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/JsonToken.cs b/csharp/src/Google.Protobuf/JsonToken.cs
new file mode 100644
index 0000000..6c0138c
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+++ b/csharp/src/Google.Protobuf/JsonToken.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
+
+using System;
+
+namespace Google.Protobuf
+{
+ internal sealed class JsonToken : IEquatable<JsonToken>
+ {
+ // Tokens with no value can be reused.
+ private static readonly JsonToken _true = new JsonToken(TokenType.True);
+ private static readonly JsonToken _false = new JsonToken(TokenType.False);
+ private static readonly JsonToken _null = new JsonToken(TokenType.Null);
+ private static readonly JsonToken startObject = new JsonToken(TokenType.StartObject);
+ private static readonly JsonToken endObject = new JsonToken(TokenType.EndObject);
+ private static readonly JsonToken startArray = new JsonToken(TokenType.StartArray);
+ private static readonly JsonToken endArray = new JsonToken(TokenType.EndArray);
+ private static readonly JsonToken endDocument = new JsonToken(TokenType.EndDocument);
+
+ internal static JsonToken Null { get { return _null; } }
+ internal static JsonToken False { get { return _false; } }
+ internal static JsonToken True { get { return _true; } }
+ internal static JsonToken StartObject{ get { return startObject; } }
+ internal static JsonToken EndObject { get { return endObject; } }
+ internal static JsonToken StartArray { get { return startArray; } }
+ internal static JsonToken EndArray { get { return endArray; } }
+ internal static JsonToken EndDocument { get { return endDocument; } }
+
+ internal static JsonToken Name(string name)
+ {
+ return new JsonToken(TokenType.Name, stringValue: name);
+ }
+
+ internal static JsonToken Value(string value)
+ {
+ return new JsonToken(TokenType.StringValue, stringValue: value);
+ }
+
+ internal static JsonToken Value(double value)
+ {
+ return new JsonToken(TokenType.Number, numberValue: value);
+ }
+
+ internal enum TokenType
+ {
+ Null,
+ False,
+ True,
+ StringValue,
+ Number,
+ Name,
+ StartObject,
+ EndObject,
+ StartArray,
+ EndArray,
+ EndDocument
+ }
+
+ // A value is a string, number, array, object, null, true or false
+ // Arrays and objects have start/end
+ // A document consists of a value
+ // Objects are name/value sequences.
+
+ private readonly TokenType type;
+ private readonly string stringValue;
+ private readonly double numberValue;
+
+ internal TokenType Type { get { return type; } }
+ internal string StringValue { get { return stringValue; } }
+ internal double NumberValue { get { return numberValue; } }
+
+ private JsonToken(TokenType type, string stringValue = null, double numberValue = 0)
+ {
+ this.type = type;
+ this.stringValue = stringValue;
+ this.numberValue = numberValue;
+ }
+
+ public override bool Equals(object obj)
+ {
+ return Equals(obj as JsonToken);
+ }
+
+ public override int GetHashCode()
+ {
+ unchecked
+ {
+ int hash = 17;
+ hash = hash * 31 + (int) type;
+ hash = hash * 31 + stringValue == null ? 0 : stringValue.GetHashCode();
+ hash = hash * 31 + numberValue.GetHashCode();
+ return hash;
+ }
+ }
+
+ public override string ToString()
+ {
+ switch (type)
+ {
+ case TokenType.Null:
+ return "null";
+ case TokenType.True:
+ return "true";
+ case TokenType.False:
+ return "false";
+ case TokenType.Name:
+ return "name (" + stringValue + ")";
+ case TokenType.StringValue:
+ return "value (" + stringValue + ")";
+ case TokenType.Number:
+ return "number (" + numberValue + ")";
+ case TokenType.StartObject:
+ return "start-object";
+ case TokenType.EndObject:
+ return "end-object";
+ case TokenType.StartArray:
+ return "start-array";
+ case TokenType.EndArray:
+ return "end-array";
+ case TokenType.EndDocument:
+ return "end-document";
+ default:
+ throw new InvalidOperationException("Token is of unknown type " + type);
+ }
+ }
+
+ public bool Equals(JsonToken other)
+ {
+ if (ReferenceEquals(other, null))
+ {
+ return false;
+ }
+ // Note use of other.numberValue.Equals rather than ==, so that NaN compares appropriately.
+ return other.type == type && other.stringValue == stringValue && other.numberValue.Equals(numberValue);
+ }
+ }
+}