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#ifndef ONES
#define ONES ((_BS_word)(~0L))
#endif
register int nwords;
register _BS_word mask;
if (offset == 0)
;
else if (offset + length >= _BS_BITS_PER_WORD)
{
mask = ONES _BS_RIGHT offset;
DOIT(*ptr++, mask);
length -= _BS_BITS_PER_WORD - offset;
}
else
{
mask = (ONES _BS_RIGHT (_BS_BITS_PER_WORD - length))
_BS_LEFT (_BS_BITS_PER_WORD - length - offset);
DOIT(*ptr, mask);
goto done;
}
nwords = _BS_INDEX(length);
while (--nwords >= 0)
{
DOIT(*ptr++, ONES);
}
length = _BS_POS (length);
if (length)
{
mask = ONES _BS_LEFT (_BS_BITS_PER_WORD - length);
DOIT(*ptr, mask);
}
done: ;
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