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Landon Curt Noll
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Add 2020 source files for real
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‎2020/2020.tar.bz2‎

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‎2020/MANIFEST‎

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2020/MANIFEST
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2020/Makefile
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2020/README.text
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2020/burton/Makefile
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2020/burton/check.sh
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2020/burton/check_be.sh
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2020/burton/correct
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2020/burton/hint.text
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2020/burton/prog.c
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2020/carlini/Makefile
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2020/carlini/hint.text
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2020/carlini/prog.c
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2020/endoh1/Makefile
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2020/endoh1/hilbert16x8.txt
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2020/endoh1/hilbert2x2.txt
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2020/endoh1/hilbert4x4.txt
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2020/endoh1/hilbert8x8.txt
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2020/endoh1/hint.text
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2020/endoh1/ioccc.txt
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2020/endoh1/megumin.txt
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2020/endoh1/prog.c
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2020/endoh1/prog.orig.c
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2020/endoh1/unwinnable.txt
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2020/endoh2/Makefile
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2020/endoh2/bear.txt
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2020/endoh2/hello.txt
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2020/endoh2/hint.text
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2020/endoh2/prog.c
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2020/endoh2/spoiler.zip
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2020/endoh2/yoda.txt
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2020/endoh3/Makefile
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2020/endoh3/hint.text
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2020/endoh3/prog.alt.c
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2020/endoh3/prog.c
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2020/endoh3/run_clock.sh
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2020/ferguson1/COMPILING
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2020/ferguson1/HACKING
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2020/ferguson1/Makefile
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2020/ferguson1/bugs.text
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2020/ferguson1/cake.jpg
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2020/ferguson1/cannibalism.log
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2020/ferguson1/chocolate-cake.text
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2020/ferguson1/crazy.log
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2020/ferguson1/gameplay.text
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2020/ferguson1/halfwidth_vs_fullwidth.png
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2020/ferguson1/hint.text
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2020/ferguson1/ioccc-cake.jpg
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2020/ferguson1/play.sh
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2020/ferguson1/prog.2.c
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2020/ferguson1/prog.3-j.c
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2020/ferguson1/prog.3.c
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2020/ferguson1/prog.alt.c
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2020/ferguson1/prog.c
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2020/ferguson1/snake-colours.sh
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2020/ferguson1/snake.1
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2020/ferguson1/spoilers.text
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2020/ferguson1/termcaps.c
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2020/ferguson1/terminals.text
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2020/ferguson1/troubleshooting.text
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2020/ferguson2/Makefile
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2020/ferguson2/cake.jpg
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2020/ferguson2/chocolate-cake.text
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2020/ferguson2/enigma.1
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2020/ferguson2/hint.text
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2020/ferguson2/input.txt
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2020/ferguson2/ioccc-cake.jpg
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2020/ferguson2/obfuscation.key
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2020/ferguson2/obfuscation.text
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2020/ferguson2/obfuscation.txt
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2020/ferguson2/prog.c
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2020/ferguson2/recode.1
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2020/ferguson2/recode.c
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2020/ferguson2/recode.text
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2020/ferguson2/try.this.txt
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2020/giles/Makefile
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2020/giles/dtmf.bin
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2020/giles/hint.text
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2020/giles/pi.wav
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2020/giles/prog.c
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2020/guidelines.txt
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2020/iocccsize-test.sh
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2020/iocccsize.c
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2020/iocccsize.mk
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2020/kurdyukov1/Makefile
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2020/kurdyukov1/hint.text
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2020/kurdyukov1/prog.c
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2020/kurdyukov1/prog.extra.c
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2020/kurdyukov1/prog.orig.c
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2020/kurdyukov1/prog.x86.asm
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2020/kurdyukov1/prog.x86_64.asm
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2020/kurdyukov2/Makefile
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2020/kurdyukov2/hint.text
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2020/kurdyukov2/makegif.sh
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2020/kurdyukov2/prog.c
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2020/kurdyukov2/prog.png
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2020/kurdyukov2/prog.png.c
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2020/kurdyukov2/prog.ppm
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2020/kurdyukov2/prog.ppm.c
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2020/kurdyukov2/sample.jpg
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2020/kurdyukov3/Makefile
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2020/kurdyukov3/hint.text
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2020/kurdyukov3/input.txt
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2020/kurdyukov3/prog.c
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2020/kurdyukov3/prog.extra.c
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2020/kurdyukov3/prog.orig.c
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2020/kurdyukov4/Makefile
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2020/kurdyukov4/hint.text
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2020/kurdyukov4/prog.c
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2020/kurdyukov4/rand.c
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2020/otterness/Makefile
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2020/otterness/hint.text
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2020/otterness/prog.c
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2020/rules.txt
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2020/tsoj/Makefile
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2020/tsoj/hint.text
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2020/tsoj/prog.c
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2020/yang/Makefile
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2020/yang/cppp.cc
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2020/yang/hint.text
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2020/yang/prog.c

‎2020/Makefile‎

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#!/usr/bin/env make
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#
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# 2020 makefile
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#
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# This work by Landon Curt Noll, Simon Cooper, and Leonid A. Broukhis
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# is licensed under:
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#
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# Creative Commons Attribution-ShareAlike 3.0 Unported License.
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#
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# See: http://creativecommons.org/licenses/by-sa/3.0/
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################
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# tool locations
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################
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#
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SHELL= /bin/bash
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#
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BUNZIP2= bunzip2
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BZIP2= bzip2
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CP= cp
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CPP= cpp
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CURL= curl
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DD= dd
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ECHO= echo
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GREP= grep
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GUNZIP= gunzip
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GZIP_PROG= gzip
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LD= ld
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MAKE= make
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MKDIR= mkdir
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MV= mv
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RM= rm
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SED= sed
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SORT= sort
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STRIP= strip
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TAR= tar
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TR= tr
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TRUE= true
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UNIQ= uniq
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# Set X11_LIBDIR to the directory where the X11 library resides
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#
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#X11_LIBDIR= /usr/X11R6/lib
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#X11_LIBDIR= /usr/X11/lib
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X11_LIBDIR= /opt/X11/lib
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# Set X11_INCLUDEDIR to the directory where the X11 include files reside
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#
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#X11_INCDIR= /usr/X11R6/include
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#X11_INCDIR= /usr/X11/include
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X11_INCDIR= /opt/X11/include
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# ANSI compiler
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#
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# Set CC to the name of your ANSI compiler.
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#
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CC= cc
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###############
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# IOCCC winners
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###############
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#
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WINNERS= burton carlini endoh1 endoh2 endoh3 ferguson1 ferguson2 giles \
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kurdyukov1 kurdyukov2 kurdyukov3 kurdyukov4 otterness tsoj yang
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###################
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# build all entries
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###################
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#
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all:
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@for i in ${WINNERS} ; do \
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${ECHO} "(cd $$i && $(MAKE) X11_LIBDIR=${X11_LIBDIR} X11_INCDIR=${X11_INCDIR} $@)"; \
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(cd $$i && $(MAKE) "X11_LIBDIR=${X11_LIBDIR}" "X11_INCDIR=${X11_INCDIR}" $@); \
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done
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# alternative executable
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#
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alt:
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@for i in ${WINNERS} ; do \
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${ECHO} "(cd $$i && $(MAKE) X11_LIBDIR=${X11_LIBDIR} X11_INCDIR=${X11_INCDIR} $@)"; \
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(cd $$i && $(MAKE) "X11_LIBDIR=${X11_LIBDIR}" "X11_INCDIR=${X11_INCDIR}" $@); \
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done
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###############
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# utility rules
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###############
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#
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everything: all alt
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clean:
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@for i in ${WINNERS} ; do \
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${ECHO} "(cd $$i && $(MAKE) $@)"; \
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(cd $$i && $(MAKE) $@); \
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done
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clobber:
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@for i in ${WINNERS} ; do \
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${ECHO} "(cd $$i && $(MAKE) $@)"; \
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(cd $$i && $(MAKE) $@); \
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done
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nuke: clobber
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@for i in ${WINNERS} ; do \
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${ECHO} "(cd $$i && $(MAKE) $@)"; \
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(cd $$i && $(MAKE) $@); \
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done
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install:
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@for i in ${WINNERS} ; do \
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${ECHO} "(cd $$i && $(MAKE) $@)"; \
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(cd $$i && $(MAKE) $@); \
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done
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##################
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# 133t hacker rulz
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##################
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#
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love:
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@for i in ${WINNERS} ; do \
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${ECHO} "(cd $$i && $(MAKE) $@)"; \
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(cd $$i && $(MAKE) $@); \
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done
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haste:
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@for i in ${WINNERS} ; do \
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${ECHO} "(cd $$i && $(MAKE) $@)"; \
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(cd $$i && $(MAKE) $@); \
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done
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waste:
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@for i in ${WINNERS} ; do \
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${ECHO} "(cd $$i && $(MAKE) $@)"; \
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(cd $$i && $(MAKE) $@); \
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done
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make:
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@for i in ${WINNERS} ; do \
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${ECHO} "(cd $$i && $(MAKE) $@)"; \
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(cd $$i && $(MAKE) $@); \
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done
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easter_egg:
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@for i in ${WINNERS} ; do \
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${ECHO} "(cd $$i && $(MAKE) $@)"; \
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(cd $$i && $(MAKE) $@); \
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done
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fabricate fashion form frame manufacture produce:
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@for i in ${WINNERS} ; do \
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${ECHO} "(cd $$i && $(MAKE) $@)"; \
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(cd $$i && $(MAKE) $@); \
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done
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sandwich:
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@for i in ${WINNERS} ; do \
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${ECHO} "(cd $$i && $(MAKE) $@)"; \
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(cd $$i && $(MAKE) $@); \
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done
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# The IOCCC resident astronomer states
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#
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charon: supernova
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@for i in ${WINNERS} ; do \
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${ECHO} "(cd $$i && $(MAKE) $@)"; \
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(cd $$i && $(MAKE) $@); \
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done
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pluto: supernova
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@for i in ${WINNERS} ; do \
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${ECHO} "(cd $$i && $(MAKE) $@)"; \
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(cd $$i && $(MAKE) $@); \
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done

‎2020/README.text‎

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## 2020 marked the "The Twenty Seventh International Obfuscated C Code Contest"
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Copyright (C) 2020, Landon Curt Noll, Simon Cooper, and Leonid A.
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Broukhis. All Rights Reserved. Permission for personal, educational
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or non-profit use is granted provided this copyright and notice are
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included in its entirety and remains unaltered. All other uses
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must receive prior permission from the contest judges.
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## Standard IOCCC stuff
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The primary IOCCC web site can be found at,
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> <http://www.ioccc.org/>
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Use make to compile entries. It is possible that on non-Un\*x / non-Linux
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systems the makefile needs to be changed. See the Makefile for details.
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Look at the source and try to figure out what the programs do, and run
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them with various inputs. If you want to, look at the hints files for
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spoilers - this year we included most of the information included
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by the submitter.
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Read over the makefile for compile/build issues. Your system may require
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certain changes (add or remove a library, add or remove a #define).
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Some C compilers are not quite as good as they should be. If yours is
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lacking, you may need to compile using clang or gcc instead of your local
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compiler.
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## Remarks on some of the winners
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This year's Best of Show (carlini) is such a novel way of obfuscation that it would be
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worth of a special mention in the (future) Best of IOCCC list!
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For some reason, this year's set of winners contains three nostalgic games,
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Asteroids (tsoj), Minesweeper (endoh1), and Snake (ferguson1).
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An entry (kurdyukov1) pays homage to a previous winner (2015/hou).
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...We'll stop spouting spoilers now. Have fun exploring all the entries!
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## Remarks on some of submissions that did not win
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As a rule, we try to compile the entries on a variety of platforms.
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Quite a few entries this year could not be built or executed on some of them due to reliance on
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library internals or the system runtime.
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A few entries were violating the "2053 significant bytes" rule. If an entry could not be brought to
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compliance within a few seconds of looking at the source, it was disqualified.
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One entry tried to get around the size limit by putting the code into
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makefile variables and using -D. This is already called out as discouraged
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technique in the guidelines, but it is worth a reminder.
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Several promising entries attempted to make use of the `syscall` function using literal syscall numbers.
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This is utterly non-portable.
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A note to the authors: when submitting multiple entries, don't let us easily correlate them by
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coding style or documentation content, and definitely don't submit nearly identical versions
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of your program separately. As we try to judge the entries anonymously, the similarities will cause such
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entries to compete against one another, making each less likely to win.
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We hope the authors of non-winning entries will refine their entries and
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perhaps re-submit them for the next IOCCC.
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## Final Comments
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One more thing that feels dated is digraphs and trigraphs.
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Please feel free to send us comments and suggestions about the
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competition, this README or anything else that you would like to see in
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future contests.
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If you use, distribute or publish these entries in some way, please drop
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us a line. We enjoy seeing who, where and how the contest is used.
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If you have problems with any of the entries, AND YOU HAVE A FIX, please
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send us the fix (patch file or the entire changed file).
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For the latest information on how to contact the IOCCC Judges please visit
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> <http://www.ioccc.org/contact.html>
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For news of the next contest watch:
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> <http://www.ioccc.org/>
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-----------------------------------------------------------------------------------------------------
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(c) Copyright 1984-2020, [Leo Broukhis, Simon Cooper, Landon Curt Noll][judges] - All rights reserved
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This work is licensed under a [Creative Commons Attribution-ShareAlike 3.0 Unported License][cc].
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[judges]: http://www.ioccc.org/judges.html
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[cc]: http://creativecommons.org/licenses/by-sa/3.0/
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-----------------------------------------------------------------------------------------------------

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