root / qapi / qmp-output-visitor.c @ e4e6aa14
History | View | Annotate | Download (5.8 kB)
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 |
|
20 |
typedef struct QStackEntry |
21 |
{ |
22 |
QObject *value; |
23 |
QTAILQ_ENTRY(QStackEntry) node; |
24 |
} QStackEntry; |
25 |
|
26 |
typedef QTAILQ_HEAD(QStack, QStackEntry) QStack;
|
27 |
|
28 |
struct QmpOutputVisitor
|
29 |
{ |
30 |
Visitor visitor; |
31 |
QStack stack; |
32 |
}; |
33 |
|
34 |
#define qmp_output_add(qov, name, value) \
|
35 |
qmp_output_add_obj(qov, name, QOBJECT(value)) |
36 |
#define qmp_output_push(qov, value) qmp_output_push_obj(qov, QOBJECT(value))
|
37 |
|
38 |
static QmpOutputVisitor *to_qov(Visitor *v)
|
39 |
{ |
40 |
return container_of(v, QmpOutputVisitor, visitor);
|
41 |
} |
42 |
|
43 |
static void qmp_output_push_obj(QmpOutputVisitor *qov, QObject *value) |
44 |
{ |
45 |
QStackEntry *e = qemu_mallocz(sizeof(*e));
|
46 |
|
47 |
e->value = value; |
48 |
QTAILQ_INSERT_HEAD(&qov->stack, e, node); |
49 |
} |
50 |
|
51 |
static QObject *qmp_output_pop(QmpOutputVisitor *qov)
|
52 |
{ |
53 |
QStackEntry *e = QTAILQ_FIRST(&qov->stack); |
54 |
QObject *value; |
55 |
QTAILQ_REMOVE(&qov->stack, e, node); |
56 |
value = e->value; |
57 |
qemu_free(e); |
58 |
return value;
|
59 |
} |
60 |
|
61 |
static QObject *qmp_output_first(QmpOutputVisitor *qov)
|
62 |
{ |
63 |
QStackEntry *e = QTAILQ_LAST(&qov->stack, QStack); |
64 |
return e->value;
|
65 |
} |
66 |
|
67 |
static QObject *qmp_output_last(QmpOutputVisitor *qov)
|
68 |
{ |
69 |
QStackEntry *e = QTAILQ_FIRST(&qov->stack); |
70 |
return e->value;
|
71 |
} |
72 |
|
73 |
static void qmp_output_add_obj(QmpOutputVisitor *qov, const char *name, |
74 |
QObject *value) |
75 |
{ |
76 |
QObject *cur; |
77 |
|
78 |
if (QTAILQ_EMPTY(&qov->stack)) {
|
79 |
qmp_output_push_obj(qov, value); |
80 |
return;
|
81 |
} |
82 |
|
83 |
cur = qmp_output_last(qov); |
84 |
|
85 |
switch (qobject_type(cur)) {
|
86 |
case QTYPE_QDICT:
|
87 |
qdict_put_obj(qobject_to_qdict(cur), name, value); |
88 |
break;
|
89 |
case QTYPE_QLIST:
|
90 |
qlist_append_obj(qobject_to_qlist(cur), value); |
91 |
break;
|
92 |
default:
|
93 |
qobject_decref(qmp_output_pop(qov)); |
94 |
qmp_output_push_obj(qov, value); |
95 |
break;
|
96 |
} |
97 |
} |
98 |
|
99 |
static void qmp_output_start_struct(Visitor *v, void **obj, const char *kind, |
100 |
const char *name, size_t unused, |
101 |
Error **errp) |
102 |
{ |
103 |
QmpOutputVisitor *qov = to_qov(v); |
104 |
QDict *dict = qdict_new(); |
105 |
|
106 |
qmp_output_add(qov, name, dict); |
107 |
qmp_output_push(qov, dict); |
108 |
} |
109 |
|
110 |
static void qmp_output_end_struct(Visitor *v, Error **errp) |
111 |
{ |
112 |
QmpOutputVisitor *qov = to_qov(v); |
113 |
qmp_output_pop(qov); |
114 |
} |
115 |
|
116 |
static void qmp_output_start_list(Visitor *v, const char *name, Error **errp) |
117 |
{ |
118 |
QmpOutputVisitor *qov = to_qov(v); |
119 |
QList *list = qlist_new(); |
120 |
|
121 |
qmp_output_add(qov, name, list); |
122 |
qmp_output_push(qov, list); |
123 |
} |
124 |
|
125 |
static GenericList *qmp_output_next_list(Visitor *v, GenericList **list,
|
126 |
Error **errp) |
127 |
{ |
128 |
GenericList *retval = *list; |
129 |
*list = retval->next; |
130 |
return retval;
|
131 |
} |
132 |
|
133 |
static void qmp_output_end_list(Visitor *v, Error **errp) |
134 |
{ |
135 |
QmpOutputVisitor *qov = to_qov(v); |
136 |
qmp_output_pop(qov); |
137 |
} |
138 |
|
139 |
static void qmp_output_type_int(Visitor *v, int64_t *obj, const char *name, |
140 |
Error **errp) |
141 |
{ |
142 |
QmpOutputVisitor *qov = to_qov(v); |
143 |
qmp_output_add(qov, name, qint_from_int(*obj)); |
144 |
} |
145 |
|
146 |
static void qmp_output_type_bool(Visitor *v, bool *obj, const char *name, |
147 |
Error **errp) |
148 |
{ |
149 |
QmpOutputVisitor *qov = to_qov(v); |
150 |
qmp_output_add(qov, name, qbool_from_int(*obj)); |
151 |
} |
152 |
|
153 |
static void qmp_output_type_str(Visitor *v, char **obj, const char *name, |
154 |
Error **errp) |
155 |
{ |
156 |
QmpOutputVisitor *qov = to_qov(v); |
157 |
if (*obj) {
|
158 |
qmp_output_add(qov, name, qstring_from_str(*obj)); |
159 |
} else {
|
160 |
qmp_output_add(qov, name, qstring_from_str(""));
|
161 |
} |
162 |
} |
163 |
|
164 |
static void qmp_output_type_number(Visitor *v, double *obj, const char *name, |
165 |
Error **errp) |
166 |
{ |
167 |
QmpOutputVisitor *qov = to_qov(v); |
168 |
qmp_output_add(qov, name, qfloat_from_double(*obj)); |
169 |
} |
170 |
|
171 |
static void qmp_output_type_enum(Visitor *v, int *obj, const char *strings[], |
172 |
const char *kind, const char *name, |
173 |
Error **errp) |
174 |
{ |
175 |
int i = 0; |
176 |
int value = *obj;
|
177 |
char *enum_str;
|
178 |
|
179 |
assert(strings); |
180 |
while (strings[i++] != NULL); |
181 |
if (value >= i - 1) { |
182 |
error_set(errp, QERR_INVALID_PARAMETER, name ? name : "null");
|
183 |
return;
|
184 |
} |
185 |
|
186 |
enum_str = (char *)strings[value];
|
187 |
qmp_output_type_str(v, &enum_str, name, errp); |
188 |
} |
189 |
|
190 |
QObject *qmp_output_get_qobject(QmpOutputVisitor *qov) |
191 |
{ |
192 |
QObject *obj = qmp_output_first(qov); |
193 |
if (obj) {
|
194 |
qobject_incref(obj); |
195 |
} |
196 |
return obj;
|
197 |
} |
198 |
|
199 |
Visitor *qmp_output_get_visitor(QmpOutputVisitor *v) |
200 |
{ |
201 |
return &v->visitor;
|
202 |
} |
203 |
|
204 |
void qmp_output_visitor_cleanup(QmpOutputVisitor *v)
|
205 |
{ |
206 |
QStackEntry *e, *tmp; |
207 |
|
208 |
QTAILQ_FOREACH_SAFE(e, &v->stack, node, tmp) { |
209 |
QTAILQ_REMOVE(&v->stack, e, node); |
210 |
if (e->value) {
|
211 |
qobject_decref(e->value); |
212 |
} |
213 |
qemu_free(e); |
214 |
} |
215 |
|
216 |
qemu_free(v); |
217 |
} |
218 |
|
219 |
QmpOutputVisitor *qmp_output_visitor_new(void)
|
220 |
{ |
221 |
QmpOutputVisitor *v; |
222 |
|
223 |
v = qemu_mallocz(sizeof(*v));
|
224 |
|
225 |
v->visitor.start_struct = qmp_output_start_struct; |
226 |
v->visitor.end_struct = qmp_output_end_struct; |
227 |
v->visitor.start_list = qmp_output_start_list; |
228 |
v->visitor.next_list = qmp_output_next_list; |
229 |
v->visitor.end_list = qmp_output_end_list; |
230 |
v->visitor.type_enum = qmp_output_type_enum; |
231 |
v->visitor.type_int = qmp_output_type_int; |
232 |
v->visitor.type_bool = qmp_output_type_bool; |
233 |
v->visitor.type_str = qmp_output_type_str; |
234 |
v->visitor.type_number = qmp_output_type_number; |
235 |
|
236 |
QTAILQ_INIT(&v->stack); |
237 |
|
238 |
return v;
|
239 |
} |