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87 lines
2.5 KiB
Fortran
87 lines
2.5 KiB
Fortran
module input_mod
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use, intrinsic :: ISO_Fortran_env, only: stdout=>output_unit, stderr=>error_unit
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use kind_mod
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use mesh_mod, only: mesh_t, init_mesh
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implicit none
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!$omp requires unified_shared_memory
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private
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public :: debug, parse_arguments
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logical :: debug
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character(len=4) :: debug_string
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integer(IK), parameter :: default_domain_size = 4096
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contains
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subroutine parse_arguments(mesh)
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type(mesh_t), intent(out) :: mesh
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integer(IK) :: argc, n_x, n_y
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character(len=:), allocatable :: arg
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argc = command_argument_count()
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select case(argc)
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case (0)
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call init_mesh(mesh,default_domain_size,default_domain_size)
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case (1)
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call print_help_and_exit()
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case (2)
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select case(get_argument(1))
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case ('-m','--mesh')
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arg = get_argument(2)
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read(arg,*) n_x
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call init_mesh(mesh,n_x,n_x)
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case default
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call print_help_and_exit()
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end select
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case (3)
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select case(get_argument(1))
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case ('-m','--mesh')
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arg = get_argument(2)
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read(arg,*) n_x
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arg = get_argument(3)
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read(arg,*) n_y
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call init_mesh(mesh,n_x,n_y)
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case default
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call print_help_and_exit()
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end select
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case default
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call print_help_and_exit()
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end select
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call get_environment_variable("JACOBI_DEBUG", value=debug_string)
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select case(trim(debug_string))
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case ("TRUE","true","True","1")
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debug = .true.
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case default
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debug = .false.
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end select
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end subroutine parse_arguments
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function get_argument(n) result(arg)
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integer(IK), intent(in) :: n
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character(len=:), allocatable :: arg
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integer(IK) :: len
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call get_command_argument(n, length=len)
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allocate(character(len) :: arg)
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call get_command_argument(n,arg)
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if ( arg.eq.'-h'.or.arg.eq.'--help') call print_help_and_exit()
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end function get_argument
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subroutine print_help_and_exit()
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character(len=:), allocatable :: program_name
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program_name = get_argument(0)
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write(stderr,*) 'Usage: ',program_name,' [-m Mesh.X [Mesh.Y]] [-h | --help]'
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write(stderr,*) ' -m | --mesh Mesh.x [Mesh.y]: set the domain size per node'
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write(stderr,*) ' (if "Mesh.y" is missing, the domain size will default to (Mesh.x, Mesh.x);'
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write(stderr,*) ' Mesh.x and Mesh.y must be positive integers)'
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write(stderr,*) ' -h | --help: print help information'
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error stop 1
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end subroutine print_help_and_exit
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end module input_mod
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