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dmnext.f
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dmnext.f
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SUBROUTINE DM_NEXT ( iflno, irow, icol, iret )
C************************************************************************
C* DM_NEXT *
C* *
C* This subroutine returns the location of the next row and column *
C* meeting the search criteria. *
C* *
C* DM_NEXT ( IFLNO, IROW, ICOL, IRET ) *
C* *
C* Input parameters: *
C* IFLNO INTEGER File number *
C* *
C* Output parameters: *
C* IROW INTEGER Row number *
C* ICOL INTEGER Column number *
C* IRET INTEGER Return code *
C* 0 = normal return *
C* -4 = file not open *
C* -17 = search criteria not met *
C** *
C* Log: *
C* M. desJardins/GSFC 4/87 *
C* m. gamazaychikov/CWS 04/11 Add code for A2DB connectivity *
C************************************************************************
INCLUDE 'GEMPRM.PRM'
INCLUDE 'dmcmn.cmn'
INCLUDE 'dbcmn.cmn'
C
LOGICAL cflag, done, skprow
CHARACTER timstr*10000, qtype*8,
+ timlist(200)*21, src*21, qparms*100
C-----------------------------------------------------------------------
C* For A2DB requests - set the needed common block information.
C
IF ( dbread ) THEN
C
C* For station data types (METAR, BUFR, SYNOP) set the current
C* station information.
C
IF ( dbdatasrc .ne. 'grid') THEN
IF ( firstdb ) THEN
stnindx = 1
firstdb = .false.
ELSE
stnindx = stnindx + 1
END IF
IF ( stnindx .gt. ntotstn ) THEN
stnindx = 0
iret = -17
RETURN
ELSE
dbstid = dbstns(stnindx)
dbstlt = stnlat(stnindx)
dbstln = stnlon(stnindx)
dbstel = stnelv(stnindx)
irow = stnindx
icol = stnindx
iret = 0
RETURN
END IF
C
C* For grid data set the parameters for A2DB requests
C
ELSE IF ( dbdatasrc .eq. 'grid' ) THEN
IF ( gridtmdb ) THEN
print *, 'A2DB requests not implemented.'
iret = -17
C qtype = 'dbTime'
C qparms = dbmodel
C CALL ST_NULL ( qtype, qtype, lenq, ier )
C CALL ST_LCUC (dbdatasrc, src,ier)
C CALL ST_NULL ( src, src, lenq, ier )
C CALL ST_NULL ( qparms, qparms, lenq, ier )
C
C* Get the list of available data times.
C
C CALL DB_GTIM ( qtype, src, qparms,
C + timstr, ltimstr, iret )
C IF ( iret .ne. 0 ) THEN
C iret = -17
C RETURN
C END IF
C ntimex = ltimstr/11
C CALL ST_CLSL (timstr(:ltimstr), '|', ' ', ntimex,
C + timlist, ntx, iret)
C IF (ntx .gt. 25 ) THEN
C do itim=ntx-24, ntx
C dbtimes(itim-(ntx-24)+1)= timlist(itim)
C end do
C ntime = 25
C ELSE
C do itim=1, ntx
C dbtimes(itim)= timlist(itim)
C end do
C ntime = ntx
C END IF
C iret = 0
C gridtmdb = .false.
C dbtime = dbtimes(igdtim)
C igdtim = igdtim + 1
RETURN
ELSE
IF ( dbtimes(igdtim) .eq. '' ) THEN
iret = -17
RETURN
ELSE
C
C* Set the current time from the list of available data times.
C
dbtime = dbtimes(igdtim)
igdtim = igdtim + 1
iret = 0
RETURN
END IF
END IF
END IF
END IF
C
C* Check that the file is open.
C
CALL DM_CHKF ( iflno, iret )
IF ( iret .ne. 0 ) RETURN
C
C* Initialize output and flags.
C
irow = 0
icol = 0
cflag = .false.
done = .false.
skprow = .false.
C
C* Set internal pointers to row and column.
C
jrow = ksrow ( iflno )
jcol = kscol ( iflno )
C
C* Check that search is not already done.
C
IF ( jrow .gt. klstrw ( iflno ) ) THEN
iret = -17
RETURN
END IF
C
C* Loop through columns and row until search criteria are met
C* or until end of file is reached.
C
DO WHILE ( ( .not. done ) .and. ( .not. cflag ) )
C
C* Increment row and column pointers.
C
IF ( ( jrow .eq. 0 ) .and. ( jcol .eq. 0 ) ) THEN
jrow = 1
ELSE IF ( skprow ) THEN
jrow = jrow + 1
jcol = 0
ELSE
jcol = jcol + 1
IF ( jcol .gt. klstcl ( iflno ) ) THEN
jrow = jrow + 1
jcol = 0
END IF
END IF
skprow = .false.
C
C* Check that end of file has not been reached.
C
IF ( jrow .gt. klstrw ( iflno ) ) THEN
iret = -17
done = .true.
END IF
C
C* Check whether this row and column meet conditions.
C
IF ( .not. done ) THEN
C
C* Check primary condition first.
C
CALL DM_COND ( iflno, 0, jrow, jcol, cflag, iret )
C
C* Set condition if entire row is being checked.
C
IF ( jcol .eq. 0 ) THEN
IF ( cflag ) THEN
jcol = 1
CALL DM_COND ( iflno,0,jrow,jcol,cflag,iret)
ELSE
skprow = .true.
END IF
END IF
C
C* If primary search was successful, check conditional
C* search criteria.
C
IF ( cflag .and. ( nsrch ( iflno ) .gt. 0 ) ) THEN
cflag = .false.
DO i = 1, nsrch ( iflno )
C
C* Do additive searches only if cflag is false.
C
IF ( (.not. cflag) .and. ( kaddsr (i,iflno)) ) THEN
CALL DM_COND (iflno,i,jrow,jcol,cflag,iret)
C
C* Do subtractive search only if cflag is true.
C
ELSE IF ( cflag .and.
+ (.not. kaddsr (i,iflno)) ) THEN
CALL DM_COND (iflno,i,jrow,jcol,cflag,iret)
cflag = .not. cflag
END IF
C
END DO
END IF
END IF
END DO
C
C* Update current row and column in common.
C
ksrow ( iflno ) = jrow
kscol ( iflno ) = jcol
C
C* If row and column were found, return to user.
C
IF ( .not. done ) THEN
irow = jrow
icol = jcol
END IF
C*
RETURN
END