From 59eeebee870332ea2b9085688ba524c69311f662 Mon Sep 17 00:00:00 2001 From: Jon Skeet Date: Fri, 17 Jul 2015 08:26:04 +0100 Subject: First pass at the big rename from ProtocolBuffers to Google.Protobuf. We'll see what I've missed when CI fails... --- csharp/src/Google.Protobuf/WireFormat.cs | 162 +++++++++++++++++++++++++++++++ 1 file changed, 162 insertions(+) create mode 100644 csharp/src/Google.Protobuf/WireFormat.cs (limited to 'csharp/src/Google.Protobuf/WireFormat.cs') diff --git a/csharp/src/Google.Protobuf/WireFormat.cs b/csharp/src/Google.Protobuf/WireFormat.cs new file mode 100644 index 00000000..c1712daa --- /dev/null +++ b/csharp/src/Google.Protobuf/WireFormat.cs @@ -0,0 +1,162 @@ +#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 + +using System; +using Google.Protobuf.Reflection; + +namespace Google.Protobuf +{ + /// + /// 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. + /// + /// This class contains constants and helper functions useful for dealing with + /// the Protocol Buffer wire format. + /// + /// + public static class WireFormat + { + #region Fixed sizes. + + // TODO(jonskeet): Move these somewhere else. They're messy. Consider making FieldType a smarter kind of enum + internal const int Fixed32Size = 4; + internal const int Fixed64Size = 8; + internal const int SFixed32Size = 4; + internal const int SFixed64Size = 8; + internal const int FloatSize = 4; + internal const int DoubleSize = 8; + internal const int BoolSize = 1; + + #endregion + + public enum WireType : uint + { + Varint = 0, + Fixed64 = 1, + LengthDelimited = 2, + StartGroup = 3, + EndGroup = 4, + Fixed32 = 5 + } + + private const int TagTypeBits = 3; + private const uint TagTypeMask = (1 << TagTypeBits) - 1; + + /// + /// Given a tag value, determines the wire type (lower 3 bits). + /// + public static WireType GetTagWireType(uint tag) + { + return (WireType) (tag & TagTypeMask); + } + + public static bool IsEndGroupTag(uint tag) + { + return (WireType) (tag & TagTypeMask) == WireType.EndGroup; + } + + /// + /// Given a tag value, determines the field number (the upper 29 bits). + /// + public static int GetTagFieldNumber(uint tag) + { + return (int) tag >> TagTypeBits; + } + + /// + /// Makes a tag value given a field number and wire type. + /// + public static uint MakeTag(int fieldNumber, WireType wireType) + { + return (uint) (fieldNumber << TagTypeBits) | (uint) wireType; + } + + public static uint MakeTag(FieldDescriptor field) + { + return MakeTag(field.FieldNumber, GetWireType(field)); + } + + /// + /// Returns the wire type for the given field descriptor. This differs + /// from GetWireType(FieldType) for packed repeated fields. + /// + internal static WireType GetWireType(FieldDescriptor descriptor) + { + return descriptor.IsPacked ? WireType.LengthDelimited : GetWireType(descriptor.FieldType); + } + + /// + /// Converts a field type to its wire type. Done with a switch for the sake + /// of speed - this is significantly faster than a dictionary lookup. + /// + public static WireType GetWireType(FieldType fieldType) + { + switch (fieldType) + { + case FieldType.Double: + return WireType.Fixed64; + case FieldType.Float: + return WireType.Fixed32; + case FieldType.Int64: + case FieldType.UInt64: + case FieldType.Int32: + return WireType.Varint; + case FieldType.Fixed64: + return WireType.Fixed64; + case FieldType.Fixed32: + return WireType.Fixed32; + case FieldType.Bool: + return WireType.Varint; + case FieldType.String: + return WireType.LengthDelimited; + case FieldType.Group: + return WireType.StartGroup; + case FieldType.Message: + case FieldType.Bytes: + return WireType.LengthDelimited; + case FieldType.UInt32: + return WireType.Varint; + case FieldType.SFixed32: + return WireType.Fixed32; + case FieldType.SFixed64: + return WireType.Fixed64; + case FieldType.SInt32: + case FieldType.SInt64: + case FieldType.Enum: + return WireType.Varint; + default: + throw new ArgumentOutOfRangeException("fieldType", "No such field type"); + } + } + } +} \ No newline at end of file -- cgit v1.2.3