From 3c721a4c1b977fa0fbd53dbc2e8a8a2ccf317a78 Mon Sep 17 00:00:00 2001
From: hippoz <paperplanelive@gmail.com>
Date: Sun, 14 Feb 2021 19:38:23 +0200
Subject: [PATCH] very very very very basic lua handling/mini-wrapper

---
 .gitignore                         |  2 ++
 Makefile                           | 39 ++++++++++++++++++++++++++++++
 README.md                          |  3 ++-
 Script.lua                         |  1 +
 bin/.heygitpleasekeepthisfolder    |  1 -
 include/LuaHandler/LuaHandler.hpp  | 18 ++++++++++++++
 src/.heygitpleasekeepthisfolder    |  1 -
 src/LuaHandler/LuaHandler.cpp      | 22 +++++++++++++++++
 src/Main/Main.cpp                  | 20 +++++++++++++++
 vendor/.heygitpleasekeepthisfolder |  1 -
 10 files changed, 104 insertions(+), 4 deletions(-)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 Script.lua
 delete mode 100644 bin/.heygitpleasekeepthisfolder
 create mode 100644 include/LuaHandler/LuaHandler.hpp
 delete mode 100644 src/.heygitpleasekeepthisfolder
 create mode 100644 src/LuaHandler/LuaHandler.cpp
 create mode 100644 src/Main/Main.cpp
 delete mode 100644 vendor/.heygitpleasekeepthisfolder

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..cbbd0b5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+bin/
+obj/
\ No newline at end of file
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..f8a9d0e
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,39 @@
+LUA_VERSION := 5.3
+LUA = lua$(LUA_VERSION)
+
+SRC_DIR := src
+OBJ_DIR := obj
+BIN_DIR := bin
+
+EXE := $(BIN_DIR)/out
+OBJ_OUT_DIRS := obj/Main obj/LuaHandler
+SRC := $(SRC_DIR)/Main/Main.cpp $(SRC_DIR)/LuaHandler/LuaHandler.cpp
+OBJ := $(OBJ_DIR)/Main/Main.o $(OBJ_DIR)/LuaHandler/LuaHandler.o
+CC := g++
+
+CPPFLAGS := -I/usr/include/$(LUA) -Iinclude -MMD -MP
+CFLAGS   := -Wall
+LDFLAGS  := 
+LDLIBS   := -l$(LUA) -ldl
+
+.PHONY: all clean run
+
+all: $(EXE)
+
+run: $(EXE)
+	@echo -e "\033[1m---> \033[1;35mRunning binary from $(EXE)\033[0m"
+	@./$(EXE)
+
+$(EXE): $(OBJ) | $(BIN_DIR)
+	$(CC) $(LDFLAGS) $^ $(LDLIBS) -o $@
+
+$(OBJ_DIR)/%.o: $(SRC_DIR)/%.cpp | $(OBJ_DIR) $(OBJ_OUT_DIRS)
+	$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@
+
+$(BIN_DIR) $(OBJ_DIR) $(OBJ_OUT_DIRS):
+	mkdir -p $@
+
+clean:
+	@$(RM) -rv $(BIN_DIR) $(OBJ_DIR)
+
+-include $(OBJ:.o=.d)
\ No newline at end of file
diff --git a/README.md b/README.md
index 491c0fa..2dce679 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
 # game
 
-yes
\ No newline at end of file
+## dependencies
+ - lua5.3
\ No newline at end of file
diff --git a/Script.lua b/Script.lua
new file mode 100644
index 0000000..8c29f65
--- /dev/null
+++ b/Script.lua
@@ -0,0 +1 @@
+libepic.say_something("lol")
\ No newline at end of file
diff --git a/bin/.heygitpleasekeepthisfolder b/bin/.heygitpleasekeepthisfolder
deleted file mode 100644
index 9f5b814..0000000
--- a/bin/.heygitpleasekeepthisfolder
+++ /dev/null
@@ -1 +0,0 @@
-git please
\ No newline at end of file
diff --git a/include/LuaHandler/LuaHandler.hpp b/include/LuaHandler/LuaHandler.hpp
new file mode 100644
index 0000000..dc9442e
--- /dev/null
+++ b/include/LuaHandler/LuaHandler.hpp
@@ -0,0 +1,18 @@
+#ifndef _LUAHANDLER_H
+#define _LUAHANDLER_H
+
+extern "C"{
+#include <lua.h>
+#include <lauxlib.h>
+}
+
+struct LuaHandler {
+    lua_State* L;
+
+    LuaHandler(lua_State* L) : L(L) {};
+
+    void defineClass(const char* className);
+    void defineFunction(const char* className, const char* valueName, lua_CFunction func);
+};
+
+#endif
\ No newline at end of file
diff --git a/src/.heygitpleasekeepthisfolder b/src/.heygitpleasekeepthisfolder
deleted file mode 100644
index 9f5b814..0000000
--- a/src/.heygitpleasekeepthisfolder
+++ /dev/null
@@ -1 +0,0 @@
-git please
\ No newline at end of file
diff --git a/src/LuaHandler/LuaHandler.cpp b/src/LuaHandler/LuaHandler.cpp
new file mode 100644
index 0000000..48bc580
--- /dev/null
+++ b/src/LuaHandler/LuaHandler.cpp
@@ -0,0 +1,22 @@
+#include <LuaHandler/LuaHandler.hpp>
+
+void LuaHandler::defineClass(const char* className) {
+    // Create a new table and assign it to a global variable
+    lua_newtable(L);
+    lua_setglobal(L, className);
+}
+
+void LuaHandler::defineFunction(const char* className, const char* valueName, lua_CFunction func) {
+    // Get the table that should have been defined with LuaHandler::defineClass
+    lua_getglobal(L, className);
+    
+    // Push the function name, as well as the function onto the stack
+    lua_pushstring(L, valueName);
+    lua_pushcfunction(L, func);
+
+    // Add the function inside the table, giving it the specified name
+    lua_settable(L, -3);
+
+    // Keep the stack balanced
+    lua_pop(L, 1);
+}
\ No newline at end of file
diff --git a/src/Main/Main.cpp b/src/Main/Main.cpp
new file mode 100644
index 0000000..edb154f
--- /dev/null
+++ b/src/Main/Main.cpp
@@ -0,0 +1,20 @@
+#include <iostream>
+
+#include <LuaHandler/LuaHandler.hpp>
+
+static int say_something(lua_State* L) {
+    std::cout << "something: " << lua_tostring(L, 1) << "\n";
+    return 1;
+}
+
+int main() {
+    lua_State* L = luaL_newstate();
+    LuaHandler handler(L);
+
+    handler.defineClass("libepic");
+    handler.defineFunction("libepic", "say_something", &say_something);
+
+    luaL_dofile(handler.L, "Script.lua");
+
+    return 0;
+}
\ No newline at end of file
diff --git a/vendor/.heygitpleasekeepthisfolder b/vendor/.heygitpleasekeepthisfolder
deleted file mode 100644
index 9f5b814..0000000
--- a/vendor/.heygitpleasekeepthisfolder
+++ /dev/null
@@ -1 +0,0 @@
-git please
\ No newline at end of file