toascii
—
convert a byte to 7-bit ASCII
Standard C Library (libc, -lc)
#include <ctype.h>
int
toascii
(int
c);
The toascii
() function returns the argument with all but
the lower 7 bits cleared.
The toascii
() function always returns a valid ASCII
character. The result is a non-negative integer in the range from 0 to 127,
inclusive.
ctype(3),
isalnum(3),
isalpha(3),
isascii(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)
The toascii
() function conforms to
X/Open Portability Guide Issue 4
(“XPG4”) and IEEE Std 1003.1-2001
(“POSIX.1”). The IEEE Std 1003.1-2008
(“POSIX.1”) revision however marked it as obsolete,
noting that toascii
() cannot be used portably in a
localized application.