cd9660_util.c revision 22593 
175584Sru/*-
275584Sru * Copyright (c) 1994
375584Sru *	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).
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the University of
21 *	California, Berkeley and its contributors.
22 * 4. 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 * $FreeBSD: head/sys/fs/cd9660/cd9660_util.c 22593 1997-02-12 14:07:26Z bde $
40 */
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/conf.h>
52#include <sys/mount.h>
53#include <sys/vnode.h>
54#include <miscfs/specfs/specdev.h> /* XXX */
55#include <miscfs/fifofs/fifo.h> /* XXX */
56#include <sys/malloc.h>
57#include <sys/dir.h>
58
59#include <isofs/cd9660/iso.h>
60
61/*
62 * translate and compare a filename
63 * Note: Version number plus ';' may be omitted.
64 */
65int
66isofncmp(fn, fnlen, isofn, isolen)
67	u_char *fn;
68	int fnlen;
69	u_char *isofn;
70	int isolen;
71{
72	int i, j;
73	unsigned char c;
74
75	while (--fnlen >= 0) {
76		if (--isolen < 0)
77			return *fn;
78		if ((c = *isofn++) == ';') {
79			switch (*fn++) {
80			default:
81				return *--fn;
82			case 0:
83				return 0;
84			case ';':
85				break;
86			}
87			for (i = 0; --fnlen >= 0; i = i * 10 + *fn++ - '0') {
88				if (*fn < '0' || *fn > '9') {
89					return -1;
90				}
91			}
92			for (j = 0; --isolen >= 0; j = j * 10 + *isofn++ - '0');
93			return i - j;
94		}
95		if (c != *fn) {
96			if (c >= 'A' && c <= 'Z') {
97				if (c + ('a' - 'A') != *fn) {
98					if (*fn >= 'a' && *fn <= 'z')
99						return *fn - ('a' - 'A') - c;
100					else
101						return *fn - c;
102				}
103			} else
104				return *fn - c;
105		}
106		fn++;
107	}
108	if (isolen > 0) {
109		switch (*isofn) {
110		default:
111			return -1;
112		case '.':
113			if (isofn[1] != ';')
114				return -1;
115		case ';':
116			return 0;
117		}
118	}
119	return 0;
120}
121
122/*
123 * translate a filename
124 */
125void
126isofntrans(infn, infnlen, outfn, outfnlen, original, assoc)
127	u_char *infn;
128	int infnlen;
129	u_char *outfn;
130	u_short *outfnlen;
131	int original;
132	int assoc;
133{
134	int fnidx = 0;
135
136	if (assoc) {
137		*outfn++ = ASSOCCHAR;
138		fnidx++;
139		infnlen++;
140	}
141	for (; fnidx < infnlen; fnidx++) {
142		char c = *infn++;
143
144		if (!original && c >= 'A' && c <= 'Z')
145			*outfn++ = c + ('a' - 'A');
146		else if (!original && c == '.' && *infn == ';')
147			break;
148		else if (!original && c == ';')
149			break;
150		else
151			*outfn++ = c;
152	}
153	*outfnlen = fnidx;
154}
155