--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Implab/Formats/Json/StringTranslator.cs	Thu Oct 05 09:24:49 2017 +0300
@@ -0,0 +1,52 @@
+using Implab;
+using Implab.Formats;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Implab.Formats.Json {
+    /// <summary>
+    /// Класс для преобразования экранированной строки JSON
+    /// </summary>
+    static class StringTranslator {
+        static readonly char[] _escMap;
+        static readonly int[] _hexMap;
+
+        static StringTranslator() {
+            var chars = new char[] { 'b', 'f', 't', 'r', 'n', '\\', '/', '"' };
+            var vals = new char[] { '\b', '\f', '\t', '\r', '\n', '\\', '/', '"' };
+
+            _escMap = new char[chars.Max() + 1];
+
+            for (int i = 0; i < chars.Length; i++)
+                _escMap[chars[i]] = vals[i];
+
+            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' };
+            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 };
+
+            _hexMap = new int[hexs.Max() + 1];
+
+            for (int i = 0; i < hexs.Length; i++)
+                _hexMap[hexs[i]] = ints[i];
+
+        }
+
+        internal static char TranslateEscapedChar(char symbol) {
+            return _escMap[symbol];
+        }
+
+        internal static char TranslateHexUnicode(char[] symbols, int offset) {
+            Debug.Assert(symbols != null);
+            Debug.Assert(symbols.Length - offset >= 4);
+
+            int value = (_hexMap[symbols[offset]] << 12)
+                | (_hexMap[symbols[offset + 1]] << 8)
+                | (_hexMap[symbols[offset + 2]] << 4)
+                | (_hexMap[symbols[offset + 3]]);
+            return (char)value;
+        }
+    }
+}