Mercurial > octave-nkf
annotate src/input.cc @ 7948:af10baa63915 ss-3-1-50
3.1.50 snapshot
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Fri, 18 Jul 2008 17:42:48 -0400 |
| parents | f46e73bcb85b |
| children | 0ef13e15319b |
| 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 | |
| 1352 | 51 #include "defun.h" |
| 52 #include "dirfns.h" | |
| 1 | 53 #include "error.h" |
| 2181 | 54 #include "gripes.h" |
| 3016 | 55 #include "help.h" |
| 1 | 56 #include "input.h" |
| 5832 | 57 #include "load-path.h" |
| 1352 | 58 #include "oct-map.h" |
| 1742 | 59 #include "oct-hist.h" |
| 1670 | 60 #include "toplev.h" |
| 1755 | 61 #include "oct-obj.h" |
| 1 | 62 #include "pager.h" |
| 529 | 63 #include "parse.h" |
| 1352 | 64 #include "pathlen.h" |
| 3772 | 65 #include "pt.h" |
| 1755 | 66 #include "pt-const.h" |
| 3805 | 67 #include "pt-stmt.h" |
| 1352 | 68 #include "sighandlers.h" |
| 1114 | 69 #include "sysdep.h" |
|
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70 #include "toplev.h" |
| 3098 | 71 #include "unwind-prot.h" |
| 1352 | 72 #include "utils.h" |
| 73 #include "variables.h" | |
| 529 | 74 |
| 2181 | 75 // Primary prompt string. |
| 5794 | 76 static std::string VPS1 = "\\s:\\#> "; |
| 2181 | 77 |
| 78 // Secondary prompt string. | |
| 5794 | 79 static std::string VPS2 = "> "; |
| 2181 | 80 |
| 81 // String printed before echoed input (enabled by --echo-input). | |
| 5794 | 82 std::string VPS4 = "+ "; |
| 2181 | 83 |
| 3019 | 84 // Echo commands as they are executed? |
| 85 // | |
| 86 // 1 ==> echo commands read from script files | |
| 87 // 2 ==> echo commands from functions | |
| 88 // 4 ==> echo commands read from command line | |
| 89 // | |
| 90 // more than one state can be active at once. | |
| 5794 | 91 int Vecho_executing_commands = ECHO_OFF; |
| 3019 | 92 |
| 3165 | 93 // The time we last printed a prompt. |
| 5832 | 94 octave_time Vlast_prompt_time = 0.0; |
| 3165 | 95 |
| 2181 | 96 // Character to append after successful command-line completion attempts. |
| 5794 | 97 static char Vcompletion_append_char = ' '; |
| 2181 | 98 |
| 1 | 99 // Global pointer for eval(). |
| 3523 | 100 std::string current_eval_string; |
| 1 | 101 |
| 3019 | 102 // TRUE means get input from current_eval_string. |
| 103 bool get_input_from_eval_string = false; | |
| 1 | 104 |
| 3877 | 105 // TRUE means we haven't been asked for the input from |
| 106 // current_eval_string yet. | |
| 107 bool input_from_eval_string_pending = false; | |
| 108 | |
| 5189 | 109 // TRUE means that input is coming from a file that was named on |
| 110 // the command line. | |
| 111 bool input_from_command_line_file = false; | |
| 112 | |
| 3019 | 113 // TRUE means we're parsing a function file. |
| 114 bool reading_fcn_file = false; | |
| 1 | 115 |
| 338 | 116 // Simple name of function file we are reading. |
| 3523 | 117 std::string curr_fcn_file_name; |
| 1606 | 118 |
| 119 // Full name of file we are reading. | |
| 3523 | 120 std::string curr_fcn_file_full_name; |
| 1 | 121 |
| 3019 | 122 // TRUE means we're parsing a script file. |
| 123 bool reading_script_file = false; | |
| 1 | 124 |
| 125 // If we are reading from an M-file, this is it. | |
| 529 | 126 FILE *ff_instream = 0; |
| 1 | 127 |
| 3019 | 128 // TRUE means this is an interactive shell. |
| 129 bool interactive = false; | |
| 1 | 130 |
| 3019 | 131 // TRUE means the user forced this shell to be interactive (-i). |
| 132 bool forced_interactive = false; | |
| 1 | 133 |
| 134 // Should we issue a prompt? | |
| 135 int promptflag = 1; | |
| 136 | |
| 137 // The current line of input, from wherever. | |
| 3523 | 138 std::string current_input_line; |
| 1 | 139 |
| 3804 | 140 // TRUE after a call to completion_matches. |
| 2299 | 141 bool octave_completion_matches_called = false; |
| 142 | |
| 6257 | 143 // TRUE if the plotting system has requested a call to drawnow at |
| 144 // the next user prompt. | |
| 7409 | 145 bool Vdrawnow_requested = false; |
| 6257 | 146 |
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147 // TRUE if we are in debugging mode. |
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148 bool Vdebugging = false; |
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149 |
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150 // The current line that we are debugging |
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151 int Vdebugging_current_line = -1; |
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152 |
| 7294 | 153 // TRUE if we are running in the Emacs GUD mode. |
| 154 static bool Vgud_mode = false; | |
| 155 | |
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156 // The filemarker used to separate filenames from subfunction names |
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157 char Vfilemarker = '>'; |
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158 |
| 1044 | 159 static void |
| 3523 | 160 do_input_echo (const std::string& input_string) |
| 1044 | 161 { |
| 1588 | 162 int do_echo = reading_script_file ? |
| 2205 | 163 (Vecho_executing_commands & ECHO_SCRIPTS) |
| 2618 | 164 : (Vecho_executing_commands & ECHO_CMD_LINE) && ! forced_interactive; |
| 1588 | 165 |
| 166 if (do_echo) | |
| 1044 | 167 { |
| 1403 | 168 if (forced_interactive) |
| 169 { | |
| 1755 | 170 if (promptflag > 0) |
| 5794 | 171 octave_stdout << command_editor::decode_prompt_string (VPS1); |
| 1755 | 172 else |
| 5794 | 173 octave_stdout << command_editor::decode_prompt_string (VPS2); |
| 1403 | 174 } |
| 175 else | |
| 5794 | 176 octave_stdout << command_editor::decode_prompt_string (VPS4); |
| 1044 | 177 |
| 1755 | 178 if (! input_string.empty ()) |
| 1044 | 179 { |
| 2095 | 180 octave_stdout << input_string; |
| 1755 | 181 |
| 182 if (input_string[input_string.length () - 1] != '\n') | |
| 2095 | 183 octave_stdout << "\n"; |
| 1044 | 184 } |
| 185 } | |
| 186 } | |
| 187 | |
| 3536 | 188 std::string |
| 3523 | 189 gnu_readline (const std::string& s, bool force_readline) |
| 1822 | 190 { |
| 5142 | 191 OCTAVE_QUIT; |
| 192 | |
| 3523 | 193 std::string retval; |
| 1822 | 194 |
| 2927 | 195 if (line_editing || force_readline) |
| 1822 | 196 { |
| 3219 | 197 bool eof; |
| 1898 | 198 |
| 3219 | 199 retval = command_editor::readline (s, eof); |
| 200 | |
| 201 if (! eof && retval.empty ()) | |
| 2927 | 202 retval = "\n"; |
| 1822 | 203 } |
| 204 else | |
| 205 { | |
| 2927 | 206 if (! s.empty () && (interactive || forced_interactive)) |
| 2618 | 207 { |
| 2927 | 208 FILE *stream = command_editor::get_output_stream (); |
| 209 | |
| 210 fprintf (stream, s.c_str ()); | |
| 211 fflush (stream); | |
| 2618 | 212 } |
| 1822 | 213 |
| 2927 | 214 FILE *curr_stream = command_editor::get_input_stream (); |
| 215 | |
| 1822 | 216 if (reading_fcn_file || reading_script_file) |
| 217 curr_stream = ff_instream; | |
| 218 | |
| 2927 | 219 retval = octave_fgets (curr_stream); |
| 1822 | 220 } |
| 221 | |
| 222 return retval; | |
| 223 } | |
| 581 | 224 |
| 6257 | 225 static inline std::string |
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226 interactive_input (const std::string& s, bool force_readline = false) |
| 6257 | 227 { |
| 228 Vlast_prompt_time.stamp (); | |
| 229 | |
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230 if (Vdrawnow_requested && (interactive || forced_interactive)) |
| 6257 | 231 { |
| 232 feval ("drawnow"); | |
| 233 | |
| 6367 | 234 flush_octave_stdout (); |
| 235 | |
| 6305 | 236 // We set Vdrawnow_requested to false even if there is an error |
| 237 // in drawnow so that the error doesn't reappear at every prompt. | |
| 238 | |
| 6257 | 239 Vdrawnow_requested = false; |
| 6305 | 240 |
| 241 if (error_state) | |
| 242 return "\n"; | |
| 6257 | 243 } |
| 244 | |
| 245 return gnu_readline (s, force_readline); | |
| 246 } | |
| 247 | |
| 3536 | 248 static std::string |
| 1 | 249 octave_gets (void) |
| 250 { | |
| 5142 | 251 OCTAVE_QUIT; |
| 252 | |
| 3523 | 253 std::string retval; |
| 1 | 254 |
| 1822 | 255 if ((interactive || forced_interactive) |
| 5832 | 256 && (! (reading_fcn_file |
| 257 || reading_script_file | |
| 258 || input_from_startup_file | |
| 259 || input_from_command_line_file))) | |
| 1 | 260 { |
| 5794 | 261 std::string ps = (promptflag > 0) ? VPS1 : VPS2; |
| 1755 | 262 |
| 3523 | 263 std::string prompt = command_editor::decode_prompt_string (ps); |
| 1 | 264 |
| 2618 | 265 pipe_handler_error_count = 0; |
| 266 | |
| 267 flush_octave_stdout (); | |
| 1 | 268 |
| 2095 | 269 octave_diary << prompt; |
| 581 | 270 |
| 6257 | 271 retval = interactive_input (prompt); |
| 5832 | 272 |
| 273 // There is no need to update the load_path cache if there is no | |
| 274 // user input. | |
| 7336 | 275 if (! retval.empty () && retval.find_first_not_of (" \t\n\r") != 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 |
| 2114 | 332 if (! get_input_from_eval_string) |
| 333 input_line_number++; | |
| 1822 | 334 |
| 335 return retval; | |
| 336 } | |
| 337 | |
| 338 int | |
| 339 octave_read (char *buf, unsigned max_size) | |
| 340 { | |
| 5775 | 341 // FIXME -- is this a safe way to buffer the input? |
| 2927 | 342 |
| 4046 | 343 static const char * const eol = "\n"; |
| 3523 | 344 static std::string input_buf; |
| 2927 | 345 static const char *pos = 0; |
| 346 static size_t chars_left = 0; | |
| 1822 | 347 |
| 348 int status = 0; | |
| 4046 | 349 if (chars_left == 0) |
| 1822 | 350 { |
| 2927 | 351 pos = 0; |
| 352 | |
| 353 input_buf = get_user_input (); | |
| 1822 | 354 |
| 2927 | 355 chars_left = input_buf.length (); |
| 356 | |
| 357 pos = input_buf.c_str (); | |
| 1822 | 358 } |
| 359 | |
| 360 if (chars_left > 0) | |
| 361 { | |
| 4046 | 362 size_t len = max_size > chars_left ? chars_left : max_size; |
| 2927 | 363 assert (len > 0); |
| 364 | |
| 4046 | 365 memcpy (buf, pos, len); |
| 1822 | 366 |
| 4046 | 367 chars_left -= len; |
| 368 pos += len; | |
| 1822 | 369 |
| 4046 | 370 // Make sure input ends with a new line character. |
| 371 if (chars_left == 0 && buf[len-1] != '\n') | |
| 372 { | |
| 373 if (len < max_size) | |
| 374 { | |
| 375 // There is enough room to plug the newline character in | |
| 376 // the buffer. | |
| 377 buf[len++] = '\n'; | |
| 378 } | |
| 379 else | |
| 380 { | |
| 381 // There isn't enough room to plug the newline character | |
| 382 // in the buffer so make sure it is returned on the next | |
| 383 // octave_read call. | |
| 384 pos = eol; | |
| 385 chars_left = 1; | |
| 386 } | |
| 1 | 387 } |
| 1822 | 388 |
| 4046 | 389 status = len; |
| 1 | 390 |
| 1044 | 391 } |
| 1822 | 392 else if (chars_left == 0) |
| 2862 | 393 { |
| 394 status = 0; | |
| 395 } | |
| 1822 | 396 else |
| 397 status = -1; | |
| 1044 | 398 |
| 1 | 399 return status; |
| 400 } | |
| 401 | |
| 581 | 402 // Fix things up so that input can come from file `name', printing a |
| 403 // warning if the file doesn't exist. | |
| 404 | |
| 1 | 405 FILE * |
| 3523 | 406 get_input_from_file (const std::string& name, int warn) |
| 1 | 407 { |
| 529 | 408 FILE *instream = 0; |
| 1 | 409 |
| 1750 | 410 if (name.length () > 0) |
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411 instream = fopen (name.c_str (), "rb"); |
| 1 | 412 |
| 529 | 413 if (! instream && warn) |
| 1750 | 414 warning ("%s: no such file or directory", name.c_str ()); |
| 1 | 415 |
| 338 | 416 if (reading_fcn_file || reading_script_file) |
| 339 | 417 ff_instream = instream; |
| 1 | 418 else |
| 2927 | 419 command_editor::set_input_stream (instream); |
| 1 | 420 |
| 421 return instream; | |
| 422 } | |
| 423 | |
| 581 | 424 // Fix things up so that input can come from the standard input. This |
| 425 // may need to become much more complicated, which is why it's in a | |
| 426 // separate function. | |
| 427 | |
| 1 | 428 FILE * |
| 429 get_input_from_stdin (void) | |
| 430 { | |
| 2927 | 431 command_editor::set_input_stream (stdin); |
| 432 return command_editor::get_input_stream (); | |
| 1 | 433 } |
| 434 | |
| 5775 | 435 // FIXME -- make this generate file names when appropriate. |
| 2921 | 436 |
| 2247 | 437 static string_vector |
| 3523 | 438 generate_possible_completions (const std::string& text, std::string& prefix, |
| 439 std::string& hint) | |
| 1280 | 440 { |
| 2247 | 441 string_vector names; |
| 1280 | 442 |
| 2921 | 443 prefix = ""; |
| 1280 | 444 |
| 4604 | 445 if (looks_like_struct (text)) |
| 1430 | 446 names = generate_struct_completions (text, prefix, hint); |
| 447 else | |
| 2247 | 448 names = make_name_list (); |
| 1280 | 449 |
| 2944 | 450 // Sort and remove duplicates. |
| 2348 | 451 |
| 2944 | 452 names.qsort (true); |
| 2348 | 453 |
| 1280 | 454 return names; |
| 455 } | |
| 456 | |
| 3536 | 457 static std::string |
| 3523 | 458 generate_completion (const std::string& text, int state) |
| 1280 | 459 { |
| 3523 | 460 std::string retval; |
| 2944 | 461 |
| 3523 | 462 static std::string prefix; |
| 463 static std::string hint; | |
| 1280 | 464 |
| 2921 | 465 static size_t hint_len = 0; |
| 1280 | 466 |
| 1 | 467 static int list_index = 0; |
| 2921 | 468 static int name_list_len = 0; |
| 4604 | 469 static int name_list_total_len = 0; |
| 2247 | 470 static string_vector name_list; |
| 4604 | 471 static string_vector file_name_list; |
| 1 | 472 |
| 1280 | 473 static int matches = 0; |
| 1 | 474 |
| 475 if (state == 0) | |
| 476 { | |
| 477 list_index = 0; | |
| 478 | |
| 2921 | 479 prefix = ""; |
| 1280 | 480 |
| 2921 | 481 hint = text; |
| 1280 | 482 |
| 483 name_list = generate_possible_completions (text, prefix, hint); | |
| 484 | |
| 2921 | 485 name_list_len = name_list.length (); |
| 486 | |
| 4604 | 487 file_name_list = command_editor::generate_filename_completions (text); |
| 488 | |
| 489 name_list.append (file_name_list); | |
| 490 | |
| 491 name_list_total_len = name_list.length (); | |
| 492 | |
| 2921 | 493 hint_len = hint.length (); |
| 1280 | 494 |
| 495 matches = 0; | |
| 2247 | 496 |
| 2921 | 497 for (int i = 0; i < name_list_len; i++) |
| 3565 | 498 if (hint == name_list[i].substr (0, hint_len)) |
| 2247 | 499 matches++; |
| 1 | 500 } |
| 501 | |
| 4604 | 502 if (name_list_total_len > 0 && matches > 0) |
| 1 | 503 { |
| 4604 | 504 while (list_index < name_list_total_len) |
| 244 | 505 { |
| 3523 | 506 std::string name = name_list[list_index]; |
| 2247 | 507 |
| 1280 | 508 list_index++; |
| 2247 | 509 |
| 3565 | 510 if (hint == name.substr (0, hint_len)) |
| 1280 | 511 { |
| 4604 | 512 if (list_index <= name_list_len && ! prefix.empty ()) |
| 2944 | 513 retval = prefix + "." + name; |
| 514 else | |
| 515 retval = name; | |
| 1280 | 516 |
| 5775 | 517 // FIXME -- looks_like_struct is broken for now, |
| 4179 | 518 // so it always returns false. |
| 519 | |
| 6979 | 520 if (matches == 1 && looks_like_struct (retval)) |
| 4179 | 521 { |
| 522 // Don't append anything, since we don't know | |
| 523 // whether it should be '(' or '.'. | |
| 524 | |
| 525 command_editor::set_completion_append_character ('\0'); | |
| 526 } | |
| 527 else | |
| 528 command_editor::set_completion_append_character | |
| 529 (Vcompletion_append_char); | |
| 1280 | 530 |
| 2944 | 531 break; |
| 1280 | 532 } |
| 244 | 533 } |
| 1 | 534 } |
| 535 | |
| 2944 | 536 return retval; |
| 1 | 537 } |
| 538 | |
| 6979 | 539 static std::string |
| 540 quoting_filename (const std::string &text, int, char quote) | |
| 541 { | |
| 542 if (quote) | |
| 543 return text; | |
| 544 else | |
| 545 return (std::string ("'") + text); | |
| 546 } | |
| 547 | |
| 2927 | 548 void |
| 549 initialize_command_input (void) | |
| 550 { | |
| 551 // If we are using readline, this allows conditional parsing of the | |
| 552 // .inputrc file. | |
| 269 | 553 |
| 2927 | 554 command_editor::set_name ("Octave"); |
| 1358 | 555 |
| 5775 | 556 // FIXME -- this needs to include a comma too, but that |
| 3933 | 557 // causes trouble for the new struct element completion code. |
| 558 | |
| 4272 | 559 static const char *s = "\t\n !\"\'*+-/:;<=>(){}[\\]^`~"; |
| 3933 | 560 |
| 561 command_editor::set_basic_word_break_characters (s); | |
| 562 | |
| 563 command_editor::set_completer_word_break_characters (s); | |
| 564 | |
| 3004 | 565 command_editor::set_basic_quote_characters ("\""); |
| 2944 | 566 |
| 6979 | 567 command_editor::set_filename_quote_characters (" \t\n\\\"'@<>=;|&()#$`?*[!:{"); |
| 568 command_editor::set_completer_quote_characters ("'\""); | |
| 569 | |
| 2944 | 570 command_editor::set_completion_function (generate_completion); |
| 6979 | 571 |
| 572 command_editor::set_quoting_function (quoting_filename); | |
| 269 | 573 } |
| 574 | |
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575 static void |
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576 get_debug_input (const std::string& prompt) |
| 269 | 577 { |
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578 octave_user_code *caller = octave_call_stack::caller_user_code (); |
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579 std::string nm; |
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580 |
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581 if (caller) |
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582 { |
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583 nm = caller->fcn_file_name (); |
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584 |
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585 if (nm.empty ()) |
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586 nm = caller->name (); |
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587 |
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588 Vdebugging_current_line = octave_call_stack::current_line (); |
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589 } |
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590 else |
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591 Vdebugging_current_line = -1; |
| 3180 | 592 |
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593 std::ostringstream buf; |
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594 |
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595 if (! nm.empty ()) |
| 3180 | 596 { |
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597 if (Vgud_mode) |
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598 { |
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599 static char ctrl_z = 'Z' & 0x1f; |
| 269 | 600 |
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601 buf << ctrl_z << ctrl_z << nm << ":" << Vdebugging_current_line; |
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602 } |
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603 else |
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604 { |
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605 buf << "stopped in " << nm; |
| 1 | 606 |
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607 if (Vdebugging_current_line > 0) |
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608 buf << " at line " << Vdebugging_current_line; |
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609 } |
| 3180 | 610 } |
| 611 | |
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612 std::string msg = buf.str (); |
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613 |
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614 if (! msg.empty ()) |
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615 message (Vgud_mode ? 0 : "keyboard", msg.c_str ()); |
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616 |
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617 unwind_protect::begin_frame ("get_debug_input"); |
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618 |
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619 unwind_protect_str (VPS1); |
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620 VPS1 = prompt; |
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621 |
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622 while (Vdebugging) |
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623 { |
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624 reset_error_handler (); |
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625 |
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626 reset_parser (); |
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627 |
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628 // Save current value of global_command. |
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629 unwind_protect_ptr (global_command); |
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630 |
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631 // This is the same as yyparse in parse.y. |
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632 int retval = octave_parse (); |
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633 |
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634 if (retval == 0 && global_command) |
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635 { |
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636 global_command->eval (); |
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637 |
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638 // FIXME -- To avoid a memory leak, global_command should be |
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639 // deleted, I think. But doing that here causes trouble if |
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640 // an error occurs while executing a debugging command |
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641 // (dbstep, for example). It's not clear to me why that |
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642 // happens. |
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643 // |
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644 // delete global_command; |
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645 // |
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646 // global_command = 0; |
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647 |
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648 if (octave_completion_matches_called) |
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649 octave_completion_matches_called = false; |
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650 } |
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651 |
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652 // Restore previous value of global_command. |
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653 unwind_protect::run (); |
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654 |
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655 OCTAVE_QUIT; |
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656 } |
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657 |
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658 unwind_protect::run_frame ("get_debug_input"); |
| 529 | 659 } |
| 660 | |
| 581 | 661 // If the user simply hits return, this will produce an empty matrix. |
| 662 | |
| 2086 | 663 static octave_value_list |
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664 get_user_input (const octave_value_list& args, int nargout) |
| 529 | 665 { |
| 3100 | 666 octave_value_list retval; |
| 529 | 667 |
| 668 int nargin = args.length (); | |
| 669 | |
| 670 int read_as_string = 0; | |
| 671 | |
| 712 | 672 if (nargin == 2) |
| 529 | 673 read_as_string++; |
| 674 | |
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675 std::string prompt = args(0).string_value (); |
| 4975 | 676 |
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677 if (error_state) |
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678 { |
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679 error ("input: unrecognized argument"); |
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680 return retval; |
| 4975 | 681 } |
| 682 | |
| 2095 | 683 flush_octave_stdout (); |
| 529 | 684 |
| 4565 | 685 octave_diary << prompt; |
| 686 | |
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687 std::string input_buf = interactive_input (prompt.c_str (), true); |
| 529 | 688 |
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689 if (! (error_state || input_buf.empty ())) |
| 529 | 690 { |
| 1799 | 691 if (! input_from_startup_file) |
| 2927 | 692 command_history::add (input_buf); |
| 529 | 693 |
| 2927 | 694 size_t len = input_buf.length (); |
| 529 | 695 |
| 4565 | 696 octave_diary << input_buf; |
| 697 | |
| 698 if (input_buf[len - 1] != '\n') | |
| 699 octave_diary << "\n"; | |
| 700 | |
| 529 | 701 if (len < 1) |
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702 return read_as_string ? octave_value ("") : octave_value (Matrix ()); |
| 3772 | 703 |
| 704 if (read_as_string) | |
| 963 | 705 { |
| 5775 | 706 // FIXME -- fix gnu_readline and octave_gets instead! |
| 3081 | 707 if (input_buf.length () == 1 && input_buf[0] == '\n') |
| 3100 | 708 retval(0) = ""; |
| 3081 | 709 else |
| 3100 | 710 retval(0) = input_buf; |
| 963 | 711 } |
| 529 | 712 else |
| 713 { | |
| 714 int parse_status = 0; | |
| 2900 | 715 |
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716 retval = eval_string (input_buf, true, parse_status, nargout); |
| 3100 | 717 |
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718 if (! Vdebugging && retval.length () == 0) |
| 3100 | 719 retval(0) = Matrix (); |
| 529 | 720 } |
| 721 } | |
| 722 else | |
| 723 error ("input: reading user-input failed!"); | |
| 724 | |
| 725 return retval; | |
| 726 } | |
| 727 | |
| 3100 | 728 DEFUN (input, args, nargout, |
| 3372 | 729 "-*- texinfo -*-\n\ |
| 730 @deftypefn {Built-in Function} {} input (@var{prompt})\n\ | |
| 731 @deftypefnx {Built-in Function} {} input (@var{prompt}, \"s\")\n\ | |
| 732 Print a prompt and wait for user input. For example,\n\ | |
| 733 \n\ | |
| 734 @example\n\ | |
| 735 input (\"Pick a number, any number! \")\n\ | |
| 736 @end example\n\ | |
| 737 \n\ | |
| 738 @noindent\n\ | |
| 739 prints the prompt\n\ | |
| 740 \n\ | |
| 741 @example\n\ | |
| 742 Pick a number, any number!\n\ | |
| 743 @end example\n\ | |
| 529 | 744 \n\ |
| 3372 | 745 @noindent\n\ |
| 746 and waits for the user to enter a value. The string entered by the user\n\ | |
| 747 is evaluated as an expression, so it may be a literal constant, a\n\ | |
| 748 variable name, or any other valid expression.\n\ | |
| 749 \n\ | |
| 750 Currently, @code{input} only returns one value, regardless of the number\n\ | |
| 751 of values produced by the evaluation of the expression.\n\ | |
| 752 \n\ | |
| 753 If you are only interested in getting a literal string value, you can\n\ | |
| 754 call @code{input} with the character string @code{\"s\"} as the second\n\ | |
| 755 argument. This tells Octave to return the string entered by the user\n\ | |
| 756 directly, without evaluating it first.\n\ | |
| 757 \n\ | |
| 758 Because there may be output waiting to be displayed by the pager, it is\n\ | |
| 759 a good idea to always call @code{fflush (stdout)} before calling\n\ | |
| 760 @code{input}. This will ensure that all pending output is written to\n\ | |
| 761 the screen before your prompt. @xref{Input and Output}.\n\ | |
| 762 @end deftypefn") | |
| 529 | 763 { |
| 2086 | 764 octave_value_list retval; |
| 529 | 765 |
| 766 int nargin = args.length (); | |
| 767 | |
| 712 | 768 if (nargin == 1 || nargin == 2) |
|
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769 retval = get_user_input (args, nargout); |
| 529 | 770 else |
| 5823 | 771 print_usage (); |
| 529 | 772 |
| 773 return retval; | |
| 774 } | |
| 775 | |
| 5640 | 776 bool |
| 777 octave_yes_or_no (const std::string& prompt) | |
| 778 { | |
| 779 std::string prompt_string = prompt + "(yes or no) "; | |
| 780 | |
| 781 while (1) | |
| 782 { | |
|
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783 std::string input_buf = interactive_input (prompt_string, true); |
| 5640 | 784 |
| 785 if (input_buf == "yes") | |
| 786 return true; | |
| 787 else if (input_buf == "no") | |
| 788 return false; | |
| 789 else | |
| 790 message (0, "Please answer yes or no."); | |
| 791 } | |
| 792 } | |
| 793 | |
| 794 DEFUN (yes_or_no, args, , | |
| 795 "-*- texinfo -*-\n\ | |
| 796 @deftypefn {Built-in Function} {} yes_or_no (@var{prompt})\n\ | |
| 797 Ask the user a yes-or-no question. Return 1 if the answer is yes.\n\ | |
| 798 Takes one argument, which is the string to display to ask the\n\ | |
| 799 question. It should end in a space; @samp{yes-or-no-p} adds\n\ | |
| 800 @samp{(yes or no) } to it. The user must confirm the answer with\n\ | |
| 801 RET and can edit it until it has been confirmed.\n\ | |
| 802 @end deftypefn") | |
| 803 { | |
| 804 octave_value retval; | |
| 805 | |
| 806 int nargin = args.length (); | |
| 807 | |
| 808 if (nargin == 0 || nargin == 1) | |
| 809 { | |
| 810 std::string prompt; | |
| 811 | |
| 812 if (nargin == 1) | |
| 813 { | |
| 814 prompt = args(0).string_value (); | |
| 815 | |
| 816 if (error_state) | |
| 817 { | |
| 818 error ("yes_or_no: expecting argument to be character string"); | |
| 819 return retval; | |
| 820 } | |
| 821 } | |
| 822 | |
| 823 retval = octave_yes_or_no (prompt); | |
| 824 } | |
| 825 else | |
| 5823 | 826 print_usage (); |
| 5640 | 827 |
| 828 return retval; | |
| 829 } | |
| 830 | |
| 3098 | 831 static void |
| 832 restore_command_history (void *) | |
| 833 { | |
| 834 command_history::ignore_entries (! Vsaving_history); | |
| 835 } | |
| 836 | |
|
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837 static size_t saved_frame = 0; |
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838 |
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839 static void |
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840 restore_frame (void *) |
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841 { |
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842 octave_call_stack::goto_frame (saved_frame); |
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843 } |
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844 |
| 3707 | 845 octave_value |
| 846 do_keyboard (const octave_value_list& args) | |
| 847 { | |
| 848 octave_value retval; | |
| 849 | |
| 850 int nargin = args.length (); | |
| 851 | |
| 852 assert (nargin == 0 || nargin == 1); | |
| 853 | |
| 854 unwind_protect::begin_frame ("do_keyboard"); | |
| 855 | |
| 5775 | 856 // FIXME -- we shouldn't need both the |
| 3707 | 857 // command_history object and the |
| 858 // Vsaving_history variable... | |
| 859 command_history::ignore_entries (false); | |
| 860 | |
| 861 unwind_protect::add (restore_command_history, 0); | |
| 862 | |
| 863 unwind_protect_bool (Vsaving_history); | |
|
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864 unwind_protect_bool (Vdebugging); |
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865 |
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866 saved_frame = octave_call_stack::current_frame (); |
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867 unwind_protect::add (restore_frame); |
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868 unwind_protect_size_t (saved_frame); |
| 3707 | 869 |
| 870 Vsaving_history = true; | |
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871 Vdebugging = true; |
| 3707 | 872 |
|
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873 std::string prompt = "debug> "; |
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874 if (nargin > 0) |
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875 prompt = args(0).string_value (); |
| 4233 | 876 |
|
7787
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877 if (! error_state) |
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878 get_debug_input (prompt); |
| 3707 | 879 |
| 880 unwind_protect::run_frame ("do_keyboard"); | |
| 881 | |
| 882 return retval; | |
| 883 } | |
| 884 | |
| 1957 | 885 DEFUN (keyboard, args, , |
| 3372 | 886 "-*- texinfo -*-\n\ |
| 887 @deftypefn {Built-in Function} {} keyboard (@var{prompt})\n\ | |
| 888 This function is normally used for simple debugging. When the\n\ | |
| 889 @code{keyboard} function is executed, Octave prints a prompt and waits\n\ | |
| 890 for user input. The input strings are then evaluated and the results\n\ | |
| 891 are printed. This makes it possible to examine the values of variables\n\ | |
| 892 within a function, and to assign new values to variables. No value is\n\ | |
| 893 returned from the @code{keyboard} function, and it continues to prompt\n\ | |
| 894 for input until the user types @samp{quit}, or @samp{exit}.\n\ | |
| 529 | 895 \n\ |
| 3372 | 896 If @code{keyboard} is invoked without any arguments, a default prompt of\n\ |
| 897 @samp{debug> } is used.\n\ | |
| 898 @end deftypefn") | |
| 529 | 899 { |
| 2086 | 900 octave_value_list retval; |
| 529 | 901 |
| 902 int nargin = args.length (); | |
| 903 | |
| 712 | 904 if (nargin == 0 || nargin == 1) |
|
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905 { |
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906 saved_frame = octave_call_stack::current_frame (); |
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907 unwind_protect::add (restore_frame); |
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908 unwind_protect_size_t (saved_frame); |
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909 |
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910 // Skip the frame assigned to the keyboard function. |
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911 octave_call_stack::goto_frame (1); |
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912 |
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913 do_keyboard (args); |
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914 |
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915 unwind_protect::run (); |
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916 } |
| 529 | 917 else |
| 5823 | 918 print_usage (); |
| 529 | 919 |
| 920 return retval; | |
| 921 } | |
| 922 | |
| 4208 | 923 DEFCMD (echo, args, , |
| 3332 | 924 "-*- texinfo -*-\n\ |
| 925 @deffn {Command} echo options\n\ | |
| 926 Control whether commands are displayed as they are executed. Valid\n\ | |
| 927 options are:\n\ | |
| 1588 | 928 \n\ |
| 3332 | 929 @table @code\n\ |
| 930 @item on\n\ | |
| 931 Enable echoing of commands as they are executed in script files.\n\ | |
| 932 \n\ | |
| 933 @item off\n\ | |
| 934 Disable echoing of commands as they are executed in script files.\n\ | |
| 1588 | 935 \n\ |
| 3332 | 936 @item on all\n\ |
| 937 Enable echoing of commands as they are executed in script files and\n\ | |
| 938 functions.\n\ | |
| 1588 | 939 \n\ |
| 3332 | 940 @item off all\n\ |
| 941 Disable echoing of commands as they are executed in script files and\n\ | |
| 942 functions.\n\ | |
| 943 @end table\n\ | |
| 944 \n\ | |
| 945 @noindent\n\ | |
| 946 If invoked without any arguments, @code{echo} toggles the current echo\n\ | |
| 947 state.\n\ | |
| 3333 | 948 @end deffn") |
| 1588 | 949 { |
| 2086 | 950 octave_value_list retval; |
| 1588 | 951 |
| 1755 | 952 int argc = args.length () + 1; |
| 953 | |
| 1968 | 954 string_vector argv = args.make_argv ("echo"); |
| 1755 | 955 |
| 956 if (error_state) | |
| 957 return retval; | |
| 1588 | 958 |
| 959 switch (argc) | |
| 960 { | |
| 961 case 1: | |
| 962 { | |
| 2205 | 963 if ((Vecho_executing_commands & ECHO_SCRIPTS) |
| 964 || (Vecho_executing_commands & ECHO_FUNCTIONS)) | |
| 5794 | 965 Vecho_executing_commands = ECHO_OFF; |
| 1588 | 966 else |
| 5794 | 967 Vecho_executing_commands = ECHO_SCRIPTS; |
| 1588 | 968 } |
| 969 break; | |
| 970 | |
| 971 case 2: | |
| 972 { | |
| 3523 | 973 std::string arg = argv[1]; |
| 1755 | 974 |
| 975 if (arg == "on") | |
| 5794 | 976 Vecho_executing_commands = ECHO_SCRIPTS; |
| 1755 | 977 else if (arg == "off") |
| 5794 | 978 Vecho_executing_commands = ECHO_OFF; |
| 1588 | 979 else |
| 5823 | 980 print_usage (); |
| 1588 | 981 } |
| 982 break; | |
| 983 | |
| 984 case 3: | |
| 985 { | |
| 3523 | 986 std::string arg = argv[1]; |
| 1755 | 987 |
| 988 if (arg == "on" && argv[2] == "all") | |
| 2800 | 989 { |
| 990 int tmp = (ECHO_SCRIPTS | ECHO_FUNCTIONS); | |
| 5794 | 991 Vecho_executing_commands = tmp; |
| 2800 | 992 } |
| 1755 | 993 else if (arg == "off" && argv[2] == "all") |
| 5794 | 994 Vecho_executing_commands = ECHO_OFF; |
| 1588 | 995 else |
| 5823 | 996 print_usage (); |
| 1588 | 997 } |
| 998 break; | |
| 999 | |
| 1000 default: | |
| 5823 | 1001 print_usage (); |
| 1588 | 1002 break; |
| 1003 } | |
| 1004 | |
| 1005 return retval; | |
| 1006 } | |
| 1007 | |
| 2234 | 1008 DEFUN (completion_matches, args, nargout, |
| 3332 | 1009 "-*- texinfo -*-\n\ |
| 1010 @deftypefn {Built-in Function} {} completion_matches (@var{hint})\n\ | |
| 1011 Generate possible completions given @var{hint}.\n\ | |
| 2299 | 1012 \n\ |
| 1013 This function is provided for the benefit of programs like Emacs which\n\ | |
| 3332 | 1014 might be controlling Octave and handling user input. The current\n\ |
| 1015 command number is not incremented when this function is called. This is\n\ | |
| 1016 a feature, not a bug.\n\ | |
| 3333 | 1017 @end deftypefn") |
| 2234 | 1018 { |
| 2281 | 1019 octave_value retval; |
| 2234 | 1020 |
| 1021 int nargin = args.length (); | |
| 1022 | |
| 1023 if (nargin == 1) | |
| 1024 { | |
| 3523 | 1025 std::string hint = args(0).string_value (); |
| 2234 | 1026 |
| 1027 if (! error_state) | |
| 1028 { | |
| 1029 int n = 32; | |
| 1030 | |
| 1031 string_vector list (n); | |
| 1032 | |
| 1033 int k = 0; | |
| 1034 | |
| 1035 for (;;) | |
| 1036 { | |
| 3523 | 1037 std::string cmd = generate_completion (hint, k); |
| 2234 | 1038 |
| 2944 | 1039 if (! cmd.empty ()) |
| 2234 | 1040 { |
| 2944 | 1041 if (k == n) |
| 2234 | 1042 { |
| 2944 | 1043 n *= 2; |
| 1044 list.resize (n); | |
| 1045 } | |
| 2235 | 1046 |
| 2944 | 1047 list[k++] = cmd; |
| 2234 | 1048 } |
| 1049 else | |
| 1050 { | |
| 1051 list.resize (k); | |
| 1052 break; | |
| 1053 } | |
| 1054 } | |
| 1055 | |
| 1056 if (nargout > 0) | |
| 2281 | 1057 { |
| 1058 if (! list.empty ()) | |
| 1059 retval = list; | |
| 2282 | 1060 else |
| 1061 retval = ""; | |
| 2281 | 1062 } |
| 2234 | 1063 else |
| 1064 { | |
| 2235 | 1065 // We don't use string_vector::list_in_columns here |
| 1066 // because it will be easier for Emacs if the names | |
| 1067 // appear in a single column. | |
| 1068 | |
| 2234 | 1069 int len = list.length (); |
| 1070 | |
| 1071 for (int i = 0; i < len; i++) | |
| 1072 octave_stdout << list[i] << "\n"; | |
| 1073 } | |
| 2299 | 1074 |
| 1075 octave_completion_matches_called = true; | |
| 2234 | 1076 } |
| 1077 } | |
| 1078 else | |
| 5823 | 1079 print_usage (); |
| 2234 | 1080 |
| 1081 return retval; | |
| 1082 } | |
| 1083 | |
| 3189 | 1084 DEFUN (read_readline_init_file, args, , |
| 3448 | 1085 "-*- texinfo -*-\n\ |
| 1086 @deftypefn {Built-in Function} {} read_readline_init_file (@var{file})\n\ | |
| 7007 | 1087 Read the readline library initialization file @var{file}. If\n\ |
| 3448 | 1088 @var{file} is omitted, read the default initialization file (normally\n\ |
| 6615 | 1089 @file{~/.inputrc}).\n\ |
| 1090 \n\ | |
| 1091 @xref{Readline Init File, , , readline, GNU Readline Library},\n\ | |
| 1092 for details.\n\ | |
| 3448 | 1093 @end deftypefn") |
| 3189 | 1094 { |
| 1095 octave_value_list retval; | |
| 1096 | |
| 1097 int nargin = args.length (); | |
| 1098 | |
| 1099 if (nargin == 0) | |
| 1100 command_editor::read_init_file (); | |
| 1101 else if (nargin == 1) | |
| 1102 { | |
| 5872 | 1103 std::string file = args(0).string_value (); |
| 3189 | 1104 |
| 1105 if (! error_state) | |
| 1106 command_editor::read_init_file (file); | |
| 1107 } | |
| 1108 else | |
| 5823 | 1109 print_usage (); |
| 3189 | 1110 |
| 1111 return retval; | |
| 1112 } | |
| 1113 | |
|
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1114 DEFUN (re_read_readline_init_file, args, , |
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1115 "-*- texinfo -*-\n\ |
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1116 @deftypefn {Built-in Function} {} re_read_readline_init_file ()\n\ |
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1117 Re-read the last readline library initialization file that was read.\n\ |
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1118 @xref{Readline Init File, , , readline, GNU Readline Library},\n\ |
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1119 for details.\n\ |
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1120 @end deftypefn") |
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1121 { |
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1122 octave_value_list retval; |
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1123 |
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1124 if (args.length () == 0) |
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1125 command_editor::re_read_init_file (); |
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1126 else |
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1127 print_usage (); |
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1128 |
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1129 return retval; |
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1130 } |
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1131 |
| 3523 | 1132 static std::string hook_fcn; |
| 3498 | 1133 static octave_value user_data; |
| 1134 | |
| 4802 | 1135 static int |
| 3519 | 1136 input_event_hook (void) |
| 3498 | 1137 { |
| 4526 | 1138 if (is_valid_function (hook_fcn)) |
| 1139 { | |
| 1140 if (user_data.is_defined ()) | |
| 1141 feval (hook_fcn, user_data, 0); | |
| 1142 else | |
| 1143 feval (hook_fcn, octave_value_list (), 0); | |
| 1144 } | |
| 3498 | 1145 else |
| 4526 | 1146 { |
| 1147 hook_fcn = std::string (); | |
| 1148 user_data = octave_value (); | |
| 1149 | |
| 6913 | 1150 command_editor::remove_event_hook (input_event_hook); |
| 4802 | 1151 } |
| 1152 | |
| 1153 return 0; | |
| 3498 | 1154 } |
| 1155 | |
| 1156 DEFUN (input_event_hook, args, , | |
| 1157 "-*- texinfo -*-\n\ | |
| 1158 @deftypefn {Built-in Function} {[@var{ofcn}, @var{odata}] =} input_event_hook (@var{fcn}, @var{data})\n\ | |
| 1159 Given the name of a function as a string and any Octave value object,\n\ | |
| 1160 install @var{fcn} as a function to call periodically, when Octave is\n\ | |
| 1161 waiting for input. The function should have the form\n\ | |
| 1162 @example\n\ | |
| 1163 @var{fcn} (@var{data})\n\ | |
| 1164 @end example\n\ | |
| 1165 \n\ | |
| 1166 If @var{data} is omitted, Octave calls the function without any\n\ | |
| 1167 arguments. If both @var{fcn} and @var{data} are omitted, Octave\n\ | |
| 1168 clears the hook. In all cases, the name of the previous hook function\n\ | |
| 1169 and the user data are returned.\n\ | |
| 1170 @end deftypefn") | |
| 1171 { | |
| 1172 octave_value_list retval; | |
| 1173 | |
| 1174 int nargin = args.length (); | |
| 1175 | |
| 1176 if (nargin > 2) | |
| 5823 | 1177 print_usage (); |
| 3498 | 1178 else |
| 1179 { | |
| 1180 octave_value tmp_user_data; | |
| 1181 | |
| 3523 | 1182 std::string tmp_hook_fcn; |
| 3498 | 1183 |
| 1184 if (nargin > 1) | |
| 1185 tmp_user_data = args(1); | |
| 1186 | |
| 1187 if (nargin > 0) | |
| 1188 { | |
| 1189 tmp_hook_fcn = args(0).string_value (); | |
| 1190 | |
| 1191 if (error_state) | |
| 1192 { | |
| 1193 error ("input_event_hook: expecting string as first arg"); | |
| 1194 return retval; | |
| 1195 } | |
| 1196 | |
| 6913 | 1197 command_editor::add_event_hook (input_event_hook); |
| 3498 | 1198 } |
| 1199 | |
| 1200 if (nargin == 0) | |
| 6913 | 1201 command_editor::remove_event_hook (input_event_hook); |
| 3498 | 1202 |
| 1203 retval(1) = user_data; | |
| 1204 retval(0) = hook_fcn; | |
| 1205 | |
| 1206 hook_fcn = tmp_hook_fcn; | |
| 1207 user_data = tmp_user_data; | |
| 1208 } | |
| 1209 | |
| 1210 return retval; | |
| 1211 } | |
| 1212 | |
| 5794 | 1213 DEFUN (PS1, args, nargout, |
| 1214 "-*- texinfo -*-\n\ | |
| 1215 @deftypefn {Built-in Function} {@var{val} =} PS1 ()\n\ | |
| 1216 @deftypefnx {Built-in Function} {@var{old_val} =} PS1 (@var{new_val})\n\ | |
| 1217 Query or set the primary prompt string. When executing interactively,\n\ | |
| 1218 Octave displays the primary prompt when it is ready to read a command.\n\ | |
| 3332 | 1219 \n\ |
| 5794 | 1220 The default value of the primary prompt string is @code{\"\\s:\\#> \"}.\n\ |
| 1221 To change it, use a command like\n\ | |
| 3332 | 1222 \n\ |
| 1223 @example\n\ | |
| 7097 | 1224 octave:13> PS1 (\"\\\\u@@\\\\H> \")\n\ |
| 3332 | 1225 @end example\n\ |
| 1226 \n\ | |
| 1227 @noindent\n\ | |
| 1228 which will result in the prompt @samp{boris@@kremvax> } for the user\n\ | |
| 1229 @samp{boris} logged in on the host @samp{kremvax.kgb.su}. Note that two\n\ | |
| 5794 | 1230 backslashes are required to enter a backslash into a double-quoted\n\ |
| 1231 character string.\n\ | |
| 3332 | 1232 @xref{Strings}.\n\ |
| 6373 | 1233 @seealso{PS2, PS4}\n\ |
| 5794 | 1234 @end deftypefn") |
| 1235 { | |
| 1236 return SET_INTERNAL_VARIABLE (PS1); | |
| 1237 } | |
| 2181 | 1238 |
| 5794 | 1239 DEFUN (PS2, args, nargout, |
| 1240 "-*- texinfo -*-\n\ | |
| 1241 @deftypefn {Built-in Function} {@var{val} =} PS2 ()\n\ | |
| 1242 @deftypefnx {Built-in Function} {@var{old_val} =} PS2 (@var{new_val})\n\ | |
| 1243 Query or set the secondary prompt string. The secondary prompt is\n\ | |
| 1244 printed when Octave is expecting additional input to complete a\n\ | |
| 1245 command. For example, if you are typing a for loop that spans several\n\ | |
| 1246 lines, Octave will print the secondary prompt at the beginning of\n\ | |
| 1247 each line after the first. The default value of the secondary prompt\n\ | |
| 1248 string is @code{\"> \"}.\n\ | |
| 1249 @seealso{PS1, PS4}\n\ | |
| 1250 @end deftypefn") | |
| 1251 { | |
| 1252 return SET_INTERNAL_VARIABLE (PS2); | |
| 1253 } | |
| 2181 | 1254 |
| 5794 | 1255 DEFUN (PS4, args, nargout, |
| 1256 "-*- texinfo -*-\n\ | |
| 1257 @deftypefn {Built-in Function} {@var{val} =} PS4 ()\n\ | |
| 1258 @deftypefnx {Built-in Function} {@var{old_val} =} PS4 (@var{new_val})\n\ | |
| 1259 Query or set the character string used to prefix output produced\n\ | |
| 1260 when echoing commands when @code{echo_executing_commands} is enabled.\n\ | |
| 6620 | 1261 The default value is @code{\"+ \"}.\n\ |
| 1262 @xref{Invoking Octave from the Command Line}, for a description of\n\ | |
| 1263 @code{--echo-commands}.\n\ | |
| 5794 | 1264 @seealso{echo_executing_commands, PS1, PS2}\n\ |
| 1265 @end deftypefn") | |
| 1266 { | |
| 1267 return SET_INTERNAL_VARIABLE (PS4); | |
| 1268 } | |
| 2181 | 1269 |
| 5794 | 1270 DEFUN (completion_append_char, args, nargout, |
| 1271 "-*- texinfo -*-\n\ | |
| 1272 @deftypefn {Built-in Function} {@var{val} =} completion_append_char ()\n\ | |
| 1273 @deftypefnx {Built-in Function} {@var{old_val} =} completion_append_char (@var{new_val})\n\ | |
| 1274 Query or set the internal character variable that is appended to\n\ | |
| 1275 successful command-line completion attempts. The default\n\ | |
| 3332 | 1276 value is @code{\" \"} (a single space).\n\ |
| 5794 | 1277 @end deftypefn") |
| 1278 { | |
| 1279 return SET_INTERNAL_VARIABLE (completion_append_char); | |
| 1280 } | |
| 3019 | 1281 |
| 5794 | 1282 DEFUN (echo_executing_commands, args, nargout, |
| 1283 "-*- texinfo -*-\n\ | |
| 1284 @deftypefn {Built-in Function} {@var{val} =} echo_executing_commands ()\n\ | |
| 1285 @deftypefnx {Built-in Function} {@var{old_val} =} echo_executing_commands (@var{new_val})\n\ | |
| 1286 Query or set the internal variable that controls the echo state.\n\ | |
| 1287 It may be the sum of the following values:\n\ | |
| 3332 | 1288 \n\ |
| 1289 @table @asis\n\ | |
| 1290 @item 1\n\ | |
| 1291 Echo commands read from script files.\n\ | |
| 1292 \n\ | |
| 1293 @item 2\n\ | |
| 1294 Echo commands from functions.\n\ | |
| 1295 \n\ | |
| 1296 @item 4\n\ | |
| 1297 Echo commands read from command line.\n\ | |
| 1298 @end table\n\ | |
| 1299 \n\ | |
| 1300 More than one state can be active at once. For example, a value of 3 is\n\ | |
| 1301 equivalent to the command @kbd{echo on all}.\n\ | |
| 1302 \n\ | |
| 1303 The value of @code{echo_executing_commands} is set by the @kbd{echo}\n\ | |
| 1304 command and the command line option @code{--echo-input}.\n\ | |
| 5794 | 1305 @end deftypefn") |
| 1306 { | |
| 1307 return SET_INTERNAL_VARIABLE (echo_executing_commands); | |
| 2181 | 1308 } |
| 1309 | |
| 6257 | 1310 DEFUN (__request_drawnow__, args, , |
| 1311 "-*- texinfo -*-\n\ | |
| 1312 @deftypefn {Built-in Function} {} __request_drawnow__ ()\n\ | |
| 1313 @deftypefnx {Built-in Function} {} __request_drawnow__ (@var{flag})\n\ | |
| 6945 | 1314 Undocumented internal function.\n\ |
| 6257 | 1315 @end deftypefn") |
| 1316 { | |
| 1317 octave_value retval; | |
| 1318 | |
| 1319 int nargin = args.length (); | |
| 1320 | |
| 1321 if (nargin == 0) | |
| 1322 Vdrawnow_requested = true; | |
| 1323 else if (nargin == 1) | |
| 1324 Vdrawnow_requested = args(0).bool_value (); | |
| 1325 else | |
| 1326 print_usage (); | |
| 1327 | |
| 1328 return retval; | |
| 1329 } | |
| 1330 | |
| 7294 | 1331 DEFUN (__gud_mode__, args, , |
| 1332 "-*- texinfo -*-\n\ | |
| 1333 @deftypefn {Built-in Function} {} __gud_mode__ ()\n\ | |
| 1334 Undocumented internal function.\n\ | |
| 1335 @end deftypefn") | |
| 1336 { | |
| 1337 octave_value retval; | |
| 1338 | |
| 1339 int nargin = args.length (); | |
| 1340 | |
| 1341 if (nargin == 0) | |
| 1342 retval = Vgud_mode; | |
| 1343 else if (nargin == 1) | |
| 1344 Vgud_mode = args(0).bool_value (); | |
| 1345 else | |
| 1346 print_usage (); | |
| 1347 | |
| 1348 return retval; | |
| 1349 } | |
| 1350 | |
|
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1351 DEFUN (filemarker, args, nargout, |
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1352 "-*- texinfo -*-\n\ |
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1353 @deftypefn {Built-in Function} {} filemarker ()\n\ |
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1354 Returns or sets the character used to separate filename from the\n\ |
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1355 the subfunction names contained within the file. This can be used in\n\ |
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1356 a generic manner to interact with subfunctions. For example\n\ |
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1357 \n\ |
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1358 @example\n\ |
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1359 help ([\"myfunc\", filemarker, \"mysubfunc\"])\n\ |
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1360 @end example\n\ |
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1361 \n\ |
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1362 @noindent\n\ |
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1363 returns the help string associated with the sub-function @code{mysubfunc}\n\ |
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1364 of the function @code{myfunc}. Another use of @code{filemarker} is when\n\ |
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1365 debugging it allows easier placement of breakpoints within sub-functions.\n\ |
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1366 For example\n\ |
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1367 \n\ |
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1368 @example\n\ |
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1369 dbstop ([\"myfunc\", filemarker, \"mysubfunc\"])\n\ |
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1370 @end example\n\ |
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1371 \n\ |
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1372 @noindent\n\ |
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1373 will set a breakpoint at the first line of the subfunction @code{mysubfunc}.\n\ |
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1374 @end deftypefn") |
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1375 { |
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1376 char tmp = Vfilemarker; |
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1377 octave_value retval = SET_INTERNAL_VARIABLE (filemarker); |
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1378 |
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1379 // The character passed must not be a legal character for a function name |
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1380 if (! error_state && (::isalnum (Vfilemarker) || Vfilemarker == '_')) |
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1381 { |
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1382 Vfilemarker = tmp; |
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1383 error ("filemarker: character can not be a valid character for a function name"); |
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1384 } |
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1385 |
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1386 return retval; |
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1387 } |
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1388 |
| 1 | 1389 /* |
| 1390 ;;; Local Variables: *** | |
| 1391 ;;; mode: C++ *** | |
| 1392 ;;; End: *** | |
| 1393 */ |