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 */ 42 43 #include <sys/param.h> 44 #include <sys/mount.h> 45 #include <sys/vnode.h> 46 47 #include <isofs/cd9660/iso.h> 48 49 /* 50 * XXX: limited support for loading of Unicode 51 * conversion routine as a kld at a run-time. 52 * Should be removed when native Unicode kernel 53 * interfaces have been introduced. 54 */ 55 u_char (*cd9660_wchar2char)(u_int32_t wchar) = NULL; 56 57 /* 58 * Get one character out of an iso filename 59 * Obey joliet_level 60 * Return number of bytes consumed 61 */ 62 int 63 isochar(isofn, isoend, joliet_level, c) 64 u_char *isofn; 65 u_char *isoend; 66 int joliet_level; 67 u_char *c; 68 { 69 *c = *isofn++; 70 if (joliet_level == 0 || isofn == isoend) 71 /* (00) and (01) are one byte in Joliet, too */ 72 return 1; 73 74 /* No Unicode support yet :-( */ 75 switch (*c) { 76 default: 77 *c = '?'; 78 break; 79 case '\0': 80 *c = *isofn; 81 break; 82 } 83 /* XXX: if Unicode conversion routine is loaded then use it */ 84 if (cd9660_wchar2char != NULL) 85 *c = cd9660_wchar2char((*(isofn - 1) << 8) | *isofn); 86 87 return 2; 88 } 89 90 /* 91 * translate and compare a filename 92 * returns (fn - isofn) 93 * Note: Version number plus ';' may be omitted. 94 */ 95 int 96 isofncmp(fn, fnlen, isofn, isolen, joliet_level) 97 u_char *fn; 98 int fnlen; 99 u_char *isofn; 100 int isolen; 101 int joliet_level; 102 { 103 int i, j; 104 u_char c, *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 (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; 160 int infnlen; 161 u_char *outfn; 162 u_short *outfnlen; 163 int original; 164 int assoc; 165 int joliet_level; 166 { 167 int fnidx = 0; 168 u_char c, d = '\0', *infnend = infn + infnlen; 169 170 if (assoc) { 171 *outfn++ = ASSOCCHAR; 172 fnidx++; 173 } 174 for (; infn != infnend; fnidx++) { 175 infn += isochar(infn, infnend, joliet_level, &c); 176 177 if (!original && !joliet_level && c >= 'A' && c <= 'Z') 178 *outfn++ = c + ('a' - 'A'); 179 else if (!original && c == ';') { 180 fnidx -= (d == '.'); 181 break; 182 } else 183 *outfn++ = c; 184 d = c; 185 } 186 *outfnlen = fnidx; 187 } 188