path: root/src/jsifier.js

// Convert analyzed data to javascript. Everything has already been calculated
// before this stage, which just does the final conversion to JavaScript.

// Main function
function JSify(data, functionsOnly, givenFunctions, givenGlobalVariables) {
  // Does simple 'macro' substitution, using Django-like syntax,
  // {{{ code }}} will be replaced with |eval(code)|.
  function processMacros(text) {
    return text.replace(/{{{[^}]+}}}/g, function(str) {
      str = str.substr(3, str.length-6);
      return eval(str).toString();
    });
  }

  substrate = new Substrate('JSifyer');

  var GLOBAL_VARIABLES = functionsOnly ? givenGlobalVariables : data.globalVariables;

  Functions.currFunctions = functionsOnly ? givenFunctions : {};
  // Now that analysis has completed, we can get around to handling unparsedFunctions
  (functionsOnly ? data.functions : data.unparsedFunctions.concat(data.functions)).forEach(function(func) {
    // Save just what we need, to save memory - whether there are varargs, and the # of parameters
    Functions.currFunctions[func.ident] = {
      hasVarArgs: func.hasVarArgs,
      numParams: func.params.length
   };
  });

  for (var i = 0; i < data.unparsedFunctions.length; i++) {
    var func = data.unparsedFunctions[i];
    dprint('unparsedFunctions', '====================\n// Processing |' + func.ident + '|, ' + i + '/' + data.unparsedFunctions.length);
    //var t = Date.now();
    func.JS = JSify(analyzer(intertyper(func.lines, true, func.lineNum-1)), true, Functions.currFunctions, GLOBAL_VARIABLES);
    //t = (Date.now()-t)/1000;
    //dprint('unparsedFunctions', 'unparsedFunction took ' + t + ' seconds.');
    delete func.lines; // clean up memory as much as possible
  }

  if (data.unparsedFunctions.length > 0) {
    // We are now doing the final JS generation
    dprint('unparsedFunctions', '== Completed unparsedFunctions ==\n');
    Debugging.clear(); // Save some memory, before the final heavy lifting
  }

  // Actors

  // type
  substrate.addActor('Type', {
    processItem: function(item) {
      var type = Types.types[item.name_];
      var niceName = toNiceIdent(item.name_);
      // We might export all of Types.types, cleaner that way, but do not want slowdowns in accessing flatteners
      item.JS = 'var ' + niceName + '___SIZE = ' + Types.types[item.name_].flatSize + '; // ' + item.name_ + '\n';
      if (type.needsFlattening && !type.flatFactor) {
        item.JS += 'var ' + niceName + '___FLATTENER = ' + JSON.stringify(Types.types[item.name_].flatIndexes) + ';';
      }
      return [item];
    }
  });

  function makeEmptyStruct(type) {
    var ret = [];
    var typeData = Types.types[type];
    assertTrue(typeData);
    for (var i = 0; i < typeData.flatSize; i++) {
      ret.push(0);
    }
    return ret;
  }

  function alignStruct(values, type) {
    var typeData = Types.types[type];
    assertTrue(typeData);
    var ret = [];
    var i = 0, soFar = 0;
    while (i < values.length) {
      // Pad until the right place
      var padded = typeData.flatFactor ? typeData.flatFactor*i : typeData.flatIndexes[i];
      while (soFar < padded) {
        ret.push(0);
        soFar++;
      }
      // Add current value(s)
      var currValue = flatten(values[i]);