open_file.F90 Source File

!
!     (c) 2019 Guide Star Engineering, LLC
!     This Software was developed for the US Nuclear Regulatory Commission (US NRC)
!     under contract "Multi-Dimensional Physics Implementation into Fuel Analysis under
!     Steady-state and Transients (FAST)", contract # NRC-HQ-60-17-C-0007
!
!
!    NEMO - Numerical Engine (for) Multiphysics Operators
! Copyright (c) 2007, Stefano Toninel
!                     Gian Marco Bianchi  University of Bologna
!              David P. Schmidt    University of Massachusetts - Amherst
!              Salvatore Filippone University of Rome Tor Vergata
! All rights reserved.
!
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! are permitted provided that the following conditions are met:
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!        this list of conditions and the following disclaimer.
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!        this list of conditions and the following disclaimer in the documentation
!        and/or other materials provided with the distribution.
!     3. Neither the name of the NEMO project nor the names of its contributors
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!---------------------------------------------------------------------------------
!
! $Id: open_file.f90 3093 2008-04-22 14:51:09Z sfilippo $
!
! Description:
!    To be added...
!
SUBMODULE(tools_input) open_file_implementation
    IMPLICIT NONE

    CONTAINS

        MODULE PROCEDURE open_file
        USE class_psblas, ONLY : abort_psblas
        USE json_module, ONLY : json_file
        IMPLICIT NONE
        !! Opens a file

        LOGICAL :: ex
        INTEGER :: path_length, var_status, inp
        CHARACTER(LEN=:), ALLOCATABLE :: dirname
#ifdef WIN32
        CHARACTER(LEN=*), PARAMETER :: cwd_var = 'CD'
#else
        CHARACTER(LEN=*), PARAMETER :: cwd_var = 'PWD'
#endif

        INQUIRE(file=input_file,exist=ex,number=inp)
        IF(.NOT. ex) THEN
            CALL get_environment_variable (cwd_var, length=path_length, status=var_status)
            SELECT CASE (var_status)
            CASE (1)
                !! Undefined
                ERROR STOP 'Undefined cwd_var in open_file_implementation, open_file.F90'
            CASE (0)
                !! Good
                ALLOCATE(CHARACTER(LEN=path_length)::dirname)
                CALL get_environment_variable (cwd_var, value=dirname)
            CASE DEFAULT
                !! Something went wrong
                ERROR STOP 'Environment variable does not exist or processor does not support environment variables, open_file.F90'
            END SELECT

            WRITE(*,100) TRIM(input_file), dirname

            CALL abort_psblas
        END IF

        IF(inp == -1) THEN
            CALL nemo_json%initialize()
            CALL nemo_json%load_file(filename=input_file)
        END IF

100     FORMAT(' ERROR! Input file "',a,'" doesn''t exist',/,' in directory ',a)

        END PROCEDURE open_file

END SUBMODULE open_file_implementation