cd9660_util.c revision 45773 
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 * $Id: cd9660_util.c,v 1.10 1997/04/10 14:35:11 bde 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 * Get one character out of an iso filename
51 * Obey joliet_level
52 * Return number of bytes consumed
53 */
54int
55isochar(isofn, isoend, joliet_level, c)
56      u_char *isofn;
57      u_char *isoend;
58      int joliet_level;
59      u_char *c;
60{
61      *c = *isofn++;
62      if (joliet_level == 0 || isofn == isoend)
63              /* (00) and (01) are one byte in Joliet, too */
64              return 1;
65
66      /* No Unicode support yet :-( */
67      switch (*c) {
68      default:
69              *c = '?';
70              break;
71      case '\0':
72              *c = *isofn;
73              break;
74      }
75      return 2;
76}
77
78/*
79 * translate and compare a filename
80 * returns (fn - isofn)
81 * Note: Version number plus ';' may be omitted.
82 */
83int
84isofncmp(fn, fnlen, isofn, isolen, joliet_level)
85	u_char *fn;
86	int fnlen;
87	u_char *isofn;
88	int isolen;
89	int joliet_level;
90{
91	int i, j;
92	u_char c, *fnend = fn + fnlen, *isoend = isofn + isolen;
93
94	for (; fn != fnend; fn++) {
95		if (isofn == isoend)
96			return *fn;
97		isofn += isochar(isofn, isoend, joliet_level, &c);
98		if (c == ';') {
99			if (*fn++ != ';')
100				return fn[-1];
101			for (i = 0; fn != fnend; i = i * 10 + *fn++ - '0') {
102				if (*fn < '0' || *fn > '9') {
103					return -1;
104				}
105			}
106			for (j = 0; isofn != isoend; j = j * 10 + c - '0')
107				isofn += isochar(isofn, isoend,
108						 joliet_level, &c);
109			return i - j;
110		}
111		if (c != *fn) {
112			if (c >= 'A' && c <= 'Z') {
113				if (c + ('a' - 'A') != *fn) {
114					if (*fn >= 'a' && *fn <= 'z')
115						return *fn - ('a' - 'A') - c;
116					else
117						return *fn - c;
118				}
119			} else
120				return *fn - c;
121		}
122	}
123	if (isofn != isoend) {
124		isofn += isochar(isofn, isoend, joliet_level, &c);
125		switch (c) {
126		default:
127			return -c;
128		case '.':
129			if (isofn != isoend) {
130				isochar(isofn, isoend, joliet_level, &c);
131				if (c == ';')
132					return 0;
133			}
134			return -1;
135		case ';':
136			return 0;
137		}
138	}
139	return 0;
140}
141
142/*
143 * translate a filename of length > 0
144 */
145void
146isofntrans(infn, infnlen, outfn, outfnlen, original, assoc, joliet_level)
147	u_char *infn;
148	int infnlen;
149	u_char *outfn;
150	u_short *outfnlen;
151	int original;
152	int assoc;
153	int joliet_level;
154{
155	int fnidx = 0;
156	u_char c, d = '\0', *infnend = infn + infnlen;
157
158	if (assoc) {
159		*outfn++ = ASSOCCHAR;
160		fnidx++;
161	}
162	for (; infn != infnend; fnidx++) {
163		infn += isochar(infn, infnend, joliet_level, &c);
164
165		if (!original && c >= 'A' && c <= 'Z')
166			*outfn++ = c + ('a' - 'A');
167		else if (!original && c == ';') {
168			fnidx -= (d == '.');
169			break;
170		} else
171			*outfn++ = c;
172		d = c;
173	}
174	*outfnlen = fnidx;
175}
176