C @(#)ftoc_commf.for	17.1.1.1 (ESO-DMD) 01/25/02 17:57:05
C===========================================================================
C Copyright (C) 1995 European Southern Observatory (ESO)
C
C This program is free software; you can redistribute it and/or 
C modify it under the terms of the GNU General Public License as 
C published by the Free Software Foundation; either version 2 of 
C the License, or (at your option) any later version.
C
C This program is distributed in the hope that it will be useful,
C but WITHOUT ANY WARRANTY; without even the implied warranty of
C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
C GNU General Public License for more details.
C
C You should have received a copy of the GNU General Public 
C License along with this program; if not, write to the Free 
C Software Foundation, Inc., 675 Massachusetts Ave, Cambridge, 
C MA 02139, USA.
C
C Correspondence concerning ESO-MIDAS should be addressed as follows:
C	Internet e-mail: midas@eso.org
C	Postal address: European Southern Observatory
C			Data Management Division 
C			Karl-Schwarzschild-Strasse 2
C			D 85748 Garching bei Muenchen 
C			GERMANY
C===========================================================================
C
C     This FORTRAN code is in the file named "ftoc_commf.for"
C     and checks our MADRID concept for allocating memory in Fortran
C
C
      PROGRAM EXAMPLE
C 
      INTEGER    MADRID(1)
      INTEGER    VALUE(3)
      INTEGER*8    PNTR
      INTEGER    STAT,MANY,NOPIX,NOBYT
C
      COMMON/VMR/MADRID
C
C  call a C-function which sets PNTR to an array start address
      CALL CSUB(PNTR)
C
      VALUE(1)=MADRID(PNTR)
      VALUE(2)=MADRID(PNTR+1)
      VALUE(3)=MADRID(PNTR+2)
C 
      IF ((MADRID(PNTR).NE.10) .OR. (MADRID(PNTR+1).NE.50)
     +    .OR. (MADRID(PNTR+2).NE.70)) GOTO 1000
C 
C assume 4 bytes for real data
C and allocate space for 400 000 real values in  a C-function
C 
      NOBYT = 4                     
      NOPIX = 400000
      MANY = NOPIX*NOBYT
      CALL FMAP(MANY,PNTR,STAT)
      IF (STAT.NE.0) GOTO 1010
C 
C now try to fill the allocated data with real values
C in a Fortran subroutine
C 
      CALL RTST(MADRID(PNTR),NOPIX,STAT)
      IF (STAT.NE.0) GOTO 1020
C 
      CALL FIN(0)
C 
C the following are all exits for failed code
C 
1000  CALL FIN(1)
C 
1010  CALL FIN(2)
C 
1020  CALL FIN(3)
C 
      STOP
      END