Changeset 391 for python/trunk/Python/modsupport.c
- Timestamp:
- Mar 19, 2014, 11:31:01 PM (11 years ago)
- Location:
- python/trunk
- Files:
-
- 2 edited
Legend:
- Unmodified
- Added
- Removed
-
python/trunk
-
Property svn:mergeinfo
set to
/python/vendor/Python-2.7.6 merged eligible /python/vendor/current merged eligible
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Property svn:mergeinfo
set to
-
python/trunk/Python/modsupport.c
r2 r391 31 31 PyObject * 32 32 Py_InitModule4(const char *name, PyMethodDef *methods, const char *doc, 33 PyObject *passthrough, int module_api_version) 34 { 35 PyObject *m, *d, *v, *n; 36 PyMethodDef *ml; 37 if (!Py_IsInitialized()) 38 Py_FatalError("Interpreter not initialized (version mismatch?)"); 39 if (module_api_version != PYTHON_API_VERSION) { 40 char message[512]; 41 PyOS_snprintf(message, sizeof(message), 42 api_version_warning, name, 43 PYTHON_API_VERSION, name, 44 module_api_version); 45 if (PyErr_Warn(PyExc_RuntimeWarning, message)) 46 return NULL; 47 } 48 /* Make sure name is fully qualified. 49 50 This is a bit of a hack: when the shared library is loaded, 51 the module name is "package.module", but the module calls 52 Py_InitModule*() with just "module" for the name. The shared 53 library loader squirrels away the true name of the module in 54 _Py_PackageContext, and Py_InitModule*() will substitute this 55 (if the name actually matches). 56 */ 57 if (_Py_PackageContext != NULL) { 58 char *p = strrchr(_Py_PackageContext, '.'); 59 if (p != NULL && strcmp(name, p+1) == 0) { 60 name = _Py_PackageContext; 61 _Py_PackageContext = NULL; 62 } 63 } 64 if ((m = PyImport_AddModule(name)) == NULL) 65 return NULL; 66 d = PyModule_GetDict(m); 67 if (methods != NULL) { 68 n = PyString_FromString(name); 69 if (n == NULL) 70 return NULL; 71 for (ml = methods; ml->ml_name != NULL; ml++) { 72 if ((ml->ml_flags & METH_CLASS) || 73 (ml->ml_flags & METH_STATIC)) { 74 PyErr_SetString(PyExc_ValueError, 75 "module functions cannot set" 76 " METH_CLASS or METH_STATIC"); 77 Py_DECREF(n); 78 return NULL; 79 } 80 v = PyCFunction_NewEx(ml, passthrough, n); 81 if (v == NULL) { 82 Py_DECREF(n); 83 return NULL; 84 } 85 if (PyDict_SetItemString(d, ml->ml_name, v) != 0) { 86 Py_DECREF(v); 87 Py_DECREF(n); 88 return NULL; 89 } 90 Py_DECREF(v); 91 } 92 Py_DECREF(n); 93 } 94 if (doc != NULL) { 95 v = PyString_FromString(doc); 96 if (v == NULL || PyDict_SetItemString(d, "__doc__", v) != 0) { 97 Py_XDECREF(v); 98 return NULL; 99 } 100 Py_DECREF(v); 101 } 102 return m; 33 PyObject *passthrough, int module_api_version) 34 { 35 PyObject *m, *d, *v, *n; 36 PyMethodDef *ml; 37 PyInterpreterState *interp = PyThreadState_Get()->interp; 38 if (interp->modules == NULL) 39 Py_FatalError("Python import machinery not initialized"); 40 if (module_api_version != PYTHON_API_VERSION) { 41 char message[512]; 42 PyOS_snprintf(message, sizeof(message), 43 api_version_warning, name, 44 PYTHON_API_VERSION, name, 45 module_api_version); 46 if (PyErr_Warn(PyExc_RuntimeWarning, message)) 47 return NULL; 48 } 49 /* Make sure name is fully qualified. 50 51 This is a bit of a hack: when the shared library is loaded, 52 the module name is "package.module", but the module calls 53 Py_InitModule*() with just "module" for the name. The shared 54 library loader squirrels away the true name of the module in 55 _Py_PackageContext, and Py_InitModule*() will substitute this 56 (if the name actually matches). 57 */ 58 if (_Py_PackageContext != NULL) { 59 char *p = strrchr(_Py_PackageContext, '.'); 60 if (p != NULL && strcmp(name, p+1) == 0) { 61 name = _Py_PackageContext; 62 _Py_PackageContext = NULL; 63 } 64 } 65 if ((m = PyImport_AddModule(name)) == NULL) 66 return NULL; 67 d = PyModule_GetDict(m); 68 if (methods != NULL) { 69 n = PyString_FromString(name); 70 if (n == NULL) 71 return NULL; 72 for (ml = methods; ml->ml_name != NULL; ml++) { 73 if ((ml->ml_flags & METH_CLASS) || 74 (ml->ml_flags & METH_STATIC)) { 75 PyErr_SetString(PyExc_ValueError, 76 "module functions cannot set" 77 " METH_CLASS or METH_STATIC"); 78 Py_DECREF(n); 79 return NULL; 80 } 81 v = PyCFunction_NewEx(ml, passthrough, n); 82 if (v == NULL) { 83 Py_DECREF(n); 84 return NULL; 85 } 86 if (PyDict_SetItemString(d, ml->ml_name, v) != 0) { 87 Py_DECREF(v); 88 Py_DECREF(n); 89 return NULL; 90 } 91 Py_DECREF(v); 92 } 93 Py_DECREF(n); 94 } 95 if (doc != NULL) { 96 v = PyString_FromString(doc); 97 if (v == NULL || PyDict_SetItemString(d, "__doc__", v) != 0) { 98 Py_XDECREF(v); 99 return NULL; 100 } 101 Py_DECREF(v); 102 } 103 return m; 103 104 } 104 105 … … 109 110 countformat(const char *format, int endchar) 110 111 { 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 112 int count = 0; 113 int level = 0; 114 while (level > 0 || *format != endchar) { 115 switch (*format) { 116 case '\0': 117 /* Premature end */ 118 PyErr_SetString(PyExc_SystemError, 119 "unmatched paren in format"); 120 return -1; 121 case '(': 122 case '[': 123 case '{': 124 if (level == 0) 125 count++; 126 level++; 127 break; 128 case ')': 129 case ']': 130 case '}': 131 level--; 132 break; 133 case '#': 134 case '&': 135 case ',': 136 case ':': 137 case ' ': 138 case '\t': 139 break; 140 default: 141 if (level == 0) 142 count++; 143 } 144 format++; 145 } 146 return count; 146 147 } 147 148 … … 159 160 do_mkdict(const char **p_format, va_list *p_va, int endchar, int n, int flags) 160 161 { 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 162 PyObject *d; 163 int i; 164 int itemfailed = 0; 165 if (n < 0) 166 return NULL; 167 if ((d = PyDict_New()) == NULL) 168 return NULL; 169 /* Note that we can't bail immediately on error as this will leak 170 refcounts on any 'N' arguments. */ 171 for (i = 0; i < n; i+= 2) { 172 PyObject *k, *v; 173 int err; 174 k = do_mkvalue(p_format, p_va, flags); 175 if (k == NULL) { 176 itemfailed = 1; 177 Py_INCREF(Py_None); 178 k = Py_None; 179 } 180 v = do_mkvalue(p_format, p_va, flags); 181 if (v == NULL) { 182 itemfailed = 1; 183 Py_INCREF(Py_None); 184 v = Py_None; 185 } 186 err = PyDict_SetItem(d, k, v); 187 Py_DECREF(k); 188 Py_DECREF(v); 189 if (err < 0 || itemfailed) { 190 Py_DECREF(d); 191 return NULL; 192 } 193 } 194 if (d != NULL && **p_format != endchar) { 195 Py_DECREF(d); 196 d = NULL; 197 PyErr_SetString(PyExc_SystemError, 198 "Unmatched paren in format"); 199 } 200 else if (endchar) 201 ++*p_format; 202 return d; 202 203 } 203 204 … … 205 206 do_mklist(const char **p_format, va_list *p_va, int endchar, int n, int flags) 206 207 { 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 208 PyObject *v; 209 int i; 210 int itemfailed = 0; 211 if (n < 0) 212 return NULL; 213 v = PyList_New(n); 214 if (v == NULL) 215 return NULL; 216 /* Note that we can't bail immediately on error as this will leak 217 refcounts on any 'N' arguments. */ 218 for (i = 0; i < n; i++) { 219 PyObject *w = do_mkvalue(p_format, p_va, flags); 220 if (w == NULL) { 221 itemfailed = 1; 222 Py_INCREF(Py_None); 223 w = Py_None; 224 } 225 PyList_SET_ITEM(v, i, w); 226 } 227 228 if (itemfailed) { 229 /* do_mkvalue() should have already set an error */ 230 Py_DECREF(v); 231 return NULL; 232 } 233 if (**p_format != endchar) { 234 Py_DECREF(v); 235 PyErr_SetString(PyExc_SystemError, 236 "Unmatched paren in format"); 237 return NULL; 238 } 239 if (endchar) 240 ++*p_format; 241 return v; 241 242 } 242 243 … … 245 246 _ustrlen(Py_UNICODE *u) 246 247 { 247 248 249 while (*v != 0) { i++; v++; } 250 248 int i = 0; 249 Py_UNICODE *v = u; 250 while (*v != 0) { i++; v++; } 251 return i; 251 252 } 252 253 #endif … … 255 256 do_mktuple(const char **p_format, va_list *p_va, int endchar, int n, int flags) 256 257 { 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 258 PyObject *v; 259 int i; 260 int itemfailed = 0; 261 if (n < 0) 262 return NULL; 263 if ((v = PyTuple_New(n)) == NULL) 264 return NULL; 265 /* Note that we can't bail immediately on error as this will leak 266 refcounts on any 'N' arguments. */ 267 for (i = 0; i < n; i++) { 268 PyObject *w = do_mkvalue(p_format, p_va, flags); 269 if (w == NULL) { 270 itemfailed = 1; 271 Py_INCREF(Py_None); 272 w = Py_None; 273 } 274 PyTuple_SET_ITEM(v, i, w); 275 } 276 if (itemfailed) { 277 /* do_mkvalue() should have already set an error */ 278 Py_DECREF(v); 279 return NULL; 280 } 281 if (**p_format != endchar) { 282 Py_DECREF(v); 283 PyErr_SetString(PyExc_SystemError, 284 "Unmatched paren in format"); 285 return NULL; 286 } 287 if (endchar) 288 ++*p_format; 289 return v; 289 290 } 290 291 … … 292 293 do_mkvalue(const char **p_format, va_list *p_va, int flags) 293 294 { 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 295 for (;;) { 296 switch (*(*p_format)++) { 297 case '(': 298 return do_mktuple(p_format, p_va, ')', 299 countformat(*p_format, ')'), flags); 300 301 case '[': 302 return do_mklist(p_format, p_va, ']', 303 countformat(*p_format, ']'), flags); 304 305 case '{': 306 return do_mkdict(p_format, p_va, '}', 307 countformat(*p_format, '}'), flags); 308 309 case 'b': 310 case 'B': 311 case 'h': 312 case 'i': 313 return PyInt_FromLong((long)va_arg(*p_va, int)); 314 315 case 'H': 316 return PyInt_FromLong((long)va_arg(*p_va, unsigned int)); 317 318 case 'I': 319 { 320 unsigned int n; 321 n = va_arg(*p_va, unsigned int); 322 if (n > (unsigned long)PyInt_GetMax()) 323 return PyLong_FromUnsignedLong((unsigned long)n); 324 else 325 return PyInt_FromLong(n); 326 } 327 328 case 'n': 328 329 #if SIZEOF_SIZE_T!=SIZEOF_LONG 329 330 return PyInt_FromSsize_t(va_arg(*p_va, Py_ssize_t)); 330 331 #endif 331 332 333 334 335 336 337 338 339 340 341 342 343 332 /* Fall through from 'n' to 'l' if Py_ssize_t is long */ 333 case 'l': 334 return PyInt_FromLong(va_arg(*p_va, long)); 335 336 case 'k': 337 { 338 unsigned long n; 339 n = va_arg(*p_va, unsigned long); 340 if (n > (unsigned long)PyInt_GetMax()) 341 return PyLong_FromUnsignedLong(n); 342 else 343 return PyInt_FromLong(n); 344 } 344 345 345 346 #ifdef HAVE_LONG_LONG 346 347 348 349 350 347 case 'L': 348 return PyLong_FromLongLong((PY_LONG_LONG)va_arg(*p_va, PY_LONG_LONG)); 349 350 case 'K': 351 return PyLong_FromUnsignedLongLong((PY_LONG_LONG)va_arg(*p_va, unsigned PY_LONG_LONG)); 351 352 #endif 352 353 #ifdef Py_USING_UNICODE 353 354 355 356 357 Py_ssize_t n; 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 354 case 'u': 355 { 356 PyObject *v; 357 Py_UNICODE *u = va_arg(*p_va, Py_UNICODE *); 358 Py_ssize_t n; 359 if (**p_format == '#') { 360 ++*p_format; 361 if (flags & FLAG_SIZE_T) 362 n = va_arg(*p_va, Py_ssize_t); 363 else 364 n = va_arg(*p_va, int); 365 } 366 else 367 n = -1; 368 if (u == NULL) { 369 v = Py_None; 370 Py_INCREF(v); 371 } 372 else { 373 if (n < 0) 374 n = _ustrlen(u); 375 v = PyUnicode_FromUnicode(u, n); 376 } 377 return v; 378 } 378 379 #endif 379 380 381 382 380 case 'f': 381 case 'd': 382 return PyFloat_FromDouble( 383 (double)va_arg(*p_va, va_double)); 383 384 384 385 #ifndef WITHOUT_COMPLEX 385 386 387 386 case 'D': 387 return PyComplex_FromCComplex( 388 *((Py_complex *)va_arg(*p_va, Py_complex *))); 388 389 #endif /* WITHOUT_COMPLEX */ 389 390 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 391 case 'c': 392 { 393 char p[1]; 394 p[0] = (char)va_arg(*p_va, int); 395 return PyString_FromStringAndSize(p, 1); 396 } 397 398 case 's': 399 case 'z': 400 { 401 PyObject *v; 402 char *str = va_arg(*p_va, char *); 403 Py_ssize_t n; 404 if (**p_format == '#') { 405 ++*p_format; 406 if (flags & FLAG_SIZE_T) 407 n = va_arg(*p_va, Py_ssize_t); 408 else 409 n = va_arg(*p_va, int); 410 } 411 else 412 n = -1; 413 if (str == NULL) { 414 v = Py_None; 415 Py_INCREF(v); 416 } 417 else { 418 if (n < 0) { 419 size_t m = strlen(str); 420 if (m > PY_SSIZE_T_MAX) { 421 PyErr_SetString(PyExc_OverflowError, 422 "string too long for Python string"); 423 return NULL; 424 } 425 n = (Py_ssize_t)m; 426 } 427 v = PyString_FromStringAndSize(str, n); 428 } 429 return v; 430 } 431 432 case 'N': 433 case 'S': 434 case 'O': 435 if (**p_format == '&') { 436 typedef PyObject *(*converter)(void *); 437 converter func = va_arg(*p_va, converter); 438 void *arg = va_arg(*p_va, void *); 439 ++*p_format; 440 return (*func)(arg); 441 } 442 else { 443 PyObject *v; 444 v = va_arg(*p_va, PyObject *); 445 if (v != NULL) { 446 if (*(*p_format - 1) != 'N') 447 Py_INCREF(v); 448 } 449 else if (!PyErr_Occurred()) 450 /* If a NULL was passed 451 * because a call that should 452 * have constructed a value 453 * failed, that's OK, and we 454 * pass the error on; but if 455 * no error occurred it's not 456 * clear that the caller knew 457 * what she was doing. */ 458 PyErr_SetString(PyExc_SystemError, 459 "NULL object passed to Py_BuildValue"); 460 return v; 461 } 462 463 case ':': 464 case ',': 465 case ' ': 466 case '\t': 467 break; 468 469 default: 470 PyErr_SetString(PyExc_SystemError, 471 "bad format char passed to Py_BuildValue"); 472 return NULL; 473 474 } 475 } 475 476 } 476 477 … … 479 480 Py_BuildValue(const char *format, ...) 480 481 { 481 482 483 484 485 486 482 va_list va; 483 PyObject* retval; 484 va_start(va, format); 485 retval = va_build_value(format, va, 0); 486 va_end(va); 487 return retval; 487 488 } 488 489 … … 490 491 _Py_BuildValue_SizeT(const char *format, ...) 491 492 { 492 493 494 495 496 497 493 va_list va; 494 PyObject* retval; 495 va_start(va, format); 496 retval = va_build_value(format, va, FLAG_SIZE_T); 497 va_end(va); 498 return retval; 498 499 } 499 500 … … 501 502 Py_VaBuildValue(const char *format, va_list va) 502 503 { 503 504 return va_build_value(format, va, 0); 504 505 } 505 506 … … 507 508 _Py_VaBuildValue_SizeT(const char *format, va_list va) 508 509 { 509 510 return va_build_value(format, va, FLAG_SIZE_T); 510 511 } 511 512 … … 513 514 va_build_value(const char *format, va_list va, int flags) 514 515 { 515 516 517 516 const char *f = format; 517 int n = countformat(f, '\0'); 518 va_list lva; 518 519 519 520 #ifdef VA_LIST_IS_ARRAY 520 521 memcpy(lva, va, sizeof(va_list)); 521 522 #else 522 523 #ifdef __va_copy 523 524 __va_copy(lva, va); 524 525 #else 525 526 lva = va; 526 527 #endif 527 528 #endif 528 529 529 530 531 532 533 534 535 536 537 530 if (n < 0) 531 return NULL; 532 if (n == 0) { 533 Py_INCREF(Py_None); 534 return Py_None; 535 } 536 if (n == 1) 537 return do_mkvalue(&f, &lva, flags); 538 return do_mktuple(&f, &lva, '\0', n, flags); 538 539 } 539 540 … … 542 543 PyEval_CallFunction(PyObject *obj, const char *format, ...) 543 544 { 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 545 va_list vargs; 546 PyObject *args; 547 PyObject *res; 548 549 va_start(vargs, format); 550 551 args = Py_VaBuildValue(format, vargs); 552 va_end(vargs); 553 554 if (args == NULL) 555 return NULL; 556 557 res = PyEval_CallObject(obj, args); 558 Py_DECREF(args); 559 560 return res; 560 561 } 561 562 … … 564 565 PyEval_CallMethod(PyObject *obj, const char *methodname, const char *format, ...) 565 566 { 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 567 va_list vargs; 568 PyObject *meth; 569 PyObject *args; 570 PyObject *res; 571 572 meth = PyObject_GetAttrString(obj, methodname); 573 if (meth == NULL) 574 return NULL; 575 576 va_start(vargs, format); 577 578 args = Py_VaBuildValue(format, vargs); 579 va_end(vargs); 580 581 if (args == NULL) { 582 Py_DECREF(meth); 583 return NULL; 584 } 585 586 res = PyEval_CallObject(meth, args); 587 Py_DECREF(meth); 588 Py_DECREF(args); 589 590 return res; 590 591 } 591 592 … … 593 594 PyModule_AddObject(PyObject *m, const char *name, PyObject *o) 594 595 { 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 int 596 PyObject *dict; 597 if (!PyModule_Check(m)) { 598 PyErr_SetString(PyExc_TypeError, 599 "PyModule_AddObject() needs module as first arg"); 600 return -1; 601 } 602 if (!o) { 603 if (!PyErr_Occurred()) 604 PyErr_SetString(PyExc_TypeError, 605 "PyModule_AddObject() needs non-NULL value"); 606 return -1; 607 } 608 609 dict = PyModule_GetDict(m); 610 if (dict == NULL) { 611 /* Internal error -- modules must have a dict! */ 612 PyErr_Format(PyExc_SystemError, "module '%s' has no __dict__", 613 PyModule_GetName(m)); 614 return -1; 615 } 616 if (PyDict_SetItemString(dict, name, o)) 617 return -1; 618 Py_DECREF(o); 619 return 0; 620 } 621 622 int 622 623 PyModule_AddIntConstant(PyObject *m, const char *name, long value) 623 624 { 624 625 626 627 628 629 630 631 } 632 633 int 625 PyObject *o = PyInt_FromLong(value); 626 if (!o) 627 return -1; 628 if (PyModule_AddObject(m, name, o) == 0) 629 return 0; 630 Py_DECREF(o); 631 return -1; 632 } 633 634 int 634 635 PyModule_AddStringConstant(PyObject *m, const char *name, const char *value) 635 636 { 636 637 638 639 640 641 642 643 } 637 PyObject *o = PyString_FromString(value); 638 if (!o) 639 return -1; 640 if (PyModule_AddObject(m, name, o) == 0) 641 return 0; 642 Py_DECREF(o); 643 return -1; 644 }
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