Most recyclable

Yusuke Endoh
mame@ruby-lang.org
https://github.com/mame/

Judges' comments:

To build:

make endoh2

To run:

 make all

You’ll need to have Ruby installed to run all the automated check

make check

Try:

cat jpeg.c

Look at jpeg.jpg in an image viewer program.

Selected Judges Remarks:

This is a program which, when fed its own source, generates a program that almost is its whitespace inverse, which, in its order, generates a JPEG file (speaking of file size abuse, that is about 16.4 times larger than a PBM file with the same image, but the source was also abusing the size counting program…)

Don’t pay attention to the OCR ~~behind the ruby curtain~~ — it’s a straightforward bitmap comparison.

Author’s comments:

Highlights

LZ77-like compression for font and template data
tiny JPEG encoder
- Zig-zag space-filling curve
- Discrete cosine transform
- JPEG Huffman encoding (cheeting)

Notes

I picked JPEG instead of PNG, GIF, or BMP because it is the most difficult to generate. I believe that the JPEG encoder is the world’s smallest ever. Nevertheless, the program was too big to meet the IOCCC’s size rule. So I created a smaller bootstrap program that generates the main program. prog.c contains fragments of the main program as a comment which iocccsize -i does not count. I gratefully think the judges for spoiling the size rule this year.

I think the program will work on any major platforms and compilers.

Legal

This program uses (a part of) Proggy Tiny Fonts which is distributed in MIT License:

Copyright (c) 2004, 2005 Tristan Grimmer

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.