Showing the changes to sys/src/cmd/python/Objects/boolobject.c (1 of 3706 files). Show all
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| 1 | +/* Boolean type, a subtype of int */ | |
| 2 | + | |
| 3 | +#include "Python.h" | |
| 4 | + | |
| 5 | +/* We need to define bool_print to override int_print */ | |
| 6 | + | |
| 7 | +static int | |
| 8 | +bool_print(PyBoolObject *self, FILE *fp, int flags) | |
| 9 | +{ | |
| 10 | + fputs(self->ob_ival == 0 ? "False" : "True", fp); | |
| 11 | + return 0; | |
| 12 | +} | |
| 13 | + | |
| 14 | +/* We define bool_repr to return "False" or "True" */ | |
| 15 | + | |
| 16 | +static PyObject *false_str = NULL; | |
| 17 | +static PyObject *true_str = NULL; | |
| 18 | + | |
| 19 | +static PyObject * | |
| 20 | +bool_repr(PyBoolObject *self) | |
| 21 | +{ | |
| 22 | + PyObject *s; | |
| 23 | + | |
| 24 | + if (self->ob_ival) | |
| 25 | + s = true_str ? true_str : | |
| 26 | + (true_str = PyString_InternFromString("True")); | |
| 27 | + else | |
| 28 | + s = false_str ? false_str : | |
| 29 | + (false_str = PyString_InternFromString("False")); | |
| 30 | + Py_XINCREF(s); | |
| 31 | + return s; | |
| 32 | +} | |
| 33 | + | |
| 34 | +/* Function to return a bool from a C long */ | |
| 35 | + | |
| 36 | +PyObject *PyBool_FromLong(long ok) | |
| 37 | +{ | |
| 38 | + PyObject *result; | |
| 39 | + | |
| 40 | + if (ok) | |
| 41 | + result = Py_True; | |
| 42 | + else | |
| 43 | + result = Py_False; | |
| 44 | + Py_INCREF(result); | |
| 45 | + return result; | |
| 46 | +} | |
| 47 | + | |
| 48 | +/* We define bool_new to always return either Py_True or Py_False */ | |
| 49 | + | |
| 50 | +static PyObject * | |
| 51 | +bool_new(PyTypeObject *type, PyObject *args, PyObject *kwds) | |
| 52 | +{ | |
| 53 | + static char *kwlist[] = {"x", 0}; | |
| 54 | + PyObject *x = Py_False; | |
| 55 | + long ok; | |
| 56 | + | |
| 57 | + if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:bool", kwlist, &x)) | |
| 58 | + return NULL; | |
| 59 | + ok = PyObject_IsTrue(x); | |
| 60 | + if (ok < 0) | |
| 61 | + return NULL; | |
| 62 | + return PyBool_FromLong(ok); | |
| 63 | +} | |
| 64 | + | |
| 65 | +/* Arithmetic operations redefined to return bool if both args are bool. */ | |
| 66 | + | |
| 67 | +static PyObject * | |
| 68 | +bool_and(PyObject *a, PyObject *b) | |
| 69 | +{ | |
| 70 | + if (!PyBool_Check(a) || !PyBool_Check(b)) | |
| 71 | + return PyInt_Type.tp_as_number->nb_and(a, b); | |
| 72 | + return PyBool_FromLong( | |
| 73 | + ((PyBoolObject *)a)->ob_ival & ((PyBoolObject *)b)->ob_ival); | |
| 74 | +} | |
| 75 | + | |
| 76 | +static PyObject * | |
| 77 | +bool_or(PyObject *a, PyObject *b) | |
| 78 | +{ | |
| 79 | + if (!PyBool_Check(a) || !PyBool_Check(b)) | |
| 80 | + return PyInt_Type.tp_as_number->nb_or(a, b); | |
| 81 | + return PyBool_FromLong( | |
| 82 | + ((PyBoolObject *)a)->ob_ival | ((PyBoolObject *)b)->ob_ival); | |
| 83 | +} | |
| 84 | + | |
| 85 | +static PyObject * | |
| 86 | +bool_xor(PyObject *a, PyObject *b) | |
| 87 | +{ | |
| 88 | + if (!PyBool_Check(a) || !PyBool_Check(b)) | |
| 89 | + return PyInt_Type.tp_as_number->nb_xor(a, b); | |
| 90 | + return PyBool_FromLong( | |
| 91 | + ((PyBoolObject *)a)->ob_ival ^ ((PyBoolObject *)b)->ob_ival); | |
| 92 | +} | |
| 93 | + | |
| 94 | +/* Doc string */ | |
| 95 | + | |
| 96 | +PyDoc_STRVAR(bool_doc, | |
| 97 | +"bool(x) -> bool\n\ | |
| 98 | +\n\ | |
| 99 | +Returns True when the argument x is true, False otherwise.\n\ | |
| 100 | +The builtins True and False are the only two instances of the class bool.\n\ | |
| 101 | +The class bool is a subclass of the class int, and cannot be subclassed."); | |
| 102 | + | |
| 103 | +/* Arithmetic methods -- only so we can override &, |, ^. */ | |
| 104 | + | |
| 105 | +static PyNumberMethods bool_as_number = { | |
| 106 | + 0, /* nb_add */ | |
| 107 | + 0, /* nb_subtract */ | |
| 108 | + 0, /* nb_multiply */ | |
| 109 | + 0, /* nb_divide */ | |
| 110 | + 0, /* nb_remainder */ | |
| 111 | + 0, /* nb_divmod */ | |
| 112 | + 0, /* nb_power */ | |
| 113 | + 0, /* nb_negative */ | |
| 114 | + 0, /* nb_positive */ | |
| 115 | + 0, /* nb_absolute */ | |
| 116 | + 0, /* nb_nonzero */ | |
| 117 | + 0, /* nb_invert */ | |
| 118 | + 0, /* nb_lshift */ | |
| 119 | + 0, /* nb_rshift */ | |
| 120 | + bool_and, /* nb_and */ | |
| 121 | + bool_xor, /* nb_xor */ | |
| 122 | + bool_or, /* nb_or */ | |
| 123 | + 0, /* nb_coerce */ | |
| 124 | + 0, /* nb_int */ | |
| 125 | + 0, /* nb_long */ | |
| 126 | + 0, /* nb_float */ | |
| 127 | + 0, /* nb_oct */ | |
| 128 | + 0, /* nb_hex */ | |
| 129 | + 0, /* nb_inplace_add */ | |
| 130 | + 0, /* nb_inplace_subtract */ | |
| 131 | + 0, /* nb_inplace_multiply */ | |
| 132 | + 0, /* nb_inplace_divide */ | |
| 133 | + 0, /* nb_inplace_remainder */ | |
| 134 | + 0, /* nb_inplace_power */ | |
| 135 | + 0, /* nb_inplace_lshift */ | |
| 136 | + 0, /* nb_inplace_rshift */ | |
| 137 | + 0, /* nb_inplace_and */ | |
| 138 | + 0, /* nb_inplace_xor */ | |
| 139 | + 0, /* nb_inplace_or */ | |
| 140 | + 0, /* nb_floor_divide */ | |
| 141 | + 0, /* nb_true_divide */ | |
| 142 | + 0, /* nb_inplace_floor_divide */ | |
| 143 | + 0, /* nb_inplace_true_divide */ | |
| 144 | +}; | |
| 145 | + | |
| 146 | +/* The type object for bool. Note that this cannot be subclassed! */ | |
| 147 | + | |
| 148 | +PyTypeObject PyBool_Type = { | |
| 149 | + PyObject_HEAD_INIT(&PyType_Type) | |
| 150 | + 0, | |
| 151 | + "bool", | |
| 152 | + sizeof(PyIntObject), | |
| 153 | + 0, | |
| 154 | + 0, /* tp_dealloc */ | |
| 155 | + (printfunc)bool_print, /* tp_print */ | |
| 156 | + 0, /* tp_getattr */ | |
| 157 | + 0, /* tp_setattr */ | |
| 158 | + 0, /* tp_compare */ | |
| 159 | + (reprfunc)bool_repr, /* tp_repr */ | |
| 160 | + &bool_as_number, /* tp_as_number */ | |
| 161 | + 0, /* tp_as_sequence */ | |
| 162 | + 0, /* tp_as_mapping */ | |
| 163 | + 0, /* tp_hash */ | |
| 164 | + 0, /* tp_call */ | |
| 165 | + (reprfunc)bool_repr, /* tp_str */ | |
| 166 | + 0, /* tp_getattro */ | |
| 167 | + 0, /* tp_setattro */ | |
| 168 | + 0, /* tp_as_buffer */ | |
| 169 | + Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES, /* tp_flags */ | |
| 170 | + bool_doc, /* tp_doc */ | |
| 171 | + 0, /* tp_traverse */ | |
| 172 | + 0, /* tp_clear */ | |
| 173 | + 0, /* tp_richcompare */ | |
| 174 | + 0, /* tp_weaklistoffset */ | |
| 175 | + 0, /* tp_iter */ | |
| 176 | + 0, /* tp_iternext */ | |
| 177 | + 0, /* tp_methods */ | |
| 178 | + 0, /* tp_members */ | |
| 179 | + 0, /* tp_getset */ | |
| 180 | + &PyInt_Type, /* tp_base */ | |
| 181 | + 0, /* tp_dict */ | |
| 182 | + 0, /* tp_descr_get */ | |
| 183 | + 0, /* tp_descr_set */ | |
| 184 | + 0, /* tp_dictoffset */ | |
| 185 | + 0, /* tp_init */ | |
| 186 | + 0, /* tp_alloc */ | |
| 187 | + bool_new, /* tp_new */ | |
| 188 | +}; | |
| 189 | + | |
| 190 | +/* The objects representing bool values False and True */ | |
| 191 | + | |
| 192 | +/* Named Zero for link-level compatibility */ | |
| 193 | +PyIntObject _Py_ZeroStruct = { | |
| 194 | + PyObject_HEAD_INIT(&PyBool_Type) | |
| 195 | + 0 | |
| 196 | +}; | |
| 197 | + | |
| 198 | +PyIntObject _Py_TrueStruct = { | |
| 199 | + PyObject_HEAD_INIT(&PyBool_Type) | |
| 200 | + 1 | |
| 201 | +}; | |