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annotate libinterp/corefcn/pager.h @ 33623:4517f929c59d bytecode-interpreter tip

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maint: Merge default to bytecode-interpreter
author Arun Giridhar <arungiridhar@gmail.com>
date Fri, 24 May 2024 16:22:41 -0400
parents 4b601ca024d5
children
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1993-2024 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
1
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25
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26 #if ! defined (octave_pager_h)
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27 #define octave_pager_h 1
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28
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29 #include "octave-config.h"
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30
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31 #include <fstream>
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32 #include <iosfwd>
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33 #include <sstream>
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34 #include <string>
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35
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36 class octave_value;
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37 class octave_value_list;
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38
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39 OCTAVE_BEGIN_NAMESPACE(octave)
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40
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41 class interpreter;
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42 class oprocstream;
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43
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44 class OCTINTERP_API pager_buf : public std::stringbuf
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45 {
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46 public:
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47
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48 pager_buf () : std::stringbuf (), m_diary_skip (0) { }
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49
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50 OCTAVE_DISABLE_COPY_MOVE (pager_buf)
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51
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52 ~pager_buf () = default;
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53
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54 void flush_current_contents_to_diary ();
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55
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56 void set_diary_skip ();
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57
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58 protected:
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60 int sync ();
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61
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62 private:
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63
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64 std::size_t m_diary_skip;
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65 };
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66
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67 class OCTINTERP_API pager_stream : public std::ostream
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68 {
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69 public:
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71 pager_stream ();
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72
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73 OCTAVE_DISABLE_COPY_MOVE (pager_stream)
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74
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75 ~pager_stream ();
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76
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77 void flush_current_contents_to_diary ();
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78
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79 void set_diary_skip ();
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81 std::ostream& stream ();
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82
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83 void reset ();
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85 private:
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86
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87 pager_buf *m_pb;
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88 };
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89
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90 class OCTINTERP_API diary_buf : public std::stringbuf
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91 {
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92 public:
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93
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94 OCTAVE_DEFAULT_CONSTRUCT_DELETE (diary_buf)
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95 OCTAVE_DISABLE_COPY_MOVE (diary_buf)
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96
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97 protected:
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98
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99 int sync ();
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100 };
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101
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102 class OCTINTERP_API diary_stream : public std::ostream
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103 {
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104 public:
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105
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106 diary_stream ();
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107
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108 OCTAVE_DISABLE_COPY_MOVE (diary_stream)
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109
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110 ~diary_stream ();
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111
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112 std::ostream& stream ();
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113
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114 void reset ();
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115
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116 private:
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117
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118 diary_buf *m_db;
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119 };
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120
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121 extern OCTINTERP_API void flush_stdout ();
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122
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123 class output_system
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124 {
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125 public:
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126
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127 output_system (interpreter& interp);
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128
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129 OCTAVE_DISABLE_CONSTRUCT_COPY_MOVE (output_system)
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130
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131 ~output_system () = default;
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132
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133 pager_stream& pager () { return m_pager_stream; }
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134
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135 diary_stream& diary () { return m_diary_stream; }
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136
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137 std::string diary_file_name () const { return m_diary_file_name; }
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138
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139 std::string diary_file_name (const std::string& nm)
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140 {
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141 std::string val = m_diary_file_name;
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142 m_diary_file_name = nm.empty () ? "diary" : nm;
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143 return val;
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144 }
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145
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146 octave_value PAGER (const octave_value_list& args, int nargout);
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147
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148 std::string PAGER () const { return m_PAGER; }
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149
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150 std::string PAGER (const std::string& s)
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151 {
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152 std::string val = m_PAGER;
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153 m_PAGER = s;
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154 return val;
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155 }
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156
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157 octave_value PAGER_FLAGS (const octave_value_list& args, int nargout);
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158
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159 std::string PAGER_FLAGS () const { return m_PAGER_FLAGS; }
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160
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161 std::string PAGER_FLAGS (const std::string& s)
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162 {
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163 std::string val = m_PAGER_FLAGS;
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164 m_PAGER_FLAGS = s;
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165 return val;
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166 }
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167
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168 octave_value page_output_immediately (const octave_value_list& args,
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169 int nargout);
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170
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171 bool page_output_immediately () const
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172 {
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173 return m_page_output_immediately;
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174 }
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175
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176 bool page_output_immediately (bool flag)
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177 {
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178 bool val = m_page_output_immediately;
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179 m_page_output_immediately = flag;
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180 return val;
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181 }
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182
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183 octave_value page_screen_output (const octave_value_list& args,
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184 int nargout);
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185
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186 bool page_screen_output () const { return m_page_screen_output; }
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187
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188 bool page_screen_output (bool flag)
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189 {
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190 bool val = m_page_screen_output;
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191 m_page_screen_output = flag;
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192 return val;
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193 }
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194
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195 bool write_to_diary_file () const
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196 {
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197 return m_write_to_diary_file;
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198 }
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199
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200 bool write_to_diary_file (bool flag)
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201 {
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202 bool val = m_write_to_diary_file;
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203 m_write_to_diary_file = flag;
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204 return val;
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205 }
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206
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207 bool really_flush_to_pager () const
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208 {
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209 return m_really_flush_to_pager;
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210 }
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211
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212 bool really_flush_to_pager (bool flag)
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213 {
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214 bool val = m_really_flush_to_pager;
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215 m_really_flush_to_pager = flag;
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216 return val;
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217 }
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218
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219 bool flushing_output_to_pager () const
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220 {
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221 return m_flushing_output_to_pager;
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222 }
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223
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224 bool flushing_output_to_pager (bool flag)
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225 {
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226 bool val = m_flushing_output_to_pager;
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227 m_flushing_output_to_pager = flag;
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228 return val;
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229 }
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230
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231 std::string pager_command () const;
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232
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233 std::ofstream& external_diary_file () { return m_external_diary_file; }
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234
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235 void reset ();
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236
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237 void flush_stdout ();
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238
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239 bool sync (const char *msg, int len);
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240
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241 void clear_external_pager ();
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242
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243 void open_diary ();
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244
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245 void close_diary ();
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246
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247 std::ostream& __stdout__ () { return m_pager_stream.stream (); }
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248
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249 std::ostream& __diary__ () { return m_diary_stream.stream (); }
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250
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251 private:
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252
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253 interpreter& m_interpreter;
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254
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255 pager_stream m_pager_stream;
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256
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257 diary_stream m_diary_stream;
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258
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259 // Our actual connection to the external pager.
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260 oprocstream *m_external_pager = nullptr;
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261
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262 // The diary file.
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263 std::ofstream m_external_diary_file;
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264
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265 // The name of the current diary file.
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266 std::string m_diary_file_name;
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267
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268 // The shell command to run as the pager.
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269 std::string m_PAGER;
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270
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271 // The options to pass to the pager.
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272 std::string m_PAGER_FLAGS;
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273
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274 // TRUE means that if output is going to the pager, it is sent as soon
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275 // as it is available. Otherwise, it is buffered and only sent to the
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276 // pager when it is time to print another prompt.
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277 bool m_page_output_immediately;
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278
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279 // TRUE means all output intended for the screen should be passed
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280 // through the pager.
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281 bool m_page_screen_output;
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282
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283 // TRUE means we write to the diary file.
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284 bool m_write_to_diary_file;
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285
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286 bool m_really_flush_to_pager;
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287
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288 bool m_flushing_output_to_pager;
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289
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290 void start_external_pager ();
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291
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292 void do_sync (const char *msg, int len, bool bypass_pager);
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293 };
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294
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295 extern OCTINTERP_API std::ostream& __stdout__ ();
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296
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297 extern OCTINTERP_API std::ostream& __diary__ ();
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298
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299 OCTAVE_END_NAMESPACE(octave)
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300
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301 #define octave_stdout (octave::__stdout__ ())
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302
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303 #define octave_diary (octave::__diary__ ())
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304
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305 #endif