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