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GeezerVison is showing github.com — cpython/Modules/arraymodule.c at 3.12 · python/cpython Expand file tree/ Copy patharraymodule.cMore file actions 3143 lines (2772 loc) · 88.2 KB / Copy patharraymodule.cFile metadata and controls3143 lines (2772 loc) · 88.2 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 /* Array object implementation */ /* An array is a uniform list -- all items have the same type. The item type is restricted to simple C types like int or float */ #ifndef Py_BUILD_CORE_BUILTIN # define Py_BUILD_CORE_MODULE 1 #endif #define PY_SSIZE_T_CLEAN #include "Python.h" #include "pycore_moduleobject.h" // _PyModule_GetState() #include "pycore_bytesobject.h" // _PyBytes_Repeat #include "structmember.h" // PyMemberDef #include <stddef.h> // offsetof() /*[clinic input] module array [clinic start generated code]*/ /*[clinic end generated code: output=da39a3ee5e6b4b0d input=7d1b8d7f5958fd83]*/ struct arrayobject; /* Forward */ static struct PyModuleDef arraymodule; /* All possible arraydescr values are defined in the vector "descriptors" * below. That's defined later because the appropriate get and set * functions aren't visible yet. */ struct arraydescr { char typecode; int itemsize; PyObject * (*getitem)(struct arrayobject *, Py_ssize_t); int (*setitem)(struct arrayobject *, Py_ssize_t, PyObject *); int (*compareitems)(const void *, const void *, Py_ssize_t); const char *formats; int is_integer_type; int is_signed; }; typedef struct arrayobject { PyObject_VAR_HEAD char *ob_item; Py_ssize_t allocated; const struct arraydescr *ob_descr; PyObject *weakreflist; /* List of weak references */ Py_ssize_t ob_exports; /* Number of exported buffers */ } arrayobject; typedef struct { PyObject_HEAD Py_ssize_t index; arrayobject *ao; PyObject* (*getitem)(struct arrayobject *, Py_ssize_t); } arrayiterobject; typedef struct { PyTypeObject *ArrayType; PyTypeObject *ArrayIterType; PyObject *array_reconstructor; PyObject *str_read; PyObject *str_write; PyObject *str___dict__; PyObject *str_iter; } array_state; static array_state * get_array_state(PyObject *module) { return (array_state *)_PyModule_GetState(module); } #define find_array_state_by_type(tp) \ (get_array_state(PyType_GetModuleByDef(tp, &arraymodule))) #define get_array_state_by_class(cls) \ (get_array_state(PyType_GetModule(cls))) enum machine_format_code { UNKNOWN_FORMAT = -1, /* UNKNOWN_FORMAT is used to indicate that the machine format for an * array type code cannot be interpreted. When this occurs, a list of * Python objects is used to represent the content of the array * instead of using the memory content of the array directly. In that * case, the array_reconstructor mechanism is bypassed completely, and * the standard array constructor is used instead. * * This is will most likely occur when the machine doesn't use IEEE * floating-point numbers. */ UNSIGNED_INT8 = 0, SIGNED_INT8 = 1, UNSIGNED_INT16_LE = 2, UNSIGNED_INT16_BE = 3, SIGNED_INT16_LE = 4, SIGNED_INT16_BE = 5, UNSIGNED_INT32_LE = 6, UNSIGNED_INT32_BE = 7, SIGNED_INT32_LE = 8, SIGNED_INT32_BE = 9, UNSIGNED_INT64_LE = 10, UNSIGNED_INT64_BE = 11, SIGNED_INT64_LE = 12, SIGNED_INT64_BE = 13, IEEE_754_FLOAT_LE = 14, IEEE_754_FLOAT_BE = 15, IEEE_754_DOUBLE_LE = 16, IEEE_754_DOUBLE_BE = 17, UTF16_LE = 18, UTF16_BE = 19, UTF32_LE = 20, UTF32_BE = 21 }; #define MACHINE_FORMAT_CODE_MIN 0 #define MACHINE_FORMAT_CODE_MAX 21 /* * Must come after arrayobject, arrayiterobject, * and enum machine_code_type definitions. */ #include "clinic/arraymodule.c.h" #define array_Check(op, state) PyObject_TypeCheck(op, state->ArrayType) static int array_resize(arrayobject *self, Py_ssize_t newsize) { char *items; size_t _new_size; if (self->ob_exports > 0 && newsize != Py_SIZE(self)) { PyErr_SetString(PyExc_BufferError, "cannot resize an array that is exporting buffers"); return -1; } /* Bypass realloc() when a previous overallocation is large enough to accommodate the newsize. If the newsize is 16 smaller than the current size, then proceed with the realloc() to shrink the array. */ if (self->allocated >= newsize && Py_SIZE(self) < newsize + 16 && self->ob_item != NULL) { Py_SET_SIZE(self, newsize); return 0; } if (newsize == 0) { PyMem_Free(self->ob_item); self->ob_item = NULL; Py_SET_SIZE(self, 0); self->allocated = 0; return 0; } /* This over-allocates proportional to the array size, making room * for additional growth. The over-allocation is mild, but is * enough to give linear-time amortized behavior over a long * sequence of appends() in the presence of a poorly-performing * system realloc(). * The growth pattern is: 0, 4, 8, 16, 25, 34, 46, 56, 67, 79, ... * Note, the pattern starts out the same as for lists but then * grows at a smaller rate so that larger arrays only overallocate * by about 1/16th -- this is done because arrays are presumed to be more * memory critical. */ _new_size = (newsize >> 4) + (Py_SIZE(self) < 8 ? 3 : 7) + newsize; items = self->ob_item; /* XXX The following multiplication and division does not optimize away like it does for lists since the size is not known at compile time */ if (_new_size <= ((~(size_t)0) / self->ob_descr->itemsize)) PyMem_RESIZE(items, char, (_new_size * self->ob_descr->itemsize)); else items = NULL; if (items == NULL) { PyErr_NoMemory(); return -1; } self->ob_item = items; Py_SET_SIZE(self, newsize); self->allocated = _new_size; return 0; } /**************************************************************************** Get and Set functions for each type. A Get function takes an arrayobject* and an integer index, returning the array value at that index wrapped in an appropriate PyObject*. A Set function takes an arrayobject, integer index, and PyObject*; sets the array value at that index to the raw C data extracted from the PyObject*, and returns 0 if successful, else nonzero on failure (PyObject* not of an appropriate type or value). Note that the basic Get and Set functions do NOT check that the index is in bounds; that's the responsibility of the caller. ****************************************************************************/ static PyObject * b_getitem(arrayobject *ap, Py_ssize_t i) { long x = ((signed char *)ap->ob_item)[i]; return PyLong_FromLong(x); } static int b_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v) { short x; /* PyArg_Parse's 'b' formatter is for an unsigned char, therefore must use the next size up that is signed ('h') and manually do the overflow checking */ if (!PyArg_Parse(v, "h;array item must be integer", &x)) return -1; else if (x < -128) { PyErr_SetString(PyExc_OverflowError, "signed char is less than minimum"); return -1; } else if (x > 127) { PyErr_SetString(PyExc_OverflowError, "signed char is greater than maximum"); return -1; } if (i >= 0) ((char *)ap->ob_item)[i] = (char)x; return 0; } static PyObject * BB_getitem(arrayobject *ap, Py_ssize_t i) { long x = ((unsigned char *)ap->ob_item)[i]; return PyLong_FromLong(x); } static int BB_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v) { unsigned char x; /* 'B' == unsigned char, maps to PyArg_Parse's 'b' formatter */ if (!PyArg_Parse(v, "b;array item must be integer", &x)) return -1; if (i >= 0) ((unsigned char *)ap->ob_item)[i] = x; return 0; } static PyObject * u_getitem(arrayobject *ap, Py_ssize_t i) { return PyUnicode_FromOrdinal(((wchar_t *) ap->ob_item)[i]); } static int u_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v) { PyObject *u; if (!PyArg_Parse(v, "U;array item must be unicode character", &u)) { return -1; } Py_ssize_t len = PyUnicode_AsWideChar(u, NULL, 0); if (len != 2) { PyErr_SetString(PyExc_TypeError, "array item must be unicode character"); return -1; } wchar_t w; len = PyUnicode_AsWideChar(u, &w, 1); assert(len == 1); if (i >= 0) { ((wchar_t *)ap->ob_item)[i] = w; } return 0; } static PyObject * h_getitem(arrayobject *ap, Py_ssize_t i) { return PyLong_FromLong((long) ((short *)ap->ob_item)[i]); } static int h_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v) { short x; /* 'h' == signed short, maps to PyArg_Parse's 'h' formatter */ if (!PyArg_Parse(v, "h;array item must be integer", &x)) return -1; if (i >= 0) ((short *)ap->ob_item)[i] = x; return 0; } static PyObject * HH_getitem(arrayobject *ap, Py_ssize_t i) { return PyLong_FromLong((long) ((unsigned short *)ap->ob_item)[i]); } static int HH_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v) { int x; /* PyArg_Parse's 'h' formatter is for a signed short, therefore must use the next size up and manually do the overflow checking */ if (!PyArg_Parse(v, "i;array item must be integer", &x)) return -1; else if (x < 0) { PyErr_SetString(PyExc_OverflowError, "unsigned short is less than minimum"); return -1; } else if (x > USHRT_MAX) { PyErr_SetString(PyExc_OverflowError, "unsigned short is greater than maximum"); return -1; } if (i >= 0) ((short *)ap->ob_item)[i] = (short)x; return 0; } static PyObject * i_getitem(arrayobject *ap, Py_ssize_t i) { return PyLong_FromLong((long) ((int *)ap->ob_item)[i]); } static int i_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v) { int x; /* 'i' == signed int, maps to PyArg_Parse's 'i' formatter */ if (!PyArg_Parse(v, "i;array item must be integer", &x)) return -1; if (i >= 0) ((int *)ap->ob_item)[i] = x; return 0; } static PyObject * II_getitem(arrayobject *ap, Py_ssize_t i) { return PyLong_FromUnsignedLong( (unsigned long) ((unsigned int *)ap->ob_item)[i]); } static int II_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v) { unsigned long x; int do_decref = 0; /* if nb_int was called */ if (!PyLong_Check(v)) { v = _PyNumber_Index(v); if (NULL == v) { return -1; } do_decref = 1; } x = PyLong_AsUnsignedLong(v); if (x == (unsigned long)-1 && PyErr_Occurred()) { if (do_decref) { Py_DECREF(v); } return -1; } if (x > UINT_MAX) { PyErr_SetString(PyExc_OverflowError, "unsigned int is greater than maximum"); if (do_decref) { Py_DECREF(v); } return -1; } if (i >= 0) ((unsigned int *)ap->ob_item)[i] = (unsigned int)x; if (do_decref) { Py_DECREF(v); } return 0; } static PyObject * l_getitem(arrayobject *ap, Py_ssize_t i) { return PyLong_FromLong(((long *)ap->ob_item)[i]); } static int l_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v) { long x; if (!PyArg_Parse(v, "l;array item must be integer", &x)) return -1; if (i >= 0) ((long *)ap->ob_item)[i] = x; return 0; } static PyObject * LL_getitem(arrayobject *ap, Py_ssize_t i) { return PyLong_FromUnsignedLong(((unsigned long *)ap->ob_item)[i]); } static int LL_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v) { unsigned long x; int do_decref = 0; /* if nb_int was called */ if (!PyLong_Check(v)) { v = _PyNumber_Index(v); if (NULL == v) { return -1; } do_decref = 1; } x = PyLong_AsUnsignedLong(v); if (x == (unsigned long)-1 && PyErr_Occurred()) { if (do_decref) { Py_DECREF(v); } return -1; } if (i >= 0) ((unsigned long *)ap->ob_item)[i] = x; if (do_decref) { Py_DECREF(v); } return 0; } static PyObject * q_getitem(arrayobject *ap, Py_ssize_t i) { return PyLong_FromLongLong(((long long *)ap->ob_item)[i]); } static int q_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v) { long long x; if (!PyArg_Parse(v, "L;array item must be integer", &x)) return -1; if (i >= 0) ((long long *)ap->ob_item)[i] = x; return 0; } static PyObject * QQ_getitem(arrayobject *ap, Py_ssize_t i) { return PyLong_FromUnsignedLongLong( ((unsigned long long *)ap->ob_item)[i]); } static int QQ_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v) { unsigned long long x; int do_decref = 0; /* if nb_int was called */ if (!PyLong_Check(v)) { v = _PyNumber_Index(v); if (NULL == v) { return -1; } do_decref = 1; } x = PyLong_AsUnsignedLongLong(v); if (x == (unsigned long long)-1 && PyErr_Occurred()) { if (do_decref) { Py_DECREF(v); } return -1; } if (i >= 0) ((unsigned long long *)ap->ob_item)[i] = x; if (do_decref) { Py_DECREF(v); } return 0; } static PyObject * f_getitem(arrayobject *ap, Py_ssize_t i) { return PyFloat_FromDouble((double) ((float *)ap->ob_item)[i]); } static int f_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v) { float x; if (!PyArg_Parse(v, "f;array item must be float", &x)) return -1; if (i >= 0) ((float *)ap->ob_item)[i] = x; return 0; } static PyObject * d_getitem(arrayobject *ap, Py_ssize_t i) { return PyFloat_FromDouble(((double *)ap->ob_item)[i]); } static int d_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v) { double x; if (!PyArg_Parse(v, "d;array item must be float", &x)) return -1; if (i >= 0) ((double *)ap->ob_item)[i] = x; return 0; } #define DEFINE_COMPAREITEMS(code, type) \ static int \ code##_compareitems(const void *lhs, const void *rhs, Py_ssize_t length) \ { \ const type *a = lhs, *b = rhs; \ for (Py_ssize_t i = 0; i < length; ++i) \ if (a[i] != b[i]) \ return a[i] < b[i] ? -1 : 1; \ return 0; \ } DEFINE_COMPAREITEMS(b, signed char) DEFINE_COMPAREITEMS(BB, unsigned char) DEFINE_COMPAREITEMS(u, wchar_t) DEFINE_COMPAREITEMS(h, short) DEFINE_COMPAREITEMS(HH, unsigned short) DEFINE_COMPAREITEMS(i, int) DEFINE_COMPAREITEMS(II, unsigned int) DEFINE_COMPAREITEMS(l, long) DEFINE_COMPAREITEMS(LL, unsigned long) DEFINE_COMPAREITEMS(q, long long) DEFINE_COMPAREITEMS(QQ, unsigned long long) /* Description of types. * * Don't forget to update typecode_to_mformat_code() if you add a new * typecode. */ static const struct arraydescr descriptors[] = { {'b', 1, b_getitem, b_setitem, b_compareitems, "b", 1, 1}, {'B', 1, BB_getitem, BB_setitem, BB_compareitems, "B", 1, 0}, {'u', sizeof(wchar_t), u_getitem, u_setitem, u_compareitems, "u", 0, 0}, {'h', sizeof(short), h_getitem, h_setitem, h_compareitems, "h", 1, 1}, {'H', sizeof(short), HH_getitem, HH_setitem, HH_compareitems, "H", 1, 0}, {'i', sizeof(int), i_getitem, i_setitem, i_compareitems, "i", 1, 1}, {'I', sizeof(int), II_getitem, II_setitem, II_compareitems, "I", 1, 0}, {'l', sizeof(long), l_getitem, l_setitem, l_compareitems, "l", 1, 1}, {'L', sizeof(long), LL_getitem, LL_setitem, LL_compareitems, "L", 1, 0}, {'q', sizeof(long long), q_getitem, q_setitem, q_compareitems, "q", 1, 1}, {'Q', sizeof(long long), QQ_getitem, QQ_setitem, QQ_compareitems, "Q", 1, 0}, {'f', sizeof(float), f_getitem, f_setitem, NULL, "f", 0, 0}, {'d', sizeof(double), d_getitem, d_setitem, NULL, "d", 0, 0}, {'\0', 0, 0, 0, 0, 0, 0} /* Sentinel */ }; /**************************************************************************** Implementations of array object methods. ****************************************************************************/ /*[clinic input] class array.array "arrayobject *" "ArrayType" [clinic start generated code]*/ /*[clinic end generated code: output=da39a3ee5e6b4b0d input=a5c29edf59f176a3]*/ static PyObject * newarrayobject(PyTypeObject *type, Py_ssize_t size, const struct arraydescr *descr) { arrayobject *op; size_t nbytes; if (size < 0) { PyErr_BadInternalCall(); return NULL; } /* Check for overflow */ if (size > PY_SSIZE_T_MAX / descr->itemsize) { return PyErr_NoMemory(); } nbytes = size * descr->itemsize; op = (arrayobject *) type->tp_alloc(type, 0); if (op == NULL) { return NULL; } op->ob_descr = descr; op->allocated = size; op->weakreflist = NULL; Py_SET_SIZE(op, size); if (size <= 0) { op->ob_item = NULL; } else { op->ob_item = PyMem_NEW(char, nbytes); if (op->ob_item == NULL) { Py_DECREF(op); return PyErr_NoMemory(); } } op->ob_exports = 0; return (PyObject *) op; } static PyObject * getarrayitem(PyObject *op, Py_ssize_t i) { #ifndef NDEBUG array_state *state = find_array_state_by_type(Py_TYPE(op)); assert(array_Check(op, state)); #endif arrayobject *ap; ap = (arrayobject *)op; assert(i>=0 && i<Py_SIZE(ap)); return (*ap->ob_descr->getitem)(ap, i); } static int ins1(arrayobject *self, Py_ssize_t where, PyObject *v) { char *items; Py_ssize_t n = Py_SIZE(self); if (v == NULL) { PyErr_BadInternalCall(); return -1; } if ((*self->ob_descr->setitem)(self, -1, v) < 0) return -1; if (array_resize(self, n+1) == -1) return -1; items = self->ob_item; if (where < 0) { where += n; if (where < 0) where = 0; } if (where > n) where = n; /* appends don't need to call memmove() */ if (where != n) memmove(items + (where+1)*self->ob_descr->itemsize, items + where*self->ob_descr->itemsize, (n-where)*self->ob_descr->itemsize); return (*self->ob_descr->setitem)(self, where, v); } /* Methods */ static int array_tp_traverse(arrayobject *op, visitproc visit, void *arg) { Py_VISIT(Py_TYPE(op)); return 0; } static void array_dealloc(arrayobject *op) { PyTypeObject *tp = Py_TYPE(op); PyObject_GC_UnTrack(op); if (op->weakreflist != NULL) PyObject_ClearWeakRefs((PyObject *) op); if (op->ob_item != NULL) PyMem_Free(op->ob_item); tp->tp_free(op); Py_DECREF(tp); } static PyObject * array_richcompare(PyObject *v, PyObject *w, int op) { array_state *state = find_array_state_by_type(Py_TYPE(v)); arrayobject *va, *wa; PyObject *vi = NULL; PyObject *wi = NULL; Py_ssize_t i, k; PyObject *res; if (!array_Check(v, state) || !array_Check(w, state)) Py_RETURN_NOTIMPLEMENTED; va = (arrayobject *)v; wa = (arrayobject *)w; if (Py_SIZE(va) != Py_SIZE(wa) && (op == Py_EQ || op == Py_NE)) { /* Shortcut: if the lengths differ, the arrays differ */ if (op == Py_EQ) res = Py_False; else res = Py_True; return Py_NewRef(res); } if (va->ob_descr == wa->ob_descr && va->ob_descr->compareitems != NULL) { /* Fast path: arrays with same types can have their buffers compared directly */ Py_ssize_t common_length = Py_MIN(Py_SIZE(va), Py_SIZE(wa)); int result = va->ob_descr->compareitems(va->ob_item, wa->ob_item, common_length); if (result == 0) goto compare_sizes; int cmp; switch (op) { case Py_LT: cmp = result < 0; break; case Py_LE: cmp = result <= 0; break; case Py_EQ: cmp = result == 0; break; case Py_NE: cmp = result != 0; break; case Py_GT: cmp = result > 0; break; case Py_GE: cmp = result >= 0; break; default: return NULL; /* cannot happen */ } PyObject *res = cmp ? Py_True : Py_False; return Py_NewRef(res); } /* Search for the first index where items are different */ k = 1; for (i = 0; i < Py_SIZE(va) && i < Py_SIZE(wa); i++) { vi = getarrayitem(v, i); if (vi == NULL) { return NULL; } wi = getarrayitem(w, i); if (wi == NULL) { Py_DECREF(vi); return NULL; } k = PyObject_RichCompareBool(vi, wi, Py_EQ); if (k == 0) break; /* Keeping vi and wi alive! */ Py_DECREF(vi); Py_DECREF(wi); if (k < 0) return NULL; } if (k) { /* No more items to compare -- compare sizes */ compare_sizes: ; Py_ssize_t vs = Py_SIZE(va); Py_ssize_t ws = Py_SIZE(wa); int cmp; switch (op) { case Py_LT: cmp = vs < ws; break; case Py_LE: cmp = vs <= ws; break; /* If the lengths were not equal, the earlier fast-path check would have caught that. */ case Py_EQ: assert(vs == ws); cmp = 1; break; case Py_NE: assert(vs == ws); cmp = 0; break; case Py_GT: cmp = vs > ws; break; case Py_GE: cmp = vs >= ws; break; default: return NULL; /* cannot happen */ } if (cmp) res = Py_True; else res = Py_False; return Py_NewRef(res); } /* We have an item that differs. First, shortcuts for EQ/NE */ if (op == Py_EQ) { res = Py_NewRef(Py_False); } else if (op == Py_NE) { res = Py_NewRef(Py_True); } else { /* Compare the final item again using the proper operator */ res = PyObject_RichCompare(vi, wi, op); } Py_DECREF(vi); Py_DECREF(wi); return res; } static Py_ssize_t array_length(arrayobject *a) { return Py_SIZE(a); } static PyObject * array_item(arrayobject *a, Py_ssize_t i) { if (i < 0 || i >= Py_SIZE(a)) { PyErr_SetString(PyExc_IndexError, "array index out of range"); return NULL; } return getarrayitem((PyObject *)a, i); } static PyObject * array_slice(arrayobject *a, Py_ssize_t ilow, Py_ssize_t ihigh) { array_state *state = find_array_state_by_type(Py_TYPE(a)); arrayobject *np; if (ilow < 0) ilow = 0; else if (ilow > Py_SIZE(a)) ilow = Py_SIZE(a); if (ihigh < 0) ihigh = 0; if (ihigh < ilow) ihigh = ilow; else if (ihigh > Py_SIZE(a)) ihigh = Py_SIZE(a); np = (arrayobject *) newarrayobject(state->ArrayType, ihigh - ilow, a->ob_descr); if (np == NULL) return NULL; if (ihigh > ilow) { memcpy(np->ob_item, a->ob_item + ilow * a->ob_descr->itemsize, (ihigh-ilow) * a->ob_descr->itemsize); } return (PyObject *)np; } /*[clinic input] array.array.__copy__ Return a copy of the array. [clinic start generated code]*/ static PyObject * array_array___copy___impl(arrayobject *self) /*[clinic end generated code: output=dec7c3f925d9619e input=ad1ee5b086965f09]*/ { return array_slice(self, 0, Py_SIZE(self)); } /*[clinic input] array.array.__deepcopy__ unused: object / Return a copy of the array. [clinic start generated code]*/ static PyObject * array_array___deepcopy__(arrayobject *self, PyObject *unused) /*[clinic end generated code: output=1ec748d8e14a9faa input=2405ecb4933748c4]*/ { return array_array___copy___impl(self); } static PyObject * array_concat(arrayobject *a, PyObject *bb) { array_state *state = find_array_state_by_type(Py_TYPE(a)); Py_ssize_t size; arrayobject *np; if (!array_Check(bb, state)) { PyErr_Format(PyExc_TypeError, "can only append array (not \"%.200s\") to array", Py_TYPE(bb)->tp_name); return NULL; } #define b ((arrayobject *)bb) if (a->ob_descr != b->ob_descr) { PyErr_BadArgument(); return NULL; } if (Py_SIZE(a) > PY_SSIZE_T_MAX - Py_SIZE(b)) { return PyErr_NoMemory(); } size = Py_SIZE(a) + Py_SIZE(b); np = (arrayobject *) newarrayobject(state->ArrayType, size, a->ob_descr); if (np == NULL) { return NULL; } if (Py_SIZE(a) > 0) { memcpy(np->ob_item, a->ob_item, Py_SIZE(a)*a->ob_descr->itemsize); } if (Py_SIZE(b) > 0) { memcpy(np->ob_item + Py_SIZE(a)*a->ob_descr->itemsize, b->ob_item, Py_SIZE(b)*b->ob_descr->itemsize); } return (PyObject *)np; #undef b } static PyObject * array_repeat(arrayobject *a, Py_ssize_t n) { array_state *state = find_array_state_by_type(Py_TYPE(a)); if (n < 0) n = 0; const Py_ssize_t array_length = Py_SIZE(a); if ((array_length != 0) && (n > PY_SSIZE_T_MAX / array_length)) { return PyErr_NoMemory(); } Py_ssize_t size = array_length * n; arrayobject* np = (arrayobject *) newarrayobject(state->ArrayType, size, a->ob_descr); if (np == NULL) return NULL; if (size == 0) return (PyObject *)np; const Py_ssize_t oldbytes = array_length * a->ob_descr->itemsize; const Py_ssize_t newbytes = oldbytes * n; _PyBytes_Repeat(np->ob_item, newbytes, a->ob_item, oldbytes); return (PyObject *)np; } static int array_del_slice(arrayobject *a, Py_ssize_t ilow, Py_ssize_t ihigh) { char *item; Py_ssize_t d; /* Change in size */ if (ilow < 0) ilow = 0; else if (ilow > Py_SIZE(a)) ilow = Py_SIZE(a); if (ihigh < 0) ihigh = 0; if (ihigh < ilow) ihigh = ilow; else if (ihigh > Py_SIZE(a)) ihigh = Py_SIZE(a); item = a->ob_item; d = ihigh-ilow; /* Issue #4509: If the array has exported buffers and the slice assignment would change the size of the array, fail early to make sure we don't modify it. */ if (d != 0 && a->ob_exports > 0) { PyErr_SetString(PyExc_BufferError, "cannot resize an array that is exporting buffers"); return -1; } if (d > 0) { /* Delete d items */ memmove(item + (ihigh-d)*a->ob_descr->itemsize, item + ihigh*a->ob_descr->itemsize, (Py_SIZE(a)-ihigh)*a->ob_descr->itemsize); if (array_resize(a, Py_SIZE(a) - d) == -1) return -1; } return 0; } static int array_ass_item(arrayobject *a, Py_ssize_t i, PyObject *v) { if (i < 0 || i >= Py_SIZE(a)) { PyErr_SetString(PyExc_IndexError, "array assignment index out of range"); return -1; } if (v == NULL) return array_del_slice(a, i, i+1); return (*a->ob_descr->setitem)(a, i, v); } static int setarrayitem(PyObject *a, Py_ssize_t i, PyObject *v) { #ifndef NDEBUG array_state *state = find_array_state_by_type(Py_TYPE(a)); assert(array_Check(a, state)); #endif return array_ass_item((arrayobject *)a, i, v); } static int array_iter_extend(arrayobject *self, PyObject *bb) { PyObject *it, *v; it = PyObject_GetIter(bb); if (it == NULL) return -1; while ((v = PyIter_Next(it)) != NULL) { if (ins1(self, Py_SIZE(self), v) != 0) { |
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