delete little joke from pod description

[barcat.git] / barcat

diff --git a/barcat b/barcat
index 7f442a54f97e410cd6f684d1e4e2598795c5d137..753e323a0ebe376109d38f4e5f3d444334e3eb92 100755 (executable)
--- a/barcat
+++ b/barcat
@@ -4,92 +4,127 @@ use warnings;
 use utf8;
 use List::Util qw( min max sum );
 use open qw( :std :utf8 );
 use utf8;
 use List::Util qw( min max sum );
 use open qw( :std :utf8 );

+use re '/msx';

 
 

-our $VERSION = '1.06';
+our $VERSION = '1.09';

 
 

-use Getopt::Long '2.33', qw( :config gnu_getopt );

 my %opt;
 my %opt;

+if (@ARGV) {
+require Getopt::Long;
+Getopt::Long->import('2.33', qw( :config gnu_getopt ));

 GetOptions(\%opt,
 GetOptions(\%opt,

-       'color|c!',
-       'C' => sub { $opt{color} = 0 },
+       'ascii|a!',
+       'color|C!',
+       'M' => sub { $opt{color} = 0 },

        'field|f=s' => sub {
                eval {
                        local $_ = $_[1];
        'field|f=s' => sub {
                eval {
                        local $_ = $_[1];

-                       $opt{anchor} = /^[0-9]+$/ ? qr/(?:\S*\h+){$_}\K/ : qr/$_/;
-               } or die $@ =~ s/(?: at .+)?$/ for option $_[0]/r;
+                       s/\A[0-9]+\z/(?:\\S*\\h+){$_}\\K/;
+                       s{\A[+]([0-9]*)\z}{
+                               (!!$1 && '(?:\d+\D+\b){'.$1.'}\K') . '\s* (?=\d)'
+                       }e;
+                       $opt{anchor} = qr/$_/;
+               } or die $@ =~ s/(?:\ at\ \N+)?\Z/ for option $_[0]/r;

        },
        },

+       'count|c!',

        'human-readable|H!',
        'human-readable|H!',

+       'sexagesimal!',
+       'reformat!',

        'interval|t:i',
        'trim|length|l=s' => sub {
                my ($optname, $optval) = @_;
                $optval =~ s/%$// and $opt{trimpct}++;
        'interval|t:i',
        'trim|length|l=s' => sub {
                my ($optname, $optval) = @_;
                $optval =~ s/%$// and $opt{trimpct}++;

-               $optval =~ m/^-?[0-9]+$/ or die(
+               $optval =~ m/\A-?[0-9]+\z/ or die(

                        "Value \"$optval\" invalid for option $optname",
                        " (number or percentage expected)\n"
                );
                $opt{trim} = $optval;
        },
        'value-length=i',
                        "Value \"$optval\" invalid for option $optname",
                        " (number or percentage expected)\n"
                );
                $opt{trim} = $optval;
        },
        'value-length=i',

-       'hidemin=i',
-       'hidemax=i',

        'minval=f',
        'maxval=f',
        'limit|L:s' => sub {
                my ($optname, $optval) = @_;
                $optval ||= 0;
        'minval=f',
        'maxval=f',
        'limit|L:s' => sub {
                my ($optname, $optval) = @_;
                $optval ||= 0;

-               ($opt{hidemin}, $opt{hidemax}) =
-               $optval =~ m/\A (?: ([0-9]+)? - )? ([0-9]+)? \z/x or die(
+               $optval =~ /\A-[0-9]+\z/ and $optval .= '-';  # tail shorthand
+               $optval =~ s/[+]/--/;
+               my ($start, $end) =
+               $optval =~ m/\A (?: (-? [0-9]+)? - )? (-? [0-9]+)? \z/ or die(

                        "Value \"$optval\" invalid for option limit",
                        " (range expected)\n"
                );
                        "Value \"$optval\" invalid for option limit",
                        " (range expected)\n"
                );

+               $start ||= 1;
+               $start--;
+               s/\A-0*\z// and $_ ||= undef for $end // ();
+
+               $opt{hidemin} = sub {
+                       my ($lines) = @_;
+                       if ($start < 0) {
+                               return max(0, $lines + $start + 2);
+                       }
+                       return $start;
+               } if $start;
+               $opt{hidemax} = sub {
+                       my ($limit, $offset) = @_;
+                       if ($end < 0) {
+                               return $offset - $end - 1; # count
+                       }
+                       elsif ($start < 0) {
+                               return $limit - $end + 1; # bottom
+                       }
+                       elsif ($end <= $limit) {
+                               return $end - 1; # less
+                       }
+                       return $limit;
+               } if defined $end;

        },
        },

+       'log|e!',

        'header!',
        'markers|m=s',
        'graph-format=s' => sub {
                $opt{'graph-format'} = substr $_[1], 0, 1;
        },
        'header!',
        'markers|m=s',
        'graph-format=s' => sub {
                $opt{'graph-format'} = substr $_[1], 0, 1;
        },

-       'spark:s' => sub {
-               $opt{spark} = [split //, $_[1] || ' ▁▂▃▄▅▆▇█'];
-       },
+       'spark|_!',
+       'indicators:s',

        'palette=s' => sub {
                $opt{palette} = {
        'palette=s' => sub {
                $opt{palette} = {

+                       ''     => [],

                        fire   => [qw( 90 31 91 33 93 97 96 )],
                        fire   => [qw( 90 31 91 33 93 97 96 )],

-                       fire88 => [map {"38;5;$_"} qw(
-                               80  32 48 64  68 72 76  77 78 79  47
-                       )],

                        fire256=> [map {"38;5;$_"} qw(
                                235  52 88 124 160 196
                                202 208 214 220 226  227 228 229 230 231  159
                        )],
                        fire256=> [map {"38;5;$_"} qw(
                                235  52 88 124 160 196
                                202 208 214 220 226  227 228 229 230 231  159
                        )],

-                       ramp88 => [map {"38;5;$_"} qw(
-                               64 65 66 67 51 35 39 23 22 26 25 28
-                       )],

                        whites => [qw( 1;30 0;37 1;37 )],
                        whites => [qw( 1;30 0;37 1;37 )],

-                       greys  => [map {"38;5;$_"} 52, 235..255, 47],
-               }->{$_[1]} // [ split /[^0-9;]/, $_[1] ];
+                       grays  => [map {"38;5;$_"} 0, 232..255, 15],
+                       random => [map {"38;5;$_"} List::Util::shuffle(17..231)],
+                       rainbow=> [map {"38;5;$_"}
+                               196, # r
+                               (map { 196 + $_*6   } 0..4), # +g
+                               (map { 226 - $_*6*6 } 0..4), # -r
+                               (map {  46 + $_     } 0..4), # +b
+                               (map {  51 - $_*6   } 0..4), # -g
+                               (map {  21 + $_*6*6 } 0..4), # +r
+                               (map { 201 - $_     } 0..4), # -b
+                               196,
+                       ],
+               }->{$_[1]} // do {
+                       my @vals = split /[^0-9;]/, $_[1]
+                               or die "Empty palette resulting from \"$_[1]\"\n";
+                       \@vals;
+               };

        },
        'stat|s!',
        },
        'stat|s!',

+       'report=s',

        'signal-stat=s',
        'unmodified|u!',
        'width|w=i',
        'signal-stat=s',
        'unmodified|u!',
        'width|w=i',

-       'version' => sub {
-               say "barcat version $VERSION";
+       'version|V' => sub {
+               my $mascot = $opt{ascii} ? '=^,^=' : 'ฅ^•ﻌ•^ฅ';
+               say "barcat $mascot version $VERSION";

                exit;
        },
        'usage|h' => sub {
                exit;
        },
        'usage|h' => sub {

-               local $/;
-               my $pod = readline *DATA;
-               $pod =~ s/^=over\K/ 22/m;  # indent options list
-               $pod =~ s/^=item \N*\n\n\N*\n\K(?:(?:^=over.*?^=back\n)?(?!=)\N*\n)*/\n/msg;
-
-               require Pod::Usage;
-               my $parser = Pod::Usage->new;
-               $parser->select('SYNOPSIS', 'OPTIONS');
-               $parser->output_string(\my $contents);
-               $parser->parse_string_document($pod);
-
-               $contents =~ s/\n(?=\n\h)//msg;  # strip space between items
-               print $contents;
+               /^=/ ? last : print for readline *DATA;  # text between __END__ and pod

                exit;
        },
        'help|?'  => sub {
                exit;
        },
        'help|?'  => sub {


@@ -99,22 +134,62 @@ GetOptions(\%opt,
                );
        },
 ) or exit 64;  # EX_USAGE
                );
        },
 ) or exit 64;  # EX_USAGE

+}

 
 $opt{width} ||= $ENV{COLUMNS} || qx(tput cols) || 80 unless $opt{spark};
 
 $opt{width} ||= $ENV{COLUMNS} || qx(tput cols) || 80 unless $opt{spark};

-$opt{color} //= -t *STDOUT;  # enable on tty
+$opt{color} //= $ENV{NO_COLOR} ? 0 : -t *STDOUT;  # enable on tty

 $opt{'graph-format'} //= '-';
 $opt{trim}   *= $opt{width} / 100 if $opt{trimpct};
 $opt{'graph-format'} //= '-';
 $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 $opt{units};
+$opt{units}   = [split //, ' kMGTPEZYRQqryzafpn'.($opt{ascii} ? 'u' : 'μ').'m']
+       if $opt{'human-readable'};
+$opt{'value-length'} = 4 if $opt{units};

 $opt{'value-length'} = 1 if $opt{unmodified};
 $opt{'signal-stat'} //= exists $SIG{INFO} ? 'INFO' : 'QUIT';
 $opt{markers} //= '=avg >31.73v <68.27v +50v |0';
 $opt{'value-length'} = 1 if $opt{unmodified};
 $opt{'signal-stat'} //= exists $SIG{INFO} ? 'INFO' : 'QUIT';
 $opt{markers} //= '=avg >31.73v <68.27v +50v |0';

+$opt{report} //= join('',
+       '${partsum+; $_ .= " of "}',
+       '${sum+; color(1); $_ .= " total in "}',
+       '${count#} values',
+       '${lines#; $_ = $_ != @order && " over $_ lines"}',
+       sprintf('${count: (%s)}', join ', ',
+               '${min; color(31)} min',
+               '${avg; $opt{reformat} or $_ = sprintf "%0.2f", $_; color(36)} avg',
+               '${max; color(32)} max',
+       ),
+);

 $opt{palette} //= $opt{color} && [31, 90, 32];
 $opt{palette} //= $opt{color} && [31, 90, 32];

-$opt{input} = @ARGV && $ARGV[0] =~ m/\A[-0-9]/ ? \@ARGV : undef
+$opt{indicators} = [split //, $opt{indicators} ||
+       ($opt{ascii} ? ' .oO' : $opt{spark} ? ' ▁▂▃▄▅▆▇█' : ' ▏▎▍▌▋▊▉█')
+] if defined $opt{indicators} or $opt{spark};
+$opt{input} = (@ARGV && $ARGV[0] =~ m/\A[-0-9]/) ? \@ARGV : undef

        and undef $opt{interval};
 
        and undef $opt{interval};
 

-my (@lines, @values, @order);
+$opt{'calc-format'} = sub { sprintf '%*.*f', 0, 2, $_[0] };
+$opt{'value-format'} = $opt{sexagesimal} ? sub {
+       my $s = abs($_[0]) + .5;
+       sprintf('%s%d:%02d:%02d', $_[0] < 0 && '-', $s/3600, $s/60%60, $s%60);
+} : $opt{units} && sub {
+       my $unit = (
+               log(abs $_[0] || 1) / log(10)
+               - 3 * (abs($_[0]) < .9995)   # shift to smaller unit if below 1
+               + 1e-15  # float imprecision
+       );
+       my $decimal = ($unit % 3) == ($unit < 0);
+       $unit -= log($decimal ? .995 : .9995) / log(10);  # rounded
+       $decimal = ($unit % 3) == ($unit < 0);
+       $decimal &&= $_[0] !~ /^-?0*[0-9]{1,3}$/;  # integer 0..999
+       sprintf('%*.*f%1s',
+               3 + ($_[0] < 0), # digits plus optional negative sign
+               $decimal,  # tenths
+               $_[0] / 1000 ** int($unit/3),  # number
+               $#{$opt{units}} * 1.5 < abs $unit ? sprintf('e%d', $unit) :
+                       $opt{units}->[$unit/3]  # suffix
+       );
+} and $opt{reformat}++;
+$opt{'value-format'} ||= sub { sprintf '%.8g', $_[0] };
+
+
+my (@lines, @values, @order, %uniq);

 
 $SIG{$_} = \&show_stat for $opt{'signal-stat'} || ();
 $SIG{ALRM} = sub {
 
 $SIG{$_} = \&show_stat for $opt{'signal-stat'} || ();
 $SIG{ALRM} = sub {


@@ -130,36 +205,49 @@ if (defined $opt{interval}) {
        eval {
                require Tie::Array::Sorted;
                tie @order, 'Tie::Array::Sorted', sub { $_[1] <=> $_[0] };
        eval {
                require Tie::Array::Sorted;
                tie @order, 'Tie::Array::Sorted', sub { $_[1] <=> $_[0] };

-       } or warn $@, "Expect slowdown with large datasets!\n";
+       } or warn $@, "Expect slowdown with large datasets!\n"
+               unless $opt{count};

 }
 
 }
 

-my $valmatch = qr<
-       $opt{anchor} ( \h* -? [0-9]* \.? [0-9]+ (?: e[+-]?[0-9]+ )? |)
->x;
+my $float = qr<[0-9]* [.]? [0-9]+ (?: e[+-]?[0-9]+ )?>; # positive numberish
+my $valmatch = $opt{anchor} // qr/\A/;
+$valmatch .= !$opt{count} ? qr/( \h* -? $float |)/ :
+       $opt{anchor} ? qr/(\S*)/ : qr/(.*)/;
+

 while (defined ($_ = $opt{input} ? shift @{ $opt{input} } : readline)) {
        s/\r?\n\z//;
 while (defined ($_ = $opt{input} ? shift @{ $opt{input} } : readline)) {
        s/\r?\n\z//;

-       s/^\h*// unless $opt{unmodified};
-       push @values, s/$valmatch/\n/ && $1;
-       push @order, $1 if length $1;
-       if (defined $opt{trim} and defined $1) {
+       my $valnum;
+       if ($opt{count}) {
+               $valnum = m/$valmatch/ && $1;
+               $uniq{$valnum}++ and next;
+               push @values, $valnum;
+               s/\A/\n /;
+       }
+       else {
+               s/\A\h*// unless $opt{unmodified};
+               $valnum = s/$valmatch/\n/ && $1;
+               push @values, $valnum;
+               push @order, $valnum if length $valnum;
+       }
+
+       if (defined $opt{trim} and defined $valnum) {

                my $trimpos = abs $opt{trim};
                my $trimpos = abs $opt{trim};

-               $trimpos -= length $1 if $opt{unmodified};
+               $trimpos -= length $valnum if $opt{unmodified};

                if ($trimpos <= 1) {
                        $_ = substr $_, 0, 2;
                }
                elsif (length > $trimpos) {
                if ($trimpos <= 1) {
                        $_ = substr $_, 0, 2;
                }
                elsif (length > $trimpos) {

-                       substr($_, $trimpos - 1) = '…';
+                       # cut and replace (intentional lvalue for speed, contrary to PBP)
+                       substr($_, $trimpos - 1) = $opt{ascii} ? '>' : '…';

                }
        }
        push @lines, $_;
                }
        }
        push @lines, $_;

+}
+continue {

        show_lines() if defined $opt{interval} and $opt{interval} < 0
                and $. % $opt{interval} == 0;
 }
 
        show_lines() if defined $opt{interval} and $opt{interval} < 0
                and $. % $opt{interval} == 0;
 }
 

-if ($opt{'zero-missing'}) {
-       push @values, (0) x 10;
-}
-

 $SIG{INT} = 'DEFAULT';
 
 sub color {
 $SIG{INT} = 'DEFAULT';
 
 sub color {


@@ -170,134 +258,190 @@ sub color {
 
 sub show_lines {
 
 
 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};
+state $nr = $opt{hidemin} ? $opt{hidemin}->($#lines) : 0;
+@lines > $nr or return;
+
+my $limit = $opt{hidemax} ? $opt{hidemax}->($#lines, $nr) : $#lines;
+
+if ($opt{count}) {
+       $_ = $uniq{$_} for @values[$nr .. $limit];
+       @order = @values;
+}

 
 @order = sort { $b <=> $a } @order unless tied @order;
 my $maxval = $opt{maxval} // (
 
 @order = sort { $b <=> $a } @order unless tied @order;
 my $maxval = $opt{maxval} // (

-       $opt{hidemax} ? max grep { length } @values[0 .. $opt{hidemax} - 1] :
+       $opt{hidemax} ? max grep { length } @values[$nr .. $limit] :

        $order[0]
 ) // 0;
 my $minval = $opt{minval} // min $order[-1] // (), 0;
        $order[0]
 ) // 0;
 my $minval = $opt{minval} // min $order[-1] // (), 0;

+my $range = $maxval - $minval;
+$range &&= log $range if $opt{log};

 my $lenval = $opt{'value-length'} // max map { length } @order;
 my $len    = defined $opt{trim} && $opt{trim} <= 0 ? -$opt{trim} + 1 :
 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 $lines[$_] }
-               0 .. min $#lines, $opt{hidemax} || ();  # left padding
-my $size   = ($maxval - $minval) &&
-       ($opt{width} - $lenval - $len) / ($maxval - $minval);  # bar multiplication
+       max(map { length $values[$_] && length $lines[$_] } $nr .. $limit)
+       // 0;  # left padding
+my $size   = defined $opt{width} && $range &&
+       ($opt{width} - $lenval - $len - !!$opt{indicators});  # bar multiplication

 
 my @barmark;
 if ($opt{markers} and $size > 0) {
        for my $markspec (split /\h/, $opt{markers}) {
                my ($char, $func) = split //, $markspec, 2;
 
 my @barmark;
 if ($opt{markers} and $size > 0) {
        for my $markspec (split /\h/, $opt{markers}) {
                my ($char, $func) = split //, $markspec, 2;

-               my $pos = eval {
+               my @pos = eval {

                        if ($func eq 'avg') {
                                return sum(@order) / @order;
                        }
                        elsif ($func =~ /\A([0-9.]+)v\z/) {
                        if ($func eq 'avg') {
                                return sum(@order) / @order;
                        }
                        elsif ($func =~ /\A([0-9.]+)v\z/) {

+                               $1 <= 100 or die(
+                                       "Invalid marker $char: percentile $1 out of bounds\n"
+                               );

                                my $index = $#order * $1 / 100;
                                return ($order[$index] + $order[$index + .5]) / 2;
                        }
                                my $index = $#order * $1 / 100;
                                return ($order[$index] + $order[$index + .5]) / 2;
                        }

-                       else {
+                       elsif ($func =~ /\A-?[0-9.]+\z/) {

                                return $func;
                        }
                                return $func;
                        }

-               } - $minval;
-               $pos >= 0 or next;
-               color(36) for $barmark[$pos * $size] = $char;
+                       elsif ($func =~ /\A\/($float)\z/) {
+                               my @range = my $multiple = my $next = $1;
+                               while ($next < $maxval) {
+                                       $multiple *= 10 if $opt{log};
+                                       push @range, $next += $multiple;
+                               }
+                               return @range;
+                       }
+                       else {
+                               die "Unknown marker $char: $func\n";
+                       }
+               };
+               @pos or do {
+                       warn $@ if $@;
+                       next;
+               };
+               for my $pos (@pos) {
+                       $pos -= $minval;
+                       $pos &&= log $pos if $opt{log};
+                       $pos >= 0 or next;
+                       color(36) for $barmark[$pos / $range * $size] = $char;
+               }

        }
 
        state $lastmax = $maxval;
        if ($maxval > $lastmax) {
                print ' ' x ($lenval + $len);
        }
 
        state $lastmax = $maxval;
        if ($maxval > $lastmax) {
                print ' ' x ($lenval + $len);

-               printf color(90);
+               print color(90);

                printf '%-*s',
                printf '%-*s',

-                       ($lastmax - $minval) * $size + .5,
-                       '-' x (($values[$nr - 1] - $minval) * $size);
+                       ($lastmax - $minval) * $size / $range + .5,
+                       '-' x (($values[$nr - 1] - $minval) * $size / $range);

                print color(92);
                print color(92);

-               say '+' x (($maxval - $lastmax - $minval) * $size + .5);
+               say '+' x (($range - $lastmax) * $size / $range + .5);

                print color(0);
                $lastmax = $maxval;
        }
 }
 
                print color(0);
                $lastmax = $maxval;
        }
 }
 

-@lines > $nr or return if $opt{hidemin};
-
-sub sival {
-       my $unit = int(log(abs $_[0] || 1) / log(10) - 3*($_[0] < 1) + 1e-15);
-       my $float = $_[0] !~ /^0*[-0-9]{1,3}$/;
-       sprintf('%3.*f%1s',
-               $float && ($unit % 3) == ($unit < 0),  # tenths
-               $_[0] / 1000 ** int($unit/3),   # number
-               $#{$opt{units}} * 1.5 < abs $unit ? "e$unit" : $opt{units}->[$unit/3]
-       );
-}
-

 say(
        color(31), sprintf('%*s', $lenval, $minval),
        color(90), '-', color(36), '+',
 say(
        color(31), sprintf('%*s', $lenval, $minval),
        color(90), '-', color(36), '+',

-       color(32), sprintf('%*s', $size * ($maxval - $minval) - 3, $maxval),
+       color(32), sprintf('%*s', $size - 3, $maxval),

        color(90), '-', color(36), '+',
        color(0),
 ) if $opt{header};
 
        color(90), '-', color(36), '+',
        color(0),
 ) if $opt{header};
 

-while ($nr <= $#lines) {
-       $nr >= $opt{hidemax} and last if defined $opt{hidemax};
+while ($nr <= $limit) {

        my $val = $values[$nr];
        my $val = $values[$nr];

-       my $rel = length $val && ($val - $minval) / ($maxval - $minval);
+       my $rel;
+       if (length $val) {
+               $rel = $val - $minval;
+               $rel &&= log $rel if $opt{log};
+               $rel = min(1, $rel / $range) if $range; # 0..1
+       }

        my $color = !length $val || !$opt{palette} ? undef :
                $val == $order[0] ? $opt{palette}->[-1] : # max
                $val == $order[-1] ? $opt{palette}->[0] : # min
                $opt{palette}->[ $rel * ($#{$opt{palette}} - 1) + 1 ];
        my $color = !length $val || !$opt{palette} ? undef :
                $val == $order[0] ? $opt{palette}->[-1] : # max
                $val == $order[-1] ? $opt{palette}->[0] : # min
                $opt{palette}->[ $rel * ($#{$opt{palette}} - 1) + 1 ];

+       my $indicator = $opt{indicators} && $opt{indicators}->[
+               !length($val) || !$#{$opt{indicators}} ? 0 : # blank
+               $#{$opt{indicators}} < 2 ? 1 :
+               $val >= $order[0] ? -1 :
+               $rel * ($#{$opt{indicators}} - 1e-14) + 1
+       ];

 
        if ($opt{spark}) {
                say '' if $opt{width} and $nr and $nr % $opt{width} == 0;
 
        if ($opt{spark}) {
                say '' if $opt{width} and $nr and $nr % $opt{width} == 0;

-               print color($color), $opt{spark}->[
-                       !$val ? 0 : # blank
-                       $val == $order[0] ? -1 : # max
-                       $val == $order[-1] ? 1 : # min
-                       $#{$opt{spark}} < 3 ? 1 :
-                       $rel * ($#{$opt{spark}} - 3) + 2.5
-               ];
+               print color($color), $_ for $indicator;

                next;
        }
                next;
        }

+       print $indicator if defined $indicator;

 
        if (length $val) {
 
        if (length $val) {

-               $val = $opt{units} ? sival($val) : sprintf "%*s", $lenval, $val;
+               $val = sprintf("%*s", $lenval,
+                       $opt{reformat} ? $opt{'value-format'}->($val) : $val
+               );

                color($color) for $val;
        }
        my $line = $lines[$nr] =~ s/\n/$val/r;
                color($color) for $val;
        }
        my $line = $lines[$nr] =~ s/\n/$val/r;

+       if (not length $val) {
+               say $line;
+               next;
+       }

        printf '%-*s', $len + length($val), $line;
        printf '%-*s', $len + length($val), $line;

-       print $barmark[$_] // $opt{'graph-format'}
-               for 1 .. $size && (($values[$nr] || 0) - $minval) * $size + .5;
+       if ($rel and $size) {
+               print $barmark[$_] // $opt{'graph-format'}
+                       for 1 .. $rel * $size + .5;
+       }

        say '';
 }
 continue {
        $nr++;
 }
 say $opt{palette} ? color(0) : '' if $opt{spark};
        say '';
 }
 continue {
        $nr++;
 }
 say $opt{palette} ? color(0) : '' if $opt{spark};

+%uniq = () if $opt{interval} and $opt{count};

 
 

+       return $nr;

 }
 
 sub show_stat {
 }
 
 sub show_stat {

-       if ($opt{hidemin} or $opt{hidemax}) {
-               $opt{hidemin} ||= 1;
-               $opt{hidemax} ||= @lines;
-               printf '%s of ', sum(grep {length} @values[$opt{hidemin} - 1 .. $opt{hidemax} - 1]) // 0;
-       }
+       my %vars = (
+               count => int @order,
+               lines => int @lines,
+       );
+       my $linemin = !$opt{hidemin} ? 0 :
+               ($vars{start} = $opt{hidemin}->($#lines));
+       my $linemax = !$opt{hidemax} ? $#lines :
+               ($vars{end} = $opt{hidemax}->($#lines, $vars{start}));

        if (@order) {
        if (@order) {

-               my $total = sum @order;
-               printf '%s total', color(1) . sprintf('%.8g', $total) . color(0);
-               printf ' in %d values', scalar @order;
-               printf ' over %d lines', scalar @lines if @order != @lines;
-               printf(' (%s min, %s avg, %s max)',
-                       color(31) . $order[-1] . color(0),
-                       color(36) . (sprintf '%*.*f', 0, 2, $total / @order) . color(0),
-                       color(32) . $order[0] . color(0),
+               $vars{partsum} = sum(0, grep {length} @values[$linemin .. $linemax])
+                       if $linemin <= $linemax and ($opt{hidemin} or $opt{hidemax});
+               %vars = (%vars,
+                       sum => sum(@order),
+                       min => $order[-1],
+                       max => $order[0],

                );
                );

+               $vars{avg} = $vars{sum} / @order;

        }
        }

-       say '';
+       say varfmt($opt{report}, \%vars);
+       return 1;
+}
+
+sub varfmt {
+       my ($fmt, $vars) = @_;
+       $fmt =~ s[\$\{ \h*+ ((?: [^{}]++ | \{(?1)\} )+) \}]{
+               my ($name, $op, $cmd) = split /\s*([;:])/, $1, 2;
+               my $format = $name =~ s/\+// || $name !~ s/\#// && $opt{reformat};
+               local $_ = $vars->{$name};
+               defined && do {
+                       $_ = $opt{'value-format'}->($_) if $format;
+                       if ($cmd and $op eq ':') {
+                               $_ = varfmt($cmd, $vars);
+                       }
+                       elsif ($cmd) {
+                               eval $cmd;
+                               warn "Error in \$$name report: $@" if $@;
+                       }
+                       $_;
+               }
+       }eg;
+       return $fmt;

 }
 
 sub show_exit {
 }
 
 sub show_exit {


@@ -310,15 +454,53 @@ sub show_exit {
 show_exit();
 
 __END__
 show_exit();
 
 __END__

+Usage:                                               /\_/\
+  barcat [OPTIONS] [FILES|NUMBERS]                  (=•.•=)
+                                                    (u   u)
+Options:
+  -a, --[no-]ascii         Restrict user interface to ASCII characters
+  -C, --[no-]color         Force colored output of values and bar markers
+  -c, --count              Omit repetitions and count the number of
+                           occurrences
+  -f, --field=([+]N|REGEXP)
+                           Compare values after a given number of whitespace
+                           separators
+      --header             Prepend a chart axis with minimum and maximum
+                           values labeled
+  -H, --human-readable     Format values using SI unit prefixes
+      --sexagesimal        Convert seconds to HH:MM:SS time format
+  -t, --interval[=(N|-LINES)]
+                           Output partial progress every given number of
+                           seconds or input lines
+  -l, --length=[-]SIZE[%]  Trim line contents (between number and bars)
+  -L, --limit=[N|[-]START(-[END]|+N)]
+                           Select a range of lines to display
+  -e, --log                Logarithmic (exponential) scale instead of linear
+      --graph-format=CHAR  Glyph to repeat for the graph line
+  -m, --markers=FORMAT     Statistical positions to indicate on bars
+      --min=N, --max=N     Bars extend from 0 or the minimum value if lower
+      --palette=(PRESET|COLORS)
+                           Override colors of parsed numbers
+  -_, --spark              Replace lines by sparklines
+      --indicators[=CHARS] Prefix a unicode character corresponding to each
+                           value
+  -s, --stat               Total statistics after all data
+  -u, --unmodified         Do not reformat values, keeping leading whitespace
+      --value-length=SIZE  Reserved space for numbers
+  -w, --width=COLUMNS      Override the maximum number of columns to use
+  -h, --usage              Overview of available options
+      --help               Full pod documentation
+  -V, --version            Version information
+

 =encoding utf8
 
 =head1 NAME
 
 =encoding utf8
 
 =head1 NAME
 

-barcat - graph to visualize input values
+barcat - concatenate texts with graph to visualize values

 
 =head1 SYNOPSIS
 
 
 =head1 SYNOPSIS
 

-B<barcat> [<options>] [<file>... | <numbers>]
+B<barcat> [I<options>] [I<file>... | I<numbers>]

 
 =head1 DESCRIPTION
 
 
 =head1 DESCRIPTION
 


@@ -327,7 +509,6 @@ Visualizes relative sizes of values read from input
 Contents are concatenated similar to I<cat>,
 but numbers are reformatted and a bar graph is appended to each line.
 
 Contents are concatenated similar to I<cat>,
 but numbers are reformatted and a bar graph is appended to each line.
 

-Don't worry, barcat does not drink and divide.

 It can has various options for input and output (re)formatting,
 but remains limited to one-dimensional charts.
 For more complex graphing needs
 It can has various options for input and output (re)formatting,
 but remains limited to one-dimensional charts.
 For more complex graphing needs


@@ -337,148 +518,226 @@ you'll need a larger animal like I<gnuplot>.
 
 =over
 
 
 =over
 

-=item -c, --[no-]color
+=item B<-a>, B<-->[B<no->]B<ascii>
+
+Restrict user interface to ASCII characters,
+replacing default UTF-8 by their closest approximation.
+Input is always interpreted as UTF-8 and shown as is.
+
+=item B<-C>, B<-->[B<no->]B<color>

 
 Force colored output of values and bar markers.
 Defaults on if output is a tty,
 disabled otherwise such as when piped or redirected.
 
 Force colored output of values and bar markers.
 Defaults on if output is a tty,
 disabled otherwise such as when piped or redirected.

+Can also be disabled by setting B<-M>
+or the I<NO_COLOR> environment variable.

 
 

-=item -f, --field=(<number>|<regexp>)
+=item B<-c>, B<--count>
+
+Omit repetitions and count the number of occurrences.
+Similar to piping input through C<sort | uniq -c>
+but keeping the order of first appearances.
+
+Lines are omitted if they (or a specified field) are identical,
+and the amount of matches is prepended and used as values
+for bars and subsequent statistics.
+
+=item B<-f>, B<--field>=([B<+>]I<number> | I<regexp>)

 
 Compare values after a given number of whitespace separators,
 or matching a regular expression.
 
 
 Compare values after a given number of whitespace separators,
 or matching a regular expression.
 

-Unspecified or I<-f0> means values are at the start of each line.
-With I<-f1> the second word is taken instead.
+Unspecified or B<-f0> means values are at the start of each line.
+With B<-f1> the second word is taken instead.

 A string can indicate the starting position of a value
 A string can indicate the starting position of a value

-(such as I<-f:> if preceded by colons),
+(such as B<-f:> if preceded by colons),

 or capture the numbers itself,
 or capture the numbers itself,

-for example I<-f'(\d+)'> for the first digits anywhere.
+for example B<-f'(\d+)'> for the first digits anywhere.
+A shorthand for this is C<+0>, or C<+N> to find the Nth number.

 
 

-=item --header
+=item B<--header>

 
 Prepend a chart axis with minimum and maximum values labeled.
 
 
 Prepend a chart axis with minimum and maximum values labeled.
 

-=item -H, --human-readable
+=item B<-H>, B<--human-readable>

 
 Format values using SI unit prefixes,
 
 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>.
+turning long numbers like C<12356789> into C<12.4M>.
+Also changes an exponent C<1.602176634e-19> to C<160.2z>.

 Short integers are aligned but kept without decimal point.
 
 Short integers are aligned but kept without decimal point.
 

-=item -t, --interval[=(<seconds>|-<lines>)]
+=item B<--sexagesimal>
+
+Convert seconds to HH:MM:SS time format.
+
+=item B<-t>, B<--interval>[=(I<seconds> | B<->I<lines>)]

 
 Output partial progress every given number of seconds or input lines.
 An update can also be forced by sending a I<SIGALRM> alarm signal.
 
 
 Output partial progress every given number of seconds or input lines.
 An update can also be forced by sending a I<SIGALRM> alarm signal.
 

-=item -l, --length=[-]<size>[%]
+=item B<-l>, B<--length>=[B<->]I<size>[B<%>]

 
 Trim line contents (between number and bars)
 to a maximum number of characters.
 The exceeding part is replaced by an abbreviation sign,
 
 Trim line contents (between number and bars)
 to a maximum number of characters.
 The exceeding part is replaced by an abbreviation sign,

-unless C<--length=0>.
+unless B<--length=0>.

 
 Prepend a dash (i.e. make negative) to enforce padding
 regardless of encountered contents.
 
 
 Prepend a dash (i.e. make negative) to enforce padding
 regardless of encountered contents.
 

-=item -L, --limit[=(<count> | <start>-[<end>])]
+=item B<-L>, B<--limit>=[I<count> | [B<->]I<start>(B<->[I<end>] | B<+>I<count>)]
+
+Select a range of lines to display.
+A single integer indicates the last line number (like I<head>),
+or first line counting from the bottom if negative (like I<tail>).
+
+A range consists of a starting line number followed by either
+a dash C<-> to an optional end, or plus sign C<+> with count.

 
 

-Stop output after a number of lines.
-All input is still counted and analyzed for statistics,
+All hidden input is still counted and analyzed for statistics,

 but disregarded for padding and bar size.
 
 but disregarded for padding and bar size.
 

-=item --graph-format=<character>
+=item B<-e>, B<--log>
+
+Logarithmic (B<e>xponential) scale instead of linear
+to compare orders of magnitude.
+
+=item B<--graph-format>=I<character>

 
 Glyph to repeat for the graph line.
 Defaults to a dash C<->.
 
 
 Glyph to repeat for the graph line.
 Defaults to a dash C<->.
 

-=item -m, --markers=<format>
+=item B<-m>, B<--markers>=I<format>

 
 Statistical positions to indicate on bars.
 A single indicator glyph precedes each position:
 
 =over 2
 
 
 Statistical positions to indicate on bars.
 A single indicator glyph precedes each position:
 
 =over 2
 

-=item <number>
+=item I<number>

 
 Exact value to match on the axis.
 
 Exact value to match on the axis.

-A vertical bar at the zero crossing is displayed by I<|0>
+A vertical bar at the zero crossing is displayed by C<|0>

 for negative values.
 for negative values.

-For example I<:3.14> would show a colon at pi.
+For example C<π3.14> would locate pi.
+
+=item B</>I<interval>

 
 

-=item <percentage>I<v>
+Repeated at every multiple of a number.
+For example C<:/1> for a grid at every integer.
+
+=item I<percentage>B<v>

 
 Ranked value at the given percentile.
 
 Ranked value at the given percentile.

-The default shows I<+> at I<50v> for the mean or median;
+The default shows C<+> at C<50v> for the mean or median;

 the middle value or average between middle values.
 the middle value or average between middle values.

-One standard deviation right of the mean is at about I<68.3v>.
-The default includes I<< >31.73v <68.27v >>
-to encompass all I<normal> results, or 68% of all entries, by B<< <--> >>.
+One standard deviation right of the mean is at about C<68.3v>.
+The default includes C<< >31.73v <68.27v >>
+to encompass all I<normal> results, or 68% of all entries, by I<< <--> >>.

 
 

-=item I<avg>
+=item B<avg>

 
 Matches the average;
 the sum of all values divided by the number of counted lines.
 
 Matches the average;
 the sum of all values divided by the number of counted lines.

-Indicated by default as I<=>.
+Indicated by default as C<=>.

 
 =back
 
 
 =back
 

-=item --min=<number>, --max=<number>
+=item B<--min>=I<number>, B<--max>=I<number>

 
 Bars extend from 0 or the minimum value if lower,
 to the largest value encountered.
 These options can be set to customize this range.
 
 
 Bars extend from 0 or the minimum value if lower,
 to the largest value encountered.
 These options can be set to customize this range.
 

-=item --palette=(<preset> | <color>...)
+=item B<--palette>=(I<preset> | I<color>...)

 
 Override colors of parsed numbers.
 
 Override colors of parsed numbers.

-Can be any CSI escape, such as I<90> for default dark grey,
-or alternatively I<1;30> for bold black.
+Can be any CSI escape, such as C<90> for default dark gray,
+or alternatively C<1;30> for bright black.

 
 In case of additional colors,
 the last is used for values equal to the maximum, the first for minima.
 
 In case of additional colors,
 the last is used for values equal to the maximum, the first for minima.

-If unspecified, these are green and red respectively (I<31 90 32>).
+If unspecified, these are green and red respectively (C<31 90 32>).
+Multiple intermediate colors will be distributed
+relative to the size of values.
+
+A non-numeric name can refer to a predefined color scheme:
+
+=over 8

 
 

-=item --spark[=<glyphs>]
+=item B<whites>
+
+Minimal set of monochrome brightnesses.
+
+=item B<grays>
+
+Utilize the 24 grayscale ramp in 256-color terminals.
+
+=item B<fire>
+
+Gradient red to white in 7 out of 16 colors.
+
+=item B<fire256>
+
+Extended to 17 colors out of 256.
+
+=item B<rainbow>
+
+Saturated red to green to blue to red.
+
+=item B<random>
+
+All 215 extended colors in unrelated orders.
+
+=back
+
+=item B<-_>, B<--spark>

 
 Replace lines by I<sparklines>,
 
 Replace lines by I<sparklines>,

-single characters corresponding to input values.
-A specified sequence of unicode characters will be used for
-Of a specified sequence of unicode characters,
-the first one will be used for non-values,
-the last one for the maximum,
-the second (if any) for the minimum,
-and any remaining will be distributed over the range of values.
+single characters (configured by B<--indicators>)
+corresponding to input values.
+
+=item B<--indicators>[=I<characters>]
+
+Prefix a unicode character corresponding to each value.
+The first specified character will be used for non-values,
+the remaining sequence will be distributed over the range of values.

 Unspecified, block fill glyphs U+2581-2588 will be used.
 
 Unspecified, block fill glyphs U+2581-2588 will be used.
 

-=item -s, --stat
+=item B<-s>, B<--stat>

 
 Total statistics after all data.
 
 
 Total statistics after all data.
 

-=item -u, --unmodified
+While processing (possibly a neverending pipe),
+intermediate results are also shown on signal I<SIGINFO> if available (control+t on BSDs)
+or I<SIGQUIT> otherwise (ctrl+\ on linux).
+
+=item B<-u>, B<--unmodified>

 
 Do not reformat values, keeping leading whitespace.
 Keep original value alignment, which may be significant in some programs.
 
 
 Do not reformat values, keeping leading whitespace.
 Keep original value alignment, which may be significant in some programs.
 

-=item --value-length=<size>
+=item B<--value-length>=I<size>

 
 Reserved space for numbers.
 
 
 Reserved space for numbers.
 

-=item -w, --width=<columns>
+=item B<-w>, B<--width>=I<columns>

 
 Override the maximum number of columns to use.
 
 Override the maximum number of columns to use.

-Appended graphics will extend to fill up the entire screen.
+Appended graphics will extend to fill up the entire screen,
+otherwise determined by the environment variable I<COLUMNS>
+or by running the I<tput> command.

 
 

-=item -h, --usage
+=item B<-h>, B<--usage>

 
 Overview of available options.
 
 
 Overview of available options.
 

-=item --help
+=item B<--help>

 
 

-Full documentation
-rendered by perldoc.
+Full pod documentation
+as rendered by perldoc.

 
 

-=item --version
+=item B<-V>, B<--version>

 
 Version information.
 
 
 Version information.
 


@@ -494,62 +753,89 @@ Compare file sizes (with human-readable numbers):
 
     du -d0 -b * | barcat -H
 
 
     du -d0 -b * | barcat -H
 

+Same from formatted results, selecting the first numeric value:
+
+    tree -s --noreport | barcat -H -f+
+
+Compare media metadata, like image size or play time:
+
+    exiftool -T -p '$megapixels ($imagesize) $filename' * | barcat
+
+    exiftool -T -p '$duration# $avgbitrate# $filename' * | barcat --sexagesimal
+
+    find -type f -print0 | xargs -0 -L1 \
+    ffprobe -show_format -of json -v error |
+    jq -r '.format|.duration+" "+.bit_rate+" "+.filename' | barcat --sex
+

 Memory usage of user processes with long names truncated:
 
 Memory usage of user processes with long names truncated:
 

-    ps xo %mem,pid,cmd | barcat -l40
+    ps xo rss,pid,cmd | barcat -l40

 
 Monitor network latency from prefixed results:
 
     ping google.com | barcat -f'time=\K' -t
 
 
 Monitor network latency from prefixed results:
 
     ping google.com | barcat -f'time=\K' -t
 

-Commonly used after counting, for example users on the current server:
-
-    users | tr ' ' '\n' | sort | uniq -c | barcat
-
-Letter frequencies in text files:
+Commonly used after counting, eg letter frequencies in text files:

 
     cat /usr/share/games/fortunes/*.u8 |
     perl -CS -nE 'say for grep length, split /\PL*/, uc' |
     sort | uniq -c | barcat
 
 
     cat /usr/share/games/fortunes/*.u8 |
     perl -CS -nE 'say for grep length, split /\PL*/, uc' |
     sort | uniq -c | barcat
 

+Users on the current server while preserving order:
+
+    users | tr ' ' '\n' | barcat -c
+

 Number of HTTP requests per day:
 
 Number of HTTP requests per day:
 

-    cat log/access.log | cut -d\  -f4 | cut -d: -f1 | uniq -c | barcat
+    barcat -cf'\[([^:]+)' httpd/access.log

 
 

-Any kind of database query with counts, preserving returned alignment:
+Any kind of database query results, preserving returned alignment:

 
 

-    echo 'SELECT count(*),schemaname FROM pg_tables GROUP BY 2' |
+    echo 'SELECT sin(value * .1) FROM generate_series(0, 30) value' |

     psql -t | barcat -u
 
     psql -t | barcat -u
 

+In PostgreSQL from within the client; a fancy C<\dt+> perhaps:
+
+    > SELECT schemaname, relname, pg_total_relation_size(relid)
+      FROM pg_statio_user_tables ORDER BY idx_blks_hit
+      \g |barcat -uHf+
+
+Same thing in SQLite (requires the sqlite3 client):
+
+    > .once |barcat -Hf+
+    > SELECT name, sum(pgsize) FROM dbstat GROUP BY 1;
+

 Earthquakes worldwide magnitude 1+ in the last 24 hours:
 
 Earthquakes worldwide magnitude 1+ in the last 24 hours:
 

-    https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/1.0_day.csv |
-    column -tns, | graph -f4 -u -l80%
+    curl https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/1.0_day.csv |
+    column -ts, -n | barcat -f4 -u -l80%

 
 External datasets, like movies per year:
 
 
 External datasets, like movies per year:
 

-    curl https://github.com/prust/wikipedia-movie-data/raw/master/movies.json |
-    perl -054 -nlE 'say if s/^"year"://' | uniq -c | barcat
-
-But please get I<jq> to process JSON
-and replace the manual selection by C<< jq '.[].year' >>.
+    curl https://github.com/prust/wikipedia-movie-data/raw/master/movies.json -L |
+    jq .[].year | uniq -c | barcat

 
 Pokémon height comparison:
 
 
 Pokémon height comparison:
 

-    curl https://github.com/Biuni/PokemonGO-Pokedex/raw/master/pokedex.json |
+    curl https://github.com/Biuni/PokemonGO-Pokedex/raw/master/pokedex.json -L |

     jq -r '.pokemon[] | [.height,.num,.name] | join(" ")' | barcat
 
 USD/EUR exchange rate from CSV provided by the ECB:
 
     curl https://sdw.ecb.europa.eu/export.do \
          -Gd 'node=SEARCHRESULTS&q=EXR.D.USD.EUR.SP00.A&exportType=csv' |
     jq -r '.pokemon[] | [.height,.num,.name] | join(" ")' | barcat
 
 USD/EUR exchange rate from CSV provided by the ECB:
 
     curl https://sdw.ecb.europa.eu/export.do \
          -Gd 'node=SEARCHRESULTS&q=EXR.D.USD.EUR.SP00.A&exportType=csv' |

-    grep '^[12]' | barcat -f',\K' --value-length=7
+    barcat -f',\K' --value-length=7

 
 Total population history in XML from the World Bank:
 
     curl http://api.worldbank.org/v2/country/1W/indicator/SP.POP.TOTL |
 
 Total population history in XML from the World Bank:
 
     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 -H
+    xmlstarlet sel -t -m '*/*' -v wb:date -o ' ' -v wb:value -n |
+    barcat -f1 -H --markers=+/1e9
+
+Population and other information for all countries:
+
+    curl http://download.geonames.org/export/dump/countryInfo.txt |
+    grep -v '^#\s' | column -ts$'\t' -n | barcat -f+2 -e -u -l150 -s

 
 And of course various Git statistics, such commit count by year:
 
 
 And of course various Git statistics, such commit count by year:
 


@@ -559,11 +845,19 @@ Or the top 3 most frequent authors with statistics over all:
 
     git shortlog -sn | barcat -L3 -s
 
 
     git shortlog -sn | barcat -L3 -s
 

-Activity of the last days (substitute date C<-v-{}d> on BSD):
+Activity graph of the last days (substitute date C<-v-{}d> on BSD):

 
     ( git log --pretty=%ci --since=30day | cut -b-10
       seq 0 30 | xargs -i date +%F -d-{}day ) |
 
     ( git log --pretty=%ci --since=30day | cut -b-10
       seq 0 30 | xargs -i date +%F -d-{}day ) |

-    sort | uniq -c | awk '$1--' | graph --spark
+    sort | uniq -c | awk '$1--' | barcat --spark
+
+Sparkline graphics of simple input given as inline parameters:
+
+    barcat -_ 3 1 4 1 5 0 9 2 4
+
+Misusing the spark functionality to draw a lolcat line:
+
+    seq $(tput cols) | barcat --spark --indicator=- --palette=rainbow

 
 =head1 AUTHOR
 
 
 =head1 AUTHOR