| 1 | !CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC |
|---|
| 2 | ! |
|---|
| 3 | ! FFTPACK 5.0 |
|---|
| 4 | ! Copyright (C) 1995-2004, Scientific Computing Division, |
|---|
| 5 | ! University Corporation for Atmospheric Research |
|---|
| 6 | ! Licensed under the GNU General Public License (GPL) |
|---|
| 7 | ! |
|---|
| 8 | ! Authors: Paul N. Swarztrauber and Richard A. Valent |
|---|
| 9 | ! |
|---|
| 10 | ! $Id: cfftmb.f,v 1.2 2004/06/15 21:08:32 rodney Exp $ |
|---|
| 11 | ! |
|---|
| 12 | !CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC |
|---|
| 13 | |
|---|
| 14 | SUBROUTINE CFFTMB (LOT, JUMP, N, INC, C, LENC, WSAVE, LENSAV, & |
|---|
| 15 | & WORK, LENWRK, IER) |
|---|
| 16 | INTEGER LOT, JUMP, N, INC, LENC, LENSAV, LENWRK, IER |
|---|
| 17 | COMPLEX C(LENC) |
|---|
| 18 | REAL WSAVE(LENSAV) ,WORK(LENWRK) |
|---|
| 19 | LOGICAL XERCON |
|---|
| 20 | ! |
|---|
| 21 | IER = 0 |
|---|
| 22 | ! |
|---|
| 23 | IF (LENC .LT. (LOT-1)*JUMP + INC*(N-1) + 1) THEN |
|---|
| 24 | IER = 1 |
|---|
| 25 | CALL XERFFT ('CFFTMB ', 6) |
|---|
| 26 | ELSEIF (LENSAV .LT. 2*N + INT(LOG(REAL(N))) + 4) THEN |
|---|
| 27 | IER = 2 |
|---|
| 28 | CALL XERFFT ('CFFTMB ', 8) |
|---|
| 29 | ELSEIF (LENWRK .LT. 2*LOT*N) THEN |
|---|
| 30 | IER = 3 |
|---|
| 31 | CALL XERFFT ('CFFTMB ', 10) |
|---|
| 32 | ELSEIF (.NOT. XERCON(INC,JUMP,N,LOT)) THEN |
|---|
| 33 | IER = 4 |
|---|
| 34 | CALL XERFFT ('CFFTMB ', -1) |
|---|
| 35 | ENDIF |
|---|
| 36 | ! |
|---|
| 37 | IF (N .EQ. 1) RETURN |
|---|
| 38 | ! |
|---|
| 39 | IW1 = N+N+1 |
|---|
| 40 | CALL CMFM1B (LOT,JUMP,N,INC,C,WORK,WSAVE,WSAVE(IW1), & |
|---|
| 41 | & WSAVE(IW1+1)) |
|---|
| 42 | RETURN |
|---|
| 43 | END |
|---|
