1042 lines
28 KiB
C
1042 lines
28 KiB
C
/* $Id: msdosfs_conv.c,v 1.26 1998/04/15 17:46:37 bde Exp $ */
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/* $NetBSD: msdosfs_conv.c,v 1.25 1997/11/17 15:36:40 ws Exp $ */
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/*-
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* Copyright (C) 1995, 1997 Wolfgang Solfrank.
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* Copyright (C) 1995, 1997 TooLs GmbH.
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* All rights reserved.
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* Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Written by Paul Popelka (paulp@uts.amdahl.com)
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*
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* You can do anything you want with this software, just don't say you wrote
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* it, and don't remove this notice.
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*
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* This software is provided "as is".
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*
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* The author supplies this software to be publicly redistributed on the
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* understanding that the author is not responsible for the correct
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* functioning of this software in any circumstances and is not liable for
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* any damages caused by this software.
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*
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* October 1992
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*/
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/*
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* System include files.
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*/
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/kernel.h> /* defines tz */
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#include <sys/systm.h>
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#include <machine/clock.h>
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#include <sys/dirent.h>
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/*
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* MSDOSFS include files.
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*/
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#include <msdosfs/direntry.h>
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/*
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* Total number of days that have passed for each month in a regular year.
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*/
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static u_short regyear[] = {
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31, 59, 90, 120, 151, 181,
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212, 243, 273, 304, 334, 365
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};
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/*
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* Total number of days that have passed for each month in a leap year.
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*/
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static u_short leapyear[] = {
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31, 60, 91, 121, 152, 182,
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213, 244, 274, 305, 335, 366
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};
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/*
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* Variables used to remember parts of the last time conversion. Maybe we
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* can avoid a full conversion.
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*/
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static u_long lasttime;
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static u_long lastday;
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static u_short lastddate;
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static u_short lastdtime;
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static __inline u_int8_t find_lcode __P((u_int16_t code, u_int16_t *u2w));
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/*
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* Convert the unix version of time to dos's idea of time to be used in
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* file timestamps. The passed in unix time is assumed to be in GMT.
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*/
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void
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unix2dostime(tsp, ddp, dtp, dhp)
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struct timespec *tsp;
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u_int16_t *ddp;
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u_int16_t *dtp;
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u_int8_t *dhp;
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{
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u_long t;
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u_long days;
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u_long inc;
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u_long year;
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u_long month;
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u_short *months;
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/*
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* If the time from the last conversion is the same as now, then
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* skip the computations and use the saved result.
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*/
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t = tsp->tv_sec - (tz.tz_minuteswest * 60)
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- (wall_cmos_clock ? adjkerntz : 0);
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/* - daylight savings time correction */
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t &= ~1;
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if (lasttime != t) {
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lasttime = t;
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lastdtime = (((t / 2) % 30) << DT_2SECONDS_SHIFT)
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+ (((t / 60) % 60) << DT_MINUTES_SHIFT)
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+ (((t / 3600) % 24) << DT_HOURS_SHIFT);
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/*
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* If the number of days since 1970 is the same as the last
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* time we did the computation then skip all this leap year
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* and month stuff.
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*/
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days = t / (24 * 60 * 60);
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if (days != lastday) {
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lastday = days;
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for (year = 1970;; year++) {
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inc = year & 0x03 ? 365 : 366;
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if (days < inc)
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break;
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days -= inc;
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}
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months = year & 0x03 ? regyear : leapyear;
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for (month = 0; days >= months[month]; month++)
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;
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if (month > 0)
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days -= months[month - 1];
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lastddate = ((days + 1) << DD_DAY_SHIFT)
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+ ((month + 1) << DD_MONTH_SHIFT);
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/*
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* Remember dos's idea of time is relative to 1980.
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* unix's is relative to 1970. If somehow we get a
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* time before 1980 then don't give totally crazy
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* results.
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*/
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if (year > 1980)
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lastddate += (year - 1980) << DD_YEAR_SHIFT;
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}
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}
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if (dtp)
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*dtp = lastdtime;
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if (dhp)
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*dhp = (tsp->tv_sec & 1) * 100 + tsp->tv_nsec / 10000000;
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*ddp = lastddate;
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}
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/*
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* The number of seconds between Jan 1, 1970 and Jan 1, 1980. In that
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* interval there were 8 regular years and 2 leap years.
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*/
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#define SECONDSTO1980 (((8 * 365) + (2 * 366)) * (24 * 60 * 60))
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static u_short lastdosdate;
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static u_long lastseconds;
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/*
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* Convert from dos' idea of time to unix'. This will probably only be
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* called from the stat(), and fstat() system calls and so probably need
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* not be too efficient.
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*/
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void
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dos2unixtime(dd, dt, dh, tsp)
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u_int dd;
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u_int dt;
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u_int dh;
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struct timespec *tsp;
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{
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u_long seconds;
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u_long month;
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u_long year;
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u_long days;
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u_short *months;
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if (dd == 0) {
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/*
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* Uninitialized field, return the epoch.
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*/
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tsp->tv_sec = 0;
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tsp->tv_nsec = 0;
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return;
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}
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seconds = (((dt & DT_2SECONDS_MASK) >> DT_2SECONDS_SHIFT) << 1)
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+ ((dt & DT_MINUTES_MASK) >> DT_MINUTES_SHIFT) * 60
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+ ((dt & DT_HOURS_MASK) >> DT_HOURS_SHIFT) * 3600
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+ dh / 100;
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/*
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* If the year, month, and day from the last conversion are the
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* same then use the saved value.
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*/
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if (lastdosdate != dd) {
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lastdosdate = dd;
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days = 0;
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year = (dd & DD_YEAR_MASK) >> DD_YEAR_SHIFT;
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days = year * 365;
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days += year / 4 + 1; /* add in leap days */
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if ((year & 0x03) == 0)
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days--; /* if year is a leap year */
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months = year & 0x03 ? regyear : leapyear;
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month = (dd & DD_MONTH_MASK) >> DD_MONTH_SHIFT;
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if (month < 1 || month > 12) {
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printf("dos2unixtime(): month value out of range (%ld)\n",
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month);
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month = 1;
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}
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if (month > 1)
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days += months[month - 2];
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days += ((dd & DD_DAY_MASK) >> DD_DAY_SHIFT) - 1;
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lastseconds = (days * 24 * 60 * 60) + SECONDSTO1980;
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}
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tsp->tv_sec = seconds + lastseconds + (tz.tz_minuteswest * 60)
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+ adjkerntz;
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/* + daylight savings time correction */
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tsp->tv_nsec = (dh % 100) * 10000000;
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}
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/*
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* 0 - character disallowed in long file name.
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* 1 - character should be replaced by '_' in DOS file name,
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* and generation number inserted.
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* 2 - character ('.' and ' ') should be skipped in DOS file name,
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* and generation number inserted.
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*/
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static u_char
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unix2dos[256] = {
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0, 0, 0, 0, 0, 0, 0, 0, /* 00-07 */
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0, 0, 0, 0, 0, 0, 0, 0, /* 08-0f */
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0, 0, 0, 0, 0, 0, 0, 0, /* 10-17 */
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0, 0, 0, 0, 0, 0, 0, 0, /* 18-1f */
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2, 0x21, 0, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
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0x28, 0x29, 0, 1, 1, 0x2d, 2, 0, /* 28-2f */
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
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0x38, 0x39, 0, 1, 0, 1, 0, 0, /* 38-3f */
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0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
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0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
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0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
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0x58, 0x59, 0x5a, 1, 0, 1, 0x5e, 0x5f, /* 58-5f */
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0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 60-67 */
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0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 68-6f */
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0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 70-77 */
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0x58, 0x59, 0x5a, 0x7b, 0, 0x7d, 0x7e, 0, /* 78-7f */
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0, 0, 0, 0, 0, 0, 0, 0, /* 80-87 */
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0, 0, 0, 0, 0, 0, 0, 0, /* 88-8f */
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0, 0, 0, 0, 0, 0, 0, 0, /* 90-97 */
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0, 0, 0, 0, 0, 0, 0, 0, /* 98-9f */
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0, 0xad, 0xbd, 0x9c, 0xcf, 0xbe, 0xdd, 0xf5, /* a0-a7 */
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0xf9, 0xb8, 0xa6, 0xae, 0xaa, 0xf0, 0xa9, 0xee, /* a8-af */
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0xf8, 0xf1, 0xfd, 0xfc, 0xef, 0xe6, 0xf4, 0xfa, /* b0-b7 */
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0xf7, 0xfb, 0xa7, 0xaf, 0xac, 0xab, 0xf3, 0xa8, /* b8-bf */
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0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* c0-c7 */
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0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* c8-cf */
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0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0x9e, /* d0-d7 */
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0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0xe1, /* d8-df */
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0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* e0-e7 */
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0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* e8-ef */
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0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0xf6, /* f0-f7 */
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0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0x98, /* f8-ff */
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};
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static u_char
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dos2unix[256] = {
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0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 00-07 */
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0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 08-0f */
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0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 10-17 */
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0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 18-1f */
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
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0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
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0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
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0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
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0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
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0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
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0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
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0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
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0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
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0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
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0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
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0xc7, 0xfc, 0xe9, 0xe2, 0xe4, 0xe0, 0xe5, 0xe7, /* 80-87 */
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0xea, 0xeb, 0xe8, 0xef, 0xee, 0xec, 0xc4, 0xc5, /* 88-8f */
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0xc9, 0xe6, 0xc6, 0xf4, 0xf6, 0xf2, 0xfb, 0xf9, /* 90-97 */
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0xff, 0xd6, 0xdc, 0xf8, 0xa3, 0xd8, 0xd7, 0x3f, /* 98-9f */
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0xe1, 0xed, 0xf3, 0xfa, 0xf1, 0xd1, 0xaa, 0xba, /* a0-a7 */
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0xbf, 0xae, 0xac, 0xbd, 0xbc, 0xa1, 0xab, 0xbb, /* a8-af */
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0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xc1, 0xc2, 0xc0, /* b0-b7 */
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0xa9, 0x3f, 0x3f, 0x3f, 0x3f, 0xa2, 0xa5, 0x3f, /* b8-bf */
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0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xe3, 0xc3, /* c0-c7 */
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0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xa4, /* c8-cf */
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0xf0, 0xd0, 0xca, 0xcb, 0xc8, 0x3f, 0xcd, 0xce, /* d0-d7 */
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0xcf, 0x3f, 0x3f, 0x3f, 0x3f, 0xa6, 0xcc, 0x3f, /* d8-df */
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0xd3, 0xdf, 0xd4, 0xd2, 0xf5, 0xd5, 0xb5, 0xfe, /* e0-e7 */
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0xde, 0xda, 0xdb, 0xd9, 0xfd, 0xdd, 0xaf, 0x3f, /* e8-ef */
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0xad, 0xb1, 0x3f, 0xbe, 0xb6, 0xa7, 0xf7, 0xb8, /* f0-f7 */
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0xb0, 0xa8, 0xb7, 0xb9, 0xb3, 0xb2, 0x3f, 0x3f, /* f8-ff */
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};
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static u_char
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u2l[256] = {
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
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0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
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0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
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0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
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0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
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0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
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0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
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0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
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0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
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0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
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0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
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0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
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0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
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0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
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0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
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0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
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0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
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0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
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0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
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0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
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0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
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0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
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0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
|
|
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
|
|
0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
|
|
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
|
|
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
|
|
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
|
|
0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
|
|
};
|
|
|
|
static u_char
|
|
l2u[256] = {
|
|
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
|
|
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
|
|
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
|
|
0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
|
|
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
|
|
0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
|
|
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
|
|
0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
|
|
0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
|
|
0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
|
|
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
|
|
0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
|
|
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
|
|
0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
|
|
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
|
|
0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
|
|
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
|
|
0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
|
|
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
|
|
0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
|
|
0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
|
|
0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
|
|
0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
|
|
0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
|
|
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
|
|
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
|
|
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
|
|
0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
|
|
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
|
|
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
|
|
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
|
|
0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
|
|
};
|
|
|
|
/*
|
|
* DOS filenames are made of 2 parts, the name part and the extension part.
|
|
* The name part is 8 characters long and the extension part is 3
|
|
* characters long. They may contain trailing blanks if the name or
|
|
* extension are not long enough to fill their respective fields.
|
|
*/
|
|
|
|
/*
|
|
* Convert a DOS filename to a unix filename. And, return the number of
|
|
* characters in the resulting unix filename excluding the terminating
|
|
* null.
|
|
*/
|
|
int
|
|
dos2unixfn(dn, un, lower, d2u_loaded, d2u, ul_loaded, ul)
|
|
u_char dn[11];
|
|
u_char *un;
|
|
int lower;
|
|
int d2u_loaded;
|
|
u_int8_t *d2u;
|
|
int ul_loaded;
|
|
u_int8_t *ul;
|
|
{
|
|
int i;
|
|
int thislong = 1;
|
|
u_char c;
|
|
|
|
/*
|
|
* If first char of the filename is SLOT_E5 (0x05), then the real
|
|
* first char of the filename should be 0xe5. But, they couldn't
|
|
* just have a 0xe5 mean 0xe5 because that is used to mean a freed
|
|
* directory slot. Another dos quirk.
|
|
*/
|
|
if (*dn == SLOT_E5)
|
|
c = d2u_loaded ? d2u[0xe5 & 0x7f] : dos2unix[0xe5];
|
|
else
|
|
c = d2u_loaded && (*dn & 0x80) ? d2u[*dn & 0x7f] :
|
|
dos2unix[*dn];
|
|
*un++ = lower ? (ul_loaded && (c & 0x80) ?
|
|
ul[c & 0x7f] : u2l[c]) : c;
|
|
dn++;
|
|
|
|
/*
|
|
* Copy the name portion into the unix filename string.
|
|
*/
|
|
for (i = 1; i < 8 && *dn != ' '; i++) {
|
|
c = d2u_loaded && (*dn & 0x80) ? d2u[*dn & 0x7f] :
|
|
dos2unix[*dn];
|
|
dn++;
|
|
*un++ = lower ? (ul_loaded && (c & 0x80) ?
|
|
ul[c & 0x7f] : u2l[c]) : c;
|
|
thislong++;
|
|
}
|
|
dn += 8 - i;
|
|
|
|
/*
|
|
* Now, if there is an extension then put in a period and copy in
|
|
* the extension.
|
|
*/
|
|
if (*dn != ' ') {
|
|
*un++ = '.';
|
|
thislong++;
|
|
for (i = 0; i < 3 && *dn != ' '; i++) {
|
|
c = d2u_loaded && (*dn & 0x80) ? d2u[*dn & 0x7f] :
|
|
dos2unix[*dn];
|
|
dn++;
|
|
*un++ = lower ? (ul_loaded && (c & 0x80) ?
|
|
ul[c & 0x7f] : u2l[c]) : c;
|
|
thislong++;
|
|
}
|
|
}
|
|
*un++ = 0;
|
|
|
|
return (thislong);
|
|
}
|
|
|
|
/*
|
|
* Convert a unix filename to a DOS filename according to Win95 rules.
|
|
* If applicable and gen is not 0, it is inserted into the converted
|
|
* filename as a generation number.
|
|
* Returns
|
|
* 0 if name couldn't be converted
|
|
* 1 if the converted name is the same as the original
|
|
* (no long filename entry necessary for Win95)
|
|
* 2 if conversion was successful
|
|
* 3 if conversion was successful and generation number was inserted
|
|
*/
|
|
int
|
|
unix2dosfn(un, dn, unlen, gen, u2d_loaded, u2d, lu_loaded, lu)
|
|
const u_char *un;
|
|
u_char dn[12];
|
|
int unlen;
|
|
u_int gen;
|
|
int u2d_loaded;
|
|
u_int8_t *u2d;
|
|
int lu_loaded;
|
|
u_int8_t *lu;
|
|
{
|
|
int i, j, l;
|
|
int conv = 1;
|
|
const u_char *cp, *dp, *dp1;
|
|
u_char gentext[6], *wcp;
|
|
u_int8_t c;
|
|
#define U2D(c) (u2d_loaded && ((c) & 0x80) ? u2d[(c) & 0x7f] : unix2dos[c])
|
|
|
|
/*
|
|
* Fill the dos filename string with blanks. These are DOS's pad
|
|
* characters.
|
|
*/
|
|
for (i = 0; i < 11; i++)
|
|
dn[i] = ' ';
|
|
dn[11] = 0;
|
|
|
|
/*
|
|
* The filenames "." and ".." are handled specially, since they
|
|
* don't follow dos filename rules.
|
|
*/
|
|
if (un[0] == '.' && unlen == 1) {
|
|
dn[0] = '.';
|
|
return gen <= 1;
|
|
}
|
|
if (un[0] == '.' && un[1] == '.' && unlen == 2) {
|
|
dn[0] = '.';
|
|
dn[1] = '.';
|
|
return gen <= 1;
|
|
}
|
|
|
|
/*
|
|
* Filenames with only blanks and dots are not allowed!
|
|
*/
|
|
for (cp = un, i = unlen; --i >= 0; cp++)
|
|
if (*cp != ' ' && *cp != '.')
|
|
break;
|
|
if (i < 0)
|
|
return 0;
|
|
|
|
|
|
/*
|
|
* Filenames with some characters are not allowed!
|
|
*/
|
|
for (cp = un, i = unlen; --i >= 0; cp++)
|
|
if (U2D(*cp) == 0)
|
|
return 0;
|
|
|
|
/*
|
|
* Now find the extension
|
|
* Note: dot as first char doesn't start extension
|
|
* and trailing dots and blanks are ignored
|
|
*/
|
|
dp = dp1 = 0;
|
|
for (cp = un + 1, i = unlen - 1; --i >= 0;) {
|
|
switch (*cp++) {
|
|
case '.':
|
|
if (!dp1)
|
|
dp1 = cp;
|
|
break;
|
|
case ' ':
|
|
break;
|
|
default:
|
|
if (dp1)
|
|
dp = dp1;
|
|
dp1 = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now convert it
|
|
*/
|
|
if (dp) {
|
|
if (dp1)
|
|
l = dp1 - dp;
|
|
else
|
|
l = unlen - (dp - un);
|
|
for (i = 0, j = 8; i < l && j < 11; i++, j++) {
|
|
c = dp[i];
|
|
c = lu_loaded && (c & 0x80) ?
|
|
lu[c & 0x7f] : l2u[c];
|
|
c = U2D(c);
|
|
if (dp[i] != (dn[j] = c)
|
|
&& conv != 3)
|
|
conv = 2;
|
|
if (dn[j] == 1) {
|
|
conv = 3;
|
|
dn[j] = '_';
|
|
}
|
|
if (dn[j] == 2) {
|
|
conv = 3;
|
|
dn[j--] = ' ';
|
|
}
|
|
}
|
|
if (i < l)
|
|
conv = 3;
|
|
dp--;
|
|
} else {
|
|
for (dp = cp; *--dp == ' ' || *dp == '.';);
|
|
dp++;
|
|
}
|
|
|
|
/*
|
|
* Now convert the rest of the name
|
|
*/
|
|
for (i = j = 0; un < dp && j < 8; i++, j++, un++) {
|
|
c = lu_loaded && (*un & 0x80) ?
|
|
lu[*un & 0x7f] : l2u[*un];
|
|
c = U2D(c);
|
|
if (*un != (dn[j] = c)
|
|
&& conv != 3)
|
|
conv = 2;
|
|
if (dn[j] == 1) {
|
|
conv = 3;
|
|
dn[j] = '_';
|
|
}
|
|
if (dn[j] == 2) {
|
|
conv = 3;
|
|
dn[j--] = ' ';
|
|
}
|
|
}
|
|
if (un < dp)
|
|
conv = 3;
|
|
/*
|
|
* If we didn't have any chars in filename,
|
|
* generate a default
|
|
*/
|
|
if (!j)
|
|
dn[0] = '_';
|
|
|
|
/*
|
|
* The first character cannot be E5,
|
|
* because that means a deleted entry
|
|
*/
|
|
if (dn[0] == 0xe5)
|
|
dn[0] = SLOT_E5;
|
|
|
|
/*
|
|
* If there wasn't any char dropped,
|
|
* there is no place for generation numbers
|
|
*/
|
|
if (conv != 3) {
|
|
if (gen > 1)
|
|
return 0;
|
|
return conv;
|
|
}
|
|
|
|
/*
|
|
* Now insert the generation number into the filename part
|
|
*/
|
|
if (gen == 0)
|
|
return conv;
|
|
for (wcp = gentext + sizeof(gentext); wcp > gentext && gen; gen /= 10)
|
|
*--wcp = gen % 10 + '0';
|
|
if (gen)
|
|
return 0;
|
|
for (i = 8; dn[--i] == ' ';);
|
|
i++;
|
|
if (gentext + sizeof(gentext) - wcp + 1 > 8 - i)
|
|
i = 8 - (gentext + sizeof(gentext) - wcp + 1);
|
|
dn[i++] = '~';
|
|
while (wcp < gentext + sizeof(gentext))
|
|
dn[i++] = *wcp++;
|
|
return 3;
|
|
#undef U2D
|
|
}
|
|
|
|
/*
|
|
* Create a Win95 long name directory entry
|
|
* Note: assumes that the filename is valid,
|
|
* i.e. doesn't consist solely of blanks and dots
|
|
*/
|
|
int
|
|
unix2winfn(un, unlen, wep, cnt, chksum, table_loaded, u2w)
|
|
const u_char *un;
|
|
int unlen;
|
|
struct winentry *wep;
|
|
int cnt;
|
|
int chksum;
|
|
int table_loaded;
|
|
u_int16_t *u2w;
|
|
{
|
|
const u_int8_t *cp;
|
|
u_int8_t *wcp;
|
|
int i;
|
|
u_int16_t code;
|
|
|
|
/*
|
|
* Drop trailing blanks and dots
|
|
*/
|
|
for (cp = un + unlen; *--cp == ' ' || *cp == '.'; unlen--);
|
|
|
|
un += (cnt - 1) * WIN_CHARS;
|
|
unlen -= (cnt - 1) * WIN_CHARS;
|
|
|
|
/*
|
|
* Initialize winentry to some useful default
|
|
*/
|
|
for (wcp = (u_int8_t *)wep, i = sizeof(*wep); --i >= 0; *wcp++ = 0xff);
|
|
wep->weCnt = cnt;
|
|
wep->weAttributes = ATTR_WIN95;
|
|
wep->weReserved1 = 0;
|
|
wep->weChksum = chksum;
|
|
wep->weReserved2 = 0;
|
|
|
|
/*
|
|
* Now convert the filename parts
|
|
*/
|
|
for (wcp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
|
|
if (--unlen < 0)
|
|
goto done;
|
|
if (table_loaded && (*un & 0x80)) {
|
|
code = u2w[*un++ & 0x7f];
|
|
*wcp++ = code;
|
|
*wcp++ = code >> 8;
|
|
} else {
|
|
*wcp++ = *un++;
|
|
*wcp++ = 0;
|
|
}
|
|
}
|
|
for (wcp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
|
|
if (--unlen < 0)
|
|
goto done;
|
|
if (table_loaded && (*un & 0x80)) {
|
|
code = u2w[*un++ & 0x7f];
|
|
*wcp++ = code;
|
|
*wcp++ = code >> 8;
|
|
} else {
|
|
*wcp++ = *un++;
|
|
*wcp++ = 0;
|
|
}
|
|
}
|
|
for (wcp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
|
|
if (--unlen < 0)
|
|
goto done;
|
|
if (table_loaded && (*un & 0x80)) {
|
|
code = u2w[*un++ & 0x7f];
|
|
*wcp++ = code;
|
|
*wcp++ = code >> 8;
|
|
} else {
|
|
*wcp++ = *un++;
|
|
*wcp++ = 0;
|
|
}
|
|
}
|
|
if (!unlen)
|
|
wep->weCnt |= WIN_LAST;
|
|
return unlen;
|
|
|
|
done:
|
|
*wcp++ = 0;
|
|
*wcp++ = 0;
|
|
wep->weCnt |= WIN_LAST;
|
|
return 0;
|
|
}
|
|
|
|
static __inline u_int8_t
|
|
find_lcode(code, u2w)
|
|
u_int16_t code;
|
|
u_int16_t *u2w;
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 128; i++)
|
|
if (u2w[i] == code)
|
|
return (i | 0x80);
|
|
return '?';
|
|
}
|
|
|
|
/*
|
|
* Compare our filename to the one in the Win95 entry
|
|
* Returns the checksum or -1 if no match
|
|
*/
|
|
int
|
|
winChkName(un, unlen, wep, chksum, u2w_loaded, u2w, ul_loaded, ul)
|
|
const u_char *un;
|
|
int unlen;
|
|
struct winentry *wep;
|
|
int chksum;
|
|
int u2w_loaded;
|
|
u_int16_t *u2w;
|
|
int ul_loaded;
|
|
u_int8_t *ul;
|
|
{
|
|
u_int8_t *cp;
|
|
int i;
|
|
u_int16_t code;
|
|
u_int8_t c1, c2;
|
|
|
|
/*
|
|
* First compare checksums
|
|
*/
|
|
if (wep->weCnt&WIN_LAST)
|
|
chksum = wep->weChksum;
|
|
else if (chksum != wep->weChksum)
|
|
chksum = -1;
|
|
if (chksum == -1)
|
|
return -1;
|
|
|
|
/*
|
|
* Offset of this entry
|
|
*/
|
|
i = ((wep->weCnt&WIN_CNT) - 1) * WIN_CHARS;
|
|
un += i;
|
|
if ((unlen -= i) <= 0)
|
|
return -1;
|
|
if ((wep->weCnt&WIN_LAST) && unlen > WIN_CHARS)
|
|
return -1;
|
|
|
|
/*
|
|
* Compare the name parts
|
|
*/
|
|
for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
|
|
if (--unlen < 0) {
|
|
if (!*cp++ && !*cp)
|
|
return chksum;
|
|
return -1;
|
|
}
|
|
code = (cp[1] << 8) | cp[0];
|
|
if (code & 0xff80) {
|
|
if (u2w_loaded)
|
|
code = find_lcode(code, u2w);
|
|
else if (code & 0xff00)
|
|
code = '?';
|
|
}
|
|
c1 = ul_loaded && (code & 0x80) ?
|
|
ul[code & 0x7f] : u2l[code];
|
|
c2 = ul_loaded && (*un & 0x80) ?
|
|
ul[*un & 0x7f] : u2l[*un];
|
|
if (c1 != c2)
|
|
return -1;
|
|
cp += 2;
|
|
un++;
|
|
}
|
|
for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
|
|
if (--unlen < 0) {
|
|
if (!*cp++ && !*cp)
|
|
return chksum;
|
|
return -1;
|
|
}
|
|
code = (cp[1] << 8) | cp[0];
|
|
if (code & 0xff80) {
|
|
if (u2w_loaded)
|
|
code = find_lcode(code, u2w);
|
|
else if (code & 0xff00)
|
|
code = '?';
|
|
}
|
|
c1 = ul_loaded && (code & 0x80) ?
|
|
ul[code & 0x7f] : u2l[code];
|
|
c2 = ul_loaded && (*un & 0x80) ?
|
|
ul[*un & 0x7f] : u2l[*un];
|
|
if (c1 != c2)
|
|
return -1;
|
|
cp += 2;
|
|
un++;
|
|
}
|
|
for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
|
|
if (--unlen < 0) {
|
|
if (!*cp++ && !*cp)
|
|
return chksum;
|
|
return -1;
|
|
}
|
|
code = (cp[1] << 8) | cp[0];
|
|
if (code & 0xff80) {
|
|
if (u2w_loaded)
|
|
code = find_lcode(code, u2w);
|
|
else if (code & 0xff00)
|
|
code = '?';
|
|
}
|
|
c1 = ul_loaded && (code & 0x80) ?
|
|
ul[code & 0x7f] : u2l[code];
|
|
c2 = ul_loaded && (*un & 0x80) ?
|
|
ul[*un & 0x7f] : u2l[*un];
|
|
if (c1 != c2)
|
|
return -1;
|
|
cp += 2;
|
|
un++;
|
|
}
|
|
return chksum;
|
|
}
|
|
|
|
/*
|
|
* Convert Win95 filename to dirbuf.
|
|
* Returns the checksum or -1 if impossible
|
|
*/
|
|
int
|
|
win2unixfn(wep, dp, chksum, table_loaded, u2w)
|
|
struct winentry *wep;
|
|
struct dirent *dp;
|
|
int chksum;
|
|
int table_loaded;
|
|
u_int16_t *u2w;
|
|
{
|
|
u_int8_t *cp;
|
|
u_int8_t *np, *ep = dp->d_name + WIN_MAXLEN;
|
|
u_int16_t code;
|
|
int i;
|
|
|
|
if ((wep->weCnt&WIN_CNT) > howmany(WIN_MAXLEN, WIN_CHARS)
|
|
|| !(wep->weCnt&WIN_CNT))
|
|
return -1;
|
|
|
|
/*
|
|
* First compare checksums
|
|
*/
|
|
if (wep->weCnt&WIN_LAST) {
|
|
chksum = wep->weChksum;
|
|
/*
|
|
* This works even though d_namlen is one byte!
|
|
*/
|
|
dp->d_namlen = (wep->weCnt&WIN_CNT) * WIN_CHARS;
|
|
} else if (chksum != wep->weChksum)
|
|
chksum = -1;
|
|
if (chksum == -1)
|
|
return -1;
|
|
|
|
/*
|
|
* Offset of this entry
|
|
*/
|
|
i = ((wep->weCnt&WIN_CNT) - 1) * WIN_CHARS;
|
|
np = (u_int8_t *)dp->d_name + i;
|
|
|
|
/*
|
|
* Convert the name parts
|
|
*/
|
|
for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
|
|
code = (cp[1] << 8) | cp[0];
|
|
switch (code) {
|
|
case 0:
|
|
*np = '\0';
|
|
dp->d_namlen -= sizeof(wep->wePart2)/2
|
|
+ sizeof(wep->wePart3)/2 + i + 1;
|
|
return chksum;
|
|
case '/':
|
|
*np = '\0';
|
|
return -1;
|
|
default:
|
|
if (code & 0xff80) {
|
|
if (table_loaded)
|
|
code = find_lcode(code, u2w);
|
|
else if (code & 0xff00)
|
|
code = '?';
|
|
}
|
|
*np++ = code;
|
|
break;
|
|
}
|
|
/*
|
|
* The size comparison should result in the compiler
|
|
* optimizing the whole if away
|
|
*/
|
|
if (WIN_MAXLEN % WIN_CHARS < sizeof(wep->wePart1) / 2
|
|
&& np > ep) {
|
|
np[-1] = 0;
|
|
return -1;
|
|
}
|
|
cp += 2;
|
|
}
|
|
for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
|
|
code = (cp[1] << 8) | cp[0];
|
|
switch (code) {
|
|
case 0:
|
|
*np = '\0';
|
|
dp->d_namlen -= sizeof(wep->wePart3)/2 + i + 1;
|
|
return chksum;
|
|
case '/':
|
|
*np = '\0';
|
|
return -1;
|
|
default:
|
|
if (code & 0xff80) {
|
|
if (table_loaded)
|
|
code = find_lcode(code, u2w);
|
|
else if (code & 0xff00)
|
|
code = '?';
|
|
}
|
|
*np++ = code;
|
|
break;
|
|
}
|
|
/*
|
|
* The size comparisons should be optimized away
|
|
*/
|
|
if (WIN_MAXLEN % WIN_CHARS >= sizeof(wep->wePart1) / 2
|
|
&& WIN_MAXLEN % WIN_CHARS < (sizeof(wep->wePart1) + sizeof(wep->wePart2)) / 2
|
|
&& np > ep) {
|
|
np[-1] = 0;
|
|
return -1;
|
|
}
|
|
cp += 2;
|
|
}
|
|
for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
|
|
code = (cp[1] << 8) | cp[0];
|
|
switch (code) {
|
|
case 0:
|
|
*np = '\0';
|
|
dp->d_namlen -= i + 1;
|
|
return chksum;
|
|
case '/':
|
|
*np = '\0';
|
|
return -1;
|
|
default:
|
|
if (code & 0xff80) {
|
|
if (table_loaded)
|
|
code = find_lcode(code, u2w);
|
|
else if (code & 0xff00)
|
|
code = '?';
|
|
}
|
|
*np++ = code;
|
|
break;
|
|
}
|
|
/*
|
|
* See above
|
|
*/
|
|
if (WIN_MAXLEN % WIN_CHARS >= (sizeof(wep->wePart1) + sizeof(wep->wePart2)) / 2
|
|
&& np > ep) {
|
|
np[-1] = 0;
|
|
return -1;
|
|
}
|
|
cp += 2;
|
|
}
|
|
return chksum;
|
|
}
|
|
|
|
/*
|
|
* Compute the checksum of a DOS filename for Win95 use
|
|
*/
|
|
u_int8_t
|
|
winChksum(name)
|
|
u_int8_t *name;
|
|
{
|
|
int i;
|
|
u_int8_t s;
|
|
|
|
for (s = 0, i = 11; --i >= 0; s += *name++)
|
|
s = (s << 7)|(s >> 1);
|
|
return s;
|
|
}
|
|
|
|
/*
|
|
* Determine the number of slots necessary for Win95 names
|
|
*/
|
|
int
|
|
winSlotCnt(un, unlen)
|
|
const u_char *un;
|
|
int unlen;
|
|
{
|
|
unlen = winLenFixup(un, unlen);
|
|
if (unlen > WIN_MAXLEN)
|
|
return 0;
|
|
return howmany(unlen, WIN_CHARS);
|
|
}
|
|
|
|
/*
|
|
* Determine the number of bytes neccesary for Win95 names
|
|
*/
|
|
int
|
|
winLenFixup(un, unlen)
|
|
const u_char* un;
|
|
int unlen;
|
|
{
|
|
for (un += unlen; unlen > 0; unlen--)
|
|
if (*--un != ' ' && *un != '.')
|
|
break;
|
|
return unlen;
|
|
}
|