From 19fcec84d8d7d21e796c7624e521b60d28ee21ed Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:45:59 +0200
Subject: Adding upstream version 16.2.11+ds.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../Thrift/Protocols/Utilities/TBase64Helper.cs    | 101 +++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 src/jaegertracing/thrift/lib/netcore/Thrift/Protocols/Utilities/TBase64Helper.cs

(limited to 'src/jaegertracing/thrift/lib/netcore/Thrift/Protocols/Utilities/TBase64Helper.cs')

diff --git a/src/jaegertracing/thrift/lib/netcore/Thrift/Protocols/Utilities/TBase64Helper.cs b/src/jaegertracing/thrift/lib/netcore/Thrift/Protocols/Utilities/TBase64Helper.cs
new file mode 100644
index 000000000..7eff5e181
--- /dev/null
+++ b/src/jaegertracing/thrift/lib/netcore/Thrift/Protocols/Utilities/TBase64Helper.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.Protocols.Utilities
+{
+    // ReSharper disable once InconsistentNaming
+    internal static class TBase64Helper
+    {
+        //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]);
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
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