Annotation of sys/isofs/cd9660/cd9660_util.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: cd9660_util.c,v 1.7 2003/11/04 21:54:01 mickey 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. Neither the name of the University nor the names of its contributors
23: * may be used to endorse or promote products derived from this software
24: * without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36: * SUCH DAMAGE.
37: *
38: * @(#)cd9660_util.c 8.3 (Berkeley) 12/5/94
39: */
40:
41: #include <sys/param.h>
42: #include <sys/systm.h>
43: #include <sys/namei.h>
44: #include <sys/resourcevar.h>
45: #include <sys/kernel.h>
46: #include <sys/file.h>
47: #include <sys/stat.h>
48: #include <sys/buf.h>
49: #include <sys/proc.h>
50: #include <sys/conf.h>
51: #include <sys/mount.h>
52: #include <sys/vnode.h>
53: #include <sys/malloc.h>
54: #include <sys/dirent.h>
55:
56: #include <isofs/cd9660/iso.h>
57: #include <isofs/cd9660/cd9660_extern.h>
58:
59: /*
60: * XXX: limited support for loading of Unicode
61: * conversion routine as a kld at a run-time.
62: * Should be removed when native Unicode kernel
63: * interfaces have been introduced.
64: */
65: u_char (*cd9660_wchar2char)(u_int32_t wchar) = NULL;
66:
67: /*
68: * Get one character out of an iso filename
69: * Obey joliet_level
70: * Return number of bytes consumed
71: */
72: int
73: isochar(isofn, isoend, joliet_level, c)
74: const u_char *isofn;
75: const u_char *isoend;
76: int joliet_level;
77: u_char *c;
78: {
79: *c = *isofn++;
80: if (joliet_level == 0 || isofn == isoend)
81: /* (00) and (01) are one byte in Joliet, too */
82: return 1;
83:
84: /* No Unicode support yet :-( */
85: switch (*c) {
86: default:
87: *c = '?';
88: break;
89: case '\0':
90: *c = *isofn;
91: break;
92: }
93:
94: /* XXX: if Unicode conversion routine is loaded then use it */
95: if (cd9660_wchar2char != NULL)
96: *c = cd9660_wchar2char((*(isofn - 1) << 8) | *isofn);
97:
98: return 2;
99: }
100:
101: /*
102: * translate and compare a filename
103: * returns (fn - isofn)
104: * Note: Version number plus ';' may be omitted.
105: */
106: int
107: isofncmp(fn, fnlen, isofn, isolen, joliet_level)
108: const u_char *fn, *isofn;
109: int fnlen, isolen, joliet_level;
110: {
111: int i, j;
112: u_char c;
113: const u_char *fnend = fn + fnlen, *isoend = isofn + isolen;
114:
115: for (; fn != fnend; fn++) {
116: if (isofn == isoend)
117: return *fn;
118: isofn += isochar(isofn, isoend, joliet_level, &c);
119: if (c == ';') {
120: if (*fn++ != ';')
121: return fn[-1];
122: for (i = 0; fn != fnend; i = i * 10 + *fn++ - '0') {
123: if (*fn < '0' || *fn > '9') {
124: return -1;
125: }
126: }
127: for (j = 0; isofn != isoend; j = j * 10 + c - '0')
128: isofn += isochar(isofn, isoend,
129: joliet_level, &c);
130: return i - j;
131: }
132: if (((u_char) c) != *fn) {
133: if (c >= 'A' && c <= 'Z') {
134: if (c + ('a' - 'A') != *fn) {
135: if (*fn >= 'a' && *fn <= 'z')
136: return *fn - ('a' - 'A') - c;
137: else
138: return *fn - c;
139: }
140: } else
141: return *fn - c;
142: }
143: }
144: if (isofn != isoend) {
145: isofn += isochar(isofn, isoend, joliet_level, &c);
146: switch (c) {
147: default:
148: return -c;
149: case '.':
150: if (isofn != isoend) {
151: isochar(isofn, isoend, joliet_level, &c);
152: if (c == ';')
153: return 0;
154: }
155: return -1;
156: case ';':
157: return 0;
158: }
159: }
160: return 0;
161: }
162:
163: /*
164: * translate a filename of length > 0
165: */
166: void
167: isofntrans(infn, infnlen, outfn, outfnlen, original, assoc, joliet_level)
168: u_char *infn, *outfn;
169: int infnlen;
170: u_short *outfnlen;
171: int original;
172: int assoc;
173: int joliet_level;
174: {
175: int fnidx = 0;
176: u_char c, d = '\0', *infnend = infn + infnlen;
177:
178: if (assoc) {
179: *outfn++ = ASSOCCHAR;
180: fnidx++;
181: }
182: for (; infn != infnend; fnidx++) {
183: infn += isochar(infn, infnend, joliet_level, &c);
184:
185: if (!original && c == ';') {
186: fnidx -= (d == '.');
187: break;
188: } else
189: *outfn++ = c;
190: d = c;
191: }
192: *outfnlen = fnidx;
193: }
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