com.julienviet.pgclient.impl.StringLongSequence Maven / Gradle / Ivy
/*
* Copyright (C) 2017 Julien Viet
*
* 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 com.julienviet.pgclient.impl;
public class StringLongSequence {
private short count;
public long next() {
short val = count++;
long next = 0x30_30_30_00_00_00_00_00L;
next |= toHex(val >> 12 & 0xF) << 32;
next |= toHex(val >> 8 & 0xF) << 24;
next |= toHex(val >> 4 & 0xF) << 16;
next |= toHex(val >> 0 & 0xF) << 8;
return next;
}
private static long toHex(int c) {
if (c < 10) {
return (byte)('0' + c);
} else {
return (byte)('A' + c - 10);
}
}
}