viewvc.cgi/maps/NMEA.pm

package NMEA;

use strict;
use warnings;

use Data::Dump qw/dump/;

sub hhmm {
        my $a = shift;
        if ( $a =~ m/^(\d+)(\d\d\.\d\d+)$/ ) {
                return sprintf("%1.6f", $1 + ( $2 / 60 ));
        } else {
                warn "## skipped $a\n";
                return;
        }
}

my $got_it;

sub line {
        my $self = shift;
        my $l = shift || return;

        if ( m/\$GPRMC/ ) {
                chomp;
                my @a = split(/,/,$_);

                return unless $#a == 12;

#               warn "## [$#a] ", join(' ', map { "$_:$a[$_]" } ( 0 .. $#a )), " from $_\n";

                # is valid?
                return unless $a[2] eq 'A';

                my $hash;
                my $i = 1; # skip GPRMC;
                $hash->{$_} = $a[$i++] foreach ( qw/
                        time validity lat_hhmm lat_ns lon_hhmm lon_ew speed course date var var_ew
                / );

                $hash->{lat} = hhmm( ( $hash->{lat_ns} eq 'S' ? -1 : 1 ) * $hash->{lat_hhmm} ) || return;
                $hash->{lon} = hhmm( ( $hash->{lon_ew} eq 'W' ? -1 : 1 ) * $hash->{lon_hhmm} ) || return;

                return if ( $got_it->{ $hash->{lat} . ' ' . $hash->{lon} }++ );

#               warn "##>>>> ",dump( $hash );
                return $hash;
        }

        return;
}

1;
1	package NMEA;
2
3	use strict;
4	use warnings;
5
6	use Data::Dump qw/dump/;
7
8	sub hhmm {
9	my $a = shift;
10	if ( $a =~ m/^(\d+)(\d\d\.\d\d+)$/ ) {
11	return sprintf("%1.6f", $1 + ( $2 / 60 ));
12	} else {
13	warn "## skipped $a\n";
14	return;
15	}
16	}
17
18	my $got_it;
19
20	sub line {
21	my $self = shift;
22	my $l = shift \|\| return;
23
24	if ( m/\$GPRMC/ ) {
25	chomp;
26	my @a = split(/,/,$_);
27
28	return unless $#a == 12;
29
30	# warn "## [$#a] ", join(' ', map { "$_:$a[$_]" } ( 0 .. $#a )), " from $_\n";
31
32	# is valid?
33	return unless $a[2] eq 'A';
34
35	my $hash;
36	my $i = 1; # skip GPRMC;
37	$hash->{$_} = $a[$i++] foreach ( qw/
38	time validity lat_hhmm lat_ns lon_hhmm lon_ew speed course date var var_ew
39	/ );
40
41	$hash->{lat} = hhmm( ( $hash->{lat_ns} eq 'S' ? -1 : 1 ) * $hash->{lat_hhmm} ) \|\| return;
42	$hash->{lon} = hhmm( ( $hash->{lon_ew} eq 'W' ? -1 : 1 ) * $hash->{lon_hhmm} ) \|\| return;
43
44	return if ( $got_it->{ $hash->{lat} . ' ' . $hash->{lon} }++ );
45
46	# warn "##>>>> ",dump( $hash );
47	return $hash;
48	}
49
50	return;
51	}
52
53	1;