dcdatetimeparseunits.f90

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!= 単位を表す文字列の解析
!= Parse strings that mean units
!
! Authors::   Yasuhiro MORIKAWA
! Version::   $Id: dcdatetimeparseunits.f90,v 1.1 2009-05-25 10:01:34 morikawa Exp $
! Tag Name::  $Name:  $
! Copyright:: Copyright (C) GFD Dennou Club, 2000-2005. All rights reserved.
! License::   See COPYRIGHT[link:../../COPYRIGHT]
!
  function dcdatetimeparseunits(str) result(symbol)
    !
    ! 引数 *str* に与えられた文字列を解釈し, 日時の単位を示す
    ! シンボルを返します. それぞれ以下の文字列が日時の単位として解釈されます.
    ! 大文字と小文字は区別されません.
    !
    ! 年         :: dc_date_types#UNIT_YEAR
    ! 月         :: dc_date_types#UNIT_MONTH
    ! 日         :: dc_date_types#UNIT_DAY
    ! 時         :: dc_date_types#UNIT_HOUR
    ! 分         :: dc_date_types#UNIT_MIN
    ! 秒         :: dc_date_types#UNIT_SEC
    ! 無次元時間 :: dc_date_types#UNIT_NONDIM
    !
    ! 返るシンボル (整数型) は以下の通りです. 
    !
    ! 年         :: dc_date_types#UNIT_SYMBOL_YEAR
    ! 月         :: dc_date_types#UNIT_SYMBOL_MONTH
    ! 日         :: dc_date_types#UNIT_SYMBOL_DAY
    ! 時         :: dc_date_types#UNIT_SYMBOL_HOUR
    ! 分         :: dc_date_types#UNIT_SYMBOL_MIN
    ! 秒         :: dc_date_types#UNIT_SYMBOL_SEC
    ! 無次元時間 :: dc_date_types#UNIT_SYMBOL_NONDIM
    !
    ! これらに該当しない文字列を *str* に与えた場合, 
    ! dc_date_types#UNIT_SYMBOL_ERR が返ります. 
    !
    use dc_types, only: token
    use dc_date_types, only: unit_year, unit_month, unit_day, &
      & unit_hour, unit_min, unit_sec, unit_nondim, &
      & unit_symbol_year, unit_symbol_month, unit_symbol_day, &
      & unit_symbol_hour, unit_symbol_min, unit_symbol_sec, &
      & unit_symbol_nondim, unit_symbol_err
    use dc_string, only: strieq
    implicit none
    character(*), intent(in):: str
    integer:: symbol
    integer:: unit_str_size, i
    character(TOKEN):: unit
  continue
    unit = adjustl(str)
    unit_str_size = size(unit_nondim)
    do i = 1, unit_str_size
      if (strieq(trim(unit), trim(unit_nondim(i)))) then
        symbol = unit_symbol_nondim
        return
      end if
    end do

    unit_str_size = size(unit_sec)
    do i = 1, unit_str_size
      if (strieq(trim(unit), trim(unit_sec(i)))) then
        symbol = unit_symbol_sec
        return
      end if
    end do

    unit_str_size = size(unit_min)
    do i = 1, unit_str_size
      if (strieq(trim(unit), trim(unit_min(i)))) then
        symbol = unit_symbol_min
        return
      end if
    end do

    unit_str_size = size(unit_hour)
    do i = 1, unit_str_size
      if (strieq(trim(unit), trim(unit_hour(i)))) then
        symbol = unit_symbol_hour
        return
      end if
    end do

    unit_str_size = size(unit_day)
    do i = 1, unit_str_size
      if (strieq(trim(unit), trim(unit_day(i)))) then
        symbol = unit_symbol_day
        return
      end if
    end do

    unit_str_size = size(unit_month)
    do i = 1, unit_str_size
      if (strieq(trim(unit), trim(unit_month(i)))) then
        symbol = unit_symbol_month
        return
      end if
    end do

    unit_str_size = size(unit_year)
    do i = 1, unit_str_size
      if (strieq(trim(unit), trim(unit_year(i)))) then
        symbol = unit_symbol_year
        return
      end if
    end do

    symbol = unit_symbol_err

  end function dcdatetimeparseunits