org.iq80.snappy.SlowMemory Maven / Gradle / Ivy
/*
* Copyright (C) 2011 the original author or authors.
* See the notice.md file distributed with this work for additional
* information regarding copyright ownership.
*
* 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.
*/
package org.iq80.snappy;
class SlowMemory implements Memory
{
@Override
public boolean fastAccessSupported()
{
return false;
}
@Override
public int lookupShort(short[] data, int index)
{
return data[index] & 0xFFFF;
}
@Override
public int loadByte(byte[] data, int index)
{
return data[index] & 0xFF;
}
@Override
public int loadInt(byte[] data, int index)
{
return (data[index] & 0xff) |
(data[index + 1] & 0xff) << 8 |
(data[index + 2] & 0xff) << 16 |
(data[index + 3] & 0xff) << 24;
}
@Override
public void copyLong(byte[] src, int srcIndex, byte[] dest, int destIndex)
{
for (int i = 0; i < 8; i++) {
dest[destIndex + i] = src[srcIndex + i];
}
}
@Override
public long loadLong(byte[] data, int index)
{
return (data[index] & 0xffL) |
(data[index + 1] & 0xffL) << 8 |
(data[index + 2] & 0xffL) << 16 |
(data[index + 3] & 0xffL) << 24 |
(data[index + 4] & 0xffL) << 32 |
(data[index + 5] & 0xffL) << 40 |
(data[index + 6] & 0xffL) << 48 |
(data[index + 7] & 0xffL) << 56;
}
@Override
public void copyMemory(byte[] input, int inputIndex, byte[] output, int outputIndex, int length)
{
System.arraycopy(input, inputIndex, output, outputIndex, length);
}
}