:
eval 'exec perl -wS $0 ${1+"$@"}'
    if 0;
#**************************************************************
#
#  Licensed to the Apache Software Foundation (ASF) under one
#  or more contributor license agreements.  See the NOTICE file
#  distributed with this work for additional information
#  regarding copyright ownership.  The ASF licenses this file
#  to you under the Apache License, Version 2.0 (the
#  "License"); you may not use this file except in compliance
#  with the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing,
#  software distributed under the License is distributed on an
#  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
#  KIND, either express or implied.  See the License for the
#  specific language governing permissions and limitations
#  under the License.
#
#**************************************************************


my $target_format = "";
my @filelist;
#my $debug=1;
my $debug=0;

parameter_parse(@ARGV);
print "@filelist\n" if ( $debug );
foreach my $onefile ( @filelist ) {
    convert_file( $onefile );
}


sub convert_file
{
    my $filename = shift;
    if ( $target_format eq "dos" ) {
        $lineend = "\r\n";
    } else {
        $lineend = "\n";
    }
    open INFILE, "$filename"or die "ERROR: Couldn\'t open $filename for reading.\n";
    my @lines = <INFILE>;
    close INFILE;

    foreach my $oneline ( @lines ) {
        $oneline =~ s/\r*\n*$/$lineend/;
    }

    open OUTFILE, ">$filename" or die "ERROR: Couldn\'t open $filename for writing.\n";
    syswrite OUTFILE, join "", @lines;
    close OUTFILE;

}

sub parameter_parse
{
    if ( $target_format eq "" ) {
        $target_format = shift ;
        usage() if ( $target_format ne "unix" && $target_format ne "dos" );
        usage() if ( $#_ == -1 );
    }
    foreach my $param ( @_ ) {
        if ( $param =~ "^@" ) {
            my $filename = $param;
            $filename =~ s/^@//;
            open CMDFILE, "$filename" or die "ERROR: Couldn\'t open $filename for reading.\n";
            my @filelist = <CMDFILE>;
            close CMDFILE;
            parameter_parse( @filelist );
        } else {
            push @filelist, $param;
        }
    }
}

sub usage
{
    print "Convert text files to the desired lineend convention:\n";
    print "$0 <unix|dos> <FILE|\@filelist> [more files/lists]\n";
    exit 1;
}