A quick attempt at creating the lz77 compressor in C++
This compressor was made to compress level data so those fit better inside an NES ROM.
Files compressed with this tool will have an .lz77 extension.
My next step is to write a decompressor in 6502 ASM for my NES homebrew. It can be used for NES/SNES homebrew purposes.
PROVIDED "AS-IS" and "WITH ALL FAULTS".
THIS DOES NOT COME WITH A DECOMPRESSOR, READ THE DISCLAIMER AND DO NOT USE AS A TOOL OR FOR ANY KIND OF IMPORTANT/NECESSARY/USEFUL/MEANINGFUL OR OTHERWISE PERSONAL/IMPERSONAL DATA. YOU HAVE BEEN WARNED.
DISCLAIMER: This "lz77-compressor" is provided by baboomerang (the writer & provider of this software)\
"as is" and "with all faults." baboomerang (the writer & provider of this software)\
makes no representations or warranties of any kind concerning the safety,\
suitability, lack of viruses, inaccuracies, typographical errors, or other harmful\
components of this "lz77-compressor". There are inherent dangers in the use of any software,\
and you are solely responsible for determining whether this "lz77-compressor" is compatible \
with your equipment and other software installed on your equipment. You are also solely \
responsible for the protection of your equipment and backup of your data, and\
baboomerang (the writer & provider of this software) will not be liable for any damages\
you may suffer in connection with using, modifying, or distributing this "lz77-compressor" or any part of it.
This algorithm doesnt perform too well with very small data.
Usage: $ ./lz77 <file>
example: $ ./lz77 case1.hex
Previous size: 13 Compressed size: 18
Results saved to ./case1.hex.lz77
example2: $ ./lz77 titlescreen.bin
Previous size: 960 Compressed size: 516
Results saved to ./titlescreen.bin.lz77
$ xxd case1.hex
00000000: 6261 6e61 6e61 6261 6361 6e61 0a bananabacana.
$ xxd case1.hex.lz77
00000000: 0000 6200 0061 0000 6e02 0261 0602 6306 ..b..a..n..a..c.
00000010: 030a ..