【入门夯实】Lua sub截断汉字：祖玛教主称号上屏的乱码半字

local function cutName(name)
    return string.sub(name, 1, 9)    -- 第9字节可能切进汉字中间
end

local function cutName(actor, name)
    local s = string.sub(name, 1, 12)
    local b = string.byte(s, -1)
    while b and b >= 0x80 and b < 0xC0 do   -- 剔除残缺续字节
        s = string.sub(s, 1, -2)
        b = string.byte(s, -1)
    end
    if b and b >= 0xC0 then                 -- 孤字节头一并剔除
        s = string.sub(s, 1, -2)
    end
    sendmsg(actor, 1, "祖玛教主称号：" .. s)
end