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！

非常感谢！