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authorGuido van Rossum <guido@python.org>2002-04-03 23:01:45 (GMT)
committerGuido van Rossum <guido@python.org>2002-04-03 23:01:45 (GMT)
commit5f8203679d113b3963180da6380ebd69f9f8cd44 (patch)
tree6503c8c00305804576fa9817599e832c822bf328 /Objects/boolobject.c
parent3a52ff6df4ad48114c73a5b899da59fd78e4eda7 (diff)
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Oops. Here are the new files. My apologies.
Diffstat (limited to 'Objects/boolobject.c')
-rw-r--r--Objects/boolobject.c212
1 files changed, 212 insertions, 0 deletions
diff --git a/Objects/boolobject.c b/Objects/boolobject.c
new file mode 100644
index 0000000..fc5c4ca
--- /dev/null
+++ b/Objects/boolobject.c
@@ -0,0 +1,212 @@
+/* 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)
+{
+ if (flags & Py_PRINT_RAW) {
+ if (self->ob_ival == 0)
+ fputs("False", fp);
+ else
+ fputs("True", fp);
+ }
+ else {
+ if (self->ob_ival == 0)
+ fputs("False", fp);
+ else
+ fputs("True", fp);
+ }
+ return 0;
+}
+
+/* We define bool_repr to return "False" or "True" */
+
+static PyObject *false_str = NULL;
+static PyObject *true_str = NULL;
+
+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 */
+
+PyObject *
+bool_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+{
+ static char *kwlist[] = {"x", 0};
+ PyObject *x;
+ 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 */
+
+static char 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
+};