[PATCH] qmi-codegen: allow empty input fields

[Aleksander Morgado]

The LOC service allows empty messages to trigger the sending of
certain indicator messages.

E.g. we can have a request creation method where we just ignore the
input bundle:

    static QmiMessage *
    __qmi_message_loc_get_operation_mode_request_create (
        guint16 transaction_id,
        guint8 cid,
        QmiMessageLocGetOperationModeInput *input,
        GError **error)
    {
        QmiMessage *self;

        self = qmi_message_new (QMI_SERVICE_LOC,
                                cid,
                                transaction_id,
                                QMI_MESSAGE_LOC_GET_OPERATION_MODE);

        return self;
    }

Based on a patch from: Thomas Weißschuh <thomas at t-8ch.de>
---

Hey Thomas,

Wouldn't this change I suggested be enough for your use case? I still believe that not emitting the code that generates the label would be a cleaner option that starting to add G_GNUC_UNUSED to ignore the unused ones...

---
 build-aux/qmi-codegen/Message.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/build-aux/qmi-codegen/Message.py b/build-aux/qmi-codegen/Message.py
index 0bf62f1..ea6622b 100644
--- a/build-aux/qmi-codegen/Message.py
+++ b/build-aux/qmi-codegen/Message.py
@@ -121,7 +121,7 @@ class Message:
             '                            ${message_id});\n' % input_arg_template)
         cfile.write(string.Template(template).substitute(translations))

-        if self.input.fields is not None:
+        if self.input.fields:
             # Count how many mandatory fields we have
             n_mandatory = 0
             for field in self.input.fields:
@@ -179,7 +179,7 @@ class Message:
         cfile.write(
             '\n'
             '    return self;\n')
-        if self.input.fields is not None:
+        if self.input.fields:
             cfile.write(
                 '\n'
                 'error_out:\n'
--
2.15.1