target/arm: Convert Neon VCVT fixed-point to gvec
[qemu.git] / qapi / qobject-output-visitor.c
1 /*
2 * Core Definitions for QAPI/QMP Command Registry
3 *
4 * Copyright (C) 2012-2016 Red Hat, Inc.
5 * Copyright IBM, Corp. 2011
6 *
7 * Authors:
8 * Anthony Liguori <aliguori@us.ibm.com>
9 *
10 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
11 * See the COPYING.LIB file in the top-level directory.
12 *
13 */
14
15 #include "qemu/osdep.h"
16 #include "qapi/qobject-output-visitor.h"
17 #include "qapi/visitor-impl.h"
18 #include "qemu/queue.h"
19 #include "qapi/qmp/qbool.h"
20 #include "qapi/qmp/qdict.h"
21 #include "qapi/qmp/qlist.h"
22 #include "qapi/qmp/qnull.h"
23 #include "qapi/qmp/qnum.h"
24 #include "qapi/qmp/qstring.h"
25
26 typedef struct QStackEntry {
27 QObject *value;
28 void *qapi; /* sanity check that caller uses same pointer */
29 QSLIST_ENTRY(QStackEntry) node;
30 } QStackEntry;
31
32 struct QObjectOutputVisitor {
33 Visitor visitor;
34 QSLIST_HEAD(, QStackEntry) stack; /* Stack of unfinished containers */
35 QObject *root; /* Root of the output visit */
36 QObject **result; /* User's storage location for result */
37 };
38
39 #define qobject_output_add(qov, name, value) \
40 qobject_output_add_obj(qov, name, QOBJECT(value))
41 #define qobject_output_push(qov, value, qapi) \
42 qobject_output_push_obj(qov, QOBJECT(value), qapi)
43
44 static QObjectOutputVisitor *to_qov(Visitor *v)
45 {
46 return container_of(v, QObjectOutputVisitor, visitor);
47 }
48
49 /* Push @value onto the stack of current QObjects being built */
50 static void qobject_output_push_obj(QObjectOutputVisitor *qov, QObject *value,
51 void *qapi)
52 {
53 QStackEntry *e = g_malloc0(sizeof(*e));
54
55 assert(qov->root);
56 assert(value);
57 e->value = value;
58 e->qapi = qapi;
59 QSLIST_INSERT_HEAD(&qov->stack, e, node);
60 }
61
62 /* Pop a value off the stack of QObjects being built, and return it. */
63 static QObject *qobject_output_pop(QObjectOutputVisitor *qov, void *qapi)
64 {
65 QStackEntry *e = QSLIST_FIRST(&qov->stack);
66 QObject *value;
67
68 assert(e);
69 assert(e->qapi == qapi);
70 QSLIST_REMOVE_HEAD(&qov->stack, node);
71 value = e->value;
72 assert(value);
73 g_free(e);
74 return value;
75 }
76
77 /* Add @value to the current QObject being built.
78 * If the stack is visiting a dictionary or list, @value is now owned
79 * by that container. Otherwise, @value is now the root. */
80 static void qobject_output_add_obj(QObjectOutputVisitor *qov, const char *name,
81 QObject *value)
82 {
83 QStackEntry *e = QSLIST_FIRST(&qov->stack);
84 QObject *cur = e ? e->value : NULL;
85
86 if (!cur) {
87 /* Don't allow reuse of visitor on more than one root */
88 assert(!qov->root);
89 qov->root = value;
90 } else {
91 switch (qobject_type(cur)) {
92 case QTYPE_QDICT:
93 assert(name);
94 qdict_put_obj(qobject_to(QDict, cur), name, value);
95 break;
96 case QTYPE_QLIST:
97 assert(!name);
98 qlist_append_obj(qobject_to(QList, cur), value);
99 break;
100 default:
101 g_assert_not_reached();
102 }
103 }
104 }
105
106 static bool qobject_output_start_struct(Visitor *v, const char *name,
107 void **obj, size_t unused, Error **errp)
108 {
109 QObjectOutputVisitor *qov = to_qov(v);
110 QDict *dict = qdict_new();
111
112 qobject_output_add(qov, name, dict);
113 qobject_output_push(qov, dict, obj);
114 return true;
115 }
116
117 static void qobject_output_end_struct(Visitor *v, void **obj)
118 {
119 QObjectOutputVisitor *qov = to_qov(v);
120 QObject *value = qobject_output_pop(qov, obj);
121 assert(qobject_type(value) == QTYPE_QDICT);
122 }
123
124 static bool qobject_output_start_list(Visitor *v, const char *name,
125 GenericList **listp, size_t size,
126 Error **errp)
127 {
128 QObjectOutputVisitor *qov = to_qov(v);
129 QList *list = qlist_new();
130
131 qobject_output_add(qov, name, list);
132 qobject_output_push(qov, list, listp);
133 return true;
134 }
135
136 static GenericList *qobject_output_next_list(Visitor *v, GenericList *tail,
137 size_t size)
138 {
139 return tail->next;
140 }
141
142 static void qobject_output_end_list(Visitor *v, void **obj)
143 {
144 QObjectOutputVisitor *qov = to_qov(v);
145 QObject *value = qobject_output_pop(qov, obj);
146 assert(qobject_type(value) == QTYPE_QLIST);
147 }
148
149 static bool qobject_output_type_int64(Visitor *v, const char *name,
150 int64_t *obj, Error **errp)
151 {
152 QObjectOutputVisitor *qov = to_qov(v);
153 qobject_output_add(qov, name, qnum_from_int(*obj));
154 return true;
155 }
156
157 static bool qobject_output_type_uint64(Visitor *v, const char *name,
158 uint64_t *obj, Error **errp)
159 {
160 QObjectOutputVisitor *qov = to_qov(v);
161 qobject_output_add(qov, name, qnum_from_uint(*obj));
162 return true;
163 }
164
165 static bool qobject_output_type_bool(Visitor *v, const char *name, bool *obj,
166 Error **errp)
167 {
168 QObjectOutputVisitor *qov = to_qov(v);
169 qobject_output_add(qov, name, qbool_from_bool(*obj));
170 return true;
171 }
172
173 static bool qobject_output_type_str(Visitor *v, const char *name, char **obj,
174 Error **errp)
175 {
176 QObjectOutputVisitor *qov = to_qov(v);
177 if (*obj) {
178 qobject_output_add(qov, name, qstring_from_str(*obj));
179 } else {
180 qobject_output_add(qov, name, qstring_from_str(""));
181 }
182 return true;
183 }
184
185 static bool qobject_output_type_number(Visitor *v, const char *name,
186 double *obj, Error **errp)
187 {
188 QObjectOutputVisitor *qov = to_qov(v);
189 qobject_output_add(qov, name, qnum_from_double(*obj));
190 return true;
191 }
192
193 static bool qobject_output_type_any(Visitor *v, const char *name,
194 QObject **obj, Error **errp)
195 {
196 QObjectOutputVisitor *qov = to_qov(v);
197
198 qobject_output_add_obj(qov, name, qobject_ref(*obj));
199 return true;
200 }
201
202 static bool qobject_output_type_null(Visitor *v, const char *name,
203 QNull **obj, Error **errp)
204 {
205 QObjectOutputVisitor *qov = to_qov(v);
206 qobject_output_add(qov, name, qnull());
207 return true;
208 }
209
210 /* Finish building, and return the root object.
211 * The root object is never null. The caller becomes the object's
212 * owner, and should use qobject_unref() when done with it. */
213 static void qobject_output_complete(Visitor *v, void *opaque)
214 {
215 QObjectOutputVisitor *qov = to_qov(v);
216
217 /* A visit must have occurred, with each start paired with end. */
218 assert(qov->root && QSLIST_EMPTY(&qov->stack));
219 assert(opaque == qov->result);
220
221 *qov->result = qobject_ref(qov->root);
222 qov->result = NULL;
223 }
224
225 static void qobject_output_free(Visitor *v)
226 {
227 QObjectOutputVisitor *qov = to_qov(v);
228 QStackEntry *e;
229
230 while (!QSLIST_EMPTY(&qov->stack)) {
231 e = QSLIST_FIRST(&qov->stack);
232 QSLIST_REMOVE_HEAD(&qov->stack, node);
233 g_free(e);
234 }
235
236 qobject_unref(qov->root);
237 g_free(qov);
238 }
239
240 Visitor *qobject_output_visitor_new(QObject **result)
241 {
242 QObjectOutputVisitor *v;
243
244 v = g_malloc0(sizeof(*v));
245
246 v->visitor.type = VISITOR_OUTPUT;
247 v->visitor.start_struct = qobject_output_start_struct;
248 v->visitor.end_struct = qobject_output_end_struct;
249 v->visitor.start_list = qobject_output_start_list;
250 v->visitor.next_list = qobject_output_next_list;
251 v->visitor.end_list = qobject_output_end_list;
252 v->visitor.type_int64 = qobject_output_type_int64;
253 v->visitor.type_uint64 = qobject_output_type_uint64;
254 v->visitor.type_bool = qobject_output_type_bool;
255 v->visitor.type_str = qobject_output_type_str;
256 v->visitor.type_number = qobject_output_type_number;
257 v->visitor.type_any = qobject_output_type_any;
258 v->visitor.type_null = qobject_output_type_null;
259 v->visitor.complete = qobject_output_complete;
260 v->visitor.free = qobject_output_free;
261
262 *result = NULL;
263 v->result = result;
264
265 return &v->visitor;
266 }