#!/usr/bin/env bash
#
# $Id$
# Author: Tjark Weber
# Copyright 2004
#
# DESCRIPTION: convert DIMACS CNF files into Isabelle/HOL theories
## diagnostics
PRG="$(basename "$0")"
function usage()
{
echo
echo "Usage: $PRG FILES"
echo
echo " Convert files in DIMACS CNF format [1] into Isabelle/HOL theories."
echo
echo " For each CNF file, a theory file (with '.thy' appended to the original"
echo " filename) is generated. The CNF files are not modified."
echo
echo " This script is not too strict about the format of the input file. However,"
echo " in rare cases it may produce a theory that will not be accepted by"
echo " Isabelle/HOL (e.g. when a CNF file contains '\\end{verbatim}' or '*}' in a"
echo " comment)."
echo
echo " Each CNF file must contain at least one clause, and may not contain empty"
echo " clauses (i.e. '0' immediately followed by another '0')."
echo
echo " The CNF formula is negated, so that an unsatisfiable formula becomes"
echo " provable."
echo
echo " [1] ftp://dimacs.rutgers.edu/pub/challenge/satisfiability/doc/satformat.dvi"
echo
exit 1
}
## process command line
[ "$#" -eq 0 -o "$1" = "-?" ] && usage
## main
#set by configure
AUTO_PERL=perl
"$AUTO_PERL" -w "$ISABELLE_HOME/lib/scripts/dimacs2hol.pl" "$@"