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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 (octave_file_h) |
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24 #define octave_file_h 1 |
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25 |
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26 #include <cstdlib> |
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27 |
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28 #include <iostream> |
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29 #include <string> |
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30 |
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31 #include "oct-alloc.h" |
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32 #include "oct-stream.h" |
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33 #include "ov-base.h" |
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34 #include "ov-scalar.h" |
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35 #include "ov-typeinfo.h" |
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36 |
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37 class tree_walker; |
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38 class octave_stream; |
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39 class octave_value; |
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40 class octave_value_list; |
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41 |
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42 // Lists. |
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43 |
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44 class |
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45 octave_file : public octave_base_value |
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46 { |
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47 public: |
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48 |
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49 octave_file (void) |
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50 : octave_base_value (), stream (), number (-1) { } |
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51 |
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52 octave_file (const octave_stream& s, int n) |
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53 : octave_base_value (), stream (s), number (n) { } |
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54 |
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55 octave_file (const octave_file& f) |
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56 : octave_base_value (), stream (f.stream), number (f.number) { } |
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57 |
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58 ~octave_file (void) { } |
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59 |
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60 octave_value *clone (void) const { return new octave_file (*this); } |
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61 |
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62 // For compatibility, a file object should appear as if it is a |
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63 // scalar object, in contexts where that is needed. |
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64 octave_value *empty_clone (void) const { return new octave_scalar (); } |
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65 |
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66 type_conv_fcn numeric_conversion_function (void) const; |
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67 |
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68 double double_value (bool) const { return number; } |
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69 |
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70 double scalar_value (bool) const { return number; } |
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71 |
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72 octave_stream stream_value (void) const { return stream; } |
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73 |
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74 int stream_number (void) const { return number; } |
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75 |
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76 bool is_defined (void) const { return true; } |
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77 |
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78 bool is_stream (void) const { return true; } |
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79 |
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80 // Pretend we are a real scalar for better compatibility, maybe. |
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81 |
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82 bool is_real_scalar (void) const { return true; } |
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83 |
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84 bool is_real_type (void) const { return true; } |
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85 |
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86 dim_vector dims (void) const { static dim_vector dv (1, 1); return dv; } |
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87 |
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88 octave_value all (int = 0) const { return (number != 0.0); } |
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89 |
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90 octave_value any (int = 0) const { return (number != 0.0); } |
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91 |
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92 void print (std::ostream& os, bool pr_as_read_syntax = false) const; |
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93 |
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94 void print_raw (std::ostream& os, bool pr_as_read_syntax = false) const; |
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95 |
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96 bool print_name_tag (std::ostream& os, const std::string& name) const; |
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97 |
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98 private: |
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99 |
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100 // The stream object. |
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101 octave_stream stream; |
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102 |
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103 // The number of the beast. |
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104 int number; |
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105 |
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106 DECLARE_OCTAVE_ALLOCATOR |
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107 |
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108 DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA |
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109 }; |
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110 |
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111 #endif |
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112 |
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113 /* |
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114 ;;; Local Variables: *** |
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115 ;;; mode: C++ *** |
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116 ;;; End: *** |
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117 */ |
