cd9660_util.c revision 1.1
1 /* $NetBSD: cd9660_util.c,v 1.1 2002/12/23 17:52:09 jdolecek Exp $ */ 2 3 /*- 4 * Copyright (c) 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley 8 * by Pace Willisson (pace (at) blitz.com). The Rock Ridge Extension 9 * Support code is derived from software contributed to Berkeley 10 * by Atsushi Murai (amurai (at) spec.co.jp). 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)cd9660_util.c 8.3 (Berkeley) 12/5/94 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: cd9660_util.c,v 1.1 2002/12/23 17:52:09 jdolecek Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/namei.h> 49 #include <sys/resourcevar.h> 50 #include <sys/kernel.h> 51 #include <sys/file.h> 52 #include <sys/stat.h> 53 #include <sys/buf.h> 54 #include <sys/proc.h> 55 #include <sys/mount.h> 56 #include <sys/vnode.h> 57 #include <sys/malloc.h> 58 #include <sys/dirent.h> 59 60 #include <fs/cd9660/iso.h> 61 #include <fs/cd9660/cd9660_extern.h> 62 63 /* 64 * Get one character out of an iso filename 65 * Return number of bytes consumed 66 */ 67 int 68 isochar(isofn, isoend, joliet_level, c) 69 const u_char *isofn; 70 const u_char *isoend; 71 int joliet_level; 72 u_char *c; 73 { 74 *c = *isofn++; 75 if (joliet_level == 0 || isofn == isoend) 76 /* (00) and (01) are one byte in Joliet, too */ 77 return 1; 78 79 /* No Unicode support yet :-( */ 80 switch (*c) { 81 default: 82 *c = '?'; 83 break; 84 case '\0': 85 *c = *isofn; 86 break; 87 } 88 return 2; 89 } 90 91 /* 92 * translate and compare a filename 93 * Note: Version number plus ';' may be omitted. 94 */ 95 int 96 isofncmp(fn, fnlen, isofn, isolen, joliet_level) 97 const u_char *fn, *isofn; 98 int fnlen, isolen, joliet_level; 99 { 100 int i, j; 101 char c; 102 const u_char *isoend = isofn + isolen; 103 104 while (--fnlen >= 0) { 105 if (isofn == isoend) 106 return *fn; 107 isofn += isochar(isofn, isoend, joliet_level, &c); 108 if (c == ';') { 109 switch (*fn++) { 110 default: 111 return *--fn; 112 case 0: 113 return 0; 114 case ';': 115 break; 116 } 117 for (i = 0; --fnlen >= 0; i = i * 10 + *fn++ - '0') { 118 if (*fn < '0' || *fn > '9') { 119 return -1; 120 } 121 } 122 for (j = 0; isofn != isoend; j = j * 10 + c - '0') 123 isofn += isochar(isofn, isoend, 124 joliet_level, &c); 125 return i - j; 126 } 127 if (((u_char) c) != *fn) { 128 if (c >= 'A' && c <= 'Z') { 129 if (c + ('a' - 'A') != *fn) { 130 if (*fn >= 'a' && *fn <= 'z') 131 return *fn - ('a' - 'A') - c; 132 else 133 return *fn - c; 134 } 135 } else 136 return *fn - c; 137 } 138 fn++; 139 } 140 if (isofn != isoend) { 141 isofn += isochar(isofn, isoend, joliet_level, &c); 142 switch (c) { 143 default: 144 return -1; 145 case '.': 146 if (isofn != isoend) { 147 isochar(isofn, isoend, joliet_level, &c); 148 if (c == ';') 149 return 0; 150 } 151 return -1; 152 case ';': 153 return 0; 154 } 155 } 156 return 0; 157 } 158 159 /* 160 * translate a filename 161 */ 162 void 163 isofntrans(infn, infnlen, outfn, outfnlen, original, casetrans, assoc, joliet_level) 164 u_char *infn, *outfn; 165 int infnlen; 166 u_short *outfnlen; 167 int original; 168 int casetrans; 169 int assoc; 170 int joliet_level; 171 { 172 int fnidx = 0; 173 u_char *infnend = infn + infnlen; 174 175 if (assoc) { 176 *outfn++ = ASSOCCHAR; 177 fnidx++; 178 } 179 for (; infn != infnend; fnidx++) { 180 char c; 181 182 infn += isochar(infn, infnend, joliet_level, &c); 183 184 if (casetrans && joliet_level == 0 && c >= 'A' && c <= 'Z') 185 *outfn++ = c + ('a' - 'A'); 186 else if (!original && c == ';') { 187 if (fnidx > 0 && outfn[-1] == '.') 188 fnidx--; 189 break; 190 } else 191 *outfn++ = c; 192 } 193 *outfnlen = fnidx; 194 } 195
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