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SUBROUTINE CONWIN(LUN,INC1,INC2) 4,3
C$$$ SUBPROGRAM DOCUMENTATION BLOCK
C
C SUBPROGRAM: CONWIN
C PRGMMR: WOOLLEN ORG: NP20 DATE: 1994-01-06
C
C ABSTRACT: THIS SUBROUTINE SEARCHES CONSECUTIVE SUBSET BUFFER SEGMENTS
C FOR AN ELEMENT IDENTIFIED IN THE USER STRING AS A CONDITIONAL NODE
C (I.E. AN ELEMENT WHICH MUST MEET A CONDITION IN ORDER TO BE READ
C FROM OR WRITTEN TO A DATA SUBSET). IF A CONDITIONAL ELEMENT IS
C FOUND AND IT CONFORMS TO THE CONDITION, THEN THE INTERNAL SUBSET
C BUFFER INDICES OF THE "WINDOW" (SEE BELOW REMARKS) ARE RETURNED TO
C THE CALLER FOR PROCESSING.
C
C THE FOUR CONDITIONS WHICH CAN BE EXERCISED ARE:
C '<' - LESS THAN
C '>' - GREATER THAN
C '=' - EQUAL
C '!' - NOT EQUAL
C
C EACH CONDITION IN A STRING IS APPLIED TO ONE ELEMENT, AND ALL
C CONDITIONS ARE 'AND'ED TO EVALUATE AN OUTCOME. FOR EXAMPLE, IF THE
C CONDITION STRING IS: "POB<500 TOB>30 TQM<4" THEN THE ONLY LEVELS OF
C DATA READ OR WRITTEN ARE THOSE WITH PRESSURE LT 500 MB, TEMPERATURE
C GT 30 DEG, AND TEMPERATURE QUALITY MARK < 4.
C
C PROGRAM HISTORY LOG:
C 1994-01-06 J. WOOLLEN -- ORIGINAL AUTHOR
C 1998-07-08 J. WOOLLEN -- IMPROVED MACHINE PORTABILITY
C 1999-11-18 J. WOOLLEN -- THE NUMBER OF BUFR FILES WHICH CAN BE
C OPENED AT ONE TIME INCREASED FROM 10 TO 32
C (NECESSARY IN ORDER TO PROCESS MULTIPLE
C BUFR FILES UNDER THE MPI)
C 2003-11-04 S. BENDER -- ADDED REMARKS/BUFRLIB ROUTINE
C INTERDEPENDENCIES
C 2003-11-04 D. KEYSER -- MAXJL (MAXIMUM NUMBER OF JUMP/LINK ENTRIES)
C INCREASED FROM 15000 TO 16000 (WAS IN
C VERIFICATION VERSION); UNIFIED/PORTABLE FOR
C WRF; ADDED DOCUMENTATION (INCLUDING
C HISTORY)
C 2010-04-27 J. WOOLLEN -- CORRECT LOGICAL FLAW AND ADD DOCUMENTATION
C
C USAGE: CALL CONWIN
(LUN, INC1, INC2)
C INPUT ARGUMENT LIST:
C LUN - INTEGER: I/O STREAM INDEX INTO INTERNAL MEMORY ARRAYS
C INC1 - INTEGER: SUBSET BUFFER START INDEX
C INC2 - INTEGER: SUBSET BUFFER ENDING INDEX
C
C OUTPUT ARGUMENT LIST:
C INC1 - INTEGER: SUBSET BUFFER START INDEX
C INC2 - INTEGER: SUBSET BUFFER ENDING INDEX
C
C REMARKS:
C
C SEE THE DOCBLOCK IN BUFR ARCHIVE LIBRARY SUBROUTINE GETWIN FOR AN
C EXPLANATION OF "WINDOWS" WITHIN THE CONTEXT OF A BUFR DATA SUBSET.
C
C FUNCTION CONWIN WORKS WITH FUNCTION INVCON TO IDENTIFY SUBSET
C BUFFER SEGMENTS WHICH CONFORM TO THE SET OF CONDITIONS.
C
C THIS ROUTINE CALLS: GETWIN INVCON
C THIS ROUTINE IS CALLED BY: UFBEVN UFBIN3 UFBRW
C Normally not called by any application
C programs.
C
C ATTRIBUTES:
C LANGUAGE: FORTRAN 77
C MACHINE: PORTABLE TO ALL PLATFORMS
C
C$$$
INCLUDE 'bufrlib.prm'
COMMON /USRINT/ NVAL(NFILES),INV(MAXSS,NFILES),VAL(MAXSS,NFILES)
COMMON /USRSTR/ NNOD,NCON,NODS(20),NODC(10),IVLS(10),KONS(10)
REAL*8 VAL
C----------------------------------------------------------------------
C----------------------------------------------------------------------
C SPECIAL CASE
C ------------
IF(NCON.EQ.0) THEN
c .... There are no condition nodes in the string
INC1 = 1
INC2 = NVAL(LUN)
GOTO 100
ENDIF
C EVALUATE CONDITIONS TO SEE IF ANY MORE CASES
C --------------------------------------------
15 CALL GETWIN(NODC(1),LUN,INC1,INC2)
IF(INC1.GT.0) THEN
DO NC=1,NCON
ICON = INVCON(NC,LUN,INC1,INC2)
IF(ICON.EQ.0) GOTO 15
ENDDO
ENDIF
C EXIT
C ----
100 RETURN
END