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<?

class RDFile {

	var $file_info;

	var $position;

	var $buffer;

	var $mailbuf;

	var $mailstate=false;

	var $mailbox;

	var $bottom=0;

	var $pop3;

	

	function RDFile($pop3,$file_info){

		$this->file_info=$file_info;

		$this->position=0;

		$this->mailbox=$pop3->ListMessages("",1);

		$this->pop3=$pop3;

		if(isset($this->mailbox[$file_info['parts'][0]['mailid']])) echo "cool";

	}

	

	function evalpart($pos,$bott=false){

		$bottom=0;

		$k=count($this->file_info['parts']);

		for($i=0;$i<$k;$i++){

			if(($pos>=$bottom)&&($pos<($bottom+$this->file_info['parts'][$i]['size']))){

				break;

			}

			$bottom+=$this->file_info['parts'][$i]['size'];

		}

		//echo "bottom:$bottom";flush();

		if($bott) $bott=$bottom;

		return $i;

	}

	

	function fseek($seekpos){

		

		$this->position=$seekpos;

	}

	

	function _fread($count,$position,$mailid){

		$bottom=true;

		$ind=$this->evalpart($position,&$bottom);

		if(($this->mailstate===false)||($this->mailstate!=$ind)){

			$this->mailstate=$this->evalpart($position);

			$this->pop3->RetrieveMessage($this->mailbox[$mailid],$headers,$this->mailbuf,-1);

		}

		//echo "bottom:$bottom";flush();

		//echo "calculate substr pos:$position count:$count startpos:".($position-$bottom)."lenmailbuf:".strlen($this->mailbuf)."\n";flush();

		return substr($this->mailbuf,($position-$bottom),($count));

		

	}

	

	function fread($count){

		if(($this->position+$count)>($this->file_info['size'])){

			$count=$this->file_info['size']-$this->position;

		}

		$this->buffer='';

		$pos=$this->position;

		$cnt=$count;

		$cnt1=$count;

		while (strlen($this->buffer)<$count){

			//echo 'len:'.strlen($this->buffer);flush();

			$bottom=true;

			$ind=$this->evalpart($pos,&$bottom);

			

			if(($pos+$cnt)>($bottom+$this->file_info['parts'][$ind]['size'])){

				$cnt1=$bottom+$this->file_info['parts'][$ind]['size']-$pos;

			}else{

				$cnt1=$cnt;

			}

			$this->buffer.=$this->_fread($cnt1,$pos,$this->file_info['parts'][$ind]['mailid']);

			$pos+=$cnt1;

			$cnt-=$cnt1;

		}

		$this->position=$pos;

		return $this->buffer;

		

	}

	

	function feof(){

		return ($this->position>=$this->file_info['size']);

	}





}

?>