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TOASCII(3) Library Functions Manual TOASCII(3)

toascii
convert a byte to 7-bit ASCII

#include <ctype.h>
int
toascii(int c);

The toascii() function strips all but the low 7 bits from a letter, including parity or other marker bits.

The toascii() function always returns a valid ASCII character.

isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3), isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isupper(3), isxdigit(3), stdio(3), tolower(3), toupper(3), ascii(7)
June 5, 2013 OpenBSD-current