Line data    Source code

       1              : /*
       2              :  *    Copyright (c) 2025 Project CHIP Authors
       3              :  *    All rights reserved.
       4              :  *
       5              :  *    Licensed under the Apache License, Version 2.0 (the "License");
       6              :  *    you may not use this file except in compliance with the License.
       7              :  *    You may obtain a copy of the License at
       8              :  *
       9              :  *        http://www.apache.org/licenses/LICENSE-2.0
      10              :  *
      11              :  *    Unless required by applicable law or agreed to in writing, software
      12              :  *    distributed under the License is distributed on an "AS IS" BASIS,
      13              :  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      14              :  *    See the License for the specific language governing permissions and
      15              :  *    limitations under the License.
      16              :  */
      17              : #include <app/server-cluster/AttributeListBuilder.h>
      18              : 
      19              : #include <app/server-cluster/DefaultServerCluster.h>
      20              : 
      21              : namespace chip {
      22              : namespace app {
      23              : 
      24           11 : CHIP_ERROR AttributeListBuilder::Append(Span<const DataModel::AttributeEntry> mandatoryAttributes,
      25              :                                         Span<const OptionalAttributeEntry> optionalAttributes)
      26              : {
      27              :     // determine how much data to append. This should only be called if generally we have something to append
      28           11 :     size_t append_size = mandatoryAttributes.size();
      29           38 :     for (const auto & entry : optionalAttributes)
      30              :     {
      31           27 :         if (entry.enabled)
      32              :         {
      33           13 :             append_size++;
      34              :         }
      35              :     }
      36              : 
      37           11 :     if (append_size > 0)
      38              :     {
      39              :         // NOTE: ReferenceExisting will APPEND data (and use heap) when some data already
      40              :         //       exists in the builder. This is why we ensure AppendCapacity for everything
      41              :         //       so that we do not perform extra allocations.
      42            9 :         ReturnErrorOnFailure(mBuilder.EnsureAppendCapacity(append_size + DefaultServerCluster::GlobalAttributes().size()));
      43            9 :         ReturnErrorOnFailure(mBuilder.ReferenceExisting(mandatoryAttributes));
      44              : 
      45           32 :         for (const auto & entry : optionalAttributes)
      46              :         {
      47           23 :             if (entry.enabled)
      48              :             {
      49           13 :                 ReturnErrorOnFailure(mBuilder.Append(entry.metadata));
      50              :             }
      51              :         }
      52              :     }
      53              : 
      54              :     // NOTE: ReferenceExisting will APPEND data (and use heap) when some data already
      55              :     //       exists in the builder.
      56           11 :     return mBuilder.ReferenceExisting(DefaultServerCluster::GlobalAttributes());
      57              : }
      58              : 
      59              : } // namespace app
      60              : } // namespace chip