|
static private ErrorCheck ( |
||
| pointer | Pointer to a Python object | |
| return | void | |
/// <summary>
/// Initialization performed on startup of the Python runtime.
/// </summary>
internal static void Initialize()
{
string exceptionsModuleName = Runtime.IsPython3 ? "builtins" : "exceptions";
exceptions_module = Runtime.PyImport_ImportModule(exceptionsModuleName);
Exceptions.ErrorCheck(exceptions_module);
warnings_module = Runtime.PyImport_ImportModule("warnings");
Exceptions.ErrorCheck(warnings_module);
Type type = typeof(Exceptions);
foreach (FieldInfo fi in type.GetFields(BindingFlags.Public | BindingFlags.Static))
{
IntPtr op = Runtime.PyObject_GetAttrString(exceptions_module, fi.Name);
if (op != IntPtr.Zero)
{
fi.SetValue(type, op);
}
else
{
fi.SetValue(type, IntPtr.Zero);
DebugUtil.Print($"Unknown exception: {fi.Name}");
}
}
Runtime.PyErr_Clear();
}
//====================================================================
// helper methods for raising warnings
//====================================================================
/// <summary>
/// Alias for Python's warnings.warn() function.
/// </summary>
public static void warn(string message, IntPtr exception, int stacklevel)
{
if (exception == IntPtr.Zero ||
(Runtime.PyObject_IsSubclass(exception, Exceptions.Warning) != 1))
{
Exceptions.RaiseTypeError("Invalid exception");
}
Runtime.XIncref(warnings_module);
IntPtr warn = Runtime.PyObject_GetAttrString(warnings_module, "warn");
Runtime.XDecref(warnings_module);
Exceptions.ErrorCheck(warn);
IntPtr args = Runtime.PyTuple_New(3);
IntPtr msg = Runtime.PyString_FromString(message);
Runtime.XIncref(exception); // PyTuple_SetItem steals a reference
IntPtr level = Runtime.PyInt_FromInt32(stacklevel);
Runtime.PyTuple_SetItem(args, 0, msg);
Runtime.PyTuple_SetItem(args, 1, exception);
Runtime.PyTuple_SetItem(args, 2, level);
IntPtr result = Runtime.PyObject_CallObject(warn, args);
Exceptions.ErrorCheck(result);
Runtime.XDecref(warn);
Runtime.XDecref(result);
Runtime.XDecref(args);
}
//===================================================================
// Initialization performed on startup of the Python runtime.
//===================================================================
internal static void Initialize()
{
#if (PYTHON32 || PYTHON33 || PYTHON34 || PYTHON35)
exceptions_module = Runtime.PyImport_ImportModule("builtins");
#else
exceptions_module = Runtime.PyImport_ImportModule("exceptions");
#endif
Exceptions.ErrorCheck(exceptions_module);
warnings_module = Runtime.PyImport_ImportModule("warnings");
Exceptions.ErrorCheck(warnings_module);
Type type = typeof(Exceptions);
foreach (FieldInfo fi in type.GetFields(BindingFlags.Public |
BindingFlags.Static))
{
IntPtr op = Runtime.PyObject_GetAttrString(exceptions_module, fi.Name);
if (op != IntPtr.Zero)
{
fi.SetValue(type, op);
}
else
{
fi.SetValue(type, IntPtr.Zero);
DebugUtil.Print("Unknown exception: " + fi.Name);
}
}
Runtime.PyErr_Clear();
}
internal static IntPtr GetExceptionInstanceWrapper(IntPtr real)
{
// Given the pointer to a new-style class instance representing a
// managed exception, return an appropriate old-style class
// wrapper instance that delegates to the wrapped instance.
IntPtr tp = Runtime.PyObject_TYPE(real);
if (Runtime.PyObject_TYPE(tp) == Runtime.PyInstanceType)
{
return(real);
}
// Get / generate a class wrapper, instantiate it and set its
// _inner attribute to the real new-style exception instance.
IntPtr ct = GetExceptionClassWrapper(tp);
Exceptions.ErrorCheck(ct);
IntPtr op = Runtime.PyInstance_NewRaw(ct, IntPtr.Zero);
Exceptions.ErrorCheck(op);
IntPtr d = Runtime.PyObject_GetAttrString(op, "__dict__");
Exceptions.ErrorCheck(d);
Runtime.PyDict_SetItemString(d, "_inner", real);
Runtime.Decref(d);
return(op);
}
//====================================================================
// helper methods for raising warnings
//====================================================================
/// <summary>
/// Alias for Python's warnings.warn() function.
/// </summary>
public static void warn(string message, BorrowedReference exception, int stacklevel)
{
if (exception == null ||
(Runtime.PyObject_IsSubclass(exception, Exceptions.Warning) != 1))
{
Exceptions.RaiseTypeError("Invalid exception");
}
using var warn = Runtime.PyObject_GetAttrString(warnings_module.obj, "warn");
Exceptions.ErrorCheck(warn.Borrow());
using var argsTemp = Runtime.PyTuple_New(3);
BorrowedReference args = argsTemp.BorrowOrThrow();
using var msg = Runtime.PyString_FromString(message);
Runtime.PyTuple_SetItem(args, 0, msg.StealOrThrow());
Runtime.PyTuple_SetItem(args, 1, exception);
using var level = Runtime.PyInt_FromInt32(stacklevel);
Runtime.PyTuple_SetItem(args, 2, level.StealOrThrow());
using var result = Runtime.PyObject_CallObject(warn.Borrow(), args);
Exceptions.ErrorCheck(result.Borrow());
}
/// <remarks>
/// the lines
/// // XXX - hack to raise a compatible old-style exception ;(
/// if (Runtime.wrap_exceptions) {
/// CallOneOfTheseMethods();
///
/// </remarks>
internal static void SetupExceptionHack()
{
ns_exc = ClassManager.GetClass(typeof(Exception)).pyHandle;
cache = new Hashtable();
string code =
"import exceptions\n" +
"class Exception(exceptions.Exception):\n" +
" _class = None\n" +
" _inner = None\n" +
" \n" +
" #@property\n" +
" def message(self):\n" +
" return self.Message\n" +
" message = property(message)\n" +
" \n" +
" def __init__(self, *args, **kw):\n" +
" inst = self.__class__._class(*args, **kw)\n" +
" self.__dict__['_inner'] = inst\n" +
" exceptions.Exception.__init__(self, *args, **kw)\n" +
"\n" +
" def __getattr__(self, name, _marker=[]):\n" +
" inner = self.__dict__['_inner']\n" +
" v = getattr(inner, name, _marker)\n" +
" if v is not _marker:\n" +
" return v\n" +
" v = self.__dict__.get(name, _marker)\n" +
" if v is not _marker:\n" +
" return v\n" +
" raise AttributeError(name)\n" +
"\n" +
" def __setattr__(self, name, value):\n" +
" inner = self.__dict__['_inner']\n" +
" setattr(inner, name, value)\n" +
"\n" +
" def __str__(self):\n" +
" inner = self.__dict__.get('_inner')\n" +
" msg = getattr(inner, 'Message', '')\n" +
" st = getattr(inner, 'StackTrace', '')\n" +
" st = st and '\\n' + st or ''\n" +
" return msg + st\n" +
" \n" +
" def __repr__(self):\n" +
" inner = self.__dict__.get('_inner')\n" +
" msg = getattr(inner, 'Message', '')\n" +
" name = self.__class__.__name__\n" +
" return '%s(\\'%s\\',)' % (name, msg) \n" +
"\n";
IntPtr dict = Runtime.PyDict_New();
IntPtr builtins = Runtime.PyEval_GetBuiltins();
Runtime.PyDict_SetItemString(dict, "__builtins__", builtins);
IntPtr namestr = Runtime.PyString_FromString("System");
Runtime.PyDict_SetItemString(dict, "__name__", namestr);
Runtime.Decref(namestr);
Runtime.PyDict_SetItemString(dict, "__file__", Runtime.PyNone);
Runtime.PyDict_SetItemString(dict, "__doc__", Runtime.PyNone);
IntPtr flag = Runtime.Py_file_input;
IntPtr result = Runtime.PyRun_String(code, flag, dict, dict);
Exceptions.ErrorCheck(result);
Runtime.Decref(result);
os_exc = Runtime.PyDict_GetItemString(dict, "Exception");
Runtime.PyObject_SetAttrString(os_exc, "_class", ns_exc);
Runtime.PyErr_Clear();
}
