Mercurial > hg > octave-lyh
annotate src/input.cc @ 8746:5dd06f19e9be
handle commands in the lexer
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Sun, 15 Feb 2009 23:49:15 -0500 |
| parents | 73c4516fae10 |
| children | 5a7494ee68a3 |
| rev | line source |
|---|---|
| 1 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 4 2002, 2003, 2004, 2005, 2006, 2007 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 | |
| 1343 | 30 #include <cstdio> |
| 31 #include <cstdlib> | |
| 32 #include <cstring> | |
| 33 #include <cassert> | |
| 34 | |
| 3503 | 35 #include <iostream> |
| 5765 | 36 #include <sstream> |
| 1728 | 37 #include <string> |
| 38 | |
| 1350 | 39 #ifdef HAVE_UNISTD_H |
| 2442 | 40 #ifdef HAVE_SYS_TYPES_H |
| 529 | 41 #include <sys/types.h> |
| 2442 | 42 #endif |
| 529 | 43 #include <unistd.h> |
| 44 #endif | |
| 1343 | 45 |
| 2927 | 46 #include "cmd-edit.h" |
| 3189 | 47 #include "file-ops.h" |
| 4153 | 48 #include "quit.h" |
| 1755 | 49 #include "str-vec.h" |
| 50 | |
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51 #include "debug.h" |
| 1352 | 52 #include "defun.h" |
| 53 #include "dirfns.h" | |
| 1 | 54 #include "error.h" |
| 2181 | 55 #include "gripes.h" |
| 3016 | 56 #include "help.h" |
| 1 | 57 #include "input.h" |
| 5832 | 58 #include "load-path.h" |
| 1352 | 59 #include "oct-map.h" |
| 1742 | 60 #include "oct-hist.h" |
| 1670 | 61 #include "toplev.h" |
| 1755 | 62 #include "oct-obj.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" |
| 1114 | 71 #include "sysdep.h" |
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72 #include "toplev.h" |
| 3098 | 73 #include "unwind-prot.h" |
| 1352 | 74 #include "utils.h" |
| 75 #include "variables.h" | |
| 529 | 76 |
| 2181 | 77 // Primary prompt string. |
| 5794 | 78 static std::string VPS1 = "\\s:\\#> "; |
| 2181 | 79 |
| 80 // Secondary prompt string. | |
| 5794 | 81 static std::string VPS2 = "> "; |
| 2181 | 82 |
| 83 // String printed before echoed input (enabled by --echo-input). | |
| 5794 | 84 std::string VPS4 = "+ "; |
| 2181 | 85 |
| 3019 | 86 // Echo commands as they are executed? |
| 87 // | |
| 88 // 1 ==> echo commands read from script files | |
| 89 // 2 ==> echo commands from functions | |
| 90 // 4 ==> echo commands read from command line | |
| 91 // | |
| 92 // more than one state can be active at once. | |
| 5794 | 93 int Vecho_executing_commands = ECHO_OFF; |
| 3019 | 94 |
| 3165 | 95 // The time we last printed a prompt. |
| 5832 | 96 octave_time Vlast_prompt_time = 0.0; |
| 3165 | 97 |
| 2181 | 98 // Character to append after successful command-line completion attempts. |
| 5794 | 99 static char Vcompletion_append_char = ' '; |
| 2181 | 100 |
| 1 | 101 // Global pointer for eval(). |
| 3523 | 102 std::string current_eval_string; |
| 1 | 103 |
| 3019 | 104 // TRUE means get input from current_eval_string. |
| 105 bool get_input_from_eval_string = false; | |
| 1 | 106 |
| 3877 | 107 // TRUE means we haven't been asked for the input from |
| 108 // current_eval_string yet. | |
| 109 bool input_from_eval_string_pending = false; | |
| 110 | |
| 5189 | 111 // TRUE means that input is coming from a file that was named on |
| 112 // the command line. | |
| 113 bool input_from_command_line_file = false; | |
| 114 | |
| 3019 | 115 // TRUE means we're parsing a function file. |
| 116 bool reading_fcn_file = false; | |
| 1 | 117 |
| 338 | 118 // Simple name of function file we are reading. |
| 3523 | 119 std::string curr_fcn_file_name; |
| 1606 | 120 |
| 121 // Full name of file we are reading. | |
| 3523 | 122 std::string curr_fcn_file_full_name; |
| 1 | 123 |
| 3019 | 124 // TRUE means we're parsing a script file. |
| 125 bool reading_script_file = false; | |
| 1 | 126 |
| 127 // If we are reading from an M-file, this is it. | |
| 529 | 128 FILE *ff_instream = 0; |
| 1 | 129 |
| 3019 | 130 // TRUE means this is an interactive shell. |
| 131 bool interactive = false; | |
| 1 | 132 |
| 3019 | 133 // TRUE means the user forced this shell to be interactive (-i). |
| 134 bool forced_interactive = false; | |
| 1 | 135 |
| 136 // Should we issue a prompt? | |
| 137 int promptflag = 1; | |
| 138 | |
| 139 // The current line of input, from wherever. | |
| 3523 | 140 std::string current_input_line; |
| 1 | 141 |
| 3804 | 142 // TRUE after a call to completion_matches. |
| 2299 | 143 bool octave_completion_matches_called = false; |
| 144 | |
| 6257 | 145 // TRUE if the plotting system has requested a call to drawnow at |
| 146 // the next user prompt. | |
| 7409 | 147 bool Vdrawnow_requested = false; |
| 6257 | 148 |
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149 // TRUE if we are in debugging mode. |
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150 bool Vdebugging = false; |
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151 |
| 7294 | 152 // TRUE if we are running in the Emacs GUD mode. |
| 153 static bool Vgud_mode = false; | |
| 154 | |
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155 // The filemarker used to separate filenames from subfunction names |
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156 char Vfilemarker = '>'; |
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157 |
| 1044 | 158 static void |
| 3523 | 159 do_input_echo (const std::string& input_string) |
| 1044 | 160 { |
| 1588 | 161 int do_echo = reading_script_file ? |
| 2205 | 162 (Vecho_executing_commands & ECHO_SCRIPTS) |
| 2618 | 163 : (Vecho_executing_commands & ECHO_CMD_LINE) && ! forced_interactive; |
| 1588 | 164 |
| 165 if (do_echo) | |
| 1044 | 166 { |
| 1403 | 167 if (forced_interactive) |
| 168 { | |
| 1755 | 169 if (promptflag > 0) |
| 5794 | 170 octave_stdout << command_editor::decode_prompt_string (VPS1); |
| 1755 | 171 else |
| 5794 | 172 octave_stdout << command_editor::decode_prompt_string (VPS2); |
| 1403 | 173 } |
| 174 else | |
| 5794 | 175 octave_stdout << command_editor::decode_prompt_string (VPS4); |
| 1044 | 176 |
| 1755 | 177 if (! input_string.empty ()) |
| 1044 | 178 { |
| 2095 | 179 octave_stdout << input_string; |
| 1755 | 180 |
| 181 if (input_string[input_string.length () - 1] != '\n') | |
| 2095 | 182 octave_stdout << "\n"; |
| 1044 | 183 } |
| 184 } | |
| 185 } | |
| 186 | |
| 3536 | 187 std::string |
| 3523 | 188 gnu_readline (const std::string& s, bool force_readline) |
| 1822 | 189 { |
| 5142 | 190 OCTAVE_QUIT; |
| 191 | |
| 3523 | 192 std::string retval; |
| 1822 | 193 |
| 2927 | 194 if (line_editing || force_readline) |
| 1822 | 195 { |
| 3219 | 196 bool eof; |
| 1898 | 197 |
| 3219 | 198 retval = command_editor::readline (s, eof); |
| 199 | |
| 200 if (! eof && retval.empty ()) | |
| 2927 | 201 retval = "\n"; |
| 1822 | 202 } |
| 203 else | |
| 204 { | |
| 2927 | 205 if (! s.empty () && (interactive || forced_interactive)) |
| 2618 | 206 { |
| 2927 | 207 FILE *stream = command_editor::get_output_stream (); |
| 208 | |
| 209 fprintf (stream, s.c_str ()); | |
| 210 fflush (stream); | |
| 2618 | 211 } |
| 1822 | 212 |
| 2927 | 213 FILE *curr_stream = command_editor::get_input_stream (); |
| 214 | |
| 1822 | 215 if (reading_fcn_file || reading_script_file) |
| 216 curr_stream = ff_instream; | |
| 217 | |
| 2927 | 218 retval = octave_fgets (curr_stream); |
| 1822 | 219 } |
| 220 | |
| 221 return retval; | |
| 222 } | |
| 581 | 223 |
| 6257 | 224 static inline std::string |
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225 interactive_input (const std::string& s, bool force_readline = false) |
| 6257 | 226 { |
| 227 Vlast_prompt_time.stamp (); | |
| 228 | |
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229 if (Vdrawnow_requested && (interactive || forced_interactive)) |
| 6257 | 230 { |
| 231 feval ("drawnow"); | |
| 232 | |
| 6367 | 233 flush_octave_stdout (); |
| 234 | |
| 6305 | 235 // We set Vdrawnow_requested to false even if there is an error |
| 236 // in drawnow so that the error doesn't reappear at every prompt. | |
| 237 | |
| 6257 | 238 Vdrawnow_requested = false; |
| 6305 | 239 |
| 240 if (error_state) | |
| 241 return "\n"; | |
| 6257 | 242 } |
| 243 | |
| 244 return gnu_readline (s, force_readline); | |
| 245 } | |
| 246 | |
| 3536 | 247 static std::string |
| 1 | 248 octave_gets (void) |
| 249 { | |
| 5142 | 250 OCTAVE_QUIT; |
| 251 | |
| 3523 | 252 std::string retval; |
| 1 | 253 |
| 1822 | 254 if ((interactive || forced_interactive) |
| 5832 | 255 && (! (reading_fcn_file |
| 256 || reading_script_file | |
| 257 || input_from_startup_file | |
| 258 || input_from_command_line_file))) | |
| 1 | 259 { |
| 5794 | 260 std::string ps = (promptflag > 0) ? VPS1 : VPS2; |
| 1755 | 261 |
| 3523 | 262 std::string prompt = command_editor::decode_prompt_string (ps); |
| 1 | 263 |
| 2618 | 264 pipe_handler_error_count = 0; |
| 265 | |
| 266 flush_octave_stdout (); | |
| 1 | 267 |
| 2095 | 268 octave_diary << prompt; |
| 581 | 269 |
| 6257 | 270 retval = interactive_input (prompt); |
| 5832 | 271 |
| 272 // There is no need to update the load_path cache if there is no | |
| 273 // user input. | |
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274 if (! retval.empty () |
| 8021 | 275 && retval.find_first_not_of (" \t\n\r") != std::string::npos) |
| 5832 | 276 load_path::update (); |
| 1 | 277 } |
| 278 else | |
| 1822 | 279 retval = gnu_readline (""); |
| 1 | 280 |
| 2927 | 281 current_input_line = retval; |
| 1 | 282 |
| 1822 | 283 if (! current_input_line.empty ()) |
| 1 | 284 { |
| 5189 | 285 if (! (input_from_startup_file || input_from_command_line_file)) |
| 2927 | 286 command_history::add (current_input_line); |
| 1 | 287 |
| 3176 | 288 if (! (reading_fcn_file || reading_script_file)) |
| 289 { | |
| 290 octave_diary << current_input_line; | |
| 291 | |
| 292 if (current_input_line[current_input_line.length () - 1] != '\n') | |
| 293 octave_diary << "\n"; | |
| 294 } | |
| 581 | 295 |
| 1822 | 296 do_input_echo (current_input_line); |
| 1 | 297 } |
| 3176 | 298 else if (! (reading_fcn_file || reading_script_file)) |
| 299 octave_diary << "\n"; | |
| 581 | 300 |
| 1822 | 301 return retval; |
| 1 | 302 } |
| 303 | |
| 581 | 304 // Read a line from the input stream. |
| 305 | |
| 3536 | 306 static std::string |
| 1822 | 307 get_user_input (void) |
| 1 | 308 { |
| 5142 | 309 OCTAVE_QUIT; |
| 310 | |
| 3523 | 311 std::string retval; |
| 1 | 312 |
| 313 if (get_input_from_eval_string) | |
| 314 { | |
| 3877 | 315 if (input_from_eval_string_pending) |
| 316 { | |
| 317 input_from_eval_string_pending = false; | |
| 318 | |
| 319 retval = current_eval_string; | |
| 1822 | 320 |
| 3877 | 321 size_t len = retval.length (); |
| 1822 | 322 |
| 6206 | 323 if (len > 0 && retval[len-1] != '\n') |
| 3877 | 324 retval.append ("\n"); |
| 325 } | |
| 1822 | 326 } |
| 327 else | |
| 328 retval = octave_gets (); | |
| 329 | |
| 2927 | 330 current_input_line = retval; |
| 1822 | 331 |
| 332 return retval; | |
| 333 } | |
| 334 | |
| 335 int | |
| 336 octave_read (char *buf, unsigned max_size) | |
| 337 { | |
| 5775 | 338 // FIXME -- is this a safe way to buffer the input? |
| 2927 | 339 |
| 4046 | 340 static const char * const eol = "\n"; |
| 3523 | 341 static std::string input_buf; |
| 2927 | 342 static const char *pos = 0; |
| 343 static size_t chars_left = 0; | |
| 1822 | 344 |
| 345 int status = 0; | |
| 4046 | 346 if (chars_left == 0) |
| 1822 | 347 { |
| 2927 | 348 pos = 0; |
| 349 | |
| 350 input_buf = get_user_input (); | |
| 1822 | 351 |
| 2927 | 352 chars_left = input_buf.length (); |
| 353 | |
| 354 pos = input_buf.c_str (); | |
| 1822 | 355 } |
| 356 | |
| 357 if (chars_left > 0) | |
| 358 { | |
| 4046 | 359 size_t len = max_size > chars_left ? chars_left : max_size; |
| 2927 | 360 assert (len > 0); |
| 361 | |
| 4046 | 362 memcpy (buf, pos, len); |
| 1822 | 363 |
| 4046 | 364 chars_left -= len; |
| 365 pos += len; | |
| 1822 | 366 |
| 4046 | 367 // Make sure input ends with a new line character. |
| 368 if (chars_left == 0 && buf[len-1] != '\n') | |
| 369 { | |
| 370 if (len < max_size) | |
| 371 { | |
| 372 // There is enough room to plug the newline character in | |
| 373 // the buffer. | |
| 374 buf[len++] = '\n'; | |
| 375 } | |
| 376 else | |
| 377 { | |
| 378 // There isn't enough room to plug the newline character | |
| 379 // in the buffer so make sure it is returned on the next | |
| 380 // octave_read call. | |
| 381 pos = eol; | |
| 382 chars_left = 1; | |
| 383 } | |
| 1 | 384 } |
| 1822 | 385 |
| 4046 | 386 status = len; |
| 1 | 387 |
| 1044 | 388 } |
| 1822 | 389 else if (chars_left == 0) |
| 2862 | 390 { |
| 391 status = 0; | |
| 392 } | |
| 1822 | 393 else |
| 394 status = -1; | |
| 1044 | 395 |
| 1 | 396 return status; |
| 397 } | |
| 398 | |
| 581 | 399 // Fix things up so that input can come from file `name', printing a |
| 400 // warning if the file doesn't exist. | |
| 401 | |
| 1 | 402 FILE * |
| 3523 | 403 get_input_from_file (const std::string& name, int warn) |
| 1 | 404 { |
| 529 | 405 FILE *instream = 0; |
| 1 | 406 |
| 1750 | 407 if (name.length () > 0) |
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408 instream = fopen (name.c_str (), "rb"); |
| 1 | 409 |
| 529 | 410 if (! instream && warn) |
| 1750 | 411 warning ("%s: no such file or directory", name.c_str ()); |
| 1 | 412 |
| 338 | 413 if (reading_fcn_file || reading_script_file) |
| 339 | 414 ff_instream = instream; |
| 1 | 415 else |
| 2927 | 416 command_editor::set_input_stream (instream); |
| 1 | 417 |
| 418 return instream; | |
| 419 } | |
| 420 | |
| 581 | 421 // Fix things up so that input can come from the standard input. This |
| 422 // may need to become much more complicated, which is why it's in a | |
| 423 // separate function. | |
| 424 | |
| 1 | 425 FILE * |
| 426 get_input_from_stdin (void) | |
| 427 { | |
| 2927 | 428 command_editor::set_input_stream (stdin); |
| 429 return command_editor::get_input_stream (); | |
| 1 | 430 } |
| 431 | |
| 5775 | 432 // FIXME -- make this generate file names when appropriate. |
| 2921 | 433 |
| 2247 | 434 static string_vector |
| 3523 | 435 generate_possible_completions (const std::string& text, std::string& prefix, |
| 436 std::string& hint) | |
| 1280 | 437 { |
| 2247 | 438 string_vector names; |
| 1280 | 439 |
| 2921 | 440 prefix = ""; |
| 1280 | 441 |
| 4604 | 442 if (looks_like_struct (text)) |
| 1430 | 443 names = generate_struct_completions (text, prefix, hint); |
| 444 else | |
| 2247 | 445 names = make_name_list (); |
| 1280 | 446 |
| 2944 | 447 // Sort and remove duplicates. |
| 2348 | 448 |
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449 names.sort (true); |
| 2348 | 450 |
| 1280 | 451 return names; |
| 452 } | |
| 453 | |
| 3536 | 454 static std::string |
| 3523 | 455 generate_completion (const std::string& text, int state) |
| 1280 | 456 { |
| 3523 | 457 std::string retval; |
| 2944 | 458 |
| 3523 | 459 static std::string prefix; |
| 460 static std::string hint; | |
| 1280 | 461 |
| 2921 | 462 static size_t hint_len = 0; |
| 1280 | 463 |
| 1 | 464 static int list_index = 0; |
| 2921 | 465 static int name_list_len = 0; |
| 4604 | 466 static int name_list_total_len = 0; |
| 2247 | 467 static string_vector name_list; |
| 4604 | 468 static string_vector file_name_list; |
| 1 | 469 |
| 1280 | 470 static int matches = 0; |
| 1 | 471 |
| 472 if (state == 0) | |
| 473 { | |
| 474 list_index = 0; | |
| 475 | |
| 2921 | 476 prefix = ""; |
| 1280 | 477 |
| 2921 | 478 hint = text; |
| 1280 | 479 |
| 480 name_list = generate_possible_completions (text, prefix, hint); | |
| 481 | |
| 2921 | 482 name_list_len = name_list.length (); |
| 483 | |
| 4604 | 484 file_name_list = command_editor::generate_filename_completions (text); |
| 485 | |
| 486 name_list.append (file_name_list); | |
| 487 | |
| 488 name_list_total_len = name_list.length (); | |
| 489 | |
| 2921 | 490 hint_len = hint.length (); |
| 1280 | 491 |
| 492 matches = 0; | |
| 2247 | 493 |
| 2921 | 494 for (int i = 0; i < name_list_len; i++) |
| 3565 | 495 if (hint == name_list[i].substr (0, hint_len)) |
| 2247 | 496 matches++; |
| 1 | 497 } |
| 498 | |
| 4604 | 499 if (name_list_total_len > 0 && matches > 0) |
| 1 | 500 { |
| 4604 | 501 while (list_index < name_list_total_len) |
| 244 | 502 { |
| 3523 | 503 std::string name = name_list[list_index]; |
| 2247 | 504 |
| 1280 | 505 list_index++; |
| 2247 | 506 |
| 3565 | 507 if (hint == name.substr (0, hint_len)) |
| 1280 | 508 { |
| 4604 | 509 if (list_index <= name_list_len && ! prefix.empty ()) |
| 2944 | 510 retval = prefix + "." + name; |
| 511 else | |
| 512 retval = name; | |
| 1280 | 513 |
| 5775 | 514 // FIXME -- looks_like_struct is broken for now, |
| 4179 | 515 // so it always returns false. |
| 516 | |
| 6979 | 517 if (matches == 1 && looks_like_struct (retval)) |
| 4179 | 518 { |
| 519 // Don't append anything, since we don't know | |
| 520 // whether it should be '(' or '.'. | |
| 521 | |
| 522 command_editor::set_completion_append_character ('\0'); | |
| 523 } | |
| 524 else | |
| 525 command_editor::set_completion_append_character | |
| 526 (Vcompletion_append_char); | |
| 1280 | 527 |
| 2944 | 528 break; |
| 1280 | 529 } |
| 244 | 530 } |
| 1 | 531 } |
| 532 | |
| 2944 | 533 return retval; |
| 1 | 534 } |
| 535 | |
| 6979 | 536 static std::string |
| 537 quoting_filename (const std::string &text, int, char quote) | |
| 538 { | |
| 539 if (quote) | |
| 540 return text; | |
| 541 else | |
| 542 return (std::string ("'") + text); | |
| 543 } | |
| 544 | |
| 2927 | 545 void |
| 546 initialize_command_input (void) | |
| 547 { | |
| 548 // If we are using readline, this allows conditional parsing of the | |
| 549 // .inputrc file. | |
| 269 | 550 |
| 2927 | 551 command_editor::set_name ("Octave"); |
| 1358 | 552 |
| 5775 | 553 // FIXME -- this needs to include a comma too, but that |
| 3933 | 554 // causes trouble for the new struct element completion code. |
| 555 | |
| 4272 | 556 static const char *s = "\t\n !\"\'*+-/:;<=>(){}[\\]^`~"; |
| 3933 | 557 |
| 558 command_editor::set_basic_word_break_characters (s); | |
| 559 | |
| 560 command_editor::set_completer_word_break_characters (s); | |
| 561 | |
| 3004 | 562 command_editor::set_basic_quote_characters ("\""); |
| 2944 | 563 |
| 6979 | 564 command_editor::set_filename_quote_characters (" \t\n\\\"'@<>=;|&()#$`?*[!:{"); |
| 565 command_editor::set_completer_quote_characters ("'\""); | |
| 566 | |
| 2944 | 567 command_editor::set_completion_function (generate_completion); |
| 6979 | 568 |
| 569 command_editor::set_quoting_function (quoting_filename); | |
| 269 | 570 } |
| 571 | |
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572 static void |
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573 get_debug_input (const std::string& prompt) |
| 269 | 574 { |
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575 octave_user_code *caller = octave_call_stack::caller_user_code (); |
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576 std::string nm; |
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577 |
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578 int curr_debug_line = tree_evaluator::debug_line (); |
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579 |
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580 bool have_file = false; |
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581 |
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582 if (caller) |
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583 { |
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584 nm = caller->fcn_file_name (); |
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585 |
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586 if (nm.empty ()) |
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587 nm = caller->name (); |
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588 else |
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589 have_file = true; |
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590 } |
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591 else |
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592 curr_debug_line = -1; |
| 3180 | 593 |
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594 std::ostringstream buf; |
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595 |
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596 if (! nm.empty ()) |
| 3180 | 597 { |
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598 if (Vgud_mode) |
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599 { |
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600 static char ctrl_z = 'Z' & 0x1f; |
| 269 | 601 |
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602 buf << ctrl_z << ctrl_z << nm << ":" << curr_debug_line; |
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603 } |
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604 else |
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605 { |
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606 // FIXME -- we should come up with a clean way to detect |
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607 // that we are stopped on the no-op command that marks the |
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608 // end of a function or script. |
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609 |
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610 buf << "stopped in " << nm; |
| 1 | 611 |
|
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612 if (curr_debug_line > 0) |
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613 buf << " at line " << curr_debug_line; |
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614 |
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615 if (have_file) |
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616 { |
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617 std::string line_buf |
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618 = get_file_line (nm, curr_debug_line); |
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619 |
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620 if (! line_buf.empty ()) |
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621 buf << "\n" << curr_debug_line << ": " << line_buf; |
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622 } |
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623 } |
| 3180 | 624 } |
| 625 | |
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626 std::string msg = buf.str (); |
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627 |
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628 if (! msg.empty ()) |
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629 message (Vgud_mode ? 0 : "keyboard", msg.c_str ()); |
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630 |
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631 unwind_protect::begin_frame ("get_debug_input"); |
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632 |
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633 unwind_protect_str (VPS1); |
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634 VPS1 = prompt; |
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635 |
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636 while (Vdebugging) |
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637 { |
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638 reset_error_handler (); |
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639 |
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640 reset_parser (); |
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641 |
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642 // Save current value of global_command. |
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643 unwind_protect_ptr (global_command); |
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644 |
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645 // This is the same as yyparse in parse.y. |
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646 int retval = octave_parse (); |
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647 |
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648 if (retval == 0 && global_command) |
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649 { |
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650 global_command->accept (*current_evaluator); |
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651 |
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652 // FIXME -- To avoid a memory leak, global_command should be |
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653 // deleted, I think. But doing that here causes trouble if |
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654 // an error occurs while executing a debugging command |
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655 // (dbstep, for example). It's not clear to me why that |
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656 // happens. |
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657 // |
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658 // delete global_command; |
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659 // |
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660 // global_command = 0; |
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661 |
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662 if (octave_completion_matches_called) |
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663 octave_completion_matches_called = false; |
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664 } |
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665 |
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666 // Restore previous value of global_command. |
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667 unwind_protect::run (); |
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668 |
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669 OCTAVE_QUIT; |
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670 } |
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671 |
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672 unwind_protect::run_frame ("get_debug_input"); |
| 529 | 673 } |
| 674 | |
| 581 | 675 // If the user simply hits return, this will produce an empty matrix. |
| 676 | |
| 2086 | 677 static octave_value_list |
|
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678 get_user_input (const octave_value_list& args, int nargout) |
| 529 | 679 { |
| 3100 | 680 octave_value_list retval; |
| 529 | 681 |
| 682 int nargin = args.length (); | |
| 683 | |
| 684 int read_as_string = 0; | |
| 685 | |
| 712 | 686 if (nargin == 2) |
| 529 | 687 read_as_string++; |
| 688 | |
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689 std::string prompt = args(0).string_value (); |
| 4975 | 690 |
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691 if (error_state) |
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692 { |
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693 error ("input: unrecognized argument"); |
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694 return retval; |
| 4975 | 695 } |
| 696 | |
| 2095 | 697 flush_octave_stdout (); |
| 529 | 698 |
| 4565 | 699 octave_diary << prompt; |
| 700 | |
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701 std::string input_buf = interactive_input (prompt.c_str (), true); |
| 529 | 702 |
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703 if (! (error_state || input_buf.empty ())) |
| 529 | 704 { |
| 1799 | 705 if (! input_from_startup_file) |
| 2927 | 706 command_history::add (input_buf); |
| 529 | 707 |
| 2927 | 708 size_t len = input_buf.length (); |
| 529 | 709 |
| 4565 | 710 octave_diary << input_buf; |
| 711 | |
| 712 if (input_buf[len - 1] != '\n') | |
| 713 octave_diary << "\n"; | |
| 714 | |
| 529 | 715 if (len < 1) |
|
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716 return read_as_string ? octave_value ("") : octave_value (Matrix ()); |
| 3772 | 717 |
| 718 if (read_as_string) | |
| 963 | 719 { |
| 5775 | 720 // FIXME -- fix gnu_readline and octave_gets instead! |
| 3081 | 721 if (input_buf.length () == 1 && input_buf[0] == '\n') |
| 3100 | 722 retval(0) = ""; |
| 3081 | 723 else |
| 3100 | 724 retval(0) = input_buf; |
| 963 | 725 } |
| 529 | 726 else |
| 727 { | |
| 728 int parse_status = 0; | |
| 2900 | 729 |
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730 retval = eval_string (input_buf, true, parse_status, nargout); |
| 3100 | 731 |
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732 if (! Vdebugging && retval.length () == 0) |
| 3100 | 733 retval(0) = Matrix (); |
| 529 | 734 } |
| 735 } | |
| 736 else | |
| 737 error ("input: reading user-input failed!"); | |
| 738 | |
| 739 return retval; | |
| 740 } | |
| 741 | |
| 3100 | 742 DEFUN (input, args, nargout, |
| 3372 | 743 "-*- texinfo -*-\n\ |
| 744 @deftypefn {Built-in Function} {} input (@var{prompt})\n\ | |
| 745 @deftypefnx {Built-in Function} {} input (@var{prompt}, \"s\")\n\ | |
| 746 Print a prompt and wait for user input. For example,\n\ | |
| 747 \n\ | |
| 748 @example\n\ | |
| 749 input (\"Pick a number, any number! \")\n\ | |
| 750 @end example\n\ | |
| 751 \n\ | |
| 752 @noindent\n\ | |
| 753 prints the prompt\n\ | |
| 754 \n\ | |
| 755 @example\n\ | |
| 756 Pick a number, any number!\n\ | |
| 757 @end example\n\ | |
| 529 | 758 \n\ |
| 3372 | 759 @noindent\n\ |
| 760 and waits for the user to enter a value. The string entered by the user\n\ | |
| 761 is evaluated as an expression, so it may be a literal constant, a\n\ | |
| 762 variable name, or any other valid expression.\n\ | |
| 763 \n\ | |
| 764 Currently, @code{input} only returns one value, regardless of the number\n\ | |
| 765 of values produced by the evaluation of the expression.\n\ | |
| 766 \n\ | |
| 767 If you are only interested in getting a literal string value, you can\n\ | |
| 768 call @code{input} with the character string @code{\"s\"} as the second\n\ | |
| 769 argument. This tells Octave to return the string entered by the user\n\ | |
| 770 directly, without evaluating it first.\n\ | |
| 771 \n\ | |
| 772 Because there may be output waiting to be displayed by the pager, it is\n\ | |
| 773 a good idea to always call @code{fflush (stdout)} before calling\n\ | |
| 774 @code{input}. This will ensure that all pending output is written to\n\ | |
| 775 the screen before your prompt. @xref{Input and Output}.\n\ | |
| 776 @end deftypefn") | |
| 529 | 777 { |
| 2086 | 778 octave_value_list retval; |
| 529 | 779 |
| 780 int nargin = args.length (); | |
| 781 | |
| 712 | 782 if (nargin == 1 || nargin == 2) |
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783 retval = get_user_input (args, nargout); |
| 529 | 784 else |
| 5823 | 785 print_usage (); |
| 529 | 786 |
| 787 return retval; | |
| 788 } | |
| 789 | |
| 5640 | 790 bool |
| 791 octave_yes_or_no (const std::string& prompt) | |
| 792 { | |
| 793 std::string prompt_string = prompt + "(yes or no) "; | |
| 794 | |
| 795 while (1) | |
| 796 { | |
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797 std::string input_buf = interactive_input (prompt_string, true); |
| 5640 | 798 |
| 799 if (input_buf == "yes") | |
| 800 return true; | |
| 801 else if (input_buf == "no") | |
| 802 return false; | |
| 803 else | |
| 804 message (0, "Please answer yes or no."); | |
| 805 } | |
| 806 } | |
| 807 | |
| 808 DEFUN (yes_or_no, args, , | |
| 809 "-*- texinfo -*-\n\ | |
| 810 @deftypefn {Built-in Function} {} yes_or_no (@var{prompt})\n\ | |
| 811 Ask the user a yes-or-no question. Return 1 if the answer is yes.\n\ | |
| 812 Takes one argument, which is the string to display to ask the\n\ | |
| 813 question. It should end in a space; @samp{yes-or-no-p} adds\n\ | |
| 814 @samp{(yes or no) } to it. The user must confirm the answer with\n\ | |
| 815 RET and can edit it until it has been confirmed.\n\ | |
| 816 @end deftypefn") | |
| 817 { | |
| 818 octave_value retval; | |
| 819 | |
| 820 int nargin = args.length (); | |
| 821 | |
| 822 if (nargin == 0 || nargin == 1) | |
| 823 { | |
| 824 std::string prompt; | |
| 825 | |
| 826 if (nargin == 1) | |
| 827 { | |
| 828 prompt = args(0).string_value (); | |
| 829 | |
| 830 if (error_state) | |
| 831 { | |
| 832 error ("yes_or_no: expecting argument to be character string"); | |
| 833 return retval; | |
| 834 } | |
| 835 } | |
| 836 | |
| 837 retval = octave_yes_or_no (prompt); | |
| 838 } | |
| 839 else | |
| 5823 | 840 print_usage (); |
| 5640 | 841 |
| 842 return retval; | |
| 843 } | |
| 844 | |
| 3098 | 845 static void |
| 846 restore_command_history (void *) | |
| 847 { | |
| 848 command_history::ignore_entries (! Vsaving_history); | |
| 849 } | |
| 850 | |
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851 static size_t saved_frame = 0; |
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852 |
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853 static void |
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854 restore_frame (void *) |
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855 { |
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856 octave_call_stack::goto_frame (saved_frame); |
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857 } |
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858 |
| 3707 | 859 octave_value |
| 860 do_keyboard (const octave_value_list& args) | |
| 861 { | |
| 862 octave_value retval; | |
| 863 | |
| 864 int nargin = args.length (); | |
| 865 | |
| 866 assert (nargin == 0 || nargin == 1); | |
| 867 | |
| 868 unwind_protect::begin_frame ("do_keyboard"); | |
| 869 | |
| 5775 | 870 // FIXME -- we shouldn't need both the |
| 3707 | 871 // command_history object and the |
| 872 // Vsaving_history variable... | |
| 873 command_history::ignore_entries (false); | |
| 874 | |
| 875 unwind_protect::add (restore_command_history, 0); | |
| 876 | |
| 877 unwind_protect_bool (Vsaving_history); | |
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878 unwind_protect_bool (Vdebugging); |
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879 |
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880 saved_frame = octave_call_stack::current_frame (); |
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881 unwind_protect::add (restore_frame); |
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882 unwind_protect_size_t (saved_frame); |
| 3707 | 883 |
| 884 Vsaving_history = true; | |
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885 Vdebugging = true; |
| 3707 | 886 |
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887 std::string prompt = "debug> "; |
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888 if (nargin > 0) |
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889 prompt = args(0).string_value (); |
| 4233 | 890 |
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891 if (! error_state) |
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892 get_debug_input (prompt); |
| 3707 | 893 |
| 894 unwind_protect::run_frame ("do_keyboard"); | |
| 895 | |
| 896 return retval; | |
| 897 } | |
| 898 | |
| 1957 | 899 DEFUN (keyboard, args, , |
| 3372 | 900 "-*- texinfo -*-\n\ |
| 901 @deftypefn {Built-in Function} {} keyboard (@var{prompt})\n\ | |
| 902 This function is normally used for simple debugging. When the\n\ | |
| 903 @code{keyboard} function is executed, Octave prints a prompt and waits\n\ | |
| 904 for user input. The input strings are then evaluated and the results\n\ | |
| 905 are printed. This makes it possible to examine the values of variables\n\ | |
| 906 within a function, and to assign new values to variables. No value is\n\ | |
| 907 returned from the @code{keyboard} function, and it continues to prompt\n\ | |
| 908 for input until the user types @samp{quit}, or @samp{exit}.\n\ | |
| 529 | 909 \n\ |
| 3372 | 910 If @code{keyboard} is invoked without any arguments, a default prompt of\n\ |
| 911 @samp{debug> } is used.\n\ | |
| 912 @end deftypefn") | |
| 529 | 913 { |
| 2086 | 914 octave_value_list retval; |
| 529 | 915 |
| 916 int nargin = args.length (); | |
| 917 | |
| 712 | 918 if (nargin == 0 || nargin == 1) |
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919 { |
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920 saved_frame = octave_call_stack::current_frame (); |
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921 unwind_protect::add (restore_frame); |
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922 unwind_protect_size_t (saved_frame); |
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923 |
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924 // Skip the frame assigned to the keyboard function. |
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925 octave_call_stack::goto_frame (1); |
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926 |
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927 do_keyboard (args); |
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928 |
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929 unwind_protect::run (); |
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930 } |
| 529 | 931 else |
| 5823 | 932 print_usage (); |
| 529 | 933 |
| 934 return retval; | |
| 935 } | |
| 936 | |
|
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937 DEFUN (echo, args, , |
| 3332 | 938 "-*- texinfo -*-\n\ |
| 939 @deffn {Command} echo options\n\ | |
| 940 Control whether commands are displayed as they are executed. Valid\n\ | |
| 941 options are:\n\ | |
| 1588 | 942 \n\ |
| 3332 | 943 @table @code\n\ |
| 944 @item on\n\ | |
| 945 Enable echoing of commands as they are executed in script files.\n\ | |
| 946 \n\ | |
| 947 @item off\n\ | |
| 948 Disable echoing of commands as they are executed in script files.\n\ | |
| 1588 | 949 \n\ |
| 3332 | 950 @item on all\n\ |
| 951 Enable echoing of commands as they are executed in script files and\n\ | |
| 952 functions.\n\ | |
| 1588 | 953 \n\ |
| 3332 | 954 @item off all\n\ |
| 955 Disable echoing of commands as they are executed in script files and\n\ | |
| 956 functions.\n\ | |
| 957 @end table\n\ | |
| 958 \n\ | |
| 959 @noindent\n\ | |
| 960 If invoked without any arguments, @code{echo} toggles the current echo\n\ | |
| 961 state.\n\ | |
| 3333 | 962 @end deffn") |
| 1588 | 963 { |
| 2086 | 964 octave_value_list retval; |
| 1588 | 965 |
| 1755 | 966 int argc = args.length () + 1; |
| 967 | |
| 1968 | 968 string_vector argv = args.make_argv ("echo"); |
| 1755 | 969 |
| 970 if (error_state) | |
| 971 return retval; | |
| 1588 | 972 |
| 973 switch (argc) | |
| 974 { | |
| 975 case 1: | |
| 976 { | |
| 2205 | 977 if ((Vecho_executing_commands & ECHO_SCRIPTS) |
| 978 || (Vecho_executing_commands & ECHO_FUNCTIONS)) | |
| 5794 | 979 Vecho_executing_commands = ECHO_OFF; |
| 1588 | 980 else |
| 5794 | 981 Vecho_executing_commands = ECHO_SCRIPTS; |
| 1588 | 982 } |
| 983 break; | |
| 984 | |
| 985 case 2: | |
| 986 { | |
| 3523 | 987 std::string arg = argv[1]; |
| 1755 | 988 |
| 989 if (arg == "on") | |
| 5794 | 990 Vecho_executing_commands = ECHO_SCRIPTS; |
| 1755 | 991 else if (arg == "off") |
| 5794 | 992 Vecho_executing_commands = ECHO_OFF; |
| 1588 | 993 else |
| 5823 | 994 print_usage (); |
| 1588 | 995 } |
| 996 break; | |
| 997 | |
| 998 case 3: | |
| 999 { | |
| 3523 | 1000 std::string arg = argv[1]; |
| 1755 | 1001 |
| 1002 if (arg == "on" && argv[2] == "all") | |
| 2800 | 1003 { |
| 1004 int tmp = (ECHO_SCRIPTS | ECHO_FUNCTIONS); | |
| 5794 | 1005 Vecho_executing_commands = tmp; |
| 2800 | 1006 } |
| 1755 | 1007 else if (arg == "off" && argv[2] == "all") |
| 5794 | 1008 Vecho_executing_commands = ECHO_OFF; |
| 1588 | 1009 else |
| 5823 | 1010 print_usage (); |
| 1588 | 1011 } |
| 1012 break; | |
| 1013 | |
| 1014 default: | |
| 5823 | 1015 print_usage (); |
| 1588 | 1016 break; |
| 1017 } | |
| 1018 | |
| 1019 return retval; | |
| 1020 } | |
| 1021 | |
| 2234 | 1022 DEFUN (completion_matches, args, nargout, |
| 3332 | 1023 "-*- texinfo -*-\n\ |
| 1024 @deftypefn {Built-in Function} {} completion_matches (@var{hint})\n\ | |
| 1025 Generate possible completions given @var{hint}.\n\ | |
| 2299 | 1026 \n\ |
| 1027 This function is provided for the benefit of programs like Emacs which\n\ | |
| 3332 | 1028 might be controlling Octave and handling user input. The current\n\ |
| 1029 command number is not incremented when this function is called. This is\n\ | |
| 1030 a feature, not a bug.\n\ | |
| 3333 | 1031 @end deftypefn") |
| 2234 | 1032 { |
| 2281 | 1033 octave_value retval; |
| 2234 | 1034 |
| 1035 int nargin = args.length (); | |
| 1036 | |
| 1037 if (nargin == 1) | |
| 1038 { | |
| 3523 | 1039 std::string hint = args(0).string_value (); |
| 2234 | 1040 |
| 1041 if (! error_state) | |
| 1042 { | |
| 1043 int n = 32; | |
| 1044 | |
| 1045 string_vector list (n); | |
| 1046 | |
| 1047 int k = 0; | |
| 1048 | |
| 1049 for (;;) | |
| 1050 { | |
| 3523 | 1051 std::string cmd = generate_completion (hint, k); |
| 2234 | 1052 |
| 2944 | 1053 if (! cmd.empty ()) |
| 2234 | 1054 { |
| 2944 | 1055 if (k == n) |
| 2234 | 1056 { |
| 2944 | 1057 n *= 2; |
| 1058 list.resize (n); | |
| 1059 } | |
| 2235 | 1060 |
| 2944 | 1061 list[k++] = cmd; |
| 2234 | 1062 } |
| 1063 else | |
| 1064 { | |
| 1065 list.resize (k); | |
| 1066 break; | |
| 1067 } | |
| 1068 } | |
| 1069 | |
| 1070 if (nargout > 0) | |
| 2281 | 1071 { |
| 1072 if (! list.empty ()) | |
| 1073 retval = list; | |
| 2282 | 1074 else |
| 1075 retval = ""; | |
| 2281 | 1076 } |
| 2234 | 1077 else |
| 1078 { | |
| 2235 | 1079 // We don't use string_vector::list_in_columns here |
| 1080 // because it will be easier for Emacs if the names | |
| 1081 // appear in a single column. | |
| 1082 | |
| 2234 | 1083 int len = list.length (); |
| 1084 | |
| 1085 for (int i = 0; i < len; i++) | |
| 1086 octave_stdout << list[i] << "\n"; | |
| 1087 } | |
| 2299 | 1088 |
| 1089 octave_completion_matches_called = true; | |
| 2234 | 1090 } |
| 1091 } | |
| 1092 else | |
| 5823 | 1093 print_usage (); |
| 2234 | 1094 |
| 1095 return retval; | |
| 1096 } | |
| 1097 | |
| 3189 | 1098 DEFUN (read_readline_init_file, args, , |
| 3448 | 1099 "-*- texinfo -*-\n\ |
| 1100 @deftypefn {Built-in Function} {} read_readline_init_file (@var{file})\n\ | |
| 7007 | 1101 Read the readline library initialization file @var{file}. If\n\ |
| 3448 | 1102 @var{file} is omitted, read the default initialization file (normally\n\ |
| 6615 | 1103 @file{~/.inputrc}).\n\ |
| 1104 \n\ | |
| 1105 @xref{Readline Init File, , , readline, GNU Readline Library},\n\ | |
| 1106 for details.\n\ | |
| 3448 | 1107 @end deftypefn") |
| 3189 | 1108 { |
| 1109 octave_value_list retval; | |
| 1110 | |
| 1111 int nargin = args.length (); | |
| 1112 | |
| 1113 if (nargin == 0) | |
| 1114 command_editor::read_init_file (); | |
| 1115 else if (nargin == 1) | |
| 1116 { | |
| 5872 | 1117 std::string file = args(0).string_value (); |
| 3189 | 1118 |
| 1119 if (! error_state) | |
| 1120 command_editor::read_init_file (file); | |
| 1121 } | |
| 1122 else | |
| 5823 | 1123 print_usage (); |
| 3189 | 1124 |
| 1125 return retval; | |
| 1126 } | |
| 1127 | |
|
7758
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1128 DEFUN (re_read_readline_init_file, args, , |
|
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1129 "-*- texinfo -*-\n\ |
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1130 @deftypefn {Built-in Function} {} re_read_readline_init_file ()\n\ |
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1131 Re-read the last readline library initialization file that was read.\n\ |
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1132 @xref{Readline Init File, , , readline, GNU Readline Library},\n\ |
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1133 for details.\n\ |
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1134 @end deftypefn") |
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1135 { |
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1136 octave_value_list retval; |
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1137 |
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1138 if (args.length () == 0) |
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1139 command_editor::re_read_init_file (); |
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1140 else |
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1141 print_usage (); |
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1142 |
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1143 return retval; |
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1144 } |
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1145 |
| 3523 | 1146 static std::string hook_fcn; |
| 3498 | 1147 static octave_value user_data; |
| 1148 | |
| 4802 | 1149 static int |
| 3519 | 1150 input_event_hook (void) |
| 3498 | 1151 { |
| 4526 | 1152 if (is_valid_function (hook_fcn)) |
| 1153 { | |
| 1154 if (user_data.is_defined ()) | |
| 1155 feval (hook_fcn, user_data, 0); | |
| 1156 else | |
| 1157 feval (hook_fcn, octave_value_list (), 0); | |
| 1158 } | |
| 3498 | 1159 else |
| 4526 | 1160 { |
| 1161 hook_fcn = std::string (); | |
| 1162 user_data = octave_value (); | |
| 1163 | |
| 6913 | 1164 command_editor::remove_event_hook (input_event_hook); |
| 4802 | 1165 } |
| 1166 | |
| 1167 return 0; | |
| 3498 | 1168 } |
| 1169 | |
| 1170 DEFUN (input_event_hook, args, , | |
| 1171 "-*- texinfo -*-\n\ | |
| 1172 @deftypefn {Built-in Function} {[@var{ofcn}, @var{odata}] =} input_event_hook (@var{fcn}, @var{data})\n\ | |
| 1173 Given the name of a function as a string and any Octave value object,\n\ | |
| 1174 install @var{fcn} as a function to call periodically, when Octave is\n\ | |
| 1175 waiting for input. The function should have the form\n\ | |
| 1176 @example\n\ | |
| 1177 @var{fcn} (@var{data})\n\ | |
| 1178 @end example\n\ | |
| 1179 \n\ | |
| 1180 If @var{data} is omitted, Octave calls the function without any\n\ | |
| 1181 arguments. If both @var{fcn} and @var{data} are omitted, Octave\n\ | |
| 1182 clears the hook. In all cases, the name of the previous hook function\n\ | |
| 1183 and the user data are returned.\n\ | |
| 1184 @end deftypefn") | |
| 1185 { | |
| 1186 octave_value_list retval; | |
| 1187 | |
| 1188 int nargin = args.length (); | |
| 1189 | |
| 1190 if (nargin > 2) | |
| 5823 | 1191 print_usage (); |
| 3498 | 1192 else |
| 1193 { | |
| 1194 octave_value tmp_user_data; | |
| 1195 | |
| 3523 | 1196 std::string tmp_hook_fcn; |
| 3498 | 1197 |
| 1198 if (nargin > 1) | |
| 1199 tmp_user_data = args(1); | |
| 1200 | |
| 1201 if (nargin > 0) | |
| 1202 { | |
| 1203 tmp_hook_fcn = args(0).string_value (); | |
| 1204 | |
| 1205 if (error_state) | |
| 1206 { | |
| 1207 error ("input_event_hook: expecting string as first arg"); | |
| 1208 return retval; | |
| 1209 } | |
| 1210 | |
| 6913 | 1211 command_editor::add_event_hook (input_event_hook); |
| 3498 | 1212 } |
| 1213 | |
| 1214 if (nargin == 0) | |
| 6913 | 1215 command_editor::remove_event_hook (input_event_hook); |
| 3498 | 1216 |
| 1217 retval(1) = user_data; | |
| 1218 retval(0) = hook_fcn; | |
| 1219 | |
| 1220 hook_fcn = tmp_hook_fcn; | |
| 1221 user_data = tmp_user_data; | |
| 1222 } | |
| 1223 | |
| 1224 return retval; | |
| 1225 } | |
| 1226 | |
| 5794 | 1227 DEFUN (PS1, args, nargout, |
| 1228 "-*- texinfo -*-\n\ | |
| 1229 @deftypefn {Built-in Function} {@var{val} =} PS1 ()\n\ | |
| 1230 @deftypefnx {Built-in Function} {@var{old_val} =} PS1 (@var{new_val})\n\ | |
| 1231 Query or set the primary prompt string. When executing interactively,\n\ | |
| 1232 Octave displays the primary prompt when it is ready to read a command.\n\ | |
| 3332 | 1233 \n\ |
| 5794 | 1234 The default value of the primary prompt string is @code{\"\\s:\\#> \"}.\n\ |
| 1235 To change it, use a command like\n\ | |
| 3332 | 1236 \n\ |
| 1237 @example\n\ | |
| 7097 | 1238 octave:13> PS1 (\"\\\\u@@\\\\H> \")\n\ |
| 3332 | 1239 @end example\n\ |
| 1240 \n\ | |
| 1241 @noindent\n\ | |
| 1242 which will result in the prompt @samp{boris@@kremvax> } for the user\n\ | |
| 1243 @samp{boris} logged in on the host @samp{kremvax.kgb.su}. Note that two\n\ | |
| 5794 | 1244 backslashes are required to enter a backslash into a double-quoted\n\ |
| 1245 character string.\n\ | |
| 3332 | 1246 @xref{Strings}.\n\ |
| 6373 | 1247 @seealso{PS2, PS4}\n\ |
| 5794 | 1248 @end deftypefn") |
| 1249 { | |
| 1250 return SET_INTERNAL_VARIABLE (PS1); | |
| 1251 } | |
| 2181 | 1252 |
| 5794 | 1253 DEFUN (PS2, args, nargout, |
| 1254 "-*- texinfo -*-\n\ | |
| 1255 @deftypefn {Built-in Function} {@var{val} =} PS2 ()\n\ | |
| 1256 @deftypefnx {Built-in Function} {@var{old_val} =} PS2 (@var{new_val})\n\ | |
| 1257 Query or set the secondary prompt string. The secondary prompt is\n\ | |
| 1258 printed when Octave is expecting additional input to complete a\n\ | |
| 1259 command. For example, if you are typing a for loop that spans several\n\ | |
| 1260 lines, Octave will print the secondary prompt at the beginning of\n\ | |
| 1261 each line after the first. The default value of the secondary prompt\n\ | |
| 1262 string is @code{\"> \"}.\n\ | |
| 1263 @seealso{PS1, PS4}\n\ | |
| 1264 @end deftypefn") | |
| 1265 { | |
| 1266 return SET_INTERNAL_VARIABLE (PS2); | |
| 1267 } | |
| 2181 | 1268 |
| 5794 | 1269 DEFUN (PS4, args, nargout, |
| 1270 "-*- texinfo -*-\n\ | |
| 1271 @deftypefn {Built-in Function} {@var{val} =} PS4 ()\n\ | |
| 1272 @deftypefnx {Built-in Function} {@var{old_val} =} PS4 (@var{new_val})\n\ | |
| 1273 Query or set the character string used to prefix output produced\n\ | |
| 1274 when echoing commands when @code{echo_executing_commands} is enabled.\n\ | |
| 6620 | 1275 The default value is @code{\"+ \"}.\n\ |
| 1276 @xref{Invoking Octave from the Command Line}, for a description of\n\ | |
| 1277 @code{--echo-commands}.\n\ | |
| 5794 | 1278 @seealso{echo_executing_commands, PS1, PS2}\n\ |
| 1279 @end deftypefn") | |
| 1280 { | |
| 1281 return SET_INTERNAL_VARIABLE (PS4); | |
| 1282 } | |
| 2181 | 1283 |
| 5794 | 1284 DEFUN (completion_append_char, args, nargout, |
| 1285 "-*- texinfo -*-\n\ | |
| 1286 @deftypefn {Built-in Function} {@var{val} =} completion_append_char ()\n\ | |
| 1287 @deftypefnx {Built-in Function} {@var{old_val} =} completion_append_char (@var{new_val})\n\ | |
| 1288 Query or set the internal character variable that is appended to\n\ | |
| 1289 successful command-line completion attempts. The default\n\ | |
| 3332 | 1290 value is @code{\" \"} (a single space).\n\ |
| 5794 | 1291 @end deftypefn") |
| 1292 { | |
| 1293 return SET_INTERNAL_VARIABLE (completion_append_char); | |
| 1294 } | |
| 3019 | 1295 |
| 5794 | 1296 DEFUN (echo_executing_commands, args, nargout, |
| 1297 "-*- texinfo -*-\n\ | |
| 1298 @deftypefn {Built-in Function} {@var{val} =} echo_executing_commands ()\n\ | |
| 1299 @deftypefnx {Built-in Function} {@var{old_val} =} echo_executing_commands (@var{new_val})\n\ | |
| 1300 Query or set the internal variable that controls the echo state.\n\ | |
| 1301 It may be the sum of the following values:\n\ | |
| 3332 | 1302 \n\ |
| 1303 @table @asis\n\ | |
| 1304 @item 1\n\ | |
| 1305 Echo commands read from script files.\n\ | |
| 1306 \n\ | |
| 1307 @item 2\n\ | |
| 1308 Echo commands from functions.\n\ | |
| 1309 \n\ | |
| 1310 @item 4\n\ | |
| 1311 Echo commands read from command line.\n\ | |
| 1312 @end table\n\ | |
| 1313 \n\ | |
| 1314 More than one state can be active at once. For example, a value of 3 is\n\ | |
| 1315 equivalent to the command @kbd{echo on all}.\n\ | |
| 1316 \n\ | |
| 1317 The value of @code{echo_executing_commands} is set by the @kbd{echo}\n\ | |
| 1318 command and the command line option @code{--echo-input}.\n\ | |
| 5794 | 1319 @end deftypefn") |
| 1320 { | |
| 1321 return SET_INTERNAL_VARIABLE (echo_executing_commands); | |
| 2181 | 1322 } |
| 1323 | |
| 6257 | 1324 DEFUN (__request_drawnow__, args, , |
| 1325 "-*- texinfo -*-\n\ | |
| 1326 @deftypefn {Built-in Function} {} __request_drawnow__ ()\n\ | |
| 1327 @deftypefnx {Built-in Function} {} __request_drawnow__ (@var{flag})\n\ | |
| 6945 | 1328 Undocumented internal function.\n\ |
| 6257 | 1329 @end deftypefn") |
| 1330 { | |
| 1331 octave_value retval; | |
| 1332 | |
| 1333 int nargin = args.length (); | |
| 1334 | |
| 1335 if (nargin == 0) | |
| 1336 Vdrawnow_requested = true; | |
| 1337 else if (nargin == 1) | |
| 1338 Vdrawnow_requested = args(0).bool_value (); | |
| 1339 else | |
| 1340 print_usage (); | |
| 1341 | |
| 1342 return retval; | |
| 1343 } | |
| 1344 | |
| 7294 | 1345 DEFUN (__gud_mode__, args, , |
| 1346 "-*- texinfo -*-\n\ | |
| 1347 @deftypefn {Built-in Function} {} __gud_mode__ ()\n\ | |
| 1348 Undocumented internal function.\n\ | |
| 1349 @end deftypefn") | |
| 1350 { | |
| 1351 octave_value retval; | |
| 1352 | |
| 1353 int nargin = args.length (); | |
| 1354 | |
| 1355 if (nargin == 0) | |
| 1356 retval = Vgud_mode; | |
| 1357 else if (nargin == 1) | |
| 1358 Vgud_mode = args(0).bool_value (); | |
| 1359 else | |
| 1360 print_usage (); | |
| 1361 | |
| 1362 return retval; | |
| 1363 } | |
| 1364 | |
|
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1365 DEFUN (filemarker, args, nargout, |
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1366 "-*- texinfo -*-\n\ |
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1367 @deftypefn {Built-in Function} {} filemarker ()\n\ |
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1368 Returns or sets the character used to separate filename from the\n\ |
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1369 the subfunction names contained within the file. This can be used in\n\ |
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1370 a generic manner to interact with subfunctions. For example\n\ |
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1371 \n\ |
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1372 @example\n\ |
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1373 help ([\"myfunc\", filemarker, \"mysubfunc\"])\n\ |
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1374 @end example\n\ |
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1375 \n\ |
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1376 @noindent\n\ |
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1377 returns the help string associated with the sub-function @code{mysubfunc}\n\ |
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1378 of the function @code{myfunc}. Another use of @code{filemarker} is when\n\ |
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1379 debugging it allows easier placement of breakpoints within sub-functions.\n\ |
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1380 For example\n\ |
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1381 \n\ |
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1382 @example\n\ |
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1383 dbstop ([\"myfunc\", filemarker, \"mysubfunc\"])\n\ |
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1384 @end example\n\ |
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1385 \n\ |
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1386 @noindent\n\ |
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1387 will set a breakpoint at the first line of the subfunction @code{mysubfunc}.\n\ |
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1388 @end deftypefn") |
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1389 { |
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1390 char tmp = Vfilemarker; |
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1391 octave_value retval = SET_INTERNAL_VARIABLE (filemarker); |
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1392 |
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1393 // The character passed must not be a legal character for a function name |
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1394 if (! error_state && (::isalnum (Vfilemarker) || Vfilemarker == '_')) |
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1395 { |
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1396 Vfilemarker = tmp; |
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1397 error ("filemarker: character can not be a valid character for a function name"); |
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1398 } |
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1399 |
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1400 return retval; |
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1401 } |
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1402 |
| 1 | 1403 /* |
| 1404 ;;; Local Variables: *** | |
| 1405 ;;; mode: C++ *** | |
| 1406 ;;; End: *** | |
| 1407 */ |