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 * $FreeBSD: src/sys/isofs/cd9660/cd9660_util.c,v 1.13.2.1 2001/02/27 12:36:34 sobomax Exp $ 41 * $DragonFly: src/sys/vfs/isofs/cd9660/cd9660_util.c,v 1.2 2003/06/17 04:28:41 dillon Exp $ 42 */ 43 44 #include <sys/param.h> 45 #include <sys/mount.h> 46 #include <sys/vnode.h> 47 48 #include <isofs/cd9660/iso.h> 49 50 /* 51 * XXX: limited support for loading of Unicode 52 * conversion routine as a kld at a run-time. 53 * Should be removed when native Unicode kernel 54 * interfaces have been introduced. 55 */ 56 u_char (*cd9660_wchar2char)(u_int32_t wchar) = NULL; 57 58 /* 59 * Get one character out of an iso filename 60 * Obey joliet_level 61 * Return number of bytes consumed 62 */ 63 int 64 isochar(isofn, isoend, joliet_level, c) 65 u_char *isofn; 66 u_char *isoend; 67 int joliet_level; 68 u_char *c; 69 { 70 *c = *isofn++; 71 if (joliet_level == 0 || isofn == isoend) 72 /* (00) and (01) are one byte in Joliet, too */ 73 return 1; 74 75 /* No Unicode support yet :-( */ 76 switch (*c) { 77 default: 78 *c = '?'; 79 break; 80 case '\0': 81 *c = *isofn; 82 break; 83 } 84 /* XXX: if Unicode conversion routine is loaded then use it */ 85 if (cd9660_wchar2char != NULL) 86 *c = cd9660_wchar2char((*(isofn - 1) << 8) | *isofn); 87 88 return 2; 89 } 90 91 /* 92 * translate and compare a filename 93 * returns (fn - isofn) 94 * Note: Version number plus ';' may be omitted. 95 */ 96 int 97 isofncmp(fn, fnlen, isofn, isolen, joliet_level) 98 u_char *fn; 99 int fnlen; 100 u_char *isofn; 101 int isolen; 102 int joliet_level; 103 { 104 int i, j; 105 u_char c, *fnend = fn + fnlen, *isoend = isofn + isolen; 106 107 for (; fn != fnend; fn++) { 108 if (isofn == isoend) 109 return *fn; 110 isofn += isochar(isofn, isoend, joliet_level, &c); 111 if (c == ';') { 112 if (*fn++ != ';') 113 return fn[-1]; 114 for (i = 0; fn != fnend; i = i * 10 + *fn++ - '0') { 115 if (*fn < '0' || *fn > '9') { 116 return -1; 117 } 118 } 119 for (j = 0; isofn != isoend; j = j * 10 + c - '0') 120 isofn += isochar(isofn, isoend, 121 joliet_level, &c); 122 return i - j; 123 } 124 if (c != *fn) { 125 if (c >= 'A' && c <= 'Z') { 126 if (c + ('a' - 'A') != *fn) { 127 if (*fn >= 'a' && *fn <= 'z') 128 return *fn - ('a' - 'A') - c; 129 else 130 return *fn - c; 131 } 132 } else 133 return *fn - c; 134 } 135 } 136 if (isofn != isoend) { 137 isofn += isochar(isofn, isoend, joliet_level, &c); 138 switch (c) { 139 default: 140 return -c; 141 case '.': 142 if (isofn != isoend) { 143 isochar(isofn, isoend, joliet_level, &c); 144 if (c == ';') 145 return 0; 146 } 147 return -1; 148 case ';': 149 return 0; 150 } 151 } 152 return 0; 153 } 154 155 /* 156 * translate a filename of length > 0 157 */ 158 void 159 isofntrans(infn, infnlen, outfn, outfnlen, original, assoc, joliet_level) 160 u_char *infn; 161 int infnlen; 162 u_char *outfn; 163 u_short *outfnlen; 164 int original; 165 int assoc; 166 int joliet_level; 167 { 168 int fnidx = 0; 169 u_char c, d = '\0', *infnend = infn + infnlen; 170 171 if (assoc) { 172 *outfn++ = ASSOCCHAR; 173 fnidx++; 174 } 175 for (; infn != infnend; fnidx++) { 176 infn += isochar(infn, infnend, joliet_level, &c); 177 178 if (!original && !joliet_level && c >= 'A' && c <= 'Z') 179 *outfn++ = c + ('a' - 'A'); 180 else if (!original && c == ';') { 181 fnidx -= (d == '.'); 182 break; 183 } else 184 *outfn++ = c; 185 d = c; 186 } 187 *outfnlen = fnidx; 188 } 189