Objects/exceptions.c

   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 "structmember.h"
  10 #include "osdefs.h"
  11
  12 #define MAKE_IT_NONE(x) (x) = Py_None; Py_INCREF(Py_None);
  13 #define EXC_MODULE_NAME "exceptions."
  14
  15 /* NOTE: If the exception class hierarchy changes, don't forget to update
  16  * Lib/test/exception_hierarchy.txt
  17  */
  18
  19 PyDoc_STRVAR(exceptions_doc, "Python's standard exception class hierarchy.\n\
  20 \n\
  21 Exceptions found here are defined both in the exceptions module and the\n\
  22 built-in namespace.  It is recommended that user-defined exceptions\n\
  23 inherit from Exception.  See the documentation for the exception\n\
  24 inheritance hierarchy.\n\
  25 ");
  26
  27 /*
  28  *    BaseException
  29  */
  30 static PyObject *
  31 BaseException_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
  32 {
  33     PyBaseExceptionObject *self;
  34
  35     self = (PyBaseExceptionObject *)type->tp_alloc(type, 0);
  36     if (!self)
  37         return NULL;
  38     /* the dict is created on the fly in PyObject_GenericSetAttr */
  39     self->message = self->dict = NULL;
  40
  41     self->args = PyTuple_New(0);
  42     if (!self->args) {
  43         Py_DECREF(self);
  44         return NULL;
  45     }
  46
  47     self->message = PyString_FromString("");
  48     if (!self->message) {
  49         Py_DECREF(self);
  50         return NULL;
  51     }
  52
  53     return (PyObject *)self;
  54 }
  55
  56 static int
  57 BaseException_init(PyBaseExceptionObject *self, PyObject *args, PyObject *kwds)
  58 {
  59     if (!_PyArg_NoKeywords(Py_TYPE(self)->tp_name, kwds))
  60         return -1;
  61
  62     Py_DECREF(self->args);
  63     self->args = args;
  64     Py_INCREF(self->args);
  65
  66     if (PyTuple_GET_SIZE(self->args) == 1) {
  67         Py_CLEAR(self->message);
  68         self->message = PyTuple_GET_ITEM(self->args, 0);
  69         Py_INCREF(self->message);
  70     }
  71     return 0;
  72 }
  73
  74 static int
  75 BaseException_clear(PyBaseExceptionObject *self)
  76 {
  77     Py_CLEAR(self->dict);
  78     Py_CLEAR(self->args);
  79     Py_CLEAR(self->message);
  80     return 0;
  81 }
  82
  83 static void
  84 BaseException_dealloc(PyBaseExceptionObject *self)
  85 {
  86     _PyObject_GC_UNTRACK(self);
  87     BaseException_clear(self);
  88     Py_TYPE(self)->tp_free((PyObject *)self);
  89 }
  90
  91 static int
  92 BaseException_traverse(PyBaseExceptionObject *self, visitproc visit, void *arg)
  93 {
  94     Py_VISIT(self->dict);
  95     Py_VISIT(self->args);
  96     Py_VISIT(self->message);
  97     return 0;
  98 }
  99
 100 static PyObject *
 101 BaseException_str(PyBaseExceptionObject *self)
 102 {
 103     PyObject *out;
 104
 105     switch (PyTuple_GET_SIZE(self->args)) {
 106     case 0:
 107         out = PyString_FromString("");
 108         break;
 109     case 1:
 110         out = PyObject_Str(PyTuple_GET_ITEM(self->args, 0));
 111         break;
 112     default:
 113         out = PyObject_Str(self->args);
 114         break;
 115     }
 116
 117     return out;
 118 }
 119
 120 #ifdef Py_USING_UNICODE
 121 static PyObject *
 122 BaseException_unicode(PyBaseExceptionObject *self)
 123 {
 124     PyObject *out;
 125
 126     switch (PyTuple_GET_SIZE(self->args)) {
 127     case 0:
 128         out = PyUnicode_FromString("");
 129         break;
 130     case 1:
 131         out = PyObject_Unicode(PyTuple_GET_ITEM(self->args, 0));
 132         break;
 133     default:
 134         out = PyObject_Unicode(self->args);
 135         break;
 136     }
 137
 138     return out;
 139 }
 140 #endif
 141
 142 static PyObject *
 143 BaseException_repr(PyBaseExceptionObject *self)
 144 {
 145     PyObject *repr_suffix;
 146     PyObject *repr;
 147     char *name;
 148     char *dot;
 149
 150     repr_suffix = PyObject_Repr(self->args);
 151     if (!repr_suffix)
 152         return NULL;
 153
 154     name = (char *)Py_TYPE(self)->tp_name;
 155     dot = strrchr(name, '.');
 156     if (dot != NULL) name = dot+1;
 157
 158     repr = PyString_FromString(name);
 159     if (!repr) {
 160         Py_DECREF(repr_suffix);
 161         return NULL;
 162     }
 163
 164     PyString_ConcatAndDel(&repr, repr_suffix);
 165     return repr;
 166 }
 167
 168 /* Pickling support */
 169 static PyObject *
 170 BaseException_reduce(PyBaseExceptionObject *self)
 171 {
 172     if (self->args && self->dict)
 173         return PyTuple_Pack(3, Py_TYPE(self), self->args, self->dict);
 174     else
 175         return PyTuple_Pack(2, Py_TYPE(self), self->args);
 176 }
 177
 178 /*
 179  * Needed for backward compatibility, since exceptions used to store
 180  * all their attributes in the __dict__. Code is taken from cPickle's
 181  * load_build function.
 182  */
 183 static PyObject *
 184 BaseException_setstate(PyObject *self, PyObject *state)
 185 {
 186     PyObject *d_key, *d_value;
 187     Py_ssize_t i = 0;
 188
 189     if (state != Py_None) {
 190         if (!PyDict_Check(state)) {
 191             PyErr_SetString(PyExc_TypeError, "state is not a dictionary");
 192             return NULL;
 193         }
 194         while (PyDict_Next(state, &i, &d_key, &d_value)) {
 195             if (PyObject_SetAttr(self, d_key, d_value) < 0)
 196                 return NULL;
 197         }
 198     }
 199     Py_RETURN_NONE;
 200 }
 201
 202
 203 static PyMethodDef BaseException_methods[] = {
 204    {"__reduce__", (PyCFunction)BaseException_reduce, METH_NOARGS },
 205    {"__setstate__", (PyCFunction)BaseException_setstate, METH_O },
 206 #ifdef Py_USING_UNICODE
 207    {"__unicode__", (PyCFunction)BaseException_unicode, METH_NOARGS },
 208 #endif
 209    {NULL, NULL, 0, NULL},
 210 };
 211
 212
 213
 214 static PyObject *
 215 BaseException_getitem(PyBaseExceptionObject *self, Py_ssize_t index)
 216 {
 217     if (PyErr_WarnPy3k("__getitem__ not supported for exception "
 218                        "classes in 3.x; use args attribute", 1) < 0)
 219         return NULL;
 220     return PySequence_GetItem(self->args, index);
 221 }
 222
 223 static PyObject *
 224 BaseException_getslice(PyBaseExceptionObject *self,
 225                         Py_ssize_t start, Py_ssize_t stop)
 226 {
 227     if (PyErr_WarnPy3k("__getslice__ not supported for exception "
 228                        "classes in 3.x; use args attribute", 1) < 0)
 229         return NULL;
 230     return PySequence_GetSlice(self->args, start, stop);
 231 }
 232
 233 static PySequenceMethods BaseException_as_sequence = {
 234     0,                      /* sq_length; */
 235     0,                      /* sq_concat; */
 236     0,                      /* sq_repeat; */
 237     (ssizeargfunc)BaseException_getitem,  /* sq_item; */
 238     (ssizessizeargfunc)BaseException_getslice,  /* sq_slice; */
 239     0,                      /* sq_ass_item; */
 240     0,                      /* sq_ass_slice; */
 241     0,                      /* sq_contains; */
 242     0,                      /* sq_inplace_concat; */
 243     0                       /* sq_inplace_repeat; */
 244 };
 245
 246 static PyObject *
 247 BaseException_get_dict(PyBaseExceptionObject *self)
 248 {
 249     if (self->dict == NULL) {
 250         self->dict = PyDict_New();
 251         if (!self->dict)
 252             return NULL;
 253     }
 254     Py_INCREF(self->dict);
 255     return self->dict;
 256 }
 257
 258 static int
 259 BaseException_set_dict(PyBaseExceptionObject *self, PyObject *val)
 260 {
 261     if (val == NULL) {
 262         PyErr_SetString(PyExc_TypeError, "__dict__ may not be deleted");
 263         return -1;
 264     }
 265     if (!PyDict_Check(val)) {
 266         PyErr_SetString(PyExc_TypeError, "__dict__ must be a dictionary");
 267         return -1;
 268     }
 269     Py_CLEAR(self->dict);
 270     Py_INCREF(val);
 271     self->dict = val;
 272     return 0;
 273 }
 274
 275 static PyObject *
 276 BaseException_get_args(PyBaseExceptionObject *self)
 277 {
 278     if (self->args == NULL) {
 279         Py_INCREF(Py_None);
 280         return Py_None;
 281     }
 282     Py_INCREF(self->args);
 283     return self->args;
 284 }
 285
 286 static int
 287 BaseException_set_args(PyBaseExceptionObject *self, PyObject *val)
 288 {
 289     PyObject *seq;
 290     if (val == NULL) {
 291         PyErr_SetString(PyExc_TypeError, "args may not be deleted");
 292         return -1;
 293     }
 294     seq = PySequence_Tuple(val);
 295     if (!seq) return -1;
 296     Py_CLEAR(self->args);
 297     self->args = seq;
 298     return 0;
 299 }
 300
 301 static PyObject *
 302 BaseException_get_message(PyBaseExceptionObject *self)
 303 {
 304         int ret;
 305         ret = PyErr_WarnEx(PyExc_DeprecationWarning,
 306                                 "BaseException.message has been deprecated as "
 307                                 "of Python 2.6", 1);
 308         if (ret < 0)
 309                 return NULL;
 310
 311         Py_INCREF(self->message);
 312         return self->message;
 313 }
 314
 315 static int
 316 BaseException_set_message(PyBaseExceptionObject *self, PyObject *val)
 317 {
 318         int ret;
 319         ret = PyErr_WarnEx(PyExc_DeprecationWarning,
 320                                 "BaseException.message has been deprecated as "
 321                                 "of Python 2.6", 1);
 322         if (ret < 0)
 323                 return -1;
 324         Py_INCREF(val);
 325         Py_DECREF(self->message);
 326         self->message = val;
 327         return 0;
 328 }
 329
 330 static PyGetSetDef BaseException_getset[] = {
 331     {"__dict__", (getter)BaseException_get_dict, (setter)BaseException_set_dict},
 332     {"args", (getter)BaseException_get_args, (setter)BaseException_set_args},
 333     {"message", (getter)BaseException_get_message,
 334             (setter)BaseException_set_message},
 335     {NULL},
 336 };
 337
 338
 339 static PyTypeObject _PyExc_BaseException = {
 340     PyObject_HEAD_INIT(NULL)
 341     0,                          /*ob_size*/
 342     EXC_MODULE_NAME "BaseException", /*tp_name*/
 343     sizeof(PyBaseExceptionObject), /*tp_basicsize*/
 344     0,                          /*tp_itemsize*/
 345     (destructor)BaseException_dealloc, /*tp_dealloc*/
 346     0,                          /*tp_print*/
 347     0,                          /*tp_getattr*/
 348     0,                          /*tp_setattr*/
 349     0,                          /* tp_compare; */
 350     (reprfunc)BaseException_repr, /*tp_repr*/
 351     0,                          /*tp_as_number*/
 352     &BaseException_as_sequence, /*tp_as_sequence*/
 353     0,                          /*tp_as_mapping*/
 354     0,                          /*tp_hash */
 355     0,                          /*tp_call*/
 356     (reprfunc)BaseException_str,  /*tp_str*/
 357     PyObject_GenericGetAttr,    /*tp_getattro*/
 358     PyObject_GenericSetAttr,    /*tp_setattro*/
 359     0,                          /*tp_as_buffer*/
 360     Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC |
 361         Py_TPFLAGS_BASE_EXC_SUBCLASS,  /*tp_flags*/
 362     PyDoc_STR("Common base class for all exceptions"), /* tp_doc */
 363     (traverseproc)BaseException_traverse, /* tp_traverse */
 364     (inquiry)BaseException_clear, /* tp_clear */
 365     0,                          /* tp_richcompare */
 366     0,                          /* tp_weaklistoffset */
 367     0,                          /* tp_iter */
 368     0,                          /* tp_iternext */
 369     BaseException_methods,      /* tp_methods */
 370     0,                          /* tp_members */
 371     BaseException_getset,       /* tp_getset */
 372     0,                          /* tp_base */
 373     0,                          /* tp_dict */
 374     0,                          /* tp_descr_get */
 375     0,                          /* tp_descr_set */
 376     offsetof(PyBaseExceptionObject, dict), /* tp_dictoffset */
 377     (initproc)BaseException_init, /* tp_init */
 378     0,                          /* tp_alloc */
 379     BaseException_new,          /* tp_new */
 380 };
 381 /* the CPython API expects exceptions to be (PyObject *) - both a hold-over
 382 from the previous implmentation and also allowing Python objects to be used
 383 in the API */
 384 PyObject *PyExc_BaseException = (PyObject *)&_PyExc_BaseException;
 385
 386 /* note these macros omit the last semicolon so the macro invocation may
 387  * include it and not look strange.
 388  */
 389 #define SimpleExtendsException(EXCBASE, EXCNAME, EXCDOC) \
 390 static PyTypeObject _PyExc_ ## EXCNAME = { \
 391     PyObject_HEAD_INIT(NULL) \
 392     0, \
 393     EXC_MODULE_NAME # EXCNAME, \
 394     sizeof(PyBaseExceptionObject), \
 395     0, (destructor)BaseException_dealloc, 0, 0, 0, 0, 0, 0, 0, \
 396     0, 0, 0, 0, 0, 0, 0, \
 397     Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, \
 398     PyDoc_STR(EXCDOC), (traverseproc)BaseException_traverse, \
 399     (inquiry)BaseException_clear, 0, 0, 0, 0, 0, 0, 0, &_ ## EXCBASE, \
 400     0, 0, 0, offsetof(PyBaseExceptionObject, dict), \
 401     (initproc)BaseException_init, 0, BaseException_new,\
 402 }; \
 403 PyObject *PyExc_ ## EXCNAME = (PyObject *)&_PyExc_ ## EXCNAME
 404
 405 #define MiddlingExtendsException(EXCBASE, EXCNAME, EXCSTORE, EXCDOC) \
 406 static PyTypeObject _PyExc_ ## EXCNAME = { \
 407     PyObject_HEAD_INIT(NULL) \
 408     0, \
 409     EXC_MODULE_NAME # EXCNAME, \
 410     sizeof(Py ## EXCSTORE ## Object), \
 411     0, (destructor)EXCSTORE ## _dealloc, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
 412     0, 0, 0, 0, 0, \
 413     Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, \
 414     PyDoc_STR(EXCDOC), (traverseproc)EXCSTORE ## _traverse, \
 415     (inquiry)EXCSTORE ## _clear, 0, 0, 0, 0, 0, 0, 0, &_ ## EXCBASE, \
 416     0, 0, 0, offsetof(Py ## EXCSTORE ## Object, dict), \
 417     (initproc)EXCSTORE ## _init, 0, BaseException_new,\
 418 }; \
 419 PyObject *PyExc_ ## EXCNAME = (PyObject *)&_PyExc_ ## EXCNAME
 420
 421 #define ComplexExtendsException(EXCBASE, EXCNAME, EXCSTORE, EXCDEALLOC, EXCMETHODS, EXCMEMBERS, EXCSTR, EXCDOC) \
 422 static PyTypeObject _PyExc_ ## EXCNAME = { \
 423     PyObject_HEAD_INIT(NULL) \
 424     0, \
 425     EXC_MODULE_NAME # EXCNAME, \
 426     sizeof(Py ## EXCSTORE ## Object), 0, \
 427     (destructor)EXCSTORE ## _dealloc, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
 428     (reprfunc)EXCSTR, 0, 0, 0, \
 429     Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, \
 430     PyDoc_STR(EXCDOC), (traverseproc)EXCSTORE ## _traverse, \
 431     (inquiry)EXCSTORE ## _clear, 0, 0, 0, 0, EXCMETHODS, \
 432     EXCMEMBERS, 0, &_ ## EXCBASE, \
 433     0, 0, 0, offsetof(Py ## EXCSTORE ## Object, dict), \
 434     (initproc)EXCSTORE ## _init, 0, BaseException_new,\
 435 }; \
 436 PyObject *PyExc_ ## EXCNAME = (PyObject *)&_PyExc_ ## EXCNAME
 437
 438
 439 /*
 440  *    Exception extends BaseException
 441  */
 442 SimpleExtendsException(PyExc_BaseException, Exception,
 443                        "Common base class for all non-exit exceptions.");
 444
 445
 446 /*
 447  *    StandardError extends Exception
 448  */
 449 SimpleExtendsException(PyExc_Exception, StandardError,
 450     "Base class for all standard Python exceptions that do not represent\n"
 451     "interpreter exiting.");
 452
 453
 454 /*
 455  *    TypeError extends StandardError
 456  */
 457 SimpleExtendsException(PyExc_StandardError, TypeError,
 458                        "Inappropriate argument type.");
 459
 460
 461 /*
 462  *    StopIteration extends Exception
 463  */
 464 SimpleExtendsException(PyExc_Exception, StopIteration,
 465                        "Signal the end from iterator.next().");
 466
 467
 468 /*
 469  *    GeneratorExit extends BaseException
 470  */
 471 SimpleExtendsException(PyExc_BaseException, GeneratorExit,
 472                        "Request that a generator exit.");
 473
 474
 475 /*
 476  *    SystemExit extends BaseException
 477  */
 478
 479 static int
 480 SystemExit_init(PySystemExitObject *self, PyObject *args, PyObject *kwds)
 481 {
 482     Py_ssize_t size = PyTuple_GET_SIZE(args);
 483
 484     if (BaseException_init((PyBaseExceptionObject *)self, args, kwds) == -1)
 485         return -1;
 486
 487     if (size == 0)
 488         return 0;
 489     Py_CLEAR(self->code);
 490     if (size == 1)
 491         self->code = PyTuple_GET_ITEM(args, 0);
 492     else if (size > 1)
 493         self->code = args;
 494     Py_INCREF(self->code);
 495     return 0;
 496 }
 497
 498 static int
 499 SystemExit_clear(PySystemExitObject *self)
 500 {
 501     Py_CLEAR(self->code);
 502     return BaseException_clear((PyBaseExceptionObject *)self);
 503 }
 504
 505 static void
 506 SystemExit_dealloc(PySystemExitObject *self)
 507 {
 508     _PyObject_GC_UNTRACK(self);
 509     SystemExit_clear(self);
 510     Py_TYPE(self)->tp_free((PyObject *)self);
 511 }
 512
 513 static int
 514 SystemExit_traverse(PySystemExitObject *self, visitproc visit, void *arg)
 515 {
 516     Py_VISIT(self->code);
 517     return BaseException_traverse((PyBaseExceptionObject *)self, visit, arg);
 518 }
 519
 520 static PyMemberDef SystemExit_members[] = {
 521     {"code", T_OBJECT, offsetof(PySystemExitObject, code), 0,
 522         PyDoc_STR("exception code")},
 523     {NULL}  /* Sentinel */
 524 };
 525
 526 ComplexExtendsException(PyExc_BaseException, SystemExit, SystemExit,
 527                         SystemExit_dealloc, 0, SystemExit_members, 0,
 528                         "Request to exit from the interpreter.");
 529
 530 /*
 531  *    KeyboardInterrupt extends BaseException
 532  */
 533 SimpleExtendsException(PyExc_BaseException, KeyboardInterrupt,
 534                        "Program interrupted by user.");
 535
 536
 537 /*
 538  *    ImportError extends StandardError
 539  */
 540 SimpleExtendsException(PyExc_StandardError, ImportError,
 541           "Import can't find module, or can't find name in module.");
 542
 543
 544 /*
 545  *    EnvironmentError extends StandardError
 546  */
 547
 548 /* Where a function has a single filename, such as open() or some
 549  * of the os module functions, PyErr_SetFromErrnoWithFilename() is
 550  * called, giving a third argument which is the filename.  But, so
 551  * that old code using in-place unpacking doesn't break, e.g.:
 552  *
 553  * except IOError, (errno, strerror):
 554  *
 555  * we hack args so that it only contains two items.  This also
 556  * means we need our own __str__() which prints out the filename
 557  * when it was supplied.
 558  */
 559 static int
 560 EnvironmentError_init(PyEnvironmentErrorObject *self, PyObject *args,
 561     PyObject *kwds)
 562 {
 563     PyObject *myerrno = NULL, *strerror = NULL, *filename = NULL;
 564     PyObject *subslice = NULL;
 565
 566     if (BaseException_init((PyBaseExceptionObject *)self, args, kwds) == -1)
 567         return -1;
 568
 569     if (PyTuple_GET_SIZE(args) <= 1 || PyTuple_GET_SIZE(args) > 3) {
 570         return 0;
 571     }
 572
 573     if (!PyArg_UnpackTuple(args, "EnvironmentError", 2, 3,
 574                            &myerrno, &strerror, &filename)) {
 575         return -1;
 576     }
 577     Py_CLEAR(self->myerrno);       /* replacing */
 578     self->myerrno = myerrno;
 579     Py_INCREF(self->myerrno);
 580
 581     Py_CLEAR(self->strerror);      /* replacing */
 582     self->strerror = strerror;
 583     Py_INCREF(self->strerror);
 584
 585     /* self->filename will remain Py_None otherwise */
 586     if (filename != NULL) {
 587         Py_CLEAR(self->filename);      /* replacing */
 588         self->filename = filename;
 589         Py_INCREF(self->filename);
 590
 591         subslice = PyTuple_GetSlice(args, 0, 2);
 592         if (!subslice)
 593             return -1;
 594
 595         Py_DECREF(self->args);  /* replacing args */
 596         self->args = subslice;
 597     }
 598     return 0;
 599 }
 600
 601 static int
 602 EnvironmentError_clear(PyEnvironmentErrorObject *self)
 603 {
 604     Py_CLEAR(self->myerrno);
 605     Py_CLEAR(self->strerror);
 606     Py_CLEAR(self->filename);
 607     return BaseException_clear((PyBaseExceptionObject *)self);
 608 }
 609
 610 static void
 611 EnvironmentError_dealloc(PyEnvironmentErrorObject *self)
 612 {
 613     _PyObject_GC_UNTRACK(self);
 614     EnvironmentError_clear(self);
 615     Py_TYPE(self)->tp_free((PyObject *)self);
 616 }
 617
 618 static int
 619 EnvironmentError_traverse(PyEnvironmentErrorObject *self, visitproc visit,
 620         void *arg)
 621 {
 622     Py_VISIT(self->myerrno);
 623     Py_VISIT(self->strerror);
 624     Py_VISIT(self->filename);
 625     return BaseException_traverse((PyBaseExceptionObject *)self, visit, arg);
 626 }
 627
 628 static PyObject *
 629 EnvironmentError_str(PyEnvironmentErrorObject *self)
 630 {
 631     PyObject *rtnval = NULL;
 632
 633     if (self->filename) {
 634         PyObject *fmt;
 635         PyObject *repr;
 636         PyObject *tuple;
 637
 638         fmt = PyString_FromString("[Errno %s] %s: %s");
 639         if (!fmt)
 640             return NULL;
 641
 642         repr = PyObject_Repr(self->filename);
 643         if (!repr) {
 644             Py_DECREF(fmt);
 645             return NULL;
 646         }
 647         tuple = PyTuple_New(3);
 648         if (!tuple) {
 649             Py_DECREF(repr);
 650             Py_DECREF(fmt);
 651             return NULL;
 652         }
 653
 654         if (self->myerrno) {
 655             Py_INCREF(self->myerrno);
 656             PyTuple_SET_ITEM(tuple, 0, self->myerrno);
 657         }
 658         else {
 659             Py_INCREF(Py_None);
 660             PyTuple_SET_ITEM(tuple, 0, Py_None);
 661         }
 662         if (self->strerror) {
 663             Py_INCREF(self->strerror);
 664             PyTuple_SET_ITEM(tuple, 1, self->strerror);
 665         }
 666         else {
 667             Py_INCREF(Py_None);
 668             PyTuple_SET_ITEM(tuple, 1, Py_None);
 669         }
 670
 671         PyTuple_SET_ITEM(tuple, 2, repr);
 672
 673         rtnval = PyString_Format(fmt, tuple);
 674
 675         Py_DECREF(fmt);
 676         Py_DECREF(tuple);
 677     }
 678     else if (self->myerrno && self->strerror) {
 679         PyObject *fmt;
 680         PyObject *tuple;
 681
 682         fmt = PyString_FromString("[Errno %s] %s");
 683         if (!fmt)
 684             return NULL;
 685
 686         tuple = PyTuple_New(2);
 687         if (!tuple) {
 688             Py_DECREF(fmt);
 689             return NULL;
 690         }
 691
 692         if (self->myerrno) {
 693             Py_INCREF(self->myerrno);
 694             PyTuple_SET_ITEM(tuple, 0, self->myerrno);
 695         }
 696         else {
 697             Py_INCREF(Py_None);
 698             PyTuple_SET_ITEM(tuple, 0, Py_None);
 699         }
 700         if (self->strerror) {
 701             Py_INCREF(self->strerror);
 702             PyTuple_SET_ITEM(tuple, 1, self->strerror);
 703         }
 704         else {
 705             Py_INCREF(Py_None);
 706             PyTuple_SET_ITEM(tuple, 1, Py_None);
 707         }
 708
 709         rtnval = PyString_Format(fmt, tuple);
 710
 711         Py_DECREF(fmt);
 712         Py_DECREF(tuple);
 713     }
 714     else
 715         rtnval = BaseException_str((PyBaseExceptionObject *)self);
 716
 717     return rtnval;
 718 }
 719
 720 static PyMemberDef EnvironmentError_members[] = {
 721     {"errno", T_OBJECT, offsetof(PyEnvironmentErrorObject, myerrno), 0,
 722         PyDoc_STR("exception errno")},
 723     {"strerror", T_OBJECT, offsetof(PyEnvironmentErrorObject, strerror), 0,
 724         PyDoc_STR("exception strerror")},
 725     {"filename", T_OBJECT, offsetof(PyEnvironmentErrorObject, filename), 0,
 726         PyDoc_STR("exception filename")},
 727     {NULL}  /* Sentinel */
 728 };
 729
 730
 731 static PyObject *
 732 EnvironmentError_reduce(PyEnvironmentErrorObject *self)
 733 {
 734     PyObject *args = self->args;
 735     PyObject *res = NULL, *tmp;
 736
 737     /* self->args is only the first two real arguments if there was a
 738      * file name given to EnvironmentError. */
 739     if (PyTuple_GET_SIZE(args) == 2 && self->filename) {
 740         args = PyTuple_New(3);
 741         if (!args) return NULL;
 742
 743         tmp = PyTuple_GET_ITEM(self->args, 0);
 744         Py_INCREF(tmp);
 745         PyTuple_SET_ITEM(args, 0, tmp);
 746
 747         tmp = PyTuple_GET_ITEM(self->args, 1);
 748         Py_INCREF(tmp);
 749         PyTuple_SET_ITEM(args, 1, tmp);
 750
 751         Py_INCREF(self->filename);
 752         PyTuple_SET_ITEM(args, 2, self->filename);
 753     } else
 754         Py_INCREF(args);
 755
 756     if (self->dict)
 757         res = PyTuple_Pack(3, Py_TYPE(self), args, self->dict);
 758     else
 759         res = PyTuple_Pack(2, Py_TYPE(self), args);
 760     Py_DECREF(args);
 761     return res;
 762 }
 763
 764
 765 static PyMethodDef EnvironmentError_methods[] = {
 766     {"__reduce__", (PyCFunction)EnvironmentError_reduce, METH_NOARGS},
 767     {NULL}
 768 };
 769
 770 ComplexExtendsException(PyExc_StandardError, EnvironmentError,
 771                         EnvironmentError, EnvironmentError_dealloc,
 772                         EnvironmentError_methods, EnvironmentError_members,
 773                         EnvironmentError_str,
 774                         "Base class for I/O related errors.");
 775
 776
 777 /*
 778  *    IOError extends EnvironmentError
 779  */
 780 MiddlingExtendsException(PyExc_EnvironmentError, IOError,
 781                          EnvironmentError, "I/O operation failed.");
 782
 783
 784 /*
 785  *    OSError extends EnvironmentError
 786  */
 787 MiddlingExtendsException(PyExc_EnvironmentError, OSError,
 788                          EnvironmentError, "OS system call failed.");
 789
 790
 791 /*
 792  *    WindowsError extends OSError
 793  */
 794 #ifdef MS_WINDOWS
 795 #include "errmap.h"
 796
 797 static int
 798 WindowsError_clear(PyWindowsErrorObject *self)
 799 {
 800     Py_CLEAR(self->myerrno);
 801     Py_CLEAR(self->strerror);
 802     Py_CLEAR(self->filename);
 803     Py_CLEAR(self->winerror);
 804     return BaseException_clear((PyBaseExceptionObject *)self);
 805 }
 806
 807 static void
 808 WindowsError_dealloc(PyWindowsErrorObject *self)
 809 {
 810     _PyObject_GC_UNTRACK(self);
 811     WindowsError_clear(self);
 812     Py_TYPE(self)->tp_free((PyObject *)self);
 813 }
 814
 815 static int
 816 WindowsError_traverse(PyWindowsErrorObject *self, visitproc visit, void *arg)
 817 {
 818     Py_VISIT(self->myerrno);
 819     Py_VISIT(self->strerror);
 820     Py_VISIT(self->filename);
 821     Py_VISIT(self->winerror);
 822     return BaseException_traverse((PyBaseExceptionObject *)self, visit, arg);
 823 }
 824
 825 static int
 826 WindowsError_init(PyWindowsErrorObject *self, PyObject *args, PyObject *kwds)
 827 {
 828     PyObject *o_errcode = NULL;
 829     long errcode;
 830     long posix_errno;
 831
 832     if (EnvironmentError_init((PyEnvironmentErrorObject *)self, args, kwds)
 833             == -1)
 834         return -1;
 835
 836     if (self->myerrno == NULL)
 837         return 0;
 838
 839     /* Set errno to the POSIX errno, and winerror to the Win32
 840        error code. */
 841     errcode = PyInt_AsLong(self->myerrno);
 842     if (errcode == -1 && PyErr_Occurred())
 843         return -1;
 844     posix_errno = winerror_to_errno(errcode);
 845
 846     Py_CLEAR(self->winerror);
 847     self->winerror = self->myerrno;
 848
 849     o_errcode = PyInt_FromLong(posix_errno);
 850     if (!o_errcode)
 851         return -1;
 852
 853     self->myerrno = o_errcode;
 854
 855     return 0;
 856 }
 857
 858
 859 static PyObject *
 860 WindowsError_str(PyWindowsErrorObject *self)
 861 {
 862     PyObject *rtnval = NULL;
 863
 864     if (self->filename) {
 865         PyObject *fmt;
 866         PyObject *repr;
 867         PyObject *tuple;
 868
 869         fmt = PyString_FromString("[Error %s] %s: %s");
 870         if (!fmt)
 871             return NULL;
 872
 873         repr = PyObject_Repr(self->filename);
 874         if (!repr) {
 875             Py_DECREF(fmt);
 876             return NULL;
 877         }
 878         tuple = PyTuple_New(3);
 879         if (!tuple) {
 880             Py_DECREF(repr);
 881             Py_DECREF(fmt);
 882             return NULL;
 883         }
 884
 885         if (self->winerror) {
 886             Py_INCREF(self->winerror);
 887             PyTuple_SET_ITEM(tuple, 0, self->winerror);
 888         }
 889         else {
 890             Py_INCREF(Py_None);
 891             PyTuple_SET_ITEM(tuple, 0, Py_None);
 892         }
 893         if (self->strerror) {
 894             Py_INCREF(self->strerror);
 895             PyTuple_SET_ITEM(tuple, 1, self->strerror);
 896         }
 897         else {
 898             Py_INCREF(Py_None);
 899             PyTuple_SET_ITEM(tuple, 1, Py_None);
 900         }
 901
 902         PyTuple_SET_ITEM(tuple, 2, repr);
 903
 904         rtnval = PyString_Format(fmt, tuple);
 905
 906         Py_DECREF(fmt);
 907         Py_DECREF(tuple);
 908     }
 909     else if (self->winerror && self->strerror) {
 910         PyObject *fmt;
 911         PyObject *tuple;
 912
 913         fmt = PyString_FromString("[Error %s] %s");
 914         if (!fmt)
 915             return NULL;
 916
 917         tuple = PyTuple_New(2);
 918         if (!tuple) {
 919             Py_DECREF(fmt);
 920             return NULL;
 921         }
 922
 923         if (self->winerror) {
 924             Py_INCREF(self->winerror);
 925             PyTuple_SET_ITEM(tuple, 0, self->winerror);
 926         }
 927         else {
 928             Py_INCREF(Py_None);
 929             PyTuple_SET_ITEM(tuple, 0, Py_None);
 930         }
 931         if (self->strerror) {
 932             Py_INCREF(self->strerror);
 933             PyTuple_SET_ITEM(tuple, 1, self->strerror);
 934         }
 935         else {
 936             Py_INCREF(Py_None);
 937             PyTuple_SET_ITEM(tuple, 1, Py_None);
 938         }
 939
 940         rtnval = PyString_Format(fmt, tuple);
 941
 942         Py_DECREF(fmt);
 943         Py_DECREF(tuple);
 944     }
 945     else
 946         rtnval = EnvironmentError_str((PyEnvironmentErrorObject *)self);
 947
 948     return rtnval;
 949 }
 950
 951 static PyMemberDef WindowsError_members[] = {
 952     {"errno", T_OBJECT, offsetof(PyWindowsErrorObject, myerrno), 0,
 953         PyDoc_STR("POSIX exception code")},
 954     {"strerror", T_OBJECT, offsetof(PyWindowsErrorObject, strerror), 0,
 955         PyDoc_STR("exception strerror")},
 956     {"filename", T_OBJECT, offsetof(PyWindowsErrorObject, filename), 0,
 957         PyDoc_STR("exception filename")},
 958     {"winerror", T_OBJECT, offsetof(PyWindowsErrorObject, winerror), 0,
 959         PyDoc_STR("Win32 exception code")},
 960     {NULL}  /* Sentinel */
 961 };
 962
 963 ComplexExtendsException(PyExc_OSError, WindowsError, WindowsError,
 964                         WindowsError_dealloc, 0, WindowsError_members,
 965                         WindowsError_str, "MS-Windows OS system call failed.");
 966
 967 #endif /* MS_WINDOWS */
 968
 969
 970 /*
 971  *    VMSError extends OSError (I think)
 972  */
 973 #ifdef __VMS
 974 MiddlingExtendsException(PyExc_OSError, VMSError, EnvironmentError,
 975                          "OpenVMS OS system call failed.");
 976 #endif
 977
 978
 979 /*
 980  *    EOFError extends StandardError
 981  */
 982 SimpleExtendsException(PyExc_StandardError, EOFError,
 983                        "Read beyond end of file.");
 984
 985
 986 /*
 987  *    RuntimeError extends StandardError
 988  */
 989 SimpleExtendsException(PyExc_StandardError, RuntimeError,
 990                        "Unspecified run-time error.");
 991
 992
 993 /*
 994  *    NotImplementedError extends RuntimeError
 995  */
 996 SimpleExtendsException(PyExc_RuntimeError, NotImplementedError,
 997                        "Method or function hasn't been implemented yet.");
 998
 999 /*
1000  *    NameError extends StandardError
1001  */
1002 SimpleExtendsException(PyExc_StandardError, NameError,
1003                        "Name not found globally.");
1004
1005 /*
1006  *    UnboundLocalError extends NameError
1007  */
1008 SimpleExtendsException(PyExc_NameError, UnboundLocalError,
1009                        "Local name referenced but not bound to a value.");
1010
1011 /*
1012  *    AttributeError extends StandardError
1013  */
1014 SimpleExtendsException(PyExc_StandardError, AttributeError,
1015                        "Attribute not found.");
1016
1017
1018 /*
1019  *    SyntaxError extends StandardError
1020  */
1021
1022 static int
1023 SyntaxError_init(PySyntaxErrorObject *self, PyObject *args, PyObject *kwds)
1024 {
1025     PyObject *info = NULL;
1026     Py_ssize_t lenargs = PyTuple_GET_SIZE(args);
1027
1028     if (BaseException_init((PyBaseExceptionObject *)self, args, kwds) == -1)
1029         return -1;
1030
1031     if (lenargs >= 1) {
1032         Py_CLEAR(self->msg);
1033         self->msg = PyTuple_GET_ITEM(args, 0);
1034         Py_INCREF(self->msg);
1035     }
1036     if (lenargs == 2) {
1037         info = PyTuple_GET_ITEM(args, 1);
1038         info = PySequence_Tuple(info);
1039         if (!info) return -1;
1040
1041         if (PyTuple_GET_SIZE(info) != 4) {
1042             /* not a very good error message, but it's what Python 2.4 gives */
1043             PyErr_SetString(PyExc_IndexError, "tuple index out of range");
1044             Py_DECREF(info);
1045             return -1;
1046         }
1047
1048         Py_CLEAR(self->filename);
1049         self->filename = PyTuple_GET_ITEM(info, 0);
1050         Py_INCREF(self->filename);
1051
1052         Py_CLEAR(self->lineno);
1053         self->lineno = PyTuple_GET_ITEM(info, 1);
1054         Py_INCREF(self->lineno);
1055
1056         Py_CLEAR(self->offset);
1057         self->offset = PyTuple_GET_ITEM(info, 2);
1058         Py_INCREF(self->offset);
1059
1060         Py_CLEAR(self->text);
1061         self->text = PyTuple_GET_ITEM(info, 3);
1062         Py_INCREF(self->text);
1063
1064         Py_DECREF(info);
1065     }
1066     return 0;
1067 }
1068
1069 static int
1070 SyntaxError_clear(PySyntaxErrorObject *self)
1071 {
1072     Py_CLEAR(self->msg);
1073     Py_CLEAR(self->filename);
1074     Py_CLEAR(self->lineno);
1075     Py_CLEAR(self->offset);
1076     Py_CLEAR(self->text);
1077     Py_CLEAR(self->print_file_and_line);
1078     return BaseException_clear((PyBaseExceptionObject *)self);
1079 }
1080
1081 static void
1082 SyntaxError_dealloc(PySyntaxErrorObject *self)
1083 {
1084     _PyObject_GC_UNTRACK(self);
1085     SyntaxError_clear(self);
1086     Py_TYPE(self)->tp_free((PyObject *)self);
1087 }
1088
1089 static int
1090 SyntaxError_traverse(PySyntaxErrorObject *self, visitproc visit, void *arg)
1091 {
1092     Py_VISIT(self->msg);
1093     Py_VISIT(self->filename);
1094     Py_VISIT(self->lineno);
1095     Py_VISIT(self->offset);
1096     Py_VISIT(self->text);
1097     Py_VISIT(self->print_file_and_line);
1098     return BaseException_traverse((PyBaseExceptionObject *)self, visit, arg);
1099 }
1100
1101 /* This is called "my_basename" instead of just "basename" to avoid name
1102    conflicts with glibc; basename is already prototyped if _GNU_SOURCE is
1103    defined, and Python does define that. */
1104 static char *
1105 my_basename(char *name)
1106 {
1107     char *cp = name;
1108     char *result = name;
1109
1110     if (name == NULL)
1111         return "???";
1112     while (*cp != '\0') {
1113         if (*cp == SEP)
1114             result = cp + 1;
1115         ++cp;
1116     }
1117     return result;
1118 }
1119
1120
1121 static PyObject *
1122 SyntaxError_str(PySyntaxErrorObject *self)
1123 {
1124     PyObject *str;
1125     PyObject *result;
1126     int have_filename = 0;
1127     int have_lineno = 0;
1128     char *buffer = NULL;
1129     Py_ssize_t bufsize;
1130
1131     if (self->msg)
1132         str = PyObject_Str(self->msg);
1133     else
1134         str = PyObject_Str(Py_None);
1135     if (!str) return NULL;
1136     /* Don't fiddle with non-string return (shouldn't happen anyway) */
1137     if (!PyString_Check(str)) return str;
1138
1139     /* XXX -- do all the additional formatting with filename and
1140        lineno here */
1141
1142     have_filename = (self->filename != NULL) &&
1143         PyString_Check(self->filename);
1144     have_lineno = (self->lineno != NULL) && PyInt_Check(self->lineno);
1145
1146     if (!have_filename && !have_lineno)
1147         return str;
1148
1149     bufsize = PyString_GET_SIZE(str) + 64;
1150     if (have_filename)
1151         bufsize += PyString_GET_SIZE(self->filename);
1152
1153     buffer = PyMem_MALLOC(bufsize);
1154     if (buffer == NULL)
1155         return str;
1156
1157     if (have_filename && have_lineno)
1158         PyOS_snprintf(buffer, bufsize, "%s (%s, line %ld)",
1159             PyString_AS_STRING(str),
1160             my_basename(PyString_AS_STRING(self->filename)),
1161             PyInt_AsLong(self->lineno));
1162     else if (have_filename)
1163         PyOS_snprintf(buffer, bufsize, "%s (%s)",
1164             PyString_AS_STRING(str),
1165             my_basename(PyString_AS_STRING(self->filename)));
1166     else /* only have_lineno */
1167         PyOS_snprintf(buffer, bufsize, "%s (line %ld)",
1168             PyString_AS_STRING(str),
1169             PyInt_AsLong(self->lineno));
1170
1171     result = PyString_FromString(buffer);
1172     PyMem_FREE(buffer);
1173
1174     if (result == NULL)
1175         result = str;
1176     else
1177         Py_DECREF(str);
1178     return result;
1179 }
1180
1181 static PyMemberDef SyntaxError_members[] = {
1182     {"msg", T_OBJECT, offsetof(PySyntaxErrorObject, msg), 0,
1183         PyDoc_STR("exception msg")},
1184     {"filename", T_OBJECT, offsetof(PySyntaxErrorObject, filename), 0,
1185         PyDoc_STR("exception filename")},
1186     {"lineno", T_OBJECT, offsetof(PySyntaxErrorObject, lineno), 0,
1187         PyDoc_STR("exception lineno")},
1188     {"offset", T_OBJECT, offsetof(PySyntaxErrorObject, offset), 0,
1189         PyDoc_STR("exception offset")},
1190     {"text", T_OBJECT, offsetof(PySyntaxErrorObject, text), 0,
1191         PyDoc_STR("exception text")},
1192     {"print_file_and_line", T_OBJECT,
1193         offsetof(PySyntaxErrorObject, print_file_and_line), 0,
1194         PyDoc_STR("exception print_file_and_line")},
1195     {NULL}  /* Sentinel */
1196 };
1197
1198 ComplexExtendsException(PyExc_StandardError, SyntaxError, SyntaxError,
1199                         SyntaxError_dealloc, 0, SyntaxError_members,
1200                         SyntaxError_str, "Invalid syntax.");
1201
1202
1203 /*
1204  *    IndentationError extends SyntaxError
1205  */
1206 MiddlingExtendsException(PyExc_SyntaxError, IndentationError, SyntaxError,
1207                          "Improper indentation.");
1208
1209
1210 /*
1211  *    TabError extends IndentationError
1212  */
1213 MiddlingExtendsException(PyExc_IndentationError, TabError, SyntaxError,
1214                          "Improper mixture of spaces and tabs.");
1215
1216
1217 /*
1218  *    LookupError extends StandardError
1219  */
1220 SimpleExtendsException(PyExc_StandardError, LookupError,
1221                        "Base class for lookup errors.");
1222
1223
1224 /*
1225  *    IndexError extends LookupError
1226  */
1227 SimpleExtendsException(PyExc_LookupError, IndexError,
1228                        "Sequence index out of range.");
1229
1230
1231 /*
1232  *    KeyError extends LookupError
1233  */
1234 static PyObject *
1235 KeyError_str(PyBaseExceptionObject *self)
1236 {
1237     /* If args is a tuple of exactly one item, apply repr to args[0].
1238        This is done so that e.g. the exception raised by {}[''] prints
1239          KeyError: ''
1240        rather than the confusing
1241          KeyError
1242        alone.  The downside is that if KeyError is raised with an explanatory
1243        string, that string will be displayed in quotes.  Too bad.
1244        If args is anything else, use the default BaseException__str__().
1245     */
1246     if (PyTuple_GET_SIZE(self->args) == 1) {
1247         return PyObject_Repr(PyTuple_GET_ITEM(self->args, 0));
1248     }
1249     return BaseException_str(self);
1250 }
1251
1252 ComplexExtendsException(PyExc_LookupError, KeyError, BaseException,
1253                         0, 0, 0, KeyError_str, "Mapping key not found.");
1254
1255
1256 /*
1257  *    ValueError extends StandardError
1258  */
1259 SimpleExtendsException(PyExc_StandardError, ValueError,
1260                        "Inappropriate argument value (of correct type).");
1261
1262 /*
1263  *    UnicodeError extends ValueError
1264  */
1265
1266 SimpleExtendsException(PyExc_ValueError, UnicodeError,
1267                        "Unicode related error.");
1268
1269 #ifdef Py_USING_UNICODE
1270 static PyObject *
1271 get_string(PyObject *attr, const char *name)
1272 {
1273     if (!attr) {
1274         PyErr_Format(PyExc_TypeError, "%.200s attribute not set", name);
1275         return NULL;
1276     }
1277
1278     if (!PyString_Check(attr)) {
1279         PyErr_Format(PyExc_TypeError, "%.200s attribute must be str", name);
1280         return NULL;
1281     }
1282     Py_INCREF(attr);
1283     return attr;
1284 }
1285
1286
1287 static int
1288 set_string(PyObject **attr, const char *value)
1289 {
1290     PyObject *obj = PyString_FromString(value);
1291     if (!obj)
1292         return -1;
1293     Py_CLEAR(*attr);
1294     *attr = obj;
1295     return 0;
1296 }
1297
1298
1299 static PyObject *
1300 get_unicode(PyObject *attr, const char *name)
1301 {
1302     if (!attr) {
1303         PyErr_Format(PyExc_TypeError, "%.200s attribute not set", name);
1304         return NULL;
1305     }
1306
1307     if (!PyUnicode_Check(attr)) {
1308         PyErr_Format(PyExc_TypeError,
1309                      "%.200s attribute must be unicode", name);
1310         return NULL;
1311     }
1312     Py_INCREF(attr);
1313     return attr;
1314 }
1315
1316 PyObject *
1317 PyUnicodeEncodeError_GetEncoding(PyObject *exc)
1318 {
1319     return get_string(((PyUnicodeErrorObject *)exc)->encoding, "encoding");
1320 }
1321
1322 PyObject *
1323 PyUnicodeDecodeError_GetEncoding(PyObject *exc)
1324 {
1325     return get_string(((PyUnicodeErrorObject *)exc)->encoding, "encoding");
1326 }
1327
1328 PyObject *
1329 PyUnicodeEncodeError_GetObject(PyObject *exc)
1330 {
1331     return get_unicode(((PyUnicodeErrorObject *)exc)->object, "object");
1332 }
1333
1334 PyObject *
1335 PyUnicodeDecodeError_GetObject(PyObject *exc)
1336 {
1337     return get_string(((PyUnicodeErrorObject *)exc)->object, "object");
1338 }
1339
1340 PyObject *
1341 PyUnicodeTranslateError_GetObject(PyObject *exc)
1342 {
1343     return get_unicode(((PyUnicodeErrorObject *)exc)->object, "object");
1344 }
1345
1346 int
1347 PyUnicodeEncodeError_GetStart(PyObject *exc, Py_ssize_t *start)
1348 {
1349     Py_ssize_t size;
1350     PyObject *obj = get_unicode(((PyUnicodeErrorObject *)exc)->object,
1351                                 "object");
1352     if (!obj)
1353         return -1;
1354     *start = ((PyUnicodeErrorObject *)exc)->start;
1355     size = PyUnicode_GET_SIZE(obj);
1356     if (*start<0)
1357         *start = 0; /*XXX check for values <0*/
1358     if (*start>=size)
1359         *start = size-1;
1360     Py_DECREF(obj);
1361     return 0;
1362 }
1363
1364
1365 int
1366 PyUnicodeDecodeError_GetStart(PyObject *exc, Py_ssize_t *start)
1367 {
1368     Py_ssize_t size;
1369     PyObject *obj = get_string(((PyUnicodeErrorObject *)exc)->object,
1370                                "object");
1371     if (!obj)
1372         return -1;
1373     size = PyString_GET_SIZE(obj);
1374     *start = ((PyUnicodeErrorObject *)exc)->start;
1375     if (*start<0)
1376         *start = 0;
1377     if (*start>=size)
1378         *start = size-1;
1379     Py_DECREF(obj);
1380     return 0;
1381 }
1382
1383
1384 int
1385 PyUnicodeTranslateError_GetStart(PyObject *exc, Py_ssize_t *start)
1386 {
1387     return PyUnicodeEncodeError_GetStart(exc, start);
1388 }
1389
1390
1391 int
1392 PyUnicodeEncodeError_SetStart(PyObject *exc, Py_ssize_t start)
1393 {
1394     ((PyUnicodeErrorObject *)exc)->start = start;
1395     return 0;
1396 }
1397
1398
1399 int
1400 PyUnicodeDecodeError_SetStart(PyObject *exc, Py_ssize_t start)
1401 {
1402     ((PyUnicodeErrorObject *)exc)->start = start;
1403     return 0;
1404 }
1405
1406
1407 int
1408 PyUnicodeTranslateError_SetStart(PyObject *exc, Py_ssize_t start)
1409 {
1410     ((PyUnicodeErrorObject *)exc)->start = start;
1411     return 0;
1412 }
1413
1414
1415 int
1416 PyUnicodeEncodeError_GetEnd(PyObject *exc, Py_ssize_t *end)
1417 {
1418     Py_ssize_t size;
1419     PyObject *obj = get_unicode(((PyUnicodeErrorObject *)exc)->object,
1420                                 "object");
1421     if (!obj)
1422         return -1;
1423     *end = ((PyUnicodeErrorObject *)exc)->end;
1424     size = PyUnicode_GET_SIZE(obj);
1425     if (*end<1)
1426         *end = 1;
1427     if (*end>size)
1428         *end = size;
1429     Py_DECREF(obj);
1430     return 0;
1431 }
1432
1433
1434 int
1435 PyUnicodeDecodeError_GetEnd(PyObject *exc, Py_ssize_t *end)
1436 {
1437     Py_ssize_t size;
1438     PyObject *obj = get_string(((PyUnicodeErrorObject *)exc)->object,
1439                                "object");
1440     if (!obj)
1441         return -1;
1442     *end = ((PyUnicodeErrorObject *)exc)->end;
1443     size = PyString_GET_SIZE(obj);
1444     if (*end<1)
1445         *end = 1;
1446     if (*end>size)
1447         *end = size;
1448     Py_DECREF(obj);
1449     return 0;
1450 }
1451
1452
1453 int
1454 PyUnicodeTranslateError_GetEnd(PyObject *exc, Py_ssize_t *start)
1455 {
1456     return PyUnicodeEncodeError_GetEnd(exc, start);
1457 }
1458
1459
1460 int
1461 PyUnicodeEncodeError_SetEnd(PyObject *exc, Py_ssize_t end)
1462 {
1463     ((PyUnicodeErrorObject *)exc)->end = end;
1464     return 0;
1465 }
1466
1467
1468 int
1469 PyUnicodeDecodeError_SetEnd(PyObject *exc, Py_ssize_t end)
1470 {
1471     ((PyUnicodeErrorObject *)exc)->end = end;
1472     return 0;
1473 }
1474
1475
1476 int
1477 PyUnicodeTranslateError_SetEnd(PyObject *exc, Py_ssize_t end)
1478 {
1479     ((PyUnicodeErrorObject *)exc)->end = end;
1480     return 0;
1481 }
1482
1483 PyObject *
1484 PyUnicodeEncodeError_GetReason(PyObject *exc)
1485 {
1486     return get_string(((PyUnicodeErrorObject *)exc)->reason, "reason");
1487 }
1488
1489
1490 PyObject *
1491 PyUnicodeDecodeError_GetReason(PyObject *exc)
1492 {
1493     return get_string(((PyUnicodeErrorObject *)exc)->reason, "reason");
1494 }
1495
1496
1497 PyObject *
1498 PyUnicodeTranslateError_GetReason(PyObject *exc)
1499 {
1500     return get_string(((PyUnicodeErrorObject *)exc)->reason, "reason");
1501 }
1502
1503
1504 int
1505 PyUnicodeEncodeError_SetReason(PyObject *exc, const char *reason)
1506 {
1507     return set_string(&((PyUnicodeErrorObject *)exc)->reason, reason);
1508 }
1509
1510
1511 int
1512 PyUnicodeDecodeError_SetReason(PyObject *exc, const char *reason)
1513 {
1514     return set_string(&((PyUnicodeErrorObject *)exc)->reason, reason);
1515 }
1516
1517
1518 int
1519 PyUnicodeTranslateError_SetReason(PyObject *exc, const char *reason)
1520 {
1521     return set_string(&((PyUnicodeErrorObject *)exc)->reason, reason);
1522 }
1523
1524
1525 static int
1526 UnicodeError_init(PyUnicodeErrorObject *self, PyObject *args, PyObject *kwds,
1527                   PyTypeObject *objecttype)
1528 {
1529     Py_CLEAR(self->encoding);
1530     Py_CLEAR(self->object);
1531     Py_CLEAR(self->reason);
1532
1533     if (!PyArg_ParseTuple(args, "O!O!nnO!",
1534         &PyString_Type, &self->encoding,
1535         objecttype, &self->object,
1536         &self->start,
1537         &self->end,
1538         &PyString_Type, &self->reason)) {
1539         self->encoding = self->object = self->reason = NULL;
1540         return -1;
1541     }
1542
1543     Py_INCREF(self->encoding);
1544     Py_INCREF(self->object);
1545     Py_INCREF(self->reason);
1546
1547     return 0;
1548 }
1549
1550 static int
1551 UnicodeError_clear(PyUnicodeErrorObject *self)
1552 {
1553     Py_CLEAR(self->encoding);
1554     Py_CLEAR(self->object);
1555     Py_CLEAR(self->reason);
1556     return BaseException_clear((PyBaseExceptionObject *)self);
1557 }
1558
1559 static void
1560 UnicodeError_dealloc(PyUnicodeErrorObject *self)
1561 {
1562     _PyObject_GC_UNTRACK(self);
1563     UnicodeError_clear(self);
1564     Py_TYPE(self)->tp_free((PyObject *)self);
1565 }
1566
1567 static int
1568 UnicodeError_traverse(PyUnicodeErrorObject *self, visitproc visit, void *arg)
1569 {
1570     Py_VISIT(self->encoding);
1571     Py_VISIT(self->object);
1572     Py_VISIT(self->reason);
1573     return BaseException_traverse((PyBaseExceptionObject *)self, visit, arg);
1574 }
1575
1576 static PyMemberDef UnicodeError_members[] = {
1577     {"encoding", T_OBJECT, offsetof(PyUnicodeErrorObject, encoding), 0,
1578         PyDoc_STR("exception encoding")},
1579     {"object", T_OBJECT, offsetof(PyUnicodeErrorObject, object), 0,
1580         PyDoc_STR("exception object")},
1581     {"start", T_PYSSIZET, offsetof(PyUnicodeErrorObject, start), 0,
1582         PyDoc_STR("exception start")},
1583     {"end", T_PYSSIZET, offsetof(PyUnicodeErrorObject, end), 0,
1584         PyDoc_STR("exception end")},
1585     {"reason", T_OBJECT, offsetof(PyUnicodeErrorObject, reason), 0,
1586         PyDoc_STR("exception reason")},
1587     {NULL}  /* Sentinel */
1588 };
1589
1590
1591 /*
1592  *    UnicodeEncodeError extends UnicodeError
1593  */
1594
1595 static int
1596 UnicodeEncodeError_init(PyObject *self, PyObject *args, PyObject *kwds)
1597 {
1598     if (BaseException_init((PyBaseExceptionObject *)self, args, kwds) == -1)
1599         return -1;
1600     return UnicodeError_init((PyUnicodeErrorObject *)self, args,
1601                              kwds, &PyUnicode_Type);
1602 }
1603
1604 static PyObject *
1605 UnicodeEncodeError_str(PyObject *self)
1606 {
1607     PyUnicodeErrorObject *uself = (PyUnicodeErrorObject *)self;
1608
1609     if (uself->end==uself->start+1) {
1610         int badchar = (int)PyUnicode_AS_UNICODE(uself->object)[uself->start];
1611         char badchar_str[20];
1612         if (badchar <= 0xff)
1613             PyOS_snprintf(badchar_str, sizeof(badchar_str), "x%02x", badchar);
1614         else if (badchar <= 0xffff)
1615             PyOS_snprintf(badchar_str, sizeof(badchar_str), "u%04x", badchar);
1616         else
1617             PyOS_snprintf(badchar_str, sizeof(badchar_str), "U%08x", badchar);
1618         return PyString_FromFormat(
1619             "'%.400s' codec can't encode character u'\\%s' in position %zd: %.400s",
1620             PyString_AS_STRING(uself->encoding),
1621             badchar_str,
1622             uself->start,
1623             PyString_AS_STRING(uself->reason)
1624         );
1625     }
1626     return PyString_FromFormat(
1627         "'%.400s' codec can't encode characters in position %zd-%zd: %.400s",
1628         PyString_AS_STRING(uself->encoding),
1629         uself->start,
1630         uself->end-1,
1631         PyString_AS_STRING(uself->reason)
1632     );
1633 }
1634
1635 static PyTypeObject _PyExc_UnicodeEncodeError = {
1636     PyObject_HEAD_INIT(NULL)
1637     0,
1638     EXC_MODULE_NAME "UnicodeEncodeError",
1639     sizeof(PyUnicodeErrorObject), 0,
1640     (destructor)UnicodeError_dealloc, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1641     (reprfunc)UnicodeEncodeError_str, 0, 0, 0,
1642     Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,
1643     PyDoc_STR("Unicode encoding error."), (traverseproc)UnicodeError_traverse,
1644     (inquiry)UnicodeError_clear, 0, 0, 0, 0, 0, UnicodeError_members,
1645     0, &_PyExc_UnicodeError, 0, 0, 0, offsetof(PyUnicodeErrorObject, dict),
1646     (initproc)UnicodeEncodeError_init, 0, BaseException_new,
1647 };
1648 PyObject *PyExc_UnicodeEncodeError = (PyObject *)&_PyExc_UnicodeEncodeError;
1649
1650 PyObject *
1651 PyUnicodeEncodeError_Create(
1652     const char *encoding, const Py_UNICODE *object, Py_ssize_t length,
1653     Py_ssize_t start, Py_ssize_t end, const char *reason)
1654 {
1655     return PyObject_CallFunction(PyExc_UnicodeEncodeError, "su#nns",
1656                                  encoding, object, length, start, end, reason);
1657 }
1658
1659
1660 /*
1661  *    UnicodeDecodeError extends UnicodeError
1662  */
1663
1664 static int
1665 UnicodeDecodeError_init(PyObject *self, PyObject *args, PyObject *kwds)
1666 {
1667     if (BaseException_init((PyBaseExceptionObject *)self, args, kwds) == -1)
1668         return -1;
1669     return UnicodeError_init((PyUnicodeErrorObject *)self, args,
1670                              kwds, &PyString_Type);
1671 }
1672
1673 static PyObject *
1674 UnicodeDecodeError_str(PyObject *self)
1675 {
1676     PyUnicodeErrorObject *uself = (PyUnicodeErrorObject *)self;
1677
1678     if (uself->end==uself->start+1) {
1679         /* FromFormat does not support %02x, so format that separately */
1680         char byte[4];
1681         PyOS_snprintf(byte, sizeof(byte), "%02x",
1682                       ((int)PyString_AS_STRING(uself->object)[uself->start])&0xff);
1683         return PyString_FromFormat(
1684             "'%.400s' codec can't decode byte 0x%s in position %zd: %.400s",
1685             PyString_AS_STRING(uself->encoding),
1686             byte,
1687             uself->start,
1688             PyString_AS_STRING(uself->reason)
1689         );
1690     }
1691     return PyString_FromFormat(
1692         "'%.400s' codec can't decode bytes in position %zd-%zd: %.400s",
1693         PyString_AS_STRING(uself->encoding),
1694         uself->start,
1695         uself->end-1,
1696         PyString_AS_STRING(uself->reason)
1697     );
1698 }
1699
1700 static PyTypeObject _PyExc_UnicodeDecodeError = {
1701     PyObject_HEAD_INIT(NULL)
1702     0,
1703     EXC_MODULE_NAME "UnicodeDecodeError",
1704     sizeof(PyUnicodeErrorObject), 0,
1705     (destructor)UnicodeError_dealloc, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1706     (reprfunc)UnicodeDecodeError_str, 0, 0, 0,
1707     Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,
1708     PyDoc_STR("Unicode decoding error."), (traverseproc)UnicodeError_traverse,
1709     (inquiry)UnicodeError_clear, 0, 0, 0, 0, 0, UnicodeError_members,
1710     0, &_PyExc_UnicodeError, 0, 0, 0, offsetof(PyUnicodeErrorObject, dict),
1711     (initproc)UnicodeDecodeError_init, 0, BaseException_new,
1712 };
1713 PyObject *PyExc_UnicodeDecodeError = (PyObject *)&_PyExc_UnicodeDecodeError;
1714
1715 PyObject *
1716 PyUnicodeDecodeError_Create(
1717     const char *encoding, const char *object, Py_ssize_t length,
1718     Py_ssize_t start, Py_ssize_t end, const char *reason)
1719 {
1720     assert(length < INT_MAX);
1721     assert(start < INT_MAX);
1722     assert(end < INT_MAX);
1723     return PyObject_CallFunction(PyExc_UnicodeDecodeError, "ss#nns",
1724                                  encoding, object, length, start, end, reason);
1725 }
1726
1727
1728 /*
1729  *    UnicodeTranslateError extends UnicodeError
1730  */
1731
1732 static int
1733 UnicodeTranslateError_init(PyUnicodeErrorObject *self, PyObject *args,
1734                            PyObject *kwds)
1735 {
1736     if (BaseException_init((PyBaseExceptionObject *)self, args, kwds) == -1)
1737         return -1;
1738
1739     Py_CLEAR(self->object);
1740     Py_CLEAR(self->reason);
1741
1742     if (!PyArg_ParseTuple(args, "O!nnO!",
1743         &PyUnicode_Type, &self->object,
1744         &self->start,
1745         &self->end,
1746         &PyString_Type, &self->reason)) {
1747         self->object = self->reason = NULL;
1748         return -1;
1749     }
1750
1751     Py_INCREF(self->object);
1752     Py_INCREF(self->reason);
1753
1754     return 0;
1755 }
1756
1757
1758 static PyObject *
1759 UnicodeTranslateError_str(PyObject *self)
1760 {
1761     PyUnicodeErrorObject *uself = (PyUnicodeErrorObject *)self;
1762
1763     if (uself->end==uself->start+1) {
1764         int badchar = (int)PyUnicode_AS_UNICODE(uself->object)[uself->start];
1765         char badchar_str[20];
1766         if (badchar <= 0xff)
1767             PyOS_snprintf(badchar_str, sizeof(badchar_str), "x%02x", badchar);
1768         else if (badchar <= 0xffff)
1769             PyOS_snprintf(badchar_str, sizeof(badchar_str), "u%04x", badchar);
1770         else
1771             PyOS_snprintf(badchar_str, sizeof(badchar_str), "U%08x", badchar);
1772         return PyString_FromFormat(
1773             "can't translate character u'\\%s' in position %zd: %.400s",
1774             badchar_str,
1775             uself->start,
1776             PyString_AS_STRING(uself->reason)
1777         );
1778     }
1779     return PyString_FromFormat(
1780         "can't translate characters in position %zd-%zd: %.400s",
1781         uself->start,
1782         uself->end-1,
1783         PyString_AS_STRING(uself->reason)
1784     );
1785 }
1786
1787 static PyTypeObject _PyExc_UnicodeTranslateError = {
1788     PyObject_HEAD_INIT(NULL)
1789     0,
1790     EXC_MODULE_NAME "UnicodeTranslateError",
1791     sizeof(PyUnicodeErrorObject), 0,
1792     (destructor)UnicodeError_dealloc, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1793     (reprfunc)UnicodeTranslateError_str, 0, 0, 0,
1794     Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,
1795     PyDoc_STR("Unicode translation error."), (traverseproc)UnicodeError_traverse,
1796     (inquiry)UnicodeError_clear, 0, 0, 0, 0, 0, UnicodeError_members,
1797     0, &_PyExc_UnicodeError, 0, 0, 0, offsetof(PyUnicodeErrorObject, dict),
1798     (initproc)UnicodeTranslateError_init, 0, BaseException_new,
1799 };
1800 PyObject *PyExc_UnicodeTranslateError = (PyObject *)&_PyExc_UnicodeTranslateError;
1801
1802 PyObject *
1803 PyUnicodeTranslateError_Create(
1804     const Py_UNICODE *object, Py_ssize_t length,
1805     Py_ssize_t start, Py_ssize_t end, const char *reason)
1806 {
1807     return PyObject_CallFunction(PyExc_UnicodeTranslateError, "u#nns",
1808                                  object, length, start, end, reason);
1809 }
1810 #endif
1811
1812
1813 /*
1814  *    AssertionError extends StandardError
1815  */
1816 SimpleExtendsException(PyExc_StandardError, AssertionError,
1817                        "Assertion failed.");
1818
1819
1820 /*
1821  *    ArithmeticError extends StandardError
1822  */
1823 SimpleExtendsException(PyExc_StandardError, ArithmeticError,
1824                        "Base class for arithmetic errors.");
1825
1826
1827 /*
1828  *    FloatingPointError extends ArithmeticError
1829  */
1830 SimpleExtendsException(PyExc_ArithmeticError, FloatingPointError,
1831                        "Floating point operation failed.");
1832
1833
1834 /*
1835  *    OverflowError extends ArithmeticError
1836  */
1837 SimpleExtendsException(PyExc_ArithmeticError, OverflowError,
1838                        "Result too large to be represented.");
1839
1840
1841 /*
1842  *    ZeroDivisionError extends ArithmeticError
1843  */
1844 SimpleExtendsException(PyExc_ArithmeticError, ZeroDivisionError,
1845           "Second argument to a division or modulo operation was zero.");
1846
1847
1848 /*
1849  *    SystemError extends StandardError
1850  */
1851 SimpleExtendsException(PyExc_StandardError, SystemError,
1852     "Internal error in the Python interpreter.\n"
1853     "\n"
1854     "Please report this to the Python maintainer, along with the traceback,\n"
1855     "the Python version, and the hardware/OS platform and version.");
1856
1857
1858 /*
1859  *    ReferenceError extends StandardError
1860  */
1861 SimpleExtendsException(PyExc_StandardError, ReferenceError,
1862                        "Weak ref proxy used after referent went away.");
1863
1864
1865 /*
1866  *    MemoryError extends StandardError
1867  */
1868 SimpleExtendsException(PyExc_StandardError, MemoryError, "Out of memory.");
1869
1870 /*
1871  *    BufferError extends StandardError
1872  */
1873 SimpleExtendsException(PyExc_StandardError, BufferError, "Buffer error.");
1874
1875
1876 /* Warning category docstrings */
1877
1878 /*
1879  *    Warning extends Exception
1880  */
1881 SimpleExtendsException(PyExc_Exception, Warning,
1882                        "Base class for warning categories.");
1883
1884
1885 /*
1886  *    UserWarning extends Warning
1887  */
1888 SimpleExtendsException(PyExc_Warning, UserWarning,
1889                        "Base class for warnings generated by user code.");
1890
1891
1892 /*
1893  *    DeprecationWarning extends Warning
1894  */
1895 SimpleExtendsException(PyExc_Warning, DeprecationWarning,
1896                        "Base class for warnings about deprecated features.");
1897
1898
1899 /*
1900  *    PendingDeprecationWarning extends Warning
1901  */
1902 SimpleExtendsException(PyExc_Warning, PendingDeprecationWarning,
1903     "Base class for warnings about features which will be deprecated\n"
1904     "in the future.");
1905
1906
1907 /*
1908  *    SyntaxWarning extends Warning
1909  */
1910 SimpleExtendsException(PyExc_Warning, SyntaxWarning,
1911                        "Base class for warnings about dubious syntax.");
1912
1913
1914 /*
1915  *    RuntimeWarning extends Warning
1916  */
1917 SimpleExtendsException(PyExc_Warning, RuntimeWarning,
1918                  "Base class for warnings about dubious runtime behavior.");
1919
1920
1921 /*
1922  *    FutureWarning extends Warning
1923  */
1924 SimpleExtendsException(PyExc_Warning, FutureWarning,
1925     "Base class for warnings about constructs that will change semantically\n"
1926     "in the future.");
1927
1928
1929 /*
1930  *    ImportWarning extends Warning
1931  */
1932 SimpleExtendsException(PyExc_Warning, ImportWarning,
1933           "Base class for warnings about probable mistakes in module imports");
1934
1935
1936 /*
1937  *    UnicodeWarning extends Warning
1938  */
1939 SimpleExtendsException(PyExc_Warning, UnicodeWarning,
1940     "Base class for warnings about Unicode related problems, mostly\n"
1941     "related to conversion problems.");
1942
1943 /*
1944  *    BytesWarning extends Warning
1945  */
1946 SimpleExtendsException(PyExc_Warning, BytesWarning,
1947     "Base class for warnings about bytes and buffer related problems, mostly\n"
1948     "related to conversion from str or comparing to str.");
1949
1950 /* Pre-computed MemoryError instance.  Best to create this as early as
1951  * possible and not wait until a MemoryError is actually raised!
1952  */
1953 PyObject *PyExc_MemoryErrorInst=NULL;
1954
1955 /* Pre-computed RuntimeError instance for when recursion depth is reached.
1956    Meant to be used when normalizing the exception for exceeding the recursion
1957    depth will cause its own infinite recursion.
1958 */
1959 PyObject *PyExc_RecursionErrorInst = NULL;
1960
1961 /* module global functions */
1962 static PyMethodDef functions[] = {
1963     /* Sentinel */
1964     {NULL, NULL}
1965 };
1966
1967 #define PRE_INIT(TYPE) if (PyType_Ready(&_PyExc_ ## TYPE) < 0) \
1968     Py_FatalError("exceptions bootstrapping error.");
1969
1970 #define POST_INIT(TYPE) Py_INCREF(PyExc_ ## TYPE); \
1971     PyModule_AddObject(m, # TYPE, PyExc_ ## TYPE); \
1972     if (PyDict_SetItemString(bdict, # TYPE, PyExc_ ## TYPE)) \
1973         Py_FatalError("Module dictionary insertion problem.");
1974
1975
1976 PyMODINIT_FUNC
1977 _PyExc_Init(void)
1978 {
1979     PyObject *m, *bltinmod, *bdict;
1980
1981     PRE_INIT(BaseException)
1982     PRE_INIT(Exception)
1983     PRE_INIT(StandardError)
1984     PRE_INIT(TypeError)
1985     PRE_INIT(StopIteration)
1986     PRE_INIT(GeneratorExit)
1987     PRE_INIT(SystemExit)
1988     PRE_INIT(KeyboardInterrupt)
1989     PRE_INIT(ImportError)
1990     PRE_INIT(EnvironmentError)
1991     PRE_INIT(IOError)
1992     PRE_INIT(OSError)
1993 #ifdef MS_WINDOWS
1994     PRE_INIT(WindowsError)
1995 #endif
1996 #ifdef __VMS
1997     PRE_INIT(VMSError)
1998 #endif
1999     PRE_INIT(EOFError)
2000     PRE_INIT(RuntimeError)
2001     PRE_INIT(NotImplementedError)
2002     PRE_INIT(NameError)
2003     PRE_INIT(UnboundLocalError)
2004     PRE_INIT(AttributeError)
2005     PRE_INIT(SyntaxError)
2006     PRE_INIT(IndentationError)
2007     PRE_INIT(TabError)
2008     PRE_INIT(LookupError)
2009     PRE_INIT(IndexError)
2010     PRE_INIT(KeyError)
2011     PRE_INIT(ValueError)
2012     PRE_INIT(UnicodeError)
2013 #ifdef Py_USING_UNICODE
2014     PRE_INIT(UnicodeEncodeError)
2015     PRE_INIT(UnicodeDecodeError)
2016     PRE_INIT(UnicodeTranslateError)
2017 #endif
2018     PRE_INIT(AssertionError)
2019     PRE_INIT(ArithmeticError)
2020     PRE_INIT(FloatingPointError)
2021     PRE_INIT(OverflowError)
2022     PRE_INIT(ZeroDivisionError)
2023     PRE_INIT(SystemError)
2024     PRE_INIT(ReferenceError)
2025     PRE_INIT(MemoryError)
2026     PRE_INIT(BufferError)
2027     PRE_INIT(Warning)
2028     PRE_INIT(UserWarning)
2029     PRE_INIT(DeprecationWarning)
2030     PRE_INIT(PendingDeprecationWarning)
2031     PRE_INIT(SyntaxWarning)
2032     PRE_INIT(RuntimeWarning)
2033     PRE_INIT(FutureWarning)
2034     PRE_INIT(ImportWarning)
2035     PRE_INIT(UnicodeWarning)
2036     PRE_INIT(BytesWarning)
2037
2038     m = Py_InitModule4("exceptions", functions, exceptions_doc,
2039         (PyObject *)NULL, PYTHON_API_VERSION);
2040     if (m == NULL) return;
2041
2042     bltinmod = PyImport_ImportModule("__builtin__");
2043     if (bltinmod == NULL)
2044         Py_FatalError("exceptions bootstrapping error.");
2045     bdict = PyModule_GetDict(bltinmod);
2046     if (bdict == NULL)
2047         Py_FatalError("exceptions bootstrapping error.");
2048
2049     POST_INIT(BaseException)
2050     POST_INIT(Exception)
2051     POST_INIT(StandardError)
2052     POST_INIT(TypeError)
2053     POST_INIT(StopIteration)
2054     POST_INIT(GeneratorExit)
2055     POST_INIT(SystemExit)
2056     POST_INIT(KeyboardInterrupt)
2057     POST_INIT(ImportError)
2058     POST_INIT(EnvironmentError)
2059     POST_INIT(IOError)
2060     POST_INIT(OSError)
2061 #ifdef MS_WINDOWS
2062     POST_INIT(WindowsError)
2063 #endif
2064 #ifdef __VMS
2065     POST_INIT(VMSError)
2066 #endif
2067     POST_INIT(EOFError)
2068     POST_INIT(RuntimeError)
2069     POST_INIT(NotImplementedError)
2070     POST_INIT(NameError)
2071     POST_INIT(UnboundLocalError)
2072     POST_INIT(AttributeError)
2073     POST_INIT(SyntaxError)
2074     POST_INIT(IndentationError)
2075     POST_INIT(TabError)
2076     POST_INIT(LookupError)
2077     POST_INIT(IndexError)
2078     POST_INIT(KeyError)
2079     POST_INIT(ValueError)
2080     POST_INIT(UnicodeError)
2081 #ifdef Py_USING_UNICODE
2082     POST_INIT(UnicodeEncodeError)
2083     POST_INIT(UnicodeDecodeError)
2084     POST_INIT(UnicodeTranslateError)
2085 #endif
2086     POST_INIT(AssertionError)
2087     POST_INIT(ArithmeticError)
2088     POST_INIT(FloatingPointError)
2089     POST_INIT(OverflowError)
2090     POST_INIT(ZeroDivisionError)
2091     POST_INIT(SystemError)
2092     POST_INIT(ReferenceError)
2093     POST_INIT(MemoryError)
2094     POST_INIT(BufferError)
2095     POST_INIT(Warning)
2096     POST_INIT(UserWarning)
2097     POST_INIT(DeprecationWarning)
2098     POST_INIT(PendingDeprecationWarning)
2099     POST_INIT(SyntaxWarning)
2100     POST_INIT(RuntimeWarning)
2101     POST_INIT(FutureWarning)
2102     POST_INIT(ImportWarning)
2103     POST_INIT(UnicodeWarning)
2104     POST_INIT(BytesWarning)
2105
2106     PyExc_MemoryErrorInst = BaseException_new(&_PyExc_MemoryError, NULL, NULL);
2107     if (!PyExc_MemoryErrorInst)
2108         Py_FatalError("Cannot pre-allocate MemoryError instance");
2109
2110     PyExc_RecursionErrorInst = BaseException_new(&_PyExc_RuntimeError, NULL, NULL);
2111     if (!PyExc_RecursionErrorInst)
2112         Py_FatalError("Cannot pre-allocate RuntimeError instance for "
2113                         "recursion errors");
2114     else {
2115         PyBaseExceptionObject *err_inst =
2116             (PyBaseExceptionObject *)PyExc_RecursionErrorInst;
2117         PyObject *args_tuple;
2118         PyObject *exc_message;
2119         exc_message = PyString_FromString("maximum recursion depth exceeded");
2120         if (!exc_message)
2121             Py_FatalError("cannot allocate argument for RuntimeError "
2122                             "pre-allocation");
2123         args_tuple = PyTuple_Pack(1, exc_message);
2124         if (!args_tuple)
2125             Py_FatalError("cannot allocate tuple for RuntimeError "
2126                             "pre-allocation");
2127         Py_DECREF(exc_message);
2128         if (BaseException_init(err_inst, args_tuple, NULL))
2129             Py_FatalError("init of pre-allocated RuntimeError failed");
2130         Py_DECREF(args_tuple);
2131     }
2132
2133     Py_DECREF(bltinmod);
2134 }
2135
2136 void
2137 _PyExc_Fini(void)
2138 {
2139     Py_XDECREF(PyExc_MemoryErrorInst);
2140     PyExc_MemoryErrorInst = NULL;
2141 }