Modul:TwitterSnowflake

Die Dokumentation für dieses Modul kann unter Modul:TwitterSnowflake/doc erstellt werden

local p = {};

p.snowflakeToDate = function (id_str, format, epoch)
    format = format or "!%c"
    epoch = epoch or 1288834974
    id_str = id_str or "1347684877634838528"
    if type(id_str) ~= "string" then error("bad argument #1 (expected string, got " .. type(id_str) .. ")", 2) end
    if type(format) ~= "string" then error("bad argument #2 (expected string, got " .. type(format) .. ")", 2) end
    if type(epoch) ~= "number" then error("bad argument #3 (expected number, got " .. type(epoch) .. ")", 2) end
    local hi, lo = 0, 0
    local hiexp = 1
    for c in id_str:gmatch "." do
        lo = lo * 10 + tostring(c)
        if lo >= 2^32 then
            hi, lo = hi * 10^hiexp + math.floor(lo / 2^32), lo % 2^32
            hiexp = 1
        else hiexp = hiexp + 1 end
    end
    local timestamp = math.floor((hi * 1024 + math.floor(lo / 4194304)) / 1000) + epoch
    return os.date(format, timestamp)
end