First Commit

include/pdf_context.php

@@ -0,0 +1,134 @@
+<?php
+//
+//  FPDI - Version 1.01
+//
+//    Copyright 2004 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 pdf_context {
+
+	var $file;
+	var $buffer;
+	var $offset;
+	var $length;
+
+	var $stack;
+
+	// Constructor
+
+	function __construct($f) {
+		$this->file = $f;
+		$this->reset();
+	}
+
+	// Optionally move the file
+	// pointer to a new location
+	// and reset the buffered data
+
+	function reset($pos = null) {
+		if (!is_null ($pos)) {
+			fseek ($this->file, $pos);
+		}
+
+		$this->buffer = fread($this->file, 100);
+		$this->offset = 0;
+		$this->length = strlen($this->buffer);
+		$this->stack = array();
+	}
+
+	// Make sure that there is at least one
+	// character beyond the current offset in
+	// the buffer to prevent the tokenizer
+	// from attempting to access data that does
+	// not exist
+
+	function ensure_content() {
+		if ($this->offset >= $this->length - 1) {
+			return $this->increase_length();
+		} else {
+			return true;
+		}
+	}
+
+	// Forcefully read more data into the buffer
+
+	function increase_length() {
+		if (feof($this->file)) {
+			return false;
+		} else {
+			$this->buffer .= fread($this->file, 100);
+			$this->length = strlen($this->buffer);
+			return true;
+		}
+	}
+
+	/**
+     * Read a stream
+     */
+    function read_stream() {
+        static $a;
+
+        $o_pos = ftell($this->file)-strlen($this->buffer);
+        $o_offset = $this->offset;
+        
+        $this->reset($startpos = $o_pos + $o_offset);
+        $v = "";
+        $prev_buffer = "";
+        $tmp_start = 0;
+        
+        while (($endpos = strpos($prev_buffer.$this->buffer,"endstream")) === false) {
+            $prev_buffer = $this->buffer;
+            $v .= $this->buffer;
+            $tmp_start+=100;
+            $this->reset($startpos + $tmp_start);
+        }
+        $v .= $this->buffer;
+        
+        $v = substr($v,0,$tmp_start+$endpos-(strlen($prev_buffer)));
+
+        $e = strspn($v,"\r\n"); // ensure line breaks in front of the stream
+        $v = substr($v,$e,strlen($v));
+
+        $this->reset($p = $startpos+$tmp_start+$endpos-strlen($prev_buffer)+strlen("endstream")); // reset File after endstream-token
+
+        return $v;
+    }
+    
+    /**
+     * old... very slow!
+     *
+    function read_stream() {
+        $o_pos = ftell($this->file)-strlen($this->buffer);
+        $o_offset = $this->offset;
+
+        $tmp_offset = 0;
+
+        while(($endpos = strpos(substr($this->buffer,$this->offset,$this->length),"endstream")) == false) {
+            $this->increase_length();
+        }
+
+        $v = substr($this->buffer,$this->offset, $endpos);
+        $e = strspn($v,"\r\n"); // ensure line breaks in front of the stream
+        $v = substr($v,$e,strlen($v));
+
+        $this->reset($p = $o_pos+$o_offset+strlen($v)+$e+strlen("endstream")); // reset File after endstream-token
+
+        echo $p."<br>";
+        flush();
+
+        return $v;
+    }  */
+}
+?>