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package GeometryStore;
# ******************************************************************
# Description : Store and retrieve geometry
# Author : Chad Elliott
# Create Date : 1/5/2006
# ******************************************************************
# ******************************************************************
# Pragma Section
# ******************************************************************
use strict;
use Errno qw(ENOLCK);
use FileHandle;
use Fcntl qw(:DEFAULT :flock);
# ************************************************************
# Data Section
# ************************************************************
our($VERSION) = '1.0.2';
my($file) = (defined $ENV{HOME} ? $ENV{HOME} : '' ) . '/.geometry';
# ************************************************************
# Subroutine Section
# ************************************************************
sub store {
my($name) = shift;
my($geom) = shift;
my($fh) = new FileHandle();
if (open($fh, "+<$file")) {
my($locked) = flock($fh, LOCK_EX | LOCK_NB);
## If we were able to lock the file or locking is not
## supported by the OS, then we will go ahead and write
if ($locked || $! == ENOLCK) {
my(@lines) = ();
my($re) = $name;
$re =~ s/([\+\-\\\$\[\]\(\)\.])/\\$1/g;
while(<$fh>) {
if ($_ !~ /^$re:/) {
push(@lines, $_);
}
}
seek($fh, 0, 0);
truncate($fh, 0);
foreach my $line (@lines) {
print $fh $line;
}
print $fh "$name: $geom\n";
close($fh);
}
}
}
sub retrieve {
my($name) = shift;
my($fh) = new FileHandle();
if (open($fh, $file)) {
$name =~ s/([\+\-\\\$\[\]\(\)\.])/\\$1/g;
while(<$fh>) {
if (/^\s*$name:\s+(\d+x\d+)(\+[\-]?\d+\+[\-]?\d+)/) {
return $1, $2;
}
}
close($fh);
}
return '', '';
}
1;
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