JSON_Status json_validate()

in parson.c [2074:2135]
61 lines of code
20 McCabe index (conditional complexity)

JSON_Status json_validate(const JSON_Value *schema : itype(_Ptr<const JSON_Value>), const JSON_Value *value : itype(_Ptr<const JSON_Value>)) {
    _Ptr<JSON_Value> temp_schema_value = NULL;
    _Ptr<JSON_Value> temp_value = NULL;
    _Ptr<JSON_Array> schema_array = NULL;
    _Ptr<JSON_Array> value_array = NULL;
    _Ptr<JSON_Object> schema_object = NULL;
    _Ptr<JSON_Object> value_object = NULL;
    JSON_Value_Type schema_type = JSONError, value_type = JSONError;
    _Nt_array_ptr<const char> key = NULL;
    size_t i = 0, count = 0;
    if (schema == NULL || value == NULL) {
        return JSONFailure;
    }
    schema_type = json_value_get_type(schema);
    value_type = json_value_get_type(value);
    if (schema_type != value_type && schema_type != JSONNull) { /* null represents all values */
        return JSONFailure;
    }
    switch (schema_type) {
        case JSONArray:
            schema_array = json_value_get_array(schema);
            value_array = json_value_get_array(value);
            count = json_array_get_count(schema_array);
            if (count == 0) {
                return JSONSuccess; /* Empty array allows all types */
            }
            /* Get first value from array, rest is ignored */
            temp_schema_value = json_array_get_value(schema_array, 0);
            for (i = 0; i < json_array_get_count(value_array); i++) {
                temp_value = json_array_get_value(value_array, i);
                if (json_validate(temp_schema_value, temp_value) == JSONFailure) {
                    return JSONFailure;
                }
            }
            return JSONSuccess;
        case JSONObject:
            schema_object = json_value_get_object(schema);
            value_object = json_value_get_object(value);
            count = json_object_get_count(schema_object);
            if (count == 0) {
                return JSONSuccess; /* Empty object allows all objects */
            } else if (json_object_get_count(value_object) < count) {
                return JSONFailure; /* Tested object mustn't have less name-value pairs than schema */
            }
            for (i = 0; i < count; i++) {
                key = json_object_get_name(schema_object, i);
                temp_schema_value = json_object_get_value(schema_object, key);
                temp_value = json_object_get_value(value_object, key);
                if (temp_value == NULL) {
                    return JSONFailure;
                }
                if (json_validate(temp_schema_value, temp_value) == JSONFailure) {
                    return JSONFailure;
                }
            }
            return JSONSuccess;
        case JSONString: case JSONNumber: case JSONBoolean: case JSONNull:
            return JSONSuccess; /* equality already tested before switch */
        case JSONError: default:
            return JSONFailure;
    }
}