53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "nvs_types.hpp"
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#if defined(ESP_PLATFORM)
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#include <rom/crc.h>
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#else
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#include "crc.h"
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#endif
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namespace nvs
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{
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uint32_t Item::calculateCrc32() const
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{
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uint32_t result = 0xffffffff;
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const uint8_t* p = reinterpret_cast<const uint8_t*>(this);
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result = crc32_le(result, p + offsetof(Item, nsIndex),
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offsetof(Item, crc32) - offsetof(Item, nsIndex));
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result = crc32_le(result, p + offsetof(Item, key), sizeof(key));
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result = crc32_le(result, p + offsetof(Item, data), sizeof(data));
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return result;
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}
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uint32_t Item::calculateCrc32WithoutValue() const
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{
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uint32_t result = 0xffffffff;
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const uint8_t* p = reinterpret_cast<const uint8_t*>(this);
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result = crc32_le(result, p + offsetof(Item, nsIndex),
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offsetof(Item, datatype) - offsetof(Item, nsIndex));
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result = crc32_le(result, p + offsetof(Item, key), sizeof(key));
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return result;
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}
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uint32_t Item::calculateCrc32(const uint8_t* data, size_t size)
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{
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uint32_t result = 0xffffffff;
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result = crc32_le(result, data, size);
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return result;
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}
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} // namespace nvs
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