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Added methods getByte, getShort, etc. to ByteIterator

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This commit is contained in:
Oliver Schulz 2012-05-06 20:47:14 +02:00
parent 15507dff85
commit 844f09a5c7
1 changed files with 64 additions and 0 deletions
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64
akka-actor/src/main/scala/akka/util/ByteIterator.scala
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@ -121,6 +121,70 @@ abstract class ByteIterator extends BufferedIterator[Byte] {
target
}
/**
* Get a single Byte from this iterator. Identical to next().
*/
def getByte = next()
/**
* Get a single Short from this iterator.
*/
def getShort(byteOrder: ByteOrder = ByteOrder.BIG_ENDIAN): Short = {
if (byteOrder == ByteOrder.BIG_ENDIAN)
((next() & 0xff) << 8 | (next() & 0xff) << 0).toShort
else if (byteOrder == ByteOrder.LITTLE_ENDIAN)
((next() & 0xff) << 0 | (next() & 0xff) << 8).toShort
else throw new IllegalArgumentException("Unknown byte order " + byteOrder)
}
/**
* Get a single Int from this iterator.
*/
def getInt(byteOrder: ByteOrder = ByteOrder.BIG_ENDIAN): Int = {
if (byteOrder == ByteOrder.BIG_ENDIAN)
((next() & 0xff) << 24
| (next() & 0xff) << 16
| (next() & 0xff) << 8
| (next() & 0xff) << 0)
else if (byteOrder == ByteOrder.LITTLE_ENDIAN)
((next() & 0xff) << 0
| (next() & 0xff) << 8
| (next() & 0xff) << 16
| (next() & 0xff) << 24)
else throw new IllegalArgumentException("Unknown byte order " + byteOrder)
}
/**
* Get a single Long from this iterator.
*/
def getLong(byteOrder: ByteOrder = ByteOrder.BIG_ENDIAN): Long = {
if (byteOrder == ByteOrder.BIG_ENDIAN)
((next().toLong & 0xff) << 56
| (next().toLong & 0xff) << 48
| (next().toLong & 0xff) << 40
| (next().toLong & 0xff) << 32
| (next().toLong & 0xff) << 24
| (next().toLong & 0xff) << 16
| (next().toLong & 0xff) << 8
| (next().toLong & 0xff) << 0)
else if (byteOrder == ByteOrder.LITTLE_ENDIAN)
((next().toLong & 0xff) << 0
| (next().toLong & 0xff) << 8
| (next().toLong & 0xff) << 16
| (next().toLong & 0xff) << 24
| (next().toLong & 0xff) << 32
| (next().toLong & 0xff) << 40
| (next().toLong & 0xff) << 48
| (next().toLong & 0xff) << 56)
else throw new IllegalArgumentException("Unknown byte order " + byteOrder)
}
def getFloat(byteOrder: ByteOrder = ByteOrder.BIG_ENDIAN): Float =
java.lang.Float.intBitsToFloat(getInt(byteOrder))
def getDouble(byteOrder: ByteOrder = ByteOrder.BIG_ENDIAN): Double =
java.lang.Double.longBitsToDouble(getLong(byteOrder))
/**
* Get a specific number of Bytes from this iterator. In contrast to
* copyToArray, this method will fail if length < n or if (xs.length - offset) < n.