modi_gltools_nwords.F90

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! =======================================================================
! ====================== MODULE modi_gltools_nwords =======================
! =======================================================================
!
!
!   This module contains a function that compute how many words 
! (separated by blanks) there are in a character string.
!
! Created : 05/03/2008 (D. Salas)
! Modified: no
!
! ------------------- BEGIN MODULE modi_gltools_nwords --------------------
!
!THXS_SFX!MODULE modi_gltools_nwords RESULT(nwords)
!THXS_SFX!INTERFACE
!THXS_SFX!!
!THXS_SFX!FUNCTION gltools_nwords( hval )
!THXS_SFX!  CHARACTER(*), INTENT(in) ::  &
!THXS_SFX!    hval
!THXS_SFX!  INTEGER ::  &
!THXS_SFX!    nwords
!THXS_SFX!END FUNCTION gltools_nwords
!THXS_SFX!!
!THXS_SFX!END INTERFACE
!THXS_SFX!END MODULE modi_gltools_nwords
!
! ---------------------- END MODULE TOOLS_NWORDS ------------------------
!
!
FUNCTION gltools_nwords( hval ) RESULT(nwords)
!
IMPLICIT NONE
!
 CHARACTER(*), INTENT(in) ::  &
  hval
INTEGER ::  &
  nwords
!
INTEGER ::  &
  inum
 CHARACTER(1), PARAMETER ::  &
  ysep=' '
 CHARACTER(LEN=LEN(hval)) ::  &
  ystr
!
!
ystr=hval
inum=0
nwords=0
!
DO WHILE ( inum /= -1 )
  inum=index(trim(ystr),ysep)
  IF ( inum==0 ) THEN
      inum=-1
      IF ( len(trim(ystr)) /= 0 ) THEN
          nwords = nwords + 1
      ENDIF
    ELSE
      IF ( inum==1 ) THEN
          ystr=ystr(2:len(ystr))
        ELSE
          nwords = nwords + 1
          ystr=ystr(inum:len(ystr))
      ENDIF
  ENDIF
END DO
!
END FUNCTION gltools_nwords