share/fftpack5/fortran/cfftmf.f

   1 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
   2 C
   3 C   FFTPACK 5.0
   4 C
   5 C   Authors:  Paul N. Swarztrauber and Richard A. Valent
   6 C
   7 C   $Id$
   8 C
   9 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
  10
  11       SUBROUTINE CFFTMF (LOT, JUMP, N, INC, C, LENC, WSAVE, LENSAV,
  12      1                  WORK, LENWRK, IER)
  13       INTEGER  LOT, JUMP, N, INC, LENC, LENSAV, LENWRK, IER
  14       COMPLEX  C(LENC)
  15       REAL     WSAVE(LENSAV)     ,WORK(LENWRK)
  16       LOGICAL  XERCON
  17 C
  18       IER = 0
  19 C
  20       IF (LENC .LT. (LOT-1)*JUMP + INC*(N-1) + 1) THEN
  21         IER = 1
  22         CALL XERFFT ('CFFTMF ', 6)
  23       ELSEIF (LENSAV .LT. 2*N + INT(LOG(REAL(N))/LOG(2.)) + 4) THEN
  24         IER = 2
  25         CALL XERFFT ('CFFTMF ', 8)
  26       ELSEIF (LENWRK .LT. 2*LOT*N) THEN
  27         IER = 3
  28         CALL XERFFT ('CFFTMF ', 10)
  29       ELSEIF (.NOT. XERCON(INC,JUMP,N,LOT)) THEN
  30         IER = 4
  31         CALL XERFFT ('CFFTMF ', -1)
  32       ENDIF
  33 C
  34       IF (N .EQ. 1) RETURN
  35 C
  36       IW1 = N+N+1
  37       CALL CMFM1F (LOT,JUMP,N,INC,C,WORK,WSAVE,WSAVE(IW1),
  38      1                           WSAVE(IW1+1))
  39       RETURN
  40       END