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<?php // // FPDI - Version 1.2.1 // // Copyright 2004-2008 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 $stack; // Constructor function pdf_context($f) { $this->file = $f; $this->reset(); } // Optionally move the file // pointer to a new location // and reset the buffered data function reset($pos = null, $l = 100) { if (!is_null ($pos)) { fseek ($this->file, $pos); } $this->buffer = $l > 0 ? fread($this->file, $l) : ''; $this->length = strlen($this->buffer); if ($this->length < $l) $this->increase_length($l - $this->length); $this->offset = 0; $this->stack = array(); } // Make sure that there is at least one // character beyond the current offset in // the buffer to prevent the tokenizer // from attempting to access data that does // not exist function ensure_content() { if ($this->offset >= $this->length - 1) { return $this->increase_length(); } else { return true; } } // Forcefully read more data into the buffer function increase_length($l=100) { if (feof($this->file)) { return false; } else { $totalLength = $this->length + $l; do { $this->buffer .= fread($this->file, $totalLength-$this->length); } while ((($this->length = strlen($this->buffer)) != $totalLength) && !feof($this->file)); return true; } } }
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