| 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 "qobject/qbool.h" |
| 12 | #include "qobject/qnull.h" |
| 13 | #include "qobject/qnum.h" |
| 14 | #include "qobject/qdict.h" |
| 15 | #include "qobject/qlist.h" |
| 16 | #include "qobject/qstring.h" |
| 17 | #include "qobject-internal.h" |
| 18 | |
| 19 | QEMU_BUILD_BUG_MSG( |
| 20 | offsetof(QNull, base) != 0 || |
| 21 | offsetof(QNum, base) != 0 || |
| 22 | offsetof(QString, base) != 0 || |
| 23 | offsetof(QDict, base) != 0 || |
| 24 | offsetof(QList, base) != 0 || |
| 25 | offsetof(QBool, base) != 0, |
| 26 | "base qobject must be at offset 0"); |
| 27 | |
| 28 | static void (*qdestroy[QTYPE__MAX])(QObject *) = { |
| 29 | [QTYPE_NONE] = NULL, /* No such object exists */ |
| 30 | [QTYPE_QNULL] = NULL, /* qnull_ is indestructible */ |
| 31 | [QTYPE_QNUM] = qnum_destroy_obj, |
| 32 | [QTYPE_QSTRING] = qstring_destroy_obj, |
| 33 | [QTYPE_QDICT] = qdict_destroy_obj, |
| 34 | [QTYPE_QLIST] = qlist_destroy_obj, |
| 35 | [QTYPE_QBOOL] = qbool_destroy_obj, |
| 36 | }; |
| 37 | |
| 38 | void qobject_destroy(QObject *obj) |
| 39 | { |
| 40 | assert(!obj->base.refcnt); |
| 41 | assert(QTYPE_QNULL < obj->base.type && obj->base.type < QTYPE__MAX); |
| 42 | qdestroy[obj->base.type](obj); |
| 43 | } |
| 44 | |
| 45 | |
| 46 | static bool (*qis_equal[QTYPE__MAX])(const QObject *, const QObject *) = { |
| 47 | [QTYPE_NONE] = NULL, /* No such object exists */ |
| 48 | [QTYPE_QNULL] = qnull_is_equal, |
| 49 | [QTYPE_QNUM] = qnum_is_equal, |
| 50 | [QTYPE_QSTRING] = qstring_is_equal, |
| 51 | [QTYPE_QDICT] = qdict_is_equal, |
| 52 | [QTYPE_QLIST] = qlist_is_equal, |
| 53 | [QTYPE_QBOOL] = qbool_is_equal, |
| 54 | }; |
| 55 | |
| 56 | bool qobject_is_equal(const QObject *x, const QObject *y) |
| 57 | { |
| 58 | /* We cannot test x == y because an object does not need to be |
| 59 | * equal to itself (e.g. NaN floats are not). */ |
| 60 | |
| 61 | if (!x && !y) { |
| 62 | return true; |
| 63 | } |
| 64 | |
| 65 | if (!x || !y || x->base.type != y->base.type) { |
| 66 | return false; |
| 67 | } |
| 68 | |
| 69 | assert(QTYPE_NONE < x->base.type && x->base.type < QTYPE__MAX); |
| 70 | |
| 71 | return qis_equal[x->base.type](x, y); |
| 72 | } |