1 | |
2 | /* New getargs implementation */ |
3 | |
4 | #include "Python.h" |
5 | #include "pycore_tuple.h" // _PyTuple_ITEMS() |
6 | |
7 | #include <ctype.h> |
8 | #include <float.h> |
9 | |
10 | |
11 | #ifdef __cplusplus |
12 | extern "C" { |
13 | #endif |
14 | int PyArg_Parse(PyObject *, const char *, ...); |
15 | int PyArg_ParseTuple(PyObject *, const char *, ...); |
16 | int PyArg_VaParse(PyObject *, const char *, va_list); |
17 | |
18 | int PyArg_ParseTupleAndKeywords(PyObject *, PyObject *, |
19 | const char *, char **, ...); |
20 | int PyArg_VaParseTupleAndKeywords(PyObject *, PyObject *, |
21 | const char *, char **, va_list); |
22 | |
23 | int _PyArg_ParseTupleAndKeywordsFast(PyObject *, PyObject *, |
24 | struct _PyArg_Parser *, ...); |
25 | int _PyArg_VaParseTupleAndKeywordsFast(PyObject *, PyObject *, |
26 | struct _PyArg_Parser *, va_list); |
27 | |
28 | #ifdef HAVE_DECLSPEC_DLL |
29 | /* Export functions */ |
30 | PyAPI_FUNC(int) _PyArg_Parse_SizeT(PyObject *, const char *, ...); |
31 | PyAPI_FUNC(int) _PyArg_ParseStack_SizeT(PyObject *const *args, Py_ssize_t nargs, |
32 | const char *format, ...); |
33 | PyAPI_FUNC(int) _PyArg_ParseStackAndKeywords_SizeT(PyObject *const *args, Py_ssize_t nargs, |
34 | PyObject *kwnames, |
35 | struct _PyArg_Parser *parser, ...); |
36 | PyAPI_FUNC(int) _PyArg_ParseTuple_SizeT(PyObject *, const char *, ...); |
37 | PyAPI_FUNC(int) _PyArg_ParseTupleAndKeywords_SizeT(PyObject *, PyObject *, |
38 | const char *, char **, ...); |
39 | PyAPI_FUNC(PyObject *) _Py_BuildValue_SizeT(const char *, ...); |
40 | PyAPI_FUNC(int) _PyArg_VaParse_SizeT(PyObject *, const char *, va_list); |
41 | PyAPI_FUNC(int) _PyArg_VaParseTupleAndKeywords_SizeT(PyObject *, PyObject *, |
42 | const char *, char **, va_list); |
43 | |
44 | PyAPI_FUNC(int) _PyArg_ParseTupleAndKeywordsFast_SizeT(PyObject *, PyObject *, |
45 | struct _PyArg_Parser *, ...); |
46 | PyAPI_FUNC(int) _PyArg_VaParseTupleAndKeywordsFast_SizeT(PyObject *, PyObject *, |
47 | struct _PyArg_Parser *, va_list); |
48 | #endif |
49 | |
50 | #define FLAG_COMPAT 1 |
51 | #define FLAG_SIZE_T 2 |
52 | |
53 | typedef int (*destr_t)(PyObject *, void *); |
54 | |
55 | |
56 | /* Keep track of "objects" that have been allocated or initialized and |
57 | which will need to be deallocated or cleaned up somehow if overall |
58 | parsing fails. |
59 | */ |
60 | typedef struct { |
61 | void *item; |
62 | destr_t destructor; |
63 | } freelistentry_t; |
64 | |
65 | typedef struct { |
66 | freelistentry_t *entries; |
67 | int first_available; |
68 | int entries_malloced; |
69 | } freelist_t; |
70 | |
71 | #define STATIC_FREELIST_ENTRIES 8 |
72 | |
73 | /* Forward */ |
74 | static int vgetargs1_impl(PyObject *args, PyObject *const *stack, Py_ssize_t nargs, |
75 | const char *format, va_list *p_va, int flags); |
76 | static int vgetargs1(PyObject *, const char *, va_list *, int); |
77 | static void seterror(Py_ssize_t, const char *, int *, const char *, const char *); |
78 | static const char *convertitem(PyObject *, const char **, va_list *, int, int *, |
79 | char *, size_t, freelist_t *); |
80 | static const char *converttuple(PyObject *, const char **, va_list *, int, |
81 | int *, char *, size_t, int, freelist_t *); |
82 | static const char *convertsimple(PyObject *, const char **, va_list *, int, |
83 | char *, size_t, freelist_t *); |
84 | static Py_ssize_t convertbuffer(PyObject *, const void **p, const char **); |
85 | static int getbuffer(PyObject *, Py_buffer *, const char**); |
86 | |
87 | static int vgetargskeywords(PyObject *, PyObject *, |
88 | const char *, char **, va_list *, int); |
89 | static int vgetargskeywordsfast(PyObject *, PyObject *, |
90 | struct _PyArg_Parser *, va_list *, int); |
91 | static int vgetargskeywordsfast_impl(PyObject *const *args, Py_ssize_t nargs, |
92 | PyObject *keywords, PyObject *kwnames, |
93 | struct _PyArg_Parser *parser, |
94 | va_list *p_va, int flags); |
95 | static const char *skipitem(const char **, va_list *, int); |
96 | |
97 | int |
98 | PyArg_Parse(PyObject *args, const char *format, ...) |
99 | { |
100 | int retval; |
101 | va_list va; |
102 | |
103 | va_start(va, format); |
104 | retval = vgetargs1(args, format, &va, FLAG_COMPAT); |
105 | va_end(va); |
106 | return retval; |
107 | } |
108 | |
109 | PyAPI_FUNC(int) |
110 | _PyArg_Parse_SizeT(PyObject *args, const char *format, ...) |
111 | { |
112 | int retval; |
113 | va_list va; |
114 | |
115 | va_start(va, format); |
116 | retval = vgetargs1(args, format, &va, FLAG_COMPAT|FLAG_SIZE_T); |
117 | va_end(va); |
118 | return retval; |
119 | } |
120 | |
121 | |
122 | int |
123 | PyArg_ParseTuple(PyObject *args, const char *format, ...) |
124 | { |
125 | int retval; |
126 | va_list va; |
127 | |
128 | va_start(va, format); |
129 | retval = vgetargs1(args, format, &va, 0); |
130 | va_end(va); |
131 | return retval; |
132 | } |
133 | |
134 | PyAPI_FUNC(int) |
135 | _PyArg_ParseTuple_SizeT(PyObject *args, const char *format, ...) |
136 | { |
137 | int retval; |
138 | va_list va; |
139 | |
140 | va_start(va, format); |
141 | retval = vgetargs1(args, format, &va, FLAG_SIZE_T); |
142 | va_end(va); |
143 | return retval; |
144 | } |
145 | |
146 | |
147 | int |
148 | _PyArg_ParseStack(PyObject *const *args, Py_ssize_t nargs, const char *format, ...) |
149 | { |
150 | int retval; |
151 | va_list va; |
152 | |
153 | va_start(va, format); |
154 | retval = vgetargs1_impl(NULL, args, nargs, format, &va, 0); |
155 | va_end(va); |
156 | return retval; |
157 | } |
158 | |
159 | PyAPI_FUNC(int) |
160 | _PyArg_ParseStack_SizeT(PyObject *const *args, Py_ssize_t nargs, const char *format, ...) |
161 | { |
162 | int retval; |
163 | va_list va; |
164 | |
165 | va_start(va, format); |
166 | retval = vgetargs1_impl(NULL, args, nargs, format, &va, FLAG_SIZE_T); |
167 | va_end(va); |
168 | return retval; |
169 | } |
170 | |
171 | |
172 | int |
173 | PyArg_VaParse(PyObject *args, const char *format, va_list va) |
174 | { |
175 | va_list lva; |
176 | int retval; |
177 | |
178 | va_copy(lva, va); |
179 | |
180 | retval = vgetargs1(args, format, &lva, 0); |
181 | va_end(lva); |
182 | return retval; |
183 | } |
184 | |
185 | PyAPI_FUNC(int) |
186 | _PyArg_VaParse_SizeT(PyObject *args, const char *format, va_list va) |
187 | { |
188 | va_list lva; |
189 | int retval; |
190 | |
191 | va_copy(lva, va); |
192 | |
193 | retval = vgetargs1(args, format, &lva, FLAG_SIZE_T); |
194 | va_end(lva); |
195 | return retval; |
196 | } |
197 | |
198 | |
199 | /* Handle cleanup of allocated memory in case of exception */ |
200 | |
201 | static int |
202 | cleanup_ptr(PyObject *self, void *ptr) |
203 | { |
204 | if (ptr) { |
205 | PyMem_Free(ptr); |
206 | } |
207 | return 0; |
208 | } |
209 | |
210 | static int |
211 | cleanup_buffer(PyObject *self, void *ptr) |
212 | { |
213 | Py_buffer *buf = (Py_buffer *)ptr; |
214 | if (buf) { |
215 | PyBuffer_Release(buf); |
216 | } |
217 | return 0; |
218 | } |
219 | |
220 | static int |
221 | addcleanup(void *ptr, freelist_t *freelist, destr_t destructor) |
222 | { |
223 | int index; |
224 | |
225 | index = freelist->first_available; |
226 | freelist->first_available += 1; |
227 | |
228 | freelist->entries[index].item = ptr; |
229 | freelist->entries[index].destructor = destructor; |
230 | |
231 | return 0; |
232 | } |
233 | |
234 | static int |
235 | cleanreturn(int retval, freelist_t *freelist) |
236 | { |
237 | int index; |
238 | |
239 | if (retval == 0) { |
240 | /* A failure occurred, therefore execute all of the cleanup |
241 | functions. |
242 | */ |
243 | for (index = 0; index < freelist->first_available; ++index) { |
244 | freelist->entries[index].destructor(NULL, |
245 | freelist->entries[index].item); |
246 | } |
247 | } |
248 | if (freelist->entries_malloced) |
249 | PyMem_Free(freelist->entries); |
250 | return retval; |
251 | } |
252 | |
253 | |
254 | static int |
255 | vgetargs1_impl(PyObject *compat_args, PyObject *const *stack, Py_ssize_t nargs, const char *format, |
256 | va_list *p_va, int flags) |
257 | { |
258 | char msgbuf[256]; |
259 | int levels[32]; |
260 | const char *fname = NULL; |
261 | const char *message = NULL; |
262 | int min = -1; |
263 | int max = 0; |
264 | int level = 0; |
265 | int endfmt = 0; |
266 | const char *formatsave = format; |
267 | Py_ssize_t i; |
268 | const char *msg; |
269 | int compat = flags & FLAG_COMPAT; |
270 | freelistentry_t static_entries[STATIC_FREELIST_ENTRIES]; |
271 | freelist_t freelist; |
272 | |
273 | assert(nargs == 0 || stack != NULL); |
274 | |
275 | freelist.entries = static_entries; |
276 | freelist.first_available = 0; |
277 | freelist.entries_malloced = 0; |
278 | |
279 | flags = flags & ~FLAG_COMPAT; |
280 | |
281 | while (endfmt == 0) { |
282 | int c = *format++; |
283 | switch (c) { |
284 | case '(': |
285 | if (level == 0) |
286 | max++; |
287 | level++; |
288 | if (level >= 30) |
289 | Py_FatalError("too many tuple nesting levels " |
290 | "in argument format string" ); |
291 | break; |
292 | case ')': |
293 | if (level == 0) |
294 | Py_FatalError("excess ')' in getargs format" ); |
295 | else |
296 | level--; |
297 | break; |
298 | case '\0': |
299 | endfmt = 1; |
300 | break; |
301 | case ':': |
302 | fname = format; |
303 | endfmt = 1; |
304 | break; |
305 | case ';': |
306 | message = format; |
307 | endfmt = 1; |
308 | break; |
309 | case '|': |
310 | if (level == 0) |
311 | min = max; |
312 | break; |
313 | default: |
314 | if (level == 0) { |
315 | if (Py_ISALPHA(c)) |
316 | if (c != 'e') /* skip encoded */ |
317 | max++; |
318 | } |
319 | break; |
320 | } |
321 | } |
322 | |
323 | if (level != 0) |
324 | Py_FatalError(/* '(' */ "missing ')' in getargs format" ); |
325 | |
326 | if (min < 0) |
327 | min = max; |
328 | |
329 | format = formatsave; |
330 | |
331 | if (max > STATIC_FREELIST_ENTRIES) { |
332 | freelist.entries = PyMem_NEW(freelistentry_t, max); |
333 | if (freelist.entries == NULL) { |
334 | PyErr_NoMemory(); |
335 | return 0; |
336 | } |
337 | freelist.entries_malloced = 1; |
338 | } |
339 | |
340 | if (compat) { |
341 | if (max == 0) { |
342 | if (compat_args == NULL) |
343 | return 1; |
344 | PyErr_Format(PyExc_TypeError, |
345 | "%.200s%s takes no arguments" , |
346 | fname==NULL ? "function" : fname, |
347 | fname==NULL ? "" : "()" ); |
348 | return cleanreturn(0, &freelist); |
349 | } |
350 | else if (min == 1 && max == 1) { |
351 | if (compat_args == NULL) { |
352 | PyErr_Format(PyExc_TypeError, |
353 | "%.200s%s takes at least one argument" , |
354 | fname==NULL ? "function" : fname, |
355 | fname==NULL ? "" : "()" ); |
356 | return cleanreturn(0, &freelist); |
357 | } |
358 | msg = convertitem(compat_args, &format, p_va, flags, levels, |
359 | msgbuf, sizeof(msgbuf), &freelist); |
360 | if (msg == NULL) |
361 | return cleanreturn(1, &freelist); |
362 | seterror(levels[0], msg, levels+1, fname, message); |
363 | return cleanreturn(0, &freelist); |
364 | } |
365 | else { |
366 | PyErr_SetString(PyExc_SystemError, |
367 | "old style getargs format uses new features" ); |
368 | return cleanreturn(0, &freelist); |
369 | } |
370 | } |
371 | |
372 | if (nargs < min || max < nargs) { |
373 | if (message == NULL) |
374 | PyErr_Format(PyExc_TypeError, |
375 | "%.150s%s takes %s %d argument%s (%zd given)" , |
376 | fname==NULL ? "function" : fname, |
377 | fname==NULL ? "" : "()" , |
378 | min==max ? "exactly" |
379 | : nargs < min ? "at least" : "at most" , |
380 | nargs < min ? min : max, |
381 | (nargs < min ? min : max) == 1 ? "" : "s" , |
382 | nargs); |
383 | else |
384 | PyErr_SetString(PyExc_TypeError, message); |
385 | return cleanreturn(0, &freelist); |
386 | } |
387 | |
388 | for (i = 0; i < nargs; i++) { |
389 | if (*format == '|') |
390 | format++; |
391 | msg = convertitem(stack[i], &format, p_va, |
392 | flags, levels, msgbuf, |
393 | sizeof(msgbuf), &freelist); |
394 | if (msg) { |
395 | seterror(i+1, msg, levels, fname, message); |
396 | return cleanreturn(0, &freelist); |
397 | } |
398 | } |
399 | |
400 | if (*format != '\0' && !Py_ISALPHA(*format) && |
401 | *format != '(' && |
402 | *format != '|' && *format != ':' && *format != ';') { |
403 | PyErr_Format(PyExc_SystemError, |
404 | "bad format string: %.200s" , formatsave); |
405 | return cleanreturn(0, &freelist); |
406 | } |
407 | |
408 | return cleanreturn(1, &freelist); |
409 | } |
410 | |
411 | static int |
412 | vgetargs1(PyObject *args, const char *format, va_list *p_va, int flags) |
413 | { |
414 | PyObject **stack; |
415 | Py_ssize_t nargs; |
416 | |
417 | if (!(flags & FLAG_COMPAT)) { |
418 | assert(args != NULL); |
419 | |
420 | if (!PyTuple_Check(args)) { |
421 | PyErr_SetString(PyExc_SystemError, |
422 | "new style getargs format but argument is not a tuple" ); |
423 | return 0; |
424 | } |
425 | |
426 | stack = _PyTuple_ITEMS(args); |
427 | nargs = PyTuple_GET_SIZE(args); |
428 | } |
429 | else { |
430 | stack = NULL; |
431 | nargs = 0; |
432 | } |
433 | |
434 | return vgetargs1_impl(args, stack, nargs, format, p_va, flags); |
435 | } |
436 | |
437 | |
438 | static void |
439 | seterror(Py_ssize_t iarg, const char *msg, int *levels, const char *fname, |
440 | const char *message) |
441 | { |
442 | char buf[512]; |
443 | int i; |
444 | char *p = buf; |
445 | |
446 | if (PyErr_Occurred()) |
447 | return; |
448 | else if (message == NULL) { |
449 | if (fname != NULL) { |
450 | PyOS_snprintf(p, sizeof(buf), "%.200s() " , fname); |
451 | p += strlen(p); |
452 | } |
453 | if (iarg != 0) { |
454 | PyOS_snprintf(p, sizeof(buf) - (p - buf), |
455 | "argument %zd" , iarg); |
456 | i = 0; |
457 | p += strlen(p); |
458 | while (i < 32 && levels[i] > 0 && (int)(p-buf) < 220) { |
459 | PyOS_snprintf(p, sizeof(buf) - (p - buf), |
460 | ", item %d" , levels[i]-1); |
461 | p += strlen(p); |
462 | i++; |
463 | } |
464 | } |
465 | else { |
466 | PyOS_snprintf(p, sizeof(buf) - (p - buf), "argument" ); |
467 | p += strlen(p); |
468 | } |
469 | PyOS_snprintf(p, sizeof(buf) - (p - buf), " %.256s" , msg); |
470 | message = buf; |
471 | } |
472 | if (msg[0] == '(') { |
473 | PyErr_SetString(PyExc_SystemError, message); |
474 | } |
475 | else { |
476 | PyErr_SetString(PyExc_TypeError, message); |
477 | } |
478 | } |
479 | |
480 | |
481 | /* Convert a tuple argument. |
482 | On entry, *p_format points to the character _after_ the opening '('. |
483 | On successful exit, *p_format points to the closing ')'. |
484 | If successful: |
485 | *p_format and *p_va are updated, |
486 | *levels and *msgbuf are untouched, |
487 | and NULL is returned. |
488 | If the argument is invalid: |
489 | *p_format is unchanged, |
490 | *p_va is undefined, |
491 | *levels is a 0-terminated list of item numbers, |
492 | *msgbuf contains an error message, whose format is: |
493 | "must be <typename1>, not <typename2>", where: |
494 | <typename1> is the name of the expected type, and |
495 | <typename2> is the name of the actual type, |
496 | and msgbuf is returned. |
497 | */ |
498 | |
499 | static const char * |
500 | converttuple(PyObject *arg, const char **p_format, va_list *p_va, int flags, |
501 | int *levels, char *msgbuf, size_t bufsize, int toplevel, |
502 | freelist_t *freelist) |
503 | { |
504 | int level = 0; |
505 | int n = 0; |
506 | const char *format = *p_format; |
507 | int i; |
508 | Py_ssize_t len; |
509 | |
510 | for (;;) { |
511 | int c = *format++; |
512 | if (c == '(') { |
513 | if (level == 0) |
514 | n++; |
515 | level++; |
516 | } |
517 | else if (c == ')') { |
518 | if (level == 0) |
519 | break; |
520 | level--; |
521 | } |
522 | else if (c == ':' || c == ';' || c == '\0') |
523 | break; |
524 | else if (level == 0 && Py_ISALPHA(c)) |
525 | n++; |
526 | } |
527 | |
528 | if (!PySequence_Check(arg) || PyBytes_Check(arg)) { |
529 | levels[0] = 0; |
530 | PyOS_snprintf(msgbuf, bufsize, |
531 | toplevel ? "expected %d arguments, not %.50s" : |
532 | "must be %d-item sequence, not %.50s" , |
533 | n, |
534 | arg == Py_None ? "None" : Py_TYPE(arg)->tp_name); |
535 | return msgbuf; |
536 | } |
537 | |
538 | len = PySequence_Size(arg); |
539 | if (len != n) { |
540 | levels[0] = 0; |
541 | if (toplevel) { |
542 | PyOS_snprintf(msgbuf, bufsize, |
543 | "expected %d argument%s, not %zd" , |
544 | n, |
545 | n == 1 ? "" : "s" , |
546 | len); |
547 | } |
548 | else { |
549 | PyOS_snprintf(msgbuf, bufsize, |
550 | "must be sequence of length %d, not %zd" , |
551 | n, len); |
552 | } |
553 | return msgbuf; |
554 | } |
555 | |
556 | format = *p_format; |
557 | for (i = 0; i < n; i++) { |
558 | const char *msg; |
559 | PyObject *item; |
560 | item = PySequence_GetItem(arg, i); |
561 | if (item == NULL) { |
562 | PyErr_Clear(); |
563 | levels[0] = i+1; |
564 | levels[1] = 0; |
565 | strncpy(msgbuf, "is not retrievable" , bufsize); |
566 | return msgbuf; |
567 | } |
568 | msg = convertitem(item, &format, p_va, flags, levels+1, |
569 | msgbuf, bufsize, freelist); |
570 | /* PySequence_GetItem calls tp->sq_item, which INCREFs */ |
571 | Py_XDECREF(item); |
572 | if (msg != NULL) { |
573 | levels[0] = i+1; |
574 | return msg; |
575 | } |
576 | } |
577 | |
578 | *p_format = format; |
579 | return NULL; |
580 | } |
581 | |
582 | |
583 | /* Convert a single item. */ |
584 | |
585 | static const char * |
586 | convertitem(PyObject *arg, const char **p_format, va_list *p_va, int flags, |
587 | int *levels, char *msgbuf, size_t bufsize, freelist_t *freelist) |
588 | { |
589 | const char *msg; |
590 | const char *format = *p_format; |
591 | |
592 | if (*format == '(' /* ')' */) { |
593 | format++; |
594 | msg = converttuple(arg, &format, p_va, flags, levels, msgbuf, |
595 | bufsize, 0, freelist); |
596 | if (msg == NULL) |
597 | format++; |
598 | } |
599 | else { |
600 | msg = convertsimple(arg, &format, p_va, flags, |
601 | msgbuf, bufsize, freelist); |
602 | if (msg != NULL) |
603 | levels[0] = 0; |
604 | } |
605 | if (msg == NULL) |
606 | *p_format = format; |
607 | return msg; |
608 | } |
609 | |
610 | |
611 | |
612 | /* Format an error message generated by convertsimple(). |
613 | displayname must be UTF-8 encoded. |
614 | */ |
615 | |
616 | void |
617 | _PyArg_BadArgument(const char *fname, const char *displayname, |
618 | const char *expected, PyObject *arg) |
619 | { |
620 | PyErr_Format(PyExc_TypeError, |
621 | "%.200s() %.200s must be %.50s, not %.50s" , |
622 | fname, displayname, expected, |
623 | arg == Py_None ? "None" : Py_TYPE(arg)->tp_name); |
624 | } |
625 | |
626 | static const char * |
627 | converterr(const char *expected, PyObject *arg, char *msgbuf, size_t bufsize) |
628 | { |
629 | assert(expected != NULL); |
630 | assert(arg != NULL); |
631 | if (expected[0] == '(') { |
632 | PyOS_snprintf(msgbuf, bufsize, |
633 | "%.100s" , expected); |
634 | } |
635 | else { |
636 | PyOS_snprintf(msgbuf, bufsize, |
637 | "must be %.50s, not %.50s" , expected, |
638 | arg == Py_None ? "None" : Py_TYPE(arg)->tp_name); |
639 | } |
640 | return msgbuf; |
641 | } |
642 | |
643 | #define CONV_UNICODE "(unicode conversion error)" |
644 | |
645 | /* Convert a non-tuple argument. Return NULL if conversion went OK, |
646 | or a string with a message describing the failure. The message is |
647 | formatted as "must be <desired type>, not <actual type>". |
648 | When failing, an exception may or may not have been raised. |
649 | Don't call if a tuple is expected. |
650 | |
651 | When you add new format codes, please don't forget poor skipitem() below. |
652 | */ |
653 | |
654 | static const char * |
655 | convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags, |
656 | char *msgbuf, size_t bufsize, freelist_t *freelist) |
657 | { |
658 | #define RETURN_ERR_OCCURRED return msgbuf |
659 | /* For # codes */ |
660 | #define REQUIRE_PY_SSIZE_T_CLEAN \ |
661 | if (!(flags & FLAG_SIZE_T)) { \ |
662 | PyErr_SetString(PyExc_SystemError, \ |
663 | "PY_SSIZE_T_CLEAN macro must be defined for '#' formats"); \ |
664 | RETURN_ERR_OCCURRED; \ |
665 | } |
666 | |
667 | const char *format = *p_format; |
668 | char c = *format++; |
669 | const char *sarg; |
670 | |
671 | switch (c) { |
672 | |
673 | case 'b': { /* unsigned byte -- very short int */ |
674 | char *p = va_arg(*p_va, char *); |
675 | long ival = PyLong_AsLong(arg); |
676 | if (ival == -1 && PyErr_Occurred()) |
677 | RETURN_ERR_OCCURRED; |
678 | else if (ival < 0) { |
679 | PyErr_SetString(PyExc_OverflowError, |
680 | "unsigned byte integer is less than minimum" ); |
681 | RETURN_ERR_OCCURRED; |
682 | } |
683 | else if (ival > UCHAR_MAX) { |
684 | PyErr_SetString(PyExc_OverflowError, |
685 | "unsigned byte integer is greater than maximum" ); |
686 | RETURN_ERR_OCCURRED; |
687 | } |
688 | else |
689 | *p = (unsigned char) ival; |
690 | break; |
691 | } |
692 | |
693 | case 'B': {/* byte sized bitfield - both signed and unsigned |
694 | values allowed */ |
695 | char *p = va_arg(*p_va, char *); |
696 | unsigned long ival = PyLong_AsUnsignedLongMask(arg); |
697 | if (ival == (unsigned long)-1 && PyErr_Occurred()) |
698 | RETURN_ERR_OCCURRED; |
699 | else |
700 | *p = (unsigned char) ival; |
701 | break; |
702 | } |
703 | |
704 | case 'h': {/* signed short int */ |
705 | short *p = va_arg(*p_va, short *); |
706 | long ival = PyLong_AsLong(arg); |
707 | if (ival == -1 && PyErr_Occurred()) |
708 | RETURN_ERR_OCCURRED; |
709 | else if (ival < SHRT_MIN) { |
710 | PyErr_SetString(PyExc_OverflowError, |
711 | "signed short integer is less than minimum" ); |
712 | RETURN_ERR_OCCURRED; |
713 | } |
714 | else if (ival > SHRT_MAX) { |
715 | PyErr_SetString(PyExc_OverflowError, |
716 | "signed short integer is greater than maximum" ); |
717 | RETURN_ERR_OCCURRED; |
718 | } |
719 | else |
720 | *p = (short) ival; |
721 | break; |
722 | } |
723 | |
724 | case 'H': { /* short int sized bitfield, both signed and |
725 | unsigned allowed */ |
726 | unsigned short *p = va_arg(*p_va, unsigned short *); |
727 | unsigned long ival = PyLong_AsUnsignedLongMask(arg); |
728 | if (ival == (unsigned long)-1 && PyErr_Occurred()) |
729 | RETURN_ERR_OCCURRED; |
730 | else |
731 | *p = (unsigned short) ival; |
732 | break; |
733 | } |
734 | |
735 | case 'i': {/* signed int */ |
736 | int *p = va_arg(*p_va, int *); |
737 | long ival = PyLong_AsLong(arg); |
738 | if (ival == -1 && PyErr_Occurred()) |
739 | RETURN_ERR_OCCURRED; |
740 | else if (ival > INT_MAX) { |
741 | PyErr_SetString(PyExc_OverflowError, |
742 | "signed integer is greater than maximum" ); |
743 | RETURN_ERR_OCCURRED; |
744 | } |
745 | else if (ival < INT_MIN) { |
746 | PyErr_SetString(PyExc_OverflowError, |
747 | "signed integer is less than minimum" ); |
748 | RETURN_ERR_OCCURRED; |
749 | } |
750 | else |
751 | *p = ival; |
752 | break; |
753 | } |
754 | |
755 | case 'I': { /* int sized bitfield, both signed and |
756 | unsigned allowed */ |
757 | unsigned int *p = va_arg(*p_va, unsigned int *); |
758 | unsigned long ival = PyLong_AsUnsignedLongMask(arg); |
759 | if (ival == (unsigned long)-1 && PyErr_Occurred()) |
760 | RETURN_ERR_OCCURRED; |
761 | else |
762 | *p = (unsigned int) ival; |
763 | break; |
764 | } |
765 | |
766 | case 'n': /* Py_ssize_t */ |
767 | { |
768 | PyObject *iobj; |
769 | Py_ssize_t *p = va_arg(*p_va, Py_ssize_t *); |
770 | Py_ssize_t ival = -1; |
771 | iobj = _PyNumber_Index(arg); |
772 | if (iobj != NULL) { |
773 | ival = PyLong_AsSsize_t(iobj); |
774 | Py_DECREF(iobj); |
775 | } |
776 | if (ival == -1 && PyErr_Occurred()) |
777 | RETURN_ERR_OCCURRED; |
778 | *p = ival; |
779 | break; |
780 | } |
781 | case 'l': {/* long int */ |
782 | long *p = va_arg(*p_va, long *); |
783 | long ival = PyLong_AsLong(arg); |
784 | if (ival == -1 && PyErr_Occurred()) |
785 | RETURN_ERR_OCCURRED; |
786 | else |
787 | *p = ival; |
788 | break; |
789 | } |
790 | |
791 | case 'k': { /* long sized bitfield */ |
792 | unsigned long *p = va_arg(*p_va, unsigned long *); |
793 | unsigned long ival; |
794 | if (PyLong_Check(arg)) |
795 | ival = PyLong_AsUnsignedLongMask(arg); |
796 | else |
797 | return converterr("int" , arg, msgbuf, bufsize); |
798 | *p = ival; |
799 | break; |
800 | } |
801 | |
802 | case 'L': {/* long long */ |
803 | long long *p = va_arg( *p_va, long long * ); |
804 | long long ival = PyLong_AsLongLong(arg); |
805 | if (ival == (long long)-1 && PyErr_Occurred()) |
806 | RETURN_ERR_OCCURRED; |
807 | else |
808 | *p = ival; |
809 | break; |
810 | } |
811 | |
812 | case 'K': { /* long long sized bitfield */ |
813 | unsigned long long *p = va_arg(*p_va, unsigned long long *); |
814 | unsigned long long ival; |
815 | if (PyLong_Check(arg)) |
816 | ival = PyLong_AsUnsignedLongLongMask(arg); |
817 | else |
818 | return converterr("int" , arg, msgbuf, bufsize); |
819 | *p = ival; |
820 | break; |
821 | } |
822 | |
823 | case 'f': {/* float */ |
824 | float *p = va_arg(*p_va, float *); |
825 | double dval = PyFloat_AsDouble(arg); |
826 | if (dval == -1.0 && PyErr_Occurred()) |
827 | RETURN_ERR_OCCURRED; |
828 | else |
829 | *p = (float) dval; |
830 | break; |
831 | } |
832 | |
833 | case 'd': {/* double */ |
834 | double *p = va_arg(*p_va, double *); |
835 | double dval = PyFloat_AsDouble(arg); |
836 | if (dval == -1.0 && PyErr_Occurred()) |
837 | RETURN_ERR_OCCURRED; |
838 | else |
839 | *p = dval; |
840 | break; |
841 | } |
842 | |
843 | case 'D': {/* complex double */ |
844 | Py_complex *p = va_arg(*p_va, Py_complex *); |
845 | Py_complex cval; |
846 | cval = PyComplex_AsCComplex(arg); |
847 | if (PyErr_Occurred()) |
848 | RETURN_ERR_OCCURRED; |
849 | else |
850 | *p = cval; |
851 | break; |
852 | } |
853 | |
854 | case 'c': {/* char */ |
855 | char *p = va_arg(*p_va, char *); |
856 | if (PyBytes_Check(arg) && PyBytes_Size(arg) == 1) |
857 | *p = PyBytes_AS_STRING(arg)[0]; |
858 | else if (PyByteArray_Check(arg) && PyByteArray_Size(arg) == 1) |
859 | *p = PyByteArray_AS_STRING(arg)[0]; |
860 | else |
861 | return converterr("a byte string of length 1" , arg, msgbuf, bufsize); |
862 | break; |
863 | } |
864 | |
865 | case 'C': {/* unicode char */ |
866 | int *p = va_arg(*p_va, int *); |
867 | int kind; |
868 | const void *data; |
869 | |
870 | if (!PyUnicode_Check(arg)) |
871 | return converterr("a unicode character" , arg, msgbuf, bufsize); |
872 | |
873 | if (PyUnicode_READY(arg)) |
874 | RETURN_ERR_OCCURRED; |
875 | |
876 | if (PyUnicode_GET_LENGTH(arg) != 1) |
877 | return converterr("a unicode character" , arg, msgbuf, bufsize); |
878 | |
879 | kind = PyUnicode_KIND(arg); |
880 | data = PyUnicode_DATA(arg); |
881 | *p = PyUnicode_READ(kind, data, 0); |
882 | break; |
883 | } |
884 | |
885 | case 'p': {/* boolean *p*redicate */ |
886 | int *p = va_arg(*p_va, int *); |
887 | int val = PyObject_IsTrue(arg); |
888 | if (val > 0) |
889 | *p = 1; |
890 | else if (val == 0) |
891 | *p = 0; |
892 | else |
893 | RETURN_ERR_OCCURRED; |
894 | break; |
895 | } |
896 | |
897 | /* XXX WAAAAH! 's', 'y', 'z', 'u', 'Z', 'e', 'w' codes all |
898 | need to be cleaned up! */ |
899 | |
900 | case 'y': {/* any bytes-like object */ |
901 | void **p = (void **)va_arg(*p_va, char **); |
902 | const char *buf; |
903 | Py_ssize_t count; |
904 | if (*format == '*') { |
905 | if (getbuffer(arg, (Py_buffer*)p, &buf) < 0) |
906 | return converterr(buf, arg, msgbuf, bufsize); |
907 | format++; |
908 | if (addcleanup(p, freelist, cleanup_buffer)) { |
909 | return converterr( |
910 | "(cleanup problem)" , |
911 | arg, msgbuf, bufsize); |
912 | } |
913 | break; |
914 | } |
915 | count = convertbuffer(arg, (const void **)p, &buf); |
916 | if (count < 0) |
917 | return converterr(buf, arg, msgbuf, bufsize); |
918 | if (*format == '#') { |
919 | REQUIRE_PY_SSIZE_T_CLEAN; |
920 | Py_ssize_t *psize = va_arg(*p_va, Py_ssize_t*); |
921 | *psize = count; |
922 | format++; |
923 | } else { |
924 | if (strlen(*p) != (size_t)count) { |
925 | PyErr_SetString(PyExc_ValueError, "embedded null byte" ); |
926 | RETURN_ERR_OCCURRED; |
927 | } |
928 | } |
929 | break; |
930 | } |
931 | |
932 | case 's': /* text string or bytes-like object */ |
933 | case 'z': /* text string, bytes-like object or None */ |
934 | { |
935 | if (*format == '*') { |
936 | /* "s*" or "z*" */ |
937 | Py_buffer *p = (Py_buffer *)va_arg(*p_va, Py_buffer *); |
938 | |
939 | if (c == 'z' && arg == Py_None) |
940 | PyBuffer_FillInfo(p, NULL, NULL, 0, 1, 0); |
941 | else if (PyUnicode_Check(arg)) { |
942 | Py_ssize_t len; |
943 | sarg = PyUnicode_AsUTF8AndSize(arg, &len); |
944 | if (sarg == NULL) |
945 | return converterr(CONV_UNICODE, |
946 | arg, msgbuf, bufsize); |
947 | PyBuffer_FillInfo(p, arg, (void *)sarg, len, 1, 0); |
948 | } |
949 | else { /* any bytes-like object */ |
950 | const char *buf; |
951 | if (getbuffer(arg, p, &buf) < 0) |
952 | return converterr(buf, arg, msgbuf, bufsize); |
953 | } |
954 | if (addcleanup(p, freelist, cleanup_buffer)) { |
955 | return converterr( |
956 | "(cleanup problem)" , |
957 | arg, msgbuf, bufsize); |
958 | } |
959 | format++; |
960 | } else if (*format == '#') { /* a string or read-only bytes-like object */ |
961 | /* "s#" or "z#" */ |
962 | const void **p = (const void **)va_arg(*p_va, const char **); |
963 | REQUIRE_PY_SSIZE_T_CLEAN; |
964 | Py_ssize_t *psize = va_arg(*p_va, Py_ssize_t*); |
965 | |
966 | if (c == 'z' && arg == Py_None) { |
967 | *p = NULL; |
968 | *psize = 0; |
969 | } |
970 | else if (PyUnicode_Check(arg)) { |
971 | Py_ssize_t len; |
972 | sarg = PyUnicode_AsUTF8AndSize(arg, &len); |
973 | if (sarg == NULL) |
974 | return converterr(CONV_UNICODE, |
975 | arg, msgbuf, bufsize); |
976 | *p = sarg; |
977 | *psize = len; |
978 | } |
979 | else { /* read-only bytes-like object */ |
980 | /* XXX Really? */ |
981 | const char *buf; |
982 | Py_ssize_t count = convertbuffer(arg, p, &buf); |
983 | if (count < 0) |
984 | return converterr(buf, arg, msgbuf, bufsize); |
985 | *psize = count; |
986 | } |
987 | format++; |
988 | } else { |
989 | /* "s" or "z" */ |
990 | const char **p = va_arg(*p_va, const char **); |
991 | Py_ssize_t len; |
992 | sarg = NULL; |
993 | |
994 | if (c == 'z' && arg == Py_None) |
995 | *p = NULL; |
996 | else if (PyUnicode_Check(arg)) { |
997 | sarg = PyUnicode_AsUTF8AndSize(arg, &len); |
998 | if (sarg == NULL) |
999 | return converterr(CONV_UNICODE, |
1000 | arg, msgbuf, bufsize); |
1001 | if (strlen(sarg) != (size_t)len) { |
1002 | PyErr_SetString(PyExc_ValueError, "embedded null character" ); |
1003 | RETURN_ERR_OCCURRED; |
1004 | } |
1005 | *p = sarg; |
1006 | } |
1007 | else |
1008 | return converterr(c == 'z' ? "str or None" : "str" , |
1009 | arg, msgbuf, bufsize); |
1010 | } |
1011 | break; |
1012 | } |
1013 | |
1014 | case 'u': /* raw unicode buffer (Py_UNICODE *) */ |
1015 | case 'Z': /* raw unicode buffer or None */ |
1016 | { |
1017 | if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1, |
1018 | "getargs: The '%c' format is deprecated. Use 'U' instead." , c)) { |
1019 | return NULL; |
1020 | } |
1021 | _Py_COMP_DIAG_PUSH |
1022 | _Py_COMP_DIAG_IGNORE_DEPR_DECLS |
1023 | Py_UNICODE **p = va_arg(*p_va, Py_UNICODE **); |
1024 | |
1025 | if (*format == '#') { |
1026 | /* "u#" or "Z#" */ |
1027 | REQUIRE_PY_SSIZE_T_CLEAN; |
1028 | Py_ssize_t *psize = va_arg(*p_va, Py_ssize_t*); |
1029 | |
1030 | if (c == 'Z' && arg == Py_None) { |
1031 | *p = NULL; |
1032 | *psize = 0; |
1033 | } |
1034 | else if (PyUnicode_Check(arg)) { |
1035 | Py_ssize_t len; |
1036 | *p = PyUnicode_AsUnicodeAndSize(arg, &len); |
1037 | if (*p == NULL) |
1038 | RETURN_ERR_OCCURRED; |
1039 | *psize = len; |
1040 | } |
1041 | else |
1042 | return converterr(c == 'Z' ? "str or None" : "str" , |
1043 | arg, msgbuf, bufsize); |
1044 | format++; |
1045 | } else { |
1046 | /* "u" or "Z" */ |
1047 | if (c == 'Z' && arg == Py_None) |
1048 | *p = NULL; |
1049 | else if (PyUnicode_Check(arg)) { |
1050 | Py_ssize_t len; |
1051 | *p = PyUnicode_AsUnicodeAndSize(arg, &len); |
1052 | if (*p == NULL) |
1053 | RETURN_ERR_OCCURRED; |
1054 | if (wcslen(*p) != (size_t)len) { |
1055 | PyErr_SetString(PyExc_ValueError, "embedded null character" ); |
1056 | RETURN_ERR_OCCURRED; |
1057 | } |
1058 | } else |
1059 | return converterr(c == 'Z' ? "str or None" : "str" , |
1060 | arg, msgbuf, bufsize); |
1061 | } |
1062 | break; |
1063 | _Py_COMP_DIAG_POP |
1064 | } |
1065 | |
1066 | case 'e': {/* encoded string */ |
1067 | char **buffer; |
1068 | const char *encoding; |
1069 | PyObject *s; |
1070 | int recode_strings; |
1071 | Py_ssize_t size; |
1072 | const char *ptr; |
1073 | |
1074 | /* Get 'e' parameter: the encoding name */ |
1075 | encoding = (const char *)va_arg(*p_va, const char *); |
1076 | if (encoding == NULL) |
1077 | encoding = PyUnicode_GetDefaultEncoding(); |
1078 | |
1079 | /* Get output buffer parameter: |
1080 | 's' (recode all objects via Unicode) or |
1081 | 't' (only recode non-string objects) |
1082 | */ |
1083 | if (*format == 's') |
1084 | recode_strings = 1; |
1085 | else if (*format == 't') |
1086 | recode_strings = 0; |
1087 | else |
1088 | return converterr( |
1089 | "(unknown parser marker combination)" , |
1090 | arg, msgbuf, bufsize); |
1091 | buffer = (char **)va_arg(*p_va, char **); |
1092 | format++; |
1093 | if (buffer == NULL) |
1094 | return converterr("(buffer is NULL)" , |
1095 | arg, msgbuf, bufsize); |
1096 | |
1097 | /* Encode object */ |
1098 | if (!recode_strings && |
1099 | (PyBytes_Check(arg) || PyByteArray_Check(arg))) { |
1100 | s = arg; |
1101 | Py_INCREF(s); |
1102 | if (PyBytes_Check(arg)) { |
1103 | size = PyBytes_GET_SIZE(s); |
1104 | ptr = PyBytes_AS_STRING(s); |
1105 | } |
1106 | else { |
1107 | size = PyByteArray_GET_SIZE(s); |
1108 | ptr = PyByteArray_AS_STRING(s); |
1109 | } |
1110 | } |
1111 | else if (PyUnicode_Check(arg)) { |
1112 | /* Encode object; use default error handling */ |
1113 | s = PyUnicode_AsEncodedString(arg, |
1114 | encoding, |
1115 | NULL); |
1116 | if (s == NULL) |
1117 | return converterr("(encoding failed)" , |
1118 | arg, msgbuf, bufsize); |
1119 | assert(PyBytes_Check(s)); |
1120 | size = PyBytes_GET_SIZE(s); |
1121 | ptr = PyBytes_AS_STRING(s); |
1122 | if (ptr == NULL) |
1123 | ptr = "" ; |
1124 | } |
1125 | else { |
1126 | return converterr( |
1127 | recode_strings ? "str" : "str, bytes or bytearray" , |
1128 | arg, msgbuf, bufsize); |
1129 | } |
1130 | |
1131 | /* Write output; output is guaranteed to be 0-terminated */ |
1132 | if (*format == '#') { |
1133 | /* Using buffer length parameter '#': |
1134 | |
1135 | - if *buffer is NULL, a new buffer of the |
1136 | needed size is allocated and the data |
1137 | copied into it; *buffer is updated to point |
1138 | to the new buffer; the caller is |
1139 | responsible for PyMem_Free()ing it after |
1140 | usage |
1141 | |
1142 | - if *buffer is not NULL, the data is |
1143 | copied to *buffer; *buffer_len has to be |
1144 | set to the size of the buffer on input; |
1145 | buffer overflow is signalled with an error; |
1146 | buffer has to provide enough room for the |
1147 | encoded string plus the trailing 0-byte |
1148 | |
1149 | - in both cases, *buffer_len is updated to |
1150 | the size of the buffer /excluding/ the |
1151 | trailing 0-byte |
1152 | |
1153 | */ |
1154 | REQUIRE_PY_SSIZE_T_CLEAN; |
1155 | Py_ssize_t *psize = va_arg(*p_va, Py_ssize_t*); |
1156 | |
1157 | format++; |
1158 | if (psize == NULL) { |
1159 | Py_DECREF(s); |
1160 | return converterr( |
1161 | "(buffer_len is NULL)" , |
1162 | arg, msgbuf, bufsize); |
1163 | } |
1164 | if (*buffer == NULL) { |
1165 | *buffer = PyMem_NEW(char, size + 1); |
1166 | if (*buffer == NULL) { |
1167 | Py_DECREF(s); |
1168 | PyErr_NoMemory(); |
1169 | RETURN_ERR_OCCURRED; |
1170 | } |
1171 | if (addcleanup(*buffer, freelist, cleanup_ptr)) { |
1172 | Py_DECREF(s); |
1173 | return converterr( |
1174 | "(cleanup problem)" , |
1175 | arg, msgbuf, bufsize); |
1176 | } |
1177 | } else { |
1178 | if (size + 1 > *psize) { |
1179 | Py_DECREF(s); |
1180 | PyErr_Format(PyExc_ValueError, |
1181 | "encoded string too long " |
1182 | "(%zd, maximum length %zd)" , |
1183 | (Py_ssize_t)size, (Py_ssize_t)(*psize - 1)); |
1184 | RETURN_ERR_OCCURRED; |
1185 | } |
1186 | } |
1187 | memcpy(*buffer, ptr, size+1); |
1188 | |
1189 | *psize = size; |
1190 | } |
1191 | else { |
1192 | /* Using a 0-terminated buffer: |
1193 | |
1194 | - the encoded string has to be 0-terminated |
1195 | for this variant to work; if it is not, an |
1196 | error raised |
1197 | |
1198 | - a new buffer of the needed size is |
1199 | allocated and the data copied into it; |
1200 | *buffer is updated to point to the new |
1201 | buffer; the caller is responsible for |
1202 | PyMem_Free()ing it after usage |
1203 | |
1204 | */ |
1205 | if ((Py_ssize_t)strlen(ptr) != size) { |
1206 | Py_DECREF(s); |
1207 | return converterr( |
1208 | "encoded string without null bytes" , |
1209 | arg, msgbuf, bufsize); |
1210 | } |
1211 | *buffer = PyMem_NEW(char, size + 1); |
1212 | if (*buffer == NULL) { |
1213 | Py_DECREF(s); |
1214 | PyErr_NoMemory(); |
1215 | RETURN_ERR_OCCURRED; |
1216 | } |
1217 | if (addcleanup(*buffer, freelist, cleanup_ptr)) { |
1218 | Py_DECREF(s); |
1219 | return converterr("(cleanup problem)" , |
1220 | arg, msgbuf, bufsize); |
1221 | } |
1222 | memcpy(*buffer, ptr, size+1); |
1223 | } |
1224 | Py_DECREF(s); |
1225 | break; |
1226 | } |
1227 | |
1228 | case 'S': { /* PyBytes object */ |
1229 | PyObject **p = va_arg(*p_va, PyObject **); |
1230 | if (PyBytes_Check(arg)) |
1231 | *p = arg; |
1232 | else |
1233 | return converterr("bytes" , arg, msgbuf, bufsize); |
1234 | break; |
1235 | } |
1236 | |
1237 | case 'Y': { /* PyByteArray object */ |
1238 | PyObject **p = va_arg(*p_va, PyObject **); |
1239 | if (PyByteArray_Check(arg)) |
1240 | *p = arg; |
1241 | else |
1242 | return converterr("bytearray" , arg, msgbuf, bufsize); |
1243 | break; |
1244 | } |
1245 | |
1246 | case 'U': { /* PyUnicode object */ |
1247 | PyObject **p = va_arg(*p_va, PyObject **); |
1248 | if (PyUnicode_Check(arg)) { |
1249 | if (PyUnicode_READY(arg) == -1) |
1250 | RETURN_ERR_OCCURRED; |
1251 | *p = arg; |
1252 | } |
1253 | else |
1254 | return converterr("str" , arg, msgbuf, bufsize); |
1255 | break; |
1256 | } |
1257 | |
1258 | case 'O': { /* object */ |
1259 | PyTypeObject *type; |
1260 | PyObject **p; |
1261 | if (*format == '!') { |
1262 | type = va_arg(*p_va, PyTypeObject*); |
1263 | p = va_arg(*p_va, PyObject **); |
1264 | format++; |
1265 | if (PyType_IsSubtype(Py_TYPE(arg), type)) |
1266 | *p = arg; |
1267 | else |
1268 | return converterr(type->tp_name, arg, msgbuf, bufsize); |
1269 | |
1270 | } |
1271 | else if (*format == '&') { |
1272 | typedef int (*converter)(PyObject *, void *); |
1273 | converter convert = va_arg(*p_va, converter); |
1274 | void *addr = va_arg(*p_va, void *); |
1275 | int res; |
1276 | format++; |
1277 | if (! (res = (*convert)(arg, addr))) |
1278 | return converterr("(unspecified)" , |
1279 | arg, msgbuf, bufsize); |
1280 | if (res == Py_CLEANUP_SUPPORTED && |
1281 | addcleanup(addr, freelist, convert) == -1) |
1282 | return converterr("(cleanup problem)" , |
1283 | arg, msgbuf, bufsize); |
1284 | } |
1285 | else { |
1286 | p = va_arg(*p_va, PyObject **); |
1287 | *p = arg; |
1288 | } |
1289 | break; |
1290 | } |
1291 | |
1292 | |
1293 | case 'w': { /* "w*": memory buffer, read-write access */ |
1294 | void **p = va_arg(*p_va, void **); |
1295 | |
1296 | if (*format != '*') |
1297 | return converterr( |
1298 | "(invalid use of 'w' format character)" , |
1299 | arg, msgbuf, bufsize); |
1300 | format++; |
1301 | |
1302 | /* Caller is interested in Py_buffer, and the object |
1303 | supports it directly. */ |
1304 | if (PyObject_GetBuffer(arg, (Py_buffer*)p, PyBUF_WRITABLE) < 0) { |
1305 | PyErr_Clear(); |
1306 | return converterr("read-write bytes-like object" , |
1307 | arg, msgbuf, bufsize); |
1308 | } |
1309 | if (!PyBuffer_IsContiguous((Py_buffer*)p, 'C')) { |
1310 | PyBuffer_Release((Py_buffer*)p); |
1311 | return converterr("contiguous buffer" , arg, msgbuf, bufsize); |
1312 | } |
1313 | if (addcleanup(p, freelist, cleanup_buffer)) { |
1314 | return converterr( |
1315 | "(cleanup problem)" , |
1316 | arg, msgbuf, bufsize); |
1317 | } |
1318 | break; |
1319 | } |
1320 | |
1321 | default: |
1322 | return converterr("(impossible<bad format char>)" , arg, msgbuf, bufsize); |
1323 | |
1324 | } |
1325 | |
1326 | *p_format = format; |
1327 | return NULL; |
1328 | |
1329 | #undef REQUIRE_PY_SSIZE_T_CLEAN |
1330 | #undef RETURN_ERR_OCCURRED |
1331 | } |
1332 | |
1333 | static Py_ssize_t |
1334 | convertbuffer(PyObject *arg, const void **p, const char **errmsg) |
1335 | { |
1336 | PyBufferProcs *pb = Py_TYPE(arg)->tp_as_buffer; |
1337 | Py_ssize_t count; |
1338 | Py_buffer view; |
1339 | |
1340 | *errmsg = NULL; |
1341 | *p = NULL; |
1342 | if (pb != NULL && pb->bf_releasebuffer != NULL) { |
1343 | *errmsg = "read-only bytes-like object" ; |
1344 | return -1; |
1345 | } |
1346 | |
1347 | if (getbuffer(arg, &view, errmsg) < 0) |
1348 | return -1; |
1349 | count = view.len; |
1350 | *p = view.buf; |
1351 | PyBuffer_Release(&view); |
1352 | return count; |
1353 | } |
1354 | |
1355 | static int |
1356 | getbuffer(PyObject *arg, Py_buffer *view, const char **errmsg) |
1357 | { |
1358 | if (PyObject_GetBuffer(arg, view, PyBUF_SIMPLE) != 0) { |
1359 | *errmsg = "bytes-like object" ; |
1360 | return -1; |
1361 | } |
1362 | if (!PyBuffer_IsContiguous(view, 'C')) { |
1363 | PyBuffer_Release(view); |
1364 | *errmsg = "contiguous buffer" ; |
1365 | return -1; |
1366 | } |
1367 | return 0; |
1368 | } |
1369 | |
1370 | /* Support for keyword arguments donated by |
1371 | Geoff Philbrick <[email protected]> */ |
1372 | |
1373 | /* Return false (0) for error, else true. */ |
1374 | int |
1375 | PyArg_ParseTupleAndKeywords(PyObject *args, |
1376 | PyObject *keywords, |
1377 | const char *format, |
1378 | char **kwlist, ...) |
1379 | { |
1380 | int retval; |
1381 | va_list va; |
1382 | |
1383 | if ((args == NULL || !PyTuple_Check(args)) || |
1384 | (keywords != NULL && !PyDict_Check(keywords)) || |
1385 | format == NULL || |
1386 | kwlist == NULL) |
1387 | { |
1388 | PyErr_BadInternalCall(); |
1389 | return 0; |
1390 | } |
1391 | |
1392 | va_start(va, kwlist); |
1393 | retval = vgetargskeywords(args, keywords, format, kwlist, &va, 0); |
1394 | va_end(va); |
1395 | return retval; |
1396 | } |
1397 | |
1398 | PyAPI_FUNC(int) |
1399 | _PyArg_ParseTupleAndKeywords_SizeT(PyObject *args, |
1400 | PyObject *keywords, |
1401 | const char *format, |
1402 | char **kwlist, ...) |
1403 | { |
1404 | int retval; |
1405 | va_list va; |
1406 | |
1407 | if ((args == NULL || !PyTuple_Check(args)) || |
1408 | (keywords != NULL && !PyDict_Check(keywords)) || |
1409 | format == NULL || |
1410 | kwlist == NULL) |
1411 | { |
1412 | PyErr_BadInternalCall(); |
1413 | return 0; |
1414 | } |
1415 | |
1416 | va_start(va, kwlist); |
1417 | retval = vgetargskeywords(args, keywords, format, |
1418 | kwlist, &va, FLAG_SIZE_T); |
1419 | va_end(va); |
1420 | return retval; |
1421 | } |
1422 | |
1423 | |
1424 | int |
1425 | PyArg_VaParseTupleAndKeywords(PyObject *args, |
1426 | PyObject *keywords, |
1427 | const char *format, |
1428 | char **kwlist, va_list va) |
1429 | { |
1430 | int retval; |
1431 | va_list lva; |
1432 | |
1433 | if ((args == NULL || !PyTuple_Check(args)) || |
1434 | (keywords != NULL && !PyDict_Check(keywords)) || |
1435 | format == NULL || |
1436 | kwlist == NULL) |
1437 | { |
1438 | PyErr_BadInternalCall(); |
1439 | return 0; |
1440 | } |
1441 | |
1442 | va_copy(lva, va); |
1443 | |
1444 | retval = vgetargskeywords(args, keywords, format, kwlist, &lva, 0); |
1445 | va_end(lva); |
1446 | return retval; |
1447 | } |
1448 | |
1449 | PyAPI_FUNC(int) |
1450 | _PyArg_VaParseTupleAndKeywords_SizeT(PyObject *args, |
1451 | PyObject *keywords, |
1452 | const char *format, |
1453 | char **kwlist, va_list va) |
1454 | { |
1455 | int retval; |
1456 | va_list lva; |
1457 | |
1458 | if ((args == NULL || !PyTuple_Check(args)) || |
1459 | (keywords != NULL && !PyDict_Check(keywords)) || |
1460 | format == NULL || |
1461 | kwlist == NULL) |
1462 | { |
1463 | PyErr_BadInternalCall(); |
1464 | return 0; |
1465 | } |
1466 | |
1467 | va_copy(lva, va); |
1468 | |
1469 | retval = vgetargskeywords(args, keywords, format, |
1470 | kwlist, &lva, FLAG_SIZE_T); |
1471 | va_end(lva); |
1472 | return retval; |
1473 | } |
1474 | |
1475 | PyAPI_FUNC(int) |
1476 | _PyArg_ParseTupleAndKeywordsFast(PyObject *args, PyObject *keywords, |
1477 | struct _PyArg_Parser *parser, ...) |
1478 | { |
1479 | int retval; |
1480 | va_list va; |
1481 | |
1482 | va_start(va, parser); |
1483 | retval = vgetargskeywordsfast(args, keywords, parser, &va, 0); |
1484 | va_end(va); |
1485 | return retval; |
1486 | } |
1487 | |
1488 | PyAPI_FUNC(int) |
1489 | _PyArg_ParseTupleAndKeywordsFast_SizeT(PyObject *args, PyObject *keywords, |
1490 | struct _PyArg_Parser *parser, ...) |
1491 | { |
1492 | int retval; |
1493 | va_list va; |
1494 | |
1495 | va_start(va, parser); |
1496 | retval = vgetargskeywordsfast(args, keywords, parser, &va, FLAG_SIZE_T); |
1497 | va_end(va); |
1498 | return retval; |
1499 | } |
1500 | |
1501 | PyAPI_FUNC(int) |
1502 | _PyArg_ParseStackAndKeywords(PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames, |
1503 | struct _PyArg_Parser *parser, ...) |
1504 | { |
1505 | int retval; |
1506 | va_list va; |
1507 | |
1508 | va_start(va, parser); |
1509 | retval = vgetargskeywordsfast_impl(args, nargs, NULL, kwnames, parser, &va, 0); |
1510 | va_end(va); |
1511 | return retval; |
1512 | } |
1513 | |
1514 | PyAPI_FUNC(int) |
1515 | _PyArg_ParseStackAndKeywords_SizeT(PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames, |
1516 | struct _PyArg_Parser *parser, ...) |
1517 | { |
1518 | int retval; |
1519 | va_list va; |
1520 | |
1521 | va_start(va, parser); |
1522 | retval = vgetargskeywordsfast_impl(args, nargs, NULL, kwnames, parser, &va, FLAG_SIZE_T); |
1523 | va_end(va); |
1524 | return retval; |
1525 | } |
1526 | |
1527 | |
1528 | PyAPI_FUNC(int) |
1529 | _PyArg_VaParseTupleAndKeywordsFast(PyObject *args, PyObject *keywords, |
1530 | struct _PyArg_Parser *parser, va_list va) |
1531 | { |
1532 | int retval; |
1533 | va_list lva; |
1534 | |
1535 | va_copy(lva, va); |
1536 | |
1537 | retval = vgetargskeywordsfast(args, keywords, parser, &lva, 0); |
1538 | va_end(lva); |
1539 | return retval; |
1540 | } |
1541 | |
1542 | PyAPI_FUNC(int) |
1543 | _PyArg_VaParseTupleAndKeywordsFast_SizeT(PyObject *args, PyObject *keywords, |
1544 | struct _PyArg_Parser *parser, va_list va) |
1545 | { |
1546 | int retval; |
1547 | va_list lva; |
1548 | |
1549 | va_copy(lva, va); |
1550 | |
1551 | retval = vgetargskeywordsfast(args, keywords, parser, &lva, FLAG_SIZE_T); |
1552 | va_end(lva); |
1553 | return retval; |
1554 | } |
1555 | |
1556 | int |
1557 | PyArg_ValidateKeywordArguments(PyObject *kwargs) |
1558 | { |
1559 | if (!PyDict_Check(kwargs)) { |
1560 | PyErr_BadInternalCall(); |
1561 | return 0; |
1562 | } |
1563 | if (!_PyDict_HasOnlyStringKeys(kwargs)) { |
1564 | PyErr_SetString(PyExc_TypeError, |
1565 | "keywords must be strings" ); |
1566 | return 0; |
1567 | } |
1568 | return 1; |
1569 | } |
1570 | |
1571 | #define IS_END_OF_FORMAT(c) (c == '\0' || c == ';' || c == ':') |
1572 | |
1573 | static int |
1574 | vgetargskeywords(PyObject *args, PyObject *kwargs, const char *format, |
1575 | char **kwlist, va_list *p_va, int flags) |
1576 | { |
1577 | char msgbuf[512]; |
1578 | int levels[32]; |
1579 | const char *fname, *msg, *custom_msg; |
1580 | int min = INT_MAX; |
1581 | int max = INT_MAX; |
1582 | int i, pos, len; |
1583 | int skip = 0; |
1584 | Py_ssize_t nargs, nkwargs; |
1585 | PyObject *current_arg; |
1586 | freelistentry_t static_entries[STATIC_FREELIST_ENTRIES]; |
1587 | freelist_t freelist; |
1588 | |
1589 | freelist.entries = static_entries; |
1590 | freelist.first_available = 0; |
1591 | freelist.entries_malloced = 0; |
1592 | |
1593 | assert(args != NULL && PyTuple_Check(args)); |
1594 | assert(kwargs == NULL || PyDict_Check(kwargs)); |
1595 | assert(format != NULL); |
1596 | assert(kwlist != NULL); |
1597 | assert(p_va != NULL); |
1598 | |
1599 | /* grab the function name or custom error msg first (mutually exclusive) */ |
1600 | fname = strchr(format, ':'); |
1601 | if (fname) { |
1602 | fname++; |
1603 | custom_msg = NULL; |
1604 | } |
1605 | else { |
1606 | custom_msg = strchr(format,';'); |
1607 | if (custom_msg) |
1608 | custom_msg++; |
1609 | } |
1610 | |
1611 | /* scan kwlist and count the number of positional-only parameters */ |
1612 | for (pos = 0; kwlist[pos] && !*kwlist[pos]; pos++) { |
1613 | } |
1614 | /* scan kwlist and get greatest possible nbr of args */ |
1615 | for (len = pos; kwlist[len]; len++) { |
1616 | if (!*kwlist[len]) { |
1617 | PyErr_SetString(PyExc_SystemError, |
1618 | "Empty keyword parameter name" ); |
1619 | return cleanreturn(0, &freelist); |
1620 | } |
1621 | } |
1622 | |
1623 | if (len > STATIC_FREELIST_ENTRIES) { |
1624 | freelist.entries = PyMem_NEW(freelistentry_t, len); |
1625 | if (freelist.entries == NULL) { |
1626 | PyErr_NoMemory(); |
1627 | return 0; |
1628 | } |
1629 | freelist.entries_malloced = 1; |
1630 | } |
1631 | |
1632 | nargs = PyTuple_GET_SIZE(args); |
1633 | nkwargs = (kwargs == NULL) ? 0 : PyDict_GET_SIZE(kwargs); |
1634 | if (nargs + nkwargs > len) { |
1635 | /* Adding "keyword" (when nargs == 0) prevents producing wrong error |
1636 | messages in some special cases (see bpo-31229). */ |
1637 | PyErr_Format(PyExc_TypeError, |
1638 | "%.200s%s takes at most %d %sargument%s (%zd given)" , |
1639 | (fname == NULL) ? "function" : fname, |
1640 | (fname == NULL) ? "" : "()" , |
1641 | len, |
1642 | (nargs == 0) ? "keyword " : "" , |
1643 | (len == 1) ? "" : "s" , |
1644 | nargs + nkwargs); |
1645 | return cleanreturn(0, &freelist); |
1646 | } |
1647 | |
1648 | /* convert tuple args and keyword args in same loop, using kwlist to drive process */ |
1649 | for (i = 0; i < len; i++) { |
1650 | if (*format == '|') { |
1651 | if (min != INT_MAX) { |
1652 | PyErr_SetString(PyExc_SystemError, |
1653 | "Invalid format string (| specified twice)" ); |
1654 | return cleanreturn(0, &freelist); |
1655 | } |
1656 | |
1657 | min = i; |
1658 | format++; |
1659 | |
1660 | if (max != INT_MAX) { |
1661 | PyErr_SetString(PyExc_SystemError, |
1662 | "Invalid format string ($ before |)" ); |
1663 | return cleanreturn(0, &freelist); |
1664 | } |
1665 | } |
1666 | if (*format == '$') { |
1667 | if (max != INT_MAX) { |
1668 | PyErr_SetString(PyExc_SystemError, |
1669 | "Invalid format string ($ specified twice)" ); |
1670 | return cleanreturn(0, &freelist); |
1671 | } |
1672 | |
1673 | max = i; |
1674 | format++; |
1675 | |
1676 | if (max < pos) { |
1677 | PyErr_SetString(PyExc_SystemError, |
1678 | "Empty parameter name after $" ); |
1679 | return cleanreturn(0, &freelist); |
1680 | } |
1681 | if (skip) { |
1682 | /* Now we know the minimal and the maximal numbers of |
1683 | * positional arguments and can raise an exception with |
1684 | * informative message (see below). */ |
1685 | break; |
1686 | } |
1687 | if (max < nargs) { |
1688 | if (max == 0) { |
1689 | PyErr_Format(PyExc_TypeError, |
1690 | "%.200s%s takes no positional arguments" , |
1691 | (fname == NULL) ? "function" : fname, |
1692 | (fname == NULL) ? "" : "()" ); |
1693 | } |
1694 | else { |
1695 | PyErr_Format(PyExc_TypeError, |
1696 | "%.200s%s takes %s %d positional argument%s" |
1697 | " (%zd given)" , |
1698 | (fname == NULL) ? "function" : fname, |
1699 | (fname == NULL) ? "" : "()" , |
1700 | (min != INT_MAX) ? "at most" : "exactly" , |
1701 | max, |
1702 | max == 1 ? "" : "s" , |
1703 | nargs); |
1704 | } |
1705 | return cleanreturn(0, &freelist); |
1706 | } |
1707 | } |
1708 | if (IS_END_OF_FORMAT(*format)) { |
1709 | PyErr_Format(PyExc_SystemError, |
1710 | "More keyword list entries (%d) than " |
1711 | "format specifiers (%d)" , len, i); |
1712 | return cleanreturn(0, &freelist); |
1713 | } |
1714 | if (!skip) { |
1715 | if (i < nargs) { |
1716 | current_arg = PyTuple_GET_ITEM(args, i); |
1717 | } |
1718 | else if (nkwargs && i >= pos) { |
1719 | current_arg = _PyDict_GetItemStringWithError(kwargs, kwlist[i]); |
1720 | if (current_arg) { |
1721 | --nkwargs; |
1722 | } |
1723 | else if (PyErr_Occurred()) { |
1724 | return cleanreturn(0, &freelist); |
1725 | } |
1726 | } |
1727 | else { |
1728 | current_arg = NULL; |
1729 | } |
1730 | |
1731 | if (current_arg) { |
1732 | msg = convertitem(current_arg, &format, p_va, flags, |
1733 | levels, msgbuf, sizeof(msgbuf), &freelist); |
1734 | if (msg) { |
1735 | seterror(i+1, msg, levels, fname, custom_msg); |
1736 | return cleanreturn(0, &freelist); |
1737 | } |
1738 | continue; |
1739 | } |
1740 | |
1741 | if (i < min) { |
1742 | if (i < pos) { |
1743 | assert (min == INT_MAX); |
1744 | assert (max == INT_MAX); |
1745 | skip = 1; |
1746 | /* At that moment we still don't know the minimal and |
1747 | * the maximal numbers of positional arguments. Raising |
1748 | * an exception is deferred until we encounter | and $ |
1749 | * or the end of the format. */ |
1750 | } |
1751 | else { |
1752 | PyErr_Format(PyExc_TypeError, "%.200s%s missing required " |
1753 | "argument '%s' (pos %d)" , |
1754 | (fname == NULL) ? "function" : fname, |
1755 | (fname == NULL) ? "" : "()" , |
1756 | kwlist[i], i+1); |
1757 | return cleanreturn(0, &freelist); |
1758 | } |
1759 | } |
1760 | /* current code reports success when all required args |
1761 | * fulfilled and no keyword args left, with no further |
1762 | * validation. XXX Maybe skip this in debug build ? |
1763 | */ |
1764 | if (!nkwargs && !skip) { |
1765 | return cleanreturn(1, &freelist); |
1766 | } |
1767 | } |
1768 | |
1769 | /* We are into optional args, skip through to any remaining |
1770 | * keyword args */ |
1771 | msg = skipitem(&format, p_va, flags); |
1772 | if (msg) { |
1773 | PyErr_Format(PyExc_SystemError, "%s: '%s'" , msg, |
1774 | format); |
1775 | return cleanreturn(0, &freelist); |
1776 | } |
1777 | } |
1778 | |
1779 | if (skip) { |
1780 | PyErr_Format(PyExc_TypeError, |
1781 | "%.200s%s takes %s %d positional argument%s" |
1782 | " (%zd given)" , |
1783 | (fname == NULL) ? "function" : fname, |
1784 | (fname == NULL) ? "" : "()" , |
1785 | (Py_MIN(pos, min) < i) ? "at least" : "exactly" , |
1786 | Py_MIN(pos, min), |
1787 | Py_MIN(pos, min) == 1 ? "" : "s" , |
1788 | nargs); |
1789 | return cleanreturn(0, &freelist); |
1790 | } |
1791 | |
1792 | if (!IS_END_OF_FORMAT(*format) && (*format != '|') && (*format != '$')) { |
1793 | PyErr_Format(PyExc_SystemError, |
1794 | "more argument specifiers than keyword list entries " |
1795 | "(remaining format:'%s')" , format); |
1796 | return cleanreturn(0, &freelist); |
1797 | } |
1798 | |
1799 | if (nkwargs > 0) { |
1800 | PyObject *key; |
1801 | Py_ssize_t j; |
1802 | /* make sure there are no arguments given by name and position */ |
1803 | for (i = pos; i < nargs; i++) { |
1804 | current_arg = _PyDict_GetItemStringWithError(kwargs, kwlist[i]); |
1805 | if (current_arg) { |
1806 | /* arg present in tuple and in dict */ |
1807 | PyErr_Format(PyExc_TypeError, |
1808 | "argument for %.200s%s given by name ('%s') " |
1809 | "and position (%d)" , |
1810 | (fname == NULL) ? "function" : fname, |
1811 | (fname == NULL) ? "" : "()" , |
1812 | kwlist[i], i+1); |
1813 | return cleanreturn(0, &freelist); |
1814 | } |
1815 | else if (PyErr_Occurred()) { |
1816 | return cleanreturn(0, &freelist); |
1817 | } |
1818 | } |
1819 | /* make sure there are no extraneous keyword arguments */ |
1820 | j = 0; |
1821 | while (PyDict_Next(kwargs, &j, &key, NULL)) { |
1822 | int match = 0; |
1823 | if (!PyUnicode_Check(key)) { |
1824 | PyErr_SetString(PyExc_TypeError, |
1825 | "keywords must be strings" ); |
1826 | return cleanreturn(0, &freelist); |
1827 | } |
1828 | for (i = pos; i < len; i++) { |
1829 | if (_PyUnicode_EqualToASCIIString(key, kwlist[i])) { |
1830 | match = 1; |
1831 | break; |
1832 | } |
1833 | } |
1834 | if (!match) { |
1835 | PyErr_Format(PyExc_TypeError, |
1836 | "'%U' is an invalid keyword " |
1837 | "argument for %.200s%s" , |
1838 | key, |
1839 | (fname == NULL) ? "this function" : fname, |
1840 | (fname == NULL) ? "" : "()" ); |
1841 | return cleanreturn(0, &freelist); |
1842 | } |
1843 | } |
1844 | } |
1845 | |
1846 | return cleanreturn(1, &freelist); |
1847 | } |
1848 | |
1849 | |
1850 | /* List of static parsers. */ |
1851 | static struct _PyArg_Parser *static_arg_parsers = NULL; |
1852 | |
1853 | static int |
1854 | parser_init(struct _PyArg_Parser *parser) |
1855 | { |
1856 | const char * const *keywords; |
1857 | const char *format, *msg; |
1858 | int i, len, min, max, nkw; |
1859 | PyObject *kwtuple; |
1860 | |
1861 | assert(parser->keywords != NULL); |
1862 | if (parser->kwtuple != NULL) { |
1863 | return 1; |
1864 | } |
1865 | |
1866 | keywords = parser->keywords; |
1867 | /* scan keywords and count the number of positional-only parameters */ |
1868 | for (i = 0; keywords[i] && !*keywords[i]; i++) { |
1869 | } |
1870 | parser->pos = i; |
1871 | /* scan keywords and get greatest possible nbr of args */ |
1872 | for (; keywords[i]; i++) { |
1873 | if (!*keywords[i]) { |
1874 | PyErr_SetString(PyExc_SystemError, |
1875 | "Empty keyword parameter name" ); |
1876 | return 0; |
1877 | } |
1878 | } |
1879 | len = i; |
1880 | |
1881 | format = parser->format; |
1882 | if (format) { |
1883 | /* grab the function name or custom error msg first (mutually exclusive) */ |
1884 | parser->fname = strchr(parser->format, ':'); |
1885 | if (parser->fname) { |
1886 | parser->fname++; |
1887 | parser->custom_msg = NULL; |
1888 | } |
1889 | else { |
1890 | parser->custom_msg = strchr(parser->format,';'); |
1891 | if (parser->custom_msg) |
1892 | parser->custom_msg++; |
1893 | } |
1894 | |
1895 | min = max = INT_MAX; |
1896 | for (i = 0; i < len; i++) { |
1897 | if (*format == '|') { |
1898 | if (min != INT_MAX) { |
1899 | PyErr_SetString(PyExc_SystemError, |
1900 | "Invalid format string (| specified twice)" ); |
1901 | return 0; |
1902 | } |
1903 | if (max != INT_MAX) { |
1904 | PyErr_SetString(PyExc_SystemError, |
1905 | "Invalid format string ($ before |)" ); |
1906 | return 0; |
1907 | } |
1908 | min = i; |
1909 | format++; |
1910 | } |
1911 | if (*format == '$') { |
1912 | if (max != INT_MAX) { |
1913 | PyErr_SetString(PyExc_SystemError, |
1914 | "Invalid format string ($ specified twice)" ); |
1915 | return 0; |
1916 | } |
1917 | if (i < parser->pos) { |
1918 | PyErr_SetString(PyExc_SystemError, |
1919 | "Empty parameter name after $" ); |
1920 | return 0; |
1921 | } |
1922 | max = i; |
1923 | format++; |
1924 | } |
1925 | if (IS_END_OF_FORMAT(*format)) { |
1926 | PyErr_Format(PyExc_SystemError, |
1927 | "More keyword list entries (%d) than " |
1928 | "format specifiers (%d)" , len, i); |
1929 | return 0; |
1930 | } |
1931 | |
1932 | msg = skipitem(&format, NULL, 0); |
1933 | if (msg) { |
1934 | PyErr_Format(PyExc_SystemError, "%s: '%s'" , msg, |
1935 | format); |
1936 | return 0; |
1937 | } |
1938 | } |
1939 | parser->min = Py_MIN(min, len); |
1940 | parser->max = Py_MIN(max, len); |
1941 | |
1942 | if (!IS_END_OF_FORMAT(*format) && (*format != '|') && (*format != '$')) { |
1943 | PyErr_Format(PyExc_SystemError, |
1944 | "more argument specifiers than keyword list entries " |
1945 | "(remaining format:'%s')" , format); |
1946 | return 0; |
1947 | } |
1948 | } |
1949 | |
1950 | nkw = len - parser->pos; |
1951 | kwtuple = PyTuple_New(nkw); |
1952 | if (kwtuple == NULL) { |
1953 | return 0; |
1954 | } |
1955 | keywords = parser->keywords + parser->pos; |
1956 | for (i = 0; i < nkw; i++) { |
1957 | PyObject *str = PyUnicode_FromString(keywords[i]); |
1958 | if (str == NULL) { |
1959 | Py_DECREF(kwtuple); |
1960 | return 0; |
1961 | } |
1962 | PyUnicode_InternInPlace(&str); |
1963 | PyTuple_SET_ITEM(kwtuple, i, str); |
1964 | } |
1965 | parser->kwtuple = kwtuple; |
1966 | |
1967 | assert(parser->next == NULL); |
1968 | parser->next = static_arg_parsers; |
1969 | static_arg_parsers = parser; |
1970 | return 1; |
1971 | } |
1972 | |
1973 | static void |
1974 | parser_clear(struct _PyArg_Parser *parser) |
1975 | { |
1976 | Py_CLEAR(parser->kwtuple); |
1977 | } |
1978 | |
1979 | static PyObject* |
1980 | find_keyword(PyObject *kwnames, PyObject *const *kwstack, PyObject *key) |
1981 | { |
1982 | Py_ssize_t i, nkwargs; |
1983 | |
1984 | nkwargs = PyTuple_GET_SIZE(kwnames); |
1985 | for (i = 0; i < nkwargs; i++) { |
1986 | PyObject *kwname = PyTuple_GET_ITEM(kwnames, i); |
1987 | |
1988 | /* kwname == key will normally find a match in since keyword keys |
1989 | should be interned strings; if not retry below in a new loop. */ |
1990 | if (kwname == key) { |
1991 | return kwstack[i]; |
1992 | } |
1993 | } |
1994 | |
1995 | for (i = 0; i < nkwargs; i++) { |
1996 | PyObject *kwname = PyTuple_GET_ITEM(kwnames, i); |
1997 | assert(PyUnicode_Check(kwname)); |
1998 | if (_PyUnicode_EQ(kwname, key)) { |
1999 | return kwstack[i]; |
2000 | } |
2001 | } |
2002 | return NULL; |
2003 | } |
2004 | |
2005 | static int |
2006 | vgetargskeywordsfast_impl(PyObject *const *args, Py_ssize_t nargs, |
2007 | PyObject *kwargs, PyObject *kwnames, |
2008 | struct _PyArg_Parser *parser, |
2009 | va_list *p_va, int flags) |
2010 | { |
2011 | PyObject *kwtuple; |
2012 | char msgbuf[512]; |
2013 | int levels[32]; |
2014 | const char *format; |
2015 | const char *msg; |
2016 | PyObject *keyword; |
2017 | int i, pos, len; |
2018 | Py_ssize_t nkwargs; |
2019 | PyObject *current_arg; |
2020 | freelistentry_t static_entries[STATIC_FREELIST_ENTRIES]; |
2021 | freelist_t freelist; |
2022 | PyObject *const *kwstack = NULL; |
2023 | |
2024 | freelist.entries = static_entries; |
2025 | freelist.first_available = 0; |
2026 | freelist.entries_malloced = 0; |
2027 | |
2028 | assert(kwargs == NULL || PyDict_Check(kwargs)); |
2029 | assert(kwargs == NULL || kwnames == NULL); |
2030 | assert(p_va != NULL); |
2031 | |
2032 | if (parser == NULL) { |
2033 | PyErr_BadInternalCall(); |
2034 | return 0; |
2035 | } |
2036 | |
2037 | if (kwnames != NULL && !PyTuple_Check(kwnames)) { |
2038 | PyErr_BadInternalCall(); |
2039 | return 0; |
2040 | } |
2041 | |
2042 | if (!parser_init(parser)) { |
2043 | return 0; |
2044 | } |
2045 | |
2046 | kwtuple = parser->kwtuple; |
2047 | pos = parser->pos; |
2048 | len = pos + (int)PyTuple_GET_SIZE(kwtuple); |
2049 | |
2050 | if (len > STATIC_FREELIST_ENTRIES) { |
2051 | freelist.entries = PyMem_NEW(freelistentry_t, len); |
2052 | if (freelist.entries == NULL) { |
2053 | PyErr_NoMemory(); |
2054 | return 0; |
2055 | } |
2056 | freelist.entries_malloced = 1; |
2057 | } |
2058 | |
2059 | if (kwargs != NULL) { |
2060 | nkwargs = PyDict_GET_SIZE(kwargs); |
2061 | } |
2062 | else if (kwnames != NULL) { |
2063 | nkwargs = PyTuple_GET_SIZE(kwnames); |
2064 | kwstack = args + nargs; |
2065 | } |
2066 | else { |
2067 | nkwargs = 0; |
2068 | } |
2069 | if (nargs + nkwargs > len) { |
2070 | /* Adding "keyword" (when nargs == 0) prevents producing wrong error |
2071 | messages in some special cases (see bpo-31229). */ |
2072 | PyErr_Format(PyExc_TypeError, |
2073 | "%.200s%s takes at most %d %sargument%s (%zd given)" , |
2074 | (parser->fname == NULL) ? "function" : parser->fname, |
2075 | (parser->fname == NULL) ? "" : "()" , |
2076 | len, |
2077 | (nargs == 0) ? "keyword " : "" , |
2078 | (len == 1) ? "" : "s" , |
2079 | nargs + nkwargs); |
2080 | return cleanreturn(0, &freelist); |
2081 | } |
2082 | if (parser->max < nargs) { |
2083 | if (parser->max == 0) { |
2084 | PyErr_Format(PyExc_TypeError, |
2085 | "%.200s%s takes no positional arguments" , |
2086 | (parser->fname == NULL) ? "function" : parser->fname, |
2087 | (parser->fname == NULL) ? "" : "()" ); |
2088 | } |
2089 | else { |
2090 | PyErr_Format(PyExc_TypeError, |
2091 | "%.200s%s takes %s %d positional argument%s (%zd given)" , |
2092 | (parser->fname == NULL) ? "function" : parser->fname, |
2093 | (parser->fname == NULL) ? "" : "()" , |
2094 | (parser->min < parser->max) ? "at most" : "exactly" , |
2095 | parser->max, |
2096 | parser->max == 1 ? "" : "s" , |
2097 | nargs); |
2098 | } |
2099 | return cleanreturn(0, &freelist); |
2100 | } |
2101 | |
2102 | format = parser->format; |
2103 | /* convert tuple args and keyword args in same loop, using kwtuple to drive process */ |
2104 | for (i = 0; i < len; i++) { |
2105 | if (*format == '|') { |
2106 | format++; |
2107 | } |
2108 | if (*format == '$') { |
2109 | format++; |
2110 | } |
2111 | assert(!IS_END_OF_FORMAT(*format)); |
2112 | |
2113 | if (i < nargs) { |
2114 | current_arg = args[i]; |
2115 | } |
2116 | else if (nkwargs && i >= pos) { |
2117 | keyword = PyTuple_GET_ITEM(kwtuple, i - pos); |
2118 | if (kwargs != NULL) { |
2119 | current_arg = PyDict_GetItemWithError(kwargs, keyword); |
2120 | if (!current_arg && PyErr_Occurred()) { |
2121 | return cleanreturn(0, &freelist); |
2122 | } |
2123 | } |
2124 | else { |
2125 | current_arg = find_keyword(kwnames, kwstack, keyword); |
2126 | } |
2127 | if (current_arg) { |
2128 | --nkwargs; |
2129 | } |
2130 | } |
2131 | else { |
2132 | current_arg = NULL; |
2133 | } |
2134 | |
2135 | if (current_arg) { |
2136 | msg = convertitem(current_arg, &format, p_va, flags, |
2137 | levels, msgbuf, sizeof(msgbuf), &freelist); |
2138 | if (msg) { |
2139 | seterror(i+1, msg, levels, parser->fname, parser->custom_msg); |
2140 | return cleanreturn(0, &freelist); |
2141 | } |
2142 | continue; |
2143 | } |
2144 | |
2145 | if (i < parser->min) { |
2146 | /* Less arguments than required */ |
2147 | if (i < pos) { |
2148 | Py_ssize_t min = Py_MIN(pos, parser->min); |
2149 | PyErr_Format(PyExc_TypeError, |
2150 | "%.200s%s takes %s %d positional argument%s" |
2151 | " (%zd given)" , |
2152 | (parser->fname == NULL) ? "function" : parser->fname, |
2153 | (parser->fname == NULL) ? "" : "()" , |
2154 | min < parser->max ? "at least" : "exactly" , |
2155 | min, |
2156 | min == 1 ? "" : "s" , |
2157 | nargs); |
2158 | } |
2159 | else { |
2160 | keyword = PyTuple_GET_ITEM(kwtuple, i - pos); |
2161 | PyErr_Format(PyExc_TypeError, "%.200s%s missing required " |
2162 | "argument '%U' (pos %d)" , |
2163 | (parser->fname == NULL) ? "function" : parser->fname, |
2164 | (parser->fname == NULL) ? "" : "()" , |
2165 | keyword, i+1); |
2166 | } |
2167 | return cleanreturn(0, &freelist); |
2168 | } |
2169 | /* current code reports success when all required args |
2170 | * fulfilled and no keyword args left, with no further |
2171 | * validation. XXX Maybe skip this in debug build ? |
2172 | */ |
2173 | if (!nkwargs) { |
2174 | return cleanreturn(1, &freelist); |
2175 | } |
2176 | |
2177 | /* We are into optional args, skip through to any remaining |
2178 | * keyword args */ |
2179 | msg = skipitem(&format, p_va, flags); |
2180 | assert(msg == NULL); |
2181 | } |
2182 | |
2183 | assert(IS_END_OF_FORMAT(*format) || (*format == '|') || (*format == '$')); |
2184 | |
2185 | if (nkwargs > 0) { |
2186 | Py_ssize_t j; |
2187 | /* make sure there are no arguments given by name and position */ |
2188 | for (i = pos; i < nargs; i++) { |
2189 | keyword = PyTuple_GET_ITEM(kwtuple, i - pos); |
2190 | if (kwargs != NULL) { |
2191 | current_arg = PyDict_GetItemWithError(kwargs, keyword); |
2192 | if (!current_arg && PyErr_Occurred()) { |
2193 | return cleanreturn(0, &freelist); |
2194 | } |
2195 | } |
2196 | else { |
2197 | current_arg = find_keyword(kwnames, kwstack, keyword); |
2198 | } |
2199 | if (current_arg) { |
2200 | /* arg present in tuple and in dict */ |
2201 | PyErr_Format(PyExc_TypeError, |
2202 | "argument for %.200s%s given by name ('%U') " |
2203 | "and position (%d)" , |
2204 | (parser->fname == NULL) ? "function" : parser->fname, |
2205 | (parser->fname == NULL) ? "" : "()" , |
2206 | keyword, i+1); |
2207 | return cleanreturn(0, &freelist); |
2208 | } |
2209 | } |
2210 | /* make sure there are no extraneous keyword arguments */ |
2211 | j = 0; |
2212 | while (1) { |
2213 | int match; |
2214 | if (kwargs != NULL) { |
2215 | if (!PyDict_Next(kwargs, &j, &keyword, NULL)) |
2216 | break; |
2217 | } |
2218 | else { |
2219 | if (j >= PyTuple_GET_SIZE(kwnames)) |
2220 | break; |
2221 | keyword = PyTuple_GET_ITEM(kwnames, j); |
2222 | j++; |
2223 | } |
2224 | |
2225 | match = PySequence_Contains(kwtuple, keyword); |
2226 | if (match <= 0) { |
2227 | if (!match) { |
2228 | PyErr_Format(PyExc_TypeError, |
2229 | "'%S' is an invalid keyword " |
2230 | "argument for %.200s%s" , |
2231 | keyword, |
2232 | (parser->fname == NULL) ? "this function" : parser->fname, |
2233 | (parser->fname == NULL) ? "" : "()" ); |
2234 | } |
2235 | return cleanreturn(0, &freelist); |
2236 | } |
2237 | } |
2238 | } |
2239 | |
2240 | return cleanreturn(1, &freelist); |
2241 | } |
2242 | |
2243 | static int |
2244 | vgetargskeywordsfast(PyObject *args, PyObject *keywords, |
2245 | struct _PyArg_Parser *parser, va_list *p_va, int flags) |
2246 | { |
2247 | PyObject **stack; |
2248 | Py_ssize_t nargs; |
2249 | |
2250 | if (args == NULL |
2251 | || !PyTuple_Check(args) |
2252 | || (keywords != NULL && !PyDict_Check(keywords))) |
2253 | { |
2254 | PyErr_BadInternalCall(); |
2255 | return 0; |
2256 | } |
2257 | |
2258 | stack = _PyTuple_ITEMS(args); |
2259 | nargs = PyTuple_GET_SIZE(args); |
2260 | return vgetargskeywordsfast_impl(stack, nargs, keywords, NULL, |
2261 | parser, p_va, flags); |
2262 | } |
2263 | |
2264 | |
2265 | #undef _PyArg_UnpackKeywords |
2266 | |
2267 | PyObject * const * |
2268 | _PyArg_UnpackKeywords(PyObject *const *args, Py_ssize_t nargs, |
2269 | PyObject *kwargs, PyObject *kwnames, |
2270 | struct _PyArg_Parser *parser, |
2271 | int minpos, int maxpos, int minkw, |
2272 | PyObject **buf) |
2273 | { |
2274 | PyObject *kwtuple; |
2275 | PyObject *keyword; |
2276 | int i, posonly, minposonly, maxargs; |
2277 | int reqlimit = minkw ? maxpos + minkw : minpos; |
2278 | Py_ssize_t nkwargs; |
2279 | PyObject *current_arg; |
2280 | PyObject * const *kwstack = NULL; |
2281 | |
2282 | assert(kwargs == NULL || PyDict_Check(kwargs)); |
2283 | assert(kwargs == NULL || kwnames == NULL); |
2284 | |
2285 | if (parser == NULL) { |
2286 | PyErr_BadInternalCall(); |
2287 | return NULL; |
2288 | } |
2289 | |
2290 | if (kwnames != NULL && !PyTuple_Check(kwnames)) { |
2291 | PyErr_BadInternalCall(); |
2292 | return NULL; |
2293 | } |
2294 | |
2295 | if (args == NULL && nargs == 0) { |
2296 | args = buf; |
2297 | } |
2298 | |
2299 | if (!parser_init(parser)) { |
2300 | return NULL; |
2301 | } |
2302 | |
2303 | kwtuple = parser->kwtuple; |
2304 | posonly = parser->pos; |
2305 | minposonly = Py_MIN(posonly, minpos); |
2306 | maxargs = posonly + (int)PyTuple_GET_SIZE(kwtuple); |
2307 | |
2308 | if (kwargs != NULL) { |
2309 | nkwargs = PyDict_GET_SIZE(kwargs); |
2310 | } |
2311 | else if (kwnames != NULL) { |
2312 | nkwargs = PyTuple_GET_SIZE(kwnames); |
2313 | kwstack = args + nargs; |
2314 | } |
2315 | else { |
2316 | nkwargs = 0; |
2317 | } |
2318 | if (nkwargs == 0 && minkw == 0 && minpos <= nargs && nargs <= maxpos) { |
2319 | /* Fast path. */ |
2320 | return args; |
2321 | } |
2322 | if (nargs + nkwargs > maxargs) { |
2323 | /* Adding "keyword" (when nargs == 0) prevents producing wrong error |
2324 | messages in some special cases (see bpo-31229). */ |
2325 | PyErr_Format(PyExc_TypeError, |
2326 | "%.200s%s takes at most %d %sargument%s (%zd given)" , |
2327 | (parser->fname == NULL) ? "function" : parser->fname, |
2328 | (parser->fname == NULL) ? "" : "()" , |
2329 | maxargs, |
2330 | (nargs == 0) ? "keyword " : "" , |
2331 | (maxargs == 1) ? "" : "s" , |
2332 | nargs + nkwargs); |
2333 | return NULL; |
2334 | } |
2335 | if (nargs > maxpos) { |
2336 | if (maxpos == 0) { |
2337 | PyErr_Format(PyExc_TypeError, |
2338 | "%.200s%s takes no positional arguments" , |
2339 | (parser->fname == NULL) ? "function" : parser->fname, |
2340 | (parser->fname == NULL) ? "" : "()" ); |
2341 | } |
2342 | else { |
2343 | PyErr_Format(PyExc_TypeError, |
2344 | "%.200s%s takes %s %d positional argument%s (%zd given)" , |
2345 | (parser->fname == NULL) ? "function" : parser->fname, |
2346 | (parser->fname == NULL) ? "" : "()" , |
2347 | (minpos < maxpos) ? "at most" : "exactly" , |
2348 | maxpos, |
2349 | (maxpos == 1) ? "" : "s" , |
2350 | nargs); |
2351 | } |
2352 | return NULL; |
2353 | } |
2354 | if (nargs < minposonly) { |
2355 | PyErr_Format(PyExc_TypeError, |
2356 | "%.200s%s takes %s %d positional argument%s" |
2357 | " (%zd given)" , |
2358 | (parser->fname == NULL) ? "function" : parser->fname, |
2359 | (parser->fname == NULL) ? "" : "()" , |
2360 | minposonly < maxpos ? "at least" : "exactly" , |
2361 | minposonly, |
2362 | minposonly == 1 ? "" : "s" , |
2363 | nargs); |
2364 | return NULL; |
2365 | } |
2366 | |
2367 | /* copy tuple args */ |
2368 | for (i = 0; i < nargs; i++) { |
2369 | buf[i] = args[i]; |
2370 | } |
2371 | |
2372 | /* copy keyword args using kwtuple to drive process */ |
2373 | for (i = Py_MAX((int)nargs, posonly); i < maxargs; i++) { |
2374 | if (nkwargs) { |
2375 | keyword = PyTuple_GET_ITEM(kwtuple, i - posonly); |
2376 | if (kwargs != NULL) { |
2377 | current_arg = PyDict_GetItemWithError(kwargs, keyword); |
2378 | if (!current_arg && PyErr_Occurred()) { |
2379 | return NULL; |
2380 | } |
2381 | } |
2382 | else { |
2383 | current_arg = find_keyword(kwnames, kwstack, keyword); |
2384 | } |
2385 | } |
2386 | else if (i >= reqlimit) { |
2387 | break; |
2388 | } |
2389 | else { |
2390 | current_arg = NULL; |
2391 | } |
2392 | |
2393 | buf[i] = current_arg; |
2394 | |
2395 | if (current_arg) { |
2396 | --nkwargs; |
2397 | } |
2398 | else if (i < minpos || (maxpos <= i && i < reqlimit)) { |
2399 | /* Less arguments than required */ |
2400 | keyword = PyTuple_GET_ITEM(kwtuple, i - posonly); |
2401 | PyErr_Format(PyExc_TypeError, "%.200s%s missing required " |
2402 | "argument '%U' (pos %d)" , |
2403 | (parser->fname == NULL) ? "function" : parser->fname, |
2404 | (parser->fname == NULL) ? "" : "()" , |
2405 | keyword, i+1); |
2406 | return NULL; |
2407 | } |
2408 | } |
2409 | |
2410 | if (nkwargs > 0) { |
2411 | Py_ssize_t j; |
2412 | /* make sure there are no arguments given by name and position */ |
2413 | for (i = posonly; i < nargs; i++) { |
2414 | keyword = PyTuple_GET_ITEM(kwtuple, i - posonly); |
2415 | if (kwargs != NULL) { |
2416 | current_arg = PyDict_GetItemWithError(kwargs, keyword); |
2417 | if (!current_arg && PyErr_Occurred()) { |
2418 | return NULL; |
2419 | } |
2420 | } |
2421 | else { |
2422 | current_arg = find_keyword(kwnames, kwstack, keyword); |
2423 | } |
2424 | if (current_arg) { |
2425 | /* arg present in tuple and in dict */ |
2426 | PyErr_Format(PyExc_TypeError, |
2427 | "argument for %.200s%s given by name ('%U') " |
2428 | "and position (%d)" , |
2429 | (parser->fname == NULL) ? "function" : parser->fname, |
2430 | (parser->fname == NULL) ? "" : "()" , |
2431 | keyword, i+1); |
2432 | return NULL; |
2433 | } |
2434 | } |
2435 | /* make sure there are no extraneous keyword arguments */ |
2436 | j = 0; |
2437 | while (1) { |
2438 | int match; |
2439 | if (kwargs != NULL) { |
2440 | if (!PyDict_Next(kwargs, &j, &keyword, NULL)) |
2441 | break; |
2442 | } |
2443 | else { |
2444 | if (j >= PyTuple_GET_SIZE(kwnames)) |
2445 | break; |
2446 | keyword = PyTuple_GET_ITEM(kwnames, j); |
2447 | j++; |
2448 | } |
2449 | |
2450 | match = PySequence_Contains(kwtuple, keyword); |
2451 | if (match <= 0) { |
2452 | if (!match) { |
2453 | PyErr_Format(PyExc_TypeError, |
2454 | "'%S' is an invalid keyword " |
2455 | "argument for %.200s%s" , |
2456 | keyword, |
2457 | (parser->fname == NULL) ? "this function" : parser->fname, |
2458 | (parser->fname == NULL) ? "" : "()" ); |
2459 | } |
2460 | return NULL; |
2461 | } |
2462 | } |
2463 | } |
2464 | |
2465 | return buf; |
2466 | } |
2467 | |
2468 | |
2469 | static const char * |
2470 | skipitem(const char **p_format, va_list *p_va, int flags) |
2471 | { |
2472 | const char *format = *p_format; |
2473 | char c = *format++; |
2474 | |
2475 | switch (c) { |
2476 | |
2477 | /* |
2478 | * codes that take a single data pointer as an argument |
2479 | * (the type of the pointer is irrelevant) |
2480 | */ |
2481 | |
2482 | case 'b': /* byte -- very short int */ |
2483 | case 'B': /* byte as bitfield */ |
2484 | case 'h': /* short int */ |
2485 | case 'H': /* short int as bitfield */ |
2486 | case 'i': /* int */ |
2487 | case 'I': /* int sized bitfield */ |
2488 | case 'l': /* long int */ |
2489 | case 'k': /* long int sized bitfield */ |
2490 | case 'L': /* long long */ |
2491 | case 'K': /* long long sized bitfield */ |
2492 | case 'n': /* Py_ssize_t */ |
2493 | case 'f': /* float */ |
2494 | case 'd': /* double */ |
2495 | case 'D': /* complex double */ |
2496 | case 'c': /* char */ |
2497 | case 'C': /* unicode char */ |
2498 | case 'p': /* boolean predicate */ |
2499 | case 'S': /* string object */ |
2500 | case 'Y': /* string object */ |
2501 | case 'U': /* unicode string object */ |
2502 | { |
2503 | if (p_va != NULL) { |
2504 | (void) va_arg(*p_va, void *); |
2505 | } |
2506 | break; |
2507 | } |
2508 | |
2509 | /* string codes */ |
2510 | |
2511 | case 'e': /* string with encoding */ |
2512 | { |
2513 | if (p_va != NULL) { |
2514 | (void) va_arg(*p_va, const char *); |
2515 | } |
2516 | if (!(*format == 's' || *format == 't')) |
2517 | /* after 'e', only 's' and 't' is allowed */ |
2518 | goto err; |
2519 | format++; |
2520 | } |
2521 | /* fall through */ |
2522 | |
2523 | case 's': /* string */ |
2524 | case 'z': /* string or None */ |
2525 | case 'y': /* bytes */ |
2526 | case 'u': /* unicode string */ |
2527 | case 'Z': /* unicode string or None */ |
2528 | case 'w': /* buffer, read-write */ |
2529 | { |
2530 | if (p_va != NULL) { |
2531 | (void) va_arg(*p_va, char **); |
2532 | } |
2533 | if (*format == '#') { |
2534 | if (p_va != NULL) { |
2535 | if (!(flags & FLAG_SIZE_T)) { |
2536 | PyErr_SetString(PyExc_SystemError, |
2537 | "PY_SSIZE_T_CLEAN macro must be defined for '#' formats" ); |
2538 | return NULL; |
2539 | } |
2540 | (void) va_arg(*p_va, Py_ssize_t *); |
2541 | } |
2542 | format++; |
2543 | } else if ((c == 's' || c == 'z' || c == 'y' || c == 'w') |
2544 | && *format == '*') |
2545 | { |
2546 | format++; |
2547 | } |
2548 | break; |
2549 | } |
2550 | |
2551 | case 'O': /* object */ |
2552 | { |
2553 | if (*format == '!') { |
2554 | format++; |
2555 | if (p_va != NULL) { |
2556 | (void) va_arg(*p_va, PyTypeObject*); |
2557 | (void) va_arg(*p_va, PyObject **); |
2558 | } |
2559 | } |
2560 | else if (*format == '&') { |
2561 | typedef int (*converter)(PyObject *, void *); |
2562 | if (p_va != NULL) { |
2563 | (void) va_arg(*p_va, converter); |
2564 | (void) va_arg(*p_va, void *); |
2565 | } |
2566 | format++; |
2567 | } |
2568 | else { |
2569 | if (p_va != NULL) { |
2570 | (void) va_arg(*p_va, PyObject **); |
2571 | } |
2572 | } |
2573 | break; |
2574 | } |
2575 | |
2576 | case '(': /* bypass tuple, not handled at all previously */ |
2577 | { |
2578 | const char *msg; |
2579 | for (;;) { |
2580 | if (*format==')') |
2581 | break; |
2582 | if (IS_END_OF_FORMAT(*format)) |
2583 | return "Unmatched left paren in format " |
2584 | "string" ; |
2585 | msg = skipitem(&format, p_va, flags); |
2586 | if (msg) |
2587 | return msg; |
2588 | } |
2589 | format++; |
2590 | break; |
2591 | } |
2592 | |
2593 | case ')': |
2594 | return "Unmatched right paren in format string" ; |
2595 | |
2596 | default: |
2597 | err: |
2598 | return "impossible<bad format char>" ; |
2599 | |
2600 | } |
2601 | |
2602 | *p_format = format; |
2603 | return NULL; |
2604 | } |
2605 | |
2606 | |
2607 | #undef _PyArg_CheckPositional |
2608 | |
2609 | int |
2610 | _PyArg_CheckPositional(const char *name, Py_ssize_t nargs, |
2611 | Py_ssize_t min, Py_ssize_t max) |
2612 | { |
2613 | assert(min >= 0); |
2614 | assert(min <= max); |
2615 | |
2616 | if (nargs < min) { |
2617 | if (name != NULL) |
2618 | PyErr_Format( |
2619 | PyExc_TypeError, |
2620 | "%.200s expected %s%zd argument%s, got %zd" , |
2621 | name, (min == max ? "" : "at least " ), min, min == 1 ? "" : "s" , nargs); |
2622 | else |
2623 | PyErr_Format( |
2624 | PyExc_TypeError, |
2625 | "unpacked tuple should have %s%zd element%s," |
2626 | " but has %zd" , |
2627 | (min == max ? "" : "at least " ), min, min == 1 ? "" : "s" , nargs); |
2628 | return 0; |
2629 | } |
2630 | |
2631 | if (nargs == 0) { |
2632 | return 1; |
2633 | } |
2634 | |
2635 | if (nargs > max) { |
2636 | if (name != NULL) |
2637 | PyErr_Format( |
2638 | PyExc_TypeError, |
2639 | "%.200s expected %s%zd argument%s, got %zd" , |
2640 | name, (min == max ? "" : "at most " ), max, max == 1 ? "" : "s" , nargs); |
2641 | else |
2642 | PyErr_Format( |
2643 | PyExc_TypeError, |
2644 | "unpacked tuple should have %s%zd element%s," |
2645 | " but has %zd" , |
2646 | (min == max ? "" : "at most " ), max, max == 1 ? "" : "s" , nargs); |
2647 | return 0; |
2648 | } |
2649 | |
2650 | return 1; |
2651 | } |
2652 | |
2653 | static int |
2654 | unpack_stack(PyObject *const *args, Py_ssize_t nargs, const char *name, |
2655 | Py_ssize_t min, Py_ssize_t max, va_list vargs) |
2656 | { |
2657 | Py_ssize_t i; |
2658 | PyObject **o; |
2659 | |
2660 | if (!_PyArg_CheckPositional(name, nargs, min, max)) { |
2661 | return 0; |
2662 | } |
2663 | |
2664 | for (i = 0; i < nargs; i++) { |
2665 | o = va_arg(vargs, PyObject **); |
2666 | *o = args[i]; |
2667 | } |
2668 | return 1; |
2669 | } |
2670 | |
2671 | int |
2672 | PyArg_UnpackTuple(PyObject *args, const char *name, Py_ssize_t min, Py_ssize_t max, ...) |
2673 | { |
2674 | PyObject **stack; |
2675 | Py_ssize_t nargs; |
2676 | int retval; |
2677 | va_list vargs; |
2678 | |
2679 | if (!PyTuple_Check(args)) { |
2680 | PyErr_SetString(PyExc_SystemError, |
2681 | "PyArg_UnpackTuple() argument list is not a tuple" ); |
2682 | return 0; |
2683 | } |
2684 | stack = _PyTuple_ITEMS(args); |
2685 | nargs = PyTuple_GET_SIZE(args); |
2686 | |
2687 | #ifdef HAVE_STDARG_PROTOTYPES |
2688 | va_start(vargs, max); |
2689 | #else |
2690 | va_start(vargs); |
2691 | #endif |
2692 | retval = unpack_stack(stack, nargs, name, min, max, vargs); |
2693 | va_end(vargs); |
2694 | return retval; |
2695 | } |
2696 | |
2697 | int |
2698 | _PyArg_UnpackStack(PyObject *const *args, Py_ssize_t nargs, const char *name, |
2699 | Py_ssize_t min, Py_ssize_t max, ...) |
2700 | { |
2701 | int retval; |
2702 | va_list vargs; |
2703 | |
2704 | #ifdef HAVE_STDARG_PROTOTYPES |
2705 | va_start(vargs, max); |
2706 | #else |
2707 | va_start(vargs); |
2708 | #endif |
2709 | retval = unpack_stack(args, nargs, name, min, max, vargs); |
2710 | va_end(vargs); |
2711 | return retval; |
2712 | } |
2713 | |
2714 | |
2715 | #undef _PyArg_NoKeywords |
2716 | #undef _PyArg_NoKwnames |
2717 | #undef _PyArg_NoPositional |
2718 | |
2719 | /* For type constructors that don't take keyword args |
2720 | * |
2721 | * Sets a TypeError and returns 0 if the args/kwargs is |
2722 | * not empty, returns 1 otherwise |
2723 | */ |
2724 | int |
2725 | _PyArg_NoKeywords(const char *funcname, PyObject *kwargs) |
2726 | { |
2727 | if (kwargs == NULL) { |
2728 | return 1; |
2729 | } |
2730 | if (!PyDict_CheckExact(kwargs)) { |
2731 | PyErr_BadInternalCall(); |
2732 | return 0; |
2733 | } |
2734 | if (PyDict_GET_SIZE(kwargs) == 0) { |
2735 | return 1; |
2736 | } |
2737 | |
2738 | PyErr_Format(PyExc_TypeError, "%.200s() takes no keyword arguments" , |
2739 | funcname); |
2740 | return 0; |
2741 | } |
2742 | |
2743 | int |
2744 | _PyArg_NoPositional(const char *funcname, PyObject *args) |
2745 | { |
2746 | if (args == NULL) |
2747 | return 1; |
2748 | if (!PyTuple_CheckExact(args)) { |
2749 | PyErr_BadInternalCall(); |
2750 | return 0; |
2751 | } |
2752 | if (PyTuple_GET_SIZE(args) == 0) |
2753 | return 1; |
2754 | |
2755 | PyErr_Format(PyExc_TypeError, "%.200s() takes no positional arguments" , |
2756 | funcname); |
2757 | return 0; |
2758 | } |
2759 | |
2760 | int |
2761 | _PyArg_NoKwnames(const char *funcname, PyObject *kwnames) |
2762 | { |
2763 | if (kwnames == NULL) { |
2764 | return 1; |
2765 | } |
2766 | |
2767 | assert(PyTuple_CheckExact(kwnames)); |
2768 | |
2769 | if (PyTuple_GET_SIZE(kwnames) == 0) { |
2770 | return 1; |
2771 | } |
2772 | |
2773 | PyErr_Format(PyExc_TypeError, "%s() takes no keyword arguments" , funcname); |
2774 | return 0; |
2775 | } |
2776 | |
2777 | void |
2778 | _PyArg_Fini(void) |
2779 | { |
2780 | struct _PyArg_Parser *tmp, *s = static_arg_parsers; |
2781 | while (s) { |
2782 | tmp = s->next; |
2783 | s->next = NULL; |
2784 | parser_clear(s); |
2785 | s = tmp; |
2786 | } |
2787 | static_arg_parsers = NULL; |
2788 | } |
2789 | |
2790 | #ifdef __cplusplus |
2791 | }; |
2792 | #endif |
2793 | |