1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/* $NetBSD: cd9660_conversion.c,v 1.4 2007/03/14 14:11:17 christos Exp $ */
/*
* Copyright (c) 2005 Daniel Watt, Walter Deignan, Ryan Gabrys, Alan
* Perez-Rathke and Ram Vedam. All rights reserved.
*
* This code was written by Daniel Watt, Walter Deignan, Ryan Gabrys,
* Alan Perez-Rathke and Ram Vedam.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY DANIEL WATT, WALTER DEIGNAN, RYAN
* GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL DANIEL WATT, WALTER DEIGNAN, RYAN
* GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE,DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*/
#include "cd9660.h"
#define bswap16 swap16
#define bswap32 swap32
static char cd9660_compute_gm_offset(time_t);
#if 0
static inline int
cd9660_pad_even(length)
int length;
{
return length + (length & 0x01);
}
#endif
/*
* These can probably be implemented using a macro
*/
/* Little endian */
void
cd9660_721(uint16_t w, unsigned char *twochar)
{
#if BYTE_ORDER == BIG_ENDIAN
w = bswap16(w);
#endif
memcpy(twochar,&w,2);
}
void
cd9660_731(uint32_t w, unsigned char *fourchar)
{
#if BYTE_ORDER == BIG_ENDIAN
w = bswap32(w);
#endif
memcpy(fourchar,&w,4);
}
/* Big endian */
void
cd9660_722(uint16_t w, unsigned char *twochar)
{
#if BYTE_ORDER == LITTLE_ENDIAN
w = bswap16(w);
#endif
memcpy(twochar,&w,2);
}
void
cd9660_732(uint32_t w, unsigned char *fourchar)
{
#if BYTE_ORDER == LITTLE_ENDIAN
w = bswap32(w);
#endif
memcpy(fourchar,&w,4);
}
/**
* Convert a dword into a double endian string of eight characters
* @param int The double word to convert
* @param char* The string to write the both endian double word to - It is assumed this is allocated and at least
* eight characters long
*/
void
cd9660_bothendian_dword(uint32_t dw, unsigned char *eightchar)
{
uint32_t le, be;
#if BYTE_ORDER == LITTLE_ENDIAN
le = dw;
be = bswap32(dw);
#endif
#if BYTE_ORDER == BIG_ENDIAN
be = dw;
le = bswap32(dw);
#endif
memcpy(eightchar, &le, 4);
memcpy((eightchar+4), &be, 4);
}
/**
* Convert a word into a double endian string of four characters
* @param int The word to convert
* @param char* The string to write the both endian word to - It is assumed this is allocated and at least
* four characters long
*/
void
cd9660_bothendian_word(uint16_t dw, unsigned char *fourchar)
{
uint16_t le, be;
#if BYTE_ORDER == LITTLE_ENDIAN
le = dw;
be = bswap16(dw);
#endif
#if BYTE_ORDER == BIG_ENDIAN
be = dw;
le = bswap16(dw);
#endif
memcpy(fourchar, &le, 2);
memcpy((fourchar+2), &be, 2);
}
void
cd9660_pad_string_spaces(char *str, int len)
{
int i;
for (i = 0; i < len; i ++) {
if (str[i] == '\0')
str[i] = 0x20;
}
}
static char
cd9660_compute_gm_offset(time_t tim)
{
struct tm t, gm;
(void)localtime_r(&tim, &t);
(void)gmtime_r(&tim, &gm);
gm.tm_year -= t.tm_year;
gm.tm_yday -= t.tm_yday;
gm.tm_hour -= t.tm_hour;
gm.tm_min -= t.tm_min;
if (gm.tm_year < 0)
gm.tm_yday = -1;
else if (gm.tm_year > 0)
gm.tm_yday = 1;
return (char)(-(gm.tm_min + 60* (24 * gm.tm_yday + gm.tm_hour)) / 15);
}
/* Long dates: 17 characters */
void
cd9660_time_8426(unsigned char *buf, time_t tim)
{
struct tm t;
char temp[18];
(void)localtime_r(&tim, &t);
(void)snprintf(temp, sizeof(temp), "%04i%02i%02i%02i%02i%02i%02i",
1900+(int)t.tm_year,
(int)t.tm_mon+1,
(int)t.tm_mday,
(int)t.tm_hour,
(int)t.tm_min,
(int)t.tm_sec,
0);
(void)memcpy(buf, temp, 16);
buf[16] = cd9660_compute_gm_offset(tim);
}
/* Short dates: 7 characters */
void
cd9660_time_915(unsigned char *buf, time_t tim)
{
struct tm t;
(void)localtime_r(&tim, &t);
buf[0] = t.tm_year;
buf[1] = t.tm_mon+1;
buf[2] = t.tm_mday;
buf[3] = t.tm_hour;
buf[4] = t.tm_min;
buf[5] = t.tm_sec;
buf[6] = cd9660_compute_gm_offset(tim);
}
|
