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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)cd9660_util.c 8.3 (Berkeley) 12/5/94 40 */ 41 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/mount.h> 48 #include <sys/vnode.h> 49 50 #include <isofs/cd9660/iso.h> 51 52 /* 53 * XXX: limited support for loading of Unicode 54 * conversion routine as a kld at a run-time. 55 * Should be removed when native Unicode kernel 56 * interfaces have been introduced. 57 */ 58 u_char (*cd9660_wchar2char)(u_int32_t wchar) = NULL; 59 60 /* 61 * Get one character out of an iso filename 62 * Obey joliet_level 63 * Return number of bytes consumed 64 */ 65 int 66 isochar(isofn, isoend, joliet_level, c) 67 u_char *isofn; 68 u_char *isoend; 69 int joliet_level; 70 u_char *c; 71 { 72 *c = *isofn++; 73 if (joliet_level == 0 || isofn == isoend) 74 /* (00) and (01) are one byte in Joliet, too */ 75 return 1; 76 77 /* No Unicode support yet :-( */ 78 switch (*c) { 79 default: 80 *c = '?'; 81 break; 82 case '\0': 83 *c = *isofn; 84 break; 85 } 86 /* XXX: if Unicode conversion routine is loaded then use it */ 87 if (cd9660_wchar2char != NULL) 88 *c = cd9660_wchar2char((*(isofn - 1) << 8) | *isofn); 89 90 return 2; 91 } 92 93 /* 94 * translate and compare a filename 95 * returns (fn - isofn) 96 * Note: Version number plus ';' may be omitted. 97 */ 98 int 99 isofncmp(fn, fnlen, isofn, isolen, joliet_level) 100 u_char *fn; 101 int fnlen; 102 u_char *isofn; 103 int isolen; 104 int joliet_level; 105 { 106 int i, j; 107 u_char c, *fnend = fn + fnlen, *isoend = isofn + isolen; 108 109 for (; fn != fnend; fn++) { 110 if (isofn == isoend) 111 return *fn; 112 isofn += isochar(isofn, isoend, joliet_level, &c); 113 if (c == ';') { 114 if (*fn++ != ';') 115 return fn[-1]; 116 for (i = 0; fn != fnend; i = i * 10 + *fn++ - '0') { 117 if (*fn < '0' || *fn > '9') { 118 return -1; 119 } 120 } 121 for (j = 0; isofn != isoend; j = j * 10 + c - '0') 122 isofn += isochar(isofn, isoend, 123 joliet_level, &c); 124 return i - j; 125 } 126 if (c != *fn) { 127 if (c >= 'A' && c <= 'Z') { 128 if (c + ('a' - 'A') != *fn) { 129 if (*fn >= 'a' && *fn <= 'z') 130 return *fn - ('a' - 'A') - c; 131 else 132 return *fn - c; 133 } 134 } else 135 return *fn - c; 136 } 137 } 138 if (isofn != isoend) { 139 isofn += isochar(isofn, isoend, joliet_level, &c); 140 switch (c) { 141 default: 142 return -c; 143 case '.': 144 if (isofn != isoend) { 145 isochar(isofn, isoend, joliet_level, &c); 146 if (c == ';') 147 return 0; 148 } 149 return -1; 150 case ';': 151 return 0; 152 } 153 } 154 return 0; 155 } 156 157 /* 158 * translate a filename of length > 0 159 */ 160 void 161 isofntrans(infn, infnlen, outfn, outfnlen, original, assoc, joliet_level) 162 u_char *infn; 163 int infnlen; 164 u_char *outfn; 165 u_short *outfnlen; 166 int original; 167 int assoc; 168 int joliet_level; 169 { 170 int fnidx = 0; 171 u_char c, d = '\0', *infnend = infn + infnlen; 172 173 if (assoc) { 174 *outfn++ = ASSOCCHAR; 175 fnidx++; 176 } 177 for (; infn != infnend; fnidx++) { 178 infn += isochar(infn, infnend, joliet_level, &c); 179 180 if (!original && !joliet_level && c >= 'A' && c <= 'Z') 181 *outfn++ = c + ('a' - 'A'); 182 else if (!original && c == ';') { 183 fnidx -= (d == '.'); 184 break; 185 } else 186 *outfn++ = c; 187 d = c; 188 } 189 *outfnlen = fnidx; 190 } 191