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C $Header: /u/gcmpack/MITgcm/pkg/mdsio/mdsio_read_field.F,v 1.3 2007/11/13 19:37:44 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_FIELD |
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C !INTERFACE: |
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SUBROUTINE MDS_READ_FIELD( |
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I fName, |
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I filePrec, |
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I useCurrentDir, |
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I arrType, |
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I kSize,kLo,kHi, |
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O arr, |
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I irecord, |
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I myThid ) |
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|
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C !DESCRIPTION: |
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C Arguments: |
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C |
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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 useCurrentDir(logic):: always read from the current directory (even if |
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C "mdsioLocalDir" is set) |
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C arrType (char(2)) :: declaration of "arr": either "RS" or "RL" |
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C kSize (integer) :: size of third dimension: normally either 1 or Nr |
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C kLo (integer) :: 1rst vertical level (of array "arr") to read-in |
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C kHi (integer) :: last vertical level (of array "arr") to read-in |
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C arr ( RS/RL ) :: array to read into, arr(:,:,kSize,:,:) |
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C irecord (integer) :: record number to read |
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C myIter (integer) :: time step number |
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C myThid (integer) :: thread identifier |
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C |
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C MDS_READ_FIELD first checks to see IF the file "fName" exists, then |
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C IF the file "fName.data" exists and finally the tiled files of the |
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C form "fName.xxx.yyy.data" exist. Currently, the meta-files are not |
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C read because it is difficult to parse files in fortran. |
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C The precision of the file is decsribed by filePrec, set either |
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C to floatPrec32 or floatPrec64. The precision or declaration of |
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C the array argument must be consistently described by the char*(2) |
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C string arrType, either "RS" or "RL". |
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C (kSize,kLo,kHi) allows for both 2-D and 3-D arrays to be handled, with |
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C the option to only read and fill-in a sub-set of consecutive vertical |
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C levels (from kLo to kHi) ; (kSize,kLo,kHi)=(1,1,1) implies a 2-D model |
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C field and (kSize,kLo,kHi)=(Nr,1,Nr) implies a 3-D model field. |
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C irecord is the record number to be read and must be >= 1. |
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C The file data is stored in arr *but* the overlaps are *not* updated, |
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C i.e., an exchange must be called. This is because the routine is |
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C sometimes called from within a MASTER_THID region. |
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C |
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C Created: 03/16/99 adcroft@mit.edu |
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CEOP |
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|
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C !USES: |
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IMPLICIT NONE |
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C Global variables / common blocks |
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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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#include "EESUPPORT.h" |
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#ifdef ALLOW_EXCH2 |
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#include "W2_EXCH2_TOPOLOGY.h" |
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#include "W2_EXCH2_PARAMS.h" |
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#endif /* ALLOW_EXCH2 */ |
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#include "MDSIO_SCPU.h" |
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|
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C !INPUT PARAMETERS: |
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CHARACTER*(*) fName |
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INTEGER filePrec |
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LOGICAL useCurrentDir |
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CHARACTER*(2) arrType |
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INTEGER kSize, kLo, kHi |
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INTEGER irecord |
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INTEGER myThid |
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C !OUTPUT PARAMETERS: |
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Real arr(*) |
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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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LOGICAL MASTER_CPU_IO |
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EXTERNAL ILNBLNK |
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EXTERNAL MDS_RECLEN |
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EXTERNAL MASTER_CPU_IO |
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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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CHARACTER*(MAX_LEN_MBUF) msgBuf |
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LOGICAL exst |
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LOGICAL globalFile, fileIsOpen |
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LOGICAL iAmDoingIO |
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INTEGER iG,jG,bi,bj,i,j,k,nNz |
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INTEGER irec,dUnit,IL,pIL |
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INTEGER length_of_rec |
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#if defined(ALLOW_EXCH2) && !defined(MISSING_TILE_IO) |
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INTEGER iG_IO,jG_IO,npe, loc_xGlobalLo, loc_yGlobalLo |
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#endif |
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Real*4 r4seg(sNx) |
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Real*8 r8seg(sNx) |
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#ifdef ALLOW_EXCH2 |
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INTEGER iGjLoc, jGjLoc |
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c INTEGER tGy,tGx,tNy,tNx,tN |
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INTEGER tGy,tGx, tNx,tN |
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#endif /* ALLOW_EXCH2 */ |
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INTEGER tNy |
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|
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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 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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nNz = 1 + kHi - kLo |
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|
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C Only do I/O if I am the master thread (and mpi process 0 IF useSingleCpuIO): |
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iAmDoingIO = MASTER_CPU_IO(myThid) |
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|
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C Only do I/O if I am the master thread |
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IF ( iAmDoingIO ) THEN |
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|
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C Record number must be >= 1 |
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IF (irecord .LT. 1) THEN |
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WRITE(msgBuf,'(A,I9.8)') |
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& ' MDS_READ_FIELD: argument irecord = ',irecord |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , myThid) |
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WRITE(msgBuf,'(A)') |
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& ' MDS_READ_FIELD: Invalid value for irecord' |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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STOP 'ABNORMAL END: S/R MDS_READ_FIELD' |
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ENDIF |
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C check for valid sub-set of levels: |
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IF ( kLo.LT.1 .OR. kHi.GT.kSize ) THEN |
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WRITE(msgBuf,'(3(A,I6))') |
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& ' MDS_READ_FIELD: arguments kSize=', kSize, |
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& ' , kLo=', kLo, ' , kHi=', kHi |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , myThid) |
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WRITE(msgBuf,'(A)') |
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& ' MDS_READ_FIELD: invalid sub-set of levels' |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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STOP 'ABNORMAL END: S/R MDS_READ_FIELD' |
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ENDIF |
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|
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C Assign special directory |
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IF ( useCurrentDir .OR. pIL.EQ.0 ) THEN |
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pfName= fName |
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ELSE |
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WRITE(pfName,'(2a)') mdsioLocalDir(1:pIL), fName(1:IL) |
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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 Check first for global file with simple name (ie. fName) |
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dataFName = fName |
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INQUIRE( file=dataFName, exist=exst ) |
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IF (exst) THEN |
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IF ( debugLevel .GE. debLevA ) THEN |
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WRITE(msgBuf,'(A,A)') |
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& ' MDS_READ_FIELD: opening global file: ',dataFName(1:IL) |
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#ifndef ALLOW_ECCO |
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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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ENDIF |
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globalFile = .TRUE. |
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ENDIF |
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|
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C If negative check for global file with MDS name (ie. fName.data) |
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IF (.NOT. globalFile) THEN |
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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. debLevA ) THEN |
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WRITE(msgBuf,'(A,A)') |
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& ' MDS_READ_FIELD: opening global file: ',dataFName(1:IL+5) |
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#ifndef ALLOW_ECCO |
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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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ENDIF |
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globalFile = .TRUE. |
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ENDIF |
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ENDIF |
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|
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C- endif iAmDoingIO |
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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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|
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IF ( useSingleCPUIO ) THEN |
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|
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C master thread of process 0, only, opens a global file |
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IF ( iAmDoingIO ) THEN |
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C If global file is visible to process 0, then open it here. |
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C Otherwise stop program. |
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IF ( globalFile) THEN |
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length_of_rec=MDS_RECLEN( filePrec, x_size*y_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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WRITE(msgBuf,'(2A)') |
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& ' MDS_READ_FIELD: filename: ', dataFName(1:IL+5) |
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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_FIELD: 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_FIELD' |
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ENDIF |
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C- endif iAmDoingIO |
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ENDIF |
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|
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DO k=kLo,kHi |
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|
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C master thread of process 0, only, read from file |
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IF ( iAmDoingIO ) THEN |
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irec = k+1-kLo+nNz*(irecord-1) |
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IF (filePrec .EQ. precFloat32) THEN |
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READ(dUnit,rec=irec) xy_buffer_r4 |
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#ifdef _BYTESWAPIO |
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CALL MDS_BYTESWAPR4( x_size*y_size, xy_buffer_r4 ) |
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#endif |
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ELSEIF (filePrec .EQ. precFloat64) THEN |
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READ(dUnit,rec=irec) xy_buffer_r8 |
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#ifdef _BYTESWAPIO |
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CALL MDS_BYTESWAPR8( x_size*y_size, xy_buffer_r8 ) |
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#endif |
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ELSE |
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WRITE(msgBuf,'(A)') |
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& ' MDS_READ_FIELD: illegal value for filePrec' |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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STOP 'ABNORMAL END: S/R MDS_READ_FIELD' |
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ENDIF |
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|
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#if defined(ALLOW_EXCH2) && !defined(MISSING_TILE_IO) |
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bj=1 |
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DO npe=1,nPx*nPy |
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DO bi=1,nSx |
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#ifdef ALLOW_USE_MPI |
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loc_xGlobalLo = mpi_myXGlobalLo(npe) |
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loc_yGlobalLo = mpi_myYGlobalLo(npe) |
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#else /* ALLOW_USE_MPI */ |
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loc_xGlobalLo = myXGlobalLo |
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loc_yGlobalLo = myYGlobalLo |
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#endif /* ALLOW_USE_MPI */ |
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tN = W2_mpi_myTileList(npe,bi) |
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IF ( exch2_mydNx(tN) .GT. x_size ) THEN |
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C- face x-size larger than glob-size : fold it |
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iGjLoc = 0 |
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jGjLoc = exch2_mydNx(tN) / x_size |
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ELSEIF ( exch2_tNy(tN) .GT. y_size ) THEN |
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C- tile y-size larger than glob-size : make a long line |
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iGjLoc = exch2_mydNx(tN) |
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jGjLoc = 0 |
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ELSE |
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C- default (face fit into global-IO-array) |
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iGjLoc = 0 |
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jGjLoc = 1 |
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ENDIF |
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|
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IF (filePrec .EQ. precFloat32) THEN |
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DO J=1,sNy |
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DO I=1,sNx |
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iG = loc_xGlobalLo-1+(bi-1)*sNx+i |
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jG = loc_yGlobalLo-1+(bj-1)*sNy+j |
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iG_IO=exch2_txGlobalo(tN)+iGjLoc*(j-1)+i-1 |
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jG_IO=exch2_tyGlobalo(tN)+jGjLoc*(j-1) |
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globalBuf(iG,jG) = xy_buffer_r4(iG_IO,jG_IO) |
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ENDDO |
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ENDDO |
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ELSEIF (filePrec .EQ. precFloat64) THEN |
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DO J=1,sNy |
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DO I=1,sNx |
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iG = loc_xGlobalLo-1+(bi-1)*sNx+i |
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jG = loc_yGlobalLo-1+(bj-1)*sNy+j |
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iG_IO=exch2_txGlobalo(tN)+iGjLoc*(j-1)+i-1 |
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jG_IO=exch2_tyGlobalo(tN)+jGjLoc*(j-1) |
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globalBuf(iG,jG) = xy_buffer_r8(iG_IO,jG_IO) |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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C-- end of npe & bi loops |
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ENDDO |
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ENDDO |
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#else /* defined(ALLOW_EXCH2) && !defined(MISSING_TILE_IO) */ |
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IF (filePrec .EQ. precFloat32) THEN |
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DO J=1,Ny |
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DO I=1,Nx |
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globalBuf(I,J) = xy_buffer_r4(I,J) |
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ENDDO |
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ENDDO |
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ELSEIF (filePrec .EQ. precFloat64) THEN |
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DO J=1,Ny |
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DO I=1,Nx |
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globalBuf(I,J) = xy_buffer_r8(I,J) |
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ENDDO |
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ENDDO |
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ENDIF |
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#endif /* defined(ALLOW_EXCH2) && !defined(MISSING_TILE_IO) */ |
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C- endif iAmDoingIO |
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ENDIF |
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CALL SCATTER_2D(globalBuf,sharedLocalBuf,myThid) |
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IF (arrType .EQ. 'RS') THEN |
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CALL MDS_PASStoRS( sharedLocalBuf,arr,k,kSize,.TRUE.,myThid ) |
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ELSEIF (arrType .EQ. 'RL') THEN |
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CALL MDS_PASStoRL( sharedLocalBuf,arr,k,kSize,.TRUE.,myThid ) |
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ELSE |
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WRITE(msgBuf,'(A)') |
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& ' MDS_READ_FIELD: illegal value for arrType' |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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STOP 'ABNORMAL END: S/R MDS_READ_FIELD' |
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ENDIF |
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|
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ENDDO |
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c ENDDO k=kLo,kHi |
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|
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IF ( iAmDoingIO ) THEN |
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CLOSE( dUnit ) |
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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--- else .NOT.useSingleCpuIO |
| 333 |
ELSE |
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|
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C Only do I/O if I am the master thread |
| 336 |
IF ( iAmDoingIO ) THEN |
| 337 |
|
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C If we are reading from a global file then we open it here |
| 339 |
IF (globalFile) THEN |
| 340 |
length_of_rec=MDS_RECLEN( filePrec, sNx, myThid ) |
| 341 |
OPEN( dUnit, file=dataFName, status='old', |
| 342 |
& access='direct', recl=length_of_rec ) |
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fileIsOpen=.TRUE. |
| 344 |
ENDIF |
| 345 |
|
| 346 |
C Loop over all tiles |
| 347 |
DO bj=1,nSy |
| 348 |
DO bi=1,nSx |
| 349 |
C If we are reading from a tiled MDS file then we open each one here |
| 350 |
IF (.NOT. globalFile) THEN |
| 351 |
iG=bi+(myXGlobalLo-1)/sNx ! Kludge until unstructered tiles |
| 352 |
jG=bj+(myYGlobalLo-1)/sNy ! Kludge until unstructered tiles |
| 353 |
WRITE(dataFName,'(2A,I3.3,A,I3.3,A)') |
| 354 |
& pfName(1:pIL),'.',iG,'.',jG,'.data' |
| 355 |
INQUIRE( file=dataFName, exist=exst ) |
| 356 |
C Of course, we only open the file if the tile is "active" |
| 357 |
C (This is a place-holder for the active/passive mechanism |
| 358 |
IF (exst) THEN |
| 359 |
IF ( debugLevel .GE. debLevA ) THEN |
| 360 |
WRITE(msgBuf,'(A,A)') |
| 361 |
& ' MDS_READ_FIELD: opening file: ',dataFName(1:pIL+13) |
| 362 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
| 363 |
& SQUEEZE_RIGHT , myThid) |
| 364 |
ENDIF |
| 365 |
length_of_rec=MDS_RECLEN( filePrec, sNx, myThid ) |
| 366 |
OPEN( dUnit, file=dataFName, status='old', |
| 367 |
& access='direct', recl=length_of_rec ) |
| 368 |
fileIsOpen=.TRUE. |
| 369 |
ELSE |
| 370 |
fileIsOpen=.FALSE. |
| 371 |
WRITE(msgBuf,'(4A)') ' MDS_READ_FIELD: filename: ', |
| 372 |
& fName(1:IL),' , ', dataFName(1:pIL+13) |
| 373 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
| 374 |
& SQUEEZE_RIGHT , myThid) |
| 375 |
CALL PRINT_ERROR( msgBuf, myThid ) |
| 376 |
WRITE(msgBuf,'(A)') |
| 377 |
& ' MDS_READ_FIELD: Files DO not exist' |
| 378 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
| 379 |
& SQUEEZE_RIGHT , myThid) |
| 380 |
CALL PRINT_ERROR( msgBuf, myThid ) |
| 381 |
STOP 'ABNORMAL END: S/R MDS_READ_FIELD' |
| 382 |
ENDIF |
| 383 |
ENDIF |
| 384 |
|
| 385 |
IF (fileIsOpen) THEN |
| 386 |
tNy = sNy |
| 387 |
#ifdef ALLOW_EXCH2 |
| 388 |
tN = W2_myTileList(bi) |
| 389 |
tGy = exch2_tyGlobalo(tN) |
| 390 |
tGx = exch2_txGlobalo(tN) |
| 391 |
tNy = exch2_tNy(tN) |
| 392 |
tNx = exch2_tNx(tN) |
| 393 |
IF ( exch2_mydNx(tN) .GT. x_size ) THEN |
| 394 |
C- face x-size larger than glob-size : fold it |
| 395 |
iGjLoc = 0 |
| 396 |
jGjLoc = exch2_mydNx(tN) / x_size |
| 397 |
ELSEIF ( exch2_tNy(tN) .GT. y_size ) THEN |
| 398 |
C- tile y-size larger than glob-size : make a long line |
| 399 |
iGjLoc = exch2_mydNx(tN) |
| 400 |
jGjLoc = 0 |
| 401 |
ELSE |
| 402 |
C- default (face fit into global-IO-array) |
| 403 |
iGjLoc = 0 |
| 404 |
jGjLoc = 1 |
| 405 |
ENDIF |
| 406 |
#endif /* ALLOW_EXCH2 */ |
| 407 |
DO k=kLo,kHi |
| 408 |
DO j=1,tNy |
| 409 |
IF (globalFile) THEN |
| 410 |
#ifdef ALLOW_EXCH2 |
| 411 |
irec = 1 + ( tGx-1 + (j-1)*iGjLoc )/tNx |
| 412 |
& + ( tGy-1 + (j-1)*jGjLoc )*exch2_domain_nxt |
| 413 |
& + ( k-kLo + (irecord-1)*nNz |
| 414 |
& )*y_size*exch2_domain_nxt |
| 415 |
#else /* ALLOW_EXCH2 */ |
| 416 |
iG = myXGlobalLo-1 + (bi-1)*sNx |
| 417 |
jG = myYGlobalLo-1 + (bj-1)*sNy |
| 418 |
irec= 1 + INT(iG/sNx) + nSx*nPx*(jG+j-1) |
| 419 |
& + nSx*nPx*Ny*(k-kLo) |
| 420 |
& + nSx*nPx*Ny*nNz*(irecord-1) |
| 421 |
#endif /* ALLOW_EXCH2 */ |
| 422 |
ELSE |
| 423 |
irec=j + sNy*(k-kLo) + sNy*nNz*(irecord-1) |
| 424 |
ENDIF |
| 425 |
IF (filePrec .EQ. precFloat32) THEN |
| 426 |
READ(dUnit,rec=irec) r4seg |
| 427 |
#ifdef _BYTESWAPIO |
| 428 |
CALL MDS_BYTESWAPR4( sNx, r4seg ) |
| 429 |
#endif |
| 430 |
IF (arrType .EQ. 'RS') THEN |
| 431 |
CALL MDS_SEG4toRS( j,bi,bj,k,kSize, r4seg, .TRUE., arr ) |
| 432 |
ELSEIF (arrType .EQ. 'RL') THEN |
| 433 |
CALL MDS_SEG4toRL( j,bi,bj,k,kSize, r4seg, .TRUE., arr ) |
| 434 |
ELSE |
| 435 |
WRITE(msgBuf,'(A)') |
| 436 |
& ' MDS_READ_FIELD: illegal value for arrType' |
| 437 |
CALL PRINT_ERROR( msgBuf, myThid ) |
| 438 |
STOP 'ABNORMAL END: S/R MDS_READ_FIELD' |
| 439 |
ENDIF |
| 440 |
ELSEIF (filePrec .EQ. precFloat64) THEN |
| 441 |
READ(dUnit,rec=irec) r8seg |
| 442 |
#ifdef _BYTESWAPIO |
| 443 |
CALL MDS_BYTESWAPR8( sNx, r8seg ) |
| 444 |
#endif |
| 445 |
IF (arrType .EQ. 'RS') THEN |
| 446 |
CALL MDS_SEG8toRS( j,bi,bj,k,kSize, r8seg, .TRUE., arr ) |
| 447 |
ELSEIF (arrType .EQ. 'RL') THEN |
| 448 |
CALL MDS_SEG8toRL( j,bi,bj,k,kSize, r8seg, .TRUE., arr ) |
| 449 |
ELSE |
| 450 |
WRITE(msgBuf,'(A)') |
| 451 |
& ' MDS_READ_FIELD: illegal value for arrType' |
| 452 |
CALL PRINT_ERROR( msgBuf, myThid ) |
| 453 |
STOP 'ABNORMAL END: S/R MDS_READ_FIELD' |
| 454 |
ENDIF |
| 455 |
ELSE |
| 456 |
WRITE(msgBuf,'(A)') |
| 457 |
& ' MDS_READ_FIELD: illegal value for filePrec' |
| 458 |
CALL PRINT_ERROR( msgBuf, myThid ) |
| 459 |
STOP 'ABNORMAL END: S/R MDS_READ_FIELD' |
| 460 |
ENDIF |
| 461 |
C End of j loop |
| 462 |
ENDDO |
| 463 |
C End of k loop |
| 464 |
ENDDO |
| 465 |
C end if fileIsOpen |
| 466 |
ENDIF |
| 467 |
IF (fileIsOpen .AND. (.NOT. globalFile)) THEN |
| 468 |
CLOSE( dUnit ) |
| 469 |
fileIsOpen = .FALSE. |
| 470 |
ENDIF |
| 471 |
C End of bi,bj loops |
| 472 |
ENDDO |
| 473 |
ENDDO |
| 474 |
|
| 475 |
C If global file was opened then close it |
| 476 |
IF (fileIsOpen .AND. globalFile) THEN |
| 477 |
CLOSE( dUnit ) |
| 478 |
fileIsOpen = .FALSE. |
| 479 |
ENDIF |
| 480 |
|
| 481 |
C- endif iAmDoingIO |
| 482 |
ENDIF |
| 483 |
|
| 484 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 485 |
C if useSingleCpuIO / else / end |
| 486 |
ENDIF |
| 487 |
|
| 488 |
RETURN |
| 489 |
END |
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