/*
* Core Definitions for QAPI/QMP Command Registry
*
+ * Copyright (C) 2012-2016 Red Hat, Inc.
* Copyright IBM, Corp. 2011
*
* Authors:
*
*/
+#include "qemu/osdep.h"
#include "qapi/qmp-output-visitor.h"
#include "qapi/visitor-impl.h"
#include "qemu/queue.h"
#include "qemu-common.h"
#include "qapi/qmp/types.h"
-#include "qapi/qmp/qerror.h"
typedef struct QStackEntry
{
struct QmpOutputVisitor
{
Visitor visitor;
- QStack stack;
+ QStack stack; /* Stack of containers that haven't yet been finished */
+ QObject *root; /* Root of the output visit */
};
#define qmp_output_add(qov, name, value) \
return container_of(v, QmpOutputVisitor, visitor);
}
+/* Push @value onto the stack of current QObjects being built */
static void qmp_output_push_obj(QmpOutputVisitor *qov, QObject *value)
{
QStackEntry *e = g_malloc0(sizeof(*e));
+ assert(qov->root);
+ assert(value);
e->value = value;
if (qobject_type(e->value) == QTYPE_QLIST) {
e->is_list_head = true;
QTAILQ_INSERT_HEAD(&qov->stack, e, node);
}
+/* Pop a value off the stack of QObjects being built, and return it. */
static QObject *qmp_output_pop(QmpOutputVisitor *qov)
{
QStackEntry *e = QTAILQ_FIRST(&qov->stack);
QObject *value;
+
+ assert(e);
QTAILQ_REMOVE(&qov->stack, e, node);
value = e->value;
+ assert(value);
g_free(e);
return value;
}
-static QObject *qmp_output_first(QmpOutputVisitor *qov)
-{
- QStackEntry *e = QTAILQ_LAST(&qov->stack, QStack);
-
- /* FIXME - find a better way to deal with NULL values */
- if (!e) {
- return NULL;
- }
-
- return e->value;
-}
-
-static QObject *qmp_output_last(QmpOutputVisitor *qov)
-{
- QStackEntry *e = QTAILQ_FIRST(&qov->stack);
- return e->value;
-}
-
+/* Add @value to the current QObject being built.
+ * If the stack is visiting a dictionary or list, @value is now owned
+ * by that container. Otherwise, @value is now the root. */
static void qmp_output_add_obj(QmpOutputVisitor *qov, const char *name,
QObject *value)
{
- QObject *cur;
-
- if (QTAILQ_EMPTY(&qov->stack)) {
- qmp_output_push_obj(qov, value);
- return;
- }
+ QStackEntry *e = QTAILQ_FIRST(&qov->stack);
+ QObject *cur = e ? e->value : NULL;
- cur = qmp_output_last(qov);
-
- switch (qobject_type(cur)) {
- case QTYPE_QDICT:
- qdict_put_obj(qobject_to_qdict(cur), name, value);
- break;
- case QTYPE_QLIST:
- qlist_append_obj(qobject_to_qlist(cur), value);
- break;
- default:
- qobject_decref(qmp_output_pop(qov));
- qmp_output_push_obj(qov, value);
- break;
+ if (!cur) {
+ /* FIXME we should require the user to reset the visitor, rather
+ * than throwing away the previous root */
+ qobject_decref(qov->root);
+ qov->root = value;
+ } else {
+ switch (qobject_type(cur)) {
+ case QTYPE_QDICT:
+ assert(name);
+ qdict_put_obj(qobject_to_qdict(cur), name, value);
+ break;
+ case QTYPE_QLIST:
+ qlist_append_obj(qobject_to_qlist(cur), value);
+ break;
+ default:
+ g_assert_not_reached();
+ }
}
}
-static void qmp_output_start_struct(Visitor *v, void **obj, const char *kind,
- const char *name, size_t unused,
- Error **errp)
+static void qmp_output_start_struct(Visitor *v, const char *name, void **obj,
+ size_t unused, Error **errp)
{
QmpOutputVisitor *qov = to_qov(v);
QDict *dict = qdict_new();
}
static GenericList *qmp_output_next_list(Visitor *v, GenericList **listp,
- Error **errp)
+ size_t size)
{
GenericList *list = *listp;
QmpOutputVisitor *qov = to_qov(v);
return list ? list->next : NULL;
}
-static void qmp_output_end_list(Visitor *v, Error **errp)
+static void qmp_output_end_list(Visitor *v)
{
QmpOutputVisitor *qov = to_qov(v);
qmp_output_pop(qov);
}
-static void qmp_output_type_int(Visitor *v, int64_t *obj, const char *name,
- Error **errp)
+static void qmp_output_type_int64(Visitor *v, const char *name, int64_t *obj,
+ Error **errp)
{
QmpOutputVisitor *qov = to_qov(v);
qmp_output_add(qov, name, qint_from_int(*obj));
}
-static void qmp_output_type_bool(Visitor *v, bool *obj, const char *name,
+static void qmp_output_type_uint64(Visitor *v, const char *name, uint64_t *obj,
+ Error **errp)
+{
+ /* FIXME: QMP outputs values larger than INT64_MAX as negative */
+ QmpOutputVisitor *qov = to_qov(v);
+ qmp_output_add(qov, name, qint_from_int(*obj));
+}
+
+static void qmp_output_type_bool(Visitor *v, const char *name, bool *obj,
Error **errp)
{
QmpOutputVisitor *qov = to_qov(v);
- qmp_output_add(qov, name, qbool_from_int(*obj));
+ qmp_output_add(qov, name, qbool_from_bool(*obj));
}
-static void qmp_output_type_str(Visitor *v, char **obj, const char *name,
+static void qmp_output_type_str(Visitor *v, const char *name, char **obj,
Error **errp)
{
QmpOutputVisitor *qov = to_qov(v);
}
}
-static void qmp_output_type_number(Visitor *v, double *obj, const char *name,
+static void qmp_output_type_number(Visitor *v, const char *name, double *obj,
Error **errp)
{
QmpOutputVisitor *qov = to_qov(v);
qmp_output_add(qov, name, qfloat_from_double(*obj));
}
+static void qmp_output_type_any(Visitor *v, const char *name, QObject **obj,
+ Error **errp)
+{
+ QmpOutputVisitor *qov = to_qov(v);
+ qobject_incref(*obj);
+ qmp_output_add_obj(qov, name, *obj);
+}
+
+static void qmp_output_type_null(Visitor *v, const char *name, Error **errp)
+{
+ QmpOutputVisitor *qov = to_qov(v);
+ qmp_output_add_obj(qov, name, qnull());
+}
+
+/* Finish building, and return the root object. Will not be NULL. */
QObject *qmp_output_get_qobject(QmpOutputVisitor *qov)
{
- QObject *obj = qmp_output_first(qov);
+ /* FIXME: we should require that a visit occurred, and that it is
+ * complete (no starts without a matching end) */
+ QObject *obj = qov->root;
if (obj) {
qobject_incref(obj);
+ } else {
+ obj = qnull();
}
return obj;
}
{
QStackEntry *e, *tmp;
- /* The bottom QStackEntry, if any, owns the root QObject. See the
- * qmp_output_push_obj() invocations in qmp_output_add_obj(). */
- QObject *root = QTAILQ_EMPTY(&v->stack) ? NULL : qmp_output_first(v);
-
QTAILQ_FOREACH_SAFE(e, &v->stack, node, tmp) {
QTAILQ_REMOVE(&v->stack, e, node);
g_free(e);
}
- qobject_decref(root);
+ qobject_decref(v->root);
g_free(v);
}
v = g_malloc0(sizeof(*v));
+ v->visitor.type = VISITOR_OUTPUT;
v->visitor.start_struct = qmp_output_start_struct;
v->visitor.end_struct = qmp_output_end_struct;
v->visitor.start_list = qmp_output_start_list;
v->visitor.next_list = qmp_output_next_list;
v->visitor.end_list = qmp_output_end_list;
- v->visitor.type_enum = output_type_enum;
- v->visitor.type_int = qmp_output_type_int;
+ v->visitor.type_int64 = qmp_output_type_int64;
+ v->visitor.type_uint64 = qmp_output_type_uint64;
v->visitor.type_bool = qmp_output_type_bool;
v->visitor.type_str = qmp_output_type_str;
v->visitor.type_number = qmp_output_type_number;
+ v->visitor.type_any = qmp_output_type_any;
+ v->visitor.type_null = qmp_output_type_null;
QTAILQ_INIT(&v->stack);
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