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Colin Dellow
67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
#ifndef PROTOZERO_TYPES_HPP
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#define PROTOZERO_TYPES_HPP
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/*****************************************************************************
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protozero - Minimalistic protocol buffer decoder and encoder in C++.
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This file is from https://github.com/mapbox/protozero where you can find more
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documentation.
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*****************************************************************************/
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/**
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* @file types.hpp
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*
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* @brief Contains the declaration of low-level types used in the pbf format.
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*/
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#include "config.hpp"
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#include <algorithm>
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#include <cstddef>
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#include <cstdint>
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#include <cstring>
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#include <string>
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#include <utility>
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namespace protozero {
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/**
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* The type used for field tags (field numbers).
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*/
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using pbf_tag_type = uint32_t;
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/**
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* The type used to encode type information.
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* See the table on
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* https://developers.google.com/protocol-buffers/docs/encoding
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*/
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enum class pbf_wire_type : uint32_t {
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varint = 0, // int32/64, uint32/64, sint32/64, bool, enum
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fixed64 = 1, // fixed64, sfixed64, double
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length_delimited = 2, // string, bytes, nested messages, packed repeated fields
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fixed32 = 5, // fixed32, sfixed32, float
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unknown = 99 // used for default setting in this library
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};
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/**
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* Get the tag and wire type of the current field in one integer suitable
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* for comparison with a switch statement.
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*
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* See pbf_reader.tag_and_type() for an example how to use this.
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*/
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template <typename T>
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constexpr inline uint32_t tag_and_type(T tag, pbf_wire_type wire_type) noexcept {
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return (static_cast<uint32_t>(static_cast<pbf_tag_type>(tag)) << 3U) | static_cast<uint32_t>(wire_type);
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}
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/**
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* The type used for length values, such as the length of a field.
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*/
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using pbf_length_type = uint32_t;
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} // end namespace protozero
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#endif // PROTOZERO_TYPES_HPP
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