Function demangle

test/tests/emscripten/readdir_empty.js:981–1154

(func)

Module["lengthBytesUTF32"] = lengthBytesUTF32;

function demangle(func) {
  var hasLibcxxabi = !!Module['___cxa_demangle'];
  if (hasLibcxxabi) {
    try {
      var buf = _malloc(func.length);
      writeStringToMemory(func.substr(1), buf);
      var status = _malloc(4);
      var ret = Module['___cxa_demangle'](buf, 0, 0, status);
      if (getValue(status, 'i32') === 0 && ret) {
        return Pointer_stringify(ret);
      }
      // otherwise, libcxxabi failed, we can try ours which may return a partial result
    } catch(e) {
      // failure when using libcxxabi, we can try ours which may return a partial result
    } finally {
      if (buf) _free(buf);
      if (status) _free(status);
      if (ret) _free(ret);
    }
  }
  var i = 3;
  // params, etc.
  var basicTypes = {
    'v': 'void',
    'b': 'bool',
    'c': 'char',
    's': 'short',
    'i': 'int',
    'l': 'long',
    'f': 'float',
    'd': 'double',
    'w': 'wchar_t',
    'a': 'signed char',
    'h': 'unsigned char',
    't': 'unsigned short',
    'j': 'unsigned int',
    'm': 'unsigned long',
    'x': 'long long',
    'y': 'unsigned long long',
    'z': '...'
  };
  var subs = [];
  var first = true;
  function dump(x) {
    //return;
    if (x) Module.print(x);
    Module.print(func);
    var pre = '';
    for (var a = 0; a < i; a++) pre += ' ';
    Module.print (pre + '^');
  }
  function parseNested() {
    i++;
    if (func[i] === 'K') i++; // ignore const
    var parts = [];
    while (func[i] !== 'E') {
      if (func[i] === 'S') { // substitution
        i++;