LXR qemu/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 "qfloat.h"
  15#include "qobject.h"
  16#include "qemu-common.h"
  17
  18static void qfloat_destroy_obj(QObject *obj);
  19
  20static const QType qfloat_type = {
  21    .code = QTYPE_QFLOAT,
  22    .destroy = qfloat_destroy_obj,
  23};
  24
  25/**
  26 * qfloat_from_int(): Create a new QFloat from a float
  27 *
  28 * Return strong reference.
  29 */
  30QFloat *qfloat_from_double(double value)
  31{
  32    QFloat *qf;
  33
  34    qf = g_malloc(sizeof(*qf));
  35    qf->value = value;
  36    QOBJECT_INIT(qf, &qfloat_type);
  37
  38    return qf;
  39}
  40
  41/**
  42 * qfloat_get_double(): Get the stored float
  43 */
  44double qfloat_get_double(const QFloat *qf)
  45{
  46    return qf->value;
  47}
  48
  49/**
  50 * qobject_to_qfloat(): Convert a QObject into a QFloat
  51 */
  52QFloat *qobject_to_qfloat(const QObject *obj)
  53{
  54    if (qobject_type(obj) != QTYPE_QFLOAT)
  55        return NULL;
  56
  57    return container_of(obj, QFloat, base);
  58}
  59
  60/**
  61 * qfloat_destroy_obj(): Free all memory allocated by a
  62 * QFloat object
  63 */
  64static void qfloat_destroy_obj(QObject *obj)
  65{
  66    assert(obj != NULL);
  67    g_free(qobject_to_qfloat(obj));
  68}
  69