from qapi import *
import re
-# visit_type_FOO_implicit() is emitted as needed; track if it has already
-# been output.
-implicit_structs_seen = set()
-
-# visit_type_FOO_fields() is always emitted; track if a forward declaration
-# or implementation has already been output.
-struct_fields_seen = set()
-
def gen_visit_decl(name, scalar=False):
c_type = c_name(name) + ' *'
c_name=c_name(name), c_type=c_type)
-def gen_visit_fields_decl(typ):
- ret = ''
- if typ.name not in struct_fields_seen:
- ret += mcgen('''
-
-static void visit_type_%(c_type)s_fields(Visitor *v, %(c_type)s *obj, Error **errp);
-''',
- c_type=typ.c_name())
- struct_fields_seen.add(typ.name)
- return ret
-
-
-def gen_visit_implicit_struct(typ):
- if typ in implicit_structs_seen:
- return ''
- implicit_structs_seen.add(typ)
-
- ret = gen_visit_fields_decl(typ)
-
- ret += mcgen('''
-
-static void visit_type_implicit_%(c_type)s(Visitor *v, %(c_type)s **obj, Error **errp)
-{
- Error *err = NULL;
+def gen_visit_members_decl(name):
+ return mcgen('''
- visit_start_implicit_struct(v, (void **)obj, sizeof(%(c_type)s), &err);
- if (!err) {
- visit_type_%(c_type)s_fields(v, *obj, errp);
- visit_end_implicit_struct(v);
- }
- error_propagate(errp, err);
-}
+void visit_type_%(c_name)s_members(Visitor *v, %(c_name)s *obj, Error **errp);
''',
- c_type=typ.c_name())
- return ret
-
-
-def gen_visit_struct_fields(name, base, members, variants):
- ret = ''
+ c_name=c_name(name))
- if base:
- ret += gen_visit_fields_decl(base)
- 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)
- struct_fields_seen.add(name)
- ret += mcgen('''
+def gen_visit_object_members(name, base, members, variants):
+ ret = mcgen('''
-static void visit_type_%(c_name)s_fields(Visitor *v, %(c_name)s *obj, Error **errp)
+void visit_type_%(c_name)s_members(Visitor *v, %(c_name)s *obj, Error **errp)
{
Error *err = NULL;
''',
- c_name=c_name(name))
+ c_name=c_name(name))
if base:
ret += mcgen('''
- visit_type_%(c_type)s_fields(v, (%(c_type)s *)obj, &err);
+ visit_type_%(c_type)s_members(v, (%(c_type)s *)obj, &err);
''',
c_type=base.c_name())
ret += gen_err_check()
- ret += gen_visit_fields(members, prefix='obj->')
+ for memb in members:
+ if memb.optional:
+ ret += mcgen('''
+ if (visit_optional(v, "%(name)s", &obj->has_%(c_name)s)) {
+''',
+ name=memb.name, c_name=c_name(memb.name))
+ push_indent()
+ ret += mcgen('''
+ visit_type_%(c_type)s(v, "%(name)s", &obj->%(c_name)s, &err);
+''',
+ c_type=memb.type.c_name(), name=memb.name,
+ c_name=c_name(memb.name))
+ ret += gen_err_check()
+ if memb.optional:
+ pop_indent()
+ ret += mcgen('''
+ }
+''')
if variants:
ret += mcgen('''
- if (!visit_start_union(v, !!obj->u.data, &err) || err) {
- goto out;
- }
switch (obj->%(c_name)s) {
''',
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('''
case %(case)s:
+ visit_type_%(c_type)s_members(v, &obj->u.%(c_name)s, &err);
+ break;
''',
case=c_enum_const(variants.tag_member.type.name,
var.name,
- variants.tag_member.type.prefix))
- 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('''
- 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('''
- break;
-''')
+ variants.tag_member.type.prefix),
+ c_type=var.type.c_name(), c_name=c_name(var.name))
ret += mcgen('''
default:
}
''')
- # 'goto out' produced for base, by gen_visit_fields() for each member,
- # and if variants were present
+ # 'goto out' produced for base, for each member, and if variants were
+ # present
if base or members or variants:
ret += mcgen('''
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
- # rather than leaving it non-NULL. As currently written, the caller must
- # call qapi_free_FOOList() to avoid a memory leak of the partial FOOList.
return mcgen('''
void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error **errp)
{
Error *err = NULL;
- GenericList *i, **prev;
+ %(c_name)s *tail;
+ size_t size = sizeof(**obj);
- visit_start_list(v, name, &err);
+ visit_start_list(v, name, (GenericList **)obj, size, &err);
if (err) {
goto out;
}
- for (prev = (GenericList **)obj;
- !err && (i = visit_next_list(v, prev, sizeof(**obj))) != NULL;
- prev = &i) {
- %(c_name)s *native_i = (%(c_name)s *)i;
- visit_type_%(c_elt_type)s(v, NULL, &native_i->value, &err);
+ for (tail = *obj; tail;
+ tail = (%(c_name)s *)visit_next_list(v, (GenericList *)tail, size)) {
+ visit_type_%(c_elt_type)s(v, NULL, &tail->value, &err);
+ if (err) {
+ break;
+ }
}
visit_end_list(v);
+ if (err && visit_is_input(v)) {
+ qapi_free_%(c_name)s(*obj);
+ *obj = NULL;
+ }
out:
error_propagate(errp, err);
}
def gen_visit_alternate(name, variants):
promote_int = 'true'
+ ret = ''
for var in variants.variants:
if var.type.alternate_qtype() == 'QTYPE_QINT':
promote_int = 'false'
- ret = mcgen('''
+ ret += mcgen('''
void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error **errp)
{
Error *err = NULL;
- visit_start_implicit_struct(v, (void**) obj, sizeof(%(c_name)s), &err);
+ visit_start_alternate(v, name, (GenericAlternate **)obj, sizeof(**obj),
+ %(promote_int)s, &err);
if (err) {
goto out;
}
- visit_get_next_type(v, name, &(*obj)->type, %(promote_int)s, &err);
- if (err) {
- goto out_obj;
- }
switch ((*obj)->type) {
''',
- c_name=c_name(name), promote_int=promote_int)
+ c_name=c_name(name), promote_int=promote_int)
for var in variants.variants:
ret += mcgen('''
case %(case)s:
+''',
+ case=var.type.alternate_qtype())
+ if isinstance(var.type, QAPISchemaObjectType):
+ ret += mcgen('''
+ visit_start_struct(v, name, NULL, 0, &err);
+ if (err) {
+ break;
+ }
+ visit_type_%(c_type)s_members(v, &(*obj)->u.%(c_name)s, &err);
+ if (!err) {
+ visit_check_struct(v, &err);
+ }
+ visit_end_struct(v);
+''',
+ c_type=var.type.c_name(),
+ c_name=c_name(var.name))
+ else:
+ ret += mcgen('''
visit_type_%(c_type)s(v, name, &(*obj)->u.%(c_name)s, &err);
- break;
''',
- case=var.type.alternate_qtype(),
- c_type=var.type.c_name(),
- c_name=c_name(var.name))
+ c_type=var.type.c_name(),
+ c_name=c_name(var.name))
+ ret += mcgen('''
+ break;
+''')
ret += mcgen('''
default:
error_setg(&err, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
"%(name)s");
}
-out_obj:
- visit_end_implicit_struct(v);
+ visit_end_alternate(v);
+ if (err && visit_is_input(v)) {
+ qapi_free_%(c_name)s(*obj);
+ *obj = NULL;
+ }
out:
error_propagate(errp, err);
}
''',
- name=name)
+ name=name, c_name=c_name(name))
return ret
def gen_visit_object(name, base, members, variants):
- ret = gen_visit_struct_fields(name, base, members, variants)
-
- # 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('''
+ return mcgen('''
void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error **errp)
{
if (!*obj) {
goto out_obj;
}
- visit_type_%(c_name)s_fields(v, *obj, &err);
- error_propagate(errp, err);
- err = NULL;
+ visit_type_%(c_name)s_members(v, *obj, &err);
+ if (err) {
+ goto out_obj;
+ }
+ visit_check_struct(v, &err);
out_obj:
- visit_end_struct(v, &err);
+ visit_end_struct(v);
+ if (err && visit_is_input(v)) {
+ qapi_free_%(c_name)s(*obj);
+ *obj = NULL;
+ }
out:
error_propagate(errp, err);
}
''',
c_name=c_name(name))
- return ret
-
class QAPISchemaGenVisitVisitor(QAPISchemaVisitor):
def __init__(self):
self.decl = self._btin + self.decl
self._btin = None
- def visit_needed(self, entity):
- # Visit everything except implicit objects
- return not (entity.is_implicit() and
- isinstance(entity, QAPISchemaObjectType))
-
def visit_enum_type(self, name, info, values, prefix):
# Special case for our lone builtin enum type
# TODO use something cleaner than existence of info
self.defn += defn
def visit_object_type(self, name, info, base, members, variants):
- self.decl += gen_visit_decl(name)
- self.defn += gen_visit_object(name, base, members, variants)
+ # Nothing to do for the special empty builtin
+ if name == 'q_empty':
+ return
+ self.decl += gen_visit_members_decl(name)
+ self.defn += gen_visit_object_members(name, base, members, variants)
+ # TODO Worth changing the visitor signature, so we could
+ # directly use rather than repeat type.is_implicit()?
+ if not name.startswith('q_'):
+ # only explicit types need an allocating visit
+ self.decl += gen_visit_decl(name)
+ self.defn += gen_visit_object(name, base, members, variants)
def visit_alternate_type(self, name, info, variants):
self.decl += gen_visit_decl(name)
fdef.write(mcgen('''
#include "qemu/osdep.h"
#include "qemu-common.h"
+#include "qapi/error.h"
#include "%(prefix)sqapi-visit.h"
''',
prefix=prefix))
projects / qemu.git / blobdiff