qobject/qfloat.c

   1 /*
   2  * QFloat Module
   3  *
   4  * Copyright IBM, Corp. 2009
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
  10  * See the COPYING.LIB file in the top-level directory.
  11  *
  12  */
  13
  14 #include "qemu/osdep.h"
  15 #include "qapi/qmp/qfloat.h"
  16 #include "qapi/qmp/qobject.h"
  17 #include "qemu-common.h"
  18
  19 /**
  20  * qfloat_from_int(): Create a new QFloat from a float
  21  *
  22  * Return strong reference.
  23  */
  24 QFloat *qfloat_from_double(double value)
  25 {
  26     QFloat *qf;
  27
  28     qf = g_malloc(sizeof(*qf));
  29     qobject_init(QOBJECT(qf), QTYPE_QFLOAT);
  30     qf->value = value;
  31
  32     return qf;
  33 }
  34
  35 /**
  36  * qfloat_get_double(): Get the stored float
  37  */
  38 double qfloat_get_double(const QFloat *qf)
  39 {
  40     return qf->value;
  41 }
  42
  43 /**
  44  * qobject_to_qfloat(): Convert a QObject into a QFloat
  45  */
  46 QFloat *qobject_to_qfloat(const QObject *obj)
  47 {
  48     if (!obj || qobject_type(obj) != QTYPE_QFLOAT) {
  49         return NULL;
  50     }
  51     return container_of(obj, QFloat, base);
  52 }
  53
  54 /**
  55  * qfloat_destroy_obj(): Free all memory allocated by a
  56  * QFloat object
  57  */
  58 void qfloat_destroy_obj(QObject *obj)
  59 {
  60     assert(obj != NULL);
  61     g_free(qobject_to_qfloat(obj));
  62 }