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cpython/Objects/cellobject.c at 2.7 · python-emscripten/cpython · GitHub
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cellobject.c
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145 lines (129 loc) · 3.97 KB
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Objects
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cellobject.c
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/* Cell object implementation */
#include
"Python.h"
PyObject
*
PyCell_New
(
PyObject
*
obj
)
{
PyCellObject
*
op
;
op
=
(
PyCellObject
*
)
PyObject_GC_New
(
PyCellObject
,
&
PyCell_Type
);
if
(
op
==
NULL
)
return
NULL
;
op
->
ob_ref
=
obj
;
Py_XINCREF
(
obj
);
_PyObject_GC_TRACK
(
op
);
return
(
PyObject
*
)
op
;
}
PyObject
*
PyCell_Get
(
PyObject
*
op
)
{
if
(!
PyCell_Check
(
op
)) {
PyErr_BadInternalCall
();
return
NULL
;
}
Py_XINCREF
(((
PyCellObject
*
)
op
)
->
ob_ref
);
return
PyCell_GET
(
op
);
}
int
PyCell_Set
(
PyObject
*
op
,
PyObject
*
obj
)
{
PyObject
*
oldobj
;
if
(!
PyCell_Check
(
op
)) {
PyErr_BadInternalCall
();
return
-1
;
}
oldobj
=
PyCell_GET
(
op
);
Py_XINCREF
(
obj
);
PyCell_SET
(
op
,
obj
);
Py_XDECREF
(
oldobj
);
return
0
;
}
static
void
cell_dealloc
(
PyCellObject
*
op
)
{
_PyObject_GC_UNTRACK
(
op
);
Py_XDECREF
(
op
->
ob_ref
);
PyObject_GC_Del
(
op
);
}
static
int
cell_compare
(
PyCellObject
*
a
,
PyCellObject
*
b
)
{
/* Py3K warning for comparisons */
if
(
PyErr_WarnPy3k
(
"cell comparisons not supported in 3.x"
,
1
)
<
0
) {
return
-2
;
}
if
(
a
->
ob_ref
==
NULL
) {
if
(
b
->
ob_ref
==
NULL
)
return
0
;
return
-1
;
}
else
if
(
b
->
ob_ref
==
NULL
)
return
1
;
return
PyObject_Compare
(
a
->
ob_ref
,
b
->
ob_ref
);
}
static
PyObject
*
cell_repr
(
PyCellObject
*
op
)
{
if
(
op
->
ob_ref
==
NULL
)
return
PyString_FromFormat
(
"<cell at %p: empty>"
,
op
);
return
PyString_FromFormat
(
"<cell at %p: %.80s object at %p>"
,
op
,
op
->
ob_ref
->
ob_type
->
tp_name
,
op
->
ob_ref
);
}
static
int
cell_traverse
(
PyCellObject
*
op
,
visitproc
visit
,
void
*
arg
)
{
Py_VISIT
(
op
->
ob_ref
);
return
0
;
}
static
int
cell_clear
(
PyCellObject
*
op
)
{
Py_CLEAR
(
op
->
ob_ref
);
return
0
;
}
static
PyObject
*
cell_get_contents
(
PyCellObject
*
op
,
void
*
closure
)
{
if
(
op
->
ob_ref
==
NULL
)
{
PyErr_SetString
(
PyExc_ValueError
,
"Cell is empty"
);
return
NULL
;
}
Py_INCREF
(
op
->
ob_ref
);
return
op
->
ob_ref
;
}
static
PyGetSetDef
cell_getsetlist
[]
=
{
{
"cell_contents"
, (
getter
)
cell_get_contents
,
NULL
},
{
NULL
}
/* sentinel */
};
PyTypeObject
PyCell_Type
=
{
PyVarObject_HEAD_INIT
(
&
PyType_Type
,
0
)
"cell"
,
sizeof
(
PyCellObject
),
0
,
(
destructor
)
cell_dealloc
,
/* tp_dealloc */
0
,
/* tp_print */
0
,
/* tp_getattr */
0
,
/* tp_setattr */
(
cmpfunc
)
cell_compare
,
/* tp_compare */
(
reprfunc
)
cell_repr
,
/* tp_repr */
0
,
/* tp_as_number */
0
,
/* tp_as_sequence */
0
,
/* tp_as_mapping */
0
,
/* tp_hash */
0
,
/* 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 */
0
,
/* tp_doc */
(
traverseproc
)
cell_traverse
,
/* tp_traverse */
(
inquiry
)
cell_clear
,
/* tp_clear */
0
,
/* tp_richcompare */
0
,
/* tp_weaklistoffset */
0
,
/* tp_iter */
0
,
/* tp_iternext */
0
,
/* tp_methods */
0
,
/* tp_members */
cell_getsetlist
,
/* tp_getset */
};
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