IDebugBreakpointChecksumRequest2::GetChecksum

根據要使用的總和檢查碼演算法的唯一標識符，擷取斷點要求的檔總和檢查碼。

語法

C#

public int GetChecksum(
    ref Guid               guidAlgorithm,
    out enum_CHECKSUM_DATA pChecksumData
);

C++

HRESULT GetChecksum(
    REFGUID        guidAlgorithm,
    CHECKSUM_DATA *pChecksumData
);

參數

guidAlgorithm
[in]總和檢查碼演算法的唯一標識碼。

pChecksumData
[out]記錄斷點要求的總和檢查碼。

傳回值

如果成功，則會傳回 S_OK；否則，會傳回錯誤碼。

範例

下列範例示範的函式會檢查即將系結的檔總和檢查碼是否符合 UI 中的總和檢查碼。

bool CDebugProgram::DoChecksumsMatch(CDebugPendingBreakpoint *pPending, CDebugCodeContext *pContext)
{
    bool fRet = false;
    HRESULT hRes;

    // Get the checksum for the document we are about to bind to from the pdb side
    GUID guidAlgorithmId;
    BYTE *pChecksum = NULL;
    ULONG cNumBytes = 0;

    hRes = pContext->GetDocumentChecksumAndAlgorithmId(&guidAlgorithmId, &pChecksum, &cNumBytes);

    if ( S_OK == hRes )
    {
        // Get checksum data for the document from the UI (request) side
        CComPtr<IDebugBreakpointChecksumRequest2> pChecksumRequest;

        hRes = pPending->GetChecksumRequest(&pChecksumRequest);

        if ( S_OK == hRes )
        {
            CHECKSUM_DATA data;

            hRes = pChecksumRequest->GetChecksum(guidAlgorithmId, &data);

            if ( S_OK == hRes )
            {
                if ( data.ByteCount == cNumBytes && memcmp(data.pBytes, pChecksum, cNumBytes) == 0 )
                    fRet = true;
                else
                    fRet = false;

                // Free up data allocated for checksum data
                CoTaskMemFree(data.pBytes);
            }
            else
                fRet = true; // checksums not available - user disabed checksums
        }
        else
            fRet = true; // we couldn't get checksum from UI - default to past behavior

        // free up space allocated for checksum from pdb
        CoTaskMemFree(pChecksum);
    }
    else
        fRet = true; // we don't have a checksum to compare with.

    return ( fRet );
}

另請參閱

• IDebugBreakpointChecksumRequest2