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, (const char **)&inp, &i, &outp, &j); 84 len -= j; 85 if (clen) *clen = len; 86 *c = '\0'; 87 while(len--) 88 *c |= (*(outp - len - 1) & 0xff) << (len << 3); 89 } else { 90 switch (*c) { 91 default: 92 *c = '?'; 93 break; 94 case '\0': 95 *c = *isofn; 96 break; 97 } 98 } 99 100 return 2; 101 } 102 103 /* 104 * translate and compare a filename 105 * returns (fn - isofn) 106 * Note: Version number plus ';' may be omitted. 107 */ 108 int 109 isofncmp(fn, fnlen, isofn, isolen, joliet_level, flags, handle, lhandle) 110 u_char *fn; 111 int fnlen; 112 u_char *isofn; 113 int isolen; 114 int joliet_level; 115 int flags; 116 void *handle; 117 void *lhandle; 118 { 119 int i, j; 120 u_short c, d; 121 u_char *fnend = fn + fnlen, *isoend = isofn + isolen; 122 123 for (; fn < fnend; ) { 124 d = sgetrune(fn, fnend - fn, (char const **)&fn, flags, lhandle); 125 if (isofn == isoend) 126 return d; 127 isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle); 128 if (c == ';') { 129 if (d != ';') 130 return d; 131 for (i = 0; fn < fnend; i = i * 10 + *fn++ - '0') { 132 if (*fn < '0' || *fn > '9') { 133 return -1; 134 } 135 } 136 for (j = 0; isofn != isoend; j = j * 10 + c - '0') 137 isofn += isochar(isofn, isoend, 138 joliet_level, &c, 139 NULL, flags, handle); 140 return i - j; 141 } 142 if (c != d) { 143 if (c >= 'A' && c <= 'Z') { 144 if (c + ('a' - 'A') != d) { 145 if (d >= 'a' && d <= 'z') 146 return d - ('a' - 'A') - c; 147 else 148 return d - c; 149 } 150 } else 151 return d - c; 152 } 153 } 154 if (isofn != isoend) { 155 isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle); 156 switch (c) { 157 default: 158 return -c; 159 case '.': 160 if (isofn != isoend) { 161 isochar(isofn, isoend, joliet_level, &c, 162 NULL, flags, handle); 163 if (c == ';') 164 return 0; 165 } 166 return -1; 167 case ';': 168 return 0; 169 } 170 } 171 return 0; 172 } 173 174 /* 175 * translate a filename of length > 0 176 */ 177 void 178 isofntrans(infn, infnlen, outfn, outfnlen, original, assoc, joliet_level, flags, handle) 179 u_char *infn; 180 int infnlen; 181 u_char *outfn; 182 u_short *outfnlen; 183 int original; 184 int assoc; 185 int joliet_level; 186 int flags; 187 void *handle; 188 { 189 u_short c, d = '\0'; 190 u_char *outp = outfn, *infnend = infn + infnlen; 191 int clen; 192 193 if (assoc) { 194 *outp++ = ASSOCCHAR; 195 } 196 for (; infn != infnend; ) { 197 infn += isochar(infn, infnend, joliet_level, &c, &clen, flags, handle); 198 199 if (!original && !joliet_level && c >= 'A' && c <= 'Z') 200 c += ('a' - 'A'); 201 else if (!original && c == ';') { 202 outp -= (d == '.'); 203 break; 204 } 205 d = c; 206 while(clen--) 207 *outp++ = c >> (clen << 3); 208 } 209 *outfnlen = outp - outfn; 210 } 211 212 /* 213 * same as sgetrune(3) 214 */ 215 u_short 216 sgetrune(string, n, result, flags, handle) 217 const char *string; 218 size_t n; 219 char const **result; 220 int flags; 221 void *handle; 222 { 223 size_t i, j, len; 224 char outbuf[3], *outp; 225 u_short c = '\0'; 226 227 len = i = (n < 2) ? n : 2; 228 j = 2; 229 outp = outbuf; 230 231 if (flags & ISOFSMNT_KICONV && cd9660_iconv) { 232 cd9660_iconv->convchr(handle, (const char **)&string, 233 &i, &outp, &j); 234 len -= i; 235 } else { 236 len = 1; 237 string++; 238 } 239 240 if (result) *result = string; 241 while(len--) c |= (*(string - len - 1) & 0xff) << (len << 3); 242 return (c); 243 } 244