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freebsd/contrib/libreadline/complete.c
Andrey A. Chernov e14751ab66 Merge conflicts
2000-03-19 22:00:57 +00:00

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/* $FreeBSD$ */
/* 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 2, 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,
59 Temple Place, Suite 330, Boston, MA 02111 USA. */
#define READLINE_LIBRARY
#if defined (HAVE_CONFIG_H)
# include <config.h>
#endif
#include <sys/types.h>
#include <fcntl.h>
#if defined (HAVE_SYS_FILE_H)
#include <sys/file.h>
#endif
#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 <stdio.h>
#include <errno.h>
#if !defined (errno)
extern int errno;
#endif /* !errno */
#include <pwd.h>
#if !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 "posixdir.h"
#include "posixstat.h"
/* System-specific feature definitions and include files. */
#include "rldefs.h"
/* Some standard library routines. */
#include "readline.h"
#include "xmalloc.h"
#include "rlprivate.h"
#ifdef __STDC__
typedef int QSFUNC (const void *, const void *);
#else
typedef int QSFUNC ();
#endif
/* If non-zero, then this is the address of a function to call when
completing a word would normally display the list of possible matches.
This function is called instead of actually doing the display.
It takes three arguments: (char **matches, int num_matches, int max_length)
where MATCHES is the array of strings that matched, NUM_MATCHES is the
number of strings in that array, and MAX_LENGTH is the length of the
longest string in that array. */
VFunction *rl_completion_display_matches_hook = (VFunction *)NULL;
/* Forward declarations for functions defined and used in this file. */
char *filename_completion_function __P((char *, int));
char **completion_matches __P((char *, CPFunction *));
#if defined (VISIBLE_STATS)
# if !defined (X_OK)
# define X_OK 1
# endif
static int stat_char __P((char *));
#endif
static char *rl_quote_filename __P((char *, int, char *));
static char *rl_strpbrk __P((char *, char *));
static char **remove_duplicate_matches __P((char **));
static void insert_match __P((char *, int, int, char *));
static int append_to_match __P((char *, int, int));
static void insert_all_matches __P((char **, int, char *));
static void display_matches __P((char **));
static int compute_lcd_of_matches __P((char **, int, char *));
/* **************************************************************** */
/* */
/* Completion matching, from readline's point of view. */
/* */
/* **************************************************************** */
/* Variables known only to the readline library. */
/* If non-zero, non-unique completions always show the list of matches. */
int _rl_complete_show_all = 0;
/* If non-zero, completed directory names have a slash appended. */
int _rl_complete_mark_directories = 1;
/* If non-zero, completions are printed horizontally in alphabetical order,
like `ls -x'. */
int _rl_print_completions_horizontally;
/* Non-zero means that case is not significant in filename completion. */
#if defined (__MSDOS__) && !defined (__DJGPP__)
int _rl_completion_case_fold = 1;
#else
int _rl_completion_case_fold;
#endif
/* Global variables available to applications using readline. */
#if defined (VISIBLE_STATS)
/* 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 */
/* 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;
/* Pointer to the generator function for completion_matches ().
NULL means to use filename_completion_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;
/* Set to a character indicating the type of completion being performed
by rl_complete_internal, available for use by application completion
functions. */
int rl_completion_type = 0;
/* 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\"\\'`@$><=" */
char *rl_basic_word_break_characters = " \t\n\"\\'`@$><=;|&{(";
/* List of basic quoting characters. */
char *rl_basic_quote_characters = "\"'";
/* 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 should be quoted in filenames by the completer. */
char *rl_filename_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_filename_quote_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;
/* Set to a function to quote a filename in an application-specific fashion.
Called with the text to quote, the type of match found (single or multiple)
and a pointer to the quoting character to be used, which the function can
reset if desired. */
CPFunction *rl_filename_quoting_function = rl_quote_filename;
/* Function to call to remove quoting characters from a filename. Called
before completion is attempted, so the embedded quotes do not interfere
with matching names in the file system. Readline doesn't do anything
with this; it's set only by applications. */
CPFunction *rl_filename_dequoting_function = (CPFunction *)NULL;
/* Function to call to decide whether or not a word break character is
quoted. If a character is quoted, it does not break words for the
completer. */
Function *rl_char_is_quoted_p = (Function *)NULL;
/* Character appended to completed words when at the end of the line. The
default is a space. */
int rl_completion_append_character = ' ';
/* If non-zero, inhibit completion (temporarily). */
int rl_inhibit_completion;
/* Variables local to this file. */
/* Local variable states what happened during the last completion attempt. */
static int completion_changed_buffer;
/*************************************/
/* */
/* Bindable completion functions */
/* */
/*************************************/
/* 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. */
int
rl_complete (ignore, invoking_key)
int ignore, invoking_key;
{
if (rl_inhibit_completion)
return (rl_insert (ignore, invoking_key));
else 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 (). */
int
rl_possible_completions (ignore, invoking_key)
int ignore, invoking_key;
{
return (rl_complete_internal ('?'));
}
int
rl_insert_completions (ignore, invoking_key)
int ignore, invoking_key;
{
return (rl_complete_internal ('*'));
}
/************************************/
/* */
/* Completion utility functions */
/* */
/************************************/
/* 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);
}
/* The user must press "y" or "n". Non-zero return means "y" pressed. */
static int
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_internal ();
ding ();
}
}
#if defined (VISIBLE_STATS)
/* Return the character which best describes FILENAME.
`@' for symbolic links
`/' for directories
`*' for executables
`=' for sockets
`|' for FIFOs
`%' for character special devices
`#' for block special devices */
static int
stat_char (filename)
char *filename;
{
struct stat finfo;
int character, r;
#if defined (HAVE_LSTAT) && 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_ISCHR)
else if (S_ISCHR (finfo.st_mode))
character = '%';
#endif /* S_ISCHR */
#if defined (S_ISBLK)
else if (S_ISBLK (finfo.st_mode))
character = '#';
#endif /* S_ISBLK */
#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 */
#if defined (S_ISFIFO)
else if (S_ISFIFO (finfo.st_mode))
character = '|';
#endif
else if (S_ISREG (finfo.st_mode))
{
if (access (filename, X_OK) == 0)
character = '*';
}
return (character);
}
#endif /* VISIBLE_STATS */
/* 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;
temp = rl_filename_completion_desired ? strrchr (pathname, '/') : (char *)NULL;
#if defined (__MSDOS__)
if (rl_filename_completion_desired && temp == 0 && isalpha (pathname[0]) && pathname[1] == ':')
temp = pathname + 1;
#endif
return (temp ? ++temp : pathname);
}
/* 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 the number of characters we output. */
#define PUTX(c) \
do { \
if (CTRL_CHAR (c)) \
{ \
putc ('^', rl_outstream); \
putc (UNCTRL (c), rl_outstream); \
printed_len += 2; \
} \
else if (c == RUBOUT) \
{ \
putc ('^', rl_outstream); \
putc ('?', rl_outstream); \
printed_len += 2; \
} \
else \
{ \
putc (c, rl_outstream); \
printed_len++; \
} \
} while (0)
static int
print_filename (to_print, full_pathname)
char *to_print, *full_pathname;
{
int printed_len = 0;
#if !defined (VISIBLE_STATS)
char *s;
for (s = to_print; *s; s++)
{
PUTX (*s);
}
#else
char *s, c, *new_full_pathname;
int extension_char, slen, tlen;
for (s = to_print; *s; s++)
{
PUTX (*s);
}
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';
/* If setting the last slash in full_pathname to a NUL results in
full_pathname being the empty string, we are trying to complete
files in the root directory. If we pass a null string to the
bash directory completion hook, for example, it will expand it
to the current directory. We just want the `/'. */
s = tilde_expand (full_pathname && *full_pathname ? 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);
printed_len++;
}
}
#endif /* VISIBLE_STATS */
return printed_len;
}
static char *
rl_quote_filename (s, rtype, qcp)
char *s;
int rtype;
char *qcp;
{
char *r;
r = xmalloc (strlen (s) + 2);
*r = *rl_completer_quote_characters;
strcpy (r + 1, s);
if (qcp)
*qcp = *rl_completer_quote_characters;
return r;
}
/* Find the bounds of the current word for completion purposes, and leave
rl_point set to the end of the word. This function skips quoted
substrings (characters between matched pairs of characters in
rl_completer_quote_characters. First we try to find an unclosed
quoted substring on which to do matching. If one is not found, we use
the word break characters to find the boundaries of the current word.
We call an application-specific function to decide whether or not a
particular word break character is quoted; if that function returns a
non-zero result, the character does not break a word. This function
returns the opening quote character if we found an unclosed quoted
substring, '\0' otherwise. FP, if non-null, is set to a value saying
which (shell-like) quote characters we found (single quote, double
quote, or backslash) anywhere in the string. DP, if non-null, is set to
the value of the delimiter character that caused a word break. */
static char
find_completion_word (fp, dp)
int *fp, *dp;
{
int scan, end, found_quote, delimiter, pass_next, isbrk;
char quote_char;
end = rl_point;
found_quote = delimiter = 0;
quote_char = '\0';
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 |= RL_QF_BACKSLASH;
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 |= RL_QF_SINGLE_QUOTE;
else if (quote_char == '"')
found_quote |= RL_QF_DOUBLE_QUOTE;
}
}
}
if (rl_point == end && quote_char == '\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;
/* Call the application-specific function to tell us whether
this word break character is quoted and should be skipped. */
if (rl_char_is_quoted_p && found_quote &&
(*rl_char_is_quoted_p) (rl_line_buffer, rl_point))
continue;
/* 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 there is an application-specific function to say whether or not
a character is quoted and we found a quote character, let that
function decide whether or not a character is a word break, even
if it is found in rl_completer_word_break_characters. Don't bother
if we're at the end of the line, though. */
if (scan)
{
if (rl_char_is_quoted_p)
isbrk = (found_quote == 0 ||
(*rl_char_is_quoted_p) (rl_line_buffer, rl_point) == 0) &&
strchr (rl_completer_word_break_characters, scan) != 0;
else
isbrk = strchr (rl_completer_word_break_characters, scan) != 0;
if (isbrk)
{
/* If the character that caused the word break was a quoting
character, then remember it as the delimiter. */
if (rl_basic_quote_characters &&
strchr (rl_basic_quote_characters, 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 == 0 || strchr (rl_special_prefixes, scan) == 0)
rl_point++;
}
}
if (fp)
*fp = found_quote;
if (dp)
*dp = delimiter;
return (quote_char);
}
static char **
gen_completion_matches (text, start, end, our_func, found_quote, quote_char)
char *text;
int start, end;
Function *our_func;
int found_quote, quote_char;
{
char **matches, *temp;
/* 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;
return (matches);
}
}
/* Beware -- we're stripping the quotes here. Do this only if we know
we are doing filename completion and the application has defined a
filename dequoting function. */
temp = (char *)NULL;
if (found_quote && our_func == (Function *)filename_completion_function &&
rl_filename_dequoting_function)
{
/* delete single and double quotes */
temp = (*rl_filename_dequoting_function) (text, quote_char);
text = temp; /* not freeing text is not a memory leak */
}
matches = completion_matches (text, (CPFunction *)our_func);
FREE (temp);
return matches;
}
/* Filter out duplicates in MATCHES. This frees up the strings in
MATCHES. */
static char **
remove_duplicate_matches (matches)
char **matches;
{
char *lowest_common;
int i, j, newlen;
char dead_slot;
char **temp_array;
/* Sort the items. */
for (i = 0; matches[i]; i++)
;
/* Sort the array without matches[0], since we need it to
stay in place no matter what. */
if (i)
qsort (matches+1, i-1, sizeof (char *), (QSFUNC *)_rl_qsort_string_compare);
/* Remember the lowest common denominator for it may be unique. */
lowest_common = savestring (matches[0]);
for (i = newlen = 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]);
/* Place the lowest common denominator back in [0]. */
temp_array[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 (temp_array[0], temp_array[1]) == 0)
{
free (temp_array[1]);
temp_array[1] = (char *)NULL;
}
return (temp_array);
}
/* Find the common prefix of the list of matches, and put it into
matches[0]. */
static int
compute_lcd_of_matches (match_list, matches, text)
char **match_list;
int matches;
char *text;
{
register int i, c1, c2, si;
int low; /* Count of max-matched characters. */
/* If only one match, just use that. Otherwise, compare each
member of the list with the next, finding out where they
stop matching. */
if (matches == 1)
{
match_list[0] = match_list[1];
match_list[1] = (char *)NULL;
return 1;
}
for (i = 1, low = 100000; i < matches; i++)
{
if (_rl_completion_case_fold)
{
for (si = 0;
(c1 = _rl_to_lower(match_list[i][si])) &&
(c2 = _rl_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;
}
/* If there were multiple matches, but none matched up to even the
first character, and the user typed something, use that as the
value of matches[0]. */
if (low == 0 && text && *text)
{
match_list[0] = xmalloc (strlen (text) + 1);
strcpy (match_list[0], text);
}
else
{
match_list[0] = xmalloc (low + 1);
strncpy (match_list[0], match_list[1], low);
match_list[0][low] = '\0';
}
return matches;
}
static int
postprocess_matches (matchesp, matching_filenames)
char ***matchesp;
int matching_filenames;
{
char *t, **matches, **temp_matches;
int nmatch, i;
matches = *matchesp;
/* 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)
{
temp_matches = remove_duplicate_matches (matches);
free (matches);
matches = temp_matches;
}
/* 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 && matching_filenames)
{
for (nmatch = 1; matches[nmatch]; nmatch++)
;
(void)(*rl_ignore_some_completions_function) (matches);
if (matches == 0 || matches[0] == 0)
{
FREE (matches);
*matchesp = (char **)0;
return 0;
}
else
{
/* If we removed some matches, recompute the common prefix. */
for (i = 1; matches[i]; i++)
;
if (i > 1 && i < nmatch)
{
t = matches[0];
compute_lcd_of_matches (matches, i - 1, t);
FREE (t);
}
}
}
*matchesp = matches;
return (1);
}
/* A convenience function for displaying a list of strings in
columnar format on readline's output stream. MATCHES is the list
of strings, in argv format, LEN is the number of strings in MATCHES,
and MAX is the length of the longest string in MATCHES. */
void
rl_display_match_list (matches, len, max)
char **matches;
int len, max;
{
int count, limit, printed_len;
int i, j, k, l;
char *temp;
/* 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.
0 < len <= limit implies count = 1. */
/* Sort the items if they are not already sorted. */
if (rl_ignore_completion_duplicates == 0)
qsort (matches + 1, len, sizeof (char *), (QSFUNC *)_rl_qsort_string_compare);
crlf ();
if (_rl_print_completions_horizontally == 0)
{
/* Print the sorted items, up-and-down alphabetically, like ls. */
for (i = 1; i <= count; i++)
{
for (j = 0, l = i; j < limit; j++)
{
if (l > len || matches[l] == 0)
break;
else
{
temp = printable_part (matches[l]);
printed_len = print_filename (temp, matches[l]);
if (j + 1 < limit)
for (k = 0; k < max - printed_len; k++)
putc (' ', rl_outstream);
}
l += count;
}
crlf ();
}
}
else
{
/* Print the sorted items, across alphabetically, like ls -x. */
for (i = 1; matches[i]; i++)
{
temp = printable_part (matches[i]);
printed_len = print_filename (temp, matches[i]);
/* Have we reached the end of this line? */
if (matches[i+1])
{
if (i && (limit > 1) && (i % limit) == 0)
crlf ();
else
for (k = 0; k < max - printed_len; k++)
putc (' ', rl_outstream);
}
}
crlf ();
}
}
/* Display MATCHES, a list of matching filenames in argv format. This
handles the simple case -- a single match -- first. If there is more
than one match, we compute the number of strings in the list and the
length of the longest string, which will be needed by the display
function. If the application wants to handle displaying the list of
matches itself, it sets RL_COMPLETION_DISPLAY_MATCHES_HOOK to the
address of a function, and we just call it. If we're handling the
display ourselves, we just call rl_display_match_list. We also check
that the list of matches doesn't exceed the user-settable threshold,
and ask the user if he wants to see the list if there are more matches
than RL_COMPLETION_QUERY_ITEMS. */
static void
display_matches (matches)
char **matches;
{
int len, max, i;
char *temp;
/* Move to the last visible line of a possibly-multiple-line command. */
_rl_move_vert (_rl_vis_botlin);
/* Handle simple case first. What if there is only one answer? */
if (matches[1] == 0)
{
temp = printable_part (matches[0]);
crlf ();
print_filename (temp, matches[0]);
crlf ();
rl_forced_update_display ();
rl_display_fixed = 1;
return;
}
/* There is more than one answer. Find out how many there are,
and find the maximum printed length of a single entry. */
for (max = 0, i = 1; matches[i]; i++)
{
temp = printable_part (matches[i]);
len = strlen (temp);
if (len > max)
max = len;
}
len = i - 1;
/* If the caller has defined a display hook, then call that now. */
if (rl_completion_display_matches_hook)
{
(*rl_completion_display_matches_hook) (matches, len, max);
return;
}
/* 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, "Display all %d possibilities? (y or n)", len);
fflush (rl_outstream);
if (get_y_or_n () == 0)
{
crlf ();
rl_forced_update_display ();
rl_display_fixed = 1;
return;
}
}
rl_display_match_list (matches, len, max);
rl_forced_update_display ();
rl_display_fixed = 1;
}
static char *
make_quoted_replacement (match, mtype, qc)
char *match;
int mtype;
char *qc; /* Pointer to quoting character, if any */
{
int should_quote, do_replace;
char *replacement;
/* 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 = match;
should_quote = match && rl_completer_quote_characters &&
rl_filename_completion_desired &&
rl_filename_quoting_desired;
if (should_quote)
should_quote = should_quote && (!qc || !*qc ||
(rl_completer_quote_characters && strchr (rl_completer_quote_characters, *qc)));
if (should_quote)
{
/* 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. */
should_quote = rl_filename_quote_characters
? (rl_strpbrk (match, rl_filename_quote_characters) != 0)
: 0;
do_replace = should_quote ? mtype : NO_MATCH;
/* Quote the replacement, since we found an embedded
word break character in a potential match. */
if (do_replace != NO_MATCH && rl_filename_quoting_function)
replacement = (*rl_filename_quoting_function) (match, do_replace, qc);
}
return (replacement);
}
static void
insert_match (match, start, mtype, qc)
char *match;
int start, mtype;
char *qc;
{
char *replacement;
char oqc;
oqc = qc ? *qc : '\0';
replacement = make_quoted_replacement (match, mtype, qc);
/* Now insert the match. */
if (replacement)
{
/* Don't double an opening quote character. */
if (qc && *qc && start && rl_line_buffer[start - 1] == *qc &&
replacement[0] == *qc)
start--;
/* If make_quoted_replacement changed the quoting character, remove
the opening quote and insert the (fully-quoted) replacement. */
else if (qc && (*qc != oqc) && start && rl_line_buffer[start - 1] == oqc &&
replacement[0] != oqc)
start--;
_rl_replace_text (replacement, start, rl_point - 1);
if (replacement != match)
free (replacement);
}
}
/* Append any necessary closing quote and a separator character to the
just-inserted match. If the user has specified that directories
should be marked by a trailing `/', append one of those instead. The
default trailing character is a space. Returns the number of characters
appended. */
static int
append_to_match (text, delimiter, quote_char)
char *text;
int delimiter, quote_char;
{
char temp_string[4], *filename;
int temp_string_index;
struct stat finfo;
temp_string_index = 0;
if (quote_char && rl_point && rl_line_buffer[rl_point - 1] != quote_char)
temp_string[temp_string_index++] = quote_char;
if (delimiter)
temp_string[temp_string_index++] = delimiter;
else if (rl_completion_append_character)
temp_string[temp_string_index++] = rl_completion_append_character;
temp_string[temp_string_index++] = '\0';
if (rl_filename_completion_desired)
{
filename = tilde_expand (text);
if (stat (filename, &finfo) == 0 && S_ISDIR (finfo.st_mode))
{
if (_rl_complete_mark_directories && 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);
}
return (temp_string_index);
}
static void
insert_all_matches (matches, point, qc)
char **matches;
int point;
char *qc;
{
int i;
char *rp;
rl_begin_undo_group ();
/* remove any opening quote character; make_quoted_replacement will add
it back. */
if (qc && *qc && point && rl_line_buffer[point - 1] == *qc)
point--;
rl_delete_text (point, rl_point);
rl_point = point;
if (matches[1])
{
for (i = 1; matches[i]; i++)
{
rp = make_quoted_replacement (matches[i], SINGLE_MATCH, qc);
rl_insert_text (rp);
rl_insert_text (" ");
if (rp != matches[i])
free (rp);
}
}
else
{
rp = make_quoted_replacement (matches[0], SINGLE_MATCH, qc);
rl_insert_text (rp);
rl_insert_text (" ");
if (rp != matches[0])
free (rp);
}
rl_end_undo_group ();
}
static void
free_match_list (matches)
char **matches;
{
register int i;
for (i = 0; matches[i]; i++)
free (matches[i]);
free (matches);
}
/* 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. */
int
rl_complete_internal (what_to_do)
int what_to_do;
{
char **matches;
Function *our_func;
int start, end, delimiter, found_quote, i;
char *text, *saved_line_buffer;
char quote_char;
/* Only the completion entry function can change these. */
rl_filename_completion_desired = 0;
rl_filename_quoting_desired = 1;
rl_completion_type = what_to_do;
saved_line_buffer = rl_line_buffer ? savestring (rl_line_buffer) : (char *)NULL;
our_func = rl_completion_entry_function
? rl_completion_entry_function
: (Function *)filename_completion_function;
/* We now look backwards for the start of a filename/variable word. */
end = rl_point;
found_quote = delimiter = 0;
quote_char = '\0';
if (rl_point)
/* This (possibly) changes rl_point. If it returns a non-zero char,
we know we have an open quote. */
quote_char = find_completion_word (&found_quote, &delimiter);
start = rl_point;
rl_point = end;
text = rl_copy_text (start, end);
matches = gen_completion_matches (text, start, end, our_func, found_quote, quote_char);
free (text);
if (matches == 0)
{
ding ();
FREE (saved_line_buffer);
return (0);
}
#if 0
/* If we are matching filenames, our_func will have been set to
filename_completion_function */
i = our_func == (Function *)filename_completion_function;
#else
/* If we are matching filenames, the attempted completion function will
have set rl_filename_completion_desired to a non-zero value. The basic
filename_completion_function does this. */
i = rl_filename_completion_desired;
#endif
if (postprocess_matches (&matches, i) == 0)
{
ding ();
FREE (saved_line_buffer);
completion_changed_buffer = 0;
return (0);
}
switch (what_to_do)
{
case TAB:
case '!':
/* Insert the first match with proper quoting. */
if (*matches[0])
insert_match (matches[0], start, matches[1] ? MULT_MATCH : SINGLE_MATCH, &quote_char);
/* If there are more matches, ring the bell to indicate.
If we are in vi mode, Posix.2 says to not ring the bell.
If the `show-all-if-ambiguous' variable is set, display
all the matches immediately. Otherwise, if this was the
only match, and we are hacking files, check the file to
see if it was a directory. If so, and the `mark-directories'
variable is set, 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 == '!')
{
display_matches (matches);
break;
}
else if (rl_editing_mode != vi_mode)
ding (); /* There are other matches remaining. */
}
else
append_to_match (matches[0], delimiter, quote_char);
break;
case '*':
insert_all_matches (matches, start, &quote_char);
break;
case '?':
display_matches (matches);
break;
default:
fprintf (stderr, "\r\nreadline: bad value %d for what_to_do in rl_complete\n", what_to_do);
ding ();
FREE (saved_line_buffer);
return 1;
}
free_match_list (matches);
/* Check to see if the line has changed through all of this manipulation. */
if (saved_line_buffer)
{
completion_changed_buffer = strcmp (rl_line_buffer, saved_line_buffer) != 0;
free (saved_line_buffer);
}
return 0;
}
/***************************************************************/
/* */
/* Application-callable completion match generator functions */
/* */
/***************************************************************/
/* 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;
/* Number of matches actually found. */
int matches;
/* Temporary string binder. */
char *string;
matches = 0;
match_list_size = 10;
match_list = (char **)xmalloc ((match_list_size + 1) * sizeof (char *));
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)
compute_lcd_of_matches (match_list, matches, text);
else /* There were no matches. */
{
free (match_list);
match_list = (char **)NULL;
}
return (match_list);
}
/* A completion function for usernames.
TEXT contains a partial username preceded by a random
character (usually `~'). */
char *
username_completion_function (text, state)
char *text;
int state;
{
#if defined (__WIN32__) || defined (__OPENNT)
return (char *)NULL;
#else /* !__WIN32__ && !__OPENNT) */
static char *username = (char *)NULL;
static struct passwd *entry;
static int namelen, first_char, first_char_loc;
char *value;
if (state == 0)
{
FREE (username);
first_char = *text;
first_char_loc = first_char == '~';
username = savestring (&text[first_char_loc]);
namelen = strlen (username);
setpwent ();
}
while (entry = getpwent ())
{
/* Null usernames should result in all users as possible completions. */
if (namelen == 0 || (STREQN (username, entry->pw_name, namelen)))
break;
}
if (entry == 0)
{
endpwent ();
return ((char *)NULL);
}
else
{
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 /* !__WIN32__ && !__OPENNT */
}
/* 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)
char *text;
int state;
{
static DIR *directory = (DIR *)NULL;
static char *filename = (char *)NULL;
static char *dirname = (char *)NULL;
static char *users_dirname = (char *)NULL;
static int filename_len;
char *temp;
int dirlen;
struct dirent *entry;
/* If we don't have any state, then do some initialization. */
if (state == 0)
{
/* If we were interrupted before closing the directory or reading
all of its contents, close it. */
if (directory)
{
closedir (directory);
directory = (DIR *)NULL;
}
FREE (dirname);
FREE (filename);
FREE (users_dirname);
filename = savestring (text);
if (*text == 0)
text = ".";
dirname = savestring (text);
temp = strrchr (dirname, '/');
#if defined (__MSDOS__)
/* special hack for //X/... */
if (dirname[0] == '/' && dirname[1] == '/' && isalpha (dirname[2]) && dirname[3] == '/')
temp = strrchr (dirname + 3, '/');
#endif
if (temp)
{
strcpy (filename, ++temp);
*temp = '\0';
}
#if defined (__MSDOS__)
/* searches from current directory on the drive */
else if (isalpha (dirname[0]) && dirname[1] == ':')
{
strcpy (filename, dirname + 2);
dirname[2] = '\0';
}
#endif
else
{
dirname[0] = '.';
dirname[1] = '\0';
}
/* 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);
if (*dirname == '~')
{
temp = tilde_expand (dirname);
free (dirname);
dirname = temp;
}
if (rl_directory_completion_hook && (*rl_directory_completion_hook) (&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. */
entry = (struct dirent *)NULL;
while (directory && (entry = readdir (directory)))
{
/* Special case for no filename.
All entries except "." and ".." match. */
if (filename_len == 0)
{
if (entry->d_name[0] != '.' ||
(entry->d_name[1] &&
(entry->d_name[1] != '.' || entry->d_name[2])))
break;
}
else
{
/* Otherwise, if these match up to the length of filename, then
it is a match. */
if (_rl_completion_case_fold)
{
if ((_rl_to_lower (entry->d_name[0]) == _rl_to_lower (filename[0])) &&
(((int)D_NAMLEN (entry)) >= filename_len) &&
(_rl_strnicmp (filename, entry->d_name, filename_len) == 0))
break;
}
else
{
if ((entry->d_name[0] == filename[0]) &&
(((int)D_NAMLEN (entry)) >= filename_len) &&
(strncmp (filename, entry->d_name, filename_len) == 0))
break;
}
}
}
if (entry == 0)
{
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
{
/* dirname && (strcmp (dirname, ".") != 0) */
if (dirname && (dirname[0] != '.' || dirname[1]))
{
if (rl_complete_with_tilde_expansion && *users_dirname == '~')
{
dirlen = strlen (dirname);
temp = xmalloc (2 + dirlen + D_NAMLEN (entry));
strcpy (temp, dirname);
/* Canonicalization cuts off any final slash present. We
may need to add it back. */
if (dirname[dirlen - 1] != '/')
{
temp[dirlen++] = '/';
temp[dirlen] = '\0';
}
}
else
{
dirlen = strlen (users_dirname);
temp = xmalloc (1 + dirlen + D_NAMLEN (entry));
strcpy (temp, users_dirname);
}
strcpy (temp + dirlen, entry->d_name);
}
else
temp = savestring (entry->d_name);
return (temp);
}
}
/* An initial implementation of a menu completion function a la tcsh. The
first time (if the last readline command was not rl_menu_complete), we
generate the list of matches. This code is very similar to the code in
rl_complete_internal -- there should be a way to combine the two. Then,
for each item in the list of matches, we insert the match in an undoable
fashion, with the appropriate character appended (this happens on the
second and subsequent consecutive calls to rl_menu_complete). When we
hit the end of the match list, we restore the original unmatched text,
ring the bell, and reset the counter to zero. */
int
rl_menu_complete (count, ignore)
int count, ignore;
{
Function *our_func;
int matching_filenames, found_quote;
static char *orig_text;
static char **matches = (char **)0;
static int match_list_index = 0;
static int match_list_size = 0;
static int orig_start, orig_end;
static char quote_char;
static int delimiter;
/* The first time through, we generate the list of matches and set things
up to insert them. */
if (rl_last_func != rl_menu_complete)
{
/* Clean up from previous call, if any. */
FREE (orig_text);
if (matches)
free_match_list (matches);
match_list_index = match_list_size = 0;
matches = (char **)NULL;
/* Only the completion entry function can change these. */
rl_filename_completion_desired = 0;
rl_filename_quoting_desired = 1;
rl_completion_type = '%';
our_func = rl_completion_entry_function
? rl_completion_entry_function
: (Function *)filename_completion_function;
/* We now look backwards for the start of a filename/variable word. */
orig_end = rl_point;
found_quote = delimiter = 0;
quote_char = '\0';
if (rl_point)
/* This (possibly) changes rl_point. If it returns a non-zero char,
we know we have an open quote. */
quote_char = find_completion_word (&found_quote, &delimiter);
orig_start = rl_point;
rl_point = orig_end;
orig_text = rl_copy_text (orig_start, orig_end);
matches = gen_completion_matches (orig_text, orig_start, orig_end,
our_func, found_quote, quote_char);
#if 0
/* If we are matching filenames, our_func will have been set to
filename_completion_function */
matching_filenames = our_func == (Function *)filename_completion_function;
#else
/* If we are matching filenames, the attempted completion function will
have set rl_filename_completion_desired to a non-zero value. The basic
filename_completion_function does this. */
matching_filenames = rl_filename_completion_desired;
#endif
if (matches == 0 || postprocess_matches (&matches, matching_filenames) == 0)
{
ding ();
FREE (matches);
matches = (char **)0;
FREE (orig_text);
orig_text = (char *)0;
completion_changed_buffer = 0;
return (0);
}
for (match_list_size = 0; matches[match_list_size]; match_list_size++)
;
/* matches[0] is lcd if match_list_size > 1, but the circular buffer
code below should take care of it. */
}
/* Now we have the list of matches. Replace the text between
rl_line_buffer[orig_start] and rl_line_buffer[rl_point] with
matches[match_list_index], and add any necessary closing char. */
if (matches == 0 || match_list_size == 0)
{
ding ();
FREE (matches);
matches = (char **)0;
completion_changed_buffer = 0;
return (0);
}
match_list_index = (match_list_index + count) % match_list_size;
if (match_list_index < 0)
match_list_index += match_list_size;
if (match_list_index == 0 && match_list_size > 1)
{
ding ();
insert_match (orig_text, orig_start, MULT_MATCH, &quote_char);
}
else
{
insert_match (matches[match_list_index], orig_start, SINGLE_MATCH, &quote_char);
append_to_match (matches[match_list_index], delimiter, quote_char);
}
completion_changed_buffer = 1;
return (0);
}
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