コードページの識別 [MLang]

    // コードページの識別

    // IE5.0 or lator

    static HRESULT DetectCodePage(

        IStreamPtr spStream,

        std::vector<DWORD>& dwCodePages,

        DWORD dwFlag = MLDETECTCP_8BIT,

        DWORD dwPrefWinCodePage = 0)

    {

        HRESULT hr = S_OK;

        const int N = 32;                    // 最高32個まで候補を挙げる

        INT nScores = N;

        DetectEncodingInfo info[N];

        hr = DetectCodepageInIStream(

            dwFlag,

            dwPrefWinCodePage,

            spStream,

            info,

            &nScores);

        if (FAILED(hr))

        {

            return hr;

        }

        for (int i = 0; i < nScores; i++)

        {

            dwCodePages.push_back(info[i].nCodePage);

        }

        return S_OK;

    }

    // IE5.0 or lator

    static HRESULT DetectCodepageInIStream(

        DWORD dwFlag,

        DWORD dwPrefWinCodePage,

        IStream *pstmIn,

        DetectEncodingInfo *lpEncoding,

        INT *pnScores)

    {

        HRESULT hr = S_OK;

        try

        {

            IMultiLanguage2Ptr spMultiLanguage2 = GetMultiLanguage();

            if (spMultiLanguage2 == NULL)

            {

                return E_FAIL;

            }

            hr = spMultiLanguage2->DetectCodepageInIStream(

                dwFlag,

                dwPrefWinCodePage,

                pstmIn,

                lpEncoding,

                pnScores);

            if (FAILED(hr))

            {

                return hr;

            }

        }

        catch (...)

        {

            return E_FAIL;

        }

        return S_OK;

    }

    static IMultiLanguagePtr GetMultiLanguage()

    {

        HRESULT hr = S_OK;

        IMultiLanguagePtr spMultiLanguage;

        hr = spMultiLanguage.CreateInstance(__uuidof(CMultiLanguage));

        if (FAILED(hr))

        {

            return NULL;

        }

        return spMultiLanguage;

    }