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#!/usr/bin/perl -w
# $Id: unicover.pl 2040 2007-10-28 20:38:57Z ben_laenen $
# unicode coverage analyzator
# (c)2004,2005 Stepan Roh (PUBLIC DOMAIN)
# usage: ./unicover.pl unicode_data_file blocks_file sfd_file1 label1 (sfd_file2 label2...)
# unicode data file can be downloaded from http://www.unicode.org/Public/UNIDATA/UnicodeData.txt
# blocks file can be downloaded from http://www.unicode.org/Public/UNIDATA/Blocks.txt
sub parse_blocks_file($);
sub parse_unicode_data_file($);
sub parse_sfd_file($);
sub inc_coverage($$);
sub print_coverage();
sub disable_char($);
$debug = 0;
if ($debug) {
use Data::Dumper;
$Data::Dumper::Indent = 1;
$Data::Dumper::Sortkeys = 1;
$Data::Dumper::Purity = 1;
}
# map (start dec => ( 'name' => block name, 'end' => end dec, 'coverage' => ( sfd_file => coverage ), 'disabled_count' => number of disabled glyphs )
%blocks = ();
%chars = ();
sub parse_blocks_file($) {
my ($blocks_file) = @_;
open (F, $blocks_file) || die "Unable to open $blocks_file : $!\n";
while (<F>) {
next if (/^\s*(#|$)/);
my ($start, $end, $name) = ($_ =~ /^(.*?)\.\.(.*?);\s*(.*?)\s*$/);
$start = hex ($start);
$end = hex ($end);
$blocks{$start}{'name'} = $name;
$blocks{$start}{'end'} = $end;
}
close (F);
}
sub disable_char($) {
my ($dec_enc) = @_;
foreach $block_start (keys %blocks) {
my ($block_end) = $blocks{$block_start}{'end'};
if (($dec_enc >= $block_start) && ($dec_enc <= $block_end)) {
$blocks{$block_start}{'disabled_count'}++;
last;
}
}
}
sub disable_char_range($$) {
my ($range_start, $range_end) = @_;
my $cur_enc = $range_start;
while ($cur_enc <= $range_end) {
my $cur_block_start = -1;
foreach $block_start (keys %blocks) {
my ($block_end) = $blocks{$block_start}{'end'};
if (($cur_enc >= $block_start) && ($cur_enc <= $block_end)) {
$cur_block_start = $block_start;
last;
}
}
return if ($cur_block_start == -1);
while (($cur_enc <= $range_end) && ($cur_enc <= $blocks{$cur_block_start}{'end'})) {
$blocks{$cur_block_start}{'disabled_count'}++;
$cur_enc++;
}
}
}
sub parse_unicode_data_file($) {
my ($ud_file) = @_;
open (F, $ud_file) || die "Unable to open $ud_file : $!\n";
my $prev_enc = -1;
while (<F>) {
next if (/^\s*(#|$)/);
my ($enc, $name) = split (/;/);
$enc = hex ($enc);
if ($prev_enc + 1 < $enc) {
disable_char_range ($prev_enc + 1, $enc - 1);
}
disable_char ($enc) if ($name =~ /^</);
$chars{$enc} = 1 if ($name !~ /^</);
$prev_enc = $enc;
}
# find last possible character
$last_enc = $prev_enc;
foreach $block_start (keys %blocks) {
my ($block_end) = $blocks{$block_start}{'end'};
$last_enc = $block_end if ($block_end > $last_enc);
}
if ($prev_enc + 1 <= $last_enc) {
disable_char_range ($prev_enc + 1, $last_enc);
}
close (F);
}
sub inc_coverage($$) {
my ($sfd_file, $dec_enc) = @_;
foreach $block_start (keys %blocks) {
my ($block_end) = $blocks{$block_start}{'end'};
if (($dec_enc >= $block_start) && ($dec_enc <= $block_end)) {
if (exists $chars{$dec_enc}) {
$blocks{$block_start}{'coverage'}{$sfd_file}++;
}
last;
}
}
}
sub parse_sfd_file($) {
my ($sfd_file) = @_;
open (F, $sfd_file) || die "Unable to open $sfd_file : $!\n";
my $curchar = '';
my $curenc = '';
my $empty = 0;
while (<F>) {
if (/^StartChar:\s*(\S+)\s*$/) {
$curchar = $1;
$curenc = '';
$empty = 0;
} elsif (/^Colour:/) {
# XXX this is quick'n'dirty hack to detect non-empty glyphs
$empty = 1;
} elsif (/^Encoding:\s*\d+\s*(\d+)\s*\d+\s*$/) {
$curenc = $1;
} elsif ($curenc && !$empty && /^EndChar\s*/) {
inc_coverage ($sfd_file, $curenc);
}
}
close (F);
}
# TODO: formats would be better
sub print_coverage() {
print <<END;
This is the Unicode coverage file for DejaVu fonts
(\$Id\$)
Control and similar characters are discounted from totals.
END
print " ";
foreach $sfd_file (@sfd_files) {
my $label = $sfd_files{$sfd_file};
printf "%-19s", $label;
}
print "\n";
foreach $block_start (sort { $a <=> $b } keys %blocks) {
my ($block_end) = $blocks{$block_start}{'end'};
my ($name) = $blocks{$block_start}{'name'};
my ($disabled) = $blocks{$block_start}{'disabled_count'};
$disabled = 0 if (!defined $disabled);
my ($length) = $block_end - $block_start + 1 - $disabled;
printf "U+%04x %-40s", $block_start, $name;
foreach $sfd_file (@sfd_files) {
my ($coverage) = $blocks{$block_start}{'coverage'}{$sfd_file};
$coverage = 0 if (!defined $coverage);
my ($percent) = ($length != 0) ? ($coverage/$length * 100) : 0;
if ($percent > 0) {
printf " %3d%%", $percent;
} else {
print " ";
}
printf " %-13s", "($coverage/$length)";
}
print "\n";
}
}
if (@ARGV < 3) {
print STDERR "usage: unicode_data_file blocks_file sfd_file1 label1 (sfd_file2 label2...)\n";
exit 1;
}
$unicode_data_file = shift @ARGV;
$blocks_file = shift @ARGV;
@sfd_files = ();
%sfd_files = ();
while (@ARGV) {
$sfd_file = shift @ARGV;
$label = shift @ARGV;
push (@sfd_files, $sfd_file);
$sfd_files{$sfd_file} = $label;
}
parse_blocks_file($blocks_file);
parse_unicode_data_file($unicode_data_file);
foreach $sfd_file (@sfd_files) {
parse_sfd_file($sfd_file);
}
print_coverage();
if ($debug) {
print STDERR Data::Dumper->Dump([\%blocks], ['*blocks']);
}
1;
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