Function eval

src/modules/pythonmonkey/pythonmonkey.cc:379–503

* Implement the pythonmonkey.eval function. From Python-land, that function has the following API: * argument 0 - unicode string of JS code or open file containing JS code in UTF-8 * argument 1 - a Dict of options which roughly correspond to the jsapi CompileOptions. A novel option, * fromPythonFrame, sets the filename and line offset according to the pm.eval call in the *

 *              and still get stack dumps which point to the source code.
 */
static PyObject *eval(PyObject *self, PyObject *args) {
  size_t argc = PyTuple_GET_SIZE(args);
  if (argc > 2 || argc == 0) {
    PyErr_SetString(PyExc_TypeError, "pythonmonkey.eval accepts one or two arguments");
    return NULL;
  }

  PyObject *code = NULL;
  FILE *file = NULL;
  PyObject *arg0 = PyTuple_GetItem(args, 0);
  PyObject *arg1 = argc == 2 ? PyTuple_GetItem(args, 1) : NULL;

  if (PyUnicode_Check(arg0)) {
    code = arg0;
  } else if (1 /*PyFile_Check(arg0)*/) {
    /* First argument is an open file. Open a stream with a dup of the underlying fd (so we can fclose
     * the stream later). Future: seek to current Python file position IFF the fd is for a real file.
     */
    int fd = PyObject_AsFileDescriptor(arg0);
    int fd2 = fd == -1 ? -1 : dup(fd);
    file = fd2 == -1 ? NULL : fdopen(fd, "rb");
    if (!file) {
      PyErr_SetString(PyExc_TypeError, "error opening file stream");
      return NULL;
    }
  } else {
    PyErr_SetString(PyExc_TypeError, "pythonmonkey.eval expects either a string or an open file as its first argument");
    return NULL;
  }

  PyObject *evalOptions = argc == 2 ? arg1 : NULL;
  if (evalOptions && !PyDict_Check(evalOptions)) {
    PyErr_SetString(PyExc_TypeError, "pythonmonkey.eval expects a dict as its second argument");
    if (file)
      fclose(file);
    return NULL;
  }

  // initialize JS context
  JSAutoRealm ar(GLOBAL_CX, *global);
  JS::CompileOptions options (GLOBAL_CX);
  options.setFileAndLine("evaluate", 1)
  .setIsRunOnce(true)
  .setNoScriptRval(false)
  .setIntroductionType("pythonmonkey eval");

  if (evalOptions) {
    const char *s;
    unsigned long l;
    bool b;

    if (getEvalOption(evalOptions, "filename", &s)) options.setFile(s);
    if (getEvalOption(evalOptions, "lineno", &l)) options.setLine(l);
    if (getEvalOption(evalOptions, "column", &l)) options.setColumn(JS::ColumnNumberOneOrigin(l));
    if (getEvalOption(evalOptions, "mutedErrors", &b)) options.setMutedErrors(b);
    if (getEvalOption(evalOptions, "noScriptRval", &b)) options.setNoScriptRval(b);
    if (getEvalOption(evalOptions, "selfHosting", &b)) options.setSelfHostingMode(b);
    if (getEvalOption(evalOptions, "strict", &b)) if (b) options.setForceStrictMode();