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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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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 2, or (at your option) any |
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10 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, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) |
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24 #pragma implementation |
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25 #endif |
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26 |
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27 #ifdef HAVE_CONFIG_H |
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28 #include <config.h> |
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29 #endif |
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30 |
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31 #include <iostream> |
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32 |
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33 #include "defun.h" |
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34 #include "gripes.h" |
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35 #include "oct-obj.h" |
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36 #include "ov-scalar.h" |
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37 #include "ov-base.h" |
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38 #include "ov-base-scalar.h" |
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39 #include "ov-base-scalar.cc" |
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40 #include "ov-re-mat.h" |
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41 #include "ov-typeinfo.h" |
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42 #include "pr-output.h" |
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43 #include "xdiv.h" |
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44 #include "xpow.h" |
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45 |
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46 template class octave_base_scalar<double>; |
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47 |
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48 DEFINE_OCTAVE_ALLOCATOR (octave_scalar); |
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49 |
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50 DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_scalar, "scalar"); |
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51 |
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52 octave_value |
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53 octave_scalar::do_index_op (const octave_value_list& idx, int resize_ok) |
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54 { |
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55 octave_value retval; |
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56 |
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57 if (idx.valid_scalar_indices ()) |
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58 retval = scalar; |
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59 else |
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60 { |
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61 // XXX FIXME XXX -- this doesn't solve the problem of |
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62 // |
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63 // a = 1; a([1,1], [1,1], [1,1]) |
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64 // |
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65 // and similar constructions. Hmm... |
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66 |
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67 // XXX FIXME XXX -- using this constructor avoids narrowing the |
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68 // 1x1 matrix back to a scalar value. Need a better solution |
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69 // to this problem. |
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70 |
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71 octave_value tmp (new octave_matrix (matrix_value ())); |
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72 |
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73 retval = tmp.do_index_op (idx, resize_ok); |
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74 } |
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75 |
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76 return retval; |
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77 } |
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78 |
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79 octave_value |
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80 octave_scalar::convert_to_str_internal (bool, bool) const |
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81 { |
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82 octave_value retval; |
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83 |
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84 if (xisnan (scalar)) |
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85 ::error ("invalid conversion from NaN to character"); |
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86 else |
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87 { |
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88 int ival = NINT (scalar); |
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89 |
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90 if (ival < 0 || ival > UCHAR_MAX) |
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91 { |
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92 // XXX FIXME XXX -- is there something better we could do? |
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93 |
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94 ival = 0; |
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95 |
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96 ::warning ("range error for conversion to character value"); |
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97 } |
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98 |
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99 retval = octave_value (std::string (1, static_cast<char> (ival))); |
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100 } |
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101 |
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102 return retval; |
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103 } |
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104 |
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105 /* |
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106 ;;; Local Variables: *** |
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107 ;;; mode: C++ *** |
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108 ;;; End: *** |
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109 */ |
