Byte swap values read from the protobuf raw data stream on big endian

[ellert]

This Pull request:

Changes or fixes:

Byte swap values read from the protobuf raw data stream on big endian

Checklist:

• tested changes locally
• updated the docs (if necessary)

This PR fixes #10146

[phsft-bot]

Starting build on ROOT-debian10-i386/cxx14, ROOT-performance-centos8-multicore/default, ROOT-ubuntu16/nortcxxmod, ROOT-ubuntu2004/soversion, mac1015/python3, mac11/cxx17, windows10/cxx14
How to customize builds

[phsft-bot]

Build failed on windows10/cxx14.
Running on null:C:\build\workspace\root-pullrequests-build
See console output.

Errors:

• [2022-04-04T09:07:35.337Z] CMake Error at C:/build/workspace/root-pullrequests-build/rootspi/jenkins/root-build.cmake:1083 (message):

[phsft-bot]

Build failed on ROOT-performance-centos8-multicore/default.
Running on olbdw-01.cern.ch:/data/sftnight/workspace/root-pullrequests-build
See console output.

Failing tests:

• projectroot.roottest.root.multicore.roottest_root_multicore_exectstformula

[phsft-bot]

Starting build on ROOT-debian10-i386/soversion, ROOT-performance-centos8-multicore/cxx17, ROOT-ubuntu18.04/nortcxxmod, ROOT-ubuntu2004/python3, mac12/noimt, mac11/cxx14, windows10/cxx14
How to customize builds

[ellert]

Rebased and updated.

[phsft-bot]

Starting build on ROOT-debian10-i386/soversion, ROOT-performance-centos8-multicore/cxx17, ROOT-ubuntu18.04/nortcxxmod, ROOT-ubuntu2004/python3, mac12/noimt, mac11/cxx14, windows10/cxx14
How to customize builds

[phsft-bot]

Starting build on ROOT-debian10-i386/soversion, ROOT-performance-centos8-multicore/cxx17, ROOT-ubuntu18.04/nortcxxmod, ROOT-ubuntu2004/python3, mac12/noimt, mac11/cxx14, windows10/cxx14
How to customize builds

[ellert]

Now passes all the tests.

[andriish]

Hi @lmoneta,

could you, please, have a look? The PR makes a lot of sense.

Best regards,

Andrii

[guitargeek]

Great! Thanks for the fix!

I will just rebase the PR on master to trigger the new CI tests before merging.