How To Embed Lua
How To Embed Lua Into Css
How To Embed Lua Into Computer
How To Embed Lua Into Chrome

hello.lua

-- Pack this into an object file with ld: ld -r -b binary -o hello.o hello.lua

print'Hello, World!'

Embedding lightweight scripting into C: Lua vs. QuickJS Looking for an advice from those who have experience in embedding scripting langauges into C, e.g., to provide app API. In my case, APIs are mostly for processing of unicode texts (including regexps usage for searching and replacements).
Embedding Lua in C #1 - Building Lua From Source. This is the CMakeLists.txt i used to build Lua as a static lib. I just quickly made it myself, you just need to make sure you don't try to build the standalone intepreter and compiler (luac.c & lua.c), as they have their own main methods in there.

Integrating lua into C for embedding lua interpreters in a C application. Pages 1936–1943. Previous Chapter Next Chapter. Most scripting languages provide a C API that enables them to cooperate with programs written in C. The scripting language Lua is designed to be embedded in other host languages. However, when embedding Lua. Clash of clans hack cheats and free gems online.

main.c

#include<lua.h>

#include<lualib.h>

#include<lauxlib.h>

Compile this like so:

gcc -o hello_test hello.o main.c -llua

externchar binary_hello_lua_start[];

externchar binary_hello_lua_end[];

externchar binary_hello_lua_size[];

intget_module(lua_State *lua);

intmain(int argc, char **argv){

/* Create and setup the Lua state */

lua_State *lua = lua_open();

luaL_openlibs(lua);

/* Add the loader and put it in package.loaders */

lua_register(lua, 'get_module', get_module);

luaL_dostring(lua, 'table.insert(package.loaders, get_module)');

/* Load the module */

luaL_dostring(lua, 'require 'hello'');

return0;

}

intget_module(lua_State *lua){

constchar *modname = luaL_checkstring(lua, 1);

/* This is just an example, in a real app we'd

turn modname into a real resource pointer

instead of just using hello.lua */

if(11){

luaL_loadbuffer(lua, binary_hello_lua_start, (int)&binary_hello_lua_size, modname);

} else {

lua_pushnil(lua);

}

return1;

}

EDIT: Part 2

Long time without posting, busy at work, family, etc.

Today I decided to write a bit on Lua and how to integrate it with C++.

Lua is a scripting language with an emphasis on being easily embeddable. Lua isused as the scripting language in Photoshop CS, and World of Warcraft, forexample. So if you are looking into adding scriptability to your C or C++applications Lua is quite suited for the task.

In order to learn Lua (both the language itself and how to embed it into yourapp) I recommend you Programming in Luaby one of the Luaauthors.

You can find tons of tutorials on how to get started with Lua. So I will focushere on how to integrate with C++. Most of the sources I’ve found about Lua -C++ integrations take the approach of frameworks to automatically wrap yourobjects/classes to be usable from within Lua. I find this approach confusing, Ithink it’s better to learn how to do it manually, and that’s what I will dohere.

Step 0. Compile Lua itself

Download Lua 5.2.1 and compile it. Usually it enough with make macosx ormake linux. That will generate liblua.a, the library that we will link to.

Step 1. Create a simple host app

We need a simple host app. Our host app will simply setup Lua and run a scriptfrom it. This script will have access to a std::queue from the host app. Thiswill illustrate how you can share objects with the Lua part. Later we will takea more complex example.

Let’s start with the basic skeleton of a lua environment with somecommunication with its host:

The Makefile

It uses LUAHOME that should point to the directory containing both liblua.a and the lua*.h files.

The samplehost application

How To Embed Lua

The Lua script

The code explained step by step:

Initialization

That creates a lua_State loads the standard libs in it and also loads the code in luascript.lua.

Adding variables from C++ into Lua

Then it sets a global variable in Lua from C++ code using lua_setglobal. Ifyou don’t know what are the lua_pushxxxx and the Lua stack, etc. I recomentthat you take a look at the Lua Reference Manual and Programming in Lua.More or less Lua and the C++ communicate through the stack that livesin lua_State and there is bunch of function to manipulate that stack. So inorder to set a global in Lua from C++ you must push the value into the stackand call lua_setglobal that will pop the value in the stack and assign it tothe identifier provided inside the Lua environment.

After setting the global cppvar it executes the loaded chunk of code (that is in the stack) with lua_pcall. The Lua code is able to read and print the value of cppvar. The lua code will also set a new global luavar that we will access from C++.

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Reading a Lua variable from C++

To get luavar from C++, we must first use lua_getglobal

How To Embed Lua Into Css

that will put the value associated with the identifier into the top of the stack and the lua_tonumber will transform whatever it’s at the top of the stack into a double (well a

How To Embed Lua Into Computer

luaNumber) and then we can use that double in our C++ code to print it.