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Moved structures from group data that could be re-used in scenes in a…
… comon location: PersistentData.h
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/* | ||
* | ||
* Copyright (c) 2022 Project CHIP Authors | ||
* | ||
* 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. | ||
*/ | ||
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/** | ||
* @file | ||
* Contains a class handling creation of linked list of stored persistent data. | ||
*/ | ||
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#include <lib/core/DataModelTypes.h> | ||
#include <lib/support/PersistentData.h> | ||
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namespace chip { | ||
namespace CommonPersistentData { | ||
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constexpr uint8_t kdefaultUndefinedEntry = 0; | ||
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/// @brief Generic class to implement storage of a list persistently | ||
/// @tparam EntryType : Type of entry depends on the stored data | ||
/// @tparam kMaxSerializedSize : inherited from PersistentData class | ||
template <typename EntryType, size_t kMaxSerializedSize> | ||
struct StoredDataList : public PersistentData<kMaxSerializedSize> | ||
{ | ||
static constexpr TLV::Tag TagFirstEntry() { return TLV::ContextTag(1); } | ||
static constexpr TLV::Tag TagEntryCount() { return TLV::ContextTag(2); } | ||
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EntryType first_entry = kdefaultUndefinedEntry; | ||
uint16_t entry_count = 0; | ||
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StoredDataList() = default; | ||
StoredDataList(EntryType first) : first_entry(first), entry_count(1) {} | ||
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CHIP_ERROR Serialize(TLV::TLVWriter & writer) const override | ||
{ | ||
TLV::TLVType container; | ||
ReturnErrorOnFailure(writer.StartContainer(TLV::AnonymousTag(), TLV::kTLVType_Structure, container)); | ||
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ReturnErrorOnFailure(writer.Put(TagFirstEntry(), static_cast<uint16_t>(first_entry))); | ||
ReturnErrorOnFailure(writer.Put(TagEntryCount(), static_cast<uint16_t>(entry_count))); | ||
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return writer.EndContainer(container); | ||
} | ||
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CHIP_ERROR Deserialize(TLV::TLVReader & reader) override | ||
{ | ||
ReturnErrorOnFailure(reader.Next(TLV::AnonymousTag())); | ||
VerifyOrReturnError(TLV::kTLVType_Structure == reader.GetType(), CHIP_ERROR_INTERNAL); | ||
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TLV::TLVType container; | ||
ReturnErrorOnFailure(reader.EnterContainer(container)); | ||
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// first_entry | ||
ReturnErrorOnFailure(reader.Next(TagFirstEntry())); | ||
ReturnErrorOnFailure(reader.Get(first_entry)); | ||
// entry_count | ||
ReturnErrorOnFailure(reader.Next(TagEntryCount())); | ||
ReturnErrorOnFailure(reader.Get(entry_count)); | ||
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return reader.ExitContainer(container); | ||
} | ||
}; | ||
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constexpr size_t kPersistentFabricBufferMax = 32; | ||
struct FabricList : StoredDataList<FabricIndex, kPersistentFabricBufferMax> | ||
{ | ||
CHIP_ERROR UpdateKey(StorageKeyName & key) override | ||
{ | ||
key = DefaultStorageKeyAllocator::FabricList(); | ||
return CHIP_NO_ERROR; | ||
} | ||
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void Clear() override | ||
{ | ||
first_entry = kUndefinedFabricIndex; | ||
entry_count = 0; | ||
} | ||
}; | ||
} // namespace CommonPersistentData | ||
} // namespace chip |
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