python: Return correct PacketPayload subclasses from Packet.payload()

[libsigrok.git] / bindings / python / sigrok / core / classes.i

diff --git a/bindings/python/sigrok/core/classes.i b/bindings/python/sigrok/core/classes.i
index 3c327e4d4c50222b074961757d6cccb1d5659211..7a6eb22ba3789ecb54f8c8d6b745831571f4a497 100644 (file)
--- a/bindings/python/sigrok/core/classes.i
+++ b/bindings/python/sigrok/core/classes.i
@@ -173,15 +173,29 @@ typedef guint pyg_flags_type;
         Py_XDECREF(arglist);
         Py_XDECREF(revents_obj);
 
-        if (PyErr_Occurred() || !PyBool_Check(result))
-            throw sigrok::Error(SR_ERR);
+        bool completed = !PyErr_Occurred();
+
+        if (!completed)
+            PyErr_Print();
+
+        bool valid_result = (completed && PyBool_Check(result));
+
+        if (completed && !valid_result)
+        {
+            PyErr_SetString(PyExc_TypeError,
+                "EventSource callback did not return a boolean");
+            PyErr_Print();
+        }
 
-        bool retval = (result == Py_True);
+        bool retval = (valid_result && result == Py_True);
 
         Py_XDECREF(result);
 
         PyGILState_Release(gstate);
 
+        if (!valid_result)
+            throw sigrok::Error(SR_ERR);
+
         return retval;
     };
 
@@ -212,9 +226,27 @@ typedef guint pyg_flags_type;
         Py_XDECREF(arglist);
         Py_XDECREF(log_obj);
         Py_XDECREF(string_obj);
+
+        bool completed = !PyErr_Occurred();
+
+        if (!completed)
+            PyErr_Print();
+
+        bool valid_result = (completed && result == Py_None);
+
         Py_XDECREF(result);
 
+        if (completed && !valid_result)
+        {
+            PyErr_SetString(PyExc_TypeError,
+                "Log callback did not return None");
+            PyErr_Print();
+        }
+
         PyGILState_Release(gstate);
+
+        if (!valid_result)
+            throw sigrok::Error(SR_ERR);
     };
 
     Py_XINCREF($input);
@@ -248,14 +280,75 @@ typedef guint pyg_flags_type;
         Py_XDECREF(arglist);
         Py_XDECREF(device_obj);
         Py_XDECREF(packet_obj);
+
+        bool completed = !PyErr_Occurred();
+
+        if (!completed)
+            PyErr_Print();
+
+        bool valid_result = (completed && result == Py_None);
+
         Py_XDECREF(result);
 
+        if (completed && !valid_result)
+        {
+            PyErr_SetString(PyExc_TypeError,
+                "Datafeed callback did not return None");
+            PyErr_Print();
+        }
+
         PyGILState_Release(gstate);
+
+        if (!valid_result)
+            throw sigrok::Error(SR_ERR);
     };
 
     Py_XINCREF($input);
 }
 
+/* Cast PacketPayload pointers to correct subclass type. */
+%ignore sigrok::Packet::payload;
+
+%extend sigrok::Packet
+{
+    std::shared_ptr<sigrok::Header> _payload_header()
+    {
+        return dynamic_pointer_cast<sigrok::Header>($self->payload());
+    }
+    std::shared_ptr<sigrok::Meta> _payload_meta()
+    {
+        return dynamic_pointer_cast<sigrok::Meta>($self->payload());
+    }
+    std::shared_ptr<sigrok::Analog> _payload_analog()
+    {
+        return dynamic_pointer_cast<sigrok::Analog>($self->payload());
+    }
+    std::shared_ptr<sigrok::Logic> _payload_logic()
+    {
+        return dynamic_pointer_cast<sigrok::Logic>($self->payload());
+    }
+}
+
+%extend sigrok::Packet
+{
+%pythoncode
+{
+    def _payload(self):
+        if self.type == PacketType.HEADER:
+            return self._payload_header()
+        elif self.type == PacketType.META:
+            return self._payload_meta()
+        elif self.type == PacketType.LOGIC:
+            return self._payload_logic()
+        elif self.type == PacketType.ANALOG:
+            return self._payload_analog()
+        else:
+            return None
+
+    payload = property(_payload)
+}
+}
+
 %{
 
 #include "libsigrok/libsigrok.hpp"
@@ -360,11 +453,44 @@ std::map<std::string, Glib::VariantBase> dict_to_map_options(PyObject *dict,
 %include "doc.i"
 
 %define %attributevector(Class, Type, Name, Get)
-%attributeval(sigrok::Class, Type, Name, Get);
+%rename(_ ## Get) sigrok::Class::Get;
+%extend sigrok::Class
+{
+%pythoncode
+{
+  Name = property(_ ## Get)
+}
+}
 %enddef
 
 %define %attributemap(Class, Type, Name, Get)
-%attributeval(sigrok::Class, Type, Name, Get);
+%rename(_ ## Get) sigrok::Class::Get;
+%extend sigrok::Class
+{
+%pythoncode
+{
+  Name = property(fget = lambda x: x._ ## Get().asdict(), doc=_ ## Get.__doc__)
+}
+}
+%enddef
+
+%define %enumextras(Class)
+%extend sigrok::Class
+{
+  long __hash__()
+  {
+    return (long) $self;
+  }
+
+%pythoncode
+{
+  def __eq__(self, other):
+    return (type(self) is type(other) and hash(self) == hash(other))
+
+  def __ne__(self, other):
+    return (type(self) is not type(other) or hash(self) != hash(other))
+}
+}
 %enddef
 
 %include "../../../swig/classes.i"