[libc-commits] [libc] [libc][NFC] Adjust use of off_t internally (PR #68269)

[Guillaume Chatelet via libc-commits]

https://github.com/gchatelet requested changes to this pull request.

I'd like to see proof that the split is correct, since it's going to come up again I think a function + tests would get us covered.

https://github.com/llvm/llvm-project/pull/68269