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qobject: introduce qobject_get_try_str()

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A quick way to fetch string from qobject when it's a QString.

Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180309090006.10018-4-peterx@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[eblake: rebase to qobject_to() macro]
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Peter Xu 2018-03-09 16:59:46 +08:00 • committed by Eric Blake
parent 775932020d
commit b26ae1cb8e
2 changed files with 12 additions and 0 deletions
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include/qapi/qmp/qstring.h
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@ -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);