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cpython/Objects/namespaceobject.c at v3.6.15 · python/cpython · GitHub
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// namespace object implementation
#include
"Python.h"
#include
"structmember.h"
typedef
struct
{
PyObject_HEAD
PyObject
*
ns_dict
;
}
_PyNamespaceObject
;
static
PyMemberDef
namespace_members
[]
=
{
{
"__dict__"
,
T_OBJECT
, offsetof(
_PyNamespaceObject
,
ns_dict
),
READONLY
},
{
NULL
}
};
// Methods
static
PyObject
*
namespace_new
(
PyTypeObject
*
type
,
PyObject
*
args
,
PyObject
*
kwds
)
{
PyObject
*
self
;
assert
(
type
!=
NULL
&&
type
->
tp_alloc
!=
NULL
);
self
=
type
->
tp_alloc
(
type
,
0
);
if
(
self
!=
NULL
) {
_PyNamespaceObject
*
ns
=
(
_PyNamespaceObject
*
)
self
;
ns
->
ns_dict
=
PyDict_New
();
if
(
ns
->
ns_dict
==
NULL
) {
Py_DECREF
(
ns
);
return
NULL
;
}
}
return
self
;
}
static
int
namespace_init
(
_PyNamespaceObject
*
ns
,
PyObject
*
args
,
PyObject
*
kwds
)
{
// ignore args if it's NULL or empty
if
(
args
!=
NULL
) {
Py_ssize_t
argcount
=
PyObject_Size
(
args
);
if
(
argcount
<
0
)
return
-1
;
else
if
(
argcount
>
0
) {
PyErr_Format
(
PyExc_TypeError
,
"no positional arguments expected"
);
return
-1
;
}
}
if
(
kwds
==
NULL
) {
return
0
;
}
if
(!
PyArg_ValidateKeywordArguments
(
kwds
)) {
return
-1
;
}
return
PyDict_Update
(
ns
->
ns_dict
,
kwds
);
}
static
void
namespace_dealloc
(
_PyNamespaceObject
*
ns
)
{
PyObject_GC_UnTrack
(
ns
);
Py_CLEAR
(
ns
->
ns_dict
);
Py_TYPE
(
ns
)
->
tp_free
((
PyObject
*
)
ns
);
}
static
PyObject
*
namespace_repr
(
PyObject
*
ns
)
{
int
i
,
loop_error
=
0
;
PyObject
*
pairs
=
NULL
,
*
d
=
NULL
,
*
keys
=
NULL
,
*
keys_iter
=
NULL
;
PyObject
*
key
;
PyObject
*
separator
,
*
pairsrepr
,
*
repr
=
NULL
;
const
char
*
name
;
name
=
(
Py_TYPE
(
ns
)
==
&
_PyNamespace_Type
) ?
"namespace"
:
ns
->
ob_type
->
tp_name
;
i
=
Py_ReprEnter
(
ns
);
if
(
i
!=
0
) {
return
i
>
0
?
PyUnicode_FromFormat
(
"%s(...)"
,
name
) :
NULL
;
}
pairs
=
PyList_New
(
0
);
if
(
pairs
==
NULL
)
goto
error
;
d
=
((
_PyNamespaceObject
*
)
ns
)
->
ns_dict
;
assert
(
d
!=
NULL
);
Py_INCREF
(
d
);
keys
=
PyDict_Keys
(
d
);
if
(
keys
==
NULL
)
goto
error
;
if
(
PyList_Sort
(
keys
)
!=
0
)
goto
error
;
keys_iter
=
PyObject_GetIter
(
keys
);
if
(
keys_iter
==
NULL
)
goto
error
;
while
((
key
=
PyIter_Next
(
keys_iter
))
!=
NULL
) {
if
(
PyUnicode_Check
(
key
)
&&
PyUnicode_GET_LENGTH
(
key
)
>
0
) {
PyObject
*
value
,
*
item
;
value
=
PyDict_GetItem
(
d
,
key
);
if
(
value
!=
NULL
) {
item
=
PyUnicode_FromFormat
(
"%S=%R"
,
key
,
value
);
if
(
item
==
NULL
) {
loop_error
=
1
;
}
else
{
loop_error
=
PyList_Append
(
pairs
,
item
);
Py_DECREF
(
item
);
}
}
}
Py_DECREF
(
key
);
if
(
loop_error
)
goto
error
;
}
separator
=
PyUnicode_FromString
(
", "
);
if
(
separator
==
NULL
)
goto
error
;
pairsrepr
=
PyUnicode_Join
(
separator
,
pairs
);
Py_DECREF
(
separator
);
if
(
pairsrepr
==
NULL
)
goto
error
;
repr
=
PyUnicode_FromFormat
(
"%s(%S)"
,
name
,
pairsrepr
);
Py_DECREF
(
pairsrepr
);
error
:
Py_XDECREF
(
pairs
);
Py_XDECREF
(
d
);
Py_XDECREF
(
keys
);
Py_XDECREF
(
keys_iter
);
Py_ReprLeave
(
ns
);
return
repr
;
}
static
int
namespace_traverse
(
_PyNamespaceObject
*
ns
,
visitproc
visit
,
void
*
arg
)
{
Py_VISIT
(
ns
->
ns_dict
);
return
0
;
}
static
int
namespace_clear
(
_PyNamespaceObject
*
ns
)
{
Py_CLEAR
(
ns
->
ns_dict
);
return
0
;
}
static
PyObject
*
namespace_richcompare
(
PyObject
*
self
,
PyObject
*
other
,
int
op
)
{
if
(
PyObject_TypeCheck
(
self
,
&
_PyNamespace_Type
)
&&
PyObject_TypeCheck
(
other
,
&
_PyNamespace_Type
))
return
PyObject_RichCompare
(((
_PyNamespaceObject
*
)
self
)
->
ns_dict
,
((
_PyNamespaceObject
*
)
other
)
->
ns_dict
,
op
);
Py_RETURN_NOTIMPLEMENTED
;
}
PyDoc_STRVAR
(
namespace_reduce__doc__
,
"Return state information for pickling"
);
static
PyObject
*
namespace_reduce
(
_PyNamespaceObject
*
ns
)
{
PyObject
*
result
,
*
args
=
PyTuple_New
(
0
);
if
(!
args
)
return
NULL
;
result
=
PyTuple_Pack
(
3
, (
PyObject
*
)
Py_TYPE
(
ns
),
args
,
ns
->
ns_dict
);
Py_DECREF
(
args
);
return
result
;
}
static
PyMethodDef
namespace_methods
[]
=
{
{
"__reduce__"
, (
PyCFunction
)
namespace_reduce
,
METH_NOARGS
,
namespace_reduce__doc__
},
{
NULL
,
NULL
}
// sentinel
};
PyDoc_STRVAR
(
namespace_doc
,
"A simple attribute-based namespace.\n\
\n\
SimpleNamespace(**kwargs)"
);
PyTypeObject
_PyNamespace_Type
=
{
PyVarObject_HEAD_INIT
(
&
PyType_Type
,
0
)
"types.SimpleNamespace"
,
/* tp_name */
sizeof
(
_PyNamespaceObject
),
/* tp_basicsize */
0
,
/* tp_itemsize */
(
destructor
)
namespace_dealloc
,
/* tp_dealloc */
0
,
/* tp_print */
0
,
/* tp_getattr */
0
,
/* tp_setattr */
0
,
/* tp_reserved */
(
reprfunc
)
namespace_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 */
PyObject_GenericSetAttr
,
/* tp_setattro */
0
,
/* tp_as_buffer */
Py_TPFLAGS_DEFAULT
|
Py_TPFLAGS_HAVE_GC
|
Py_TPFLAGS_BASETYPE
,
/* tp_flags */
namespace_doc
,
/* tp_doc */
(
traverseproc
)
namespace_traverse
,
/* tp_traverse */
(
inquiry
)
namespace_clear
,
/* tp_clear */
namespace_richcompare
,
/* tp_richcompare */
0
,
/* tp_weaklistoffset */
0
,
/* tp_iter */
0
,
/* tp_iternext */
namespace_methods
,
/* tp_methods */
namespace_members
,
/* tp_members */
0
,
/* tp_getset */
0
,
/* tp_base */
0
,
/* tp_dict */
0
,
/* tp_descr_get */
0
,
/* tp_descr_set */
offsetof(
_PyNamespaceObject
,
ns_dict
),
/* tp_dictoffset */
(
initproc
)
namespace_init
,
/* tp_init */
PyType_GenericAlloc
,
/* tp_alloc */
(
newfunc
)
namespace_new
,
/* tp_new */
PyObject_GC_Del
,
/* tp_free */
};
PyObject
*
_PyNamespace_New
(
PyObject
*
kwds
)
{
PyObject
*
ns
=
namespace_new
(
&
_PyNamespace_Type
,
NULL
,
NULL
);
if
(
ns
==
NULL
)
return
NULL
;
if
(
kwds
==
NULL
)
return
ns
;
if
(
PyDict_Update
(((
_PyNamespaceObject
*
)
ns
)
->
ns_dict
,
kwds
)
!=
0
) {
Py_DECREF
(
ns
);
return
NULL
;
}
return
(
PyObject
*
)
ns
;
}
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