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cpython/Doc/includes/custom3.c at 3.7 · python-emscripten/cpython · GitHub
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#define
PY_SSIZE_T_CLEAN
#include
<Python.h>
#include
"structmember.h"
typedef
struct
{
PyObject_HEAD
PyObject
*
first
;
/* first name */
PyObject
*
last
;
/* last name */
int
number
;
}
CustomObject
;
static
void
Custom_dealloc
(
CustomObject
*
self
)
{
Py_XDECREF
(
self
->
first
);
Py_XDECREF
(
self
->
last
);
Py_TYPE
(
self
)
->
tp_free
((
PyObject
*
)
self
);
}
static
PyObject
*
Custom_new
(
PyTypeObject
*
type
,
PyObject
*
args
,
PyObject
*
kwds
)
{
CustomObject
*
self
;
self
=
(
CustomObject
*
)
type
->
tp_alloc
(
type
,
0
);
if
(
self
!=
NULL
) {
self
->
first
=
PyUnicode_FromString
(
""
);
if
(
self
->
first
==
NULL
) {
Py_DECREF
(
self
);
return
NULL
;
}
self
->
last
=
PyUnicode_FromString
(
""
);
if
(
self
->
last
==
NULL
) {
Py_DECREF
(
self
);
return
NULL
;
}
self
->
number
=
0
;
}
return
(
PyObject
*
)
self
;
}
static
int
Custom_init
(
CustomObject
*
self
,
PyObject
*
args
,
PyObject
*
kwds
)
{
static
char
*
kwlist
[]
=
{
"first"
,
"last"
,
"number"
,
NULL
};
PyObject
*
first
=
NULL
,
*
last
=
NULL
,
*
tmp
;
if
(!
PyArg_ParseTupleAndKeywords
(
args
,
kwds
,
"|UUi"
,
kwlist
,
&
first
,
&
last
,
&
self
->
number
))
return
-1
;
if
(
first
) {
tmp
=
self
->
first
;
Py_INCREF
(
first
);
self
->
first
=
first
;
Py_DECREF
(
tmp
);
}
if
(
last
) {
tmp
=
self
->
last
;
Py_INCREF
(
last
);
self
->
last
=
last
;
Py_DECREF
(
tmp
);
}
return
0
;
}
static
PyMemberDef
Custom_members
[]
=
{
{
"number"
,
T_INT
, offsetof(
CustomObject
,
number
),
0
,
"custom number"
},
{
NULL
}
/* Sentinel */
};
static
PyObject
*
Custom_getfirst
(
CustomObject
*
self
,
void
*
closure
)
{
Py_INCREF
(
self
->
first
);
return
self
->
first
;
}
static
int
Custom_setfirst
(
CustomObject
*
self
,
PyObject
*
value
,
void
*
closure
)
{
PyObject
*
tmp
;
if
(
value
==
NULL
) {
PyErr_SetString
(
PyExc_TypeError
,
"Cannot delete the first attribute"
);
return
-1
;
}
if
(!
PyUnicode_Check
(
value
)) {
PyErr_SetString
(
PyExc_TypeError
,
"The first attribute value must be a string"
);
return
-1
;
}
tmp
=
self
->
first
;
Py_INCREF
(
value
);
self
->
first
=
value
;
Py_DECREF
(
tmp
);
return
0
;
}
static
PyObject
*
Custom_getlast
(
CustomObject
*
self
,
void
*
closure
)
{
Py_INCREF
(
self
->
last
);
return
self
->
last
;
}
static
int
Custom_setlast
(
CustomObject
*
self
,
PyObject
*
value
,
void
*
closure
)
{
PyObject
*
tmp
;
if
(
value
==
NULL
) {
PyErr_SetString
(
PyExc_TypeError
,
"Cannot delete the last attribute"
);
return
-1
;
}
if
(!
PyUnicode_Check
(
value
)) {
PyErr_SetString
(
PyExc_TypeError
,
"The last attribute value must be a string"
);
return
-1
;
}
tmp
=
self
->
last
;
Py_INCREF
(
value
);
self
->
last
=
value
;
Py_DECREF
(
tmp
);
return
0
;
}
static
PyGetSetDef
Custom_getsetters
[]
=
{
{
"first"
, (
getter
)
Custom_getfirst
, (
setter
)
Custom_setfirst
,
"first name"
,
NULL
},
{
"last"
, (
getter
)
Custom_getlast
, (
setter
)
Custom_setlast
,
"last name"
,
NULL
},
{
NULL
}
/* Sentinel */
};
static
PyObject
*
Custom_name
(
CustomObject
*
self
,
PyObject
*
Py_UNUSED
(
ignored
))
{
return
PyUnicode_FromFormat
(
"%S %S"
,
self
->
first
,
self
->
last
);
}
static
PyMethodDef
Custom_methods
[]
=
{
{
"name"
, (
PyCFunction
)
Custom_name
,
METH_NOARGS
,
"Return the name, combining the first and last name"
},
{
NULL
}
/* Sentinel */
};
static
PyTypeObject
CustomType
=
{
PyVarObject_HEAD_INIT
(
NULL
,
0
)
.
tp_name
=
"custom3.Custom"
,
.
tp_doc
=
"Custom objects"
,
.
tp_basicsize
=
sizeof
(
CustomObject
),
.
tp_itemsize
=
0
,
.
tp_flags
=
Py_TPFLAGS_DEFAULT
|
Py_TPFLAGS_BASETYPE
,
.
tp_new
=
Custom_new
,
.
tp_init
=
(
initproc
)
Custom_init
,
.
tp_dealloc
=
(
destructor
)
Custom_dealloc
,
.
tp_members
=
Custom_members
,
.
tp_methods
=
Custom_methods
,
.
tp_getset
=
Custom_getsetters
,
};
static
PyModuleDef
custommodule
=
{
PyModuleDef_HEAD_INIT
,
.
m_name
=
"custom3"
,
.
m_doc
=
"Example module that creates an extension type."
,
.
m_size
=
-1
,
};
PyMODINIT_FUNC
PyInit_custom3
(
void
)
{
PyObject
*
m
;
if
(
PyType_Ready
(
&
CustomType
)
<
0
)
return
NULL
;
m
=
PyModule_Create
(
&
custommodule
);
if
(
m
==
NULL
)
return
NULL
;
Py_INCREF
(
&
CustomType
);
if
(
PyModule_AddObject
(
m
,
"Custom"
, (
PyObject
*
)
&
CustomType
)
<
0
) {
Py_DECREF
(
&
CustomType
);
Py_DECREF
(
m
);
return
NULL
;
}
return
m
;
}
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