chore: sync workspace state
This commit is contained in:
403
MVS/3DGS-Unity/Editor/Utils/TinyJsonParser.cs
Normal file
403
MVS/3DGS-Unity/Editor/Utils/TinyJsonParser.cs
Normal file
@@ -0,0 +1,403 @@
|
||||
/*
|
||||
Embedded TinyJSON from https://github.com/pbhogan/TinyJSON (version 71fed96, 2019 May 10) directly here, with
|
||||
custom namespace wrapped around it so it does not clash with any other embedded TinyJSON. Original license:
|
||||
|
||||
The MIT License (MIT)
|
||||
|
||||
Copyright (c) 2018 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.Reflection;
|
||||
using System.Runtime.Serialization;
|
||||
using System.Text;
|
||||
|
||||
namespace GaussianSplatting.Editor.Utils
|
||||
{
|
||||
// Really simple JSON parser in ~300 lines
|
||||
// - Attempts to parse JSON files with minimal GC allocation
|
||||
// - Nice and simple "[1,2,3]".FromJson<List<int>>() API
|
||||
// - Classes and structs can be parsed too!
|
||||
// class Foo { public int Value; }
|
||||
// "{\"Value\":10}".FromJson<Foo>()
|
||||
// - Can parse JSON without type information into Dictionary<string,object> and List<object> e.g.
|
||||
// "[1,2,3]".FromJson<object>().GetType() == typeof(List<object>)
|
||||
// "{\"Value\":10}".FromJson<object>().GetType() == typeof(Dictionary<string,object>)
|
||||
// - No JIT Emit support to support AOT compilation on iOS
|
||||
// - Attempts are made to NOT throw an exception if the JSON is corrupted or invalid: returns null instead.
|
||||
// - Only public fields and property setters on classes/structs will be written to
|
||||
//
|
||||
// Limitations:
|
||||
// - No JIT Emit support to parse structures quickly
|
||||
// - Limited to parsing <2GB JSON files (due to int.MaxValue)
|
||||
// - Parsing of abstract classes or interfaces is NOT supported and will throw an exception.
|
||||
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;
|
||||
|
||||
public static T FromJson<T>(this string json)
|
||||
{
|
||||
// Initialize, if needed, the ThreadStatic variables
|
||||
if (propertyInfoCache == null) propertyInfoCache = new Dictionary<Type, Dictionary<string, PropertyInfo>>();
|
||||
if (fieldInfoCache == null) fieldInfoCache = new Dictionary<Type, Dictionary<string, FieldInfo>>();
|
||||
if (stringBuilder == null) stringBuilder = new StringBuilder();
|
||||
if (splitArrayPool == null) splitArrayPool = new Stack<List<string>>();
|
||||
|
||||
//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());
|
||||
}
|
||||
|
||||
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();
|
||||
if (json.Length == 2)
|
||||
return splitArray;
|
||||
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;
|
||||
StringBuilder parseStringBuilder = new StringBuilder(json.Length);
|
||||
for (int i = 1; i < json.Length - 1; ++i)
|
||||
{
|
||||
if (json[i] == '\\' && i + 1 < json.Length - 1)
|
||||
{
|
||||
int j = "\"\\nrtbf/".IndexOf(json[i + 1]);
|
||||
if (j >= 0)
|
||||
{
|
||||
parseStringBuilder.Append("\"\\\n\r\t\b\f/"[j]);
|
||||
++i;
|
||||
continue;
|
||||
}
|
||||
if (json[i + 1] == 'u' && i + 5 < json.Length - 1)
|
||||
{
|
||||
UInt32 c = 0;
|
||||
if (UInt32.TryParse(json.Substring(i + 2, 4), System.Globalization.NumberStyles.AllowHexSpecifier, null, out c))
|
||||
{
|
||||
parseStringBuilder.Append((char)c);
|
||||
i += 5;
|
||||
continue;
|
||||
}
|
||||
}
|
||||
}
|
||||
parseStringBuilder.Append(json[i]);
|
||||
}
|
||||
return parseStringBuilder.ToString();
|
||||
}
|
||||
if (type.IsPrimitive)
|
||||
{
|
||||
var result = Convert.ChangeType(json, type, System.Globalization.CultureInfo.InvariantCulture);
|
||||
return result;
|
||||
}
|
||||
if (type == typeof(decimal))
|
||||
{
|
||||
decimal result;
|
||||
decimal.TryParse(json, System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.InvariantCulture, out result);
|
||||
return result;
|
||||
}
|
||||
if (type == typeof(DateTime))
|
||||
{
|
||||
DateTime result;
|
||||
DateTime.TryParse(json.Replace("\"",""), System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.None, out result);
|
||||
return result;
|
||||
}
|
||||
if (json == "null")
|
||||
{
|
||||
return null;
|
||||
}
|
||||
if (type.IsEnum)
|
||||
{
|
||||
if (json[0] == '"')
|
||||
json = json.Substring(1, json.Length - 2);
|
||||
try
|
||||
{
|
||||
return Enum.Parse(type, json, false);
|
||||
}
|
||||
catch
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
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[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[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 result;
|
||||
double.TryParse(json, System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.InvariantCulture, out result);
|
||||
return result;
|
||||
}
|
||||
else
|
||||
{
|
||||
int result;
|
||||
int.TryParse(json, out result);
|
||||
return result;
|
||||
}
|
||||
}
|
||||
if (json == "true")
|
||||
return true;
|
||||
if (json == "false")
|
||||
return false;
|
||||
// handles json == "null" as well as invalid JSON
|
||||
return null;
|
||||
}
|
||||
|
||||
static Dictionary<string, T> CreateMemberNameDictionary<T>(T[] members) where T : MemberInfo
|
||||
{
|
||||
Dictionary<string, T> nameToMember = new Dictionary<string, T>(StringComparer.OrdinalIgnoreCase);
|
||||
for (int i = 0; i < members.Length; i++)
|
||||
{
|
||||
T member = members[i];
|
||||
if (member.IsDefined(typeof(IgnoreDataMemberAttribute), true))
|
||||
continue;
|
||||
|
||||
string name = member.Name;
|
||||
if (member.IsDefined(typeof(DataMemberAttribute), true))
|
||||
{
|
||||
DataMemberAttribute dataMemberAttribute = (DataMemberAttribute)Attribute.GetCustomAttribute(member, typeof(DataMemberAttribute), true);
|
||||
if (!string.IsNullOrEmpty(dataMemberAttribute.Name))
|
||||
name = dataMemberAttribute.Name;
|
||||
}
|
||||
|
||||
nameToMember.Add(name, member);
|
||||
}
|
||||
|
||||
return nameToMember;
|
||||
}
|
||||
|
||||
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 = CreateMemberNameDictionary(type.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy));
|
||||
fieldInfoCache.Add(type, nameToField);
|
||||
}
|
||||
if (!propertyInfoCache.TryGetValue(type, out nameToProperty))
|
||||
{
|
||||
nameToProperty = CreateMemberNameDictionary(type.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy));
|
||||
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;
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user