如何围绕 C++ 代码编写 C 包装器以公开类方法 [英] how to write c wrapper around c++ code to expose class methods

问题描述

我在非托管 C++ 中有许多 cpp 文件，我想使用 P\Invoke 从 vb .net 访问这些文件的类方法，为此我编写了 C 包装器来公开类方法.任何人都可以帮助我，如何围绕 C++ 代码编写 ac 包装器.我正在复制我的文件的一些代码，请帮助我为这些函数编写 c 包装器.

I have number of cpp files in unmanaged c++ , I want to access class methods of these files from vb .net using P\Invoke, For that i have write C wrapper for exposing class methods.Can anybody help me ,how to write a c wrapper around C++ code. I am copying some code of my files ,please help me writting c wrapper for these function.

#include "StdAfx.h"
#include "Verify.h"

Verify::Verify(void)
    :_verified(false)
{
}

Verify::~Verify(void)
{
}

void Verify::SetVerified(bool value)
{
    _verified = value;
}

bool Verify::GetVerified(void) const
{
        _verified;
}

void Verify::SetFailurePoint(std::basic_string<TCHAR> const & value)
{
    _failurePoint = value;
}

std::basic_string<TCHAR> const & Verify::GetFailurePoint(void) const
{
    return _failurePoint;
}

推荐答案

在 wrapper.h 中:

In wrapper.h:

    typedef void * VERIFY_HANDLE;
    extern VERIFY_HANDLE Verify_Create();
    extern void VERIFY_SetVerified(VERIFY_HANDLE, bool);
    extern bool VERIFY_GetVerified(VERIFY_HANDLE);
    /* etc, etc */

在 wrapper.c 中:

In wrapper.c:

    #include "wrapper.h"
    #include "Verify.h"
    VERIFY_HANDLE Verify_Create() { return (VERIFY_HANDLE) new Verify(); }
    void SetVerified(VERIFY_HANDLE h, bool b) { ((Verify *)h)->SetVerified(b); }
    bool GetVerified(VERIFY_HANDLE h) { return ((Verify *)h)->GetVerified();  }

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