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annotate libgui/src/octave-adapter/octave-link.h @ 15402:7f423c6111c6

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refactor GUI event handling to use new event_queue class * octave-link.h, octave-link.cc (event_queue): Delete. (gui_event_queue): New event_queue variable. Change all uses of event_queue to user gui_event_queue instead. (octave_link::handle_event): Delete. (octave_link::post_event, octave_link::do_post_event): Provide methods that work directly with member functions pointers and data. * octave-event.h, octave-event.cc, octave-event-observer.h: Delete. Delete all uses. * libgui/src/module.mk (noinst_HEADERS): Delete octave-event.h and octave-event-observer.h from the list. (src_libgui_src_la_SOURCES): Delete octave-event.cc from the list. * workspace-view.h, history-dockwidget.h, main-window.h: Don't include octave-link.h. * history-dockwidget.cc (history_dock_widget::handle_event): Delete. (history_dock_widget::handle_event): New function adapted from handle_event. (history_dock_widget::request_history_model_update): Update for new event callback mechanism. * history-dockwidget.h: Update decls. * file-editor-tab.cc (file_editor_tab::handle_event): Delete. (file_editor_tab::run_file_callback, file_editor_tab::add_breakpoint_callback, file_editor_tab::remove_breakpoint_callback, file_editor_tab::remove_all_breakpoints_callback): New functions adapted from handle_event and corresponding octave_event classes. (file_editor_tab::request_add_breakpoint, file_editor_tab::request_remove_breakpoint, file_editor_tab::remove_all_breakpoints, file_editor_tab::run_file): Update for new event callback mechanism. * file-editor-tab.h: Update decls. (file_editor_tab::bp_info): New nested struct. * main-window.cc (main_window::handle_event): Delete. (main_window::save_workspace_callback, main_window::load_workspace_callback, main_window::clear_workspace_callback, main_window::clear_history_callback, main_window::change_directory_callback, main_window::debug_continue_callback, main_window::debug_step_into_callback, main_window::debug_step_over_callback, main_window::debug_step_out_callback, main_window::debug_quit_callback, main_window::exit_callback): New functions. (main_window::handle_save_workspace_request, main_window::handle_load_workspace_request, main_window::handle_clear_workspace_request, main_window::handle_clear_history_request, main_window::change_current_working_directory, main_window::set_current_working_directory, main_window::debug_continue, main_window::debug_step_into, main_window::debug_step_over, main_window::debug_step_out, main_window::debug_quit): Update for new event callback mechanism. * main-window.h: Update decls. * workspace-model.cc (workspace_model::handle_event): Delete. (workspace_model::update_workspace_callback): New function. (workspace_model::request_update_workspace): Update for new event callback mechanism. * workspace-model.h: Update decls.
author John W. Eaton <jwe@octave.org>
date Mon, 17 Sep 2012 23:07:22 -0400
parents 24b5348d38e7
children d4b6ad43bc87
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15204
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1 /*
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2
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3 Copyright (C) 2011-2012 Jacob Dawid
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4 Copyright (C) 2011-2012 John P. Swensen
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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21
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22 */
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23
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24 #ifndef OCTAVELINK_H
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25 #define OCTAVELINK_H
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27 #include <string>
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29 class octave_mutex;
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31 #include "event-queue.h"
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32
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33 #include "octave-main-thread.h"
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34 #include "octave-event-listener.h"
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35
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36 // \class OctaveLink
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37 // \brief Provides threadsafe access to octave.
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38 // \author Jacob Dawid
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39 //
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40 // This class is a wrapper around octave and provides thread safety by
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41 // buffering access operations to octave and executing them in the
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42 // readline event hook, which lives in the octave thread.
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43
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44 class octave_link
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45 {
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46 protected:
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47
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48 octave_link (void);
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49
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50 public:
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51
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52 ~octave_link (void) { }
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53
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54 static void launch_octave (void)
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55 {
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56 if (instance_ok ())
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57 instance->do_launch_octave ();
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58 }
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59
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60 static void register_event_listener (octave_event_listener *el)
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61 {
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62 if (instance_ok ())
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63 instance->do_register_event_listener (el);
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64 }
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65
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66 static void generate_events (void)
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67 {
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68 if (instance_ok ())
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69 instance->do_generate_events ();
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70 }
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71
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72 static void process_events (void)
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73 {
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74 if (instance_ok ())
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75 instance->do_process_events ();
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76 }
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77
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78 template <class T>
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79 static void post_event (T *obj, void (T::*method) (void))
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80 {
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81 if (instance_ok ())
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82 instance->do_post_event (obj, method);
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83 }
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84
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85 template <class T, class A>
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86 static void post_event (T *obj, void (T::*method) (A), A arg)
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87 {
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88 if (instance_ok ())
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89 instance->do_post_event (obj, method, arg);
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90 }
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91
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92 template <class T, class A>
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93 static void post_event (T *obj, void (T::*method) (const A&), const A& arg)
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94 {
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95 if (instance_ok ())
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96 instance->do_post_event (obj, method, arg);
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97 }
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98
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99 static void about_to_exit (void)
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100 {
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101 if (instance_ok ())
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102 instance->do_about_to_exit ();
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103 }
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104
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105 static void entered_readline_hook (void)
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106 {
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107 if (instance_ok ())
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108 instance->do_entered_readline_hook ();
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109 }
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110
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111 static void finished_readline_hook (void)
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112 {
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113 if (instance_ok ())
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114 instance->do_finished_readline_hook ();
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115 }
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116
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117 static std::string last_working_directory (void)
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118 {
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119 return instance_ok ()
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120 ? instance->do_last_working_directory () : std::string ();
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121 }
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122
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123 private:
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124
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125 static octave_link *instance;
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126
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127 static void cleanup_instance (void) { delete instance; instance = 0; }
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128
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129 // No copying!
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130
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131 octave_link (const octave_link&);
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132
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133 octave_link& operator = (const octave_link&);
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134
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135 static bool instance_ok (void);
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136
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137 octave_event_listener *event_listener;
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138
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139 // Thread running octave_main.
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140 octave_main_thread *main_thread;
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141
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142 // Semaphore to lock access to the event queue.
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143 octave_mutex *event_queue_mutex;
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144
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145 // Event Queue.
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146 event_queue gui_event_queue;
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147
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148 // Stores the last known current working directory of octave.
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149 std::string last_cwd;
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150
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151 bool debugging;
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152
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153 void do_launch_octave (void);
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154 void do_register_event_listener (octave_event_listener *oel);
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155
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156 void do_generate_events (void);
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157 void do_process_events (void);
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158
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159 template <class T>
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160 void do_post_event (T *obj, void (T::*method) (void))
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161 {
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162 gui_event_queue.add_method (obj, method);
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163 }
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164
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165 template <class T, class A>
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166 void do_post_event (T *obj, void (T::*method) (A), A arg)
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167 {
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168 gui_event_queue.add_method (obj, method, arg);
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169 }
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170
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171 template <class T, class A>
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172 void do_post_event (T *obj, void (T::*method) (const A&), const A& arg)
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173 {
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174 gui_event_queue.add_method (obj, method, arg);
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175 }
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176
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177 void do_about_to_exit (void);
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178
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179 void do_entered_readline_hook (void) { }
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180 void do_finished_readline_hook (void) { }
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181
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182 std::string do_last_working_directory (void);
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183 };
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184
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185 #endif // OCTAVELINK_H