1 /* $FreeBSD: src/sys/msdosfs/msdosfs_conv.c,v 1.29.2.1 2002/11/08 22:01:22 semenu Exp $ */
2 /* $DragonFly: src/sys/vfs/msdosfs/msdosfs_conv.c,v 1.3 2003/08/07 21:17:41 dillon Exp $ */
3 /* $NetBSD: msdosfs_conv.c,v 1.25 1997/11/17 15:36:40 ws Exp $ */
6 * Copyright (C) 1995, 1997 Wolfgang Solfrank.
7 * Copyright (C) 1995, 1997 TooLs GmbH.
9 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by TooLs GmbH.
22 * 4. The name of TooLs GmbH may not be used to endorse or promote products
23 * derived from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
31 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
33 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
34 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 * Written by Paul Popelka (paulp@uts.amdahl.com)
39 * You can do anything you want with this software, just don't say you wrote
40 * it, and don't remove this notice.
42 * This software is provided "as is".
44 * The author supplies this software to be publicly redistributed on the
45 * understanding that the author is not responsible for the correct
46 * functioning of this software in any circumstances and is not liable for
47 * any damages caused by this software.
53 * System include files.
55 #include <sys/param.h>
57 #include <sys/kernel.h> /* defines tz */
58 #include <sys/systm.h>
59 #include <machine/clock.h>
60 #include <sys/dirent.h>
63 * MSDOSFS include files.
68 * Total number of days that have passed for each month in a regular year.
70 static u_short regyear[] = {
71 31, 59, 90, 120, 151, 181,
72 212, 243, 273, 304, 334, 365
76 * Total number of days that have passed for each month in a leap year.
78 static u_short leapyear[] = {
79 31, 60, 91, 121, 152, 182,
80 213, 244, 274, 305, 335, 366
84 * Variables used to remember parts of the last time conversion. Maybe we
85 * can avoid a full conversion.
87 static u_long lasttime;
88 static u_long lastday;
89 static u_short lastddate;
90 static u_short lastdtime;
92 static __inline u_int8_t find_lcode __P((u_int16_t code, u_int16_t *u2w));
95 * Convert the unix version of time to dos's idea of time to be used in
96 * file timestamps. The passed in unix time is assumed to be in GMT.
99 unix2dostime(tsp, ddp, dtp, dhp)
100 struct timespec *tsp;
113 * If the time from the last conversion is the same as now, then
114 * skip the computations and use the saved result.
116 t = tsp->tv_sec - (tz.tz_minuteswest * 60)
117 - (wall_cmos_clock ? adjkerntz : 0);
118 /* - daylight savings time correction */
122 lastdtime = (((t / 2) % 30) << DT_2SECONDS_SHIFT)
123 + (((t / 60) % 60) << DT_MINUTES_SHIFT)
124 + (((t / 3600) % 24) << DT_HOURS_SHIFT);
127 * If the number of days since 1970 is the same as the last
128 * time we did the computation then skip all this leap year
131 days = t / (24 * 60 * 60);
132 if (days != lastday) {
134 for (year = 1970;; year++) {
135 inc = year & 0x03 ? 365 : 366;
140 months = year & 0x03 ? regyear : leapyear;
141 for (month = 0; days >= months[month]; month++)
144 days -= months[month - 1];
145 lastddate = ((days + 1) << DD_DAY_SHIFT)
146 + ((month + 1) << DD_MONTH_SHIFT);
148 * Remember dos's idea of time is relative to 1980.
149 * unix's is relative to 1970. If somehow we get a
150 * time before 1980 then don't give totally crazy
154 lastddate += (year - 1980) << DD_YEAR_SHIFT;
160 *dhp = (tsp->tv_sec & 1) * 100 + tsp->tv_nsec / 10000000;
166 * The number of seconds between Jan 1, 1970 and Jan 1, 1980. In that
167 * interval there were 8 regular years and 2 leap years.
169 #define SECONDSTO1980 (((8 * 365) + (2 * 366)) * (24 * 60 * 60))
171 static u_short lastdosdate;
172 static u_long lastseconds;
175 * Convert from dos' idea of time to unix'. This will probably only be
176 * called from the stat(), and fstat() system calls and so probably need
177 * not be too efficient.
180 dos2unixtime(dd, dt, dh, tsp)
184 struct timespec *tsp;
194 * Uninitialized field, return the epoch.
200 seconds = (((dt & DT_2SECONDS_MASK) >> DT_2SECONDS_SHIFT) << 1)
201 + ((dt & DT_MINUTES_MASK) >> DT_MINUTES_SHIFT) * 60
202 + ((dt & DT_HOURS_MASK) >> DT_HOURS_SHIFT) * 3600
205 * If the year, month, and day from the last conversion are the
206 * same then use the saved value.
208 if (lastdosdate != dd) {
211 year = (dd & DD_YEAR_MASK) >> DD_YEAR_SHIFT;
213 days += year / 4 + 1; /* add in leap days */
214 if ((year & 0x03) == 0)
215 days--; /* if year is a leap year */
216 months = year & 0x03 ? regyear : leapyear;
217 month = (dd & DD_MONTH_MASK) >> DD_MONTH_SHIFT;
218 if (month < 1 || month > 12) {
219 printf("dos2unixtime(): month value out of range (%ld)\n",
224 days += months[month - 2];
225 days += ((dd & DD_DAY_MASK) >> DD_DAY_SHIFT) - 1;
226 lastseconds = (days * 24 * 60 * 60) + SECONDSTO1980;
228 tsp->tv_sec = seconds + lastseconds + (tz.tz_minuteswest * 60)
230 /* + daylight savings time correction */
231 tsp->tv_nsec = (dh % 100) * 10000000;
235 * 0 - character disallowed in long file name.
236 * 1 - character should be replaced by '_' in DOS file name,
237 * and generation number inserted.
238 * 2 - character ('.' and ' ') should be skipped in DOS file name,
239 * and generation number inserted.
243 0, 0, 0, 0, 0, 0, 0, 0, /* 00-07 */
244 0, 0, 0, 0, 0, 0, 0, 0, /* 08-0f */
245 0, 0, 0, 0, 0, 0, 0, 0, /* 10-17 */
246 0, 0, 0, 0, 0, 0, 0, 0, /* 18-1f */
247 2, 0x21, 0, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
248 0x28, 0x29, 0, 1, 1, 0x2d, 2, 0, /* 28-2f */
249 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
250 0x38, 0x39, 0, 1, 0, 1, 0, 0, /* 38-3f */
251 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
252 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
253 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
254 0x58, 0x59, 0x5a, 1, 0, 1, 0x5e, 0x5f, /* 58-5f */
255 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 60-67 */
256 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 68-6f */
257 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 70-77 */
258 0x58, 0x59, 0x5a, 0x7b, 0, 0x7d, 0x7e, 0, /* 78-7f */
259 0, 0, 0, 0, 0, 0, 0, 0, /* 80-87 */
260 0, 0, 0, 0, 0, 0, 0, 0, /* 88-8f */
261 0, 0, 0, 0, 0, 0, 0, 0, /* 90-97 */
262 0, 0, 0, 0, 0, 0, 0, 0, /* 98-9f */
263 0, 0xad, 0xbd, 0x9c, 0xcf, 0xbe, 0xdd, 0xf5, /* a0-a7 */
264 0xf9, 0xb8, 0xa6, 0xae, 0xaa, 0xf0, 0xa9, 0xee, /* a8-af */
265 0xf8, 0xf1, 0xfd, 0xfc, 0xef, 0xe6, 0xf4, 0xfa, /* b0-b7 */
266 0xf7, 0xfb, 0xa7, 0xaf, 0xac, 0xab, 0xf3, 0xa8, /* b8-bf */
267 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* c0-c7 */
268 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* c8-cf */
269 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0x9e, /* d0-d7 */
270 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0xe1, /* d8-df */
271 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* e0-e7 */
272 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* e8-ef */
273 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0xf6, /* f0-f7 */
274 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0x98, /* f8-ff */
279 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 00-07 */
280 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 08-0f */
281 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 10-17 */
282 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 18-1f */
283 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
284 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
285 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
286 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
287 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
288 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
289 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
290 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
291 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
292 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
293 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
294 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
295 0xc7, 0xfc, 0xe9, 0xe2, 0xe4, 0xe0, 0xe5, 0xe7, /* 80-87 */
296 0xea, 0xeb, 0xe8, 0xef, 0xee, 0xec, 0xc4, 0xc5, /* 88-8f */
297 0xc9, 0xe6, 0xc6, 0xf4, 0xf6, 0xf2, 0xfb, 0xf9, /* 90-97 */
298 0xff, 0xd6, 0xdc, 0xf8, 0xa3, 0xd8, 0xd7, 0x3f, /* 98-9f */
299 0xe1, 0xed, 0xf3, 0xfa, 0xf1, 0xd1, 0xaa, 0xba, /* a0-a7 */
300 0xbf, 0xae, 0xac, 0xbd, 0xbc, 0xa1, 0xab, 0xbb, /* a8-af */
301 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xc1, 0xc2, 0xc0, /* b0-b7 */
302 0xa9, 0x3f, 0x3f, 0x3f, 0x3f, 0xa2, 0xa5, 0x3f, /* b8-bf */
303 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xe3, 0xc3, /* c0-c7 */
304 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xa4, /* c8-cf */
305 0xf0, 0xd0, 0xca, 0xcb, 0xc8, 0x3f, 0xcd, 0xce, /* d0-d7 */
306 0xcf, 0x3f, 0x3f, 0x3f, 0x3f, 0xa6, 0xcc, 0x3f, /* d8-df */
307 0xd3, 0xdf, 0xd4, 0xd2, 0xf5, 0xd5, 0xb5, 0xfe, /* e0-e7 */
308 0xde, 0xda, 0xdb, 0xd9, 0xfd, 0xdd, 0xaf, 0x3f, /* e8-ef */
309 0xad, 0xb1, 0x3f, 0xbe, 0xb6, 0xa7, 0xf7, 0xb8, /* f0-f7 */
310 0xb0, 0xa8, 0xb7, 0xb9, 0xb3, 0xb2, 0x3f, 0x3f, /* f8-ff */
315 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
316 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
317 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
318 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
319 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
320 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
321 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
322 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
323 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
324 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
325 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
326 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
327 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
328 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
329 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
330 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
331 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
332 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
333 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
334 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
335 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
336 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
337 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
338 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
339 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
340 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
341 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
342 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
343 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
344 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
345 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
346 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
351 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
352 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
353 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
354 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
355 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
356 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
357 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
358 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
359 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
360 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
361 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
362 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
363 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
364 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
365 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
366 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
367 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
368 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
369 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
370 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
371 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
372 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
373 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
374 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
375 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
376 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
377 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
378 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
379 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
380 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
381 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
382 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
386 * DOS filenames are made of 2 parts, the name part and the extension part.
387 * The name part is 8 characters long and the extension part is 3
388 * characters long. They may contain trailing blanks if the name or
389 * extension are not long enough to fill their respective fields.
393 * Convert a DOS filename to a unix filename. And, return the number of
394 * characters in the resulting unix filename excluding the terminating
398 dos2unixfn(dn, un, lower, d2u_loaded, d2u, ul_loaded, ul)
412 * If first char of the filename is SLOT_E5 (0x05), then the real
413 * first char of the filename should be 0xe5. But, they couldn't
414 * just have a 0xe5 mean 0xe5 because that is used to mean a freed
415 * directory slot. Another dos quirk.
418 c = d2u_loaded ? d2u[0xe5 & 0x7f] : dos2unix[0xe5];
420 c = d2u_loaded && (*dn & 0x80) ? d2u[*dn & 0x7f] :
422 *un++ = (lower & LCASE_BASE) ? (ul_loaded && (c & 0x80) ?
423 ul[c & 0x7f] : u2l[c]) : c;
427 * Copy the name portion into the unix filename string.
429 for (i = 1; i < 8 && *dn != ' '; i++) {
430 c = d2u_loaded && (*dn & 0x80) ? d2u[*dn & 0x7f] :
433 *un++ = (lower & LCASE_BASE) ? (ul_loaded && (c & 0x80) ?
434 ul[c & 0x7f] : u2l[c]) : c;
440 * Now, if there is an extension then put in a period and copy in
446 for (i = 0; i < 3 && *dn != ' '; i++) {
447 c = d2u_loaded && (*dn & 0x80) ? d2u[*dn & 0x7f] :
450 *un++ = (lower & LCASE_EXT) ? (ul_loaded && (c & 0x80) ?
451 ul[c & 0x7f] : u2l[c]) : c;
461 * Convert a unix filename to a DOS filename according to Win95 rules.
462 * If applicable and gen is not 0, it is inserted into the converted
463 * filename as a generation number.
465 * 0 if name couldn't be converted
466 * 1 if the converted name is the same as the original
467 * (no long filename entry necessary for Win95)
468 * 2 if conversion was successful
469 * 3 if conversion was successful and generation number was inserted
472 unix2dosfn(un, dn, unlen, gen, u2d_loaded, u2d, lu_loaded, lu)
484 const u_char *cp, *dp, *dp1;
485 u_char gentext[6], *wcp;
487 #define U2D(c) (u2d_loaded && ((c) & 0x80) ? u2d[(c) & 0x7f] : unix2dos[c])
490 * Fill the dos filename string with blanks. These are DOS's pad
493 for (i = 0; i < 11; i++)
498 * The filenames "." and ".." are handled specially, since they
499 * don't follow dos filename rules.
501 if (un[0] == '.' && unlen == 1) {
505 if (un[0] == '.' && un[1] == '.' && unlen == 2) {
512 * Filenames with only blanks and dots are not allowed!
514 for (cp = un, i = unlen; --i >= 0; cp++)
515 if (*cp != ' ' && *cp != '.')
522 * Filenames with some characters are not allowed!
524 for (cp = un, i = unlen; --i >= 0; cp++)
529 * Now find the extension
530 * Note: dot as first char doesn't start extension
531 * and trailing dots and blanks are ignored
534 for (cp = un + 1, i = unlen - 1; --i >= 0;) {
557 l = unlen - (dp - un);
558 for (i = 0, j = 8; i < l && j < 11; i++, j++) {
560 c = lu_loaded && (c & 0x80) ?
561 lu[c & 0x7f] : l2u[c];
563 if (dp[i] != (dn[j] = c)
579 for (dp = cp; *--dp == ' ' || *dp == '.';);
584 * Now convert the rest of the name
586 for (i = j = 0; un < dp && j < 8; i++, j++, un++) {
587 c = lu_loaded && (*un & 0x80) ?
588 lu[*un & 0x7f] : l2u[*un];
590 if (*un != (dn[j] = c)
605 * If we didn't have any chars in filename,
612 * The first character cannot be E5,
613 * because that means a deleted entry
619 * If there wasn't any char dropped,
620 * there is no place for generation numbers
629 * Now insert the generation number into the filename part
633 for (wcp = gentext + sizeof(gentext); wcp > gentext && gen; gen /= 10)
634 *--wcp = gen % 10 + '0';
637 for (i = 8; dn[--i] == ' ';);
639 if (gentext + sizeof(gentext) - wcp + 1 > 8 - i)
640 i = 8 - (gentext + sizeof(gentext) - wcp + 1);
642 while (wcp < gentext + sizeof(gentext))
649 * Create a Win95 long name directory entry
650 * Note: assumes that the filename is valid,
651 * i.e. doesn't consist solely of blanks and dots
654 unix2winfn(un, unlen, wep, cnt, chksum, table_loaded, u2w)
657 struct winentry *wep;
669 * Drop trailing blanks and dots
671 for (cp = un + unlen; *--cp == ' ' || *cp == '.'; unlen--);
673 un += (cnt - 1) * WIN_CHARS;
674 unlen -= (cnt - 1) * WIN_CHARS;
677 * Initialize winentry to some useful default
679 for (wcp = (u_int8_t *)wep, i = sizeof(*wep); --i >= 0; *wcp++ = 0xff);
681 wep->weAttributes = ATTR_WIN95;
682 wep->weReserved1 = 0;
683 wep->weChksum = chksum;
684 wep->weReserved2 = 0;
687 * Now convert the filename parts
689 for (wcp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
692 if (table_loaded && (*un & 0x80)) {
693 code = u2w[*un++ & 0x7f];
701 for (wcp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
704 if (table_loaded && (*un & 0x80)) {
705 code = u2w[*un++ & 0x7f];
713 for (wcp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
716 if (table_loaded && (*un & 0x80)) {
717 code = u2w[*un++ & 0x7f];
726 wep->weCnt |= WIN_LAST;
732 wep->weCnt |= WIN_LAST;
736 static __inline u_int8_t
737 find_lcode(code, u2w)
743 for (i = 0; i < 128; i++)
750 * Compare our filename to the one in the Win95 entry
751 * Returns the checksum or -1 if no match
754 winChkName(un, unlen, wep, chksum, u2w_loaded, u2w, ul_loaded, ul)
757 struct winentry *wep;
770 * First compare checksums
772 if (wep->weCnt&WIN_LAST)
773 chksum = wep->weChksum;
774 else if (chksum != wep->weChksum)
780 * Offset of this entry
782 i = ((wep->weCnt&WIN_CNT) - 1) * WIN_CHARS;
787 * unlen being zero must not be treated as length missmatch. It is
788 * possible if the entry is WIN_LAST and contains nothing but the
793 if ((wep->weCnt&WIN_LAST) && unlen > WIN_CHARS)
797 * Compare the name parts
799 for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
805 code = (cp[1] << 8) | cp[0];
808 code = find_lcode(code, u2w);
809 else if (code & 0xff00)
812 c1 = ul_loaded && (code & 0x80) ?
813 ul[code & 0x7f] : u2l[code];
814 c2 = ul_loaded && (*un & 0x80) ?
815 ul[*un & 0x7f] : u2l[*un];
821 for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
827 code = (cp[1] << 8) | cp[0];
830 code = find_lcode(code, u2w);
831 else if (code & 0xff00)
834 c1 = ul_loaded && (code & 0x80) ?
835 ul[code & 0x7f] : u2l[code];
836 c2 = ul_loaded && (*un & 0x80) ?
837 ul[*un & 0x7f] : u2l[*un];
843 for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
849 code = (cp[1] << 8) | cp[0];
852 code = find_lcode(code, u2w);
853 else if (code & 0xff00)
856 c1 = ul_loaded && (code & 0x80) ?
857 ul[code & 0x7f] : u2l[code];
858 c2 = ul_loaded && (*un & 0x80) ?
859 ul[*un & 0x7f] : u2l[*un];
869 * Convert Win95 filename to dirbuf.
870 * Returns the checksum or -1 if impossible
873 win2unixfn(wep, dp, chksum, table_loaded, u2w)
874 struct winentry *wep;
881 u_int8_t *np, *ep = dp->d_name + WIN_MAXLEN;
885 if ((wep->weCnt&WIN_CNT) > howmany(WIN_MAXLEN, WIN_CHARS)
886 || !(wep->weCnt&WIN_CNT))
890 * First compare checksums
892 if (wep->weCnt&WIN_LAST) {
893 chksum = wep->weChksum;
895 * This works even though d_namlen is one byte!
897 dp->d_namlen = (wep->weCnt&WIN_CNT) * WIN_CHARS;
898 } else if (chksum != wep->weChksum)
904 * Offset of this entry
906 i = ((wep->weCnt&WIN_CNT) - 1) * WIN_CHARS;
907 np = (u_int8_t *)dp->d_name + i;
910 * Convert the name parts
912 for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
913 code = (cp[1] << 8) | cp[0];
917 dp->d_namlen -= sizeof(wep->wePart2)/2
918 + sizeof(wep->wePart3)/2 + i + 1;
926 code = find_lcode(code, u2w);
927 else if (code & 0xff00)
934 * The size comparison should result in the compiler
935 * optimizing the whole if away
937 if (WIN_MAXLEN % WIN_CHARS < sizeof(wep->wePart1) / 2
944 for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
945 code = (cp[1] << 8) | cp[0];
949 dp->d_namlen -= sizeof(wep->wePart3)/2 + i + 1;
957 code = find_lcode(code, u2w);
958 else if (code & 0xff00)
965 * The size comparisons should be optimized away
967 if (WIN_MAXLEN % WIN_CHARS >= sizeof(wep->wePart1) / 2
968 && WIN_MAXLEN % WIN_CHARS < (sizeof(wep->wePart1) + sizeof(wep->wePart2)) / 2
975 for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
976 code = (cp[1] << 8) | cp[0];
980 dp->d_namlen -= i + 1;
988 code = find_lcode(code, u2w);
989 else if (code & 0xff00)
998 if (WIN_MAXLEN % WIN_CHARS >= (sizeof(wep->wePart1) + sizeof(wep->wePart2)) / 2
1009 * Compute the checksum of a DOS filename for Win95 use
1018 for (s = 0, i = 11; --i >= 0; s += *name++)
1019 s = (s << 7)|(s >> 1);
1024 * Determine the number of slots necessary for Win95 names
1027 winSlotCnt(un, unlen)
1031 unlen = winLenFixup(un, unlen);
1032 if (unlen > WIN_MAXLEN)
1034 return howmany(unlen, WIN_CHARS);
1038 * Determine the number of bytes neccesary for Win95 names
1041 winLenFixup(un, unlen)
1045 for (un += unlen; unlen > 0; unlen--)
1046 if (*--un != ' ' && *un != '.')