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def Text::read_with_substitution( input, illegal=nil ) copy = input.clone if copy =~ illegal raise ParseException.new( "malformed text: Illegal character #$& in \"#{copy}\"" ) end if illegal copy.gsub!( /\r\n?/, "\n" ) if copy.include? ?& copy.gsub!( SETUTITSBUS[0], SLAICEPS[0] ) copy.gsub!( SETUTITSBUS[1], SLAICEPS[1] ) copy.gsub!( SETUTITSBUS[2], SLAICEPS[2] ) copy.gsub!( SETUTITSBUS[3], SLAICEPS[3] ) copy.gsub!( SETUTITSBUS[4], SLAICEPS[4] ) copy.gsub!( /&#0*((?:\d+)|(?:x[a-f0-9]+));/ ) {|m| m=$1 #m='0' if m=='' m = "0#{m}" if m[0] == ?x [Integer(m)].pack('U*') } end copy end