1 /* $NetBSD: cd9660_util.c,v 1.2 2003/08/07 16:31:35 agc 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@blitz.com). The Rock Ridge Extension
9 * Support code is derived from software contributed to Berkeley
10 * by Atsushi Murai (amurai@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. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)cd9660_util.c 8.3 (Berkeley) 12/5/94
37 */
38
39 #include <sys/cdefs.h>
40 __KERNEL_RCSID(0, "$NetBSD: cd9660_util.c,v 1.2 2003/08/07 16:31:35 agc Exp $");
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/namei.h>
45 #include <sys/resourcevar.h>
46 #include <sys/kernel.h>
47 #include <sys/file.h>
48 #include <sys/stat.h>
49 #include <sys/buf.h>
50 #include <sys/proc.h>
51 #include <sys/mount.h>
52 #include <sys/vnode.h>
53 #include <sys/malloc.h>
54 #include <sys/dirent.h>
55
56 #include <fs/cd9660/iso.h>
57 #include <fs/cd9660/cd9660_extern.h>
58
59 /*
60 * Get one character out of an iso filename
61 * Return number of bytes consumed
62 */
63 int
64 isochar(isofn, isoend, joliet_level, c)
65 const u_char *isofn;
66 const 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 return 2;
85 }
86
87 /*
88 * translate and compare a filename
89 * Note: Version number plus ';' may be omitted.
90 */
91 int
92 isofncmp(fn, fnlen, isofn, isolen, joliet_level)
93 const u_char *fn, *isofn;
94 int fnlen, isolen, joliet_level;
95 {
96 int i, j;
97 char c;
98 const u_char *isoend = isofn + isolen;
99
100 while (--fnlen >= 0) {
101 if (isofn == isoend)
102 return *fn;
103 isofn += isochar(isofn, isoend, joliet_level, &c);
104 if (c == ';') {
105 switch (*fn++) {
106 default:
107 return *--fn;
108 case 0:
109 return 0;
110 case ';':
111 break;
112 }
113 for (i = 0; --fnlen >= 0; i = i * 10 + *fn++ - '') {
114 if (*fn < '' || *fn > '9') {
115 return -1;
116 }
117 }
118 for (j = 0; isofn != isoend; j = j * 10 + c - '')
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 fn++;
135 }
136 if (isofn != isoend) {
137 isofn += isochar(isofn, isoend, joliet_level, &c);
138 switch (c) {
139 default:
140 return -1;
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
157 */
158 void
159 isofntrans(infn, infnlen, outfn, outfnlen, original, casetrans, assoc, joliet_level)
160 u_char *infn, *outfn;
161 int infnlen;
162 u_short *outfnlen;
163 int original;
164 int casetrans;
165 int assoc;
166 int joliet_level;
167 {
168 int fnidx = 0;
169 u_char *infnend = infn + infnlen;
170
171 if (assoc) {
172 *outfn++ = ASSOCCHAR;
173 fnidx++;
174 }
175 for (; infn != infnend; fnidx++) {
176 char c;
177
178 infn += isochar(infn, infnend, joliet_level, &c);
179
180 if (casetrans && joliet_level == 0 && c >= 'A' && c <= 'Z')
181 *outfn++ = c + ('a' - 'A');
182 else if (!original && c == ';') {
183 if (fnidx > 0 && outfn[-1] == '.')
184 fnidx--;
185 break;
186 } else
187 *outfn++ = c;
188 }
189 *outfnlen = fnidx;
190 }
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