X-Git-Url: http://git.shiar.nl/barcat.git/blobdiff_plain/ba4406a60d218341b89196f2466459e4b2384996..6f29b87c2b358bddad61e79a9aaa35a31244b162:/barcat

diff --git a/barcat b/barcat
index a69bbe5..1114656 100755
--- a/barcat
+++ b/barcat
@@ -17,7 +17,13 @@ my %opt;
 GetOptions(\%opt,
 	'color|c!',
 	'C' => sub { $opt{color} = 0 },
-	'field|f=s',
+	'field|f=s' => sub {
+		eval {
+			local $_ = $_[1];
+			$opt{anchor} = /^[0-9]+$/ ? qr/(?:\S*\h+){$_}\K/ : qr/$_/;
+		} or die $@ =~ s/(?: at .+)?$/ for option $_[0]/r;
+	},
+	'human-readable|H!',
 	'interval|t:i',
 	'trim|length|l=s' => sub {
 		my ($optname, $optval) = @_;
@@ -41,6 +47,7 @@ GetOptions(\%opt,
 		);
 	},
 	'markers|m=s',
+	'stat|s!',
 	'unmodified|u!',
 	'width|w=i',
 	'usage|h' => sub { podexit() },
@@ -50,6 +57,9 @@ GetOptions(\%opt,
 $opt{width} ||= $ENV{COLUMNS} || 80;
 $opt{color} //= -t *STDOUT;  # enable on tty
 $opt{trim}   *= $opt{width} / 100 if $opt{trimpct};
+$opt{units}   = [split //, ' kMGTPEZYyzafpnμm'] if $opt{'human-readable'};
+$opt{anchor} //= qr/\A/;
+$opt{'value-length'} = 6 if $opt{units};
 
 if (defined $opt{interval}) {
 	$opt{interval} ||= 1;
@@ -62,14 +72,13 @@ if (defined $opt{interval}) {
 
 $SIG{INT} = 'IGNORE';  # continue after assumed eof
 
-my (@lines, @values);
-my $anchor = !defined $opt{field} ? qr/\A/ :
-	$opt{field} =~ /^[0-9]+$/ ? qr/(?:\S*\h+){$opt{field}}\K/ :
-	$opt{field};
+my (@lines, @values, @order);
+my $valmatch = qr/$opt{anchor} ( \h* -? [0-9]* \.? [0-9]+ (?: e[+-]?[0-9]+ )? |)/x;
 while (readline) {
 	s/\r?\n\z//;
 	s/^\h*// unless $opt{unmodified};
-	push @values, s/$anchor ( \h* -? [0-9]* \.? [0-9]+ |)/\n/x && $1;
+	push @values, s/$valmatch/\n/ && $1;
+	push @order, $1 if length $1;
 	if (defined $opt{trim}) {
 		my $trimpos = abs $opt{trim};
 		if ($trimpos <= 1) {
@@ -88,10 +97,12 @@ sub show_lines {
 
 state $nr = $opt{hidemin} ? $opt{hidemin} - 1 : 0;
 @lines and @lines > $nr or return;
+@lines or return;
+@lines > $nr or return unless $opt{hidemin};
 
-my @order  = sort { $b <=> $a } grep { length } @values;
-my $maxval = $opt{hidemax} ? max @values[0 .. $opt{hidemax} - 1] : $order[0];
-my $minval = min $order[-1], 0;
+@order = sort { $b <=> $a } @order;
+my $maxval = ($opt{hidemax} ? max grep { length } @values[0 .. $opt{hidemax} - 1] : $order[0]) // 0;
+my $minval = min $order[-1] // (), 0;
 my $lenval = $opt{'value-length'} // max map { length } @order;
 my $len    = defined $opt{trim} && $opt{trim} <= 0 ? -$opt{trim} + 1 :
 	max map { length $values[$_] && length $lines[$_] }
@@ -123,15 +134,28 @@ if ($opt{markers} // 1 and $size > 0) {
 	}
 }
 
+@lines > $nr or return if $opt{hidemin};
+
+sub sival {
+	my $unit = int(log($_[0]) / log(1000) - ($_[0] < 1));
+	my $float = $_[0] !~ /^ (?: 0*\.)? [0-9]{1,3} $/x;
+	sprintf('%*.*f%*s',
+		$float ? 5 : 3, $float,  # length and tenths
+		$_[0] / 1000 ** $unit,   # number
+		$float ? 0 : 3,          # unit size
+		$#{$opt{units}} >> 1 < abs $unit ? "e$unit" : $opt{units}->[$unit]
+	);
+}
+
 while ($nr <= $#lines) {
-	$nr >= $opt{hidemax} and last if $opt{hidemax};
+	$nr >= $opt{hidemax} and last if defined $opt{hidemax};
 	my $val = $values[$nr];
 	if (length $val) {
 		my $color = !$opt{color} ? 0 :
 			$val == $order[0] ? 32 : # max
 			$val == $order[-1] ? 31 : # min
 			90;
-		$val = sprintf "%*s", $lenval, $val;
+		$val = $opt{units} ? sival($val) : sprintf "%*s", $lenval, $val;
 		$val = "\e[${color}m$val\e[0m" if $color;
 	}
 	my $line = $lines[$nr] =~ s/\n/$val/r;
@@ -145,6 +169,20 @@ while ($nr <= $#lines) {
 }
 show_lines();
 
+if ($opt{stat}) {
+	if ($opt{hidemin} or $opt{hidemax}) {
+		$opt{hidemin} ||= 1;
+		$opt{hidemax} ||= @lines;
+		printf '%s of ', sum(@values[$opt{hidemin} - 1 .. $opt{hidemax} - 1]) // 0;
+	}
+	my $total = sum @order;
+	printf '%s total', $total;
+	printf ' in %d values', scalar @values;
+	printf ' (%s min, %*.*f avg, %s max)',
+		$order[-1], 0, 2, $total / @order, $order[0];
+	say '';
+}
+
 __END__
 
 =head1 NAME
@@ -183,6 +221,13 @@ A string can indicate the starting position of a value
 or capture the numbers itself,
 for example I<-f'(\d+)'> for the first digits anywhere.
 
+=item -H, --human-readable
+
+Format values using SI unit prefixes,
+turning long numbers like I<12356789> into I<12.4M>.
+Also changes an exponent I<1.602176634e-19> to I<160.2z>.
+Short integers are aligned but kept without decimal point.
+
 =item -t, --interval[=<seconds>]
 
 Interval time to output partial progress.
@@ -236,6 +281,10 @@ or 68% of all entries.
 
 =back
 
+=item -s, --stat
+
+Total statistics after all data.
+
 =item -u, --unmodified
 
 Do not strip leading whitespace.
@@ -291,7 +340,7 @@ Total population history from the World Bank dataset (XML):
 
     curl http://api.worldbank.org/v2/country/1W/indicator/SP.POP.TOTL |
     xmllint --xpath '//*[local-name()="date" or local-name()="value"]' - |
-    sed -r 's,</wb:value>,\n,g; s,(<[^>]+>)+, ,g' | barcat -f1
+    sed -r 's,</wb:value>,\n,g; s,(<[^>]+>)+, ,g' | barcat -f1 -H
 
 Movies per year from prepared JSON data:
 
@@ -307,9 +356,9 @@ Git statistics, such commit count by year:
 
     git log --pretty=%ci | cut -b-4 | uniq -c | barcat
 
-Or the most frequent authors:
+Or the top 3 most frequent authors with statistics over all:
 
-    git shortlog -sn | barcat -L3
+    git shortlog -sn | barcat -L3 -s
 
 Latency history: