Protocol Buffers - Google's data interchange format (grpc依赖) https://developers.google.com/protocol-buffers/
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Protobuf Team Bot c49b0ace36 Auto-generate files after cl/621354397 8 months ago
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base Increased the size of the error message buffer by 4x, to 511 bytes. 11 months ago
cmake Auto-generate files after cl/621354397 8 months ago
conformance Fixed non-conformance in upb JSON enum decoding when ignoring unknown enum values. 12 months ago
hash Added missing package() declarations. 11 months ago
io upb: delete the aliases for upb:hash, upb:lex, upb:reflection_internal 12 months ago
json Add basic upb cmake support. 9 months ago
lex Added missing package() declarations. 11 months ago
mem Add Arena tracing handlers. 9 months ago
message upb: make upb_Array_Reserve() a public function 9 months ago
mini_descriptor upb: clean up open vs closed enums in the Dart gencode 9 months ago
mini_table Add basic upb cmake support. 9 months ago
port Implement edition 2023 support in all Ruby runtimes. 9 months ago
reflection Auto-generate files after cl/621354397 8 months ago
test Add basic upb cmake support. 9 months ago
text upb: fix textformat encoder to print group name instead of field name 9 months ago
util Fix toproto behavior for groups and required under editions 9 months ago
wire upb:decode initialize int inside loop for upb_DecodeLongVarintReturn 8 months ago
BUILD Internal change 9 months ago
README.md Clean up a few stray files that ended up in the wrong place 1 year ago
generated_code_support.h upb: tighten up and lock down upb/wire/ 12 months ago

README.md

μpb: small, fast C protos

μpb (often written 'upb') is a small protobuf implementation written in C.

upb is the core runtime for protobuf languages extensions in Ruby, PHP, and Python.

While upb offers a C API, the C API & ABI are not stable. For this reason, upb is not generally offered as a C library for direct consumption, and there are no releases.

Features

upb has comparable speed to protobuf C++, but is an order of magnitude smaller in code size.

Like the main protobuf implementation in C++, it supports:

  • a generated API (in C)
  • reflection
  • binary & JSON wire formats
  • text format serialization
  • all standard features of protobufs (oneofs, maps, unknown fields, extensions, etc.)
  • full conformance with the protobuf conformance tests

upb also supports some features that C++ does not:

  • optional reflection: generated messages are agnostic to whether reflection will be linked in or not.
  • no global state: no pre-main registration or other global state.
  • fast reflection-based parsing: messages loaded at runtime parse just as fast as compiled-in messages.

However there are a few features it does not support:

  • text format parsing
  • deep descriptor verification: upb's descriptor validation is not as exhaustive as protoc.

Install

For Ruby, use RubyGems:

$ gem install google-protobuf

For PHP, use PECL:

$ sudo pecl install protobuf

For Python, use PyPI:

$ sudo pip install protobuf

Alternatively, you can build and install upb using vcpkg dependency manager:

git clone https://github.com/Microsoft/vcpkg.git
cd vcpkg
./bootstrap-vcpkg.sh
./vcpkg integrate install
./vcpkg install upb

The upb port in vcpkg is kept up to date by microsoft team members and community contributors.

If the version is out of date, please create an issue or pull request on the vcpkg repository.

Contributing

Please see CONTRIBUTING.md.