json: Fix multidimensional array support
This patch fixes support for encoding and decoding multidimensional arrays
as described by the JSON_OBJ_DESCR_ARRAY_ARRAY() macro.
Currently, the JSON array encoding and decoding functions, arr_encode()
and arr_parse(), expect array elements to be of object or primitive type.
However, arrays may be nested and so an array's elements may also be
arrays.
In order to support nested arrays, two special cases must be considered:
1. The array of objects/arrays sub-descriptor is described by two
`json_obj_descr` structs and so two instead of one `json_obj_descr`
structs must be skipped when iterating over the JSON descriptor to get to
an array's elements.
2. The implicit array item count field has to be considered for the
parent itself and all its child array items when calculating an element's
size.
Fixes #50801
Signed-off-by: Markus Fuchs <markus.fuchs@ch.sauter-bc.com>
1 file changed
