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cnh |
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C $Header: /u/u0/gcmpack/MITgcm/pkg/mdsio/mdsio_readfield.F,v 1.1 2001/03/06 15:28:54 adcroft Exp $ |
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C $Name: checkpoint51 $ |
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#include "MDSIO_OPTIONS.h" |
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SUBROUTINE MDSREADFIELD( |
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I fName, |
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I filePrec, |
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I arrType, |
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I nNz, |
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O arr, |
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I irecord, |
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I myThid ) |
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C |
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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 arrType char(2) declaration of "arr": either "RS" or "RL" |
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C nNz integer size of third dimension: normally either 1 or Nr |
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C arr RS/RL array to read into, arr(:,:,nNz,:,:) |
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C irecord integer record number to read |
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C myThid integer thread identifier |
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C |
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C MDSREADFIELD 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". nNz allows for both 2-D and |
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C 3-D arrays to be handled. nNz=1 implies a 2-D model field and |
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C nNz=Nr implies a 3-D model field. irecord is the record number |
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C to be read and must be >= 1. The file data is stored in |
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C arr *but* the overlaps are *not* updated. ie. An exchange must |
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C be called. This is because the routine is sometimes called from |
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C 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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C modified: 11/07/03 afe@ocean.mit.edu |
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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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#define USE_W2 |
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#ifdef USE_W2 |
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#include "W2_EXCH2_TOPOLOGY.h" |
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#include "W2_EXCH2_PARAMS.h" |
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#endif |
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C Routine arguments |
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character*(*) fName |
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integer filePrec |
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character*(2) arrType |
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integer nNz |
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Real arr(*) |
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integer irecord |
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integer myThid |
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C Functions |
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integer ILNBLNK |
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integer MDS_RECLEN |
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C Local variables |
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character*(80) dataFName |
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integer iG,jG,irec,bi,bj,j,k,dUnit,IL |
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logical exst |
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Real*4 r4seg(sNx) |
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Real*8 r8seg(sNx) |
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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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integer domainHeight,domainLength,tby,tgx,tny,tnx,tn |
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C ------------------------------------------------------------------ |
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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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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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& ' MDSREADFIELD: 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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& ' MDSREADFIELD: Invalid value for irecord' |
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call print_error( msgbuf, mythid ) |
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stop 'ABNORMAL END: S/R MDSREADFIELD' |
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endif |
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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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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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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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write(msgbuf,'(a,a)') |
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& ' MDSREADFIELD: opening global file: ',dataFName |
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call print_message( msgbuf, standardmessageunit, |
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& SQUEEZE_RIGHT , mythid) |
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globalFile = .TRUE. |
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endif |
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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(1:80),'(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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write(msgbuf,'(a,a)') |
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& ' MDSREADFIELD: opening global file: ',dataFName |
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call print_message( msgbuf, standardmessageunit, |
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& SQUEEZE_RIGHT , mythid) |
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globalFile = .TRUE. |
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endif |
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endif |
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C If we are reading from a global file then we open it here |
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if (globalFile) then |
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length_of_rec=MDS_RECLEN( filePrec, sNx, 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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#ifdef USE_W2 |
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c domainLength = 2*ng+2*nb+2*nr |
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c domainLength = 2*1+2*1+2*1 |
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c domainLength =nsx |
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c domainLength = nsx / int(sqrt( nsx/6.0 )) |
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c domainHeight= int(sqrt( nsx/6.0 )) |
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domainLength = exch2_domain_nxt |
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domainHeight = exch2_domain_nyt |
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write(*,fmt='(1X,A,I3,A,I3)') 'L=', domainlength, |
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& 'H=', domainheight |
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C Loop over all tiles |
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do bj=1,nSy |
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do bi=1,nSx |
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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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write(msgbuf,'(a)') |
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& ' MDSREADFIELD: non-global input files not |
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& implemented with exch2' |
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call print_error( msgbuf, mythid ) |
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stop 'ABNORMAL END: S/R MDSREADFIELD' |
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endif |
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tn = W2_myTileList(bi) |
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tby = exch2_tbasey(tn) |
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tgx = exch2_txglobalo(tn) |
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tny = exch2_tny(tn) |
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tnx = exch2_tnx(tn) |
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if (fileIsOpen) then |
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do k=1,nNz |
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do j=1,tNy |
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write(*,fmt='(1X,A,I3,A,I3,A,I3,A,I3,A,I3,A,I3)') 'tby=', tby, |
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& ', tgx=', tgx, |
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& ', tnx=',tnx, ', tny=', tny, ', j=',j,', tn=',tn |
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irec = domainLength*tby + (tgx-1)/tnx + 1 + |
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& domainLength*(j-1) + |
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& domainLength*domainHeight*tny*(k-1) + |
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& domainLength*domainHeight*tny*nNz*(irecord-1) |
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c write(*,fmt='(1X,A,I6,A,I3)') 'record = ',irec,',thingy=', |
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c & (tgx-1)/tnx |
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write(*,fmt='(1X,A,I6)') 'record = ',irec |
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if (filePrec .eq. precFloat32) then |
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read(dUnit,rec=irec) r4seg |
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#ifdef _BYTESWAPIO |
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call MDS_BYTESWAPR4( sNx, r4seg ) |
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#endif |
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if (arrType .eq. 'RS') then |
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call MDS_SEG4toRS( j,bi,bj,k,nNz, r4seg, .TRUE., arr ) |
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elseif (arrType .eq. 'RL') then |
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call MDS_SEG4toRL( j,bi,bj,k,nNz, r4seg, .TRUE., arr ) |
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else |
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write(msgbuf,'(a)') |
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& ' MDSREADFIELD: illegal value for arrType' |
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call print_error( msgbuf, mythid ) |
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stop 'ABNORMAL END: S/R MDSREADFIELD' |
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endif |
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elseif (filePrec .eq. precFloat64) then |
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read(dUnit,rec=irec) r8seg |
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#ifdef _BYTESWAPIO |
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call MDS_BYTESWAPR8( sNx, r8seg ) |
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#endif |
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if (arrType .eq. 'RS') then |
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call MDS_SEG8toRS( j,bi,bj,k,nNz, r8seg, .TRUE., arr ) |
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elseif (arrType .eq. 'RL') then |
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call MDS_SEG8toRL( j,bi,bj,k,nNz, r8seg, .TRUE., arr ) |
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else |
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write(msgbuf,'(a)') |
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& ' MDSREADFIELD: illegal value for arrType' |
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call print_error( msgbuf, mythid ) |
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stop 'ABNORMAL END: S/R MDSREADFIELD' |
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endif |
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else |
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write(msgbuf,'(a)') |
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& ' MDSREADFIELD: illegal value for filePrec' |
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call print_error( msgbuf, mythid ) |
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stop 'ABNORMAL END: S/R MDSREADFIELD' |
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endif |
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C End of j loop |
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enddo |
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C End of k loop |
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enddo |
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if (.NOT. globalFile) then |
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close( dUnit ) |
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fileIsOpen = .FALSE. |
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endif |
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endif |
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C End of bi,bj loops |
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enddo |
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enddo |
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#else |
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C don't use W2_exch2 |
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C Loop over all tiles |
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do bj=1,nSy |
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do bi=1,nSx |
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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=bi+(myXGlobalLo-1)/sNx ! Kludge until unstructered tiles |
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jG=bj+(myYGlobalLo-1)/sNy ! Kludge until unstructered tiles |
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write(dataFname(1:80),'(2a,i3.3,a,i3.3,a)') |
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& fName(1:IL),'.',iG,'.',jG,'.data' |
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inquire( file=dataFname, exist=exst ) |
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C Of course, we only open the file if the tile is "active" |
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C (This is a place-holder for the active/passive mechanism |
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if (exst) then |
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write(msgbuf,'(a,a)') |
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& ' MDSREADFIELD: opening file: ',dataFName |
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call print_message( msgbuf, standardmessageunit, |
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& SQUEEZE_RIGHT , mythid) |
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length_of_rec=MDS_RECLEN( filePrec, sNx, 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,'(a,a)') |
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& ' MDSREADFIELD: filename: ',dataFName |
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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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& ' MDSREADFIELD: File does not exist' |
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call print_error( msgbuf, mythid ) |
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stop 'ABNORMAL END: S/R MDSREADFIELD' |
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endif |
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endif |
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if (fileIsOpen) then |
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do k=1,nNz |
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do j=1,sNy |
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if (globalFile) then |
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iG = myXGlobalLo-1 + (bi-1)*sNx |
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jG = myYGlobalLo-1 + (bj-1)*sNy |
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irec=1 + INT(iG/sNx) + nSx*nPx*(jG+j-1) + nSx*nPx*Ny*(k-1) |
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& + nSx*nPx*Ny*nNz*(irecord-1) |
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else |
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iG = 0 |
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jG = 0 |
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irec=j + sNy*(k-1) + sNy*nNz*(irecord-1) |
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endif |
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if (filePrec .eq. precFloat32) then |
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read(dUnit,rec=irec) r4seg |
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#ifdef _BYTESWAPIO |
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call MDS_BYTESWAPR4( sNx, r4seg ) |
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#endif |
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if (arrType .eq. 'RS') then |
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call MDS_SEG4toRS( j,bi,bj,k,nNz, r4seg, .TRUE., arr ) |
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elseif (arrType .eq. 'RL') then |
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call MDS_SEG4toRL( j,bi,bj,k,nNz, r4seg, .TRUE., arr ) |
| 287 |
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else |
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write(msgbuf,'(a)') |
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& ' MDSREADFIELD: illegal value for arrType' |
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call print_error( msgbuf, mythid ) |
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stop 'ABNORMAL END: S/R MDSREADFIELD' |
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endif |
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elseif (filePrec .eq. precFloat64) then |
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read(dUnit,rec=irec) r8seg |
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#ifdef _BYTESWAPIO |
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call MDS_BYTESWAPR8( sNx, r8seg ) |
| 297 |
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#endif |
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if (arrType .eq. 'RS') then |
| 299 |
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call MDS_SEG8toRS( j,bi,bj,k,nNz, r8seg, .TRUE., arr ) |
| 300 |
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elseif (arrType .eq. 'RL') then |
| 301 |
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call MDS_SEG8toRL( j,bi,bj,k,nNz, r8seg, .TRUE., arr ) |
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else |
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write(msgbuf,'(a)') |
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& ' MDSREADFIELD: illegal value for arrType' |
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call print_error( msgbuf, mythid ) |
| 306 |
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stop 'ABNORMAL END: S/R MDSREADFIELD' |
| 307 |
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endif |
| 308 |
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else |
| 309 |
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write(msgbuf,'(a)') |
| 310 |
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& ' MDSREADFIELD: illegal value for filePrec' |
| 311 |
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call print_error( msgbuf, mythid ) |
| 312 |
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stop 'ABNORMAL END: S/R MDSREADFIELD' |
| 313 |
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endif |
| 314 |
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C End of j loop |
| 315 |
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enddo |
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C End of k loop |
| 317 |
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enddo |
| 318 |
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if (.NOT. globalFile) then |
| 319 |
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close( dUnit ) |
| 320 |
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fileIsOpen = .FALSE. |
| 321 |
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endif |
| 322 |
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endif |
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C End of bi,bj loops |
| 324 |
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enddo |
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enddo |
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| 327 |
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#endif |
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C If global file was opened then close it |
| 330 |
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if (fileIsOpen .AND. globalFile) then |
| 331 |
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close( dUnit ) |
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fileIsOpen = .FALSE. |
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endif |
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_END_MASTER( myThid ) |
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| 339 |
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C ------------------------------------------------------------------ |
| 340 |
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return |
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end |
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