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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef avro_Encoding_hh__
#define avro_Encoding_hh__
#include <array>
#include <cstddef>
#include <cstdint>
#include "Config.hh"
/// \file
/// Functions for encoding and decoding integers with zigzag compression
namespace avro {
AVRO_DECL constexpr uint64_t encodeZigzag64(int64_t input) noexcept {
// cppcheck-suppress shiftTooManyBitsSigned
return ((input << 1) ^ (input >> 63));
}
AVRO_DECL constexpr int64_t decodeZigzag64(uint64_t input) noexcept {
return static_cast<int64_t>(((input >> 1) ^ -(static_cast<int64_t>(input) & 1)));
}
AVRO_DECL constexpr uint32_t encodeZigzag32(int32_t input) noexcept {
// cppcheck-suppress shiftTooManyBitsSigned
return ((input << 1) ^ (input >> 31));
}
AVRO_DECL constexpr int32_t decodeZigzag32(uint32_t input) noexcept {
return static_cast<int32_t>(((input >> 1) ^ -(static_cast<int64_t>(input) & 1)));
}
AVRO_DECL size_t encodeInt32(int32_t input, std::array<uint8_t, 5> &output) noexcept;
AVRO_DECL size_t encodeInt64(int64_t input, std::array<uint8_t, 10> &output) noexcept;
} // namespace avro
#endif
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