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! { dg-do run }
! Check that eoshift works for three-dimensional arrays.
module x
implicit none
contains
subroutine eoshift_0 (array, shift, boundary, dim, res)
real, dimension(:,:,:), intent(in) :: array
real, dimension(:,:,:), intent(out) :: res
integer, value :: shift
real, optional, intent(in) :: boundary
integer, optional, intent(in) :: dim
integer :: s1, s2, s3
integer :: n1, n2, n3
real :: b
integer :: d
if (present(boundary)) then
b = boundary
else
b = 0.0
end if
if (present(dim)) then
d = dim
else
d = 1
end if
n1 = size(array,1)
n2 = size(array,2)
n3 = size(array,3)
select case(dim)
case(1)
if (shift > 0) then
shift = min(shift, n1)
do s3=1,n3
do s2=1,n2
do s1= 1, n1 - shift
res(s1,s2,s3) = array(s1+shift,s2,s3)
end do
do s1 = n1 - shift + 1,n1
res(s1,s2,s3) = b
end do
end do
end do
else
shift = max(shift, -n1)
do s3=1,n3
do s2=1,n2
do s1=1,-shift
res(s1,s2,s3) = b
end do
do s1= 1-shift,n1
res(s1,s2,s3) = array(s1+shift,s2,s3)
end do
end do
end do
end if
case(2)
if (shift > 0) then
shift = min(shift, n2)
do s3=1,n3
do s2=1, n2 - shift
do s1=1,n1
res(s1,s2,s3) = array(s1,s2+shift,s3)
end do
end do
do s2=n2 - shift + 1, n2
do s1=1,n1
res(s1,s2,s3) = b
end do
end do
end do
else
shift = max(shift, -n2)
do s3=1,n3
do s2=1,-shift
do s1=1,n1
res(s1,s2,s3) = b
end do
end do
do s2=1-shift,n2
do s1=1,n1
res(s1,s2,s3) = array(s1,s2+shift,s3)
end do
end do
end do
end if
case(3)
if (shift > 0) then
shift = min(shift, n3)
do s3=1,n3 - shift
do s2=1, n2
do s1=1,n1
res(s1,s2,s3) = array(s1,s2,s3+shift)
end do
end do
end do
do s3=n3 - shift + 1, n3
do s2=1, n2
do s1=1,n1
res(s1,s2,s3) = b
end do
end do
end do
else
shift = max(shift, -n3)
do s3=1,-shift
do s2=1,n2
do s1=1,n1
res(s1,s2,s3) = b
end do
end do
end do
do s3=1-shift,n3
do s2=1,n2
do s1=1,n1
res(s1,s2,s3) = array(s1,s2,s3+shift)
end do
end do
end do
end if
case default
stop "Illegal dim"
end select
end subroutine eoshift_0
end module x
program main
use x
implicit none
integer, parameter :: n1=2,n2=4,n3=2
real, dimension(n1,n2,n3) :: a,b,c
integer :: dim, shift, shift_lim
call random_number(a)
do dim=1,3
if (dim == 1) then
shift_lim = n1 + 1
else if (dim == 2) then
shift_lim = n2 + 1
else
shift_lim = n3 + 1
end if
do shift=-shift_lim, shift_lim
b = eoshift(a,shift,dim=dim)
call eoshift_0 (a, shift=shift, dim=dim, res=c)
if (any (b /= c)) then
print *,"dim = ", dim, "shift = ", shift
STOP 1
end if
end do
end do
call random_number(b)
c = b
do dim=1,3
if (dim == 1) then
shift_lim = n1/2 + 1
else if (dim == 2) then
shift_lim = n2/2 + 1
else
shift_lim = n3/2 + 1
end if
do shift=-shift_lim, shift_lim
b(1:n1:2,:,:) = eoshift(a(1:n1/2,:,:),shift,dim=dim)
call eoshift_0 (a(1:n1/2,:,:), shift=shift, dim=dim, res=c(1:n1:2,:,:))
if (any (b /= c)) STOP 2
end do
end do
end program main
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