distrib/cdrom/macppc_installboot/cd9660_util.c

   1 /*      $NetBSD: cd9660_util.c,v 1.1 2006/09/17 03:56:03 tsutsui Exp $  */
   2
   3 /*-
   4  * Copyright (c) 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley
   8  * by Pace Willisson (pace@blitz.com).  The Rock Ridge Extension
   9  * Support code is derived from software contributed to Berkeley
  10  * by Atsushi Murai (amurai@spec.co.jp).
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      @(#)cd9660_util.c       8.3 (Berkeley) 12/5/94
  37  */
  38
  39 /* from NetBSD: cd9660_util.c,v 1.5 2004/12/28 01:12:26 jdolecek Exp */
  40
  41 #if HAVE_NBTOOL_CONFIG_H
  42 #include "nbtool_config.h"
  43 #endif
  44
  45 #include <assert.h>
  46 #include <sys/param.h>
  47 #include <sys/dirent.h>
  48
  49 #include <fs/cd9660/iso.h>
  50 #define KASSERT(x)      assert(x)       /* XXX for <fs/unicode.h> */
  51 #include <fs/unicode.h>
  52
  53 #include "installboot.h"
  54
  55 static int isochar(const u_char *, const u_char *, int, uint16_t *);
  56 static uint16_t wget(const u_char **, size_t *, int);
  57 static int wput(u_char *, size_t, uint16_t, int);
  58
  59 int cd9660_utf8_joliet = 1;
  60
  61 /*
  62  * Get one character out of an iso filename
  63  * Return number of bytes consumed
  64  */
  65 int
  66 isochar(const u_char *isofn, const u_char *isoend, int joliet_level,
  67     uint16_t *c)
  68 {
  69
  70         *c = isofn[0];
  71         if (joliet_level == 0 || isofn + 1 == isoend) {
  72                 /* (00) and (01) are one byte in Joliet, too */
  73                 return 1;
  74         }
  75
  76         if (cd9660_utf8_joliet) {
  77                 *c = (*c << 8) + isofn[1];
  78         } else {
  79                 /* characters outside ISO-8859-1 subset replaced with '?' */
  80                 if (*c != 0)
  81                         *c = '?';
  82                 else
  83                         *c = isofn[1];
  84         }
  85
  86         return 2;
  87 }
  88
  89 /*
  90  * translate and compare a filename
  91  * Note: Version number plus ';' may be omitted.
  92  */
  93 int
  94 isofncmp(const u_char *fn, size_t fnlen, const u_char *isofn, size_t isolen,
  95     int joliet_level)
  96 {
  97         int i, j;
  98         uint16_t fc, ic;
  99         const u_char *isoend = isofn + isolen;
 100
 101 #ifdef DEBUG
 102         printf("fn = %s, fnlen = %d, isofn = %s, isolen = %d\n",
 103             fn, fnlen, isofn, isolen);
 104 #endif
 105
 106         while (fnlen > 0) {
 107                 fc = wget(&fn, &fnlen, joliet_level);
 108
 109                 if (isofn == isoend)
 110                         return fc;
 111                 isofn += isochar(isofn, isoend, joliet_level, &ic);
 112                 if (ic == ';') {
 113                         switch (fc) {
 114                         default:
 115                                 return fc;
 116                         case 0:
 117                                 return 0;
 118                         case ';':
 119                                 break;
 120                         }
 121                         fn++;
 122                         for (i = 0; --fnlen >= 0; i = i * 10 + *fn++ - '0') {
 123                                 if (*fn < '0' || *fn > '9') {
 124                                         return -1;
 125                                 }
 126                         }
 127                         for (j = 0; isofn != isoend; j = j * 10 + ic - '0')
 128                                 isofn += isochar(isofn, isoend,
 129                                                  joliet_level, &ic);
 130                         return i - j;
 131                 }
 132                 if (ic != fc) {
 133                         if (ic >= 'A' && ic <= 'Z') {
 134                                 if (ic + ('a' - 'A') != fc) {
 135                                         if (fc >= 'a' && fc <= 'z')
 136                                                 fc -= 'a' - 'A';
 137
 138                                         return (int)fc - (int)ic;
 139                                 }
 140                         } else
 141                                 return (int)fc - (int)ic;
 142                 }
 143         }
 144         if (isofn != isoend) {
 145                 isofn += isochar(isofn, isoend, joliet_level, &ic);
 146                 switch (ic) {
 147                 default:
 148                         return -1;
 149                 case '.':
 150                         if (isofn != isoend) {
 151                                 isochar(isofn, isoend, joliet_level, &ic);
 152                                 if (ic == ';')
 153                                         return 0;
 154                         }
 155                         return -1;
 156                 case ';':
 157                         return 0;
 158                 }
 159         }
 160         return 0;
 161 }
 162
 163 /*
 164  * translate a filename
 165  */
 166 void
 167 isofntrans(u_char *infn, int infnlen, u_char *outfn, u_short *outfnlen,
 168     int original, int casetrans, int assoc, int joliet_level)
 169 {
 170         int fnidx = 0;
 171         u_char *infnend = infn + infnlen;
 172         uint16_t c;
 173         int sz;
 174
 175         if (assoc) {
 176                 *outfn++ = ASSOCCHAR;
 177                 fnidx++;
 178         }
 179
 180         for(; infn != infnend; fnidx += sz) {
 181                 infn += isochar(infn, infnend, joliet_level, &c);
 182
 183                 if (casetrans && joliet_level == 0 && c >= 'A' && c <= 'Z')
 184                         c = c + ('a' - 'A');
 185                 else if (!original && c == ';') {
 186                         if (fnidx > 0 && outfn[-1] == '.')
 187                                 fnidx--;
 188                         break;
 189                 }
 190
 191                 sz = wput(outfn, MAXNAMLEN - fnidx, c, joliet_level);
 192                 if (sz == 0) {
 193                         /* not enough space to write the character */
 194                         if (fnidx < MAXNAMLEN) {
 195                                 *outfn = '?';
 196                                 fnidx++;
 197                         }
 198                         break;
 199                 }
 200                 outfn += sz;
 201         }
 202         *outfnlen = fnidx;
 203 }
 204
 205 static uint16_t
 206 wget(const u_char **str, size_t *sz, int joliet_level)
 207 {
 208         if (joliet_level > 0 && cd9660_utf8_joliet) {
 209                 /* decode UTF-8 sequence */
 210                 return wget_utf8((const char **) str, sz);
 211         } else {
 212                 /*
 213                  * Raw 8-bit characters without any conversion. For Joliet,
 214                  * this effectively assumes provided file name is using
 215                  * ISO-8859-1 subset.
 216                  */
 217                 uint16_t c = *str[0];
 218                 (*str)++;
 219
 220                 return c;
 221         }
 222 }
 223
 224 static int
 225 wput(u_char *s, size_t n, uint16_t c, int joliet_level)
 226 {
 227         if (joliet_level > 0 && cd9660_utf8_joliet) {
 228                 /* Store Joliet file name encoded into UTF-8 */
 229                 return wput_utf8((char *)s, n, c);
 230         } else {
 231                 /*
 232                  * Store raw 8-bit characters without any conversion.
 233                  * For Joliet case, this filters the Unicode characters
 234                  * to ISO-8859-1 subset.
 235                  */
 236                 *s = (u_char)c;
 237                 return 1;
 238         }
 239 }