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qobject: introduce qstring_get_try_str()

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The only difference from qstring_get_str() is that it allows the qstring
to be NULL.  If so, NULL is returned.

CC: Eric Blake <eblake@redhat.com>
CC: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180309090006.10018-3-peterx@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Peter Xu 2018-03-09 16:59:45 +08:00 • committed by Eric Blake
parent 378112b002
commit 775932020d
2 changed files with 11 additions and 0 deletions
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10
qobject/qstring.c
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@ -116,6 +116,16 @@ const char *qstring_get_str(const QString *qstring)
return qstring->string;
}
/**
* qstring_get_try_str(): Return a pointer to the stored string
*
* NOTE: will return NULL if qstring is not provided.
*/
const char *qstring_get_try_str(const QString *qstring)
{
return qstring ? qstring_get_str(qstring) : NULL;
}
/**
* qstring_is_equal(): Test whether the two QStrings are equal
*/