How to Serialize and Deserialize Class with Members of Custom Data Types in C
Introduction
Serialization involves converting an object's state into a format that can be stored and later reconstructed. When dealing with complex data structures like classes with members of custom data types, serialization becomes particularly relevant.
问题
The primary question is twofold:
Response
Solution 1: Implementing the serialize Function
The suggested prototype for the serialize function is:
<code class="cpp">std::vector<uint8_t> serialize(Mango const& Man);</code>
This function accepts a Mango object by reference (Man) and returns a std::vector of bytes that represent the serialized data.
Solution 2: Implementing the deserialize Function
The corresponding deserialize function has the following prototype:
<code class="cpp">Mango deserialize(std::span<uint8_t const> data);</code>
It takes a span of bytes (data) and returns a Mango object constructed from the deserialized data.
Suggested Implementations
Based on the helper functions described below, these suggested implementations offer efficient serialization and deserialization:
<code class="cpp">// Serialization function std::vector<uint8_t> serialize(Mango const& Man) { std::vector<uint8_t> bytes; do_generate(back_inserter(bytes), Man); return bytes; } // Deserialization function Mango deserialize(std::span<uint8_t const> data) { Mango result; auto f = begin(data), l = end(data); if (!do_parse(f, l, result)) throw std::runtime_error("deserialize"); return result; }</code>
Custom Serialization Helpers
These helper functions (implemented in the my_serialization_helpers namespace) provide the core serialization and parsing functionality:
Generators (do_generate Functions):
Parsers (do_parse Functions):
Custom Types Serialization
To serialize custom data types within the Mango class, additional do_generate and do_parse functions are defined for each type:
Example Usage
The provided example demonstrates serialization and deserialization of a Mango object, verifying its integrity through round-tripping and debug output.
Portability and Endianness
Endianness is not inherently accounted for in this implementation. To ensure portability across different hardware architectures, an additional step of normalizing endianness may be required. Libraries like Boost Endian can be utilized for this purpose without requiring library linking.
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