Mercurial > hg > xemacs-beta
view src/dired.c @ 665:fdefd0186b75
[xemacs-hg @ 2001-09-20 06:28:42 by ben]
The great integral types renaming.
The purpose of this is to rationalize the names used for various
integral types, so that they match their intended uses and follow
consist conventions, and eliminate types that were not semantically
different from each other.
The conventions are:
-- All integral types that measure quantities of anything are
signed. Some people disagree vociferously with this, but their
arguments are mostly theoretical, and are vastly outweighed by
the practical headaches of mixing signed and unsigned values,
and more importantly by the far increased likelihood of
inadvertent bugs: Because of the broken "viral" nature of
unsigned quantities in C (operations involving mixed
signed/unsigned are done unsigned, when exactly the opposite is
nearly always wanted), even a single error in declaring a
quantity unsigned that should be signed, or even the even more
subtle error of comparing signed and unsigned values and
forgetting the necessary cast, can be catastrophic, as
comparisons will yield wrong results. -Wsign-compare is turned
on specifically to catch this, but this tends to result in a
great number of warnings when mixing signed and unsigned, and
the casts are annoying. More has been written on this
elsewhere.
-- All such quantity types just mentioned boil down to EMACS_INT,
which is 32 bits on 32-bit machines and 64 bits on 64-bit
machines. This is guaranteed to be the same size as Lisp
objects of type `int', and (as far as I can tell) of size_t
(unsigned!) and ssize_t. The only type below that is not an
EMACS_INT is Hashcode, which is an unsigned value of the same
size as EMACS_INT.
-- Type names should be relatively short (no more than 10
characters or so), with the first letter capitalized and no
underscores if they can at all be avoided.
-- "count" == a zero-based measurement of some quantity. Includes
sizes, offsets, and indexes.
-- "bpos" == a one-based measurement of a position in a buffer.
"Charbpos" and "Bytebpos" count text in the buffer, rather than
bytes in memory; thus Bytebpos does not directly correspond to
the memory representation. Use "Membpos" for this.
-- "Char" refers to internal-format characters, not to the C type
"char", which is really a byte.
-- For the actual name changes, see the script below.
I ran the following script to do the conversion. (NOTE: This script
is idempotent. You can safely run it multiple times and it will
not screw up previous results -- in fact, it will do nothing if
nothing has changed. Thus, it can be run repeatedly as necessary
to handle patches coming in from old workspaces, or old branches.)
There are two tags, just before and just after the change:
`pre-integral-type-rename' and `post-integral-type-rename'. When
merging code from the main trunk into a branch, the best thing to
do is first merge up to `pre-integral-type-rename', then apply the
script and associated changes, then merge from
`post-integral-type-change' to the present. (Alternatively, just do
the merging in one operation; but you may then have a lot of
conflicts needing to be resolved by hand.)
Script `fixtypes.sh' follows:
----------------------------------- cut ------------------------------------
files="*.[ch] s/*.h m/*.h config.h.in ../configure.in Makefile.in.in ../lib-src/*.[ch] ../lwlib/*.[ch]"
gr Memory_Count Bytecount $files
gr Lstream_Data_Count Bytecount $files
gr Element_Count Elemcount $files
gr Hash_Code Hashcode $files
gr extcount bytecount $files
gr bufpos charbpos $files
gr bytind bytebpos $files
gr memind membpos $files
gr bufbyte intbyte $files
gr Extcount Bytecount $files
gr Bufpos Charbpos $files
gr Bytind Bytebpos $files
gr Memind Membpos $files
gr Bufbyte Intbyte $files
gr EXTCOUNT BYTECOUNT $files
gr BUFPOS CHARBPOS $files
gr BYTIND BYTEBPOS $files
gr MEMIND MEMBPOS $files
gr BUFBYTE INTBYTE $files
gr MEMORY_COUNT BYTECOUNT $files
gr LSTREAM_DATA_COUNT BYTECOUNT $files
gr ELEMENT_COUNT ELEMCOUNT $files
gr HASH_CODE HASHCODE $files
----------------------------------- cut ------------------------------------
`fixtypes.sh' is a Bourne-shell script; it uses 'gr':
----------------------------------- cut ------------------------------------
#!/bin/sh
# Usage is like this:
# gr FROM TO FILES ...
# globally replace FROM with TO in FILES. FROM and TO are regular expressions.
# backup files are stored in the `backup' directory.
from="$1"
to="$2"
shift 2
echo ${1+"$@"} | xargs global-replace "s/$from/$to/g"
----------------------------------- cut ------------------------------------
`gr' in turn uses a Perl script to do its real work,
`global-replace', which follows:
----------------------------------- cut ------------------------------------
: #-*- Perl -*-
### global-modify --- modify the contents of a file by a Perl expression
## Copyright (C) 1999 Martin Buchholz.
## Copyright (C) 2001 Ben Wing.
## Authors: Martin Buchholz <martin@xemacs.org>, Ben Wing <ben@xemacs.org>
## Maintainer: Ben Wing <ben@xemacs.org>
## Current Version: 1.0, May 5, 2001
# This program 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.
#
# This program 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.
#
# You should have received a copy of the GNU General Public License
# along with XEmacs; see the file COPYING. If not, write to the Free
# Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
eval 'exec perl -w -S $0 ${1+"$@"}'
if 0;
use strict;
use FileHandle;
use Carp;
use Getopt::Long;
use File::Basename;
(my $myName = $0) =~ s@.*/@@; my $usage="
Usage: $myName [--help] [--backup-dir=DIR] [--line-mode] [--hunk-mode]
PERLEXPR FILE ...
Globally modify a file, either line by line or in one big hunk.
Typical usage is like this:
[with GNU print, GNU xargs: guaranteed to handle spaces, quotes, etc.
in file names]
find . -name '*.[ch]' -print0 | xargs -0 $0 's/\bCONST\b/const/g'\n
[with non-GNU print, xargs]
find . -name '*.[ch]' -print | xargs $0 's/\bCONST\b/const/g'\n
The file is read in, either line by line (with --line-mode specified)
or in one big hunk (with --hunk-mode specified; it's the default), and
the Perl expression is then evalled with \$_ set to the line or hunk of
text, including the terminating newline if there is one. It should
destructively modify the value there, storing the changed result in \$_.
Files in which any modifications are made are backed up to the directory
specified using --backup-dir, or to `backup' by default. To disable this,
use --backup-dir= with no argument.
Hunk mode is the default because it is MUCH MUCH faster than line-by-line.
Use line-by-line only when it matters, e.g. you want to do a replacement
only once per line (the default without the `g' argument). Conversely,
when using hunk mode, *ALWAYS* use `g'; otherwise, you will only make one
replacement in the entire file!
";
my %options = ();
$Getopt::Long::ignorecase = 0;
&GetOptions (
\%options,
'help', 'backup-dir=s', 'line-mode', 'hunk-mode',
);
die $usage if $options{"help"} or @ARGV <= 1;
my $code = shift;
die $usage if grep (-d || ! -w, @ARGV);
sub SafeOpen {
open ((my $fh = new FileHandle), $_[0]);
confess "Can't open $_[0]: $!" if ! defined $fh;
return $fh;
}
sub SafeClose {
close $_[0] or confess "Can't close $_[0]: $!";
}
sub FileContents {
my $fh = SafeOpen ("< $_[0]");
my $olddollarslash = $/;
local $/ = undef;
my $contents = <$fh>;
$/ = $olddollarslash;
return $contents;
}
sub WriteStringToFile {
my $fh = SafeOpen ("> $_[0]");
binmode $fh;
print $fh $_[1] or confess "$_[0]: $!\n";
SafeClose $fh;
}
foreach my $file (@ARGV) {
my $changed_p = 0;
my $new_contents = "";
if ($options{"line-mode"}) {
my $fh = SafeOpen $file;
while (<$fh>) {
my $save_line = $_;
eval $code;
$changed_p = 1 if $save_line ne $_;
$new_contents .= $_;
}
} else {
my $orig_contents = $_ = FileContents $file;
eval $code;
if ($_ ne $orig_contents) {
$changed_p = 1;
$new_contents = $_;
}
}
if ($changed_p) {
my $backdir = $options{"backup-dir"};
$backdir = "backup" if !defined ($backdir);
if ($backdir) {
my ($name, $path, $suffix) = fileparse ($file, "");
my $backfulldir = $path . $backdir;
my $backfile = "$backfulldir/$name";
mkdir $backfulldir, 0755 unless -d $backfulldir;
print "modifying $file (original saved in $backfile)\n";
rename $file, $backfile;
}
WriteStringToFile ($file, $new_contents);
}
}
----------------------------------- cut ------------------------------------
In addition to those programs, I needed to fix up a few other
things, particularly relating to the duplicate definitions of
types, now that some types merged with others. Specifically:
1. in lisp.h, removed duplicate declarations of Bytecount. The
changed code should now look like this: (In each code snippet
below, the first and last lines are the same as the original, as
are all lines outside of those lines. That allows you to locate
the section to be replaced, and replace the stuff in that
section, verifying that there isn't anything new added that
would need to be kept.)
--------------------------------- snip -------------------------------------
/* Counts of bytes or chars */
typedef EMACS_INT Bytecount;
typedef EMACS_INT Charcount;
/* Counts of elements */
typedef EMACS_INT Elemcount;
/* Hash codes */
typedef unsigned long Hashcode;
/* ------------------------ dynamic arrays ------------------- */
--------------------------------- snip -------------------------------------
2. in lstream.h, removed duplicate declaration of Bytecount.
Rewrote the comment about this type. The changed code should
now look like this:
--------------------------------- snip -------------------------------------
#endif
/* The have been some arguments over the what the type should be that
specifies a count of bytes in a data block to be written out or read in,
using Lstream_read(), Lstream_write(), and related functions.
Originally it was long, which worked fine; Martin "corrected" these to
size_t and ssize_t on the grounds that this is theoretically cleaner and
is in keeping with the C standards. Unfortunately, this practice is
horribly error-prone due to design flaws in the way that mixed
signed/unsigned arithmetic happens. In fact, by doing this change,
Martin introduced a subtle but fatal error that caused the operation of
sending large mail messages to the SMTP server under Windows to fail.
By putting all values back to be signed, avoiding any signed/unsigned
mixing, the bug immediately went away. The type then in use was
Lstream_Data_Count, so that it be reverted cleanly if a vote came to
that. Now it is Bytecount.
Some earlier comments about why the type must be signed: This MUST BE
SIGNED, since it also is used in functions that return the number of
bytes actually read to or written from in an operation, and these
functions can return -1 to signal error.
Note that the standard Unix read() and write() functions define the
count going in as a size_t, which is UNSIGNED, and the count going
out as an ssize_t, which is SIGNED. This is a horrible design
flaw. Not only is it highly likely to lead to logic errors when a
-1 gets interpreted as a large positive number, but operations are
bound to fail in all sorts of horrible ways when a number in the
upper-half of the size_t range is passed in -- this number is
unrepresentable as an ssize_t, so code that checks to see how many
bytes are actually written (which is mandatory if you are dealing
with certain types of devices) will get completely screwed up.
--ben
*/
typedef enum lstream_buffering
--------------------------------- snip -------------------------------------
3. in dumper.c, there are four places, all inside of switch()
statements, where XD_BYTECOUNT appears twice as a case tag. In
each case, the two case blocks contain identical code, and you
should *REMOVE THE SECOND* and leave the first.
| author | ben |
|---|---|
| date | Thu, 20 Sep 2001 06:31:11 +0000 |
| parents | b39c14581166 |
| children | a307f9a2021d |
line wrap: on
line source
/* Lisp functions for making directory listings. Copyright (C) 1985, 1986, 1992, 1993, 1994 Free Software Foundation, Inc. This file is part of XEmacs. XEmacs 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. XEmacs 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. You should have received a copy of the GNU General Public License along with XEmacs; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Synched up with: FSF 19.30. */ #include <config.h> #include "lisp.h" #include "sysfile.h" #include "sysdir.h" #include "systime.h" #include "sysdep.h" #include "syspwd.h" #include "buffer.h" #include "commands.h" #include "elhash.h" #include "regex.h" #include "opaque.h" #include "syntax.h" #ifdef WIN32_NATIVE #include "syswindows.h" #endif Lisp_Object Vcompletion_ignored_extensions; Lisp_Object Qdirectory_files; Lisp_Object Qfile_name_completion; Lisp_Object Qfile_name_all_completions; Lisp_Object Qfile_attributes; static Lisp_Object close_directory_unwind (Lisp_Object unwind_obj) { DIR *d = (DIR *)get_opaque_ptr (unwind_obj); closedir (d); free_opaque_ptr (unwind_obj); return Qnil; } DEFUN ("directory-files", Fdirectory_files, 1, 5, 0, /* Return a list of names of files in DIRECTORY. There are four optional arguments: If FULL is non-nil, absolute pathnames of the files are returned. If MATCH is non-nil, only pathnames containing that regexp are returned. If NOSORT is non-nil, the list is not sorted--its order is unpredictable. NOSORT is useful if you plan to sort the result yourself. If FILES-ONLY is the symbol t, then only the "files" in the directory will be returned; subdirectories will be excluded. If FILES-ONLY is not nil and not t, then only the subdirectories will be returned. Otherwise, if FILES-ONLY is nil (the default) then both files and subdirectories will be returned. */ (directory, full, match, nosort, files_only)) { /* This function can GC */ DIR *d; Lisp_Object list = Qnil; Bytecount directorylen; Lisp_Object handler; struct re_pattern_buffer *bufp = NULL; int speccount = specpdl_depth (); char *statbuf, *statbuf_tail; struct gcpro gcpro1, gcpro2; GCPRO2 (directory, list); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (directory, Qdirectory_files); if (!NILP (handler)) { UNGCPRO; if (!NILP (files_only)) return call6 (handler, Qdirectory_files, directory, full, match, nosort, files_only); else return call5 (handler, Qdirectory_files, directory, full, match, nosort); } /* #### why do we do Fexpand_file_name after file handlers here, but earlier everywhere else? */ directory = Fexpand_file_name (directory, Qnil); directory = Ffile_name_as_directory (directory); directorylen = XSTRING_LENGTH (directory); statbuf = (char *)alloca (directorylen + MAXNAMLEN + 1); memcpy (statbuf, XSTRING_DATA (directory), directorylen); statbuf_tail = statbuf + directorylen; /* XEmacs: this should come after Ffile_name_as_directory() to avoid potential regexp cache smashage. It comes before the opendir() because it might signal an error. */ if (!NILP (match)) { CHECK_STRING (match); /* MATCH might be a flawed regular expression. Rather than catching and signalling our own errors, we just call compile_pattern to do the work for us. */ bufp = compile_pattern (match, 0, Qnil, 0, ERROR_ME); } /* Now *bufp is the compiled form of MATCH; don't call anything which might compile a new regexp until we're done with the loop! */ /* Do this opendir after anything which might signal an error. NOTE: the above comment is old; previously, there was no unwind-protection in case of error, but now there is. */ d = opendir ((char *) XSTRING_DATA (directory)); if (!d) report_file_error ("Opening directory", directory); regex_match_object = Qt; regex_emacs_buffer = current_buffer; record_unwind_protect (close_directory_unwind, make_opaque_ptr ((void *)d)); /* Loop reading blocks */ while (1) { DIRENTRY *dp = readdir (d); int len; if (!dp) break; len = NAMLEN (dp); if (DIRENTRY_NONEMPTY (dp) && (NILP (match) || (0 <= re_search (bufp, dp->d_name, len, 0, len, 0)))) { if (!NILP (files_only)) { struct stat st; int dir_p = 0; memcpy (statbuf_tail, dp->d_name, len); statbuf_tail[len] = 0; if (xemacs_stat (statbuf, &st) == 0 && (st.st_mode & S_IFMT) == S_IFDIR) dir_p = 1; if (EQ (files_only, Qt) && dir_p) continue; else if (!EQ (files_only, Qt) && !dir_p) continue; } { Lisp_Object name = make_string ((Intbyte *)dp->d_name, len); if (!NILP (full)) name = concat2 (directory, name); list = Fcons (name, list); } } } unbind_to (speccount, Qnil); /* This will close the dir */ if (NILP (nosort)) list = Fsort (Fnreverse (list), Qstring_lessp); RETURN_UNGCPRO (list); } static Lisp_Object file_name_completion (Lisp_Object file, Lisp_Object directory, int all_flag, int ver_flag); DEFUN ("file-name-completion", Ffile_name_completion, 2, 2, 0, /* Complete file name PARTIAL-FILENAME in directory DIRECTORY. Return the longest prefix common to all file names in DIRECTORY that start with PARTIAL-FILENAME. If there is only one and PARTIAL-FILENAME matches it exactly, return t. Return nil if DIRECTORY contains no name starting with PARTIAL-FILENAME. File names which end with any member of `completion-ignored-extensions' are not considered as possible completions for PARTIAL-FILENAME unless there is no other possible completion. `completion-ignored-extensions' is not applied to the names of directories. */ (partial_filename, directory)) { /* This function can GC. GC checked 1996.04.06. */ Lisp_Object handler; /* If the directory name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (directory, Qfile_name_completion); if (!NILP (handler)) return call3 (handler, Qfile_name_completion, partial_filename, directory); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (partial_filename, Qfile_name_completion); if (!NILP (handler)) return call3 (handler, Qfile_name_completion, partial_filename, directory); return file_name_completion (partial_filename, directory, 0, 0); } DEFUN ("file-name-all-completions", Ffile_name_all_completions, 2, 2, 0, /* Return a list of all completions of PARTIAL-FILENAME in DIRECTORY. These are all file names in DIRECTORY which begin with PARTIAL-FILENAME. File names which end with any member of `completion-ignored-extensions' are not considered as possible completions for PARTIAL-FILENAME unless there is no other possible completion. `completion-ignored-extensions' is not applied to the names of directories. */ (partial_filename, directory)) { /* This function can GC. GC checked 1997.06.04. */ Lisp_Object handler; struct gcpro gcpro1; GCPRO1 (directory); directory = Fexpand_file_name (directory, Qnil); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (directory, Qfile_name_all_completions); UNGCPRO; if (!NILP (handler)) return call3 (handler, Qfile_name_all_completions, partial_filename, directory); return file_name_completion (partial_filename, directory, 1, 0); } static int file_name_completion_stat (Lisp_Object directory, DIRENTRY *dp, struct stat *st_addr) { Bytecount len = NAMLEN (dp); Bytecount pos = XSTRING_LENGTH (directory); int value; char *fullname = (char *) alloca (len + pos + 2); memcpy (fullname, XSTRING_DATA (directory), pos); if (!IS_DIRECTORY_SEP (fullname[pos - 1])) fullname[pos++] = DIRECTORY_SEP; memcpy (fullname + pos, dp->d_name, len); fullname[pos + len] = 0; #ifdef S_IFLNK /* We want to return success if a link points to a nonexistent file, but we want to return the status for what the link points to, in case it is a directory. */ value = lstat (fullname, st_addr); if (S_ISLNK (st_addr->st_mode)) xemacs_stat (fullname, st_addr); #else value = xemacs_stat (fullname, st_addr); #endif return value; } static Lisp_Object file_name_completion_unwind (Lisp_Object locative) { DIR *d; Lisp_Object obj = XCAR (locative); if (!NILP (obj)) { d = (DIR *)get_opaque_ptr (obj); closedir (d); free_opaque_ptr (obj); } free_cons (XCONS (locative)); return Qnil; } static Lisp_Object file_name_completion (Lisp_Object file, Lisp_Object directory, int all_flag, int ver_flag) { /* This function can GC */ DIR *d = 0; int matchcount = 0; Lisp_Object bestmatch = Qnil; Charcount bestmatchsize = 0; struct stat st; int passcount; int speccount = specpdl_depth (); Charcount file_name_length; Lisp_Object locative; struct gcpro gcpro1, gcpro2, gcpro3; GCPRO3 (file, directory, bestmatch); CHECK_STRING (file); #ifdef WIN32_NATIVE /* Filename completion on Windows ignores case, since Windows filesystems do. */ specbind (Qcompletion_ignore_case, Qt); #endif /* WIN32_NATIVE */ #ifdef FILE_SYSTEM_CASE file = FILE_SYSTEM_CASE (file); #endif directory = Fexpand_file_name (directory, Qnil); file_name_length = XSTRING_CHAR_LENGTH (file); /* With passcount = 0, ignore files that end in an ignored extension. If nothing found then try again with passcount = 1, don't ignore them. If looking for all completions, start with passcount = 1, so always take even the ignored ones. ** It would not actually be helpful to the user to ignore any possible completions when making a list of them.** */ /* We cannot use close_directory_unwind() because we change the directory. The old code used to just avoid signaling errors, and call closedir, but it was wrong, because it made sane handling of QUIT impossible and, besides, various utility functions like regexp_ignore_completion_p can signal errors. */ locative = noseeum_cons (Qnil, Qnil); record_unwind_protect (file_name_completion_unwind, locative); for (passcount = !!all_flag; NILP (bestmatch) && passcount < 2; passcount++) { d = opendir ((char *) XSTRING_DATA (Fdirectory_file_name (directory))); if (!d) report_file_error ("Opening directory", directory); XCAR (locative) = make_opaque_ptr ((void *)d); /* Loop reading blocks */ while (1) { DIRENTRY *dp; Bytecount len; /* scmp() works in characters, not bytes, so we have to compute this value: */ Charcount cclen; int directoryp; int ignored_extension_p = 0; Intbyte *d_name; dp = readdir (d); if (!dp) break; /* Cast to Intbyte* is OK, as readdir() Mule-encapsulates. */ d_name = (Intbyte *) dp->d_name; len = NAMLEN (dp); cclen = bytecount_to_charcount (d_name, len); QUIT; if (! DIRENTRY_NONEMPTY (dp) || cclen < file_name_length || 0 <= scmp (d_name, XSTRING_DATA (file), file_name_length)) continue; if (file_name_completion_stat (directory, dp, &st) < 0) continue; directoryp = ((st.st_mode & S_IFMT) == S_IFDIR); if (directoryp) { #ifndef TRIVIAL_DIRECTORY_ENTRY #define TRIVIAL_DIRECTORY_ENTRY(n) (!strcmp (n, ".") || !strcmp (n, "..")) #endif /* "." and ".." are never interesting as completions, but are actually in the way in a directory containing only one file. */ if (!passcount && TRIVIAL_DIRECTORY_ENTRY (dp->d_name)) continue; } else { /* Compare extensions-to-be-ignored against end of this file name */ /* if name is not an exact match against specified string. */ if (!passcount && cclen > file_name_length) { Lisp_Object tem; /* and exit this for loop if a match is found */ EXTERNAL_LIST_LOOP (tem, Vcompletion_ignored_extensions) { Lisp_Object elt = XCAR (tem); Charcount skip; CHECK_STRING (elt); skip = cclen - XSTRING_CHAR_LENGTH (elt); if (skip < 0) continue; if (0 > scmp (charptr_n_addr (d_name, skip), XSTRING_DATA (elt), XSTRING_CHAR_LENGTH (elt))) { ignored_extension_p = 1; break; } } } } /* If an ignored-extensions match was found, don't process this name as a completion. */ if (!passcount && ignored_extension_p) continue; if (!passcount && regexp_ignore_completion_p (d_name, Qnil, 0, cclen)) continue; /* Update computation of how much all possible completions match */ matchcount++; if (all_flag || NILP (bestmatch)) { Lisp_Object name = Qnil; struct gcpro ngcpro1; NGCPRO1 (name); /* This is a possible completion */ name = make_string (d_name, len); if (directoryp) /* Completion is a directory; end it with '/' */ name = Ffile_name_as_directory (name); if (all_flag) { bestmatch = Fcons (name, bestmatch); } else { bestmatch = name; bestmatchsize = XSTRING_CHAR_LENGTH (name); } NUNGCPRO; } else { Charcount compare = min (bestmatchsize, cclen); Intbyte *p1 = XSTRING_DATA (bestmatch); Intbyte *p2 = d_name; Charcount matchsize = scmp (p1, p2, compare); if (matchsize < 0) matchsize = compare; if (completion_ignore_case) { /* If this is an exact match except for case, use it as the best match rather than one that is not an exact match. This way, we get the case pattern of the actual match. */ if ((matchsize == cclen && matchsize + !!directoryp < XSTRING_CHAR_LENGTH (bestmatch)) || /* If there is no exact match ignoring case, prefer a match that does not change the case of the input. */ (((matchsize == cclen) == (matchsize + !!directoryp == XSTRING_CHAR_LENGTH (bestmatch))) /* If there is more than one exact match aside from case, and one of them is exact including case, prefer that one. */ && 0 > scmp_1 (p2, XSTRING_DATA (file), file_name_length, 0) && 0 <= scmp_1 (p1, XSTRING_DATA (file), file_name_length, 0))) { bestmatch = make_string (d_name, len); if (directoryp) bestmatch = Ffile_name_as_directory (bestmatch); } } /* If this directory all matches, see if implicit following slash does too. */ if (directoryp && compare == matchsize && bestmatchsize > matchsize && IS_ANY_SEP (charptr_emchar_n (p1, matchsize))) matchsize++; bestmatchsize = matchsize; } } closedir (d); free_opaque_ptr (XCAR (locative)); XCAR (locative) = Qnil; } unbind_to (speccount, Qnil); UNGCPRO; if (all_flag || NILP (bestmatch)) return bestmatch; if (matchcount == 1 && bestmatchsize == file_name_length) return Qt; return Fsubstring (bestmatch, Qzero, make_int (bestmatchsize)); } static Lisp_Object user_name_completion (Lisp_Object user, int all_flag, int *uniq); DEFUN ("user-name-completion", Fuser_name_completion, 1, 1, 0, /* Complete user name from PARTIAL-USERNAME. Return the longest prefix common to all user names starting with PARTIAL-USERNAME. If there is only one and PARTIAL-USERNAME matches it exactly, returns t. Return nil if there is no user name starting with PARTIAL-USERNAME. */ (partial_username)) { return user_name_completion (partial_username, 0, NULL); } DEFUN ("user-name-completion-1", Fuser_name_completion_1, 1, 1, 0, /* Complete user name from PARTIAL-USERNAME. This function is identical to `user-name-completion', except that the cons of the completion and an indication of whether the completion was unique is returned. The car of the returned value is the longest prefix common to all user names that start with PARTIAL-USERNAME. If there is only one and PARTIAL-USERNAME matches it exactly, the car is t. The car is nil if there is no user name starting with PARTIAL-USERNAME. The cdr of the result is non-nil if and only if the completion returned in the car was unique. */ (partial_username)) { int uniq; Lisp_Object completed = user_name_completion (partial_username, 0, &uniq); return Fcons (completed, uniq ? Qt : Qnil); } DEFUN ("user-name-all-completions", Fuser_name_all_completions, 1, 1, 0, /* Return a list of all user name completions from PARTIAL-USERNAME. These are all the user names which begin with PARTIAL-USERNAME. */ (partial_username)) { return user_name_completion (partial_username, 1, NULL); } struct user_name { Intbyte *ptr; Bytecount len; }; struct user_cache { struct user_name *user_names; int length; int size; EMACS_TIME last_rebuild_time; }; static struct user_cache user_cache; static void free_user_cache (struct user_cache *cache) { int i; for (i = 0; i < cache->length; i++) xfree (cache->user_names[i].ptr); xfree (cache->user_names); xzero (*cache); } static Lisp_Object user_name_completion_unwind (Lisp_Object cache_incomplete_p) { #ifndef WIN32_NATIVE endpwent (); speed_up_interrupts (); #endif if (! NILP (XCAR (cache_incomplete_p))) free_user_cache (&user_cache); free_cons (XCONS (cache_incomplete_p)); return Qnil; } #define USER_CACHE_TTL (24*60*60) /* Time to live: 1 day, in seconds */ static Lisp_Object user_name_completion (Lisp_Object user, int all_flag, int *uniq) { /* This function can GC */ int matchcount = 0; Lisp_Object bestmatch = Qnil; Charcount bestmatchsize = 0; Charcount user_name_length; EMACS_TIME t; int i; struct gcpro gcpro1, gcpro2; GCPRO2 (user, bestmatch); CHECK_STRING (user); user_name_length = XSTRING_CHAR_LENGTH (user); /* Cache user name lookups because it tends to be quite slow. * Rebuild the cache occasionally to catch changes */ EMACS_GET_TIME (t); if (user_cache.user_names && (EMACS_SECS (t) - EMACS_SECS (user_cache.last_rebuild_time) > USER_CACHE_TTL)) free_user_cache (&user_cache); if (!user_cache.user_names) { #ifndef WIN32_NATIVE struct passwd *pwd; #else DWORD entriesread; DWORD totalentries; DWORD resume_handle = 0; #endif Lisp_Object cache_incomplete_p = noseeum_cons (Qt, Qnil); int speccount = specpdl_depth (); record_unwind_protect (user_name_completion_unwind, cache_incomplete_p); #ifndef WIN32_NATIVE slow_down_interrupts (); setpwent (); while ((pwd = getpwent ())) { QUIT; DO_REALLOC (user_cache.user_names, user_cache.size, user_cache.length + 1, struct user_name); TO_INTERNAL_FORMAT (C_STRING, pwd->pw_name, MALLOC, (user_cache.user_names[user_cache.length].ptr, user_cache.user_names[user_cache.length].len), Qnative); user_cache.length++; } #else if (xNetUserEnum) { do { USER_INFO_0 *bufptr; NET_API_STATUS status_status_statui_statum_statu; int i; QUIT; status_status_statui_statum_statu = xNetUserEnum (NULL, 0, 0, (LPBYTE *) &bufptr, 1024, &entriesread, &totalentries, &resume_handle); if (status_status_statui_statum_statu != NERR_Success && status_status_statui_statum_statu != ERROR_MORE_DATA) invalid_operation ("Error enumerating users", make_int (GetLastError ())); for (i = 0; i < (int) entriesread; i++) { int nout = WideCharToMultiByte (CP_ACP, WC_COMPOSITECHECK, bufptr[i].usri0_name, -1, 0, 0, "~", 0); void *outp = alloca (nout); WideCharToMultiByte (CP_ACP, WC_COMPOSITECHECK, bufptr[i].usri0_name, -1, (LPSTR) outp, nout, "~", 0); DO_REALLOC (user_cache.user_names, user_cache.size, user_cache.length + 1, struct user_name); TO_INTERNAL_FORMAT (C_STRING, outp, MALLOC, (user_cache. user_names[user_cache.length].ptr, user_cache. user_names[user_cache.length].len), Qmswindows_tstr); user_cache.length++; } xNetApiBufferFree (bufptr); } while (entriesread != totalentries); } else /* Win 9x */ { Extbyte name[2 * (UNLEN + 1)]; DWORD length = sizeof (name); if (GetUserName (name, &length)) { DO_REALLOC (user_cache.user_names, user_cache.size, user_cache.length + 1, struct user_name); TO_INTERNAL_FORMAT (C_STRING, name, MALLOC, (user_cache. user_names[user_cache.length].ptr, user_cache. user_names[user_cache.length].len), Qmswindows_tstr); user_cache.length++; } } #endif XCAR (cache_incomplete_p) = Qnil; unbind_to (speccount, Qnil); EMACS_GET_TIME (user_cache.last_rebuild_time); } for (i = 0; i < user_cache.length; i++) { Intbyte *u_name = user_cache.user_names[i].ptr; Bytecount len = user_cache.user_names[i].len; /* scmp() works in chars, not bytes, so we have to compute this: */ Charcount cclen = bytecount_to_charcount (u_name, len); QUIT; if (cclen < user_name_length || 0 <= scmp_1 (u_name, XSTRING_DATA (user), user_name_length, 0)) continue; matchcount++; /* count matching completions */ if (all_flag || NILP (bestmatch)) { Lisp_Object name = Qnil; struct gcpro ngcpro1; NGCPRO1 (name); /* This is a possible completion */ name = make_string (u_name, len); if (all_flag) { bestmatch = Fcons (name, bestmatch); } else { bestmatch = name; bestmatchsize = XSTRING_CHAR_LENGTH (name); } NUNGCPRO; } else { Charcount compare = min (bestmatchsize, cclen); Intbyte *p1 = XSTRING_DATA (bestmatch); Intbyte *p2 = u_name; Charcount matchsize = scmp_1 (p1, p2, compare, 0); if (matchsize < 0) matchsize = compare; bestmatchsize = matchsize; } } UNGCPRO; if (uniq) *uniq = (matchcount == 1); if (all_flag || NILP (bestmatch)) return bestmatch; if (matchcount == 1 && bestmatchsize == user_name_length) return Qt; return Fsubstring (bestmatch, Qzero, make_int (bestmatchsize)); } Lisp_Object make_directory_hash_table (const char *path) { DIR *d; if ((d = opendir (path))) { DIRENTRY *dp; Lisp_Object hash = make_lisp_hash_table (20, HASH_TABLE_NON_WEAK, HASH_TABLE_EQUAL); while ((dp = readdir (d))) { Bytecount len = NAMLEN (dp); if (DIRENTRY_NONEMPTY (dp)) /* Cast to Intbyte* is OK, as readdir() Mule-encapsulates. */ Fputhash (make_string ((Intbyte *) dp->d_name, len), Qt, hash); } closedir (d); return hash; } else return Qnil; } Lisp_Object wasteful_word_to_lisp (unsigned int item) { /* Compatibility: in other versions, file-attributes returns a LIST of two 16 bit integers... */ Lisp_Object cons = word_to_lisp (item); XCDR (cons) = Fcons (XCDR (cons), Qnil); return cons; } DEFUN ("file-attributes", Ffile_attributes, 1, 1, 0, /* Return a list of attributes of file FILENAME. Value is nil if specified file cannot be opened. Otherwise, list elements are: 0. t for directory, string (name linked to) for symbolic link, or nil. 1. Number of links to file. 2. File uid. 3. File gid. 4. Last access time, as a list of two integers. First integer has high-order 16 bits of time, second has low 16 bits. 5. Last modification time, likewise. 6. Last status change time, likewise. 7. Size in bytes. (-1, if number is out of range). 8. File modes, as a string of ten letters or dashes as in ls -l. 9. t iff file's gid would change if file were deleted and recreated. 10. inode number. 11. Device number. If file does not exist, returns nil. */ (filename)) { /* This function can GC. GC checked 1997.06.04. */ Lisp_Object values[12]; Lisp_Object directory = Qnil; struct stat s; char modes[10]; Lisp_Object handler; struct gcpro gcpro1, gcpro2; GCPRO2 (filename, directory); filename = Fexpand_file_name (filename, Qnil); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (filename, Qfile_attributes); if (!NILP (handler)) { UNGCPRO; return call2 (handler, Qfile_attributes, filename); } if (lstat ((char *) XSTRING_DATA (filename), &s) < 0) { UNGCPRO; return Qnil; } #ifdef BSD4_2 directory = Ffile_name_directory (filename); #endif #if 0 /* #### shouldn't this apply to WIN32_NATIVE and maybe CYGWIN? */ { char *tmpnam = (char *) XSTRING_DATA (Ffile_name_nondirectory (filename)); int l = strlen (tmpnam); if (l >= 5 && S_ISREG (s.st_mode) && (stricmp (&tmpnam[l - 4], ".com") == 0 || stricmp (&tmpnam[l - 4], ".exe") == 0 || stricmp (&tmpnam[l - 4], ".bat") == 0)) { s.st_mode |= S_IEXEC; } } #endif switch (s.st_mode & S_IFMT) { default: values[0] = Qnil; break; case S_IFDIR: values[0] = Qt; break; #ifdef S_IFLNK case S_IFLNK: values[0] = Ffile_symlink_p (filename); break; #endif } values[1] = make_int (s.st_nlink); values[2] = make_int (s.st_uid); values[3] = make_int (s.st_gid); values[4] = wasteful_word_to_lisp (s.st_atime); values[5] = wasteful_word_to_lisp (s.st_mtime); values[6] = wasteful_word_to_lisp (s.st_ctime); values[7] = make_int ((EMACS_INT) s.st_size); /* If the size is out of range, give back -1. */ /* #### Fix when Emacs gets bignums! */ if (XINT (values[7]) != s.st_size) values[7] = make_int (-1); filemodestring (&s, modes); values[8] = make_string ((Intbyte *) modes, 10); #if defined (BSD4_2) || defined (BSD4_3) /* file gid will be dir gid */ { struct stat sdir; if (!NILP (directory) && xemacs_stat ((char *) XSTRING_DATA (directory), &sdir) == 0) values[9] = (sdir.st_gid != s.st_gid) ? Qt : Qnil; else /* if we can't tell, assume worst */ values[9] = Qt; } #else /* file gid will be egid */ values[9] = (s.st_gid != getegid ()) ? Qt : Qnil; #endif /* BSD4_2 or BSD4_3 */ values[10] = make_int (s.st_ino); values[11] = make_int (s.st_dev); UNGCPRO; return Flist (countof (values), values); } /************************************************************************/ /* initialization */ /************************************************************************/ void syms_of_dired (void) { DEFSYMBOL (Qdirectory_files); DEFSYMBOL (Qfile_name_completion); DEFSYMBOL (Qfile_name_all_completions); DEFSYMBOL (Qfile_attributes); DEFSUBR (Fdirectory_files); DEFSUBR (Ffile_name_completion); DEFSUBR (Ffile_name_all_completions); DEFSUBR (Fuser_name_completion); DEFSUBR (Fuser_name_completion_1); DEFSUBR (Fuser_name_all_completions); DEFSUBR (Ffile_attributes); } void vars_of_dired (void) { DEFVAR_LISP ("completion-ignored-extensions", &Vcompletion_ignored_extensions /* *Completion ignores filenames ending in any string in this list. This variable does not affect lists of possible completions, but does affect the commands that actually do completions. It is used by the functions `file-name-completion' and `file-name-all-completions'. */ ); Vcompletion_ignored_extensions = Qnil; }