first commit

2022-11-25 07:07:16 +01:00
commit c086b964da
3188 changed files with 1063828 additions and 0 deletions
--- a/admin/prints/decoders/lzw.php
+++ b/admin/prints/decoders/lzw.php
@ -0,0 +1,151 @@
+<?php
+//
+//  FPDI - Version 1.1
+//
+//    Copyright 2004,2005 Setasign - Jan Slabon
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+//
+
+class LZWDecode {
+
+    var $sTable = array();
+    var $data = null;
+    var $tIdx;
+    var $bitsToGet = 9;
+    var $bytePointer;
+    var $bitPointer;
+    var $nextData = 0;
+    var $nextBits = 0;
+    var $andTable = array(511, 1023, 2047, 4095);
+
+    function LZWDecode(&$fpdi) {
+        $this->fpdi =& $fpdi;
+    }
+
+    /**
+     * Method to decode LZW compressed data.
+     *
+     * @param string data    The compressed data.
+     */
+    function decode(&$data) {
+
+        if($data[0] == 0x00 && $data[1] == 0x01) {
+            $this->fpdi->error("LZW flavour not supported.");
+        }
+
+        $this->initsTable();
+
+        $this->data =& $data;
+
+        // Initialize pointers
+        $this->bytePointer = 0;
+        $this->bitPointer = 0;
+
+        $this->nextData = 0;
+        $this->nextBits = 0;
+
+        $oldCode = 0;
+
+        $string = "";
+        $uncompData = "";
+
+        while (($code = $this->getNextCode()) != 257) {
+            if ($code == 256) {
+                $this->initsTable();
+                $code = $this->getNextCode();
+
+                if ($code == 257) {
+                    break;
+                }
+
+                $uncompData .= $this->sTable[$code];
+                $oldCode = $code;
+
+            } else {
+
+                if ($code < $this->tIdx) {
+                    $string = $this->sTable[$code];
+                    $uncompData .= $string;
+
+                    $this->addStringToTable($this->sTable[$oldCode], $string[0]);
+                    $oldCode = $code;
+                } else {
+                    $string = $this->sTable[$oldCode];
+                    $string = $string.$string[0];
+                    $uncompData .= $string;
+
+                    $this->addStringToTable($string);
+                    $oldCode = $code;
+                }
+            }
+        }
+        
+        return $uncompData;
+    }
+
+
+    /**
+     * Initialize the string table.
+     */
+    function initsTable() {
+        $this->sTable = array();
+
+        for ($i = 0; $i < 256; $i++)
+            $this->sTable[$i] = chr($i);
+
+        $this->tIdx = 258;
+        $this->bitsToGet = 9;
+    }
+
+    /**
+     * Add a new string to the string table.
+     */
+    function addStringToTable ($oldString, $newString="") {
+        $string = $oldString.$newString;
+
+        // Add this new String to the table
+        $this->sTable[$this->tIdx++] = $string;
+
+        if ($this->tIdx == 511) {
+            $this->bitsToGet = 10;
+        } else if ($this->tIdx == 1023) {
+            $this->bitsToGet = 11;
+        } else if ($this->tIdx == 2047) {
+            $this->bitsToGet = 12;
+        }
+    }
+
+    // Returns the next 9, 10, 11 or 12 bits
+    function getNextCode() {
+        if ($this->bytePointer == strlen($this->data))
+            return 257;
+
+        $this->nextData = ($this->nextData << 8) | (ord($this->data[$this->bytePointer++]) & 0xff);
+        $this->nextBits += 8;
+
+        if ($this->nextBits < $this->bitsToGet) {
+            $this->nextData = ($this->nextData << 8) | (ord($this->data[$this->bytePointer++]) & 0xff);
+            $this->nextBits += 8;
+        }
+
+        $code = ($this->nextData >> ($this->nextBits - $this->bitsToGet)) & $this->andTable[$this->bitsToGet-9];
+        $this->nextBits -= $this->bitsToGet;
+
+        return $code;
+    }
+}
+
+
+
+?>