582 lines
18 KiB
C#
582 lines
18 KiB
C#
/*
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* Copyright (c) 2013 Calvin Rien
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*
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* Based on the JSON parser by Patrick van Bergen
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* http://techblog.procurios.nl/k/618/news/view/14605/14863/How-do-I-write-my-own-parser-for-JSON.html
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*
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* Simplified it so that it doesn't throw exceptions
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* and can be used in Unity iPhone with maximum code stripping.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.IO;
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using System.Text;
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namespace UnityEngine.Advertisements.Utilities
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{
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static internal class Json
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{
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public static object Deserialize(string json)
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{
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if (json == null)
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{
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return null;
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}
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return Parser.Parse(json);
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}
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sealed class Parser : IDisposable
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{
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const string WORD_BREAK = "{}[],:\"";
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public static bool IsWordBreak(char c)
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{
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return char.IsWhiteSpace(c) || WORD_BREAK.IndexOf(c) != -1;
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}
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enum TOKEN
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{
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NONE,
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CURLY_OPEN,
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CURLY_CLOSE,
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SQUARED_OPEN,
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SQUARED_CLOSE,
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COLON,
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COMMA,
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STRING,
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NUMBER,
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TRUE,
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FALSE,
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NULL
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};
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StringReader json;
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Parser(string jsonString)
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{
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json = new StringReader(jsonString);
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}
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public static object Parse(string jsonString)
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{
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using (var instance = new Parser(jsonString))
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{
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return instance.ParseValue();
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}
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}
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public void Dispose()
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{
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json.Dispose();
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json = null;
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}
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Dictionary<string, object> ParseObject()
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{
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var table = new Dictionary<string, object>();
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// ditch opening brace
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json.Read();
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// {
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while (true)
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{
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switch (NextToken)
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{
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case TOKEN.NONE:
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return null;
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case TOKEN.COMMA:
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continue;
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case TOKEN.CURLY_CLOSE:
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return table;
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default:
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// name
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string name = ParseString();
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if (name == null)
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{
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return null;
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}
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// :
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if (NextToken != TOKEN.COLON)
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{
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return null;
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}
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// ditch the colon
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json.Read();
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// value
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table[name] = ParseValue();
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break;
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}
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}
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}
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List<object> ParseArray()
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{
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List<object> array = new List<object>();
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// ditch opening bracket
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json.Read();
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// [
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var parsing = true;
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while (parsing)
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{
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TOKEN nextToken = NextToken;
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switch (nextToken)
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{
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case TOKEN.NONE:
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return null;
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case TOKEN.COMMA:
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continue;
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case TOKEN.SQUARED_CLOSE:
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parsing = false;
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break;
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default:
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object value = ParseByToken(nextToken);
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array.Add(value);
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break;
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}
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}
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return array;
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}
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object ParseValue()
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{
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TOKEN nextToken = NextToken;
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return ParseByToken(nextToken);
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}
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object ParseByToken(TOKEN token)
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{
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switch (token)
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{
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case TOKEN.STRING:
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return ParseString();
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case TOKEN.NUMBER:
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return ParseNumber();
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case TOKEN.CURLY_OPEN:
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return ParseObject();
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case TOKEN.SQUARED_OPEN:
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return ParseArray();
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case TOKEN.TRUE:
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return true;
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case TOKEN.FALSE:
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return false;
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case TOKEN.NULL:
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return null;
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default:
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return null;
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}
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}
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string ParseString()
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{
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StringBuilder s = new StringBuilder();
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char c;
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// ditch opening quote
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json.Read();
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bool parsing = true;
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while (parsing)
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{
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if (json.Peek() == -1)
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{
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parsing = false;
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break;
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}
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c = NextChar;
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switch (c)
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{
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case '"':
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parsing = false;
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break;
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case '\\':
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if (json.Peek() == -1)
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{
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parsing = false;
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break;
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}
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c = NextChar;
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switch (c)
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{
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case '"':
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case '\\':
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case '/':
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s.Append(c);
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break;
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case 'b':
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s.Append('\b');
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break;
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case 'f':
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s.Append('\f');
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break;
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case 'n':
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s.Append('\n');
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break;
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case 'r':
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s.Append('\r');
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break;
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case 't':
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s.Append('\t');
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break;
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case 'u':
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var hex = new char[4];
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for (int i = 0; i < 4; i++)
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{
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hex[i] = NextChar;
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}
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s.Append((char)Convert.ToInt32(new string(hex), 16));
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break;
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}
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break;
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default:
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s.Append(c);
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break;
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}
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}
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return s.ToString();
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}
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object ParseNumber()
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{
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string number = NextWord;
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if (number.IndexOf('.') == -1)
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{
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long parsedInt;
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long.TryParse(number, System.Globalization.NumberStyles.Any, System.Globalization.CultureInfo.InvariantCulture, out parsedInt);
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return parsedInt;
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}
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double parsedDouble;
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double.TryParse(number, System.Globalization.NumberStyles.Any, System.Globalization.CultureInfo.InvariantCulture, out parsedDouble);
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return parsedDouble;
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}
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void EatWhitespace()
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{
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while (char.IsWhiteSpace(PeekChar))
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{
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json.Read();
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if (json.Peek() == -1)
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{
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break;
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}
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}
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}
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char PeekChar
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{
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get
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{
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return Convert.ToChar(json.Peek());
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}
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}
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char NextChar
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{
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get
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{
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return Convert.ToChar(json.Read());
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}
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}
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string NextWord
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{
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get
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{
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var word = new StringBuilder();
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while (!IsWordBreak(PeekChar))
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{
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word.Append(NextChar);
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if (json.Peek() == -1)
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{
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break;
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}
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}
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return word.ToString();
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}
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}
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TOKEN NextToken
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{
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get
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{
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EatWhitespace();
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if (json.Peek() == -1)
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{
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return TOKEN.NONE;
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}
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switch (PeekChar)
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{
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case '{':
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return TOKEN.CURLY_OPEN;
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case '}':
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json.Read();
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return TOKEN.CURLY_CLOSE;
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case '[':
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return TOKEN.SQUARED_OPEN;
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case ']':
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json.Read();
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return TOKEN.SQUARED_CLOSE;
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case ',':
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json.Read();
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return TOKEN.COMMA;
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case '"':
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return TOKEN.STRING;
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case ':':
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return TOKEN.COLON;
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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case '-':
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return TOKEN.NUMBER;
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}
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switch (NextWord)
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{
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case "false":
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return TOKEN.FALSE;
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case "true":
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return TOKEN.TRUE;
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case "null":
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return TOKEN.NULL;
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}
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return TOKEN.NONE;
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}
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}
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}
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public static string Serialize(object obj)
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{
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return Serializer.Serialize(obj);
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}
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sealed class Serializer
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{
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StringBuilder builder;
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Serializer()
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{
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builder = new StringBuilder();
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}
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public static string Serialize(object obj)
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{
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var instance = new Serializer();
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instance.SerializeValue(obj);
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return instance.builder.ToString();
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}
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void SerializeValue(object value)
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{
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IList asList;
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IDictionary asDict;
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string asStr;
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if (value == null)
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{
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builder.Append("null");
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}
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else if ((asStr = value as string) != null)
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{
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SerializeString(asStr);
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}
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else if (value is bool)
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{
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builder.Append((bool)value ? "true" : "false");
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}
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else if ((asList = value as IList) != null)
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{
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SerializeArray(asList);
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}
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else if ((asDict = value as IDictionary) != null)
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{
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SerializeObject(asDict);
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}
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else if (value is char)
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{
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SerializeString(new string((char)value, 1));
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}
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else
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{
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SerializeOther(value);
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}
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}
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void SerializeObject(IDictionary obj)
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{
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bool first = true;
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builder.Append('{');
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foreach (object e in obj.Keys)
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{
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if (!first)
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{
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builder.Append(',');
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}
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SerializeString(e.ToString());
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builder.Append(':');
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SerializeValue(obj[e]);
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first = false;
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}
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builder.Append('}');
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}
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void SerializeArray(IList anArray)
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{
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builder.Append('[');
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bool first = true;
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foreach (object obj in anArray)
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{
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if (!first)
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{
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builder.Append(',');
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}
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SerializeValue(obj);
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first = false;
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}
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builder.Append(']');
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}
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void SerializeString(string str)
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{
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builder.Append('\"');
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char[] charArray = str.ToCharArray();
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foreach (var c in charArray)
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{
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switch (c)
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{
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case '"':
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builder.Append("\\\"");
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break;
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case '\\':
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builder.Append("\\\\");
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break;
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case '\b':
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builder.Append("\\b");
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break;
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case '\f':
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builder.Append("\\f");
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break;
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case '\n':
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builder.Append("\\n");
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break;
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case '\r':
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builder.Append("\\r");
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break;
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case '\t':
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builder.Append("\\t");
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break;
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default:
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int codepoint = Convert.ToInt32(c);
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if ((codepoint >= 32) && (codepoint <= 126))
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{
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builder.Append(c);
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}
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else
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{
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builder.Append("\\u");
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builder.Append(codepoint.ToString("x4"));
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}
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break;
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}
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}
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builder.Append('\"');
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}
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void SerializeOther(object value)
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{
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// NOTE: decimals lose precision during serialization.
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// They always have, I'm just letting you know.
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// Previously floats and doubles lost precision too.
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if (value is float)
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{
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builder.Append(((float)value).ToString("R", System.Globalization.CultureInfo.InvariantCulture));
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}
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else if (value is int
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|| value is uint
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|| value is long
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|| value is sbyte
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|| value is byte
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|| value is short
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|| value is ushort
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|| value is ulong)
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{
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builder.Append(value);
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}
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else if (value is double
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|| value is decimal)
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{
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builder.Append(Convert.ToDouble(value).ToString("R", System.Globalization.CultureInfo.InvariantCulture));
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}
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else
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{
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SerializeString(value.ToString());
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}
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}
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}
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}
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}
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