python/Modules/operator.c at master · charleson/python · GitHub

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#include "Python.h"

PyDoc_STRVAR(operator_doc,

"Operator interface.\n\

\n\

This module exports a set of functions implemented in C corresponding\n\

to the intrinsic operators of Python. For example, operator.add(x, y)\n\

is equivalent to the expression x+y. The function names are those\n\

used for special class methods; variants without leading and trailing\n\

'__' are also provided for convenience.");

#define spam1(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a1) { \

return AOP(a1); }

#define spam2(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \

PyObject *a1, *a2; \

if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \

return AOP(a1,a2); }

#define spamoi(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \

PyObject *a1; int a2; \

if(! PyArg_ParseTuple(a,"Oi:" #OP,&a1,&a2)) return NULL; \

return AOP(a1,a2); }

#define spam2n(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \

PyObject *a1, *a2; \

if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \

if(-1 == AOP(a1,a2)) return NULL; \

Py_INCREF(Py_None); \

return Py_None; }

#define spam3n(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \

PyObject *a1, *a2, *a3; \

if(! PyArg_UnpackTuple(a,#OP,3,3,&a1,&a2,&a3)) return NULL; \

if(-1 == AOP(a1,a2,a3)) return NULL; \

Py_INCREF(Py_None); \

return Py_None; }

#define spami(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a1) { \

long r; \

if(-1 == (r=AOP(a1))) return NULL; \

return PyBool_FromLong(r); }

#define spami2(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \

PyObject *a1, *a2; long r; \

if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \

if(-1 == (r=AOP(a1,a2))) return NULL; \

return PyInt_FromLong(r); }

#define spamn2(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \

PyObject *a1, *a2; Py_ssize_t r; \

if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \

if(-1 == (r=AOP(a1,a2))) return NULL; \

return PyInt_FromSsize_t(r); }

#define spami2b(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \

PyObject *a1, *a2; long r; \

if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \

if(-1 == (r=AOP(a1,a2))) return NULL; \

return PyBool_FromLong(r); }

#define spamrc(OP,A) static PyObject *OP(PyObject *s, PyObject *a) { \

PyObject *a1, *a2; \

if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \

return PyObject_RichCompare(a1,a2,A); }

spami(isCallable , PyCallable_Check)

spami(isNumberType , PyNumber_Check)

spami(truth , PyObject_IsTrue)

spam2(op_add , PyNumber_Add)

spam2(op_sub , PyNumber_Subtract)

spam2(op_mul , PyNumber_Multiply)

spam2(op_div , PyNumber_Divide)

spam2(op_floordiv , PyNumber_FloorDivide)

spam2(op_truediv , PyNumber_TrueDivide)

spam2(op_mod , PyNumber_Remainder)

spam1(op_neg , PyNumber_Negative)

spam1(op_pos , PyNumber_Positive)

spam1(op_abs , PyNumber_Absolute)

spam1(op_inv , PyNumber_Invert)

spam1(op_invert , PyNumber_Invert)

spam2(op_lshift , PyNumber_Lshift)

spam2(op_rshift , PyNumber_Rshift)

spami(op_not_ , PyObject_Not)

spam2(op_and_ , PyNumber_And)

spam2(op_xor , PyNumber_Xor)

spam2(op_or_ , PyNumber_Or)

spam2(op_iadd , PyNumber_InPlaceAdd)

spam2(op_isub , PyNumber_InPlaceSubtract)

spam2(op_imul , PyNumber_InPlaceMultiply)

spam2(op_idiv , PyNumber_InPlaceDivide)

spam2(op_ifloordiv , PyNumber_InPlaceFloorDivide)

spam2(op_itruediv , PyNumber_InPlaceTrueDivide)

spam2(op_imod , PyNumber_InPlaceRemainder)

spam2(op_ilshift , PyNumber_InPlaceLshift)

spam2(op_irshift , PyNumber_InPlaceRshift)

spam2(op_iand , PyNumber_InPlaceAnd)

spam2(op_ixor , PyNumber_InPlaceXor)

spam2(op_ior , PyNumber_InPlaceOr)

spami(isSequenceType , PySequence_Check)

spam2(op_concat , PySequence_Concat)

spamoi(op_repeat , PySequence_Repeat)

spam2(op_iconcat , PySequence_InPlaceConcat)

spamoi(op_irepeat , PySequence_InPlaceRepeat)

spami2b(op_contains , PySequence_Contains)

spami2b(sequenceIncludes, PySequence_Contains)

spamn2(indexOf , PySequence_Index)

spamn2(countOf , PySequence_Count)

spami(isMappingType , PyMapping_Check)

spam2(op_getitem , PyObject_GetItem)

spam2n(op_delitem , PyObject_DelItem)

spam3n(op_setitem , PyObject_SetItem)

spamrc(op_lt , Py_LT)

spamrc(op_le , Py_LE)

spamrc(op_eq , Py_EQ)

spamrc(op_ne , Py_NE)

spamrc(op_gt , Py_GT)

spamrc(op_ge , Py_GE)

static PyObject*

op_pow(PyObject *s, PyObject *a)

{

PyObject *a1, *a2;

if (PyArg_UnpackTuple(a,"pow", 2, 2, &a1, &a2))

return PyNumber_Power(a1, a2, Py_None);

return NULL;

}

static PyObject*

op_ipow(PyObject *s, PyObject *a)

{

PyObject *a1, *a2;

if (PyArg_UnpackTuple(a,"ipow", 2, 2, &a1, &a2))

return PyNumber_InPlacePower(a1, a2, Py_None);

return NULL;

}

static PyObject *

op_index(PyObject *s, PyObject *a)

{

return PyNumber_Index(a);

}

static PyObject*

is_(PyObject *s, PyObject *a)

{

PyObject *a1, *a2, *result = NULL;

if (PyArg_UnpackTuple(a,"is_", 2, 2, &a1, &a2)) {

result = (a1 == a2) ? Py_True : Py_False;

Py_INCREF(result);

}

return result;

}

static PyObject*

is_not(PyObject *s, PyObject *a)

{

PyObject *a1, *a2, *result = NULL;

if (PyArg_UnpackTuple(a,"is_not", 2, 2, &a1, &a2)) {

result = (a1 != a2) ? Py_True : Py_False;

Py_INCREF(result);

}

return result;

}

static PyObject*

op_getslice(PyObject *s, PyObject *a)

{

PyObject *a1;

Py_ssize_t a2, a3;

if (!PyArg_ParseTuple(a, "Onn:getslice", &a1, &a2, &a3))

return NULL;

return PySequence_GetSlice(a1, a2, a3);

}

static PyObject*

op_setslice(PyObject *s, PyObject *a)

{

PyObject *a1, *a4;

Py_ssize_t a2, a3;

if (!PyArg_ParseTuple(a, "OnnO:setslice", &a1, &a2, &a3, &a4))

return NULL;

if (-1 == PySequence_SetSlice(a1, a2, a3, a4))

return NULL;

Py_RETURN_NONE;

}

static PyObject*

op_delslice(PyObject *s, PyObject *a)

{

PyObject *a1;

Py_ssize_t a2, a3;

if (!PyArg_ParseTuple(a, "Onn:delslice", &a1, &a2, &a3))

return NULL;

if (-1 == PySequence_DelSlice(a1, a2, a3))

return NULL;

Py_RETURN_NONE;

}

#undef spam1

#undef spam2

#undef spam1o

#define spam1(OP,DOC) {#OP, OP, METH_VARARGS, PyDoc_STR(DOC)},

#define spam2(OP,ALTOP,DOC) {#OP, op_##OP, METH_VARARGS, PyDoc_STR(DOC)}, \

{#ALTOP, op_##OP, METH_VARARGS, PyDoc_STR(DOC)},

#define spam1o(OP,DOC) {#OP, OP, METH_O, PyDoc_STR(DOC)},

#define spam2o(OP,ALTOP,DOC) {#OP, op_##OP, METH_O, PyDoc_STR(DOC)}, \

{#ALTOP, op_##OP, METH_O, PyDoc_STR(DOC)},

static struct PyMethodDef operator_methods[] = {

spam1o(isCallable,

"isCallable(a) -- Same as callable(a).")

spam1o(isNumberType,

"isNumberType(a) -- Return True if a has a numeric type, False otherwise.")

spam1o(isSequenceType,

"isSequenceType(a) -- Return True if a has a sequence type, False otherwise.")

spam1o(truth,

"truth(a) -- Return True if a is true, False otherwise.")

spam2(contains,__contains__,

"contains(a, b) -- Same as b in a (note reversed operands).")

spam1(sequenceIncludes,

"sequenceIncludes(a, b) -- Same as b in a (note reversed operands; deprecated).")

spam1(indexOf,

"indexOf(a, b) -- Return the first index of b in a.")

spam1(countOf,

"countOf(a, b) -- Return the number of times b occurs in a.")

spam1o(isMappingType,

"isMappingType(a) -- Return True if a has a mapping type, False otherwise.")

spam1(is_, "is_(a, b) -- Same as a is b.")

spam1(is_not, "is_not(a, b) -- Same as a is not b.")

spam2o(index, __index__, "index(a) -- Same as a.__index__()")

spam2(add,__add__, "add(a, b) -- Same as a + b.")

spam2(sub,__sub__, "sub(a, b) -- Same as a - b.")

spam2(mul,__mul__, "mul(a, b) -- Same as a * b.")

spam2(div,__div__, "div(a, b) -- Same as a / b when __future__.division is not in effect.")

spam2(floordiv,__floordiv__, "floordiv(a, b) -- Same as a // b.")

spam2(truediv,__truediv__, "truediv(a, b) -- Same as a / b when __future__.division is in effect.")

spam2(mod,__mod__, "mod(a, b) -- Same as a % b.")

spam2o(neg,__neg__, "neg(a) -- Same as -a.")

spam2o(pos,__pos__, "pos(a) -- Same as +a.")

spam2o(abs,__abs__, "abs(a) -- Same as abs(a).")

spam2o(inv,__inv__, "inv(a) -- Same as ~a.")

spam2o(invert,__invert__, "invert(a) -- Same as ~a.")

spam2(lshift,__lshift__, "lshift(a, b) -- Same as a << b.")

spam2(rshift,__rshift__, "rshift(a, b) -- Same as a >> b.")

spam2o(not_,__not__, "not_(a) -- Same as not a.")

spam2(and_,__and__, "and_(a, b) -- Same as a & b.")

spam2(xor,__xor__, "xor(a, b) -- Same as a ^ b.")

spam2(or_,__or__, "or_(a, b) -- Same as a | b.")

spam2(iadd,__iadd__, "iadd(a, b) -- Same as a += b.")

spam2(isub,__isub__, "isub(a, b) -- Same as a -= b.")

spam2(imul,__imul__, "imul(a, b) -- Same as a *= b.")

spam2(idiv,__idiv__, "idiv(a, b) -- Same as a /= b when __future__.division is not in effect.")

spam2(ifloordiv,__ifloordiv__, "ifloordiv(a, b) -- Same as a //= b.")

spam2(itruediv,__itruediv__, "itruediv(a, b) -- Same as a /= b when __future__.division is in effect.")

spam2(imod,__imod__, "imod(a, b) -- Same as a %= b.")

spam2(ilshift,__ilshift__, "ilshift(a, b) -- Same as a <<= b.")

spam2(irshift,__irshift__, "irshift(a, b) -- Same as a >>= b.")

spam2(iand,__iand__, "iand(a, b) -- Same as a &= b.")

spam2(ixor,__ixor__, "ixor(a, b) -- Same as a ^= b.")

spam2(ior,__ior__, "ior(a, b) -- Same as a |= b.")

spam2(concat,__concat__,

"concat(a, b) -- Same as a + b, for a and b sequences.")

spam2(repeat,__repeat__,

"repeat(a, b) -- Return a * b, where a is a sequence, and b is an integer.")

spam2(iconcat,__iconcat__,

"iconcat(a, b) -- Same as a += b, for a and b sequences.")

spam2(irepeat,__irepeat__,

"irepeat(a, b) -- Same as a *= b, where a is a sequence, and b is an integer.")

spam2(getitem,__getitem__,

"getitem(a, b) -- Same as a[b].")

spam2(setitem,__setitem__,

"setitem(a, b, c) -- Same as a[b] = c.")

spam2(delitem,__delitem__,

"delitem(a, b) -- Same as del a[b].")

spam2(pow,__pow__, "pow(a, b) -- Same as a ** b.")

spam2(ipow,__ipow__, "ipow(a, b) -- Same as a **= b.")

spam2(getslice,__getslice__,

"getslice(a, b, c) -- Same as a[b:c].")

spam2(setslice,__setslice__,

"setslice(a, b, c, d) -- Same as a[b:c] = d.")

spam2(delslice,__delslice__,

"delslice(a, b, c) -- Same as del a[b:c].")

spam2(lt,__lt__, "lt(a, b) -- Same as a<b.")

spam2(le,__le__, "le(a, b) -- Same as a<=b.")

spam2(eq,__eq__, "eq(a, b) -- Same as a==b.")

spam2(ne,__ne__, "ne(a, b) -- Same as a!=b.")

spam2(gt,__gt__, "gt(a, b) -- Same as a>b.")

spam2(ge,__ge__, "ge(a, b) -- Same as a>=b.")

{NULL, NULL} /* sentinel */

};

/* itemgetter object **********************************************************/

typedef struct {

PyObject_HEAD

Py_ssize_t nitems;

PyObject *item;

} itemgetterobject;

static PyTypeObject itemgetter_type;

static PyObject *

itemgetter_new(PyTypeObject *type, PyObject *args, PyObject *kwds)

{

itemgetterobject *ig;

PyObject *item;

Py_ssize_t nitems;

if (!_PyArg_NoKeywords("itemgetter()", kwds))

return NULL;

nitems = PyTuple_GET_SIZE(args);

if (nitems <= 1) {

if (!PyArg_UnpackTuple(args, "itemgetter", 1, 1, &item))

return NULL;

} else

item = args;

/* create itemgetterobject structure */

ig = PyObject_GC_New(itemgetterobject, &itemgetter_type);

if (ig == NULL)

return NULL;

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 (!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;

}

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_compare */

0, /* 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 */

0, /* 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;

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;

} else

attr = args;

/* create attrgetterobject structure */

ag = PyObject_GC_New(attrgetterobject, &attrgetter_type);

if (ag == NULL)

return NULL;

Py_INCREF(attr);

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)

{

char *s, *p;

#ifdef Py_USING_UNICODE

if (PyUnicode_Check(attr)) {

attr = _PyUnicode_AsDefaultEncodedString(attr, NULL);

if (attr == NULL)

return NULL;

}

#endif

if (!PyString_Check(attr)) {

PyErr_SetString(PyExc_TypeError,

"attribute name must be a string");

return NULL;

}

s = PyString_AS_STRING(attr);

Py_INCREF(obj);

for (;;) {

PyObject *newobj, *str;

p = strchr(s, '.');

str = p ? PyString_FromStringAndSize(s, (p-s)) :

PyString_FromString(s);

if (str == NULL) {

Py_DECREF(obj);

return NULL;

}

newobj = PyObject_GetAttr(obj, str);

Py_DECREF(str);

Py_DECREF(obj);

if (newobj == NULL)

return NULL;

obj = newobj;

if (p == NULL) break;

s = p+1;

}

return obj;

}

static PyObject *

attrgetter_call(attrgetterobject *ag, PyObject *args, PyObject *kw)

{

PyObject *obj, *result;

Py_ssize_t i, nattrs=ag->nattrs;

if (!PyArg_UnpackTuple(args, "attrgetter", 1, 1, &obj))

return NULL;

if (ag->nattrs == 1)

return dotted_getattr(obj, ag->attr);

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;

}

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_compare */

0, /* 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 */

0, /* 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, *newargs;

if (PyTuple_GET_SIZE(args) < 1) {

PyErr_SetString(PyExc_TypeError, "methodcaller needs at least "

"one argument, the method name");

return NULL;

}

/* create methodcallerobject structure */

mc = PyObject_GC_New(methodcallerobject, &methodcaller_type);

if (mc == NULL)

return NULL;

newargs = PyTuple_GetSlice(args, 1, PyTuple_GET_SIZE(args));

if (newargs == NULL) {

Py_DECREF(mc);

return NULL;

}

mc->args = newargs;

name = PyTuple_GET_ITEM(args, 0);

Py_INCREF(name);

mc->name = name;

Py_XINCREF(kwds);

mc->kwds = kwds;

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 (!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;

}

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_compare */

0, /* 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 */

0, /* 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 initoperator) */

PyMODINIT_FUNC

initoperator(void)

{

PyObject *m;

/* Create the module and add the functions */

m = Py_InitModule4("operator", operator_methods, operator_doc,

(PyObject*)NULL, PYTHON_API_VERSION);

if (m == NULL)

return;

if (PyType_Ready(&itemgetter_type) < 0)

return;

Py_INCREF(&itemgetter_type);

PyModule_AddObject(m, "itemgetter", (PyObject *)&itemgetter_type);

if (PyType_Ready(&attrgetter_type) < 0)

return;

Py_INCREF(&attrgetter_type);

PyModule_AddObject(m, "attrgetter", (PyObject *)&attrgetter_type);

if (PyType_Ready(&methodcaller_type) < 0)

return;

Py_INCREF(&methodcaller_type);

PyModule_AddObject(m, "methodcaller", (PyObject *)&methodcaller_type);

}

python/Modules/operator.c at master · charleson/python · GitHub

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