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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <pkg/rg.h>
# RG_PACK -- Pack input data to include only points in the ranges.
#
# The output array must be large enough to contain the desired points.
# If the ranges are merged then the input and output arrays may be the same.
procedure rg_pack$t (rg, a, b)
pointer rg # Ranges
PIXEL a[ARB] # Input array
PIXEL b[ARB] # Output array
int i, j, k, n
begin
# Error check the range pointer.
if (rg == NULL)
call error (0, "Range pointer undefined")
j = 0
do i = 1, RG_NRGS(rg) {
if (RG_X1(rg, i) > RG_X2(rg, i)) {
do k = RG_X1(rg, i), RG_X2(rg, i), -1 {
j = j + 1
b[j] = a[k]
}
} else {
n = RG_X2(rg, i) - RG_X1(rg, i) + 1
call amov$t (a[RG_X1(rg, i)], b[j + 1], n)
j = j + n
}
}
end
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