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C $Header: /u/gcmpack/MITgcm/pkg/mdsio/mdsio_readvector.F,v 1.15 2009/09/01 19:00:15 jmc Exp $ |
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C $Name: $ |
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|
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#include "MDSIO_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: MDS_READ_TAPE |
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C !INTERFACE: |
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SUBROUTINE MDS_READ_TAPE( |
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I fName, |
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I filePrec, |
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I arrType, |
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I nSize, |
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O fldR8, fldR4, |
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I singleCpuIO, |
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I iRec, |
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I myThid ) |
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|
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C !DESCRIPTION: |
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C MDS_READ_TAPE: load an array (treated as vector) for a tape-file |
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C (renamed from MDSREADVECTOR with 2 explicit output array typest) |
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C |
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C Arguments: |
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C fName string :: base name for file to read |
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C filePrec integer :: number of bits per word in file (32 or 64) |
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C arrType char(2) :: which array (fldR8/R4) to read, either "R8" or "R4" |
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C nSize integer :: number of elements of input array "fldR8/R4" to read |
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C fldR8 ( R8 ) :: array to read if arrType="R8", fldR8(nSize) |
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C fldR4 ( R4 ) :: array to read if arrType="R4", fldR4(nSize) |
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C singleCpuIO ( L ) :: only proc 0 do IO and send data to other procs |
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C iRec integer :: record number to read |
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C myThid integer :: my Thread Id number |
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|
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C !USES: |
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IMPLICIT NONE |
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|
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C-- Global variables -- |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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CHARACTER*(*) fName |
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INTEGER filePrec |
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CHARACTER*(2) arrType |
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INTEGER nSize |
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_R8 fldR8(*) |
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_R4 fldR4(*) |
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LOGICAL singleCpuIO |
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INTEGER iRec |
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INTEGER myThid |
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|
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#ifdef ALLOW_AUTODIFF |
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|
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C !FUNCTIONS: |
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INTEGER ILNBLNK |
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INTEGER MDS_RECLEN |
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EXTERNAL ILNBLNK |
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EXTERNAL MDS_RECLEN |
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|
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C !LOCAL VARIABLES: |
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CHARACTER*(MAX_LEN_FNAM) dataFName, pfName |
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INTEGER iG, jG, jRec, dUnit, IL, pIL |
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LOGICAL exst |
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LOGICAL globalFile, fileIsOpen |
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INTEGER length_of_rec |
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CHARACTER*(MAX_LEN_MBUF) msgBuf |
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|
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C simple implementation of singleCpuIO without any specific EXCH2 |
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C feature (should work as long as reading and writing match) |
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INTEGER j |
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INTEGER vec_size |
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C Note: would be better to use explicit (allocate/delocate) dynamical |
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C allocation instead of this implicit form: |
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_R8 gl_buffer_r8(nSize*nPx*nPy) |
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_R4 gl_buffer_r4(nSize*nPx*nPy) |
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_R8 local_r8 (nSize) |
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_R4 local_r4 (nSize) |
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CEOP |
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|
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vec_size = nSize*nPx*nPy |
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|
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C-- Only do I/O if I am the master thread |
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_BEGIN_MASTER( myThid ) |
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|
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C- Record number must be >= 1 |
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IF ( iRec.LT.1 ) THEN |
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WRITE(msgBuf,'(A,I10)') |
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& ' MDS_READ_TAPE: argument iRec =',iRec |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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WRITE(msgBuf,'(A)') |
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& ' MDS_READ_TAPE: invalid value for iRec' |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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STOP 'ABNORMAL END: S/R MDS_READ_TAPE' |
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ENDIF |
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|
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C- Assume nothing |
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globalFile = .FALSE. |
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fileIsOpen = .FALSE. |
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IL = ILNBLNK( fName ) |
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pIL = ILNBLNK( mdsioLocalDir ) |
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|
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C- Assign special directory |
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IF ( mdsioLocalDir .NE. ' ' ) THEN |
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WRITE(pfName,'(2A)') mdsioLocalDir(1:pIL), fName(1:IL) |
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ELSE |
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pfName = fName |
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ENDIF |
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pIL = ILNBLNK( pfName ) |
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|
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C- Assign a free unit number as the I/O channel for this routine |
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CALL MDSFINDUNIT( dUnit, myThid ) |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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IF ( singleCpuIO ) THEN |
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|
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IF ( myProcId .EQ. 0 ) THEN |
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C-- Master thread of process 0, only, opens a global file |
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|
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C- Check first for global file with with MDS name (ie. fName.data) |
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WRITE(dataFName,'(2A)') fName(1:IL),'.data' |
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INQUIRE( file=dataFName, exist=exst ) |
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IF (exst) globalFile = .TRUE. |
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|
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C- If global file is visible to process 0, then open it here. |
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IF ( globalFile ) THEN |
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IF ( debugLevel .GE. debLevB ) THEN |
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WRITE(msgBuf,'(A,A)') |
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& ' MDS_READ_TAPE: opening global file: ',dataFName(1:IL+5) |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT, myThid ) |
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ENDIF |
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length_of_rec = MDS_RECLEN( filePrec, vec_size, myThid ) |
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OPEN( dUnit, file=dataFName, status='old', |
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& access='direct', recl=length_of_rec ) |
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ELSE |
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C Otherwise stop program. |
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WRITE(msgBuf,'(2A)') |
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& ' MDS_READ_TAPE: filename: ',dataFName(1:IL) |
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C-jmc: why double print (stdout + stderr) ? |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT, myThid ) |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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WRITE(msgBuf,'(A)') |
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& ' MDS_READ_TAPE: File does not exist' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT, myThid ) |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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STOP 'ABNORMAL END: S/R MDS_READ_TAPE' |
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ENDIF |
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|
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C- Read into global buffer: |
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IF ( filePrec.EQ.precFloat32 ) THEN |
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READ(dUnit,rec=iRec) gl_buffer_r4 |
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#ifdef _BYTESWAPIO |
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CALL MDS_BYTESWAPR4( vec_size, gl_buffer_r4 ) |
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#endif |
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ELSEIF ( filePrec.EQ.precFloat64 ) THEN |
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READ(dUnit,rec=iRec) gl_buffer_r8 |
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#ifdef _BYTESWAPIO |
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CALL MDS_BYTESWAPR8( vec_size, gl_buffer_r8 ) |
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#endif |
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ENDIF |
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|
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C- Close data-file |
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CLOSE( dUnit ) |
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|
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C-- end if myProcId=0 |
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ENDIF |
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|
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IF ( filePrec.EQ.precFloat32 ) THEN |
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CALL SCATTER_VEC_R4( gl_buffer_r4, local_r4, nSize, myThid ) |
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ELSEIF ( filePrec.EQ.precFloat64 ) THEN |
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CALL SCATTER_VEC_R8( gl_buffer_r8, local_r8, nSize, myThid ) |
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ELSE |
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WRITE(msgBuf,'(A)') |
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& ' MDS_READ_TAPE: illegal value for filePrec' |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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STOP 'ABNORMAL END: S/R MDS_READ_TAPE' |
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ENDIF |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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C if ( singleCpuIO ), else |
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ELSEIF ( .NOT. singleCpuIO ) THEN |
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|
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C- Check first for global file with with MDS name (ie. fName.data) |
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WRITE(dataFName,'(2A)') fName(1:IL),'.data' |
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INQUIRE( file=dataFName, exist=exst ) |
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IF (exst) THEN |
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IF ( debugLevel .GE. debLevB ) THEN |
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WRITE(msgBuf,'(A,A)') |
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& ' MDS_READ_TAPE: opening global file: ',dataFName(1:IL+5) |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT, myThid ) |
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ENDIF |
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globalFile = .TRUE. |
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C- And open it here |
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length_of_rec = MDS_RECLEN( filePrec, nSize, myThid ) |
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OPEN( dUnit, file=dataFName, status='old', |
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& access='direct', recl=length_of_rec ) |
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fileIsOpen=.TRUE. |
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ENDIF |
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|
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C- If we are reading from a tiled MDS file then we open each one here |
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IF ( .NOT.globalFile ) THEN |
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iG = 1 + (myXGlobalLo-1)/sNx |
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jG = 1 + (myYGlobalLo-1)/sNy |
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WRITE(dataFName,'(2A,I3.3,A,I3.3,A)') |
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& pfName(1:pIL),'.',iG,'.',jG,'.data' |
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INQUIRE( file=dataFName, exist=exst ) |
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IF (exst) THEN |
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IF ( debugLevel .GE. debLevB ) THEN |
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WRITE(msgBuf,'(A,A)') |
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& ' MDS_READ_TAPE: opening file: ',dataFName(1:pIL+13) |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT, myThid ) |
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ENDIF |
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length_of_rec = MDS_RECLEN( filePrec, nSize, myThid ) |
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OPEN( dUnit, file=dataFName, status='old', |
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& access='direct', recl=length_of_rec ) |
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fileIsOpen=.TRUE. |
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ELSE |
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fileIsOpen=.FALSE. |
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WRITE(msgBuf,'(4A)') |
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& ' MDS_READ_TAPE: missing file: ',fName(1:IL), |
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& ' , ',dataFName(1:pIL+13) |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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STOP 'ABNORMAL END: S/R MDS_READ_TAPE' |
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ENDIF |
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ENDIF |
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|
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IF ( fileIsOpen ) THEN |
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IF ( globalFile ) THEN |
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C- read the same way it was written: |
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jRec = 1 + myProcId + (iRec-1)*nPx*nPy |
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ELSE |
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jRec = iRec |
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ENDIF |
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IF ( filePrec.EQ.precFloat32 ) THEN |
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READ(dUnit,rec=jRec) local_r4 |
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#ifdef _BYTESWAPIO |
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CALL MDS_BYTESWAPR4( nSize, local_r4 ) |
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#endif |
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ELSEIF ( filePrec.EQ.precFloat64 ) THEN |
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READ(dUnit,rec=jRec) local_r8 |
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#ifdef _BYTESWAPIO |
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CALL MDS_BYTESWAPR8( nSize, local_r8 ) |
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#endif |
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ELSE |
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WRITE(msgBuf,'(A)') |
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& ' MDS_READ_TAPE: illegal value for filePrec' |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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STOP 'ABNORMAL END: S/R MDS_READ_TAPE' |
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ENDIF |
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C-- If file was opened then close it |
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CLOSE( dUnit ) |
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fileIsOpen = .FALSE. |
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ENDIF |
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|
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C end-if ( .not. singleCpuIO ) |
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ENDIF |
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|
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_END_MASTER( myThid ) |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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C-- Copy local buffer into output array |
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IF ( arrType.EQ.'R4' ) THEN |
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IF ( filePrec.EQ.precFloat32 ) THEN |
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DO j=1,nSize |
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fldR4(j) = local_r4(j) |
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ENDDO |
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ELSE |
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DO j=1,nSize |
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fldR4(j) = local_r8(j) |
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ENDDO |
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ENDIF |
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ELSEIF ( arrType.EQ.'R8' ) THEN |
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IF ( filePrec.EQ.precFloat32 ) THEN |
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DO j=1,nSize |
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fldR8(j) = local_r4(j) |
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ENDDO |
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ELSE |
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DO j=1,nSize |
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fldR8(j) = local_r8(j) |
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ENDDO |
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ENDIF |
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ELSE |
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WRITE(msgBuf,'(A)') |
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& ' MDS_READ_TAPE: illegal value for arrType' |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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STOP 'ABNORMAL END: S/R MDS_READ_TAPE' |
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ENDIF |
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|
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#else /* ALLOW_AUTODIFF */ |
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STOP 'ABNORMAL END: S/R MDS_READ_TAPE is empty' |
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#endif /* ALLOW_AUTODIFF */ |
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|
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RETURN |
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END |
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