Converter::FormatList Converter::Compile ( std::ostream &  out, const std::string &  fmt, bool  strict = false  )

static

static function to compile a format string.

Parameters

out	Output stream to which possible logging is redirected
fmt	Format to be compiled. For details see class reference
strict	Setting this to true allows non DIM options, whiel false will restrict the possible format strings to the ones also understood by DIM.

Definition at line 774 of file Converter.cc.

References buffer, kRed, and t.

Referenced by Compile(), and GetSize().

{
    ostringstream text;

    // Access both, the data and the format through a stringstream
    stringstream stream(fmt);

    // For better performance we could use sregex
    static const boost::regex expr1("^([CSILFDXBOW])(:([1-9]+[0-9]*))?$");
    static const boost::regex expr2("^([CSILFDX])(:([1-9]+[0-9]*))?$");

    FormatList list;
    Format   format;

    // Tokenize the format
    string buffer;
    while (getline(stream, buffer, ';'))
    {
        boost::smatch what;
        if (!boost::regex_match(buffer, what, strict?expr2:expr1))
        {
            out << kRed << "Wrong format string '" << buffer << "'!" << endl;
            return FormatList();
        }

        const string t = what[1]; // type id
        const string n = what[3]; // counter

        const int cnt = n.empty() ? 0 : stoi(n);

        // if the :N part was not given assume 1
        format.second.first = cnt == 0 ? 1 : cnt;

        /*
        if (strict && t[0]=='C' && cnt>0)
        {
            out << kRed << "Dim doesn't support the format C with N>0!" << endl;
            return FormatList();
        }*/

        // Check if the format is just C (without a number)
        // That would mean that it is a \0 terminated string
        if (t[0]=='C' && cnt==0)
        {
            format.first = GetType<string>();
            list.push_back(format);
            format.second.second = 0; // end position not known
            break;
        }

        // Get as many items from the input line as requested
        switch (t[0])
        {
        case 'B':  format.first = GetType<bool>();      break;
        case 'C':  format.first = GetType<char>();      break;
        case 'S':  format.first = GetType<short>();     break;
        case 'I':  format.first = GetType<int>();       break;
        case 'L':  format.first = GetType<long>();      break;
        case 'F':  format.first = GetType<float>();     break;
        case 'D':  format.first = GetType<double>();    break;
        case 'X':  format.first = GetType<long long>(); break;
        case 'O':  format.first = GetVoid<O>();         break;
        case 'W':  format.first = GetVoid<W>();         break;
        default:
            // This should never happen!
            out << kRed << "Format '" << t[0] << " not known!" << endl;
            return list;
        }

        list.push_back(format);
        format.second.second += format.first.second * format.second.first;
    }

    format.first = GetVoid<void>();
    format.second.first = 0;

    list.push_back(format);

    return list;
}

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