[ZeroBrane Studio] Re: Call arbitrary Windows DLL Function
- From: "Steve Russell" <steve.russell@xxxxxxxxxxxxxxxxxxxxx>
- To: <zerobrane@xxxxxxxxxxxxx>
- Date: Thu, 2 Oct 2014 09:14:04 +0100
Thanks for the feedback Rob. I’ll investigate Alien.
Steve
From: zerobrane-bounce@xxxxxxxxxxxxx [mailto:zerobrane-bounce@xxxxxxxxxxxxx] On
Behalf Of Rob Probin
Sent: 02 October 2014 08:13
To: zerobrane@xxxxxxxxxxxxx
Subject: [ZeroBrane Studio] Re: Call arbitrary Windows DLL Function
Perhaps someone else could comment on your extension DLL code - haven't had
enough time to review it.
On 2 Oct 2014, at 08:10, Rob Probin <rob.probin@xxxxxxxxx> wrote:
Not sure about the Lua built into ZBS, but standard Lua doesn't support such
things without extension. But that's not difficult.
For instance LuaforWindows https://code.google.com/p/luaforwindows/ has various
extension libraries, for instance Alien - which allows access to unknown DLLs.
There are other ones like LuaInterface that allows access to the CLR.
You can use Alien even if you are not using LuaForWindows - it's available as a
LuaRock, for instance, the Lua package manager.
On 1 Oct 2014, at 11:56, "Steve Russell" <steve.russell@xxxxxxxxxxxxxxxxxxxxx>
wrote:
Hi,
Does anybody know if it is possible to call a function in any system DLL in
Windows/Lua 5.2/ZBS?
I would like to call 3rd party and system functions. Ideally I’d call the DLL
functions from Lua directly, but I’m also considering writing a proxy DLL for
Lua to load and this would then load the 3rd party DLL and interact with the
functions contained therein.
I started by creating a Win32 DLL in VS2010 but Lua command line and ZBS 0.80
hang/crash during the ‘require(“LuaProxy”)’, here’s the C code:
// LuaProxy.cpp : Defines the exported functions for the DLL application.
//
#include "stdafx.h"
#include <iostream>
// LuaProxy.cpp : Defines the exported functions for the DLL application.
//
#include <lua.hpp>
extern "C"
{
static int funval = 10;
static int function_1(lua_State* l)
{
std::cout << "[DLL] Function 1 is very funny." << std::endl;
std::cout << "[DLL] It's fun value is: " << funval << std::endl;
lua_pushnumber(l, funval);
return 1;
}
static int function_2(lua_State* l)
{
std::cout << "[DLL] Function 2 is twice as funny!" << std::endl;
std::cout << "[DLL] It's fun value is: " << 2*funval << std::endl;
lua_pushnumber(l, 2*funval);
return 1;
}
/*
* Registering functions
*/
static const struct luaL_Reg cfunctions[] = {
{"fun1", function_1},
{"fun2", function_2},
{NULL, NULL}
};
int __declspec(dllexport) luaopen_LuaProxy(lua_State* l)
{
// luaL_newlibtable(l, cfunctions);
// luaL_setfuncs(l, cfunctions, 0);
luaL_openlib(l, "lp", cfunctions, 0);
std::cout << "fun1(), fun2()" << std::endl;
return 1;
}
} // end extern "C"
Cheers,
Steve
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