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 1.4 2004/04/12 23:18:55 cpressey Exp $ 42 */ 43 44 #include <sys/param.h> 45 #include <sys/mount.h> 46 #include <sys/vnode.h> 47 48 #include "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(u_char *isofn, u_char *isoend, int joliet_level, u_char *c) 65 { 66 *c = *isofn++; 67 if (joliet_level == 0 || isofn == isoend) 68 /* (00) and (01) are one byte in Joliet, too */ 69 return 1; 70 71 /* No Unicode support yet :-( */ 72 switch (*c) { 73 default: 74 *c = '?'; 75 break; 76 case '\0': 77 *c = *isofn; 78 break; 79 } 80 /* XXX: if Unicode conversion routine is loaded then use it */ 81 if (cd9660_wchar2char != NULL) 82 *c = cd9660_wchar2char((*(isofn - 1) << 8) | *isofn); 83 84 return 2; 85 } 86 87 /* 88 * translate and compare a filename 89 * returns (fn - isofn) 90 * Note: Version number plus ';' may be omitted. 91 */ 92 int 93 isofncmp(u_char *fn, int fnlen, u_char *isofn, int isolen, int joliet_level) 94 { 95 int i, j; 96 u_char c, *fnend = fn + fnlen, *isoend = isofn + isolen; 97 98 for (; fn != fnend; fn++) { 99 if (isofn == isoend) 100 return *fn; 101 isofn += isochar(isofn, isoend, joliet_level, &c); 102 if (c == ';') { 103 if (*fn++ != ';') 104 return fn[-1]; 105 for (i = 0; fn != fnend; i = i * 10 + *fn++ - '0') { 106 if (*fn < '0' || *fn > '9') { 107 return -1; 108 } 109 } 110 for (j = 0; isofn != isoend; j = j * 10 + c - '0') 111 isofn += isochar(isofn, isoend, 112 joliet_level, &c); 113 return i - j; 114 } 115 if (c != *fn) { 116 if (c >= 'A' && c <= 'Z') { 117 if (c + ('a' - 'A') != *fn) { 118 if (*fn >= 'a' && *fn <= 'z') 119 return *fn - ('a' - 'A') - c; 120 else 121 return *fn - c; 122 } 123 } else 124 return *fn - c; 125 } 126 } 127 if (isofn != isoend) { 128 isofn += isochar(isofn, isoend, joliet_level, &c); 129 switch (c) { 130 default: 131 return -c; 132 case '.': 133 if (isofn != isoend) { 134 isochar(isofn, isoend, joliet_level, &c); 135 if (c == ';') 136 return 0; 137 } 138 return -1; 139 case ';': 140 return 0; 141 } 142 } 143 return 0; 144 } 145 146 /* 147 * translate a filename of length > 0 148 */ 149 void 150 isofntrans(u_char *infn, int infnlen, u_char *outfn, u_short *outfnlen, 151 int original, int assoc, int joliet_level) 152 { 153 int fnidx = 0; 154 u_char c, d = '\0', *infnend = infn + infnlen; 155 156 if (assoc) { 157 *outfn++ = ASSOCCHAR; 158 fnidx++; 159 } 160 for (; infn != infnend; fnidx++) { 161 infn += isochar(infn, infnend, joliet_level, &c); 162 163 if (!original && !joliet_level && c >= 'A' && c <= 'Z') 164 *outfn++ = c + ('a' - 'A'); 165 else if (!original && c == ';') { 166 fnidx -= (d == '.'); 167 break; 168 } else 169 *outfn++ = c; 170 d = c; 171 } 172 *outfnlen = fnidx; 173 } 174