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statsderl

0.5.2
0.7.3 0.7.2 0.7.1 0.7.0 0.6.1 0.5.2

High Performance Erlang StatsD Client

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statsderl src statsderl_udp.erl
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src/statsderl_udp.erl 

-module(statsderl_udp).

-include("statsderl.hrl").



-compile(inline).

-compile({inline_size, 512}).



-export([

    header/2

]).



-define(INET_AF_INET, 1).

-define(INT16(X), [((X) bsr 8) band 16#ff, (X) band 16#ff]).



%% public

-spec header(inet:ip_address(), inet:port_number()) ->

    iodata().



-ifdef(UDP_HEADER).



header(IP, Port) ->

    [?INET_AF_INET, ?INT16(Port) | ip4_to_bytes(IP)].



-else.



header(IP, Port) ->

    [?INT16(Port) | ip4_to_bytes(IP)].



-endif.



%% private

ip4_to_bytes({A, B, C, D}) ->

    [A band 16#ff, B band 16#ff, C band 16#ff, D band 16#ff].