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39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
// Copyright 2020 Google LLC
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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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// https://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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#ifndef PLATFORM_BASE_BYTE_UTILS_H_
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#define PLATFORM_BASE_BYTE_UTILS_H_
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#include "platform/base/byte_array.h"
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namespace location {
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namespace nearby {
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class ByteUtils {
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public:
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static std::string ToFourDigitString(ByteArray& bytes);
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private:
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// The biggest prime number under 10000, used as a mod base to trim integers
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// into 4 digits.
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static constexpr int kHashBasePrime = 9973;
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// The hash multiplier.
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static constexpr int kHashBaseMultiplier = 31;
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};
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} // namespace nearby
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} // namespace location
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#endif // PLATFORM_BASE_BYTE_UTILS_H_
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