UtfNormalGenerate.php

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<?php
# Copyright (C) 2004 Brion Vibber <brion@pobox.com>
# http://www.mediawiki.org/
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or 
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# http://www.gnu.org/copyleft/gpl.html

if( php_sapi_name() != 'cli' ) {
        die( "Run me from the command line please.\n" );
}

require_once 'UtfNormalUtil.php';

$in = fopen("DerivedNormalizationProps.txt", "rt" );
if( !$in ) {
        print "Can't open DerivedNormalizationProps.txt for reading.\n";
        print "If necessary, fetch this file from the internet:\n";
        print "http://www.unicode.org/Public/UNIDATA/CompositionExclusions.txt\n";
        exit(-1);
}
print "Initializing normalization quick check tables...\n";
$checkNFC = array();
while( false !== ($line = fgets( $in ) ) ) {
        if( preg_match( '/^([0-9A-F]+)(?:..([0-9A-F]+))?\s*;\s*(NFC_QC)\s*;\s*([MN])/', $line, $matches ) ) {
                list( $junk, $first, $last, $prop, $value ) = $matches;
                #print "$first $last $prop $value\n";
                if( !$last ) $last = $first;
                for( $i = hexdec( $first ); $i <= hexdec( $last ); $i++) {
                        $char = codepointToUtf8( $i );
                        $checkNFC[$char] = $value;
                }
        }
}
fclose( $in );

$in = fopen("CompositionExclusions.txt", "rt" );
if( !$in ) {
        print "Can't open CompositionExclusions.txt for reading.\n";
        print "If necessary, fetch this file from the internet:\n";
        print "http://www.unicode.org/Public/UNIDATA/CompositionExclusions.txt\n";
        exit(-1);
}
$exclude = array();
while( false !== ($line = fgets( $in ) ) ) {
        if( preg_match( '/^([0-9A-F]+)/i', $line, $matches ) ) {
                $codepoint = $matches[1];
                $source = codepointToUtf8( hexdec( $codepoint ) );
                $exclude[$source] = true;
        }
}
fclose($in);

$in = fopen("UnicodeData.txt", "rt" );
if( !$in ) {
        print "Can't open UnicodeData.txt for reading.\n";
        print "If necessary, fetch this file from the internet:\n";
        print "http://www.unicode.org/Public/UNIDATA/UnicodeData.txt\n";
        exit(-1);
}

$compatibilityDecomp = array();
$canonicalDecomp = array();
$canonicalComp = array();
$combiningClass = array();
$total = 0;
$compat = 0;
$canon = 0;

print "Reading character definitions...\n";
while( false !== ($line = fgets( $in ) ) ) {
        $columns = split(';', $line);
        $codepoint = $columns[0];
        $name = $columns[1];
        $canonicalCombiningClass = $columns[3];
        $decompositionMapping = $columns[5];
        
        $source = codepointToUtf8( hexdec( $codepoint ) );

        if( $canonicalCombiningClass != 0 ) {
                $combiningClass[$source] = IntVal( $canonicalCombiningClass );
        }
        
        if( $decompositionMapping === '' ) continue;
        if( preg_match( '/^<(.+)> (.*)$/', $decompositionMapping, $matches ) ) {
                # Compatibility decomposition
                $canonical = false;
                $decompositionMapping = $matches[2];
                $compat++;
        } else {
                $canonical = true;
                $canon++;
        }
        $total++;
        $dest = hexSequenceToUtf8( $decompositionMapping );
        
        $compatibilityDecomp[$source] = $dest;
        if( $canonical ) {
                $canonicalDecomp[$source] = $dest;
                if( empty( $exclude[$source] ) ) {
                        $canonicalComp[$dest] = $source;
                }
        }
        #print "$codepoint | $canonicalCombiningClasses | $decompositionMapping\n";
}
fclose( $in );

print "Recursively expanding canonical mappings...\n";
$changed = 42;
$pass = 1;
while( $changed > 0 ) {
        print "pass $pass\n";
        $changed = 0;
        foreach( $canonicalDecomp as $source => $dest ) {
                $newDest = preg_replace_callback(
                        '/([\xc0-\xff][\x80-\xbf]+)/',
                        'callbackCanonical',
                        $dest);
                if( $newDest === $dest ) continue;
                $changed++;
                $canonicalDecomp[$source] = $newDest;
        }
        $pass++;
}

print "Recursively expanding compatibility mappings...\n";
$changed = 42;
$pass = 1;
while( $changed > 0 ) {
        print "pass $pass\n";
        $changed = 0;
        foreach( $compatibilityDecomp as $source => $dest ) {
                $newDest = preg_replace_callback(
                        '/([\xc0-\xff][\x80-\xbf]+)/',
                        'callbackCompat',
                        $dest);
                if( $newDest === $dest ) continue;
                $changed++;
                $compatibilityDecomp[$source] = $newDest;
        }
        $pass++;
}

print "$total decomposition mappings ($canon canonical, $compat compatibility)\n";

$out = fopen("UtfNormalData.inc", "wt");
if( $out ) {
        $serCombining = escapeSingleString( serialize( $combiningClass ) );
        $serComp = escapeSingleString( serialize( $canonicalComp ) );
        $serCanon = escapeSingleString( serialize( $canonicalDecomp ) );
        $serCheckNFC = escapeSingleString( serialize( $checkNFC ) );
        $outdata = "<" . "?php
global \$utfCombiningClass, \$utfCanonicalComp, \$utfCanonicalDecomp, \$utfCheckNFC;
\$utfCombiningClass = unserialize( '$serCombining' );
\$utfCanonicalComp = unserialize( '$serComp' );
\$utfCanonicalDecomp = unserialize( '$serCanon' );
\$utfCheckNFC = unserialize( '$serCheckNFC' );
?" . ">\n";
        fputs( $out, $outdata );
        fclose( $out );
        print "Wrote out UtfNormalData.inc\n";
} else {
        print "Can't create file UtfNormalData.inc\n";
        exit(-1);
}


$out = fopen("UtfNormalDataK.inc", "wt");
if( $out ) {
        $serCompat = escapeSingleString( serialize( $compatibilityDecomp ) );
        $outdata = "<" . "?php
global \$utfCompatibilityDecomp;
\$utfCompatibilityDecomp = unserialize( '$serCompat' );
?" . ">\n";
        fputs( $out, $outdata );
        fclose( $out );
        print "Wrote out UtfNormalDataK.inc\n";
        exit(0);
} else {
        print "Can't create file UtfNormalDataK.inc\n";
        exit(-1);
}

# ---------------

function callbackCanonical( $matches ) {
        global $canonicalDecomp;
        if( isset( $canonicalDecomp[$matches[1]] ) ) {
                return $canonicalDecomp[$matches[1]];
        }
        return $matches[1];
}

function callbackCompat( $matches ) {
        global $compatibilityDecomp;
        if( isset( $compatibilityDecomp[$matches[1]] ) ) {
                return $compatibilityDecomp[$matches[1]];
        }
        return $matches[1];
}

?>