This function splits a QDict consisting of entries prefixed by
incrementally enumerated indices into a QList of QDicts.
Signed-off-by: Max Reitz <mre...@redhat.com>
Reviewed-by: Kevin Wolf <kw...@redhat.com>
---
include/qapi/qmp/qdict.h | 1 +
qobject/qdict.c | 36 ++++++++++++++++++++++++++++++++++++
2 files changed, 37 insertions(+)
diff --git a/include/qapi/qmp/qdict.h b/include/qapi/qmp/qdict.h
index 5cefd80..1ddf97b 100644
--- a/include/qapi/qmp/qdict.h
+++ b/include/qapi/qmp/qdict.h
@@ -68,5 +68,6 @@ QDict *qdict_clone_shallow(const QDict *src);
void qdict_flatten(QDict *qdict);
void qdict_extract_subqdict(QDict *src, QDict **dst, const char *start);
+void qdict_array_split(QDict *src, QList **dst);
#endif /* QDICT_H */
diff --git a/qobject/qdict.c b/qobject/qdict.c
index 17e14f0..fca1902 100644
--- a/qobject/qdict.c
+++ b/qobject/qdict.c
@@ -554,3 +554,39 @@ void qdict_extract_subqdict(QDict *src, QDict **dst, const
char *start)
entry = next;
}
}
+
+/**
+ * qdict_array_split(): This function creates a QList of QDicts. Every entry in
+ * the original QDict with a key prefixed "%u.", where %u designates an
unsigned
+ * integer starting at 0 and incrementally counting up, will be moved to a new
+ * QDict at index %u in the output QList with the key prefix removed. The
+ * function terminates when there is no entry in the QDict with a prefix
+ * directly (incrementally) following the last one.
+ * Example: {"0.a": 42, "0.b": 23, "1.x": 0, "3.y": 1, "o.o": 7}
+ * (or {"1.x": 0, "3.y": 1, "0.a": 42, "o.o": 7, "0.b": 23})
+ * => [{"a": 42, "b": 23}, {"x": 0}]
+ * and {"3.y": 1, "o.o": 7} (remainder of the old QDict)
+ */
+void qdict_array_split(QDict *src, QList **dst)
+{
+ unsigned i;
+
+ *dst = qlist_new();
+
+ for (i = 0; i < UINT_MAX; i++) {
+ QDict *subqdict;
+ char prefix[32];
+ size_t snprintf_ret;
+
+ snprintf_ret = snprintf(prefix, 32, "%u.", i);
+ assert(snprintf_ret < 32);
+
+ qdict_extract_subqdict(src, &subqdict, prefix);
+ if (!qdict_size(subqdict)) {
+ QDECREF(subqdict);
+ break;
+ }
+
+ qlist_append_obj(*dst, QOBJECT(subqdict));
+ }
+}
--
1.8.5.1
