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 "qapi/qmp/qfloat.h"
  15 #include "qapi/qmp/qobject.h"
  16 #include "qemu-common.h"
  17
  18 /**
  19  * qfloat_from_int(): Create a new QFloat from a float
  20  *
  21  * Return strong reference.
  22  */
  23 QFloat *qfloat_from_double(double value)
  24 {
  25     QFloat *qf;
  26
  27     qf = g_malloc(sizeof(*qf));
  28     qobject_init(QOBJECT(qf), QTYPE_QFLOAT);
  29     qf->value = value;
  30
  31     return qf;
  32 }
  33
  34 /**
  35  * qfloat_get_double(): Get the stored float
  36  */
  37 double qfloat_get_double(const QFloat *qf)
  38 {
  39     return qf->value;
  40 }
  41
  42 /**
  43  * qobject_to_qfloat(): Convert a QObject into a QFloat
  44  */
  45 QFloat *qobject_to_qfloat(const QObject *obj)
  46 {
  47     if (!obj || qobject_type(obj) != QTYPE_QFLOAT) {
  48         return NULL;
  49     }
  50     return container_of(obj, QFloat, base);
  51 }
  52
  53 /**
  54  * qfloat_destroy_obj(): Free all memory allocated by a
  55  * QFloat object
  56  */
  57 void qfloat_destroy_obj(QObject *obj)
  58 {
  59     assert(obj != NULL);
  60     g_free(qobject_to_qfloat(obj));
  61 }