X-Git-Url: http://dxcluster.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=perl%2FPrefix.pm;h=a07ebdbdde8ff5dc8fd727bd5784829b1729001c;hb=f87323c2926605792ee02b84783d8f3d4dbd605f;hp=4e0b454698408a0e4764c0194f978a0f1d61d9d0;hpb=65744dd1e30165cd280502ee1a05c0c640023303;p=spider.git

diff --git a/perl/Prefix.pm b/perl/Prefix.pm
index 4e0b4546..a07ebdbd 100644
--- a/perl/Prefix.pm
+++ b/perl/Prefix.pm
@@ -8,85 +8,401 @@
 
 package Prefix;
 
-use Carp;
+use IO::File;
 use DXVars;
 use DB_File;
+use Data::Dumper;
+use DXDebug;
+use DXUtil;
+use LRU;
 
 use strict;
 
-my $db;     # the DB_File handle
-my %prefix_loc;   # the meat of the info
-my %prefix;       # the prefix list
+use vars qw($VERSION $BRANCH);
+$VERSION = sprintf( "%d.%03d", q$Revision$ =~ /(\d+)\.(\d+)/ );
+$BRANCH = sprintf( "%d.%03d", q$Revision$ =~ /\d+\.\d+\.(\d+)\.(\d+)/  || (0,0));
+$main::build += $VERSION;
+$main::branch += $BRANCH;
+
+use vars qw($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 = 1000;				# size of prefix LRU cache
+
+$lru = LRU->newbase('Prefix', $lrusize);
 
 sub load
 {
-  if ($db) {
-    untie %prefix;
-	%prefix = ();
-	%prefix_loc = ();
-  }
-  $db = tie(%prefix, "DB_File", undef, O_RDWR|O_CREAT, 0, $DB_BTREE) or confess "can't tie %prefix ($!)";  
-  do "$main::data/prefix_data.pl";
-  confess $@ if $@;
+	# untie every thing
+	if ($db) {
+		undef $db;
+		untie %pre;
+		%pre = ();
+		%prefix_loc = ();
+	}
+
+	# 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 $@;
+
+ 	return $out;
 }
 
 sub store
 {
-  my ($k, $l);
-  my $fh = new FileHandle;
-  my $fn = "$main::data/prefix_data.pl";
+	my ($k, $l);
+	my $fh = new IO::File;
+	my $fn = "$main::data/prefix_data.pl";
   
-  confess "Prefix system not started" if !$db;
+	confess "Prefix system not started" if !$db;
   
-  # save versions!
-  rename "$fn.oooo", "$fn.ooooo" if -e "$fn.oooo";
-  rename "$fn.ooo", "$fn.oooo" if -e "$fn.ooo";
-  rename "$fn.oo", "$fn.ooo" if -e "$fn.oo";
-  rename "$fn.o", "$fn.oo" if -e "$fn.o";
-  rename "$fn", "$fn.o" if -e "$fn";
+	# save versions!
+	rename "$fn.oooo", "$fn.ooooo" if -e "$fn.oooo";
+	rename "$fn.ooo", "$fn.oooo" if -e "$fn.ooo";
+	rename "$fn.oo", "$fn.ooo" if -e "$fn.oo";
+	rename "$fn.o", "$fn.oo" if -e "$fn.o";
+	rename "$fn", "$fn.o" if -e "$fn";
   
-  $fh->open(">$fn") or die "Can't open $fn ($!)";
-
-  # prefix location data
-  $fh->print("%prefix_loc = (\n");
-  foreach $l (sort {$a <=> $b} keys %prefix_loc) {
-    my $r = $prefix_loc{$l};
-	$fh->printf("   $l => { name => '%s', dxcc => %d, itu => %d, utcoff => %d, lat => %f, long => %f },\n",
-	            $r->{name}, $r->{dxcc}, $r->{itu}, $r->{cq}, $r->{utcoff}, $r->{lat}, $r->{long});
-  }
-  $fh->print(");\n\n");
-
-  # prefix data
-  $fh->print("%prefix = (\n");
-  foreach $k (sort keys %prefix) {
-    $fh->print("   '$k' => [");
-	my @list = @{$prefix{$k}};
-	my $l;
-	my $str;
-	foreach $l (@list) {
-      $str .= " $l,";
-    }
-	chop $str;  
-	$fh->print("$str ],\n");
-  }
-  $fh->print(");\n");
-  $fh->close;
+	$fh->open(">$fn") or die "Can't open $fn ($!)";
+
+	# prefix location data
+	$fh->print("%prefix_loc = (\n");
+	foreach $l (sort {$a <=> $b} keys %prefix_loc) {
+		my $r = $prefix_loc{$l};
+		$fh->printf("   $l => bless( { name => '%s', dxcc => %d, itu => %d, utcoff => %d, lat => %f, long => %f }, 'Prefix'),\n",
+					$r->{name}, $r->{dxcc}, $r->{itu}, $r->{cq}, $r->{utcoff}, $r->{lat}, $r->{long});
+	}
+	$fh->print(");\n\n");
+
+	# prefix data
+	$fh->print("%pre = (\n");
+	foreach $k (sort keys %pre) {
+		$fh->print("   '$k' => [");
+		my @list = @{$pre{$k}};
+		my $l;
+		my $str;
+		foreach $l (@list) {
+			$str .= " $l,";
+		}
+		chop $str;  
+		$fh->print("$str ],\n");
+	}
+	$fh->print(");\n");
+	undef $fh;
+	untie %pre; 
 }
 
-# this may return several entries, be warned!
-#
-# what you get is a list of pairs of:-
+# what you get is a list that looks like:-
 # 
-# prefix => \[ @list of references to prefix_locs ]
+# prefix => @list of blessed references to prefix_locs 
 #
 # 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 $ref;
+	my $gotkey = $key;
+	return () if $db->seq($gotkey, $ref, R_CURSOR);
+	return () if $key ne substr $gotkey, 0, length $key;
+
+	return ($gotkey,  map { $prefix_loc{$_} } split ',', $ref);
+}
+
+#
+# get the next key that matches, this assumes that you have done a 'get' first
+#
+# 
+sub next
+{
+	my $key = shift;
+	my $ref;
+	my $gotkey;
   
+	return () if $db->seq($gotkey, $ref, R_NEXT);
+	return () if $key ne substr $gotkey, 0, length $key;
+  
+	return ($gotkey, map { $prefix_loc{$_} } split ',', $ref);
+}
+
+# 
+# search for the nearest match of a prefix string (starting
+# from the RH end of the string passed)
+#
+
+sub matchprefix
+{
+	my $pref = shift;
+	my @partials;
+
+	for (my $i = length $pref; $i; $i--) {
+		$matchtotal++;
+		my $s = substr($pref, 0, $i);
+		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 ();
 }
 
+#
+# extract a 'prefix' from a callsign, in other words the largest entity that will
+# obtain a result from the prefix table.
+#
+# This is done by repeated probing, callsigns of the type VO1/G1TLH or
+# G1TLH/VO1 (should) return VO1
+#
+
+sub extract
+{
+	my $calls = uc shift;
+	my @out;
+	my $p;
+	my @parts;
+	my ($call, $sp, $i);
+
+LM:	foreach $call (split /,/, $calls) {
+
+		# 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: $nout[0]") if isdbg('prefix');
+				push @out, @nout;
+				next;
+			}
+		}
+
+		# now split the call into parts if required
+		@parts = ($call =~ '/') ? split('/', $call) : ($call);
+		dbg("Parts: $call = " . join(' ', @parts))	if isdbg('prefix');
+
+		# remove any /0-9 /P /A /M /MM /AM suffixes etc
+		if (@parts > 1) {
+			@parts = grep { !/^\d+$/ && !/^[PABM]$/ && !/^(?:|AM|MM|BCN|JOTA|SIX|WEB|NET|Q\w+)$/; } @parts;
+
+			# can we resolve them by direct lookup
+			my $s = join('/', @parts); 
+			@nout = get($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;
+			}
+		}
+		dbg("Parts now: $call = " . join(' ', @parts))	if isdbg('prefix');
+  
+		# at this point we should have two or three parts
+		# if it is three parts then join the first and last parts together
+		# to get an answer
+
+		# first deal with prefix/x00xx/single letter things
+		if (@parts == 3 && length $parts[0] <= length $parts[1]) {
+			@nout = matchprefix($parts[0]);
+			if (@nout) {
+				my $s = join('/', $nout[0], $parts[2]);
+				my @try = get($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;
+				}
+				
+				# if the second part is a callsign and the last part is one letter
+				if (is_callsign($parts[1]) && length $parts[2] == 1) {
+					pop @parts;
+				}
+			}
+		}
+
+		# if it is a two parter 
+		if (@parts == 2) {
+
+			# try it as it is as compound, taking the first part as the prefix
+			@nout = matchprefix($parts[0]);
+			if (@nout) {
+				my $s = join('/', $nout[0], $parts[1]);
+				my @try = get($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;
+				}
+			}
+		}
+
+		# remove the problematic /J suffix
+		pop @parts if @parts > 1 && $parts[$#parts] eq 'J';
+
+		# single parter
+		if (@parts == 1) {
+			@nout = matchprefix($parts[0]);
+			if (@nout) {
+				dbg("got prefix: $call = $nout[0]") if isdbg('prefix');
+				$misses++;
+				$lru->put($call, \@nout);
+				push @out, @nout;
+				next;
+			}
+		}
+
+		# try ALL the parts
+        my @checked;
+		my $n;
+L1:		for ($n = 0; $n < @parts; $n++) {
+			my $sp = '';
+			my ($k, $i);
+			for ($i = $k = 0; $i < @parts; $i++) {
+				next if $checked[$i];
+				my $p = $parts[$i];
+				if (!$sp || length $p < length $sp) {
+					dbg("try part: $p") if isdbg('prefix');
+					$k = $i;
+					$sp = $p;
+				}
+			}
+			$checked[$k] = 1;
+			$sp =~ s/-\d+$//;     # remove any SSID
+			
+			# now start to resolve it from the right hand end
+			@nout = matchprefix($sp);
+			
+			# try and search for it in the descriptions as
+			# a whole callsign if it has multiple parts and the output
+			# is more two long, this should catch things like
+			# FR5DX/T without having to explicitly stick it into
+			# the prefix table.
+			
+			if (@nout) {
+				if (@parts > 1) {
+					$parts[$k] = $nout[0];
+					my $try = join('/', @parts);
+					my @try = get($try);
+					if (isdbg('prefix')) {
+						my $part = $try[0] || "*";
+						$part .= '*' unless $part eq '*' || $part eq $try;
+						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!
+		@nout = matchprefix('Q');
+		$misses++;
+		$lru->put($call, \@nout);
+		push @out, @nout;
+	}
+	
+	if (isdbg('prefixdata')) {
+		my $dd = new Data::Dumper([ \@out ], [qw(@out)]);
+		dbg($dd->Dumpxs);
+	}
+	return @out;
+}
+
+my %valid = (
+			 lat => '0,Latitude,slat',
+			 long => '0,Longitude,slong',
+			 dxcc => '0,DXCC',
+			 name => '0,Name',
+			 itu => '0,ITU',
+			 cq => '0,CQ',
+			 utcoff => '0,UTC offset',
+			 cont => '0,Continent',
+			);
+
+no strict;
+sub AUTOLOAD
+{
+	my $self = shift;
+	my $name = $AUTOLOAD;
+  
+	return if $name =~ /::DESTROY$/;
+	$name =~ s/.*:://o;
+  
+	confess "Non-existant field '$AUTOLOAD'" if !$valid{$name};
+	# this clever line of code creates a subroutine which takes over from autoload
+	# from OO Perl - Conway
+	*{$AUTOLOAD} = sub {@_ > 1 ? $_[0]->{$name} = $_[1] : $_[0]->{$name}} ;
+	if (@_) {
+		$self->{$name} = shift;
+	}
+	return $self->{$name};
+}
+use strict;
+
+#
+# return a prompt for a field
+#
+
+sub field_prompt
+{ 
+	my ($self, $ele) = @_;
+	return $valid{$ele};
+}
 1;
 
 __END__