1 /* $OpenBSD: cd9660_util.c,v 1.5 1999/07/01 02:20:22 d Exp $ */ 2 /* $NetBSD: cd9660_util.c,v 1.12 1997/01/24 00:27:33 cgd Exp $ */ 3 4 /*- 5 * Copyright (c) 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley 9 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 10 * Support code is derived from software contributed to Berkeley 11 * by Atsushi Murai (amurai@spec.co.jp). Joliet support was added by 12 * Joachim Kuebart (joki@kuebart.stuttgart.netsurf.de). 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the University of 25 * California, Berkeley and its contributors. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * @(#)cd9660_util.c 8.3 (Berkeley) 12/5/94 43 */ 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/namei.h> 48 #include <sys/resourcevar.h> 49 #include <sys/kernel.h> 50 #include <sys/file.h> 51 #include <sys/stat.h> 52 #include <sys/buf.h> 53 #include <sys/proc.h> 54 #include <sys/conf.h> 55 #include <sys/mount.h> 56 #include <sys/vnode.h> 57 #include <sys/malloc.h> 58 #include <sys/dirent.h> 59 60 #include <isofs/cd9660/iso.h> 61 #include <isofs/cd9660/cd9660_extern.h> 62 63 /* 64 * Get one character out of an iso filename 65 * Obey joliet_level 66 * Return number of bytes consumed 67 */ 68 int 69 isochar(isofn, isoend, joliet_level, c) 70 const u_char *isofn; 71 const u_char *isoend; 72 int joliet_level; 73 u_char *c; 74 { 75 *c = *isofn++; 76 if (joliet_level == 0 || isofn == isoend) 77 /* (00) and (01) are one byte in Joliet, too */ 78 return 1; 79 80 /* No Unicode support yet :-( */ 81 switch (*c) { 82 default: 83 *c = '?'; 84 break; 85 case '\0': 86 *c = *isofn; 87 break; 88 } 89 return 2; 90 } 91 92 /* 93 * translate and compare a filename 94 * returns (fn - isofn) 95 * Note: Version number plus ';' may be omitted. 96 */ 97 int 98 isofncmp(fn, fnlen, isofn, isolen, joliet_level) 99 const u_char *fn, *isofn; 100 int fnlen, isolen, joliet_level; 101 { 102 int i, j; 103 u_char c; 104 const u_char *fnend = fn + fnlen, *isoend = isofn + isolen; 105 106 for (; fn != fnend; fn++) { 107 if (isofn == isoend) 108 return *fn; 109 isofn += isochar(isofn, isoend, joliet_level, &c); 110 if (c == ';') { 111 if (*fn++ != ';') 112 return fn[-1]; 113 for (i = 0; fn != fnend; i = i * 10 + *fn++ - '0') { 114 if (*fn < '0' || *fn > '9') { 115 return -1; 116 } 117 } 118 for (j = 0; isofn != isoend; j = j * 10 + c - '0') 119 isofn += isochar(isofn, isoend, 120 joliet_level, &c); 121 return i - j; 122 } 123 if (((u_char) c) != *fn) { 124 if (c >= 'A' && c <= 'Z') { 125 if (c + ('a' - 'A') != *fn) { 126 if (*fn >= 'a' && *fn <= 'z') 127 return *fn - ('a' - 'A') - c; 128 else 129 return *fn - c; 130 } 131 } else 132 return *fn - c; 133 } 134 } 135 if (isofn != isoend) { 136 isofn += isochar(isofn, isoend, joliet_level, &c); 137 switch (c) { 138 default: 139 return -c; 140 case '.': 141 if (isofn != isoend) { 142 isochar(isofn, isoend, joliet_level, &c); 143 if (c == ';') 144 return 0; 145 } 146 return -1; 147 case ';': 148 return 0; 149 } 150 } 151 return 0; 152 } 153 154 /* 155 * translate a filename of length > 0 156 */ 157 void 158 isofntrans(infn, infnlen, outfn, outfnlen, original, assoc, joliet_level) 159 u_char *infn, *outfn; 160 int infnlen; 161 u_short *outfnlen; 162 int original; 163 int assoc; 164 int joliet_level; 165 { 166 int fnidx = 0; 167 u_char c, d = '\0', *infnend = infn + infnlen; 168 169 if (assoc) { 170 *outfn++ = ASSOCCHAR; 171 fnidx++; 172 } 173 for (; infn != infnend; fnidx++) { 174 infn += isochar(infn, infnend, joliet_level, &c); 175 176 if (!original && c == ';') { 177 fnidx -= (d == '.'); 178 break; 179 } else 180 *outfn++ = c; 181 d = c; 182 } 183 *outfnlen = fnidx; 184 } 185