Actually add the file this time

Author: cecille

src/controller/python/JsonTlvSupport.cpp

@@ -0,0 +1,46 @@
+/*
+ *
+ *    Copyright (c) 2024 Project CHIP Authors
+ *    All rights reserved.
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
+/**
+ *    @file
+ *      Support for JsonTlv.
+ *
+ */
+
+#include <lib/support/jsontlv/JsonToTlv.h>
+#include <string>
+
+using namespace chip;
+
+extern "C" {
+// Returns the number of TLV encoded bytes extracted from the json string
+// Input:
+//    json - JSON string containing the MatterTLVJson style json for one cluster
+//    buf - output buffer
+//    size - output buffer size
+// Returns:
+//    Number of TLV bytes encoded. If this fails, 0 will be returned.
+size_t pychip_JsonToTlv(const char* json, uint8_t* buf, size_t size) {
+    MutableByteSpan tlvSpan(buf, size);
+    CHIP_ERROR err = JsonToTlv(json, tlvSpan);
+    if (err != CHIP_NO_ERROR) {
+        return 0;
+    }
+    return tlvSpan.size();
+}
+}  // extern "C"