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package Cache::CacheUtilities;
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require 5.004;
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use Data::Dumper;
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BEGIN {
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$Cache::CacheUtilities::zipUntility="GZip";
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$Data::Dumper::Varname='cache';
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}
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sub read()
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{
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my ($file) = @_;
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my $data=();
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my $func="read${zipUntility}";
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&$func($file,\$data);
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my $cache = eval "$data";
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die "Cache $file load error: ",$@,"\n", if ($@);
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return $cache;
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}
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sub write()
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{
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my ($cache,$file)=@_;
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use File::Copy;
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if (-r $file){move($file,"${file}.bak");}
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my $ok=1; my $err="";
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my $fcache=();
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eval {$fcache=Dumper($cache);};
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if ($@){$err=$@;$ok=0;}
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else
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{
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my $func="write${zipUntility}";
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$ok = &$func($fcache,$file);
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}
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if ($ok)
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{
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unlink ("${file}.bak");
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my $mode=0644;
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chmod $mode,$file;
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}
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else
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{
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if (-r "${file}.bak"){move("${file}.bak",$file);}
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die "ERROR: Writing Cache file $file: $err\n";
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}
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return;
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}
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###### Using gzip #################
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sub readGZip()
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{
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my $file = shift;
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my $data = shift;
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my $gz;
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if (open($gz,"gzip -cd $file |"))
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{
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binmode $gz;
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my $buf;
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while (read($gz,$buf,1024*1024) > 0){${$data}.=$buf;}
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close($gz);
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}
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else{die "Can not open file for reading using \"gzip\": $file\n";}
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return;
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}
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sub writeGZip()
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{
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my ($cache,$file) = @_;
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my $gz;
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if (open($gz,"| gzip >$file"))
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{
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binmode $gz;
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print $gz $cache;
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close($gz);
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}
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else{die "Can not open file for reading using \"gzip\": $file\n";}
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return 1;
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}
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1;
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