995 lines
24 KiB
C
995 lines
24 KiB
C
/* This module provides the suite of standard class-based exceptions for
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* Python's builtin module. This is a complete C implementation of what,
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* in Python 1.5.2, was contained in the exceptions.py module. The problem
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* there was that if exceptions.py could not be imported for some reason,
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* the entire interpreter would abort.
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*
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* By moving the exceptions into C and statically linking, we can guarantee
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* that the standard exceptions will always be available.
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*
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* history:
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* 98-08-19 fl created (for pyexe)
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* 00-02-08 fl updated for 1.5.2
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* 26-May-2000 baw vetted for Python 1.6
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*
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* written by Fredrik Lundh
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* modifications, additions, cleanups, and proofreading by Barry Warsaw
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*
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* Copyright (c) 1998-2000 by Secret Labs AB. All rights reserved.
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*/
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#include "Python.h"
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static char
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module__doc__[] =
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"Python's standard exception class hierarchy.\n\
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\n\
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Before Python 1.5, the standard exceptions were all simple string objects.\n\
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In Python 1.5, the standard exceptions were converted to classes organized\n\
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into a relatively flat hierarchy. String-based standard exceptions were\n\
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optional, or used as a fallback if some problem occurred while importing\n\
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the exception module. With Python 1.6, optional string-based standard\n\
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exceptions were removed (along with the -X command line flag).\n\
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\n\
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The class exceptions were implemented in such a way as to be almost\n\
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completely backward compatible. Some tricky uses of IOError could\n\
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potentially have broken, but by Python 1.6, all of these should have\n\
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been fixed. As of Python 1.6, the class-based standard exceptions are\n\
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now implemented in C, and are guaranteed to exist in the Python\n\
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interpreter.\n\
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\n\
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Here is a rundown of the class hierarchy. The classes found here are\n\
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inserted into both the exceptions module and the `built-in' module. It is\n\
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recommended that user defined class based exceptions be derived from the\n\
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`Exception' class, although this is currently not enforced.\n\
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\n\
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Exception\n\
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|\n\
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+-- SystemExit\n\
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+-- StandardError\n\
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|\n\
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+-- KeyboardInterrupt\n\
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+-- ImportError\n\
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+-- EnvironmentError\n\
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| |\n\
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| +-- IOError\n\
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| +-- OSError\n\
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| |\n\
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| +-- WindowsError\n\
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|\n\
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+-- EOFError\n\
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+-- RuntimeError\n\
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| |\n\
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| +-- NotImplementedError\n\
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|\n\
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+-- NameError\n\
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| |\n\
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| +-- UnboundLocalError\n\
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|\n\
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+-- AttributeError\n\
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+-- SyntaxError\n\
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+-- TypeError\n\
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+-- AssertionError\n\
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+-- LookupError\n\
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| |\n\
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| +-- IndexError\n\
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| +-- KeyError\n\
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|\n\
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+-- ArithmeticError\n\
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| |\n\
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| +-- OverflowError\n\
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| +-- ZeroDivisionError\n\
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| +-- FloatingPointError\n\
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|\n\
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+-- ValueError\n\
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| |\n\
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| +-- UnicodeError\n\
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|\n\
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+-- SystemError\n\
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+-- MemoryError";
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/* Helper function for populating a dictionary with method wrappers. */
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static int
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populate_methods(PyObject* klass, PyObject* dict, PyMethodDef* methods)
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{
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if (!methods)
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return 0;
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while (methods->ml_name) {
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/* get a wrapper for the built-in function */
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PyObject* func = PyCFunction_New(methods, NULL);
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PyObject* meth;
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int status;
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if (!func)
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return -1;
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/* turn the function into an unbound method */
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if (!(meth = PyMethod_New(func, NULL, klass))) {
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Py_DECREF(func);
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return -1;
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}
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/* add method to dictionary */
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status = PyDict_SetItemString(dict, methods->ml_name, meth);
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Py_DECREF(meth);
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Py_DECREF(func);
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/* stop now if an error occurred, otherwise do the next method */
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if (status)
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return status;
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methods++;
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}
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return 0;
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}
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/* This function is used to create all subsequent exception classes. */
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static int
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make_class(PyObject** klass, PyObject* base,
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char* name, PyMethodDef* methods,
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char* docstr)
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{
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PyObject* dict = PyDict_New();
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PyObject* str = NULL;
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int status = -1;
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if (!dict)
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return -1;
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/* If an error occurs from here on, goto finally instead of explicitly
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* returning NULL.
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*/
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if (docstr) {
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if (!(str = PyString_FromString(docstr)))
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goto finally;
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if (PyDict_SetItemString(dict, "__doc__", str))
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goto finally;
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}
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if (!(*klass = PyErr_NewException(name, base, dict)))
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goto finally;
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if (populate_methods(*klass, dict, methods)) {
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Py_DECREF(*klass);
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*klass = NULL;
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}
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status = 0;
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finally:
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Py_XDECREF(dict);
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Py_XDECREF(str);
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return status;
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}
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/* Use this for *args signatures, otherwise just use PyArg_ParseTuple() */
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static PyObject* get_self(PyObject* args)
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{
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PyObject* self = PyTuple_GetItem(args, 0);
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if (!self) {
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/* Watch out for being called to early in the bootstapping process */
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if (PyExc_TypeError) {
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PyErr_SetString(PyExc_TypeError,
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"unbound method must be called with class instance 1st argument");
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}
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return NULL;
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}
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return self;
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}
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/* Notes on bootstrapping the exception classes.
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*
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* First thing we create is the base class for all exceptions, called
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* appropriately enough: Exception. Creation of this class makes no
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* assumptions about the existance of any other exception class -- except
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* for TypeError, which can conditionally exist.
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*
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* Next, StandardError is created (which is quite simple) followed by
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* TypeError, because the instantiation of other exceptions can potentially
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* throw a TypeError. Once these exceptions are created, all the others
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* can be created in any order. See the static exctable below for the
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* explicit bootstrap order.
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*
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* All classes after Exception can be created using PyErr_NewException().
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*/
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static char
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Exception__doc__[] = "Common base class for all exceptions.";
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static PyObject*
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Exception__init__(PyObject* self, PyObject* args)
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{
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int status;
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if (!(self = get_self(args)))
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return NULL;
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/* set args attribute */
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args = PySequence_GetSlice(args, 1, PySequence_Length(args));
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if (!args)
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return NULL;
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status = PyObject_SetAttrString(self, "args", args);
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Py_DECREF(args);
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if (status < 0)
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return NULL;
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Py_INCREF(Py_None);
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return Py_None;
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}
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static PyObject*
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Exception__str__(PyObject* self, PyObject* args)
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{
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PyObject* out;
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PyObject* tmp;
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if (!PyArg_ParseTuple(args, "O", &self))
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return NULL;
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args = PyObject_GetAttrString(self, "args");
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if (!args)
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return NULL;
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switch (PySequence_Length(args)) {
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case 0:
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out = PyString_FromString("");
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break;
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case 1:
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if (!(tmp = PySequence_GetItem(args, 0)))
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out = NULL;
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else
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out = PyObject_Str(tmp);
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break;
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default:
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out = PyObject_Str(args);
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break;
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}
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Py_DECREF(args);
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return out;
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}
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static PyObject*
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Exception__getitem__(PyObject* self, PyObject* args)
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{
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PyObject* out;
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PyObject* index;
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if (!PyArg_ParseTuple(args, "OO", &self, &index))
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return NULL;
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args = PyObject_GetAttrString(self, "args");
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if (!args)
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return NULL;
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out = PyObject_GetItem(args, index);
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Py_DECREF(args);
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return out;
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}
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static PyMethodDef
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Exception_methods[] = {
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/* methods for the Exception class */
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{ "__getitem__", Exception__getitem__, 1},
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{ "__str__", Exception__str__, 1},
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{ "__init__", Exception__init__, 1},
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{ NULL, NULL }
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};
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static int
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make_Exception(char* modulename)
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{
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PyObject* dict = PyDict_New();
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PyObject* str = NULL;
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PyObject* name = NULL;
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int status = -1;
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if (!dict)
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return -1;
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/* If an error occurs from here on, goto finally instead of explicitly
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* returning NULL.
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*/
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if (!(str = PyString_FromString(modulename)))
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goto finally;
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if (PyDict_SetItemString(dict, "__module__", str))
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goto finally;
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Py_DECREF(str);
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if (!(str = PyString_FromString(Exception__doc__)))
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goto finally;
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if (PyDict_SetItemString(dict, "__doc__", str))
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goto finally;
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if (!(name = PyString_FromString("Exception")))
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goto finally;
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if (!(PyExc_Exception = PyClass_New(NULL, dict, name)))
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goto finally;
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/* Now populate the dictionary with the method suite */
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if (populate_methods(PyExc_Exception, dict, Exception_methods))
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/* Don't need to reclaim PyExc_Exception here because that'll
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* happen during interpreter shutdown.
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*/
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goto finally;
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status = 0;
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finally:
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Py_XDECREF(dict);
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Py_XDECREF(str);
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Py_XDECREF(name);
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return status;
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}
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static char
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StandardError__doc__[] = "Base class for all standard Python exceptions.";
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static char
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TypeError__doc__[] = "Inappropriate argument type.";
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static char
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SystemExit__doc__[] = "Request to exit from the interpreter.";
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static PyObject*
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SystemExit__init__(PyObject* self, PyObject* args)
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{
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PyObject* code;
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int status;
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if (!(self = get_self(args)))
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return NULL;
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/* Set args attribute. */
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if (!(args = PySequence_GetSlice(args, 1, PySequence_Length(args))))
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return NULL;
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status = PyObject_SetAttrString(self, "args", args);
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if (status < 0) {
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Py_DECREF(args);
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return NULL;
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}
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/* set code attribute */
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switch (PySequence_Length(args)) {
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case 0:
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Py_INCREF(Py_None);
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code = Py_None;
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break;
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case 1:
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code = PySequence_GetItem(args, 0);
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break;
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default:
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Py_INCREF(args);
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code = args;
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break;
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}
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status = PyObject_SetAttrString(self, "code", code);
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Py_DECREF(code);
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Py_DECREF(args);
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if (status < 0)
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return NULL;
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Py_INCREF(Py_None);
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return Py_None;
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}
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|
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|
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PyMethodDef SystemExit_methods[] = {
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{ "__init__", SystemExit__init__, 1},
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{NULL, NULL}
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};
|
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|
||
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||
|
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static char
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KeyboardInterrupt__doc__[] = "Program interrupted by user.";
|
||
|
||
static char
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ImportError__doc__[] =
|
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"Import can't find module, or can't find name in module.";
|
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|
||
|
||
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static char
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EnvironmentError__doc__[] = "Base class for I/O related errors.";
|
||
|
||
|
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static PyObject*
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EnvironmentError__init__(PyObject* self, PyObject* args)
|
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{
|
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PyObject* item0 = NULL;
|
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PyObject* item1 = NULL;
|
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PyObject* item2 = NULL;
|
||
PyObject* subslice = NULL;
|
||
PyObject* rtnval = NULL;
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||
|
||
if (!(self = get_self(args)))
|
||
return NULL;
|
||
|
||
if (!(args = PySequence_GetSlice(args, 1, PySequence_Length(args))))
|
||
return NULL;
|
||
|
||
if (PyObject_SetAttrString(self, "args", args) ||
|
||
PyObject_SetAttrString(self, "errno", Py_None) ||
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PyObject_SetAttrString(self, "strerror", Py_None) ||
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PyObject_SetAttrString(self, "filename", Py_None))
|
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{
|
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goto finally;
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||
}
|
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|
||
switch (PySequence_Length(args)) {
|
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case 3:
|
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/* open() errors give third argument which is the filename. But so
|
||
* common in-place unpacking doesn't break, e.g.:
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*
|
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* except IOError, (errno, strerror):
|
||
*
|
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* we hack args so that it only contains two items. This also
|
||
* means we need our own __str__() which prints out the filename
|
||
* when it was supplied.
|
||
*/
|
||
item0 = PySequence_GetItem(args, 0);
|
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item1 = PySequence_GetItem(args, 1);
|
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item2 = PySequence_GetItem(args, 2);
|
||
if (!item0 || !item1 || !item2)
|
||
goto finally;
|
||
|
||
if (PyObject_SetAttrString(self, "errno", item0) ||
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PyObject_SetAttrString(self, "strerror", item1) ||
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||
PyObject_SetAttrString(self, "filename", item2))
|
||
{
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||
goto finally;
|
||
}
|
||
|
||
subslice = PySequence_GetSlice(args, 0, 2);
|
||
if (!subslice || PyObject_SetAttrString(self, "args", subslice))
|
||
goto finally;
|
||
|
||
case 2:
|
||
/* common case: PyErr_SetFromErrno() */
|
||
item0 = PySequence_GetItem(args, 0);
|
||
item1 = PySequence_GetItem(args, 1);
|
||
if (!item0 || !item1)
|
||
goto finally;
|
||
|
||
if (PyObject_SetAttrString(self, "errno", item0) ||
|
||
PyObject_SetAttrString(self, "strerror", item1))
|
||
{
|
||
goto finally;
|
||
}
|
||
}
|
||
|
||
Py_INCREF(Py_None);
|
||
rtnval = Py_None;
|
||
|
||
finally:
|
||
Py_DECREF(args);
|
||
Py_XDECREF(item0);
|
||
Py_XDECREF(item1);
|
||
Py_XDECREF(item2);
|
||
Py_XDECREF(subslice);
|
||
return rtnval;
|
||
}
|
||
|
||
|
||
static PyObject*
|
||
EnvironmentError__str__(PyObject* self, PyObject* args)
|
||
{
|
||
PyObject* originalself = self;
|
||
PyObject* filename;
|
||
PyObject* serrno;
|
||
PyObject* strerror;
|
||
PyObject* rtnval = NULL;
|
||
|
||
if (!PyArg_ParseTuple(args, "O", &self))
|
||
return NULL;
|
||
|
||
filename = PyObject_GetAttrString(self, "filename");
|
||
serrno = PyObject_GetAttrString(self, "errno");
|
||
strerror = PyObject_GetAttrString(self, "strerror");
|
||
if (!filename || !serrno || !strerror)
|
||
goto finally;
|
||
|
||
if (filename != Py_None) {
|
||
PyObject* fmt = PyString_FromString("[Errno %s] %s: %s");
|
||
PyObject* repr = PyObject_Repr(filename);
|
||
PyObject* tuple = PyTuple_New(3);
|
||
|
||
if (!fmt || !repr || !tuple) {
|
||
Py_XDECREF(fmt);
|
||
Py_XDECREF(repr);
|
||
Py_XDECREF(tuple);
|
||
goto finally;
|
||
}
|
||
|
||
PyTuple_SET_ITEM(tuple, 0, serrno);
|
||
PyTuple_SET_ITEM(tuple, 1, strerror);
|
||
PyTuple_SET_ITEM(tuple, 2, repr);
|
||
|
||
rtnval = PyString_Format(fmt, tuple);
|
||
|
||
Py_DECREF(fmt);
|
||
Py_DECREF(tuple);
|
||
/* already freed because tuple owned only reference */
|
||
serrno = NULL;
|
||
strerror = NULL;
|
||
}
|
||
else if (PyObject_IsTrue(serrno) && PyObject_IsTrue(strerror)) {
|
||
PyObject* fmt = PyString_FromString("[Errno %s] %s");
|
||
PyObject* tuple = PyTuple_New(2);
|
||
|
||
if (!fmt || !tuple) {
|
||
Py_XDECREF(fmt);
|
||
Py_XDECREF(tuple);
|
||
goto finally;
|
||
}
|
||
|
||
PyTuple_SET_ITEM(tuple, 0, serrno);
|
||
PyTuple_SET_ITEM(tuple, 1, strerror);
|
||
|
||
rtnval = PyString_Format(fmt, tuple);
|
||
|
||
Py_DECREF(fmt);
|
||
Py_DECREF(tuple);
|
||
/* already freed because tuple owned only reference */
|
||
serrno = NULL;
|
||
strerror = NULL;
|
||
}
|
||
else
|
||
/* The original Python code said:
|
||
*
|
||
* return StandardError.__str__(self)
|
||
*
|
||
* but there is no StandardError__str__() function; we happen to
|
||
* know that's just a pass through to Exception__str__().
|
||
*/
|
||
rtnval = Exception__str__(originalself, args);
|
||
|
||
finally:
|
||
Py_XDECREF(filename);
|
||
Py_XDECREF(serrno);
|
||
Py_XDECREF(strerror);
|
||
return rtnval;
|
||
}
|
||
|
||
|
||
static
|
||
PyMethodDef EnvironmentError_methods[] = {
|
||
{"__init__", EnvironmentError__init__, 1},
|
||
{"__str__", EnvironmentError__str__, 1},
|
||
{NULL, NULL}
|
||
};
|
||
|
||
|
||
|
||
|
||
static char
|
||
IOError__doc__[] = "I/O operation failed.";
|
||
|
||
static char
|
||
OSError__doc__[] = "OS system call failed.";
|
||
|
||
#ifdef MS_WINDOWS
|
||
static char
|
||
WindowsError__doc__[] = "MS-Windows OS system call failed.";
|
||
#endif /* MS_WINDOWS */
|
||
|
||
static char
|
||
EOFError__doc__[] = "Read beyond end of file.";
|
||
|
||
static char
|
||
RuntimeError__doc__[] = "Unspecified run-time error.";
|
||
|
||
static char
|
||
NotImplementedError__doc__[] =
|
||
"Method or function hasn't been implemented yet.";
|
||
|
||
static char
|
||
NameError__doc__[] = "Name not found globally.";
|
||
|
||
static char
|
||
UnboundLocalError__doc__[] =
|
||
"Local name referenced but not bound to a value.";
|
||
|
||
static char
|
||
AttributeError__doc__[] = "Attribute not found.";
|
||
|
||
|
||
|
||
static char
|
||
SyntaxError__doc__[] = "Invalid syntax.";
|
||
|
||
|
||
static int
|
||
SyntaxError__classinit__(PyObject* klass)
|
||
{
|
||
PyObject* emptystring = PyString_FromString("");
|
||
|
||
/* Additional class-creation time initializations */
|
||
if (!emptystring ||
|
||
PyObject_SetAttrString(klass, "msg", emptystring) ||
|
||
PyObject_SetAttrString(klass, "filename", Py_None) ||
|
||
PyObject_SetAttrString(klass, "lineno", Py_None) ||
|
||
PyObject_SetAttrString(klass, "offset", Py_None) ||
|
||
PyObject_SetAttrString(klass, "text", Py_None))
|
||
{
|
||
Py_XDECREF(emptystring);
|
||
return -1;
|
||
}
|
||
Py_DECREF(emptystring);
|
||
return 0;
|
||
}
|
||
|
||
|
||
static PyObject*
|
||
SyntaxError__init__(PyObject* self, PyObject* args)
|
||
{
|
||
PyObject* rtnval = NULL;
|
||
int lenargs;
|
||
|
||
if (!(self = get_self(args)))
|
||
return NULL;
|
||
|
||
if (!(args = PySequence_GetSlice(args, 1, PySequence_Length(args))))
|
||
return NULL;
|
||
|
||
if (PyObject_SetAttrString(self, "args", args))
|
||
goto finally;
|
||
|
||
lenargs = PySequence_Length(args);
|
||
if (lenargs >= 1) {
|
||
PyObject* item0 = PySequence_GetItem(args, 0);
|
||
int status;
|
||
|
||
if (!item0)
|
||
goto finally;
|
||
status = PyObject_SetAttrString(self, "msg", item0);
|
||
Py_DECREF(item0);
|
||
if (status)
|
||
goto finally;
|
||
}
|
||
if (lenargs == 2) {
|
||
PyObject* info = PySequence_GetItem(args, 1);
|
||
PyObject *filename, *lineno, *offset, *text;
|
||
int status = 1;
|
||
|
||
if (!info)
|
||
goto finally;
|
||
|
||
filename = PySequence_GetItem(info, 0);
|
||
lineno = PySequence_GetItem(info, 1);
|
||
offset = PySequence_GetItem(info, 2);
|
||
text = PySequence_GetItem(info, 3);
|
||
|
||
Py_DECREF(info);
|
||
|
||
if (filename && lineno && offset && text) {
|
||
status = PyObject_SetAttrString(self, "filename", filename) ||
|
||
PyObject_SetAttrString(self, "lineno", lineno) ||
|
||
PyObject_SetAttrString(self, "offset", offset) ||
|
||
PyObject_SetAttrString(self, "text", text);
|
||
}
|
||
Py_XDECREF(filename);
|
||
Py_XDECREF(lineno);
|
||
Py_XDECREF(offset);
|
||
Py_XDECREF(text);
|
||
|
||
if (status)
|
||
goto finally;
|
||
}
|
||
Py_INCREF(Py_None);
|
||
rtnval = Py_None;
|
||
|
||
finally:
|
||
Py_DECREF(args);
|
||
return rtnval;
|
||
}
|
||
|
||
|
||
static PyObject*
|
||
SyntaxError__str__(PyObject* self, PyObject* args)
|
||
{
|
||
PyObject* msg;
|
||
PyObject* str;
|
||
|
||
if (!PyArg_ParseTuple(args, "O", &self))
|
||
return NULL;
|
||
|
||
if (!(msg = PyObject_GetAttrString(self, "msg")))
|
||
return NULL;
|
||
|
||
str = PyObject_Str(msg);
|
||
Py_DECREF(msg);
|
||
return str;
|
||
}
|
||
|
||
|
||
PyMethodDef SyntaxError_methods[] = {
|
||
{"__init__", SyntaxError__init__, 1},
|
||
{"__str__", SyntaxError__str__, 1},
|
||
{NULL, NULL}
|
||
};
|
||
|
||
|
||
|
||
static char
|
||
AssertionError__doc__[] = "Assertion failed.";
|
||
|
||
static char
|
||
LookupError__doc__[] = "Base class for lookup errors.";
|
||
|
||
static char
|
||
IndexError__doc__[] = "Sequence index out of range.";
|
||
|
||
static char
|
||
KeyError__doc__[] = "Mapping key not found.";
|
||
|
||
static char
|
||
ArithmeticError__doc__[] = "Base class for arithmetic errors.";
|
||
|
||
static char
|
||
OverflowError__doc__[] = "Result too large to be represented.";
|
||
|
||
static char
|
||
ZeroDivisionError__doc__[] =
|
||
"Second argument to a division or modulo operation was zero.";
|
||
|
||
static char
|
||
FloatingPointError__doc__[] = "Floating point operation failed.";
|
||
|
||
static char
|
||
ValueError__doc__[] = "Inappropriate argument value (of correct type).";
|
||
|
||
static char
|
||
UnicodeError__doc__[] = "Unicode related error.";
|
||
|
||
static char
|
||
SystemError__doc__[] = "Internal error in the Python interpreter.\n\
|
||
\n\
|
||
Please report this to the Python maintainer, along with the traceback,\n\
|
||
the Python version, and the hardware/OS platform and version.";
|
||
|
||
static char
|
||
MemoryError__doc__[] = "Out of memory.";
|
||
|
||
|
||
|
||
/* module global functions */
|
||
static PyMethodDef functions[] = {
|
||
/* Sentinel */
|
||
{NULL, NULL}
|
||
};
|
||
|
||
|
||
|
||
/* Global C API defined exceptions */
|
||
|
||
PyObject *PyExc_Exception;
|
||
PyObject *PyExc_StandardError;
|
||
PyObject *PyExc_ArithmeticError;
|
||
PyObject *PyExc_LookupError;
|
||
|
||
PyObject *PyExc_AssertionError;
|
||
PyObject *PyExc_AttributeError;
|
||
PyObject *PyExc_EOFError;
|
||
PyObject *PyExc_FloatingPointError;
|
||
PyObject *PyExc_EnvironmentError;
|
||
PyObject *PyExc_IOError;
|
||
PyObject *PyExc_OSError;
|
||
PyObject *PyExc_ImportError;
|
||
PyObject *PyExc_IndexError;
|
||
PyObject *PyExc_KeyError;
|
||
PyObject *PyExc_KeyboardInterrupt;
|
||
PyObject *PyExc_MemoryError;
|
||
PyObject *PyExc_NameError;
|
||
PyObject *PyExc_OverflowError;
|
||
PyObject *PyExc_RuntimeError;
|
||
PyObject *PyExc_NotImplementedError;
|
||
PyObject *PyExc_SyntaxError;
|
||
PyObject *PyExc_SystemError;
|
||
PyObject *PyExc_SystemExit;
|
||
PyObject *PyExc_UnboundLocalError;
|
||
PyObject *PyExc_UnicodeError;
|
||
PyObject *PyExc_TypeError;
|
||
PyObject *PyExc_ValueError;
|
||
PyObject *PyExc_ZeroDivisionError;
|
||
#ifdef MS_WINDOWS
|
||
PyObject *PyExc_WindowsError;
|
||
#endif
|
||
|
||
/* Pre-computed MemoryError instance. Best to create this as early as
|
||
* possibly and not wait until a MemoryError is actually raised!
|
||
*/
|
||
PyObject *PyExc_MemoryErrorInst;
|
||
|
||
|
||
|
||
/* mapping between exception names and their PyObject** */
|
||
static struct
|
||
{
|
||
char* name;
|
||
PyObject** exc;
|
||
PyObject** base; /* NULL == PyExc_StandardError */
|
||
char* docstr;
|
||
PyMethodDef* methods;
|
||
int (*classinit)(PyObject*);
|
||
}
|
||
exctable[] = {
|
||
/*
|
||
* The first three classes MUST appear in exactly this order
|
||
*/
|
||
{"Exception", &PyExc_Exception},
|
||
{"StandardError", &PyExc_StandardError, &PyExc_Exception,
|
||
StandardError__doc__},
|
||
{"TypeError", &PyExc_TypeError, 0, TypeError__doc__},
|
||
/*
|
||
* The rest appear in depth-first order of the hierarchy
|
||
*/
|
||
{"SystemExit", &PyExc_SystemExit, &PyExc_Exception, SystemExit__doc__,
|
||
SystemExit_methods},
|
||
{"KeyboardInterrupt", &PyExc_KeyboardInterrupt, 0, KeyboardInterrupt__doc__},
|
||
{"ImportError", &PyExc_ImportError, 0, ImportError__doc__},
|
||
{"EnvironmentError", &PyExc_EnvironmentError, 0, EnvironmentError__doc__,
|
||
EnvironmentError_methods},
|
||
{"IOError", &PyExc_IOError, &PyExc_EnvironmentError, IOError__doc__},
|
||
{"OSError", &PyExc_OSError, &PyExc_EnvironmentError, OSError__doc__},
|
||
#ifdef MS_WINDOWS
|
||
{"WindowsError", &PyExc_WindowsError, &PyExc_EnvironmentError,
|
||
WindowsError__doc__},
|
||
#endif /* MS_WINDOWS */
|
||
{"EOFError", &PyExc_EOFError, 0, EOFError__doc__},
|
||
{"RuntimeError", &PyExc_RuntimeError, 0, RuntimeError__doc__},
|
||
{"NotImplementedError", &PyExc_NotImplementedError,
|
||
&PyExc_RuntimeError, NotImplementedError__doc__},
|
||
{"NameError", &PyExc_NameError, 0, NameError__doc__},
|
||
{"UnboundLocalError", &PyExc_UnboundLocalError, &PyExc_NameError,
|
||
UnboundLocalError__doc__},
|
||
{"AttributeError", &PyExc_AttributeError, 0, AttributeError__doc__},
|
||
{"SyntaxError", &PyExc_SyntaxError, 0, SyntaxError__doc__,
|
||
SyntaxError_methods, SyntaxError__classinit__},
|
||
{"AssertionError", &PyExc_AssertionError, 0, AssertionError__doc__},
|
||
{"LookupError", &PyExc_LookupError, 0, LookupError__doc__},
|
||
{"IndexError", &PyExc_IndexError, &PyExc_LookupError,
|
||
IndexError__doc__},
|
||
{"KeyError", &PyExc_KeyError, &PyExc_LookupError,
|
||
KeyError__doc__},
|
||
{"ArithmeticError", &PyExc_ArithmeticError, 0, ArithmeticError__doc__},
|
||
{"OverflowError", &PyExc_OverflowError, &PyExc_ArithmeticError,
|
||
OverflowError__doc__},
|
||
{"ZeroDivisionError", &PyExc_ZeroDivisionError, &PyExc_ArithmeticError,
|
||
ZeroDivisionError__doc__},
|
||
{"FloatingPointError", &PyExc_FloatingPointError, &PyExc_ArithmeticError,
|
||
FloatingPointError__doc__},
|
||
{"ValueError", &PyExc_ValueError, 0, ValueError__doc__},
|
||
{"UnicodeError", &PyExc_UnicodeError, &PyExc_ValueError, UnicodeError__doc__},
|
||
{"SystemError", &PyExc_SystemError, 0, SystemError__doc__},
|
||
{"MemoryError", &PyExc_MemoryError, 0, MemoryError__doc__},
|
||
/* Sentinel */
|
||
{NULL}
|
||
};
|
||
|
||
|
||
|
||
void
|
||
#ifdef WIN32
|
||
__declspec(dllexport)
|
||
#endif /* WIN32 */
|
||
init_exceptions()
|
||
{
|
||
char* modulename = "exceptions";
|
||
int modnamesz = strlen(modulename);
|
||
int i;
|
||
|
||
PyObject* me = Py_InitModule(modulename, functions);
|
||
PyObject* mydict = PyModule_GetDict(me);
|
||
PyObject* bltinmod = PyImport_ImportModule("__builtin__");
|
||
PyObject* bdict = PyModule_GetDict(bltinmod);
|
||
PyObject* doc = PyString_FromString(module__doc__);
|
||
PyObject* args;
|
||
|
||
PyDict_SetItemString(mydict, "__doc__", doc);
|
||
if (PyErr_Occurred())
|
||
Py_FatalError("exceptions bootstrapping error.");
|
||
|
||
/* This is the base class of all exceptions, so make it first. */
|
||
if (make_Exception(modulename) ||
|
||
PyDict_SetItemString(mydict, "Exception", PyExc_Exception) ||
|
||
PyDict_SetItemString(bdict, "Exception", PyExc_Exception))
|
||
{
|
||
Py_FatalError("Base class `Exception' could not be created.");
|
||
}
|
||
|
||
/* Now we can programmatically create all the remaining exceptions.
|
||
* Remember to start the loop at 1 to skip Exceptions.
|
||
*/
|
||
for (i=1; exctable[i].name; i++) {
|
||
int status;
|
||
char* cname = PyMem_NEW(char, modnamesz+strlen(exctable[i].name)+2);
|
||
PyObject* base;
|
||
|
||
(void)strcpy(cname, modulename);
|
||
(void)strcat(cname, ".");
|
||
(void)strcat(cname, exctable[i].name);
|
||
|
||
if (exctable[i].base == 0)
|
||
base = PyExc_StandardError;
|
||
else
|
||
base = *exctable[i].base;
|
||
|
||
status = make_class(exctable[i].exc, base, cname,
|
||
exctable[i].methods,
|
||
exctable[i].docstr);
|
||
|
||
PyMem_DEL(cname);
|
||
|
||
if (status)
|
||
Py_FatalError("Standard exception classes could not be created.");
|
||
|
||
if (exctable[i].classinit) {
|
||
status = (*exctable[i].classinit)(*exctable[i].exc);
|
||
if (status)
|
||
Py_FatalError("An exception class could not be initialized.");
|
||
}
|
||
|
||
/* Now insert the class into both this module and the __builtin__
|
||
* module.
|
||
*/
|
||
if (PyDict_SetItemString(mydict, exctable[i].name, *exctable[i].exc) ||
|
||
PyDict_SetItemString(bdict, exctable[i].name, *exctable[i].exc))
|
||
{
|
||
Py_FatalError("Module dictionary insertion problem.");
|
||
}
|
||
}
|
||
|
||
/* Now we need to pre-allocate a MemoryError instance */
|
||
args = Py_BuildValue("()");
|
||
if (!args ||
|
||
!(PyExc_MemoryErrorInst = PyEval_CallObject(PyExc_MemoryError, args)))
|
||
{
|
||
Py_FatalError("Cannot pre-allocate MemoryError instance\n");
|
||
}
|
||
Py_DECREF(args);
|
||
|
||
/* We're done with __builtin__ */
|
||
Py_DECREF(bltinmod);
|
||
}
|
||
|
||
|
||
void
|
||
#ifdef WIN32
|
||
__declspec(dllexport)
|
||
#endif /* WIN32 */
|
||
fini_exceptions()
|
||
{
|
||
int i;
|
||
|
||
Py_XDECREF(PyExc_MemoryErrorInst);
|
||
PyExc_MemoryErrorInst = NULL;
|
||
|
||
for (i=0; exctable[i].name; i++) {
|
||
Py_XDECREF(*exctable[i].exc);
|
||
*exctable[i].exc = NULL;
|
||
}
|
||
}
|