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annotate libinterp/corefcn/__dsearchn__.cc @ 25688:b2917b7858ba

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maint: Use Octave convention for spacing of C++ cast statements. * PopupMenuControl.cc, __dsearchn__.cc, __magick_read__.cc, cellfun.cc, gl-render.cc, ls-mat5.cc, mex.cc, tsearch.cc, ccolamd.cc, dmperm.cc, ov-bool-mat.h, ov-bool-sparse.cc, ov-cx-mat.cc, ov-cx-sparse.cc, ov-fcn-handle.cc, ov-flt-cx-mat.cc, ov-flt-re-mat.cc, ov-range.cc, ov-re-mat.cc, ov-re-sparse.cc, jit-typeinfo.cc, jit-typeinfo.h, CDiagMatrix.cc, CSparse.cc, MatrixType.h, chNDArray.cc, dDiagMatrix.cc, dNDArray.cc, dSparse.cc, fCDiagMatrix.cc, fDiagMatrix.cc, fNDArray.cc, eigs-base.cc, oct-fftw.cc, sparse-chol.cc, url-transfer.cc: Change cast statements to use no space between cast and '<...>' and one space before the opening '('.
author Rik <rik@octave.org>
date Thu, 26 Jul 2018 16:32:12 -0700
parents cb1606f78f6b
children 00f796120a6d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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3 Copyright (C) 2007-2018 David Bateman
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4
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5 This file is part of Octave.
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6
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7 Octave is free software: you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by
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9 the Free Software Foundation, either version 3 of the License, or
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10 (at your option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but
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13 WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <https://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if defined (HAVE_CONFIG_H)
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24 # include "config.h"
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25 #endif
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26
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27 #include <cmath>
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28
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29 #include <string>
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30
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31 #include "defun.h"
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32 #include "error.h"
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33 #include "ovl.h"
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35 DEFUN (__dsearchn__, args, ,
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36 doc: /* -*- texinfo -*-
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37 @deftypefn {} {[@var{idx}, @var{d}] =} dsearch (@var{x}, @var{xi})
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38 Undocumented internal function.
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39 @end deftypefn */)
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40 {
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41 if (args.length () != 2)
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42 print_usage ();
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43
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44 Matrix x = args(0).matrix_value ().transpose ();
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45 Matrix xi = args(1).matrix_value ().transpose ();
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46
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47 if (x.rows () != xi.rows () || x.columns () < 1)
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48 error ("__dsearch__: number of rows of X and XI must match");
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49
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50 octave_idx_type n = x.rows ();
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51 octave_idx_type nx = x.columns ();
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52 octave_idx_type nxi = xi.columns ();
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53
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54 ColumnVector idx (nxi);
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55 double *pidx = idx.fortran_vec ();
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56 ColumnVector dist (nxi);
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57 double *pdist = dist.fortran_vec ();
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58
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59 #define DIST(dd, y, yi, m) \
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60 dd = 0.0; \
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61 for (octave_idx_type k = 0; k < m; k++) \
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62 { \
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63 double yd = y[k] - yi[k]; \
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64 dd += yd * yd; \
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65 } \
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66 dd = sqrt (dd)
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67
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68 const double *pxi = xi.fortran_vec ();
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69 for (octave_idx_type i = 0; i < nxi; i++)
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70 {
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71 double d0;
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72 const double *px = x.fortran_vec ();
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73 DIST(d0, px, pxi, n);
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74 *pidx = 1.;
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75 for (octave_idx_type j = 1; j < nx; j++)
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76 {
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77 px += n;
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78 double d;
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79 DIST (d, px, pxi, n);
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80 if (d < d0)
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81 {
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82 d0 = d;
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83 *pidx = static_cast<double> (j + 1);
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84 }
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85 octave_quit ();
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86 }
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87
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88 *pdist++ = d0;
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89 pidx++;
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90 pxi += n;
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91 }
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92
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93 return ovl (idx, dist);
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94 }
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95
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96 /*
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97 ## No test needed for internal helper function.
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98 %!assert (1)
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99 */