iframe-proxy | Sunbelt Computer Software

History

96 lines (83 loc) · 2.46 KB

Raw

* See LICENSE.md for licensing information.

package org.usb4java;

import java.nio.ByteBuffer;

import java.nio.IntBuffer;

import java.nio.LongBuffer;

/**

* Provides some utility methods for working with {@link IntBuffer} and

* {@link ByteBuffer}.

* @author Luca Longinotti (l@longi.li)

public final class BufferUtils

{

/** The native size of the type <code>int</code>. */

private static final int INT_SIZE = Integer.SIZE / Byte.SIZE;

/** The native size of the type <code>long</code>. */

private static final int LONG_SIZE = Long.SIZE / Byte.SIZE;

/**

* Private constructor to prevent instantiation.

private BufferUtils()

{

// Empty

}

/**

* Allocates a new direct {@link ByteBuffer} with the specified size and

* returns it.

* @param bytes

* The size of the new byte buffer.

* @return The allocated direct byte buffer.

public static ByteBuffer allocateByteBuffer(final int bytes)

{

return ByteBuffer.allocateDirect(bytes);

}

/**

* Allocates a new {@link IntBuffer} with space for exactly one integer

* value.

* @return The allocated int buffer.

public static IntBuffer allocateIntBuffer()

{

return ByteBuffer.allocateDirect(INT_SIZE).asIntBuffer();

}

/**

* Allocates a new {@link LongBuffer} with space for exactly one long value.

* @return The allocated long buffer.

public static LongBuffer allocateLongBuffer()

{

return ByteBuffer.allocateDirect(LONG_SIZE).asLongBuffer();

}

/**

* Slices a part of the specified {@link ByteBuffer} into a new byte buffer

* and returns it.

* @param buffer

* The byte buffer to slice data from.

* @param offset

* The offset of the part to slice.

* @param length

* The length of the part to slice.

* @return The new byte buffer with the sliced part.

public static ByteBuffer slice(final ByteBuffer buffer, final int offset,

final int length)

{

final int oldPosition = buffer.position();

final int oldLimit = buffer.limit();

buffer.position(offset);

buffer.limit(offset + length);

final ByteBuffer slice = buffer.slice();

buffer.position(oldPosition);

buffer.limit(oldLimit);

return slice;

}

Sunbelt Computer Software

PL/B Language Development and Support

Navigation Menu

Uh oh!

Sunbelt Computer Software

PL/B Language Development and Support

Uh oh!

FilesExpand file tree

BufferUtils.java

Latest commit

History

BufferUtils.java

File metadata and controls