# EKSD

[xxd](https://hg.256bit.org/vim/file/tip/src/xxd) is a very good hexdump program that makes editing files on UNIX very easy.
It also doesn't support text-tables. Which sucks.

[eksd](https://hak.xwx.moe/jadedctrl/eksd) is a clone of a good hexdump program (even matching several arguments
exactly)… except it supports text-tables.

## Usage
To see a hexdump of a file, just run:
```
$ eksd $FILE > $HEXDUMP_FILE
```

If you want to turn a hexdump (from eksd or xxd) back to a file:
```
$ eksd -r $HEXDUMP_FILE > $FILE
```

And to make a hexdump with a custom text-table:
```
$ eksd -t $TABLE_FILE $FILE > $HEXDUMP_FILE
```

Text-tables are in a simple format— one hexcode per line, followed by its
character. See [./text_tables/*](text_tables/) for examples.

By default, eksd uses a built-in *fancy* text-table— it's basic ASCII,
except it'll print nice pictographics for newline characters, etc. These
require UTF, of course. If they don't work for you, use the "-a" arg to
revert to simple, non-fancy ASCII.
Note that specifying a text-table will override "-a", though.


## Examples
Here's a part of Castlevania (EU) for the NES using its text-table:
```
$ eksd -t castle-table.txt castlevania.nes  | grep -A4 "18e80"
00018e80: 5454 5454 866e 6854 6460 8486 5454 5454  ....THE.CAST....
00018e90: 5454 5454 5466 8260 6488 7660 5454 5454  .....DRACULA....
00018ea0: 5464 6e82 7084 867c 7e6e 6882 5462 6868  .CHRISTOPHER.BEE
00018eb0: 5454 5454 5454 6668 6086 6e54 5454 5454  ......DEATH.....
00018ec0: 5454 5462 6876 7c54 7688 6c7c 8470 5454  ...BELO.LUGOSI..
```
And here's that same file in [Vim’s](https://www.vim.org) xxd (just because I feel like showing off):
```
$ xxd castlevania.nes | grep -A4 "18e80"
00018e80: 5454 5454 866e 6854 6460 8486 5454 5454  TTTT.nhTd`..TTTT
00018e90: 5454 5454 5466 8260 6488 7660 5454 5454  TTTTTf.`d.v`TTTT
00018ea0: 5464 6e82 7084 867c 7e6e 6882 5462 6868  Tdn.p..|~nh.Tbhh
00018eb0: 5454 5454 5454 6668 6086 6e54 5454 5454  TTTTTTfh`.nTTTTT
00018ec0: 5454 5462 6876 7c54 7688 6c7c 8470 5454  TTTbhv|Tv.l|.pTT
```


## Installation
Making a binary requires [an implementation](https://common-lisp.net/implementations) of Common Lisp installed:
[Steel Bank Common Lisp](https://sbcl.org/) is our implementation-of-choice. It’s available on
most operating systems under the package name `sbcl`.

You also need the library-manager [Quicklisp](https://quicklisp.org), which can [be installed](https://www.quicklisp.org/beta/#installation)
quite easily, including via our [Makefile](Makefile).

To install Quicklisp, build a binary, and install it, simply:

```
$ make quicklisp
$ make build
$ sudo cp eksd /usr/local/bin/eksd
```

Bam, you've made and installed a binary! Cool!

### Tests
eksd’s tests can be run from a REPL using `ASDF:TEST-SYSTEM`, or from the
Makefile target “test”.

```
* (asdf:test-system :eksd)
* (asdf:test-system :eksd/unix)
```

```
`$ make test
```


## Misc
* License is the GNU GPLv3 ([COPYING.txt](COPYING.txt))
* Author is Jaidyn Ann <jadedctrl@posteo.at>
* Sauce is at https://hak.xwx.moe/jadedctrl/eksd