Mercurial > octave
annotate libinterp/corefcn/input.cc @ 18037:708173343c50 stable
use "octave" instead of "\\s" in default prompt
* input.cc (set_default_prompts): Use "octave" instead of "\\s".
(FPS1): Fix doc string to match.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 02 Dec 2013 12:05:14 -0500 |
parents | 175b392e91fe |
children | bffa6c8255a9 a87bdd302b1b 7bccc182e2f7 |
rev | line source |
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1 | 1 /* |
2 | |
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3 Copyright (C) 1993-2013 John W. Eaton |
1 | 4 |
5 This file is part of Octave. | |
6 | |
7 Octave is free software; you can redistribute it and/or modify it | |
8 under the terms of the GNU General Public License as published by the | |
7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
10 option) any later version. | |
1 | 11 |
12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
7016 | 18 along with Octave; see the file COPYING. If not, see |
19 <http://www.gnu.org/licenses/>. | |
1 | 20 |
21 */ | |
22 | |
2939 | 23 // Get command input interactively or from files. |
1 | 24 |
240 | 25 #ifdef HAVE_CONFIG_H |
1192 | 26 #include <config.h> |
1 | 27 #endif |
28 | |
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29 #include <cstdio> |
1343 | 30 #include <cstdlib> |
31 #include <cstring> | |
32 #include <cassert> | |
33 | |
3503 | 34 #include <iostream> |
5765 | 35 #include <sstream> |
1728 | 36 #include <string> |
37 | |
529 | 38 #include <sys/types.h> |
39 #include <unistd.h> | |
1343 | 40 |
2927 | 41 #include "cmd-edit.h" |
3189 | 42 #include "file-ops.h" |
4153 | 43 #include "quit.h" |
1755 | 44 #include "str-vec.h" |
45 | |
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46 #include "debug.h" |
1352 | 47 #include "defun.h" |
48 #include "dirfns.h" | |
1 | 49 #include "error.h" |
2181 | 50 #include "gripes.h" |
3016 | 51 #include "help.h" |
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52 #include "hook-fcn.h" |
1 | 53 #include "input.h" |
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54 #include "lex.h" |
5832 | 55 #include "load-path.h" |
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56 #include "octave-link.h" |
1352 | 57 #include "oct-map.h" |
1742 | 58 #include "oct-hist.h" |
1670 | 59 #include "toplev.h" |
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60 #include "octave-link.h" |
1755 | 61 #include "oct-obj.h" |
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62 #include "ov-fcn-handle.h" |
1 | 63 #include "pager.h" |
529 | 64 #include "parse.h" |
1352 | 65 #include "pathlen.h" |
3772 | 66 #include "pt.h" |
1755 | 67 #include "pt-const.h" |
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68 #include "pt-eval.h" |
3805 | 69 #include "pt-stmt.h" |
1352 | 70 #include "sighandlers.h" |
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71 #include "symtab.h" |
1114 | 72 #include "sysdep.h" |
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73 #include "toplev.h" |
3098 | 74 #include "unwind-prot.h" |
1352 | 75 #include "utils.h" |
76 #include "variables.h" | |
529 | 77 |
2181 | 78 // Primary prompt string. |
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79 static std::string VPS1; |
2181 | 80 |
81 // Secondary prompt string. | |
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82 static std::string VPS2; |
2181 | 83 |
84 // String printed before echoed input (enabled by --echo-input). | |
5794 | 85 std::string VPS4 = "+ "; |
2181 | 86 |
3019 | 87 // Echo commands as they are executed? |
88 // | |
89 // 1 ==> echo commands read from script files | |
90 // 2 ==> echo commands from functions | |
91 // 4 ==> echo commands read from command line | |
92 // | |
93 // more than one state can be active at once. | |
5794 | 94 int Vecho_executing_commands = ECHO_OFF; |
3019 | 95 |
3165 | 96 // The time we last printed a prompt. |
5832 | 97 octave_time Vlast_prompt_time = 0.0; |
3165 | 98 |
2181 | 99 // Character to append after successful command-line completion attempts. |
5794 | 100 static char Vcompletion_append_char = ' '; |
2181 | 101 |
3019 | 102 // TRUE means this is an interactive shell. |
103 bool interactive = false; | |
1 | 104 |
3019 | 105 // TRUE means the user forced this shell to be interactive (-i). |
106 bool forced_interactive = false; | |
1 | 107 |
3804 | 108 // TRUE after a call to completion_matches. |
2299 | 109 bool octave_completion_matches_called = false; |
110 | |
6257 | 111 // TRUE if the plotting system has requested a call to drawnow at |
112 // the next user prompt. | |
7409 | 113 bool Vdrawnow_requested = false; |
6257 | 114 |
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115 // TRUE if we are in debugging mode. |
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116 bool Vdebugging = false; |
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117 |
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118 // If we are in debugging mode, this is the last command entered, so |
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119 // that we can repeat the previous command if the user just types RET. |
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120 static std::string last_debugging_command = "\n"; |
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121 |
7294 | 122 // TRUE if we are running in the Emacs GUD mode. |
123 static bool Vgud_mode = false; | |
124 | |
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125 // The filemarker used to separate filenames from subfunction names |
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126 char Vfilemarker = '>'; |
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127 |
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128 static hook_function_list input_event_hook_functions; |
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129 |
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130 // For octave_quit. |
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131 void |
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132 remove_input_event_hook_functions (void) |
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133 { |
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134 input_event_hook_functions.clear (); |
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135 } |
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136 |
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137 void |
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138 set_default_prompts (void) |
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139 { |
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140 // Use literal "octave" instead of "\\s" to avoid setting the prompt |
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141 // to "octave.exe" or "octave-gui", etc. |
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142 |
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143 VPS1 = "octave:\\#> "; |
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144 VPS2 = "> "; |
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145 VPS4 = "+ "; |
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146 |
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147 octave_link::set_default_prompts (VPS1, VPS2, VPS4); |
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148 } |
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149 |
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150 void |
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151 octave_base_reader::do_input_echo (const std::string& input_string) const |
1044 | 152 { |
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153 int do_echo = reading_script_file () |
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154 ? (Vecho_executing_commands & ECHO_SCRIPTS) |
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155 : (Vecho_executing_commands & ECHO_CMD_LINE) && ! forced_interactive; |
1588 | 156 |
157 if (do_echo) | |
1044 | 158 { |
1403 | 159 if (forced_interactive) |
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160 { |
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161 if (pflag > 0) |
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162 octave_stdout << command_editor::decode_prompt_string (VPS1); |
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163 else |
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164 octave_stdout << command_editor::decode_prompt_string (VPS2); |
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165 } |
1403 | 166 else |
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167 octave_stdout << command_editor::decode_prompt_string (VPS4); |
1044 | 168 |
1755 | 169 if (! input_string.empty ()) |
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170 { |
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171 octave_stdout << input_string; |
1755 | 172 |
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173 if (input_string[input_string.length () - 1] != '\n') |
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174 octave_stdout << "\n"; |
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175 } |
1044 | 176 } |
177 } | |
178 | |
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179 static std::string |
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180 gnu_readline (const std::string& s, bool& eof) |
1822 | 181 { |
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182 octave_quit (); |
5142 | 183 |
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184 eof = false; |
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185 |
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186 std::string retval = command_editor::readline (s, eof); |
2927 | 187 |
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188 if (! eof && retval.empty ()) |
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189 retval = "\n"; |
1822 | 190 |
191 return retval; | |
192 } | |
581 | 193 |
6257 | 194 static inline std::string |
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195 interactive_input (const std::string& s, bool& eof) |
6257 | 196 { |
197 Vlast_prompt_time.stamp (); | |
198 | |
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199 if (Vdrawnow_requested && (interactive || forced_interactive)) |
6257 | 200 { |
201 feval ("drawnow"); | |
202 | |
6367 | 203 flush_octave_stdout (); |
204 | |
6305 | 205 // We set Vdrawnow_requested to false even if there is an error |
206 // in drawnow so that the error doesn't reappear at every prompt. | |
207 | |
6257 | 208 Vdrawnow_requested = false; |
6305 | 209 |
210 if (error_state) | |
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211 return "\n"; |
6257 | 212 } |
213 | |
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214 return gnu_readline (s, eof); |
6257 | 215 } |
216 | |
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217 std::string |
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218 octave_base_reader::octave_gets (bool& eof) |
1 | 219 { |
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220 octave_quit (); |
5142 | 221 |
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222 eof = false; |
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223 |
3523 | 224 std::string retval; |
1 | 225 |
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226 // Process pre input event hook function prior to flushing output and |
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227 // printing the prompt. |
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228 |
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229 if (interactive || forced_interactive) |
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230 { |
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231 if (! Vdebugging) |
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232 octave_link::exit_debugger_event (); |
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233 |
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234 octave_link::pre_input_event (); |
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235 |
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236 octave_link::set_workspace (); |
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237 } |
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238 |
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239 bool history_skip_auto_repeated_debugging_command = false; |
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240 |
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241 std::string ps = (pflag > 0) ? VPS1 : VPS2; |
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242 |
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243 std::string prompt = command_editor::decode_prompt_string (ps); |
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244 |
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245 pipe_handler_error_count = 0; |
1755 | 246 |
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247 flush_octave_stdout (); |
2618 | 248 |
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249 octave_pager_stream::reset (); |
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250 octave_diary_stream::reset (); |
1 | 251 |
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252 octave_diary << prompt; |
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253 |
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254 retval = interactive_input (prompt, eof); |
581 | 255 |
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256 // There is no need to update the load_path cache if there is no |
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257 // user input. |
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258 if (retval != "\n" |
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259 && retval.find_first_not_of (" \t\n\r") != std::string::npos) |
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260 { |
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261 load_path::update (); |
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262 |
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263 if (Vdebugging) |
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264 last_debugging_command = retval; |
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265 else |
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266 last_debugging_command = "\n"; |
1 | 267 } |
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268 else if (Vdebugging) |
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269 { |
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270 retval = last_debugging_command; |
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271 history_skip_auto_repeated_debugging_command = true; |
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272 } |
1 | 273 |
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274 if (retval != "\n") |
1 | 275 { |
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276 if (! history_skip_auto_repeated_debugging_command) |
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277 { |
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278 if (command_history::add (retval)) |
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279 octave_link::append_history (retval); |
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280 } |
1 | 281 |
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282 octave_diary << retval; |
3176 | 283 |
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284 if (retval[retval.length () - 1] != '\n') |
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285 octave_diary << "\n"; |
581 | 286 |
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287 do_input_echo (retval); |
1 | 288 } |
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289 else |
3176 | 290 octave_diary << "\n"; |
9476 | 291 |
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292 // Process post input event hook function after the internal history |
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293 // list has been updated. |
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294 |
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295 if (interactive || forced_interactive) |
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296 octave_link::post_input_event (); |
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297 |
1822 | 298 return retval; |
1 | 299 } |
300 | |
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301 bool |
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302 octave_base_reader::reading_fcn_file (void) const |
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303 { |
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304 return lexer ? lexer->reading_fcn_file : false; |
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305 } |
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306 |
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307 bool |
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308 octave_base_reader::reading_classdef_file (void) const |
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309 { |
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310 return lexer ? lexer->reading_classdef_file : false; |
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311 } |
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312 |
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313 bool |
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314 octave_base_reader::reading_script_file (void) const |
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315 { |
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316 return lexer ? lexer->reading_script_file : false; |
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317 } |
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318 |
581 | 319 // Fix things up so that input can come from the standard input. This |
320 // may need to become much more complicated, which is why it's in a | |
321 // separate function. | |
322 | |
1 | 323 FILE * |
324 get_input_from_stdin (void) | |
325 { | |
2927 | 326 command_editor::set_input_stream (stdin); |
327 return command_editor::get_input_stream (); | |
1 | 328 } |
329 | |
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330 // FIXME: make this generate file names when appropriate. |
2921 | 331 |
2247 | 332 static string_vector |
3523 | 333 generate_possible_completions (const std::string& text, std::string& prefix, |
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334 std::string& hint) |
1280 | 335 { |
2247 | 336 string_vector names; |
1280 | 337 |
2921 | 338 prefix = ""; |
1280 | 339 |
4604 | 340 if (looks_like_struct (text)) |
1430 | 341 names = generate_struct_completions (text, prefix, hint); |
342 else | |
2247 | 343 names = make_name_list (); |
1280 | 344 |
2944 | 345 // Sort and remove duplicates. |
2348 | 346 |
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347 names.sort (true); |
2348 | 348 |
1280 | 349 return names; |
350 } | |
351 | |
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352 static bool |
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353 is_completing_dirfns (void) |
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354 { |
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355 static std::string dirfns_commands[] = {"cd", "ls"}; |
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356 static const size_t dirfns_commands_length = 2; |
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357 |
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358 bool retval = false; |
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359 |
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360 std::string line = command_editor::get_line_buffer (); |
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361 |
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362 for (size_t i = 0; i < dirfns_commands_length; i++) |
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363 { |
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364 int index = line.find (dirfns_commands[i] + " "); |
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365 |
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366 if (index == 0) |
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367 { |
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368 retval = true; |
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369 break; |
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370 } |
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371 } |
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372 |
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373 return retval; |
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374 } |
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375 |
3536 | 376 static std::string |
3523 | 377 generate_completion (const std::string& text, int state) |
1280 | 378 { |
3523 | 379 std::string retval; |
2944 | 380 |
3523 | 381 static std::string prefix; |
382 static std::string hint; | |
1280 | 383 |
2921 | 384 static size_t hint_len = 0; |
1280 | 385 |
1 | 386 static int list_index = 0; |
2921 | 387 static int name_list_len = 0; |
4604 | 388 static int name_list_total_len = 0; |
2247 | 389 static string_vector name_list; |
4604 | 390 static string_vector file_name_list; |
1 | 391 |
1280 | 392 static int matches = 0; |
1 | 393 |
394 if (state == 0) | |
395 { | |
396 list_index = 0; | |
397 | |
2921 | 398 prefix = ""; |
1280 | 399 |
2921 | 400 hint = text; |
1280 | 401 |
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402 // No reason to display symbols while completing a |
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403 // file/directory operation. |
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404 |
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405 if (is_completing_dirfns ()) |
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406 name_list = string_vector (); |
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407 else |
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408 name_list = generate_possible_completions (text, prefix, hint); |
1280 | 409 |
2921 | 410 name_list_len = name_list.length (); |
411 | |
4604 | 412 file_name_list = command_editor::generate_filename_completions (text); |
413 | |
414 name_list.append (file_name_list); | |
415 | |
416 name_list_total_len = name_list.length (); | |
417 | |
2921 | 418 hint_len = hint.length (); |
1280 | 419 |
420 matches = 0; | |
2247 | 421 |
2921 | 422 for (int i = 0; i < name_list_len; i++) |
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423 if (hint == name_list[i].substr (0, hint_len)) |
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424 matches++; |
1 | 425 } |
426 | |
4604 | 427 if (name_list_total_len > 0 && matches > 0) |
1 | 428 { |
4604 | 429 while (list_index < name_list_total_len) |
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430 { |
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431 std::string name = name_list[list_index]; |
2247 | 432 |
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433 list_index++; |
2247 | 434 |
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435 if (hint == name.substr (0, hint_len)) |
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436 { |
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437 if (list_index <= name_list_len && ! prefix.empty ()) |
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438 retval = prefix + "." + name; |
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439 else |
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440 retval = name; |
1280 | 441 |
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442 // FIXME: looks_like_struct is broken for now, |
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443 // so it always returns false. |
4179 | 444 |
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445 if (matches == 1 && looks_like_struct (retval)) |
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446 { |
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447 // Don't append anything, since we don't know |
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448 // whether it should be '(' or '.'. |
4179 | 449 |
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450 command_editor::set_completion_append_character ('\0'); |
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451 } |
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452 else |
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453 command_editor::set_completion_append_character |
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454 (Vcompletion_append_char); |
1280 | 455 |
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456 break; |
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457 } |
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458 } |
1 | 459 } |
460 | |
2944 | 461 return retval; |
1 | 462 } |
463 | |
6979 | 464 static std::string |
465 quoting_filename (const std::string &text, int, char quote) | |
466 { | |
467 if (quote) | |
468 return text; | |
469 else | |
470 return (std::string ("'") + text); | |
471 } | |
472 | |
2927 | 473 void |
474 initialize_command_input (void) | |
475 { | |
476 // If we are using readline, this allows conditional parsing of the | |
477 // .inputrc file. | |
269 | 478 |
2927 | 479 command_editor::set_name ("Octave"); |
1358 | 480 |
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481 // FIXME: this needs to include a comma too, but that |
3933 | 482 // causes trouble for the new struct element completion code. |
483 | |
4272 | 484 static const char *s = "\t\n !\"\'*+-/:;<=>(){}[\\]^`~"; |
3933 | 485 |
486 command_editor::set_basic_word_break_characters (s); | |
487 | |
488 command_editor::set_completer_word_break_characters (s); | |
489 | |
3004 | 490 command_editor::set_basic_quote_characters ("\""); |
2944 | 491 |
6979 | 492 command_editor::set_filename_quote_characters (" \t\n\\\"'@<>=;|&()#$`?*[!:{"); |
493 command_editor::set_completer_quote_characters ("'\""); | |
494 | |
2944 | 495 command_editor::set_completion_function (generate_completion); |
6979 | 496 |
497 command_editor::set_quoting_function (quoting_filename); | |
269 | 498 } |
499 | |
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500 static void |
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501 execute_in_debugger_handler (const std::pair<std::string, int>& arg) |
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502 { |
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503 octave_link::execute_in_debugger_event (arg.first, arg.second); |
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504 } |
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505 |
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506 static void |
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507 get_debug_input (const std::string& prompt) |
269 | 508 { |
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509 unwind_protect frame; |
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510 |
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511 octave_user_code *caller = octave_call_stack::caller_user_code (); |
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512 std::string nm; |
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513 |
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514 int curr_debug_line = octave_call_stack::current_line (); |
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515 |
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516 bool have_file = false; |
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517 |
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518 if (caller) |
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519 { |
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520 nm = caller->fcn_file_name (); |
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521 |
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522 if (nm.empty ()) |
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523 nm = caller->name (); |
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524 else |
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525 have_file = true; |
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526 } |
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527 else |
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528 curr_debug_line = -1; |
3180 | 529 |
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530 std::ostringstream buf; |
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531 |
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532 if (! nm.empty ()) |
3180 | 533 { |
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534 if (Vgud_mode) |
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535 { |
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536 static char ctrl_z = 'Z' & 0x1f; |
269 | 537 |
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538 buf << ctrl_z << ctrl_z << nm << ":" << curr_debug_line; |
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539 } |
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540 else |
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541 { |
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542 // FIXME: we should come up with a clean way to detect |
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543 // that we are stopped on the no-op command that marks the |
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544 // end of a function or script. |
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545 |
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546 buf << "stopped in " << nm; |
1 | 547 |
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548 if (curr_debug_line > 0) |
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549 buf << " at line " << curr_debug_line; |
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550 |
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551 if (have_file) |
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552 { |
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553 octave_link::enter_debugger_event (nm, curr_debug_line); |
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554 |
16524
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555 octave_link::set_workspace (); |
16468
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556 |
16438
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557 frame.add_fcn (execute_in_debugger_handler, |
16419
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558 std::pair<std::string, int> (nm, curr_debug_line)); |
16374
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|
559 |
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560 std::string line_buf |
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561 = get_file_line (nm, curr_debug_line); |
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562 |
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563 if (! line_buf.empty ()) |
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564 buf << "\n" << curr_debug_line << ": " << line_buf; |
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565 } |
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566 } |
3180 | 567 } |
568 | |
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569 std::string msg = buf.str (); |
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570 |
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571 if (! msg.empty ()) |
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572 std::cerr << msg << std::endl; |
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573 |
10066
2cd940306a06
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9999
diff
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574 frame.protect_var (VPS1); |
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575 VPS1 = prompt; |
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576 |
17731
f79bf671a493
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17323
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577 if (! (interactive || forced_interactive)) |
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578 { |
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579 frame.protect_var (forced_interactive); |
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580 forced_interactive = true; |
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581 } |
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582 |
16187
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|
583 octave_parser curr_parser; |
16151 | 584 |
12907
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585 while (Vdebugging) |
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586 { |
16127
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16122
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587 unwind_protect middle_frame; |
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588 |
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589 reset_error_handler (); |
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590 |
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591 curr_parser.reset (); |
9999
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592 |
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593 int retval = curr_parser.run (); |
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594 |
16382
389b09a914e2
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595 if (command_editor::interrupt (false)) |
389b09a914e2
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|
596 break; |
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597 else |
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598 { |
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599 if (retval == 0 && curr_parser.stmt_list) |
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600 { |
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601 curr_parser.stmt_list->accept (*current_evaluator); |
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602 |
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603 if (octave_completion_matches_called) |
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604 octave_completion_matches_called = false; |
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605 } |
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606 |
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607 octave_quit (); |
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608 } |
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609 } |
529 | 610 } |
611 | |
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612 const std::string octave_base_reader::in_src ("invalid"); |
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613 |
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614 const std::string octave_terminal_reader::in_src ("terminal"); |
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615 |
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616 std::string |
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617 octave_terminal_reader::get_input (bool& eof) |
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618 { |
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619 octave_quit (); |
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620 |
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621 eof = false; |
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622 |
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623 return octave_gets (eof); |
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624 } |
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625 |
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626 const std::string octave_file_reader::in_src ("file"); |
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627 |
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628 std::string |
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629 octave_file_reader::get_input (bool& eof) |
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630 { |
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631 octave_quit (); |
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632 |
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633 eof = false; |
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634 |
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635 return octave_fgets (file, eof); |
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636 } |
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637 |
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638 const std::string octave_eval_string_reader::in_src ("eval_string"); |
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639 |
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640 std::string |
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641 octave_eval_string_reader::get_input (bool& eof) |
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642 { |
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643 octave_quit (); |
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644 |
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645 eof = false; |
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646 |
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647 std::string retval; |
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648 |
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649 retval = eval_string; |
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650 |
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651 // Clear the eval string so that the next call will return |
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652 // an empty character string with EOF = true. |
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653 eval_string = ""; |
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654 |
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655 if (retval.empty ()) |
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656 eof = true; |
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657 |
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658 return retval; |
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659 } |
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660 |
581 | 661 // If the user simply hits return, this will produce an empty matrix. |
662 | |
2086 | 663 static octave_value_list |
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664 get_user_input (const octave_value_list& args, int nargout) |
529 | 665 { |
3100 | 666 octave_value_list retval; |
529 | 667 |
668 int nargin = args.length (); | |
669 | |
670 int read_as_string = 0; | |
671 | |
712 | 672 if (nargin == 2) |
529 | 673 read_as_string++; |
674 | |
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675 std::string prompt = args(0).string_value (); |
4975 | 676 |
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677 if (error_state) |
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678 { |
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679 error ("input: unrecognized argument"); |
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680 return retval; |
4975 | 681 } |
682 | |
2095 | 683 flush_octave_stdout (); |
529 | 684 |
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685 octave_pager_stream::reset (); |
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686 octave_diary_stream::reset (); |
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687 |
4565 | 688 octave_diary << prompt; |
689 | |
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690 bool eof = false; |
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691 |
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692 std::string input_buf = interactive_input (prompt.c_str (), eof); |
529 | 693 |
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694 if (! (error_state || input_buf.empty ())) |
529 | 695 { |
2927 | 696 size_t len = input_buf.length (); |
529 | 697 |
4565 | 698 octave_diary << input_buf; |
699 | |
700 if (input_buf[len - 1] != '\n') | |
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701 octave_diary << "\n"; |
4565 | 702 |
529 | 703 if (len < 1) |
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704 return read_as_string ? octave_value ("") : octave_value (Matrix ()); |
3772 | 705 |
706 if (read_as_string) | |
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707 { |
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708 // FIXME: fix gnu_readline and octave_gets instead! |
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709 if (input_buf.length () == 1 && input_buf[0] == '\n') |
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710 retval(0) = ""; |
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711 else |
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712 retval(0) = input_buf; |
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713 } |
529 | 714 else |
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715 { |
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716 int parse_status = 0; |
2900 | 717 |
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718 retval = eval_string (input_buf, true, parse_status, nargout); |
3100 | 719 |
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720 if (! Vdebugging && retval.length () == 0) |
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721 retval(0) = Matrix (); |
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722 } |
529 | 723 } |
724 else | |
725 error ("input: reading user-input failed!"); | |
726 | |
727 return retval; | |
728 } | |
729 | |
3100 | 730 DEFUN (input, args, nargout, |
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731 "-*- texinfo -*-\n\ |
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732 @deftypefn {Built-in Function} {@var{ans} =} input (@var{prompt})\n\ |
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733 @deftypefnx {Built-in Function} {@var{ans} =} input (@var{prompt}, \"s\")\n\ |
3372 | 734 Print a prompt and wait for user input. For example,\n\ |
735 \n\ | |
736 @example\n\ | |
737 input (\"Pick a number, any number! \")\n\ | |
738 @end example\n\ | |
739 \n\ | |
740 @noindent\n\ | |
741 prints the prompt\n\ | |
742 \n\ | |
743 @example\n\ | |
744 Pick a number, any number!\n\ | |
745 @end example\n\ | |
529 | 746 \n\ |
3372 | 747 @noindent\n\ |
748 and waits for the user to enter a value. The string entered by the user\n\ | |
749 is evaluated as an expression, so it may be a literal constant, a\n\ | |
750 variable name, or any other valid expression.\n\ | |
751 \n\ | |
752 Currently, @code{input} only returns one value, regardless of the number\n\ | |
753 of values produced by the evaluation of the expression.\n\ | |
754 \n\ | |
755 If you are only interested in getting a literal string value, you can\n\ | |
17281
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756 call @code{input} with the character string @qcode{\"s\"} as the second\n\ |
3372 | 757 argument. This tells Octave to return the string entered by the user\n\ |
758 directly, without evaluating it first.\n\ | |
759 \n\ | |
760 Because there may be output waiting to be displayed by the pager, it is\n\ | |
761 a good idea to always call @code{fflush (stdout)} before calling\n\ | |
762 @code{input}. This will ensure that all pending output is written to\n\ | |
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763 the screen before your prompt.\n\ |
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764 @seealso{yes_or_no, kbhit}\n\ |
3372 | 765 @end deftypefn") |
529 | 766 { |
2086 | 767 octave_value_list retval; |
529 | 768 |
769 int nargin = args.length (); | |
770 | |
712 | 771 if (nargin == 1 || nargin == 2) |
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772 retval = get_user_input (args, nargout); |
529 | 773 else |
5823 | 774 print_usage (); |
529 | 775 |
776 return retval; | |
777 } | |
778 | |
5640 | 779 bool |
780 octave_yes_or_no (const std::string& prompt) | |
781 { | |
782 std::string prompt_string = prompt + "(yes or no) "; | |
783 | |
784 while (1) | |
785 { | |
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786 bool eof = false; |
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787 |
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788 std::string input_buf = interactive_input (prompt_string, eof); |
5640 | 789 |
790 if (input_buf == "yes") | |
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791 return true; |
5640 | 792 else if (input_buf == "no") |
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793 return false; |
5640 | 794 else |
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795 message (0, "Please answer yes or no."); |
5640 | 796 } |
797 } | |
798 | |
799 DEFUN (yes_or_no, args, , | |
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800 "-*- texinfo -*-\n\ |
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801 @deftypefn {Built-in Function} {@var{ans} =} yes_or_no (\"@var{prompt}\")\n\ |
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802 Ask the user a yes-or-no question. Return logical true if the answer is yes\n\ |
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803 or false if the answer is no. Takes one argument, @var{prompt}, which is\n\ |
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804 the string to display when asking the question. @var{prompt} should end in\n\ |
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805 a space; @code{yes-or-no} adds the string @samp{(yes or no) } to it. The\n\ |
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806 user must confirm the answer with @key{RET} and can edit it until it has\n\ |
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807 been confirmed.\n\ |
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808 @seealso{input}\n\ |
5640 | 809 @end deftypefn") |
810 { | |
811 octave_value retval; | |
812 | |
813 int nargin = args.length (); | |
814 | |
815 if (nargin == 0 || nargin == 1) | |
816 { | |
817 std::string prompt; | |
818 | |
819 if (nargin == 1) | |
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820 { |
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821 prompt = args(0).string_value (); |
5640 | 822 |
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823 if (error_state) |
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824 { |
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825 error ("yes_or_no: PROMPT must be a character string"); |
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826 return retval; |
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827 } |
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828 } |
5640 | 829 |
830 retval = octave_yes_or_no (prompt); | |
831 } | |
832 else | |
5823 | 833 print_usage (); |
5640 | 834 |
835 return retval; | |
836 } | |
837 | |
3707 | 838 octave_value |
839 do_keyboard (const octave_value_list& args) | |
840 { | |
841 octave_value retval; | |
842 | |
843 int nargin = args.length (); | |
844 | |
845 assert (nargin == 0 || nargin == 1); | |
846 | |
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847 unwind_protect frame; |
3707 | 848 |
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849 frame.add_fcn (command_history::ignore_entries, |
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850 command_history::ignoring_entries ()); |
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851 |
3707 | 852 command_history::ignore_entries (false); |
853 | |
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854 frame.protect_var (Vdebugging); |
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855 |
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856 frame.add_fcn (octave_call_stack::restore_frame, |
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857 octave_call_stack::current_frame ()); |
3707 | 858 |
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859 // FIXME: probably we just want to print one line, not the |
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860 // entire statement, which might span many lines... |
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861 // |
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862 // tree_print_code tpc (octave_stdout); |
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863 // stmt.accept (tpc); |
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864 |
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865 Vdebugging = true; |
3707 | 866 |
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867 std::string prompt = "debug> "; |
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868 if (nargin > 0) |
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869 prompt = args(0).string_value (); |
4233 | 870 |
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871 if (! error_state) |
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872 get_debug_input (prompt); |
3707 | 873 |
874 return retval; | |
875 } | |
876 | |
1957 | 877 DEFUN (keyboard, args, , |
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878 "-*- texinfo -*-\n\ |
9300
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879 @deftypefn {Built-in Function} {} keyboard ()\n\ |
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880 @deftypefnx {Built-in Function} {} keyboard (\"@var{prompt}\")\n\ |
3372 | 881 This function is normally used for simple debugging. When the\n\ |
882 @code{keyboard} function is executed, Octave prints a prompt and waits\n\ | |
883 for user input. The input strings are then evaluated and the results\n\ | |
884 are printed. This makes it possible to examine the values of variables\n\ | |
9300
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885 within a function, and to assign new values if necessary. To leave the\n\ |
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886 prompt and return to normal execution type @samp{return} or @samp{dbcont}.\n\ |
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887 The @code{keyboard} function does not return an exit status.\n\ |
529 | 888 \n\ |
9300
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889 If @code{keyboard} is invoked without arguments, a default prompt of\n\ |
3372 | 890 @samp{debug> } is used.\n\ |
9300
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891 @seealso{dbcont, dbquit}\n\ |
3372 | 892 @end deftypefn") |
529 | 893 { |
2086 | 894 octave_value_list retval; |
529 | 895 |
896 int nargin = args.length (); | |
897 | |
712 | 898 if (nargin == 0 || nargin == 1) |
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899 { |
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900 unwind_protect frame; |
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901 |
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902 frame.add_fcn (octave_call_stack::restore_frame, |
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903 octave_call_stack::current_frame ()); |
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904 |
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905 // Skip the frame assigned to the keyboard function. |
9484
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906 octave_call_stack::goto_frame_relative (0); |
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907 |
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908 tree_evaluator::debug_mode = true; |
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909 |
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910 tree_evaluator::current_frame = octave_call_stack::current_frame (); |
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911 |
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912 do_keyboard (args); |
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913 } |
529 | 914 else |
5823 | 915 print_usage (); |
529 | 916 |
917 return retval; | |
918 } | |
919 | |
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920 DEFUN (echo, args, , |
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921 "-*- texinfo -*-\n\ |
11547 | 922 @deftypefn {Command} {} echo options\n\ |
3332 | 923 Control whether commands are displayed as they are executed. Valid\n\ |
924 options are:\n\ | |
1588 | 925 \n\ |
3332 | 926 @table @code\n\ |
927 @item on\n\ | |
928 Enable echoing of commands as they are executed in script files.\n\ | |
929 \n\ | |
930 @item off\n\ | |
931 Disable echoing of commands as they are executed in script files.\n\ | |
1588 | 932 \n\ |
3332 | 933 @item on all\n\ |
934 Enable echoing of commands as they are executed in script files and\n\ | |
935 functions.\n\ | |
1588 | 936 \n\ |
3332 | 937 @item off all\n\ |
938 Disable echoing of commands as they are executed in script files and\n\ | |
939 functions.\n\ | |
940 @end table\n\ | |
941 \n\ | |
942 @noindent\n\ | |
9134
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943 With no arguments, @code{echo} toggles the current echo state.\n\ |
11547 | 944 @end deftypefn") |
1588 | 945 { |
2086 | 946 octave_value_list retval; |
1588 | 947 |
1755 | 948 int argc = args.length () + 1; |
949 | |
1968 | 950 string_vector argv = args.make_argv ("echo"); |
1755 | 951 |
952 if (error_state) | |
953 return retval; | |
1588 | 954 |
955 switch (argc) | |
956 { | |
957 case 1: | |
958 { | |
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959 if ((Vecho_executing_commands & ECHO_SCRIPTS) |
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960 || (Vecho_executing_commands & ECHO_FUNCTIONS)) |
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961 Vecho_executing_commands = ECHO_OFF; |
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962 else |
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963 Vecho_executing_commands = ECHO_SCRIPTS; |
1588 | 964 } |
965 break; | |
966 | |
967 case 2: | |
968 { | |
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969 std::string arg = argv[1]; |
1755 | 970 |
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971 if (arg == "on") |
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972 Vecho_executing_commands = ECHO_SCRIPTS; |
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973 else if (arg == "off") |
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974 Vecho_executing_commands = ECHO_OFF; |
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975 else |
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976 print_usage (); |
1588 | 977 } |
978 break; | |
979 | |
980 case 3: | |
981 { | |
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982 std::string arg = argv[1]; |
1755 | 983 |
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984 if (arg == "on" && argv[2] == "all") |
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985 { |
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986 int tmp = (ECHO_SCRIPTS | ECHO_FUNCTIONS); |
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987 Vecho_executing_commands = tmp; |
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988 } |
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989 else if (arg == "off" && argv[2] == "all") |
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990 Vecho_executing_commands = ECHO_OFF; |
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991 else |
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992 print_usage (); |
1588 | 993 } |
994 break; | |
995 | |
996 default: | |
5823 | 997 print_usage (); |
1588 | 998 break; |
999 } | |
1000 | |
1001 return retval; | |
1002 } | |
1003 | |
2234 | 1004 DEFUN (completion_matches, args, nargout, |
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1005 "-*- texinfo -*-\n\ |
3332 | 1006 @deftypefn {Built-in Function} {} completion_matches (@var{hint})\n\ |
1007 Generate possible completions given @var{hint}.\n\ | |
2299 | 1008 \n\ |
1009 This function is provided for the benefit of programs like Emacs which\n\ | |
3332 | 1010 might be controlling Octave and handling user input. The current\n\ |
1011 command number is not incremented when this function is called. This is\n\ | |
1012 a feature, not a bug.\n\ | |
3333 | 1013 @end deftypefn") |
2234 | 1014 { |
2281 | 1015 octave_value retval; |
2234 | 1016 |
1017 int nargin = args.length (); | |
1018 | |
1019 if (nargin == 1) | |
1020 { | |
3523 | 1021 std::string hint = args(0).string_value (); |
2234 | 1022 |
1023 if (! error_state) | |
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1024 { |
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1025 int n = 32; |
2234 | 1026 |
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1027 string_vector list (n); |
2234 | 1028 |
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1029 int k = 0; |
2234 | 1030 |
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1031 for (;;) |
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1032 { |
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1033 std::string cmd = generate_completion (hint, k); |
2234 | 1034 |
10315
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1035 if (! cmd.empty ()) |
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1036 { |
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1037 if (k == n) |
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1038 { |
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1039 n *= 2; |
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1040 list.resize (n); |
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1041 } |
2235 | 1042 |
10315
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1043 list[k++] = cmd; |
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1044 } |
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1045 else |
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1046 { |
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1047 list.resize (k); |
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1048 break; |
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1049 } |
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1050 } |
2234 | 1051 |
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1052 if (nargout > 0) |
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1053 { |
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1054 if (! list.empty ()) |
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1055 retval = list; |
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1056 else |
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1057 retval = ""; |
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1058 } |
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1059 else |
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1060 { |
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1061 // We don't use string_vector::list_in_columns here |
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1062 // because it will be easier for Emacs if the names |
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1063 // appear in a single column. |
2235 | 1064 |
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1065 int len = list.length (); |
2234 | 1066 |
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1067 for (int i = 0; i < len; i++) |
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1068 octave_stdout << list[i] << "\n"; |
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1069 } |
2299 | 1070 |
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1071 octave_completion_matches_called = true; |
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1072 } |
2234 | 1073 } |
1074 else | |
5823 | 1075 print_usage (); |
2234 | 1076 |
1077 return retval; | |
1078 } | |
1079 | |
16879
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Rename read_readline_init_file to readline_read_init_file.
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1080 DEFUN (readline_read_init_file, args, , |
17787
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1081 "-*- texinfo -*-\n\ |
16879
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1082 @deftypefn {Built-in Function} {} readline_read_init_file (@var{file})\n\ |
7007 | 1083 Read the readline library initialization file @var{file}. If\n\ |
3448 | 1084 @var{file} is omitted, read the default initialization file (normally\n\ |
6615 | 1085 @file{~/.inputrc}).\n\ |
1086 \n\ | |
1087 @xref{Readline Init File, , , readline, GNU Readline Library},\n\ | |
1088 for details.\n\ | |
16880
1aebb613a5ac
Rename re_read_readline_init_file to readline_re_read_init_file.
Rik <rik@octave.org>
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1089 @seealso{readline_re_read_init_file}\n\ |
3448 | 1090 @end deftypefn") |
3189 | 1091 { |
1092 octave_value_list retval; | |
1093 | |
1094 int nargin = args.length (); | |
1095 | |
1096 if (nargin == 0) | |
1097 command_editor::read_init_file (); | |
1098 else if (nargin == 1) | |
1099 { | |
5872 | 1100 std::string file = args(0).string_value (); |
3189 | 1101 |
1102 if (! error_state) | |
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1103 command_editor::read_init_file (file); |
3189 | 1104 } |
1105 else | |
5823 | 1106 print_usage (); |
3189 | 1107 |
1108 return retval; | |
1109 } | |
1110 | |
16880
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Rename re_read_readline_init_file to readline_re_read_init_file.
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|
1111 DEFUN (readline_re_read_init_file, args, , |
17787
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1112 "-*- texinfo -*-\n\ |
16880
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|
1113 @deftypefn {Built-in Function} {} readline_re_read_init_file ()\n\ |
7758
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|
1114 Re-read the last readline library initialization file that was read.\n\ |
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1115 @xref{Readline Init File, , , readline, GNU Readline Library},\n\ |
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1116 for details.\n\ |
16879
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|
1117 @seealso{readline_read_init_file}\n\ |
7758
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|
1118 @end deftypefn") |
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1119 { |
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|
1120 octave_value_list retval; |
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1121 |
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1122 if (args.length () == 0) |
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1123 command_editor::re_read_init_file (); |
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1124 else |
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|
1125 print_usage (); |
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1126 |
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1127 return retval; |
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1128 } |
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1129 |
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|
1130 static int |
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1131 internal_input_event_hook_fcn (void) |
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1132 { |
16378
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1133 input_event_hook_functions.run (); |
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1134 |
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1135 if (input_event_hook_functions.empty ()) |
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1136 command_editor::remove_event_hook (internal_input_event_hook_fcn); |
16152
c48847a781d5
* input.cc (input_event_hook): Return 0.
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1137 |
c48847a781d5
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1138 return 0; |
3498 | 1139 } |
1140 | |
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1141 DEFUN (add_input_event_hook, args, , |
17787
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1142 "-*- texinfo -*-\n\ |
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1143 @deftypefn {Built-in Function} {@var{id} =} add_input_event_hook (@var{fcn})\n\ |
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1144 @deftypefnx {Built-in Function} {@var{id} =} add_input_event_hook (@var{fcn}, @var{data})\n\ |
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|
1145 Add the named function or function handle @var{fcn} to the list of functions\n\ |
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|
1146 to call periodically when Octave is waiting for input. The function should\n\ |
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1147 have the form\n\ |
10840 | 1148 \n\ |
3498 | 1149 @example\n\ |
1150 @var{fcn} (@var{data})\n\ | |
1151 @end example\n\ | |
1152 \n\ | |
1153 If @var{data} is omitted, Octave calls the function without any\n\ | |
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1154 arguments.\n\ |
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1155 \n\ |
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1156 The returned identifier may be used to remove the function handle from\n\ |
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1157 the list of input hook functions.\n\ |
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1158 @seealso{remove_input_event_hook}\n\ |
3498 | 1159 @end deftypefn") |
1160 { | |
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1161 octave_value retval; |
3498 | 1162 |
1163 int nargin = args.length (); | |
1164 | |
9215
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1165 if (nargin == 1 || nargin == 2) |
3498 | 1166 { |
9215
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1167 octave_value user_data; |
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1168 |
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1169 if (nargin == 2) |
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1170 user_data = args(1); |
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1171 |
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1172 hook_function hook_fcn (args(0), user_data); |
3498 | 1173 |
9215
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1174 if (! error_state) |
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1175 { |
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1176 if (input_event_hook_functions.empty ()) |
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1177 command_editor::add_event_hook (internal_input_event_hook_fcn); |
3498 | 1178 |
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1179 input_event_hook_functions.insert (hook_fcn.id (), hook_fcn); |
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1180 |
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1181 retval = hook_fcn.id (); |
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1182 } |
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1183 else |
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1184 error ("add_input_event_hook: expecting function handle or character string as first argument"); |
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1185 } |
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1186 else |
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1187 print_usage (); |
3498 | 1188 |
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1189 return retval; |
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1190 } |
3498 | 1191 |
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1192 DEFUN (remove_input_event_hook, args, , |
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|
1193 "-*- texinfo -*-\n\ |
16816
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1194 @deftypefn {Built-in Function} {} remove_input_event_hook (@var{name})\n\ |
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1195 @deftypefnx {Built-in Function} {} remove_input_event_hook (@var{fcn_id})\n\ |
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|
1196 Remove the named function or function handle with the given identifier\n\ |
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1197 from the list of functions to call periodically when Octave is waiting\n\ |
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1198 for input.\n\ |
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1199 @seealso{add_input_event_hook}\n\ |
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1200 @end deftypefn") |
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1201 { |
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1202 octave_value_list retval; |
3498 | 1203 |
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1204 int nargin = args.length (); |
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1205 |
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1206 if (nargin == 1 || nargin == 2) |
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1207 { |
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1208 std::string hook_fcn_id = args(0).string_value (); |
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1209 |
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1210 bool warn = (nargin < 2); |
3498 | 1211 |
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1212 if (! error_state) |
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1213 { |
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1214 hook_function_list::iterator p |
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1215 = input_event_hook_functions.find (hook_fcn_id); |
3498 | 1216 |
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1217 if (p != input_event_hook_functions.end ()) |
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1218 input_event_hook_functions.erase (p); |
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1219 else if (warn) |
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1220 warning ("remove_input_event_hook: %s not found in list", |
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1221 hook_fcn_id.c_str ()); |
3498 | 1222 |
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1223 if (input_event_hook_functions.empty ()) |
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1224 command_editor::remove_event_hook (internal_input_event_hook_fcn); |
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1225 } |
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1226 else |
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1227 error ("remove_input_event_hook: argument not valid as a hook function name or id"); |
3498 | 1228 } |
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1229 else |
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1230 print_usage (); |
3498 | 1231 |
1232 return retval; | |
1233 } | |
1234 | |
5794 | 1235 DEFUN (PS1, args, nargout, |
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1236 "-*- texinfo -*-\n\ |
10840 | 1237 @deftypefn {Built-in Function} {@var{val} =} PS1 ()\n\ |
5794 | 1238 @deftypefnx {Built-in Function} {@var{old_val} =} PS1 (@var{new_val})\n\ |
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1239 @deftypefnx {Built-in Function} {} PS1 (@var{new_val}, \"local\")\n\ |
5794 | 1240 Query or set the primary prompt string. When executing interactively,\n\ |
1241 Octave displays the primary prompt when it is ready to read a command.\n\ | |
3332 | 1242 \n\ |
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1243 The default value of the primary prompt string is @qcode{\"octave:\\#> \"}.\n\ |
5794 | 1244 To change it, use a command like\n\ |
3332 | 1245 \n\ |
1246 @example\n\ | |
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1247 PS1 (\"\\\\u@@\\\\H> \")\n\ |
3332 | 1248 @end example\n\ |
1249 \n\ | |
1250 @noindent\n\ | |
1251 which will result in the prompt @samp{boris@@kremvax> } for the user\n\ | |
1252 @samp{boris} logged in on the host @samp{kremvax.kgb.su}. Note that two\n\ | |
5794 | 1253 backslashes are required to enter a backslash into a double-quoted\n\ |
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1254 character string. @xref{Strings}.\n\ |
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1255 \n\ |
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1256 You can also use ANSI escape sequences if your terminal supports them.\n\ |
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1257 This can be useful for coloring the prompt. For example,\n\ |
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1258 \n\ |
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1259 @example\n\ |
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1260 PS1 (\"\\\\[\\\\033[01;31m\\\\]\\\\s:\\\\#> \\\\[\\\\033[0m\\\\]\")\n\ |
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1261 @end example\n\ |
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1262 \n\ |
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1263 @noindent\n\ |
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1264 will give the default Octave prompt a red coloring.\n\ |
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1265 \n\ |
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1266 When called from inside a function with the @qcode{\"local\"} option, the\n\ |
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1267 variable is changed locally for the function and any subroutines it calls. \n\ |
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1268 The original variable value is restored when exiting the function.\n\ |
6373 | 1269 @seealso{PS2, PS4}\n\ |
5794 | 1270 @end deftypefn") |
1271 { | |
1272 return SET_INTERNAL_VARIABLE (PS1); | |
1273 } | |
2181 | 1274 |
5794 | 1275 DEFUN (PS2, args, nargout, |
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1276 "-*- texinfo -*-\n\ |
10840 | 1277 @deftypefn {Built-in Function} {@var{val} =} PS2 ()\n\ |
5794 | 1278 @deftypefnx {Built-in Function} {@var{old_val} =} PS2 (@var{new_val})\n\ |
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1279 @deftypefnx {Built-in Function} {} PS2 (@var{new_val}, \"local\")\n\ |
5794 | 1280 Query or set the secondary prompt string. The secondary prompt is\n\ |
1281 printed when Octave is expecting additional input to complete a\n\ | |
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1282 command. For example, if you are typing a @code{for} loop that spans several\n\ |
5794 | 1283 lines, Octave will print the secondary prompt at the beginning of\n\ |
1284 each line after the first. The default value of the secondary prompt\n\ | |
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1285 string is @qcode{\"> \"}.\n\ |
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1286 \n\ |
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1287 When called from inside a function with the @qcode{\"local\"} option, the\n\ |
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1288 variable is changed locally for the function and any subroutines it calls. \n\ |
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1289 The original variable value is restored when exiting the function.\n\ |
5794 | 1290 @seealso{PS1, PS4}\n\ |
1291 @end deftypefn") | |
1292 { | |
1293 return SET_INTERNAL_VARIABLE (PS2); | |
1294 } | |
2181 | 1295 |
5794 | 1296 DEFUN (PS4, args, nargout, |
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1297 "-*- texinfo -*-\n\ |
10840 | 1298 @deftypefn {Built-in Function} {@var{val} =} PS4 ()\n\ |
5794 | 1299 @deftypefnx {Built-in Function} {@var{old_val} =} PS4 (@var{new_val})\n\ |
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1300 @deftypefnx {Built-in Function} {} PS4 (@var{new_val}, \"local\")\n\ |
5794 | 1301 Query or set the character string used to prefix output produced\n\ |
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1302 when echoing commands is enabled.\n\ |
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1303 The default value is @qcode{\"+ \"}.\n\ |
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1304 @xref{Diary and Echo Commands}, for a description of echoing commands.\n\ |
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1305 \n\ |
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|
1306 When called from inside a function with the @qcode{\"local\"} option, the\n\ |
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|
1307 variable is changed locally for the function and any subroutines it calls. \n\ |
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1308 The original variable value is restored when exiting the function.\n\ |
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1309 @seealso{echo, echo_executing_commands, PS1, PS2}\n\ |
5794 | 1310 @end deftypefn") |
1311 { | |
1312 return SET_INTERNAL_VARIABLE (PS4); | |
1313 } | |
2181 | 1314 |
5794 | 1315 DEFUN (completion_append_char, args, nargout, |
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|
1316 "-*- texinfo -*-\n\ |
10840 | 1317 @deftypefn {Built-in Function} {@var{val} =} completion_append_char ()\n\ |
5794 | 1318 @deftypefnx {Built-in Function} {@var{old_val} =} completion_append_char (@var{new_val})\n\ |
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1319 @deftypefnx {Built-in Function} {} completion_append_char (@var{new_val}, \"local\")\n\ |
5794 | 1320 Query or set the internal character variable that is appended to\n\ |
1321 successful command-line completion attempts. The default\n\ | |
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1322 value is @qcode{\" \"} (a single space).\n\ |
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1323 \n\ |
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1324 When called from inside a function with the @qcode{\"local\"} option, the\n\ |
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|
1325 variable is changed locally for the function and any subroutines it calls. \n\ |
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1326 The original variable value is restored when exiting the function.\n\ |
5794 | 1327 @end deftypefn") |
1328 { | |
1329 return SET_INTERNAL_VARIABLE (completion_append_char); | |
1330 } | |
3019 | 1331 |
5794 | 1332 DEFUN (echo_executing_commands, args, nargout, |
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1333 "-*- texinfo -*-\n\ |
10840 | 1334 @deftypefn {Built-in Function} {@var{val} =} echo_executing_commands ()\n\ |
5794 | 1335 @deftypefnx {Built-in Function} {@var{old_val} =} echo_executing_commands (@var{new_val})\n\ |
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1336 @deftypefnx {Built-in Function} {} echo_executing_commands (@var{new_val}, \"local\")\n\ |
5794 | 1337 Query or set the internal variable that controls the echo state.\n\ |
1338 It may be the sum of the following values:\n\ | |
3332 | 1339 \n\ |
1340 @table @asis\n\ | |
1341 @item 1\n\ | |
1342 Echo commands read from script files.\n\ | |
1343 \n\ | |
1344 @item 2\n\ | |
1345 Echo commands from functions.\n\ | |
1346 \n\ | |
1347 @item 4\n\ | |
1348 Echo commands read from command line.\n\ | |
1349 @end table\n\ | |
1350 \n\ | |
1351 More than one state can be active at once. For example, a value of 3 is\n\ | |
1352 equivalent to the command @kbd{echo on all}.\n\ | |
1353 \n\ | |
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1354 The value of @code{echo_executing_commands} may be set by the @kbd{echo}\n\ |
10840 | 1355 command or the command line option @option{--echo-commands}.\n\ |
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1356 \n\ |
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1357 When called from inside a function with the @qcode{\"local\"} option, the\n\ |
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1358 variable is changed locally for the function and any subroutines it calls. \n\ |
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1359 The original variable value is restored when exiting the function.\n\ |
5794 | 1360 @end deftypefn") |
1361 { | |
1362 return SET_INTERNAL_VARIABLE (echo_executing_commands); | |
2181 | 1363 } |
1364 | |
6257 | 1365 DEFUN (__request_drawnow__, args, , |
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1366 "-*- texinfo -*-\n\ |
10840 | 1367 @deftypefn {Built-in Function} {} __request_drawnow__ ()\n\ |
6257 | 1368 @deftypefnx {Built-in Function} {} __request_drawnow__ (@var{flag})\n\ |
6945 | 1369 Undocumented internal function.\n\ |
6257 | 1370 @end deftypefn") |
1371 { | |
1372 octave_value retval; | |
1373 | |
1374 int nargin = args.length (); | |
1375 | |
1376 if (nargin == 0) | |
1377 Vdrawnow_requested = true; | |
1378 else if (nargin == 1) | |
1379 Vdrawnow_requested = args(0).bool_value (); | |
1380 else | |
1381 print_usage (); | |
1382 | |
1383 return retval; | |
1384 } | |
1385 | |
7294 | 1386 DEFUN (__gud_mode__, args, , |
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1387 "-*- texinfo -*-\n\ |
7294 | 1388 @deftypefn {Built-in Function} {} __gud_mode__ ()\n\ |
1389 Undocumented internal function.\n\ | |
1390 @end deftypefn") | |
1391 { | |
1392 octave_value retval; | |
1393 | |
1394 int nargin = args.length (); | |
1395 | |
1396 if (nargin == 0) | |
1397 retval = Vgud_mode; | |
1398 else if (nargin == 1) | |
1399 Vgud_mode = args(0).bool_value (); | |
1400 else | |
1401 print_usage (); | |
1402 | |
1403 return retval; | |
1404 } | |
1405 | |
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1406 DEFUN (filemarker, args, nargout, |
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1407 "-*- texinfo -*-\n\ |
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1408 @deftypefn {Built-in Function} {@var{val} =} filemarker ()\n\ |
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1409 @deftypefnx {Built-in Function} {} filemarker (@var{new_val})\n\ |
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1410 @deftypefnx {Built-in Function} {} filemarker (@var{new_val}, \"local\")\n\ |
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1411 Query or set the character used to separate filename from the\n\ |
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1412 the subfunction names contained within the file. This can be used in\n\ |
10840 | 1413 a generic manner to interact with subfunctions. For example,\n\ |
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1414 \n\ |
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1415 @example\n\ |
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1416 help ([\"myfunc\", filemarker, \"mysubfunc\"])\n\ |
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1417 @end example\n\ |
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1418 \n\ |
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1419 @noindent\n\ |
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1420 returns the help string associated with the subfunction @code{mysubfunc}\n\ |
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1421 of the function @code{myfunc}. Another use of @code{filemarker} is when\n\ |
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1422 debugging it allows easier placement of breakpoints within subfunctions.\n\ |
10840 | 1423 For example,\n\ |
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1424 \n\ |
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1425 @example\n\ |
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1426 dbstop ([\"myfunc\", filemarker, \"mysubfunc\"])\n\ |
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1427 @end example\n\ |
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1428 \n\ |
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1429 @noindent\n\ |
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1430 will set a breakpoint at the first line of the subfunction @code{mysubfunc}.\n\ |
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1431 \n\ |
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1432 When called from inside a function with the @qcode{\"local\"} option, the\n\ |
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1433 variable is changed locally for the function and any subroutines it calls. \n\ |
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1434 The original variable value is restored when exiting the function.\n\ |
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1435 @end deftypefn") |
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1436 { |
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1437 char tmp = Vfilemarker; |
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1438 octave_value retval = SET_INTERNAL_VARIABLE (filemarker); |
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1439 |
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1440 // The character passed must not be a legal character for a function name |
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1441 if (! error_state && (::isalnum (Vfilemarker) || Vfilemarker == '_')) |
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1442 { |
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1443 Vfilemarker = tmp; |
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1444 error ("filemarker: character can not be a valid character for a function name"); |
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1445 } |
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1446 |
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1447 return retval; |
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1448 } |