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Erlang Binary Pretty Printer

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Octocat-spinner-32 src
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Octocat-spinner-32 README.md
README.md

binpp - Erlang Binary Pretty Printer

Example usage:

1> Bin.
<<12,242,207,49,82,69,45,130,212,69,80,88,8,81,23,36,86,7,
  68,19,133,97,51,216,56,145,88,8,81,...>>
2> binpp:pprint(Bin).
0C F2 CF 31 52 45 2D 82 D4 45 50 58 08 51 17 24  .òÏ1RE-‚ÔEPX.Q.$
56 07 44 13 85 61 33 D8 38 91 58 08 51 17 24 56  V.D.…a3Ø8‘X.Q.$V
0A 14 20 4E 24 16 09 60 F4 0A 15 11 01 30 13 89  .. N$..`ô....0.‰
05 81 0F 09 15 C5 61 33 D8 54 91 52 5D 81 17 24  ....Åa3ØT‘R].$
11 14 60 23 D1 3D 55 80                          ..`#Ñ=U€
ok

Binpp will use io:format to output the formatted binary by default, however there are options making pprint functions return formatted data instead of performing direct IO write:

1> Bin2 = <<"foo bar baz">>.
<<"foo bar baz">>
2> binpp:pprint(Bin2, [{return, iolist}]).
[["66 6F 6F 20 62 61 72 20 62 61 7A                ",32,
  "foo bar baz","\n"]]
3> binpp:pprint(Bin2, [{return, binary}]).
<<"66 6F 6F 20 62 61 72 20 62 61 7A                 foo bar baz\n">>

You may use a custom printer function as well:

4> binpp:pprint(Bin2, [{printer, fun(O) -> io:format("~s~n", [O]) end}]).
66 6F 6F 20 62 61 72 20 62 61 7A                 foo bar baz

ok

An additional API is provided for printing binary fragments:

5> binpp:pprint(Bin2, {0, 3}, []).
66 6F 6F                                         foo

Also, binary byte-to-byte comparsion:

6> binpp:compare(<<1,2,1024:512,3,4>>, <<1,3,1024:512,5,6>>).
-- 02 -- -- -- -- -- -- -- -- -- -- -- -- -- --   -- 03 -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --   -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --   -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --   -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- 03 04                                       -- -- 05 06
ok

Plus a handy little helper:

7> binpp:compare(<<1,2,255,3,1024:512>>, binpp:from_str("01 02 FF CC")).
-- -- -- 03 00 00 00 00 00 00 00 00 00 00 00 00   -- -- -- CC ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ??
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ??
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ??
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ??
00 00 04 00                                       ?? ?? ?? ??
ok

That's all folks!

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