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/**
* Author: Sven Gothel <sgothel@jausoft.com>
* Copyright (c) 2020 Gothel Software e.K.
* Copyright (c) 2020 ZAFENA AB
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package org.tinyb;
public class BluetoothUtils {
/**
* Returns current monotonic time in milliseconds.
*/
public static native long getCurrentMilliseconds();
/**
* Returns a hex string representation
*
* @param bytes the byte array to represent
* @param lsbFirst if true, orders LSB left -> MSB right, usual for byte streams.
* Otherwise orders MSB left -> LSB right, usual for readable integer values.
* @param leading0X if true, prepends the value identifier '0x'
*/
public static String bytesHexString(final byte[] bytes, final boolean lsbFirst, final boolean leading0X) {
final char[] hexChars;
final int offset;
if( leading0X ) {
offset = 2;
hexChars = new char[2 + bytes.length * 2];
hexChars[0] = '0';
hexChars[1] = 'x';
} else {
offset = 0;
hexChars = new char[bytes.length * 2];
}
if( lsbFirst ) {
// LSB left -> MSB right
for (int j = 0; j < bytes.length; j++) {
final int v = bytes[j] & 0xFF;
hexChars[offset + j * 2] = HEX_ARRAY[v >>> 4];
hexChars[offset + j * 2 + 1] = HEX_ARRAY[v & 0x0F];
}
} else {
// MSB left -> LSB right
for (int j = bytes.length-1; j >= 0; j--) {
final int v = bytes[j] & 0xFF;
hexChars[offset + j * 2] = HEX_ARRAY[v >>> 4];
hexChars[offset + j * 2 + 1] = HEX_ARRAY[v & 0x0F];
}
}
return new String(hexChars);
}
private static final char[] HEX_ARRAY = "0123456789ABCDEF".toCharArray();
/**
* Returns all valid consecutive UTF-8 characters within buffer
* in the range offset -> size or until EOS.
* <p>
* In case a non UTF-8 character has been detected,
* the content will be cut off and the decoding loop ends.
* </p>
*/
public static native String getUTF8String(final byte[] buffer, final int offset, final int size);
}
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