1 /* $NetBSD: cd9660_conversion.c,v 1.4 2007/03/14 14:11:17 christos Exp $ */
4 * Copyright (c) 2005 Daniel Watt, Walter Deignan, Ryan Gabrys, Alan
5 * Perez-Rathke and Ram Vedam. All rights reserved.
7 * This code was written by Daniel Watt, Walter Deignan, Ryan Gabrys,
8 * Alan Perez-Rathke and Ram Vedam.
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
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
16 * copyright notice, this list of conditions and the following
17 * disclaimer in the documentation and/or other materials provided
18 * with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY DANIEL WATT, WALTER DEIGNAN, RYAN
21 * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL DANIEL WATT, WALTER DEIGNAN, RYAN
25 * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
28 * USE,DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
29 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
39 static char cd9660_compute_gm_offset(time_t);
43 cd9660_pad_even(length)
46 return length + (length & 0x01);
51 * These can probably be implemented using a macro
56 cd9660_721(uint16_t w, unsigned char *twochar)
58 #if BYTE_ORDER == BIG_ENDIAN
65 cd9660_731(uint32_t w, unsigned char *fourchar)
67 #if BYTE_ORDER == BIG_ENDIAN
70 memcpy(fourchar,&w,4);
75 cd9660_722(uint16_t w, unsigned char *twochar)
77 #if BYTE_ORDER == LITTLE_ENDIAN
84 cd9660_732(uint32_t w, unsigned char *fourchar)
86 #if BYTE_ORDER == LITTLE_ENDIAN
89 memcpy(fourchar,&w,4);
93 * Convert a dword into a double endian string of eight characters
94 * @param int The double word to convert
95 * @param char* The string to write the both endian double word to - It is assumed this is allocated and at least
96 * eight characters long
99 cd9660_bothendian_dword(uint32_t dw, unsigned char *eightchar)
102 #if BYTE_ORDER == LITTLE_ENDIAN
106 #if BYTE_ORDER == BIG_ENDIAN
110 memcpy(eightchar, &le, 4);
111 memcpy((eightchar+4), &be, 4);
115 * Convert a word into a double endian string of four characters
116 * @param int The word to convert
117 * @param char* The string to write the both endian word to - It is assumed this is allocated and at least
118 * four characters long
121 cd9660_bothendian_word(uint16_t dw, unsigned char *fourchar)
124 #if BYTE_ORDER == LITTLE_ENDIAN
128 #if BYTE_ORDER == BIG_ENDIAN
132 memcpy(fourchar, &le, 2);
133 memcpy((fourchar+2), &be, 2);
137 cd9660_pad_string_spaces(char *str, int len)
141 for (i = 0; i < len; i ++) {
148 cd9660_compute_gm_offset(time_t tim)
152 (void)localtime_r(&tim, &t);
153 (void)gmtime_r(&tim, &gm);
154 gm.tm_year -= t.tm_year;
155 gm.tm_yday -= t.tm_yday;
156 gm.tm_hour -= t.tm_hour;
157 gm.tm_min -= t.tm_min;
160 else if (gm.tm_year > 0)
163 return (char)(-(gm.tm_min + 60* (24 * gm.tm_yday + gm.tm_hour)) / 15);
166 /* Long dates: 17 characters */
168 cd9660_time_8426(unsigned char *buf, time_t tim)
173 (void)localtime_r(&tim, &t);
174 (void)snprintf(temp, sizeof(temp), "%04i%02i%02i%02i%02i%02i%02i",
182 (void)memcpy(buf, temp, 16);
183 buf[16] = cd9660_compute_gm_offset(tim);
186 /* Short dates: 7 characters */
188 cd9660_time_915(unsigned char *buf, time_t tim)
192 (void)localtime_r(&tim, &t);
199 buf[6] = cd9660_compute_gm_offset(tim);