Tag Archives: Function

(Under Linux)cannot find ‘dlsym’ ‘dlopen’ ‘dlerror’ ‘dlclose’

需要同时链接”dl“库

(Under Linux)编译lua报错luaconf.h:275:31: error: readline/readline.h: No such file or directory

需要下载并安装GNU Readline Library

PANIC: unprotected error in call to Lua API (unable to get ModuleFileName)

1: 不推荐的解决方式：将Project Properties->Configuration Properties->General下的Character Set从unicode改成multi-set；
2: 彻底的解决方式，参考此链接：http://lua-users.org/lists/lua-l/2006-06/msg00427.html

如何将Lua文本文件转化为Lua块文件（chunk file）

调用LuaAPI – lua_dump

关于lua_dump: about lua_dump: Dumps a function as a binary chunk. Receives a Lua function on the top of the stack and produces a binary chunk that, if loaded again, results in a function equivalent to the one dumped. As it produces parts of the chunk, lua_dump calls function writer (see lua_Writer) with the given data to write them.

如何在C中调用Lua脚本层的库函数

void BeginLuaLibCall( lua_State *L, const string &libName, const string &functionName )
{
     lua_pushstring( L, libName.c_str() );
     lua_gettable( L, LUA_GLOBALSINDEX );
     lua_pushstring( L, functionName.c_str() );
     lua_gettable( L, -2 );
}

void EndLuaLibCall( lua_State *L )
{
     lua_pop( L, -1 );
}

示例：调用table.getn（该函数用来获取一个table的size）

// 利用上面的函数
BeginLuaLibCall( L, "table", "getn" );
// 假设你的脚本中有一个table变量myTable，获取它到栈顶
lua_getglobal( L, "myTable" ); 
// 执行table.getn( t )
lua_call( L, 1, 1 ); 
// 打印结果
std::cout << lua_tonumber( L, -1 ) ) << std::endl;
// 将结果弹出栈
lua_pop( L, -1 );
// 将名叫“table”的table弹出栈
EndLuaLibCall( L);