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Software similarity tester SIM

BSD-3-Clause license

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Name		Name	Last commit message	Last commit date
Latest commit History 6 Commits
8086lang.l		8086lang.l
Answers		Answers
ChangeLog		ChangeLog
ForEachFile.c		ForEachFile.c
ForEachFile.h		ForEachFile.h
ForEachFile.o		ForEachFile.o
Korean1.txt		Korean1.txt
Korean2.txt		Korean2.txt
LICENSE.txt		LICENSE.txt
Makefile		Makefile
Malloc.c		Malloc.c
Malloc.h		Malloc.h
Malloc.o		Malloc.o
README		README
Similarity_Percentage_Computation.tex		Similarity_Percentage_Computation.tex
TechnReport		TechnReport
ToDo		ToDo
VERSION		VERSION
add_run.c		add_run.c
add_run.h		add_run.h
add_run.o		add_run.o
aiso.bdy		aiso.bdy
aiso.spc		aiso.spc
algollike.c		algollike.c
algollike.h		algollike.h
any_int.c		any_int.c
any_int.h		any_int.h
any_int.o		any_int.o
c++lang.l		c++lang.l
clang.l		clang.l
compare.c		compare.c
compare.h		compare.h
compare.o		compare.o
debug.c		debug.c
debug.h		debug.h
debug.o		debug.o
debug.par		debug.par
error.c		error.c
error.h		error.h
fname.c		fname.c
fname.h		fname.h
fname.o		fname.o
hash.c		hash.c
hash.h		hash.h
hash.o		hash.o
hash_db.i		hash_db.i
idf.c		idf.c
idf.h		idf.h
idf.o		idf.o
improve_chunk		improve_chunk
javalang.l		javalang.l
lang.c		lang.c
lang.h		lang.h
language.c		language.c
language.h		language.h
lex.c		lex.c
lex.h		lex.h
lex.o		lex.o
lisplang.l		lisplang.l
m2lang.l		m2lang.l
miralang.l		miralang.l
newargs.c		newargs.c
newargs.h		newargs.h
newargs.o		newargs.o
option-i.inp		option-i.inp
options.c		options.c
options.h		options.h
options.o		options.o
pascallang.l		pascallang.l
pasclang.l		pasclang.l
pass1.c		pass1.c
pass1.h		pass1.h
pass1.o		pass1.o
pass1_db.i		pass1_db.i
pass2.c		pass2.c
pass2.h		pass2.h
pass2.o		pass2.o
pass2_db.i		pass2_db.i
pass3.c		pass3.c
pass3.h		pass3.h
pass3.o		pass3.o
pass3_db.i		pass3_db.i
percentages.c		percentages.c
percentages.h		percentages.h
percentages.o		percentages.o
percentages_db.i		percentages_db.i
prollang.l		prollang.l
properties.c		properties.c
properties.h		properties.h
properties.o		properties.o
runs.c		runs.c
runs.h		runs.h
runs.o		runs.o
settings.par		settings.par
sim.1		sim.1
sim.c		sim.c
sim.h		sim.h
sim.o		sim.o
sim.pdf		sim.pdf
sim_8086		sim_8086

Repository files navigation

#	This file is part of the software similarity tester SIM.
#	Written by Dick Grune, Vrije Universiteit, Amsterdam.
#	$Id: README,v 2.23 2017-12-15 17:15:21 dick Exp $

These programs test for similar or equal stretches in one or more program
or text files and can be used to detect common code or plagiarism. See sim.pdf.
Checkers are available for
    C, C++, Java, Pascal, Modula-2, Lisp, Miranda, 8086 assembler, and
    natural language text.

Dec 2017:
    - speed-up
    - 8086 assembler testing added
    - full UTF-8 in input and full UTF-16 in file names

March 2017:
    - Version 3
    - C++ testing added

May 2016:
    - symmetric percentage computation

Jan 2014:
    - 64-bit compatible
    - works also on 32-bit machines with or without software 64-bit emulator

==== To install on any system with gcc, flex, cp, ln, echo, rm, and wc,
or their equivalents, for example UNIX/Linux or MSDOS+MinGW:

Unpack the most recent archive sim_3_*.zip

To compile and test, edit the Makefile to fit the local situation, and call:

    make test

This will generate one executable called sim_c, the checker for C, and will
run two small tests to show sample output.

To install, examine the Makefile, edit BINDIR and MAN1DIR to sensible paths,
and call

    make install

To change defaults, adjust the file settings.par and recompile.

==== To install on MSDOS, if you don't have a C compiler, the archive
sim_exe_3_*.zip contains:

    SIM_C.EXE          similarity tester for C
    SIM_TEXT.EXE       similarity tester for text
    SIM_C++.EXE        similarity tester for C++
    SIM_JAVA.EXE       similarity tester for Java
    SIM_PASC.EXE       similarity tester for Pascal
    SIM_M2.EXE         similarity tester for Modula-2
    SIM_LISP.EXE       similarity tester for Lisp
    SIM_MIRA.EXE       similarity tester for Miranda
    SIM_8086.EXE       similarity tester for 8086 assembler

==== To extend:

To add another language L, write a file Llang.l along the lines of clang.l
or the other *lang.l files, extend the Makefile and recompile.
All knowledge about a given language L is located in Llang.l; the rest of
the program expects each token to be a 16-bit character.


                Dick Grune
                email:	dick@dickgrune.com
                web:	http://www.dickgrune.com