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tree_test.f90
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tree_test.f90
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module tree_test_mod
use common_mod, only : mold, DATA_KIND
use rbnode_mod
implicit none
contains
subroutine tree_test_join()
type(rbbasetree_t) :: tree_a, tree_b, tree_ab
integer :: i, ierr
integer, parameter :: NMID=2500000, NRIGHT=2500200
do i=1, NMID-1
call rbnode_insert(tree_a, rbnode_t(transfer(i,mold)), tree_test_basic_comp)
end do
print '("Insertion L - Valid? ",L2," black height is ",i0)', &
tree_a%isvalid(tree_test_basic_comp), tree_a%blackheight()
do i=NRIGHT, NMID+1, -1
!do i=NMID+1, NRIGHT
call rbnode_insert(tree_b, rbnode_t(transfer(i,mold)), tree_test_basic_comp, ierr)
if (ierr/=0) print *, 'Insert ierr = ',ierr
end do
print '("Insertion R - Valid? ",L2," black height is ",i0)', &
tree_b%isvalid(tree_test_basic_comp), tree_b%blackheight()
!call dump_graphviz('our_a', tree_a)
!call dump_graphviz('our_b', tree_b)
tree_ab%root => join(tree_a%root, transfer(NMID,mold), tree_b%root)
print '("Join L+R - Valid? ",L2," black height is ",i0)', &
tree_ab%isvalid(tree_test_basic_comp), tree_ab%blackheight()
!call dump_graphviz('our_ab', tree_ab)
! Delete everything
do i=1,NRIGHT
call rbnode_delete(tree_ab, rbnode_find(tree_ab%root, transfer(i,mold), tree_test_basic_comp))
end do
print '("Empty tree - Valid? ",L2," black height is ",i0)', &
tree_ab%isvalid(tree_test_basic_comp), tree_ab%blackheight()
print *, 'Allocated nodes zero? =', allocation_counter
end subroutine tree_test_join
subroutine tree_test_basic()
integer, parameter, dimension(*) :: DATA=[10, 5, 7, 8, 9, 11, 12, 13]
integer, parameter :: NSIZE = 52
!integer, parameter :: NSIZE = 150000
type(rbnode_t), pointer :: current, output
type(rbbasetree_t) :: tree
integer :: ierr, i, nblacks
integer, allocatable :: y1(:), y2(:)
logical :: isvalid
y1 = get_array(NSIZE)
y2 = shuffle_array(y1)
do i=1, size(y2)
!call rbnode_insert(tree, rbnode_t(transfer(DATA(i),mold)), tree_test_basic_comp, ierr)
call rbnode_insert(tree, rbnode_t(transfer(y2(i),mold)), tree_test_basic_comp, ierr)
if (ierr/=0) print *, 'Insert ierr = ',ierr
end do
print '("Is tree valid after inserion?",L2)', &
tree%isvalid(tree_test_basic_comp)
call dump_graphviz('our_tree', tree)
! traversing
current=>rbnode_leftmost(tree%root)
do
if (.not. associated(current)) exit
write(*,'("[",i0,l2,": ",i0,"]",3x)',advance='no') &
transfer(rbnode_read(current),i), current%is_node_black(), rbnode_blackheight(current)
current => current%nextnode()
end do
write(*,*)
! Deletion
do i=1, size(y2)
call rbnode_delete(tree, rbnode_find(tree%root, &
transfer(y2(i),mold), tree_test_basic_comp) )
if (mod(i,10000)/=0) cycle
isvalid = tree%isvalid(tree_test_basic_comp)
!print *, 'removed ',y2(i), isvalid
if (.not. isvalid) stop 'tree is not valid'
end do
! Root is
if (associated(tree%root)) then
print *, "Root is: ", transfer(rbnode_read(tree%root),i), tree%root%is_node_black()
else
print *, "Root is null:"
end if
! Validation
call rbnode_validate(tree%root, tree_test_basic_comp, isvalid, nblacks)
print '("Is tree valid ?",L2, " black nodes count = ",i0)',isvalid, nblacks
end subroutine
subroutine dump_graphviz(basename, tree)
character(len=*), intent(in) :: basename
type(rbbasetree_t), intent(in) :: tree
character(len=*), parameter :: SUFTXT='gv.txt', SUFPNG='.png'
integer :: fid, cmdstat, exitstat
character(len=200) cmdmsg
if (.not. associated(tree%root)) then
print *, 'Warning: graphviz dump skiped for empty tree'
return
end if
! open a temporary file
open(newunit=fid, file=basename//SUFTXT, status='replace')
write(fid,'(a,/,a)') 'digraph {','node [fontname="Arial"];'
call visit_nodes(tree%root, fid)
write(fid,'(a)') '}'
flush(fid)
call execute_command_line('dot -Tpng < '//basename//SUFTXT//' > '//basename//SUFPNG, &
exitstat=exitstat, cmdstat=cmdstat, cmdmsg=cmdmsg)
if (exitstat/=0 .or. cmdstat/=0) print *, exitstat, cmdstat, cmdmsg
close(fid, status='delete')
end subroutine dump_graphviz
recursive subroutine visit_nodes(current, fid)
type(rbnode_t), pointer, intent(in) :: current
integer, intent(in) :: fid
type(rbnode_t), pointer :: par, left, right
character(len=11) bufcur, bufpar
write(bufcur,'(i11)') transfer(rbnode_read(current),fid)
if (.not. current%is_node_black()) then
write(fid,'(a)') trim(adjustl(bufcur))//' [color=red]'
end if
par => current%upnode()
if (associated(par)) then
write(bufpar,'(i11)') transfer(rbnode_read(par),fid)
write(fid,'(a)') trim(adjustl(bufpar))//' -> '//trim(adjustl(bufcur))
end if
left => current%leftnode()
right => current%rightnode()
if (associated(left)) call visit_nodes(left, fid)
if (associated(right)) call visit_nodes(right, fid)
end subroutine visit_nodes
integer function tree_test_basic_comp(a,b) result(comp)
integer(DATA_KIND), intent(in), dimension(:) :: a, b
integer :: aval, bval
aval = transfer(a,aval)
bval = transfer(b,bval)
if (aval<bval) then
comp = -1
else if (aval>bval) then
comp = 1
else
comp = 0
end if
end function tree_test_basic_comp
pure function get_array(n) result(y)
integer, allocatable :: y(:)
integer, intent(in) :: n
integer :: i
allocate(y(n))
y = [(i, i=1,n)]
end function get_array
function shuffle_array(yin) result(yout)
integer, intent(in) :: yin(:)
integer :: yout(size(yin))
integer :: i, j, n, ytmp
real :: xran
yout = yin
n = size(yin)
do i=1, n-1
call random_number(xran)
! j is in the range
! * i==1: 1...n, i==2: 2..n, i==3: 3..n, i==n-1: n-1..n
j = i-1 + int(xran*(n-i+1))+1
ytmp = yout(j)
yout(j) = yout(i)
yout(i) = ytmp
end do
end function shuffle_array
end module tree_test_mod