.TH ZBSET 3 libzahl
.SH NAME
zbset - Set, clear, or flip a bit in a big integer
.SH SYNOPSIS
.nf
#include <zahl.h>

void zbset(z_t \fIa\fP, z_t \fIb\fP, size_t \fIindex\fP, int \fIset\fP);
.fi
.SH DESCRIPTION
.B zbset
either sets, clears, or flips the bit with the selected
.I index
in
.IR b ,
and stores the result in
.IR a .
.P
The bit is set if
.IR "(set>0)" ,
clear if
.IR "(set==0)" ,
and flipped if
.IR "(set<0)" .
.P
It is safe to call
.B zbset
with non-unique parameters.
.SH SEE ALSO
.BR zbtest (3),
.BR zand (3),
.BR zor (3),
.BR zxor (3),
.BR znot (3),
.BR zlsh (3),
.BR zrsh (3),
.BR zsplit (3),
.BR zlsb (3),
.BR zbits (3)