C $Header: /u/gcmpack/MITgcm/pkg/mdsio/mdsio_gl_slice.F,v 1.14 2013/01/13 22:43:53 jmc Exp $
C $Name:  $

#include "MDSIO_OPTIONS.h"

C--  File mdsio_gl_slice.F: Routines to handle mid-level I/O interface.
C--   Contents
C--   o MDSREADFIELD_XZ_GL
C--   o MDSREADFIELD_YZ_GL
C--   o MDSWRITEFIELD_XZ_GL
C--   o MDSWRITEFIELD_YZ_GL

C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----|

      SUBROUTINE MDSREADFIELD_XZ_GL(
     I   fName,
     I   filePrec,
     I   arrType,
     I   nNz,
     O   arr_gl,
     I   irecord,
     I   myThid )
C
C Arguments:
C
C fName      string  :: base name for file to read
C filePrec   integer :: number of bits per word in file (32 or 64)
C arrType    char(2) :: declaration of "arr": either "RS" or "RL"
C nNz        integer :: size of third dimension: normally either 1 or Nr
C arr         RS/RL  :: array to read into, arr(:,:,nNz,:,:)
C irecord    integer :: record number to read
C myThid     integer :: thread identifier
C
C MDSREADFIELD first checks to see if the file "fName" exists, then
C if the file "fName.data" exists and finally the tiled files of the
C form "fName.xxx.yyy.data" exist. Currently, the meta-files are not
C read because it is difficult to parse files in fortran.
C The precision of the file is decsribed by filePrec, set either
C to floatPrec32 or floatPrec64. The precision or declaration of
C the array argument must be consistently described by the char*(2)
C string arrType, either "RS" or "RL". nNz allows for both 2-D and
C 3-D arrays to be handled. nNz=1 implies a 2-D model field and
C nNz=Nr implies a 3-D model field. irecord is the record number
C to be read and must be >= 1. The file data is stored in
C arr *but* the overlaps are *not* updated. ie. An exchange must
C be called. This is because the routine is sometimes called from
C within a MASTER_THID region.
C
C Created: 03/16/99 adcroft@mit.edu

      implicit none
C Global variables / common blocks
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"

C Routine arguments
      character*(*) fName
      integer filePrec
      character*(2) arrType
      integer nNz
      _RL arr_gl(sNx,nSx,nPx,nSy,nPy,Nr)
      integer irecord
      integer myThid

#ifdef ALLOW_AUTODIFF
C Functions
      integer ILNBLNK
      integer MDS_RECLEN
C Local variables
      character*(MAX_LEN_FNAM) dataFName
      integer ip,jp,iG,jG,irec,bi,bj,ii,k,dUnit,IL
      logical exst
      _RL arr(1-oLx:sNx+oLx,Nr,nSx,nSy)
      Real*4 r4seg(sNx)
      Real*8 r8seg(sNx)
      logical globalFile,fileIsOpen
      integer length_of_rec
      character*(max_len_mbuf) msgbuf
C     ------------------------------------------------------------------

C Only do I/O if I am the master thread
      _BEGIN_MASTER( myThid )

#ifndef REAL4_IS_SLOW
      if (arrType .eq. 'RS') then
       write(msgbuf,'(a)')
     &   ' MDSREADFIELD_XZ_GL is wrong for arrType="RS" (=real*4)'
       call print_error( msgbuf, mythid )
       stop 'ABNORMAL END: S/R MDSREADFIELD_XZ_GL'
      endif
#endif

C Record number must be >= 1
      if (irecord .LT. 1) then
       write(msgbuf,'(a,i9.8)')
     &   ' MDSREADFIELD_XZ_GL: argument irecord = ',irecord
       call print_message( msgbuf, standardmessageunit,
     &                     SQUEEZE_RIGHT , mythid)
       write(msgbuf,'(a)')
     &   ' MDSREADFIELD_XZ_GL: Invalid value for irecord'
       call print_error( msgbuf, mythid )
       stop 'ABNORMAL END: S/R MDSREADFIELD_XZ_GL'
      endif

C Assume nothing
      globalFile = .FALSE.
      fileIsOpen = .FALSE.
      IL=ILNBLNK( fName )

C Assign a free unit number as the I/O channel for this routine
      call MDSFINDUNIT( dUnit, mythid )

C Check first for global file with simple name (ie. fName)
      dataFName = fName
      inquire( file=dataFname, exist=exst )
      if (exst) then
       write(msgbuf,'(a,a)')
     &   ' MDSREADFIELD: opening global file: ',dataFName(1:IL)
       call print_message( msgbuf, standardmessageunit,
     &                     SQUEEZE_RIGHT , mythid)
      endif

C If negative check for global file with MDS name (ie. fName.data)
      if (.NOT. globalFile) then
       write(dataFname,'(2a)') fName(1:IL),'.data'
       inquire( file=dataFname, exist=exst )
       if (exst) then
        write(msgbuf,'(a,a)')
     &   ' MDSREADFIELD_XZ_GL: opening global file: ',dataFName(1:IL+5)
        call print_message( msgbuf, standardmessageunit,
     &                      SQUEEZE_RIGHT , mythid)
        globalFile = .TRUE.
       endif
      endif

C Loop over all processors
      do jp=1,nPy
      do ip=1,nPx
C Loop over all tiles
      do bj=1,nSy
      do bi=1,nSx
C If we are reading from a tiled MDS file then we open each one here
        if (.NOT. globalFile) then
         iG=bi+(ip-1)*nsx ! Kludge until unstructered tiles
         jG=bj+(jp-1)*nsy ! Kludge until unstructered tiles
         write(dataFname,'(2a,i3.3,a,i3.3,a)')
     &              fName(1:IL),'.',iG,'.',jG,'.data'
         inquire( file=dataFname, exist=exst )
C Of course, we only open the file if the tile is "active"
C (This is a place-holder for the active/passive mechanism
         if (exst) then
          if ( debugLevel .GE. debLevB ) then
           write(msgbuf,'(a,a)')
     &      ' MDSREADFIELD_XZ_GL: opening file: ',dataFName(1:IL+13)
           call print_message( msgbuf, standardmessageunit,
     &                        SQUEEZE_RIGHT , mythid)
          endif
          length_of_rec=MDS_RECLEN( filePrec, sNx, mythid )
          open( dUnit, file=dataFName, status='old',
     &        access='direct', recl=length_of_rec )
          fileIsOpen=.TRUE.
         else
          fileIsOpen=.FALSE.
          write(msgbuf,'(a,a)')
     &      ' MDSREADFIELD_XZ_GL: filename: ',dataFName(1:IL+13)
          call print_message( msgbuf, standardmessageunit,
     &                        SQUEEZE_RIGHT , mythid)
          write(msgbuf,'(a)')
     &      ' MDSREADFIELD_XZ_GL: File does not exist'
          call print_error( msgbuf, mythid )
          stop 'ABNORMAL END: S/R MDSREADFIELD_GL'
         endif
        endif

        if (fileIsOpen) then
         do k=1,Nr
            iG = 0
            jG = 0
            irec=k + Nr*(irecord-1)
           if (filePrec .eq. precFloat32) then
            read(dUnit,rec=irec) r4seg
#ifdef _BYTESWAPIO
            call MDS_BYTESWAPR4( sNx, r4seg )
#endif
            if (arrType .eq. 'RS') then
#ifdef REAL4_IS_SLOW
             call MDS_SEG4toRS_2D(sNx,oLx,nNz,bi,bj,k,.TRUE.,r4seg,arr)
#endif
            elseif (arrType .eq. 'RL') then
             call MDS_SEG4toRL_2D(sNx,oLx,nNz,bi,bj,k,.TRUE.,r4seg,arr)
            else
             write(msgbuf,'(a)')
     &         ' MDSREADFIELD_XZ_GL: illegal value for arrType'
             call print_error( msgbuf, mythid )
             stop 'ABNORMAL END: S/R MDSREADFIELD_XZ_GL'
            endif
           elseif (filePrec .eq. precFloat64) then
            read(dUnit,rec=irec) r8seg
#ifdef _BYTESWAPIO
            call MDS_BYTESWAPR8( sNx, r8seg )
#endif
            if (arrType .eq. 'RS') then
#ifdef REAL4_IS_SLOW
             call MDS_SEG8toRS_2D(sNx,oLx,nNz,bi,bj,k,.TRUE.,r8seg,arr)
#endif
            elseif (arrType .eq. 'RL') then
             call MDS_SEG8toRL_2D(sNx,oLx,nNz,bi,bj,k,.TRUE.,r8seg,arr)
            else
             write(msgbuf,'(a)')
     &         ' MDSREADFIELD_XZ_GL: illegal value for arrType'
             call print_error( msgbuf, mythid )
             stop 'ABNORMAL END: S/R MDSREADFIELD_XZ_GL'
            endif
           else
            write(msgbuf,'(a)')
     &        ' MDSREADFIELD_XZ_GL: illegal value for filePrec'
            call print_error( msgbuf, mythid )
            stop 'ABNORMAL END: S/R MDSREADFIELD_XZ_GL'
           endif
       do ii=1,sNx
        arr_gl(ii,bi,ip,bj,jp,k)=arr(ii,k,bi,bj)
       enddo

C End of k loop
         enddo
         if (.NOT. globalFile) then
          close( dUnit )
          fileIsOpen = .FALSE.
         endif
        endif
C End of bi,bj loops
       enddo
      enddo
C End of ip,jp loops
       enddo
      enddo

C If global file was opened then close it
      if (fileIsOpen .AND. globalFile) then
       close( dUnit )
       fileIsOpen = .FALSE.
      endif

      _END_MASTER( myThid )

#else /* ALLOW_AUTODIFF */
      STOP 'ABNORMAL END: S/R MDSREADFIELD_XZ_GL is empty'
#endif /* ALLOW_AUTODIFF */
C     ------------------------------------------------------------------
      RETURN
      END

C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----|

      SUBROUTINE MDSREADFIELD_YZ_GL(
     I   fName,
     I   filePrec,
     I   arrType,
     I   nNz,
     O   arr_gl,
     I   irecord,
     I   myThid )

C Arguments:
C
C fName      string  :: base name for file to read
C filePrec   integer :: number of bits per word in file (32 or 64)
C arrType    char(2) :: declaration of "arr": either "RS" or "RL"
C nNz        integer :: size of third dimension: normally either 1 or Nr
C arr         RS/RL  :: array to read into, arr(:,:,nNz,:,:)
C irecord    integer :: record number to read
C myThid     integer :: thread identifier
C
C MDSREADFIELD first checks to see if the file "fName" exists, then
C if the file "fName.data" exists and finally the tiled files of the
C form "fName.xxx.yyy.data" exist. Currently, the meta-files are not
C read because it is difficult to parse files in fortran.
C The precision of the file is decsribed by filePrec, set either
C to floatPrec32 or floatPrec64. The precision or declaration of
C the array argument must be consistently described by the char*(2)
C string arrType, either "RS" or "RL". nNz allows for both 2-D and
C 3-D arrays to be handled. nNz=1 implies a 2-D model field and
C nNz=Nr implies a 3-D model field. irecord is the record number
C to be read and must be >= 1. The file data is stored in
C arr *but* the overlaps are *not* updated. ie. An exchange must
C be called. This is because the routine is sometimes called from
C within a MASTER_THID region.
C
C Created: 03/16/99 adcroft@mit.edu

      implicit none
C Global variables / common blocks
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"

C Routine arguments
      character*(*) fName
      integer filePrec
      character*(2) arrType
      integer nNz
      _RL arr_gl(nSx,nPx,sNy,nSy,nPy,Nr)
      integer irecord
      integer myThid

#ifdef ALLOW_AUTODIFF
C Functions
      integer ILNBLNK
      integer MDS_RECLEN
C Local variables
      character*(MAX_LEN_FNAM) dataFName
      integer ip,jp,iG,jG,irec,bi,bj,jj,k,dUnit,IL
      logical exst
      _RL arr(1-oLy:sNy+oLy,Nr,nSx,nSy)
      Real*4 r4seg(sNy)
      Real*8 r8seg(sNy)
      logical globalFile,fileIsOpen
      integer length_of_rec
      character*(max_len_mbuf) msgbuf
C     ------------------------------------------------------------------

C Only do I/O if I am the master thread
      _BEGIN_MASTER( myThid )

#ifndef REAL4_IS_SLOW
      if (arrType .eq. 'RS') then
       write(msgbuf,'(a)')
     &   ' MDSREADFIELD_YZ_GL is wrong for arrType="RS" (=real*4)'
       call print_error( msgbuf, mythid )
       stop 'ABNORMAL END: S/R MDSREADFIELD_YZ_GL'
      endif
#endif

C Record number must be >= 1
      if (irecord .LT. 1) then
       write(msgbuf,'(a,i9.8)')
     &   ' MDSREADFIELD_YZ_GL: argument irecord = ',irecord
       call print_message( msgbuf, standardmessageunit,
     &                     SQUEEZE_RIGHT , mythid)
       write(msgbuf,'(a)')
     &   ' MDSREADFIELD_YZ_GL: Invalid value for irecord'
       call print_error( msgbuf, mythid )
       stop 'ABNORMAL END: S/R MDSREADFIELD_YZ_GL'
      endif

C Assume nothing
      globalFile = .FALSE.
      fileIsOpen = .FALSE.
      IL=ILNBLNK( fName )

C Assign a free unit number as the I/O channel for this routine
      call MDSFINDUNIT( dUnit, mythid )

C Check first for global file with simple name (ie. fName)
      dataFName = fName
      inquire( file=dataFname, exist=exst )
      if (exst) then
       write(msgbuf,'(a,a)')
     &  ' MDSREADFIELD_YZ: opening global file: ',dataFName(1:IL)
       call print_message( msgbuf, standardmessageunit,
     &                     SQUEEZE_RIGHT , mythid)
      endif

C If negative check for global file with MDS name (ie. fName.data)
      if (.NOT. globalFile) then
       write(dataFname,'(2a)') fName(1:IL),'.data'
       inquire( file=dataFname, exist=exst )
       if (exst) then
        write(msgbuf,'(a,a)')
     &   ' MDSREADFIELD_YZ_GL: opening global file: ',dataFName(1:IL+5)
        call print_message( msgbuf, standardmessageunit,
     &                      SQUEEZE_RIGHT , mythid)
        globalFile = .TRUE.
       endif
      endif
C Loop over all processors
      do jp=1,nPy
      do ip=1,nPx
C Loop over all tiles
      do bj=1,nSy
      do bi=1,nSx
C If we are reading from a tiled MDS file then we open each one here
        if (.NOT. globalFile) then
         iG=bi+(ip-1)*nsx ! Kludge until unstructered tiles
         jG=bj+(jp-1)*nsy ! Kludge until unstructered tiles
         write(dataFname,'(2a,i3.3,a,i3.3,a)')
     &              fName(1:IL),'.',iG,'.',jG,'.data'
         inquire( file=dataFname, exist=exst )
C Of course, we only open the file if the tile is "active"
C (This is a place-holder for the active/passive mechanism
         if (exst) then
          if ( debugLevel .GE. debLevB ) then
           write(msgbuf,'(a,a)')
     &      ' MDSREADFIELD_YZ_GL: opening file: ',dataFName(1:IL+13)
           call print_message( msgbuf, standardmessageunit,
     &                        SQUEEZE_RIGHT , mythid)
          endif
          length_of_rec=MDS_RECLEN( filePrec, sNy, mythid )
          open( dUnit, file=dataFName, status='old',
     &        access='direct', recl=length_of_rec )
          fileIsOpen=.TRUE.
         else
          fileIsOpen=.FALSE.
          write(msgbuf,'(a,a)')
     &      ' MDSREADFIELD_YZ_GL: filename: ',dataFName(1:IL+13)
          call print_message( msgbuf, standardmessageunit,
     &                        SQUEEZE_RIGHT , mythid)
          write(msgbuf,'(a)')
     &      ' MDSREADFIELD_YZ_GL: File does not exist'
          call print_error( msgbuf, mythid )
          stop 'ABNORMAL END: S/R MDSREADFIELD_YZ_GL'
         endif
        endif

        if (fileIsOpen) then
         do k=1,Nr
            iG = 0
            jG = 0
            irec=k + Nr*(irecord-1)
           if (filePrec .eq. precFloat32) then
            read(dUnit,rec=irec) r4seg
#ifdef _BYTESWAPIO
            call MDS_BYTESWAPR4( sNy, r4seg )
#endif
            if (arrType .eq. 'RS') then
#ifdef REAL4_IS_SLOW
             call MDS_SEG4toRS_2D(sNy,oLy,nNz,bi,bj,k,.TRUE.,r4seg,arr)
#endif
            elseif (arrType .eq. 'RL') then
             call MDS_SEG4toRL_2D(sNy,oLy,nNz,bi,bj,k,.TRUE.,r4seg,arr)
            else
             write(msgbuf,'(a)')
     &         ' MDSREADFIELD_YZ_GL: illegal value for arrType'
             call print_error( msgbuf, mythid )
             stop 'ABNORMAL END: S/R MDSREADFIELD_YZ_GL'
            endif
           elseif (filePrec .eq. precFloat64) then
            read(dUnit,rec=irec) r8seg
#ifdef _BYTESWAPIO
            call MDS_BYTESWAPR8( sNy, r8seg )
#endif
            if (arrType .eq. 'RS') then
#ifdef REAL4_IS_SLOW
             call MDS_SEG8toRS_2D(sNy,oLy,nNz,bi,bj,k,.TRUE.,r8seg,arr)
#endif
            elseif (arrType .eq. 'RL') then
             call MDS_SEG8toRL_2D(sNy,oLy,nNz,bi,bj,k,.TRUE.,r8seg,arr)
            else
             write(msgbuf,'(a)')
     &         ' MDSREADFIELD_YZ_GL: illegal value for arrType'
             call print_error( msgbuf, mythid )
             stop 'ABNORMAL END: S/R MDSREADFIELD_YZ_GL'
            endif
           else
            write(msgbuf,'(a)')
     &        ' MDSREADFIELD_YZ_GL: illegal value for filePrec'
            call print_error( msgbuf, mythid )
            stop 'ABNORMAL END: S/R MDSREADFIELD_YZ_GL'
           endif
       do jj=1,sNy
        arr_gl(bi,ip,jj,bj,jp,k)=arr(jj,k,bi,bj)
       enddo

C End of k loop
         enddo
         if (.NOT. globalFile) then
          close( dUnit )
          fileIsOpen = .FALSE.
         endif
        endif
C End of bi,bj loops
       enddo
      enddo
C End of ip,jp loops
       enddo
      enddo

C If global file was opened then close it
      if (fileIsOpen .AND. globalFile) then
       close( dUnit )
       fileIsOpen = .FALSE.
      endif

      _END_MASTER( myThid )

#else /* ALLOW_AUTODIFF */
      STOP 'ABNORMAL END: S/R MDSREADFIELD_YZ_GL is empty'
#endif /* ALLOW_AUTODIFF */
C     ------------------------------------------------------------------
      RETURN
      END

C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----|

      SUBROUTINE MDSWRITEFIELD_XZ_GL(
     I   fName,
     I   filePrec,
     I   arrType,
     I   nNz,
     I   arr_gl,
     I   irecord,
     I   myIter,
     I   myThid )
C
C Arguments:
C
C fName      string  :: base name for file to write
C filePrec   integer :: number of bits per word in file (32 or 64)
C arrType    char(2) :: declaration of "arr": either "RS" or "RL"
C nNz        integer :: size of third dimension: normally either 1 or Nr
C arr         RS/RL  :: array to write, arr(:,:,nNz,:,:)
C irecord    integer :: record number to write
C myIter     integer :: time step number
C myThid     integer :: thread identifier
C
C MDSWRITEFIELD creates either a file of the form "fName.data" and
C "fName.meta" if the logical flag "globalFile" is set true. Otherwise
C it creates MDS tiled files of the form "fName.xxx.yyy.data" and
C "fName.xxx.yyy.meta". A meta-file is always created.
C Currently, the meta-files are not read because it is difficult
C to parse files in fortran. We should read meta information before
C adding records to an existing multi-record file.
C The precision of the file is decsribed by filePrec, set either
C to floatPrec32 or floatPrec64. The precision or declaration of
C the array argument must be consistently described by the char*(2)
C string arrType, either "RS" or "RL". nNz allows for both 2-D and
C 3-D arrays to be handled. nNz=1 implies a 2-D model field and
C nNz=Nr implies a 3-D model field. irecord is the record number
C to be read and must be >= 1. NOTE: It is currently assumed that
C the highest record number in the file was the last record written.
C Nor is there a consistency check between the routine arguments and file.
C ie. if your write record 2 after record 4 the meta information
C will record the number of records to be 2. This, again, is because
C we have read the meta information. To be fixed.
C
C Created: 03/16/99 adcroft@mit.edu
C
C Changed: 05/31/00 heimbach@mit.edu
C          open(dUnit, ..., status='old', ... -> status='unknown'

      implicit none
C Global variables / common blocks
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"

C Routine arguments
      character*(*) fName
      integer filePrec
      character*(2) arrType
      integer nNz
cph(
cph      Real arr(*)
      _RL arr_gl(sNx,nSx,nPx,nSy,nPy,Nr)
cph)
      integer irecord
      integer myIter
      integer myThid

#ifdef ALLOW_AUTODIFF
C Functions
      integer ILNBLNK
      integer MDS_RECLEN
C Local variables
      character*(MAX_LEN_FNAM) dataFName,metaFName
      integer ip,jp,iG,jG,irec,bi,bj,ii,k,dUnit,IL
      Real*4 r4seg(sNx)
      Real*8 r8seg(sNx)
      _RL arr(1-oLx:sNx+oLx,Nr,nSx,nSy)
      INTEGER dimList(3,3), nDims, map2gl(2)
      _RL dummyRL(1)
      CHARACTER*8 blank8c
      integer length_of_rec
      logical fileIsOpen
      character*(max_len_mbuf) msgbuf
C     ------------------------------------------------------------------

      DATA dummyRL(1) / 0. _d 0 /
      DATA blank8c / '        ' /

C Only do I/O if I am the master thread
      _BEGIN_MASTER( myThid )

#ifndef REAL4_IS_SLOW
      if (arrType .eq. 'RS') then
       write(msgbuf,'(a)')
     &   ' MDSWRITEFIELD_XZ_GL is wrong for arrType="RS" (=real*4)'
       call print_error( msgbuf, mythid )
       stop 'ABNORMAL END: S/R MDSWRITEFIELD_XZ_GL'
      endif
#endif

C Record number must be >= 1
      if (irecord .LT. 1) then
       write(msgbuf,'(a,i9.8)')
     &   ' MDSWRITEFIELD_XZ_GL: argument irecord = ',irecord
       call print_message( msgbuf, standardmessageunit,
     &                     SQUEEZE_RIGHT , mythid)
       write(msgbuf,'(a)')
     &   ' MDSWRITEFIELD_XZ_GL: invalid value for irecord'
       call print_error( msgbuf, mythid )
       stop 'ABNORMAL END: S/R MDSWRITEFIELD_XZ_GL'
      endif

C Assume nothing
      fileIsOpen=.FALSE.
      IL=ILNBLNK( fName )

C Assign a free unit number as the I/O channel for this routine
      call MDSFINDUNIT( dUnit, mythid )


C Loop over all processors
      do jp=1,nPy
      do ip=1,nPx
C Loop over all tiles
      do bj=1,nSy
       do bi=1,nSx
C If we are writing to a tiled MDS file then we open each one here
         iG=bi+(ip-1)*nsx ! Kludge until unstructered tiles
         jG=bj+(jp-1)*nsy ! Kludge until unstructered tiles
         write(dataFname,'(2a,i3.3,a,i3.3,a)')
     &              fName(1:IL),'.',iG,'.',jG,'.data'
         if (irecord .EQ. 1) then
          length_of_rec=MDS_RECLEN( filePrec, sNx, mythid )
          open( dUnit, file=dataFName, status=_NEW_STATUS,
     &       access='direct', recl=length_of_rec )
          fileIsOpen=.TRUE.
         else
          length_of_rec=MDS_RECLEN( filePrec, sNx, mythid )
          open( dUnit, file=dataFName, status=_OLD_STATUS,
     &       access='direct', recl=length_of_rec )
          fileIsOpen=.TRUE.
         endif
        if (fileIsOpen) then
         do k=1,Nr
            do ii=1,sNx
               arr(ii,k,bi,bj)=arr_gl(ii,bi,ip,bj,jp,k)
            enddo
            iG = 0
            jG = 0
            irec=k + Nr*(irecord-1)
           if (filePrec .eq. precFloat32) then
            if (arrType .eq. 'RS') then
#ifdef REAL4_IS_SLOW
             call MDS_SEG4toRS_2D(sNx,oLx,nNz,bi,bj,k,.FALSE.,r4seg,arr)
#endif
            elseif (arrType .eq. 'RL') then
             call MDS_SEG4toRL_2D(sNx,oLx,nNz,bi,bj,k,.FALSE.,r4seg,arr)
            else
             write(msgbuf,'(a)')
     &         ' MDSWRITEFIELD_XZ_GL: illegal value for arrType'
             call print_error( msgbuf, mythid )
             stop 'ABNORMAL END: S/R MDSWRITEFIELD_XZ_GL'
            endif
#ifdef _BYTESWAPIO
            call MDS_BYTESWAPR4( sNx, r4seg )
#endif
            write(dUnit,rec=irec) r4seg
           elseif (filePrec .eq. precFloat64) then
            if (arrType .eq. 'RS') then
#ifdef REAL4_IS_SLOW
             call MDS_SEG8toRS_2D(sNx,oLx,nNz,bi,bj,k,.FALSE.,r8seg,arr)
#endif
            elseif (arrType .eq. 'RL') then
             call MDS_SEG8toRL_2D(sNx,oLx,nNz,bi,bj,k,.FALSE.,r8seg,arr)
            else
             write(msgbuf,'(a)')
     &         ' MDSWRITEFIELD_XZ_GL: illegal value for arrType'
             call print_error( msgbuf, mythid )
             stop 'ABNORMAL END: S/R MDSWRITEFIELD_XZ_GL'
            endif
#ifdef _BYTESWAPIO
            call MDS_BYTESWAPR8( sNx, r8seg )
#endif
            write(dUnit,rec=irec) r8seg
           else
            write(msgbuf,'(a)')
     &        ' MDSWRITEFIELD_XZ_GL: illegal value for filePrec'
            call print_error( msgbuf, mythid )
            stop 'ABNORMAL END: S/R MDSWRITEFIELD_XZ_GL'
           endif
C End of k loop
         enddo
        else
         write(msgbuf,'(a)')
     &     ' MDSWRITEFIELD_XZ_GL: I should never get to this point'
         call print_error( msgbuf, mythid )
         stop 'ABNORMAL END: S/R MDSWRITEFIELD_XZ_GL'
        endif
C If we were writing to a tiled MDS file then we close it here
        if (fileIsOpen) then
         close( dUnit )
         fileIsOpen = .FALSE.
        endif
C Create meta-file for each tile if we are tiling
         iG=bi+(ip-1)*nsx ! Kludge until unstructered tiles
         jG=bj+(jp-1)*nsy ! Kludge until unstructered tiles
         write(metaFname,'(2a,i3.3,a,i3.3,a)')
     &              fName(1:IL),'.',iG,'.',jG,'.meta'
         dimList(1,1)=Nx
         dimList(2,1)=((ip-1)*nSx+(bi-1))*sNx+1
         dimList(3,1)=((ip-1)*nSx+bi)*sNx
         dimList(1,2)=nSy*nPy
         dimList(2,2)=(jp-1)*nSy+bj
         dimList(3,2)= jp*nSy+bj
         dimList(1,3)=Nr
         dimList(2,3)=1
         dimList(3,3)=Nr
         nDims=3
         if (Nr .EQ. 1) nDims=2
         map2gl(1) = 0
         map2gl(2) = 1
         CALL MDS_WRITE_META(
     I              metaFName, dataFName, the_run_name, ' ',
     I              filePrec, nDims, dimList, map2gl, 0, blank8c,
     I              0, dummyRL, oneRL, irecord, myIter, myThid )
C End of bi,bj loops
       enddo
      enddo
C End of ip,jp loops
       enddo
      enddo

      _END_MASTER( myThid )

#else /* ALLOW_AUTODIFF */
      STOP 'ABNORMAL END: S/R MDSWRITEFIELD_XZ_GL is empty'
#endif /* ALLOW_AUTODIFF */
C     ------------------------------------------------------------------
      RETURN
      END

C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----|

      SUBROUTINE MDSWRITEFIELD_YZ_GL(
     I   fName,
     I   filePrec,
     I   arrType,
     I   nNz,
     I   arr_gl,
     I   irecord,
     I   myIter,
     I   myThid )
C
C Arguments:
C
C fName      string  :: base name for file to write
C filePrec   integer :: number of bits per word in file (32 or 64)
C arrType    char(2) :: declaration of "arr": either "RS" or "RL"
C nNz        integer :: size of third dimension: normally either 1 or Nr
C arr         RS/RL  :: array to write, arr(:,:,nNz,:,:)
C irecord    integer :: record number to write
C myIter     integer :: time step number
C myThid     integer :: thread identifier
C
C MDSWRITEFIELD creates either a file of the form "fName.data" and
C "fName.meta" if the logical flag "globalFile" is set true. Otherwise
C it creates MDS tiled files of the form "fName.xxx.yyy.data" and
C "fName.xxx.yyy.meta". A meta-file is always created.
C Currently, the meta-files are not read because it is difficult
C to parse files in fortran. We should read meta information before
C adding records to an existing multi-record file.
C The precision of the file is decsribed by filePrec, set either
C to floatPrec32 or floatPrec64. The precision or declaration of
C the array argument must be consistently described by the char*(2)
C string arrType, either "RS" or "RL". nNz allows for both 2-D and
C 3-D arrays to be handled. nNz=1 implies a 2-D model field and
C nNz=Nr implies a 3-D model field. irecord is the record number
C to be read and must be >= 1. NOTE: It is currently assumed that
C the highest record number in the file was the last record written.
C Nor is there a consistency check between the routine arguments and file.
C ie. if your write record 2 after record 4 the meta information
C will record the number of records to be 2. This, again, is because
C we have read the meta information. To be fixed.
C
C Created: 03/16/99 adcroft@mit.edu
C
C Changed: 05/31/00 heimbach@mit.edu
C          open(dUnit, ..., status='old', ... -> status='unknown'

      implicit none
C Global variables / common blocks
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"

C Routine arguments
      character*(*) fName
      integer filePrec
      character*(2) arrType
      integer nNz
cph(
cph      Real arr(*)
      _RL arr_gl(nSx,nPx,sNy,nSy,nPy,Nr)
cph)
      integer irecord
      integer myIter
      integer myThid

#ifdef ALLOW_AUTODIFF
C Functions
      integer ILNBLNK
      integer MDS_RECLEN
C Local variables
      character*(MAX_LEN_FNAM) dataFName,metaFName
      integer ip,jp,iG,jG,irec,bi,bj,jj,k,dUnit,IL
      Real*4 r4seg(sNy)
      Real*8 r8seg(sNy)
      _RL arr(1-oLy:sNy+oLy,Nr,nSx,nSy)
      INTEGER dimList(3,3), nDims, map2gl(2)
      _RL dummyRL(1)
      CHARACTER*8 blank8c
      integer length_of_rec
      logical fileIsOpen
      character*(max_len_mbuf) msgbuf
C     ------------------------------------------------------------------

      DATA dummyRL(1) / 0. _d 0 /
      DATA blank8c / '        ' /

C Only do I/O if I am the master thread
      _BEGIN_MASTER( myThid )

#ifndef REAL4_IS_SLOW
      if (arrType .eq. 'RS') then
       write(msgbuf,'(a)')
     &   ' MDSWRITEFIELD_YZ_GL is wrong for arrType="RS" (=real*4)'
       call print_error( msgbuf, mythid )
       stop 'ABNORMAL END: S/R MDSWRITEFIELD_YZ_GL'
      endif
#endif

C Record number must be >= 1
      if (irecord .LT. 1) then
       write(msgbuf,'(a,i9.8)')
     &   ' MDSWRITEFIELD_YZ_GL: argument irecord = ',irecord
       call print_message( msgbuf, standardmessageunit,
     &                     SQUEEZE_RIGHT , mythid)
       write(msgbuf,'(a)')
     &   ' MDSWRITEFIELD_YZ_GL: invalid value for irecord'
       call print_error( msgbuf, mythid )
       stop 'ABNORMAL END: S/R MDSWRITEFIELD_YZ_GL'
      endif

C Assume nothing
      fileIsOpen=.FALSE.
      IL=ILNBLNK( fName )

C Assign a free unit number as the I/O channel for this routine
      call MDSFINDUNIT( dUnit, mythid )


C Loop over all processors
      do jp=1,nPy
      do ip=1,nPx
C Loop over all tiles
      do bj=1,nSy
       do bi=1,nSx
C If we are writing to a tiled MDS file then we open each one here
         iG=bi+(ip-1)*nsx ! Kludge until unstructered tiles
         jG=bj+(jp-1)*nsy ! Kludge until unstructered tiles
         write(dataFname,'(2a,i3.3,a,i3.3,a)')
     &              fName(1:IL),'.',iG,'.',jG,'.data'
         if (irecord .EQ. 1) then
          length_of_rec=MDS_RECLEN( filePrec, sNy, mythid )
          open( dUnit, file=dataFName, status=_NEW_STATUS,
     &       access='direct', recl=length_of_rec )
          fileIsOpen=.TRUE.
         else
          length_of_rec=MDS_RECLEN( filePrec, sNy, mythid )
          open( dUnit, file=dataFName, status=_OLD_STATUS,
     &       access='direct', recl=length_of_rec )
          fileIsOpen=.TRUE.
         endif
        if (fileIsOpen) then
         do k=1,Nr
            do jj=1,sNy
               arr(jj,k,bi,bj)=arr_gl(bi,ip,jj,bj,jp,k)
            enddo
            iG = 0
            jG = 0
            irec=k + Nr*(irecord-1)
           if (filePrec .eq. precFloat32) then
            if (arrType .eq. 'RS') then
#ifdef REAL4_IS_SLOW
             call MDS_SEG4toRS_2D(sNy,oLy,nNz,bi,bj,k,.FALSE.,r4seg,arr)
#endif
            elseif (arrType .eq. 'RL') then
             call MDS_SEG4toRL_2D(sNy,oLy,nNz,bi,bj,k,.FALSE.,r4seg,arr)
            else
             write(msgbuf,'(a)')
     &         ' MDSWRITEFIELD_YZ_GL: illegal value for arrType'
             call print_error( msgbuf, mythid )
             stop 'ABNORMAL END: S/R MDSWRITEFIELD_YZ_GL'
            endif
#ifdef _BYTESWAPIO
            call MDS_BYTESWAPR4( sNy, r4seg )
#endif
            write(dUnit,rec=irec) r4seg
           elseif (filePrec .eq. precFloat64) then
            if (arrType .eq. 'RS') then
#ifdef REAL4_IS_SLOW
             call MDS_SEG8toRS_2D(sNy,oLy,nNz,bi,bj,k,.FALSE.,r8seg,arr)
#endif
            elseif (arrType .eq. 'RL') then
             call MDS_SEG8toRL_2D(sNy,oLy,nNz,bi,bj,k,.FALSE.,r8seg,arr)
            else
             write(msgbuf,'(a)')
     &         ' MDSWRITEFIELD_YZ_GL: illegal value for arrType'
             call print_error( msgbuf, mythid )
             stop 'ABNORMAL END: S/R MDSWRITEFIELD_YZ_GL'
            endif
#ifdef _BYTESWAPIO
            call MDS_BYTESWAPR8( sNy, r8seg )
#endif
            write(dUnit,rec=irec) r8seg
           else
            write(msgbuf,'(a)')
     &        ' MDSWRITEFIELD_YZ_GL: illegal value for filePrec'
            call print_error( msgbuf, mythid )
            stop 'ABNORMAL END: S/R MDSWRITEFIELD_YZ_GL'
           endif
C End of k loop
         enddo
        else
         write(msgbuf,'(a)')
     &     ' MDSWRITEFIELD_YZ_GL: I should never get to this point'
         call print_error( msgbuf, mythid )
         stop 'ABNORMAL END: S/R MDSWRITEFIELD_YZ_GL'
        endif
C If we were writing to a tiled MDS file then we close it here
        if (fileIsOpen) then
         close( dUnit )
         fileIsOpen = .FALSE.
        endif
C Create meta-file for each tile if we are tiling
         iG=bi+(ip-1)*nsx ! Kludge until unstructered tiles
         jG=bj+(jp-1)*nsy ! Kludge until unstructered tiles
         write(metaFname,'(2a,i3.3,a,i3.3,a)')
     &              fName(1:IL),'.',iG,'.',jG,'.meta'
         dimList(1,1)=Nx
         dimList(2,1)=(ip-1)*nSx+bi
         dimList(3,1)=ip*nSx+bi
         dimList(1,2)=Ny
         dimList(2,2)=((jp-1)*nSy+(bj-1))*sNy+1
         dimList(3,2)=((jp-1)*nSy+bj)*sNy
         dimList(1,3)=Nr
         dimList(2,3)=1
         dimList(3,3)=Nr
         nDims=3
         if (Nr .EQ. 1) nDims=2
         map2gl(1) = 0
         map2gl(2) = 1
         CALL MDS_WRITE_META(
     I              metaFName, dataFName, the_run_name, ' ',
     I              filePrec, nDims, dimList, map2gl, 0, blank8c,
     I              0, dummyRL, oneRL, irecord, myIter, myThid )
C End of bi,bj loops
       enddo
      enddo
C End of ip,jp loops
       enddo
      enddo

      _END_MASTER( myThid )

#else /* ALLOW_AUTODIFF */
      STOP 'ABNORMAL END: S/R MDSWRITEFIELD_YZ_GL is empty'
#endif /* ALLOW_AUTODIFF */
C     ------------------------------------------------------------------
      RETURN
      END