Lua调用C,C++函数案例

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#include <iostream>
#include <vector>

#include <lua.hpp>
#include "type.h"
#include "util.h"

using namespace std;

extern lua_register_t lua_cfunction_list[];

void open_all_libs(lua_State *L)
{
    luaopen_base(L);
    luaopen_io(L);
    luaopen_os(L);
    luaopen_string(L);
    luaopen_table(L);
    luaopen_math(L);
    luaopen_bit32(L);
}

void register_functions(lua_State *L)
{
    lua_register_t *p = lua_cfunction_list;
    while (p->name) {
        lua_pushcfunction(L,p->pfunc);
        lua_setglobal(L,p->name);
        ++p; 
    }
}

bool load_lua_files(lua_State *L,const char *dir_path)
{
    vector<string> file_list;
    find_files("./",".lua",file_list);
    vector<string>::iterator iter = file_list.begin();
    for (; iter != file_list.end(); ++iter) {
        if (luaL_dofile(L,iter->c_str())) {
            cout << "ERR: loadfile " << *iter << " fail: " << lua_tostring(L,-1) << endl;
            return false;
        }
    }
    return true;
}

int main (int argc,char **argv)
{
    lua_State *L = luaL_newstate();
    if (L == NULL) {
        cout << "ERR: new state fail!" << endl;
        return 0;
    }

    /// open all lua library,such as: io,os,string,table,math...
    open_all_libs(L);           

    /// register C functions to lua
    register_functions(L);      

    /// load lua file in ./ directory.
    load_lua_files(L,"./");    

    /// run lua function "MainEntry()"
    lua_getglobal(L,"MainEntry");
    if (lua_type(L,-1) == LUA_TFUNCTION) {
        for (int i = 0; i < argc; ++i) {
            lua_pushstring(L,argv[i]);
        }
        lua_pcall(L,argc,0);
    } else {
        cout << "ERR: can't find function "MainEntry"" << endl;
    }

    return 0;
}

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