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
|
/*
* Modification History
*
* 2001-February-3 Jason Rohrer
* Created.
* Fixed a bug in the big-endian code.
* Fixed parameter names to match convention.
*
* 2001-February-26 Jason Rohrer
* Fixed a bug in the little-endian implementation.
*
* 2001-August-28 Jason Rohrer
* Changed to be FreeBSD compatible.
*
* 2002-March-13 Jason Rohrer
* Started to change to work with solaris.
* Finished changing to work with solaris.
*
* 2002-April-11 Jason Rohrer
* Added a default BSD case to work with OSX.
*
* 2002-May-25 Jason Rohrer
* Changed to use minorGems endian.h
*/
#include "minorGems/io/TypeIO.h"
#include "minorGems/system/endian.h"
/*
* Linux-specific type input and output.
* Note that all types are output in the order that
* a big-endian linux machine outputs them with no conversion.
*/
#if __BYTE_ORDER == __LITTLE_ENDIAN
void TypeIO::doubleToBytes( double inDouble, unsigned char *outBytes ) {
unsigned char *doubleBuffer = (unsigned char*)( &inDouble );
// output second word first
outBytes[0] = doubleBuffer[7];
outBytes[1] = doubleBuffer[6];
outBytes[2] = doubleBuffer[5];
outBytes[3] = doubleBuffer[4];
outBytes[4] = doubleBuffer[3];
outBytes[5] = doubleBuffer[2];
outBytes[6] = doubleBuffer[1];
outBytes[7] = doubleBuffer[0];
}
double TypeIO::bytesToDouble( unsigned char *inBytes ) {
double returnValue;
unsigned char *doubleBuffer = (unsigned char*)( &returnValue );
// put first word at the end of this double
doubleBuffer[7] = inBytes[0];
doubleBuffer[6] = inBytes[1];
doubleBuffer[5] = inBytes[2];
doubleBuffer[4] = inBytes[3];
doubleBuffer[3] = inBytes[4];
doubleBuffer[2] = inBytes[5];
doubleBuffer[1] = inBytes[6];
doubleBuffer[0] = inBytes[7];
return returnValue;
}
#endif
#if __BYTE_ORDER == __BIG_ENDIAN
void TypeIO::doubleToBytes( double inDouble, unsigned char *outBytes ) {
unsigned char *doubleBuffer = (unsigned char*)( &inDouble );
// output in stored order
outBytes[0] = doubleBuffer[0];
outBytes[1] = doubleBuffer[1];
outBytes[2] = doubleBuffer[2];
outBytes[3] = doubleBuffer[3];
outBytes[4] = doubleBuffer[4];
outBytes[5] = doubleBuffer[5];
outBytes[6] = doubleBuffer[6];
outBytes[7] = doubleBuffer[7];
}
double TypeIO::bytesToDouble( unsigned char *inBytes ) {
double returnValue;
unsigned char *doubleBuffer = (unsigned char*)( &returnValue );
// store in input order
doubleBuffer[0] = inBytes[0];
doubleBuffer[1] = inBytes[1];
doubleBuffer[2] = inBytes[2];
doubleBuffer[3] = inBytes[3];
doubleBuffer[4] = inBytes[4];
doubleBuffer[5] = inBytes[5];
doubleBuffer[6] = inBytes[6];
doubleBuffer[7] = inBytes[7];
return returnValue;
}
#endif
|
