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("$FreeBSD$"); 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++ - '0') { 134 if (*fn < '0' || *fn > '9') { 135 return -1; 136 } 137 } 138 for (j = 0; isofn != isoend; j = j * 10 + c - '0') 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 } 246