StringBuffer.php
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<?php
/**
* Streams library
* Copyright (c) 2012, Remco Pander
*
* This library consists of a set of classes that can be used to create high-performing
* applications using full-duplex connections. It uses the built-in stream functions
* provided with php.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
* @package Streams
* @author Remco Pander <[email protected]>
* @version v1 initial release
* @copyright Copyright (c) 2012, Remco Pander
*/
namespace Streams;
class StringBuffer
{
// Buffer
private $s_Buffer = null;
private $i_Length = 0;
private $s_lineEnd = "\n";
public function setLineEnding ($s_newEnding)
{
$this -> s_lineEnd = (string) $s_newEnding;
}
// (string) StringBuffer
public function __toString ()
{
return $this -> s_Buffer;
}
public function toString ()
{
return $this -> s_Buffer;
}
public function toArray ()
{
return $this -> getLines ();
}
// Adds one or more characters to the buffer
public function appendBuffer ($s_String)
{
$this -> s_Buffer .= (string) $s_String;
$this -> i_Length += strlen ($s_String);
return true;
}
public function prependBuffer ($s_String)
{
$this -> s_Buffer = $s_String . $this -> s_Buffer;
$this -> i_Length += strlen ($s_String);
return true;
}
public function hasBuffer ()
{
return ($this -> i_Length > 0);
}
public function hasLine ()
{
return stripos ($this -> s_Buffer, $this -> s_lineEnd);
}
public function getSize ()
{
return $this -> i_Length;
}
// Removes x amount of bytes from the beginning or end of the buffer
public function removeLength ($i_Length, $b_Prepend = true)
{
if ($i_Length < 0)
{
throw new InvalidArgumentException ('StringBuffer :: removeLength () expects parameter 1 to be positive.');
} else if ($i_Length > $this -> i_Length)
{
$this -> s_Buffer = null;
$this -> i_Length = 0;
return true;
}
// Remove from beginning or end?
if ($b_Prepend)
{
$this -> s_Buffer = substr ($this -> s_Buffer, $i_Length);
$this -> i_Length -= $i_Length;
} else
{
$this -> s_Buffer = substr ($this -> s_Buffer, 0, $i_Length);
$this -> i_Length -= $i_Length;
}
return true;
}
// Returns all of the buffer.
public function getBuffer ()
{
return $this -> s_Buffer;
}
// Clears buffer
public function flushBuffer ()
{
$this -> s_Buffer = null;
$this -> i_Lenght = 0;
return true;
}
// Returns one line from the buffer
// or false if it has none.
public function getLine ()
{
if (!$this -> hasLine ())
{
return false;
}
$i_Offset = stripos ($this -> s_Buffer, $this -> s_lineEnd);
$s_theLine = substr ($this -> s_Buffer, 0, $i_Offset);
$this -> s_Buffer = substr ($this -> s_Buffer, $i_Offset + strlen ($this -> s_lineEnd) + 1);
$this -> i_Size -= ($i_Offset + strlen ($this -> s_lineEnd));
return $s_theLine;
}
// Returns as many lines from the buffer as possible
// as an array
public function getLines ()
{
if (!$this -> hasLine ())
{
return false;
}
$i_Offset = strripos ($this -> s_Buffer, $this -> s_lineEnd);
$s_Lines = substr ($this -> s_Buffer, 0, $i_Offset);
$this -> s_Buffer = substr ($this -> s_Buffer, $i_Offset + strlen ($this -> s_lineEnd) + 1);
$this -> i_Size -= ($i_Offset + strlen ($this -> s_lineEnd));
return explode ($this -> s_lineEnd, $s_Lines);
}
}
/**
* Streams library
* Copyright (c) 2012, Remco Pander
*
* This library consists of a set of classes that can be used to create high-performing
* applications using full-duplex connections. It uses the built-in stream functions
* provided with php.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
* @package Streams
* @author Remco Pander <[email protected]>
* @version v1 initial release
* @copyright Copyright (c) 2012, Remco Pander
*/
namespace Streams;
class StringBuffer
{
// Buffer
private $s_Buffer = null;
private $i_Length = 0;
private $s_lineEnd = "\n";
public function setLineEnding ($s_newEnding)
{
$this -> s_lineEnd = (string) $s_newEnding;
}
// (string) StringBuffer
public function __toString ()
{
return $this -> s_Buffer;
}
public function toString ()
{
return $this -> s_Buffer;
}
public function toArray ()
{
return $this -> getLines ();
}
// Adds one or more characters to the buffer
public function appendBuffer ($s_String)
{
$this -> s_Buffer .= (string) $s_String;
$this -> i_Length += strlen ($s_String);
return true;
}
public function prependBuffer ($s_String)
{
$this -> s_Buffer = $s_String . $this -> s_Buffer;
$this -> i_Length += strlen ($s_String);
return true;
}
public function hasBuffer ()
{
return ($this -> i_Length > 0);
}
public function hasLine ()
{
return stripos ($this -> s_Buffer, $this -> s_lineEnd);
}
public function getSize ()
{
return $this -> i_Length;
}
// Removes x amount of bytes from the beginning or end of the buffer
public function removeLength ($i_Length, $b_Prepend = true)
{
if ($i_Length < 0)
{
throw new InvalidArgumentException ('StringBuffer :: removeLength () expects parameter 1 to be positive.');
} else if ($i_Length > $this -> i_Length)
{
$this -> s_Buffer = null;
$this -> i_Length = 0;
return true;
}
// Remove from beginning or end?
if ($b_Prepend)
{
$this -> s_Buffer = substr ($this -> s_Buffer, $i_Length);
$this -> i_Length -= $i_Length;
} else
{
$this -> s_Buffer = substr ($this -> s_Buffer, 0, $i_Length);
$this -> i_Length -= $i_Length;
}
return true;
}
// Returns all of the buffer.
public function getBuffer ()
{
return $this -> s_Buffer;
}
// Clears buffer
public function flushBuffer ()
{
$this -> s_Buffer = null;
$this -> i_Lenght = 0;
return true;
}
// Returns one line from the buffer
// or false if it has none.
public function getLine ()
{
if (!$this -> hasLine ())
{
return false;
}
$i_Offset = stripos ($this -> s_Buffer, $this -> s_lineEnd);
$s_theLine = substr ($this -> s_Buffer, 0, $i_Offset);
$this -> s_Buffer = substr ($this -> s_Buffer, $i_Offset + strlen ($this -> s_lineEnd) + 1);
$this -> i_Size -= ($i_Offset + strlen ($this -> s_lineEnd));
return $s_theLine;
}
// Returns as many lines from the buffer as possible
// as an array
public function getLines ()
{
if (!$this -> hasLine ())
{
return false;
}
$i_Offset = strripos ($this -> s_Buffer, $this -> s_lineEnd);
$s_Lines = substr ($this -> s_Buffer, 0, $i_Offset);
$this -> s_Buffer = substr ($this -> s_Buffer, $i_Offset + strlen ($this -> s_lineEnd) + 1);
$this -> i_Size -= ($i_Offset + strlen ($this -> s_lineEnd));
return explode ($this -> s_lineEnd, $s_Lines);
}
}