THRIFT-4723 Consolidate C#/netcore into new netstd language target
Client: netstd
Patch: Jens Geyer

This closes #1710
diff --git a/lib/netstd/Thrift/Protocol/Utilities/TJsonProtocolConstants.cs b/lib/netstd/Thrift/Protocol/Utilities/TJsonProtocolConstants.cs
new file mode 100644
index 0000000..6cc1302
--- /dev/null
+++ b/lib/netstd/Thrift/Protocol/Utilities/TJsonProtocolConstants.cs
@@ -0,0 +1,61 @@
+// Licensed to the Apache Software Foundation(ASF) under one
+// or more contributor license agreements.See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+// 
+//     http://www.apache.org/licenses/LICENSE-2.0
+// 
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+namespace Thrift.Protocol.Utilities
+{
+    // ReSharper disable once InconsistentNaming
+    public static class TJSONProtocolConstants
+    {
+        //TODO Check for performance for reusing ImmutableArray from System.Collections.Immutable (https://blogs.msdn.microsoft.com/dotnet/2013/06/24/please-welcome-immutablearrayt/)
+        // can be possible to get better performance and also better GC
+
+        public static readonly byte[] Comma = {(byte) ','};
+        public static readonly byte[] Colon = {(byte) ':'};
+        public static readonly byte[] LeftBrace = {(byte) '{'};
+        public static readonly byte[] RightBrace = {(byte) '}'};
+        public static readonly byte[] LeftBracket = {(byte) '['};
+        public static readonly byte[] RightBracket = {(byte) ']'};
+        public static readonly byte[] Quote = {(byte) '"'};
+        public static readonly byte[] Backslash = {(byte) '\\'};
+
+        public static readonly byte[] JsonCharTable =
+        {
+            0, 0, 0, 0, 0, 0, 0, 0, (byte) 'b', (byte) 't', (byte) 'n', 0, (byte) 'f', (byte) 'r', 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            1, 1, (byte) '"', 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
+        };
+
+        public static readonly char[] EscapeChars = "\"\\/bfnrt".ToCharArray();
+        public static readonly byte[] EscapeCharValues = {(byte) '"', (byte) '\\', (byte) '/', (byte) '\b', (byte) '\f', (byte) '\n', (byte) '\r', (byte) '\t'};
+        public static readonly byte[] EscSequences = {(byte) '\\', (byte) 'u', (byte) '0', (byte) '0'};
+
+        public static class TypeNames
+        {
+            public static readonly byte[] NameBool = { (byte)'t', (byte)'f' };
+            public static readonly byte[] NameByte = { (byte)'i', (byte)'8' };
+            public static readonly byte[] NameI16 = { (byte)'i', (byte)'1', (byte)'6' };
+            public static readonly byte[] NameI32 = { (byte)'i', (byte)'3', (byte)'2' };
+            public static readonly byte[] NameI64 = { (byte)'i', (byte)'6', (byte)'4' };
+            public static readonly byte[] NameDouble = { (byte)'d', (byte)'b', (byte)'l' };
+            public static readonly byte[] NameStruct = { (byte)'r', (byte)'e', (byte)'c' };
+            public static readonly byte[] NameString = { (byte)'s', (byte)'t', (byte)'r' };
+            public static readonly byte[] NameMap = { (byte)'m', (byte)'a', (byte)'p' };
+            public static readonly byte[] NameList = { (byte)'l', (byte)'s', (byte)'t' };
+            public static readonly byte[] NameSet = { (byte)'s', (byte)'e', (byte)'t' };
+        }
+    }
+}
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