Function PercentDecode

Source/MediaInfo/Reader/Reader_libcurl.cpp:242–285

    return Result;
}
string PercentDecode(const string& In)
{
    string Result;
    Result.reserve(In.size());
    for (string::size_type i=0; i<In.size(); i++)
    {
        char C=In[i];
        switch (C)
        {
            case '%':
            {
                if (i+2>In.size())
                    return In;
                char C1=In[++i];
                if (!((C1>='0' && C1<='9')
                   || (C1>='A' && C1<='F')
                   || (C1>='a' && C1<='f')))
                    return In;
                char C2=In[++i];
                if (!((C2>='0' && C2<='9')
                   || (C2>='A' && C2<='F')
                   || (C2>='a' && C2<='f')))
                    return In;
                if (C1>='a')
                    C1-='a'-10;
                else if (C1>='A')
                    C1-='A'-10;
                else
                    C1-='0';
                if (C2>='a')
                    C2-='a'-10;
                else if (C2>='A')
                    C2-='A'-10;
                else
                    C2-='0';
                Result+=(const char)((C1<<4)|C2);
                continue;
            }
            default:
                Result+=C;
        }
    }
    return Result;
}
MediaInfo_Config::urlencode DetectPercentEncode(const string& In, bool AcceptSlash=false)
{
    MediaInfo_Config::urlencode Result=MediaInfo_Config::URLEncode_Guess;