[Qemu-devel] [PATCH 2/3] Introduce QString data type

[Luiz Capitulino <lcapitulino@redhat.com>]

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
 Makefile  |    2 +-
 qobject.h |    1 +
 qstring.c |   89 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 qstring.h |   17 +++++++++++
 4 files changed, 108 insertions(+), 1 deletions(-)
 create mode 100644 qstring.c
 create mode 100644 qstring.h

diff --git a/Makefile b/Makefile
index 2ce539f..9e3faec 100644
--- a/Makefile
+++ b/Makefile
@@ -104,7 +104,7 @@ obj-y += buffered_file.o migration.o migration-tcp.o net.o qemu-sockets.o
 obj-y += qemu-char.o aio.o net-checksum.o savevm.o
 obj-y += msmouse.o ps2.o
 obj-y += qdev.o qdev-properties.o ssi.o
-obj-y += qdict.o
+obj-y += qdict.o qstring.o
 
 obj-$(CONFIG_BRLAPI) += baum.o
 
diff --git a/qobject.h b/qobject.h
index b70e669..d3378b1 100644
--- a/qobject.h
+++ b/qobject.h
@@ -16,6 +16,7 @@
 
 typedef enum {
     QTYPE_NONE,
+    QTYPE_QSTRING,
 } qtype_t;
 
 struct QObject;
diff --git a/qstring.c b/qstring.c
new file mode 100644
index 0000000..b1ddf7b
--- /dev/null
+++ b/qstring.c
@@ -0,0 +1,89 @@
+/*
+ * QString 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 "qobject.h"
+#include "qstring.h"
+#include "qemu-common.h"
+
+static QType qstring_type;
+
+/**
+ * qstring_from_str(): Create a new QString from a regular C string
+ *
+ * return new QString.
+ */
+QString *qstring_from_str(const char *str)
+{
+    QString *qstring;
+
+    qstring = qemu_mallocz(sizeof(*qstring));
+    qstring->string = qemu_strdup(str);
+    qstring->base.type = &qstring_type;
+
+    return qstring;
+}
+
+/**
+ * qstring_to_str(): Export QString to regular C string
+ *
+ * Return a pointer to a *copy* of the string.
+ */
+char *qstring_to_str(const QString *qstring)
+{
+    return qemu_strdup(qstring->string);
+}
+
+/**
+ * qstring_size(): Return QString string size
+ */
+size_t qstring_size(const QString *qstring)
+{
+    return strlen(qstring->string);
+}
+
+/**
+ * qstring_destroy(): Free all memory allocated by a QString
+ * object
+ */
+void qstring_destroy(QString *qstring)
+{
+    qemu_free(qstring->string);
+    qemu_free(qstring);
+}
+
+/**
+ * qstring_clone_obj(): Clone a QString object
+ *
+ * return a copy of the provided QString object.
+ */
+static QObject *qstring_clone_obj(const QObject *obj)
+{
+    QString *old, *new;
+
+    old = container_of(obj, QString, base);
+    new = qstring_from_str(old->string);
+    return &new->base;
+}
+
+/**
+ * qstring_destroy_obj(): Destroy a QString object
+ */
+static void qstring_destroy_obj(QObject *obj)
+{
+    QString *qstring = container_of(obj, QString, base);
+    qstring_destroy(qstring);
+}
+
+static QType qstring_type = {
+    .code = QTYPE_QSTRING,
+    .clone = qstring_clone_obj,
+    .destroy = qstring_destroy_obj,
+};
diff --git a/qstring.h b/qstring.h
new file mode 100644
index 0000000..1856a12
--- /dev/null
+++ b/qstring.h
@@ -0,0 +1,17 @@
+#ifndef QSTRING_H
+#define QSTRING_H
+
+#include <stddef.h>
+#include "qobject.h"
+
+typedef struct QString {
+    QObject base;
+    char *string;
+} QString;
+
+QString *qstring_from_str(const char *str);
+char *qstring_to_str(const QString *qstring);
+size_t qstring_size(const QString *qstring);
+void qstring_destroy(QString *qstring);
+
+#endif /* QSTRING_H */
-- 
1.6.4.rc3.12.gdf73a