| 1 | /* readline.c -- a general facility for reading lines of input |
| 2 | with emacs style editing and completion. */ |
| 3 | |
| 4 | /* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of the GNU Readline Library, a library for |
| 7 | reading lines of text with interactive input and history editing. |
| 8 | |
| 9 | The GNU Readline Library is free software; you can redistribute it |
| 10 | and/or modify it under the terms of the GNU General Public License |
| 11 | as published by the Free Software Foundation; either version 1, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | The GNU Readline Library is distributed in the hope that it will be |
| 15 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty |
| 16 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | The GNU General Public License is often shipped with GNU software, and |
| 20 | is generally kept in a file called COPYING or LICENSE. If you do not |
| 21 | have a copy of the license, write to the Free Software Foundation, |
| 22 | 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 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 <signal.h> |
| 51 | #include <stdio.h> |
| 52 | #include "posixjmp.h" |
| 53 | |
| 54 | /* System-specific feature definitions and include files. */ |
| 55 | #include "rldefs.h" |
| 56 | |
| 57 | #if defined (__EMX__) |
| 58 | # define INCL_DOSPROCESS |
| 59 | # include <os2.h> |
| 60 | #endif /* __EMX__ */ |
| 61 | |
| 62 | /* Some standard library routines. */ |
| 63 | #include "readline.h" |
| 64 | #include "history.h" |
| 65 | |
| 66 | #ifndef RL_LIBRARY_VERSION |
| 67 | # define RL_LIBRARY_VERSION "4.0" |
| 68 | #endif |
| 69 | |
| 70 | /* Evaluates its arguments multiple times. */ |
| 71 | #define SWAP(s, e) do { int t; t = s; s = e; e = t; } while (0) |
| 72 | |
| 73 | /* NOTE: Functions and variables prefixed with `_rl_' are |
| 74 | pseudo-global: they are global so they can be shared |
| 75 | between files in the readline library, but are not intended |
| 76 | to be visible to readline callers. */ |
| 77 | |
| 78 | /* Variables and functions imported from terminal.c */ |
| 79 | extern int _rl_init_terminal_io (); |
| 80 | extern void _rl_enable_meta_key (); |
| 81 | #ifdef _MINIX |
| 82 | extern void _rl_output_character_function (); |
| 83 | #else |
| 84 | extern int _rl_output_character_function (); |
| 85 | #endif |
| 86 | |
| 87 | extern int _rl_enable_meta; |
| 88 | extern int _rl_term_autowrap; |
| 89 | extern int screenwidth, screenheight, screenchars; |
| 90 | |
| 91 | /* Variables and functions imported from rltty.c. */ |
| 92 | extern void rl_prep_terminal (), rl_deprep_terminal (); |
| 93 | extern void rltty_set_default_bindings (); |
| 94 | |
| 95 | /* Functions imported from util.c. */ |
| 96 | extern void _rl_abort_internal (); |
| 97 | extern void rl_extend_line_buffer (); |
| 98 | extern int alphabetic (); |
| 99 | |
| 100 | /* Functions imported from bind.c. */ |
| 101 | extern void _rl_bind_if_unbound (); |
| 102 | |
| 103 | /* Functions imported from input.c. */ |
| 104 | extern int _rl_any_typein (); |
| 105 | extern void _rl_insert_typein (); |
| 106 | extern int rl_read_key (); |
| 107 | |
| 108 | /* Functions imported from nls.c */ |
| 109 | extern int _rl_init_eightbit (); |
| 110 | |
| 111 | /* Functions imported from shell.c */ |
| 112 | extern char *get_env_value (); |
| 113 | |
| 114 | /* External redisplay functions and variables from display.c */ |
| 115 | extern void _rl_move_vert (); |
| 116 | extern void _rl_update_final (); |
| 117 | extern void _rl_clear_to_eol (); |
| 118 | extern void _rl_clear_screen (); |
| 119 | extern void _rl_erase_entire_line (); |
| 120 | |
| 121 | extern void _rl_erase_at_end_of_line (); |
| 122 | extern void _rl_move_cursor_relative (); |
| 123 | |
| 124 | extern int _rl_vis_botlin; |
| 125 | extern int _rl_last_c_pos; |
| 126 | extern int _rl_horizontal_scroll_mode; |
| 127 | extern int rl_display_fixed; |
| 128 | extern int _rl_suppress_redisplay; |
| 129 | extern char *rl_display_prompt; |
| 130 | |
| 131 | /* Variables imported from complete.c. */ |
| 132 | extern char *rl_completer_word_break_characters; |
| 133 | extern char *rl_basic_word_break_characters; |
| 134 | extern int rl_completion_query_items; |
| 135 | extern int rl_complete_with_tilde_expansion; |
| 136 | |
| 137 | /* Variables and functions from macro.c. */ |
| 138 | extern void _rl_add_macro_char (); |
| 139 | extern void _rl_with_macro_input (); |
| 140 | extern int _rl_next_macro_key (); |
| 141 | extern int _rl_defining_kbd_macro; |
| 142 | |
| 143 | #if defined (VI_MODE) |
| 144 | /* Functions imported from vi_mode.c. */ |
| 145 | extern void _rl_vi_set_last (); |
| 146 | extern void _rl_vi_reset_last (); |
| 147 | extern void _rl_vi_done_inserting (); |
| 148 | extern int _rl_vi_textmod_command (); |
| 149 | extern void _rl_vi_initialize_line (); |
| 150 | #endif /* VI_MODE */ |
| 151 | |
| 152 | extern UNDO_LIST *rl_undo_list; |
| 153 | extern int _rl_doing_an_undo; |
| 154 | |
| 155 | /* Forward declarations used in this file. */ |
| 156 | void _rl_free_history_entry (); |
| 157 | |
| 158 | int _rl_dispatch (); |
| 159 | int _rl_init_argument (); |
| 160 | |
| 161 | static char *readline_internal (); |
| 162 | static void readline_initialize_everything (); |
| 163 | static void start_using_history (); |
| 164 | static void bind_arrow_keys (); |
| 165 | |
| 166 | #if !defined (__GO32__) |
| 167 | static void readline_default_bindings (); |
| 168 | #endif /* !__GO32__ */ |
| 169 | |
| 170 | #if defined (__GO32__) |
| 171 | # include <go32.h> |
| 172 | # include <pc.h> |
| 173 | # undef HANDLE_SIGNALS |
| 174 | #endif /* __GO32__ */ |
| 175 | |
| 176 | extern char *xmalloc (), *xrealloc (); |
| 177 | |
| 178 | /* **************************************************************** */ |
| 179 | /* */ |
| 180 | /* Line editing input utility */ |
| 181 | /* */ |
| 182 | /* **************************************************************** */ |
| 183 | |
| 184 | char *rl_library_version = RL_LIBRARY_VERSION; |
| 185 | |
| 186 | /* A pointer to the keymap that is currently in use. |
| 187 | By default, it is the standard emacs keymap. */ |
| 188 | Keymap _rl_keymap = emacs_standard_keymap; |
| 189 | |
| 190 | /* The current style of editing. */ |
| 191 | int rl_editing_mode = emacs_mode; |
| 192 | |
| 193 | /* Non-zero if we called this function from _rl_dispatch(). It's present |
| 194 | so functions can find out whether they were called from a key binding |
| 195 | or directly from an application. */ |
| 196 | int rl_dispatching; |
| 197 | |
| 198 | /* Non-zero if the previous command was a kill command. */ |
| 199 | int _rl_last_command_was_kill = 0; |
| 200 | |
| 201 | /* The current value of the numeric argument specified by the user. */ |
| 202 | int rl_numeric_arg = 1; |
| 203 | |
| 204 | /* Non-zero if an argument was typed. */ |
| 205 | int rl_explicit_arg = 0; |
| 206 | |
| 207 | /* Temporary value used while generating the argument. */ |
| 208 | int rl_arg_sign = 1; |
| 209 | |
| 210 | /* Non-zero means we have been called at least once before. */ |
| 211 | static int rl_initialized; |
| 212 | |
| 213 | /* If non-zero, this program is running in an EMACS buffer. */ |
| 214 | static int running_in_emacs; |
| 215 | |
| 216 | /* The current offset in the current input line. */ |
| 217 | int rl_point; |
| 218 | |
| 219 | /* Mark in the current input line. */ |
| 220 | int rl_mark; |
| 221 | |
| 222 | /* Length of the current input line. */ |
| 223 | int rl_end; |
| 224 | |
| 225 | /* Make this non-zero to return the current input_line. */ |
| 226 | int rl_done; |
| 227 | |
| 228 | /* The last function executed by readline. */ |
| 229 | Function *rl_last_func = (Function *)NULL; |
| 230 | |
| 231 | /* Top level environment for readline_internal (). */ |
| 232 | procenv_t readline_top_level; |
| 233 | |
| 234 | /* The streams we interact with. */ |
| 235 | FILE *_rl_in_stream, *_rl_out_stream; |
| 236 | |
| 237 | /* The names of the streams that we do input and output to. */ |
| 238 | FILE *rl_instream = (FILE *)NULL; |
| 239 | FILE *rl_outstream = (FILE *)NULL; |
| 240 | |
| 241 | /* Non-zero means echo characters as they are read. */ |
| 242 | int readline_echoing_p = 1; |
| 243 | |
| 244 | /* Current prompt. */ |
| 245 | char *rl_prompt; |
| 246 | int rl_visible_prompt_length = 0; |
| 247 | |
| 248 | /* The number of characters read in order to type this complete command. */ |
| 249 | int rl_key_sequence_length = 0; |
| 250 | |
| 251 | /* If non-zero, then this is the address of a function to call just |
| 252 | before readline_internal_setup () prints the first prompt. */ |
| 253 | Function *rl_startup_hook = (Function *)NULL; |
| 254 | |
| 255 | /* If non-zero, this is the address of a function to call just before |
| 256 | readline_internal_setup () returns and readline_internal starts |
| 257 | reading input characters. */ |
| 258 | Function *rl_pre_input_hook = (Function *)NULL; |
| 259 | |
| 260 | /* What we use internally. You should always refer to RL_LINE_BUFFER. */ |
| 261 | static char *the_line; |
| 262 | |
| 263 | /* The character that can generate an EOF. Really read from |
| 264 | the terminal driver... just defaulted here. */ |
| 265 | int _rl_eof_char = CTRL ('D'); |
| 266 | |
| 267 | /* Non-zero makes this the next keystroke to read. */ |
| 268 | int rl_pending_input = 0; |
| 269 | |
| 270 | /* Pointer to a useful terminal name. */ |
| 271 | char *rl_terminal_name = (char *)NULL; |
| 272 | |
| 273 | /* Non-zero means to always use horizontal scrolling in line display. */ |
| 274 | int _rl_horizontal_scroll_mode = 0; |
| 275 | |
| 276 | /* Non-zero means to display an asterisk at the starts of history lines |
| 277 | which have been modified. */ |
| 278 | int _rl_mark_modified_lines = 0; |
| 279 | |
| 280 | /* The style of `bell' notification preferred. This can be set to NO_BELL, |
| 281 | AUDIBLE_BELL, or VISIBLE_BELL. */ |
| 282 | int _rl_bell_preference = AUDIBLE_BELL; |
| 283 | |
| 284 | /* String inserted into the line by rl_insert_comment (). */ |
| 285 | char *_rl_comment_begin; |
| 286 | |
| 287 | /* Keymap holding the function currently being executed. */ |
| 288 | Keymap rl_executing_keymap; |
| 289 | |
| 290 | /* Non-zero means to erase entire line, including prompt, on empty input lines. */ |
| 291 | int rl_erase_empty_line = 0; |
| 292 | |
| 293 | /* Line buffer and maintenence. */ |
| 294 | char *rl_line_buffer = (char *)NULL; |
| 295 | int rl_line_buffer_len = 0; |
| 296 | |
| 297 | /* Forward declarations used by the display and termcap code. */ |
| 298 | |
| 299 | /* **************************************************************** */ |
| 300 | /* */ |
| 301 | /* `Forward' declarations */ |
| 302 | /* */ |
| 303 | /* **************************************************************** */ |
| 304 | |
| 305 | /* Non-zero means do not parse any lines other than comments and |
| 306 | parser directives. */ |
| 307 | unsigned char _rl_parsing_conditionalized_out = 0; |
| 308 | |
| 309 | /* Non-zero means to convert characters with the meta bit set to |
| 310 | escape-prefixed characters so we can indirect through |
| 311 | emacs_meta_keymap or vi_escape_keymap. */ |
| 312 | int _rl_convert_meta_chars_to_ascii = 1; |
| 313 | |
| 314 | /* Non-zero means to output characters with the meta bit set directly |
| 315 | rather than as a meta-prefixed escape sequence. */ |
| 316 | int _rl_output_meta_chars = 0; |
| 317 | |
| 318 | /* **************************************************************** */ |
| 319 | /* */ |
| 320 | /* Top Level Functions */ |
| 321 | /* */ |
| 322 | /* **************************************************************** */ |
| 323 | |
| 324 | /* Non-zero means treat 0200 bit in terminal input as Meta bit. */ |
| 325 | int _rl_meta_flag = 0; /* Forward declaration */ |
| 326 | |
| 327 | /* Read a line of input. Prompt with PROMPT. An empty PROMPT means |
| 328 | none. A return value of NULL means that EOF was encountered. */ |
| 329 | char * |
| 330 | readline (prompt) |
| 331 | char *prompt; |
| 332 | { |
| 333 | char *value; |
| 334 | |
| 335 | rl_prompt = prompt; |
| 336 | |
| 337 | /* If we are at EOF return a NULL string. */ |
| 338 | if (rl_pending_input == EOF) |
| 339 | { |
| 340 | rl_pending_input = 0; |
| 341 | return ((char *)NULL); |
| 342 | } |
| 343 | |
| 344 | rl_visible_prompt_length = rl_expand_prompt (rl_prompt); |
| 345 | |
| 346 | rl_initialize (); |
| 347 | (*rl_prep_term_function) (_rl_meta_flag); |
| 348 | |
| 349 | #if defined (HANDLE_SIGNALS) |
| 350 | rl_set_signals (); |
| 351 | #endif |
| 352 | |
| 353 | value = readline_internal (); |
| 354 | (*rl_deprep_term_function) (); |
| 355 | |
| 356 | #if defined (HANDLE_SIGNALS) |
| 357 | rl_clear_signals (); |
| 358 | #endif |
| 359 | |
| 360 | return (value); |
| 361 | } |
| 362 | |
| 363 | #if defined (READLINE_CALLBACKS) |
| 364 | # define STATIC_CALLBACK |
| 365 | #else |
| 366 | # define STATIC_CALLBACK static |
| 367 | #endif |
| 368 | |
| 369 | STATIC_CALLBACK void |
| 370 | readline_internal_setup () |
| 371 | { |
| 372 | _rl_in_stream = rl_instream; |
| 373 | _rl_out_stream = rl_outstream; |
| 374 | |
| 375 | if (rl_startup_hook) |
| 376 | (*rl_startup_hook) (); |
| 377 | |
| 378 | if (readline_echoing_p == 0) |
| 379 | { |
| 380 | if (rl_prompt) |
| 381 | { |
| 382 | fprintf (_rl_out_stream, "%s", rl_prompt); |
| 383 | fflush (_rl_out_stream); |
| 384 | } |
| 385 | } |
| 386 | else |
| 387 | { |
| 388 | rl_on_new_line (); |
| 389 | (*rl_redisplay_function) (); |
| 390 | #if defined (VI_MODE) |
| 391 | if (rl_editing_mode == vi_mode) |
| 392 | rl_vi_insertion_mode (1, 0); |
| 393 | #endif /* VI_MODE */ |
| 394 | } |
| 395 | |
| 396 | if (rl_pre_input_hook) |
| 397 | (*rl_pre_input_hook) (); |
| 398 | } |
| 399 | |
| 400 | STATIC_CALLBACK char * |
| 401 | readline_internal_teardown (eof) |
| 402 | int eof; |
| 403 | { |
| 404 | char *temp; |
| 405 | HIST_ENTRY *entry; |
| 406 | |
| 407 | /* Restore the original of this history line, iff the line that we |
| 408 | are editing was originally in the history, AND the line has changed. */ |
| 409 | entry = current_history (); |
| 410 | |
| 411 | if (entry && rl_undo_list) |
| 412 | { |
| 413 | temp = savestring (the_line); |
| 414 | rl_revert_line (1, 0); |
| 415 | entry = replace_history_entry (where_history (), the_line, (histdata_t)NULL); |
| 416 | _rl_free_history_entry (entry); |
| 417 | |
| 418 | strcpy (the_line, temp); |
| 419 | free (temp); |
| 420 | } |
| 421 | |
| 422 | /* At any rate, it is highly likely that this line has an undo list. Get |
| 423 | rid of it now. */ |
| 424 | if (rl_undo_list) |
| 425 | free_undo_list (); |
| 426 | |
| 427 | return (eof ? (char *)NULL : savestring (the_line)); |
| 428 | } |
| 429 | |
| 430 | STATIC_CALLBACK int |
| 431 | #if defined (READLINE_CALLBACKS) |
| 432 | readline_internal_char () |
| 433 | #else |
| 434 | readline_internal_charloop () |
| 435 | #endif |
| 436 | { |
| 437 | static int lastc, eof_found; |
| 438 | int c, code, lk; |
| 439 | |
| 440 | lastc = -1; |
| 441 | eof_found = 0; |
| 442 | |
| 443 | #if !defined (READLINE_CALLBACKS) |
| 444 | while (rl_done == 0) |
| 445 | { |
| 446 | #endif |
| 447 | lk = _rl_last_command_was_kill; |
| 448 | |
| 449 | code = setjmp (readline_top_level); |
| 450 | |
| 451 | if (code) |
| 452 | (*rl_redisplay_function) (); |
| 453 | |
| 454 | if (rl_pending_input == 0) |
| 455 | { |
| 456 | /* Then initialize the argument and number of keys read. */ |
| 457 | _rl_init_argument (); |
| 458 | rl_key_sequence_length = 0; |
| 459 | } |
| 460 | |
| 461 | c = rl_read_key (); |
| 462 | |
| 463 | /* EOF typed to a non-blank line is a <NL>. */ |
| 464 | if (c == EOF && rl_end) |
| 465 | c = NEWLINE; |
| 466 | |
| 467 | /* The character _rl_eof_char typed to blank line, and not as the |
| 468 | previous character is interpreted as EOF. */ |
| 469 | if (((c == _rl_eof_char && lastc != c) || c == EOF) && !rl_end) |
| 470 | { |
| 471 | #if defined (READLINE_CALLBACKS) |
| 472 | return (rl_done = 1); |
| 473 | #else |
| 474 | eof_found = 1; |
| 475 | break; |
| 476 | #endif |
| 477 | } |
| 478 | |
| 479 | lastc = c; |
| 480 | _rl_dispatch (c, _rl_keymap); |
| 481 | |
| 482 | /* If there was no change in _rl_last_command_was_kill, then no kill |
| 483 | has taken place. Note that if input is pending we are reading |
| 484 | a prefix command, so nothing has changed yet. */ |
| 485 | if (rl_pending_input == 0 && lk == _rl_last_command_was_kill) |
| 486 | _rl_last_command_was_kill = 0; |
| 487 | |
| 488 | #if defined (VI_MODE) |
| 489 | /* In vi mode, when you exit insert mode, the cursor moves back |
| 490 | over the previous character. We explicitly check for that here. */ |
| 491 | if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap) |
| 492 | rl_vi_check (); |
| 493 | #endif /* VI_MODE */ |
| 494 | |
| 495 | if (rl_done == 0) |
| 496 | (*rl_redisplay_function) (); |
| 497 | |
| 498 | /* If the application writer has told us to erase the entire line if |
| 499 | the only character typed was something bound to rl_newline, do so. */ |
| 500 | if (rl_erase_empty_line && rl_done && rl_last_func == rl_newline && |
| 501 | rl_point == 0 && rl_end == 0) |
| 502 | _rl_erase_entire_line (); |
| 503 | |
| 504 | #if defined (READLINE_CALLBACKS) |
| 505 | return 0; |
| 506 | #else |
| 507 | } |
| 508 | |
| 509 | return (eof_found); |
| 510 | #endif |
| 511 | } |
| 512 | |
| 513 | #if defined (READLINE_CALLBACKS) |
| 514 | static int |
| 515 | readline_internal_charloop () |
| 516 | { |
| 517 | int eof = 1; |
| 518 | |
| 519 | while (rl_done == 0) |
| 520 | eof = readline_internal_char (); |
| 521 | return (eof); |
| 522 | } |
| 523 | #endif /* READLINE_CALLBACKS */ |
| 524 | |
| 525 | /* Read a line of input from the global rl_instream, doing output on |
| 526 | the global rl_outstream. |
| 527 | If rl_prompt is non-null, then that is our prompt. */ |
| 528 | static char * |
| 529 | readline_internal () |
| 530 | { |
| 531 | int eof; |
| 532 | |
| 533 | readline_internal_setup (); |
| 534 | eof = readline_internal_charloop (); |
| 535 | return (readline_internal_teardown (eof)); |
| 536 | } |
| 537 | |
| 538 | void |
| 539 | _rl_init_line_state () |
| 540 | { |
| 541 | rl_point = rl_end = 0; |
| 542 | the_line = rl_line_buffer; |
| 543 | the_line[0] = 0; |
| 544 | } |
| 545 | |
| 546 | void |
| 547 | _rl_set_the_line () |
| 548 | { |
| 549 | the_line = rl_line_buffer; |
| 550 | } |
| 551 | |
| 552 | /* Do the command associated with KEY in MAP. |
| 553 | If the associated command is really a keymap, then read |
| 554 | another key, and dispatch into that map. */ |
| 555 | int |
| 556 | _rl_dispatch (key, map) |
| 557 | register int key; |
| 558 | Keymap map; |
| 559 | { |
| 560 | int r, newkey; |
| 561 | char *macro; |
| 562 | Function *func; |
| 563 | |
| 564 | if (META_CHAR (key) && _rl_convert_meta_chars_to_ascii) |
| 565 | { |
| 566 | if (map[ESC].type == ISKMAP) |
| 567 | { |
| 568 | if (_rl_defining_kbd_macro) |
| 569 | _rl_add_macro_char (ESC); |
| 570 | map = FUNCTION_TO_KEYMAP (map, ESC); |
| 571 | key = UNMETA (key); |
| 572 | rl_key_sequence_length += 2; |
| 573 | return (_rl_dispatch (key, map)); |
| 574 | } |
| 575 | else |
| 576 | ding (); |
| 577 | return 0; |
| 578 | } |
| 579 | |
| 580 | if (_rl_defining_kbd_macro) |
| 581 | _rl_add_macro_char (key); |
| 582 | |
| 583 | r = 0; |
| 584 | switch (map[key].type) |
| 585 | { |
| 586 | case ISFUNC: |
| 587 | func = map[key].function; |
| 588 | if (func != (Function *)NULL) |
| 589 | { |
| 590 | /* Special case rl_do_lowercase_version (). */ |
| 591 | if (func == rl_do_lowercase_version) |
| 592 | return (_rl_dispatch (_rl_to_lower (key), map)); |
| 593 | |
| 594 | rl_executing_keymap = map; |
| 595 | |
| 596 | #if 0 |
| 597 | _rl_suppress_redisplay = (map[key].function == rl_insert) && _rl_input_available (); |
| 598 | #endif |
| 599 | |
| 600 | rl_dispatching = 1; |
| 601 | r = (*map[key].function)(rl_numeric_arg * rl_arg_sign, key); |
| 602 | rl_dispatching = 0; |
| 603 | |
| 604 | /* If we have input pending, then the last command was a prefix |
| 605 | command. Don't change the state of rl_last_func. Otherwise, |
| 606 | remember the last command executed in this variable. */ |
| 607 | if (!rl_pending_input && map[key].function != rl_digit_argument) |
| 608 | rl_last_func = map[key].function; |
| 609 | } |
| 610 | else |
| 611 | { |
| 612 | _rl_abort_internal (); |
| 613 | return -1; |
| 614 | } |
| 615 | break; |
| 616 | |
| 617 | case ISKMAP: |
| 618 | if (map[key].function != (Function *)NULL) |
| 619 | { |
| 620 | rl_key_sequence_length++; |
| 621 | newkey = rl_read_key (); |
| 622 | r = _rl_dispatch (newkey, FUNCTION_TO_KEYMAP (map, key)); |
| 623 | } |
| 624 | else |
| 625 | { |
| 626 | _rl_abort_internal (); |
| 627 | return -1; |
| 628 | } |
| 629 | break; |
| 630 | |
| 631 | case ISMACR: |
| 632 | if (map[key].function != (Function *)NULL) |
| 633 | { |
| 634 | macro = savestring ((char *)map[key].function); |
| 635 | _rl_with_macro_input (macro); |
| 636 | return 0; |
| 637 | } |
| 638 | break; |
| 639 | } |
| 640 | #if defined (VI_MODE) |
| 641 | if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap && |
| 642 | _rl_vi_textmod_command (key)) |
| 643 | _rl_vi_set_last (key, rl_numeric_arg, rl_arg_sign); |
| 644 | #endif |
| 645 | return (r); |
| 646 | } |
| 647 | |
| 648 | /* **************************************************************** */ |
| 649 | /* */ |
| 650 | /* Initializations */ |
| 651 | /* */ |
| 652 | /* **************************************************************** */ |
| 653 | |
| 654 | /* Initialize readline (and terminal if not already). */ |
| 655 | int |
| 656 | rl_initialize () |
| 657 | { |
| 658 | /* If we have never been called before, initialize the |
| 659 | terminal and data structures. */ |
| 660 | if (!rl_initialized) |
| 661 | { |
| 662 | readline_initialize_everything (); |
| 663 | rl_initialized++; |
| 664 | } |
| 665 | |
| 666 | /* Initalize the current line information. */ |
| 667 | _rl_init_line_state (); |
| 668 | |
| 669 | /* We aren't done yet. We haven't even gotten started yet! */ |
| 670 | rl_done = 0; |
| 671 | |
| 672 | /* Tell the history routines what is going on. */ |
| 673 | start_using_history (); |
| 674 | |
| 675 | /* Make the display buffer match the state of the line. */ |
| 676 | rl_reset_line_state (); |
| 677 | |
| 678 | /* No such function typed yet. */ |
| 679 | rl_last_func = (Function *)NULL; |
| 680 | |
| 681 | /* Parsing of key-bindings begins in an enabled state. */ |
| 682 | _rl_parsing_conditionalized_out = 0; |
| 683 | |
| 684 | #if defined (VI_MODE) |
| 685 | if (rl_editing_mode == vi_mode) |
| 686 | _rl_vi_initialize_line (); |
| 687 | #endif |
| 688 | |
| 689 | return 0; |
| 690 | } |
| 691 | |
| 692 | #if defined (__EMX__) |
| 693 | static void |
| 694 | _emx_build_environ () |
| 695 | { |
| 696 | TIB *tibp; |
| 697 | PIB *pibp; |
| 698 | char *t, **tp; |
| 699 | int c; |
| 700 | |
| 701 | DosGetInfoBlocks (&tibp, &pibp); |
| 702 | t = pibp->pib_pchenv; |
| 703 | for (c = 1; *t; c++) |
| 704 | t += strlen (t) + 1; |
| 705 | tp = environ = (char **)xmalloc ((c + 1) * sizeof (char *)); |
| 706 | t = pibp->pib_pchenv; |
| 707 | while (*t) |
| 708 | { |
| 709 | *tp++ = t; |
| 710 | t += strlen (t) + 1; |
| 711 | } |
| 712 | *tp = 0; |
| 713 | } |
| 714 | #endif /* __EMX__ */ |
| 715 | |
| 716 | /* Initialize the entire state of the world. */ |
| 717 | static void |
| 718 | readline_initialize_everything () |
| 719 | { |
| 720 | #if defined (__EMX__) |
| 721 | if (environ == 0) |
| 722 | _emx_build_environ (); |
| 723 | #endif |
| 724 | |
| 725 | /* Find out if we are running in Emacs. */ |
| 726 | running_in_emacs = get_env_value ("EMACS") != (char *)0; |
| 727 | |
| 728 | /* Set up input and output if they are not already set up. */ |
| 729 | if (!rl_instream) |
| 730 | rl_instream = stdin; |
| 731 | |
| 732 | if (!rl_outstream) |
| 733 | rl_outstream = stdout; |
| 734 | |
| 735 | /* Bind _rl_in_stream and _rl_out_stream immediately. These values |
| 736 | may change, but they may also be used before readline_internal () |
| 737 | is called. */ |
| 738 | _rl_in_stream = rl_instream; |
| 739 | _rl_out_stream = rl_outstream; |
| 740 | |
| 741 | /* Allocate data structures. */ |
| 742 | if (rl_line_buffer == 0) |
| 743 | rl_line_buffer = xmalloc (rl_line_buffer_len = DEFAULT_BUFFER_SIZE); |
| 744 | |
| 745 | /* Initialize the terminal interface. */ |
| 746 | _rl_init_terminal_io ((char *)NULL); |
| 747 | |
| 748 | #if !defined (__GO32__) |
| 749 | /* Bind tty characters to readline functions. */ |
| 750 | readline_default_bindings (); |
| 751 | #endif /* !__GO32__ */ |
| 752 | |
| 753 | /* Initialize the function names. */ |
| 754 | rl_initialize_funmap (); |
| 755 | |
| 756 | /* Decide whether we should automatically go into eight-bit mode. */ |
| 757 | _rl_init_eightbit (); |
| 758 | |
| 759 | /* Read in the init file. */ |
| 760 | rl_read_init_file ((char *)NULL); |
| 761 | |
| 762 | /* XXX */ |
| 763 | if (_rl_horizontal_scroll_mode && _rl_term_autowrap) |
| 764 | { |
| 765 | screenwidth--; |
| 766 | screenchars -= screenheight; |
| 767 | } |
| 768 | |
| 769 | /* Override the effect of any `set keymap' assignments in the |
| 770 | inputrc file. */ |
| 771 | rl_set_keymap_from_edit_mode (); |
| 772 | |
| 773 | /* Try to bind a common arrow key prefix, if not already bound. */ |
| 774 | bind_arrow_keys (); |
| 775 | |
| 776 | /* Enable the meta key, if this terminal has one. */ |
| 777 | if (_rl_enable_meta) |
| 778 | _rl_enable_meta_key (); |
| 779 | |
| 780 | /* If the completion parser's default word break characters haven't |
| 781 | been set yet, then do so now. */ |
| 782 | if (rl_completer_word_break_characters == (char *)NULL) |
| 783 | rl_completer_word_break_characters = rl_basic_word_break_characters; |
| 784 | } |
| 785 | |
| 786 | /* If this system allows us to look at the values of the regular |
| 787 | input editing characters, then bind them to their readline |
| 788 | equivalents, iff the characters are not bound to keymaps. */ |
| 789 | static void |
| 790 | readline_default_bindings () |
| 791 | { |
| 792 | rltty_set_default_bindings (_rl_keymap); |
| 793 | } |
| 794 | |
| 795 | static void |
| 796 | bind_arrow_keys_internal () |
| 797 | { |
| 798 | Function *f; |
| 799 | |
| 800 | f = rl_function_of_keyseq ("\033[A", _rl_keymap, (int *)NULL); |
| 801 | if (!f || f == rl_do_lowercase_version) |
| 802 | { |
| 803 | _rl_bind_if_unbound ("\033[A", rl_get_previous_history); |
| 804 | _rl_bind_if_unbound ("\033[B", rl_get_next_history); |
| 805 | _rl_bind_if_unbound ("\033[C", rl_forward); |
| 806 | _rl_bind_if_unbound ("\033[D", rl_backward); |
| 807 | } |
| 808 | |
| 809 | f = rl_function_of_keyseq ("\033OA", _rl_keymap, (int *)NULL); |
| 810 | if (!f || f == rl_do_lowercase_version) |
| 811 | { |
| 812 | _rl_bind_if_unbound ("\033OA", rl_get_previous_history); |
| 813 | _rl_bind_if_unbound ("\033OB", rl_get_next_history); |
| 814 | _rl_bind_if_unbound ("\033OC", rl_forward); |
| 815 | _rl_bind_if_unbound ("\033OD", rl_backward); |
| 816 | } |
| 817 | } |
| 818 | |
| 819 | /* Try and bind the common arrow key prefix after giving termcap and |
| 820 | the inputrc file a chance to bind them and create `real' keymaps |
| 821 | for the arrow key prefix. */ |
| 822 | static void |
| 823 | bind_arrow_keys () |
| 824 | { |
| 825 | Keymap xkeymap; |
| 826 | |
| 827 | xkeymap = _rl_keymap; |
| 828 | |
| 829 | _rl_keymap = emacs_standard_keymap; |
| 830 | bind_arrow_keys_internal (); |
| 831 | |
| 832 | #if defined (VI_MODE) |
| 833 | _rl_keymap = vi_movement_keymap; |
| 834 | bind_arrow_keys_internal (); |
| 835 | #endif |
| 836 | |
| 837 | _rl_keymap = xkeymap; |
| 838 | } |
| 839 | |
| 840 | \f |
| 841 | /* **************************************************************** */ |
| 842 | /* */ |
| 843 | /* Numeric Arguments */ |
| 844 | /* */ |
| 845 | /* **************************************************************** */ |
| 846 | |
| 847 | /* Handle C-u style numeric args, as well as M--, and M-digits. */ |
| 848 | static int |
| 849 | rl_digit_loop () |
| 850 | { |
| 851 | int key, c, sawminus, sawdigits; |
| 852 | |
| 853 | rl_save_prompt (); |
| 854 | |
| 855 | sawminus = sawdigits = 0; |
| 856 | while (1) |
| 857 | { |
| 858 | if (rl_numeric_arg > 1000000) |
| 859 | { |
| 860 | sawdigits = rl_explicit_arg = rl_numeric_arg = 0; |
| 861 | ding (); |
| 862 | rl_restore_prompt (); |
| 863 | rl_clear_message (); |
| 864 | return 1; |
| 865 | } |
| 866 | rl_message ("(arg: %d) ", rl_arg_sign * rl_numeric_arg); |
| 867 | key = c = rl_read_key (); |
| 868 | |
| 869 | /* If we see a key bound to `universal-argument' after seeing digits, |
| 870 | it ends the argument but is otherwise ignored. */ |
| 871 | if (_rl_keymap[c].type == ISFUNC && |
| 872 | _rl_keymap[c].function == rl_universal_argument) |
| 873 | { |
| 874 | if (sawdigits == 0) |
| 875 | { |
| 876 | rl_numeric_arg *= 4; |
| 877 | continue; |
| 878 | } |
| 879 | else |
| 880 | { |
| 881 | key = rl_read_key (); |
| 882 | rl_restore_prompt (); |
| 883 | rl_clear_message (); |
| 884 | return (_rl_dispatch (key, _rl_keymap)); |
| 885 | } |
| 886 | } |
| 887 | |
| 888 | c = UNMETA (c); |
| 889 | |
| 890 | if (_rl_digit_p (c)) |
| 891 | { |
| 892 | rl_numeric_arg = rl_explicit_arg ? (rl_numeric_arg * 10) + c - '0' : c - '0'; |
| 893 | sawdigits = rl_explicit_arg = 1; |
| 894 | } |
| 895 | else if (c == '-' && rl_explicit_arg == 0) |
| 896 | { |
| 897 | rl_numeric_arg = sawminus = 1; |
| 898 | rl_arg_sign = -1; |
| 899 | } |
| 900 | else |
| 901 | { |
| 902 | /* Make M-- command equivalent to M--1 command. */ |
| 903 | if (sawminus && rl_numeric_arg == 1 && rl_explicit_arg == 0) |
| 904 | rl_explicit_arg = 1; |
| 905 | rl_restore_prompt (); |
| 906 | rl_clear_message (); |
| 907 | return (_rl_dispatch (key, _rl_keymap)); |
| 908 | } |
| 909 | } |
| 910 | |
| 911 | return 0; |
| 912 | } |
| 913 | |
| 914 | /* Add the current digit to the argument in progress. */ |
| 915 | int |
| 916 | rl_digit_argument (ignore, key) |
| 917 | int ignore, key; |
| 918 | { |
| 919 | rl_pending_input = key; |
| 920 | return (rl_digit_loop ()); |
| 921 | } |
| 922 | |
| 923 | /* What to do when you abort reading an argument. */ |
| 924 | int |
| 925 | rl_discard_argument () |
| 926 | { |
| 927 | ding (); |
| 928 | rl_clear_message (); |
| 929 | _rl_init_argument (); |
| 930 | return 0; |
| 931 | } |
| 932 | |
| 933 | /* Create a default argument. */ |
| 934 | int |
| 935 | _rl_init_argument () |
| 936 | { |
| 937 | rl_numeric_arg = rl_arg_sign = 1; |
| 938 | rl_explicit_arg = 0; |
| 939 | return 0; |
| 940 | } |
| 941 | |
| 942 | /* C-u, universal argument. Multiply the current argument by 4. |
| 943 | Read a key. If the key has nothing to do with arguments, then |
| 944 | dispatch on it. If the key is the abort character then abort. */ |
| 945 | int |
| 946 | rl_universal_argument (count, key) |
| 947 | int count, key; |
| 948 | { |
| 949 | rl_numeric_arg *= 4; |
| 950 | return (rl_digit_loop ()); |
| 951 | } |
| 952 | |
| 953 | /* **************************************************************** */ |
| 954 | /* */ |
| 955 | /* Insert and Delete */ |
| 956 | /* */ |
| 957 | /* **************************************************************** */ |
| 958 | |
| 959 | /* Insert a string of text into the line at point. This is the only |
| 960 | way that you should do insertion. rl_insert () calls this |
| 961 | function. */ |
| 962 | int |
| 963 | rl_insert_text (string) |
| 964 | char *string; |
| 965 | { |
| 966 | register int i, l = strlen (string); |
| 967 | |
| 968 | if (rl_end + l >= rl_line_buffer_len) |
| 969 | rl_extend_line_buffer (rl_end + l); |
| 970 | |
| 971 | for (i = rl_end; i >= rl_point; i--) |
| 972 | the_line[i + l] = the_line[i]; |
| 973 | strncpy (the_line + rl_point, string, l); |
| 974 | |
| 975 | /* Remember how to undo this if we aren't undoing something. */ |
| 976 | if (!_rl_doing_an_undo) |
| 977 | { |
| 978 | /* If possible and desirable, concatenate the undos. */ |
| 979 | if ((l == 1) && |
| 980 | rl_undo_list && |
| 981 | (rl_undo_list->what == UNDO_INSERT) && |
| 982 | (rl_undo_list->end == rl_point) && |
| 983 | (rl_undo_list->end - rl_undo_list->start < 20)) |
| 984 | rl_undo_list->end++; |
| 985 | else |
| 986 | rl_add_undo (UNDO_INSERT, rl_point, rl_point + l, (char *)NULL); |
| 987 | } |
| 988 | rl_point += l; |
| 989 | rl_end += l; |
| 990 | the_line[rl_end] = '\0'; |
| 991 | return l; |
| 992 | } |
| 993 | |
| 994 | /* Delete the string between FROM and TO. FROM is |
| 995 | inclusive, TO is not. */ |
| 996 | int |
| 997 | rl_delete_text (from, to) |
| 998 | int from, to; |
| 999 | { |
| 1000 | register char *text; |
| 1001 | register int diff, i; |
| 1002 | |
| 1003 | /* Fix it if the caller is confused. */ |
| 1004 | if (from > to) |
| 1005 | SWAP (from, to); |
| 1006 | |
| 1007 | /* fix boundaries */ |
| 1008 | if (to > rl_end) |
| 1009 | { |
| 1010 | to = rl_end; |
| 1011 | if (from > to) |
| 1012 | from = to; |
| 1013 | } |
| 1014 | |
| 1015 | text = rl_copy_text (from, to); |
| 1016 | |
| 1017 | /* Some versions of strncpy() can't handle overlapping arguments. */ |
| 1018 | diff = to - from; |
| 1019 | for (i = from; i < rl_end - diff; i++) |
| 1020 | the_line[i] = the_line[i + diff]; |
| 1021 | |
| 1022 | /* Remember how to undo this delete. */ |
| 1023 | if (_rl_doing_an_undo == 0) |
| 1024 | rl_add_undo (UNDO_DELETE, from, to, text); |
| 1025 | else |
| 1026 | free (text); |
| 1027 | |
| 1028 | rl_end -= diff; |
| 1029 | the_line[rl_end] = '\0'; |
| 1030 | return (diff); |
| 1031 | } |
| 1032 | |
| 1033 | /* Fix up point so that it is within the line boundaries after killing |
| 1034 | text. If FIX_MARK_TOO is non-zero, the mark is forced within line |
| 1035 | boundaries also. */ |
| 1036 | |
| 1037 | #define _RL_FIX_POINT(x) \ |
| 1038 | do { \ |
| 1039 | if (x > rl_end) \ |
| 1040 | x = rl_end; \ |
| 1041 | else if (x < 0) \ |
| 1042 | x = 0; \ |
| 1043 | } while (0) |
| 1044 | |
| 1045 | void |
| 1046 | _rl_fix_point (fix_mark_too) |
| 1047 | int fix_mark_too; |
| 1048 | { |
| 1049 | _RL_FIX_POINT (rl_point); |
| 1050 | if (fix_mark_too) |
| 1051 | _RL_FIX_POINT (rl_mark); |
| 1052 | } |
| 1053 | #undef _RL_FIX_POINT |
| 1054 | |
| 1055 | void |
| 1056 | _rl_replace_text (text, start, end) |
| 1057 | char *text; |
| 1058 | int start, end; |
| 1059 | { |
| 1060 | rl_begin_undo_group (); |
| 1061 | rl_delete_text (start, end + 1); |
| 1062 | rl_point = start; |
| 1063 | rl_insert_text (text); |
| 1064 | rl_end_undo_group (); |
| 1065 | } |
| 1066 | |
| 1067 | /* **************************************************************** */ |
| 1068 | /* */ |
| 1069 | /* Readline character functions */ |
| 1070 | /* */ |
| 1071 | /* **************************************************************** */ |
| 1072 | |
| 1073 | /* This is not a gap editor, just a stupid line input routine. No hair |
| 1074 | is involved in writing any of the functions, and none should be. */ |
| 1075 | |
| 1076 | /* Note that: |
| 1077 | |
| 1078 | rl_end is the place in the string that we would place '\0'; |
| 1079 | i.e., it is always safe to place '\0' there. |
| 1080 | |
| 1081 | rl_point is the place in the string where the cursor is. Sometimes |
| 1082 | this is the same as rl_end. |
| 1083 | |
| 1084 | Any command that is called interactively receives two arguments. |
| 1085 | The first is a count: the numeric arg pased to this command. |
| 1086 | The second is the key which invoked this command. |
| 1087 | */ |
| 1088 | |
| 1089 | /* **************************************************************** */ |
| 1090 | /* */ |
| 1091 | /* Movement Commands */ |
| 1092 | /* */ |
| 1093 | /* **************************************************************** */ |
| 1094 | |
| 1095 | /* Note that if you `optimize' the display for these functions, you cannot |
| 1096 | use said functions in other functions which do not do optimizing display. |
| 1097 | I.e., you will have to update the data base for rl_redisplay, and you |
| 1098 | might as well let rl_redisplay do that job. */ |
| 1099 | |
| 1100 | /* Move forward COUNT characters. */ |
| 1101 | int |
| 1102 | rl_forward (count, key) |
| 1103 | int count, key; |
| 1104 | { |
| 1105 | if (count < 0) |
| 1106 | rl_backward (-count, key); |
| 1107 | else if (count > 0) |
| 1108 | { |
| 1109 | int end = rl_point + count; |
| 1110 | #if defined (VI_MODE) |
| 1111 | int lend = rl_end - (rl_editing_mode == vi_mode); |
| 1112 | #else |
| 1113 | int lend = rl_end; |
| 1114 | #endif |
| 1115 | |
| 1116 | if (end > lend) |
| 1117 | { |
| 1118 | rl_point = lend; |
| 1119 | ding (); |
| 1120 | } |
| 1121 | else |
| 1122 | rl_point = end; |
| 1123 | } |
| 1124 | return 0; |
| 1125 | } |
| 1126 | |
| 1127 | /* Move backward COUNT characters. */ |
| 1128 | int |
| 1129 | rl_backward (count, key) |
| 1130 | int count, key; |
| 1131 | { |
| 1132 | if (count < 0) |
| 1133 | rl_forward (-count, key); |
| 1134 | else if (count > 0) |
| 1135 | { |
| 1136 | if (rl_point < count) |
| 1137 | { |
| 1138 | rl_point = 0; |
| 1139 | ding (); |
| 1140 | } |
| 1141 | else |
| 1142 | rl_point -= count; |
| 1143 | } |
| 1144 | return 0; |
| 1145 | } |
| 1146 | |
| 1147 | /* Move to the beginning of the line. */ |
| 1148 | int |
| 1149 | rl_beg_of_line (count, key) |
| 1150 | int count, key; |
| 1151 | { |
| 1152 | rl_point = 0; |
| 1153 | return 0; |
| 1154 | } |
| 1155 | |
| 1156 | /* Move to the end of the line. */ |
| 1157 | int |
| 1158 | rl_end_of_line (count, key) |
| 1159 | int count, key; |
| 1160 | { |
| 1161 | rl_point = rl_end; |
| 1162 | return 0; |
| 1163 | } |
| 1164 | |
| 1165 | /* Move forward a word. We do what Emacs does. */ |
| 1166 | int |
| 1167 | rl_forward_word (count, key) |
| 1168 | int count, key; |
| 1169 | { |
| 1170 | int c; |
| 1171 | |
| 1172 | if (count < 0) |
| 1173 | { |
| 1174 | rl_backward_word (-count, key); |
| 1175 | return 0; |
| 1176 | } |
| 1177 | |
| 1178 | while (count) |
| 1179 | { |
| 1180 | if (rl_point == rl_end) |
| 1181 | return 0; |
| 1182 | |
| 1183 | /* If we are not in a word, move forward until we are in one. |
| 1184 | Then, move forward until we hit a non-alphabetic character. */ |
| 1185 | c = the_line[rl_point]; |
| 1186 | if (alphabetic (c) == 0) |
| 1187 | { |
| 1188 | while (++rl_point < rl_end) |
| 1189 | { |
| 1190 | c = the_line[rl_point]; |
| 1191 | if (alphabetic (c)) |
| 1192 | break; |
| 1193 | } |
| 1194 | } |
| 1195 | if (rl_point == rl_end) |
| 1196 | return 0; |
| 1197 | while (++rl_point < rl_end) |
| 1198 | { |
| 1199 | c = the_line[rl_point]; |
| 1200 | if (alphabetic (c) == 0) |
| 1201 | break; |
| 1202 | } |
| 1203 | --count; |
| 1204 | } |
| 1205 | return 0; |
| 1206 | } |
| 1207 | |
| 1208 | /* Move backward a word. We do what Emacs does. */ |
| 1209 | int |
| 1210 | rl_backward_word (count, key) |
| 1211 | int count, key; |
| 1212 | { |
| 1213 | int c; |
| 1214 | |
| 1215 | if (count < 0) |
| 1216 | { |
| 1217 | rl_forward_word (-count, key); |
| 1218 | return 0; |
| 1219 | } |
| 1220 | |
| 1221 | while (count) |
| 1222 | { |
| 1223 | if (!rl_point) |
| 1224 | return 0; |
| 1225 | |
| 1226 | /* Like rl_forward_word (), except that we look at the characters |
| 1227 | just before point. */ |
| 1228 | |
| 1229 | c = the_line[rl_point - 1]; |
| 1230 | if (alphabetic (c) == 0) |
| 1231 | { |
| 1232 | while (--rl_point) |
| 1233 | { |
| 1234 | c = the_line[rl_point - 1]; |
| 1235 | if (alphabetic (c)) |
| 1236 | break; |
| 1237 | } |
| 1238 | } |
| 1239 | |
| 1240 | while (rl_point) |
| 1241 | { |
| 1242 | c = the_line[rl_point - 1]; |
| 1243 | if (alphabetic (c) == 0) |
| 1244 | break; |
| 1245 | else |
| 1246 | --rl_point; |
| 1247 | } |
| 1248 | --count; |
| 1249 | } |
| 1250 | return 0; |
| 1251 | } |
| 1252 | |
| 1253 | /* Clear the current line. Numeric argument to C-l does this. */ |
| 1254 | int |
| 1255 | rl_refresh_line (ignore1, ignore2) |
| 1256 | int ignore1, ignore2; |
| 1257 | { |
| 1258 | int curr_line, nleft; |
| 1259 | |
| 1260 | /* Find out whether or not there might be invisible characters in the |
| 1261 | editing buffer. */ |
| 1262 | if (rl_display_prompt == rl_prompt) |
| 1263 | nleft = _rl_last_c_pos - screenwidth - rl_visible_prompt_length; |
| 1264 | else |
| 1265 | nleft = _rl_last_c_pos - screenwidth; |
| 1266 | |
| 1267 | if (nleft > 0) |
| 1268 | curr_line = 1 + nleft / screenwidth; |
| 1269 | else |
| 1270 | curr_line = 0; |
| 1271 | |
| 1272 | _rl_move_vert (curr_line); |
| 1273 | _rl_move_cursor_relative (0, the_line); /* XXX is this right */ |
| 1274 | |
| 1275 | #if defined (__GO32__) |
| 1276 | { |
| 1277 | int row, col, width, row_start; |
| 1278 | |
| 1279 | ScreenGetCursor (&row, &col); |
| 1280 | width = ScreenCols (); |
| 1281 | row_start = ScreenPrimary + (row * width); |
| 1282 | memset (row_start + col, 0, (width - col) * 2); |
| 1283 | } |
| 1284 | #else /* !__GO32__ */ |
| 1285 | _rl_clear_to_eol (0); /* arg of 0 means to not use spaces */ |
| 1286 | #endif /* !__GO32__ */ |
| 1287 | |
| 1288 | rl_forced_update_display (); |
| 1289 | rl_display_fixed = 1; |
| 1290 | |
| 1291 | return 0; |
| 1292 | } |
| 1293 | |
| 1294 | /* C-l typed to a line without quoting clears the screen, and then reprints |
| 1295 | the prompt and the current input line. Given a numeric arg, redraw only |
| 1296 | the current line. */ |
| 1297 | int |
| 1298 | rl_clear_screen (count, key) |
| 1299 | int count, key; |
| 1300 | { |
| 1301 | if (rl_explicit_arg) |
| 1302 | { |
| 1303 | rl_refresh_line (count, key); |
| 1304 | return 0; |
| 1305 | } |
| 1306 | |
| 1307 | _rl_clear_screen (); /* calls termcap function to clear screen */ |
| 1308 | rl_forced_update_display (); |
| 1309 | rl_display_fixed = 1; |
| 1310 | |
| 1311 | return 0; |
| 1312 | } |
| 1313 | |
| 1314 | int |
| 1315 | rl_arrow_keys (count, c) |
| 1316 | int count, c; |
| 1317 | { |
| 1318 | int ch; |
| 1319 | |
| 1320 | ch = rl_read_key (); |
| 1321 | |
| 1322 | switch (_rl_to_upper (ch)) |
| 1323 | { |
| 1324 | case 'A': |
| 1325 | rl_get_previous_history (count, ch); |
| 1326 | break; |
| 1327 | |
| 1328 | case 'B': |
| 1329 | rl_get_next_history (count, ch); |
| 1330 | break; |
| 1331 | |
| 1332 | case 'C': |
| 1333 | rl_forward (count, ch); |
| 1334 | break; |
| 1335 | |
| 1336 | case 'D': |
| 1337 | rl_backward (count, ch); |
| 1338 | break; |
| 1339 | |
| 1340 | default: |
| 1341 | ding (); |
| 1342 | } |
| 1343 | return 0; |
| 1344 | } |
| 1345 | |
| 1346 | \f |
| 1347 | /* **************************************************************** */ |
| 1348 | /* */ |
| 1349 | /* Text commands */ |
| 1350 | /* */ |
| 1351 | /* **************************************************************** */ |
| 1352 | |
| 1353 | /* Insert the character C at the current location, moving point forward. */ |
| 1354 | int |
| 1355 | rl_insert (count, c) |
| 1356 | int count, c; |
| 1357 | { |
| 1358 | register int i; |
| 1359 | char *string; |
| 1360 | |
| 1361 | if (count <= 0) |
| 1362 | return 0; |
| 1363 | |
| 1364 | /* If we can optimize, then do it. But don't let people crash |
| 1365 | readline because of extra large arguments. */ |
| 1366 | if (count > 1 && count <= 1024) |
| 1367 | { |
| 1368 | string = xmalloc (1 + count); |
| 1369 | |
| 1370 | for (i = 0; i < count; i++) |
| 1371 | string[i] = c; |
| 1372 | |
| 1373 | string[i] = '\0'; |
| 1374 | rl_insert_text (string); |
| 1375 | free (string); |
| 1376 | |
| 1377 | return 0; |
| 1378 | } |
| 1379 | |
| 1380 | if (count > 1024) |
| 1381 | { |
| 1382 | int decreaser; |
| 1383 | char str[1024+1]; |
| 1384 | |
| 1385 | for (i = 0; i < 1024; i++) |
| 1386 | str[i] = c; |
| 1387 | |
| 1388 | while (count) |
| 1389 | { |
| 1390 | decreaser = (count > 1024 ? 1024 : count); |
| 1391 | str[decreaser] = '\0'; |
| 1392 | rl_insert_text (str); |
| 1393 | count -= decreaser; |
| 1394 | } |
| 1395 | |
| 1396 | return 0; |
| 1397 | } |
| 1398 | |
| 1399 | /* We are inserting a single character. |
| 1400 | If there is pending input, then make a string of all of the |
| 1401 | pending characters that are bound to rl_insert, and insert |
| 1402 | them all. */ |
| 1403 | if (_rl_any_typein ()) |
| 1404 | _rl_insert_typein (c); |
| 1405 | else |
| 1406 | { |
| 1407 | /* Inserting a single character. */ |
| 1408 | char str[2]; |
| 1409 | |
| 1410 | str[1] = '\0'; |
| 1411 | str[0] = c; |
| 1412 | rl_insert_text (str); |
| 1413 | } |
| 1414 | return 0; |
| 1415 | } |
| 1416 | |
| 1417 | /* Insert the next typed character verbatim. */ |
| 1418 | int |
| 1419 | rl_quoted_insert (count, key) |
| 1420 | int count, key; |
| 1421 | { |
| 1422 | int c; |
| 1423 | |
| 1424 | c = rl_read_key (); |
| 1425 | return (rl_insert (count, c)); |
| 1426 | } |
| 1427 | |
| 1428 | /* Insert a tab character. */ |
| 1429 | int |
| 1430 | rl_tab_insert (count, key) |
| 1431 | int count, key; |
| 1432 | { |
| 1433 | return (rl_insert (count, '\t')); |
| 1434 | } |
| 1435 | |
| 1436 | /* What to do when a NEWLINE is pressed. We accept the whole line. |
| 1437 | KEY is the key that invoked this command. I guess it could have |
| 1438 | meaning in the future. */ |
| 1439 | int |
| 1440 | rl_newline (count, key) |
| 1441 | int count, key; |
| 1442 | { |
| 1443 | rl_done = 1; |
| 1444 | |
| 1445 | #if defined (VI_MODE) |
| 1446 | if (rl_editing_mode == vi_mode) |
| 1447 | { |
| 1448 | _rl_vi_done_inserting (); |
| 1449 | _rl_vi_reset_last (); |
| 1450 | } |
| 1451 | #endif /* VI_MODE */ |
| 1452 | |
| 1453 | /* If we've been asked to erase empty lines, suppress the final update, |
| 1454 | since _rl_update_final calls crlf(). */ |
| 1455 | if (rl_erase_empty_line && rl_point == 0 && rl_end == 0) |
| 1456 | return 0; |
| 1457 | |
| 1458 | if (readline_echoing_p) |
| 1459 | _rl_update_final (); |
| 1460 | return 0; |
| 1461 | } |
| 1462 | |
| 1463 | /* What to do for some uppercase characters, like meta characters, |
| 1464 | and some characters appearing in emacs_ctlx_keymap. This function |
| 1465 | is just a stub, you bind keys to it and the code in _rl_dispatch () |
| 1466 | is special cased. */ |
| 1467 | int |
| 1468 | rl_do_lowercase_version (ignore1, ignore2) |
| 1469 | int ignore1, ignore2; |
| 1470 | { |
| 1471 | return 0; |
| 1472 | } |
| 1473 | |
| 1474 | /* Rubout the character behind point. */ |
| 1475 | int |
| 1476 | rl_rubout (count, key) |
| 1477 | int count, key; |
| 1478 | { |
| 1479 | if (count < 0) |
| 1480 | { |
| 1481 | rl_delete (-count, key); |
| 1482 | return 0; |
| 1483 | } |
| 1484 | |
| 1485 | if (!rl_point) |
| 1486 | { |
| 1487 | ding (); |
| 1488 | return -1; |
| 1489 | } |
| 1490 | |
| 1491 | if (count > 1 || rl_explicit_arg) |
| 1492 | { |
| 1493 | int orig_point = rl_point; |
| 1494 | rl_backward (count, key); |
| 1495 | rl_kill_text (orig_point, rl_point); |
| 1496 | } |
| 1497 | else |
| 1498 | { |
| 1499 | int c = the_line[--rl_point]; |
| 1500 | rl_delete_text (rl_point, rl_point + 1); |
| 1501 | |
| 1502 | if (rl_point == rl_end && isprint (c) && _rl_last_c_pos) |
| 1503 | { |
| 1504 | int l; |
| 1505 | l = rl_character_len (c, rl_point); |
| 1506 | _rl_erase_at_end_of_line (l); |
| 1507 | } |
| 1508 | } |
| 1509 | return 0; |
| 1510 | } |
| 1511 | |
| 1512 | /* Delete the character under the cursor. Given a numeric argument, |
| 1513 | kill that many characters instead. */ |
| 1514 | int |
| 1515 | rl_delete (count, key) |
| 1516 | int count, key; |
| 1517 | { |
| 1518 | if (count < 0) |
| 1519 | return (rl_rubout (-count, key)); |
| 1520 | |
| 1521 | if (rl_point == rl_end) |
| 1522 | { |
| 1523 | ding (); |
| 1524 | return -1; |
| 1525 | } |
| 1526 | |
| 1527 | if (count > 1 || rl_explicit_arg) |
| 1528 | { |
| 1529 | int orig_point = rl_point; |
| 1530 | rl_forward (count, key); |
| 1531 | rl_kill_text (orig_point, rl_point); |
| 1532 | rl_point = orig_point; |
| 1533 | return 0; |
| 1534 | } |
| 1535 | else |
| 1536 | return (rl_delete_text (rl_point, rl_point + 1)); |
| 1537 | } |
| 1538 | |
| 1539 | /* Delete the character under the cursor, unless the insertion |
| 1540 | point is at the end of the line, in which case the character |
| 1541 | behind the cursor is deleted. COUNT is obeyed and may be used |
| 1542 | to delete forward or backward that many characters. */ |
| 1543 | int |
| 1544 | rl_rubout_or_delete (count, key) |
| 1545 | int count, key; |
| 1546 | { |
| 1547 | if (rl_end != 0 && rl_point == rl_end) |
| 1548 | return (rl_rubout (count, key)); |
| 1549 | else |
| 1550 | return (rl_delete (count, key)); |
| 1551 | } |
| 1552 | |
| 1553 | /* Delete all spaces and tabs around point. */ |
| 1554 | int |
| 1555 | rl_delete_horizontal_space (count, ignore) |
| 1556 | int count, ignore; |
| 1557 | { |
| 1558 | int start = rl_point; |
| 1559 | |
| 1560 | while (rl_point && whitespace (the_line[rl_point - 1])) |
| 1561 | rl_point--; |
| 1562 | |
| 1563 | start = rl_point; |
| 1564 | |
| 1565 | while (rl_point < rl_end && whitespace (the_line[rl_point])) |
| 1566 | rl_point++; |
| 1567 | |
| 1568 | if (start != rl_point) |
| 1569 | { |
| 1570 | rl_delete_text (start, rl_point); |
| 1571 | rl_point = start; |
| 1572 | } |
| 1573 | return 0; |
| 1574 | } |
| 1575 | |
| 1576 | /* Like the tcsh editing function delete-char-or-list. The eof character |
| 1577 | is caught before this is invoked, so this really does the same thing as |
| 1578 | delete-char-or-list-or-eof, as long as it's bound to the eof character. */ |
| 1579 | int |
| 1580 | rl_delete_or_show_completions (count, key) |
| 1581 | int count, key; |
| 1582 | { |
| 1583 | if (rl_end != 0 && rl_point == rl_end) |
| 1584 | return (rl_possible_completions (count, key)); |
| 1585 | else |
| 1586 | return (rl_delete (count, key)); |
| 1587 | } |
| 1588 | |
| 1589 | #ifndef RL_COMMENT_BEGIN_DEFAULT |
| 1590 | #define RL_COMMENT_BEGIN_DEFAULT "#" |
| 1591 | #endif |
| 1592 | |
| 1593 | /* Turn the current line into a comment in shell history. |
| 1594 | A K*rn shell style function. */ |
| 1595 | int |
| 1596 | rl_insert_comment (count, key) |
| 1597 | int count, key; |
| 1598 | { |
| 1599 | rl_beg_of_line (1, key); |
| 1600 | rl_insert_text (_rl_comment_begin ? _rl_comment_begin |
| 1601 | : RL_COMMENT_BEGIN_DEFAULT); |
| 1602 | (*rl_redisplay_function) (); |
| 1603 | rl_newline (1, '\n'); |
| 1604 | return (0); |
| 1605 | } |
| 1606 | |
| 1607 | /* **************************************************************** */ |
| 1608 | /* */ |
| 1609 | /* Changing Case */ |
| 1610 | /* */ |
| 1611 | /* **************************************************************** */ |
| 1612 | |
| 1613 | /* The three kinds of things that we know how to do. */ |
| 1614 | #define UpCase 1 |
| 1615 | #define DownCase 2 |
| 1616 | #define CapCase 3 |
| 1617 | |
| 1618 | static int rl_change_case (); |
| 1619 | |
| 1620 | /* Uppercase the word at point. */ |
| 1621 | int |
| 1622 | rl_upcase_word (count, key) |
| 1623 | int count, key; |
| 1624 | { |
| 1625 | return (rl_change_case (count, UpCase)); |
| 1626 | } |
| 1627 | |
| 1628 | /* Lowercase the word at point. */ |
| 1629 | int |
| 1630 | rl_downcase_word (count, key) |
| 1631 | int count, key; |
| 1632 | { |
| 1633 | return (rl_change_case (count, DownCase)); |
| 1634 | } |
| 1635 | |
| 1636 | /* Upcase the first letter, downcase the rest. */ |
| 1637 | int |
| 1638 | rl_capitalize_word (count, key) |
| 1639 | int count, key; |
| 1640 | { |
| 1641 | return (rl_change_case (count, CapCase)); |
| 1642 | } |
| 1643 | |
| 1644 | /* The meaty function. |
| 1645 | Change the case of COUNT words, performing OP on them. |
| 1646 | OP is one of UpCase, DownCase, or CapCase. |
| 1647 | If a negative argument is given, leave point where it started, |
| 1648 | otherwise, leave it where it moves to. */ |
| 1649 | static int |
| 1650 | rl_change_case (count, op) |
| 1651 | int count, op; |
| 1652 | { |
| 1653 | register int start, end; |
| 1654 | int inword, c; |
| 1655 | |
| 1656 | start = rl_point; |
| 1657 | rl_forward_word (count, 0); |
| 1658 | end = rl_point; |
| 1659 | |
| 1660 | if (count < 0) |
| 1661 | SWAP (start, end); |
| 1662 | |
| 1663 | /* We are going to modify some text, so let's prepare to undo it. */ |
| 1664 | rl_modifying (start, end); |
| 1665 | |
| 1666 | for (inword = 0; start < end; start++) |
| 1667 | { |
| 1668 | c = the_line[start]; |
| 1669 | switch (op) |
| 1670 | { |
| 1671 | case UpCase: |
| 1672 | the_line[start] = _rl_to_upper (c); |
| 1673 | break; |
| 1674 | |
| 1675 | case DownCase: |
| 1676 | the_line[start] = _rl_to_lower (c); |
| 1677 | break; |
| 1678 | |
| 1679 | case CapCase: |
| 1680 | the_line[start] = (inword == 0) ? _rl_to_upper (c) : _rl_to_lower (c); |
| 1681 | inword = alphabetic (the_line[start]); |
| 1682 | break; |
| 1683 | |
| 1684 | default: |
| 1685 | ding (); |
| 1686 | return -1; |
| 1687 | } |
| 1688 | } |
| 1689 | rl_point = end; |
| 1690 | return 0; |
| 1691 | } |
| 1692 | |
| 1693 | /* **************************************************************** */ |
| 1694 | /* */ |
| 1695 | /* Transposition */ |
| 1696 | /* */ |
| 1697 | /* **************************************************************** */ |
| 1698 | |
| 1699 | /* Transpose the words at point. */ |
| 1700 | int |
| 1701 | rl_transpose_words (count, key) |
| 1702 | int count, key; |
| 1703 | { |
| 1704 | char *word1, *word2; |
| 1705 | int w1_beg, w1_end, w2_beg, w2_end; |
| 1706 | int orig_point = rl_point; |
| 1707 | |
| 1708 | if (!count) |
| 1709 | return 0; |
| 1710 | |
| 1711 | /* Find the two words. */ |
| 1712 | rl_forward_word (count, key); |
| 1713 | w2_end = rl_point; |
| 1714 | rl_backward_word (1, key); |
| 1715 | w2_beg = rl_point; |
| 1716 | rl_backward_word (count, key); |
| 1717 | w1_beg = rl_point; |
| 1718 | rl_forward_word (1, key); |
| 1719 | w1_end = rl_point; |
| 1720 | |
| 1721 | /* Do some check to make sure that there really are two words. */ |
| 1722 | if ((w1_beg == w2_beg) || (w2_beg < w1_end)) |
| 1723 | { |
| 1724 | ding (); |
| 1725 | rl_point = orig_point; |
| 1726 | return -1; |
| 1727 | } |
| 1728 | |
| 1729 | /* Get the text of the words. */ |
| 1730 | word1 = rl_copy_text (w1_beg, w1_end); |
| 1731 | word2 = rl_copy_text (w2_beg, w2_end); |
| 1732 | |
| 1733 | /* We are about to do many insertions and deletions. Remember them |
| 1734 | as one operation. */ |
| 1735 | rl_begin_undo_group (); |
| 1736 | |
| 1737 | /* Do the stuff at word2 first, so that we don't have to worry |
| 1738 | about word1 moving. */ |
| 1739 | rl_point = w2_beg; |
| 1740 | rl_delete_text (w2_beg, w2_end); |
| 1741 | rl_insert_text (word1); |
| 1742 | |
| 1743 | rl_point = w1_beg; |
| 1744 | rl_delete_text (w1_beg, w1_end); |
| 1745 | rl_insert_text (word2); |
| 1746 | |
| 1747 | /* This is exactly correct since the text before this point has not |
| 1748 | changed in length. */ |
| 1749 | rl_point = w2_end; |
| 1750 | |
| 1751 | /* I think that does it. */ |
| 1752 | rl_end_undo_group (); |
| 1753 | free (word1); |
| 1754 | free (word2); |
| 1755 | |
| 1756 | return 0; |
| 1757 | } |
| 1758 | |
| 1759 | /* Transpose the characters at point. If point is at the end of the line, |
| 1760 | then transpose the characters before point. */ |
| 1761 | int |
| 1762 | rl_transpose_chars (count, key) |
| 1763 | int count, key; |
| 1764 | { |
| 1765 | char dummy[2]; |
| 1766 | |
| 1767 | if (!count) |
| 1768 | return 0; |
| 1769 | |
| 1770 | if (!rl_point || rl_end < 2) |
| 1771 | { |
| 1772 | ding (); |
| 1773 | return -1; |
| 1774 | } |
| 1775 | |
| 1776 | rl_begin_undo_group (); |
| 1777 | |
| 1778 | if (rl_point == rl_end) |
| 1779 | { |
| 1780 | --rl_point; |
| 1781 | count = 1; |
| 1782 | } |
| 1783 | rl_point--; |
| 1784 | |
| 1785 | dummy[0] = the_line[rl_point]; |
| 1786 | dummy[1] = '\0'; |
| 1787 | |
| 1788 | rl_delete_text (rl_point, rl_point + 1); |
| 1789 | |
| 1790 | rl_point += count; |
| 1791 | _rl_fix_point (0); |
| 1792 | rl_insert_text (dummy); |
| 1793 | |
| 1794 | rl_end_undo_group (); |
| 1795 | return 0; |
| 1796 | } |
| 1797 | |
| 1798 | /* **************************************************************** */ |
| 1799 | /* */ |
| 1800 | /* Character Searching */ |
| 1801 | /* */ |
| 1802 | /* **************************************************************** */ |
| 1803 | |
| 1804 | int |
| 1805 | _rl_char_search_internal (count, dir, schar) |
| 1806 | int count, dir, schar; |
| 1807 | { |
| 1808 | int pos, inc; |
| 1809 | |
| 1810 | pos = rl_point; |
| 1811 | inc = (dir < 0) ? -1 : 1; |
| 1812 | while (count) |
| 1813 | { |
| 1814 | if ((dir < 0 && pos <= 0) || (dir > 0 && pos >= rl_end)) |
| 1815 | { |
| 1816 | ding (); |
| 1817 | return -1; |
| 1818 | } |
| 1819 | |
| 1820 | pos += inc; |
| 1821 | do |
| 1822 | { |
| 1823 | if (rl_line_buffer[pos] == schar) |
| 1824 | { |
| 1825 | count--; |
| 1826 | if (dir < 0) |
| 1827 | rl_point = (dir == BTO) ? pos + 1 : pos; |
| 1828 | else |
| 1829 | rl_point = (dir == FTO) ? pos - 1 : pos; |
| 1830 | break; |
| 1831 | } |
| 1832 | } |
| 1833 | while ((dir < 0) ? pos-- : ++pos < rl_end); |
| 1834 | } |
| 1835 | return (0); |
| 1836 | } |
| 1837 | |
| 1838 | /* Search COUNT times for a character read from the current input stream. |
| 1839 | FDIR is the direction to search if COUNT is non-negative; otherwise |
| 1840 | the search goes in BDIR. */ |
| 1841 | static int |
| 1842 | _rl_char_search (count, fdir, bdir) |
| 1843 | int count, fdir, bdir; |
| 1844 | { |
| 1845 | int c; |
| 1846 | |
| 1847 | c = rl_read_key (); |
| 1848 | if (count < 0) |
| 1849 | return (_rl_char_search_internal (-count, bdir, c)); |
| 1850 | else |
| 1851 | return (_rl_char_search_internal (count, fdir, c)); |
| 1852 | } |
| 1853 | |
| 1854 | int |
| 1855 | rl_char_search (count, key) |
| 1856 | int count, key; |
| 1857 | { |
| 1858 | return (_rl_char_search (count, FFIND, BFIND)); |
| 1859 | } |
| 1860 | |
| 1861 | int |
| 1862 | rl_backward_char_search (count, key) |
| 1863 | int count, key; |
| 1864 | { |
| 1865 | return (_rl_char_search (count, BFIND, FFIND)); |
| 1866 | } |
| 1867 | |
| 1868 | /* **************************************************************** */ |
| 1869 | /* */ |
| 1870 | /* History Utilities */ |
| 1871 | /* */ |
| 1872 | /* **************************************************************** */ |
| 1873 | |
| 1874 | /* We already have a history library, and that is what we use to control |
| 1875 | the history features of readline. This is our local interface to |
| 1876 | the history mechanism. */ |
| 1877 | |
| 1878 | /* While we are editing the history, this is the saved |
| 1879 | version of the original line. */ |
| 1880 | HIST_ENTRY *saved_line_for_history = (HIST_ENTRY *)NULL; |
| 1881 | |
| 1882 | /* Set the history pointer back to the last entry in the history. */ |
| 1883 | static void |
| 1884 | start_using_history () |
| 1885 | { |
| 1886 | using_history (); |
| 1887 | if (saved_line_for_history) |
| 1888 | _rl_free_history_entry (saved_line_for_history); |
| 1889 | |
| 1890 | saved_line_for_history = (HIST_ENTRY *)NULL; |
| 1891 | } |
| 1892 | |
| 1893 | /* Free the contents (and containing structure) of a HIST_ENTRY. */ |
| 1894 | void |
| 1895 | _rl_free_history_entry (entry) |
| 1896 | HIST_ENTRY *entry; |
| 1897 | { |
| 1898 | if (entry == 0) |
| 1899 | return; |
| 1900 | if (entry->line) |
| 1901 | free (entry->line); |
| 1902 | free (entry); |
| 1903 | } |
| 1904 | |
| 1905 | /* Perhaps put back the current line if it has changed. */ |
| 1906 | int |
| 1907 | maybe_replace_line () |
| 1908 | { |
| 1909 | HIST_ENTRY *temp; |
| 1910 | |
| 1911 | temp = current_history (); |
| 1912 | /* If the current line has changed, save the changes. */ |
| 1913 | if (temp && ((UNDO_LIST *)(temp->data) != rl_undo_list)) |
| 1914 | { |
| 1915 | temp = replace_history_entry (where_history (), the_line, (histdata_t)rl_undo_list); |
| 1916 | free (temp->line); |
| 1917 | free (temp); |
| 1918 | } |
| 1919 | return 0; |
| 1920 | } |
| 1921 | |
| 1922 | /* Put back the saved_line_for_history if there is one. */ |
| 1923 | int |
| 1924 | maybe_unsave_line () |
| 1925 | { |
| 1926 | int line_len; |
| 1927 | |
| 1928 | if (saved_line_for_history) |
| 1929 | { |
| 1930 | line_len = strlen (saved_line_for_history->line); |
| 1931 | |
| 1932 | if (line_len >= rl_line_buffer_len) |
| 1933 | rl_extend_line_buffer (line_len); |
| 1934 | |
| 1935 | strcpy (the_line, saved_line_for_history->line); |
| 1936 | rl_undo_list = (UNDO_LIST *)saved_line_for_history->data; |
| 1937 | _rl_free_history_entry (saved_line_for_history); |
| 1938 | saved_line_for_history = (HIST_ENTRY *)NULL; |
| 1939 | rl_end = rl_point = strlen (the_line); |
| 1940 | } |
| 1941 | else |
| 1942 | ding (); |
| 1943 | return 0; |
| 1944 | } |
| 1945 | |
| 1946 | /* Save the current line in saved_line_for_history. */ |
| 1947 | int |
| 1948 | maybe_save_line () |
| 1949 | { |
| 1950 | if (saved_line_for_history == 0) |
| 1951 | { |
| 1952 | saved_line_for_history = (HIST_ENTRY *)xmalloc (sizeof (HIST_ENTRY)); |
| 1953 | saved_line_for_history->line = savestring (the_line); |
| 1954 | saved_line_for_history->data = (char *)rl_undo_list; |
| 1955 | } |
| 1956 | return 0; |
| 1957 | } |
| 1958 | |
| 1959 | /* **************************************************************** */ |
| 1960 | /* */ |
| 1961 | /* History Commands */ |
| 1962 | /* */ |
| 1963 | /* **************************************************************** */ |
| 1964 | |
| 1965 | /* Meta-< goes to the start of the history. */ |
| 1966 | int |
| 1967 | rl_beginning_of_history (count, key) |
| 1968 | int count, key; |
| 1969 | { |
| 1970 | return (rl_get_previous_history (1 + where_history (), key)); |
| 1971 | } |
| 1972 | |
| 1973 | /* Meta-> goes to the end of the history. (The current line). */ |
| 1974 | int |
| 1975 | rl_end_of_history (count, key) |
| 1976 | int count, key; |
| 1977 | { |
| 1978 | maybe_replace_line (); |
| 1979 | using_history (); |
| 1980 | maybe_unsave_line (); |
| 1981 | return 0; |
| 1982 | } |
| 1983 | |
| 1984 | /* Move down to the next history line. */ |
| 1985 | int |
| 1986 | rl_get_next_history (count, key) |
| 1987 | int count, key; |
| 1988 | { |
| 1989 | HIST_ENTRY *temp; |
| 1990 | int line_len; |
| 1991 | |
| 1992 | if (count < 0) |
| 1993 | return (rl_get_previous_history (-count, key)); |
| 1994 | |
| 1995 | if (count == 0) |
| 1996 | return 0; |
| 1997 | |
| 1998 | maybe_replace_line (); |
| 1999 | |
| 2000 | temp = (HIST_ENTRY *)NULL; |
| 2001 | while (count) |
| 2002 | { |
| 2003 | temp = next_history (); |
| 2004 | if (!temp) |
| 2005 | break; |
| 2006 | --count; |
| 2007 | } |
| 2008 | |
| 2009 | if (temp == 0) |
| 2010 | maybe_unsave_line (); |
| 2011 | else |
| 2012 | { |
| 2013 | line_len = strlen (temp->line); |
| 2014 | |
| 2015 | if (line_len >= rl_line_buffer_len) |
| 2016 | rl_extend_line_buffer (line_len); |
| 2017 | |
| 2018 | strcpy (the_line, temp->line); |
| 2019 | rl_undo_list = (UNDO_LIST *)temp->data; |
| 2020 | rl_end = rl_point = strlen (the_line); |
| 2021 | #if defined (VI_MODE) |
| 2022 | if (rl_editing_mode == vi_mode) |
| 2023 | rl_point = 0; |
| 2024 | #endif /* VI_MODE */ |
| 2025 | } |
| 2026 | return 0; |
| 2027 | } |
| 2028 | |
| 2029 | /* Get the previous item out of our interactive history, making it the current |
| 2030 | line. If there is no previous history, just ding. */ |
| 2031 | int |
| 2032 | rl_get_previous_history (count, key) |
| 2033 | int count, key; |
| 2034 | { |
| 2035 | HIST_ENTRY *old_temp, *temp; |
| 2036 | int line_len; |
| 2037 | |
| 2038 | if (count < 0) |
| 2039 | return (rl_get_next_history (-count, key)); |
| 2040 | |
| 2041 | if (count == 0) |
| 2042 | return 0; |
| 2043 | |
| 2044 | /* If we don't have a line saved, then save this one. */ |
| 2045 | maybe_save_line (); |
| 2046 | |
| 2047 | /* If the current line has changed, save the changes. */ |
| 2048 | maybe_replace_line (); |
| 2049 | |
| 2050 | temp = old_temp = (HIST_ENTRY *)NULL; |
| 2051 | while (count) |
| 2052 | { |
| 2053 | temp = previous_history (); |
| 2054 | if (temp == 0) |
| 2055 | break; |
| 2056 | |
| 2057 | old_temp = temp; |
| 2058 | --count; |
| 2059 | } |
| 2060 | |
| 2061 | /* If there was a large argument, and we moved back to the start of the |
| 2062 | history, that is not an error. So use the last value found. */ |
| 2063 | if (!temp && old_temp) |
| 2064 | temp = old_temp; |
| 2065 | |
| 2066 | if (temp == 0) |
| 2067 | ding (); |
| 2068 | else |
| 2069 | { |
| 2070 | line_len = strlen (temp->line); |
| 2071 | |
| 2072 | if (line_len >= rl_line_buffer_len) |
| 2073 | rl_extend_line_buffer (line_len); |
| 2074 | |
| 2075 | strcpy (the_line, temp->line); |
| 2076 | rl_undo_list = (UNDO_LIST *)temp->data; |
| 2077 | rl_end = rl_point = line_len; |
| 2078 | |
| 2079 | #if defined (VI_MODE) |
| 2080 | if (rl_editing_mode == vi_mode) |
| 2081 | rl_point = 0; |
| 2082 | #endif /* VI_MODE */ |
| 2083 | } |
| 2084 | return 0; |
| 2085 | } |
| 2086 | |
| 2087 | /* **************************************************************** */ |
| 2088 | /* */ |
| 2089 | /* The Mark and the Region. */ |
| 2090 | /* */ |
| 2091 | /* **************************************************************** */ |
| 2092 | |
| 2093 | /* Set the mark at POSITION. */ |
| 2094 | int |
| 2095 | _rl_set_mark_at_pos (position) |
| 2096 | int position; |
| 2097 | { |
| 2098 | if (position > rl_end) |
| 2099 | return -1; |
| 2100 | |
| 2101 | rl_mark = position; |
| 2102 | return 0; |
| 2103 | } |
| 2104 | |
| 2105 | /* A bindable command to set the mark. */ |
| 2106 | int |
| 2107 | rl_set_mark (count, key) |
| 2108 | int count, key; |
| 2109 | { |
| 2110 | return (_rl_set_mark_at_pos (rl_explicit_arg ? count : rl_point)); |
| 2111 | } |
| 2112 | |
| 2113 | /* Exchange the position of mark and point. */ |
| 2114 | int |
| 2115 | rl_exchange_point_and_mark (count, key) |
| 2116 | int count, key; |
| 2117 | { |
| 2118 | if (rl_mark > rl_end) |
| 2119 | rl_mark = -1; |
| 2120 | |
| 2121 | if (rl_mark == -1) |
| 2122 | { |
| 2123 | ding (); |
| 2124 | return -1; |
| 2125 | } |
| 2126 | else |
| 2127 | SWAP (rl_point, rl_mark); |
| 2128 | |
| 2129 | return 0; |
| 2130 | } |
| 2131 | |
| 2132 | /* **************************************************************** */ |
| 2133 | /* */ |
| 2134 | /* Editing Modes */ |
| 2135 | /* */ |
| 2136 | /* **************************************************************** */ |
| 2137 | /* How to toggle back and forth between editing modes. */ |
| 2138 | int |
| 2139 | rl_vi_editing_mode (count, key) |
| 2140 | int count, key; |
| 2141 | { |
| 2142 | #if defined (VI_MODE) |
| 2143 | rl_editing_mode = vi_mode; |
| 2144 | rl_vi_insertion_mode (1, key); |
| 2145 | #endif /* VI_MODE */ |
| 2146 | return 0; |
| 2147 | } |
| 2148 | |
| 2149 | int |
| 2150 | rl_emacs_editing_mode (count, key) |
| 2151 | int count, key; |
| 2152 | { |
| 2153 | rl_editing_mode = emacs_mode; |
| 2154 | _rl_keymap = emacs_standard_keymap; |
| 2155 | return 0; |
| 2156 | } |