1/* text.c -- text handling commands for readline. */ 2 3/* Copyright (C) 1987-2005 Free Software Foundation, Inc. 4 5 This file is part of the GNU Readline Library, a library for 6 reading lines of text with interactive input and history editing. 7 8 The GNU Readline Library is free software; you can redistribute it 9 and/or modify it under the terms of the GNU General Public License 10 as published by the Free Software Foundation; either version 2, or 11 (at your option) any later version. 12 13 The GNU Readline Library is distributed in the hope that it will be 14 useful, but WITHOUT ANY WARRANTY; without even the implied warranty 15 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 The GNU General Public License is often shipped with GNU software, and 19 is generally kept in a file called COPYING or LICENSE. If you do not 20 have a copy of the license, write to the Free Software Foundation, 21 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ 22#define READLINE_LIBRARY 23 24#if defined (HAVE_CONFIG_H) 25# include <config.h> 26#endif 27 28#if defined (HAVE_UNISTD_H) 29# include <unistd.h> 30#endif /* HAVE_UNISTD_H */ 31 32#if defined (HAVE_STDLIB_H) 33# include <stdlib.h> 34#else 35# include "ansi_stdlib.h" 36#endif /* HAVE_STDLIB_H */ 37 38#if defined (HAVE_LOCALE_H) 39# include <locale.h> 40#endif 41 42#include <stdio.h> 43 44/* System-specific feature definitions and include files. */ 45#include "rldefs.h" 46#include "rlmbutil.h" 47 48#if defined (__EMX__) 49# define INCL_DOSPROCESS 50# include <os2.h> 51#endif /* __EMX__ */ 52 53/* Some standard library routines. */ 54#include "readline.h" 55#include "history.h" 56 57#include "rlprivate.h" 58#include "rlshell.h" 59#include "xmalloc.h" 60 61/* Forward declarations. */ 62static int rl_change_case PARAMS((int, int)); 63static int _rl_char_search PARAMS((int, int, int)); 64 65#if defined (READLINE_CALLBACKS) 66static int _rl_insert_next_callback PARAMS((_rl_callback_generic_arg *)); 67static int _rl_char_search_callback PARAMS((_rl_callback_generic_arg *)); 68#endif 69 70/* **************************************************************** */ 71/* */ 72/* Insert and Delete */ 73/* */ 74/* **************************************************************** */ 75 76/* Insert a string of text into the line at point. This is the only 77 way that you should do insertion. _rl_insert_char () calls this 78 function. Returns the number of characters inserted. */ 79int 80rl_insert_text (string) 81 const char *string; 82{ 83 register int i, l; 84 85 l = (string && *string) ? strlen (string) : 0; 86 if (l == 0) 87 return 0; 88 89 if (rl_end + l >= rl_line_buffer_len) 90 rl_extend_line_buffer (rl_end + l); 91 92 for (i = rl_end; i >= rl_point; i--) 93 rl_line_buffer[i + l] = rl_line_buffer[i]; 94 strncpy (rl_line_buffer + rl_point, string, l); 95 96 /* Remember how to undo this if we aren't undoing something. */ 97 if (_rl_doing_an_undo == 0) 98 { 99 /* If possible and desirable, concatenate the undos. */ 100 if ((l == 1) && 101 rl_undo_list && 102 (rl_undo_list->what == UNDO_INSERT) && 103 (rl_undo_list->end == rl_point) && 104 (rl_undo_list->end - rl_undo_list->start < 20)) 105 rl_undo_list->end++; 106 else 107 rl_add_undo (UNDO_INSERT, rl_point, rl_point + l, (char *)NULL); 108 } 109 rl_point += l; 110 rl_end += l; 111 rl_line_buffer[rl_end] = '\0'; 112 return l; 113} 114 115/* Delete the string between FROM and TO. FROM is inclusive, TO is not. 116 Returns the number of characters deleted. */ 117int 118rl_delete_text (from, to) 119 int from, to; 120{ 121 register char *text; 122 register int diff, i; 123 124 /* Fix it if the caller is confused. */ 125 if (from > to) 126 SWAP (from, to); 127 128 /* fix boundaries */ 129 if (to > rl_end) 130 { 131 to = rl_end; 132 if (from > to) 133 from = to; 134 } 135 if (from < 0) 136 from = 0; 137 138 text = rl_copy_text (from, to); 139 140 /* Some versions of strncpy() can't handle overlapping arguments. */ 141 diff = to - from; 142 for (i = from; i < rl_end - diff; i++) 143 rl_line_buffer[i] = rl_line_buffer[i + diff]; 144 145 /* Remember how to undo this delete. */ 146 if (_rl_doing_an_undo == 0) 147 rl_add_undo (UNDO_DELETE, from, to, text); 148 else 149 free (text); 150 151 rl_end -= diff; 152 rl_line_buffer[rl_end] = '\0'; 153 return (diff); 154} 155 156/* Fix up point so that it is within the line boundaries after killing 157 text. If FIX_MARK_TOO is non-zero, the mark is forced within line 158 boundaries also. */ 159 160#define _RL_FIX_POINT(x) \ 161 do { \ 162 if (x > rl_end) \ 163 x = rl_end; \ 164 else if (x < 0) \ 165 x = 0; \ 166 } while (0) 167 168void 169_rl_fix_point (fix_mark_too) 170 int fix_mark_too; 171{ 172 _RL_FIX_POINT (rl_point); 173 if (fix_mark_too) 174 _RL_FIX_POINT (rl_mark); 175} 176#undef _RL_FIX_POINT 177 178/* Replace the contents of the line buffer between START and END with 179 TEXT. The operation is undoable. To replace the entire line in an 180 undoable mode, use _rl_replace_text(text, 0, rl_end); */ 181int 182_rl_replace_text (text, start, end) 183 const char *text; 184 int start, end; 185{ 186 int n; 187 188 rl_begin_undo_group (); 189 rl_delete_text (start, end + 1); 190 rl_point = start; 191 n = rl_insert_text (text); 192 rl_end_undo_group (); 193 194 return n; 195} 196 197/* Replace the current line buffer contents with TEXT. If CLEAR_UNDO is 198 non-zero, we free the current undo list. */ 199void 200rl_replace_line (text, clear_undo) 201 const char *text; 202 int clear_undo; 203{ 204 int len; 205 206 len = strlen (text); 207 if (len >= rl_line_buffer_len) 208 rl_extend_line_buffer (len); 209 strcpy (rl_line_buffer, text); 210 rl_end = len; 211 212 if (clear_undo) 213 rl_free_undo_list (); 214 215 _rl_fix_point (1); 216} 217 218/* **************************************************************** */ 219/* */ 220/* Readline character functions */ 221/* */ 222/* **************************************************************** */ 223 224/* This is not a gap editor, just a stupid line input routine. No hair 225 is involved in writing any of the functions, and none should be. */ 226 227/* Note that: 228 229 rl_end is the place in the string that we would place '\0'; 230 i.e., it is always safe to place '\0' there. 231 232 rl_point is the place in the string where the cursor is. Sometimes 233 this is the same as rl_end. 234 235 Any command that is called interactively receives two arguments. 236 The first is a count: the numeric arg pased to this command. 237 The second is the key which invoked this command. 238*/ 239 240/* **************************************************************** */ 241/* */ 242/* Movement Commands */ 243/* */ 244/* **************************************************************** */ 245 246/* Note that if you `optimize' the display for these functions, you cannot 247 use said functions in other functions which do not do optimizing display. 248 I.e., you will have to update the data base for rl_redisplay, and you 249 might as well let rl_redisplay do that job. */ 250 251/* Move forward COUNT bytes. */ 252int 253rl_forward_byte (count, key) 254 int count, key; 255{ 256 if (count < 0) 257 return (rl_backward_byte (-count, key)); 258 259 if (count > 0) 260 { 261 int end = rl_point + count; 262#if defined (VI_MODE) 263 int lend = rl_end > 0 ? rl_end - (rl_editing_mode == vi_mode) : rl_end; 264#else 265 int lend = rl_end; 266#endif 267 268 if (end > lend) 269 { 270 rl_point = lend; 271 rl_ding (); 272 } 273 else 274 rl_point = end; 275 } 276 277 if (rl_end < 0) 278 rl_end = 0; 279 280 return 0; 281} 282 283#if defined (HANDLE_MULTIBYTE) 284/* Move forward COUNT characters. */ 285int 286rl_forward_char (count, key) 287 int count, key; 288{ 289 int point; 290 291 if (MB_CUR_MAX == 1 || rl_byte_oriented) 292 return (rl_forward_byte (count, key)); 293 294 if (count < 0) 295 return (rl_backward_char (-count, key)); 296 297 if (count > 0) 298 { 299 point = _rl_find_next_mbchar (rl_line_buffer, rl_point, count, MB_FIND_NONZERO); 300 301#if defined (VI_MODE) 302 if (rl_end <= point && rl_editing_mode == vi_mode) 303 point = _rl_find_prev_mbchar (rl_line_buffer, rl_end, MB_FIND_NONZERO); 304#endif 305 306 if (rl_point == point) 307 rl_ding (); 308 309 rl_point = point; 310 311 if (rl_end < 0) 312 rl_end = 0; 313 } 314 315 return 0; 316} 317#else /* !HANDLE_MULTIBYTE */ 318int 319rl_forward_char (count, key) 320 int count, key; 321{ 322 return (rl_forward_byte (count, key)); 323} 324#endif /* !HANDLE_MULTIBYTE */ 325 326/* Backwards compatibility. */ 327int 328rl_forward (count, key) 329 int count, key; 330{ 331 return (rl_forward_char (count, key)); 332} 333 334/* Move backward COUNT bytes. */ 335int 336rl_backward_byte (count, key) 337 int count, key; 338{ 339 if (count < 0) 340 return (rl_forward_byte (-count, key)); 341 342 if (count > 0) 343 { 344 if (rl_point < count) 345 { 346 rl_point = 0; 347 rl_ding (); 348 } 349 else 350 rl_point -= count; 351 } 352 353 if (rl_point < 0) 354 rl_point = 0; 355 356 return 0; 357} 358 359#if defined (HANDLE_MULTIBYTE) 360/* Move backward COUNT characters. */ 361int 362rl_backward_char (count, key) 363 int count, key; 364{ 365 int point; 366 367 if (MB_CUR_MAX == 1 || rl_byte_oriented) 368 return (rl_backward_byte (count, key)); 369 370 if (count < 0) 371 return (rl_forward_char (-count, key)); 372 373 if (count > 0) 374 { 375 point = rl_point; 376 377 while (count > 0 && point > 0) 378 { 379 point = _rl_find_prev_mbchar (rl_line_buffer, point, MB_FIND_NONZERO); 380 count--; 381 } 382 if (count > 0) 383 { 384 rl_point = 0; 385 rl_ding (); 386 } 387 else 388 rl_point = point; 389 } 390 391 return 0; 392} 393#else 394int 395rl_backward_char (count, key) 396 int count, key; 397{ 398 return (rl_backward_byte (count, key)); 399} 400#endif 401 402/* Backwards compatibility. */ 403int 404rl_backward (count, key) 405 int count, key; 406{ 407 return (rl_backward_char (count, key)); 408} 409 410/* Move to the beginning of the line. */ 411int 412rl_beg_of_line (count, key) 413 int count, key; 414{ 415 rl_point = 0; 416 return 0; 417} 418 419/* Move to the end of the line. */ 420int 421rl_end_of_line (count, key) 422 int count, key; 423{ 424 rl_point = rl_end; 425 return 0; 426} 427 428/* Move forward a word. We do what Emacs does. Handles multibyte chars. */ 429int 430rl_forward_word (count, key) 431 int count, key; 432{ 433 int c; 434 435 if (count < 0) 436 return (rl_backward_word (-count, key)); 437 438 while (count) 439 { 440 if (rl_point == rl_end) 441 return 0; 442 443 /* If we are not in a word, move forward until we are in one. 444 Then, move forward until we hit a non-alphabetic character. */ 445 c = _rl_char_value (rl_line_buffer, rl_point); 446 447 if (_rl_walphabetic (c) == 0) 448 { 449 rl_point = MB_NEXTCHAR (rl_line_buffer, rl_point, 1, MB_FIND_NONZERO); 450 while (rl_point < rl_end) 451 { 452 c = _rl_char_value (rl_line_buffer, rl_point); 453 if (_rl_walphabetic (c)) 454 break; 455 rl_point = MB_NEXTCHAR (rl_line_buffer, rl_point, 1, MB_FIND_NONZERO); 456 } 457 } 458 459 if (rl_point == rl_end) 460 return 0; 461 462 rl_point = MB_NEXTCHAR (rl_line_buffer, rl_point, 1, MB_FIND_NONZERO); 463 while (rl_point < rl_end) 464 { 465 c = _rl_char_value (rl_line_buffer, rl_point); 466 if (_rl_walphabetic (c) == 0) 467 break; 468 rl_point = MB_NEXTCHAR (rl_line_buffer, rl_point, 1, MB_FIND_NONZERO); 469 } 470 471 --count; 472 } 473 474 return 0; 475} 476 477/* Move backward a word. We do what Emacs does. Handles multibyte chars. */ 478int 479rl_backward_word (count, key) 480 int count, key; 481{ 482 int c, p; 483 484 if (count < 0) 485 return (rl_forward_word (-count, key)); 486 487 while (count) 488 { 489 if (rl_point == 0) 490 return 0; 491 492 /* Like rl_forward_word (), except that we look at the characters 493 just before point. */ 494 495 p = MB_PREVCHAR (rl_line_buffer, rl_point, MB_FIND_NONZERO); 496 c = _rl_char_value (rl_line_buffer, p); 497 498 if (_rl_walphabetic (c) == 0) 499 { 500 rl_point = p; 501 while (rl_point > 0) 502 { 503 p = MB_PREVCHAR (rl_line_buffer, rl_point, MB_FIND_NONZERO); 504 c = _rl_char_value (rl_line_buffer, p); 505 if (_rl_walphabetic (c)) 506 break; 507 rl_point = p; 508 } 509 } 510 511 while (rl_point) 512 { 513 p = MB_PREVCHAR (rl_line_buffer, rl_point, MB_FIND_NONZERO); 514 c = _rl_char_value (rl_line_buffer, p); 515 if (_rl_walphabetic (c) == 0) 516 break; 517 else 518 rl_point = p; 519 } 520 521 --count; 522 } 523 524 return 0; 525} 526 527/* Clear the current line. Numeric argument to C-l does this. */ 528int 529rl_refresh_line (ignore1, ignore2) 530 int ignore1, ignore2; 531{ 532 int curr_line; 533 534 curr_line = _rl_current_display_line (); 535 536 _rl_move_vert (curr_line); 537 _rl_move_cursor_relative (0, rl_line_buffer); /* XXX is this right */ 538 539 _rl_clear_to_eol (0); /* arg of 0 means to not use spaces */ 540 541 rl_forced_update_display (); 542 rl_display_fixed = 1; 543 544 return 0; 545} 546 547/* C-l typed to a line without quoting clears the screen, and then reprints 548 the prompt and the current input line. Given a numeric arg, redraw only 549 the current line. */ 550int 551rl_clear_screen (count, key) 552 int count, key; 553{ 554 if (rl_explicit_arg) 555 { 556 rl_refresh_line (count, key); 557 return 0; 558 } 559 560 _rl_clear_screen (); /* calls termcap function to clear screen */ 561 rl_forced_update_display (); 562 rl_display_fixed = 1; 563 564 return 0; 565} 566 567int 568rl_arrow_keys (count, c) 569 int count, c; 570{ 571 int ch; 572 573 RL_SETSTATE(RL_STATE_MOREINPUT); 574 ch = rl_read_key (); 575 RL_UNSETSTATE(RL_STATE_MOREINPUT); 576 577 switch (_rl_to_upper (ch)) 578 { 579 case 'A': 580 rl_get_previous_history (count, ch); 581 break; 582 583 case 'B': 584 rl_get_next_history (count, ch); 585 break; 586 587 case 'C': 588 if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) 589 rl_forward_char (count, ch); 590 else 591 rl_forward_byte (count, ch); 592 break; 593 594 case 'D': 595 if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) 596 rl_backward_char (count, ch); 597 else 598 rl_backward_byte (count, ch); 599 break; 600 601 default: 602 rl_ding (); 603 } 604 605 return 0; 606} 607 608/* **************************************************************** */ 609/* */ 610/* Text commands */ 611/* */ 612/* **************************************************************** */ 613 614#ifdef HANDLE_MULTIBYTE 615static char pending_bytes[MB_LEN_MAX]; 616static int pending_bytes_length = 0; 617static mbstate_t ps = {0}; 618#endif 619 620/* Insert the character C at the current location, moving point forward. 621 If C introduces a multibyte sequence, we read the whole sequence and 622 then insert the multibyte char into the line buffer. */ 623int 624_rl_insert_char (count, c) 625 int count, c; 626{ 627 register int i; 628 char *string; 629#ifdef HANDLE_MULTIBYTE 630 int string_size; 631 char incoming[MB_LEN_MAX + 1]; 632 int incoming_length = 0; 633 mbstate_t ps_back; 634 static int stored_count = 0; 635#endif 636 637 if (count <= 0) 638 return 0; 639 640#if defined (HANDLE_MULTIBYTE) 641 if (MB_CUR_MAX == 1 || rl_byte_oriented) 642 { 643 incoming[0] = c; 644 incoming[1] = '\0'; 645 incoming_length = 1; 646 } 647 else 648 { 649 wchar_t wc; 650 size_t ret; 651 652 if (stored_count <= 0) 653 stored_count = count; 654 else 655 count = stored_count; 656 657 ps_back = ps; 658 pending_bytes[pending_bytes_length++] = c; 659 ret = mbrtowc (&wc, pending_bytes, pending_bytes_length, &ps); 660 661 if (ret == (size_t)-2) 662 { 663 /* Bytes too short to compose character, try to wait for next byte. 664 Restore the state of the byte sequence, because in this case the 665 effect of mbstate is undefined. */ 666 ps = ps_back; 667 return 1; 668 } 669 else if (ret == (size_t)-1) 670 { 671 /* Invalid byte sequence for the current locale. Treat first byte 672 as a single character. */ 673 incoming[0] = pending_bytes[0]; 674 incoming[1] = '\0'; 675 incoming_length = 1; 676 pending_bytes_length--; 677 memmove (pending_bytes, pending_bytes + 1, pending_bytes_length); 678 /* Clear the state of the byte sequence, because in this case the 679 effect of mbstate is undefined. */ 680 memset (&ps, 0, sizeof (mbstate_t)); 681 } 682 else if (ret == (size_t)0) 683 { 684 incoming[0] = '\0'; 685 incoming_length = 0; 686 pending_bytes_length--; 687 /* Clear the state of the byte sequence, because in this case the 688 effect of mbstate is undefined. */ 689 memset (&ps, 0, sizeof (mbstate_t)); 690 } 691 else 692 { 693 /* We successfully read a single multibyte character. */ 694 memcpy (incoming, pending_bytes, pending_bytes_length); 695 incoming[pending_bytes_length] = '\0'; 696 incoming_length = pending_bytes_length; 697 pending_bytes_length = 0; 698 } 699 } 700#endif /* HANDLE_MULTIBYTE */ 701 702 /* If we can optimize, then do it. But don't let people crash 703 readline because of extra large arguments. */ 704 if (count > 1 && count <= 1024) 705 { 706#if defined (HANDLE_MULTIBYTE) 707 string_size = count * incoming_length; 708 string = (char *)xmalloc (1 + string_size); 709 710 i = 0; 711 while (i < string_size) 712 { 713 strncpy (string + i, incoming, incoming_length); 714 i += incoming_length; 715 } 716 incoming_length = 0; 717 stored_count = 0; 718#else /* !HANDLE_MULTIBYTE */ 719 string = (char *)xmalloc (1 + count); 720 721 for (i = 0; i < count; i++) 722 string[i] = c; 723#endif /* !HANDLE_MULTIBYTE */ 724 725 string[i] = '\0'; 726 rl_insert_text (string); 727 free (string); 728 729 return 0; 730 } 731 732 if (count > 1024) 733 { 734 int decreaser; 735#if defined (HANDLE_MULTIBYTE) 736 string_size = incoming_length * 1024; 737 string = (char *)xmalloc (1 + string_size); 738 739 i = 0; 740 while (i < string_size) 741 { 742 strncpy (string + i, incoming, incoming_length); 743 i += incoming_length; 744 } 745 746 while (count) 747 { 748 decreaser = (count > 1024) ? 1024 : count; 749 string[decreaser*incoming_length] = '\0'; 750 rl_insert_text (string); 751 count -= decreaser; 752 } 753 754 free (string); 755 incoming_length = 0; 756 stored_count = 0; 757#else /* !HANDLE_MULTIBYTE */ 758 char str[1024+1]; 759 760 for (i = 0; i < 1024; i++) 761 str[i] = c; 762 763 while (count) 764 { 765 decreaser = (count > 1024 ? 1024 : count); 766 str[decreaser] = '\0'; 767 rl_insert_text (str); 768 count -= decreaser; 769 } 770#endif /* !HANDLE_MULTIBYTE */ 771 772 return 0; 773 } 774 775 if (MB_CUR_MAX == 1 || rl_byte_oriented) 776 { 777 /* We are inserting a single character. 778 If there is pending input, then make a string of all of the 779 pending characters that are bound to rl_insert, and insert 780 them all. */ 781 if (_rl_any_typein ()) 782 _rl_insert_typein (c); 783 else 784 { 785 /* Inserting a single character. */ 786 char str[2]; 787 788 str[1] = '\0'; 789 str[0] = c; 790 rl_insert_text (str); 791 } 792 } 793#if defined (HANDLE_MULTIBYTE) 794 else 795 { 796 rl_insert_text (incoming); 797 stored_count = 0; 798 } 799#endif 800 801 return 0; 802} 803 804/* Overwrite the character at point (or next COUNT characters) with C. 805 If C introduces a multibyte character sequence, read the entire sequence 806 before starting the overwrite loop. */ 807int 808_rl_overwrite_char (count, c) 809 int count, c; 810{ 811 int i; 812#if defined (HANDLE_MULTIBYTE) 813 char mbkey[MB_LEN_MAX]; 814 int k; 815 816 /* Read an entire multibyte character sequence to insert COUNT times. */ 817 if (count > 0 && MB_CUR_MAX > 1 && rl_byte_oriented == 0) 818 k = _rl_read_mbstring (c, mbkey, MB_LEN_MAX); 819#endif 820 821 rl_begin_undo_group (); 822 823 for (i = 0; i < count; i++) 824 { 825#if defined (HANDLE_MULTIBYTE) 826 if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) 827 rl_insert_text (mbkey); 828 else 829#endif 830 _rl_insert_char (1, c); 831 832 if (rl_point < rl_end) 833 rl_delete (1, c); 834 } 835 836 rl_end_undo_group (); 837 838 return 0; 839} 840 841int 842rl_insert (count, c) 843 int count, c; 844{ 845 return (rl_insert_mode == RL_IM_INSERT ? _rl_insert_char (count, c) 846 : _rl_overwrite_char (count, c)); 847} 848 849/* Insert the next typed character verbatim. */ 850static int 851_rl_insert_next (count) 852 int count; 853{ 854 int c; 855 856 RL_SETSTATE(RL_STATE_MOREINPUT); 857 c = rl_read_key (); 858 RL_UNSETSTATE(RL_STATE_MOREINPUT); 859 860#if defined (HANDLE_SIGNALS) 861 if (RL_ISSTATE (RL_STATE_CALLBACK) == 0) 862 _rl_restore_tty_signals (); 863#endif 864 865 return (_rl_insert_char (count, c)); 866} 867 868#if defined (READLINE_CALLBACKS) 869static int 870_rl_insert_next_callback (data) 871 _rl_callback_generic_arg *data; 872{ 873 int count; 874 875 count = data->count; 876 877 /* Deregister function, let rl_callback_read_char deallocate data */ 878 _rl_callback_func = 0; 879 _rl_want_redisplay = 1; 880 881 return _rl_insert_next (count); 882} 883#endif 884 885int 886rl_quoted_insert (count, key) 887 int count, key; 888{ 889 /* Let's see...should the callback interface futz with signal handling? */ 890#if defined (HANDLE_SIGNALS) 891 if (RL_ISSTATE (RL_STATE_CALLBACK) == 0) 892 _rl_disable_tty_signals (); 893#endif 894 895#if defined (READLINE_CALLBACKS) 896 if (RL_ISSTATE (RL_STATE_CALLBACK)) 897 { 898 _rl_callback_data = _rl_callback_data_alloc (count); 899 _rl_callback_func = _rl_insert_next_callback; 900 return (0); 901 } 902#endif 903 904 return _rl_insert_next (count); 905} 906 907/* Insert a tab character. */ 908int 909rl_tab_insert (count, key) 910 int count, key; 911{ 912 return (_rl_insert_char (count, '\t')); 913} 914 915/* What to do when a NEWLINE is pressed. We accept the whole line. 916 KEY is the key that invoked this command. I guess it could have 917 meaning in the future. */ 918int 919rl_newline (count, key) 920 int count, key; 921{ 922 rl_done = 1; 923 924 if (_rl_history_preserve_point) 925 _rl_history_saved_point = (rl_point == rl_end) ? -1 : rl_point; 926 927 RL_SETSTATE(RL_STATE_DONE); 928 929#if defined (VI_MODE) 930 if (rl_editing_mode == vi_mode) 931 { 932 _rl_vi_done_inserting (); 933 if (_rl_vi_textmod_command (_rl_vi_last_command) == 0) /* XXX */ 934 _rl_vi_reset_last (); 935 } 936#endif /* VI_MODE */ 937 938 /* If we've been asked to erase empty lines, suppress the final update, 939 since _rl_update_final calls rl_crlf(). */ 940 if (rl_erase_empty_line && rl_point == 0 && rl_end == 0) 941 return 0; 942 943 if (readline_echoing_p) 944 _rl_update_final (); 945 return 0; 946} 947 948/* What to do for some uppercase characters, like meta characters, 949 and some characters appearing in emacs_ctlx_keymap. This function 950 is just a stub, you bind keys to it and the code in _rl_dispatch () 951 is special cased. */ 952int 953rl_do_lowercase_version (ignore1, ignore2) 954 int ignore1, ignore2; 955{ 956 return 0; 957} 958 959/* This is different from what vi does, so the code's not shared. Emacs 960 rubout in overwrite mode has one oddity: it replaces a control 961 character that's displayed as two characters (^X) with two spaces. */ 962int 963_rl_overwrite_rubout (count, key) 964 int count, key; 965{ 966 int opoint; 967 int i, l; 968 969 if (rl_point == 0) 970 { 971 rl_ding (); 972 return 1; 973 } 974 975 opoint = rl_point; 976 977 /* L == number of spaces to insert */ 978 for (i = l = 0; i < count; i++) 979 { 980 rl_backward_char (1, key); 981 l += rl_character_len (rl_line_buffer[rl_point], rl_point); /* not exactly right */ 982 } 983 984 rl_begin_undo_group (); 985 986 if (count > 1 || rl_explicit_arg) 987 rl_kill_text (opoint, rl_point); 988 else 989 rl_delete_text (opoint, rl_point); 990 991 /* Emacs puts point at the beginning of the sequence of spaces. */ 992 if (rl_point < rl_end) 993 { 994 opoint = rl_point; 995 _rl_insert_char (l, ' '); 996 rl_point = opoint; 997 } 998 999 rl_end_undo_group (); 1000 1001 return 0; 1002} 1003 1004/* Rubout the character behind point. */ 1005int 1006rl_rubout (count, key) 1007 int count, key; 1008{ 1009 if (count < 0) 1010 return (rl_delete (-count, key)); 1011 1012 if (!rl_point) 1013 { 1014 rl_ding (); 1015 return -1; 1016 } 1017 1018 if (rl_insert_mode == RL_IM_OVERWRITE) 1019 return (_rl_overwrite_rubout (count, key)); 1020 1021 return (_rl_rubout_char (count, key)); 1022} 1023 1024int 1025_rl_rubout_char (count, key) 1026 int count, key; 1027{ 1028 int orig_point; 1029 unsigned char c; 1030 1031 /* Duplicated code because this is called from other parts of the library. */ 1032 if (count < 0) 1033 return (rl_delete (-count, key)); 1034 1035 if (rl_point == 0) 1036 { 1037 rl_ding (); 1038 return -1; 1039 } 1040 1041 orig_point = rl_point; 1042 if (count > 1 || rl_explicit_arg) 1043 { 1044 rl_backward_char (count, key); 1045 rl_kill_text (orig_point, rl_point); 1046 } 1047 else if (MB_CUR_MAX == 1 || rl_byte_oriented) 1048 { 1049 c = rl_line_buffer[--rl_point]; 1050 rl_delete_text (rl_point, orig_point); 1051 /* The erase-at-end-of-line hack is of questionable merit now. */ 1052 if (rl_point == rl_end && ISPRINT (c) && _rl_last_c_pos) 1053 { 1054 int l; 1055 l = rl_character_len (c, rl_point); 1056 _rl_erase_at_end_of_line (l); 1057 } 1058 } 1059 else 1060 { 1061 rl_point = _rl_find_prev_mbchar (rl_line_buffer, rl_point, MB_FIND_NONZERO); 1062 rl_delete_text (rl_point, orig_point); 1063 } 1064 1065 return 0; 1066} 1067 1068/* Delete the character under the cursor. Given a numeric argument, 1069 kill that many characters instead. */ 1070int 1071rl_delete (count, key) 1072 int count, key; 1073{ 1074 if (count < 0) 1075 return (_rl_rubout_char (-count, key)); 1076 1077 if (rl_point == rl_end) 1078 { 1079 rl_ding (); 1080 return -1; 1081 } 1082 1083 if (count > 1 || rl_explicit_arg) 1084 { 1085 int orig_point = rl_point; 1086 if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) 1087 rl_forward_char (count, key); 1088 else 1089 rl_forward_byte (count, key); 1090 1091 rl_kill_text (orig_point, rl_point); 1092 rl_point = orig_point; 1093 } 1094 else 1095 { 1096 int new_point; 1097 1098 new_point = MB_NEXTCHAR (rl_line_buffer, rl_point, 1, MB_FIND_NONZERO); 1099 rl_delete_text (rl_point, new_point); 1100 } 1101 return 0; 1102} 1103 1104/* Delete the character under the cursor, unless the insertion 1105 point is at the end of the line, in which case the character 1106 behind the cursor is deleted. COUNT is obeyed and may be used 1107 to delete forward or backward that many characters. */ 1108int 1109rl_rubout_or_delete (count, key) 1110 int count, key; 1111{ 1112 if (rl_end != 0 && rl_point == rl_end) 1113 return (_rl_rubout_char (count, key)); 1114 else 1115 return (rl_delete (count, key)); 1116} 1117 1118/* Delete all spaces and tabs around point. */ 1119int 1120rl_delete_horizontal_space (count, ignore) 1121 int count, ignore; 1122{ 1123 int start = rl_point; 1124 1125 while (rl_point && whitespace (rl_line_buffer[rl_point - 1])) 1126 rl_point--; 1127 1128 start = rl_point; 1129 1130 while (rl_point < rl_end && whitespace (rl_line_buffer[rl_point])) 1131 rl_point++; 1132 1133 if (start != rl_point) 1134 { 1135 rl_delete_text (start, rl_point); 1136 rl_point = start; 1137 } 1138 1139 if (rl_point < 0) 1140 rl_point = 0; 1141 1142 return 0; 1143} 1144 1145/* Like the tcsh editing function delete-char-or-list. The eof character 1146 is caught before this is invoked, so this really does the same thing as 1147 delete-char-or-list-or-eof, as long as it's bound to the eof character. */ 1148int 1149rl_delete_or_show_completions (count, key) 1150 int count, key; 1151{ 1152 if (rl_end != 0 && rl_point == rl_end) 1153 return (rl_possible_completions (count, key)); 1154 else 1155 return (rl_delete (count, key)); 1156} 1157 1158#ifndef RL_COMMENT_BEGIN_DEFAULT 1159#define RL_COMMENT_BEGIN_DEFAULT "#" 1160#endif 1161 1162/* Turn the current line into a comment in shell history. 1163 A K*rn shell style function. */ 1164int 1165rl_insert_comment (count, key) 1166 int count, key; 1167{ 1168 char *rl_comment_text; 1169 int rl_comment_len; 1170 1171 rl_beg_of_line (1, key); 1172 rl_comment_text = _rl_comment_begin ? _rl_comment_begin : RL_COMMENT_BEGIN_DEFAULT; 1173 1174 if (rl_explicit_arg == 0) 1175 rl_insert_text (rl_comment_text); 1176 else 1177 { 1178 rl_comment_len = strlen (rl_comment_text); 1179 if (STREQN (rl_comment_text, rl_line_buffer, rl_comment_len)) 1180 rl_delete_text (rl_point, rl_point + rl_comment_len); 1181 else 1182 rl_insert_text (rl_comment_text); 1183 } 1184 1185 (*rl_redisplay_function) (); 1186 rl_newline (1, '\n'); 1187 1188 return (0); 1189} 1190 1191/* **************************************************************** */ 1192/* */ 1193/* Changing Case */ 1194/* */ 1195/* **************************************************************** */ 1196 1197/* The three kinds of things that we know how to do. */ 1198#define UpCase 1 1199#define DownCase 2 1200#define CapCase 3 1201 1202/* Uppercase the word at point. */ 1203int 1204rl_upcase_word (count, key) 1205 int count, key; 1206{ 1207 return (rl_change_case (count, UpCase)); 1208} 1209 1210/* Lowercase the word at point. */ 1211int 1212rl_downcase_word (count, key) 1213 int count, key; 1214{ 1215 return (rl_change_case (count, DownCase)); 1216} 1217 1218/* Upcase the first letter, downcase the rest. */ 1219int 1220rl_capitalize_word (count, key) 1221 int count, key; 1222{ 1223 return (rl_change_case (count, CapCase)); 1224} 1225 1226/* The meaty function. 1227 Change the case of COUNT words, performing OP on them. 1228 OP is one of UpCase, DownCase, or CapCase. 1229 If a negative argument is given, leave point where it started, 1230 otherwise, leave it where it moves to. */ 1231static int 1232rl_change_case (count, op) 1233 int count, op; 1234{ 1235 int start, next, end; 1236 int inword, c, nc, nop; 1237#if defined (HANDLE_MULTIBYTE) 1238 wchar_t wc, nwc; 1239 char mb[MB_LEN_MAX+1]; 1240 int mblen, p; 1241 mbstate_t ps; 1242#endif 1243 1244 start = rl_point; 1245 rl_forward_word (count, 0); 1246 end = rl_point; 1247 1248 if (op != UpCase && op != DownCase && op != CapCase) 1249 { 1250 rl_ding (); 1251 return -1; 1252 } 1253 1254 if (count < 0) 1255 SWAP (start, end); 1256 1257#if defined (HANDLE_MULTIBYTE) 1258 memset (&ps, 0, sizeof (mbstate_t)); 1259#endif 1260 1261 /* We are going to modify some text, so let's prepare to undo it. */ 1262 rl_modifying (start, end); 1263 1264 inword = 0; 1265 while (start < end) 1266 { 1267 c = _rl_char_value (rl_line_buffer, start); 1268 /* This assumes that the upper and lower case versions are the same width. */ 1269 next = MB_NEXTCHAR (rl_line_buffer, start, 1, MB_FIND_NONZERO); 1270 1271 if (_rl_walphabetic (c) == 0) 1272 { 1273 inword = 0; 1274 start = next; 1275 continue; 1276 } 1277 1278 if (op == CapCase) 1279 { 1280 nop = inword ? DownCase : UpCase; 1281 inword = 1; 1282 } 1283 else 1284 nop = op; 1285 if (MB_CUR_MAX == 1 || rl_byte_oriented || isascii (c)) 1286 { 1287 nc = (nop == UpCase) ? _rl_to_upper (c) : _rl_to_lower (c); 1288 rl_line_buffer[start] = nc; 1289 } 1290#if defined (HANDLE_MULTIBYTE) 1291 else 1292 { 1293 mbrtowc (&wc, rl_line_buffer + start, end - start, &ps); 1294 nwc = (nop == UpCase) ? _rl_to_wupper (wc) : _rl_to_wlower (wc); 1295 if (nwc != wc) /* just skip unchanged characters */ 1296 { 1297 mblen = wcrtomb (mb, nwc, &ps); 1298 if (mblen > 0) 1299 mb[mblen] = '\0'; 1300 /* Assume the same width */ 1301 strncpy (rl_line_buffer + start, mb, mblen); 1302 } 1303 } 1304#endif 1305 1306 start = next; 1307 } 1308 1309 rl_point = end; 1310 return 0; 1311} 1312 1313/* **************************************************************** */ 1314/* */ 1315/* Transposition */ 1316/* */ 1317/* **************************************************************** */ 1318 1319/* Transpose the words at point. If point is at the end of the line, 1320 transpose the two words before point. */ 1321int 1322rl_transpose_words (count, key) 1323 int count, key; 1324{ 1325 char *word1, *word2; 1326 int w1_beg, w1_end, w2_beg, w2_end; 1327 int orig_point = rl_point; 1328 1329 if (!count) 1330 return 0; 1331 1332 /* Find the two words. */ 1333 rl_forward_word (count, key); 1334 w2_end = rl_point; 1335 rl_backward_word (1, key); 1336 w2_beg = rl_point; 1337 rl_backward_word (count, key); 1338 w1_beg = rl_point; 1339 rl_forward_word (1, key); 1340 w1_end = rl_point; 1341 1342 /* Do some check to make sure that there really are two words. */ 1343 if ((w1_beg == w2_beg) || (w2_beg < w1_end)) 1344 { 1345 rl_ding (); 1346 rl_point = orig_point; 1347 return -1; 1348 } 1349 1350 /* Get the text of the words. */ 1351 word1 = rl_copy_text (w1_beg, w1_end); 1352 word2 = rl_copy_text (w2_beg, w2_end); 1353 1354 /* We are about to do many insertions and deletions. Remember them 1355 as one operation. */ 1356 rl_begin_undo_group (); 1357 1358 /* Do the stuff at word2 first, so that we don't have to worry 1359 about word1 moving. */ 1360 rl_point = w2_beg; 1361 rl_delete_text (w2_beg, w2_end); 1362 rl_insert_text (word1); 1363 1364 rl_point = w1_beg; 1365 rl_delete_text (w1_beg, w1_end); 1366 rl_insert_text (word2); 1367 1368 /* This is exactly correct since the text before this point has not 1369 changed in length. */ 1370 rl_point = w2_end; 1371 1372 /* I think that does it. */ 1373 rl_end_undo_group (); 1374 free (word1); 1375 free (word2); 1376 1377 return 0; 1378} 1379 1380/* Transpose the characters at point. If point is at the end of the line, 1381 then transpose the characters before point. */ 1382int 1383rl_transpose_chars (count, key) 1384 int count, key; 1385{ 1386#if defined (HANDLE_MULTIBYTE) 1387 char *dummy; 1388 int i; 1389#else 1390 char dummy[2]; 1391#endif 1392 int char_length, prev_point; 1393 1394 if (count == 0) 1395 return 0; 1396 1397 if (!rl_point || rl_end < 2) 1398 { 1399 rl_ding (); 1400 return -1; 1401 } 1402 1403 rl_begin_undo_group (); 1404 1405 if (rl_point == rl_end) 1406 { 1407 rl_point = MB_PREVCHAR (rl_line_buffer, rl_point, MB_FIND_NONZERO); 1408 count = 1; 1409 } 1410 1411 prev_point = rl_point; 1412 rl_point = MB_PREVCHAR (rl_line_buffer, rl_point, MB_FIND_NONZERO); 1413 1414#if defined (HANDLE_MULTIBYTE) 1415 char_length = prev_point - rl_point; 1416 dummy = (char *)xmalloc (char_length + 1); 1417 for (i = 0; i < char_length; i++) 1418 dummy[i] = rl_line_buffer[rl_point + i]; 1419 dummy[i] = '\0'; 1420#else 1421 dummy[0] = rl_line_buffer[rl_point]; 1422 dummy[char_length = 1] = '\0'; 1423#endif 1424 1425 rl_delete_text (rl_point, rl_point + char_length); 1426 1427 rl_point = _rl_find_next_mbchar (rl_line_buffer, rl_point, count, MB_FIND_NONZERO); 1428 1429 _rl_fix_point (0); 1430 rl_insert_text (dummy); 1431 rl_end_undo_group (); 1432 1433#if defined (HANDLE_MULTIBYTE) 1434 free (dummy); 1435#endif 1436 1437 return 0; 1438} 1439 1440/* **************************************************************** */ 1441/* */ 1442/* Character Searching */ 1443/* */ 1444/* **************************************************************** */ 1445 1446int 1447#if defined (HANDLE_MULTIBYTE) 1448_rl_char_search_internal (count, dir, smbchar, len) 1449 int count, dir; 1450 char *smbchar; 1451 int len; 1452#else 1453_rl_char_search_internal (count, dir, schar) 1454 int count, dir, schar; 1455#endif 1456{ 1457 int pos, inc; 1458#if defined (HANDLE_MULTIBYTE) 1459 int prepos; 1460#endif 1461 1462 pos = rl_point; 1463 inc = (dir < 0) ? -1 : 1; 1464 while (count) 1465 { 1466 if ((dir < 0 && pos <= 0) || (dir > 0 && pos >= rl_end)) 1467 { 1468 rl_ding (); 1469 return -1; 1470 } 1471 1472#if defined (HANDLE_MULTIBYTE) 1473 pos = (inc > 0) ? _rl_find_next_mbchar (rl_line_buffer, pos, 1, MB_FIND_ANY) 1474 : _rl_find_prev_mbchar (rl_line_buffer, pos, MB_FIND_ANY); 1475#else 1476 pos += inc; 1477#endif 1478 do 1479 { 1480#if defined (HANDLE_MULTIBYTE) 1481 if (_rl_is_mbchar_matched (rl_line_buffer, pos, rl_end, smbchar, len)) 1482#else 1483 if (rl_line_buffer[pos] == schar) 1484#endif 1485 { 1486 count--; 1487 if (dir < 0) 1488 rl_point = (dir == BTO) ? _rl_find_next_mbchar (rl_line_buffer, pos, 1, MB_FIND_ANY) 1489 : pos; 1490 else 1491 rl_point = (dir == FTO) ? _rl_find_prev_mbchar (rl_line_buffer, pos, MB_FIND_ANY) 1492 : pos; 1493 break; 1494 } 1495#if defined (HANDLE_MULTIBYTE) 1496 prepos = pos; 1497#endif 1498 } 1499#if defined (HANDLE_MULTIBYTE) 1500 while ((dir < 0) ? (pos = _rl_find_prev_mbchar (rl_line_buffer, pos, MB_FIND_ANY)) != prepos 1501 : (pos = _rl_find_next_mbchar (rl_line_buffer, pos, 1, MB_FIND_ANY)) != prepos); 1502#else 1503 while ((dir < 0) ? pos-- : ++pos < rl_end); 1504#endif 1505 } 1506 return (0); 1507} 1508 1509/* Search COUNT times for a character read from the current input stream. 1510 FDIR is the direction to search if COUNT is non-negative; otherwise 1511 the search goes in BDIR. So much is dependent on HANDLE_MULTIBYTE 1512 that there are two separate versions of this function. */ 1513#if defined (HANDLE_MULTIBYTE) 1514static int 1515_rl_char_search (count, fdir, bdir) 1516 int count, fdir, bdir; 1517{ 1518 char mbchar[MB_LEN_MAX]; 1519 int mb_len; 1520 1521 mb_len = _rl_read_mbchar (mbchar, MB_LEN_MAX); 1522 1523 if (count < 0) 1524 return (_rl_char_search_internal (-count, bdir, mbchar, mb_len)); 1525 else 1526 return (_rl_char_search_internal (count, fdir, mbchar, mb_len)); 1527} 1528#else /* !HANDLE_MULTIBYTE */ 1529static int 1530_rl_char_search (count, fdir, bdir) 1531 int count, fdir, bdir; 1532{ 1533 int c; 1534 1535 RL_SETSTATE(RL_STATE_MOREINPUT); 1536 c = rl_read_key (); 1537 RL_UNSETSTATE(RL_STATE_MOREINPUT); 1538 1539 if (count < 0) 1540 return (_rl_char_search_internal (-count, bdir, c)); 1541 else 1542 return (_rl_char_search_internal (count, fdir, c)); 1543} 1544#endif /* !HANDLE_MULTIBYTE */ 1545 1546#if defined (READLINE_CALLBACKS) 1547static int 1548_rl_char_search_callback (data) 1549 _rl_callback_generic_arg *data; 1550{ 1551 _rl_callback_func = 0; 1552 _rl_want_redisplay = 1; 1553 1554 return (_rl_char_search (data->count, data->i1, data->i2)); 1555} 1556#endif 1557 1558int 1559rl_char_search (count, key) 1560 int count, key; 1561{ 1562#if defined (READLINE_CALLBACKS) 1563 if (RL_ISSTATE (RL_STATE_CALLBACK)) 1564 { 1565 _rl_callback_data = _rl_callback_data_alloc (count); 1566 _rl_callback_data->i1 = FFIND; 1567 _rl_callback_data->i2 = BFIND; 1568 _rl_callback_func = _rl_char_search_callback; 1569 return (0); 1570 } 1571#endif 1572 1573 return (_rl_char_search (count, FFIND, BFIND)); 1574} 1575 1576int 1577rl_backward_char_search (count, key) 1578 int count, key; 1579{ 1580#if defined (READLINE_CALLBACKS) 1581 if (RL_ISSTATE (RL_STATE_CALLBACK)) 1582 { 1583 _rl_callback_data = _rl_callback_data_alloc (count); 1584 _rl_callback_data->i1 = BFIND; 1585 _rl_callback_data->i2 = FFIND; 1586 _rl_callback_func = _rl_char_search_callback; 1587 return (0); 1588 } 1589#endif 1590 1591 return (_rl_char_search (count, BFIND, FFIND)); 1592} 1593 1594/* **************************************************************** */ 1595/* */ 1596/* The Mark and the Region. */ 1597/* */ 1598/* **************************************************************** */ 1599 1600/* Set the mark at POSITION. */ 1601int 1602_rl_set_mark_at_pos (position) 1603 int position; 1604{ 1605 if (position > rl_end) 1606 return -1; 1607 1608 rl_mark = position; 1609 return 0; 1610} 1611 1612/* A bindable command to set the mark. */ 1613int 1614rl_set_mark (count, key) 1615 int count, key; 1616{ 1617 return (_rl_set_mark_at_pos (rl_explicit_arg ? count : rl_point)); 1618} 1619 1620/* Exchange the position of mark and point. */ 1621int 1622rl_exchange_point_and_mark (count, key) 1623 int count, key; 1624{ 1625 if (rl_mark > rl_end) 1626 rl_mark = -1; 1627 1628 if (rl_mark == -1) 1629 { 1630 rl_ding (); 1631 return -1; 1632 } 1633 else 1634 SWAP (rl_point, rl_mark); 1635 1636 return 0; 1637} 1638