hdump -- Canonical hexadecimal and ASCII dump display

Goal

Replicate hexdump -C (hd) behaviour.

Display the input offset in hexadecimal, followed by sixteen space-separated, two-column hexadecimal bytes, then the same sixteen bytes shown in printable form (or a period for non-printable bytes) enclosed in '|' characters.

Compilation

$ make all

Usage

$ hdump <file>

Output example

$ hdump my_program | head
00000000  7f 45 4c 46 02 01 01 00  00 00 00 00 00 00 00 00  |.ELF............|
00000010  03 00 3e 00 01 00 00 00  00 12 00 00 00 00 00 00  |..>.............|
00000020  40 00 00 00 00 00 00 00  a8 31 00 00 00 00 00 00  |@........1......|
00000030  00 00 00 00 40 00 38 00  0e 00 40 00 1d 00 1c 00  |....@.8...@.....|
00000040  06 00 00 00 04 00 00 00  40 00 00 00 00 00 00 00  |........@.......|
00000050  40 00 00 00 00 00 00 00  40 00 00 00 00 00 00 00  |@.......@.......|
00000060  10 03 00 00 00 00 00 00  10 03 00 00 00 00 00 00  |................|
00000070  08 00 00 00 00 00 00 00  03 00 00 00 04 00 00 00  |................|
00000080  94 03 00 00 00 00 00 00  94 03 00 00 00 00 00 00  |................|
00000090  94 03 00 00 00 00 00 00  1c 00 00 00 00 00 00 00  |................|

License

• Copyright (c) 2019-2025, J. A. Corbal
• The MIT License (MIT)
• Read LICENSE for more information