Staging
v0.5.1
v0.5.1
https://github.com/python/cpython
Revision 31352c5a304cef1d972aba6e6ec61e89dcadde21 authored by Andrew M. Kuchling on 29 June 2004, 13:17:29 UTC, committed by Andrew M. Kuchling on 29 June 2004, 13:17:29 UTC
1 parent bd3200f
Tip revision: 31352c5a304cef1d972aba6e6ec61e89dcadde21 authored by Andrew M. Kuchling on 29 June 2004, 13:17:29 UTC
Remove unused import. (If it's there for some deep, dark reason, it should have been commented.)
Remove unused import. (If it's there for some deep, dark reason, it should have been commented.)
Tip revision: 31352c5
boolobject.c
/* Boolean type, a subtype of int */
#include "Python.h"
/* We need to define bool_print to override int_print */
static int
bool_print(PyBoolObject *self, FILE *fp, int flags)
{
fputs(self->ob_ival == 0 ? "False" : "True", fp);
return 0;
}
/* We define bool_repr to return "False" or "True" */
static PyObject *false_str = NULL;
static PyObject *true_str = NULL;
static PyObject *
bool_repr(PyBoolObject *self)
{
PyObject *s;
if (self->ob_ival)
s = true_str ? true_str :
(true_str = PyString_InternFromString("True"));
else
s = false_str ? false_str :
(false_str = PyString_InternFromString("False"));
Py_XINCREF(s);
return s;
}
/* Function to return a bool from a C long */
PyObject *PyBool_FromLong(long ok)
{
PyObject *result;
if (ok)
result = Py_True;
else
result = Py_False;
Py_INCREF(result);
return result;
}
/* We define bool_new to always return either Py_True or Py_False */
static PyObject *
bool_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
static char *kwlist[] = {"x", 0};
PyObject *x = Py_False;
long ok;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:bool", kwlist, &x))
return NULL;
ok = PyObject_IsTrue(x);
if (ok < 0)
return NULL;
return PyBool_FromLong(ok);
}
/* Arithmetic operations redefined to return bool if both args are bool. */
static PyObject *
bool_and(PyObject *a, PyObject *b)
{
if (!PyBool_Check(a) || !PyBool_Check(b))
return PyInt_Type.tp_as_number->nb_and(a, b);
return PyBool_FromLong(
((PyBoolObject *)a)->ob_ival & ((PyBoolObject *)b)->ob_ival);
}
static PyObject *
bool_or(PyObject *a, PyObject *b)
{
if (!PyBool_Check(a) || !PyBool_Check(b))
return PyInt_Type.tp_as_number->nb_or(a, b);
return PyBool_FromLong(
((PyBoolObject *)a)->ob_ival | ((PyBoolObject *)b)->ob_ival);
}
static PyObject *
bool_xor(PyObject *a, PyObject *b)
{
if (!PyBool_Check(a) || !PyBool_Check(b))
return PyInt_Type.tp_as_number->nb_xor(a, b);
return PyBool_FromLong(
((PyBoolObject *)a)->ob_ival ^ ((PyBoolObject *)b)->ob_ival);
}
/* Doc string */
PyDoc_STRVAR(bool_doc,
"bool(x) -> bool\n\
\n\
Returns True when the argument x is true, False otherwise.\n\
The builtins True and False are the only two instances of the class bool.\n\
The class bool is a subclass of the class int, and cannot be subclassed.");
/* Arithmetic methods -- only so we can override &, |, ^. */
static PyNumberMethods bool_as_number = {
0, /* nb_add */
0, /* nb_subtract */
0, /* nb_multiply */
0, /* nb_divide */
0, /* nb_remainder */
0, /* nb_divmod */
0, /* nb_power */
0, /* nb_negative */
0, /* nb_positive */
0, /* nb_absolute */
0, /* nb_nonzero */
0, /* nb_invert */
0, /* nb_lshift */
0, /* nb_rshift */
(binaryfunc)bool_and, /* nb_and */
(binaryfunc)bool_xor, /* nb_xor */
(binaryfunc)bool_or, /* nb_or */
0, /* nb_coerce */
0, /* nb_int */
0, /* nb_long */
0, /* nb_float */
0, /* nb_oct */
0, /* nb_hex */
0, /* nb_inplace_add */
0, /* nb_inplace_subtract */
0, /* nb_inplace_multiply */
0, /* nb_inplace_divide */
0, /* nb_inplace_remainder */
0, /* nb_inplace_power */
0, /* nb_inplace_lshift */
0, /* nb_inplace_rshift */
0, /* nb_inplace_and */
0, /* nb_inplace_xor */
0, /* nb_inplace_or */
0, /* nb_floor_divide */
0, /* nb_true_divide */
0, /* nb_inplace_floor_divide */
0, /* nb_inplace_true_divide */
};
/* The type object for bool. Note that this cannot be subclassed! */
PyTypeObject PyBool_Type = {
PyObject_HEAD_INIT(&PyType_Type)
0,
"bool",
sizeof(PyIntObject),
0,
0, /* tp_dealloc */
(printfunc)bool_print, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
(reprfunc)bool_repr, /* tp_repr */
&bool_as_number, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
(reprfunc)bool_repr, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES, /* tp_flags */
bool_doc, /* tp_doc */
0, /* 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 */
&PyInt_Type, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
0, /* tp_init */
0, /* tp_alloc */
bool_new, /* tp_new */
};
/* The objects representing bool values False and True */
/* Named Zero for link-level compatibility */
PyIntObject _Py_ZeroStruct = {
PyObject_HEAD_INIT(&PyBool_Type)
0
};
PyIntObject _Py_TrueStruct = {
PyObject_HEAD_INIT(&PyBool_Type)
1
};
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