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annotate liboctave/bsxfun.h @ 14101:ff5588774680 stable ss-3-5-91

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snapshot 3.5.91 * configure.ac (AC_INIT): Version is now 3.5.91. (OCTAVE_RELEASE_DATE): Now 2011-12-23.
author John W. Eaton <jwe@octave.org>
date Fri, 23 Dec 2011 19:24:41 -0500
parents c3d401562410
children 951eacaf9381
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1 /*
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2
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3 Copyright (C) 2011 Jordi Gutiérrez Hermoso <jordigh@octave.org>
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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 the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 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 WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 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 <http://www.gnu.org/licenses/>.
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20
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21 */
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22 #if !defined (bsxfun_h)
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23 #define bsxfun_h 1
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24
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25 #include <algorithm>
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26
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27 #include "Array.h"
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28 #include "dim-vector.h"
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29 #include "lo-error.h"
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30
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31 inline
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32 bool
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33 is_valid_bsxfun (const std::string& name, const dim_vector& dx,
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34 const dim_vector& dy)
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35 {
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36 for (int i = 0; i < std::min (dx.length (), dy.length ()); i++)
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37 {
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38 octave_idx_type xk = dx(i), yk = dy(i);
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39 // Check the three conditions for valid bsxfun dims
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40 if (! ( (xk == yk) || (xk == 1 && yk > 1) || (xk > 1 && yk == 1)))
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41 return false;
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42 }
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43
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44 (*current_liboctave_warning_with_id_handler)
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45 ("Octave:auto-bsxfun", "%s: automatic broadcasting operation applied", name.c_str ());
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46
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47 return true;
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48 }
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49
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50 // since we can't change the size of the assigned-to matrix, we cannot
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51 // apply singleton expansion to it, so the conditions to check are
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52 // different here.
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53 inline
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54 bool
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55 is_valid_inplace_bsxfun (const std::string& name, const dim_vector& dr,
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56 const dim_vector& dx)
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57 {
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58 octave_idx_type drl = dr.length (), dxl = dx.length ();
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59 if (drl < dxl)
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60 return false;
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61
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62 for (int i = 0; i < drl; i++)
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63 {
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64 octave_idx_type rk = dr(i), xk = dx(i);
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65
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66 // Only two valid canditions to check; can't stretch rk
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67 if (! ( (rk == xk) || (rk > 1 && xk == 1)))
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68 return false;
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69 }
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70
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71 (*current_liboctave_warning_with_id_handler)
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72 ("Octave:auto-bsxfun", "%s: automatic broadcasting operation applied", name.c_str ());
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73
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74 return true;
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75 }
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76
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77 #include "bsxfun-defs.cc"
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78
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79 #endif