c++读取lua配置基础类

一、内容介绍

把lua作为配置文件，里面的参数值的获取，在他人基础上做了修改，并且补充了一维数组的处理方式。

若有不足之处请多多指教。

对于二维数组，没有成功。希望大家继续补充和修改，非常感谢！

二、Lua配置文件

配置文件名称为test_read.lua 。

文件内容为：

width = 10

height = 3

title = "this is a test"

array = {r = 2,g = 3,b = 4}

array_1d = {2,5,26,8}

array_2d = {{2,5},{15,18},{25,26,28},{0,5,4}}

三、解析类头文件

对于lua单个对象解析，我在其他人基础上进一步的完善了类。

做成了一个头文件，文件名称为lua_parser.h，类名称为：lua_parser.

头文件内容为：

#ifndef _rw_lua_parser_h__

#define  _rw_lua_parser_h__

#include <string>

using namespace std;

#define luac_c

#define LUA_CORE

#include "lua.h"

#include "lauxlib.h"

#include "lualib.h"

#pragma  comment(lib,"lua5.2.3.lib")

class lua_parser

{

public:

	lua_parser(void)

	{

		l_state = luaL_newstate();

		luaL_openlibs(l_state);

	}  

	virtual ~lua_parser(void)

	{

		lua_close(l_state);

	}  

	bool load_file(string str)

	{

		if(luaL_dofile(l_state, str.c_str())){

			return false;

		}

		return true;

	}  

	string load_string(string str)

	{

		lua_getglobal(l_state, str.c_str());

		if (lua_isstring(l_state, -1))

		{

			return (string)lua_tostring(l_state, -1);

		}

		return "";

	}

	int load_integer(string str)

	{

		lua_getglobal(l_state, str.c_str());

		if (lua_isnumber(l_state, -1))

		{

			return (int)lua_tointeger(l_state, -1);

		}

		return -1;

	}  

	double load_double(string str)

	{

		lua_getglobal(l_state, str.c_str());

		if (lua_isnumber(l_state, -1))

		{

			return (double)lua_tonumber(l_state, -1);

		}

		return 0.0;

	}  

	bool load_boolean(string str)

	{

		lua_getglobal(l_state, str.c_str());

		if (lua_isboolean(l_state, -1))

		{

			return (bool)(lua_toboolean(l_state, -1) != 0 ? true:false);

		}

		return false;

	}

	bool load_map(const char* name_,const int number_,string str_[],double array_list[],int type_ = 0)

	{

		if (number_ <= 0){

			return false;

		}

		lua_getglobal(l_state,name_);

		if (!lua_istable(l_state,-1)){

			std::cout<<"input is not a table"<<std::endl;

			goto funcend;

		}

		if (type_ == 0)

		{

			for (int i =0;i < number_;i++)

			{

				lua_getfield(l_state,-1,str_[i].c_str());

				array_list[i] = (double)lua_tonumber(l_state,-1);

				lua_pop(l_state,1);

			}

		}

		else

		{

			for (int i =0;i < number_;i++)

			{

				lua_getfield(l_state,-1,str_[i].c_str());

				array_list[i] = (int)lua_tointeger(l_state,-1);

				lua_pop(l_state,1);

			}

		}

funcend:

		return true;

	}

	bool load_array(const char* name_,int*& array_)

	{

		if (NULL == name_ ){

			return false;

		}

		lua_getglobal(l_state,name_);

		if (!lua_istable(l_state,-1)){

			std::cout<<"array is not a table"<<std::endl;

		}

		int top_index = lua_gettop(l_state);

		lua_len(l_state,top_index);

		int size_arary = lua_tointeger(l_state, -1);

		array_ = new int[size_arary];

		int i = 0;

		lua_pushnil(l_state);

		while (lua_next(l_state, top_index))

		{

			int	it_idx = lua_gettop(l_state);

			array_[i] = lua_tointeger(l_state, -1);

			i++;

			lua_pop(l_state, 1);

		}

		return true;

	}

	bool load_array(const char* name_,double*& array_)

	{

		if (NULL == name_ ){

			return false;

		}

		lua_getglobal(l_state,name_);

		if (!lua_istable(l_state,-1)){

			std::cout<<"array is not a table"<<std::endl;

		}

		int top_index = lua_gettop(l_state);

		lua_len(l_state,top_index);

		int size_arary = lua_tointeger(l_state, -1);

		array_ = new double[size_arary];

		int i = 0;

		lua_pushnil(l_state);

		while (lua_next(l_state, top_index))

		{

			int	it_idx = lua_gettop(l_state);

			array_[i] = lua_tonumber(l_state, -1);

			i++;

			lua_pop(l_state, 1);

		}

		return true;

	}

private:

		lua_State* l_state;

};

#endif

内容还是算清晰的吧！基本代码自解释。所以不说了。

但是头文件还是需要lua的lib和dll库的。这些是基本的。

四、测试代码

测试代码主要一个main函数。

测试代码：

int main()

{

	//lua_State * L = luaL_newstate();

	//luaL_openlibs(L);

	// read config file

	/*int w = 0 , h = 0;*/

	//load_ui_conf(L,"test_read.lua",&w, & h);

	//lua_close(L);

	int w = 0 , h = 0;

	// number

	lua_parser _lua_parser;

	_lua_parser.load_file("test_read.lua");

	w = _lua_parser.load_integer("width");

	h = _lua_parser.load_double("height");

	cout<<"width = "<<w<< ",height ="<<h<<endl;

	cout<<"get as number is ok"<<endl;

	// string

	string title = _lua_parser.load_string("title");

	cout<<"the content is :" <<title<<endl;

	cout<<"get as string is ok"<<endl;

	// map

	char* name_ = "array";

	int number_ = 3;

	string str_[3]= {"r","g","b"};

	double array_list_[3];

	_lua_parser.load_map(name_,number_,str_,array_list_);

	cout<<"get as map is ok"<<endl;

	// array _1

	double* array_list_int = NULL;

	_lua_parser.load_array("array_1d", array_list_int);

	cout<<"get as array is ok"<<endl;

	if(NULL != array_list_int)

	{

		delete []array_list_int;

		array_list_int = NULL;

	}

	// add table and array

	return 0;

}

五、测试结果

如图：

六、参考：

http://www.360doc.com/content/11/1225/12/1317564_174843428.shtml

http://mobile.51cto.com/iphone-287727.htm

非常感谢！

七、附上测试代码：

//#define luac_c

//#define LUA_CORE

//

//#include "lua.h"

//#include "lauxlib.h"

//#include "lualib.h"

//#pragma  comment(lib,"lua5.2.3.lib")

// global

void error(lua_State * L ,const char * fmt,...)

{

	va_list argp;

	va_start(argp,fmt);

	vfprintf(stderr,fmt,argp);

	va_end(argp);

	lua_close(L);

	exit(EXIT_FAILURE);

}

// read config file

void load_ui_conf(lua_State * L,const char * file_name,int * w,int * h)

{

	if(luaL_loadfile(L,file_name) || lua_pcall(L,0,0,0))

	{

		error(L,"can not run config file: %s",lua_tostring(L,-1));

	}

	lua_getglobal(L,"width");

	if(! lua_isnumber(L,-1))

	{

		error(L,"height should be a number");

	}

	*w = lua_tointeger(L,-1);

	lua_getglobal(L,"height");

	if(! lua_isnumber(L,-1))

	{

		error(L,"width should be a number");

	}

	*h = lua_tointeger(L,-1);

	//

	//lua_getglobal(L,"array");

	//if (!lua_istable(L,-1)){

	//	std::cout<<"array is not a table"<<std::endl;

	//}

	//int top_index = lua_gettop(L);

	//lua_len(L,top_index);

	//int size_arar = lua_tointeger(L, -1);

	//int *array_re = new int[size_arar];

	lua_getglobal(L,"array");

	if (!lua_istable(L,-1)){

		std::cout<<"array is not a table"<<std::endl;

	}

	//int t_idx = lua_gettop(L);

	//lua_len(L,t_idx);

	//int size_arary = lua_tointeger(L, -1);

	int *array_re = new int[3];

	lua_getfield(L,-1,"r");

	array_re[0] = (int)lua_tonumber(L,-1);

	lua_pop(L,1);

	lua_getfield(L,-1,"g");

	array_re[1] = (int)lua_tonumber(L,-1);

	lua_pop(L,1);

	lua_getfield(L,-1,"b");

	array_re[2] = (int)lua_tonumber(L,-1);

	lua_pop(L,1);

	//////

	//lua_getglobal(L,"array_1d");

	//if (!lua_istable(L,-1)){

	//	std::cout<<"array is not a table"<<std::endl;

	//}

	//int t_idx = lua_gettop(L);

	//lua_len(L,t_idx);

	//int size_arary = lua_tointeger(L, -1);

	//int *array_test = new int[size_arary];

	//int i = 0;

	//lua_pushnil(L);

	//while (lua_next(L, t_idx))

	//{

	//	int	it_idx = lua_gettop(L);

	//	printf("%d\n", lua_tointeger(L, -1));

	//	array_test[i] = lua_tointeger(L, -1);

	//	i++;

	//	lua_pop(L, 1);

	//}

	////

	//printf("============================\n");

	//

	//lua_getglobal(L,"array_2d");

	//if (!lua_istable(L,-1)){

	//	std::cout<<"array is not a table"<<std::endl;

	//}

	//int t_idx_2 = lua_gettop(L);

	//lua_len(L,t_idx_2);

	//int size_arary_2d = lua_tointeger(L, -1);

 //	int **array_test_2d = new int*[size_arary_2d];

	//i = 0;

	//lua_pushnil(L);

	//while (lua_next(L, t_idx_2))

	//{

	//	int	it_idx = lua_gettop(L);

	//	lua_len(L,it_idx);

	//	int len = lua_tointeger(L, -1);

	//	array_test_2d[i] = new int[len];

	//	int j = 0;

	//	lua_pushnil(L);

	//

	//	while(lua_next(L, it_idx ))

	//	{

	//		printf("%d\n", lua_tointeger(L, -1));

	//		array_test_2d[i][j] = lua_tointeger(L, -1);

	//		lua_pop(L, 1);

	//		j++;

	//	}

	//	printf("------------\n");

	//	i++;

	//	//lua_pop(L, 1);

	//}

	return;

}

int main()

{

	//lua_State * L = luaL_newstate();

	//luaL_openlibs(L);

	// read config file

	/*int w = 0 , h = 0;*/

	//load_ui_conf(L,"test_read.lua",&w, & h);

	//lua_close(L);

       return 0;

}

其中注释掉的内容，有二维数组的处理，目前我还没有测试成功。也请高手指导。

全部代码免分下载：c++读取lua配置类 http://download.csdn.net/detail/cartzhang/7374271

完毕！

若有问题，请随时联系！