Correct return type of strlen function

[Damien-Chen]

I am confused about the return type of strlen() function.
In general, strlen() returns the length of the input string, which is always non‑negative.
Switching the return type to size_t is more accurately.

[visitorckw]

Thanks for the patch!
Just a couple of suggestions: the subject line of the commit message shouldn't end with a period. Also, instead of changing the return type to uint32_t, it might be more appropriate to use size_t. While Linmo currently only supports RV32 systems, using size_t makes the code more portable and could matter if we support RV64 in the future.

[Damien-Chen]

Hi @visitorckw,
Thanks for your feedback, I have updated new patch and squashed it into single one commit.
If there is anything need to improve, please let me know.

[visitorckw]

Hi @visitorckw, Thanks for your feedback, I have updated new patch and squashed it into single one commit. If there is anything need to improve, please let me know.

Thanks for the update. Next time, no need to leave a comment after pushing. GitHub will automatically notify relevant people when you push to the branch.

[visitorckw]

LGTM.