mhv is a minimalist hexadecimal viewer.

Related tags

Overview

MHV

How it works?

The color legend
- ⬛ Null byte
- 🟦 ASCII Printable Characters
- 🟩 Space Characters
- 🟩 Control Characters
- 🟥 ASCII Extended Codes
Install

$ cargo install mhv

Usage

❯ mhv -h
A minimalist hex viewer

Usage: mhv [OPTIONS] <FILENAME>

Arguments:
  <FILENAME>  Target file

Options:
  -s, --skip <N>      Skip `N` bytes of the input. The `N` argument can also
                      include an unit (see `--length` for details). [default: 0]
  -l, --length <N>    Read `N` bytes from the input. None for full read. The `N`
                      argument can be a unit with a decimal prefix(kb, mb).
                      Examples: --length 3kb, -l3kb, --length 1mb...
                      N unis are kb(1000), K(1024), mb(1000 * 1000) M(1024 * 1024),
                      and a prefix 0x for hexadecimal, `0x0a`.
  -n, --no-squeezing  Displays all input data. Otherwise any number of output
                      lines which would be identical to the last one are replaced
                      with a line comprised of a single asterisk.
  -h, --help          Print help
  -V, --version       Print versio

Stream Workflow

Usage examples

Read 5 bytes from start

Read 32 bytes from start

Skip 16 bytes and read 40

Read using units kb(1000), K(1024), mb(1000 * 1000) or M(1024 * 1024)

Read from offset 0x50 plus 16 bytes

Read UTF16 file

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Comments

Enhance characters and rendering
Changed 0xff to print ff and bright red;

changed 0x00 to print 00 and bright black;

Complete with spaces missing bytes in redenring;

The tests was refactored;

For the last panel we print x for extended characters and ff, and . for 00;

enhancement
opened by jgardona 0
Enhance characteres

Enhance characters to better visualization. Another different characters, print 0x00 as 00 and 0xff as FF, and use in left panel more diferse characters.
enhancement

opened by jgardona 0
Ref: Use owo colors
Owo colors crate doesn't allocate. We got a boost in performance:

hyperfine --warmup 1000 -N 'target/release/mhv -l1kb tests/data/data1kb' 'mhv -l1kb tests/data/data1kb' Benchmark 1: target/release/mhv -l1kb tests/data/data1kb Time (mean ± σ): 3.8 ms ± 0.1 ms [User: 1.3 ms, System: 2.0 ms] Range (min … max): 3.6 ms … 4.4 ms 746 runs

Benchmark 2: mhv -l1kb tests/data/data1kb Time (mean ± σ): 4.1 ms ± 0.2 ms [User: 1.6 ms, System: 2.0 ms] Range (min … max): 3.9 ms … 4.9 ms 608 runs

Warning: Statistical outliers were detected. Consider re-running this benchmark on a quiet system without any interferences from other programs. It might help to use the '--warmup' or '--prepare' options.

Summary target/release/mhv -l1kb tests/data/data1kb ran 1.08 ± 0.06 times faster than mhv -l1kb tests/data/data1kb

Implement new units K and M.

function display_data was refactored to better fit unit tests.

bug fix - squeezing first line.

refactioring
opened by jgardona 0