Annotation of src/sys/fs/cd9660/iso.h, Revision 1.4
1.4 ! perry 1: /* $NetBSD: iso.h,v 1.3 2004/11/30 21:36:28 martin Exp $ */
1.1 jdolecek 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.
1.2 agc 20: * 3. Neither the name of the University nor the names of its contributors
1.1 jdolecek 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: * @(#)iso.h 8.6 (Berkeley) 5/10/95
37: */
38:
39: /*
40: * Definitions describing ISO9660 file system structure, as well as
41: * the functions necessary to access fields of ISO9660 file system
42: * structures.
43: */
44:
45: #define ISODCL(from, to) (to - from + 1)
46:
47: struct iso_volume_descriptor {
48: char type[ISODCL(1,1)]; /* 711 */
49: char id[ISODCL(2,6)];
50: char version[ISODCL(7,7)];
51: char data[ISODCL(8,2048)];
52: };
53:
54: /* volume descriptor types */
55: #define ISO_VD_PRIMARY 1
56: #define ISO_VD_SUPPLEMENTARY 2
57: #define ISO_VD_END 255
58:
59: #define ISO_STANDARD_ID "CD001"
60: #define ISO_ECMA_ID "CDW01"
61:
62: struct iso_primary_descriptor {
63: char type [ISODCL ( 1, 1)]; /* 711 */
64: char id [ISODCL ( 2, 6)];
65: char version [ISODCL ( 7, 7)]; /* 711 */
66: char unused1 [ISODCL ( 8, 8)];
67: char system_id [ISODCL ( 9, 40)]; /* achars */
68: char volume_id [ISODCL ( 41, 72)]; /* dchars */
69: char unused2 [ISODCL ( 73, 80)];
70: char volume_space_size [ISODCL ( 81, 88)]; /* 733 */
71: char unused3 [ISODCL ( 89, 120)];
72: char volume_set_size [ISODCL (121, 124)]; /* 723 */
73: char volume_sequence_number [ISODCL (125, 128)]; /* 723 */
74: char logical_block_size [ISODCL (129, 132)]; /* 723 */
75: char path_table_size [ISODCL (133, 140)]; /* 733 */
76: char type_l_path_table [ISODCL (141, 144)]; /* 731 */
77: char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */
78: char type_m_path_table [ISODCL (149, 152)]; /* 732 */
79: char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */
80: char root_directory_record [ISODCL (157, 190)]; /* 9.1 */
81: char volume_set_id [ISODCL (191, 318)]; /* dchars */
82: char publisher_id [ISODCL (319, 446)]; /* achars */
83: char preparer_id [ISODCL (447, 574)]; /* achars */
84: char application_id [ISODCL (575, 702)]; /* achars */
85: char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */
86: char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */
87: char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */
88: char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */
89: char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */
90: char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */
91: char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */
92: char file_structure_version [ISODCL (882, 882)]; /* 711 */
93: char unused4 [ISODCL (883, 883)];
94: char application_data [ISODCL (884, 1395)];
95: char unused5 [ISODCL (1396, 2048)];
96: };
97: #define ISO_DEFAULT_BLOCK_SIZE 2048
98:
99: struct iso_supplementary_descriptor {
100: char type [ISODCL ( 1, 1)]; /* 711 */
101: char id [ISODCL ( 2, 6)];
102: char version [ISODCL ( 7, 7)]; /* 711 */
103: char flags [ISODCL ( 8, 8)]; /* 711? */
104: char system_id [ISODCL ( 9, 40)]; /* achars */
105: char volume_id [ISODCL ( 41, 72)]; /* dchars */
106: char unused2 [ISODCL ( 73, 80)];
107: char volume_space_size [ISODCL ( 81, 88)]; /* 733 */
108: char escape [ISODCL ( 89, 120)];
109: char volume_set_size [ISODCL (121, 124)]; /* 723 */
110: char volume_sequence_number [ISODCL (125, 128)]; /* 723 */
111: char logical_block_size [ISODCL (129, 132)]; /* 723 */
112: char path_table_size [ISODCL (133, 140)]; /* 733 */
113: char type_l_path_table [ISODCL (141, 144)]; /* 731 */
114: char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */
115: char type_m_path_table [ISODCL (149, 152)]; /* 732 */
116: char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */
117: char root_directory_record [ISODCL (157, 190)]; /* 9.1 */
118: char volume_set_id [ISODCL (191, 318)]; /* dchars */
119: char publisher_id [ISODCL (319, 446)]; /* achars */
120: char preparer_id [ISODCL (447, 574)]; /* achars */
121: char application_id [ISODCL (575, 702)]; /* achars */
122: char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */
123: char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */
124: char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */
125: char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */
126: char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */
127: char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */
128: char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */
129: char file_structure_version [ISODCL (882, 882)]; /* 711 */
130: char unused4 [ISODCL (883, 883)];
131: char application_data [ISODCL (884, 1395)];
132: char unused5 [ISODCL (1396, 2048)];
133: };
134:
135: struct iso_directory_record {
136: char length [ISODCL (1, 1)]; /* 711 */
137: char ext_attr_length [ISODCL (2, 2)]; /* 711 */
138: u_char extent [ISODCL (3, 10)]; /* 733 */
139: u_char size [ISODCL (11, 18)]; /* 733 */
140: char date [ISODCL (19, 25)]; /* 7 by 711 */
141: char flags [ISODCL (26, 26)];
142: char file_unit_size [ISODCL (27, 27)]; /* 711 */
143: char interleave [ISODCL (28, 28)]; /* 711 */
144: char volume_sequence_number [ISODCL (29, 32)]; /* 723 */
145: char name_len [ISODCL (33, 33)]; /* 711 */
146: char name [1]; /* XXX */
147: };
148: /* can't take sizeof(iso_directory_record), because of possible alignment
149: of the last entry (34 instead of 33) */
150: #define ISO_DIRECTORY_RECORD_SIZE 33
151:
152: struct iso_extended_attributes {
153: u_char owner [ISODCL (1, 4)]; /* 723 */
154: u_char group [ISODCL (5, 8)]; /* 723 */
155: u_char perm [ISODCL (9, 10)]; /* 9.5.3 */
156: char ctime [ISODCL (11, 27)]; /* 8.4.26.1 */
157: char mtime [ISODCL (28, 44)]; /* 8.4.26.1 */
158: char xtime [ISODCL (45, 61)]; /* 8.4.26.1 */
159: char ftime [ISODCL (62, 78)]; /* 8.4.26.1 */
160: char recfmt [ISODCL (79, 79)]; /* 711 */
161: char recattr [ISODCL (80, 80)]; /* 711 */
162: u_char reclen [ISODCL (81, 84)]; /* 723 */
163: char system_id [ISODCL (85, 116)]; /* achars */
164: char system_use [ISODCL (117, 180)];
165: char version [ISODCL (181, 181)]; /* 711 */
166: char len_esc [ISODCL (182, 182)]; /* 711 */
167: char reserved [ISODCL (183, 246)];
168: u_char len_au [ISODCL (247, 250)]; /* 723 */
169: };
170:
171: static __inline int isonum_711 __P((u_char *)) __attribute__ ((unused));
1.3 martin 172: static __inline int isonum_712 __P((signed char *)) __attribute__ ((unused));
173: static __inline uint16_t isonum_721 __P((u_char *)) __attribute__ ((unused));
174: static __inline uint16_t isonum_722 __P((u_char *)) __attribute__ ((unused));
175: static __inline uint16_t isonum_723 __P((u_char *)) __attribute__ ((unused));
176: static __inline uint32_t isonum_731 __P((u_char *)) __attribute__ ((unused));
177: static __inline uint32_t isonum_732 __P((u_char *)) __attribute__ ((unused));
178: static __inline uint32_t isonum_733 __P((u_char *)) __attribute__ ((unused));
1.1 jdolecek 179:
180: /* 7.1.1: unsigned char */
181: static __inline int
182: #if __STDC__
183: isonum_711(u_char *p)
184: #else
185: isonum_711(p)
186: u_char *p;
187: #endif
188: {
189: return *p;
190: }
191:
192: /* 7.1.2: signed(?) char */
193: static __inline int
194: #if __STDC__
1.3 martin 195: isonum_712(signed char *p)
1.1 jdolecek 196: #else
197: isonum_712(p)
1.3 martin 198: signed char *p;
1.1 jdolecek 199: #endif
200: {
201: return *p;
202: }
203:
204: /* 7.2.1: unsigned little-endian 16-bit value. NOT USED IN KERNEL. */
1.3 martin 205: static __inline uint16_t
1.1 jdolecek 206: isonum_721(p)
207: u_char *p;
208: {
209: #if defined(UNALIGNED_ACCESS) && (BYTE_ORDER == LITTLE_ENDIAN)
1.3 martin 210: return *(uint16_t *)p;
1.1 jdolecek 211: #else
212: return *p|((char)p[1] << 8);
213: #endif
214: }
215:
216: /* 7.2.2: unsigned big-endian 16-bit value. NOT USED IN KERNEL. */
1.3 martin 217: static __inline uint16_t
1.1 jdolecek 218: isonum_722(p)
219: unsigned char *p;
220: {
221: #if defined(UNALIGNED_ACCESS) && (BYTE_ORDER == BIG_ENDIAN)
1.3 martin 222: return *(uint16_t *)p;
1.1 jdolecek 223: #else
224: return ((char)*p << 8)|p[1];
225: #endif
1.4 ! perry 226: }
1.1 jdolecek 227:
228: /* 7.2.3: unsigned both-endian (little, then big) 16-bit value */
1.3 martin 229: static __inline uint16_t
1.1 jdolecek 230: #if __STDC__
231: isonum_723(u_char *p)
232: #else
233: isonum_723(p)
234: u_char *p;
235: #endif
236: {
237: #if defined(UNALIGNED_ACCESS) && \
238: ((BYTE_ORDER == LITTLE_ENDIAN) || (BYTE_ORDER == BIG_ENDIAN))
239: #if BYTE_ORDER == LITTLE_ENDIAN
1.3 martin 240: return *(uint16_t *)p;
1.1 jdolecek 241: #else
1.3 martin 242: return *(uint16_t *)(p + 2);
1.1 jdolecek 243: #endif
244: #else /* !UNALIGNED_ACCESS or weird byte order */
245: return *p|(p[1] << 8);
246: #endif
247: }
248:
249: /* 7.3.1: unsigned little-endian 32-bit value. NOT USED IN KERNEL. */
1.3 martin 250: static __inline uint32_t
1.1 jdolecek 251: isonum_731(p)
252: u_char *p;
253: {
254: #if defined(UNALIGNED_ACCESS) && (BYTE_ORDER == LITTLE_ENDIAN)
1.3 martin 255: return *(uint32_t *)p;
1.1 jdolecek 256: #else
257: return *p|(p[1] << 8)|(p[2] << 16)|(p[3] << 24);
258: #endif
259: }
260:
261: /* 7.3.2: unsigned big-endian 32-bit value. NOT USED IN KERNEL. */
1.3 martin 262: static __inline uint32_t
1.1 jdolecek 263: isonum_732(p)
264: unsigned char *p;
265: {
266: #if defined(UNALIGNED_ACCESS) && (BYTE_ORDER == BIG_ENDIAN)
1.3 martin 267: return *(uint32_t *)p;
1.1 jdolecek 268: #else
269: return (*p << 24)|(p[1] << 16)|(p[2] << 8)|p[3];
270: #endif
271: }
272:
273: /* 7.3.3: unsigned both-endian (little, then big) 32-bit value */
1.3 martin 274: static __inline uint32_t
1.1 jdolecek 275: #if __STDC__
276: isonum_733(u_char *p)
277: #else
278: isonum_733(p)
279: u_char *p;
280: #endif
281: {
282: #if defined(UNALIGNED_ACCESS) && \
283: ((BYTE_ORDER == LITTLE_ENDIAN) || (BYTE_ORDER == BIG_ENDIAN))
284: #if BYTE_ORDER == LITTLE_ENDIAN
1.3 martin 285: return *(uint32_t *)p;
1.1 jdolecek 286: #else
1.3 martin 287: return *(uint32_t *)(p + 4);
1.1 jdolecek 288: #endif
289: #else /* !UNALIGNED_ACCESS or weird byte order */
290: return *p|(p[1] << 8)|(p[2] << 16)|(p[3] << 24);
291: #endif
292: }
293:
294: /*
295: * Associated files have a leading '='.
296: */
297: #define ASSOCCHAR '='
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