FM / Gif

/home/techb158/exp.abdallabala.com/vendor/mpdf/mpdf/src/Gif/

/home/techb158/exp.abdallabala.com/vendor/mpdf/mpdf/src/Gif

Name	Size	Mode	Actions
ColorTable.php	1628	0644	edit dl rm
FileHeader.php	1946	0644	edit dl rm
Gif.php	1285	0644	edit dl rm
Image.php	3248	0644	edit dl rm
ImageHeader.php	1751	0644	edit dl rm
Lzw.php	4919	0644	edit dl rm

Edit: /home/techb158/exp.abdallabala.com/vendor/mpdf/mpdf/src/Gif/Lzw.php (4919B)

<?php

namespace Mpdf\Gif;

/**
 * GIF Util - (C) 2003 Yamasoft (S/C)
 *
 * All Rights Reserved
 *
 * This file can be freely copied, distributed, modified, updated by anyone under the only
 * condition to leave the original address (Yamasoft, http://www.yamasoft.com) and this header.
 *
 * @link http://www.yamasoft.com
 */
class Lzw
{

var $MAX_LZW_BITS;

var $Fresh;
	var $CodeSize;
	var $SetCodeSize;
	var $MaxCode;
	var $MaxCodeSize;
	var $FirstCode;
	var $OldCode;

var $ClearCode;
	var $EndCode;
	var $Next;
	var $Vals;
	var $Stack;
	var $sp;
	var $Buf;
	var $CurBit;
	var $LastBit;
	var $Done;
	var $LastByte;

public function __construct()
	{
		$this->MAX_LZW_BITS = 12;

unset($this->Next);
		unset($this->Vals);
		unset($this->Stack);
		unset($this->Buf);

$this->Next = range(0, (1 << $this->MAX_LZW_BITS) - 1);
		$this->Vals = range(0, (1 << $this->MAX_LZW_BITS) - 1);
		$this->Stack = range(0, (1 << ($this->MAX_LZW_BITS + 1)) - 1);
		$this->Buf = range(0, 279);
	}

function deCompress($data, &$datLen)
	{
		$stLen = strlen($data);
		$datLen = 0;
		$ret = "";
		$dp = 0;  // data pointer
		// INITIALIZATION
		$this->LZWCommandInit($data, $dp);

while (($iIndex = $this->LZWCommand($data, $dp)) >= 0) {
			$ret .= chr($iIndex);
		}

$datLen = $dp;

if ($iIndex != -2) {
			return false;
		}

return $ret;
	}

function LZWCommandInit(&$data, &$dp)
	{
		$this->SetCodeSize = ord($data[0]);
		$dp += 1;

$this->CodeSize = $this->SetCodeSize + 1;
		$this->ClearCode = 1 << $this->SetCodeSize;
		$this->EndCode = $this->ClearCode + 1;
		$this->MaxCode = $this->ClearCode + 2;
		$this->MaxCodeSize = $this->ClearCode << 1;

$this->GetCodeInit($data, $dp);

$this->Fresh = 1;
		for ($i = 0; $i < $this->ClearCode; $i++) {
			$this->Next[$i] = 0;
			$this->Vals[$i] = $i;
		}

for (; $i < (1 << $this->MAX_LZW_BITS); $i++) {
			$this->Next[$i] = 0;
			$this->Vals[$i] = 0;
		}

$this->sp = 0;
		return 1;
	}

function LZWCommand(&$data, &$dp)
	{
		if ($this->Fresh) {
			$this->Fresh = 0;
			do {
				$this->FirstCode = $this->GetCode($data, $dp);
				$this->OldCode = $this->FirstCode;
			} while ($this->FirstCode == $this->ClearCode);

return $this->FirstCode;
		}

if ($this->sp > 0) {
			$this->sp--;
			return $this->Stack[$this->sp];
		}

while (($Code = $this->GetCode($data, $dp)) >= 0) {
			if ($Code == $this->ClearCode) {
				for ($i = 0; $i < $this->ClearCode; $i++) {
					$this->Next[$i] = 0;
					$this->Vals[$i] = $i;
				}

for (; $i < (1 << $this->MAX_LZW_BITS); $i++) {
					$this->Next[$i] = 0;
					$this->Vals[$i] = 0;
				}

$this->CodeSize = $this->SetCodeSize + 1;
				$this->MaxCodeSize = $this->ClearCode << 1;
				$this->MaxCode = $this->ClearCode + 2;
				$this->sp = 0;
				$this->FirstCode = $this->GetCode($data, $dp);
				$this->OldCode = $this->FirstCode;

return $this->FirstCode;
			}

if ($Code == $this->EndCode) {
				return -2;
			}

$InCode = $Code;
			if ($Code >= $this->MaxCode) {
				$this->Stack[$this->sp++] = $this->FirstCode;
				$Code = $this->OldCode;
			}

while ($Code >= $this->ClearCode) {
				$this->Stack[$this->sp++] = $this->Vals[$Code];

if ($Code == $this->Next[$Code]) { // Circular table entry, big GIF Error!
					return -1;
				}

$Code = $this->Next[$Code];
			}

$this->FirstCode = $this->Vals[$Code];
			$this->Stack[$this->sp++] = $this->FirstCode;

if (($Code = $this->MaxCode) < (1 << $this->MAX_LZW_BITS)) {
				$this->Next[$Code] = $this->OldCode;
				$this->Vals[$Code] = $this->FirstCode;
				$this->MaxCode++;

if (($this->MaxCode >= $this->MaxCodeSize) && ($this->MaxCodeSize < (1 << $this->MAX_LZW_BITS))) {
					$this->MaxCodeSize *= 2;
					$this->CodeSize++;
				}
			}

$this->OldCode = $InCode;
			if ($this->sp > 0) {
				$this->sp--;
				return $this->Stack[$this->sp];
			}
		}

return $Code;
	}

function GetCodeInit(&$data, &$dp)
	{
		$this->CurBit = 0;
		$this->LastBit = 0;
		$this->Done = 0;
		$this->LastByte = 2;
		return 1;
	}

function GetCode(&$data, &$dp)
	{
		if (($this->CurBit + $this->CodeSize) >= $this->LastBit) {
			if ($this->Done) {
				if ($this->CurBit >= $this->LastBit) {
					// Ran off the end of my bits
					return 0;
				}
				return -1;
			}

$this->Buf[0] = $this->Buf[$this->LastByte - 2];
			$this->Buf[1] = $this->Buf[$this->LastByte - 1];

$Count = ord($data[$dp]);
			$dp += 1;

if ($Count) {
				for ($i = 0; $i < $Count; $i++) {
					$this->Buf[2 + $i] = ord($data[$dp + $i]);
				}
				$dp += $Count;
			} else {
				$this->Done = 1;
			}

$this->LastByte = 2 + $Count;
			$this->CurBit = ($this->CurBit - $this->LastBit) + 16;
			$this->LastBit = (2 + $Count) << 3;
		}

$iRet = 0;
		for ($i = $this->CurBit, $j = 0; $j < $this->CodeSize; $i++, $j++) {
			$iRet |= (($this->Buf[intval($i / 8)] & (1 << ($i % 8))) != 0) << $j;
		}

$this->CurBit += $this->CodeSize;
		return $iRet;
	}
}

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