Function encoding_c_mem::encoding_mem_is_char_bidi

#[no_mangle]
pub unsafe extern "C" fn encoding_mem_is_char_bidi(c: char) -> bool

Checks whether a scalar value triggers right-to-left processing.

The check is done on a Unicode block basis without regard to assigned vs. unassigned code points in the block. Hebrew presentation forms in the Alphabetic Presentation Forms block are treated as if they formed a block on their own (i.e. it treated as right-to-left). Additionally, the four RIGHT-TO-LEFT FOO controls in General Punctuation are checked for. Control characters that are technically bidi controls but do not cause right-to-left behavior without the presence of right-to-left characters or right-to-left controls are not checked for. As a special case, U+FEFF is excluded from Arabic Presentation Forms-B.

Undefined behavior

Undefined behavior ensues if c is not a valid Unicode Scalar Value.