diff options
Diffstat (limited to 'complete.c')
| -rw-r--r-- | complete.c | 1417 |
1 files changed, 1417 insertions, 0 deletions
diff --git a/complete.c b/complete.c new file mode 100644 index 0000000..2180132 --- /dev/null +++ b/complete.c @@ -0,0 +1,1417 @@ +/* complete.c -- filename completion for readline. */ + +/* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc. + + This file is part of the GNU Readline Library, a library for + reading lines of text with interactive input and history editing. + + The GNU Readline Library is free software; you can redistribute it + and/or modify it under the terms of the GNU General Public License + as published by the Free Software Foundation; either version 1, or + (at your option) any later version. + + The GNU Readline Library is distributed in the hope that it will be + useful, but WITHOUT ANY WARRANTY; without even the implied warranty + of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + The GNU General Public License is often shipped with GNU software, and + is generally kept in a file called COPYING or LICENSE. If you do not + have a copy of the license, write to the Free Software Foundation, + 675 Mass Ave, Cambridge, MA 02139, USA. */ +#define READLINE_LIBRARY + +#include <stdio.h> +#include <sys/types.h> +#include <fcntl.h> +#if !defined (NO_SYS_FILE) +# include <sys/file.h> +#endif /* !NO_SYS_FILE */ + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif /* HAVE_UNISTD_H */ + +#if defined (HAVE_STDLIB_H) +# include <stdlib.h> +#else +# include "ansi_stdlib.h" +#endif /* HAVE_STDLIB_H */ + +#include <errno.h> +/* Not all systems declare ERRNO in errno.h... and some systems #define it! */ +#if !defined (errno) +extern int errno; +#endif /* !errno */ + +#include <pwd.h> +#if defined (USG) && !defined (HAVE_GETPW_DECLS) +extern struct passwd *getpwent (); +#endif /* USG && !HAVE_GETPW_DECLS */ + +/* ISC systems don't define getpwent() if _POSIX_SOURCE is defined. */ +#if defined (isc386) && defined (_POSIX_SOURCE) +# if defined (__STDC__) +extern struct passwd *getpwent (void); +# else +extern struct passwd *getpwent (); +# endif /* !__STDC__ */ +#endif /* isc386 && _POSIX_SOURCE */ + +#include "posixstat.h" + +/* System-specific feature definitions and include files. */ +#include "rldefs.h" + +/* Some standard library routines. */ +#include "readline.h" + +/* Possible values for do_replace in rl_complete_internal. */ +#define NO_MATCH 0 +#define SINGLE_MATCH 1 +#define MULT_MATCH 2 + +#if !defined (strchr) && !defined (__STDC__) +extern char *strchr (), *strrchr (); +#endif /* !strchr && !__STDC__ */ + +extern char *tilde_expand (); +extern char *rl_copy_text (); + +extern Function *rl_last_func; +extern int rl_editing_mode; +extern int screenwidth; + +/* Forward declarations for functions defined and used in this file. */ +char *filename_completion_function (); +char **completion_matches (); + +static int compare_strings (); +static char *rl_strpbrk (); + +#if defined (STATIC_MALLOC) +static char *xmalloc (), *xrealloc (); +#else +extern char *xmalloc (), *xrealloc (); +#endif /* STATIC_MALLOC */ + +/* If non-zero, then this is the address of a function to call when + completing on a directory name. The function is called with + the address of a string (the current directory name) as an arg. */ +Function *rl_directory_completion_hook = (Function *)NULL; + +/* Non-zero means readline completion functions perform tilde expansion. */ +int rl_complete_with_tilde_expansion = 0; + +/* If non-zero, non-unique completions always show the list of matches. */ +int _rl_complete_show_all = 0; + +#if defined (VISIBLE_STATS) +# if !defined (X_OK) +# define X_OK 1 +# endif + +static int stat_char (); + +/* Non-zero means add an additional character to each filename displayed + during listing completion iff rl_filename_completion_desired which helps + to indicate the type of file being listed. */ +int rl_visible_stats = 0; +#endif /* VISIBLE_STATS */ + +/* **************************************************************** */ +/* */ +/* Completion matching, from readline's point of view. */ +/* */ +/* **************************************************************** */ + +/* Pointer to the generator function for completion_matches (). + NULL means to use filename_entry_function (), the default filename + completer. */ +Function *rl_completion_entry_function = (Function *)NULL; + +/* Pointer to alternative function to create matches. + Function is called with TEXT, START, and END. + START and END are indices in RL_LINE_BUFFER saying what the boundaries + of TEXT are. + If this function exists and returns NULL then call the value of + rl_completion_entry_function to try to match, otherwise use the + array of strings returned. */ +CPPFunction *rl_attempted_completion_function = (CPPFunction *)NULL; + +/* Non-zero means to suppress normal filename completion after the + user-specified completion function has been called. */ +int rl_attempted_completion_over = 0; + +/* Local variable states what happened during the last completion attempt. */ +static int completion_changed_buffer = 0; + +/* Complete the word at or before point. You have supplied the function + that does the initial simple matching selection algorithm (see + completion_matches ()). The default is to do filename completion. */ + +rl_complete (ignore, invoking_key) + int ignore, invoking_key; +{ + if (rl_last_func == rl_complete && !completion_changed_buffer) + return (rl_complete_internal ('?')); + else if (_rl_complete_show_all) + return (rl_complete_internal ('!')); + else + return (rl_complete_internal (TAB)); +} + +/* List the possible completions. See description of rl_complete (). */ +rl_possible_completions (ignore, invoking_key) + int ignore, invoking_key; +{ + return (rl_complete_internal ('?')); +} + +rl_insert_completions (ignore, invoking_key) + int ignore, invoking_key; +{ + return (rl_complete_internal ('*')); +} + +/* The user must press "y" or "n". Non-zero return means "y" pressed. */ +get_y_or_n () +{ + int c; + + for (;;) + { + c = rl_read_key (); + if (c == 'y' || c == 'Y' || c == ' ') + return (1); + if (c == 'n' || c == 'N' || c == RUBOUT) + return (0); + if (c == ABORT_CHAR) + rl_abort (); + ding (); + } +} + +/* Up to this many items will be displayed in response to a + possible-completions call. After that, we ask the user if + she is sure she wants to see them all. */ +int rl_completion_query_items = 100; + +/* The basic list of characters that signal a break between words for the + completer routine. The contents of this variable is what breaks words + in the shell, i.e. " \t\n\"\\'`@$><=" */ +char *rl_basic_word_break_characters = " \t\n\"\\'`@$><=;|&{("; + +/* The list of characters that signal a break between words for + rl_complete_internal. The default list is the contents of + rl_basic_word_break_characters. */ +char *rl_completer_word_break_characters = (char *)NULL; + +/* List of characters which can be used to quote a substring of the line. + Completion occurs on the entire substring, and within the substring + rl_completer_word_break_characters are treated as any other character, + unless they also appear within this list. */ +char *rl_completer_quote_characters = (char *)NULL; + +/* List of characters that are word break characters, but should be left + in TEXT when it is passed to the completion function. The shell uses + this to help determine what kind of completing to do. */ +char *rl_special_prefixes = (char *)NULL; + +/* If non-zero, then disallow duplicates in the matches. */ +int rl_ignore_completion_duplicates = 1; + +/* Non-zero means that the results of the matches are to be treated + as filenames. This is ALWAYS zero on entry, and can only be changed + within a completion entry finder function. */ +int rl_filename_completion_desired = 0; + +/* Non-zero means that the results of the matches are to be quoted using + double quotes (or an application-specific quoting mechanism) if the + filename contains any characters in rl_word_break_chars. This is + ALWAYS non-zero on entry, and can only be changed within a completion + entry finder function. */ +int rl_filename_quoting_desired = 1; + +/* This function, if defined, is called by the completer when real + filename completion is done, after all the matching names have been + generated. It is passed a (char**) known as matches in the code below. + It consists of a NULL-terminated array of pointers to potential + matching strings. The 1st element (matches[0]) is the maximal + substring that is common to all matches. This function can re-arrange + the list of matches as required, but all elements of the array must be + free()'d if they are deleted. The main intent of this function is + to implement FIGNORE a la SunOS csh. */ +Function *rl_ignore_some_completions_function = (Function *)NULL; + +#if defined (SHELL) +/* A function to strip quotes that are not protected by backquotes. It + allows single quotes to appear within double quotes, and vice versa. + It should be smarter. It's fairly shell-specific, hence the SHELL + definition wrapper. */ +static char * +_delete_quotes (text) + char *text; +{ + char *ret, *p, *r; + int l, quoted; + + l = strlen (text); + ret = xmalloc (l + 1); + for (quoted = 0, p = text, r = ret; p && *p; p++) + { + /* Allow backslash-quoted characters to pass through unscathed. */ + if (*p == '\\') + continue; + /* Close quote. */ + if (quoted && *p == quoted) + { + quoted = 0; + continue; + } + /* Open quote. */ + if (quoted == 0 && (*p == '\'' || *p == '"')) + { + quoted = *p; + continue; + } + *r++ = *p; + } + *r = '\0'; + return ret; +} +#endif /* SHELL */ + +/* Return the portion of PATHNAME that should be output when listing + possible completions. If we are hacking filename completion, we + are only interested in the basename, the portion following the + final slash. Otherwise, we return what we were passed. */ +static char * +printable_part (pathname) + char *pathname; +{ + char *temp = (char *)NULL; + + if (rl_filename_completion_desired) + temp = strrchr (pathname, '/'); + + if (!temp) + return (pathname); + else + return (++temp); +} + +/* Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and we + are using it, check for and output a single character for `special' + filenames. Return 1 if we printed an extension character, 0 if not. */ +static int +print_filename (to_print, full_pathname) + char *to_print, *full_pathname; +{ +#if !defined (VISIBLE_STATS) + fputs (to_print, rl_outstream); + return 0; +#else + char *s, c, *new_full_pathname; + int extension_char = 0, slen, tlen; + + fputs (to_print, rl_outstream); + if (rl_filename_completion_desired && rl_visible_stats) + { + /* If to_print != full_pathname, to_print is the basename of the + path passed. In this case, we try to expand the directory + name before checking for the stat character. */ + if (to_print != full_pathname) + { + /* Terminate the directory name. */ + c = to_print[-1]; + to_print[-1] = '\0'; + + s = tilde_expand (full_pathname); + if (rl_directory_completion_hook) + (*rl_directory_completion_hook) (&s); + + slen = strlen (s); + tlen = strlen (to_print); + new_full_pathname = xmalloc (slen + tlen + 2); + strcpy (new_full_pathname, s); + new_full_pathname[slen] = '/'; + strcpy (new_full_pathname + slen + 1, to_print); + + extension_char = stat_char (new_full_pathname); + + free (new_full_pathname); + to_print[-1] = c; + } + else + { + s = tilde_expand (full_pathname); + extension_char = stat_char (s); + } + + free (s); + if (extension_char) + putc (extension_char, rl_outstream); + return (extension_char != 0); + } + else + return 0; +#endif /* VISIBLE_STATS */ +} + +/* Complete the word at or before point. + WHAT_TO_DO says what to do with the completion. + `?' means list the possible completions. + TAB means do standard completion. + `*' means insert all of the possible completions. + `!' means to do standard completion, and list all possible completions if + there is more than one. */ +rl_complete_internal (what_to_do) + int what_to_do; +{ + char **matches; + Function *our_func; + int start, scan, end, delimiter = 0, pass_next; + char *text, *saved_line_buffer; + char *replacement; + char quote_char = '\0'; + int found_quote = 0; + + if (rl_line_buffer) + saved_line_buffer = savestring (rl_line_buffer); + else + saved_line_buffer = (char *)NULL; + + if (rl_completion_entry_function) + our_func = rl_completion_entry_function; + else + our_func = (Function *)filename_completion_function; + + /* Only the completion entry function can change these. */ + rl_filename_completion_desired = 0; + rl_filename_quoting_desired = 1; + + /* We now look backwards for the start of a filename/variable word. */ + end = rl_point; + + if (rl_point) + { + if (rl_completer_quote_characters) + { + /* We have a list of characters which can be used in pairs to + quote substrings for the completer. Try to find the start + of an unclosed quoted substring. */ + /* FOUND_QUOTE is set so we know what kind of quotes we found. */ + for (scan = pass_next = 0; scan < end; scan++) + { + if (pass_next) + { + pass_next = 0; + continue; + } + + if (rl_line_buffer[scan] == '\\') + { + pass_next = 1; + found_quote |= 4; + continue; + } + + if (quote_char != '\0') + { + /* Ignore everything until the matching close quote char. */ + if (rl_line_buffer[scan] == quote_char) + { + /* Found matching close. Abandon this substring. */ + quote_char = '\0'; + rl_point = end; + } + } + else if (strchr (rl_completer_quote_characters, rl_line_buffer[scan])) + { + /* Found start of a quoted substring. */ + quote_char = rl_line_buffer[scan]; + rl_point = scan + 1; + /* Shell-like quoting conventions. */ + if (quote_char == '\'') + found_quote |= 1; + else if (quote_char == '"') + found_quote |= 2; + } + } + } + + if (rl_point == end) + { + int quoted = 0; + /* We didn't find an unclosed quoted substring upon which to do + completion, so use the word break characters to find the + substring on which to complete. */ + while (--rl_point) + { + scan = rl_line_buffer[rl_point]; + + if (strchr (rl_completer_word_break_characters, scan) == 0) + continue; + +#if defined (SHELL) + /* Don't let word break characters in quoted substrings break + words for the completer. */ + if (found_quote && char_is_quoted (rl_line_buffer, rl_point)) + continue; +#endif /* SHELL */ + + /* Convoluted code, but it avoids an n^2 algorithm with calls + to char_is_quoted. */ + break; + } + } + + /* If we are at an unquoted word break, then advance past it. */ + scan = rl_line_buffer[rl_point]; +#if defined (SHELL) + if ((found_quote == 0 || char_is_quoted (rl_line_buffer, rl_point) == 0) && + strchr (rl_completer_word_break_characters, scan)) +#else + if (strchr (rl_completer_word_break_characters, scan)) +#endif + { + /* If the character that caused the word break was a quoting + character, then remember it as the delimiter. */ + if (strchr ("\"'", scan) && (end - rl_point) > 1) + delimiter = scan; + + /* If the character isn't needed to determine something special + about what kind of completion to perform, then advance past it. */ + if (!rl_special_prefixes || strchr (rl_special_prefixes, scan) == 0) + rl_point++; + } + } + + /* At this point, we know we have an open quote if quote_char != '\0'. */ + start = rl_point; + rl_point = end; + text = rl_copy_text (start, end); + + /* If the user wants to TRY to complete, but then wants to give + up and use the default completion function, they set the + variable rl_attempted_completion_function. */ + if (rl_attempted_completion_function) + { + matches = (*rl_attempted_completion_function) (text, start, end); + + if (matches || rl_attempted_completion_over) + { + rl_attempted_completion_over = 0; + our_func = (Function *)NULL; + goto after_usual_completion; + } + } + +#if defined (SHELL) + /* Beware -- we're stripping the quotes here. Do this only if we know + we are doing filename completion. */ + if (found_quote && our_func == (Function *)filename_completion_function) + { + /* delete single and double quotes */ + replacement = _delete_quotes (text); + free (text); + text = replacement; + replacement = (char *)0; + } +#endif /* SHELL */ + + matches = completion_matches (text, our_func); + + after_usual_completion: + free (text); + + if (!matches) + ding (); + else + { + register int i; + int should_quote; + + /* It seems to me that in all the cases we handle we would like + to ignore duplicate possiblilities. Scan for the text to + insert being identical to the other completions. */ + if (rl_ignore_completion_duplicates) + { + char *lowest_common; + int j, newlen = 0; + char dead_slot; + char **temp_array; + + /* Sort the items. */ + /* It is safe to sort this array, because the lowest common + denominator found in matches[0] will remain in place. */ + for (i = 0; matches[i]; i++); + qsort (matches, i, sizeof (char *), compare_strings); + + /* Remember the lowest common denominator for it may be unique. */ + lowest_common = savestring (matches[0]); + + for (i = 0; matches[i + 1]; i++) + { + if (strcmp (matches[i], matches[i + 1]) == 0) + { + free (matches[i]); + matches[i] = (char *)&dead_slot; + } + else + newlen++; + } + + /* We have marked all the dead slots with (char *)&dead_slot. + Copy all the non-dead entries into a new array. */ + temp_array = (char **)xmalloc ((3 + newlen) * sizeof (char *)); + for (i = j = 1; matches[i]; i++) + { + if (matches[i] != (char *)&dead_slot) + temp_array[j++] = matches[i]; + } + temp_array[j] = (char *)NULL; + + if (matches[0] != (char *)&dead_slot) + free (matches[0]); + free (matches); + + matches = temp_array; + + /* Place the lowest common denominator back in [0]. */ + matches[0] = lowest_common; + + /* If there is one string left, and it is identical to the + lowest common denominator, then the LCD is the string to + insert. */ + if (j == 2 && strcmp (matches[0], matches[1]) == 0) + { + free (matches[1]); + matches[1] = (char *)NULL; + } + } + + switch (what_to_do) + { + case TAB: + case '!': + /* If we are matching filenames, then here is our chance to + do clever processing by re-examining the list. Call the + ignore function with the array as a parameter. It can + munge the array, deleting matches as it desires. */ + if (rl_ignore_some_completions_function && + our_func == (Function *)filename_completion_function) + (void)(*rl_ignore_some_completions_function)(matches); + + /* If we are doing completion on quoted substrings, and any matches + contain any of the completer_word_break_characters, then auto- + matically prepend the substring with a quote character (just pick + the first one from the list of such) if it does not already begin + with a quote string. FIXME: Need to remove any such automatically + inserted quote character when it no longer is necessary, such as + if we change the string we are completing on and the new set of + matches don't require a quoted substring. */ + replacement = matches[0]; + + should_quote = matches[0] && rl_completer_quote_characters && + rl_filename_completion_desired && + rl_filename_quoting_desired; + + if (should_quote) +#if defined (SHELL) + should_quote = should_quote && (!quote_char || quote_char == '"'); +#else + should_quote = should_quote && !quote_char; +#endif + + if (should_quote) + { + int do_replace; + + do_replace = NO_MATCH; + + /* If there is a single match, see if we need to quote it. + This also checks whether the common prefix of several + matches needs to be quoted. If the common prefix should + not be checked, add !matches[1] to the if clause. */ + should_quote = rl_strpbrk (matches[0], rl_completer_word_break_characters) != 0; +#if defined (SHELL) + should_quote = should_quote || rl_strpbrk (matches[0], "#$`") != 0; +#endif + + if (should_quote) + do_replace = matches[1] ? MULT_MATCH : SINGLE_MATCH; + + if (do_replace != NO_MATCH) + { +#if defined (SHELL) + /* Quote the replacement, since we found an + embedded word break character in a potential + match. */ + char *rtext, *mtext; + int rlen; + extern char *double_quote (); /* in builtins/common.c */ + + /* If DO_REPLACE == MULT_MATCH, it means that there is + more than one match. In this case, we do not add + the closing quote or attempt to perform tilde + expansion. If DO_REPLACE == SINGLE_MATCH, we try + to perform tilde expansion, because double quotes + inhibit tilde expansion by the shell. */ + + mtext = matches[0]; + if (mtext[0] == '~' && do_replace == SINGLE_MATCH) + mtext = tilde_expand (matches[0]); + rtext = double_quote (mtext); + if (mtext != matches[0]) + free (mtext); + + rlen = strlen (rtext); + replacement = xmalloc (rlen + 1); + /* If we're completing on a quoted string where the user + has already supplied the opening quote, we don't want + the quote in the replacement text, and we reset + QUOTE_CHAR to 0 to avoid an extra closing quote. */ + if (quote_char == '"') + { + strcpy (replacement, rtext + 1); + rlen--; + quote_char = 0; + } + else + strcpy (replacement, rtext); + if (do_replace == MULT_MATCH) + replacement[rlen - 1] = '\0'; + free (rtext); +#else /* !SHELL */ + /* Found an embedded word break character in a potential + match, so we need to prepend a quote character if we + are replacing the completion string. */ + replacement = xmalloc (strlen (matches[0]) + 2); + quote_char = *rl_completer_quote_characters; + *replacement = quote_char; + strcpy (replacement + 1, matches[0]); +#endif /* SHELL */ + } + } + + if (replacement) + { + rl_begin_undo_group (); + rl_delete_text (start, rl_point); + rl_point = start; + rl_insert_text (replacement); + rl_end_undo_group (); + if (replacement != matches[0]) + free (replacement); + } + + /* If there are more matches, ring the bell to indicate. + If this was the only match, and we are hacking files, + check the file to see if it was a directory. If so, + add a '/' to the name. If not, and we are at the end + of the line, then add a space. */ + if (matches[1]) + { + if (what_to_do == '!') + goto display_matches; /* XXX */ + else if (rl_editing_mode != vi_mode) + ding (); /* There are other matches remaining. */ + } + else + { + char temp_string[4]; + int temp_string_index = 0; + + if (quote_char) + temp_string[temp_string_index++] = quote_char; + + temp_string[temp_string_index++] = delimiter ? delimiter : ' '; + temp_string[temp_string_index++] = '\0'; + + if (rl_filename_completion_desired) + { + struct stat finfo; + char *filename = tilde_expand (matches[0]); + + if ((stat (filename, &finfo) == 0) && S_ISDIR (finfo.st_mode)) + { + if (rl_line_buffer[rl_point] != '/') + rl_insert_text ("/"); + } + else + { + if (rl_point == rl_end) + rl_insert_text (temp_string); + } + free (filename); + } + else + { + if (rl_point == rl_end) + rl_insert_text (temp_string); + } + } + break; + + case '*': + { + int i = 1; + + rl_begin_undo_group (); + rl_delete_text (start, rl_point); + rl_point = start; + if (matches[1]) + { + while (matches[i]) + { + rl_insert_text (matches[i++]); + rl_insert_text (" "); + } + } + else + { + rl_insert_text (matches[0]); + rl_insert_text (" "); + } + rl_end_undo_group (); + } + break; + + case '?': + { + int len, count, limit, max; + int j, k, l; + + /* Handle simple case first. What if there is only one answer? */ + if (!matches[1]) + { + char *temp; + + temp = printable_part (matches[0]); + crlf (); + print_filename (temp, matches[0]); + crlf (); + goto restart; + } + + /* There is more than one answer. Find out how many there are, + and find out what the maximum printed length of a single entry + is. */ + display_matches: + for (max = 0, i = 1; matches[i]; i++) + { + char *temp; + int name_length; + + temp = printable_part (matches[i]); + name_length = strlen (temp); + + if (name_length > max) + max = name_length; + } + + len = i - 1; + + /* If there are many items, then ask the user if she + really wants to see them all. */ + if (len >= rl_completion_query_items) + { + crlf (); + fprintf (rl_outstream, + "There are %d possibilities. Do you really", len); + crlf (); + fprintf (rl_outstream, "wish to see them all? (y or n)"); + fflush (rl_outstream); + if (!get_y_or_n ()) + { + crlf (); + goto restart; + } + } + + /* How many items of MAX length can we fit in the screen window? */ + max += 2; + limit = screenwidth / max; + if (limit != 1 && (limit * max == screenwidth)) + limit--; + + /* Avoid a possible floating exception. If max > screenwidth, + limit will be 0 and a divide-by-zero fault will result. */ + if (limit == 0) + limit = 1; + + /* How many iterations of the printing loop? */ + count = (len + (limit - 1)) / limit; + + /* Watch out for special case. If LEN is less than LIMIT, then + just do the inner printing loop. */ + if (len < limit) + count = 1; + + /* Sort the items if they are not already sorted. */ + if (!rl_ignore_completion_duplicates) + qsort (matches, len, sizeof (char *), compare_strings); + + /* Print the sorted items, up-and-down alphabetically, like + ls might. */ + crlf (); + + for (i = 1; i < count + 1; i++) + { + for (j = 0, l = i; j < limit; j++) + { + if (l > len || !matches[l]) + break; + else + { + char *temp; + int printed_length; + + temp = printable_part (matches[l]); + printed_length = strlen (temp); + printed_length += print_filename (temp, matches[l]); + + if (j + 1 < limit) + { + for (k = 0; k < max - printed_length; k++) + putc (' ', rl_outstream); + } + } + l += count; + } + crlf (); + } + restart: + + rl_on_new_line (); + } + break; + + default: + fprintf (stderr, "\r\nreadline: bad value for what_to_do in rl_complete\n"); + abort (); + } + + for (i = 0; matches[i]; i++) + free (matches[i]); + free (matches); + } + + /* Check to see if the line has changed through all of this manipulation. */ + if (saved_line_buffer) + { + if (strcmp (rl_line_buffer, saved_line_buffer) != 0) + completion_changed_buffer = 1; + else + completion_changed_buffer = 0; + + free (saved_line_buffer); + } + return 0; +} + +#if defined (VISIBLE_STATS) +/* Return the character which best describes FILENAME. + `@' for symbolic links + `/' for directories + `*' for executables + `=' for sockets */ +static int +stat_char (filename) + char *filename; +{ + struct stat finfo; + int character, r; + +#if defined (S_ISLNK) + r = lstat (filename, &finfo); +#else + r = stat (filename, &finfo); +#endif + + if (r == -1) + return (0); + + character = 0; + if (S_ISDIR (finfo.st_mode)) + character = '/'; +#if defined (S_ISLNK) + else if (S_ISLNK (finfo.st_mode)) + character = '@'; +#endif /* S_ISLNK */ +#if defined (S_ISSOCK) + else if (S_ISSOCK (finfo.st_mode)) + character = '='; +#endif /* S_ISSOCK */ + else if (S_ISREG (finfo.st_mode)) + { + if (access (filename, X_OK) == 0) + character = '*'; + } + return (character); +} +#endif /* VISIBLE_STATS */ + +/* Stupid comparison routine for qsort () ing strings. */ +static int +compare_strings (s1, s2) + char **s1, **s2; +{ + int result; + + result = **s1 - **s2; + if (result == 0) + result = strcmp (*s1, *s2); + + return result; +} + +/* A completion function for usernames. + TEXT contains a partial username preceded by a random + character (usually `~'). */ +char * +username_completion_function (text, state) + int state; + char *text; +{ +#if defined (__GO32__) + return (char *)NULL; +#else /* !__GO32__ */ + static char *username = (char *)NULL; + static struct passwd *entry; + static int namelen, first_char, first_char_loc; + + if (!state) + { + if (username) + free (username); + + first_char = *text; + + if (first_char == '~') + first_char_loc = 1; + else + first_char_loc = 0; + + username = savestring (&text[first_char_loc]); + namelen = strlen (username); + setpwent (); + } + + while (entry = getpwent ()) + { + if ((username[0] == entry->pw_name[0]) && + (strncmp (username, entry->pw_name, namelen) == 0)) + break; + } + + if (!entry) + { + endpwent (); + return ((char *)NULL); + } + else + { + char *value = xmalloc (2 + strlen (entry->pw_name)); + + *value = *text; + + strcpy (value + first_char_loc, entry->pw_name); + + if (first_char == '~') + rl_filename_completion_desired = 1; + + return (value); + } +#endif /* !__GO32__ */ +} + +/* **************************************************************** */ +/* */ +/* Completion */ +/* */ +/* **************************************************************** */ + +/* Non-zero means that case is not significant in completion. */ +int completion_case_fold = 0; + +/* Return an array of (char *) which is a list of completions for TEXT. + If there are no completions, return a NULL pointer. + The first entry in the returned array is the substitution for TEXT. + The remaining entries are the possible completions. + The array is terminated with a NULL pointer. + + ENTRY_FUNCTION is a function of two args, and returns a (char *). + The first argument is TEXT. + The second is a state argument; it should be zero on the first call, and + non-zero on subsequent calls. It returns a NULL pointer to the caller + when there are no more matches. + */ +char ** +completion_matches (text, entry_function) + char *text; + CPFunction *entry_function; +{ + /* Number of slots in match_list. */ + int match_list_size; + + /* The list of matches. */ + char **match_list = + (char **)xmalloc (((match_list_size = 10) + 1) * sizeof (char *)); + + /* Number of matches actually found. */ + int matches = 0; + + /* Temporary string binder. */ + char *string; + + match_list[1] = (char *)NULL; + + while (string = (*entry_function) (text, matches)) + { + if (matches + 1 == match_list_size) + match_list = (char **)xrealloc + (match_list, ((match_list_size += 10) + 1) * sizeof (char *)); + + match_list[++matches] = string; + match_list[matches + 1] = (char *)NULL; + } + + /* If there were any matches, then look through them finding out the + lowest common denominator. That then becomes match_list[0]. */ + if (matches) + { + register int i = 1; + int low = 100000; /* Count of max-matched characters. */ + + /* If only one match, just use that. */ + if (matches == 1) + { + match_list[0] = match_list[1]; + match_list[1] = (char *)NULL; + } + else + { + /* Otherwise, compare each member of the list with + the next, finding out where they stop matching. */ + + while (i < matches) + { + register int c1, c2, si; + + if (completion_case_fold) + { + for (si = 0; + (c1 = to_lower(match_list[i][si])) && + (c2 = to_lower(match_list[i + 1][si])); + si++) + if (c1 != c2) break; + } + else + { + for (si = 0; + (c1 = match_list[i][si]) && + (c2 = match_list[i + 1][si]); + si++) + if (c1 != c2) break; + } + + if (low > si) low = si; + i++; + } + match_list[0] = xmalloc (low + 1); + strncpy (match_list[0], match_list[1], low); + match_list[0][low] = '\0'; + } + } + else /* There were no matches. */ + { + free (match_list); + match_list = (char **)NULL; + } + return (match_list); +} + +/* Okay, now we write the entry_function for filename completion. In the + general case. Note that completion in the shell is a little different + because of all the pathnames that must be followed when looking up the + completion for a command. */ +char * +filename_completion_function (text, state) + int state; + char *text; +{ + static DIR *directory; + static char *filename = (char *)NULL; + static char *dirname = (char *)NULL; + static char *users_dirname = (char *)NULL; + static int filename_len; + + struct dirent *entry = (struct dirent *)NULL; + + /* If we don't have any state, then do some initialization. */ + if (!state) + { + char *temp; + + if (dirname) free (dirname); + if (filename) free (filename); + if (users_dirname) free (users_dirname); + + filename = savestring (text); + if (!*text) text = "."; + dirname = savestring (text); + + temp = strrchr (dirname, '/'); + + if (temp) + { + strcpy (filename, ++temp); + *temp = '\0'; + } + else + strcpy (dirname, "."); + + /* We aren't done yet. We also support the "~user" syntax. */ + + /* Save the version of the directory that the user typed. */ + users_dirname = savestring (dirname); + { + char *temp_dirname; + int replace_dirname; + + temp_dirname = tilde_expand (dirname); + free (dirname); + dirname = temp_dirname; + + replace_dirname = 0; + if (rl_directory_completion_hook) + replace_dirname = (*rl_directory_completion_hook) (&dirname); + if (replace_dirname) + { + free (users_dirname); + users_dirname = savestring (dirname); + } + } + directory = opendir (dirname); + filename_len = strlen (filename); + + rl_filename_completion_desired = 1; + } + + /* At this point we should entertain the possibility of hacking wildcarded + filenames, like /usr/man/man<WILD>/te<TAB>. If the directory name + contains globbing characters, then build an array of directories, and + then map over that list while completing. */ + /* *** UNIMPLEMENTED *** */ + + /* Now that we have some state, we can read the directory. */ + + while (directory && (entry = readdir (directory))) + { + /* Special case for no filename. + All entries except "." and ".." match. */ + if (!filename_len) + { + if ((strcmp (entry->d_name, ".") != 0) && + (strcmp (entry->d_name, "..") != 0)) + break; + } + else + { + /* Otherwise, if these match up to the length of filename, then + it is a match. */ + if ((entry->d_name[0] == filename[0]) && + (((int)D_NAMLEN (entry)) >= filename_len) && + (strncmp (filename, entry->d_name, filename_len) == 0)) + break; + } + } + + if (!entry) + { + if (directory) + { + closedir (directory); + directory = (DIR *)NULL; + } + if (dirname) + { + free (dirname); + dirname = (char *)NULL; + } + if (filename) + { + free (filename); + filename = (char *)NULL; + } + if (users_dirname) + { + free (users_dirname); + users_dirname = (char *)NULL; + } + + return (char *)NULL; + } + else + { + char *temp; + + /* dirname && (strcmp (dirname, ".") != 0) */ + if (dirname && (dirname[0] != '.' || dirname[1])) + { + if (rl_complete_with_tilde_expansion && *users_dirname == '~') + { + int dirlen = strlen (dirname); + temp = xmalloc (2 + dirlen + D_NAMLEN (entry)); + strcpy (temp, dirname); + /* Canonicalization cuts off any final slash present. We need + to add it back. */ + if (dirname[dirlen - 1] != '/') + { + temp[dirlen] = '/'; + temp[dirlen + 1] = '\0'; + } + } + else + { + temp = xmalloc (1 + strlen (users_dirname) + D_NAMLEN (entry)); + strcpy (temp, users_dirname); + } + + strcat (temp, entry->d_name); + } + else + temp = (savestring (entry->d_name)); + + return (temp); + } +} + +/* A function for simple tilde expansion. */ +int +rl_tilde_expand (ignore, key) + int ignore, key; +{ + register int start, end; + char *homedir; + + end = rl_point; + start = end - 1; + + if (rl_point == rl_end && rl_line_buffer[rl_point] == '~') + { + homedir = tilde_expand ("~"); + goto insert; + } + else if (rl_line_buffer[start] != '~') + { + for (; !whitespace (rl_line_buffer[start]) && start >= 0; start--); + start++; + } + + end = start; + do + { + end++; + } + while (!whitespace (rl_line_buffer[end]) && end < rl_end); + + if (whitespace (rl_line_buffer[end]) || end >= rl_end) + end--; + + /* If the first character of the current word is a tilde, perform + tilde expansion and insert the result. If not a tilde, do + nothing. */ + if (rl_line_buffer[start] == '~') + { + char *temp; + int len; + + len = end - start + 1; + temp = xmalloc (len + 1); + strncpy (temp, rl_line_buffer + start, len); + temp[len] = '\0'; + homedir = tilde_expand (temp); + free (temp); + + insert: + rl_begin_undo_group (); + rl_delete_text (start, end + 1); + rl_point = start; + rl_insert_text (homedir); + rl_end_undo_group (); + } + + return (0); +} + +/* Find the first occurrence in STRING1 of any character from STRING2. + Return a pointer to the character in STRING1. */ +static char * +rl_strpbrk (string1, string2) + char *string1, *string2; +{ + register char *scan; + + for (; *string1; string1++) + { + for (scan = string2; *scan; scan++) + { + if (*string1 == *scan) + { + return (string1); + } + } + } + return ((char *)NULL); +} + +#if defined (STATIC_MALLOC) + +/* **************************************************************** */ +/* */ +/* xmalloc and xrealloc () */ +/* */ +/* **************************************************************** */ + +static void memory_error_and_abort (); + +static char * +xmalloc (bytes) + int bytes; +{ + char *temp = (char *)malloc (bytes); + + if (!temp) + memory_error_and_abort (); + return (temp); +} + +static char * +xrealloc (pointer, bytes) + char *pointer; + int bytes; +{ + char *temp; + + if (!pointer) + temp = (char *)malloc (bytes); + else + temp = (char *)realloc (pointer, bytes); + + if (!temp) + memory_error_and_abort (); + + return (temp); +} + +static void +memory_error_and_abort () +{ + fprintf (stderr, "readline: Out of virtual memory!\n"); + abort (); +} +#endif /* STATIC_MALLOC */ |