[ZeroBrane Studio] Re: Call arbitrary Windows DLL Function
- From: Rob Probin <rob.probin@xxxxxxxxx>
- To: "zerobrane@xxxxxxxxxxxxx" <zerobrane@xxxxxxxxxxxxx>
- Date: Thu, 2 Oct 2014 08:12:59 +0100
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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