2 * Core Definitions for QAPI/QMP Command Registry
4 * Copyright IBM, Corp. 2011
7 * Anthony Liguori <aliguori@us.ibm.com>
9 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
10 * See the COPYING.LIB file in the top-level directory.
14 #include "qapi/qmp-output-visitor.h"
15 #include "qapi/visitor-impl.h"
16 #include "qemu/queue.h"
17 #include "qemu-common.h"
18 #include "qapi/qmp/types.h"
20 typedef struct QStackEntry
24 QTAILQ_ENTRY(QStackEntry) node;
27 typedef QTAILQ_HEAD(QStack, QStackEntry) QStack;
29 struct QmpOutputVisitor
35 #define qmp_output_add(qov, name, value) \
36 qmp_output_add_obj(qov, name, QOBJECT(value))
37 #define qmp_output_push(qov, value) qmp_output_push_obj(qov, QOBJECT(value))
39 static QmpOutputVisitor *to_qov(Visitor *v)
41 return container_of(v, QmpOutputVisitor, visitor);
44 static void qmp_output_push_obj(QmpOutputVisitor *qov, QObject *value)
46 QStackEntry *e = g_malloc0(sizeof(*e));
49 if (qobject_type(e->value) == QTYPE_QLIST) {
50 e->is_list_head = true;
52 QTAILQ_INSERT_HEAD(&qov->stack, e, node);
55 static QObject *qmp_output_pop(QmpOutputVisitor *qov)
57 QStackEntry *e = QTAILQ_FIRST(&qov->stack);
59 QTAILQ_REMOVE(&qov->stack, e, node);
65 static QObject *qmp_output_first(QmpOutputVisitor *qov)
67 QStackEntry *e = QTAILQ_LAST(&qov->stack, QStack);
69 /* FIXME - find a better way to deal with NULL values */
77 static QObject *qmp_output_last(QmpOutputVisitor *qov)
79 QStackEntry *e = QTAILQ_FIRST(&qov->stack);
83 static void qmp_output_add_obj(QmpOutputVisitor *qov, const char *name,
88 if (QTAILQ_EMPTY(&qov->stack)) {
89 qmp_output_push_obj(qov, value);
93 cur = qmp_output_last(qov);
95 switch (qobject_type(cur)) {
97 qdict_put_obj(qobject_to_qdict(cur), name, value);
100 qlist_append_obj(qobject_to_qlist(cur), value);
103 qobject_decref(qmp_output_pop(qov));
104 qmp_output_push_obj(qov, value);
109 static void qmp_output_start_struct(Visitor *v, void **obj, const char *kind,
110 const char *name, size_t unused,
113 QmpOutputVisitor *qov = to_qov(v);
114 QDict *dict = qdict_new();
116 qmp_output_add(qov, name, dict);
117 qmp_output_push(qov, dict);
120 static void qmp_output_end_struct(Visitor *v, Error **errp)
122 QmpOutputVisitor *qov = to_qov(v);
126 static void qmp_output_start_list(Visitor *v, const char *name, Error **errp)
128 QmpOutputVisitor *qov = to_qov(v);
129 QList *list = qlist_new();
131 qmp_output_add(qov, name, list);
132 qmp_output_push(qov, list);
135 static GenericList *qmp_output_next_list(Visitor *v, GenericList **listp,
138 GenericList *list = *listp;
139 QmpOutputVisitor *qov = to_qov(v);
140 QStackEntry *e = QTAILQ_FIRST(&qov->stack);
143 if (e->is_list_head) {
144 e->is_list_head = false;
148 return list ? list->next : NULL;
151 static void qmp_output_end_list(Visitor *v, Error **errp)
153 QmpOutputVisitor *qov = to_qov(v);
157 static void qmp_output_type_int(Visitor *v, int64_t *obj, const char *name,
160 QmpOutputVisitor *qov = to_qov(v);
161 qmp_output_add(qov, name, qint_from_int(*obj));
164 static void qmp_output_type_bool(Visitor *v, bool *obj, const char *name,
167 QmpOutputVisitor *qov = to_qov(v);
168 qmp_output_add(qov, name, qbool_from_bool(*obj));
171 static void qmp_output_type_str(Visitor *v, char **obj, const char *name,
174 QmpOutputVisitor *qov = to_qov(v);
176 qmp_output_add(qov, name, qstring_from_str(*obj));
178 qmp_output_add(qov, name, qstring_from_str(""));
182 static void qmp_output_type_number(Visitor *v, double *obj, const char *name,
185 QmpOutputVisitor *qov = to_qov(v);
186 qmp_output_add(qov, name, qfloat_from_double(*obj));
189 QObject *qmp_output_get_qobject(QmpOutputVisitor *qov)
191 QObject *obj = qmp_output_first(qov);
198 Visitor *qmp_output_get_visitor(QmpOutputVisitor *v)
203 void qmp_output_visitor_cleanup(QmpOutputVisitor *v)
205 QStackEntry *e, *tmp;
207 /* The bottom QStackEntry, if any, owns the root QObject. See the
208 * qmp_output_push_obj() invocations in qmp_output_add_obj(). */
209 QObject *root = QTAILQ_EMPTY(&v->stack) ? NULL : qmp_output_first(v);
211 QTAILQ_FOREACH_SAFE(e, &v->stack, node, tmp) {
212 QTAILQ_REMOVE(&v->stack, e, node);
216 qobject_decref(root);
220 QmpOutputVisitor *qmp_output_visitor_new(void)
224 v = g_malloc0(sizeof(*v));
226 v->visitor.start_struct = qmp_output_start_struct;
227 v->visitor.end_struct = qmp_output_end_struct;
228 v->visitor.start_list = qmp_output_start_list;
229 v->visitor.next_list = qmp_output_next_list;
230 v->visitor.end_list = qmp_output_end_list;
231 v->visitor.type_enum = output_type_enum;
232 v->visitor.type_int = qmp_output_type_int;
233 v->visitor.type_bool = qmp_output_type_bool;
234 v->visitor.type_str = qmp_output_type_str;
235 v->visitor.type_number = qmp_output_type_number;
237 QTAILQ_INIT(&v->stack);