hunt.database.driver.postgresql.impl.util.UTF8StringEndDetector source code

1 /*
2  * Copyright (C) 2018 Julien Viet
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * 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,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  */
17 module hunt.database.driver.postgresql.impl.util.UTF8StringEndDetector;
18 
19 import hunt.net.buffer.ByteProcessor;
20 
21 // /**
22 //  * A processor that detects the end of a well formed UTF8 string, starting end ending with a {@code "}.
23 //  * <p/>
24 //  * It process all bytes until it finds the ending {@code "}.
25 //  */
26 // class UTF8StringEndDetector implements ByteProcessor {
27 
28 //   private boolean inString;
29 //   private boolean escaped;
30 
31 //   override
32 //   boolean process(byte value) {
33 //     boolean wasEscaped = escaped;
34 //     escaped = false;
35 //     // In UTF-8 low ASCII have their 8th bit == 0
36 //     if ((value & 0b10000000) == 0) {
37 //       switch (value) {
38 //         case '"':
39 //           if (!wasEscaped) {
40 //             if (inString) {
41 //               return false;
42 //             } else {
43 //               inString = true;
44 //             }
45 //           }
46 //           break;
47 //         case '\\':
48 //           if (inString) {
49 //             escaped = true;
50 //           }
51 //           break;
52 //       }
53 //     }
54 //     return true;
55 //   }
56 // }