调用从C＃C ++函数 [英] Call a C++ function from C#

问题描述

我有2个C ++动态链接库。其中一个包含以下功能：

I have 2 C++ DLLs. One of them contains the following function:

void init(const unsigned char* initData, const unsigned char* key)

另一种包含此功能：

BYTE* encrypt(BYTE *inOut, UINT inputSize, BYTE *secretKey, UINT secretKeySize).

有没有一种方法调用从C＃这2个功能？我知道你可以使用函数[DllImport]在C＃中调用C ++函数，但指针给了我一个困难时期。

Is there a way to call these 2 functions from C#? I know you can use [DllImport] in C# to call C++ functions, but the pointers are giving me a hard time.

任何帮助，将不胜感激！

Any help would be appreciated!

推荐答案

是的，你可以从C＃假设它们被包裹在外部的C部分称这两种。我不能给你一个详细的PInvoke签名，因为我没有对下面就如何将各种参数之间的关联，但工作的足够信息。

Yes, you can call both of these from C# assuming that they are wrapped in extern "C" sections. I can't give you a detailed PInvoke signature because I don't have enough information on how the various parameters are related but the following will work.

[DllImport("yourdllName.dll")]
public static extern void init(IntPtr initData, IntPtr key);

[DllImport("yourdllName.dll")]
public static extern IntPtr encrpyt(IntPtr inout, unsigned inuputSize, IntPtr key, unsigned secretKeySize);

那将使我们能够创造更加美好的签名信息小品

Pieces of information that would allow us to create a better signature

1. 是加密的收益分配的内存？


2. 如果＃1是真实的，是如何分配的内存


3. 您能否给的参数如何工作的基本描述？


4. 我猜，所有的指针值的代表元素，而不是一个单一的元素是否正确？

1. Is the return of encrypt allocated memory?
2. If #1 is true, how is the memory allocated
3. Can you give a basic description on how the parameters work?
4. I'm guessing that all of the pointer values represents arrays / groups of elements instead of a single element correct?

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