1 /*
2 * Copyright 2016 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License, version 2.0 (the
5 * "License"); you may not use this file except in compliance with the License. You may obtain a
6 * copy of the License at:
7 *
8 * https://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software distributed under the License
11 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
12 * or implied. See the License for the specific language governing permissions and limitations under
13 * the License.
14 */
15
16 package io.netty.handler.codec.redis;
17
18 import io.netty.util.CharsetUtil;
19 import io.netty.util.internal.PlatformDependent;
20
21 /**
22 * Utilities for codec-redis.
23 */
24 final class RedisCodecUtil {
25
26 private RedisCodecUtil() {
27 }
28
29 static byte[] longToAsciiBytes(long value) {
30 return Long.toString(value).getBytes(CharsetUtil.US_ASCII);
31 }
32
33 /**
34 * Returns a {@code short} value using endian order.
35 */
36 static short makeShort(char first, char second) {
37 return PlatformDependent.BIG_ENDIAN_NATIVE_ORDER ?
38 (short) ((second << 8) | first) : (short) ((first << 8) | second);
39 }
40
41 /**
42 * Returns a {@code byte[]} of {@code short} value. This is opposite of {@code makeShort()}.
43 */
44 static byte[] shortToBytes(short value) {
45 byte[] bytes = new byte[2];
46 if (PlatformDependent.BIG_ENDIAN_NATIVE_ORDER) {
47 bytes[1] = (byte) ((value >> 8) & 0xff);
48 bytes[0] = (byte) (value & 0xff);
49 } else {
50 bytes[0] = (byte) ((value >> 8) & 0xff);
51 bytes[1] = (byte) (value & 0xff);
52 }
53 return bytes;
54 }
55 }