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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
# XT_LSUM -- Sum lines
#
# A new sum vector is created when the data pointer is null or if the number
# of columns is changed. If the previous sum overlaps the requested sum then
# additions and subtractions are performed on the previous sum to minimize
# the number of arithmetic operations.
procedure xt_lsum (im, col1, col2, line1, line2, data)
pointer im # IMIO pointer
int col1, col2 # Column limits of the sum
int line1, line2 # Line limits
pointer data # Data pointer
int i
int ncols, nlines, nc, nl, c1, c2, l1, l2
pointer j
pointer imgs2r()
begin
ncols = col2 - col1 + 1
nlines = line2 - line1 + 1
if ((data == NULL) || (ncols != nc)) {
call mfree (data, TY_REAL)
call malloc (data, ncols, TY_REAL)
nc = ncols
l1 = 0
l2 = 0
}
if (nlines != nl) {
nl = nlines
l1 = 0
l2 = 0
}
# If only one line then don't bother with summing.
if (nlines == 1) {
if ((line1 != l1) || (col1 != c1) || (col2 != c2)) {
c1 = col1
c2 = col2
l1 = line1
l2 = line2
j = imgs2r (im, c1, c2, l1, l2)
call amovr (Memr[j], Memr[data], nc)
}
return
}
# If the sum limits are outside the last sum limits then form
# the sums from scratch.
if ((line1 > l2) || (line2 < l1) || (col1 != c1) || (col2 != c2)) {
c1 = col1
c2 = col2
l1 = line1
l2 = line2
call aclrr (Memr[data], nc)
do i = l1, l2 {
j = imgs2r (im, c1, c2, i, i)
call aaddr (Memr[data], Memr[j], Memr[data], nc)
}
# If the sum limits overlap then add and subtract to compute the
# new sums from the previous sums. This minimizes the number of
# arithmetic operations in common applications.
} else if (line1 > l1) {
do i = l1, line1 - 1 {
j = imgs2r (im, c1, c2, i, i)
call asubr (Memr[data], Memr[j], Memr[data], nc)
}
do i = l2 + 1, line2 {
j = imgs2r (im, c1, c2, i, i)
call aaddr (Memr[data], Memr[j], Memr[data], nc)
}
l1 = line1
l2 = line2
} else {
do i = line2 + 1, l2 {
j = imgs2r (im, c1, c2, i, i)
call asubr (Memr[data], Memr[j], Memr[data], nc)
}
do i = line1, l1 - 1 {
j = imgs2r (im, c1, c2, i, i)
call aaddr (Memr[data], Memr[j], Memr[data], nc)
}
l1 = line1
l2 = line2
}
end
# XT_CSUM -- Sum columns
#
# A new sum vector is created when the data pointer is null or if the number
# of lines is changed. If the previous sum overlaps the requested sum then
# additions and subtractions are performed on the previous sum to minimize
# the number of arithmetic operations.
procedure xt_csum (co, col1, col2, line1, line2, data)
pointer co # COIO pointer
int col1, col2 # Column limits of the sum
int line1, line2 # Line limits
pointer data # Data pointer
int i
int ncols, nlines, nc, nl, c1, c2, l1, l2
pointer j
pointer cogetr()
begin
ncols = col2 - col1 + 1
nlines = line2 - line1 + 1
if ((data == NULL) || (nlines != nl)) {
call mfree (data, TY_REAL)
call malloc (data, nlines, TY_REAL)
nl = nlines
c1 = 0
c2 = 0
}
if (ncols != nc) {
nc = ncols
c1 = 0
c2 = 0
}
# If only one column then don't bother with summing.
if (ncols == 1) {
if ((col1 != c1) || (line1 != l1) || (line2 != l2)) {
c1 = col1
c2 = col2
l1 = line1
l2 = line2
j = cogetr (co, c1, l1, l2)
call amovr (Memr[j], Memr[data], nl)
}
return
}
# If the sum limits are outside the last sum limits then form
# the sums from scratch.
if ((col1 > c2) || (col2 < c1) || (line1 != l1) || (line2 != l2)) {
c1 = col1
c2 = col2
l1 = line1
l2 = line2
call aclrr (Memr[data], nlines)
do i = c1, c2 {
j = cogetr (co, i, l1, l2)
call aaddr (Memr[data], Memr[j], Memr[data], nl)
}
# If the sum limits overlap then add and subtract to compute the
# new sums from the previous sums. This minimizes the number of
# arithmetic operations in common applications.
} else if (col1 > c1) {
do i = c1, col1 - 1 {
j = cogetr (co, i, l1, l2)
call asubr (Memr[data], Memr[j], Memr[data], nl)
}
do i = c2 + 1, col2 {
j = cogetr (co, i, l1, l2)
call aaddr (Memr[data], Memr[j], Memr[data], nl)
}
c1 = col1
c2 = col2
} else {
do i = col2 + 1, c2 {
j = cogetr (co, i, l1, l2)
call asubr (Memr[data], Memr[j], Memr[data], nl)
}
do i = col1, c1 - 1 {
j = cogetr (co, i, l1, l2)
call aaddr (Memr[data], Memr[j], Memr[data], nl)
}
c1 = col1
c2 = col2
}
end
# XT_LSUMB -- Sum lines with buffering
#
# A new sum vector is created when the data pointer is null or if the number
# of columns is changed. If the previous sum overlaps the requested sum then
# additions and subtractions are performed on the previous sum to minimize
# the number of arithmetic operations. Buffering of previous lines is done.
procedure xt_lsumb (im, col1, col2, line1, line2, data)
pointer im # IMIO pointer
int col1, col2 # Column limits of the sum
int line1, line2 # Line limits
pointer data # Data pointer
int i
int ncols, nlines, nc, nl, c1, c2, l1, l2
pointer j
pointer imgs2r()
begin
ncols = col2 - col1 + 1
nlines = line2 - line1 + 1
if ((data == NULL) || (ncols != nc)) {
call mfree (data, TY_REAL)
call malloc (data, (nlines + 1) * ncols, TY_REAL)
nc = ncols
l1 = 0
l2 = 0
}
if (nlines != nl) {
nl = nlines
l1 = 0
l2 = 0
}
# If only one line then don't bother with summing.
if (nlines == 1) {
if ((line1 != l1) || (col1 != c1) || (col2 != c2)) {
c1 = col1
c2 = col2
l1 = line1
l2 = line2
j = imgs2r (im, c1, c2, l1, l2)
call amovr (Memr[j], Memr[data], nc)
}
return
}
# If the sum limits are outside the last sum limits then form
# the sums from scratch.
if ((line1 > l2) || (line2 < l1) || (col1 != c1) || (col2 != c2)) {
c1 = col1
c2 = col2
l1 = line1
l2 = line2
call aclrr (Memr[data], nc)
do i = l1, l2 {
j = data + (mod (i, nl) + 1) * nc
call amovr (Memr[imgs2r (im, c1, c2, i, i)], Memr[j], nc)
call aaddr (Memr[data], Memr[j], Memr[data], nc)
}
# If the sum limits overlap then add and subtract to compute the
# new sums from the previous sums. This minimizes the number of
# arithmetic operations in common applications.
} else if (line1 > l1) {
do i = l1, line1 - 1 {
j = data + (mod (i, nl) + 1) * nc
call asubr (Memr[data], Memr[j], Memr[data], nc)
}
do i = l2 + 1, line2 {
j = data + (mod (i, nl) + 1) * nc
call amovr (Memr[imgs2r (im, c1, c2, i, i)], Memr[j], nc)
call aaddr (Memr[data], Memr[j], Memr[data], nc)
}
l1 = line1
l2 = line2
} else {
do i = line2 + 1, l2 {
j = data + (mod (i, nl) + 1) * nc
call asubr (Memr[data], Memr[j], Memr[data], nc)
}
do i = line1, l1 - 1 {
j = data + (mod (i, nl) + 1) * nc
call amovr (Memr[imgs2r (im, c1, c2, i, i)], Memr[j], nc)
call aaddr (Memr[data], Memr[j], Memr[data], nc)
}
l1 = line1
l2 = line2
}
end
# XT_CSUMB -- Sum columns with buffering
#
# A new sum vector is created when the data pointer is null or if the number
# of lines is changed. If the previous sum overlaps the requested sum then
# additions and subtractions are performed on the previous sum to minimize
# the number of arithmetic operations. Buffering is done on the previous cols.
procedure xt_csumb (co, col1, col2, line1, line2, data)
pointer co # COIO pointer
int col1, col2 # Column limits of the sum
int line1, line2 # Line limits
pointer data # Data pointer
int i
int ncols, nlines, nc, nl, c1, c2, l1, l2
pointer j
pointer cogetr()
begin
ncols = col2 - col1 + 1
nlines = line2 - line1 + 1
if ((data == NULL) || (nlines != nl)) {
call mfree (data, TY_REAL)
call malloc (data, (ncols + 1) * nlines, TY_REAL)
nl = nlines
c1 = 0
c2 = 0
}
if (ncols != nc) {
nc = ncols
c1 = 0
c2 = 0
}
# If only one column then don't bother with summing.
if (ncols == 1) {
if ((col1 != c1) || (line1 != l1) || (line2 != l2)) {
c1 = col1
c2 = col2
l1 = line1
l2 = line2
j = cogetr (co, c1, l1, l2)
call amovr (Memr[j], Memr[data], nl)
}
return
}
# If the sum limits are outside the last sum limits then form
# the sums from scratch.
if ((col1 > c2) || (col2 < c1) || (line1 != l1) || (line2 != l2)) {
c1 = col1
c2 = col2
l1 = line1
l2 = line2
call aclrr (Memr[data], nlines)
do i = c1, c2 {
j = data + (mod (i, nc) + 1) * nl
call amovr (Memr[cogetr (co, i, l1, l2)], Memr[j], nl)
call aaddr (Memr[data], Memr[j], Memr[data], nl)
}
# If the sum limits overlap then add and subtract to compute the
# new sums from the previous sums. This minimizes the number of
# arithmetic operations in common applications.
} else if (col1 > c1) {
do i = c1, col1 - 1 {
j = data + (mod (i, nc) + 1) * nl
call asubr (Memr[data], Memr[j], Memr[data], nl)
}
do i = c2 + 1, col2 {
j = data + (mod (i, nc) + 1) * nl
call amovr (Memr[cogetr (co, i, l1, l2)], Memr[j], nl)
call aaddr (Memr[data], Memr[j], Memr[data], nl)
}
c1 = col1
c2 = col2
} else {
do i = col2 + 1, c2 {
j = data + (mod (i, nc) + 1) * nl
call asubr (Memr[data], Memr[j], Memr[data], nl)
}
do i = col1, c1 - 1 {
j = data + (mod (i, nc) + 1) * nl
call amovr (Memr[cogetr (co, i, l1, l2)], Memr[j], nl)
call aaddr (Memr[data], Memr[j], Memr[data], nl)
}
c1 = col1
c2 = col2
}
end
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