From patchwork Wed Nov 11 17:28:56 2009
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Subject: [04/11] Add a QFloat datatype
Date: Wed, 11 Nov 2009 07:28:56 -0000
From: Anthony Liguori <aliguori@us.ibm.com>
X-Patchwork-Id: 38159
Message-Id: <1257960543-26373-4-git-send-email-aliguori@us.ibm.com>
To: qemu-devel@nongnu.org
Cc: Anthony Liguori <aliguori@us.ibm.com>,
 Luiz Capitulino <lcapitulino@redhat.com>

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

---
Makefile  |    3 +-
 qfloat.c  |   76 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 qfloat.h  |   29 +++++++++++++++++++++++
 qobject.h |    1 +
 4 files changed, 108 insertions(+), 1 deletions(-)
 create mode 100644 qfloat.c
 create mode 100644 qfloat.h

diff --git a/Makefile b/Makefile
index 30f1c9d..8d94fda 100644
--- a/Makefile
+++ b/Makefile
@@ -135,7 +135,8 @@ obj-y += buffered_file.o migration.o migration-tcp.o qemu-sockets.o
 obj-y += qemu-char.o aio.o savevm.o
 obj-y += msmouse.o ps2.o
 obj-y += qdev.o qdev-properties.o
-obj-y += qint.o qstring.o qdict.o qlist.o qemu-config.o
+obj-y += qint.o qstring.o qdict.o qlist.o qfloat.o
+obj-y += qemu-config.o
 
 obj-$(CONFIG_BRLAPI) += baum.o
 obj-$(CONFIG_POSIX) += migration-exec.o migration-unix.o migration-fd.o
diff --git a/qfloat.c b/qfloat.c
new file mode 100644
index 0000000..05215f5
--- /dev/null
+++ b/qfloat.c
@@ -0,0 +1,76 @@
+/*
+ * QFloat Module
+ *
+ * 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.
+ *
+ * Copyright IBM, Corp. 2009
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.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 "qfloat.h"
+#include "qobject.h"
+#include "qemu-common.h"
+
+static void qfloat_destroy_obj(QObject *obj);
+
+static const QType qfloat_type = {
+    .code = QTYPE_QFLOAT,
+    .destroy = qfloat_destroy_obj,
+};
+
+/**
+ * qfloat_from_int(): Create a new QFloat from a float
+ *
+ * Return strong reference.
+ */
+QFloat *qfloat_from_double(double value)
+{
+    QFloat *qf;
+
+    qf = qemu_malloc(sizeof(*qf));
+    qf->value = value;
+    QOBJECT_INIT(qf, &qfloat_type);
+
+    return qf;
+}
+
+/**
+ * qfloat_get_double(): Get the stored float
+ */
+double qfloat_get_double(const QFloat *qf)
+{
+    return qf->value;
+}
+
+/**
+ * qobject_to_qfloat(): Convert a QObject into a QFloat
+ */
+QFloat *qobject_to_qfloat(const QObject *obj)
+{
+    if (qobject_type(obj) != QTYPE_QFLOAT)
+        return NULL;
+
+    return container_of(obj, QFloat, base);
+}
+
+/**
+ * qfloat_destroy_obj(): Free all memory allocated by a
+ * QFloat object
+ */
+static void qfloat_destroy_obj(QObject *obj)
+{
+    assert(obj != NULL);
+    qemu_free(qobject_to_qfloat(obj));
+}
diff --git a/qfloat.h b/qfloat.h
new file mode 100644
index 0000000..9d67876
--- /dev/null
+++ b/qfloat.h
@@ -0,0 +1,29 @@
+/*
+ * QFloat Module
+ *
+ * Copyright IBM, Corp. 2009
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.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.
+ *
+ */
+
+#ifndef QFLOAT_H
+#define QFLOAT_H
+
+#include <stdint.h>
+#include "qobject.h"
+
+typedef struct QFloat {
+    QObject_HEAD;
+    double value;
+} QFloat;
+
+QFloat *qfloat_from_double(double value);
+double qfloat_get_double(const QFloat *qi);
+QFloat *qobject_to_qfloat(const QObject *obj);
+
+#endif /* QFLOAT_H */
diff --git a/qobject.h b/qobject.h
index 76f669f..67b03d0 100644
--- a/qobject.h
+++ b/qobject.h
@@ -41,6 +41,7 @@ typedef enum {
     QTYPE_QSTRING,
     QTYPE_QDICT,
     QTYPE_QLIST,
+    QTYPE_QFLOAT,
 } qtype_code;
 
 struct QObject;