/**
* Return an unsigned byte from the data.
*
* @param
* int the offset into the data. An offset of zero will
* return the first byte in the current allowed window. The last
* valid offset is equal to {@link getSize()}-1. Invalid offsets
* will result in a {@link PelDataWindowOffsetException} being
* thrown.
*
* @return int the unsigned byte found at offset.
*/
public function getByte($o = 0)
{
/*
* Validate the offset --- this throws an exception if offset is
* out of range.
*/
$this->validateOffset($o);
/* Translate the offset into an offset into the data. */
$o += $this->start;
/* Return an unsigned byte. */
return PelConvert::bytesToByte($this->data, $o);
}
function testByte()
{
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 0), 0x0);
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 1), 0x0);
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 2), 0x0);
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 3), 0x0);
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 4), 0x1);
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 5), 0x23);
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 6), 0x45);
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 7), 0x67);
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 8), 0x89);
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 9), 0xab);
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 10), 0xcd);
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 11), 0xef);
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 12), 0xff);
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 13), 0xff);
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 14), 0xff);
$this->assertEqual(PelConvert::bytesToByte($this->bytes, 15), 0xff);
}
