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Commit 276fe8a6 authored by Henri Chataing's avatar Henri Chataing Committed by Gerrit Code Review
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Merge changes I9a352cd2,I874d9206 

* changes:
  pdl: Add LICENSE, README.md, CONTRIBUTING.md files
  pdl: Add apache header to source files
parents a6cdcde6 e9541564

tools/pdl/CONTRIBUTING.md

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# How to contribute



We'd love to accept your patches and contributions to this project.



## Before you begin



### Sign our Contributor License Agreement



Contributions to this project must be accompanied by a

[Contributor License Agreement](https://cla.developers.google.com/about) (CLA).

You (or your employer) retain the copyright to your contribution; this simply

gives us permission to use and redistribute your contributions as part of the

project.



If you or your current employer have already signed the Google CLA (even if it

was for a different project), you probably don't need to do it again.



Visit <https://cla.developers.google.com/> to see your current agreements or to

sign a new one.



### Review our community guidelines



This project follows

[Google's Open Source Community Guidelines](https://opensource.google/conduct/).



## Contribution process



### Code reviews



All submissions, including submissions by project members, require review. We

use GitHub pull requests for this purpose. Consult

[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more

information on using pull requests.

tools/pdl/LICENSE

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                                 Apache License

                           Version 2.0, January 2004

                        http://www.apache.org/licenses/



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tools/pdl/README.md

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# Packet Description Language (PDL)



PDL is a domain specific language for writing the definition of binary protocol

packets. Parsing and validating packets from raw bytes is tedious and error

prone in any language. PDL generates memory safe and tailored backends for

mulitple target languages:



    - Rust

    - C++

    - Python



## How to use PDL



1. Write the protocol definition

1. `cargo run my-protocol.pdl --output-format rust > my-protocol.rs`



Language specific instructions are provided in another section.



## Supported Features



[Full reference documentation](#doc/reference.md)

- Scalar values

- Enumerators

- Arrays

- Nested packets

- Conditional packet derivation

- Custom field definitions



## Similar projects



* [Kaitai](https://kaitai.io)

* [EMBOSS](https://github.com/kimrutherford/EMBOSS)

* [P4](https://p4.org/p4-spec/docs/P4-16-v1.0.0-spec.html)

tools/pdl/scripts/generate_cxx_backend.py

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#!/usr/bin/env python3



# Copyright 2023 Google LLC

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#     https://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.



import argparse

from dataclasses import dataclass, field

import json

tools/pdl/scripts/generate_cxx_backend_tests.py

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#!/usr/bin/env python3



# Copyright 2023 Google LLC

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#     https://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.



import argparse

from dataclasses import dataclass, field

import json