Doxygen.git - [no description]

diff options

author	Dimitri van Heesch <doxygen@gmail.com>	2020-12-14 21:14:23 (GMT)
committer	Dimitri van Heesch <doxygen@gmail.com>	2020-12-14 21:14:23 (GMT)
commit	233ab2f1878e84fcfc3a8735a9bf1e37643ac17d (patch)
tree	4f41316eb1714b3e691b68ad2f328d387afb4882 /doc/features.doc
parent	3c60691c7b611faaf22db08127ade6bd436720c2 (diff)
parent	30b7c73b8e9e8e46894c0993f6f7c310d8647ade (diff)
download	Doxygen-233ab2f1878e84fcfc3a8735a9bf1e37643ac17d.zip Doxygen-233ab2f1878e84fcfc3a8735a9bf1e37643ac17d.tar.gz Doxygen-233ab2f1878e84fcfc3a8735a9bf1e37643ac17d.tar.bz2

Merge branch 'master' of github.com:doxygen/doxygen

Diffstat (limited to 'doc/features.doc')

0 files changed, 0 insertions, 0 deletions

112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145


/* Error handling */

#include "Python.h"

#ifndef __STDC__
#ifndef MS_WINDOWS
extern char *strerror(int);
#endif
#endif

#ifdef MS_WINDOWS
#include <windows.h>
#include <winbase.h>
#endif

#include <ctype.h>

#ifdef __cplusplus
extern "C" {
#endif

_Py_IDENTIFIER(builtins);
_Py_IDENTIFIER(stderr);


void
PyErr_Restore(PyObject *type, PyObject *value, PyObject *traceback)
{
    PyThreadState *tstate = PyThreadState_GET();
    PyObject *oldtype, *oldvalue, *oldtraceback;

    if (traceback != NULL && !PyTraceBack_Check(traceback)) {
        /* XXX Should never happen -- fatal error instead? */
        /* Well, it could be None. */
        Py_DECREF(traceback);
        traceback = NULL;
    }

    /* Save these in locals to safeguard against recursive
       invocation through Py_XDECREF */
    oldtype = tstate->curexc_type;
    oldvalue = tstate->curexc_value;
    oldtraceback = tstate->curexc_traceback;

    tstate->curexc_type = type;
    tstate->curexc_value = value;
    tstate->curexc_traceback = traceback;

    Py_XDECREF(oldtype);
    Py_XDECREF(oldvalue);
    Py_XDECREF(oldtraceback);
}

static PyObject*
_PyErr_CreateException(PyObject *exception, PyObject *value)
{
    if (value == NULL || value == Py_None) {
        return _PyObject_CallNoArg(exception);
    }
    else if (PyTuple_Check(value)) {
        return PyObject_Call(exception, value, NULL);
    }
    else {
        return _PyObject_CallArg1(exception, value);
    }
}

void
PyErr_SetObject(PyObject *exception, PyObject *value)
{
    PyThreadState *tstate = PyThreadState_GET();
    PyObject *exc_value;
    PyObject *tb = NULL;

    if (exception != NULL &&
        !PyExceptionClass_Check(exception)) {
        PyErr_Format(PyExc_SystemError,
                     "exception %R not a BaseException subclass",
                     exception);
        return;
    }

    Py_XINCREF(value);
    exc_value = tstate->exc_value;
    if (exc_value != NULL && exc_value != Py_None) {
        /* Implicit exception chaining */
        Py_INCREF(exc_value);
        if (value == NULL || !PyExceptionInstance_Check(value)) {
            /* We must normalize the value right now */
            PyObject *fixed_value;

            /* Issue #23571: functions must not be called with an
               exception set */
            PyErr_Clear();

            fixed_value = _PyErr_CreateException(exception, value);
            Py_XDECREF(value);
            if (fixed_value == NULL) {
                return;
            }

            value = fixed_value;
        }

        /* Avoid reference cycles through the context chain.
           This is O(chain length) but context chains are
           usually very short. Sensitive readers may try
           to inline the call to PyException_GetContext. */
        if (exc_value != value) {
            PyObject *o = exc_value, *context;
            while ((context = PyException_GetContext(o))) {
                Py_DECREF(context);
                if (context == value) {
                    PyException_SetContext(o, NULL);
                    break;
                }
                o = context;
            }
            PyException_SetContext(value, exc_value);
        }
        else {
            Py_DECREF(exc_value);
        }
    }
    if (value != NULL && PyExceptionInstance_Check(value))
        tb = PyException_GetTraceback(value);
    Py_XINCREF(exception);
    PyErr_Restore(exception, value, tb);
}

/* Set a key error with the specified argument, wrapping it in a
 * tuple automatically so that tuple keys are not unpacked as the
 * exception arguments. */
void
_PyErr_SetKeyError(PyObject *arg)
{
    PyObject *tup;
    tup = PyTuple_Pack(1, arg);
    if (!tup)
        return; /* caller will expect error to be set anyway */
    PyErr_SetObject(PyExc_KeyError, tup);
    Py_DECREF(tup);
}

void
PyErr_SetNone(PyObject *exception)
{
    PyErr_SetObject(exception, (PyObject *)NULL);
}

void
PyErr_SetString(PyObject *exception, const char *string)
{
    PyObject *value = PyUnicode_FromString(string);
    PyErr_SetObject(exception, value);
    Py_XDECREF(value);
}


PyObject *
PyErr_Occurred(void)
{
    PyThreadState *tstate = _PyThreadState_UncheckedGet();
    return tstate == NULL ? NULL : tstate->curexc_type;
}


int
PyErr_GivenExceptionMatches(PyObject *err, PyObject *exc)
{
    if (err == NULL || exc == NULL) {
        /* maybe caused by "import exceptions" that failed early on */
        return 0;
    }
    if (PyTuple_Check(exc)) {
        Py_ssize_t i, n;
        n = PyTuple_Size(exc);
        for (i = 0; i < n; i++) {
            /* Test recursively */
             if (PyErr_GivenExceptionMatches(
                 err, PyTuple_GET_ITEM(exc, i)))
             {
                 return 1;
             }
        }
        return 0;
    }
    /* err might be an instance, so check its class. */
    if (PyExceptionInstance_Check(err))
        err = PyExceptionInstance_Class(err);

    if (PyExceptionClass_Check(err) && PyExceptionClass_Check(exc)) {
        int res = 0;
        PyObject *exception, *value, *tb;
        PyErr_Fetch(&exception, &value, &tb);
        /* PyObject_IsSubclass() can recurse and therefore is
           not safe (see test_bad_getattr in test.pickletester). */
        res = PyType_IsSubtype((PyTypeObject *)err, (PyTypeObject *)exc);
        /* This function must not fail, so print the error here */
        if (res == -1) {
            PyErr_WriteUnraisable(err);
            res = 0;
        }
        PyErr_Restore(exception, value, tb);
        return res;
    }

    return err == exc;
}


int
PyErr_ExceptionMatches(PyObject *exc)
{
    return PyErr_GivenExceptionMatches(PyErr_Occurred(), exc);
}


/* Used in many places to normalize a raised exception, including in
   eval_code2(), do_raise(), and PyErr_Print()

   XXX: should PyErr_NormalizeException() also call
            PyException_SetTraceback() with the resulting value and tb?
*/
void
PyErr_NormalizeException(PyObject **exc, PyObject **val, PyObject **tb)
{
    PyObject *type = *exc;
    PyObject *value = *val;
    PyObject *inclass = NULL;
    PyObject *initial_tb = NULL;
    PyThreadState *tstate = NULL;

    if (type == NULL) {
        /* There was no exception, so nothing to do. */
        return;
    }

    /* If PyErr_SetNone() was used, the value will have been actually
       set to NULL.
    */
    if (!value) {
        value = Py_None;
        Py_INCREF(value);
    }

    if (PyExceptionInstance_Check(value))
        inclass = PyExceptionInstance_Class(value);

    /* Normalize the exception so that if the type is a class, the
       value will be an instance.
    */
    if (PyExceptionClass_Check(type)) {
        int is_subclass;
        if (inclass) {
            is_subclass = PyObject_IsSubclass(inclass, type);
            if (is_subclass < 0)
                goto finally;
        }
        else
            is_subclass = 0;

        /* if the value was not an instance, or is not an instance
           whose class is (or is derived from) type, then use the
           value as an argument to instantiation of the type
           class.
        */
        if (!inclass || !is_subclass) {
            PyObject *fixed_value;

            fixed_value = _PyErr_CreateException(type, value);
            if (fixed_value == NULL) {
                goto finally;
            }

            Py_DECREF(value);
            value = fixed_value;
        }
        /* if the class of the instance doesn't exactly match the
           class of the type, believe the instance
        */
        else if (inclass != type) {
            Py_DECREF(type);
            type = inclass;
            Py_INCREF(type);
        }
    }
    *exc = type;
    *val = value;
    return;
finally:
    Py_DECREF(type);
    Py_DECREF(value);
    /* If the new exception doesn't set a traceback and the old
       exception had a traceback, use the old traceback for the
       new exception.  It's better than nothing.
    */
    initial_tb = *tb;
    PyErr_Fetch(exc, val, tb);
    if (initial_tb != NULL) {
        if (*tb == NULL)
            *tb = initial_tb;
        else
            Py_DECREF(initial_tb);
    }
    /* normalize recursively */
    tstate = PyThreadState_GET();
    if (++tstate->recursion_depth > Py_GetRecursionLimit()) {
        --tstate->recursion_depth;
        /* throw away the old exception and use the recursion error instead */
        Py_INCREF(PyExc_RecursionError);
        Py_SETREF(*exc, PyExc_RecursionError);
        Py_INCREF(PyExc_RecursionErrorInst);
        Py_SETREF(*val, PyExc_RecursionErrorInst);
        /* just keeping the old traceback */
        return;
    }
    PyErr_NormalizeException(exc, val, tb);
    --tstate->recursion_depth;
}


void
PyErr_Fetch(PyObject **p_type, PyObject **p_value, PyObject **p_traceback)
{
    PyThreadState *tstate = PyThreadState_GET();

    *p_type = tstate->curexc_type;
    *p_value = tstate->curexc_value;
    *p_traceback = tstate->curexc_traceback;

    tstate->curexc_type = NULL;
    tstate->curexc_value = NULL;
    tstate->curexc_traceback = NULL;
}

void
PyErr_Clear(void)
{
    PyErr_Restore(NULL, NULL, NULL);
}

void
PyErr_GetExcInfo(PyObject **p_type, PyObject **p_value, PyObject **p_traceback)
{
    PyThreadState *tstate = PyThreadState_GET();

    *p_type = tstate->exc_type;
    *p_value = tstate->exc_value;
    *p_traceback = tstate->exc_traceback;

    Py_XINCREF(*p_type);
    Py_XINCREF(*p_value);
    Py_XINCREF(*p_traceback);
}

void
PyErr_SetExcInfo(PyObject *p_type, PyObject *p_value, PyObject *p_traceback)
{
    PyObject *oldtype, *oldvalue, *oldtraceback;
    PyThreadState *tstate = PyThreadState_GET();

    oldtype = tstate->exc_type;
    oldvalue = tstate->exc_value;
    oldtraceback = tstate->exc_traceback;

    tstate->exc_type = p_type;
    tstate->exc_value = p_value;
    tstate->exc_traceback = p_traceback;

    Py_XDECREF(oldtype);
    Py_XDECREF(oldvalue);
    Py_XDECREF(oldtraceback);
}

/* Like PyErr_Restore(), but if an exception is already set,
   set the context associated with it.
 */
void
_PyErr_ChainExceptions(PyObject *exc, PyObject *val, PyObject *tb)
{
    if (exc == NULL)
        return;

    if (PyErr_Occurred()) {
        PyObject *exc2, *val2, *tb2;
        PyErr_Fetch(&exc2, &val2, &tb2);
        PyErr_NormalizeException(&exc, &val, &tb);
        Py_DECREF(exc);
        Py_XDECREF(tb);
        PyErr_NormalizeException(&exc2, &val2, &tb2);
        PyException_SetContext(val2, val);
        PyErr_Restore(exc2, val2, tb2);
    }
    else {
        PyErr_Restore(exc, val, tb);
    }
}

/* Convenience functions to set a type error exception and return 0 */

int
PyErr_BadArgument(void)
{
    PyErr_SetString(PyExc_TypeError,
                    "bad argument type for built-in operation");
    return 0;
}

PyObject *
PyErr_NoMemory(void)
{
    if (Py_TYPE(PyExc_MemoryError) == NULL) {
        /* PyErr_NoMemory() has been called before PyExc_MemoryError has been
           initialized by _PyExc_Init() */
        Py_FatalError("Out of memory and PyExc_MemoryError is not "
                      "initialized yet");
    }
    PyErr_SetNone(PyExc_MemoryError);
    return NULL;
}

PyObject *
PyErr_SetFromErrnoWithFilenameObject(PyObject *exc, PyObject *filenameObject)
{
    return PyErr_SetFromErrnoWithFilenameObjects(exc, filenameObject, NULL);
}

PyObject *
PyErr_SetFromErrnoWithFilenameObjects(PyObject *exc, PyObject *filenameObject, PyObject *filenameObject2)
{
    PyObject *message;
    PyObject *v, *args;
    int i = errno;
#ifdef MS_WINDOWS
    WCHAR *s_buf = NULL;
#endif /* Unix/Windows */

#ifdef EINTR
    if (i == EINTR && PyErr_CheckSignals())
        return NULL;
#endif

#ifndef MS_WINDOWS
    if (i != 0) {
        char *s = strerror(i);
        message = PyUnicode_DecodeLocale(s, "surrogateescape");
    }
    else {
        /* Sometimes errno didn't get set */
        message = PyUnicode_FromString("Error");
    }
#else
    if (i == 0)
        message = PyUnicode_FromString("Error"); /* Sometimes errno didn't get set */
    else
    {
        /* Note that the Win32 errors do not lineup with the
           errno error.  So if the error is in the MSVC error
           table, we use it, otherwise we assume it really _is_
           a Win32 error code
        */
        if (i > 0 && i < _sys_nerr) {
            message = PyUnicode_FromString(_sys_errlist[i]);
        }
        else {
            int len = FormatMessageW(
                FORMAT_MESSAGE_ALLOCATE_BUFFER |
                FORMAT_MESSAGE_FROM_SYSTEM |
                FORMAT_MESSAGE_IGNORE_INSERTS,
                NULL,                   /* no message source */
                i,
                MAKELANGID(LANG_NEUTRAL,
                           SUBLANG_DEFAULT),
                           /* Default language */
                (LPWSTR) &s_buf,
                0,                      /* size not used */
                NULL);                  /* no args */
            if (len==0) {
                /* Only ever seen this in out-of-mem
                   situations */
                s_buf = NULL;
                message = PyUnicode_FromFormat("Windows Error 0x%x", i);
            } else {
                /* remove trailing cr/lf and dots */
                while (len > 0 && (s_buf[len-1] <= L' ' || s_buf[len-1] == L'.'))
                    s_buf[--len] = L'\0';
                message = PyUnicode_FromWideChar(s_buf, len);
            }
        }
    }
#endif /* Unix/Windows */

    if (message == NULL)
    {
#ifdef MS_WINDOWS
        LocalFree(s_buf);
#endif
        return NULL;
    }

    if (filenameObject != NULL) {
        if (filenameObject2 != NULL)
            args = Py_BuildValue("(iOOiO)", i, message, filenameObject, 0, filenameObject2);
        else
            args = Py_BuildValue("(iOO)", i, message, filenameObject);
    } else {
        assert(filenameObject2 == NULL);
        args = Py_BuildValue("(iO)", i, message);
    }
    Py_DECREF(message);

    if (args != NULL) {
        v = PyObject_Call(exc, args, NULL);
        Py_DECREF(args);
        if (v != NULL) {
            PyErr_SetObject((PyObject *) Py_TYPE(v), v);
            Py_DECREF(v);
        }
    }
#ifdef MS_WINDOWS
    LocalFree(s_buf);
#endif
    return NULL;
}

PyObject *
PyErr_SetFromErrnoWithFilename(PyObject *exc, const char *filename)
{
    PyObject *name = filename ? PyUnicode_DecodeFSDefault(filename) : NULL;
    PyObject *result = PyErr_SetFromErrnoWithFilenameObjects(exc, name, NULL);
    Py_XDECREF(name);
    return result;
}

#ifdef MS_WINDOWS
PyObject *
PyErr_SetFromErrnoWithUnicodeFilename(PyObject *exc, const Py_UNICODE *filename)
{
    PyObject *name = filename ?
                     PyUnicode_FromUnicode(filename, wcslen(filename)) :
             NULL;
    PyObject *result = PyErr_SetFromErrnoWithFilenameObjects(exc, name, NULL);
    Py_XDECREF(name);
    return result;
}
#endif /* MS_WINDOWS */

PyObject *
PyErr_SetFromErrno(PyObject *exc)
{
    return PyErr_SetFromErrnoWithFilenameObjects(exc, NULL, NULL);
}

#ifdef MS_WINDOWS
/* Windows specific error code handling */
PyObject *PyErr_SetExcFromWindowsErrWithFilenameObject(
    PyObject *exc,
    int ierr,
    PyObject *filenameObject)
{
    return PyErr_SetExcFromWindowsErrWithFilenameObjects(exc, ierr,
        filenameObject, NULL);
}

PyObject *PyErr_SetExcFromWindowsErrWithFilenameObjects(
    PyObject *exc,
    int ierr,
    PyObject *filenameObject,
    PyObject *filenameObject2)
{
    int len;
    WCHAR *s_buf = NULL; /* Free via LocalFree */
    PyObject *message;
    PyObject *args, *v;
    DWORD err = (DWORD)ierr;
    if (err==0) err = GetLastError();
    len = FormatMessageW(
        /* Error API error */
        FORMAT_MESSAGE_ALLOCATE_BUFFER |
        FORMAT_MESSAGE_FROM_SYSTEM |
        FORMAT_MESSAGE_IGNORE_INSERTS,
        NULL,           /* no message source */
        err,
        MAKELANGID(LANG_NEUTRAL,
        SUBLANG_DEFAULT), /* Default language */
        (LPWSTR) &s_buf,
        0,              /* size not used */
        NULL);          /* no args */
    if (len==0) {
        /* Only seen this in out of mem situations */
        message = PyUnicode_FromFormat("Windows Error 0x%x", err);
        s_buf = NULL;
    } else {
        /* remove trailing cr/lf and dots */
        while (len > 0 && (s_buf[len-1] <= L' ' || s_buf[len-1] == L'.'))
            s_buf[--len] = L'\0';
        message = PyUnicode_FromWideChar(s_buf, len);
    }

    if (message == NULL)
    {
        LocalFree(s_buf);
        return NULL;
    }

    if (filenameObject == NULL) {
        assert(filenameObject2 == NULL);
        filenameObject = filenameObject2 = Py_None;
    }
    else if (filenameObject2 == NULL)
        filenameObject2 = Py_None;
    /* This is the constructor signature for OSError.
       The POSIX translation will be figured out by the constructor. */
    args = Py_BuildValue("(iOOiO)", 0, message, filenameObject, err, filenameObject2);
    Py_DECREF(message);

    if (args != NULL) {
        v = PyObject_Call(exc, args, NULL);
        Py_DECREF(args);
        if (v != NULL) {
            PyErr_SetObject((PyObject *) Py_TYPE(v), v);
            Py_DECREF(v);
        }
    }
    LocalFree(s_buf);
    return NULL;
}

PyObject *PyErr_SetExcFromWindowsErrWithFilename(
    PyObject *exc,
    int ierr,
    const char *filename)
{
    PyObject *name = filename ? PyUnicode_DecodeFSDefault(filename) : NULL;
    PyObject *ret = PyErr_SetExcFromWindowsErrWithFilenameObjects(exc,
                                                                 ierr,
                                                                 name,
                                                                 NULL);
    Py_XDECREF(name);
    return ret;
}

PyObject *PyErr_SetExcFromWindowsErrWithUnicodeFilename(
    PyObject *exc,
    int ierr,
    const Py_UNICODE *filename)
{
    PyObject *name = filename ?
                     PyUnicode_FromUnicode(filename, wcslen(filename)) :
             NULL;
    PyObject *ret = PyErr_SetExcFromWindowsErrWithFilenameObjects(exc,
                                                                 ierr,
                                                                 name,
                                                                 NULL);
    Py_XDECREF(name);
    return ret;
}

PyObject *PyErr_SetExcFromWindowsErr(PyObject *exc, int ierr)
{
    return PyErr_SetExcFromWindowsErrWithFilename(exc, ierr, NULL);
}

PyObject *PyErr_SetFromWindowsErr(int ierr)
{
    return PyErr_SetExcFromWindowsErrWithFilename(PyExc_OSError,
                                                  ierr, NULL);
}

PyObject *PyErr_SetFromWindowsErrWithFilename(
    int ierr,
    const char *filename)
{
    PyObject *name = filename ? PyUnicode_DecodeFSDefault(filename) : NULL;
    PyObject *result = PyErr_SetExcFromWindowsErrWithFilenameObjects(
                                                  PyExc_OSError,
                                                  ierr, name, NULL);
    Py_XDECREF(name);
    return result;
}

PyObject *PyErr_SetFromWindowsErrWithUnicodeFilename(
    int ierr,
    const Py_UNICODE *filename)
{
    PyObject *name = filename ?
                     PyUnicode_FromUnicode(filename, wcslen(filename)) :
             NULL;
    PyObject *result = PyErr_SetExcFromWindowsErrWithFilenameObjects(
                                                  PyExc_OSError,
                                                  ierr, name, NULL);
    Py_XDECREF(name);
    return result;
}
#endif /* MS_WINDOWS */

PyObject *
PyErr_SetImportErrorSubclass(PyObject *exception, PyObject *msg,
    PyObject *name, PyObject *path)
{
    int issubclass;
    PyObject *kwargs, *error;

    issubclass = PyObject_IsSubclass(exception, PyExc_ImportError);
    if (issubclass < 0) {
        return NULL;
    }
    else if (!issubclass) {
        PyErr_SetString(PyExc_TypeError, "expected a subclass of ImportError");
        return NULL;
    }

    if (msg == NULL) {
        PyErr_SetString(PyExc_TypeError, "expected a message argument");
        return NULL;
    }

    if (name == NULL) {
        name = Py_None;
    }
    if (path == NULL) {
        path = Py_None;
    }

    kwargs = PyDict_New();
    if (kwargs == NULL) {
        return NULL;
    }
    if (PyDict_SetItemString(kwargs, "name", name) < 0) {
        goto done;
    }
    if (PyDict_SetItemString(kwargs, "path", path) < 0) {
        goto done;
    }

    error = _PyObject_FastCallDict(exception, &msg, 1, kwargs);
    if (error != NULL) {
        PyErr_SetObject((PyObject *)Py_TYPE(error), error);
        Py_DECREF(error);
    }

done:
    Py_DECREF(kwargs);
    return NULL;
}

PyObject *
PyErr_SetImportError(PyObject *msg, PyObject *name, PyObject *path)
{
    return PyErr_SetImportErrorSubclass(PyExc_ImportError, msg, name, path);
}

void
_PyErr_BadInternalCall(const char *filename, int lineno)
{
    PyErr_Format(PyExc_SystemError,
                 "%s:%d: bad argument to internal function",
                 filename, lineno);
}

/* Remove the preprocessor macro for PyErr_BadInternalCall() so that we can
   export the entry point for existing object code: */
#undef PyErr_BadInternalCall
void
PyErr_BadInternalCall(void)
{
    assert(0 && "bad argument to internal function");
    PyErr_Format(PyExc_SystemError,
                 "bad argument to internal function");
}
#define PyErr_BadInternalCall() _PyErr_BadInternalCall(__FILE__, __LINE__)


PyObject *
PyErr_FormatV(PyObject *exception, const char *format, va_list vargs)
{
    PyObject* string;

    /* Issue #23571: PyUnicode_FromFormatV() must not be called with an
       exception set, it calls arbitrary Python code like PyObject_Repr() */
    PyErr_Clear();

    string = PyUnicode_FromFormatV(format, vargs);

    PyErr_SetObject(exception, string);
    Py_XDECREF(string);
    return NULL;
}


PyObject *
PyErr_Format(PyObject *exception, const char *format, ...)
{
    va_list vargs;
#ifdef HAVE_STDARG_PROTOTYPES
    va_start(vargs, format);
#else
    va_start(vargs);
#endif
    PyErr_FormatV(exception, format, vargs);
    va_end(vargs);
    return NULL;
}


PyObject *
PyErr_NewException(const char *name, PyObject *base, PyObject *dict)
{
    const char *dot;
    PyObject *modulename = NULL;
    PyObject *classname = NULL;
    PyObject *mydict = NULL;
    PyObject *bases = NULL;
    PyObject *result = NULL;
    dot = strrchr(name, '.');
    if (dot == NULL) {
        PyErr_SetString(PyExc_SystemError,
            "PyErr_NewException: name must be module.class");
        return NULL;
    }
    if (base == NULL)
        base = PyExc_Exception;
    if (dict == NULL) {
        dict = mydict = PyDict_New();
        if (dict == NULL)
            goto failure;
    }
    if (PyDict_GetItemString(dict, "__module__") == NULL) {
        modulename = PyUnicode_FromStringAndSize(name,
                                             (Py_ssize_t)(dot-name));
        if (modulename == NULL)
            goto failure;
        if (PyDict_SetItemString(dict, "__module__", modulename) != 0)
            goto failure;
    }
    if (PyTuple_Check(base)) {
        bases = base;
        /* INCREF as we create a new ref in the else branch */
        Py_INCREF(bases);
    } else {
        bases = PyTuple_Pack(1, base);
        if (bases == NULL)
            goto failure;
    }
    /* Create a real class. */
    result = PyObject_CallFunction((PyObject *)&PyType_Type, "sOO",
                                   dot+1, bases, dict);
  failure:
    Py_XDECREF(bases);
    Py_XDECREF(mydict);
    Py_XDECREF(classname);
    Py_XDECREF(modulename);
    return result;
}


/* Create an exception with docstring */
PyObject *
PyErr_NewExceptionWithDoc(const char *name, const char *doc,
                          PyObject *base, PyObject *dict)
{
    int result;
    PyObject *ret = NULL;
    PyObject *mydict = NULL; /* points to the dict only if we create it */
    PyObject *docobj;

    if (dict == NULL) {
        dict = mydict = PyDict_New();
        if (dict == NULL) {
            return NULL;
        }
    }

    if (doc != NULL) {
        docobj = PyUnicode_FromString(doc);
        if (docobj == NULL)
            goto failure;
        result = PyDict_SetItemString(dict, "__doc__", docobj);
        Py_DECREF(docobj);
        if (result < 0)
            goto failure;
    }

    ret = PyErr_NewException(name, base, dict);
  failure:
    Py_XDECREF(mydict);
    return ret;
}


/* Call when an exception has occurred but there is no way for Python
   to handle it.  Examples: exception in __del__ or during GC. */
void
PyErr_WriteUnraisable(PyObject *obj)
{
    _Py_IDENTIFIER(__module__);
    PyObject *f, *t, *v, *tb;
    PyObject *moduleName = NULL;
    char* className;

    PyErr_Fetch(&t, &v, &tb);

    f = _PySys_GetObjectId(&PyId_stderr);
    if (f == NULL || f == Py_None)
        goto done;

    if (obj) {
        if (PyFile_WriteString("Exception ignored in: ", f) < 0)
            goto done;
        if (PyFile_WriteObject(obj, f, 0) < 0) {
            PyErr_Clear();
            if (PyFile_WriteString("<object repr() failed>", f) < 0) {
                goto done;
            }
        }
        if (PyFile_WriteString("\n", f) < 0)
            goto done;
    }

    if (PyTraceBack_Print(tb, f) < 0)
        goto done;

    if (!t)
        goto done;

    assert(PyExceptionClass_Check(t));
    className = PyExceptionClass_Name(t);
    if (className != NULL) {
        char *dot = strrchr(className, '.');
        if (dot != NULL)
            className = dot+1;
    }

    moduleName = _PyObject_GetAttrId(t, &PyId___module__);
    if (moduleName == NULL) {
        PyErr_Clear();
        if (PyFile_WriteString("<unknown>", f) < 0)
            goto done;
    }
    else {
        if (_PyUnicode_CompareWithId(moduleName, &PyId_builtins) != 0) {
            if (PyFile_WriteObject(moduleName, f, Py_PRINT_RAW) < 0)
                goto done;
            if (PyFile_WriteString(".", f) < 0)
                goto done;
        }
    }
    if (className == NULL) {
        if (PyFile_WriteString("<unknown>", f) < 0)
            goto done;
    }
    else {
        if (PyFile_WriteString(className, f) < 0)
            goto done;
    }

    if (v && v != Py_None) {
        if (PyFile_WriteString(": ", f) < 0)
            goto done;
        if (PyFile_WriteObject(v, f, Py_PRINT_RAW) < 0) {
            PyErr_Clear();
            if (PyFile_WriteString("<exception str() failed>", f) < 0) {
                goto done;
            }
        }
    }
    if (PyFile_WriteString("\n", f) < 0)
        goto done;

done:
    Py_XDECREF(moduleName);
    Py_XDECREF(t);
    Py_XDECREF(v);
    Py_XDECREF(tb);
    PyErr_Clear(); /* Just in case */
}

extern PyObject *PyModule_GetWarningsModule(void);


void
PyErr_SyntaxLocation(const char *filename, int lineno)
{
    PyErr_SyntaxLocationEx(filename, lineno, -1);
}


/* Set file and line information for the current exception.
   If the exception is not a SyntaxError, also sets additional attributes
   to make printing of exceptions believe it is a syntax error. */

void
PyErr_SyntaxLocationObject(PyObject *filename, int lineno, int col_offset)
{
    PyObject *exc, *v, *tb, *tmp;
    _Py_IDENTIFIER(filename);
    _Py_IDENTIFIER(lineno);
    _Py_IDENTIFIER(msg);
    _Py_IDENTIFIER(offset);
    _Py_IDENTIFIER(print_file_and_line);
    _Py_IDENTIFIER(text);

    /* add attributes for the line number and filename for the error */
    PyErr_Fetch(&exc, &v, &tb);
    PyErr_NormalizeException(&exc, &v, &tb);
    /* XXX check that it is, indeed, a syntax error. It might not
     * be, though. */
    tmp = PyLong_FromLong(lineno);
    if (tmp == NULL)
        PyErr_Clear();
    else {
        if (_PyObject_SetAttrId(v, &PyId_lineno, tmp))
            PyErr_Clear();
        Py_DECREF(tmp);
    }
    if (col_offset >= 0) {
        tmp = PyLong_FromLong(col_offset);
        if (tmp == NULL)
            PyErr_Clear();
        else {
            if (_PyObject_SetAttrId(v, &PyId_offset, tmp))
                PyErr_Clear();
            Py_DECREF(tmp);
        }
    }
    if (filename != NULL) {
        if (_PyObject_SetAttrId(v, &PyId_filename, filename))
            PyErr_Clear();

        tmp = PyErr_ProgramTextObject(filename, lineno);
        if (tmp) {
            if (_PyObject_SetAttrId(v, &PyId_text, tmp))
                PyErr_Clear();
            Py_DECREF(tmp);
        }
    }
    if (_PyObject_SetAttrId(v, &PyId_offset, Py_None)) {
        PyErr_Clear();
    }
    if (exc != PyExc_SyntaxError) {
        if (!_PyObject_HasAttrId(v, &PyId_msg)) {
            tmp = PyObject_Str(v);
            if (tmp) {
                if (_PyObject_SetAttrId(v, &PyId_msg, tmp))
                    PyErr_Clear();
                Py_DECREF(tmp);
            } else {
                PyErr_Clear();
            }
        }
        if (!_PyObject_HasAttrId(v, &PyId_print_file_and_line)) {
            if (_PyObject_SetAttrId(v, &PyId_print_file_and_line,
                                    Py_None))
                PyErr_Clear();
        }
    }
    PyErr_Restore(exc, v, tb);
}

void
PyErr_SyntaxLocationEx(const char *filename, int lineno, int col_offset)
{
    PyObject *fileobj;
    if (filename != NULL) {
        fileobj = PyUnicode_DecodeFSDefault(filename);
        if (fileobj == NULL)
            PyErr_Clear();
    }
    else
        fileobj = NULL;
    PyErr_SyntaxLocationObject(fileobj, lineno, col_offset);
    Py_XDECREF(fileobj);
}

/* Attempt to load the line of text that the exception refers to.  If it
   fails, it will return NULL but will not set an exception.

   XXX The functionality of this function is quite similar to the
   functionality in tb_displayline() in traceback.c. */

static PyObject *
err_programtext(FILE *fp, int lineno)
{
    int i;
    char linebuf[1000];

    if (fp == NULL)
        return NULL;
    for (i = 0; i < lineno; i++) {
        char *pLastChar = &linebuf[sizeof(linebuf) - 2];
        do {
            *pLastChar = '\0';
            if (Py_UniversalNewlineFgets(linebuf, sizeof linebuf,
                                         fp, NULL) == NULL)
                break;
            /* fgets read *something*; if it didn't get as
               far as pLastChar, it must have found a newline
               or hit the end of the file; if pLastChar is \n,
               it obviously found a newline; else we haven't
               yet seen a newline, so must continue */
        } while (*pLastChar != '\0' && *pLastChar != '\n');
    }
    fclose(fp);
    if (i == lineno) {
        char *p = linebuf;
        PyObject *res;
        while (*p == ' ' || *p == '\t' || *p == '\014')
            p++;
        res = PyUnicode_FromString(p);
        if (res == NULL)
            PyErr_Clear();
        return res;
    }
    return NULL;
}

PyObject *
PyErr_ProgramText(const char *filename, int lineno)
{
    FILE *fp;
    if (filename == NULL || *filename == '\0' || lineno <= 0)
        return NULL;
    fp = _Py_fopen(filename, "r" PY_STDIOTEXTMODE);
    return err_programtext(fp, lineno);
}

PyObject *
PyErr_ProgramTextObject(PyObject *filename, int lineno)
{
    FILE *fp;
    if (filename == NULL || lineno <= 0)
        return NULL;
    fp = _Py_fopen_obj(filename, "r" PY_STDIOTEXTMODE);
    if (fp == NULL) {
        PyErr_Clear();
        return NULL;
    }
    return err_programtext(fp, lineno);
}

#ifdef __cplusplus
}
#endif


context:
space:
mode: