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package Sack::Digest; |
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|
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# digest to convert long values into integer numbers |
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|
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use warnings; |
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use strict; |
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|
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use BerkeleyDB; |
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|
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our $debug = 0; |
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our $port = '?'; |
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|
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sub clean { |
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foreach ( glob '/dev/shm/sack.*' ) { |
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warn "[$port] clean $_ ", -s $_, " bytes\n"; |
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unlink $_ || warn "[$port] ERROR can't remove $_:$!"; |
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} |
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1; |
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} |
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|
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our ( $btree, $array ); |
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our ( %btree, @array ); |
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our $self; |
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|
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sub open { |
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( $self, $port ) = @_; |
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|
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my $path = "/dev/shm/sack.$port"; |
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|
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$btree ||= tie %btree, 'BerkeleyDB::Btree', |
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-Filename => "$path.btree", |
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# -Cachesize => 700_000_000, |
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-Flags => DB_CREATE |
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|| die "$path.btree $!"; |
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|
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$array ||= tie @array, 'BerkeleyDB::Recno', |
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-Filename => "$path.array", |
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# -Cachesize => 700_000_000, |
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-Flags => DB_CREATE, |
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|| die "$path.array $!"; |
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|
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warn "[$port] BDB open $path\n"; |
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|
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} |
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|
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sub close { |
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my $error = 0; |
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$error += $btree->db_close; |
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undef $btree; |
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$error += $array->db_close; |
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undef $array; |
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not $error; |
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} |
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|
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our $seq = 0; |
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|
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sub to_int { |
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my ( $self, $full ) = @_; |
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my $nr; |
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|
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|
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if ( my $nr = $btree{ $full } ) { |
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return $nr; |
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} else { |
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$seq++; |
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$btree{ $full } = $seq; |
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$array[ $seq ] = $full; |
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return $seq; |
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} |
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} |
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|
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|
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sub from_int { |
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my ( $self, $d ) = @_; |
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my $v = $array[ $d ]; |
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defined $v ? $v : $d; |
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} |
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|
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1; |