forked from python/cpython
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathbltinmodule.c
More file actions
2458 lines (2127 loc) · 56.6 KB
/
Copy pathbltinmodule.c
File metadata and controls
2458 lines (2127 loc) · 56.6 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
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
/* Built-in functions */
#include "Python.h"
#include "node.h"
#include "compile.h"
#include "eval.h"
#include <ctype.h>
#ifdef RISCOS
#include "unixstuff.h"
#endif
/* The default encoding used by the platform file system APIs
Can remain NULL for all platforms that don't have such a concept
*/
#if defined(MS_WINDOWS) && defined(HAVE_USABLE_WCHAR_T)
const char *Py_FileSystemDefaultEncoding = "mbcs";
#elif defined(__APPLE__)
const char *Py_FileSystemDefaultEncoding = "utf-8";
#else
const char *Py_FileSystemDefaultEncoding = NULL; /* use default */
#endif
/* Forward */
static PyObject *filterstring(PyObject *, PyObject *);
#ifdef Py_USING_UNICODE
static PyObject *filterunicode(PyObject *, PyObject *);
#endif
static PyObject *filtertuple (PyObject *, PyObject *);
static PyObject *
builtin___import__(PyObject *self, PyObject *args)
{
char *name;
PyObject *globals = NULL;
PyObject *locals = NULL;
PyObject *fromlist = NULL;
if (!PyArg_ParseTuple(args, "s|OOO:__import__",
&name, &globals, &locals, &fromlist))
return NULL;
return PyImport_ImportModuleEx(name, globals, locals, fromlist);
}
PyDoc_STRVAR(import_doc,
"__import__(name, globals, locals, fromlist) -> module\n\
\n\
Import a module. The globals are only used to determine the context;\n\
they are not modified. The locals are currently unused. The fromlist\n\
should be a list of names to emulate ``from name import ...'', or an\n\
empty list to emulate ``import name''.\n\
When importing a module from a package, note that __import__('A.B', ...)\n\
returns package A when fromlist is empty, but its submodule B when\n\
fromlist is not empty.");
static PyObject *
builtin_abs(PyObject *self, PyObject *v)
{
return PyNumber_Absolute(v);
}
PyDoc_STRVAR(abs_doc,
"abs(number) -> number\n\
\n\
Return the absolute value of the argument.");
static PyObject *
builtin_apply(PyObject *self, PyObject *args)
{
PyObject *func, *alist = NULL, *kwdict = NULL;
PyObject *t = NULL, *retval = NULL;
if (!PyArg_UnpackTuple(args, "apply", 1, 3, &func, &alist, &kwdict))
return NULL;
if (alist != NULL) {
if (!PyTuple_Check(alist)) {
if (!PySequence_Check(alist)) {
PyErr_Format(PyExc_TypeError,
"apply() arg 2 expected sequence, found %s",
alist->ob_type->tp_name);
return NULL;
}
t = PySequence_Tuple(alist);
if (t == NULL)
return NULL;
alist = t;
}
}
if (kwdict != NULL && !PyDict_Check(kwdict)) {
PyErr_Format(PyExc_TypeError,
"apply() arg 3 expected dictionary, found %s",
kwdict->ob_type->tp_name);
goto finally;
}
retval = PyEval_CallObjectWithKeywords(func, alist, kwdict);
finally:
Py_XDECREF(t);
return retval;
}
PyDoc_STRVAR(apply_doc,
"apply(object[, args[, kwargs]]) -> value\n\
\n\
Call a callable object with positional arguments taken from the tuple args,\n\
and keyword arguments taken from the optional dictionary kwargs.\n\
Note that classes are callable, as are instances with a __call__() method.\n\
\n\
Deprecated since release 2.3. Instead, use the extended call syntax:\n\
function(*args, **keywords).");
static PyObject *
builtin_callable(PyObject *self, PyObject *v)
{
return PyBool_FromLong((long)PyCallable_Check(v));
}
PyDoc_STRVAR(callable_doc,
"callable(object) -> bool\n\
\n\
Return whether the object is callable (i.e., some kind of function).\n\
Note that classes are callable, as are instances with a __call__() method.");
static PyObject *
builtin_filter(PyObject *self, PyObject *args)
{
PyObject *func, *seq, *result, *it, *arg;
int len; /* guess for result list size */
register int j;
if (!PyArg_UnpackTuple(args, "filter", 2, 2, &func, &seq))
return NULL;
/* Strings and tuples return a result of the same type. */
if (PyString_Check(seq))
return filterstring(func, seq);
#ifdef Py_USING_UNICODE
if (PyUnicode_Check(seq))
return filterunicode(func, seq);
#endif
if (PyTuple_Check(seq))
return filtertuple(func, seq);
/* Get iterator. */
it = PyObject_GetIter(seq);
if (it == NULL)
return NULL;
/* Guess a result list size. */
len = -1; /* unknown */
if (PySequence_Check(seq) &&
seq->ob_type->tp_as_sequence->sq_length) {
len = PySequence_Size(seq);
if (len < 0)
PyErr_Clear();
}
if (len < 0)
len = 8; /* arbitrary */
/* Pre-allocate argument list tuple. */
arg = PyTuple_New(1);
if (arg == NULL)
goto Fail_arg;
/* Get a result list. */
if (PyList_Check(seq) && seq->ob_refcnt == 1) {
/* Eww - can modify the list in-place. */
Py_INCREF(seq);
result = seq;
}
else {
result = PyList_New(len);
if (result == NULL)
goto Fail_it;
}
/* Build the result list. */
j = 0;
for (;;) {
PyObject *item;
int ok;
item = PyIter_Next(it);
if (item == NULL) {
if (PyErr_Occurred())
goto Fail_result_it;
break;
}
if (func == Py_None) {
ok = PyObject_IsTrue(item);
}
else {
PyObject *good;
PyTuple_SET_ITEM(arg, 0, item);
good = PyObject_Call(func, arg, NULL);
PyTuple_SET_ITEM(arg, 0, NULL);
if (good == NULL) {
Py_DECREF(item);
goto Fail_result_it;
}
ok = PyObject_IsTrue(good);
Py_DECREF(good);
}
if (ok) {
if (j < len)
PyList_SET_ITEM(result, j, item);
else {
int status = PyList_Append(result, item);
Py_DECREF(item);
if (status < 0)
goto Fail_result_it;
}
++j;
}
else
Py_DECREF(item);
}
/* Cut back result list if len is too big. */
if (j < len && PyList_SetSlice(result, j, len, NULL) < 0)
goto Fail_result_it;
Py_DECREF(it);
Py_DECREF(arg);
return result;
Fail_result_it:
Py_DECREF(result);
Fail_it:
Py_DECREF(it);
Fail_arg:
Py_DECREF(arg);
return NULL;
}
PyDoc_STRVAR(filter_doc,
"filter(function or None, sequence) -> list, tuple, or string\n"
"\n"
"Return those items of sequence for which function(item) is true. If\n"
"function is None, return the items that are true. If sequence is a tuple\n"
"or string, return the same type, else return a list.");
static PyObject *
builtin_chr(PyObject *self, PyObject *args)
{
long x;
char s[1];
if (!PyArg_ParseTuple(args, "l:chr", &x))
return NULL;
if (x < 0 || x >= 256) {
PyErr_SetString(PyExc_ValueError,
"chr() arg not in range(256)");
return NULL;
}
s[0] = (char)x;
return PyString_FromStringAndSize(s, 1);
}
PyDoc_STRVAR(chr_doc,
"chr(i) -> character\n\
\n\
Return a string of one character with ordinal i; 0 <= i < 256.");
#ifdef Py_USING_UNICODE
static PyObject *
builtin_unichr(PyObject *self, PyObject *args)
{
long x;
if (!PyArg_ParseTuple(args, "l:unichr", &x))
return NULL;
return PyUnicode_FromOrdinal(x);
}
PyDoc_STRVAR(unichr_doc,
"unichr(i) -> Unicode character\n\
\n\
Return a Unicode string of one character with ordinal i; 0 <= i <= 0x10ffff.");
#endif
static PyObject *
builtin_cmp(PyObject *self, PyObject *args)
{
PyObject *a, *b;
int c;
if (!PyArg_UnpackTuple(args, "cmp", 2, 2, &a, &b))
return NULL;
if (PyObject_Cmp(a, b, &c) < 0)
return NULL;
return PyInt_FromLong((long)c);
}
PyDoc_STRVAR(cmp_doc,
"cmp(x, y) -> integer\n\
\n\
Return negative if x<y, zero if x==y, positive if x>y.");
static PyObject *
builtin_coerce(PyObject *self, PyObject *args)
{
PyObject *v, *w;
PyObject *res;
if (!PyArg_UnpackTuple(args, "coerce", 2, 2, &v, &w))
return NULL;
if (PyNumber_Coerce(&v, &w) < 0)
return NULL;
res = Py_BuildValue("(OO)", v, w);
Py_DECREF(v);
Py_DECREF(w);
return res;
}
PyDoc_STRVAR(coerce_doc,
"coerce(x, y) -> (x1, y1)\n\
\n\
Return a tuple consisting of the two numeric arguments converted to\n\
a common type, using the same rules as used by arithmetic operations.\n\
If coercion is not possible, raise TypeError.");
static PyObject *
builtin_compile(PyObject *self, PyObject *args)
{
char *str;
char *filename;
char *startstr;
int start;
int dont_inherit = 0;
int supplied_flags = 0;
PyCompilerFlags cf;
PyObject *result, *cmd, *tmp = NULL;
int length;
if (!PyArg_ParseTuple(args, "Oss|ii:compile", &cmd, &filename,
&startstr, &supplied_flags, &dont_inherit))
return NULL;
cf.cf_flags = supplied_flags;
#ifdef Py_USING_UNICODE
if (PyUnicode_Check(cmd)) {
tmp = PyUnicode_AsUTF8String(cmd);
if (tmp == NULL)
return NULL;
cmd = tmp;
cf.cf_flags |= PyCF_SOURCE_IS_UTF8;
}
#endif
if (PyObject_AsReadBuffer(cmd, (const void **)&str, &length))
return NULL;
if ((size_t)length != strlen(str)) {
PyErr_SetString(PyExc_TypeError,
"compile() expected string without null bytes");
return NULL;
}
if (strcmp(startstr, "exec") == 0)
start = Py_file_input;
else if (strcmp(startstr, "eval") == 0)
start = Py_eval_input;
else if (strcmp(startstr, "single") == 0)
start = Py_single_input;
else {
PyErr_SetString(PyExc_ValueError,
"compile() arg 3 must be 'exec' or 'eval' or 'single'");
return NULL;
}
if (supplied_flags &
~(PyCF_MASK | PyCF_MASK_OBSOLETE | PyCF_DONT_IMPLY_DEDENT))
{
PyErr_SetString(PyExc_ValueError,
"compile(): unrecognised flags");
return NULL;
}
/* XXX Warn if (supplied_flags & PyCF_MASK_OBSOLETE) != 0? */
if (!dont_inherit) {
PyEval_MergeCompilerFlags(&cf);
}
result = Py_CompileStringFlags(str, filename, start, &cf);
Py_XDECREF(tmp);
return result;
}
PyDoc_STRVAR(compile_doc,
"compile(source, filename, mode[, flags[, dont_inherit]]) -> code object\n\
\n\
Compile the source string (a Python module, statement or expression)\n\
into a code object that can be executed by the exec statement or eval().\n\
The filename will be used for run-time error messages.\n\
The mode must be 'exec' to compile a module, 'single' to compile a\n\
single (interactive) statement, or 'eval' to compile an expression.\n\
The flags argument, if present, controls which future statements influence\n\
the compilation of the code.\n\
The dont_inherit argument, if non-zero, stops the compilation inheriting\n\
the effects of any future statements in effect in the code calling\n\
compile; if absent or zero these statements do influence the compilation,\n\
in addition to any features explicitly specified.");
static PyObject *
builtin_dir(PyObject *self, PyObject *args)
{
PyObject *arg = NULL;
if (!PyArg_UnpackTuple(args, "dir", 0, 1, &arg))
return NULL;
return PyObject_Dir(arg);
}
PyDoc_STRVAR(dir_doc,
"dir([object]) -> list of strings\n"
"\n"
"Return an alphabetized list of names comprising (some of) the attributes\n"
"of the given object, and of attributes reachable from it:\n"
"\n"
"No argument: the names in the current scope.\n"
"Module object: the module attributes.\n"
"Type or class object: its attributes, and recursively the attributes of\n"
" its bases.\n"
"Otherwise: its attributes, its class's attributes, and recursively the\n"
" attributes of its class's base classes.");
static PyObject *
builtin_divmod(PyObject *self, PyObject *args)
{
PyObject *v, *w;
if (!PyArg_UnpackTuple(args, "divmod", 2, 2, &v, &w))
return NULL;
return PyNumber_Divmod(v, w);
}
PyDoc_STRVAR(divmod_doc,
"divmod(x, y) -> (div, mod)\n\
\n\
Return the tuple ((x-x%y)/y, x%y). Invariant: div*y + mod == x.");
static PyObject *
builtin_eval(PyObject *self, PyObject *args)
{
PyObject *cmd, *result, *tmp = NULL;
PyObject *globals = Py_None, *locals = Py_None;
char *str;
PyCompilerFlags cf;
if (!PyArg_ParseTuple(args, "O|O!O!:eval",
&cmd,
&PyDict_Type, &globals,
&PyDict_Type, &locals))
return NULL;
if (globals == Py_None) {
globals = PyEval_GetGlobals();
if (locals == Py_None)
locals = PyEval_GetLocals();
}
else if (locals == Py_None)
locals = globals;
if (PyDict_GetItemString(globals, "__builtins__") == NULL) {
if (PyDict_SetItemString(globals, "__builtins__",
PyEval_GetBuiltins()) != 0)
return NULL;
}
if (PyCode_Check(cmd)) {
if (PyCode_GetNumFree((PyCodeObject *)cmd) > 0) {
PyErr_SetString(PyExc_TypeError,
"code object passed to eval() may not contain free variables");
return NULL;
}
return PyEval_EvalCode((PyCodeObject *) cmd, globals, locals);
}
if (!PyString_Check(cmd) &&
!PyUnicode_Check(cmd)) {
PyErr_SetString(PyExc_TypeError,
"eval() arg 1 must be a string or code object");
return NULL;
}
cf.cf_flags = 0;
#ifdef Py_USING_UNICODE
if (PyUnicode_Check(cmd)) {
tmp = PyUnicode_AsUTF8String(cmd);
if (tmp == NULL)
return NULL;
cmd = tmp;
cf.cf_flags |= PyCF_SOURCE_IS_UTF8;
}
#endif
if (PyString_AsStringAndSize(cmd, &str, NULL))
return NULL;
while (*str == ' ' || *str == '\t')
str++;
(void)PyEval_MergeCompilerFlags(&cf);
result = PyRun_StringFlags(str, Py_eval_input, globals, locals, &cf);
Py_XDECREF(tmp);
return result;
}
PyDoc_STRVAR(eval_doc,
"eval(source[, globals[, locals]]) -> value\n\
\n\
Evaluate the source in the context of globals and locals.\n\
The source may be a string representing a Python expression\n\
or a code object as returned by compile().\n\
The globals and locals are dictionaries, defaulting to the current\n\
globals and locals. If only globals is given, locals defaults to it.");
static PyObject *
builtin_execfile(PyObject *self, PyObject *args)
{
char *filename;
PyObject *globals = Py_None, *locals = Py_None;
PyObject *res;
FILE* fp = NULL;
PyCompilerFlags cf;
int exists;
if (!PyArg_ParseTuple(args, "s|O!O!:execfile",
&filename,
&PyDict_Type, &globals,
&PyDict_Type, &locals))
return NULL;
if (globals == Py_None) {
globals = PyEval_GetGlobals();
if (locals == Py_None)
locals = PyEval_GetLocals();
}
else if (locals == Py_None)
locals = globals;
if (PyDict_GetItemString(globals, "__builtins__") == NULL) {
if (PyDict_SetItemString(globals, "__builtins__",
PyEval_GetBuiltins()) != 0)
return NULL;
}
exists = 0;
/* Test for existence or directory. */
#if defined(PLAN9)
{
Dir *d;
if ((d = dirstat(filename))!=nil) {
if(d->mode & DMDIR)
werrstr("is a directory");
else
exists = 1;
free(d);
}
}
#elif defined(RISCOS)
if (object_exists(filename)) {
if (isdir(filename))
errno = EISDIR;
else
exists = 1;
}
#else /* standard Posix */
{
struct stat s;
if (stat(filename, &s) == 0) {
if (S_ISDIR(s.st_mode))
# if defined(PYOS_OS2) && defined(PYCC_VACPP)
errno = EOS2ERR;
# else
errno = EISDIR;
# endif
else
exists = 1;
}
}
#endif
if (exists) {
Py_BEGIN_ALLOW_THREADS
fp = fopen(filename, "r" PY_STDIOTEXTMODE);
Py_END_ALLOW_THREADS
if (fp == NULL) {
exists = 0;
}
}
if (!exists) {
PyErr_SetFromErrnoWithFilename(PyExc_IOError, filename);
return NULL;
}
cf.cf_flags = 0;
if (PyEval_MergeCompilerFlags(&cf))
res = PyRun_FileExFlags(fp, filename, Py_file_input, globals,
locals, 1, &cf);
else
res = PyRun_FileEx(fp, filename, Py_file_input, globals,
locals, 1);
return res;
}
PyDoc_STRVAR(execfile_doc,
"execfile(filename[, globals[, locals]])\n\
\n\
Read and execute a Python script from a file.\n\
The globals and locals are dictionaries, defaulting to the current\n\
globals and locals. If only globals is given, locals defaults to it.");
static PyObject *
builtin_getattr(PyObject *self, PyObject *args)
{
PyObject *v, *result, *dflt = NULL;
PyObject *name;
if (!PyArg_UnpackTuple(args, "getattr", 2, 3, &v, &name, &dflt))
return NULL;
#ifdef Py_USING_UNICODE
if (PyUnicode_Check(name)) {
name = _PyUnicode_AsDefaultEncodedString(name, NULL);
if (name == NULL)
return NULL;
}
#endif
if (!PyString_Check(name)) {
PyErr_SetString(PyExc_TypeError,
"getattr(): attribute name must be string");
return NULL;
}
result = PyObject_GetAttr(v, name);
if (result == NULL && dflt != NULL &&
PyErr_ExceptionMatches(PyExc_AttributeError))
{
PyErr_Clear();
Py_INCREF(dflt);
result = dflt;
}
return result;
}
PyDoc_STRVAR(getattr_doc,
"getattr(object, name[, default]) -> value\n\
\n\
Get a named attribute from an object; getattr(x, 'y') is equivalent to x.y.\n\
When a default argument is given, it is returned when the attribute doesn't\n\
exist; without it, an exception is raised in that case.");
static PyObject *
builtin_globals(PyObject *self)
{
PyObject *d;
d = PyEval_GetGlobals();
Py_INCREF(d);
return d;
}
PyDoc_STRVAR(globals_doc,
"globals() -> dictionary\n\
\n\
Return the dictionary containing the current scope's global variables.");
static PyObject *
builtin_hasattr(PyObject *self, PyObject *args)
{
PyObject *v;
PyObject *name;
if (!PyArg_UnpackTuple(args, "hasattr", 2, 2, &v, &name))
return NULL;
#ifdef Py_USING_UNICODE
if (PyUnicode_Check(name)) {
name = _PyUnicode_AsDefaultEncodedString(name, NULL);
if (name == NULL)
return NULL;
}
#endif
if (!PyString_Check(name)) {
PyErr_SetString(PyExc_TypeError,
"hasattr(): attribute name must be string");
return NULL;
}
v = PyObject_GetAttr(v, name);
if (v == NULL) {
PyErr_Clear();
Py_INCREF(Py_False);
return Py_False;
}
Py_DECREF(v);
Py_INCREF(Py_True);
return Py_True;
}
PyDoc_STRVAR(hasattr_doc,
"hasattr(object, name) -> bool\n\
\n\
Return whether the object has an attribute with the given name.\n\
(This is done by calling getattr(object, name) and catching exceptions.)");
static PyObject *
builtin_id(PyObject *self, PyObject *v)
{
return PyLong_FromVoidPtr(v);
}
PyDoc_STRVAR(id_doc,
"id(object) -> integer\n\
\n\
Return the identity of an object. This is guaranteed to be unique among\n\
simultaneously existing objects. (Hint: it's the object's memory address.)");
static PyObject *
builtin_map(PyObject *self, PyObject *args)
{
typedef struct {
PyObject *it; /* the iterator object */
int saw_StopIteration; /* bool: did the iterator end? */
} sequence;
PyObject *func, *result;
sequence *seqs = NULL, *sqp;
int n, len;
register int i, j;
n = PyTuple_Size(args);
if (n < 2) {
PyErr_SetString(PyExc_TypeError,
"map() requires at least two args");
return NULL;
}
func = PyTuple_GetItem(args, 0);
n--;
if (func == Py_None && n == 1) {
/* map(None, S) is the same as list(S). */
return PySequence_List(PyTuple_GetItem(args, 1));
}
/* Get space for sequence descriptors. Must NULL out the iterator
* pointers so that jumping to Fail_2 later doesn't see trash.
*/
if ((seqs = PyMem_NEW(sequence, n)) == NULL) {
PyErr_NoMemory();
return NULL;
}
for (i = 0; i < n; ++i) {
seqs[i].it = (PyObject*)NULL;
seqs[i].saw_StopIteration = 0;
}
/* Do a first pass to obtain iterators for the arguments, and set len
* to the largest of their lengths.
*/
len = 0;
for (i = 0, sqp = seqs; i < n; ++i, ++sqp) {
PyObject *curseq;
int curlen;
/* Get iterator. */
curseq = PyTuple_GetItem(args, i+1);
sqp->it = PyObject_GetIter(curseq);
if (sqp->it == NULL) {
static char errmsg[] =
"argument %d to map() must support iteration";
char errbuf[sizeof(errmsg) + 25];
PyOS_snprintf(errbuf, sizeof(errbuf), errmsg, i+2);
PyErr_SetString(PyExc_TypeError, errbuf);
goto Fail_2;
}
/* Update len. */
curlen = -1; /* unknown */
if (PySequence_Check(curseq) &&
curseq->ob_type->tp_as_sequence->sq_length) {
curlen = PySequence_Size(curseq);
if (curlen < 0)
PyErr_Clear();
}
if (curlen < 0)
curlen = 8; /* arbitrary */
if (curlen > len)
len = curlen;
}
/* Get space for the result list. */
if ((result = (PyObject *) PyList_New(len)) == NULL)
goto Fail_2;
/* Iterate over the sequences until all have stopped. */
for (i = 0; ; ++i) {
PyObject *alist, *item=NULL, *value;
int numactive = 0;
if (func == Py_None && n == 1)
alist = NULL;
else if ((alist = PyTuple_New(n)) == NULL)
goto Fail_1;
for (j = 0, sqp = seqs; j < n; ++j, ++sqp) {
if (sqp->saw_StopIteration) {
Py_INCREF(Py_None);
item = Py_None;
}
else {
item = PyIter_Next(sqp->it);
if (item)
++numactive;
else {
if (PyErr_Occurred()) {
Py_XDECREF(alist);
goto Fail_1;
}
Py_INCREF(Py_None);
item = Py_None;
sqp->saw_StopIteration = 1;
}
}
if (alist)
PyTuple_SET_ITEM(alist, j, item);
else
break;
}
if (!alist)
alist = item;
if (numactive == 0) {
Py_DECREF(alist);
break;
}
if (func == Py_None)
value = alist;
else {
value = PyEval_CallObject(func, alist);
Py_DECREF(alist);
if (value == NULL)
goto Fail_1;
}
if (i >= len) {
int status = PyList_Append(result, value);
Py_DECREF(value);
if (status < 0)
goto Fail_1;
}
else if (PyList_SetItem(result, i, value) < 0)
goto Fail_1;
}
if (i < len && PyList_SetSlice(result, i, len, NULL) < 0)
goto Fail_1;
goto Succeed;
Fail_1:
Py_DECREF(result);
Fail_2:
result = NULL;
Succeed:
assert(seqs);
for (i = 0; i < n; ++i)
Py_XDECREF(seqs[i].it);
PyMem_DEL(seqs);
return result;
}
PyDoc_STRVAR(map_doc,
"map(function, sequence[, sequence, ...]) -> list\n\
\n\
Return a list of the results of applying the function to the items of\n\
the argument sequence(s). If more than one sequence is given, the\n\
function is called with an argument list consisting of the corresponding\n\
item of each sequence, substituting None for missing values when not all\n\
sequences have the same length. If the function is None, return a list of\n\
the items of the sequence (or a list of tuples if more than one sequence).");
static PyObject *
builtin_setattr(PyObject *self, PyObject *args)
{
PyObject *v;
PyObject *name;
PyObject *value;
if (!PyArg_UnpackTuple(args, "setattr", 3, 3, &v, &name, &value))
return NULL;
if (PyObject_SetAttr(v, name, value) != 0)
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
PyDoc_STRVAR(setattr_doc,
"setattr(object, name, value)\n\
\n\
Set a named attribute on an object; setattr(x, 'y', v) is equivalent to\n\
``x.y = v''.");
static PyObject *
builtin_delattr(PyObject *self, PyObject *args)
{
PyObject *v;
PyObject *name;
if (!PyArg_UnpackTuple(args, "delattr", 2, 2, &v, &name))
return NULL;
if (PyObject_SetAttr(v, name, (PyObject *)NULL) != 0)
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
PyDoc_STRVAR(delattr_doc,
"delattr(object, name)\n\
\n\
Delete a named attribute on an object; delattr(x, 'y') is equivalent to\n\
``del x.y''.");
static PyObject *
builtin_hash(PyObject *self, PyObject *v)
{
long x;
x = PyObject_Hash(v);
if (x == -1)
return NULL;
return PyInt_FromLong(x);
}
PyDoc_STRVAR(hash_doc,
"hash(object) -> integer\n\
\n\
Return a hash value for the object. Two objects with the same value have\n\
the same hash value. The reverse is not necessarily true, but likely.");
static PyObject *
builtin_hex(PyObject *self, PyObject *v)
{
PyNumberMethods *nb;
if ((nb = v->ob_type->tp_as_number) == NULL ||
nb->nb_hex == NULL) {
PyErr_SetString(PyExc_TypeError,
"hex() argument can't be converted to hex");
return NULL;
}
return (*nb->nb_hex)(v);
}
PyDoc_STRVAR(hex_doc,
"hex(number) -> string\n\
\n\
Return the hexadecimal representation of an integer or long integer.");
static PyObject *builtin_raw_input(PyObject *, PyObject *);
static PyObject *
builtin_input(PyObject *self, PyObject *args)
{
PyObject *line;
char *str;
PyObject *res;
PyObject *globals, *locals;
line = builtin_raw_input(self, args);
if (line == NULL)
return line;
if (!PyArg_Parse(line, "s;embedded '\\0' in input line", &str))
return NULL;
while (*str == ' ' || *str == '\t')
str++;
globals = PyEval_GetGlobals();
locals = PyEval_GetLocals();
if (PyDict_GetItemString(globals, "__builtins__") == NULL) {