Add support for fennel as a supported language for games.

Does not include changes to the 3rd-party submodule; you'll need to do
this manually:

$ mkdir 3rd-party/fennel && cd 3rd-party/fennel
$ wget https://p.hagelb.org/fennel_original.lua
$ wget -O Makefile https://p.hagelb.org/tic-fennel-Makefile
$ make

Makefile

@@ -20,6 +20,7 @@ INCLUDES= \
 	-I$(3RD_PARTY)/sdl-gpu/include \
 	-I$(3RD_PARTY)/wren-0.1.0/src/include \
 	-I$(3RD_PARTY)/moonscript \
+	-I$(3RD_PARTY)/fennel \
 	-I$(BLIPBUF_LIB) \
 	-I$(DUKTAPE_LIB) \
 	-I$(SDL_NET_LIB) \
@@ -448,4 +449,4 @@ bin/assets/benchmark.tic.dat: demos/benchmark.tic
 	$(BIN2TXT) $< $@ -z
 
 clean: $(TIC_O) $(TIC80_O)
-	del bin\*.o
+	rm bin/*.o

include/tic80_config.h

@@ -24,8 +24,9 @@
 
 #define TIC_BUILD_WITH_LUA 		1
 #define TIC_BUILD_WITH_MOON 	1
+#define TIC_BUILD_WITH_FENNEL 	1
 #define TIC_BUILD_WITH_JS 		1
-#define TIC_BUILD_WITH_WREN 	1
+#define TIC_BUILD_WITH_WREN 	0
 
 #if defined(__APPLE__)
 #	include "AvailabilityMacros.h"
@@ -77,4 +78,4 @@
 #	else
 #		define TIC80_API
 #	endif
-#endif
+#endif

src/console.c

@@ -56,6 +56,10 @@ typedef enum
 	MoonScript,	
 #	endif
 
+#	if defined(TIC_BUILD_WITH_FENNEL)
+	Fennel,
+#	endif
+
 #endif /* defined(TIC_BUILD_WITH_LUA) */
 
 #if defined(TIC_BUILD_WITH_JS)
@@ -97,6 +101,10 @@ static const char DefaultLuaTicPath[] = TIC_LOCAL "default.tic";
 static const char DefaultMoonTicPath[] = TIC_LOCAL "default_moon.tic";
 #	endif
 
+#	if defined(TIC_BUILD_WITH_FENNEL)
+static const char DefaultFennelTicPath[] = TIC_LOCAL "default_fennel.tic";
+#	endif
+
 #endif /* defined(TIC_BUILD_WITH_LUA) */
 
 #if defined(TIC_BUILD_WITH_JS)
@@ -470,6 +478,10 @@ static void* getDemoCart(Console* console, ScriptLang script, s32* size)
 		case MoonScript: strcpy(path, DefaultMoonTicPath); break;
 #	endif
 
+#	if defined(TIC_BUILD_WITH_MOON)
+		case Fennel: strcpy(path, DefaultFennelTicPath); break;
+#	endif
+
 #endif /* defined(TIC_BUILD_WITH_LUA) */
 
 #if defined(TIC_BUILD_WITH_JS)
@@ -519,6 +531,20 @@ static void* getDemoCart(Console* console, ScriptLang script, s32* size)
 		break;
 #	endif
 
+#	if defined(TIC_BUILD_WITH_FENNEL)
+	case Fennel:
+		{
+			static const u8 FennelDemoRom[] =
+			{
+				#include "../bin/assets/luademo.tic.dat" /* TODO: fennel version */
+			};
+
+			demo = FennelDemoRom;
+			romSize = sizeof FennelDemoRom;			
+		}
+		break;
+#	endif
+
 #endif /* defined(TIC_BUILD_WITH_LUA) */
 
 
@@ -584,6 +610,11 @@ static void onConsoleLoadDemoCommandConfirmed(Console* console, const char* para
 		data = getDemoCart(console, MoonScript, &size);
 #	endif
 
+#	if defined(TIC_BUILD_WITH_FENNEL)
+	if(strcmp(param, DefaultFennelTicPath) == 0)
+		data = getDemoCart(console, Fennel, &size);
+#	endif
+
 #endif /* defined(TIC_BUILD_WITH_LUA) */
 
 #if defined(TIC_BUILD_WITH_JS)
@@ -1166,6 +1197,14 @@ static void onConsoleNewCommandConfirmed(Console* console, const char* param)
 		}
 #	endif
 
+#	if defined(TIC_BUILD_WITH_FENNEL)
+		if(strcmp(param, "fennel") == 0)
+		{
+			loadDemo(console, Fennel);
+			done = true;
+		}
+#	endif
+
 #endif /* defined(TIC_BUILD_WITH_LUA) */
 
 #if defined(TIC_BUILD_WITH_JS)
@@ -1460,6 +1499,13 @@ static void onConsoleConfigCommand(Console* console, const char* param)
 	}
 #	endif
 
+#	if defined(TIC_BUILD_WITH_FENNEL)
+	else if(strcmp(param, "default fennel") == 0)
+	{
+		onConsoleLoadDemoCommand(console, DefaultFennelTicPath);
+	}
+#	endif
+
 #endif /* defined(TIC_BUILD_WITH_LUA) */
 
 #if defined(TIC_BUILD_WITH_JS)
@@ -3264,4 +3310,4 @@ void initConsole(Console* console, tic_mem* tic, FileSystem* fs, Config* config,
 #endif
 
 	console->active = !console->embed.yes;
-}
+}

src/luaapi.c

@@ -1613,4 +1613,165 @@ const tic_script_config* getMoonScriptConfig()
 
 #endif /* defined(TIC_BUILD_WITH_MOON) */
 
+#if defined(TIC_BUILD_WITH_FENNEL)
+
+#include "fennel.h"
+
+#define FENNEL_CODE(...) #__VA_ARGS__
+
+static const char* execute_fennel_src = FENNEL_CODE(
+	local ok, val = pcall(require('fennel').eval, ...)
+	return val
+);
+
+static bool initFennel(tic_mem* tic, const char* code)
+{
+	tic_machine* machine = (tic_machine*)tic;
+	closeLua(tic);
+
+	lua_State* lua = machine->lua = luaL_newstate();
+
+	static const luaL_Reg loadedlibs[] =
+	{
+		{ "_G", luaopen_base },
+		{ LUA_LOADLIBNAME, luaopen_package },
+		{ LUA_COLIBNAME, luaopen_coroutine },
+		{ LUA_TABLIBNAME, luaopen_table },
+		{ LUA_STRLIBNAME, luaopen_string },
+		{ LUA_MATHLIBNAME, luaopen_math },
+		{ LUA_DBLIBNAME, luaopen_debug },
+		{ NULL, NULL }
+	};
+
+	for (const luaL_Reg *lib = loadedlibs; lib->func; lib++)
+	{
+		luaL_requiref(lua, lib->name, lib->func, 1);
+		lua_pop(lua, 1);
+	}
+
+	initAPI(machine);
+
+	{
+		lua_State* fennel = machine->lua;
+
+		lua_settop(fennel, 0);
+
+		if (luaL_loadbuffer(fennel, (const char *)fennel_lua, fennel_lua_len, "fennel.lua") != LUA_OK)
+		{
+			machine->data->error(machine->data->data, "failed to load fennel.lua");
+			return false;
+		}
+
+		lua_call(fennel, 0, 0);
+
+		if (luaL_loadbuffer(fennel, execute_fennel_src, strlen(execute_fennel_src), "execute_fennel") != LUA_OK)
+		{
+			machine->data->error(machine->data->data, "failed to load fennel compiler");
+			return false;
+		}
+
+		lua_pushstring(fennel, code);
+		if (lua_pcall(fennel, 1, 1, 0) != LUA_OK)
+		{
+			const char* msg = lua_tostring(fennel, -1);
+
+			if (msg)
+			{
+				machine->data->error(machine->data->data, msg);
+				return false;
+			}
+		}
+	}
+
+	return true;
+}
+
+static const char* const FennelKeywords [] =
+{
+	"do", "values", "if", "when", "each", "for", "fn", "lambda", "partial",
+	"while", "set", "global", "var", "local", "let", "tset",
+	"or", "and", "true", "false", "nil", "#", ":", "->", "->>"
+};
+
+static const tic_outline_item* getFennelOutline(const char* code, s32* size)
+{
+	enum{Size = sizeof(tic_outline_item)};
+
+	*size = 0;
+
+	static tic_outline_item* items = NULL;
+
+	if(items)
+	{
+		free(items);
+		items = NULL;
+	}
+
+	const char* ptr = code;
+
+	while(true)
+	{
+		static const char FuncString[] = "fn"; /* this probably doesn't work */
+
+		ptr = strstr(ptr, FuncString);
+
+		if(ptr)
+		{
+			const char* end = ptr;
+
+			ptr += sizeof FuncString - 1;
+
+			while(end >= code && !isalnum_(*end))  end--;
+
+			const char* start = end;
+
+			for (const char* val = start-1; val >= code && (isalnum_(*val)); val--, start--);
+
+			if(end > start)
+			{
+				items = items ? realloc(items, (*size + 1) * Size) : malloc(Size);
+
+				items[*size].pos = start - code;
+				items[*size].size = end - start + 1;
+
+				(*size)++;
+			}
+		}
+		else break;
+	}
+
+	return items;
+}
+
+static const tic_script_config FennelSyntaxConfig =
+{
+	.init 				= initFennel,
+	.close 				= closeLua,
+	.tick 				= callLuaTick,
+	.scanline 			= callLuaScanline,
+	.overline 			= callLuaOverline,
+
+	.getOutline			= getFennelOutline,
+	.parse 				= parseCode,
+
+	.blockCommentStart 	= NULL,
+	.blockCommentEnd 	= NULL,
+	.blockStringStart	= NULL,
+	.blockStringEnd		= NULL,
+	.singleComment 		= ";",
+
+	.keywords 			= FennelKeywords,
+	.keywordsCount 		= COUNT_OF(FennelKeywords),
+
+	.api 				= ApiKeywords,
+	.apiCount 			= COUNT_OF(ApiKeywords),
+};
+
+const tic_script_config* getFennelConfig()
+{
+	return &FennelSyntaxConfig;
+}
+
+#endif /* defined(TIC_BUILD_WITH_FENNEL) */
+
 #endif /* defined(TIC_BUILD_WITH_LUA) */

src/machine.h

@@ -123,7 +123,7 @@ typedef struct
 
 	struct
 	{
-#if defined(TIC_BUILD_WITH_LUA) || defined(TIC_BUILD_WITH_MOON)
+#if defined(TIC_BUILD_WITH_LUA) || defined(TIC_BUILD_WITH_MOON) || defined(TIC_BUILD_WITH_FENNEL)
 		struct lua_State* lua;
 #endif
 
@@ -176,6 +176,10 @@ const tic_script_config* getLuaScriptConfig();
 const tic_script_config* getMoonScriptConfig();
 #	endif
 
+#	if defined(TIC_BUILD_WITH_FENNEL)
+const tic_script_config* getFennelConfig();
+#	endif
+
 #endif /* defined(TIC_BUILD_WITH_LUA) */
 
 

src/tic.c

@@ -566,6 +566,10 @@ void tic_close(tic_mem* tic)
 	getMoonScriptConfig()->close(tic);
 #	endif
 
+#	if defined(TIC_BUILD_WITH_FENNEL)
+	getFennelConfig()->close(tic);
+#	endif
+
 #endif /* defined(TIC_BUILD_WITH_LUA) */
 
 
@@ -1566,6 +1570,11 @@ static const tic_script_config* getScriptConfig(const char* code)
 		return getMoonScriptConfig();
 #endif
 
+#if defined(TIC_BUILD_WITH_FENNEL)
+	if(compareMetatag(code, "script", "fennel", getFennelConfig()->singleComment)) 
+		return getFennelConfig();
+#endif
+
 #if defined(TIC_BUILD_WITH_JS)
 	if(compareMetatag(code, "script", "js", getJsScriptConfig()->singleComment) ||
 		compareMetatag(code, "script", "javascript", getJsScriptConfig()->singleComment))