gecko/layout/tools/gensymmtable.pl

178 lines
6.6 KiB
Perl

#!/usr/local/bin/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 IBM code.
#
# The Initial Developer of the Original Code is
# IBM. Portions created by IBM are Copyright (C) International Business Machines Corporation, 2000. All Rights Reserved.
# Portions created by the Initial Developer are Copyright (C) 2001
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
# Simon Montagu
#
# Alternatively, the contents of this file may be used under the terms of
# either of 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 program generates the header file symmtable.h from the Unicode
# informative data file BidiMirroring.txt.
# See the comments in that file for details of its structure and contents.
#
# At the moment we only handle cases where there is another Unicode
# character whose glyph can serve as at least an adequate version of
# the mirror image of the original character's glyph. This leaves open
# the problem of how to provide mirrored glyphs for characters where
# this is not the case.
# Process the input file
$ucp = "[0-9a-fA-F]{4}"; # Unicode code point (4 successive hex digits) as a pattern to match
open ( UNICODATA , "< BidiMirroring.txt")
|| die "Cannot find BidiMirroring.txt.\
The file should be avaiable here:\
http://www.unicode.org/Public/UNIDATA/BidiMirroring.txt\n";
while (<UNICODATA>) {
chop;
if (/^($ucp); ($ucp) # (.+)/) { # If the line looks like this pattern
# (example: 0028; 0029 # LEFT PARENTHESIS)
if (hex($1) > 0xFFFF) {
printf "ALERT! %X There are now symmetric characters outside the BMP\n", $1;
}
@table[hex($1)]=hex($2); # Enter the symmetric pair in the table
@isblock[hex(substr($1, 0, 2))]=1; # Remember this block
}
}
close(UNICODATA);
# Generate license and header
open ( OUT , "> ../base/symmtable.h")
|| die "cannot open output ../base/src/symmtable.h file";
$npl = <<END_OF_NPL;
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* ***** 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 IBM code.
*
* The Initial Developer of the Original Code is
* International Business Machines Corporation.
* Portions created by the Initial Developer are Copyright (C) 2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* 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 ***** */
/*
DO NOT EDIT THIS DOCUMENT !!! THIS DOCUMENT IS GENERATED BY
mozilla/layout/tools/gensymmtable.pl
*/
END_OF_NPL
print OUT $npl;
# Generate data tables
$indexed_blocks = 0;
printf OUT "\n/* Indexes to symmtable by Unicode block */\n";
printf OUT "const static PRUint8 symmtable_index[256] = {\n";
print OUT "/* ";
foreach $byte (0 .. 0xf) {
printf OUT "_%X ", $byte;
}
print OUT "*/\n";
foreach $row (0 .. 0xf) {
printf OUT "/* %X_ */ ", $row;
foreach $byte (0 .. 0xf) {
if (@isblock[($row << 4) | ($byte)]) {
printf OUT " %d,", ++$indexed_blocks;
} else {
printf OUT " 0,";
}
}
print OUT "\n";
}
print OUT "};\n";
printf OUT "const static PRUint16 symmtable[%d] [256] = {\n", ($indexed_blocks);
foreach $block (0 .. 0xff) {
if (@isblock[$block]) {
if ($block != 0) {
printf OUT ",\n"
}
printf OUT " {\n/* Block U%02X__ */\n", $block;
print OUT "/* ";
foreach $byte (0 .. 0xf) {
printf OUT " _%X ", $byte;
}
print OUT "*/\n";
foreach $row (0 .. 0xf) {
printf OUT "/* %X_ */ ", $row;
foreach $byte (0 .. 0xf) {
$ix = ($block << 8) | ($row << 4) | ($byte);
printf OUT ("%#6x", (@table[$ix]) ? @table[$ix] : $ix);
if ((($row << 4) | $byte) < 0xff) {
print OUT ", ";
}
}
print OUT "\n";
}
print OUT " }";
}
}
print OUT "\n};\n";
# Generate conversion method
print OUT "\nstatic PRUint32 Mirrored(PRUint32 u)\n{\n";
print OUT " if (u < 0x10000) {\n";
print OUT " PRUint8 index = symmtable_index[(u & 0xFFFFFF00) >> 8];\n";
print OUT " if (index) {\n";
print OUT " return symmtable[index - 1] [u & 0xFF];\n";
print OUT " }\n";
print OUT " }\n return u;\n}\n";
close(OUT);