需要使用TD1 ** TD1Hdl变量的帮助(LabVIEW) [英] Need help using TD1 **TD1Hdl variable (LabVIEW)

问题描述

所以我从LabView vi生成了一个.dll.我要使用的变量声明如下:

So I generated a .dll from a LabView vi. The variable I''m trying to use is declared as follows:

typedef struct {
	long dimSize;
	LStrHandle elt[1];
	} TD1;
typedef TD1 **TD1Hdl;

我要调用的函数是:

The function I want to call is:

void __cdecl getFileList(TD1Hdl *SpecResults);

根据LabView，SpecResults是我可以使用的输出变量(它是vi中的数组).

我已经用它编译了几种不同的方法，但是无论我做什么，我都无法检索到我需要的数据(dimSize和elt).

这是我得到的最接近的东西:

where, according to LabView, SpecResults is an output variable that I can use (it is an array in the vi).

I have gotten it to compile several different ways, but no matter what I do, I can''t retrieve the data I need (dimSize and elt).

Here is the closest I''ve gotten:

int main(int argc, char *argv[])
{
   TD1 *tdptr = (TD1 *)malloc(sizeof(long) + (6 * sizeof(LStrHandle))); // the array I''m getting has 6 elements
   TD1Hdl tdhdl = &tdptr;

   SetupWO();
   getFileList(&tdhdl);

   return 0;
}

使用tdptr和tdhdl的手表进行调试时，两者均显示未找到符号".

SetupWO()启动主vi，getFileList是子vi.

在此先感谢您的帮助.


添加行

Debugging with watches for tdptr and tdhdl says "symbol not found" for both.

SetupWO() starts the main vi, getFileList is a subvi.

Thanks in advance for any help.


Adding the lines

if(tdptr = NULL)
   return 0;
else
   printf("memory allocated");

在声明tdptr之后立即给出dimSize = ???并且elt = 0x00000004，我想这比我得到的要好一些?我不知道，因为我整周都在努力研究，所以我需要弄清楚这个问题，直到我这样做之前，我无法再取得任何进步.非常感谢您提供任何帮助...

right after tdptr is declared gives dimSize = ??? and elt = 0x00000004, which I guess is a little better than what I was getting? I don''t know, I need to get this figured out as I''ve been working on it all week and I can''t make any more progress until I do. Any help is greatly appreciated...

推荐答案

不幸的是，这些面板上没有得到任何答案，但我或多或少都知道了.我将发布代码，以防将来有人遇到类似问题.现在已分成几类，因此看起来有些不同.


wrapper.h:

Unfortunately didn''t get any answers on these boards but I have it more or less figured out. I''ll post the code in case anyone has a similar problem in the future. It''s separated into classes now so it looks a little different.


wrapper.h:

#include <ansi_c.h>
#include <labviewLib.h>
#include <iostream>
#include <stdlib.h>
#include "createMPTfile.h"

using namespace std;

class wrapper
{
public:
    void run();
    ~wrapper(){delete create;}

private:
    void LStrToCStr(LStrHandle lstr, char *cStrBuff, long buffLen);

    TD1 tdptr;
    TD1Hdl tdhdl;
};

wrapper.cpp:

wrapper.cpp:

#include "wrapper.h"

void wrapper::run()
{
    tdhdl = NULL;

    SetupWO();
    getFileList(&tdhdl);

    tdptr.dimSize = (*tdhdl)->dimSize;
    for(int i = 0; i < tdptr.dimSize; i++)
    {
        tdptr.elt[i] = (*tdhdl)->elt[i];

        char atpString[256];
        LStrToCStr(tdptr.elt[i], atpString, 256);
        printf(atpString);
        printf("\n");
    }
}

void wrapper::LStrToCStr(LStrHandle lstr, char* cStrBuff, long buffLen)
{
    int32 len = LHStrLen(lstr);
        if(len >= buffLen)
            len = buffLen - 1;

    memcpy(cStrBuff, LHStrBuf(lstr), len);
    cStrBuff[len] = 0;
}

这篇关于需要使用TD1 ** TD1Hdl变量的帮助(LabVIEW)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！