]> git.proxmox.com Git - qemu.git/blame - qapi/qmp-output-visitor.c
Update version to 1.0-rc2
[qemu.git] / qapi / qmp-output-visitor.c
CommitLineData
e4e6aa14
MR
1/*
2 * Core Definitions for QAPI/QMP Command Registry
3 *
4 * Copyright IBM, Corp. 2011
5 *
6 * Authors:
7 * Anthony Liguori <aliguori@us.ibm.com>
8 *
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.
11 *
12 */
13
14#include "qmp-output-visitor.h"
15#include "qemu-queue.h"
16#include "qemu-common.h"
17#include "qemu-objects.h"
18#include "qerror.h"
19
20typedef struct QStackEntry
21{
22 QObject *value;
e1bc2f7b 23 bool is_list_head;
e4e6aa14
MR
24 QTAILQ_ENTRY(QStackEntry) node;
25} QStackEntry;
26
27typedef QTAILQ_HEAD(QStack, QStackEntry) QStack;
28
29struct QmpOutputVisitor
30{
31 Visitor visitor;
32 QStack stack;
33};
34
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))
38
39static QmpOutputVisitor *to_qov(Visitor *v)
40{
41 return container_of(v, QmpOutputVisitor, visitor);
42}
43
44static void qmp_output_push_obj(QmpOutputVisitor *qov, QObject *value)
45{
7267c094 46 QStackEntry *e = g_malloc0(sizeof(*e));
e4e6aa14
MR
47
48 e->value = value;
e1bc2f7b
MR
49 if (qobject_type(e->value) == QTYPE_QLIST) {
50 e->is_list_head = true;
51 }
e4e6aa14
MR
52 QTAILQ_INSERT_HEAD(&qov->stack, e, node);
53}
54
55static QObject *qmp_output_pop(QmpOutputVisitor *qov)
56{
57 QStackEntry *e = QTAILQ_FIRST(&qov->stack);
58 QObject *value;
59 QTAILQ_REMOVE(&qov->stack, e, node);
60 value = e->value;
7267c094 61 g_free(e);
e4e6aa14
MR
62 return value;
63}
64
65static QObject *qmp_output_first(QmpOutputVisitor *qov)
66{
67 QStackEntry *e = QTAILQ_LAST(&qov->stack, QStack);
68 return e->value;
69}
70
71static QObject *qmp_output_last(QmpOutputVisitor *qov)
72{
73 QStackEntry *e = QTAILQ_FIRST(&qov->stack);
74 return e->value;
75}
76
77static void qmp_output_add_obj(QmpOutputVisitor *qov, const char *name,
78 QObject *value)
79{
80 QObject *cur;
81
82 if (QTAILQ_EMPTY(&qov->stack)) {
83 qmp_output_push_obj(qov, value);
84 return;
85 }
86
87 cur = qmp_output_last(qov);
88
89 switch (qobject_type(cur)) {
90 case QTYPE_QDICT:
91 qdict_put_obj(qobject_to_qdict(cur), name, value);
92 break;
93 case QTYPE_QLIST:
94 qlist_append_obj(qobject_to_qlist(cur), value);
95 break;
96 default:
97 qobject_decref(qmp_output_pop(qov));
98 qmp_output_push_obj(qov, value);
99 break;
100 }
101}
102
103static void qmp_output_start_struct(Visitor *v, void **obj, const char *kind,
104 const char *name, size_t unused,
105 Error **errp)
106{
107 QmpOutputVisitor *qov = to_qov(v);
108 QDict *dict = qdict_new();
109
110 qmp_output_add(qov, name, dict);
111 qmp_output_push(qov, dict);
112}
113
114static void qmp_output_end_struct(Visitor *v, Error **errp)
115{
116 QmpOutputVisitor *qov = to_qov(v);
117 qmp_output_pop(qov);
118}
119
120static void qmp_output_start_list(Visitor *v, const char *name, Error **errp)
121{
122 QmpOutputVisitor *qov = to_qov(v);
123 QList *list = qlist_new();
124
125 qmp_output_add(qov, name, list);
126 qmp_output_push(qov, list);
127}
128
e1bc2f7b 129static GenericList *qmp_output_next_list(Visitor *v, GenericList **listp,
e4e6aa14
MR
130 Error **errp)
131{
e1bc2f7b
MR
132 GenericList *list = *listp;
133 QmpOutputVisitor *qov = to_qov(v);
134 QStackEntry *e = QTAILQ_FIRST(&qov->stack);
135
136 assert(e);
137 if (e->is_list_head) {
138 e->is_list_head = false;
139 return list;
140 }
141
142 return list ? list->next : NULL;
e4e6aa14
MR
143}
144
145static void qmp_output_end_list(Visitor *v, Error **errp)
146{
147 QmpOutputVisitor *qov = to_qov(v);
148 qmp_output_pop(qov);
149}
150
151static void qmp_output_type_int(Visitor *v, int64_t *obj, const char *name,
152 Error **errp)
153{
154 QmpOutputVisitor *qov = to_qov(v);
155 qmp_output_add(qov, name, qint_from_int(*obj));
156}
157
158static void qmp_output_type_bool(Visitor *v, bool *obj, const char *name,
159 Error **errp)
160{
161 QmpOutputVisitor *qov = to_qov(v);
162 qmp_output_add(qov, name, qbool_from_int(*obj));
163}
164
165static void qmp_output_type_str(Visitor *v, char **obj, const char *name,
166 Error **errp)
167{
168 QmpOutputVisitor *qov = to_qov(v);
169 if (*obj) {
170 qmp_output_add(qov, name, qstring_from_str(*obj));
171 } else {
172 qmp_output_add(qov, name, qstring_from_str(""));
173 }
174}
175
176static void qmp_output_type_number(Visitor *v, double *obj, const char *name,
177 Error **errp)
178{
179 QmpOutputVisitor *qov = to_qov(v);
180 qmp_output_add(qov, name, qfloat_from_double(*obj));
181}
182
183static void qmp_output_type_enum(Visitor *v, int *obj, const char *strings[],
184 const char *kind, const char *name,
185 Error **errp)
186{
187 int i = 0;
188 int value = *obj;
189 char *enum_str;
190
191 assert(strings);
192 while (strings[i++] != NULL);
193 if (value >= i - 1) {
194 error_set(errp, QERR_INVALID_PARAMETER, name ? name : "null");
195 return;
196 }
197
198 enum_str = (char *)strings[value];
199 qmp_output_type_str(v, &enum_str, name, errp);
200}
201
202QObject *qmp_output_get_qobject(QmpOutputVisitor *qov)
203{
204 QObject *obj = qmp_output_first(qov);
205 if (obj) {
206 qobject_incref(obj);
207 }
208 return obj;
209}
210
211Visitor *qmp_output_get_visitor(QmpOutputVisitor *v)
212{
213 return &v->visitor;
214}
215
216void qmp_output_visitor_cleanup(QmpOutputVisitor *v)
217{
218 QStackEntry *e, *tmp;
219
220 QTAILQ_FOREACH_SAFE(e, &v->stack, node, tmp) {
221 QTAILQ_REMOVE(&v->stack, e, node);
222 if (e->value) {
223 qobject_decref(e->value);
224 }
7267c094 225 g_free(e);
e4e6aa14
MR
226 }
227
7267c094 228 g_free(v);
e4e6aa14
MR
229}
230
231QmpOutputVisitor *qmp_output_visitor_new(void)
232{
233 QmpOutputVisitor *v;
234
7267c094 235 v = g_malloc0(sizeof(*v));
e4e6aa14
MR
236
237 v->visitor.start_struct = qmp_output_start_struct;
238 v->visitor.end_struct = qmp_output_end_struct;
239 v->visitor.start_list = qmp_output_start_list;
240 v->visitor.next_list = qmp_output_next_list;
241 v->visitor.end_list = qmp_output_end_list;
242 v->visitor.type_enum = qmp_output_type_enum;
243 v->visitor.type_int = qmp_output_type_int;
244 v->visitor.type_bool = qmp_output_type_bool;
245 v->visitor.type_str = qmp_output_type_str;
246 v->visitor.type_number = qmp_output_type_number;
247
248 QTAILQ_INIT(&v->stack);
249
250 return v;
251}