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RocksDB fat jar that contains .so files for linux64, jnilib files
for Mac OSX, and a .dll for Windows x64. It contains the Yamcs merge operator for the Parameter Archive
// Copyright (c) Meta Platforms, Inc. and affiliates.
//
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
package org.rocksdb.util;
import java.nio.ByteBuffer;
import static java.nio.charset.StandardCharsets.UTF_8;
public class ByteUtil {
/**
* Convert a String to a UTF-8 byte array.
*
* @param str the string
*
* @return the byte array.
*/
public static byte[] bytes(final String str) {
return str.getBytes(UTF_8);
}
/**
* Compares the first {@code count} bytes of two areas of memory. Returns
* zero if they are the same, a value less than zero if {@code x} is
* lexically less than {@code y}, or a value greater than zero if {@code x}
* is lexically greater than {@code y}. Note that lexical order is determined
* as if comparing unsigned char arrays.
*
* Similar to memcmp.c.
*
* @param x the first value to compare with
* @param y the second value to compare against
* @param count the number of bytes to compare
*
* @return the result of the comparison
*/
public static int memcmp(final ByteBuffer x, final ByteBuffer y,
final int count) {
for (int idx = 0; idx < count; idx++) {
final int aa = x.get(idx) & 0xff;
final int bb = y.get(idx) & 0xff;
if (aa != bb) {
return aa - bb;
}
}
return 0;
}
}