如何在实现xfs的C++中动态填充指向数组指针的结构

Question

结构一：

typedef struct _wfs_cdm_cu_info
{
    USHORT usTellerID;
    USHORT usCount;
    LPWFSCDMCASHUNIT * lppList;
} WFSCDMCUINFO, * LPWFSCDMCUINFO;

结构二：

typedef struct _wfs_cdm_cashunit
{
    USHORT usNumber;
    USHORT usType;
    LPSTR lpszCashUnitName;
    CHAR cUnitID[5];
    CHAR cCurrencyID[3];
    ULONG ulValues;
    ULONG ulInitialCount;
    ULONG ulCount;
    ULONG ulRejectCount;
    ULONG ulMinimum;
    ULONG ulMaximum;
    BOOL bAppLock;
    USHORT usStatus;
    USHORT usNumPhysicalCUs;
    LPWFSCDMPHCU * lppPhysical;
} WFSCDMCASHUNIT, * LPWFSCDMCASHUNIT;

结构 3：

typedef struct _wfs_cdm_physicalcu
{
    LPSTR lpPhysicalPositionName;
    CHAR cUnitID[5];
    ULONG ulInitialCount;
    ULONG ulCount;
    ULONG ulRejectCount;
    ULONG ulMaximum;
    USHORT usPStatus;
    BOOL bHardwareSensor;
} WFSCDMPHCU, * LPWFSCDMPHCU;

代码：

 LPWFSCDMCUINFO lpWFSCDMCuinf = NULL;   
LPWFSCDMCASHUNIT lpWFSCDMCashUnit =  NULL;   
LPWFSCDMPHCU   lpWFSCDMPhcu = NULL;   
int i=0;
try
 {
    hResult = WFMAllocateBuffer(sizeof(WFSCDMCUINFO),WFS_MEM_ZEROINIT|WFS_MEM_SHARE,(void**)&lpWFSCDMCuinf); 
    lpWFSCDMCuinf->usCount =7;   
    lpWFSCDMCuinf->usTellerID = 0;          
    hResult = WFMAllocateMore(7*sizeof(LPWFSCDMCASHUNIT),lpWFSCDMCuinf,(void**)&lpWFSCDMCuinf->lppList);   
    for(i=0;i<7;i++)
    {
        LPWFSCDMCASHUNIT   lpWFSCDMCashUnit = NULL; 
         hResult = WFMAllocateMore(sizeof(WFSCDMCASHUNIT), lpWFSCDMCuinf, (void**)&lpWFSCDMCashUnit);
        lpWFSCDMCuinf->lppList[i] = lpWFSCDMCashUnit;//store the pointer
        //FILLING CASH UNIT
        -----------------------------
         lpWFSCDMCashUnit->ulValues =50;
        -----------------------------
        WFMAllocateMore(1* sizeof(LPWFSCDMPHCU), lpWFSCDMCuinf, (void**)&lpWFSCDMCashUnit->lppPhysical);// Allocate Physical Unit structure
        for(int j=0;j<1;j++)
        {
            LPWFSCDMPHCU   lpWFSCDMPhcu = NULL;  
            hResult = WFMAllocateMore(sizeof(WFSCDMPHCU), lpWFSCDMCuinf, (void**)&lpWFSCDMPhcu);
            lpWFSCDMCashUnit->lppPhysical[j] = lpWFSCDMPhcu;

            //FILLING Phy CASHUNIT
            -------------------------------------------------------
            lpWFSCDMPhcu->ulMaximum = 2000; 
             -----------------------------
        }

    }

    //lpWFSCDMCuinf->lppList=&lpWFSCDMCashUnit;
    hResult =WFSExecute (hService,WFS_CMD_CDM_END_EXCHANGE,(LPVOID)&lpWFSCDMCuinf,60000,&lppResult);
    return (int)hResult;

我在检索结构 1 中的所有值时卡住了。我需要将值动态添加到这些结构中并显示 Structure1，因为 output.An 需要为 this.I 分配内存已尝试使用上面的代码分配内存，但尽管分配了值未正确存储在结构中。

usCount的值根据面额设置而变化。基于此设置usNumPhysicalCUs。此外，当我在 WFSExecute 方法中发送 &lpWFSCDMCuinf 时，lppPhysical 似乎是空的。

我无法确切地弄清楚我哪里出错了。

Answer 1

首先你必须为每个块分配内存。对于指针数组，您将分配内存来存储指针的计数，而不是对于分配内存中的每个指针，您必须为结构本身分配内存。我以更简短的形式重写了您的代码。没有错误检查，此代码只是示例。

LPWFSCDMCUINFO lpWFSCDMCuinf = NULL;
HRESULT hr = WFMAllocateBuffer(sizeof(WFSCDMCUINFO), WFS_MEM_ZEROINIT|WFS_MEM_SHARE, (void**)&lpWFSCDMCuinf);
// Allocate 7 times of WFSCDMCASHUNIT
const int cuCount = 7;
lpWFSCDMCuinf->usCount = cuCount;
hr = WFMAllocateMore(cuCount * sizeof(LPWFSCDMCASHUNIT), lpWFSCDMCuinf, (void**)&lpWFSCDMCuinf->lppList);
for (int i=0; i < cuCount; i++) 
{
    // for one entry
    LPWFSCDMCASHUNIT currentCU = NULL;
    hr = WFMAllocateMore(sizeof(WFSCDMCASHUNIT), lpWFSCDMCuinf, (void**)&currentCU);
    // Store pinter
    lpWFSCDMCuinf->lppList[i] = currentCU;
    // Fill current CU data here
    // ....

    // Allocate Phisical Unit Pointers
    const int phuCount = 1;
    currentCU->usNumPhysicalCUs = phuCount;
    WFMAllocateMore(phuCount * sizeof(LPWFSCDMPHCU), lpWFSCDMCuinf, (void**)&currentCU->lppPhysical);
    // Allocate Phisical Unit structure
    for (int j=0; j < phuCount; j++)
    {
        LPWFSCDMPHCU phuCurrent = NULL;
        // Allocate Phisical Unit structure
        WFMAllocateMore(sizeof(WFSCDMPHCU), lpWFSCDMCuinf, (void**)&phuCurrent);
        currentCU->lppPhysical[j] = phuCurrent;
        // Fill Phisical Unit here
        // ..
        // ..
    }
}

除此示例外，我建议您编写一些辅助函数来分配 XFS 结构，如 WFSCDMCUINFO。在我自己的项目中，我使用一些宏通过 WFMAllocate 和 WFMAllocateMore 函数序列化内存中的 XFS 结构。 XFS 结构非常复杂，不同于 class 和 class。我写了一些宏来序列化和反序列化内存流和 XFS 内存缓冲区中的结构。在应用程序中，我使用堆分配在内存中存储 XFS 结构，但是当我需要在另一个 XFS 消息中 return 结构时，我需要使用 WFMAllocate 和 WFMAllocateMore 将内存缓冲区传输到 XFS 内存。

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