44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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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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#include "lang_id/common/math/checksum.h"
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// Though we use the same zlib header on all platforms, the implementation used
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// is from NDK on android and from third_party/zlib on iOS/linux. See BUILD
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// rule.
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#include <zlib.h>
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namespace libtextclassifier3 {
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namespace mobile {
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// static
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uint32 Crc32::GetInitialCrc32() {
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static const uint32 kCrcInitZero = crc32(0L, nullptr, 0);
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return kCrcInitZero;
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}
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void Crc32::Update(const char *str, int len) {
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if (str == nullptr || len == 0) {
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return;
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}
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current_ = crc32(current_,
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reinterpret_cast<const unsigned char *>(str),
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len);
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}
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} // namespace mobile
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} // namespace nlp_saft
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