| 1 | /* complete.c -- filename completion for readline. */ |
| 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 1, 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 | 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 22 | #define READLINE_LIBRARY |
| 23 | |
| 24 | #if defined (HAVE_CONFIG_H) |
| 25 | # include <config.h> |
| 26 | #endif |
| 27 | |
| 28 | #include <sys/types.h> |
| 29 | #include <fcntl.h> |
| 30 | #if defined (HAVE_SYS_FILE_H) |
| 31 | #include <sys/file.h> |
| 32 | #endif |
| 33 | |
| 34 | #if defined (HAVE_UNISTD_H) |
| 35 | # include <unistd.h> |
| 36 | #endif /* HAVE_UNISTD_H */ |
| 37 | |
| 38 | #if defined (HAVE_STDLIB_H) |
| 39 | # include <stdlib.h> |
| 40 | #else |
| 41 | # include "ansi_stdlib.h" |
| 42 | #endif /* HAVE_STDLIB_H */ |
| 43 | |
| 44 | #include <stdio.h> |
| 45 | |
| 46 | #include <errno.h> |
| 47 | #if !defined (errno) |
| 48 | extern int errno; |
| 49 | #endif /* !errno */ |
| 50 | |
| 51 | #include <pwd.h> |
| 52 | #if !defined (HAVE_GETPW_DECLS) |
| 53 | extern struct passwd *getpwent (); |
| 54 | #endif /* USG && !HAVE_GETPW_DECLS */ |
| 55 | |
| 56 | /* ISC systems don't define getpwent() if _POSIX_SOURCE is defined. */ |
| 57 | #if defined (isc386) && defined (_POSIX_SOURCE) |
| 58 | # if defined (__STDC__) |
| 59 | extern struct passwd *getpwent (void); |
| 60 | # else |
| 61 | extern struct passwd *getpwent (); |
| 62 | # endif /* !__STDC__ */ |
| 63 | #endif /* isc386 && _POSIX_SOURCE */ |
| 64 | |
| 65 | #include "posixdir.h" |
| 66 | #include "posixstat.h" |
| 67 | |
| 68 | /* System-specific feature definitions and include files. */ |
| 69 | #include "rldefs.h" |
| 70 | |
| 71 | /* Some standard library routines. */ |
| 72 | #include "readline.h" |
| 73 | |
| 74 | extern char *tilde_expand (); |
| 75 | extern char *rl_copy_text (); |
| 76 | extern void _rl_abort_internal (); |
| 77 | extern int _rl_qsort_string_compare (); |
| 78 | extern void _rl_replace_text (); |
| 79 | |
| 80 | extern Function *rl_last_func; |
| 81 | extern int rl_editing_mode; |
| 82 | extern int screenwidth; |
| 83 | |
| 84 | extern void _rl_move_vert (); |
| 85 | extern int _rl_vis_botlin; |
| 86 | extern int rl_display_fixed; |
| 87 | |
| 88 | /* Forward declarations for functions defined and used in this file. */ |
| 89 | char *filename_completion_function (); |
| 90 | char **completion_matches (); |
| 91 | |
| 92 | #if defined (VISIBLE_STATS) |
| 93 | # if !defined (X_OK) |
| 94 | # define X_OK 1 |
| 95 | # endif |
| 96 | static int stat_char (); |
| 97 | #endif |
| 98 | |
| 99 | static char *rl_quote_filename (); |
| 100 | static char *rl_strpbrk (); |
| 101 | |
| 102 | static char **remove_duplicate_matches (); |
| 103 | static void insert_match (); |
| 104 | static int append_to_match (); |
| 105 | static void insert_all_matches (); |
| 106 | static void display_matches (); |
| 107 | static int compute_lcd_of_matches (); |
| 108 | |
| 109 | extern char *xmalloc (), *xrealloc (); |
| 110 | |
| 111 | /* **************************************************************** */ |
| 112 | /* */ |
| 113 | /* Completion matching, from readline's point of view. */ |
| 114 | /* */ |
| 115 | /* **************************************************************** */ |
| 116 | |
| 117 | /* Variables known only to the readline library. */ |
| 118 | |
| 119 | /* If non-zero, non-unique completions always show the list of matches. */ |
| 120 | int _rl_complete_show_all = 0; |
| 121 | |
| 122 | /* If non-zero, completed directory names have a slash appended. */ |
| 123 | int _rl_complete_mark_directories = 1; |
| 124 | |
| 125 | /* If non-zero, completions are printed horizontally in alphabetical order, |
| 126 | like `ls -x'. */ |
| 127 | int _rl_print_completions_horizontally; |
| 128 | |
| 129 | /* Non-zero means that case is not significant in filename completion. */ |
| 130 | int _rl_completion_case_fold; |
| 131 | |
| 132 | /* Global variables available to applications using readline. */ |
| 133 | |
| 134 | #if defined (VISIBLE_STATS) |
| 135 | /* Non-zero means add an additional character to each filename displayed |
| 136 | during listing completion iff rl_filename_completion_desired which helps |
| 137 | to indicate the type of file being listed. */ |
| 138 | int rl_visible_stats = 0; |
| 139 | #endif /* VISIBLE_STATS */ |
| 140 | |
| 141 | /* If non-zero, then this is the address of a function to call when |
| 142 | completing on a directory name. The function is called with |
| 143 | the address of a string (the current directory name) as an arg. */ |
| 144 | Function *rl_directory_completion_hook = (Function *)NULL; |
| 145 | |
| 146 | /* Non-zero means readline completion functions perform tilde expansion. */ |
| 147 | int rl_complete_with_tilde_expansion = 0; |
| 148 | |
| 149 | /* Pointer to the generator function for completion_matches (). |
| 150 | NULL means to use filename_completion_function (), the default filename |
| 151 | completer. */ |
| 152 | Function *rl_completion_entry_function = (Function *)NULL; |
| 153 | |
| 154 | /* Pointer to alternative function to create matches. |
| 155 | Function is called with TEXT, START, and END. |
| 156 | START and END are indices in RL_LINE_BUFFER saying what the boundaries |
| 157 | of TEXT are. |
| 158 | If this function exists and returns NULL then call the value of |
| 159 | rl_completion_entry_function to try to match, otherwise use the |
| 160 | array of strings returned. */ |
| 161 | CPPFunction *rl_attempted_completion_function = (CPPFunction *)NULL; |
| 162 | |
| 163 | /* Non-zero means to suppress normal filename completion after the |
| 164 | user-specified completion function has been called. */ |
| 165 | int rl_attempted_completion_over = 0; |
| 166 | |
| 167 | /* Set to a character indicating the type of completion being performed |
| 168 | by rl_complete_internal, available for use by application completion |
| 169 | functions. */ |
| 170 | int rl_completion_type = 0; |
| 171 | |
| 172 | /* Up to this many items will be displayed in response to a |
| 173 | possible-completions call. After that, we ask the user if |
| 174 | she is sure she wants to see them all. */ |
| 175 | int rl_completion_query_items = 100; |
| 176 | |
| 177 | /* The basic list of characters that signal a break between words for the |
| 178 | completer routine. The contents of this variable is what breaks words |
| 179 | in the shell, i.e. " \t\n\"\\'`@$><=" */ |
| 180 | char *rl_basic_word_break_characters = " \t\n\"\\'`@$><=;|&{("; |
| 181 | |
| 182 | /* List of basic quoting characters. */ |
| 183 | char *rl_basic_quote_characters = "\"'"; |
| 184 | |
| 185 | /* The list of characters that signal a break between words for |
| 186 | rl_complete_internal. The default list is the contents of |
| 187 | rl_basic_word_break_characters. */ |
| 188 | char *rl_completer_word_break_characters = (char *)NULL; |
| 189 | |
| 190 | /* List of characters which can be used to quote a substring of the line. |
| 191 | Completion occurs on the entire substring, and within the substring |
| 192 | rl_completer_word_break_characters are treated as any other character, |
| 193 | unless they also appear within this list. */ |
| 194 | char *rl_completer_quote_characters = (char *)NULL; |
| 195 | |
| 196 | /* List of characters that should be quoted in filenames by the completer. */ |
| 197 | char *rl_filename_quote_characters = (char *)NULL; |
| 198 | |
| 199 | /* List of characters that are word break characters, but should be left |
| 200 | in TEXT when it is passed to the completion function. The shell uses |
| 201 | this to help determine what kind of completing to do. */ |
| 202 | char *rl_special_prefixes = (char *)NULL; |
| 203 | |
| 204 | /* If non-zero, then disallow duplicates in the matches. */ |
| 205 | int rl_ignore_completion_duplicates = 1; |
| 206 | |
| 207 | /* Non-zero means that the results of the matches are to be treated |
| 208 | as filenames. This is ALWAYS zero on entry, and can only be changed |
| 209 | within a completion entry finder function. */ |
| 210 | int rl_filename_completion_desired = 0; |
| 211 | |
| 212 | /* Non-zero means that the results of the matches are to be quoted using |
| 213 | double quotes (or an application-specific quoting mechanism) if the |
| 214 | filename contains any characters in rl_filename_quote_chars. This is |
| 215 | ALWAYS non-zero on entry, and can only be changed within a completion |
| 216 | entry finder function. */ |
| 217 | int rl_filename_quoting_desired = 1; |
| 218 | |
| 219 | /* This function, if defined, is called by the completer when real |
| 220 | filename completion is done, after all the matching names have been |
| 221 | generated. It is passed a (char**) known as matches in the code below. |
| 222 | It consists of a NULL-terminated array of pointers to potential |
| 223 | matching strings. The 1st element (matches[0]) is the maximal |
| 224 | substring that is common to all matches. This function can re-arrange |
| 225 | the list of matches as required, but all elements of the array must be |
| 226 | free()'d if they are deleted. The main intent of this function is |
| 227 | to implement FIGNORE a la SunOS csh. */ |
| 228 | Function *rl_ignore_some_completions_function = (Function *)NULL; |
| 229 | |
| 230 | /* Set to a function to quote a filename in an application-specific fashion. |
| 231 | Called with the text to quote, the type of match found (single or multiple) |
| 232 | and a pointer to the quoting character to be used, which the function can |
| 233 | reset if desired. */ |
| 234 | CPFunction *rl_filename_quoting_function = rl_quote_filename; |
| 235 | |
| 236 | /* Function to call to remove quoting characters from a filename. Called |
| 237 | before completion is attempted, so the embedded quotes do not interfere |
| 238 | with matching names in the file system. Readline doesn't do anything |
| 239 | with this; it's set only by applications. */ |
| 240 | CPFunction *rl_filename_dequoting_function = (CPFunction *)NULL; |
| 241 | |
| 242 | /* Function to call to decide whether or not a word break character is |
| 243 | quoted. If a character is quoted, it does not break words for the |
| 244 | completer. */ |
| 245 | Function *rl_char_is_quoted_p = (Function *)NULL; |
| 246 | |
| 247 | /* Character appended to completed words when at the end of the line. The |
| 248 | default is a space. */ |
| 249 | int rl_completion_append_character = ' '; |
| 250 | |
| 251 | /* If non-zero, inhibit completion (temporarily). */ |
| 252 | int rl_inhibit_completion; |
| 253 | |
| 254 | /* Variables local to this file. */ |
| 255 | |
| 256 | /* Local variable states what happened during the last completion attempt. */ |
| 257 | static int completion_changed_buffer; |
| 258 | |
| 259 | /*************************************/ |
| 260 | /* */ |
| 261 | /* Bindable completion functions */ |
| 262 | /* */ |
| 263 | /*************************************/ |
| 264 | |
| 265 | /* Complete the word at or before point. You have supplied the function |
| 266 | that does the initial simple matching selection algorithm (see |
| 267 | completion_matches ()). The default is to do filename completion. */ |
| 268 | int |
| 269 | rl_complete (ignore, invoking_key) |
| 270 | int ignore, invoking_key; |
| 271 | { |
| 272 | if (rl_inhibit_completion) |
| 273 | return (rl_insert (ignore, invoking_key)); |
| 274 | else if (rl_last_func == rl_complete && !completion_changed_buffer) |
| 275 | return (rl_complete_internal ('?')); |
| 276 | else if (_rl_complete_show_all) |
| 277 | return (rl_complete_internal ('!')); |
| 278 | else |
| 279 | return (rl_complete_internal (TAB)); |
| 280 | } |
| 281 | |
| 282 | /* List the possible completions. See description of rl_complete (). */ |
| 283 | int |
| 284 | rl_possible_completions (ignore, invoking_key) |
| 285 | int ignore, invoking_key; |
| 286 | { |
| 287 | return (rl_complete_internal ('?')); |
| 288 | } |
| 289 | |
| 290 | int |
| 291 | rl_insert_completions (ignore, invoking_key) |
| 292 | int ignore, invoking_key; |
| 293 | { |
| 294 | return (rl_complete_internal ('*')); |
| 295 | } |
| 296 | |
| 297 | /************************************/ |
| 298 | /* */ |
| 299 | /* Completion utility functions */ |
| 300 | /* */ |
| 301 | /************************************/ |
| 302 | |
| 303 | /* Find the first occurrence in STRING1 of any character from STRING2. |
| 304 | Return a pointer to the character in STRING1. */ |
| 305 | static char * |
| 306 | rl_strpbrk (string1, string2) |
| 307 | char *string1, *string2; |
| 308 | { |
| 309 | register char *scan; |
| 310 | |
| 311 | for (; *string1; string1++) |
| 312 | { |
| 313 | for (scan = string2; *scan; scan++) |
| 314 | { |
| 315 | if (*string1 == *scan) |
| 316 | { |
| 317 | return (string1); |
| 318 | } |
| 319 | } |
| 320 | } |
| 321 | return ((char *)NULL); |
| 322 | } |
| 323 | |
| 324 | /* The user must press "y" or "n". Non-zero return means "y" pressed. */ |
| 325 | static int |
| 326 | get_y_or_n () |
| 327 | { |
| 328 | int c; |
| 329 | |
| 330 | for (;;) |
| 331 | { |
| 332 | c = rl_read_key (); |
| 333 | if (c == 'y' || c == 'Y' || c == ' ') |
| 334 | return (1); |
| 335 | if (c == 'n' || c == 'N' || c == RUBOUT) |
| 336 | return (0); |
| 337 | if (c == ABORT_CHAR) |
| 338 | _rl_abort_internal (); |
| 339 | ding (); |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | #if defined (VISIBLE_STATS) |
| 344 | /* Return the character which best describes FILENAME. |
| 345 | `@' for symbolic links |
| 346 | `/' for directories |
| 347 | `*' for executables |
| 348 | `=' for sockets |
| 349 | `|' for FIFOs |
| 350 | `%' for character special devices |
| 351 | `#' for block special devices */ |
| 352 | static int |
| 353 | stat_char (filename) |
| 354 | char *filename; |
| 355 | { |
| 356 | struct stat finfo; |
| 357 | int character, r; |
| 358 | |
| 359 | #if defined (HAVE_LSTAT) && defined (S_ISLNK) |
| 360 | r = lstat (filename, &finfo); |
| 361 | #else |
| 362 | r = stat (filename, &finfo); |
| 363 | #endif |
| 364 | |
| 365 | if (r == -1) |
| 366 | return (0); |
| 367 | |
| 368 | character = 0; |
| 369 | if (S_ISDIR (finfo.st_mode)) |
| 370 | character = '/'; |
| 371 | #if defined (S_ISCHR) |
| 372 | else if (S_ISCHR (finfo.st_mode)) |
| 373 | character = '%'; |
| 374 | #endif /* S_ISCHR */ |
| 375 | #if defined (S_ISBLK) |
| 376 | else if (S_ISBLK (finfo.st_mode)) |
| 377 | character = '#'; |
| 378 | #endif /* S_ISBLK */ |
| 379 | #if defined (S_ISLNK) |
| 380 | else if (S_ISLNK (finfo.st_mode)) |
| 381 | character = '@'; |
| 382 | #endif /* S_ISLNK */ |
| 383 | #if defined (S_ISSOCK) |
| 384 | else if (S_ISSOCK (finfo.st_mode)) |
| 385 | character = '='; |
| 386 | #endif /* S_ISSOCK */ |
| 387 | #if defined (S_ISFIFO) |
| 388 | else if (S_ISFIFO (finfo.st_mode)) |
| 389 | character = '|'; |
| 390 | #endif |
| 391 | else if (S_ISREG (finfo.st_mode)) |
| 392 | { |
| 393 | if (access (filename, X_OK) == 0) |
| 394 | character = '*'; |
| 395 | } |
| 396 | return (character); |
| 397 | } |
| 398 | #endif /* VISIBLE_STATS */ |
| 399 | |
| 400 | /* Return the portion of PATHNAME that should be output when listing |
| 401 | possible completions. If we are hacking filename completion, we |
| 402 | are only interested in the basename, the portion following the |
| 403 | final slash. Otherwise, we return what we were passed. */ |
| 404 | static char * |
| 405 | printable_part (pathname) |
| 406 | char *pathname; |
| 407 | { |
| 408 | char *temp; |
| 409 | |
| 410 | temp = rl_filename_completion_desired ? strrchr (pathname, '/') : (char *)NULL; |
| 411 | return (temp ? ++temp : pathname); |
| 412 | } |
| 413 | |
| 414 | /* Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and we |
| 415 | are using it, check for and output a single character for `special' |
| 416 | filenames. Return the number of characters we output. */ |
| 417 | |
| 418 | #define PUTX(c) \ |
| 419 | do { \ |
| 420 | if (CTRL_CHAR (c)) \ |
| 421 | { \ |
| 422 | putc ('^', rl_outstream); \ |
| 423 | putc (UNCTRL (c), rl_outstream); \ |
| 424 | printed_len += 2; \ |
| 425 | } \ |
| 426 | else if (c == RUBOUT) \ |
| 427 | { \ |
| 428 | putc ('^', rl_outstream); \ |
| 429 | putc ('?', rl_outstream); \ |
| 430 | printed_len += 2; \ |
| 431 | } \ |
| 432 | else \ |
| 433 | { \ |
| 434 | putc (c, rl_outstream); \ |
| 435 | printed_len++; \ |
| 436 | } \ |
| 437 | } while (0) |
| 438 | |
| 439 | static int |
| 440 | print_filename (to_print, full_pathname) |
| 441 | char *to_print, *full_pathname; |
| 442 | { |
| 443 | int printed_len = 0; |
| 444 | #if !defined (VISIBLE_STATS) |
| 445 | char *s; |
| 446 | |
| 447 | for (s = to_print; *s; s++) |
| 448 | { |
| 449 | PUTX (*s); |
| 450 | } |
| 451 | #else |
| 452 | char *s, c, *new_full_pathname; |
| 453 | int extension_char, slen, tlen; |
| 454 | |
| 455 | for (s = to_print; *s; s++) |
| 456 | { |
| 457 | PUTX (*s); |
| 458 | } |
| 459 | |
| 460 | if (rl_filename_completion_desired && rl_visible_stats) |
| 461 | { |
| 462 | /* If to_print != full_pathname, to_print is the basename of the |
| 463 | path passed. In this case, we try to expand the directory |
| 464 | name before checking for the stat character. */ |
| 465 | if (to_print != full_pathname) |
| 466 | { |
| 467 | /* Terminate the directory name. */ |
| 468 | c = to_print[-1]; |
| 469 | to_print[-1] = '\0'; |
| 470 | |
| 471 | s = tilde_expand (full_pathname); |
| 472 | if (rl_directory_completion_hook) |
| 473 | (*rl_directory_completion_hook) (&s); |
| 474 | |
| 475 | slen = strlen (s); |
| 476 | tlen = strlen (to_print); |
| 477 | new_full_pathname = xmalloc (slen + tlen + 2); |
| 478 | strcpy (new_full_pathname, s); |
| 479 | new_full_pathname[slen] = '/'; |
| 480 | strcpy (new_full_pathname + slen + 1, to_print); |
| 481 | |
| 482 | extension_char = stat_char (new_full_pathname); |
| 483 | |
| 484 | free (new_full_pathname); |
| 485 | to_print[-1] = c; |
| 486 | } |
| 487 | else |
| 488 | { |
| 489 | s = tilde_expand (full_pathname); |
| 490 | extension_char = stat_char (s); |
| 491 | } |
| 492 | |
| 493 | free (s); |
| 494 | if (extension_char) |
| 495 | { |
| 496 | putc (extension_char, rl_outstream); |
| 497 | printed_len++; |
| 498 | } |
| 499 | } |
| 500 | #endif /* VISIBLE_STATS */ |
| 501 | return printed_len; |
| 502 | } |
| 503 | |
| 504 | static char * |
| 505 | rl_quote_filename (s, rtype, qcp) |
| 506 | char *s; |
| 507 | int rtype; |
| 508 | char *qcp; |
| 509 | { |
| 510 | char *r; |
| 511 | |
| 512 | r = xmalloc (strlen (s) + 2); |
| 513 | *r = *rl_completer_quote_characters; |
| 514 | strcpy (r + 1, s); |
| 515 | if (qcp) |
| 516 | *qcp = *rl_completer_quote_characters; |
| 517 | return r; |
| 518 | } |
| 519 | |
| 520 | /* Find the bounds of the current word for completion purposes, and leave |
| 521 | rl_point set to the end of the word. This function skips quoted |
| 522 | substrings (characters between matched pairs of characters in |
| 523 | rl_completer_quote_characters. First we try to find an unclosed |
| 524 | quoted substring on which to do matching. If one is not found, we use |
| 525 | the word break characters to find the boundaries of the current word. |
| 526 | We call an application-specific function to decide whether or not a |
| 527 | particular word break character is quoted; if that function returns a |
| 528 | non-zero result, the character does not break a word. This function |
| 529 | returns the opening quote character if we found an unclosed quoted |
| 530 | substring, '\0' otherwise. FP, if non-null, is set to a value saying |
| 531 | which (shell-like) quote characters we found (single quote, double |
| 532 | quote, or backslash) anywhere in the string. DP, if non-null, is set to |
| 533 | the value of the delimiter character that caused a word break. */ |
| 534 | |
| 535 | static char |
| 536 | find_completion_word (fp, dp) |
| 537 | int *fp, *dp; |
| 538 | { |
| 539 | int scan, end, found_quote, delimiter, pass_next, isbrk; |
| 540 | char quote_char; |
| 541 | |
| 542 | end = rl_point; |
| 543 | found_quote = delimiter = 0; |
| 544 | quote_char = '\0'; |
| 545 | |
| 546 | if (rl_completer_quote_characters) |
| 547 | { |
| 548 | /* We have a list of characters which can be used in pairs to |
| 549 | quote substrings for the completer. Try to find the start |
| 550 | of an unclosed quoted substring. */ |
| 551 | /* FOUND_QUOTE is set so we know what kind of quotes we found. */ |
| 552 | for (scan = pass_next = 0; scan < end; scan++) |
| 553 | { |
| 554 | if (pass_next) |
| 555 | { |
| 556 | pass_next = 0; |
| 557 | continue; |
| 558 | } |
| 559 | |
| 560 | if (rl_line_buffer[scan] == '\\') |
| 561 | { |
| 562 | pass_next = 1; |
| 563 | found_quote |= RL_QF_BACKSLASH; |
| 564 | continue; |
| 565 | } |
| 566 | |
| 567 | if (quote_char != '\0') |
| 568 | { |
| 569 | /* Ignore everything until the matching close quote char. */ |
| 570 | if (rl_line_buffer[scan] == quote_char) |
| 571 | { |
| 572 | /* Found matching close. Abandon this substring. */ |
| 573 | quote_char = '\0'; |
| 574 | rl_point = end; |
| 575 | } |
| 576 | } |
| 577 | else if (strchr (rl_completer_quote_characters, rl_line_buffer[scan])) |
| 578 | { |
| 579 | /* Found start of a quoted substring. */ |
| 580 | quote_char = rl_line_buffer[scan]; |
| 581 | rl_point = scan + 1; |
| 582 | /* Shell-like quoting conventions. */ |
| 583 | if (quote_char == '\'') |
| 584 | found_quote |= RL_QF_SINGLE_QUOTE; |
| 585 | else if (quote_char == '"') |
| 586 | found_quote |= RL_QF_DOUBLE_QUOTE; |
| 587 | } |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | if (rl_point == end && quote_char == '\0') |
| 592 | { |
| 593 | /* We didn't find an unclosed quoted substring upon which to do |
| 594 | completion, so use the word break characters to find the |
| 595 | substring on which to complete. */ |
| 596 | while (--rl_point) |
| 597 | { |
| 598 | scan = rl_line_buffer[rl_point]; |
| 599 | |
| 600 | if (strchr (rl_completer_word_break_characters, scan) == 0) |
| 601 | continue; |
| 602 | |
| 603 | /* Call the application-specific function to tell us whether |
| 604 | this word break character is quoted and should be skipped. */ |
| 605 | if (rl_char_is_quoted_p && found_quote && |
| 606 | (*rl_char_is_quoted_p) (rl_line_buffer, rl_point)) |
| 607 | continue; |
| 608 | |
| 609 | /* Convoluted code, but it avoids an n^2 algorithm with calls |
| 610 | to char_is_quoted. */ |
| 611 | break; |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | /* If we are at an unquoted word break, then advance past it. */ |
| 616 | scan = rl_line_buffer[rl_point]; |
| 617 | |
| 618 | /* If there is an application-specific function to say whether or not |
| 619 | a character is quoted and we found a quote character, let that |
| 620 | function decide whether or not a character is a word break, even |
| 621 | if it is found in rl_completer_word_break_characters. */ |
| 622 | if (rl_char_is_quoted_p) |
| 623 | isbrk = (found_quote == 0 || |
| 624 | (*rl_char_is_quoted_p) (rl_line_buffer, rl_point) == 0) && |
| 625 | strchr (rl_completer_word_break_characters, scan) != 0; |
| 626 | else |
| 627 | isbrk = strchr (rl_completer_word_break_characters, scan) != 0; |
| 628 | |
| 629 | if (isbrk) |
| 630 | { |
| 631 | /* If the character that caused the word break was a quoting |
| 632 | character, then remember it as the delimiter. */ |
| 633 | if (rl_basic_quote_characters && strchr (rl_basic_quote_characters, scan) && (end - rl_point) > 1) |
| 634 | delimiter = scan; |
| 635 | |
| 636 | /* If the character isn't needed to determine something special |
| 637 | about what kind of completion to perform, then advance past it. */ |
| 638 | if (rl_special_prefixes == 0 || strchr (rl_special_prefixes, scan) == 0) |
| 639 | rl_point++; |
| 640 | } |
| 641 | |
| 642 | if (fp) |
| 643 | *fp = found_quote; |
| 644 | if (dp) |
| 645 | *dp = delimiter; |
| 646 | |
| 647 | return (quote_char); |
| 648 | } |
| 649 | |
| 650 | static char ** |
| 651 | gen_completion_matches (text, start, end, our_func, found_quote, quote_char) |
| 652 | char *text; |
| 653 | int start, end; |
| 654 | Function *our_func; |
| 655 | int found_quote, quote_char; |
| 656 | { |
| 657 | char **matches, *temp; |
| 658 | |
| 659 | /* If the user wants to TRY to complete, but then wants to give |
| 660 | up and use the default completion function, they set the |
| 661 | variable rl_attempted_completion_function. */ |
| 662 | if (rl_attempted_completion_function) |
| 663 | { |
| 664 | matches = (*rl_attempted_completion_function) (text, start, end); |
| 665 | |
| 666 | if (matches || rl_attempted_completion_over) |
| 667 | { |
| 668 | rl_attempted_completion_over = 0; |
| 669 | return (matches); |
| 670 | } |
| 671 | } |
| 672 | |
| 673 | /* Beware -- we're stripping the quotes here. Do this only if we know |
| 674 | we are doing filename completion and the application has defined a |
| 675 | filename dequoting function. */ |
| 676 | temp = (char *)NULL; |
| 677 | if (found_quote && our_func == (Function *)filename_completion_function && |
| 678 | rl_filename_dequoting_function) |
| 679 | { |
| 680 | /* delete single and double quotes */ |
| 681 | temp = (*rl_filename_dequoting_function) (text, quote_char); |
| 682 | text = temp; /* not freeing text is not a memory leak */ |
| 683 | } |
| 684 | |
| 685 | matches = completion_matches (text, our_func); |
| 686 | FREE (temp); |
| 687 | return matches; |
| 688 | } |
| 689 | |
| 690 | /* Filter out duplicates in MATCHES. This frees up the strings in |
| 691 | MATCHES. */ |
| 692 | static char ** |
| 693 | remove_duplicate_matches (matches) |
| 694 | char **matches; |
| 695 | { |
| 696 | char *lowest_common; |
| 697 | int i, j, newlen; |
| 698 | char dead_slot; |
| 699 | char **temp_array; |
| 700 | |
| 701 | /* Sort the items. */ |
| 702 | for (i = 0; matches[i]; i++) |
| 703 | ; |
| 704 | |
| 705 | /* Sort the array without matches[0], since we need it to |
| 706 | stay in place no matter what. */ |
| 707 | if (i) |
| 708 | qsort (matches+1, i-1, sizeof (char *), _rl_qsort_string_compare); |
| 709 | |
| 710 | /* Remember the lowest common denominator for it may be unique. */ |
| 711 | lowest_common = savestring (matches[0]); |
| 712 | |
| 713 | for (i = newlen = 0; matches[i + 1]; i++) |
| 714 | { |
| 715 | if (strcmp (matches[i], matches[i + 1]) == 0) |
| 716 | { |
| 717 | free (matches[i]); |
| 718 | matches[i] = (char *)&dead_slot; |
| 719 | } |
| 720 | else |
| 721 | newlen++; |
| 722 | } |
| 723 | |
| 724 | /* We have marked all the dead slots with (char *)&dead_slot. |
| 725 | Copy all the non-dead entries into a new array. */ |
| 726 | temp_array = (char **)xmalloc ((3 + newlen) * sizeof (char *)); |
| 727 | for (i = j = 1; matches[i]; i++) |
| 728 | { |
| 729 | if (matches[i] != (char *)&dead_slot) |
| 730 | temp_array[j++] = matches[i]; |
| 731 | } |
| 732 | temp_array[j] = (char *)NULL; |
| 733 | |
| 734 | if (matches[0] != (char *)&dead_slot) |
| 735 | free (matches[0]); |
| 736 | |
| 737 | /* Place the lowest common denominator back in [0]. */ |
| 738 | temp_array[0] = lowest_common; |
| 739 | |
| 740 | /* If there is one string left, and it is identical to the |
| 741 | lowest common denominator, then the LCD is the string to |
| 742 | insert. */ |
| 743 | if (j == 2 && strcmp (temp_array[0], temp_array[1]) == 0) |
| 744 | { |
| 745 | free (temp_array[1]); |
| 746 | temp_array[1] = (char *)NULL; |
| 747 | } |
| 748 | return (temp_array); |
| 749 | } |
| 750 | |
| 751 | /* Find the common prefix of the list of matches, and put it into |
| 752 | matches[0]. */ |
| 753 | static int |
| 754 | compute_lcd_of_matches (match_list, matches, text) |
| 755 | char **match_list; |
| 756 | int matches; |
| 757 | char *text; |
| 758 | { |
| 759 | register int i, c1, c2, si; |
| 760 | int low; /* Count of max-matched characters. */ |
| 761 | |
| 762 | /* If only one match, just use that. Otherwise, compare each |
| 763 | member of the list with the next, finding out where they |
| 764 | stop matching. */ |
| 765 | if (matches == 1) |
| 766 | { |
| 767 | match_list[0] = match_list[1]; |
| 768 | match_list[1] = (char *)NULL; |
| 769 | return 1; |
| 770 | } |
| 771 | |
| 772 | for (i = 1, low = 100000; i < matches; i++) |
| 773 | { |
| 774 | if (_rl_completion_case_fold) |
| 775 | { |
| 776 | for (si = 0; |
| 777 | (c1 = _rl_to_lower(match_list[i][si])) && |
| 778 | (c2 = _rl_to_lower(match_list[i + 1][si])); |
| 779 | si++) |
| 780 | if (c1 != c2) |
| 781 | break; |
| 782 | } |
| 783 | else |
| 784 | { |
| 785 | for (si = 0; |
| 786 | (c1 = match_list[i][si]) && |
| 787 | (c2 = match_list[i + 1][si]); |
| 788 | si++) |
| 789 | if (c1 != c2) |
| 790 | break; |
| 791 | } |
| 792 | |
| 793 | if (low > si) |
| 794 | low = si; |
| 795 | } |
| 796 | |
| 797 | /* If there were multiple matches, but none matched up to even the |
| 798 | first character, and the user typed something, use that as the |
| 799 | value of matches[0]. */ |
| 800 | if (low == 0 && text && *text) |
| 801 | { |
| 802 | match_list[0] = xmalloc (strlen (text) + 1); |
| 803 | strcpy (match_list[0], text); |
| 804 | } |
| 805 | else |
| 806 | { |
| 807 | match_list[0] = xmalloc (low + 1); |
| 808 | strncpy (match_list[0], match_list[1], low); |
| 809 | match_list[0][low] = '\0'; |
| 810 | } |
| 811 | |
| 812 | return matches; |
| 813 | } |
| 814 | |
| 815 | static int |
| 816 | postprocess_matches (text, matchesp, matching_filenames) |
| 817 | char *text; |
| 818 | char ***matchesp; |
| 819 | int matching_filenames; |
| 820 | { |
| 821 | char *t, **matches, **temp_matches; |
| 822 | int nmatch, i; |
| 823 | |
| 824 | matches = *matchesp; |
| 825 | |
| 826 | /* It seems to me that in all the cases we handle we would like |
| 827 | to ignore duplicate possiblilities. Scan for the text to |
| 828 | insert being identical to the other completions. */ |
| 829 | if (rl_ignore_completion_duplicates) |
| 830 | { |
| 831 | temp_matches = remove_duplicate_matches (matches); |
| 832 | free (matches); |
| 833 | matches = temp_matches; |
| 834 | } |
| 835 | |
| 836 | /* If we are matching filenames, then here is our chance to |
| 837 | do clever processing by re-examining the list. Call the |
| 838 | ignore function with the array as a parameter. It can |
| 839 | munge the array, deleting matches as it desires. */ |
| 840 | if (rl_ignore_some_completions_function && matching_filenames) |
| 841 | { |
| 842 | for (nmatch = 1; matches[nmatch]; nmatch++) |
| 843 | ; |
| 844 | (void)(*rl_ignore_some_completions_function) (matches); |
| 845 | if (matches == 0 || matches[0] == 0) |
| 846 | { |
| 847 | FREE (matches); |
| 848 | ding (); |
| 849 | *matchesp = (char **)0; |
| 850 | return 0; |
| 851 | } |
| 852 | else |
| 853 | { |
| 854 | /* If we removed some matches, recompute the common prefix. */ |
| 855 | for (i = 1; matches[i]; i++) |
| 856 | ; |
| 857 | if (i > 1 && i < nmatch) |
| 858 | { |
| 859 | t = matches[0]; |
| 860 | compute_lcd_of_matches (matches, i - 1, text); |
| 861 | FREE (t); |
| 862 | } |
| 863 | } |
| 864 | } |
| 865 | |
| 866 | *matchesp = matches; |
| 867 | return (1); |
| 868 | } |
| 869 | |
| 870 | static void |
| 871 | display_matches (matches) |
| 872 | char **matches; |
| 873 | { |
| 874 | int len, count, limit, max, printed_len; |
| 875 | int i, j, k, l; |
| 876 | char *temp; |
| 877 | |
| 878 | /* Move to the last visible line of a possibly-multiple-line command. */ |
| 879 | _rl_move_vert (_rl_vis_botlin); |
| 880 | |
| 881 | /* Handle simple case first. What if there is only one answer? */ |
| 882 | if (matches[1] == 0) |
| 883 | { |
| 884 | temp = printable_part (matches[0]); |
| 885 | crlf (); |
| 886 | print_filename (temp, matches[0]); |
| 887 | crlf (); |
| 888 | #if 0 |
| 889 | rl_on_new_line (); |
| 890 | #else |
| 891 | rl_forced_update_display (); |
| 892 | rl_display_fixed = 1; |
| 893 | #endif |
| 894 | return; |
| 895 | } |
| 896 | |
| 897 | /* There is more than one answer. Find out how many there are, |
| 898 | and find the maximum printed length of a single entry. */ |
| 899 | for (max = 0, i = 1; matches[i]; i++) |
| 900 | { |
| 901 | temp = printable_part (matches[i]); |
| 902 | len = strlen (temp); |
| 903 | |
| 904 | if (len > max) |
| 905 | max = len; |
| 906 | } |
| 907 | |
| 908 | len = i - 1; |
| 909 | |
| 910 | /* If there are many items, then ask the user if she really wants to |
| 911 | see them all. */ |
| 912 | if (len >= rl_completion_query_items) |
| 913 | { |
| 914 | crlf (); |
| 915 | fprintf (rl_outstream, "Display all %d possibilities? (y or n)", len); |
| 916 | fflush (rl_outstream); |
| 917 | if (get_y_or_n () == 0) |
| 918 | { |
| 919 | crlf (); |
| 920 | #if 0 |
| 921 | rl_on_new_line (); |
| 922 | #else |
| 923 | rl_forced_update_display (); |
| 924 | rl_display_fixed = 1; |
| 925 | #endif |
| 926 | return; |
| 927 | } |
| 928 | } |
| 929 | |
| 930 | /* How many items of MAX length can we fit in the screen window? */ |
| 931 | max += 2; |
| 932 | limit = screenwidth / max; |
| 933 | if (limit != 1 && (limit * max == screenwidth)) |
| 934 | limit--; |
| 935 | |
| 936 | /* Avoid a possible floating exception. If max > screenwidth, |
| 937 | limit will be 0 and a divide-by-zero fault will result. */ |
| 938 | if (limit == 0) |
| 939 | limit = 1; |
| 940 | |
| 941 | /* How many iterations of the printing loop? */ |
| 942 | count = (len + (limit - 1)) / limit; |
| 943 | |
| 944 | /* Watch out for special case. If LEN is less than LIMIT, then |
| 945 | just do the inner printing loop. |
| 946 | 0 < len <= limit implies count = 1. */ |
| 947 | |
| 948 | /* Sort the items if they are not already sorted. */ |
| 949 | if (rl_ignore_completion_duplicates == 0) |
| 950 | qsort (matches + 1, len, sizeof (char *), _rl_qsort_string_compare); |
| 951 | |
| 952 | crlf (); |
| 953 | |
| 954 | if (_rl_print_completions_horizontally == 0) |
| 955 | { |
| 956 | /* Print the sorted items, up-and-down alphabetically, like ls. */ |
| 957 | for (i = 1; i <= count; i++) |
| 958 | { |
| 959 | for (j = 0, l = i; j < limit; j++) |
| 960 | { |
| 961 | if (l > len || matches[l] == 0) |
| 962 | break; |
| 963 | else |
| 964 | { |
| 965 | temp = printable_part (matches[l]); |
| 966 | printed_len = print_filename (temp, matches[l]); |
| 967 | |
| 968 | if (j + 1 < limit) |
| 969 | for (k = 0; k < max - printed_len; k++) |
| 970 | putc (' ', rl_outstream); |
| 971 | } |
| 972 | l += count; |
| 973 | } |
| 974 | crlf (); |
| 975 | } |
| 976 | } |
| 977 | else |
| 978 | { |
| 979 | /* Print the sorted items, across alphabetically, like ls -x. */ |
| 980 | for (i = 1; matches[i]; i++) |
| 981 | { |
| 982 | temp = printable_part (matches[i]); |
| 983 | printed_len = print_filename (temp, matches[i]); |
| 984 | /* Have we reached the end of this line? */ |
| 985 | if (matches[i+1]) |
| 986 | { |
| 987 | if (i && (limit > 1) && (i % limit) == 0) |
| 988 | crlf (); |
| 989 | else |
| 990 | for (k = 0; k < max - printed_len; k++) |
| 991 | putc (' ', rl_outstream); |
| 992 | } |
| 993 | } |
| 994 | crlf (); |
| 995 | } |
| 996 | |
| 997 | #if 0 |
| 998 | rl_on_new_line (); |
| 999 | #else |
| 1000 | rl_forced_update_display (); |
| 1001 | rl_display_fixed = 1; |
| 1002 | #endif |
| 1003 | } |
| 1004 | |
| 1005 | static char * |
| 1006 | make_quoted_replacement (match, mtype, qc) |
| 1007 | char *match; |
| 1008 | int mtype; |
| 1009 | char *qc; /* Pointer to quoting character, if any */ |
| 1010 | { |
| 1011 | int should_quote, do_replace; |
| 1012 | char *replacement; |
| 1013 | |
| 1014 | /* If we are doing completion on quoted substrings, and any matches |
| 1015 | contain any of the completer_word_break_characters, then auto- |
| 1016 | matically prepend the substring with a quote character (just pick |
| 1017 | the first one from the list of such) if it does not already begin |
| 1018 | with a quote string. FIXME: Need to remove any such automatically |
| 1019 | inserted quote character when it no longer is necessary, such as |
| 1020 | if we change the string we are completing on and the new set of |
| 1021 | matches don't require a quoted substring. */ |
| 1022 | replacement = match; |
| 1023 | |
| 1024 | should_quote = match && rl_completer_quote_characters && |
| 1025 | rl_filename_completion_desired && |
| 1026 | rl_filename_quoting_desired; |
| 1027 | |
| 1028 | if (should_quote) |
| 1029 | #if defined (SHELL) |
| 1030 | should_quote = should_quote && (!qc || !*qc || *qc == '"' || *qc == '\''); |
| 1031 | #else /* !SHELL */ |
| 1032 | should_quote = should_quote && (!qc || !*qc); |
| 1033 | #endif /* !SHELL */ |
| 1034 | |
| 1035 | if (should_quote) |
| 1036 | { |
| 1037 | /* If there is a single match, see if we need to quote it. |
| 1038 | This also checks whether the common prefix of several |
| 1039 | matches needs to be quoted. */ |
| 1040 | should_quote = rl_filename_quote_characters |
| 1041 | ? (rl_strpbrk (match, rl_filename_quote_characters) != 0) |
| 1042 | : 0; |
| 1043 | |
| 1044 | do_replace = should_quote ? mtype : NO_MATCH; |
| 1045 | /* Quote the replacement, since we found an embedded |
| 1046 | word break character in a potential match. */ |
| 1047 | if (do_replace != NO_MATCH && rl_filename_quoting_function) |
| 1048 | replacement = (*rl_filename_quoting_function) (match, do_replace, qc); |
| 1049 | } |
| 1050 | return (replacement); |
| 1051 | } |
| 1052 | |
| 1053 | static void |
| 1054 | insert_match (match, start, mtype, qc) |
| 1055 | char *match; |
| 1056 | int start, mtype; |
| 1057 | char *qc; |
| 1058 | { |
| 1059 | char *replacement; |
| 1060 | char oqc; |
| 1061 | |
| 1062 | oqc = qc ? *qc : '\0'; |
| 1063 | replacement = make_quoted_replacement (match, mtype, qc); |
| 1064 | |
| 1065 | /* Now insert the match. */ |
| 1066 | if (replacement) |
| 1067 | { |
| 1068 | /* Don't double an opening quote character. */ |
| 1069 | if (qc && *qc && start && rl_line_buffer[start - 1] == *qc && |
| 1070 | replacement[0] == *qc) |
| 1071 | start--; |
| 1072 | /* If make_quoted_replacement changed the quoting character, remove |
| 1073 | the opening quote and insert the (fully-quoted) replacement. */ |
| 1074 | else if (qc && (*qc != oqc) && start && rl_line_buffer[start - 1] == oqc && |
| 1075 | replacement[0] != oqc) |
| 1076 | start--; |
| 1077 | _rl_replace_text (replacement, start, rl_point - 1); |
| 1078 | if (replacement != match) |
| 1079 | free (replacement); |
| 1080 | } |
| 1081 | } |
| 1082 | |
| 1083 | /* Append any necessary closing quote and a separator character to the |
| 1084 | just-inserted match. If the user has specified that directories |
| 1085 | should be marked by a trailing `/', append one of those instead. The |
| 1086 | default trailing character is a space. Returns the number of characters |
| 1087 | appended. */ |
| 1088 | static int |
| 1089 | append_to_match (text, delimiter, quote_char) |
| 1090 | char *text; |
| 1091 | int delimiter, quote_char; |
| 1092 | { |
| 1093 | char temp_string[4], *filename; |
| 1094 | int temp_string_index; |
| 1095 | struct stat finfo; |
| 1096 | |
| 1097 | temp_string_index = 0; |
| 1098 | if (quote_char && rl_point && rl_line_buffer[rl_point - 1] != quote_char) |
| 1099 | temp_string[temp_string_index++] = quote_char; |
| 1100 | |
| 1101 | if (delimiter) |
| 1102 | temp_string[temp_string_index++] = delimiter; |
| 1103 | else if (rl_completion_append_character) |
| 1104 | temp_string[temp_string_index++] = rl_completion_append_character; |
| 1105 | |
| 1106 | temp_string[temp_string_index++] = '\0'; |
| 1107 | |
| 1108 | if (rl_filename_completion_desired) |
| 1109 | { |
| 1110 | filename = tilde_expand (text); |
| 1111 | if (stat (filename, &finfo) == 0 && S_ISDIR (finfo.st_mode)) |
| 1112 | { |
| 1113 | if (_rl_complete_mark_directories && rl_line_buffer[rl_point] != '/') |
| 1114 | rl_insert_text ("/"); |
| 1115 | } |
| 1116 | else |
| 1117 | { |
| 1118 | if (rl_point == rl_end) |
| 1119 | rl_insert_text (temp_string); |
| 1120 | } |
| 1121 | free (filename); |
| 1122 | } |
| 1123 | else |
| 1124 | { |
| 1125 | if (rl_point == rl_end) |
| 1126 | rl_insert_text (temp_string); |
| 1127 | } |
| 1128 | |
| 1129 | return (temp_string_index); |
| 1130 | } |
| 1131 | |
| 1132 | static void |
| 1133 | insert_all_matches (matches, point, qc) |
| 1134 | char **matches; |
| 1135 | int point; |
| 1136 | char *qc; |
| 1137 | { |
| 1138 | int i; |
| 1139 | char *rp; |
| 1140 | |
| 1141 | rl_begin_undo_group (); |
| 1142 | /* remove any opening quote character; make_quoted_replacement will add |
| 1143 | it back. */ |
| 1144 | if (qc && *qc && point && rl_line_buffer[point - 1] == *qc) |
| 1145 | point--; |
| 1146 | rl_delete_text (point, rl_point); |
| 1147 | rl_point = point; |
| 1148 | |
| 1149 | if (matches[1]) |
| 1150 | { |
| 1151 | for (i = 1; matches[i]; i++) |
| 1152 | { |
| 1153 | rp = make_quoted_replacement (matches[i], SINGLE_MATCH, qc); |
| 1154 | rl_insert_text (rp); |
| 1155 | rl_insert_text (" "); |
| 1156 | if (rp != matches[i]) |
| 1157 | free (rp); |
| 1158 | } |
| 1159 | } |
| 1160 | else |
| 1161 | { |
| 1162 | rp = make_quoted_replacement (matches[0], SINGLE_MATCH, qc); |
| 1163 | rl_insert_text (rp); |
| 1164 | rl_insert_text (" "); |
| 1165 | if (rp != matches[0]) |
| 1166 | free (rp); |
| 1167 | } |
| 1168 | rl_end_undo_group (); |
| 1169 | } |
| 1170 | |
| 1171 | /* Complete the word at or before point. |
| 1172 | WHAT_TO_DO says what to do with the completion. |
| 1173 | `?' means list the possible completions. |
| 1174 | TAB means do standard completion. |
| 1175 | `*' means insert all of the possible completions. |
| 1176 | `!' means to do standard completion, and list all possible completions if |
| 1177 | there is more than one. */ |
| 1178 | int |
| 1179 | rl_complete_internal (what_to_do) |
| 1180 | int what_to_do; |
| 1181 | { |
| 1182 | char **matches; |
| 1183 | Function *our_func; |
| 1184 | int start, end, delimiter, found_quote, i; |
| 1185 | char *text, *saved_line_buffer; |
| 1186 | char quote_char; |
| 1187 | |
| 1188 | /* Only the completion entry function can change these. */ |
| 1189 | rl_filename_completion_desired = 0; |
| 1190 | rl_filename_quoting_desired = 1; |
| 1191 | rl_completion_type = what_to_do; |
| 1192 | |
| 1193 | saved_line_buffer = rl_line_buffer ? savestring (rl_line_buffer) : (char *)NULL; |
| 1194 | our_func = rl_completion_entry_function |
| 1195 | ? rl_completion_entry_function |
| 1196 | : (Function *)filename_completion_function; |
| 1197 | |
| 1198 | /* We now look backwards for the start of a filename/variable word. */ |
| 1199 | end = rl_point; |
| 1200 | found_quote = delimiter = 0; |
| 1201 | quote_char = '\0'; |
| 1202 | |
| 1203 | if (rl_point) |
| 1204 | /* This (possibly) changes rl_point. If it returns a non-zero char, |
| 1205 | we know we have an open quote. */ |
| 1206 | quote_char = find_completion_word (&found_quote, &delimiter); |
| 1207 | |
| 1208 | start = rl_point; |
| 1209 | rl_point = end; |
| 1210 | |
| 1211 | text = rl_copy_text (start, end); |
| 1212 | matches = gen_completion_matches (text, start, end, our_func, found_quote, quote_char); |
| 1213 | |
| 1214 | if (matches == 0) |
| 1215 | { |
| 1216 | ding (); |
| 1217 | FREE (saved_line_buffer); |
| 1218 | free (text); |
| 1219 | return (0); |
| 1220 | } |
| 1221 | |
| 1222 | /* If we are matching filenames, our_func will have been set to |
| 1223 | filename_completion_function */ |
| 1224 | i = our_func == (Function *)filename_completion_function; |
| 1225 | if (postprocess_matches (text, &matches, i) == 0) |
| 1226 | { |
| 1227 | FREE (saved_line_buffer); |
| 1228 | free (text); |
| 1229 | return (0); |
| 1230 | } |
| 1231 | |
| 1232 | free (text); |
| 1233 | |
| 1234 | switch (what_to_do) |
| 1235 | { |
| 1236 | case TAB: |
| 1237 | case '!': |
| 1238 | /* Insert the first match with proper quoting. */ |
| 1239 | if (*matches[0]) |
| 1240 | insert_match (matches[0], start, matches[1] ? MULT_MATCH : SINGLE_MATCH, "e_char); |
| 1241 | |
| 1242 | /* If there are more matches, ring the bell to indicate. |
| 1243 | If we are in vi mode, Posix.2 says to not ring the bell. |
| 1244 | If the `show-all-if-ambiguous' variable is set, display |
| 1245 | all the matches immediately. Otherwise, if this was the |
| 1246 | only match, and we are hacking files, check the file to |
| 1247 | see if it was a directory. If so, and the `mark-directories' |
| 1248 | variable is set, add a '/' to the name. If not, and we |
| 1249 | are at the end of the line, then add a space. */ |
| 1250 | if (matches[1]) |
| 1251 | { |
| 1252 | if (what_to_do == '!') |
| 1253 | { |
| 1254 | display_matches (matches); |
| 1255 | break; |
| 1256 | } |
| 1257 | else if (rl_editing_mode != vi_mode) |
| 1258 | ding (); /* There are other matches remaining. */ |
| 1259 | } |
| 1260 | else |
| 1261 | append_to_match (matches[0], delimiter, quote_char); |
| 1262 | |
| 1263 | break; |
| 1264 | |
| 1265 | case '*': |
| 1266 | insert_all_matches (matches, start, "e_char); |
| 1267 | break; |
| 1268 | |
| 1269 | case '?': |
| 1270 | display_matches (matches); |
| 1271 | break; |
| 1272 | |
| 1273 | default: |
| 1274 | fprintf (stderr, "\r\nreadline: bad value %d for what_to_do in rl_complete\n", what_to_do); |
| 1275 | ding (); |
| 1276 | FREE (saved_line_buffer); |
| 1277 | return 1; |
| 1278 | } |
| 1279 | |
| 1280 | for (i = 0; matches[i]; i++) |
| 1281 | free (matches[i]); |
| 1282 | free (matches); |
| 1283 | |
| 1284 | /* Check to see if the line has changed through all of this manipulation. */ |
| 1285 | if (saved_line_buffer) |
| 1286 | { |
| 1287 | completion_changed_buffer = strcmp (rl_line_buffer, saved_line_buffer) != 0; |
| 1288 | free (saved_line_buffer); |
| 1289 | } |
| 1290 | |
| 1291 | return 0; |
| 1292 | } |
| 1293 | |
| 1294 | /***************************************************************/ |
| 1295 | /* */ |
| 1296 | /* Application-callable completion match generator functions */ |
| 1297 | /* */ |
| 1298 | /***************************************************************/ |
| 1299 | |
| 1300 | /* Return an array of (char *) which is a list of completions for TEXT. |
| 1301 | If there are no completions, return a NULL pointer. |
| 1302 | The first entry in the returned array is the substitution for TEXT. |
| 1303 | The remaining entries are the possible completions. |
| 1304 | The array is terminated with a NULL pointer. |
| 1305 | |
| 1306 | ENTRY_FUNCTION is a function of two args, and returns a (char *). |
| 1307 | The first argument is TEXT. |
| 1308 | The second is a state argument; it should be zero on the first call, and |
| 1309 | non-zero on subsequent calls. It returns a NULL pointer to the caller |
| 1310 | when there are no more matches. |
| 1311 | */ |
| 1312 | char ** |
| 1313 | completion_matches (text, entry_function) |
| 1314 | char *text; |
| 1315 | CPFunction *entry_function; |
| 1316 | { |
| 1317 | /* Number of slots in match_list. */ |
| 1318 | int match_list_size; |
| 1319 | |
| 1320 | /* The list of matches. */ |
| 1321 | char **match_list; |
| 1322 | |
| 1323 | /* Number of matches actually found. */ |
| 1324 | int matches; |
| 1325 | |
| 1326 | /* Temporary string binder. */ |
| 1327 | char *string; |
| 1328 | |
| 1329 | matches = 0; |
| 1330 | match_list_size = 10; |
| 1331 | match_list = (char **)xmalloc ((match_list_size + 1) * sizeof (char *)); |
| 1332 | match_list[1] = (char *)NULL; |
| 1333 | |
| 1334 | while (string = (*entry_function) (text, matches)) |
| 1335 | { |
| 1336 | if (matches + 1 == match_list_size) |
| 1337 | match_list = (char **)xrealloc |
| 1338 | (match_list, ((match_list_size += 10) + 1) * sizeof (char *)); |
| 1339 | |
| 1340 | match_list[++matches] = string; |
| 1341 | match_list[matches + 1] = (char *)NULL; |
| 1342 | } |
| 1343 | |
| 1344 | /* If there were any matches, then look through them finding out the |
| 1345 | lowest common denominator. That then becomes match_list[0]. */ |
| 1346 | if (matches) |
| 1347 | compute_lcd_of_matches (match_list, matches, text); |
| 1348 | else /* There were no matches. */ |
| 1349 | { |
| 1350 | free (match_list); |
| 1351 | match_list = (char **)NULL; |
| 1352 | } |
| 1353 | return (match_list); |
| 1354 | } |
| 1355 | |
| 1356 | /* A completion function for usernames. |
| 1357 | TEXT contains a partial username preceded by a random |
| 1358 | character (usually `~'). */ |
| 1359 | char * |
| 1360 | username_completion_function (text, state) |
| 1361 | int state; |
| 1362 | char *text; |
| 1363 | { |
| 1364 | #if defined (__GO32__) || defined (__WIN32__) |
| 1365 | return (char *)NULL; |
| 1366 | #else /* !__GO32__ */ |
| 1367 | static char *username = (char *)NULL; |
| 1368 | static struct passwd *entry; |
| 1369 | static int namelen, first_char, first_char_loc; |
| 1370 | char *value; |
| 1371 | |
| 1372 | if (state == 0) |
| 1373 | { |
| 1374 | FREE (username); |
| 1375 | |
| 1376 | first_char = *text; |
| 1377 | first_char_loc = first_char == '~'; |
| 1378 | |
| 1379 | username = savestring (&text[first_char_loc]); |
| 1380 | namelen = strlen (username); |
| 1381 | setpwent (); |
| 1382 | } |
| 1383 | |
| 1384 | while (entry = getpwent ()) |
| 1385 | { |
| 1386 | /* Null usernames should result in all users as possible completions. */ |
| 1387 | if (namelen == 0 || (STREQN (username, entry->pw_name, namelen))) |
| 1388 | break; |
| 1389 | } |
| 1390 | |
| 1391 | if (entry == 0) |
| 1392 | { |
| 1393 | endpwent (); |
| 1394 | return ((char *)NULL); |
| 1395 | } |
| 1396 | else |
| 1397 | { |
| 1398 | value = xmalloc (2 + strlen (entry->pw_name)); |
| 1399 | |
| 1400 | *value = *text; |
| 1401 | |
| 1402 | strcpy (value + first_char_loc, entry->pw_name); |
| 1403 | |
| 1404 | if (first_char == '~') |
| 1405 | rl_filename_completion_desired = 1; |
| 1406 | |
| 1407 | return (value); |
| 1408 | } |
| 1409 | #endif /* !__GO32__ */ |
| 1410 | } |
| 1411 | |
| 1412 | /* Okay, now we write the entry_function for filename completion. In the |
| 1413 | general case. Note that completion in the shell is a little different |
| 1414 | because of all the pathnames that must be followed when looking up the |
| 1415 | completion for a command. */ |
| 1416 | char * |
| 1417 | filename_completion_function (text, state) |
| 1418 | int state; |
| 1419 | char *text; |
| 1420 | { |
| 1421 | static DIR *directory = (DIR *)NULL; |
| 1422 | static char *filename = (char *)NULL; |
| 1423 | static char *dirname = (char *)NULL; |
| 1424 | static char *users_dirname = (char *)NULL; |
| 1425 | static int filename_len; |
| 1426 | char *temp; |
| 1427 | int dirlen; |
| 1428 | struct dirent *entry; |
| 1429 | |
| 1430 | /* If we don't have any state, then do some initialization. */ |
| 1431 | if (state == 0) |
| 1432 | { |
| 1433 | /* If we were interrupted before closing the directory or reading |
| 1434 | all of its contents, close it. */ |
| 1435 | if (directory) |
| 1436 | { |
| 1437 | closedir (directory); |
| 1438 | directory = (DIR *)NULL; |
| 1439 | } |
| 1440 | FREE (dirname); |
| 1441 | FREE (filename); |
| 1442 | FREE (users_dirname); |
| 1443 | |
| 1444 | filename = savestring (text); |
| 1445 | if (*text == 0) |
| 1446 | text = "."; |
| 1447 | dirname = savestring (text); |
| 1448 | |
| 1449 | temp = strrchr (dirname, '/'); |
| 1450 | |
| 1451 | if (temp) |
| 1452 | { |
| 1453 | strcpy (filename, ++temp); |
| 1454 | *temp = '\0'; |
| 1455 | } |
| 1456 | else |
| 1457 | { |
| 1458 | dirname[0] = '.'; |
| 1459 | dirname[1] = '\0'; |
| 1460 | } |
| 1461 | |
| 1462 | /* We aren't done yet. We also support the "~user" syntax. */ |
| 1463 | |
| 1464 | /* Save the version of the directory that the user typed. */ |
| 1465 | users_dirname = savestring (dirname); |
| 1466 | |
| 1467 | if (*dirname == '~') |
| 1468 | { |
| 1469 | temp = tilde_expand (dirname); |
| 1470 | free (dirname); |
| 1471 | dirname = temp; |
| 1472 | } |
| 1473 | |
| 1474 | if (rl_directory_completion_hook && (*rl_directory_completion_hook) (&dirname)) |
| 1475 | { |
| 1476 | free (users_dirname); |
| 1477 | users_dirname = savestring (dirname); |
| 1478 | } |
| 1479 | |
| 1480 | directory = opendir (dirname); |
| 1481 | filename_len = strlen (filename); |
| 1482 | |
| 1483 | rl_filename_completion_desired = 1; |
| 1484 | } |
| 1485 | |
| 1486 | /* At this point we should entertain the possibility of hacking wildcarded |
| 1487 | filenames, like /usr/man/man<WILD>/te<TAB>. If the directory name |
| 1488 | contains globbing characters, then build an array of directories, and |
| 1489 | then map over that list while completing. */ |
| 1490 | /* *** UNIMPLEMENTED *** */ |
| 1491 | |
| 1492 | /* Now that we have some state, we can read the directory. */ |
| 1493 | |
| 1494 | entry = (struct dirent *)NULL; |
| 1495 | while (directory && (entry = readdir (directory))) |
| 1496 | { |
| 1497 | /* Special case for no filename. |
| 1498 | All entries except "." and ".." match. */ |
| 1499 | if (filename_len == 0) |
| 1500 | { |
| 1501 | if (entry->d_name[0] != '.' || |
| 1502 | (entry->d_name[1] && |
| 1503 | (entry->d_name[1] != '.' || entry->d_name[2]))) |
| 1504 | break; |
| 1505 | } |
| 1506 | else |
| 1507 | { |
| 1508 | /* Otherwise, if these match up to the length of filename, then |
| 1509 | it is a match. */ |
| 1510 | if (_rl_completion_case_fold) |
| 1511 | { |
| 1512 | if ((_rl_to_lower (entry->d_name[0]) == _rl_to_lower (filename[0])) && |
| 1513 | (((int)D_NAMLEN (entry)) >= filename_len) && |
| 1514 | (_rl_strnicmp (filename, entry->d_name, filename_len) == 0)) |
| 1515 | break; |
| 1516 | } |
| 1517 | else |
| 1518 | { |
| 1519 | if ((entry->d_name[0] == filename[0]) && |
| 1520 | (((int)D_NAMLEN (entry)) >= filename_len) && |
| 1521 | (strncmp (filename, entry->d_name, filename_len) == 0)) |
| 1522 | break; |
| 1523 | } |
| 1524 | } |
| 1525 | } |
| 1526 | |
| 1527 | if (entry == 0) |
| 1528 | { |
| 1529 | if (directory) |
| 1530 | { |
| 1531 | closedir (directory); |
| 1532 | directory = (DIR *)NULL; |
| 1533 | } |
| 1534 | if (dirname) |
| 1535 | { |
| 1536 | free (dirname); |
| 1537 | dirname = (char *)NULL; |
| 1538 | } |
| 1539 | if (filename) |
| 1540 | { |
| 1541 | free (filename); |
| 1542 | filename = (char *)NULL; |
| 1543 | } |
| 1544 | if (users_dirname) |
| 1545 | { |
| 1546 | free (users_dirname); |
| 1547 | users_dirname = (char *)NULL; |
| 1548 | } |
| 1549 | |
| 1550 | return (char *)NULL; |
| 1551 | } |
| 1552 | else |
| 1553 | { |
| 1554 | /* dirname && (strcmp (dirname, ".") != 0) */ |
| 1555 | if (dirname && (dirname[0] != '.' || dirname[1])) |
| 1556 | { |
| 1557 | if (rl_complete_with_tilde_expansion && *users_dirname == '~') |
| 1558 | { |
| 1559 | dirlen = strlen (dirname); |
| 1560 | temp = xmalloc (2 + dirlen + D_NAMLEN (entry)); |
| 1561 | strcpy (temp, dirname); |
| 1562 | /* Canonicalization cuts off any final slash present. We |
| 1563 | may need to add it back. */ |
| 1564 | if (dirname[dirlen - 1] != '/') |
| 1565 | { |
| 1566 | temp[dirlen++] = '/'; |
| 1567 | temp[dirlen] = '\0'; |
| 1568 | } |
| 1569 | } |
| 1570 | else |
| 1571 | { |
| 1572 | dirlen = strlen (users_dirname); |
| 1573 | temp = xmalloc (1 + dirlen + D_NAMLEN (entry)); |
| 1574 | strcpy (temp, users_dirname); |
| 1575 | } |
| 1576 | |
| 1577 | strcpy (temp + dirlen, entry->d_name); /* strcat (temp, entry->d_name); */ |
| 1578 | } |
| 1579 | else |
| 1580 | temp = savestring (entry->d_name); |
| 1581 | |
| 1582 | return (temp); |
| 1583 | } |
| 1584 | } |
| 1585 | |
| 1586 | /* An initial implementation of a menu completion function a la tcsh. The |
| 1587 | first time (if the last readline command was not rl_menu_complete), we |
| 1588 | generate the list of matches. This code is very similar to the code in |
| 1589 | rl_complete_internal -- there should be a way to combine the two. Then, |
| 1590 | for each item in the list of matches, we insert the match in an undoable |
| 1591 | fashion, with the appropriate character appended (this happens on the |
| 1592 | second and subsequent consecutive calls to rl_menu_complete). When we |
| 1593 | hit the end of the match list, we restore the original unmatched text, |
| 1594 | ring the bell, and reset the counter to zero. */ |
| 1595 | int |
| 1596 | rl_menu_complete (count, ignore) |
| 1597 | int count, ignore; |
| 1598 | { |
| 1599 | Function *our_func; |
| 1600 | int matching_filenames, found_quote; |
| 1601 | |
| 1602 | static char *orig_text; |
| 1603 | static char **matches = (char **)0; |
| 1604 | static int match_list_index = 0; |
| 1605 | static int match_list_size = 0; |
| 1606 | static int orig_start, orig_end; |
| 1607 | static char quote_char; |
| 1608 | static int delimiter; |
| 1609 | |
| 1610 | /* The first time through, we generate the list of matches and set things |
| 1611 | up to insert them. */ |
| 1612 | if (rl_last_func != rl_menu_complete) |
| 1613 | { |
| 1614 | /* Clean up from previous call, if any. */ |
| 1615 | FREE (orig_text); |
| 1616 | if (matches) |
| 1617 | { |
| 1618 | for (match_list_index = 0; matches[match_list_index]; match_list_index++) |
| 1619 | free (matches[match_list_index]); |
| 1620 | free (matches); |
| 1621 | } |
| 1622 | |
| 1623 | match_list_index = match_list_size = 0; |
| 1624 | matches = (char **)NULL; |
| 1625 | |
| 1626 | /* Only the completion entry function can change these. */ |
| 1627 | rl_filename_completion_desired = 0; |
| 1628 | rl_filename_quoting_desired = 1; |
| 1629 | rl_completion_type = '%'; |
| 1630 | |
| 1631 | our_func = rl_completion_entry_function |
| 1632 | ? rl_completion_entry_function |
| 1633 | : (Function *)filename_completion_function; |
| 1634 | |
| 1635 | /* We now look backwards for the start of a filename/variable word. */ |
| 1636 | orig_end = rl_point; |
| 1637 | found_quote = delimiter = 0; |
| 1638 | quote_char = '\0'; |
| 1639 | |
| 1640 | if (rl_point) |
| 1641 | /* This (possibly) changes rl_point. If it returns a non-zero char, |
| 1642 | we know we have an open quote. */ |
| 1643 | quote_char = find_completion_word (&found_quote, &delimiter); |
| 1644 | |
| 1645 | orig_start = rl_point; |
| 1646 | rl_point = orig_end; |
| 1647 | |
| 1648 | orig_text = rl_copy_text (orig_start, orig_end); |
| 1649 | matches = gen_completion_matches (orig_text, orig_start, orig_end, |
| 1650 | our_func, found_quote, quote_char); |
| 1651 | |
| 1652 | /* If we are matching filenames, our_func will have been set to |
| 1653 | filename_completion_function */ |
| 1654 | matching_filenames = our_func == (Function *)filename_completion_function; |
| 1655 | if (matches == 0 || postprocess_matches (orig_text, &matches, matching_filenames) == 0) |
| 1656 | { |
| 1657 | ding (); |
| 1658 | FREE (matches); |
| 1659 | matches = (char **)0; |
| 1660 | FREE (orig_text); |
| 1661 | orig_text = (char *)0; |
| 1662 | completion_changed_buffer = 0; |
| 1663 | return (0); |
| 1664 | } |
| 1665 | |
| 1666 | for (match_list_size = 0; matches[match_list_size]; match_list_size++) |
| 1667 | ; |
| 1668 | /* matches[0] is lcd if match_list_size > 1, but the circular buffer |
| 1669 | code below should take care of it. */ |
| 1670 | } |
| 1671 | |
| 1672 | /* Now we have the list of matches. Replace the text between |
| 1673 | rl_line_buffer[orig_start] and rl_line_buffer[rl_point] with |
| 1674 | matches[match_list_index], and add any necessary closing char. */ |
| 1675 | |
| 1676 | if (matches == 0 || match_list_size == 0) |
| 1677 | { |
| 1678 | ding (); |
| 1679 | FREE (matches); |
| 1680 | matches = (char **)0; |
| 1681 | completion_changed_buffer = 0; |
| 1682 | return (0); |
| 1683 | } |
| 1684 | |
| 1685 | match_list_index = (match_list_index + count) % match_list_size; |
| 1686 | if (match_list_index < 0) |
| 1687 | match_list_index += match_list_size; |
| 1688 | |
| 1689 | if (match_list_index == 0) |
| 1690 | { |
| 1691 | ding (); |
| 1692 | insert_match (orig_text, orig_start, MULT_MATCH, "e_char); |
| 1693 | } |
| 1694 | else |
| 1695 | { |
| 1696 | insert_match (matches[match_list_index], orig_start, SINGLE_MATCH, "e_char); |
| 1697 | append_to_match (matches[match_list_index], delimiter, quote_char); |
| 1698 | } |
| 1699 | |
| 1700 | completion_changed_buffer = 1; |
| 1701 | return (0); |
| 1702 | } |