amend bash.h; add example_builtin.c

bash.h

@@ -34,32 +34,29 @@ extern char **make_builtin_argv(WORD_LIST*, int*);
       PyImport_AppendInittab(#modname, PyInit_##modname); \
       Py_Initialize(); \
     } \
-    int _##bash_name(int argc, char **argv) { \
+    int ret = 1; \
-      int ret = 1; \
+    PyObject *mod = NULL, *func = NULL, *result; \
-      PyObject *mod = NULL, *func = NULL, *result; \
+    \
-      \
+    mod = PyImport_ImportModule(#modname); \
-      mod = PyImport_ImportModule(#modname); \
+    func = PyObject_GetAttrString(mod, #function); \
-      func = PyObject_GetAttrString(mod, #function); \
+    \
-      \
+    PyObject *py_argv = PyTuple_New(argc - 1); \
-      PyObject *py_argv = PyTuple_New(argc - 1); \
+    \
-      \
+    for (int i = 1; i < argc; i++) { \
-      for (int i = 1; i < argc; i++) { \
+      PyObject *arg_as_str = PyUnicode_FromString(argv[i]); \
-        PyObject *arg_as_str = PyUnicode_FromString(argv[i]); \
+      PyTuple_SetItem(py_argv, i-1, arg_as_str); \
-        PyTuple_SetItem(py_argv, i-1, arg_as_str); \
-      } \
-      \
-      result = PyObject_CallObject(func, py_argv); \
-      if (!result) { PyErr_Print(); goto finally; } \
-      ret = (int) PyFloat_AsDouble(result); \
-      \
-    finally: \
-      Py_XDECREF(result); \
-      Py_XDECREF(py_argv); \
-      Py_XDECREF(func); \
-      Py_XDECREF(mod); \
-      return ret; \
     } \
-    return _##bash_name(argc, argv); \
+    \
+    result = PyObject_CallObject(func, py_argv); \
+    if (!result) { PyErr_Print(); goto finally; } \
+    ret = (int) PyFloat_AsDouble(result); \
+    \
+  finally: \
+    Py_XDECREF(result); \
+    Py_XDECREF(py_argv); \
+    Py_XDECREF(func); \
+    Py_XDECREF(mod); \
+    return ret; \
   } \
   WRAP_FUNC_WITH_BUILTIN(bash_name); \
   DEFINE_BUILTIN(bash_name);

example_builtin.c

@@ -3,4 +3,4 @@
 
 PY_FUNC(foo, foo, _foo);
 PY_FUNC(bar, foo, _bar);
-PY_FUNC(graph, foo, _complicated_function);
+PY_FUNC(graph, bar, _complicated_function);