#!/usr/local/bin/perl -Tw
#
#  $Id: findstrings,v 1.3 2001/09/10 20:44:47 dgregor Exp $
#
# Copyright (c) 1998 Daniel J. Gregor, Jr., All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. 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.
# 3. All advertising materials mentioning features or use of this software
#    must display the following acknowledgement:
# 	This product includes software developed by Daniel J. Gregor, Jr.
# 4. The name of Daniel J. Gregor, Jr. may not be used to endorse or promote
#    products derived from this software without specific prior written
#    permission.
# 
# THIS SOFTWARE IS PROVIDED BY DANIEL J. GREGOR, JR. ``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 DANIEL J. GREGOR, JR. 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.
#

# This script will read STDIN, and print out any line that matches one
# of the arguments on the command line.
#
# So, if you ran the following command: findstrings a b c d "g h"
# and gave it the following input on STDIN:
#	a
#	b
#	c
#	d
#	e
#	f
#	g
#	h
#	g h
#	ab
# It would print:
#	a
#	b
#	c
#	d
#	g h

use Getopt::Std;

$opt_v = 0;

getopt('ef');

if (defined($opt_f)) {
	open(STRINGS, "<" . $opt_f) ||
		die "could not open input keys file: \"$opt_f\"\n";

	while(defined($_ = <STRINGS>)) {
		chomp($_);
		$findstrings{$_} = "";
	}

	close(STRINGS);
} else {
	# Read the command-line arguments into a hash.
	while(defined($_ = shift(@ARGV))) {
		$findstrings{$_} = "";
	}
}

# Go through STDIN, remove newlines (with chomp), and print any lines that
# are in the %findstrings hash.
while (defined($_ = <STDIN>)) {
	chomp;

	if (defined($opt_e)) {
		m/$opt_e/ || next;
		$search = $1;
	} else {
		$search = $_;
	}
	
	if ($opt_v) {
		print $_, "\n" unless (exists($findstrings{$search}));
	} else {
		print $_, "\n" if (exists($findstrings{$search}));
	}
}