From: Markus Armbruster <arm...@redhat.com>
gen_visit_union() is now just like gen_visit_struct() plus additional
code to handle variants. Make that code conditional on variants, so
gen_visit_union() does exactly the same for structs as
gen_visit_struct(). Rename it to gen_visit_object(), use it for
structs, and drop gen_visit_struct().
Output is slightly changed due to an earlier placement of the
'out_obj' label for structs, but with no semantic impact:
| if (err) {
| goto out;
| }
| if (!*obj) {
| goto out_obj;
| }
| visit_type_ACPIOSTInfo_fields(v, obj, &err);
|+out_obj:
| error_propagate(errp, err);
| err = NULL;
|-out_obj:
| visit_end_struct(v, &err);
| out:
Signed-off-by: Markus Armbruster <arm...@redhat.com>
Message-Id: <1453902888-20457-4-git-send-email-arm...@redhat.com>
[rebase to earlier changes]
Signed-off-by: Eric Blake <ebl...@redhat.com>
---
v10: new patch, replacing 31/37
---
scripts/qapi-visit.py | 96 ++++++++++++++++++---------------------------------
1 file changed, 34 insertions(+), 62 deletions(-)
diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py
index 0530f2b..786fe57 100644
--- a/scripts/qapi-visit.py
+++ b/scripts/qapi-visit.py
@@ -111,40 +111,6 @@ out:
return ret
-def gen_visit_struct(name, base, members):
- ret = gen_visit_struct_fields(name, base, members)
-
- # FIXME: if *obj is NULL on entry, and visit_start_struct() assigns to
- # *obj, but then visit_type_FOO_fields() fails, we should clean up *obj
- # rather than leaving it non-NULL. As currently written, the caller must
- # call qapi_free_FOO() to avoid a memory leak of the partial FOO.
- ret += mcgen('''
-
-void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj,
Error **errp)
-{
- Error *err = NULL;
-
- visit_start_struct(v, name, (void **)obj, sizeof(%(c_name)s), &err);
- if (err) {
- goto out;
- }
- if (!*obj) {
- goto out_obj;
- }
- visit_type_%(c_name)s_fields(v, obj, &err);
- error_propagate(errp, err);
- err = NULL;
-out_obj:
- visit_end_struct(v, &err);
-out:
- error_propagate(errp, err);
-}
-''',
- c_name=c_name(name))
-
- return ret
-
-
def gen_visit_list(name, element_type):
# FIXME: if *obj is NULL on entry, and the first visit_next_list()
# assigns to *obj, while a later one fails, we should clean up *obj
@@ -240,14 +206,19 @@ out:
return ret
-def gen_visit_union(name, base, members, variants):
+def gen_visit_object(name, base, members, variants):
ret = gen_visit_struct_fields(name, base, members)
- for var in variants.variants:
- # Ugly special case for simple union TODO get rid of it
- if not var.simple_union_type():
- ret += gen_visit_implicit_struct(var.type)
+ if variants:
+ for var in variants.variants:
+ # Ugly special case for simple union TODO get rid of it
+ if not var.simple_union_type():
+ ret += gen_visit_implicit_struct(var.type)
+ # FIXME: if *obj is NULL on entry, and visit_start_struct() assigns to
+ # *obj, but then visit_type_FOO_fields() fails, we should clean up *obj
+ # rather than leaving it non-NULL. As currently written, the caller must
+ # call qapi_free_FOO() to avoid a memory leak of the partial FOO.
ret += mcgen('''
void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj,
Error **errp)
@@ -264,43 +235,47 @@ void visit_type_%(c_name)s(Visitor *v, const char *name,
%(c_name)s **obj, Error
visit_type_%(c_name)s_fields(v, obj, &err);
''',
c_name=c_name(name))
- ret += gen_err_check(label='out_obj')
- ret += mcgen('''
+ if variants:
+ ret += gen_err_check(label='out_obj')
+ ret += mcgen('''
if (!visit_start_union(v, !!(*obj)->u.data, &err) || err) {
goto out_obj;
}
switch ((*obj)->%(c_name)s) {
''',
- c_name=c_name(variants.tag_member.name))
+ c_name=c_name(variants.tag_member.name))
- for var in variants.variants:
- # TODO ugly special case for simple union
- simple_union_type = var.simple_union_type()
- ret += mcgen('''
+ for var in variants.variants:
+ # TODO ugly special case for simple union
+ simple_union_type = var.simple_union_type()
+ ret += mcgen('''
case %(case)s:
''',
- case=c_enum_const(variants.tag_member.type.name,
- var.name))
- if simple_union_type:
- ret += mcgen('''
+ case=c_enum_const(variants.tag_member.type.name,
+ var.name))
+ if simple_union_type:
+ ret += mcgen('''
visit_type_%(c_type)s(v, "data", &(*obj)->u.%(c_name)s, &err);
''',
- c_type=simple_union_type.c_name(),
- c_name=c_name(var.name))
- else:
- ret += mcgen('''
+ c_type=simple_union_type.c_name(),
+ c_name=c_name(var.name))
+ else:
+ ret += mcgen('''
visit_type_implicit_%(c_type)s(v, &(*obj)->u.%(c_name)s, &err);
''',
- c_type=var.type.c_name(),
- c_name=c_name(var.name))
- ret += mcgen('''
+ c_type=var.type.c_name(),
+ c_name=c_name(var.name))
+ ret += mcgen('''
break;
''')
- ret += mcgen('''
+ ret += mcgen('''
default:
abort();
}
+''')
+
+ ret += mcgen('''
out_obj:
error_propagate(errp, err);
err = NULL;
@@ -362,10 +337,7 @@ class QAPISchemaGenVisitVisitor(QAPISchemaVisitor):
def visit_object_type(self, name, info, base, members, variants):
self.decl += gen_visit_decl(name)
- if variants:
- self.defn += gen_visit_union(name, base, members, variants)
- else:
- self.defn += gen_visit_struct(name, base, members)
+ self.defn += gen_visit_object(name, base, members, variants)
def visit_alternate_type(self, name, info, variants):
self.decl += gen_visit_decl(name)
--
2.5.0
