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ISRUNE(3)
ISRUNE(3) FreeBSD Library Functions Manual ISRUNE(3)

NAME

isrunevalid 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.
March 30, 2004 FreeBSD