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