#!/usr/bin/perl
# -*- perl -*-
#
# Print documents with long lines.
# Copyright (c) 1996-1999 Markku Rossi
#
# Author: Markku Rossi <mtr@iki.fi>
#

#
# This file is part of GNU Enscript.
#
# Enscript is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Enscript is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Enscript.  If not, see <http://www.gnu.org/licenses/>.
#

$enscript = "enscript";
$ENV{LC_ALL} = "C"; # we parse enscript's output

$program = $0;
$program =~ s/.*\///g;

sub usage {
    warn "Usage: $program [-oFILE] [ENSCRIPT_OPTION]... [FILE]...\n";
}

# Handle arguments.
$args = "--extended-return-values";
$files = "";
while ($arg = shift(@ARGV)) {
    if ($arg eq "--help") {
	&usage;
	exit 0;
    } elsif ($arg eq "--version") {
	warn "sliceprint 1.0\n";
	exit 0;
    } elsif ($arg =~ /^-p(.+)$/
	|| $arg =~ /^-o(.+)$/
	|| $arg =~ /^--output=(.+)$/) {
	$output_file = $1;
    } elsif ($arg eq "-p" || $arg eq "-o") {
	$output_file = shift(@ARGV);
    } elsif ($arg =~ /^-/) {
	$args .= " $arg";
    } else {
	$files .= " $arg";
    }
}

# Check if output file is "-".
if (defined($output_file) && $output_file eq "-") {
    die "$program: output file can't be stdout\n";
}

$slice = 0;
while (1) {
    $slice++;
    if (defined($output_file)) {
	$cmd = "$enscript " . $args . " --slice=$slice -p"
	    . $output_file . "." . $slice . " " . $files;
    } else {
	$cmd = "$enscript " . $args . " --slice=$slice" . $files;
    }
    print "printing slice $slice...\n";
    $result = `$cmd 2>&1`;
    print $result;
    if ($result !~ ".*line.* were wrapped.*") {
	last;
    }
}
