ISRUNE(3) |
FreeBSD Library Functions Manual |
ISRUNE(3) |
NAME
isrune —
valid character test
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include < ctype.h>
int
isrune( int c);
DESCRIPTION
The
isrune() function tests for any character that is valid in the current character set. In the ASCII character set, this is equivalent to
isascii().
RETURN VALUES
The
isrune() function returns zero if the character tests false and returns non-zero if the character tests true.
HISTORY
The
isrune() function appeared in
4.4BSD.