SWAB(9F) Kernel Functions for Drivers SWAB(9F)
NAME
swab - swap bytes in 16-bit halfwords
SYNOPSIS
#include <sys/sunddi.h>
void swab(
void *src,
void *dst,
size_t nbytes);
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI).
PARAMETERS
src A pointer to the buffer containing the bytes to be swapped.
dst A pointer to the destination buffer where the swapped bytes
will be written. If
dst is the same as
src the buffer will
be swapped in place.
nbytes Number of bytes to be swapped, rounded down to the nearest
half-word.
DESCRIPTION
The
swab() function copies the bytes in the buffer pointed to by
src to the buffer pointer to by
dst, swapping the order of adjacent bytes
in half-word pairs as the copy proceeds. A total of
nbytes bytes are
copied, rounded down to the nearest half-word.
CONTEXT
The
swab() function can be called from user, interrupt, or kernel
context.
SEE ALSO
Writing Device DriversNOTES
Since
swab() operates byte-by-byte, it can be used on non-aligned
buffers.
January 16, 2006 SWAB(9F)
