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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
# ALUT -- Map an array using table lookup. Note that an input value of zero
# indexes the first element of the lookup table. No bounds checking is
# performed.
procedure alut$t (a, b, npix, lut)
$if (datatype == rd)
int a[ARB] # input array of indices
$else
PIXEL a[ARB]
$endif
PIXEL b[ARB] # output data array
PIXEL lut[ARB] # lookup table
int npix, i
begin
do i = 1, npix
b[i] = lut[a[i]+1]
end
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