UTF到UNICODE编码转换

inline bool UTF2UNICODE(const char* src, CString &t)
{
    if (src == NULL)
    {
        ASSERT(FALSE);
        return false;
    }

    int size_s = (int)strlen(src);
    int size_d = size_s + 10;          //?

    wchar_t *des = new wchar_t[size_d];
    memset(des, 0, size_d * sizeof(wchar_t));

    int s = 0, d = 0;
    bool toomuchbyte = true; //set true to skip error prefix.

    while (s < size_s && d < size_d)
    {
        unsigned char c = src[s];
        if ((c & 0x80) == 0)
        {
            des[d++] += src[s++];
        }
        else if((c & 0xE0) == 0xC0)  ///< 110x-xxxx 10xx-xxxx
        {
            WCHAR &wideChar = des[d++];
            wideChar  = (src[s + 0] & 0x3F) << 6;
            wideChar |= (src[s + 1] & 0x3F);

            s += 2;
        }
        else if((c & 0xF0) == 0xE0)  ///< 1110-xxxx 10xx-xxxx 10xx-xxxx
        {
            WCHAR &wideChar = des[d++];

            wideChar  = (src[s + 0] & 0x1F) << 12;
            wideChar |= (src[s + 1] & 0x3F) << 6;
            wideChar |= (src[s + 2] & 0x3F);

            s += 3;
        }
        else if((c & 0xF8) == 0xF0)  ///< 1111-0xxx 10xx-xxxx 10xx-xxxx 10xx-xxxx
        {
            WCHAR &wideChar = des[d++];

            wideChar  = (src[s + 0] & 0x0F) << 18;
            wideChar  = (src[s + 1] & 0x3F) << 12;
            wideChar |= (src[s + 2] & 0x3F) << 6;
            wideChar |= (src[s + 3] & 0x3F);

            s += 4;
        }
        else
        {
            WCHAR &wideChar = des[d++]; ///< 1111-10xx 10xx-xxxx 10xx-xxxx 10xx-xxxx 10xx-xxxx

            wideChar  = (src[s + 0] & 0x07) << 24;
            wideChar  = (src[s + 1] & 0x3F) << 18;
            wideChar  = (src[s + 2] & 0x3F) << 12;
            wideChar |= (src[s + 3] & 0x3F) << 6;
            wideChar |= (src[s + 4] & 0x3F);

            s += 5;
        }
    }

    t = des;
    delete[] des;
    des = NULL;

    return true;
}