yagsdisasm/Input/Input_BIN.php

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2016-05-26 03:34:19 +00:00
<?php
/**
* Input_BIN - YAGSDisasm Input byte device for binary blobs
*
*/
class Input_BIN
{
// have we been initialized yet?
private $is_initialized = false;
// source filename
private $source_filename;
// volume length in bytes
private $total_bytes;
// our file descriptor
private $fp;
public function __construct( $filename )
{
$fp = fopen( $filename, 'r' );
if( !$fp )
{
throw new Exception( 'Input_BIN: Unable to open source file '.$filename );
}
// source filename
$this->source_filename = $filename;
// bytes of disk data
$this->total_bytes = filesize( $filename );
$this->is_initialized = true;
$this->fp = $fp;
}
/**
* getBytes( $starting_byte, $num_bytes ) - Retrieve $num_bytes bytes from the file, starting at $starting_byte
* @param $starting_byte int, $num_bytes int
* @return $data str
*/
public function getBytes( $starting_byte, $num_bytes )
{
if( $num_bytes == 'all' )
{
return file_get_contents( $this->source_filename );
}
fseek( $fp, $starting_byte, SEEK_SET );
$data = '';
$data .= fread( $fp, $num_bytes );
return $data;
}
/**
* printInfo() - Print some information about this binary image
*/
public function printInfo()
{
echo "Source Filename: ".$this->source_filename."\n";
echo " Image Format: Binary\n";
echo " Total Bytes: ".$this->total_bytes."\n";
}
}