Function scratchstack_wrapper_aws_c_common::aws_isxdigit

pub unsafe extern "C" fn aws_isxdigit(ch: u8) -> bool

Like isxdigit(). Returns true if ch has the value of ASCII/UTF-8: ‘0’-‘9’, ‘a’-‘f’, or ‘A’-‘F’.

Note: C’s built-in isxdigit() is also supposed to ignore the C locale, but cppreference.com claims “some implementations (e.g. Microsoft in 1252 codepage) may classify additional single-byte characters as digits”