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 | } |
72 | |