iscntrl(3) - NetBSD Manual Pages

ISCNTRL(3)              NetBSD Library Functions Manual             ISCNTRL(3)


NAME
iscntrl - control character test
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <ctype.h> int iscntrl(int c);
DESCRIPTION
The iscntrl() function tests for any control character.
RETURN VALUES
The iscntrl() macro returns zero if the character tests false and returns non-zero if the character tests true.
SEE ALSO
isalnum(3), isalpha(3), isascii(3), isblank(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 iscntrl() function conforms to ANSI X3.159-1989 (``ANSI C'').
CAVEATS
The argument to iscntrl() must be EOF or representable as an unsigned char; otherwise, the result is undefined. NetBSD 2.0 June 29, 1991 NetBSD 2.0

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