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gecko-dev/layout/tools/genbidicattable.pl

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#!/usr/local/bin/perl
#
# 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.org code.
#
# The Initial Developer of the Original Code is IBM
# Corporation. Portions created by IBM are
# Copyright (C) 2000 IBM Corporation. All
# Rights Reserved.
#
# Contributor(s):
#
######################################################################
#
# Initial global variable
#
######################################################################
%gcount = ();
%pat = ();
%map = (
"L" => "1", # Left-to-Right
"R" => "2", # Right-to-Left
"AL" => "3", # Right-to-Left Arabic
"AN" => "4", # Arabic Number
"EN" => "5", # European Number
"ES" => "6", # European Number Separator
"ET" => "7", # European Number Terminator
"CS" => "8", # Common Number Separator
"ON" => "9", # Other Neutrals
"NSM" => "10", # Non-Spacing Mark
"BN" => "11", # Boundary Neutral
"B" => "12", # Paragraph Separator
"S" => "13", # Segment Separator
"WS" => "14", # Whitespace
"LRE" => "15", # Left-to-Right Embedding
"RLE" => "15", # Right-to-Left Embedding
"PDF" => "15", # Pop Directional Format
"LRO" => "15", # Left-to-Right Override
"RLO" => "15" # Right-to-Left Override
);
%special = ();
######################################################################
#
# Open the unicode database file
#
######################################################################
open ( UNICODATA , "< UnicodeData-Latest.txt")
|| die "cannot find UnicodeData-Latest.txt";
######################################################################
#
# Open the output file
#
######################################################################
open ( OUT , "> ../base/src/bidicattable.h")
|| die "cannot open output ../base/src/bidicattable.h file";
######################################################################
#
# Generate license and header
#
######################################################################
$npl = <<END_OF_NPL;
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "MPL"); you may not use this file except in
* compliance with the MPL. You may obtain a copy of the MPL at
* http://www.mozilla.org/MPL/
*
* Software distributed under the MPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the MPL
* for the specific language governing rights and limitations under the
* MPL.
*
* The Initial Developer of the Original Code is IBM
* Corporation. Portions created by IBM are
* Copyright (C) 2000 IBM Corporation. All
* Rights Reserved.
*/
/*
DO NOT EDIT THIS DOCUMENT !!! THIS DOCUMENT IS GENERATED BY
mozilla/layout/tools/genbidicattable.pl
*/
END_OF_NPL
print OUT $npl;
print OUT "\n\n#include \"nscore.h\" \n\n";
%bidicategory = ();
%sh = ();
%sl = ();
%sc = ();
######################################################################
#
# Process the file line by line
#
######################################################################
while(<UNICODATA>) {
chop;
######################################################################
#
# Get value from fields
#
######################################################################
@f = split(/;/ , $_);
$c = $f[0]; # The unicode value
$n = $f[1]; # The unicode name
$g = $f[2]; # The General Category
$b = $f[4]; # The Bidi Category
if(( substr($n, 0, 1) ne "<") || ($n eq "<control>"))
{
#
# print $g;
#
$gcount{$b}++;
$bidicategory{$c} = $b;
} else {
# Handle special block
@pair=split(/, /, $n );
$catnum = $map{$b};
# printf "[%s][%s] => %d\n", $pair[0], $pair[1], $catnum;
if( $pair[1] eq "First>") {
$sl{$pair[0]} = $c;
$sc{$pair[0]} = $catnum;
} elsif ( $pair[1] eq "Last>") {
$sh{$pair[0]} = $c;
if($sc{$pair[0]} ne $catnum)
{
print "WARNING !!!! error in handling special block\n\n";
}
} else {
print "WARNING !!!! error in handling special block\n\n";
}
}
}
# XXX - How can this be made more flexible as new blocks are added to the UCDB?
@range = (
0x0000, 0x07ff,
0x0900, 0x18ff,
0x1e00, 0x28ff,
0x2e80, 0x33ff,
0xa000, 0xa4ff,
0xf900, 0xffff
);
$totaldata = 0;
$tt=($#range+1) / 2;
@patarray = ();
# This should improve performance: put all the patterns like 0x11111111, 0x22222222 etc at the beginning of the table.
# Since there are a lot of blocks with the same category, we should be able to save a lot of time extracting the digits
for (0..15) {
$pattern = "0x".(sprintf("%X", $_) x 8);
$patarray[$_] = $pattern;
$pat{$pattern} = $_;
}
$newidx = 0x10;
for($t = 1; $t <= $tt; $t++)
{
$tl = $range[($t-1) * 2];
$th = $range[($t-1) * 2 + 1];
$ts = ( $th - $tl ) >> 3;
$totaldata += $ts + 1;
printf OUT "static PRUint8 gBidiCatIdx%d[%d] = {\n", $t, $ts + 1;
for($i = ($tl >> 3); $i <= ($th >> 3) ; $i ++ )
{
$data = 0;
for($j = 0; $j < 8 ; $j++)
{
#defaults for unassigned characters -- see table 3.7 in the Unicode Bidi Algorithm
$test = ($i << 3) + $j;
if ((($test >= 0x0590) && ($test <= 0x5FF))
|| (($test >= 0xFB1D) && ($test <= 0xFB4F)))
{
$default = $map{"R"};
} elsif ((($test >= 0x0600) && ($test <= 0x7BF))
|| (($test >= 0xFB50) && ($test <= 0xFDFF))
|| (($test >= 0xFE70) && ($test <= 0xFEFF)))
{
$default = $map{"AL"};
} else
{
$default = $map{"L"};
}
$k = sprintf("%04X", (($i << 3) + $j));
$cat = $bidicategory{$k};
if( $cat eq "")
{
$data = $data + ($default << (4*$j));
} else {
$data = $data + ($map{$cat} << (4*$j));
}
}
$pattern = sprintf("0x%08X", $data);
$idx = $pat{$pattern};
unless( exists($pat{$pattern})){
$idx = $newidx++;
$patarray[$idx] = $pattern;
$pat{$pattern} = $idx;
}
printf OUT " %3d, /* U+%04X - U+%04X : %s */\n" ,
$idx, ($i << 3),((($i +1)<< 3)-1), $pattern ;
}
printf OUT "};\n\n";
if($t ne $tt)
{
$tl = $range[($t-1) * 2 + 1] + 1;
$th = $range[$t * 2] - 1;
for($i = ($tl >> 3); $i <= ($th >> 3) ; $i ++ )
{
$data = 0;
for($j = 0; $j < 8 ; $j++)
{
$k = sprintf("%04X", (($i << 3) + $j));
$cat = $bidicategory{$k};
if( $cat ne "")
{
$data = $data + ($map{$cat} << (4*$j));
}
}
$pattern = sprintf("0x%08X", $data);
if($data ne 0)
{
print "WARNING, Unicode Database now contain characters" .
"which we have not consider, change this program !!!\n\n";
printf "Problem- U+%04X - U+%04X range\n", ($i << 3),((($i +1)<< 3)-1);
}
}
}
}
if($newidx > 255)
{
die "We have more than 255 patterns !!! - $newidx\n\n" .
"This program is now broken!!!\n\n\n";
}
printf OUT "static PRUint32 gBidiCatPat[$newidx] = {\n";
for($i = 0 ; $i < $newidx; $i++)
{
printf OUT " %s, /* $i */\n", $patarray[$i] ;
}
printf OUT "};\n\n";
$totaldata += $newidx * 4;
printf OUT "static eBidiCategory GetBidiCat(PRUnichar u)\n{\n";
printf OUT " PRUint32 pat;\n";
printf OUT " PRUint16 patidx;\n\n";
printf OUT " /* Handle blocks which use index table mapping */ \n\n";
for($t = 1; $t <= $tt; $t++)
{
$tl = $range[($t-1) * 2];
$th = $range[($t-1) * 2 + 1];
if ($tl == 0) {
printf OUT " /* Handle U+%04X to U+%04X */\n", $tl, $th;
printf OUT " if (u<=((PRUnichar)0x%04X)) {\n", $th;
printf OUT " patidx = gBidiCatIdx%d [( u >> 3 )];\n", $t;
} elsif ($th == 0xFFFF) {
printf OUT " /* Handle U+%04X to U+%04X */\n", $tl, $th;
printf OUT " if (((PRUnichar)0x%04X)<=u) {\n", $tl;
printf OUT " patidx = gBidiCatIdx%d [( (u -(PRUnichar) 0x%04X) >> 3 )];\n", $t, $tl;
} else {
printf OUT " /* Handle U+%04X to U+%04X */\n", $tl, $th;
printf OUT " if ((((PRUnichar)0x%04X)<=u)&&(u<=((PRUnichar)0x%04X))) {\n", $tl, $th;
printf OUT " patidx = gBidiCatIdx%d [( (u -(PRUnichar) 0x%04X) >> 3 )];\n", $t, $tl;
}
printf OUT " if (patidx < 0x10)\n";
printf OUT " return (eBidiCategory)patidx;\n";
printf OUT " else {\n";
printf OUT " pat = gBidiCatPat[patidx];\n";
printf OUT " return (eBidiCategory)((pat >> ((u % 8) * 4)) & 0x0F);\n";
printf OUT " }\n";
printf OUT " }\n\n";
}
@special = keys(%sh);
$sp = 0;
foreach $s ( sort(@special) ) {
# don't bother to define the special blocks unless they have a different
# value from the default they would be given if they were undefined
unless ($sc{$s} == $map{"L"}) {
unless ($sp++) {
%by_value = reverse %map;
printf OUT " /* Handle blocks which share the same category */\n\n";
}
printf OUT " /* Handle %s block */\n", substr($s, 1);
printf OUT " if((((PRUnichar)0x%s)<=u)&&(u<=((PRUnichar)0x%s))) \n", $sl{$s}, $sh{$s};
printf OUT " return eBidiCat_$by_value{$sc{$s}}; \n\n";
}
}
printf OUT " return eBidiCat_L; /* UNDEFINE = L */\n}\n";
printf OUT "/* total data size = $totaldata */\n";
print "total = $totaldata\n";
######################################################################
#
# Close files
#
######################################################################
close(UNIDATA);
close(OUT);
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