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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
# ABLEK -- Vector boolean less than or equals constant. C[i], type INT,
# is set to 1 if A[i] is less than or equal to B, else C[i] is set to zero.
procedure ablek$t (a, b, c, npix)
PIXEL a[ARB]
PIXEL b
int c[ARB]
int npix
int i
$if (datatype == x)
real abs_b
$endif
begin
# The case b==0 is perhaps worth optimizing. On many machines this
# will save a memory fetch.
if (b == 0$f) {
do i = 1, npix
$if (datatype == x)
if (abs (a[i]) == 0)
$else
if (a[i] <= 0)
$endif
c[i] = 1
else
c[i] = 0
} else {
$if (datatype == x)
abs_b = abs (b)
$endif
do i = 1, npix
$if (datatype == x)
if (abs (a[i]) <= abs_b)
$else
if (a[i] <= b)
$endif
c[i] = 1
else
c[i] = 0
}
end
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