xref: /vim-8.2.3635/src/if_ruby.c (revision ed32d942) 
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    /* Do not generate a prototype here, VALUE isn't always defined. */
422 # if defined(USE_RGENGC) && USE_RGENGC && !defined(PROTO)
423 void rb_gc_writebarrier_unprotect_promoted_stub(VALUE obj)
424 {
425     dll_rb_gc_writebarrier_unprotect_promoted(obj);
426 }
427 # endif
428 
429 static HINSTANCE hinstRuby = NULL; /* Instance of ruby.dll */
430 
431 /*
432  * Table of name to function pointer of ruby.
433  */
434 static struct
435 {
436     char *name;
437     RUBY_PROC *ptr;
438 } ruby_funcname_table[] =
439 {
440     {"rb_assoc_new", (RUBY_PROC*)&dll_rb_assoc_new},
441     {"rb_cFalseClass", (RUBY_PROC*)&dll_rb_cFalseClass},
442     {"rb_cFixnum", (RUBY_PROC*)&dll_rb_cFixnum},
443 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 20
444     {"rb_cFloat", (RUBY_PROC*)&dll_rb_cFloat},
445 # endif
446     {"rb_cNilClass", (RUBY_PROC*)&dll_rb_cNilClass},
447     {"rb_cObject", (RUBY_PROC*)&dll_rb_cObject},
448     {"rb_cSymbol", (RUBY_PROC*)&dll_rb_cSymbol},
449     {"rb_cTrueClass", (RUBY_PROC*)&dll_rb_cTrueClass},
450     {"rb_check_type", (RUBY_PROC*)&dll_rb_check_type},
451     {"rb_class_path", (RUBY_PROC*)&dll_rb_class_path},
452     {"rb_data_object_alloc", (RUBY_PROC*)&dll_rb_data_object_alloc},
453     {"rb_define_class_under", (RUBY_PROC*)&dll_rb_define_class_under},
454     {"rb_define_const", (RUBY_PROC*)&dll_rb_define_const},
455     {"rb_define_global_function", (RUBY_PROC*)&dll_rb_define_global_function},
456     {"rb_define_method", (RUBY_PROC*)&dll_rb_define_method},
457     {"rb_define_module", (RUBY_PROC*)&dll_rb_define_module},
458     {"rb_define_module_function", (RUBY_PROC*)&dll_rb_define_module_function},
459     {"rb_define_singleton_method", (RUBY_PROC*)&dll_rb_define_singleton_method},
460     {"rb_define_virtual_variable", (RUBY_PROC*)&dll_rb_define_virtual_variable},
461     {"rb_stdout", (RUBY_PROC*)&dll_rb_stdout},
462     {"rb_eArgError", (RUBY_PROC*)&dll_rb_eArgError},
463     {"rb_eIndexError", (RUBY_PROC*)&dll_rb_eIndexError},
464     {"rb_eRuntimeError", (RUBY_PROC*)&dll_rb_eRuntimeError},
465     {"rb_eStandardError", (RUBY_PROC*)&dll_rb_eStandardError},
466     {"rb_eval_string_protect", (RUBY_PROC*)&dll_rb_eval_string_protect},
467     {"rb_global_variable", (RUBY_PROC*)&dll_rb_global_variable},
468     {"rb_hash_aset", (RUBY_PROC*)&dll_rb_hash_aset},
469     {"rb_hash_new", (RUBY_PROC*)&dll_rb_hash_new},
470     {"rb_inspect", (RUBY_PROC*)&dll_rb_inspect},
471     {"rb_int2inum", (RUBY_PROC*)&dll_rb_int2inum},
472 # if VIM_SIZEOF_INT < VIM_SIZEOF_LONG /* 64 bits only */
473     {"rb_fix2int", (RUBY_PROC*)&dll_rb_fix2int},
474     {"rb_num2int", (RUBY_PROC*)&dll_rb_num2int},
475     {"rb_num2uint", (RUBY_PROC*)&dll_rb_num2uint},
476 # endif
477     {"rb_lastline_get", (RUBY_PROC*)&dll_rb_lastline_get},
478     {"rb_lastline_set", (RUBY_PROC*)&dll_rb_lastline_set},
479     {"rb_load_protect", (RUBY_PROC*)&dll_rb_load_protect},
480     {"rb_num2long", (RUBY_PROC*)&dll_rb_num2long},
481     {"rb_num2ulong", (RUBY_PROC*)&dll_rb_num2ulong},
482     {"rb_obj_alloc", (RUBY_PROC*)&dll_rb_obj_alloc},
483     {"rb_obj_as_string", (RUBY_PROC*)&dll_rb_obj_as_string},
484     {"rb_obj_id", (RUBY_PROC*)&dll_rb_obj_id},
485     {"rb_raise", (RUBY_PROC*)&dll_rb_raise},
486 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
487     {"rb_string_value", (RUBY_PROC*)&dll_rb_string_value},
488 # else
489     {"rb_str2cstr", (RUBY_PROC*)&dll_rb_str2cstr},
490 # endif
491     {"rb_str_cat", (RUBY_PROC*)&dll_rb_str_cat},
492     {"rb_str_concat", (RUBY_PROC*)&dll_rb_str_concat},
493     {"rb_str_new", (RUBY_PROC*)&dll_rb_str_new},
494 # ifdef need_rb_str_new_cstr
495     {"rb_str_new_cstr", (RUBY_PROC*)&dll_rb_str_new_cstr},
496 # else
497     {"rb_str_new2", (RUBY_PROC*)&dll_rb_str_new2},
498 # endif
499 # ifdef RUBY19_OR_LATER
500     {"rb_errinfo", (RUBY_PROC*)&dll_rb_errinfo},
501 # else
502     {"ruby_errinfo", (RUBY_PROC*)&dll_ruby_errinfo},
503 # endif
504     {"ruby_init", (RUBY_PROC*)&dll_ruby_init},
505     {"ruby_init_loadpath", (RUBY_PROC*)&dll_ruby_init_loadpath},
506 # ifdef WIN3264
507     {
508 #  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER < 19
509     "NtInitialize",
510 #  else
511     "ruby_sysinit",
512 #  endif
513 			(RUBY_PROC*)&dll_NtInitialize},
514 #  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
515     {"rb_w32_snprintf", (RUBY_PROC*)&dll_rb_w32_snprintf},
516 #  endif
517 # endif
518 # if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 18
519     {"rb_string_value_ptr", (RUBY_PROC*)&dll_rb_string_value_ptr},
520 #  if DYNAMIC_RUBY_VER <= 19
521     {"rb_float_new", (RUBY_PROC*)&dll_rb_float_new},
522 #  else
523     {"rb_float_new_in_heap", (RUBY_PROC*)&dll_rb_float_new},
524 #  endif
525     {"rb_ary_new", (RUBY_PROC*)&dll_rb_ary_new},
526     {"rb_ary_push", (RUBY_PROC*)&dll_rb_ary_push},
527 # endif
528 # ifdef RUBY19_OR_LATER
529     {"rb_int2big", (RUBY_PROC*)&dll_rb_int2big},
530     {"ruby_script", (RUBY_PROC*)&dll_ruby_script},
531     {"rb_enc_find_index", (RUBY_PROC*)&dll_rb_enc_find_index},
532     {"rb_enc_find", (RUBY_PROC*)&dll_rb_enc_find},
533     {"rb_enc_str_new", (RUBY_PROC*)&dll_rb_enc_str_new},
534     {"rb_sprintf", (RUBY_PROC*)&dll_rb_sprintf},
535     {"rb_require", (RUBY_PROC*)&dll_rb_require},
536     {"ruby_process_options", (RUBY_PROC*)&dll_ruby_process_options},
537 # endif
538 # if defined(RUBY19_OR_LATER) || defined(RUBY_INIT_STACK)
539 #  ifdef __ia64
540     {"rb_ia64_bsp", (RUBY_PROC*)&dll_rb_ia64_bsp},
541 #  endif
542     {"ruby_init_stack", (RUBY_PROC*)&dll_ruby_init_stack},
543 # endif
544 # if defined(USE_RGENGC) && USE_RGENGC
545     {"rb_gc_writebarrier_unprotect_promoted", (RUBY_PROC*)&dll_rb_gc_writebarrier_unprotect_promoted},
546 # endif
547     {"", NULL},
548 };
549 
550 /*
551  * Free ruby.dll
552  */
553     static void
554 end_dynamic_ruby()
555 {
556     if (hinstRuby)
557     {
558 	close_dll(hinstRuby);
559 	hinstRuby = NULL;
560     }
561 }
562 
563 /*
564  * Load library and get all pointers.
565  * Parameter 'libname' provides name of DLL.
566  * Return OK or FAIL.
567  */
568     static int
569 ruby_runtime_link_init(char *libname, int verbose)
570 {
571     int i;
572 
573     if (hinstRuby)
574 	return OK;
575     hinstRuby = load_dll(libname);
576     if (!hinstRuby)
577     {
578 	if (verbose)
579 	    EMSG2(_(e_loadlib), libname);
580 	return FAIL;
581     }
582 
583     for (i = 0; ruby_funcname_table[i].ptr; ++i)
584     {
585 	if (!(*ruby_funcname_table[i].ptr = symbol_from_dll(hinstRuby,
586 			ruby_funcname_table[i].name)))
587 	{
588 	    close_dll(hinstRuby);
589 	    hinstRuby = NULL;
590 	    if (verbose)
591 		EMSG2(_(e_loadfunc), ruby_funcname_table[i].name);
592 	    return FAIL;
593 	}
594     }
595     return OK;
596 }
597 
598 /*
599  * If ruby is enabled (there is installed ruby on Windows system) return TRUE,
600  * else FALSE.
601  */
602     int
603 ruby_enabled(verbose)
604     int		verbose;
605 {
606     return ruby_runtime_link_init(DYNAMIC_RUBY_DLL, verbose) == OK;
607 }
608 #endif /* defined(DYNAMIC_RUBY) || defined(PROTO) */
609 
610     void
611 ruby_end()
612 {
613 #ifdef DYNAMIC_RUBY
614     end_dynamic_ruby();
615 #endif
616 }
617 
618 void ex_ruby(exarg_T *eap)
619 {
620     int state;
621     char *script = NULL;
622 
623     script = (char *)script_get(eap, eap->arg);
624     if (!eap->skip && ensure_ruby_initialized())
625     {
626 	if (script == NULL)
627 	    rb_eval_string_protect((char *)eap->arg, &state);
628 	else
629 	    rb_eval_string_protect(script, &state);
630 	if (state)
631 	    error_print(state);
632     }
633     vim_free(script);
634 }
635 
636 /*
637  *  In Ruby 1.9 or later, ruby String object has encoding.
638  *  conversion buffer string of vim to ruby String object using
639  *  VIM encoding option.
640  */
641     static VALUE
642 vim_str2rb_enc_str(const char *s)
643 {
644 #ifdef RUBY19_OR_LATER
645     int isnum;
646     long lval;
647     char_u *sval;
648     rb_encoding *enc;
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 	    return rb_enc_str_new(s, strlen(s), enc);
657 	}
658     }
659 #endif
660     return rb_str_new2(s);
661 }
662 
663     static VALUE
664 eval_enc_string_protect(const char *str, int *state)
665 {
666 #ifdef RUBY19_OR_LATER
667     int isnum;
668     long lval;
669     char_u *sval;
670     rb_encoding *enc;
671     VALUE v;
672 
673     isnum = get_option_value((char_u *)"enc", &lval, &sval, 0);
674     if (isnum == 0)
675     {
676 	enc = rb_enc_find((char *)sval);
677 	vim_free(sval);
678 	if (enc)
679 	{
680 	    v = rb_sprintf("#-*- coding:%s -*-\n%s", rb_enc_name(enc), str);
681 	    return rb_eval_string_protect(StringValuePtr(v), state);
682 	}
683     }
684 #endif
685     return rb_eval_string_protect(str, state);
686 }
687 
688 void ex_rubydo(exarg_T *eap)
689 {
690     int state;
691     linenr_T i;
692 
693     if (ensure_ruby_initialized())
694     {
695 	if (u_save(eap->line1 - 1, eap->line2 + 1) != OK)
696 	    return;
697 	for (i = eap->line1; i <= eap->line2; i++) {
698 	    VALUE line;
699 
700 	    line = vim_str2rb_enc_str((char *)ml_get(i));
701 	    rb_lastline_set(line);
702 	    eval_enc_string_protect((char *) eap->arg, &state);
703 	    if (state) {
704 		error_print(state);
705 		break;
706 	    }
707 	    line = rb_lastline_get();
708 	    if (!NIL_P(line)) {
709 		if (TYPE(line) != T_STRING) {
710 		    EMSG(_("E265: $_ must be an instance of String"));
711 		    return;
712 		}
713 		ml_replace(i, (char_u *) StringValuePtr(line), 1);
714 		changed();
715 #ifdef SYNTAX_HL
716 		syn_changed(i); /* recompute syntax hl. for this line */
717 #endif
718 	    }
719 	}
720 	check_cursor();
721 	update_curbuf(NOT_VALID);
722     }
723 }
724 
725 void ex_rubyfile(exarg_T *eap)
726 {
727     int state;
728 
729     if (ensure_ruby_initialized())
730     {
731 	rb_load_protect(rb_str_new2((char *) eap->arg), 0, &state);
732 	if (state) error_print(state);
733     }
734 }
735 
736 void ruby_buffer_free(buf_T *buf)
737 {
738     if (buf->b_ruby_ref)
739     {
740 	rb_hash_aset(objtbl, rb_obj_id((VALUE) buf->b_ruby_ref), Qnil);
741 	RDATA(buf->b_ruby_ref)->data = NULL;
742     }
743 }
744 
745 void ruby_window_free(win_T *win)
746 {
747     if (win->w_ruby_ref)
748     {
749 	rb_hash_aset(objtbl, rb_obj_id((VALUE) win->w_ruby_ref), Qnil);
750 	RDATA(win->w_ruby_ref)->data = NULL;
751     }
752 }
753 
754 static int ensure_ruby_initialized(void)
755 {
756     if (!ruby_initialized)
757     {
758 #ifdef DYNAMIC_RUBY
759 	if (ruby_enabled(TRUE))
760 	{
761 #endif
762 #ifdef _WIN32
763 	    /* suggested by Ariya Mizutani */
764 	    int argc = 1;
765 	    char *argv[] = {"gvim.exe"};
766 	    char **argvp = argv;
767 	    NtInitialize(&argc, &argvp);
768 #endif
769 	    {
770 #if defined(RUBY19_OR_LATER) || defined(RUBY_INIT_STACK)
771 		ruby_init_stack(ruby_stack_start);
772 #endif
773 		ruby_init();
774 	    }
775 #ifdef RUBY19_OR_LATER
776 	    {
777 		int dummy_argc = 2;
778 		char *dummy_argv[] = {"vim-ruby", "-e0"};
779 		ruby_process_options(dummy_argc, dummy_argv);
780 	    }
781 	    ruby_script("vim-ruby");
782 #else
783 	    ruby_init_loadpath();
784 #endif
785 	    ruby_io_init();
786 	    ruby_vim_init();
787 	    ruby_initialized = 1;
788 #ifdef DYNAMIC_RUBY
789 	}
790 	else
791 	{
792 	    EMSG(_("E266: Sorry, this command is disabled, the Ruby library could not be loaded."));
793 	    return 0;
794 	}
795 #endif
796     }
797     return ruby_initialized;
798 }
799 
800 static void error_print(int state)
801 {
802 #ifndef DYNAMIC_RUBY
803 #if !(defined(RUBY_VERSION) && RUBY_VERSION >= 19) \
804     && !(defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 19)
805     RUBYEXTERN VALUE ruby_errinfo;
806 #endif
807 #endif
808     VALUE eclass;
809     VALUE einfo;
810     char buff[BUFSIZ];
811 
812 #define TAG_RETURN	0x1
813 #define TAG_BREAK	0x2
814 #define TAG_NEXT	0x3
815 #define TAG_RETRY	0x4
816 #define TAG_REDO	0x5
817 #define TAG_RAISE	0x6
818 #define TAG_THROW	0x7
819 #define TAG_FATAL	0x8
820 #define TAG_MASK	0xf
821 
822     switch (state) {
823     case TAG_RETURN:
824 	EMSG(_("E267: unexpected return"));
825 	break;
826     case TAG_NEXT:
827 	EMSG(_("E268: unexpected next"));
828 	break;
829     case TAG_BREAK:
830 	EMSG(_("E269: unexpected break"));
831 	break;
832     case TAG_REDO:
833 	EMSG(_("E270: unexpected redo"));
834 	break;
835     case TAG_RETRY:
836 	EMSG(_("E271: retry outside of rescue clause"));
837 	break;
838     case TAG_RAISE:
839     case TAG_FATAL:
840 #ifdef RUBY19_OR_LATER
841 	eclass = CLASS_OF(rb_errinfo());
842 	einfo = rb_obj_as_string(rb_errinfo());
843 #else
844 	eclass = CLASS_OF(ruby_errinfo);
845 	einfo = rb_obj_as_string(ruby_errinfo);
846 #endif
847 	if (eclass == rb_eRuntimeError && RSTRING_LEN(einfo) == 0) {
848 	    EMSG(_("E272: unhandled exception"));
849 	}
850 	else {
851 	    VALUE epath;
852 	    char *p;
853 
854 	    epath = rb_class_path(eclass);
855 	    vim_snprintf(buff, BUFSIZ, "%s: %s",
856 		     RSTRING_PTR(epath), RSTRING_PTR(einfo));
857 	    p = strchr(buff, '\n');
858 	    if (p) *p = '\0';
859 	    EMSG(buff);
860 	}
861 	break;
862     default:
863 	vim_snprintf(buff, BUFSIZ, _("E273: unknown longjmp status %d"), state);
864 	EMSG(buff);
865 	break;
866     }
867 }
868 
869 static VALUE vim_message(VALUE self UNUSED, VALUE str)
870 {
871     char *buff, *p;
872 
873     str = rb_obj_as_string(str);
874     if (RSTRING_LEN(str) > 0)
875     {
876 	/* Only do this when the string isn't empty, alloc(0) causes trouble. */
877 	buff = ALLOCA_N(char, RSTRING_LEN(str));
878 	strcpy(buff, RSTRING_PTR(str));
879 	p = strchr(buff, '\n');
880 	if (p) *p = '\0';
881 	MSG(buff);
882     }
883     else
884     {
885 	MSG("");
886     }
887     return Qnil;
888 }
889 
890 static VALUE vim_set_option(VALUE self UNUSED, VALUE str)
891 {
892     do_set((char_u *)StringValuePtr(str), 0);
893     update_screen(NOT_VALID);
894     return Qnil;
895 }
896 
897 static VALUE vim_command(VALUE self UNUSED, VALUE str)
898 {
899     do_cmdline_cmd((char_u *)StringValuePtr(str));
900     return Qnil;
901 }
902 
903 #ifdef FEAT_EVAL
904 static VALUE vim_to_ruby(typval_T *tv)
905 {
906     VALUE result = Qnil;
907 
908     if (tv->v_type == VAR_STRING)
909     {
910 	result = rb_str_new2(tv->vval.v_string == NULL
911 					  ? "" : (char *)(tv->vval.v_string));
912     }
913     else if (tv->v_type == VAR_NUMBER)
914     {
915 	result = INT2NUM(tv->vval.v_number);
916     }
917 # ifdef FEAT_FLOAT
918     else if (tv->v_type == VAR_FLOAT)
919     {
920 	result = rb_float_new(tv->vval.v_float);
921     }
922 # endif
923     else if (tv->v_type == VAR_LIST)
924     {
925 	list_T      *list = tv->vval.v_list;
926 	listitem_T  *curr;
927 
928 	result = rb_ary_new();
929 
930 	if (list != NULL)
931 	{
932 	    for (curr = list->lv_first; curr != NULL; curr = curr->li_next)
933 	    {
934 		rb_ary_push(result, vim_to_ruby(&curr->li_tv));
935 	    }
936 	}
937     }
938     else if (tv->v_type == VAR_DICT)
939     {
940 	result = rb_hash_new();
941 
942 	if (tv->vval.v_dict != NULL)
943 	{
944 	    hashtab_T   *ht = &tv->vval.v_dict->dv_hashtab;
945 	    long_u      todo = ht->ht_used;
946 	    hashitem_T  *hi;
947 	    dictitem_T  *di;
948 
949 	    for (hi = ht->ht_array; todo > 0; ++hi)
950 	    {
951 		if (!HASHITEM_EMPTY(hi))
952 		{
953 		    --todo;
954 
955 		    di = dict_lookup(hi);
956 		    rb_hash_aset(result, rb_str_new2((char *)hi->hi_key),
957 						     vim_to_ruby(&di->di_tv));
958 		}
959 	    }
960 	}
961     } /* else return Qnil; */
962 
963     return result;
964 }
965 #endif
966 
967 static VALUE vim_evaluate(VALUE self UNUSED, VALUE str)
968 {
969 #ifdef FEAT_EVAL
970     typval_T    *tv;
971     VALUE       result;
972 
973     tv = eval_expr((char_u *)StringValuePtr(str), NULL);
974     if (tv == NULL)
975     {
976 	return Qnil;
977     }
978     result = vim_to_ruby(tv);
979 
980     free_tv(tv);
981 
982     return result;
983 #else
984     return Qnil;
985 #endif
986 }
987 
988 static VALUE buffer_new(buf_T *buf)
989 {
990     if (buf->b_ruby_ref)
991     {
992 	return (VALUE) buf->b_ruby_ref;
993     }
994     else
995     {
996 	VALUE obj = Data_Wrap_Struct(cBuffer, 0, 0, buf);
997 	buf->b_ruby_ref = (void *) obj;
998 	rb_hash_aset(objtbl, rb_obj_id(obj), obj);
999 	return obj;
1000     }
1001 }
1002 
1003 static buf_T *get_buf(VALUE obj)
1004 {
1005     buf_T *buf;
1006 
1007     Data_Get_Struct(obj, buf_T, buf);
1008     if (buf == NULL)
1009 	rb_raise(eDeletedBufferError, "attempt to refer to deleted buffer");
1010     return buf;
1011 }
1012 
1013 static VALUE buffer_s_current()
1014 {
1015     return buffer_new(curbuf);
1016 }
1017 
1018 static VALUE buffer_s_count()
1019 {
1020     buf_T *b;
1021     int n = 0;
1022 
1023     for (b = firstbuf; b != NULL; b = b->b_next)
1024     {
1025 	/*  Deleted buffers should not be counted
1026 	 *    SegPhault - 01/07/05 */
1027 	if (b->b_p_bl)
1028 	    n++;
1029     }
1030 
1031     return INT2NUM(n);
1032 }
1033 
1034 static VALUE buffer_s_aref(VALUE self UNUSED, VALUE num)
1035 {
1036     buf_T *b;
1037     int n = NUM2INT(num);
1038 
1039     for (b = firstbuf; b != NULL; b = b->b_next)
1040     {
1041 	/*  Deleted buffers should not be counted
1042 	 *    SegPhault - 01/07/05 */
1043 	if (!b->b_p_bl)
1044 	    continue;
1045 
1046 	if (n == 0)
1047 	    return buffer_new(b);
1048 
1049 	n--;
1050     }
1051     return Qnil;
1052 }
1053 
1054 static VALUE buffer_name(VALUE self)
1055 {
1056     buf_T *buf = get_buf(self);
1057 
1058     return buf->b_ffname ? rb_str_new2((char *)buf->b_ffname) : Qnil;
1059 }
1060 
1061 static VALUE buffer_number(VALUE self)
1062 {
1063     buf_T *buf = get_buf(self);
1064 
1065     return INT2NUM(buf->b_fnum);
1066 }
1067 
1068 static VALUE buffer_count(VALUE self)
1069 {
1070     buf_T *buf = get_buf(self);
1071 
1072     return INT2NUM(buf->b_ml.ml_line_count);
1073 }
1074 
1075 static VALUE get_buffer_line(buf_T *buf, linenr_T n)
1076 {
1077     if (n <= 0 || n > buf->b_ml.ml_line_count)
1078 	rb_raise(rb_eIndexError, "line number %ld out of range", (long)n);
1079     return vim_str2rb_enc_str((char *)ml_get_buf(buf, n, FALSE));
1080 }
1081 
1082 static VALUE buffer_aref(VALUE self, VALUE num)
1083 {
1084     buf_T *buf = get_buf(self);
1085 
1086     if (buf != NULL)
1087 	return get_buffer_line(buf, (linenr_T)NUM2LONG(num));
1088     return Qnil; /* For stop warning */
1089 }
1090 
1091 static VALUE set_buffer_line(buf_T *buf, linenr_T n, VALUE str)
1092 {
1093     char	*line = StringValuePtr(str);
1094     aco_save_T	aco;
1095 
1096     if (n > 0 && n <= buf->b_ml.ml_line_count && line != NULL)
1097     {
1098 	/* set curwin/curbuf for "buf" and save some things */
1099 	aucmd_prepbuf(&aco, buf);
1100 
1101 	if (u_savesub(n) == OK) {
1102 	    ml_replace(n, (char_u *)line, TRUE);
1103 	    changed();
1104 #ifdef SYNTAX_HL
1105 	    syn_changed(n); /* recompute syntax hl. for this line */
1106 #endif
1107 	}
1108 
1109 	/* restore curwin/curbuf and a few other things */
1110 	aucmd_restbuf(&aco);
1111 	/* Careful: autocommands may have made "buf" invalid! */
1112 
1113 	update_curbuf(NOT_VALID);
1114     }
1115     else
1116     {
1117 	rb_raise(rb_eIndexError, "line number %ld out of range", (long)n);
1118     }
1119     return str;
1120 }
1121 
1122 static VALUE buffer_aset(VALUE self, VALUE num, VALUE str)
1123 {
1124     buf_T *buf = get_buf(self);
1125 
1126     if (buf != NULL)
1127 	return set_buffer_line(buf, (linenr_T)NUM2LONG(num), str);
1128     return str;
1129 }
1130 
1131 static VALUE buffer_delete(VALUE self, VALUE num)
1132 {
1133     buf_T	*buf = get_buf(self);
1134     long	n = NUM2LONG(num);
1135     aco_save_T	aco;
1136 
1137     if (n > 0 && n <= buf->b_ml.ml_line_count)
1138     {
1139 	/* set curwin/curbuf for "buf" and save some things */
1140 	aucmd_prepbuf(&aco, buf);
1141 
1142 	if (u_savedel(n, 1) == OK) {
1143 	    ml_delete(n, 0);
1144 
1145 	    /* Changes to non-active buffers should properly refresh
1146 	     *   SegPhault - 01/09/05 */
1147 	    deleted_lines_mark(n, 1L);
1148 
1149 	    changed();
1150 	}
1151 
1152 	/* restore curwin/curbuf and a few other things */
1153 	aucmd_restbuf(&aco);
1154 	/* Careful: autocommands may have made "buf" invalid! */
1155 
1156 	update_curbuf(NOT_VALID);
1157     }
1158     else
1159     {
1160 	rb_raise(rb_eIndexError, "line number %ld out of range", n);
1161     }
1162     return Qnil;
1163 }
1164 
1165 static VALUE buffer_append(VALUE self, VALUE num, VALUE str)
1166 {
1167     buf_T	*buf = get_buf(self);
1168     char	*line = StringValuePtr(str);
1169     long	n = NUM2LONG(num);
1170     aco_save_T	aco;
1171 
1172     if (line == NULL)
1173     {
1174 	rb_raise(rb_eIndexError, "NULL line");
1175     }
1176     else if (n >= 0 && n <= buf->b_ml.ml_line_count)
1177     {
1178 	/* set curwin/curbuf for "buf" and save some things */
1179 	aucmd_prepbuf(&aco, buf);
1180 
1181 	if (u_inssub(n + 1) == OK) {
1182 	    ml_append(n, (char_u *) line, (colnr_T) 0, FALSE);
1183 
1184 	    /*  Changes to non-active buffers should properly refresh screen
1185 	     *    SegPhault - 12/20/04 */
1186 	    appended_lines_mark(n, 1L);
1187 
1188 	    changed();
1189 	}
1190 
1191 	/* restore curwin/curbuf and a few other things */
1192 	aucmd_restbuf(&aco);
1193 	/* Careful: autocommands may have made "buf" invalid! */
1194 
1195 	update_curbuf(NOT_VALID);
1196     }
1197     else
1198     {
1199 	rb_raise(rb_eIndexError, "line number %ld out of range", n);
1200     }
1201     return str;
1202 }
1203 
1204 static VALUE window_new(win_T *win)
1205 {
1206     if (win->w_ruby_ref)
1207     {
1208 	return (VALUE) win->w_ruby_ref;
1209     }
1210     else
1211     {
1212 	VALUE obj = Data_Wrap_Struct(cVimWindow, 0, 0, win);
1213 	win->w_ruby_ref = (void *) obj;
1214 	rb_hash_aset(objtbl, rb_obj_id(obj), obj);
1215 	return obj;
1216     }
1217 }
1218 
1219 static win_T *get_win(VALUE obj)
1220 {
1221     win_T *win;
1222 
1223     Data_Get_Struct(obj, win_T, win);
1224     if (win == NULL)
1225 	rb_raise(eDeletedWindowError, "attempt to refer to deleted window");
1226     return win;
1227 }
1228 
1229 static VALUE window_s_current()
1230 {
1231     return window_new(curwin);
1232 }
1233 
1234 /*
1235  * Added line manipulation functions
1236  *    SegPhault - 03/07/05
1237  */
1238 static VALUE line_s_current()
1239 {
1240     return get_buffer_line(curbuf, curwin->w_cursor.lnum);
1241 }
1242 
1243 static VALUE set_current_line(VALUE self UNUSED, VALUE str)
1244 {
1245     return set_buffer_line(curbuf, curwin->w_cursor.lnum, str);
1246 }
1247 
1248 static VALUE current_line_number()
1249 {
1250     return INT2FIX((int)curwin->w_cursor.lnum);
1251 }
1252 
1253 
1254 
1255 static VALUE window_s_count()
1256 {
1257 #ifdef FEAT_WINDOWS
1258     win_T	*w;
1259     int n = 0;
1260 
1261     for (w = firstwin; w != NULL; w = w->w_next)
1262 	n++;
1263     return INT2NUM(n);
1264 #else
1265     return INT2NUM(1);
1266 #endif
1267 }
1268 
1269 static VALUE window_s_aref(VALUE self UNUSED, VALUE num)
1270 {
1271     win_T *w;
1272     int n = NUM2INT(num);
1273 
1274 #ifndef FEAT_WINDOWS
1275     w = curwin;
1276 #else
1277     for (w = firstwin; w != NULL; w = w->w_next, --n)
1278 #endif
1279 	if (n == 0)
1280 	    return window_new(w);
1281     return Qnil;
1282 }
1283 
1284 static VALUE window_buffer(VALUE self)
1285 {
1286     win_T *win = get_win(self);
1287 
1288     return buffer_new(win->w_buffer);
1289 }
1290 
1291 static VALUE window_height(VALUE self)
1292 {
1293     win_T *win = get_win(self);
1294 
1295     return INT2NUM(win->w_height);
1296 }
1297 
1298 static VALUE window_set_height(VALUE self, VALUE height)
1299 {
1300     win_T *win = get_win(self);
1301     win_T *savewin = curwin;
1302 
1303     curwin = win;
1304     win_setheight(NUM2INT(height));
1305     curwin = savewin;
1306     return height;
1307 }
1308 
1309 static VALUE window_width(VALUE self UNUSED)
1310 {
1311     return INT2NUM(W_WIDTH(get_win(self)));
1312 }
1313 
1314 static VALUE window_set_width(VALUE self UNUSED, VALUE width)
1315 {
1316 #ifdef FEAT_VERTSPLIT
1317     win_T *win = get_win(self);
1318     win_T *savewin = curwin;
1319 
1320     curwin = win;
1321     win_setwidth(NUM2INT(width));
1322     curwin = savewin;
1323 #endif
1324     return width;
1325 }
1326 
1327 static VALUE window_cursor(VALUE self)
1328 {
1329     win_T *win = get_win(self);
1330 
1331     return rb_assoc_new(INT2NUM(win->w_cursor.lnum), INT2NUM(win->w_cursor.col));
1332 }
1333 
1334 static VALUE window_set_cursor(VALUE self, VALUE pos)
1335 {
1336     VALUE lnum, col;
1337     win_T *win = get_win(self);
1338 
1339     Check_Type(pos, T_ARRAY);
1340     if (RARRAY_LEN(pos) != 2)
1341 	rb_raise(rb_eArgError, "array length must be 2");
1342     lnum = RARRAY_PTR(pos)[0];
1343     col = RARRAY_PTR(pos)[1];
1344     win->w_cursor.lnum = NUM2LONG(lnum);
1345     win->w_cursor.col = NUM2UINT(col);
1346     check_cursor();		    /* put cursor on an existing line */
1347     update_screen(NOT_VALID);
1348     return Qnil;
1349 }
1350 
1351 static VALUE f_nop(VALUE self UNUSED)
1352 {
1353     return Qnil;
1354 }
1355 
1356 static VALUE f_p(int argc, VALUE *argv, VALUE self UNUSED)
1357 {
1358     int i;
1359     VALUE str = rb_str_new("", 0);
1360 
1361     for (i = 0; i < argc; i++) {
1362 	if (i > 0) rb_str_cat(str, ", ", 2);
1363 	rb_str_concat(str, rb_inspect(argv[i]));
1364     }
1365     MSG(RSTRING_PTR(str));
1366     return Qnil;
1367 }
1368 
1369 static void ruby_io_init(void)
1370 {
1371 #ifndef DYNAMIC_RUBY
1372     RUBYEXTERN VALUE rb_stdout;
1373 #endif
1374 
1375     rb_stdout = rb_obj_alloc(rb_cObject);
1376     rb_define_singleton_method(rb_stdout, "write", vim_message, 1);
1377     rb_define_singleton_method(rb_stdout, "flush", f_nop, 0);
1378     rb_define_global_function("p", f_p, -1);
1379 }
1380 
1381 static void ruby_vim_init(void)
1382 {
1383     objtbl = rb_hash_new();
1384     rb_global_variable(&objtbl);
1385 
1386     /* The Vim module used to be called "VIM", but "Vim" is better.  Make an
1387      * alias "VIM" for backwards compatibility. */
1388     mVIM = rb_define_module("Vim");
1389     rb_define_const(rb_cObject, "VIM", mVIM);
1390     rb_define_const(mVIM, "VERSION_MAJOR", INT2NUM(VIM_VERSION_MAJOR));
1391     rb_define_const(mVIM, "VERSION_MINOR", INT2NUM(VIM_VERSION_MINOR));
1392     rb_define_const(mVIM, "VERSION_BUILD", INT2NUM(VIM_VERSION_BUILD));
1393     rb_define_const(mVIM, "VERSION_PATCHLEVEL", INT2NUM(VIM_VERSION_PATCHLEVEL));
1394     rb_define_const(mVIM, "VERSION_SHORT", rb_str_new2(VIM_VERSION_SHORT));
1395     rb_define_const(mVIM, "VERSION_MEDIUM", rb_str_new2(VIM_VERSION_MEDIUM));
1396     rb_define_const(mVIM, "VERSION_LONG", rb_str_new2(VIM_VERSION_LONG));
1397     rb_define_const(mVIM, "VERSION_LONG_DATE", rb_str_new2(VIM_VERSION_LONG_DATE));
1398     rb_define_module_function(mVIM, "message", vim_message, 1);
1399     rb_define_module_function(mVIM, "set_option", vim_set_option, 1);
1400     rb_define_module_function(mVIM, "command", vim_command, 1);
1401     rb_define_module_function(mVIM, "evaluate", vim_evaluate, 1);
1402 
1403     eDeletedBufferError = rb_define_class_under(mVIM, "DeletedBufferError",
1404 						rb_eStandardError);
1405     eDeletedWindowError = rb_define_class_under(mVIM, "DeletedWindowError",
1406 						rb_eStandardError);
1407 
1408     cBuffer = rb_define_class_under(mVIM, "Buffer", rb_cObject);
1409     rb_define_singleton_method(cBuffer, "current", buffer_s_current, 0);
1410     rb_define_singleton_method(cBuffer, "count", buffer_s_count, 0);
1411     rb_define_singleton_method(cBuffer, "[]", buffer_s_aref, 1);
1412     rb_define_method(cBuffer, "name", buffer_name, 0);
1413     rb_define_method(cBuffer, "number", buffer_number, 0);
1414     rb_define_method(cBuffer, "count", buffer_count, 0);
1415     rb_define_method(cBuffer, "length", buffer_count, 0);
1416     rb_define_method(cBuffer, "[]", buffer_aref, 1);
1417     rb_define_method(cBuffer, "[]=", buffer_aset, 2);
1418     rb_define_method(cBuffer, "delete", buffer_delete, 1);
1419     rb_define_method(cBuffer, "append", buffer_append, 2);
1420 
1421     /* Added line manipulation functions
1422      *   SegPhault - 03/07/05 */
1423     rb_define_method(cBuffer, "line_number", current_line_number, 0);
1424     rb_define_method(cBuffer, "line", line_s_current, 0);
1425     rb_define_method(cBuffer, "line=", set_current_line, 1);
1426 
1427 
1428     cVimWindow = rb_define_class_under(mVIM, "Window", rb_cObject);
1429     rb_define_singleton_method(cVimWindow, "current", window_s_current, 0);
1430     rb_define_singleton_method(cVimWindow, "count", window_s_count, 0);
1431     rb_define_singleton_method(cVimWindow, "[]", window_s_aref, 1);
1432     rb_define_method(cVimWindow, "buffer", window_buffer, 0);
1433     rb_define_method(cVimWindow, "height", window_height, 0);
1434     rb_define_method(cVimWindow, "height=", window_set_height, 1);
1435     rb_define_method(cVimWindow, "width", window_width, 0);
1436     rb_define_method(cVimWindow, "width=", window_set_width, 1);
1437     rb_define_method(cVimWindow, "cursor", window_cursor, 0);
1438     rb_define_method(cVimWindow, "cursor=", window_set_cursor, 1);
1439 
1440     rb_define_virtual_variable("$curbuf", buffer_s_current, 0);
1441     rb_define_virtual_variable("$curwin", window_s_current, 0);
1442 }
1443 
1444 void vim_ruby_init(void *stack_start)
1445 {
1446     /* should get machine stack start address early in main function */
1447     ruby_stack_start = stack_start;
1448 }
1449