2 * This file has been modified for the cdrkit suite.
4 * The behaviour and appearence of the program code below can differ to a major
5 * extent from the version distributed by the original author(s).
7 * For details, see Changelog file distributed with the cdrkit package. If you
8 * received this file from another source then ask the distributing person for
9 * a log of modifications.
13 /* @(#)data.c 1.5 02/02/10 joerg */
15 * hfsutils - tools for reading and writing Macintosh HFS volumes
16 * Copyright (C) 1996, 1997 Robert Leslie
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation; either version 2 of the License, or
21 * (at your option) any later version.
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
43 * Depending on the version, AppleDouble/Single stores dates
44 * relative to 1st Jan 1904 (v1) or 1st Jan 2000 (v2)
46 * DUTDIFF is the difference between 1st Jan 2000 and
47 * 1st Jan 1970 (Unix epoch)).
50 #define DUTDIFF 946684800L
51 #endif /* APPLE_HYB */
52 #define MUTDIFF 2082844800L
53 #define TZNONE 0x0FFFFFFFL /* A timezone diff that cannot occur */
55 static void calctzdiff(void);
58 unsigned long tzdiff = TZNONE;
61 unsigned char hfs_charorder[256] = {
62 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
63 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
64 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
65 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
67 0x20, 0x22, 0x23, 0x28, 0x29, 0x2a, 0x2b, 0x2c,
68 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
69 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e,
70 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46,
72 0x47, 0x48, 0x58, 0x5a, 0x5e, 0x60, 0x67, 0x69,
73 0x6b, 0x6d, 0x73, 0x75, 0x77, 0x79, 0x7b, 0x7f,
74 0x8d, 0x8f, 0x91, 0x93, 0x96, 0x98, 0x9f, 0xa1,
75 0xa3, 0xa5, 0xa8, 0xaa, 0xab, 0xac, 0xad, 0xae,
77 0x54, 0x48, 0x58, 0x5a, 0x5e, 0x60, 0x67, 0x69,
78 0x6b, 0x6d, 0x73, 0x75, 0x77, 0x79, 0x7b, 0x7f,
79 0x8d, 0x8f, 0x91, 0x93, 0x96, 0x98, 0x9f, 0xa1,
80 0xa3, 0xa5, 0xa8, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3,
82 0x4c, 0x50, 0x5c, 0x62, 0x7d, 0x81, 0x9a, 0x55,
83 0x4a, 0x56, 0x4c, 0x4e, 0x50, 0x5c, 0x62, 0x64,
84 0x65, 0x66, 0x6f, 0x70, 0x71, 0x72, 0x7d, 0x89,
85 0x8a, 0x8b, 0x81, 0x83, 0x9c, 0x9d, 0x9e, 0x9a,
87 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0x95,
88 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0x52, 0x85,
89 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8,
90 0xc9, 0xca, 0xcb, 0x57, 0x8c, 0xcc, 0x52, 0x85,
92 0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0x26,
93 0x27, 0xd4, 0x20, 0x4a, 0x4e, 0x83, 0x87, 0x87,
94 0xd5, 0xd6, 0x24, 0x25, 0x2d, 0x2e, 0xd7, 0xd8,
95 0xa7, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
97 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
98 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
99 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
100 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
105 * DESCRIPTION: marshal 1 byte into local host format
107 char d_getb(unsigned char *ptr)
109 return (char) ptr[0];
114 * DESCRIPTION: marshal 2 bytes into local host format
116 short d_getw(unsigned char *ptr)
125 * DESCRIPTION: marshal 4 bytes into local host format
127 long d_getl(unsigned char *ptr)
138 * DESCRIPTION: marshal 1 byte out to Macintosh (big-endian) format
141 void d_putb(unsigned char *ptr, char data)
143 void d_putb(unsigned char *ptr, char data)
146 ptr[0] = (unsigned char) data;
151 * DESCRIPTION: marshal 2 bytes out to Macintosh (big-endian) format
154 void d_putw(unsigned char *ptr, short data)
156 void d_putw(unsigned char *ptr, short data)
159 ptr[0] = ((unsigned) data & 0xff00) >> 8;
160 ptr[1] = ((unsigned) data & 0x00ff) >> 0;
165 * DESCRIPTION: marshal 4 bytes out to Macintosh (big-endian) format
167 void d_putl(unsigned char *ptr, long data)
169 ptr[0] = ((unsigned long) data & 0xff000000) >> 24;
170 ptr[1] = ((unsigned long) data & 0x00ff0000) >> 16;
171 ptr[2] = ((unsigned long) data & 0x0000ff00) >> 8;
172 ptr[3] = ((unsigned long) data & 0x000000ff) >> 0;
176 * NAME: data->fetchb()
177 * DESCRIPTION: incrementally retrieve a byte of data
179 void d_fetchb(unsigned char **ptr, char *dest)
181 *dest = d_getb(*ptr);
186 * NAME: data->fetchw()
187 * DESCRIPTION: incrementally retrieve a word of data
189 void d_fetchw(unsigned char **ptr, short *dest)
191 *dest = d_getw(*ptr);
196 * NAME: data->fetchl()
197 * DESCRIPTION: incrementally retrieve a long word of data
199 void d_fetchl(unsigned char **ptr, long *dest)
201 *dest = d_getl(*ptr);
206 * NAME: data->fetchs()
207 * DESCRIPTION: incrementally retrieve a string
209 void d_fetchs(unsigned char **ptr, char *dest, int size)
214 d_fetchb(ptr, &blen);
217 if (len > 0 && len < size)
218 memcpy(dest, *ptr, len);
228 * NAME: data->storeb()
229 * DESCRIPTION: incrementally store a byte of data
232 void d_storeb(unsigned char **ptr, char data)
234 void d_storeb(unsigned char **ptr, char data)
242 * NAME: data->storew()
243 * DESCRIPTION: incrementally store a word of data
246 void d_storew(unsigned char **ptr, short data)
248 void d_storew(unsigned char **ptr, short data)
256 * NAME: data->storel()
257 * DESCRIPTION: incrementally store a long word of data
259 void d_storel(unsigned char **ptr, long data)
266 * NAME: data->stores()
267 * DESCRIPTION: incrementally store a string
269 void d_stores(unsigned char **ptr, char *src, int size)
277 d_storeb(ptr, (unsigned char) len);
279 memcpy(*ptr, src, len);
280 memset(*ptr + len, 0, size - len);
287 * DESCRIPTION: calculate the timezone difference between local time and UTC
289 static void calctzdiff()
296 isdst = localtime(&t)->tm_isdst;
304 tzdiff = t - mktime(&tm);
311 * NAME: data->tomtime()
312 * DESCRIPTION: convert UNIX time to Macintosh time
314 unsigned long d_tomtime(unsigned long secs)
318 if (tzdiff == TZNONE)
321 return utime + tzdiff + MUTDIFF;
325 * NAME: data->toutime()
326 * DESCRIPTION: convert Macintosh time to UNIX time
328 unsigned long d_toutime(unsigned long secs)
332 if (tzdiff == TZNONE)
335 return utime - MUTDIFF - tzdiff;
340 * NAME: data->dtoutime()
341 * DESCRIPTION: convert Apple Double v2 time to UNIX time
343 unsigned long d_dtoutime(long secs)
347 if (tzdiff == TZNONE)
350 return utime + DUTDIFF - tzdiff;
352 #endif /* APPLE_HYB */
355 * NAME: data->relstring()
356 * DESCRIPTION: compare two strings as per MacOS for HFS
358 int d_relstring(char *str1, char *str2)
362 while (*str1 && *str2)
364 diff = hfs_charorder[(unsigned char) *str1] -
365 hfs_charorder[(unsigned char) *str2];
373 if (! *str1 && *str2)
375 else if (*str1 && ! *str2)