bfsub \- extract a slice of a bit array.

.nf

.B "#include <bitfield.h>

.sp

.BI "struct bitfield *bfsub(const struct bitfield *"input ", const unsigned int "start ", const unsigned int "end ");

.fi

A bit array is represented by a "struct bitfield". It has two elements: an array of unsigned long integers \fIfield\fR and an unsigned integer \fIsize\fR.

.sp

The \fBbfsub()\fR function takes a pointer to bitfield \fIinput\fR, the number of the \fIstart\fR bit and \fIend\fR bit, and creates a new bitfield that contains bits between \fIstart\fR (included) bit and \fIend\fR(not included) bit from the \fIinput\fR bitfield. The function returns a pointer to the new bitfield or NULL on failure.

.sp

For the full list of bitfield functions and their descriptions, see manual page for

.BR bitfield (3).

Vitalie CIUBOTARU