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!
!-----------------------------------------------------------------------
!
!Purpose:
! Fortran-2003 bindings for fortran direct access in WIMS-AECL. Open,
! read or close indexed random file using fortran direct access files
! Subroutines:
! OPNIND: open file and read master index
! REDIND: read data on indexed file
! CLSIND: close file
!
!Copyright:
! Copyright (C) 2020 Ecole Polytechnique de Montreal
! This library is free software; you can redistribute it and/or
! modify it under the terms of the GNU Lesser General Public
! License as published by the Free Software Foundation; either
! version 2.1 of the License, or (at your option) any later version.
!
!Author(s): J. Donnelly
!
!Parameters: input/output
! IUNIT read unit
! INDEX index table (master index for OPNIND)
! LINDEX length of index table (LINDEX >=(# of entries) + 1)
! DATA data array to retreive from file
! NWORDS lenght of data array to retreive from file
! KEY location of data array in index
!
!Internal parameter description
! IOUT output unit = 6
! NBLOCKS number of blocks per record = 256
! IOFSET offset for index length = 65536
!
!-----------------------------------------------------------------------
!
module OPNMOD
private
integer iunitr
public :: OPNIND, REDIND, CLSIND
interface REDIND
! read data on indexed file
module procedure REDIND_I1, REDIND_R1
end interface
contains
subroutine OPNIND(iunit,index,lindex)
parameter (iout=6,nblock=256,iofset=65536)
integer iunit,index(lindex),lindex
logical exst, opnd
character dirst*7
!----
! unit number must be > zero
!----
if(iunit.le.0) then
write(iout,6000) iunit
call XABORT('OPNIND: (readonly) illegal unit number')
endif
!----
! find out file status, and if unit already associated with
! an open file
!----
inquire(unit=iunit,exist=exst,opened=opnd,direct=dirst)
if(.not.opnd) then
!----
! file closed
!----
write(iout,6010) iunit
call XABORT('OPNIND: (readonly) file not opened')
endif
if( exst .and. dirst .eq. 'no' ) then
!----
! file already exists, but is not direct access
!----
write(iout,6020) iunit
call XABORT('OPNIND: (readonly) file is nor direct access')
endif
if(.not.exst) then
!----
! file does not exists
!----
write(iout,6030) iunit
call XABORT('OPNIND: (readonly) file does not exists ')
endif
!----
! process the file master index
!----
iunitr=iunit
irec = 1
minw = 1
40 continue
maxw = min0( minw + nblock - 1 , lindex )
ierr=0
read(iunit,rec=irec,iostat=ierr) (index(i),i=minw,maxw)
if(ierr.ne.0) then
write(iout,6040) iunit,ierr
call XABORT('OPNIND: read master record error')
endif
irec = irec + 1
if( maxw .ne. lindex ) then
minw = maxw + 1
go to 40
endif
return
!----
! format
!----
6000 format(' //// OPNIND: file, ',i5,' invalid')
6010 format(' //// OPNIND: file, ',i5,' has not been opened with KDROPN')
6020 format(' //// OPNIND: unit ',i5,' is not a direct access file')
6030 format(' //// OPNIND: unit ',i5,' does not exists (readonly version)')
6040 format(' //// OPNIND: error during reading of master index ', &
'of unit ',i5,' status = ',i5)
end subroutine OPNIND
!----
subroutine CLSIND(iunit)
parameter (iout=6)
integer iunit
if(iunitr.ne.iunit) then
write(iout,6100) iunit
call XABORT('CLSIND: file not opened by OPNIND')
endif
iunitr=kdrcls(iunit,1)
if(iunitr.ne.0) then
write(iout,6110) iunitr
call XABORT('CLSIND: error in file closing')
endif
return
!----
! format
!----
6100 format(' //// CLSIND: unit ',i5,' not found')
6110 format(' //// CLSIND: error status =',i5,' from kdrcls')
end subroutine CLSIND
!----
subroutine REDIND_I1(iunit,index,lindex,data,nwords,key)
parameter (iout=6,nblock=256,iofset=65536)
integer iunit,index(lindex),lindex,nwords,key
integer data(nwords)
!
if(iunitr.ne.iunit) then
write(iout,6200) iunit
call XABORT('REDIND_I1: file not opened by OPNIND')
endif
!----
! validate key number
!----
if(key.le.0.or.key.ge.lindex) then
write(iout,6210) iunit, key
call XABORT('REDIND_I1: invalid key')
endif
!----
! key number valid, validate record number
!----
indr=index(key+1)
if(indr.eq.0) then
write(iout,6220) iunit, key
call XABORT('REDIND_I1: invalid record number for key')
endif
!----
! validate record length
!----
lrecrd = (nwords-1)/nblock + 1
loldrc = indr/iofset
if(loldrc.lt.lrecrd) then
write(iout,6230) iunit, key
call XABORT('REDIND_I1: invalid record length')
endif
!----
! record found, read the data
!----
nrec = mod( indr, iofset )
minw = 1
50 continue
maxw = min0( minw + nblock - 1 , nwords )
ierr=0
read(iunit,rec=nrec,iostat=ierr) (data(i),i=minw,maxw)
if(ierr.ne.0) then
write(iout,6240) iunit,ierr
call XABORT('REDIND_I1: read record error')
endif
nrec = nrec + 1
if( maxw .ne. nwords ) then
minw = maxw + 1
go to 50
endif
return
!----
! format
!----
6200 format(' //// REDIND_I1: unit ',i5,' not found')
6210 format(' //// REDIND_I1: invalid record number, unit ',i5,' key= ',i10)
6220 format(' //// REDIND_I1: non-existant record, unit ',i5, &
' record key =',i10)
6230 format(' //// REDIND_I1: data count exceeds record, unit ',i5, &
' record key =',i10)
6240 format(' //// REDIND_I1: error during reading of record ', &
'of unit ',i5,' status = ',i5)
end subroutine REDIND_I1
!----
subroutine REDIND_R1(iunit,index,lindex,data,nwords,key)
parameter (iout=6,nblock=256,iofset=65536)
integer iunit,index(lindex),lindex,nwords,key
real data(nwords)
!
if(iunitr.ne.iunit) then
write(iout,6200) iunit
call XABORT('REDIND_R1: file not opened by OPNIND')
endif
!----
! validate key number
!----
if(key.le.0.or.key.ge.lindex) then
write(iout,6210) iunit, key
call XABORT('REDIND_R1: invalid key')
endif
!----
! key number valid, validate record number
!----
indr=index(key+1)
if(indr.eq.0) then
write(iout,6220) iunit, key
call XABORT('REDIND_R1: invalid record number for key')
endif
!----
! validate record length
!----
lrecrd = (nwords-1)/nblock + 1
loldrc = indr/iofset
if(loldrc.lt.lrecrd) then
write(iout,6230) iunit, key
call XABORT('REDIND_R1: invalid record length')
endif
!----
! record found, read the data
!----
nrec = mod( indr, iofset )
minw = 1
50 continue
maxw = min0( minw + nblock - 1 , nwords )
ierr=0
read(iunit,rec=nrec,iostat=ierr) (data(i),i=minw,maxw)
if(ierr.ne.0) then
write(iout,6240) iunit,ierr
call XABORT('REDIND_R1: read record error')
endif
nrec = nrec + 1
if( maxw .ne. nwords ) then
minw = maxw + 1
go to 50
endif
return
!----
! format
!----
6200 format(' //// REDIND_R1: unit ',i5,' not found')
6210 format(' //// REDIND_R1: invalid record number, unit ',i5,' key= ',i10)
6220 format(' //// REDIND_R1: non-existant record, unit ',i5, &
' record key =',i10)
6230 format(' //// REDIND_R1: data count exceeds record, unit ',i5, &
' record key =',i10)
6240 format(' //// REDIND_R1: error during reading of record ', &
'of unit ',i5,' status = ',i5)
end subroutine REDIND_R1
end module OPNMOD
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