xref: /openbsd-src/gnu/usr.sbin/mkhybrid/src/libhfs_iso/data.c (revision f0d9efc08bdf8f314c206a5c81ebc300245394f8)
1*f0d9efc0Sbeck /*
2*f0d9efc0Sbeck  * hfsutils - tools for reading and writing Macintosh HFS volumes
3*f0d9efc0Sbeck  * Copyright (C) 1996, 1997 Robert Leslie
4*f0d9efc0Sbeck  *
5*f0d9efc0Sbeck  * This program is free software; you can redistribute it and/or modify
6*f0d9efc0Sbeck  * it under the terms of the GNU General Public License as published by
7*f0d9efc0Sbeck  * the Free Software Foundation; either version 2 of the License, or
8*f0d9efc0Sbeck  * (at your option) any later version.
9*f0d9efc0Sbeck  *
10*f0d9efc0Sbeck  * This program is distributed in the hope that it will be useful,
11*f0d9efc0Sbeck  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12*f0d9efc0Sbeck  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13*f0d9efc0Sbeck  * GNU General Public License for more details.
14*f0d9efc0Sbeck  *
15*f0d9efc0Sbeck  * You should have received a copy of the GNU General Public License
16*f0d9efc0Sbeck  * along with this program; if not, write to the Free Software
17*f0d9efc0Sbeck  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18*f0d9efc0Sbeck  */
19*f0d9efc0Sbeck 
20*f0d9efc0Sbeck # include <string.h>
21*f0d9efc0Sbeck # include <time.h>
22*f0d9efc0Sbeck 
23*f0d9efc0Sbeck # include "internal.h"
24*f0d9efc0Sbeck # include "data.h"
25*f0d9efc0Sbeck # include "btree.h"
26*f0d9efc0Sbeck 
27*f0d9efc0Sbeck # define MUTDIFF  2082844800L
28*f0d9efc0Sbeck 
29*f0d9efc0Sbeck static
30*f0d9efc0Sbeck unsigned long tzdiff = -1;
31*f0d9efc0Sbeck 
32*f0d9efc0Sbeck unsigned char hfs_charorder[256] = {
33*f0d9efc0Sbeck   0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
34*f0d9efc0Sbeck   0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
35*f0d9efc0Sbeck   0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
36*f0d9efc0Sbeck   0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
37*f0d9efc0Sbeck 
38*f0d9efc0Sbeck   0x20, 0x22, 0x23, 0x28, 0x29, 0x2a, 0x2b, 0x2c,
39*f0d9efc0Sbeck   0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
40*f0d9efc0Sbeck   0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e,
41*f0d9efc0Sbeck   0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46,
42*f0d9efc0Sbeck 
43*f0d9efc0Sbeck   0x47, 0x48, 0x58, 0x5a, 0x5e, 0x60, 0x67, 0x69,
44*f0d9efc0Sbeck   0x6b, 0x6d, 0x73, 0x75, 0x77, 0x79, 0x7b, 0x7f,
45*f0d9efc0Sbeck   0x8d, 0x8f, 0x91, 0x93, 0x96, 0x98, 0x9f, 0xa1,
46*f0d9efc0Sbeck   0xa3, 0xa5, 0xa8, 0xaa, 0xab, 0xac, 0xad, 0xae,
47*f0d9efc0Sbeck 
48*f0d9efc0Sbeck   0x54, 0x48, 0x58, 0x5a, 0x5e, 0x60, 0x67, 0x69,
49*f0d9efc0Sbeck   0x6b, 0x6d, 0x73, 0x75, 0x77, 0x79, 0x7b, 0x7f,
50*f0d9efc0Sbeck   0x8d, 0x8f, 0x91, 0x93, 0x96, 0x98, 0x9f, 0xa1,
51*f0d9efc0Sbeck   0xa3, 0xa5, 0xa8, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3,
52*f0d9efc0Sbeck 
53*f0d9efc0Sbeck   0x4c, 0x50, 0x5c, 0x62, 0x7d, 0x81, 0x9a, 0x55,
54*f0d9efc0Sbeck   0x4a, 0x56, 0x4c, 0x4e, 0x50, 0x5c, 0x62, 0x64,
55*f0d9efc0Sbeck   0x65, 0x66, 0x6f, 0x70, 0x71, 0x72, 0x7d, 0x89,
56*f0d9efc0Sbeck   0x8a, 0x8b, 0x81, 0x83, 0x9c, 0x9d, 0x9e, 0x9a,
57*f0d9efc0Sbeck 
58*f0d9efc0Sbeck   0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0x95,
59*f0d9efc0Sbeck   0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0x52, 0x85,
60*f0d9efc0Sbeck   0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8,
61*f0d9efc0Sbeck   0xc9, 0xca, 0xcb, 0x57, 0x8c, 0xcc, 0x52, 0x85,
62*f0d9efc0Sbeck 
63*f0d9efc0Sbeck   0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0x26,
64*f0d9efc0Sbeck   0x27, 0xd4, 0x20, 0x4a, 0x4e, 0x83, 0x87, 0x87,
65*f0d9efc0Sbeck   0xd5, 0xd6, 0x24, 0x25, 0x2d, 0x2e, 0xd7, 0xd8,
66*f0d9efc0Sbeck   0xa7, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
67*f0d9efc0Sbeck 
68*f0d9efc0Sbeck   0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
69*f0d9efc0Sbeck   0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
70*f0d9efc0Sbeck   0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
71*f0d9efc0Sbeck   0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
72*f0d9efc0Sbeck };
73*f0d9efc0Sbeck 
74*f0d9efc0Sbeck /*
75*f0d9efc0Sbeck  * NAME:	data->getb()
76*f0d9efc0Sbeck  * DESCRIPTION:	marshal 1 byte into local host format
77*f0d9efc0Sbeck  */
d_getb(unsigned char * ptr)78*f0d9efc0Sbeck char d_getb(unsigned char *ptr)
79*f0d9efc0Sbeck {
80*f0d9efc0Sbeck   return (char) ptr[0];
81*f0d9efc0Sbeck }
82*f0d9efc0Sbeck 
83*f0d9efc0Sbeck /*
84*f0d9efc0Sbeck  * NAME:	data->getw()
85*f0d9efc0Sbeck  * DESCRIPTION:	marshal 2 bytes into local host format
86*f0d9efc0Sbeck  */
d_getw(unsigned char * ptr)87*f0d9efc0Sbeck short d_getw(unsigned char *ptr)
88*f0d9efc0Sbeck {
89*f0d9efc0Sbeck   return (short)
90*f0d9efc0Sbeck     ((ptr[0] << 8) |
91*f0d9efc0Sbeck      (ptr[1] << 0));
92*f0d9efc0Sbeck }
93*f0d9efc0Sbeck 
94*f0d9efc0Sbeck /*
95*f0d9efc0Sbeck  * NAME:	data->getl()
96*f0d9efc0Sbeck  * DESCRIPTION:	marshal 4 bytes into local host format
97*f0d9efc0Sbeck  */
d_getl(unsigned char * ptr)98*f0d9efc0Sbeck long d_getl(unsigned char *ptr)
99*f0d9efc0Sbeck {
100*f0d9efc0Sbeck   return (long)
101*f0d9efc0Sbeck     ((ptr[0] << 24) |
102*f0d9efc0Sbeck      (ptr[1] << 16) |
103*f0d9efc0Sbeck      (ptr[2] <<  8) |
104*f0d9efc0Sbeck      (ptr[3] <<  0));
105*f0d9efc0Sbeck }
106*f0d9efc0Sbeck 
107*f0d9efc0Sbeck /*
108*f0d9efc0Sbeck  * NAME:	data->putb()
109*f0d9efc0Sbeck  * DESCRIPTION:	marshal 1 byte out to Macintosh (big-endian) format
110*f0d9efc0Sbeck  */
d_putb(unsigned char * ptr,char data)111*f0d9efc0Sbeck void d_putb(unsigned char *ptr, char data)
112*f0d9efc0Sbeck {
113*f0d9efc0Sbeck   ptr[0] = (unsigned char) data;
114*f0d9efc0Sbeck }
115*f0d9efc0Sbeck 
116*f0d9efc0Sbeck /*
117*f0d9efc0Sbeck  * NAME:	data->putw()
118*f0d9efc0Sbeck  * DESCRIPTION:	marshal 2 bytes out to Macintosh (big-endian) format
119*f0d9efc0Sbeck  */
d_putw(unsigned char * ptr,short data)120*f0d9efc0Sbeck void d_putw(unsigned char *ptr, short data)
121*f0d9efc0Sbeck {
122*f0d9efc0Sbeck   ptr[0] = ((unsigned short) data & 0xff00) >> 8;
123*f0d9efc0Sbeck   ptr[1] = ((unsigned short) data & 0x00ff) >> 0;
124*f0d9efc0Sbeck }
125*f0d9efc0Sbeck 
126*f0d9efc0Sbeck /*
127*f0d9efc0Sbeck  * NAME:	data->putl()
128*f0d9efc0Sbeck  * DESCRIPTION:	marshal 4 bytes out to Macintosh (big-endian) format
129*f0d9efc0Sbeck  */
d_putl(unsigned char * ptr,long data)130*f0d9efc0Sbeck void d_putl(unsigned char *ptr, long data)
131*f0d9efc0Sbeck {
132*f0d9efc0Sbeck   ptr[0] = ((unsigned long) data & 0xff000000) >> 24;
133*f0d9efc0Sbeck   ptr[1] = ((unsigned long) data & 0x00ff0000) >> 16;
134*f0d9efc0Sbeck   ptr[2] = ((unsigned long) data & 0x0000ff00) >>  8;
135*f0d9efc0Sbeck   ptr[3] = ((unsigned long) data & 0x000000ff) >>  0;
136*f0d9efc0Sbeck }
137*f0d9efc0Sbeck 
138*f0d9efc0Sbeck /*
139*f0d9efc0Sbeck  * NAME:	data->fetchb()
140*f0d9efc0Sbeck  * DESCRIPTION:	incrementally retrieve a byte of data
141*f0d9efc0Sbeck  */
d_fetchb(unsigned char ** ptr,char * dest)142*f0d9efc0Sbeck void d_fetchb(unsigned char **ptr, char *dest)
143*f0d9efc0Sbeck {
144*f0d9efc0Sbeck   *dest = d_getb(*ptr);
145*f0d9efc0Sbeck   *ptr += 1;
146*f0d9efc0Sbeck }
147*f0d9efc0Sbeck 
148*f0d9efc0Sbeck /*
149*f0d9efc0Sbeck  * NAME:	data->fetchw()
150*f0d9efc0Sbeck  * DESCRIPTION:	incrementally retrieve a word of data
151*f0d9efc0Sbeck  */
d_fetchw(unsigned char ** ptr,short * dest)152*f0d9efc0Sbeck void d_fetchw(unsigned char **ptr, short *dest)
153*f0d9efc0Sbeck {
154*f0d9efc0Sbeck   *dest = d_getw(*ptr);
155*f0d9efc0Sbeck   *ptr += 2;
156*f0d9efc0Sbeck }
157*f0d9efc0Sbeck 
158*f0d9efc0Sbeck /*
159*f0d9efc0Sbeck  * NAME:	data->fetchl()
160*f0d9efc0Sbeck  * DESCRIPTION:	incrementally retrieve a long word of data
161*f0d9efc0Sbeck  */
d_fetchl(unsigned char ** ptr,long * dest)162*f0d9efc0Sbeck void d_fetchl(unsigned char **ptr, long *dest)
163*f0d9efc0Sbeck {
164*f0d9efc0Sbeck   *dest = d_getl(*ptr);
165*f0d9efc0Sbeck   *ptr += 4;
166*f0d9efc0Sbeck }
167*f0d9efc0Sbeck 
168*f0d9efc0Sbeck /*
169*f0d9efc0Sbeck  * NAME:	data->fetchs()
170*f0d9efc0Sbeck  * DESCRIPTION:	incrementally retrieve a string
171*f0d9efc0Sbeck  */
d_fetchs(unsigned char ** ptr,char * dest,int size)172*f0d9efc0Sbeck void d_fetchs(unsigned char **ptr, char *dest, int size)
173*f0d9efc0Sbeck {
174*f0d9efc0Sbeck   int len;
175*f0d9efc0Sbeck   char blen;
176*f0d9efc0Sbeck 
177*f0d9efc0Sbeck   d_fetchb(ptr, &blen);
178*f0d9efc0Sbeck   len = blen;
179*f0d9efc0Sbeck 
180*f0d9efc0Sbeck   if (len > 0 && len < size)
181*f0d9efc0Sbeck     memcpy(dest, *ptr, len);
182*f0d9efc0Sbeck   else
183*f0d9efc0Sbeck     len = 0;
184*f0d9efc0Sbeck 
185*f0d9efc0Sbeck   dest[len] = 0;
186*f0d9efc0Sbeck 
187*f0d9efc0Sbeck   *ptr += size - 1;
188*f0d9efc0Sbeck }
189*f0d9efc0Sbeck 
190*f0d9efc0Sbeck /*
191*f0d9efc0Sbeck  * NAME:	data->storeb()
192*f0d9efc0Sbeck  * DESCRIPTION:	incrementally store a byte of data
193*f0d9efc0Sbeck  */
d_storeb(unsigned char ** ptr,char data)194*f0d9efc0Sbeck void d_storeb(unsigned char **ptr, char data)
195*f0d9efc0Sbeck {
196*f0d9efc0Sbeck   d_putb(*ptr, data);
197*f0d9efc0Sbeck   *ptr += 1;
198*f0d9efc0Sbeck }
199*f0d9efc0Sbeck 
200*f0d9efc0Sbeck /*
201*f0d9efc0Sbeck  * NAME:	data->storew()
202*f0d9efc0Sbeck  * DESCRIPTION:	incrementally store a word of data
203*f0d9efc0Sbeck  */
d_storew(unsigned char ** ptr,short data)204*f0d9efc0Sbeck void d_storew(unsigned char **ptr, short data)
205*f0d9efc0Sbeck {
206*f0d9efc0Sbeck   d_putw(*ptr, data);
207*f0d9efc0Sbeck   *ptr += 2;
208*f0d9efc0Sbeck }
209*f0d9efc0Sbeck 
210*f0d9efc0Sbeck /*
211*f0d9efc0Sbeck  * NAME:	data->storel()
212*f0d9efc0Sbeck  * DESCRIPTION:	incrementally store a long word of data
213*f0d9efc0Sbeck  */
d_storel(unsigned char ** ptr,long data)214*f0d9efc0Sbeck void d_storel(unsigned char **ptr, long data)
215*f0d9efc0Sbeck {
216*f0d9efc0Sbeck   d_putl(*ptr, data);
217*f0d9efc0Sbeck   *ptr += 4;
218*f0d9efc0Sbeck }
219*f0d9efc0Sbeck 
220*f0d9efc0Sbeck /*
221*f0d9efc0Sbeck  * NAME:	data->stores()
222*f0d9efc0Sbeck  * DESCRIPTION:	incrementally store a string
223*f0d9efc0Sbeck  */
d_stores(unsigned char ** ptr,char * src,int size)224*f0d9efc0Sbeck void d_stores(unsigned char **ptr, char *src, int size)
225*f0d9efc0Sbeck {
226*f0d9efc0Sbeck   int len;
227*f0d9efc0Sbeck 
228*f0d9efc0Sbeck   len = strlen(src);
229*f0d9efc0Sbeck   if (len > --size)
230*f0d9efc0Sbeck     len = 0;
231*f0d9efc0Sbeck 
232*f0d9efc0Sbeck   d_storeb(ptr, (unsigned char) len);
233*f0d9efc0Sbeck 
234*f0d9efc0Sbeck   memcpy(*ptr, src, len);
235*f0d9efc0Sbeck   memset(*ptr + len, 0, size - len);
236*f0d9efc0Sbeck 
237*f0d9efc0Sbeck   *ptr += size;
238*f0d9efc0Sbeck }
239*f0d9efc0Sbeck 
240*f0d9efc0Sbeck /*
241*f0d9efc0Sbeck  * NAME:	calctzdiff()
242*f0d9efc0Sbeck  * DESCRIPTION:	calculate the timezone difference between local time and UTC
243*f0d9efc0Sbeck  */
244*f0d9efc0Sbeck static
calctzdiff(void)245*f0d9efc0Sbeck void calctzdiff(void)
246*f0d9efc0Sbeck {
247*f0d9efc0Sbeck   time_t t;
248*f0d9efc0Sbeck   int isdst;
249*f0d9efc0Sbeck   struct tm tm, *tmp;
250*f0d9efc0Sbeck 
251*f0d9efc0Sbeck   time(&t);
252*f0d9efc0Sbeck   isdst = localtime(&t)->tm_isdst;
253*f0d9efc0Sbeck 
254*f0d9efc0Sbeck   tmp = gmtime(&t);
255*f0d9efc0Sbeck   if (tmp)
256*f0d9efc0Sbeck     {
257*f0d9efc0Sbeck       tm = *tmp;
258*f0d9efc0Sbeck       tm.tm_isdst = isdst;
259*f0d9efc0Sbeck 
260*f0d9efc0Sbeck       tzdiff = t - mktime(&tm);
261*f0d9efc0Sbeck     }
262*f0d9efc0Sbeck   else
263*f0d9efc0Sbeck     tzdiff = 0;
264*f0d9efc0Sbeck }
265*f0d9efc0Sbeck 
266*f0d9efc0Sbeck /*
267*f0d9efc0Sbeck  * NAME:	data->tomtime()
268*f0d9efc0Sbeck  * DESCRIPTION:	convert UNIX time to Macintosh time
269*f0d9efc0Sbeck  */
d_tomtime(unsigned long secs)270*f0d9efc0Sbeck unsigned long d_tomtime(unsigned long secs)
271*f0d9efc0Sbeck {
272*f0d9efc0Sbeck   time_t utime = secs;
273*f0d9efc0Sbeck 
274*f0d9efc0Sbeck   if (tzdiff == -1)
275*f0d9efc0Sbeck     calctzdiff();
276*f0d9efc0Sbeck 
277*f0d9efc0Sbeck   return utime + tzdiff + MUTDIFF;
278*f0d9efc0Sbeck }
279*f0d9efc0Sbeck 
280*f0d9efc0Sbeck /*
281*f0d9efc0Sbeck  * NAME:	data->toutime()
282*f0d9efc0Sbeck  * DESCRIPTION:	convert Macintosh time to UNIX time
283*f0d9efc0Sbeck  */
d_toutime(unsigned long secs)284*f0d9efc0Sbeck unsigned long d_toutime(unsigned long secs)
285*f0d9efc0Sbeck {
286*f0d9efc0Sbeck   time_t utime = secs;
287*f0d9efc0Sbeck 
288*f0d9efc0Sbeck   if (tzdiff == -1)
289*f0d9efc0Sbeck     calctzdiff();
290*f0d9efc0Sbeck 
291*f0d9efc0Sbeck   return utime - MUTDIFF - tzdiff;
292*f0d9efc0Sbeck }
293*f0d9efc0Sbeck 
294*f0d9efc0Sbeck /*
295*f0d9efc0Sbeck  * NAME:	data->relstring()
296*f0d9efc0Sbeck  * DESCRIPTION:	compare two strings as per MacOS for HFS
297*f0d9efc0Sbeck  */
d_relstring(char * str1,char * str2)298*f0d9efc0Sbeck int d_relstring(char *str1, char *str2)
299*f0d9efc0Sbeck {
300*f0d9efc0Sbeck   int diff;
301*f0d9efc0Sbeck 
302*f0d9efc0Sbeck   while (*str1 && *str2)
303*f0d9efc0Sbeck     {
304*f0d9efc0Sbeck       diff = hfs_charorder[(unsigned char) *str1] -
305*f0d9efc0Sbeck 	     hfs_charorder[(unsigned char) *str2];
306*f0d9efc0Sbeck 
307*f0d9efc0Sbeck       if (diff)
308*f0d9efc0Sbeck 	return diff;
309*f0d9efc0Sbeck 
310*f0d9efc0Sbeck       ++str1, ++str2;
311*f0d9efc0Sbeck     }
312*f0d9efc0Sbeck 
313*f0d9efc0Sbeck   if (! *str1 && *str2)
314*f0d9efc0Sbeck     return -1;
315*f0d9efc0Sbeck   else if (*str1 && ! *str2)
316*f0d9efc0Sbeck     return 1;
317*f0d9efc0Sbeck 
318*f0d9efc0Sbeck   return 0;
319*f0d9efc0Sbeck }
320