cd9660_util.c

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    1 /*-
    2  * Copyright (c) 1994
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * This code is derived from software contributed to Berkeley
    6  * by Pace Willisson (pace@blitz.com).  The Rock Ridge Extension
    7  * Support code is derived from software contributed to Berkeley
    8  * by Atsushi Murai (amurai@spec.co.jp). Joliet support was added by
    9  * Joachim Kuebart (joki@kuebart.stuttgart.netsurf.de).
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 4. Neither the name of the University nor the names of its contributors
   20  *    may be used to endorse or promote products derived from this software
   21  *    without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   33  * SUCH DAMAGE.
   34  *
   35  *      @(#)cd9660_util.c       8.3 (Berkeley) 12/5/94
   36  */
   37 
   38 #include <sys/cdefs.h>
   39 __FBSDID("$FreeBSD: releng/11.0/sys/fs/cd9660/cd9660_util.c 277899 2015-01-29 20:40:25Z dim $");
   40 
   41 #include <sys/param.h>
   42 #include <sys/systm.h>
   43 #include <sys/mount.h>
   44 #include <sys/vnode.h>
   45 #include <sys/iconv.h>
   46 
   47 #include <fs/cd9660/iso.h>
   48 #include <fs/cd9660/cd9660_mount.h>
   49 
   50 extern struct iconv_functions *cd9660_iconv;
   51 
   52 /*
   53  * Get one character out of an iso filename
   54  * Obey joliet_level
   55  * Return number of bytes consumed
   56  */
   57 int
   58 isochar(isofn, isoend, joliet_level, c, clen, flags, handle)
   59       u_char *isofn;
   60       u_char *isoend;
   61       int joliet_level;
   62       u_short *c;
   63       int *clen;
   64       int flags;
   65       void *handle;
   66 {
   67       size_t i, j, len;
   68       char inbuf[3], outbuf[3], *inp, *outp;
   69 
   70       *c = *isofn++;
   71       if (clen) *clen = 1;
   72       if (joliet_level == 0 || isofn == isoend)
   73               /* (00) and (01) are one byte in Joliet, too */
   74               return 1;
   75 
   76       if (flags & ISOFSMNT_KICONV && cd9660_iconv) {
   77               i = j = len = 2;
   78               inbuf[0]=(char)*(isofn - 1);
   79               inbuf[1]=(char)*isofn;
   80               inbuf[2]='\0';
   81               inp = inbuf;
   82               outp = outbuf;
   83               cd9660_iconv->convchr(handle, __DECONST(const char **, &inp), &i,
   84                   &outp, &j);
   85               len -= j;
   86               if (clen) *clen = len;
   87               *c = '\0';
   88               while(len--)
   89                       *c |= (*(outp - len - 1) & 0xff) << (len << 3);
   90       } else {
   91               switch (*c) {
   92               default:
   93                       *c = '?';
   94                       break;
   95               case '\0':
   96                       *c = *isofn;
   97                       break;
   98               }
   99       }
  100 
  101       return 2;
  102 }
  103 
  104 /*
  105  * translate and compare a filename
  106  * returns (fn - isofn)
  107  * Note: Version number plus ';' may be omitted.
  108  */
  109 int
  110 isofncmp(fn, fnlen, isofn, isolen, joliet_level, flags, handle, lhandle)
  111         u_char *fn;
  112         int fnlen;
  113         u_char *isofn;
  114         int isolen;
  115         int joliet_level;
  116         int flags;
  117         void *handle;
  118         void *lhandle;
  119 {
  120         int i, j;
  121         u_short c, d;
  122         u_char *fnend = fn + fnlen, *isoend = isofn + isolen;
  123 
  124         for (; fn < fnend; ) {
  125                 d = sgetrune(fn, fnend - fn, __DECONST(const char **, &fn),
  126                     flags, lhandle);
  127                 if (isofn == isoend)
  128                         return d;
  129                 isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle);
  130                 if (c == ';') {
  131                         if (d != ';')
  132                                 return d;
  133                         for (i = 0; fn < fnend; i = i * 10 + *fn++ - '') {
  134                                 if (*fn < '' || *fn > '9') {
  135                                         return -1;
  136                                 }
  137                         }
  138                         for (j = 0; isofn != isoend; j = j * 10 + c - '')
  139                                 isofn += isochar(isofn, isoend,
  140                                                  joliet_level, &c,
  141                                                  NULL, flags, handle);
  142                         return i - j;
  143                 }
  144                 if (c != d) {
  145                         if (c >= 'A' && c <= 'Z') {
  146                                 if (c + ('a' - 'A') != d) {
  147                                         if (d >= 'a' && d <= 'z')
  148                                                 return d - ('a' - 'A') - c;
  149                                         else
  150                                                 return d - c;
  151                                 }
  152                         } else
  153                                 return d - c;
  154                 }
  155         }
  156         if (isofn != isoend) {
  157                 isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle);
  158                 switch (c) {
  159                 default:
  160                         return -c;
  161                 case '.':
  162                         if (isofn != isoend) {
  163                                 isochar(isofn, isoend, joliet_level, &c,
  164                                         NULL, flags, handle);
  165                                 if (c == ';')
  166                                         return 0;
  167                         }
  168                         return -1;
  169                 case ';':
  170                         return 0;
  171                 }
  172         }
  173         return 0;
  174 }
  175 
  176 /*
  177  * translate a filename of length > 0
  178  */
  179 void
  180 isofntrans(infn, infnlen, outfn, outfnlen, original, assoc, joliet_level, flags, handle)
  181         u_char *infn;
  182         int infnlen;
  183         u_char *outfn;
  184         u_short *outfnlen;
  185         int original;
  186         int assoc;
  187         int joliet_level;
  188         int flags;
  189         void *handle;
  190 {
  191         u_short c, d = '\0';
  192         u_char *outp = outfn, *infnend = infn + infnlen;
  193         int clen;
  194 
  195         if (assoc) {
  196                 *outp++ = ASSOCCHAR;
  197         }
  198         for (; infn != infnend; ) {
  199                 infn += isochar(infn, infnend, joliet_level, &c, &clen, flags, handle);
  200 
  201                 if (!original && !joliet_level && c >= 'A' && c <= 'Z')
  202                         c += ('a' - 'A');
  203                 else if (!original && c == ';') {
  204                         outp -= (d == '.');
  205                         break;
  206                 }
  207                 d = c;
  208                 while(clen--)
  209                         *outp++ = c >> (clen << 3);
  210         }
  211         *outfnlen = outp - outfn;
  212 }
  213 
  214 /*
  215  * same as sgetrune(3)
  216  */
  217 u_short
  218 sgetrune(string, n, result, flags, handle)
  219         const char *string;
  220         size_t n;
  221         char const **result;
  222         int flags;
  223         void *handle;
  224 {
  225         size_t i, j, len;
  226         char outbuf[3], *outp;
  227         u_short c = '\0';
  228 
  229         len = i = (n < 2) ? n : 2;
  230         j = 2;
  231         outp = outbuf;
  232 
  233         if (flags & ISOFSMNT_KICONV && cd9660_iconv) {
  234                 cd9660_iconv->convchr(handle, (const char **)&string,
  235                         &i, &outp, &j);
  236                 len -= i;
  237         } else {
  238                 len = 1;
  239                 string++;
  240         }
  241 
  242         if (result) *result = string;
  243         while(len--) c |= (*(string - len - 1) & 0xff) << (len << 3);
  244         return (c);
  245 }

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FreeBSD/Linux Kernel Cross Reference sys/fs/cd9660/cd9660_util.c

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sys/fs/cd9660/cd9660_util.c