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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
# ABLTK -- Vector boolean less than constant. C[i], type INT, is set to 1 if
# A[i] is less than B, else C[i] is set to zero.
procedure abltkr (a, b, c, npix)
real a[ARB]
real b
int c[ARB]
int npix
int i
begin
# The case b==0 is perhaps worth optimizing. On many machines this
# will save a memory fetch.
if (b == 0.0) {
do i = 1, npix
if (a[i] < 0)
c[i] = 1
else
c[i] = 0
} else {
do i = 1, npix
if (a[i] < b)
c[i] = 1
else
c[i] = 0
}
end
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