qobject: introduce qstring_get_try_str()
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>
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@ -27,6 +27,7 @@ QString *qstring_from_str(const char *str);
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QString *qstring_from_substr(const char *str, int start, int end);
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QString *qstring_from_substr(const char *str, int start, int end);
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size_t qstring_get_length(const QString *qstring);
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size_t qstring_get_length(const QString *qstring);
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const char *qstring_get_str(const QString *qstring);
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const char *qstring_get_str(const QString *qstring);
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const char *qstring_get_try_str(const QString *qstring);
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void qstring_append_int(QString *qstring, int64_t value);
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void qstring_append_int(QString *qstring, int64_t value);
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void qstring_append(QString *qstring, const char *str);
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void qstring_append(QString *qstring, const char *str);
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void qstring_append_chr(QString *qstring, int c);
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void qstring_append_chr(QString *qstring, int c);
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@ -116,6 +116,16 @@ const char *qstring_get_str(const QString *qstring)
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return qstring->string;
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return qstring->string;
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}
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}
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/**
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* qstring_get_try_str(): Return a pointer to the stored string
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*
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* NOTE: will return NULL if qstring is not provided.
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*/
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const char *qstring_get_try_str(const QString *qstring)
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{
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return qstring ? qstring_get_str(qstring) : NULL;
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}
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/**
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/**
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* qstring_is_equal(): Test whether the two QStrings are equal
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* qstring_is_equal(): Test whether the two QStrings are equal
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*/
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*/
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