xref: /vim-8.2.3635/src/if_python3.c (revision 51ad4eaa) 
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(_WIN32) && 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 WIN3264
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 # define PySlice_GetIndicesEx py3_PySlice_GetIndicesEx
171 # define PyImport_ImportModule py3_PyImport_ImportModule
172 # define PyObject_Init py3__PyObject_Init
173 # define PyDict_New py3_PyDict_New
174 # define PyDict_GetItemString py3_PyDict_GetItemString
175 # define PyDict_Next py3_PyDict_Next
176 # define PyMapping_Check py3_PyMapping_Check
177 # ifndef PyMapping_Keys
178 #  define PyMapping_Keys py3_PyMapping_Keys
179 # endif
180 # define PyIter_Next py3_PyIter_Next
181 # define PyObject_GetIter py3_PyObject_GetIter
182 # define PyObject_Repr py3_PyObject_Repr
183 # define PyObject_GetItem py3_PyObject_GetItem
184 # define PyObject_IsTrue py3_PyObject_IsTrue
185 # define PyModule_GetDict py3_PyModule_GetDict
186 #undef PyRun_SimpleString
187 # define PyRun_SimpleString py3_PyRun_SimpleString
188 #undef PyRun_String
189 # define PyRun_String py3_PyRun_String
190 # define PyObject_GetAttrString py3_PyObject_GetAttrString
191 # define PyObject_HasAttrString py3_PyObject_HasAttrString
192 # define PyObject_SetAttrString py3_PyObject_SetAttrString
193 # define PyObject_CallFunctionObjArgs py3_PyObject_CallFunctionObjArgs
194 # define _PyObject_CallFunction_SizeT py3__PyObject_CallFunction_SizeT
195 # define PyObject_Call py3_PyObject_Call
196 # define PyEval_GetLocals py3_PyEval_GetLocals
197 # define PyEval_GetGlobals py3_PyEval_GetGlobals
198 # define PySys_SetObject py3_PySys_SetObject
199 # define PySys_GetObject py3_PySys_GetObject
200 # define PySys_SetArgv py3_PySys_SetArgv
201 # define PyType_Ready py3_PyType_Ready
202 #undef Py_BuildValue
203 # define Py_BuildValue py3_Py_BuildValue
204 # define Py_SetPythonHome py3_Py_SetPythonHome
205 # define Py_Initialize py3_Py_Initialize
206 # define Py_Finalize py3_Py_Finalize
207 # define Py_IsInitialized py3_Py_IsInitialized
208 # define _Py_NoneStruct (*py3__Py_NoneStruct)
209 # define _Py_FalseStruct (*py3__Py_FalseStruct)
210 # define _Py_TrueStruct (*py3__Py_TrueStruct)
211 # define _PyObject_NextNotImplemented (*py3__PyObject_NextNotImplemented)
212 # define PyModule_AddObject py3_PyModule_AddObject
213 # define PyImport_AppendInittab py3_PyImport_AppendInittab
214 # define PyImport_AddModule py3_PyImport_AddModule
215 # if PY_VERSION_HEX >= 0x030300f0
216 #  undef _PyUnicode_AsString
217 #  define _PyUnicode_AsString py3_PyUnicode_AsUTF8
218 # else
219 #  define _PyUnicode_AsString py3__PyUnicode_AsString
220 # endif
221 # undef PyUnicode_AsEncodedString
222 # define PyUnicode_AsEncodedString py3_PyUnicode_AsEncodedString
223 # undef PyBytes_AsString
224 # define PyBytes_AsString py3_PyBytes_AsString
225 # ifndef PyBytes_AsStringAndSize
226 #  define PyBytes_AsStringAndSize py3_PyBytes_AsStringAndSize
227 # endif
228 # undef PyBytes_FromString
229 # define PyBytes_FromString py3_PyBytes_FromString
230 # define PyFloat_FromDouble py3_PyFloat_FromDouble
231 # define PyFloat_AsDouble py3_PyFloat_AsDouble
232 # define PyObject_GenericGetAttr py3_PyObject_GenericGetAttr
233 # define PyType_Type (*py3_PyType_Type)
234 # define PySlice_Type (*py3_PySlice_Type)
235 # define PyFloat_Type (*py3_PyFloat_Type)
236 # define PyNumber_Check (*py3_PyNumber_Check)
237 # define PyNumber_Long (*py3_PyNumber_Long)
238 # define PyBool_Type (*py3_PyBool_Type)
239 # define PyErr_NewException py3_PyErr_NewException
240 # ifdef Py_DEBUG
241 #  define _Py_NegativeRefcount py3__Py_NegativeRefcount
242 #  define _Py_RefTotal (*py3__Py_RefTotal)
243 #  define _Py_Dealloc py3__Py_Dealloc
244 #  define PyModule_Create2TraceRefs py3_PyModule_Create2TraceRefs
245 # else
246 #  define PyModule_Create2 py3_PyModule_Create2
247 # endif
248 # if defined(Py_DEBUG) && !defined(Py_DEBUG_NO_PYMALLOC)
249 #  define _PyObject_DebugMalloc py3__PyObject_DebugMalloc
250 #  define _PyObject_DebugFree py3__PyObject_DebugFree
251 # else
252 #  define PyObject_Malloc py3_PyObject_Malloc
253 #  define PyObject_Free py3_PyObject_Free
254 # endif
255 # define _PyObject_GC_New py3__PyObject_GC_New
256 # define PyObject_GC_Del py3_PyObject_GC_Del
257 # define PyObject_GC_UnTrack py3_PyObject_GC_UnTrack
258 # define PyType_GenericAlloc py3_PyType_GenericAlloc
259 # define PyType_GenericNew py3_PyType_GenericNew
260 # undef PyUnicode_FromString
261 # define PyUnicode_FromString py3_PyUnicode_FromString
262 # ifndef PyUnicode_FromFormat
263 #  define PyUnicode_FromFormat py3_PyUnicode_FromFormat
264 # else
265 #  define Py_UNICODE_USE_UCS_FUNCTIONS
266 #  ifdef Py_UNICODE_WIDE
267 #   define PyUnicodeUCS4_FromFormat py3_PyUnicodeUCS4_FromFormat
268 #  else
269 #   define PyUnicodeUCS2_FromFormat py3_PyUnicodeUCS2_FromFormat
270 #  endif
271 # endif
272 # undef PyUnicode_Decode
273 # define PyUnicode_Decode py3_PyUnicode_Decode
274 # define PyType_IsSubtype py3_PyType_IsSubtype
275 # define PyCapsule_New py3_PyCapsule_New
276 # define PyCapsule_GetPointer py3_PyCapsule_GetPointer
277 
278 # if defined(Py_DEBUG) && !defined(Py_DEBUG_NO_PYMALLOC)
279 #  undef PyObject_NEW
280 #  define PyObject_NEW(type, typeobj) \
281 ( (type *) PyObject_Init( \
282 	(PyObject *) _PyObject_DebugMalloc( _PyObject_SIZE(typeobj) ), (typeobj)) )
283 # endif
284 
285 /*
286  * Pointers for dynamic link
287  */
288 static int (*py3_PySys_SetArgv)(int, wchar_t **);
289 static void (*py3_Py_SetPythonHome)(wchar_t *home);
290 static void (*py3_Py_Initialize)(void);
291 static PyObject* (*py3_PyList_New)(Py_ssize_t size);
292 static PyGILState_STATE (*py3_PyGILState_Ensure)(void);
293 static void (*py3_PyGILState_Release)(PyGILState_STATE);
294 static int (*py3_PySys_SetObject)(char *, PyObject *);
295 static PyObject* (*py3_PySys_GetObject)(char *);
296 static int (*py3_PyList_Append)(PyObject *, PyObject *);
297 static int (*py3_PyList_Insert)(PyObject *, int, PyObject *);
298 static Py_ssize_t (*py3_PyList_Size)(PyObject *);
299 static int (*py3_PySequence_Check)(PyObject *);
300 static Py_ssize_t (*py3_PySequence_Size)(PyObject *);
301 static PyObject* (*py3_PySequence_GetItem)(PyObject *, Py_ssize_t);
302 static PyObject* (*py3_PySequence_Fast)(PyObject *, const char *);
303 static Py_ssize_t (*py3_PyTuple_Size)(PyObject *);
304 static PyObject* (*py3_PyTuple_GetItem)(PyObject *, Py_ssize_t);
305 static int (*py3_PyMapping_Check)(PyObject *);
306 static PyObject* (*py3_PyMapping_Keys)(PyObject *);
307 static int (*py3_PySlice_GetIndicesEx)(PySliceObject_T *r, Py_ssize_t length,
308 		     Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step,
309 		     Py_ssize_t *slicelen);
310 static PyObject* (*py3_PyErr_NoMemory)(void);
311 static void (*py3_Py_Finalize)(void);
312 static void (*py3_PyErr_SetString)(PyObject *, const char *);
313 static void (*py3_PyErr_SetObject)(PyObject *, PyObject *);
314 static int (*py3_PyErr_ExceptionMatches)(PyObject *);
315 static int (*py3_PyRun_SimpleString)(char *);
316 static PyObject* (*py3_PyRun_String)(char *, int, PyObject *, PyObject *);
317 static PyObject* (*py3_PyObject_GetAttrString)(PyObject *, const char *);
318 static int (*py3_PyObject_HasAttrString)(PyObject *, const char *);
319 static int (*py3_PyObject_SetAttrString)(PyObject *, const char *, PyObject *);
320 static PyObject* (*py3_PyObject_CallFunctionObjArgs)(PyObject *, ...);
321 static PyObject* (*py3__PyObject_CallFunction_SizeT)(PyObject *, char *, ...);
322 static PyObject* (*py3_PyObject_Call)(PyObject *, PyObject *, PyObject *);
323 static PyObject* (*py3_PyEval_GetGlobals)();
324 static PyObject* (*py3_PyEval_GetLocals)();
325 static PyObject* (*py3_PyList_GetItem)(PyObject *, Py_ssize_t);
326 static PyObject* (*py3_PyImport_ImportModule)(const char *);
327 static PyObject* (*py3_PyImport_AddModule)(const char *);
328 static int (*py3_PyErr_BadArgument)(void);
329 static PyObject* (*py3_PyErr_Occurred)(void);
330 static PyObject* (*py3_PyModule_GetDict)(PyObject *);
331 static int (*py3_PyList_SetItem)(PyObject *, Py_ssize_t, PyObject *);
332 static PyObject* (*py3_PyDict_GetItemString)(PyObject *, const char *);
333 static int (*py3_PyDict_Next)(PyObject *, Py_ssize_t *, PyObject **, PyObject **);
334 static PyObject* (*py3_PyLong_FromLong)(long);
335 static PyObject* (*py3_PyDict_New)(void);
336 static PyObject* (*py3_PyIter_Next)(PyObject *);
337 static PyObject* (*py3_PyObject_GetIter)(PyObject *);
338 static PyObject* (*py3_PyObject_Repr)(PyObject *);
339 static PyObject* (*py3_PyObject_GetItem)(PyObject *, PyObject *);
340 static int (*py3_PyObject_IsTrue)(PyObject *);
341 static PyObject* (*py3_Py_BuildValue)(char *, ...);
342 static int (*py3_PyType_Ready)(PyTypeObject *type);
343 static int (*py3_PyDict_SetItemString)(PyObject *dp, char *key, PyObject *item);
344 static PyObject* (*py3_PyUnicode_FromString)(const char *u);
345 # ifndef Py_UNICODE_USE_UCS_FUNCTIONS
346 static PyObject* (*py3_PyUnicode_FromFormat)(const char *u, ...);
347 # else
348 #  ifdef Py_UNICODE_WIDE
349 static PyObject* (*py3_PyUnicodeUCS4_FromFormat)(const char *u, ...);
350 #  else
351 static PyObject* (*py3_PyUnicodeUCS2_FromFormat)(const char *u, ...);
352 #  endif
353 # endif
354 static PyObject* (*py3_PyUnicode_Decode)(const char *u, Py_ssize_t size,
355 	const char *encoding, const char *errors);
356 static long (*py3_PyLong_AsLong)(PyObject *);
357 static void (*py3_PyErr_SetNone)(PyObject *);
358 static void (*py3_PyEval_InitThreads)(void);
359 static void(*py3_PyEval_RestoreThread)(PyThreadState *);
360 static PyThreadState*(*py3_PyEval_SaveThread)(void);
361 static int (*py3_PyArg_Parse)(PyObject *, char *, ...);
362 static int (*py3_PyArg_ParseTuple)(PyObject *, char *, ...);
363 static int (*py3_PyMem_Free)(void *);
364 static void* (*py3_PyMem_Malloc)(size_t);
365 static int (*py3_Py_IsInitialized)(void);
366 static void (*py3_PyErr_Clear)(void);
367 static PyObject* (*py3_PyErr_Format)(PyObject *, const char *, ...);
368 static void (*py3_PyErr_PrintEx)(int);
369 static PyObject*(*py3__PyObject_Init)(PyObject *, PyTypeObject *);
370 static iternextfunc py3__PyObject_NextNotImplemented;
371 static PyObject* py3__Py_NoneStruct;
372 static PyObject* py3__Py_FalseStruct;
373 static PyObject* py3__Py_TrueStruct;
374 static int (*py3_PyModule_AddObject)(PyObject *m, const char *name, PyObject *o);
375 static int (*py3_PyImport_AppendInittab)(const char *name, PyObject* (*initfunc)(void));
376 # if PY_VERSION_HEX >= 0x030300f0
377 static char* (*py3_PyUnicode_AsUTF8)(PyObject *unicode);
378 # else
379 static char* (*py3__PyUnicode_AsString)(PyObject *unicode);
380 # endif
381 static PyObject* (*py3_PyUnicode_AsEncodedString)(PyObject *unicode, const char* encoding, const char* errors);
382 static char* (*py3_PyBytes_AsString)(PyObject *bytes);
383 static int (*py3_PyBytes_AsStringAndSize)(PyObject *bytes, char **buffer, Py_ssize_t *length);
384 static PyObject* (*py3_PyBytes_FromString)(char *str);
385 static PyObject* (*py3_PyFloat_FromDouble)(double num);
386 static double (*py3_PyFloat_AsDouble)(PyObject *);
387 static PyObject* (*py3_PyObject_GenericGetAttr)(PyObject *obj, PyObject *name);
388 static PyObject* (*py3_PyType_GenericAlloc)(PyTypeObject *type, Py_ssize_t nitems);
389 static PyObject* (*py3_PyType_GenericNew)(PyTypeObject *type, PyObject *args, PyObject *kwds);
390 static PyTypeObject* py3_PyType_Type;
391 static PyTypeObject* py3_PySlice_Type;
392 static PyTypeObject* py3_PyFloat_Type;
393 static PyTypeObject* py3_PyBool_Type;
394 static int (*py3_PyNumber_Check)(PyObject *);
395 static PyObject* (*py3_PyNumber_Long)(PyObject *);
396 static PyObject* (*py3_PyErr_NewException)(char *name, PyObject *base, PyObject *dict);
397 static PyObject* (*py3_PyCapsule_New)(void *, char *, PyCapsule_Destructor);
398 static void* (*py3_PyCapsule_GetPointer)(PyObject *, char *);
399 # ifdef Py_DEBUG
400 static void (*py3__Py_NegativeRefcount)(const char *fname, int lineno, PyObject *op);
401 static Py_ssize_t* py3__Py_RefTotal;
402 static void (*py3__Py_Dealloc)(PyObject *obj);
403 static PyObject* (*py3_PyModule_Create2TraceRefs)(struct PyModuleDef* module, int module_api_version);
404 # else
405 static PyObject* (*py3_PyModule_Create2)(struct PyModuleDef* module, int module_api_version);
406 # endif
407 # if defined(Py_DEBUG) && !defined(Py_DEBUG_NO_PYMALLOC)
408 static void (*py3__PyObject_DebugFree)(void*);
409 static void* (*py3__PyObject_DebugMalloc)(size_t);
410 # else
411 static void (*py3_PyObject_Free)(void*);
412 static void* (*py3_PyObject_Malloc)(size_t);
413 # endif
414 static PyObject*(*py3__PyObject_GC_New)(PyTypeObject *);
415 static void(*py3_PyObject_GC_Del)(void *);
416 static void(*py3_PyObject_GC_UnTrack)(void *);
417 static int (*py3_PyType_IsSubtype)(PyTypeObject *, PyTypeObject *);
418 
419 static HINSTANCE hinstPy3 = 0; /* Instance of python.dll */
420 
421 /* Imported exception objects */
422 static PyObject *p3imp_PyExc_AttributeError;
423 static PyObject *p3imp_PyExc_IndexError;
424 static PyObject *p3imp_PyExc_KeyError;
425 static PyObject *p3imp_PyExc_KeyboardInterrupt;
426 static PyObject *p3imp_PyExc_TypeError;
427 static PyObject *p3imp_PyExc_ValueError;
428 static PyObject *p3imp_PyExc_SystemExit;
429 static PyObject *p3imp_PyExc_RuntimeError;
430 static PyObject *p3imp_PyExc_ImportError;
431 static PyObject *p3imp_PyExc_OverflowError;
432 
433 # define PyExc_AttributeError p3imp_PyExc_AttributeError
434 # define PyExc_IndexError p3imp_PyExc_IndexError
435 # define PyExc_KeyError p3imp_PyExc_KeyError
436 # define PyExc_KeyboardInterrupt p3imp_PyExc_KeyboardInterrupt
437 # define PyExc_TypeError p3imp_PyExc_TypeError
438 # define PyExc_ValueError p3imp_PyExc_ValueError
439 # define PyExc_SystemExit p3imp_PyExc_SystemExit
440 # define PyExc_RuntimeError p3imp_PyExc_RuntimeError
441 # define PyExc_ImportError p3imp_PyExc_ImportError
442 # define PyExc_OverflowError p3imp_PyExc_OverflowError
443 
444 /*
445  * Table of name to function pointer of python.
446  */
447 # define PYTHON_PROC FARPROC
448 static struct
449 {
450     char *name;
451     PYTHON_PROC *ptr;
452 } py3_funcname_table[] =
453 {
454     {"PySys_SetArgv", (PYTHON_PROC*)&py3_PySys_SetArgv},
455     {"Py_SetPythonHome", (PYTHON_PROC*)&py3_Py_SetPythonHome},
456     {"Py_Initialize", (PYTHON_PROC*)&py3_Py_Initialize},
457     {"_PyArg_ParseTuple_SizeT", (PYTHON_PROC*)&py3_PyArg_ParseTuple},
458     {"_Py_BuildValue_SizeT", (PYTHON_PROC*)&py3_Py_BuildValue},
459     {"PyMem_Free", (PYTHON_PROC*)&py3_PyMem_Free},
460     {"PyMem_Malloc", (PYTHON_PROC*)&py3_PyMem_Malloc},
461     {"PyList_New", (PYTHON_PROC*)&py3_PyList_New},
462     {"PyGILState_Ensure", (PYTHON_PROC*)&py3_PyGILState_Ensure},
463     {"PyGILState_Release", (PYTHON_PROC*)&py3_PyGILState_Release},
464     {"PySys_SetObject", (PYTHON_PROC*)&py3_PySys_SetObject},
465     {"PySys_GetObject", (PYTHON_PROC*)&py3_PySys_GetObject},
466     {"PyList_Append", (PYTHON_PROC*)&py3_PyList_Append},
467     {"PyList_Insert", (PYTHON_PROC*)&py3_PyList_Insert},
468     {"PyList_Size", (PYTHON_PROC*)&py3_PyList_Size},
469     {"PySequence_Check", (PYTHON_PROC*)&py3_PySequence_Check},
470     {"PySequence_Size", (PYTHON_PROC*)&py3_PySequence_Size},
471     {"PySequence_GetItem", (PYTHON_PROC*)&py3_PySequence_GetItem},
472     {"PySequence_Fast", (PYTHON_PROC*)&py3_PySequence_Fast},
473     {"PyTuple_Size", (PYTHON_PROC*)&py3_PyTuple_Size},
474     {"PyTuple_GetItem", (PYTHON_PROC*)&py3_PyTuple_GetItem},
475     {"PySlice_GetIndicesEx", (PYTHON_PROC*)&py3_PySlice_GetIndicesEx},
476     {"PyErr_NoMemory", (PYTHON_PROC*)&py3_PyErr_NoMemory},
477     {"Py_Finalize", (PYTHON_PROC*)&py3_Py_Finalize},
478     {"PyErr_SetString", (PYTHON_PROC*)&py3_PyErr_SetString},
479     {"PyErr_SetObject", (PYTHON_PROC*)&py3_PyErr_SetObject},
480     {"PyErr_ExceptionMatches", (PYTHON_PROC*)&py3_PyErr_ExceptionMatches},
481     {"PyRun_SimpleString", (PYTHON_PROC*)&py3_PyRun_SimpleString},
482     {"PyRun_String", (PYTHON_PROC*)&py3_PyRun_String},
483     {"PyObject_GetAttrString", (PYTHON_PROC*)&py3_PyObject_GetAttrString},
484     {"PyObject_HasAttrString", (PYTHON_PROC*)&py3_PyObject_HasAttrString},
485     {"PyObject_SetAttrString", (PYTHON_PROC*)&py3_PyObject_SetAttrString},
486     {"PyObject_CallFunctionObjArgs", (PYTHON_PROC*)&py3_PyObject_CallFunctionObjArgs},
487     {"_PyObject_CallFunction_SizeT", (PYTHON_PROC*)&py3__PyObject_CallFunction_SizeT},
488     {"PyObject_Call", (PYTHON_PROC*)&py3_PyObject_Call},
489     {"PyEval_GetGlobals", (PYTHON_PROC*)&py3_PyEval_GetGlobals},
490     {"PyEval_GetLocals", (PYTHON_PROC*)&py3_PyEval_GetLocals},
491     {"PyList_GetItem", (PYTHON_PROC*)&py3_PyList_GetItem},
492     {"PyImport_ImportModule", (PYTHON_PROC*)&py3_PyImport_ImportModule},
493     {"PyImport_AddModule", (PYTHON_PROC*)&py3_PyImport_AddModule},
494     {"PyErr_BadArgument", (PYTHON_PROC*)&py3_PyErr_BadArgument},
495     {"PyErr_Occurred", (PYTHON_PROC*)&py3_PyErr_Occurred},
496     {"PyModule_GetDict", (PYTHON_PROC*)&py3_PyModule_GetDict},
497     {"PyList_SetItem", (PYTHON_PROC*)&py3_PyList_SetItem},
498     {"PyDict_GetItemString", (PYTHON_PROC*)&py3_PyDict_GetItemString},
499     {"PyDict_Next", (PYTHON_PROC*)&py3_PyDict_Next},
500     {"PyMapping_Check", (PYTHON_PROC*)&py3_PyMapping_Check},
501     {"PyMapping_Keys", (PYTHON_PROC*)&py3_PyMapping_Keys},
502     {"PyIter_Next", (PYTHON_PROC*)&py3_PyIter_Next},
503     {"PyObject_GetIter", (PYTHON_PROC*)&py3_PyObject_GetIter},
504     {"PyObject_Repr", (PYTHON_PROC*)&py3_PyObject_Repr},
505     {"PyObject_GetItem", (PYTHON_PROC*)&py3_PyObject_GetItem},
506     {"PyObject_IsTrue", (PYTHON_PROC*)&py3_PyObject_IsTrue},
507     {"PyLong_FromLong", (PYTHON_PROC*)&py3_PyLong_FromLong},
508     {"PyDict_New", (PYTHON_PROC*)&py3_PyDict_New},
509     {"PyType_Ready", (PYTHON_PROC*)&py3_PyType_Ready},
510     {"PyDict_SetItemString", (PYTHON_PROC*)&py3_PyDict_SetItemString},
511     {"PyLong_AsLong", (PYTHON_PROC*)&py3_PyLong_AsLong},
512     {"PyErr_SetNone", (PYTHON_PROC*)&py3_PyErr_SetNone},
513     {"PyEval_InitThreads", (PYTHON_PROC*)&py3_PyEval_InitThreads},
514     {"PyEval_RestoreThread", (PYTHON_PROC*)&py3_PyEval_RestoreThread},
515     {"PyEval_SaveThread", (PYTHON_PROC*)&py3_PyEval_SaveThread},
516     {"_PyArg_Parse_SizeT", (PYTHON_PROC*)&py3_PyArg_Parse},
517     {"Py_IsInitialized", (PYTHON_PROC*)&py3_Py_IsInitialized},
518     {"_PyObject_NextNotImplemented", (PYTHON_PROC*)&py3__PyObject_NextNotImplemented},
519     {"_Py_NoneStruct", (PYTHON_PROC*)&py3__Py_NoneStruct},
520     {"_Py_FalseStruct", (PYTHON_PROC*)&py3__Py_FalseStruct},
521     {"_Py_TrueStruct", (PYTHON_PROC*)&py3__Py_TrueStruct},
522     {"PyErr_Clear", (PYTHON_PROC*)&py3_PyErr_Clear},
523     {"PyErr_Format", (PYTHON_PROC*)&py3_PyErr_Format},
524     {"PyErr_PrintEx", (PYTHON_PROC*)&py3_PyErr_PrintEx},
525     {"PyObject_Init", (PYTHON_PROC*)&py3__PyObject_Init},
526     {"PyModule_AddObject", (PYTHON_PROC*)&py3_PyModule_AddObject},
527     {"PyImport_AppendInittab", (PYTHON_PROC*)&py3_PyImport_AppendInittab},
528 # if PY_VERSION_HEX >= 0x030300f0
529     {"PyUnicode_AsUTF8", (PYTHON_PROC*)&py3_PyUnicode_AsUTF8},
530 # else
531     {"_PyUnicode_AsString", (PYTHON_PROC*)&py3__PyUnicode_AsString},
532 # endif
533 # ifndef Py_UNICODE_USE_UCS_FUNCTIONS
534     {"PyUnicode_FromFormat", (PYTHON_PROC*)&py3_PyUnicode_FromFormat},
535 # else
536 #  ifdef Py_UNICODE_WIDE
537     {"PyUnicodeUCS4_FromFormat", (PYTHON_PROC*)&py3_PyUnicodeUCS4_FromFormat},
538 #  else
539     {"PyUnicodeUCS2_FromFormat", (PYTHON_PROC*)&py3_PyUnicodeUCS2_FromFormat},
540 #  endif
541 # endif
542     {"PyBytes_AsString", (PYTHON_PROC*)&py3_PyBytes_AsString},
543     {"PyBytes_AsStringAndSize", (PYTHON_PROC*)&py3_PyBytes_AsStringAndSize},
544     {"PyBytes_FromString", (PYTHON_PROC*)&py3_PyBytes_FromString},
545     {"PyFloat_FromDouble", (PYTHON_PROC*)&py3_PyFloat_FromDouble},
546     {"PyFloat_AsDouble", (PYTHON_PROC*)&py3_PyFloat_AsDouble},
547     {"PyObject_GenericGetAttr", (PYTHON_PROC*)&py3_PyObject_GenericGetAttr},
548     {"PyType_GenericAlloc", (PYTHON_PROC*)&py3_PyType_GenericAlloc},
549     {"PyType_GenericNew", (PYTHON_PROC*)&py3_PyType_GenericNew},
550     {"PyType_Type", (PYTHON_PROC*)&py3_PyType_Type},
551     {"PySlice_Type", (PYTHON_PROC*)&py3_PySlice_Type},
552     {"PyFloat_Type", (PYTHON_PROC*)&py3_PyFloat_Type},
553     {"PyBool_Type", (PYTHON_PROC*)&py3_PyBool_Type},
554     {"PyNumber_Check", (PYTHON_PROC*)&py3_PyNumber_Check},
555     {"PyNumber_Long", (PYTHON_PROC*)&py3_PyNumber_Long},
556     {"PyErr_NewException", (PYTHON_PROC*)&py3_PyErr_NewException},
557 # ifdef Py_DEBUG
558     {"_Py_NegativeRefcount", (PYTHON_PROC*)&py3__Py_NegativeRefcount},
559     {"_Py_RefTotal", (PYTHON_PROC*)&py3__Py_RefTotal},
560     {"_Py_Dealloc", (PYTHON_PROC*)&py3__Py_Dealloc},
561     {"PyModule_Create2TraceRefs", (PYTHON_PROC*)&py3_PyModule_Create2TraceRefs},
562 # else
563     {"PyModule_Create2", (PYTHON_PROC*)&py3_PyModule_Create2},
564 # endif
565 # if defined(Py_DEBUG) && !defined(Py_DEBUG_NO_PYMALLOC)
566     {"_PyObject_DebugFree", (PYTHON_PROC*)&py3__PyObject_DebugFree},
567     {"_PyObject_DebugMalloc", (PYTHON_PROC*)&py3__PyObject_DebugMalloc},
568 # else
569     {"PyObject_Malloc", (PYTHON_PROC*)&py3_PyObject_Malloc},
570     {"PyObject_Free", (PYTHON_PROC*)&py3_PyObject_Free},
571 # endif
572     {"_PyObject_GC_New", (PYTHON_PROC*)&py3__PyObject_GC_New},
573     {"PyObject_GC_Del", (PYTHON_PROC*)&py3_PyObject_GC_Del},
574     {"PyObject_GC_UnTrack", (PYTHON_PROC*)&py3_PyObject_GC_UnTrack},
575     {"PyType_IsSubtype", (PYTHON_PROC*)&py3_PyType_IsSubtype},
576     {"PyCapsule_New", (PYTHON_PROC*)&py3_PyCapsule_New},
577     {"PyCapsule_GetPointer", (PYTHON_PROC*)&py3_PyCapsule_GetPointer},
578     {"", NULL},
579 };
580 
581 /*
582  * Free python.dll
583  */
584     static void
585 end_dynamic_python3(void)
586 {
587     if (hinstPy3 != 0)
588     {
589 	close_dll(hinstPy3);
590 	hinstPy3 = 0;
591     }
592 }
593 
594 /*
595  * Load library and get all pointers.
596  * Parameter 'libname' provides name of DLL.
597  * Return OK or FAIL.
598  */
599     static int
600 py3_runtime_link_init(char *libname, int verbose)
601 {
602     int i;
603     PYTHON_PROC *ucs_from_string = (PYTHON_PROC *)&py3_PyUnicode_FromString;
604     PYTHON_PROC *ucs_decode = (PYTHON_PROC *)&py3_PyUnicode_Decode;
605     PYTHON_PROC *ucs_as_encoded_string =
606 				 (PYTHON_PROC *)&py3_PyUnicode_AsEncodedString;
607 
608 # if !(defined(PY_NO_RTLD_GLOBAL) && defined(PY3_NO_RTLD_GLOBAL)) && defined(UNIX) && defined(FEAT_PYTHON)
609     /* Can't have Python and Python3 loaded at the same time.
610      * It cause a crash, because RTLD_GLOBAL is needed for
611      * standard C extension libraries of one or both python versions. */
612     if (python_loaded())
613     {
614 	if (verbose)
615 	    EMSG(_("E837: This Vim cannot execute :py3 after using :python"));
616 	return FAIL;
617     }
618 # endif
619 
620     if (hinstPy3 != 0)
621 	return OK;
622     hinstPy3 = load_dll(libname);
623 
624     if (!hinstPy3)
625     {
626 	if (verbose)
627 	    EMSG2(_(e_loadlib), libname);
628 	return FAIL;
629     }
630 
631     for (i = 0; py3_funcname_table[i].ptr; ++i)
632     {
633 	if ((*py3_funcname_table[i].ptr = symbol_from_dll(hinstPy3,
634 			py3_funcname_table[i].name)) == NULL)
635 	{
636 	    close_dll(hinstPy3);
637 	    hinstPy3 = 0;
638 	    if (verbose)
639 		EMSG2(_(e_loadfunc), py3_funcname_table[i].name);
640 	    return FAIL;
641 	}
642     }
643 
644     /* Load unicode functions separately as only the ucs2 or the ucs4 functions
645      * will be present in the library. */
646 # if PY_VERSION_HEX >= 0x030300f0
647     *ucs_from_string = symbol_from_dll(hinstPy3, "PyUnicode_FromString");
648     *ucs_decode = symbol_from_dll(hinstPy3, "PyUnicode_Decode");
649     *ucs_as_encoded_string = symbol_from_dll(hinstPy3,
650 	    "PyUnicode_AsEncodedString");
651 # else
652     *ucs_from_string = symbol_from_dll(hinstPy3, "PyUnicodeUCS2_FromString");
653     *ucs_decode = symbol_from_dll(hinstPy3,
654 	    "PyUnicodeUCS2_Decode");
655     *ucs_as_encoded_string = symbol_from_dll(hinstPy3,
656 	    "PyUnicodeUCS2_AsEncodedString");
657     if (*ucs_from_string == NULL || *ucs_decode == NULL
658 					     || *ucs_as_encoded_string == NULL)
659     {
660 	*ucs_from_string = symbol_from_dll(hinstPy3,
661 		"PyUnicodeUCS4_FromString");
662 	*ucs_decode = symbol_from_dll(hinstPy3,
663 		"PyUnicodeUCS4_Decode");
664 	*ucs_as_encoded_string = symbol_from_dll(hinstPy3,
665 		"PyUnicodeUCS4_AsEncodedString");
666     }
667 # endif
668     if (*ucs_from_string == NULL || *ucs_decode == NULL
669 					     || *ucs_as_encoded_string == NULL)
670     {
671 	close_dll(hinstPy3);
672 	hinstPy3 = 0;
673 	if (verbose)
674 	    EMSG2(_(e_loadfunc), "PyUnicode_UCSX_*");
675 	return FAIL;
676     }
677 
678     return OK;
679 }
680 
681 /*
682  * If python is enabled (there is installed python on Windows system) return
683  * TRUE, else FALSE.
684  */
685     int
686 python3_enabled(int verbose)
687 {
688     return py3_runtime_link_init((char *)p_py3dll, verbose) == OK;
689 }
690 
691 /* Load the standard Python exceptions - don't import the symbols from the
692  * DLL, as this can cause errors (importing data symbols is not reliable).
693  */
694 static void get_py3_exceptions(void);
695 
696     static void
697 get_py3_exceptions(void)
698 {
699     PyObject *exmod = PyImport_ImportModule("builtins");
700     PyObject *exdict = PyModule_GetDict(exmod);
701     p3imp_PyExc_AttributeError = PyDict_GetItemString(exdict, "AttributeError");
702     p3imp_PyExc_IndexError = PyDict_GetItemString(exdict, "IndexError");
703     p3imp_PyExc_KeyError = PyDict_GetItemString(exdict, "KeyError");
704     p3imp_PyExc_KeyboardInterrupt = PyDict_GetItemString(exdict, "KeyboardInterrupt");
705     p3imp_PyExc_TypeError = PyDict_GetItemString(exdict, "TypeError");
706     p3imp_PyExc_ValueError = PyDict_GetItemString(exdict, "ValueError");
707     p3imp_PyExc_SystemExit = PyDict_GetItemString(exdict, "SystemExit");
708     p3imp_PyExc_RuntimeError = PyDict_GetItemString(exdict, "RuntimeError");
709     p3imp_PyExc_ImportError = PyDict_GetItemString(exdict, "ImportError");
710     p3imp_PyExc_OverflowError = PyDict_GetItemString(exdict, "OverflowError");
711     Py_XINCREF(p3imp_PyExc_AttributeError);
712     Py_XINCREF(p3imp_PyExc_IndexError);
713     Py_XINCREF(p3imp_PyExc_KeyError);
714     Py_XINCREF(p3imp_PyExc_KeyboardInterrupt);
715     Py_XINCREF(p3imp_PyExc_TypeError);
716     Py_XINCREF(p3imp_PyExc_ValueError);
717     Py_XINCREF(p3imp_PyExc_SystemExit);
718     Py_XINCREF(p3imp_PyExc_RuntimeError);
719     Py_XINCREF(p3imp_PyExc_ImportError);
720     Py_XINCREF(p3imp_PyExc_OverflowError);
721     Py_XDECREF(exmod);
722 }
723 #endif /* DYNAMIC_PYTHON3 */
724 
725 static int py3initialised = 0;
726 #define PYINITIALISED py3initialised
727 static int python_end_called = FALSE;
728 
729 #define DESTRUCTOR_FINISH(self) Py_TYPE(self)->tp_free((PyObject*)self)
730 
731 #define WIN_PYTHON_REF(win) win->w_python3_ref
732 #define BUF_PYTHON_REF(buf) buf->b_python3_ref
733 #define TAB_PYTHON_REF(tab) tab->tp_python3_ref
734 
735     static void
736 call_PyObject_Free(void *p)
737 {
738 #if defined(Py_DEBUG) && !defined(Py_DEBUG_NO_PYMALLOC)
739     _PyObject_DebugFree(p);
740 #else
741     PyObject_Free(p);
742 #endif
743 }
744 
745     static PyObject *
746 call_PyType_GenericNew(PyTypeObject *type, PyObject *args, PyObject *kwds)
747 {
748     return PyType_GenericNew(type,args,kwds);
749 }
750 
751     static PyObject *
752 call_PyType_GenericAlloc(PyTypeObject *type, Py_ssize_t nitems)
753 {
754     return PyType_GenericAlloc(type,nitems);
755 }
756 
757 static PyObject *OutputGetattro(PyObject *, PyObject *);
758 static int OutputSetattro(PyObject *, PyObject *, PyObject *);
759 static PyObject *BufferGetattro(PyObject *, PyObject *);
760 static int BufferSetattro(PyObject *, PyObject *, PyObject *);
761 static PyObject *TabPageGetattro(PyObject *, PyObject *);
762 static PyObject *WindowGetattro(PyObject *, PyObject *);
763 static int WindowSetattro(PyObject *, PyObject *, PyObject *);
764 static PyObject *RangeGetattro(PyObject *, PyObject *);
765 static PyObject *CurrentGetattro(PyObject *, PyObject *);
766 static int CurrentSetattro(PyObject *, PyObject *, PyObject *);
767 static PyObject *DictionaryGetattro(PyObject *, PyObject *);
768 static int DictionarySetattro(PyObject *, PyObject *, PyObject *);
769 static PyObject *ListGetattro(PyObject *, PyObject *);
770 static int ListSetattro(PyObject *, PyObject *, PyObject *);
771 static PyObject *FunctionGetattro(PyObject *, PyObject *);
772 
773 static PyObject *VimPathHook(PyObject *, PyObject *);
774 
775 static struct PyModuleDef vimmodule;
776 
777 #define PY_CAN_RECURSE
778 
779 /*
780  * Include the code shared with if_python.c
781  */
782 #include "if_py_both.h"
783 
784 #define GET_ATTR_STRING(name, nameobj) \
785     char	*name = ""; \
786     if (PyUnicode_Check(nameobj)) \
787 	name = _PyUnicode_AsString(nameobj)
788 
789 #define PY3OBJ_DELETED(obj) (obj->ob_base.ob_refcnt<=0)
790 
791 /******************************************************
792  * Internal function prototypes.
793  */
794 
795 static PyObject *Py3Init_vim(void);
796 
797 /******************************************************
798  * 1. Python interpreter main program.
799  */
800 
801     void
802 python3_end(void)
803 {
804     static int recurse = 0;
805 
806     /* If a crash occurs while doing this, don't try again. */
807     if (recurse != 0)
808 	return;
809 
810     python_end_called = TRUE;
811     ++recurse;
812 
813 #ifdef DYNAMIC_PYTHON3
814     if (hinstPy3)
815 #endif
816     if (Py_IsInitialized())
817     {
818 	// acquire lock before finalizing
819 	PyGILState_Ensure();
820 
821 	Py_Finalize();
822     }
823 
824 #ifdef DYNAMIC_PYTHON3
825     end_dynamic_python3();
826 #endif
827 
828     --recurse;
829 }
830 
831 #if (defined(DYNAMIC_PYTHON3) && defined(DYNAMIC_PYTHON) && defined(FEAT_PYTHON) && defined(UNIX)) || defined(PROTO)
832     int
833 python3_loaded(void)
834 {
835     return (hinstPy3 != 0);
836 }
837 #endif
838 
839 static wchar_t *py_home_buf = NULL;
840 
841     static int
842 Python3_Init(void)
843 {
844     if (!py3initialised)
845     {
846 #ifdef DYNAMIC_PYTHON3
847 	if (!python3_enabled(TRUE))
848 	{
849 	    EMSG(_("E263: Sorry, this command is disabled, the Python library could not be loaded."));
850 	    goto fail;
851 	}
852 #endif
853 
854 	init_structs();
855 
856 	if (*p_py3home != NUL)
857 	{
858 	    size_t len = mbstowcs(NULL, (char *)p_py3home, 0) + 1;
859 
860 	    /* The string must not change later, make a copy in static memory. */
861 	    py_home_buf = (wchar_t *)alloc(len * sizeof(wchar_t));
862 	    if (py_home_buf != NULL && mbstowcs(
863 			    py_home_buf, (char *)p_py3home, len) != (size_t)-1)
864 		Py_SetPythonHome(py_home_buf);
865 	}
866 #ifdef PYTHON3_HOME
867 	else if (mch_getenv((char_u *)"PYTHONHOME") == NULL)
868 	    Py_SetPythonHome(PYTHON3_HOME);
869 #endif
870 
871 	PyImport_AppendInittab("vim", Py3Init_vim);
872 
873 	Py_Initialize();
874 
875 	/* Initialise threads, and below save the state using
876 	 * PyEval_SaveThread.  Without the call to PyEval_SaveThread, thread
877 	 * specific state (such as the system trace hook), will be lost
878 	 * between invocations of Python code. */
879 	PyEval_InitThreads();
880 #ifdef DYNAMIC_PYTHON3
881 	get_py3_exceptions();
882 #endif
883 
884 	if (PythonIO_Init_io())
885 	    goto fail;
886 
887 	globals = PyModule_GetDict(PyImport_AddModule("__main__"));
888 
889 	/* Remove the element from sys.path that was added because of our
890 	 * argv[0] value in Py3Init_vim().  Previously we used an empty
891 	 * string, but depending on the OS we then get an empty entry or
892 	 * the current directory in sys.path.
893 	 * Only after vim has been imported, the element does exist in
894 	 * sys.path.
895 	 */
896 	PyRun_SimpleString("import vim; import sys; sys.path = list(filter(lambda x: not x.endswith('must>not&exist'), sys.path))");
897 
898 	/* lock is created and acquired in PyEval_InitThreads() and thread
899 	 * state is created in Py_Initialize()
900 	 * there _PyGILState_NoteThreadState() also sets gilcounter to 1
901 	 * (python must have threads enabled!)
902 	 * so the following does both: unlock GIL and save thread state in TLS
903 	 * without deleting thread state
904 	 */
905 	PyEval_SaveThread();
906 
907 	py3initialised = 1;
908     }
909 
910     return 0;
911 
912 fail:
913     /* We call PythonIO_Flush() here to print any Python errors.
914      * This is OK, as it is possible to call this function even
915      * if PythonIO_Init_io() has not completed successfully (it will
916      * not do anything in this case).
917      */
918     PythonIO_Flush();
919     return -1;
920 }
921 
922 /*
923  * External interface
924  */
925     static void
926 DoPyCommand(const char *cmd, rangeinitializer init_range, runner run, void *arg)
927 {
928 #if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
929     char		*saved_locale;
930 #endif
931     PyObject		*cmdstr;
932     PyObject		*cmdbytes;
933     PyGILState_STATE	pygilstate;
934 
935     if (python_end_called)
936 	goto theend;
937 
938     if (Python3_Init())
939 	goto theend;
940 
941     init_range(arg);
942 
943     Python_Release_Vim();	    /* leave vim */
944 
945 #if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
946     /* Python only works properly when the LC_NUMERIC locale is "C". */
947     saved_locale = setlocale(LC_NUMERIC, NULL);
948     if (saved_locale == NULL || STRCMP(saved_locale, "C") == 0)
949 	saved_locale = NULL;
950     else
951     {
952 	/* Need to make a copy, value may change when setting new locale. */
953 	saved_locale = (char *)vim_strsave((char_u *)saved_locale);
954 	(void)setlocale(LC_NUMERIC, "C");
955     }
956 #endif
957 
958     pygilstate = PyGILState_Ensure();
959 
960     /* PyRun_SimpleString expects a UTF-8 string. Wrong encoding may cause
961      * SyntaxError (unicode error). */
962     cmdstr = PyUnicode_Decode(cmd, strlen(cmd),
963 					(char *)ENC_OPT, CODEC_ERROR_HANDLER);
964     cmdbytes = PyUnicode_AsEncodedString(cmdstr, "utf-8", CODEC_ERROR_HANDLER);
965     Py_XDECREF(cmdstr);
966 
967     run(PyBytes_AsString(cmdbytes), arg, &pygilstate);
968     Py_XDECREF(cmdbytes);
969 
970     PyGILState_Release(pygilstate);
971 
972 #if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
973     if (saved_locale != NULL)
974     {
975 	(void)setlocale(LC_NUMERIC, saved_locale);
976 	vim_free(saved_locale);
977     }
978 #endif
979 
980     Python_Lock_Vim();		    /* enter vim */
981     PythonIO_Flush();
982 
983 theend:
984     return;	    /* keeps lint happy */
985 }
986 
987 /*
988  * ":py3"
989  */
990     void
991 ex_py3(exarg_T *eap)
992 {
993     char_u *script;
994 
995     if (p_pyx == 0)
996 	p_pyx = 3;
997 
998     script = script_get(eap, eap->arg);
999     if (!eap->skip)
1000     {
1001 	DoPyCommand(script == NULL ? (char *) eap->arg : (char *) script,
1002 		(rangeinitializer) init_range_cmd,
1003 		(runner) run_cmd,
1004 		(void *) eap);
1005     }
1006     vim_free(script);
1007 }
1008 
1009 #define BUFFER_SIZE 2048
1010 
1011 /*
1012  * ":py3file"
1013  */
1014     void
1015 ex_py3file(exarg_T *eap)
1016 {
1017     static char buffer[BUFFER_SIZE];
1018     const char *file;
1019     char *p;
1020     int i;
1021 
1022     if (p_pyx == 0)
1023 	p_pyx = 3;
1024 
1025     /* Have to do it like this. PyRun_SimpleFile requires you to pass a
1026      * stdio file pointer, but Vim and the Python DLL are compiled with
1027      * different options under Windows, meaning that stdio pointers aren't
1028      * compatible between the two. Yuk.
1029      *
1030      * construct: exec(compile(open('a_filename', 'rb').read(), 'a_filename', 'exec'))
1031      *
1032      * Using bytes so that Python can detect the source encoding as it normally
1033      * does. The doc does not say "compile" accept bytes, though.
1034      *
1035      * We need to escape any backslashes or single quotes in the file name, so that
1036      * Python won't mangle the file name.
1037      */
1038 
1039     strcpy(buffer, "exec(compile(open('");
1040     p = buffer + 19; /* size of "exec(compile(open('" */
1041 
1042     for (i=0; i<2; ++i)
1043     {
1044 	file = (char *)eap->arg;
1045 	while (*file && p < buffer + (BUFFER_SIZE - 3))
1046 	{
1047 	    if (*file == '\\' || *file == '\'')
1048 		*p++ = '\\';
1049 	    *p++ = *file++;
1050 	}
1051 	/* If we didn't finish the file name, we hit a buffer overflow */
1052 	if (*file != '\0')
1053 	    return;
1054 	if (i==0)
1055 	{
1056 	    strcpy(p,"','rb').read(),'");
1057 	    p += 16;
1058 	}
1059 	else
1060 	{
1061 	    strcpy(p,"','exec'))");
1062 	    p += 10;
1063 	}
1064     }
1065 
1066 
1067     /* Execute the file */
1068     DoPyCommand(buffer,
1069 	    (rangeinitializer) init_range_cmd,
1070 	    (runner) run_cmd,
1071 	    (void *) eap);
1072 }
1073 
1074     void
1075 ex_py3do(exarg_T *eap)
1076 {
1077     if (p_pyx == 0)
1078 	p_pyx = 3;
1079 
1080     DoPyCommand((char *)eap->arg,
1081 	    (rangeinitializer)init_range_cmd,
1082 	    (runner)run_do,
1083 	    (void *)eap);
1084 }
1085 
1086 /******************************************************
1087  * 2. Python output stream: writes output via [e]msg().
1088  */
1089 
1090 /* Implementation functions
1091  */
1092 
1093     static PyObject *
1094 OutputGetattro(PyObject *self, PyObject *nameobj)
1095 {
1096     GET_ATTR_STRING(name, nameobj);
1097 
1098     if (strcmp(name, "softspace") == 0)
1099 	return PyLong_FromLong(((OutputObject *)(self))->softspace);
1100     else if (strcmp(name, "errors") == 0)
1101 	return PyString_FromString("strict");
1102     else if (strcmp(name, "encoding") == 0)
1103 	return PyString_FromString(ENC_OPT);
1104 
1105     return PyObject_GenericGetAttr(self, nameobj);
1106 }
1107 
1108     static int
1109 OutputSetattro(PyObject *self, PyObject *nameobj, PyObject *val)
1110 {
1111     GET_ATTR_STRING(name, nameobj);
1112 
1113     return OutputSetattr((OutputObject *)(self), name, val);
1114 }
1115 
1116 /******************************************************
1117  * 3. Implementation of the Vim module for Python
1118  */
1119 
1120 /* Window type - Implementation functions
1121  * --------------------------------------
1122  */
1123 
1124 #define WindowType_Check(obj) ((obj)->ob_base.ob_type == &WindowType)
1125 
1126 /* Buffer type - Implementation functions
1127  * --------------------------------------
1128  */
1129 
1130 #define BufferType_Check(obj) ((obj)->ob_base.ob_type == &BufferType)
1131 
1132 static PyObject* BufferSubscript(PyObject *self, PyObject *idx);
1133 static Py_ssize_t BufferAsSubscript(PyObject *self, PyObject *idx, PyObject *val);
1134 
1135 /* Line range type - Implementation functions
1136  * --------------------------------------
1137  */
1138 
1139 #define RangeType_Check(obj) ((obj)->ob_base.ob_type == &RangeType)
1140 
1141 static PyObject* RangeSubscript(PyObject *self, PyObject *idx);
1142 static Py_ssize_t RangeAsItem(PyObject *, Py_ssize_t, PyObject *);
1143 static Py_ssize_t RangeAsSubscript(PyObject *self, PyObject *idx, PyObject *val);
1144 
1145 /* Current objects type - Implementation functions
1146  * -----------------------------------------------
1147  */
1148 
1149 static PySequenceMethods BufferAsSeq = {
1150     (lenfunc)		BufferLength,	    /* sq_length,    len(x)   */
1151     (binaryfunc)	0,		    /* sq_concat,    x+y      */
1152     (ssizeargfunc)	0,		    /* sq_repeat,    x*n      */
1153     (ssizeargfunc)	BufferItem,	    /* sq_item,      x[i]     */
1154     0,					    /* was_sq_slice,	 x[i:j]   */
1155     0,					    /* sq_ass_item,  x[i]=v   */
1156     0,					    /* sq_ass_slice, x[i:j]=v */
1157     0,					    /* sq_contains */
1158     0,					    /* sq_inplace_concat */
1159     0,					    /* sq_inplace_repeat */
1160 };
1161 
1162 static PyMappingMethods BufferAsMapping = {
1163     /* mp_length	*/ (lenfunc)BufferLength,
1164     /* mp_subscript     */ (binaryfunc)BufferSubscript,
1165     /* mp_ass_subscript */ (objobjargproc)BufferAsSubscript,
1166 };
1167 
1168 
1169 /* Buffer object
1170  */
1171 
1172     static PyObject *
1173 BufferGetattro(PyObject *self, PyObject *nameobj)
1174 {
1175     PyObject *r;
1176 
1177     GET_ATTR_STRING(name, nameobj);
1178 
1179     if ((r = BufferAttrValid((BufferObject *)(self), name)))
1180 	return r;
1181 
1182     if (CheckBuffer((BufferObject *)(self)))
1183 	return NULL;
1184 
1185     r = BufferAttr((BufferObject *)(self), name);
1186     if (r || PyErr_Occurred())
1187 	return r;
1188     else
1189 	return PyObject_GenericGetAttr(self, nameobj);
1190 }
1191 
1192     static int
1193 BufferSetattro(PyObject *self, PyObject *nameobj, PyObject *val)
1194 {
1195     GET_ATTR_STRING(name, nameobj);
1196 
1197     return BufferSetattr((BufferObject *)(self), name, val);
1198 }
1199 
1200 /******************/
1201 
1202     static PyObject *
1203 BufferSubscript(PyObject *self, PyObject* idx)
1204 {
1205     if (PyLong_Check(idx))
1206     {
1207 	long _idx = PyLong_AsLong(idx);
1208 	return BufferItem((BufferObject *)(self), _idx);
1209     } else if (PySlice_Check(idx))
1210     {
1211 	Py_ssize_t start, stop, step, slicelen;
1212 
1213 	if (CheckBuffer((BufferObject *) self))
1214 	    return NULL;
1215 
1216 	if (PySlice_GetIndicesEx((PySliceObject_T *)idx,
1217 	      (Py_ssize_t)((BufferObject *)(self))->buf->b_ml.ml_line_count,
1218 	      &start, &stop,
1219 	      &step, &slicelen) < 0)
1220 	{
1221 	    return NULL;
1222 	}
1223 	return BufferSlice((BufferObject *)(self), start, stop);
1224     }
1225     else
1226     {
1227 	RAISE_INVALID_INDEX_TYPE(idx);
1228 	return NULL;
1229     }
1230 }
1231 
1232     static Py_ssize_t
1233 BufferAsSubscript(PyObject *self, PyObject* idx, PyObject* val)
1234 {
1235     if (PyLong_Check(idx))
1236     {
1237 	long n = PyLong_AsLong(idx);
1238 	return RBAsItem((BufferObject *)(self), n, val, 1,
1239 		    (Py_ssize_t)((BufferObject *)(self))->buf->b_ml.ml_line_count,
1240 		    NULL);
1241     } else if (PySlice_Check(idx))
1242     {
1243 	Py_ssize_t start, stop, step, slicelen;
1244 
1245 	if (CheckBuffer((BufferObject *) self))
1246 	    return -1;
1247 
1248 	if (PySlice_GetIndicesEx((PySliceObject_T *)idx,
1249 	      (Py_ssize_t)((BufferObject *)(self))->buf->b_ml.ml_line_count,
1250 	      &start, &stop,
1251 	      &step, &slicelen) < 0)
1252 	{
1253 	    return -1;
1254 	}
1255 	return RBAsSlice((BufferObject *)(self), start, stop, val, 1,
1256 			  (PyInt)((BufferObject *)(self))->buf->b_ml.ml_line_count,
1257 			  NULL);
1258     }
1259     else
1260     {
1261 	RAISE_INVALID_INDEX_TYPE(idx);
1262 	return -1;
1263     }
1264 }
1265 
1266 static PySequenceMethods RangeAsSeq = {
1267     (lenfunc)		RangeLength,	 /* sq_length,	  len(x)   */
1268     (binaryfunc)	0,		 /* RangeConcat, sq_concat,  x+y   */
1269     (ssizeargfunc)	0,		 /* RangeRepeat, sq_repeat,  x*n   */
1270     (ssizeargfunc)	RangeItem,	 /* sq_item,	  x[i]	   */
1271     0,					 /* was_sq_slice,     x[i:j]   */
1272     (ssizeobjargproc)	RangeAsItem,	 /* sq_as_item,  x[i]=v   */
1273     0,					 /* sq_ass_slice, x[i:j]=v */
1274     0,					 /* sq_contains */
1275     0,					 /* sq_inplace_concat */
1276     0,					 /* sq_inplace_repeat */
1277 };
1278 
1279 static PyMappingMethods RangeAsMapping = {
1280     /* mp_length	*/ (lenfunc)RangeLength,
1281     /* mp_subscript     */ (binaryfunc)RangeSubscript,
1282     /* mp_ass_subscript */ (objobjargproc)RangeAsSubscript,
1283 };
1284 
1285 /* Line range object - Implementation
1286  */
1287 
1288     static PyObject *
1289 RangeGetattro(PyObject *self, PyObject *nameobj)
1290 {
1291     GET_ATTR_STRING(name, nameobj);
1292 
1293     if (strcmp(name, "start") == 0)
1294 	return Py_BuildValue("n", ((RangeObject *)(self))->start - 1);
1295     else if (strcmp(name, "end") == 0)
1296 	return Py_BuildValue("n", ((RangeObject *)(self))->end - 1);
1297     else
1298 	return PyObject_GenericGetAttr(self, nameobj);
1299 }
1300 
1301 /****************/
1302 
1303     static Py_ssize_t
1304 RangeAsItem(PyObject *self, Py_ssize_t n, PyObject *val)
1305 {
1306     return RBAsItem(((RangeObject *)(self))->buf, n, val,
1307 		    ((RangeObject *)(self))->start,
1308 		    ((RangeObject *)(self))->end,
1309 		    &((RangeObject *)(self))->end);
1310 }
1311 
1312     static Py_ssize_t
1313 RangeAsSlice(PyObject *self, Py_ssize_t lo, Py_ssize_t hi, PyObject *val)
1314 {
1315     return RBAsSlice(((RangeObject *)(self))->buf, lo, hi, val,
1316 		    ((RangeObject *)(self))->start,
1317 		    ((RangeObject *)(self))->end,
1318 		    &((RangeObject *)(self))->end);
1319 }
1320 
1321     static PyObject *
1322 RangeSubscript(PyObject *self, PyObject* idx)
1323 {
1324     if (PyLong_Check(idx))
1325     {
1326 	long _idx = PyLong_AsLong(idx);
1327 	return RangeItem((RangeObject *)(self), _idx);
1328     } else if (PySlice_Check(idx))
1329     {
1330 	Py_ssize_t start, stop, step, slicelen;
1331 
1332 	if (PySlice_GetIndicesEx((PySliceObject_T *)idx,
1333 		((RangeObject *)(self))->end-((RangeObject *)(self))->start+1,
1334 		&start, &stop,
1335 		&step, &slicelen) < 0)
1336 	{
1337 	    return NULL;
1338 	}
1339 	return RangeSlice((RangeObject *)(self), start, stop);
1340     }
1341     else
1342     {
1343 	RAISE_INVALID_INDEX_TYPE(idx);
1344 	return NULL;
1345     }
1346 }
1347 
1348     static Py_ssize_t
1349 RangeAsSubscript(PyObject *self, PyObject *idx, PyObject *val)
1350 {
1351     if (PyLong_Check(idx))
1352     {
1353 	long n = PyLong_AsLong(idx);
1354 	return RangeAsItem(self, n, val);
1355     } else if (PySlice_Check(idx))
1356     {
1357 	Py_ssize_t start, stop, step, slicelen;
1358 
1359 	if (PySlice_GetIndicesEx((PySliceObject_T *)idx,
1360 		((RangeObject *)(self))->end-((RangeObject *)(self))->start+1,
1361 		&start, &stop,
1362 		&step, &slicelen) < 0)
1363 	{
1364 	    return -1;
1365 	}
1366 	return RangeAsSlice(self, start, stop, val);
1367     }
1368     else
1369     {
1370 	RAISE_INVALID_INDEX_TYPE(idx);
1371 	return -1;
1372     }
1373 }
1374 
1375 /* TabPage object - Implementation
1376  */
1377 
1378     static PyObject *
1379 TabPageGetattro(PyObject *self, PyObject *nameobj)
1380 {
1381     PyObject *r;
1382 
1383     GET_ATTR_STRING(name, nameobj);
1384 
1385     if ((r = TabPageAttrValid((TabPageObject *)(self), name)))
1386 	return r;
1387 
1388     if (CheckTabPage((TabPageObject *)(self)))
1389 	return NULL;
1390 
1391     r = TabPageAttr((TabPageObject *)(self), name);
1392     if (r || PyErr_Occurred())
1393 	return r;
1394     else
1395 	return PyObject_GenericGetAttr(self, nameobj);
1396 }
1397 
1398 /* Window object - Implementation
1399  */
1400 
1401     static PyObject *
1402 WindowGetattro(PyObject *self, PyObject *nameobj)
1403 {
1404     PyObject *r;
1405 
1406     GET_ATTR_STRING(name, nameobj);
1407 
1408     if ((r = WindowAttrValid((WindowObject *)(self), name)))
1409 	return r;
1410 
1411     if (CheckWindow((WindowObject *)(self)))
1412 	return NULL;
1413 
1414     r = WindowAttr((WindowObject *)(self), name);
1415     if (r || PyErr_Occurred())
1416 	return r;
1417     else
1418 	return PyObject_GenericGetAttr(self, nameobj);
1419 }
1420 
1421     static int
1422 WindowSetattro(PyObject *self, PyObject *nameobj, PyObject *val)
1423 {
1424     GET_ATTR_STRING(name, nameobj);
1425 
1426     return WindowSetattr((WindowObject *)(self), name, val);
1427 }
1428 
1429 /* Tab page list object - Definitions
1430  */
1431 
1432 static PySequenceMethods TabListAsSeq = {
1433     (lenfunc)	     TabListLength,	    /* sq_length,    len(x)   */
1434     (binaryfunc)     0,			    /* sq_concat,    x+y      */
1435     (ssizeargfunc)   0,			    /* sq_repeat,    x*n      */
1436     (ssizeargfunc)   TabListItem,	    /* sq_item,      x[i]     */
1437     0,					    /* sq_slice,     x[i:j]   */
1438     (ssizeobjargproc)0,			    /* sq_as_item,  x[i]=v   */
1439     0,					    /* sq_ass_slice, x[i:j]=v */
1440     0,					    /* sq_contains */
1441     0,					    /* sq_inplace_concat */
1442     0,					    /* sq_inplace_repeat */
1443 };
1444 
1445 /* Window list object - Definitions
1446  */
1447 
1448 static PySequenceMethods WinListAsSeq = {
1449     (lenfunc)	     WinListLength,	    /* sq_length,    len(x)   */
1450     (binaryfunc)     0,			    /* sq_concat,    x+y      */
1451     (ssizeargfunc)   0,			    /* sq_repeat,    x*n      */
1452     (ssizeargfunc)   WinListItem,	    /* sq_item,      x[i]     */
1453     0,					    /* sq_slice,     x[i:j]   */
1454     (ssizeobjargproc)0,			    /* sq_as_item,  x[i]=v   */
1455     0,					    /* sq_ass_slice, x[i:j]=v */
1456     0,					    /* sq_contains */
1457     0,					    /* sq_inplace_concat */
1458     0,					    /* sq_inplace_repeat */
1459 };
1460 
1461 /* Current items object - Implementation
1462  */
1463     static PyObject *
1464 CurrentGetattro(PyObject *self, PyObject *nameobj)
1465 {
1466     PyObject	*r;
1467     GET_ATTR_STRING(name, nameobj);
1468     if (!(r = CurrentGetattr(self, name)))
1469 	return PyObject_GenericGetAttr(self, nameobj);
1470     return r;
1471 }
1472 
1473     static int
1474 CurrentSetattro(PyObject *self, PyObject *nameobj, PyObject *value)
1475 {
1476     GET_ATTR_STRING(name, nameobj);
1477     return CurrentSetattr(self, name, value);
1478 }
1479 
1480 /* Dictionary object - Definitions
1481  */
1482 
1483     static PyObject *
1484 DictionaryGetattro(PyObject *self, PyObject *nameobj)
1485 {
1486     DictionaryObject	*this = ((DictionaryObject *) (self));
1487 
1488     GET_ATTR_STRING(name, nameobj);
1489 
1490     if (strcmp(name, "locked") == 0)
1491 	return PyLong_FromLong(this->dict->dv_lock);
1492     else if (strcmp(name, "scope") == 0)
1493 	return PyLong_FromLong(this->dict->dv_scope);
1494 
1495     return PyObject_GenericGetAttr(self, nameobj);
1496 }
1497 
1498     static int
1499 DictionarySetattro(PyObject *self, PyObject *nameobj, PyObject *val)
1500 {
1501     GET_ATTR_STRING(name, nameobj);
1502     return DictionarySetattr((DictionaryObject *)(self), name, val);
1503 }
1504 
1505 /* List object - Definitions
1506  */
1507 
1508     static PyObject *
1509 ListGetattro(PyObject *self, PyObject *nameobj)
1510 {
1511     GET_ATTR_STRING(name, nameobj);
1512 
1513     if (strcmp(name, "locked") == 0)
1514 	return PyLong_FromLong(((ListObject *) (self))->list->lv_lock);
1515 
1516     return PyObject_GenericGetAttr(self, nameobj);
1517 }
1518 
1519     static int
1520 ListSetattro(PyObject *self, PyObject *nameobj, PyObject *val)
1521 {
1522     GET_ATTR_STRING(name, nameobj);
1523     return ListSetattr((ListObject *)(self), name, val);
1524 }
1525 
1526 /* Function object - Definitions
1527  */
1528 
1529     static PyObject *
1530 FunctionGetattro(PyObject *self, PyObject *nameobj)
1531 {
1532     PyObject		*r;
1533     FunctionObject	*this = (FunctionObject *)(self);
1534 
1535     GET_ATTR_STRING(name, nameobj);
1536 
1537     r = FunctionAttr(this, name);
1538     if (r || PyErr_Occurred())
1539 	return r;
1540     else
1541 	return PyObject_GenericGetAttr(self, nameobj);
1542 }
1543 
1544 /* External interface
1545  */
1546 
1547     void
1548 python3_buffer_free(buf_T *buf)
1549 {
1550     if (BUF_PYTHON_REF(buf) != NULL)
1551     {
1552 	BufferObject *bp = BUF_PYTHON_REF(buf);
1553 	bp->buf = INVALID_BUFFER_VALUE;
1554 	BUF_PYTHON_REF(buf) = NULL;
1555     }
1556 }
1557 
1558     void
1559 python3_window_free(win_T *win)
1560 {
1561     if (WIN_PYTHON_REF(win) != NULL)
1562     {
1563 	WindowObject *wp = WIN_PYTHON_REF(win);
1564 	wp->win = INVALID_WINDOW_VALUE;
1565 	WIN_PYTHON_REF(win) = NULL;
1566     }
1567 }
1568 
1569     void
1570 python3_tabpage_free(tabpage_T *tab)
1571 {
1572     if (TAB_PYTHON_REF(tab) != NULL)
1573     {
1574 	TabPageObject *tp = TAB_PYTHON_REF(tab);
1575 	tp->tab = INVALID_TABPAGE_VALUE;
1576 	TAB_PYTHON_REF(tab) = NULL;
1577     }
1578 }
1579 
1580     static PyObject *
1581 Py3Init_vim(void)
1582 {
1583     /* The special value is removed from sys.path in Python3_Init(). */
1584     static wchar_t *(argv[2]) = {L"/must>not&exist/foo", NULL};
1585 
1586     if (init_types())
1587 	return NULL;
1588 
1589     /* Set sys.argv[] to avoid a crash in warn(). */
1590     PySys_SetArgv(1, argv);
1591 
1592     if ((vim_module = PyModule_Create(&vimmodule)) == NULL)
1593 	return NULL;
1594 
1595     if (populate_module(vim_module))
1596 	return NULL;
1597 
1598     if (init_sys_path())
1599 	return NULL;
1600 
1601     return vim_module;
1602 }
1603 
1604 /*************************************************************************
1605  * 4. Utility functions for handling the interface between Vim and Python.
1606  */
1607 
1608 /* Convert a Vim line into a Python string.
1609  * All internal newlines are replaced by null characters.
1610  *
1611  * On errors, the Python exception data is set, and NULL is returned.
1612  */
1613     static PyObject *
1614 LineToString(const char *str)
1615 {
1616     PyObject *result;
1617     Py_ssize_t len = strlen(str);
1618     char *tmp,*p;
1619 
1620     tmp = (char *)alloc((unsigned)(len+1));
1621     p = tmp;
1622     if (p == NULL)
1623     {
1624 	PyErr_NoMemory();
1625 	return NULL;
1626     }
1627 
1628     while (*str)
1629     {
1630 	if (*str == '\n')
1631 	    *p = '\0';
1632 	else
1633 	    *p = *str;
1634 
1635 	++p;
1636 	++str;
1637     }
1638     *p = '\0';
1639 
1640     result = PyUnicode_Decode(tmp, len, (char *)ENC_OPT, CODEC_ERROR_HANDLER);
1641 
1642     vim_free(tmp);
1643     return result;
1644 }
1645 
1646     void
1647 do_py3eval (char_u *str, typval_T *rettv)
1648 {
1649     DoPyCommand((char *) str,
1650 	    (rangeinitializer) init_range_eval,
1651 	    (runner) run_eval,
1652 	    (void *) rettv);
1653     switch(rettv->v_type)
1654     {
1655 	case VAR_DICT: ++rettv->vval.v_dict->dv_refcount; break;
1656 	case VAR_LIST: ++rettv->vval.v_list->lv_refcount; break;
1657 	case VAR_FUNC: func_ref(rettv->vval.v_string);    break;
1658 	case VAR_PARTIAL: ++rettv->vval.v_partial->pt_refcount; break;
1659 	case VAR_UNKNOWN:
1660 	    rettv->v_type = VAR_NUMBER;
1661 	    rettv->vval.v_number = 0;
1662 	    break;
1663 	case VAR_NUMBER:
1664 	case VAR_STRING:
1665 	case VAR_FLOAT:
1666 	case VAR_SPECIAL:
1667 	case VAR_JOB:
1668 	case VAR_CHANNEL:
1669 	    break;
1670     }
1671 }
1672 
1673     int
1674 set_ref_in_python3 (int copyID)
1675 {
1676     return set_ref_in_py(copyID);
1677 }
1678