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comparison Implab/Formats/Json/StringTranslator.cs @ 232:133ba4444acc v2

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Слияние
author cin
date Thu, 21 Sep 2017 01:14:27 +0300
parents 3e26338eb977
children
comparison
equal deleted inserted replaced
231:3eaa9372c754 232:133ba4444acc
1 using Implab;
2 using Implab.Formats;
3 using System;
4 using System.Collections.Generic;
5 using System.Diagnostics;
6 using System.Linq;
7 using System.Text;
8 using System.Threading.Tasks;
9
10 namespace Implab.Formats.Json {
11 /// <summary>
12 /// Класс для преобразования экранированной строки JSON
13 /// </summary>
14 static class StringTranslator {
15 static readonly char[] _escMap;
16 static readonly int[] _hexMap;
17
18 static StringTranslator() {
19 var chars = new char[] { 'b', 'f', 't', 'r', 'n', '\\', '/', '"' };
20 var vals = new char[] { '\b', '\f', '\t', '\r', '\n', '\\', '/', '"' };
21
22 _escMap = new char[chars.Max() + 1];
23
24 for (int i = 0; i < chars.Length; i++)
25 _escMap[chars[i]] = vals[i];
26
27 var hexs = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'A', 'B', 'C', 'D', 'E', 'F' };
28 var ints = new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 10, 11, 12, 13, 14, 15 };
29
30 _hexMap = new int[hexs.Max() + 1];
31
32 for (int i = 0; i < hexs.Length; i++)
33 _hexMap[hexs[i]] = ints[i];
34
35 }
36
37 internal static char TranslateEscapedChar(char symbol) {
38 return _escMap[symbol];
39 }
40
41 internal static char TranslateHexUnicode(char[] symbols, int offset) {
42 Debug.Assert(symbols != null);
43 Debug.Assert(symbols.Length - offset >= 4);
44
45 int value = (_hexMap[symbols[offset]] << 12)
46 | (_hexMap[symbols[offset + 1]] << 8)
47 | (_hexMap[symbols[offset + 2]] << 4)
48 | (_hexMap[symbols[offset + 3]]);
49 return (char)value;
50 }
51 }
52 }