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#!/usr/bin/perl -w
# Author: Ulf Hermjakob
# Release date: October 13, 2019
# Usage: string-distance.pl {-lc1 <language-code>} {-lc2 <language-code>} < STDIN > STDOUT
# Example: string-distance.pl -lc1 rus -lc2 ukr < STDIN > STDOUT
# Example: string-distance.pl < ../test/string-similarity-test-input.txt
# Input format: two strings per line (tab-separated, in Latin script)
# Strings in non-Latin scripts should first be romanized. (Recommended script: uroman.pl)
# Output format: repetition of the two input strings, plus the string distance between them (tab-separated).
# Additional output meta info lines at the top are marked with an initial #.
#
# The script uses data from a string-distance-cost-rules file that lists costs,
# where the default cost is "1" with lower costs for differences in vowels,
# duplicate consonants, "f" vs. "ph" etc.
# Language cost rules can be language-specific and context-sensitive.
$|=1;
use FindBin;
use Cwd "abs_path";
use File::Basename qw(dirname);
use File::Spec;
my $bin_dir = abs_path(dirname($0));
my $root_dir = File::Spec->catfile($bin_dir, File::Spec->updir());
my $data_dir = File::Spec->catfile($root_dir, "data");
my $lib_dir = File::Spec->catfile($root_dir, "lib");
use lib "$FindBin::Bin/../lib";
use List::Util qw(min max);
use NLP::utilities;
use NLP::stringDistance;
$util = NLP::utilities;
$sd = NLP::stringDistance;
$verbose = 0;
$separator = "\t";
$cost_rule_filename = File::Spec->catfile($data_dir, "string-distance-cost-rules.txt");
$lang_code1 = "eng";
$lang_code2 = "eng";
%ht = ();
while (@ARGV) {
$arg = shift @ARGV;
if ($arg =~ /^-+lc1$/) {
$lang_code_candidate = shift @ARGV;
$lang_code1 = $lang_code_candidate if $lang_code_candidate =~ /^[a-z]{3,3}$/;
} elsif ($arg =~ /^-+lc2$/) {
$lang_code_candidate = shift @ARGV;
$lang_code2 = $lang_code_candidate if $lang_code_candidate =~ /^[a-z]{3,3}$/;
} elsif ($arg =~ /^-+(v|verbose)$/) {
$verbose = shift @ARGV;
} else {
print STDERR "Ignoring unrecognized arg $arg\n";
}
}
$sd->load_string_distance_data($cost_rule_filename, *ht, $verbose);
print STDERR "Loaded resources.\n" if $verbose;
my $chart_id = 0;
my $line_number = 0;
print "# Lang-code-1: $lang_code1 Lang-code-2: $lang_code2\n";
while (<>) {
$line_number++;
if ($verbose) {
if ($line_number =~ /000$/) {
if ($line_number =~ /0000$/) {
print STDERR $line_number;
} else {
print STDERR ".";
}
}
}
my $line = $_;
$line =~ s/^\xEF\xBB\xBF//;
next if $line =~ /^\s*(\#.*)?$/;
my $s1;
my $s2;
if (($s1, $s2) = ($line =~ /^("(?:\\"|[^"])*"|\S+)$separator("(?:\\"|[^"])*"|\S+)\s*$/)) {
$s1 = $util->dequote_string($s1);
$s2 = $util->dequote_string($s2);
} elsif ($line =~ /^\s*(#.*)$/) {
} else {
print STDERR "Could not process line $line_number: $line" if $verbose;
print "\n";
next;
}
$cost = $sd->quick_romanized_string_distance_by_chart($s1, $s2, *ht, "", $lang_code1, $lang_code2);
print "$s1\t$s2\t$cost\n";
}
print STDERR "\n" if $verbose;
exit 0;
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