xref: /vim-8.2.3635/src/if_python3.c (revision 8e9a24a1) 
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  */
29 /* uncomment this if used with the debug version of python, but without its
30  * allocator */
31 /* #define Py_DEBUG_NO_PYMALLOC */
32 
33 #include "vim.h"
34 
35 #include <limits.h>
36 
37 #if defined(MSWIN) && defined(HAVE_FCNTL_H)
38 # undef HAVE_FCNTL_H
39 #endif
40 
41 #ifdef _DEBUG
42 # undef _DEBUG
43 #endif
44 
45 #ifdef F_BLANK
46 # undef F_BLANK
47 #endif
48 
49 #ifdef HAVE_STRFTIME
50 # undef HAVE_STRFTIME
51 #endif
52 #ifdef HAVE_STRING_H
53 # undef HAVE_STRING_H
54 #endif
55 #ifdef HAVE_PUTENV
56 # undef HAVE_PUTENV
57 #endif
58 #ifdef HAVE_STDARG_H
59 # undef HAVE_STDARG_H   /* Python's config.h defines it as well. */
60 #endif
61 #ifdef _POSIX_C_SOURCE  /* defined in feature.h */
62 # undef _POSIX_C_SOURCE
63 #endif
64 #ifdef _XOPEN_SOURCE
65 # undef _XOPEN_SOURCE	/* pyconfig.h defines it as well. */
66 #endif
67 
68 #define PY_SSIZE_T_CLEAN
69 
70 #include <Python.h>
71 
72 #undef main /* Defined in python.h - aargh */
73 #undef HAVE_FCNTL_H /* Clash with os_win32.h */
74 
75 /* The "surrogateescape" error handler is new in Python 3.1 */
76 #if PY_VERSION_HEX >= 0x030100f0
77 # define CODEC_ERROR_HANDLER "surrogateescape"
78 #else
79 # define CODEC_ERROR_HANDLER NULL
80 #endif
81 
82 /* Python 3 does not support CObjects, always use Capsules */
83 #define PY_USE_CAPSULE
84 
85 #define PyInt Py_ssize_t
86 #ifndef PyString_Check
87 # define PyString_Check(obj) PyUnicode_Check(obj)
88 #endif
89 #define PyString_FromString(repr) \
90     PyUnicode_Decode(repr, STRLEN(repr), ENC_OPT, NULL)
91 #define PyString_FromFormat PyUnicode_FromFormat
92 #ifndef PyInt_Check
93 # define PyInt_Check(obj) PyLong_Check(obj)
94 #endif
95 #define PyInt_FromLong(i) PyLong_FromLong(i)
96 #define PyInt_AsLong(obj) PyLong_AsLong(obj)
97 #define Py_ssize_t_fmt "n"
98 #define Py_bytes_fmt "y"
99 
100 #define PyIntArgFunc	ssizeargfunc
101 #define PyIntObjArgProc	ssizeobjargproc
102 
103 /*
104  * PySlice_GetIndicesEx(): first argument type changed from PySliceObject
105  * to PyObject in Python 3.2 or later.
106  */
107 #if PY_VERSION_HEX >= 0x030200f0
108 typedef PyObject PySliceObject_T;
109 #else
110 typedef PySliceObject PySliceObject_T;
111 #endif
112 
113 #if defined(DYNAMIC_PYTHON3) || defined(PROTO)
114 
115 # ifndef MSWIN
116 #  include <dlfcn.h>
117 #  define FARPROC void*
118 #  define HINSTANCE void*
119 #  if defined(PY_NO_RTLD_GLOBAL) && defined(PY3_NO_RTLD_GLOBAL)
120 #   define load_dll(n) dlopen((n), RTLD_LAZY)
121 #  else
122 #   define load_dll(n) dlopen((n), RTLD_LAZY|RTLD_GLOBAL)
123 #  endif
124 #  define close_dll dlclose
125 #  define symbol_from_dll dlsym
126 # else
127 #  define load_dll vimLoadLib
128 #  define close_dll FreeLibrary
129 #  define symbol_from_dll GetProcAddress
130 # endif
131 /*
132  * Wrapper defines
133  */
134 # undef PyArg_Parse
135 # define PyArg_Parse py3_PyArg_Parse
136 # undef PyArg_ParseTuple
137 # define PyArg_ParseTuple py3_PyArg_ParseTuple
138 # define PyMem_Free py3_PyMem_Free
139 # define PyMem_Malloc py3_PyMem_Malloc
140 # define PyDict_SetItemString py3_PyDict_SetItemString
141 # define PyErr_BadArgument py3_PyErr_BadArgument
142 # define PyErr_Clear py3_PyErr_Clear
143 # define PyErr_Format py3_PyErr_Format
144 # define PyErr_PrintEx py3_PyErr_PrintEx
145 # define PyErr_NoMemory py3_PyErr_NoMemory
146 # define PyErr_Occurred py3_PyErr_Occurred
147 # define PyErr_SetNone py3_PyErr_SetNone
148 # define PyErr_SetString py3_PyErr_SetString
149 # define PyErr_SetObject py3_PyErr_SetObject
150 # define PyErr_ExceptionMatches py3_PyErr_ExceptionMatches
151 # define PyEval_InitThreads py3_PyEval_InitThreads
152 # define PyEval_RestoreThread py3_PyEval_RestoreThread
153 # define PyEval_SaveThread py3_PyEval_SaveThread
154 # define PyGILState_Ensure py3_PyGILState_Ensure
155 # define PyGILState_Release py3_PyGILState_Release
156 # define PyLong_AsLong py3_PyLong_AsLong
157 # define PyLong_FromLong py3_PyLong_FromLong
158 # define PyList_GetItem py3_PyList_GetItem
159 # define PyList_Append py3_PyList_Append
160 # define PyList_Insert py3_PyList_Insert
161 # define PyList_New py3_PyList_New
162 # define PyList_SetItem py3_PyList_SetItem
163 # define PyList_Size py3_PyList_Size
164 # define PySequence_Check py3_PySequence_Check
165 # define PySequence_Size py3_PySequence_Size
166 # define PySequence_GetItem py3_PySequence_GetItem
167 # define PySequence_Fast py3_PySequence_Fast
168 # define PyTuple_Size py3_PyTuple_Size
169 # define PyTuple_GetItem py3_PyTuple_GetItem
170 # if PY_VERSION_HEX >= 0x030601f0
171 #  define PySlice_AdjustIndices py3_PySlice_AdjustIndices
172 #  define PySlice_Unpack py3_PySlice_Unpack
173 # endif
174 # undef PySlice_GetIndicesEx
175 # define PySlice_GetIndicesEx py3_PySlice_GetIndicesEx
176 # define PyImport_ImportModule py3_PyImport_ImportModule
177 # define PyObject_Init py3__PyObject_Init
178 # define PyDict_New py3_PyDict_New
179 # define PyDict_GetItemString py3_PyDict_GetItemString
180 # define PyDict_Next py3_PyDict_Next
181 # define PyMapping_Check py3_PyMapping_Check
182 # ifndef PyMapping_Keys
183 #  define PyMapping_Keys py3_PyMapping_Keys
184 # endif
185 # define PyIter_Next py3_PyIter_Next
186 # define PyObject_GetIter py3_PyObject_GetIter
187 # define PyObject_Repr py3_PyObject_Repr
188 # define PyObject_GetItem py3_PyObject_GetItem
189 # define PyObject_IsTrue py3_PyObject_IsTrue
190 # define PyModule_GetDict py3_PyModule_GetDict
191 #undef PyRun_SimpleString
192 # define PyRun_SimpleString py3_PyRun_SimpleString
193 #undef PyRun_String
194 # define PyRun_String py3_PyRun_String
195 # define PyObject_GetAttrString py3_PyObject_GetAttrString
196 # define PyObject_HasAttrString py3_PyObject_HasAttrString
197 # define PyObject_SetAttrString py3_PyObject_SetAttrString
198 # define PyObject_CallFunctionObjArgs py3_PyObject_CallFunctionObjArgs
199 # define _PyObject_CallFunction_SizeT py3__PyObject_CallFunction_SizeT
200 # define PyObject_Call py3_PyObject_Call
201 # define PyEval_GetLocals py3_PyEval_GetLocals
202 # define PyEval_GetGlobals py3_PyEval_GetGlobals
203 # define PySys_SetObject py3_PySys_SetObject
204 # define PySys_GetObject py3_PySys_GetObject
205 # define PySys_SetArgv py3_PySys_SetArgv
206 # define PyType_Ready py3_PyType_Ready
207 #undef Py_BuildValue
208 # define Py_BuildValue py3_Py_BuildValue
209 # define Py_SetPythonHome py3_Py_SetPythonHome
210 # define Py_Initialize py3_Py_Initialize
211 # define Py_Finalize py3_Py_Finalize
212 # define Py_IsInitialized py3_Py_IsInitialized
213 # define _Py_NoneStruct (*py3__Py_NoneStruct)
214 # define _Py_FalseStruct (*py3__Py_FalseStruct)
215 # define _Py_TrueStruct (*py3__Py_TrueStruct)
216 # define _PyObject_NextNotImplemented (*py3__PyObject_NextNotImplemented)
217 # define PyModule_AddObject py3_PyModule_AddObject
218 # define PyImport_AppendInittab py3_PyImport_AppendInittab
219 # define PyImport_AddModule py3_PyImport_AddModule
220 # if PY_VERSION_HEX >= 0x030300f0
221 #  undef _PyUnicode_AsString
222 #  define _PyUnicode_AsString py3_PyUnicode_AsUTF8
223 # else
224 #  define _PyUnicode_AsString py3__PyUnicode_AsString
225 # endif
226 # undef PyUnicode_AsEncodedString
227 # define PyUnicode_AsEncodedString py3_PyUnicode_AsEncodedString
228 # undef PyBytes_AsString
229 # define PyBytes_AsString py3_PyBytes_AsString
230 # ifndef PyBytes_AsStringAndSize
231 #  define PyBytes_AsStringAndSize py3_PyBytes_AsStringAndSize
232 # endif
233 # undef PyBytes_FromString
234 # define PyBytes_FromString py3_PyBytes_FromString
235 # undef PyBytes_FromStringAndSize
236 # define PyBytes_FromStringAndSize py3_PyBytes_FromStringAndSize
237 # define PyFloat_FromDouble py3_PyFloat_FromDouble
238 # define PyFloat_AsDouble py3_PyFloat_AsDouble
239 # define PyObject_GenericGetAttr py3_PyObject_GenericGetAttr
240 # define PyType_Type (*py3_PyType_Type)
241 # define PyStdPrinter_Type (*py3_PyStdPrinter_Type)
242 # define PySlice_Type (*py3_PySlice_Type)
243 # define PyFloat_Type (*py3_PyFloat_Type)
244 # define PyNumber_Check (*py3_PyNumber_Check)
245 # define PyNumber_Long (*py3_PyNumber_Long)
246 # define PyBool_Type (*py3_PyBool_Type)
247 # define PyErr_NewException py3_PyErr_NewException
248 # ifdef Py_DEBUG
249 #  define _Py_NegativeRefcount py3__Py_NegativeRefcount
250 #  define _Py_RefTotal (*py3__Py_RefTotal)
251 #  define _Py_Dealloc py3__Py_Dealloc
252 #  define PyModule_Create2TraceRefs py3_PyModule_Create2TraceRefs
253 # else
254 #  define PyModule_Create2 py3_PyModule_Create2
255 # endif
256 # if defined(Py_DEBUG) && !defined(Py_DEBUG_NO_PYMALLOC)
257 #  define _PyObject_DebugMalloc py3__PyObject_DebugMalloc
258 #  define _PyObject_DebugFree py3__PyObject_DebugFree
259 # else
260 #  define PyObject_Malloc py3_PyObject_Malloc
261 #  define PyObject_Free py3_PyObject_Free
262 # endif
263 # define _PyObject_GC_New py3__PyObject_GC_New
264 # define PyObject_GC_Del py3_PyObject_GC_Del
265 # define PyObject_GC_UnTrack py3_PyObject_GC_UnTrack
266 # define PyType_GenericAlloc py3_PyType_GenericAlloc
267 # define PyType_GenericNew py3_PyType_GenericNew
268 # undef PyUnicode_FromString
269 # define PyUnicode_FromString py3_PyUnicode_FromString
270 # ifndef PyUnicode_FromFormat
271 #  define PyUnicode_FromFormat py3_PyUnicode_FromFormat
272 # else
273 #  define Py_UNICODE_USE_UCS_FUNCTIONS
274 #  ifdef Py_UNICODE_WIDE
275 #   define PyUnicodeUCS4_FromFormat py3_PyUnicodeUCS4_FromFormat
276 #  else
277 #   define PyUnicodeUCS2_FromFormat py3_PyUnicodeUCS2_FromFormat
278 #  endif
279 # endif
280 # undef PyUnicode_Decode
281 # define PyUnicode_Decode py3_PyUnicode_Decode
282 # define PyType_IsSubtype py3_PyType_IsSubtype
283 # define PyCapsule_New py3_PyCapsule_New
284 # define PyCapsule_GetPointer py3_PyCapsule_GetPointer
285 
286 # if defined(Py_DEBUG) && !defined(Py_DEBUG_NO_PYMALLOC)
287 #  undef PyObject_NEW
288 #  define PyObject_NEW(type, typeobj) \
289 ( (type *) PyObject_Init( \
290 	(PyObject *) _PyObject_DebugMalloc( _PyObject_SIZE(typeobj) ), (typeobj)) )
291 # endif
292 
293 /*
294  * Pointers for dynamic link
295  */
296 static int (*py3_PySys_SetArgv)(int, wchar_t **);
297 static void (*py3_Py_SetPythonHome)(wchar_t *home);
298 static void (*py3_Py_Initialize)(void);
299 static PyObject* (*py3_PyList_New)(Py_ssize_t size);
300 static PyGILState_STATE (*py3_PyGILState_Ensure)(void);
301 static void (*py3_PyGILState_Release)(PyGILState_STATE);
302 static int (*py3_PySys_SetObject)(char *, PyObject *);
303 static PyObject* (*py3_PySys_GetObject)(char *);
304 static int (*py3_PyList_Append)(PyObject *, PyObject *);
305 static int (*py3_PyList_Insert)(PyObject *, int, PyObject *);
306 static Py_ssize_t (*py3_PyList_Size)(PyObject *);
307 static int (*py3_PySequence_Check)(PyObject *);
308 static Py_ssize_t (*py3_PySequence_Size)(PyObject *);
309 static PyObject* (*py3_PySequence_GetItem)(PyObject *, Py_ssize_t);
310 static PyObject* (*py3_PySequence_Fast)(PyObject *, const char *);
311 static Py_ssize_t (*py3_PyTuple_Size)(PyObject *);
312 static PyObject* (*py3_PyTuple_GetItem)(PyObject *, Py_ssize_t);
313 static int (*py3_PyMapping_Check)(PyObject *);
314 static PyObject* (*py3_PyMapping_Keys)(PyObject *);
315 # if PY_VERSION_HEX >= 0x030601f0
316 static int (*py3_PySlice_AdjustIndices)(Py_ssize_t length,
317 		     Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t step);
318 static int (*py3_PySlice_Unpack)(PyObject *slice,
319 		     Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step);
320 # endif
321 static int (*py3_PySlice_GetIndicesEx)(PySliceObject_T *r, Py_ssize_t length,
322 		     Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step,
323 		     Py_ssize_t *slicelen);
324 static PyObject* (*py3_PyErr_NoMemory)(void);
325 static void (*py3_Py_Finalize)(void);
326 static void (*py3_PyErr_SetString)(PyObject *, const char *);
327 static void (*py3_PyErr_SetObject)(PyObject *, PyObject *);
328 static int (*py3_PyErr_ExceptionMatches)(PyObject *);
329 static int (*py3_PyRun_SimpleString)(char *);
330 static PyObject* (*py3_PyRun_String)(char *, int, PyObject *, PyObject *);
331 static PyObject* (*py3_PyObject_GetAttrString)(PyObject *, const char *);
332 static int (*py3_PyObject_HasAttrString)(PyObject *, const char *);
333 static int (*py3_PyObject_SetAttrString)(PyObject *, const char *, PyObject *);
334 static PyObject* (*py3_PyObject_CallFunctionObjArgs)(PyObject *, ...);
335 static PyObject* (*py3__PyObject_CallFunction_SizeT)(PyObject *, char *, ...);
336 static PyObject* (*py3_PyObject_Call)(PyObject *, PyObject *, PyObject *);
337 static PyObject* (*py3_PyEval_GetGlobals)();
338 static PyObject* (*py3_PyEval_GetLocals)();
339 static PyObject* (*py3_PyList_GetItem)(PyObject *, Py_ssize_t);
340 static PyObject* (*py3_PyImport_ImportModule)(const char *);
341 static PyObject* (*py3_PyImport_AddModule)(const char *);
342 static int (*py3_PyErr_BadArgument)(void);
343 static PyObject* (*py3_PyErr_Occurred)(void);
344 static PyObject* (*py3_PyModule_GetDict)(PyObject *);
345 static int (*py3_PyList_SetItem)(PyObject *, Py_ssize_t, PyObject *);
346 static PyObject* (*py3_PyDict_GetItemString)(PyObject *, const char *);
347 static int (*py3_PyDict_Next)(PyObject *, Py_ssize_t *, PyObject **, PyObject **);
348 static PyObject* (*py3_PyLong_FromLong)(long);
349 static PyObject* (*py3_PyDict_New)(void);
350 static PyObject* (*py3_PyIter_Next)(PyObject *);
351 static PyObject* (*py3_PyObject_GetIter)(PyObject *);
352 static PyObject* (*py3_PyObject_Repr)(PyObject *);
353 static PyObject* (*py3_PyObject_GetItem)(PyObject *, PyObject *);
354 static int (*py3_PyObject_IsTrue)(PyObject *);
355 static PyObject* (*py3_Py_BuildValue)(char *, ...);
356 static int (*py3_PyType_Ready)(PyTypeObject *type);
357 static int (*py3_PyDict_SetItemString)(PyObject *dp, char *key, PyObject *item);
358 static PyObject* (*py3_PyUnicode_FromString)(const char *u);
359 # ifndef Py_UNICODE_USE_UCS_FUNCTIONS
360 static PyObject* (*py3_PyUnicode_FromFormat)(const char *u, ...);
361 # else
362 #  ifdef Py_UNICODE_WIDE
363 static PyObject* (*py3_PyUnicodeUCS4_FromFormat)(const char *u, ...);
364 #  else
365 static PyObject* (*py3_PyUnicodeUCS2_FromFormat)(const char *u, ...);
366 #  endif
367 # endif
368 static PyObject* (*py3_PyUnicode_Decode)(const char *u, Py_ssize_t size,
369 	const char *encoding, const char *errors);
370 static long (*py3_PyLong_AsLong)(PyObject *);
371 static void (*py3_PyErr_SetNone)(PyObject *);
372 static void (*py3_PyEval_InitThreads)(void);
373 static void(*py3_PyEval_RestoreThread)(PyThreadState *);
374 static PyThreadState*(*py3_PyEval_SaveThread)(void);
375 static int (*py3_PyArg_Parse)(PyObject *, char *, ...);
376 static int (*py3_PyArg_ParseTuple)(PyObject *, char *, ...);
377 static int (*py3_PyMem_Free)(void *);
378 static void* (*py3_PyMem_Malloc)(size_t);
379 static int (*py3_Py_IsInitialized)(void);
380 static void (*py3_PyErr_Clear)(void);
381 static PyObject* (*py3_PyErr_Format)(PyObject *, const char *, ...);
382 static void (*py3_PyErr_PrintEx)(int);
383 static PyObject*(*py3__PyObject_Init)(PyObject *, PyTypeObject *);
384 static iternextfunc py3__PyObject_NextNotImplemented;
385 static PyObject* py3__Py_NoneStruct;
386 static PyObject* py3__Py_FalseStruct;
387 static PyObject* py3__Py_TrueStruct;
388 static int (*py3_PyModule_AddObject)(PyObject *m, const char *name, PyObject *o);
389 static int (*py3_PyImport_AppendInittab)(const char *name, PyObject* (*initfunc)(void));
390 # if PY_VERSION_HEX >= 0x030300f0
391 static char* (*py3_PyUnicode_AsUTF8)(PyObject *unicode);
392 # else
393 static char* (*py3__PyUnicode_AsString)(PyObject *unicode);
394 # endif
395 static PyObject* (*py3_PyUnicode_AsEncodedString)(PyObject *unicode, const char* encoding, const char* errors);
396 static char* (*py3_PyBytes_AsString)(PyObject *bytes);
397 static int (*py3_PyBytes_AsStringAndSize)(PyObject *bytes, char **buffer, Py_ssize_t *length);
398 static PyObject* (*py3_PyBytes_FromString)(char *str);
399 static PyObject* (*py3_PyBytes_FromStringAndSize)(char *str, Py_ssize_t length);
400 static PyObject* (*py3_PyFloat_FromDouble)(double num);
401 static double (*py3_PyFloat_AsDouble)(PyObject *);
402 static PyObject* (*py3_PyObject_GenericGetAttr)(PyObject *obj, PyObject *name);
403 static PyObject* (*py3_PyType_GenericAlloc)(PyTypeObject *type, Py_ssize_t nitems);
404 static PyObject* (*py3_PyType_GenericNew)(PyTypeObject *type, PyObject *args, PyObject *kwds);
405 static PyTypeObject* py3_PyType_Type;
406 static PyTypeObject* py3_PyStdPrinter_Type;
407 static PyTypeObject* py3_PySlice_Type;
408 static PyTypeObject* py3_PyFloat_Type;
409 static PyTypeObject* py3_PyBool_Type;
410 static int (*py3_PyNumber_Check)(PyObject *);
411 static PyObject* (*py3_PyNumber_Long)(PyObject *);
412 static PyObject* (*py3_PyErr_NewException)(char *name, PyObject *base, PyObject *dict);
413 static PyObject* (*py3_PyCapsule_New)(void *, char *, PyCapsule_Destructor);
414 static void* (*py3_PyCapsule_GetPointer)(PyObject *, char *);
415 # ifdef Py_DEBUG
416 static void (*py3__Py_NegativeRefcount)(const char *fname, int lineno, PyObject *op);
417 static Py_ssize_t* py3__Py_RefTotal;
418 static void (*py3__Py_Dealloc)(PyObject *obj);
419 static PyObject* (*py3_PyModule_Create2TraceRefs)(struct PyModuleDef* module, int module_api_version);
420 # else
421 static PyObject* (*py3_PyModule_Create2)(struct PyModuleDef* module, int module_api_version);
422 # endif
423 # if defined(Py_DEBUG) && !defined(Py_DEBUG_NO_PYMALLOC)
424 static void (*py3__PyObject_DebugFree)(void*);
425 static void* (*py3__PyObject_DebugMalloc)(size_t);
426 # else
427 static void (*py3_PyObject_Free)(void*);
428 static void* (*py3_PyObject_Malloc)(size_t);
429 # endif
430 static PyObject*(*py3__PyObject_GC_New)(PyTypeObject *);
431 static void(*py3_PyObject_GC_Del)(void *);
432 static void(*py3_PyObject_GC_UnTrack)(void *);
433 static int (*py3_PyType_IsSubtype)(PyTypeObject *, PyTypeObject *);
434 
435 static HINSTANCE hinstPy3 = 0; /* Instance of python.dll */
436 
437 /* Imported exception objects */
438 static PyObject *p3imp_PyExc_AttributeError;
439 static PyObject *p3imp_PyExc_IndexError;
440 static PyObject *p3imp_PyExc_KeyError;
441 static PyObject *p3imp_PyExc_KeyboardInterrupt;
442 static PyObject *p3imp_PyExc_TypeError;
443 static PyObject *p3imp_PyExc_ValueError;
444 static PyObject *p3imp_PyExc_SystemExit;
445 static PyObject *p3imp_PyExc_RuntimeError;
446 static PyObject *p3imp_PyExc_ImportError;
447 static PyObject *p3imp_PyExc_OverflowError;
448 
449 # define PyExc_AttributeError p3imp_PyExc_AttributeError
450 # define PyExc_IndexError p3imp_PyExc_IndexError
451 # define PyExc_KeyError p3imp_PyExc_KeyError
452 # define PyExc_KeyboardInterrupt p3imp_PyExc_KeyboardInterrupt
453 # define PyExc_TypeError p3imp_PyExc_TypeError
454 # define PyExc_ValueError p3imp_PyExc_ValueError
455 # define PyExc_SystemExit p3imp_PyExc_SystemExit
456 # define PyExc_RuntimeError p3imp_PyExc_RuntimeError
457 # define PyExc_ImportError p3imp_PyExc_ImportError
458 # define PyExc_OverflowError p3imp_PyExc_OverflowError
459 
460 /*
461  * Table of name to function pointer of python.
462  */
463 # define PYTHON_PROC FARPROC
464 static struct
465 {
466     char *name;
467     PYTHON_PROC *ptr;
468 } py3_funcname_table[] =
469 {
470     {"PySys_SetArgv", (PYTHON_PROC*)&py3_PySys_SetArgv},
471     {"Py_SetPythonHome", (PYTHON_PROC*)&py3_Py_SetPythonHome},
472     {"Py_Initialize", (PYTHON_PROC*)&py3_Py_Initialize},
473     {"_PyArg_ParseTuple_SizeT", (PYTHON_PROC*)&py3_PyArg_ParseTuple},
474     {"_Py_BuildValue_SizeT", (PYTHON_PROC*)&py3_Py_BuildValue},
475     {"PyMem_Free", (PYTHON_PROC*)&py3_PyMem_Free},
476     {"PyMem_Malloc", (PYTHON_PROC*)&py3_PyMem_Malloc},
477     {"PyList_New", (PYTHON_PROC*)&py3_PyList_New},
478     {"PyGILState_Ensure", (PYTHON_PROC*)&py3_PyGILState_Ensure},
479     {"PyGILState_Release", (PYTHON_PROC*)&py3_PyGILState_Release},
480     {"PySys_SetObject", (PYTHON_PROC*)&py3_PySys_SetObject},
481     {"PySys_GetObject", (PYTHON_PROC*)&py3_PySys_GetObject},
482     {"PyList_Append", (PYTHON_PROC*)&py3_PyList_Append},
483     {"PyList_Insert", (PYTHON_PROC*)&py3_PyList_Insert},
484     {"PyList_Size", (PYTHON_PROC*)&py3_PyList_Size},
485     {"PySequence_Check", (PYTHON_PROC*)&py3_PySequence_Check},
486     {"PySequence_Size", (PYTHON_PROC*)&py3_PySequence_Size},
487     {"PySequence_GetItem", (PYTHON_PROC*)&py3_PySequence_GetItem},
488     {"PySequence_Fast", (PYTHON_PROC*)&py3_PySequence_Fast},
489     {"PyTuple_Size", (PYTHON_PROC*)&py3_PyTuple_Size},
490     {"PyTuple_GetItem", (PYTHON_PROC*)&py3_PyTuple_GetItem},
491 # if PY_VERSION_HEX >= 0x030601f0
492     {"PySlice_AdjustIndices", (PYTHON_PROC*)&py3_PySlice_AdjustIndices},
493     {"PySlice_Unpack", (PYTHON_PROC*)&py3_PySlice_Unpack},
494 # endif
495     {"PySlice_GetIndicesEx", (PYTHON_PROC*)&py3_PySlice_GetIndicesEx},
496     {"PyErr_NoMemory", (PYTHON_PROC*)&py3_PyErr_NoMemory},
497     {"Py_Finalize", (PYTHON_PROC*)&py3_Py_Finalize},
498     {"PyErr_SetString", (PYTHON_PROC*)&py3_PyErr_SetString},
499     {"PyErr_SetObject", (PYTHON_PROC*)&py3_PyErr_SetObject},
500     {"PyErr_ExceptionMatches", (PYTHON_PROC*)&py3_PyErr_ExceptionMatches},
501     {"PyRun_SimpleString", (PYTHON_PROC*)&py3_PyRun_SimpleString},
502     {"PyRun_String", (PYTHON_PROC*)&py3_PyRun_String},
503     {"PyObject_GetAttrString", (PYTHON_PROC*)&py3_PyObject_GetAttrString},
504     {"PyObject_HasAttrString", (PYTHON_PROC*)&py3_PyObject_HasAttrString},
505     {"PyObject_SetAttrString", (PYTHON_PROC*)&py3_PyObject_SetAttrString},
506     {"PyObject_CallFunctionObjArgs", (PYTHON_PROC*)&py3_PyObject_CallFunctionObjArgs},
507     {"_PyObject_CallFunction_SizeT", (PYTHON_PROC*)&py3__PyObject_CallFunction_SizeT},
508     {"PyObject_Call", (PYTHON_PROC*)&py3_PyObject_Call},
509     {"PyEval_GetGlobals", (PYTHON_PROC*)&py3_PyEval_GetGlobals},
510     {"PyEval_GetLocals", (PYTHON_PROC*)&py3_PyEval_GetLocals},
511     {"PyList_GetItem", (PYTHON_PROC*)&py3_PyList_GetItem},
512     {"PyImport_ImportModule", (PYTHON_PROC*)&py3_PyImport_ImportModule},
513     {"PyImport_AddModule", (PYTHON_PROC*)&py3_PyImport_AddModule},
514     {"PyErr_BadArgument", (PYTHON_PROC*)&py3_PyErr_BadArgument},
515     {"PyErr_Occurred", (PYTHON_PROC*)&py3_PyErr_Occurred},
516     {"PyModule_GetDict", (PYTHON_PROC*)&py3_PyModule_GetDict},
517     {"PyList_SetItem", (PYTHON_PROC*)&py3_PyList_SetItem},
518     {"PyDict_GetItemString", (PYTHON_PROC*)&py3_PyDict_GetItemString},
519     {"PyDict_Next", (PYTHON_PROC*)&py3_PyDict_Next},
520     {"PyMapping_Check", (PYTHON_PROC*)&py3_PyMapping_Check},
521     {"PyMapping_Keys", (PYTHON_PROC*)&py3_PyMapping_Keys},
522     {"PyIter_Next", (PYTHON_PROC*)&py3_PyIter_Next},
523     {"PyObject_GetIter", (PYTHON_PROC*)&py3_PyObject_GetIter},
524     {"PyObject_Repr", (PYTHON_PROC*)&py3_PyObject_Repr},
525     {"PyObject_GetItem", (PYTHON_PROC*)&py3_PyObject_GetItem},
526     {"PyObject_IsTrue", (PYTHON_PROC*)&py3_PyObject_IsTrue},
527     {"PyLong_FromLong", (PYTHON_PROC*)&py3_PyLong_FromLong},
528     {"PyDict_New", (PYTHON_PROC*)&py3_PyDict_New},
529     {"PyType_Ready", (PYTHON_PROC*)&py3_PyType_Ready},
530     {"PyDict_SetItemString", (PYTHON_PROC*)&py3_PyDict_SetItemString},
531     {"PyLong_AsLong", (PYTHON_PROC*)&py3_PyLong_AsLong},
532     {"PyErr_SetNone", (PYTHON_PROC*)&py3_PyErr_SetNone},
533     {"PyEval_InitThreads", (PYTHON_PROC*)&py3_PyEval_InitThreads},
534     {"PyEval_RestoreThread", (PYTHON_PROC*)&py3_PyEval_RestoreThread},
535     {"PyEval_SaveThread", (PYTHON_PROC*)&py3_PyEval_SaveThread},
536     {"_PyArg_Parse_SizeT", (PYTHON_PROC*)&py3_PyArg_Parse},
537     {"Py_IsInitialized", (PYTHON_PROC*)&py3_Py_IsInitialized},
538     {"_PyObject_NextNotImplemented", (PYTHON_PROC*)&py3__PyObject_NextNotImplemented},
539     {"_Py_NoneStruct", (PYTHON_PROC*)&py3__Py_NoneStruct},
540     {"_Py_FalseStruct", (PYTHON_PROC*)&py3__Py_FalseStruct},
541     {"_Py_TrueStruct", (PYTHON_PROC*)&py3__Py_TrueStruct},
542     {"PyErr_Clear", (PYTHON_PROC*)&py3_PyErr_Clear},
543     {"PyErr_Format", (PYTHON_PROC*)&py3_PyErr_Format},
544     {"PyErr_PrintEx", (PYTHON_PROC*)&py3_PyErr_PrintEx},
545     {"PyObject_Init", (PYTHON_PROC*)&py3__PyObject_Init},
546     {"PyModule_AddObject", (PYTHON_PROC*)&py3_PyModule_AddObject},
547     {"PyImport_AppendInittab", (PYTHON_PROC*)&py3_PyImport_AppendInittab},
548 # if PY_VERSION_HEX >= 0x030300f0
549     {"PyUnicode_AsUTF8", (PYTHON_PROC*)&py3_PyUnicode_AsUTF8},
550 # else
551     {"_PyUnicode_AsString", (PYTHON_PROC*)&py3__PyUnicode_AsString},
552 # endif
553 # ifndef Py_UNICODE_USE_UCS_FUNCTIONS
554     {"PyUnicode_FromFormat", (PYTHON_PROC*)&py3_PyUnicode_FromFormat},
555 # else
556 #  ifdef Py_UNICODE_WIDE
557     {"PyUnicodeUCS4_FromFormat", (PYTHON_PROC*)&py3_PyUnicodeUCS4_FromFormat},
558 #  else
559     {"PyUnicodeUCS2_FromFormat", (PYTHON_PROC*)&py3_PyUnicodeUCS2_FromFormat},
560 #  endif
561 # endif
562     {"PyBytes_AsString", (PYTHON_PROC*)&py3_PyBytes_AsString},
563     {"PyBytes_AsStringAndSize", (PYTHON_PROC*)&py3_PyBytes_AsStringAndSize},
564     {"PyBytes_FromString", (PYTHON_PROC*)&py3_PyBytes_FromString},
565     {"PyBytes_FromStringAndSize", (PYTHON_PROC*)&py3_PyBytes_FromStringAndSize},
566     {"PyFloat_FromDouble", (PYTHON_PROC*)&py3_PyFloat_FromDouble},
567     {"PyFloat_AsDouble", (PYTHON_PROC*)&py3_PyFloat_AsDouble},
568     {"PyObject_GenericGetAttr", (PYTHON_PROC*)&py3_PyObject_GenericGetAttr},
569     {"PyType_GenericAlloc", (PYTHON_PROC*)&py3_PyType_GenericAlloc},
570     {"PyType_GenericNew", (PYTHON_PROC*)&py3_PyType_GenericNew},
571     {"PyType_Type", (PYTHON_PROC*)&py3_PyType_Type},
572     {"PyStdPrinter_Type", (PYTHON_PROC*)&py3_PyStdPrinter_Type},
573     {"PySlice_Type", (PYTHON_PROC*)&py3_PySlice_Type},
574     {"PyFloat_Type", (PYTHON_PROC*)&py3_PyFloat_Type},
575     {"PyBool_Type", (PYTHON_PROC*)&py3_PyBool_Type},
576     {"PyNumber_Check", (PYTHON_PROC*)&py3_PyNumber_Check},
577     {"PyNumber_Long", (PYTHON_PROC*)&py3_PyNumber_Long},
578     {"PyErr_NewException", (PYTHON_PROC*)&py3_PyErr_NewException},
579 # ifdef Py_DEBUG
580     {"_Py_NegativeRefcount", (PYTHON_PROC*)&py3__Py_NegativeRefcount},
581     {"_Py_RefTotal", (PYTHON_PROC*)&py3__Py_RefTotal},
582     {"_Py_Dealloc", (PYTHON_PROC*)&py3__Py_Dealloc},
583     {"PyModule_Create2TraceRefs", (PYTHON_PROC*)&py3_PyModule_Create2TraceRefs},
584 # else
585     {"PyModule_Create2", (PYTHON_PROC*)&py3_PyModule_Create2},
586 # endif
587 # if defined(Py_DEBUG) && !defined(Py_DEBUG_NO_PYMALLOC)
588     {"_PyObject_DebugFree", (PYTHON_PROC*)&py3__PyObject_DebugFree},
589     {"_PyObject_DebugMalloc", (PYTHON_PROC*)&py3__PyObject_DebugMalloc},
590 # else
591     {"PyObject_Malloc", (PYTHON_PROC*)&py3_PyObject_Malloc},
592     {"PyObject_Free", (PYTHON_PROC*)&py3_PyObject_Free},
593 # endif
594     {"_PyObject_GC_New", (PYTHON_PROC*)&py3__PyObject_GC_New},
595     {"PyObject_GC_Del", (PYTHON_PROC*)&py3_PyObject_GC_Del},
596     {"PyObject_GC_UnTrack", (PYTHON_PROC*)&py3_PyObject_GC_UnTrack},
597     {"PyType_IsSubtype", (PYTHON_PROC*)&py3_PyType_IsSubtype},
598     {"PyCapsule_New", (PYTHON_PROC*)&py3_PyCapsule_New},
599     {"PyCapsule_GetPointer", (PYTHON_PROC*)&py3_PyCapsule_GetPointer},
600     {"", NULL},
601 };
602 
603 /*
604  * Free python.dll
605  */
606     static void
607 end_dynamic_python3(void)
608 {
609     if (hinstPy3 != 0)
610     {
611 	close_dll(hinstPy3);
612 	hinstPy3 = 0;
613     }
614 }
615 
616 /*
617  * Load library and get all pointers.
618  * Parameter 'libname' provides name of DLL.
619  * Return OK or FAIL.
620  */
621     static int
622 py3_runtime_link_init(char *libname, int verbose)
623 {
624     int i;
625     PYTHON_PROC *ucs_from_string = (PYTHON_PROC *)&py3_PyUnicode_FromString;
626     PYTHON_PROC *ucs_decode = (PYTHON_PROC *)&py3_PyUnicode_Decode;
627     PYTHON_PROC *ucs_as_encoded_string =
628 				 (PYTHON_PROC *)&py3_PyUnicode_AsEncodedString;
629 
630 # if !(defined(PY_NO_RTLD_GLOBAL) && defined(PY3_NO_RTLD_GLOBAL)) && defined(UNIX) && defined(FEAT_PYTHON)
631     /* Can't have Python and Python3 loaded at the same time.
632      * It cause a crash, because RTLD_GLOBAL is needed for
633      * standard C extension libraries of one or both python versions. */
634     if (python_loaded())
635     {
636 	if (verbose)
637 	    emsg(_("E837: This Vim cannot execute :py3 after using :python"));
638 	return FAIL;
639     }
640 # endif
641 
642     if (hinstPy3 != 0)
643 	return OK;
644     hinstPy3 = load_dll(libname);
645 
646     if (!hinstPy3)
647     {
648 	if (verbose)
649 	    semsg(_(e_loadlib), libname);
650 	return FAIL;
651     }
652 
653     for (i = 0; py3_funcname_table[i].ptr; ++i)
654     {
655 	if ((*py3_funcname_table[i].ptr = symbol_from_dll(hinstPy3,
656 			py3_funcname_table[i].name)) == NULL)
657 	{
658 	    close_dll(hinstPy3);
659 	    hinstPy3 = 0;
660 	    if (verbose)
661 		semsg(_(e_loadfunc), py3_funcname_table[i].name);
662 	    return FAIL;
663 	}
664     }
665 
666     /* Load unicode functions separately as only the ucs2 or the ucs4 functions
667      * will be present in the library. */
668 # if PY_VERSION_HEX >= 0x030300f0
669     *ucs_from_string = symbol_from_dll(hinstPy3, "PyUnicode_FromString");
670     *ucs_decode = symbol_from_dll(hinstPy3, "PyUnicode_Decode");
671     *ucs_as_encoded_string = symbol_from_dll(hinstPy3,
672 	    "PyUnicode_AsEncodedString");
673 # else
674     *ucs_from_string = symbol_from_dll(hinstPy3, "PyUnicodeUCS2_FromString");
675     *ucs_decode = symbol_from_dll(hinstPy3,
676 	    "PyUnicodeUCS2_Decode");
677     *ucs_as_encoded_string = symbol_from_dll(hinstPy3,
678 	    "PyUnicodeUCS2_AsEncodedString");
679     if (*ucs_from_string == NULL || *ucs_decode == NULL
680 					     || *ucs_as_encoded_string == NULL)
681     {
682 	*ucs_from_string = symbol_from_dll(hinstPy3,
683 		"PyUnicodeUCS4_FromString");
684 	*ucs_decode = symbol_from_dll(hinstPy3,
685 		"PyUnicodeUCS4_Decode");
686 	*ucs_as_encoded_string = symbol_from_dll(hinstPy3,
687 		"PyUnicodeUCS4_AsEncodedString");
688     }
689 # endif
690     if (*ucs_from_string == NULL || *ucs_decode == NULL
691 					     || *ucs_as_encoded_string == NULL)
692     {
693 	close_dll(hinstPy3);
694 	hinstPy3 = 0;
695 	if (verbose)
696 	    semsg(_(e_loadfunc), "PyUnicode_UCSX_*");
697 	return FAIL;
698     }
699 
700     return OK;
701 }
702 
703 /*
704  * If python is enabled (there is installed python on Windows system) return
705  * TRUE, else FALSE.
706  */
707     int
708 python3_enabled(int verbose)
709 {
710     return py3_runtime_link_init((char *)p_py3dll, verbose) == OK;
711 }
712 
713 /* Load the standard Python exceptions - don't import the symbols from the
714  * DLL, as this can cause errors (importing data symbols is not reliable).
715  */
716     static void
717 get_py3_exceptions(void)
718 {
719     PyObject *exmod = PyImport_ImportModule("builtins");
720     PyObject *exdict = PyModule_GetDict(exmod);
721     p3imp_PyExc_AttributeError = PyDict_GetItemString(exdict, "AttributeError");
722     p3imp_PyExc_IndexError = PyDict_GetItemString(exdict, "IndexError");
723     p3imp_PyExc_KeyError = PyDict_GetItemString(exdict, "KeyError");
724     p3imp_PyExc_KeyboardInterrupt = PyDict_GetItemString(exdict, "KeyboardInterrupt");
725     p3imp_PyExc_TypeError = PyDict_GetItemString(exdict, "TypeError");
726     p3imp_PyExc_ValueError = PyDict_GetItemString(exdict, "ValueError");
727     p3imp_PyExc_SystemExit = PyDict_GetItemString(exdict, "SystemExit");
728     p3imp_PyExc_RuntimeError = PyDict_GetItemString(exdict, "RuntimeError");
729     p3imp_PyExc_ImportError = PyDict_GetItemString(exdict, "ImportError");
730     p3imp_PyExc_OverflowError = PyDict_GetItemString(exdict, "OverflowError");
731     Py_XINCREF(p3imp_PyExc_AttributeError);
732     Py_XINCREF(p3imp_PyExc_IndexError);
733     Py_XINCREF(p3imp_PyExc_KeyError);
734     Py_XINCREF(p3imp_PyExc_KeyboardInterrupt);
735     Py_XINCREF(p3imp_PyExc_TypeError);
736     Py_XINCREF(p3imp_PyExc_ValueError);
737     Py_XINCREF(p3imp_PyExc_SystemExit);
738     Py_XINCREF(p3imp_PyExc_RuntimeError);
739     Py_XINCREF(p3imp_PyExc_ImportError);
740     Py_XINCREF(p3imp_PyExc_OverflowError);
741     Py_XDECREF(exmod);
742 }
743 #endif /* DYNAMIC_PYTHON3 */
744 
745 static int py3initialised = 0;
746 #define PYINITIALISED py3initialised
747 static int python_end_called = FALSE;
748 
749 #define DESTRUCTOR_FINISH(self) Py_TYPE(self)->tp_free((PyObject*)self)
750 
751 #define WIN_PYTHON_REF(win) win->w_python3_ref
752 #define BUF_PYTHON_REF(buf) buf->b_python3_ref
753 #define TAB_PYTHON_REF(tab) tab->tp_python3_ref
754 
755     static void
756 call_PyObject_Free(void *p)
757 {
758 #if defined(Py_DEBUG) && !defined(Py_DEBUG_NO_PYMALLOC)
759     _PyObject_DebugFree(p);
760 #else
761     PyObject_Free(p);
762 #endif
763 }
764 
765     static PyObject *
766 call_PyType_GenericNew(PyTypeObject *type, PyObject *args, PyObject *kwds)
767 {
768     return PyType_GenericNew(type,args,kwds);
769 }
770 
771     static PyObject *
772 call_PyType_GenericAlloc(PyTypeObject *type, Py_ssize_t nitems)
773 {
774     return PyType_GenericAlloc(type,nitems);
775 }
776 
777 static PyObject *OutputGetattro(PyObject *, PyObject *);
778 static int OutputSetattro(PyObject *, PyObject *, PyObject *);
779 static PyObject *BufferGetattro(PyObject *, PyObject *);
780 static int BufferSetattro(PyObject *, PyObject *, PyObject *);
781 static PyObject *TabPageGetattro(PyObject *, PyObject *);
782 static PyObject *WindowGetattro(PyObject *, PyObject *);
783 static int WindowSetattro(PyObject *, PyObject *, PyObject *);
784 static PyObject *RangeGetattro(PyObject *, PyObject *);
785 static PyObject *CurrentGetattro(PyObject *, PyObject *);
786 static int CurrentSetattro(PyObject *, PyObject *, PyObject *);
787 static PyObject *DictionaryGetattro(PyObject *, PyObject *);
788 static int DictionarySetattro(PyObject *, PyObject *, PyObject *);
789 static PyObject *ListGetattro(PyObject *, PyObject *);
790 static int ListSetattro(PyObject *, PyObject *, PyObject *);
791 static PyObject *FunctionGetattro(PyObject *, PyObject *);
792 
793 static struct PyModuleDef vimmodule;
794 
795 #define PY_CAN_RECURSE
796 
797 /*
798  * Include the code shared with if_python.c
799  */
800 #include "if_py_both.h"
801 
802 // NOTE: Must always be used at the start of a block, since it declares "name".
803 #define GET_ATTR_STRING(name, nameobj) \
804     char	*name = ""; \
805     if (PyUnicode_Check(nameobj)) \
806 	name = (char *)_PyUnicode_AsString(nameobj)
807 
808 #define PY3OBJ_DELETED(obj) (obj->ob_base.ob_refcnt<=0)
809 
810 /******************************************************
811  * Internal function prototypes.
812  */
813 
814 static PyObject *Py3Init_vim(void);
815 
816 /******************************************************
817  * 1. Python interpreter main program.
818  */
819 
820     void
821 python3_end(void)
822 {
823     static int recurse = 0;
824 
825     /* If a crash occurs while doing this, don't try again. */
826     if (recurse != 0)
827 	return;
828 
829     python_end_called = TRUE;
830     ++recurse;
831 
832 #ifdef DYNAMIC_PYTHON3
833     if (hinstPy3)
834 #endif
835     if (Py_IsInitialized())
836     {
837 	/* acquire lock before finalizing */
838 	PyGILState_Ensure();
839 
840 	Py_Finalize();
841     }
842 
843 #ifdef DYNAMIC_PYTHON3
844     end_dynamic_python3();
845 #endif
846 
847     --recurse;
848 }
849 
850 #if (defined(DYNAMIC_PYTHON3) && defined(DYNAMIC_PYTHON) && defined(FEAT_PYTHON) && defined(UNIX)) || defined(PROTO)
851     int
852 python3_loaded(void)
853 {
854     return (hinstPy3 != 0);
855 }
856 #endif
857 
858 static wchar_t *py_home_buf = NULL;
859 
860     static int
861 Python3_Init(void)
862 {
863     if (!py3initialised)
864     {
865 #ifdef DYNAMIC_PYTHON3
866 	if (!python3_enabled(TRUE))
867 	{
868 	    emsg(_("E263: Sorry, this command is disabled, the Python library could not be loaded."));
869 	    goto fail;
870 	}
871 #endif
872 
873 	init_structs();
874 
875 	if (*p_py3home != NUL)
876 	{
877 	    size_t len = mbstowcs(NULL, (char *)p_py3home, 0) + 1;
878 
879 	    /* The string must not change later, make a copy in static memory. */
880 	    py_home_buf = (wchar_t *)alloc(len * sizeof(wchar_t));
881 	    if (py_home_buf != NULL && mbstowcs(
882 			    py_home_buf, (char *)p_py3home, len) != (size_t)-1)
883 		Py_SetPythonHome(py_home_buf);
884 	}
885 #ifdef PYTHON3_HOME
886 	else if (mch_getenv((char_u *)"PYTHONHOME") == NULL)
887 	    Py_SetPythonHome(PYTHON3_HOME);
888 #endif
889 
890 	PyImport_AppendInittab("vim", Py3Init_vim);
891 
892 	Py_Initialize();
893 
894 	/* Initialise threads, and below save the state using
895 	 * PyEval_SaveThread.  Without the call to PyEval_SaveThread, thread
896 	 * specific state (such as the system trace hook), will be lost
897 	 * between invocations of Python code. */
898 	PyEval_InitThreads();
899 #ifdef DYNAMIC_PYTHON3
900 	get_py3_exceptions();
901 #endif
902 
903 	if (PythonIO_Init_io())
904 	    goto fail;
905 
906 	globals = PyModule_GetDict(PyImport_AddModule("__main__"));
907 
908 	/* Remove the element from sys.path that was added because of our
909 	 * argv[0] value in Py3Init_vim().  Previously we used an empty
910 	 * string, but depending on the OS we then get an empty entry or
911 	 * the current directory in sys.path.
912 	 * Only after vim has been imported, the element does exist in
913 	 * sys.path.
914 	 */
915 	PyRun_SimpleString("import vim; import sys; sys.path = list(filter(lambda x: not x.endswith('must>not&exist'), sys.path))");
916 
917 	/* lock is created and acquired in PyEval_InitThreads() and thread
918 	 * state is created in Py_Initialize()
919 	 * there _PyGILState_NoteThreadState() also sets gilcounter to 1
920 	 * (python must have threads enabled!)
921 	 * so the following does both: unlock GIL and save thread state in TLS
922 	 * without deleting thread state
923 	 */
924 	PyEval_SaveThread();
925 
926 	py3initialised = 1;
927     }
928 
929     return 0;
930 
931 fail:
932     /* We call PythonIO_Flush() here to print any Python errors.
933      * This is OK, as it is possible to call this function even
934      * if PythonIO_Init_io() has not completed successfully (it will
935      * not do anything in this case).
936      */
937     PythonIO_Flush();
938     return -1;
939 }
940 
941 /*
942  * External interface
943  */
944     static void
945 DoPyCommand(const char *cmd, rangeinitializer init_range, runner run, void *arg)
946 {
947 #if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
948     char		*saved_locale;
949 #endif
950     PyObject		*cmdstr;
951     PyObject		*cmdbytes;
952     PyGILState_STATE	pygilstate;
953 
954     if (python_end_called)
955 	goto theend;
956 
957     if (Python3_Init())
958 	goto theend;
959 
960     init_range(arg);
961 
962     Python_Release_Vim();	    /* leave vim */
963 
964 #if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
965     /* Python only works properly when the LC_NUMERIC locale is "C". */
966     saved_locale = setlocale(LC_NUMERIC, NULL);
967     if (saved_locale == NULL || STRCMP(saved_locale, "C") == 0)
968 	saved_locale = NULL;
969     else
970     {
971 	/* Need to make a copy, value may change when setting new locale. */
972 	saved_locale = (char *)vim_strsave((char_u *)saved_locale);
973 	(void)setlocale(LC_NUMERIC, "C");
974     }
975 #endif
976 
977     pygilstate = PyGILState_Ensure();
978 
979     /* PyRun_SimpleString expects a UTF-8 string. Wrong encoding may cause
980      * SyntaxError (unicode error). */
981     cmdstr = PyUnicode_Decode(cmd, strlen(cmd),
982 					(char *)ENC_OPT, CODEC_ERROR_HANDLER);
983     cmdbytes = PyUnicode_AsEncodedString(cmdstr, "utf-8", CODEC_ERROR_HANDLER);
984     Py_XDECREF(cmdstr);
985 
986     run(PyBytes_AsString(cmdbytes), arg, &pygilstate);
987     Py_XDECREF(cmdbytes);
988 
989     PyGILState_Release(pygilstate);
990 
991 #if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
992     if (saved_locale != NULL)
993     {
994 	(void)setlocale(LC_NUMERIC, saved_locale);
995 	vim_free(saved_locale);
996     }
997 #endif
998 
999     Python_Lock_Vim();		    /* enter vim */
1000     PythonIO_Flush();
1001 
1002 theend:
1003     return;	    /* keeps lint happy */
1004 }
1005 
1006 /*
1007  * ":py3"
1008  */
1009     void
1010 ex_py3(exarg_T *eap)
1011 {
1012     char_u *script;
1013 
1014     script = script_get(eap, eap->arg);
1015     if (!eap->skip)
1016     {
1017 	if (p_pyx == 0)
1018 	    p_pyx = 3;
1019 
1020 	DoPyCommand(script == NULL ? (char *) eap->arg : (char *) script,
1021 		(rangeinitializer) init_range_cmd,
1022 		(runner) run_cmd,
1023 		(void *) eap);
1024     }
1025     vim_free(script);
1026 }
1027 
1028 #define BUFFER_SIZE 2048
1029 
1030 /*
1031  * ":py3file"
1032  */
1033     void
1034 ex_py3file(exarg_T *eap)
1035 {
1036     static char buffer[BUFFER_SIZE];
1037     const char *file;
1038     char *p;
1039     int i;
1040 
1041     if (p_pyx == 0)
1042 	p_pyx = 3;
1043 
1044     /* Have to do it like this. PyRun_SimpleFile requires you to pass a
1045      * stdio file pointer, but Vim and the Python DLL are compiled with
1046      * different options under Windows, meaning that stdio pointers aren't
1047      * compatible between the two. Yuk.
1048      *
1049      * construct: exec(compile(open('a_filename', 'rb').read(), 'a_filename', 'exec'))
1050      *
1051      * Using bytes so that Python can detect the source encoding as it normally
1052      * does. The doc does not say "compile" accept bytes, though.
1053      *
1054      * We need to escape any backslashes or single quotes in the file name, so that
1055      * Python won't mangle the file name.
1056      */
1057 
1058     strcpy(buffer, "exec(compile(open('");
1059     p = buffer + 19; /* size of "exec(compile(open('" */
1060 
1061     for (i=0; i<2; ++i)
1062     {
1063 	file = (char *)eap->arg;
1064 	while (*file && p < buffer + (BUFFER_SIZE - 3))
1065 	{
1066 	    if (*file == '\\' || *file == '\'')
1067 		*p++ = '\\';
1068 	    *p++ = *file++;
1069 	}
1070 	/* If we didn't finish the file name, we hit a buffer overflow */
1071 	if (*file != '\0')
1072 	    return;
1073 	if (i==0)
1074 	{
1075 	    strcpy(p,"','rb').read(),'");
1076 	    p += 16;
1077 	}
1078 	else
1079 	{
1080 	    strcpy(p,"','exec'))");
1081 	    p += 10;
1082 	}
1083     }
1084 
1085 
1086     /* Execute the file */
1087     DoPyCommand(buffer,
1088 	    (rangeinitializer) init_range_cmd,
1089 	    (runner) run_cmd,
1090 	    (void *) eap);
1091 }
1092 
1093     void
1094 ex_py3do(exarg_T *eap)
1095 {
1096     if (p_pyx == 0)
1097 	p_pyx = 3;
1098 
1099     DoPyCommand((char *)eap->arg,
1100 	    (rangeinitializer)init_range_cmd,
1101 	    (runner)run_do,
1102 	    (void *)eap);
1103 }
1104 
1105 /******************************************************
1106  * 2. Python output stream: writes output via [e]msg().
1107  */
1108 
1109 /* Implementation functions
1110  */
1111 
1112     static PyObject *
1113 OutputGetattro(PyObject *self, PyObject *nameobj)
1114 {
1115     GET_ATTR_STRING(name, nameobj);
1116 
1117     if (strcmp(name, "softspace") == 0)
1118 	return PyLong_FromLong(((OutputObject *)(self))->softspace);
1119     else if (strcmp(name, "errors") == 0)
1120 	return PyString_FromString("strict");
1121     else if (strcmp(name, "encoding") == 0)
1122 	return PyString_FromString(ENC_OPT);
1123 
1124     return PyObject_GenericGetAttr(self, nameobj);
1125 }
1126 
1127     static int
1128 OutputSetattro(PyObject *self, PyObject *nameobj, PyObject *val)
1129 {
1130     GET_ATTR_STRING(name, nameobj);
1131 
1132     return OutputSetattr((OutputObject *)(self), name, val);
1133 }
1134 
1135 /******************************************************
1136  * 3. Implementation of the Vim module for Python
1137  */
1138 
1139 /* Window type - Implementation functions
1140  * --------------------------------------
1141  */
1142 
1143 #define WindowType_Check(obj) ((obj)->ob_base.ob_type == &WindowType)
1144 
1145 /* Buffer type - Implementation functions
1146  * --------------------------------------
1147  */
1148 
1149 #define BufferType_Check(obj) ((obj)->ob_base.ob_type == &BufferType)
1150 
1151 static PyObject* BufferSubscript(PyObject *self, PyObject *idx);
1152 static Py_ssize_t BufferAsSubscript(PyObject *self, PyObject *idx, PyObject *val);
1153 
1154 /* Line range type - Implementation functions
1155  * --------------------------------------
1156  */
1157 
1158 #define RangeType_Check(obj) ((obj)->ob_base.ob_type == &RangeType)
1159 
1160 static PyObject* RangeSubscript(PyObject *self, PyObject *idx);
1161 static Py_ssize_t RangeAsItem(PyObject *, Py_ssize_t, PyObject *);
1162 static Py_ssize_t RangeAsSubscript(PyObject *self, PyObject *idx, PyObject *val);
1163 
1164 /* Current objects type - Implementation functions
1165  * -----------------------------------------------
1166  */
1167 
1168 static PySequenceMethods BufferAsSeq = {
1169     (lenfunc)		BufferLength,	    /* sq_length,    len(x)   */
1170     (binaryfunc)	0,		    /* sq_concat,    x+y      */
1171     (ssizeargfunc)	0,		    /* sq_repeat,    x*n      */
1172     (ssizeargfunc)	BufferItem,	    /* sq_item,      x[i]     */
1173     0,					    /* was_sq_slice,	 x[i:j]   */
1174     0,					    /* sq_ass_item,  x[i]=v   */
1175     0,					    /* sq_ass_slice, x[i:j]=v */
1176     0,					    /* sq_contains */
1177     0,					    /* sq_inplace_concat */
1178     0,					    /* sq_inplace_repeat */
1179 };
1180 
1181 static PyMappingMethods BufferAsMapping = {
1182     /* mp_length	*/ (lenfunc)BufferLength,
1183     /* mp_subscript     */ (binaryfunc)BufferSubscript,
1184     /* mp_ass_subscript */ (objobjargproc)BufferAsSubscript,
1185 };
1186 
1187 
1188 /* Buffer object
1189  */
1190 
1191     static PyObject *
1192 BufferGetattro(PyObject *self, PyObject *nameobj)
1193 {
1194     PyObject *r;
1195 
1196     GET_ATTR_STRING(name, nameobj);
1197 
1198     if ((r = BufferAttrValid((BufferObject *)(self), name)))
1199 	return r;
1200 
1201     if (CheckBuffer((BufferObject *)(self)))
1202 	return NULL;
1203 
1204     r = BufferAttr((BufferObject *)(self), name);
1205     if (r || PyErr_Occurred())
1206 	return r;
1207     else
1208 	return PyObject_GenericGetAttr(self, nameobj);
1209 }
1210 
1211     static int
1212 BufferSetattro(PyObject *self, PyObject *nameobj, PyObject *val)
1213 {
1214     GET_ATTR_STRING(name, nameobj);
1215 
1216     return BufferSetattr((BufferObject *)(self), name, val);
1217 }
1218 
1219 /******************/
1220 
1221     static PyObject *
1222 BufferSubscript(PyObject *self, PyObject* idx)
1223 {
1224     if (PyLong_Check(idx))
1225     {
1226 	long _idx = PyLong_AsLong(idx);
1227 	return BufferItem((BufferObject *)(self), _idx);
1228     } else if (PySlice_Check(idx))
1229     {
1230 	Py_ssize_t start, stop, step, slicelen;
1231 
1232 	if (CheckBuffer((BufferObject *) self))
1233 	    return NULL;
1234 
1235 	if (PySlice_GetIndicesEx((PySliceObject_T *)idx,
1236 	      (Py_ssize_t)((BufferObject *)(self))->buf->b_ml.ml_line_count,
1237 	      &start, &stop,
1238 	      &step, &slicelen) < 0)
1239 	{
1240 	    return NULL;
1241 	}
1242 	return BufferSlice((BufferObject *)(self), start, stop);
1243     }
1244     else
1245     {
1246 	RAISE_INVALID_INDEX_TYPE(idx);
1247 	return NULL;
1248     }
1249 }
1250 
1251     static Py_ssize_t
1252 BufferAsSubscript(PyObject *self, PyObject* idx, PyObject* val)
1253 {
1254     if (PyLong_Check(idx))
1255     {
1256 	long n = PyLong_AsLong(idx);
1257 	return RBAsItem((BufferObject *)(self), n, val, 1,
1258 		    (Py_ssize_t)((BufferObject *)(self))->buf->b_ml.ml_line_count,
1259 		    NULL);
1260     } else if (PySlice_Check(idx))
1261     {
1262 	Py_ssize_t start, stop, step, slicelen;
1263 
1264 	if (CheckBuffer((BufferObject *) self))
1265 	    return -1;
1266 
1267 	if (PySlice_GetIndicesEx((PySliceObject_T *)idx,
1268 	      (Py_ssize_t)((BufferObject *)(self))->buf->b_ml.ml_line_count,
1269 	      &start, &stop,
1270 	      &step, &slicelen) < 0)
1271 	{
1272 	    return -1;
1273 	}
1274 	return RBAsSlice((BufferObject *)(self), start, stop, val, 1,
1275 			  (PyInt)((BufferObject *)(self))->buf->b_ml.ml_line_count,
1276 			  NULL);
1277     }
1278     else
1279     {
1280 	RAISE_INVALID_INDEX_TYPE(idx);
1281 	return -1;
1282     }
1283 }
1284 
1285 static PySequenceMethods RangeAsSeq = {
1286     (lenfunc)		RangeLength,	 /* sq_length,	  len(x)   */
1287     (binaryfunc)	0,		 /* RangeConcat, sq_concat,  x+y   */
1288     (ssizeargfunc)	0,		 /* RangeRepeat, sq_repeat,  x*n   */
1289     (ssizeargfunc)	RangeItem,	 /* sq_item,	  x[i]	   */
1290     0,					 /* was_sq_slice,     x[i:j]   */
1291     (ssizeobjargproc)	RangeAsItem,	 /* sq_as_item,  x[i]=v   */
1292     0,					 /* sq_ass_slice, x[i:j]=v */
1293     0,					 /* sq_contains */
1294     0,					 /* sq_inplace_concat */
1295     0,					 /* sq_inplace_repeat */
1296 };
1297 
1298 static PyMappingMethods RangeAsMapping = {
1299     /* mp_length	*/ (lenfunc)RangeLength,
1300     /* mp_subscript     */ (binaryfunc)RangeSubscript,
1301     /* mp_ass_subscript */ (objobjargproc)RangeAsSubscript,
1302 };
1303 
1304 /* Line range object - Implementation
1305  */
1306 
1307     static PyObject *
1308 RangeGetattro(PyObject *self, PyObject *nameobj)
1309 {
1310     GET_ATTR_STRING(name, nameobj);
1311 
1312     if (strcmp(name, "start") == 0)
1313 	return Py_BuildValue("n", ((RangeObject *)(self))->start - 1);
1314     else if (strcmp(name, "end") == 0)
1315 	return Py_BuildValue("n", ((RangeObject *)(self))->end - 1);
1316     else
1317 	return PyObject_GenericGetAttr(self, nameobj);
1318 }
1319 
1320 /****************/
1321 
1322     static Py_ssize_t
1323 RangeAsItem(PyObject *self, Py_ssize_t n, PyObject *val)
1324 {
1325     return RBAsItem(((RangeObject *)(self))->buf, n, val,
1326 		    ((RangeObject *)(self))->start,
1327 		    ((RangeObject *)(self))->end,
1328 		    &((RangeObject *)(self))->end);
1329 }
1330 
1331     static Py_ssize_t
1332 RangeAsSlice(PyObject *self, Py_ssize_t lo, Py_ssize_t hi, PyObject *val)
1333 {
1334     return RBAsSlice(((RangeObject *)(self))->buf, lo, hi, val,
1335 		    ((RangeObject *)(self))->start,
1336 		    ((RangeObject *)(self))->end,
1337 		    &((RangeObject *)(self))->end);
1338 }
1339 
1340     static PyObject *
1341 RangeSubscript(PyObject *self, PyObject* idx)
1342 {
1343     if (PyLong_Check(idx))
1344     {
1345 	long _idx = PyLong_AsLong(idx);
1346 	return RangeItem((RangeObject *)(self), _idx);
1347     } else if (PySlice_Check(idx))
1348     {
1349 	Py_ssize_t start, stop, step, slicelen;
1350 
1351 	if (PySlice_GetIndicesEx((PySliceObject_T *)idx,
1352 		((RangeObject *)(self))->end-((RangeObject *)(self))->start+1,
1353 		&start, &stop,
1354 		&step, &slicelen) < 0)
1355 	{
1356 	    return NULL;
1357 	}
1358 	return RangeSlice((RangeObject *)(self), start, stop);
1359     }
1360     else
1361     {
1362 	RAISE_INVALID_INDEX_TYPE(idx);
1363 	return NULL;
1364     }
1365 }
1366 
1367     static Py_ssize_t
1368 RangeAsSubscript(PyObject *self, PyObject *idx, PyObject *val)
1369 {
1370     if (PyLong_Check(idx))
1371     {
1372 	long n = PyLong_AsLong(idx);
1373 	return RangeAsItem(self, n, val);
1374     } else if (PySlice_Check(idx))
1375     {
1376 	Py_ssize_t start, stop, step, slicelen;
1377 
1378 	if (PySlice_GetIndicesEx((PySliceObject_T *)idx,
1379 		((RangeObject *)(self))->end-((RangeObject *)(self))->start+1,
1380 		&start, &stop,
1381 		&step, &slicelen) < 0)
1382 	{
1383 	    return -1;
1384 	}
1385 	return RangeAsSlice(self, start, stop, val);
1386     }
1387     else
1388     {
1389 	RAISE_INVALID_INDEX_TYPE(idx);
1390 	return -1;
1391     }
1392 }
1393 
1394 /* TabPage object - Implementation
1395  */
1396 
1397     static PyObject *
1398 TabPageGetattro(PyObject *self, PyObject *nameobj)
1399 {
1400     PyObject *r;
1401 
1402     GET_ATTR_STRING(name, nameobj);
1403 
1404     if ((r = TabPageAttrValid((TabPageObject *)(self), name)))
1405 	return r;
1406 
1407     if (CheckTabPage((TabPageObject *)(self)))
1408 	return NULL;
1409 
1410     r = TabPageAttr((TabPageObject *)(self), name);
1411     if (r || PyErr_Occurred())
1412 	return r;
1413     else
1414 	return PyObject_GenericGetAttr(self, nameobj);
1415 }
1416 
1417 /* Window object - Implementation
1418  */
1419 
1420     static PyObject *
1421 WindowGetattro(PyObject *self, PyObject *nameobj)
1422 {
1423     PyObject *r;
1424 
1425     GET_ATTR_STRING(name, nameobj);
1426 
1427     if ((r = WindowAttrValid((WindowObject *)(self), name)))
1428 	return r;
1429 
1430     if (CheckWindow((WindowObject *)(self)))
1431 	return NULL;
1432 
1433     r = WindowAttr((WindowObject *)(self), name);
1434     if (r || PyErr_Occurred())
1435 	return r;
1436     else
1437 	return PyObject_GenericGetAttr(self, nameobj);
1438 }
1439 
1440     static int
1441 WindowSetattro(PyObject *self, PyObject *nameobj, PyObject *val)
1442 {
1443     GET_ATTR_STRING(name, nameobj);
1444 
1445     return WindowSetattr((WindowObject *)(self), name, val);
1446 }
1447 
1448 /* Tab page list object - Definitions
1449  */
1450 
1451 static PySequenceMethods TabListAsSeq = {
1452     (lenfunc)	     TabListLength,	    /* sq_length,    len(x)   */
1453     (binaryfunc)     0,			    /* sq_concat,    x+y      */
1454     (ssizeargfunc)   0,			    /* sq_repeat,    x*n      */
1455     (ssizeargfunc)   TabListItem,	    /* sq_item,      x[i]     */
1456     0,					    /* sq_slice,     x[i:j]   */
1457     (ssizeobjargproc)0,			    /* sq_as_item,  x[i]=v   */
1458     0,					    /* sq_ass_slice, x[i:j]=v */
1459     0,					    /* sq_contains */
1460     0,					    /* sq_inplace_concat */
1461     0,					    /* sq_inplace_repeat */
1462 };
1463 
1464 /* Window list object - Definitions
1465  */
1466 
1467 static PySequenceMethods WinListAsSeq = {
1468     (lenfunc)	     WinListLength,	    /* sq_length,    len(x)   */
1469     (binaryfunc)     0,			    /* sq_concat,    x+y      */
1470     (ssizeargfunc)   0,			    /* sq_repeat,    x*n      */
1471     (ssizeargfunc)   WinListItem,	    /* sq_item,      x[i]     */
1472     0,					    /* sq_slice,     x[i:j]   */
1473     (ssizeobjargproc)0,			    /* sq_as_item,  x[i]=v   */
1474     0,					    /* sq_ass_slice, x[i:j]=v */
1475     0,					    /* sq_contains */
1476     0,					    /* sq_inplace_concat */
1477     0,					    /* sq_inplace_repeat */
1478 };
1479 
1480 /* Current items object - Implementation
1481  */
1482     static PyObject *
1483 CurrentGetattro(PyObject *self, PyObject *nameobj)
1484 {
1485     PyObject	*r;
1486     GET_ATTR_STRING(name, nameobj);
1487     if (!(r = CurrentGetattr(self, name)))
1488 	return PyObject_GenericGetAttr(self, nameobj);
1489     return r;
1490 }
1491 
1492     static int
1493 CurrentSetattro(PyObject *self, PyObject *nameobj, PyObject *value)
1494 {
1495     GET_ATTR_STRING(name, nameobj);
1496     return CurrentSetattr(self, name, value);
1497 }
1498 
1499 /* Dictionary object - Definitions
1500  */
1501 
1502     static PyObject *
1503 DictionaryGetattro(PyObject *self, PyObject *nameobj)
1504 {
1505     DictionaryObject	*this = ((DictionaryObject *) (self));
1506 
1507     GET_ATTR_STRING(name, nameobj);
1508 
1509     if (strcmp(name, "locked") == 0)
1510 	return PyLong_FromLong(this->dict->dv_lock);
1511     else if (strcmp(name, "scope") == 0)
1512 	return PyLong_FromLong(this->dict->dv_scope);
1513 
1514     return PyObject_GenericGetAttr(self, nameobj);
1515 }
1516 
1517     static int
1518 DictionarySetattro(PyObject *self, PyObject *nameobj, PyObject *val)
1519 {
1520     GET_ATTR_STRING(name, nameobj);
1521     return DictionarySetattr((DictionaryObject *)(self), name, val);
1522 }
1523 
1524 /* List object - Definitions
1525  */
1526 
1527     static PyObject *
1528 ListGetattro(PyObject *self, PyObject *nameobj)
1529 {
1530     GET_ATTR_STRING(name, nameobj);
1531 
1532     if (strcmp(name, "locked") == 0)
1533 	return PyLong_FromLong(((ListObject *) (self))->list->lv_lock);
1534 
1535     return PyObject_GenericGetAttr(self, nameobj);
1536 }
1537 
1538     static int
1539 ListSetattro(PyObject *self, PyObject *nameobj, PyObject *val)
1540 {
1541     GET_ATTR_STRING(name, nameobj);
1542     return ListSetattr((ListObject *)(self), name, val);
1543 }
1544 
1545 /* Function object - Definitions
1546  */
1547 
1548     static PyObject *
1549 FunctionGetattro(PyObject *self, PyObject *nameobj)
1550 {
1551     PyObject		*r;
1552     FunctionObject	*this = (FunctionObject *)(self);
1553 
1554     GET_ATTR_STRING(name, nameobj);
1555 
1556     r = FunctionAttr(this, name);
1557     if (r || PyErr_Occurred())
1558 	return r;
1559     else
1560 	return PyObject_GenericGetAttr(self, nameobj);
1561 }
1562 
1563 /* External interface
1564  */
1565 
1566     void
1567 python3_buffer_free(buf_T *buf)
1568 {
1569     if (BUF_PYTHON_REF(buf) != NULL)
1570     {
1571 	BufferObject *bp = BUF_PYTHON_REF(buf);
1572 	bp->buf = INVALID_BUFFER_VALUE;
1573 	BUF_PYTHON_REF(buf) = NULL;
1574     }
1575 }
1576 
1577     void
1578 python3_window_free(win_T *win)
1579 {
1580     if (WIN_PYTHON_REF(win) != NULL)
1581     {
1582 	WindowObject *wp = WIN_PYTHON_REF(win);
1583 	wp->win = INVALID_WINDOW_VALUE;
1584 	WIN_PYTHON_REF(win) = NULL;
1585     }
1586 }
1587 
1588     void
1589 python3_tabpage_free(tabpage_T *tab)
1590 {
1591     if (TAB_PYTHON_REF(tab) != NULL)
1592     {
1593 	TabPageObject *tp = TAB_PYTHON_REF(tab);
1594 	tp->tab = INVALID_TABPAGE_VALUE;
1595 	TAB_PYTHON_REF(tab) = NULL;
1596     }
1597 }
1598 
1599     static PyObject *
1600 Py3Init_vim(void)
1601 {
1602     /* The special value is removed from sys.path in Python3_Init(). */
1603     static wchar_t *(argv[2]) = {L"/must>not&exist/foo", NULL};
1604 
1605     if (init_types())
1606 	return NULL;
1607 
1608     /* Set sys.argv[] to avoid a crash in warn(). */
1609     PySys_SetArgv(1, argv);
1610 
1611     if ((vim_module = PyModule_Create(&vimmodule)) == NULL)
1612 	return NULL;
1613 
1614     if (populate_module(vim_module))
1615 	return NULL;
1616 
1617     if (init_sys_path())
1618 	return NULL;
1619 
1620     return vim_module;
1621 }
1622 
1623 /*************************************************************************
1624  * 4. Utility functions for handling the interface between Vim and Python.
1625  */
1626 
1627 /* Convert a Vim line into a Python string.
1628  * All internal newlines are replaced by null characters.
1629  *
1630  * On errors, the Python exception data is set, and NULL is returned.
1631  */
1632     static PyObject *
1633 LineToString(const char *str)
1634 {
1635     PyObject *result;
1636     Py_ssize_t len = strlen(str);
1637     char *tmp,*p;
1638 
1639     tmp = (char *)alloc((unsigned)(len+1));
1640     p = tmp;
1641     if (p == NULL)
1642     {
1643 	PyErr_NoMemory();
1644 	return NULL;
1645     }
1646 
1647     while (*str)
1648     {
1649 	if (*str == '\n')
1650 	    *p = '\0';
1651 	else
1652 	    *p = *str;
1653 
1654 	++p;
1655 	++str;
1656     }
1657     *p = '\0';
1658 
1659     result = PyUnicode_Decode(tmp, len, (char *)ENC_OPT, CODEC_ERROR_HANDLER);
1660 
1661     vim_free(tmp);
1662     return result;
1663 }
1664 
1665     void
1666 do_py3eval(char_u *str, typval_T *rettv)
1667 {
1668     DoPyCommand((char *) str,
1669 	    (rangeinitializer) init_range_eval,
1670 	    (runner) run_eval,
1671 	    (void *) rettv);
1672     if (rettv->v_type == VAR_UNKNOWN)
1673     {
1674 	rettv->v_type = VAR_NUMBER;
1675 	rettv->vval.v_number = 0;
1676     }
1677 }
1678 
1679     int
1680 set_ref_in_python3(int copyID)
1681 {
1682     return set_ref_in_py(copyID);
1683 }
1684