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#!/usr/bin/perl
## --------------------------------------------------------------------------
##
## Copyright 1996-2009 the NASM Authors - All rights reserved.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following
## conditions are met:
##
## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above
## copyright notice, this list of conditions and the following
## disclaimer in the documentation and/or other materials provided
## with the distribution.
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
## CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
## INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
## MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
## DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
## CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
## NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
## LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
## HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
## CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
## OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
## EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
##
## --------------------------------------------------------------------------
#
# Perfect Minimal Hash Generator written in Perl, which produces
# C output.
#
require 'phash.ph';
#
# Read input file
#
sub read_input() {
my $key,$val;
my %out;
my $x = 0;
while (defined($l = <STDIN>)) {
chomp $l;
$l =~ s/\s*(\#.*|)$//;
next if ($l eq '');
if ($l =~ /^([^=]+)\=([^=]+)$/) {
$out{$1} = $2;
$x = $2;
} else {
$out{$l} = $x;
}
$x++;
}
return %out;
}
#
# Main program
#
sub main() {
my $n;
my %data;
my @hashinfo;
my $x, $i;
%data = read_input();
@hashinfo = gen_perfect_hash(\%data);
if (!@hashinfo) {
die "$0: no hash found\n";
}
verify_hash_table(\%data, \@hashinfo);
($n, $sv, $f1, $f2, $g) = @hashinfo;
print "static int HASHNAME_fg1[$n] =\n";
print "{\n";
for ($i = 0; $i < $n; $i++) {
print "\t", ${$g}[${$f1}[$i]], "\n";
}
print "};\n\n";
print "static int HASHNAME_fg2[$n] =\n";
print "{\n";
for ($i = 0; $i < $n; $i++) {
print "\t", ${$g}[${$f2}[$i]], "\n";
}
print "};\n\n";
print "struct p_hash HASHNAME =\n";
print "{\n";
print "\t$n\n";
print "\t$sv\n";
print "\tHASHNAME_fg1,\n";
print "\tHASHNAME_fg2,\n";
print "};\n";
}
main();
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