130 lines
3.9 KiB
C#
130 lines
3.9 KiB
C#
//-----------------------------------------------------------------------
|
|
// -----------------------------------------------------------------------
|
|
// file="ExpLogic"
|
|
// Project: StgSharp
|
|
// AuthorGroup: Nitload Space
|
|
// Copyright (c) Nitload Space. All rights reserved.
|
|
//
|
|
// 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.Generic;
|
|
using System.Runtime.CompilerServices;
|
|
using System.Text;
|
|
|
|
namespace StgSharp.Script.Express
|
|
{
|
|
public enum ExpLogicValue
|
|
{
|
|
|
|
True,
|
|
False,
|
|
Unknown
|
|
|
|
}
|
|
|
|
public struct ExpLogic
|
|
{
|
|
|
|
public static readonly ExpLogic False = new ExpLogic(ExpLogicValue.False);
|
|
|
|
public static readonly ExpLogic True = new ExpLogic(ExpLogicValue.True);
|
|
public static readonly ExpLogic Unknown = new ExpLogic(ExpLogicValue.Unknown);
|
|
|
|
private readonly ExpLogicValue _value;
|
|
|
|
public ExpLogic(ExpLogicValue value)
|
|
{
|
|
_value = value;
|
|
}
|
|
|
|
public bool IsTrue => _value == ExpLogicValue.True;
|
|
|
|
public bool IsFalse => _value == ExpLogicValue.False;
|
|
|
|
public bool IsUnknown => _value == ExpLogicValue.Unknown;
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public bool ToBoolean()
|
|
{
|
|
return _value == ExpLogicValue.True;
|
|
}
|
|
|
|
public override string ToString() => _value.ToString();
|
|
|
|
public static bool TryParse(ReadOnlySpan<char> value, out ExpLogic result)
|
|
{
|
|
if (Enum.TryParse<ExpLogicValue>(value, out ExpLogicValue e))
|
|
{
|
|
result = new ExpLogic(e);
|
|
return true;
|
|
}
|
|
result = default;
|
|
return false;
|
|
}
|
|
|
|
// NOT !
|
|
public static ExpLogic operator !(ExpLogic a)
|
|
{
|
|
return a.IsTrue ? False : a.IsFalse ? True : Unknown;
|
|
}
|
|
|
|
// AND &
|
|
public static ExpLogic operator &(ExpLogic a, ExpLogic b)
|
|
{
|
|
if (a.IsFalse || b.IsFalse) {
|
|
return False;
|
|
}
|
|
|
|
if (a.IsUnknown || b.IsUnknown) {
|
|
return Unknown;
|
|
}
|
|
|
|
return True;
|
|
}
|
|
|
|
// XOR ^
|
|
public static ExpLogic operator ^(ExpLogic a, ExpLogic b)
|
|
{
|
|
if (a.IsUnknown || b.IsUnknown) {
|
|
return Unknown;
|
|
}
|
|
|
|
return (a.IsTrue ^ b.IsTrue) ? True : False;
|
|
}
|
|
|
|
// OR |
|
|
public static ExpLogic operator |(ExpLogic a, ExpLogic b)
|
|
{
|
|
if (a.IsTrue || b.IsTrue) {
|
|
return True;
|
|
}
|
|
|
|
if (a.IsUnknown || b.IsUnknown) {
|
|
return Unknown;
|
|
}
|
|
|
|
return False;
|
|
}
|
|
|
|
}
|
|
}
|