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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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_octave_iostream_h) |
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25 #define octave_octave_iostream_h 1 |
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26 |
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27 #include <iostream> |
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28 |
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29 #include "oct-stream.h" |
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30 |
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31 class |
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32 octave_base_iostream : public octave_base_stream |
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33 { |
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34 public: |
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35 |
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36 octave_base_iostream (const std::string& n = std::string (), |
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37 std::ios::openmode m = std::ios::in|std::ios::out, |
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38 oct_mach_info::float_format ff |
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39 = oct_mach_info::native_float_format ()) |
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40 : octave_base_stream (m, ff), nm (n) { } |
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41 |
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42 // Position a stream at OFFSET relative to ORIGIN. |
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43 |
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44 int seek (long offset, int origin); |
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45 |
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46 // Return current stream position. |
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47 |
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48 long tell (void); |
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49 |
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50 // Return non-zero if EOF has been reached on this stream. |
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51 |
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52 bool eof (void) const; |
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53 |
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54 // The name of the file. |
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55 |
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56 std::string name (void) const { return nm; } |
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57 |
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58 protected: |
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59 |
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60 ~octave_base_iostream (void) { } |
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61 |
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62 void invalid_operation (void) const; |
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63 |
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64 private: |
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65 |
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66 std::string nm; |
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67 |
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68 virtual const char *stream_type (void) const = 0; |
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69 |
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70 // No copying! |
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71 |
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72 octave_base_iostream (const octave_base_iostream&); |
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73 |
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74 octave_base_iostream& operator = (const octave_base_iostream&); |
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75 }; |
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76 |
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77 class |
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78 octave_istream : public octave_base_iostream |
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79 { |
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80 public: |
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81 |
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82 octave_istream (std::istream *arg = 0, const std::string& n = std::string ()) |
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83 : octave_base_iostream (n, std::ios::in, |
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84 oct_mach_info::native_float_format ()), |
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85 is (arg) |
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86 { } |
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87 |
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88 static octave_stream |
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89 create (std::istream *arg = 0, const std::string& n = std::string ()); |
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90 |
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91 // Return non-zero if EOF has been reached on this stream. |
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92 |
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93 bool eof (void) const; |
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94 |
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95 std::istream *input_stream (void) { return is; } |
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96 |
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97 std::ostream *output_stream (void) { return 0; } |
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98 |
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99 protected: |
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100 |
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101 ~octave_istream (void) { } |
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102 |
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103 private: |
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104 |
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105 std::istream *is; |
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106 |
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107 const char *stream_type (void) const { return "octave_istream"; } |
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108 |
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109 // No copying! |
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110 |
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111 octave_istream (const octave_istream&); |
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112 |
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113 octave_istream& operator = (const octave_istream&); |
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114 }; |
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115 |
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116 class |
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117 octave_ostream : public octave_base_iostream |
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118 { |
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119 public: |
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120 |
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121 octave_ostream (std::ostream *arg, const std::string& n = std::string ()) |
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122 : octave_base_iostream (n, std::ios::out, |
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123 oct_mach_info::native_float_format ()), |
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124 os (arg) |
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125 { } |
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126 |
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127 static octave_stream |
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128 create (std::ostream *arg, const std::string& n = std::string ()); |
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129 |
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130 // Return non-zero if EOF has been reached on this stream. |
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131 |
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132 bool eof (void) const; |
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133 |
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134 std::istream *input_stream (void) { return 0; } |
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135 |
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136 std::ostream *output_stream (void) { return os; } |
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137 |
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138 protected: |
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139 |
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140 ~octave_ostream (void) { } |
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141 |
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142 private: |
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143 |
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144 std::ostream *os; |
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145 |
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146 const char *stream_type (void) const { return "octave_ostream"; } |
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147 |
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148 // No copying! |
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149 |
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150 octave_ostream (const octave_ostream&); |
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151 |
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152 octave_ostream& operator = (const octave_ostream&); |
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153 }; |
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154 |
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155 #endif |
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156 |
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157 /* |
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158 ;;; Local Variables: *** |
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159 ;;; mode: C++ *** |
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160 ;;; End: *** |
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161 */ |
