trunk/genisoimage/endian.c

/*
 * endian.c
 *
 * Copyright (c) Steve McIntyre <steve@einval.com>
 *
 * Simple helper routines for marshalling data
 *
 * GNU GPL v2
 */

#include <mconfig.h>
#include "endianconv.h"

/* Write a 64-bit quantity out into memory in BIG ENDIAN order */
void write_be64(unsigned long long in, unsigned char *out)
{
    out[0] = (in >> 56) & 0xFF;
    out[1] = (in >> 48) & 0xFF;
    out[2] = (in >> 40) & 0xFF;
    out[3] = (in >> 32) & 0xFF;
    out[4] = (in >> 24) & 0xFF;
    out[5] = (in >> 16) & 0xFF;
    out[6] = (in >> 8) & 0xFF;
    out[7] = in & 0xFF;
}

/* Read in a 64-bit BIG ENDIAN quantity */
unsigned long long read_be64(unsigned char *in)
{
    unsigned long long result = 0;

    result |= (unsigned long long)in[0] << 56;
    result |= (unsigned long long)in[1] << 48;
    result |= (unsigned long long)in[2] << 40;
    result |= (unsigned long long)in[3] << 32;
    result |= (unsigned long long)in[4] << 24;
    result |= (unsigned long long)in[5] << 16;
    result |= (unsigned long long)in[6] << 8;
    result |= (unsigned long long)in[7];
    
    return result;
}

/* Write a 64-bit quantity out into memory in LITTLE ENDIAN order */
void write_le64(unsigned long long in, unsigned char *out)
{
    out[0] = in & 0xFF;
    out[1] = (in >> 8) & 0xFF;
    out[2] = (in >> 16) & 0xFF;
    out[3] = (in >> 24) & 0xFF;
    out[4] = (in >> 32) & 0xFF;
    out[5] = (in >> 40) & 0xFF;
    out[6] = (in >> 48) & 0xFF;
    out[7] = (in >> 56) & 0xFF;
}

/* Read in a 64-bit LITTLE ENDIAN quantity */
unsigned long long read_le64(unsigned char *in)
{
    unsigned long long result = 0;

    result |= (unsigned long long)in[0];
    result |= (unsigned long long)in[1] << 8;
    result |= (unsigned long long)in[2] << 16;
    result |= (unsigned long long)in[3] << 24;
    result |= (unsigned long long)in[4] << 32;
    result |= (unsigned long long)in[5] << 40;
    result |= (unsigned long long)in[6] << 48;
    result |= (unsigned long long)in[7] << 56;
    
    return result;
}

/* Write a 48-bit quantity out into memory in LITTLE ENDIAN order */
void write_le48(unsigned long long in, unsigned char *out)
{
    out[0] = in & 0xFF;
    out[1] = (in >> 8) & 0xFF;
    out[2] = (in >> 16) & 0xFF;
    out[3] = (in >> 24) & 0xFF;
    out[4] = (in >> 32) & 0xFF;
    out[5] = (in >> 40) & 0xFF;
}

/* Read in a 48-bit LITTLE ENDIAN quantity */
unsigned long long read_le48(unsigned char *in)
{
    unsigned long long result = 0;

    result |= (unsigned long long)in[0];
    result |= (unsigned long long)in[1] << 8;
    result |= (unsigned long long)in[2] << 16;
    result |= (unsigned long long)in[3] << 24;
    result |= (unsigned long long)in[4] << 32;
    result |= (unsigned long long)in[5] << 40;
    
    return result;
}

/* Write a 32-bit quantity out into memory in BIG ENDIAN order */
void write_be32(unsigned long in, unsigned char *out)
{
    out[0] = (in >> 24) & 0xFF;
    out[1] = (in >> 16) & 0xFF;
    out[2] = (in >> 8) & 0xFF;
    out[3] = in & 0xFF;
}

/* Read in a 32-bit BIG ENDIAN quantity */
unsigned long read_be32(unsigned char *in)
{
    unsigned long result = 0;

    result |= (unsigned long)in[0] << 24;
    result |= (unsigned long)in[1] << 16;
    result |= (unsigned long)in[2] << 8;
    result |= (unsigned long)in[3];
    
    return result;
}

/* Write a 32-bit quantity out into memory in LITTLE ENDIAN order */
void write_le32(unsigned long in, unsigned char *out)
{
    out[0] = in & 0xFF;
    out[1] = (in >> 8) & 0xFF;
    out[2] = (in >> 16) & 0xFF;
    out[3] = (in >> 24) & 0xFF;
}

/* Read in a 32-bit LITTLE ENDIAN quantity */
unsigned long read_le32(unsigned char *in)
{
    unsigned long result = 0;

    result |= (unsigned long)in[0];
    result |= (unsigned long)in[1] << 8;
    result |= (unsigned long)in[2] << 16;
    result |= (unsigned long)in[3] << 24;
    
    return result;
}

/* Write a 16-bit quantity out into memory in BIG ENDIAN order */
void write_be16(unsigned short in, unsigned char *out)
{
    out[0] = (in >> 8) & 0xFF;
    out[1] = in & 0xFF;
}
    
/* Read in a 16-bit BIG ENDIAN quantity */
unsigned short read_be16(unsigned char *in)
{
    unsigned short result = 0;
    
    result |= (unsigned short)in[0] << 8;
    result |= (unsigned short)in[1];
    return result;
}

/* Write a 16-bit quantity out into memory in LITTLE ENDIAN order */
void write_le16(unsigned short in, unsigned char *out)
{
    out[0] = in & 0xFF;
    out[1] = in & 0xFF >> 8;
}
    
/* Read in a 16-bit LITTLE ENDIAN quantity */
unsigned short read_le16(unsigned char *in)
{
    unsigned short result = 0;
    
    result |= (unsigned short)in[0];
    result |= (unsigned short)in[1] << 8;
    return result;
}

1	blade	174	/*
2	93sam	609	* endian.c
3	blade	174	*
4	93sam	609	* Copyright (c) Steve McIntyre <steve@einval.com>
5	blade	174	*
6	93sam	609	* Simple helper routines for marshalling data
7	blade	174	*
8	93sam	609	* GNU GPL v2
9	blade	174	*/
10
11	blade	38	#include <mconfig.h>
12	blade	314	#include "endianconv.h"
13	blade	38
14			/* Write a 64-bit quantity out into memory in BIG ENDIAN order */
15	kaner-guest	368	void write_be64(unsigned long long in, unsigned char *out)
16	blade	38	{
17			out[0] = (in >> 56) & 0xFF;
18			out[1] = (in >> 48) & 0xFF;
19			out[2] = (in >> 40) & 0xFF;
20			out[3] = (in >> 32) & 0xFF;
21			out[4] = (in >> 24) & 0xFF;
22			out[5] = (in >> 16) & 0xFF;
23			out[6] = (in >> 8) & 0xFF;
24			out[7] = in & 0xFF;
25			}
26
27			/* Read in a 64-bit BIG ENDIAN quantity */
28	kaner-guest	368	unsigned long long read_be64(unsigned char *in)
29	blade	38	{
30			unsigned long long result = 0;
31
32			result \|= (unsigned long long)in[0] << 56;
33			result \|= (unsigned long long)in[1] << 48;
34			result \|= (unsigned long long)in[2] << 40;
35			result \|= (unsigned long long)in[3] << 32;
36			result \|= (unsigned long long)in[4] << 24;
37			result \|= (unsigned long long)in[5] << 16;
38			result \|= (unsigned long long)in[6] << 8;
39			result \|= (unsigned long long)in[7];
40
41			return result;
42			}
43
44			/* Write a 64-bit quantity out into memory in LITTLE ENDIAN order */
45	kaner-guest	368	void write_le64(unsigned long long in, unsigned char *out)
46	blade	38	{
47			out[0] = in & 0xFF;
48			out[1] = (in >> 8) & 0xFF;
49			out[2] = (in >> 16) & 0xFF;
50			out[3] = (in >> 24) & 0xFF;
51			out[4] = (in >> 32) & 0xFF;
52			out[5] = (in >> 40) & 0xFF;
53			out[6] = (in >> 48) & 0xFF;
54			out[7] = (in >> 56) & 0xFF;
55			}
56
57			/* Read in a 64-bit LITTLE ENDIAN quantity */
58	kaner-guest	368	unsigned long long read_le64(unsigned char *in)
59	blade	38	{
60			unsigned long long result = 0;
61
62			result \|= (unsigned long long)in[0];
63			result \|= (unsigned long long)in[1] << 8;
64			result \|= (unsigned long long)in[2] << 16;
65			result \|= (unsigned long long)in[3] << 24;
66			result \|= (unsigned long long)in[4] << 32;
67			result \|= (unsigned long long)in[5] << 40;
68			result \|= (unsigned long long)in[6] << 48;
69			result \|= (unsigned long long)in[7] << 56;
70
71			return result;
72			}
73
74			/* Write a 48-bit quantity out into memory in LITTLE ENDIAN order */
75	kaner-guest	368	void write_le48(unsigned long long in, unsigned char *out)
76	blade	38	{
77			out[0] = in & 0xFF;
78			out[1] = (in >> 8) & 0xFF;
79			out[2] = (in >> 16) & 0xFF;
80			out[3] = (in >> 24) & 0xFF;
81			out[4] = (in >> 32) & 0xFF;
82			out[5] = (in >> 40) & 0xFF;
83			}
84
85			/* Read in a 48-bit LITTLE ENDIAN quantity */
86	kaner-guest	368	unsigned long long read_le48(unsigned char *in)
87	blade	38	{
88			unsigned long long result = 0;
89
90			result \|= (unsigned long long)in[0];
91			result \|= (unsigned long long)in[1] << 8;
92			result \|= (unsigned long long)in[2] << 16;
93			result \|= (unsigned long long)in[3] << 24;
94			result \|= (unsigned long long)in[4] << 32;
95			result \|= (unsigned long long)in[5] << 40;
96
97			return result;
98			}
99
100			/* Write a 32-bit quantity out into memory in BIG ENDIAN order */
101	kaner-guest	368	void write_be32(unsigned long in, unsigned char *out)
102	blade	38	{
103			out[0] = (in >> 24) & 0xFF;
104			out[1] = (in >> 16) & 0xFF;
105			out[2] = (in >> 8) & 0xFF;
106			out[3] = in & 0xFF;
107			}
108
109			/* Read in a 32-bit BIG ENDIAN quantity */
110	kaner-guest	368	unsigned long read_be32(unsigned char *in)
111	blade	38	{
112			unsigned long result = 0;
113
114			result \|= (unsigned long)in[0] << 24;
115			result \|= (unsigned long)in[1] << 16;
116			result \|= (unsigned long)in[2] << 8;
117			result \|= (unsigned long)in[3];
118
119			return result;
120			}
121
122			/* Write a 32-bit quantity out into memory in LITTLE ENDIAN order */
123	kaner-guest	368	void write_le32(unsigned long in, unsigned char *out)
124	blade	38	{
125			out[0] = in & 0xFF;
126			out[1] = (in >> 8) & 0xFF;
127			out[2] = (in >> 16) & 0xFF;
128			out[3] = (in >> 24) & 0xFF;
129			}
130
131			/* Read in a 32-bit LITTLE ENDIAN quantity */
132	kaner-guest	368	unsigned long read_le32(unsigned char *in)
133	blade	38	{
134			unsigned long result = 0;
135
136			result \|= (unsigned long)in[0];
137			result \|= (unsigned long)in[1] << 8;
138			result \|= (unsigned long)in[2] << 16;
139			result \|= (unsigned long)in[3] << 24;
140
141			return result;
142			}
143
144			/* Write a 16-bit quantity out into memory in BIG ENDIAN order */
145	kaner-guest	368	void write_be16(unsigned short in, unsigned char *out)
146	blade	38	{
147			out[0] = (in >> 8) & 0xFF;
148			out[1] = in & 0xFF;
149			}
150
151			/* Read in a 16-bit BIG ENDIAN quantity */
152	kaner-guest	368	unsigned short read_be16(unsigned char *in)
153	blade	38	{
154			unsigned short result = 0;
155
156			result \|= (unsigned short)in[0] << 8;
157			result \|= (unsigned short)in[1];
158			return result;
159			}
160
161			/* Write a 16-bit quantity out into memory in LITTLE ENDIAN order */
162	kaner-guest	368	void write_le16(unsigned short in, unsigned char *out)
163	blade	38	{
164			out[0] = in & 0xFF;
165			out[1] = in & 0xFF >> 8;
166			}
167
168			/* Read in a 16-bit LITTLE ENDIAN quantity */
169	kaner-guest	368	unsigned short read_le16(unsigned char *in)
170	blade	38	{
171			unsigned short result = 0;
172
173			result \|= (unsigned short)in[0];
174			result \|= (unsigned short)in[1] << 8;
175			return result;
176			}
177