Function get_xlsxreader_handle

plugins/xlsxreader.cpp:88–94

internal function to extract a handle from the first stack param

// internal function to extract a handle from the first stack param
static void * get_xlsxreader_handle(lua_State *L) {
    if (lua_gettop(L) < 1 || lua_isnil(L, 1)) {
        luaL_error(L, "invalid xlsxreader handle");
    }
    luaL_checktype(L, 1, LUA_TUSERDATA);
    return LuaWrapper::get_object_ref(L, 1);
}

// takes a file handle and returns a table-list of sheet names
int list_sheets(lua_State *L) {