Repository navigation
Expand file tree
/
Copy pathmodsupport.c
More file actions
800 lines (723 loc) · 20.3 KB
/
Copy pathmodsupport.c
File metadata and controls
800 lines (723 loc) · 20.3 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
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
/* Module support implementation */
#include "Python.h"
#include "pycore_abstract.h" // _PyIndex_Check()
#include "pycore_object.h" // _PyType_IsReady()
#include "pycore_unicodeobject.h" // _PyUnicodeWriter_FormatV()
typedef double va_double;
static PyObject *va_build_value(const char *, va_list);
int
_Py_convert_optional_to_ssize_t(PyObject *obj, void *result)
{
Py_ssize_t limit;
if (obj == Py_None) {
return 1;
}
else if (_PyIndex_Check(obj)) {
limit = PyNumber_AsSsize_t(obj, PyExc_OverflowError);
if (limit == -1 && PyErr_Occurred()) {
return 0;
}
}
else {
PyErr_Format(PyExc_TypeError,
"argument should be integer or None, not '%.200s'",
Py_TYPE(obj)->tp_name);
return 0;
}
*((Py_ssize_t *)result) = limit;
return 1;
}
int
_Py_convert_optional_to_non_negative_ssize_t(PyObject *obj, void *result)
{
if (!_Py_convert_optional_to_ssize_t(obj, result)) {
return 0;
}
if (obj != Py_None && *((Py_ssize_t *)result) < 0) {
PyErr_SetString(PyExc_ValueError, "argument cannot be negative");
return 0;
}
return 1;
}
/* Helper for mkvalue() to scan the length of a format */
static Py_ssize_t
countformat(const char *format, char endchar)
{
Py_ssize_t count = 0;
int level = 0;
while (level > 0 || *format != endchar) {
switch (*format) {
case '\0':
/* Premature end */
PyErr_SetString(PyExc_SystemError,
"unmatched paren in format");
return -1;
case '(':
case '[':
case '{':
if (level == 0) {
count++;
}
level++;
break;
case ')':
case ']':
case '}':
level--;
break;
case '#':
case '&':
case ',':
case ':':
case ' ':
case '\t':
break;
default:
if (level == 0) {
count++;
}
}
format++;
}
return count;
}
/* Generic function to create a value -- the inverse of getargs() */
/* After an original idea and first implementation by Steven Miale */
static PyObject *do_mktuple(const char**, va_list *, char, Py_ssize_t);
static int do_mkstack(PyObject **, const char**, va_list *, char, Py_ssize_t);
static PyObject *do_mklist(const char**, va_list *, char, Py_ssize_t);
static PyObject *do_mkdict(const char**, va_list *, char, Py_ssize_t);
static PyObject *do_mkvalue(const char**, va_list *);
static int
check_end(const char **p_format, char endchar)
{
const char *f = *p_format;
while (*f != endchar) {
if (*f != ' ' && *f != '\t' && *f != ',' && *f != ':') {
PyErr_SetString(PyExc_SystemError,
"Unmatched paren in format");
return 0;
}
f++;
}
if (endchar) {
f++;
}
*p_format = f;
return 1;
}
static void
do_ignore(const char **p_format, va_list *p_va, char endchar, Py_ssize_t n)
{
assert(PyErr_Occurred());
PyObject *v = PyTuple_New(n);
for (Py_ssize_t i = 0; i < n; i++) {
PyObject *exc = PyErr_GetRaisedException();
PyObject *w = do_mkvalue(p_format, p_va);
PyErr_SetRaisedException(exc);
if (w != NULL) {
if (v != NULL) {
PyTuple_SET_ITEM(v, i, w);
}
else {
Py_DECREF(w);
}
}
}
Py_XDECREF(v);
if (!check_end(p_format, endchar)) {
return;
}
}
static PyObject *
do_mkdict(const char **p_format, va_list *p_va, char endchar, Py_ssize_t n)
{
PyObject *d;
Py_ssize_t i;
if (n < 0)
return NULL;
if (n % 2) {
PyErr_SetString(PyExc_SystemError,
"Bad dict format");
do_ignore(p_format, p_va, endchar, n);
return NULL;
}
/* Note that we can't bail immediately on error as this will leak
refcounts on any 'N' arguments. */
if ((d = PyDict_New()) == NULL) {
do_ignore(p_format, p_va, endchar, n);
return NULL;
}
for (i = 0; i < n; i+= 2) {
PyObject *k, *v;
k = do_mkvalue(p_format, p_va);
if (k == NULL) {
do_ignore(p_format, p_va, endchar, n - i - 1);
Py_DECREF(d);
return NULL;
}
v = do_mkvalue(p_format, p_va);
if (v == NULL || PyDict_SetItem(d, k, v) < 0) {
do_ignore(p_format, p_va, endchar, n - i - 2);
Py_DECREF(k);
Py_XDECREF(v);
Py_DECREF(d);
return NULL;
}
Py_DECREF(k);
Py_DECREF(v);
}
if (!check_end(p_format, endchar)) {
Py_DECREF(d);
return NULL;
}
return d;
}
static PyObject *
do_mklist(const char **p_format, va_list *p_va, char endchar, Py_ssize_t n)
{
PyObject *v;
Py_ssize_t i;
if (n < 0)
return NULL;
/* Note that we can't bail immediately on error as this will leak
refcounts on any 'N' arguments. */
v = PyList_New(n);
if (v == NULL) {
do_ignore(p_format, p_va, endchar, n);
return NULL;
}
for (i = 0; i < n; i++) {
PyObject *w = do_mkvalue(p_format, p_va);
if (w == NULL) {
do_ignore(p_format, p_va, endchar, n - i - 1);
Py_DECREF(v);
return NULL;
}
PyList_SET_ITEM(v, i, w);
}
if (!check_end(p_format, endchar)) {
Py_DECREF(v);
return NULL;
}
return v;
}
static int
do_mkstack(PyObject **stack, const char **p_format, va_list *p_va,
char endchar, Py_ssize_t n)
{
Py_ssize_t i;
if (n < 0) {
return -1;
}
/* Note that we can't bail immediately on error as this will leak
refcounts on any 'N' arguments. */
for (i = 0; i < n; i++) {
PyObject *w = do_mkvalue(p_format, p_va);
if (w == NULL) {
do_ignore(p_format, p_va, endchar, n - i - 1);
goto error;
}
stack[i] = w;
}
if (!check_end(p_format, endchar)) {
goto error;
}
return 0;
error:
n = i;
for (i=0; i < n; i++) {
Py_DECREF(stack[i]);
}
return -1;
}
static PyObject *
do_mktuple(const char **p_format, va_list *p_va, char endchar, Py_ssize_t n)
{
PyObject *v;
Py_ssize_t i;
if (n < 0)
return NULL;
/* Note that we can't bail immediately on error as this will leak
refcounts on any 'N' arguments. */
if ((v = PyTuple_New(n)) == NULL) {
do_ignore(p_format, p_va, endchar, n);
return NULL;
}
for (i = 0; i < n; i++) {
PyObject *w = do_mkvalue(p_format, p_va);
if (w == NULL) {
do_ignore(p_format, p_va, endchar, n - i - 1);
Py_DECREF(v);
return NULL;
}
PyTuple_SET_ITEM(v, i, w);
}
if (!check_end(p_format, endchar)) {
Py_DECREF(v);
return NULL;
}
return v;
}
static PyObject *
do_mkvalue(const char **p_format, va_list *p_va)
{
for (;;) {
switch (*(*p_format)++) {
case '(':
return do_mktuple(p_format, p_va, ')',
countformat(*p_format, ')'));
case '[':
return do_mklist(p_format, p_va, ']',
countformat(*p_format, ']'));
case '{':
return do_mkdict(p_format, p_va, '}',
countformat(*p_format, '}'));
case 'b':
case 'B':
case 'h':
case 'i':
return PyLong_FromLong((long)va_arg(*p_va, int));
case 'H':
return PyLong_FromLong((long)va_arg(*p_va, unsigned int));
case 'I':
{
unsigned int n;
n = va_arg(*p_va, unsigned int);
return PyLong_FromUnsignedLong(n);
}
case 'n':
#if SIZEOF_SIZE_T!=SIZEOF_LONG
return PyLong_FromSsize_t(va_arg(*p_va, Py_ssize_t));
#endif
/* Fall through from 'n' to 'l' if Py_ssize_t is long */
_Py_FALLTHROUGH;
case 'l':
return PyLong_FromLong(va_arg(*p_va, long));
case 'k':
{
unsigned long n;
n = va_arg(*p_va, unsigned long);
return PyLong_FromUnsignedLong(n);
}
case 'L':
return PyLong_FromLongLong((long long)va_arg(*p_va, long long));
case 'K':
return PyLong_FromUnsignedLongLong(
va_arg(*p_va, unsigned long long));
case 'u':
{
PyObject *v;
const wchar_t *u = va_arg(*p_va, wchar_t*);
Py_ssize_t n;
if (**p_format == '#') {
++*p_format;
n = va_arg(*p_va, Py_ssize_t);
}
else
n = -1;
if (u == NULL) {
v = Py_NewRef(Py_None);
}
else {
if (n < 0)
n = wcslen(u);
v = PyUnicode_FromWideChar(u, n);
}
return v;
}
case 'f':
case 'd':
return PyFloat_FromDouble(
(double)va_arg(*p_va, va_double));
case 'D':
return PyComplex_FromCComplex(
*((Py_complex *)va_arg(*p_va, Py_complex *)));
case 'c':
{
char p[1];
p[0] = (char)va_arg(*p_va, int);
return PyBytes_FromStringAndSize(p, 1);
}
case 'C':
{
int i = va_arg(*p_va, int);
return PyUnicode_FromOrdinal(i);
}
case 'p':
{
int i = va_arg(*p_va, int);
return PyBool_FromLong(i);
}
case 's':
case 'z':
case 'U': /* XXX deprecated alias */
{
PyObject *v;
const char *str = va_arg(*p_va, const char *);
Py_ssize_t n;
if (**p_format == '#') {
++*p_format;
n = va_arg(*p_va, Py_ssize_t);
}
else
n = -1;
if (str == NULL) {
v = Py_NewRef(Py_None);
}
else {
if (n < 0) {
size_t m = strlen(str);
if (m > PY_SSIZE_T_MAX) {
PyErr_SetString(PyExc_OverflowError,
"string too long for Python string");
return NULL;
}
n = (Py_ssize_t)m;
}
v = PyUnicode_FromStringAndSize(str, n);
}
return v;
}
case 'y':
{
PyObject *v;
const char *str = va_arg(*p_va, const char *);
Py_ssize_t n;
if (**p_format == '#') {
++*p_format;
n = va_arg(*p_va, Py_ssize_t);
}
else
n = -1;
if (str == NULL) {
v = Py_NewRef(Py_None);
}
else {
if (n < 0) {
size_t m = strlen(str);
if (m > PY_SSIZE_T_MAX) {
PyErr_SetString(PyExc_OverflowError,
"string too long for Python bytes");
return NULL;
}
n = (Py_ssize_t)m;
}
v = PyBytes_FromStringAndSize(str, n);
}
return v;
}
case 'N':
case 'S':
case 'O':
if (**p_format == '&') {
typedef PyObject *(*converter)(void *);
converter func = va_arg(*p_va, converter);
void *arg = va_arg(*p_va, void *);
++*p_format;
return (*func)(arg);
}
else {
PyObject *v;
v = va_arg(*p_va, PyObject *);
if (v != NULL) {
if (*(*p_format - 1) != 'N')
Py_INCREF(v);
}
else if (!PyErr_Occurred())
/* If a NULL was passed
* because a call that should
* have constructed a value
* failed, that's OK, and we
* pass the error on; but if
* no error occurred it's not
* clear that the caller knew
* what she was doing. */
PyErr_SetString(PyExc_SystemError,
"NULL object passed to Py_BuildValue");
return v;
}
case ':':
case ',':
case ' ':
case '\t':
break;
default:
PyErr_SetString(PyExc_SystemError,
"bad format char passed to Py_BuildValue");
return NULL;
}
}
}
PyObject *
Py_BuildValue(const char *format, ...)
{
va_list va;
PyObject* retval;
va_start(va, format);
retval = va_build_value(format, va);
va_end(va);
return retval;
}
PyAPI_FUNC(PyObject *) /* abi only */
_Py_BuildValue_SizeT(const char *format, ...)
{
va_list va;
PyObject* retval;
va_start(va, format);
retval = va_build_value(format, va);
va_end(va);
return retval;
}
PyObject *
Py_VaBuildValue(const char *format, va_list va)
{
return va_build_value(format, va);
}
PyAPI_FUNC(PyObject *) /* abi only */
_Py_VaBuildValue_SizeT(const char *format, va_list va)
{
return va_build_value(format, va);
}
static PyObject *
va_build_value(const char *format, va_list va)
{
const char *f = format;
Py_ssize_t n = countformat(f, '\0');
va_list lva;
PyObject *retval;
if (n < 0)
return NULL;
if (n == 0) {
Py_RETURN_NONE;
}
va_copy(lva, va);
if (n == 1) {
retval = do_mkvalue(&f, &lva);
} else {
retval = do_mktuple(&f, &lva, '\0', n);
}
va_end(lva);
return retval;
}
PyObject **
_Py_VaBuildStack(PyObject **small_stack, Py_ssize_t small_stack_len,
const char *format, va_list va, Py_ssize_t *p_nargs)
{
const char *f;
Py_ssize_t n;
va_list lva;
PyObject **stack;
int res;
n = countformat(format, '\0');
if (n < 0) {
*p_nargs = 0;
return NULL;
}
if (n == 0) {
*p_nargs = 0;
return small_stack;
}
if (n <= small_stack_len) {
stack = small_stack;
}
else {
stack = PyMem_Malloc(n * sizeof(stack[0]));
if (stack == NULL) {
PyErr_NoMemory();
return NULL;
}
}
va_copy(lva, va);
f = format;
res = do_mkstack(stack, &f, &lva, '\0', n);
va_end(lva);
if (res < 0) {
if (stack != small_stack) {
PyMem_Free(stack);
}
return NULL;
}
*p_nargs = n;
return stack;
}
int
PyModule_AddObjectRef(PyObject *mod, const char *name, PyObject *value)
{
if (!PyModule_Check(mod)) {
PyErr_SetString(PyExc_TypeError,
"PyModule_AddObjectRef() first argument "
"must be a module");
return -1;
}
if (!value) {
if (!PyErr_Occurred()) {
PyErr_SetString(PyExc_SystemError,
"PyModule_AddObjectRef() must be called "
"with an exception raised if value is NULL");
}
return -1;
}
PyObject *dict = PyModule_GetDict(mod);
if (dict == NULL) {
/* Internal error -- modules must have a dict! */
PyErr_Format(PyExc_SystemError, "module '%s' has no __dict__",
PyModule_GetName(mod));
return -1;
}
return PyDict_SetItemString(dict, name, value);
}
int
PyModule_Add(PyObject *mod, const char *name, PyObject *value)
{
int res = PyModule_AddObjectRef(mod, name, value);
Py_XDECREF(value);
return res;
}
int
PyModule_AddObject(PyObject *mod, const char *name, PyObject *value)
{
int res = PyModule_AddObjectRef(mod, name, value);
if (res == 0) {
Py_DECREF(value);
}
return res;
}
int
PyModule_AddIntConstant(PyObject *m, const char *name, long value)
{
return PyModule_Add(m, name, PyLong_FromLong(value));
}
int
PyModule_AddStringConstant(PyObject *m, const char *name, const char *value)
{
return PyModule_Add(m, name, PyUnicode_FromString(value));
}
int
PyModule_AddType(PyObject *module, PyTypeObject *type)
{
if (!_PyType_IsReady(type) && PyType_Ready(type) < 0) {
return -1;
}
const char *name = _PyType_Name(type);
assert(name != NULL);
return PyModule_AddObjectRef(module, name, (PyObject *)type);
}
static int _abiinfo_raise(const char *module_name, const char *format, ...)
{
PyUnicodeWriter *writer = PyUnicodeWriter_Create(0);
if (!writer) {
return -1;
}
if (module_name) {
if (PyUnicodeWriter_WriteUTF8(writer, module_name, -1) < 0) {
PyUnicodeWriter_Discard(writer);
return -1;
}
if (PyUnicodeWriter_WriteASCII(writer, ": ", 2) < 0) {
PyUnicodeWriter_Discard(writer);
return -1;
}
}
va_list vargs;
va_start(vargs, format);
if (_PyUnicodeWriter_FormatV(writer, format, vargs) < 0) {
va_end(vargs);
PyUnicodeWriter_Discard(writer);
return -1;
}
va_end(vargs);
PyObject *message = PyUnicodeWriter_Finish(writer);
if (!message) {
return -1;
}
PyErr_SetObject(PyExc_ImportError, message);
Py_DECREF(message);
return -1;
}
int PyABIInfo_Check(PyABIInfo *info, const char *module_name)
{
if (!info) {
return _abiinfo_raise(module_name, "NULL PyABIInfo");
}
/* abiinfo_major_version */
if (info->abiinfo_major_version == 0) {
return 0;
}
if (info->abiinfo_major_version > 1) {
return _abiinfo_raise(module_name, "PyABIInfo version too high");
}
/* Internal ABI */
if (info->flags & PyABIInfo_INTERNAL) {
if (info->abi_version && (info->abi_version != PY_VERSION_HEX)) {
return _abiinfo_raise(
module_name,
"incompatible internal ABI (0x%x != 0x%x)",
info->abi_version, PY_VERSION_HEX);
}
}
#define XY_MASK 0xffff0000
if (info->flags & PyABIInfo_STABLE) {
/* Greater-than major.minor version check */
if (info->abi_version) {
if ((info->abi_version & XY_MASK) > (PY_VERSION_HEX & XY_MASK)) {
return _abiinfo_raise(
module_name,
"incompatible future stable ABI version (%d.%d)",
((info->abi_version) >> 24) & 0xff,
((info->abi_version) >> 16) & 0xff);
}
if (info->abi_version < Py_PACK_VERSION(3, 2)) {
return _abiinfo_raise(
module_name,
"invalid stable ABI version (%d.%d)",
((info->abi_version) >> 24) & 0xff,
((info->abi_version) >> 16) & 0xff);
}
}
if (info->flags & PyABIInfo_INTERNAL) {
return _abiinfo_raise(module_name,
"cannot use both internal and stable ABI");
}
}
else {
/* Exact major.minor version check */
if (info->abi_version) {
if ((info->abi_version & XY_MASK) != (PY_VERSION_HEX & XY_MASK)) {
return _abiinfo_raise(
module_name,
"incompatible ABI version (%d.%d)",
((info->abi_version) >> 24) & 0xff,
((info->abi_version) >> 16) & 0xff);
}
}
}
#undef XY_MASK
/* Free-threading/GIL */
uint16_t gilflags = info->flags & (PyABIInfo_GIL | PyABIInfo_FREETHREADED);
#if Py_GIL_DISABLED
if (gilflags == PyABIInfo_GIL) {
return _abiinfo_raise(module_name,
"incompatible with free-threaded CPython");
}
#else
if (gilflags == PyABIInfo_FREETHREADED) {
return _abiinfo_raise(module_name,
"only compatible with free-threaded CPython");
}
#endif
return 0;
}
/* Exported functions for version helper macros */
#undef Py_PACK_FULL_VERSION
uint32_t
Py_PACK_FULL_VERSION(int x, int y, int z, int level, int serial)
{
return _Py_PACK_FULL_VERSION(x, y, z, level, serial);
}
#undef Py_PACK_VERSION
uint32_t
Py_PACK_VERSION(int x, int y)
{
return _Py_PACK_VERSION(x, y);
}