[Qemu-devel] [PATCH v6 12/16] qapi: Consistent generated code: prefer common labels

[Eric Blake <eblake@redhat.com>]

We had some pointless differences in the generated code for visit,
command marshalling, and events; unifying them makes it easier for
future patches to consolidate to common helper functions.

This is patch 3/4, focusing on naming the goto labels 'out' (not
'clean') and 'out_obj' (not 'out_end').  Additionally, the generator
was inconsistent on whether labels had a leading space; prefer the
emacs style of including the space, so that only function names and
comments occur in column 1 of the generated file [HACKING gives no
preference, and both styles occur elsewhere in qemu.git].

No change in semantics to the generated code.

Signed-off-by: Eric Blake <eblake@redhat.com>

---
v6: split 9/46 into four patches, update docs where they are affected,
pick consistent spacing of label

Signed-off-by: Eric Blake <eblake@redhat.com>
---
 docs/qapi-code-gen.txt   |  8 ++++----
 scripts/qapi-commands.py |  4 ++--
 scripts/qapi-event.py    |  8 ++++----
 scripts/qapi-visit.py    | 14 +++++++-------
 4 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/docs/qapi-code-gen.txt b/docs/qapi-code-gen.txt
index 2afab20..fd390ef 100644
--- a/docs/qapi-code-gen.txt
+++ b/docs/qapi-code-gen.txt
@@ -836,7 +836,7 @@ Example:
             goto out;
         }

-    out:
+     out:
         error_propagate(errp, err);
     }

@@ -874,7 +874,7 @@ Example:
         error_propagate(errp, err);
         err = NULL;
         visit_end_list(v, &err);
-    out:
+     out:
         error_propagate(errp, err);
     }
     $ cat qapi-generated/example-qapi-visit.h
@@ -928,7 +928,7 @@ Example:
         }
         *ret_out = qmp_output_get_qobject(qov);

-    out:
+     out:
         error_propagate(errp, err);
         qmp_output_visitor_cleanup(qov);
         qdv = qapi_dealloc_visitor_new();
@@ -959,7 +959,7 @@ Example:

         qmp_marshal_output_UserDefOne(retval, ret, &err);

-    out:
+     out:
         error_propagate(errp, err);
         qmp_input_visitor_cleanup(qiv);
         qdv = qapi_dealloc_visitor_new();
diff --git a/scripts/qapi-commands.py b/scripts/qapi-commands.py
index 475735d..8fab1ce 100644
--- a/scripts/qapi-commands.py
+++ b/scripts/qapi-commands.py
@@ -183,7 +183,7 @@ static void qmp_marshal_output_%(c_name)s(%(c_type)s ret_in, QObject **ret_out,
     }
     *ret_out = qmp_output_get_qobject(qov);

-out:
+ out:
     error_propagate(errp, err);
     qmp_output_visitor_cleanup(qov);
     qdv = qapi_dealloc_visitor_new();
@@ -224,7 +224,7 @@ def gen_marshal(name, arg_type, ret_type):
     if re.search('^ *goto out;', ret, re.MULTILINE):
         ret += mcgen('''

-out:
+ out:
 ''')
     ret += mcgen('''
     error_propagate(errp, err);
diff --git a/scripts/qapi-event.py b/scripts/qapi-event.py
index d41af40..b43bbc2 100644
--- a/scripts/qapi-event.py
+++ b/scripts/qapi-event.py
@@ -69,7 +69,7 @@ def gen_event_send(name, arg_type):
     /* Fake visit, as if all members are under a structure */
     visit_start_struct(v, NULL, "", "%(name)s", 0, &err);
     if (err) {
-        goto clean;
+        goto out;
     }

 ''',
@@ -92,7 +92,7 @@ def gen_event_send(name, arg_type):
             ret += mcgen('''
     visit_type_%(c_type)s(v, %(cast)s&%(c_name)s, "%(name)s", &err);
     if (err) {
-        goto clean;
+        goto out;
     }
 ''',
                          cast=cast,
@@ -110,7 +110,7 @@ def gen_event_send(name, arg_type):

     visit_end_struct(v, &err);
     if (err) {
-        goto clean;
+        goto out;
     }

     obj = qmp_output_get_qobject(qov);
@@ -127,7 +127,7 @@ def gen_event_send(name, arg_type):

     if arg_type and arg_type.members:
         ret += mcgen('''
- clean:
+ out:
     qmp_output_visitor_cleanup(qov);
 ''')
     ret += mcgen('''
diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py
index 348efe0..a5d7be1 100644
--- a/scripts/qapi-visit.py
+++ b/scripts/qapi-visit.py
@@ -118,7 +118,7 @@ if (err) {
     if re.search('^ *goto out;', ret, re.MULTILINE):
         ret += mcgen('''

-out:
+ out:
 ''')
     ret += mcgen('''
     error_propagate(errp, err);
@@ -178,7 +178,7 @@ void visit_type_%(c_name)s(Visitor *v, %(c_name)s **obj, const char *name, Error
     error_propagate(errp, err);
     err = NULL;
     visit_end_list(v, &err);
-out:
+ out:
     error_propagate(errp, err);
 }
 ''',
@@ -209,7 +209,7 @@ void visit_type_%(c_name)s(Visitor *v, %(c_name)s **obj, const char *name, Error
     }
     visit_get_next_type(v, (int*) &(*obj)->kind, %(c_name)s_qtypes, name, &err);
     if (err) {
-        goto out_end;
+        goto out_obj;
     }
     switch ((*obj)->kind) {
 ''',
@@ -230,11 +230,11 @@ void visit_type_%(c_name)s(Visitor *v, %(c_name)s **obj, const char *name, Error
     default:
         abort();
     }
-out_end:
+ out_obj:
     error_propagate(errp, err);
     err = NULL;
     visit_end_implicit_struct(v, &err);
-out:
+ out:
     error_propagate(errp, err);
 }
 ''')
@@ -326,7 +326,7 @@ void visit_type_%(c_name)s(Visitor *v, %(c_name)s **obj, const char *name, Error
         default:
             abort();
         }
-out_obj:
+ out_obj:
         error_propagate(errp, err);
         err = NULL;
         visit_end_union(v, !!(*obj)->data, &err);
@@ -334,7 +334,7 @@ out_obj:
         err = NULL;
     }
     visit_end_struct(v, &err);
-out:
+ out:
     error_propagate(errp, err);
 }
 ''')
-- 
2.4.3