【Lua实战】位运算标记：用 32 位管理 32 个任务状态

local function setBit(value, bit)
    return value | (1 << (bit - 1))
end
local function clearBit(value, bit)
    return value & ~(1 << (bit - 1))
end
local function getBit(value, bit)
    return (value >> (bit - 1)) & 1
end

local TASK_BITS = {
    daily_sign = 1, daily_kill = 2, daily_trade = 3,
    weekly_raid = 10, weekly_pvp = 11,
}
local function serializeFlags(value)
    return tostring(value)
end
local function deserializeFlags(str)
    return tonumber(str) or 0
end
function completeTask(actor, taskName)
    local bit = TASK_BITS[taskName]
    if bit == nil then return end
    local flags = tonumber(getplayvar(actor, "HUMAN", "TASK_FLAGS") or "0")
    local newFlags = setBit(flags, bit)
    setplayvar(actor, "HUMAN", "TASK_FLAGS", newFlags, 1)
    sendmsg(actor, 0, "任务 " .. taskName .. " 已完成")
end