diff options
Diffstat (limited to 'scripts/qapi-types.py')
| -rw-r--r-- | scripts/qapi-types.py | 37 |
1 files changed, 11 insertions, 26 deletions
diff --git a/scripts/qapi-types.py b/scripts/qapi-types.py index 946afab319..403768b89f 100644 --- a/scripts/qapi-types.py +++ b/scripts/qapi-types.py @@ -51,7 +51,7 @@ def gen_struct_field(member): return ret -def gen_struct_fields(local_members, base=None): +def gen_struct_fields(local_members, base): ret = '' if base: @@ -70,7 +70,7 @@ def gen_struct_fields(local_members, base=None): return ret -def gen_struct(name, base, members): +def gen_object(name, base, members, variants): ret = mcgen(''' struct %(c_name)s { @@ -79,11 +79,14 @@ struct %(c_name)s { ret += gen_struct_fields(members, base) + if variants: + ret += gen_variants(variants) + # Make sure that all structs have at least one field; this avoids # potential issues with attempting to malloc space for zero-length # structs in C, and also incompatibility with C++ (where an empty # struct is size 1). - if not (base and base.members) and not members: + if not (base and base.members) and not members and not variants: ret += mcgen(''' char qapi_dummy_field_for_empty_struct; ''') @@ -140,17 +143,7 @@ const int %(c_name)s_qtypes[QTYPE_MAX] = { return ret -def gen_union(name, base, variants): - ret = mcgen(''' - -struct %(c_name)s { -''', - c_name=c_name(name)) - if base: - ret += gen_struct_fields([], base) - else: - ret += gen_struct_field(variants.tag_member) - +def gen_variants(variants): # FIXME: What purpose does data serve, besides preventing a union that # has a branch named 'data'? We use it in qapi-visit.py to decide # whether to bypass the switch statement if visiting the discriminator @@ -159,11 +152,11 @@ struct %(c_name)s { # should not be any data leaks even without a data pointer. Or, if # 'data' is merely added to guarantee we don't have an empty union, # shouldn't we enforce that at .json parse time? - ret += mcgen(''' + ret = mcgen(''' union { /* union tag is @%(c_name)s */ void *data; ''', - c_name=c_name(variants.tag_member.name)) + c_name=c_name(variants.tag_member.name)) for var in variants.variants: # Ugly special case for simple union TODO get rid of it @@ -176,7 +169,6 @@ struct %(c_name)s { ret += mcgen(''' } u; -}; ''') return ret @@ -268,14 +260,7 @@ class QAPISchemaGenTypeVisitor(QAPISchemaVisitor): def visit_object_type(self, name, info, base, members, variants): self._fwdecl += gen_fwd_object_or_array(name) - if variants: - if members: - # Members other than variants.tag_member not implemented - assert len(members) == 1 - assert members[0] == variants.tag_member - self.decl += gen_union(name, base, variants) - else: - self.decl += gen_struct(name, base, members) + self.decl += gen_object(name, base, members, variants) if base: self.decl += gen_upcast(name, base) self._gen_type_cleanup(name) @@ -283,7 +268,7 @@ class QAPISchemaGenTypeVisitor(QAPISchemaVisitor): def visit_alternate_type(self, name, info, variants): self._fwdecl += gen_fwd_object_or_array(name) self._fwdefn += gen_alternate_qtypes(name, variants) - self.decl += gen_union(name, None, variants) + self.decl += gen_object(name, None, [variants.tag_member], variants) self.decl += gen_alternate_qtypes_decl(name) self._gen_type_cleanup(name) |