From: Peter Xu <pet...@redhat.com>
A quick way to fetch string from qobject when it's a QString.
Reviewed-by: Fam Zheng <f...@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
Signed-off-by: Peter Xu <pet...@redhat.com>
Message-Id: <20180309090006.10018-4-pet...@redhat.com>
Reviewed-by: Eric Blake <ebl...@redhat.com>
[eblake: rebase to qobject_to() macro]
Signed-off-by: Eric Blake <ebl...@redhat.com>
---
include/qapi/qmp/qstring.h | 1 +
qobject/qstring.c | 11 +++++++++++
2 files changed, 12 insertions(+)
diff --git a/include/qapi/qmp/qstring.h b/include/qapi/qmp/qstring.h
index 38c680b7185..30ae260a7fc 100644
--- a/include/qapi/qmp/qstring.h
+++ b/include/qapi/qmp/qstring.h
@@ -28,6 +28,7 @@ QString *qstring_from_substr(const char *str, int start, int
end);
size_t qstring_get_length(const QString *qstring);
const char *qstring_get_str(const QString *qstring);
const char *qstring_get_try_str(const QString *qstring);
+const char *qobject_get_try_str(const QObject *qstring);
void qstring_append_int(QString *qstring, int64_t value);
void qstring_append(QString *qstring, const char *str);
void qstring_append_chr(QString *qstring, int c);
diff --git a/qobject/qstring.c b/qobject/qstring.c
index 5777f0af231..afca54b47ae 100644
--- a/qobject/qstring.c
+++ b/qobject/qstring.c
@@ -126,6 +126,17 @@ const char *qstring_get_try_str(const QString *qstring)
return qstring ? qstring_get_str(qstring) : NULL;
}
+/**
+ * qobject_get_try_str(): Return a pointer to the corresponding string
+ *
+ * NOTE: the string will only be returned if the object is valid, and
+ * its type is QString, otherwise NULL is returned.
+ */
+const char *qobject_get_try_str(const QObject *qstring)
+{
+ return qstring_get_try_str(qobject_to(QString, qstring));
+}
+
/**
* qstring_is_equal(): Test whether the two QStrings are equal
*/
--
2.14.3
