Merge pull request #611 from technomancy/eval

Add eval command

README.md

@@ -15,7 +15,10 @@ To make a retro styled game, the whole process of creation and execution takes p
 ![TIC-80](https://user-images.githubusercontent.com/1101448/29687467-3ddc432e-8925-11e7-8156-5cec3700cc04.gif)
 
 ### Features
-- Multiple progamming languages: Lua, Moonscript, Javascript and Wren
+- Multiple progamming languages: [Lua](https://www.lua.org),
+  [Moonscript](https://moonscript.org),
+  [Javascript](https://developer.mozilla.org/en-US/docs/Web/JavaScript),
+  [Wren](http://wren.io/), and [Fennel](https://fennel-lang.org).
 - Games can have mouse and keyboard as input
 - Games can have up to 4 controllers as input
 - Builtin editors: for code, sprites, world maps, sound effects and music

src/console.c

@@ -2216,6 +2216,16 @@ static void onConsoleResumeCommand(Console* console, const char* param)
 	resumeRunMode();
 }
 
+static void onConsoleEvalCommand(Console* console, const char* param)
+{
+	printLine(console);
+
+	const tic_script_config* script_config = console->tic->api.get_script_config(console->tic);
+	script_config->eval(console->tic, param);
+
+	commandDone(console);
+}
+
 static void onAddFile(const char* name, AddResult result, void* data)
 {
 	Console* console = (Console*)data;
@@ -2418,6 +2428,7 @@ static const struct
 	{"save", 	NULL, "save cart",	 				onConsoleSaveCommand},
 	{"run",		NULL, "run loaded cart",			onConsoleRunCommand},
 	{"resume",	NULL, "resume run cart",			onConsoleResumeCommand},
+	{"eval",	"=",  "run code",					onConsoleEvalCommand},
 	{"dir",		"ls", "show list of files", 		onConsoleDirCommand},
 	{"cd",		NULL, "change directory", 			onConsoleChangeDirectory},
 	{"mkdir",	NULL, "make directory", 			onConsoleMakeDirectory},

src/jsapi.c

@@ -1002,6 +1002,10 @@ static const tic_outline_item* getJsOutline(const char* code, s32* size)
 	return items;
 }
 
+void evalJs(tic_mem* tic, const char* code) {
+	printf("TODO: JS eval not yet implemented\n.");
+}
+
 static const tic_script_config JsSyntaxConfig = 
 {
 	.init 				= initJavascript,
@@ -1012,6 +1016,7 @@ static const tic_script_config JsSyntaxConfig =
 
 	.getOutline			= getJsOutline,
 	.parse 				= parseCode,
+	.eval				= evalJs,
 
 	.blockCommentStart 	= "/*",
 	.blockCommentEnd 	= "*/",

src/luaapi.c

@@ -1402,6 +1402,22 @@ static const tic_outline_item* getLuaOutline(const char* code, s32* size)
 	return items;
 }
 
+void evalLua(tic_mem* tic, const char* code) {
+	tic_machine* machine = (tic_machine*)tic;
+	lua_State* lua = machine->lua;
+
+	lua_settop(lua, 0);
+
+	if(luaL_loadstring(lua, code) != LUA_OK || lua_pcall(lua, 0, LUA_MULTRET, 0) != LUA_OK)
+	{
+		machine->data->error(machine->data->data, lua_tostring(lua, -1));
+	}
+}
+
+void evalPlaceholder(tic_mem* tic, const char* code) {
+	printf("TODO: not yet implemented\n.");
+}
+
 static const tic_script_config LuaSyntaxConfig = 
 {
 	.init 				= initLua,
@@ -1412,6 +1428,7 @@ static const tic_script_config LuaSyntaxConfig =
 
 	.getOutline			= getLuaOutline,
 	.parse 				= parseCode,
+	.eval				= evalLua,
 
 	.blockCommentStart 	= "--[[",
 	.blockCommentEnd 	= "]]",
@@ -1580,6 +1597,7 @@ static const tic_script_config MoonSyntaxConfig =
 
 	.getOutline			= getMoonOutline,
 	.parse 				= parseCode,
+	.eval				= evalPlaceholder,
 
 	.blockCommentStart 	= NULL,
 	.blockCommentEnd 	= NULL,
@@ -1720,6 +1738,28 @@ static const tic_outline_item* getFennelOutline(const char* code, s32* size)
 	return items;
 }
 
+void evalFennel(tic_mem* tic, const char* code) {
+	tic_machine* machine = (tic_machine*)tic;
+	lua_State* fennel = machine->lua;
+
+	lua_settop(fennel, 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");
+	}
+
+	lua_pushstring(fennel, code);
+	lua_call(fennel, 1, 1);
+	const char* err = lua_tostring(fennel, -1);
+
+	if (err)
+	{
+		machine->data->error(machine->data->data, err);
+	}
+}
+
+
 static const tic_script_config FennelSyntaxConfig =
 {
 	.init 				= initFennel,
@@ -1730,6 +1770,7 @@ static const tic_script_config FennelSyntaxConfig =
 
 	.getOutline			= getFennelOutline,
 	.parse 				= parseCode,
+	.eval				= evalFennel,
 
 	.blockCommentStart 	= NULL,
 	.blockCommentEnd 	= NULL,

src/ticapi.h

@@ -106,6 +106,7 @@ struct tic_script_config
 
 	const tic_outline_item* (*getOutline)(const char* code, s32* size);
 	void (*parse)(const tic_script_config* config, const char* start, u8* color, const tic_code_theme* theme);
+	void (*eval)(tic_mem* tic, const char* code);
 
 	const char* blockCommentStart;
 	const char* blockCommentEnd;

src/wrenapi.c

@@ -1344,6 +1344,10 @@ static const tic_outline_item* getWrenOutline(const char* code, s32* size)
 	return items;
 }
 
+void evalWren(tic_mem* tic, const char* code) {
+	printf("TODO: Wren eval not yet implemented\n.");
+}
+
 static const tic_script_config WrenSyntaxConfig = 
 {
 	.init 				= initWren,
@@ -1354,6 +1358,7 @@ static const tic_script_config WrenSyntaxConfig =
 
 	.getOutline			= getWrenOutline,
 	.parse 				= parseCode,
+	.eval				= evalWren,
 
 	.blockCommentStart 	= "/*",
 	.blockCommentEnd 	= "*/",