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| author | Peter Xu <peterx@redhat.com> | 2018-03-09 16:59:46 +0800 |
|---|---|---|
| committer | Eric Blake <eblake@redhat.com> | 2018-03-19 14:58:36 -0500 |
| commit | b26ae1cb8eb0756524e322169138830b9b542311 (patch) | |
| tree | 9f4eaabe2248cf82717c04d0dd5d274133cb06d4 | |
| parent | 775932020dd6bd7e9c1acc0d7779677d8b4c094c (diff) | |
| download | qemu-b26ae1cb8eb0756524e322169138830b9b542311.zip qemu-b26ae1cb8eb0756524e322169138830b9b542311.tar.gz qemu-b26ae1cb8eb0756524e322169138830b9b542311.tar.bz2 | |
qobject: introduce qobject_get_try_str()
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>
| -rw-r--r-- | include/qapi/qmp/qstring.h | 1 | ||||
| -rw-r--r-- | qobject/qstring.c | 11 |
2 files changed, 12 insertions, 0 deletions
diff --git a/include/qapi/qmp/qstring.h b/include/qapi/qmp/qstring.h index 38c680b..30ae260 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 5777f0a..afca54b 100644 --- a/qobject/qstring.c +++ b/qobject/qstring.c @@ -127,6 +127,17 @@ const char *qstring_get_try_str(const QString *qstring) } /** + * 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 */ bool qstring_is_equal(const QObject *x, const QObject *y) |