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c40cc0a0 MR |
1 | /* |
2 | * Input Visitor | |
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-input-visitor.h" | |
0f71a1e0 | 15 | #include "qapi/qapi-visit-impl.h" |
c40cc0a0 MR |
16 | #include "qemu-queue.h" |
17 | #include "qemu-common.h" | |
18 | #include "qemu-objects.h" | |
19 | #include "qerror.h" | |
20 | ||
21 | #define QIV_STACK_SIZE 1024 | |
22 | ||
23 | typedef struct StackObject | |
24 | { | |
4faaec6a PB |
25 | QObject *obj; |
26 | const QListEntry *entry; | |
e38ac962 | 27 | GHashTable *h; |
c40cc0a0 MR |
28 | } StackObject; |
29 | ||
30 | struct QmpInputVisitor | |
31 | { | |
32 | Visitor visitor; | |
c40cc0a0 MR |
33 | StackObject stack[QIV_STACK_SIZE]; |
34 | int nb_stack; | |
e38ac962 | 35 | bool strict; |
c40cc0a0 MR |
36 | }; |
37 | ||
38 | static QmpInputVisitor *to_qiv(Visitor *v) | |
39 | { | |
40 | return container_of(v, QmpInputVisitor, visitor); | |
41 | } | |
42 | ||
4faaec6a PB |
43 | static QObject *qmp_input_get_object(QmpInputVisitor *qiv, |
44 | const char *name) | |
c40cc0a0 | 45 | { |
4faaec6a | 46 | QObject *qobj = qiv->stack[qiv->nb_stack - 1].obj; |
c40cc0a0 | 47 | |
47c6d3ec PB |
48 | if (qobj) { |
49 | if (name && qobject_type(qobj) == QTYPE_QDICT) { | |
e38ac962 PB |
50 | if (qiv->stack[qiv->nb_stack - 1].h) { |
51 | g_hash_table_remove(qiv->stack[qiv->nb_stack - 1].h, name); | |
52 | } | |
47c6d3ec | 53 | return qdict_get(qobject_to_qdict(qobj), name); |
4faaec6a | 54 | } else if (qiv->stack[qiv->nb_stack - 1].entry) { |
47c6d3ec PB |
55 | return qlist_entry_obj(qiv->stack[qiv->nb_stack - 1].entry); |
56 | } | |
c40cc0a0 MR |
57 | } |
58 | ||
59 | return qobj; | |
60 | } | |
61 | ||
e38ac962 PB |
62 | static void qdict_add_key(const char *key, QObject *obj, void *opaque) |
63 | { | |
64 | GHashTable *h = opaque; | |
65 | g_hash_table_insert(h, (gpointer) key, NULL); | |
66 | } | |
67 | ||
4faaec6a | 68 | static void qmp_input_push(QmpInputVisitor *qiv, QObject *obj, Error **errp) |
c40cc0a0 | 69 | { |
e38ac962 | 70 | GHashTable *h; |
c40cc0a0 MR |
71 | |
72 | if (qiv->nb_stack >= QIV_STACK_SIZE) { | |
73 | error_set(errp, QERR_BUFFER_OVERRUN); | |
74 | return; | |
75 | } | |
e38ac962 PB |
76 | |
77 | qiv->stack[qiv->nb_stack].obj = obj; | |
78 | qiv->stack[qiv->nb_stack].entry = NULL; | |
79 | qiv->stack[qiv->nb_stack].h = NULL; | |
80 | ||
81 | if (qiv->strict && qobject_type(obj) == QTYPE_QDICT) { | |
82 | h = g_hash_table_new(g_str_hash, g_str_equal); | |
83 | qdict_iter(qobject_to_qdict(obj), qdict_add_key, h); | |
84 | qiv->stack[qiv->nb_stack].h = h; | |
85 | } | |
86 | ||
87 | qiv->nb_stack++; | |
c40cc0a0 MR |
88 | } |
89 | ||
90 | static void qmp_input_pop(QmpInputVisitor *qiv, Error **errp) | |
91 | { | |
e38ac962 PB |
92 | GHashTableIter iter; |
93 | gpointer key; | |
94 | ||
95 | if (qiv->strict && qiv->stack[qiv->nb_stack - 1].h) { | |
96 | g_hash_table_iter_init(&iter, qiv->stack[qiv->nb_stack - 1].h); | |
97 | if (g_hash_table_iter_next(&iter, &key, NULL)) { | |
98 | error_set(errp, QERR_QMP_EXTRA_MEMBER, (char *) key); | |
99 | } | |
100 | g_hash_table_unref(qiv->stack[qiv->nb_stack - 1].h); | |
101 | } | |
102 | ||
2c7ff933 | 103 | assert(qiv->nb_stack > 0); |
c40cc0a0 | 104 | qiv->nb_stack--; |
c40cc0a0 MR |
105 | } |
106 | ||
107 | static void qmp_input_start_struct(Visitor *v, void **obj, const char *kind, | |
108 | const char *name, size_t size, Error **errp) | |
109 | { | |
110 | QmpInputVisitor *qiv = to_qiv(v); | |
4faaec6a | 111 | QObject *qobj = qmp_input_get_object(qiv, name); |
8b714d37 | 112 | Error *err = NULL; |
c40cc0a0 MR |
113 | |
114 | if (!qobj || qobject_type(qobj) != QTYPE_QDICT) { | |
115 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", | |
116 | "QDict"); | |
117 | return; | |
118 | } | |
119 | ||
8b714d37 PB |
120 | qmp_input_push(qiv, qobj, &err); |
121 | if (err) { | |
122 | error_propagate(errp, err); | |
c40cc0a0 MR |
123 | return; |
124 | } | |
125 | ||
126 | if (obj) { | |
7267c094 | 127 | *obj = g_malloc0(size); |
c40cc0a0 MR |
128 | } |
129 | } | |
130 | ||
131 | static void qmp_input_end_struct(Visitor *v, Error **errp) | |
132 | { | |
133 | QmpInputVisitor *qiv = to_qiv(v); | |
134 | ||
135 | qmp_input_pop(qiv, errp); | |
136 | } | |
137 | ||
138 | static void qmp_input_start_list(Visitor *v, const char *name, Error **errp) | |
139 | { | |
140 | QmpInputVisitor *qiv = to_qiv(v); | |
4faaec6a | 141 | QObject *qobj = qmp_input_get_object(qiv, name); |
c40cc0a0 MR |
142 | |
143 | if (!qobj || qobject_type(qobj) != QTYPE_QLIST) { | |
144 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", | |
145 | "list"); | |
146 | return; | |
147 | } | |
148 | ||
149 | qmp_input_push(qiv, qobj, errp); | |
150 | } | |
151 | ||
152 | static GenericList *qmp_input_next_list(Visitor *v, GenericList **list, | |
153 | Error **errp) | |
154 | { | |
155 | QmpInputVisitor *qiv = to_qiv(v); | |
156 | GenericList *entry; | |
157 | StackObject *so = &qiv->stack[qiv->nb_stack - 1]; | |
3a86a0fa PB |
158 | bool first; |
159 | ||
160 | if (so->entry == NULL) { | |
161 | so->entry = qlist_first(qobject_to_qlist(so->obj)); | |
162 | first = true; | |
163 | } else { | |
164 | so->entry = qlist_next(so->entry); | |
165 | first = false; | |
166 | } | |
c40cc0a0 MR |
167 | |
168 | if (so->entry == NULL) { | |
169 | return NULL; | |
170 | } | |
171 | ||
7267c094 | 172 | entry = g_malloc0(sizeof(*entry)); |
3a86a0fa PB |
173 | if (first) { |
174 | *list = entry; | |
175 | } else { | |
c40cc0a0 MR |
176 | (*list)->next = entry; |
177 | } | |
c40cc0a0 MR |
178 | |
179 | return entry; | |
180 | } | |
181 | ||
182 | static void qmp_input_end_list(Visitor *v, Error **errp) | |
183 | { | |
184 | QmpInputVisitor *qiv = to_qiv(v); | |
185 | ||
186 | qmp_input_pop(qiv, errp); | |
187 | } | |
188 | ||
189 | static void qmp_input_type_int(Visitor *v, int64_t *obj, const char *name, | |
190 | Error **errp) | |
191 | { | |
192 | QmpInputVisitor *qiv = to_qiv(v); | |
4faaec6a | 193 | QObject *qobj = qmp_input_get_object(qiv, name); |
c40cc0a0 MR |
194 | |
195 | if (!qobj || qobject_type(qobj) != QTYPE_QINT) { | |
196 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", | |
197 | "integer"); | |
198 | return; | |
199 | } | |
200 | ||
201 | *obj = qint_get_int(qobject_to_qint(qobj)); | |
202 | } | |
203 | ||
204 | static void qmp_input_type_bool(Visitor *v, bool *obj, const char *name, | |
205 | Error **errp) | |
206 | { | |
207 | QmpInputVisitor *qiv = to_qiv(v); | |
4faaec6a | 208 | QObject *qobj = qmp_input_get_object(qiv, name); |
c40cc0a0 MR |
209 | |
210 | if (!qobj || qobject_type(qobj) != QTYPE_QBOOL) { | |
211 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", | |
212 | "boolean"); | |
213 | return; | |
214 | } | |
215 | ||
216 | *obj = qbool_get_int(qobject_to_qbool(qobj)); | |
217 | } | |
218 | ||
219 | static void qmp_input_type_str(Visitor *v, char **obj, const char *name, | |
220 | Error **errp) | |
221 | { | |
222 | QmpInputVisitor *qiv = to_qiv(v); | |
4faaec6a | 223 | QObject *qobj = qmp_input_get_object(qiv, name); |
c40cc0a0 MR |
224 | |
225 | if (!qobj || qobject_type(qobj) != QTYPE_QSTRING) { | |
226 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", | |
227 | "string"); | |
228 | return; | |
229 | } | |
230 | ||
7267c094 | 231 | *obj = g_strdup(qstring_get_str(qobject_to_qstring(qobj))); |
c40cc0a0 MR |
232 | } |
233 | ||
234 | static void qmp_input_type_number(Visitor *v, double *obj, const char *name, | |
235 | Error **errp) | |
236 | { | |
237 | QmpInputVisitor *qiv = to_qiv(v); | |
4faaec6a | 238 | QObject *qobj = qmp_input_get_object(qiv, name); |
c40cc0a0 MR |
239 | |
240 | if (!qobj || qobject_type(qobj) != QTYPE_QFLOAT) { | |
241 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", | |
242 | "double"); | |
243 | return; | |
244 | } | |
245 | ||
246 | *obj = qfloat_get_double(qobject_to_qfloat(qobj)); | |
247 | } | |
248 | ||
c40cc0a0 MR |
249 | static void qmp_input_start_optional(Visitor *v, bool *present, |
250 | const char *name, Error **errp) | |
251 | { | |
252 | QmpInputVisitor *qiv = to_qiv(v); | |
4faaec6a | 253 | QObject *qobj = qmp_input_get_object(qiv, name); |
c40cc0a0 MR |
254 | |
255 | if (!qobj) { | |
256 | *present = false; | |
257 | return; | |
258 | } | |
259 | ||
260 | *present = true; | |
261 | } | |
262 | ||
c40cc0a0 MR |
263 | Visitor *qmp_input_get_visitor(QmpInputVisitor *v) |
264 | { | |
265 | return &v->visitor; | |
266 | } | |
267 | ||
268 | void qmp_input_visitor_cleanup(QmpInputVisitor *v) | |
269 | { | |
4faaec6a | 270 | qobject_decref(v->stack[0].obj); |
7267c094 | 271 | g_free(v); |
c40cc0a0 MR |
272 | } |
273 | ||
274 | QmpInputVisitor *qmp_input_visitor_new(QObject *obj) | |
275 | { | |
276 | QmpInputVisitor *v; | |
277 | ||
7267c094 | 278 | v = g_malloc0(sizeof(*v)); |
c40cc0a0 MR |
279 | |
280 | v->visitor.start_struct = qmp_input_start_struct; | |
281 | v->visitor.end_struct = qmp_input_end_struct; | |
282 | v->visitor.start_list = qmp_input_start_list; | |
283 | v->visitor.next_list = qmp_input_next_list; | |
284 | v->visitor.end_list = qmp_input_end_list; | |
0f71a1e0 | 285 | v->visitor.type_enum = input_type_enum; |
c40cc0a0 MR |
286 | v->visitor.type_int = qmp_input_type_int; |
287 | v->visitor.type_bool = qmp_input_type_bool; | |
288 | v->visitor.type_str = qmp_input_type_str; | |
289 | v->visitor.type_number = qmp_input_type_number; | |
290 | v->visitor.start_optional = qmp_input_start_optional; | |
c40cc0a0 | 291 | |
4faaec6a PB |
292 | qmp_input_push(v, obj, NULL); |
293 | qobject_incref(obj); | |
c40cc0a0 MR |
294 | |
295 | return v; | |
296 | } | |
e38ac962 PB |
297 | |
298 | QmpInputVisitor *qmp_input_visitor_new_strict(QObject *obj) | |
299 | { | |
300 | QmpInputVisitor *v; | |
301 | ||
302 | v = qmp_input_visitor_new(obj); | |
303 | v->strict = true; | |
304 | ||
305 | return v; | |
306 | } |