msdosfs_conv.c revision 33744
1/* $Id: msdosfs_conv.c,v 1.15 1998/02/18 09:28:31 jkh Exp $ */ 2/* $NetBSD: msdosfs_conv.c,v 1.25 1997/11/17 15:36:40 ws Exp $ */ 3 4/*- 5 * Copyright (C) 1995, 1997 Wolfgang Solfrank. 6 * Copyright (C) 1995, 1997 TooLs GmbH. 7 * All rights reserved. 8 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 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. 23 * 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. 34 */ 35/* 36 * Written by Paul Popelka (paulp@uts.amdahl.com) 37 * 38 * You can do anything you want with this software, just don't say you wrote 39 * it, and don't remove this notice. 40 * 41 * This software is provided "as is". 42 * 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. 47 * 48 * October 1992 49 */ 50 51/* 52 * System include files. 53 */ 54#include <sys/param.h> 55#include <sys/time.h> 56#include <sys/kernel.h> /* defines tz */ 57#include <sys/systm.h> 58#include <machine/clock.h> 59#include <sys/dirent.h> 60 61/* 62 * MSDOSFS include files. 63 */ 64#include <msdosfs/direntry.h> 65 66/* 67 * Total number of days that have passed for each month in a regular year. 68 */ 69static u_short regyear[] = { 70 31, 59, 90, 120, 151, 181, 71 212, 243, 273, 304, 334, 365 72}; 73 74/* 75 * Total number of days that have passed for each month in a leap year. 76 */ 77static u_short leapyear[] = { 78 31, 60, 91, 121, 152, 182, 79 213, 244, 274, 305, 335, 366 80}; 81 82/* 83 * Variables used to remember parts of the last time conversion. Maybe we 84 * can avoid a full conversion. 85 */ 86static u_long lasttime; 87static u_long lastday; 88static u_short lastddate; 89static u_short lastdtime; 90 91/* 92 * Convert the unix version of time to dos's idea of time to be used in 93 * file timestamps. The passed in unix time is assumed to be in GMT. 94 */ 95void 96unix2dostime(tsp, ddp, dtp, dhp) 97 struct timespec *tsp; 98 u_int16_t *ddp; 99 u_int16_t *dtp; 100 u_int8_t *dhp; 101{ 102 u_long t; 103 u_long days; 104 u_long inc; 105 u_long year; 106 u_long month; 107 u_short *months; 108 109 /* 110 * If the time from the last conversion is the same as now, then 111 * skip the computations and use the saved result. 112 */ 113 t = tsp->tv_sec - (tz.tz_minuteswest * 60) 114 - (wall_cmos_clock ? adjkerntz : 0); 115 /* - daylight savings time correction */ 116 t &= ~1; 117 if (lasttime != t) { 118 lasttime = t; 119 lastdtime = (((t / 2) % 30) << DT_2SECONDS_SHIFT) 120 + (((t / 60) % 60) << DT_MINUTES_SHIFT) 121 + (((t / 3600) % 24) << DT_HOURS_SHIFT); 122 123 /* 124 * If the number of days since 1970 is the same as the last 125 * time we did the computation then skip all this leap year 126 * and month stuff. 127 */ 128 days = t / (24 * 60 * 60); 129 if (days != lastday) { 130 lastday = days; 131 for (year = 1970;; year++) { 132 inc = year & 0x03 ? 365 : 366; 133 if (days < inc) 134 break; 135 days -= inc; 136 } 137 months = year & 0x03 ? regyear : leapyear; 138 for (month = 0; days >= months[month]; month++) 139 ; 140 if (month > 0) 141 days -= months[month - 1]; 142 lastddate = ((days + 1) << DD_DAY_SHIFT) 143 + ((month + 1) << DD_MONTH_SHIFT); 144 /* 145 * Remember dos's idea of time is relative to 1980. 146 * unix's is relative to 1970. If somehow we get a 147 * time before 1980 then don't give totally crazy 148 * results. 149 */ 150 if (year > 1980) 151 lastddate += (year - 1980) << DD_YEAR_SHIFT; 152 } 153 } 154 if (dtp) 155 *dtp = lastdtime; 156 if (dhp) 157 *dhp = (tsp->tv_sec & 1) * 100 + tsp->tv_nsec / 10000000; 158 159 *ddp = lastddate; 160} 161 162/* 163 * The number of seconds between Jan 1, 1970 and Jan 1, 1980. In that 164 * interval there were 8 regular years and 2 leap years. 165 */ 166#define SECONDSTO1980 (((8 * 365) + (2 * 366)) * (24 * 60 * 60)) 167 168static u_short lastdosdate; 169static u_long lastseconds; 170 171/* 172 * Convert from dos' idea of time to unix'. This will probably only be 173 * called from the stat(), and fstat() system calls and so probably need 174 * not be too efficient. 175 */ 176void 177dos2unixtime(dd, dt, dh, tsp) 178 u_int dd; 179 u_int dt; 180 u_int dh; 181 struct timespec *tsp; 182{ 183 u_long seconds; 184 u_long month; 185 u_long year; 186 u_long days; 187 u_short *months; 188 189 if (dd == 0) { 190 /* 191 * Uninitialized field, return the epoch. 192 */ 193 tsp->tv_sec = 0; 194 tsp->tv_nsec = 0; 195 return; 196 } 197 seconds = (((dt & DT_2SECONDS_MASK) >> DT_2SECONDS_SHIFT) << 1) 198 + ((dt & DT_MINUTES_MASK) >> DT_MINUTES_SHIFT) * 60 199 + ((dt & DT_HOURS_MASK) >> DT_HOURS_SHIFT) * 3600 200 + dh / 100; 201 /* 202 * If the year, month, and day from the last conversion are the 203 * same then use the saved value. 204 */ 205 if (lastdosdate != dd) { 206 lastdosdate = dd; 207 days = 0; 208 year = (dd & DD_YEAR_MASK) >> DD_YEAR_SHIFT; 209 days = year * 365; 210 days += year / 4 + 1; /* add in leap days */ 211 if ((year & 0x03) == 0) 212 days--; /* if year is a leap year */ 213 months = year & 0x03 ? regyear : leapyear; 214 month = (dd & DD_MONTH_MASK) >> DD_MONTH_SHIFT; 215 if (month < 1 || month > 12) { 216 printf("dos2unixtime(): month value out of range (%ld)\n", 217 month); 218 month = 1; 219 } 220 if (month > 1) 221 days += months[month - 2]; 222 days += ((dd & DD_DAY_MASK) >> DD_DAY_SHIFT) - 1; 223 lastseconds = (days * 24 * 60 * 60) + SECONDSTO1980; 224 } 225 tsp->tv_sec = seconds + lastseconds + (tz.tz_minuteswest * 60) 226 + adjkerntz; 227 /* + daylight savings time correction */ 228 tsp->tv_nsec = (dh % 100) * 10000000; 229} 230 231static u_char 232unix2dos[256] = { 233 0, 0, 0, 0, 0, 0, 0, 0, /* 00-07 */ 234 0, 0, 0, 0, 0, 0, 0, 0, /* 08-0f */ 235 0, 0, 0, 0, 0, 0, 0, 0, /* 10-17 */ 236 0, 0, 0, 0, 0, 0, 0, 0, /* 18-1f */ 237 0, 0x21, 0, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */ 238 0x28, 0x29, 0, 0, 0, 0x2d, 0, 0, /* 28-2f */ 239 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */ 240 0x38, 0x39, 0, 0, 0, 0, 0, 0, /* 38-3f */ 241 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */ 242 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */ 243 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */ 244 0x58, 0x59, 0x5a, 0, 0, 0, 0x5e, 0x5f, /* 58-5f */ 245 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 60-67 */ 246 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 68-6f */ 247 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 70-77 */ 248 0x58, 0x59, 0x5a, 0x7b, 0, 0x7d, 0x7e, 0, /* 78-7f */ 249 0, 0, 0, 0, 0, 0, 0, 0, /* 80-87 */ 250 0, 0, 0, 0, 0, 0, 0, 0, /* 88-8f */ 251 0, 0, 0, 0, 0, 0, 0, 0, /* 90-97 */ 252 0, 0, 0, 0, 0, 0, 0, 0, /* 98-9f */ 253 0, 0xad, 0xbd, 0x9c, 0xcf, 0xbe, 0xdd, 0xf5, /* a0-a7 */ 254 0xf9, 0xb8, 0xa6, 0xae, 0xaa, 0xf0, 0xa9, 0xee, /* a8-af */ 255 0xf8, 0xf1, 0xfd, 0xfc, 0xef, 0xe6, 0xf4, 0xfa, /* b0-b7 */ 256 0xf7, 0xfb, 0xa7, 0xaf, 0xac, 0xab, 0xf3, 0xa8, /* b8-bf */ 257 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* c0-c7 */ 258 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* c8-cf */ 259 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0x9e, /* d0-d7 */ 260 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0xe1, /* d8-df */ 261 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* e0-e7 */ 262 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* e8-ef */ 263 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0xf6, /* f0-f7 */ 264 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0x98, /* f8-ff */ 265}; 266 267static u_char 268dos2unix[256] = { 269 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 00-07 */ 270 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 08-0f */ 271 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 10-17 */ 272 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 18-1f */ 273 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */ 274 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */ 275 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */ 276 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */ 277 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */ 278 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */ 279 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */ 280 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */ 281 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */ 282 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */ 283 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */ 284 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */ 285 0xc7, 0xfc, 0xe9, 0xe2, 0xe4, 0xe0, 0xe5, 0xe7, /* 80-87 */ 286 0xea, 0xeb, 0xe8, 0xef, 0xee, 0xec, 0xc4, 0xc5, /* 88-8f */ 287 0xc9, 0xe6, 0xc6, 0xf4, 0xf6, 0xf2, 0xfb, 0xf9, /* 90-97 */ 288 0xff, 0xd6, 0xdc, 0xf8, 0xa3, 0xd8, 0xd7, 0x3f, /* 98-9f */ 289 0xe1, 0xed, 0xf3, 0xfa, 0xf1, 0xd1, 0xaa, 0xba, /* a0-a7 */ 290 0xbf, 0xae, 0xac, 0xbd, 0xbc, 0xa1, 0xab, 0xbb, /* a8-af */ 291 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xc1, 0xc2, 0xc0, /* b0-b7 */ 292 0xa9, 0x3f, 0x3f, 0x3f, 0x3f, 0xa2, 0xa5, 0x3f, /* b8-bf */ 293 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xe3, 0xc3, /* c0-c7 */ 294 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xa4, /* c8-cf */ 295 0xf0, 0xd0, 0xca, 0xcb, 0xc8, 0x3f, 0xcd, 0xce, /* d0-d7 */ 296 0xcf, 0x3f, 0x3f, 0x3f, 0x3f, 0xa6, 0xcc, 0x3f, /* d8-df */ 297 0xd3, 0xdf, 0xd4, 0xd2, 0xf5, 0xd5, 0xb5, 0xfe, /* e0-e7 */ 298 0xde, 0xda, 0xdb, 0xd9, 0xfd, 0xdd, 0xaf, 0x3f, /* e8-ef */ 299 0xad, 0xb1, 0x3f, 0xbe, 0xb6, 0xa7, 0xf7, 0xb8, /* f0-f7 */ 300 0xb0, 0xa8, 0xb7, 0xb9, 0xb3, 0xb2, 0x3f, 0x3f, /* f8-ff */ 301}; 302 303static u_char 304u2l[256] = { 305 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */ 306 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */ 307 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */ 308 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */ 309 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */ 310 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */ 311 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */ 312 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */ 313 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */ 314 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */ 315 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */ 316 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */ 317 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */ 318 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */ 319 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */ 320 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */ 321 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */ 322 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */ 323 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */ 324 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */ 325 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */ 326 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */ 327 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */ 328 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */ 329 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */ 330 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */ 331 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */ 332 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */ 333 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */ 334 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */ 335 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */ 336 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */ 337}; 338 339/* UNICODE Cyrillic to local code table conversion */ 340/* will be loadable in future */ 341 342static u_char 343cyr2u[256] = { /* defaulted to KOI8-R */ 3440x00, /* */ 3450xb3, /* CYRILLIC CAPITAL LETTER IO */ 3460x00, /* CYRILLIC CAPITAL LETTER DJE */ 3470x00, /* CYRILLIC CAPITAL LETTER GJE */ 3480x00, /* CYRILLIC CAPITAL LETTER UKRAINIAN IE */ 3490x00, /* CYRILLIC CAPITAL LETTER DZE */ 3500x00, /* CYRILLIC CAPITAL LETTER BYELORUSSIAN-UKRAINIAN I */ 3510x00, /* CYRILLIC CAPITAL LETTER YI */ 3520x00, /* CYRILLIC CAPITAL LETTER JE */ 3530x00, /* CYRILLIC CAPITAL LETTER LJE */ 3540x00, /* CYRILLIC CAPITAL LETTER NJE */ 3550x00, /* CYRILLIC CAPITAL LETTER TSHE */ 3560x00, /* CYRILLIC CAPITAL LETTER KJE */ 3570x00, /* */ 3580x00, /* CYRILLIC CAPITAL LETTER SHORT U */ 3590x00, /* CYRILLIC CAPITAL LETTER DZHE */ 3600xe1, /* CYRILLIC CAPITAL LETTER A */ 3610xe2, /* CYRILLIC CAPITAL LETTER BE */ 3620xf7, /* CYRILLIC CAPITAL LETTER VE */ 3630xe7, /* CYRILLIC CAPITAL LETTER GHE */ 3640xe4, /* CYRILLIC CAPITAL LETTER DE */ 3650xe5, /* CYRILLIC CAPITAL LETTER IE */ 3660xf6, /* CYRILLIC CAPITAL LETTER ZHE */ 3670xfa, /* CYRILLIC CAPITAL LETTER ZE */ 3680xe9, /* CYRILLIC CAPITAL LETTER I */ 3690xea, /* CYRILLIC CAPITAL LETTER SHORT I */ 3700xeb, /* CYRILLIC CAPITAL LETTER KA */ 3710xe4, /* CYRILLIC CAPITAL LETTER EL */ 3720xed, /* CYRILLIC CAPITAL LETTER EM */ 3730xee, /* CYRILLIC CAPITAL LETTER EN */ 3740xef, /* CYRILLIC CAPITAL LETTER O */ 3750xf0, /* CYRILLIC CAPITAL LETTER PE */ 3760xf2, /* CYRILLIC CAPITAL LETTER ER */ 3770xf3, /* CYRILLIC CAPITAL LETTER ES */ 3780xf4, /* CYRILLIC CAPITAL LETTER TE */ 3790xf5, /* CYRILLIC CAPITAL LETTER U */ 3800xe6, /* CYRILLIC CAPITAL LETTER EF */ 3810xe8, /* CYRILLIC CAPITAL LETTER HA */ 3820xe3, /* CYRILLIC CAPITAL LETTER TSE */ 3830xfe, /* CYRILLIC CAPITAL LETTER CHE */ 3840xfb, /* CYRILLIC CAPITAL LETTER SHA */ 3850xfd, /* CYRILLIC CAPITAL LETTER SHCHA */ 3860xff, /* CYRILLIC CAPITAL LETTER HARD SIGN */ 3870xf9, /* CYRILLIC CAPITAL LETTER YERU */ 3880xf8, /* CYRILLIC CAPITAL LETTER SOFT SIGN */ 3890xfc, /* CYRILLIC CAPITAL LETTER E */ 3900xe0, /* CYRILLIC CAPITAL LETTER YU */ 3910xf1, /* CYRILLIC CAPITAL LETTER YA */ 3920xc1, /* CYRILLIC SMALL LETTER A */ 3930xc2, /* CYRILLIC SMALL LETTER BE */ 3940xd7, /* CYRILLIC SMALL LETTER VE */ 3950xc7, /* CYRILLIC SMALL LETTER GHE */ 3960xc4, /* CYRILLIC SMALL LETTER DE */ 3970xc5, /* CYRILLIC SMALL LETTER IE */ 3980xd6, /* CYRILLIC SMALL LETTER ZHE */ 3990xda, /* CYRILLIC SMALL LETTER ZE */ 4000xc9, /* CYRILLIC SMALL LETTER I */ 4010xca, /* CYRILLIC SMALL LETTER SHORT I */ 4020xcb, /* CYRILLIC SMALL LETTER KA */ 4030xcc, /* CYRILLIC SMALL LETTER EL */ 4040xcd, /* CYRILLIC SMALL LETTER EM */ 4050xce, /* CYRILLIC SMALL LETTER EN */ 4060xcf, /* CYRILLIC SMALL LETTER O */ 4070xd0, /* CYRILLIC SMALL LETTER PE */ 4080xd2, /* CYRILLIC SMALL LETTER ER */ 4090xd3, /* CYRILLIC SMALL LETTER ES */ 4100xd4, /* CYRILLIC SMALL LETTER TE */ 4110xd5, /* CYRILLIC SMALL LETTER U */ 4120xc6, /* CYRILLIC SMALL LETTER EF */ 4130xc8, /* CYRILLIC SMALL LETTER HA */ 4140xc3, /* CYRILLIC SMALL LETTER TSE */ 4150xde, /* CYRILLIC SMALL LETTER CHE */ 4160xdb, /* CYRILLIC SMALL LETTER SHA */ 4170xdd, /* CYRILLIC SMALL LETTER SHCHA */ 4180xdf, /* CYRILLIC SMALL LETTER HARD SIGN */ 4190xd9, /* CYRILLIC SMALL LETTER YERU */ 4200xd8, /* CYRILLIC SMALL LETTER SOFT SIGN */ 4210xdc, /* CYRILLIC SMALL LETTER E */ 4220xc0, /* CYRILLIC SMALL LETTER YU */ 4230xd1, /* CYRILLIC SMALL LETTER YA */ 4240x00, /* */ 4250xa3, /* CYRILLIC SMALL LETTER IO */ 4260x00, /* CYRILLIC SMALL LETTER DJE */ 4270x00, /* CYRILLIC SMALL LETTER GJE */ 4280x00, /* CYRILLIC SMALL LETTER UKRAINIAN IE */ 4290x00, /* CYRILLIC SMALL LETTER DZE */ 4300x00, /* CYRILLIC SMALL LETTER BYELORUSSIAN-UKRAINIAN I */ 4310x00, /* CYRILLIC SMALL LETTER YI */ 4320x00, /* CYRILLIC SMALL LETTER JE */ 4330x00, /* CYRILLIC SMALL LETTER LJE */ 4340x00, /* CYRILLIC SMALL LETTER NJE */ 4350x00, /* CYRILLIC SMALL LETTER TSHE */ 4360x00, /* CYRILLIC SMALL LETTER KJE */ 4370x00, /* */ 4380x00, /* CYRILLIC SMALL LETTER SHORT U */ 4390x00, /* CYRILLIC SMALL LETTER DZHE */ 4400x00, /* CYRILLIC CAPITAL LETTER OMEGA */ 4410x00, /* CYRILLIC SMALL LETTER OMEGA */ 4420x00, /* CYRILLIC CAPITAL LETTER YAT */ 4430x00, /* CYRILLIC SMALL LETTER YAT */ 4440x00, /* CYRILLIC CAPITAL LETTER IOTIFIED E */ 4450x00, /* CYRILLIC SMALL LETTER IOTIFIED E */ 4460x00, /* CYRILLIC CAPITAL LETTER LITTLE YUS */ 4470x00, /* CYRILLIC SMALL LETTER LITTLE YUS */ 4480x00, /* CYRILLIC CAPITAL LETTER IOTIFIED LITTLE YUS */ 4490x00, /* CYRILLIC SMALL LETTER IOTIFIED LITTLE YUS */ 4500x00, /* CYRILLIC CAPITAL LETTER BIG YUS */ 4510x00, /* CYRILLIC SMALL LETTER BIG YUS */ 4520x00, /* CYRILLIC CAPITAL LETTER IOTIFIED BIG YUS */ 4530x00, /* CYRILLIC SMALL LETTER IOTIFIED BIG YUS */ 4540x00, /* CYRILLIC CAPITAL LETTER KSI */ 4550x00, /* CYRILLIC SMALL LETTER KSI */ 4560x00, /* CYRILLIC CAPITAL LETTER PSI */ 4570x00, /* CYRILLIC SMALL LETTER PSI */ 4580x00, /* CYRILLIC CAPITAL LETTER FITA */ 4590x00, /* CYRILLIC SMALL LETTER FITA */ 4600x00, /* CYRILLIC CAPITAL LETTER IZHITSA */ 4610x00, /* CYRILLIC SMALL LETTER IZHITSA */ 4620x00, /* CYRILLIC CAPITAL LETTER IZHITSA WITH DOUBLE GRAVE ACCENT */ 4630x00, /* CYRILLIC SMALL LETTER IZHITSA WITH DOUBLE GRAVE ACCENT */ 4640x00, /* CYRILLIC CAPITAL LETTER UK */ 4650x00, /* CYRILLIC SMALL LETTER UK */ 4660x00, /* CYRILLIC CAPITAL LETTER ROUND OMEGA */ 4670x00, /* CYRILLIC SMALL LETTER ROUND OMEGA */ 4680x00, /* CYRILLIC CAPITAL LETTER OMEGA WITH TITLO */ 4690x00, /* CYRILLIC SMALL LETTER OMEGA WITH TITLO */ 4700x00, /* CYRILLIC CAPITAL LETTER OT */ 4710x00, /* CYRILLIC SMALL LETTER OT */ 4720x00, /* CYRILLIC CAPITAL LETTER KOPPA */ 4730x00, /* CYRILLIC SMALL LETTER KOPPA */ 4740x00, /* CYRILLIC THOUSANDS SIGN */ 4750x00, /* */ 4760x00, /* */ 4770x00, /* */ 4780x00, /* */ 4790x00, /* */ 4800x00, /* */ 4810x00, /* */ 4820x00, /* */ 4830x00, /* */ 4840x00, /* */ 4850x00, /* */ 4860x00, /* */ 4870x00, /* */ 4880x00, /* CYRILLIC CAPITAL LETTER GHE WITH UPTURN */ 4890x00, /* CYRILLIC SMALL LETTER GHE WITH UPTURN */ 4900x00, /* CYRILLIC CAPITAL LETTER GHE WITH STROKE */ 4910x00, /* CYRILLIC SMALL LETTER GHE WITH STROKE */ 4920x00, /* CYRILLIC CAPITAL LETTER GHE WITH MIDDLE HOOK */ 4930x00, /* CYRILLIC SMALL LETTER GHE WITH MIDDLE HOOK */ 4940x00, /* CYRILLIC CAPITAL LETTER ZHE WITH DESCENDER */ 4950x00, /* CYRILLIC SMALL LETTER ZHE WITH DESCENDER */ 4960x00, /* CYRILLIC CAPITAL LETTER ZE WITH DESCENDER */ 4970x00, /* CYRILLIC SMALL LETTER ZE WITH DESCENDER */ 4980x00, /* CYRILLIC CAPITAL LETTER KA WITH DESCENDER */ 4990x00, /* CYRILLIC SMALL LETTER KA WITH DESCENDER */ 5000x00, /* CYRILLIC CAPITAL LETTER KA WITH VERTICAL STROKE */ 5010x00, /* CYRILLIC SMALL LETTER KA WITH VERTICAL STROKE */ 5020x00, /* CYRILLIC CAPITAL LETTER KA WITH STROKE */ 5030x00, /* CYRILLIC SMALL LETTER KA WITH STROKE */ 5040x00, /* CYRILLIC CAPITAL LETTER BASHKIR KA */ 5050x00, /* CYRILLIC SMALL LETTER BASHKIR KA */ 5060x00, /* CYRILLIC CAPITAL LETTER EN WITH DESCENDER */ 5070x00, /* CYRILLIC SMALL LETTER EN WITH DESCENDER */ 5080x00, /* CYRILLIC CAPITAL LIGATURE EN GHE */ 5090x00, /* CYRILLIC SMALL LIGATURE EN GHE */ 5100x00, /* CYRILLIC CAPITAL LETTER PE WITH MIDDLE HOOK */ 5110x00, /* CYRILLIC SMALL LETTER PE WITH MIDDLE HOOK */ 5120x00, /* CYRILLIC CAPITAL LETTER ABKHASIAN HA */ 5130x00, /* CYRILLIC SMALL LETTER ABKHASIAN HA */ 5140x00, /* CYRILLIC CAPITAL LETTER ES WITH DESCENDER */ 5150x00, /* CYRILLIC SMALL LETTER ES WITH DESCENDER */ 5160x00, /* CYRILLIC CAPITAL LETTER TE WITH DESCENDER */ 5170x00, /* CYRILLIC SMALL LETTER TE WITH DESCENDER */ 5180x00, /* CYRILLIC CAPITAL LETTER STRAIGHT U */ 5190x00, /* CYRILLIC SMALL LETTER STRAIGHT U */ 5200x00, /* CYRILLIC CAPITAL LETTER STRAIGHT U WITH STROKE */ 5210x00, /* CYRILLIC SMALL LETTER STRAIGHT U WITH STROKE */ 5220x00, /* CYRILLIC CAPITAL LETTER HA WITH DESCENDER */ 5230x00, /* CYRILLIC SMALL LETTER HA WITH DESCENDER */ 5240x00, /* CYRILLIC CAPITAL LIGATURE TE TSE */ 5250x00, /* CYRILLIC SMALL LIGATURE TE TSE */ 5260x00, /* CYRILLIC CAPITAL LETTER CHE WITH DESCENDER */ 5270x00, /* CYRILLIC SMALL LETTER CHE WITH DESCENDER */ 5280x00, /* CYRILLIC CAPITAL LETTER CHE WITH VERTICAL STROKE */ 5290x00, /* CYRILLIC SMALL LETTER CHE WITH VERTICAL STROKE */ 5300x00, /* CYRILLIC CAPITAL LETTER SHHA */ 5310x00, /* CYRILLIC SMALL LETTER SHHA */ 5320x00, /* CYRILLIC CAPITAL LETTER ABKHASIAN CHE */ 5330x00, /* CYRILLIC SMALL LETTER ABKHASIAN CHE */ 5340x00, /* CYRILLIC CAPITAL LETTER ABKHASIAN CHE WITH DESCENDER */ 5350x00, /* CYRILLIC SMALL LETTER ABKHASIAN CHE WITH DESCENDER */ 5360x00, /* CYRILLIC LETTER PALOCHKA */ 5370x00, /* CYRILLIC CAPITAL LETTER ZHE WITH BREVE */ 5380x00, /* CYRILLIC SMALL LETTER ZHE WITH BREVE */ 5390x00, /* CYRILLIC CAPITAL LETTER KA WITH HOOK */ 5400x00, /* CYRILLIC SMALL LETTER KA WITH HOOK */ 5410x00, /* */ 5420x00, /* */ 5430x00, /* CYRILLIC CAPITAL LETTER EN WITH HOOK */ 5440x00, /* CYRILLIC SMALL LETTER EN WITH HOOK */ 5450x00, /* */ 5460x00, /* */ 5470x00, /* CYRILLIC CAPITAL LETTER KHAKASSIAN CHE */ 5480x00, /* CYRILLIC SMALL LETTER KHAKASSIAN CHE */ 5490x00, /* */ 5500x00, /* */ 5510x00, /* */ 5520x00, /* CYRILLIC CAPITAL LETTER A WITH BREVE */ 5530x00, /* CYRILLIC SMALL LETTER A WITH BREVE */ 5540x00, /* CYRILLIC CAPITAL LETTER A WITH DIAERESIS */ 5550x00, /* CYRILLIC SMALL LETTER A WITH DIAERESIS */ 5560x00, /* CYRILLIC CAPITAL LIGATURE A IE */ 5570x00, /* CYRILLIC SMALL LIGATURE A IE */ 5580x00, /* CYRILLIC CAPITAL LETTER IE WITH BREVE */ 5590x00, /* CYRILLIC SMALL LETTER IE WITH BREVE */ 5600x00, /* CYRILLIC CAPITAL LETTER SCHWA */ 5610x00, /* CYRILLIC SMALL LETTER SCHWA */ 5620x00, /* CYRILLIC CAPITAL LETTER SCHWA WITH DIAERESIS */ 5630x00, /* CYRILLIC SMALL LETTER SCHWA WITH DIAERESIS */ 5640x00, /* CYRILLIC CAPITAL LETTER ZHE WITH DIAERESIS */ 5650x00, /* CYRILLIC SMALL LETTER ZHE WITH DIAERESIS */ 5660x00, /* CYRILLIC CAPITAL LETTER ZE WITH DIAERESIS */ 5670x00, /* CYRILLIC SMALL LETTER ZE WITH DIAERESIS */ 5680x00, /* CYRILLIC CAPITAL LETTER ABKHASIAN DZE */ 5690x00, /* CYRILLIC SMALL LETTER ABKHASIAN DZE */ 5700x00, /* CYRILLIC CAPITAL LETTER I WITH MACRON */ 5710x00, /* CYRILLIC SMALL LETTER I WITH MACRON */ 5720x00, /* CYRILLIC CAPITAL LETTER I WITH DIAERESIS */ 5730x00, /* CYRILLIC SMALL LETTER I WITH DIAERESIS */ 5740x00, /* CYRILLIC CAPITAL LETTER O WITH DIAERESIS */ 5750x00, /* CYRILLIC SMALL LETTER O WITH DIAERESIS */ 5760x00, /* CYRILLIC CAPITAL LETTER BARRED O */ 5770x00, /* CYRILLIC SMALL LETTER BARRED O */ 5780x00, /* CYRILLIC CAPITAL LETTER BARRED O WITH DIAERESIS */ 5790x00, /* CYRILLIC SMALL LETTER BARRED O WITH DIAERESIS */ 5800x00, /* */ 5810x00, /* */ 5820x00, /* CYRILLIC CAPITAL LETTER U WITH MACRON */ 5830x00, /* CYRILLIC SMALL LETTER U WITH MACRON */ 5840x00, /* CYRILLIC CAPITAL LETTER U WITH DIAERESIS */ 5850x00, /* CYRILLIC SMALL LETTER U WITH DIAERESIS */ 5860x00, /* CYRILLIC CAPITAL LETTER U WITH DOUBLE ACUTE */ 5870x00, /* CYRILLIC SMALL LETTER U WITH DOUBLE ACUTE */ 5880x00, /* CYRILLIC CAPITAL LETTER CHE WITH DIAERESIS */ 5890x00, /* CYRILLIC SMALL LETTER CHE WITH DIAERESIS */ 5900x00, /* */ 5910x00, /* */ 5920x00, /* CYRILLIC CAPITAL LETTER YERU WITH DIAERESIS */ 5930x00, /* CYRILLIC SMALL LETTER YERU WITH DIAERESIS */ 5940x00, /* */ 5950x00, /* */ 5960x00, /* */ 5970x00, /* */ 5980x00, /* */ 5990x00 /* */ 600}; 601 602 603/* 604 * DOS filenames are made of 2 parts, the name part and the extension part. 605 * The name part is 8 characters long and the extension part is 3 606 * characters long. They may contain trailing blanks if the name or 607 * extension are not long enough to fill their respective fields. 608 */ 609 610/* 611 * Convert a DOS filename to a unix filename. And, return the number of 612 * characters in the resulting unix filename excluding the terminating 613 * null. 614 */ 615int 616dos2unixfn(dn, un, lower) 617 u_char dn[11]; 618 u_char *un; 619 int lower; 620{ 621 int i; 622 int thislong = 1; 623 u_char c; 624 625 /* 626 * If first char of the filename is SLOT_E5 (0x05), then the real 627 * first char of the filename should be 0xe5. But, they couldn't 628 * just have a 0xe5 mean 0xe5 because that is used to mean a freed 629 * directory slot. Another dos quirk. 630 */ 631 if (*dn == SLOT_E5) 632 c = dos2unix[0xe5]; 633 else 634 c = dos2unix[*dn]; 635 *un++ = lower ? u2l[c] : c; 636 dn++; 637 638 /* 639 * Copy the name portion into the unix filename string. 640 */ 641 for (i = 1; i < 8 && *dn != ' '; i++) { 642 c = dos2unix[*dn++]; 643 *un++ = lower ? u2l[c] : c; 644 thislong++; 645 } 646 dn += 8 - i; 647 648 /* 649 * Now, if there is an extension then put in a period and copy in 650 * the extension. 651 */ 652 if (*dn != ' ') { 653 *un++ = '.'; 654 thislong++; 655 for (i = 0; i < 3 && *dn != ' '; i++) { 656 c = dos2unix[*dn++]; 657 *un++ = lower ? u2l[c] : c; 658 thislong++; 659 } 660 } 661 *un++ = 0; 662 663 return (thislong); 664} 665 666/* 667 * Convert a unix filename to a DOS filename according to Win95 rules. 668 * If applicable and gen is not 0, it is inserted into the converted 669 * filename as a generation number. 670 * Returns 671 * 0 if name couldn't be converted 672 * 1 if the converted name is the same as the original 673 * (no long filename entry necessary for Win95) 674 * 2 if conversion was successful 675 * 3 if conversion was successful and generation number was inserted 676 */ 677int 678unix2dosfn(un, dn, unlen, gen) 679 const u_char *un; 680 u_char dn[12]; 681 int unlen; 682 u_int gen; 683{ 684 int i, j, l; 685 int conv = 1; 686 const u_char *cp, *dp, *dp1; 687 u_char gentext[6], *wcp; 688 689 /* 690 * Fill the dos filename string with blanks. These are DOS's pad 691 * characters. 692 */ 693 for (i = 0; i < 11; i++) 694 dn[i] = ' '; 695 dn[11] = 0; 696 697 /* 698 * The filenames "." and ".." are handled specially, since they 699 * don't follow dos filename rules. 700 */ 701 if (un[0] == '.' && unlen == 1) { 702 dn[0] = '.'; 703 return gen <= 1; 704 } 705 if (un[0] == '.' && un[1] == '.' && unlen == 2) { 706 dn[0] = '.'; 707 dn[1] = '.'; 708 return gen <= 1; 709 } 710 711 /* 712 * Filenames with only blanks and dots are not allowed! 713 */ 714 for (cp = un, i = unlen; --i >= 0; cp++) 715 if (*cp != ' ' && *cp != '.') 716 break; 717 if (i < 0) 718 return 0; 719 720 /* 721 * Now find the extension 722 * Note: dot as first char doesn't start extension 723 * and trailing dots and blanks are ignored 724 */ 725 dp = dp1 = 0; 726 for (cp = un + 1, i = unlen - 1; --i >= 0;) { 727 switch (*cp++) { 728 case '.': 729 if (!dp1) 730 dp1 = cp; 731 break; 732 case ' ': 733 break; 734 default: 735 if (dp1) 736 dp = dp1; 737 dp1 = 0; 738 break; 739 } 740 } 741 742 /* 743 * Now convert it 744 */ 745 if (dp) { 746 if (dp1) 747 l = dp1 - dp; 748 else 749 l = unlen - (dp - un); 750 for (i = 0, j = 8; i < l && j < 11; i++, j++) { 751 if (dp[i] != (dn[j] = unix2dos[dp[i]]) 752 && conv != 3) 753 conv = 2; 754 if (!dn[j]) { 755 conv = 3; 756 dn[j--] = ' '; 757 } 758 } 759 if (i < l) 760 conv = 3; 761 dp--; 762 } else { 763 for (dp = cp; *--dp == ' ' || *dp == '.';); 764 dp++; 765 } 766 767 /* 768 * Now convert the rest of the name 769 */ 770 for (i = j = 0; un < dp && j < 8; i++, j++, un++) { 771 if (*un != (dn[j] = unix2dos[*un]) 772 && conv != 3) 773 conv = 2; 774 if (!dn[j]) { 775 conv = 3; 776 dn[j--] = ' '; 777 } 778 } 779 if (un < dp) 780 conv = 3; 781 /* 782 * If we didn't have any chars in filename, 783 * generate a default 784 */ 785 if (!j) 786 dn[0] = '_'; 787 788 /* 789 * The first character cannot be E5, 790 * because that means a deleted entry 791 */ 792 if (dn[0] == 0xe5) 793 dn[0] = SLOT_E5; 794 795 /* 796 * If there wasn't any char dropped, 797 * there is no place for generation numbers 798 */ 799 if (conv != 3) { 800 if (gen > 1) 801 return 0; 802 return conv; 803 } 804 805 /* 806 * Now insert the generation number into the filename part 807 */ 808 for (wcp = gentext + sizeof(gentext); wcp > gentext && gen; gen /= 10) 809 *--wcp = gen % 10 + '0'; 810 if (gen) 811 return 0; 812 for (i = 8; dn[--i] == ' ';); 813 i++; 814 if (gentext + sizeof(gentext) - wcp + 1 > 8 - i) 815 i = 8 - (gentext + sizeof(gentext) - wcp + 1); 816 dn[i++] = '~'; 817 while (wcp < gentext + sizeof(gentext)) 818 dn[i++] = *wcp++; 819 return 3; 820} 821 822/* 823 * Create a Win95 long name directory entry 824 * Note: assumes that the filename is valid, 825 * i.e. doesn't consist solely of blanks and dots 826 */ 827int 828unix2winfn(un, unlen, wep, cnt, chksum) 829 const u_char *un; 830 int unlen; 831 struct winentry *wep; 832 int cnt; 833 int chksum; 834{ 835 const u_int8_t *cp; 836 u_int8_t *wcp; 837 int i; 838 839 /* 840 * Drop trailing blanks and dots 841 */ 842 for (cp = un + unlen; *--cp == ' ' || *cp == '.'; unlen--); 843 844 un += (cnt - 1) * WIN_CHARS; 845 unlen -= (cnt - 1) * WIN_CHARS; 846 847 /* 848 * Initialize winentry to some useful default 849 */ 850 for (wcp = (u_int8_t *)wep, i = sizeof(*wep); --i >= 0; *wcp++ = 0xff); 851 wep->weCnt = cnt; 852 wep->weAttributes = ATTR_WIN95; 853 wep->weReserved1 = 0; 854 wep->weChksum = chksum; 855 wep->weReserved2 = 0; 856 857 /* 858 * Now convert the filename parts 859 */ 860 for (wcp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) { 861 if (--unlen < 0) 862 goto done; 863 *wcp++ = *un++; 864 *wcp++ = 0; 865 } 866 for (wcp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) { 867 if (--unlen < 0) 868 goto done; 869 *wcp++ = *un++; 870 *wcp++ = 0; 871 } 872 for (wcp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) { 873 if (--unlen < 0) 874 goto done; 875 *wcp++ = *un++; 876 *wcp++ = 0; 877 } 878 if (!unlen) 879 wep->weCnt |= WIN_LAST; 880 return unlen; 881 882done: 883 *wcp++ = 0; 884 *wcp++ = 0; 885 wep->weCnt |= WIN_LAST; 886 return 0; 887} 888 889/* 890 * Compare our filename to the one in the Win95 entry 891 * Returns the checksum or -1 if no match 892 */ 893int 894winChkName(un, unlen, wep, chksum) 895 const u_char *un; 896 int unlen; 897 struct winentry *wep; 898 int chksum; 899{ 900 u_int8_t *cp; 901 int i; 902 903 /* 904 * First compare checksums 905 */ 906 if (wep->weCnt&WIN_LAST) 907 chksum = wep->weChksum; 908 else if (chksum != wep->weChksum) 909 chksum = -1; 910 if (chksum == -1) 911 return -1; 912 913 /* 914 * Offset of this entry 915 */ 916 i = ((wep->weCnt&WIN_CNT) - 1) * WIN_CHARS; 917 un += i; 918 if ((unlen -= i) <= 0) 919 return -1; 920 if ((wep->weCnt&WIN_LAST) && unlen > WIN_CHARS) 921 return -1; 922 923 /* 924 * Compare the name parts 925 */ 926 for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) { 927 if (--unlen < 0) { 928 if (!*cp++ && !*cp) 929 return chksum; 930 return -1; 931 } 932 if (u2l[*cp++] != u2l[*un++] || *cp++) 933 return -1; 934 } 935 for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) { 936 if (--unlen < 0) { 937 if (!*cp++ && !*cp) 938 return chksum; 939 return -1; 940 } 941 if (u2l[*cp++] != u2l[*un++] || *cp++) 942 return -1; 943 } 944 for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) { 945 if (--unlen < 0) { 946 if (!*cp++ && !*cp) 947 return chksum; 948 return -1; 949 } 950 if (u2l[*cp++] != u2l[*un++] || *cp++) 951 return -1; 952 } 953 return chksum; 954} 955 956/* 957 * Convert Win95 filename to dirbuf. 958 * Returns the checksum or -1 if impossible 959 */ 960int 961win2unixfn(wep, dp, chksum) 962 struct winentry *wep; 963 struct dirent *dp; 964 int chksum; 965{ 966 u_int8_t *cp; 967 u_int8_t *np, *ep = dp->d_name + WIN_MAXLEN; 968 u_int16_t code; 969 int i; 970 971 if ((wep->weCnt&WIN_CNT) > howmany(WIN_MAXLEN, WIN_CHARS) 972 || !(wep->weCnt&WIN_CNT)) 973 return -1; 974 975 /* 976 * First compare checksums 977 */ 978 if (wep->weCnt&WIN_LAST) { 979 chksum = wep->weChksum; 980 /* 981 * This works even though d_namlen is one byte! 982 */ 983 dp->d_namlen = (wep->weCnt&WIN_CNT) * WIN_CHARS; 984 } else if (chksum != wep->weChksum) 985 chksum = -1; 986 if (chksum == -1) 987 return -1; 988 989 /* 990 * Offset of this entry 991 */ 992 i = ((wep->weCnt&WIN_CNT) - 1) * WIN_CHARS; 993 np = (u_int8_t *)dp->d_name + i; 994 995 /* 996 * Convert the name parts 997 */ 998 for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) { 999 code = (cp[1] << 8) | cp[0]; 1000 switch (code) { 1001 case 0: 1002 *np = '\0'; 1003 dp->d_namlen -= sizeof(wep->wePart2)/2 1004 + sizeof(wep->wePart3)/2 + i + 1; 1005 return chksum; 1006 case '/': 1007 *np = '\0'; 1008 return -1; 1009 default: 1010 if (code & 0xff00) { 1011 if ((code &~ 0xff) == 0x400) 1012 code = cyr2u[code & 0xff]; 1013 else 1014 return -1; 1015 } 1016 *np++ = code; 1017 break; 1018 } 1019 /* 1020 * The size comparison should result in the compiler 1021 * optimizing the whole if away 1022 */ 1023 if (WIN_MAXLEN % WIN_CHARS < sizeof(wep->wePart1) / 2 1024 && np > ep) { 1025 np[-1] = 0; 1026 return -1; 1027 } 1028 cp += 2; 1029 } 1030 for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) { 1031 code = (cp[1] << 8) | cp[0]; 1032 switch (code) { 1033 case 0: 1034 *np = '\0'; 1035 dp->d_namlen -= sizeof(wep->wePart3)/2 + i + 1; 1036 return chksum; 1037 case '/': 1038 *np = '\0'; 1039 return -1; 1040 default: 1041 if (code & 0xff00) { 1042 if ((code &~ 0xff) == 0x400) 1043 code = cyr2u[code & 0xff]; 1044 else 1045 return -1; 1046 } 1047 *np++ = code; 1048 break; 1049 } 1050 /* 1051 * The size comparisons should be optimized away 1052 */ 1053 if (WIN_MAXLEN % WIN_CHARS >= sizeof(wep->wePart1) / 2 1054 && WIN_MAXLEN % WIN_CHARS < (sizeof(wep->wePart1) + sizeof(wep->wePart2)) / 2 1055 && np > ep) { 1056 np[-1] = 0; 1057 return -1; 1058 } 1059 cp += 2; 1060 } 1061 for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) { 1062 code = (cp[1] << 8) | cp[0]; 1063 switch (code) { 1064 case 0: 1065 *np = '\0'; 1066 dp->d_namlen -= i + 1; 1067 return chksum; 1068 case '/': 1069 *np = '\0'; 1070 return -1; 1071 default: 1072 if (code & 0xff00) { 1073 if ((code &~ 0xff) == 0x400) 1074 code = cyr2u[code & 0xff]; 1075 else 1076 return -1; 1077 } 1078 *np++ = code; 1079 break; 1080 } 1081 /* 1082 * See above 1083 */ 1084 if (WIN_MAXLEN % WIN_CHARS >= (sizeof(wep->wePart1) + sizeof(wep->wePart2)) / 2 1085 && np > ep) { 1086 np[-1] = 0; 1087 return -1; 1088 } 1089 cp += 2; 1090 } 1091 return chksum; 1092} 1093 1094/* 1095 * Compute the checksum of a DOS filename for Win95 use 1096 */ 1097u_int8_t 1098winChksum(name) 1099 u_int8_t *name; 1100{ 1101 int i; 1102 u_int8_t s; 1103 1104 for (s = 0, i = 11; --i >= 0; s += *name++) 1105 s = (s << 7)|(s >> 1); 1106 return s; 1107} 1108 1109/* 1110 * Determine the number of slots necessary for Win95 names 1111 */ 1112int 1113winSlotCnt(un, unlen) 1114 const u_char *un; 1115 int unlen; 1116{ 1117 for (un += unlen; unlen > 0; unlen--) 1118 if (*--un != ' ' && *un != '.') 1119 break; 1120 if (unlen > WIN_MAXLEN) 1121 return 0; 1122 return howmany(unlen, WIN_CHARS); 1123} 1124