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
|
# CStruct Examples
require 'cstruct'
# example:
# struct Point in C\C++ (32-bit platform):
#
# struct Point
# {
# int x;
# int y;
# };
#
# struct Line in C\C++ (32-bit platform):
#
# struct Line
# {
# Point begin_point;
# Point end_point;
# };
# struct TwoLine in C\C++ (32-bit platform):
#
# struct TwoLine
# {
# Line lines[2];
# };
# struct Point , Line and TwoLine in Ruby:
class Point < CStruct
int32:x
int32:y
end
class Line < CStruct
Point:begin_point
Point:end_point
end
class TwoLine < CStruct
Line:lines,[2]
end
line = Line.new
# assign like as C language
line.begin_point.x = 0
line.begin_point.y = 0
line.end_point.x = 20
line.end_point.y = 30
puts "sizeof(Line) = #{Line.__size__}" # "__size__" is alias of "size"
puts "line.begin_point.x = #{line.begin_point.x}"
puts "line.begin_point.y = #{line.begin_point.y}"
puts "line.end_point.x = #{line.end_point.x}"
puts "line.end_point.y = #{line.end_point.y}"
two_line = TwoLine.new
# assign like as C language
two_line.lines[0].begin_point.x = 6
two_line.lines[0].begin_point.y = 16
two_line.lines[0].end_point.x = 26
two_line.lines[0].end_point.y = 36
two_line.lines[1].begin_point.x = 6
two_line.lines[1].begin_point.y = 16
two_line.lines[1].end_point.x = 26
two_line.lines[1].end_point.y = 36
|
