#! /usr/bin/env perl
eval 'exec perl -S $0 ${1+"$@"}'
    if $running_under_some_shell;

# This script updates the simgrid XML file passed as argument (modification in place)
# It is built to do the conversion incrementally.

# Copyright (c) 2006-2014. The SimGrid Team.
# All rights reserved.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the license (GNU LGPL) which comes with this package.

=encoding UTF-8

=head1 NAME

simgrid_update_xml - updates simgrid XML files to latest version
  
=head1 SYNOPSIS

B<simgrid_update_xml> I<xml_file>
  
=head1 DESCRIPTION

simgrid_update_xml updates the simgrid XML file passed as argument.  The file
is modified in place, without any kind of backup. You may want to save a copy
before running the script.

In SimGrid XML files, the standard version is indicated in the version
attribute of the platform tag. Current version is 3. Here is a list of major
changes in each version.

=over 4

=item B<Version 0:> Used before SimGrid 3.3

=item B<Version 1:> Introduced in SimGrid 3.3

=over 4

=item 

The version attribute of platform were added to allow file versionning.

=item

The link bandwidth changed from Mb/s to b/s; and the CPU power were changed
from MFlop/s to Flop/s

=back

=item B<Version 2:> Introduced in SimGrid 3.4

=over 

=item 

Several tags were renamed: 

  CPU -> HOST 
  NETWORK_LINK -> LINK
  ROUTE_ELEMENT ->  LINK_CTN
  PLATFORM_DESCRIPTION -> PLATFORM

=back

=item B<Version 3:> Introduced in SimGrid 3.5 (this is the current version)

=over 4

=item

The AS tag were introduced. Every plaform should now contain an englobing AS
tag.

=item 

Routes are now symmetric by default.

=item

Several tags were renamed (for sake of XML sanity):

  LINK:CTN -> LINK_CTN
  TRACE:CONNECT -> TRACE_CONNECT

=back

=back

=head1 AUTHORS

 The SimGrid team (simgrid-devel@lists.gforge.inria.fr)
  
=head1 COPYRIGHT AND LICENSE

Copyright (c) 2006-2014. The SimGrid Team. All rights reserved.
  
This program is free software; you may redistribute it and/or modify it
under the terms of GNU LGPL (v2.1) license.
  
=cut


use strict;

my $fromversion=-1;
my $toversion=3;

my($output_string);

$ARGV[0] or die "simgrid_update_xml.pl <platform.xml>\n";
open INPUT, "$ARGV[0]" or die "Cannot open input file $ARGV[0]: $!\n";

$output_string = "<?xml version='1.0'?>\n".
    "<!DOCTYPE platform SYSTEM \"http://simgrid.gforge.inria.fr/simgrid.dtd\">\n".
    "<platform version=\"$toversion\">\n";


my($AS_opened)=0;

my $line;
while (defined($line = <INPUT>)) {
    chomp $line;
    # eat the header, whatever form it has
    next if ($line =~ s/<\?xml[^>]*>//           && ! $line =~ /\S/); # just in case several tags are on the same line
    next if ($line =~ s/<!DOCTYPE[^>]*>//        && ! $line =~ /\S/);
    
    if ($line =~ s/<platform(_description)? *>//) {
	$fromversion = 0;
	print "version 0\n";
	next if !$line =~ /\S/;
    } elsif ($line =~ s/<platform.*version=["]*([0-9.])["]*>//) {
	$fromversion = $1;
	print "version $fromversion\n";
	if ($fromversion == $toversion) {
	    die "Input platform file version is already $fromversion. This should be a no-op.\n";
	}
	if ($fromversion > $toversion) {
	    die "Input platform file version is more recent than this script (file version: $fromversion; script version: $toversion)\n";
	}
	next if !$line =~ /\S/;
    }
    
    if ($fromversion == 0) {
	while ($line =~ m|^(.*?)<cpu(.*?)power="([^"]*)"(.*)$|) {
	    $line = "$1TOTOTUTUTATA${2}TOTOTUTUTATA".($3*1000000)."TOTOTUTUTATA${4}";
	}
	while ($line =~ /^(.*?)TOTOTUTUTATA(.*?)TOTOTUTUTATA(.*?)TOTOTUTUTATA(.*)$/) {
	    $line = "$1<cpu${2}power=\"$3\"$4";
	}
	while ($line =~ m|^(.*?)<network_link(.*?)bandwidth="([^"]*)"(.*?)$|) {
	    $line = "$1TOTOTUTUTATA${2}TOTOTUTUTATA".($3*1000000)."TOTOTUTUTATA${4}";
	}
	while ($line =~ /^(.*?)TOTOTUTUTATA(.*?)TOTOTUTUTATA(.*?)TOTOTUTUTATA(.*?)$/) {
	    $line = "$1<network_link${2}bandwidth=\"$3\"$4";
	}
    }

    if ($fromversion < 2)  {
	# The renamings (\b=zero-width word boundary check)
	$line =~ s/\bplatform_description\b/platform/g;
	$line =~ s/\bname\b/id/g;
	$line =~ s/\bcpu\b/host/g;
	$line =~ s/\bnetwork_link\b/link/g;
	$line =~ s/\broute_element\b/link:ctn/g;
    }
    
    if ($fromversion < 3)  {
	$line =~ s/\blink:ctn\b/link_ctn/g;
	$line =~ s/\btrace:connect\b/trace_connect/g;

	if($AS_opened && (($line=~ /<\/platform>/) || ($line=~ /<process/))) {
	    $output_string .= "</AS>\n";
	    $AS_opened = 0;
	}

	if( (!$AS_opened) && (
		($line =~ /<host/)    ||
		($line =~ /<link/)    ||
		($line =~ /<cluster/) ||
		($line =~ /<router/)
	    )) {
	    $output_string .=  " <AS  id=\"AS0\"  routing=\"Full\">\n";
	    $AS_opened=1;
	}
    }
	
	if($line=~/<route /){$line =~ s/\<route/\<route symmetrical=\"NO\"/g;}
    $output_string .= "$line\n";
}

close INPUT;

if ($fromversion == -1) {
    die "Cannot retrieve the platform version\n";
}

open OUTPUT, "> $ARGV[0]";
print OUTPUT $output_string;
close OUTPUT;