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flinqr.f
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flinqr.f
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SUBROUTINE FL_INQR ( filnam, exist, newfil, iret)
C************************************************************************
C* FL_INQR *
C* *
C* This subroutine determines whether a file exists. *
C* *
C* FL_INQR ( FILNAM, EXIST, NEWFIL, IRET ) *
C* *
C* Input parameters: *
C* FILNAM CHAR* File name *
C* *
C* Output parameters: *
C* EXIST LOGICAL File exists flag *
C* NEWFIL CHAR* Expanded file name *
C* IRET INTEGER Return code *
C* 0 = normal return *
C** *
C* Log: *
C* S. Schotz/GSC 4/90 *
C* J. Whistler/SSAI 6/91 Added SS_ENVR to convert sys. variables *
C* M. desJardins/NMC 1/92 Add capability to ignore ST_UCLC *
C* S. Jacobs/NMC 2/94 Added return of expanded file name *
C* G. Krueger/EAI 3/94 Changed length of char to 132 *
C* M. desJardins/NMC 8/94 Check first without changing case *
C************************************************************************
INCLUDE 'GEMPRM.PRM'
C*
CHARACTER*(*) filnam, newfil
LOGICAL exist
C*
CHARACTER file*132, flvar*132
LOGICAL case
C------------------------------------------------------------------------
iret = 0
newfil = ' '
C
C* Eliminate '^' in first character and set flag to avoid changing
C* case.
C
IF ( filnam (1:1) .eq. '^' ) THEN
file = filnam (2: )
case = .false.
ELSE
file = filnam
case = .true.
END IF
C
C* Do the INQUIRE with the modified file name. If the file is
C* found, we are done.
C
INQUIRE ( FILE = file, EXIST = exist, IOSTAT = ier )
IF ( exist ) THEN
newfil = file
RETURN
ELSE IF ( MTMACH .eq. MTVAX ) THEN
RETURN
END IF
C
C* If the INQUIRE failed, check for a logical name.
C
CALL SS_ENVR ( file, flvar, ivar )
IF ( ivar .eq. 0 ) THEN
INQUIRE ( FILE = flvar, EXIST = exist, IOSTAT = ier )
IF ( exist ) THEN
newfil = flvar
RETURN
END IF
END IF
C
C* If the INQUIRE has still failed, try converting name to
C* lower case.
C
IF ( .not. case ) RETURN
C*
CALL ST_UCLC ( file, file, ier )
IF ( ivar .eq. 0 ) THEN
CALL SS_ENVR ( file, flvar, ier )
ELSE
flvar = file
END IF
C*
INQUIRE ( FILE = flvar, EXIST = exist, IOSTAT = ier )
IF ( exist ) THEN
newfil = flvar
END IF
C*
RETURN
END