readline/bind.c

   1 /* bind.c -- key binding and startup file support for the readline library. */
   2
   3 /* Copyright (C) 1987, 1989, 1992 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 #include <stdio.h>
  29 #include <sys/types.h>
  30 #include <fcntl.h>
  31 #if defined (HAVE_SYS_FILE_H)
  32 #  include <sys/file.h>
  33 #endif /* HAVE_SYS_FILE_H */
  34
  35 #if defined (HAVE_UNISTD_H)
  36 #  include <unistd.h>
  37 #endif /* HAVE_UNISTD_H */
  38
  39 #if defined (HAVE_STDLIB_H)
  40 #  include <stdlib.h>
  41 #else
  42 #  include "ansi_stdlib.h"
  43 #endif /* HAVE_STDLIB_H */
  44
  45 #include <errno.h>
  46
  47 #if !defined (errno)
  48 extern int errno;
  49 #endif /* !errno */
  50
  51 #include "posixstat.h"
  52
  53 /* System-specific feature definitions and include files. */
  54 #include "rldefs.h"
  55
  56 /* Some standard library routines. */
  57 #include "readline.h"
  58 #include "history.h"
  59
  60 #include "rlprivate.h"
  61 #include "rlshell.h"
  62 #include "xmalloc.h"
  63
  64 #if !defined (strchr) && !defined (__STDC__)
  65 extern char *strchr (), *strrchr ();
  66 #endif /* !strchr && !__STDC__ */
  67
  68 /* Variables exported by this file. */
  69 Keymap rl_binding_keymap;
  70
  71 static int _rl_read_init_file __P((char *, int));
  72 static int glean_key_from_name __P((char *));
  73 static int substring_member_of_array __P((char *, char **));
  74
  75 static int currently_reading_init_file;
  76
  77 /* used only in this file */
  78 static int _rl_prefer_visible_bell = 1;
  79
  80 /* **************************************************************** */
  81 /*                                                                  */
  82 /*                      Binding keys                                */
  83 /*                                                                  */
  84 /* **************************************************************** */
  85
  86 /* rl_add_defun (char *name, Function *function, int key)
  87    Add NAME to the list of named functions.  Make FUNCTION be the function
  88    that gets called.  If KEY is not -1, then bind it. */
  89 int
  90 rl_add_defun (name, function, key)
  91      char *name;
  92      Function *function;
  93      int key;
  94 {
  95   if (key != -1)
  96     rl_bind_key (key, function);
  97   rl_add_funmap_entry (name, function);
  98   return 0;
  99 }
 100
 101 /* Bind KEY to FUNCTION.  Returns non-zero if KEY is out of range. */
 102 int
 103 rl_bind_key (key, function)
 104      int key;
 105      Function *function;
 106 {
 107   if (key < 0)
 108     return (key);
 109
 110   if (META_CHAR (key) && _rl_convert_meta_chars_to_ascii)
 111     {
 112       if (_rl_keymap[ESC].type == ISKMAP)
 113         {
 114           Keymap escmap;
 115
 116           escmap = FUNCTION_TO_KEYMAP (_rl_keymap, ESC);
 117           key = UNMETA (key);
 118           escmap[key].type = ISFUNC;
 119           escmap[key].function = function;
 120           return (0);
 121         }
 122       return (key);
 123     }
 124
 125   _rl_keymap[key].type = ISFUNC;
 126   _rl_keymap[key].function = function;
 127   rl_binding_keymap = _rl_keymap;
 128   return (0);
 129 }
 130
 131 /* Bind KEY to FUNCTION in MAP.  Returns non-zero in case of invalid
 132    KEY. */
 133 int
 134 rl_bind_key_in_map (key, function, map)
 135      int key;
 136      Function *function;
 137      Keymap map;
 138 {
 139   int result;
 140   Keymap oldmap;
 141
 142   oldmap = _rl_keymap;
 143   _rl_keymap = map;
 144   result = rl_bind_key (key, function);
 145   _rl_keymap = oldmap;
 146   return (result);
 147 }
 148
 149 /* Make KEY do nothing in the currently selected keymap.
 150    Returns non-zero in case of error. */
 151 int
 152 rl_unbind_key (key)
 153      int key;
 154 {
 155   return (rl_bind_key (key, (Function *)NULL));
 156 }
 157
 158 /* Make KEY do nothing in MAP.
 159    Returns non-zero in case of error. */
 160 int
 161 rl_unbind_key_in_map (key, map)
 162      int key;
 163      Keymap map;
 164 {
 165   return (rl_bind_key_in_map (key, (Function *)NULL, map));
 166 }
 167
 168 /* Unbind all keys bound to FUNCTION in MAP. */
 169 int
 170 rl_unbind_function_in_map (func, map)
 171      Function *func;
 172      Keymap map;
 173 {
 174   register int i, rval;
 175
 176   for (i = rval = 0; i < KEYMAP_SIZE; i++)
 177     {
 178       if (map[i].type == ISFUNC && map[i].function == func)
 179         {
 180           map[i].function = (Function *)NULL;
 181           rval = 1;
 182         }
 183     }
 184   return rval;
 185 }
 186
 187 int
 188 rl_unbind_command_in_map (command, map)
 189      char *command;
 190      Keymap map;
 191 {
 192   Function *func;
 193
 194   func = rl_named_function (command);
 195   if (func == 0)
 196     return 0;
 197   return (rl_unbind_function_in_map (func, map));
 198 }
 199
 200 /* Bind the key sequence represented by the string KEYSEQ to
 201    FUNCTION.  This makes new keymaps as necessary.  The initial
 202    place to do bindings is in MAP. */
 203 int
 204 rl_set_key (keyseq, function, map)
 205      char *keyseq;
 206      Function *function;
 207      Keymap map;
 208 {
 209   return (rl_generic_bind (ISFUNC, keyseq, (char *)function, map));
 210 }
 211
 212 /* Bind the key sequence represented by the string KEYSEQ to
 213    the string of characters MACRO.  This makes new keymaps as
 214    necessary.  The initial place to do bindings is in MAP. */
 215 int
 216 rl_macro_bind (keyseq, macro, map)
 217      char *keyseq, *macro;
 218      Keymap map;
 219 {
 220   char *macro_keys;
 221   int macro_keys_len;
 222
 223   macro_keys = (char *)xmalloc ((2 * strlen (macro)) + 1);
 224
 225   if (rl_translate_keyseq (macro, macro_keys, &macro_keys_len))
 226     {
 227       free (macro_keys);
 228       return -1;
 229     }
 230   rl_generic_bind (ISMACR, keyseq, macro_keys, map);
 231   return 0;
 232 }
 233
 234 /* Bind the key sequence represented by the string KEYSEQ to
 235    the arbitrary pointer DATA.  TYPE says what kind of data is
 236    pointed to by DATA, right now this can be a function (ISFUNC),
 237    a macro (ISMACR), or a keymap (ISKMAP).  This makes new keymaps
 238    as necessary.  The initial place to do bindings is in MAP. */
 239 int
 240 rl_generic_bind (type, keyseq, data, map)
 241      int type;
 242      char *keyseq, *data;
 243      Keymap map;
 244 {
 245   char *keys;
 246   int keys_len;
 247   register int i;
 248
 249   /* If no keys to bind to, exit right away. */
 250   if (!keyseq || !*keyseq)
 251     {
 252       if (type == ISMACR)
 253         free (data);
 254       return -1;
 255     }
 256
 257   keys = xmalloc (1 + (2 * strlen (keyseq)));
 258
 259   /* Translate the ASCII representation of KEYSEQ into an array of
 260      characters.  Stuff the characters into KEYS, and the length of
 261      KEYS into KEYS_LEN. */
 262   if (rl_translate_keyseq (keyseq, keys, &keys_len))
 263     {
 264       free (keys);
 265       return -1;
 266     }
 267
 268   /* Bind keys, making new keymaps as necessary. */
 269   for (i = 0; i < keys_len; i++)
 270     {
 271       int ic = (int) ((unsigned char)keys[i]);
 272
 273       if (_rl_convert_meta_chars_to_ascii && META_CHAR (ic))
 274         {
 275           ic = UNMETA (ic);
 276           if (map[ESC].type == ISKMAP)
 277             map = FUNCTION_TO_KEYMAP (map, ESC);
 278         }
 279
 280       if ((i + 1) < keys_len)
 281         {
 282           if (map[ic].type != ISKMAP)
 283             {
 284               if (map[ic].type == ISMACR)
 285                 free ((char *)map[ic].function);
 286
 287               map[ic].type = ISKMAP;
 288               map[ic].function = KEYMAP_TO_FUNCTION (rl_make_bare_keymap());
 289             }
 290           map = FUNCTION_TO_KEYMAP (map, ic);
 291         }
 292       else
 293         {
 294           if (map[ic].type == ISMACR)
 295             free ((char *)map[ic].function);
 296
 297           map[ic].function = KEYMAP_TO_FUNCTION (data);
 298           map[ic].type = type;
 299         }
 300
 301       rl_binding_keymap = map;
 302     }
 303   free (keys);
 304   return 0;
 305 }
 306
 307 /* Translate the ASCII representation of SEQ, stuffing the values into ARRAY,
 308    an array of characters.  LEN gets the final length of ARRAY.  Return
 309    non-zero if there was an error parsing SEQ. */
 310 int
 311 rl_translate_keyseq (seq, array, len)
 312      char *seq, *array;
 313      int *len;
 314 {
 315   register int i, c, l, temp;
 316
 317   for (i = l = 0; c = seq[i]; i++)
 318     {
 319       if (c == '\\')
 320         {
 321           c = seq[++i];
 322
 323           if (c == 0)
 324             break;
 325
 326           /* Handle \C- and \M- prefixes. */
 327           if ((c == 'C' || c == 'M') && seq[i + 1] == '-')
 328             {
 329               /* Handle special case of backwards define. */
 330               if (strncmp (&seq[i], "C-\\M-", 5) == 0)
 331                 {
 332                   array[l++] = ESC;
 333                   i += 5;
 334                   array[l++] = CTRL (_rl_to_upper (seq[i]));
 335                   if (seq[i] == '\0')
 336                     i--;
 337                 }
 338               else if (c == 'M')
 339                 {
 340                   i++;
 341                   array[l++] = ESC;     /* XXX */
 342                 }
 343               else if (c == 'C')
 344                 {
 345                   i += 2;
 346                   /* Special hack for C-?... */
 347                   array[l++] = (seq[i] == '?') ? RUBOUT : CTRL (_rl_to_upper (seq[i]));
 348                 }
 349               continue;
 350             }
 351
 352           /* Translate other backslash-escaped characters.  These are the
 353              same escape sequences that bash's `echo' and `printf' builtins
 354              handle, with the addition of \d -> RUBOUT.  A backslash
 355              preceding a character that is not special is stripped. */
 356           switch (c)
 357             {
 358             case 'a':
 359               array[l++] = '\007';
 360               break;
 361             case 'b':
 362               array[l++] = '\b';
 363               break;
 364             case 'd':
 365               array[l++] = RUBOUT;      /* readline-specific */
 366               break;
 367             case 'e':
 368               array[l++] = ESC;
 369               break;
 370             case 'f':
 371               array[l++] = '\f';
 372               break;
 373             case 'n':
 374               array[l++] = NEWLINE;
 375               break;
 376             case 'r':
 377               array[l++] = RETURN;
 378               break;
 379             case 't':
 380               array[l++] = TAB;
 381               break;
 382             case 'v':
 383               array[l++] = 0x0B;
 384               break;
 385             case '\\':
 386               array[l++] = '\\';
 387               break;
 388             case '0': case '1': case '2': case '3':
 389             case '4': case '5': case '6': case '7':
 390               i++;
 391               for (temp = 2, c -= '0'; ISOCTAL (seq[i]) && temp--; i++)
 392                 c = (c * 8) + OCTVALUE (seq[i]);
 393               i--;      /* auto-increment in for loop */
 394               array[l++] = c % (largest_char + 1);
 395               break;
 396             case 'x':
 397               i++;
 398               for (temp = 3, c = 0; isxdigit (seq[i]) && temp--; i++)
 399                 c = (c * 16) + HEXVALUE (seq[i]);
 400               if (temp == 3)
 401                 c = 'x';
 402               i--;      /* auto-increment in for loop */
 403               array[l++] = c % (largest_char + 1);
 404               break;
 405             default:    /* backslashes before non-special chars just add the char */
 406               array[l++] = c;
 407               break;    /* the backslash is stripped */
 408             }
 409           continue;
 410         }
 411
 412       array[l++] = c;
 413     }
 414
 415   *len = l;
 416   array[l] = '\0';
 417   return (0);
 418 }
 419
 420 char *
 421 rl_untranslate_keyseq (seq)
 422      int seq;
 423 {
 424   static char kseq[16];
 425   int i, c;
 426
 427   i = 0;
 428   c = seq;
 429   if (META_CHAR (c))
 430     {
 431       kseq[i++] = '\\';
 432       kseq[i++] = 'M';
 433       kseq[i++] = '-';
 434       c = UNMETA (c);
 435     }
 436   else if (CTRL_CHAR (c))
 437     {
 438       kseq[i++] = '\\';
 439       kseq[i++] = 'C';
 440       kseq[i++] = '-';
 441       c = _rl_to_lower (UNCTRL (c));
 442     }
 443   else if (c == RUBOUT)
 444     {
 445       kseq[i++] = '\\';
 446       kseq[i++] = 'C';
 447       kseq[i++] = '-';
 448       c = '?';
 449     }
 450
 451   if (c == ESC)
 452     {
 453       kseq[i++] = '\\';
 454       c = 'e';
 455     }
 456   else if (c == '\\' || c == '"')
 457     {
 458       kseq[i++] = '\\';
 459     }
 460
 461   kseq[i++] = (unsigned char) c;
 462   kseq[i] = '\0';
 463   return kseq;
 464 }
 465
 466 static char *
 467 _rl_untranslate_macro_value (seq)
 468      char *seq;
 469 {
 470   char *ret, *r, *s;
 471   int c;
 472
 473   r = ret = xmalloc (7 * strlen (seq) + 1);
 474   for (s = seq; *s; s++)
 475     {
 476       c = *s;
 477       if (META_CHAR (c))
 478         {
 479           *r++ = '\\';
 480           *r++ = 'M';
 481           *r++ = '-';
 482           c = UNMETA (c);
 483         }
 484       else if (CTRL_CHAR (c) && c != ESC)
 485         {
 486           *r++ = '\\';
 487           *r++ = 'C';
 488           *r++ = '-';
 489           c = _rl_to_lower (UNCTRL (c));
 490         }
 491       else if (c == RUBOUT)
 492         {
 493           *r++ = '\\';
 494           *r++ = 'C';
 495           *r++ = '-';
 496           c = '?';
 497         }
 498
 499       if (c == ESC)
 500         {
 501           *r++ = '\\';
 502           c = 'e';
 503         }
 504       else if (c == '\\' || c == '"')
 505         *r++ = '\\';
 506
 507       *r++ = (unsigned char)c;
 508     }
 509   *r = '\0';
 510   return ret;
 511 }
 512
 513 /* Return a pointer to the function that STRING represents.
 514    If STRING doesn't have a matching function, then a NULL pointer
 515    is returned. */
 516 Function *
 517 rl_named_function (string)
 518      char *string;
 519 {
 520   register int i;
 521
 522   rl_initialize_funmap ();
 523
 524   for (i = 0; funmap[i]; i++)
 525     if (_rl_stricmp (funmap[i]->name, string) == 0)
 526       return (funmap[i]->function);
 527   return ((Function *)NULL);
 528 }
 529
 530 /* Return the function (or macro) definition which would be invoked via
 531    KEYSEQ if executed in MAP.  If MAP is NULL, then the current keymap is
 532    used.  TYPE, if non-NULL, is a pointer to an int which will receive the
 533    type of the object pointed to.  One of ISFUNC (function), ISKMAP (keymap),
 534    or ISMACR (macro). */
 535 Function *
 536 rl_function_of_keyseq (keyseq, map, type)
 537      char *keyseq;
 538      Keymap map;
 539      int *type;
 540 {
 541   register int i;
 542
 543   if (!map)
 544     map = _rl_keymap;
 545
 546   for (i = 0; keyseq && keyseq[i]; i++)
 547     {
 548       int ic = keyseq[i];
 549
 550       if (META_CHAR (ic) && _rl_convert_meta_chars_to_ascii)
 551         {
 552           if (map[ESC].type != ISKMAP)
 553             {
 554               if (type)
 555                 *type = map[ESC].type;
 556
 557               return (map[ESC].function);
 558             }
 559           else
 560             {
 561               map = FUNCTION_TO_KEYMAP (map, ESC);
 562               ic = UNMETA (ic);
 563             }
 564         }
 565
 566       if (map[ic].type == ISKMAP)
 567         {
 568           /* If this is the last key in the key sequence, return the
 569              map. */
 570           if (!keyseq[i + 1])
 571             {
 572               if (type)
 573                 *type = ISKMAP;
 574
 575               return (map[ic].function);
 576             }
 577           else
 578             map = FUNCTION_TO_KEYMAP (map, ic);
 579         }
 580       else
 581         {
 582           if (type)
 583             *type = map[ic].type;
 584
 585           return (map[ic].function);
 586         }
 587     }
 588   return ((Function *) NULL);
 589 }
 590
 591 /* The last key bindings file read. */
 592 static char *last_readline_init_file = (char *)NULL;
 593
 594 /* The file we're currently reading key bindings from. */
 595 static char *current_readline_init_file;
 596 static int current_readline_init_include_level;
 597 static int current_readline_init_lineno;
 598
 599 /* Read FILENAME into a locally-allocated buffer and return the buffer.
 600    The size of the buffer is returned in *SIZEP.  Returns NULL if any
 601    errors were encountered. */
 602 static char *
 603 _rl_read_file (filename, sizep)
 604      char *filename;
 605      size_t *sizep;
 606 {
 607   struct stat finfo;
 608   size_t file_size;
 609   char *buffer;
 610   int i, file;
 611
 612   if ((stat (filename, &finfo) < 0) || (file = open (filename, O_RDONLY, 0666)) < 0)
 613     return ((char *)NULL);
 614
 615   file_size = (size_t)finfo.st_size;
 616
 617   /* check for overflow on very large files */
 618   if (file_size != finfo.st_size || file_size + 1 < file_size)
 619     {
 620       if (file >= 0)
 621         close (file);
 622 #if defined (EFBIG)
 623       errno = EFBIG;
 624 #endif
 625       return ((char *)NULL);
 626     }
 627
 628   /* Read the file into BUFFER. */
 629   buffer = (char *)xmalloc (file_size + 1);
 630   i = read (file, buffer, file_size);
 631   close (file);
 632
 633 #if 0
 634   if (i < file_size)
 635 #else
 636   if (i < 0)
 637 #endif
 638     {
 639       free (buffer);
 640       return ((char *)NULL);
 641     }
 642
 643 #if 0
 644   buffer[file_size] = '\0';
 645   if (sizep)
 646     *sizep = file_size;
 647 #else
 648   buffer[i] = '\0';
 649   if (sizep)
 650     *sizep = i;
 651 #endif
 652
 653   return (buffer);
 654 }
 655
 656 /* Re-read the current keybindings file. */
 657 int
 658 rl_re_read_init_file (count, ignore)
 659      int count, ignore;
 660 {
 661   int r;
 662   r = rl_read_init_file ((char *)NULL);
 663   rl_set_keymap_from_edit_mode ();
 664   return r;
 665 }
 666
 667 /* Do key bindings from a file.  If FILENAME is NULL it defaults
 668    to the first non-null filename from this list:
 669      1. the filename used for the previous call
 670      2. the value of the shell variable `INPUTRC'
 671      3. ~/.inputrc
 672    If the file existed and could be opened and read, 0 is returned,
 673    otherwise errno is returned. */
 674 int
 675 rl_read_init_file (filename)
 676      char *filename;
 677 {
 678   /* Default the filename. */
 679   if (filename == 0)
 680     {
 681       filename = last_readline_init_file;
 682       if (filename == 0)
 683         filename = get_env_value ("INPUTRC");
 684       if (filename == 0)
 685         filename = DEFAULT_INPUTRC;
 686     }
 687
 688   if (*filename == 0)
 689     filename = DEFAULT_INPUTRC;
 690
 691 #if defined (__MSDOS__)
 692   if (_rl_read_init_file (filename, 0) == 0)
 693     return 0;
 694   filename = "~/_inputrc";
 695 #endif
 696   return (_rl_read_init_file (filename, 0));
 697 }
 698
 699 static int
 700 _rl_read_init_file (filename, include_level)
 701      char *filename;
 702      int include_level;
 703 {
 704   register int i;
 705   char *buffer, *openname, *line, *end;
 706   size_t file_size;
 707
 708   current_readline_init_file = filename;
 709   current_readline_init_include_level = include_level;
 710
 711   openname = tilde_expand (filename);
 712   buffer = _rl_read_file (openname, &file_size);
 713   free (openname);
 714
 715   if (buffer == 0)
 716     return (errno);
 717
 718   if (include_level == 0 && filename != last_readline_init_file)
 719     {
 720       FREE (last_readline_init_file);
 721       last_readline_init_file = savestring (filename);
 722     }
 723
 724   currently_reading_init_file = 1;
 725
 726   /* Loop over the lines in the file.  Lines that start with `#' are
 727      comments; all other lines are commands for readline initialization. */
 728   current_readline_init_lineno = 1;
 729   line = buffer;
 730   end = buffer + file_size;
 731   while (line < end)
 732     {
 733       /* Find the end of this line. */
 734       for (i = 0; line + i != end && line[i] != '\n'; i++);
 735
 736 #if defined (__CYGWIN32__)
 737       /* ``Be liberal in what you accept.'' */
 738       if (line[i] == '\n' && line[i-1] == '\r')
 739         line[i - 1] = '\0';
 740 #endif
 741
 742       /* Mark end of line. */
 743       line[i] = '\0';
 744
 745       /* Skip leading whitespace. */
 746       while (*line && whitespace (*line))
 747         {
 748           line++;
 749           i--;
 750         }
 751
 752       /* If the line is not a comment, then parse it. */
 753       if (*line && *line != '#')
 754         rl_parse_and_bind (line);
 755
 756       /* Move to the next line. */
 757       line += i + 1;
 758       current_readline_init_lineno++;
 759     }
 760
 761   free (buffer);
 762   currently_reading_init_file = 0;
 763   return (0);
 764 }
 765
 766 static void
 767 _rl_init_file_error (msg)
 768      char *msg;
 769 {
 770   if (currently_reading_init_file)
 771     fprintf (stderr, "readline: %s: line %d: %s\n", current_readline_init_file,
 772                      current_readline_init_lineno, msg);
 773   else
 774     fprintf (stderr, "readline: %s\n", msg);
 775 }
 776
 777 /* **************************************************************** */
 778 /*                                                                  */
 779 /*                      Parser Directives                           */
 780 /*                                                                  */
 781 /* **************************************************************** */
 782
 783 /* Conditionals. */
 784
 785 /* Calling programs set this to have their argv[0]. */
 786 char *rl_readline_name = "other";
 787
 788 /* Stack of previous values of parsing_conditionalized_out. */
 789 static unsigned char *if_stack = (unsigned char *)NULL;
 790 static int if_stack_depth;
 791 static int if_stack_size;
 792
 793 /* Push _rl_parsing_conditionalized_out, and set parser state based
 794    on ARGS. */
 795 static int
 796 parser_if (args)
 797      char *args;
 798 {
 799   register int i;
 800
 801   /* Push parser state. */
 802   if (if_stack_depth + 1 >= if_stack_size)
 803     {
 804       if (!if_stack)
 805         if_stack = (unsigned char *)xmalloc (if_stack_size = 20);
 806       else
 807         if_stack = (unsigned char *)xrealloc (if_stack, if_stack_size += 20);
 808     }
 809   if_stack[if_stack_depth++] = _rl_parsing_conditionalized_out;
 810
 811   /* If parsing is turned off, then nothing can turn it back on except
 812      for finding the matching endif.  In that case, return right now. */
 813   if (_rl_parsing_conditionalized_out)
 814     return 0;
 815
 816   /* Isolate first argument. */
 817   for (i = 0; args[i] && !whitespace (args[i]); i++);
 818
 819   if (args[i])
 820     args[i++] = '\0';
 821
 822   /* Handle "$if term=foo" and "$if mode=emacs" constructs.  If this
 823      isn't term=foo, or mode=emacs, then check to see if the first
 824      word in ARGS is the same as the value stored in rl_readline_name. */
 825   if (rl_terminal_name && _rl_strnicmp (args, "term=", 5) == 0)
 826     {
 827       char *tem, *tname;
 828
 829       /* Terminals like "aaa-60" are equivalent to "aaa". */
 830       tname = savestring (rl_terminal_name);
 831       tem = strchr (tname, '-');
 832       if (tem)
 833         *tem = '\0';
 834
 835       /* Test the `long' and `short' forms of the terminal name so that
 836          if someone has a `sun-cmd' and does not want to have bindings
 837          that will be executed if the terminal is a `sun', they can put
 838          `$if term=sun-cmd' into their .inputrc. */
 839       _rl_parsing_conditionalized_out = _rl_stricmp (args + 5, tname) &&
 840                                         _rl_stricmp (args + 5, rl_terminal_name);
 841       free (tname);
 842     }
 843 #if defined (VI_MODE)
 844   else if (_rl_strnicmp (args, "mode=", 5) == 0)
 845     {
 846       int mode;
 847
 848       if (_rl_stricmp (args + 5, "emacs") == 0)
 849         mode = emacs_mode;
 850       else if (_rl_stricmp (args + 5, "vi") == 0)
 851         mode = vi_mode;
 852       else
 853         mode = no_mode;
 854
 855       _rl_parsing_conditionalized_out = mode != rl_editing_mode;
 856     }
 857 #endif /* VI_MODE */
 858   /* Check to see if the first word in ARGS is the same as the
 859      value stored in rl_readline_name. */
 860   else if (_rl_stricmp (args, rl_readline_name) == 0)
 861     _rl_parsing_conditionalized_out = 0;
 862   else
 863     _rl_parsing_conditionalized_out = 1;
 864   return 0;
 865 }
 866
 867 /* Invert the current parser state if there is anything on the stack. */
 868 static int
 869 parser_else (args)
 870      char *args;
 871 {
 872   register int i;
 873
 874   if (if_stack_depth == 0)
 875     {
 876       _rl_init_file_error ("$else found without matching $if");
 877       return 0;
 878     }
 879
 880   /* Check the previous (n - 1) levels of the stack to make sure that
 881      we haven't previously turned off parsing. */
 882   for (i = 0; i < if_stack_depth - 1; i++)
 883     if (if_stack[i] == 1)
 884       return 0;
 885
 886   /* Invert the state of parsing if at top level. */
 887   _rl_parsing_conditionalized_out = !_rl_parsing_conditionalized_out;
 888   return 0;
 889 }
 890
 891 /* Terminate a conditional, popping the value of
 892    _rl_parsing_conditionalized_out from the stack. */
 893 static int
 894 parser_endif (args)
 895      char *args;
 896 {
 897   if (if_stack_depth)
 898     _rl_parsing_conditionalized_out = if_stack[--if_stack_depth];
 899   else
 900     _rl_init_file_error ("$endif without matching $if");
 901   return 0;
 902 }
 903
 904 static int
 905 parser_include (args)
 906      char *args;
 907 {
 908   char *old_init_file, *e;
 909   int old_line_number, old_include_level, r;
 910
 911   if (_rl_parsing_conditionalized_out)
 912     return (0);
 913
 914   old_init_file = current_readline_init_file;
 915   old_line_number = current_readline_init_lineno;
 916   old_include_level = current_readline_init_include_level;
 917
 918   e = strchr (args, '\n');
 919   if (e)
 920     *e = '\0';
 921   r = _rl_read_init_file (args, old_include_level + 1);
 922
 923   current_readline_init_file = old_init_file;
 924   current_readline_init_lineno = old_line_number;
 925   current_readline_init_include_level = old_include_level;
 926
 927   return r;
 928 }
 929
 930 /* Associate textual names with actual functions. */
 931 static struct {
 932   char *name;
 933   Function *function;
 934 } parser_directives [] = {
 935   { "if", parser_if },
 936   { "endif", parser_endif },
 937   { "else", parser_else },
 938   { "include", parser_include },
 939   { (char *)0x0, (Function *)0x0 }
 940 };
 941
 942 /* Handle a parser directive.  STATEMENT is the line of the directive
 943    without any leading `$'. */
 944 static int
 945 handle_parser_directive (statement)
 946      char *statement;
 947 {
 948   register int i;
 949   char *directive, *args;
 950
 951   /* Isolate the actual directive. */
 952
 953   /* Skip whitespace. */
 954   for (i = 0; whitespace (statement[i]); i++);
 955
 956   directive = &statement[i];
 957
 958   for (; statement[i] && !whitespace (statement[i]); i++);
 959
 960   if (statement[i])
 961     statement[i++] = '\0';
 962
 963   for (; statement[i] && whitespace (statement[i]); i++);
 964
 965   args = &statement[i];
 966
 967   /* Lookup the command, and act on it. */
 968   for (i = 0; parser_directives[i].name; i++)
 969     if (_rl_stricmp (directive, parser_directives[i].name) == 0)
 970       {
 971         (*parser_directives[i].function) (args);
 972         return (0);
 973       }
 974
 975   /* display an error message about the unknown parser directive */
 976   _rl_init_file_error ("unknown parser directive");
 977   return (1);
 978 }
 979
 980 /* Read the binding command from STRING and perform it.
 981    A key binding command looks like: Keyname: function-name\0,
 982    a variable binding command looks like: set variable value.
 983    A new-style keybinding looks like "\C-x\C-x": exchange-point-and-mark. */
 984 int
 985 rl_parse_and_bind (string)
 986      char *string;
 987 {
 988   char *funname, *kname;
 989   register int c, i;
 990   int key, equivalency;
 991
 992   while (string && whitespace (*string))
 993     string++;
 994
 995   if (!string || !*string || *string == '#')
 996     return 0;
 997
 998   /* If this is a parser directive, act on it. */
 999   if (*string == '$')
1000     {
1001       handle_parser_directive (&string[1]);
1002       return 0;
1003     }
1004
1005   /* If we aren't supposed to be parsing right now, then we're done. */
1006   if (_rl_parsing_conditionalized_out)
1007     return 0;
1008
1009   i = 0;
1010   /* If this keyname is a complex key expression surrounded by quotes,
1011      advance to after the matching close quote.  This code allows the
1012      backslash to quote characters in the key expression. */
1013   if (*string == '"')
1014     {
1015       int passc = 0;
1016
1017       for (i = 1; c = string[i]; i++)
1018         {
1019           if (passc)
1020             {
1021               passc = 0;
1022               continue;
1023             }
1024
1025           if (c == '\\')
1026             {
1027               passc++;
1028               continue;
1029             }
1030
1031           if (c == '"')
1032             break;
1033         }
1034       /* If we didn't find a closing quote, abort the line. */
1035       if (string[i] == '\0')
1036         {
1037           _rl_init_file_error ("no closing `\"' in key binding");
1038           return 1;
1039         }
1040     }
1041
1042   /* Advance to the colon (:) or whitespace which separates the two objects. */
1043   for (; (c = string[i]) && c != ':' && c != ' ' && c != '\t'; i++ );
1044
1045   equivalency = (c == ':' && string[i + 1] == '=');
1046
1047   /* Mark the end of the command (or keyname). */
1048   if (string[i])
1049     string[i++] = '\0';
1050
1051   /* If doing assignment, skip the '=' sign as well. */
1052   if (equivalency)
1053     string[i++] = '\0';
1054
1055   /* If this is a command to set a variable, then do that. */
1056   if (_rl_stricmp (string, "set") == 0)
1057     {
1058       char *var = string + i;
1059       char *value;
1060
1061       /* Make VAR point to start of variable name. */
1062       while (*var && whitespace (*var)) var++;
1063
1064       /* Make value point to start of value string. */
1065       value = var;
1066       while (*value && !whitespace (*value)) value++;
1067       if (*value)
1068         *value++ = '\0';
1069       while (*value && whitespace (*value)) value++;
1070
1071       rl_variable_bind (var, value);
1072       return 0;
1073     }
1074
1075   /* Skip any whitespace between keyname and funname. */
1076   for (; string[i] && whitespace (string[i]); i++);
1077   funname = &string[i];
1078
1079   /* Now isolate funname.
1080      For straight function names just look for whitespace, since
1081      that will signify the end of the string.  But this could be a
1082      macro definition.  In that case, the string is quoted, so skip
1083      to the matching delimiter.  We allow the backslash to quote the
1084      delimiter characters in the macro body. */
1085   /* This code exists to allow whitespace in macro expansions, which
1086      would otherwise be gobbled up by the next `for' loop.*/
1087   /* XXX - it may be desirable to allow backslash quoting only if " is
1088      the quoted string delimiter, like the shell. */
1089   if (*funname == '\'' || *funname == '"')
1090     {
1091       int delimiter = string[i++], passc;
1092
1093       for (passc = 0; c = string[i]; i++)
1094         {
1095           if (passc)
1096             {
1097               passc = 0;
1098               continue;
1099             }
1100
1101           if (c == '\\')
1102             {
1103               passc = 1;
1104               continue;
1105             }
1106
1107           if (c == delimiter)
1108             break;
1109         }
1110       if (c)
1111         i++;
1112     }
1113
1114   /* Advance to the end of the string.  */
1115   for (; string[i] && !whitespace (string[i]); i++);
1116
1117   /* No extra whitespace at the end of the string. */
1118   string[i] = '\0';
1119
1120   /* Handle equivalency bindings here.  Make the left-hand side be exactly
1121      whatever the right-hand evaluates to, including keymaps. */
1122   if (equivalency)
1123     {
1124       return 0;
1125     }
1126
1127   /* If this is a new-style key-binding, then do the binding with
1128      rl_set_key ().  Otherwise, let the older code deal with it. */
1129   if (*string == '"')
1130     {
1131       char *seq;
1132       register int j, k, passc;
1133
1134       seq = xmalloc (1 + strlen (string));
1135       for (j = 1, k = passc = 0; string[j]; j++)
1136         {
1137           /* Allow backslash to quote characters, but leave them in place.
1138              This allows a string to end with a backslash quoting another
1139              backslash, or with a backslash quoting a double quote.  The
1140              backslashes are left in place for rl_translate_keyseq (). */
1141           if (passc || (string[j] == '\\'))
1142             {
1143               seq[k++] = string[j];
1144               passc = !passc;
1145               continue;
1146             }
1147
1148           if (string[j] == '"')
1149             break;
1150
1151           seq[k++] = string[j];
1152         }
1153       seq[k] = '\0';
1154
1155       /* Binding macro? */
1156       if (*funname == '\'' || *funname == '"')
1157         {
1158           j = strlen (funname);
1159
1160           /* Remove the delimiting quotes from each end of FUNNAME. */
1161           if (j && funname[j - 1] == *funname)
1162             funname[j - 1] = '\0';
1163
1164           rl_macro_bind (seq, &funname[1], _rl_keymap);
1165         }
1166       else
1167         rl_set_key (seq, rl_named_function (funname), _rl_keymap);
1168
1169       free (seq);
1170       return 0;
1171     }
1172
1173   /* Get the actual character we want to deal with. */
1174   kname = strrchr (string, '-');
1175   if (!kname)
1176     kname = string;
1177   else
1178     kname++;
1179
1180   key = glean_key_from_name (kname);
1181
1182   /* Add in control and meta bits. */
1183   if (substring_member_of_array (string, possible_control_prefixes))
1184     key = CTRL (_rl_to_upper (key));
1185
1186   if (substring_member_of_array (string, possible_meta_prefixes))
1187     key = META (key);
1188
1189   /* Temporary.  Handle old-style keyname with macro-binding. */
1190   if (*funname == '\'' || *funname == '"')
1191     {
1192       unsigned char useq[2];
1193       int fl = strlen (funname);
1194
1195       useq[0] = key; useq[1] = '\0';
1196       if (fl && funname[fl - 1] == *funname)
1197         funname[fl - 1] = '\0';
1198
1199       rl_macro_bind (useq, &funname[1], _rl_keymap);
1200     }
1201 #if defined (PREFIX_META_HACK)
1202   /* Ugly, but working hack to keep prefix-meta around. */
1203   else if (_rl_stricmp (funname, "prefix-meta") == 0)
1204     {
1205       char seq[2];
1206
1207       seq[0] = key;
1208       seq[1] = '\0';
1209       rl_generic_bind (ISKMAP, seq, (char *)emacs_meta_keymap, _rl_keymap);
1210     }
1211 #endif /* PREFIX_META_HACK */
1212   else
1213     rl_bind_key (key, rl_named_function (funname));
1214   return 0;
1215 }
1216
1217 /* Simple structure for boolean readline variables (i.e., those that can
1218    have one of two values; either "On" or 1 for truth, or "Off" or 0 for
1219    false. */
1220
1221 #define V_SPECIAL       0x1
1222
1223 static struct {
1224   char *name;
1225   int *value;
1226   int flags;
1227 } boolean_varlist [] = {
1228   { "blink-matching-paren",     &rl_blink_matching_paren,       V_SPECIAL },
1229   { "completion-ignore-case",   &_rl_completion_case_fold,      0 },
1230   { "convert-meta",             &_rl_convert_meta_chars_to_ascii, 0 },
1231   { "disable-completion",       &rl_inhibit_completion,         0 },
1232   { "enable-keypad",            &_rl_enable_keypad,             0 },
1233   { "expand-tilde",             &rl_complete_with_tilde_expansion, 0 },
1234   { "horizontal-scroll-mode",   &_rl_horizontal_scroll_mode,    0 },
1235   { "input-meta",               &_rl_meta_flag,                 0 },
1236   { "mark-directories",         &_rl_complete_mark_directories, 0 },
1237   { "mark-modified-lines",      &_rl_mark_modified_lines,       0 },
1238   { "meta-flag",                &_rl_meta_flag,                 0 },
1239   { "output-meta",              &_rl_output_meta_chars,         0 },
1240   { "prefer-visible-bell",      &_rl_prefer_visible_bell,       V_SPECIAL },
1241   { "print-completions-horizontally", &_rl_print_completions_horizontally, 0 },
1242   { "show-all-if-ambiguous",    &_rl_complete_show_all,         0 },
1243 #if defined (VISIBLE_STATS)
1244   { "visible-stats",            &rl_visible_stats,              0 },
1245 #endif /* VISIBLE_STATS */
1246   { (char *)NULL, (int *)NULL }
1247 };
1248
1249 static int
1250 find_boolean_var (name)
1251      char *name;
1252 {
1253   register int i;
1254
1255   for (i = 0; boolean_varlist[i].name; i++)
1256     if (_rl_stricmp (name, boolean_varlist[i].name) == 0)
1257       return i;
1258   return -1;
1259 }
1260
1261 /* Hooks for handling special boolean variables, where a
1262    function needs to be called or another variable needs
1263    to be changed when they're changed. */
1264 static void
1265 hack_special_boolean_var (i)
1266      int i;
1267 {
1268   char *name;
1269
1270   name = boolean_varlist[i].name;
1271
1272   if (_rl_stricmp (name, "blink-matching-paren") == 0)
1273     _rl_enable_paren_matching (rl_blink_matching_paren);
1274   else if (_rl_stricmp (name, "prefer-visible-bell") == 0)
1275     {
1276       if (_rl_prefer_visible_bell)
1277         _rl_bell_preference = VISIBLE_BELL;
1278       else
1279         _rl_bell_preference = AUDIBLE_BELL;
1280     }
1281 }
1282
1283 /* These *must* correspond to the array indices for the appropriate
1284    string variable.  (Though they're not used right now.) */
1285 #define V_BELLSTYLE     0
1286 #define V_COMBEGIN      1
1287 #define V_EDITMODE      2
1288 #define V_ISRCHTERM     3
1289 #define V_KEYMAP        4
1290
1291 #define V_STRING        1
1292 #define V_INT           2
1293
1294 /* Forward declarations */
1295 static int sv_bell_style __P((char *));
1296 static int sv_combegin __P((char *));
1297 static int sv_compquery __P((char *));
1298 static int sv_editmode __P((char *));
1299 static int sv_isrchterm __P((char *));
1300 static int sv_keymap __P((char *));
1301
1302 static struct {
1303   char *name;
1304   int flags;
1305   Function *set_func;
1306 } string_varlist[] = {
1307   { "bell-style",       V_STRING,       sv_bell_style },
1308   { "comment-begin",    V_STRING,       sv_combegin },
1309   { "completion-query-items", V_INT,    sv_compquery },
1310   { "editing-mode",     V_STRING,       sv_editmode },
1311   { "isearch-terminators", V_STRING,    sv_isrchterm },
1312   { "keymap",           V_STRING,       sv_keymap },
1313   { (char *)NULL,       0 }
1314 };
1315
1316 static int
1317 find_string_var (name)
1318      char *name;
1319 {
1320   register int i;
1321
1322   for (i = 0; string_varlist[i].name; i++)
1323     if (_rl_stricmp (name, string_varlist[i].name) == 0)
1324       return i;
1325   return -1;
1326 }
1327
1328 /* A boolean value that can appear in a `set variable' command is true if
1329    the value is null or empty, `on' (case-insenstive), or "1".  Any other
1330    values result in 0 (false). */
1331 static int
1332 bool_to_int (value)
1333      char *value;
1334 {
1335   return (value == 0 || *value == '\0' ||
1336                 (_rl_stricmp (value, "on") == 0) ||
1337                 (value[0] == '1' && value[1] == '\0'));
1338 }
1339
1340 int
1341 rl_variable_bind (name, value)
1342      char *name, *value;
1343 {
1344   register int i;
1345   int   v;
1346
1347   /* Check for simple variables first. */
1348   i = find_boolean_var (name);
1349   if (i >= 0)
1350     {
1351       *boolean_varlist[i].value = bool_to_int (value);
1352       if (boolean_varlist[i].flags & V_SPECIAL)
1353         hack_special_boolean_var (i);
1354       return 0;
1355     }
1356
1357   i = find_string_var (name);
1358
1359   /* For the time being, unknown variable names or string names without a
1360      handler function are simply ignored. */
1361   if (i < 0 || string_varlist[i].set_func == 0)
1362     return 0;
1363
1364   v = (*string_varlist[i].set_func) (value);
1365   return v;
1366 }
1367
1368 static int
1369 sv_editmode (value)
1370      char *value;
1371 {
1372   if (_rl_strnicmp (value, "vi", 2) == 0)
1373     {
1374 #if defined (VI_MODE)
1375       _rl_keymap = vi_insertion_keymap;
1376       rl_editing_mode = vi_mode;
1377 #endif /* VI_MODE */
1378       return 0;
1379     }
1380   else if (_rl_strnicmp (value, "emacs", 5) == 0)
1381     {
1382       _rl_keymap = emacs_standard_keymap;
1383       rl_editing_mode = emacs_mode;
1384       return 0;
1385     }
1386   return 1;
1387 }
1388
1389 static int
1390 sv_combegin (value)
1391      char *value;
1392 {
1393   if (value && *value)
1394     {
1395       FREE (_rl_comment_begin);
1396       _rl_comment_begin = savestring (value);
1397       return 0;
1398     }
1399   return 1;
1400 }
1401
1402 static int
1403 sv_compquery (value)
1404      char *value;
1405 {
1406   int nval = 100;
1407
1408   if (value && *value)
1409     {
1410       nval = atoi (value);
1411       if (nval < 0)
1412         nval = 0;
1413     }
1414   rl_completion_query_items = nval;
1415   return 0;
1416 }
1417
1418 static int
1419 sv_keymap (value)
1420      char *value;
1421 {
1422   Keymap kmap;
1423
1424   kmap = rl_get_keymap_by_name (value);
1425   if (kmap)
1426     {
1427       rl_set_keymap (kmap);
1428       return 0;
1429     }
1430   return 1;
1431 }
1432
1433 #define _SET_BELL(v)    do { _rl_bell_preference = v; return 0; } while (0)
1434
1435 static int
1436 sv_bell_style (value)
1437      char *value;
1438 {
1439   if (value == 0 || *value == '\0')
1440     _SET_BELL (AUDIBLE_BELL);
1441   else if (_rl_stricmp (value, "none") == 0 || _rl_stricmp (value, "off") == 0)
1442     _SET_BELL (NO_BELL);
1443   else if (_rl_stricmp (value, "audible") == 0 || _rl_stricmp (value, "on") == 0)
1444     _SET_BELL (AUDIBLE_BELL);
1445   else if (_rl_stricmp (value, "visible") == 0)
1446     _SET_BELL (VISIBLE_BELL);
1447   else
1448     return 1;
1449 }
1450 #undef _SET_BELL
1451
1452 static int
1453 sv_isrchterm (value)
1454      char *value;
1455 {
1456   int beg, end, delim;
1457   char *v;
1458
1459   if (value == 0)
1460     return 1;
1461
1462   /* Isolate the value and translate it into a character string. */
1463   v = savestring (value);
1464   FREE (_rl_isearch_terminators);
1465   if (v[0] == '"' || v[0] == '\'')
1466     {
1467       delim = v[0];
1468       for (beg = end = 1; v[end] && v[end] != delim; end++)
1469         ;
1470     }
1471   else
1472     {
1473       for (beg = end = 0; whitespace (v[end]) == 0; end++)
1474         ;
1475     }
1476
1477   v[end] = '\0';
1478
1479   /* The value starts at v + beg.  Translate it into a character string. */
1480   _rl_isearch_terminators = (unsigned char *)xmalloc (2 * strlen (v) + 1);
1481   rl_translate_keyseq (v + beg, _rl_isearch_terminators, &end);
1482   _rl_isearch_terminators[end] = '\0';
1483
1484   free (v);
1485   return 0;
1486 }
1487
1488 /* Return the character which matches NAME.
1489    For example, `Space' returns ' '. */
1490
1491 typedef struct {
1492   char *name;
1493   int value;
1494 } assoc_list;
1495
1496 static assoc_list name_key_alist[] = {
1497   { "DEL", 0x7f },
1498   { "ESC", '\033' },
1499   { "Escape", '\033' },
1500   { "LFD", '\n' },
1501   { "Newline", '\n' },
1502   { "RET", '\r' },
1503   { "Return", '\r' },
1504   { "Rubout", 0x7f },
1505   { "SPC", ' ' },
1506   { "Space", ' ' },
1507   { "Tab", 0x09 },
1508   { (char *)0x0, 0 }
1509 };
1510
1511 static int
1512 glean_key_from_name (name)
1513      char *name;
1514 {
1515   register int i;
1516
1517   for (i = 0; name_key_alist[i].name; i++)
1518     if (_rl_stricmp (name, name_key_alist[i].name) == 0)
1519       return (name_key_alist[i].value);
1520
1521   return (*(unsigned char *)name);      /* XXX was return (*name) */
1522 }
1523
1524 /* Auxiliary functions to manage keymaps. */
1525 static struct {
1526   char *name;
1527   Keymap map;
1528 } keymap_names[] = {
1529   { "emacs", emacs_standard_keymap },
1530   { "emacs-standard", emacs_standard_keymap },
1531   { "emacs-meta", emacs_meta_keymap },
1532   { "emacs-ctlx", emacs_ctlx_keymap },
1533 #if defined (VI_MODE)
1534   { "vi", vi_movement_keymap },
1535   { "vi-move", vi_movement_keymap },
1536   { "vi-command", vi_movement_keymap },
1537   { "vi-insert", vi_insertion_keymap },
1538 #endif /* VI_MODE */
1539   { (char *)0x0, (Keymap)0x0 }
1540 };
1541
1542 Keymap
1543 rl_get_keymap_by_name (name)
1544      char *name;
1545 {
1546   register int i;
1547
1548   for (i = 0; keymap_names[i].name; i++)
1549     if (strcmp (name, keymap_names[i].name) == 0)
1550       return (keymap_names[i].map);
1551   return ((Keymap) NULL);
1552 }
1553
1554 char *
1555 rl_get_keymap_name (map)
1556      Keymap map;
1557 {
1558   register int i;
1559   for (i = 0; keymap_names[i].name; i++)
1560     if (map == keymap_names[i].map)
1561       return (keymap_names[i].name);
1562   return ((char *)NULL);
1563 }
1564
1565 void
1566 rl_set_keymap (map)
1567      Keymap map;
1568 {
1569   if (map)
1570     _rl_keymap = map;
1571 }
1572
1573 Keymap
1574 rl_get_keymap ()
1575 {
1576   return (_rl_keymap);
1577 }
1578
1579 void
1580 rl_set_keymap_from_edit_mode ()
1581 {
1582   if (rl_editing_mode == emacs_mode)
1583     _rl_keymap = emacs_standard_keymap;
1584 #if defined (VI_MODE)
1585   else if (rl_editing_mode == vi_mode)
1586     _rl_keymap = vi_insertion_keymap;
1587 #endif /* VI_MODE */
1588 }
1589
1590 char *
1591 rl_get_keymap_name_from_edit_mode ()
1592 {
1593   if (rl_editing_mode == emacs_mode)
1594     return "emacs";
1595 #if defined (VI_MODE)
1596   else if (rl_editing_mode == vi_mode)
1597     return "vi";
1598 #endif /* VI_MODE */
1599   else
1600     return "none";
1601 }
1602
1603 /* **************************************************************** */
1604 /*                                                                  */
1605 /*                Key Binding and Function Information              */
1606 /*                                                                  */
1607 /* **************************************************************** */
1608
1609 /* Each of the following functions produces information about the
1610    state of keybindings and functions known to Readline.  The info
1611    is always printed to rl_outstream, and in such a way that it can
1612    be read back in (i.e., passed to rl_parse_and_bind (). */
1613
1614 /* Print the names of functions known to Readline. */
1615 void
1616 rl_list_funmap_names ()
1617 {
1618   register int i;
1619   char **funmap_names;
1620
1621   funmap_names = rl_funmap_names ();
1622
1623   if (!funmap_names)
1624     return;
1625
1626   for (i = 0; funmap_names[i]; i++)
1627     fprintf (rl_outstream, "%s\n", funmap_names[i]);
1628
1629   free (funmap_names);
1630 }
1631
1632 static char *
1633 _rl_get_keyname (key)
1634      int key;
1635 {
1636   char *keyname;
1637   int i, c;
1638
1639   keyname = (char *)xmalloc (8);
1640
1641   c = key;
1642   /* Since this is going to be used to write out keysequence-function
1643      pairs for possible inclusion in an inputrc file, we don't want to
1644      do any special meta processing on KEY. */
1645
1646 #if 0
1647   /* We might want to do this, but the old version of the code did not. */
1648
1649   /* If this is an escape character, we don't want to do any more processing.
1650      Just add the special ESC key sequence and return. */
1651   if (c == ESC)
1652     {
1653       keyseq[0] = '\\';
1654       keyseq[1] = 'e';
1655       keyseq[2] = '\0';
1656       return keyseq;
1657     }
1658 #endif
1659
1660   /* RUBOUT is translated directly into \C-? */
1661   if (key == RUBOUT)
1662     {
1663       keyname[0] = '\\';
1664       keyname[1] = 'C';
1665       keyname[2] = '-';
1666       keyname[3] = '?';
1667       keyname[4] = '\0';
1668       return keyname;
1669     }
1670
1671   i = 0;
1672   /* Now add special prefixes needed for control characters.  This can
1673      potentially change C. */
1674   if (CTRL_CHAR (c))
1675     {
1676       keyname[i++] = '\\';
1677       keyname[i++] = 'C';
1678       keyname[i++] = '-';
1679       c = _rl_to_lower (UNCTRL (c));
1680     }
1681
1682   /* XXX experimental code.  Turn the characters that are not ASCII or
1683      ISO Latin 1 (128 - 159) into octal escape sequences (\200 - \237).
1684      This changes C. */
1685   if (c >= 128 && c <= 159)
1686     {
1687       keyname[i++] = '\\';
1688       keyname[i++] = '2';
1689       c -= 128;
1690       keyname[i++] = (c / 8) + '0';
1691       c = (c % 8) + '0';
1692     }
1693
1694   /* Now, if the character needs to be quoted with a backslash, do that. */
1695   if (c == '\\' || c == '"')
1696     keyname[i++] = '\\';
1697
1698   /* Now add the key, terminate the string, and return it. */
1699   keyname[i++] = (char) c;
1700   keyname[i] = '\0';
1701
1702   return keyname;
1703 }
1704
1705 /* Return a NULL terminated array of strings which represent the key
1706    sequences that are used to invoke FUNCTION in MAP. */
1707 char **
1708 rl_invoking_keyseqs_in_map (function, map)
1709      Function *function;
1710      Keymap map;
1711 {
1712   register int key;
1713   char **result;
1714   int result_index, result_size;
1715
1716   result = (char **)NULL;
1717   result_index = result_size = 0;
1718
1719   for (key = 0; key < KEYMAP_SIZE; key++)
1720     {
1721       switch (map[key].type)
1722         {
1723         case ISMACR:
1724           /* Macros match, if, and only if, the pointers are identical.
1725              Thus, they are treated exactly like functions in here. */
1726         case ISFUNC:
1727           /* If the function in the keymap is the one we are looking for,
1728              then add the current KEY to the list of invoking keys. */
1729           if (map[key].function == function)
1730             {
1731               char *keyname;
1732
1733               keyname = _rl_get_keyname (key);
1734
1735               if (result_index + 2 > result_size)
1736                 {
1737                   result_size += 10;
1738                   result = (char **) xrealloc (result, result_size * sizeof (char *));
1739                 }
1740
1741               result[result_index++] = keyname;
1742               result[result_index] = (char *)NULL;
1743             }
1744           break;
1745
1746         case ISKMAP:
1747           {
1748             char **seqs;
1749             register int i;
1750
1751             /* Find the list of keyseqs in this map which have FUNCTION as
1752                their target.  Add the key sequences found to RESULT. */
1753             if (map[key].function)
1754               seqs =
1755                 rl_invoking_keyseqs_in_map (function, FUNCTION_TO_KEYMAP (map, key));
1756             else
1757               break;
1758
1759             if (seqs == 0)
1760               break;
1761
1762             for (i = 0; seqs[i]; i++)
1763               {
1764                 char *keyname = (char *)xmalloc (6 + strlen (seqs[i]));
1765
1766                 if (key == ESC)
1767                   sprintf (keyname, "\\e");
1768                 else if (CTRL_CHAR (key))
1769                   sprintf (keyname, "\\C-%c", _rl_to_lower (UNCTRL (key)));
1770                 else if (key == RUBOUT)
1771                   sprintf (keyname, "\\C-?");
1772                 else if (key == '\\' || key == '"')
1773                   {
1774                     keyname[0] = '\\';
1775                     keyname[1] = (char) key;
1776                     keyname[2] = '\0';
1777                   }
1778                 else
1779                   {
1780                     keyname[0] = (char) key;
1781                     keyname[1] = '\0';
1782                   }
1783
1784                 strcat (keyname, seqs[i]);
1785                 free (seqs[i]);
1786
1787                 if (result_index + 2 > result_size)
1788                   {
1789                     result_size += 10;
1790                     result = (char **) xrealloc (result, result_size * sizeof (char *));
1791                   }
1792
1793                 result[result_index++] = keyname;
1794                 result[result_index] = (char *)NULL;
1795               }
1796
1797             free (seqs);
1798           }
1799           break;
1800         }
1801     }
1802   return (result);
1803 }
1804
1805 /* Return a NULL terminated array of strings which represent the key
1806    sequences that can be used to invoke FUNCTION using the current keymap. */
1807 char **
1808 rl_invoking_keyseqs (function)
1809      Function *function;
1810 {
1811   return (rl_invoking_keyseqs_in_map (function, _rl_keymap));
1812 }
1813
1814 /* Print all of the functions and their bindings to rl_outstream.  If
1815    PRINT_READABLY is non-zero, then print the output in such a way
1816    that it can be read back in. */
1817 void
1818 rl_function_dumper (print_readably)
1819      int print_readably;
1820 {
1821   register int i;
1822   char **names;
1823   char *name;
1824
1825   names = rl_funmap_names ();
1826
1827   fprintf (rl_outstream, "\n");
1828
1829   for (i = 0; name = names[i]; i++)
1830     {
1831       Function *function;
1832       char **invokers;
1833
1834       function = rl_named_function (name);
1835       invokers = rl_invoking_keyseqs_in_map (function, _rl_keymap);
1836
1837       if (print_readably)
1838         {
1839           if (!invokers)
1840             fprintf (rl_outstream, "# %s (not bound)\n", name);
1841           else
1842             {
1843               register int j;
1844
1845               for (j = 0; invokers[j]; j++)
1846                 {
1847                   fprintf (rl_outstream, "\"%s\": %s\n",
1848                            invokers[j], name);
1849                   free (invokers[j]);
1850                 }
1851
1852               free (invokers);
1853             }
1854         }
1855       else
1856         {
1857           if (!invokers)
1858             fprintf (rl_outstream, "%s is not bound to any keys\n",
1859                      name);
1860           else
1861             {
1862               register int j;
1863
1864               fprintf (rl_outstream, "%s can be found on ", name);
1865
1866               for (j = 0; invokers[j] && j < 5; j++)
1867                 {
1868                   fprintf (rl_outstream, "\"%s\"%s", invokers[j],
1869                            invokers[j + 1] ? ", " : ".\n");
1870                 }
1871
1872               if (j == 5 && invokers[j])
1873                 fprintf (rl_outstream, "...\n");
1874
1875               for (j = 0; invokers[j]; j++)
1876                 free (invokers[j]);
1877
1878               free (invokers);
1879             }
1880         }
1881     }
1882 }
1883
1884 /* Print all of the current functions and their bindings to
1885    rl_outstream.  If an explicit argument is given, then print
1886    the output in such a way that it can be read back in. */
1887 int
1888 rl_dump_functions (count, key)
1889      int count, key;
1890 {
1891   if (rl_dispatching)
1892     fprintf (rl_outstream, "\r\n");
1893   rl_function_dumper (rl_explicit_arg);
1894   rl_on_new_line ();
1895   return (0);
1896 }
1897
1898 static void
1899 _rl_macro_dumper_internal (print_readably, map, prefix)
1900      int print_readably;
1901      Keymap map;
1902      char *prefix;
1903 {
1904   register int key;
1905   char *keyname, *out;
1906   int prefix_len;
1907
1908   for (key = 0; key < KEYMAP_SIZE; key++)
1909     {
1910       switch (map[key].type)
1911         {
1912         case ISMACR:
1913           keyname = _rl_get_keyname (key);
1914 #if 0
1915           out = (char *)map[key].function;
1916 #else
1917           out = _rl_untranslate_macro_value ((char *)map[key].function);
1918 #endif
1919           if (print_readably)
1920             fprintf (rl_outstream, "\"%s%s\": \"%s\"\n", prefix ? prefix : "",
1921                                                          keyname,
1922                                                          out ? out : "");
1923           else
1924             fprintf (rl_outstream, "%s%s outputs %s\n", prefix ? prefix : "",
1925                                                         keyname,
1926                                                         out ? out : "");
1927           free (keyname);
1928 #if 1
1929           free (out);
1930 #endif
1931           break;
1932         case ISFUNC:
1933           break;
1934         case ISKMAP:
1935           prefix_len = prefix ? strlen (prefix) : 0;
1936           if (key == ESC)
1937             {
1938               keyname = xmalloc (3 + prefix_len);
1939               if (prefix)
1940                 strcpy (keyname, prefix);
1941               keyname[prefix_len] = '\\';
1942               keyname[prefix_len + 1] = 'e';
1943               keyname[prefix_len + 2] = '\0';
1944             }
1945           else
1946             {
1947               keyname = _rl_get_keyname (key);
1948               if (prefix)
1949                 {
1950                   out = xmalloc (strlen (keyname) + prefix_len + 1);
1951                   strcpy (out, prefix);
1952                   strcpy (out + prefix_len, keyname);
1953                   free (keyname);
1954                   keyname = out;
1955                 }
1956             }
1957
1958           _rl_macro_dumper_internal (print_readably, FUNCTION_TO_KEYMAP (map, key), keyname);
1959           free (keyname);
1960           break;
1961         }
1962     }
1963 }
1964
1965 void
1966 rl_macro_dumper (print_readably)
1967      int print_readably;
1968 {
1969   _rl_macro_dumper_internal (print_readably, _rl_keymap, (char *)NULL);
1970 }
1971
1972 int
1973 rl_dump_macros (count, key)
1974      int count, key;
1975 {
1976   if (rl_dispatching)
1977     fprintf (rl_outstream, "\r\n");
1978   rl_macro_dumper (rl_explicit_arg);
1979   rl_on_new_line ();
1980   return (0);
1981 }
1982
1983 void
1984 rl_variable_dumper (print_readably)
1985      int print_readably;
1986 {
1987   int i;
1988   char *kname;
1989
1990   for (i = 0; boolean_varlist[i].name; i++)
1991     {
1992       if (print_readably)
1993         fprintf (rl_outstream, "set %s %s\n", boolean_varlist[i].name,
1994                                *boolean_varlist[i].value ? "on" : "off");
1995       else
1996         fprintf (rl_outstream, "%s is set to `%s'\n", boolean_varlist[i].name,
1997                                *boolean_varlist[i].value ? "on" : "off");
1998     }
1999
2000   /* bell-style */
2001   switch (_rl_bell_preference)
2002     {
2003     case NO_BELL:
2004       kname = "none"; break;
2005     case VISIBLE_BELL:
2006       kname = "visible"; break;
2007     case AUDIBLE_BELL:
2008     default:
2009       kname = "audible"; break;
2010     }
2011   if (print_readably)
2012     fprintf (rl_outstream, "set bell-style %s\n", kname);
2013   else
2014     fprintf (rl_outstream, "bell-style is set to `%s'\n", kname);
2015
2016   /* comment-begin */
2017   if (print_readably)
2018     fprintf (rl_outstream, "set comment-begin %s\n", _rl_comment_begin ? _rl_comment_begin : RL_COMMENT_BEGIN_DEFAULT);
2019   else
2020     fprintf (rl_outstream, "comment-begin is set to `%s'\n", _rl_comment_begin ? _rl_comment_begin : "");
2021
2022   /* completion-query-items */
2023   if (print_readably)
2024     fprintf (rl_outstream, "set completion-query-items %d\n", rl_completion_query_items);
2025   else
2026     fprintf (rl_outstream, "completion-query-items is set to `%d'\n", rl_completion_query_items);
2027
2028   /* editing-mode */
2029   if (print_readably)
2030     fprintf (rl_outstream, "set editing-mode %s\n", (rl_editing_mode == emacs_mode) ? "emacs" : "vi");
2031   else
2032     fprintf (rl_outstream, "editing-mode is set to `%s'\n", (rl_editing_mode == emacs_mode) ? "emacs" : "vi");
2033
2034   /* keymap */
2035   kname = rl_get_keymap_name (_rl_keymap);
2036   if (kname == 0)
2037     kname = rl_get_keymap_name_from_edit_mode ();
2038   if (print_readably)
2039     fprintf (rl_outstream, "set keymap %s\n", kname ? kname : "none");
2040   else
2041     fprintf (rl_outstream, "keymap is set to `%s'\n", kname ? kname : "none");
2042
2043   /* isearch-terminators */
2044   if (_rl_isearch_terminators)
2045     {
2046       char *disp;
2047
2048       disp = _rl_untranslate_macro_value (_rl_isearch_terminators);
2049
2050       if (print_readably)
2051         fprintf (rl_outstream, "set isearch-terminators \"%s\"\n", disp);
2052       else
2053         fprintf (rl_outstream, "isearch-terminators is set to \"%s\"\n", disp);
2054
2055       free (disp);
2056     }
2057 }
2058
2059 /* Print all of the current variables and their values to
2060    rl_outstream.  If an explicit argument is given, then print
2061    the output in such a way that it can be read back in. */
2062 int
2063 rl_dump_variables (count, key)
2064      int count, key;
2065 {
2066   if (rl_dispatching)
2067     fprintf (rl_outstream, "\r\n");
2068   rl_variable_dumper (rl_explicit_arg);
2069   rl_on_new_line ();
2070   return (0);
2071 }
2072
2073 /* Bind key sequence KEYSEQ to DEFAULT_FUNC if KEYSEQ is unbound. */
2074 void
2075 _rl_bind_if_unbound (keyseq, default_func)
2076      char *keyseq;
2077      Function *default_func;
2078 {
2079   Function *func;
2080
2081   if (keyseq)
2082     {
2083       func = rl_function_of_keyseq (keyseq, _rl_keymap, (int *)NULL);
2084       if (!func || func == rl_do_lowercase_version)
2085         rl_set_key (keyseq, default_func, _rl_keymap);
2086     }
2087 }
2088
2089 /* Return non-zero if any members of ARRAY are a substring in STRING. */
2090 static int
2091 substring_member_of_array (string, array)
2092      char *string, **array;
2093 {
2094   while (*array)
2095     {
2096       if (_rl_strindex (string, *array))
2097         return (1);
2098       array++;
2099     }
2100   return (0);
2101 }