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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <pkg/rg.h>
# RG_INDICES -- Return the indices in the ranges.
procedure rg_indices (rg, indices, npts, type)
pointer rg # Ranges
pointer indices # Indices
int npts # Number of indices
int type # Data type of points
int i, j, k, step
begin
# Error check the range pointer.
if (rg == NULL)
call error (0, "Range descriptor undefined")
# Determine the number of range points.
indices = NULL
npts = 0
if (RG_NRGS (rg) == 0)
return
do i = 1, RG_NRGS(rg) {
if (RG_X1(rg, i) > RG_X2(rg, i))
npts = npts + RG_X1(rg, i) - RG_X2(rg, i) + 1
else
npts = npts + RG_X2(rg, i) - RG_X1(rg, i) + 1
}
# Allocate the range points array.
call malloc (indices, npts, type)
# Set the range points.
k = indices
do i = 1, RG_NRGS(rg) {
if (RG_X1(rg, i) > RG_X2(rg, i))
step = -1
else
step = 1
switch (type) {
case TY_SHORT:
do j = RG_X1(rg, i), RG_X2(rg, i), step {
Mems[k] = j
k = k + 1
}
case TY_INT:
do j = RG_X1(rg, i), RG_X2(rg, i), step {
Memi[k] = j
k = k + 1
}
case TY_LONG:
do j = RG_X1(rg, i), RG_X2(rg, i), step {
Meml[k] = j
k = k + 1
}
case TY_REAL:
do j = RG_X1(rg, i), RG_X2(rg, i), step {
Memr[k] = j
k = k + 1
}
case TY_DOUBLE:
do j = RG_X1(rg, i), RG_X2(rg, i), step {
Memd[k] = j
k = k + 1
}
default:
call error (0, "rg_indices: Datatype not available")
}
}
return
end
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