Hex Converter

• Download source files - 19 Kb

Introduction

This is a simple COM component that converts a lump of binary/text data to the hex format. I just wrote it for one of my projects to have a look at the binary data. The component supports only two interfaces; IHexConverter and ISupportErrorInfo, with four methods. It's been developed on Win98, with VC++ 6.0. It's very simple in use, and I thought it might be useful for others.

Methods

SetFile([in] BSTR bstrFilePath);
SetString([in] BSTR bstrInput);
GetLineCount([out] long* pLineCount)
GetNextLine([out] BSTR* pbstrOutput)

Typical Usage (in C++):

    ::CoInitialize(NULL);

    IHexConvertor* pHC = NULL;
    HRESULT hr = CoCreateInstance(CLSID_HexConverter,
                                 CLSTX_INPROC_SERVER,
                                 IID_IHexConverter,
                                 (void**)&pHC);
    
    //Set the input file / string
    CComBSTR bstrFile(_T("C:\MyFile.dat"))
    hr = pHC->SetFile(bstrFile); 

or

    CComBSTR bstrInput(_T("blah........blah............"));
    hr = pHC->SetString(bstrString);

    //get the total no. of lines in the output string (containing 16 bytes each)
    long lLines;
    hr = pHC->GetLineCount(&iLines);
    
    //get each line
    for(int i = 0; i < iLines; i++)
    {
        CComBSTR bstrOutput;
        hr = pHC->GetNextLine(&bstrOutput);
    }

    pHC->Release();
    pHC = NULL;

    ::CoUnInitialize();

You need to register the component before use. If you spot any problems or possible enhancements please let me know at [Mukesh Gupta].

References:

• Windows Programming With MFC By: Jeff Prosise