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98 changes: 98 additions & 0 deletions
98
src/main/java/software/amazon/awssdk/crt/checksums/CRC64NVME.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| /** | ||
| * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
| * SPDX-License-Identifier: Apache-2.0. | ||
| */ | ||
| package software.amazon.awssdk.crt.checksums; | ||
|
|
||
| import software.amazon.awssdk.crt.CRT; | ||
| import java.util.zip.Checksum; | ||
|
|
||
| /** | ||
| * CRT implementation of the Java Checksum interface for making CRC64NVME checksum calculations | ||
| */ | ||
| public class CRC64NVME implements Checksum, Cloneable { | ||
| static { | ||
| new CRT(); | ||
| }; | ||
|
|
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| private long value = 0; | ||
|
|
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| /** | ||
| * Default constructor | ||
| */ | ||
| public CRC64NVME() { | ||
| } | ||
|
|
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| private CRC64NVME(long value) { | ||
| this.value = value; | ||
| } | ||
|
|
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| @Override | ||
| public Object clone() { | ||
| return new CRC64NVME(value); | ||
| } | ||
|
|
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| /** | ||
| * Returns the current checksum value. | ||
| * | ||
| * @return the current checksum value. | ||
| */ | ||
| @Override | ||
| public long getValue() { | ||
| return value; | ||
| } | ||
|
|
||
| /** | ||
| * Resets the checksum to its initial value. | ||
| */ | ||
| @Override | ||
| public void reset() { | ||
| value = 0; | ||
| } | ||
|
|
||
| /** | ||
| * Updates the current checksum with the specified array of bytes. | ||
| * | ||
| * @param b the byte array to update the checksum with | ||
| * @param off the starting offset within b of the data to use | ||
| * @param len the number of bytes to use in the update | ||
| */ | ||
| @Override | ||
| public void update(byte[] b, int off, int len) { | ||
| if (b == null) { | ||
| throw new NullPointerException(); | ||
| } | ||
| if (off < 0 || len < 0 || off > b.length - len) { | ||
| throw new ArrayIndexOutOfBoundsException(); | ||
| } | ||
| value = crc64nvme(b, value, off, len); | ||
| } | ||
|
|
||
| /** | ||
| * Updates the current checksum with the specified array of bytes. | ||
| * | ||
| * @param b the byte array to update the checksum with | ||
| */ | ||
| public void update(byte[] b) { | ||
| update(b, 0, b.length); | ||
| } | ||
|
|
||
| /** | ||
| * Updates the current checksum with the specified byte. | ||
| * | ||
| * @param b the byte to update the checksum with | ||
| */ | ||
| @Override | ||
| public void update(int b) { | ||
| if (b < 0 || b > 0xff) { | ||
| throw new IllegalArgumentException(); | ||
| } | ||
| byte[] buf = { (byte) (b & 0x000000ff) }; | ||
| this.update(buf); | ||
| } | ||
|
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||
| /******************************************************************************* | ||
| * native methods | ||
| ******************************************************************************/ | ||
| private static native long crc64nvme(byte[] input, long previous, int offset, int length);; | ||
| } |
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