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annotate liboctave/util/cmd-edit.h @ 30564:796f54d4ddbf stable

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update Octave Project Developers copyright for the new year In files that have the "Octave Project Developers" copyright notice, update for 2021. In all .txi and .texi files except gpl.txi and gpl.texi in the doc/liboctave and doc/interpreter directories, change the copyright to "Octave Project Developers", the same as used for other source files. Update copyright notices for 2022 (not done since 2019). For gpl.txi and gpl.texi, change the copyright notice to be "Free Software Foundation, Inc." and leave the date at 2007 only because this file only contains the text of the GPL, not anything created by the Octave Project Developers. Add Paul Thomas to contributors.in.
author John W. Eaton <jwe@octave.org>
date Tue, 28 Dec 2021 18:22:40 -0500
parents f6fe2dcaffaf
children e88a07dec498
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1996-2022 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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56
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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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70
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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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78
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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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114
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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
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146 generate_filename_completions (const std::string& text);
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147
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148 static std::string get_line_buffer (void);
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149
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150 static std::string get_current_line (void);
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151
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152 static char get_prev_char (int);
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153
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154 static void replace_line (const std::string& text, bool clear_undo = true);
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155
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156 static void kill_full_line (void);
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157
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158 static void insert_text (const std::string& text);
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159
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160 static void newline (void);
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161
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162 static void accept_line (void);
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163
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164 static bool undo (void);
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165
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166 static void clear_undo_list (void);
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167
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168 static void add_startup_hook (startup_hook_fcn f);
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169
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170 static void remove_startup_hook (startup_hook_fcn f);
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171
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172 static void add_pre_input_hook (pre_input_hook_fcn f);
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173
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174 static void remove_pre_input_hook (pre_input_hook_fcn f);
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175
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176 static void add_event_hook (event_hook_fcn f);
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177
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178 static void remove_event_hook (event_hook_fcn f);
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179
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180 static void run_event_hooks (void);
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181
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182 static void read_init_file (const std::string& file = "");
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183
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184 static void re_read_init_file (void);
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185
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186 static bool filename_completion_desired (bool);
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187
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188 static bool filename_quoting_desired (bool);
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189
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190 static bool prefer_env_winsize (bool);
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191
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192 static bool interrupt (bool = true);
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193
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194 static void interrupt_event_loop (bool flag = true);
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195
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196 static bool event_loop_interrupted (void);
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197
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198 static int current_command_number (void);
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199
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200 static void reset_current_command_number (int n);
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201
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202 static void increment_current_command_number (void);
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203
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204 static void force_default_editor (void);
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205
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206 static void set_initial_input (const std::string& text);
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207
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208 static int insert_initial_input (void);
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209
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210 private:
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211
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212 static bool instance_ok (void);
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213
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214 static void make_command_editor (void);
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215
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216 static int startup_handler (void);
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217
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218 static int pre_input_handler (void);
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219
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220 static int event_handler (void);
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221
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222 static void cleanup_instance (void)
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223 {
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224 delete s_instance;
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225 s_instance = nullptr;
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226 }
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227
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228 static void handle_interrupt_signal (void);
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229
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230 //--------
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231
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232 static command_editor *s_instance; // the real thing.
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233
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234 static std::set<startup_hook_fcn> m_startup_hook_set;
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235 static std::set<pre_input_hook_fcn> m_pre_input_hook_set;
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236 static std::set<event_hook_fcn> m_event_hook_set;
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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
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314 { return nullptr; }
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315
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316 virtual quoting_fcn do_get_quoting_function (void) const
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317 { return nullptr; }
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318
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319 virtual dequoting_fcn do_get_dequoting_function (void) const
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320 { return nullptr; }
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321
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322 virtual char_is_quoted_fcn do_get_char_is_quoted_function (void) const
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323 { return nullptr; }
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324
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325 virtual user_accept_line_fcn do_get_user_accept_line_function (void) const
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326 { return nullptr; }
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327
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328 virtual string_vector
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329 do_generate_filename_completions (const std::string& text) = 0;
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330
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331 virtual std::string do_get_line_buffer (void) const = 0;
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332
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333 virtual std::string do_get_current_line (void) const = 0;
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334
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335 virtual char do_get_prev_char (int) const = 0;
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336
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337 virtual void
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338 do_replace_line (const std::string& text, bool clear_undo) = 0;
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cba347c642e2 [project @ 2003-11-13 04:38:05 by jwe]
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339
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340 virtual void do_kill_full_line (void) = 0;
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341
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342 virtual void do_insert_text (const std::string& text) = 0;
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343
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344 virtual void do_newline (void) = 0;
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345
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346 virtual void do_accept_line (void) = 0;
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347
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348 virtual bool do_undo (void) { return false; }
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349
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350 virtual void do_clear_undo_list (void) { }
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351
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352 virtual void set_startup_hook (startup_hook_fcn) { }
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353
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354 virtual void restore_startup_hook (void) { }
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355
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356 virtual void set_pre_input_hook (pre_input_hook_fcn) { }
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357
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358 virtual void restore_pre_input_hook (void) { }
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359
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360 virtual void set_event_hook (event_hook_fcn) { }
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361
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362 virtual void restore_event_hook (void) { }
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363
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364 virtual void do_read_init_file (const std::string&) { }
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365
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366 virtual void do_re_read_init_file (void) { }
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367
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368 virtual bool do_filename_completion_desired (bool) { return false; }
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369
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370 virtual bool do_filename_quoting_desired (bool) { return false; }
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371
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372 virtual bool do_prefer_env_winsize (bool) { return false; }
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373
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374 virtual void do_interrupt (bool) { }
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375
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diff changeset
376 virtual void do_handle_interrupt_signal (void) { }
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377
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diff changeset
378 void do_interrupt_event_loop (bool arg) { m_interrupt_event_loop = arg; }
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diff changeset
379
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diff changeset
380 bool do_event_loop_interrupted (void) const
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diff changeset
381 { return m_interrupt_event_loop; }
24520
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diff changeset
382
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diff changeset
383 int do_insert_initial_input (void);
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diff changeset
384
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diff changeset
385 int read_octal (const std::string& s);
19304
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diff changeset
386
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diff changeset
387 void error (int);
16382
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diff changeset
388
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389 void error (const std::string&);
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390
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391 // The current command number.
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392 int m_command_number;
2926
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393
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diff changeset
394 int m_rows;
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diff changeset
395 int m_cols;
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diff changeset
396
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diff changeset
397 bool m_interrupted;
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398
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diff changeset
399 bool m_interrupt_event_loop;
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diff changeset
400
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diff changeset
401 std::string m_initial_input;
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diff changeset
402 };
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diff changeset
403 }
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diff changeset
404
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diff changeset
405 #endif