.TH LIBJ2_CTO_J2U 3 LIBJ2
.SH NAME
libj2_cto_j2u \- Count trailing ones

.SH SYNOPSIS
.nf
#include <libj2.h>

unsigned \fBlibj2_cto_j2u\fP(const struct libj2_j2u *\fIa\fP);
.fi
.PP
Link with
.IR -lj2 .

.SH DESCRIPTION
The
.BR libj2_cto_j2u ()
function returns the number of trailing set bits in
.IR a .
.PP
In the case that all bits in
.I a
are set, all of them are counted as trailing.
.PP
.I a
is assumed to be
.RI non- NULL .

.SH RETURN VALUE
The
.BR libj2_cto_j2u ()
function returns the number of set bits that
are less significant than the least significant
cleared bits in
.IR a ,
or the total number of bits in
.I a
if all its bits are set.

.SH ERRORS
The
.BR libj2_cto_j2u ()
function cannot fail.

.SH HISTORY
The
.BR libj2_cto_j2u ()
function was added in version 1.0 of
.BR libj2 .

.SH SEE ALSO
.BR libj2 (7),
.BR libj2_ctz_j2u (3),
.BR libj2_clo_j2u (3),
.BR libj2_co_j2u (3),
.BR libj2_ffs_j2u (3),
.BR libj2_kfs_j2u (3),
.BR libj2_cfs_j2u (3),
.BR libj2_sfc_j2u (3)