RFLU_OpenRestartInfo.F90

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! *********************************************************************
! * Rocstar Simulation Suite                                          *
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! * Illinois Rocstar LLC                                              *
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! * License: See LICENSE file in top level of distribution package or *
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! * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,   *
! * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES   *
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! * NONINFRINGEMENT.  IN NO EVENT SHALL THE CONTRIBUTORS OR           *
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! * Arising FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE    *
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! *********************************************************************
! ******************************************************************************
!
! Purpose: Open restart file.
!
! Description: None.
!
! Input: 
!   global              Pointer to global data
!   filePosition        Position at which file to be opened (start or end)
!
! Output: 
!   fileExists          Logical indicating whether file exists
!
! Notes: 
!   1. The filePosition parameter is needed because the restart info file
!      is opened with two goals. The first is to open it with the goal of
!      getting the last output iteration or time. The second is to be able
!      to write to it by appending additional lines.
!   2. The fileExists parameter is needed because on if the file exists
!      on restarting the code, it will need to be read to determine the 
!      last output iteration or time.
!
! ******************************************************************************
!
! $Id: RFLU_OpenRestartInfo.F90,v 1.6 2008/12/06 08:44:12 mtcampbe Exp $
!
! Copyright: (c) 2003-2004 by the University of Illinois
!
! ******************************************************************************

SUBROUTINE rflu_openrestartinfo(global,filePosition,fileExists)

  USE moddatatypes
  USE modglobal, ONLY: t_global
  USE modparameters
  USE moderror
  USE modmpi
  
  USE modbuildfilenames, ONLY: buildfilenameplain

! *****************************************************************************
! Declarations and definitions
! *****************************************************************************

! =============================================================================
! Arguments
! =============================================================================

  INTEGER, INTENT(IN) :: fileposition
  TYPE(t_global), POINTER :: global

  LOGICAL, INTENT(OUT) :: fileexists

! =============================================================================
! Locals
! =============================================================================

  CHARACTER(CHRLEN) :: ifilename,rcsidentstring
  INTEGER :: errorflag

! *****************************************************************************
! Start
! *****************************************************************************

  rcsidentstring = '$RCSfile: RFLU_OpenRestartInfo.F90,v $ $Revision: 1.6 $'

  CALL registerfunction(global,'RFLU_OpenRestartInfo',&
  'RFLU_OpenRestartInfo.F90')

  IF ( global%myProcid == masterproc .AND. & 
       global%verbLevel > verbose_low ) THEN
    WRITE(stdout,'(A,1X,A)') solver_name, &
                             'Opening restart info file...'
  END IF ! global%verbLevel

! =============================================================================
! Open file
! =============================================================================

  CALL buildfilenameplain(global,filedest_outdir,'.rin',ifilename)

  INQUIRE(file=ifilename,exist=fileexists)
    
  IF ( fileexists .EQV. .true. ) THEN
    IF ( fileposition == file_position_start ) THEN 
      OPEN(if_restinfo,file=ifilename,form='FORMATTED',status='OLD', &
           iostat=errorflag) 
    ELSE IF ( fileposition == file_position_end ) THEN 
      OPEN(if_restinfo,file=ifilename,form='FORMATTED',status='OLD', &
           position='APPEND',iostat=errorflag)     
    ELSE 
      CALL errorstop(global,err_reached_default,__line__)
    END IF ! filePosition
  ELSE
    OPEN(if_restinfo,file=ifilename,form='FORMATTED',status='NEW', &
         iostat=errorflag)    
  END IF ! file

  global%error = errorflag
  IF ( global%error /= 0 ) THEN 
    CALL errorstop(global,err_file_open,__line__,'File: '//trim(ifilename))
  END IF ! global%error

! *****************************************************************************
! End
! *****************************************************************************

  IF ( global%myProcid == masterproc .AND. & 
       global%verbLevel > verbose_low ) THEN
    WRITE(stdout,'(A,1X,A)') solver_name, & 
                             'Opening restart info file done.'
  END IF ! global%verbLevel

  CALL deregisterfunction(global)

END SUBROUTINE rflu_openrestartinfo

! ******************************************************************************
!
! RCS Revision history:
!
! $Log: RFLU_OpenRestartInfo.F90,v $
! Revision 1.6  2008/12/06 08:44:12  mtcampbe
! Updated license.
!
! Revision 1.5  2008/11/19 22:17:25  mtcampbe
! Added Illinois Open Source License/Copyright
!
! Revision 1.4  2006/04/07 15:19:16  haselbac
! Removed tabs
!
! Revision 1.3  2004/06/16 20:00:21  haselbac
! Added use of ModBuildFileNames, cosmetics
!
! Revision 1.2  2003/08/20 02:09:58  haselbac
! Changed verbosity conditions to reduce solver output in GENx runs
!
! Revision 1.1  2003/06/20 22:32:30  haselbac
! Initial revision
!
! ******************************************************************************