fix Makefile, README.md and .gitignore for 2004/vik2
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@@ -1 +1,3 @@
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vik2
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vik2
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vik2_1.c
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vik2_2.c
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+321
-341
@@ -1,326 +1,3 @@
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#!/bin/make
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#
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# 2004 makefile
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#
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# Copyright (C) 2004, Landon Curt Noll, Simon Cooper, Peter Seebach
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# and Leonid A. Broukhis. All Rights Reserved. Permission for personal,
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# educational or non-profit use is granted provided this copyright and
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# notice are included in its entirety and remains unaltered. All other
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# uses must receive prior permission from the contest judges.
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# tool locations
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#
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SHELL= /bin/sh
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CP= cp
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CPP= cpp
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GUNZIP= gunzip
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LD= ld
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MAKE= make
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RM= rm
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SED= sed
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TAR= tar
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TRUE= true
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# Special flags for the gavin entry
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#
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# FYI: Older versions of GCC have a bug in -O2 optimization, hence -O1
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#
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GAVIN_OPT= -O1
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GAVIN_FLAGS=\
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'-DY(m)=*((int*)(m))'\
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'-DE(f,a,b,c)=((G((*)))(f))(a,b,c)'\
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'-DM=for(D=0;D<786432;D++)'\
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'-DZ=int i=0,j=0,h,n,p=393728,s=26739,C,D'\
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'-DV=0x90200'\
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'-DK=0'\
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'-DR=while((C=E(V-8,100,0,0))&3&&(D=E(V-8,96,0,0))|3){'\
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'-DL(c,d)=E(V+8,100,c,0);R}E(V+8,96,d,0);R}'
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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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#CINCLUDE= -I ${HOMEBREW_PREFIX}/include/SDL2
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# optimization
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#
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# Most compiles will safely use -O2. Some can use only -O1 or -O.
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# A few compilers have broken optimizers and thus you may
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# not want anything.
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#
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#OPT=
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#OPT= -O
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#OPT= -O1
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OPT= -O2
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# flags for ANSI compiles
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#
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# NOTE: Some ANSI compilers make use of -Xa to turn on ANSI mode,
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# others such as gcc may want -ansi, others (Compaq Tru64 Unix)
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# want -std1, and others may want nothing at all.
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# Adjust the CFLAGS line as needed.
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#
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# NOTE: Some compilers cannot optimize, or optimize some entries
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# incorrectly. You might want to turn on -O to see if your
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# compiler can handle them.
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#
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#
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#CFLAGS= -Xa ${OPT}
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#CFLAGS= -std1 $(OPT)
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CFLAGS= -ansi ${OPT}
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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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# Some entries seem to need gcc. If you have gcc, set
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# both CC and MAY_NEED_GCC to gcc.
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#
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# If you do not have gcc, set CC to the name of your ANSI compiler, and
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# set MAY_NEED_GCC to either ${CC} (and hope for the best) or to just :
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# to disable such programs.
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#
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CC= cc
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MAY_NEED_GCC= gcc
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# 2004 winners
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#
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WINNERS= anonymous arachnid burley gavare gavin hibachi hoyle jdalbec \
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kopczynski newbern omoikane schnitzi sds vik1 vik2
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CLEAN= anonymous_clean arachnid_clean burley_clean gavare_clean gavin_clean \
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hibachi_clean hoyle_clean jdalbec_clean kopczynski_clean \
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newbern_clean omoikane_clean schnitzi_clean sds_clean vik1_clean \
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vik2_clean
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CLOBBER= anonymous_clobber arachnid_clobber burley_clobber gavare_clobber \
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gavin_clobber hibachi_clobber hoyle_clobber jdalbec_clobber \
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kopczynski_clobber newbern_clobber omoikane_clobber schnitzi_clobber \
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sds_clobber vik1_clobber vik2_clobber
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ALT_NAMES= hoyle.orig kopczynski.orig
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DATA_FILES= arachnid_files gavin_files hibachi_files kopczynski_files \
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newbern_files omoikane_files schnitzi_files
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# default build
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#
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all: ${WINNERS}
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# Best use of "Precious" Lines
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#
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anonymous: anonymous.c
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${CC} anonymous.c -o anonymous
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anonymous_clean:
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${RM} -f anonymous.o
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anonymous_clobber: anonymous_clean
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${RM} -f anonymous
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# Best use of Vision
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#
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arachnid: arachnid.c
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${CC} -o arachnid -DL=LINES -DS=COLS \
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-DW=mvwaddch\(w,v,u,acs_map\[l\[m\[u arachnid.c -lncurses
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arachnid_clean:
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${RM} -f arachnid.o
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arachnid_clobber: arachnid_clean
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${RM} -f arachnid
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arachnid_files: arachnid.info
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# Best Calculated Risk
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#
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burley: burley.c
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${CC} -ansi burley.c -o burley
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burley_clean:
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${RM} -f burley.o
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burley_clobber: burley_clean
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${RM} -f burley
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# Best Use of Light and Spheres
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#
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gavare: gavare.c
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${CC} -O3 gavare.c -o gavare
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gavare_clean:
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${RM} -f gavare.o
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gavare_clobber: gavare_clean
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${RM} -f gavare
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# Best of Show
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#
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gavin: gavin.c
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${CC} ${GAVIN_OPT} -o gavin ${GAVIN_FLAGS} gavin.c
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${RM} -f kernel
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./gavin > kernel
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${CC} ${GAVIN_OPT} -c ${GAVIN_FLAGS} -DB=_start '-Dputchar(a)=' gavin.c
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${RM} -f sh
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${LD} -s -o sh gavin.o
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${RM} -f vi
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${CP} sh vi
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${RM} -f fs.tar
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${TAR} -cvf fs.tar sh vi gavin.c gavin.hint prim
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gavin_clean:
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${RM} -f sh vi kernel gavin.o
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gavin_clobber: gavin_clean
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${RM} -f gavin fs.tar
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gavin_files: boot.b lilo.conf prim gavin_install.txt
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# Best Abuse of the Guidelines
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#
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hibachi: hibachi.tar.gz
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${RM} -f hibachi.tar
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${GUNZIP} < hibachi.tar.gz > hibachi.tar
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${TAR} -xvf hibachi.tar
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${RM} -f hibachi.tar
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(cd hibachi && ${SHELL} ./configure)
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([ -f hibachi/makefile ] && cd hibachi && $(MAKE) -f makefile || true)
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hibachi_clean:
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${RM} -f hibachi/hibachi.o hibachi.tar
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hibachi_clobber: hibachi_clean
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${RM} -rf hibachi
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hibachi_files: hibachi.tar.gz
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# Most Functional Output
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#
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hoyle: hoyle.c
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${CC} hoyle.c -o hoyle -lm
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hoyle.orig: hoyle.orig.c
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${CC} hoyle.orig.c -o hoyle.orig -lm
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hoyle_clean:
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${RM} -f hoyle.o hoyle.orig.o
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hoyle_clobber: hoyle_clean
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${RM} -f hoyle hoyle.orig
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# Best Abuse of the Periodic Table
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#
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jdalbec: jdalbec.c
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@${RM} -f jdalbec2.c
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-${CC} -E jdalbec.c > jdalbec2.c
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@${RM} -f jdalbec3.c
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${SED} -e 's/ (/(/g' < jdalbec2.c > jdalbec3.c
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${CC} -ansi jdalbec3.c -o jdalbec
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jdalbec_clean:
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${RM} -f jdalbec2.c jdalbec3.c jdalbec.o
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jdalbec_clobber: jdalbec_clean
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${RM} -f jdalbec
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# Best one-liner
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#
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kopczynski: kopczynski.c
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${CC} -Dif=while kopczynski.c -o kopczynski
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kopczynski.orig: kopczynski.orig.c
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${CC} -Dif=while kopczynski.orig.c -o kopczynski.orig
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kopczynski_clean:
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${RM} -f kopczynski.o kopczynski.orig.o
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kopczynski_clobber: kopczynski_clean
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${RM} -f kopczynski kopczynski.orig
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kopczynski_files: kopczynski-10 kopczynski-11 kopczynski-8a kopczynski-8b \
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kopczynski-8c kopczynski-9
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# Best Font Engine
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#
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newbern: newbern.c
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${CC} newbern.c -o newbern
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newbern_clean:
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${RM} -f newbern.o
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newbern_clobber: newbern_clean
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${RM} -f newbern
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newbern_files: newbern.dat
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# Best Utility
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#
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omoikane: omoikane.c
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${CC} -O omoikane.c -o omoikane
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omoikane_clean:
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${RM} -f omoikane.o
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omoikane_clobber: omoikane_clean
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${RM} -f omoikane
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omoikane_files: omoikane.info
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# Best Non-Use of Curses
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#
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schnitzi: schnitzi.c
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${CC} schnitzi.c -o schnitzi
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schnitzi_clean:
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${RM} -f schnitzi.o
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schnitzi_clobber: schnitzi_clean
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${RM} -f schnitzi
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schnitzi_files: schnitzi.inp0 schnitzi.inp1
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# Best Abuse of Indentation
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#
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sds: sds.c
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${CC} -o sds sds.c
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sds_clean:
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${RM} -f sds_encoder.c sds_encoder.o sds.o
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sds_clobber: sds_clean
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${RM} -f sds sds_encoder
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||||||
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# Best X11 Game
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||||||
#
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||||||
vik1: vik1.c
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||||||
${CC} -ansi -O2 -o vik1 vik1.c -L${X11_LIBDIR} -lX11
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||||||
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||||||
vik1_clean:
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||||||
${RM} -f vik1.o
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||||||
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||||||
vik1_clobber: vik1_clean
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||||||
${RM} -f vik1
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||||||
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||||||
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||||||
# Best Abuse of CPP
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||||||
#
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||||||
vik2: vik2.c
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vik2: vik2.c
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||||||
@${RM} -f vik2_1.c
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@${RM} -f vik2_1.c
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||||||
${CC} -E '-DSTOP=_5' '-DFNAME="vik2_1.c"' vik2.c > vik2_1.c
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${CC} -E '-DSTOP=_5' '-DFNAME="vik2_1.c"' vik2.c > vik2_1.c
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||||||
@@ -333,30 +10,333 @@ vik2_clean:
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|||||||
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||||||
vik2_clobber: vik2_clean
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vik2_clobber: vik2_clean
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||||||
${RM} -f vik2
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${RM} -f vik2
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||||||
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#!/usr/bin/env make
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||||||
|
|
||||||
# utility rules
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|
||||||
#
|
#
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||||||
everything: ${WINNERS} ${ALT_NAMES} ${DATA_FILES}
|
# IOCCC 2004 winning entry - vik2
|
||||||
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|
||||||
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################################################################################
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||||||
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#
|
||||||
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# Regarding individual entries:
|
||||||
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#
|
||||||
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# IOCCC winning entry code may not work on your system. Even with standards,
|
||||||
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# conditions and build environments change, especially when it comes to more
|
||||||
|
# extreme code such you might find in an IOCCC winner. Moreover, what was
|
||||||
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# allowed and liked in one IOCCC contest may no longer be liked/allowed in
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||||||
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# later IOCCC years.
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||||||
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#
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||||||
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# Corrections on winning author and fixing typos in remarks are VERY WELCOME.
|
||||||
|
#
|
||||||
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# GitHub pull requests are welcome:
|
||||||
|
#
|
||||||
|
# If you have a patch that might make running an entry work in modern Unix-like
|
||||||
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# environments, please create a GitHub pull request for the IOCCC judges to
|
||||||
|
# consider.
|
||||||
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#
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||||||
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# Suggestions and corrections regarding Makefiles, winning author information,
|
||||||
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# 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:
|
||||||
|
#
|
||||||
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# https://github.com/ioccc-src/winner
|
||||||
|
#
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||||||
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################################################################################
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||||||
|
|
||||||
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# 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/
|
||||||
|
|
||||||
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|
||||||
|
#############################
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||||||
|
# shell used by this Makefile
|
||||||
|
#############################
|
||||||
|
#
|
||||||
|
SHELL= bash
|
||||||
|
|
||||||
|
#######################
|
||||||
|
# common tool locations
|
||||||
|
#######################
|
||||||
|
#
|
||||||
|
include ../../var.mk
|
||||||
|
|
||||||
|
# Set X11_LIBDIR to the directory where the X11 library resides
|
||||||
|
#
|
||||||
|
#X11_LIBDIR= /usr/X11R6/lib
|
||||||
|
#X11_LIBDIR= /usr/X11/lib
|
||||||
|
X11_LIBDIR= /opt/X11/lib
|
||||||
|
|
||||||
|
# Set X11_INCLUDEDIR to the directory where the X11 include files reside
|
||||||
|
#
|
||||||
|
#X11_INCDIR= /usr/X11R6/include
|
||||||
|
#X11_INCDIR= /usr/X11/include
|
||||||
|
X11_INCDIR= /opt/X11/include
|
||||||
|
|
||||||
|
# Common C compiler warnings to silence
|
||||||
|
#
|
||||||
|
CSILENCE=
|
||||||
|
#CSILENCE= -Wno-implicit-int
|
||||||
|
|
||||||
|
# Common C compiler warning flags
|
||||||
|
#
|
||||||
|
#CWARN= ${CSILENCE}
|
||||||
|
#CWARN= -Wall ${CSILENCE}
|
||||||
|
#CWARN= -Wall -Wextra ${CSILENCE}
|
||||||
|
CWARN= -Wall -Wextra -pedantic ${CSILENCE}
|
||||||
|
|
||||||
|
# Compiler standard
|
||||||
|
#
|
||||||
|
#CSTD=
|
||||||
|
#CSTD= -ansi
|
||||||
|
CSTD= -std=gnu99
|
||||||
|
|
||||||
|
# Compiler bit architecture
|
||||||
|
#
|
||||||
|
# Some entries require 32-bitness:
|
||||||
|
# ARCH= -m32
|
||||||
|
#
|
||||||
|
# Some entries require 64-bitness:
|
||||||
|
# ARCH= -m64
|
||||||
|
#
|
||||||
|
# By default we assume nothing:
|
||||||
|
#
|
||||||
|
ARCH=
|
||||||
|
|
||||||
|
# Defines that are needed to compile
|
||||||
|
#
|
||||||
|
CDEFINE=
|
||||||
|
#CDEFINE= -DIOCCC
|
||||||
|
|
||||||
|
# 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} -I ${X11_INCDIR}/X11
|
||||||
|
#CINCLUDE= `${SDL2_CONFIG} --cflags`
|
||||||
|
|
||||||
|
# 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
|
||||||
|
# under those buggy optimizers and thus you may not want anything.
|
||||||
|
# Reasonable compilers will allow for -O3.
|
||||||
|
#
|
||||||
|
#OPT=
|
||||||
|
#OPT= -O
|
||||||
|
#OPT= -O1
|
||||||
|
#OPT= -O2
|
||||||
|
OPT= -O3
|
||||||
|
|
||||||
|
# Default flags for ANSI C compilation
|
||||||
|
#
|
||||||
|
CFLAGS= ${CSTD} ${CWARN} ${ARCH} ${CDEFINE} ${CINCLUDE} ${OPT}
|
||||||
|
|
||||||
|
# Libraries needed to build
|
||||||
|
#
|
||||||
|
LIBS=
|
||||||
|
#LIBS= -lm
|
||||||
|
#LIBS= -L ${X11_LIBDIR} -lX11
|
||||||
|
#LIBS= `${SDL2_CONFIG} --libs`
|
||||||
|
|
||||||
|
# C compiler to use
|
||||||
|
#
|
||||||
|
CC= cc
|
||||||
|
#CC=clang
|
||||||
|
#CC=gcc
|
||||||
|
|
||||||
|
# Compiler add-ons or replacements for clang only
|
||||||
|
#
|
||||||
|
ifeq ($(CC),clang)
|
||||||
|
#
|
||||||
|
CSILENCE+= -Wno-poison-system-directories
|
||||||
|
#
|
||||||
|
CWARN+= -Weverything
|
||||||
|
#
|
||||||
|
endif
|
||||||
|
|
||||||
|
# Specific add-ons or replacements for gcc only
|
||||||
|
#
|
||||||
|
ifeq ($(CC),gcc)
|
||||||
|
#
|
||||||
|
#CSILENCE+=
|
||||||
|
#
|
||||||
|
#CWARN+=
|
||||||
|
#
|
||||||
|
endif
|
||||||
|
|
||||||
|
|
||||||
|
##############################
|
||||||
|
# Special flags for this entry
|
||||||
|
##############################
|
||||||
|
#
|
||||||
|
ENTRY= vik2
|
||||||
|
PROG= ${ENTRY}
|
||||||
|
#
|
||||||
|
OBJ= ${PROG}.o
|
||||||
|
DATA=
|
||||||
|
TARGET= ${PROG}
|
||||||
|
#
|
||||||
|
ALT_OBJ=
|
||||||
|
ALT_TARGET=
|
||||||
|
|
||||||
|
|
||||||
|
#################
|
||||||
|
# build the entry
|
||||||
|
#################
|
||||||
|
#
|
||||||
|
all: data ${TARGET}
|
||||||
|
@${TRUE}
|
||||||
|
|
||||||
|
.PHONY: all alt data everything clean clobber install \
|
||||||
|
love haste waste maker easter_egg sandwich \
|
||||||
|
supernova deep_magic magic charon pluto
|
||||||
|
|
||||||
|
${PROG}: ${PROG}.c
|
||||||
|
${RM} -f ${PROG}_1.c
|
||||||
|
${CC} -E '-DSTOP=_5' '-DFNAME="${PROG}_1.c"' ${PROG}.c > ${PROG}_1.c
|
||||||
|
${RM} -f ${PROG}_2.c
|
||||||
|
${CC} -E ${PROG}_1.c > ${PROG}_2.c
|
||||||
|
${CC} ${CFLAGS} ${PROG}_2.c -o ${PROG}
|
||||||
|
|
||||||
|
# alternative executable
|
||||||
|
#
|
||||||
|
alt: data ${ALT_TARGET}
|
||||||
|
@${TRUE}
|
||||||
|
|
||||||
|
# data files
|
||||||
|
#
|
||||||
|
data: ${DATA}
|
||||||
|
@${TRUE}
|
||||||
|
|
||||||
|
# both all and alt
|
||||||
|
#
|
||||||
|
everything: all alt
|
||||||
|
|
||||||
|
|
||||||
|
###############
|
||||||
|
# utility rules
|
||||||
|
###############
|
||||||
|
#
|
||||||
|
clean:
|
||||||
|
${RM} -f ${OBJ} ${ALT_OBJ}
|
||||||
|
@-if [ -f indent.c ]; then \
|
||||||
|
echo ${RM} -f indent.c; \
|
||||||
|
${RM} -f indent.c; \
|
||||||
|
fi
|
||||||
|
|
||||||
|
clobber: clean
|
||||||
|
${RM} -f ${TARGET} ${ALT_TARGET}
|
||||||
|
${RM} -f ${PROG}_1.c ${PROG}_2.c
|
||||||
|
@-if [ -e sandwich ]; then \
|
||||||
|
${RM} -f sandwich; \
|
||||||
|
echo 'ate sandwich'; \
|
||||||
|
fi
|
||||||
|
|
||||||
|
install:
|
||||||
|
@echo "Dr. Spock says that is not logical!"
|
||||||
|
@${TRUE}
|
||||||
|
|
||||||
|
# you may be able to misunderstand the source by reading indent.c
|
||||||
|
#
|
||||||
|
indent.c: ${PROG}.c
|
||||||
|
@if which "${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 $< yourself, sorry"; \
|
||||||
|
echo "exit 1"; \
|
||||||
|
exit 1; \
|
||||||
|
fi
|
||||||
|
|
||||||
|
|
||||||
|
##################
|
||||||
|
# 133t hacker rulz
|
||||||
|
##################
|
||||||
|
#
|
||||||
love:
|
love:
|
||||||
@echo 'not war?'
|
@echo 'not war?'
|
||||||
|
@${TRUE}
|
||||||
|
|
||||||
haste:
|
haste:
|
||||||
$(MAKE) waste
|
$(MAKE) waste
|
||||||
|
|
||||||
waste:
|
|
||||||
@echo 'waste'
|
|
||||||
|
|
||||||
clean: ${CLEAN}
|
|
||||||
${RM} -f a.out core
|
|
||||||
|
|
||||||
clobber: ${CLOBBER}
|
|
||||||
${RM} -f ${WINNERS}
|
|
||||||
${RM} -f ${ALT_NAMES}
|
|
||||||
|
|
||||||
nuke: clobber
|
|
||||||
@${TRUE}
|
@${TRUE}
|
||||||
|
|
||||||
install: all
|
waste:
|
||||||
${CAT} ${WINNERS} ${ALT_NAMES} > /dev/null
|
@echo 'haste'
|
||||||
|
@${TRUE}
|
||||||
|
|
||||||
|
maker:
|
||||||
|
@echo 'Participate in a maker faire'
|
||||||
|
@${TRUE}
|
||||||
|
|
||||||
|
easter_egg:
|
||||||
|
@echo "you expected to often misunderstand this $${RANDOM} magic"
|
||||||
|
@echo "chongo '<was here>' /\\oo/\\"
|
||||||
|
@echo "Eggy"
|
||||||
|
|
||||||
|
sandwich: easter_egg
|
||||||
|
@if [ `id -u` -eq 0 ]; then \
|
||||||
|
echo 'Okay.'; \
|
||||||
|
echo "$${RANDOM}`date +%s`$${RANDOM}" > $@; \
|
||||||
|
else \
|
||||||
|
echo 'What? Make it yourself.'; \
|
||||||
|
exit 1; \
|
||||||
|
fi
|
||||||
|
|
||||||
|
# Understand the history of the Homebrew Computer Club
|
||||||
|
# as well as the West Coast Computer Faire and
|
||||||
|
# you might be confused different. :-)
|
||||||
|
#
|
||||||
|
supernova: sandwich
|
||||||
|
@-if [ -r .code_anal ]; then \
|
||||||
|
${RM} -f .code_anal_v6; \
|
||||||
|
else \
|
||||||
|
echo "planet deniers, like some members of the IAU, are so cute when they try to defend their logic"; \
|
||||||
|
fi
|
||||||
|
@echo "A $@ helps ${MAKE} the elements that help form planets"
|
||||||
|
@${TRUE}
|
||||||
|
|
||||||
|
deep_magic: supernova
|
||||||
|
@-if [ -r .code_anal ]; then \
|
||||||
|
ccode_analysis --deep_magic 7889066cdbdf09b0408021754586e895be641cc9be29e7eafd3ca65359541f17 \
|
||||||
|
--FNV1a_hash_512_bit -v2 "${PROG}" "${PROG}.c"; \
|
||||||
|
else \
|
||||||
|
echo "Wrong! Do it again!"; \
|
||||||
|
sleep 2; \
|
||||||
|
echo "Wrong! Do it again!"; \
|
||||||
|
sleep 2; \
|
||||||
|
echo "Wrong! Do it again!"; \
|
||||||
|
fi
|
||||||
|
@${TRUE}
|
||||||
|
|
||||||
|
magic: deep_magic
|
||||||
|
@-if [ -r .code_anal ]; then \
|
||||||
|
ccode_analysis --level 20003 --mode 5717175 --FNV1a_hash_512_bit -v2 "${PROG}" "${PROG}.c"; \
|
||||||
|
else \
|
||||||
|
echo "If you don't eat yer meat, you can't have any pudding!"; \
|
||||||
|
echo "How can you have any pudding if you don't eat yer meat?!"; \
|
||||||
|
fi
|
||||||
|
@${TRUE}
|
||||||
|
|
||||||
|
# The IOCCC resident astronomer states
|
||||||
|
#
|
||||||
|
charon: magic
|
||||||
|
@echo "$@ is a dwarf planet"
|
||||||
|
@echo "dwarf is a type of planet"
|
||||||
|
@echo "therefore IAU, $@ is a planet"
|
||||||
|
|
||||||
|
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"
|
||||||
+125
-122
@@ -1,4 +1,4 @@
|
|||||||
Best Abuse of CPP:
|
# Best Abuse of CPP:
|
||||||
|
|
||||||
Daniel Vik
|
Daniel Vik
|
||||||
926 Genter Street
|
926 Genter Street
|
||||||
@@ -7,54 +7,59 @@ Best Abuse of CPP:
|
|||||||
|
|
||||||
http://www.vik.cc/
|
http://www.vik.cc/
|
||||||
|
|
||||||
|
# To build:
|
||||||
|
|
||||||
Judges' Comments:
|
```sh
|
||||||
|
make
|
||||||
|
```
|
||||||
|
|
||||||
To build:
|
### To run:
|
||||||
|
|
||||||
make vik2
|
```sh
|
||||||
|
./prog
|
||||||
|
```
|
||||||
|
|
||||||
To run:
|
### Try:
|
||||||
|
|
||||||
./vik2
|
```sh
|
||||||
|
echo "Do or do not. There is no try."
|
||||||
|
```
|
||||||
|
|
||||||
The fun thing about CPP abuses is that, in most cases, running the
|
## Judges' comments:
|
||||||
preprocessor on them doesn't help you decipher the obfuscated code.
|
|
||||||
That's assuming your preprocessor can take it at all.
|
|
||||||
|
|
||||||
|
The fun thing about CPP abuses is that, in most cases, running the
|
||||||
|
preprocessor on them doesn't help you decipher the obfuscated code.
|
||||||
|
That's assuming your preprocessor can take it at all.
|
||||||
|
|
||||||
Selected Author's Comments:
|
## Author's comments:
|
||||||
|
|
||||||
Introduction
|
### Introduction
|
||||||
============
|
|
||||||
|
|
||||||
It's been a while since the last pre-processor killer won the ioccc.
|
It's been a while since the last pre-processor killer won the ioccc.
|
||||||
I thought it was time to relive hour long compile times so I made a
|
I thought it was time to relive hour long compile times so I made a
|
||||||
program that does (almost) all computation in the pre-processor. The
|
program that does (almost) all computation in the pre-processor. The
|
||||||
program even causes gcc (and other pre-processors) to crash when
|
program even causes gcc (and other pre-processors) to crash when
|
||||||
configured to do maximum number of computations.
|
configured to do maximum number of computations.
|
||||||
The default configuration of the makefile is set to make the program
|
The default configuration of the makefile is set to make the program
|
||||||
compile in a not too long time.
|
compile in a not too long time.
|
||||||
|
|
||||||
I've got cpp to crash in a couple of diffenent ways. Most common is to
|
I've got cpp to crash in a couple of diffenent ways. Most common is to
|
||||||
get a segmentation fault, but a couple of times it just got stuck in
|
get a segmentation fault, but a couple of times it just got stuck in
|
||||||
some infinite loop.
|
some infinite loop.
|
||||||
|
|
||||||
I actually had to write my own pre-processor to verify that the program
|
I actually had to write my own pre-processor to verify that the program
|
||||||
was doing the right thing...
|
was doing the right thing...
|
||||||
|
|
||||||
Since it takes a very long time to compile the program, there is a
|
Since it takes a very long time to compile the program, there is a
|
||||||
symbol that can be defined to shorten the compile time and avoid
|
symbol that can be defined to shorten the compile time and avoid
|
||||||
compiler errors.
|
compiler errors.
|
||||||
|
|
||||||
|
### Features
|
||||||
|
|
||||||
Features
|
The program implements an 11-bit ALU in the pre-processor. The ALU has
|
||||||
========
|
two registers, X and Y, for calculations and one status register SR.
|
||||||
|
Each bit in the registers are represented by one symbol that are either
|
||||||
The program implements an 11-bit ALU in the pre-processor. The ALU has
|
defined or undefined.
|
||||||
two registers, X and Y, for calculations and one status register SR.
|
|
||||||
Each bit in the registers are represented by one symbol that are either
|
|
||||||
defined or undefined.
|
|
||||||
|
|
||||||
The ALU has six instructions:
|
The ALU has six instructions:
|
||||||
|
|
||||||
@@ -77,123 +82,121 @@ Selected Author's Comments:
|
|||||||
INC2 - Calculates X + 2 and stores the result in X. The CARRY bit
|
INC2 - Calculates X + 2 and stores the result in X. The CARRY bit
|
||||||
is handled as in the ADD instruction.
|
is handled as in the ADD instruction.
|
||||||
|
|
||||||
Internally the ALU implements a one bit adder with a carry in and carry
|
Internally the ALU implements a one bit adder with a carry in and carry
|
||||||
out. This adder is the core of the ALU. The ADD instruction uses the one
|
out. This adder is the core of the ALU. The ADD instruction uses the one
|
||||||
bit adder to create the 11-bit adder. The SUB instruction is implemented
|
bit adder to create the 11-bit adder. The SUB instruction is implemented
|
||||||
by adding ~Y to X and then add 1. Finally the TST instruction calculates
|
by adding ~Y to X and then add 1. Finally the TST instruction calculates
|
||||||
X-Y and checks the result and the CARRY bit in the SR register to set
|
X-Y and checks the result and the CARRY bit in the SR register to set
|
||||||
the EQ and LT bits.
|
the EQ and LT bits.
|
||||||
|
|
||||||
All calculations are made using only the #ifdef, #infdef, #else, #endif,
|
All calculations are made using only the #ifdef, #infdef, #else, #endif,
|
||||||
#define and #undef. I never assign a value to a defined symbol. The
|
#define and #undef. I never assign a value to a defined symbol. The
|
||||||
logic is done by assuming that a defined symbol is 1 and an undefined
|
logic is done by assuming that a defined symbol is 1 and an undefined
|
||||||
symbol is 0. (I guess this means that I have unlimited memory as long as
|
symbol is 0. (I guess this means that I have unlimited memory as long as
|
||||||
I only store zeroes (!)).
|
I only store zeroes (!)).
|
||||||
|
|
||||||
The application that uses the pre-processor ALU is a prime number
|
The application that uses the pre-processor ALU is a prime number
|
||||||
generator. The application uses the same pre-processor directives.
|
generator. The application uses the same pre-processor directives.
|
||||||
Needed variables are stored in memory represended by one defined or
|
Needed variables are stored in memory represended by one defined or
|
||||||
undefined symbol per bit. When doing arithmetics, the variables are
|
undefined symbol per bit. When doing arithmetics, the variables are
|
||||||
loaded into the X and Y registers by defining / undefining the X and Y
|
loaded into the X and Y registers by defining / undefining the X and Y
|
||||||
register bits. Then the calcualtion is made and the result is moved back
|
register bits. Then the calcualtion is made and the result is moved back
|
||||||
to the memory.
|
to the memory.
|
||||||
|
|
||||||
The choice of application may be a bit unfortunate since we've already
|
The choice of application may be a bit unfortunate since we've already
|
||||||
seen a winning entry calculating prime nubmers in the pre-processor.
|
seen a winning entry calculating prime nubmers in the pre-processor.
|
||||||
There is a big difference though. The 1988 applin entry uses pre-
|
There is a big difference though. The 1988 applin entry uses pre-
|
||||||
processor arithmethic (in a very nice way though). This program only
|
processor arithmethic (in a very nice way though). This program only
|
||||||
defines and undefines symbols in a well defined ;) way and doesn't do
|
defines and undefines symbols in a well defined ;) way and doesn't do
|
||||||
any pre-processor arithmetics.
|
any pre-processor arithmetics.
|
||||||
|
|
||||||
The reason why I choosed to do a prime number application is that the
|
The reason why I choosed to do a prime number application is that the
|
||||||
algorithm can be written to do a lot of calculations without a lot of
|
algorithm can be written to do a lot of calculations without a lot of
|
||||||
nesting (gnu cpp allows only 200 nested includes).
|
nesting (gnu cpp allows only 200 nested includes).
|
||||||
|
|
||||||
|
### Build and Run
|
||||||
|
|
||||||
Build and Run
|
First, do a first pre processing of the initial definitions. The FNAME
|
||||||
=============
|
symbol must be defined to the name of the output file. If you want to
|
||||||
|
speed up the compilation, define the STOP symbol to anything from _3 to
|
||||||
|
_10. (The default value is _10 which will make the compilation take some
|
||||||
|
time.) Prime numbers up to 2^STOP will be calculated.
|
||||||
|
|
||||||
First, do a first pre processing of the initial definitions. The FNAME
|
```sh
|
||||||
symbol must be defined to the name of the output file. If you want to
|
cpp '-DSTOP=_5' '-DFNAME="tmp1.c"' prog.c tmp1.c
|
||||||
speed up the compilation, define the STOP symbol to anything from _3 to
|
```
|
||||||
_10. (The default value is _10 which will make the compilation take some
|
|
||||||
time.) Prime numbers up to 2^STOP will be calculated.
|
|
||||||
|
|
||||||
$ cpp '-DSTOP=_5' '-DFNAME="tmp1.c"' prog.c tmp1.c
|
Then use cpp or any other pre-processor to do the actual work. This will
|
||||||
|
take some time....
|
||||||
|
|
||||||
Then use cpp or any other pre-processor to do the actual work. This will
|
```sh
|
||||||
take some time....
|
cpp tmp1.c > tmp2.c
|
||||||
|
```
|
||||||
|
|
||||||
$ cpp tmp1.c > tmp2.c
|
Finally compile the pre processed file
|
||||||
|
|
||||||
Finally compile the pre processed file
|
```sh
|
||||||
|
cc -O tmp2.c -o prog
|
||||||
|
```
|
||||||
|
|
||||||
$ cc -O tmp2.c -o prog
|
Then run the program to reveil all prime numbers up to 32 (if you used
|
||||||
|
STOP=_5 as above):
|
||||||
|
|
||||||
Then run the program to reveil all prime numbers up to 32 (if you used
|
```sh
|
||||||
STOP=_5 as above):
|
./prog
|
||||||
|
```
|
||||||
|
|
||||||
$ ./prog
|
### Verification
|
||||||
|
|
||||||
|
I wasn't able to compile the full program which calculates prime numbers
|
||||||
|
up to 1024 using gnu cpp (or any other pre-processor) so I had to write
|
||||||
|
my own. Knowing how the program works it was quite easy to reduce the
|
||||||
|
compilation time from several hours to about one second. I also added
|
||||||
|
some statistics to my home made pre-processor and I found that
|
||||||
|
calculating prime numbers up to 1024 makes the program include itself
|
||||||
|
over 6.8 million times (see the statistics table below).
|
||||||
|
|
||||||
Verification
|
### Obfuscation
|
||||||
============
|
|
||||||
|
|
||||||
I wasn't able to compile the full program which calculates prime numbers
|
Well, since 98.5% of the program is preprocessor directives, the main
|
||||||
up to 1024 using gnu cpp (or any other pre-processor) so I had to write
|
obfuscation is the use of preprocessor directives.
|
||||||
my own. Knowing how the program works it was quite easy to reduce the
|
|
||||||
compilation time from several hours to about one second. I also added
|
|
||||||
some statistics to my home made pre-processor and I found that
|
|
||||||
calculating prime numbers up to 1024 makes the program include itself
|
|
||||||
over 6.8 million times (see the statistics table below).
|
|
||||||
|
|
||||||
|
Doing arithmetics without acutally using any arithmetic operations makes
|
||||||
|
the program quite hard to follow.
|
||||||
|
|
||||||
Obfuscation
|
In order to actually do the calculations, the program includes itself a
|
||||||
===========
|
lot.
|
||||||
|
|
||||||
Well, since 98.5% of the program is preprocessor directives, the main
|
The symbol names are made as short as possible to meet the space limits.
|
||||||
obfuscation is the use of preprocessor directives.
|
This of course adds to the obfuscation (even though the program is
|
||||||
|
quite obfuscated with longer, readable macro names.
|
||||||
|
|
||||||
Doing arithmetics without acutally using any arithmetic operations makes
|
Finally, I made the 1.5% c code a bit harder to read by breaking all
|
||||||
the program quite hard to follow.
|
lines after three characters.
|
||||||
|
|
||||||
In order to actually do the calculations, the program includes itself a
|
The program has 1029 lines which makes it the longest entry (so far).
|
||||||
lot.
|
|
||||||
|
|
||||||
The symbol names are made as short as possible to meet the space limits.
|
Even though the pre-processed and indented output is easier to read, it
|
||||||
This of course adds to the obfuscation (even though the program is
|
is quite hard to find the code in it. The size of the pre-processed file
|
||||||
quite obfuscated with longer, readable macro names.
|
is several Mb when using gnu cpp.
|
||||||
|
|
||||||
Finally, I made the 1.5% c code a bit harder to read by breaking all
|
### Limitations
|
||||||
lines after three characters.
|
|
||||||
|
|
||||||
The program has 1029 lines which makes it the longest entry (so far).
|
In order to fit the program within the space limits, I had to define the
|
||||||
|
#define, #endif, and some other directives as single character symbols.
|
||||||
|
This does not compile on all pre-processors but using gnu cpp as a first
|
||||||
|
compilation step solves this.
|
||||||
|
|
||||||
Even though the pre-processed and indented output is easier to read, it
|
### Statistics
|
||||||
is quite hard to find the code in it. The size of the pre-processed file
|
|
||||||
is several Mb when using gnu cpp.
|
|
||||||
|
|
||||||
|
The table below contains some interesting statistics about the
|
||||||
Limitations
|
compilation of the program. The intermediate file size is the size of
|
||||||
===========
|
the output file of the cpp pre-processor. The time taken to pre process
|
||||||
|
the program were measured using gnu cpp on my 2.0MHz P4 with 512Mb ram
|
||||||
In order to fit the program within the space limits, I had to define the
|
and a lot of disk.
|
||||||
#define, #endif, and some other directives as single character symbols.
|
|
||||||
This does not compile on all pre-processors but using gnu cpp as a first
|
|
||||||
compilation step solves this.
|
|
||||||
|
|
||||||
|
|
||||||
Statistics
|
|
||||||
==========
|
|
||||||
|
|
||||||
The table below contains some interesting statistics about the
|
|
||||||
compilation of the program. The intermediate file size is the size of
|
|
||||||
the output file of the cpp pre-processor. The time taken to pre process
|
|
||||||
the program were measured using gnu cpp on my 2.0MHz P4 with 512Mb ram
|
|
||||||
and a lot of disk.
|
|
||||||
|
|
||||||
Generated Recursive Max nest Intermediate
|
Generated Recursive Max nest Intermediate
|
||||||
Level prime nrs includes count file size Time
|
Level prime nrs includes count file size Time
|
||||||
|
|
||||||
_3 < 8 2 322 9 74 748 4"
|
_3 < 8 2 322 9 74 748 4"
|
||||||
_4 < 16 4 672 9 182 652 9"
|
_4 < 16 4 672 9 182 652 9"
|
||||||
|
|||||||
Reference in new issue
Block a user