Complete sources for a monero webminer.
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// https://github.com/zanders3/json
// The MIT License (MIT)
// Copyright (c) 2015 Alex Parker
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Runtime.Serialization;
using System.Text;
namespace TinyJson
{
public static class JSONParser
{
[ThreadStatic]
static Stack<List<string>> splitArrayPool;
[ThreadStatic]
static StringBuilder stringBuilder;
[ThreadStatic]
static Dictionary<Type, Dictionary<string, FieldInfo>> fieldInfoCache;
[ThreadStatic]
static Dictionary<Type, Dictionary<string, PropertyInfo>> propertyInfoCache;
[ThreadStatic]
static bool initialized = false;
public static T FromJson<T>(this string json)
{
if (!initialized)
{
/* Do not specify initial values for fields marked with ThreadStaticAttribute, because such initialization
* occurs only once, when the class constructor executes, and therefore affects only one thread. */
splitArrayPool = new Stack<List<string>>();
stringBuilder = new StringBuilder();
fieldInfoCache = new Dictionary<Type, Dictionary<string, FieldInfo>>();
propertyInfoCache = new Dictionary<Type, Dictionary<string, PropertyInfo>>();
initialized = true;
}
try
{
if (string.IsNullOrEmpty(json))
return default(T);
//Remove all whitespace not within strings to make parsing simpler
stringBuilder.Length = 0;
for (int i = 0; i < json.Length; i++)
{
char c = json[i];
if (c == '\"')
{
i = AppendUntilStringEnd(true, i, json);
continue;
}
if (char.IsWhiteSpace(c))
continue;
stringBuilder.Append(c);
}
//Parse the thing!
return (T)ParseValue(typeof(T), stringBuilder.ToString());
}
catch { return default(T); }
}
static int AppendUntilStringEnd(bool appendEscapeCharacter, int startIdx, string json)
{
stringBuilder.Append(json[startIdx]);
for (int i = startIdx + 1; i < json.Length; i++)
{
if (json[i] == '\\')
{
if (appendEscapeCharacter)
stringBuilder.Append(json[i]);
stringBuilder.Append(json[i + 1]);
i++; //Skip next character as it is escaped
}
else if (json[i] == '\"')
{
stringBuilder.Append(json[i]);
return i;
}
else
stringBuilder.Append(json[i]);
}
return json.Length - 1;
}
//Splits { <value>:<value>, <value>:<value> } and [ <value>, <value> ] into a list of <value> strings
static List<string> Split(string json)
{
List<string> splitArray = splitArrayPool.Count > 0 ? splitArrayPool.Pop() : new List<string>();
splitArray.Clear();
int parseDepth = 0;
stringBuilder.Length = 0;
for (int i = 1; i < json.Length - 1; i++)
{
switch (json[i])
{
case '[':
case '{':
parseDepth++;
break;
case ']':
case '}':
parseDepth--;
break;
case '\"':
i = AppendUntilStringEnd(true, i, json);
continue;
case ',':
case ':':
if (parseDepth == 0)
{
splitArray.Add(stringBuilder.ToString());
stringBuilder.Length = 0;
continue;
}
break;
}
stringBuilder.Append(json[i]);
}
splitArray.Add(stringBuilder.ToString());
return splitArray;
}
internal static object ParseValue(Type type, string json)
{
if (type == typeof(string))
{
if (json.Length <= 2)
return string.Empty;
string str = json.Substring(1, json.Length - 2);
return str.Replace("\\\\", "\"\"").Replace("\\", string.Empty).Replace("\"\"", "\\");
}
if (type == typeof(int))
{
int.TryParse(json, out int result);
return result;
}
if (type == typeof(float))
{
float.TryParse(json, out float result);
return result;
}
if (type == typeof(double))
{
double.TryParse(json, out double result);
return result;
}
if (type == typeof(bool))
{
return json.ToLower() == "true";
}
if (json == "null")
{
return null;
}
if (type.IsArray)
{
Type arrayType = type.GetElementType();
if (json[0] != '[' || json[json.Length - 1] != ']')
return null;
List<string> elems = Split(json);
Array newArray = Array.CreateInstance(arrayType, elems.Count);
for (int i = 0; i < elems.Count; i++)
newArray.SetValue(ParseValue(arrayType, elems[i]), i);
splitArrayPool.Push(elems);
return newArray;
}
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(List<>))
{
Type listType = type.GetGenericArguments()[0];
if (json[0] != '[' || json[json.Length - 1] != ']')
return null;
List<string> elems = Split(json);
var list = (IList)type.GetConstructor(new Type[] { typeof(int) }).Invoke(new object[] { elems.Count });
for (int i = 0; i < elems.Count; i++)
list.Add(ParseValue(listType, elems[i]));
splitArrayPool.Push(elems);
return list;
}
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Dictionary<,>))
{
Type keyType, valueType;
{
Type[] args = type.GetGenericArguments();
keyType = args[0];
valueType = args[1];
}
//Refuse to parse dictionary keys that aren't of type string
if (keyType != typeof(string))
return null;
//Must be a valid dictionary element
if (json[0] != '{' || json[json.Length - 1] != '}')
return null;
//The list is split into key/value pairs only, this means the split must be divisible by 2 to be valid JSON
List<string> elems = Split(json);
if (elems.Count % 2 != 0)
return null;
var dictionary = (IDictionary)type.GetConstructor(new Type[] { typeof(int) }).Invoke(new object[] { elems.Count / 2 });
for (int i = 0; i < elems.Count; i += 2)
{
if (elems[i].Length <= 2)
continue;
string keyValue = elems[i].Substring(1, elems[i].Length - 2);
object val = ParseValue(valueType, elems[i + 1]);
dictionary.Add(keyValue, val);
}
return dictionary;
}
if (type == typeof(object))
{
return ParseAnonymousValue(json);
}
if (json[0] == '{' && json[json.Length - 1] == '}')
{
return ParseObject(type, json);
}
return null;
}
static object ParseAnonymousValue(string json)
{
if (json.Length == 0)
return null;
if (json[0] == '{' && json[json.Length - 1] == '}')
{
List<string> elems = Split(json);
if (elems.Count % 2 != 0)
return null;
var dict = new Dictionary<string, object>(elems.Count / 2);
for (int i = 0; i < elems.Count; i += 2)
dict.Add(elems[i].Substring(1, elems[i].Length - 2), ParseAnonymousValue(elems[i + 1]));
return dict;
}
if (json[0] == '[' && json[json.Length - 1] == ']')
{
List<string> items = Split(json);
var finalList = new List<object>(items.Count);
for (int i = 0; i < items.Count; i++)
finalList.Add(ParseAnonymousValue(items[i]));
return finalList;
}
if (json[0] == '\"' && json[json.Length - 1] == '\"')
{
string str = json.Substring(1, json.Length - 2);
return str.Replace("\\", string.Empty);
}
if (char.IsDigit(json[0]) || json[0] == '-')
{
if (json.Contains("."))
{
double.TryParse(json, out double result);
return result;
}
else
{
int.TryParse(json, out int result);
return result;
}
}
if (json == "true")
return true;
if (json == "false")
return false;
// handles json == "null" as well as invalid JSON
return null;
}
static object ParseObject(Type type, string json)
{
object instance = FormatterServices.GetUninitializedObject(type);
//The list is split into key/value pairs only, this means the split must be divisible by 2 to be valid JSON
List<string> elems = Split(json);
if (elems.Count % 2 != 0)
return instance;
Dictionary<string, FieldInfo> nameToField;
Dictionary<string, PropertyInfo> nameToProperty;
if (!fieldInfoCache.TryGetValue(type, out nameToField))
{
nameToField = type.GetFields().Where(field => field.IsPublic).ToDictionary(field => field.Name);
fieldInfoCache.Add(type, nameToField);
}
if (!propertyInfoCache.TryGetValue(type, out nameToProperty))
{
nameToProperty = type.GetProperties().ToDictionary(p => p.Name);
propertyInfoCache.Add(type, nameToProperty);
}
for (int i = 0; i < elems.Count; i += 2)
{
if (elems[i].Length <= 2)
continue;
string key = elems[i].Substring(1, elems[i].Length - 2);
string value = elems[i + 1];
FieldInfo fieldInfo;
PropertyInfo propertyInfo;
if (nameToField.TryGetValue(key, out fieldInfo))
fieldInfo.SetValue(instance, ParseValue(fieldInfo.FieldType, value));
else if (nameToProperty.TryGetValue(key, out propertyInfo))
propertyInfo.SetValue(instance, ParseValue(propertyInfo.PropertyType, value), null);
}
return instance;
}
}
}