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fix Makefile and README.md for 2019/yang

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Landon Curt Noll committed 2023-03-25 04:28:50 -07:00
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2019/yang/.gitignore
+1 -1
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@@ -1,5 +1,5 @@
prog
a a
b b
c c
d d
prog
2019/yang/Makefile
+138 -333
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@@ -1,14 +1,41 @@
#!/usr/bin/env make #!/usr/bin/env make
# #
# 2019 makefile # IOCCC 2019 winning entry - yang
################################################################################
# #
# This work by Landon Curt Noll, Simon Cooper, and Leonid A. Broukhis # Regarding individual entries:
# is licensed under: #
# 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. # Creative Commons Attribution-ShareAlike 3.0 Unported License.
# #
# See: http://creativecommons.org/licenses/by-sa/3.0/ # See: http://creativecommons.org/licenses/by-sa/3.0/
############################# #############################
# shell used by this Makefile # shell used by this Makefile
############################# #############################
@@ -19,262 +46,7 @@ SHELL= bash
# common tool locations # common tool locations
####################### #######################
# #
A2P= a2p include ../../var.mk
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
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
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
# Set X11_LIBDIR to the directory where the X11 library resides # Set X11_LIBDIR to the directory where the X11 library resides
# #
@@ -288,28 +60,25 @@ X11_LIBDIR= /opt/X11/lib
#X11_INCDIR= /usr/X11/include #X11_INCDIR= /usr/X11/include
X11_INCDIR= /opt/X11/include X11_INCDIR= /opt/X11/include
# Compiler warnings # Common C compiler warnings to silence
#
#CWARN=
#CWARN= -Wall
#CWARN= -Wall -Wextra
CWARN= -Wall -Wextra -pedantic ${CSILENCE}
#CWARN= -Wall -Wextra -Weverything
#CWARN= -Wall -Wextra -Weverything -pedantic
#CWARN= -Wall -Wextra -Weverything -pedantic ${CSILENCE}
# Silence warnings that ${CWARN} would normally complain about
# #
CSILENCE= CSILENCE=
#CSILENCE= -Wno-implicit-int #CSILENCE= -Wno-implicit-int
# compiler standard # Common C compiler warning flags
#
#CWARN= ${CSILENCE}
#CWARN= -Wall ${CSILENCE}
#CWARN= -Wall -Wextra ${CSILENCE}
CWARN= -Wall -Wextra -pedantic ${CSILENCE}
# Compiler standard
# #
#CSTD= #CSTD=
#CSTD= -ansi #CSTD= -ansi
CSTD= -std=c11 CSTD= -std=gnu17
# compiler bit architecture # Compiler bit architecture
# #
# Some entries require 32-bitness: # Some entries require 32-bitness:
# ARCH= -m32 # ARCH= -m32
@@ -321,20 +90,21 @@ CSTD= -std=c11
# #
ARCH= ARCH=
# defines that are needed to compile # Defines that are needed to compile
# #
CDEFINE= CDEFINE=
#CDEFINE= -DIOCCC=26 #CDEFINE= -DIOCCC
# include files that are needed to compile # Include files that are needed to compile
# #
CINCLUDE= CINCLUDE=
#CINCLUDE= -include stdlib.h #CINCLUDE= -include stdlib.h
#CINCLUDE= -include stdio.h #CINCLUDE= -include stdio.h
#CINCLUDE= -include stdlib.h -include stdio.h #CINCLUDE= -include stdlib.h -include stdio.h
#CINCLUDE= -I ${X11_INCDIR} #CINCLUDE= -I ${X11_INCDIR} -I ${X11_INCDIR}/X11
#CINCLUDE= `${SDL2_CONFIG} --cflags`
# optimization # Optimization
# #
# Most compiles will safely use -O2. Some can use only -O1 or -O. # Most compiles will safely use -O2. Some can use only -O1 or -O.
# A few compilers have broken optimizers or this entry make break # A few compilers have broken optimizers or this entry make break
@@ -347,38 +117,57 @@ CINCLUDE=
#OPT= -O2 #OPT= -O2
OPT= -O3 OPT= -O3
# default flags for ANSI C compilation # Default flags for ANSI C compilation
# #
CFLAGS= ${CSTD} ${CWARN} ${ARCH} ${CDEFINE} ${CINCLUDE} ${OPT} CFLAGS= ${CSTD} ${CWARN} ${ARCH} ${CDEFINE} ${CINCLUDE} ${OPT}
# Libraries needed to build # Libraries needed to build
# #
LIBS= LIBS=
#LIBS= -L ${X11_LIBDIR} #LIBS= -lm
#LIBS= -L ${X11_LIBDIR} -lX11
#LIBS= `${SDL2_CONFIG} --libs`
# ANSI compiler # C compiler to use
#
# 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 ${CC} (and hope for the best) or to just :
# to disable such programs.
# #
CC= cc CC= cc
#CC=clang #CC=clang
MAY_NEED_GCC= gcc #CC=gcc
# Compiler add-ons or replacements for clang only
#
ifeq ($(CC),clang)
#
CSILENCE+= -Wno-missing-prototypes -Wno-missing-variable-declarations \
-Wno-poison-system-directories -Wno-shadow -Wno-sign-conversion \
-Wno-strict-prototypes
#
CWARN+= -Weverything
#
endif
# Specific add-ons or replacements for gcc only
#
ifeq ($(CC),gcc)
#
#CSILENCE+=
#
#CWARN+=
#
endif
############################## ##############################
# Special flags for this entry # Special flags for this entry
############################## ##############################
# #
OBJ= prog.o ENTRY= yang
DATA= PROG= prog
TARGET= prog #
OBJ= ${PROG}.o
CSRC= ${PROG}.o
DATA= sample_input.txt
TARGET= ${PROG}
# #
ALT_OBJ= ALT_OBJ=
ALT_TARGET= ALT_TARGET=
@@ -388,15 +177,19 @@ ALT_TARGET=
# build the entry # build the entry
################# #################
# #
all: ${TARGET} ${DATA} all: data ${TARGET}
@${TRUE} @${TRUE}
prog: prog.c .PHONY: all alt data everything clean clobber install \
love haste waste maker easter_egg sandwich \
supernova deep_magic magic charon pluto
${PROG}: ${PROG}.c
${CC} ${CFLAGS} $< -o $@ ${LIBS} ${CC} ${CFLAGS} $< -o $@ ${LIBS}
# alternative executable # alternative executable
# #
alt: ${ALT_TARGET} alt: data ${ALT_TARGET}
@${TRUE} @${TRUE}
# data files # data files
@@ -404,15 +197,21 @@ alt: ${ALT_TARGET}
data: ${DATA} data: ${DATA}
@${TRUE} @${TRUE}
# both all and alt
#
everything: all alt
############### ###############
# utility rules # utility rules
############### ###############
# #
everything: all alt
clean: clean:
${RM} -f ${OBJ} ${ALT_OBJ} ${RM} -f ${OBJ} ${ALT_OBJ}
@-if [ -f indent.c ]; then \
echo ${RM} -f indent.c; \
${RM} -f indent.c; \
fi
clobber: clean clobber: clean
${RM} -f ${TARGET} ${ALT_TARGET} ${RM} -f ${TARGET} ${ALT_TARGET}
@@ -421,20 +220,28 @@ clobber: clean
echo 'ate sandwich'; \ echo 'ate sandwich'; \
fi fi
nuke: clobber
@${TRUE}
dist_clean: nuke
@${TRUE}
install: install:
@echo "Surely you are performing, Dr. May!" @echo "Dr. Spock says that is not logical!"
@${TRUE} @${TRUE}
# backwards compatibility # you may be able to misunderstand the source by reading indent.c
# #
build: all indent.c: ${PROG}.c
@${TRUE} @if which "${GINDENT}" >/dev/null 2>&1; then \
echo ${RM} -f $@; \
${RM} -f $@; \
echo "${GINDENT} < $< > $@"; \
${GINDENT} < $< > $@; \
elif which "${INDENT}" >/dev/null 2>&1; then \
echo ${RM} -f $@; \
${RM} -f $@; \
echo "${INDENT} < $< > $@"; \
${INDENT} < $< > $@; \
else \
echo "no intent tool found, ident $< yourself, sorry"; \
echo "exit 1"; \
exit 1; \
fi
################## ##################
@@ -453,22 +260,19 @@ waste:
@echo 'haste' @echo 'haste'
@${TRUE} @${TRUE}
make: maker:
@echo 'Attend a maker faire' @echo 'Participate in a maker faire'
@${TRUE} @${TRUE}
easter_egg: easter_egg:
@echo you expected to often mis-understand this $${RANDOM} magic @echo "you expected to often misunderstand this $${RANDOM} magic"
@echo chongo '<was here>' "/\\oo/\\" @echo "chongo '<was here>' /\\oo/\\"
@echo Eggy @echo "Eggy"
fabricate fashion form frame manufacture produce: make sandwich: easter_egg
@${TRUE}
sandwich:
@if [ `id -u` -eq 0 ]; then \ @if [ `id -u` -eq 0 ]; then \
echo 'Okay.'; \ echo 'Okay.'; \
echo $${RANDOM}`date +%s`$${RANDOM} > $@; \ echo "$${RANDOM}`date +%s`$${RANDOM}" > $@; \
else \ else \
echo 'What? Make it yourself.'; \ echo 'What? Make it yourself.'; \
exit 1; \ exit 1; \
@@ -478,18 +282,19 @@ sandwich:
# as well as the West Coast Computer Faire and # as well as the West Coast Computer Faire and
# you might be confused different. :-) # you might be confused different. :-)
# #
supernova: nuke supernova: sandwich
@-if [ -r .code_anal ]; then \ @-if [ -r .code_anal ]; then \
${RM} -f .code_anal_v6; \ ${RM} -f .code_anal_v6; \
else \ else \
echo "planet deniers, like some members of the IAU, 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 fi
@echo A $@ helps ${MAKE} the elements that help form planets @echo "A $@ helps ${MAKE} the elements that help form planets"
@${TRUE} @${TRUE}
deep_magic: deep_magic: supernova
@-if [ -r .code_anal ]; then \ @-if [ -r .code_anal ]; then \
ccode_analysis --deep_magic fc6b6af226b7cc598de3d48fc20ed0bd54f7b4f7f0f651a32b9cf8345b2a3b3f --FNV1a_hash_512_bit "prog"; \ ccode_analysis --deep_magic 7889066cdbdf09b0408021754586e895be641cc9be29e7eafd3ca65359541f17 \
--FNV1a_hash_512_bit -v2 "${PROG}" "${PROG}.c"; \
else \ else \
echo "Wrong! Do it again!"; \ echo "Wrong! Do it again!"; \
sleep 2; \ sleep 2; \
@@ -501,7 +306,7 @@ deep_magic:
magic: deep_magic magic: deep_magic
@-if [ -r .code_anal ]; then \ @-if [ -r .code_anal ]; then \
ccode_analysis --level 391581 --mode 216193 --FNV1a_hash_512_bit "prog"; \ ccode_analysis --level 20003 --mode 5717175 --FNV1a_hash_512_bit -v2 "${PROG}" "${PROG}.c"; \
else \ else \
echo "If you don't eat yer meat, you can't have any pudding!"; \ 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 "How can you have any pudding if you don't eat yer meat?!"; \
@@ -510,14 +315,14 @@ magic: deep_magic
# The IOCCC resident astronomer states # The IOCCC resident astronomer states
# #
charon: supernova charon: magic
@echo $@ is a dwarf planet @echo "$@ is a dwarf planet"
@echo dwarf is a type of planet @echo "dwarf is a type of planet"
@echo therefore IAU, $@ is a planet @echo "therefore IAU, $@ is a planet"
pluto: supernova pluto: charon
${MAKE} charon ${MAKE} charon
@echo $@ is a dwarf planet @echo "$@ is a dwarf planet"
@echo dwarf is a type of planet @echo "dwarf is a type of planet"
@echo therefore, $@ is a planet @echo "therefore, $@ is a planet"
@echo get used to having lots of planets becasue supernovae can ${MAKE} a lot of them @echo "having lots of planets is good feature because supernovae can help ${MAKE} a lot of them"
2019/yang/README.md
+80 -54
View File
@@ -1,91 +1,106 @@
# Most in need of transparency # Most in need of transparency
Don Yang Don Yang
<http://uguu.org/> <http://uguu.org/>
# To build:
## Judges' comments: ```sh
make
```
## To build: ### To run:
make all ```sh
./prog sample_input.txt a b c d
### To use: cat a
cat b
./prog sample_input.txt a b c d cat c
cat a cat d
cat b cat a b c d | ./prog
```
cat c
cat d
cat a b c d | ./prog
### Try: ### Try:
./prog prog.c a b c d e ```sh
./prog prog.c a b c d e
cat a cat a
cat b cat b
cat c cat c
cat d cat d
cat e cat e
cat a b c d e | ./prog cat a b c d e | ./prog
cat a b c d e | ./prog | diff - prog.c cat a b c d e | ./prog | diff - prog.c
```
### Selected Judges Remarks: ## Judges' comments:
Do you understand how this program works? Do you understand how this program works?
You may have to go over and over the output again. You may have to go over and over the output again.
## Author's comments: ## Author's comments:
# Summary
### Summary
Scramble/unscramble to single file: Scramble/unscramble to single file:
./prog original.txt > scrambled.txt ```sh
./prog original.txt > scrambled.txt
./prog < scrambled.txt > unscrambled.txt ./prog < scrambled.txt > unscrambled.txt
```
Scramble/unscramble to multiple files: Scramble/unscramble to multiple files:
./prog input.txt output1.txt output2.txt ... ```sh
./prog input.txt output1.txt output2.txt ...
cat output1.txt output2.txt ... | ./prog > unscrambled.txt cat output1.txt output2.txt ... | ./prog > unscrambled.txt
```
Re-scramble: Re-scramble:
./prog original.txt | ./prog - > scrambled1.txt ```sh
./prog original.txt | ./prog - | ./prog - > scrambled2.txt ./prog original.txt | ./prog - > scrambled1.txt
./prog original.txt | ./prog - | ./prog - | ... > scrambled3.txt ./prog original.txt | ./prog - | ./prog - > scrambled2.txt
./prog original.txt | ./prog - | ./prog - | ... > scrambled3.txt
```
Scramble slowly: Scramble slowly:
./prog input.txt | ruby prog.c ```sh
./prog input.txt | ruby prog.c
```
Input must be in UTF-8 encoding. Input must be in UTF-8 encoding.
# Details ### Details
This is a text scrambling utility. To scramble text, specify input This is a text scrambling utility. To scramble text, specify input
file name as the first argument: file name as the first argument:
./prog input.txt > output.txt ```sh
./prog input.txt > output.txt
```
If original input file was small enough to fit in your terminal, you If original input file was small enough to fit in your terminal, you
can simply use `cat` to unscramble the output text. can simply use `cat` to unscramble the output text.
cat output.txt ```sh
cat output.txt
```
It might seem like nothing was scrambled, but you can try passing the It might seem like nothing was scrambled, but you can try passing the
output through `strings(1)` and see that most of the original strings output through `strings(1)` and see that most of the original strings
@@ -95,19 +110,25 @@ printed in random order. This effect is more visible if there is a
delay after each character is printed. For convenience, an utility is delay after each character is printed. For convenience, an utility is
included in the source to output characters slowly: included in the source to output characters slowly:
./prog input.txt | ruby prog.c ```sh
./prog input.txt | ruby prog.c
```
Scrambling order is deterministic, but you can reshuffle the output by Scrambling order is deterministic, but you can reshuffle the output by
piping it through the same utility again, by specifying `-` as the piping it through the same utility again, by specifying `-` as the
first argument: first argument:
./prog input.txt | ./prog - | ./prog - | ... ```sh
./prog input.txt | ./prog - | ./prog - | ...
```
You can also split the input to multiple files, each getting a subset You can also split the input to multiple files, each getting a subset
of the original input characters: of the original input characters:
./prog input.txt output1.txt output2.txt ... ```sh
cat output1.txt output2.txt ... > unscrambled.txt ./prog input.txt output1.txt output2.txt ...
cat output1.txt output2.txt ... > unscrambled.txt
```
You can only unscramble files with `cat` if the input fits in a single You can only unscramble files with `cat` if the input fits in a single
terminal screen. If you don't know what will be the terminal size of terminal screen. If you don't know what will be the terminal size of
@@ -121,16 +142,20 @@ positions to be misaligned. But fear not, this utility also includes
unscrambling functionality. If no argument is specified, input will unscrambling functionality. If no argument is specified, input will
be read through stdin and unscrambled to stdout: be read through stdin and unscrambled to stdout:
./prog < scrambled.txt > unscrambled.txt ```sh
./prog < scrambled.txt > unscrambled.txt
```
Where this is useful is that if you scramble the input to multiple Where this is useful is that if you scramble the input to multiple
files and unscramble each output files individually, those output files and unscramble each output files individually, those output
files can be printed on transparencies and distributed separately. files can be printed on transparencies and distributed separately.
./prog input.txt output1.txt output2.txt output3.txt ```sh
./prog < output1.txt > layer1.txt ./prog input.txt output1.txt output2.txt output3.txt
./prog < output2.txt > layer2.txt ./prog < output1.txt > layer1.txt
./prog < output3.txt > layer3.txt ./prog < output2.txt > layer2.txt
./prog < output3.txt > layer3.txt
```
In other words, this is a utility for facilitating In other words, this is a utility for facilitating
[visual cryptography](https://en.wikipedia.org/wiki/Visual_cryptography). [visual cryptography](https://en.wikipedia.org/wiki/Visual_cryptography).
@@ -138,11 +163,13 @@ In other words, this is a utility for facilitating
This utility can also be used just for removing trailing whitespaces This utility can also be used just for removing trailing whitespaces
and expanding tabs to 8 spaces. and expanding tabs to 8 spaces.
./prog input.txt | ./prog ```sh
./prog input.txt | ./prog
```
# Features ### Features
## UTF-8 support ### UTF-8 support
A simple text scrambling utility might not have required a screenful A simple text scrambling utility might not have required a screenful
of code, but this particular one natively supports UTF-8. of code, but this particular one natively supports UTF-8.
@@ -158,7 +185,7 @@ be possible to unscramble those text back to the original using this
same utility, since the utility is self-consistent in how cursor same utility, since the utility is self-consistent in how cursor
positions are handled. positions are handled.
## Error handling $## Error handling
If any file can not be opened for reading or writing, an error is If any file can not be opened for reading or writing, an error is
printed to stderr, and the utility will exit with nonzero status. printed to stderr, and the utility will exit with nonzero status.
@@ -169,7 +196,7 @@ If input contains CR-LF end of line sequences, those CRs are silently
dropped. In fact, most control codes are silently ignored except line dropped. In fact, most control codes are silently ignored except line
feeds (preserved) and tabs (expanded to 8 spaces). feeds (preserved) and tabs (expanded to 8 spaces).
## Compatibility $## Compatibility
Verified to work and compiles without warnings on these environments: Verified to work and compiles without warnings on these environments:
@@ -179,7 +206,7 @@ Verified to work and compiles without warnings on these environments:
* clang 5.0.1 on Cygwin * clang 5.0.1 on Cygwin
* gcc 4.8.4 on Linux * gcc 4.8.4 on Linux
## Full version $## Full version
I tried really hard to make `prog.c` fit in a 80x25 terminal without I tried really hard to make `prog.c` fit in a 80x25 terminal without
wrapping. If I were not constrained by space, I would have made an wrapping. If I were not constrained by space, I would have made an
@@ -190,11 +217,10 @@ depending on `sizeof(int)`.
Violet is named after "Violet Evergarden", the character who is highly Violet is named after "Violet Evergarden", the character who is highly
skilled in writing letters. skilled in writing letters.
-------------------------------------------------------------------------------- ## Copyright:
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