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/TBase64Utils.cs b/lib/netstd/Thrift/Protocol/Utilities/TBase64Utils.cs
new file mode 100644
index 0000000..90b8f88
--- /dev/null
+++ b/lib/netstd/Thrift/Protocol/Utilities/TBase64Utils.cs
@@ -0,0 +1,101 @@
+// 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.
+
+using System;
+
+namespace Thrift.Protocol.Utilities
+{
+ // ReSharper disable once InconsistentNaming
+ internal static class TBase64Utils
+ {
+ //TODO: Constants
+ //TODO: Check for args
+ //TODO: Unitests
+
+ internal const string EncodeTable = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+ private static readonly int[] DecodeTable =
+ {
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
+ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
+ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
+ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
+ -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
+ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
+ };
+
+ internal static void Encode(byte[] src, int srcOff, int len, byte[] dst, int dstOff)
+ {
+ if (src == null)
+ {
+ throw new ArgumentNullException(nameof(src));
+ }
+
+ dst[dstOff] = (byte) EncodeTable[(src[srcOff] >> 2) & 0x3F];
+
+ if (len == 3)
+ {
+ dst[dstOff + 1] = (byte) EncodeTable[((src[srcOff] << 4) & 0x30) | ((src[srcOff + 1] >> 4) & 0x0F)];
+ dst[dstOff + 2] = (byte) EncodeTable[((src[srcOff + 1] << 2) & 0x3C) | ((src[srcOff + 2] >> 6) & 0x03)];
+ dst[dstOff + 3] = (byte) EncodeTable[src[srcOff + 2] & 0x3F];
+ }
+ else if (len == 2)
+ {
+ dst[dstOff + 1] = (byte) EncodeTable[((src[srcOff] << 4) & 0x30) | ((src[srcOff + 1] >> 4) & 0x0F)];
+ dst[dstOff + 2] = (byte) EncodeTable[(src[srcOff + 1] << 2) & 0x3C];
+ }
+ else
+ {
+ // len == 1
+ dst[dstOff + 1] = (byte) EncodeTable[(src[srcOff] << 4) & 0x30];
+ }
+ }
+
+ internal static void Decode(byte[] src, int srcOff, int len, byte[] dst, int dstOff)
+ {
+ if (src == null)
+ {
+ throw new ArgumentNullException(nameof(src));
+ }
+
+ dst[dstOff] = (byte) ((DecodeTable[src[srcOff] & 0x0FF] << 2) | (DecodeTable[src[srcOff + 1] & 0x0FF] >> 4));
+
+ if (len > 2)
+ {
+ dst[dstOff + 1] =
+ (byte)
+ (((DecodeTable[src[srcOff + 1] & 0x0FF] << 4) & 0xF0) | (DecodeTable[src[srcOff + 2] & 0x0FF] >> 2));
+ if (len > 3)
+ {
+ dst[dstOff + 2] =
+ (byte)
+ (((DecodeTable[src[srcOff + 2] & 0x0FF] << 6) & 0xC0) | DecodeTable[src[srcOff + 3] & 0x0FF]);
+ }
+ }
+ }
+ }
+}
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