Introduce QInt

QInt is a high-level data type that can be used to represent integers,
internally it stores an int64_t value.

The following functions are available:

- qint_from_int() Create a new QInt
- qint_get_int()  Get the stored integer

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/qint.c b/qint.c
new file mode 100644
index 000000000..9a5690689
--- /dev/null
+++ b/qint.c
@@ -0,0 +1,66 @@
+/*
+ * QInt data type.
+ *
+ * Copyright (C) 2009 Red Hat Inc.
+ *
+ * Authors:
+ *  Luiz Capitulino <lcapitulino@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ */
+#include "qint.h"
+#include "qobject.h"
+#include "qemu-common.h"
+
+static const QType qint_type;
+
+/**
+ * qint_from_int(): Create a new QInt from an int64_t
+ *
+ * Return strong reference.
+ */
+QInt *qint_from_int(int64_t value)
+{
+    QInt *qi;
+
+    qi = qemu_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 (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);
+    qemu_free(qobject_to_qint(obj));
+}
+
+static const QType qint_type = {
+    .code = QTYPE_QINT,
+    .destroy = qint_destroy_obj,
+};