amg4psblas/examples/pdegen/data_input.f90

!!$ 
!!$ 
!!$                           MLD2P4  version 2.0
!!$  MultiLevel Domain Decomposition Parallel Preconditioners Package
!!$             based on PSBLAS (Parallel Sparse BLAS version 3.3)
!!$  
!!$  (C) Copyright 2008, 2010, 2012, 2015
!!$
!!$                      Salvatore Filippone  University of Rome Tor Vergata
!!$                      Alfredo Buttari      CNRS-IRIT, Toulouse
!!$                      Pasqua D'Ambra       ICAR-CNR, Naples
!!$                      Daniela di Serafino  Second University of Naples
!!$ 
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!!$
module data_input
  
  interface read_data
    module procedure read_char, read_int,&
         & read_double, read_single,&
         & string_read_char, string_read_int,&
         & string_read_double, string_read_single
  end interface read_data
  interface trim_string
    module procedure trim_string
  end interface

  character(len=4096), private  :: charbuf
  character, private, parameter :: def_marker="!"

contains

  subroutine read_char(val,file,marker)
    character(len=*), intent(out) :: val
    integer, intent(in)           :: file
    character(len=1), optional, intent(in) :: marker

    read(file,'(a)')charbuf
    call read_data(val,charbuf,marker)

  end subroutine read_char

  subroutine read_int(val,file,marker)
    integer, intent(out) :: val
    integer, intent(in)  :: file
    character(len=1), optional, intent(in) :: marker

    read(file,'(a)')charbuf
    call read_data(val,charbuf,marker)

  end subroutine read_int
  subroutine read_single(val,file,marker)
    use psb_base_mod
    real(psb_spk_), intent(out) :: val
    integer, intent(in)         :: file
    character(len=1), optional, intent(in) :: marker

    read(file,'(a)')charbuf
    call read_data(val,charbuf,marker)

  end subroutine read_single
  subroutine read_double(val,file,marker)
    use psb_base_mod
    real(psb_dpk_), intent(out) :: val
    integer, intent(in)         :: file
    character(len=1), optional, intent(in) :: marker

    read(file,'(a)')charbuf
    call read_data(val,charbuf,marker)

  end subroutine read_double

  subroutine string_read_char(val,file,marker)
    character(len=*), intent(out) :: val
    character(len=*), intent(in)  :: file
    character(len=1), optional, intent(in) :: marker
    character(len=1)    :: marker_
    character(len=1024) :: charbuf
    integer :: idx
    if (present(marker)) then 
      marker_ = marker
    else
      marker_ = def_marker
    end if
    read(file,'(a)')charbuf
    charbuf = adjustl(charbuf)
    idx=index(charbuf,marker_)
    if (idx == 0) idx = len(charbuf)+1
    read(charbuf(1:idx-1),'(a)') val
  end subroutine string_read_char

  subroutine string_read_int(val,file,marker)
    integer, intent(out) :: val
    character(len=*), intent(in)  :: file
    character(len=1), optional, intent(in) :: marker
    character(len=1)    :: marker_
    character(len=1024) :: charbuf
    integer :: idx
    if (present(marker)) then 
      marker_ = marker
    else
      marker_ = def_marker
    end if
    read(file,'(a)')charbuf
    charbuf = adjustl(charbuf)
    idx=index(charbuf,marker_)
    if (idx == 0) idx = len(charbuf)+1
    read(charbuf(1:idx-1),*) val
  end subroutine string_read_int
  subroutine string_read_single(val,file,marker)
    use psb_base_mod
    real(psb_spk_), intent(out) :: val
    character(len=*), intent(in)         :: file
    character(len=1), optional, intent(in) :: marker
    character(len=1)    :: marker_
    character(len=1024) :: charbuf
    integer :: idx
    if (present(marker)) then 
      marker_ = marker
    else
      marker_ = def_marker
    end if
    read(file,'(a)')charbuf
    charbuf = adjustl(charbuf)
    idx=index(charbuf,marker_)
    if (idx == 0) idx = len(charbuf)+1
    read(charbuf(1:idx-1),*) val
  end subroutine string_read_single
  subroutine string_read_double(val,file,marker)
    use psb_base_mod
    real(psb_dpk_), intent(out) :: val
    character(len=*), intent(in)         :: file
    character(len=1), optional, intent(in) :: marker
    character(len=1)    :: marker_
    character(len=1024) :: charbuf
    integer :: idx
    if (present(marker)) then 
      marker_ = marker
    else
      marker_ = def_marker
    end if
    read(file,'(a)')charbuf
    charbuf = adjustl(charbuf)
    idx=index(charbuf,marker_)
    if (idx == 0) idx = len(charbuf)+1
    read(charbuf(1:idx-1),*) val
  end subroutine string_read_double

  function  trim_string(string,marker)
    character(len=*), intent(in) :: string
    character(len=1), optional, intent(in) :: marker
    character(len=len(string))    :: trim_string
    character(len=1)              :: marker_
    integer :: idx
    if (present(marker)) then 
      marker_ = marker
    else
      marker_ = def_marker
    end if
    idx=index(string,marker_)
    trim_string = adjustl(string(idx:))
  end function trim_string
end module data_input