Keyboard fixes

All non mapped codes will default to zero
Add in a quick hack to correct the codepoints for tab and enter, which
SDL doesn't generate a SDL_TextInputEvent for

src/component/keyboard_sdl2.lua

@@ -9,19 +9,29 @@ local keys = require("support.sdl_to_lwjgl")
 
 local code2char = {}
 
+local function setLatest(char)
+	kbdcodes[#kbdcodes].char = char
+	code2char[kbdcodes[#kbdcodes].code] = char
+end
+
 function elsa.textinput(event)
 	local textevent = ffi.cast("SDL_TextInputEvent", event)
 	local text = ffi.string(textevent.text)
 	cprint("textinput",text)
-	kbdcodes[#kbdcodes].char = lua_utf8.byte(text)
-	code2char[kbdcodes[#kbdcodes].code] = kbdcodes[#kbdcodes].char
+	setLatest(lua_utf8.byte(text))
 end
 
 function elsa.keydown(event)
 	local keyevent = ffi.cast("SDL_KeyboardEvent", event)
 	local key = keyevent.keysym.scancode
 	cprint("keydown",keys[key])
-	table.insert(kbdcodes,{type="key_down",addr=address,code=keys[key]})
+	table.insert(kbdcodes,{type="key_down",addr=address,code=keys[key] or 0})
+	-- TODO: Lovely SDL Hacks
+	if keys[key] == 15 then
+		setLatest(9)
+	elseif keys[key] == 28 or keys[key] == 156 then
+		setLatest(13)
+	end
 	if keys[key] == 210 then
 		if SDL.hasClipboardText() > 0 then
 			table.insert(machine.signals,{"clipboard",address,ffi.string(SDL.getClipboardText())})

src/support/sdl_to_lwjgl.lua

@@ -43,7 +43,6 @@ return {
 [46]=13,
 [47]=26,
 [48]=27,
-[49]=0,
 [51]=39,
 [52]=40,
 [53]=41,
@@ -85,20 +84,16 @@ return {
 [90]=208,
 [91]=209,
 [92]=203,
-[93]=0,
 [94]=205,
 [95]=199,
 [96]=200,
 [97]=201,
 [98]=210,
 [99]=211,
-[101]=0,
 [224]=29,
 [225]=42,
 [226]=56,
-[227]=0,
 [228]=157,
 [229]=54,
 [230]=184,
-[231]=0,
 }