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369 lines
11 KiB
369 lines
11 KiB
2 years ago
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C Copyright(C) 1999-2020 National Technology & Engineering Solutions
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C of Sandia, LLC (NTESS). Under the terms of Contract DE-NA0003525 with
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C NTESS, the U.S. Government retains certain rights in this software.
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C
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C See packages/seacas/LICENSE for details
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c ======================================================================
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c ======================================================================
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c ======================================================================
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c ======================================================================
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c ROUTINE: filhnd
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c DESCRIPTION: Opens and closes files.
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c AUTHOR: John H. Glick
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c Sandia National Laboratories
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c Division 1511
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c DATE: December 20, 1988
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c TYPE OF SUBPROGRAM: subroutine
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c USAGE: call filhnd (unit , fil1, ecodei, ecodeo,
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c type, fform, facces, frecl, *)
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c PARAMETERS:
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c integer unit -- (INPUT)
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c If > 0, specifies the logical unit to be
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c opened.
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c If < 0, -unit specifies the logical unit to
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c close.
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c If = 0, all open logical units are to be
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c closed.
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c character type -- (INPUT)
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c 'I' if input file (status = 'old')
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c 'O' if output file (status = 'new')
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c 'U' if unknown file type (status = 'unknown')
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c 'S' if scratch file (status = 'scratch')
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c character fform -- (INPUT)
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c 'F' if formatted file
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c 'U' if unformatted file
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c CALLS:
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c prterr (BLOT) -- Prints an error message if one occurred
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c during the execution of filhnd.
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c exname (SUPES) -- Gets the filename associated with a unit
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c number.
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c lenstr (strlib) -- Gets the length of a string (excluding
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c trailing blanks).
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c GLOBAL VARIABLES REFERENCED:
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c CALLING ROUTINE(S): getins (BLOT)
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c SYSTEM DEPENDENCIES: none
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c ======================================================================
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c ======================================================================
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subroutine filhnd (unit, filn, ecodei, ecodeo, type, fform,
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& facces, frecl, *)
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c parameters
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integer unit
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c if > 0, the logical unit of the file to open.
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c if < 0, the logical unit of the file to close.
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c if = 0, close all files
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logical ecodei
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c On input, .TRUE., if program should abort
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c if an error on opening the file occurred.
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c .FALSE. otherwise.
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logical ecodeo
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c On output, .TRUE. if the file opening occurred successfully.
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c .FALSE. otherwise.
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integer frecl
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c If a file is to be opened and it is a direct access file,
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c the file's record length.
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c If a single file ( not all files ) is to be closed,
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c this parameter = 1 to delete the file on closing.
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c Otherwise, the default status parameter is used on the close
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c call.
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character type
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c 'o' if an old file,
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c 'n' if a new file,
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c 's' if a scratch file
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c 'u' if unknown
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character fform
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c 'u' if unformatted
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c 'f' if formatted
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character facces
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c 'd' if direct
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c s' if sequential
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character * (*) filn
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c Name of the file to open. If ! = ' ', then filhnd calls
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c the SUPES routine EXNAME to get the filename associated
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c with the specified unit number.
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c if unit <= 0, then all other parameters are ignored.
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c declarations
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character*2048 filnam
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c filename associated with unit
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integer lname
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c length of string filnam (less trailing blanks)
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character*11 form
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c value of form keyword in open statement
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character*10 access
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c value of access keyword in open statement
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character*7 status
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c value of status keyword in open statement
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integer lform,lstat
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c length of form and status keywords (less trailing blanks)
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integer lacces
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c length of access keyword (less trailing blanks)
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integer ios
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c integer indicating error status of the open call.
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c = 0 no error,
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c = error code otherwise.
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character*1 cparm
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c dummy argument for call to exparm
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character tform, ttype, tacces
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c Temporary variables for storing modified values of fform,
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c type, and facces
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c *****************************************************************
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c *****************************************************************
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c static declarations
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logical first
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save first
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integer maxunits
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parameter (maxunits=25)
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c maximum number of units that may be open at once.
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integer numopn
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c number of currently open files
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integer opnlst(maxunits)
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c array of currently open unit
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c numbers
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save numopn, opnlst
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data first / .TRUE. /
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c *********************************************************************
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c *********************************************************************
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if (first) then
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numopn = 0
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first = .FALSE.
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end if
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c print *, 'numopen = ',numopn
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c if ( numopn .gt. 0 )
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c & print *, 'list is ',(opnlst(i),i=1,numopn)
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if ( unit .gt. 0 ) then
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c open file associated with unit
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c set open keywords
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cparm = fform
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call upcase_bl ( cparm )
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tform = cparm(1:1)
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if ( tform .eq. 'U' ) then
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form = 'unformatted'
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else if (tform .eq. 'F' ) then
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form = 'formatted'
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else
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call prterr ('PROGRAM',
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& 'Bad value for fform parameter in filhnd routine.')
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return 1
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endif
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lform = lenstr ( form )
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cparm = type
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call upcase_bl ( cparm )
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ttype = cparm(1:1)
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if ( ttype .eq. 'O' ) then
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status = 'old'
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else if ( ttype .eq. 'N' ) then
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status = 'new'
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else if ( ttype .eq. 'U' ) then
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status = 'unknown'
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else if ( ttype .eq. 'S' ) then
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status = 'scratch'
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else
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call prterr ('PROGRAM',
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& 'Bad value for type parameter in filhnd.')
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return 1
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endif
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lstat = lenstr ( status )
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cparm = facces
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call upcase_bl ( cparm )
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tacces = cparm(1:1)
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if ( tacces .eq. 'D' ) then
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access = 'direct'
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else if ( tacces .eq. 'S' ) then
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access = 'sequential'
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else
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call prterr ('PROGRAM',
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& 'Bad value for access parameter in filhnd.')
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return 1
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endif
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lacces = lenstr ( access )
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c open file
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if ( status .ne. 'scratch' ) then
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c get file associated with unit
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filnam = filn
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call pack ( filnam, lname )
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if ( lname .eq. 0 ) then
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call exname ( unit, filnam, lname )
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endif
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if ( access .eq. 'direct' ) then
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open ( unit=unit, file=filnam(:lname),
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& form=form(:lform),
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& status=status(:lstat), access=access(:lacces),
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& recl=frecl, iostat=ios )
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else
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c print *,'filename=',filnam(:lname),'='
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c print *,'form=',form(:lform),'='
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c print *,'status=',status(:lstat),'='
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open ( unit=unit, file=filnam(:lname),
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& form=form(:lform),
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& status=status(:lstat), iostat=ios)
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endif
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if ( ios .ne. 0 ) then
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if ( ecodei ) then
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call prterr ('FATAL',
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& 'Error opening file in filhnd')
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return 1
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else
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call prterr ('ERROR',
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& 'Error opening file in filhnd')
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ecodeo = .FALSE.
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endif
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else
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ecodeo = .TRUE.
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endif
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else
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if ( access .eq. 'direct' ) then
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open ( unit=unit, form=form(:lform),
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& status=status(:lstat), access=access(:lacces),
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& recl=frecl, iostat=ios )
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else
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open ( unit=unit, form=form(:lform),
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& status=status(:lstat), iostat=ios)
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endif
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if ( ios .ne. 0 ) then
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if ( ecodei ) then
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call prterr ('FATAL',
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& 'Error opening file in filhnd')
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return 1
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else
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call prterr ('ERROR',
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& 'Error opening file in filhnd')
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ecodeo = .FALSE.
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endif
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else
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ecodeo = .TRUE.
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endif
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endif
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c update list of open files
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if ( ecodeo ) then
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numopn = numopn + 1
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opnlst(numopn) = unit
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endif
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else if ( unit .lt. 0 ) then
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c close file
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unit = -unit
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if ( frecl .eq. 1 ) then
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close ( unit=unit, status='delete', iostat=ios )
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else
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close ( unit=unit, iostat=ios )
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endif
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if ( ios .ne. 0 ) then
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call exname ( unit, filnam, lname )
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if ( ecodei ) then
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call prterr ('PROGRAM',
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& 'Error closing file in filhnd')
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return 1
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else
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call prterr ('PROGRAM',
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& 'Error closing file in filhnd')
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ecodeo = .FALSE.
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endif
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else
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ecodeo = .TRUE.
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endif
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c update list of open files
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if ( ecodeo ) then
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i = 1
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100 continue
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if ( (i .le. numopn) .and. (unit .ne. opnlst(i)) ) then
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i = i + 1
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go to 100
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endif
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if ( i .gt. numopn ) then
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call prterr ('PROGRAM',
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&'Closed a file in filhnd that was not on the list of open files')
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return 1
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else
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numopn = numopn - 1
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do 110 j = i, numopn
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opnlst(j) = opnlst(j+1)
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110 continue
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endif
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endif
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else
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c close all open files
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ecodeo = .TRUE.
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do 120 i = 1, numopn
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close ( unit=opnlst(i), iostat=ios )
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if ( ios .ne. 0 ) then
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call exname ( opnlst(i), filnam, lname )
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if ( ecodei ) then
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call prterr ('PROGRAM',
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& 'Error closing file in filhnd')
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return 1
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else
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call prterr ('PROGRAM',
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& 'Error closing file in filhnd')
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ecodeo = .FALSE.
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endif
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endif
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120 continue
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endif
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c print *, 'about to exit filhnd'
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c print *, 'numopen = ',numopn
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c if ( numopn .gt. 0 )
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c & print *, 'list is ',(opnlst(i),i=1,numopn)
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return
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end
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