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Vim 7.2b ready for testing.
[MacVim.git] / src / if_python.c
blob66e792becc60cd61b8cdfc0df072f7c08d99c1bf
1 /* vi:set ts=8 sts=4 sw=4:
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 #include "vim.h"
21
22 #include <limits.h>
23
24 /* Python.h defines _POSIX_THREADS itself (if needed) */
25 #ifdef _POSIX_THREADS
26 # undef _POSIX_THREADS
27 #endif
28
29 #if defined(_WIN32) && defined (HAVE_FCNTL_H)
30 # undef HAVE_FCNTL_H
31 #endif
32
33 #ifdef _DEBUG
34 # undef _DEBUG
35 #endif
36
37 #ifdef HAVE_STDARG_H
38 # undef HAVE_STDARG_H /* Python's config.h defines it as well. */
39 #endif
40
41 #define PY_SSIZE_T_CLEAN
42
43 #include <Python.h>
44 #if defined(MACOS) && !defined(MACOS_X_UNIX)
45 # include "macglue.h"
46 # include <CodeFragments.h>
47 #endif
48 #undef main /* Defined in python.h - aargh */
49 #undef HAVE_FCNTL_H /* Clash with os_win32.h */
50
51 #if !defined(FEAT_PYTHON) && defined(PROTO)
52 /* Use this to be able to generate prototypes without python being used. */
53 # define PyObject Py_ssize_t
54 # define PyThreadState Py_ssize_t
55 # define PyTypeObject Py_ssize_t
56 struct PyMethodDef { Py_ssize_t a; };
57 # define PySequenceMethods Py_ssize_t
58 #endif
59
60 #if defined(PY_VERSION_HEX) && PY_VERSION_HEX >= 0x02050000
61 # define PyInt Py_ssize_t
62 # define PyInquiry lenfunc
63 # define PyIntArgFunc ssizeargfunc
64 # define PyIntIntArgFunc ssizessizeargfunc
65 # define PyIntObjArgProc ssizeobjargproc
66 # define PyIntIntObjArgProc ssizessizeobjargproc
67 # define Py_ssize_t_fmt "n"
68 #else
69 # define PyInt int
70 # define PyInquiry inquiry
71 # define PyIntArgFunc intargfunc
72 # define PyIntIntArgFunc intintargfunc
73 # define PyIntObjArgProc intobjargproc
74 # define PyIntIntObjArgProc intintobjargproc
75 # define Py_ssize_t_fmt "i"
76 #endif
77
78 /* Parser flags */
79 #define single_input 256
80 #define file_input 257
81 #define eval_input 258
82
83 #if defined(PY_VERSION_HEX) && PY_VERSION_HEX >= 0x020300F0
84 /* Python 2.3: can invoke ":python" recursively. */
85 # define PY_CAN_RECURSE
86 #endif
87
88 #if defined(DYNAMIC_PYTHON) || defined(PROTO)
89 # ifndef DYNAMIC_PYTHON
90 # define HINSTANCE long_u /* for generating prototypes */
91 # endif
92
93 /* This makes if_python.c compile without warnings against Python 2.5
94 * on Win32 and Win64. */
95 #undef PyRun_SimpleString
96 #undef PyArg_Parse
97 #undef PyArg_ParseTuple
98 #undef Py_BuildValue
99 #undef Py_InitModule4
100 #undef Py_InitModule4_64
101
102 /*
103 * Wrapper defines
104 */
105 # define PyArg_Parse dll_PyArg_Parse
106 # define PyArg_ParseTuple dll_PyArg_ParseTuple
107 # define PyDict_SetItemString dll_PyDict_SetItemString
108 # define PyErr_BadArgument dll_PyErr_BadArgument
109 # define PyErr_Clear dll_PyErr_Clear
110 # define PyErr_NoMemory dll_PyErr_NoMemory
111 # define PyErr_Occurred dll_PyErr_Occurred
112 # define PyErr_SetNone dll_PyErr_SetNone
113 # define PyErr_SetString dll_PyErr_SetString
114 # define PyEval_InitThreads dll_PyEval_InitThreads
115 # define PyEval_RestoreThread dll_PyEval_RestoreThread
116 # define PyEval_SaveThread dll_PyEval_SaveThread
117 # ifdef PY_CAN_RECURSE
118 # define PyGILState_Ensure dll_PyGILState_Ensure
119 # define PyGILState_Release dll_PyGILState_Release
120 # endif
121 # define PyInt_AsLong dll_PyInt_AsLong
122 # define PyInt_FromLong dll_PyInt_FromLong
123 # define PyInt_Type (*dll_PyInt_Type)
124 # define PyList_GetItem dll_PyList_GetItem
125 # define PyList_Append dll_PyList_Append
126 # define PyList_New dll_PyList_New
127 # define PyList_SetItem dll_PyList_SetItem
128 # define PyList_Size dll_PyList_Size
129 # define PyList_Type (*dll_PyList_Type)
130 # define PyImport_ImportModule dll_PyImport_ImportModule
131 # define PyDict_New dll_PyDict_New
132 # define PyDict_GetItemString dll_PyDict_GetItemString
133 # define PyModule_GetDict dll_PyModule_GetDict
134 # define PyRun_SimpleString dll_PyRun_SimpleString
135 # define PyString_AsString dll_PyString_AsString
136 # define PyString_FromString dll_PyString_FromString
137 # define PyString_FromStringAndSize dll_PyString_FromStringAndSize
138 # define PyString_Size dll_PyString_Size
139 # define PyString_Type (*dll_PyString_Type)
140 # define PySys_SetObject dll_PySys_SetObject
141 # define PySys_SetArgv dll_PySys_SetArgv
142 # define PyType_Type (*dll_PyType_Type)
143 # define Py_BuildValue dll_Py_BuildValue
144 # define Py_FindMethod dll_Py_FindMethod
145 # define Py_InitModule4 dll_Py_InitModule4
146 # define Py_Initialize dll_Py_Initialize
147 # define Py_Finalize dll_Py_Finalize
148 # define Py_IsInitialized dll_Py_IsInitialized
149 # define _PyObject_New dll__PyObject_New
150 # define _Py_NoneStruct (*dll__Py_NoneStruct)
151 # define PyObject_Init dll__PyObject_Init
152 # if defined(PY_VERSION_HEX) && PY_VERSION_HEX >= 0x02020000
153 # define PyType_IsSubtype dll_PyType_IsSubtype
154 # endif
155 # if defined(PY_VERSION_HEX) && PY_VERSION_HEX >= 0x02030000
156 # define PyObject_Malloc dll_PyObject_Malloc
157 # define PyObject_Free dll_PyObject_Free
158 # endif
159
160 /*
161 * Pointers for dynamic link
162 */
163 static int(*dll_PyArg_Parse)(PyObject *, char *, ...);
164 static int(*dll_PyArg_ParseTuple)(PyObject *, char *, ...);
165 static int(*dll_PyDict_SetItemString)(PyObject *dp, char *key, PyObject *item);
166 static int(*dll_PyErr_BadArgument)(void);
167 static void(*dll_PyErr_Clear)(void);
168 static PyObject*(*dll_PyErr_NoMemory)(void);
169 static PyObject*(*dll_PyErr_Occurred)(void);
170 static void(*dll_PyErr_SetNone)(PyObject *);
171 static void(*dll_PyErr_SetString)(PyObject *, const char *);
172 static void(*dll_PyEval_InitThreads)(void);
173 static void(*dll_PyEval_RestoreThread)(PyThreadState *);
174 static PyThreadState*(*dll_PyEval_SaveThread)(void);
175 # ifdef PY_CAN_RECURSE
176 static PyGILState_STATE (*dll_PyGILState_Ensure)(void);
177 static void (*dll_PyGILState_Release)(PyGILState_STATE);
178 #endif
179 static long(*dll_PyInt_AsLong)(PyObject *);
180 static PyObject*(*dll_PyInt_FromLong)(long);
181 static PyTypeObject* dll_PyInt_Type;
182 static PyObject*(*dll_PyList_GetItem)(PyObject *, PyInt);
183 static PyObject*(*dll_PyList_Append)(PyObject *, PyObject *);
184 static PyObject*(*dll_PyList_New)(PyInt size);
185 static int(*dll_PyList_SetItem)(PyObject *, PyInt, PyObject *);
186 static PyInt(*dll_PyList_Size)(PyObject *);
187 static PyTypeObject* dll_PyList_Type;
188 static PyObject*(*dll_PyImport_ImportModule)(const char *);
189 static PyObject*(*dll_PyDict_New)(void);
190 static PyObject*(*dll_PyDict_GetItemString)(PyObject *, const char *);
191 static PyObject*(*dll_PyModule_GetDict)(PyObject *);
192 static int(*dll_PyRun_SimpleString)(char *);
193 static char*(*dll_PyString_AsString)(PyObject *);
194 static PyObject*(*dll_PyString_FromString)(const char *);
195 static PyObject*(*dll_PyString_FromStringAndSize)(const char *, PyInt);
196 static PyInt(*dll_PyString_Size)(PyObject *);
197 static PyTypeObject* dll_PyString_Type;
198 static int(*dll_PySys_SetObject)(char *, PyObject *);
199 static int(*dll_PySys_SetArgv)(int, char **);
200 static PyTypeObject* dll_PyType_Type;
201 static PyObject*(*dll_Py_BuildValue)(char *, ...);
202 static PyObject*(*dll_Py_FindMethod)(struct PyMethodDef[], PyObject *, char *);
203 static PyObject*(*dll_Py_InitModule4)(char *, struct PyMethodDef *, char *, PyObject *, int);
204 static void(*dll_Py_Initialize)(void);
205 static void(*dll_Py_Finalize)(void);
206 static int(*dll_Py_IsInitialized)(void);
207 static PyObject*(*dll__PyObject_New)(PyTypeObject *, PyObject *);
208 static PyObject*(*dll__PyObject_Init)(PyObject *, PyTypeObject *);
209 static PyObject* dll__Py_NoneStruct;
210 # if defined(PY_VERSION_HEX) && PY_VERSION_HEX >= 0x02020000
211 static int (*dll_PyType_IsSubtype)(PyTypeObject *, PyTypeObject *);
212 # endif
213 # if defined(PY_VERSION_HEX) && PY_VERSION_HEX >= 0x02030000
214 static void* (*dll_PyObject_Malloc)(size_t);
215 static void (*dll_PyObject_Free)(void*);
216 # endif
217
218 static HINSTANCE hinstPython = 0; /* Instance of python.dll */
219
220 /* Imported exception objects */
221 static PyObject *imp_PyExc_AttributeError;
222 static PyObject *imp_PyExc_IndexError;
223 static PyObject *imp_PyExc_KeyboardInterrupt;
224 static PyObject *imp_PyExc_TypeError;
225 static PyObject *imp_PyExc_ValueError;
226
227 # define PyExc_AttributeError imp_PyExc_AttributeError
228 # define PyExc_IndexError imp_PyExc_IndexError
229 # define PyExc_KeyboardInterrupt imp_PyExc_KeyboardInterrupt
230 # define PyExc_TypeError imp_PyExc_TypeError
231 # define PyExc_ValueError imp_PyExc_ValueError
232
233 /*
234 * Table of name to function pointer of python.
235 */
236 # define PYTHON_PROC FARPROC
237 static struct
238 {
239 char *name;
240 PYTHON_PROC *ptr;
241 } python_funcname_table[] =
242 {
243 {"PyArg_Parse", (PYTHON_PROC*)&dll_PyArg_Parse},
244 {"PyArg_ParseTuple", (PYTHON_PROC*)&dll_PyArg_ParseTuple},
245 {"PyDict_SetItemString", (PYTHON_PROC*)&dll_PyDict_SetItemString},
246 {"PyErr_BadArgument", (PYTHON_PROC*)&dll_PyErr_BadArgument},
247 {"PyErr_Clear", (PYTHON_PROC*)&dll_PyErr_Clear},
248 {"PyErr_NoMemory", (PYTHON_PROC*)&dll_PyErr_NoMemory},
249 {"PyErr_Occurred", (PYTHON_PROC*)&dll_PyErr_Occurred},
250 {"PyErr_SetNone", (PYTHON_PROC*)&dll_PyErr_SetNone},
251 {"PyErr_SetString", (PYTHON_PROC*)&dll_PyErr_SetString},
252 {"PyEval_InitThreads", (PYTHON_PROC*)&dll_PyEval_InitThreads},
253 {"PyEval_RestoreThread", (PYTHON_PROC*)&dll_PyEval_RestoreThread},
254 {"PyEval_SaveThread", (PYTHON_PROC*)&dll_PyEval_SaveThread},
255 # ifdef PY_CAN_RECURSE
256 {"PyGILState_Ensure", (PYTHON_PROC*)&dll_PyGILState_Ensure},
257 {"PyGILState_Release", (PYTHON_PROC*)&dll_PyGILState_Release},
258 # endif
259 {"PyInt_AsLong", (PYTHON_PROC*)&dll_PyInt_AsLong},
260 {"PyInt_FromLong", (PYTHON_PROC*)&dll_PyInt_FromLong},
261 {"PyInt_Type", (PYTHON_PROC*)&dll_PyInt_Type},
262 {"PyList_GetItem", (PYTHON_PROC*)&dll_PyList_GetItem},
263 {"PyList_Append", (PYTHON_PROC*)&dll_PyList_Append},
264 {"PyList_New", (PYTHON_PROC*)&dll_PyList_New},
265 {"PyList_SetItem", (PYTHON_PROC*)&dll_PyList_SetItem},
266 {"PyList_Size", (PYTHON_PROC*)&dll_PyList_Size},
267 {"PyList_Type", (PYTHON_PROC*)&dll_PyList_Type},
268 {"PyImport_ImportModule", (PYTHON_PROC*)&dll_PyImport_ImportModule},
269 {"PyDict_GetItemString", (PYTHON_PROC*)&dll_PyDict_GetItemString},
270 {"PyDict_New", (PYTHON_PROC*)&dll_PyDict_New},
271 {"PyModule_GetDict", (PYTHON_PROC*)&dll_PyModule_GetDict},
272 {"PyRun_SimpleString", (PYTHON_PROC*)&dll_PyRun_SimpleString},
273 {"PyString_AsString", (PYTHON_PROC*)&dll_PyString_AsString},
274 {"PyString_FromString", (PYTHON_PROC*)&dll_PyString_FromString},
275 {"PyString_FromStringAndSize", (PYTHON_PROC*)&dll_PyString_FromStringAndSize},
276 {"PyString_Size", (PYTHON_PROC*)&dll_PyString_Size},
277 {"PyString_Type", (PYTHON_PROC*)&dll_PyString_Type},
278 {"PySys_SetObject", (PYTHON_PROC*)&dll_PySys_SetObject},
279 {"PySys_SetArgv", (PYTHON_PROC*)&dll_PySys_SetArgv},
280 {"PyType_Type", (PYTHON_PROC*)&dll_PyType_Type},
281 {"Py_BuildValue", (PYTHON_PROC*)&dll_Py_BuildValue},
282 {"Py_FindMethod", (PYTHON_PROC*)&dll_Py_FindMethod},
283 # if (PY_VERSION_HEX >= 0x02050000) && SIZEOF_SIZE_T != SIZEOF_INT
284 {"Py_InitModule4_64", (PYTHON_PROC*)&dll_Py_InitModule4},
285 # else
286 {"Py_InitModule4", (PYTHON_PROC*)&dll_Py_InitModule4},
287 # endif
288 {"Py_Initialize", (PYTHON_PROC*)&dll_Py_Initialize},
289 {"Py_Finalize", (PYTHON_PROC*)&dll_Py_Finalize},
290 {"Py_IsInitialized", (PYTHON_PROC*)&dll_Py_IsInitialized},
291 {"_PyObject_New", (PYTHON_PROC*)&dll__PyObject_New},
292 {"PyObject_Init", (PYTHON_PROC*)&dll__PyObject_Init},
293 {"_Py_NoneStruct", (PYTHON_PROC*)&dll__Py_NoneStruct},
294 # if defined(PY_VERSION_HEX) && PY_VERSION_HEX >= 0x02020000
295 {"PyType_IsSubtype", (PYTHON_PROC*)&dll_PyType_IsSubtype},
296 # endif
297 # if defined(PY_VERSION_HEX) && PY_VERSION_HEX >= 0x02030000
298 {"PyObject_Malloc", (PYTHON_PROC*)&dll_PyObject_Malloc},
299 {"PyObject_Free", (PYTHON_PROC*)&dll_PyObject_Free},
300 # endif
301 {"", NULL},
302 };
303
304 /*
305 * Free python.dll
306 */
307 static void
308 end_dynamic_python(void)
309 {
310 if (hinstPython)
311 {
312 FreeLibrary(hinstPython);
313 hinstPython = 0;
314 }
315 }
316
317 /*
318 * Load library and get all pointers.
319 * Parameter 'libname' provides name of DLL.
320 * Return OK or FAIL.
321 */
322 static int
323 python_runtime_link_init(char *libname, int verbose)
324 {
325 int i;
326
327 if (hinstPython)
328 return OK;
329 hinstPython = LoadLibrary(libname);
330 if (!hinstPython)
331 {
332 if (verbose)
333 EMSG2(_(e_loadlib), libname);
334 return FAIL;
335 }
336
337 for (i = 0; python_funcname_table[i].ptr; ++i)
338 {
339 if ((*python_funcname_table[i].ptr = GetProcAddress(hinstPython,
340 python_funcname_table[i].name)) == NULL)
341 {
342 FreeLibrary(hinstPython);
343 hinstPython = 0;
344 if (verbose)
345 EMSG2(_(e_loadfunc), python_funcname_table[i].name);
346 return FAIL;
347 }
348 }
349 return OK;
350 }
351
352 /*
353 * If python is enabled (there is installed python on Windows system) return
354 * TRUE, else FALSE.
355 */
356 int
357 python_enabled(int verbose)
358 {
359 return python_runtime_link_init(DYNAMIC_PYTHON_DLL, verbose) == OK;
360 }
361
362 /* Load the standard Python exceptions - don't import the symbols from the
363 * DLL, as this can cause errors (importing data symbols is not reliable).
364 */
365 static void get_exceptions __ARGS((void));
366
367 static void
368 get_exceptions()
369 {
370 PyObject *exmod = PyImport_ImportModule("exceptions");
371 PyObject *exdict = PyModule_GetDict(exmod);
372 imp_PyExc_AttributeError = PyDict_GetItemString(exdict, "AttributeError");
373 imp_PyExc_IndexError = PyDict_GetItemString(exdict, "IndexError");
374 imp_PyExc_KeyboardInterrupt = PyDict_GetItemString(exdict, "KeyboardInterrupt");
375 imp_PyExc_TypeError = PyDict_GetItemString(exdict, "TypeError");
376 imp_PyExc_ValueError = PyDict_GetItemString(exdict, "ValueError");
377 Py_XINCREF(imp_PyExc_AttributeError);
378 Py_XINCREF(imp_PyExc_IndexError);
379 Py_XINCREF(imp_PyExc_KeyboardInterrupt);
380 Py_XINCREF(imp_PyExc_TypeError);
381 Py_XINCREF(imp_PyExc_ValueError);
382 Py_XDECREF(exmod);
383 }
384 #endif /* DYNAMIC_PYTHON */
385
386 /******************************************************
387 * Internal function prototypes.
388 */
389
390 static void DoPythonCommand(exarg_T *, const char *);
391 static PyInt RangeStart;
392 static PyInt RangeEnd;
393
394 static void PythonIO_Flush(void);
395 static int PythonIO_Init(void);
396 static int PythonMod_Init(void);
397
398 /* Utility functions for the vim/python interface
399 * ----------------------------------------------
400 */
401 static PyObject *GetBufferLine(buf_T *, PyInt);
402 static PyObject *GetBufferLineList(buf_T *, PyInt, PyInt);
403
404 static int SetBufferLine(buf_T *, PyInt, PyObject *, PyInt *);
405 static int SetBufferLineList(buf_T *, PyInt, PyInt, PyObject *, PyInt *);
406 static int InsertBufferLines(buf_T *, PyInt, PyObject *, PyInt *);
407
408 static PyObject *LineToString(const char *);
409 static char *StringToLine(PyObject *);
410
411 static int VimErrorCheck(void);
412
413 #define PyErr_SetVim(str) PyErr_SetString(VimError, str)
414
415 /******************************************************
416 * 1. Python interpreter main program.
417 */
418
419 static int initialised = 0;
420
421 #if PYTHON_API_VERSION < 1007 /* Python 1.4 */
422 typedef PyObject PyThreadState;
423 #endif
424
425 #ifdef PY_CAN_RECURSE
426 static PyGILState_STATE pygilstate = PyGILState_UNLOCKED;
427 #else
428 static PyThreadState *saved_python_thread = NULL;
429 #endif
430
431 /*
432 * Suspend a thread of the Python interpreter, other threads are allowed to
433 * run.
434 */
435 static void
436 Python_SaveThread(void)
437 {
438 #ifdef PY_CAN_RECURSE
439 PyGILState_Release(pygilstate);
440 #else
441 saved_python_thread = PyEval_SaveThread();
442 #endif
443 }
444
445 /*
446 * Restore a thread of the Python interpreter, waits for other threads to
447 * block.
448 */
449 static void
450 Python_RestoreThread(void)
451 {
452 #ifdef PY_CAN_RECURSE
453 pygilstate = PyGILState_Ensure();
454 #else
455 PyEval_RestoreThread(saved_python_thread);
456 saved_python_thread = NULL;
457 #endif
458 }
459
460 /*
461 * obtain a lock on the Vim data structures
462 */
463 static void Python_Lock_Vim(void)
464 {
465 }
466
467 /*
468 * release a lock on the Vim data structures
469 */
470 static void Python_Release_Vim(void)
471 {
472 }
473
474 void
475 python_end()
476 {
477 static int recurse = 0;
478
479 /* If a crash occurs while doing this, don't try again. */
480 if (recurse != 0)
481 return;
482
483 ++recurse;
484
485 #ifdef DYNAMIC_PYTHON
486 if (hinstPython && Py_IsInitialized())
487 {
488 Python_RestoreThread(); /* enter python */
489 Py_Finalize();
490 }
491 end_dynamic_python();
492 #else
493 if (Py_IsInitialized())
494 {
495 Python_RestoreThread(); /* enter python */
496 Py_Finalize();
497 }
498 #endif
499
500 --recurse;
501 }
502
503 static int
504 Python_Init(void)
505 {
506 if (!initialised)
507 {
508 #ifdef DYNAMIC_PYTHON
509 if (!python_enabled(TRUE))
510 {
511 EMSG(_("E263: Sorry, this command is disabled, the Python library could not be loaded."));
512 goto fail;
513 }
514 #endif
515
516 #if !defined(MACOS) || defined(MACOS_X_UNIX)
517 Py_Initialize();
518 #else
519 PyMac_Initialize();
520 #endif
521 /* initialise threads */
522 PyEval_InitThreads();
523
524 #ifdef DYNAMIC_PYTHON
525 get_exceptions();
526 #endif
527
528 if (PythonIO_Init())
529 goto fail;
530
531 if (PythonMod_Init())
532 goto fail;
533
534 /* the first python thread is vim's, release the lock */
535 Python_SaveThread();
536
537 initialised = 1;
538 }
539
540 return 0;
541
542 fail:
543 /* We call PythonIO_Flush() here to print any Python errors.
544 * This is OK, as it is possible to call this function even
545 * if PythonIO_Init() has not completed successfully (it will
546 * not do anything in this case).
547 */
548 PythonIO_Flush();
549 return -1;
550 }
551
552 /*
553 * External interface
554 */
555 static void
556 DoPythonCommand(exarg_T *eap, const char *cmd)
557 {
558 #ifndef PY_CAN_RECURSE
559 static int recursive = 0;
560 #endif
561 #if defined(MACOS) && !defined(MACOS_X_UNIX)
562 GrafPtr oldPort;
563 #endif
564 #if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
565 char *saved_locale;
566 #endif
567
568 #ifndef PY_CAN_RECURSE
569 if (recursive)
570 {
571 EMSG(_("E659: Cannot invoke Python recursively"));
572 return;
573 }
574 ++recursive;
575 #endif
576
577 #if defined(MACOS) && !defined(MACOS_X_UNIX)
578 GetPort(&oldPort);
579 /* Check if the Python library is available */
580 if ((Ptr)PyMac_Initialize == (Ptr)kUnresolvedCFragSymbolAddress)
581 goto theend;
582 #endif
583 if (Python_Init())
584 goto theend;
585
586 RangeStart = eap->line1;
587 RangeEnd = eap->line2;
588 Python_Release_Vim(); /* leave vim */
589
590 #if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
591 /* Python only works properly when the LC_NUMERIC locale is "C". */
592 saved_locale = setlocale(LC_NUMERIC, NULL);
593 if (saved_locale == NULL || STRCMP(saved_locale, "C") == 0)
594 saved_locale = NULL;
595 else
596 {
597 /* Need to make a copy, value may change when setting new locale. */
598 saved_locale = (char *)vim_strsave((char_u *)saved_locale);
599 (void)setlocale(LC_NUMERIC, "C");
600 }
601 #endif
602
603 Python_RestoreThread(); /* enter python */
604
605 PyRun_SimpleString((char *)(cmd));
606
607 Python_SaveThread(); /* leave python */
608
609 #if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
610 if (saved_locale != NULL)
611 {
612 (void)setlocale(LC_NUMERIC, saved_locale);
613 vim_free(saved_locale);
614 }
615 #endif
616
617 Python_Lock_Vim(); /* enter vim */
618 PythonIO_Flush();
619 #if defined(MACOS) && !defined(MACOS_X_UNIX)
620 SetPort(oldPort);
621 #endif
622
623 theend:
624 #ifndef PY_CAN_RECURSE
625 --recursive;
626 #endif
627 return; /* keeps lint happy */
628 }
629
630 /*
631 * ":python"
632 */
633 void
634 ex_python(exarg_T *eap)
635 {
636 char_u *script;
637
638 script = script_get(eap, eap->arg);
639 if (!eap->skip)
640 {
641 if (script == NULL)
642 DoPythonCommand(eap, (char *)eap->arg);
643 else
644 DoPythonCommand(eap, (char *)script);
645 }
646 vim_free(script);
647 }
648
649 #define BUFFER_SIZE 1024
650
651 /*
652 * ":pyfile"
653 */
654 void
655 ex_pyfile(exarg_T *eap)
656 {
657 static char buffer[BUFFER_SIZE];
658 const char *file = (char *)eap->arg;
659 char *p;
660
661 /* Have to do it like this. PyRun_SimpleFile requires you to pass a
662 * stdio file pointer, but Vim and the Python DLL are compiled with
663 * different options under Windows, meaning that stdio pointers aren't
664 * compatible between the two. Yuk.
665 *
666 * Put the string "execfile('file')" into buffer. But, we need to
667 * escape any backslashes or single quotes in the file name, so that
668 * Python won't mangle the file name.
669 */
670 strcpy(buffer, "execfile('");
671 p = buffer + 10; /* size of "execfile('" */
672
673 while (*file && p < buffer + (BUFFER_SIZE - 3))
674 {
675 if (*file == '\\' || *file == '\'')
676 *p++ = '\\';
677 *p++ = *file++;
678 }
679
680 /* If we didn't finish the file name, we hit a buffer overflow */
681 if (*file != '\0')
682 return;
683
684 /* Put in the terminating "')" and a null */
685 *p++ = '\'';
686 *p++ = ')';
687 *p++ = '\0';
688
689 /* Execute the file */
690 DoPythonCommand(eap, buffer);
691 }
692
693 /******************************************************
694 * 2. Python output stream: writes output via [e]msg().
695 */
696
697 /* Implementation functions
698 */
699
700 static PyObject *OutputGetattr(PyObject *, char *);
701 static int OutputSetattr(PyObject *, char *, PyObject *);
702
703 static PyObject *OutputWrite(PyObject *, PyObject *);
704 static PyObject *OutputWritelines(PyObject *, PyObject *);
705
706 typedef void (*writefn)(char_u *);
707 static void writer(writefn fn, char_u *str, PyInt n);
708
709 /* Output object definition
710 */
711
712 typedef struct
713 {
714 PyObject_HEAD
715 long softspace;
716 long error;
717 } OutputObject;
718
719 static struct PyMethodDef OutputMethods[] = {
720 /* name, function, calling, documentation */
721 {"write", OutputWrite, 1, "" },
722 {"writelines", OutputWritelines, 1, "" },
723 { NULL, NULL, 0, NULL }
724 };
725
726 static PyTypeObject OutputType = {
727 PyObject_HEAD_INIT(0)
728 0,
729 "message",
730 sizeof(OutputObject),
731 0,
732
733 (destructor) 0,
734 (printfunc) 0,
735 (getattrfunc) OutputGetattr,
736 (setattrfunc) OutputSetattr,
737 (cmpfunc) 0,
738 (reprfunc) 0,
739
740 0, /* as number */
741 0, /* as sequence */
742 0, /* as mapping */
743
744 (hashfunc) 0,
745 (ternaryfunc) 0,
746 (reprfunc) 0
747 };
748
749 /*************/
750
751 static PyObject *
752 OutputGetattr(PyObject *self, char *name)
753 {
754 if (strcmp(name, "softspace") == 0)
755 return PyInt_FromLong(((OutputObject *)(self))->softspace);
756
757 return Py_FindMethod(OutputMethods, self, name);
758 }
759
760 static int
761 OutputSetattr(PyObject *self, char *name, PyObject *val)
762 {
763 if (val == NULL) {
764 PyErr_SetString(PyExc_AttributeError, _("can't delete OutputObject attributes"));
765 return -1;
766 }
767
768 if (strcmp(name, "softspace") == 0)
769 {
770 if (!PyInt_Check(val)) {
771 PyErr_SetString(PyExc_TypeError, _("softspace must be an integer"));
772 return -1;
773 }
774
775 ((OutputObject *)(self))->softspace = PyInt_AsLong(val);
776 return 0;
777 }
778
779 PyErr_SetString(PyExc_AttributeError, _("invalid attribute"));
780 return -1;
781 }
782
783 /*************/
784
785 static PyObject *
786 OutputWrite(PyObject *self, PyObject *args)
787 {
788 int len;
789 char *str;
790 int error = ((OutputObject *)(self))->error;
791
792 if (!PyArg_ParseTuple(args, "s#", &str, &len))
793 return NULL;
794
795 Py_BEGIN_ALLOW_THREADS
796 Python_Lock_Vim();
797 writer((writefn)(error ? emsg : msg), (char_u *)str, len);
798 Python_Release_Vim();
799 Py_END_ALLOW_THREADS
800
801 Py_INCREF(Py_None);
802 return Py_None;
803 }
804
805 static PyObject *
806 OutputWritelines(PyObject *self, PyObject *args)
807 {
808 PyInt n;
809 PyInt i;
810 PyObject *list;
811 int error = ((OutputObject *)(self))->error;
812
813 if (!PyArg_ParseTuple(args, "O", &list))
814 return NULL;
815 Py_INCREF(list);
816
817 if (!PyList_Check(list)) {
818 PyErr_SetString(PyExc_TypeError, _("writelines() requires list of strings"));
819 Py_DECREF(list);
820 return NULL;
821 }
822
823 n = PyList_Size(list);
824
825 for (i = 0; i < n; ++i)
826 {
827 PyObject *line = PyList_GetItem(list, i);
828 char *str;
829 PyInt len;
830
831 if (!PyArg_Parse(line, "s#", &str, &len)) {
832 PyErr_SetString(PyExc_TypeError, _("writelines() requires list of strings"));
833 Py_DECREF(list);
834 return NULL;
835 }
836
837 Py_BEGIN_ALLOW_THREADS
838 Python_Lock_Vim();
839 writer((writefn)(error ? emsg : msg), (char_u *)str, len);
840 Python_Release_Vim();
841 Py_END_ALLOW_THREADS
842 }
843
844 Py_DECREF(list);
845 Py_INCREF(Py_None);
846 return Py_None;
847 }
848
849 /* Output buffer management
850 */
851
852 static char_u *buffer = NULL;
853 static PyInt buffer_len = 0;
854 static PyInt buffer_size = 0;
855
856 static writefn old_fn = NULL;
857
858 static void
859 buffer_ensure(PyInt n)
860 {
861 PyInt new_size;
862 char_u *new_buffer;
863
864 if (n < buffer_size)
865 return;
866
867 new_size = buffer_size;
868 while (new_size < n)
869 new_size += 80;
870
871 if (new_size != buffer_size)
872 {
873 new_buffer = alloc((unsigned)new_size);
874 if (new_buffer == NULL)
875 return;
876
877 if (buffer)
878 {
879 memcpy(new_buffer, buffer, buffer_len);
880 vim_free(buffer);
881 }
882
883 buffer = new_buffer;
884 buffer_size = new_size;
885 }
886 }
887
888 static void
889 PythonIO_Flush(void)
890 {
891 if (old_fn && buffer_len)
892 {
893 buffer[buffer_len] = 0;
894 old_fn(buffer);
895 }
896
897 buffer_len = 0;
898 }
899
900 static void
901 writer(writefn fn, char_u *str, PyInt n)
902 {
903 char_u *ptr;
904
905 if (fn != old_fn && old_fn != NULL)
906 PythonIO_Flush();
907
908 old_fn = fn;
909
910 while (n > 0 && (ptr = memchr(str, '\n', n)) != NULL)
911 {
912 PyInt len = ptr - str;
913
914 buffer_ensure(buffer_len + len + 1);
915
916 memcpy(buffer + buffer_len, str, len);
917 buffer_len += len;
918 buffer[buffer_len] = 0;
919 fn(buffer);
920 str = ptr + 1;
921 n -= len + 1;
922 buffer_len = 0;
923 }
924
925 /* Put the remaining text into the buffer for later printing */
926 buffer_ensure(buffer_len + n + 1);
927 memcpy(buffer + buffer_len, str, n);
928 buffer_len += n;
929 }
930
931 /***************/
932
933 static OutputObject Output =
934 {
935 PyObject_HEAD_INIT(&OutputType)
936 0,
937 0
938 };
939
940 static OutputObject Error =
941 {
942 PyObject_HEAD_INIT(&OutputType)
943 0,
944 1
945 };
946
947 static int
948 PythonIO_Init(void)
949 {
950 /* Fixups... */
951 OutputType.ob_type = &PyType_Type;
952
953 PySys_SetObject("stdout", (PyObject *)(void *)&Output);
954 PySys_SetObject("stderr", (PyObject *)(void *)&Error);
955
956 if (PyErr_Occurred())
957 {
958 EMSG(_("E264: Python: Error initialising I/O objects"));
959 return -1;
960 }
961
962 return 0;
963 }
964
965 /******************************************************
966 * 3. Implementation of the Vim module for Python
967 */
968
969 /* Vim module - Implementation functions
970 * -------------------------------------
971 */
972
973 static PyObject *VimError;
974
975 static PyObject *VimCommand(PyObject *, PyObject *);
976 static PyObject *VimEval(PyObject *, PyObject *);
977
978 /* Window type - Implementation functions
979 * --------------------------------------
980 */
981
982 typedef struct
983 {
984 PyObject_HEAD
985 win_T *win;
986 }
987 WindowObject;
988
989 #define INVALID_WINDOW_VALUE ((win_T *)(-1))
990
991 #define WindowType_Check(obj) ((obj)->ob_type == &WindowType)
992
993 static PyObject *WindowNew(win_T *);
994
995 static void WindowDestructor(PyObject *);
996 static PyObject *WindowGetattr(PyObject *, char *);
997 static int WindowSetattr(PyObject *, char *, PyObject *);
998 static PyObject *WindowRepr(PyObject *);
999
1000 /* Buffer type - Implementation functions
1001 * --------------------------------------
1002 */
1003
1004 typedef struct
1005 {
1006 PyObject_HEAD
1007 buf_T *buf;
1008 }
1009 BufferObject;
1010
1011 #define INVALID_BUFFER_VALUE ((buf_T *)(-1))
1012
1013 #define BufferType_Check(obj) ((obj)->ob_type == &BufferType)
1014
1015 static PyObject *BufferNew (buf_T *);
1016
1017 static void BufferDestructor(PyObject *);
1018 static PyObject *BufferGetattr(PyObject *, char *);
1019 static PyObject *BufferRepr(PyObject *);
1020
1021 static PyInt BufferLength(PyObject *);
1022 static PyObject *BufferItem(PyObject *, PyInt);
1023 static PyObject *BufferSlice(PyObject *, PyInt, PyInt);
1024 static PyInt BufferAssItem(PyObject *, PyInt, PyObject *);
1025 static PyInt BufferAssSlice(PyObject *, PyInt, PyInt, PyObject *);
1026
1027 static PyObject *BufferAppend(PyObject *, PyObject *);
1028 static PyObject *BufferMark(PyObject *, PyObject *);
1029 static PyObject *BufferRange(PyObject *, PyObject *);
1030
1031 /* Line range type - Implementation functions
1032 * --------------------------------------
1033 */
1034
1035 typedef struct
1036 {
1037 PyObject_HEAD
1038 BufferObject *buf;
1039 PyInt start;
1040 PyInt end;
1041 }
1042 RangeObject;
1043
1044 #define RangeType_Check(obj) ((obj)->ob_type == &RangeType)
1045
1046 static PyObject *RangeNew(buf_T *, PyInt, PyInt);
1047
1048 static void RangeDestructor(PyObject *);
1049 static PyObject *RangeGetattr(PyObject *, char *);
1050 static PyObject *RangeRepr(PyObject *);
1051
1052 static PyInt RangeLength(PyObject *);
1053 static PyObject *RangeItem(PyObject *, PyInt);
1054 static PyObject *RangeSlice(PyObject *, PyInt, PyInt);
1055 static PyInt RangeAssItem(PyObject *, PyInt, PyObject *);
1056 static PyInt RangeAssSlice(PyObject *, PyInt, PyInt, PyObject *);
1057
1058 static PyObject *RangeAppend(PyObject *, PyObject *);
1059
1060 /* Window list type - Implementation functions
1061 * -------------------------------------------
1062 */
1063
1064 static PyInt WinListLength(PyObject *);
1065 static PyObject *WinListItem(PyObject *, PyInt);
1066
1067 /* Buffer list type - Implementation functions
1068 * -------------------------------------------
1069 */
1070
1071 static PyInt BufListLength(PyObject *);
1072 static PyObject *BufListItem(PyObject *, PyInt);
1073
1074 /* Current objects type - Implementation functions
1075 * -----------------------------------------------
1076 */
1077
1078 static PyObject *CurrentGetattr(PyObject *, char *);
1079 static int CurrentSetattr(PyObject *, char *, PyObject *);
1080
1081 /* Vim module - Definitions
1082 */
1083
1084 static struct PyMethodDef VimMethods[] = {
1085 /* name, function, calling, documentation */
1086 {"command", VimCommand, 1, "Execute a Vim ex-mode command" },
1087 {"eval", VimEval, 1, "Evaluate an expression using Vim evaluator" },
1088 { NULL, NULL, 0, NULL }
1089 };
1090
1091 /* Vim module - Implementation
1092 */
1093 /*ARGSUSED*/
1094 static PyObject *
1095 VimCommand(PyObject *self, PyObject *args)
1096 {
1097 char *cmd;
1098 PyObject *result;
1099
1100 if (!PyArg_ParseTuple(args, "s", &cmd))
1101 return NULL;
1102
1103 PyErr_Clear();
1104
1105 Py_BEGIN_ALLOW_THREADS
1106 Python_Lock_Vim();
1107
1108 do_cmdline_cmd((char_u *)cmd);
1109 update_screen(VALID);
1110
1111 Python_Release_Vim();
1112 Py_END_ALLOW_THREADS
1113
1114 if (VimErrorCheck())
1115 result = NULL;
1116 else
1117 result = Py_None;
1118
1119 Py_XINCREF(result);
1120 return result;
1121 }
1122
1123 /*
1124 * Function to translate a typval_T into a PyObject; this will recursively
1125 * translate lists/dictionaries into their Python equivalents.
1126 *
1127 * The depth parameter is to avoid infinite recursion, set it to 1 when
1128 * you call VimToPython.
1129 */
1130 static PyObject *
1131 VimToPython(typval_T *our_tv, int depth, PyObject *lookupDict)
1132 {
1133 PyObject *result;
1134 PyObject *newObj;
1135 char ptrBuf[NUMBUFLEN];
1136
1137 /* Avoid infinite recursion */
1138 if (depth > 100)
1139 {
1140 Py_INCREF(Py_None);
1141 result = Py_None;
1142 return result;
1143 }
1144
1145 /* Check if we run into a recursive loop. The item must be in lookupDict
1146 * then and we can use it again. */
1147 sprintf(ptrBuf, PRINTF_DECIMAL_LONG_U, (long_u)our_tv);
1148 result = PyDict_GetItemString(lookupDict, ptrBuf);
1149 if (result != NULL)
1150 Py_INCREF(result);
1151 else if (our_tv->v_type == VAR_STRING)
1152 {
1153 result = Py_BuildValue("s", our_tv->vval.v_string);
1154 PyDict_SetItemString(lookupDict, ptrBuf, result);
1155 }
1156 else if (our_tv->v_type == VAR_NUMBER)
1157 {
1158 char buf[NUMBUFLEN];
1159
1160 /* For backwards compatibility numbers are stored as strings. */
1161 sprintf(buf, "%ld", (long)our_tv->vval.v_number);
1162 result = Py_BuildValue("s", buf);
1163 PyDict_SetItemString(lookupDict, ptrBuf, result);
1164 }
1165 #ifdef FEAT_FLOAT
1166 else if (our_tv->v_type == VAR_FLOAT)
1167 {
1168 char buf[NUMBUFLEN];
1169
1170 sprintf(buf, "%f", our_tv->vval.v_float);
1171 result = Py_BuildValue("s", buf);
1172 PyDict_SetItemString(lookupDict, ptrBuf, result);
1173 }
1174 #endif
1175 else if (our_tv->v_type == VAR_LIST)
1176 {
1177 list_T *list = our_tv->vval.v_list;
1178 listitem_T *curr;
1179
1180 result = PyList_New(0);
1181 PyDict_SetItemString(lookupDict, ptrBuf, result);
1182
1183 if (list != NULL)
1184 {
1185 for (curr = list->lv_first; curr != NULL; curr = curr->li_next)
1186 {
1187 newObj = VimToPython(&curr->li_tv, depth + 1, lookupDict);
1188 PyList_Append(result, newObj);
1189 Py_DECREF(newObj);
1190 }
1191 }
1192 }
1193 else if (our_tv->v_type == VAR_DICT)
1194 {
1195 result = PyDict_New();
1196 PyDict_SetItemString(lookupDict, ptrBuf, result);
1197
1198 if (our_tv->vval.v_dict != NULL)
1199 {
1200 hashtab_T *ht = &our_tv->vval.v_dict->dv_hashtab;
1201 long_u todo = ht->ht_used;
1202 hashitem_T *hi;
1203 dictitem_T *di;
1204
1205 for (hi = ht->ht_array; todo > 0; ++hi)
1206 {
1207 if (!HASHITEM_EMPTY(hi))
1208 {
1209 --todo;
1210
1211 di = dict_lookup(hi);
1212 newObj = VimToPython(&di->di_tv, depth + 1, lookupDict);
1213 PyDict_SetItemString(result, (char *)hi->hi_key, newObj);
1214 Py_DECREF(newObj);
1215 }
1216 }
1217 }
1218 }
1219 else
1220 {
1221 Py_INCREF(Py_None);
1222 result = Py_None;
1223 }
1224
1225 return result;
1226 }
1227
1228 /*ARGSUSED*/
1229 static PyObject *
1230 VimEval(PyObject *self, PyObject *args)
1231 {
1232 #ifdef FEAT_EVAL
1233 char *expr;
1234 typval_T *our_tv;
1235 PyObject *result;
1236 PyObject *lookup_dict;
1237
1238 if (!PyArg_ParseTuple(args, "s", &expr))
1239 return NULL;
1240
1241 Py_BEGIN_ALLOW_THREADS
1242 Python_Lock_Vim();
1243 our_tv = eval_expr((char_u *)expr, NULL);
1244
1245 Python_Release_Vim();
1246 Py_END_ALLOW_THREADS
1247
1248 if (our_tv == NULL)
1249 {
1250 PyErr_SetVim(_("invalid expression"));
1251 return NULL;
1252 }
1253
1254 /* Convert the Vim type into a Python type. Create a dictionary that's
1255 * used to check for recursive loops. */
1256 lookup_dict = PyDict_New();
1257 result = VimToPython(our_tv, 1, lookup_dict);
1258 Py_DECREF(lookup_dict);
1259
1260
1261 Py_BEGIN_ALLOW_THREADS
1262 Python_Lock_Vim();
1263 free_tv(our_tv);
1264 Python_Release_Vim();
1265 Py_END_ALLOW_THREADS
1266
1267 return result;
1268 #else
1269 PyErr_SetVim(_("expressions disabled at compile time"));
1270 return NULL;
1271 #endif
1272 }
1273
1274 /* Common routines for buffers and line ranges
1275 * -------------------------------------------
1276 */
1277 static int
1278 CheckBuffer(BufferObject *this)
1279 {
1280 if (this->buf == INVALID_BUFFER_VALUE)
1281 {
1282 PyErr_SetVim(_("attempt to refer to deleted buffer"));
1283 return -1;
1284 }
1285
1286 return 0;
1287 }
1288
1289 static PyObject *
1290 RBItem(BufferObject *self, PyInt n, PyInt start, PyInt end)
1291 {
1292 if (CheckBuffer(self))
1293 return NULL;
1294
1295 if (n < 0 || n > end - start)
1296 {
1297 PyErr_SetString(PyExc_IndexError, _("line number out of range"));
1298 return NULL;
1299 }
1300
1301 return GetBufferLine(self->buf, n+start);
1302 }
1303
1304 static PyObject *
1305 RBSlice(BufferObject *self, PyInt lo, PyInt hi, PyInt start, PyInt end)
1306 {
1307 PyInt size;
1308
1309 if (CheckBuffer(self))
1310 return NULL;
1311
1312 size = end - start + 1;
1313
1314 if (lo < 0)
1315 lo = 0;
1316 else if (lo > size)
1317 lo = size;
1318 if (hi < 0)
1319 hi = 0;
1320 if (hi < lo)
1321 hi = lo;
1322 else if (hi > size)
1323 hi = size;
1324
1325 return GetBufferLineList(self->buf, lo+start, hi+start);
1326 }
1327
1328 static PyInt
1329 RBAssItem(BufferObject *self, PyInt n, PyObject *val, PyInt start, PyInt end, PyInt *new_end)
1330 {
1331 PyInt len_change;
1332
1333 if (CheckBuffer(self))
1334 return -1;
1335
1336 if (n < 0 || n > end - start)
1337 {
1338 PyErr_SetString(PyExc_IndexError, _("line number out of range"));
1339 return -1;
1340 }
1341
1342 if (SetBufferLine(self->buf, n+start, val, &len_change) == FAIL)
1343 return -1;
1344
1345 if (new_end)
1346 *new_end = end + len_change;
1347
1348 return 0;
1349 }
1350
1351 static PyInt
1352 RBAssSlice(BufferObject *self, PyInt lo, PyInt hi, PyObject *val, PyInt start, PyInt end, PyInt *new_end)
1353 {
1354 PyInt size;
1355 PyInt len_change;
1356
1357 /* Self must be a valid buffer */
1358 if (CheckBuffer(self))
1359 return -1;
1360
1361 /* Sort out the slice range */
1362 size = end - start + 1;
1363
1364 if (lo < 0)
1365 lo = 0;
1366 else if (lo > size)
1367 lo = size;
1368 if (hi < 0)
1369 hi = 0;
1370 if (hi < lo)
1371 hi = lo;
1372 else if (hi > size)
1373 hi = size;
1374
1375 if (SetBufferLineList(self->buf, lo+start, hi+start, val, &len_change) == FAIL)
1376 return -1;
1377
1378 if (new_end)
1379 *new_end = end + len_change;
1380
1381 return 0;
1382 }
1383
1384 static PyObject *
1385 RBAppend(BufferObject *self, PyObject *args, PyInt start, PyInt end, PyInt *new_end)
1386 {
1387 PyObject *lines;
1388 PyInt len_change;
1389 PyInt max;
1390 PyInt n;
1391
1392 if (CheckBuffer(self))
1393 return NULL;
1394
1395 max = n = end - start + 1;
1396
1397 if (!PyArg_ParseTuple(args, "O|" Py_ssize_t_fmt, &lines, &n))
1398 return NULL;
1399
1400 if (n < 0 || n > max)
1401 {
1402 PyErr_SetString(PyExc_ValueError, _("line number out of range"));
1403 return NULL;
1404 }
1405
1406 if (InsertBufferLines(self->buf, n + start - 1, lines, &len_change) == FAIL)
1407 return NULL;
1408
1409 if (new_end)
1410 *new_end = end + len_change;
1411
1412 Py_INCREF(Py_None);
1413 return Py_None;
1414 }
1415
1416
1417 /* Buffer object - Definitions
1418 */
1419
1420 static struct PyMethodDef BufferMethods[] = {
1421 /* name, function, calling, documentation */
1422 {"append", BufferAppend, 1, "Append data to Vim buffer" },
1423 {"mark", BufferMark, 1, "Return (row,col) representing position of named mark" },
1424 {"range", BufferRange, 1, "Return a range object which represents the part of the given buffer between line numbers s and e" },
1425 { NULL, NULL, 0, NULL }
1426 };
1427
1428 static PySequenceMethods BufferAsSeq = {
1429 (PyInquiry) BufferLength, /* sq_length, len(x) */
1430 (binaryfunc) 0, /* BufferConcat, */ /* sq_concat, x+y */
1431 (PyIntArgFunc) 0, /* BufferRepeat, */ /* sq_repeat, x*n */
1432 (PyIntArgFunc) BufferItem, /* sq_item, x[i] */
1433 (PyIntIntArgFunc) BufferSlice, /* sq_slice, x[i:j] */
1434 (PyIntObjArgProc) BufferAssItem, /* sq_ass_item, x[i]=v */
1435 (PyIntIntObjArgProc) BufferAssSlice, /* sq_ass_slice, x[i:j]=v */
1436 };
1437
1438 static PyTypeObject BufferType = {
1439 PyObject_HEAD_INIT(0)
1440 0,
1441 "buffer",
1442 sizeof(BufferObject),
1443 0,
1444
1445 (destructor) BufferDestructor, /* tp_dealloc, refcount==0 */
1446 (printfunc) 0, /* tp_print, print x */
1447 (getattrfunc) BufferGetattr, /* tp_getattr, x.attr */
1448 (setattrfunc) 0, /* tp_setattr, x.attr=v */
1449 (cmpfunc) 0, /* tp_compare, x>y */
1450 (reprfunc) BufferRepr, /* tp_repr, `x`, print x */
1451
1452 0, /* as number */
1453 &BufferAsSeq, /* as sequence */
1454 0, /* as mapping */
1455
1456 (hashfunc) 0, /* tp_hash, dict(x) */
1457 (ternaryfunc) 0, /* tp_call, x() */
1458 (reprfunc) 0, /* tp_str, str(x) */
1459 };
1460
1461 /* Buffer object - Implementation
1462 */
1463
1464 static PyObject *
1465 BufferNew(buf_T *buf)
1466 {
1467 /* We need to handle deletion of buffers underneath us.
1468 * If we add a "b_python_ref" field to the buf_T structure,
1469 * then we can get at it in buf_freeall() in vim. We then
1470 * need to create only ONE Python object per buffer - if
1471 * we try to create a second, just INCREF the existing one
1472 * and return it. The (single) Python object referring to
1473 * the buffer is stored in "b_python_ref".
1474 * Question: what to do on a buf_freeall(). We'll probably
1475 * have to either delete the Python object (DECREF it to
1476 * zero - a bad idea, as it leaves dangling refs!) or
1477 * set the buf_T * value to an invalid value (-1?), which
1478 * means we need checks in all access functions... Bah.
1479 */
1480
1481 BufferObject *self;
1482
1483 if (buf->b_python_ref != NULL)
1484 {
1485 self = buf->b_python_ref;
1486 Py_INCREF(self);
1487 }
1488 else
1489 {
1490 self = PyObject_NEW(BufferObject, &BufferType);
1491 if (self == NULL)
1492 return NULL;
1493 self->buf = buf;
1494 buf->b_python_ref = self;
1495 }
1496
1497 return (PyObject *)(self);
1498 }
1499
1500 static void
1501 BufferDestructor(PyObject *self)
1502 {
1503 BufferObject *this = (BufferObject *)(self);
1504
1505 if (this->buf && this->buf != INVALID_BUFFER_VALUE)
1506 this->buf->b_python_ref = NULL;
1507
1508 Py_DECREF(self);
1509 }
1510
1511 static PyObject *
1512 BufferGetattr(PyObject *self, char *name)
1513 {
1514 BufferObject *this = (BufferObject *)(self);
1515
1516 if (CheckBuffer(this))
1517 return NULL;
1518
1519 if (strcmp(name, "name") == 0)
1520 return Py_BuildValue("s", this->buf->b_ffname);
1521 else if (strcmp(name, "number") == 0)
1522 return Py_BuildValue(Py_ssize_t_fmt, this->buf->b_fnum);
1523 else if (strcmp(name,"__members__") == 0)
1524 return Py_BuildValue("[ss]", "name", "number");
1525 else
1526 return Py_FindMethod(BufferMethods, self, name);
1527 }
1528
1529 static PyObject *
1530 BufferRepr(PyObject *self)
1531 {
1532 static char repr[100];
1533 BufferObject *this = (BufferObject *)(self);
1534
1535 if (this->buf == INVALID_BUFFER_VALUE)
1536 {
1537 vim_snprintf(repr, 100, _("<buffer object (deleted) at %p>"), (self));
1538 return PyString_FromString(repr);
1539 }
1540 else
1541 {
1542 char *name = (char *)this->buf->b_fname;
1543 PyInt len;
1544
1545 if (name == NULL)
1546 name = "";
1547 len = strlen(name);
1548
1549 if (len > 35)
1550 name = name + (35 - len);
1551
1552 vim_snprintf(repr, 100, "<buffer %s%s>", len > 35 ? "..." : "", name);
1553
1554 return PyString_FromString(repr);
1555 }
1556 }
1557
1558 /******************/
1559
1560 static PyInt
1561 BufferLength(PyObject *self)
1562 {
1563 /* HOW DO WE SIGNAL AN ERROR FROM THIS FUNCTION? */
1564 if (CheckBuffer((BufferObject *)(self)))
1565 return -1; /* ??? */
1566
1567 return (((BufferObject *)(self))->buf->b_ml.ml_line_count);
1568 }
1569
1570 static PyObject *
1571 BufferItem(PyObject *self, PyInt n)
1572 {
1573 return RBItem((BufferObject *)(self), n, 1,
1574 (int)((BufferObject *)(self))->buf->b_ml.ml_line_count);
1575 }
1576
1577 static PyObject *
1578 BufferSlice(PyObject *self, PyInt lo, PyInt hi)
1579 {
1580 return RBSlice((BufferObject *)(self), lo, hi, 1,
1581 (int)((BufferObject *)(self))->buf->b_ml.ml_line_count);
1582 }
1583
1584 static PyInt
1585 BufferAssItem(PyObject *self, PyInt n, PyObject *val)
1586 {
1587 return RBAssItem((BufferObject *)(self), n, val, 1,
1588 (PyInt)((BufferObject *)(self))->buf->b_ml.ml_line_count,
1589 NULL);
1590 }
1591
1592 static PyInt
1593 BufferAssSlice(PyObject *self, PyInt lo, PyInt hi, PyObject *val)
1594 {
1595 return RBAssSlice((BufferObject *)(self), lo, hi, val, 1,
1596 (PyInt)((BufferObject *)(self))->buf->b_ml.ml_line_count,
1597 NULL);
1598 }
1599
1600 static PyObject *
1601 BufferAppend(PyObject *self, PyObject *args)
1602 {
1603 return RBAppend((BufferObject *)(self), args, 1,
1604 (PyInt)((BufferObject *)(self))->buf->b_ml.ml_line_count,
1605 NULL);
1606 }
1607
1608 static PyObject *
1609 BufferMark(PyObject *self, PyObject *args)
1610 {
1611 pos_T *posp;
1612 char mark;
1613 buf_T *curbuf_save;
1614
1615 if (CheckBuffer((BufferObject *)(self)))
1616 return NULL;
1617
1618 if (!PyArg_ParseTuple(args, "c", &mark))
1619 return NULL;
1620
1621 curbuf_save = curbuf;
1622 curbuf = ((BufferObject *)(self))->buf;
1623 posp = getmark(mark, FALSE);
1624 curbuf = curbuf_save;
1625
1626 if (posp == NULL)
1627 {
1628 PyErr_SetVim(_("invalid mark name"));
1629 return NULL;
1630 }
1631
1632 /* Ckeck for keyboard interrupt */
1633 if (VimErrorCheck())
1634 return NULL;
1635
1636 if (posp->lnum <= 0)
1637 {
1638 /* Or raise an error? */
1639 Py_INCREF(Py_None);
1640 return Py_None;
1641 }
1642
1643 return Py_BuildValue("(ll)", (long)(posp->lnum), (long)(posp->col));
1644 }
1645
1646 static PyObject *
1647 BufferRange(PyObject *self, PyObject *args)
1648 {
1649 PyInt start;
1650 PyInt end;
1651
1652 if (CheckBuffer((BufferObject *)(self)))
1653 return NULL;
1654
1655 if (!PyArg_ParseTuple(args, Py_ssize_t_fmt Py_ssize_t_fmt, &start, &end))
1656 return NULL;
1657
1658 return RangeNew(((BufferObject *)(self))->buf, start, end);
1659 }
1660
1661 /* Line range object - Definitions
1662 */
1663
1664 static struct PyMethodDef RangeMethods[] = {
1665 /* name, function, calling, documentation */
1666 {"append", RangeAppend, 1, "Append data to the Vim range" },
1667 { NULL, NULL, 0, NULL }
1668 };
1669
1670 static PySequenceMethods RangeAsSeq = {
1671 (PyInquiry) RangeLength, /* sq_length, len(x) */
1672 (binaryfunc) 0, /* RangeConcat, */ /* sq_concat, x+y */
1673 (PyIntArgFunc) 0, /* RangeRepeat, */ /* sq_repeat, x*n */
1674 (PyIntArgFunc) RangeItem, /* sq_item, x[i] */
1675 (PyIntIntArgFunc) RangeSlice, /* sq_slice, x[i:j] */
1676 (PyIntObjArgProc) RangeAssItem, /* sq_ass_item, x[i]=v */
1677 (PyIntIntObjArgProc) RangeAssSlice, /* sq_ass_slice, x[i:j]=v */
1678 };
1679
1680 static PyTypeObject RangeType = {
1681 PyObject_HEAD_INIT(0)
1682 0,
1683 "range",
1684 sizeof(RangeObject),
1685 0,
1686
1687 (destructor) RangeDestructor, /* tp_dealloc, refcount==0 */
1688 (printfunc) 0, /* tp_print, print x */
1689 (getattrfunc) RangeGetattr, /* tp_getattr, x.attr */
1690 (setattrfunc) 0, /* tp_setattr, x.attr=v */
1691 (cmpfunc) 0, /* tp_compare, x>y */
1692 (reprfunc) RangeRepr, /* tp_repr, `x`, print x */
1693
1694 0, /* as number */
1695 &RangeAsSeq, /* as sequence */
1696 0, /* as mapping */
1697
1698 (hashfunc) 0, /* tp_hash, dict(x) */
1699 (ternaryfunc) 0, /* tp_call, x() */
1700 (reprfunc) 0, /* tp_str, str(x) */
1701 };
1702
1703 /* Line range object - Implementation
1704 */
1705
1706 static PyObject *
1707 RangeNew(buf_T *buf, PyInt start, PyInt end)
1708 {
1709 BufferObject *bufr;
1710 RangeObject *self;
1711 self = PyObject_NEW(RangeObject, &RangeType);
1712 if (self == NULL)
1713 return NULL;
1714
1715 bufr = (BufferObject *)BufferNew(buf);
1716 if (bufr == NULL)
1717 {
1718 Py_DECREF(self);
1719 return NULL;
1720 }
1721 Py_INCREF(bufr);
1722
1723 self->buf = bufr;
1724 self->start = start;
1725 self->end = end;
1726
1727 return (PyObject *)(self);
1728 }
1729
1730 static void
1731 RangeDestructor(PyObject *self)
1732 {
1733 Py_DECREF(((RangeObject *)(self))->buf);
1734 Py_DECREF(self);
1735 }
1736
1737 static PyObject *
1738 RangeGetattr(PyObject *self, char *name)
1739 {
1740 if (strcmp(name, "start") == 0)
1741 return Py_BuildValue(Py_ssize_t_fmt, ((RangeObject *)(self))->start - 1);
1742 else if (strcmp(name, "end") == 0)
1743 return Py_BuildValue(Py_ssize_t_fmt, ((RangeObject *)(self))->end - 1);
1744 else
1745 return Py_FindMethod(RangeMethods, self, name);
1746 }
1747
1748 static PyObject *
1749 RangeRepr(PyObject *self)
1750 {
1751 static char repr[100];
1752 RangeObject *this = (RangeObject *)(self);
1753
1754 if (this->buf->buf == INVALID_BUFFER_VALUE)
1755 {
1756 vim_snprintf(repr, 100, "<range object (for deleted buffer) at %p>",
1757 (self));
1758 return PyString_FromString(repr);
1759 }
1760 else
1761 {
1762 char *name = (char *)this->buf->buf->b_fname;
1763 int len;
1764
1765 if (name == NULL)
1766 name = "";
1767 len = (int)strlen(name);
1768
1769 if (len > 45)
1770 name = name + (45 - len);
1771
1772 vim_snprintf(repr, 100, "<range %s%s (%d:%d)>",
1773 len > 45 ? "..." : "", name,
1774 this->start, this->end);
1775
1776 return PyString_FromString(repr);
1777 }
1778 }
1779
1780 /****************/
1781
1782 static PyInt
1783 RangeLength(PyObject *self)
1784 {
1785 /* HOW DO WE SIGNAL AN ERROR FROM THIS FUNCTION? */
1786 if (CheckBuffer(((RangeObject *)(self))->buf))
1787 return -1; /* ??? */
1788
1789 return (((RangeObject *)(self))->end - ((RangeObject *)(self))->start + 1);
1790 }
1791
1792 static PyObject *
1793 RangeItem(PyObject *self, PyInt n)
1794 {
1795 return RBItem(((RangeObject *)(self))->buf, n,
1796 ((RangeObject *)(self))->start,
1797 ((RangeObject *)(self))->end);
1798 }
1799
1800 static PyObject *
1801 RangeSlice(PyObject *self, PyInt lo, PyInt hi)
1802 {
1803 return RBSlice(((RangeObject *)(self))->buf, lo, hi,
1804 ((RangeObject *)(self))->start,
1805 ((RangeObject *)(self))->end);
1806 }
1807
1808 static PyInt
1809 RangeAssItem(PyObject *self, PyInt n, PyObject *val)
1810 {
1811 return RBAssItem(((RangeObject *)(self))->buf, n, val,
1812 ((RangeObject *)(self))->start,
1813 ((RangeObject *)(self))->end,
1814 &((RangeObject *)(self))->end);
1815 }
1816
1817 static PyInt
1818 RangeAssSlice(PyObject *self, PyInt lo, PyInt hi, PyObject *val)
1819 {
1820 return RBAssSlice(((RangeObject *)(self))->buf, lo, hi, val,
1821 ((RangeObject *)(self))->start,
1822 ((RangeObject *)(self))->end,
1823 &((RangeObject *)(self))->end);
1824 }
1825
1826 static PyObject *
1827 RangeAppend(PyObject *self, PyObject *args)
1828 {
1829 return RBAppend(((RangeObject *)(self))->buf, args,
1830 ((RangeObject *)(self))->start,
1831 ((RangeObject *)(self))->end,
1832 &((RangeObject *)(self))->end);
1833 }
1834
1835 /* Buffer list object - Definitions
1836 */
1837
1838 typedef struct
1839 {
1840 PyObject_HEAD
1841 }
1842 BufListObject;
1843
1844 static PySequenceMethods BufListAsSeq = {
1845 (PyInquiry) BufListLength, /* sq_length, len(x) */
1846 (binaryfunc) 0, /* sq_concat, x+y */
1847 (PyIntArgFunc) 0, /* sq_repeat, x*n */
1848 (PyIntArgFunc) BufListItem, /* sq_item, x[i] */
1849 (PyIntIntArgFunc) 0, /* sq_slice, x[i:j] */
1850 (PyIntObjArgProc) 0, /* sq_ass_item, x[i]=v */
1851 (PyIntIntObjArgProc) 0, /* sq_ass_slice, x[i:j]=v */
1852 };
1853
1854 static PyTypeObject BufListType = {
1855 PyObject_HEAD_INIT(0)
1856 0,
1857 "buffer list",
1858 sizeof(BufListObject),
1859 0,
1860
1861 (destructor) 0, /* tp_dealloc, refcount==0 */
1862 (printfunc) 0, /* tp_print, print x */
1863 (getattrfunc) 0, /* tp_getattr, x.attr */
1864 (setattrfunc) 0, /* tp_setattr, x.attr=v */
1865 (cmpfunc) 0, /* tp_compare, x>y */
1866 (reprfunc) 0, /* tp_repr, `x`, print x */
1867
1868 0, /* as number */
1869 &BufListAsSeq, /* as sequence */
1870 0, /* as mapping */
1871
1872 (hashfunc) 0, /* tp_hash, dict(x) */
1873 (ternaryfunc) 0, /* tp_call, x() */
1874 (reprfunc) 0, /* tp_str, str(x) */
1875 };
1876
1877 /* Buffer list object - Implementation
1878 */
1879
1880 /*ARGSUSED*/
1881 static PyInt
1882 BufListLength(PyObject *self)
1883 {
1884 buf_T *b = firstbuf;
1885 PyInt n = 0;
1886
1887 while (b)
1888 {
1889 ++n;
1890 b = b->b_next;
1891 }
1892
1893 return n;
1894 }
1895
1896 /*ARGSUSED*/
1897 static PyObject *
1898 BufListItem(PyObject *self, PyInt n)
1899 {
1900 buf_T *b;
1901
1902 for (b = firstbuf; b; b = b->b_next, --n)
1903 {
1904 if (n == 0)
1905 return BufferNew(b);
1906 }
1907
1908 PyErr_SetString(PyExc_IndexError, _("no such buffer"));
1909 return NULL;
1910 }
1911
1912 /* Window object - Definitions
1913 */
1914
1915 static struct PyMethodDef WindowMethods[] = {
1916 /* name, function, calling, documentation */
1917 { NULL, NULL, 0, NULL }
1918 };
1919
1920 static PyTypeObject WindowType = {
1921 PyObject_HEAD_INIT(0)
1922 0,
1923 "window",
1924 sizeof(WindowObject),
1925 0,
1926
1927 (destructor) WindowDestructor, /* tp_dealloc, refcount==0 */
1928 (printfunc) 0, /* tp_print, print x */
1929 (getattrfunc) WindowGetattr, /* tp_getattr, x.attr */
1930 (setattrfunc) WindowSetattr, /* tp_setattr, x.attr=v */
1931 (cmpfunc) 0, /* tp_compare, x>y */
1932 (reprfunc) WindowRepr, /* tp_repr, `x`, print x */
1933
1934 0, /* as number */
1935 0, /* as sequence */
1936 0, /* as mapping */
1937
1938 (hashfunc) 0, /* tp_hash, dict(x) */
1939 (ternaryfunc) 0, /* tp_call, x() */
1940 (reprfunc) 0, /* tp_str, str(x) */
1941 };
1942
1943 /* Window object - Implementation
1944 */
1945
1946 static PyObject *
1947 WindowNew(win_T *win)
1948 {
1949 /* We need to handle deletion of windows underneath us.
1950 * If we add a "w_python_ref" field to the win_T structure,
1951 * then we can get at it in win_free() in vim. We then
1952 * need to create only ONE Python object per window - if
1953 * we try to create a second, just INCREF the existing one
1954 * and return it. The (single) Python object referring to
1955 * the window is stored in "w_python_ref".
1956 * On a win_free() we set the Python object's win_T* field
1957 * to an invalid value. We trap all uses of a window
1958 * object, and reject them if the win_T* field is invalid.
1959 */
1960
1961 WindowObject *self;
1962
1963 if (win->w_python_ref)
1964 {
1965 self = win->w_python_ref;
1966 Py_INCREF(self);
1967 }
1968 else
1969 {
1970 self = PyObject_NEW(WindowObject, &WindowType);
1971 if (self == NULL)
1972 return NULL;
1973 self->win = win;
1974 win->w_python_ref = self;
1975 }
1976
1977 return (PyObject *)(self);
1978 }
1979
1980 static void
1981 WindowDestructor(PyObject *self)
1982 {
1983 WindowObject *this = (WindowObject *)(self);
1984
1985 if (this->win && this->win != INVALID_WINDOW_VALUE)
1986 this->win->w_python_ref = NULL;
1987
1988 Py_DECREF(self);
1989 }
1990
1991 static int
1992 CheckWindow(WindowObject *this)
1993 {
1994 if (this->win == INVALID_WINDOW_VALUE)
1995 {
1996 PyErr_SetVim(_("attempt to refer to deleted window"));
1997 return -1;
1998 }
1999
2000 return 0;
2001 }
2002
2003 static PyObject *
2004 WindowGetattr(PyObject *self, char *name)
2005 {
2006 WindowObject *this = (WindowObject *)(self);
2007
2008 if (CheckWindow(this))
2009 return NULL;
2010
2011 if (strcmp(name, "buffer") == 0)
2012 return (PyObject *)BufferNew(this->win->w_buffer);
2013 else if (strcmp(name, "cursor") == 0)
2014 {
2015 pos_T *pos = &this->win->w_cursor;
2016
2017 return Py_BuildValue("(ll)", (long)(pos->lnum), (long)(pos->col));
2018 }
2019 else if (strcmp(name, "height") == 0)
2020 return Py_BuildValue("l", (long)(this->win->w_height));
2021 #ifdef FEAT_VERTSPLIT
2022 else if (strcmp(name, "width") == 0)
2023 return Py_BuildValue("l", (long)(W_WIDTH(this->win)));
2024 #endif
2025 else if (strcmp(name,"__members__") == 0)
2026 return Py_BuildValue("[sss]", "buffer", "cursor", "height");
2027 else
2028 return Py_FindMethod(WindowMethods, self, name);
2029 }
2030
2031 static int
2032 WindowSetattr(PyObject *self, char *name, PyObject *val)
2033 {
2034 WindowObject *this = (WindowObject *)(self);
2035
2036 if (CheckWindow(this))
2037 return -1;
2038
2039 if (strcmp(name, "buffer") == 0)
2040 {
2041 PyErr_SetString(PyExc_TypeError, _("readonly attribute"));
2042 return -1;
2043 }
2044 else if (strcmp(name, "cursor") == 0)
2045 {
2046 long lnum;
2047 long col;
2048
2049 if (!PyArg_Parse(val, "(ll)", &lnum, &col))
2050 return -1;
2051
2052 if (lnum <= 0 || lnum > this->win->w_buffer->b_ml.ml_line_count)
2053 {
2054 PyErr_SetVim(_("cursor position outside buffer"));
2055 return -1;
2056 }
2057
2058 /* Check for keyboard interrupts */
2059 if (VimErrorCheck())
2060 return -1;
2061
2062 /* NO CHECK ON COLUMN - SEEMS NOT TO MATTER */
2063
2064 this->win->w_cursor.lnum = lnum;
2065 this->win->w_cursor.col = col;
2066 update_screen(VALID);
2067
2068 return 0;
2069 }
2070 else if (strcmp(name, "height") == 0)
2071 {
2072 int height;
2073 win_T *savewin;
2074
2075 if (!PyArg_Parse(val, "i", &height))
2076 return -1;
2077
2078 #ifdef FEAT_GUI
2079 need_mouse_correct = TRUE;
2080 #endif
2081 savewin = curwin;
2082 curwin = this->win;
2083 win_setheight(height);
2084 curwin = savewin;
2085
2086 /* Check for keyboard interrupts */
2087 if (VimErrorCheck())
2088 return -1;
2089
2090 return 0;
2091 }
2092 #ifdef FEAT_VERTSPLIT
2093 else if (strcmp(name, "width") == 0)
2094 {
2095 int width;
2096 win_T *savewin;
2097
2098 if (!PyArg_Parse(val, "i", &width))
2099 return -1;
2100
2101 #ifdef FEAT_GUI
2102 need_mouse_correct = TRUE;
2103 #endif
2104 savewin = curwin;
2105 curwin = this->win;
2106 win_setwidth(width);
2107 curwin = savewin;
2108
2109 /* Check for keyboard interrupts */
2110 if (VimErrorCheck())
2111 return -1;
2112
2113 return 0;
2114 }
2115 #endif
2116 else
2117 {
2118 PyErr_SetString(PyExc_AttributeError, name);
2119 return -1;
2120 }
2121 }
2122
2123 static PyObject *
2124 WindowRepr(PyObject *self)
2125 {
2126 static char repr[100];
2127 WindowObject *this = (WindowObject *)(self);
2128
2129 if (this->win == INVALID_WINDOW_VALUE)
2130 {
2131 vim_snprintf(repr, 100, _("<window object (deleted) at %p>"), (self));
2132 return PyString_FromString(repr);
2133 }
2134 else
2135 {
2136 int i = 0;
2137 win_T *w;
2138
2139 for (w = firstwin; w != NULL && w != this->win; w = W_NEXT(w))
2140 ++i;
2141
2142 if (w == NULL)
2143 vim_snprintf(repr, 100, _("<window object (unknown) at %p>"),
2144 (self));
2145 else
2146 vim_snprintf(repr, 100, _("<window %d>"), i);
2147
2148 return PyString_FromString(repr);
2149 }
2150 }
2151
2152 /* Window list object - Definitions
2153 */
2154
2155 typedef struct
2156 {
2157 PyObject_HEAD
2158 }
2159 WinListObject;
2160
2161 static PySequenceMethods WinListAsSeq = {
2162 (PyInquiry) WinListLength, /* sq_length, len(x) */
2163 (binaryfunc) 0, /* sq_concat, x+y */
2164 (PyIntArgFunc) 0, /* sq_repeat, x*n */
2165 (PyIntArgFunc) WinListItem, /* sq_item, x[i] */
2166 (PyIntIntArgFunc) 0, /* sq_slice, x[i:j] */
2167 (PyIntObjArgProc) 0, /* sq_ass_item, x[i]=v */
2168 (PyIntIntObjArgProc) 0, /* sq_ass_slice, x[i:j]=v */
2169 };
2170
2171 static PyTypeObject WinListType = {
2172 PyObject_HEAD_INIT(0)
2173 0,
2174 "window list",
2175 sizeof(WinListObject),
2176 0,
2177
2178 (destructor) 0, /* tp_dealloc, refcount==0 */
2179 (printfunc) 0, /* tp_print, print x */
2180 (getattrfunc) 0, /* tp_getattr, x.attr */
2181 (setattrfunc) 0, /* tp_setattr, x.attr=v */
2182 (cmpfunc) 0, /* tp_compare, x>y */
2183 (reprfunc) 0, /* tp_repr, `x`, print x */
2184
2185 0, /* as number */
2186 &WinListAsSeq, /* as sequence */
2187 0, /* as mapping */
2188
2189 (hashfunc) 0, /* tp_hash, dict(x) */
2190 (ternaryfunc) 0, /* tp_call, x() */
2191 (reprfunc) 0, /* tp_str, str(x) */
2192 };
2193
2194 /* Window list object - Implementation
2195 */
2196 /*ARGSUSED*/
2197 static PyInt
2198 WinListLength(PyObject *self)
2199 {
2200 win_T *w = firstwin;
2201 PyInt n = 0;
2202
2203 while (w != NULL)
2204 {
2205 ++n;
2206 w = W_NEXT(w);
2207 }
2208
2209 return n;
2210 }
2211
2212 /*ARGSUSED*/
2213 static PyObject *
2214 WinListItem(PyObject *self, PyInt n)
2215 {
2216 win_T *w;
2217
2218 for (w = firstwin; w != NULL; w = W_NEXT(w), --n)
2219 if (n == 0)
2220 return WindowNew(w);
2221
2222 PyErr_SetString(PyExc_IndexError, _("no such window"));
2223 return NULL;
2224 }
2225
2226 /* Current items object - Definitions
2227 */
2228
2229 typedef struct
2230 {
2231 PyObject_HEAD
2232 }
2233 CurrentObject;
2234
2235 static PyTypeObject CurrentType = {
2236 PyObject_HEAD_INIT(0)
2237 0,
2238 "current data",
2239 sizeof(CurrentObject),
2240 0,
2241
2242 (destructor) 0, /* tp_dealloc, refcount==0 */
2243 (printfunc) 0, /* tp_print, print x */
2244 (getattrfunc) CurrentGetattr, /* tp_getattr, x.attr */
2245 (setattrfunc) CurrentSetattr, /* tp_setattr, x.attr=v */
2246 (cmpfunc) 0, /* tp_compare, x>y */
2247 (reprfunc) 0, /* tp_repr, `x`, print x */
2248
2249 0, /* as number */
2250 0, /* as sequence */
2251 0, /* as mapping */
2252
2253 (hashfunc) 0, /* tp_hash, dict(x) */
2254 (ternaryfunc) 0, /* tp_call, x() */
2255 (reprfunc) 0, /* tp_str, str(x) */
2256 };
2257
2258 /* Current items object - Implementation
2259 */
2260 /*ARGSUSED*/
2261 static PyObject *
2262 CurrentGetattr(PyObject *self, char *name)
2263 {
2264 if (strcmp(name, "buffer") == 0)
2265 return (PyObject *)BufferNew(curbuf);
2266 else if (strcmp(name, "window") == 0)
2267 return (PyObject *)WindowNew(curwin);
2268 else if (strcmp(name, "line") == 0)
2269 return GetBufferLine(curbuf, (PyInt)curwin->w_cursor.lnum);
2270 else if (strcmp(name, "range") == 0)
2271 return RangeNew(curbuf, RangeStart, RangeEnd);
2272 else if (strcmp(name,"__members__") == 0)
2273 return Py_BuildValue("[ssss]", "buffer", "window", "line", "range");
2274 else
2275 {
2276 PyErr_SetString(PyExc_AttributeError, name);
2277 return NULL;
2278 }
2279 }
2280
2281 /*ARGSUSED*/
2282 static int
2283 CurrentSetattr(PyObject *self, char *name, PyObject *value)
2284 {
2285 if (strcmp(name, "line") == 0)
2286 {
2287 if (SetBufferLine(curbuf, (PyInt)curwin->w_cursor.lnum, value, NULL) == FAIL)
2288 return -1;
2289
2290 return 0;
2291 }
2292 else
2293 {
2294 PyErr_SetString(PyExc_AttributeError, name);
2295 return -1;
2296 }
2297 }
2298
2299 /* External interface
2300 */
2301
2302 void
2303 python_buffer_free(buf_T *buf)
2304 {
2305 if (buf->b_python_ref != NULL)
2306 {
2307 BufferObject *bp = buf->b_python_ref;
2308 bp->buf = INVALID_BUFFER_VALUE;
2309 buf->b_python_ref = NULL;
2310 }
2311 }
2312
2313 #if defined(FEAT_WINDOWS) || defined(PROTO)
2314 void
2315 python_window_free(win_T *win)
2316 {
2317 if (win->w_python_ref != NULL)
2318 {
2319 WindowObject *wp = win->w_python_ref;
2320 wp->win = INVALID_WINDOW_VALUE;
2321 win->w_python_ref = NULL;
2322 }
2323 }
2324 #endif
2325
2326 static BufListObject TheBufferList =
2327 {
2328 PyObject_HEAD_INIT(&BufListType)
2329 };
2330
2331 static WinListObject TheWindowList =
2332 {
2333 PyObject_HEAD_INIT(&WinListType)
2334 };
2335
2336 static CurrentObject TheCurrent =
2337 {
2338 PyObject_HEAD_INIT(&CurrentType)
2339 };
2340
2341 static int
2342 PythonMod_Init(void)
2343 {
2344 PyObject *mod;
2345 PyObject *dict;
2346 static char *(argv[2]) = {"", NULL};
2347
2348 /* Fixups... */
2349 BufferType.ob_type = &PyType_Type;
2350 RangeType.ob_type = &PyType_Type;
2351 WindowType.ob_type = &PyType_Type;
2352 BufListType.ob_type = &PyType_Type;
2353 WinListType.ob_type = &PyType_Type;
2354 CurrentType.ob_type = &PyType_Type;
2355
2356 /* Set sys.argv[] to avoid a crash in warn(). */
2357 PySys_SetArgv(1, argv);
2358
2359 mod = Py_InitModule4("vim", VimMethods, (char *)NULL, (PyObject *)NULL, PYTHON_API_VERSION);
2360 dict = PyModule_GetDict(mod);
2361
2362 VimError = Py_BuildValue("s", "vim.error");
2363
2364 PyDict_SetItemString(dict, "error", VimError);
2365 PyDict_SetItemString(dict, "buffers", (PyObject *)(void *)&TheBufferList);
2366 PyDict_SetItemString(dict, "current", (PyObject *)(void *)&TheCurrent);
2367 PyDict_SetItemString(dict, "windows", (PyObject *)(void *)&TheWindowList);
2368
2369 if (PyErr_Occurred())
2370 return -1;
2371
2372 return 0;
2373 }
2374
2375 /*************************************************************************
2376 * 4. Utility functions for handling the interface between Vim and Python.
2377 */
2378
2379 /* Get a line from the specified buffer. The line number is
2380 * in Vim format (1-based). The line is returned as a Python
2381 * string object.
2382 */
2383 static PyObject *
2384 GetBufferLine(buf_T *buf, PyInt n)
2385 {
2386 return LineToString((char *)ml_get_buf(buf, (linenr_T)n, FALSE));
2387 }
2388
2389 /* Get a list of lines from the specified buffer. The line numbers
2390 * are in Vim format (1-based). The range is from lo up to, but not
2391 * including, hi. The list is returned as a Python list of string objects.
2392 */
2393 static PyObject *
2394 GetBufferLineList(buf_T *buf, PyInt lo, PyInt hi)
2395 {
2396 PyInt i;
2397 PyInt n = hi - lo;
2398 PyObject *list = PyList_New(n);
2399
2400 if (list == NULL)
2401 return NULL;
2402
2403 for (i = 0; i < n; ++i)
2404 {
2405 PyObject *str = LineToString((char *)ml_get_buf(buf, (linenr_T)(lo+i), FALSE));
2406
2407 /* Error check - was the Python string creation OK? */
2408 if (str == NULL)
2409 {
2410 Py_DECREF(list);
2411 return NULL;
2412 }
2413
2414 /* Set the list item */
2415 if (PyList_SetItem(list, i, str))
2416 {
2417 Py_DECREF(str);
2418 Py_DECREF(list);
2419 return NULL;
2420 }
2421 }
2422
2423 /* The ownership of the Python list is passed to the caller (ie,
2424 * the caller should Py_DECREF() the object when it is finished
2425 * with it).
2426 */
2427
2428 return list;
2429 }
2430
2431 /*
2432 * Check if deleting lines made the cursor position invalid.
2433 * Changed the lines from "lo" to "hi" and added "extra" lines (negative if
2434 * deleted).
2435 */
2436 static void
2437 py_fix_cursor(linenr_T lo, linenr_T hi, linenr_T extra)
2438 {
2439 if (curwin->w_cursor.lnum >= lo)
2440 {
2441 /* Adjust the cursor position if it's in/after the changed
2442 * lines. */
2443 if (curwin->w_cursor.lnum >= hi)
2444 {
2445 curwin->w_cursor.lnum += extra;
2446 check_cursor_col();
2447 }
2448 else if (extra < 0)
2449 {
2450 curwin->w_cursor.lnum = lo;
2451 check_cursor();
2452 }
2453 else
2454 check_cursor_col();
2455 changed_cline_bef_curs();
2456 }
2457 invalidate_botline();
2458 }
2459
2460 /* Replace a line in the specified buffer. The line number is
2461 * in Vim format (1-based). The replacement line is given as
2462 * a Python string object. The object is checked for validity
2463 * and correct format. Errors are returned as a value of FAIL.
2464 * The return value is OK on success.
2465 * If OK is returned and len_change is not NULL, *len_change
2466 * is set to the change in the buffer length.
2467 */
2468 static int
2469 SetBufferLine(buf_T *buf, PyInt n, PyObject *line, PyInt *len_change)
2470 {
2471 /* First of all, we check the thpe of the supplied Python object.
2472 * There are three cases:
2473 * 1. NULL, or None - this is a deletion.
2474 * 2. A string - this is a replacement.
2475 * 3. Anything else - this is an error.
2476 */
2477 if (line == Py_None || line == NULL)
2478 {
2479 buf_T *savebuf = curbuf;
2480
2481 PyErr_Clear();
2482 curbuf = buf;
2483
2484 if (u_savedel((linenr_T)n, 1L) == FAIL)
2485 PyErr_SetVim(_("cannot save undo information"));
2486 else if (ml_delete((linenr_T)n, FALSE) == FAIL)
2487 PyErr_SetVim(_("cannot delete line"));
2488 else
2489 {
2490 deleted_lines_mark((linenr_T)n, 1L);
2491 if (buf == curwin->w_buffer)
2492 py_fix_cursor((linenr_T)n, (linenr_T)n + 1, (linenr_T)-1);
2493 }
2494
2495 curbuf = savebuf;
2496
2497 if (PyErr_Occurred() || VimErrorCheck())
2498 return FAIL;
2499
2500 if (len_change)
2501 *len_change = -1;
2502
2503 return OK;
2504 }
2505 else if (PyString_Check(line))
2506 {
2507 char *save = StringToLine(line);
2508 buf_T *savebuf = curbuf;
2509
2510 if (save == NULL)
2511 return FAIL;
2512
2513 /* We do not need to free "save" if ml_replace() consumes it. */
2514 PyErr_Clear();
2515 curbuf = buf;
2516
2517 if (u_savesub((linenr_T)n) == FAIL)
2518 {
2519 PyErr_SetVim(_("cannot save undo information"));
2520 vim_free(save);
2521 }
2522 else if (ml_replace((linenr_T)n, (char_u *)save, FALSE) == FAIL)
2523 {
2524 PyErr_SetVim(_("cannot replace line"));
2525 vim_free(save);
2526 }
2527 else
2528 changed_bytes((linenr_T)n, 0);
2529
2530 curbuf = savebuf;
2531
2532 /* Check that the cursor is not beyond the end of the line now. */
2533 if (buf == curwin->w_buffer)
2534 check_cursor_col();
2535
2536 if (PyErr_Occurred() || VimErrorCheck())
2537 return FAIL;
2538
2539 if (len_change)
2540 *len_change = 0;
2541
2542 return OK;
2543 }
2544 else
2545 {
2546 PyErr_BadArgument();
2547 return FAIL;
2548 }
2549 }
2550
2551 /* Replace a range of lines in the specified buffer. The line numbers are in
2552 * Vim format (1-based). The range is from lo up to, but not including, hi.
2553 * The replacement lines are given as a Python list of string objects. The
2554 * list is checked for validity and correct format. Errors are returned as a
2555 * value of FAIL. The return value is OK on success.
2556 * If OK is returned and len_change is not NULL, *len_change
2557 * is set to the change in the buffer length.
2558 */
2559 static int
2560 SetBufferLineList(buf_T *buf, PyInt lo, PyInt hi, PyObject *list, PyInt *len_change)
2561 {
2562 /* First of all, we check the thpe of the supplied Python object.
2563 * There are three cases:
2564 * 1. NULL, or None - this is a deletion.
2565 * 2. A list - this is a replacement.
2566 * 3. Anything else - this is an error.
2567 */
2568 if (list == Py_None || list == NULL)
2569 {
2570 PyInt i;
2571 PyInt n = (int)(hi - lo);
2572 buf_T *savebuf = curbuf;
2573
2574 PyErr_Clear();
2575 curbuf = buf;
2576
2577 if (u_savedel((linenr_T)lo, (long)n) == FAIL)
2578 PyErr_SetVim(_("cannot save undo information"));
2579 else
2580 {
2581 for (i = 0; i < n; ++i)
2582 {
2583 if (ml_delete((linenr_T)lo, FALSE) == FAIL)
2584 {
2585 PyErr_SetVim(_("cannot delete line"));
2586 break;
2587 }
2588 }
2589 deleted_lines_mark((linenr_T)lo, (long)i);
2590
2591 if (buf == curwin->w_buffer)
2592 py_fix_cursor((linenr_T)lo, (linenr_T)hi, (linenr_T)-n);
2593 }
2594
2595 curbuf = savebuf;
2596
2597 if (PyErr_Occurred() || VimErrorCheck())
2598 return FAIL;
2599
2600 if (len_change)
2601 *len_change = -n;
2602
2603 return OK;
2604 }
2605 else if (PyList_Check(list))
2606 {
2607 PyInt i;
2608 PyInt new_len = PyList_Size(list);
2609 PyInt old_len = hi - lo;
2610 PyInt extra = 0; /* lines added to text, can be negative */
2611 char **array;
2612 buf_T *savebuf;
2613
2614 if (new_len == 0) /* avoid allocating zero bytes */
2615 array = NULL;
2616 else
2617 {
2618 array = (char **)alloc((unsigned)(new_len * sizeof(char *)));
2619 if (array == NULL)
2620 {
2621 PyErr_NoMemory();
2622 return FAIL;
2623 }
2624 }
2625
2626 for (i = 0; i < new_len; ++i)
2627 {
2628 PyObject *line = PyList_GetItem(list, i);
2629
2630 array[i] = StringToLine(line);
2631 if (array[i] == NULL)
2632 {
2633 while (i)
2634 vim_free(array[--i]);
2635 vim_free(array);
2636 return FAIL;
2637 }
2638 }
2639
2640 savebuf = curbuf;
2641
2642 PyErr_Clear();
2643 curbuf = buf;
2644
2645 if (u_save((linenr_T)(lo-1), (linenr_T)hi) == FAIL)
2646 PyErr_SetVim(_("cannot save undo information"));
2647
2648 /* If the size of the range is reducing (ie, new_len < old_len) we
2649 * need to delete some old_len. We do this at the start, by
2650 * repeatedly deleting line "lo".
2651 */
2652 if (!PyErr_Occurred())
2653 {
2654 for (i = 0; i < old_len - new_len; ++i)
2655 if (ml_delete((linenr_T)lo, FALSE) == FAIL)
2656 {
2657 PyErr_SetVim(_("cannot delete line"));
2658 break;
2659 }
2660 extra -= i;
2661 }
2662
2663 /* For as long as possible, replace the existing old_len with the
2664 * new old_len. This is a more efficient operation, as it requires
2665 * less memory allocation and freeing.
2666 */
2667 if (!PyErr_Occurred())
2668 {
2669 for (i = 0; i < old_len && i < new_len; ++i)
2670 if (ml_replace((linenr_T)(lo+i), (char_u *)array[i], FALSE)
2671 == FAIL)
2672 {
2673 PyErr_SetVim(_("cannot replace line"));
2674 break;
2675 }
2676 }
2677 else
2678 i = 0;
2679
2680 /* Now we may need to insert the remaining new old_len. If we do, we
2681 * must free the strings as we finish with them (we can't pass the
2682 * responsibility to vim in this case).
2683 */
2684 if (!PyErr_Occurred())
2685 {
2686 while (i < new_len)
2687 {
2688 if (ml_append((linenr_T)(lo + i - 1),
2689 (char_u *)array[i], 0, FALSE) == FAIL)
2690 {
2691 PyErr_SetVim(_("cannot insert line"));
2692 break;
2693 }
2694 vim_free(array[i]);
2695 ++i;
2696 ++extra;
2697 }
2698 }
2699
2700 /* Free any left-over old_len, as a result of an error */
2701 while (i < new_len)
2702 {
2703 vim_free(array[i]);
2704 ++i;
2705 }
2706
2707 /* Free the array of old_len. All of its contents have now
2708 * been dealt with (either freed, or the responsibility passed
2709 * to vim.
2710 */
2711 vim_free(array);
2712
2713 /* Adjust marks. Invalidate any which lie in the
2714 * changed range, and move any in the remainder of the buffer.
2715 */
2716 mark_adjust((linenr_T)lo, (linenr_T)(hi - 1),
2717 (long)MAXLNUM, (long)extra);
2718 changed_lines((linenr_T)lo, 0, (linenr_T)hi, (long)extra);
2719
2720 if (buf == curwin->w_buffer)
2721 py_fix_cursor((linenr_T)lo, (linenr_T)hi, (linenr_T)extra);
2722
2723 curbuf = savebuf;
2724
2725 if (PyErr_Occurred() || VimErrorCheck())
2726 return FAIL;
2727
2728 if (len_change)
2729 *len_change = new_len - old_len;
2730
2731 return OK;
2732 }
2733 else
2734 {
2735 PyErr_BadArgument();
2736 return FAIL;
2737 }
2738 }
2739
2740 /* Insert a number of lines into the specified buffer after the specifed line.
2741 * The line number is in Vim format (1-based). The lines to be inserted are
2742 * given as a Python list of string objects or as a single string. The lines
2743 * to be added are checked for validity and correct format. Errors are
2744 * returned as a value of FAIL. The return value is OK on success.
2745 * If OK is returned and len_change is not NULL, *len_change
2746 * is set to the change in the buffer length.
2747 */
2748 static int
2749 InsertBufferLines(buf_T *buf, PyInt n, PyObject *lines, PyInt *len_change)
2750 {
2751 /* First of all, we check the type of the supplied Python object.
2752 * It must be a string or a list, or the call is in error.
2753 */
2754 if (PyString_Check(lines))
2755 {
2756 char *str = StringToLine(lines);
2757 buf_T *savebuf;
2758
2759 if (str == NULL)
2760 return FAIL;
2761
2762 savebuf = curbuf;
2763
2764 PyErr_Clear();
2765 curbuf = buf;
2766
2767 if (u_save((linenr_T)n, (linenr_T)(n+1)) == FAIL)
2768 PyErr_SetVim(_("cannot save undo information"));
2769 else if (ml_append((linenr_T)n, (char_u *)str, 0, FALSE) == FAIL)
2770 PyErr_SetVim(_("cannot insert line"));
2771 else
2772 appended_lines_mark((linenr_T)n, 1L);
2773
2774 vim_free(str);
2775 curbuf = savebuf;
2776 update_screen(VALID);
2777
2778 if (PyErr_Occurred() || VimErrorCheck())
2779 return FAIL;
2780
2781 if (len_change)
2782 *len_change = 1;
2783
2784 return OK;
2785 }
2786 else if (PyList_Check(lines))
2787 {
2788 PyInt i;
2789 PyInt size = PyList_Size(lines);
2790 char **array;
2791 buf_T *savebuf;
2792
2793 array = (char **)alloc((unsigned)(size * sizeof(char *)));
2794 if (array == NULL)
2795 {
2796 PyErr_NoMemory();
2797 return FAIL;
2798 }
2799
2800 for (i = 0; i < size; ++i)
2801 {
2802 PyObject *line = PyList_GetItem(lines, i);
2803 array[i] = StringToLine(line);
2804
2805 if (array[i] == NULL)
2806 {
2807 while (i)
2808 vim_free(array[--i]);
2809 vim_free(array);
2810 return FAIL;
2811 }
2812 }
2813
2814 savebuf = curbuf;
2815
2816 PyErr_Clear();
2817 curbuf = buf;
2818
2819 if (u_save((linenr_T)n, (linenr_T)(n + 1)) == FAIL)
2820 PyErr_SetVim(_("cannot save undo information"));
2821 else
2822 {
2823 for (i = 0; i < size; ++i)
2824 {
2825 if (ml_append((linenr_T)(n + i),
2826 (char_u *)array[i], 0, FALSE) == FAIL)
2827 {
2828 PyErr_SetVim(_("cannot insert line"));
2829
2830 /* Free the rest of the lines */
2831 while (i < size)
2832 vim_free(array[i++]);
2833
2834 break;
2835 }
2836 vim_free(array[i]);
2837 }
2838 if (i > 0)
2839 appended_lines_mark((linenr_T)n, (long)i);
2840 }
2841
2842 /* Free the array of lines. All of its contents have now
2843 * been freed.
2844 */
2845 vim_free(array);
2846
2847 curbuf = savebuf;
2848 update_screen(VALID);
2849
2850 if (PyErr_Occurred() || VimErrorCheck())
2851 return FAIL;
2852
2853 if (len_change)
2854 *len_change = size;
2855
2856 return OK;
2857 }
2858 else
2859 {
2860 PyErr_BadArgument();
2861 return FAIL;
2862 }
2863 }
2864
2865 /* Convert a Vim line into a Python string.
2866 * All internal newlines are replaced by null characters.
2867 *
2868 * On errors, the Python exception data is set, and NULL is returned.
2869 */
2870 static PyObject *
2871 LineToString(const char *str)
2872 {
2873 PyObject *result;
2874 PyInt len = strlen(str);
2875 char *p;
2876
2877 /* Allocate an Python string object, with uninitialised contents. We
2878 * must do it this way, so that we can modify the string in place
2879 * later. See the Python source, Objects/stringobject.c for details.
2880 */
2881 result = PyString_FromStringAndSize(NULL, len);
2882 if (result == NULL)
2883 return NULL;
2884
2885 p = PyString_AsString(result);
2886
2887 while (*str)
2888 {
2889 if (*str == '\n')
2890 *p = '\0';
2891 else
2892 *p = *str;
2893
2894 ++p;
2895 ++str;
2896 }
2897
2898 return result;
2899 }
2900
2901 /* Convert a Python string into a Vim line.
2902 *
2903 * The result is in allocated memory. All internal nulls are replaced by
2904 * newline characters. It is an error for the string to contain newline
2905 * characters.
2906 *
2907 * On errors, the Python exception data is set, and NULL is returned.
2908 */
2909 static char *
2910 StringToLine(PyObject *obj)
2911 {
2912 const char *str;
2913 char *save;
2914 PyInt len;
2915 PyInt i;
2916 char *p;
2917
2918 if (obj == NULL || !PyString_Check(obj))
2919 {
2920 PyErr_BadArgument();
2921 return NULL;
2922 }
2923
2924 str = PyString_AsString(obj);
2925 len = PyString_Size(obj);
2926
2927 /*
2928 * Error checking: String must not contain newlines, as we
2929 * are replacing a single line, and we must replace it with
2930 * a single line.
2931 * A trailing newline is removed, so that append(f.readlines()) works.
2932 */
2933 p = memchr(str, '\n', len);
2934 if (p != NULL)
2935 {
2936 if (p == str + len - 1)
2937 --len;
2938 else
2939 {
2940 PyErr_SetVim(_("string cannot contain newlines"));
2941 return NULL;
2942 }
2943 }
2944
2945 /* Create a copy of the string, with internal nulls replaced by
2946 * newline characters, as is the vim convention.
2947 */
2948 save = (char *)alloc((unsigned)(len+1));
2949 if (save == NULL)
2950 {
2951 PyErr_NoMemory();
2952 return NULL;
2953 }
2954
2955 for (i = 0; i < len; ++i)
2956 {
2957 if (str[i] == '\0')
2958 save[i] = '\n';
2959 else
2960 save[i] = str[i];
2961 }
2962
2963 save[i] = '\0';
2964
2965 return save;
2966 }
2967
2968 /* Check to see whether a Vim error has been reported, or a keyboard
2969 * interrupt has been detected.
2970 */
2971 static int
2972 VimErrorCheck(void)
2973 {
2974 if (got_int)
2975 {
2976 PyErr_SetNone(PyExc_KeyboardInterrupt);
2977 return 1;
2978 }
2979 else if (did_emsg && !PyErr_Occurred())
2980 {
2981 PyErr_SetNone(VimError);
2982 return 1;
2983 }
2984
2985 return 0;
2986 }
2987
2988
2989 /* Don't generate a prototype for the next function, it generates an error on
2990 * newer Python versions. */
2991 #if PYTHON_API_VERSION < 1007 /* Python 1.4 */ && !defined(PROTO)
2992
2993 char *
2994 Py_GetProgramName(void)
2995 {
2996 return "vim";
2997 }
2998 #endif /* Python 1.4 */
Vim for the Mac