msdosfs_conv.c revision 36133
136133Sdt/* $Id: msdosfs_conv.c,v 1.26 1998/04/15 17:46:37 bde Exp $ */ 233548Sjkh/* $NetBSD: msdosfs_conv.c,v 1.25 1997/11/17 15:36:40 ws Exp $ */ 32893Sdfr 433548Sjkh/*- 533548Sjkh * Copyright (C) 1995, 1997 Wolfgang Solfrank. 633548Sjkh * Copyright (C) 1995, 1997 TooLs GmbH. 733548Sjkh * All rights reserved. 833548Sjkh * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). 933548Sjkh * 1033548Sjkh * Redistribution and use in source and binary forms, with or without 1133548Sjkh * modification, are permitted provided that the following conditions 1233548Sjkh * are met: 1333548Sjkh * 1. Redistributions of source code must retain the above copyright 1433548Sjkh * notice, this list of conditions and the following disclaimer. 1533548Sjkh * 2. Redistributions in binary form must reproduce the above copyright 1633548Sjkh * notice, this list of conditions and the following disclaimer in the 1733548Sjkh * documentation and/or other materials provided with the distribution. 1833548Sjkh * 3. All advertising materials mentioning features or use of this software 1933548Sjkh * must display the following acknowledgement: 2033548Sjkh * This product includes software developed by TooLs GmbH. 2133548Sjkh * 4. The name of TooLs GmbH may not be used to endorse or promote products 2233548Sjkh * derived from this software without specific prior written permission. 2333548Sjkh * 2433548Sjkh * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 2533548Sjkh * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 2633548Sjkh * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2733548Sjkh * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2833548Sjkh * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 2933548Sjkh * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 3033548Sjkh * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 3133548Sjkh * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 3233548Sjkh * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 3333548Sjkh * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3433548Sjkh */ 352893Sdfr/* 362893Sdfr * Written by Paul Popelka (paulp@uts.amdahl.com) 378876Srgrimes * 382893Sdfr * You can do anything you want with this software, just don't say you wrote 392893Sdfr * it, and don't remove this notice. 408876Srgrimes * 412893Sdfr * This software is provided "as is". 428876Srgrimes * 432893Sdfr * The author supplies this software to be publicly redistributed on the 442893Sdfr * understanding that the author is not responsible for the correct 452893Sdfr * functioning of this software in any circumstances and is not liable for 462893Sdfr * any damages caused by this software. 478876Srgrimes * 482893Sdfr * October 1992 492893Sdfr */ 502893Sdfr 512893Sdfr/* 522893Sdfr * System include files. 532893Sdfr */ 542893Sdfr#include <sys/param.h> 552893Sdfr#include <sys/time.h> 562893Sdfr#include <sys/kernel.h> /* defines tz */ 5733548Sjkh#include <sys/systm.h> 587465Sache#include <machine/clock.h> 5933548Sjkh#include <sys/dirent.h> 602893Sdfr 612893Sdfr/* 622893Sdfr * MSDOSFS include files. 632893Sdfr */ 642893Sdfr#include <msdosfs/direntry.h> 652893Sdfr 662893Sdfr/* 677465Sache * Total number of days that have passed for each month in a regular year. 682893Sdfr */ 6912144Sphkstatic u_short regyear[] = { 707465Sache 31, 59, 90, 120, 151, 181, 717465Sache 212, 243, 273, 304, 334, 365 722893Sdfr}; 732893Sdfr 742893Sdfr/* 757465Sache * Total number of days that have passed for each month in a leap year. 762893Sdfr */ 7712144Sphkstatic u_short leapyear[] = { 787465Sache 31, 60, 91, 121, 152, 182, 797465Sache 213, 244, 274, 305, 335, 366 802893Sdfr}; 812893Sdfr 822893Sdfr/* 832893Sdfr * Variables used to remember parts of the last time conversion. Maybe we 842893Sdfr * can avoid a full conversion. 852893Sdfr */ 8633181Seivindstatic u_long lasttime; 8733181Seivindstatic u_long lastday; 8833181Seivindstatic u_short lastddate; 8933181Seivindstatic u_short lastdtime; 902893Sdfr 9135210Sbdestatic __inline u_int8_t find_lcode __P((u_int16_t code, u_int16_t *u2w)); 9233747Sache 932893Sdfr/* 942893Sdfr * Convert the unix version of time to dos's idea of time to be used in 952893Sdfr * file timestamps. The passed in unix time is assumed to be in GMT. 962893Sdfr */ 972893Sdfrvoid 9833548Sjkhunix2dostime(tsp, ddp, dtp, dhp) 992893Sdfr struct timespec *tsp; 10033548Sjkh u_int16_t *ddp; 10133548Sjkh u_int16_t *dtp; 10233548Sjkh u_int8_t *dhp; 1032893Sdfr{ 1042893Sdfr u_long t; 1052893Sdfr u_long days; 1062893Sdfr u_long inc; 1072893Sdfr u_long year; 1082893Sdfr u_long month; 1092893Sdfr u_short *months; 1102893Sdfr 1112893Sdfr /* 1122893Sdfr * If the time from the last conversion is the same as now, then 1132893Sdfr * skip the computations and use the saved result. 1142893Sdfr */ 11518397Snate t = tsp->tv_sec - (tz.tz_minuteswest * 60) 11615055Sache - (wall_cmos_clock ? adjkerntz : 0); 11715053Sache /* - daylight savings time correction */ 11833548Sjkh t &= ~1; 1192893Sdfr if (lasttime != t) { 1202893Sdfr lasttime = t; 12133548Sjkh lastdtime = (((t / 2) % 30) << DT_2SECONDS_SHIFT) 1222893Sdfr + (((t / 60) % 60) << DT_MINUTES_SHIFT) 1232893Sdfr + (((t / 3600) % 24) << DT_HOURS_SHIFT); 1242893Sdfr 1252893Sdfr /* 1262893Sdfr * If the number of days since 1970 is the same as the last 1272893Sdfr * time we did the computation then skip all this leap year 1282893Sdfr * and month stuff. 1292893Sdfr */ 1302893Sdfr days = t / (24 * 60 * 60); 1312893Sdfr if (days != lastday) { 1322893Sdfr lastday = days; 1332893Sdfr for (year = 1970;; year++) { 1342893Sdfr inc = year & 0x03 ? 365 : 366; 1352893Sdfr if (days < inc) 1362893Sdfr break; 1372893Sdfr days -= inc; 1382893Sdfr } 1392893Sdfr months = year & 0x03 ? regyear : leapyear; 14020138Sbde for (month = 0; days >= months[month]; month++) 1417465Sache ; 1427465Sache if (month > 0) 1437465Sache days -= months[month - 1]; 1442893Sdfr lastddate = ((days + 1) << DD_DAY_SHIFT) 1452893Sdfr + ((month + 1) << DD_MONTH_SHIFT); 1462893Sdfr /* 1472893Sdfr * Remember dos's idea of time is relative to 1980. 1482893Sdfr * unix's is relative to 1970. If somehow we get a 1492893Sdfr * time before 1980 then don't give totally crazy 1502893Sdfr * results. 1512893Sdfr */ 1522893Sdfr if (year > 1980) 1532893Sdfr lastddate += (year - 1980) << DD_YEAR_SHIFT; 1542893Sdfr } 1552893Sdfr } 15633548Sjkh if (dtp) 15733548Sjkh *dtp = lastdtime; 15833548Sjkh if (dhp) 15933548Sjkh *dhp = (tsp->tv_sec & 1) * 100 + tsp->tv_nsec / 10000000; 16033548Sjkh 1612893Sdfr *ddp = lastddate; 1622893Sdfr} 1632893Sdfr 1642893Sdfr/* 1652893Sdfr * The number of seconds between Jan 1, 1970 and Jan 1, 1980. In that 1662893Sdfr * interval there were 8 regular years and 2 leap years. 1672893Sdfr */ 1682893Sdfr#define SECONDSTO1980 (((8 * 365) + (2 * 366)) * (24 * 60 * 60)) 1692893Sdfr 17033181Seivindstatic u_short lastdosdate; 17133181Seivindstatic u_long lastseconds; 1722893Sdfr 1732893Sdfr/* 1742893Sdfr * Convert from dos' idea of time to unix'. This will probably only be 1752893Sdfr * called from the stat(), and fstat() system calls and so probably need 1762893Sdfr * not be too efficient. 1772893Sdfr */ 1782893Sdfrvoid 17933548Sjkhdos2unixtime(dd, dt, dh, tsp) 18033548Sjkh u_int dd; 18133548Sjkh u_int dt; 18233548Sjkh u_int dh; 1832893Sdfr struct timespec *tsp; 1842893Sdfr{ 1852893Sdfr u_long seconds; 18611921Sphk u_long month; 18711921Sphk u_long year; 1882893Sdfr u_long days; 1892893Sdfr u_short *months; 1902893Sdfr 19133548Sjkh if (dd == 0) { 19233548Sjkh /* 19333548Sjkh * Uninitialized field, return the epoch. 19433548Sjkh */ 19533548Sjkh tsp->tv_sec = 0; 19633548Sjkh tsp->tv_nsec = 0; 19733548Sjkh return; 19833548Sjkh } 1995083Sbde seconds = (((dt & DT_2SECONDS_MASK) >> DT_2SECONDS_SHIFT) << 1) 2002893Sdfr + ((dt & DT_MINUTES_MASK) >> DT_MINUTES_SHIFT) * 60 20133548Sjkh + ((dt & DT_HOURS_MASK) >> DT_HOURS_SHIFT) * 3600 20233548Sjkh + dh / 100; 2032893Sdfr /* 2042893Sdfr * If the year, month, and day from the last conversion are the 2052893Sdfr * same then use the saved value. 2062893Sdfr */ 2072893Sdfr if (lastdosdate != dd) { 2082893Sdfr lastdosdate = dd; 2092893Sdfr days = 0; 2102893Sdfr year = (dd & DD_YEAR_MASK) >> DD_YEAR_SHIFT; 2117465Sache days = year * 365; 2127465Sache days += year / 4 + 1; /* add in leap days */ 2137465Sache if ((year & 0x03) == 0) 2147465Sache days--; /* if year is a leap year */ 2152893Sdfr months = year & 0x03 ? regyear : leapyear; 2162893Sdfr month = (dd & DD_MONTH_MASK) >> DD_MONTH_SHIFT; 2177465Sache if (month < 1 || month > 12) { 21833548Sjkh printf("dos2unixtime(): month value out of range (%ld)\n", 2193152Sphk month); 2202893Sdfr month = 1; 2212893Sdfr } 2227465Sache if (month > 1) 2237465Sache days += months[month - 2]; 2242893Sdfr days += ((dd & DD_DAY_MASK) >> DD_DAY_SHIFT) - 1; 2252893Sdfr lastseconds = (days * 24 * 60 * 60) + SECONDSTO1980; 2262893Sdfr } 22718397Snate tsp->tv_sec = seconds + lastseconds + (tz.tz_minuteswest * 60) 22815055Sache + adjkerntz; 22915053Sache /* + daylight savings time correction */ 23033548Sjkh tsp->tv_nsec = (dh % 100) * 10000000; 2312893Sdfr} 2322893Sdfr 23333872Smsmith/* 23433872Smsmith * 0 - character disallowed in long file name. 23533872Smsmith * 1 - character should be replaced by '_' in DOS file name, 23633872Smsmith * and generation number inserted. 23733872Smsmith * 2 - character ('.' and ' ') should be skipped in DOS file name, 23833872Smsmith * and generation number inserted. 23933872Smsmith */ 24033548Sjkhstatic u_char 24133548Sjkhunix2dos[256] = { 24233548Sjkh 0, 0, 0, 0, 0, 0, 0, 0, /* 00-07 */ 24333548Sjkh 0, 0, 0, 0, 0, 0, 0, 0, /* 08-0f */ 24433548Sjkh 0, 0, 0, 0, 0, 0, 0, 0, /* 10-17 */ 24533548Sjkh 0, 0, 0, 0, 0, 0, 0, 0, /* 18-1f */ 24633872Smsmith 2, 0x21, 0, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */ 24733872Smsmith 0x28, 0x29, 0, 1, 1, 0x2d, 2, 0, /* 28-2f */ 24833548Sjkh 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */ 24933872Smsmith 0x38, 0x39, 0, 1, 0, 1, 0, 0, /* 38-3f */ 25033548Sjkh 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */ 25133548Sjkh 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */ 25233548Sjkh 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */ 25333872Smsmith 0x58, 0x59, 0x5a, 1, 0, 1, 0x5e, 0x5f, /* 58-5f */ 25433548Sjkh 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 60-67 */ 25533548Sjkh 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 68-6f */ 25633548Sjkh 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 70-77 */ 25733548Sjkh 0x58, 0x59, 0x5a, 0x7b, 0, 0x7d, 0x7e, 0, /* 78-7f */ 25833548Sjkh 0, 0, 0, 0, 0, 0, 0, 0, /* 80-87 */ 25933548Sjkh 0, 0, 0, 0, 0, 0, 0, 0, /* 88-8f */ 26033548Sjkh 0, 0, 0, 0, 0, 0, 0, 0, /* 90-97 */ 26133548Sjkh 0, 0, 0, 0, 0, 0, 0, 0, /* 98-9f */ 26233548Sjkh 0, 0xad, 0xbd, 0x9c, 0xcf, 0xbe, 0xdd, 0xf5, /* a0-a7 */ 26333548Sjkh 0xf9, 0xb8, 0xa6, 0xae, 0xaa, 0xf0, 0xa9, 0xee, /* a8-af */ 26433548Sjkh 0xf8, 0xf1, 0xfd, 0xfc, 0xef, 0xe6, 0xf4, 0xfa, /* b0-b7 */ 26533548Sjkh 0xf7, 0xfb, 0xa7, 0xaf, 0xac, 0xab, 0xf3, 0xa8, /* b8-bf */ 26633548Sjkh 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* c0-c7 */ 26733548Sjkh 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* c8-cf */ 26833548Sjkh 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0x9e, /* d0-d7 */ 26933548Sjkh 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0xe1, /* d8-df */ 27033548Sjkh 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* e0-e7 */ 27133548Sjkh 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* e8-ef */ 27233548Sjkh 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0xf6, /* f0-f7 */ 27333548Sjkh 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0x98, /* f8-ff */ 27433548Sjkh}; 2752893Sdfr 27633548Sjkhstatic u_char 27733548Sjkhdos2unix[256] = { 27833548Sjkh 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 00-07 */ 27933548Sjkh 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 08-0f */ 28033548Sjkh 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 10-17 */ 28133548Sjkh 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 18-1f */ 28233548Sjkh 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */ 28333548Sjkh 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */ 28433548Sjkh 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */ 28533548Sjkh 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */ 28633548Sjkh 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */ 28733548Sjkh 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */ 28833548Sjkh 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */ 28933548Sjkh 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */ 29033548Sjkh 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */ 29133548Sjkh 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */ 29233548Sjkh 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */ 29333548Sjkh 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */ 29433548Sjkh 0xc7, 0xfc, 0xe9, 0xe2, 0xe4, 0xe0, 0xe5, 0xe7, /* 80-87 */ 29533548Sjkh 0xea, 0xeb, 0xe8, 0xef, 0xee, 0xec, 0xc4, 0xc5, /* 88-8f */ 29633548Sjkh 0xc9, 0xe6, 0xc6, 0xf4, 0xf6, 0xf2, 0xfb, 0xf9, /* 90-97 */ 29733548Sjkh 0xff, 0xd6, 0xdc, 0xf8, 0xa3, 0xd8, 0xd7, 0x3f, /* 98-9f */ 29833548Sjkh 0xe1, 0xed, 0xf3, 0xfa, 0xf1, 0xd1, 0xaa, 0xba, /* a0-a7 */ 29933548Sjkh 0xbf, 0xae, 0xac, 0xbd, 0xbc, 0xa1, 0xab, 0xbb, /* a8-af */ 30033548Sjkh 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xc1, 0xc2, 0xc0, /* b0-b7 */ 30133548Sjkh 0xa9, 0x3f, 0x3f, 0x3f, 0x3f, 0xa2, 0xa5, 0x3f, /* b8-bf */ 30233548Sjkh 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xe3, 0xc3, /* c0-c7 */ 30333548Sjkh 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xa4, /* c8-cf */ 30433548Sjkh 0xf0, 0xd0, 0xca, 0xcb, 0xc8, 0x3f, 0xcd, 0xce, /* d0-d7 */ 30533548Sjkh 0xcf, 0x3f, 0x3f, 0x3f, 0x3f, 0xa6, 0xcc, 0x3f, /* d8-df */ 30633548Sjkh 0xd3, 0xdf, 0xd4, 0xd2, 0xf5, 0xd5, 0xb5, 0xfe, /* e0-e7 */ 30733548Sjkh 0xde, 0xda, 0xdb, 0xd9, 0xfd, 0xdd, 0xaf, 0x3f, /* e8-ef */ 30833548Sjkh 0xad, 0xb1, 0x3f, 0xbe, 0xb6, 0xa7, 0xf7, 0xb8, /* f0-f7 */ 30933548Sjkh 0xb0, 0xa8, 0xb7, 0xb9, 0xb3, 0xb2, 0x3f, 0x3f, /* f8-ff */ 31033548Sjkh}; 31133548Sjkh 31233548Sjkhstatic u_char 31333548Sjkhu2l[256] = { 31433548Sjkh 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */ 31533548Sjkh 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */ 31633548Sjkh 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */ 31733548Sjkh 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */ 31833548Sjkh 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */ 31933548Sjkh 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */ 32033548Sjkh 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */ 32133548Sjkh 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */ 32233548Sjkh 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */ 32333548Sjkh 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */ 32433548Sjkh 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */ 32533548Sjkh 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */ 32633548Sjkh 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */ 32733548Sjkh 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */ 32833548Sjkh 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */ 32933548Sjkh 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */ 33033548Sjkh 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */ 33133548Sjkh 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */ 33233548Sjkh 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */ 33333548Sjkh 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */ 33433548Sjkh 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */ 33533548Sjkh 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */ 33633548Sjkh 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */ 33733548Sjkh 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */ 33833548Sjkh 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */ 33933548Sjkh 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */ 34033548Sjkh 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */ 34133548Sjkh 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */ 34233548Sjkh 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */ 34333548Sjkh 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */ 34433548Sjkh 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */ 34533548Sjkh 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */ 34633548Sjkh}; 34733548Sjkh 34833768Sachestatic u_char 34933768Sachel2u[256] = { 35033768Sache 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */ 35133768Sache 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */ 35233768Sache 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */ 35333768Sache 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */ 35433768Sache 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */ 35533768Sache 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */ 35633768Sache 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */ 35733768Sache 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */ 35833768Sache 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */ 35933768Sache 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */ 36033768Sache 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */ 36133768Sache 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */ 36233768Sache 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */ 36333768Sache 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */ 36433768Sache 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */ 36533768Sache 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */ 36633768Sache 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */ 36733768Sache 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */ 36833768Sache 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */ 36933768Sache 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */ 37033768Sache 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */ 37133768Sache 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */ 37233768Sache 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */ 37333768Sache 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */ 37433768Sache 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */ 37533768Sache 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */ 37633768Sache 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */ 37733768Sache 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */ 37833768Sache 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */ 37933768Sache 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */ 38033768Sache 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */ 38133768Sache 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */ 38233768Sache}; 38333768Sache 3842893Sdfr/* 3852893Sdfr * DOS filenames are made of 2 parts, the name part and the extension part. 3862893Sdfr * The name part is 8 characters long and the extension part is 3 3872893Sdfr * characters long. They may contain trailing blanks if the name or 3882893Sdfr * extension are not long enough to fill their respective fields. 3892893Sdfr */ 3902893Sdfr 3912893Sdfr/* 3922893Sdfr * Convert a DOS filename to a unix filename. And, return the number of 3932893Sdfr * characters in the resulting unix filename excluding the terminating 3942893Sdfr * null. 3952893Sdfr */ 3962893Sdfrint 39733791Sachedos2unixfn(dn, un, lower, d2u_loaded, d2u, ul_loaded, ul) 3982893Sdfr u_char dn[11]; 3992893Sdfr u_char *un; 40033791Sache int lower; 40133768Sache int d2u_loaded; 40233768Sache u_int8_t *d2u; 40333768Sache int ul_loaded; 40433760Sache u_int8_t *ul; 4052893Sdfr{ 4062893Sdfr int i; 40733548Sjkh int thislong = 1; 4082893Sdfr u_char c; 4092893Sdfr 4102893Sdfr /* 41133548Sjkh * If first char of the filename is SLOT_E5 (0x05), then the real 41233548Sjkh * first char of the filename should be 0xe5. But, they couldn't 41333548Sjkh * just have a 0xe5 mean 0xe5 because that is used to mean a freed 41433548Sjkh * directory slot. Another dos quirk. 4152893Sdfr */ 41633548Sjkh if (*dn == SLOT_E5) 41733768Sache c = d2u_loaded ? d2u[0xe5 & 0x7f] : dos2unix[0xe5]; 41833548Sjkh else 41933768Sache c = d2u_loaded && (*dn & 0x80) ? d2u[*dn & 0x7f] : 42033768Sache dos2unix[*dn]; 42133791Sache *un++ = lower ? (ul_loaded && (c & 0x80) ? 42233791Sache ul[c & 0x7f] : u2l[c]) : c; 42333548Sjkh dn++; 4242893Sdfr 4252893Sdfr /* 42633548Sjkh * Copy the name portion into the unix filename string. 4272893Sdfr */ 42833548Sjkh for (i = 1; i < 8 && *dn != ' '; i++) { 42933768Sache c = d2u_loaded && (*dn & 0x80) ? d2u[*dn & 0x7f] : 43033768Sache dos2unix[*dn]; 43133768Sache dn++; 43233791Sache *un++ = lower ? (ul_loaded && (c & 0x80) ? 43333791Sache ul[c & 0x7f] : u2l[c]) : c; 4342893Sdfr thislong++; 4352893Sdfr } 43633548Sjkh dn += 8 - i; 4372893Sdfr 4382893Sdfr /* 4392893Sdfr * Now, if there is an extension then put in a period and copy in 4402893Sdfr * the extension. 4412893Sdfr */ 44233548Sjkh if (*dn != ' ') { 4432893Sdfr *un++ = '.'; 4442893Sdfr thislong++; 44533548Sjkh for (i = 0; i < 3 && *dn != ' '; i++) { 44633768Sache c = d2u_loaded && (*dn & 0x80) ? d2u[*dn & 0x7f] : 44733768Sache dos2unix[*dn]; 44833768Sache dn++; 44933791Sache *un++ = lower ? (ul_loaded && (c & 0x80) ? 45033791Sache ul[c & 0x7f] : u2l[c]) : c; 4512893Sdfr thislong++; 4522893Sdfr } 4532893Sdfr } 4542893Sdfr *un++ = 0; 4552893Sdfr 45633548Sjkh return (thislong); 4572893Sdfr} 4582893Sdfr 4592893Sdfr/* 46033548Sjkh * Convert a unix filename to a DOS filename according to Win95 rules. 46133548Sjkh * If applicable and gen is not 0, it is inserted into the converted 46233548Sjkh * filename as a generation number. 46333548Sjkh * Returns 46433548Sjkh * 0 if name couldn't be converted 46533548Sjkh * 1 if the converted name is the same as the original 46633548Sjkh * (no long filename entry necessary for Win95) 46733548Sjkh * 2 if conversion was successful 46833548Sjkh * 3 if conversion was successful and generation number was inserted 4692893Sdfr */ 47033548Sjkhint 47133768Sacheunix2dosfn(un, dn, unlen, gen, u2d_loaded, u2d, lu_loaded, lu) 47233548Sjkh const u_char *un; 47333548Sjkh u_char dn[12]; 4742893Sdfr int unlen; 47533548Sjkh u_int gen; 47633768Sache int u2d_loaded; 47733768Sache u_int8_t *u2d; 47833768Sache int lu_loaded; 47933768Sache u_int8_t *lu; 4802893Sdfr{ 48133548Sjkh int i, j, l; 48233548Sjkh int conv = 1; 48333548Sjkh const u_char *cp, *dp, *dp1; 48433548Sjkh u_char gentext[6], *wcp; 48533768Sache u_int8_t c; 48633872Smsmith#define U2D(c) (u2d_loaded && ((c) & 0x80) ? u2d[(c) & 0x7f] : unix2dos[c]) 4872893Sdfr 4882893Sdfr /* 4892893Sdfr * Fill the dos filename string with blanks. These are DOS's pad 4902893Sdfr * characters. 4912893Sdfr */ 49233548Sjkh for (i = 0; i < 11; i++) 4932893Sdfr dn[i] = ' '; 49433548Sjkh dn[11] = 0; 4952893Sdfr 4962893Sdfr /* 4972893Sdfr * The filenames "." and ".." are handled specially, since they 4982893Sdfr * don't follow dos filename rules. 4992893Sdfr */ 5002893Sdfr if (un[0] == '.' && unlen == 1) { 5012893Sdfr dn[0] = '.'; 50233548Sjkh return gen <= 1; 5032893Sdfr } 5042893Sdfr if (un[0] == '.' && un[1] == '.' && unlen == 2) { 5052893Sdfr dn[0] = '.'; 5062893Sdfr dn[1] = '.'; 50733548Sjkh return gen <= 1; 5082893Sdfr } 5092893Sdfr 5102893Sdfr /* 51133548Sjkh * Filenames with only blanks and dots are not allowed! 5122893Sdfr */ 51333548Sjkh for (cp = un, i = unlen; --i >= 0; cp++) 51433548Sjkh if (*cp != ' ' && *cp != '.') 51533548Sjkh break; 51633548Sjkh if (i < 0) 51733548Sjkh return 0; 51833548Sjkh 51933872Smsmith 52033548Sjkh /* 52133872Smsmith * Filenames with some characters are not allowed! 52233872Smsmith */ 52333872Smsmith for (cp = un, i = unlen; --i >= 0; cp++) 52433872Smsmith if (U2D(*cp) == 0) 52533872Smsmith return 0; 52633872Smsmith 52733872Smsmith /* 52833548Sjkh * Now find the extension 52933548Sjkh * Note: dot as first char doesn't start extension 53033548Sjkh * and trailing dots and blanks are ignored 53133548Sjkh */ 53233548Sjkh dp = dp1 = 0; 53333548Sjkh for (cp = un + 1, i = unlen - 1; --i >= 0;) { 53433548Sjkh switch (*cp++) { 53533548Sjkh case '.': 53633548Sjkh if (!dp1) 53733548Sjkh dp1 = cp; 53833548Sjkh break; 53933548Sjkh case ' ': 54033548Sjkh break; 54133548Sjkh default: 54233548Sjkh if (dp1) 54333548Sjkh dp = dp1; 54433548Sjkh dp1 = 0; 54533548Sjkh break; 54633548Sjkh } 5472893Sdfr } 5482893Sdfr 5492893Sdfr /* 55033548Sjkh * Now convert it 5512893Sdfr */ 55233548Sjkh if (dp) { 55333548Sjkh if (dp1) 55433548Sjkh l = dp1 - dp; 55533548Sjkh else 55633548Sjkh l = unlen - (dp - un); 55733548Sjkh for (i = 0, j = 8; i < l && j < 11; i++, j++) { 55833768Sache c = dp[i]; 55933768Sache c = lu_loaded && (c & 0x80) ? 56033768Sache lu[c & 0x7f] : l2u[c]; 56133872Smsmith c = U2D(c); 56233768Sache if (dp[i] != (dn[j] = c) 56333548Sjkh && conv != 3) 56433548Sjkh conv = 2; 56533872Smsmith if (dn[j] == 1) { 56633548Sjkh conv = 3; 56733872Smsmith dn[j] = '_'; 56833872Smsmith } 56933872Smsmith if (dn[j] == 2) { 57033872Smsmith conv = 3; 57133548Sjkh dn[j--] = ' '; 57233548Sjkh } 57333548Sjkh } 57433548Sjkh if (i < l) 57533548Sjkh conv = 3; 57633548Sjkh dp--; 57733548Sjkh } else { 57833548Sjkh for (dp = cp; *--dp == ' ' || *dp == '.';); 57933548Sjkh dp++; 58033548Sjkh } 58133548Sjkh 58233548Sjkh /* 58333548Sjkh * Now convert the rest of the name 58433548Sjkh */ 58533548Sjkh for (i = j = 0; un < dp && j < 8; i++, j++, un++) { 58633768Sache c = lu_loaded && (*un & 0x80) ? 58733768Sache lu[*un & 0x7f] : l2u[*un]; 58833872Smsmith c = U2D(c); 58933768Sache if (*un != (dn[j] = c) 59033548Sjkh && conv != 3) 59133548Sjkh conv = 2; 59233872Smsmith if (dn[j] == 1) { 59333548Sjkh conv = 3; 59433872Smsmith dn[j] = '_'; 59533872Smsmith } 59633872Smsmith if (dn[j] == 2) { 59733872Smsmith conv = 3; 59833548Sjkh dn[j--] = ' '; 59933548Sjkh } 60033548Sjkh } 60133548Sjkh if (un < dp) 60233548Sjkh conv = 3; 60333548Sjkh /* 60433548Sjkh * If we didn't have any chars in filename, 60533548Sjkh * generate a default 60633548Sjkh */ 60733548Sjkh if (!j) 60833548Sjkh dn[0] = '_'; 60933548Sjkh 61033548Sjkh /* 61133548Sjkh * The first character cannot be E5, 61233548Sjkh * because that means a deleted entry 61333548Sjkh */ 61433548Sjkh if (dn[0] == 0xe5) 6152893Sdfr dn[0] = SLOT_E5; 6162893Sdfr 6172893Sdfr /* 61833548Sjkh * If there wasn't any char dropped, 61933548Sjkh * there is no place for generation numbers 6202893Sdfr */ 62133548Sjkh if (conv != 3) { 62233548Sjkh if (gen > 1) 62333548Sjkh return 0; 62433548Sjkh return conv; 6252893Sdfr } 6262893Sdfr 6272893Sdfr /* 62833548Sjkh * Now insert the generation number into the filename part 6292893Sdfr */ 63036133Sdt if (gen == 0) 63136133Sdt return conv; 63233548Sjkh for (wcp = gentext + sizeof(gentext); wcp > gentext && gen; gen /= 10) 63333548Sjkh *--wcp = gen % 10 + '0'; 63433548Sjkh if (gen) 63533548Sjkh return 0; 63633548Sjkh for (i = 8; dn[--i] == ' ';); 63733548Sjkh i++; 63833548Sjkh if (gentext + sizeof(gentext) - wcp + 1 > 8 - i) 63933548Sjkh i = 8 - (gentext + sizeof(gentext) - wcp + 1); 64033548Sjkh dn[i++] = '~'; 64133548Sjkh while (wcp < gentext + sizeof(gentext)) 64233548Sjkh dn[i++] = *wcp++; 64333548Sjkh return 3; 64433872Smsmith#undef U2D 64533548Sjkh} 64633548Sjkh 64733548Sjkh/* 64833548Sjkh * Create a Win95 long name directory entry 64933548Sjkh * Note: assumes that the filename is valid, 65033548Sjkh * i.e. doesn't consist solely of blanks and dots 65133548Sjkh */ 65233548Sjkhint 65333768Sacheunix2winfn(un, unlen, wep, cnt, chksum, table_loaded, u2w) 65433548Sjkh const u_char *un; 65533548Sjkh int unlen; 65633548Sjkh struct winentry *wep; 65733548Sjkh int cnt; 65833548Sjkh int chksum; 65933768Sache int table_loaded; 66033747Sache u_int16_t *u2w; 66133548Sjkh{ 66233548Sjkh const u_int8_t *cp; 66333548Sjkh u_int8_t *wcp; 66433548Sjkh int i; 66533747Sache u_int16_t code; 66633548Sjkh 66733548Sjkh /* 66833548Sjkh * Drop trailing blanks and dots 66933548Sjkh */ 67033548Sjkh for (cp = un + unlen; *--cp == ' ' || *cp == '.'; unlen--); 67133548Sjkh 67233548Sjkh un += (cnt - 1) * WIN_CHARS; 67333548Sjkh unlen -= (cnt - 1) * WIN_CHARS; 67433548Sjkh 67533548Sjkh /* 67633548Sjkh * Initialize winentry to some useful default 67733548Sjkh */ 67833548Sjkh for (wcp = (u_int8_t *)wep, i = sizeof(*wep); --i >= 0; *wcp++ = 0xff); 67933548Sjkh wep->weCnt = cnt; 68033548Sjkh wep->weAttributes = ATTR_WIN95; 68133548Sjkh wep->weReserved1 = 0; 68233548Sjkh wep->weChksum = chksum; 68333548Sjkh wep->weReserved2 = 0; 68433548Sjkh 68533548Sjkh /* 68633548Sjkh * Now convert the filename parts 68733548Sjkh */ 68833548Sjkh for (wcp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) { 68933548Sjkh if (--unlen < 0) 69033548Sjkh goto done; 69133747Sache if (table_loaded && (*un & 0x80)) { 69233747Sache code = u2w[*un++ & 0x7f]; 69333747Sache *wcp++ = code; 69433747Sache *wcp++ = code >> 8; 69533747Sache } else { 69633747Sache *wcp++ = *un++; 69733747Sache *wcp++ = 0; 69833747Sache } 6992893Sdfr } 70033548Sjkh for (wcp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) { 70133548Sjkh if (--unlen < 0) 70233548Sjkh goto done; 70333747Sache if (table_loaded && (*un & 0x80)) { 70433747Sache code = u2w[*un++ & 0x7f]; 70533747Sache *wcp++ = code; 70633747Sache *wcp++ = code >> 8; 70733747Sache } else { 70833747Sache *wcp++ = *un++; 70933747Sache *wcp++ = 0; 71033747Sache } 71133548Sjkh } 71233548Sjkh for (wcp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) { 71333548Sjkh if (--unlen < 0) 71433548Sjkh goto done; 71533747Sache if (table_loaded && (*un & 0x80)) { 71633747Sache code = u2w[*un++ & 0x7f]; 71733747Sache *wcp++ = code; 71833747Sache *wcp++ = code >> 8; 71933747Sache } else { 72033747Sache *wcp++ = *un++; 72133747Sache *wcp++ = 0; 72233747Sache } 72333548Sjkh } 72433548Sjkh if (!unlen) 72533548Sjkh wep->weCnt |= WIN_LAST; 72633548Sjkh return unlen; 72733548Sjkh 72833548Sjkhdone: 72933548Sjkh *wcp++ = 0; 73033548Sjkh *wcp++ = 0; 73133548Sjkh wep->weCnt |= WIN_LAST; 73233548Sjkh return 0; 7332893Sdfr} 7342893Sdfr 73535210Sbdestatic __inline u_int8_t 73633750Sachefind_lcode(code, u2w) 73733750Sache u_int16_t code; 73833750Sache u_int16_t *u2w; 73933750Sache{ 74033750Sache int i; 74133750Sache 74233750Sache for (i = 0; i < 128; i++) 74333750Sache if (u2w[i] == code) 74433750Sache return (i | 0x80); 74533750Sache return '?'; 74633750Sache} 74733750Sache 7482893Sdfr/* 74933548Sjkh * Compare our filename to the one in the Win95 entry 75033548Sjkh * Returns the checksum or -1 if no match 7512893Sdfr */ 75233548Sjkhint 75333791SachewinChkName(un, unlen, wep, chksum, u2w_loaded, u2w, ul_loaded, ul) 75433548Sjkh const u_char *un; 75533548Sjkh int unlen; 75633548Sjkh struct winentry *wep; 75733548Sjkh int chksum; 75833768Sache int u2w_loaded; 75933750Sache u_int16_t *u2w; 76033791Sache int ul_loaded; 76133791Sache u_int8_t *ul; 76233548Sjkh{ 76333548Sjkh u_int8_t *cp; 76433548Sjkh int i; 76533750Sache u_int16_t code; 76633760Sache u_int8_t c1, c2; 76733548Sjkh 76833548Sjkh /* 76933548Sjkh * First compare checksums 77033548Sjkh */ 77133548Sjkh if (wep->weCnt&WIN_LAST) 77233548Sjkh chksum = wep->weChksum; 77333548Sjkh else if (chksum != wep->weChksum) 77433548Sjkh chksum = -1; 77533548Sjkh if (chksum == -1) 77633548Sjkh return -1; 77733548Sjkh 77833548Sjkh /* 77933548Sjkh * Offset of this entry 78033548Sjkh */ 78133548Sjkh i = ((wep->weCnt&WIN_CNT) - 1) * WIN_CHARS; 78233548Sjkh un += i; 78333548Sjkh if ((unlen -= i) <= 0) 78433548Sjkh return -1; 78533548Sjkh if ((wep->weCnt&WIN_LAST) && unlen > WIN_CHARS) 78633548Sjkh return -1; 78733548Sjkh 78833548Sjkh /* 78933548Sjkh * Compare the name parts 79033548Sjkh */ 79133548Sjkh for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) { 79233548Sjkh if (--unlen < 0) { 79333548Sjkh if (!*cp++ && !*cp) 79433548Sjkh return chksum; 79533548Sjkh return -1; 79633548Sjkh } 79733750Sache code = (cp[1] << 8) | cp[0]; 79833750Sache if (code & 0xff80) { 79933760Sache if (u2w_loaded) 80033750Sache code = find_lcode(code, u2w); 80133750Sache else if (code & 0xff00) 80233750Sache code = '?'; 80333750Sache } 80433791Sache c1 = ul_loaded && (code & 0x80) ? 80533791Sache ul[code & 0x7f] : u2l[code]; 80633791Sache c2 = ul_loaded && (*un & 0x80) ? 80733791Sache ul[*un & 0x7f] : u2l[*un]; 80833760Sache if (c1 != c2) 80933548Sjkh return -1; 81033750Sache cp += 2; 81133760Sache un++; 81233548Sjkh } 81333548Sjkh for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) { 81433548Sjkh if (--unlen < 0) { 81533548Sjkh if (!*cp++ && !*cp) 81633548Sjkh return chksum; 81733548Sjkh return -1; 81833548Sjkh } 81933750Sache code = (cp[1] << 8) | cp[0]; 82033750Sache if (code & 0xff80) { 82133760Sache if (u2w_loaded) 82233750Sache code = find_lcode(code, u2w); 82333750Sache else if (code & 0xff00) 82433750Sache code = '?'; 82533750Sache } 82633791Sache c1 = ul_loaded && (code & 0x80) ? 82733791Sache ul[code & 0x7f] : u2l[code]; 82833791Sache c2 = ul_loaded && (*un & 0x80) ? 82933791Sache ul[*un & 0x7f] : u2l[*un]; 83033760Sache if (c1 != c2) 83133548Sjkh return -1; 83233750Sache cp += 2; 83333760Sache un++; 83433548Sjkh } 83533548Sjkh for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) { 83633548Sjkh if (--unlen < 0) { 83733548Sjkh if (!*cp++ && !*cp) 83833548Sjkh return chksum; 83933548Sjkh return -1; 84033548Sjkh } 84133750Sache code = (cp[1] << 8) | cp[0]; 84233750Sache if (code & 0xff80) { 84333760Sache if (u2w_loaded) 84433750Sache code = find_lcode(code, u2w); 84533750Sache else if (code & 0xff00) 84633750Sache code = '?'; 84733750Sache } 84833791Sache c1 = ul_loaded && (code & 0x80) ? 84933791Sache ul[code & 0x7f] : u2l[code]; 85033791Sache c2 = ul_loaded && (*un & 0x80) ? 85133791Sache ul[*un & 0x7f] : u2l[*un]; 85233760Sache if (c1 != c2) 85333548Sjkh return -1; 85433750Sache cp += 2; 85533760Sache un++; 85633548Sjkh } 85733548Sjkh return chksum; 85833548Sjkh} 85933548Sjkh 86033548Sjkh/* 86133548Sjkh * Convert Win95 filename to dirbuf. 86233548Sjkh * Returns the checksum or -1 if impossible 86333548Sjkh */ 86433548Sjkhint 86533768Sachewin2unixfn(wep, dp, chksum, table_loaded, u2w) 86633548Sjkh struct winentry *wep; 86733548Sjkh struct dirent *dp; 86833548Sjkh int chksum; 86933768Sache int table_loaded; 87033747Sache u_int16_t *u2w; 87133548Sjkh{ 87233548Sjkh u_int8_t *cp; 87333548Sjkh u_int8_t *np, *ep = dp->d_name + WIN_MAXLEN; 87433744Sache u_int16_t code; 87533548Sjkh int i; 87633548Sjkh 87733548Sjkh if ((wep->weCnt&WIN_CNT) > howmany(WIN_MAXLEN, WIN_CHARS) 87833548Sjkh || !(wep->weCnt&WIN_CNT)) 87933548Sjkh return -1; 88033548Sjkh 88133548Sjkh /* 88233548Sjkh * First compare checksums 88333548Sjkh */ 88433548Sjkh if (wep->weCnt&WIN_LAST) { 88533548Sjkh chksum = wep->weChksum; 88633548Sjkh /* 88733548Sjkh * This works even though d_namlen is one byte! 88833548Sjkh */ 88933548Sjkh dp->d_namlen = (wep->weCnt&WIN_CNT) * WIN_CHARS; 89033548Sjkh } else if (chksum != wep->weChksum) 89133548Sjkh chksum = -1; 89233548Sjkh if (chksum == -1) 89333548Sjkh return -1; 89433548Sjkh 89533548Sjkh /* 89633548Sjkh * Offset of this entry 89733548Sjkh */ 89833548Sjkh i = ((wep->weCnt&WIN_CNT) - 1) * WIN_CHARS; 89933548Sjkh np = (u_int8_t *)dp->d_name + i; 90033548Sjkh 90133548Sjkh /* 90233548Sjkh * Convert the name parts 90333548Sjkh */ 90433548Sjkh for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) { 90533744Sache code = (cp[1] << 8) | cp[0]; 90633744Sache switch (code) { 90733548Sjkh case 0: 90833744Sache *np = '\0'; 90933548Sjkh dp->d_namlen -= sizeof(wep->wePart2)/2 91033548Sjkh + sizeof(wep->wePart3)/2 + i + 1; 91133548Sjkh return chksum; 91233548Sjkh case '/': 91333744Sache *np = '\0'; 91433548Sjkh return -1; 91533744Sache default: 91633747Sache if (code & 0xff80) { 91733747Sache if (table_loaded) 91833747Sache code = find_lcode(code, u2w); 91933747Sache else if (code & 0xff00) 92033745Sache code = '?'; 92133744Sache } 92233744Sache *np++ = code; 92333744Sache break; 92433548Sjkh } 92533548Sjkh /* 92633548Sjkh * The size comparison should result in the compiler 92733548Sjkh * optimizing the whole if away 92833548Sjkh */ 92933548Sjkh if (WIN_MAXLEN % WIN_CHARS < sizeof(wep->wePart1) / 2 93033548Sjkh && np > ep) { 93133548Sjkh np[-1] = 0; 93233548Sjkh return -1; 93333548Sjkh } 93433744Sache cp += 2; 93533548Sjkh } 93633548Sjkh for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) { 93733744Sache code = (cp[1] << 8) | cp[0]; 93833744Sache switch (code) { 93933548Sjkh case 0: 94033744Sache *np = '\0'; 94133548Sjkh dp->d_namlen -= sizeof(wep->wePart3)/2 + i + 1; 94233548Sjkh return chksum; 94333548Sjkh case '/': 94433744Sache *np = '\0'; 94533548Sjkh return -1; 94633744Sache default: 94733747Sache if (code & 0xff80) { 94833747Sache if (table_loaded) 94933747Sache code = find_lcode(code, u2w); 95033747Sache else if (code & 0xff00) 95133745Sache code = '?'; 95233744Sache } 95333744Sache *np++ = code; 95433744Sache break; 95533548Sjkh } 95633548Sjkh /* 95733548Sjkh * The size comparisons should be optimized away 95833548Sjkh */ 95933548Sjkh if (WIN_MAXLEN % WIN_CHARS >= sizeof(wep->wePart1) / 2 96033548Sjkh && WIN_MAXLEN % WIN_CHARS < (sizeof(wep->wePart1) + sizeof(wep->wePart2)) / 2 96133548Sjkh && np > ep) { 96233548Sjkh np[-1] = 0; 96333548Sjkh return -1; 96433548Sjkh } 96533744Sache cp += 2; 96633548Sjkh } 96733548Sjkh for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) { 96833744Sache code = (cp[1] << 8) | cp[0]; 96933744Sache switch (code) { 97033548Sjkh case 0: 97133744Sache *np = '\0'; 97233548Sjkh dp->d_namlen -= i + 1; 97333548Sjkh return chksum; 97433548Sjkh case '/': 97533744Sache *np = '\0'; 97633548Sjkh return -1; 97733744Sache default: 97833747Sache if (code & 0xff80) { 97933747Sache if (table_loaded) 98033747Sache code = find_lcode(code, u2w); 98133747Sache else if (code & 0xff00) 98233745Sache code = '?'; 98333744Sache } 98433744Sache *np++ = code; 98533744Sache break; 98633548Sjkh } 98733548Sjkh /* 98833548Sjkh * See above 98933548Sjkh */ 99033548Sjkh if (WIN_MAXLEN % WIN_CHARS >= (sizeof(wep->wePart1) + sizeof(wep->wePart2)) / 2 99133548Sjkh && np > ep) { 99233548Sjkh np[-1] = 0; 99333548Sjkh return -1; 99433548Sjkh } 99533744Sache cp += 2; 99633548Sjkh } 99733548Sjkh return chksum; 99833548Sjkh} 99933548Sjkh 100033548Sjkh/* 100133548Sjkh * Compute the checksum of a DOS filename for Win95 use 100233548Sjkh */ 100333548Sjkhu_int8_t 100433548SjkhwinChksum(name) 100533548Sjkh u_int8_t *name; 100633548Sjkh{ 100733548Sjkh int i; 100833548Sjkh u_int8_t s; 100933548Sjkh 101033548Sjkh for (s = 0, i = 11; --i >= 0; s += *name++) 101133548Sjkh s = (s << 7)|(s >> 1); 101233548Sjkh return s; 101333548Sjkh} 101433548Sjkh 101533548Sjkh/* 101633548Sjkh * Determine the number of slots necessary for Win95 names 101733548Sjkh */ 101833548Sjkhint 101933548SjkhwinSlotCnt(un, unlen) 102033548Sjkh const u_char *un; 102133548Sjkh int unlen; 102233548Sjkh{ 102333848Smsmith unlen = winLenFixup(un, unlen); 102433548Sjkh if (unlen > WIN_MAXLEN) 102533548Sjkh return 0; 102633548Sjkh return howmany(unlen, WIN_CHARS); 102733548Sjkh} 102833848Smsmith 102933848Smsmith/* 103033848Smsmith * Determine the number of bytes neccesary for Win95 names 103133848Smsmith */ 103233848Smsmithint 103333848SmsmithwinLenFixup(un, unlen) 103433848Smsmith const u_char* un; 103533848Smsmith int unlen; 103633848Smsmith{ 103733848Smsmith for (un += unlen; unlen > 0; unlen--) 103833848Smsmith if (*--un != ' ' && *un != '.') 103933848Smsmith break; 104033848Smsmith return unlen; 104133848Smsmith} 1042