94 lines
3.1 KiB
C#
94 lines
3.1 KiB
C#
//-----------------------------------------------------------------------
|
|
// -----------------------------------------------------------------------
|
|
// file="Node.Char"
|
|
// 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 StgSharp.State;
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.Linq;
|
|
using System.Runtime.CompilerServices;
|
|
using System.Text;
|
|
using System.Threading.Tasks;
|
|
|
|
namespace StgSharp.RegularAnalysis
|
|
{
|
|
internal class RegularExpressionEpsilonNode : RegularStateNode
|
|
{
|
|
}
|
|
|
|
|
|
internal class RegularExpressionCharNode : RegularStateNode
|
|
{
|
|
|
|
private char _char;
|
|
|
|
public RegularExpressionCharNode(char c)
|
|
{
|
|
_char = c;
|
|
}
|
|
|
|
public override NodeType Type => NodeType.CHAR;
|
|
|
|
public override bool IsValidateFrom(RegularStateNode former, RegularContext context)
|
|
{
|
|
int pos = context.Position;
|
|
char c = context.CurrentCharSpan[pos + 1];
|
|
return c == _char;
|
|
}
|
|
|
|
}
|
|
|
|
internal class RegularExpressionCharsetNode : RegularStateNode
|
|
{
|
|
|
|
private bool _isNegated;
|
|
private HashSet<char> _charset;
|
|
|
|
public RegularExpressionCharsetNode(IEnumerable<char> charset, bool isNegated = false)
|
|
{
|
|
_charset = new(charset);
|
|
_isNegated = isNegated;
|
|
}
|
|
|
|
public RegularExpressionCharsetNode(ReadOnlySpan<char> charset, bool isNegated = false)
|
|
{
|
|
_charset = new(charset.Length);
|
|
_isNegated = isNegated;
|
|
}
|
|
|
|
public override NodeType Type => NodeType.CHARSET;
|
|
|
|
public override bool IsValidateFrom(RegularStateNode former, RegularContext context)
|
|
{
|
|
int pos = context.Position;
|
|
char c = context.CurrentCharSpan[pos + 1];
|
|
bool contains = _charset.Contains(c);
|
|
return _isNegated ? !contains : contains;
|
|
}
|
|
|
|
}
|
|
}
|