C++*********************************************************************
C
C  GETLBNO.F  
C                              3 DIGITS OK         DEC 2005 ArDean Leith
C
C **********************************************************************
C=* FROM: SPIDER - MODULAR IMAGE PROCESSING SYSTEM.   AUTHOR: J.FRANK  *
C=* Copyright (C) 1985-2005  Health Research Inc.                      *
C=*                                                                    *
C=* HEALTH RESEARCH INCORPORATED (HRI),                                *   
C=* ONE UNIVERSITY PLACE, RENSSELAER, NY 12144-3455.                   *
C=*                                                                    *
C=* Email:  spider@wadsworth.org                                       *
C=*                                                                    *
C=* This program is free software; you can redistribute it and/or      *
C=* modify it under the terms of the GNU General Public License as     *
C=* published by the Free Software Foundation; either version 2 of the *
C=* License, or (at your option) any later version.                    *
C=*                                                                    *
C=* This program is distributed in the hope that it will be useful,    *
C=* but WITHOUT ANY WARRANTY; without even the implied warranty of     *
C=* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  *
C=* General Public License for more details.                           *
C=*                                                                    *
C=* You should have received a copy of the GNU General Public License  *
C=* along with this program; if not, write to the                      *
C=* Free Software Foundation, Inc.,                                    *
C=* 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.      *
C=*                                                                    *
C **********************************************************************
C
C    GETLBNO(STRING,LBNO,IRTFLG)
C
C    PURPOSE:         GET LABEL NUMBER FROM STING
C        
c    PARAMETERS:      STRING  STRING CONTAINING LB NUMBER (ONLY)   (SENT)
C                     LBNO    LABEL NUMBER                     (RETURNED)
C
C--*******************************************************************

	SUBROUTINE GETLBNO(STRING,LBNO,IRTFLG)

        CHARACTER(LEN=*)  :: STRING

        CHARACTER(LEN=80) :: TEMP1
        LOGICAL           :: ISDIGI

        LBNO   = -1
        IRTFLG = 0

C       FIND LAST NON-BLANK            
        NCHAR1 = lnblnk(STRING)

        TEMP1 = STRING(1:NCHAR1)
        CALL SSUPCAS(TEMP1)

        IGO = INDEX(TEMP1,'LB')
        IF (IGO .LE. 0) RETURN

        NCHAR = 1
        IF (ISDIGI(TEMP1(IGO+3:IGO+3))) NCHAR = 2
        IF ((IGO+4) .LT. NCHAR1 .AND. ISDIGI(TEMP1(IGO+4:IGO+4))) THEN
           NCHAR = 3
        ENDIF 

        READ(TEMP1(IGO+2:IGO+2+NCHAR-1),8000) LBNO
8000    FORMAT(I6)

        RETURN
	END