C在Win DLL中将LPBYTE更改为无符号char*以LinuxSO转换后的编译器错误

Question

我正在将Windows动态链接库转换为Linux动态链接库。我已经将所有类型的字节转换为无符号字符，将LPBYTE转换为无信号字符*。

编译器在一个函数中给了我如下错误：

错误：从“字符*”到“无符号字符”的转换无效

错误:从“unsigned char”到“unsigned char*”的转换无效

具体来说，在这两行：

if (DataLineIndexOverlap){
    OverlapSize = m_NrofDataLines*m_PosPerSector*m_PosPerSector;
    MirrorDataLineIndexOverlap = new unsigned char[OverlapSize];
}

OverrapSize被定义为int，MirrorDataLineIndexOverap在原始Windows代码中是LPBYTE，现在是无符号char*，新的无符号char[OverladSize]在原始Windows代码中是新的BYTE[OverrapSize]。之后还有其他错误，它们都与MirrorDataLineIndexOverap有关，因此我假设初始的Inathtml" target="_blank">ional Conversion错误是根本原因。

我正在寻找最干净的方法来解决这个编译器错误和其他类似的错误，而不破坏其余的代码。在LinuxC中是否有一个干净的LPBYTE替代品，可以在编译时不出现我看到的错误？

完整功能如下:

int CABC_DecodeCode::MirrorCheck(unsigned char* DataLineIndex, bool bThickLines, unsigned char* DataLineIndexOverlap, double *pSecondBestOverlapSum, unsigned int *pResultFlags)
{
    int i, OverlapSize, NoMirrorDataLineSum, MirrorDataLineSum;
    unsigned char* MirrorDataLineIndex, MirrorDataLineIndexOverlap;
    double *pNoMirrorSecondBestOverlapSum, *pMirrorSecondBestOverlapSum;

    MirrorDataLineIndex            = NULL;
    MirrorDataLineIndexOverlap     = NULL;

    NoMirrorDataLineSum            = 0;
    MirrorDataLineSum              = 0;

    if (pSecondBestOverlapSum)
    {
        pNoMirrorSecondBestOverlapSum   = new double;
        pMirrorSecondBestOverlapSum     = new double;

        *pNoMirrorSecondBestOverlapSum  = 0.0;
        *pMirrorSecondBestOverlapSum    = 0.0;
    }

    // normal decode
    for (i=0; i<m_NrofDataLines; i++)
        DataLineIndex[i] = GetDataLineIndex(i, bThickLines, DataLineIndexOverlap, pNoMirrorSecondBestOverlapSum, &NoMirrorDataLineSum);

    FlipCode();

    // flipped image decode
    MirrorDataLineIndex            = new unsigned char[m_NrofDataLines];

    if (DataLineIndexOverlap)
    {
        OverlapSize = m_NrofDataLines*m_PosPerSector*m_PosPerSector;
        MirrorDataLineIndexOverlap  = new unsigned char[OverlapSize];

    }

    for (i=0; i<m_NrofDataLines; i++)
        MirrorDataLineIndex[i] = GetDataLineIndex(i, bThickLines, MirrorDataLineIndexOverlap, pMirrorSecondBestOverlapSum, &MirrorDataLineSum);


    if (MirrorDataLineSum < NoMirrorDataLineSum)
    {
        if (pResultFlags)
            *pResultFlags |= RF_MIRRORRED_CODE;

        memcpy(DataLineIndex, MirrorDataLineIndex, m_NrofDataLines);

        if (DataLineIndexOverlap)
            memcpy(DataLineIndexOverlap, MirrorDataLineIndexOverlap, OverlapSize);

        if (pSecondBestOverlapSum)
            *pSecondBestOverlapSum = *pMirrorSecondBestOverlapSum;
    }
    else
    {
        FlipCode();

        if (pResultFlags)
            *pResultFlags &= ~RF_MIRRORRED_CODE;

        if (pSecondBestOverlapSum)
            *pSecondBestOverlapSum = *pNoMirrorSecondBestOverlapSum;
    }

    delete [] MirrorDataLineIndex;

    if (MirrorDataLineIndexOverlap)
        delete [] MirrorDataLineIndexOverlap;

    if (pMirrorSecondBestOverlapSum)
        delete pMirrorSecondBestOverlapSum;

    if (pNoMirrorSecondBestOverlapSum)
        delete pNoMirrorSecondBestOverlapSum;

    return 1;
}

Answer 1

此行

unsigned char* MirrorDataLineIndex, MirrorDataLineIndexOverlap;

相当于

unsigned char *MirrorDataLineIndex;
unsigned char MirrorDataLineIndexOverlap;

也许这不是我们的本意。

您可以考虑使用

typedef unsigned char BYTE;
typedef BYTE *LPBYTE;

Answer 2

unsigned char* MirrorDataLineIndex, MirrorDataLineIndexOverlap;

这将 MirrorDataLineIndex 声明为无符号 char *，MirrorDataLineIndexOverlap 声明为未签名 char。替换为：

unsigned char *MirrorDataLineIndex, *MirrorDataLineIndexOverlap;