HexIO

The HexIO.jl is formed by integrating StructIO.jl and HexEdit.jl. It's similar to struct in python.

Generates IO methods (pack, unpack) from structure definitions. Also defines packed_sizeof to give the on-disk size of a packed structure, which is smaller than sizeof would give, if the struct is marked as align_packed.

Example usage

julia> using HexIO

julia> @io struct TwoUInt64s
           x::UInt64
           y::UInt64
       end

julia> buf = IOBuffer(collect(UInt8(1):UInt8(16))); 

julia> seekstart(buf); unpack(buf, TwoUInt64s) # Default endianness depends on machine
TwoUInt64s(0x0807060504030201, 0x100f0e0d0c0b0a09)

julia> seekstart(buf); unpack(buf, TwoUInt64s, :BigEndian)
TwoUInt64s(0x0102030405060708, 0x090a0b0c0d0e0f10)

io = open("", "rb")
buffer = read(io, read_size)

Hex has same fuctions for editing and displaying data in binary files in hexadecimal format.

Synopsis

dump!(self::Hex, offset = 0, n::Int = -1)

Displays binary file data beginning at offset and ending at offset + n.

• offset defaults to 0
• n defaults to file size - n.

edit!(self::Hex, datastr::String, offset = 0)

Edits targeted binary file by overwriting data beginning at offset.

• offset defaults to 0
• datastr can be in ASCII or hexadecimal format (ie. "foobar" or "0x666f6f626172")

Examples

Complete File Hexdump

hex = Hex("test/test.bin")
dump!(hex, 0x00)

00000000 | 5D 00 00 80 66 6F 6F 62   61 72 FF FF FF 00 7F E1 |]...foobar......
00000010 | 90 E6 67 83 93 40 93 22   A0 1B AB 50 6E A1 93 54 |..g..@."...Pn..T
00000020 | 3A 7F FD A3 D9 C0 60 29   AF B6 94 96 3E AA 5C 38 |:.....`)....>.\8
00000030 | 1C 05 02 31 7D 74 72 0D   40 3C 22 DA EF FA CA 80 |...1}tr.@<".....
00000040 | DF F8 E2 7B CC 65 09 29   64 C3 15 DE E6 39 B7 7E |...{.e.)d....9.~
00000050 | D5 8C AA 91 F0 28 37 E1   5D AD C0 37 74 16 CE C1 |.....(7.]..7t...
00000060 | 75 94 1E EA DD 64 D6 B5   A1 2E 54 3D 62 4B 72 30 |u....d....T=bKr0
00000070 | 5A 35 B8 5D 42 A2 24 A1   C6 22 6A BE C6 58 07 E5 |Z5.]B.$.."j..X..
00000080 | 4F F1 E3 FC 53 14 70 AA   AE 58 FA E3 D8 C4 3A DB |O...S.p..X....:.
00000090 | D2 81 CF 99 24 10 4C C1   53 76 98 BC 16 E9 C2 7E |....$.L.Sv.....~
000000A0 | 2C 6F 23 D6 F7 32 AB 81   7E 74 FD B6 FE B2 E7 15 |,o#..2..~t......
000000B0 | 83 7D 45 96 44 A8 D9 CF   B2 B8 AD 37 73 0E 15 AD |.}E.D......7s...
and so on...

Chunk Hexdump

Dump 16 bytes beginning at offset 0x04

hex = Hex("test.bin")
dump!(hex, 0x04, 16)

00000004 | 66 6F 6F 62 61 72 FF FF   FF 00 7F E1 90 E6 67 83 |foobar........g.

dump!(hex.hex, 0x04, 16)

00000004 | 66 6F 6F 62 61 72 FF FF   FF 00 7F E1 90 E6 67 83 |foobar........g.

Hexadecimal Editing (Hex String)

Write foobar to test.bin beginning at offset 0x04

hex = Hex("test.bin")
edit!(hex, "0x666f6f626172", 0x04)

Hexadecimal Editing (ASCII string)

Write foobar to test.bin beginning at offset 0x04

hex = Hex("test.bin")
edit!(hex, "foobar", 0x04)

Binary Singature Location

Return offset of the start of the hexadecimal signature "b77e"

hex = Hex("test.bin")
offset = find!(hex, "0xb77e")

Documentation

• LATEST — in-development version of the documentation.

Relevant Pkgs

• StructIO.jl
• HexEdit.jl
• StrPack.jl