diff --git a/2020/ferguson2/Makefile b/2020/ferguson2/Makefile index ae91cfdd9..f4c075494 100644 --- a/2020/ferguson2/Makefile +++ b/2020/ferguson2/Makefile @@ -1,14 +1,41 @@ #!/usr/bin/env make # -# 2020 makefile +# IOCCC 2020 winning entry - ferguson2 + +################################################################################ # -# This work by Landon Curt Noll, Simon Cooper, and Leonid A. Broukhis -# is licensed under: +# Regarding individual entries: +# +# IOCCC winning entry code may not work on your system. Even with standards, +# conditions and build environments change, especially when it comes to more +# extreme code such you might find in an IOCCC winner. Moreover, what was +# allowed and liked in one IOCCC contest may no longer be liked/allowed in +# later IOCCC years. +# +# Corrections on winning author and fixing typos in remarks are VERY WELCOME. +# +# GitHub pull requests are welcome: +# +# If you have a patch that might make running an entry work in modern Unix-like +# environments, please create a GitHub pull request for the IOCCC judges to +# consider. +# +# Suggestions and corrections regarding Makefiles, winning author information, +# fixing typos in remarks, and code patches are welcome via opening a GitHub +# issue or better yet, by creating a GitHub pull request for the IOCCC judges +# to consider. To form a GitHub issue or GitHub pull, please visit: +# +# https://github.com/ioccc-src/winner +# +################################################################################ + +# This work by Landon Curt Noll and Leonid A. Broukhis is licensed under: # # Creative Commons Attribution-ShareAlike 3.0 Unported License. # # See: http://creativecommons.org/licenses/by-sa/3.0/ + ############################# # shell used by this Makefile ############################# @@ -19,264 +46,7 @@ SHELL= bash # common tool locations ####################### # -A2P= a2p -AR= ar -ASA= asa -AT= at -ATQ= atq -ATRM= atrm -AWK= awk -BANNER= banner -BASE64= base64 -BASENAME= basename -BATCH= batch -BC= bc -BINHEX= binhex -BISON= bison -BUNZIP2= bunzip2 -BZCAT= bzcat -BZCMP= bzcmp -BZDIFF= bzdiff -BZEGREP= bzegrep -BZFGREP= bzfgrep -BZGREP= bzgrep -BZIP2= bzip2 -BZLESS= bzless -BZMORE= bzmore -C2PH= c2ph -C89= c89 -C99= c99 -CAL= cal -CALC= calc -CAT= cat -CD= cd -CHFLAGS= chflags -CHGRP= chgrp -CHMOD= chmod -CKSUM= cksum -CLANG= clang -CLANG_PLUSPLUS= clang++ -CLEAR= clear -CMP= cmp -COL= col -COLLDEF= colldef -COLRM= colrm -COLUMN= column -COMPRESS= compress -CP= cp -CPIO= cpio -CPP= cpp -CRC32= crc32 -CSH= csh -CSPLIT= csplit -CURL= curl -CUT= cut -C_PLUSPLUS= c++ -C_PLUSPLUS_FILT= c++filt -DATE= date -DC= dc -DD= dd -DF= df -DIFF3= diff3 -DIFF= diff -DIG= dig -DIRNAME= dirname -ED= ed -EGREP= egrep -ENV= env -EQN= eqn -ETAGS= etags -EXPECT= expect -EXPR= expr -FALSE= false -FGREP= fgrep -FILE= file -FIND2PERL= find2perl -FIND= find -FLEX= flex -FLEX_PLUSPLUS= flex++ -FMT= fmt -FOLD= fold -FS_USAGE= fs_usage -FUNZIP= funzip -FUSER= fuser -GCC= gcc -GDIFFMK= gdiffmk -GENCAT= gencat -GENSTRINGS= genstrings -GETOPT= getopt -GETOPTS= getopts -GINDENT= gindent -GNUMAKE= gnumake -GREP= grep -GROFF= groff -GROFFER= groffer -GROG= grog -GROPS= grops -GROTTY= grotty -GUNZIP= gunzip -GVIM= gvim -GZCAT= gzcat -GZEXE= gzexe -GZIP_PROG= gzip -G_PLUSPLUS= g++ -H2PH= h2ph -H2XS= h2xs -HASH= hash -HEAD= head -HOSTNAME_PROG= hostname -ICONV= iconv -ID= id -INDENT= indent -INFO= info -JOT= jot -KILL= kill -KSH= ksh -LAST= last -LD= ld -LESSECHO= lessecho -LEX= len -LINK= link -LN= ln -LS= ls -M4= m4 -MAKE= make -MAN= man -MKDIR= mkdir -MKFIFO= mkfifo -MKTEMP= mktemp -MV= mv -NANO= nano -NASM= nasm -NEQN= neqn -NICE= nice -NL= nl -NM= nm -NOHUP= nohup -NROFF= nroff -NSLOOKUP= nslookup -OD= od -OPENSSL= openssl -PASTE= paste -PATCH= patch -PATHCHK= pathchk -PAX= pax -PERL= perl -PICO= pico -PR= pr -PRINTENV= printenv -PS= ps -PTAR= ptar -PTARDIFF= ptardiff -PTARGREP= ptargrep -PWD= pwd -PYDOC= pydoc -PYTHON= python -PYTHONW= pythonw -READLINK= readlink -RENICE= renice -RESET= reset -REV= rev -RI= ri -RM= rm -RMDIR= rmdir -RSYNC= rsync -RUBY= ruby -RVIM= rvim -SAY= say -SCP= scp -SCREEN= screen -SCRIPT= script -SDIFF= sdiff -SED= sed -SEQ= seq -SFTP= sftp -SH= sh -SHA1= sha1 -SHA= sha -SHAR= shar -SHASUM5_18= shasum5.18 -SHASUM= shasum -SIZE= size -SLEEP= sleep -SORT= sort -SSH= ssh -STAT= stat -STRIP= strip -STTY= stty -SUM= sum -SYNC= sync -TABS= tabs -TAIL= tail -TAR= tar -TEE= tee -TEST= test -TFTP= tftp -TIDY= tidy -TIME= time -TOP= top -TOUCH= touch -TPUT= tout -TPUT= tput -TR= tr -TROFF= troff -TRUE= true -TSET= tset -TSORT= tsort -UL= ul -UNAME= uname -UNCOMPRESS= uncompress -UNEXPAND= unexpand -UNIFDEF= unifdef -UNIFDEFALL= unifdefall -UNIQ= uniq -UNITS= units -UNLINK= unlink -UNZIP= unzip -UNZIPSFX= unzipsfx -UPTIME= uptime -UUDECODE= uudecode -UUENCODE= uuencode -UUIDGEN= uuidgen -VI= vi -VIEW= view -VIM= vim -VIMDIFF= vimdiff -W= w -WAIT4PATH= wait4path -WAIT= wait -WC= wc -WHAT= what -WHATIS= whatis -WHICH= which -WHO= who -WHOAMI= whoami -WHOIS= whois -WRTIE= write -XAR= xar -XARGS= xargs -XATTR= xattr -XXD= xxd -YACC= yacc -YES= yes -ZCAT= zcat -ZCMP= zcmp -ZDIFF= zdiff -ZEGREP= zegrep -ZFGREP= zfgrep -ZFORCE= zforce -ZGREP= zgrep -ZIP= zip -ZIPCLOAK= zipcloak -ZIPGREP= zipgrep -ZIPINFO= zipinfo -ZIPNOTE= zipnote -ZIPSPLIT= zipsplit -ZLESS= zless -ZMORE= zmore -ZNEW= znew -ZPRINT= zprint -ZSH= zsh +include ../../var.mk # Set X11_LIBDIR to the directory where the X11 library resides # @@ -290,67 +60,25 @@ X11_LIBDIR= /opt/X11/lib #X11_INCDIR= /usr/X11/include X11_INCDIR= /opt/X11/include -# CWARN - Silence warnings that ${CWARN} would normally complain about -# CSILENCE -Compiler warnings +# Common C compiler warnings to silence # -ifeq ($(CC),clang) - -# clang CSILENCE and CWARN -# -#CSILENCE= +CSILENCE= #CSILENCE= -Wno-implicit-int -CSILENCE= -Wno-missing-variable-declarations -Wno-missing-prototypes -Wno-disabled-macro-expansion \ - -Wno-conversion -Wno-unused-value -Wno-empty-body -Wno-conversion -Wno-misleading-indentation \ - -Wno-comment -Wno-unknown-warning-option -# -#CWARN= $CSILENCE} -#CWARN= -Wall $CSILENCE} -#CWARN= -Wall -Wextra $CSILENCE} -#CWARN= -Wall -Wextra -pedantic ${CSILENCE} -#CWARN= -Wall -Wextra -Weverything $CSILENCE} -CWARN= -Wall -Wextra -Weverything -pedantic ${CSILENCE} -else -ifeq ($(CC),gcc) - -# gcc CSILENCE and CWARN +# Common C compiler warning flags # -#CSILENCE= -#CSILENCE= -Wno-implicit-int -CSILENCE= -Wno-disabled-macro-expansion -Wno-conversion -Wno-unused-value -Wno-binding-in-condition \ - -Wno-empty-body -Wno-comment -Wno-misleading-indentation -Wno-unknown-warning-option -# -#CWARN= $CSILENCE} -#CWARN= -Wall $CSILENCE} -#CWARN= -Wall -Wextra $CSILENCE} +#CWARN= ${CSILENCE} +#CWARN= -Wall ${CSILENCE} +#CWARN= -Wall -Wextra ${CSILENCE} CWARN= -Wall -Wextra -pedantic ${CSILENCE} -else - -# default CSILENCE and WARN -# -#CSILENCE= -#CSILENCE= -Wno-implicit-int -CSILENCE= -Wno-disabled-macro-expansion -Wno-conversion -Wno-unused-value -Wno-empty-body \ - -Wno-comment -Wno-misleading-indentation -Wno-unknown-warning-option -# -#CWARN= $CSILENCE} -#CWARN= -Wall $CSILENCE} -#CWARN= -Wall -Wextra $CSILENCE} -CWARN= -Wall -Wextra -pedantic ${CSILENCE} -#CWARN= -Wall -Wextra -Weverything $CSILENCE} -#CWARN= -Wall -Wextra -Weverything -pedantic ${CSILENCE} - -endif -endif - -# compiler standard +# Compiler standard # #CSTD= #CSTD= -ansi -CSTD= -std=c11 +CSTD= -std=gnu17 -# compiler bit architecture +# Compiler bit architecture # # Some entries require 32-bitness: # ARCH= -m32 @@ -362,21 +90,21 @@ CSTD= -std=c11 # ARCH= -# defines that are needed to compile +# Defines that are needed to compile # #CDEFINE= -#CDEFINE= -DIOCCC CDEFINE= -D_POSIX_C_SOURCE=200809L -# include files that are needed to compile +# Include files that are needed to compile # CINCLUDE= #CINCLUDE= -include stdlib.h #CINCLUDE= -include stdio.h #CINCLUDE= -include stdlib.h -include stdio.h #CINCLUDE= -I ${X11_INCDIR} +#CINCLUDE= `${SDL2_CONFIG} --cflags` -# optimization +# Optimization # # Most compiles will safely use -O2. Some can use only -O1 or -O. # A few compilers have broken optimizers or this entry make break @@ -389,40 +117,58 @@ CINCLUDE= #OPT= -O2 OPT= -O3 -# default flags for ANSI C compilation +# Default flags for ANSI C compilation # CFLAGS= ${CSTD} ${CWARN} ${ARCH} ${CDEFINE} ${CINCLUDE} ${OPT} # Libraries needed to build # LIBS= -#LIBS= -L ${X11_LIBDIR} +#LIBS= -lm +#LIBS= -L ${X11_LIBDIR} -lX11 +#LIBS= `${SDL2_CONFIG} --libs` -# ANSI compiler -# -# Set CC to the name of your ANSI compiler. -# -# Some entries seem to need gcc. If you have gcc, set -# both CC and MAY_NEED_GCC to gcc. -# -# If you do not have gcc, set CC to the name of your ANSI compiler, and -# set MAY_NEED_GCC to either ${CC} (and hope for the best) or to just : -# to disable such programs. +# C compiler to use # CC= cc -#CC= clang -MAY_NEED_GCC= gcc +#CC=clang +#CC=gcc + +# Compiler add-ons or replacements for clang only +# +ifeq ($(CC),clang) +# +CSILENCE= -Wno-implicit-int-conversion -Wno-missing-prototypes \ + -Wno-missing-variable-declarations -Wno-poison-system-directories \ + -Wno-shorten-64-to-32 +# +CWARN+= -Weverything +# +endif + +# Specific add-ons or replacements for gcc only +# +ifeq ($(CC),gcc) +# +#CSILENCE+= +# +#CWARN+= +# +endif ############################## # Special flags for this entry ############################## # -OBJ= prog.o recode.o +ENTRY= ferguson2 +PROG= prog +# +OBJ= ${PROG}.o DATA= chocolate-cake.md enigma.1 input.txt obfuscation.key \ obfuscation.md obfuscation.txt recode.1 recode.md \ try.this.txt -TARGET= prog recode +TARGET= ${PROG} # ALT_OBJ= ALT_TARGET= @@ -432,18 +178,19 @@ ALT_TARGET= # build the entry ################# # -all: ${TARGET} ${DATA} +all: data ${TARGET} @${TRUE} -prog: prog.c - ${CC} ${CFLAGS} $< -o $@ ${LIBS} +.PHONY: all alt data everything clean clobber install \ + love haste waste maker easter_egg sandwich \ + supernova deep_magic magic charon pluto -recode: recode.c +${PROG}: ${PROG}.c ${CC} ${CFLAGS} $< -o $@ ${LIBS} # alternative executable # -alt: ${ALT_TARGET} +alt: data ${ALT_TARGET} @${TRUE} # data files @@ -451,13 +198,15 @@ alt: ${ALT_TARGET} data: ${DATA} @${TRUE} +# both all and alt +# +everything: all alt + ############### # utility rules ############### # -everything: all alt - clean: ${RM} -f ${OBJ} ${ALT_OBJ} @-if [ -f indent.c ]; then \ @@ -472,27 +221,13 @@ clobber: clean echo 'ate sandwich'; \ fi -nuke: clobber - @${TRUE} - -dist_clean: nuke - @${TRUE} - install: - @echo "Surely you are performing, Dr. Science!" + @echo "Dr. Spock says that is not logical!" @${TRUE} -test: - @: # dummy target for my dev builds - -# backwards compatibility +# you may be able to misunderstand the source by reading indent.c # -build: all - @${TRUE} - -# you may be able to mis-understand the source by reading indent.c -# -indent.c: prog.c +indent.c: ${PROG}.c @if which "${GINDENT}" >/dev/null 2>&1; then \ echo ${RM} -f $@; \ ${RM} -f $@; \ @@ -504,7 +239,7 @@ indent.c: prog.c echo "${INDENT} < $< > $@"; \ ${INDENT} < $< > $@; \ else \ - echo "no intent prog found, ident $< yourself, sorry"; \ + echo "no intent tool found, ident $< yourself, sorry"; \ echo "exit 1"; \ exit 1; \ fi @@ -526,26 +261,21 @@ waste: @echo 'haste' @${TRUE} -make: - @echo 'We encourage you to attend a maker faire' +maker: + @echo 'Participate in a maker faire' @${TRUE} easter_egg: - @echo you expected to often mis-understand this $${RANDOM} magic - @echo chongo '' "/\\oo/\\" - @echo Eggy and Kitty + @echo "you expected to often misunderstand this $${RANDOM} magic" + @echo "chongo '' /\\oo/\\" + @echo "Eggy" -fabricate fashion form frame manufacture produce: make - @${TRUE} - -sandwich: +sandwich: easter_egg @if [ `id -u` -eq 0 ]; then \ echo 'Okay.'; \ - echo $${RANDOM}`date +%s`$${RANDOM} | \ - ${SHASUM} -a 512256 | \ - ${SED} -e 's/ .*//' > $@; \ + echo "$${RANDOM}`date +%s`$${RANDOM}" > $@; \ else \ - echo 'Reall?!? Make it yourself.'; \ + echo 'What? Make it yourself.'; \ exit 1; \ fi @@ -553,47 +283,47 @@ sandwich: # as well as the West Coast Computer Faire and # you might be confused different. :-) # -supernova: nuke +supernova: sandwich @-if [ -r .code_anal ]; then \ ${RM} -f .code_anal_v6; \ else \ - echo "planet deniers, like a few silly IAU members, are so cute when they try to defend their logic"; \ + echo "planet deniers, like some members of the IAU, are so cute when they try to defend their logic"; \ fi - @echo A $@ helps ${MAKE} the elements that help form planets + @echo "A $@ helps ${MAKE} the elements that help form planets" @${TRUE} -deep_magic: +deep_magic: supernova @-if [ -r .code_anal ]; then \ - ccode_analysis --deep_magic 253d8c80830e2df66c018820004b3d4939821bbd7d781fc50d9e633797e44f65d1d62c707bb7e5a82c328a37bbf9ecb4c46fb56aa3f08641fcf45d10ba3c6081 --FNV1a_hash_512_bit "prog"; \ + ccode_analysis --deep_magic 7889066cdbdf09b0408021754586e895be641cc9be29e7eafd3ca65359541f17 \ + --FNV1a_hash_512_bit -v2 "${PROG}" "${PROG}.c"; \ else \ echo "Wrong! Do it again!"; \ - sleep 1; \ + sleep 2; \ echo "Wrong! Do it again!"; \ - sleep 1; \ + sleep 2; \ echo "Wrong! Do it again!"; \ fi @${TRUE} magic: deep_magic @-if [ -r .code_anal ]; then \ - ccode_analysis --level 391581 --mode 216193 --state Riesel --FNV1a_hash_512_bit "prog"; \ + ccode_analysis --level 20003 --mode 5717175 --FNV1a_hash_512_bit -v2 "${PROG}" "${PROG}.c"; \ else \ echo "If you don't eat yer meat, you can't have any pudding!"; \ echo "How can you have any pudding if you don't eat yer meat?!"; \ - echo "Be careful with that axe, Eugene."; \ fi @${TRUE} # The IOCCC resident astronomer states # -charon: supernova - @echo $@ is a dwarf planet - @echo dwarf is a type of planet - @echo therefore we continue to tell the IAU that $@ is a planet +charon: magic + @echo "$@ is a dwarf planet" + @echo "dwarf is a type of planet" + @echo "therefore IAU, $@ is a planet" -pluto: supernova +pluto: charon ${MAKE} charon - @echo $@ is a dwarf planet - @echo dwarf is a type of planet - @echo therefore, $@ is a planet - @echo having lots of planets is good feature because supernovae can help ${MAKE} a lot of them + @echo "$@ is a dwarf planet" + @echo "dwarf is a type of planet" + @echo "therefore, $@ is a planet" + @echo "having lots of planets is good feature because supernovae can help ${MAKE} a lot of them" diff --git a/2020/ferguson2/README.md b/2020/ferguson2/README.md index b0642e67b..8bde9f5a5 100644 --- a/2020/ferguson2/README.md +++ b/2020/ferguson2/README.md @@ -1,36 +1,43 @@ # Most enigmatic +``` Cody Boone Ferguson Twitter: @xexyl +``` +## To build: -The code for this entry can be found in prog.c +```sh +make +``` -## Judges' comments: -### To use: +### To run: - make - ./prog +```sh +./prog +``` ### Try: - # IOCCC obfuscated! - echo IOCCC | ./prog +```sh +# IOCCC obfuscated! +echo IOCCC | ./prog - # IOCCC obfuscated and de-obfuscated! - echo IOCCC | ./prog | ./prog +# IOCCC obfuscated and de-obfuscated! +echo IOCCC | ./prog | ./prog - # more input fun - ./prog - < try.this.txt 2>/dev/null +# more input fun +./prog - < try.this.txt 2>/dev/null - # more obfuscated fun - echo testing test tests | ./recode - echo testing test tests | ./recode | ./prog - 2>/dev/null - echo testing test tests | ./recode | ./prog - 2>/dev/null | ./recode - echo testing test tests | ./recode | ./prog - 2>/dev/null | ./recode | ./prog - 2>/dev/null +# more obfuscated fun +echo testing test tests | ./recode +echo testing test tests | ./recode | ./prog - 2>/dev/null +echo testing test tests | ./recode | ./prog - 2>/dev/null | ./recode +echo testing test tests | ./recode | ./prog - 2>/dev/null | ./recode | ./prog - 2>/dev/null +``` -### Selected Judges Remarks: +## Judges' comments: This code is an enigma. Try to decode it! @@ -40,7 +47,9 @@ There is a good deal of useful documentation that is provided with this entry: A useful man page for this entry. To render, try: - man ./enigma.1 +```sh +man ./enigma.1 +``` * recode.md ([recode.html][]) @@ -54,6 +63,7 @@ Because most of us could use some *Double-layered Chocolate Fudge Cake*! [chocolate-cake.html]: chocolate-cake.html ## Author's comments: + My remarks about my Heer 'Army' and Luftwaffe 'Air Force' Enigma simulator for the 27th IOCCC. @@ -137,19 +147,21 @@ loop! The author (Nathan) of the [1992 Worst Abuse of the Rules][] had this to say: - This program is a hello world text encrypter/decrypter. It uses an - enigma (I think) style encryption algorithm, where the encryption - key character is modified by a value, determined from the previous - character. Non-printable characters (those with ASCII values < ' ' - or > 0x7e) are passed unaltered, thus any kind of file may be - successfully processed, but if the original is printable, the - processed file will be too. The input is read from stdin, and the - output presented to stdout. The key, a text string, is presented as - a command argument. This is optional, and if omitted, the file is - self-{de,en}crypted. To specify decryption, a "-" should be given - before the key. (Actually encryption and decryption proper inverse - operations, so you can use decrypt to scramble and encrypt to - descramble, if you're perverse.) +``` +This program is a hello world text encrypter/decrypter. It uses an +enigma (I think) style encryption algorithm, where the encryption +key character is modified by a value, determined from the previous +character. Non-printable characters (those with ASCII values < ' ' +or > 0x7e) are passed unaltered, thus any kind of file may be +successfully processed, but if the original is printable, the +processed file will be too. The input is read from stdin, and the +output presented to stdout. The key, a text string, is presented as +a command argument. This is optional, and if omitted, the file is +self-{de,en}crypted. To specify decryption, a "-" should be given +before the key. (Actually encryption and decryption proper inverse +operations, so you can use decrypt to scramble and encrypt to +descramble, if you're perverse.) +``` But the Enigma algorithm is more complex than that and my entry can encipher and decipher text in the manner of the Enigma machines of the Army (Heer) and Air @@ -174,7 +186,9 @@ the result (after finishing the enciphering). If you run it like: - ./prog - +```sh +./prog - +``` It will prompt you for the settings of the machine (example below). @@ -198,31 +212,32 @@ general program as well as how to use the two winning entries of the Morse code that I referred to earlier: - $ ./prog - - Ring 1: 3 - Setting 1: I - Position 1: O - Ring 2: 1 - Setting 2: C - Position 2: C - Ring 3: 5 - Setting 3: C - Position 3: Z - Reflector: 2 - Plugboard pair 1: CO - Plugboard pair 2: DE - Plugboard pair 3: SN - Plugboard pair 4: XY - Plugboard pair 5: MS - Plugboard pair 6: AT - Plugboard pair 7: VF - Plugboard pair 8: UR - Plugboard pair 9: KL - Plugboard pair 10: BJ - IOCCC - ^D - CFDRG - +```sh +$ ./prog - +Ring 1: 3 +Setting 1: I +Position 1: O +Ring 2: 1 +Setting 2: C +Position 2: C +Ring 3: 5 +Setting 3: C +Position 3: Z +Reflector: 2 +Plugboard pair 1: CO +Plugboard pair 2: DE +Plugboard pair 3: SN +Plugboard pair 4: XY +Plugboard pair 5: MS +Plugboard pair 6: AT +Plugboard pair 7: VF +Plugboard pair 8: UR +Plugboard pair 9: KL +Plugboard pair 10: BJ +IOCCC +^D +CFDRG +``` Notice that all output except the deciphered/enciphered text is sent to stdout. @@ -231,17 +246,20 @@ default settings; as the judges suggest this invocation I will not show it here. But you can also type it out like this: - $ ./prog - IOCCC - UUMMX - +```sh +$ ./prog +IOCCC +UUMMX +``` The IOCCC comes from stdin; the `UUMMX` is written to stdout. If I compile the 2014 entry and copy it to my local directory as `vik` I might do: - $ echo TEST|./prog |./vik | mplayer -demuxer rawaudio - +```sh +$ echo TEST|./prog |./vik | mplayer -demuxer rawaudio - +``` And you would hear Morse code of the Enigma output of 'TEST' (i.e. `KCWV`). Or perhaps not in this case. I'm not sure: I discovered a bug in that entry @@ -250,41 +268,53 @@ perhaps not in this case. I'm not sure: I discovered a bug in that entry For example I can use the syntax provided in the winning remarks along with my entry to write it to a file. Say: - $ echo TEST|./prog |./vik > test.raw - $ ./vik e < test.raw | ./prog - LEST +```sh +$ echo TEST|./prog |./vik > test.raw +$ ./vik e < test.raw | ./prog +LEST +``` Why did that happen? This shows more details: - $ ./vik e < test.raw - SCWV +```sh +$ ./vik e < test.raw +SCWV +``` However as can be seen the first char is wrong: - $ echo TEST|./prog - KCWV +```sh +$ echo TEST|./prog +KCWV +``` And piping the original output to my entry itself you get the original input: - $ echo TEST | ./prog | ./prog - TEST +```sh +$ echo TEST | ./prog | ./prog +TEST +``` I'm not sure what causes that or if there's a way to fix it but that's the idea anyway. Neither do I know if the original transcoding is correct. What if I use the input string 'LEST' instead? In that case it worked fine: - $ echo LEST | ./prog | ./vik > lest.raw - $ ./vik e < lest.raw | ./prog - LEST +```sh +$ echo LEST | ./prog | ./vik > lest.raw +$ ./vik e < lest.raw | ./prog +LEST +``` But there's one obvious question, right? Let's try the most important one: - $ echo IOCCC | ./prog | ./vik > ioccc.raw - $ ./vik e < ioccc.raw - UUMMX - $ ./vik e < ioccc.raw | ./prog - IOCCC +```sh +$ echo IOCCC | ./prog | ./vik > ioccc.raw +$ ./vik e < ioccc.raw +UUMMX +$ ./vik e < ioccc.raw | ./prog +IOCCC +``` Phew! The program redeemed itself after the test failure! :) @@ -294,8 +324,10 @@ too. Notice also how it showed the same output that my program gave it - `UUMMX` What about the other Morse code entry? - $ echo IOCCC | ./prog | ./dorssel - ..- ..- -- -- -..- +```sh +$ echo IOCCC | ./prog | ./dorssel +..- ..- -- -- -..- +``` ### The recode.c configurator @@ -331,26 +363,28 @@ The parser is in a sense rather rudimentary but allows for both interactive and automatic (e.g. via the recode program) input. This does mean that something like the following can happen: - $ ./prog - - Ring 1: 1AB - Setting 1: Position 1: Ring 2: 2CD - Setting 2: Position 2: Ring 3: 3 - Setting 3: A - Position 3: B - Reflector: 1A - Plugboard pair 1: BC - Plugboard pair 2: .. - Plugboard pair 3: .. - Plugboard pair 4: DE - Plugboard pair 5: FG - Plugboard pair 6: HI - Plugboard pair 7: JK - Plugboard pair 8: LM - Plugboard pair 9: NO - Plugboard pair 10: PQ - IOCCC - WD - SIRDK +```sh +$ ./prog - +Ring 1: 1AB +Setting 1: Position 1: Ring 2: 2CD +Setting 2: Position 2: Ring 3: 3 +Setting 3: A +Position 3: B +Reflector: 1A +Plugboard pair 1: BC +Plugboard pair 2: .. +Plugboard pair 3: .. +Plugboard pair 4: DE +Plugboard pair 5: FG +Plugboard pair 6: HI +Plugboard pair 7: JK +Plugboard pair 8: LM +Plugboard pair 9: NO +Plugboard pair 10: PQ +IOCCC +WD +SIRDK +``` First of all: what is that WD? I didn't type that but it appeared it seems due to too much input that triggers this (it happens when I hit ctrl-d to end @@ -387,11 +421,12 @@ should help you remember (though not at this time in our world it might help you later on?). This might become even more useful after the challenge is accepted, accomplished and made use of! :) - $ echo ABC | ./prog - GYM - $ echo ABC | ./prog | ./prog - ABC - +```sh +$ echo ABC | ./prog +GYM +$ echo ABC | ./prog | ./prog +ABC +``` ### On the source code layout @@ -414,8 +449,10 @@ fix but I consider this inconsequential). As for recode.c though I really love this: - /\ - / This is *not* what you think: +``` + /\ +/ This is *not* what you think: +``` ...because it seems so wrong in C code at first glance. @@ -427,11 +464,15 @@ It's an Enigma simulator! Isn't that proof that it's obfuscated itself?! :) Silliness aside [obfuscation.txt][] has some of the ways I think this entry is obfuscated. To decipher try: - ./recode -Robfuscation.key -fobfuscation.txt | ./prog - 2>/dev/null > obfuscation.md +```sh +./recode -Robfuscation.key -fobfuscation.txt | ./prog - 2>/dev/null > obfuscation.md +``` To encipher: - ./recode -Robfuscation.key -fobfuscation.md | ./prog - 2>/dev/null > obfuscation.txt +```sh +./recode -Robfuscation.key -fobfuscation.md | ./prog - 2>/dev/null > obfuscation.txt +``` The file [obfuscation.key][] is the key to decipher/encipher [obfuscation.txt][]. @@ -446,9 +487,10 @@ fun way to explore this entry. As for the [obfuscation.key][] file if you observe the contents you'll find the word OBFUSCATION: - 2OB5FU1SC2ATIONCDEFGHJKLMPQRYZ - OB FU SC ATION - +``` +2OB5FU1SC2ATIONCDEFGHJKLMPQRYZ + OB FU SC ATION +``` ### Bugs, limitations, differences from the real Enigma machines and general notes @@ -467,11 +509,13 @@ program *however does validate this* (except when reading in settings via the to B then no other letters can connect to A or B. Earlier there wasn't proper detection and this caused invalid output. - Why only 10 pairs when the German alphabet has 26 letters? It's - theoretically possible to have 13 but the Enigma typically had 10 pairs. - It's easy enough to update my entry to do this once you de-obfuscate it but - I'm not helping there (and in fact I don't think I could any more even if I - wanted to - at least not easily!). +``` +Why only 10 pairs when the German alphabet has 26 letters? It's +theoretically possible to have 13 but the Enigma typically had 10 pairs. +It's easy enough to update my entry to do this once you de-obfuscate it but +I'm not helping there (and in fact I don't think I could any more even if I +wanted to - at least not easily!). +``` * It does not obviously have the clicking sound associated with the moving parts of the real machine. I think it would be annoying to have this as it @@ -599,8 +643,10 @@ simulator make sure to use Rotors I, II and III and the starting positions at B, B and C respectively (as in left, centre, right). To do this click the button at the top right that looks like: - o-> - <-o +``` +o-> +<-o +``` And then select the rotors. Next click the button again at the left of the rotor selection 'screen'. Then use the arrow buttons above each rotor to set @@ -620,7 +666,9 @@ determine if the ring settings being different from ABC would cause a problem Going back to the configuring the online simulator try inputting the text IOCCC and you'll see the resulting text being: - UUMMX +``` +UUMMX +``` Which is exactly as my entry shows! So at least for the starting position BBC and an empty plugboard and the other defaults in my entry (which appear to be @@ -737,11 +785,10 @@ as well as the award titles. And yes indeed 'most of us could use [Double-layered Chocolate Fudge Cake]: chocolate-cake.html +## Copyright: ------------------------------------------------------------------------------------------------------ (c) Copyright 1984-2020, [Leo Broukhis, Simon Cooper, Landon Curt Noll][judges] - All rights reserved This work is licensed under a [Creative Commons Attribution-ShareAlike 3.0 Unported License][cc]. [judges]: http://www.ioccc.org/judges.html [cc]: http://creativecommons.org/licenses/by-sa/3.0/ ------------------------------------------------------------------------------------------------------