Christian Göttsche 2eaea70111 Overhaul valid_field() ...

e5905c4b ("Added control character check") introduced checking for
control characters but had the logic inverted, so it rejects all
characters that are not control ones.

Cast the character to `unsigned char` before passing to the character
checking functions to avoid UB.

Use strpbrk(3) for the illegal character test and return early.

2023-03-31 09:53:40 -05:00

2.1 KiB

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