source: branches/php/Base/MemoryStream.php@ 30

<?php

class MemoryStream
{
  var $Data;
  var $Position;

  function SetSize($Size)
  {
    if(strlen($this->Data) > $Size)
    {
      $this->Data = substr($this->Data, 0, $Size);
      if($this->Position > strlen($this->Data))
        $this->Position = strlen($this->Data);
    } else
    if(strlen($this->Data) < $Size)
    {
      $this->Data .= str_repeat(' ', $Size - strlen($this->Data));
    }
  }

  function Assign($Stream)
  {
    $this->Data = $Stream->Data;
    $this->Position = $Stream->Position;
  }

  function GetSize()
  {
    return(strlen($this->Data));
  }

  function WriteBlock($Data)
  {
    if($this->Position == strlen($this->Data)) $this->Data .= $Data;
    else
    for($I = 0; $I < strlen($Data); $I++)
    {
      $this->Data[$this->Position] = $Data[$I];
      $this->Position++;
    }
  }

  function WriteUInt8($Data)
  {
    $this->Data[$this->Position] = pack('C', $Data);
    $this->Position++;
  }

  function ReadUInt8()
  {
    $Result = ord($this->Data[$this->Position]);
    $this->Position++;
  }

  function WriteUInt16($Data)
  {
    $this->WriteUInt8($Data);
    $this->WriteUInt8($Data >> 8);
  }

  function ReadUInt16()
  {
    return($this->ReadUInt8 + $this->ReadUInt8 << 8);
  }

  function WriteUInt32($Data)
  {
    $this->WriteUInt8($Data);
    $this->WriteUInt8($Data >> 8);
    $this->WriteUInt8($Data >> 16);
    $this->WriteUInt8($Data >> 24);
  }

  function ReadUInt32()
  {
    return($this->ReadUInt8 | ($this->ReadUInt8 << 8) | 
      ($this->ReadUInt8 << 16) | ($this->ReadUInt8 << 24));
  }

}


?>