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35 lines
1.2 KiB
35 lines
1.2 KiB
4 months ago
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/*
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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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// Utility functions for calculating and verifying checksums.
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#ifndef LIBTEXTCLASSIFIER_UTILS_CHECKSUM_H_
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#define LIBTEXTCLASSIFIER_UTILS_CHECKSUM_H_
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#include <string>
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namespace libtextclassifier3 {
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// Computes and verifies that the last digit of `input` matches the Luhn
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// checksum. Returns false if presented with non-digits, or on whitespace
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// characters if `ignore_whitespace` is false.
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bool VerifyLuhnChecksum(const std::string& input,
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bool ignore_whitespace = true);
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} // namespace libtextclassifier3
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#endif // LIBTEXTCLASSIFIER_UTILS_CHECKSUM_H_
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