xref: /vim-8.2.3635/src/if_python3.c (revision 8ea05de6) 
1 /* vi:set ts=8 sts=4 sw=4 noet:
2  *
3  * VIM - Vi IMproved    by Bram Moolenaar
4  *
5  * Do ":help uganda"  in Vim to read copying and usage conditions.
6  * Do ":help credits" in Vim to see a list of people who contributed.
7  * See README.txt for an overview of the Vim source code.
8  */
9 /*
10  * Python extensions by Paul Moore.
11  * Changes for Unix by David Leonard.
12  *
13  * This consists of four parts:
14  * 1. Python interpreter main program
15  * 2. Python output stream: writes output via [e]msg().
16  * 3. Implementation of the Vim module for Python
17  * 4. Utility functions for handling the interface between Vim and Python.
18  */
19 
20 /*
21  * Roland Puntaier 2009/sept/16:
22  * Adaptations to support both python3.x and python2.x
23  */
24 
25 // uncomment this if used with the debug version of python
26 // #define Py_DEBUG
27 // Note: most of time you can add -DPy_DEBUG to CFLAGS in place of uncommenting
28 // uncomment this if used with the debug version of python, but without its
29 // allocator
30 // #define Py_DEBUG_NO_PYMALLOC
31 
32 #include "vim.h"
33 
34 #include <limits.h>
35 
36 #if defined(MSWIN) && defined(HAVE_FCNTL_H)
37 # undef HAVE_FCNTL_H
38 #endif
39 
40 #ifdef _DEBUG
41 # undef _DEBUG
42 #endif
43 
44 #ifdef F_BLANK
45 # undef F_BLANK
46 #endif
47 
48 #ifdef HAVE_STRFTIME
49 # undef HAVE_STRFTIME
50 #endif
51 #ifdef HAVE_STRING_H
52 # undef HAVE_STRING_H
53 #endif
54 #ifdef HAVE_PUTENV
55 # undef HAVE_PUTENV
56 #endif
57 #ifdef HAVE_STDARG_H
58 # undef HAVE_STDARG_H   // Python's config.h defines it as well.
59 #endif
60 #ifdef _POSIX_C_SOURCE  // defined in feature.h
61 # undef _POSIX_C_SOURCE
62 #endif
63 #ifdef _XOPEN_SOURCE
64 # undef _XOPEN_SOURCE	// pyconfig.h defines it as well.
65 #endif
66 
67 #define PY_SSIZE_T_CLEAN
68 
69 #include <Python.h>
70 
71 #undef main // Defined in python.h - aargh
72 #undef HAVE_FCNTL_H // Clash with os_win32.h
73 
74 // The "surrogateescape" error handler is new in Python 3.1
75 #if PY_VERSION_HEX >= 0x030100f0
76 # define CODEC_ERROR_HANDLER "surrogateescape"
77 #else
78 # define CODEC_ERROR_HANDLER NULL
79 #endif
80 
81 // Python 3 does not support CObjects, always use Capsules
82 #define PY_USE_CAPSULE
83 
84 #define PyInt Py_ssize_t
85 #ifndef PyString_Check
86 # define PyString_Check(obj) PyUnicode_Check(obj)
87 #endif
88 #define PyString_FromString(repr) \
89     PyUnicode_Decode(repr, STRLEN(repr), ENC_OPT, NULL)
90 #define PyString_FromFormat PyUnicode_FromFormat
91 #ifndef PyInt_Check
92 # define PyInt_Check(obj) PyLong_Check(obj)
93 #endif
94 #define PyInt_FromLong(i) PyLong_FromLong(i)
95 #define PyInt_AsLong(obj) PyLong_AsLong(obj)
96 #define Py_ssize_t_fmt "n"
97 #define Py_bytes_fmt "y"
98 
99 #define PyIntArgFunc	ssizeargfunc
100 #define PyIntObjArgProc	ssizeobjargproc
101 
102 /*
103  * PySlice_GetIndicesEx(): first argument type changed from PySliceObject
104  * to PyObject in Python 3.2 or later.
105  */
106 #if PY_VERSION_HEX >= 0x030200f0
107 typedef PyObject PySliceObject_T;
108 #else
109 typedef PySliceObject PySliceObject_T;
110 #endif
111 
112 #if defined(DYNAMIC_PYTHON3) || defined(PROTO)
113 
114 # ifndef MSWIN
115 #  include <dlfcn.h>
116 #  define FARPROC void*
117 #  define HINSTANCE void*
118 #  if defined(PY_NO_RTLD_GLOBAL) && defined(PY3_NO_RTLD_GLOBAL)
119 #   define load_dll(n) dlopen((n), RTLD_LAZY)
120 #  else
121 #   define load_dll(n) dlopen((n), RTLD_LAZY|RTLD_GLOBAL)
122 #  endif
123 #  define close_dll dlclose
124 #  define symbol_from_dll dlsym
125 # else
126 #  define load_dll vimLoadLib
127 #  define close_dll FreeLibrary
128 #  define symbol_from_dll GetProcAddress
129 # endif
130 /*
131  * Wrapper defines
132  */
133 # undef PyArg_Parse
134 # define PyArg_Parse py3_PyArg_Parse
135 # undef PyArg_ParseTuple
136 # define PyArg_ParseTuple py3_PyArg_ParseTuple
137 # define PyMem_Free py3_PyMem_Free
138 # define PyMem_Malloc py3_PyMem_Malloc
139 # define PyDict_SetItemString py3_PyDict_SetItemString
140 # define PyErr_BadArgument py3_PyErr_BadArgument
141 # define PyErr_Clear py3_PyErr_Clear
142 # define PyErr_Format py3_PyErr_Format
143 # define PyErr_PrintEx py3_PyErr_PrintEx
144 # define PyErr_NoMemory py3_PyErr_NoMemory
145 # define PyErr_Occurred py3_PyErr_Occurred
146 # define PyErr_SetNone py3_PyErr_SetNone
147 # define PyErr_SetString py3_PyErr_SetString
148 # define PyErr_SetObject py3_PyErr_SetObject
149 # define PyErr_ExceptionMatches py3_PyErr_ExceptionMatches
150 # define PyEval_InitThreads py3_PyEval_InitThreads
151 # define PyEval_RestoreThread py3_PyEval_RestoreThread
152 # define PyEval_SaveThread py3_PyEval_SaveThread
153 # define PyGILState_Ensure py3_PyGILState_Ensure
154 # define PyGILState_Release py3_PyGILState_Release
155 # define PyLong_AsLong py3_PyLong_AsLong
156 # define PyLong_FromLong py3_PyLong_FromLong
157 # define PyList_GetItem py3_PyList_GetItem
158 # define PyList_Append py3_PyList_Append
159 # define PyList_Insert py3_PyList_Insert
160 # define PyList_New py3_PyList_New
161 # define PyList_SetItem py3_PyList_SetItem
162 # define PyList_Size py3_PyList_Size
163 # define PySequence_Check py3_PySequence_Check
164 # define PySequence_Size py3_PySequence_Size
165 # define PySequence_GetItem py3_PySequence_GetItem
166 # define PySequence_Fast py3_PySequence_Fast
167 # define PyTuple_Size py3_PyTuple_Size
168 # define PyTuple_GetItem py3_PyTuple_GetItem
169 # if PY_VERSION_HEX >= 0x030601f0
170 #  define PySlice_AdjustIndices py3_PySlice_AdjustIndices
171 #  define PySlice_Unpack py3_PySlice_Unpack
172 # endif
173 # undef PySlice_GetIndicesEx
174 # define PySlice_GetIndicesEx py3_PySlice_GetIndicesEx
175 # define PyImport_ImportModule py3_PyImport_ImportModule
176 # define PyObject_Init py3__PyObject_Init
177 # define PyDict_New py3_PyDict_New
178 # define PyDict_GetItemString py3_PyDict_GetItemString
179 # define PyDict_Next py3_PyDict_Next
180 # define PyMapping_Check py3_PyMapping_Check
181 # ifndef PyMapping_Keys
182 #  define PyMapping_Keys py3_PyMapping_Keys
183 # endif
184 # define PyIter_Next py3_PyIter_Next
185 # define PyObject_GetIter py3_PyObject_GetIter
186 # define PyObject_Repr py3_PyObject_Repr
187 # define PyObject_GetItem py3_PyObject_GetItem
188 # define PyObject_IsTrue py3_PyObject_IsTrue
189 # define PyModule_GetDict py3_PyModule_GetDict
190 #undef PyRun_SimpleString
191 # define PyRun_SimpleString py3_PyRun_SimpleString
192 #undef PyRun_String
193 # define PyRun_String py3_PyRun_String
194 # define PyObject_GetAttrString py3_PyObject_GetAttrString
195 # define PyObject_HasAttrString py3_PyObject_HasAttrString
196 # define PyObject_SetAttrString py3_PyObject_SetAttrString
197 # define PyObject_CallFunctionObjArgs py3_PyObject_CallFunctionObjArgs
198 # define _PyObject_CallFunction_SizeT py3__PyObject_CallFunction_SizeT
199 # define PyObject_Call py3_PyObject_Call
200 # define PyEval_GetLocals py3_PyEval_GetLocals
201 # define PyEval_GetGlobals py3_PyEval_GetGlobals
202 # define PySys_SetObject py3_PySys_SetObject
203 # define PySys_GetObject py3_PySys_GetObject
204 # define PySys_SetArgv py3_PySys_SetArgv
205 # define PyType_Ready py3_PyType_Ready
206 # if PY_VERSION_HEX >= 0x030900b0
207 #  define PyType_GetFlags py3_PyType_GetFlags
208 # endif
209 #undef Py_BuildValue
210 # define Py_BuildValue py3_Py_BuildValue
211 # define Py_SetPythonHome py3_Py_SetPythonHome
212 # define Py_Initialize py3_Py_Initialize
213 # define Py_Finalize py3_Py_Finalize
214 # define Py_IsInitialized py3_Py_IsInitialized
215 # define _Py_NoneStruct (*py3__Py_NoneStruct)
216 # define _Py_FalseStruct (*py3__Py_FalseStruct)
217 # define _Py_TrueStruct (*py3__Py_TrueStruct)
218 # define _PyObject_NextNotImplemented (*py3__PyObject_NextNotImplemented)
219 # define PyModule_AddObject py3_PyModule_AddObject
220 # define PyImport_AppendInittab py3_PyImport_AppendInittab
221 # define PyImport_AddModule py3_PyImport_AddModule
222 # if PY_VERSION_HEX >= 0x030300f0
223 #  undef _PyUnicode_AsString
224 #  define _PyUnicode_AsString py3_PyUnicode_AsUTF8
225 # else
226 #  define _PyUnicode_AsString py3__PyUnicode_AsString
227 # endif
228 # undef PyUnicode_AsEncodedString
229 # define PyUnicode_AsEncodedString py3_PyUnicode_AsEncodedString
230 # undef PyBytes_AsString
231 # define PyBytes_AsString py3_PyBytes_AsString
232 # ifndef PyBytes_AsStringAndSize
233 #  define PyBytes_AsStringAndSize py3_PyBytes_AsStringAndSize
234 # endif
235 # undef PyBytes_FromString
236 # define PyBytes_FromString py3_PyBytes_FromString
237 # undef PyBytes_FromStringAndSize
238 # define PyBytes_FromStringAndSize py3_PyBytes_FromStringAndSize
239 # if defined(Py_DEBUG) || PY_VERSION_HEX >= 0x030900b0
240 #  define _Py_Dealloc py3__Py_Dealloc
241 # endif
242 # define PyFloat_FromDouble py3_PyFloat_FromDouble
243 # define PyFloat_AsDouble py3_PyFloat_AsDouble
244 # define PyObject_GenericGetAttr py3_PyObject_GenericGetAttr
245 # define PyType_Type (*py3_PyType_Type)
246 # define PyStdPrinter_Type (*py3_PyStdPrinter_Type)
247 # define PySlice_Type (*py3_PySlice_Type)
248 # define PyFloat_Type (*py3_PyFloat_Type)
249 # define PyNumber_Check (*py3_PyNumber_Check)
250 # define PyNumber_Long (*py3_PyNumber_Long)
251 # define PyBool_Type (*py3_PyBool_Type)
252 # define PyErr_NewException py3_PyErr_NewException
253 # ifdef Py_DEBUG
254 #  define _Py_NegativeRefcount py3__Py_NegativeRefcount
255 #  define _Py_RefTotal (*py3__Py_RefTotal)
256 #  define PyModule_Create2TraceRefs py3_PyModule_Create2TraceRefs
257 # else
258 #  define PyModule_Create2 py3_PyModule_Create2
259 # endif
260 # if defined(Py_DEBUG) && !defined(Py_DEBUG_NO_PYMALLOC)
261 #  define _PyObject_DebugMalloc py3__PyObject_DebugMalloc
262 #  define _PyObject_DebugFree py3__PyObject_DebugFree
263 # else
264 #  define PyObject_Malloc py3_PyObject_Malloc
265 #  define PyObject_Free py3_PyObject_Free
266 # endif
267 # define _PyObject_GC_New py3__PyObject_GC_New
268 # define PyObject_GC_Del py3_PyObject_GC_Del
269 # define PyObject_GC_UnTrack py3_PyObject_GC_UnTrack
270 # define PyType_GenericAlloc py3_PyType_GenericAlloc
271 # define PyType_GenericNew py3_PyType_GenericNew
272 # undef PyUnicode_FromString
273 # define PyUnicode_FromString py3_PyUnicode_FromString
274 # ifndef PyUnicode_FromFormat
275 #  define PyUnicode_FromFormat py3_PyUnicode_FromFormat
276 # else
277 #  define Py_UNICODE_USE_UCS_FUNCTIONS
278 #  ifdef Py_UNICODE_WIDE
279 #   define PyUnicodeUCS4_FromFormat py3_PyUnicodeUCS4_FromFormat
280 #  else
281 #   define PyUnicodeUCS2_FromFormat py3_PyUnicodeUCS2_FromFormat
282 #  endif
283 # endif
284 # undef PyUnicode_Decode
285 # define PyUnicode_Decode py3_PyUnicode_Decode
286 # define PyType_IsSubtype py3_PyType_IsSubtype
287 # define PyCapsule_New py3_PyCapsule_New
288 # define PyCapsule_GetPointer py3_PyCapsule_GetPointer
289 
290 # if defined(Py_DEBUG) && !defined(Py_DEBUG_NO_PYMALLOC)
291 #  undef PyObject_NEW
292 #  define PyObject_NEW(type, typeobj) \
293 ( (type *) PyObject_Init( \
294 	(PyObject *) _PyObject_DebugMalloc( _PyObject_SIZE(typeobj) ), (typeobj)) )
295 # elif PY_VERSION_HEX >= 0x030900b0
296 #  undef PyObject_NEW
297 #  define PyObject_NEW(type, typeobj) \
298 	((type *)py3__PyObject_New(typeobj))
299 # endif
300 
301 /*
302  * Pointers for dynamic link
303  */
304 static int (*py3_PySys_SetArgv)(int, wchar_t **);
305 static void (*py3_Py_SetPythonHome)(wchar_t *home);
306 static void (*py3_Py_Initialize)(void);
307 static PyObject* (*py3_PyList_New)(Py_ssize_t size);
308 static PyGILState_STATE (*py3_PyGILState_Ensure)(void);
309 static void (*py3_PyGILState_Release)(PyGILState_STATE);
310 static int (*py3_PySys_SetObject)(char *, PyObject *);
311 static PyObject* (*py3_PySys_GetObject)(char *);
312 static int (*py3_PyList_Append)(PyObject *, PyObject *);
313 static int (*py3_PyList_Insert)(PyObject *, int, PyObject *);
314 static Py_ssize_t (*py3_PyList_Size)(PyObject *);
315 static int (*py3_PySequence_Check)(PyObject *);
316 static Py_ssize_t (*py3_PySequence_Size)(PyObject *);
317 static PyObject* (*py3_PySequence_GetItem)(PyObject *, Py_ssize_t);
318 static PyObject* (*py3_PySequence_Fast)(PyObject *, const char *);
319 static Py_ssize_t (*py3_PyTuple_Size)(PyObject *);
320 static PyObject* (*py3_PyTuple_GetItem)(PyObject *, Py_ssize_t);
321 static int (*py3_PyMapping_Check)(PyObject *);
322 static PyObject* (*py3_PyMapping_Keys)(PyObject *);
323 # if PY_VERSION_HEX >= 0x030601f0
324 static int (*py3_PySlice_AdjustIndices)(Py_ssize_t length,
325 		     Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t step);
326 static int (*py3_PySlice_Unpack)(PyObject *slice,
327 		     Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step);
328 # endif
329 static int (*py3_PySlice_GetIndicesEx)(PySliceObject_T *r, Py_ssize_t length,
330 		     Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step,
331 		     Py_ssize_t *slicelen);
332 static PyObject* (*py3_PyErr_NoMemory)(void);
333 static void (*py3_Py_Finalize)(void);
334 static void (*py3_PyErr_SetString)(PyObject *, const char *);
335 static void (*py3_PyErr_SetObject)(PyObject *, PyObject *);
336 static int (*py3_PyErr_ExceptionMatches)(PyObject *);
337 static int (*py3_PyRun_SimpleString)(char *);
338 static PyObject* (*py3_PyRun_String)(char *, int, PyObject *, PyObject *);
339 static PyObject* (*py3_PyObject_GetAttrString)(PyObject *, const char *);
340 static int (*py3_PyObject_HasAttrString)(PyObject *, const char *);
341 static int (*py3_PyObject_SetAttrString)(PyObject *, const char *, PyObject *);
342 static PyObject* (*py3_PyObject_CallFunctionObjArgs)(PyObject *, ...);
343 static PyObject* (*py3__PyObject_CallFunction_SizeT)(PyObject *, char *, ...);
344 static PyObject* (*py3_PyObject_Call)(PyObject *, PyObject *, PyObject *);
345 static PyObject* (*py3_PyEval_GetGlobals)();
346 static PyObject* (*py3_PyEval_GetLocals)();
347 static PyObject* (*py3_PyList_GetItem)(PyObject *, Py_ssize_t);
348 static PyObject* (*py3_PyImport_ImportModule)(const char *);
349 static PyObject* (*py3_PyImport_AddModule)(const char *);
350 static int (*py3_PyErr_BadArgument)(void);
351 static PyObject* (*py3_PyErr_Occurred)(void);
352 static PyObject* (*py3_PyModule_GetDict)(PyObject *);
353 static int (*py3_PyList_SetItem)(PyObject *, Py_ssize_t, PyObject *);
354 static PyObject* (*py3_PyDict_GetItemString)(PyObject *, const char *);
355 static int (*py3_PyDict_Next)(PyObject *, Py_ssize_t *, PyObject **, PyObject **);
356 static PyObject* (*py3_PyLong_FromLong)(long);
357 static PyObject* (*py3_PyDict_New)(void);
358 static PyObject* (*py3_PyIter_Next)(PyObject *);
359 static PyObject* (*py3_PyObject_GetIter)(PyObject *);
360 static PyObject* (*py3_PyObject_Repr)(PyObject *);
361 static PyObject* (*py3_PyObject_GetItem)(PyObject *, PyObject *);
362 static int (*py3_PyObject_IsTrue)(PyObject *);
363 static PyObject* (*py3_Py_BuildValue)(char *, ...);
364 # if PY_VERSION_HEX >= 0x030900b0
365 static int (*py3_PyType_GetFlags)(PyTypeObject *o);
366 # endif
367 static int (*py3_PyType_Ready)(PyTypeObject *type);
368 static int (*py3_PyDict_SetItemString)(PyObject *dp, char *key, PyObject *item);
369 static PyObject* (*py3_PyUnicode_FromString)(const char *u);
370 # ifndef Py_UNICODE_USE_UCS_FUNCTIONS
371 static PyObject* (*py3_PyUnicode_FromFormat)(const char *u, ...);
372 # else
373 #  ifdef Py_UNICODE_WIDE
374 static PyObject* (*py3_PyUnicodeUCS4_FromFormat)(const char *u, ...);
375 #  else
376 static PyObject* (*py3_PyUnicodeUCS2_FromFormat)(const char *u, ...);
377 #  endif
378 # endif
379 static PyObject* (*py3_PyUnicode_Decode)(const char *u, Py_ssize_t size,
380 	const char *encoding, const char *errors);
381 static long (*py3_PyLong_AsLong)(PyObject *);
382 static void (*py3_PyErr_SetNone)(PyObject *);
383 static void (*py3_PyEval_InitThreads)(void);
384 static void(*py3_PyEval_RestoreThread)(PyThreadState *);
385 static PyThreadState*(*py3_PyEval_SaveThread)(void);
386 static int (*py3_PyArg_Parse)(PyObject *, char *, ...);
387 static int (*py3_PyArg_ParseTuple)(PyObject *, char *, ...);
388 static int (*py3_PyMem_Free)(void *);
389 static void* (*py3_PyMem_Malloc)(size_t);
390 static int (*py3_Py_IsInitialized)(void);
391 static void (*py3_PyErr_Clear)(void);
392 static PyObject* (*py3_PyErr_Format)(PyObject *, const char *, ...);
393 static void (*py3_PyErr_PrintEx)(int);
394 static PyObject*(*py3__PyObject_Init)(PyObject *, PyTypeObject *);
395 static iternextfunc py3__PyObject_NextNotImplemented;
396 static PyObject* py3__Py_NoneStruct;
397 static PyObject* py3__Py_FalseStruct;
398 static PyObject* py3__Py_TrueStruct;
399 static int (*py3_PyModule_AddObject)(PyObject *m, const char *name, PyObject *o);
400 static int (*py3_PyImport_AppendInittab)(const char *name, PyObject* (*initfunc)(void));
401 # if PY_VERSION_HEX >= 0x030300f0
402 static char* (*py3_PyUnicode_AsUTF8)(PyObject *unicode);
403 # else
404 static char* (*py3__PyUnicode_AsString)(PyObject *unicode);
405 # endif
406 static PyObject* (*py3_PyUnicode_AsEncodedString)(PyObject *unicode, const char* encoding, const char* errors);
407 static char* (*py3_PyBytes_AsString)(PyObject *bytes);
408 static int (*py3_PyBytes_AsStringAndSize)(PyObject *bytes, char **buffer, Py_ssize_t *length);
409 static PyObject* (*py3_PyBytes_FromString)(char *str);
410 static PyObject* (*py3_PyBytes_FromStringAndSize)(char *str, Py_ssize_t length);
411 # if defined(Py_DEBUG) || PY_VERSION_HEX >= 0x030900b0
412 static void (*py3__Py_Dealloc)(PyObject *obj);
413 # endif
414 # if PY_VERSION_HEX >= 0x030900b0
415 static PyObject* (*py3__PyObject_New)(PyTypeObject *);
416 # endif
417 static PyObject* (*py3_PyFloat_FromDouble)(double num);
418 static double (*py3_PyFloat_AsDouble)(PyObject *);
419 static PyObject* (*py3_PyObject_GenericGetAttr)(PyObject *obj, PyObject *name);
420 static PyObject* (*py3_PyType_GenericAlloc)(PyTypeObject *type, Py_ssize_t nitems);
421 static PyObject* (*py3_PyType_GenericNew)(PyTypeObject *type, PyObject *args, PyObject *kwds);
422 static PyTypeObject* py3_PyType_Type;
423 static PyTypeObject* py3_PyStdPrinter_Type;
424 static PyTypeObject* py3_PySlice_Type;
425 static PyTypeObject* py3_PyFloat_Type;
426 static PyTypeObject* py3_PyBool_Type;
427 static int (*py3_PyNumber_Check)(PyObject *);
428 static PyObject* (*py3_PyNumber_Long)(PyObject *);
429 static PyObject* (*py3_PyErr_NewException)(char *name, PyObject *base, PyObject *dict);
430 static PyObject* (*py3_PyCapsule_New)(void *, char *, PyCapsule_Destructor);
431 static void* (*py3_PyCapsule_GetPointer)(PyObject *, char *);
432 # ifdef Py_DEBUG
433 static void (*py3__Py_NegativeRefcount)(const char *fname, int lineno, PyObject *op);
434 static Py_ssize_t* py3__Py_RefTotal;
435 static PyObject* (*py3_PyModule_Create2TraceRefs)(struct PyModuleDef* module, int module_api_version);
436 # else
437 static PyObject* (*py3_PyModule_Create2)(struct PyModuleDef* module, int module_api_version);
438 # endif
439 # if defined(Py_DEBUG) && !defined(Py_DEBUG_NO_PYMALLOC)
440 static void (*py3__PyObject_DebugFree)(void*);
441 static void* (*py3__PyObject_DebugMalloc)(size_t);
442 # else
443 static void (*py3_PyObject_Free)(void*);
444 static void* (*py3_PyObject_Malloc)(size_t);
445 # endif
446 static PyObject*(*py3__PyObject_GC_New)(PyTypeObject *);
447 static void(*py3_PyObject_GC_Del)(void *);
448 static void(*py3_PyObject_GC_UnTrack)(void *);
449 static int (*py3_PyType_IsSubtype)(PyTypeObject *, PyTypeObject *);
450 
451 static HINSTANCE hinstPy3 = 0; // Instance of python.dll
452 
453 // Imported exception objects
454 static PyObject *p3imp_PyExc_AttributeError;
455 static PyObject *p3imp_PyExc_IndexError;
456 static PyObject *p3imp_PyExc_KeyError;
457 static PyObject *p3imp_PyExc_KeyboardInterrupt;
458 static PyObject *p3imp_PyExc_TypeError;
459 static PyObject *p3imp_PyExc_ValueError;
460 static PyObject *p3imp_PyExc_SystemExit;
461 static PyObject *p3imp_PyExc_RuntimeError;
462 static PyObject *p3imp_PyExc_ImportError;
463 static PyObject *p3imp_PyExc_OverflowError;
464 
465 # define PyExc_AttributeError p3imp_PyExc_AttributeError
466 # define PyExc_IndexError p3imp_PyExc_IndexError
467 # define PyExc_KeyError p3imp_PyExc_KeyError
468 # define PyExc_KeyboardInterrupt p3imp_PyExc_KeyboardInterrupt
469 # define PyExc_TypeError p3imp_PyExc_TypeError
470 # define PyExc_ValueError p3imp_PyExc_ValueError
471 # define PyExc_SystemExit p3imp_PyExc_SystemExit
472 # define PyExc_RuntimeError p3imp_PyExc_RuntimeError
473 # define PyExc_ImportError p3imp_PyExc_ImportError
474 # define PyExc_OverflowError p3imp_PyExc_OverflowError
475 
476 /*
477  * Table of name to function pointer of python.
478  */
479 # define PYTHON_PROC FARPROC
480 static struct
481 {
482     char *name;
483     PYTHON_PROC *ptr;
484 } py3_funcname_table[] =
485 {
486     {"PySys_SetArgv", (PYTHON_PROC*)&py3_PySys_SetArgv},
487     {"Py_SetPythonHome", (PYTHON_PROC*)&py3_Py_SetPythonHome},
488     {"Py_Initialize", (PYTHON_PROC*)&py3_Py_Initialize},
489     {"_PyArg_ParseTuple_SizeT", (PYTHON_PROC*)&py3_PyArg_ParseTuple},
490     {"_Py_BuildValue_SizeT", (PYTHON_PROC*)&py3_Py_BuildValue},
491     {"PyMem_Free", (PYTHON_PROC*)&py3_PyMem_Free},
492     {"PyMem_Malloc", (PYTHON_PROC*)&py3_PyMem_Malloc},
493     {"PyList_New", (PYTHON_PROC*)&py3_PyList_New},
494     {"PyGILState_Ensure", (PYTHON_PROC*)&py3_PyGILState_Ensure},
495     {"PyGILState_Release", (PYTHON_PROC*)&py3_PyGILState_Release},
496     {"PySys_SetObject", (PYTHON_PROC*)&py3_PySys_SetObject},
497     {"PySys_GetObject", (PYTHON_PROC*)&py3_PySys_GetObject},
498     {"PyList_Append", (PYTHON_PROC*)&py3_PyList_Append},
499     {"PyList_Insert", (PYTHON_PROC*)&py3_PyList_Insert},
500     {"PyList_Size", (PYTHON_PROC*)&py3_PyList_Size},
501     {"PySequence_Check", (PYTHON_PROC*)&py3_PySequence_Check},
502     {"PySequence_Size", (PYTHON_PROC*)&py3_PySequence_Size},
503     {"PySequence_GetItem", (PYTHON_PROC*)&py3_PySequence_GetItem},
504     {"PySequence_Fast", (PYTHON_PROC*)&py3_PySequence_Fast},
505     {"PyTuple_Size", (PYTHON_PROC*)&py3_PyTuple_Size},
506     {"PyTuple_GetItem", (PYTHON_PROC*)&py3_PyTuple_GetItem},
507 # if PY_VERSION_HEX >= 0x030601f0
508     {"PySlice_AdjustIndices", (PYTHON_PROC*)&py3_PySlice_AdjustIndices},
509     {"PySlice_Unpack", (PYTHON_PROC*)&py3_PySlice_Unpack},
510 # endif
511     {"PySlice_GetIndicesEx", (PYTHON_PROC*)&py3_PySlice_GetIndicesEx},
512     {"PyErr_NoMemory", (PYTHON_PROC*)&py3_PyErr_NoMemory},
513     {"Py_Finalize", (PYTHON_PROC*)&py3_Py_Finalize},
514     {"PyErr_SetString", (PYTHON_PROC*)&py3_PyErr_SetString},
515     {"PyErr_SetObject", (PYTHON_PROC*)&py3_PyErr_SetObject},
516     {"PyErr_ExceptionMatches", (PYTHON_PROC*)&py3_PyErr_ExceptionMatches},
517     {"PyRun_SimpleString", (PYTHON_PROC*)&py3_PyRun_SimpleString},
518     {"PyRun_String", (PYTHON_PROC*)&py3_PyRun_String},
519     {"PyObject_GetAttrString", (PYTHON_PROC*)&py3_PyObject_GetAttrString},
520     {"PyObject_HasAttrString", (PYTHON_PROC*)&py3_PyObject_HasAttrString},
521     {"PyObject_SetAttrString", (PYTHON_PROC*)&py3_PyObject_SetAttrString},
522     {"PyObject_CallFunctionObjArgs", (PYTHON_PROC*)&py3_PyObject_CallFunctionObjArgs},
523     {"_PyObject_CallFunction_SizeT", (PYTHON_PROC*)&py3__PyObject_CallFunction_SizeT},
524     {"PyObject_Call", (PYTHON_PROC*)&py3_PyObject_Call},
525     {"PyEval_GetGlobals", (PYTHON_PROC*)&py3_PyEval_GetGlobals},
526     {"PyEval_GetLocals", (PYTHON_PROC*)&py3_PyEval_GetLocals},
527     {"PyList_GetItem", (PYTHON_PROC*)&py3_PyList_GetItem},
528     {"PyImport_ImportModule", (PYTHON_PROC*)&py3_PyImport_ImportModule},
529     {"PyImport_AddModule", (PYTHON_PROC*)&py3_PyImport_AddModule},
530     {"PyErr_BadArgument", (PYTHON_PROC*)&py3_PyErr_BadArgument},
531     {"PyErr_Occurred", (PYTHON_PROC*)&py3_PyErr_Occurred},
532     {"PyModule_GetDict", (PYTHON_PROC*)&py3_PyModule_GetDict},
533     {"PyList_SetItem", (PYTHON_PROC*)&py3_PyList_SetItem},
534     {"PyDict_GetItemString", (PYTHON_PROC*)&py3_PyDict_GetItemString},
535     {"PyDict_Next", (PYTHON_PROC*)&py3_PyDict_Next},
536     {"PyMapping_Check", (PYTHON_PROC*)&py3_PyMapping_Check},
537     {"PyMapping_Keys", (PYTHON_PROC*)&py3_PyMapping_Keys},
538     {"PyIter_Next", (PYTHON_PROC*)&py3_PyIter_Next},
539     {"PyObject_GetIter", (PYTHON_PROC*)&py3_PyObject_GetIter},
540     {"PyObject_Repr", (PYTHON_PROC*)&py3_PyObject_Repr},
541     {"PyObject_GetItem", (PYTHON_PROC*)&py3_PyObject_GetItem},
542     {"PyObject_IsTrue", (PYTHON_PROC*)&py3_PyObject_IsTrue},
543     {"PyLong_FromLong", (PYTHON_PROC*)&py3_PyLong_FromLong},
544     {"PyDict_New", (PYTHON_PROC*)&py3_PyDict_New},
545 # if PY_VERSION_HEX >= 0x030900b0
546     {"PyType_GetFlags", (PYTHON_PROC*)&py3_PyType_GetFlags},
547 # endif
548     {"PyType_Ready", (PYTHON_PROC*)&py3_PyType_Ready},
549     {"PyDict_SetItemString", (PYTHON_PROC*)&py3_PyDict_SetItemString},
550     {"PyLong_AsLong", (PYTHON_PROC*)&py3_PyLong_AsLong},
551     {"PyErr_SetNone", (PYTHON_PROC*)&py3_PyErr_SetNone},
552     {"PyEval_InitThreads", (PYTHON_PROC*)&py3_PyEval_InitThreads},
553     {"PyEval_RestoreThread", (PYTHON_PROC*)&py3_PyEval_RestoreThread},
554     {"PyEval_SaveThread", (PYTHON_PROC*)&py3_PyEval_SaveThread},
555     {"_PyArg_Parse_SizeT", (PYTHON_PROC*)&py3_PyArg_Parse},
556     {"Py_IsInitialized", (PYTHON_PROC*)&py3_Py_IsInitialized},
557     {"_PyObject_NextNotImplemented", (PYTHON_PROC*)&py3__PyObject_NextNotImplemented},
558     {"_Py_NoneStruct", (PYTHON_PROC*)&py3__Py_NoneStruct},
559     {"_Py_FalseStruct", (PYTHON_PROC*)&py3__Py_FalseStruct},
560     {"_Py_TrueStruct", (PYTHON_PROC*)&py3__Py_TrueStruct},
561     {"PyErr_Clear", (PYTHON_PROC*)&py3_PyErr_Clear},
562     {"PyErr_Format", (PYTHON_PROC*)&py3_PyErr_Format},
563     {"PyErr_PrintEx", (PYTHON_PROC*)&py3_PyErr_PrintEx},
564     {"PyObject_Init", (PYTHON_PROC*)&py3__PyObject_Init},
565     {"PyModule_AddObject", (PYTHON_PROC*)&py3_PyModule_AddObject},
566     {"PyImport_AppendInittab", (PYTHON_PROC*)&py3_PyImport_AppendInittab},
567 # if PY_VERSION_HEX >= 0x030300f0
568     {"PyUnicode_AsUTF8", (PYTHON_PROC*)&py3_PyUnicode_AsUTF8},
569 # else
570     {"_PyUnicode_AsString", (PYTHON_PROC*)&py3__PyUnicode_AsString},
571 # endif
572 # ifndef Py_UNICODE_USE_UCS_FUNCTIONS
573     {"PyUnicode_FromFormat", (PYTHON_PROC*)&py3_PyUnicode_FromFormat},
574 # else
575 #  ifdef Py_UNICODE_WIDE
576     {"PyUnicodeUCS4_FromFormat", (PYTHON_PROC*)&py3_PyUnicodeUCS4_FromFormat},
577 #  else
578     {"PyUnicodeUCS2_FromFormat", (PYTHON_PROC*)&py3_PyUnicodeUCS2_FromFormat},
579 #  endif
580 # endif
581     {"PyBytes_AsString", (PYTHON_PROC*)&py3_PyBytes_AsString},
582     {"PyBytes_AsStringAndSize", (PYTHON_PROC*)&py3_PyBytes_AsStringAndSize},
583     {"PyBytes_FromString", (PYTHON_PROC*)&py3_PyBytes_FromString},
584     {"PyBytes_FromStringAndSize", (PYTHON_PROC*)&py3_PyBytes_FromStringAndSize},
585 # if defined(Py_DEBUG) || PY_VERSION_HEX >= 0x030900b0
586     {"_Py_Dealloc", (PYTHON_PROC*)&py3__Py_Dealloc},
587 # endif
588 # if PY_VERSION_HEX >= 0x030900b0
589     {"_PyObject_New", (PYTHON_PROC*)&py3__PyObject_New},
590 # endif
591     {"PyFloat_FromDouble", (PYTHON_PROC*)&py3_PyFloat_FromDouble},
592     {"PyFloat_AsDouble", (PYTHON_PROC*)&py3_PyFloat_AsDouble},
593     {"PyObject_GenericGetAttr", (PYTHON_PROC*)&py3_PyObject_GenericGetAttr},
594     {"PyType_GenericAlloc", (PYTHON_PROC*)&py3_PyType_GenericAlloc},
595     {"PyType_GenericNew", (PYTHON_PROC*)&py3_PyType_GenericNew},
596     {"PyType_Type", (PYTHON_PROC*)&py3_PyType_Type},
597     {"PyStdPrinter_Type", (PYTHON_PROC*)&py3_PyStdPrinter_Type},
598     {"PySlice_Type", (PYTHON_PROC*)&py3_PySlice_Type},
599     {"PyFloat_Type", (PYTHON_PROC*)&py3_PyFloat_Type},
600     {"PyBool_Type", (PYTHON_PROC*)&py3_PyBool_Type},
601     {"PyNumber_Check", (PYTHON_PROC*)&py3_PyNumber_Check},
602     {"PyNumber_Long", (PYTHON_PROC*)&py3_PyNumber_Long},
603     {"PyErr_NewException", (PYTHON_PROC*)&py3_PyErr_NewException},
604 # ifdef Py_DEBUG
605     {"_Py_NegativeRefcount", (PYTHON_PROC*)&py3__Py_NegativeRefcount},
606     {"_Py_RefTotal", (PYTHON_PROC*)&py3__Py_RefTotal},
607     {"PyModule_Create2TraceRefs", (PYTHON_PROC*)&py3_PyModule_Create2TraceRefs},
608 # else
609     {"PyModule_Create2", (PYTHON_PROC*)&py3_PyModule_Create2},
610 # endif
611 # if defined(Py_DEBUG) && !defined(Py_DEBUG_NO_PYMALLOC)
612     {"_PyObject_DebugFree", (PYTHON_PROC*)&py3__PyObject_DebugFree},
613     {"_PyObject_DebugMalloc", (PYTHON_PROC*)&py3__PyObject_DebugMalloc},
614 # else
615     {"PyObject_Malloc", (PYTHON_PROC*)&py3_PyObject_Malloc},
616     {"PyObject_Free", (PYTHON_PROC*)&py3_PyObject_Free},
617 # endif
618     {"_PyObject_GC_New", (PYTHON_PROC*)&py3__PyObject_GC_New},
619     {"PyObject_GC_Del", (PYTHON_PROC*)&py3_PyObject_GC_Del},
620     {"PyObject_GC_UnTrack", (PYTHON_PROC*)&py3_PyObject_GC_UnTrack},
621     {"PyType_IsSubtype", (PYTHON_PROC*)&py3_PyType_IsSubtype},
622     {"PyCapsule_New", (PYTHON_PROC*)&py3_PyCapsule_New},
623     {"PyCapsule_GetPointer", (PYTHON_PROC*)&py3_PyCapsule_GetPointer},
624     {"", NULL},
625 };
626 
627 # if PY_VERSION_HEX >= 0x030800f0
628     static inline void
629 py3__Py_DECREF(const char *filename UNUSED, int lineno UNUSED, PyObject *op)
630 {
631     if (--op->ob_refcnt != 0)
632     {
633 #  ifdef Py_REF_DEBUG
634 	if (op->ob_refcnt < 0)
635 	{
636 	    _Py_NegativeRefcount(filename, lineno, op);
637 	}
638 #  endif
639     }
640     else
641     {
642 	_Py_Dealloc(op);
643     }
644 }
645 
646 #  undef Py_DECREF
647 #  define Py_DECREF(op) py3__Py_DECREF(__FILE__, __LINE__, _PyObject_CAST(op))
648 
649     static inline void
650 py3__Py_XDECREF(PyObject *op)
651 {
652     if (op != NULL)
653     {
654 	Py_DECREF(op);
655     }
656 }
657 
658 #  undef Py_XDECREF
659 #  define Py_XDECREF(op) py3__Py_XDECREF(_PyObject_CAST(op))
660 # endif
661 
662 # if PY_VERSION_HEX >= 0x030900b0
663     static inline int
664 py3_PyType_HasFeature(PyTypeObject *type, unsigned long feature)
665 {
666     return ((PyType_GetFlags(type) & feature) != 0);
667 }
668 #  define PyType_HasFeature(t,f) py3_PyType_HasFeature(t,f)
669 # endif
670 
671 /*
672  * Load library and get all pointers.
673  * Parameter 'libname' provides name of DLL.
674  * Return OK or FAIL.
675  */
676     static int
677 py3_runtime_link_init(char *libname, int verbose)
678 {
679     int i;
680     PYTHON_PROC *ucs_from_string = (PYTHON_PROC *)&py3_PyUnicode_FromString;
681     PYTHON_PROC *ucs_decode = (PYTHON_PROC *)&py3_PyUnicode_Decode;
682     PYTHON_PROC *ucs_as_encoded_string =
683 				 (PYTHON_PROC *)&py3_PyUnicode_AsEncodedString;
684 
685 # if !(defined(PY_NO_RTLD_GLOBAL) && defined(PY3_NO_RTLD_GLOBAL)) && defined(UNIX) && defined(FEAT_PYTHON)
686     // Can't have Python and Python3 loaded at the same time.
687     // It cause a crash, because RTLD_GLOBAL is needed for
688     // standard C extension libraries of one or both python versions.
689     if (python_loaded())
690     {
691 	if (verbose)
692 	    emsg(_("E837: This Vim cannot execute :py3 after using :python"));
693 	return FAIL;
694     }
695 # endif
696 
697     if (hinstPy3 != 0)
698 	return OK;
699     hinstPy3 = load_dll(libname);
700 
701     if (!hinstPy3)
702     {
703 	if (verbose)
704 	    semsg(_(e_loadlib), libname);
705 	return FAIL;
706     }
707 
708     for (i = 0; py3_funcname_table[i].ptr; ++i)
709     {
710 	if ((*py3_funcname_table[i].ptr = symbol_from_dll(hinstPy3,
711 			py3_funcname_table[i].name)) == NULL)
712 	{
713 	    close_dll(hinstPy3);
714 	    hinstPy3 = 0;
715 	    if (verbose)
716 		semsg(_(e_loadfunc), py3_funcname_table[i].name);
717 	    return FAIL;
718 	}
719     }
720 
721     // Load unicode functions separately as only the ucs2 or the ucs4 functions
722     // will be present in the library.
723 # if PY_VERSION_HEX >= 0x030300f0
724     *ucs_from_string = symbol_from_dll(hinstPy3, "PyUnicode_FromString");
725     *ucs_decode = symbol_from_dll(hinstPy3, "PyUnicode_Decode");
726     *ucs_as_encoded_string = symbol_from_dll(hinstPy3,
727 	    "PyUnicode_AsEncodedString");
728 # else
729     *ucs_from_string = symbol_from_dll(hinstPy3, "PyUnicodeUCS2_FromString");
730     *ucs_decode = symbol_from_dll(hinstPy3,
731 	    "PyUnicodeUCS2_Decode");
732     *ucs_as_encoded_string = symbol_from_dll(hinstPy3,
733 	    "PyUnicodeUCS2_AsEncodedString");
734     if (*ucs_from_string == NULL || *ucs_decode == NULL
735 					     || *ucs_as_encoded_string == NULL)
736     {
737 	*ucs_from_string = symbol_from_dll(hinstPy3,
738 		"PyUnicodeUCS4_FromString");
739 	*ucs_decode = symbol_from_dll(hinstPy3,
740 		"PyUnicodeUCS4_Decode");
741 	*ucs_as_encoded_string = symbol_from_dll(hinstPy3,
742 		"PyUnicodeUCS4_AsEncodedString");
743     }
744 # endif
745     if (*ucs_from_string == NULL || *ucs_decode == NULL
746 					     || *ucs_as_encoded_string == NULL)
747     {
748 	close_dll(hinstPy3);
749 	hinstPy3 = 0;
750 	if (verbose)
751 	    semsg(_(e_loadfunc), "PyUnicode_UCSX_*");
752 	return FAIL;
753     }
754 
755     return OK;
756 }
757 
758 /*
759  * If python is enabled (there is installed python on Windows system) return
760  * TRUE, else FALSE.
761  */
762     int
763 python3_enabled(int verbose)
764 {
765     return py3_runtime_link_init((char *)p_py3dll, verbose) == OK;
766 }
767 
768 /*
769  * Load the standard Python exceptions - don't import the symbols from the
770  * DLL, as this can cause errors (importing data symbols is not reliable).
771  */
772     static void
773 get_py3_exceptions(void)
774 {
775     PyObject *exmod = PyImport_ImportModule("builtins");
776     PyObject *exdict = PyModule_GetDict(exmod);
777     p3imp_PyExc_AttributeError = PyDict_GetItemString(exdict, "AttributeError");
778     p3imp_PyExc_IndexError = PyDict_GetItemString(exdict, "IndexError");
779     p3imp_PyExc_KeyError = PyDict_GetItemString(exdict, "KeyError");
780     p3imp_PyExc_KeyboardInterrupt = PyDict_GetItemString(exdict, "KeyboardInterrupt");
781     p3imp_PyExc_TypeError = PyDict_GetItemString(exdict, "TypeError");
782     p3imp_PyExc_ValueError = PyDict_GetItemString(exdict, "ValueError");
783     p3imp_PyExc_SystemExit = PyDict_GetItemString(exdict, "SystemExit");
784     p3imp_PyExc_RuntimeError = PyDict_GetItemString(exdict, "RuntimeError");
785     p3imp_PyExc_ImportError = PyDict_GetItemString(exdict, "ImportError");
786     p3imp_PyExc_OverflowError = PyDict_GetItemString(exdict, "OverflowError");
787     Py_XINCREF(p3imp_PyExc_AttributeError);
788     Py_XINCREF(p3imp_PyExc_IndexError);
789     Py_XINCREF(p3imp_PyExc_KeyError);
790     Py_XINCREF(p3imp_PyExc_KeyboardInterrupt);
791     Py_XINCREF(p3imp_PyExc_TypeError);
792     Py_XINCREF(p3imp_PyExc_ValueError);
793     Py_XINCREF(p3imp_PyExc_SystemExit);
794     Py_XINCREF(p3imp_PyExc_RuntimeError);
795     Py_XINCREF(p3imp_PyExc_ImportError);
796     Py_XINCREF(p3imp_PyExc_OverflowError);
797     Py_XDECREF(exmod);
798 }
799 #endif // DYNAMIC_PYTHON3
800 
801 static int py3initialised = 0;
802 #define PYINITIALISED py3initialised
803 static int python_end_called = FALSE;
804 
805 #define DESTRUCTOR_FINISH(self) Py_TYPE(self)->tp_free((PyObject*)self)
806 
807 #define WIN_PYTHON_REF(win) win->w_python3_ref
808 #define BUF_PYTHON_REF(buf) buf->b_python3_ref
809 #define TAB_PYTHON_REF(tab) tab->tp_python3_ref
810 
811     static void
812 call_PyObject_Free(void *p)
813 {
814 #if defined(Py_DEBUG) && !defined(Py_DEBUG_NO_PYMALLOC)
815     _PyObject_DebugFree(p);
816 #else
817     PyObject_Free(p);
818 #endif
819 }
820 
821     static PyObject *
822 call_PyType_GenericNew(PyTypeObject *type, PyObject *args, PyObject *kwds)
823 {
824     return PyType_GenericNew(type,args,kwds);
825 }
826 
827     static PyObject *
828 call_PyType_GenericAlloc(PyTypeObject *type, Py_ssize_t nitems)
829 {
830     return PyType_GenericAlloc(type,nitems);
831 }
832 
833 static PyObject *OutputGetattro(PyObject *, PyObject *);
834 static int OutputSetattro(PyObject *, PyObject *, PyObject *);
835 static PyObject *BufferGetattro(PyObject *, PyObject *);
836 static int BufferSetattro(PyObject *, PyObject *, PyObject *);
837 static PyObject *TabPageGetattro(PyObject *, PyObject *);
838 static PyObject *WindowGetattro(PyObject *, PyObject *);
839 static int WindowSetattro(PyObject *, PyObject *, PyObject *);
840 static PyObject *RangeGetattro(PyObject *, PyObject *);
841 static PyObject *CurrentGetattro(PyObject *, PyObject *);
842 static int CurrentSetattro(PyObject *, PyObject *, PyObject *);
843 static PyObject *DictionaryGetattro(PyObject *, PyObject *);
844 static int DictionarySetattro(PyObject *, PyObject *, PyObject *);
845 static PyObject *ListGetattro(PyObject *, PyObject *);
846 static int ListSetattro(PyObject *, PyObject *, PyObject *);
847 static PyObject *FunctionGetattro(PyObject *, PyObject *);
848 
849 static struct PyModuleDef vimmodule;
850 
851 #define PY_CAN_RECURSE
852 
853 /*
854  * Include the code shared with if_python.c
855  */
856 #include "if_py_both.h"
857 
858 // NOTE: Must always be used at the start of a block, since it declares "name".
859 #define GET_ATTR_STRING(name, nameobj) \
860     char	*name = ""; \
861     if (PyUnicode_Check(nameobj)) \
862 	name = (char *)_PyUnicode_AsString(nameobj)
863 
864 #define PY3OBJ_DELETED(obj) (obj->ob_base.ob_refcnt<=0)
865 
866 ///////////////////////////////////////////////////////
867 // Internal function prototypes.
868 
869 static PyObject *Py3Init_vim(void);
870 
871 ///////////////////////////////////////////////////////
872 // 1. Python interpreter main program.
873 
874     void
875 python3_end(void)
876 {
877     static int recurse = 0;
878 
879     // If a crash occurs while doing this, don't try again.
880     if (recurse != 0)
881 	return;
882 
883     python_end_called = TRUE;
884     ++recurse;
885 
886 #ifdef DYNAMIC_PYTHON3
887     if (hinstPy3)
888 #endif
889     if (Py_IsInitialized())
890     {
891 	// acquire lock before finalizing
892 	PyGILState_Ensure();
893 
894 	Py_Finalize();
895     }
896 
897     --recurse;
898 }
899 
900 #if (defined(DYNAMIC_PYTHON3) && defined(DYNAMIC_PYTHON) && defined(FEAT_PYTHON) && defined(UNIX)) || defined(PROTO)
901     int
902 python3_loaded(void)
903 {
904     return (hinstPy3 != 0);
905 }
906 #endif
907 
908 static wchar_t *py_home_buf = NULL;
909 
910 #if defined(MSWIN) && (PY_VERSION_HEX >= 0x030500f0)
911 /*
912  * Return TRUE if stdin is readable from Python 3.
913  */
914     static BOOL
915 is_stdin_readable(void)
916 {
917     DWORD	    mode, eventnum;
918     struct _stat    st;
919     int		    fd = fileno(stdin);
920     HANDLE	    hstdin = (HANDLE)_get_osfhandle(fd);
921 
922     // Check if stdin is connected to the console.
923     if (GetConsoleMode(hstdin, &mode))
924 	// Check if it is opened as input.
925 	return GetNumberOfConsoleInputEvents(hstdin, &eventnum);
926 
927     return _fstat(fd, &st) == 0;
928 }
929 
930 // Python 3.5 or later will abort inside Py_Initialize() when stdin has
931 // been closed (i.e. executed by "vim -").  Reconnect stdin to CONIN$.
932 // Note that the python DLL is linked to its own stdio DLL which can be
933 // differ from Vim's stdio.
934     static void
935 reset_stdin(void)
936 {
937     FILE *(*py__acrt_iob_func)(unsigned) = NULL;
938     FILE *(*pyfreopen)(const char *, const char *, FILE *) = NULL;
939     HINSTANCE hinst;
940 
941 # ifdef DYNAMIC_PYTHON3
942     hinst = hinstPy3;
943 # else
944     hinst = GetModuleHandle(PYTHON3_DLL);
945 # endif
946     if (hinst == NULL || is_stdin_readable())
947 	return;
948 
949     // Get "freopen" and "stdin" which are used in the python DLL.
950     // "stdin" is defined as "__acrt_iob_func(0)" in VC++ 2015 or later.
951     py__acrt_iob_func = get_dll_import_func(hinst, "__acrt_iob_func");
952     if (py__acrt_iob_func)
953     {
954 	HINSTANCE hpystdiodll = find_imported_module_by_funcname(hinst,
955 							    "__acrt_iob_func");
956 	if (hpystdiodll)
957 	    pyfreopen = (void *)GetProcAddress(hpystdiodll, "freopen");
958     }
959 
960     // Reconnect stdin to CONIN$.
961     if (pyfreopen != NULL)
962 	pyfreopen("CONIN$", "r", py__acrt_iob_func(0));
963     else
964 	freopen("CONIN$", "r", stdin);
965 }
966 #else
967 # define reset_stdin()
968 #endif
969 
970     static int
971 Python3_Init(void)
972 {
973     if (!py3initialised)
974     {
975 #ifdef DYNAMIC_PYTHON3
976 	if (!python3_enabled(TRUE))
977 	{
978 	    emsg(_("E263: Sorry, this command is disabled, the Python library could not be loaded."));
979 	    goto fail;
980 	}
981 #endif
982 
983 	init_structs();
984 
985 	if (*p_py3home != NUL)
986 	{
987 	    size_t len = mbstowcs(NULL, (char *)p_py3home, 0) + 1;
988 
989 	    // The string must not change later, make a copy in static memory.
990 	    py_home_buf = ALLOC_MULT(wchar_t, len);
991 	    if (py_home_buf != NULL && mbstowcs(
992 			    py_home_buf, (char *)p_py3home, len) != (size_t)-1)
993 		Py_SetPythonHome(py_home_buf);
994 	}
995 #ifdef PYTHON3_HOME
996 	else if (mch_getenv((char_u *)"PYTHONHOME") == NULL)
997 	    Py_SetPythonHome(PYTHON3_HOME);
998 #endif
999 
1000 	PyImport_AppendInittab("vim", Py3Init_vim);
1001 
1002 	reset_stdin();
1003 	Py_Initialize();
1004 
1005 #if PY_VERSION_HEX < 0x03090000
1006 	// Initialise threads.  This is deprecated since Python 3.9.
1007 	PyEval_InitThreads();
1008 #endif
1009 #ifdef DYNAMIC_PYTHON3
1010 	get_py3_exceptions();
1011 #endif
1012 
1013 	if (PythonIO_Init_io())
1014 	    goto fail;
1015 
1016 	globals = PyModule_GetDict(PyImport_AddModule("__main__"));
1017 
1018 	// Remove the element from sys.path that was added because of our
1019 	// argv[0] value in Py3Init_vim().  Previously we used an empty
1020 	// string, but depending on the OS we then get an empty entry or
1021 	// the current directory in sys.path.
1022 	// Only after vim has been imported, the element does exist in
1023 	// sys.path.
1024 	PyRun_SimpleString("import vim; import sys; sys.path = list(filter(lambda x: not x.endswith('must>not&exist'), sys.path))");
1025 
1026 	// Without the call to PyEval_SaveThread, thread specific state (such
1027 	// as the system trace hook), will be lost between invocations of
1028 	// Python code.
1029 	// GIL may have been created and acquired in PyEval_InitThreads() and
1030 	// thread state is created in Py_Initialize(); there
1031 	// _PyGILState_NoteThreadState() also sets gilcounter to 1 (python must
1032 	// have threads enabled!), so the following does both: unlock GIL and
1033 	// save thread state in TLS without deleting thread state
1034 	PyEval_SaveThread();
1035 
1036 	py3initialised = 1;
1037     }
1038 
1039     return 0;
1040 
1041 fail:
1042     // We call PythonIO_Flush() here to print any Python errors.
1043     // This is OK, as it is possible to call this function even
1044     // if PythonIO_Init_io() has not completed successfully (it will
1045     // not do anything in this case).
1046     PythonIO_Flush();
1047     return -1;
1048 }
1049 
1050 /*
1051  * External interface
1052  */
1053     static void
1054 DoPyCommand(const char *cmd, rangeinitializer init_range, runner run, void *arg)
1055 {
1056 #if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
1057     char		*saved_locale;
1058 #endif
1059     PyObject		*cmdstr;
1060     PyObject		*cmdbytes;
1061     PyGILState_STATE	pygilstate;
1062 
1063     if (python_end_called)
1064 	goto theend;
1065 
1066     if (Python3_Init())
1067 	goto theend;
1068 
1069     init_range(arg);
1070 
1071     Python_Release_Vim();	    // leave Vim
1072 
1073 #if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
1074     // Python only works properly when the LC_NUMERIC locale is "C".
1075     saved_locale = setlocale(LC_NUMERIC, NULL);
1076     if (saved_locale == NULL || STRCMP(saved_locale, "C") == 0)
1077 	saved_locale = NULL;
1078     else
1079     {
1080 	// Need to make a copy, value may change when setting new locale.
1081 	saved_locale = (char *)vim_strsave((char_u *)saved_locale);
1082 	(void)setlocale(LC_NUMERIC, "C");
1083     }
1084 #endif
1085 
1086     pygilstate = PyGILState_Ensure();
1087 
1088     // PyRun_SimpleString expects a UTF-8 string. Wrong encoding may cause
1089     // SyntaxError (unicode error).
1090     cmdstr = PyUnicode_Decode(cmd, strlen(cmd),
1091 					(char *)ENC_OPT, CODEC_ERROR_HANDLER);
1092     cmdbytes = PyUnicode_AsEncodedString(cmdstr, "utf-8", CODEC_ERROR_HANDLER);
1093     Py_XDECREF(cmdstr);
1094 
1095     run(PyBytes_AsString(cmdbytes), arg, &pygilstate);
1096     Py_XDECREF(cmdbytes);
1097 
1098     PyGILState_Release(pygilstate);
1099 
1100 #if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
1101     if (saved_locale != NULL)
1102     {
1103 	(void)setlocale(LC_NUMERIC, saved_locale);
1104 	vim_free(saved_locale);
1105     }
1106 #endif
1107 
1108     Python_Lock_Vim();		    // enter Vim
1109     PythonIO_Flush();
1110 
1111 theend:
1112     return;	    // keeps lint happy
1113 }
1114 
1115 /*
1116  * ":py3"
1117  */
1118     void
1119 ex_py3(exarg_T *eap)
1120 {
1121     char_u *script;
1122 
1123     script = script_get(eap, eap->arg);
1124     if (!eap->skip)
1125     {
1126 	if (p_pyx == 0)
1127 	    p_pyx = 3;
1128 
1129 	DoPyCommand(script == NULL ? (char *) eap->arg : (char *) script,
1130 		(rangeinitializer) init_range_cmd,
1131 		(runner) run_cmd,
1132 		(void *) eap);
1133     }
1134     vim_free(script);
1135 }
1136 
1137 #define BUFFER_SIZE 2048
1138 
1139 /*
1140  * ":py3file"
1141  */
1142     void
1143 ex_py3file(exarg_T *eap)
1144 {
1145     static char buffer[BUFFER_SIZE];
1146     const char *file;
1147     char *p;
1148     int i;
1149 
1150     if (p_pyx == 0)
1151 	p_pyx = 3;
1152 
1153     // Have to do it like this. PyRun_SimpleFile requires you to pass a
1154     // stdio file pointer, but Vim and the Python DLL are compiled with
1155     // different options under Windows, meaning that stdio pointers aren't
1156     // compatible between the two. Yuk.
1157     //
1158     // construct: exec(compile(open('a_filename', 'rb').read(), 'a_filename', 'exec'))
1159     //
1160     // Using bytes so that Python can detect the source encoding as it normally
1161     // does. The doc does not say "compile" accept bytes, though.
1162     //
1163     // We need to escape any backslashes or single quotes in the file name, so that
1164     // Python won't mangle the file name.
1165 
1166     strcpy(buffer, "exec(compile(open('");
1167     p = buffer + 19; // size of "exec(compile(open('"
1168 
1169     for (i=0; i<2; ++i)
1170     {
1171 	file = (char *)eap->arg;
1172 	while (*file && p < buffer + (BUFFER_SIZE - 3))
1173 	{
1174 	    if (*file == '\\' || *file == '\'')
1175 		*p++ = '\\';
1176 	    *p++ = *file++;
1177 	}
1178 	// If we didn't finish the file name, we hit a buffer overflow
1179 	if (*file != '\0')
1180 	    return;
1181 	if (i==0)
1182 	{
1183 	    strcpy(p,"','rb').read(),'");
1184 	    p += 16;
1185 	}
1186 	else
1187 	{
1188 	    strcpy(p,"','exec'))");
1189 	    p += 10;
1190 	}
1191     }
1192 
1193 
1194     // Execute the file
1195     DoPyCommand(buffer,
1196 	    (rangeinitializer) init_range_cmd,
1197 	    (runner) run_cmd,
1198 	    (void *) eap);
1199 }
1200 
1201     void
1202 ex_py3do(exarg_T *eap)
1203 {
1204     if (p_pyx == 0)
1205 	p_pyx = 3;
1206 
1207     DoPyCommand((char *)eap->arg,
1208 	    (rangeinitializer)init_range_cmd,
1209 	    (runner)run_do,
1210 	    (void *)eap);
1211 }
1212 
1213 ///////////////////////////////////////////////////////
1214 // 2. Python output stream: writes output via [e]msg().
1215 
1216 // Implementation functions
1217 
1218     static PyObject *
1219 OutputGetattro(PyObject *self, PyObject *nameobj)
1220 {
1221     GET_ATTR_STRING(name, nameobj);
1222 
1223     if (strcmp(name, "softspace") == 0)
1224 	return PyLong_FromLong(((OutputObject *)(self))->softspace);
1225     else if (strcmp(name, "errors") == 0)
1226 	return PyString_FromString("strict");
1227     else if (strcmp(name, "encoding") == 0)
1228 	return PyString_FromString(ENC_OPT);
1229 
1230     return PyObject_GenericGetAttr(self, nameobj);
1231 }
1232 
1233     static int
1234 OutputSetattro(PyObject *self, PyObject *nameobj, PyObject *val)
1235 {
1236     GET_ATTR_STRING(name, nameobj);
1237 
1238     return OutputSetattr((OutputObject *)(self), name, val);
1239 }
1240 
1241 ///////////////////////////////////////////////////////
1242 // 3. Implementation of the Vim module for Python
1243 
1244 // Window type - Implementation functions
1245 // --------------------------------------
1246 
1247 #define WindowType_Check(obj) ((obj)->ob_base.ob_type == &WindowType)
1248 
1249 // Buffer type - Implementation functions
1250 // --------------------------------------
1251 
1252 #define BufferType_Check(obj) ((obj)->ob_base.ob_type == &BufferType)
1253 
1254 static PyObject* BufferSubscript(PyObject *self, PyObject *idx);
1255 static int BufferAsSubscript(PyObject *self, PyObject *idx, PyObject *val);
1256 
1257 // Line range type - Implementation functions
1258 // --------------------------------------
1259 
1260 #define RangeType_Check(obj) ((obj)->ob_base.ob_type == &RangeType)
1261 
1262 static PyObject* RangeSubscript(PyObject *self, PyObject *idx);
1263 static int RangeAsItem(PyObject *, Py_ssize_t, PyObject *);
1264 static int RangeAsSubscript(PyObject *self, PyObject *idx, PyObject *val);
1265 
1266 // Current objects type - Implementation functions
1267 // -----------------------------------------------
1268 
1269 static PySequenceMethods BufferAsSeq = {
1270     (lenfunc)		BufferLength,	    // sq_length,    len(x)
1271     (binaryfunc)	0,		    // sq_concat,    x+y
1272     (ssizeargfunc)	0,		    // sq_repeat,    x*n
1273     (ssizeargfunc)	BufferItem,	    // sq_item,      x[i]
1274     0,					    // was_sq_slice,	 x[i:j]
1275     0,					    // sq_ass_item,  x[i]=v
1276     0,					    // sq_ass_slice, x[i:j]=v
1277     0,					    // sq_contains
1278     0,					    // sq_inplace_concat
1279     0,					    // sq_inplace_repeat
1280 };
1281 
1282 static PyMappingMethods BufferAsMapping = {
1283     /* mp_length	*/ (lenfunc)BufferLength,
1284     /* mp_subscript     */ (binaryfunc)BufferSubscript,
1285     /* mp_ass_subscript */ (objobjargproc)BufferAsSubscript,
1286 };
1287 
1288 
1289 // Buffer object
1290 
1291     static PyObject *
1292 BufferGetattro(PyObject *self, PyObject *nameobj)
1293 {
1294     PyObject *r;
1295 
1296     GET_ATTR_STRING(name, nameobj);
1297 
1298     if ((r = BufferAttrValid((BufferObject *)(self), name)))
1299 	return r;
1300 
1301     if (CheckBuffer((BufferObject *)(self)))
1302 	return NULL;
1303 
1304     r = BufferAttr((BufferObject *)(self), name);
1305     if (r || PyErr_Occurred())
1306 	return r;
1307     else
1308 	return PyObject_GenericGetAttr(self, nameobj);
1309 }
1310 
1311     static int
1312 BufferSetattro(PyObject *self, PyObject *nameobj, PyObject *val)
1313 {
1314     GET_ATTR_STRING(name, nameobj);
1315 
1316     return BufferSetattr((BufferObject *)(self), name, val);
1317 }
1318 
1319 //////////////////
1320 
1321     static PyObject *
1322 BufferSubscript(PyObject *self, PyObject* idx)
1323 {
1324     if (PyLong_Check(idx))
1325     {
1326 	long _idx = PyLong_AsLong(idx);
1327 	return BufferItem((BufferObject *)(self), _idx);
1328     } else if (PySlice_Check(idx))
1329     {
1330 	Py_ssize_t start, stop, step, slicelen;
1331 
1332 	if (CheckBuffer((BufferObject *) self))
1333 	    return NULL;
1334 
1335 	if (PySlice_GetIndicesEx((PySliceObject_T *)idx,
1336 	      (Py_ssize_t)((BufferObject *)(self))->buf->b_ml.ml_line_count,
1337 	      &start, &stop,
1338 	      &step, &slicelen) < 0)
1339 	    return NULL;
1340 	return BufferSlice((BufferObject *)(self), start, stop);
1341     }
1342     else
1343     {
1344 	RAISE_INVALID_INDEX_TYPE(idx);
1345 	return NULL;
1346     }
1347 }
1348 
1349     static int
1350 BufferAsSubscript(PyObject *self, PyObject* idx, PyObject* val)
1351 {
1352     if (PyLong_Check(idx))
1353     {
1354 	long n = PyLong_AsLong(idx);
1355 
1356 	if (CheckBuffer((BufferObject *) self))
1357 	    return -1;
1358 
1359 	return RBAsItem((BufferObject *)(self), n, val, 1,
1360 		    (Py_ssize_t)((BufferObject *)(self))->buf->b_ml.ml_line_count,
1361 		    NULL);
1362     } else if (PySlice_Check(idx))
1363     {
1364 	Py_ssize_t start, stop, step, slicelen;
1365 
1366 	if (CheckBuffer((BufferObject *) self))
1367 	    return -1;
1368 
1369 	if (PySlice_GetIndicesEx((PySliceObject_T *)idx,
1370 	      (Py_ssize_t)((BufferObject *)(self))->buf->b_ml.ml_line_count,
1371 	      &start, &stop,
1372 	      &step, &slicelen) < 0)
1373 	    return -1;
1374 	return RBAsSlice((BufferObject *)(self), start, stop, val, 1,
1375 			  (PyInt)((BufferObject *)(self))->buf->b_ml.ml_line_count,
1376 			  NULL);
1377     }
1378     else
1379     {
1380 	RAISE_INVALID_INDEX_TYPE(idx);
1381 	return -1;
1382     }
1383 }
1384 
1385 static PySequenceMethods RangeAsSeq = {
1386     (lenfunc)		RangeLength,	 // sq_length,	  len(x)
1387     (binaryfunc)	0,		 // RangeConcat, sq_concat,  x+y
1388     (ssizeargfunc)	0,		 // RangeRepeat, sq_repeat,  x*n
1389     (ssizeargfunc)	RangeItem,	 // sq_item,	  x[i]
1390     0,					 // was_sq_slice,     x[i:j]
1391     (ssizeobjargproc)	RangeAsItem,	 // sq_as_item,  x[i]=v
1392     0,					 // sq_ass_slice, x[i:j]=v
1393     0,					 // sq_contains
1394     0,					 // sq_inplace_concat
1395     0,					 // sq_inplace_repeat
1396 };
1397 
1398 static PyMappingMethods RangeAsMapping = {
1399     /* mp_length	*/ (lenfunc)RangeLength,
1400     /* mp_subscript     */ (binaryfunc)RangeSubscript,
1401     /* mp_ass_subscript */ (objobjargproc)RangeAsSubscript,
1402 };
1403 
1404 // Line range object - Implementation
1405 
1406     static PyObject *
1407 RangeGetattro(PyObject *self, PyObject *nameobj)
1408 {
1409     GET_ATTR_STRING(name, nameobj);
1410 
1411     if (strcmp(name, "start") == 0)
1412 	return Py_BuildValue("n", ((RangeObject *)(self))->start - 1);
1413     else if (strcmp(name, "end") == 0)
1414 	return Py_BuildValue("n", ((RangeObject *)(self))->end - 1);
1415     else
1416 	return PyObject_GenericGetAttr(self, nameobj);
1417 }
1418 
1419 ////////////////
1420 
1421     static int
1422 RangeAsItem(PyObject *self, Py_ssize_t n, PyObject *val)
1423 {
1424     return RBAsItem(((RangeObject *)(self))->buf, n, val,
1425 		    ((RangeObject *)(self))->start,
1426 		    ((RangeObject *)(self))->end,
1427 		    &((RangeObject *)(self))->end);
1428 }
1429 
1430     static Py_ssize_t
1431 RangeAsSlice(PyObject *self, Py_ssize_t lo, Py_ssize_t hi, PyObject *val)
1432 {
1433     return RBAsSlice(((RangeObject *)(self))->buf, lo, hi, val,
1434 		    ((RangeObject *)(self))->start,
1435 		    ((RangeObject *)(self))->end,
1436 		    &((RangeObject *)(self))->end);
1437 }
1438 
1439     static PyObject *
1440 RangeSubscript(PyObject *self, PyObject* idx)
1441 {
1442     if (PyLong_Check(idx))
1443     {
1444 	long _idx = PyLong_AsLong(idx);
1445 	return RangeItem((RangeObject *)(self), _idx);
1446     } else if (PySlice_Check(idx))
1447     {
1448 	Py_ssize_t start, stop, step, slicelen;
1449 
1450 	if (PySlice_GetIndicesEx((PySliceObject_T *)idx,
1451 		((RangeObject *)(self))->end-((RangeObject *)(self))->start+1,
1452 		&start, &stop,
1453 		&step, &slicelen) < 0)
1454 	    return NULL;
1455 	return RangeSlice((RangeObject *)(self), start, stop);
1456     }
1457     else
1458     {
1459 	RAISE_INVALID_INDEX_TYPE(idx);
1460 	return NULL;
1461     }
1462 }
1463 
1464     static int
1465 RangeAsSubscript(PyObject *self, PyObject *idx, PyObject *val)
1466 {
1467     if (PyLong_Check(idx))
1468     {
1469 	long n = PyLong_AsLong(idx);
1470 	return RangeAsItem(self, n, val);
1471     }
1472     else if (PySlice_Check(idx))
1473     {
1474 	Py_ssize_t start, stop, step, slicelen;
1475 
1476 	if (PySlice_GetIndicesEx((PySliceObject_T *)idx,
1477 		((RangeObject *)(self))->end-((RangeObject *)(self))->start+1,
1478 		&start, &stop,
1479 		&step, &slicelen) < 0)
1480 	    return -1;
1481 	return RangeAsSlice(self, start, stop, val);
1482     }
1483     else
1484     {
1485 	RAISE_INVALID_INDEX_TYPE(idx);
1486 	return -1;
1487     }
1488 }
1489 
1490 // TabPage object - Implementation
1491 
1492     static PyObject *
1493 TabPageGetattro(PyObject *self, PyObject *nameobj)
1494 {
1495     PyObject *r;
1496 
1497     GET_ATTR_STRING(name, nameobj);
1498 
1499     if ((r = TabPageAttrValid((TabPageObject *)(self), name)))
1500 	return r;
1501 
1502     if (CheckTabPage((TabPageObject *)(self)))
1503 	return NULL;
1504 
1505     r = TabPageAttr((TabPageObject *)(self), name);
1506     if (r || PyErr_Occurred())
1507 	return r;
1508     else
1509 	return PyObject_GenericGetAttr(self, nameobj);
1510 }
1511 
1512 // Window object - Implementation
1513 
1514     static PyObject *
1515 WindowGetattro(PyObject *self, PyObject *nameobj)
1516 {
1517     PyObject *r;
1518 
1519     GET_ATTR_STRING(name, nameobj);
1520 
1521     if ((r = WindowAttrValid((WindowObject *)(self), name)))
1522 	return r;
1523 
1524     if (CheckWindow((WindowObject *)(self)))
1525 	return NULL;
1526 
1527     r = WindowAttr((WindowObject *)(self), name);
1528     if (r || PyErr_Occurred())
1529 	return r;
1530     else
1531 	return PyObject_GenericGetAttr(self, nameobj);
1532 }
1533 
1534     static int
1535 WindowSetattro(PyObject *self, PyObject *nameobj, PyObject *val)
1536 {
1537     GET_ATTR_STRING(name, nameobj);
1538 
1539     return WindowSetattr((WindowObject *)(self), name, val);
1540 }
1541 
1542 // Tab page list object - Definitions
1543 
1544 static PySequenceMethods TabListAsSeq = {
1545     (lenfunc)	     TabListLength,	    // sq_length,    len(x)
1546     (binaryfunc)     0,			    // sq_concat,    x+y
1547     (ssizeargfunc)   0,			    // sq_repeat,    x*n
1548     (ssizeargfunc)   TabListItem,	    // sq_item,      x[i]
1549     0,					    // sq_slice,     x[i:j]
1550     (ssizeobjargproc)0,			    // sq_as_item,  x[i]=v
1551     0,					    // sq_ass_slice, x[i:j]=v
1552     0,					    // sq_contains
1553     0,					    // sq_inplace_concat
1554     0,					    // sq_inplace_repeat
1555 };
1556 
1557 // Window list object - Definitions
1558 
1559 static PySequenceMethods WinListAsSeq = {
1560     (lenfunc)	     WinListLength,	    // sq_length,    len(x)
1561     (binaryfunc)     0,			    // sq_concat,    x+y
1562     (ssizeargfunc)   0,			    // sq_repeat,    x*n
1563     (ssizeargfunc)   WinListItem,	    // sq_item,      x[i]
1564     0,					    // sq_slice,     x[i:j]
1565     (ssizeobjargproc)0,			    // sq_as_item,  x[i]=v
1566     0,					    // sq_ass_slice, x[i:j]=v
1567     0,					    // sq_contains
1568     0,					    // sq_inplace_concat
1569     0,					    // sq_inplace_repeat
1570 };
1571 
1572 /*
1573  * Current items object - Implementation
1574  */
1575     static PyObject *
1576 CurrentGetattro(PyObject *self, PyObject *nameobj)
1577 {
1578     PyObject	*r;
1579     GET_ATTR_STRING(name, nameobj);
1580     if (!(r = CurrentGetattr(self, name)))
1581 	return PyObject_GenericGetAttr(self, nameobj);
1582     return r;
1583 }
1584 
1585     static int
1586 CurrentSetattro(PyObject *self, PyObject *nameobj, PyObject *value)
1587 {
1588     GET_ATTR_STRING(name, nameobj);
1589     return CurrentSetattr(self, name, value);
1590 }
1591 
1592 // Dictionary object - Definitions
1593 
1594     static PyObject *
1595 DictionaryGetattro(PyObject *self, PyObject *nameobj)
1596 {
1597     DictionaryObject	*this = ((DictionaryObject *) (self));
1598 
1599     GET_ATTR_STRING(name, nameobj);
1600 
1601     if (strcmp(name, "locked") == 0)
1602 	return PyLong_FromLong(this->dict->dv_lock);
1603     else if (strcmp(name, "scope") == 0)
1604 	return PyLong_FromLong(this->dict->dv_scope);
1605 
1606     return PyObject_GenericGetAttr(self, nameobj);
1607 }
1608 
1609     static int
1610 DictionarySetattro(PyObject *self, PyObject *nameobj, PyObject *val)
1611 {
1612     GET_ATTR_STRING(name, nameobj);
1613     return DictionarySetattr((DictionaryObject *)(self), name, val);
1614 }
1615 
1616 // List object - Definitions
1617 
1618     static PyObject *
1619 ListGetattro(PyObject *self, PyObject *nameobj)
1620 {
1621     GET_ATTR_STRING(name, nameobj);
1622 
1623     if (strcmp(name, "locked") == 0)
1624 	return PyLong_FromLong(((ListObject *) (self))->list->lv_lock);
1625 
1626     return PyObject_GenericGetAttr(self, nameobj);
1627 }
1628 
1629     static int
1630 ListSetattro(PyObject *self, PyObject *nameobj, PyObject *val)
1631 {
1632     GET_ATTR_STRING(name, nameobj);
1633     return ListSetattr((ListObject *)(self), name, val);
1634 }
1635 
1636 // Function object - Definitions
1637 
1638     static PyObject *
1639 FunctionGetattro(PyObject *self, PyObject *nameobj)
1640 {
1641     PyObject		*r;
1642     FunctionObject	*this = (FunctionObject *)(self);
1643 
1644     GET_ATTR_STRING(name, nameobj);
1645 
1646     r = FunctionAttr(this, name);
1647     if (r || PyErr_Occurred())
1648 	return r;
1649     else
1650 	return PyObject_GenericGetAttr(self, nameobj);
1651 }
1652 
1653 // External interface
1654 
1655     void
1656 python3_buffer_free(buf_T *buf)
1657 {
1658     if (BUF_PYTHON_REF(buf) != NULL)
1659     {
1660 	BufferObject *bp = BUF_PYTHON_REF(buf);
1661 	bp->buf = INVALID_BUFFER_VALUE;
1662 	BUF_PYTHON_REF(buf) = NULL;
1663     }
1664 }
1665 
1666     void
1667 python3_window_free(win_T *win)
1668 {
1669     if (WIN_PYTHON_REF(win) != NULL)
1670     {
1671 	WindowObject *wp = WIN_PYTHON_REF(win);
1672 	wp->win = INVALID_WINDOW_VALUE;
1673 	WIN_PYTHON_REF(win) = NULL;
1674     }
1675 }
1676 
1677     void
1678 python3_tabpage_free(tabpage_T *tab)
1679 {
1680     if (TAB_PYTHON_REF(tab) != NULL)
1681     {
1682 	TabPageObject *tp = TAB_PYTHON_REF(tab);
1683 	tp->tab = INVALID_TABPAGE_VALUE;
1684 	TAB_PYTHON_REF(tab) = NULL;
1685     }
1686 }
1687 
1688     static PyObject *
1689 Py3Init_vim(void)
1690 {
1691     // The special value is removed from sys.path in Python3_Init().
1692     static wchar_t *(argv[2]) = {L"/must>not&exist/foo", NULL};
1693 
1694     if (init_types())
1695 	return NULL;
1696 
1697     // Set sys.argv[] to avoid a crash in warn().
1698     PySys_SetArgv(1, argv);
1699 
1700     if ((vim_module = PyModule_Create(&vimmodule)) == NULL)
1701 	return NULL;
1702 
1703     if (populate_module(vim_module))
1704 	return NULL;
1705 
1706     if (init_sys_path())
1707 	return NULL;
1708 
1709     return vim_module;
1710 }
1711 
1712 //////////////////////////////////////////////////////////////////////////
1713 // 4. Utility functions for handling the interface between Vim and Python.
1714 
1715 /*
1716  * Convert a Vim line into a Python string.
1717  * All internal newlines are replaced by null characters.
1718  *
1719  * On errors, the Python exception data is set, and NULL is returned.
1720  */
1721     static PyObject *
1722 LineToString(const char *str)
1723 {
1724     PyObject *result;
1725     Py_ssize_t len = strlen(str);
1726     char *tmp, *p;
1727 
1728     tmp = alloc(len + 1);
1729     p = tmp;
1730     if (p == NULL)
1731     {
1732 	PyErr_NoMemory();
1733 	return NULL;
1734     }
1735 
1736     while (*str)
1737     {
1738 	if (*str == '\n')
1739 	    *p = '\0';
1740 	else
1741 	    *p = *str;
1742 
1743 	++p;
1744 	++str;
1745     }
1746     *p = '\0';
1747 
1748     result = PyUnicode_Decode(tmp, len, (char *)ENC_OPT, CODEC_ERROR_HANDLER);
1749 
1750     vim_free(tmp);
1751     return result;
1752 }
1753 
1754     void
1755 do_py3eval(char_u *str, typval_T *rettv)
1756 {
1757     DoPyCommand((char *) str,
1758 	    (rangeinitializer) init_range_eval,
1759 	    (runner) run_eval,
1760 	    (void *) rettv);
1761     if (rettv->v_type == VAR_UNKNOWN)
1762     {
1763 	rettv->v_type = VAR_NUMBER;
1764 	rettv->vval.v_number = 0;
1765     }
1766 }
1767 
1768     int
1769 set_ref_in_python3(int copyID)
1770 {
1771     return set_ref_in_py(copyID);
1772 }
1773