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flutter/third_party/protobuf/12fffeb9c320f841bafd5080fd2810403f1a393d
commit
12fffeb9c320f841bafd5080fd2810403f1a393d
[log]
author
Joshua Haberman <haberman@google.com>
Tue May 17 14:00:49 2022 -0700
committer
Copybara-Service <copybara-worker@google.com>
Tue May 17 14:01:22 2022 -0700
tree
b3d5d81888b4dd172ccca0c6d600b3c6098c118a
parent
a30bb1b842a8389f280f0eeb36fd5eae51bcbe4f [diff]
Rename CMessage -> Message, to make the change in https://github.com/protocolbuffers/upb/pull/617 work as intended.

The previous change did not have the desired effect, because the generated code uses the class named "Message" instead of "CMessage."

There was no real need to use the class "CMessage" instead of "Message."  The new name is simpler and will make the previous change work.

PiperOrigin-RevId: 449309343
10 files changed
tree: b3d5d81888b4dd172ccca0c6d600b3c6098c118a
  1. .bazelci/
  2. .github/
  3. bazel/
  4. benchmarks/
  5. cmake/
  6. docs/
  7. python/
  8. third_party/
  9. upb/
  10. upbc/
  11. .bazelignore
  12. .bazelrc
  13. .clang-format
  14. .gitignore
  15. BUILD
  16. CONTRIBUTING.md
  17. DESIGN.md
  18. LICENSE
  19. README.md
  20. WORKSPACE
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 (soon) 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

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.