meson: convert hw/xen
[qemu.git] / qobject / qobject.c
1 /*
2 * QObject
3 *
4 * Copyright (C) 2015 Red Hat, Inc.
5 *
6 * This work is licensed under the terms of the GNU LGPL, version 2.1
7 * or later. See the COPYING.LIB file in the top-level directory.
8 */
9
10 #include "qemu/osdep.h"
11 #include "qapi/qmp/qbool.h"
12 #include "qapi/qmp/qnull.h"
13 #include "qapi/qmp/qnum.h"
14 #include "qapi/qmp/qdict.h"
15 #include "qapi/qmp/qlist.h"
16 #include "qapi/qmp/qstring.h"
17
18 QEMU_BUILD_BUG_MSG(
19 offsetof(QNull, base) != 0 ||
20 offsetof(QNum, base) != 0 ||
21 offsetof(QString, base) != 0 ||
22 offsetof(QDict, base) != 0 ||
23 offsetof(QList, base) != 0 ||
24 offsetof(QBool, base) != 0,
25 "base qobject must be at offset 0");
26
27 static void (*qdestroy[QTYPE__MAX])(QObject *) = {
28 [QTYPE_NONE] = NULL, /* No such object exists */
29 [QTYPE_QNULL] = NULL, /* qnull_ is indestructible */
30 [QTYPE_QNUM] = qnum_destroy_obj,
31 [QTYPE_QSTRING] = qstring_destroy_obj,
32 [QTYPE_QDICT] = qdict_destroy_obj,
33 [QTYPE_QLIST] = qlist_destroy_obj,
34 [QTYPE_QBOOL] = qbool_destroy_obj,
35 };
36
37 void qobject_destroy(QObject *obj)
38 {
39 assert(!obj->base.refcnt);
40 assert(QTYPE_QNULL < obj->base.type && obj->base.type < QTYPE__MAX);
41 qdestroy[obj->base.type](obj);
42 }
43
44
45 static bool (*qis_equal[QTYPE__MAX])(const QObject *, const QObject *) = {
46 [QTYPE_NONE] = NULL, /* No such object exists */
47 [QTYPE_QNULL] = qnull_is_equal,
48 [QTYPE_QNUM] = qnum_is_equal,
49 [QTYPE_QSTRING] = qstring_is_equal,
50 [QTYPE_QDICT] = qdict_is_equal,
51 [QTYPE_QLIST] = qlist_is_equal,
52 [QTYPE_QBOOL] = qbool_is_equal,
53 };
54
55 bool qobject_is_equal(const QObject *x, const QObject *y)
56 {
57 /* We cannot test x == y because an object does not need to be
58 * equal to itself (e.g. NaN floats are not). */
59
60 if (!x && !y) {
61 return true;
62 }
63
64 if (!x || !y || x->base.type != y->base.type) {
65 return false;
66 }
67
68 assert(QTYPE_NONE < x->base.type && x->base.type < QTYPE__MAX);
69
70 return qis_equal[x->base.type](x, y);
71 }