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! { dg-do run }
! Check that eoshift works for three-dimensional arrays.
module x
implicit none
contains
subroutine eoshift_3 (array, shift, boundary, dim, res)
real, dimension(:,:,:), intent(in) :: array
real, dimension(:,:,:), intent(out) :: res
integer, dimension(:,:), intent(in) :: shift
real, optional, dimension(:,:), intent(in) :: boundary
integer, optional, intent(in) :: dim
integer :: s1, s2, s3
integer :: n1, n2, n3
integer :: sh
real :: b
integer :: d
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)
do s3=1,n3
do s2=1,n2
sh = shift(s2,s3)
b = boundary(s2,s3)
if (sh > 0) then
sh = min(sh, n1)
do s1= 1, n1 - sh
res(s1,s2,s3) = array(s1+sh,s2,s3)
end do
do s1 = n1 - sh + 1,n1
res(s1,s2,s3) = b
end do
else
sh = max(sh, -n1)
do s1=1,-sh
res(s1,s2,s3) = b
end do
do s1= 1-sh,n1
res(s1,s2,s3) = array(s1+sh,s2,s3)
end do
end if
end do
end do
case(2)
do s3=1,n3
do s1=1,n1
sh = shift(s1,s3)
b = boundary(s1,s3)
if (sh > 0) then
sh = min (sh, n2)
do s2=1, n2 - sh
res(s1,s2,s3) = array(s1,s2+sh,s3)
end do
do s2=n2 - sh + 1, n2
res(s1,s2,s3) = b
end do
else
sh = max(sh, -n2)
do s2=1,-sh
res(s1,s2,s3) = b
end do
do s2=1-sh,n2
res(s1,s2,s3) = array(s1,s2+sh,s3)
end do
end if
end do
end do
case(3)
do s2=1, n2
do s1=1,n1
sh = shift(s1, s2)
b = boundary(s1, s2)
if (sh > 0) then
sh = min(sh, n3)
do s3=1,n3 - sh
res(s1,s2,s3) = array(s1,s2,s3+sh)
end do
do s3=n3 - sh + 1, n3
res(s1,s2,s3) = b
end do
else
sh = max(sh, -n3)
do s3=1,-sh
res(s1,s2,s3) = b
end do
do s3=1-sh,n3
res(s1,s2,s3) = array(s1,s2,s3+sh)
end do
end if
end do
end do
case default
stop "Illegal dim"
end select
end subroutine eoshift_3
subroutine fill_shift(x, n)
integer, intent(out), dimension(:,:) :: x
integer, intent(in) :: n
integer :: n1, n2, s1, s2
integer :: v
v = -n - 1
n1 = size(x,1)
n2 = size(x,2)
do s2=1,n2
do s1=1,n1
x(s1,s2) = v
v = v + 1
if (v > n + 1) v = -n - 1
end do
end do
end subroutine fill_shift
end module x
program main
use x
implicit none
integer, parameter :: n1=10,n2=30,n3=40
real, dimension(n1,n2,n3) :: a,b,c
real, dimension(2*n1,n2,n3) :: a2, c2
integer :: dim
integer, dimension(n2,n3), target :: sh1
integer, dimension(n1,n3), target :: sh2
integer, dimension(n1,n2), target :: sh3
real, dimension(n2,n3), target :: b1
real, dimension(n1,n3), target :: b2
real, dimension(n1,n2), target :: b3
integer, dimension(:,:), pointer :: sp
real, dimension(:,:), pointer :: bp
call random_number(a)
call random_number(b1)
call random_number(b2)
call random_number(b3)
call fill_shift(sh1, n1)
call fill_shift(sh2, n2)
call fill_shift(sh3, n3)
do dim=1,3
if (dim == 1) then
sp => sh1
bp => b1
else if (dim == 2) then
sp => sh2
bp => b2
else
sp => sh3
bp => b3
end if
b = eoshift(a,shift=sp,dim=dim,boundary=bp)
call eoshift_3 (a, shift=sp, dim=dim, boundary=bp,res=c)
if (any (b /= c)) then
STOP 1
end if
a2 = 42.
a2(1:2*n1:2,:,:) = a
b = eoshift(a2(1:2*n1:2,:,:), shift=sp, dim=dim, boundary=bp)
if (any(b /= c)) then
STOP 2
end if
c2 = 43.
c2(1:2*n1:2,:,:) = eoshift(a, shift=sp, dim=dim, boundary=bp)
if (any(c2(1:2*n1:2,:,:) /= c)) then
STOP 3
end if
if (any(c2(2:2*n1:2,:,:) /= 43.)) then
STOP 4
end if
end do
end program main
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