LanguageEo.php

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<?php
class LanguageEo extends Language {
        function iconv( $in, $out, $string ) {
                if ( strcasecmp( $in, 'x' ) == 0 && strcasecmp( $out, 'utf-8' ) == 0 ) {
                        return preg_replace_callback (
                                '/([cghjsu]x?)((?:xx)*)(?!x)/i',
                                array( $this, 'strrtxuCallback' ), $string      );
                } elseif ( strcasecmp( $in, 'UTF-8' ) == 0 && strcasecmp( $out, 'x' ) == 0 ) {
                        # Double Xs only if they follow cxapelutaj literoj.
                        return preg_replace_callback(
                                '/((?:[cghjsu]|\xc4[\x88\x89\x9c\x9d\xa4\xa5\xb4\xb5]|\xc5[\x9c\x9d\xac\xad])x*)/i',
                                array( $this, 'strrtuxCallback' ), $string );
                }
                return parent::iconv( $in, $out, $string );
        }

        function strrtuxCallback( $matches ) {
                static $ux = array (
                        'x' => 'xx' , 'X' => 'Xx' ,
                        "\xc4\x88" => "Cx" , "\xc4\x89" => "cx" ,
                        "\xc4\x9c" => "Gx" , "\xc4\x9d" => "gx" ,
                        "\xc4\xa4" => "Hx" , "\xc4\xa5" => "hx" ,
                        "\xc4\xb4" => "Jx" , "\xc4\xb5" => "jx" ,
                        "\xc5\x9c" => "Sx" , "\xc5\x9d" => "sx" ,
                        "\xc5\xac" => "Ux" , "\xc5\xad" => "ux"
                );
                return strtr( $matches[1], $ux );
        }

        function strrtxuCallback( $matches ) {
                static $xu = array (
                        'xx' => 'x' , 'xX' => 'x' ,
                        'Xx' => 'X' , 'XX' => 'X' ,
                        "Cx" => "\xc4\x88" , "CX" => "\xc4\x88" ,
                        "cx" => "\xc4\x89" , "cX" => "\xc4\x89" ,
                        "Gx" => "\xc4\x9c" , "GX" => "\xc4\x9c" ,
                        "gx" => "\xc4\x9d" , "gX" => "\xc4\x9d" ,
                        "Hx" => "\xc4\xa4" , "HX" => "\xc4\xa4" ,
                        "hx" => "\xc4\xa5" , "hX" => "\xc4\xa5" ,
                        "Jx" => "\xc4\xb4" , "JX" => "\xc4\xb4" ,
                        "jx" => "\xc4\xb5" , "jX" => "\xc4\xb5" ,
                        "Sx" => "\xc5\x9c" , "SX" => "\xc5\x9c" ,
                        "sx" => "\xc5\x9d" , "sX" => "\xc5\x9d" ,
                        "Ux" => "\xc5\xac" , "UX" => "\xc5\xac" ,
                        "ux" => "\xc5\xad" , "uX" => "\xc5\xad"
                );
                return strtr( $matches[1], $xu ) . strtr( $matches[2], $xu );
        }

        function checkTitleEncoding( $s ) {
                # Check for X-system backwards-compatibility URLs
                $ishigh = preg_match( '/[\x80-\xff]/', $s );
                $isutf = preg_match( '/^([\x00-\x7f]|[\xc0-\xdf][\x80-\xbf]|' .
                        '[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xf7][\x80-\xbf]{3})+$/', $s );

                if ( $ishigh and !$isutf ) {
                        # Assume Latin1
                        $s = utf8_encode( $s );
                } else {
                        if ( preg_match( '/(\xc4[\x88\x89\x9c\x9d\xa4\xa5\xb4\xb5]' .
                                '|\xc5[\x9c\x9d\xac\xad])/', $s ) )
                        return $s;
                }

                // if( preg_match( '/[cghjsu]x/i', $s ) )
                //      return $this->iconv( 'x', 'utf-8', $s );
                return $s;
        }

        function initEncoding() {
                global $wgEditEncoding;
                $wgEditEncoding = 'x';
        }
}