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authorMax Reitz <mreitz@redhat.com>2013-12-20 19:28:03 +0100
committerKevin Wolf <kwolf@redhat.com>2014-01-22 12:07:17 +0100
commit05a8c2227157eda2540404999c4615d3bf343c18 (patch)
tree28be98f39111838a693d89a9b0a4bddeb653a956 /qobject
parentd4881b9bcbbadc83ffa5d8e6d2d6deb36cd8faa6 (diff)
downloadqemu-arm-05a8c2227157eda2540404999c4615d3bf343c18.tar.gz
qdict: Add qdict_array_split()
This function splits a QDict consisting of entries prefixed by incrementally enumerated indices into a QList of QDicts. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qobject')
-rw-r--r--qobject/qdict.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/qobject/qdict.c b/qobject/qdict.c
index 17e14f08b1..2d5848d7d7 100644
--- a/qobject/qdict.c
+++ b/qobject/qdict.c
@@ -554,3 +554,40 @@ void qdict_extract_subqdict(QDict *src, QDict **dst, const char *start)
entry = next;
}
}
+
+/**
+ * qdict_array_split(): This function moves array-like elements of a QDict into
+ * a new 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));
+ }
+}