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.

SEE ALSO
     ctype(3), isascii(3), iswrune(3), ascii(7)

HISTORY
     The isrune() function appeared in 4.4BSD.

FreeBSD 13.1-RELEASE-p6         March 30, 2004         FreeBSD 13.1-RELEASE-p6