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2a2473d @migueldeicaza update copyright notices
migueldeicaza authored
1 /*
2 * mono-endian.c:
3 *
4 * Author:
5 * Mono Project (http://www.mono-project.com)
6 *
7 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
8 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
9 */
76c57c0 Compatibility fixes for MS compilers and WinCE build;
Sergey Chaban authored
10 #include <config.h>
5324a1c reverted my last changes, fixed unaligned access to make it work
Radek Doulik authored
11 #include "mono-endian.h"
12
13 #if NO_UNALIGNED_ACCESS
14
15 typedef union {
16 char c [2];
17 guint16 i;
18 } mono_rint16;
19
20 typedef union {
21 char c [4];
22 guint32 i;
23 } mono_rint32;
24
25 typedef union {
26 char c [8];
27 guint64 i;
28 } mono_rint64;
29
30 guint16
31 mono_read16 (const unsigned char *x)
32 {
33 mono_rint16 r;
34 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
35 r.c [0] = x [0];
36 r.c [1] = x [1];
37 #else
38 r.c [1] = x [0];
39 r.c [0] = x [1];
40 #endif
41 return r.i;
42 }
43
44 guint32
45 mono_read32 (const unsigned char *x)
46 {
47 mono_rint32 r;
48 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
49 r.c [0] = x [0];
50 r.c [1] = x [1];
51 r.c [2] = x [2];
52 r.c [3] = x [3];
53 #else
54 r.c [3] = x [0];
55 r.c [2] = x [1];
56 r.c [1] = x [2];
57 r.c [0] = x [3];
58 #endif
59 return r.i;
60 }
61
62 guint64
63 mono_read64 (const unsigned char *x)
64 {
65 mono_rint64 r;
66 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
67 r.c [0] = x [0];
68 r.c [1] = x [1];
69 r.c [2] = x [2];
70 r.c [3] = x [3];
71 r.c [4] = x [4];
72 r.c [5] = x [5];
73 r.c [6] = x [6];
74 r.c [7] = x [7];
75 #else
76 r.c [7] = x [0];
77 r.c [6] = x [1];
78 r.c [5] = x [2];
79 r.c [4] = x [3];
80 r.c [3] = x [4];
81 r.c [2] = x [5];
82 r.c [1] = x [6];
83 r.c [0] = x [7];
84 #endif
85 return r.i;
86 }
87
88 #endif
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