index.js

function parse(str) {
  if(typeof str !== 'string') {
    str = str.toString();
  }

  var title = null;
  var type = null;
  var size = 0;
  var domain = [[0.0, 0.0, 0.0], [1.0, 1.0, 1.0]];
  var data = [];

  var lines = str.split('\n');

  for(var i=0; i<lines.length; i++) {
    var line = lines[i].trim();

    if(line[0] === '#' || line === '') {
      // Skip comments and empty lines
      continue;
    }

    var parts = line.split(/\s+/);

    switch(parts[0]) {
      case 'TITLE':
        title = line.slice(7, -1);
        break;
      case 'DOMAIN_MIN':
        domain[0] = parts.slice(1).map(Number);
        break;
      case 'DOMAIN_MAX':
        domain[1] = parts.slice(1).map(Number);
        break;
      case 'LUT_1D_SIZE':
        type = '1D';
        size = Number(parts[1]);
        break;
      case 'LUT_3D_SIZE':
        type = '3D';
        size = Number(parts[1]);
        break;
      default:
        data.push(parts.map(Number));
    }
  }

  return {
    title: title,
    type: type,
    size: size,
    domain: domain,
    data: data
  };
}

module.exports = parse;