tolua 从lua传值到c++

最新推荐文章于 2024-04-10 20:51:01 发布

魔芋胡萝卜

最新推荐文章于 2024-04-10 20:51:01 发布

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分类专栏： C++ 文章标签： c lua cocos2d-x tolua 传值

本文链接：https://blog.youkuaiyun.com/x30465947/article/details/83930661

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这篇博客介绍了如何利用tolua框架，从lua脚本中获取参数并传递到c++代码中，进一步地，这些值还将由c++传递到java层。文章通过示例展示了在lua_cocos2dx_loginscenemanager.hpp和lua_cocos2dx_loginscenemanager.cpp文件中如何实现这一过程，并提及LoginScene作为逻辑类的作用。

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一般都是使用tolua将c++部分的函数和参数，在lua部分调用，现在有个需求，要从lua部分，获取参数，传递到c++部分，在由c++传递到java部分

--首先还是要有一个常规的hpp
--lua_cocos2dx_loginscenemanager.hpp

#include "base/ccConfig.h"
#ifndef __cocos2dx_loginscenemanager_h__
#define __cocos2dx_loginscenemanager_h__

#ifdef __cplusplus
extern "C" {
#endif
#include "tolua++.h"
#ifdef __cplusplus
}
#endif

int register_all_cocos2dx_loginscenemanager(lua_State *tolua_S);

#endif // __cocos2dx_loginscenemanager_h__

-- 然后还是一个常规的cpp
--lua_cocos2dx_loginscenemanager.cpp

#include "QuickSDK/lua_cocos2dx_loginscenemanager.hpp"
#include "LoginScene.h"
#include "scripting/lua-bindings/manual/CCLuaValue.h"
#include "scripting/lua-bindings/manual/LuaBasicConversions.h"
#include "scripting/lua-bindings/manual/tolua_fix.h"

--这个的用法是从c++获取参数，传递到lua
int lua_cocos2dx_loginscenemanager_LoginScene_getChannelType(lua_State* tolua_S)
{
	int argc = 0;
	bool ok = true;

	//参数判断  
	argc = lua_gettop(tolua_S) - 1;
	if (argc == 0)
	{

		int ret = LoginScene::GetInstance()->getChannelType();
		tolua_pushnumber(tolua_S, (lua_Number)ret);
		return 1;
	}
	luaL_error(tolua_S, "%s, %d, was expecting %d \n", "LoginScene::GetInstance()->getChannelType()", argc, 0);
	return 0;
}

--这个的用法就是从lua获取参数传递到c++
int lua_cocos2dx_loginscenemanager_LoginScene_setGameInfo(lua_State *tolua_S) {
	int argc = 0;
	LoginScene *cobj = nullptr;
	bool ok = true;

#if COCOS2D_DEBUG >= 1
	tolua_Error tolua_err;
#endif

#if COCOS2D_DEBUG >= 1
	if (!tolua_isusertype(tolua_S, 1, "LoginScene", 0, &tolua_err))
		goto tolua_lerror;
#endif

	cobj = (LoginScene *)tolua_tousertype(tolua_S, 1, 0);

#if COCOS2D_DEBUG >= 1
	if (!cobj) {
		tolua_error(tolua_S, "invalid 'cobj' in function "
			"'lua_cocos2dx_loginscenemanager_LoginScene_setGameInfo'",
			nullptr);
		return 0;
	}
#endif

	argc = lua_gettop(tolua_S) - 1;
	if (argc == 9) {
		const char *arg0;
		const char *arg1;
		const char *arg2;
		const char *arg3;
		const char *arg4;
		const char *arg5;
		const char *arg6;
		const char *arg7;
		int arg8;

		std::string arg0_tmp;
		ok &= luaval_to_std_string(tolua_S, 2, &arg0_tmp,"LoginScene:setGameInfo");
		arg0 = arg0_tmp.c_str();

		std::string arg1_tmp;
		ok &= luaval_to_std_string(tolua_S, 3, &arg1_tmp, "LoginScene:setGameInfo");
		arg1 = arg1_tmp.c_str();

		std::string arg2_tmp;
		ok &= luaval_to_std_string(tolua_S, 4, &arg2_tmp, "LoginScene:setGameInfo");
		arg2 = arg2_tmp.c_str();

		std::string arg3_tmp;
		ok &= luaval_to_std_string(tolua_S, 5, &arg3_tmp, "LoginScene:setGameInfo");
		arg3 = arg3_tmp.c_str();

		std::string arg4_tmp;
		ok &= luaval_to_std_string(tolua_S, 6, &arg4_tmp, "LoginScene:setGameInfo");
		arg4 = arg4_tmp.c_str();

		std::string arg5_tmp;
		ok &= luaval_to_std_string(tolua_S, 7, &arg5_tmp, "LoginScene:setGameInfo");
		arg5 = arg5_tmp.c_str();

		std::string arg6_tmp;
		ok &= luaval_to_std_string(tolua_S, 8, &arg6_tmp, "LoginScene:setGameInfo");
		arg6 = arg6_tmp.c_str();

		std::string arg7_tmp;
		ok &= luaval_to_std_string(tolua_S, 9, &arg7_tmp, "LoginScene:setGameInfo");
		arg7 = arg7_tmp.c_str();

		ok &= luaval_to_int32(tolua_S, 10, (int *)&arg8, "LoginScene:setGameInfo");

		if (!ok) {
			tolua_error(tolua_S, "invalid arguments in function "
				"'lua_cocos2dx_loginscenemanager_LoginScene_setGameInfo'",
				nullptr);
			return 0;
		}
			
		CCLOG("%s cobj->setGameInfo==", arg3);

		bool ret = cobj->setGameInfo(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
		tolua_pushboolean(tolua_S, (bool)ret);
		return 1;
	}
	luaL_error(tolua_S,
		"%s has wrong number of arguments: %d, was expecting %d \n",
		"LoginScene:setGameInfo", argc, 9);
	return 0;

#if COCOS2D_DEBUG >= 1
tolua_lerror:
	tolua_error(
		tolua_S,
		"#ferror in function 'lua_cocos2dx_loginscenemanager_LoginScene_setGameInfo'.",
		&tolua_err);
#endif

	return 0;
}



int lua_cocos2dx_loginscenemanager_LoginScene_GetInstance(lua_State* tolua_S)
{
	int argc = 0;
	bool ok = true;

	//参数判断  
	argc = lua_gettop(tolua_S) - 1;
	if (argc == 0)
	{
		LoginScene *ret = LoginScene::GetInstance();
		object_to_luaval<LoginScene>(tolua_S, "LoginScene", (LoginScene*)ret);
		return 1;
	}
	luaL_error(tolua_S, "%s, %d, was expecting %d \n", "LoginScene::GetInstance()", argc, 0);
	return 0;
}

static int
lua_cocos2dx_loginscenemanager_LoginSceneManager_finalize(lua_State *tolua_S) {
	printf("luabindings: finalizing LUA object (LoginScene)");
	return 0;
}

int lua_register_LoginSceneManager(lua_State *tolua_S) {
	tolua_usertype(tolua_S, "LoginScene");
	tolua_cclass(tolua_S, "LoginScene", "LoginScene", "", nullptr);

	tolua_beginmodule(tolua_S, "LoginScene");
	tolua_function(tolua_S, "getChannelType", lua_cocos2dx_loginscenemanager_LoginScene_getChannelType);
	tolua_function(tolua_S, "setGameInfo", lua_cocos2dx_loginscenemanager_LoginScene_setGameInfo);
	tolua_function(tolua_S, "GetInstance", lua_cocos2dx_loginscenemanager_LoginScene_GetInstance);
	tolua_endmodule(tolua_S);
	std::string typeName = typeid(LoginScene).name();
	g_luaType[typeName] = "LoginScene";
	g_typeCast["LoginScene"] = "LoginScene";
	return 1;
}

TOLUA_API int register_all_cocos2dx_loginscenemanager(lua_State *tolua_S) {
	tolua_open(tolua_S);

	tolua_module(tolua_S, nullptr, 0);
	tolua_beginmodule(tolua_S, nullptr);

	lua_register_LoginSceneManager(tolua_S);

	tolua_endmodule(tolua_S);
	return 1;
}

至于这里出现的LoginScene，只是一个逻辑类而已，就不贴了