! $Id$

! Module/Routines extracted from IOIPSL v2_1_8

MODULE ioipsl_stringop
!-
!$Id: stringop.f90 386 2008-09-04 08:38:48Z bellier $
!-
! This software is governed by the CeCILL license
! See IOIPSL/IOIPSL_License_CeCILL.txt
!---------------------------------------------------------------------
!-
  INTEGER,DIMENSION(30) :: &
   prime=(/1,2,3,5,7,11,13,17,19,23,29,31,37,41,43, &
   47,53,59,61,67,71,73,79,83,89,97,101,103,107,109/)
!-
!---------------------------------------------------------------------
CONTAINS
!=
SUBROUTINE cmpblank (str)
!---------------------------------------------------------------------
!- Compact blanks
!---------------------------------------------------------------------
  CHARACTER(LEN=*),INTENT(inout) :: str
!-
  INTEGER :: lcc,ipb
!---------------------------------------------------------------------
  lcc = LEN_TRIM(str)
  ipb = 1
  DO
    IF (ipb >= lcc)   EXIT
    IF (str(ipb:ipb+1) == '  ') THEN
      str(ipb+1:) = str(ipb+2:lcc)
      lcc = lcc-1
    ELSE
      ipb = ipb+1
    ENDIF
  ENDDO
!----------------------
END SUBROUTINE cmpblank
!===
INTEGER FUNCTION cntpos (c_c,l_c,c_r,l_r)
!---------------------------------------------------------------------
!- Finds number of occurences of c_r in c_c
!---------------------------------------------------------------------
  IMPLICIT NONE
!-
  CHARACTER(LEN=*),INTENT(in) :: c_c
  INTEGER,INTENT(IN) :: l_c
  CHARACTER(LEN=*),INTENT(in) :: c_r
  INTEGER,INTENT(IN) :: l_r
!-
  INTEGER :: ipos,indx
!---------------------------------------------------------------------
  cntpos = 0
  ipos   = 1
  DO
    indx = INDEX(c_c(ipos:l_c),c_r(1:l_r))
    IF (indx > 0) THEN
      cntpos = cntpos+1
      ipos   = ipos+indx+l_r-1
    ELSE
      EXIT
    ENDIF
  ENDDO
!------------------
END FUNCTION cntpos
!===
INTEGER FUNCTION findpos (c_c,l_c,c_r,l_r)
!---------------------------------------------------------------------
!- Finds position of c_r in c_c
!---------------------------------------------------------------------
  IMPLICIT NONE
!-
  CHARACTER(LEN=*),INTENT(in) :: c_c
  INTEGER,INTENT(IN) :: l_c
  CHARACTER(LEN=*),INTENT(in) :: c_r
  INTEGER,INTENT(IN) :: l_r
!---------------------------------------------------------------------
  findpos = INDEX(c_c(1:l_c),c_r(1:l_r))
  IF (findpos == 0)  findpos=-1
!-------------------
END FUNCTION findpos
!===
SUBROUTINE find_str (str_tab,str,pos)
!---------------------------------------------------------------------
!- This subroutine looks for a string in a table
!---------------------------------------------------------------------
!- INPUT
!-   str_tab  : Table  of strings
!-   str      : Target we are looking for
!- OUTPUT
!-   pos      : -1 if str not found, else value in the table
!---------------------------------------------------------------------
  IMPLICIT NONE
!-
  CHARACTER(LEN=*),DIMENSION(:),INTENT(in) :: str_tab
  CHARACTER(LEN=*),INTENT(in) :: str
  INTEGER,INTENT(out) :: pos
!-
  INTEGER :: nb_str,i
!---------------------------------------------------------------------
  pos = -1
  nb_str=SIZE(str_tab)
  IF ( nb_str > 0 ) THEN
    DO i=1,nb_str
      IF ( TRIM(str_tab(i)) == TRIM(str) ) THEN
        pos = i
        EXIT
      ENDIF
    ENDDO
  ENDIF
!----------------------
END SUBROUTINE find_str
!===
SUBROUTINE nocomma (str)
!---------------------------------------------------------------------
!- Replace commas with blanks
!---------------------------------------------------------------------
  IMPLICIT NONE
!-
  CHARACTER(LEN=*) :: str
!-
  INTEGER :: i
!---------------------------------------------------------------------
  DO i=1,LEN_TRIM(str)
    IF (str(i:i) == ',')   str(i:i) = ' '
  ENDDO
!---------------------
END SUBROUTINE nocomma
!===
SUBROUTINE strlowercase (str)
!---------------------------------------------------------------------
!- Converts a string into lowercase
!---------------------------------------------------------------------
  IMPLICIT NONE
!-
  CHARACTER(LEN=*) :: str
!-
  INTEGER :: i,ic
!---------------------------------------------------------------------
  DO i=1,LEN_TRIM(str)
    ic = IACHAR(str(i:i))
    IF ( (ic >= 65).AND.(ic <= 90) )  str(i:i) = ACHAR(ic+32)
  ENDDO
!--------------------------
END SUBROUTINE strlowercase
!===
SUBROUTINE struppercase (str)
!---------------------------------------------------------------------
!- Converts a string into uppercase
!---------------------------------------------------------------------
  IMPLICIT NONE
!-
  CHARACTER(LEN=*) :: str
!-
  INTEGER :: i,ic
!---------------------------------------------------------------------
  DO i=1,LEN_TRIM(str)
    ic = IACHAR(str(i:i))
    IF ( (ic >= 97).AND.(ic <= 122) )  str(i:i) = ACHAR(ic-32)
  ENDDO
!--------------------------
END SUBROUTINE struppercase
!===
SUBROUTINE gensig (str,sig)
!---------------------------------------------------------------------
!- Generate a signature from the first 30 characters of the string
!- This signature is not unique and thus when one looks for the
!- one needs to also verify the string.
!---------------------------------------------------------------------
  IMPLICIT NONE
!-
  CHARACTER(LEN=*) :: str
  INTEGER          :: sig
!-
  INTEGER :: i
!---------------------------------------------------------------------
  sig = 0
  DO i=1,MIN(LEN_TRIM(str),30)
    sig = sig + prime(i)*IACHAR(str(i:i))
  ENDDO
!--------------------
END SUBROUTINE gensig
!===
SUBROUTINE find_sig (nb_sig,str_tab,str,sig_tab,sig,pos)
!---------------------------------------------------------------------
!- Find the string signature in a list of signatures
!---------------------------------------------------------------------
!- INPUT
!-   nb_sig      : length of table of signatures
!-   str_tab     : Table of strings
!-   str         : Target string we are looking for
!-   sig_tab     : Table of signatures
!-   sig         : Target signature we are looking for
!- OUTPUT
!-   pos         : -1 if str not found, else value in the table
!---------------------------------------------------------------------
  IMPLICIT NONE
!-
  INTEGER :: nb_sig
  CHARACTER(LEN=*),DIMENSION(nb_sig) :: str_tab
  CHARACTER(LEN=*) :: str
  INTEGER,DIMENSION(nb_sig) :: sig_tab
  INTEGER :: sig
!-
  INTEGER :: pos
  INTEGER,DIMENSION(nb_sig) :: loczeros
!-
  INTEGER :: il,len
  INTEGER,DIMENSION(1) :: minpos
!---------------------------------------------------------------------
  pos = -1
  il = LEN_TRIM(str)
!-
  IF ( nb_sig > 0 ) THEN
    loczeros = ABS(sig_tab(1:nb_sig)-sig)
    IF ( COUNT(loczeros < 1) == 1 ) THEN
      minpos = MINLOC(loczeros)
      len = LEN_TRIM(str_tab(minpos(1)))
      IF (     (INDEX(str_tab(minpos(1)),str(1:il)) > 0) &
          .AND.(len == il) ) THEN
        pos = minpos(1)
      ENDIF
    ELSE IF ( COUNT(loczeros < 1) > 1 ) THEN
      DO WHILE (COUNT(loczeros < 1) >= 1 .AND. pos < 0 )
        minpos = MINLOC(loczeros)
        len = LEN_TRIM(str_tab(minpos(1)))
        IF (     (INDEX(str_tab(minpos(1)),str(1:il)) > 0) &
            .AND.(len == il) ) THEN
          pos = minpos(1)
        ELSE
          loczeros(minpos(1)) = 99999
        ENDIF
      ENDDO
    ENDIF
  ENDIF
!-----------------------
 END SUBROUTINE find_sig
!===
!------------------
END MODULE ioipsl_stringop