.TH LIBUTF8_IS_INVALID 3 LIBUTF8
.SH NAME
libutf8_is_invalid - Test whether a codepoint is invalid Unicode

.SH SYNOPSIS
.nf
#include <libutf8.h>

int \fBlibutf8_is_invalid\fP(uint_least32_t \fIcodepoint\fP);
.fi
.PP
Link with
.IR -lutf8 .

.SH DESCRIPTION
The
.BR libutf8_is_invalid ()
function tests whether a codepoint is invalid Unicode.

.SH RETURN VALUE
The
.BR libutf8_is_invalid ()
function returns 1 if the predicate is true, and 0 otherwise.

.SH ERRORS
The
.BR libutf8_is_invalid ()
function cannot fail.

.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.PP
.TS
allbox;
lb lb lb lb
l l l l.
Interface	Thread safety	Async-signal safety	Async-cancel safety
T{
.BR libutf8_is_invalid ()
T}	MT-Safe	AS-Safe	AC-Safe
.TE
.sp

.SH SEE ALSO
.BR libutf8 (7)
.BR libutf8_is_valid (3),
.BR libutf8_is_noncharacter (3),
.BR libutf8_is_surrogate (3),
.BR LIBUTF8_ULTIMATE_CODEPOINT (3),
.BR libutf8_is_continuation (3)