!CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
!                                                                       
!   FFTPACK 5.0                                                         
!   Copyright (C) 1995-2004, Scientific Computing Division,             
!   University Corporation for Atmospheric Research                     
!   Licensed under the GNU General Public License (GPL)                 
!                                                                       
!   Authors:  Paul N. Swarztrauber and Richard A. Valent                
!                                                                       
!   $Id: sint1b.f,v 1.2 2004/06/15 21:29:20 rodney Exp $                
!                                                                       
!CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
                                                                        
      SUBROUTINE SINT1B ( N, INC, X, LENX, WSAVE, LENSAV,               &
     &                   WORK, LENWRK, IER)                             
      INTEGER    N, INC, LENX, LENSAV, LENWRK, IER 
      REAL       X(INC,*), WSAVE(LENSAV), WORK(LENWRK) 
!                                                                       
      IER = 0 
!                                                                       
      IF (LENX .LT. INC*(N-1) + 1) THEN 
        IER = 1 
        CALL XERFFT ('SINT1B', 6) 
        GO TO 100 
      ELSEIF (LENSAV .LT. N/2 + N + INT(LOG(REAL(N))) +4) THEN 
        IER = 2 
        CALL XERFFT ('SINT1B', 8) 
        GO TO 100 
      ELSEIF (LENWRK .LT. (2*N+2)) THEN 
        IER = 3 
        CALL XERFFT ('SINT1B', 10) 
        GO TO 100 
      ENDIF 
!                                                                       
      CALL SINTB1(N,INC,X,WSAVE,WORK,WORK(N+2),IER1) 
      IF (IER1 .NE. 0) THEN 
        IER = 20 
        CALL XERFFT ('SINT1B',-5) 
      ENDIF 
!                                                                       
  100 CONTINUE 
      RETURN 
      END