QDict: Introduce new iteration API

It's composed of functions qdict_first() and qdict_next(), plus
functions to access QDictEntry values.

This API was suggested by Markus Armbruster <armbru@redhat.com> and
it offers full control over the iteration process.

The usage is simple, the following example prints all keys in 'qdict'
(it's hopefully better than any English description):

   QDict *qdict;
   const QDictEntry *ent;

   [...]

   for (ent = qdict_first(qdict); ent; ent = qdict_next(qdict, ent)) {
        printf("%s ", qdict_entry_key(ent));
    }

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/qdict.h b/qdict.h
index 0c8de3c9c2..0e7a43fcb9 100644
--- a/qdict.h
+++ b/qdict.h
@@ -45,6 +45,8 @@ QDict *qobject_to_qdict(const QObject *obj);
 void qdict_iter(const QDict *qdict,
                 void (*iter)(const char *key, QObject *obj, void *opaque),
                 void *opaque);
+const QDictEntry *qdict_first(const QDict *qdict);
+const QDictEntry *qdict_next(const QDict *qdict, const QDictEntry *entry);
 
 /* Helper to qdict_put_obj(), accepts any object */
 #define qdict_put(qdict, key, obj) \