modi_gltools_strsplit.F90

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! =======================================================================
! ===================== MODULE modi_gltools_strsplit ======================
! =======================================================================
!
!   Input: 
!       - a character string containing words and blanks as separators
!       - the number of words in this string (denoted as n)
!   This module returns a vector of n components, where every component
! corresponds to a word included in the input string.
!   Note that n can be easily computed by modi_gltools_nwords, and that
! the maximum length of a word is arbitrarily set to 80.
!
! Created : 05/03/2008 (D. Salas)
! Modified: no
!
! ------------------ BEGIN MODULE modi_gltools_strsplit -------------------
!
!THXS_SFX!MODULE modi_gltools_strsplit
!THXS_SFX!INTERFACE
!THXS_SFX!!
!THXS_SFX!FUNCTION gltools_strsplit( hval,knword ) RESULT(hresult)
!THXS_SFX!  CHARACTER(*), INTENT(in) ::  &
!THXS_SFX!    hval
!THXS_SFX!  INTEGER, INTENT(in) ::  &
!THXS_SFX!    knword
!THXS_SFX!  CHARACTER(80), DIMENSION(knword) ::  &
!THXS_SFX!    hresult
!THXS_SFX!END FUNCTION gltools_strsplit
!THXS_SFX!!
!THXS_SFX!END INTERFACE
!THXS_SFX!END MODULE modi_gltools_strsplit
!
! --------------------- END MODULE TOOLS_STRSPLIT ------------------------
!
!
FUNCTION gltools_strsplit( hval,knword ) RESULT(hresult)
!
IMPLICIT NONE
!
 CHARACTER(*), INTENT(in) ::  &
  hval
INTEGER, INTENT(in) ::  &
  knword
 CHARACTER(80), DIMENSION(knword) ::  &
  hresult
!
INTEGER ::  &
  inum,inwords
 CHARACTER(1), PARAMETER ::  &
  ysep=' '
 CHARACTER(LEN=LEN(hval)) ::  &
  ystr
!
!
ystr=hval
inum=0
inwords=0
!
DO WHILE ( inum /= -1 )
  inum=index(trim(ystr),ysep)
  IF ( inum==0 ) THEN
      inum=-1
      IF ( len(trim(ystr)) /= 0 ) THEN
          inwords=inwords+1
          hresult(inwords)=adjustl( trim(ystr) )
      ENDIF
    ELSE
      IF ( inum==1 ) THEN
          ystr=ystr(2:len(ystr))
        ELSE
          inwords=inwords+1
          hresult(inwords)=adjustl( ystr(1:inum-1) )
          ystr=ystr(inum:len(ystr))
      ENDIF
  ENDIF
  IF ( inwords==knword ) THEN
      inum=-1
  ENDIF
END DO
!
END FUNCTION gltools_strsplit