Move some MIDI mapper protobuf reflection code into a shared helper.

[nageru] / shared / midi_mapper_util.h

diff --git a/shared/midi_mapper_util.h b/shared/midi_mapper_util.h
new file mode 100644 (file)
index 0000000..bc9b1bf
--- /dev/null
+++ b/shared/midi_mapper_util.h
@@ -0,0 +1,49 @@
+#ifndef _MIDI_MAPPER_UTIL_H
+#define _MIDI_MAPPER_UTIL_H 1
+
+#include "midi_mapping.pb.h"
+
+#include <google/protobuf/descriptor.h>
+
+template <class Proto>
+inline bool match_controller_helper(const Proto &msg, int field_number, int controller)
+{
+       using namespace google::protobuf;
+       const FieldDescriptor *descriptor = msg.GetDescriptor()->FindFieldByNumber(field_number);
+       const Reflection *reflection = msg.GetReflection();
+       if (!reflection->HasField(msg, descriptor)) {
+               return false;
+       }
+       const MIDIControllerProto &controller_proto =
+               static_cast<const MIDIControllerProto &>(reflection->GetMessage(msg, descriptor));
+       return (controller_proto.controller_number() == controller);
+}
+
+template <class Proto>
+inline bool match_button_helper(const Proto &msg, int field_number, int note)
+{
+       using namespace google::protobuf;
+       const FieldDescriptor *descriptor = msg.GetDescriptor()->FindFieldByNumber(field_number);
+       const Reflection *reflection = msg.GetReflection();
+       if (!reflection->HasField(msg, descriptor)) {
+               return false;
+       }
+       const MIDIButtonProto &button_proto =
+               static_cast<const MIDIButtonProto &>(reflection->GetMessage(msg, descriptor));
+       return (button_proto.note_number() == note);
+}
+
+template <class Proto>
+inline bool match_bank_helper(const Proto &msg, int bank_field_number, int bank)
+{
+       using namespace google::protobuf;
+       const FieldDescriptor *bank_descriptor = msg.GetDescriptor()->FindFieldByNumber(bank_field_number);
+       const Reflection *reflection = msg.GetReflection();
+       if (!reflection->HasField(msg, bank_descriptor)) {
+               // No bank set => in all banks.
+               return true;
+       }
+       return reflection->GetInt32(msg, bank_descriptor) == bank;
+}
+
+#endif  // !defined(_MIDI_MAPPER_UTIL_H)