Method read

src/OpenColorIO/fileformats/FileFormat3DL.cpp:236–485

// Raise an exception if it can't be loaded.

CachedFileRcPtr LocalFileFormat::read(std::istream & istream,
                                      const std::string & /* fileName unused */,
                                      Interpolation interp) const
{
    std::vector<int> rawshaper;
    std::vector<int> raw3d;

    int lut3dmax = 0;

    // Parse the file 3D LUT data to an int array.
    {
        const int MAX_LINE_SIZE = 4096;
        char lineBuffer[MAX_LINE_SIZE];

        StringUtils::StringVec lineParts;
        std::vector<int> tmpData;

        int lineNumber = 0;

        while(istream.good())
        {
            istream.getline(lineBuffer, MAX_LINE_SIZE);
            ++lineNumber;

            // Strip and split the line.
            lineParts = StringUtils::SplitByWhiteSpaces(StringUtils::Trim(lineBuffer));

            if(lineParts.empty()) continue;
            if (lineParts.size() > 0)
            {
                if (StringUtils::StartsWith(lineParts[0], '#'))
                {
                    continue;
                }
                if (StringUtils::StartsWith(lineParts[0], '<'))
                {
                    // Format error: reject files that could be
                    // formatted as xml.
                    std::ostringstream os;
                    os << "Error parsing .3dl file. ";
                    os << "Not expecting a line starting with \"<\".";
                    os << "Line (" << lineNumber << "): '";
                    os << lineBuffer << "'.";
                    throw Exception(os.str().c_str());
                }
            }

            // If we haven't found a list of ints, continue.
            if (!StringVecToIntVec(tmpData, lineParts))
            {
                // Some keywords are valid (3DMESH, mesh, gamma, LUT*)
                // but others could be format error.
                // To preserve v1 behavior, don't reject them.
                continue;
            }

            // If we've found more than 3 ints, and dont have
            // a shaper LUT yet, we've got it!