/usr/include/octave-4.2.2/octave/lo-fftpack-proto.h is in liboctave-dev 4.2.2-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | /*
Copyright (C) 2016-2017 John W. Eaton
This file is part of Octave.
Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
Octave is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>.
*/
#if ! defined (octave_lo_fftpack_proto_h)
#define octave_lo_fftpack_proto_h 1
#include "octave-config.h"
#include "f77-fcn.h"
extern "C"
{
// Note that the original complex fft routines were not written for
// float or double complex arguments. They have been modified by
// adding an implicit float or double precision (a-h,o-z) statement
// at the beginning of each subroutine.
// FFTB
F77_RET_T
F77_FUNC (cfftb, CFFTB) (const F77_INT&, F77_CMPLX*, F77_CMPLX*);
F77_RET_T
F77_FUNC (zfftb, ZFFTB) (const F77_INT&, F77_DBLE_CMPLX*, F77_DBLE_CMPLX*);
// FFTF
F77_RET_T
F77_FUNC (cfftf, CFFTF) (const F77_INT&, F77_CMPLX*, F77_CMPLX*);
F77_RET_T
F77_FUNC (zfftf, ZFFTF) (const F77_INT&, F77_DBLE_CMPLX*, F77_DBLE_CMPLX*);
// FFTI
F77_RET_T
F77_FUNC (cffti, CFFTI) (const F77_INT&, F77_CMPLX*);
F77_RET_T
F77_FUNC (zffti, ZFFTI) (const F77_INT&, F77_DBLE_CMPLX*);
}
#endif
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