NAME
isascii —
test for ASCII
character
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <ctype.h>
int
isascii(
int
c);
DESCRIPTION
The
isascii() function tests for an ASCII character, which is
any character with a value in the range from 0 to 127, inclusive.
The
isascii() is defined on all integer values.
SEE ALSO
ctype(3),
isalnum(3),
isalpha(3),
isblank(3),
iscntrl(3),
isdigit(3),
isgraph(3),
islower(3),
isprint(3),
ispunct(3),
isspace(3),
isupper(3),
isxdigit(3),
stdio(3),
toascii(3),
tolower(3),
toupper(3),
ascii(7)
STANDARDS
The
isascii() 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
isascii() cannot
be used portably in a localized application.