annotate liboctave/util/cmd-hist.h @ 27919:1891570abac8

update Octave Project Developers copyright for the new year In files that have the "Octave Project Developers" copyright notice, update for 2020.
author John W. Eaton <jwe@octave.org>
date Mon, 06 Jan 2020 22:29:51 -0500
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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 distribution
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6 or <https://octave.org/COPYRIGHT.html/>.
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7
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8
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9 This file is part of Octave.
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10
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11 Octave is free software: you can redistribute it and/or modify it
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12 under the terms of the GNU General Public License as published by
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13 the Free Software Foundation, either version 3 of the License, or
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14 (at your option) any later version.
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15
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16 Octave is distributed in the hope that it will be useful, but
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17 WITHOUT ANY WARRANTY; without even the implied warranty of
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18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 GNU General Public License for more details.
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20
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21 You should have received a copy of the GNU General Public License
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22 along with Octave; see the file COPYING. If not, see
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23 <https://www.gnu.org/licenses/>.
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24
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25 */
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26
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27 #if ! defined (octave_cmd_hist_h)
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28 #define octave_cmd_hist_h 1
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29
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30 #include "octave-config.h"
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31
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32 #include <string>
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33
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34 #include "str-vec.h"
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35
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36 namespace octave
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37 {
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38 class
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39 OCTAVE_API
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40 command_history
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41 {
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42 protected:
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43
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44 command_history (void)
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45 : m_initialized (false), m_ignoring_additions (false),
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46 m_history_control (0), m_lines_in_file (0),
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47 m_lines_this_session (0), m_file (), m_size (-1)
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48 { }
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49
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50 public:
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51
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52 // No copying!
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53
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54 command_history (const command_history&) = delete;
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55
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56 command_history& operator = (const command_history&) = delete;
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57
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58 virtual ~command_history (void) = default;
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59
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60 static void initialize (bool, const std::string&, int, const std::string&);
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61
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62 static bool is_initialized (void);
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63
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64 static void set_file (const std::string&);
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65
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66 static std::string file (void);
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67
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68 static void process_histcontrol (const std::string&);
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69
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70 static std::string histcontrol (void);
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71
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72 static void set_size (int);
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74 static int size (void);
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75
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76 static void ignore_entries (bool = true);
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77
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78 static bool ignoring_entries (void);
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79
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80 static bool add (const std::string&);
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81
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82 static void remove (int);
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83
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84 static void clear (void);
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85
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86 static int where (void);
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87
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88 static int length (void);
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89
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90 static int max_input_history (void);
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91
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92 static int base (void);
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93
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94 static int current_number (void);
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95
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96 static void stifle (int);
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97
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98 static int unstifle (void);
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99
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100 static int is_stifled (void);
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101
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102 static void set_mark (int n);
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103
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104 // Gag. This declaration has to match the Function typedef in
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105 // readline.h.
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106
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107 static int goto_mark (void);
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108
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109 static void read (bool = true);
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111 static void read (const std::string&, bool = true);
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112
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113 static void read_range (int = -1, int = -1, bool = true);
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115 static void read_range (const std::string&, int = -1, int = -1,
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116 bool = true);
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118 static void write (const std::string& = "");
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119
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120 static void append (const std::string& = "");
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121
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122 static void truncate_file (const std::string& = "", int = -1);
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123
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124 static string_vector list (int = -1, bool = false);
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125
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126 static std::string get_entry (int);
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127
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128 static void replace_entry (int, const std::string&);
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129
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130 static void clean_up_and_save (const std::string& = "", int = -1);
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132 private:
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133
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134 static bool instance_ok (void);
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135
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136 static void make_command_history (void);
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137
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138 // The real thing.
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139 static command_history *s_instance;
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140
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141 static void cleanup_instance (void)
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142 {
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143 delete s_instance;
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144 s_instance = nullptr;
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145 }
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146
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147 protected:
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148
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149 // To use something other than the GNU history library, derive a new
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150 // class from command_history, overload these functions as
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151 // necessary, and make instance point to the new class.
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152
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153 virtual void do_set_file (const std::string&);
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154
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155 virtual std::string do_file (void);
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156
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157 virtual void do_process_histcontrol (const std::string&);
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158
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159 virtual std::string do_histcontrol (void) const { return ""; }
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160
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161 virtual void do_initialize (bool, const std::string&, int,
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162 const std::string&);
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163
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164 virtual bool do_is_initialized (void) const;
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165
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166 virtual void do_set_size (int);
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167
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168 virtual int do_size (void) const;
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169
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170 virtual void do_ignore_entries (bool);
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171
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172 virtual bool do_ignoring_entries (void) const;
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173
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174 virtual bool do_add (const std::string&);
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175
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176 virtual void do_remove (int);
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177
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178 virtual void do_clear (void);
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179
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180 virtual int do_where (void) const;
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181
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182 virtual int do_length (void) const;
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183
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184 virtual int do_max_input_history (void) const;
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185
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186 virtual int do_base (void) const;
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187
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188 virtual int do_current_number (void) const;
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189
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190 virtual void do_stifle (int);
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191
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192 virtual int do_unstifle (void);
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193
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194 virtual int do_is_stifled (void) const;
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195
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196 virtual void do_set_mark (int);
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197
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198 virtual int do_goto_mark (void);
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199
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200 virtual void do_read (const std::string&, bool);
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201
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202 virtual void do_read_range (const std::string&, int, int, bool);
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203
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204 virtual void do_write (const std::string&) const;
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205
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206 virtual void do_append (const std::string&);
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207
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208 virtual void do_truncate_file (const std::string&, int) const;
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209
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210 virtual string_vector do_list (int, bool) const;
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211
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212 virtual std::string do_get_entry (int) const;
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213
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214 virtual void do_replace_entry (int, const std::string&);
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215
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216 virtual void do_clean_up_and_save (const std::string&, int);
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217
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218 void error (int, const std::string& msg = "") const;
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219
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220 void error (const std::string&) const;
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221
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222 // TRUE means we have initialized the history filename and number of
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223 // lines to save.
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224 bool m_initialized;
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225
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226 // TRUE means we are ignoring new additions.
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227 bool m_ignoring_additions;
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228
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229 // Bitmask for history control options. See oct-rl-hist.h.
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230 int m_history_control;
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231
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232 // The number of history lines we read from the history file.
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233 int m_lines_in_file;
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234
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235 // The number of history lines we've saved so far.
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236 int m_lines_this_session;
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237
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238 // The default history file.
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239 std::string m_file;
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240
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241 // The number of lines of history to save.
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242 int m_size;
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243 };
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244 }
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245
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246 #endif