然而,我正在写一个包装器在C + + CLI为我们的应用程序给一些新的部分(用C#编写)保存和容易访问旧的本地库。因此,我需要通过一些结构从c#到c ++。这些结构在C ++ Cli(dotnet)和C ++中定义。
Yet I am writting a wrapper in C++ CLI for our application to give some new parts (written in C#) save and easy access to old native libraries. Therefore I need to pass some structures from c# to c++. These structures are defined in C++ Cli (dotnet) and also in C++.
示例:
\\C+++ typedef struct { INFO16 jahr ; INFO8 monat ; INFO8 tag ; INFO8 stunde ; INFO8 minute ; } SDATUM; \\c++ cli [StructLayout(LayoutKind::Explicit)] public value struct SDATUM { public: [FieldOffset(0)] UInt16 jahr; [FieldOffset(2)] Byte monat; [FieldOffset(3)] Byte tag; [FieldOffset(4)] Byte stunde; [FieldOffset(5)] Byte minute; };现在我在C ++ cli中提供一些函数,接受这种类型的dotnet类型为SDATUM值,通过引用(sdatum%)和指针sdatum *,就像有相应的本机函数。我需要转换/转换这些结构?
Now I provide some functions in C++ cli which accept this type as dotnet type SDATUM in form of pass by value,by reference (sdatum%) and pointer sdatum* like there corresponding native functions. What do I need to convert/cast these struct?
推荐答案我发现另一个解决方案是非常容易,简短,复制数据。 你可以这样调用想要C SDATUM的本地函数:
I found another solution which is very easy, short and does not need copying data. You could call native functions which want a C SDATUM in this way:
//signature void someFunction(SDATUM datum); void someFunctionWrapper(SDATUM datum){ pin_ptr<SDATUM> datum_pin=&datum; //::SDATUM refers to the C-Type someFunction(*(::SDATUM*)datum_pin); }我测试了它,因为两个SDATUM结构都有相同的位结构。因为我只调用短的本地函数,我认为碎片没有问题。
I tested it and it works because both SDATUM Structs have the same bit structure. Because I only call short native functions I think fragmentation is no problem.
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包装器DOTNET到本机编写的C ++ CLI BestWay传递strutures?
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