1. [代码]最简单的例子 # CStruct Examples require 'cstruct' # example: # struct Point in C\C++ (32-bit platform): # # struct Point # { # int x; # int y; # }; # struct Point in Ruby: class Point < CStruct int32:x int32:y end # create a Point's instance point = Point.new # assign like as C language point.x = 10 point.y = 20 puts "point.x = #{point.x},point.y = #{point.y}" # struct PointF in C\C++ (32-bit platform): # # struct PointF # { # double x; # double y; # }; # struct PointF in Ruby: class PointF < CStruct double:x double:y end # create a PointF's instance # use 'block' to initialize the fields point2 = PointF.new do |st| st.x = 10.56 st.y = 20.78 end puts "sizeof(PointF) = #{PointF.size}" puts "point2.x = #{point2.x},point2.y = #{point2.y}" 2. [代码]数组成员
# CStruct Examples require 'cstruct' # example: # struct T in C\C++ (32-bit platform): # # struct T # { # int element[8]; # }; # struct T in Ruby: class T < CStruct int32:elements,[8] end # create a T's instance t_array = T.new (0..7).each do |i| t_array.elements[i] = i # assign like as C language endhttp://www.enterdesk.com/special/huangguantp/ # output皇冠图片 (0..7).each {|i| puts "t_array.elements[#{i}] = #{t_array.elements[i]}" } # Actually,t_array.elements.class is Array. So.. t_array.elements.each {|element| puts element } 3. [代码]结构体嵌套 # CStruct Examples require 'cstruct' # example: # struct A in C\C++ (32-bit platform): # struct A{ # struct Inner # { # int v1; # int v2; # }; # Inner inner; # }; # struct A in Ruby: class A < CStruct class Inner < CStruct int32 :v1 int32 :v2 end Inner :inner end
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