Added first round of heap handling routines for MLD2P4.

psblas3-type-indexed
Salvatore Filippone 17 years ago
parent ab034762ab
commit 9d10b5104e

@ -1,7 +1,7 @@
include ../../Make.inc include ../../Make.inc
MODULES = psb_realloc_mod.o psb_string_mod.o psb_spmat_type.o \ MODULES = psb_realloc_mod.o psb_string_mod.o psb_spmat_type.o \
psb_desc_type.o psb_spsb_mod.o \ psb_desc_type.o psb_spsb_mod.o psb_sort_mod.o\
psb_serial_mod.o psb_tools_mod.o \ psb_serial_mod.o psb_tools_mod.o \
psb_error_mod.o \ psb_error_mod.o \
psb_const_mod.o \ psb_const_mod.o \
@ -25,6 +25,8 @@ psb_penv_mod.o: psb_const_mod.o psb_error_mod.o psb_realloc_mod.o
psi_mod.o: psb_penv_mod.o psb_error_mod.o psb_desc_type.o psi_mod.o: psb_penv_mod.o psb_error_mod.o psb_desc_type.o
psb_desc_type.o: psb_const_mod.o psb_error_mod.o psb_penv_mod.o psb_desc_type.o: psb_const_mod.o psb_error_mod.o psb_penv_mod.o
psb_check_mod.o: psb_desc_type.o psb_check_mod.o: psb_desc_type.o
psb_serial_mod: psb_spmat_type.o psb_string_mod.o psb_sort_mod.o
psb_sort_mod.o: psb_error_mod.o psb_realloc_mod.o
psb_methd_mod.o: psb_serial_mod.o psb_desc_type.o psb_prec_type.o psb_methd_mod.o: psb_serial_mod.o psb_desc_type.o psb_prec_type.o
psb_tools_mod.o: psb_spmat_type.o psb_desc_type.o psi_mod.o psb_gps_mod.o psb_tools_mod.o: psb_spmat_type.o psb_desc_type.o psi_mod.o psb_gps_mod.o
psb_gps_mod.o: psb_realloc_mod.o psb_gps_mod.o: psb_realloc_mod.o

@ -31,6 +31,7 @@
module psb_serial_mod module psb_serial_mod
use psb_spmat_type use psb_spmat_type
use psb_string_mod use psb_string_mod
use psb_sort_mod
interface psb_csdp interface psb_csdp
subroutine psb_dcsdp(a, b,info,ifc,check,trans,unitd,upd,dupl) subroutine psb_dcsdp(a, b,info,ifc,check,trans,unitd,upd,dupl)
@ -544,363 +545,5 @@ module psb_serial_mod
end interface end interface
interface psb_msort
module procedure imsort
end interface
interface psb_msort_unique
module procedure imsort_u
end interface
interface psb_qsort
module procedure iqsort, dqsort, zqsort
end interface
integer, parameter :: psb_sort_up_=1, psb_sort_down_=-1
integer, parameter :: psb_lsort_up_=2, psb_lsort_down_=-2
integer, parameter :: psb_asort_up_=3, psb_asort_down_=-3
integer, parameter :: psb_alsort_up_=4, psb_alsort_down_=-4
integer, parameter :: psb_sort_ovw_idx_=0, psb_sort_keep_idx_=1
contains
subroutine imsort(x,ix,dir,flag)
use psb_error_mod
implicit none
integer, intent(inout) :: x(:)
integer, optional, intent(in) :: dir, flag
integer, optional, intent(inout) :: ix(:)
integer :: dir_, flag_, n, err_act
character(len=20) :: name
name='psb_msort'
call psb_erractionsave(err_act)
if (present(dir)) then
dir_ = dir
else
dir_= psb_sort_up_
end if
select case(dir_)
case( psb_sort_up_, psb_sort_down_)
! OK keep going
case default
call psb_errpush(30,name,i_err=(/3,dir_,0,0,0/))
goto 9999
end select
n = size(x)
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
if (present(flag)) then
flag_ = flag
else
flag_ = psb_sort_ovw_idx_
end if
select case(flag_)
case( psb_sort_ovw_idx_, psb_sort_keep_idx_)
! OK keep going
case default
call psb_errpush(30,name,i_err=(/4,flag_,0,0,0/))
goto 9999
end select
call imsrx(n,x,ix,dir_,flag_)
else
call imsr(n,x,dir_)
end if
9999 continue
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
end subroutine imsort
subroutine imsort_u(x,nout,dir)
use psb_error_mod
implicit none
integer, intent(inout) :: x(:)
integer, intent(out) :: nout
integer, optional, intent(in) :: dir
integer :: dir_, flag_, n, err_act
character(len=20) :: name
name='psb_msort_u'
call psb_erractionsave(err_act)
if (present(dir)) then
dir_ = dir
else
dir_= psb_sort_up_
end if
select case(dir_)
case( psb_sort_up_, psb_sort_down_)
! OK keep going
case default
call psb_errpush(30,name,i_err=(/3,dir_,0,0,0/))
goto 9999
end select
n = size(x)
call imsru(n,x,dir_,nout)
9999 continue
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
end subroutine imsort_u
subroutine iqsort(x,ix,dir,flag)
use psb_error_mod
implicit none
integer, intent(inout) :: x(:)
integer, optional, intent(in) :: dir, flag
integer, optional, intent(inout) :: ix(:)
integer :: dir_, flag_, n, err_act
character(len=20) :: name
name='psb_qsort'
call psb_erractionsave(err_act)
if (present(flag)) then
flag_ = flag
else
flag_ = psb_sort_ovw_idx_
end if
select case(flag_)
case( psb_sort_ovw_idx_, psb_sort_keep_idx_)
! OK keep going
case default
call psb_errpush(30,name,i_err=(/4,flag_,0,0,0/))
goto 9999
end select
if (present(dir)) then
dir_ = dir
else
dir_= psb_sort_up_
end if
n = size(x)
select case(dir_)
case( psb_sort_up_, psb_sort_down_)
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
call isrx(n,x,ix,dir_,flag_)
else
call isr(n,x,dir_)
end if
case( psb_asort_up_, psb_asort_down_)
! OK keep going
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
call iasrx(n,x,ix,dir_,flag_)
else
call iasr(n,x,dir_)
end if
case default
call psb_errpush(30,name,i_err=(/3,dir_,0,0,0/))
goto 9999
end select
9999 continue
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
end subroutine iqsort
subroutine dqsort(x,ix,dir,flag)
use psb_error_mod
implicit none
real(kind(1.d0)), intent(inout) :: x(:)
integer, optional, intent(in) :: dir, flag
integer, optional, intent(inout) :: ix(:)
integer :: dir_, flag_, n, err_act
character(len=20) :: name
name='psb_qsort'
call psb_erractionsave(err_act)
if (present(flag)) then
flag_ = flag
else
flag_ = psb_sort_ovw_idx_
end if
select case(flag_)
case( psb_sort_ovw_idx_, psb_sort_keep_idx_)
! OK keep going
case default
call psb_errpush(30,name,i_err=(/4,flag_,0,0,0/))
goto 9999
end select
if (present(dir)) then
dir_ = dir
else
dir_= psb_sort_up_
end if
n = size(x)
select case(dir_)
case( psb_sort_up_, psb_sort_down_)
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
call dsrx(n,x,ix,dir_,flag_)
else
call dsr(n,x,dir_)
end if
case( psb_asort_up_, psb_asort_down_)
! OK keep going
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
call dasrx(n,x,ix,dir_,flag_)
else
call dasr(n,x,dir_)
end if
case default
call psb_errpush(30,name,i_err=(/3,dir_,0,0,0/))
goto 9999
end select
9999 continue
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
end subroutine dqsort
subroutine zqsort(x,ix,dir,flag)
use psb_error_mod
implicit none
complex(kind(1.d0)), intent(inout) :: x(:)
integer, optional, intent(in) :: dir, flag
integer, optional, intent(inout) :: ix(:)
integer :: dir_, flag_, n, err_act
character(len=20) :: name
name='psb_qsort'
call psb_erractionsave(err_act)
if (present(flag)) then
flag_ = flag
else
flag_ = psb_sort_ovw_idx_
end if
select case(flag_)
case( psb_sort_ovw_idx_, psb_sort_keep_idx_)
! OK keep going
case default
call psb_errpush(30,name,i_err=(/4,flag_,0,0,0/))
goto 9999
end select
if (present(dir)) then
dir_ = dir
else
dir_= psb_lsort_up_
end if
n = size(x)
select case(dir_)
case( psb_lsort_up_, psb_lsort_down_)
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
call zlsrx(n,x,ix,dir_,flag_)
else
call zlsr(n,x,dir_)
end if
case( psb_alsort_up_, psb_alsort_down_)
! OK keep going
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
call zalsrx(n,x,ix,dir_,flag_)
else
call zalsr(n,x,dir_)
end if
case( psb_asort_up_, psb_asort_down_)
! OK keep going
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
call zasrx(n,x,ix,dir_,flag_)
else
call zasr(n,x,dir_)
end if
case default
call psb_errpush(30,name,i_err=(/3,dir_,0,0,0/))
goto 9999
end select
9999 continue
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
end subroutine zqsort
end module psb_serial_mod end module psb_serial_mod

@ -0,0 +1,630 @@
!!$
!!$ Parallel Sparse BLAS v2.0
!!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari University of Rome Tor Vergata
!!$
!!$ Redistribution and use in source and binary forms, with or without
!!$ modification, are permitted provided that the following conditions
!!$ are met:
!!$ 1. Redistributions of source code must retain the above copyright
!!$ notice, this list of conditions and the following disclaimer.
!!$ 2. Redistributions in binary form must reproduce the above copyright
!!$ notice, this list of conditions, and the following disclaimer in the
!!$ documentation and/or other materials provided with the distribution.
!!$ 3. The name of the PSBLAS group or the names of its contributors may
!!$ not be used to endorse or promote products derived from this
!!$ software without specific written permission.
!!$
!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
!!$ POSSIBILITY OF SUCH DAMAGE.
!!$
!!$
module psb_sort_mod
integer, parameter :: psb_sort_up_=1, psb_sort_down_=-1
integer, parameter :: psb_lsort_up_=2, psb_lsort_down_=-2
integer, parameter :: psb_asort_up_=3, psb_asort_down_=-3
integer, parameter :: psb_alsort_up_=4, psb_alsort_down_=-4
integer, parameter :: psb_sort_ovw_idx_=0, psb_sort_keep_idx_=1
integer, parameter :: psb_heap_resize=200
type psb_int_heap
integer :: last, dir
integer, allocatable :: keys(:)
end type psb_int_heap
interface psb_msort
module procedure imsort
end interface
interface psb_msort_unique
module procedure imsort_u
end interface
interface psb_qsort
module procedure iqsort, dqsort, zqsort
end interface
interface psb_init_heap
module procedure psb_init_int_heap
end interface
interface psb_dump_heap
module procedure psb_dump_int_heap
end interface
interface psb_howmany_heap
module procedure psb_howmany_int_heap
end interface
interface psb_insert_heap
module procedure psb_insert_int_heap
end interface
interface psb_heap_get_first
module procedure psb_int_heap_get_first
end interface
contains
subroutine imsort(x,ix,dir,flag)
use psb_error_mod
implicit none
integer, intent(inout) :: x(:)
integer, optional, intent(in) :: dir, flag
integer, optional, intent(inout) :: ix(:)
integer :: dir_, flag_, n, err_act
character(len=20) :: name
name='psb_msort'
call psb_erractionsave(err_act)
if (present(dir)) then
dir_ = dir
else
dir_= psb_sort_up_
end if
select case(dir_)
case( psb_sort_up_, psb_sort_down_)
! OK keep going
case default
call psb_errpush(30,name,i_err=(/3,dir_,0,0,0/))
goto 9999
end select
n = size(x)
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
if (present(flag)) then
flag_ = flag
else
flag_ = psb_sort_ovw_idx_
end if
select case(flag_)
case( psb_sort_ovw_idx_, psb_sort_keep_idx_)
! OK keep going
case default
call psb_errpush(30,name,i_err=(/4,flag_,0,0,0/))
goto 9999
end select
call imsrx(n,x,ix,dir_,flag_)
else
call imsr(n,x,dir_)
end if
9999 continue
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
end subroutine imsort
subroutine imsort_u(x,nout,dir)
use psb_error_mod
implicit none
integer, intent(inout) :: x(:)
integer, intent(out) :: nout
integer, optional, intent(in) :: dir
integer :: dir_, flag_, n, err_act
character(len=20) :: name
name='psb_msort_u'
call psb_erractionsave(err_act)
if (present(dir)) then
dir_ = dir
else
dir_= psb_sort_up_
end if
select case(dir_)
case( psb_sort_up_, psb_sort_down_)
! OK keep going
case default
call psb_errpush(30,name,i_err=(/3,dir_,0,0,0/))
goto 9999
end select
n = size(x)
call imsru(n,x,dir_,nout)
9999 continue
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
end subroutine imsort_u
subroutine iqsort(x,ix,dir,flag)
use psb_error_mod
implicit none
integer, intent(inout) :: x(:)
integer, optional, intent(in) :: dir, flag
integer, optional, intent(inout) :: ix(:)
integer :: dir_, flag_, n, err_act
character(len=20) :: name
name='psb_qsort'
call psb_erractionsave(err_act)
if (present(flag)) then
flag_ = flag
else
flag_ = psb_sort_ovw_idx_
end if
select case(flag_)
case( psb_sort_ovw_idx_, psb_sort_keep_idx_)
! OK keep going
case default
call psb_errpush(30,name,i_err=(/4,flag_,0,0,0/))
goto 9999
end select
if (present(dir)) then
dir_ = dir
else
dir_= psb_sort_up_
end if
n = size(x)
select case(dir_)
case( psb_sort_up_, psb_sort_down_)
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
call isrx(n,x,ix,dir_,flag_)
else
call isr(n,x,dir_)
end if
case( psb_asort_up_, psb_asort_down_)
! OK keep going
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
call iasrx(n,x,ix,dir_,flag_)
else
call iasr(n,x,dir_)
end if
case default
call psb_errpush(30,name,i_err=(/3,dir_,0,0,0/))
goto 9999
end select
9999 continue
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
end subroutine iqsort
subroutine dqsort(x,ix,dir,flag)
use psb_error_mod
implicit none
real(kind(1.d0)), intent(inout) :: x(:)
integer, optional, intent(in) :: dir, flag
integer, optional, intent(inout) :: ix(:)
integer :: dir_, flag_, n, err_act
character(len=20) :: name
name='psb_qsort'
call psb_erractionsave(err_act)
if (present(flag)) then
flag_ = flag
else
flag_ = psb_sort_ovw_idx_
end if
select case(flag_)
case( psb_sort_ovw_idx_, psb_sort_keep_idx_)
! OK keep going
case default
call psb_errpush(30,name,i_err=(/4,flag_,0,0,0/))
goto 9999
end select
if (present(dir)) then
dir_ = dir
else
dir_= psb_sort_up_
end if
n = size(x)
select case(dir_)
case( psb_sort_up_, psb_sort_down_)
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
call dsrx(n,x,ix,dir_,flag_)
else
call dsr(n,x,dir_)
end if
case( psb_asort_up_, psb_asort_down_)
! OK keep going
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
call dasrx(n,x,ix,dir_,flag_)
else
call dasr(n,x,dir_)
end if
case default
call psb_errpush(30,name,i_err=(/3,dir_,0,0,0/))
goto 9999
end select
9999 continue
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
end subroutine dqsort
subroutine zqsort(x,ix,dir,flag)
use psb_error_mod
implicit none
complex(kind(1.d0)), intent(inout) :: x(:)
integer, optional, intent(in) :: dir, flag
integer, optional, intent(inout) :: ix(:)
integer :: dir_, flag_, n, err_act
character(len=20) :: name
name='psb_qsort'
call psb_erractionsave(err_act)
if (present(flag)) then
flag_ = flag
else
flag_ = psb_sort_ovw_idx_
end if
select case(flag_)
case( psb_sort_ovw_idx_, psb_sort_keep_idx_)
! OK keep going
case default
call psb_errpush(30,name,i_err=(/4,flag_,0,0,0/))
goto 9999
end select
if (present(dir)) then
dir_ = dir
else
dir_= psb_lsort_up_
end if
n = size(x)
select case(dir_)
case( psb_lsort_up_, psb_lsort_down_)
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
call zlsrx(n,x,ix,dir_,flag_)
else
call zlsr(n,x,dir_)
end if
case( psb_alsort_up_, psb_alsort_down_)
! OK keep going
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
call zalsrx(n,x,ix,dir_,flag_)
else
call zalsr(n,x,dir_)
end if
case( psb_asort_up_, psb_asort_down_)
! OK keep going
if (present(ix)) then
if (size(ix) < n) then
call psb_errpush(35,name,i_err=(/2,size(ix),0,0,0/))
goto 9999
end if
call zasrx(n,x,ix,dir_,flag_)
else
call zasr(n,x,dir_)
end if
case default
call psb_errpush(30,name,i_err=(/3,dir_,0,0,0/))
goto 9999
end select
9999 continue
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
end subroutine zqsort
function psb_howmany_int_heap(heap)
implicit none
type(psb_int_heap), intent(in) :: heap
integer :: psb_howmany_int_heap
psb_howmany_int_heap = heap%last
end function psb_howmany_int_heap
subroutine psb_init_int_heap(heap,info,dir)
use psb_realloc_mod
implicit none
type(psb_int_heap), intent(inout) :: heap
integer, intent(out) :: info
integer, intent(in), optional :: dir
info = 0
heap%last=0
if (present(dir)) then
heap%dir = dir
else
heap%dir = psb_sort_up_
endif
select case(heap%dir)
case (psb_sort_up_,psb_sort_down_)
! ok, do nothing
case default
write(0,*) 'Invalid direction, defaulting to psb_sort_up_'
heap%dir = psb_sort_up_
end select
call psb_ensure_size(psb_heap_resize,heap%keys,info)
return
end subroutine psb_init_int_heap
subroutine psb_dump_int_heap(iout,heap,info)
implicit none
type(psb_int_heap), intent(in) :: heap
integer, intent(out) :: info
integer, intent(in) :: iout
info = 0
if (iout < 0) then
write(0,*) 'Invalid file '
info =-1
return
end if
write(iout,*) 'Heap direction ',heap%dir
write(iout,*) 'Heap size ',heap%last
if ((heap%last > 0).and.((.not.allocated(heap%keys)).or.&
& (size(heap%keys)<heap%last))) then
write(iout,*) 'Inconsistent size/allocation status!!'
else
if (heap%last > 0) then
write(iout,*) heap%keys(1:heap%last)
end if
end if
end subroutine psb_dump_int_heap
subroutine psb_insert_int_heap(key,heap,info)
use psb_realloc_mod
implicit none
integer, intent(in) :: key
type(psb_int_heap), intent(inout) :: heap
integer, intent(out) :: info
integer :: i, i2, itemp
info = 0
if (heap%last < 0) then
write(0,*) 'Invalid last in heap ',heap%last
info = heap%last
return
endif
select case(heap%dir)
case (psb_sort_up_)
heap%last = heap%last + 1
if (heap%last > size(heap%keys)) then
call psb_realloc(heap%last+psb_heap_resize,heap%keys,info)
if (info /= 0) then
write(0,*) 'Memory allocation failure'
return
end if
end if
i = heap%last
heap%keys(i) = key
do
if (i<=1) exit
i2 = i/2
if (heap%keys(i) < heap%keys(i2)) then
itemp = heap%keys(i)
heap%keys(i) = heap%keys(i2)
heap%keys(i2) = itemp
i = i2
else
exit
end if
end do
case (psb_sort_down_)
heap%last = heap%last + 1
if (heap%last > size(heap%keys)) then
call psb_realloc(heap%last+psb_heap_resize,heap%keys,info)
if (info /= 0) then
write(0,*) 'Memory allocation failure'
return
end if
end if
i = heap%last
heap%keys(i) = key
do
if (i<=1) exit
i2 = i/2
if (heap%keys(i) > heap%keys(i2)) then
itemp = heap%keys(i)
heap%keys(i) = heap%keys(i2)
heap%keys(i2) = itemp
i = i2
else
exit
end if
end do
case default
write(0,*) 'Invalid direction in heap ',heap%dir
end select
return
end subroutine psb_insert_int_heap
subroutine psb_int_heap_get_first(key,heap,info)
implicit none
type(psb_int_heap), intent(inout) :: heap
integer, intent(out) :: key,info
integer :: i, i2, itemp,last,j
info = 0
if (heap%last <= 0) then
key = 0
info = -1
return
endif
key = heap%keys(1)
heap%keys(1) = heap%keys(heap%last)
heap%last = heap%last - 1
last = heap%last
select case(heap%dir)
case (psb_sort_up_)
i = 1
do
if (i > (last/2)) exit
if ( (heap%keys(2*i) < heap%keys(2*i+1)) .or.&
& (2*i == last)) then
j = 2*i
else
j = 2*i + 1
end if
if (heap%keys(i) > heap%keys(j)) then
itemp = heap%keys(i)
heap%keys(i) = heap%keys(j)
heap%keys(j) = itemp
i = j
else
exit
end if
end do
case (psb_sort_down_)
i = 1
do
if (i > (last/2)) exit
if ( (heap%keys(2*i) > heap%keys(2*i+1)) .or.&
& (2*i == last)) then
j = 2*i
else
j = 2*i + 1
end if
if (heap%keys(i) < heap%keys(j)) then
itemp = heap%keys(i)
heap%keys(i) = heap%keys(j)
heap%keys(j) = itemp
i = j
else
exit
end if
end do
case default
write(0,*) 'Invalid direction in heap ',heap%dir
end select
return
end subroutine psb_int_heap_get_first
end module psb_sort_mod
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