData(message ZMessage) ZMessageData {
return ZMessageData{C.zmq_msg_data(message.Ptr)}
}
func (p *lzmqMessage) data() uintptr {
return uintptr(C.zmq_msg_data(p.ptr()))
}
