Mercurial > jwe > octave
view libinterp/corefcn/__pchip_deriv__.cc @ 20853:1142cf6abc0d
2015 Code Sprint: remove class of function from docstring for all C++ files.
author | Rik <rik@octave.org> |
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date | Sat, 12 Dec 2015 07:40:03 -0800 |
parents | 35241c4b696c |
children | 48b2ad5ee801 |
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/* Copyright (C) 2002-2015 Kai Habel Copyright (C) 2008-2009 Jaroslav Hajek 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/>. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include "defun.h" #include "error.h" #include "gripes.h" #include "oct-obj.h" #include "utils.h" #include "f77-fcn.h" extern "C" { F77_RET_T F77_FUNC (dpchim, DPCHIM) (const octave_idx_type& n, const double *x, const double *f, double *d, const octave_idx_type &incfd, octave_idx_type *ierr); F77_RET_T F77_FUNC (pchim, PCHIM) (const octave_idx_type& n, const float *x, const float *f, float *d, const octave_idx_type& incfd, octave_idx_type *ierr); } // Wrapper for SLATEC/PCHIP function DPCHIM to calculate the derivates // for piecewise polynomials. DEFUN (__pchip_deriv__, args, , "-*- texinfo -*-\n\ @deftypefn {} {} __pchip_deriv__ (@var{x}, @var{y}, @var{dim})\n\ Undocumented internal function.\n\ @end deftypefn") { octave_value retval; const int nargin = args.length (); bool rows = (nargin == 3 && args(2).uint_value () == 2); if (nargin >= 2) { if (args(0).is_single_type () || args(1).is_single_type ()) { FloatColumnVector xvec (args(0).float_vector_value ()); FloatMatrix ymat (args(1).float_matrix_value ()); octave_idx_type nx = xvec.numel (); if (nx < 2) error ("__pchip_deriv__: X must be at least of length 2"); octave_idx_type nyr = ymat.rows (); octave_idx_type nyc = ymat.columns (); if (nx != (rows ? nyc : nyr)) error ("__pchip_deriv__: X and Y dimension mismatch"); FloatMatrix dmat (nyr, nyc); octave_idx_type ierr; const octave_idx_type incfd = rows ? nyr : 1; volatile const octave_idx_type inc = rows ? 1 : nyr; volatile octave_idx_type k = 0; for (volatile octave_idx_type i = (rows ? nyr : nyc); i > 0; i--) { F77_XFCN (pchim, PCHIM, (nx, xvec.data (), ymat.data () + k * inc, dmat.fortran_vec () + k * inc, incfd, &ierr)); k++; if (ierr < 0) error ("__pchip_deriv__: PCHIM failed with ierr = %i", ierr); } retval = dmat; } else { ColumnVector xvec (args(0).vector_value ()); Matrix ymat (args(1).matrix_value ()); octave_idx_type nx = xvec.numel (); if (nx < 2) error ("__pchip_deriv__: X must be at least of length 2"); octave_idx_type nyr = ymat.rows (); octave_idx_type nyc = ymat.columns (); if (nx != (rows ? nyc : nyr)) error ("__pchip_deriv__: X and Y dimension mismatch"); Matrix dmat (nyr, nyc); octave_idx_type ierr; const octave_idx_type incfd = rows ? nyr : 1; volatile const octave_idx_type inc = rows ? 1 : nyr; volatile octave_idx_type k = 0; for (volatile octave_idx_type i = (rows ? nyr : nyc); i > 0; i--) { F77_XFCN (dpchim, DPCHIM, (nx, xvec.data (), ymat.data () + k * inc, dmat.fortran_vec () + k * inc, incfd, &ierr)); k++; if (ierr < 0) error ("__pchip_deriv__: DPCHIM failed with ierr = %i", ierr); } retval = dmat; } } return retval; } /* ## No test needed for internal helper function. %!assert (1) */