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Diffstat (limited to '')
| -rw-r--r-- | src/jaegertracing/thrift/lib/netcore/Thrift/Protocols/Utilities/TBase64Helper.cs | 101 |
1 files changed, 101 insertions, 0 deletions
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]); + } + } + } + } +}
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