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Diffstat (limited to 'third_party/protobuf/3.4.0/csharp/src/Google.Protobuf/WireFormat.cs')
| -rw-r--r-- | third_party/protobuf/3.4.0/csharp/src/Google.Protobuf/WireFormat.cs | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/third_party/protobuf/3.4.0/csharp/src/Google.Protobuf/WireFormat.cs b/third_party/protobuf/3.4.0/csharp/src/Google.Protobuf/WireFormat.cs new file mode 100644 index 0000000000..e884da5205 --- /dev/null +++ b/third_party/protobuf/3.4.0/csharp/src/Google.Protobuf/WireFormat.cs @@ -0,0 +1,104 @@ +#region Copyright notice and license +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// https://developers.google.com/protocol-buffers/ +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +#endregion + +namespace Google.Protobuf +{ + /// <summary> + /// This class is used internally by the Protocol Buffer Library and generated + /// message implementations. It is public only for the sake of those generated + /// messages. Others should not use this class directly. + /// <para> + /// This class contains constants and helper functions useful for dealing with + /// the Protocol Buffer wire format. + /// </para> + /// </summary> + public static class WireFormat + { + /// <summary> + /// Wire types within protobuf encoding. + /// </summary> + public enum WireType : uint + { + /// <summary> + /// Variable-length integer. + /// </summary> + Varint = 0, + /// <summary> + /// A fixed-length 64-bit value. + /// </summary> + Fixed64 = 1, + /// <summary> + /// A length-delimited value, i.e. a length followed by that many bytes of data. + /// </summary> + LengthDelimited = 2, + /// <summary> + /// A "start group" value - not supported by this implementation. + /// </summary> + StartGroup = 3, + /// <summary> + /// An "end group" value - not supported by this implementation. + /// </summary> + EndGroup = 4, + /// <summary> + /// A fixed-length 32-bit value. + /// </summary> + Fixed32 = 5 + } + + private const int TagTypeBits = 3; + private const uint TagTypeMask = (1 << TagTypeBits) - 1; + + /// <summary> + /// Given a tag value, determines the wire type (lower 3 bits). + /// </summary> + public static WireType GetTagWireType(uint tag) + { + return (WireType) (tag & TagTypeMask); + } + + /// <summary> + /// Given a tag value, determines the field number (the upper 29 bits). + /// </summary> + public static int GetTagFieldNumber(uint tag) + { + return (int) tag >> TagTypeBits; + } + + /// <summary> + /// Makes a tag value given a field number and wire type. + /// </summary> + public static uint MakeTag(int fieldNumber, WireType wireType) + { + return (uint) (fieldNumber << TagTypeBits) | (uint) wireType; + } + } +}
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