use Data::Dumper;
use DXDebug;
use DXUtil;
-
+use LRU;
use strict;
$main::build += $VERSION;
$main::branch += $BRANCH;
-use vars qw($db %prefix_loc %pre);
+use vars qw($db %prefix_loc %pre $lru $lrusize $misses $hits $matchtotal);
$db = undef; # the DB_File handle
%prefix_loc = (); # the meat of the info
%pre = (); # the prefix list
+$hits = $misses = $matchtotal = 1; # cache stats
+$lrusize = 2000; # size of prefix LRU cache
+
+$lru = LRU->newbase('Prefix', $lrusize);
sub load
{
+ # untie every thing
if ($db) {
undef $db;
untie %pre;
%pre = ();
%prefix_loc = ();
}
- $db = tie(%pre, "DB_File", undef, O_RDWR|O_CREAT, 0666, $DB_BTREE) or confess "can't tie \%pre ($!)";
+
+ # tie the main prefix database
+ $db = tie(%pre, "DB_File", undef, O_RDWR|O_CREAT, 0664, $DB_BTREE) or confess "can't tie \%pre ($!)";
my $out = $@ if $@;
do "$main::data/prefix_data.pl" if !$out;
$out = $@ if $@;
- # print Data::Dumper->Dump([\%pre, \%prefix_loc], [qw(pre prefix_loc)]);
- return $out;
+
+ return $out;
}
sub store
# This routine will only do what you ask for, if you wish to be intelligent
# then that is YOUR problem!
#
+
sub get
{
my $key = shift;
- my @out;
- my @outref;
my $ref;
- my $gotkey;
-
- $gotkey = $key;
+ my $gotkey = $key;
return () if $db->seq($gotkey, $ref, R_CURSOR);
return () if $key ne substr $gotkey, 0, length $key;
- @outref = map { $prefix_loc{$_} } split ',', $ref;
- return ($gotkey, @outref);
+ return ($gotkey, map { $prefix_loc{$_} } split ',', $ref);
}
#
sub next
{
my $key = shift;
- my @out;
- my @outref;
my $ref;
my $gotkey;
return () if $db->seq($gotkey, $ref, R_NEXT);
return () if $key ne substr $gotkey, 0, length $key;
- @outref = map { $prefix_loc{$_} } split ',', $ref;
- return ($gotkey, @outref);
+ return ($gotkey, map { $prefix_loc{$_} } split ',', $ref);
}
#
sub matchprefix
{
my $pref = shift;
+ my @partials;
for (my $i = length $pref; $i; $i--) {
+ $matchtotal++;
my $s = substr($pref, 0, $i);
- my @out = get($s);
- if (isdbg('prefix')) {
- my $part = $out[0] || "*";
- $part .= '*' unless $part eq '*' || $part eq $s;
- dbg("Partial prefix: $pref $s $part" );
- }
- return @out if @out && $out[0] eq $s;
+ push @partials, $s;
+ my $p = $lru->get($s);
+ if ($p) {
+ $hits++;
+ if (isdbg('prefix')) {
+ my $percent = sprintf "%.1f", $hits * 100 / $misses;
+ dbg("Partial Prefix Cache Hit: $s Hits: $hits/$misses of $matchtotal = $percent\%");
+ }
+ $lru->put($_, $p) for @partials;
+ return @$p;
+ } else {
+ $misses++;
+ my @out = get($s);
+ if (isdbg('prefix')) {
+ my $part = $out[0] || "*";
+ $part .= '*' unless $part eq '*' || $part eq $s;
+ dbg("Partial prefix: $pref $s $part" );
+ }
+ if (@out && $out[0] eq $s) {
+ $lru->put($_, \@out) for @partials;
+ return @out;
+ }
+ }
}
return ();
}
my $p;
my @parts;
my ($call, $sp, $i);
-
+
LM: foreach $call (split /,/, $calls) {
- # first check if the whole thing succeeds
- my @nout = get($call);
- if (@nout && $nout[0] eq $call) {
- dbg("got exact prefix: $nout[0]") if isdbg('prefix');
- push @out, @nout;
+
+ # first check if the whole thing succeeds either because it is cached
+ # or because it simply is a stored prefix as callsign (or even a prefix)
+ $matchtotal++;
+ $call =~ s/-\d+$//; # ignore SSIDs
+ my $p = $lru->get($call);
+ my @nout;
+ if ($p) {
+ $hits++;
+ if (isdbg('prefix')) {
+ my $percent = sprintf "%.1f", $hits * 100 / $misses;
+ dbg("Prefix Cache Hit: $call Hits: $hits/$misses of $matchtotal = $percent\%");
+ }
+ push @out, @$p;
next;
+ } else {
+ @nout = get($call);
+ if (@nout && $nout[0] eq $call) {
+ $misses++;
+ $lru->put($call, \@nout);
+ dbg("got exact prefix: $nout[0]") if isdbg('prefix');
+ push @out, @nout;
+ next;
+ }
}
# now split the call into parts if required
@nout = get($s);
if (@nout && $nout[0] eq $s) {
dbg("got exact multipart prefix: $call $s") if isdbg('prefix');
+ $misses++;
+ $lru->put($call, \@nout);
push @out, @nout;
next;
}
my @try = get($s);
if (@try && $try[0] eq $s) {
dbg("got 3 part prefix: $call $s") if isdbg('prefix');
+ $misses++;
+ $lru->put($call, \@try);
push @out, @try;
next;
}
my @try = get($s);
if (@try && $try[0] eq $s) {
dbg("got 2 part prefix: $call $s") if isdbg('prefix');
+ $misses++;
+ $lru->put($call, \@try);
push @out, @try;
next;
}
if (@parts == 1) {
@nout = matchprefix($parts[0]);
if (@nout) {
- dbg("got prefix: $call ]") if isdbg('prefix');
+ dbg("got prefix: $call = $nout[0]") if isdbg('prefix');
+ $misses++;
+ $lru->put($call, \@nout);
push @out, @nout;
next;
}
dbg("Compound prefix: $try $part" );
}
if (@try && $try eq $try[0]) {
+ $misses++;
+ $lru->put($call, \@try);
push @out, @try;
} else {
+ $misses++;
+ $lru->put($call, \@nout);
push @out, @nout;
}
} else {
+ $misses++;
+ $lru->put($call, \@nout);
push @out, @nout;
}
next LM;
}
# we are a pirate!
- push @out, matchprefix('Q');
+ @nout = matchprefix('Q');
+ $misses++;
+ $lru->put($call, \@nout);
+ push @out, @nout;
}
- if (isdbg('prefix')) {
+ if (isdbg('prefixdata')) {
my $dd = new Data::Dumper([ \@out ], [qw(@out)]);
dbg($dd->Dumpxs);
}