hunt.net.buffer.HeapByteBufUtil source code

1 /*
2  * Copyright 2015 The Netty Project
3  *
4  * The Netty Project licenses this file to you under the Apache License,
5  * version 2.0 (the "License"); you may not use this file except in compliance
6  * with the License. You may obtain a copy of the License at:
7  *
8  *   http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13  * License for the specific language governing permissions and limitations
14  * under the License.
15  */
16 module hunt.net.buffer.HeapByteBufUtil;
17 
18 /**
19  * Utility class for heap buffers.
20  */
21 final class HeapByteBufUtil {
22 
23     static byte getByte(byte[] memory, int index) {
24         return memory[index];
25     }
26 
27     static short getShort(byte[] memory, int index) {
28         return cast(short) (memory[index] << 8 | memory[index + 1] & 0xFF);
29     }
30 
31     static short getShortLE(byte[] memory, int index) {
32         return cast(short) (memory[index] & 0xff | memory[index + 1] << 8);
33     }
34 
35     static int getUnsignedMedium(byte[] memory, int index) {
36         return  (memory[index]     & 0xff) << 16 |
37                 (memory[index + 1] & 0xff) <<  8 |
38                 memory[index + 2] & 0xff;
39     }
40 
41     static int getUnsignedMediumLE(byte[] memory, int index) {
42         return  memory[index]     & 0xff         |
43                 (memory[index + 1] & 0xff) <<  8 |
44                 (memory[index + 2] & 0xff) << 16;
45     }
46 
47     static int getInt(byte[] memory, int index) {
48         return  (memory[index]     & 0xff) << 24 |
49                 (memory[index + 1] & 0xff) << 16 |
50                 (memory[index + 2] & 0xff) <<  8 |
51                 memory[index + 3] & 0xff;
52     }
53 
54     static int getIntLE(byte[] memory, int index) {
55         return  memory[index]      & 0xff        |
56                 (memory[index + 1] & 0xff) << 8  |
57                 (memory[index + 2] & 0xff) << 16 |
58                 (memory[index + 3] & 0xff) << 24;
59     }
60 
61     static long getLong(byte[] memory, int index) {
62         return  (cast(long) memory[index]     & 0xff) << 56 |
63                 (cast(long) memory[index + 1] & 0xff) << 48 |
64                 (cast(long) memory[index + 2] & 0xff) << 40 |
65                 (cast(long) memory[index + 3] & 0xff) << 32 |
66                 (cast(long) memory[index + 4] & 0xff) << 24 |
67                 (cast(long) memory[index + 5] & 0xff) << 16 |
68                 (cast(long) memory[index + 6] & 0xff) <<  8 |
69                 cast(long) memory[index + 7] & 0xff;
70     }
71 
72     static long getLongLE(byte[] memory, int index) {
73         return  cast(long) memory[index]      & 0xff        |
74                 (cast(long) memory[index + 1] & 0xff) <<  8 |
75                 (cast(long) memory[index + 2] & 0xff) << 16 |
76                 (cast(long) memory[index + 3] & 0xff) << 24 |
77                 (cast(long) memory[index + 4] & 0xff) << 32 |
78                 (cast(long) memory[index + 5] & 0xff) << 40 |
79                 (cast(long) memory[index + 6] & 0xff) << 48 |
80                 (cast(long) memory[index + 7] & 0xff) << 56;
81     }
82 
83     static void setByte(byte[] memory, int index, int value) {
84         memory[index] = cast(byte) value;
85     }
86 
87     static void setShort(byte[] memory, int index, int value) {
88         memory[index]     = cast(byte) (value >>> 8);
89         memory[index + 1] = cast(byte) value;
90     }
91 
92     static void setShortLE(byte[] memory, int index, int value) {
93         memory[index]     = cast(byte) value;
94         memory[index + 1] = cast(byte) (value >>> 8);
95     }
96 
97     static void setMedium(byte[] memory, int index, int value) {
98         memory[index]     = cast(byte) (value >>> 16);
99         memory[index + 1] = cast(byte) (value >>> 8);
100         memory[index + 2] = cast(byte) value;
101     }
102 
103     static void setMediumLE(byte[] memory, int index, int value) {
104         memory[index]     = cast(byte) value;
105         memory[index + 1] = cast(byte) (value >>> 8);
106         memory[index + 2] = cast(byte) (value >>> 16);
107     }
108 
109     static void setInt(byte[] memory, int index, int value) {
110         memory[index]     = cast(byte) (value >>> 24);
111         memory[index + 1] = cast(byte) (value >>> 16);
112         memory[index + 2] = cast(byte) (value >>> 8);
113         memory[index + 3] = cast(byte) value;
114     }
115 
116     static void setIntLE(byte[] memory, int index, int value) {
117         memory[index]     = cast(byte) value;
118         memory[index + 1] = cast(byte) (value >>> 8);
119         memory[index + 2] = cast(byte) (value >>> 16);
120         memory[index + 3] = cast(byte) (value >>> 24);
121     }
122 
123     static void setLong(byte[] memory, int index, long value) {
124         memory[index]     = cast(byte) (value >>> 56);
125         memory[index + 1] = cast(byte) (value >>> 48);
126         memory[index + 2] = cast(byte) (value >>> 40);
127         memory[index + 3] = cast(byte) (value >>> 32);
128         memory[index + 4] = cast(byte) (value >>> 24);
129         memory[index + 5] = cast(byte) (value >>> 16);
130         memory[index + 6] = cast(byte) (value >>> 8);
131         memory[index + 7] = cast(byte) value;
132     }
133 
134     static void setLongLE(byte[] memory, int index, long value) {
135         memory[index]     = cast(byte) value;
136         memory[index + 1] = cast(byte) (value >>> 8);
137         memory[index + 2] = cast(byte) (value >>> 16);
138         memory[index + 3] = cast(byte) (value >>> 24);
139         memory[index + 4] = cast(byte) (value >>> 32);
140         memory[index + 5] = cast(byte) (value >>> 40);
141         memory[index + 6] = cast(byte) (value >>> 48);
142         memory[index + 7] = cast(byte) (value >>> 56);
143     }
144 
145     private this() { }
146 }