1236 lines
38 KiB
C
1236 lines
38 KiB
C
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#include "Python.h"
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PyDoc_STRVAR(operator_doc,
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"Operator interface.\n\
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\n\
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This module exports a set of functions implemented in C corresponding\n\
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to the intrinsic operators of Python. For example, operator.add(x, y)\n\
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is equivalent to the expression x+y. The function names are those\n\
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used for special methods; variants without leading and trailing\n\
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'__' are also provided for convenience.");
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#define spam1(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a1) { \
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return AOP(a1); }
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#define spam2(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \
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PyObject *a1, *a2; \
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if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \
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return AOP(a1,a2); }
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#define spamoi(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \
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PyObject *a1; int a2; \
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if(! PyArg_ParseTuple(a,"Oi:" #OP,&a1,&a2)) return NULL; \
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return AOP(a1,a2); }
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#define spam2n(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \
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PyObject *a1, *a2; \
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if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \
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if(-1 == AOP(a1,a2)) return NULL; \
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Py_INCREF(Py_None); \
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return Py_None; }
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#define spam3n(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \
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PyObject *a1, *a2, *a3; \
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if(! PyArg_UnpackTuple(a,#OP,3,3,&a1,&a2,&a3)) return NULL; \
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if(-1 == AOP(a1,a2,a3)) return NULL; \
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Py_INCREF(Py_None); \
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return Py_None; }
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#define spami(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a1) { \
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long r; \
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if(-1 == (r=AOP(a1))) return NULL; \
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return PyBool_FromLong(r); }
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#define spami2(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \
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PyObject *a1, *a2; long r; \
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if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \
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if(-1 == (r=AOP(a1,a2))) return NULL; \
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return PyLong_FromLong(r); }
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#define spamn2(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \
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PyObject *a1, *a2; Py_ssize_t r; \
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if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \
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if(-1 == (r=AOP(a1,a2))) return NULL; \
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return PyLong_FromSsize_t(r); }
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#define spami2b(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \
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PyObject *a1, *a2; long r; \
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if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \
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if(-1 == (r=AOP(a1,a2))) return NULL; \
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return PyBool_FromLong(r); }
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#define spamrc(OP,A) static PyObject *OP(PyObject *s, PyObject *a) { \
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PyObject *a1, *a2; \
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if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \
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return PyObject_RichCompare(a1,a2,A); }
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spami(truth , PyObject_IsTrue)
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spam2(op_add , PyNumber_Add)
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spam2(op_sub , PyNumber_Subtract)
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spam2(op_mul , PyNumber_Multiply)
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spam2(op_matmul , PyNumber_MatrixMultiply)
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spam2(op_floordiv , PyNumber_FloorDivide)
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spam2(op_truediv , PyNumber_TrueDivide)
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spam2(op_mod , PyNumber_Remainder)
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spam1(op_neg , PyNumber_Negative)
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spam1(op_pos , PyNumber_Positive)
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spam1(op_abs , PyNumber_Absolute)
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spam1(op_inv , PyNumber_Invert)
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spam1(op_invert , PyNumber_Invert)
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spam2(op_lshift , PyNumber_Lshift)
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spam2(op_rshift , PyNumber_Rshift)
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spami(op_not_ , PyObject_Not)
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spam2(op_and_ , PyNumber_And)
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spam2(op_xor , PyNumber_Xor)
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spam2(op_or_ , PyNumber_Or)
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spam2(op_iadd , PyNumber_InPlaceAdd)
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spam2(op_isub , PyNumber_InPlaceSubtract)
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spam2(op_imul , PyNumber_InPlaceMultiply)
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spam2(op_imatmul , PyNumber_InPlaceMatrixMultiply)
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spam2(op_ifloordiv , PyNumber_InPlaceFloorDivide)
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spam2(op_itruediv , PyNumber_InPlaceTrueDivide)
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spam2(op_imod , PyNumber_InPlaceRemainder)
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spam2(op_ilshift , PyNumber_InPlaceLshift)
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spam2(op_irshift , PyNumber_InPlaceRshift)
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spam2(op_iand , PyNumber_InPlaceAnd)
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spam2(op_ixor , PyNumber_InPlaceXor)
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spam2(op_ior , PyNumber_InPlaceOr)
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spam2(op_concat , PySequence_Concat)
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spam2(op_iconcat , PySequence_InPlaceConcat)
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spami2b(op_contains , PySequence_Contains)
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spamn2(indexOf , PySequence_Index)
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spamn2(countOf , PySequence_Count)
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spam2(op_getitem , PyObject_GetItem)
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spam2n(op_delitem , PyObject_DelItem)
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spam3n(op_setitem , PyObject_SetItem)
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spamrc(op_lt , Py_LT)
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spamrc(op_le , Py_LE)
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spamrc(op_eq , Py_EQ)
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spamrc(op_ne , Py_NE)
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spamrc(op_gt , Py_GT)
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spamrc(op_ge , Py_GE)
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static PyObject*
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op_pow(PyObject *s, PyObject *a)
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{
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PyObject *a1, *a2;
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if (PyArg_UnpackTuple(a,"pow", 2, 2, &a1, &a2))
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return PyNumber_Power(a1, a2, Py_None);
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return NULL;
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}
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static PyObject*
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op_ipow(PyObject *s, PyObject *a)
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{
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PyObject *a1, *a2;
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if (PyArg_UnpackTuple(a,"ipow", 2, 2, &a1, &a2))
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return PyNumber_InPlacePower(a1, a2, Py_None);
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return NULL;
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}
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static PyObject *
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op_index(PyObject *s, PyObject *a)
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{
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return PyNumber_Index(a);
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}
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static PyObject*
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is_(PyObject *s, PyObject *a)
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{
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PyObject *a1, *a2, *result = NULL;
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if (PyArg_UnpackTuple(a,"is_", 2, 2, &a1, &a2)) {
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result = (a1 == a2) ? Py_True : Py_False;
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Py_INCREF(result);
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}
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return result;
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}
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static PyObject*
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is_not(PyObject *s, PyObject *a)
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{
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PyObject *a1, *a2, *result = NULL;
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if (PyArg_UnpackTuple(a,"is_not", 2, 2, &a1, &a2)) {
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result = (a1 != a2) ? Py_True : Py_False;
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Py_INCREF(result);
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}
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return result;
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}
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#undef spam1
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#undef spam2
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#undef spam1o
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#undef spam1o
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/* compare_digest **********************************************************/
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/*
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* timing safe compare
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*
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* Returns 1 of the strings are equal.
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* In case of len(a) != len(b) the function tries to keep the timing
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* dependent on the length of b. CPU cache locally may still alter timing
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* a bit.
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*/
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static int
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_tscmp(const unsigned char *a, const unsigned char *b,
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Py_ssize_t len_a, Py_ssize_t len_b)
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{
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/* The volatile type declarations make sure that the compiler has no
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* chance to optimize and fold the code in any way that may change
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* the timing.
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*/
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volatile Py_ssize_t length;
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volatile const unsigned char *left;
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volatile const unsigned char *right;
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Py_ssize_t i;
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unsigned char result;
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/* loop count depends on length of b */
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length = len_b;
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left = NULL;
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right = b;
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/* don't use else here to keep the amount of CPU instructions constant,
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* volatile forces re-evaluation
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* */
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if (len_a == length) {
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left = *((volatile const unsigned char**)&a);
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result = 0;
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}
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if (len_a != length) {
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left = b;
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result = 1;
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}
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for (i=0; i < length; i++) {
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result |= *left++ ^ *right++;
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}
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return (result == 0);
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}
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PyDoc_STRVAR(length_hint__doc__,
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"length_hint(obj, default=0) -> int\n"
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"Return an estimate of the number of items in obj.\n"
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"This is useful for presizing containers when building from an\n"
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"iterable.\n"
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"\n"
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"If the object supports len(), the result will be\n"
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"exact. Otherwise, it may over- or under-estimate by an\n"
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"arbitrary amount. The result will be an integer >= 0.");
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static PyObject *length_hint(PyObject *self, PyObject *args)
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{
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PyObject *obj;
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Py_ssize_t defaultvalue = 0, res;
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if (!PyArg_ParseTuple(args, "O|n:length_hint", &obj, &defaultvalue)) {
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return NULL;
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}
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res = PyObject_LengthHint(obj, defaultvalue);
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if (res == -1 && PyErr_Occurred()) {
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return NULL;
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}
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return PyLong_FromSsize_t(res);
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}
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PyDoc_STRVAR(compare_digest__doc__,
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"compare_digest(a, b) -> bool\n"
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"\n"
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"Return 'a == b'. This function uses an approach designed to prevent\n"
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"timing analysis, making it appropriate for cryptography.\n"
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"a and b must both be of the same type: either str (ASCII only),\n"
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"or any bytes-like object.\n"
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"\n"
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"Note: If a and b are of different lengths, or if an error occurs,\n"
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"a timing attack could theoretically reveal information about the\n"
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"types and lengths of a and b--but not their values.\n");
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static PyObject*
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compare_digest(PyObject *self, PyObject *args)
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{
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PyObject *a, *b;
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int rc;
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if (!PyArg_ParseTuple(args, "OO:compare_digest", &a, &b)) {
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return NULL;
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}
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/* ASCII unicode string */
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if(PyUnicode_Check(a) && PyUnicode_Check(b)) {
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if (PyUnicode_READY(a) == -1 || PyUnicode_READY(b) == -1) {
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return NULL;
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}
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if (!PyUnicode_IS_ASCII(a) || !PyUnicode_IS_ASCII(b)) {
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PyErr_SetString(PyExc_TypeError,
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"comparing strings with non-ASCII characters is "
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"not supported");
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return NULL;
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}
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rc = _tscmp(PyUnicode_DATA(a),
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PyUnicode_DATA(b),
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PyUnicode_GET_LENGTH(a),
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PyUnicode_GET_LENGTH(b));
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}
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/* fallback to buffer interface for bytes, bytesarray and other */
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else {
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Py_buffer view_a;
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Py_buffer view_b;
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if (PyObject_CheckBuffer(a) == 0 && PyObject_CheckBuffer(b) == 0) {
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PyErr_Format(PyExc_TypeError,
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"unsupported operand types(s) or combination of types: "
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"'%.100s' and '%.100s'",
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Py_TYPE(a)->tp_name, Py_TYPE(b)->tp_name);
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return NULL;
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}
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if (PyObject_GetBuffer(a, &view_a, PyBUF_SIMPLE) == -1) {
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return NULL;
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}
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if (view_a.ndim > 1) {
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PyErr_SetString(PyExc_BufferError,
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"Buffer must be single dimension");
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PyBuffer_Release(&view_a);
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return NULL;
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}
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if (PyObject_GetBuffer(b, &view_b, PyBUF_SIMPLE) == -1) {
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PyBuffer_Release(&view_a);
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return NULL;
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}
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if (view_b.ndim > 1) {
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PyErr_SetString(PyExc_BufferError,
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"Buffer must be single dimension");
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PyBuffer_Release(&view_a);
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PyBuffer_Release(&view_b);
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return NULL;
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}
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rc = _tscmp((const unsigned char*)view_a.buf,
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(const unsigned char*)view_b.buf,
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view_a.len,
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view_b.len);
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PyBuffer_Release(&view_a);
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PyBuffer_Release(&view_b);
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}
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return PyBool_FromLong(rc);
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}
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/* operator methods **********************************************************/
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#define spam1(OP,DOC) {#OP, OP, METH_VARARGS, PyDoc_STR(DOC)},
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#define spam2(OP,DOC) {#OP, op_##OP, METH_VARARGS, PyDoc_STR(DOC)},
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#define spam1o(OP,DOC) {#OP, OP, METH_O, PyDoc_STR(DOC)},
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#define spam2o(OP,DOC) {#OP, op_##OP, METH_O, PyDoc_STR(DOC)},
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static struct PyMethodDef operator_methods[] = {
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spam1o(truth,
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"truth(a) -- Return True if a is true, False otherwise.")
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spam2(contains,
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"contains(a, b) -- Same as b in a (note reversed operands).")
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spam1(indexOf,
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"indexOf(a, b) -- Return the first index of b in a.")
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spam1(countOf,
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"countOf(a, b) -- Return the number of times b occurs in a.")
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spam1(is_, "is_(a, b) -- Same as a is b.")
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spam1(is_not, "is_not(a, b) -- Same as a is not b.")
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spam2o(index, "index(a) -- Same as a.__index__()")
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spam2(add, "add(a, b) -- Same as a + b.")
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spam2(sub, "sub(a, b) -- Same as a - b.")
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spam2(mul, "mul(a, b) -- Same as a * b.")
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spam2(matmul, "matmul(a, b) -- Same as a @ b.")
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spam2(floordiv, "floordiv(a, b) -- Same as a // b.")
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spam2(truediv, "truediv(a, b) -- Same as a / b.")
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spam2(mod, "mod(a, b) -- Same as a % b.")
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spam2o(neg, "neg(a) -- Same as -a.")
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spam2o(pos, "pos(a) -- Same as +a.")
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spam2o(abs, "abs(a) -- Same as abs(a).")
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spam2o(inv, "inv(a) -- Same as ~a.")
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spam2o(invert, "invert(a) -- Same as ~a.")
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spam2(lshift, "lshift(a, b) -- Same as a << b.")
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spam2(rshift, "rshift(a, b) -- Same as a >> b.")
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spam2o(not_, "not_(a) -- Same as not a.")
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spam2(and_, "and_(a, b) -- Same as a & b.")
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spam2(xor, "xor(a, b) -- Same as a ^ b.")
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spam2(or_, "or_(a, b) -- Same as a | b.")
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spam2(iadd, "a = iadd(a, b) -- Same as a += b.")
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spam2(isub, "a = isub(a, b) -- Same as a -= b.")
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spam2(imul, "a = imul(a, b) -- Same as a *= b.")
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spam2(imatmul, "a = imatmul(a, b) -- Same as a @= b.")
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spam2(ifloordiv, "a = ifloordiv(a, b) -- Same as a //= b.")
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spam2(itruediv, "a = itruediv(a, b) -- Same as a /= b")
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spam2(imod, "a = imod(a, b) -- Same as a %= b.")
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spam2(ilshift, "a = ilshift(a, b) -- Same as a <<= b.")
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spam2(irshift, "a = irshift(a, b) -- Same as a >>= b.")
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spam2(iand, "a = iand(a, b) -- Same as a &= b.")
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spam2(ixor, "a = ixor(a, b) -- Same as a ^= b.")
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spam2(ior, "a = ior(a, b) -- Same as a |= b.")
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spam2(concat,
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"concat(a, b) -- Same as a + b, for a and b sequences.")
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spam2(iconcat,
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"a = iconcat(a, b) -- Same as a += b, for a and b sequences.")
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spam2(getitem,
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"getitem(a, b) -- Same as a[b].")
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spam2(setitem,
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"setitem(a, b, c) -- Same as a[b] = c.")
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spam2(delitem,
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"delitem(a, b) -- Same as del a[b].")
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spam2(pow, "pow(a, b) -- Same as a ** b.")
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spam2(ipow, "a = ipow(a, b) -- Same as a **= b.")
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spam2(lt, "lt(a, b) -- Same as a<b.")
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spam2(le, "le(a, b) -- Same as a<=b.")
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spam2(eq, "eq(a, b) -- Same as a==b.")
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spam2(ne, "ne(a, b) -- Same as a!=b.")
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spam2(gt, "gt(a, b) -- Same as a>b.")
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spam2(ge, "ge(a, b) -- Same as a>=b.")
|
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|
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{"_compare_digest", (PyCFunction)compare_digest, METH_VARARGS,
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compare_digest__doc__},
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{"length_hint", (PyCFunction)length_hint, METH_VARARGS,
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length_hint__doc__},
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{NULL, NULL} /* sentinel */
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|
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};
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|
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/* itemgetter object **********************************************************/
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|
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typedef struct {
|
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PyObject_HEAD
|
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Py_ssize_t nitems;
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PyObject *item;
|
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} itemgetterobject;
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|
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static PyTypeObject itemgetter_type;
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|
|
static PyObject *
|
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itemgetter_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
|
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{
|
|
itemgetterobject *ig;
|
|
PyObject *item;
|
|
Py_ssize_t nitems;
|
|
|
|
if (!_PyArg_NoKeywords("itemgetter()", kwds))
|
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return NULL;
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|
|
nitems = PyTuple_GET_SIZE(args);
|
|
if (nitems <= 1) {
|
|
if (!PyArg_UnpackTuple(args, "itemgetter", 1, 1, &item))
|
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return NULL;
|
|
} else
|
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item = args;
|
|
|
|
/* create itemgetterobject structure */
|
|
ig = PyObject_GC_New(itemgetterobject, &itemgetter_type);
|
|
if (ig == NULL)
|
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return NULL;
|
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|
|
Py_INCREF(item);
|
|
ig->item = item;
|
|
ig->nitems = nitems;
|
|
|
|
PyObject_GC_Track(ig);
|
|
return (PyObject *)ig;
|
|
}
|
|
|
|
static void
|
|
itemgetter_dealloc(itemgetterobject *ig)
|
|
{
|
|
PyObject_GC_UnTrack(ig);
|
|
Py_XDECREF(ig->item);
|
|
PyObject_GC_Del(ig);
|
|
}
|
|
|
|
static int
|
|
itemgetter_traverse(itemgetterobject *ig, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(ig->item);
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
itemgetter_call(itemgetterobject *ig, PyObject *args, PyObject *kw)
|
|
{
|
|
PyObject *obj, *result;
|
|
Py_ssize_t i, nitems=ig->nitems;
|
|
|
|
if (kw != NULL && !_PyArg_NoKeywords("itemgetter", kw))
|
|
return NULL;
|
|
if (!PyArg_UnpackTuple(args, "itemgetter", 1, 1, &obj))
|
|
return NULL;
|
|
if (nitems == 1)
|
|
return PyObject_GetItem(obj, ig->item);
|
|
|
|
assert(PyTuple_Check(ig->item));
|
|
assert(PyTuple_GET_SIZE(ig->item) == nitems);
|
|
|
|
result = PyTuple_New(nitems);
|
|
if (result == NULL)
|
|
return NULL;
|
|
|
|
for (i=0 ; i < nitems ; i++) {
|
|
PyObject *item, *val;
|
|
item = PyTuple_GET_ITEM(ig->item, i);
|
|
val = PyObject_GetItem(obj, item);
|
|
if (val == NULL) {
|
|
Py_DECREF(result);
|
|
return NULL;
|
|
}
|
|
PyTuple_SET_ITEM(result, i, val);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static PyObject *
|
|
itemgetter_repr(itemgetterobject *ig)
|
|
{
|
|
PyObject *repr;
|
|
const char *reprfmt;
|
|
|
|
int status = Py_ReprEnter((PyObject *)ig);
|
|
if (status != 0) {
|
|
if (status < 0)
|
|
return NULL;
|
|
return PyUnicode_FromFormat("%s(...)", Py_TYPE(ig)->tp_name);
|
|
}
|
|
|
|
reprfmt = ig->nitems == 1 ? "%s(%R)" : "%s%R";
|
|
repr = PyUnicode_FromFormat(reprfmt, Py_TYPE(ig)->tp_name, ig->item);
|
|
Py_ReprLeave((PyObject *)ig);
|
|
return repr;
|
|
}
|
|
|
|
static PyObject *
|
|
itemgetter_reduce(itemgetterobject *ig)
|
|
{
|
|
if (ig->nitems == 1)
|
|
return Py_BuildValue("O(O)", Py_TYPE(ig), ig->item);
|
|
return PyTuple_Pack(2, Py_TYPE(ig), ig->item);
|
|
}
|
|
|
|
PyDoc_STRVAR(reduce_doc, "Return state information for pickling");
|
|
|
|
static PyMethodDef itemgetter_methods[] = {
|
|
{"__reduce__", (PyCFunction)itemgetter_reduce, METH_NOARGS,
|
|
reduce_doc},
|
|
{NULL}
|
|
};
|
|
|
|
PyDoc_STRVAR(itemgetter_doc,
|
|
"itemgetter(item, ...) --> itemgetter object\n\
|
|
\n\
|
|
Return a callable object that fetches the given item(s) from its operand.\n\
|
|
After f = itemgetter(2), the call f(r) returns r[2].\n\
|
|
After g = itemgetter(2, 5, 3), the call g(r) returns (r[2], r[5], r[3])");
|
|
|
|
static PyTypeObject itemgetter_type = {
|
|
PyVarObject_HEAD_INIT(NULL, 0)
|
|
"operator.itemgetter", /* tp_name */
|
|
sizeof(itemgetterobject), /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
/* methods */
|
|
(destructor)itemgetter_dealloc, /* tp_dealloc */
|
|
0, /* tp_print */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* tp_reserved */
|
|
(reprfunc)itemgetter_repr, /* tp_repr */
|
|
0, /* tp_as_number */
|
|
0, /* tp_as_sequence */
|
|
0, /* tp_as_mapping */
|
|
0, /* tp_hash */
|
|
(ternaryfunc)itemgetter_call, /* tp_call */
|
|
0, /* tp_str */
|
|
PyObject_GenericGetAttr, /* tp_getattro */
|
|
0, /* tp_setattro */
|
|
0, /* tp_as_buffer */
|
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */
|
|
itemgetter_doc, /* tp_doc */
|
|
(traverseproc)itemgetter_traverse, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
0, /* tp_iter */
|
|
0, /* tp_iternext */
|
|
itemgetter_methods, /* tp_methods */
|
|
0, /* tp_members */
|
|
0, /* tp_getset */
|
|
0, /* tp_base */
|
|
0, /* tp_dict */
|
|
0, /* tp_descr_get */
|
|
0, /* tp_descr_set */
|
|
0, /* tp_dictoffset */
|
|
0, /* tp_init */
|
|
0, /* tp_alloc */
|
|
itemgetter_new, /* tp_new */
|
|
0, /* tp_free */
|
|
};
|
|
|
|
|
|
/* attrgetter object **********************************************************/
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
Py_ssize_t nattrs;
|
|
PyObject *attr;
|
|
} attrgetterobject;
|
|
|
|
static PyTypeObject attrgetter_type;
|
|
|
|
static PyObject *
|
|
attrgetter_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
|
|
{
|
|
attrgetterobject *ag;
|
|
PyObject *attr;
|
|
Py_ssize_t nattrs, idx, char_idx;
|
|
|
|
if (!_PyArg_NoKeywords("attrgetter()", kwds))
|
|
return NULL;
|
|
|
|
nattrs = PyTuple_GET_SIZE(args);
|
|
if (nattrs <= 1) {
|
|
if (!PyArg_UnpackTuple(args, "attrgetter", 1, 1, &attr))
|
|
return NULL;
|
|
}
|
|
|
|
attr = PyTuple_New(nattrs);
|
|
if (attr == NULL)
|
|
return NULL;
|
|
|
|
/* prepare attr while checking args */
|
|
for (idx = 0; idx < nattrs; ++idx) {
|
|
PyObject *item = PyTuple_GET_ITEM(args, idx);
|
|
Py_ssize_t item_len;
|
|
void *data;
|
|
unsigned int kind;
|
|
int dot_count;
|
|
|
|
if (!PyUnicode_Check(item)) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"attribute name must be a string");
|
|
Py_DECREF(attr);
|
|
return NULL;
|
|
}
|
|
if (PyUnicode_READY(item)) {
|
|
Py_DECREF(attr);
|
|
return NULL;
|
|
}
|
|
item_len = PyUnicode_GET_LENGTH(item);
|
|
kind = PyUnicode_KIND(item);
|
|
data = PyUnicode_DATA(item);
|
|
|
|
/* check whethere the string is dotted */
|
|
dot_count = 0;
|
|
for (char_idx = 0; char_idx < item_len; ++char_idx) {
|
|
if (PyUnicode_READ(kind, data, char_idx) == '.')
|
|
++dot_count;
|
|
}
|
|
|
|
if (dot_count == 0) {
|
|
Py_INCREF(item);
|
|
PyUnicode_InternInPlace(&item);
|
|
PyTuple_SET_ITEM(attr, idx, item);
|
|
} else { /* make it a tuple of non-dotted attrnames */
|
|
PyObject *attr_chain = PyTuple_New(dot_count + 1);
|
|
PyObject *attr_chain_item;
|
|
Py_ssize_t unibuff_from = 0;
|
|
Py_ssize_t unibuff_till = 0;
|
|
Py_ssize_t attr_chain_idx = 0;
|
|
|
|
if (attr_chain == NULL) {
|
|
Py_DECREF(attr);
|
|
return NULL;
|
|
}
|
|
|
|
for (; dot_count > 0; --dot_count) {
|
|
while (PyUnicode_READ(kind, data, unibuff_till) != '.') {
|
|
++unibuff_till;
|
|
}
|
|
attr_chain_item = PyUnicode_Substring(item,
|
|
unibuff_from,
|
|
unibuff_till);
|
|
if (attr_chain_item == NULL) {
|
|
Py_DECREF(attr_chain);
|
|
Py_DECREF(attr);
|
|
return NULL;
|
|
}
|
|
PyUnicode_InternInPlace(&attr_chain_item);
|
|
PyTuple_SET_ITEM(attr_chain, attr_chain_idx, attr_chain_item);
|
|
++attr_chain_idx;
|
|
unibuff_till = unibuff_from = unibuff_till + 1;
|
|
}
|
|
|
|
/* now add the last dotless name */
|
|
attr_chain_item = PyUnicode_Substring(item,
|
|
unibuff_from, item_len);
|
|
if (attr_chain_item == NULL) {
|
|
Py_DECREF(attr_chain);
|
|
Py_DECREF(attr);
|
|
return NULL;
|
|
}
|
|
PyUnicode_InternInPlace(&attr_chain_item);
|
|
PyTuple_SET_ITEM(attr_chain, attr_chain_idx, attr_chain_item);
|
|
|
|
PyTuple_SET_ITEM(attr, idx, attr_chain);
|
|
}
|
|
}
|
|
|
|
/* create attrgetterobject structure */
|
|
ag = PyObject_GC_New(attrgetterobject, &attrgetter_type);
|
|
if (ag == NULL) {
|
|
Py_DECREF(attr);
|
|
return NULL;
|
|
}
|
|
|
|
ag->attr = attr;
|
|
ag->nattrs = nattrs;
|
|
|
|
PyObject_GC_Track(ag);
|
|
return (PyObject *)ag;
|
|
}
|
|
|
|
static void
|
|
attrgetter_dealloc(attrgetterobject *ag)
|
|
{
|
|
PyObject_GC_UnTrack(ag);
|
|
Py_XDECREF(ag->attr);
|
|
PyObject_GC_Del(ag);
|
|
}
|
|
|
|
static int
|
|
attrgetter_traverse(attrgetterobject *ag, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(ag->attr);
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
dotted_getattr(PyObject *obj, PyObject *attr)
|
|
{
|
|
PyObject *newobj;
|
|
|
|
/* attr is either a tuple or instance of str.
|
|
Ensured by the setup code of attrgetter_new */
|
|
if (PyTuple_CheckExact(attr)) { /* chained getattr */
|
|
Py_ssize_t name_idx = 0, name_count;
|
|
PyObject *attr_name;
|
|
|
|
name_count = PyTuple_GET_SIZE(attr);
|
|
Py_INCREF(obj);
|
|
for (name_idx = 0; name_idx < name_count; ++name_idx) {
|
|
attr_name = PyTuple_GET_ITEM(attr, name_idx);
|
|
newobj = PyObject_GetAttr(obj, attr_name);
|
|
Py_DECREF(obj);
|
|
if (newobj == NULL) {
|
|
return NULL;
|
|
}
|
|
/* here */
|
|
obj = newobj;
|
|
}
|
|
} else { /* single getattr */
|
|
newobj = PyObject_GetAttr(obj, attr);
|
|
if (newobj == NULL)
|
|
return NULL;
|
|
obj = newobj;
|
|
}
|
|
|
|
return obj;
|
|
}
|
|
|
|
static PyObject *
|
|
attrgetter_call(attrgetterobject *ag, PyObject *args, PyObject *kw)
|
|
{
|
|
PyObject *obj, *result;
|
|
Py_ssize_t i, nattrs=ag->nattrs;
|
|
|
|
if (kw != NULL && !_PyArg_NoKeywords("attrgetter", kw))
|
|
return NULL;
|
|
if (!PyArg_UnpackTuple(args, "attrgetter", 1, 1, &obj))
|
|
return NULL;
|
|
if (ag->nattrs == 1) /* ag->attr is always a tuple */
|
|
return dotted_getattr(obj, PyTuple_GET_ITEM(ag->attr, 0));
|
|
|
|
assert(PyTuple_Check(ag->attr));
|
|
assert(PyTuple_GET_SIZE(ag->attr) == nattrs);
|
|
|
|
result = PyTuple_New(nattrs);
|
|
if (result == NULL)
|
|
return NULL;
|
|
|
|
for (i=0 ; i < nattrs ; i++) {
|
|
PyObject *attr, *val;
|
|
attr = PyTuple_GET_ITEM(ag->attr, i);
|
|
val = dotted_getattr(obj, attr);
|
|
if (val == NULL) {
|
|
Py_DECREF(result);
|
|
return NULL;
|
|
}
|
|
PyTuple_SET_ITEM(result, i, val);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static PyObject *
|
|
dotjoinattr(PyObject *attr, PyObject **attrsep)
|
|
{
|
|
if (PyTuple_CheckExact(attr)) {
|
|
if (*attrsep == NULL) {
|
|
*attrsep = PyUnicode_FromString(".");
|
|
if (*attrsep == NULL)
|
|
return NULL;
|
|
}
|
|
return PyUnicode_Join(*attrsep, attr);
|
|
} else {
|
|
Py_INCREF(attr);
|
|
return attr;
|
|
}
|
|
}
|
|
|
|
static PyObject *
|
|
attrgetter_args(attrgetterobject *ag)
|
|
{
|
|
Py_ssize_t i;
|
|
PyObject *attrsep = NULL;
|
|
PyObject *attrstrings = PyTuple_New(ag->nattrs);
|
|
if (attrstrings == NULL)
|
|
return NULL;
|
|
|
|
for (i = 0; i < ag->nattrs; ++i) {
|
|
PyObject *attr = PyTuple_GET_ITEM(ag->attr, i);
|
|
PyObject *attrstr = dotjoinattr(attr, &attrsep);
|
|
if (attrstr == NULL) {
|
|
Py_XDECREF(attrsep);
|
|
Py_DECREF(attrstrings);
|
|
return NULL;
|
|
}
|
|
PyTuple_SET_ITEM(attrstrings, i, attrstr);
|
|
}
|
|
Py_XDECREF(attrsep);
|
|
return attrstrings;
|
|
}
|
|
|
|
static PyObject *
|
|
attrgetter_repr(attrgetterobject *ag)
|
|
{
|
|
PyObject *repr = NULL;
|
|
int status = Py_ReprEnter((PyObject *)ag);
|
|
if (status != 0) {
|
|
if (status < 0)
|
|
return NULL;
|
|
return PyUnicode_FromFormat("%s(...)", Py_TYPE(ag)->tp_name);
|
|
}
|
|
|
|
if (ag->nattrs == 1) {
|
|
PyObject *attrsep = NULL;
|
|
PyObject *attr = dotjoinattr(PyTuple_GET_ITEM(ag->attr, 0), &attrsep);
|
|
if (attr != NULL) {
|
|
repr = PyUnicode_FromFormat("%s(%R)", Py_TYPE(ag)->tp_name, attr);
|
|
Py_DECREF(attr);
|
|
}
|
|
Py_XDECREF(attrsep);
|
|
}
|
|
else {
|
|
PyObject *attrstrings = attrgetter_args(ag);
|
|
if (attrstrings != NULL) {
|
|
repr = PyUnicode_FromFormat("%s%R",
|
|
Py_TYPE(ag)->tp_name, attrstrings);
|
|
Py_DECREF(attrstrings);
|
|
}
|
|
}
|
|
Py_ReprLeave((PyObject *)ag);
|
|
return repr;
|
|
}
|
|
|
|
static PyObject *
|
|
attrgetter_reduce(attrgetterobject *ag)
|
|
{
|
|
PyObject *attrstrings = attrgetter_args(ag);
|
|
if (attrstrings == NULL)
|
|
return NULL;
|
|
|
|
return Py_BuildValue("ON", Py_TYPE(ag), attrstrings);
|
|
}
|
|
|
|
static PyMethodDef attrgetter_methods[] = {
|
|
{"__reduce__", (PyCFunction)attrgetter_reduce, METH_NOARGS,
|
|
reduce_doc},
|
|
{NULL}
|
|
};
|
|
|
|
PyDoc_STRVAR(attrgetter_doc,
|
|
"attrgetter(attr, ...) --> attrgetter object\n\
|
|
\n\
|
|
Return a callable object that fetches the given attribute(s) from its operand.\n\
|
|
After f = attrgetter('name'), the call f(r) returns r.name.\n\
|
|
After g = attrgetter('name', 'date'), the call g(r) returns (r.name, r.date).\n\
|
|
After h = attrgetter('name.first', 'name.last'), the call h(r) returns\n\
|
|
(r.name.first, r.name.last).");
|
|
|
|
static PyTypeObject attrgetter_type = {
|
|
PyVarObject_HEAD_INIT(NULL, 0)
|
|
"operator.attrgetter", /* tp_name */
|
|
sizeof(attrgetterobject), /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
/* methods */
|
|
(destructor)attrgetter_dealloc, /* tp_dealloc */
|
|
0, /* tp_print */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* tp_reserved */
|
|
(reprfunc)attrgetter_repr, /* tp_repr */
|
|
0, /* tp_as_number */
|
|
0, /* tp_as_sequence */
|
|
0, /* tp_as_mapping */
|
|
0, /* tp_hash */
|
|
(ternaryfunc)attrgetter_call, /* tp_call */
|
|
0, /* tp_str */
|
|
PyObject_GenericGetAttr, /* tp_getattro */
|
|
0, /* tp_setattro */
|
|
0, /* tp_as_buffer */
|
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */
|
|
attrgetter_doc, /* tp_doc */
|
|
(traverseproc)attrgetter_traverse, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
0, /* tp_iter */
|
|
0, /* tp_iternext */
|
|
attrgetter_methods, /* tp_methods */
|
|
0, /* tp_members */
|
|
0, /* tp_getset */
|
|
0, /* tp_base */
|
|
0, /* tp_dict */
|
|
0, /* tp_descr_get */
|
|
0, /* tp_descr_set */
|
|
0, /* tp_dictoffset */
|
|
0, /* tp_init */
|
|
0, /* tp_alloc */
|
|
attrgetter_new, /* tp_new */
|
|
0, /* tp_free */
|
|
};
|
|
|
|
|
|
/* methodcaller object **********************************************************/
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
PyObject *name;
|
|
PyObject *args;
|
|
PyObject *kwds;
|
|
} methodcallerobject;
|
|
|
|
static PyTypeObject methodcaller_type;
|
|
|
|
static PyObject *
|
|
methodcaller_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
|
|
{
|
|
methodcallerobject *mc;
|
|
PyObject *name;
|
|
|
|
if (PyTuple_GET_SIZE(args) < 1) {
|
|
PyErr_SetString(PyExc_TypeError, "methodcaller needs at least "
|
|
"one argument, the method name");
|
|
return NULL;
|
|
}
|
|
|
|
name = PyTuple_GET_ITEM(args, 0);
|
|
if (!PyUnicode_Check(name)) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"method name must be a string");
|
|
return NULL;
|
|
}
|
|
|
|
/* create methodcallerobject structure */
|
|
mc = PyObject_GC_New(methodcallerobject, &methodcaller_type);
|
|
if (mc == NULL)
|
|
return NULL;
|
|
|
|
name = PyTuple_GET_ITEM(args, 0);
|
|
Py_INCREF(name);
|
|
PyUnicode_InternInPlace(&name);
|
|
mc->name = name;
|
|
|
|
Py_XINCREF(kwds);
|
|
mc->kwds = kwds;
|
|
|
|
mc->args = PyTuple_GetSlice(args, 1, PyTuple_GET_SIZE(args));
|
|
if (mc->args == NULL) {
|
|
Py_DECREF(mc);
|
|
return NULL;
|
|
}
|
|
|
|
PyObject_GC_Track(mc);
|
|
return (PyObject *)mc;
|
|
}
|
|
|
|
static void
|
|
methodcaller_dealloc(methodcallerobject *mc)
|
|
{
|
|
PyObject_GC_UnTrack(mc);
|
|
Py_XDECREF(mc->name);
|
|
Py_XDECREF(mc->args);
|
|
Py_XDECREF(mc->kwds);
|
|
PyObject_GC_Del(mc);
|
|
}
|
|
|
|
static int
|
|
methodcaller_traverse(methodcallerobject *mc, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(mc->args);
|
|
Py_VISIT(mc->kwds);
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
methodcaller_call(methodcallerobject *mc, PyObject *args, PyObject *kw)
|
|
{
|
|
PyObject *method, *obj, *result;
|
|
|
|
if (kw != NULL && !_PyArg_NoKeywords("methodcaller", kw))
|
|
return NULL;
|
|
if (!PyArg_UnpackTuple(args, "methodcaller", 1, 1, &obj))
|
|
return NULL;
|
|
method = PyObject_GetAttr(obj, mc->name);
|
|
if (method == NULL)
|
|
return NULL;
|
|
result = PyObject_Call(method, mc->args, mc->kwds);
|
|
Py_DECREF(method);
|
|
return result;
|
|
}
|
|
|
|
static PyObject *
|
|
methodcaller_repr(methodcallerobject *mc)
|
|
{
|
|
PyObject *argreprs, *repr = NULL, *sep, *joinedargreprs;
|
|
Py_ssize_t numtotalargs, numposargs, numkwdargs, i;
|
|
int status = Py_ReprEnter((PyObject *)mc);
|
|
if (status != 0) {
|
|
if (status < 0)
|
|
return NULL;
|
|
return PyUnicode_FromFormat("%s(...)", Py_TYPE(mc)->tp_name);
|
|
}
|
|
|
|
if (mc->kwds != NULL) {
|
|
numkwdargs = PyDict_Size(mc->kwds);
|
|
if (numkwdargs < 0) {
|
|
Py_ReprLeave((PyObject *)mc);
|
|
return NULL;
|
|
}
|
|
} else {
|
|
numkwdargs = 0;
|
|
}
|
|
|
|
numposargs = PyTuple_GET_SIZE(mc->args);
|
|
numtotalargs = numposargs + numkwdargs;
|
|
|
|
if (numtotalargs == 0) {
|
|
repr = PyUnicode_FromFormat("%s(%R)", Py_TYPE(mc)->tp_name, mc->name);
|
|
Py_ReprLeave((PyObject *)mc);
|
|
return repr;
|
|
}
|
|
|
|
argreprs = PyTuple_New(numtotalargs);
|
|
if (argreprs == NULL) {
|
|
Py_ReprLeave((PyObject *)mc);
|
|
return NULL;
|
|
}
|
|
|
|
for (i = 0; i < numposargs; ++i) {
|
|
PyObject *onerepr = PyObject_Repr(PyTuple_GET_ITEM(mc->args, i));
|
|
if (onerepr == NULL)
|
|
goto done;
|
|
PyTuple_SET_ITEM(argreprs, i, onerepr);
|
|
}
|
|
|
|
if (numkwdargs != 0) {
|
|
PyObject *key, *value;
|
|
Py_ssize_t pos = 0;
|
|
while (PyDict_Next(mc->kwds, &pos, &key, &value)) {
|
|
PyObject *onerepr = PyUnicode_FromFormat("%U=%R", key, value);
|
|
if (onerepr == NULL)
|
|
goto done;
|
|
if (i >= numtotalargs) {
|
|
i = -1;
|
|
break;
|
|
}
|
|
PyTuple_SET_ITEM(argreprs, i, onerepr);
|
|
++i;
|
|
}
|
|
if (i != numtotalargs) {
|
|
PyErr_SetString(PyExc_RuntimeError,
|
|
"keywords dict changed size during iteration");
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
sep = PyUnicode_FromString(", ");
|
|
if (sep == NULL)
|
|
goto done;
|
|
|
|
joinedargreprs = PyUnicode_Join(sep, argreprs);
|
|
Py_DECREF(sep);
|
|
if (joinedargreprs == NULL)
|
|
goto done;
|
|
|
|
repr = PyUnicode_FromFormat("%s(%R, %U)", Py_TYPE(mc)->tp_name,
|
|
mc->name, joinedargreprs);
|
|
Py_DECREF(joinedargreprs);
|
|
|
|
done:
|
|
Py_DECREF(argreprs);
|
|
Py_ReprLeave((PyObject *)mc);
|
|
return repr;
|
|
}
|
|
|
|
static PyObject *
|
|
methodcaller_reduce(methodcallerobject *mc)
|
|
{
|
|
PyObject *newargs;
|
|
if (!mc->kwds || PyDict_Size(mc->kwds) == 0) {
|
|
Py_ssize_t i;
|
|
Py_ssize_t callargcount = PyTuple_GET_SIZE(mc->args);
|
|
newargs = PyTuple_New(1 + callargcount);
|
|
if (newargs == NULL)
|
|
return NULL;
|
|
Py_INCREF(mc->name);
|
|
PyTuple_SET_ITEM(newargs, 0, mc->name);
|
|
for (i = 0; i < callargcount; ++i) {
|
|
PyObject *arg = PyTuple_GET_ITEM(mc->args, i);
|
|
Py_INCREF(arg);
|
|
PyTuple_SET_ITEM(newargs, i + 1, arg);
|
|
}
|
|
return Py_BuildValue("ON", Py_TYPE(mc), newargs);
|
|
}
|
|
else {
|
|
PyObject *functools;
|
|
PyObject *partial;
|
|
PyObject *constructor;
|
|
_Py_IDENTIFIER(partial);
|
|
functools = PyImport_ImportModule("functools");
|
|
if (!functools)
|
|
return NULL;
|
|
partial = _PyObject_GetAttrId(functools, &PyId_partial);
|
|
Py_DECREF(functools);
|
|
if (!partial)
|
|
return NULL;
|
|
newargs = PyTuple_New(2);
|
|
if (newargs == NULL) {
|
|
Py_DECREF(partial);
|
|
return NULL;
|
|
}
|
|
Py_INCREF(Py_TYPE(mc));
|
|
PyTuple_SET_ITEM(newargs, 0, (PyObject *)Py_TYPE(mc));
|
|
Py_INCREF(mc->name);
|
|
PyTuple_SET_ITEM(newargs, 1, mc->name);
|
|
constructor = PyObject_Call(partial, newargs, mc->kwds);
|
|
Py_DECREF(newargs);
|
|
Py_DECREF(partial);
|
|
return Py_BuildValue("NO", constructor, mc->args);
|
|
}
|
|
}
|
|
|
|
static PyMethodDef methodcaller_methods[] = {
|
|
{"__reduce__", (PyCFunction)methodcaller_reduce, METH_NOARGS,
|
|
reduce_doc},
|
|
{NULL}
|
|
};
|
|
PyDoc_STRVAR(methodcaller_doc,
|
|
"methodcaller(name, ...) --> methodcaller object\n\
|
|
\n\
|
|
Return a callable object that calls the given method on its operand.\n\
|
|
After f = methodcaller('name'), the call f(r) returns r.name().\n\
|
|
After g = methodcaller('name', 'date', foo=1), the call g(r) returns\n\
|
|
r.name('date', foo=1).");
|
|
|
|
static PyTypeObject methodcaller_type = {
|
|
PyVarObject_HEAD_INIT(NULL, 0)
|
|
"operator.methodcaller", /* tp_name */
|
|
sizeof(methodcallerobject), /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
/* methods */
|
|
(destructor)methodcaller_dealloc, /* tp_dealloc */
|
|
0, /* tp_print */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* tp_reserved */
|
|
(reprfunc)methodcaller_repr, /* tp_repr */
|
|
0, /* tp_as_number */
|
|
0, /* tp_as_sequence */
|
|
0, /* tp_as_mapping */
|
|
0, /* tp_hash */
|
|
(ternaryfunc)methodcaller_call, /* tp_call */
|
|
0, /* tp_str */
|
|
PyObject_GenericGetAttr, /* tp_getattro */
|
|
0, /* tp_setattro */
|
|
0, /* tp_as_buffer */
|
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */
|
|
methodcaller_doc, /* tp_doc */
|
|
(traverseproc)methodcaller_traverse, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
0, /* tp_iter */
|
|
0, /* tp_iternext */
|
|
methodcaller_methods, /* tp_methods */
|
|
0, /* tp_members */
|
|
0, /* tp_getset */
|
|
0, /* tp_base */
|
|
0, /* tp_dict */
|
|
0, /* tp_descr_get */
|
|
0, /* tp_descr_set */
|
|
0, /* tp_dictoffset */
|
|
0, /* tp_init */
|
|
0, /* tp_alloc */
|
|
methodcaller_new, /* tp_new */
|
|
0, /* tp_free */
|
|
};
|
|
|
|
|
|
/* Initialization function for the module (*must* be called PyInit__operator) */
|
|
|
|
|
|
static struct PyModuleDef operatormodule = {
|
|
PyModuleDef_HEAD_INIT,
|
|
"_operator",
|
|
operator_doc,
|
|
-1,
|
|
operator_methods,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
PyMODINIT_FUNC
|
|
PyInit__operator(void)
|
|
{
|
|
PyObject *m;
|
|
|
|
/* Create the module and add the functions */
|
|
m = PyModule_Create(&operatormodule);
|
|
if (m == NULL)
|
|
return NULL;
|
|
|
|
if (PyType_Ready(&itemgetter_type) < 0)
|
|
return NULL;
|
|
Py_INCREF(&itemgetter_type);
|
|
PyModule_AddObject(m, "itemgetter", (PyObject *)&itemgetter_type);
|
|
|
|
if (PyType_Ready(&attrgetter_type) < 0)
|
|
return NULL;
|
|
Py_INCREF(&attrgetter_type);
|
|
PyModule_AddObject(m, "attrgetter", (PyObject *)&attrgetter_type);
|
|
|
|
if (PyType_Ready(&methodcaller_type) < 0)
|
|
return NULL;
|
|
Py_INCREF(&methodcaller_type);
|
|
PyModule_AddObject(m, "methodcaller", (PyObject *)&methodcaller_type);
|
|
return m;
|
|
}
|