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@@ -1,16 +1,8 @@
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-// Copyright 2017-2019 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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-
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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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+/*
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+ * SPDX-FileCopyrightText: 2017-2021 Espressif Systems (Shanghai) CO LTD
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+ *
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+ * SPDX-License-Identifier: Apache-2.0
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+ */
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#include <string.h>
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#include <errno.h>
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lly