Squashed 'third_party/protobuf/' content from commit e35e248
Change-Id: I6cbe123d09fe50fdcad0e51466665daeee7433c7
git-subtree-dir: third_party/protobuf
git-subtree-split: e35e24800fb8d694bdeea5fd63dc7d1b14d68723
diff --git a/csharp/src/Google.Protobuf/WireFormat.cs b/csharp/src/Google.Protobuf/WireFormat.cs
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+#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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