/* Lisp functions for making directory listings.
Copyright (C) 1985, 1986, 1993, 1994, 1999, 2000, 2001, 2002, 2003,
- 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+ 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
This file is part of GNU Emacs.
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <setjmp.h>
#ifdef HAVE_PWD_H
#include <pwd.h>
extern int completion_ignore_case;
extern Lisp_Object Qcompletion_ignore_case;
extern Lisp_Object Vcompletion_regexp_list;
+extern Lisp_Object Vw32_get_true_file_attributes;
Lisp_Object Vcompletion_ignored_extensions;
Lisp_Object Qdirectory_files;
static int scmp P_ ((unsigned char *, unsigned char *, int));
\f
+#ifdef WINDOWSNT
+Lisp_Object
+directory_files_internal_w32_unwind (Lisp_Object arg)
+{
+ Vw32_get_true_file_attributes = arg;
+ return Qnil;
+}
+#endif
Lisp_Object
directory_files_internal_unwind (dh)
int count = SPECPDL_INDEX ();
struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
DIRENTRY *dp;
+#ifdef WINDOWSNT
+ Lisp_Object w32_save = Qnil;
+#endif
/* Because of file name handlers, these functions might call
Ffuncall, and cause a GC. */
record_unwind_protect (directory_files_internal_unwind,
make_save_value (d, 0));
+#ifdef WINDOWSNT
+ if (attrs)
+ {
+ extern Lisp_Object Qlocal;
+ extern int is_slow_fs (const char *);
+
+ /* Do this only once to avoid doing it (in w32.c:stat) for each
+ file in the directory, when we call Ffile_attributes below. */
+ record_unwind_protect (directory_files_internal_w32_unwind,
+ Vw32_get_true_file_attributes);
+ w32_save = Vw32_get_true_file_attributes;
+ if (EQ (Vw32_get_true_file_attributes, Qlocal))
+ {
+ /* w32.c:stat will notice these bindings and avoid calling
+ GetDriveType for each file. */
+ if (is_slow_fs (SDATA (dirfilename)))
+ Vw32_get_true_file_attributes = Qnil;
+ else
+ Vw32_get_true_file_attributes = Qt;
+ }
+ }
+#endif
+
directory_nbytes = SBYTES (directory);
re_match_object = Qt;
BLOCK_INPUT;
closedir (d);
UNBLOCK_INPUT;
+#ifdef WINDOWSNT
+ if (attrs)
+ Vw32_get_true_file_attributes = w32_save;
+#endif
/* Discard the unwind protect. */
specpdl_ptr = specpdl + count;
that are relative to the specified directory.
If MATCH is non-nil, mention only file names that match the regexp MATCH.
If NOSORT is non-nil, the list is not sorted--its order is unpredictable.
- Otherwise, the list returned is sorted with `stringp-lessp'.
- NOSORT is useful if you plan to sort the result yourself. */)
+ Otherwise, the list returned is sorted with `string-lessp'.
+ NOSORT is useful if you plan to sort the result yourself. */)
(directory, full, match, nosort)
Lisp_Object directory, full, match, nosort;
{
if (!all_flag)
{
int skip;
+
+#if 0 /* FIXME: The `scmp' call compares an encoded and a decoded string. */
+ /* If this entry matches the current bestmatch, the only
+ thing it can do is increase matchcount, so don't bother
+ investigating it any further. */
+ if (!completion_ignore_case
+ /* The return result depends on whether it's the sole match. */
+ && matchcount > 1
+ && !includeall /* This match may allow includeall to 0. */
+ && len >= bestmatchsize
+ && 0 > scmp (dp->d_name, SDATA (bestmatch), bestmatchsize))
+ continue;
+#endif
+
if (directoryp)
{
#ifndef TRIVIAL_DIRECTORY_ENTRY
/* This tests that the current file is an exact match
but BESTMATCH is not (it is too long). */
if ((matchsize == SCHARS (name)
- && matchsize + !!directoryp
- < SCHARS (bestmatch))
+ && matchsize + !!directoryp < SCHARS (bestmatch))
||
/* If there is no exact match ignoring case,
prefer a match that does not change the case
bestmatch = name;
}
bestmatchsize = matchsize;
+
+ /* If the best completion so far is reduced to the string
+ we're trying to complete, then we already know there's no
+ other completion, so there's no point looking any further. */
+ if (matchsize <= SCHARS (file)
+ && !includeall /* A future match may allow includeall to 0. */
+ /* If completion-ignore-case is non-nil, don't
+ short-circuit because we want to find the best
+ possible match *including* case differences. */
+ && (!completion_ignore_case || matchsize == 0)
+ /* The return value depends on whether it's the sole match. */
+ && matchcount > 1)
+ break;
+
}
}
char *fullname = (char *) alloca (len + pos + 2);
#ifdef MSDOS
-#if __DJGPP__ > 1
/* Some fields of struct stat are *very* expensive to compute on MS-DOS,
but aren't required here. Avoid computing the following fields:
st_inode, st_size and st_nlink for directories, and the execute bits
unsigned short save_djstat_flags = _djstat_flags;
_djstat_flags = _STAT_INODE | _STAT_EXEC_MAGIC | _STAT_DIRSIZE;
-#endif /* __DJGPP__ > 1 */
#endif /* MSDOS */
bcopy (SDATA (dirname), fullname, pos);
#else
value = stat (fullname, st_addr);
#ifdef MSDOS
-#if __DJGPP__ > 1
_djstat_flags = save_djstat_flags;
-#endif /* __DJGPP__ > 1 */
#endif /* MSDOS */
return value;
#endif /* S_IFLNK */
Elements of the attribute list are:
0. t for directory, string (name linked to) for symbolic link, or nil.
1. Number of links to file.
- 2. File uid as a string or an integer. If a string value cannot be
- looked up, the integer value is returned.
+ 2. File uid as a string or a number. If a string value cannot be
+ looked up, a numeric value, either an integer or a float, is returned.
3. File gid, likewise.
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.
+ (See a note below about access time on FAT-based filesystems.)
+ 5. Last modification time, likewise. This is the time of the last
+ change to the file's contents.
+ 6. Last status change time, likewise. This is the time of last change
+ to the file's attributes: owner and group, access mode bits, etc.
7. Size in bytes.
This is a floating point number if the size is too large for an integer.
8. File modes, as a string of ten letters or dashes as in ls -l.
9. t if file's gid would change if file were deleted and recreated.
-10. inode number. If inode number is larger than the Emacs integer,
- but still fits into a 32-bit number, this is a cons cell containing two
- integers: first the high part, then the low 16 bits. If the inode number
- is wider than 32 bits, this is a cons cell containing three integers:
- first the high 24 bits, then middle 24 bits, and finally the low 16 bits.
-11. Device number. If it is larger than the Emacs integer, this is
- a cons cell, similar to the inode number.
+10. inode number. If inode number is larger than what Emacs integer
+ can hold, but still fits into a 32-bit number, this is a cons cell
+ containing two integers: first the high part, then the low 16 bits.
+ If the inode number is wider than 32 bits, this is of the form
+ (HIGH MIDDLE . LOW): first the high 24 bits, then middle 24 bits,
+ and finally the low 16 bits.
+11. Filesystem device number. If it is larger than what the Emacs
+ integer can hold, this is a cons cell, similar to the inode number.
+
+On most filesystems, the combination of the inode and the device
+number uniquely identifies the file.
On MS-Windows, performance depends on `w32-get-true-file-attributes',
-which see. */)
+which see.
+
+On some FAT-based filesystems, only the date of last access is recorded,
+so last access time will always be midnight of that day. */)
(filename, id_format)
Lisp_Object filename, id_format;
{
char modes[10];
Lisp_Object handler;
struct gcpro gcpro1;
- EMACS_INT ino, uid, gid;
- char *uname, *gname;
+ char *uname = NULL, *gname = NULL;
filename = Fexpand_file_name (filename, Qnil);
#endif
}
values[1] = make_number (s.st_nlink);
- uid = s.st_uid;
- gid = s.st_gid;
- if (NILP (id_format) || EQ (id_format, Qinteger))
- {
- values[2] = make_fixnum_or_float (uid);
- values[3] = make_fixnum_or_float (gid);
- }
- else
+
+ if (!(NILP (id_format) || EQ (id_format, Qinteger)))
{
BLOCK_INPUT;
uname = stat_uname (&s);
- values[2] = (uname ? build_string (uname)
- : make_fixnum_or_float (uid));
gname = stat_gname (&s);
- values[3] = (gname ? build_string (gname)
- : make_fixnum_or_float (gid));
UNBLOCK_INPUT;
}
+ if (uname)
+ values[2] = DECODE_SYSTEM (build_string (uname));
+ else
+ values[2] = make_fixnum_or_float (s.st_uid);
+ if (gname)
+ values[3] = DECODE_SYSTEM (build_string (gname));
+ else
+ values[3] = make_fixnum_or_float (s.st_gid);
+
values[4] = make_time (s.st_atime);
values[5] = make_time (s.st_mtime);
values[6] = make_time (s.st_ctime);
- values[7] = make_number (s.st_size);
- /* If the size is out of range for an integer, return a float. */
- if (XINT (values[7]) != s.st_size)
- values[7] = make_float ((double)s.st_size);
+ values[7] = make_fixnum_or_float (s.st_size);
/* If the size is negative, and its type is long, convert it back to
positive. */
if (s.st_size < 0 && sizeof (s.st_size) == sizeof (long))
#else /* file gid will be egid */
values[9] = (s.st_gid != getegid ()) ? Qt : Qnil;
#endif /* BSD4_2 (or BSD4_3) */
- /* Shut up GCC warnings in FIXNUM_OVERFLOW_P below. */
- if (sizeof (s.st_ino) > sizeof (ino))
- ino = (EMACS_INT)(s.st_ino & 0xffffffff);
- else
- ino = s.st_ino;
- if (!FIXNUM_OVERFLOW_P (ino)
- && (sizeof (s.st_ino) <= sizeof (ino) || (s.st_ino & ~INTMASK) == 0))
+ if (!FIXNUM_OVERFLOW_P (s.st_ino))
/* Keep the most common cases as integers. */
- values[10] = make_number (ino);
- else if (sizeof (s.st_ino) <= sizeof (ino)
- || ((s.st_ino >> 16) & ~INTMASK) == 0)
+ values[10] = make_number (s.st_ino);
+ else if (!FIXNUM_OVERFLOW_P (s.st_ino >> 16))
/* To allow inode numbers larger than VALBITS, separate the bottom
16 bits. */
values[10] = Fcons (make_number ((EMACS_INT)(s.st_ino >> 16)),
make_number (low_ino & 0xffff)));
}
- /* Likewise for device, but don't let it become negative. We used
- to use FIXNUM_OVERFLOW_P here, but that won't catch large
- positive numbers such as 0xFFEEDDCC. */
- if ((EMACS_INT)s.st_dev < 0
- || (EMACS_INT)s.st_dev > MOST_POSITIVE_FIXNUM)
+ /* Likewise for device. */
+ if (FIXNUM_OVERFLOW_P (s.st_dev))
values[11] = Fcons (make_number (s.st_dev >> 16),
make_number (s.st_dev & 0xffff));
else
void
syms_of_dired ()
{
- Qdirectory_files = intern ("directory-files");
- Qdirectory_files_and_attributes = intern ("directory-files-and-attributes");
- Qfile_name_completion = intern ("file-name-completion");
- Qfile_name_all_completions = intern ("file-name-all-completions");
- Qfile_attributes = intern ("file-attributes");
- Qfile_attributes_lessp = intern ("file-attributes-lessp");
- Qdefault_directory = intern ("default-directory");
+ Qdirectory_files = intern_c_string ("directory-files");
+ Qdirectory_files_and_attributes = intern_c_string ("directory-files-and-attributes");
+ Qfile_name_completion = intern_c_string ("file-name-completion");
+ Qfile_name_all_completions = intern_c_string ("file-name-all-completions");
+ Qfile_attributes = intern_c_string ("file-attributes");
+ Qfile_attributes_lessp = intern_c_string ("file-attributes-lessp");
+ Qdefault_directory = intern_c_string ("default-directory");
staticpro (&Qdirectory_files);
staticpro (&Qdirectory_files_and_attributes);
HCoop / bpt / emacs.git / blobdiff