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ranging.f
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ranging.f
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subroutine ranging(dspace, ispace, nspace, ncols, nrows, status,
. dcup, drup, dclo, drlo, dobj, result, ifail)
implicit none
INCLUDE 'SLPCOMM.INC'
c ------------ declaration of passed parameters -----------------
integer nspace, ncols, nrows, ifail
integer ispace(2*nspace), status(ncols+nrows)
double precision dspace(nspace), dcup(ncols), drup(nrows),
& result(7,nrows+ncols), dclo(ncols), drlo(nrows),
& dobj(ncols)
c ------------- declaration of internal variables ---------------
double precision dzero, volume, dsmall
parameter (dzero = 1d-10)
parameter (volume = 1.d0)
parameter (dsmall = 0.d0)
integer i, j, k, l
integer istat, jstat, kstat, lstat, rtcod
double precision dlevel, dlowercost, dupperlevel, duppercost,
. dlowerlevel
include 'EMSOLI.INC'
include 'EMSOLN.INC'
include 'EMSOLR.INC'
c --------------------- subroutine body -------------------------
*
*-----------------------------
* Get pointers to EMS data *
*-----------------------------
*
call ems_iget(rtcod, dspace, emsoli, emsoliln)
if (rtcod.ne.0) then
WRITE(nout,*)'error in ems_iget: ',rtcod
IF(RTCOD.GE.BAD_EMSERROR) THEN
CALL GET_EMSERROR('IGET',RTCOD,EMSOL_ERRORMESSAGE)
END IF
goto 999
end if
*
*--------------------
* Perform ranging *
*--------------------
*
call ems_rgda(rtcod, dspace)
if (rtcod.ne.0) then
WRITE(nout,*)'error in ems_rgda: ',rtcod
IF(RTCOD.GE.BAD_EMSERROR) THEN
c CALL GET_EMSERROR('RGDA',RTCOD,EMSOL_ERRORMESSAGE)
END IF
goto 999
end if
*
*-----------------------------
* Get pointers to EMS data *
*-----------------------------
*
call ems_nget(rtcod, dspace, emsoln, emsolnln)
if (rtcod.ne.0) then
WRITE(nout,*)'error in ems_nget: ',rtcod
IF(RTCOD.GE.BAD_EMSERROR) THEN
CALL GET_EMSERROR('NGET',RTCOD,EMSOL_ERRORMESSAGE)
END IF
goto 999
end if
*
*----------------------------------------
* Start extracting column status bits *
*----------------------------------------
*
DO 160 J=1,NCOLS
*
*------------------------
* Extract status bits *
*------------------------
*
CALL TEST_BIT(ispace(emsoln(10)+j-1),1,ISTAT)
CALL TEST_BIT(ispace(emsoln(10)+j-1),2,JSTAT)
CALL TEST_BIT(ispace(emsoln(10)+j-1),3,KSTAT)
CALL TEST_BIT(ispace(emsoln(10)+j-1),4,LSTAT)
c write (*,'(I3,4I2)') j, LSTAT, KSTAT, JSTAT, ISTAT
*
*--------------------
* Feasible column *
*--------------------
*
c Status = 1 : Variable is basic (in between bounds)
c 2 : Variable at lower bound
c 3 : Variable at upper bound
c 4 : Variable below lower bound
c 5 : Variable above upper bound
c
IF (LSTAT.EQ.0) THEN
IF (ISTAT.NE.0) THEN
STATUS(J)=1
ELSE IF (JSTAT.NE.0) THEN
STATUS(J)=3
ELSE IF (KSTAT.NE.0) THEN
STATUS(J)=2
ELSE
IF (dspace(emsoln(9)+J-1).LT.0D0) THEN
STATUS(J)=3
ELSE
STATUS(J)=2
END IF
END IF
*
*----------------------
* Infeasible column *
*----------------------
*
ELSE
IF(JSTAT.NE.0) THEN
STATUS(J)=5
ELSE IF(KSTAT.NE.0) THEN
STATUS(J)=4
ELSE
IF(dspace(emsoln(7)+J-1).GT.
& dcup(J)) THEN
STATUS(J)=5
ELSE
STATUS(J)=4
END IF
END IF
END IF
*
*-----------------------------------------
* Finish extracting column status bits *
*-----------------------------------------
*
160 CONTINUE
*
*-------------------------------------
* Start extracting row status bits *
*-------------------------------------
*
DO 170 I=1,NROWS
*
*------------------------
* Extract status bits *
*------------------------
*
K=NCOLS+I
CALL TEST_BIT(ispace(emsoln(5)+i-1),1,ISTAT)
CALL TEST_BIT(ispace(emsoln(5)+i-1),2,JSTAT)
CALL TEST_BIT(ispace(emsoln(5)+i-1),3,KSTAT)
CALL TEST_BIT(ispace(emsoln(5)+i-1),4,LSTAT)
*
*-----------------
* Feasible row *
*-----------------
*
IF(LSTAT.EQ.0) THEN
IF(ISTAT.NE.0) THEN
STATUS(K)=1
ELSE IF(JSTAT.NE.0) THEN
STATUS(K)=3
ELSE IF(KSTAT.NE.0) THEN
STATUS(K)=2
ELSE
IF(dspace(emsoln(4)+I-1).GE.0D0) THEN
STATUS(K)=3
ELSE
STATUS(K)=2
END IF
END IF
*
*-------------------
* Infeasible row *
*-------------------
*
ELSE
IF(JSTAT.NE.0) THEN
STATUS(K)=5
ELSE IF(KSTAT.NE.0) THEN
STATUS(K)=4
ELSE
IF(dspace(emsoln(2)+I-1).GT.
& drup(i)) THEN
STATUS(K)=5
ELSE
STATUS(K)=4
END IF
END IF
END IF
*
*--------------------------------------
* Finish extracting row status bits *
*--------------------------------------
*
170 CONTINUE
*
*------------------------------------
* Start extracting column results *
*------------------------------------
*
DO 200 J=1,NCOLS
*
*----------------------------
* Extract column activity *
*----------------------------
*
DLEVEL=dspace(emsoln(7)+J-1)
*
IF(STATUS(J).LE.3) THEN
DLEVEL=MIN(MAX(DLEVEL, dclo(J)), dcup(J))
IF(ABS(DLEVEL).LE.DZERO/VOLUME) THEN
IF(STATUS(J).EQ.2) THEN
DLEVEL=0D0
ELSE
IF(DLEVEL.EQ.0D0) THEN
DLEVEL=DSMALL/VOLUME
END IF
END IF
END IF
END IF
*
RESULT(1,J)=DLEVEL
RESULT(2,J)=dclo(J)
RESULT(3,J)=dcup(J)
*
*------------------------------
* Test if have done ranging *
*------------------------------
*
c IF(IFALL.NE.1) THEN
c RESULT(4,J)=0D0
c RESULT(5,J)=0D0
c RESULT(6,J)=0D0
c RESULT(7,J)=0D0
c GOTO 200
c END IF
*
*---------------------
* Get ranging data *
*---------------------
*
c EMSOL vectors:
c 32 : lowest cost to maintain current basis
c 31 : highest cost to maintain current basis
c 39 : highest upper bound to maintain current basis
c 40 : lowest lower bound to maintain current basis
c DLOWERCOST : maximal change of cost down
c DUPPERCOST : maximal change of cost up
c DLOWERLEVEL: maximal change of variable value up
c DUPPERLEVEL: maximal change of variable value down
DLOWERCOST = dobj(J)-dspace(emsoln(32)+J-1)
DUPPERLEVEL= dspace(emsoln(39)+J-1)-DLEVEL
DUPPERCOST = dspace(emsoln(31)+J-1)-dobj(J)
DLOWERLEVEL= DLEVEL-dspace(emsoln(40)+J-1)
*
*-------------------
* Basic variable * (in between bounds)
*-------------------
*
IF(STATUS(J).EQ.1) THEN
RESULT(4,J)=DLOWERCOST
RESULT(5,J)=DUPPERLEVEL
RESULT(6,J)=DUPPERCOST
RESULT(7,J)=DLOWERLEVEL
*
*----------------
* Lower bound *
*----------------
*
ELSE IF(STATUS(J).EQ.2) THEN
RESULT(4,J)=DLOWERCOST
RESULT(5,J)=DUPPERLEVEL
RESULT(6,J)=DLOWERLEVEL
RESULT(7,J)=0D0
*
*----------------
* Upper bound *
*----------------
*
ELSE
RESULT(4,J)=DUPPERCOST
RESULT(5,J)=DLOWERLEVEL
RESULT(6,J)=DUPPERLEVEL
RESULT(7,J)=0D0
END IF
*
*-------------------------------
* Check if results too small *
*-------------------------------
*
DO 180 L=4,7
IF (ABS(RESULT(L,J)).LE.DZERO/VOLUME) THEN
RESULT(L,J)=0D0
END IF
180 CONTINUE
*
*-------------------------------------
* Finish extracting column results *
*-------------------------------------
*
200 CONTINUE
*
*---------------------------------
* Start extracting row results *
*---------------------------------
*
DO 220 I=1,NROWS
*
*-------------------------
* Extract row activity *
*-------------------------
*
K=NCOLS+I
DLEVEL=dspace(emsoln(2)+I-1)
IF(STATUS(K).LE.3) THEN
DLEVEL=MIN(MAX(DLEVEL,drlo(i)),drup(i))
END IF
RESULT(1,K)=DLEVEL
RESULT(2,K)=drlo(i)
RESULT(3,K)=drup(i)
*
*------------------------------
* Test if have done ranging *
*------------------------------
*
c IF(IFALL.NE.1) THEN
c RESULT(4,K)=0D0
c RESULT(5,K)=0D0
c RESULT(6,K)=0D0
c RESULT(7,K)=0D0
c GOTO 220
c END IF
*
*---------------------
* Get ranging data *
*---------------------
*
c EMSOL ARRAYS:
c 32 : continuation of lowests costs to maintain current basis
c 31 : continuation of highest costs to maintain current basis
c 47 : highest row bound to maintain current basis
c 48 : lowest row bound to maintain current basis
c DLOWERCOST : continuation of lowest cost to maintain basis
c DUPPERCOST : continuation of highest cost to maintain basis
c DLOWERLEVEL: maximum change of bounds down
c DUPPERLEVEL: maximum change of bounds up
DLOWERCOST = dspace(emsoln(32)+K-1)
DUPPERLEVEL= dspace(emsoln(47)+I-1)-DLEVEL
DUPPERCOST = dspace(emsoln(31)+K-1)
DLOWERLEVEL= DLEVEL-dspace(emsoln(48)+I-1)
*
*-------------------
* Basic variable *
*-------------------
*
IF(STATUS(K).EQ.1) THEN
RESULT(4,K)=-DLOWERCOST
RESULT(5,K)=DUPPERLEVEL
RESULT(6,K)=DUPPERCOST
RESULT(7,K)=DLOWERLEVEL
*
*----------------
* Lower bound *
*----------------
*
ELSE IF(STATUS(K).EQ.2) THEN
RESULT(4,K)=-DLOWERCOST
RESULT(5,K)=DUPPERLEVEL
RESULT(6,K)=DLOWERLEVEL
RESULT(7,K)=0D0
*
*----------------
* Upper bound *
*----------------
*
ELSE
RESULT(4,K)=DUPPERCOST
RESULT(5,K)=DLOWERLEVEL
RESULT(6,K)=DUPPERLEVEL
RESULT(7,K)=0D0
END IF
*
*-------------------------------
* Check if results too small *
*-------------------------------
*
DO 210 L=4,7
IF(ABS(RESULT(L,K)).LE.DZERO) THEN
RESULT(L,K)=0D0
END IF
210 CONTINUE
*
*----------------------------------
* Finish extracting row results *
*----------------------------------
*
220 CONTINUE
c do i=1,ncols
c print '(I3,3G15.8,I4)', i, (result(j, i), j=1,3), status(i)
c end do
ifail = 0
return
999 continue
ifail = 1
return
end