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# Copyright (c) 1997-2024
# Ewgenij Gawrilow, Michael Joswig, and the polymake team
# Technische Universität Berlin, Germany
# https://polymake.org
#
# This program 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 2, or (at your option) any
# later version: http://www.gnu.org/licenses/gpl.txt.
#
# This program 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.
#-------------------------------------------------------------------------------
use strict;
use namespaces;
use warnings qw(FATAL void syntax misc);
use feature 'state';
package Polymake::Core::Datafile;
use Polymake::Struct (
[ new => '$%' ],
[ '$filename' => 'Cwd::abs_path(#1)' ],
'$is_compressed',
[ '$canonical' => '#%', default => 'undef' ],
);
sub new {
my $self = &_new;
enforce_canonical($self);
$self
}
sub load {
my $self = &_new;
open my $fh, "<".layer_for_compression($self), $self->filename
or die "can't open file ".$self->filename.": $!\n";
my $data;
my %flags = (changed => false, filename => $self->filename);
local $_;
while (<$fh>) {
if (/^\s*\{/) {
{ local $/; $_ .= <$fh>; }
local $PropertyType::trusted_value = 1;
my $decoded = decode_json($_);
$data = Serializer::deserialize($decoded, \%flags);
$self->canonical = $decoded->{_canonical};
last;
}
if (/^\s*<\?xml/) {
seek($fh, 0, 0);
require Polymake::Core::XMLtoJSON;
local $PropertyType::trusted_value = 0;
$data = Serializer::deserialize(XMLtoJSON::from_filehandle($fh), \%flags);
last;
}
if (/\S/) {
require Polymake::Core::PlainFile;
my $plf = new PlainFile($self->filename);
if ($Verbose::files) {
dbg_print( "upgrading ", $self->filename, " from old plain file format" );
}
return $plf->load($fh, $self);
}
}
if (!$self->canonical && enforce_canonical($self)) {
$flags{changed} = true;
}
if (instanceof BigObject($data)) {
$data->persistent = $self;
if ($flags{changed}) {
$data->set_changed;
}
} elsif ($flags{changed}) {
save($self, $data);
}
$data
}
#############################################################################################
sub from_string {
local ($_) = @_;
if (/\A\s*\{/s) {
return Serializer::deserialize(decode_json($_));
}
if (/\A\s*<\?xml/s) {
require Polymake::Core::XMLtoJSON;
return Serializer::deserialize(XMLtoJSON::from_string($_));
}
die "unrecognized input string: JSON or XML expected\n";
}
#############################################################################################
sub layer_for_compression {
my ($self) = @_;
if ($self->filename =~ /\.gz$/) {
require PerlIO::via::gzip;
$self->is_compressed = true;
":via(gzip)";
} else {
""
}
}
#############################################################################################
sub enforce_canonical {
my ($self) = @_;
$self->canonical //= $self->filename =~ m{/(?: testsuite | testscenarios) (?: /[^/]+ ){1,2} /[^/]* $}x;
}
#############################################################################################
sub save {
my ($self, $data, %options) = @_;
$options{save} = true;
$options{pretty} = $self->canonical;
$options{name_proposal} = sub {
my ($obj) = @_;
my ($name) = $self->filename =~ $filename_re;
if (length(my $suffix = $obj->default_file_suffix)) {
$name =~ s/\.$suffix$//;
}
$name
};
my $serialized = Serializer::serialize($data, \%options);
my $compress = layer_for_compression($self);
my $encoder = JSON->new->utf8;
if ($self->canonical) {
$encoder->canonical->indent->space_after;
$serialized->{_canonical} = true;
}
my ($of, $of_k) = new OverwriteFile($self->filename, $compress);
$encoder->write($serialized, $of);
close $of;
}
#############################################################################################
1
# Local Variables:
# cperl-indent-level:3
# indent-tabs-mode:nil
# End:
|
