xref: /vim-8.2.3635/src/if_ruby.c (revision e968e36a) 
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 >= 19 \
92 	&& VIM_SIZEOF_INT < VIM_SIZEOF_LONG
93 /* Ruby 1.9 defines a number of static functions which use rb_fix2int and
94  * rb_num2int if VIM_SIZEOF_INT < VIM_SIZEOF_LONG (64bit) */
95 # define rb_fix2int rb_fix2int_stub
96 # define rb_num2int rb_num2int_stub
97 #endif
98 
99 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 21
100 /* Ruby 2.1 adds new GC called RGenGC and RARRAY_PTR uses
101  * rb_gc_writebarrier_unprotect_promoted if USE_RGENGC  */
102 #  define rb_gc_writebarrier_unprotect_promoted rb_gc_writebarrier_unprotect_promoted_stub
103 # endif
104 
105 #include <ruby.h>
106 #ifdef RUBY19_OR_LATER
107 # include <ruby/encoding.h>
108 #endif
109 
110 #undef off_t	/* ruby defines off_t as _int64, Mingw uses long */
111 #undef EXTERN
112 #undef _
113 
114 /* T_DATA defined both by Ruby and Mac header files, hack around it... */
115 #if defined(MACOS_X_UNIX) || defined(macintosh)
116 # define __OPENTRANSPORT__
117 # define __OPENTRANSPORTPROTOCOL__
118 # define __OPENTRANSPORTPROVIDERS__
119 #endif
120 
121 /*
122  * Backward compatibility for Ruby 1.8 and earlier.
123  * Ruby 1.9 does not provide STR2CSTR, instead StringValuePtr is provided.
124  * Ruby 1.9 does not provide RXXX(s)->len and RXXX(s)->ptr, instead
125  * RXXX_LEN(s) and RXXX_PTR(s) are provided.
126  */
127 #ifndef StringValuePtr
128 # define StringValuePtr(s) STR2CSTR(s)
129 #endif
130 #ifndef RARRAY_LEN
131 # define RARRAY_LEN(s) RARRAY(s)->len
132 #endif
133 #ifndef RARRAY_PTR
134 # define RARRAY_PTR(s) RARRAY(s)->ptr
135 #endif
136 #ifndef RSTRING_LEN
137 # define RSTRING_LEN(s) RSTRING(s)->len
138 #endif
139 #ifndef RSTRING_PTR
140 # define RSTRING_PTR(s) RSTRING(s)->ptr
141 #endif
142 
143 #include "vim.h"
144 #include "version.h"
145 
146 #if defined(PROTO) && !defined(FEAT_RUBY)
147 /* Define these to be able to generate the function prototypes. */
148 # define VALUE int
149 # define RUBY_DATA_FUNC int
150 #endif
151 
152 static int ruby_initialized = 0;
153 static void *ruby_stack_start;
154 static VALUE objtbl;
155 
156 static VALUE mVIM;
157 static VALUE cBuffer;
158 static VALUE cVimWindow;
159 static VALUE eDeletedBufferError;
160 static VALUE eDeletedWindowError;
161 
162 static int ensure_ruby_initialized(void);
163 static void error_print(int);
164 static void ruby_io_init(void);
165 static void ruby_vim_init(void);
166 
167 #if defined(RUBY19_OR_LATER) || defined(RUBY_INIT_STACK)
168 # if defined(__ia64) && !defined(ruby_init_stack)
169 #  define ruby_init_stack(addr) ruby_init_stack((addr), rb_ia64_bsp())
170 # endif
171 #endif
172 
173 #if defined(DYNAMIC_RUBY) || defined(PROTO)
174 # ifdef PROTO
175 #  define HINSTANCE int		/* for generating prototypes */
176 # endif
177 
178 /*
179  * Wrapper defines
180  */
181 # define rb_assoc_new			dll_rb_assoc_new
182 # define rb_cObject			(*dll_rb_cObject)
183 # define rb_check_type			dll_rb_check_type
184 # define rb_class_path			dll_rb_class_path
185 # define rb_data_object_alloc		dll_rb_data_object_alloc
186 # define rb_define_class_under		dll_rb_define_class_under
187 # define rb_define_const			dll_rb_define_const
188 # define rb_define_global_function	dll_rb_define_global_function
189 # define rb_define_method		dll_rb_define_method
190 # define rb_define_module		dll_rb_define_module
191 # define rb_define_module_function	dll_rb_define_module_function
192 # define rb_define_singleton_method	dll_rb_define_singleton_method
193 # define rb_define_virtual_variable	dll_rb_define_virtual_variable
194 # define rb_stdout			(*dll_rb_stdout)
195 # define rb_eArgError			(*dll_rb_eArgError)
196 # define rb_eIndexError			(*dll_rb_eIndexError)
197 # define rb_eRuntimeError		(*dll_rb_eRuntimeError)
198 # define rb_eStandardError		(*dll_rb_eStandardError)
199 # define rb_eval_string_protect		dll_rb_eval_string_protect
200 # define rb_global_variable		dll_rb_global_variable
201 # define rb_hash_aset			dll_rb_hash_aset
202 # define rb_hash_new			dll_rb_hash_new
203 # define rb_inspect			dll_rb_inspect
204 # define rb_int2inum			dll_rb_int2inum
205 # if VIM_SIZEOF_INT < VIM_SIZEOF_LONG /* 64 bits only */
206 #  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER <= 18
207 #   define rb_fix2int			dll_rb_fix2int
208 #   define rb_num2int			dll_rb_num2int
209 #  endif
210 #  define rb_num2uint			dll_rb_num2uint
211 # endif
212 # define rb_lastline_get			dll_rb_lastline_get
213 # define rb_lastline_set			dll_rb_lastline_set
214 # define rb_load_protect			dll_rb_load_protect
215 # ifndef RUBY19_OR_LATER
216 #  define rb_num2long			dll_rb_num2long
217 # endif
218 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER <= 19
219 #  define rb_num2ulong			dll_rb_num2ulong
220 # endif
221 # define rb_obj_alloc			dll_rb_obj_alloc
222 # define rb_obj_as_string		dll_rb_obj_as_string
223 # define rb_obj_id			dll_rb_obj_id
224 # define rb_raise			dll_rb_raise
225 # define rb_str_cat			dll_rb_str_cat
226 # define rb_str_concat			dll_rb_str_concat
227 # define rb_str_new			dll_rb_str_new
228 # ifdef rb_str_new2
229 /* Ruby may #define rb_str_new2 to use rb_str_new_cstr. */
230 #  define need_rb_str_new_cstr 1
231 /* Ruby's headers #define rb_str_new_cstr to make use of GCC's
232  * __builtin_constant_p extension. */
233 #  undef rb_str_new_cstr
234 #  define rb_str_new_cstr		dll_rb_str_new_cstr
235 # else
236 #  define rb_str_new2			dll_rb_str_new2
237 # endif
238 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
239 #  define rb_string_value		dll_rb_string_value
240 #  define rb_string_value_ptr		dll_rb_string_value_ptr
241 #  define rb_float_new			dll_rb_float_new
242 #  define rb_ary_new			dll_rb_ary_new
243 #  define rb_ary_push			dll_rb_ary_push
244 #  if defined(RUBY19_OR_LATER) || defined(RUBY_INIT_STACK)
245 #   ifdef __ia64
246 #    define rb_ia64_bsp			dll_rb_ia64_bsp
247 #    undef ruby_init_stack
248 #    define ruby_init_stack(addr)	dll_ruby_init_stack((addr), rb_ia64_bsp())
249 #   else
250 #    define ruby_init_stack		dll_ruby_init_stack
251 #   endif
252 #  endif
253 # else
254 #  define rb_str2cstr			dll_rb_str2cstr
255 # endif
256 # ifdef RUBY19_OR_LATER
257 #  define rb_errinfo			dll_rb_errinfo
258 # else
259 #  define ruby_errinfo			(*dll_ruby_errinfo)
260 # endif
261 # define ruby_init			dll_ruby_init
262 # define ruby_init_loadpath		dll_ruby_init_loadpath
263 # ifdef WIN3264
264 #  define NtInitialize			dll_NtInitialize
265 #  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
266 #   define rb_w32_snprintf		dll_rb_w32_snprintf
267 #  endif
268 # endif
269 
270 # ifdef RUBY19_OR_LATER
271 #  define ruby_script			dll_ruby_script
272 #  define rb_enc_find_index		dll_rb_enc_find_index
273 #  define rb_enc_find			dll_rb_enc_find
274 #  define rb_enc_str_new			dll_rb_enc_str_new
275 #  define rb_sprintf			dll_rb_sprintf
276 #  define rb_require			dll_rb_require
277 #  define ruby_process_options		dll_ruby_process_options
278 # endif
279 
280 /*
281  * Pointers for dynamic link
282  */
283 static VALUE (*dll_rb_assoc_new) (VALUE, VALUE);
284 VALUE *dll_rb_cFalseClass;
285 VALUE *dll_rb_cFixnum;
286 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 20
287 VALUE *dll_rb_cFloat;
288 # endif
289 VALUE *dll_rb_cNilClass;
290 static VALUE *dll_rb_cObject;
291 VALUE *dll_rb_cSymbol;
292 VALUE *dll_rb_cTrueClass;
293 static void (*dll_rb_check_type) (VALUE,int);
294 static VALUE (*dll_rb_class_path) (VALUE);
295 static VALUE (*dll_rb_data_object_alloc) (VALUE, void*, RUBY_DATA_FUNC, RUBY_DATA_FUNC);
296 static VALUE (*dll_rb_define_class_under) (VALUE, const char*, VALUE);
297 static void (*dll_rb_define_const) (VALUE,const char*,VALUE);
298 static void (*dll_rb_define_global_function) (const char*,VALUE(*)(),int);
299 static void (*dll_rb_define_method) (VALUE,const char*,VALUE(*)(),int);
300 static VALUE (*dll_rb_define_module) (const char*);
301 static void (*dll_rb_define_module_function) (VALUE,const char*,VALUE(*)(),int);
302 static void (*dll_rb_define_singleton_method) (VALUE,const char*,VALUE(*)(),int);
303 static void (*dll_rb_define_virtual_variable) (const char*,VALUE(*)(),void(*)());
304 static VALUE *dll_rb_stdout;
305 static VALUE *dll_rb_eArgError;
306 static VALUE *dll_rb_eIndexError;
307 static VALUE *dll_rb_eRuntimeError;
308 static VALUE *dll_rb_eStandardError;
309 static VALUE (*dll_rb_eval_string_protect) (const char*, int*);
310 static void (*dll_rb_global_variable) (VALUE*);
311 static VALUE (*dll_rb_hash_aset) (VALUE, VALUE, VALUE);
312 static VALUE (*dll_rb_hash_new) (void);
313 static VALUE (*dll_rb_inspect) (VALUE);
314 static VALUE (*dll_rb_int2inum) (long);
315 # if VIM_SIZEOF_INT < VIM_SIZEOF_LONG /* 64 bits only */
316 static long (*dll_rb_fix2int) (VALUE);
317 static long (*dll_rb_num2int) (VALUE);
318 static unsigned long (*dll_rb_num2uint) (VALUE);
319 # endif
320 static VALUE (*dll_rb_lastline_get) (void);
321 static void (*dll_rb_lastline_set) (VALUE);
322 static void (*dll_rb_load_protect) (VALUE, int, int*);
323 static long (*dll_rb_num2long) (VALUE);
324 static unsigned long (*dll_rb_num2ulong) (VALUE);
325 static VALUE (*dll_rb_obj_alloc) (VALUE);
326 static VALUE (*dll_rb_obj_as_string) (VALUE);
327 static VALUE (*dll_rb_obj_id) (VALUE);
328 static void (*dll_rb_raise) (VALUE, const char*, ...);
329 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
330 static VALUE (*dll_rb_string_value) (volatile VALUE*);
331 # else
332 static char *(*dll_rb_str2cstr) (VALUE,int*);
333 # endif
334 static VALUE (*dll_rb_str_cat) (VALUE, const char*, long);
335 static VALUE (*dll_rb_str_concat) (VALUE, VALUE);
336 static VALUE (*dll_rb_str_new) (const char*, long);
337 # ifdef need_rb_str_new_cstr
338 /* Ruby may #define rb_str_new2 to use rb_str_new_cstr. */
339 static VALUE (*dll_rb_str_new_cstr) (const char*);
340 # else
341 static VALUE (*dll_rb_str_new2) (const char*);
342 # endif
343 # ifdef RUBY19_OR_LATER
344 static VALUE (*dll_rb_errinfo) (void);
345 # else
346 static VALUE *dll_ruby_errinfo;
347 # endif
348 static void (*dll_ruby_init) (void);
349 static void (*dll_ruby_init_loadpath) (void);
350 # ifdef WIN3264
351 static void (*dll_NtInitialize) (int*, char***);
352 #  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
353 static int (*dll_rb_w32_snprintf)(char*, size_t, const char*, ...);
354 #  endif
355 # endif
356 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
357 static char * (*dll_rb_string_value_ptr) (volatile VALUE*);
358 static VALUE (*dll_rb_float_new) (double);
359 static VALUE (*dll_rb_ary_new) (void);
360 static VALUE (*dll_rb_ary_push) (VALUE, VALUE);
361 #  if defined(RUBY19_OR_LATER) || defined(RUBY_INIT_STACK)
362 #   ifdef __ia64
363 static void * (*dll_rb_ia64_bsp) (void);
364 static void (*dll_ruby_init_stack)(VALUE*, void*);
365 #   else
366 static void (*dll_ruby_init_stack)(VALUE*);
367 #   endif
368 #  endif
369 # endif
370 # ifdef RUBY19_OR_LATER
371 static VALUE (*dll_rb_int2big)(SIGNED_VALUE);
372 # endif
373 
374 # ifdef RUBY19_OR_LATER
375 static void (*dll_ruby_script) (const char*);
376 static int (*dll_rb_enc_find_index) (const char*);
377 static rb_encoding* (*dll_rb_enc_find) (const char*);
378 static VALUE (*dll_rb_enc_str_new) (const char*, long, rb_encoding*);
379 static VALUE (*dll_rb_sprintf) (const char*, ...);
380 static VALUE (*dll_rb_require) (const char*);
381 static void* (*ruby_process_options)(int, char**);
382 # endif
383 
384 # if defined(USE_RGENGC) && USE_RGENGC
385 static void (*dll_rb_gc_writebarrier_unprotect_promoted)(VALUE);
386 # endif
387 
388 # if defined(RUBY19_OR_LATER) && !defined(PROTO)
389 SIGNED_VALUE rb_num2long_stub(VALUE x)
390 {
391     return dll_rb_num2long(x);
392 }
393 VALUE rb_int2big_stub(SIGNED_VALUE x)
394 {
395     return dll_rb_int2big(x);
396 }
397 #  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 19 \
398 	&& VIM_SIZEOF_INT < VIM_SIZEOF_LONG
399 long rb_fix2int_stub(VALUE x)
400 {
401     return dll_rb_fix2int(x);
402 }
403 long rb_num2int_stub(VALUE x)
404 {
405     return dll_rb_num2int(x);
406 }
407 #  endif
408 #  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 20
409 VALUE
410 rb_float_new_in_heap(double d)
411 {
412     return dll_rb_float_new(d);
413 }
414 VALUE rb_num2ulong(VALUE x)
415 {
416     return (long)RSHIFT((SIGNED_VALUE)(x),1);
417 }
418 #  endif
419 # endif
420 
421 # if defined(USE_RGENGC) && USE_RGENGC
422 void rb_gc_writebarrier_unprotect_promoted_stub(VALUE obj)
423 {
424     return dll_rb_gc_writebarrier_unprotect_promoted(obj);
425 }
426 # endif
427 
428 static HINSTANCE hinstRuby = NULL; /* Instance of ruby.dll */
429 
430 /*
431  * Table of name to function pointer of ruby.
432  */
433 static struct
434 {
435     char *name;
436     RUBY_PROC *ptr;
437 } ruby_funcname_table[] =
438 {
439     {"rb_assoc_new", (RUBY_PROC*)&dll_rb_assoc_new},
440     {"rb_cFalseClass", (RUBY_PROC*)&dll_rb_cFalseClass},
441     {"rb_cFixnum", (RUBY_PROC*)&dll_rb_cFixnum},
442 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 20
443     {"rb_cFloat", (RUBY_PROC*)&dll_rb_cFloat},
444 # endif
445     {"rb_cNilClass", (RUBY_PROC*)&dll_rb_cNilClass},
446     {"rb_cObject", (RUBY_PROC*)&dll_rb_cObject},
447     {"rb_cSymbol", (RUBY_PROC*)&dll_rb_cSymbol},
448     {"rb_cTrueClass", (RUBY_PROC*)&dll_rb_cTrueClass},
449     {"rb_check_type", (RUBY_PROC*)&dll_rb_check_type},
450     {"rb_class_path", (RUBY_PROC*)&dll_rb_class_path},
451     {"rb_data_object_alloc", (RUBY_PROC*)&dll_rb_data_object_alloc},
452     {"rb_define_class_under", (RUBY_PROC*)&dll_rb_define_class_under},
453     {"rb_define_const", (RUBY_PROC*)&dll_rb_define_const},
454     {"rb_define_global_function", (RUBY_PROC*)&dll_rb_define_global_function},
455     {"rb_define_method", (RUBY_PROC*)&dll_rb_define_method},
456     {"rb_define_module", (RUBY_PROC*)&dll_rb_define_module},
457     {"rb_define_module_function", (RUBY_PROC*)&dll_rb_define_module_function},
458     {"rb_define_singleton_method", (RUBY_PROC*)&dll_rb_define_singleton_method},
459     {"rb_define_virtual_variable", (RUBY_PROC*)&dll_rb_define_virtual_variable},
460     {"rb_stdout", (RUBY_PROC*)&dll_rb_stdout},
461     {"rb_eArgError", (RUBY_PROC*)&dll_rb_eArgError},
462     {"rb_eIndexError", (RUBY_PROC*)&dll_rb_eIndexError},
463     {"rb_eRuntimeError", (RUBY_PROC*)&dll_rb_eRuntimeError},
464     {"rb_eStandardError", (RUBY_PROC*)&dll_rb_eStandardError},
465     {"rb_eval_string_protect", (RUBY_PROC*)&dll_rb_eval_string_protect},
466     {"rb_global_variable", (RUBY_PROC*)&dll_rb_global_variable},
467     {"rb_hash_aset", (RUBY_PROC*)&dll_rb_hash_aset},
468     {"rb_hash_new", (RUBY_PROC*)&dll_rb_hash_new},
469     {"rb_inspect", (RUBY_PROC*)&dll_rb_inspect},
470     {"rb_int2inum", (RUBY_PROC*)&dll_rb_int2inum},
471 # if VIM_SIZEOF_INT < VIM_SIZEOF_LONG /* 64 bits only */
472     {"rb_fix2int", (RUBY_PROC*)&dll_rb_fix2int},
473     {"rb_num2int", (RUBY_PROC*)&dll_rb_num2int},
474     {"rb_num2uint", (RUBY_PROC*)&dll_rb_num2uint},
475 # endif
476     {"rb_lastline_get", (RUBY_PROC*)&dll_rb_lastline_get},
477     {"rb_lastline_set", (RUBY_PROC*)&dll_rb_lastline_set},
478     {"rb_load_protect", (RUBY_PROC*)&dll_rb_load_protect},
479     {"rb_num2long", (RUBY_PROC*)&dll_rb_num2long},
480     {"rb_num2ulong", (RUBY_PROC*)&dll_rb_num2ulong},
481     {"rb_obj_alloc", (RUBY_PROC*)&dll_rb_obj_alloc},
482     {"rb_obj_as_string", (RUBY_PROC*)&dll_rb_obj_as_string},
483     {"rb_obj_id", (RUBY_PROC*)&dll_rb_obj_id},
484     {"rb_raise", (RUBY_PROC*)&dll_rb_raise},
485 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
486     {"rb_string_value", (RUBY_PROC*)&dll_rb_string_value},
487 # else
488     {"rb_str2cstr", (RUBY_PROC*)&dll_rb_str2cstr},
489 # endif
490     {"rb_str_cat", (RUBY_PROC*)&dll_rb_str_cat},
491     {"rb_str_concat", (RUBY_PROC*)&dll_rb_str_concat},
492     {"rb_str_new", (RUBY_PROC*)&dll_rb_str_new},
493 # ifdef need_rb_str_new_cstr
494     {"rb_str_new_cstr", (RUBY_PROC*)&dll_rb_str_new_cstr},
495 # else
496     {"rb_str_new2", (RUBY_PROC*)&dll_rb_str_new2},
497 # endif
498 # ifdef RUBY19_OR_LATER
499     {"rb_errinfo", (RUBY_PROC*)&dll_rb_errinfo},
500 # else
501     {"ruby_errinfo", (RUBY_PROC*)&dll_ruby_errinfo},
502 # endif
503     {"ruby_init", (RUBY_PROC*)&dll_ruby_init},
504     {"ruby_init_loadpath", (RUBY_PROC*)&dll_ruby_init_loadpath},
505 # ifdef WIN3264
506     {
507 #  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER < 19
508     "NtInitialize",
509 #  else
510     "ruby_sysinit",
511 #  endif
512 			(RUBY_PROC*)&dll_NtInitialize},
513 #  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
514     {"rb_w32_snprintf", (RUBY_PROC*)&dll_rb_w32_snprintf},
515 #  endif
516 # endif
517 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
518     {"rb_string_value_ptr", (RUBY_PROC*)&dll_rb_string_value_ptr},
519 #  if DYNAMIC_RUBY_VER <= 19
520     {"rb_float_new", (RUBY_PROC*)&dll_rb_float_new},
521 #  else
522     {"rb_float_new_in_heap", (RUBY_PROC*)&dll_rb_float_new},
523 #  endif
524     {"rb_ary_new", (RUBY_PROC*)&dll_rb_ary_new},
525     {"rb_ary_push", (RUBY_PROC*)&dll_rb_ary_push},
526 # endif
527 # ifdef RUBY19_OR_LATER
528     {"rb_int2big", (RUBY_PROC*)&dll_rb_int2big},
529     {"ruby_script", (RUBY_PROC*)&dll_ruby_script},
530     {"rb_enc_find_index", (RUBY_PROC*)&dll_rb_enc_find_index},
531     {"rb_enc_find", (RUBY_PROC*)&dll_rb_enc_find},
532     {"rb_enc_str_new", (RUBY_PROC*)&dll_rb_enc_str_new},
533     {"rb_sprintf", (RUBY_PROC*)&dll_rb_sprintf},
534     {"rb_require", (RUBY_PROC*)&dll_rb_require},
535     {"ruby_process_options", (RUBY_PROC*)&dll_ruby_process_options},
536 # endif
537 # if defined(RUBY19_OR_LATER) || defined(RUBY_INIT_STACK)
538 #  ifdef __ia64
539     {"rb_ia64_bsp", (RUBY_PROC*)&dll_rb_ia64_bsp},
540 #  endif
541     {"ruby_init_stack", (RUBY_PROC*)&dll_ruby_init_stack},
542 # endif
543 # if defined(USE_RGENGC) && USE_RGENGC
544     {"rb_gc_writebarrier_unprotect_promoted", (RUBY_PROC*)&dll_rb_gc_writebarrier_unprotect_promoted},
545 # endif
546     {"", NULL},
547 };
548 
549 /*
550  * Free ruby.dll
551  */
552     static void
553 end_dynamic_ruby()
554 {
555     if (hinstRuby)
556     {
557 	close_dll(hinstRuby);
558 	hinstRuby = NULL;
559     }
560 }
561 
562 /*
563  * Load library and get all pointers.
564  * Parameter 'libname' provides name of DLL.
565  * Return OK or FAIL.
566  */
567     static int
568 ruby_runtime_link_init(char *libname, int verbose)
569 {
570     int i;
571 
572     if (hinstRuby)
573 	return OK;
574     hinstRuby = load_dll(libname);
575     if (!hinstRuby)
576     {
577 	if (verbose)
578 	    EMSG2(_(e_loadlib), libname);
579 	return FAIL;
580     }
581 
582     for (i = 0; ruby_funcname_table[i].ptr; ++i)
583     {
584 	if (!(*ruby_funcname_table[i].ptr = symbol_from_dll(hinstRuby,
585 			ruby_funcname_table[i].name)))
586 	{
587 	    close_dll(hinstRuby);
588 	    hinstRuby = NULL;
589 	    if (verbose)
590 		EMSG2(_(e_loadfunc), ruby_funcname_table[i].name);
591 	    return FAIL;
592 	}
593     }
594     return OK;
595 }
596 
597 /*
598  * If ruby is enabled (there is installed ruby on Windows system) return TRUE,
599  * else FALSE.
600  */
601     int
602 ruby_enabled(verbose)
603     int		verbose;
604 {
605     return ruby_runtime_link_init(DYNAMIC_RUBY_DLL, verbose) == OK;
606 }
607 #endif /* defined(DYNAMIC_RUBY) || defined(PROTO) */
608 
609     void
610 ruby_end()
611 {
612 #ifdef DYNAMIC_RUBY
613     end_dynamic_ruby();
614 #endif
615 }
616 
617 void ex_ruby(exarg_T *eap)
618 {
619     int state;
620     char *script = NULL;
621 
622     script = (char *)script_get(eap, eap->arg);
623     if (!eap->skip && ensure_ruby_initialized())
624     {
625 	if (script == NULL)
626 	    rb_eval_string_protect((char *)eap->arg, &state);
627 	else
628 	    rb_eval_string_protect(script, &state);
629 	if (state)
630 	    error_print(state);
631     }
632     vim_free(script);
633 }
634 
635 /*
636  *  In Ruby 1.9 or later, ruby String object has encoding.
637  *  conversion buffer string of vim to ruby String object using
638  *  VIM encoding option.
639  */
640     static VALUE
641 vim_str2rb_enc_str(const char *s)
642 {
643 #ifdef RUBY19_OR_LATER
644     int isnum;
645     long lval;
646     char_u *sval;
647     rb_encoding *enc;
648 
649     isnum = get_option_value((char_u *)"enc", &lval, &sval, 0);
650     if (isnum == 0)
651     {
652 	enc = rb_enc_find((char *)sval);
653 	vim_free(sval);
654 	if (enc) {
655 	    return rb_enc_str_new(s, strlen(s), enc);
656 	}
657     }
658 #endif
659     return rb_str_new2(s);
660 }
661 
662     static VALUE
663 eval_enc_string_protect(const char *str, int *state)
664 {
665 #ifdef RUBY19_OR_LATER
666     int isnum;
667     long lval;
668     char_u *sval;
669     rb_encoding *enc;
670     VALUE v;
671 
672     isnum = get_option_value((char_u *)"enc", &lval, &sval, 0);
673     if (isnum == 0)
674     {
675 	enc = rb_enc_find((char *)sval);
676 	vim_free(sval);
677 	if (enc)
678 	{
679 	    v = rb_sprintf("#-*- coding:%s -*-\n%s", rb_enc_name(enc), str);
680 	    return rb_eval_string_protect(StringValuePtr(v), state);
681 	}
682     }
683 #endif
684     return rb_eval_string_protect(str, state);
685 }
686 
687 void ex_rubydo(exarg_T *eap)
688 {
689     int state;
690     linenr_T i;
691 
692     if (ensure_ruby_initialized())
693     {
694 	if (u_save(eap->line1 - 1, eap->line2 + 1) != OK)
695 	    return;
696 	for (i = eap->line1; i <= eap->line2; i++) {
697 	    VALUE line;
698 
699 	    line = vim_str2rb_enc_str((char *)ml_get(i));
700 	    rb_lastline_set(line);
701 	    eval_enc_string_protect((char *) eap->arg, &state);
702 	    if (state) {
703 		error_print(state);
704 		break;
705 	    }
706 	    line = rb_lastline_get();
707 	    if (!NIL_P(line)) {
708 		if (TYPE(line) != T_STRING) {
709 		    EMSG(_("E265: $_ must be an instance of String"));
710 		    return;
711 		}
712 		ml_replace(i, (char_u *) StringValuePtr(line), 1);
713 		changed();
714 #ifdef SYNTAX_HL
715 		syn_changed(i); /* recompute syntax hl. for this line */
716 #endif
717 	    }
718 	}
719 	check_cursor();
720 	update_curbuf(NOT_VALID);
721     }
722 }
723 
724 void ex_rubyfile(exarg_T *eap)
725 {
726     int state;
727 
728     if (ensure_ruby_initialized())
729     {
730 	rb_load_protect(rb_str_new2((char *) eap->arg), 0, &state);
731 	if (state) error_print(state);
732     }
733 }
734 
735 void ruby_buffer_free(buf_T *buf)
736 {
737     if (buf->b_ruby_ref)
738     {
739 	rb_hash_aset(objtbl, rb_obj_id((VALUE) buf->b_ruby_ref), Qnil);
740 	RDATA(buf->b_ruby_ref)->data = NULL;
741     }
742 }
743 
744 void ruby_window_free(win_T *win)
745 {
746     if (win->w_ruby_ref)
747     {
748 	rb_hash_aset(objtbl, rb_obj_id((VALUE) win->w_ruby_ref), Qnil);
749 	RDATA(win->w_ruby_ref)->data = NULL;
750     }
751 }
752 
753 static int ensure_ruby_initialized(void)
754 {
755     if (!ruby_initialized)
756     {
757 #ifdef DYNAMIC_RUBY
758 	if (ruby_enabled(TRUE))
759 	{
760 #endif
761 #ifdef _WIN32
762 	    /* suggested by Ariya Mizutani */
763 	    int argc = 1;
764 	    char *argv[] = {"gvim.exe"};
765 	    NtInitialize(&argc, &argv);
766 #endif
767 	    {
768 #if defined(RUBY19_OR_LATER) || defined(RUBY_INIT_STACK)
769 		ruby_init_stack(ruby_stack_start);
770 #endif
771 		ruby_init();
772 	    }
773 #ifdef RUBY19_OR_LATER
774 	    {
775 		int dummy_argc = 2;
776 		char *dummy_argv[] = {"vim-ruby", "-e0"};
777 		ruby_process_options(dummy_argc, dummy_argv);
778 	    }
779 	    ruby_script("vim-ruby");
780 #else
781 	    ruby_init_loadpath();
782 #endif
783 	    ruby_io_init();
784 	    ruby_vim_init();
785 	    ruby_initialized = 1;
786 #ifdef DYNAMIC_RUBY
787 	}
788 	else
789 	{
790 	    EMSG(_("E266: Sorry, this command is disabled, the Ruby library could not be loaded."));
791 	    return 0;
792 	}
793 #endif
794     }
795     return ruby_initialized;
796 }
797 
798 static void error_print(int state)
799 {
800 #ifndef DYNAMIC_RUBY
801 #if !(defined(RUBY_VERSION) && RUBY_VERSION >= 19) \
802     && !(defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 19)
803     RUBYEXTERN VALUE ruby_errinfo;
804 #endif
805 #endif
806     VALUE eclass;
807     VALUE einfo;
808     char buff[BUFSIZ];
809 
810 #define TAG_RETURN	0x1
811 #define TAG_BREAK	0x2
812 #define TAG_NEXT	0x3
813 #define TAG_RETRY	0x4
814 #define TAG_REDO	0x5
815 #define TAG_RAISE	0x6
816 #define TAG_THROW	0x7
817 #define TAG_FATAL	0x8
818 #define TAG_MASK	0xf
819 
820     switch (state) {
821     case TAG_RETURN:
822 	EMSG(_("E267: unexpected return"));
823 	break;
824     case TAG_NEXT:
825 	EMSG(_("E268: unexpected next"));
826 	break;
827     case TAG_BREAK:
828 	EMSG(_("E269: unexpected break"));
829 	break;
830     case TAG_REDO:
831 	EMSG(_("E270: unexpected redo"));
832 	break;
833     case TAG_RETRY:
834 	EMSG(_("E271: retry outside of rescue clause"));
835 	break;
836     case TAG_RAISE:
837     case TAG_FATAL:
838 #ifdef RUBY19_OR_LATER
839 	eclass = CLASS_OF(rb_errinfo());
840 	einfo = rb_obj_as_string(rb_errinfo());
841 #else
842 	eclass = CLASS_OF(ruby_errinfo);
843 	einfo = rb_obj_as_string(ruby_errinfo);
844 #endif
845 	if (eclass == rb_eRuntimeError && RSTRING_LEN(einfo) == 0) {
846 	    EMSG(_("E272: unhandled exception"));
847 	}
848 	else {
849 	    VALUE epath;
850 	    char *p;
851 
852 	    epath = rb_class_path(eclass);
853 	    vim_snprintf(buff, BUFSIZ, "%s: %s",
854 		     RSTRING_PTR(epath), RSTRING_PTR(einfo));
855 	    p = strchr(buff, '\n');
856 	    if (p) *p = '\0';
857 	    EMSG(buff);
858 	}
859 	break;
860     default:
861 	vim_snprintf(buff, BUFSIZ, _("E273: unknown longjmp status %d"), state);
862 	EMSG(buff);
863 	break;
864     }
865 }
866 
867 static VALUE vim_message(VALUE self UNUSED, VALUE str)
868 {
869     char *buff, *p;
870 
871     str = rb_obj_as_string(str);
872     if (RSTRING_LEN(str) > 0)
873     {
874 	/* Only do this when the string isn't empty, alloc(0) causes trouble. */
875 	buff = ALLOCA_N(char, RSTRING_LEN(str));
876 	strcpy(buff, RSTRING_PTR(str));
877 	p = strchr(buff, '\n');
878 	if (p) *p = '\0';
879 	MSG(buff);
880     }
881     else
882     {
883 	MSG("");
884     }
885     return Qnil;
886 }
887 
888 static VALUE vim_set_option(VALUE self UNUSED, VALUE str)
889 {
890     do_set((char_u *)StringValuePtr(str), 0);
891     update_screen(NOT_VALID);
892     return Qnil;
893 }
894 
895 static VALUE vim_command(VALUE self UNUSED, VALUE str)
896 {
897     do_cmdline_cmd((char_u *)StringValuePtr(str));
898     return Qnil;
899 }
900 
901 #ifdef FEAT_EVAL
902 static VALUE vim_to_ruby(typval_T *tv)
903 {
904     VALUE result = Qnil;
905 
906     if (tv->v_type == VAR_STRING)
907     {
908 	result = rb_str_new2(tv->vval.v_string == NULL
909 					  ? "" : (char *)(tv->vval.v_string));
910     }
911     else if (tv->v_type == VAR_NUMBER)
912     {
913 	result = INT2NUM(tv->vval.v_number);
914     }
915 # ifdef FEAT_FLOAT
916     else if (tv->v_type == VAR_FLOAT)
917     {
918 	result = rb_float_new(tv->vval.v_float);
919     }
920 # endif
921     else if (tv->v_type == VAR_LIST)
922     {
923 	list_T      *list = tv->vval.v_list;
924 	listitem_T  *curr;
925 
926 	result = rb_ary_new();
927 
928 	if (list != NULL)
929 	{
930 	    for (curr = list->lv_first; curr != NULL; curr = curr->li_next)
931 	    {
932 		rb_ary_push(result, vim_to_ruby(&curr->li_tv));
933 	    }
934 	}
935     }
936     else if (tv->v_type == VAR_DICT)
937     {
938 	result = rb_hash_new();
939 
940 	if (tv->vval.v_dict != NULL)
941 	{
942 	    hashtab_T   *ht = &tv->vval.v_dict->dv_hashtab;
943 	    long_u      todo = ht->ht_used;
944 	    hashitem_T  *hi;
945 	    dictitem_T  *di;
946 
947 	    for (hi = ht->ht_array; todo > 0; ++hi)
948 	    {
949 		if (!HASHITEM_EMPTY(hi))
950 		{
951 		    --todo;
952 
953 		    di = dict_lookup(hi);
954 		    rb_hash_aset(result, rb_str_new2((char *)hi->hi_key),
955 						     vim_to_ruby(&di->di_tv));
956 		}
957 	    }
958 	}
959     } /* else return Qnil; */
960 
961     return result;
962 }
963 #endif
964 
965 static VALUE vim_evaluate(VALUE self UNUSED, VALUE str)
966 {
967 #ifdef FEAT_EVAL
968     typval_T    *tv;
969     VALUE       result;
970 
971     tv = eval_expr((char_u *)StringValuePtr(str), NULL);
972     if (tv == NULL)
973     {
974 	return Qnil;
975     }
976     result = vim_to_ruby(tv);
977 
978     free_tv(tv);
979 
980     return result;
981 #else
982     return Qnil;
983 #endif
984 }
985 
986 static VALUE buffer_new(buf_T *buf)
987 {
988     if (buf->b_ruby_ref)
989     {
990 	return (VALUE) buf->b_ruby_ref;
991     }
992     else
993     {
994 	VALUE obj = Data_Wrap_Struct(cBuffer, 0, 0, buf);
995 	buf->b_ruby_ref = (void *) obj;
996 	rb_hash_aset(objtbl, rb_obj_id(obj), obj);
997 	return obj;
998     }
999 }
1000 
1001 static buf_T *get_buf(VALUE obj)
1002 {
1003     buf_T *buf;
1004 
1005     Data_Get_Struct(obj, buf_T, buf);
1006     if (buf == NULL)
1007 	rb_raise(eDeletedBufferError, "attempt to refer to deleted buffer");
1008     return buf;
1009 }
1010 
1011 static VALUE buffer_s_current()
1012 {
1013     return buffer_new(curbuf);
1014 }
1015 
1016 static VALUE buffer_s_count()
1017 {
1018     buf_T *b;
1019     int n = 0;
1020 
1021     for (b = firstbuf; b != NULL; b = b->b_next)
1022     {
1023 	/*  Deleted buffers should not be counted
1024 	 *    SegPhault - 01/07/05 */
1025 	if (b->b_p_bl)
1026 	    n++;
1027     }
1028 
1029     return INT2NUM(n);
1030 }
1031 
1032 static VALUE buffer_s_aref(VALUE self UNUSED, VALUE num)
1033 {
1034     buf_T *b;
1035     int n = NUM2INT(num);
1036 
1037     for (b = firstbuf; b != NULL; b = b->b_next)
1038     {
1039 	/*  Deleted buffers should not be counted
1040 	 *    SegPhault - 01/07/05 */
1041 	if (!b->b_p_bl)
1042 	    continue;
1043 
1044 	if (n == 0)
1045 	    return buffer_new(b);
1046 
1047 	n--;
1048     }
1049     return Qnil;
1050 }
1051 
1052 static VALUE buffer_name(VALUE self)
1053 {
1054     buf_T *buf = get_buf(self);
1055 
1056     return buf->b_ffname ? rb_str_new2((char *)buf->b_ffname) : Qnil;
1057 }
1058 
1059 static VALUE buffer_number(VALUE self)
1060 {
1061     buf_T *buf = get_buf(self);
1062 
1063     return INT2NUM(buf->b_fnum);
1064 }
1065 
1066 static VALUE buffer_count(VALUE self)
1067 {
1068     buf_T *buf = get_buf(self);
1069 
1070     return INT2NUM(buf->b_ml.ml_line_count);
1071 }
1072 
1073 static VALUE get_buffer_line(buf_T *buf, linenr_T n)
1074 {
1075     if (n <= 0 || n > buf->b_ml.ml_line_count)
1076 	rb_raise(rb_eIndexError, "line number %ld out of range", (long)n);
1077     return vim_str2rb_enc_str((char *)ml_get_buf(buf, n, FALSE));
1078 }
1079 
1080 static VALUE buffer_aref(VALUE self, VALUE num)
1081 {
1082     buf_T *buf = get_buf(self);
1083 
1084     if (buf != NULL)
1085 	return get_buffer_line(buf, (linenr_T)NUM2LONG(num));
1086     return Qnil; /* For stop warning */
1087 }
1088 
1089 static VALUE set_buffer_line(buf_T *buf, linenr_T n, VALUE str)
1090 {
1091     char	*line = StringValuePtr(str);
1092     aco_save_T	aco;
1093 
1094     if (n > 0 && n <= buf->b_ml.ml_line_count && line != NULL)
1095     {
1096 	/* set curwin/curbuf for "buf" and save some things */
1097 	aucmd_prepbuf(&aco, buf);
1098 
1099 	if (u_savesub(n) == OK) {
1100 	    ml_replace(n, (char_u *)line, TRUE);
1101 	    changed();
1102 #ifdef SYNTAX_HL
1103 	    syn_changed(n); /* recompute syntax hl. for this line */
1104 #endif
1105 	}
1106 
1107 	/* restore curwin/curbuf and a few other things */
1108 	aucmd_restbuf(&aco);
1109 	/* Careful: autocommands may have made "buf" invalid! */
1110 
1111 	update_curbuf(NOT_VALID);
1112     }
1113     else
1114     {
1115 	rb_raise(rb_eIndexError, "line number %ld out of range", (long)n);
1116     }
1117     return str;
1118 }
1119 
1120 static VALUE buffer_aset(VALUE self, VALUE num, VALUE str)
1121 {
1122     buf_T *buf = get_buf(self);
1123 
1124     if (buf != NULL)
1125 	return set_buffer_line(buf, (linenr_T)NUM2LONG(num), str);
1126     return str;
1127 }
1128 
1129 static VALUE buffer_delete(VALUE self, VALUE num)
1130 {
1131     buf_T	*buf = get_buf(self);
1132     long	n = NUM2LONG(num);
1133     aco_save_T	aco;
1134 
1135     if (n > 0 && n <= buf->b_ml.ml_line_count)
1136     {
1137 	/* set curwin/curbuf for "buf" and save some things */
1138 	aucmd_prepbuf(&aco, buf);
1139 
1140 	if (u_savedel(n, 1) == OK) {
1141 	    ml_delete(n, 0);
1142 
1143 	    /* Changes to non-active buffers should properly refresh
1144 	     *   SegPhault - 01/09/05 */
1145 	    deleted_lines_mark(n, 1L);
1146 
1147 	    changed();
1148 	}
1149 
1150 	/* restore curwin/curbuf and a few other things */
1151 	aucmd_restbuf(&aco);
1152 	/* Careful: autocommands may have made "buf" invalid! */
1153 
1154 	update_curbuf(NOT_VALID);
1155     }
1156     else
1157     {
1158 	rb_raise(rb_eIndexError, "line number %ld out of range", n);
1159     }
1160     return Qnil;
1161 }
1162 
1163 static VALUE buffer_append(VALUE self, VALUE num, VALUE str)
1164 {
1165     buf_T	*buf = get_buf(self);
1166     char	*line = StringValuePtr(str);
1167     long	n = NUM2LONG(num);
1168     aco_save_T	aco;
1169 
1170     if (line == NULL)
1171     {
1172 	rb_raise(rb_eIndexError, "NULL line");
1173     }
1174     else if (n >= 0 && n <= buf->b_ml.ml_line_count)
1175     {
1176 	/* set curwin/curbuf for "buf" and save some things */
1177 	aucmd_prepbuf(&aco, buf);
1178 
1179 	if (u_inssub(n + 1) == OK) {
1180 	    ml_append(n, (char_u *) line, (colnr_T) 0, FALSE);
1181 
1182 	    /*  Changes to non-active buffers should properly refresh screen
1183 	     *    SegPhault - 12/20/04 */
1184 	    appended_lines_mark(n, 1L);
1185 
1186 	    changed();
1187 	}
1188 
1189 	/* restore curwin/curbuf and a few other things */
1190 	aucmd_restbuf(&aco);
1191 	/* Careful: autocommands may have made "buf" invalid! */
1192 
1193 	update_curbuf(NOT_VALID);
1194     }
1195     else
1196     {
1197 	rb_raise(rb_eIndexError, "line number %ld out of range", n);
1198     }
1199     return str;
1200 }
1201 
1202 static VALUE window_new(win_T *win)
1203 {
1204     if (win->w_ruby_ref)
1205     {
1206 	return (VALUE) win->w_ruby_ref;
1207     }
1208     else
1209     {
1210 	VALUE obj = Data_Wrap_Struct(cVimWindow, 0, 0, win);
1211 	win->w_ruby_ref = (void *) obj;
1212 	rb_hash_aset(objtbl, rb_obj_id(obj), obj);
1213 	return obj;
1214     }
1215 }
1216 
1217 static win_T *get_win(VALUE obj)
1218 {
1219     win_T *win;
1220 
1221     Data_Get_Struct(obj, win_T, win);
1222     if (win == NULL)
1223 	rb_raise(eDeletedWindowError, "attempt to refer to deleted window");
1224     return win;
1225 }
1226 
1227 static VALUE window_s_current()
1228 {
1229     return window_new(curwin);
1230 }
1231 
1232 /*
1233  * Added line manipulation functions
1234  *    SegPhault - 03/07/05
1235  */
1236 static VALUE line_s_current()
1237 {
1238     return get_buffer_line(curbuf, curwin->w_cursor.lnum);
1239 }
1240 
1241 static VALUE set_current_line(VALUE self UNUSED, VALUE str)
1242 {
1243     return set_buffer_line(curbuf, curwin->w_cursor.lnum, str);
1244 }
1245 
1246 static VALUE current_line_number()
1247 {
1248     return INT2FIX((int)curwin->w_cursor.lnum);
1249 }
1250 
1251 
1252 
1253 static VALUE window_s_count()
1254 {
1255 #ifdef FEAT_WINDOWS
1256     win_T	*w;
1257     int n = 0;
1258 
1259     for (w = firstwin; w != NULL; w = w->w_next)
1260 	n++;
1261     return INT2NUM(n);
1262 #else
1263     return INT2NUM(1);
1264 #endif
1265 }
1266 
1267 static VALUE window_s_aref(VALUE self UNUSED, VALUE num)
1268 {
1269     win_T *w;
1270     int n = NUM2INT(num);
1271 
1272 #ifndef FEAT_WINDOWS
1273     w = curwin;
1274 #else
1275     for (w = firstwin; w != NULL; w = w->w_next, --n)
1276 #endif
1277 	if (n == 0)
1278 	    return window_new(w);
1279     return Qnil;
1280 }
1281 
1282 static VALUE window_buffer(VALUE self)
1283 {
1284     win_T *win = get_win(self);
1285 
1286     return buffer_new(win->w_buffer);
1287 }
1288 
1289 static VALUE window_height(VALUE self)
1290 {
1291     win_T *win = get_win(self);
1292 
1293     return INT2NUM(win->w_height);
1294 }
1295 
1296 static VALUE window_set_height(VALUE self, VALUE height)
1297 {
1298     win_T *win = get_win(self);
1299     win_T *savewin = curwin;
1300 
1301     curwin = win;
1302     win_setheight(NUM2INT(height));
1303     curwin = savewin;
1304     return height;
1305 }
1306 
1307 static VALUE window_width(VALUE self UNUSED)
1308 {
1309     return INT2NUM(W_WIDTH(get_win(self)));
1310 }
1311 
1312 static VALUE window_set_width(VALUE self UNUSED, VALUE width)
1313 {
1314 #ifdef FEAT_VERTSPLIT
1315     win_T *win = get_win(self);
1316     win_T *savewin = curwin;
1317 
1318     curwin = win;
1319     win_setwidth(NUM2INT(width));
1320     curwin = savewin;
1321 #endif
1322     return width;
1323 }
1324 
1325 static VALUE window_cursor(VALUE self)
1326 {
1327     win_T *win = get_win(self);
1328 
1329     return rb_assoc_new(INT2NUM(win->w_cursor.lnum), INT2NUM(win->w_cursor.col));
1330 }
1331 
1332 static VALUE window_set_cursor(VALUE self, VALUE pos)
1333 {
1334     VALUE lnum, col;
1335     win_T *win = get_win(self);
1336 
1337     Check_Type(pos, T_ARRAY);
1338     if (RARRAY_LEN(pos) != 2)
1339 	rb_raise(rb_eArgError, "array length must be 2");
1340     lnum = RARRAY_PTR(pos)[0];
1341     col = RARRAY_PTR(pos)[1];
1342     win->w_cursor.lnum = NUM2LONG(lnum);
1343     win->w_cursor.col = NUM2UINT(col);
1344     check_cursor();		    /* put cursor on an existing line */
1345     update_screen(NOT_VALID);
1346     return Qnil;
1347 }
1348 
1349 static VALUE f_nop(VALUE self UNUSED)
1350 {
1351     return Qnil;
1352 }
1353 
1354 static VALUE f_p(int argc, VALUE *argv, VALUE self UNUSED)
1355 {
1356     int i;
1357     VALUE str = rb_str_new("", 0);
1358 
1359     for (i = 0; i < argc; i++) {
1360 	if (i > 0) rb_str_cat(str, ", ", 2);
1361 	rb_str_concat(str, rb_inspect(argv[i]));
1362     }
1363     MSG(RSTRING_PTR(str));
1364     return Qnil;
1365 }
1366 
1367 static void ruby_io_init(void)
1368 {
1369 #ifndef DYNAMIC_RUBY
1370     RUBYEXTERN VALUE rb_stdout;
1371 #endif
1372 
1373     rb_stdout = rb_obj_alloc(rb_cObject);
1374     rb_define_singleton_method(rb_stdout, "write", vim_message, 1);
1375     rb_define_singleton_method(rb_stdout, "flush", f_nop, 0);
1376     rb_define_global_function("p", f_p, -1);
1377 }
1378 
1379 static void ruby_vim_init(void)
1380 {
1381     objtbl = rb_hash_new();
1382     rb_global_variable(&objtbl);
1383 
1384     /* The Vim module used to be called "VIM", but "Vim" is better.  Make an
1385      * alias "VIM" for backwards compatibility. */
1386     mVIM = rb_define_module("Vim");
1387     rb_define_const(rb_cObject, "VIM", mVIM);
1388     rb_define_const(mVIM, "VERSION_MAJOR", INT2NUM(VIM_VERSION_MAJOR));
1389     rb_define_const(mVIM, "VERSION_MINOR", INT2NUM(VIM_VERSION_MINOR));
1390     rb_define_const(mVIM, "VERSION_BUILD", INT2NUM(VIM_VERSION_BUILD));
1391     rb_define_const(mVIM, "VERSION_PATCHLEVEL", INT2NUM(VIM_VERSION_PATCHLEVEL));
1392     rb_define_const(mVIM, "VERSION_SHORT", rb_str_new2(VIM_VERSION_SHORT));
1393     rb_define_const(mVIM, "VERSION_MEDIUM", rb_str_new2(VIM_VERSION_MEDIUM));
1394     rb_define_const(mVIM, "VERSION_LONG", rb_str_new2(VIM_VERSION_LONG));
1395     rb_define_const(mVIM, "VERSION_LONG_DATE", rb_str_new2(VIM_VERSION_LONG_DATE));
1396     rb_define_module_function(mVIM, "message", vim_message, 1);
1397     rb_define_module_function(mVIM, "set_option", vim_set_option, 1);
1398     rb_define_module_function(mVIM, "command", vim_command, 1);
1399     rb_define_module_function(mVIM, "evaluate", vim_evaluate, 1);
1400 
1401     eDeletedBufferError = rb_define_class_under(mVIM, "DeletedBufferError",
1402 						rb_eStandardError);
1403     eDeletedWindowError = rb_define_class_under(mVIM, "DeletedWindowError",
1404 						rb_eStandardError);
1405 
1406     cBuffer = rb_define_class_under(mVIM, "Buffer", rb_cObject);
1407     rb_define_singleton_method(cBuffer, "current", buffer_s_current, 0);
1408     rb_define_singleton_method(cBuffer, "count", buffer_s_count, 0);
1409     rb_define_singleton_method(cBuffer, "[]", buffer_s_aref, 1);
1410     rb_define_method(cBuffer, "name", buffer_name, 0);
1411     rb_define_method(cBuffer, "number", buffer_number, 0);
1412     rb_define_method(cBuffer, "count", buffer_count, 0);
1413     rb_define_method(cBuffer, "length", buffer_count, 0);
1414     rb_define_method(cBuffer, "[]", buffer_aref, 1);
1415     rb_define_method(cBuffer, "[]=", buffer_aset, 2);
1416     rb_define_method(cBuffer, "delete", buffer_delete, 1);
1417     rb_define_method(cBuffer, "append", buffer_append, 2);
1418 
1419     /* Added line manipulation functions
1420      *   SegPhault - 03/07/05 */
1421     rb_define_method(cBuffer, "line_number", current_line_number, 0);
1422     rb_define_method(cBuffer, "line", line_s_current, 0);
1423     rb_define_method(cBuffer, "line=", set_current_line, 1);
1424 
1425 
1426     cVimWindow = rb_define_class_under(mVIM, "Window", rb_cObject);
1427     rb_define_singleton_method(cVimWindow, "current", window_s_current, 0);
1428     rb_define_singleton_method(cVimWindow, "count", window_s_count, 0);
1429     rb_define_singleton_method(cVimWindow, "[]", window_s_aref, 1);
1430     rb_define_method(cVimWindow, "buffer", window_buffer, 0);
1431     rb_define_method(cVimWindow, "height", window_height, 0);
1432     rb_define_method(cVimWindow, "height=", window_set_height, 1);
1433     rb_define_method(cVimWindow, "width", window_width, 0);
1434     rb_define_method(cVimWindow, "width=", window_set_width, 1);
1435     rb_define_method(cVimWindow, "cursor", window_cursor, 0);
1436     rb_define_method(cVimWindow, "cursor=", window_set_cursor, 1);
1437 
1438     rb_define_virtual_variable("$curbuf", buffer_s_current, 0);
1439     rb_define_virtual_variable("$curwin", window_s_current, 0);
1440 }
1441 
1442 void vim_ruby_init(void *stack_start)
1443 {
1444     /* should get machine stack start address early in main function */
1445     ruby_stack_start = stack_start;
1446 }
1447