Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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78 lines
2.2 KiB
78 lines
2.2 KiB
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# μpb: small, fast C protos |
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μpb (often written 'upb') is a small |
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[protobuf](https://github.com/protocolbuffers/protobuf) implementation written |
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in C. |
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upb is the core runtime for protobuf languages extensions in |
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[Ruby](https://github.com/protocolbuffers/protobuf/tree/master/ruby), |
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[PHP](https://github.com/protocolbuffers/protobuf/tree/master/php), and (soon) |
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Python. |
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While upb offers a C API, the C API & ABI **are not stable**. For this reason, |
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upb is not generally offered as a C library for direct consumption, and there |
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are no releases. |
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## Features |
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upb has comparable speed to protobuf C++, but is an order of magnitude smaller |
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in code size. |
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Like the main protobuf implementation in C++, it supports: |
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- a generated API (in C) |
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- reflection |
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- binary & JSON wire formats |
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- text format serialization |
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- all standard features of protobufs (oneofs, maps, unknown fields, extensions, |
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etc.) |
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- full conformance with the protobuf conformance tests |
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upb also supports some features that C++ does not: |
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- **optional reflection:** generated messages are agnostic to whether |
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reflection will be linked in or not. |
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- **no global state:** no pre-main registration or other global state. |
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- **fast reflection-based parsing:** messages loaded at runtime parse |
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just as fast as compiled-in messages. |
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However there are a few features it does not support: |
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- text format parsing |
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- deep descriptor verification: upb's descriptor validation is not as exhaustive |
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as `protoc`. |
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## Install |
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For Ruby, use [RubyGems](https://rubygems.org/gems/google-protobuf): |
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``` |
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$ gem install google-protobuf |
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``` |
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For PHP, use [PECL](https://pecl.php.net/package/protobuf): |
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``` |
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$ sudo pecl install protobuf |
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``` |
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Alternatively, you can build and install upb using |
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[vcpkg](https://github.com/microsoft/vcpkg/) dependency manager: |
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git clone https://github.com/Microsoft/vcpkg.git |
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cd vcpkg |
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./bootstrap-vcpkg.sh |
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./vcpkg integrate install |
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./vcpkg install upb |
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The upb port in vcpkg is kept up to date by microsoft team members and community |
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contributors. |
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If the version is out of date, please |
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[create an issue or pull request](https://github.com/Microsoft/vcpkg) on the |
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vcpkg repository. |
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## Contributing |
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Please see [CONTRIBUTING.md](CONTRIBUTING.md).
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