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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" | |
15 | #include "qemu-queue.h" | |
16 | #include "qemu-common.h" | |
17 | #include "qemu-objects.h" | |
18 | #include "qerror.h" | |
19 | ||
20 | #define QIV_STACK_SIZE 1024 | |
21 | ||
22 | typedef struct StackObject | |
23 | { | |
24 | const QObject *obj; | |
25 | const QListEntry *entry; | |
26 | } StackObject; | |
27 | ||
28 | struct QmpInputVisitor | |
29 | { | |
30 | Visitor visitor; | |
31 | QObject *obj; | |
32 | StackObject stack[QIV_STACK_SIZE]; | |
33 | int nb_stack; | |
34 | }; | |
35 | ||
36 | static QmpInputVisitor *to_qiv(Visitor *v) | |
37 | { | |
38 | return container_of(v, QmpInputVisitor, visitor); | |
39 | } | |
40 | ||
41 | static const QObject *qmp_input_get_object(QmpInputVisitor *qiv, | |
42 | const char *name) | |
43 | { | |
44 | const QObject *qobj; | |
45 | ||
46 | if (qiv->nb_stack == 0) { | |
47 | qobj = qiv->obj; | |
48 | } else { | |
49 | qobj = qiv->stack[qiv->nb_stack - 1].obj; | |
50 | } | |
51 | ||
47c6d3ec PB |
52 | if (qobj) { |
53 | if (name && qobject_type(qobj) == QTYPE_QDICT) { | |
54 | return qdict_get(qobject_to_qdict(qobj), name); | |
55 | } else if (qiv->nb_stack > 0 && qobject_type(qobj) == QTYPE_QLIST) { | |
56 | return qlist_entry_obj(qiv->stack[qiv->nb_stack - 1].entry); | |
57 | } | |
c40cc0a0 MR |
58 | } |
59 | ||
60 | return qobj; | |
61 | } | |
62 | ||
63 | static void qmp_input_push(QmpInputVisitor *qiv, const QObject *obj, Error **errp) | |
64 | { | |
65 | qiv->stack[qiv->nb_stack].obj = obj; | |
66 | if (qobject_type(obj) == QTYPE_QLIST) { | |
67 | qiv->stack[qiv->nb_stack].entry = qlist_first(qobject_to_qlist(obj)); | |
68 | } | |
69 | qiv->nb_stack++; | |
70 | ||
71 | if (qiv->nb_stack >= QIV_STACK_SIZE) { | |
72 | error_set(errp, QERR_BUFFER_OVERRUN); | |
73 | return; | |
74 | } | |
75 | } | |
76 | ||
77 | static void qmp_input_pop(QmpInputVisitor *qiv, Error **errp) | |
78 | { | |
79 | qiv->nb_stack--; | |
80 | if (qiv->nb_stack < 0) { | |
81 | error_set(errp, QERR_BUFFER_OVERRUN); | |
82 | return; | |
83 | } | |
84 | } | |
85 | ||
86 | static void qmp_input_start_struct(Visitor *v, void **obj, const char *kind, | |
87 | const char *name, size_t size, Error **errp) | |
88 | { | |
89 | QmpInputVisitor *qiv = to_qiv(v); | |
90 | const QObject *qobj = qmp_input_get_object(qiv, name); | |
91 | ||
92 | if (!qobj || qobject_type(qobj) != QTYPE_QDICT) { | |
93 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", | |
94 | "QDict"); | |
95 | return; | |
96 | } | |
97 | ||
98 | qmp_input_push(qiv, qobj, errp); | |
99 | if (error_is_set(errp)) { | |
100 | return; | |
101 | } | |
102 | ||
103 | if (obj) { | |
7267c094 | 104 | *obj = g_malloc0(size); |
c40cc0a0 MR |
105 | } |
106 | } | |
107 | ||
108 | static void qmp_input_end_struct(Visitor *v, Error **errp) | |
109 | { | |
110 | QmpInputVisitor *qiv = to_qiv(v); | |
111 | ||
112 | qmp_input_pop(qiv, errp); | |
113 | } | |
114 | ||
115 | static void qmp_input_start_list(Visitor *v, const char *name, Error **errp) | |
116 | { | |
117 | QmpInputVisitor *qiv = to_qiv(v); | |
118 | const QObject *qobj = qmp_input_get_object(qiv, name); | |
119 | ||
120 | if (!qobj || qobject_type(qobj) != QTYPE_QLIST) { | |
121 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", | |
122 | "list"); | |
123 | return; | |
124 | } | |
125 | ||
126 | qmp_input_push(qiv, qobj, errp); | |
127 | } | |
128 | ||
129 | static GenericList *qmp_input_next_list(Visitor *v, GenericList **list, | |
130 | Error **errp) | |
131 | { | |
132 | QmpInputVisitor *qiv = to_qiv(v); | |
133 | GenericList *entry; | |
134 | StackObject *so = &qiv->stack[qiv->nb_stack - 1]; | |
135 | ||
136 | if (so->entry == NULL) { | |
137 | return NULL; | |
138 | } | |
139 | ||
7267c094 | 140 | entry = g_malloc0(sizeof(*entry)); |
c40cc0a0 MR |
141 | if (*list) { |
142 | so->entry = qlist_next(so->entry); | |
143 | if (so->entry == NULL) { | |
7267c094 | 144 | g_free(entry); |
c40cc0a0 MR |
145 | return NULL; |
146 | } | |
147 | (*list)->next = entry; | |
148 | } | |
c40cc0a0 MR |
149 | |
150 | return entry; | |
151 | } | |
152 | ||
153 | static void qmp_input_end_list(Visitor *v, Error **errp) | |
154 | { | |
155 | QmpInputVisitor *qiv = to_qiv(v); | |
156 | ||
157 | qmp_input_pop(qiv, errp); | |
158 | } | |
159 | ||
160 | static void qmp_input_type_int(Visitor *v, int64_t *obj, const char *name, | |
161 | Error **errp) | |
162 | { | |
163 | QmpInputVisitor *qiv = to_qiv(v); | |
164 | const QObject *qobj = qmp_input_get_object(qiv, name); | |
165 | ||
166 | if (!qobj || qobject_type(qobj) != QTYPE_QINT) { | |
167 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", | |
168 | "integer"); | |
169 | return; | |
170 | } | |
171 | ||
172 | *obj = qint_get_int(qobject_to_qint(qobj)); | |
173 | } | |
174 | ||
175 | static void qmp_input_type_bool(Visitor *v, bool *obj, const char *name, | |
176 | Error **errp) | |
177 | { | |
178 | QmpInputVisitor *qiv = to_qiv(v); | |
179 | const QObject *qobj = qmp_input_get_object(qiv, name); | |
180 | ||
181 | if (!qobj || qobject_type(qobj) != QTYPE_QBOOL) { | |
182 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", | |
183 | "boolean"); | |
184 | return; | |
185 | } | |
186 | ||
187 | *obj = qbool_get_int(qobject_to_qbool(qobj)); | |
188 | } | |
189 | ||
190 | static void qmp_input_type_str(Visitor *v, char **obj, const char *name, | |
191 | Error **errp) | |
192 | { | |
193 | QmpInputVisitor *qiv = to_qiv(v); | |
194 | const QObject *qobj = qmp_input_get_object(qiv, name); | |
195 | ||
196 | if (!qobj || qobject_type(qobj) != QTYPE_QSTRING) { | |
197 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", | |
198 | "string"); | |
199 | return; | |
200 | } | |
201 | ||
7267c094 | 202 | *obj = g_strdup(qstring_get_str(qobject_to_qstring(qobj))); |
c40cc0a0 MR |
203 | } |
204 | ||
205 | static void qmp_input_type_number(Visitor *v, double *obj, const char *name, | |
206 | Error **errp) | |
207 | { | |
208 | QmpInputVisitor *qiv = to_qiv(v); | |
209 | const QObject *qobj = qmp_input_get_object(qiv, name); | |
210 | ||
211 | if (!qobj || qobject_type(qobj) != QTYPE_QFLOAT) { | |
212 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", | |
213 | "double"); | |
214 | return; | |
215 | } | |
216 | ||
217 | *obj = qfloat_get_double(qobject_to_qfloat(qobj)); | |
218 | } | |
219 | ||
220 | static void qmp_input_type_enum(Visitor *v, int *obj, const char *strings[], | |
221 | const char *kind, const char *name, | |
222 | Error **errp) | |
223 | { | |
224 | int64_t value = 0; | |
225 | char *enum_str; | |
226 | ||
227 | assert(strings); | |
228 | ||
229 | qmp_input_type_str(v, &enum_str, name, errp); | |
230 | if (error_is_set(errp)) { | |
231 | return; | |
232 | } | |
233 | ||
234 | while (strings[value] != NULL) { | |
235 | if (strcmp(strings[value], enum_str) == 0) { | |
236 | break; | |
237 | } | |
238 | value++; | |
239 | } | |
240 | ||
241 | if (strings[value] == NULL) { | |
242 | error_set(errp, QERR_INVALID_PARAMETER, name ? name : "null"); | |
e1bc2f7b | 243 | g_free(enum_str); |
c40cc0a0 MR |
244 | return; |
245 | } | |
246 | ||
e1bc2f7b | 247 | g_free(enum_str); |
c40cc0a0 MR |
248 | *obj = value; |
249 | } | |
250 | ||
251 | static void qmp_input_start_optional(Visitor *v, bool *present, | |
252 | const char *name, Error **errp) | |
253 | { | |
254 | QmpInputVisitor *qiv = to_qiv(v); | |
255 | const QObject *qobj = qmp_input_get_object(qiv, name); | |
256 | ||
257 | if (!qobj) { | |
258 | *present = false; | |
259 | return; | |
260 | } | |
261 | ||
262 | *present = true; | |
263 | } | |
264 | ||
265 | static void qmp_input_end_optional(Visitor *v, Error **errp) | |
266 | { | |
267 | } | |
268 | ||
269 | Visitor *qmp_input_get_visitor(QmpInputVisitor *v) | |
270 | { | |
271 | return &v->visitor; | |
272 | } | |
273 | ||
274 | void qmp_input_visitor_cleanup(QmpInputVisitor *v) | |
275 | { | |
276 | qobject_decref(v->obj); | |
7267c094 | 277 | g_free(v); |
c40cc0a0 MR |
278 | } |
279 | ||
280 | QmpInputVisitor *qmp_input_visitor_new(QObject *obj) | |
281 | { | |
282 | QmpInputVisitor *v; | |
283 | ||
7267c094 | 284 | v = g_malloc0(sizeof(*v)); |
c40cc0a0 MR |
285 | |
286 | v->visitor.start_struct = qmp_input_start_struct; | |
287 | v->visitor.end_struct = qmp_input_end_struct; | |
288 | v->visitor.start_list = qmp_input_start_list; | |
289 | v->visitor.next_list = qmp_input_next_list; | |
290 | v->visitor.end_list = qmp_input_end_list; | |
291 | v->visitor.type_enum = qmp_input_type_enum; | |
292 | v->visitor.type_int = qmp_input_type_int; | |
293 | v->visitor.type_bool = qmp_input_type_bool; | |
294 | v->visitor.type_str = qmp_input_type_str; | |
295 | v->visitor.type_number = qmp_input_type_number; | |
296 | v->visitor.start_optional = qmp_input_start_optional; | |
297 | v->visitor.end_optional = qmp_input_end_optional; | |
298 | ||
299 | v->obj = obj; | |
300 | qobject_incref(v->obj); | |
301 | ||
302 | return v; | |
303 | } |