1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
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). Joliet support was added by
11 * Joachim Kuebart (joki@kuebart.stuttgart.netsurf.de).
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * @(#)cd9660_util.c 8.3 (Berkeley) 12/5/94
38 */
39
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
42
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/mount.h>
46 #include <sys/vnode.h>
47 #include <sys/iconv.h>
48
49 #include <fs/cd9660/iso.h>
50 #include <fs/cd9660/cd9660_mount.h>
51
52 extern struct iconv_functions *cd9660_iconv;
53
54 /*
55 * Get one character out of an iso filename
56 * Obey joliet_level
57 * Return number of bytes consumed
58 */
59 int
60 isochar(isofn, isoend, joliet_level, c, clen, flags, handle)
61 u_char *isofn;
62 u_char *isoend;
63 int joliet_level;
64 u_short *c;
65 int *clen;
66 int flags;
67 void *handle;
68 {
69 size_t i, j, len;
70 char inbuf[3], outbuf[3], *inp, *outp;
71
72 *c = *isofn++;
73 if (clen) *clen = 1;
74 if (joliet_level == 0 || isofn == isoend)
75 /* (00) and (01) are one byte in Joliet, too */
76 return 1;
77
78 if (flags & ISOFSMNT_KICONV && cd9660_iconv) {
79 i = j = len = 2;
80 inbuf[0]=(char)*(isofn - 1);
81 inbuf[1]=(char)*isofn;
82 inbuf[2]='\0';
83 inp = inbuf;
84 outp = outbuf;
85 cd9660_iconv->convchr(handle, __DECONST(const char **, &inp), &i,
86 &outp, &j);
87 len -= j;
88 if (clen) *clen = len;
89 *c = '\0';
90 while(len--)
91 *c |= (*(outp - len - 1) & 0xff) << (len << 3);
92 } else {
93 switch (*c) {
94 default:
95 *c = '?';
96 break;
97 case '\0':
98 *c = *isofn;
99 break;
100 }
101 }
102
103 return 2;
104 }
105
106 /*
107 * translate and compare a filename
108 * returns (fn - isofn)
109 * Note: Version number plus ';' may be omitted.
110 */
111 int
112 isofncmp(fn, fnlen, isofn, isolen, joliet_level, flags, handle, lhandle)
113 u_char *fn;
114 int fnlen;
115 u_char *isofn;
116 int isolen;
117 int joliet_level;
118 int flags;
119 void *handle;
120 void *lhandle;
121 {
122 int i, j;
123 u_short c, d;
124 u_char *fnend = fn + fnlen, *isoend = isofn + isolen;
125
126 for (; fn < fnend; ) {
127 d = sgetrune(fn, fnend - fn, __DECONST(const char **, &fn),
128 flags, lhandle);
129 if (isofn == isoend)
130 return d;
131 isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle);
132 if (c == ';') {
133 if (d != ';')
134 return d;
135 for (i = 0; fn < fnend; i = i * 10 + *fn++ - '') {
136 if (*fn < '' || *fn > '9') {
137 return -1;
138 }
139 }
140 for (j = 0; isofn != isoend; j = j * 10 + c - '')
141 isofn += isochar(isofn, isoend,
142 joliet_level, &c,
143 NULL, flags, handle);
144 return i - j;
145 }
146 if (c != d) {
147 if (c >= 'A' && c <= 'Z') {
148 if (c + ('a' - 'A') != d) {
149 if (d >= 'a' && d <= 'z')
150 return d - ('a' - 'A') - c;
151 else
152 return d - c;
153 }
154 } else
155 return d - c;
156 }
157 }
158 if (isofn != isoend) {
159 isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle);
160 switch (c) {
161 default:
162 return -c;
163 case '.':
164 if (isofn != isoend) {
165 isochar(isofn, isoend, joliet_level, &c,
166 NULL, flags, handle);
167 if (c == ';')
168 return 0;
169 }
170 return -1;
171 case ';':
172 return 0;
173 }
174 }
175 return 0;
176 }
177
178 /*
179 * translate a filename of length > 0
180 */
181 void
182 isofntrans(infn, infnlen, outfn, outfnlen, original, assoc, joliet_level, flags, handle)
183 u_char *infn;
184 int infnlen;
185 u_char *outfn;
186 u_short *outfnlen;
187 int original;
188 int assoc;
189 int joliet_level;
190 int flags;
191 void *handle;
192 {
193 u_short c, d = '\0';
194 u_char *outp = outfn, *infnend = infn + infnlen;
195 int clen;
196
197 if (assoc) {
198 *outp++ = ASSOCCHAR;
199 }
200 for (; infn != infnend; ) {
201 infn += isochar(infn, infnend, joliet_level, &c, &clen, flags, handle);
202
203 if (!original && !joliet_level && c >= 'A' && c <= 'Z')
204 c += ('a' - 'A');
205 else if (!original && c == ';') {
206 outp -= (d == '.');
207 break;
208 }
209 d = c;
210 while(clen--)
211 *outp++ = c >> (clen << 3);
212 }
213 *outfnlen = outp - outfn;
214 }
215
216 /*
217 * same as sgetrune(3)
218 */
219 u_short
220 sgetrune(string, n, result, flags, handle)
221 const char *string;
222 size_t n;
223 char const **result;
224 int flags;
225 void *handle;
226 {
227 size_t i, j, len;
228 char outbuf[3], *outp;
229 u_short c = '\0';
230
231 len = i = (n < 2) ? n : 2;
232 j = 2;
233 outp = outbuf;
234
235 if (flags & ISOFSMNT_KICONV && cd9660_iconv) {
236 cd9660_iconv->convchr(handle, (const char **)&string,
237 &i, &outp, &j);
238 len -= i;
239 } else {
240 len = 1;
241 string++;
242 }
243
244 if (result) *result = string;
245 while(len--) c |= (*(string - len - 1) & 0xff) << (len << 3);
246 return (c);
247 }
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