xref: /vim-8.2.3635/src/if_ruby.c (revision dee2e315) 
1 /* vi:set ts=8 sts=4 sw=4:
2  *
3  * VIM - Vi IMproved	by Bram Moolenaar
4  *
5  * Ruby interface by Shugo Maeda
6  *   with improvements by SegPhault (Ryan Paul)
7  *   with improvements by Jon Maken
8  *
9  * Do ":help uganda"  in Vim to read copying and usage conditions.
10  * Do ":help credits" in Vim to see a list of people who contributed.
11  * See README.txt for an overview of the Vim source code.
12  */
13 
14 #ifdef HAVE_CONFIG_H
15 # include "auto/config.h"
16 #endif
17 
18 #include <stdio.h>
19 #include <string.h>
20 
21 #ifdef _WIN32
22 # if !defined(DYNAMIC_RUBY_VER) || (DYNAMIC_RUBY_VER < 18)
23 #   define NT
24 # endif
25 # ifndef DYNAMIC_RUBY
26 #  define IMPORT /* For static dll usage __declspec(dllimport) */
27 #  define RUBYEXTERN __declspec(dllimport)
28 # endif
29 #endif
30 #ifndef RUBYEXTERN
31 # define RUBYEXTERN extern
32 #endif
33 
34 #ifdef DYNAMIC_RUBY
35 /*
36  * This is tricky.  In ruby.h there is (inline) function rb_class_of()
37  * definition.  This function use these variables.  But we want function to
38  * use dll_* variables.
39  */
40 # define rb_cFalseClass		(*dll_rb_cFalseClass)
41 # define rb_cFixnum		(*dll_rb_cFixnum)
42 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 20
43 #  define rb_cFloat		(*dll_rb_cFloat)
44 # endif
45 # define rb_cNilClass		(*dll_rb_cNilClass)
46 # define rb_cSymbol		(*dll_rb_cSymbol)
47 # define rb_cTrueClass		(*dll_rb_cTrueClass)
48 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
49 /*
50  * On ver 1.8, all Ruby functions are exported with "__declspec(dllimport)"
51  * in ruby.h.  But it causes trouble for these variables, because it is
52  * defined in this file.  When defined this RUBY_EXPORT it modified to
53  * "extern" and be able to avoid this problem.
54  */
55 #  define RUBY_EXPORT
56 # endif
57 
58 #if !(defined(WIN32) || defined(_WIN64))
59 # include <dlfcn.h>
60 # define HINSTANCE void*
61 # define RUBY_PROC void*
62 # define load_dll(n) dlopen((n), RTLD_LAZY|RTLD_GLOBAL)
63 # define symbol_from_dll dlsym
64 # define close_dll dlclose
65 #else
66 # define RUBY_PROC FARPROC
67 # define load_dll vimLoadLib
68 # define symbol_from_dll GetProcAddress
69 # define close_dll FreeLibrary
70 #endif
71 
72 #endif  /* ifdef DYNAMIC_RUBY */
73 
74 /* suggested by Ariya Mizutani */
75 #if (_MSC_VER == 1200)
76 # undef _WIN32_WINNT
77 #endif
78 
79 #if (defined(RUBY_VERSION) && RUBY_VERSION >= 19) \
80     || (defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 19)
81 # define RUBY19_OR_LATER 1
82 #endif
83 
84 #if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 19
85 /* Ruby 1.9 defines a number of static functions which use rb_num2long and
86  * rb_int2big */
87 # define rb_num2long rb_num2long_stub
88 # define rb_int2big rb_int2big_stub
89 #endif
90 
91 #if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 20 \
92 	&& SIZEOF_INT < SIZEOF_LONG
93 /* Ruby 2.0 defines a number of static functions which use rb_fix2int and
94  * rb_num2int if SIZEOF_INT < SIZEOF_LONG (64bit) */
95 # define rb_fix2int rb_fix2int_stub
96 # define rb_num2int rb_num2int_stub
97 #endif
98 
99 #include <ruby.h>
100 #ifdef RUBY19_OR_LATER
101 # include <ruby/encoding.h>
102 #endif
103 
104 #undef off_t	/* ruby defines off_t as _int64, Mingw uses long */
105 #undef EXTERN
106 #undef _
107 
108 /* T_DATA defined both by Ruby and Mac header files, hack around it... */
109 #if defined(MACOS_X_UNIX) || defined(macintosh)
110 # define __OPENTRANSPORT__
111 # define __OPENTRANSPORTPROTOCOL__
112 # define __OPENTRANSPORTPROVIDERS__
113 #endif
114 
115 /*
116  * Backward compatibility for Ruby 1.8 and earlier.
117  * Ruby 1.9 does not provide STR2CSTR, instead StringValuePtr is provided.
118  * Ruby 1.9 does not provide RXXX(s)->len and RXXX(s)->ptr, instead
119  * RXXX_LEN(s) and RXXX_PTR(s) are provided.
120  */
121 #ifndef StringValuePtr
122 # define StringValuePtr(s) STR2CSTR(s)
123 #endif
124 #ifndef RARRAY_LEN
125 # define RARRAY_LEN(s) RARRAY(s)->len
126 #endif
127 #ifndef RARRAY_PTR
128 # define RARRAY_PTR(s) RARRAY(s)->ptr
129 #endif
130 #ifndef RSTRING_LEN
131 # define RSTRING_LEN(s) RSTRING(s)->len
132 #endif
133 #ifndef RSTRING_PTR
134 # define RSTRING_PTR(s) RSTRING(s)->ptr
135 #endif
136 
137 #include "vim.h"
138 #include "version.h"
139 
140 #if defined(PROTO) && !defined(FEAT_RUBY)
141 /* Define these to be able to generate the function prototypes. */
142 # define VALUE int
143 # define RUBY_DATA_FUNC int
144 #endif
145 
146 static int ruby_initialized = 0;
147 static void *ruby_stack_start;
148 static VALUE objtbl;
149 
150 static VALUE mVIM;
151 static VALUE cBuffer;
152 static VALUE cVimWindow;
153 static VALUE eDeletedBufferError;
154 static VALUE eDeletedWindowError;
155 
156 static int ensure_ruby_initialized(void);
157 static void error_print(int);
158 static void ruby_io_init(void);
159 static void ruby_vim_init(void);
160 
161 #if defined(RUBY19_OR_LATER) || defined(RUBY_INIT_STACK)
162 # if defined(__ia64) && !defined(ruby_init_stack)
163 #  define ruby_init_stack(addr) ruby_init_stack((addr), rb_ia64_bsp())
164 # endif
165 #endif
166 
167 #if defined(DYNAMIC_RUBY) || defined(PROTO)
168 # ifdef PROTO
169 #  define HINSTANCE int		/* for generating prototypes */
170 # endif
171 
172 /*
173  * Wrapper defines
174  */
175 # define rb_assoc_new			dll_rb_assoc_new
176 # define rb_cObject			(*dll_rb_cObject)
177 # define rb_check_type			dll_rb_check_type
178 # define rb_class_path			dll_rb_class_path
179 # define rb_data_object_alloc		dll_rb_data_object_alloc
180 # define rb_define_class_under		dll_rb_define_class_under
181 # define rb_define_const			dll_rb_define_const
182 # define rb_define_global_function	dll_rb_define_global_function
183 # define rb_define_method		dll_rb_define_method
184 # define rb_define_module		dll_rb_define_module
185 # define rb_define_module_function	dll_rb_define_module_function
186 # define rb_define_singleton_method	dll_rb_define_singleton_method
187 # define rb_define_virtual_variable	dll_rb_define_virtual_variable
188 # define rb_stdout			(*dll_rb_stdout)
189 # define rb_eArgError			(*dll_rb_eArgError)
190 # define rb_eIndexError			(*dll_rb_eIndexError)
191 # define rb_eRuntimeError		(*dll_rb_eRuntimeError)
192 # define rb_eStandardError		(*dll_rb_eStandardError)
193 # define rb_eval_string_protect		dll_rb_eval_string_protect
194 # define rb_global_variable		dll_rb_global_variable
195 # define rb_hash_aset			dll_rb_hash_aset
196 # define rb_hash_new			dll_rb_hash_new
197 # define rb_inspect			dll_rb_inspect
198 # define rb_int2inum			dll_rb_int2inum
199 # if SIZEOF_INT < SIZEOF_LONG /* 64 bits only */
200 #  define rb_fix2int			dll_rb_fix2int
201 #  define rb_num2int			dll_rb_num2int
202 #  define rb_num2uint			dll_rb_num2uint
203 # endif
204 # define rb_lastline_get			dll_rb_lastline_get
205 # define rb_lastline_set			dll_rb_lastline_set
206 # define rb_load_protect			dll_rb_load_protect
207 # ifndef RUBY19_OR_LATER
208 #  define rb_num2long			dll_rb_num2long
209 # endif
210 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER <= 19
211 #  define rb_num2ulong			dll_rb_num2ulong
212 # endif
213 # define rb_obj_alloc			dll_rb_obj_alloc
214 # define rb_obj_as_string		dll_rb_obj_as_string
215 # define rb_obj_id			dll_rb_obj_id
216 # define rb_raise			dll_rb_raise
217 # define rb_str_cat			dll_rb_str_cat
218 # define rb_str_concat			dll_rb_str_concat
219 # define rb_str_new			dll_rb_str_new
220 # ifdef rb_str_new2
221 /* Ruby may #define rb_str_new2 to use rb_str_new_cstr. */
222 #  define need_rb_str_new_cstr 1
223 /* Ruby's headers #define rb_str_new_cstr to make use of GCC's
224  * __builtin_constant_p extension. */
225 #  undef rb_str_new_cstr
226 #  define rb_str_new_cstr		dll_rb_str_new_cstr
227 # else
228 #  define rb_str_new2			dll_rb_str_new2
229 # endif
230 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
231 #  define rb_string_value		dll_rb_string_value
232 #  define rb_string_value_ptr		dll_rb_string_value_ptr
233 #  define rb_float_new			dll_rb_float_new
234 #  define rb_ary_new			dll_rb_ary_new
235 #  define rb_ary_push			dll_rb_ary_push
236 #  if defined(RUBY19_OR_LATER) || defined(RUBY_INIT_STACK)
237 #   ifdef __ia64
238 #    define rb_ia64_bsp			dll_rb_ia64_bsp
239 #    undef ruby_init_stack
240 #    define ruby_init_stack(addr)	dll_ruby_init_stack((addr), rb_ia64_bsp())
241 #   else
242 #    define ruby_init_stack		dll_ruby_init_stack
243 #   endif
244 #  endif
245 # else
246 #  define rb_str2cstr			dll_rb_str2cstr
247 # endif
248 # ifdef RUBY19_OR_LATER
249 #  define rb_errinfo			dll_rb_errinfo
250 # else
251 #  define ruby_errinfo			(*dll_ruby_errinfo)
252 # endif
253 # define ruby_init			dll_ruby_init
254 # define ruby_init_loadpath		dll_ruby_init_loadpath
255 # ifdef WIN3264
256 #  define NtInitialize			dll_NtInitialize
257 #  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
258 #   define rb_w32_snprintf		dll_rb_w32_snprintf
259 #  endif
260 # endif
261 
262 # ifdef RUBY19_OR_LATER
263 #  define ruby_script			dll_ruby_script
264 #  define rb_enc_find_index		dll_rb_enc_find_index
265 #  define rb_enc_find			dll_rb_enc_find
266 #  define rb_enc_str_new			dll_rb_enc_str_new
267 #  define rb_sprintf			dll_rb_sprintf
268 #  define rb_require			dll_rb_require
269 #  define ruby_process_options		dll_ruby_process_options
270 # endif
271 
272 /*
273  * Pointers for dynamic link
274  */
275 static VALUE (*dll_rb_assoc_new) (VALUE, VALUE);
276 VALUE *dll_rb_cFalseClass;
277 VALUE *dll_rb_cFixnum;
278 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 20
279 VALUE *dll_rb_cFloat;
280 # endif
281 VALUE *dll_rb_cNilClass;
282 static VALUE *dll_rb_cObject;
283 VALUE *dll_rb_cSymbol;
284 VALUE *dll_rb_cTrueClass;
285 static void (*dll_rb_check_type) (VALUE,int);
286 static VALUE (*dll_rb_class_path) (VALUE);
287 static VALUE (*dll_rb_data_object_alloc) (VALUE, void*, RUBY_DATA_FUNC, RUBY_DATA_FUNC);
288 static VALUE (*dll_rb_define_class_under) (VALUE, const char*, VALUE);
289 static void (*dll_rb_define_const) (VALUE,const char*,VALUE);
290 static void (*dll_rb_define_global_function) (const char*,VALUE(*)(),int);
291 static void (*dll_rb_define_method) (VALUE,const char*,VALUE(*)(),int);
292 static VALUE (*dll_rb_define_module) (const char*);
293 static void (*dll_rb_define_module_function) (VALUE,const char*,VALUE(*)(),int);
294 static void (*dll_rb_define_singleton_method) (VALUE,const char*,VALUE(*)(),int);
295 static void (*dll_rb_define_virtual_variable) (const char*,VALUE(*)(),void(*)());
296 static VALUE *dll_rb_stdout;
297 static VALUE *dll_rb_eArgError;
298 static VALUE *dll_rb_eIndexError;
299 static VALUE *dll_rb_eRuntimeError;
300 static VALUE *dll_rb_eStandardError;
301 static VALUE (*dll_rb_eval_string_protect) (const char*, int*);
302 static void (*dll_rb_global_variable) (VALUE*);
303 static VALUE (*dll_rb_hash_aset) (VALUE, VALUE, VALUE);
304 static VALUE (*dll_rb_hash_new) (void);
305 static VALUE (*dll_rb_inspect) (VALUE);
306 static VALUE (*dll_rb_int2inum) (long);
307 # if SIZEOF_INT < SIZEOF_LONG /* 64 bits only */
308 static long (*dll_rb_fix2int) (VALUE);
309 static long (*dll_rb_num2int) (VALUE);
310 static unsigned long (*dll_rb_num2uint) (VALUE);
311 # endif
312 static VALUE (*dll_rb_lastline_get) (void);
313 static void (*dll_rb_lastline_set) (VALUE);
314 static void (*dll_rb_load_protect) (VALUE, int, int*);
315 static long (*dll_rb_num2long) (VALUE);
316 static unsigned long (*dll_rb_num2ulong) (VALUE);
317 static VALUE (*dll_rb_obj_alloc) (VALUE);
318 static VALUE (*dll_rb_obj_as_string) (VALUE);
319 static VALUE (*dll_rb_obj_id) (VALUE);
320 static void (*dll_rb_raise) (VALUE, const char*, ...);
321 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
322 static VALUE (*dll_rb_string_value) (volatile VALUE*);
323 # else
324 static char *(*dll_rb_str2cstr) (VALUE,int*);
325 # endif
326 static VALUE (*dll_rb_str_cat) (VALUE, const char*, long);
327 static VALUE (*dll_rb_str_concat) (VALUE, VALUE);
328 static VALUE (*dll_rb_str_new) (const char*, long);
329 # ifdef need_rb_str_new_cstr
330 /* Ruby may #define rb_str_new2 to use rb_str_new_cstr. */
331 static VALUE (*dll_rb_str_new_cstr) (const char*);
332 # else
333 static VALUE (*dll_rb_str_new2) (const char*);
334 # endif
335 # ifdef RUBY19_OR_LATER
336 static VALUE (*dll_rb_errinfo) (void);
337 # else
338 static VALUE *dll_ruby_errinfo;
339 # endif
340 static void (*dll_ruby_init) (void);
341 static void (*dll_ruby_init_loadpath) (void);
342 # ifdef WIN3264
343 static void (*dll_NtInitialize) (int*, char***);
344 #  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
345 static int (*dll_rb_w32_snprintf)(char*, size_t, const char*, ...);
346 #  endif
347 # endif
348 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
349 static char * (*dll_rb_string_value_ptr) (volatile VALUE*);
350 static VALUE (*dll_rb_float_new) (double);
351 static VALUE (*dll_rb_ary_new) (void);
352 static VALUE (*dll_rb_ary_push) (VALUE, VALUE);
353 #  if defined(RUBY19_OR_LATER) || defined(RUBY_INIT_STACK)
354 #   ifdef __ia64
355 static void * (*dll_rb_ia64_bsp) (void);
356 static void (*dll_ruby_init_stack)(VALUE*, void*);
357 #   else
358 static void (*dll_ruby_init_stack)(VALUE*);
359 #   endif
360 #  endif
361 # endif
362 # ifdef RUBY19_OR_LATER
363 static VALUE (*dll_rb_int2big)(SIGNED_VALUE);
364 # endif
365 
366 # ifdef RUBY19_OR_LATER
367 static void (*dll_ruby_script) (const char*);
368 static int (*dll_rb_enc_find_index) (const char*);
369 static rb_encoding* (*dll_rb_enc_find) (const char*);
370 static VALUE (*dll_rb_enc_str_new) (const char*, long, rb_encoding*);
371 static VALUE (*dll_rb_sprintf) (const char*, ...);
372 static VALUE (*dll_rb_require) (const char*);
373 static void* (*ruby_process_options)(int, char**);
374 # endif
375 
376 # if defined(RUBY19_OR_LATER) && !defined(PROTO)
377 SIGNED_VALUE rb_num2long_stub(VALUE x)
378 {
379     return dll_rb_num2long(x);
380 }
381 VALUE rb_int2big_stub(SIGNED_VALUE x)
382 {
383     return dll_rb_int2big(x);
384 }
385 #  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 20 \
386 	&& SIZEOF_INT < SIZEOF_LONG
387 long rb_fix2int_stub(VALUE x)
388 {
389     return dll_rb_fix2int(x);
390 }
391 long rb_num2int_stub(VALUE x)
392 {
393     return dll_rb_num2int(x);
394 }
395 #  endif
396 #  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 20
397 VALUE
398 rb_float_new_in_heap(double d)
399 {
400     return dll_rb_float_new(d);
401 }
402 VALUE rb_num2ulong(VALUE x)
403 {
404     return (long)RSHIFT((SIGNED_VALUE)(x),1);
405 }
406 #  endif
407 # endif
408 
409 static HINSTANCE hinstRuby = NULL; /* Instance of ruby.dll */
410 
411 /*
412  * Table of name to function pointer of ruby.
413  */
414 static struct
415 {
416     char *name;
417     RUBY_PROC *ptr;
418 } ruby_funcname_table[] =
419 {
420     {"rb_assoc_new", (RUBY_PROC*)&dll_rb_assoc_new},
421     {"rb_cFalseClass", (RUBY_PROC*)&dll_rb_cFalseClass},
422     {"rb_cFixnum", (RUBY_PROC*)&dll_rb_cFixnum},
423 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 20
424     {"rb_cFloat", (RUBY_PROC*)&dll_rb_cFloat},
425 # endif
426     {"rb_cNilClass", (RUBY_PROC*)&dll_rb_cNilClass},
427     {"rb_cObject", (RUBY_PROC*)&dll_rb_cObject},
428     {"rb_cSymbol", (RUBY_PROC*)&dll_rb_cSymbol},
429     {"rb_cTrueClass", (RUBY_PROC*)&dll_rb_cTrueClass},
430     {"rb_check_type", (RUBY_PROC*)&dll_rb_check_type},
431     {"rb_class_path", (RUBY_PROC*)&dll_rb_class_path},
432     {"rb_data_object_alloc", (RUBY_PROC*)&dll_rb_data_object_alloc},
433     {"rb_define_class_under", (RUBY_PROC*)&dll_rb_define_class_under},
434     {"rb_define_const", (RUBY_PROC*)&dll_rb_define_const},
435     {"rb_define_global_function", (RUBY_PROC*)&dll_rb_define_global_function},
436     {"rb_define_method", (RUBY_PROC*)&dll_rb_define_method},
437     {"rb_define_module", (RUBY_PROC*)&dll_rb_define_module},
438     {"rb_define_module_function", (RUBY_PROC*)&dll_rb_define_module_function},
439     {"rb_define_singleton_method", (RUBY_PROC*)&dll_rb_define_singleton_method},
440     {"rb_define_virtual_variable", (RUBY_PROC*)&dll_rb_define_virtual_variable},
441     {"rb_stdout", (RUBY_PROC*)&dll_rb_stdout},
442     {"rb_eArgError", (RUBY_PROC*)&dll_rb_eArgError},
443     {"rb_eIndexError", (RUBY_PROC*)&dll_rb_eIndexError},
444     {"rb_eRuntimeError", (RUBY_PROC*)&dll_rb_eRuntimeError},
445     {"rb_eStandardError", (RUBY_PROC*)&dll_rb_eStandardError},
446     {"rb_eval_string_protect", (RUBY_PROC*)&dll_rb_eval_string_protect},
447     {"rb_global_variable", (RUBY_PROC*)&dll_rb_global_variable},
448     {"rb_hash_aset", (RUBY_PROC*)&dll_rb_hash_aset},
449     {"rb_hash_new", (RUBY_PROC*)&dll_rb_hash_new},
450     {"rb_inspect", (RUBY_PROC*)&dll_rb_inspect},
451     {"rb_int2inum", (RUBY_PROC*)&dll_rb_int2inum},
452 # if SIZEOF_INT < SIZEOF_LONG /* 64 bits only */
453     {"rb_fix2int", (RUBY_PROC*)&dll_rb_fix2int},
454     {"rb_num2int", (RUBY_PROC*)&dll_rb_num2int},
455     {"rb_num2uint", (RUBY_PROC*)&dll_rb_num2uint},
456 # endif
457     {"rb_lastline_get", (RUBY_PROC*)&dll_rb_lastline_get},
458     {"rb_lastline_set", (RUBY_PROC*)&dll_rb_lastline_set},
459     {"rb_load_protect", (RUBY_PROC*)&dll_rb_load_protect},
460     {"rb_num2long", (RUBY_PROC*)&dll_rb_num2long},
461     {"rb_num2ulong", (RUBY_PROC*)&dll_rb_num2ulong},
462     {"rb_obj_alloc", (RUBY_PROC*)&dll_rb_obj_alloc},
463     {"rb_obj_as_string", (RUBY_PROC*)&dll_rb_obj_as_string},
464     {"rb_obj_id", (RUBY_PROC*)&dll_rb_obj_id},
465     {"rb_raise", (RUBY_PROC*)&dll_rb_raise},
466 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
467     {"rb_string_value", (RUBY_PROC*)&dll_rb_string_value},
468 # else
469     {"rb_str2cstr", (RUBY_PROC*)&dll_rb_str2cstr},
470 # endif
471     {"rb_str_cat", (RUBY_PROC*)&dll_rb_str_cat},
472     {"rb_str_concat", (RUBY_PROC*)&dll_rb_str_concat},
473     {"rb_str_new", (RUBY_PROC*)&dll_rb_str_new},
474 # ifdef need_rb_str_new_cstr
475     {"rb_str_new_cstr", (RUBY_PROC*)&dll_rb_str_new_cstr},
476 # else
477     {"rb_str_new2", (RUBY_PROC*)&dll_rb_str_new2},
478 # endif
479 # ifdef RUBY19_OR_LATER
480     {"rb_errinfo", (RUBY_PROC*)&dll_rb_errinfo},
481 # else
482     {"ruby_errinfo", (RUBY_PROC*)&dll_ruby_errinfo},
483 # endif
484     {"ruby_init", (RUBY_PROC*)&dll_ruby_init},
485     {"ruby_init_loadpath", (RUBY_PROC*)&dll_ruby_init_loadpath},
486 # ifdef WIN3264
487     {
488 #  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER < 19
489     "NtInitialize",
490 #  else
491     "ruby_sysinit",
492 #  endif
493 			(RUBY_PROC*)&dll_NtInitialize},
494 #  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
495     {"rb_w32_snprintf", (RUBY_PROC*)&dll_rb_w32_snprintf},
496 #  endif
497 # endif
498 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
499     {"rb_string_value_ptr", (RUBY_PROC*)&dll_rb_string_value_ptr},
500 #  if DYNAMIC_RUBY_VER <= 19
501     {"rb_float_new", (RUBY_PROC*)&dll_rb_float_new},
502 #  else
503     {"rb_float_new_in_heap", (RUBY_PROC*)&dll_rb_float_new},
504 #  endif
505     {"rb_ary_new", (RUBY_PROC*)&dll_rb_ary_new},
506     {"rb_ary_push", (RUBY_PROC*)&dll_rb_ary_push},
507 # endif
508 # ifdef RUBY19_OR_LATER
509     {"rb_int2big", (RUBY_PROC*)&dll_rb_int2big},
510     {"ruby_script", (RUBY_PROC*)&dll_ruby_script},
511     {"rb_enc_find_index", (RUBY_PROC*)&dll_rb_enc_find_index},
512     {"rb_enc_find", (RUBY_PROC*)&dll_rb_enc_find},
513     {"rb_enc_str_new", (RUBY_PROC*)&dll_rb_enc_str_new},
514     {"rb_sprintf", (RUBY_PROC*)&dll_rb_sprintf},
515     {"rb_require", (RUBY_PROC*)&dll_rb_require},
516     {"ruby_process_options", (RUBY_PROC*)&dll_ruby_process_options},
517 # endif
518 # if defined(RUBY19_OR_LATER) || defined(RUBY_INIT_STACK)
519 #  ifdef __ia64
520     {"rb_ia64_bsp", (RUBY_PROC*)&dll_rb_ia64_bsp},
521 #  endif
522     {"ruby_init_stack", (RUBY_PROC*)&dll_ruby_init_stack},
523 # endif
524     {"", NULL},
525 };
526 
527 /*
528  * Free ruby.dll
529  */
530     static void
531 end_dynamic_ruby()
532 {
533     if (hinstRuby)
534     {
535 	close_dll(hinstRuby);
536 	hinstRuby = NULL;
537     }
538 }
539 
540 /*
541  * Load library and get all pointers.
542  * Parameter 'libname' provides name of DLL.
543  * Return OK or FAIL.
544  */
545     static int
546 ruby_runtime_link_init(char *libname, int verbose)
547 {
548     int i;
549 
550     if (hinstRuby)
551 	return OK;
552     hinstRuby = load_dll(libname);
553     if (!hinstRuby)
554     {
555 	if (verbose)
556 	    EMSG2(_(e_loadlib), libname);
557 	return FAIL;
558     }
559 
560     for (i = 0; ruby_funcname_table[i].ptr; ++i)
561     {
562 	if (!(*ruby_funcname_table[i].ptr = symbol_from_dll(hinstRuby,
563 			ruby_funcname_table[i].name)))
564 	{
565 	    close_dll(hinstRuby);
566 	    hinstRuby = NULL;
567 	    if (verbose)
568 		EMSG2(_(e_loadfunc), ruby_funcname_table[i].name);
569 	    return FAIL;
570 	}
571     }
572     return OK;
573 }
574 
575 /*
576  * If ruby is enabled (there is installed ruby on Windows system) return TRUE,
577  * else FALSE.
578  */
579     int
580 ruby_enabled(verbose)
581     int		verbose;
582 {
583     return ruby_runtime_link_init(DYNAMIC_RUBY_DLL, verbose) == OK;
584 }
585 #endif /* defined(DYNAMIC_RUBY) || defined(PROTO) */
586 
587     void
588 ruby_end()
589 {
590 #ifdef DYNAMIC_RUBY
591     end_dynamic_ruby();
592 #endif
593 }
594 
595 void ex_ruby(exarg_T *eap)
596 {
597     int state;
598     char *script = NULL;
599 
600     script = (char *)script_get(eap, eap->arg);
601     if (!eap->skip && ensure_ruby_initialized())
602     {
603 	if (script == NULL)
604 	    rb_eval_string_protect((char *)eap->arg, &state);
605 	else
606 	    rb_eval_string_protect(script, &state);
607 	if (state)
608 	    error_print(state);
609     }
610     vim_free(script);
611 }
612 
613 /*
614  *  In Ruby 1.9 or later, ruby String object has encoding.
615  *  conversion buffer string of vim to ruby String object using
616  *  VIM encoding option.
617  */
618     static VALUE
619 vim_str2rb_enc_str(const char *s)
620 {
621 #ifdef RUBY19_OR_LATER
622     int isnum;
623     long lval;
624     char_u *sval;
625     rb_encoding *enc;
626 
627     isnum = get_option_value((char_u *)"enc", &lval, &sval, 0);
628     if (isnum == 0)
629     {
630 	enc = rb_enc_find((char *)sval);
631 	vim_free(sval);
632 	if (enc) {
633 	    return rb_enc_str_new(s, strlen(s), enc);
634 	}
635     }
636 #endif
637     return rb_str_new2(s);
638 }
639 
640     static VALUE
641 eval_enc_string_protect(const char *str, int *state)
642 {
643 #ifdef RUBY19_OR_LATER
644     int isnum;
645     long lval;
646     char_u *sval;
647     rb_encoding *enc;
648     VALUE v;
649 
650     isnum = get_option_value((char_u *)"enc", &lval, &sval, 0);
651     if (isnum == 0)
652     {
653 	enc = rb_enc_find((char *)sval);
654 	vim_free(sval);
655 	if (enc)
656 	{
657 	    v = rb_sprintf("#-*- coding:%s -*-\n%s", rb_enc_name(enc), str);
658 	    return rb_eval_string_protect(StringValuePtr(v), state);
659 	}
660     }
661 #endif
662     return rb_eval_string_protect(str, state);
663 }
664 
665 void ex_rubydo(exarg_T *eap)
666 {
667     int state;
668     linenr_T i;
669 
670     if (ensure_ruby_initialized())
671     {
672 	if (u_save(eap->line1 - 1, eap->line2 + 1) != OK)
673 	    return;
674 	for (i = eap->line1; i <= eap->line2; i++) {
675 	    VALUE line;
676 
677 	    line = vim_str2rb_enc_str((char *)ml_get(i));
678 	    rb_lastline_set(line);
679 	    eval_enc_string_protect((char *) eap->arg, &state);
680 	    if (state) {
681 		error_print(state);
682 		break;
683 	    }
684 	    line = rb_lastline_get();
685 	    if (!NIL_P(line)) {
686 		if (TYPE(line) != T_STRING) {
687 		    EMSG(_("E265: $_ must be an instance of String"));
688 		    return;
689 		}
690 		ml_replace(i, (char_u *) StringValuePtr(line), 1);
691 		changed();
692 #ifdef SYNTAX_HL
693 		syn_changed(i); /* recompute syntax hl. for this line */
694 #endif
695 	    }
696 	}
697 	check_cursor();
698 	update_curbuf(NOT_VALID);
699     }
700 }
701 
702 void ex_rubyfile(exarg_T *eap)
703 {
704     int state;
705 
706     if (ensure_ruby_initialized())
707     {
708 	rb_load_protect(rb_str_new2((char *) eap->arg), 0, &state);
709 	if (state) error_print(state);
710     }
711 }
712 
713 void ruby_buffer_free(buf_T *buf)
714 {
715     if (buf->b_ruby_ref)
716     {
717 	rb_hash_aset(objtbl, rb_obj_id((VALUE) buf->b_ruby_ref), Qnil);
718 	RDATA(buf->b_ruby_ref)->data = NULL;
719     }
720 }
721 
722 void ruby_window_free(win_T *win)
723 {
724     if (win->w_ruby_ref)
725     {
726 	rb_hash_aset(objtbl, rb_obj_id((VALUE) win->w_ruby_ref), Qnil);
727 	RDATA(win->w_ruby_ref)->data = NULL;
728     }
729 }
730 
731 static int ensure_ruby_initialized(void)
732 {
733     if (!ruby_initialized)
734     {
735 #ifdef DYNAMIC_RUBY
736 	if (ruby_enabled(TRUE))
737 	{
738 #endif
739 #ifdef _WIN32
740 	    /* suggested by Ariya Mizutani */
741 	    int argc = 1;
742 	    char *argv[] = {"gvim.exe"};
743 	    NtInitialize(&argc, &argv);
744 #endif
745 	    {
746 #if defined(RUBY19_OR_LATER) || defined(RUBY_INIT_STACK)
747 		ruby_init_stack(ruby_stack_start);
748 #endif
749 		ruby_init();
750 	    }
751 #ifdef RUBY19_OR_LATER
752 	    {
753 		int dummy_argc = 2;
754 		char *dummy_argv[] = {"vim-ruby", "-e0"};
755 		ruby_process_options(dummy_argc, dummy_argv);
756 	    }
757 	    ruby_script("vim-ruby");
758 #else
759 	    ruby_init_loadpath();
760 #endif
761 	    ruby_io_init();
762 	    ruby_vim_init();
763 	    ruby_initialized = 1;
764 #ifdef DYNAMIC_RUBY
765 	}
766 	else
767 	{
768 	    EMSG(_("E266: Sorry, this command is disabled, the Ruby library could not be loaded."));
769 	    return 0;
770 	}
771 #endif
772     }
773     return ruby_initialized;
774 }
775 
776 static void error_print(int state)
777 {
778 #ifndef DYNAMIC_RUBY
779 #if !(defined(RUBY_VERSION) && RUBY_VERSION >= 19) \
780     && !(defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 19)
781     RUBYEXTERN VALUE ruby_errinfo;
782 #endif
783 #endif
784     VALUE eclass;
785     VALUE einfo;
786     char buff[BUFSIZ];
787 
788 #define TAG_RETURN	0x1
789 #define TAG_BREAK	0x2
790 #define TAG_NEXT	0x3
791 #define TAG_RETRY	0x4
792 #define TAG_REDO	0x5
793 #define TAG_RAISE	0x6
794 #define TAG_THROW	0x7
795 #define TAG_FATAL	0x8
796 #define TAG_MASK	0xf
797 
798     switch (state) {
799     case TAG_RETURN:
800 	EMSG(_("E267: unexpected return"));
801 	break;
802     case TAG_NEXT:
803 	EMSG(_("E268: unexpected next"));
804 	break;
805     case TAG_BREAK:
806 	EMSG(_("E269: unexpected break"));
807 	break;
808     case TAG_REDO:
809 	EMSG(_("E270: unexpected redo"));
810 	break;
811     case TAG_RETRY:
812 	EMSG(_("E271: retry outside of rescue clause"));
813 	break;
814     case TAG_RAISE:
815     case TAG_FATAL:
816 #ifdef RUBY19_OR_LATER
817 	eclass = CLASS_OF(rb_errinfo());
818 	einfo = rb_obj_as_string(rb_errinfo());
819 #else
820 	eclass = CLASS_OF(ruby_errinfo);
821 	einfo = rb_obj_as_string(ruby_errinfo);
822 #endif
823 	if (eclass == rb_eRuntimeError && RSTRING_LEN(einfo) == 0) {
824 	    EMSG(_("E272: unhandled exception"));
825 	}
826 	else {
827 	    VALUE epath;
828 	    char *p;
829 
830 	    epath = rb_class_path(eclass);
831 	    vim_snprintf(buff, BUFSIZ, "%s: %s",
832 		     RSTRING_PTR(epath), RSTRING_PTR(einfo));
833 	    p = strchr(buff, '\n');
834 	    if (p) *p = '\0';
835 	    EMSG(buff);
836 	}
837 	break;
838     default:
839 	vim_snprintf(buff, BUFSIZ, _("E273: unknown longjmp status %d"), state);
840 	EMSG(buff);
841 	break;
842     }
843 }
844 
845 static VALUE vim_message(VALUE self UNUSED, VALUE str)
846 {
847     char *buff, *p;
848 
849     str = rb_obj_as_string(str);
850     if (RSTRING_LEN(str) > 0)
851     {
852 	/* Only do this when the string isn't empty, alloc(0) causes trouble. */
853 	buff = ALLOCA_N(char, RSTRING_LEN(str));
854 	strcpy(buff, RSTRING_PTR(str));
855 	p = strchr(buff, '\n');
856 	if (p) *p = '\0';
857 	MSG(buff);
858     }
859     else
860     {
861 	MSG("");
862     }
863     return Qnil;
864 }
865 
866 static VALUE vim_set_option(VALUE self UNUSED, VALUE str)
867 {
868     do_set((char_u *)StringValuePtr(str), 0);
869     update_screen(NOT_VALID);
870     return Qnil;
871 }
872 
873 static VALUE vim_command(VALUE self UNUSED, VALUE str)
874 {
875     do_cmdline_cmd((char_u *)StringValuePtr(str));
876     return Qnil;
877 }
878 
879 #ifdef FEAT_EVAL
880 static VALUE vim_to_ruby(typval_T *tv)
881 {
882     VALUE result = Qnil;
883 
884     if (tv->v_type == VAR_STRING)
885     {
886 	result = rb_str_new2(tv->vval.v_string == NULL
887 					  ? "" : (char *)(tv->vval.v_string));
888     }
889     else if (tv->v_type == VAR_NUMBER)
890     {
891 	result = INT2NUM(tv->vval.v_number);
892     }
893 # ifdef FEAT_FLOAT
894     else if (tv->v_type == VAR_FLOAT)
895     {
896 	result = rb_float_new(tv->vval.v_float);
897     }
898 # endif
899     else if (tv->v_type == VAR_LIST)
900     {
901 	list_T      *list = tv->vval.v_list;
902 	listitem_T  *curr;
903 
904 	result = rb_ary_new();
905 
906 	if (list != NULL)
907 	{
908 	    for (curr = list->lv_first; curr != NULL; curr = curr->li_next)
909 	    {
910 		rb_ary_push(result, vim_to_ruby(&curr->li_tv));
911 	    }
912 	}
913     }
914     else if (tv->v_type == VAR_DICT)
915     {
916 	result = rb_hash_new();
917 
918 	if (tv->vval.v_dict != NULL)
919 	{
920 	    hashtab_T   *ht = &tv->vval.v_dict->dv_hashtab;
921 	    long_u      todo = ht->ht_used;
922 	    hashitem_T  *hi;
923 	    dictitem_T  *di;
924 
925 	    for (hi = ht->ht_array; todo > 0; ++hi)
926 	    {
927 		if (!HASHITEM_EMPTY(hi))
928 		{
929 		    --todo;
930 
931 		    di = dict_lookup(hi);
932 		    rb_hash_aset(result, rb_str_new2((char *)hi->hi_key),
933 						     vim_to_ruby(&di->di_tv));
934 		}
935 	    }
936 	}
937     } /* else return Qnil; */
938 
939     return result;
940 }
941 #endif
942 
943 static VALUE vim_evaluate(VALUE self UNUSED, VALUE str)
944 {
945 #ifdef FEAT_EVAL
946     typval_T    *tv;
947     VALUE       result;
948 
949     tv = eval_expr((char_u *)StringValuePtr(str), NULL);
950     if (tv == NULL)
951     {
952 	return Qnil;
953     }
954     result = vim_to_ruby(tv);
955 
956     free_tv(tv);
957 
958     return result;
959 #else
960     return Qnil;
961 #endif
962 }
963 
964 static VALUE buffer_new(buf_T *buf)
965 {
966     if (buf->b_ruby_ref)
967     {
968 	return (VALUE) buf->b_ruby_ref;
969     }
970     else
971     {
972 	VALUE obj = Data_Wrap_Struct(cBuffer, 0, 0, buf);
973 	buf->b_ruby_ref = (void *) obj;
974 	rb_hash_aset(objtbl, rb_obj_id(obj), obj);
975 	return obj;
976     }
977 }
978 
979 static buf_T *get_buf(VALUE obj)
980 {
981     buf_T *buf;
982 
983     Data_Get_Struct(obj, buf_T, buf);
984     if (buf == NULL)
985 	rb_raise(eDeletedBufferError, "attempt to refer to deleted buffer");
986     return buf;
987 }
988 
989 static VALUE buffer_s_current()
990 {
991     return buffer_new(curbuf);
992 }
993 
994 static VALUE buffer_s_count()
995 {
996     buf_T *b;
997     int n = 0;
998 
999     for (b = firstbuf; b != NULL; b = b->b_next)
1000     {
1001 	/*  Deleted buffers should not be counted
1002 	 *    SegPhault - 01/07/05 */
1003 	if (b->b_p_bl)
1004 	    n++;
1005     }
1006 
1007     return INT2NUM(n);
1008 }
1009 
1010 static VALUE buffer_s_aref(VALUE self UNUSED, VALUE num)
1011 {
1012     buf_T *b;
1013     int n = NUM2INT(num);
1014 
1015     for (b = firstbuf; b != NULL; b = b->b_next)
1016     {
1017 	/*  Deleted buffers should not be counted
1018 	 *    SegPhault - 01/07/05 */
1019 	if (!b->b_p_bl)
1020 	    continue;
1021 
1022 	if (n == 0)
1023 	    return buffer_new(b);
1024 
1025 	n--;
1026     }
1027     return Qnil;
1028 }
1029 
1030 static VALUE buffer_name(VALUE self)
1031 {
1032     buf_T *buf = get_buf(self);
1033 
1034     return buf->b_ffname ? rb_str_new2((char *)buf->b_ffname) : Qnil;
1035 }
1036 
1037 static VALUE buffer_number(VALUE self)
1038 {
1039     buf_T *buf = get_buf(self);
1040 
1041     return INT2NUM(buf->b_fnum);
1042 }
1043 
1044 static VALUE buffer_count(VALUE self)
1045 {
1046     buf_T *buf = get_buf(self);
1047 
1048     return INT2NUM(buf->b_ml.ml_line_count);
1049 }
1050 
1051 static VALUE get_buffer_line(buf_T *buf, linenr_T n)
1052 {
1053     if (n <= 0 || n > buf->b_ml.ml_line_count)
1054 	rb_raise(rb_eIndexError, "line number %ld out of range", (long)n);
1055     return vim_str2rb_enc_str((char *)ml_get_buf(buf, n, FALSE));
1056 }
1057 
1058 static VALUE buffer_aref(VALUE self, VALUE num)
1059 {
1060     buf_T *buf = get_buf(self);
1061 
1062     if (buf != NULL)
1063 	return get_buffer_line(buf, (linenr_T)NUM2LONG(num));
1064     return Qnil; /* For stop warning */
1065 }
1066 
1067 static VALUE set_buffer_line(buf_T *buf, linenr_T n, VALUE str)
1068 {
1069     char	*line = StringValuePtr(str);
1070     aco_save_T	aco;
1071 
1072     if (n > 0 && n <= buf->b_ml.ml_line_count && line != NULL)
1073     {
1074 	/* set curwin/curbuf for "buf" and save some things */
1075 	aucmd_prepbuf(&aco, buf);
1076 
1077 	if (u_savesub(n) == OK) {
1078 	    ml_replace(n, (char_u *)line, TRUE);
1079 	    changed();
1080 #ifdef SYNTAX_HL
1081 	    syn_changed(n); /* recompute syntax hl. for this line */
1082 #endif
1083 	}
1084 
1085 	/* restore curwin/curbuf and a few other things */
1086 	aucmd_restbuf(&aco);
1087 	/* Careful: autocommands may have made "buf" invalid! */
1088 
1089 	update_curbuf(NOT_VALID);
1090     }
1091     else
1092     {
1093 	rb_raise(rb_eIndexError, "line number %ld out of range", (long)n);
1094     }
1095     return str;
1096 }
1097 
1098 static VALUE buffer_aset(VALUE self, VALUE num, VALUE str)
1099 {
1100     buf_T *buf = get_buf(self);
1101 
1102     if (buf != NULL)
1103 	return set_buffer_line(buf, (linenr_T)NUM2LONG(num), str);
1104     return str;
1105 }
1106 
1107 static VALUE buffer_delete(VALUE self, VALUE num)
1108 {
1109     buf_T	*buf = get_buf(self);
1110     long	n = NUM2LONG(num);
1111     aco_save_T	aco;
1112 
1113     if (n > 0 && n <= buf->b_ml.ml_line_count)
1114     {
1115 	/* set curwin/curbuf for "buf" and save some things */
1116 	aucmd_prepbuf(&aco, buf);
1117 
1118 	if (u_savedel(n, 1) == OK) {
1119 	    ml_delete(n, 0);
1120 
1121 	    /* Changes to non-active buffers should properly refresh
1122 	     *   SegPhault - 01/09/05 */
1123 	    deleted_lines_mark(n, 1L);
1124 
1125 	    changed();
1126 	}
1127 
1128 	/* restore curwin/curbuf and a few other things */
1129 	aucmd_restbuf(&aco);
1130 	/* Careful: autocommands may have made "buf" invalid! */
1131 
1132 	update_curbuf(NOT_VALID);
1133     }
1134     else
1135     {
1136 	rb_raise(rb_eIndexError, "line number %ld out of range", n);
1137     }
1138     return Qnil;
1139 }
1140 
1141 static VALUE buffer_append(VALUE self, VALUE num, VALUE str)
1142 {
1143     buf_T	*buf = get_buf(self);
1144     char	*line = StringValuePtr(str);
1145     long	n = NUM2LONG(num);
1146     aco_save_T	aco;
1147 
1148     if (line == NULL)
1149     {
1150 	rb_raise(rb_eIndexError, "NULL line");
1151     }
1152     else if (n >= 0 && n <= buf->b_ml.ml_line_count)
1153     {
1154 	/* set curwin/curbuf for "buf" and save some things */
1155 	aucmd_prepbuf(&aco, buf);
1156 
1157 	if (u_inssub(n + 1) == OK) {
1158 	    ml_append(n, (char_u *) line, (colnr_T) 0, FALSE);
1159 
1160 	    /*  Changes to non-active buffers should properly refresh screen
1161 	     *    SegPhault - 12/20/04 */
1162 	    appended_lines_mark(n, 1L);
1163 
1164 	    changed();
1165 	}
1166 
1167 	/* restore curwin/curbuf and a few other things */
1168 	aucmd_restbuf(&aco);
1169 	/* Careful: autocommands may have made "buf" invalid! */
1170 
1171 	update_curbuf(NOT_VALID);
1172     }
1173     else
1174     {
1175 	rb_raise(rb_eIndexError, "line number %ld out of range", n);
1176     }
1177     return str;
1178 }
1179 
1180 static VALUE window_new(win_T *win)
1181 {
1182     if (win->w_ruby_ref)
1183     {
1184 	return (VALUE) win->w_ruby_ref;
1185     }
1186     else
1187     {
1188 	VALUE obj = Data_Wrap_Struct(cVimWindow, 0, 0, win);
1189 	win->w_ruby_ref = (void *) obj;
1190 	rb_hash_aset(objtbl, rb_obj_id(obj), obj);
1191 	return obj;
1192     }
1193 }
1194 
1195 static win_T *get_win(VALUE obj)
1196 {
1197     win_T *win;
1198 
1199     Data_Get_Struct(obj, win_T, win);
1200     if (win == NULL)
1201 	rb_raise(eDeletedWindowError, "attempt to refer to deleted window");
1202     return win;
1203 }
1204 
1205 static VALUE window_s_current()
1206 {
1207     return window_new(curwin);
1208 }
1209 
1210 /*
1211  * Added line manipulation functions
1212  *    SegPhault - 03/07/05
1213  */
1214 static VALUE line_s_current()
1215 {
1216     return get_buffer_line(curbuf, curwin->w_cursor.lnum);
1217 }
1218 
1219 static VALUE set_current_line(VALUE self UNUSED, VALUE str)
1220 {
1221     return set_buffer_line(curbuf, curwin->w_cursor.lnum, str);
1222 }
1223 
1224 static VALUE current_line_number()
1225 {
1226     return INT2FIX((int)curwin->w_cursor.lnum);
1227 }
1228 
1229 
1230 
1231 static VALUE window_s_count()
1232 {
1233 #ifdef FEAT_WINDOWS
1234     win_T	*w;
1235     int n = 0;
1236 
1237     for (w = firstwin; w != NULL; w = w->w_next)
1238 	n++;
1239     return INT2NUM(n);
1240 #else
1241     return INT2NUM(1);
1242 #endif
1243 }
1244 
1245 static VALUE window_s_aref(VALUE self UNUSED, VALUE num)
1246 {
1247     win_T *w;
1248     int n = NUM2INT(num);
1249 
1250 #ifndef FEAT_WINDOWS
1251     w = curwin;
1252 #else
1253     for (w = firstwin; w != NULL; w = w->w_next, --n)
1254 #endif
1255 	if (n == 0)
1256 	    return window_new(w);
1257     return Qnil;
1258 }
1259 
1260 static VALUE window_buffer(VALUE self)
1261 {
1262     win_T *win = get_win(self);
1263 
1264     return buffer_new(win->w_buffer);
1265 }
1266 
1267 static VALUE window_height(VALUE self)
1268 {
1269     win_T *win = get_win(self);
1270 
1271     return INT2NUM(win->w_height);
1272 }
1273 
1274 static VALUE window_set_height(VALUE self, VALUE height)
1275 {
1276     win_T *win = get_win(self);
1277     win_T *savewin = curwin;
1278 
1279     curwin = win;
1280     win_setheight(NUM2INT(height));
1281     curwin = savewin;
1282     return height;
1283 }
1284 
1285 static VALUE window_width(VALUE self UNUSED)
1286 {
1287     return INT2NUM(W_WIDTH(get_win(self)));
1288 }
1289 
1290 static VALUE window_set_width(VALUE self UNUSED, VALUE width)
1291 {
1292 #ifdef FEAT_VERTSPLIT
1293     win_T *win = get_win(self);
1294     win_T *savewin = curwin;
1295 
1296     curwin = win;
1297     win_setwidth(NUM2INT(width));
1298     curwin = savewin;
1299 #endif
1300     return width;
1301 }
1302 
1303 static VALUE window_cursor(VALUE self)
1304 {
1305     win_T *win = get_win(self);
1306 
1307     return rb_assoc_new(INT2NUM(win->w_cursor.lnum), INT2NUM(win->w_cursor.col));
1308 }
1309 
1310 static VALUE window_set_cursor(VALUE self, VALUE pos)
1311 {
1312     VALUE lnum, col;
1313     win_T *win = get_win(self);
1314 
1315     Check_Type(pos, T_ARRAY);
1316     if (RARRAY_LEN(pos) != 2)
1317 	rb_raise(rb_eArgError, "array length must be 2");
1318     lnum = RARRAY_PTR(pos)[0];
1319     col = RARRAY_PTR(pos)[1];
1320     win->w_cursor.lnum = NUM2LONG(lnum);
1321     win->w_cursor.col = NUM2UINT(col);
1322     check_cursor();		    /* put cursor on an existing line */
1323     update_screen(NOT_VALID);
1324     return Qnil;
1325 }
1326 
1327 static VALUE f_nop(VALUE self UNUSED)
1328 {
1329     return Qnil;
1330 }
1331 
1332 static VALUE f_p(int argc, VALUE *argv, VALUE self UNUSED)
1333 {
1334     int i;
1335     VALUE str = rb_str_new("", 0);
1336 
1337     for (i = 0; i < argc; i++) {
1338 	if (i > 0) rb_str_cat(str, ", ", 2);
1339 	rb_str_concat(str, rb_inspect(argv[i]));
1340     }
1341     MSG(RSTRING_PTR(str));
1342     return Qnil;
1343 }
1344 
1345 static void ruby_io_init(void)
1346 {
1347 #ifndef DYNAMIC_RUBY
1348     RUBYEXTERN VALUE rb_stdout;
1349 #endif
1350 
1351     rb_stdout = rb_obj_alloc(rb_cObject);
1352     rb_define_singleton_method(rb_stdout, "write", vim_message, 1);
1353     rb_define_singleton_method(rb_stdout, "flush", f_nop, 0);
1354     rb_define_global_function("p", f_p, -1);
1355 }
1356 
1357 static void ruby_vim_init(void)
1358 {
1359     objtbl = rb_hash_new();
1360     rb_global_variable(&objtbl);
1361 
1362     /* The Vim module used to be called "VIM", but "Vim" is better.  Make an
1363      * alias "VIM" for backwards compatibility. */
1364     mVIM = rb_define_module("Vim");
1365     rb_define_const(rb_cObject, "VIM", mVIM);
1366     rb_define_const(mVIM, "VERSION_MAJOR", INT2NUM(VIM_VERSION_MAJOR));
1367     rb_define_const(mVIM, "VERSION_MINOR", INT2NUM(VIM_VERSION_MINOR));
1368     rb_define_const(mVIM, "VERSION_BUILD", INT2NUM(VIM_VERSION_BUILD));
1369     rb_define_const(mVIM, "VERSION_PATCHLEVEL", INT2NUM(VIM_VERSION_PATCHLEVEL));
1370     rb_define_const(mVIM, "VERSION_SHORT", rb_str_new2(VIM_VERSION_SHORT));
1371     rb_define_const(mVIM, "VERSION_MEDIUM", rb_str_new2(VIM_VERSION_MEDIUM));
1372     rb_define_const(mVIM, "VERSION_LONG", rb_str_new2(VIM_VERSION_LONG));
1373     rb_define_const(mVIM, "VERSION_LONG_DATE", rb_str_new2(VIM_VERSION_LONG_DATE));
1374     rb_define_module_function(mVIM, "message", vim_message, 1);
1375     rb_define_module_function(mVIM, "set_option", vim_set_option, 1);
1376     rb_define_module_function(mVIM, "command", vim_command, 1);
1377     rb_define_module_function(mVIM, "evaluate", vim_evaluate, 1);
1378 
1379     eDeletedBufferError = rb_define_class_under(mVIM, "DeletedBufferError",
1380 						rb_eStandardError);
1381     eDeletedWindowError = rb_define_class_under(mVIM, "DeletedWindowError",
1382 						rb_eStandardError);
1383 
1384     cBuffer = rb_define_class_under(mVIM, "Buffer", rb_cObject);
1385     rb_define_singleton_method(cBuffer, "current", buffer_s_current, 0);
1386     rb_define_singleton_method(cBuffer, "count", buffer_s_count, 0);
1387     rb_define_singleton_method(cBuffer, "[]", buffer_s_aref, 1);
1388     rb_define_method(cBuffer, "name", buffer_name, 0);
1389     rb_define_method(cBuffer, "number", buffer_number, 0);
1390     rb_define_method(cBuffer, "count", buffer_count, 0);
1391     rb_define_method(cBuffer, "length", buffer_count, 0);
1392     rb_define_method(cBuffer, "[]", buffer_aref, 1);
1393     rb_define_method(cBuffer, "[]=", buffer_aset, 2);
1394     rb_define_method(cBuffer, "delete", buffer_delete, 1);
1395     rb_define_method(cBuffer, "append", buffer_append, 2);
1396 
1397     /* Added line manipulation functions
1398      *   SegPhault - 03/07/05 */
1399     rb_define_method(cBuffer, "line_number", current_line_number, 0);
1400     rb_define_method(cBuffer, "line", line_s_current, 0);
1401     rb_define_method(cBuffer, "line=", set_current_line, 1);
1402 
1403 
1404     cVimWindow = rb_define_class_under(mVIM, "Window", rb_cObject);
1405     rb_define_singleton_method(cVimWindow, "current", window_s_current, 0);
1406     rb_define_singleton_method(cVimWindow, "count", window_s_count, 0);
1407     rb_define_singleton_method(cVimWindow, "[]", window_s_aref, 1);
1408     rb_define_method(cVimWindow, "buffer", window_buffer, 0);
1409     rb_define_method(cVimWindow, "height", window_height, 0);
1410     rb_define_method(cVimWindow, "height=", window_set_height, 1);
1411     rb_define_method(cVimWindow, "width", window_width, 0);
1412     rb_define_method(cVimWindow, "width=", window_set_width, 1);
1413     rb_define_method(cVimWindow, "cursor", window_cursor, 0);
1414     rb_define_method(cVimWindow, "cursor=", window_set_cursor, 1);
1415 
1416     rb_define_virtual_variable("$curbuf", buffer_s_current, 0);
1417     rb_define_virtual_variable("$curwin", window_s_current, 0);
1418 }
1419 
1420 void vim_ruby_init(void *stack_start)
1421 {
1422     /* should get machine stack start address early in main function */
1423     ruby_stack_start = stack_start;
1424 }
1425