TinyXML与lua的绑定及使用

TinyXML

For Lua 5.0:

From: Robert Noll

Just a plain "Parse File to lua array" function in c++, using the [TinyXML] (2.4.3) lib.

 

// header

class lua_State;
	
/// register parser functions to lua
void	RegisterLuaXML (lua_State *L);


// sourcefile

#include "tinyxml.h"

extern "C" {
	#include "lua.h"
	#include "lauxlib.h"
	#include "lualib.h"
}

void LuaXML_ParseNode (lua_State *L,TiXmlNode* pNode) { PROFILE
	if (!pNode) return;
	// resize stack if neccessary
	luaL_checkstack(L, 5, "LuaXML_ParseNode : recursion too deep");
	
	TiXmlElement* pElem = pNode->ToElement();
	if (pElem) {
		// element name
		lua_pushstring(L,"name");
		lua_pushstring(L,pElem->Value());
		lua_settable(L,-3);
		
		// parse attributes
		TiXmlAttribute* pAttr = pElem->FirstAttribute();
		if (pAttr) {
			lua_pushstring(L,"attr");
			lua_newtable(L);
			for (;pAttr;pAttr = pAttr->Next()) {
				lua_pushstring(L,pAttr->Name());
				lua_pushstring(L,pAttr->Value());
				lua_settable(L,-3);
				
			}
			lua_settable(L,-3);
		}
	}
	
	// children
	TiXmlNode *pChild = pNode->FirstChild();
	if (pChild) {
		int iChildCount = 0;
		for(;pChild;pChild = pChild->NextSibling()) {
			switch (pChild->Type()) {
				case TiXmlNode::DOCUMENT: break;
				case TiXmlNode::ELEMENT: 
					// normal element, parse recursive
					lua_newtable(L);
					LuaXML_ParseNode(L,pChild);
					lua_rawseti(L,-2,++iChildCount);
				break;
				case TiXmlNode::COMMENT: break;
				case TiXmlNode::TEXT: 
					// plaintext, push raw
					lua_pushstring(L,pChild->Value());
					lua_rawseti(L,-2,++iChildCount);
				break;
				case TiXmlNode::DECLARATION: break;
				case TiXmlNode::UNKNOWN: break;
			};
		}
		lua_pushstring(L,"n");
		lua_pushnumber(L,iChildCount);
		lua_settable(L,-3);
	}
}

static int LuaXML_ParseFile (lua_State *L) { PROFILE
	const char* sFileName = luaL_checkstring(L,1);
	TiXmlDocument doc(sFileName);
	doc.LoadFile();
	lua_newtable(L);
	LuaXML_ParseNode(L,&doc);
	return 1;
}

void	RegisterLuaXML (lua_State *L) {
	lua_register(L,"LuaXML_ParseFile",LuaXML_ParseFile);
}
1.RegisterLuaXML 注册一个函数到lua函数映射表中
2.lua中调用LuaXML_ParserFile来解析xml表格
3.lua_settable(L,-3)弹出key、value，设置到table中。

lua中使用方法：
1.在Lua中直接写明 LuaXML_ParseFile("xx/xx/xx.xml")就可以了。
2."xx/xx/xx.xml"会被压入栈的顶端，同时LuaXML_ParseFile中调用luaL_checkstring(L,1)即可获得字符串.
3.LuaXML_ParseFile直接返回一个解析好的table