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gecko/gfx/thebes/genUnicodeScriptData.pl

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Perl
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#!/usr/bin/env perl
# ***** BEGIN LICENSE BLOCK *****
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
#
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
#
# The Original Code is Mozilla Foundation code.
#
# The Initial Developer of the Original Code is Mozilla Foundation.
# Portions created by the Initial Developer are Copyright (C) 2009-2010
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
# Jonathan Kew <jfkthame@gmail.com>
#
# Alternatively, the contents of this file may be used under the terms of
# either the GNU General Public License Version 2 or later (the "GPL"), or
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
#
# ***** END LICENSE BLOCK *****
# This tool is used to prepare lookup tables of Unicode character properties
# needed by gfx code to support text shaping operations. The properties are
# read from the Unicode Character Database and compiled into multi-level arrays
# for efficient lookup.
#
# To regenerate the tables in gfxUnicodePropertyData.cpp:
#
# (1) Download the current Unicode data files from
#
# http://www.unicode.org/Public/UNIDATA/
#
# NB: not all the files are actually needed; currently, we require
# - UnicodeData.txt
# - Scripts.txt
# - EastAsianWidth.txt
# - BidiMirroring.txt
# though this may change if we find a need for additional properties.
#
# The Unicode data files should be together in a single directory.
#
# (2) Run this tool using a command line of the form
#
# perl genUnicodeScriptData.pl \
# /path/to/hb-unicode.h \
# /path/to/UCD-directory \
# > gfxUnicodePropertyData.cpp
#
# (where hb-unicode.h is found in the gfx/harfbuzz/src directory).
use strict;
# load HB_Script and HB_Category constants
my $sc = -1;
my $cc = -1;
my %scriptCode;
my %catCode;
open FH, "< $ARGV[0]" or die "can't open $ARGV[0] (header file hb-unicode.h)\n";
while (<FH>) {
if (m/HB_SCRIPT_([A-Z_]+)\s*=\s*(\d+)\s*,/) {
$sc = $2;
$scriptCode{$1} = $sc;
} elsif (m/HB_SCRIPT_([A-Z_]+)/) {
$sc++;
$scriptCode{$1} = $sc;
}
if (m/HB_CATEGORY_([A-Z_]+)/) {
$cc++;
$catCode{$1} = $cc;
}
}
close FH;
# initialize default properties
my @script;
my @category;
my @combining;
my @eaw;
my @mirror;
for (my $i = 0; $i < 0x110000; ++$i) {
$script[$i] = $scriptCode{"UNKNOWN"};
$category[$i] = $catCode{"UNASSIGNED"};
$combining[$i] = 0;
}
my %ucd2hb = (
'Cc' => 'CONTROL',
'Cf' => 'FORMAT',
'Cn' => 'UNASSIGNED',
'Co' => 'PRIVATE_USE',
'Cs' => 'SURROGATE',
'Ll' => 'LOWERCASE_LETTER',
'Lm' => 'MODIFIER_LETTER',
'Lo' => 'OTHER_LETTER',
'Lt' => 'TITLECASE_LETTER',
'Lu' => 'UPPERCASE_LETTER',
'Mc' => 'COMBINING_MARK',
'Me' => 'ENCLOSING_MARK',
'Mn' => 'NON_SPACING_MARK',
'Nd' => 'DECIMAL_NUMBER',
'Nl' => 'LETTER_NUMBER',
'No' => 'OTHER_NUMBER',
'Pc' => 'CONNECT_PUNCTUATION',
'Pd' => 'DASH_PUNCTUATION',
'Pe' => 'CLOSE_PUNCTUATION',
'Pf' => 'FINAL_PUNCTUATION',
'Pi' => 'INITIAL_PUNCTUATION',
'Po' => 'OTHER_PUNCTUATION',
'Ps' => 'OPEN_PUNCTUATION',
'Sc' => 'CURRENCY_SYMBOL',
'Sk' => 'MODIFIER_SYMBOL',
'Sm' => 'MATH_SYMBOL',
'So' => 'OTHER_SYMBOL',
'Zl' => 'LINE_SEPARATOR',
'Zp' => 'PARAGRAPH_SEPARATOR',
'Zs' => 'SPACE_SEPARATOR'
);
# read UnicodeData.txt
open FH, "< $ARGV[1]/UnicodeData.txt" or die "can't open UCD file UnicodeData.txt\n";
while (<FH>) {
my @fields = split /;/;
if ($fields[1] =~ /First/) {
my $first = hex "0x$fields[0]";
$_ = <FH>;
@fields = split /;/;
if ($fields[1] =~ /Last/) {
my $last = hex "0x$fields[0]";
do {
$category[$first] = $catCode{$ucd2hb{$fields[2]}};
$combining[$first] = $fields[3];
$first++;
} while ($first <= $last);
} else {
die "didn't find Last code for range!\n";
}
} else {
my $usv = hex "0x$fields[0]";
$category[$usv] = $catCode{$ucd2hb{$fields[2]}};
$combining[$usv] = $fields[3];
}
}
close FH;
# read Scripts.txt
my %scriptAliases = (
'MEETEI_MAYEK' => 'MEITEI_MAYEK'
);
open FH, "< $ARGV[1]/Scripts.txt" or die "can't open UCD file Scripts.txt\n";
while (<FH>) {
if (m/([0-9A-F]{4,6})(?:\.\.([0-9A-F]{4,6}))*\s+;\s+([^ ]+)/) {
my $script = uc($3);
$script = $scriptAliases{$script} if exists $scriptAliases{$script};
warn "unknown script $script" unless exists $scriptCode{$script};
$script = $scriptCode{$script};
my $start = hex "0x$1";
my $end = (defined $2) ? hex "0x$2" : $start;
for (my $i = $start; $i <= $end; ++$i) {
$script[$i] = $script;
}
}
}
close FH;
# read EastAsianWidth.txt
my %eawCode = (
'A' => 0, # ; Ambiguous
'F' => 1, # ; Fullwidth
'H' => 2, # ; Halfwidth
'N' => 3, # ; Neutral
'NA'=> 4, # ; Narrow
'W' => 5 # ; Wide
);
open FH, "< $ARGV[1]/EastAsianWidth.txt" or die "can't open UCD file EastAsianWidth.txt\n";
while (<FH>) {
s/#.*//;
if (m/([0-9A-F]{4,6})(?:\.\.([0-9A-F]{4,6}))*\s*;\s*([^ ]+)/) {
my $eaw = uc($3);
warn "unknown EAW code $eaw" unless exists $eawCode{$eaw};
$eaw = $eawCode{$eaw};
my $start = hex "0x$1";
my $end = (defined $2) ? hex "0x$2" : $start;
for (my $i = $start; $i <= $end; ++$i) {
$eaw[$i] = $eaw;
}
}
}
close FH;
# read BidiMirroring.txt
my @distantMirrors = ();
my $smallMirrorOffset = 64;
open FH, "< $ARGV[1]/BidiMirroring.txt" or die "can't open UCD file BidiMirroring.txt\n";
while (<FH>) {
s/#.*//;
if (m/([0-9A-F]{4,6});\s*([0-9A-F]{4,6})/) {
my $mirrorOffset = hex("0x$2") - hex("0x$1");
if ($mirrorOffset < $smallMirrorOffset && $mirrorOffset >= -128) {
$mirror[hex "0x$1"] = $mirrorOffset;
} else {
die "too many distant mirror codes\n" if scalar @distantMirrors == 128 - $smallMirrorOffset;
$mirror[hex "0x$1"] = $smallMirrorOffset + scalar @distantMirrors;
push @distantMirrors, hex("0x$2");
}
}
}
close FH;
my $timestamp = gmtime();
print <<__END;
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Foundation code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2009-2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Jonathan Kew <jfkthame\@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* Derived from the Unicode Character Database by genUnicodeScriptData.pl
*
* For Unicode terms of use, see http://www.unicode.org/terms_of_use.html
*
* ***** END LICENSE BLOCK ***** */
/*
* Created on $timestamp.
*
* * * * * This file contains MACHINE-GENERATED DATA, do not edit! * * * * *
*/
__END
sub sprintScript
{
my $usv = shift;
return sprintf("%d,", $script[$usv]);
}
&genTables("Script", "PRUint8", 10, 6, \&sprintScript, 1);
sub sprintCC
{
my $usv = shift;
return sprintf("%d,", $combining[$usv]);
}
&genTables("CClass", "PRUint8", 10, 6, \&sprintCC, 1);
print "static const PRInt32 kSmallMirrorOffset = $smallMirrorOffset;\n";
print "static const PRUint16 sDistantMirrors[] = {\n";
for (my $i = 0; $i < scalar @distantMirrors; ++$i) {
printf " 0x%04X", $distantMirrors[$i];
print $i < $#distantMirrors ? ",\n" : "\n";
}
print "};\n\n";
sub sprintMirror
{
my $usv = shift;
return sprintf("%d,", $mirror[$usv]);
}
&genTables("Mirror", "PRInt8", 9, 7, \&sprintMirror, 0);
sub sprintCatEAW
{
my $usv = shift;
return sprintf("{%d,%d},", $eaw[$usv], $category[$usv]);
}
&genTables("CatEAW", "struct {\n unsigned int mEAW:3;\n unsigned int mCategory:5;\n}",
9, 7, \&sprintCatEAW, 1);
sub genTables
{
my ($prefix, $type, $indexBits, $charBits, $func, $smp) = @_;
print "#define k${prefix}IndexBits $indexBits\n";
print "#define k${prefix}CharBits $charBits\n";
my $indexLen = 1 << $indexBits;
my $dataLen = 1 << $charBits;
my %charIndex = ();
my %pageMapIndex = ();
my @pageMap = ();
my @char = ();
my $planeMap = "\x00" x 16;
foreach my $plane (0 .. ($smp ? 16 : 0)) {
my $pageMap = "\x00" x $indexLen * 2;
foreach my $page (0 .. $indexLen - 1) {
my $charValues = "";
foreach my $ch (0 .. $dataLen - 1) {
my $usv = $plane * 0x10000 + $page * $dataLen + $ch;
$charValues .= &$func($usv);
}
chop $charValues;
unless (exists $charIndex{$charValues}) {
$charIndex{$charValues} = scalar keys %charIndex;
$char[$charIndex{$charValues}] = $charValues;
}
substr($pageMap, $page * 2, 2) = pack('S', $charIndex{$charValues});
}
unless (exists $pageMapIndex{$pageMap}) {
$pageMapIndex{$pageMap} = scalar keys %pageMapIndex;
$pageMap[$pageMapIndex{$pageMap}] = $pageMap;
}
if ($plane > 0) {
substr($planeMap, $plane - 1, 1) = pack('C', $pageMapIndex{$pageMap});
}
}
if ($smp) {
print "static const PRUint8 s${prefix}Planes[16] = {";
print join(',', map { sprintf("%d", $_) } unpack('C*', $planeMap));
print "};\n\n";
}
my $chCount = scalar @char;
my $pmBits = $chCount > 255 ? 16 : 8;
my $pmCount = scalar @pageMap;
print "static const PRUint${pmBits} s${prefix}Pages[$pmCount][$indexLen] = {\n";
for (my $i = 0; $i < scalar @pageMap; ++$i) {
print " {";
print join(',', map { sprintf("%d", $_) } unpack('S*', $pageMap[$i]));
print $i < $#pageMap ? "},\n" : "}\n";
}
print "};\n\n";
print "static const $type s${prefix}Values[$chCount][$dataLen] = {\n";
for (my $i = 0; $i < scalar @char; ++$i) {
print " {";
print $char[$i];
print $i < $#char ? "},\n" : "}\n";
}
print "};\n\n";
print STDERR "Data for $prefix = ", $pmCount*$indexLen*$pmBits/8 + $chCount*$dataLen + 16, "\n";
}
print <<__END;
/*
* * * * * This file contains MACHINE-GENERATED DATA, do not edit! * * * * *
*/
__END
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