mruby interface for vim

vim7-if_mruby.diff

diff -r ccbde540a714 runtime/doc/eval.txt
--- a/runtime/doc/eval.txt	Wed Apr 03 21:14:29 2013 +0200
+++ b/runtime/doc/eval.txt	Fri Apr 05 21:20:11 2013 +0900
@@ -6412,6 +6412,7 @@
 mouse_urxvt		Compiled with support for urxvt mouse.
 mouse_xterm		Compiled with support for xterm mouse.
 mouseshape		Compiled with support for 'mouseshape'.
+mruby			Compiled with MRuby interface |mruby|.
 multi_byte		Compiled with support for 'encoding'
 multi_byte_encoding	'encoding' is set to a multi-byte encoding.
 multi_byte_ime		Compiled with support for IME input method.
diff -r ccbde540a714 runtime/doc/help.txt
--- a/runtime/doc/help.txt	Wed Apr 03 21:14:29 2013 +0200
+++ b/runtime/doc/help.txt	Fri Apr 05 21:20:11 2013 +0900
@@ -166,6 +166,7 @@
 |if_tcl.txt|	Tcl interface
 |if_ole.txt|	OLE automation interface for Win32
 |if_ruby.txt|	Ruby interface
+|if_mruby.txt|	MRuby interface
 |debugger.txt|	Interface with a debugger
 |workshop.txt|	Sun Visual Workshop interface
 |netbeans.txt|	NetBeans External Editor interface
diff -r ccbde540a714 runtime/doc/if_mruby.txt
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/runtime/doc/if_mruby.txt	Fri Apr 05 21:20:11 2013 +0900
@@ -0,0 +1,207 @@
+*if_mruby.txt*   For Vim version 7.3.  Last change: 2013 Jan 30
+
+
+		  VIM REFERENCE MANUAL    by Yasuhiro Matsumoto
+
+The MRuby Interface to Vim				*mruby* *MRuby*
+
+
+1. Commands			|mruby-commands|
+2. The VIM module		|mruby-vim|
+3. VIM::Buffer objects		|mruby-buffer|
+4. VIM::Window objects		|mruby-window|
+5. Global variables		|mruby-globals|
+6. Using mrbgems		|mruby-mrbgems|
+
+{Vi does not have any of these commands}
+
+The MRuby interface only works when Vim was compiled with the |+mruby| feature.
+Most of features in if_mruby are similar to if_ruby.
+
+The home page for mruby is https://github.com/mruby/mruby/.  You can find
+links for downloading MRuby there.
+
+==============================================================================
+1. Commands						*mruby-commands*
+
+							*:mruby* *:mrub*
+:mrub[y] {cmd}		Execute MRuby command {cmd}.  A command to try it out: >
+				:mruby print "Hello"
+
+:mrub[y] << {endpattern}
+{script}
+{endpattern}
+			Execute MRuby script {script}.
+			{endpattern} must NOT be preceded by any white space.
+			If {endpattern} is omitted, it defaults to a dot '.'
+			like for the |:append| and |:insert| commands.  This
+			form of the |:mruby| command is mainly useful for
+			including mruby code in vim scripts.
+			Note: This command doesn't work when the MRuby feature
+			wasn't compiled in.  To avoid errors, see
+			|script-here|.
+
+Example Vim script: >
+
+	function! RedGem()
+	mruby << EOF
+	class Garnet
+		def initialize(s)
+			@buffer = VIM::Buffer.current
+			vimputs(s)
+		end
+		def vimputs(s)
+			@buffer.append(@buffer.count,s)
+		end
+	end
+	gem = Garnet.new("pretty")
+	EOF
+	endfunction
+<
+
+						*:mrubydo* *:mrubyd*
+:[range]mrubyd[o] {cmd}	Evaluate MRuby command {cmd} for each line in the
+			[range], with $_ being set to the text of each line in
+			turn, without a trailing <EOL>.  Setting $_ will change
+			the text, but note that it is not possible to add or
+			delete lines using this command.
+			The default for [range] is the whole file: "1,$".
+
+							*:mrubyfile* *:mrubyf*
+:mrubyf[ile] {file}	Execute the MRuby script in {file}.  This is the same
+			as ":mruby load 'file'", but allows file name
+			completion.
+
+Executing MRuby commands is not possible in the |sandbox|.
+
+==============================================================================
+2. The VIM module					*mruby-vim*
+
+MRuby code gets all of its access to vim via the "VIM" module.
+
+Overview >
+	print "Hello"			      # displays a message
+	VIM.command(cmd)		      # execute an Ex command
+	num = VIM::Window.count		      # gets the number of windows
+	w = VIM::Window[n]		      # gets window "n"
+	cw = VIM::Window.current	      # gets the current window
+	num = VIM::Buffer.count		      # gets the number of buffers
+	b = VIM::Buffer[n]		      # gets buffer "n"
+	cb = VIM::Buffer.current	      # gets the current buffer
+	w.height = lines		      # sets the window height
+	w.cursor = [row, col]		      # sets the window cursor position
+	pos = w.cursor			      # gets an array [row, col]
+	name = b.name			      # gets the buffer file name
+	line = b[n]			      # gets a line from the buffer
+	num = b.count			      # gets the number of lines
+	b[n] = str			      # sets a line in the buffer
+	b.delete(n)			      # deletes a line
+	b.append(n, str)		      # appends a line after n
+	line = VIM::Buffer.current.line       # gets the current line
+	num = VIM::Buffer.current.line_number # gets the current line number
+	VIM::Buffer.current.line = "test"     # sets the current line number
+<
+
+Module Functions:
+
+							*mruby-message*
+VIM::message({msg})
+	Displays the message {msg}.
+
+							*mruby-set_option*
+VIM::set_option({arg})
+	Sets a vim option.  {arg} can be any argument that the ":set" command
+	accepts.  Note that this means that no spaces are allowed in the
+	argument!  See |:set|.
+
+							*mruby-command*
+VIM::command({cmd})
+	Executes Ex command {cmd}.
+
+							*mruby-evaluate*
+VIM::evaluate({expr})
+	Evaluates {expr} using the vim internal expression evaluator (see
+	|expression|).  Returns the expression result as a string.
+	A |List| is turned into a string by joining the items and inserting
+	line breaks.
+
+==============================================================================
+3. VIM::Buffer objects					*mruby-buffer*
+
+VIM::Buffer objects represent vim buffers.
+
+Class Methods:
+
+current		Returns the current buffer object.
+count		Returns the number of buffers.
+self[{n}]	Returns the buffer object for the number {n}.  The first number
+		is 0.
+
+Methods:
+
+name		Returns the name of the buffer.
+number		Returns the number of the buffer.
+count		Returns the number of lines.
+length		Returns the number of lines.
+self[{n}]	Returns a line from the buffer. {n} is the line number.
+self[{n}] = {str}
+		Sets a line in the buffer. {n} is the line number.
+delete({n})	Deletes a line from the buffer. {n} is the line number.
+append({n}, {str})
+		Appends a line after the line {n}.
+line		Returns the current line of the buffer if the buffer is
+		active.
+line = {str}    Sets the current line of the buffer if the buffer is active.
+line_number     Returns the number of the current line if the buffer is
+		active.
+
+==============================================================================
+4. VIM::Window objects					*mruby-window*
+
+VIM::Window objects represent vim windows.
+
+Class Methods:
+
+current		Returns the current window object.
+count		Returns the number of windows.
+self[{n}]	Returns the window object for the number {n}.  The first number
+		is 0.
+
+Methods:
+
+buffer		Returns the buffer displayed in the window.
+height		Returns the height of the window.
+height = {n}	Sets the window height to {n}.
+width		Returns the width of the window.
+width = {n}	Sets the window width to {n}.
+cursor		Returns a [row, col] array for the cursor position.
+cursor = [{row}, {col}]
+		Sets the cursor position to {row} and {col}.
+
+==============================================================================
+5. Global variables					*mruby-globals*
+
+There are two global variables.
+
+__curwin		The current window object.
+__$curbuf		The current buffer object.
+
+==============================================================================
+6. Using mrbgems					*mruby-mrbgems*
+
+MRuby support CRuby like package system. But it's not dynamic loading packages.
+The dynamic loading package will not be provided by mruby official.
+
+  https://github.com/mattn/mruby-require
+
+This mrbgem provide dynamic loading packages. If you want to add new feature
+to mruby interface, you should build libmruby.a with this mrbgem. And call
+require in mruby:
+>
+	mruby << EOF
+	require 'mruby-env'
+	puts ENV["HOME"]
+	EOF
+<
+==============================================================================
+ vim:tw=78:ts=8:ft=help:norl:
diff -r ccbde540a714 runtime/doc/if_perl.txt
--- a/runtime/doc/if_perl.txt	Wed Apr 03 21:14:29 2013 +0200
+++ b/runtime/doc/if_perl.txt	Fri Apr 05 21:20:11 2013 +0900
@@ -253,8 +253,8 @@
        this will NOT work!
    EOF
    endif
-Instead, put the Perl/Python/Ruby/etc. command in a function and call that
-function: >
+Instead, put the Perl/Python/Ruby/MRuby/etc. command in a function and call
+that function: >
     if has('perl')
       function DefPerl()
 	perl << EOF
diff -r ccbde540a714 runtime/doc/index.txt
--- a/runtime/doc/index.txt	Wed Apr 03 21:14:29 2013 +0200
+++ b/runtime/doc/index.txt	Fri Apr 05 21:20:11 2013 +0900
@@ -1339,6 +1339,9 @@
 |:mkvimrc|	:mkv[imrc]	write current mappings and settings to a file
 |:mkview|	:mkvie[w]	write view of current window to a file
 |:mode|		:mod[e]		show or change the screen mode
+|:mruby|	:mrub[y]	execute MRuby command
+|:mrubydo|	:mrubyd[o]	execute MRuby command for each line
+|:mrubyfile|	:mrubyf[ile]	execute MRuby script file
 |:mzscheme|	:mz[scheme]	execute MzScheme command
 |:mzfile|	:mzf[ile]	execute MzScheme script file
 |:nbclose|	:nbc[lose]	close the current Netbeans session
diff -r ccbde540a714 src/Make_ming.mak
--- a/src/Make_ming.mak	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/Make_ming.mak	Fri Apr 05 21:20:11 2013 +0900
@@ -405,6 +405,12 @@
 endif
 endif
 
+ifdef MRUBY
+include $(MRUBY)/build/host/lib/libmruby.flags.mak
+CFLAGS += -DFEAT_MRUBY -I$(MRUBY)/include $(MRUBY_CFLAGS)
+MRUBYLIB = -L$(MRUBY)/build/host/lib -lmruby -lmruby_core $(MRUBY_LD_FLAGS) $(MRUBY_LIBS)
+endif
+
 ifdef PYTHON
 CFLAGS += -DFEAT_PYTHON 
 ifeq (yes, $(DYNAMIC_PYTHON))
@@ -575,6 +581,9 @@
 ifdef RUBY
 OBJ += $(OUTDIR)/if_ruby.o
 endif
+ifdef MRUBY
+OBJ += $(OUTDIR)/if_mruby.o
+endif
 ifdef TCL
 OBJ += $(OUTDIR)/if_tcl.o
 endif
@@ -685,7 +694,7 @@
 	$(CC) $(CFLAGS) -o uninstal.exe uninstal.c $(LIB)
 
 $(TARGET): $(OUTDIR) $(OBJ)
-	$(CC) $(CFLAGS) $(LFLAGS) -o $@ $(OBJ) $(LIB) -lole32 -luuid $(LUA_LIB) $(MZSCHEME_LIBDIR) $(MZSCHEME_LIB) $(PYTHONLIB) $(PYTHON3LIB) $(RUBYLIB)
+	$(CC) $(CFLAGS) $(LFLAGS) -o $@ $(OBJ) $(LIB) -lole32 -luuid $(LUA_LIB) $(MZSCHEME_LIBDIR) $(MZSCHEME_LIB) $(PYTHONLIB) $(PYTHON3LIB) $(RUBYLIB) $(MRUBYLIB)
 
 upx: exes
 	upx gvim.exe
@@ -758,6 +767,9 @@
 	$(CC) $(CFLAGS) -U_WIN32 -c -o $(OUTDIR)/if_ruby.o if_ruby.c
 endif
 
+$(OUTDIR)/if_mruby.o:	if_mruby.c $(INCL)
+	$(CC) -c $(CFLAGS) if_mruby.c -o $(OUTDIR)/if_mruby.o
+
 if_perl.c: if_perl.xs typemap
 	$(XSUBPP) -prototypes -typemap \
 	     $(PERLLIB)/ExtUtils/typemap if_perl.xs > $@
@@ -779,7 +791,7 @@
 	@echo 'char_u *default_vim_dir = (char_u *)"$(VIMRCLOC)";' >> pathdef.c
 	@echo 'char_u *default_vimruntime_dir = (char_u *)"$(VIMRUNTIMEDIR)";' >> pathdef.c
 	@echo 'char_u *all_cflags = (char_u *)"$(CC) $(CFLAGS)";' >> pathdef.c
-	@echo 'char_u *all_lflags = (char_u *)"$(CC) $(CFLAGS) $(LFLAGS) -o $(TARGET) $(LIB) -lole32 -luuid $(LUA_LIB) $(MZSCHEME_LIBDIR) $(MZSCHEME_LIB) $(PYTHONLIB) $(PYTHON3LIB) $(RUBYLIB)";' >> pathdef.c
+	@echo 'char_u *all_lflags = (char_u *)"$(CC) $(CFLAGS) $(LFLAGS) -o $(TARGET) $(LIB) -lole32 -luuid $(LUA_LIB) $(MZSCHEME_LIBDIR) $(MZSCHEME_LIB) $(PYTHONLIB) $(PYTHON3LIB) $(RUBYLIB) $(MRUBYLIB)";' >> pathdef.c
 	@echo 'char_u *compiled_user = (char_u *)"$(USERNAME)";' >> pathdef.c
 	@echo 'char_u *compiled_sys = (char_u *)"$(USERDOMAIN)";' >> pathdef.c
 else
@@ -789,7 +801,7 @@
 	@echo char_u *default_vim_dir = (char_u *)"$(VIMRCLOC)"; >> pathdef.c
 	@echo char_u *default_vimruntime_dir = (char_u *)"$(VIMRUNTIMEDIR)"; >> pathdef.c
 	@echo char_u *all_cflags = (char_u *)"$(CC) $(CFLAGS)"; >> pathdef.c
-	@echo char_u *all_lflags = (char_u *)"$(CC) $(CFLAGS) $(LFLAGS) -o $(TARGET) $(LIB) -lole32 -luuid $(LUA_LIB) $(MZSCHEME_LIBDIR) $(MZSCHEME_LIB) $(PYTHONLIB) $(PYTHON3LIB) $(RUBYLIB)"; >> pathdef.c
+	@echo char_u *all_lflags = (char_u *)"$(CC) $(CFLAGS) $(LFLAGS) -o $(TARGET) $(LIB) -lole32 -luuid $(LUA_LIB) $(MZSCHEME_LIBDIR) $(MZSCHEME_LIB) $(PYTHONLIB) $(PYTHON3LIB) $(RUBYLIB) $(MRUBYLIB)"; >> pathdef.c
 	@echo char_u *compiled_user = (char_u *)"$(USERNAME)"; >> pathdef.c
 	@echo char_u *compiled_sys = (char_u *)"$(USERDOMAIN)"; >> pathdef.c
 endif
diff -r ccbde540a714 src/Make_mvc.mak
--- a/src/Make_mvc.mak	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/Make_mvc.mak	Fri Apr 05 21:20:11 2013 +0900
@@ -69,6 +69,9 @@
 #	    You must set RUBY_API_VER to RUBY_VER_LONG.
 #	    Don't set ruby API version to RUBY_VER like 191.
 #
+#	MRuby interface:
+#	  MRUBY=[Path to Ruby directory]
+#
 #	Tcl interface:
 #	  TCL=[Path to Tcl directory]
 #	  DYNAMIC_TCL=yes (to load the Tcl DLL dynamically)
@@ -187,6 +190,9 @@
 !ifdef RUBY
 OBJDIR = $(OBJDIR)R
 !endif
+!ifdef MRUBY
+OBJDIR = $(OBJDIR)MR
+!endif
 !ifdef MZSCHEME
 OBJDIR = $(OBJDIR)Z
 !endif
@@ -883,6 +889,18 @@
 !endif # RUBY
 
 #
+# Support MRuby interface
+#
+!ifdef MRUBY
+# TODO: libmruby.flags.mak doesn't need on MSVC.
+#!include $(MRUBY)/build/host/lib/libmruby.flags.mak
+CFLAGS = $(CFLAGS) -DFEAT_MRUBY /I $(MRUBY)/include
+MRUBY_OBJ = $(OUTDIR)\if_mruby.obj
+MRUBY_INC = /I "$(MRUBY)\include"
+MRUBY_LIB = /LIBPATH:"$(MRUBY)\build\host\lib" libmruby.lib
+!endif #MRUBY
+
+#
 # Support PostScript printing
 #
 !if "$(POSTSCRIPT)" == "yes"
@@ -926,7 +944,7 @@
 LINKARGS1 = $(linkdebug) $(conflags)
 LINKARGS2 = $(CON_LIB) $(GUI_LIB) $(LIBC) $(OLE_LIB)  user32.lib $(SNIFF_LIB) \
 		$(LUA_LIB) $(MZSCHEME_LIB) $(PERL_LIB) $(PYTHON_LIB) $(PYTHON3_LIB) $(RUBY_LIB) \
-		$(TCL_LIB) $(NETBEANS_LIB) $(XPM_LIB) $(LINK_PDB)
+		$(MRUBY_LIB) $(TCL_LIB) $(NETBEANS_LIB) $(XPM_LIB) $(LINK_PDB)
 
 # Report link time code generation progress if used. 
 !ifdef NODEBUG
@@ -942,12 +960,12 @@
 
 $(VIM).exe: $(OUTDIR) $(OBJ) $(GUI_OBJ) $(OLE_OBJ) $(OLE_IDL) $(MZSCHEME_OBJ) \
 		$(LUA_OBJ) $(PERL_OBJ) $(PYTHON_OBJ) $(PYTHON3_OBJ) $(RUBY_OBJ) $(TCL_OBJ) \
-		$(SNIFF_OBJ) $(CSCOPE_OBJ) $(NETBEANS_OBJ) $(XPM_OBJ) \
+		$(MRUBY_OBJ) $(SNIFF_OBJ) $(CSCOPE_OBJ) $(NETBEANS_OBJ) $(XPM_OBJ) \
 		version.c version.h
 	$(CC) $(CFLAGS) version.c
 	$(link) $(LINKARGS1) -out:$(VIM).exe $(OBJ) $(GUI_OBJ) $(OLE_OBJ) \
 		$(LUA_OBJ) $(MZSCHEME_OBJ) $(PERL_OBJ) $(PYTHON_OBJ) $(PYTHON3_OBJ) $(RUBY_OBJ) \
-		$(TCL_OBJ) $(SNIFF_OBJ) $(CSCOPE_OBJ) $(NETBEANS_OBJ) \
+		$(MRUBY_OBJ) $(TCL_OBJ) $(SNIFF_OBJ) $(CSCOPE_OBJ) $(NETBEANS_OBJ) \
 		$(XPM_OBJ) $(OUTDIR)\version.obj $(LINKARGS2)
 
 $(VIM): $(VIM).exe
@@ -1114,6 +1132,9 @@
 $(OUTDIR)/if_ruby.obj: $(OUTDIR) if_ruby.c  $(INCL)
 	$(CC) $(CFLAGS) $(RUBY_INC) if_ruby.c
 
+$(OUTDIR)/if_mruby.obj: $(OUTDIR) if_mruby.c  $(INCL)
+	$(CC) $(CFLAGS) $(MRUBY_INC) if_mruby.c
+
 $(OUTDIR)/if_sniff.obj:	$(OUTDIR) if_sniff.c  $(INCL)
 	$(CC) $(CFLAGS) if_sniff.c
 
diff -r ccbde540a714 src/Makefile
--- a/src/Makefile	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/Makefile	Fri Apr 05 21:20:11 2013 +0900
@@ -44,6 +44,7 @@
 #		--enable-python3interp	for Python3 interpreter
 #		--enable-pythoninterp	for Python interpreter
 #		--enable-rubyinterp	for Ruby interpreter
+#		--enable-mrubyinterp	for MRuby interpreter
 #		--enable-tclinterp	for Tcl interpreter
 #		--enable-cscope		for Cscope interface
 #	- Uncomment one of the lines with --with-features= to enable a set of
@@ -432,6 +433,9 @@
 #CONF_OPT_RUBY = --enable-rubyinterp=dynamic
 #CONF_OPT_RUBY = --enable-rubyinterp --with-ruby-command=ruby1.9.1
 
+# MRUBY
+#CONF_OPT_MRUBY = --enable-rubyinterp
+
 # TCL
 # Uncomment this when you want to include the Tcl interface.
 #CONF_OPT_TCL = --enable-tclinterp
@@ -1339,7 +1343,7 @@
 # with "-E".
 OSDEF_CFLAGS = $(PRE_DEFS) $(POST_DEFS)
 
-LINT_CFLAGS = -DLINT -I. $(PRE_DEFS) $(POST_DEFS) $(RUBY_CFLAGS) $(LUA_CFLAGS) $(PERL_CFLAGS) $(PYTHON_CFLAGS) $(PYTHON3_CFLAGS) -Dinline= -D__extension__= -Dalloca=alloca
+LINT_CFLAGS = -DLINT -I. $(PRE_DEFS) $(POST_DEFS) $(RUBY_CFLAGS) $(MRUBY_CFLAGS) $(LUA_CFLAGS) $(PERL_CFLAGS) $(PYTHON_CFLAGS) $(PYTHON3_CFLAGS) -Dinline= -D__extension__= -Dalloca=alloca
 
 LINT_EXTRA = -DUSE_SNIFF -DHANGUL_INPUT -D"__attribute__(x)="
 
@@ -1364,6 +1368,7 @@
 	   $(PYTHON3_LIBS) \
 	   $(TCL_LIBS) \
 	   $(RUBY_LIBS) \
+	   $(MRUBY_LIBS) \
 	   $(PROFILE_LIBS) \
 	   $(LEAK_LIBS)
 
@@ -1477,6 +1482,7 @@
 	$(PYTHON_SRC) $(PYTHON3_SRC) \
 	$(TCL_SRC) \
 	$(RUBY_SRC) \
+	$(MRUBY_SRC) \
 	$(SNIFF_SRC) \
 	$(WORKSHOP_SRC) \
 	$(WSDEBUG_SRC)
@@ -1484,7 +1490,7 @@
 TAGS_SRC = *.c *.cpp if_perl.xs
 
 EXTRA_SRC = hangulin.c if_lua.c if_mzsch.c auto/if_perl.c if_perlsfio.c \
-	    if_python.c if_python3.c if_tcl.c if_ruby.c if_sniff.c \
+	    if_python.c if_python3.c if_tcl.c if_ruby.c if_mruby.c if_sniff.c \
 	    gui_beval.c workshop.c wsdebug.c integration.c netbeans.c
 
 # Unittest files
@@ -1563,6 +1569,7 @@
 	$(PYTHON3_OBJ) \
 	$(TCL_OBJ) \
 	$(RUBY_OBJ) \
+	$(MRUBY_OBJ) \
 	$(OS_EXTRA_OBJ) \
 	$(WORKSHOP_OBJ) \
 	$(NETBEANS_OBJ) \
@@ -1599,6 +1606,7 @@
 	if_python.pro \
 	if_python3.pro \
 	if_ruby.pro \
+	if_mruby.pro \
 	main.pro \
 	mark.pro \
 	memfile.pro \
@@ -1661,7 +1669,7 @@
 		./configure $(CONF_OPT_GUI) $(CONF_OPT_X) $(CONF_OPT_XSMP) \
 		$(CONF_OPT_DARWIN) $(CONF_OPT_FAIL) \
 		$(CONF_OPT_PERL) $(CONF_OPT_PYTHON) $(CONF_OPT_PYTHON3) \
-		$(CONF_OPT_TCL) $(CONF_OPT_RUBY) $(CONF_OPT_NLS) \
+		$(CONF_OPT_TCL) $(CONF_OPT_RUBY) $(CONF_OPT_MRUBY) $(CONF_OPT_NLS) \
 		$(CONF_OPT_CSCOPE) $(CONF_OPT_MULTIBYTE) $(CONF_OPT_INPUT) \
 		$(CONF_OPT_OUTPUT) $(CONF_OPT_GPM) $(CONF_OPT_WORKSHOP) \
 		$(CONF_OPT_SNIFF) $(CONF_OPT_FEAT) $(CONF_TERM_LIB) \
@@ -2580,6 +2588,9 @@
 objects/if_ruby.o: if_ruby.c
 	$(CCC) $(RUBY_CFLAGS) -o $@ if_ruby.c
 
+objects/if_mruby.o: if_mruby.c
+	$(CCC) $(MRUBY_CFLAGS) -o $@ if_mruby.c
+
 objects/if_sniff.o: if_sniff.c
 	$(CCC) -o $@ if_sniff.c
 
@@ -3108,6 +3119,10 @@
  ascii.h keymap.h term.h macros.h option.h structs.h regexp.h gui.h \
  gui_beval.h proto/gui_beval.pro ex_cmds.h proto.h globals.h farsi.h \
  arabic.h version.h
+objects/if_mruby.o: if_mruby.c auto/config.h vim.h feature.h os_unix.h auto/osdef.h \
+ ascii.h keymap.h term.h macros.h option.h structs.h regexp.h gui.h \
+ gui_beval.h proto/gui_beval.pro ex_cmds.h proto.h globals.h farsi.h \
+ arabic.h version.h
 objects/if_sniff.o: if_sniff.c vim.h auto/config.h feature.h os_unix.h \
  auto/osdef.h ascii.h keymap.h term.h macros.h option.h structs.h \
  regexp.h gui.h gui_beval.h proto/gui_beval.pro ex_cmds.h proto.h \
diff -r ccbde540a714 src/buffer.c
--- a/src/buffer.c	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/buffer.c	Fri Apr 05 21:20:11 2013 +0900
@@ -666,6 +666,9 @@
 #ifdef FEAT_RUBY
     ruby_buffer_free(buf);
 #endif
+#ifdef FEAT_MRUBY
+    mruby_buffer_free(buf);
+#endif
 #ifdef FEAT_AUTOCMD
     aubuflocal_remove(buf);
 #endif
diff -r ccbde540a714 src/config.aap.in
--- a/src/config.aap.in	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/config.aap.in	Fri Apr 05 21:20:11 2013 +0900
@@ -73,6 +73,12 @@
 RUBY_CFLAGS	= @RUBY_CFLAGS@
 RUBY_LIBS	= @RUBY_LIBS@
 
+MRUBY_SRC	= @MRUBY_SRC@
+MRUBY_OBJ	= @MRUBY_OBJ@
+MRUBY_PRO	= @MRUBY_PRO@
+MRUBY_CFLAGS	= @MRUBY_CFLAGS@
+MRUBY_LIBS	= @MRUBY_LIBS@
+
 SNIFF_SRC	= @SNIFF_SRC@
 SNIFF_OBJ	= @SNIFF_OBJ@
 
diff -r ccbde540a714 src/config.h.in
--- a/src/config.h.in	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/config.h.in	Fri Apr 05 21:20:11 2013 +0900
@@ -356,6 +356,9 @@
 /* Define for linking via dlopen() or LoadLibrary() */
 #undef DYNAMIC_RUBY
 
+/* Define if you want to include the MRuby interpreter. */
+#undef FEAT_MRUBY
+
 /* Define if you want to include the Tcl interpreter. */
 #undef FEAT_TCL
 
diff -r ccbde540a714 src/config.mk.in
--- a/src/config.mk.in	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/config.mk.in	Fri Apr 05 21:20:11 2013 +0900
@@ -96,6 +96,12 @@
 RUBY_CFLAGS	= @RUBY_CFLAGS@
 RUBY_LIBS	= @RUBY_LIBS@
 
+MRUBY_SRC	= @MRUBY_SRC@
+MRUBY_OBJ	= @MRUBY_OBJ@
+MRUBY_PRO	= @MRUBY_PRO@
+MRUBY_CFLAGS	= @MRUBY_CFLAGS@
+MRUBY_LIBS	= @MRUBY_LIBS@
+
 SNIFF_SRC	= @SNIFF_SRC@
 SNIFF_OBJ	= @SNIFF_OBJ@
 
diff -r ccbde540a714 src/configure.in
--- a/src/configure.in	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/configure.in	Fri Apr 05 21:20:11 2013 +0900
@@ -1540,6 +1540,32 @@
 AC_SUBST(RUBY_CFLAGS)
 AC_SUBST(RUBY_LIBS)
 
+AC_MSG_CHECKING(--enable-mrubyinterp argument)
+AC_ARG_ENABLE(mrubyinterp,
+	[  --enable-mrubyinterp[=OPTS]     Include MRuby interpreter.  [default=no] [OPTS=no/yes/dynamic]], ,
+	[enable_mrubyinterp="no"])
+AC_MSG_RESULT($enable_mrubyinterp)
+if test "$enable_mrubyinterp" = "yes"; then
+  if test "x$MRUBY_ROOT" != "x" -a -f "$MRUBY_ROOT/build/host/lib/libmruby.flags.mak"; then
+    MRUBY_CFLAGS=`grep MRUBY_CFLAGS $MRUBY_ROOT/build/host/lib/libmruby.flags.mak | sed 's/MRUBY_CFLAGS\s*=\s*//'`
+    MRUBY_LIBS=`grep MRUBY_LIBS $MRUBY_ROOT/build/host/lib/libmruby.flags.mak | sed 's/MRUBY_LIBS\s*=\s*//'`
+    MRUBY_LIBS="$MRUBY_LIBS $MRUBY_ROOT/build/host/lib/libmruby.a $MRUBY_ROOT/build/host/lib/libmruby_core.a"
+    MRUBY_SRC="if_mruby.c"
+    MRUBY_OBJ="objects/if_mruby.o"
+    MRUBY_PRO="if_mruby.pro"
+    AC_DEFINE(FEAT_MRUBY)
+  else
+    AC_MSG_ERROR(not found; disabling MRuby)
+  fi
+else
+  AC_MSG_ERROR(not found; disabling MRuby)
+fi
+AC_SUBST(MRUBY_SRC)
+AC_SUBST(MRUBY_OBJ)
+AC_SUBST(MRUBY_PRO)
+AC_SUBST(MRUBY_CFLAGS)
+AC_SUBST(MRUBY_LIBS)
+
 AC_MSG_CHECKING(--enable-cscope argument)
 AC_ARG_ENABLE(cscope,
 	[  --enable-cscope         Include cscope interface.], ,
diff -r ccbde540a714 src/eval.c
--- a/src/eval.c	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/eval.c	Fri Apr 05 21:20:11 2013 +0900
@@ -6026,8 +6026,9 @@
     return item1 == NULL && item2 == NULL;
 }
 
-#if defined(FEAT_RUBY) || defined(FEAT_PYTHON) || defined(FEAT_PYTHON3) \
-	|| defined(FEAT_MZSCHEME) || defined(FEAT_LUA) || defined(PROTO)
+#if defined(FEAT_RUBY) || defined(FEAT_MRUBY) || defined(FEAT_PYTHON) || \
+    defined(FEAT_PYTHON3) || defined(FEAT_MZSCHEME) || defined(FEAT_LUA) || \
+    defined(PROTO)
 /*
  * Return the dictitem that an entry in a hashtable points to.
  */
@@ -12377,6 +12378,9 @@
 #if defined(FEAT_RUBY) && !defined(DYNAMIC_RUBY)
 	"ruby",
 #endif
+#if defined(FEAT_MRUBY)
+	"mruby",
+#endif
 #ifdef FEAT_SCROLLBIND
 	"scrollbind",
 #endif
diff -r ccbde540a714 src/ex_cmds.h
--- a/src/ex_cmds.h	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/ex_cmds.h	Fri Apr 05 21:20:11 2013 +0900
@@ -619,6 +619,12 @@
 			BANG|FILE1|TRLBAR),
 EX(CMD_mode,		"mode",		ex_mode,
 			WORD1|TRLBAR|CMDWIN),
+EX(CMD_mruby,		"mruby",	ex_mruby,
+			RANGE|EXTRA|NEEDARG|CMDWIN),
+EX(CMD_mrubydo,		"mrubydo",	ex_mrubydo,
+			RANGE|DFLALL|EXTRA|NEEDARG|CMDWIN),
+EX(CMD_mrubyfile,	"mrubyfile",	ex_mrubyfile,
+			RANGE|FILE1|NEEDARG|CMDWIN),
 EX(CMD_mzscheme,	"mzscheme",	ex_mzscheme,
 			RANGE|EXTRA|DFLALL|NEEDARG|CMDWIN|SBOXOK),
 EX(CMD_mzfile,		"mzfile",	ex_mzfile,
diff -r ccbde540a714 src/ex_docmd.c
--- a/src/ex_docmd.c	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/ex_docmd.c	Fri Apr 05 21:20:11 2013 +0900
@@ -134,6 +134,7 @@
 	|| !defined(FEAT_PYTHON) || !defined(FEAT_PYTHON3) \
 	|| !defined(FEAT_TCL) \
 	|| !defined(FEAT_RUBY) \
+	|| !defined(FEAT_MRUBY) \
 	|| !defined(FEAT_LUA) \
 	|| !defined(FEAT_MZSCHEME)
 # define HAVE_EX_SCRIPT_NI
@@ -284,6 +285,11 @@
 # define ex_rubydo		ex_ni
 # define ex_rubyfile		ex_ni
 #endif
+#ifndef FEAT_MRUBY
+# define ex_mruby		ex_script_ni
+# define ex_mrubydo		ex_ni
+# define ex_mrubyfile		ex_ni
+#endif
 #ifndef FEAT_SNIFF
 # define ex_sniff		ex_ni
 #endif
@@ -2593,6 +2599,7 @@
 	    case CMD_return:
 	    case CMD_rightbelow:
 	    case CMD_ruby:
+	    case CMD_mruby:
 	    case CMD_silent:
 	    case CMD_smagic:
 	    case CMD_snomagic:
diff -r ccbde540a714 src/if_mruby.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/if_mruby.c	Fri Apr 05 21:20:11 2013 +0900
@@ -0,0 +1,812 @@
+/* vi:set ts=8 sts=4 sw=4:
+ *
+ * VIM - Vi IMproved    by Bram Moolenaar
+ *
+ * MRuby interface by Yasuhiro Matsumoto
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ * See README.txt for an overview of the Vim source code.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "auto/config.h"
+#endif
+
+#include <stdio.h>
+#include <string.h>
+
+#include <mruby.h>
+#include <mruby/compile.h>
+#include <mruby/class.h>
+#include <mruby/proc.h>
+#include <mruby/data.h>
+#include <mruby/array.h>
+#include <mruby/hash.h>
+#include <mruby/string.h>
+#include <mruby/variable.h>
+
+#include "vim.h"
+#include "version.h"
+
+static mrb_state* mrb = NULL;
+static struct mrbc_context* context = NULL;
+static mrb_value objtbl;
+static struct RObject* mrb_stdout;
+
+static struct RClass* mVIM;
+static struct RClass* cBuffer;
+static struct RClass* cVimWindow;
+static struct RClass* eDeletedBufferError;
+static struct RClass* eDeletedWindowError;
+
+static int ensure_mruby_initialized(void);
+static void error_print();
+static void mruby_io_init(void);
+static void mruby_vim_init(void);
+
+static void
+mrb_vim_free(mrb_state *mrb, void *p) {
+}
+
+static const struct mrb_data_type VIM_Window_type = {
+  "VIM::Window", mrb_vim_free,
+};
+
+static const struct mrb_data_type VIM_Buffer_type = {
+  "VIM::Buffer", mrb_vim_free,
+};
+
+void
+mruby_end()
+{
+  if (context) {
+    mrbc_context_free(mrb, context);
+    context = NULL;
+  }
+  if (mrb) {
+    mrb_close(mrb);
+    mrb = NULL;
+  }
+}
+
+static mrb_value
+eval_string(const char *str)
+{
+  mrb_value result;
+  struct mrb_parser_state *parser;
+  int ai = mrb_gc_arena_save(mrb);
+  parser = mrb_parser_new(mrb);
+  parser->s = str;
+  parser->send = str + strlen(str);
+  parser->lineno = 1;
+  mrb_parser_parse(parser, context);
+  result = mrb_nil_value();
+  if (0 < parser->nerr) {
+    MSG(parser->error_buffer[0].message);
+  } else {
+    int n = mrb_generate_code(mrb, parser);
+    result = mrb_run(mrb, mrb_proc_new(mrb, mrb->irep[n]), mrb_top_self(mrb));
+  }
+  mrb_gc_arena_restore(mrb, ai);
+  mrb_parser_free(parser);
+  return result;
+}
+
+void
+ex_mruby(exarg_T *eap)
+{
+  char *script = NULL;
+
+  script = (char *)script_get(eap, eap->arg);
+  if (!eap->skip && ensure_mruby_initialized()) {
+    eval_string(script ? script : (char *)eap->arg);
+    if (mrb->exc)
+      error_print();
+  }
+  vim_free(script);
+}
+
+void ex_mrubydo(exarg_T *eap)
+{
+  linenr_T i;
+
+  if (ensure_mruby_initialized())
+  {
+    if (u_save(eap->line1 - 1, eap->line2 + 1) != OK)
+      return;
+    for (i = eap->line1; i <= eap->line2; i++) {
+      mrb_value line;
+
+      line = mrb_str_new_cstr(mrb, (char *)ml_get(i));
+      mrb_vm_const_set(mrb, mrb_intern(mrb, "$_"), line);
+      line = eval_string((char *) eap->arg);
+      if (mrb->exc) {
+	error_print();
+	break;
+      }
+      line = mrb_vm_const_get(mrb, mrb_intern(mrb, "$_"));
+      if (!mrb_nil_p(line)) {
+	if (mrb_type(line) != MRB_TT_STRING) {
+	  EMSG(_("E265: $_ must be an instance of String"));
+	  return;
+	}
+	ml_replace(i, (char_u *) mrb_string_value_ptr(mrb, line), 1);
+	changed();
+#ifdef SYNTAX_HL
+	syn_changed(i); /* recompute syntax hl. for this line */
+#endif
+      }
+    }
+    check_cursor();
+    update_curbuf(NOT_VALID);
+  }
+}
+
+void ex_mrubyfile(exarg_T *eap)
+{
+  if (ensure_mruby_initialized())
+  {
+    FILE* fp = fopen((char *) eap->arg, "rb");
+    if (fp) {
+      mrbc_filename(mrb, context, (char *) eap->arg);
+      mrb_load_file_cxt(mrb, fp, context);
+      fclose(fp);
+      if (mrb->exc)
+        error_print();
+    } else {
+      EMSG("Cannot open file");
+    }
+
+  }
+}
+
+void mruby_buffer_free(buf_T *buf)
+{
+  if (buf->b_mruby_ref)
+  {
+    mrb_funcall(mrb, objtbl, "[]=", 2,
+      mrb_fixnum_value(mrb_obj_id(*(mrb_value*) buf->b_mruby_ref)),
+      mrb_nil_value());
+    ((struct RData*) buf->b_mruby_ref)->data = NULL;
+  }
+}
+
+void mruby_window_free(win_T *win)
+{
+  if (win->w_mruby_ref)
+  {
+    mrb_funcall(mrb, objtbl, "[]=", 2,
+      mrb_fixnum_value(mrb_obj_id(*(mrb_value*) win->w_mruby_ref)),
+      mrb_nil_value());
+    ((struct RData*) win->w_mruby_ref)->data = NULL;
+  }
+}
+
+static int ensure_mruby_initialized(void)
+{
+  if (!mrb)
+  {
+    mrb = mrb_open();
+    if (mrb) {
+      context = mrbc_context_new(mrb);
+      context->capture_errors = 1;
+      mruby_io_init();
+      mruby_vim_init();
+    }
+  }
+  return mrb != NULL;
+}
+
+static void
+error_print()
+{
+  EMSG(mrb_string_value_ptr(mrb, mrb_obj_value(mrb->exc)));
+  mrb->exc = 0;
+}
+
+static mrb_value vim_message(mrb_state *mrb, mrb_value self)
+{
+  char *buff, *p;
+  mrb_value str;
+  int ai = mrb_gc_arena_save(mrb);
+
+  mrb_get_args(mrb, "o", &str);
+
+  str = mrb_obj_as_string(mrb, str);
+  if (RSTRING_LEN(str) > 0) {
+    MSG(RSTRING_PTR(str));
+  } else {
+    MSG("");
+  }
+  mrb_gc_arena_restore(mrb, ai);
+  return mrb_nil_value();
+}
+
+static mrb_value vim_set_option(mrb_state* mrb, mrb_value self)
+{
+  mrb_value str;
+  mrb_get_args(mrb, "S", &str);
+  do_set((char_u *) mrb_string_value_ptr(mrb, str), 0);
+  update_screen(NOT_VALID);
+  return mrb_nil_value();
+}
+
+static mrb_value vim_command(mrb_state* mrb, mrb_value self)
+{
+  mrb_value str;
+  mrb_get_args(mrb, "S", &str);
+  do_cmdline_cmd((char_u *) mrb_string_value_ptr(mrb, str));
+  return mrb_nil_value();
+}
+
+#ifdef FEAT_EVAL
+static mrb_value vim_to_mruby(typval_T *tv)
+{
+  mrb_value result = mrb_nil_value();
+
+  if (tv->v_type == VAR_STRING)
+  {
+    result = mrb_str_new_cstr(mrb, tv->vval.v_string == NULL
+      ? "" : (char *)(tv->vval.v_string));
+  }
+  else if (tv->v_type == VAR_NUMBER)
+  {
+    result = mrb_fixnum_value(tv->vval.v_number);
+  }
+# ifdef FEAT_FLOAT
+  else if (tv->v_type == VAR_FLOAT)
+  {
+    result = mrb_float_value(tv->vval.v_float);
+  }
+# endif
+  else if (tv->v_type == VAR_LIST)
+  {
+    list_T      *list = tv->vval.v_list;
+    listitem_T  *curr;
+
+    result = mrb_ary_new(mrb);
+
+    if (list != NULL)
+    {
+      for (curr = list->lv_first; curr != NULL; curr = curr->li_next)
+      {
+	mrb_ary_push(mrb, result, vim_to_mruby(&curr->li_tv));
+      }
+    }
+  }
+  else if (tv->v_type == VAR_DICT)
+  {
+    result = mrb_hash_new(mrb);
+
+    if (tv->vval.v_dict != NULL)
+    {
+      hashtab_T   *ht = &tv->vval.v_dict->dv_hashtab;
+      long_u      todo = ht->ht_used;
+      hashitem_T  *hi;
+      dictitem_T  *di;
+
+      for (hi = ht->ht_array; todo > 0; ++hi)
+      {
+	if (!HASHITEM_EMPTY(hi))
+	{
+	  --todo;
+
+	  di = dict_lookup(hi);
+	  mrb_funcall(mrb, result, "[]=", 2,
+	    mrb_str_new_cstr(mrb, (char *)hi->hi_key),
+	    vim_to_mruby(&di->di_tv));
+	}
+      }
+    }
+  } /* else return mrb_nil_value(); */
+
+  return result;
+}
+#endif
+
+static mrb_value vim_evaluate(mrb_state* mrb, mrb_value self)
+{
+#ifdef FEAT_EVAL
+  typval_T    *tv;
+  mrb_value       result;
+  mrb_value str;
+  mrb_get_args(mrb, "S", &str);
+
+  tv = eval_expr((char_u *) mrb_string_value_ptr(mrb, str), NULL);
+  if (tv == NULL)
+  {
+    return mrb_nil_value();
+  }
+  result = vim_to_mruby(tv);
+
+  free_tv(tv);
+
+  return result;
+#else
+  return mrb_nil_value();
+#endif
+}
+
+static mrb_value buffer_new(buf_T *buf)
+{
+  if (buf->b_mruby_ref)
+  {
+    return mrb_obj_value((struct RData*) buf->b_mruby_ref);
+  }
+  else
+  {
+    struct RData* obj = mrb_data_object_alloc(mrb, cBuffer, buf, &VIM_Buffer_type);
+    buf->b_mruby_ref = (void *) obj;
+    mrb_funcall(mrb, objtbl, "[]=", 2,
+      mrb_fixnum_value(mrb_obj_id(mrb_obj_value(obj))),
+      mrb_obj_value(obj));
+    return mrb_obj_value(obj);
+  }
+}
+
+static buf_T *get_buf(mrb_value obj)
+{
+  buf_T *buf;
+
+  Data_Get_Struct(mrb, obj, &VIM_Buffer_type, buf);
+  if (buf == NULL)
+    mrb_raise(mrb, eDeletedBufferError, "attempt to refer to deleted buffer");
+  return buf;
+}
+
+static mrb_value buffer_s_current(mrb_state* mrb, mrb_value self)
+{
+  return buffer_new(curbuf);
+}
+
+static mrb_value buffer_s_count(mrb_state* mrb, mrb_value self)
+{
+  buf_T *b;
+  int n = 0;
+
+  for (b = firstbuf; b != NULL; b = b->b_next)
+  {
+    /*  Deleted buffers should not be counted
+     *    SegPhault - 01/07/05 */
+    if (b->b_p_bl)
+      n++;
+  }
+
+  return mrb_fixnum_value(n);
+}
+
+static mrb_value buffer_s_aref(mrb_state* mrb, mrb_value self)
+{
+  mrb_value num;
+  buf_T *b;
+  int n;
+  
+  mrb_get_args(mrb, "i", &num);
+  n = mrb_fixnum(num);
+
+  for (b = firstbuf; b != NULL; b = b->b_next)
+  {
+    /*  Deleted buffers should not be counted
+     *    SegPhault - 01/07/05 */
+    if (!b->b_p_bl)
+      continue;
+
+    if (n == 0)
+      return buffer_new(b);
+
+    n--;
+  }
+  return mrb_nil_value();
+}
+
+static mrb_value buffer_name(mrb_state* mrb, mrb_value self)
+{
+  buf_T *buf = get_buf(self);
+
+  return buf->b_ffname ? mrb_str_new_cstr(mrb, (char *)buf->b_ffname) : mrb_nil_value();
+}
+
+static mrb_value buffer_number(mrb_state* mrb, mrb_value self)
+{
+  buf_T *buf = get_buf(self);
+
+  return mrb_fixnum_value(buf->b_fnum);
+}
+
+static mrb_value buffer_count(mrb_state* mrb, mrb_value self)
+{
+  buf_T *buf = get_buf(self);
+
+  return mrb_fixnum_value(buf->b_ml.ml_line_count);
+}
+
+static mrb_value get_buffer_line(buf_T *buf, linenr_T n)
+{
+  if (n <= 0 || n > buf->b_ml.ml_line_count)
+    mrb_raisef(mrb, E_INDEX_ERROR, "line number %ld out of range", (long)n);
+  return mrb_str_new_cstr(mrb, (char *)ml_get_buf(buf, n, FALSE));
+}
+
+static mrb_value buffer_aref(mrb_state* mrb, mrb_value self)
+{
+  buf_T *buf = get_buf(self);
+
+  if (buf != NULL) {
+    mrb_value num;
+    mrb_get_args(mrb, "i", &num);
+    return get_buffer_line(buf, (linenr_T)mrb_fixnum(num));
+  }
+  return mrb_nil_value(); /* For stop warning */
+}
+
+static mrb_value set_buffer_line(buf_T *buf, linenr_T n, mrb_value str)
+{
+  char    *line = mrb_string_value_ptr(mrb, str);
+  aco_save_T    aco;
+
+  if (n > 0 && n <= buf->b_ml.ml_line_count && line != NULL)
+  {
+    /* set curwin/curbuf for "buf" and save some things */
+    aucmd_prepbuf(&aco, buf);
+
+    if (u_savesub(n) == OK) {
+      ml_replace(n, (char_u *)line, TRUE);
+      changed();
+#ifdef SYNTAX_HL
+      syn_changed(n); /* recompute syntax hl. for this line */
+#endif
+    }
+
+    /* restore curwin/curbuf and a few other things */
+    aucmd_restbuf(&aco);
+    /* Careful: autocommands may have made "buf" invalid! */
+
+    update_curbuf(NOT_VALID);
+  }
+  else
+  {
+    mrb_raisef(mrb, E_INDEX_ERROR, "line number %ld out of range", (long)n);
+  }
+  return str;
+}
+
+static mrb_value buffer_aset(mrb_state* mrb, mrb_value self)
+{
+  buf_T *buf = get_buf(self);
+  mrb_value num, str;
+
+  mrb_get_args(mrb, "iS", &num, &str);
+  if (buf != NULL) {
+    return set_buffer_line(buf, (linenr_T)mrb_fixnum(num), str);
+  }
+  return str;
+}
+
+static mrb_value buffer_delete(mrb_state* mrb, mrb_value self)
+{
+  buf_T    *buf = get_buf(self);
+  mrb_value num;
+  long    n;
+  aco_save_T    aco;
+
+  mrb_get_args(mrb, "i", &num);
+  n = mrb_fixnum(num);
+  if (n > 0 && n <= buf->b_ml.ml_line_count)
+  {
+    /* set curwin/curbuf for "buf" and save some things */
+    aucmd_prepbuf(&aco, buf);
+
+    if (u_savedel(n, 1) == OK) {
+      ml_delete(n, 0);
+
+      /* Changes to non-active buffers should properly refresh
+       *   SegPhault - 01/09/05 */
+      deleted_lines_mark(n, 1L);
+
+      changed();
+    }
+
+    /* restore curwin/curbuf and a few other things */
+    aucmd_restbuf(&aco);
+    /* Careful: autocommands may have made "buf" invalid! */
+
+    update_curbuf(NOT_VALID);
+  }
+  else
+  {
+    mrb_raisef(mrb, E_INDEX_ERROR, "line number %ld out of range", n);
+  }
+  return mrb_nil_value();
+}
+
+static mrb_value buffer_append(mrb_state* mrb, mrb_value self)
+{
+  buf_T    *buf = get_buf(self);
+  mrb_value num, str;
+  char    *line;
+  long    n;
+  aco_save_T    aco;
+
+  mrb_get_args(mrb, "iS", &num, &str);
+  line = mrb_string_value_ptr(mrb, str);
+  n = mrb_fixnum(num);
+  if (line == NULL)
+  {
+    mrb_raise(mrb, E_INDEX_ERROR, "NULL line");
+  }
+  else if (n >= 0 && n <= buf->b_ml.ml_line_count)
+  {
+    /* set curwin/curbuf for "buf" and save some things */
+    aucmd_prepbuf(&aco, buf);
+
+    if (u_inssub(n + 1) == OK) {
+      ml_append(n, (char_u *) line, (colnr_T) 0, FALSE);
+
+      /*  Changes to non-active buffers should properly refresh screen
+       *    SegPhault - 12/20/04 */
+      appended_lines_mark(n, 1L);
+
+      changed();
+    }
+
+    /* restore curwin/curbuf and a few other things */
+    aucmd_restbuf(&aco);
+    /* Careful: autocommands may have made "buf" invalid! */
+
+    update_curbuf(NOT_VALID);
+  }
+  else
+  {
+    mrb_raisef(mrb, E_INDEX_ERROR, "line number %ld out of range", n);
+  }
+  return str;
+}
+
+static mrb_value window_new(win_T *win)
+{
+  if (win->w_mruby_ref)
+  {
+    return mrb_obj_value((struct RData*) win->w_mruby_ref);
+  }
+  else
+  {
+    struct RData* obj = mrb_data_object_alloc(mrb, cVimWindow, win, &VIM_Window_type);
+    win->w_mruby_ref = (void *) obj;
+    mrb_funcall(mrb, objtbl, "[]=", 2,
+      mrb_fixnum_value(mrb_obj_id(mrb_obj_value(obj))),
+      mrb_obj_value(obj));
+    return mrb_obj_value(obj);
+  }
+}
+
+static win_T *get_win(mrb_value obj)
+{
+  win_T *win;
+
+  Data_Get_Struct(mrb, obj, &VIM_Window_type, win);
+  if (win == NULL)
+    mrb_raise(mrb, eDeletedWindowError, "attempt to refer to deleted window");
+  return win;
+}
+
+static mrb_value window_s_current(mrb_state* mrb, mrb_value self)
+{
+  return window_new(curwin);
+}
+
+/*
+ * Added line manipulation functions
+ *    SegPhault - 03/07/05
+ */
+static mrb_value line_s_current(mrb_state* mrb, mrb_value self)
+{
+  return get_buffer_line(curbuf, curwin->w_cursor.lnum);
+}
+
+static mrb_value set_current_line(mrb_state* mrb, mrb_value self)
+{
+  mrb_value str;
+  mrb_get_args(mrb, "S", &str);
+  return set_buffer_line(curbuf, curwin->w_cursor.lnum, str);
+}
+
+static mrb_value current_line_number(mrb_state* mrb, mrb_value self)
+{
+  return mrb_fixnum_value((int)curwin->w_cursor.lnum);
+}
+
+
+
+static mrb_value window_s_count(mrb_state* mrb, mrb_value self)
+{
+#ifdef FEAT_WINDOWS
+  win_T    *w;
+  int n = 0;
+
+  for (w = firstwin; w != NULL; w = w->w_next)
+    n++;
+  return mrb_fixnum_value(n);
+#else
+  return mrb_fixnum_value(1);
+#endif
+}
+
+static mrb_value window_s_aref(mrb_state* mrb, mrb_value self)
+{
+  win_T *w;
+  int n;
+  mrb_value num;
+
+  mrb_get_args(mrb, "i", &num);
+  n = mrb_fixnum(num);
+#ifndef FEAT_WINDOWS
+  w = curwin;
+#else
+  for (w = firstwin; w != NULL; w = w->w_next, --n)
+#endif
+    if (n == 0)
+      return window_new(w);
+  return mrb_nil_value();
+}
+
+static mrb_value window_buffer(mrb_state* mrb, mrb_value self)
+{
+  win_T *win = get_win(self);
+
+  return buffer_new(win->w_buffer);
+}
+
+static mrb_value window_height(mrb_state* mrb, mrb_value self)
+{
+  win_T *win = get_win(self);
+
+  return mrb_fixnum_value(win->w_height);
+}
+
+static mrb_value window_set_height(mrb_state* mrb, mrb_value self)
+{
+  win_T *win = get_win(self);
+  win_T *savewin = curwin;
+  mrb_value height;
+
+  mrb_get_args(mrb, "i", &height);
+  curwin = win;
+  win_setheight(mrb_fixnum(height));
+  curwin = savewin;
+  return height;
+}
+
+static mrb_value window_width(mrb_state* mrb, mrb_value self)
+{
+  win_T *win = get_win(self);
+
+  return mrb_fixnum_value(win->w_width);
+}
+
+static mrb_value window_set_width(mrb_state* mrb, mrb_value self)
+{
+  win_T *win = get_win(self);
+  win_T *savewin = curwin;
+  mrb_value width;
+
+  mrb_get_args(mrb, "i", &width);
+  curwin = win;
+  win_setwidth(mrb_fixnum(width));
+  curwin = savewin;
+  return width;
+}
+
+static mrb_value window_cursor(mrb_value self)
+{
+  win_T *win = get_win(self);
+
+  return mrb_assoc_new(mrb, mrb_fixnum_value(win->w_cursor.lnum), mrb_fixnum_value(win->w_cursor.col));
+}
+
+static mrb_value window_set_cursor(mrb_state* mrb, mrb_value self)
+{
+  mrb_value lnum, col;
+  win_T *win = get_win(self);
+  mrb_value pos;
+
+  mrb_get_args(mrb, "A", &pos);
+  mrb_check_type(mrb, pos, MRB_TT_ARRAY);
+  if (RARRAY_LEN(pos) != 2)
+    mrb_raise(mrb, E_ARGUMENT_ERROR, "array length must be 2");
+  lnum = RARRAY_PTR(pos)[0];
+  col = RARRAY_PTR(pos)[1];
+  win->w_cursor.lnum = mrb_fixnum(lnum);
+  win->w_cursor.col = mrb_fixnum(col);
+  check_cursor();            /* put cursor on an existing line */
+  update_screen(NOT_VALID);
+  return mrb_nil_value();
+}
+
+static mrb_value f_nop(mrb_state* mrb, mrb_value self)
+{
+  return mrb_nil_value();
+}
+
+static mrb_value f_p(mrb_state* mrb, mrb_value self)
+{
+  int argc;
+  mrb_value *argv;
+  int i;
+  mrb_value str;
+
+  mrb_get_args(mrb, "*", &argv, &argc);
+  str = mrb_str_new(mrb, "", 0);
+
+  for (i = 0; i < argc; i++) {
+    if (i > 0) mrb_str_cat(mrb, str, ", ", 2);
+    mrb_str_concat(mrb, str, mrb_inspect(mrb, argv[i]));
+  }
+  MSG(RSTRING_PTR(str));
+  return mrb_nil_value();
+}
+
+static void mruby_io_init(void)
+{
+  mrb_define_method(mrb, mrb->kernel_module, "p", f_p, ARGS_OPT(1));
+  mrb_define_method(mrb, mrb->kernel_module, "puts", vim_message, ARGS_OPT(1));
+}
+
+static void mruby_vim_init(void)
+{
+  objtbl = mrb_hash_new(mrb);
+  mrb_gv_set(mrb, mrb_intern(mrb, "$VIM_OBJECTS"), objtbl);
+
+  mVIM = mrb_define_module(mrb, "Vim");
+  mrb_define_const(mrb, mrb->object_class, "VIM", mrb_obj_value(mVIM));
+  mrb_define_const(mrb, mVIM, "VERSION_MAJOR", mrb_fixnum_value(VIM_VERSION_MAJOR));
+  mrb_define_const(mrb, mVIM, "VERSION_MINOR", mrb_fixnum_value(VIM_VERSION_MINOR));
+  mrb_define_const(mrb, mVIM, "VERSION_BUILD", mrb_fixnum_value(VIM_VERSION_BUILD));
+  mrb_define_const(mrb, mVIM, "VERSION_PATCHLEVEL", mrb_fixnum_value(VIM_VERSION_PATCHLEVEL));
+  mrb_define_const(mrb, mVIM, "VERSION_SHORT", mrb_str_new_cstr(mrb, VIM_VERSION_SHORT));
+  mrb_define_const(mrb, mVIM, "VERSION_MEDIUM", mrb_str_new_cstr(mrb, VIM_VERSION_MEDIUM));
+  mrb_define_const(mrb, mVIM, "VERSION_LONG", mrb_str_new_cstr(mrb, VIM_VERSION_LONG));
+  mrb_define_const(mrb, mVIM, "VERSION_LONG_DATE", mrb_str_new_cstr(mrb, VIM_VERSION_LONG_DATE));
+  mrb_define_module_function(mrb, mVIM, "message", vim_message, ARGS_REQ(1));
+  mrb_define_module_function(mrb, mVIM, "set_option", vim_set_option, ARGS_REQ(1));
+  mrb_define_module_function(mrb, mVIM, "command", vim_command, ARGS_REQ(1));
+  mrb_define_module_function(mrb, mVIM, "evaluate", vim_evaluate, ARGS_REQ(1));
+
+  eDeletedBufferError = mrb_define_class_under(mrb, mVIM, "DeletedBufferError",
+    mrb->eStandardError_class);
+  eDeletedWindowError = mrb_define_class_under(mrb, mVIM, "DeletedWindowError",
+    mrb->eStandardError_class);
+
+  cBuffer = mrb_define_class_under(mrb, mVIM, "Buffer", mrb->object_class);
+  mrb_define_singleton_method(mrb, cBuffer, "current", buffer_s_current, ARGS_NONE());
+  mrb_define_singleton_method(mrb, cBuffer, "count", buffer_s_count, ARGS_NONE());
+  mrb_define_singleton_method(mrb, cBuffer, "[]", buffer_s_aref, 1);
+  mrb_define_method(mrb, cBuffer, "name", buffer_name, ARGS_NONE());
+  mrb_define_method(mrb, cBuffer, "number", buffer_number, ARGS_NONE());
+  mrb_define_method(mrb, cBuffer, "count", buffer_count, ARGS_NONE());
+  mrb_define_method(mrb, cBuffer, "length", buffer_count, ARGS_NONE());
+  mrb_define_method(mrb, cBuffer, "[]", buffer_aref, ARGS_REQ(1));
+  mrb_define_method(mrb, cBuffer, "[]=", buffer_aset, ARGS_REQ(2));
+  mrb_define_method(mrb, cBuffer, "delete", buffer_delete, ARGS_REQ(1));
+  mrb_define_method(mrb, cBuffer, "append", buffer_append, ARGS_REQ(2));
+
+  mrb_define_method(mrb, cBuffer, "line_number", current_line_number, ARGS_NONE());
+  mrb_define_method(mrb, cBuffer, "line", line_s_current, ARGS_NONE());
+  mrb_define_method(mrb, cBuffer, "line=", set_current_line, ARGS_REQ(1));
+
+
+  cVimWindow = mrb_define_class_under(mrb, mVIM, "Window", mrb->object_class);
+  mrb_define_singleton_method(mrb, cVimWindow, "current", window_s_current, ARGS_NONE());
+  mrb_define_singleton_method(mrb, cVimWindow, "count", window_s_count, ARGS_NONE());
+  mrb_define_singleton_method(mrb, cVimWindow, "[]", window_s_aref, ARGS_REQ(1));
+  mrb_define_method(mrb, cVimWindow, "buffer", window_buffer, ARGS_NONE());
+  mrb_define_method(mrb, cVimWindow, "height", window_height, ARGS_NONE());
+  mrb_define_method(mrb, cVimWindow, "height=", window_set_height, ARGS_REQ(1));
+  mrb_define_method(mrb, cVimWindow, "width", window_width, ARGS_NONE());
+  mrb_define_method(mrb, cVimWindow, "width=", window_set_width, ARGS_REQ(1));
+  mrb_define_method(mrb, cVimWindow, "cursor", window_cursor, ARGS_NONE());
+  mrb_define_method(mrb, cVimWindow, "cursor=", window_set_cursor, ARGS_REQ(1));
+
+  mrb_define_method(mrb, mrb->kernel_module, "__curbuf", buffer_s_current, ARGS_NONE());
+  mrb_define_method(mrb, mrb->kernel_module, "__curwin", window_s_current, ARGS_NONE());
+}
diff -r ccbde540a714 src/main.c
--- a/src/main.c	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/main.c	Fri Apr 05 21:20:11 2013 +0900
@@ -1471,6 +1471,9 @@
 #ifdef FEAT_RUBY
     ruby_end();
 #endif
+#ifdef FEAT_MRUBY
+    mruby_end();
+#endif
 #ifdef FEAT_PYTHON
     python_end();
 #endif
diff -r ccbde540a714 src/proto.h
--- a/src/proto.h	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/proto.h	Fri Apr 05 21:20:11 2013 +0900
@@ -197,6 +197,10 @@
 #  include "if_ruby.pro"
 # endif
 
+# ifdef FEAT_MRUBY
+#  include "if_mruby.pro"
+# endif
+
 /* Ugly solution for "BalloonEval" not being defined while it's used in some
  * .pro files. */
 # ifndef FEAT_BEVAL
diff -r ccbde540a714 src/proto/if_mruby.pro
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/proto/if_mruby.pro	Fri Apr 05 21:20:11 2013 +0900
@@ -0,0 +1,9 @@
+/* if_ruby.c */
+int mruby_enabled __ARGS((int verbose));
+void mruby_end __ARGS((void));
+void ex_mruby __ARGS((exarg_T *eap));
+void ex_mrubydo __ARGS((exarg_T *eap));
+void ex_mrubyfile __ARGS((exarg_T *eap));
+void mruby_buffer_free __ARGS((buf_T *buf));
+void mruby_window_free __ARGS((win_T *win));
+/* vim: set ft=c : */
diff -r ccbde540a714 src/screen.c
--- a/src/screen.c	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/screen.c	Fri Apr 05 21:20:11 2013 +0900
@@ -301,8 +301,9 @@
 #endif
 }
 
-#if defined(FEAT_RUBY) || defined(FEAT_PERL) || defined(FEAT_VISUAL) || \
-    (defined(FEAT_CLIPBOARD) && defined(FEAT_X11)) || defined(PROTO)
+#if defined(FEAT_RUBY) || defined(FEAT_MRUBY) || defined(FEAT_PERL) || \
+    defined(FEAT_VISUAL) || (defined(FEAT_CLIPBOARD) && defined(FEAT_X11)) || \
+    defined(PROTO)
 /*
  * update all windows that are editing the current buffer
  */
diff -r ccbde540a714 src/structs.h
--- a/src/structs.h	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/structs.h	Fri Apr 05 21:20:11 2013 +0900
@@ -1671,6 +1671,10 @@
     void	*b_ruby_ref;
 #endif
 
+#ifdef FEAT_MRUBY
+    void	*b_mruby_ref;
+#endif
+
 #if defined(FEAT_SYN_HL) || defined(FEAT_SPELL)
     synblock_T	b_s;		/* Info related to syntax highlighting.  w_s
 				 * normally points to this, but some windows
@@ -2172,6 +2176,10 @@
 #ifdef FEAT_RUBY
     void	*w_ruby_ref;
 #endif
+
+#ifdef FEAT_MRUBY
+    void	*w_mruby_ref;
+#endif
 };
 
 /*
diff -r ccbde540a714 src/version.c
--- a/src/version.c	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/version.c	Fri Apr 05 21:20:11 2013 +0900
@@ -521,6 +521,11 @@
 #else
 	"-ruby",
 #endif
+#ifdef FEAT_RUBY
+	"+mruby",
+#else
+	"-mruby",
+#endif
 #ifdef FEAT_SCROLLBIND
 	"+scrollbind",
 #else
diff -r ccbde540a714 src/window.c
--- a/src/window.c	Wed Apr 03 21:14:29 2013 +0200
+++ b/src/window.c	Fri Apr 05 21:20:11 2013 +0900
@@ -4484,6 +4484,10 @@
     ruby_window_free(wp);
 #endif
 
+#ifdef FEAT_MRUBY
+    mruby_window_free(wp);
+#endif
+
     clear_winopt(&wp->w_onebuf_opt);
     clear_winopt(&wp->w_allbuf_opt);
 

あざます
configureで指定してない時にエラー出てたの直しました。