psblas3/base/modules/psb_string_mod.f90

!!$ 
!!$              Parallel Sparse BLAS  version 2.2
!!$    (C) Copyright 2006/2007/2008
!!$                       Salvatore Filippone    University of Rome Tor Vergata
!!$                       Alfredo Buttari        University of Rome Tor Vergata
!!$ 
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!!$  
module psb_string_mod

  public tolower, toupper, touppers
  interface tolower
    module procedure tolowerc
  end interface

  interface toupper
    module procedure toupperc
  end interface

  interface touppers
    module procedure sub_toupperc
  end interface

  private
  character(len=*), parameter   :: lcase='abcdefghijklmnopqrstuvwxyz'
  character(len=*), parameter   :: ucase='ABCDEFGHIJKLMNOPQRSTUVWXYZ'

contains 

  function  tolowerc(string)
    character(len=*), intent(in)  :: string
    character(len=len(string))    :: tolowerc
    integer  :: i,k

    do i=1,len(string)
      k = index(ucase,string(i:i))
      if (k /=0 ) then 
        tolowerc(i:i) = lcase(k:k)
      else          
        tolowerc(i:i) = string(i:i)
      end if
    enddo
  end function tolowerc

  function  toupperc(string)
    character(len=*), intent(in)  :: string
    character(len=len(string))    :: toupperc
    integer  :: i,k

    do i=1,len(string)
      k = index(lcase,string(i:i))
      if (k /=0 ) then 
        toupperc(i:i) = ucase(k:k)
      else          
        toupperc(i:i) = string(i:i)
      end if
    enddo
  end function toupperc

  subroutine   sub_toupperc(string,strout)
    character(len=*), intent(in)  :: string
    character(len=*), intent(out)  :: strout
    integer  :: i,k

    do i=1,len(string)
      k = index(lcase,string(i:i))
      if (k /=0 ) then 
        strout(i:i) = ucase(k:k)
      else          
        strout(i:i) = string(i:i)
      end if
    enddo
  end subroutine sub_toupperc

end module psb_string_mod