1 /* $FreeBSD: src/sys/msdosfs/msdosfs_conv.c,v 1.29.2.1 2002/11/08 22:01:22 semenu Exp $ */
2 /* $NetBSD: msdosfs_conv.c,v 1.25 1997/11/17 15:36:40 ws Exp $ */
5 * Copyright (C) 1995, 1997 Wolfgang Solfrank.
6 * Copyright (C) 1995, 1997 TooLs GmbH.
8 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by TooLs GmbH.
21 * 4. The name of TooLs GmbH may not be used to endorse or promote products
22 * derived from this software without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
29 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
30 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 * Written by Paul Popelka (paulp@uts.amdahl.com)
38 * You can do anything you want with this software, just don't say you wrote
39 * it, and don't remove this notice.
41 * This software is provided "as is".
43 * The author supplies this software to be publicly redistributed on the
44 * understanding that the author is not responsible for the correct
45 * functioning of this software in any circumstances and is not liable for
46 * any damages caused by this software.
52 * System include files.
54 #include <sys/param.h>
56 #include <sys/kernel.h> /* defines tz */
57 #include <sys/systm.h>
58 #include <machine/clock.h>
59 #include <sys/dirent.h>
62 * MSDOSFS include files.
64 #include <msdosfs/direntry.h>
67 * Total number of days that have passed for each month in a regular year.
69 static u_short regyear[] = {
70 31, 59, 90, 120, 151, 181,
71 212, 243, 273, 304, 334, 365
75 * Total number of days that have passed for each month in a leap year.
77 static u_short leapyear[] = {
78 31, 60, 91, 121, 152, 182,
79 213, 244, 274, 305, 335, 366
83 * Variables used to remember parts of the last time conversion. Maybe we
84 * can avoid a full conversion.
86 static u_long lasttime;
87 static u_long lastday;
88 static u_short lastddate;
89 static u_short lastdtime;
91 static __inline u_int8_t find_lcode __P((u_int16_t code, u_int16_t *u2w));
94 * Convert the unix version of time to dos's idea of time to be used in
95 * file timestamps. The passed in unix time is assumed to be in GMT.
98 unix2dostime(tsp, ddp, dtp, dhp)
112 * If the time from the last conversion is the same as now, then
113 * skip the computations and use the saved result.
115 t = tsp->tv_sec - (tz.tz_minuteswest * 60)
116 - (wall_cmos_clock ? adjkerntz : 0);
117 /* - daylight savings time correction */
121 lastdtime = (((t / 2) % 30) << DT_2SECONDS_SHIFT)
122 + (((t / 60) % 60) << DT_MINUTES_SHIFT)
123 + (((t / 3600) % 24) << DT_HOURS_SHIFT);
126 * If the number of days since 1970 is the same as the last
127 * time we did the computation then skip all this leap year
130 days = t / (24 * 60 * 60);
131 if (days != lastday) {
133 for (year = 1970;; year++) {
134 inc = year & 0x03 ? 365 : 366;
139 months = year & 0x03 ? regyear : leapyear;
140 for (month = 0; days >= months[month]; month++)
143 days -= months[month - 1];
144 lastddate = ((days + 1) << DD_DAY_SHIFT)
145 + ((month + 1) << DD_MONTH_SHIFT);
147 * Remember dos's idea of time is relative to 1980.
148 * unix's is relative to 1970. If somehow we get a
149 * time before 1980 then don't give totally crazy
153 lastddate += (year - 1980) << DD_YEAR_SHIFT;
159 *dhp = (tsp->tv_sec & 1) * 100 + tsp->tv_nsec / 10000000;
165 * The number of seconds between Jan 1, 1970 and Jan 1, 1980. In that
166 * interval there were 8 regular years and 2 leap years.
168 #define SECONDSTO1980 (((8 * 365) + (2 * 366)) * (24 * 60 * 60))
170 static u_short lastdosdate;
171 static u_long lastseconds;
174 * Convert from dos' idea of time to unix'. This will probably only be
175 * called from the stat(), and fstat() system calls and so probably need
176 * not be too efficient.
179 dos2unixtime(dd, dt, dh, tsp)
183 struct timespec *tsp;
193 * Uninitialized field, return the epoch.
199 seconds = (((dt & DT_2SECONDS_MASK) >> DT_2SECONDS_SHIFT) << 1)
200 + ((dt & DT_MINUTES_MASK) >> DT_MINUTES_SHIFT) * 60
201 + ((dt & DT_HOURS_MASK) >> DT_HOURS_SHIFT) * 3600
204 * If the year, month, and day from the last conversion are the
205 * same then use the saved value.
207 if (lastdosdate != dd) {
210 year = (dd & DD_YEAR_MASK) >> DD_YEAR_SHIFT;
212 days += year / 4 + 1; /* add in leap days */
213 if ((year & 0x03) == 0)
214 days--; /* if year is a leap year */
215 months = year & 0x03 ? regyear : leapyear;
216 month = (dd & DD_MONTH_MASK) >> DD_MONTH_SHIFT;
217 if (month < 1 || month > 12) {
218 printf("dos2unixtime(): month value out of range (%ld)\n",
223 days += months[month - 2];
224 days += ((dd & DD_DAY_MASK) >> DD_DAY_SHIFT) - 1;
225 lastseconds = (days * 24 * 60 * 60) + SECONDSTO1980;
227 tsp->tv_sec = seconds + lastseconds + (tz.tz_minuteswest * 60)
229 /* + daylight savings time correction */
230 tsp->tv_nsec = (dh % 100) * 10000000;
234 * 0 - character disallowed in long file name.
235 * 1 - character should be replaced by '_' in DOS file name,
236 * and generation number inserted.
237 * 2 - character ('.' and ' ') should be skipped in DOS file name,
238 * and generation number inserted.
242 0, 0, 0, 0, 0, 0, 0, 0, /* 00-07 */
243 0, 0, 0, 0, 0, 0, 0, 0, /* 08-0f */
244 0, 0, 0, 0, 0, 0, 0, 0, /* 10-17 */
245 0, 0, 0, 0, 0, 0, 0, 0, /* 18-1f */
246 2, 0x21, 0, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
247 0x28, 0x29, 0, 1, 1, 0x2d, 2, 0, /* 28-2f */
248 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
249 0x38, 0x39, 0, 1, 0, 1, 0, 0, /* 38-3f */
250 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
251 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
252 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
253 0x58, 0x59, 0x5a, 1, 0, 1, 0x5e, 0x5f, /* 58-5f */
254 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 60-67 */
255 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 68-6f */
256 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 70-77 */
257 0x58, 0x59, 0x5a, 0x7b, 0, 0x7d, 0x7e, 0, /* 78-7f */
258 0, 0, 0, 0, 0, 0, 0, 0, /* 80-87 */
259 0, 0, 0, 0, 0, 0, 0, 0, /* 88-8f */
260 0, 0, 0, 0, 0, 0, 0, 0, /* 90-97 */
261 0, 0, 0, 0, 0, 0, 0, 0, /* 98-9f */
262 0, 0xad, 0xbd, 0x9c, 0xcf, 0xbe, 0xdd, 0xf5, /* a0-a7 */
263 0xf9, 0xb8, 0xa6, 0xae, 0xaa, 0xf0, 0xa9, 0xee, /* a8-af */
264 0xf8, 0xf1, 0xfd, 0xfc, 0xef, 0xe6, 0xf4, 0xfa, /* b0-b7 */
265 0xf7, 0xfb, 0xa7, 0xaf, 0xac, 0xab, 0xf3, 0xa8, /* b8-bf */
266 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* c0-c7 */
267 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* c8-cf */
268 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0x9e, /* d0-d7 */
269 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0xe1, /* d8-df */
270 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* e0-e7 */
271 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* e8-ef */
272 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0xf6, /* f0-f7 */
273 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0x98, /* f8-ff */
278 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 00-07 */
279 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 08-0f */
280 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 10-17 */
281 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 18-1f */
282 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
283 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
284 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
285 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
286 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
287 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
288 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
289 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
290 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
291 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
292 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
293 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
294 0xc7, 0xfc, 0xe9, 0xe2, 0xe4, 0xe0, 0xe5, 0xe7, /* 80-87 */
295 0xea, 0xeb, 0xe8, 0xef, 0xee, 0xec, 0xc4, 0xc5, /* 88-8f */
296 0xc9, 0xe6, 0xc6, 0xf4, 0xf6, 0xf2, 0xfb, 0xf9, /* 90-97 */
297 0xff, 0xd6, 0xdc, 0xf8, 0xa3, 0xd8, 0xd7, 0x3f, /* 98-9f */
298 0xe1, 0xed, 0xf3, 0xfa, 0xf1, 0xd1, 0xaa, 0xba, /* a0-a7 */
299 0xbf, 0xae, 0xac, 0xbd, 0xbc, 0xa1, 0xab, 0xbb, /* a8-af */
300 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xc1, 0xc2, 0xc0, /* b0-b7 */
301 0xa9, 0x3f, 0x3f, 0x3f, 0x3f, 0xa2, 0xa5, 0x3f, /* b8-bf */
302 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xe3, 0xc3, /* c0-c7 */
303 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xa4, /* c8-cf */
304 0xf0, 0xd0, 0xca, 0xcb, 0xc8, 0x3f, 0xcd, 0xce, /* d0-d7 */
305 0xcf, 0x3f, 0x3f, 0x3f, 0x3f, 0xa6, 0xcc, 0x3f, /* d8-df */
306 0xd3, 0xdf, 0xd4, 0xd2, 0xf5, 0xd5, 0xb5, 0xfe, /* e0-e7 */
307 0xde, 0xda, 0xdb, 0xd9, 0xfd, 0xdd, 0xaf, 0x3f, /* e8-ef */
308 0xad, 0xb1, 0x3f, 0xbe, 0xb6, 0xa7, 0xf7, 0xb8, /* f0-f7 */
309 0xb0, 0xa8, 0xb7, 0xb9, 0xb3, 0xb2, 0x3f, 0x3f, /* f8-ff */
314 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
315 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
316 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
317 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
318 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
319 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
320 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
321 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
322 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
323 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
324 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
325 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
326 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
327 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
328 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
329 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
330 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
331 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
332 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
333 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
334 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
335 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
336 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
337 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
338 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
339 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
340 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
341 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
342 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
343 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
344 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
345 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
350 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
351 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
352 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
353 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
354 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
355 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
356 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
357 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
358 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
359 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
360 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
361 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
362 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
363 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
364 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
365 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
366 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
367 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
368 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
369 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
370 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
371 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
372 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
373 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
374 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
375 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
376 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
377 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
378 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
379 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
380 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
381 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
385 * DOS filenames are made of 2 parts, the name part and the extension part.
386 * The name part is 8 characters long and the extension part is 3
387 * characters long. They may contain trailing blanks if the name or
388 * extension are not long enough to fill their respective fields.
392 * Convert a DOS filename to a unix filename. And, return the number of
393 * characters in the resulting unix filename excluding the terminating
397 dos2unixfn(dn, un, lower, d2u_loaded, d2u, ul_loaded, ul)
411 * If first char of the filename is SLOT_E5 (0x05), then the real
412 * first char of the filename should be 0xe5. But, they couldn't
413 * just have a 0xe5 mean 0xe5 because that is used to mean a freed
414 * directory slot. Another dos quirk.
417 c = d2u_loaded ? d2u[0xe5 & 0x7f] : dos2unix[0xe5];
419 c = d2u_loaded && (*dn & 0x80) ? d2u[*dn & 0x7f] :
421 *un++ = (lower & LCASE_BASE) ? (ul_loaded && (c & 0x80) ?
422 ul[c & 0x7f] : u2l[c]) : c;
426 * Copy the name portion into the unix filename string.
428 for (i = 1; i < 8 && *dn != ' '; i++) {
429 c = d2u_loaded && (*dn & 0x80) ? d2u[*dn & 0x7f] :
432 *un++ = (lower & LCASE_BASE) ? (ul_loaded && (c & 0x80) ?
433 ul[c & 0x7f] : u2l[c]) : c;
439 * Now, if there is an extension then put in a period and copy in
445 for (i = 0; i < 3 && *dn != ' '; i++) {
446 c = d2u_loaded && (*dn & 0x80) ? d2u[*dn & 0x7f] :
449 *un++ = (lower & LCASE_EXT) ? (ul_loaded && (c & 0x80) ?
450 ul[c & 0x7f] : u2l[c]) : c;
460 * Convert a unix filename to a DOS filename according to Win95 rules.
461 * If applicable and gen is not 0, it is inserted into the converted
462 * filename as a generation number.
464 * 0 if name couldn't be converted
465 * 1 if the converted name is the same as the original
466 * (no long filename entry necessary for Win95)
467 * 2 if conversion was successful
468 * 3 if conversion was successful and generation number was inserted
471 unix2dosfn(un, dn, unlen, gen, u2d_loaded, u2d, lu_loaded, lu)
483 const u_char *cp, *dp, *dp1;
484 u_char gentext[6], *wcp;
486 #define U2D(c) (u2d_loaded && ((c) & 0x80) ? u2d[(c) & 0x7f] : unix2dos[c])
489 * Fill the dos filename string with blanks. These are DOS's pad
492 for (i = 0; i < 11; i++)
497 * The filenames "." and ".." are handled specially, since they
498 * don't follow dos filename rules.
500 if (un[0] == '.' && unlen == 1) {
504 if (un[0] == '.' && un[1] == '.' && unlen == 2) {
511 * Filenames with only blanks and dots are not allowed!
513 for (cp = un, i = unlen; --i >= 0; cp++)
514 if (*cp != ' ' && *cp != '.')
521 * Filenames with some characters are not allowed!
523 for (cp = un, i = unlen; --i >= 0; cp++)
528 * Now find the extension
529 * Note: dot as first char doesn't start extension
530 * and trailing dots and blanks are ignored
533 for (cp = un + 1, i = unlen - 1; --i >= 0;) {
556 l = unlen - (dp - un);
557 for (i = 0, j = 8; i < l && j < 11; i++, j++) {
559 c = lu_loaded && (c & 0x80) ?
560 lu[c & 0x7f] : l2u[c];
562 if (dp[i] != (dn[j] = c)
578 for (dp = cp; *--dp == ' ' || *dp == '.';);
583 * Now convert the rest of the name
585 for (i = j = 0; un < dp && j < 8; i++, j++, un++) {
586 c = lu_loaded && (*un & 0x80) ?
587 lu[*un & 0x7f] : l2u[*un];
589 if (*un != (dn[j] = c)
604 * If we didn't have any chars in filename,
611 * The first character cannot be E5,
612 * because that means a deleted entry
618 * If there wasn't any char dropped,
619 * there is no place for generation numbers
628 * Now insert the generation number into the filename part
632 for (wcp = gentext + sizeof(gentext); wcp > gentext && gen; gen /= 10)
633 *--wcp = gen % 10 + '0';
636 for (i = 8; dn[--i] == ' ';);
638 if (gentext + sizeof(gentext) - wcp + 1 > 8 - i)
639 i = 8 - (gentext + sizeof(gentext) - wcp + 1);
641 while (wcp < gentext + sizeof(gentext))
648 * Create a Win95 long name directory entry
649 * Note: assumes that the filename is valid,
650 * i.e. doesn't consist solely of blanks and dots
653 unix2winfn(un, unlen, wep, cnt, chksum, table_loaded, u2w)
656 struct winentry *wep;
668 * Drop trailing blanks and dots
670 for (cp = un + unlen; *--cp == ' ' || *cp == '.'; unlen--);
672 un += (cnt - 1) * WIN_CHARS;
673 unlen -= (cnt - 1) * WIN_CHARS;
676 * Initialize winentry to some useful default
678 for (wcp = (u_int8_t *)wep, i = sizeof(*wep); --i >= 0; *wcp++ = 0xff);
680 wep->weAttributes = ATTR_WIN95;
681 wep->weReserved1 = 0;
682 wep->weChksum = chksum;
683 wep->weReserved2 = 0;
686 * Now convert the filename parts
688 for (wcp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
691 if (table_loaded && (*un & 0x80)) {
692 code = u2w[*un++ & 0x7f];
700 for (wcp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
703 if (table_loaded && (*un & 0x80)) {
704 code = u2w[*un++ & 0x7f];
712 for (wcp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
715 if (table_loaded && (*un & 0x80)) {
716 code = u2w[*un++ & 0x7f];
725 wep->weCnt |= WIN_LAST;
731 wep->weCnt |= WIN_LAST;
735 static __inline u_int8_t
736 find_lcode(code, u2w)
742 for (i = 0; i < 128; i++)
749 * Compare our filename to the one in the Win95 entry
750 * Returns the checksum or -1 if no match
753 winChkName(un, unlen, wep, chksum, u2w_loaded, u2w, ul_loaded, ul)
756 struct winentry *wep;
769 * First compare checksums
771 if (wep->weCnt&WIN_LAST)
772 chksum = wep->weChksum;
773 else if (chksum != wep->weChksum)
779 * Offset of this entry
781 i = ((wep->weCnt&WIN_CNT) - 1) * WIN_CHARS;
786 * unlen being zero must not be treated as length missmatch. It is
787 * possible if the entry is WIN_LAST and contains nothing but the
792 if ((wep->weCnt&WIN_LAST) && unlen > WIN_CHARS)
796 * Compare the name parts
798 for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
804 code = (cp[1] << 8) | cp[0];
807 code = find_lcode(code, u2w);
808 else if (code & 0xff00)
811 c1 = ul_loaded && (code & 0x80) ?
812 ul[code & 0x7f] : u2l[code];
813 c2 = ul_loaded && (*un & 0x80) ?
814 ul[*un & 0x7f] : u2l[*un];
820 for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
826 code = (cp[1] << 8) | cp[0];
829 code = find_lcode(code, u2w);
830 else if (code & 0xff00)
833 c1 = ul_loaded && (code & 0x80) ?
834 ul[code & 0x7f] : u2l[code];
835 c2 = ul_loaded && (*un & 0x80) ?
836 ul[*un & 0x7f] : u2l[*un];
842 for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
848 code = (cp[1] << 8) | cp[0];
851 code = find_lcode(code, u2w);
852 else if (code & 0xff00)
855 c1 = ul_loaded && (code & 0x80) ?
856 ul[code & 0x7f] : u2l[code];
857 c2 = ul_loaded && (*un & 0x80) ?
858 ul[*un & 0x7f] : u2l[*un];
868 * Convert Win95 filename to dirbuf.
869 * Returns the checksum or -1 if impossible
872 win2unixfn(wep, dp, chksum, table_loaded, u2w)
873 struct winentry *wep;
880 u_int8_t *np, *ep = dp->d_name + WIN_MAXLEN;
884 if ((wep->weCnt&WIN_CNT) > howmany(WIN_MAXLEN, WIN_CHARS)
885 || !(wep->weCnt&WIN_CNT))
889 * First compare checksums
891 if (wep->weCnt&WIN_LAST) {
892 chksum = wep->weChksum;
894 * This works even though d_namlen is one byte!
896 dp->d_namlen = (wep->weCnt&WIN_CNT) * WIN_CHARS;
897 } else if (chksum != wep->weChksum)
903 * Offset of this entry
905 i = ((wep->weCnt&WIN_CNT) - 1) * WIN_CHARS;
906 np = (u_int8_t *)dp->d_name + i;
909 * Convert the name parts
911 for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
912 code = (cp[1] << 8) | cp[0];
916 dp->d_namlen -= sizeof(wep->wePart2)/2
917 + sizeof(wep->wePart3)/2 + i + 1;
925 code = find_lcode(code, u2w);
926 else if (code & 0xff00)
933 * The size comparison should result in the compiler
934 * optimizing the whole if away
936 if (WIN_MAXLEN % WIN_CHARS < sizeof(wep->wePart1) / 2
943 for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
944 code = (cp[1] << 8) | cp[0];
948 dp->d_namlen -= sizeof(wep->wePart3)/2 + i + 1;
956 code = find_lcode(code, u2w);
957 else if (code & 0xff00)
964 * The size comparisons should be optimized away
966 if (WIN_MAXLEN % WIN_CHARS >= sizeof(wep->wePart1) / 2
967 && WIN_MAXLEN % WIN_CHARS < (sizeof(wep->wePart1) + sizeof(wep->wePart2)) / 2
974 for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
975 code = (cp[1] << 8) | cp[0];
979 dp->d_namlen -= i + 1;
987 code = find_lcode(code, u2w);
988 else if (code & 0xff00)
997 if (WIN_MAXLEN % WIN_CHARS >= (sizeof(wep->wePart1) + sizeof(wep->wePart2)) / 2
1008 * Compute the checksum of a DOS filename for Win95 use
1017 for (s = 0, i = 11; --i >= 0; s += *name++)
1018 s = (s << 7)|(s >> 1);
1023 * Determine the number of slots necessary for Win95 names
1026 winSlotCnt(un, unlen)
1030 unlen = winLenFixup(un, unlen);
1031 if (unlen > WIN_MAXLEN)
1033 return howmany(unlen, WIN_CHARS);
1037 * Determine the number of bytes neccesary for Win95 names
1040 winLenFixup(un, unlen)
1044 for (un += unlen; unlen > 0; unlen--)
1045 if (*--un != ' ' && *un != '.')