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annotate liboctave/util/cmd-edit.h @ 27923:bd51beb6205e

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update formatting of copyright notices * Use <https://octave.org/copyright/> instead of <https://octave.org/COPYRIGHT.html/>. * For consistency with other comments in the Octave sources, use C++-style comments for copyright blocks in C and C++ files. * Use delimiters above and below copyright blocks that are appropriate for the language used in the file. * Eliminate extra spacing inside copyright blocks. * lex.ll (looks_like_copyright): Also allow newlines and carriage returns before the word "Copyright". * scripts/mk-doc.pl (gethelp): Also skip empty comment lines. * bp-table.cc, type.m: Adjust tests.
author John W. Eaton <jwe@octave.org>
date Wed, 08 Jan 2020 11:59:41 -0500
parents 1891570abac8
children 863ae57eee69
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1996-2020 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 ////////////////////////////////////////////////////////////////////////
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25
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26 #if ! defined (octave_cmd_edit_h)
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27 #define octave_cmd_edit_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 <cstdio>
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32
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33 #include <set>
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34 #include <string>
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35
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36 #include "str-vec.h"
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37
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38 namespace octave
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39 {
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40 class
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41 OCTAVE_API
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42 command_editor
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43 {
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44 protected:
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45
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46 command_editor (void)
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47 : m_command_number (1), m_rows (24), m_cols (80), m_interrupted (false),
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48 m_interrupt_event_loop (false), m_initial_input ()
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49 { }
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51 public:
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53 typedef int (*startup_hook_fcn) (void);
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54
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55 typedef int (*pre_input_hook_fcn) (void);
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57 typedef int (*event_hook_fcn) (void);
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58
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59 typedef std::string (*completion_fcn) (const std::string&, int);
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60
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61 typedef char * (*completion_hook_fcn) ();
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62
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63 typedef std::string (*quoting_fcn) (const std::string&, int, char);
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64
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65 typedef std::string (*dequoting_fcn) (const std::string&, int);
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66
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67 typedef int (*char_is_quoted_fcn) (const std::string&, int);
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68
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69 typedef void (*user_accept_line_fcn) (const std::string&);
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71 // No copying!
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72
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73 command_editor (const command_editor&) = delete;
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74
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75 command_editor& operator = (const command_editor&) = delete;
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76
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77 virtual ~command_editor (void) = default;
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79 static void set_name (const std::string& n);
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80
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81 static std::string readline (const std::string& prompt);
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82
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83 static std::string readline (const std::string& prompt, bool& eof);
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84
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85 static void set_input_stream (FILE *f);
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86
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87 static FILE * get_input_stream (void);
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88
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89 static void set_output_stream (FILE *f);
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90
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91 static FILE * get_output_stream (void);
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92
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93 static void redisplay (void);
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94
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95 static int terminal_rows (void);
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96
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97 static int terminal_cols (void);
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98
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99 static void clear_screen (bool skip_redisplay = false);
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100
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101 static void resize_terminal (void);
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102
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103 static void set_screen_size (int ht, int wd);
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104
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105 static std::string decode_prompt_string (const std::string& s);
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106
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107 static void restore_terminal_state (void);
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108
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109 static void blink_matching_paren (bool flag);
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110
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111 static bool erase_empty_line (bool flag);
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112
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113 static void set_basic_word_break_characters (const std::string& s);
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115 static void set_completer_word_break_characters (const std::string& s);
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116
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117 static void set_basic_quote_characters (const std::string& s);
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118
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119 static void set_filename_quote_characters (const std::string& s);
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120
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121 static void set_completer_quote_characters (const std::string& s);
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122
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123 static void set_completion_append_character (char c);
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124
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125 static void set_completion_function (completion_fcn f);
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126
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127 static void set_quoting_function (quoting_fcn f);
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128
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129 static void set_dequoting_function (dequoting_fcn f);
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130
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131 static void set_char_is_quoted_function (char_is_quoted_fcn f);
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132
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133 static void set_user_accept_line_function (user_accept_line_fcn f);
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134
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135 static completion_fcn get_completion_function (void);
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136
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137 static quoting_fcn get_quoting_function (void);
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138
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139 static dequoting_fcn get_dequoting_function (void);
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140
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141 static char_is_quoted_fcn get_char_is_quoted_function (void);
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142
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143 static user_accept_line_fcn get_user_accept_line_function (void);
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144
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145 static string_vector generate_filename_completions (const std::string& text);
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146
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147 static std::string get_line_buffer (void);
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148
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149 static std::string get_current_line (void);
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150
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151 static char get_prev_char (int);
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152
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153 static void replace_line (const std::string& text, bool clear_undo = true);
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154
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155 static void kill_full_line (void);
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156
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157 static void insert_text (const std::string& text);
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158
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159 static void newline (void);
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160
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161 static void accept_line (void);
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162
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163 static bool undo (void);
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164
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165 static void clear_undo_list (void);
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166
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167 static void add_startup_hook (startup_hook_fcn f);
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168
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169 static void remove_startup_hook (startup_hook_fcn f);
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170
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171 static void add_pre_input_hook (pre_input_hook_fcn f);
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172
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173 static void remove_pre_input_hook (pre_input_hook_fcn f);
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174
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175 static void add_event_hook (event_hook_fcn f);
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176
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177 static void remove_event_hook (event_hook_fcn f);
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178
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179 static void run_event_hooks (void);
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180
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181 static void read_init_file (const std::string& file = "");
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182
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183 static void re_read_init_file (void);
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184
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185 static bool filename_completion_desired (bool);
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186
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187 static bool filename_quoting_desired (bool);
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188
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189 static bool prefer_env_winsize (bool);
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190
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191 static bool interrupt (bool = true);
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192
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193 static void interrupt_event_loop (bool flag = true);
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194
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195 static bool event_loop_interrupted (void);
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196
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197 static int current_command_number (void);
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198
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199 static void reset_current_command_number (int n);
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200
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201 static void increment_current_command_number (void);
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202
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203 static void force_default_editor (void);
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204
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205 static void set_initial_input (const std::string& text);
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206
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207 static int insert_initial_input (void);
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208
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209 private:
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210
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211 static bool instance_ok (void);
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212
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213 static void make_command_editor (void);
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214
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215 static int startup_handler (void);
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216
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217 static int pre_input_handler (void);
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218
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219 static int event_handler (void);
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220
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221 static std::set<startup_hook_fcn> startup_hook_set;
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222
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223 static std::set<pre_input_hook_fcn> pre_input_hook_set;
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224
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225 static std::set<event_hook_fcn> event_hook_set;
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226
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227 // The real thing.
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228 static command_editor *s_instance;
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229
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230 static void cleanup_instance (void)
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231 {
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232 delete s_instance;
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233 s_instance = nullptr;
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234 }
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235
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236 static void handle_interrupt_signal (void);
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237
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238 protected:
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239
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240 // To use something other than the GNU readline library, derive a new
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241 // class from command_editor, overload these functions as
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242 // necessary, and make instance point to the new class.
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243
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244 virtual void do_set_name (const std::string&) { }
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245
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246 std::string do_readline (const std::string& prompt)
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247 {
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248 bool eof;
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249
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250 return do_readline (prompt, eof);
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251 }
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252
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253 virtual std::string do_readline (const std::string&, bool&) = 0;
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254
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255 virtual void do_set_input_stream (FILE *) = 0;
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256
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257 virtual FILE * do_get_input_stream (void) = 0;
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258
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259 virtual void do_set_output_stream (FILE *) = 0;
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260
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261 virtual FILE * do_get_output_stream (void) = 0;
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262
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263 virtual void do_redisplay (void) { }
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264
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265 virtual int do_terminal_rows (void) { return m_rows; }
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266
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267 virtual int do_terminal_cols (void) { return m_cols; }
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268
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269 virtual void do_clear_screen (bool) { }
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270
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271 virtual void do_resize_terminal (void) { }
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272
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273 virtual void do_set_screen_size (int ht, int wd)
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274 {
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275 m_rows = ht;
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276 m_cols = wd;
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277 }
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278
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279 virtual std::string do_decode_prompt_string (const std::string&);
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280
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281 virtual std::string newline_chars (void) { return "\n"; }
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282
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283 virtual void do_restore_terminal_state (void) { }
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284
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285 virtual void do_blink_matching_paren (bool) { }
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286
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287 virtual bool do_erase_empty_line (bool) { return false; }
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288
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289 virtual void do_set_basic_word_break_characters (const std::string&) { }
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290
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291 virtual void do_set_completer_word_break_characters (const std::string&) { }
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292
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293 virtual void do_set_completer_word_break_hook (completion_hook_fcn) { }
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294
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295 virtual void do_set_basic_quote_characters (const std::string&) { }
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296
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297 virtual void do_set_filename_quote_characters (const std::string&) { }
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298
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299 virtual void do_set_completer_quote_characters (const std::string&) { }
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300
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301 virtual void do_set_completion_append_character (char) { }
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302
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303 virtual void do_set_completion_function (completion_fcn) { }
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304
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305 virtual void do_set_quoting_function (quoting_fcn) { }
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306
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307 virtual void do_set_dequoting_function (dequoting_fcn) { }
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308
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309 virtual void do_set_char_is_quoted_function (char_is_quoted_fcn) { }
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310
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311 virtual void do_set_user_accept_line_function (user_accept_line_fcn) { }
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312
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313 virtual completion_fcn do_get_completion_function (void) const { return nullptr; }
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314
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315 virtual quoting_fcn do_get_quoting_function (void) const { return nullptr; }
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316
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317 virtual dequoting_fcn do_get_dequoting_function (void) const { return nullptr; }
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318
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319 virtual char_is_quoted_fcn do_get_char_is_quoted_function (void) const
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320 { return nullptr; }
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321
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322 virtual user_accept_line_fcn do_get_user_accept_line_function (void) const
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323 { return nullptr; }
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324
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325 virtual string_vector
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326 do_generate_filename_completions (const std::string& text) = 0;
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327
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328 virtual std::string do_get_line_buffer (void) const = 0;
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329
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330 virtual std::string do_get_current_line (void) const = 0;
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331
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332 virtual char do_get_prev_char (int) const = 0;
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333
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334 virtual void do_replace_line (const std::string& text, bool clear_undo) = 0;
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335
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336 virtual void do_kill_full_line (void) = 0;
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337
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338 virtual void do_insert_text (const std::string& text) = 0;
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339
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340 virtual void do_newline (void) = 0;
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341
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342 virtual void do_accept_line (void) = 0;
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343
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344 virtual bool do_undo (void) { return false; }
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345
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346 virtual void do_clear_undo_list (void) { }
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347
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348 virtual void set_startup_hook (startup_hook_fcn) { }
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349
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350 virtual void restore_startup_hook (void) { }
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351
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352 virtual void set_pre_input_hook (pre_input_hook_fcn) { }
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353
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354 virtual void restore_pre_input_hook (void) { }
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355
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356 virtual void set_event_hook (event_hook_fcn) { }
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357
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358 virtual void restore_event_hook (void) { }
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359
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360 virtual void do_read_init_file (const std::string&) { }
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361
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362 virtual void do_re_read_init_file (void) { }
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363
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364 virtual bool do_filename_completion_desired (bool) { return false; }
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365
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366 virtual bool do_filename_quoting_desired (bool) { return false; }
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367
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368 virtual bool do_prefer_env_winsize (bool) { return false; }
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369
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370 virtual void do_interrupt (bool) { }
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371
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372 virtual void do_handle_interrupt_signal (void) { }
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373
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374 void do_interrupt_event_loop (bool arg) { m_interrupt_event_loop = arg; }
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375
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376 bool do_event_loop_interrupted (void) const
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377 {
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378 return m_interrupt_event_loop;
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379 }
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380
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381 int do_insert_initial_input (void);
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382
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diff changeset
383 int read_octal (const std::string& s);
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diff changeset
384
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diff changeset
385 void error (int);
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386
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387 void error (const std::string&);
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388
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389 // The current command number.
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390 int m_command_number;
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391
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392 int m_rows;
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393 int m_cols;
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394
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395 bool m_interrupted;
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396
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397 bool m_interrupt_event_loop;
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398
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399 std::string m_initial_input;
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400 };
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401 }
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402
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403 #endif