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# $OpenBSD: LaLoFile.pm,v 1.4 2014/03/19 02:16:22 afresh1 Exp $
# Copyright (c) 2007-2010 Steven Mestdagh <steven@openbsd.org>
# Copyright (c) 2012 Marc Espie <espie@openbsd.org>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
use strict;
use warnings;
use feature qw(say switch state);
package LT::LaLoFile;
use LT::Trace;
my %file_cache; # which files have been parsed
my $cache_by_fullname = {};
my $cache_by_inode = {};
# allows special treatment for some keywords
sub set
{
my ($self, $k, $v) = @_;
$self->{$k} = $v;
}
sub stringize
{
my ($self, $k) = @_;
if (defined $self->{$k}) {
return $self->{$k};
}
return '';
}
sub read
{
my ($class, $filename) = @_;
my $info = $class->new;
open(my $fh, '<', $filename) or die "Cannot read $filename: $!\n";
while (my $line = <$fh>) {
chomp($line);
next if $line =~ /^\#/;
next if $line =~ /^\s*$/;
if ($line =~ m/^(\S+)\=\'(.*)\'$/) {
$info->set($1, $2);
} elsif ($line =~ m/^(\S+)\=(\S+)$/) {
$info->set($1, $2);
}
}
return $info;
}
sub parse
{
my ($class, $filename) = @_;
tprint {"parsing $filename"};
if (defined $cache_by_fullname->{$filename}) {
tsay {" (cached)"};
return $cache_by_fullname->{$filename};
}
my $key = join("/", (stat $filename)[0,1]);
if (defined $cache_by_inode->{$key}) {
tsay {" (cached)"};
return $cache_by_inode->{$key};
}
tsay {""};
return $cache_by_inode->{$key} = $cache_by_fullname->{$filename} =
$class->read($filename);
}
sub new
{
my $class = shift;
bless {}, $class;
}
1;
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