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date Mon, 13 Aug 2007 11:28:15 +0200
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1 /* fast dired replacement routines for mswindows.
2 Copyright (C) 1998 Darryl Okahata
3 Portions Copyright (C) 1992, 1994 by Sebastian Kremer <sk@thp.uni-koeln.de>
4
5 This file is part of XEmacs.
6
7 XEmacs is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 2, or (at your option) any
10 later version.
11
12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with XEmacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 /* Synched up with: Not in FSF. */
23
24 /*
25 * Parts of this code (& comments) were taken from ls-lisp.el
26 * Author: Sebastian Kremer <sk@thp.uni-koeln.de>
27 */
28
29 /*
30 * insert-directory
31 * - must insert _exactly_one_line_ describing FILE if WILDCARD and
32 * FULL-DIRECTORY-P is nil.
33 * The single line of output must display FILE's name as it was
34 * given, namely, an absolute path name.
35 * - must insert exactly one line for each file if WILDCARD or
36 * FULL-DIRECTORY-P is t, plus one optional "total" line
37 * before the file lines, plus optional text after the file lines.
38 * Lines are delimited by "\n", so filenames containing "\n" are not
39 * allowed.
40 * File lines should display the basename.
41 * - must be consistent with
42 * - functions dired-move-to-filename, (these two define what a file line is)
43 * dired-move-to-end-of-filename,
44 * dired-between-files, (shortcut for (not (dired-move-to-filename)))
45 * dired-insert-headerline
46 * dired-after-subdir-garbage (defines what a "total" line is)
47 * - variable dired-subdir-regexp
48 */
49
50 /*
51 * Insert directory listing for FILE, formatted according to SWITCHES.
52 * Leaves point after the inserted text.
53 * SWITCHES may be a string of options, or a list of strings.
54 * Optional third arg WILDCARD means treat FILE as shell wildcard.
55 * Optional fourth arg FULL-DIRECTORY-P means file is a directory and
56 * switches do not contain `d', so that a full listing is expected.
57 *
58 * This works by running a directory listing program
59 * whose name is in the variable `insert-directory-program'.
60 * If WILDCARD, it also runs the shell specified by `shell-file-name'."
61 */
62
63 /*
64 * Set INDENT_LISTING to non-zero if the inserted text should be shifted
65 * over by two spaces.
66 */
67 #define INDENT_LISTING 0
68
69 #define ROUND_FILE_SIZES 4096
70
71
72 #include <config.h>
73 #include "lisp.h"
74
75 #include "buffer.h"
76 #include "regex.h"
77
78 #include "sysdir.h"
79 #include "sysfile.h"
80 #include "sysproc.h"
81
82 #include <windows.h>
83 #include <limits.h>
84 #include <time.h>
85
86 #include <winsock.h> /* To make nt.h happy */
87 #include "nt.h" /* For prototypes */
88
89 #if ROUND_FILE_SIZES > 0
90 #include <math.h> /* for floor() */
91 #endif
92
93
94 static int mswindows_ls_sort_case_insensitive;
95 static int mswindows_ls_round_file_size;
96
97 Lisp_Object Qmswindows_insert_directory;
98
99 extern Lisp_Object Vmswindows_downcase_file_names; /* in device-msw.c */
100
101
102
103 enum mswindows_sortby {
104 MSWINDOWS_SORT_BY_NAME,
105 MSWINDOWS_SORT_BY_NAME_NOCASE,
106 MSWINDOWS_SORT_BY_MOD_DATE,
107 MSWINDOWS_SORT_BY_SIZE
108 };
109
110
111 static enum mswindows_sortby mswindows_sort_method;
112 static int mswindows_reverse_sort;
113
114
115 #define CMPDWORDS(t1a, t1b, t2a, t2b) \
116 (((t1a) == (t2a)) ? (((t1b) == (t2b)) ? 0 : (((t1b) < (t2b)) ? -1 : 1)) \
117 : (((t1a) < (t2a)) ? -1 : 1))
118
119
120 static int
121 mswindows_ls_sort_fcn (const void *elem1, const void *elem2)
122 {
123 WIN32_FIND_DATA *e1, *e2;
124 int status;
125
126 e1 = *(WIN32_FIND_DATA **)elem1;
127 e2 = *(WIN32_FIND_DATA **)elem2;
128 switch (mswindows_sort_method)
129 {
130 case MSWINDOWS_SORT_BY_NAME:
131 status = strcmp(e1->cFileName, e2->cFileName);
132 break;
133 case MSWINDOWS_SORT_BY_NAME_NOCASE:
134 status = _stricmp(e1->cFileName, e2->cFileName);
135 break;
136 case MSWINDOWS_SORT_BY_MOD_DATE:
137 status = CMPDWORDS(e1->ftLastWriteTime.dwHighDateTime,
138 e1->ftLastWriteTime.dwLowDateTime,
139 e2->ftLastWriteTime.dwHighDateTime,
140 e2->ftLastWriteTime.dwLowDateTime);
141 break;
142 case MSWINDOWS_SORT_BY_SIZE:
143 status = CMPDWORDS(e1->nFileSizeHigh, e1->nFileSizeLow,
144 e2->nFileSizeHigh, e2->nFileSizeLow);
145 break;
146 default:
147 status = 0;
148 break;
149 }
150 if (mswindows_reverse_sort)
151 {
152 status = -status;
153 }
154 return (status);
155 }
156
157
158 static void
159 mswindows_sort_files (WIN32_FIND_DATA **files, int nfiles,
160 enum mswindows_sortby sort_by, int reverse)
161 {
162 mswindows_sort_method = sort_by;
163 mswindows_reverse_sort = reverse;
164 qsort(files, nfiles, sizeof(WIN32_FIND_DATA *), mswindows_ls_sort_fcn);
165 }
166
167
168 static WIN32_FIND_DATA *
169 mswindows_get_files (char *dirfile, int nowild, Lisp_Object pattern,
170 int hide_dot, int hide_system, int *nfiles)
171 {
172 WIN32_FIND_DATA *files;
173 int array_size;
174 struct re_pattern_buffer *bufp = NULL;
175 int findex, len;
176 char win32pattern[MAXNAMLEN+3];
177 HANDLE fh;
178
179 /*
180 * Much of the following code and comments were taken from dired.c.
181 * Yes, this is something of a waste, but we want speed, speed, SPEED.
182 */
183 files = NULL;
184 array_size = *nfiles = 0;
185 while (1)
186 {
187 if (!NILP(pattern))
188 {
189 /* PATTERN might be a flawed regular expression. Rather than
190 catching and signalling our own errors, we just call
191 compile_pattern to do the work for us. */
192 bufp = compile_pattern (pattern, 0, 0, 0, ERROR_ME);
193 }
194 /* Now *bufp is the compiled form of PATTERN; don't call anything
195 which might compile a new regexp until we're done with the loop! */
196
197 /* Initialize file info array */
198 array_size = 100; /* initial size */
199 files = xmalloc(array_size * sizeof (WIN32_FIND_DATA));
200
201 /* for Win32, we need to insure that the pathname ends with "\*". */
202 strcpy (win32pattern, dirfile);
203 if (!nowild)
204 {
205 len = strlen (win32pattern) - 1;
206 if (!IS_DIRECTORY_SEP (win32pattern[len]))
207 strcat (win32pattern, "\\");
208 strcat (win32pattern, "*");
209 }
210
211 /*
212 * Here, we use FindFirstFile()/FindNextFile() instead of opendir(),
213 * stat(), & friends, because stat() is VERY expensive in terms of
214 * time. Hence, we take the time to write complicated Win32-specific
215 * code, instead of simple Unix-style stuff.
216 */
217 findex = 0;
218 fh = INVALID_HANDLE_VALUE;
219
220 while (1)
221 {
222 int len;
223 char *filename;
224 int result;
225
226 if (fh == INVALID_HANDLE_VALUE)
227 {
228 fh = FindFirstFile(win32pattern, &files[findex]);
229 if (fh == INVALID_HANDLE_VALUE)
230 {
231 report_file_error ("Opening directory",
232 list1(build_string(dirfile)));
233 }
234 }
235 else
236 {
237 if (!FindNextFile(fh, &files[findex]))
238 {
239 if (GetLastError() == ERROR_NO_MORE_FILES)
240 {
241 break;
242 }
243 FindClose(fh);
244 report_file_error ("Reading directory",
245 list1(build_string(dirfile)));
246 }
247 }
248
249 filename = files[findex].cFileName;
250 if (!NILP(Vmswindows_downcase_file_names))
251 {
252 strlwr(filename);
253 }
254 len = strlen(filename);
255 result = (NILP(pattern)
256 || (0 <= re_search (bufp, filename,
257 len, 0, len, 0)));
258 if (result)
259 {
260 if ( ! (filename[0] == '.' &&
261 ((hide_system && (filename[1] == '\0' ||
262 (filename[1] == '.' &&
263 filename[2] == '\0'))) ||
264 hide_dot)))
265 {
266 if (++findex >= array_size)
267 {
268 array_size = findex * 2;
269 files = xrealloc(files,
270 array_size * sizeof(WIN32_FIND_DATA));
271 }
272 }
273 }
274 }
275 if (fh != INVALID_HANDLE_VALUE)
276 {
277 FindClose (fh);
278 }
279 *nfiles = findex;
280 break;
281 }
282 return (files);
283 }
284
285
286 static void
287 mswindows_format_file (WIN32_FIND_DATA *file, char *buf, int display_size,
288 int add_newline)
289 {
290 char *cptr;
291 int len;
292 Lisp_Object luser;
293 double file_size;
294
295 len = strlen(file->cFileName);
296 file_size =
297 file->nFileSizeHigh * (double)UINT_MAX + file->nFileSizeLow;
298 cptr = buf;
299 #if INDENT_LISTING
300 *cptr++ = ' ';
301 *cptr++ = ' ';
302 #endif
303 if (display_size)
304 {
305 sprintf(cptr, "%6d ", (int)((file_size + 1023.) / 1024.));
306 cptr += 7;
307 }
308 if (file->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
309 {
310 *cptr++ = 'd';
311 } else {
312 *cptr++ = '-';
313 }
314 cptr[0] = cptr[3] = cptr[6] = 'r';
315 if (file->dwFileAttributes & FILE_ATTRIBUTE_READONLY)
316 {
317 cptr[1] = cptr[4] = cptr[7] = '-';
318 } else {
319 cptr[1] = cptr[4] = cptr[7] = 'w';
320 }
321 if ((file->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ||
322 (len > 4 &&
323 (_stricmp(&file->cFileName[len - 4], ".exe") == 0
324 || _stricmp(&file->cFileName[len - 4], ".com") == 0
325 || _stricmp(&file->cFileName[len - 4], ".bat") == 0
326 #if 0
327 || _stricmp(&file->cFileName[len - 4], ".pif") == 0
328 #endif
329 )))
330 {
331 cptr[2] = cptr[5] = cptr[8] = 'x';
332 } else {
333 cptr[2] = cptr[5] = cptr[8] = '-';
334 }
335 cptr += 9;
336 if (file->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
337 {
338 strcpy(cptr, " 2 ");
339 } else {
340 strcpy(cptr, " 1 ");
341 }
342 cptr += 5;
343 luser = Fuser_login_name(Qnil);
344 if (!STRINGP(luser))
345 {
346 sprintf(cptr, "%-9d", 0);
347 } else {
348 char *str;
349
350 str = XSTRING_DATA(luser);
351 sprintf(cptr, "%-8s ", str);
352 }
353 while (*cptr)
354 {
355 ++cptr;
356 }
357 sprintf(cptr, "%-8d ", getgid());
358 cptr += 9;
359 if (file_size > 99999999.0)
360 {
361 file_size = (file_size + 1023.0) / 1024.;
362 if (file_size > 999999.0)
363 {
364 sprintf(cptr, "%6.0fMB ", (file_size + 1023.0) / 1024.);
365 } else {
366 sprintf(cptr, "%6.0fKB ", file_size);
367 }
368 } else {
369 sprintf(cptr, "%8.0f ", file_size);
370 }
371 while (*cptr)
372 {
373 ++cptr;
374 }
375 {
376 time_t t, now;
377 char *ctimebuf;
378 extern char *sys_ctime(const time_t *t); /* in nt.c */
379
380 if (
381 #if 0
382 /*
383 * This doesn't work.
384 * This code should be correct ...
385 */
386 FileTimeToLocalFileTime(&file->ftLastWriteTime, &localtime) &&
387 ((t = convert_time(localtime)) != 0) &&
388 #else
389 /*
390 * But this code "works" ...
391 */
392 ((t = convert_time(file->ftLastWriteTime)) != 0) &&
393 #endif
394 ((ctimebuf = sys_ctime(&t)) != NULL))
395 {
396 memcpy(cptr, &ctimebuf[4], 7);
397 now = time(NULL);
398 if (now - t > (365. / 2.0) * 86400.)
399 {
400 /* more than 6 months */
401 cptr[7] = ' ';
402 memcpy(&cptr[8], &ctimebuf[20], 4);
403 } else {
404 /* less than 6 months */
405 memcpy(&cptr[7], &ctimebuf[11], 5);
406 }
407 cptr += 12;
408 *cptr++ = ' ';
409 }
410 }
411 if (add_newline)
412 {
413 sprintf(cptr, "%s\n", file->cFileName);
414 }
415 else
416 {
417 strcpy(cptr, file->cFileName);
418 }
419 }
420
421
422 DEFUN ("mswindows-insert-directory", Fmswindows_insert_directory, 2, 4, 0, /*
423 Insert directory listing for FILE, formatted according to SWITCHES.
424 Leaves point after the inserted text.
425 SWITCHES may be a string of options, or a list of strings.
426 Optional third arg WILDCARD means treat FILE as shell wildcard.
427 Optional fourth arg FULL-DIRECTORY-P means file is a directory and
428 switches do not contain `d', so that a full listing is expected.
429 */
430 (file, switches, wildcard, full_directory_p))
431 {
432 Lisp_Object result, handler, wildpat, fns, basename;
433 char *filename;
434 char *switchstr;
435 int len, nfiles, i;
436 int hide_system, hide_dot, reverse, display_size;
437 WIN32_FIND_DATA *files, **sorted_files;
438 enum mswindows_sortby sort_by;
439 char fmtbuf[MAXNAMLEN+100]; /* larger than necessary */
440 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
441
442 result = Qnil;
443 wildpat = Qnil;
444 fns = Qnil;
445 basename = Qnil;
446 GCPRO5(result, file, wildpat, fns, basename);
447 sorted_files = NULL;
448 switchstr = NULL;
449 hide_system = 1;
450 hide_dot = 1;
451 display_size = 0;
452 reverse = 0;
453 sort_by = (mswindows_ls_sort_case_insensitive
454 ? MSWINDOWS_SORT_BY_NAME_NOCASE
455 : MSWINDOWS_SORT_BY_NAME);
456 nfiles = 0;
457 while (1)
458 {
459 handler = Ffind_file_name_handler (file, Qmswindows_insert_directory);
460 if (!NILP(handler))
461 {
462 result = call5(handler, Qmswindows_insert_directory, file, switches,
463 wildcard, full_directory_p);
464 break;
465 }
466 CHECK_STRING (file);
467 if (!NILP(switches))
468 {
469 char *cptr;
470
471 CHECK_STRING (switches);
472 switchstr = XSTRING_DATA(switches);
473 for (cptr = switchstr; *cptr; ++cptr)
474 {
475 switch (*cptr)
476 {
477 case 'A':
478 hide_dot = 0;
479 break;
480 case 'a':
481 hide_system = 0;
482 hide_dot = 0;
483 break;
484 case 'r':
485 reverse = 1;
486 break;
487 case 's':
488 display_size = 1;
489 break;
490 case 'S':
491 sort_by = MSWINDOWS_SORT_BY_SIZE;
492 break;
493 case 't':
494 sort_by = MSWINDOWS_SORT_BY_MOD_DATE;
495 break;
496 }
497 }
498 }
499
500 /*
501 * Sometimes we get ".../foo* /" as FILE (without the space).
502 * While the shell and `ls' don't mind, we certainly do,
503 * because it makes us think there is no wildcard, only a
504 * directory name.
505 */
506 if (!NILP(Fstring_match(build_string("[[?*]"), file, Qnil, Qnil)))
507 {
508 wildcard = Qt;
509 filename = XSTRING_DATA(file);
510 len = strlen(filename);
511 if (len > 0 && (filename[len - 1] == '\\' ||
512 filename[len - 1] == '/'))
513 {
514 filename[len - 1] = '\0';
515 }
516 file = build_string(filename);
517 }
518 if (!NILP(wildcard))
519 {
520 Lisp_Object newfile;
521
522 basename = Ffile_name_nondirectory(file);
523 fns = intern("wildcard-to-regexp");
524 wildpat = call1(fns, basename);
525 newfile = Ffile_name_directory(file);
526 if (NILP(newfile))
527 {
528 /* Ffile_name_directory() can GC */
529 newfile = Ffile_name_directory(Fexpand_file_name(file, Qnil));
530 }
531 file = newfile;
532 }
533 if (!NILP(wildcard) || !NILP(full_directory_p))
534 {
535 CHECK_STRING(file);
536 if (!NILP(wildpat))
537 {
538 CHECK_STRING(wildpat);
539 }
540
541 files = mswindows_get_files(XSTRING_DATA(file), FALSE, wildpat,
542 hide_dot, hide_system, &nfiles);
543 if (files == NULL || nfiles == 0)
544 {
545 break;
546 }
547 }
548 else
549 {
550 files = mswindows_get_files(XSTRING_DATA(file), TRUE, wildpat,
551 hide_dot, hide_system, &nfiles);
552 }
553 if ((sorted_files = xmalloc(nfiles * sizeof(WIN32_FIND_DATA *)))
554 == NULL)
555 {
556 break;
557 }
558 for (i = 0; i < nfiles; ++i)
559 {
560 sorted_files[i] = &files[i];
561 }
562 if (nfiles > 1)
563 {
564 mswindows_sort_files(sorted_files, nfiles, sort_by, reverse);
565 }
566 if (!NILP(wildcard) || !NILP(full_directory_p))
567 {
568 /*
569 * By using doubles, we can handle files up to 2^53 bytes in
570 * size (IEEE doubles have 53 bits of resolution). However,
571 * as we divide by 1024 (or 2^10), the total size is
572 * accurate up to 2^(53+10) --> 2^63 bytes.
573 *
574 * Hopefully, we won't have to handle these file sizes anytime
575 * soon.
576 */
577 double total_size, file_size, block_size;
578
579 if ((block_size = mswindows_ls_round_file_size) <= 0)
580 {
581 block_size = 0;
582 }
583 total_size = 0;
584 for (i = 0; i < nfiles; ++i)
585 {
586 file_size =
587 sorted_files[i]->nFileSizeHigh * (double)UINT_MAX +
588 sorted_files[i]->nFileSizeLow;
589 if (block_size > 0)
590 {
591 /*
592 * Round file_size up to the next nearest block size.
593 */
594 file_size =
595 floor((file_size + block_size - 1) / block_size)
596 * block_size;
597 }
598 /* Here, we round to the nearest 1K */
599 total_size += floor((file_size + 512.) / 1024.);
600 }
601 sprintf(fmtbuf,
602 #if INDENT_LISTING
603 /* ANSI C compilers auto-concatenate adjacent strings */
604 " "
605 #endif
606 "total %.0f\n", total_size);
607 buffer_insert1(current_buffer, build_string(fmtbuf));
608 }
609 for (i = 0; i < nfiles; ++i)
610 {
611 mswindows_format_file(sorted_files[i], fmtbuf, display_size, TRUE);
612 buffer_insert1(current_buffer, build_string(fmtbuf));
613 }
614 break;
615 }
616 if (sorted_files)
617 {
618 xfree(sorted_files);
619 }
620 UNGCPRO;
621 return (result);
622 }
623
624
625
626 /************************************************************************/
627 /* initialization */
628 /************************************************************************/
629
630 void
631 syms_of_dired_mswindows (void)
632 {
633 defsymbol (&Qmswindows_insert_directory, "mswindows-insert-directory");
634
635 DEFSUBR (Fmswindows_insert_directory);
636 }
637
638
639 void
640 vars_of_dired_mswindows (void)
641 {
642 DEFVAR_BOOL ("mswindows-ls-sort-case-insensitive", &mswindows_ls_sort_case_insensitive /*
643 *Non-nil means filenames are sorted in a case-insensitive fashion.
644 Nil means filenames are sorted in a case-sensitive fashion, just like Unix.
645 */ );
646 mswindows_ls_sort_case_insensitive = 1;
647
648 DEFVAR_INT ("mswindows-ls-round-file-size", &mswindows_ls_round_file_size /*
649 *If non-zero, file sizes are rounded in terms of this block size when
650 the file totals are being calculated. This is useful for getting a more
651 accurate estimate of allocated disk space. Note that this only affects
652 the total size calculation; the individual displayed file sizes are not
653 changed. This block size should also be a power of 2 (but this is not
654 enforced), as filesystem block (cluster) sizes are typically powers-of-2.
655 */ );
656 /*
657 * Here, we choose 4096 because it's the cluster size for both FAT32
658 * and NTFS (?). This is probably much too small for people using
659 * plain FAT, but, hopefully, plain FAT will go away someday.
660 *
661 * We should allow something like a alist here, to make the size
662 * dependent on the drive letter, etc..
663 */
664 mswindows_ls_round_file_size = 4096;
665 }