Mercurial > hg > octave-lyh
annotate src/input.cc @ 11413:ae0deb52af27
Correct use of xref macro to prevent Texinfo warning.
| author | Rik <octave@nomad.inbox5.com> |
|---|---|
| date | Sat, 25 Dec 2010 07:43:04 -0800 |
| parents | 51b6193e90bb |
| children | fd0a3ac60b0e |
| rev | line source |
|---|---|
| 1 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 8920 | 4 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 John W. Eaton |
| 1 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 1 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 1 | 21 |
| 22 */ | |
| 23 | |
| 2939 | 24 // Get command input interactively or from files. |
| 1 | 25 |
| 240 | 26 #ifdef HAVE_CONFIG_H |
| 1192 | 27 #include <config.h> |
| 1 | 28 #endif |
| 29 | |
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30 #include <cstdio> |
| 1343 | 31 #include <cstdlib> |
| 32 #include <cstring> | |
| 33 #include <cassert> | |
| 34 | |
| 3503 | 35 #include <iostream> |
| 5765 | 36 #include <sstream> |
| 1728 | 37 #include <string> |
| 38 | |
| 529 | 39 #include <sys/types.h> |
| 40 #include <unistd.h> | |
| 1343 | 41 |
| 2927 | 42 #include "cmd-edit.h" |
| 3189 | 43 #include "file-ops.h" |
| 4153 | 44 #include "quit.h" |
| 1755 | 45 #include "str-vec.h" |
| 46 | |
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47 #include "debug.h" |
| 1352 | 48 #include "defun.h" |
| 49 #include "dirfns.h" | |
| 1 | 50 #include "error.h" |
| 2181 | 51 #include "gripes.h" |
| 3016 | 52 #include "help.h" |
| 1 | 53 #include "input.h" |
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54 #include "lex.h" |
| 5832 | 55 #include "load-path.h" |
| 1352 | 56 #include "oct-map.h" |
| 1742 | 57 #include "oct-hist.h" |
| 1670 | 58 #include "toplev.h" |
| 1755 | 59 #include "oct-obj.h" |
| 1 | 60 #include "pager.h" |
| 529 | 61 #include "parse.h" |
| 1352 | 62 #include "pathlen.h" |
| 3772 | 63 #include "pt.h" |
| 1755 | 64 #include "pt-const.h" |
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65 #include "pt-eval.h" |
| 3805 | 66 #include "pt-stmt.h" |
| 1352 | 67 #include "sighandlers.h" |
| 1114 | 68 #include "sysdep.h" |
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69 #include "toplev.h" |
| 3098 | 70 #include "unwind-prot.h" |
| 1352 | 71 #include "utils.h" |
| 72 #include "variables.h" | |
| 529 | 73 |
| 2181 | 74 // Primary prompt string. |
| 5794 | 75 static std::string VPS1 = "\\s:\\#> "; |
| 2181 | 76 |
| 77 // Secondary prompt string. | |
| 5794 | 78 static std::string VPS2 = "> "; |
| 2181 | 79 |
| 80 // String printed before echoed input (enabled by --echo-input). | |
| 5794 | 81 std::string VPS4 = "+ "; |
| 2181 | 82 |
| 3019 | 83 // Echo commands as they are executed? |
| 84 // | |
| 85 // 1 ==> echo commands read from script files | |
| 86 // 2 ==> echo commands from functions | |
| 87 // 4 ==> echo commands read from command line | |
| 88 // | |
| 89 // more than one state can be active at once. | |
| 5794 | 90 int Vecho_executing_commands = ECHO_OFF; |
| 3019 | 91 |
| 3165 | 92 // The time we last printed a prompt. |
| 5832 | 93 octave_time Vlast_prompt_time = 0.0; |
| 3165 | 94 |
| 2181 | 95 // Character to append after successful command-line completion attempts. |
| 5794 | 96 static char Vcompletion_append_char = ' '; |
| 2181 | 97 |
| 1 | 98 // Global pointer for eval(). |
| 3523 | 99 std::string current_eval_string; |
| 1 | 100 |
| 3019 | 101 // TRUE means get input from current_eval_string. |
| 102 bool get_input_from_eval_string = false; | |
| 1 | 103 |
| 3877 | 104 // TRUE means we haven't been asked for the input from |
| 105 // current_eval_string yet. | |
| 106 bool input_from_eval_string_pending = false; | |
| 107 | |
| 5189 | 108 // TRUE means that input is coming from a file that was named on |
| 109 // the command line. | |
| 110 bool input_from_command_line_file = false; | |
| 111 | |
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112 // TRUE means that stdin is a terminal, not a pipe or redirected file. |
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113 bool stdin_is_tty = false; |
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114 |
| 3019 | 115 // TRUE means we're parsing a function file. |
| 116 bool reading_fcn_file = false; | |
| 1 | 117 |
| 9476 | 118 // TRUE means we're parsing a classdef file. |
| 119 bool reading_classdef_file = false; | |
| 120 | |
| 338 | 121 // Simple name of function file we are reading. |
| 3523 | 122 std::string curr_fcn_file_name; |
| 1606 | 123 |
| 124 // Full name of file we are reading. | |
| 3523 | 125 std::string curr_fcn_file_full_name; |
| 1 | 126 |
| 3019 | 127 // TRUE means we're parsing a script file. |
| 128 bool reading_script_file = false; | |
| 1 | 129 |
| 130 // If we are reading from an M-file, this is it. | |
| 529 | 131 FILE *ff_instream = 0; |
| 1 | 132 |
| 3019 | 133 // TRUE means this is an interactive shell. |
| 134 bool interactive = false; | |
| 1 | 135 |
| 3019 | 136 // TRUE means the user forced this shell to be interactive (-i). |
| 137 bool forced_interactive = false; | |
| 1 | 138 |
| 139 // Should we issue a prompt? | |
| 140 int promptflag = 1; | |
| 141 | |
| 142 // The current line of input, from wherever. | |
| 3523 | 143 std::string current_input_line; |
| 1 | 144 |
| 3804 | 145 // TRUE after a call to completion_matches. |
| 2299 | 146 bool octave_completion_matches_called = false; |
| 147 | |
| 6257 | 148 // TRUE if the plotting system has requested a call to drawnow at |
| 149 // the next user prompt. | |
| 7409 | 150 bool Vdrawnow_requested = false; |
| 6257 | 151 |
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152 // TRUE if we are in debugging mode. |
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153 bool Vdebugging = false; |
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154 |
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155 // If we are in debugging mode, this is the last command entered, so |
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156 // that we can repeat the previous command if the user just types RET. |
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157 static std::string last_debugging_command; |
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158 |
| 7294 | 159 // TRUE if we are running in the Emacs GUD mode. |
| 160 static bool Vgud_mode = false; | |
| 161 | |
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162 // The filemarker used to separate filenames from subfunction names |
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163 char Vfilemarker = '>'; |
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164 |
| 1044 | 165 static void |
| 3523 | 166 do_input_echo (const std::string& input_string) |
| 1044 | 167 { |
| 1588 | 168 int do_echo = reading_script_file ? |
| 2205 | 169 (Vecho_executing_commands & ECHO_SCRIPTS) |
| 2618 | 170 : (Vecho_executing_commands & ECHO_CMD_LINE) && ! forced_interactive; |
| 1588 | 171 |
| 172 if (do_echo) | |
| 1044 | 173 { |
| 1403 | 174 if (forced_interactive) |
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175 { |
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176 if (promptflag > 0) |
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177 octave_stdout << command_editor::decode_prompt_string (VPS1); |
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178 else |
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179 octave_stdout << command_editor::decode_prompt_string (VPS2); |
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180 } |
| 1403 | 181 else |
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182 octave_stdout << command_editor::decode_prompt_string (VPS4); |
| 1044 | 183 |
| 1755 | 184 if (! input_string.empty ()) |
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185 { |
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186 octave_stdout << input_string; |
| 1755 | 187 |
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188 if (input_string[input_string.length () - 1] != '\n') |
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189 octave_stdout << "\n"; |
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190 } |
| 1044 | 191 } |
| 192 } | |
| 193 | |
| 3536 | 194 std::string |
| 3523 | 195 gnu_readline (const std::string& s, bool force_readline) |
| 1822 | 196 { |
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197 octave_quit (); |
| 5142 | 198 |
| 3523 | 199 std::string retval; |
| 1822 | 200 |
| 2927 | 201 if (line_editing || force_readline) |
| 1822 | 202 { |
| 3219 | 203 bool eof; |
| 1898 | 204 |
| 3219 | 205 retval = command_editor::readline (s, eof); |
| 206 | |
| 207 if (! eof && retval.empty ()) | |
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208 retval = "\n"; |
| 1822 | 209 } |
| 210 else | |
| 211 { | |
| 2927 | 212 if (! s.empty () && (interactive || forced_interactive)) |
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213 { |
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214 FILE *stream = command_editor::get_output_stream (); |
| 2927 | 215 |
| 10411 | 216 gnulib::fputs (s.c_str (), stream); |
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217 fflush (stream); |
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218 } |
| 1822 | 219 |
| 2927 | 220 FILE *curr_stream = command_editor::get_input_stream (); |
| 221 | |
| 9476 | 222 if (reading_fcn_file || reading_script_file || reading_classdef_file) |
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223 curr_stream = ff_instream; |
| 1822 | 224 |
| 2927 | 225 retval = octave_fgets (curr_stream); |
| 1822 | 226 } |
| 227 | |
| 228 return retval; | |
| 229 } | |
| 581 | 230 |
| 6257 | 231 static inline std::string |
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232 interactive_input (const std::string& s, bool force_readline = false) |
| 6257 | 233 { |
| 234 Vlast_prompt_time.stamp (); | |
| 235 | |
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236 if (Vdrawnow_requested && (interactive || forced_interactive)) |
| 6257 | 237 { |
| 238 feval ("drawnow"); | |
| 239 | |
| 6367 | 240 flush_octave_stdout (); |
| 241 | |
| 6305 | 242 // We set Vdrawnow_requested to false even if there is an error |
| 243 // in drawnow so that the error doesn't reappear at every prompt. | |
| 244 | |
| 6257 | 245 Vdrawnow_requested = false; |
| 6305 | 246 |
| 247 if (error_state) | |
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248 return "\n"; |
| 6257 | 249 } |
| 250 | |
| 251 return gnu_readline (s, force_readline); | |
| 252 } | |
| 253 | |
| 3536 | 254 static std::string |
| 1 | 255 octave_gets (void) |
| 256 { | |
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257 octave_quit (); |
| 5142 | 258 |
| 3523 | 259 std::string retval; |
| 1 | 260 |
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261 bool history_skip_auto_repeated_debugging_command = false; |
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262 |
| 1822 | 263 if ((interactive || forced_interactive) |
| 5832 | 264 && (! (reading_fcn_file |
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265 || reading_classdef_file |
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266 || reading_script_file |
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267 || get_input_from_eval_string |
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268 || input_from_startup_file |
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269 || input_from_command_line_file))) |
| 1 | 270 { |
| 5794 | 271 std::string ps = (promptflag > 0) ? VPS1 : VPS2; |
| 1755 | 272 |
| 3523 | 273 std::string prompt = command_editor::decode_prompt_string (ps); |
| 1 | 274 |
| 2618 | 275 pipe_handler_error_count = 0; |
| 276 | |
| 277 flush_octave_stdout (); | |
| 1 | 278 |
| 2095 | 279 octave_diary << prompt; |
| 581 | 280 |
| 6257 | 281 retval = interactive_input (prompt); |
| 5832 | 282 |
| 283 // There is no need to update the load_path cache if there is no | |
| 284 // user input. | |
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285 if (! retval.empty () |
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286 && retval.find_first_not_of (" \t\n\r") != std::string::npos) |
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287 { |
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288 load_path::update (); |
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289 |
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290 if (Vdebugging) |
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291 last_debugging_command = retval; |
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292 else |
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293 last_debugging_command = std::string (); |
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294 } |
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295 else if (Vdebugging) |
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296 { |
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297 retval = last_debugging_command; |
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298 history_skip_auto_repeated_debugging_command = true; |
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299 } |
| 1 | 300 } |
| 301 else | |
| 1822 | 302 retval = gnu_readline (""); |
| 1 | 303 |
| 2927 | 304 current_input_line = retval; |
| 1 | 305 |
| 1822 | 306 if (! current_input_line.empty ()) |
| 1 | 307 { |
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308 if (! (input_from_startup_file || input_from_command_line_file |
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309 || history_skip_auto_repeated_debugging_command)) |
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310 command_history::add (current_input_line); |
| 1 | 311 |
| 9476 | 312 if (! (reading_fcn_file || reading_script_file || reading_classdef_file)) |
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313 { |
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314 octave_diary << current_input_line; |
| 3176 | 315 |
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316 if (current_input_line[current_input_line.length () - 1] != '\n') |
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317 octave_diary << "\n"; |
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318 } |
| 581 | 319 |
| 1822 | 320 do_input_echo (current_input_line); |
| 1 | 321 } |
| 9476 | 322 else if (! (reading_fcn_file || reading_script_file || reading_classdef_file)) |
| 3176 | 323 octave_diary << "\n"; |
| 9476 | 324 |
| 1822 | 325 return retval; |
| 1 | 326 } |
| 327 | |
| 581 | 328 // Read a line from the input stream. |
| 329 | |
| 3536 | 330 static std::string |
| 1822 | 331 get_user_input (void) |
| 1 | 332 { |
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333 octave_quit (); |
| 5142 | 334 |
| 3523 | 335 std::string retval; |
| 1 | 336 |
| 337 if (get_input_from_eval_string) | |
| 338 { | |
| 3877 | 339 if (input_from_eval_string_pending) |
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340 { |
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341 input_from_eval_string_pending = false; |
| 3877 | 342 |
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343 retval = current_eval_string; |
| 1822 | 344 |
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345 size_t len = retval.length (); |
| 1822 | 346 |
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347 if (len > 0 && retval[len-1] != '\n') |
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348 retval.append ("\n"); |
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349 } |
| 1822 | 350 } |
| 351 else | |
| 352 retval = octave_gets (); | |
| 353 | |
| 2927 | 354 current_input_line = retval; |
| 1822 | 355 |
| 356 return retval; | |
| 357 } | |
| 358 | |
| 359 int | |
| 360 octave_read (char *buf, unsigned max_size) | |
| 361 { | |
| 5775 | 362 // FIXME -- is this a safe way to buffer the input? |
| 2927 | 363 |
| 4046 | 364 static const char * const eol = "\n"; |
| 3523 | 365 static std::string input_buf; |
| 2927 | 366 static const char *pos = 0; |
| 367 static size_t chars_left = 0; | |
| 1822 | 368 |
| 369 int status = 0; | |
| 4046 | 370 if (chars_left == 0) |
| 1822 | 371 { |
| 2927 | 372 pos = 0; |
| 373 | |
| 374 input_buf = get_user_input (); | |
| 1822 | 375 |
| 2927 | 376 chars_left = input_buf.length (); |
| 377 | |
| 378 pos = input_buf.c_str (); | |
| 1822 | 379 } |
| 380 | |
| 381 if (chars_left > 0) | |
| 382 { | |
| 4046 | 383 size_t len = max_size > chars_left ? chars_left : max_size; |
| 2927 | 384 assert (len > 0); |
| 385 | |
| 4046 | 386 memcpy (buf, pos, len); |
| 1822 | 387 |
| 4046 | 388 chars_left -= len; |
| 389 pos += len; | |
| 1822 | 390 |
| 4046 | 391 // Make sure input ends with a new line character. |
| 392 if (chars_left == 0 && buf[len-1] != '\n') | |
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393 { |
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394 if (len < max_size) |
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395 { |
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396 // There is enough room to plug the newline character in |
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397 // the buffer. |
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398 buf[len++] = '\n'; |
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399 } |
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400 else |
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401 { |
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402 // There isn't enough room to plug the newline character |
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403 // in the buffer so make sure it is returned on the next |
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404 // octave_read call. |
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405 pos = eol; |
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406 chars_left = 1; |
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407 } |
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408 } |
| 1822 | 409 |
| 4046 | 410 status = len; |
| 1 | 411 |
| 1044 | 412 } |
| 1822 | 413 else if (chars_left == 0) |
| 2862 | 414 { |
| 415 status = 0; | |
| 416 } | |
| 9476 | 417 else |
| 1822 | 418 status = -1; |
| 1044 | 419 |
| 1 | 420 return status; |
| 421 } | |
| 422 | |
| 581 | 423 // Fix things up so that input can come from file `name', printing a |
| 424 // warning if the file doesn't exist. | |
| 425 | |
| 1 | 426 FILE * |
| 3523 | 427 get_input_from_file (const std::string& name, int warn) |
| 1 | 428 { |
| 529 | 429 FILE *instream = 0; |
| 1 | 430 |
| 1750 | 431 if (name.length () > 0) |
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432 instream = fopen (name.c_str (), "rb"); |
| 1 | 433 |
| 529 | 434 if (! instream && warn) |
| 1750 | 435 warning ("%s: no such file or directory", name.c_str ()); |
| 1 | 436 |
| 9476 | 437 if (reading_fcn_file || reading_script_file || reading_classdef_file) |
| 339 | 438 ff_instream = instream; |
| 1 | 439 else |
| 2927 | 440 command_editor::set_input_stream (instream); |
| 1 | 441 |
| 442 return instream; | |
| 443 } | |
| 444 | |
| 581 | 445 // Fix things up so that input can come from the standard input. This |
| 446 // may need to become much more complicated, which is why it's in a | |
| 447 // separate function. | |
| 448 | |
| 1 | 449 FILE * |
| 450 get_input_from_stdin (void) | |
| 451 { | |
| 2927 | 452 command_editor::set_input_stream (stdin); |
| 453 return command_editor::get_input_stream (); | |
| 1 | 454 } |
| 455 | |
| 5775 | 456 // FIXME -- make this generate file names when appropriate. |
| 2921 | 457 |
| 2247 | 458 static string_vector |
| 3523 | 459 generate_possible_completions (const std::string& text, std::string& prefix, |
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460 std::string& hint) |
| 1280 | 461 { |
| 2247 | 462 string_vector names; |
| 1280 | 463 |
| 2921 | 464 prefix = ""; |
| 1280 | 465 |
| 4604 | 466 if (looks_like_struct (text)) |
| 1430 | 467 names = generate_struct_completions (text, prefix, hint); |
| 468 else | |
| 2247 | 469 names = make_name_list (); |
| 1280 | 470 |
| 2944 | 471 // Sort and remove duplicates. |
| 2348 | 472 |
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473 names.sort (true); |
| 2348 | 474 |
| 1280 | 475 return names; |
| 476 } | |
| 477 | |
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478 static bool |
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479 is_completing_dirfns (void) |
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480 { |
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481 static std::string dirfns_commands[] = {"cd", "ls"}; |
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482 static const size_t dirfns_commands_length = 2; |
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483 |
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484 bool retval = false; |
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485 |
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486 std::string line = command_editor::get_line_buffer (); |
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487 |
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488 for (size_t i = 0; i < dirfns_commands_length; i++) |
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489 { |
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490 int index = line.find (dirfns_commands[i] + " "); |
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491 |
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492 if (index == 0) |
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493 { |
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494 retval = true; |
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495 break; |
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496 } |
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497 } |
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498 |
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499 return retval; |
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500 } |
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501 |
| 3536 | 502 static std::string |
| 3523 | 503 generate_completion (const std::string& text, int state) |
| 1280 | 504 { |
| 3523 | 505 std::string retval; |
| 2944 | 506 |
| 3523 | 507 static std::string prefix; |
| 508 static std::string hint; | |
| 1280 | 509 |
| 2921 | 510 static size_t hint_len = 0; |
| 1280 | 511 |
| 1 | 512 static int list_index = 0; |
| 2921 | 513 static int name_list_len = 0; |
| 4604 | 514 static int name_list_total_len = 0; |
| 2247 | 515 static string_vector name_list; |
| 4604 | 516 static string_vector file_name_list; |
| 1 | 517 |
| 1280 | 518 static int matches = 0; |
| 1 | 519 |
| 520 if (state == 0) | |
| 521 { | |
| 522 list_index = 0; | |
| 523 | |
| 2921 | 524 prefix = ""; |
| 1280 | 525 |
| 2921 | 526 hint = text; |
| 1280 | 527 |
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528 // No reason to display symbols while completing a |
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529 // file/directory operation. |
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530 |
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531 if (is_completing_dirfns ()) |
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532 name_list = string_vector (); |
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533 else |
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534 name_list = generate_possible_completions (text, prefix, hint); |
| 1280 | 535 |
| 2921 | 536 name_list_len = name_list.length (); |
| 537 | |
| 4604 | 538 file_name_list = command_editor::generate_filename_completions (text); |
| 539 | |
| 540 name_list.append (file_name_list); | |
| 541 | |
| 542 name_list_total_len = name_list.length (); | |
| 543 | |
| 2921 | 544 hint_len = hint.length (); |
| 1280 | 545 |
| 546 matches = 0; | |
| 2247 | 547 |
| 2921 | 548 for (int i = 0; i < name_list_len; i++) |
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549 if (hint == name_list[i].substr (0, hint_len)) |
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550 matches++; |
| 1 | 551 } |
| 552 | |
| 4604 | 553 if (name_list_total_len > 0 && matches > 0) |
| 1 | 554 { |
| 4604 | 555 while (list_index < name_list_total_len) |
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556 { |
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557 std::string name = name_list[list_index]; |
| 2247 | 558 |
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559 list_index++; |
| 2247 | 560 |
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561 if (hint == name.substr (0, hint_len)) |
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562 { |
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563 if (list_index <= name_list_len && ! prefix.empty ()) |
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564 retval = prefix + "." + name; |
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565 else |
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566 retval = name; |
| 1280 | 567 |
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568 // FIXME -- looks_like_struct is broken for now, |
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569 // so it always returns false. |
| 4179 | 570 |
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571 if (matches == 1 && looks_like_struct (retval)) |
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572 { |
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573 // Don't append anything, since we don't know |
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574 // whether it should be '(' or '.'. |
| 4179 | 575 |
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576 command_editor::set_completion_append_character ('\0'); |
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577 } |
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578 else |
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579 command_editor::set_completion_append_character |
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580 (Vcompletion_append_char); |
| 1280 | 581 |
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582 break; |
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583 } |
|
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584 } |
| 1 | 585 } |
| 586 | |
| 2944 | 587 return retval; |
| 1 | 588 } |
| 589 | |
| 6979 | 590 static std::string |
| 591 quoting_filename (const std::string &text, int, char quote) | |
| 592 { | |
| 593 if (quote) | |
| 594 return text; | |
| 595 else | |
| 596 return (std::string ("'") + text); | |
| 597 } | |
| 598 | |
| 2927 | 599 void |
| 600 initialize_command_input (void) | |
| 601 { | |
| 602 // If we are using readline, this allows conditional parsing of the | |
| 603 // .inputrc file. | |
| 269 | 604 |
| 2927 | 605 command_editor::set_name ("Octave"); |
| 1358 | 606 |
| 5775 | 607 // FIXME -- this needs to include a comma too, but that |
| 3933 | 608 // causes trouble for the new struct element completion code. |
| 609 | |
| 4272 | 610 static const char *s = "\t\n !\"\'*+-/:;<=>(){}[\\]^`~"; |
| 3933 | 611 |
| 612 command_editor::set_basic_word_break_characters (s); | |
| 613 | |
| 614 command_editor::set_completer_word_break_characters (s); | |
| 615 | |
| 3004 | 616 command_editor::set_basic_quote_characters ("\""); |
| 2944 | 617 |
| 6979 | 618 command_editor::set_filename_quote_characters (" \t\n\\\"'@<>=;|&()#$`?*[!:{"); |
| 619 command_editor::set_completer_quote_characters ("'\""); | |
| 620 | |
| 2944 | 621 command_editor::set_completion_function (generate_completion); |
| 6979 | 622 |
| 623 command_editor::set_quoting_function (quoting_filename); | |
| 269 | 624 } |
| 625 | |
|
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626 static void |
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627 get_debug_input (const std::string& prompt) |
| 269 | 628 { |
|
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629 octave_user_code *caller = octave_call_stack::caller_user_code (); |
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630 std::string nm; |
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631 |
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632 int curr_debug_line = octave_call_stack::current_line (); |
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633 |
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634 bool have_file = false; |
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635 |
|
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636 if (caller) |
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637 { |
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638 nm = caller->fcn_file_name (); |
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639 |
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640 if (nm.empty ()) |
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641 nm = caller->name (); |
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642 else |
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643 have_file = true; |
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644 } |
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645 else |
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646 curr_debug_line = -1; |
| 3180 | 647 |
|
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648 std::ostringstream buf; |
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649 |
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650 if (! nm.empty ()) |
| 3180 | 651 { |
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652 if (Vgud_mode) |
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653 { |
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654 static char ctrl_z = 'Z' & 0x1f; |
| 269 | 655 |
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656 buf << ctrl_z << ctrl_z << nm << ":" << curr_debug_line; |
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657 } |
|
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658 else |
|
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659 { |
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660 // FIXME -- we should come up with a clean way to detect |
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661 // that we are stopped on the no-op command that marks the |
|
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662 // end of a function or script. |
|
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663 |
|
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664 buf << "stopped in " << nm; |
| 1 | 665 |
|
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666 if (curr_debug_line > 0) |
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667 buf << " at line " << curr_debug_line; |
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668 |
|
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669 if (have_file) |
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670 { |
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671 std::string line_buf |
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672 = get_file_line (nm, curr_debug_line); |
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673 |
|
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674 if (! line_buf.empty ()) |
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675 buf << "\n" << curr_debug_line << ": " << line_buf; |
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676 } |
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677 } |
| 3180 | 678 } |
| 679 | |
|
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680 std::string msg = buf.str (); |
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681 |
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682 if (! msg.empty ()) |
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683 std::cerr << msg << std::endl; |
|
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684 |
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685 unwind_protect frame; |
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686 |
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687 frame.protect_var (VPS1); |
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688 VPS1 = prompt; |
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689 |
|
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690 if (stdin_is_tty) |
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691 { |
|
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692 if (! (interactive || forced_interactive) |
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693 || (reading_fcn_file |
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694 || reading_classdef_file |
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695 || reading_script_file |
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696 || get_input_from_eval_string |
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697 || input_from_startup_file |
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698 || input_from_command_line_file)) |
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699 { |
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700 frame.protect_var (forced_interactive); |
|
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701 forced_interactive = true; |
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702 |
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703 frame.protect_var (reading_fcn_file); |
|
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704 reading_fcn_file = false; |
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705 |
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706 frame.protect_var (reading_classdef_file); |
|
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707 reading_classdef_file = false; |
|
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|
708 |
|
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709 frame.protect_var (reading_script_file); |
|
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710 reading_script_file = false; |
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711 |
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712 frame.protect_var (input_from_startup_file); |
|
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713 input_from_startup_file = false; |
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714 |
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715 frame.protect_var (input_from_command_line_file); |
|
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716 input_from_command_line_file = false; |
|
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717 |
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718 frame.protect_var (get_input_from_eval_string); |
|
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719 get_input_from_eval_string = false; |
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720 |
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721 YY_BUFFER_STATE old_buf = current_buffer (); |
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722 YY_BUFFER_STATE new_buf = create_buffer (get_input_from_stdin ()); |
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723 |
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724 // FIXME: are these safe? |
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725 frame.add_fcn (switch_to_buffer, old_buf); |
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726 frame.add_fcn (delete_buffer, new_buf); |
|
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727 |
|
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728 switch_to_buffer (new_buf); |
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729 } |
|
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|
730 |
|
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|
731 while (Vdebugging) |
|
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732 { |
|
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733 reset_error_handler (); |
|
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734 |
|
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|
735 reset_parser (); |
|
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736 |
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737 // Save current value of global_command. |
|
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738 frame.protect_var (global_command); |
|
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|
739 |
|
11258
795c97ace02c
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740 global_command = 0; |
|
795c97ace02c
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741 |
|
9999
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742 // Do this with an unwind-protect cleanup function so that the |
|
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743 // forced variables will be unmarked in the event of an interrupt. |
|
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744 symbol_table::scope_id scope = symbol_table::top_scope (); |
|
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745 frame.add_fcn (symbol_table::unmark_forced_variables, scope); |
|
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746 |
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747 // This is the same as yyparse in parse.y. |
|
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748 int retval = octave_parse (); |
|
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749 |
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750 if (retval == 0 && global_command) |
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751 { |
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752 global_command->accept (*current_evaluator); |
|
7913
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753 |
|
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754 // FIXME -- To avoid a memory leak, global_command should be |
|
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755 // deleted, I think. But doing that here causes trouble if |
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756 // an error occurs while executing a debugging command |
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757 // (dbstep, for example). It's not clear to me why that |
|
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758 // happens. |
|
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759 // |
|
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760 // delete global_command; |
|
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761 // |
|
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762 // global_command = 0; |
|
7903
8018e10d2b87
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|
763 |
|
9999
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764 if (octave_completion_matches_called) |
|
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765 octave_completion_matches_called = false; |
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766 } |
|
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|
767 |
|
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768 // Unmark forced variables. |
|
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769 // Restore previous value of global_command. |
|
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770 frame.run_top (2); |
|
7787
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|
771 |
|
10142
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772 octave_quit (); |
|
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773 } |
|
7787
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774 } |
|
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775 else |
|
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776 warning ("invalid attempt to debug script read from stdin"); |
| 529 | 777 } |
| 778 | |
| 581 | 779 // If the user simply hits return, this will produce an empty matrix. |
| 780 | |
| 2086 | 781 static octave_value_list |
|
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782 get_user_input (const octave_value_list& args, int nargout) |
| 529 | 783 { |
| 3100 | 784 octave_value_list retval; |
| 529 | 785 |
| 786 int nargin = args.length (); | |
| 787 | |
| 788 int read_as_string = 0; | |
| 789 | |
| 712 | 790 if (nargin == 2) |
| 529 | 791 read_as_string++; |
| 792 | |
|
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793 std::string prompt = args(0).string_value (); |
| 4975 | 794 |
|
7787
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795 if (error_state) |
|
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796 { |
|
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|
797 error ("input: unrecognized argument"); |
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798 return retval; |
| 4975 | 799 } |
| 800 | |
| 2095 | 801 flush_octave_stdout (); |
| 529 | 802 |
| 4565 | 803 octave_diary << prompt; |
| 804 | |
|
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805 std::string input_buf = interactive_input (prompt.c_str (), true); |
| 529 | 806 |
|
7459
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807 if (! (error_state || input_buf.empty ())) |
| 529 | 808 { |
| 1799 | 809 if (! input_from_startup_file) |
|
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810 command_history::add (input_buf); |
| 529 | 811 |
| 2927 | 812 size_t len = input_buf.length (); |
| 529 | 813 |
| 4565 | 814 octave_diary << input_buf; |
| 815 | |
| 816 if (input_buf[len - 1] != '\n') | |
|
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817 octave_diary << "\n"; |
| 4565 | 818 |
| 529 | 819 if (len < 1) |
|
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820 return read_as_string ? octave_value ("") : octave_value (Matrix ()); |
| 3772 | 821 |
| 822 if (read_as_string) | |
|
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823 { |
|
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824 // FIXME -- fix gnu_readline and octave_gets instead! |
|
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825 if (input_buf.length () == 1 && input_buf[0] == '\n') |
|
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826 retval(0) = ""; |
|
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827 else |
|
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|
828 retval(0) = input_buf; |
|
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829 } |
| 529 | 830 else |
|
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831 { |
|
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832 int parse_status = 0; |
| 2900 | 833 |
|
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834 retval = eval_string (input_buf, true, parse_status, nargout); |
| 3100 | 835 |
|
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836 if (! Vdebugging && retval.length () == 0) |
|
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837 retval(0) = Matrix (); |
|
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|
838 } |
| 529 | 839 } |
| 840 else | |
| 841 error ("input: reading user-input failed!"); | |
| 842 | |
| 843 return retval; | |
| 844 } | |
| 845 | |
| 3100 | 846 DEFUN (input, args, nargout, |
| 3372 | 847 "-*- texinfo -*-\n\ |
| 10840 | 848 @deftypefn {Built-in Function} {} input (@var{prompt})\n\ |
| 3372 | 849 @deftypefnx {Built-in Function} {} input (@var{prompt}, \"s\")\n\ |
| 850 Print a prompt and wait for user input. For example,\n\ | |
| 851 \n\ | |
| 852 @example\n\ | |
| 853 input (\"Pick a number, any number! \")\n\ | |
| 854 @end example\n\ | |
| 855 \n\ | |
| 856 @noindent\n\ | |
| 857 prints the prompt\n\ | |
| 858 \n\ | |
| 859 @example\n\ | |
| 860 Pick a number, any number!\n\ | |
| 861 @end example\n\ | |
| 529 | 862 \n\ |
| 3372 | 863 @noindent\n\ |
| 864 and waits for the user to enter a value. The string entered by the user\n\ | |
| 865 is evaluated as an expression, so it may be a literal constant, a\n\ | |
| 866 variable name, or any other valid expression.\n\ | |
| 867 \n\ | |
| 868 Currently, @code{input} only returns one value, regardless of the number\n\ | |
| 869 of values produced by the evaluation of the expression.\n\ | |
| 870 \n\ | |
| 871 If you are only interested in getting a literal string value, you can\n\ | |
| 872 call @code{input} with the character string @code{\"s\"} as the second\n\ | |
| 873 argument. This tells Octave to return the string entered by the user\n\ | |
| 874 directly, without evaluating it first.\n\ | |
| 875 \n\ | |
| 876 Because there may be output waiting to be displayed by the pager, it is\n\ | |
| 877 a good idea to always call @code{fflush (stdout)} before calling\n\ | |
| 878 @code{input}. This will ensure that all pending output is written to\n\ | |
| 879 the screen before your prompt. @xref{Input and Output}.\n\ | |
| 880 @end deftypefn") | |
| 529 | 881 { |
| 2086 | 882 octave_value_list retval; |
| 529 | 883 |
| 884 int nargin = args.length (); | |
| 885 | |
| 712 | 886 if (nargin == 1 || nargin == 2) |
|
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887 retval = get_user_input (args, nargout); |
| 529 | 888 else |
| 5823 | 889 print_usage (); |
| 529 | 890 |
| 891 return retval; | |
| 892 } | |
| 893 | |
| 5640 | 894 bool |
| 895 octave_yes_or_no (const std::string& prompt) | |
| 896 { | |
| 897 std::string prompt_string = prompt + "(yes or no) "; | |
| 898 | |
| 899 while (1) | |
| 900 { | |
|
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901 std::string input_buf = interactive_input (prompt_string, true); |
| 5640 | 902 |
| 903 if (input_buf == "yes") | |
|
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904 return true; |
| 5640 | 905 else if (input_buf == "no") |
|
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906 return false; |
| 5640 | 907 else |
|
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908 message (0, "Please answer yes or no."); |
| 5640 | 909 } |
| 910 } | |
| 911 | |
| 912 DEFUN (yes_or_no, args, , | |
| 913 "-*- texinfo -*-\n\ | |
| 914 @deftypefn {Built-in Function} {} yes_or_no (@var{prompt})\n\ | |
| 915 Ask the user a yes-or-no question. Return 1 if the answer is yes.\n\ | |
| 916 Takes one argument, which is the string to display to ask the\n\ | |
| 917 question. It should end in a space; @samp{yes-or-no-p} adds\n\ | |
| 918 @samp{(yes or no) } to it. The user must confirm the answer with\n\ | |
| 919 RET and can edit it until it has been confirmed.\n\ | |
| 920 @end deftypefn") | |
| 921 { | |
| 922 octave_value retval; | |
| 923 | |
| 924 int nargin = args.length (); | |
| 925 | |
| 926 if (nargin == 0 || nargin == 1) | |
| 927 { | |
| 928 std::string prompt; | |
| 929 | |
| 930 if (nargin == 1) | |
|
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931 { |
|
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|
932 prompt = args(0).string_value (); |
| 5640 | 933 |
|
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934 if (error_state) |
|
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935 { |
|
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|
936 error ("yes_or_no: expecting argument to be character string"); |
|
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937 return retval; |
|
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938 } |
|
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939 } |
| 5640 | 940 |
| 941 retval = octave_yes_or_no (prompt); | |
| 942 } | |
| 943 else | |
| 5823 | 944 print_usage (); |
| 5640 | 945 |
| 946 return retval; | |
| 947 } | |
| 948 | |
| 3707 | 949 octave_value |
| 950 do_keyboard (const octave_value_list& args) | |
| 951 { | |
| 952 octave_value retval; | |
| 953 | |
| 954 int nargin = args.length (); | |
| 955 | |
| 956 assert (nargin == 0 || nargin == 1); | |
| 957 | |
|
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958 unwind_protect frame; |
| 3707 | 959 |
| 5775 | 960 // FIXME -- we shouldn't need both the |
| 3707 | 961 // command_history object and the |
| 962 // Vsaving_history variable... | |
| 963 command_history::ignore_entries (false); | |
| 964 | |
|
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965 frame.add_fcn (command_history::ignore_entries, ! Vsaving_history); |
| 3707 | 966 |
|
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967 frame.protect_var (Vsaving_history); |
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968 frame.protect_var (Vdebugging); |
|
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969 |
|
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970 frame.add_fcn (octave_call_stack::restore_frame, |
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971 octave_call_stack::current_frame ()); |
| 3707 | 972 |
|
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973 // FIXME -- probably we just want to print one line, not the |
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974 // entire statement, which might span many lines... |
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975 // |
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976 // tree_print_code tpc (octave_stdout); |
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977 // stmt.accept (tpc); |
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978 |
| 3707 | 979 Vsaving_history = true; |
|
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980 Vdebugging = true; |
| 3707 | 981 |
|
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982 std::string prompt = "debug> "; |
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983 if (nargin > 0) |
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984 prompt = args(0).string_value (); |
| 4233 | 985 |
|
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986 if (! error_state) |
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987 get_debug_input (prompt); |
| 3707 | 988 |
| 989 return retval; | |
| 990 } | |
| 991 | |
| 1957 | 992 DEFUN (keyboard, args, , |
| 3372 | 993 "-*- texinfo -*-\n\ |
|
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994 @deftypefn {Built-in Function} {} keyboard ()\n\ |
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995 @deftypefnx {Built-in Function} {} keyboard (@var{prompt})\n\ |
| 3372 | 996 This function is normally used for simple debugging. When the\n\ |
| 997 @code{keyboard} function is executed, Octave prints a prompt and waits\n\ | |
| 998 for user input. The input strings are then evaluated and the results\n\ | |
| 999 are printed. This makes it possible to examine the values of variables\n\ | |
|
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1000 within a function, and to assign new values if necessary. To leave the\n\ |
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1001 prompt and return to normal execution type @samp{return} or @samp{dbcont}.\n\ |
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1002 The @code{keyboard} function does not return an exit status.\n\ |
| 529 | 1003 \n\ |
|
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1004 If @code{keyboard} is invoked without arguments, a default prompt of\n\ |
| 3372 | 1005 @samp{debug> } is used.\n\ |
|
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1006 @seealso{dbcont, dbquit}\n\ |
| 3372 | 1007 @end deftypefn") |
| 529 | 1008 { |
| 2086 | 1009 octave_value_list retval; |
| 529 | 1010 |
| 1011 int nargin = args.length (); | |
| 1012 | |
| 712 | 1013 if (nargin == 0 || nargin == 1) |
|
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1014 { |
|
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1015 unwind_protect frame; |
|
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1016 |
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1017 frame.add_fcn (octave_call_stack::restore_frame, |
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1018 octave_call_stack::current_frame ()); |
|
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1019 |
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1020 // Skip the frame assigned to the keyboard function. |
|
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1021 octave_call_stack::goto_frame_relative (0); |
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1022 |
|
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1023 tree_evaluator::debug_mode = true; |
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1024 |
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1025 tree_evaluator::current_frame = octave_call_stack::current_frame (); |
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1026 |
|
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1027 do_keyboard (args); |
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1028 } |
| 529 | 1029 else |
| 5823 | 1030 print_usage (); |
| 529 | 1031 |
| 1032 return retval; | |
| 1033 } | |
| 1034 | |
|
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1035 DEFUN (echo, args, , |
| 3332 | 1036 "-*- texinfo -*-\n\ |
| 1037 @deffn {Command} echo options\n\ | |
| 1038 Control whether commands are displayed as they are executed. Valid\n\ | |
| 1039 options are:\n\ | |
| 1588 | 1040 \n\ |
| 3332 | 1041 @table @code\n\ |
| 1042 @item on\n\ | |
| 1043 Enable echoing of commands as they are executed in script files.\n\ | |
| 1044 \n\ | |
| 1045 @item off\n\ | |
| 1046 Disable echoing of commands as they are executed in script files.\n\ | |
| 1588 | 1047 \n\ |
| 3332 | 1048 @item on all\n\ |
| 1049 Enable echoing of commands as they are executed in script files and\n\ | |
| 1050 functions.\n\ | |
| 1588 | 1051 \n\ |
| 3332 | 1052 @item off all\n\ |
| 1053 Disable echoing of commands as they are executed in script files and\n\ | |
| 1054 functions.\n\ | |
| 1055 @end table\n\ | |
| 1056 \n\ | |
| 1057 @noindent\n\ | |
|
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1058 With no arguments, @code{echo} toggles the current echo state.\n\ |
| 3333 | 1059 @end deffn") |
| 1588 | 1060 { |
| 2086 | 1061 octave_value_list retval; |
| 1588 | 1062 |
| 1755 | 1063 int argc = args.length () + 1; |
| 1064 | |
| 1968 | 1065 string_vector argv = args.make_argv ("echo"); |
| 1755 | 1066 |
| 1067 if (error_state) | |
| 1068 return retval; | |
| 1588 | 1069 |
| 1070 switch (argc) | |
| 1071 { | |
| 1072 case 1: | |
| 1073 { | |
|
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1074 if ((Vecho_executing_commands & ECHO_SCRIPTS) |
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1075 || (Vecho_executing_commands & ECHO_FUNCTIONS)) |
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1076 Vecho_executing_commands = ECHO_OFF; |
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1077 else |
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1078 Vecho_executing_commands = ECHO_SCRIPTS; |
| 1588 | 1079 } |
| 1080 break; | |
| 1081 | |
| 1082 case 2: | |
| 1083 { | |
|
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1084 std::string arg = argv[1]; |
| 1755 | 1085 |
|
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1086 if (arg == "on") |
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1087 Vecho_executing_commands = ECHO_SCRIPTS; |
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1088 else if (arg == "off") |
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1089 Vecho_executing_commands = ECHO_OFF; |
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1090 else |
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1091 print_usage (); |
| 1588 | 1092 } |
| 1093 break; | |
| 1094 | |
| 1095 case 3: | |
| 1096 { | |
|
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1097 std::string arg = argv[1]; |
| 1755 | 1098 |
|
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1099 if (arg == "on" && argv[2] == "all") |
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1100 { |
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1101 int tmp = (ECHO_SCRIPTS | ECHO_FUNCTIONS); |
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1102 Vecho_executing_commands = tmp; |
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1103 } |
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1104 else if (arg == "off" && argv[2] == "all") |
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1105 Vecho_executing_commands = ECHO_OFF; |
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1106 else |
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1107 print_usage (); |
| 1588 | 1108 } |
| 1109 break; | |
| 1110 | |
| 1111 default: | |
| 5823 | 1112 print_usage (); |
| 1588 | 1113 break; |
| 1114 } | |
| 1115 | |
| 1116 return retval; | |
| 1117 } | |
| 1118 | |
| 2234 | 1119 DEFUN (completion_matches, args, nargout, |
| 3332 | 1120 "-*- texinfo -*-\n\ |
| 1121 @deftypefn {Built-in Function} {} completion_matches (@var{hint})\n\ | |
| 1122 Generate possible completions given @var{hint}.\n\ | |
| 2299 | 1123 \n\ |
| 1124 This function is provided for the benefit of programs like Emacs which\n\ | |
| 3332 | 1125 might be controlling Octave and handling user input. The current\n\ |
| 1126 command number is not incremented when this function is called. This is\n\ | |
| 1127 a feature, not a bug.\n\ | |
| 3333 | 1128 @end deftypefn") |
| 2234 | 1129 { |
| 2281 | 1130 octave_value retval; |
| 2234 | 1131 |
| 1132 int nargin = args.length (); | |
| 1133 | |
| 1134 if (nargin == 1) | |
| 1135 { | |
| 3523 | 1136 std::string hint = args(0).string_value (); |
| 2234 | 1137 |
| 1138 if (! error_state) | |
|
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1139 { |
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1140 int n = 32; |
| 2234 | 1141 |
|
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1142 string_vector list (n); |
| 2234 | 1143 |
|
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1144 int k = 0; |
| 2234 | 1145 |
|
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1146 for (;;) |
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1147 { |
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1148 std::string cmd = generate_completion (hint, k); |
| 2234 | 1149 |
|
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1150 if (! cmd.empty ()) |
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1151 { |
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1152 if (k == n) |
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1153 { |
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1154 n *= 2; |
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1155 list.resize (n); |
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1156 } |
| 2235 | 1157 |
|
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1158 list[k++] = cmd; |
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1159 } |
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1160 else |
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1161 { |
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1162 list.resize (k); |
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1163 break; |
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1164 } |
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1165 } |
| 2234 | 1166 |
|
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1167 if (nargout > 0) |
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1168 { |
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1169 if (! list.empty ()) |
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1170 retval = list; |
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1171 else |
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1172 retval = ""; |
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1173 } |
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1174 else |
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1175 { |
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1176 // We don't use string_vector::list_in_columns here |
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1177 // because it will be easier for Emacs if the names |
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1178 // appear in a single column. |
| 2235 | 1179 |
|
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1180 int len = list.length (); |
| 2234 | 1181 |
|
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1182 for (int i = 0; i < len; i++) |
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1183 octave_stdout << list[i] << "\n"; |
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1184 } |
| 2299 | 1185 |
|
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1186 octave_completion_matches_called = true; |
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1187 } |
| 2234 | 1188 } |
| 1189 else | |
| 5823 | 1190 print_usage (); |
| 2234 | 1191 |
| 1192 return retval; | |
| 1193 } | |
| 1194 | |
| 3189 | 1195 DEFUN (read_readline_init_file, args, , |
| 3448 | 1196 "-*- texinfo -*-\n\ |
| 1197 @deftypefn {Built-in Function} {} read_readline_init_file (@var{file})\n\ | |
| 7007 | 1198 Read the readline library initialization file @var{file}. If\n\ |
| 3448 | 1199 @var{file} is omitted, read the default initialization file (normally\n\ |
| 6615 | 1200 @file{~/.inputrc}).\n\ |
| 1201 \n\ | |
| 1202 @xref{Readline Init File, , , readline, GNU Readline Library},\n\ | |
| 1203 for details.\n\ | |
| 3448 | 1204 @end deftypefn") |
| 3189 | 1205 { |
| 1206 octave_value_list retval; | |
| 1207 | |
| 1208 int nargin = args.length (); | |
| 1209 | |
| 1210 if (nargin == 0) | |
| 1211 command_editor::read_init_file (); | |
| 1212 else if (nargin == 1) | |
| 1213 { | |
| 5872 | 1214 std::string file = args(0).string_value (); |
| 3189 | 1215 |
| 1216 if (! error_state) | |
|
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1217 command_editor::read_init_file (file); |
| 3189 | 1218 } |
| 1219 else | |
| 5823 | 1220 print_usage (); |
| 3189 | 1221 |
| 1222 return retval; | |
| 1223 } | |
| 1224 | |
|
7758
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1225 DEFUN (re_read_readline_init_file, args, , |
|
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1226 "-*- texinfo -*-\n\ |
|
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1227 @deftypefn {Built-in Function} {} re_read_readline_init_file ()\n\ |
|
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1228 Re-read the last readline library initialization file that was read.\n\ |
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1229 @xref{Readline Init File, , , readline, GNU Readline Library},\n\ |
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1230 for details.\n\ |
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1231 @end deftypefn") |
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1232 { |
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1233 octave_value_list retval; |
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1234 |
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1235 if (args.length () == 0) |
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1236 command_editor::re_read_init_file (); |
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1237 else |
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1238 print_usage (); |
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1239 |
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1240 return retval; |
|
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1241 } |
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1242 |
|
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1243 typedef std::map<std::string, octave_value> hook_fcn_map_type; |
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1244 |
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1245 static hook_fcn_map_type hook_fcn_map; |
| 3498 | 1246 |
| 4802 | 1247 static int |
| 3519 | 1248 input_event_hook (void) |
| 3498 | 1249 { |
|
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1250 if (! lexer_flags.defining_func) |
| 4526 | 1251 { |
|
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1252 hook_fcn_map_type::iterator p = hook_fcn_map.begin (); |
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1253 |
|
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1254 while (p != hook_fcn_map.end ()) |
|
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1255 { |
|
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1256 std::string hook_fcn = p->first; |
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1257 octave_value user_data = p->second; |
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1258 |
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1259 p++; |
|
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1260 |
|
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1261 if (is_valid_function (hook_fcn)) |
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1262 { |
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1263 if (user_data.is_defined ()) |
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1264 feval (hook_fcn, user_data, 0); |
|
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1265 else |
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1266 feval (hook_fcn, octave_value_list (), 0); |
|
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1267 } |
|
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1268 else |
|
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1269 hook_fcn_map.erase (p); |
|
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1270 } |
|
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1271 |
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1272 if (hook_fcn_map.empty ()) |
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1273 command_editor::remove_event_hook (input_event_hook); |
| 4526 | 1274 } |
| 1275 | |
| 4802 | 1276 return 0; |
| 3498 | 1277 } |
| 1278 | |
|
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1279 DEFUN (add_input_event_hook, args, , |
| 3498 | 1280 "-*- texinfo -*-\n\ |
|
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1281 @deftypefn {Built-in Function} {} add_input_event_hook (@var{fcn}, @var{data})\n\ |
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1282 Add the named function @var{fcn} to the list of functions to call\n\ |
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1283 periodically when Octave is waiting for input. The function should\n\ |
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1284 have the form\n\ |
| 10840 | 1285 \n\ |
| 3498 | 1286 @example\n\ |
| 1287 @var{fcn} (@var{data})\n\ | |
| 1288 @end example\n\ | |
| 1289 \n\ | |
| 1290 If @var{data} is omitted, Octave calls the function without any\n\ | |
|
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1291 arguments.\n\ |
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1292 @seealso{remove_input_event_hook}\n\ |
| 3498 | 1293 @end deftypefn") |
| 1294 { | |
| 1295 octave_value_list retval; | |
| 1296 | |
| 1297 int nargin = args.length (); | |
| 1298 | |
|
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1299 if (nargin == 1 || nargin == 2) |
| 3498 | 1300 { |
|
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1301 octave_value user_data; |
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1302 |
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1303 if (nargin == 2) |
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1304 user_data = args(1); |
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1305 |
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1306 std::string hook_fcn = args(0).string_value (); |
| 3498 | 1307 |
|
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1308 if (! error_state) |
|
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1309 { |
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1310 if (hook_fcn_map.empty ()) |
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1311 command_editor::add_event_hook (input_event_hook); |
| 3498 | 1312 |
|
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1313 hook_fcn_map[hook_fcn] = user_data; |
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1314 } |
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1315 else |
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1316 error ("add_input_event_hook: expecting string as first arg"); |
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1317 } |
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1318 else |
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1319 print_usage (); |
| 3498 | 1320 |
|
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1321 return retval; |
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1322 } |
| 3498 | 1323 |
|
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1324 DEFUN (remove_input_event_hook, args, , |
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1325 "-*- texinfo -*-\n\ |
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1326 @deftypefn {Built-in Function} {} remove_input_event_hook (@var{fcn})\n\ |
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1327 Remove the named function @var{fcn} to the list of functions to call\n\ |
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1328 periodically when Octave is waiting for input.\n\ |
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1329 @seealso{add_input_event_hook}\n\ |
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1330 @end deftypefn") |
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1331 { |
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1332 octave_value_list retval; |
| 3498 | 1333 |
|
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1334 int nargin = args.length (); |
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1335 |
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1336 if (nargin == 1) |
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1337 { |
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1338 std::string hook_fcn = args(0).string_value (); |
| 3498 | 1339 |
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1340 if (! error_state) |
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1341 { |
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1342 hook_fcn_map_type::iterator p = hook_fcn_map.find (hook_fcn); |
| 3498 | 1343 |
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1344 if (p != hook_fcn_map.end ()) |
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1345 hook_fcn_map.erase (p); |
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1346 else |
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1347 error ("remove_input_event_hook: %s not found in list", |
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1348 hook_fcn.c_str ()); |
| 3498 | 1349 |
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1350 if (hook_fcn_map.empty ()) |
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1351 command_editor::remove_event_hook (input_event_hook); |
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1352 } |
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1353 else |
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1354 error ("remove_input_event_hook: expecting string as first arg"); |
| 3498 | 1355 } |
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1356 else |
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1357 print_usage (); |
| 3498 | 1358 |
| 1359 return retval; | |
| 1360 } | |
| 1361 | |
| 5794 | 1362 DEFUN (PS1, args, nargout, |
| 1363 "-*- texinfo -*-\n\ | |
| 10840 | 1364 @deftypefn {Built-in Function} {@var{val} =} PS1 ()\n\ |
| 5794 | 1365 @deftypefnx {Built-in Function} {@var{old_val} =} PS1 (@var{new_val})\n\ |
| 1366 Query or set the primary prompt string. When executing interactively,\n\ | |
| 1367 Octave displays the primary prompt when it is ready to read a command.\n\ | |
| 3332 | 1368 \n\ |
| 5794 | 1369 The default value of the primary prompt string is @code{\"\\s:\\#> \"}.\n\ |
| 1370 To change it, use a command like\n\ | |
| 3332 | 1371 \n\ |
| 1372 @example\n\ | |
|
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1373 PS1 (\"\\\\u@@\\\\H> \")\n\ |
| 3332 | 1374 @end example\n\ |
| 1375 \n\ | |
| 1376 @noindent\n\ | |
| 1377 which will result in the prompt @samp{boris@@kremvax> } for the user\n\ | |
| 1378 @samp{boris} logged in on the host @samp{kremvax.kgb.su}. Note that two\n\ | |
| 5794 | 1379 backslashes are required to enter a backslash into a double-quoted\n\ |
|
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1380 character string. @xref{Strings}.\n\ |
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1381 \n\ |
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1382 You can also use ANSI escape sequences if your terminal supports them.\n\ |
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1383 This can be useful for colouring the prompt. For example,\n\ |
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1384 \n\ |
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1385 @example\n\ |
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1386 PS1 (\"\\\\[\\\\033[01;31m\\\\]\\\\s:\\\\#> \\\\[\\\\033[0m\\]\")\n\ |
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1387 @end example\n\ |
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1388 \n\ |
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1389 will give the default Octave prompt a red colouring.\n\ |
| 6373 | 1390 @seealso{PS2, PS4}\n\ |
| 5794 | 1391 @end deftypefn") |
| 1392 { | |
| 1393 return SET_INTERNAL_VARIABLE (PS1); | |
| 1394 } | |
| 2181 | 1395 |
| 5794 | 1396 DEFUN (PS2, args, nargout, |
| 1397 "-*- texinfo -*-\n\ | |
| 10840 | 1398 @deftypefn {Built-in Function} {@var{val} =} PS2 ()\n\ |
| 5794 | 1399 @deftypefnx {Built-in Function} {@var{old_val} =} PS2 (@var{new_val})\n\ |
| 1400 Query or set the secondary prompt string. The secondary prompt is\n\ | |
| 1401 printed when Octave is expecting additional input to complete a\n\ | |
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1402 command. For example, if you are typing a @code{for} loop that spans several\n\ |
| 5794 | 1403 lines, Octave will print the secondary prompt at the beginning of\n\ |
| 1404 each line after the first. The default value of the secondary prompt\n\ | |
| 1405 string is @code{\"> \"}.\n\ | |
| 1406 @seealso{PS1, PS4}\n\ | |
| 1407 @end deftypefn") | |
| 1408 { | |
| 1409 return SET_INTERNAL_VARIABLE (PS2); | |
| 1410 } | |
| 2181 | 1411 |
| 5794 | 1412 DEFUN (PS4, args, nargout, |
| 1413 "-*- texinfo -*-\n\ | |
| 10840 | 1414 @deftypefn {Built-in Function} {@var{val} =} PS4 ()\n\ |
| 5794 | 1415 @deftypefnx {Built-in Function} {@var{old_val} =} PS4 (@var{new_val})\n\ |
| 1416 Query or set the character string used to prefix output produced\n\ | |
|
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1417 when echoing commands is enabled.\n\ |
| 6620 | 1418 The default value is @code{\"+ \"}.\n\ |
|
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1419 @xref{Diary and Echo Commands}, for a description of echoing commands.\n\ |
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1420 @seealso{echo, echo_executing_commands, PS1, PS2}\n\ |
| 5794 | 1421 @end deftypefn") |
| 1422 { | |
| 1423 return SET_INTERNAL_VARIABLE (PS4); | |
| 1424 } | |
| 2181 | 1425 |
| 5794 | 1426 DEFUN (completion_append_char, args, nargout, |
| 1427 "-*- texinfo -*-\n\ | |
| 10840 | 1428 @deftypefn {Built-in Function} {@var{val} =} completion_append_char ()\n\ |
| 5794 | 1429 @deftypefnx {Built-in Function} {@var{old_val} =} completion_append_char (@var{new_val})\n\ |
| 1430 Query or set the internal character variable that is appended to\n\ | |
| 1431 successful command-line completion attempts. The default\n\ | |
| 3332 | 1432 value is @code{\" \"} (a single space).\n\ |
| 5794 | 1433 @end deftypefn") |
| 1434 { | |
| 1435 return SET_INTERNAL_VARIABLE (completion_append_char); | |
| 1436 } | |
| 3019 | 1437 |
| 5794 | 1438 DEFUN (echo_executing_commands, args, nargout, |
| 1439 "-*- texinfo -*-\n\ | |
| 10840 | 1440 @deftypefn {Built-in Function} {@var{val} =} echo_executing_commands ()\n\ |
| 5794 | 1441 @deftypefnx {Built-in Function} {@var{old_val} =} echo_executing_commands (@var{new_val})\n\ |
| 1442 Query or set the internal variable that controls the echo state.\n\ | |
| 1443 It may be the sum of the following values:\n\ | |
| 3332 | 1444 \n\ |
| 1445 @table @asis\n\ | |
| 1446 @item 1\n\ | |
| 1447 Echo commands read from script files.\n\ | |
| 1448 \n\ | |
| 1449 @item 2\n\ | |
| 1450 Echo commands from functions.\n\ | |
| 1451 \n\ | |
| 1452 @item 4\n\ | |
| 1453 Echo commands read from command line.\n\ | |
| 1454 @end table\n\ | |
| 1455 \n\ | |
| 1456 More than one state can be active at once. For example, a value of 3 is\n\ | |
| 1457 equivalent to the command @kbd{echo on all}.\n\ | |
| 1458 \n\ | |
|
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1459 The value of @code{echo_executing_commands} may be set by the @kbd{echo}\n\ |
| 10840 | 1460 command or the command line option @option{--echo-commands}.\n\ |
| 5794 | 1461 @end deftypefn") |
| 1462 { | |
| 1463 return SET_INTERNAL_VARIABLE (echo_executing_commands); | |
| 2181 | 1464 } |
| 1465 | |
| 6257 | 1466 DEFUN (__request_drawnow__, args, , |
| 1467 "-*- texinfo -*-\n\ | |
| 10840 | 1468 @deftypefn {Built-in Function} {} __request_drawnow__ ()\n\ |
| 6257 | 1469 @deftypefnx {Built-in Function} {} __request_drawnow__ (@var{flag})\n\ |
| 6945 | 1470 Undocumented internal function.\n\ |
| 6257 | 1471 @end deftypefn") |
| 1472 { | |
| 1473 octave_value retval; | |
| 1474 | |
| 1475 int nargin = args.length (); | |
| 1476 | |
| 1477 if (nargin == 0) | |
| 1478 Vdrawnow_requested = true; | |
| 1479 else if (nargin == 1) | |
| 1480 Vdrawnow_requested = args(0).bool_value (); | |
| 1481 else | |
| 1482 print_usage (); | |
| 1483 | |
| 1484 return retval; | |
| 1485 } | |
| 1486 | |
| 7294 | 1487 DEFUN (__gud_mode__, args, , |
| 1488 "-*- texinfo -*-\n\ | |
| 1489 @deftypefn {Built-in Function} {} __gud_mode__ ()\n\ | |
| 1490 Undocumented internal function.\n\ | |
| 1491 @end deftypefn") | |
| 1492 { | |
| 1493 octave_value retval; | |
| 1494 | |
| 1495 int nargin = args.length (); | |
| 1496 | |
| 1497 if (nargin == 0) | |
| 1498 retval = Vgud_mode; | |
| 1499 else if (nargin == 1) | |
| 1500 Vgud_mode = args(0).bool_value (); | |
| 1501 else | |
| 1502 print_usage (); | |
| 1503 | |
| 1504 return retval; | |
| 1505 } | |
| 1506 | |
|
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1507 DEFUN (filemarker, args, nargout, |
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1508 "-*- texinfo -*-\n\ |
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1509 @deftypefn {Built-in Function} {} filemarker ()\n\ |
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1510 Returns or sets the character used to separate filename from the\n\ |
|
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1511 the subfunction names contained within the file. This can be used in\n\ |
| 10840 | 1512 a generic manner to interact with subfunctions. For example,\n\ |
|
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1513 \n\ |
|
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1514 @example\n\ |
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1515 help ([\"myfunc\", filemarker, \"mysubfunc\"])\n\ |
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1516 @end example\n\ |
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1517 \n\ |
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1518 @noindent\n\ |
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1519 returns the help string associated with the sub-function @code{mysubfunc}\n\ |
|
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1520 of the function @code{myfunc}. Another use of @code{filemarker} is when\n\ |
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1521 debugging it allows easier placement of breakpoints within sub-functions.\n\ |
| 10840 | 1522 For example,\n\ |
|
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1523 \n\ |
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1524 @example\n\ |
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1525 dbstop ([\"myfunc\", filemarker, \"mysubfunc\"])\n\ |
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1526 @end example\n\ |
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1527 \n\ |
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1528 @noindent\n\ |
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1529 will set a breakpoint at the first line of the subfunction @code{mysubfunc}.\n\ |
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1530 @end deftypefn") |
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1531 { |
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1532 char tmp = Vfilemarker; |
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1533 octave_value retval = SET_INTERNAL_VARIABLE (filemarker); |
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1534 |
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1535 // The character passed must not be a legal character for a function name |
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1536 if (! error_state && (::isalnum (Vfilemarker) || Vfilemarker == '_')) |
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1537 { |
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1538 Vfilemarker = tmp; |
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1539 error ("filemarker: character can not be a valid character for a function name"); |
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1540 } |
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1541 |
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1542 return retval; |
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1543 } |