| 1 | /* readline.c -- a general facility for reading lines of input |
| 2 | with emacs style editing and completion. */ |
| 3 | |
| 4 | /* Copyright (C) 1987-2017 Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of the GNU Readline Library (Readline), a library |
| 7 | for reading lines of text with interactive input and history editing. |
| 8 | |
| 9 | Readline is free software: you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation, either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | Readline is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with Readline. If not, see <http://www.gnu.org/licenses/>. |
| 21 | */ |
| 22 | |
| 23 | #define READLINE_LIBRARY |
| 24 | |
| 25 | #if defined (HAVE_CONFIG_H) |
| 26 | # include <config.h> |
| 27 | #endif |
| 28 | |
| 29 | #include <sys/types.h> |
| 30 | #include "posixstat.h" |
| 31 | #include <fcntl.h> |
| 32 | #if defined (HAVE_SYS_FILE_H) |
| 33 | # include <sys/file.h> |
| 34 | #endif /* HAVE_SYS_FILE_H */ |
| 35 | |
| 36 | #if defined (HAVE_UNISTD_H) |
| 37 | # include <unistd.h> |
| 38 | #endif /* HAVE_UNISTD_H */ |
| 39 | |
| 40 | #if defined (HAVE_STDLIB_H) |
| 41 | # include <stdlib.h> |
| 42 | #else |
| 43 | # include "ansi_stdlib.h" |
| 44 | #endif /* HAVE_STDLIB_H */ |
| 45 | |
| 46 | #if defined (HAVE_LOCALE_H) |
| 47 | # include <locale.h> |
| 48 | #endif |
| 49 | |
| 50 | #include <stdio.h> |
| 51 | #include "posixjmp.h" |
| 52 | #include <errno.h> |
| 53 | |
| 54 | #if !defined (errno) |
| 55 | extern int errno; |
| 56 | #endif /* !errno */ |
| 57 | |
| 58 | /* System-specific feature definitions and include files. */ |
| 59 | #include "rldefs.h" |
| 60 | #include "rlmbutil.h" |
| 61 | |
| 62 | #if defined (__EMX__) |
| 63 | # define INCL_DOSPROCESS |
| 64 | # include <os2.h> |
| 65 | #endif /* __EMX__ */ |
| 66 | |
| 67 | /* Some standard library routines. */ |
| 68 | #include "readline.h" |
| 69 | #include "history.h" |
| 70 | |
| 71 | #include "rlprivate.h" |
| 72 | #include "rlshell.h" |
| 73 | #include "xmalloc.h" |
| 74 | |
| 75 | #ifndef RL_LIBRARY_VERSION |
| 76 | # define RL_LIBRARY_VERSION "5.1" |
| 77 | #endif |
| 78 | |
| 79 | #ifndef RL_READLINE_VERSION |
| 80 | # define RL_READLINE_VERSION 0x0501 |
| 81 | #endif |
| 82 | |
| 83 | extern void _rl_free_history_entry PARAMS((HIST_ENTRY *)); |
| 84 | |
| 85 | #if defined (COLOR_SUPPORT) |
| 86 | extern void _rl_parse_colors PARAMS((void)); /* XXX */ |
| 87 | #endif |
| 88 | |
| 89 | |
| 90 | /* Forward declarations used in this file. */ |
| 91 | static char *readline_internal PARAMS((void)); |
| 92 | static void readline_initialize_everything PARAMS((void)); |
| 93 | |
| 94 | static void bind_arrow_keys_internal PARAMS((Keymap)); |
| 95 | static void bind_arrow_keys PARAMS((void)); |
| 96 | |
| 97 | static void bind_bracketed_paste_prefix PARAMS((void)); |
| 98 | |
| 99 | static void readline_default_bindings PARAMS((void)); |
| 100 | static void reset_default_bindings PARAMS((void)); |
| 101 | |
| 102 | static int _rl_subseq_result PARAMS((int, Keymap, int, int)); |
| 103 | static int _rl_subseq_getchar PARAMS((int)); |
| 104 | |
| 105 | /* **************************************************************** */ |
| 106 | /* */ |
| 107 | /* Line editing input utility */ |
| 108 | /* */ |
| 109 | /* **************************************************************** */ |
| 110 | |
| 111 | const char *rl_library_version = RL_LIBRARY_VERSION; |
| 112 | |
| 113 | int rl_readline_version = RL_READLINE_VERSION; |
| 114 | |
| 115 | /* True if this is `real' readline as opposed to some stub substitute. */ |
| 116 | int rl_gnu_readline_p = 1; |
| 117 | |
| 118 | /* A pointer to the keymap that is currently in use. |
| 119 | By default, it is the standard emacs keymap. */ |
| 120 | Keymap _rl_keymap = emacs_standard_keymap; |
| 121 | |
| 122 | /* The current style of editing. */ |
| 123 | int rl_editing_mode = emacs_mode; |
| 124 | |
| 125 | /* The current insert mode: input (the default) or overwrite */ |
| 126 | int rl_insert_mode = RL_IM_DEFAULT; |
| 127 | |
| 128 | /* Non-zero if we called this function from _rl_dispatch(). It's present |
| 129 | so functions can find out whether they were called from a key binding |
| 130 | or directly from an application. */ |
| 131 | int rl_dispatching; |
| 132 | |
| 133 | /* Non-zero if the previous command was a kill command. */ |
| 134 | int _rl_last_command_was_kill = 0; |
| 135 | |
| 136 | /* The current value of the numeric argument specified by the user. */ |
| 137 | int rl_numeric_arg = 1; |
| 138 | |
| 139 | /* Non-zero if an argument was typed. */ |
| 140 | int rl_explicit_arg = 0; |
| 141 | |
| 142 | /* Temporary value used while generating the argument. */ |
| 143 | int rl_arg_sign = 1; |
| 144 | |
| 145 | /* Non-zero means we have been called at least once before. */ |
| 146 | static int rl_initialized; |
| 147 | |
| 148 | #if 0 |
| 149 | /* If non-zero, this program is running in an EMACS buffer. */ |
| 150 | static int running_in_emacs; |
| 151 | #endif |
| 152 | |
| 153 | /* Flags word encapsulating the current readline state. */ |
| 154 | unsigned long rl_readline_state = RL_STATE_NONE; |
| 155 | |
| 156 | /* The current offset in the current input line. */ |
| 157 | int rl_point; |
| 158 | |
| 159 | /* Mark in the current input line. */ |
| 160 | int rl_mark; |
| 161 | |
| 162 | /* Length of the current input line. */ |
| 163 | int rl_end; |
| 164 | |
| 165 | /* Make this non-zero to return the current input_line. */ |
| 166 | int rl_done; |
| 167 | |
| 168 | /* The last function executed by readline. */ |
| 169 | rl_command_func_t *rl_last_func = (rl_command_func_t *)NULL; |
| 170 | |
| 171 | /* Top level environment for readline_internal (). */ |
| 172 | procenv_t _rl_top_level; |
| 173 | |
| 174 | /* The streams we interact with. */ |
| 175 | FILE *_rl_in_stream, *_rl_out_stream; |
| 176 | |
| 177 | /* The names of the streams that we do input and output to. */ |
| 178 | FILE *rl_instream = (FILE *)NULL; |
| 179 | FILE *rl_outstream = (FILE *)NULL; |
| 180 | |
| 181 | /* Non-zero means echo characters as they are read. Defaults to no echo; |
| 182 | set to 1 if there is a controlling terminal, we can get its attributes, |
| 183 | and the attributes include `echo'. Look at rltty.c:prepare_terminal_settings |
| 184 | for the code that sets it. */ |
| 185 | int _rl_echoing_p = 0; |
| 186 | |
| 187 | /* Current prompt. */ |
| 188 | char *rl_prompt = (char *)NULL; |
| 189 | int rl_visible_prompt_length = 0; |
| 190 | |
| 191 | /* Set to non-zero by calling application if it has already printed rl_prompt |
| 192 | and does not want readline to do it the first time. */ |
| 193 | int rl_already_prompted = 0; |
| 194 | |
| 195 | /* The number of characters read in order to type this complete command. */ |
| 196 | int rl_key_sequence_length = 0; |
| 197 | |
| 198 | /* If non-zero, then this is the address of a function to call just |
| 199 | before readline_internal_setup () prints the first prompt. */ |
| 200 | rl_hook_func_t *rl_startup_hook = (rl_hook_func_t *)NULL; |
| 201 | |
| 202 | /* If non-zero, this is the address of a function to call just before |
| 203 | readline_internal_setup () returns and readline_internal starts |
| 204 | reading input characters. */ |
| 205 | rl_hook_func_t *rl_pre_input_hook = (rl_hook_func_t *)NULL; |
| 206 | |
| 207 | /* What we use internally. You should always refer to RL_LINE_BUFFER. */ |
| 208 | static char *the_line; |
| 209 | |
| 210 | /* The character that can generate an EOF. Really read from |
| 211 | the terminal driver... just defaulted here. */ |
| 212 | int _rl_eof_char = CTRL ('D'); |
| 213 | |
| 214 | /* Non-zero makes this the next keystroke to read. */ |
| 215 | int rl_pending_input = 0; |
| 216 | |
| 217 | /* If non-zero when readline_internal returns, it means we found EOF */ |
| 218 | int _rl_eof_found = 0; |
| 219 | |
| 220 | /* Pointer to a useful terminal name. */ |
| 221 | const char *rl_terminal_name = (const char *)NULL; |
| 222 | |
| 223 | /* Non-zero means to always use horizontal scrolling in line display. */ |
| 224 | int _rl_horizontal_scroll_mode = 0; |
| 225 | |
| 226 | /* Non-zero means to display an asterisk at the starts of history lines |
| 227 | which have been modified. */ |
| 228 | int _rl_mark_modified_lines = 0; |
| 229 | |
| 230 | /* The style of `bell' notification preferred. This can be set to NO_BELL, |
| 231 | AUDIBLE_BELL, or VISIBLE_BELL. */ |
| 232 | int _rl_bell_preference = AUDIBLE_BELL; |
| 233 | |
| 234 | /* String inserted into the line by rl_insert_comment (). */ |
| 235 | char *_rl_comment_begin; |
| 236 | |
| 237 | /* Keymap holding the function currently being executed. */ |
| 238 | Keymap rl_executing_keymap; |
| 239 | |
| 240 | /* Keymap we're currently using to dispatch. */ |
| 241 | Keymap _rl_dispatching_keymap; |
| 242 | |
| 243 | /* Non-zero means to erase entire line, including prompt, on empty input lines. */ |
| 244 | int rl_erase_empty_line = 0; |
| 245 | |
| 246 | /* Non-zero means to read only this many characters rather than up to a |
| 247 | character bound to accept-line. */ |
| 248 | int rl_num_chars_to_read = 0; |
| 249 | |
| 250 | /* Line buffer and maintenance. */ |
| 251 | char *rl_line_buffer = (char *)NULL; |
| 252 | int rl_line_buffer_len = 0; |
| 253 | |
| 254 | /* Key sequence `contexts' */ |
| 255 | _rl_keyseq_cxt *_rl_kscxt = 0; |
| 256 | |
| 257 | int rl_executing_key; |
| 258 | char *rl_executing_keyseq = 0; |
| 259 | int _rl_executing_keyseq_size = 0; |
| 260 | |
| 261 | /* Timeout (specified in milliseconds) when reading characters making up an |
| 262 | ambiguous multiple-key sequence */ |
| 263 | int _rl_keyseq_timeout = 500; |
| 264 | |
| 265 | #define RESIZE_KEYSEQ_BUFFER() \ |
| 266 | do \ |
| 267 | { \ |
| 268 | if (rl_key_sequence_length + 2 >= _rl_executing_keyseq_size) \ |
| 269 | { \ |
| 270 | _rl_executing_keyseq_size += 16; \ |
| 271 | rl_executing_keyseq = xrealloc (rl_executing_keyseq, _rl_executing_keyseq_size); \ |
| 272 | } \ |
| 273 | } \ |
| 274 | while (0); |
| 275 | |
| 276 | /* Forward declarations used by the display, termcap, and history code. */ |
| 277 | |
| 278 | /* **************************************************************** */ |
| 279 | /* */ |
| 280 | /* `Forward' declarations */ |
| 281 | /* */ |
| 282 | /* **************************************************************** */ |
| 283 | |
| 284 | /* Non-zero means do not parse any lines other than comments and |
| 285 | parser directives. */ |
| 286 | unsigned char _rl_parsing_conditionalized_out = 0; |
| 287 | |
| 288 | /* Non-zero means to convert characters with the meta bit set to |
| 289 | escape-prefixed characters so we can indirect through |
| 290 | emacs_meta_keymap or vi_escape_keymap. */ |
| 291 | int _rl_convert_meta_chars_to_ascii = 1; |
| 292 | |
| 293 | /* Non-zero means to output characters with the meta bit set directly |
| 294 | rather than as a meta-prefixed escape sequence. */ |
| 295 | int _rl_output_meta_chars = 0; |
| 296 | |
| 297 | /* Non-zero means to look at the termios special characters and bind |
| 298 | them to equivalent readline functions at startup. */ |
| 299 | int _rl_bind_stty_chars = 1; |
| 300 | |
| 301 | /* Non-zero means to go through the history list at every newline (or |
| 302 | whenever rl_done is set and readline returns) and revert each line to |
| 303 | its initial state. */ |
| 304 | int _rl_revert_all_at_newline = 0; |
| 305 | |
| 306 | /* Non-zero means to honor the termios ECHOCTL bit and echo control |
| 307 | characters corresponding to keyboard-generated signals. */ |
| 308 | int _rl_echo_control_chars = 1; |
| 309 | |
| 310 | /* Non-zero means to prefix the displayed prompt with a character indicating |
| 311 | the editing mode: @ for emacs, : for vi-command, + for vi-insert. */ |
| 312 | int _rl_show_mode_in_prompt = 0; |
| 313 | |
| 314 | /* Non-zero means to attempt to put the terminal in `bracketed paste mode', |
| 315 | where it will prefix pasted text with an escape sequence and send |
| 316 | another to mark the end of the paste. */ |
| 317 | int _rl_enable_bracketed_paste = 0; |
| 318 | |
| 319 | /* **************************************************************** */ |
| 320 | /* */ |
| 321 | /* Top Level Functions */ |
| 322 | /* */ |
| 323 | /* **************************************************************** */ |
| 324 | |
| 325 | /* Non-zero means treat 0200 bit in terminal input as Meta bit. */ |
| 326 | int _rl_meta_flag = 0; /* Forward declaration */ |
| 327 | |
| 328 | /* Set up the prompt and expand it. Called from readline() and |
| 329 | rl_callback_handler_install (). */ |
| 330 | int |
| 331 | rl_set_prompt (const char *prompt) |
| 332 | { |
| 333 | FREE (rl_prompt); |
| 334 | rl_prompt = prompt ? savestring (prompt) : (char *)NULL; |
| 335 | rl_display_prompt = rl_prompt ? rl_prompt : ""; |
| 336 | |
| 337 | rl_visible_prompt_length = rl_expand_prompt (rl_prompt); |
| 338 | return 0; |
| 339 | } |
| 340 | |
| 341 | /* Read a line of input. Prompt with PROMPT. An empty PROMPT means |
| 342 | none. A return value of NULL means that EOF was encountered. */ |
| 343 | char * |
| 344 | readline (const char *prompt) |
| 345 | { |
| 346 | char *value; |
| 347 | #if 0 |
| 348 | int in_callback; |
| 349 | #endif |
| 350 | |
| 351 | /* If we are at EOF return a NULL string. */ |
| 352 | if (rl_pending_input == EOF) |
| 353 | { |
| 354 | rl_clear_pending_input (); |
| 355 | return ((char *)NULL); |
| 356 | } |
| 357 | |
| 358 | #if 0 |
| 359 | /* If readline() is called after installing a callback handler, temporarily |
| 360 | turn off the callback state to avoid ensuing messiness. Patch supplied |
| 361 | by the gdb folks. XXX -- disabled. This can be fooled and readline |
| 362 | left in a strange state by a poorly-timed longjmp. */ |
| 363 | if (in_callback = RL_ISSTATE (RL_STATE_CALLBACK)) |
| 364 | RL_UNSETSTATE (RL_STATE_CALLBACK); |
| 365 | #endif |
| 366 | |
| 367 | rl_set_prompt (prompt); |
| 368 | |
| 369 | rl_initialize (); |
| 370 | if (rl_prep_term_function) |
| 371 | (*rl_prep_term_function) (_rl_meta_flag); |
| 372 | |
| 373 | #if defined (HANDLE_SIGNALS) |
| 374 | rl_set_signals (); |
| 375 | #endif |
| 376 | |
| 377 | value = readline_internal (); |
| 378 | if (rl_deprep_term_function) |
| 379 | (*rl_deprep_term_function) (); |
| 380 | |
| 381 | #if defined (HANDLE_SIGNALS) |
| 382 | rl_clear_signals (); |
| 383 | #endif |
| 384 | |
| 385 | #if 0 |
| 386 | if (in_callback) |
| 387 | RL_SETSTATE (RL_STATE_CALLBACK); |
| 388 | #endif |
| 389 | |
| 390 | #if HAVE_DECL_AUDIT_USER_TTY && defined (HAVE_LIBAUDIT_H) && defined (ENABLE_TTY_AUDIT_SUPPORT) |
| 391 | if (value) |
| 392 | _rl_audit_tty (value); |
| 393 | #endif |
| 394 | |
| 395 | return (value); |
| 396 | } |
| 397 | |
| 398 | #if defined (READLINE_CALLBACKS) |
| 399 | # define STATIC_CALLBACK |
| 400 | #else |
| 401 | # define STATIC_CALLBACK static |
| 402 | #endif |
| 403 | |
| 404 | STATIC_CALLBACK void |
| 405 | readline_internal_setup (void) |
| 406 | { |
| 407 | char *nprompt; |
| 408 | |
| 409 | _rl_in_stream = rl_instream; |
| 410 | _rl_out_stream = rl_outstream; |
| 411 | |
| 412 | /* Enable the meta key only for the duration of readline(), if this |
| 413 | terminal has one and the terminal has been initialized */ |
| 414 | if (_rl_enable_meta & RL_ISSTATE (RL_STATE_TERMPREPPED)) |
| 415 | _rl_enable_meta_key (); |
| 416 | |
| 417 | if (rl_startup_hook) |
| 418 | (*rl_startup_hook) (); |
| 419 | |
| 420 | #if defined (VI_MODE) |
| 421 | if (rl_editing_mode == vi_mode) |
| 422 | rl_vi_insertion_mode (1, 'i'); /* don't want to reset last */ |
| 423 | else |
| 424 | #endif /* VI_MODE */ |
| 425 | if (_rl_show_mode_in_prompt) |
| 426 | _rl_reset_prompt (); |
| 427 | |
| 428 | /* If we're not echoing, we still want to at least print a prompt, because |
| 429 | rl_redisplay will not do it for us. If the calling application has a |
| 430 | custom redisplay function, though, let that function handle it. */ |
| 431 | if (_rl_echoing_p == 0 && rl_redisplay_function == rl_redisplay) |
| 432 | { |
| 433 | if (rl_prompt && rl_already_prompted == 0) |
| 434 | { |
| 435 | nprompt = _rl_strip_prompt (rl_prompt); |
| 436 | fprintf (_rl_out_stream, "%s", nprompt); |
| 437 | fflush (_rl_out_stream); |
| 438 | xfree (nprompt); |
| 439 | } |
| 440 | } |
| 441 | else |
| 442 | { |
| 443 | if (rl_prompt && rl_already_prompted) |
| 444 | rl_on_new_line_with_prompt (); |
| 445 | else |
| 446 | rl_on_new_line (); |
| 447 | (*rl_redisplay_function) (); |
| 448 | } |
| 449 | |
| 450 | if (rl_pre_input_hook) |
| 451 | (*rl_pre_input_hook) (); |
| 452 | |
| 453 | RL_CHECK_SIGNALS (); |
| 454 | } |
| 455 | |
| 456 | STATIC_CALLBACK char * |
| 457 | readline_internal_teardown (int eof) |
| 458 | { |
| 459 | char *temp; |
| 460 | HIST_ENTRY *entry; |
| 461 | |
| 462 | RL_CHECK_SIGNALS (); |
| 463 | |
| 464 | /* Restore the original of this history line, iff the line that we |
| 465 | are editing was originally in the history, AND the line has changed. */ |
| 466 | entry = current_history (); |
| 467 | |
| 468 | if (entry && rl_undo_list) |
| 469 | { |
| 470 | temp = savestring (the_line); |
| 471 | rl_revert_line (1, 0); |
| 472 | entry = replace_history_entry (where_history (), the_line, (histdata_t)NULL); |
| 473 | _rl_free_history_entry (entry); |
| 474 | |
| 475 | strcpy (the_line, temp); |
| 476 | xfree (temp); |
| 477 | } |
| 478 | |
| 479 | if (_rl_revert_all_at_newline) |
| 480 | _rl_revert_all_lines (); |
| 481 | |
| 482 | /* At any rate, it is highly likely that this line has an undo list. Get |
| 483 | rid of it now. */ |
| 484 | if (rl_undo_list) |
| 485 | rl_free_undo_list (); |
| 486 | |
| 487 | /* Disable the meta key, if this terminal has one and we were told to use it. |
| 488 | The check whether or not we sent the enable string is in |
| 489 | _rl_disable_meta_key(); the flag is set in _rl_enable_meta_key */ |
| 490 | _rl_disable_meta_key (); |
| 491 | |
| 492 | /* Restore normal cursor, if available. */ |
| 493 | _rl_set_insert_mode (RL_IM_INSERT, 0); |
| 494 | |
| 495 | return (eof ? (char *)NULL : savestring (the_line)); |
| 496 | } |
| 497 | |
| 498 | void |
| 499 | _rl_internal_char_cleanup (void) |
| 500 | { |
| 501 | #if defined (VI_MODE) |
| 502 | /* In vi mode, when you exit insert mode, the cursor moves back |
| 503 | over the previous character. We explicitly check for that here. */ |
| 504 | if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap) |
| 505 | rl_vi_check (); |
| 506 | #endif /* VI_MODE */ |
| 507 | |
| 508 | if (rl_num_chars_to_read && rl_end >= rl_num_chars_to_read) |
| 509 | { |
| 510 | (*rl_redisplay_function) (); |
| 511 | _rl_want_redisplay = 0; |
| 512 | rl_newline (1, '\n'); |
| 513 | } |
| 514 | |
| 515 | if (rl_done == 0) |
| 516 | { |
| 517 | (*rl_redisplay_function) (); |
| 518 | _rl_want_redisplay = 0; |
| 519 | } |
| 520 | |
| 521 | /* If the application writer has told us to erase the entire line if |
| 522 | the only character typed was something bound to rl_newline, do so. */ |
| 523 | if (rl_erase_empty_line && rl_done && rl_last_func == rl_newline && |
| 524 | rl_point == 0 && rl_end == 0) |
| 525 | _rl_erase_entire_line (); |
| 526 | } |
| 527 | |
| 528 | STATIC_CALLBACK int |
| 529 | #if defined (READLINE_CALLBACKS) |
| 530 | readline_internal_char (void) |
| 531 | #else |
| 532 | readline_internal_charloop (void) |
| 533 | #endif |
| 534 | { |
| 535 | static int lastc, eof_found; |
| 536 | int c, code, lk, r; |
| 537 | |
| 538 | lastc = EOF; |
| 539 | |
| 540 | #if !defined (READLINE_CALLBACKS) |
| 541 | eof_found = 0; |
| 542 | while (rl_done == 0) |
| 543 | { |
| 544 | #endif |
| 545 | lk = _rl_last_command_was_kill; |
| 546 | |
| 547 | #if defined (HAVE_POSIX_SIGSETJMP) |
| 548 | code = sigsetjmp (_rl_top_level, 0); |
| 549 | #else |
| 550 | code = setjmp (_rl_top_level); |
| 551 | #endif |
| 552 | |
| 553 | if (code) |
| 554 | { |
| 555 | (*rl_redisplay_function) (); |
| 556 | _rl_want_redisplay = 0; |
| 557 | /* If we get here, we're not being called from something dispatched |
| 558 | from _rl_callback_read_char(), which sets up its own value of |
| 559 | _rl_top_level (saving and restoring the old, of course), so |
| 560 | we can just return here. */ |
| 561 | if (RL_ISSTATE (RL_STATE_CALLBACK)) |
| 562 | return (0); |
| 563 | } |
| 564 | |
| 565 | if (rl_pending_input == 0) |
| 566 | { |
| 567 | /* Then initialize the argument and number of keys read. */ |
| 568 | _rl_reset_argument (); |
| 569 | rl_executing_keyseq[rl_key_sequence_length = 0] = '\0'; |
| 570 | } |
| 571 | |
| 572 | RL_SETSTATE(RL_STATE_READCMD); |
| 573 | c = rl_read_key (); |
| 574 | RL_UNSETSTATE(RL_STATE_READCMD); |
| 575 | |
| 576 | /* look at input.c:rl_getc() for the circumstances under which this will |
| 577 | be returned; punt immediately on read error without converting it to |
| 578 | a newline; assume that rl_read_key has already called the signal |
| 579 | handler. */ |
| 580 | if (c == READERR) |
| 581 | { |
| 582 | #if defined (READLINE_CALLBACKS) |
| 583 | RL_SETSTATE(RL_STATE_DONE); |
| 584 | return (rl_done = 1); |
| 585 | #else |
| 586 | eof_found = 1; |
| 587 | break; |
| 588 | #endif |
| 589 | } |
| 590 | |
| 591 | /* EOF typed to a non-blank line is ^D the first time, EOF the second |
| 592 | time in a row. This won't return any partial line read from the tty. |
| 593 | If we want to change this, to force any existing line to be returned |
| 594 | when read(2) reads EOF, for example, this is the place to change. */ |
| 595 | if (c == EOF && rl_end) |
| 596 | { |
| 597 | if (RL_SIG_RECEIVED ()) |
| 598 | { |
| 599 | RL_CHECK_SIGNALS (); |
| 600 | if (rl_signal_event_hook) |
| 601 | (*rl_signal_event_hook) (); /* XXX */ |
| 602 | } |
| 603 | |
| 604 | /* XXX - reading two consecutive EOFs returns EOF */ |
| 605 | if (RL_ISSTATE (RL_STATE_TERMPREPPED)) |
| 606 | { |
| 607 | if (lastc == _rl_eof_char || lastc == EOF) |
| 608 | rl_end = 0; |
| 609 | else |
| 610 | c = _rl_eof_char; |
| 611 | } |
| 612 | else |
| 613 | c = NEWLINE; |
| 614 | } |
| 615 | |
| 616 | /* The character _rl_eof_char typed to blank line, and not as the |
| 617 | previous character is interpreted as EOF. This doesn't work when |
| 618 | READLINE_CALLBACKS is defined, so hitting a series of ^Ds will |
| 619 | erase all the chars on the line and then return EOF. */ |
| 620 | if (((c == _rl_eof_char && lastc != c) || c == EOF) && rl_end == 0) |
| 621 | { |
| 622 | #if defined (READLINE_CALLBACKS) |
| 623 | RL_SETSTATE(RL_STATE_DONE); |
| 624 | return (rl_done = 1); |
| 625 | #else |
| 626 | eof_found = 1; |
| 627 | break; |
| 628 | #endif |
| 629 | } |
| 630 | |
| 631 | lastc = c; |
| 632 | r = _rl_dispatch ((unsigned char)c, _rl_keymap); |
| 633 | RL_CHECK_SIGNALS (); |
| 634 | |
| 635 | /* If there was no change in _rl_last_command_was_kill, then no kill |
| 636 | has taken place. Note that if input is pending we are reading |
| 637 | a prefix command, so nothing has changed yet. */ |
| 638 | if (rl_pending_input == 0 && lk == _rl_last_command_was_kill) |
| 639 | _rl_last_command_was_kill = 0; |
| 640 | |
| 641 | _rl_internal_char_cleanup (); |
| 642 | |
| 643 | #if defined (READLINE_CALLBACKS) |
| 644 | return 0; |
| 645 | #else |
| 646 | } |
| 647 | |
| 648 | return (eof_found); |
| 649 | #endif |
| 650 | } |
| 651 | |
| 652 | #if defined (READLINE_CALLBACKS) |
| 653 | static int |
| 654 | readline_internal_charloop (void) |
| 655 | { |
| 656 | int eof = 1; |
| 657 | |
| 658 | while (rl_done == 0) |
| 659 | eof = readline_internal_char (); |
| 660 | return (eof); |
| 661 | } |
| 662 | #endif /* READLINE_CALLBACKS */ |
| 663 | |
| 664 | /* Read a line of input from the global rl_instream, doing output on |
| 665 | the global rl_outstream. |
| 666 | If rl_prompt is non-null, then that is our prompt. */ |
| 667 | static char * |
| 668 | readline_internal (void) |
| 669 | { |
| 670 | readline_internal_setup (); |
| 671 | _rl_eof_found = readline_internal_charloop (); |
| 672 | return (readline_internal_teardown (_rl_eof_found)); |
| 673 | } |
| 674 | |
| 675 | void |
| 676 | _rl_init_line_state (void) |
| 677 | { |
| 678 | rl_point = rl_end = rl_mark = 0; |
| 679 | the_line = rl_line_buffer; |
| 680 | the_line[0] = 0; |
| 681 | } |
| 682 | |
| 683 | void |
| 684 | _rl_set_the_line (void) |
| 685 | { |
| 686 | the_line = rl_line_buffer; |
| 687 | } |
| 688 | |
| 689 | #if defined (READLINE_CALLBACKS) |
| 690 | _rl_keyseq_cxt * |
| 691 | _rl_keyseq_cxt_alloc (void) |
| 692 | { |
| 693 | _rl_keyseq_cxt *cxt; |
| 694 | |
| 695 | cxt = (_rl_keyseq_cxt *)xmalloc (sizeof (_rl_keyseq_cxt)); |
| 696 | |
| 697 | cxt->flags = cxt->subseq_arg = cxt->subseq_retval = 0; |
| 698 | |
| 699 | cxt->okey = 0; |
| 700 | cxt->ocxt = _rl_kscxt; |
| 701 | cxt->childval = 42; /* sentinel value */ |
| 702 | |
| 703 | return cxt; |
| 704 | } |
| 705 | |
| 706 | void |
| 707 | _rl_keyseq_cxt_dispose (_rl_keyseq_cxt *cxt) |
| 708 | { |
| 709 | xfree (cxt); |
| 710 | } |
| 711 | |
| 712 | void |
| 713 | _rl_keyseq_chain_dispose (void) |
| 714 | { |
| 715 | _rl_keyseq_cxt *cxt; |
| 716 | |
| 717 | while (_rl_kscxt) |
| 718 | { |
| 719 | cxt = _rl_kscxt; |
| 720 | _rl_kscxt = _rl_kscxt->ocxt; |
| 721 | _rl_keyseq_cxt_dispose (cxt); |
| 722 | } |
| 723 | } |
| 724 | #endif |
| 725 | |
| 726 | static int |
| 727 | _rl_subseq_getchar (int key) |
| 728 | { |
| 729 | int k; |
| 730 | |
| 731 | if (key == ESC) |
| 732 | RL_SETSTATE(RL_STATE_METANEXT); |
| 733 | RL_SETSTATE(RL_STATE_MOREINPUT); |
| 734 | k = rl_read_key (); |
| 735 | RL_UNSETSTATE(RL_STATE_MOREINPUT); |
| 736 | if (key == ESC) |
| 737 | RL_UNSETSTATE(RL_STATE_METANEXT); |
| 738 | |
| 739 | return k; |
| 740 | } |
| 741 | |
| 742 | #if defined (READLINE_CALLBACKS) |
| 743 | int |
| 744 | _rl_dispatch_callback (_rl_keyseq_cxt *cxt) |
| 745 | { |
| 746 | int nkey, r; |
| 747 | |
| 748 | /* For now */ |
| 749 | /* The first time this context is used, we want to read input and dispatch |
| 750 | on it. When traversing the chain of contexts back `up', we want to use |
| 751 | the value from the next context down. We're simulating recursion using |
| 752 | a chain of contexts. */ |
| 753 | if ((cxt->flags & KSEQ_DISPATCHED) == 0) |
| 754 | { |
| 755 | nkey = _rl_subseq_getchar (cxt->okey); |
| 756 | if (nkey < 0) |
| 757 | { |
| 758 | _rl_abort_internal (); |
| 759 | return -1; |
| 760 | } |
| 761 | r = _rl_dispatch_subseq (nkey, cxt->dmap, cxt->subseq_arg); |
| 762 | cxt->flags |= KSEQ_DISPATCHED; |
| 763 | } |
| 764 | else |
| 765 | r = cxt->childval; |
| 766 | |
| 767 | /* For now */ |
| 768 | if (r != -3) /* don't do this if we indicate there will be other matches */ |
| 769 | r = _rl_subseq_result (r, cxt->oldmap, cxt->okey, (cxt->flags & KSEQ_SUBSEQ)); |
| 770 | |
| 771 | RL_CHECK_SIGNALS (); |
| 772 | /* We only treat values < 0 specially to simulate recursion. */ |
| 773 | if (r >= 0 || (r == -1 && (cxt->flags & KSEQ_SUBSEQ) == 0)) /* success! or failure! */ |
| 774 | { |
| 775 | _rl_keyseq_chain_dispose (); |
| 776 | RL_UNSETSTATE (RL_STATE_MULTIKEY); |
| 777 | return r; |
| 778 | } |
| 779 | |
| 780 | if (r != -3) /* magic value that says we added to the chain */ |
| 781 | _rl_kscxt = cxt->ocxt; |
| 782 | if (_rl_kscxt) |
| 783 | _rl_kscxt->childval = r; |
| 784 | if (r != -3) |
| 785 | _rl_keyseq_cxt_dispose (cxt); |
| 786 | |
| 787 | return r; |
| 788 | } |
| 789 | #endif /* READLINE_CALLBACKS */ |
| 790 | |
| 791 | /* Do the command associated with KEY in MAP. |
| 792 | If the associated command is really a keymap, then read |
| 793 | another key, and dispatch into that map. */ |
| 794 | int |
| 795 | _rl_dispatch (register int key, Keymap map) |
| 796 | { |
| 797 | _rl_dispatching_keymap = map; |
| 798 | return _rl_dispatch_subseq (key, map, 0); |
| 799 | } |
| 800 | |
| 801 | int |
| 802 | _rl_dispatch_subseq (register int key, Keymap map, int got_subseq) |
| 803 | { |
| 804 | int r, newkey; |
| 805 | char *macro; |
| 806 | rl_command_func_t *func; |
| 807 | #if defined (READLINE_CALLBACKS) |
| 808 | _rl_keyseq_cxt *cxt; |
| 809 | #endif |
| 810 | |
| 811 | if (META_CHAR (key) && _rl_convert_meta_chars_to_ascii) |
| 812 | { |
| 813 | if (map[ESC].type == ISKMAP) |
| 814 | { |
| 815 | if (RL_ISSTATE (RL_STATE_MACRODEF)) |
| 816 | _rl_add_macro_char (ESC); |
| 817 | RESIZE_KEYSEQ_BUFFER (); |
| 818 | rl_executing_keyseq[rl_key_sequence_length++] = ESC; |
| 819 | map = FUNCTION_TO_KEYMAP (map, ESC); |
| 820 | key = UNMETA (key); |
| 821 | return (_rl_dispatch (key, map)); |
| 822 | } |
| 823 | else |
| 824 | rl_ding (); |
| 825 | return 0; |
| 826 | } |
| 827 | |
| 828 | if (RL_ISSTATE (RL_STATE_MACRODEF)) |
| 829 | _rl_add_macro_char (key); |
| 830 | |
| 831 | r = 0; |
| 832 | switch (map[key].type) |
| 833 | { |
| 834 | case ISFUNC: |
| 835 | func = map[key].function; |
| 836 | if (func) |
| 837 | { |
| 838 | /* Special case rl_do_lowercase_version (). */ |
| 839 | if (func == rl_do_lowercase_version) |
| 840 | /* Should we do anything special if key == ANYOTHERKEY? */ |
| 841 | return (_rl_dispatch (_rl_to_lower ((unsigned char)key), map)); |
| 842 | |
| 843 | rl_executing_keymap = map; |
| 844 | rl_executing_key = key; |
| 845 | |
| 846 | RESIZE_KEYSEQ_BUFFER(); |
| 847 | rl_executing_keyseq[rl_key_sequence_length++] = key; |
| 848 | rl_executing_keyseq[rl_key_sequence_length] = '\0'; |
| 849 | |
| 850 | rl_dispatching = 1; |
| 851 | RL_SETSTATE(RL_STATE_DISPATCHING); |
| 852 | r = (*func) (rl_numeric_arg * rl_arg_sign, key); |
| 853 | RL_UNSETSTATE(RL_STATE_DISPATCHING); |
| 854 | rl_dispatching = 0; |
| 855 | |
| 856 | /* If we have input pending, then the last command was a prefix |
| 857 | command. Don't change the state of rl_last_func. Otherwise, |
| 858 | remember the last command executed in this variable. */ |
| 859 | if (rl_pending_input == 0 && map[key].function != rl_digit_argument) |
| 860 | rl_last_func = map[key].function; |
| 861 | |
| 862 | RL_CHECK_SIGNALS (); |
| 863 | } |
| 864 | else if (map[ANYOTHERKEY].function) |
| 865 | { |
| 866 | /* OK, there's no function bound in this map, but there is a |
| 867 | shadow function that was overridden when the current keymap |
| 868 | was created. Return -2 to note that. */ |
| 869 | if (RL_ISSTATE (RL_STATE_MACROINPUT)) |
| 870 | _rl_prev_macro_key (); |
| 871 | else |
| 872 | _rl_unget_char (key); |
| 873 | return -2; |
| 874 | } |
| 875 | else if (got_subseq) |
| 876 | { |
| 877 | /* Return -1 to note that we're in a subsequence, but we don't |
| 878 | have a matching key, nor was one overridden. This means |
| 879 | we need to back up the recursion chain and find the last |
| 880 | subsequence that is bound to a function. */ |
| 881 | if (RL_ISSTATE (RL_STATE_MACROINPUT)) |
| 882 | _rl_prev_macro_key (); |
| 883 | else |
| 884 | _rl_unget_char (key); |
| 885 | return -1; |
| 886 | } |
| 887 | else |
| 888 | { |
| 889 | #if defined (READLINE_CALLBACKS) |
| 890 | RL_UNSETSTATE (RL_STATE_MULTIKEY); |
| 891 | _rl_keyseq_chain_dispose (); |
| 892 | #endif |
| 893 | _rl_abort_internal (); |
| 894 | return -1; |
| 895 | } |
| 896 | break; |
| 897 | |
| 898 | case ISKMAP: |
| 899 | if (map[key].function != 0) |
| 900 | { |
| 901 | #if defined (VI_MODE) |
| 902 | /* The only way this test will be true is if a subsequence has been |
| 903 | bound starting with ESC, generally the arrow keys. What we do is |
| 904 | check whether there's input in the queue, which there generally |
| 905 | will be if an arrow key has been pressed, and, if there's not, |
| 906 | just dispatch to (what we assume is) rl_vi_movement_mode right |
| 907 | away. This is essentially an input test with a zero timeout (by |
| 908 | default) or a timeout determined by the value of `keyseq-timeout' */ |
| 909 | /* _rl_keyseq_timeout specified in milliseconds; _rl_input_queued |
| 910 | takes microseconds, so multiply by 1000 */ |
| 911 | if (rl_editing_mode == vi_mode && key == ESC && map == vi_insertion_keymap && |
| 912 | (RL_ISSTATE (RL_STATE_INPUTPENDING|RL_STATE_MACROINPUT) == 0) && |
| 913 | _rl_pushed_input_available () == 0 && |
| 914 | _rl_input_queued ((_rl_keyseq_timeout > 0) ? _rl_keyseq_timeout*1000 : 0) == 0) |
| 915 | return (_rl_dispatch (ANYOTHERKEY, FUNCTION_TO_KEYMAP (map, key))); |
| 916 | /* This is a very specific test. It can possibly be generalized in |
| 917 | the future, but for now it handles a specific case of ESC being |
| 918 | the last character in a keyboard macro. */ |
| 919 | if (rl_editing_mode == vi_mode && key == ESC && map == vi_insertion_keymap && |
| 920 | (RL_ISSTATE (RL_STATE_INPUTPENDING) == 0) && |
| 921 | (RL_ISSTATE (RL_STATE_MACROINPUT) && _rl_peek_macro_key () == 0) && |
| 922 | _rl_pushed_input_available () == 0 && |
| 923 | _rl_input_queued ((_rl_keyseq_timeout > 0) ? _rl_keyseq_timeout*1000 : 0) == 0) |
| 924 | return (_rl_dispatch (ANYOTHERKEY, FUNCTION_TO_KEYMAP (map, key))); |
| 925 | #endif |
| 926 | |
| 927 | RESIZE_KEYSEQ_BUFFER (); |
| 928 | rl_executing_keyseq[rl_key_sequence_length++] = key; |
| 929 | _rl_dispatching_keymap = FUNCTION_TO_KEYMAP (map, key); |
| 930 | |
| 931 | /* Allocate new context here. Use linked contexts (linked through |
| 932 | cxt->ocxt) to simulate recursion */ |
| 933 | #if defined (READLINE_CALLBACKS) |
| 934 | # if defined (VI_MODE) |
| 935 | /* If we're redoing a vi mode command and we know there is a shadowed |
| 936 | function corresponding to this key, just call it -- all the redoable |
| 937 | vi mode commands already have all the input they need, and rl_vi_redo |
| 938 | assumes that one call to rl_dispatch is sufficient to complete the |
| 939 | command. */ |
| 940 | if (_rl_vi_redoing && RL_ISSTATE (RL_STATE_CALLBACK) && |
| 941 | map[ANYOTHERKEY].function != 0) |
| 942 | return (_rl_subseq_result (-2, map, key, got_subseq)); |
| 943 | # endif |
| 944 | if (RL_ISSTATE (RL_STATE_CALLBACK)) |
| 945 | { |
| 946 | /* Return 0 only the first time, to indicate success to |
| 947 | _rl_callback_read_char. The rest of the time, we're called |
| 948 | from _rl_dispatch_callback, so we return -3 to indicate |
| 949 | special handling is necessary. */ |
| 950 | r = RL_ISSTATE (RL_STATE_MULTIKEY) ? -3 : 0; |
| 951 | cxt = _rl_keyseq_cxt_alloc (); |
| 952 | |
| 953 | if (got_subseq) |
| 954 | cxt->flags |= KSEQ_SUBSEQ; |
| 955 | cxt->okey = key; |
| 956 | cxt->oldmap = map; |
| 957 | cxt->dmap = _rl_dispatching_keymap; |
| 958 | cxt->subseq_arg = got_subseq || cxt->dmap[ANYOTHERKEY].function; |
| 959 | |
| 960 | RL_SETSTATE (RL_STATE_MULTIKEY); |
| 961 | _rl_kscxt = cxt; |
| 962 | |
| 963 | return r; /* don't indicate immediate success */ |
| 964 | } |
| 965 | #endif |
| 966 | |
| 967 | /* Tentative inter-character timeout for potential multi-key |
| 968 | sequences? If no input within timeout, abort sequence and |
| 969 | act as if we got non-matching input. */ |
| 970 | /* _rl_keyseq_timeout specified in milliseconds; _rl_input_queued |
| 971 | takes microseconds, so multiply by 1000 */ |
| 972 | if (_rl_keyseq_timeout > 0 && |
| 973 | (RL_ISSTATE (RL_STATE_INPUTPENDING|RL_STATE_MACROINPUT) == 0) && |
| 974 | _rl_pushed_input_available () == 0 && |
| 975 | _rl_dispatching_keymap[ANYOTHERKEY].function && |
| 976 | _rl_input_queued (_rl_keyseq_timeout*1000) == 0) |
| 977 | return (_rl_subseq_result (-2, map, key, got_subseq)); |
| 978 | |
| 979 | newkey = _rl_subseq_getchar (key); |
| 980 | if (newkey < 0) |
| 981 | { |
| 982 | _rl_abort_internal (); |
| 983 | return -1; |
| 984 | } |
| 985 | |
| 986 | r = _rl_dispatch_subseq (newkey, _rl_dispatching_keymap, got_subseq || map[ANYOTHERKEY].function); |
| 987 | return _rl_subseq_result (r, map, key, got_subseq); |
| 988 | } |
| 989 | else |
| 990 | { |
| 991 | _rl_abort_internal (); /* XXX */ |
| 992 | return -1; |
| 993 | } |
| 994 | break; |
| 995 | |
| 996 | case ISMACR: |
| 997 | if (map[key].function != 0) |
| 998 | { |
| 999 | rl_executing_keyseq[rl_key_sequence_length] = '\0'; |
| 1000 | macro = savestring ((char *)map[key].function); |
| 1001 | _rl_with_macro_input (macro); |
| 1002 | return 0; |
| 1003 | } |
| 1004 | break; |
| 1005 | } |
| 1006 | |
| 1007 | #if defined (VI_MODE) |
| 1008 | if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap && |
| 1009 | key != ANYOTHERKEY && |
| 1010 | _rl_dispatching_keymap == vi_movement_keymap && |
| 1011 | _rl_vi_textmod_command (key)) |
| 1012 | _rl_vi_set_last (key, rl_numeric_arg, rl_arg_sign); |
| 1013 | #endif |
| 1014 | |
| 1015 | return (r); |
| 1016 | } |
| 1017 | |
| 1018 | static int |
| 1019 | _rl_subseq_result (int r, Keymap map, int key, int got_subseq) |
| 1020 | { |
| 1021 | Keymap m; |
| 1022 | int type, nt; |
| 1023 | rl_command_func_t *func, *nf; |
| 1024 | |
| 1025 | if (r == -2) |
| 1026 | /* We didn't match anything, and the keymap we're indexed into |
| 1027 | shadowed a function previously bound to that prefix. Call |
| 1028 | the function. The recursive call to _rl_dispatch_subseq has |
| 1029 | already taken care of pushing any necessary input back onto |
| 1030 | the input queue with _rl_unget_char. */ |
| 1031 | { |
| 1032 | m = _rl_dispatching_keymap; |
| 1033 | type = m[ANYOTHERKEY].type; |
| 1034 | func = m[ANYOTHERKEY].function; |
| 1035 | if (type == ISFUNC && func == rl_do_lowercase_version) |
| 1036 | r = _rl_dispatch (_rl_to_lower ((unsigned char)key), map); |
| 1037 | else if (type == ISFUNC) |
| 1038 | { |
| 1039 | /* If we shadowed a function, whatever it is, we somehow need a |
| 1040 | keymap with map[key].func == shadowed-function. |
| 1041 | Let's use this one. Then we can dispatch using the original |
| 1042 | key, since there are commands (e.g., in vi mode) for which it |
| 1043 | matters. */ |
| 1044 | nt = m[key].type; |
| 1045 | nf = m[key].function; |
| 1046 | |
| 1047 | m[key].type = type; |
| 1048 | m[key].function = func; |
| 1049 | /* Don't change _rl_dispatching_keymap, set it here */ |
| 1050 | _rl_dispatching_keymap = map; /* previous map */ |
| 1051 | r = _rl_dispatch_subseq (key, m, 0); |
| 1052 | m[key].type = nt; |
| 1053 | m[key].function = nf; |
| 1054 | } |
| 1055 | else |
| 1056 | /* We probably shadowed a keymap, so keep going. */ |
| 1057 | r = _rl_dispatch (ANYOTHERKEY, m); |
| 1058 | } |
| 1059 | else if (r < 0 && map[ANYOTHERKEY].function) |
| 1060 | { |
| 1061 | /* We didn't match (r is probably -1), so return something to |
| 1062 | tell the caller that it should try ANYOTHERKEY for an |
| 1063 | overridden function. */ |
| 1064 | if (RL_ISSTATE (RL_STATE_MACROINPUT)) |
| 1065 | _rl_prev_macro_key (); |
| 1066 | else |
| 1067 | _rl_unget_char (key); |
| 1068 | _rl_dispatching_keymap = map; |
| 1069 | return -2; |
| 1070 | } |
| 1071 | else if (r < 0 && got_subseq) /* XXX */ |
| 1072 | { |
| 1073 | /* OK, back up the chain. */ |
| 1074 | if (RL_ISSTATE (RL_STATE_MACROINPUT)) |
| 1075 | _rl_prev_macro_key (); |
| 1076 | else |
| 1077 | _rl_unget_char (key); |
| 1078 | _rl_dispatching_keymap = map; |
| 1079 | return -1; |
| 1080 | } |
| 1081 | |
| 1082 | return r; |
| 1083 | } |
| 1084 | |
| 1085 | /* **************************************************************** */ |
| 1086 | /* */ |
| 1087 | /* Initializations */ |
| 1088 | /* */ |
| 1089 | /* **************************************************************** */ |
| 1090 | |
| 1091 | /* Initialize readline (and terminal if not already). */ |
| 1092 | int |
| 1093 | rl_initialize (void) |
| 1094 | { |
| 1095 | /* If we have never been called before, initialize the |
| 1096 | terminal and data structures. */ |
| 1097 | if (rl_initialized == 0) |
| 1098 | { |
| 1099 | RL_SETSTATE(RL_STATE_INITIALIZING); |
| 1100 | readline_initialize_everything (); |
| 1101 | RL_UNSETSTATE(RL_STATE_INITIALIZING); |
| 1102 | rl_initialized++; |
| 1103 | RL_SETSTATE(RL_STATE_INITIALIZED); |
| 1104 | } |
| 1105 | else |
| 1106 | (void)_rl_init_locale (); /* check current locale */ |
| 1107 | |
| 1108 | /* Initialize the current line information. */ |
| 1109 | _rl_init_line_state (); |
| 1110 | |
| 1111 | /* We aren't done yet. We haven't even gotten started yet! */ |
| 1112 | rl_done = 0; |
| 1113 | RL_UNSETSTATE(RL_STATE_DONE); |
| 1114 | |
| 1115 | /* Tell the history routines what is going on. */ |
| 1116 | _rl_start_using_history (); |
| 1117 | |
| 1118 | /* Make the display buffer match the state of the line. */ |
| 1119 | rl_reset_line_state (); |
| 1120 | |
| 1121 | /* No such function typed yet. */ |
| 1122 | rl_last_func = (rl_command_func_t *)NULL; |
| 1123 | |
| 1124 | /* Parsing of key-bindings begins in an enabled state. */ |
| 1125 | _rl_parsing_conditionalized_out = 0; |
| 1126 | |
| 1127 | #if defined (VI_MODE) |
| 1128 | if (rl_editing_mode == vi_mode) |
| 1129 | _rl_vi_initialize_line (); |
| 1130 | #endif |
| 1131 | |
| 1132 | /* Each line starts in insert mode (the default). */ |
| 1133 | _rl_set_insert_mode (RL_IM_DEFAULT, 1); |
| 1134 | |
| 1135 | return 0; |
| 1136 | } |
| 1137 | |
| 1138 | #if 0 |
| 1139 | #if defined (__EMX__) |
| 1140 | static void |
| 1141 | _emx_build_environ (void) |
| 1142 | { |
| 1143 | TIB *tibp; |
| 1144 | PIB *pibp; |
| 1145 | char *t, **tp; |
| 1146 | int c; |
| 1147 | |
| 1148 | DosGetInfoBlocks (&tibp, &pibp); |
| 1149 | t = pibp->pib_pchenv; |
| 1150 | for (c = 1; *t; c++) |
| 1151 | t += strlen (t) + 1; |
| 1152 | tp = environ = (char **)xmalloc ((c + 1) * sizeof (char *)); |
| 1153 | t = pibp->pib_pchenv; |
| 1154 | while (*t) |
| 1155 | { |
| 1156 | *tp++ = t; |
| 1157 | t += strlen (t) + 1; |
| 1158 | } |
| 1159 | *tp = 0; |
| 1160 | } |
| 1161 | #endif /* __EMX__ */ |
| 1162 | #endif |
| 1163 | |
| 1164 | /* Initialize the entire state of the world. */ |
| 1165 | static void |
| 1166 | readline_initialize_everything (void) |
| 1167 | { |
| 1168 | #if 0 |
| 1169 | #if defined (__EMX__) |
| 1170 | if (environ == 0) |
| 1171 | _emx_build_environ (); |
| 1172 | #endif |
| 1173 | #endif |
| 1174 | |
| 1175 | #if 0 |
| 1176 | /* Find out if we are running in Emacs -- UNUSED. */ |
| 1177 | running_in_emacs = sh_get_env_value ("EMACS") != (char *)0; |
| 1178 | #endif |
| 1179 | |
| 1180 | /* Set up input and output if they are not already set up. */ |
| 1181 | if (!rl_instream) |
| 1182 | rl_instream = stdin; |
| 1183 | |
| 1184 | if (!rl_outstream) |
| 1185 | rl_outstream = stdout; |
| 1186 | |
| 1187 | /* Bind _rl_in_stream and _rl_out_stream immediately. These values |
| 1188 | may change, but they may also be used before readline_internal () |
| 1189 | is called. */ |
| 1190 | _rl_in_stream = rl_instream; |
| 1191 | _rl_out_stream = rl_outstream; |
| 1192 | |
| 1193 | /* Allocate data structures. */ |
| 1194 | if (rl_line_buffer == 0) |
| 1195 | rl_line_buffer = (char *)xmalloc (rl_line_buffer_len = DEFAULT_BUFFER_SIZE); |
| 1196 | |
| 1197 | /* Initialize the terminal interface. */ |
| 1198 | if (rl_terminal_name == 0) |
| 1199 | rl_terminal_name = sh_get_env_value ("TERM"); |
| 1200 | _rl_init_terminal_io (rl_terminal_name); |
| 1201 | |
| 1202 | /* Bind tty characters to readline functions. */ |
| 1203 | readline_default_bindings (); |
| 1204 | |
| 1205 | /* Initialize the function names. */ |
| 1206 | rl_initialize_funmap (); |
| 1207 | |
| 1208 | /* Decide whether we should automatically go into eight-bit mode. */ |
| 1209 | _rl_init_eightbit (); |
| 1210 | |
| 1211 | /* Read in the init file. */ |
| 1212 | rl_read_init_file ((char *)NULL); |
| 1213 | |
| 1214 | /* XXX */ |
| 1215 | if (_rl_horizontal_scroll_mode && _rl_term_autowrap) |
| 1216 | { |
| 1217 | _rl_screenwidth--; |
| 1218 | _rl_screenchars -= _rl_screenheight; |
| 1219 | } |
| 1220 | |
| 1221 | /* Override the effect of any `set keymap' assignments in the |
| 1222 | inputrc file. */ |
| 1223 | rl_set_keymap_from_edit_mode (); |
| 1224 | |
| 1225 | /* Try to bind a common arrow key prefix, if not already bound. */ |
| 1226 | bind_arrow_keys (); |
| 1227 | |
| 1228 | /* Bind the bracketed paste prefix assuming that the user will enable |
| 1229 | it on terminals that support it. */ |
| 1230 | bind_bracketed_paste_prefix (); |
| 1231 | |
| 1232 | /* If the completion parser's default word break characters haven't |
| 1233 | been set yet, then do so now. */ |
| 1234 | if (rl_completer_word_break_characters == (char *)NULL) |
| 1235 | rl_completer_word_break_characters = (char *)rl_basic_word_break_characters; |
| 1236 | |
| 1237 | #if defined (COLOR_SUPPORT) |
| 1238 | if (_rl_colored_stats || _rl_colored_completion_prefix) |
| 1239 | _rl_parse_colors (); |
| 1240 | #endif |
| 1241 | |
| 1242 | rl_executing_keyseq = malloc (_rl_executing_keyseq_size = 16); |
| 1243 | if (rl_executing_keyseq) |
| 1244 | rl_executing_keyseq[0] = '\0'; |
| 1245 | } |
| 1246 | |
| 1247 | /* If this system allows us to look at the values of the regular |
| 1248 | input editing characters, then bind them to their readline |
| 1249 | equivalents, iff the characters are not bound to keymaps. */ |
| 1250 | static void |
| 1251 | readline_default_bindings (void) |
| 1252 | { |
| 1253 | if (_rl_bind_stty_chars) |
| 1254 | rl_tty_set_default_bindings (_rl_keymap); |
| 1255 | } |
| 1256 | |
| 1257 | /* Reset the default bindings for the terminal special characters we're |
| 1258 | interested in back to rl_insert and read the new ones. */ |
| 1259 | static void |
| 1260 | reset_default_bindings (void) |
| 1261 | { |
| 1262 | if (_rl_bind_stty_chars) |
| 1263 | { |
| 1264 | rl_tty_unset_default_bindings (_rl_keymap); |
| 1265 | rl_tty_set_default_bindings (_rl_keymap); |
| 1266 | } |
| 1267 | } |
| 1268 | |
| 1269 | /* Bind some common arrow key sequences in MAP. */ |
| 1270 | static void |
| 1271 | bind_arrow_keys_internal (Keymap map) |
| 1272 | { |
| 1273 | Keymap xkeymap; |
| 1274 | |
| 1275 | xkeymap = _rl_keymap; |
| 1276 | _rl_keymap = map; |
| 1277 | |
| 1278 | #if defined (__MSDOS__) |
| 1279 | rl_bind_keyseq_if_unbound ("\033[0A", rl_get_previous_history); |
| 1280 | rl_bind_keyseq_if_unbound ("\033[0B", rl_backward_char); |
| 1281 | rl_bind_keyseq_if_unbound ("\033[0C", rl_forward_char); |
| 1282 | rl_bind_keyseq_if_unbound ("\033[0D", rl_get_next_history); |
| 1283 | #endif |
| 1284 | |
| 1285 | rl_bind_keyseq_if_unbound ("\033[A", rl_get_previous_history); |
| 1286 | rl_bind_keyseq_if_unbound ("\033[B", rl_get_next_history); |
| 1287 | rl_bind_keyseq_if_unbound ("\033[C", rl_forward_char); |
| 1288 | rl_bind_keyseq_if_unbound ("\033[D", rl_backward_char); |
| 1289 | rl_bind_keyseq_if_unbound ("\033[H", rl_beg_of_line); |
| 1290 | rl_bind_keyseq_if_unbound ("\033[F", rl_end_of_line); |
| 1291 | |
| 1292 | rl_bind_keyseq_if_unbound ("\033OA", rl_get_previous_history); |
| 1293 | rl_bind_keyseq_if_unbound ("\033OB", rl_get_next_history); |
| 1294 | rl_bind_keyseq_if_unbound ("\033OC", rl_forward_char); |
| 1295 | rl_bind_keyseq_if_unbound ("\033OD", rl_backward_char); |
| 1296 | rl_bind_keyseq_if_unbound ("\033OH", rl_beg_of_line); |
| 1297 | rl_bind_keyseq_if_unbound ("\033OF", rl_end_of_line); |
| 1298 | |
| 1299 | /* Key bindings for control-arrow keys */ |
| 1300 | rl_bind_keyseq_if_unbound ("\033[1;5C", rl_forward_word); |
| 1301 | rl_bind_keyseq_if_unbound ("\033[1;5D", rl_backward_word); |
| 1302 | rl_bind_keyseq_if_unbound ("\033[3;5~", rl_kill_word); |
| 1303 | |
| 1304 | /* Key bindings for alt-arrow keys */ |
| 1305 | rl_bind_keyseq_if_unbound ("\033[1;3C", rl_forward_word); |
| 1306 | rl_bind_keyseq_if_unbound ("\033[1;3D", rl_backward_word); |
| 1307 | |
| 1308 | #if defined (__MINGW32__) |
| 1309 | rl_bind_keyseq_if_unbound ("\340H", rl_get_previous_history); |
| 1310 | rl_bind_keyseq_if_unbound ("\340P", rl_get_next_history); |
| 1311 | rl_bind_keyseq_if_unbound ("\340M", rl_forward_char); |
| 1312 | rl_bind_keyseq_if_unbound ("\340K", rl_backward_char); |
| 1313 | rl_bind_keyseq_if_unbound ("\340G", rl_beg_of_line); |
| 1314 | rl_bind_keyseq_if_unbound ("\340O", rl_end_of_line); |
| 1315 | rl_bind_keyseq_if_unbound ("\340S", rl_delete); |
| 1316 | rl_bind_keyseq_if_unbound ("\340R", rl_overwrite_mode); |
| 1317 | |
| 1318 | /* These may or may not work because of the embedded NUL. */ |
| 1319 | rl_bind_keyseq_if_unbound ("\\000H", rl_get_previous_history); |
| 1320 | rl_bind_keyseq_if_unbound ("\\000P", rl_get_next_history); |
| 1321 | rl_bind_keyseq_if_unbound ("\\000M", rl_forward_char); |
| 1322 | rl_bind_keyseq_if_unbound ("\\000K", rl_backward_char); |
| 1323 | rl_bind_keyseq_if_unbound ("\\000G", rl_beg_of_line); |
| 1324 | rl_bind_keyseq_if_unbound ("\\000O", rl_end_of_line); |
| 1325 | rl_bind_keyseq_if_unbound ("\\000S", rl_delete); |
| 1326 | rl_bind_keyseq_if_unbound ("\\000R", rl_overwrite_mode); |
| 1327 | #endif |
| 1328 | |
| 1329 | _rl_keymap = xkeymap; |
| 1330 | } |
| 1331 | |
| 1332 | /* Try and bind the common arrow key prefixes after giving termcap and |
| 1333 | the inputrc file a chance to bind them and create `real' keymaps |
| 1334 | for the arrow key prefix. */ |
| 1335 | static void |
| 1336 | bind_arrow_keys (void) |
| 1337 | { |
| 1338 | bind_arrow_keys_internal (emacs_standard_keymap); |
| 1339 | |
| 1340 | #if defined (VI_MODE) |
| 1341 | bind_arrow_keys_internal (vi_movement_keymap); |
| 1342 | /* Unbind vi_movement_keymap[ESC] to allow users to repeatedly hit ESC |
| 1343 | in vi command mode while still allowing the arrow keys to work. */ |
| 1344 | if (vi_movement_keymap[ESC].type == ISKMAP) |
| 1345 | rl_bind_keyseq_in_map ("\033", (rl_command_func_t *)NULL, vi_movement_keymap); |
| 1346 | bind_arrow_keys_internal (vi_insertion_keymap); |
| 1347 | #endif |
| 1348 | } |
| 1349 | |
| 1350 | static void |
| 1351 | bind_bracketed_paste_prefix (void) |
| 1352 | { |
| 1353 | Keymap xkeymap; |
| 1354 | |
| 1355 | xkeymap = _rl_keymap; |
| 1356 | |
| 1357 | _rl_keymap = emacs_standard_keymap; |
| 1358 | rl_bind_keyseq_if_unbound (BRACK_PASTE_PREF, rl_bracketed_paste_begin); |
| 1359 | |
| 1360 | _rl_keymap = vi_insertion_keymap; |
| 1361 | rl_bind_keyseq_if_unbound (BRACK_PASTE_PREF, rl_bracketed_paste_begin); |
| 1362 | |
| 1363 | _rl_keymap = xkeymap; |
| 1364 | } |
| 1365 | |
| 1366 | /* **************************************************************** */ |
| 1367 | /* */ |
| 1368 | /* Saving and Restoring Readline's state */ |
| 1369 | /* */ |
| 1370 | /* **************************************************************** */ |
| 1371 | |
| 1372 | int |
| 1373 | rl_save_state (struct readline_state *sp) |
| 1374 | { |
| 1375 | if (sp == 0) |
| 1376 | return -1; |
| 1377 | |
| 1378 | sp->point = rl_point; |
| 1379 | sp->end = rl_end; |
| 1380 | sp->mark = rl_mark; |
| 1381 | sp->buffer = rl_line_buffer; |
| 1382 | sp->buflen = rl_line_buffer_len; |
| 1383 | sp->ul = rl_undo_list; |
| 1384 | sp->prompt = rl_prompt; |
| 1385 | |
| 1386 | sp->rlstate = rl_readline_state; |
| 1387 | sp->done = rl_done; |
| 1388 | sp->kmap = _rl_keymap; |
| 1389 | |
| 1390 | sp->lastfunc = rl_last_func; |
| 1391 | sp->insmode = rl_insert_mode; |
| 1392 | sp->edmode = rl_editing_mode; |
| 1393 | sp->kseq = rl_executing_keyseq; |
| 1394 | sp->kseqlen = rl_key_sequence_length; |
| 1395 | sp->inf = rl_instream; |
| 1396 | sp->outf = rl_outstream; |
| 1397 | sp->pendingin = rl_pending_input; |
| 1398 | sp->macro = rl_executing_macro; |
| 1399 | |
| 1400 | sp->catchsigs = rl_catch_signals; |
| 1401 | sp->catchsigwinch = rl_catch_sigwinch; |
| 1402 | |
| 1403 | sp->entryfunc = rl_completion_entry_function; |
| 1404 | sp->menuentryfunc = rl_menu_completion_entry_function; |
| 1405 | sp->ignorefunc = rl_ignore_some_completions_function; |
| 1406 | sp->attemptfunc = rl_attempted_completion_function; |
| 1407 | sp->wordbreakchars = rl_completer_word_break_characters; |
| 1408 | |
| 1409 | return (0); |
| 1410 | } |
| 1411 | |
| 1412 | int |
| 1413 | rl_restore_state (struct readline_state *sp) |
| 1414 | { |
| 1415 | if (sp == 0) |
| 1416 | return -1; |
| 1417 | |
| 1418 | rl_point = sp->point; |
| 1419 | rl_end = sp->end; |
| 1420 | rl_mark = sp->mark; |
| 1421 | the_line = rl_line_buffer = sp->buffer; |
| 1422 | rl_line_buffer_len = sp->buflen; |
| 1423 | rl_undo_list = sp->ul; |
| 1424 | rl_prompt = sp->prompt; |
| 1425 | |
| 1426 | rl_readline_state = sp->rlstate; |
| 1427 | rl_done = sp->done; |
| 1428 | _rl_keymap = sp->kmap; |
| 1429 | |
| 1430 | rl_last_func = sp->lastfunc; |
| 1431 | rl_insert_mode = sp->insmode; |
| 1432 | rl_editing_mode = sp->edmode; |
| 1433 | rl_executing_keyseq = sp->kseq; |
| 1434 | rl_key_sequence_length = sp->kseqlen; |
| 1435 | rl_instream = sp->inf; |
| 1436 | rl_outstream = sp->outf; |
| 1437 | rl_pending_input = sp->pendingin; |
| 1438 | rl_executing_macro = sp->macro; |
| 1439 | |
| 1440 | rl_catch_signals = sp->catchsigs; |
| 1441 | rl_catch_sigwinch = sp->catchsigwinch; |
| 1442 | |
| 1443 | rl_completion_entry_function = sp->entryfunc; |
| 1444 | rl_menu_completion_entry_function = sp->menuentryfunc; |
| 1445 | rl_ignore_some_completions_function = sp->ignorefunc; |
| 1446 | rl_attempted_completion_function = sp->attemptfunc; |
| 1447 | rl_completer_word_break_characters = sp->wordbreakchars; |
| 1448 | |
| 1449 | return (0); |
| 1450 | } |