unicorn/qemu/qobject/qint.c
Markus Armbruster 218e3ab5d5
qfloat qint: Make conversion from QObject * accept null
qobject_to_qfloat() and qobject_to_qint() crash on null, which is a
trap for the unwary. Return null instead, and simplify a few callers.

Backports commit fcf73f66a67f5e58c18216f8c8651e38cf4d90af from qemu
2018-02-17 15:24:12 -05:00

68 lines
1.2 KiB
C

/*
* QInt Module
*
* Copyright (C) 2009 Red Hat Inc.
*
* Authors:
* Luiz Capitulino <lcapitulino@redhat.com>
*
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
* See the COPYING.LIB file in the top-level directory.
*/
#include "qapi/qmp/qint.h"
#include "qapi/qmp/qobject.h"
#include "qemu-common.h"
static void qint_destroy_obj(QObject *obj);
static const QType qint_type = {
QTYPE_QINT,
qint_destroy_obj,
};
/**
* qint_from_int(): Create a new QInt from an int64_t
*
* Return strong reference.
*/
QInt *qint_from_int(int64_t value)
{
QInt *qi;
qi = g_malloc(sizeof(*qi));
qi->value = value;
QOBJECT_INIT(qi, &qint_type);
return qi;
}
/**
* qint_get_int(): Get the stored integer
*/
int64_t qint_get_int(const QInt *qi)
{
return qi->value;
}
/**
* qobject_to_qint(): Convert a QObject into a QInt
*/
QInt *qobject_to_qint(const QObject *obj)
{
if (!obj || qobject_type(obj) != QTYPE_QINT) {
return NULL;
}
return container_of(obj, QInt, base);
}
/**
* qint_destroy_obj(): Free all memory allocated by a
* QInt object
*/
static void qint_destroy_obj(QObject *obj)
{
assert(obj != NULL);
g_free(qobject_to_qint(obj));
}