1 | /* |
2 | * New exceptions.c written in Iceland by Richard Jones and Georg Brandl. |
3 | * |
4 | * Thanks go to Tim Peters and Michael Hudson for debugging. |
5 | */ |
6 | |
7 | #define PY_SSIZE_T_CLEAN |
8 | #include <Python.h> |
9 | #include "pycore_initconfig.h" |
10 | #include "pycore_object.h" |
11 | #include "structmember.h" // PyMemberDef |
12 | #include "osdefs.h" // SEP |
13 | |
14 | |
15 | /* Compatibility aliases */ |
16 | PyObject *PyExc_EnvironmentError = NULL; |
17 | PyObject *PyExc_IOError = NULL; |
18 | #ifdef MS_WINDOWS |
19 | PyObject *PyExc_WindowsError = NULL; |
20 | #endif |
21 | |
22 | |
23 | static struct _Py_exc_state* |
24 | get_exc_state(void) |
25 | { |
26 | PyInterpreterState *interp = _PyInterpreterState_GET(); |
27 | return &interp->exc_state; |
28 | } |
29 | |
30 | |
31 | /* NOTE: If the exception class hierarchy changes, don't forget to update |
32 | * Lib/test/exception_hierarchy.txt |
33 | */ |
34 | |
35 | /* |
36 | * BaseException |
37 | */ |
38 | static PyObject * |
39 | BaseException_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
40 | { |
41 | PyBaseExceptionObject *self; |
42 | |
43 | self = (PyBaseExceptionObject *)type->tp_alloc(type, 0); |
44 | if (!self) |
45 | return NULL; |
46 | /* the dict is created on the fly in PyObject_GenericSetAttr */ |
47 | self->dict = NULL; |
48 | self->traceback = self->cause = self->context = NULL; |
49 | self->suppress_context = 0; |
50 | |
51 | if (args) { |
52 | self->args = args; |
53 | Py_INCREF(args); |
54 | return (PyObject *)self; |
55 | } |
56 | |
57 | self->args = PyTuple_New(0); |
58 | if (!self->args) { |
59 | Py_DECREF(self); |
60 | return NULL; |
61 | } |
62 | |
63 | return (PyObject *)self; |
64 | } |
65 | |
66 | static int |
67 | BaseException_init(PyBaseExceptionObject *self, PyObject *args, PyObject *kwds) |
68 | { |
69 | if (!_PyArg_NoKeywords(Py_TYPE(self)->tp_name, kwds)) |
70 | return -1; |
71 | |
72 | Py_INCREF(args); |
73 | Py_XSETREF(self->args, args); |
74 | |
75 | return 0; |
76 | } |
77 | |
78 | static int |
79 | BaseException_clear(PyBaseExceptionObject *self) |
80 | { |
81 | Py_CLEAR(self->dict); |
82 | Py_CLEAR(self->args); |
83 | Py_CLEAR(self->traceback); |
84 | Py_CLEAR(self->cause); |
85 | Py_CLEAR(self->context); |
86 | return 0; |
87 | } |
88 | |
89 | static void |
90 | BaseException_dealloc(PyBaseExceptionObject *self) |
91 | { |
92 | _PyObject_GC_UNTRACK(self); |
93 | BaseException_clear(self); |
94 | Py_TYPE(self)->tp_free((PyObject *)self); |
95 | } |
96 | |
97 | static int |
98 | BaseException_traverse(PyBaseExceptionObject *self, visitproc visit, void *arg) |
99 | { |
100 | Py_VISIT(self->dict); |
101 | Py_VISIT(self->args); |
102 | Py_VISIT(self->traceback); |
103 | Py_VISIT(self->cause); |
104 | Py_VISIT(self->context); |
105 | return 0; |
106 | } |
107 | |
108 | static PyObject * |
109 | BaseException_str(PyBaseExceptionObject *self) |
110 | { |
111 | switch (PyTuple_GET_SIZE(self->args)) { |
112 | case 0: |
113 | return PyUnicode_FromString("" ); |
114 | case 1: |
115 | return PyObject_Str(PyTuple_GET_ITEM(self->args, 0)); |
116 | default: |
117 | return PyObject_Str(self->args); |
118 | } |
119 | } |
120 | |
121 | static PyObject * |
122 | BaseException_repr(PyBaseExceptionObject *self) |
123 | { |
124 | const char *name = _PyType_Name(Py_TYPE(self)); |
125 | if (PyTuple_GET_SIZE(self->args) == 1) |
126 | return PyUnicode_FromFormat("%s(%R)" , name, |
127 | PyTuple_GET_ITEM(self->args, 0)); |
128 | else |
129 | return PyUnicode_FromFormat("%s%R" , name, self->args); |
130 | } |
131 | |
132 | /* Pickling support */ |
133 | static PyObject * |
134 | BaseException_reduce(PyBaseExceptionObject *self, PyObject *Py_UNUSED(ignored)) |
135 | { |
136 | if (self->args && self->dict) |
137 | return PyTuple_Pack(3, Py_TYPE(self), self->args, self->dict); |
138 | else |
139 | return PyTuple_Pack(2, Py_TYPE(self), self->args); |
140 | } |
141 | |
142 | /* |
143 | * Needed for backward compatibility, since exceptions used to store |
144 | * all their attributes in the __dict__. Code is taken from cPickle's |
145 | * load_build function. |
146 | */ |
147 | static PyObject * |
148 | BaseException_setstate(PyObject *self, PyObject *state) |
149 | { |
150 | PyObject *d_key, *d_value; |
151 | Py_ssize_t i = 0; |
152 | |
153 | if (state != Py_None) { |
154 | if (!PyDict_Check(state)) { |
155 | PyErr_SetString(PyExc_TypeError, "state is not a dictionary" ); |
156 | return NULL; |
157 | } |
158 | while (PyDict_Next(state, &i, &d_key, &d_value)) { |
159 | if (PyObject_SetAttr(self, d_key, d_value) < 0) |
160 | return NULL; |
161 | } |
162 | } |
163 | Py_RETURN_NONE; |
164 | } |
165 | |
166 | static PyObject * |
167 | BaseException_with_traceback(PyObject *self, PyObject *tb) { |
168 | if (PyException_SetTraceback(self, tb)) |
169 | return NULL; |
170 | |
171 | Py_INCREF(self); |
172 | return self; |
173 | } |
174 | |
175 | PyDoc_STRVAR(with_traceback_doc, |
176 | "Exception.with_traceback(tb) --\n\ |
177 | set self.__traceback__ to tb and return self." ); |
178 | |
179 | |
180 | static PyMethodDef BaseException_methods[] = { |
181 | {"__reduce__" , (PyCFunction)BaseException_reduce, METH_NOARGS }, |
182 | {"__setstate__" , (PyCFunction)BaseException_setstate, METH_O }, |
183 | {"with_traceback" , (PyCFunction)BaseException_with_traceback, METH_O, |
184 | with_traceback_doc}, |
185 | {NULL, NULL, 0, NULL}, |
186 | }; |
187 | |
188 | static PyObject * |
189 | BaseException_get_args(PyBaseExceptionObject *self, void *Py_UNUSED(ignored)) |
190 | { |
191 | if (self->args == NULL) { |
192 | Py_RETURN_NONE; |
193 | } |
194 | Py_INCREF(self->args); |
195 | return self->args; |
196 | } |
197 | |
198 | static int |
199 | BaseException_set_args(PyBaseExceptionObject *self, PyObject *val, void *Py_UNUSED(ignored)) |
200 | { |
201 | PyObject *seq; |
202 | if (val == NULL) { |
203 | PyErr_SetString(PyExc_TypeError, "args may not be deleted" ); |
204 | return -1; |
205 | } |
206 | seq = PySequence_Tuple(val); |
207 | if (!seq) |
208 | return -1; |
209 | Py_XSETREF(self->args, seq); |
210 | return 0; |
211 | } |
212 | |
213 | static PyObject * |
214 | BaseException_get_tb(PyBaseExceptionObject *self, void *Py_UNUSED(ignored)) |
215 | { |
216 | if (self->traceback == NULL) { |
217 | Py_RETURN_NONE; |
218 | } |
219 | Py_INCREF(self->traceback); |
220 | return self->traceback; |
221 | } |
222 | |
223 | static int |
224 | BaseException_set_tb(PyBaseExceptionObject *self, PyObject *tb, void *Py_UNUSED(ignored)) |
225 | { |
226 | if (tb == NULL) { |
227 | PyErr_SetString(PyExc_TypeError, "__traceback__ may not be deleted" ); |
228 | return -1; |
229 | } |
230 | else if (!(tb == Py_None || PyTraceBack_Check(tb))) { |
231 | PyErr_SetString(PyExc_TypeError, |
232 | "__traceback__ must be a traceback or None" ); |
233 | return -1; |
234 | } |
235 | |
236 | Py_INCREF(tb); |
237 | Py_XSETREF(self->traceback, tb); |
238 | return 0; |
239 | } |
240 | |
241 | static PyObject * |
242 | BaseException_get_context(PyObject *self, void *Py_UNUSED(ignored)) |
243 | { |
244 | PyObject *res = PyException_GetContext(self); |
245 | if (res) |
246 | return res; /* new reference already returned above */ |
247 | Py_RETURN_NONE; |
248 | } |
249 | |
250 | static int |
251 | BaseException_set_context(PyObject *self, PyObject *arg, void *Py_UNUSED(ignored)) |
252 | { |
253 | if (arg == NULL) { |
254 | PyErr_SetString(PyExc_TypeError, "__context__ may not be deleted" ); |
255 | return -1; |
256 | } else if (arg == Py_None) { |
257 | arg = NULL; |
258 | } else if (!PyExceptionInstance_Check(arg)) { |
259 | PyErr_SetString(PyExc_TypeError, "exception context must be None " |
260 | "or derive from BaseException" ); |
261 | return -1; |
262 | } else { |
263 | /* PyException_SetContext steals this reference */ |
264 | Py_INCREF(arg); |
265 | } |
266 | PyException_SetContext(self, arg); |
267 | return 0; |
268 | } |
269 | |
270 | static PyObject * |
271 | BaseException_get_cause(PyObject *self, void *Py_UNUSED(ignored)) |
272 | { |
273 | PyObject *res = PyException_GetCause(self); |
274 | if (res) |
275 | return res; /* new reference already returned above */ |
276 | Py_RETURN_NONE; |
277 | } |
278 | |
279 | static int |
280 | BaseException_set_cause(PyObject *self, PyObject *arg, void *Py_UNUSED(ignored)) |
281 | { |
282 | if (arg == NULL) { |
283 | PyErr_SetString(PyExc_TypeError, "__cause__ may not be deleted" ); |
284 | return -1; |
285 | } else if (arg == Py_None) { |
286 | arg = NULL; |
287 | } else if (!PyExceptionInstance_Check(arg)) { |
288 | PyErr_SetString(PyExc_TypeError, "exception cause must be None " |
289 | "or derive from BaseException" ); |
290 | return -1; |
291 | } else { |
292 | /* PyException_SetCause steals this reference */ |
293 | Py_INCREF(arg); |
294 | } |
295 | PyException_SetCause(self, arg); |
296 | return 0; |
297 | } |
298 | |
299 | |
300 | static PyGetSetDef BaseException_getset[] = { |
301 | {"__dict__" , PyObject_GenericGetDict, PyObject_GenericSetDict}, |
302 | {"args" , (getter)BaseException_get_args, (setter)BaseException_set_args}, |
303 | {"__traceback__" , (getter)BaseException_get_tb, (setter)BaseException_set_tb}, |
304 | {"__context__" , BaseException_get_context, |
305 | BaseException_set_context, PyDoc_STR("exception context" )}, |
306 | {"__cause__" , BaseException_get_cause, |
307 | BaseException_set_cause, PyDoc_STR("exception cause" )}, |
308 | {NULL}, |
309 | }; |
310 | |
311 | |
312 | static inline PyBaseExceptionObject* |
313 | _PyBaseExceptionObject_cast(PyObject *exc) |
314 | { |
315 | assert(PyExceptionInstance_Check(exc)); |
316 | return (PyBaseExceptionObject *)exc; |
317 | } |
318 | |
319 | |
320 | PyObject * |
321 | PyException_GetTraceback(PyObject *self) |
322 | { |
323 | PyBaseExceptionObject *base_self = _PyBaseExceptionObject_cast(self); |
324 | Py_XINCREF(base_self->traceback); |
325 | return base_self->traceback; |
326 | } |
327 | |
328 | |
329 | int |
330 | PyException_SetTraceback(PyObject *self, PyObject *tb) |
331 | { |
332 | return BaseException_set_tb(_PyBaseExceptionObject_cast(self), tb, NULL); |
333 | } |
334 | |
335 | PyObject * |
336 | PyException_GetCause(PyObject *self) |
337 | { |
338 | PyObject *cause = _PyBaseExceptionObject_cast(self)->cause; |
339 | Py_XINCREF(cause); |
340 | return cause; |
341 | } |
342 | |
343 | /* Steals a reference to cause */ |
344 | void |
345 | PyException_SetCause(PyObject *self, PyObject *cause) |
346 | { |
347 | PyBaseExceptionObject *base_self = _PyBaseExceptionObject_cast(self); |
348 | base_self->suppress_context = 1; |
349 | Py_XSETREF(base_self->cause, cause); |
350 | } |
351 | |
352 | PyObject * |
353 | PyException_GetContext(PyObject *self) |
354 | { |
355 | PyObject *context = _PyBaseExceptionObject_cast(self)->context; |
356 | Py_XINCREF(context); |
357 | return context; |
358 | } |
359 | |
360 | /* Steals a reference to context */ |
361 | void |
362 | PyException_SetContext(PyObject *self, PyObject *context) |
363 | { |
364 | Py_XSETREF(_PyBaseExceptionObject_cast(self)->context, context); |
365 | } |
366 | |
367 | const char * |
368 | PyExceptionClass_Name(PyObject *ob) |
369 | { |
370 | assert(PyExceptionClass_Check(ob)); |
371 | return ((PyTypeObject*)ob)->tp_name; |
372 | } |
373 | |
374 | static struct PyMemberDef BaseException_members[] = { |
375 | {"__suppress_context__" , T_BOOL, |
376 | offsetof(PyBaseExceptionObject, suppress_context)}, |
377 | {NULL} |
378 | }; |
379 | |
380 | |
381 | static PyTypeObject _PyExc_BaseException = { |
382 | PyVarObject_HEAD_INIT(NULL, 0) |
383 | "BaseException" , /*tp_name*/ |
384 | sizeof(PyBaseExceptionObject), /*tp_basicsize*/ |
385 | 0, /*tp_itemsize*/ |
386 | (destructor)BaseException_dealloc, /*tp_dealloc*/ |
387 | 0, /*tp_vectorcall_offset*/ |
388 | 0, /*tp_getattr*/ |
389 | 0, /*tp_setattr*/ |
390 | 0, /*tp_as_async*/ |
391 | (reprfunc)BaseException_repr, /*tp_repr*/ |
392 | 0, /*tp_as_number*/ |
393 | 0, /*tp_as_sequence*/ |
394 | 0, /*tp_as_mapping*/ |
395 | 0, /*tp_hash */ |
396 | 0, /*tp_call*/ |
397 | (reprfunc)BaseException_str, /*tp_str*/ |
398 | PyObject_GenericGetAttr, /*tp_getattro*/ |
399 | PyObject_GenericSetAttr, /*tp_setattro*/ |
400 | 0, /*tp_as_buffer*/ |
401 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC | |
402 | Py_TPFLAGS_BASE_EXC_SUBCLASS, /*tp_flags*/ |
403 | PyDoc_STR("Common base class for all exceptions" ), /* tp_doc */ |
404 | (traverseproc)BaseException_traverse, /* tp_traverse */ |
405 | (inquiry)BaseException_clear, /* tp_clear */ |
406 | 0, /* tp_richcompare */ |
407 | 0, /* tp_weaklistoffset */ |
408 | 0, /* tp_iter */ |
409 | 0, /* tp_iternext */ |
410 | BaseException_methods, /* tp_methods */ |
411 | BaseException_members, /* tp_members */ |
412 | BaseException_getset, /* tp_getset */ |
413 | 0, /* tp_base */ |
414 | 0, /* tp_dict */ |
415 | 0, /* tp_descr_get */ |
416 | 0, /* tp_descr_set */ |
417 | offsetof(PyBaseExceptionObject, dict), /* tp_dictoffset */ |
418 | (initproc)BaseException_init, /* tp_init */ |
419 | 0, /* tp_alloc */ |
420 | BaseException_new, /* tp_new */ |
421 | }; |
422 | /* the CPython API expects exceptions to be (PyObject *) - both a hold-over |
423 | from the previous implementation and also allowing Python objects to be used |
424 | in the API */ |
425 | PyObject *PyExc_BaseException = (PyObject *)&_PyExc_BaseException; |
426 | |
427 | /* note these macros omit the last semicolon so the macro invocation may |
428 | * include it and not look strange. |
429 | */ |
430 | #define SimpleExtendsException(EXCBASE, EXCNAME, EXCDOC) \ |
431 | static PyTypeObject _PyExc_ ## EXCNAME = { \ |
432 | PyVarObject_HEAD_INIT(NULL, 0) \ |
433 | # EXCNAME, \ |
434 | sizeof(PyBaseExceptionObject), \ |
435 | 0, (destructor)BaseException_dealloc, 0, 0, 0, 0, 0, 0, 0, \ |
436 | 0, 0, 0, 0, 0, 0, 0, \ |
437 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, \ |
438 | PyDoc_STR(EXCDOC), (traverseproc)BaseException_traverse, \ |
439 | (inquiry)BaseException_clear, 0, 0, 0, 0, 0, 0, 0, &_ ## EXCBASE, \ |
440 | 0, 0, 0, offsetof(PyBaseExceptionObject, dict), \ |
441 | (initproc)BaseException_init, 0, BaseException_new,\ |
442 | }; \ |
443 | PyObject *PyExc_ ## EXCNAME = (PyObject *)&_PyExc_ ## EXCNAME |
444 | |
445 | #define MiddlingExtendsException(EXCBASE, EXCNAME, EXCSTORE, EXCDOC) \ |
446 | static PyTypeObject _PyExc_ ## EXCNAME = { \ |
447 | PyVarObject_HEAD_INIT(NULL, 0) \ |
448 | # EXCNAME, \ |
449 | sizeof(Py ## EXCSTORE ## Object), \ |
450 | 0, (destructor)EXCSTORE ## _dealloc, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ |
451 | 0, 0, 0, 0, 0, \ |
452 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, \ |
453 | PyDoc_STR(EXCDOC), (traverseproc)EXCSTORE ## _traverse, \ |
454 | (inquiry)EXCSTORE ## _clear, 0, 0, 0, 0, 0, 0, 0, &_ ## EXCBASE, \ |
455 | 0, 0, 0, offsetof(Py ## EXCSTORE ## Object, dict), \ |
456 | (initproc)EXCSTORE ## _init, 0, 0, \ |
457 | }; \ |
458 | PyObject *PyExc_ ## EXCNAME = (PyObject *)&_PyExc_ ## EXCNAME |
459 | |
460 | #define ComplexExtendsException(EXCBASE, EXCNAME, EXCSTORE, EXCNEW, \ |
461 | EXCMETHODS, EXCMEMBERS, EXCGETSET, \ |
462 | EXCSTR, EXCDOC) \ |
463 | static PyTypeObject _PyExc_ ## EXCNAME = { \ |
464 | PyVarObject_HEAD_INIT(NULL, 0) \ |
465 | # EXCNAME, \ |
466 | sizeof(Py ## EXCSTORE ## Object), 0, \ |
467 | (destructor)EXCSTORE ## _dealloc, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ |
468 | (reprfunc)EXCSTR, 0, 0, 0, \ |
469 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, \ |
470 | PyDoc_STR(EXCDOC), (traverseproc)EXCSTORE ## _traverse, \ |
471 | (inquiry)EXCSTORE ## _clear, 0, 0, 0, 0, EXCMETHODS, \ |
472 | EXCMEMBERS, EXCGETSET, &_ ## EXCBASE, \ |
473 | 0, 0, 0, offsetof(Py ## EXCSTORE ## Object, dict), \ |
474 | (initproc)EXCSTORE ## _init, 0, EXCNEW,\ |
475 | }; \ |
476 | PyObject *PyExc_ ## EXCNAME = (PyObject *)&_PyExc_ ## EXCNAME |
477 | |
478 | |
479 | /* |
480 | * Exception extends BaseException |
481 | */ |
482 | SimpleExtendsException(PyExc_BaseException, Exception, |
483 | "Common base class for all non-exit exceptions." ); |
484 | |
485 | |
486 | /* |
487 | * TypeError extends Exception |
488 | */ |
489 | SimpleExtendsException(PyExc_Exception, TypeError, |
490 | "Inappropriate argument type." ); |
491 | |
492 | |
493 | /* |
494 | * StopAsyncIteration extends Exception |
495 | */ |
496 | SimpleExtendsException(PyExc_Exception, StopAsyncIteration, |
497 | "Signal the end from iterator.__anext__()." ); |
498 | |
499 | |
500 | /* |
501 | * StopIteration extends Exception |
502 | */ |
503 | |
504 | static PyMemberDef StopIteration_members[] = { |
505 | {"value" , T_OBJECT, offsetof(PyStopIterationObject, value), 0, |
506 | PyDoc_STR("generator return value" )}, |
507 | {NULL} /* Sentinel */ |
508 | }; |
509 | |
510 | static int |
511 | StopIteration_init(PyStopIterationObject *self, PyObject *args, PyObject *kwds) |
512 | { |
513 | Py_ssize_t size = PyTuple_GET_SIZE(args); |
514 | PyObject *value; |
515 | |
516 | if (BaseException_init((PyBaseExceptionObject *)self, args, kwds) == -1) |
517 | return -1; |
518 | Py_CLEAR(self->value); |
519 | if (size > 0) |
520 | value = PyTuple_GET_ITEM(args, 0); |
521 | else |
522 | value = Py_None; |
523 | Py_INCREF(value); |
524 | self->value = value; |
525 | return 0; |
526 | } |
527 | |
528 | static int |
529 | StopIteration_clear(PyStopIterationObject *self) |
530 | { |
531 | Py_CLEAR(self->value); |
532 | return BaseException_clear((PyBaseExceptionObject *)self); |
533 | } |
534 | |
535 | static void |
536 | StopIteration_dealloc(PyStopIterationObject *self) |
537 | { |
538 | _PyObject_GC_UNTRACK(self); |
539 | StopIteration_clear(self); |
540 | Py_TYPE(self)->tp_free((PyObject *)self); |
541 | } |
542 | |
543 | static int |
544 | StopIteration_traverse(PyStopIterationObject *self, visitproc visit, void *arg) |
545 | { |
546 | Py_VISIT(self->value); |
547 | return BaseException_traverse((PyBaseExceptionObject *)self, visit, arg); |
548 | } |
549 | |
550 | ComplexExtendsException( |
551 | PyExc_Exception, /* base */ |
552 | StopIteration, /* name */ |
553 | StopIteration, /* prefix for *_init, etc */ |
554 | 0, /* new */ |
555 | 0, /* methods */ |
556 | StopIteration_members, /* members */ |
557 | 0, /* getset */ |
558 | 0, /* str */ |
559 | "Signal the end from iterator.__next__()." |
560 | ); |
561 | |
562 | |
563 | /* |
564 | * GeneratorExit extends BaseException |
565 | */ |
566 | SimpleExtendsException(PyExc_BaseException, GeneratorExit, |
567 | "Request that a generator exit." ); |
568 | |
569 | |
570 | /* |
571 | * SystemExit extends BaseException |
572 | */ |
573 | |
574 | static int |
575 | SystemExit_init(PySystemExitObject *self, PyObject *args, PyObject *kwds) |
576 | { |
577 | Py_ssize_t size = PyTuple_GET_SIZE(args); |
578 | |
579 | if (BaseException_init((PyBaseExceptionObject *)self, args, kwds) == -1) |
580 | return -1; |
581 | |
582 | if (size == 0) |
583 | return 0; |
584 | if (size == 1) { |
585 | Py_INCREF(PyTuple_GET_ITEM(args, 0)); |
586 | Py_XSETREF(self->code, PyTuple_GET_ITEM(args, 0)); |
587 | } |
588 | else { /* size > 1 */ |
589 | Py_INCREF(args); |
590 | Py_XSETREF(self->code, args); |
591 | } |
592 | return 0; |
593 | } |
594 | |
595 | static int |
596 | SystemExit_clear(PySystemExitObject *self) |
597 | { |
598 | Py_CLEAR(self->code); |
599 | return BaseException_clear((PyBaseExceptionObject *)self); |
600 | } |
601 | |
602 | static void |
603 | SystemExit_dealloc(PySystemExitObject *self) |
604 | { |
605 | _PyObject_GC_UNTRACK(self); |
606 | SystemExit_clear(self); |
607 | Py_TYPE(self)->tp_free((PyObject *)self); |
608 | } |
609 | |
610 | static int |
611 | SystemExit_traverse(PySystemExitObject *self, visitproc visit, void *arg) |
612 | { |
613 | Py_VISIT(self->code); |
614 | return BaseException_traverse((PyBaseExceptionObject *)self, visit, arg); |
615 | } |
616 | |
617 | static PyMemberDef SystemExit_members[] = { |
618 | {"code" , T_OBJECT, offsetof(PySystemExitObject, code), 0, |
619 | PyDoc_STR("exception code" )}, |
620 | {NULL} /* Sentinel */ |
621 | }; |
622 | |
623 | ComplexExtendsException(PyExc_BaseException, SystemExit, SystemExit, |
624 | 0, 0, SystemExit_members, 0, 0, |
625 | "Request to exit from the interpreter." ); |
626 | |
627 | /* |
628 | * KeyboardInterrupt extends BaseException |
629 | */ |
630 | SimpleExtendsException(PyExc_BaseException, KeyboardInterrupt, |
631 | "Program interrupted by user." ); |
632 | |
633 | |
634 | /* |
635 | * ImportError extends Exception |
636 | */ |
637 | |
638 | static int |
639 | ImportError_init(PyImportErrorObject *self, PyObject *args, PyObject *kwds) |
640 | { |
641 | static char *kwlist[] = {"name" , "path" , 0}; |
642 | PyObject *empty_tuple; |
643 | PyObject *msg = NULL; |
644 | PyObject *name = NULL; |
645 | PyObject *path = NULL; |
646 | |
647 | if (BaseException_init((PyBaseExceptionObject *)self, args, NULL) == -1) |
648 | return -1; |
649 | |
650 | empty_tuple = PyTuple_New(0); |
651 | if (!empty_tuple) |
652 | return -1; |
653 | if (!PyArg_ParseTupleAndKeywords(empty_tuple, kwds, "|$OO:ImportError" , kwlist, |
654 | &name, &path)) { |
655 | Py_DECREF(empty_tuple); |
656 | return -1; |
657 | } |
658 | Py_DECREF(empty_tuple); |
659 | |
660 | Py_XINCREF(name); |
661 | Py_XSETREF(self->name, name); |
662 | |
663 | Py_XINCREF(path); |
664 | Py_XSETREF(self->path, path); |
665 | |
666 | if (PyTuple_GET_SIZE(args) == 1) { |
667 | msg = PyTuple_GET_ITEM(args, 0); |
668 | Py_INCREF(msg); |
669 | } |
670 | Py_XSETREF(self->msg, msg); |
671 | |
672 | return 0; |
673 | } |
674 | |
675 | static int |
676 | ImportError_clear(PyImportErrorObject *self) |
677 | { |
678 | Py_CLEAR(self->msg); |
679 | Py_CLEAR(self->name); |
680 | Py_CLEAR(self->path); |
681 | return BaseException_clear((PyBaseExceptionObject *)self); |
682 | } |
683 | |
684 | static void |
685 | ImportError_dealloc(PyImportErrorObject *self) |
686 | { |
687 | _PyObject_GC_UNTRACK(self); |
688 | ImportError_clear(self); |
689 | Py_TYPE(self)->tp_free((PyObject *)self); |
690 | } |
691 | |
692 | static int |
693 | ImportError_traverse(PyImportErrorObject *self, visitproc visit, void *arg) |
694 | { |
695 | Py_VISIT(self->msg); |
696 | Py_VISIT(self->name); |
697 | Py_VISIT(self->path); |
698 | return BaseException_traverse((PyBaseExceptionObject *)self, visit, arg); |
699 | } |
700 | |
701 | static PyObject * |
702 | ImportError_str(PyImportErrorObject *self) |
703 | { |
704 | if (self->msg && PyUnicode_CheckExact(self->msg)) { |
705 | Py_INCREF(self->msg); |
706 | return self->msg; |
707 | } |
708 | else { |
709 | return BaseException_str((PyBaseExceptionObject *)self); |
710 | } |
711 | } |
712 | |
713 | static PyObject * |
714 | ImportError_getstate(PyImportErrorObject *self) |
715 | { |
716 | PyObject *dict = ((PyBaseExceptionObject *)self)->dict; |
717 | if (self->name || self->path) { |
718 | _Py_IDENTIFIER(name); |
719 | _Py_IDENTIFIER(path); |
720 | dict = dict ? PyDict_Copy(dict) : PyDict_New(); |
721 | if (dict == NULL) |
722 | return NULL; |
723 | if (self->name && _PyDict_SetItemId(dict, &PyId_name, self->name) < 0) { |
724 | Py_DECREF(dict); |
725 | return NULL; |
726 | } |
727 | if (self->path && _PyDict_SetItemId(dict, &PyId_path, self->path) < 0) { |
728 | Py_DECREF(dict); |
729 | return NULL; |
730 | } |
731 | return dict; |
732 | } |
733 | else if (dict) { |
734 | Py_INCREF(dict); |
735 | return dict; |
736 | } |
737 | else { |
738 | Py_RETURN_NONE; |
739 | } |
740 | } |
741 | |
742 | /* Pickling support */ |
743 | static PyObject * |
744 | ImportError_reduce(PyImportErrorObject *self, PyObject *Py_UNUSED(ignored)) |
745 | { |
746 | PyObject *res; |
747 | PyObject *args; |
748 | PyObject *state = ImportError_getstate(self); |
749 | if (state == NULL) |
750 | return NULL; |
751 | args = ((PyBaseExceptionObject *)self)->args; |
752 | if (state == Py_None) |
753 | res = PyTuple_Pack(2, Py_TYPE(self), args); |
754 | else |
755 | res = PyTuple_Pack(3, Py_TYPE(self), args, state); |
756 | Py_DECREF(state); |
757 | return res; |
758 | } |
759 | |
760 | static PyMemberDef ImportError_members[] = { |
761 | {"msg" , T_OBJECT, offsetof(PyImportErrorObject, msg), 0, |
762 | PyDoc_STR("exception message" )}, |
763 | {"name" , T_OBJECT, offsetof(PyImportErrorObject, name), 0, |
764 | PyDoc_STR("module name" )}, |
765 | {"path" , T_OBJECT, offsetof(PyImportErrorObject, path), 0, |
766 | PyDoc_STR("module path" )}, |
767 | {NULL} /* Sentinel */ |
768 | }; |
769 | |
770 | static PyMethodDef ImportError_methods[] = { |
771 | {"__reduce__" , (PyCFunction)ImportError_reduce, METH_NOARGS}, |
772 | {NULL} |
773 | }; |
774 | |
775 | ComplexExtendsException(PyExc_Exception, ImportError, |
776 | ImportError, 0 /* new */, |
777 | ImportError_methods, ImportError_members, |
778 | 0 /* getset */, ImportError_str, |
779 | "Import can't find module, or can't find name in " |
780 | "module." ); |
781 | |
782 | /* |
783 | * ModuleNotFoundError extends ImportError |
784 | */ |
785 | |
786 | MiddlingExtendsException(PyExc_ImportError, ModuleNotFoundError, ImportError, |
787 | "Module not found." ); |
788 | |
789 | /* |
790 | * OSError extends Exception |
791 | */ |
792 | |
793 | #ifdef MS_WINDOWS |
794 | #include "errmap.h" |
795 | #endif |
796 | |
797 | /* Where a function has a single filename, such as open() or some |
798 | * of the os module functions, PyErr_SetFromErrnoWithFilename() is |
799 | * called, giving a third argument which is the filename. But, so |
800 | * that old code using in-place unpacking doesn't break, e.g.: |
801 | * |
802 | * except OSError, (errno, strerror): |
803 | * |
804 | * we hack args so that it only contains two items. This also |
805 | * means we need our own __str__() which prints out the filename |
806 | * when it was supplied. |
807 | * |
808 | * (If a function has two filenames, such as rename(), symlink(), |
809 | * or copy(), PyErr_SetFromErrnoWithFilenameObjects() is called, |
810 | * which allows passing in a second filename.) |
811 | */ |
812 | |
813 | /* This function doesn't cleanup on error, the caller should */ |
814 | static int |
815 | oserror_parse_args(PyObject **p_args, |
816 | PyObject **myerrno, PyObject **strerror, |
817 | PyObject **filename, PyObject **filename2 |
818 | #ifdef MS_WINDOWS |
819 | , PyObject **winerror |
820 | #endif |
821 | ) |
822 | { |
823 | Py_ssize_t nargs; |
824 | PyObject *args = *p_args; |
825 | #ifndef MS_WINDOWS |
826 | /* |
827 | * ignored on non-Windows platforms, |
828 | * but parsed so OSError has a consistent signature |
829 | */ |
830 | PyObject *_winerror = NULL; |
831 | PyObject **winerror = &_winerror; |
832 | #endif /* MS_WINDOWS */ |
833 | |
834 | nargs = PyTuple_GET_SIZE(args); |
835 | |
836 | if (nargs >= 2 && nargs <= 5) { |
837 | if (!PyArg_UnpackTuple(args, "OSError" , 2, 5, |
838 | myerrno, strerror, |
839 | filename, winerror, filename2)) |
840 | return -1; |
841 | #ifdef MS_WINDOWS |
842 | if (*winerror && PyLong_Check(*winerror)) { |
843 | long errcode, winerrcode; |
844 | PyObject *newargs; |
845 | Py_ssize_t i; |
846 | |
847 | winerrcode = PyLong_AsLong(*winerror); |
848 | if (winerrcode == -1 && PyErr_Occurred()) |
849 | return -1; |
850 | errcode = winerror_to_errno(winerrcode); |
851 | *myerrno = PyLong_FromLong(errcode); |
852 | if (!*myerrno) |
853 | return -1; |
854 | newargs = PyTuple_New(nargs); |
855 | if (!newargs) |
856 | return -1; |
857 | PyTuple_SET_ITEM(newargs, 0, *myerrno); |
858 | for (i = 1; i < nargs; i++) { |
859 | PyObject *val = PyTuple_GET_ITEM(args, i); |
860 | Py_INCREF(val); |
861 | PyTuple_SET_ITEM(newargs, i, val); |
862 | } |
863 | Py_DECREF(args); |
864 | args = *p_args = newargs; |
865 | } |
866 | #endif /* MS_WINDOWS */ |
867 | } |
868 | |
869 | return 0; |
870 | } |
871 | |
872 | static int |
873 | oserror_init(PyOSErrorObject *self, PyObject **p_args, |
874 | PyObject *myerrno, PyObject *strerror, |
875 | PyObject *filename, PyObject *filename2 |
876 | #ifdef MS_WINDOWS |
877 | , PyObject *winerror |
878 | #endif |
879 | ) |
880 | { |
881 | PyObject *args = *p_args; |
882 | Py_ssize_t nargs = PyTuple_GET_SIZE(args); |
883 | |
884 | /* self->filename will remain Py_None otherwise */ |
885 | if (filename && filename != Py_None) { |
886 | if (Py_IS_TYPE(self, (PyTypeObject *) PyExc_BlockingIOError) && |
887 | PyNumber_Check(filename)) { |
888 | /* BlockingIOError's 3rd argument can be the number of |
889 | * characters written. |
890 | */ |
891 | self->written = PyNumber_AsSsize_t(filename, PyExc_ValueError); |
892 | if (self->written == -1 && PyErr_Occurred()) |
893 | return -1; |
894 | } |
895 | else { |
896 | Py_INCREF(filename); |
897 | self->filename = filename; |
898 | |
899 | if (filename2 && filename2 != Py_None) { |
900 | Py_INCREF(filename2); |
901 | self->filename2 = filename2; |
902 | } |
903 | |
904 | if (nargs >= 2 && nargs <= 5) { |
905 | /* filename, filename2, and winerror are removed from the args tuple |
906 | (for compatibility purposes, see test_exceptions.py) */ |
907 | PyObject *subslice = PyTuple_GetSlice(args, 0, 2); |
908 | if (!subslice) |
909 | return -1; |
910 | |
911 | Py_DECREF(args); /* replacing args */ |
912 | *p_args = args = subslice; |
913 | } |
914 | } |
915 | } |
916 | Py_XINCREF(myerrno); |
917 | self->myerrno = myerrno; |
918 | |
919 | Py_XINCREF(strerror); |
920 | self->strerror = strerror; |
921 | |
922 | #ifdef MS_WINDOWS |
923 | Py_XINCREF(winerror); |
924 | self->winerror = winerror; |
925 | #endif |
926 | |
927 | /* Steals the reference to args */ |
928 | Py_XSETREF(self->args, args); |
929 | *p_args = args = NULL; |
930 | |
931 | return 0; |
932 | } |
933 | |
934 | static PyObject * |
935 | OSError_new(PyTypeObject *type, PyObject *args, PyObject *kwds); |
936 | static int |
937 | OSError_init(PyOSErrorObject *self, PyObject *args, PyObject *kwds); |
938 | |
939 | static int |
940 | oserror_use_init(PyTypeObject *type) |
941 | { |
942 | /* When __init__ is defined in an OSError subclass, we want any |
943 | extraneous argument to __new__ to be ignored. The only reasonable |
944 | solution, given __new__ takes a variable number of arguments, |
945 | is to defer arg parsing and initialization to __init__. |
946 | |
947 | But when __new__ is overridden as well, it should call our __new__ |
948 | with the right arguments. |
949 | |
950 | (see http://bugs.python.org/issue12555#msg148829 ) |
951 | */ |
952 | if (type->tp_init != (initproc) OSError_init && |
953 | type->tp_new == (newfunc) OSError_new) { |
954 | assert((PyObject *) type != PyExc_OSError); |
955 | return 1; |
956 | } |
957 | return 0; |
958 | } |
959 | |
960 | static PyObject * |
961 | OSError_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
962 | { |
963 | PyOSErrorObject *self = NULL; |
964 | PyObject *myerrno = NULL, *strerror = NULL; |
965 | PyObject *filename = NULL, *filename2 = NULL; |
966 | #ifdef MS_WINDOWS |
967 | PyObject *winerror = NULL; |
968 | #endif |
969 | |
970 | Py_INCREF(args); |
971 | |
972 | if (!oserror_use_init(type)) { |
973 | if (!_PyArg_NoKeywords(type->tp_name, kwds)) |
974 | goto error; |
975 | |
976 | if (oserror_parse_args(&args, &myerrno, &strerror, |
977 | &filename, &filename2 |
978 | #ifdef MS_WINDOWS |
979 | , &winerror |
980 | #endif |
981 | )) |
982 | goto error; |
983 | |
984 | struct _Py_exc_state *state = get_exc_state(); |
985 | if (myerrno && PyLong_Check(myerrno) && |
986 | state->errnomap && (PyObject *) type == PyExc_OSError) { |
987 | PyObject *newtype; |
988 | newtype = PyDict_GetItemWithError(state->errnomap, myerrno); |
989 | if (newtype) { |
990 | assert(PyType_Check(newtype)); |
991 | type = (PyTypeObject *) newtype; |
992 | } |
993 | else if (PyErr_Occurred()) |
994 | goto error; |
995 | } |
996 | } |
997 | |
998 | self = (PyOSErrorObject *) type->tp_alloc(type, 0); |
999 | if (!self) |
1000 | goto error; |
1001 | |
1002 | self->dict = NULL; |
1003 | self->traceback = self->cause = self->context = NULL; |
1004 | self->written = -1; |
1005 | |
1006 | if (!oserror_use_init(type)) { |
1007 | if (oserror_init(self, &args, myerrno, strerror, filename, filename2 |
1008 | #ifdef MS_WINDOWS |
1009 | , winerror |
1010 | #endif |
1011 | )) |
1012 | goto error; |
1013 | } |
1014 | else { |
1015 | self->args = PyTuple_New(0); |
1016 | if (self->args == NULL) |
1017 | goto error; |
1018 | } |
1019 | |
1020 | Py_XDECREF(args); |
1021 | return (PyObject *) self; |
1022 | |
1023 | error: |
1024 | Py_XDECREF(args); |
1025 | Py_XDECREF(self); |
1026 | return NULL; |
1027 | } |
1028 | |
1029 | static int |
1030 | OSError_init(PyOSErrorObject *self, PyObject *args, PyObject *kwds) |
1031 | { |
1032 | PyObject *myerrno = NULL, *strerror = NULL; |
1033 | PyObject *filename = NULL, *filename2 = NULL; |
1034 | #ifdef MS_WINDOWS |
1035 | PyObject *winerror = NULL; |
1036 | #endif |
1037 | |
1038 | if (!oserror_use_init(Py_TYPE(self))) |
1039 | /* Everything already done in OSError_new */ |
1040 | return 0; |
1041 | |
1042 | if (!_PyArg_NoKeywords(Py_TYPE(self)->tp_name, kwds)) |
1043 | return -1; |
1044 | |
1045 | Py_INCREF(args); |
1046 | if (oserror_parse_args(&args, &myerrno, &strerror, &filename, &filename2 |
1047 | #ifdef MS_WINDOWS |
1048 | , &winerror |
1049 | #endif |
1050 | )) |
1051 | goto error; |
1052 | |
1053 | if (oserror_init(self, &args, myerrno, strerror, filename, filename2 |
1054 | #ifdef MS_WINDOWS |
1055 | , winerror |
1056 | #endif |
1057 | )) |
1058 | goto error; |
1059 | |
1060 | return 0; |
1061 | |
1062 | error: |
1063 | Py_DECREF(args); |
1064 | return -1; |
1065 | } |
1066 | |
1067 | static int |
1068 | OSError_clear(PyOSErrorObject *self) |
1069 | { |
1070 | Py_CLEAR(self->myerrno); |
1071 | Py_CLEAR(self->strerror); |
1072 | Py_CLEAR(self->filename); |
1073 | Py_CLEAR(self->filename2); |
1074 | #ifdef MS_WINDOWS |
1075 | Py_CLEAR(self->winerror); |
1076 | #endif |
1077 | return BaseException_clear((PyBaseExceptionObject *)self); |
1078 | } |
1079 | |
1080 | static void |
1081 | OSError_dealloc(PyOSErrorObject *self) |
1082 | { |
1083 | _PyObject_GC_UNTRACK(self); |
1084 | OSError_clear(self); |
1085 | Py_TYPE(self)->tp_free((PyObject *)self); |
1086 | } |
1087 | |
1088 | static int |
1089 | OSError_traverse(PyOSErrorObject *self, visitproc visit, |
1090 | void *arg) |
1091 | { |
1092 | Py_VISIT(self->myerrno); |
1093 | Py_VISIT(self->strerror); |
1094 | Py_VISIT(self->filename); |
1095 | Py_VISIT(self->filename2); |
1096 | #ifdef MS_WINDOWS |
1097 | Py_VISIT(self->winerror); |
1098 | #endif |
1099 | return BaseException_traverse((PyBaseExceptionObject *)self, visit, arg); |
1100 | } |
1101 | |
1102 | static PyObject * |
1103 | OSError_str(PyOSErrorObject *self) |
1104 | { |
1105 | #define OR_NONE(x) ((x)?(x):Py_None) |
1106 | #ifdef MS_WINDOWS |
1107 | /* If available, winerror has the priority over myerrno */ |
1108 | if (self->winerror && self->filename) { |
1109 | if (self->filename2) { |
1110 | return PyUnicode_FromFormat("[WinError %S] %S: %R -> %R" , |
1111 | OR_NONE(self->winerror), |
1112 | OR_NONE(self->strerror), |
1113 | self->filename, |
1114 | self->filename2); |
1115 | } else { |
1116 | return PyUnicode_FromFormat("[WinError %S] %S: %R" , |
1117 | OR_NONE(self->winerror), |
1118 | OR_NONE(self->strerror), |
1119 | self->filename); |
1120 | } |
1121 | } |
1122 | if (self->winerror && self->strerror) |
1123 | return PyUnicode_FromFormat("[WinError %S] %S" , |
1124 | self->winerror ? self->winerror: Py_None, |
1125 | self->strerror ? self->strerror: Py_None); |
1126 | #endif |
1127 | if (self->filename) { |
1128 | if (self->filename2) { |
1129 | return PyUnicode_FromFormat("[Errno %S] %S: %R -> %R" , |
1130 | OR_NONE(self->myerrno), |
1131 | OR_NONE(self->strerror), |
1132 | self->filename, |
1133 | self->filename2); |
1134 | } else { |
1135 | return PyUnicode_FromFormat("[Errno %S] %S: %R" , |
1136 | OR_NONE(self->myerrno), |
1137 | OR_NONE(self->strerror), |
1138 | self->filename); |
1139 | } |
1140 | } |
1141 | if (self->myerrno && self->strerror) |
1142 | return PyUnicode_FromFormat("[Errno %S] %S" , |
1143 | self->myerrno, self->strerror); |
1144 | return BaseException_str((PyBaseExceptionObject *)self); |
1145 | } |
1146 | |
1147 | static PyObject * |
1148 | OSError_reduce(PyOSErrorObject *self, PyObject *Py_UNUSED(ignored)) |
1149 | { |
1150 | PyObject *args = self->args; |
1151 | PyObject *res = NULL, *tmp; |
1152 | |
1153 | /* self->args is only the first two real arguments if there was a |
1154 | * file name given to OSError. */ |
1155 | if (PyTuple_GET_SIZE(args) == 2 && self->filename) { |
1156 | Py_ssize_t size = self->filename2 ? 5 : 3; |
1157 | args = PyTuple_New(size); |
1158 | if (!args) |
1159 | return NULL; |
1160 | |
1161 | tmp = PyTuple_GET_ITEM(self->args, 0); |
1162 | Py_INCREF(tmp); |
1163 | PyTuple_SET_ITEM(args, 0, tmp); |
1164 | |
1165 | tmp = PyTuple_GET_ITEM(self->args, 1); |
1166 | Py_INCREF(tmp); |
1167 | PyTuple_SET_ITEM(args, 1, tmp); |
1168 | |
1169 | Py_INCREF(self->filename); |
1170 | PyTuple_SET_ITEM(args, 2, self->filename); |
1171 | |
1172 | if (self->filename2) { |
1173 | /* |
1174 | * This tuple is essentially used as OSError(*args). |
1175 | * So, to recreate filename2, we need to pass in |
1176 | * winerror as well. |
1177 | */ |
1178 | Py_INCREF(Py_None); |
1179 | PyTuple_SET_ITEM(args, 3, Py_None); |
1180 | |
1181 | /* filename2 */ |
1182 | Py_INCREF(self->filename2); |
1183 | PyTuple_SET_ITEM(args, 4, self->filename2); |
1184 | } |
1185 | } else |
1186 | Py_INCREF(args); |
1187 | |
1188 | if (self->dict) |
1189 | res = PyTuple_Pack(3, Py_TYPE(self), args, self->dict); |
1190 | else |
1191 | res = PyTuple_Pack(2, Py_TYPE(self), args); |
1192 | Py_DECREF(args); |
1193 | return res; |
1194 | } |
1195 | |
1196 | static PyObject * |
1197 | OSError_written_get(PyOSErrorObject *self, void *context) |
1198 | { |
1199 | if (self->written == -1) { |
1200 | PyErr_SetString(PyExc_AttributeError, "characters_written" ); |
1201 | return NULL; |
1202 | } |
1203 | return PyLong_FromSsize_t(self->written); |
1204 | } |
1205 | |
1206 | static int |
1207 | OSError_written_set(PyOSErrorObject *self, PyObject *arg, void *context) |
1208 | { |
1209 | if (arg == NULL) { |
1210 | if (self->written == -1) { |
1211 | PyErr_SetString(PyExc_AttributeError, "characters_written" ); |
1212 | return -1; |
1213 | } |
1214 | self->written = -1; |
1215 | return 0; |
1216 | } |
1217 | Py_ssize_t n; |
1218 | n = PyNumber_AsSsize_t(arg, PyExc_ValueError); |
1219 | if (n == -1 && PyErr_Occurred()) |
1220 | return -1; |
1221 | self->written = n; |
1222 | return 0; |
1223 | } |
1224 | |
1225 | static PyMemberDef OSError_members[] = { |
1226 | {"errno" , T_OBJECT, offsetof(PyOSErrorObject, myerrno), 0, |
1227 | PyDoc_STR("POSIX exception code" )}, |
1228 | {"strerror" , T_OBJECT, offsetof(PyOSErrorObject, strerror), 0, |
1229 | PyDoc_STR("exception strerror" )}, |
1230 | {"filename" , T_OBJECT, offsetof(PyOSErrorObject, filename), 0, |
1231 | PyDoc_STR("exception filename" )}, |
1232 | {"filename2" , T_OBJECT, offsetof(PyOSErrorObject, filename2), 0, |
1233 | PyDoc_STR("second exception filename" )}, |
1234 | #ifdef MS_WINDOWS |
1235 | {"winerror" , T_OBJECT, offsetof(PyOSErrorObject, winerror), 0, |
1236 | PyDoc_STR("Win32 exception code" )}, |
1237 | #endif |
1238 | {NULL} /* Sentinel */ |
1239 | }; |
1240 | |
1241 | static PyMethodDef OSError_methods[] = { |
1242 | {"__reduce__" , (PyCFunction)OSError_reduce, METH_NOARGS}, |
1243 | {NULL} |
1244 | }; |
1245 | |
1246 | static PyGetSetDef OSError_getset[] = { |
1247 | {"characters_written" , (getter) OSError_written_get, |
1248 | (setter) OSError_written_set, NULL}, |
1249 | {NULL} |
1250 | }; |
1251 | |
1252 | |
1253 | ComplexExtendsException(PyExc_Exception, OSError, |
1254 | OSError, OSError_new, |
1255 | OSError_methods, OSError_members, OSError_getset, |
1256 | OSError_str, |
1257 | "Base class for I/O related errors." ); |
1258 | |
1259 | |
1260 | /* |
1261 | * Various OSError subclasses |
1262 | */ |
1263 | MiddlingExtendsException(PyExc_OSError, BlockingIOError, OSError, |
1264 | "I/O operation would block." ); |
1265 | MiddlingExtendsException(PyExc_OSError, ConnectionError, OSError, |
1266 | "Connection error." ); |
1267 | MiddlingExtendsException(PyExc_OSError, ChildProcessError, OSError, |
1268 | "Child process error." ); |
1269 | MiddlingExtendsException(PyExc_ConnectionError, BrokenPipeError, OSError, |
1270 | "Broken pipe." ); |
1271 | MiddlingExtendsException(PyExc_ConnectionError, ConnectionAbortedError, OSError, |
1272 | "Connection aborted." ); |
1273 | MiddlingExtendsException(PyExc_ConnectionError, ConnectionRefusedError, OSError, |
1274 | "Connection refused." ); |
1275 | MiddlingExtendsException(PyExc_ConnectionError, ConnectionResetError, OSError, |
1276 | "Connection reset." ); |
1277 | MiddlingExtendsException(PyExc_OSError, FileExistsError, OSError, |
1278 | "File already exists." ); |
1279 | MiddlingExtendsException(PyExc_OSError, FileNotFoundError, OSError, |
1280 | "File not found." ); |
1281 | MiddlingExtendsException(PyExc_OSError, IsADirectoryError, OSError, |
1282 | "Operation doesn't work on directories." ); |
1283 | MiddlingExtendsException(PyExc_OSError, NotADirectoryError, OSError, |
1284 | "Operation only works on directories." ); |
1285 | MiddlingExtendsException(PyExc_OSError, InterruptedError, OSError, |
1286 | "Interrupted by signal." ); |
1287 | MiddlingExtendsException(PyExc_OSError, PermissionError, OSError, |
1288 | "Not enough permissions." ); |
1289 | MiddlingExtendsException(PyExc_OSError, ProcessLookupError, OSError, |
1290 | "Process not found." ); |
1291 | MiddlingExtendsException(PyExc_OSError, TimeoutError, OSError, |
1292 | "Timeout expired." ); |
1293 | |
1294 | /* |
1295 | * EOFError extends Exception |
1296 | */ |
1297 | SimpleExtendsException(PyExc_Exception, EOFError, |
1298 | "Read beyond end of file." ); |
1299 | |
1300 | |
1301 | /* |
1302 | * RuntimeError extends Exception |
1303 | */ |
1304 | SimpleExtendsException(PyExc_Exception, RuntimeError, |
1305 | "Unspecified run-time error." ); |
1306 | |
1307 | /* |
1308 | * RecursionError extends RuntimeError |
1309 | */ |
1310 | SimpleExtendsException(PyExc_RuntimeError, RecursionError, |
1311 | "Recursion limit exceeded." ); |
1312 | |
1313 | /* |
1314 | * NotImplementedError extends RuntimeError |
1315 | */ |
1316 | SimpleExtendsException(PyExc_RuntimeError, NotImplementedError, |
1317 | "Method or function hasn't been implemented yet." ); |
1318 | |
1319 | /* |
1320 | * NameError extends Exception |
1321 | */ |
1322 | |
1323 | static int |
1324 | NameError_init(PyNameErrorObject *self, PyObject *args, PyObject *kwds) |
1325 | { |
1326 | static char *kwlist[] = {"name" , NULL}; |
1327 | PyObject *name = NULL; |
1328 | |
1329 | if (BaseException_init((PyBaseExceptionObject *)self, args, NULL) == -1) { |
1330 | return -1; |
1331 | } |
1332 | |
1333 | PyObject *empty_tuple = PyTuple_New(0); |
1334 | if (!empty_tuple) { |
1335 | return -1; |
1336 | } |
1337 | if (!PyArg_ParseTupleAndKeywords(empty_tuple, kwds, "|$O:NameError" , kwlist, |
1338 | &name)) { |
1339 | Py_DECREF(empty_tuple); |
1340 | return -1; |
1341 | } |
1342 | Py_DECREF(empty_tuple); |
1343 | |
1344 | Py_XINCREF(name); |
1345 | Py_XSETREF(self->name, name); |
1346 | |
1347 | return 0; |
1348 | } |
1349 | |
1350 | static int |
1351 | NameError_clear(PyNameErrorObject *self) |
1352 | { |
1353 | Py_CLEAR(self->name); |
1354 | return BaseException_clear((PyBaseExceptionObject *)self); |
1355 | } |
1356 | |
1357 | static void |
1358 | NameError_dealloc(PyNameErrorObject *self) |
1359 | { |
1360 | _PyObject_GC_UNTRACK(self); |
1361 | NameError_clear(self); |
1362 | Py_TYPE(self)->tp_free((PyObject *)self); |
1363 | } |
1364 | |
1365 | static int |
1366 | NameError_traverse(PyNameErrorObject *self, visitproc visit, void *arg) |
1367 | { |
1368 | Py_VISIT(self->name); |
1369 | return BaseException_traverse((PyBaseExceptionObject *)self, visit, arg); |
1370 | } |
1371 | |
1372 | static PyMemberDef NameError_members[] = { |
1373 | {"name" , T_OBJECT, offsetof(PyNameErrorObject, name), 0, PyDoc_STR("name" )}, |
1374 | {NULL} /* Sentinel */ |
1375 | }; |
1376 | |
1377 | static PyMethodDef NameError_methods[] = { |
1378 | {NULL} /* Sentinel */ |
1379 | }; |
1380 | |
1381 | ComplexExtendsException(PyExc_Exception, NameError, |
1382 | NameError, 0, |
1383 | NameError_methods, NameError_members, |
1384 | 0, BaseException_str, "Name not found globally." ); |
1385 | |
1386 | /* |
1387 | * UnboundLocalError extends NameError |
1388 | */ |
1389 | |
1390 | MiddlingExtendsException(PyExc_NameError, UnboundLocalError, NameError, |
1391 | "Local name referenced but not bound to a value." ); |
1392 | |
1393 | /* |
1394 | * AttributeError extends Exception |
1395 | */ |
1396 | |
1397 | static int |
1398 | AttributeError_init(PyAttributeErrorObject *self, PyObject *args, PyObject *kwds) |
1399 | { |
1400 | static char *kwlist[] = {"name" , "obj" , NULL}; |
1401 | PyObject *name = NULL; |
1402 | PyObject *obj = NULL; |
1403 | |
1404 | if (BaseException_init((PyBaseExceptionObject *)self, args, NULL) == -1) { |
1405 | return -1; |
1406 | } |
1407 | |
1408 | PyObject *empty_tuple = PyTuple_New(0); |
1409 | if (!empty_tuple) { |
1410 | return -1; |
1411 | } |
1412 | if (!PyArg_ParseTupleAndKeywords(empty_tuple, kwds, "|$OO:AttributeError" , kwlist, |
1413 | &name, &obj)) { |
1414 | Py_DECREF(empty_tuple); |
1415 | return -1; |
1416 | } |
1417 | Py_DECREF(empty_tuple); |
1418 | |
1419 | Py_XINCREF(name); |
1420 | Py_XSETREF(self->name, name); |
1421 | |
1422 | Py_XINCREF(obj); |
1423 | Py_XSETREF(self->obj, obj); |
1424 | |
1425 | return 0; |
1426 | } |
1427 | |
1428 | static int |
1429 | AttributeError_clear(PyAttributeErrorObject *self) |
1430 | { |
1431 | Py_CLEAR(self->obj); |
1432 | Py_CLEAR(self->name); |
1433 | return BaseException_clear((PyBaseExceptionObject *)self); |
1434 | } |
1435 | |
1436 | static void |
1437 | AttributeError_dealloc(PyAttributeErrorObject *self) |
1438 | { |
1439 | _PyObject_GC_UNTRACK(self); |
1440 | AttributeError_clear(self); |
1441 | Py_TYPE(self)->tp_free((PyObject *)self); |
1442 | } |
1443 | |
1444 | static int |
1445 | AttributeError_traverse(PyAttributeErrorObject *self, visitproc visit, void *arg) |
1446 | { |
1447 | Py_VISIT(self->obj); |
1448 | Py_VISIT(self->name); |
1449 | return BaseException_traverse((PyBaseExceptionObject *)self, visit, arg); |
1450 | } |
1451 | |
1452 | static PyMemberDef AttributeError_members[] = { |
1453 | {"name" , T_OBJECT, offsetof(PyAttributeErrorObject, name), 0, PyDoc_STR("attribute name" )}, |
1454 | {"obj" , T_OBJECT, offsetof(PyAttributeErrorObject, obj), 0, PyDoc_STR("object" )}, |
1455 | {NULL} /* Sentinel */ |
1456 | }; |
1457 | |
1458 | static PyMethodDef AttributeError_methods[] = { |
1459 | {NULL} /* Sentinel */ |
1460 | }; |
1461 | |
1462 | ComplexExtendsException(PyExc_Exception, AttributeError, |
1463 | AttributeError, 0, |
1464 | AttributeError_methods, AttributeError_members, |
1465 | 0, BaseException_str, "Attribute not found." ); |
1466 | |
1467 | /* |
1468 | * SyntaxError extends Exception |
1469 | */ |
1470 | |
1471 | static int |
1472 | SyntaxError_init(PySyntaxErrorObject *self, PyObject *args, PyObject *kwds) |
1473 | { |
1474 | PyObject *info = NULL; |
1475 | Py_ssize_t lenargs = PyTuple_GET_SIZE(args); |
1476 | |
1477 | if (BaseException_init((PyBaseExceptionObject *)self, args, kwds) == -1) |
1478 | return -1; |
1479 | |
1480 | if (lenargs >= 1) { |
1481 | Py_INCREF(PyTuple_GET_ITEM(args, 0)); |
1482 | Py_XSETREF(self->msg, PyTuple_GET_ITEM(args, 0)); |
1483 | } |
1484 | if (lenargs == 2) { |
1485 | info = PyTuple_GET_ITEM(args, 1); |
1486 | info = PySequence_Tuple(info); |
1487 | if (!info) { |
1488 | return -1; |
1489 | } |
1490 | |
1491 | self->end_lineno = NULL; |
1492 | self->end_offset = NULL; |
1493 | if (!PyArg_ParseTuple(info, "OOOO|OO" , |
1494 | &self->filename, &self->lineno, |
1495 | &self->offset, &self->text, |
1496 | &self->end_lineno, &self->end_offset)) { |
1497 | Py_DECREF(info); |
1498 | return -1; |
1499 | } |
1500 | |
1501 | Py_INCREF(self->filename); |
1502 | Py_INCREF(self->lineno); |
1503 | Py_INCREF(self->offset); |
1504 | Py_INCREF(self->text); |
1505 | Py_XINCREF(self->end_lineno); |
1506 | Py_XINCREF(self->end_offset); |
1507 | Py_DECREF(info); |
1508 | |
1509 | if (self->end_lineno != NULL && self->end_offset == NULL) { |
1510 | PyErr_SetString(PyExc_TypeError, "end_offset must be provided when end_lineno is provided" ); |
1511 | return -1; |
1512 | } |
1513 | } |
1514 | return 0; |
1515 | } |
1516 | |
1517 | static int |
1518 | SyntaxError_clear(PySyntaxErrorObject *self) |
1519 | { |
1520 | Py_CLEAR(self->msg); |
1521 | Py_CLEAR(self->filename); |
1522 | Py_CLEAR(self->lineno); |
1523 | Py_CLEAR(self->offset); |
1524 | Py_CLEAR(self->end_lineno); |
1525 | Py_CLEAR(self->end_offset); |
1526 | Py_CLEAR(self->text); |
1527 | Py_CLEAR(self->print_file_and_line); |
1528 | return BaseException_clear((PyBaseExceptionObject *)self); |
1529 | } |
1530 | |
1531 | static void |
1532 | SyntaxError_dealloc(PySyntaxErrorObject *self) |
1533 | { |
1534 | _PyObject_GC_UNTRACK(self); |
1535 | SyntaxError_clear(self); |
1536 | Py_TYPE(self)->tp_free((PyObject *)self); |
1537 | } |
1538 | |
1539 | static int |
1540 | SyntaxError_traverse(PySyntaxErrorObject *self, visitproc visit, void *arg) |
1541 | { |
1542 | Py_VISIT(self->msg); |
1543 | Py_VISIT(self->filename); |
1544 | Py_VISIT(self->lineno); |
1545 | Py_VISIT(self->offset); |
1546 | Py_VISIT(self->end_lineno); |
1547 | Py_VISIT(self->end_offset); |
1548 | Py_VISIT(self->text); |
1549 | Py_VISIT(self->print_file_and_line); |
1550 | return BaseException_traverse((PyBaseExceptionObject *)self, visit, arg); |
1551 | } |
1552 | |
1553 | /* This is called "my_basename" instead of just "basename" to avoid name |
1554 | conflicts with glibc; basename is already prototyped if _GNU_SOURCE is |
1555 | defined, and Python does define that. */ |
1556 | static PyObject* |
1557 | my_basename(PyObject *name) |
1558 | { |
1559 | Py_ssize_t i, size, offset; |
1560 | int kind; |
1561 | const void *data; |
1562 | |
1563 | if (PyUnicode_READY(name)) |
1564 | return NULL; |
1565 | kind = PyUnicode_KIND(name); |
1566 | data = PyUnicode_DATA(name); |
1567 | size = PyUnicode_GET_LENGTH(name); |
1568 | offset = 0; |
1569 | for(i=0; i < size; i++) { |
1570 | if (PyUnicode_READ(kind, data, i) == SEP) { |
1571 | offset = i + 1; |
1572 | } |
1573 | } |
1574 | if (offset != 0) { |
1575 | return PyUnicode_Substring(name, offset, size); |
1576 | } |
1577 | else { |
1578 | Py_INCREF(name); |
1579 | return name; |
1580 | } |
1581 | } |
1582 | |
1583 | |
1584 | static PyObject * |
1585 | SyntaxError_str(PySyntaxErrorObject *self) |
1586 | { |
1587 | int have_lineno = 0; |
1588 | PyObject *filename; |
1589 | PyObject *result; |
1590 | /* Below, we always ignore overflow errors, just printing -1. |
1591 | Still, we cannot allow an OverflowError to be raised, so |
1592 | we need to call PyLong_AsLongAndOverflow. */ |
1593 | int overflow; |
1594 | |
1595 | /* XXX -- do all the additional formatting with filename and |
1596 | lineno here */ |
1597 | |
1598 | if (self->filename && PyUnicode_Check(self->filename)) { |
1599 | filename = my_basename(self->filename); |
1600 | if (filename == NULL) |
1601 | return NULL; |
1602 | } else { |
1603 | filename = NULL; |
1604 | } |
1605 | have_lineno = (self->lineno != NULL) && PyLong_CheckExact(self->lineno); |
1606 | |
1607 | if (!filename && !have_lineno) |
1608 | return PyObject_Str(self->msg ? self->msg : Py_None); |
1609 | |
1610 | if (filename && have_lineno) |
1611 | result = PyUnicode_FromFormat("%S (%U, line %ld)" , |
1612 | self->msg ? self->msg : Py_None, |
1613 | filename, |
1614 | PyLong_AsLongAndOverflow(self->lineno, &overflow)); |
1615 | else if (filename) |
1616 | result = PyUnicode_FromFormat("%S (%U)" , |
1617 | self->msg ? self->msg : Py_None, |
1618 | filename); |
1619 | else /* only have_lineno */ |
1620 | result = PyUnicode_FromFormat("%S (line %ld)" , |
1621 | self->msg ? self->msg : Py_None, |
1622 | PyLong_AsLongAndOverflow(self->lineno, &overflow)); |
1623 | Py_XDECREF(filename); |
1624 | return result; |
1625 | } |
1626 | |
1627 | static PyMemberDef SyntaxError_members[] = { |
1628 | {"msg" , T_OBJECT, offsetof(PySyntaxErrorObject, msg), 0, |
1629 | PyDoc_STR("exception msg" )}, |
1630 | {"filename" , T_OBJECT, offsetof(PySyntaxErrorObject, filename), 0, |
1631 | PyDoc_STR("exception filename" )}, |
1632 | {"lineno" , T_OBJECT, offsetof(PySyntaxErrorObject, lineno), 0, |
1633 | PyDoc_STR("exception lineno" )}, |
1634 | {"offset" , T_OBJECT, offsetof(PySyntaxErrorObject, offset), 0, |
1635 | PyDoc_STR("exception offset" )}, |
1636 | {"text" , T_OBJECT, offsetof(PySyntaxErrorObject, text), 0, |
1637 | PyDoc_STR("exception text" )}, |
1638 | {"end_lineno" , T_OBJECT, offsetof(PySyntaxErrorObject, end_lineno), 0, |
1639 | PyDoc_STR("exception end lineno" )}, |
1640 | {"end_offset" , T_OBJECT, offsetof(PySyntaxErrorObject, end_offset), 0, |
1641 | PyDoc_STR("exception end offset" )}, |
1642 | {"print_file_and_line" , T_OBJECT, |
1643 | offsetof(PySyntaxErrorObject, print_file_and_line), 0, |
1644 | PyDoc_STR("exception print_file_and_line" )}, |
1645 | {NULL} /* Sentinel */ |
1646 | }; |
1647 | |
1648 | ComplexExtendsException(PyExc_Exception, SyntaxError, SyntaxError, |
1649 | 0, 0, SyntaxError_members, 0, |
1650 | SyntaxError_str, "Invalid syntax." ); |
1651 | |
1652 | |
1653 | /* |
1654 | * IndentationError extends SyntaxError |
1655 | */ |
1656 | MiddlingExtendsException(PyExc_SyntaxError, IndentationError, SyntaxError, |
1657 | "Improper indentation." ); |
1658 | |
1659 | |
1660 | /* |
1661 | * TabError extends IndentationError |
1662 | */ |
1663 | MiddlingExtendsException(PyExc_IndentationError, TabError, SyntaxError, |
1664 | "Improper mixture of spaces and tabs." ); |
1665 | |
1666 | |
1667 | /* |
1668 | * LookupError extends Exception |
1669 | */ |
1670 | SimpleExtendsException(PyExc_Exception, LookupError, |
1671 | "Base class for lookup errors." ); |
1672 | |
1673 | |
1674 | /* |
1675 | * IndexError extends LookupError |
1676 | */ |
1677 | SimpleExtendsException(PyExc_LookupError, IndexError, |
1678 | "Sequence index out of range." ); |
1679 | |
1680 | |
1681 | /* |
1682 | * KeyError extends LookupError |
1683 | */ |
1684 | static PyObject * |
1685 | KeyError_str(PyBaseExceptionObject *self) |
1686 | { |
1687 | /* If args is a tuple of exactly one item, apply repr to args[0]. |
1688 | This is done so that e.g. the exception raised by {}[''] prints |
1689 | KeyError: '' |
1690 | rather than the confusing |
1691 | KeyError |
1692 | alone. The downside is that if KeyError is raised with an explanatory |
1693 | string, that string will be displayed in quotes. Too bad. |
1694 | If args is anything else, use the default BaseException__str__(). |
1695 | */ |
1696 | if (PyTuple_GET_SIZE(self->args) == 1) { |
1697 | return PyObject_Repr(PyTuple_GET_ITEM(self->args, 0)); |
1698 | } |
1699 | return BaseException_str(self); |
1700 | } |
1701 | |
1702 | ComplexExtendsException(PyExc_LookupError, KeyError, BaseException, |
1703 | 0, 0, 0, 0, KeyError_str, "Mapping key not found." ); |
1704 | |
1705 | |
1706 | /* |
1707 | * ValueError extends Exception |
1708 | */ |
1709 | SimpleExtendsException(PyExc_Exception, ValueError, |
1710 | "Inappropriate argument value (of correct type)." ); |
1711 | |
1712 | /* |
1713 | * UnicodeError extends ValueError |
1714 | */ |
1715 | |
1716 | SimpleExtendsException(PyExc_ValueError, UnicodeError, |
1717 | "Unicode related error." ); |
1718 | |
1719 | static PyObject * |
1720 | get_string(PyObject *attr, const char *name) |
1721 | { |
1722 | if (!attr) { |
1723 | PyErr_Format(PyExc_TypeError, "%.200s attribute not set" , name); |
1724 | return NULL; |
1725 | } |
1726 | |
1727 | if (!PyBytes_Check(attr)) { |
1728 | PyErr_Format(PyExc_TypeError, "%.200s attribute must be bytes" , name); |
1729 | return NULL; |
1730 | } |
1731 | Py_INCREF(attr); |
1732 | return attr; |
1733 | } |
1734 | |
1735 | static PyObject * |
1736 | get_unicode(PyObject *attr, const char *name) |
1737 | { |
1738 | if (!attr) { |
1739 | PyErr_Format(PyExc_TypeError, "%.200s attribute not set" , name); |
1740 | return NULL; |
1741 | } |
1742 | |
1743 | if (!PyUnicode_Check(attr)) { |
1744 | PyErr_Format(PyExc_TypeError, |
1745 | "%.200s attribute must be unicode" , name); |
1746 | return NULL; |
1747 | } |
1748 | Py_INCREF(attr); |
1749 | return attr; |
1750 | } |
1751 | |
1752 | static int |
1753 | set_unicodefromstring(PyObject **attr, const char *value) |
1754 | { |
1755 | PyObject *obj = PyUnicode_FromString(value); |
1756 | if (!obj) |
1757 | return -1; |
1758 | Py_XSETREF(*attr, obj); |
1759 | return 0; |
1760 | } |
1761 | |
1762 | PyObject * |
1763 | PyUnicodeEncodeError_GetEncoding(PyObject *exc) |
1764 | { |
1765 | return get_unicode(((PyUnicodeErrorObject *)exc)->encoding, "encoding" ); |
1766 | } |
1767 | |
1768 | PyObject * |
1769 | PyUnicodeDecodeError_GetEncoding(PyObject *exc) |
1770 | { |
1771 | return get_unicode(((PyUnicodeErrorObject *)exc)->encoding, "encoding" ); |
1772 | } |
1773 | |
1774 | PyObject * |
1775 | PyUnicodeEncodeError_GetObject(PyObject *exc) |
1776 | { |
1777 | return get_unicode(((PyUnicodeErrorObject *)exc)->object, "object" ); |
1778 | } |
1779 | |
1780 | PyObject * |
1781 | PyUnicodeDecodeError_GetObject(PyObject *exc) |
1782 | { |
1783 | return get_string(((PyUnicodeErrorObject *)exc)->object, "object" ); |
1784 | } |
1785 | |
1786 | PyObject * |
1787 | PyUnicodeTranslateError_GetObject(PyObject *exc) |
1788 | { |
1789 | return get_unicode(((PyUnicodeErrorObject *)exc)->object, "object" ); |
1790 | } |
1791 | |
1792 | int |
1793 | PyUnicodeEncodeError_GetStart(PyObject *exc, Py_ssize_t *start) |
1794 | { |
1795 | Py_ssize_t size; |
1796 | PyObject *obj = get_unicode(((PyUnicodeErrorObject *)exc)->object, |
1797 | "object" ); |
1798 | if (!obj) |
1799 | return -1; |
1800 | *start = ((PyUnicodeErrorObject *)exc)->start; |
1801 | size = PyUnicode_GET_LENGTH(obj); |
1802 | if (*start<0) |
1803 | *start = 0; /*XXX check for values <0*/ |
1804 | if (*start>=size) |
1805 | *start = size-1; |
1806 | Py_DECREF(obj); |
1807 | return 0; |
1808 | } |
1809 | |
1810 | |
1811 | int |
1812 | PyUnicodeDecodeError_GetStart(PyObject *exc, Py_ssize_t *start) |
1813 | { |
1814 | Py_ssize_t size; |
1815 | PyObject *obj = get_string(((PyUnicodeErrorObject *)exc)->object, "object" ); |
1816 | if (!obj) |
1817 | return -1; |
1818 | size = PyBytes_GET_SIZE(obj); |
1819 | *start = ((PyUnicodeErrorObject *)exc)->start; |
1820 | if (*start<0) |
1821 | *start = 0; |
1822 | if (*start>=size) |
1823 | *start = size-1; |
1824 | Py_DECREF(obj); |
1825 | return 0; |
1826 | } |
1827 | |
1828 | |
1829 | int |
1830 | PyUnicodeTranslateError_GetStart(PyObject *exc, Py_ssize_t *start) |
1831 | { |
1832 | return PyUnicodeEncodeError_GetStart(exc, start); |
1833 | } |
1834 | |
1835 | |
1836 | int |
1837 | PyUnicodeEncodeError_SetStart(PyObject *exc, Py_ssize_t start) |
1838 | { |
1839 | ((PyUnicodeErrorObject *)exc)->start = start; |
1840 | return 0; |
1841 | } |
1842 | |
1843 | |
1844 | int |
1845 | PyUnicodeDecodeError_SetStart(PyObject *exc, Py_ssize_t start) |
1846 | { |
1847 | ((PyUnicodeErrorObject *)exc)->start = start; |
1848 | return 0; |
1849 | } |
1850 | |
1851 | |
1852 | int |
1853 | PyUnicodeTranslateError_SetStart(PyObject *exc, Py_ssize_t start) |
1854 | { |
1855 | ((PyUnicodeErrorObject *)exc)->start = start; |
1856 | return 0; |
1857 | } |
1858 | |
1859 | |
1860 | int |
1861 | PyUnicodeEncodeError_GetEnd(PyObject *exc, Py_ssize_t *end) |
1862 | { |
1863 | Py_ssize_t size; |
1864 | PyObject *obj = get_unicode(((PyUnicodeErrorObject *)exc)->object, |
1865 | "object" ); |
1866 | if (!obj) |
1867 | return -1; |
1868 | *end = ((PyUnicodeErrorObject *)exc)->end; |
1869 | size = PyUnicode_GET_LENGTH(obj); |
1870 | if (*end<1) |
1871 | *end = 1; |
1872 | if (*end>size) |
1873 | *end = size; |
1874 | Py_DECREF(obj); |
1875 | return 0; |
1876 | } |
1877 | |
1878 | |
1879 | int |
1880 | PyUnicodeDecodeError_GetEnd(PyObject *exc, Py_ssize_t *end) |
1881 | { |
1882 | Py_ssize_t size; |
1883 | PyObject *obj = get_string(((PyUnicodeErrorObject *)exc)->object, "object" ); |
1884 | if (!obj) |
1885 | return -1; |
1886 | size = PyBytes_GET_SIZE(obj); |
1887 | *end = ((PyUnicodeErrorObject *)exc)->end; |
1888 | if (*end<1) |
1889 | *end = 1; |
1890 | if (*end>size) |
1891 | *end = size; |
1892 | Py_DECREF(obj); |
1893 | return 0; |
1894 | } |
1895 | |
1896 | |
1897 | int |
1898 | PyUnicodeTranslateError_GetEnd(PyObject *exc, Py_ssize_t *end) |
1899 | { |
1900 | return PyUnicodeEncodeError_GetEnd(exc, end); |
1901 | } |
1902 | |
1903 | |
1904 | int |
1905 | PyUnicodeEncodeError_SetEnd(PyObject *exc, Py_ssize_t end) |
1906 | { |
1907 | ((PyUnicodeErrorObject *)exc)->end = end; |
1908 | return 0; |
1909 | } |
1910 | |
1911 | |
1912 | int |
1913 | PyUnicodeDecodeError_SetEnd(PyObject *exc, Py_ssize_t end) |
1914 | { |
1915 | ((PyUnicodeErrorObject *)exc)->end = end; |
1916 | return 0; |
1917 | } |
1918 | |
1919 | |
1920 | int |
1921 | PyUnicodeTranslateError_SetEnd(PyObject *exc, Py_ssize_t end) |
1922 | { |
1923 | ((PyUnicodeErrorObject *)exc)->end = end; |
1924 | return 0; |
1925 | } |
1926 | |
1927 | PyObject * |
1928 | PyUnicodeEncodeError_GetReason(PyObject *exc) |
1929 | { |
1930 | return get_unicode(((PyUnicodeErrorObject *)exc)->reason, "reason" ); |
1931 | } |
1932 | |
1933 | |
1934 | PyObject * |
1935 | PyUnicodeDecodeError_GetReason(PyObject *exc) |
1936 | { |
1937 | return get_unicode(((PyUnicodeErrorObject *)exc)->reason, "reason" ); |
1938 | } |
1939 | |
1940 | |
1941 | PyObject * |
1942 | PyUnicodeTranslateError_GetReason(PyObject *exc) |
1943 | { |
1944 | return get_unicode(((PyUnicodeErrorObject *)exc)->reason, "reason" ); |
1945 | } |
1946 | |
1947 | |
1948 | int |
1949 | PyUnicodeEncodeError_SetReason(PyObject *exc, const char *reason) |
1950 | { |
1951 | return set_unicodefromstring(&((PyUnicodeErrorObject *)exc)->reason, |
1952 | reason); |
1953 | } |
1954 | |
1955 | |
1956 | int |
1957 | PyUnicodeDecodeError_SetReason(PyObject *exc, const char *reason) |
1958 | { |
1959 | return set_unicodefromstring(&((PyUnicodeErrorObject *)exc)->reason, |
1960 | reason); |
1961 | } |
1962 | |
1963 | |
1964 | int |
1965 | PyUnicodeTranslateError_SetReason(PyObject *exc, const char *reason) |
1966 | { |
1967 | return set_unicodefromstring(&((PyUnicodeErrorObject *)exc)->reason, |
1968 | reason); |
1969 | } |
1970 | |
1971 | |
1972 | static int |
1973 | UnicodeError_clear(PyUnicodeErrorObject *self) |
1974 | { |
1975 | Py_CLEAR(self->encoding); |
1976 | Py_CLEAR(self->object); |
1977 | Py_CLEAR(self->reason); |
1978 | return BaseException_clear((PyBaseExceptionObject *)self); |
1979 | } |
1980 | |
1981 | static void |
1982 | UnicodeError_dealloc(PyUnicodeErrorObject *self) |
1983 | { |
1984 | _PyObject_GC_UNTRACK(self); |
1985 | UnicodeError_clear(self); |
1986 | Py_TYPE(self)->tp_free((PyObject *)self); |
1987 | } |
1988 | |
1989 | static int |
1990 | UnicodeError_traverse(PyUnicodeErrorObject *self, visitproc visit, void *arg) |
1991 | { |
1992 | Py_VISIT(self->encoding); |
1993 | Py_VISIT(self->object); |
1994 | Py_VISIT(self->reason); |
1995 | return BaseException_traverse((PyBaseExceptionObject *)self, visit, arg); |
1996 | } |
1997 | |
1998 | static PyMemberDef UnicodeError_members[] = { |
1999 | {"encoding" , T_OBJECT, offsetof(PyUnicodeErrorObject, encoding), 0, |
2000 | PyDoc_STR("exception encoding" )}, |
2001 | {"object" , T_OBJECT, offsetof(PyUnicodeErrorObject, object), 0, |
2002 | PyDoc_STR("exception object" )}, |
2003 | {"start" , T_PYSSIZET, offsetof(PyUnicodeErrorObject, start), 0, |
2004 | PyDoc_STR("exception start" )}, |
2005 | {"end" , T_PYSSIZET, offsetof(PyUnicodeErrorObject, end), 0, |
2006 | PyDoc_STR("exception end" )}, |
2007 | {"reason" , T_OBJECT, offsetof(PyUnicodeErrorObject, reason), 0, |
2008 | PyDoc_STR("exception reason" )}, |
2009 | {NULL} /* Sentinel */ |
2010 | }; |
2011 | |
2012 | |
2013 | /* |
2014 | * UnicodeEncodeError extends UnicodeError |
2015 | */ |
2016 | |
2017 | static int |
2018 | UnicodeEncodeError_init(PyObject *self, PyObject *args, PyObject *kwds) |
2019 | { |
2020 | PyUnicodeErrorObject *err; |
2021 | |
2022 | if (BaseException_init((PyBaseExceptionObject *)self, args, kwds) == -1) |
2023 | return -1; |
2024 | |
2025 | err = (PyUnicodeErrorObject *)self; |
2026 | |
2027 | Py_CLEAR(err->encoding); |
2028 | Py_CLEAR(err->object); |
2029 | Py_CLEAR(err->reason); |
2030 | |
2031 | if (!PyArg_ParseTuple(args, "UUnnU" , |
2032 | &err->encoding, &err->object, |
2033 | &err->start, &err->end, &err->reason)) { |
2034 | err->encoding = err->object = err->reason = NULL; |
2035 | return -1; |
2036 | } |
2037 | |
2038 | Py_INCREF(err->encoding); |
2039 | Py_INCREF(err->object); |
2040 | Py_INCREF(err->reason); |
2041 | |
2042 | return 0; |
2043 | } |
2044 | |
2045 | static PyObject * |
2046 | UnicodeEncodeError_str(PyObject *self) |
2047 | { |
2048 | PyUnicodeErrorObject *uself = (PyUnicodeErrorObject *)self; |
2049 | PyObject *result = NULL; |
2050 | PyObject *reason_str = NULL; |
2051 | PyObject *encoding_str = NULL; |
2052 | |
2053 | if (!uself->object) |
2054 | /* Not properly initialized. */ |
2055 | return PyUnicode_FromString("" ); |
2056 | |
2057 | /* Get reason and encoding as strings, which they might not be if |
2058 | they've been modified after we were constructed. */ |
2059 | reason_str = PyObject_Str(uself->reason); |
2060 | if (reason_str == NULL) |
2061 | goto done; |
2062 | encoding_str = PyObject_Str(uself->encoding); |
2063 | if (encoding_str == NULL) |
2064 | goto done; |
2065 | |
2066 | if (uself->start < PyUnicode_GET_LENGTH(uself->object) && uself->end == uself->start+1) { |
2067 | Py_UCS4 badchar = PyUnicode_ReadChar(uself->object, uself->start); |
2068 | const char *fmt; |
2069 | if (badchar <= 0xff) |
2070 | fmt = "'%U' codec can't encode character '\\x%02x' in position %zd: %U" ; |
2071 | else if (badchar <= 0xffff) |
2072 | fmt = "'%U' codec can't encode character '\\u%04x' in position %zd: %U" ; |
2073 | else |
2074 | fmt = "'%U' codec can't encode character '\\U%08x' in position %zd: %U" ; |
2075 | result = PyUnicode_FromFormat( |
2076 | fmt, |
2077 | encoding_str, |
2078 | (int)badchar, |
2079 | uself->start, |
2080 | reason_str); |
2081 | } |
2082 | else { |
2083 | result = PyUnicode_FromFormat( |
2084 | "'%U' codec can't encode characters in position %zd-%zd: %U" , |
2085 | encoding_str, |
2086 | uself->start, |
2087 | uself->end-1, |
2088 | reason_str); |
2089 | } |
2090 | done: |
2091 | Py_XDECREF(reason_str); |
2092 | Py_XDECREF(encoding_str); |
2093 | return result; |
2094 | } |
2095 | |
2096 | static PyTypeObject _PyExc_UnicodeEncodeError = { |
2097 | PyVarObject_HEAD_INIT(NULL, 0) |
2098 | "UnicodeEncodeError" , |
2099 | sizeof(PyUnicodeErrorObject), 0, |
2100 | (destructor)UnicodeError_dealloc, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
2101 | (reprfunc)UnicodeEncodeError_str, 0, 0, 0, |
2102 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, |
2103 | PyDoc_STR("Unicode encoding error." ), (traverseproc)UnicodeError_traverse, |
2104 | (inquiry)UnicodeError_clear, 0, 0, 0, 0, 0, UnicodeError_members, |
2105 | 0, &_PyExc_UnicodeError, 0, 0, 0, offsetof(PyUnicodeErrorObject, dict), |
2106 | (initproc)UnicodeEncodeError_init, 0, BaseException_new, |
2107 | }; |
2108 | PyObject *PyExc_UnicodeEncodeError = (PyObject *)&_PyExc_UnicodeEncodeError; |
2109 | |
2110 | PyObject * |
2111 | PyUnicodeEncodeError_Create( |
2112 | const char *encoding, const Py_UNICODE *object, Py_ssize_t length, |
2113 | Py_ssize_t start, Py_ssize_t end, const char *reason) |
2114 | { |
2115 | return PyObject_CallFunction(PyExc_UnicodeEncodeError, "su#nns" , |
2116 | encoding, object, length, start, end, reason); |
2117 | } |
2118 | |
2119 | |
2120 | /* |
2121 | * UnicodeDecodeError extends UnicodeError |
2122 | */ |
2123 | |
2124 | static int |
2125 | UnicodeDecodeError_init(PyObject *self, PyObject *args, PyObject *kwds) |
2126 | { |
2127 | PyUnicodeErrorObject *ude; |
2128 | |
2129 | if (BaseException_init((PyBaseExceptionObject *)self, args, kwds) == -1) |
2130 | return -1; |
2131 | |
2132 | ude = (PyUnicodeErrorObject *)self; |
2133 | |
2134 | Py_CLEAR(ude->encoding); |
2135 | Py_CLEAR(ude->object); |
2136 | Py_CLEAR(ude->reason); |
2137 | |
2138 | if (!PyArg_ParseTuple(args, "UOnnU" , |
2139 | &ude->encoding, &ude->object, |
2140 | &ude->start, &ude->end, &ude->reason)) { |
2141 | ude->encoding = ude->object = ude->reason = NULL; |
2142 | return -1; |
2143 | } |
2144 | |
2145 | Py_INCREF(ude->encoding); |
2146 | Py_INCREF(ude->object); |
2147 | Py_INCREF(ude->reason); |
2148 | |
2149 | if (!PyBytes_Check(ude->object)) { |
2150 | Py_buffer view; |
2151 | if (PyObject_GetBuffer(ude->object, &view, PyBUF_SIMPLE) != 0) |
2152 | goto error; |
2153 | Py_XSETREF(ude->object, PyBytes_FromStringAndSize(view.buf, view.len)); |
2154 | PyBuffer_Release(&view); |
2155 | if (!ude->object) |
2156 | goto error; |
2157 | } |
2158 | return 0; |
2159 | |
2160 | error: |
2161 | Py_CLEAR(ude->encoding); |
2162 | Py_CLEAR(ude->object); |
2163 | Py_CLEAR(ude->reason); |
2164 | return -1; |
2165 | } |
2166 | |
2167 | static PyObject * |
2168 | UnicodeDecodeError_str(PyObject *self) |
2169 | { |
2170 | PyUnicodeErrorObject *uself = (PyUnicodeErrorObject *)self; |
2171 | PyObject *result = NULL; |
2172 | PyObject *reason_str = NULL; |
2173 | PyObject *encoding_str = NULL; |
2174 | |
2175 | if (!uself->object) |
2176 | /* Not properly initialized. */ |
2177 | return PyUnicode_FromString("" ); |
2178 | |
2179 | /* Get reason and encoding as strings, which they might not be if |
2180 | they've been modified after we were constructed. */ |
2181 | reason_str = PyObject_Str(uself->reason); |
2182 | if (reason_str == NULL) |
2183 | goto done; |
2184 | encoding_str = PyObject_Str(uself->encoding); |
2185 | if (encoding_str == NULL) |
2186 | goto done; |
2187 | |
2188 | if (uself->start < PyBytes_GET_SIZE(uself->object) && uself->end == uself->start+1) { |
2189 | int byte = (int)(PyBytes_AS_STRING(((PyUnicodeErrorObject *)self)->object)[uself->start]&0xff); |
2190 | result = PyUnicode_FromFormat( |
2191 | "'%U' codec can't decode byte 0x%02x in position %zd: %U" , |
2192 | encoding_str, |
2193 | byte, |
2194 | uself->start, |
2195 | reason_str); |
2196 | } |
2197 | else { |
2198 | result = PyUnicode_FromFormat( |
2199 | "'%U' codec can't decode bytes in position %zd-%zd: %U" , |
2200 | encoding_str, |
2201 | uself->start, |
2202 | uself->end-1, |
2203 | reason_str |
2204 | ); |
2205 | } |
2206 | done: |
2207 | Py_XDECREF(reason_str); |
2208 | Py_XDECREF(encoding_str); |
2209 | return result; |
2210 | } |
2211 | |
2212 | static PyTypeObject _PyExc_UnicodeDecodeError = { |
2213 | PyVarObject_HEAD_INIT(NULL, 0) |
2214 | "UnicodeDecodeError" , |
2215 | sizeof(PyUnicodeErrorObject), 0, |
2216 | (destructor)UnicodeError_dealloc, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
2217 | (reprfunc)UnicodeDecodeError_str, 0, 0, 0, |
2218 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, |
2219 | PyDoc_STR("Unicode decoding error." ), (traverseproc)UnicodeError_traverse, |
2220 | (inquiry)UnicodeError_clear, 0, 0, 0, 0, 0, UnicodeError_members, |
2221 | 0, &_PyExc_UnicodeError, 0, 0, 0, offsetof(PyUnicodeErrorObject, dict), |
2222 | (initproc)UnicodeDecodeError_init, 0, BaseException_new, |
2223 | }; |
2224 | PyObject *PyExc_UnicodeDecodeError = (PyObject *)&_PyExc_UnicodeDecodeError; |
2225 | |
2226 | PyObject * |
2227 | PyUnicodeDecodeError_Create( |
2228 | const char *encoding, const char *object, Py_ssize_t length, |
2229 | Py_ssize_t start, Py_ssize_t end, const char *reason) |
2230 | { |
2231 | return PyObject_CallFunction(PyExc_UnicodeDecodeError, "sy#nns" , |
2232 | encoding, object, length, start, end, reason); |
2233 | } |
2234 | |
2235 | |
2236 | /* |
2237 | * UnicodeTranslateError extends UnicodeError |
2238 | */ |
2239 | |
2240 | static int |
2241 | UnicodeTranslateError_init(PyUnicodeErrorObject *self, PyObject *args, |
2242 | PyObject *kwds) |
2243 | { |
2244 | if (BaseException_init((PyBaseExceptionObject *)self, args, kwds) == -1) |
2245 | return -1; |
2246 | |
2247 | Py_CLEAR(self->object); |
2248 | Py_CLEAR(self->reason); |
2249 | |
2250 | if (!PyArg_ParseTuple(args, "UnnU" , |
2251 | &self->object, |
2252 | &self->start, &self->end, &self->reason)) { |
2253 | self->object = self->reason = NULL; |
2254 | return -1; |
2255 | } |
2256 | |
2257 | Py_INCREF(self->object); |
2258 | Py_INCREF(self->reason); |
2259 | |
2260 | return 0; |
2261 | } |
2262 | |
2263 | |
2264 | static PyObject * |
2265 | UnicodeTranslateError_str(PyObject *self) |
2266 | { |
2267 | PyUnicodeErrorObject *uself = (PyUnicodeErrorObject *)self; |
2268 | PyObject *result = NULL; |
2269 | PyObject *reason_str = NULL; |
2270 | |
2271 | if (!uself->object) |
2272 | /* Not properly initialized. */ |
2273 | return PyUnicode_FromString("" ); |
2274 | |
2275 | /* Get reason as a string, which it might not be if it's been |
2276 | modified after we were constructed. */ |
2277 | reason_str = PyObject_Str(uself->reason); |
2278 | if (reason_str == NULL) |
2279 | goto done; |
2280 | |
2281 | if (uself->start < PyUnicode_GET_LENGTH(uself->object) && uself->end == uself->start+1) { |
2282 | Py_UCS4 badchar = PyUnicode_ReadChar(uself->object, uself->start); |
2283 | const char *fmt; |
2284 | if (badchar <= 0xff) |
2285 | fmt = "can't translate character '\\x%02x' in position %zd: %U" ; |
2286 | else if (badchar <= 0xffff) |
2287 | fmt = "can't translate character '\\u%04x' in position %zd: %U" ; |
2288 | else |
2289 | fmt = "can't translate character '\\U%08x' in position %zd: %U" ; |
2290 | result = PyUnicode_FromFormat( |
2291 | fmt, |
2292 | (int)badchar, |
2293 | uself->start, |
2294 | reason_str |
2295 | ); |
2296 | } else { |
2297 | result = PyUnicode_FromFormat( |
2298 | "can't translate characters in position %zd-%zd: %U" , |
2299 | uself->start, |
2300 | uself->end-1, |
2301 | reason_str |
2302 | ); |
2303 | } |
2304 | done: |
2305 | Py_XDECREF(reason_str); |
2306 | return result; |
2307 | } |
2308 | |
2309 | static PyTypeObject _PyExc_UnicodeTranslateError = { |
2310 | PyVarObject_HEAD_INIT(NULL, 0) |
2311 | "UnicodeTranslateError" , |
2312 | sizeof(PyUnicodeErrorObject), 0, |
2313 | (destructor)UnicodeError_dealloc, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
2314 | (reprfunc)UnicodeTranslateError_str, 0, 0, 0, |
2315 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, |
2316 | PyDoc_STR("Unicode translation error." ), (traverseproc)UnicodeError_traverse, |
2317 | (inquiry)UnicodeError_clear, 0, 0, 0, 0, 0, UnicodeError_members, |
2318 | 0, &_PyExc_UnicodeError, 0, 0, 0, offsetof(PyUnicodeErrorObject, dict), |
2319 | (initproc)UnicodeTranslateError_init, 0, BaseException_new, |
2320 | }; |
2321 | PyObject *PyExc_UnicodeTranslateError = (PyObject *)&_PyExc_UnicodeTranslateError; |
2322 | |
2323 | /* Deprecated. */ |
2324 | PyObject * |
2325 | PyUnicodeTranslateError_Create( |
2326 | const Py_UNICODE *object, Py_ssize_t length, |
2327 | Py_ssize_t start, Py_ssize_t end, const char *reason) |
2328 | { |
2329 | return PyObject_CallFunction(PyExc_UnicodeTranslateError, "u#nns" , |
2330 | object, length, start, end, reason); |
2331 | } |
2332 | |
2333 | PyObject * |
2334 | _PyUnicodeTranslateError_Create( |
2335 | PyObject *object, |
2336 | Py_ssize_t start, Py_ssize_t end, const char *reason) |
2337 | { |
2338 | return PyObject_CallFunction(PyExc_UnicodeTranslateError, "Onns" , |
2339 | object, start, end, reason); |
2340 | } |
2341 | |
2342 | /* |
2343 | * AssertionError extends Exception |
2344 | */ |
2345 | SimpleExtendsException(PyExc_Exception, AssertionError, |
2346 | "Assertion failed." ); |
2347 | |
2348 | |
2349 | /* |
2350 | * ArithmeticError extends Exception |
2351 | */ |
2352 | SimpleExtendsException(PyExc_Exception, ArithmeticError, |
2353 | "Base class for arithmetic errors." ); |
2354 | |
2355 | |
2356 | /* |
2357 | * FloatingPointError extends ArithmeticError |
2358 | */ |
2359 | SimpleExtendsException(PyExc_ArithmeticError, FloatingPointError, |
2360 | "Floating point operation failed." ); |
2361 | |
2362 | |
2363 | /* |
2364 | * OverflowError extends ArithmeticError |
2365 | */ |
2366 | SimpleExtendsException(PyExc_ArithmeticError, OverflowError, |
2367 | "Result too large to be represented." ); |
2368 | |
2369 | |
2370 | /* |
2371 | * ZeroDivisionError extends ArithmeticError |
2372 | */ |
2373 | SimpleExtendsException(PyExc_ArithmeticError, ZeroDivisionError, |
2374 | "Second argument to a division or modulo operation was zero." ); |
2375 | |
2376 | |
2377 | /* |
2378 | * SystemError extends Exception |
2379 | */ |
2380 | SimpleExtendsException(PyExc_Exception, SystemError, |
2381 | "Internal error in the Python interpreter.\n" |
2382 | "\n" |
2383 | "Please report this to the Python maintainer, along with the traceback,\n" |
2384 | "the Python version, and the hardware/OS platform and version." ); |
2385 | |
2386 | |
2387 | /* |
2388 | * ReferenceError extends Exception |
2389 | */ |
2390 | SimpleExtendsException(PyExc_Exception, ReferenceError, |
2391 | "Weak ref proxy used after referent went away." ); |
2392 | |
2393 | |
2394 | /* |
2395 | * MemoryError extends Exception |
2396 | */ |
2397 | |
2398 | #define MEMERRORS_SAVE 16 |
2399 | |
2400 | static PyObject * |
2401 | MemoryError_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
2402 | { |
2403 | PyBaseExceptionObject *self; |
2404 | |
2405 | /* If this is a subclass of MemoryError, don't use the freelist |
2406 | * and just return a fresh object */ |
2407 | if (type != (PyTypeObject *) PyExc_MemoryError) { |
2408 | return BaseException_new(type, args, kwds); |
2409 | } |
2410 | |
2411 | struct _Py_exc_state *state = get_exc_state(); |
2412 | if (state->memerrors_freelist == NULL) { |
2413 | return BaseException_new(type, args, kwds); |
2414 | } |
2415 | |
2416 | /* Fetch object from freelist and revive it */ |
2417 | self = state->memerrors_freelist; |
2418 | self->args = PyTuple_New(0); |
2419 | /* This shouldn't happen since the empty tuple is persistent */ |
2420 | if (self->args == NULL) { |
2421 | return NULL; |
2422 | } |
2423 | |
2424 | state->memerrors_freelist = (PyBaseExceptionObject *) self->dict; |
2425 | state->memerrors_numfree--; |
2426 | self->dict = NULL; |
2427 | _Py_NewReference((PyObject *)self); |
2428 | _PyObject_GC_TRACK(self); |
2429 | return (PyObject *)self; |
2430 | } |
2431 | |
2432 | static void |
2433 | MemoryError_dealloc(PyBaseExceptionObject *self) |
2434 | { |
2435 | BaseException_clear(self); |
2436 | |
2437 | /* If this is a subclass of MemoryError, we don't need to |
2438 | * do anything in the free-list*/ |
2439 | if (!Py_IS_TYPE(self, (PyTypeObject *) PyExc_MemoryError)) { |
2440 | Py_TYPE(self)->tp_free((PyObject *)self); |
2441 | return; |
2442 | } |
2443 | |
2444 | _PyObject_GC_UNTRACK(self); |
2445 | |
2446 | struct _Py_exc_state *state = get_exc_state(); |
2447 | if (state->memerrors_numfree >= MEMERRORS_SAVE) { |
2448 | Py_TYPE(self)->tp_free((PyObject *)self); |
2449 | } |
2450 | else { |
2451 | self->dict = (PyObject *) state->memerrors_freelist; |
2452 | state->memerrors_freelist = self; |
2453 | state->memerrors_numfree++; |
2454 | } |
2455 | } |
2456 | |
2457 | static int |
2458 | preallocate_memerrors(void) |
2459 | { |
2460 | /* We create enough MemoryErrors and then decref them, which will fill |
2461 | up the freelist. */ |
2462 | int i; |
2463 | PyObject *errors[MEMERRORS_SAVE]; |
2464 | for (i = 0; i < MEMERRORS_SAVE; i++) { |
2465 | errors[i] = MemoryError_new((PyTypeObject *) PyExc_MemoryError, |
2466 | NULL, NULL); |
2467 | if (!errors[i]) { |
2468 | return -1; |
2469 | } |
2470 | } |
2471 | for (i = 0; i < MEMERRORS_SAVE; i++) { |
2472 | Py_DECREF(errors[i]); |
2473 | } |
2474 | return 0; |
2475 | } |
2476 | |
2477 | static void |
2478 | free_preallocated_memerrors(struct _Py_exc_state *state) |
2479 | { |
2480 | while (state->memerrors_freelist != NULL) { |
2481 | PyObject *self = (PyObject *) state->memerrors_freelist; |
2482 | state->memerrors_freelist = (PyBaseExceptionObject *)state->memerrors_freelist->dict; |
2483 | Py_TYPE(self)->tp_free((PyObject *)self); |
2484 | } |
2485 | } |
2486 | |
2487 | |
2488 | static PyTypeObject _PyExc_MemoryError = { |
2489 | PyVarObject_HEAD_INIT(NULL, 0) |
2490 | "MemoryError" , |
2491 | sizeof(PyBaseExceptionObject), |
2492 | 0, (destructor)MemoryError_dealloc, 0, 0, 0, 0, 0, 0, 0, |
2493 | 0, 0, 0, 0, 0, 0, 0, |
2494 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, |
2495 | PyDoc_STR("Out of memory." ), (traverseproc)BaseException_traverse, |
2496 | (inquiry)BaseException_clear, 0, 0, 0, 0, 0, 0, 0, &_PyExc_Exception, |
2497 | 0, 0, 0, offsetof(PyBaseExceptionObject, dict), |
2498 | (initproc)BaseException_init, 0, MemoryError_new |
2499 | }; |
2500 | PyObject *PyExc_MemoryError = (PyObject *) &_PyExc_MemoryError; |
2501 | |
2502 | |
2503 | /* |
2504 | * BufferError extends Exception |
2505 | */ |
2506 | SimpleExtendsException(PyExc_Exception, BufferError, "Buffer error." ); |
2507 | |
2508 | |
2509 | /* Warning category docstrings */ |
2510 | |
2511 | /* |
2512 | * Warning extends Exception |
2513 | */ |
2514 | SimpleExtendsException(PyExc_Exception, Warning, |
2515 | "Base class for warning categories." ); |
2516 | |
2517 | |
2518 | /* |
2519 | * UserWarning extends Warning |
2520 | */ |
2521 | SimpleExtendsException(PyExc_Warning, UserWarning, |
2522 | "Base class for warnings generated by user code." ); |
2523 | |
2524 | |
2525 | /* |
2526 | * DeprecationWarning extends Warning |
2527 | */ |
2528 | SimpleExtendsException(PyExc_Warning, DeprecationWarning, |
2529 | "Base class for warnings about deprecated features." ); |
2530 | |
2531 | |
2532 | /* |
2533 | * PendingDeprecationWarning extends Warning |
2534 | */ |
2535 | SimpleExtendsException(PyExc_Warning, PendingDeprecationWarning, |
2536 | "Base class for warnings about features which will be deprecated\n" |
2537 | "in the future." ); |
2538 | |
2539 | |
2540 | /* |
2541 | * SyntaxWarning extends Warning |
2542 | */ |
2543 | SimpleExtendsException(PyExc_Warning, SyntaxWarning, |
2544 | "Base class for warnings about dubious syntax." ); |
2545 | |
2546 | |
2547 | /* |
2548 | * RuntimeWarning extends Warning |
2549 | */ |
2550 | SimpleExtendsException(PyExc_Warning, RuntimeWarning, |
2551 | "Base class for warnings about dubious runtime behavior." ); |
2552 | |
2553 | |
2554 | /* |
2555 | * FutureWarning extends Warning |
2556 | */ |
2557 | SimpleExtendsException(PyExc_Warning, FutureWarning, |
2558 | "Base class for warnings about constructs that will change semantically\n" |
2559 | "in the future." ); |
2560 | |
2561 | |
2562 | /* |
2563 | * ImportWarning extends Warning |
2564 | */ |
2565 | SimpleExtendsException(PyExc_Warning, ImportWarning, |
2566 | "Base class for warnings about probable mistakes in module imports" ); |
2567 | |
2568 | |
2569 | /* |
2570 | * UnicodeWarning extends Warning |
2571 | */ |
2572 | SimpleExtendsException(PyExc_Warning, UnicodeWarning, |
2573 | "Base class for warnings about Unicode related problems, mostly\n" |
2574 | "related to conversion problems." ); |
2575 | |
2576 | |
2577 | /* |
2578 | * BytesWarning extends Warning |
2579 | */ |
2580 | SimpleExtendsException(PyExc_Warning, BytesWarning, |
2581 | "Base class for warnings about bytes and buffer related problems, mostly\n" |
2582 | "related to conversion from str or comparing to str." ); |
2583 | |
2584 | |
2585 | /* |
2586 | * EncodingWarning extends Warning |
2587 | */ |
2588 | SimpleExtendsException(PyExc_Warning, EncodingWarning, |
2589 | "Base class for warnings about encodings." ); |
2590 | |
2591 | |
2592 | /* |
2593 | * ResourceWarning extends Warning |
2594 | */ |
2595 | SimpleExtendsException(PyExc_Warning, ResourceWarning, |
2596 | "Base class for warnings about resource usage." ); |
2597 | |
2598 | |
2599 | |
2600 | #ifdef MS_WINDOWS |
2601 | #include <winsock2.h> |
2602 | /* The following constants were added to errno.h in VS2010 but have |
2603 | preferred WSA equivalents. */ |
2604 | #undef EADDRINUSE |
2605 | #undef EADDRNOTAVAIL |
2606 | #undef EAFNOSUPPORT |
2607 | #undef EALREADY |
2608 | #undef ECONNABORTED |
2609 | #undef ECONNREFUSED |
2610 | #undef ECONNRESET |
2611 | #undef EDESTADDRREQ |
2612 | #undef EHOSTUNREACH |
2613 | #undef EINPROGRESS |
2614 | #undef EISCONN |
2615 | #undef ELOOP |
2616 | #undef EMSGSIZE |
2617 | #undef ENETDOWN |
2618 | #undef ENETRESET |
2619 | #undef ENETUNREACH |
2620 | #undef ENOBUFS |
2621 | #undef ENOPROTOOPT |
2622 | #undef ENOTCONN |
2623 | #undef ENOTSOCK |
2624 | #undef EOPNOTSUPP |
2625 | #undef EPROTONOSUPPORT |
2626 | #undef EPROTOTYPE |
2627 | #undef ETIMEDOUT |
2628 | #undef EWOULDBLOCK |
2629 | |
2630 | #if defined(WSAEALREADY) && !defined(EALREADY) |
2631 | #define EALREADY WSAEALREADY |
2632 | #endif |
2633 | #if defined(WSAECONNABORTED) && !defined(ECONNABORTED) |
2634 | #define ECONNABORTED WSAECONNABORTED |
2635 | #endif |
2636 | #if defined(WSAECONNREFUSED) && !defined(ECONNREFUSED) |
2637 | #define ECONNREFUSED WSAECONNREFUSED |
2638 | #endif |
2639 | #if defined(WSAECONNRESET) && !defined(ECONNRESET) |
2640 | #define ECONNRESET WSAECONNRESET |
2641 | #endif |
2642 | #if defined(WSAEINPROGRESS) && !defined(EINPROGRESS) |
2643 | #define EINPROGRESS WSAEINPROGRESS |
2644 | #endif |
2645 | #if defined(WSAESHUTDOWN) && !defined(ESHUTDOWN) |
2646 | #define ESHUTDOWN WSAESHUTDOWN |
2647 | #endif |
2648 | #if defined(WSAETIMEDOUT) && !defined(ETIMEDOUT) |
2649 | #define ETIMEDOUT WSAETIMEDOUT |
2650 | #endif |
2651 | #if defined(WSAEWOULDBLOCK) && !defined(EWOULDBLOCK) |
2652 | #define EWOULDBLOCK WSAEWOULDBLOCK |
2653 | #endif |
2654 | #endif /* MS_WINDOWS */ |
2655 | |
2656 | PyStatus |
2657 | _PyExc_Init(PyInterpreterState *interp) |
2658 | { |
2659 | struct _Py_exc_state *state = &interp->exc_state; |
2660 | |
2661 | #define PRE_INIT(TYPE) \ |
2662 | if (!(_PyExc_ ## TYPE.tp_flags & Py_TPFLAGS_READY)) { \ |
2663 | if (PyType_Ready(&_PyExc_ ## TYPE) < 0) { \ |
2664 | return _PyStatus_ERR("exceptions bootstrapping error."); \ |
2665 | } \ |
2666 | Py_INCREF(PyExc_ ## TYPE); \ |
2667 | } |
2668 | |
2669 | #define ADD_ERRNO(TYPE, CODE) \ |
2670 | do { \ |
2671 | PyObject *_code = PyLong_FromLong(CODE); \ |
2672 | assert(_PyObject_RealIsSubclass(PyExc_ ## TYPE, PyExc_OSError)); \ |
2673 | if (!_code || PyDict_SetItem(state->errnomap, _code, PyExc_ ## TYPE)) { \ |
2674 | Py_XDECREF(_code); \ |
2675 | return _PyStatus_ERR("errmap insertion problem."); \ |
2676 | } \ |
2677 | Py_DECREF(_code); \ |
2678 | } while (0) |
2679 | |
2680 | PRE_INIT(BaseException); |
2681 | PRE_INIT(Exception); |
2682 | PRE_INIT(TypeError); |
2683 | PRE_INIT(StopAsyncIteration); |
2684 | PRE_INIT(StopIteration); |
2685 | PRE_INIT(GeneratorExit); |
2686 | PRE_INIT(SystemExit); |
2687 | PRE_INIT(KeyboardInterrupt); |
2688 | PRE_INIT(ImportError); |
2689 | PRE_INIT(ModuleNotFoundError); |
2690 | PRE_INIT(OSError); |
2691 | PRE_INIT(EOFError); |
2692 | PRE_INIT(RuntimeError); |
2693 | PRE_INIT(RecursionError); |
2694 | PRE_INIT(NotImplementedError); |
2695 | PRE_INIT(NameError); |
2696 | PRE_INIT(UnboundLocalError); |
2697 | PRE_INIT(AttributeError); |
2698 | PRE_INIT(SyntaxError); |
2699 | PRE_INIT(IndentationError); |
2700 | PRE_INIT(TabError); |
2701 | PRE_INIT(LookupError); |
2702 | PRE_INIT(IndexError); |
2703 | PRE_INIT(KeyError); |
2704 | PRE_INIT(ValueError); |
2705 | PRE_INIT(UnicodeError); |
2706 | PRE_INIT(UnicodeEncodeError); |
2707 | PRE_INIT(UnicodeDecodeError); |
2708 | PRE_INIT(UnicodeTranslateError); |
2709 | PRE_INIT(AssertionError); |
2710 | PRE_INIT(ArithmeticError); |
2711 | PRE_INIT(FloatingPointError); |
2712 | PRE_INIT(OverflowError); |
2713 | PRE_INIT(ZeroDivisionError); |
2714 | PRE_INIT(SystemError); |
2715 | PRE_INIT(ReferenceError); |
2716 | PRE_INIT(MemoryError); |
2717 | PRE_INIT(BufferError); |
2718 | PRE_INIT(Warning); |
2719 | PRE_INIT(UserWarning); |
2720 | PRE_INIT(EncodingWarning); |
2721 | PRE_INIT(DeprecationWarning); |
2722 | PRE_INIT(PendingDeprecationWarning); |
2723 | PRE_INIT(SyntaxWarning); |
2724 | PRE_INIT(RuntimeWarning); |
2725 | PRE_INIT(FutureWarning); |
2726 | PRE_INIT(ImportWarning); |
2727 | PRE_INIT(UnicodeWarning); |
2728 | PRE_INIT(BytesWarning); |
2729 | PRE_INIT(ResourceWarning); |
2730 | |
2731 | /* OSError subclasses */ |
2732 | PRE_INIT(ConnectionError); |
2733 | |
2734 | PRE_INIT(BlockingIOError); |
2735 | PRE_INIT(BrokenPipeError); |
2736 | PRE_INIT(ChildProcessError); |
2737 | PRE_INIT(ConnectionAbortedError); |
2738 | PRE_INIT(ConnectionRefusedError); |
2739 | PRE_INIT(ConnectionResetError); |
2740 | PRE_INIT(FileExistsError); |
2741 | PRE_INIT(FileNotFoundError); |
2742 | PRE_INIT(IsADirectoryError); |
2743 | PRE_INIT(NotADirectoryError); |
2744 | PRE_INIT(InterruptedError); |
2745 | PRE_INIT(PermissionError); |
2746 | PRE_INIT(ProcessLookupError); |
2747 | PRE_INIT(TimeoutError); |
2748 | |
2749 | if (preallocate_memerrors() < 0) { |
2750 | return _PyStatus_NO_MEMORY(); |
2751 | } |
2752 | |
2753 | /* Add exceptions to errnomap */ |
2754 | assert(state->errnomap == NULL); |
2755 | state->errnomap = PyDict_New(); |
2756 | if (!state->errnomap) { |
2757 | return _PyStatus_NO_MEMORY(); |
2758 | } |
2759 | |
2760 | ADD_ERRNO(BlockingIOError, EAGAIN); |
2761 | ADD_ERRNO(BlockingIOError, EALREADY); |
2762 | ADD_ERRNO(BlockingIOError, EINPROGRESS); |
2763 | ADD_ERRNO(BlockingIOError, EWOULDBLOCK); |
2764 | ADD_ERRNO(BrokenPipeError, EPIPE); |
2765 | #ifdef ESHUTDOWN |
2766 | ADD_ERRNO(BrokenPipeError, ESHUTDOWN); |
2767 | #endif |
2768 | ADD_ERRNO(ChildProcessError, ECHILD); |
2769 | ADD_ERRNO(ConnectionAbortedError, ECONNABORTED); |
2770 | ADD_ERRNO(ConnectionRefusedError, ECONNREFUSED); |
2771 | ADD_ERRNO(ConnectionResetError, ECONNRESET); |
2772 | ADD_ERRNO(FileExistsError, EEXIST); |
2773 | ADD_ERRNO(FileNotFoundError, ENOENT); |
2774 | ADD_ERRNO(IsADirectoryError, EISDIR); |
2775 | ADD_ERRNO(NotADirectoryError, ENOTDIR); |
2776 | ADD_ERRNO(InterruptedError, EINTR); |
2777 | ADD_ERRNO(PermissionError, EACCES); |
2778 | ADD_ERRNO(PermissionError, EPERM); |
2779 | ADD_ERRNO(ProcessLookupError, ESRCH); |
2780 | ADD_ERRNO(TimeoutError, ETIMEDOUT); |
2781 | |
2782 | return _PyStatus_OK(); |
2783 | |
2784 | #undef PRE_INIT |
2785 | #undef ADD_ERRNO |
2786 | } |
2787 | |
2788 | |
2789 | /* Add exception types to the builtins module */ |
2790 | PyStatus |
2791 | _PyBuiltins_AddExceptions(PyObject *bltinmod) |
2792 | { |
2793 | #define POST_INIT(TYPE) \ |
2794 | if (PyDict_SetItemString(bdict, # TYPE, PyExc_ ## TYPE)) { \ |
2795 | return _PyStatus_ERR("Module dictionary insertion problem."); \ |
2796 | } |
2797 | |
2798 | #define INIT_ALIAS(NAME, TYPE) \ |
2799 | do { \ |
2800 | Py_INCREF(PyExc_ ## TYPE); \ |
2801 | Py_XDECREF(PyExc_ ## NAME); \ |
2802 | PyExc_ ## NAME = PyExc_ ## TYPE; \ |
2803 | if (PyDict_SetItemString(bdict, # NAME, PyExc_ ## NAME)) { \ |
2804 | return _PyStatus_ERR("Module dictionary insertion problem."); \ |
2805 | } \ |
2806 | } while (0) |
2807 | |
2808 | PyObject *bdict; |
2809 | |
2810 | bdict = PyModule_GetDict(bltinmod); |
2811 | if (bdict == NULL) { |
2812 | return _PyStatus_ERR("exceptions bootstrapping error." ); |
2813 | } |
2814 | |
2815 | POST_INIT(BaseException); |
2816 | POST_INIT(Exception); |
2817 | POST_INIT(TypeError); |
2818 | POST_INIT(StopAsyncIteration); |
2819 | POST_INIT(StopIteration); |
2820 | POST_INIT(GeneratorExit); |
2821 | POST_INIT(SystemExit); |
2822 | POST_INIT(KeyboardInterrupt); |
2823 | POST_INIT(ImportError); |
2824 | POST_INIT(ModuleNotFoundError); |
2825 | POST_INIT(OSError); |
2826 | INIT_ALIAS(EnvironmentError, OSError); |
2827 | INIT_ALIAS(IOError, OSError); |
2828 | #ifdef MS_WINDOWS |
2829 | INIT_ALIAS(WindowsError, OSError); |
2830 | #endif |
2831 | POST_INIT(EOFError); |
2832 | POST_INIT(RuntimeError); |
2833 | POST_INIT(RecursionError); |
2834 | POST_INIT(NotImplementedError); |
2835 | POST_INIT(NameError); |
2836 | POST_INIT(UnboundLocalError); |
2837 | POST_INIT(AttributeError); |
2838 | POST_INIT(SyntaxError); |
2839 | POST_INIT(IndentationError); |
2840 | POST_INIT(TabError); |
2841 | POST_INIT(LookupError); |
2842 | POST_INIT(IndexError); |
2843 | POST_INIT(KeyError); |
2844 | POST_INIT(ValueError); |
2845 | POST_INIT(UnicodeError); |
2846 | POST_INIT(UnicodeEncodeError); |
2847 | POST_INIT(UnicodeDecodeError); |
2848 | POST_INIT(UnicodeTranslateError); |
2849 | POST_INIT(AssertionError); |
2850 | POST_INIT(ArithmeticError); |
2851 | POST_INIT(FloatingPointError); |
2852 | POST_INIT(OverflowError); |
2853 | POST_INIT(ZeroDivisionError); |
2854 | POST_INIT(SystemError); |
2855 | POST_INIT(ReferenceError); |
2856 | POST_INIT(MemoryError); |
2857 | POST_INIT(BufferError); |
2858 | POST_INIT(Warning); |
2859 | POST_INIT(UserWarning); |
2860 | POST_INIT(EncodingWarning); |
2861 | POST_INIT(DeprecationWarning); |
2862 | POST_INIT(PendingDeprecationWarning); |
2863 | POST_INIT(SyntaxWarning); |
2864 | POST_INIT(RuntimeWarning); |
2865 | POST_INIT(FutureWarning); |
2866 | POST_INIT(ImportWarning); |
2867 | POST_INIT(UnicodeWarning); |
2868 | POST_INIT(BytesWarning); |
2869 | POST_INIT(ResourceWarning); |
2870 | |
2871 | /* OSError subclasses */ |
2872 | POST_INIT(ConnectionError); |
2873 | |
2874 | POST_INIT(BlockingIOError); |
2875 | POST_INIT(BrokenPipeError); |
2876 | POST_INIT(ChildProcessError); |
2877 | POST_INIT(ConnectionAbortedError); |
2878 | POST_INIT(ConnectionRefusedError); |
2879 | POST_INIT(ConnectionResetError); |
2880 | POST_INIT(FileExistsError); |
2881 | POST_INIT(FileNotFoundError); |
2882 | POST_INIT(IsADirectoryError); |
2883 | POST_INIT(NotADirectoryError); |
2884 | POST_INIT(InterruptedError); |
2885 | POST_INIT(PermissionError); |
2886 | POST_INIT(ProcessLookupError); |
2887 | POST_INIT(TimeoutError); |
2888 | |
2889 | return _PyStatus_OK(); |
2890 | |
2891 | #undef POST_INIT |
2892 | #undef INIT_ALIAS |
2893 | } |
2894 | |
2895 | void |
2896 | _PyExc_Fini(PyInterpreterState *interp) |
2897 | { |
2898 | struct _Py_exc_state *state = &interp->exc_state; |
2899 | free_preallocated_memerrors(state); |
2900 | Py_CLEAR(state->errnomap); |
2901 | } |
2902 | |
2903 | /* Helper to do the equivalent of "raise X from Y" in C, but always using |
2904 | * the current exception rather than passing one in. |
2905 | * |
2906 | * We currently limit this to *only* exceptions that use the BaseException |
2907 | * tp_init and tp_new methods, since we can be reasonably sure we can wrap |
2908 | * those correctly without losing data and without losing backwards |
2909 | * compatibility. |
2910 | * |
2911 | * We also aim to rule out *all* exceptions that might be storing additional |
2912 | * state, whether by having a size difference relative to BaseException, |
2913 | * additional arguments passed in during construction or by having a |
2914 | * non-empty instance dict. |
2915 | * |
2916 | * We need to be very careful with what we wrap, since changing types to |
2917 | * a broader exception type would be backwards incompatible for |
2918 | * existing codecs, and with different init or new method implementations |
2919 | * may either not support instantiation with PyErr_Format or lose |
2920 | * information when instantiated that way. |
2921 | * |
2922 | * XXX (ncoghlan): This could be made more comprehensive by exploiting the |
2923 | * fact that exceptions are expected to support pickling. If more builtin |
2924 | * exceptions (e.g. AttributeError) start to be converted to rich |
2925 | * exceptions with additional attributes, that's probably a better approach |
2926 | * to pursue over adding special cases for particular stateful subclasses. |
2927 | * |
2928 | * Returns a borrowed reference to the new exception (if any), NULL if the |
2929 | * existing exception was left in place. |
2930 | */ |
2931 | PyObject * |
2932 | _PyErr_TrySetFromCause(const char *format, ...) |
2933 | { |
2934 | PyObject* msg_prefix; |
2935 | PyObject *exc, *val, *tb; |
2936 | PyTypeObject *caught_type; |
2937 | PyObject **dictptr; |
2938 | PyObject *instance_args; |
2939 | Py_ssize_t num_args, caught_type_size, base_exc_size; |
2940 | PyObject *new_exc, *new_val, *new_tb; |
2941 | va_list vargs; |
2942 | int same_basic_size; |
2943 | |
2944 | PyErr_Fetch(&exc, &val, &tb); |
2945 | caught_type = (PyTypeObject *)exc; |
2946 | /* Ensure type info indicates no extra state is stored at the C level |
2947 | * and that the type can be reinstantiated using PyErr_Format |
2948 | */ |
2949 | caught_type_size = caught_type->tp_basicsize; |
2950 | base_exc_size = _PyExc_BaseException.tp_basicsize; |
2951 | same_basic_size = ( |
2952 | caught_type_size == base_exc_size || |
2953 | (PyType_SUPPORTS_WEAKREFS(caught_type) && |
2954 | (caught_type_size == base_exc_size + (Py_ssize_t)sizeof(PyObject *)) |
2955 | ) |
2956 | ); |
2957 | if (caught_type->tp_init != (initproc)BaseException_init || |
2958 | caught_type->tp_new != BaseException_new || |
2959 | !same_basic_size || |
2960 | caught_type->tp_itemsize != _PyExc_BaseException.tp_itemsize) { |
2961 | /* We can't be sure we can wrap this safely, since it may contain |
2962 | * more state than just the exception type. Accordingly, we just |
2963 | * leave it alone. |
2964 | */ |
2965 | PyErr_Restore(exc, val, tb); |
2966 | return NULL; |
2967 | } |
2968 | |
2969 | /* Check the args are empty or contain a single string */ |
2970 | PyErr_NormalizeException(&exc, &val, &tb); |
2971 | instance_args = ((PyBaseExceptionObject *)val)->args; |
2972 | num_args = PyTuple_GET_SIZE(instance_args); |
2973 | if (num_args > 1 || |
2974 | (num_args == 1 && |
2975 | !PyUnicode_CheckExact(PyTuple_GET_ITEM(instance_args, 0)))) { |
2976 | /* More than 1 arg, or the one arg we do have isn't a string |
2977 | */ |
2978 | PyErr_Restore(exc, val, tb); |
2979 | return NULL; |
2980 | } |
2981 | |
2982 | /* Ensure the instance dict is also empty */ |
2983 | dictptr = _PyObject_GetDictPtr(val); |
2984 | if (dictptr != NULL && *dictptr != NULL && |
2985 | PyDict_GET_SIZE(*dictptr) > 0) { |
2986 | /* While we could potentially copy a non-empty instance dictionary |
2987 | * to the replacement exception, for now we take the more |
2988 | * conservative path of leaving exceptions with attributes set |
2989 | * alone. |
2990 | */ |
2991 | PyErr_Restore(exc, val, tb); |
2992 | return NULL; |
2993 | } |
2994 | |
2995 | /* For exceptions that we can wrap safely, we chain the original |
2996 | * exception to a new one of the exact same type with an |
2997 | * error message that mentions the additional details and the |
2998 | * original exception. |
2999 | * |
3000 | * It would be nice to wrap OSError and various other exception |
3001 | * types as well, but that's quite a bit trickier due to the extra |
3002 | * state potentially stored on OSError instances. |
3003 | */ |
3004 | /* Ensure the traceback is set correctly on the existing exception */ |
3005 | if (tb != NULL) { |
3006 | PyException_SetTraceback(val, tb); |
3007 | Py_DECREF(tb); |
3008 | } |
3009 | |
3010 | #ifdef HAVE_STDARG_PROTOTYPES |
3011 | va_start(vargs, format); |
3012 | #else |
3013 | va_start(vargs); |
3014 | #endif |
3015 | msg_prefix = PyUnicode_FromFormatV(format, vargs); |
3016 | va_end(vargs); |
3017 | if (msg_prefix == NULL) { |
3018 | Py_DECREF(exc); |
3019 | Py_DECREF(val); |
3020 | return NULL; |
3021 | } |
3022 | |
3023 | PyErr_Format(exc, "%U (%s: %S)" , |
3024 | msg_prefix, Py_TYPE(val)->tp_name, val); |
3025 | Py_DECREF(exc); |
3026 | Py_DECREF(msg_prefix); |
3027 | PyErr_Fetch(&new_exc, &new_val, &new_tb); |
3028 | PyErr_NormalizeException(&new_exc, &new_val, &new_tb); |
3029 | PyException_SetCause(new_val, val); |
3030 | PyErr_Restore(new_exc, new_val, new_tb); |
3031 | return new_val; |
3032 | } |
3033 | |