internal/encoding/text: format using 32 bitsize when encoding float32

When encoding/textpb marshals out float32 values, it was previously
formatting it as float64 bitsize since both float types are stored as
float64 and internal/encoding/text only has one Float type.  A
consequence of this is that the output may display a different value
than expected, e.g.  1.02 becomes 1.0199999809265137.

This CL splits Float type into Float32 and Float64 to keep track of
which bitsize to use when formatting.  Values of both types are still
stored as float64 to keep the logic simple.

Decoding will always use Float64, but users can ask for a float32 value
from it.

Change-Id: Iea5b14b283fec2236a0c3946fac34d4d79b95274
Reviewed-on: https://go-review.googlesource.com/c/158497
Reviewed-by: Damien Neil <dneil@google.com>
7 files changed
tree: 5fe3e5023c506aa82a9b4dc21942192d6937541f
  1. cmd/
  2. encoding/
  3. internal/
  4. proto/
  5. protogen/
  6. reflect/
  7. runtime/
  8. types/
  9. .gitignore
  10. .travis.yml
  11. AUTHORS
  12. CONTRIBUTING.md
  13. CONTRIBUTORS
  14. go.mod
  15. go.sum
  16. LICENSE
  17. PATENTS
  18. README.md
  19. regenerate.bash
  20. test.bash
README.md

Next Generation Go Protocol Buffers

WARNING: This repository is in active development. There are no guarantees about API stability. Breaking changes will occur until a stable release is made and announced.

This repository is for the development of the next major Go implementation of protocol buffers. This library makes breaking API changes relative to the existing Go protobuf library. Of particular note, this API aims to make protobuf reflection a first-class feature of the API and implements the protobuf ecosystem in terms of reflection.

Design Documents

List of relevant design documents:

Contributing

We appreciate community contributions. See CONTRIBUTING.md.

Reporting Issues

Issues regarding the new API can be filed at github.com/golang/protobuf. Please use a APIv2: prefix in the title to make it clear that the issue is regarding the new API work.