108 lines
3.6 KiB
C#
108 lines
3.6 KiB
C#
//-----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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// file="RegularExpression.Node.Char"
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// Project: StgSharp
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// AuthorGroup: Nitload
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// Copyright (c) Nitload. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// 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, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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// -----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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using StgSharp.State;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Runtime.CompilerServices;
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using System.Text;
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using System.Threading.Tasks;
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namespace StgSharp.RegularAnalysis
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{
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internal class RegularExpressionCharNode : RegularStateNode
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{
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private char _char;
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public RegularExpressionCharNode(
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char c
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)
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{
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_char = c;
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}
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public override NodeType Type => NodeType.CHAR;
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public override bool IsValidateFrom(
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RegularStateNode former,
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RegularContext context
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)
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{
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int pos = context.Position;
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char c = context.CurrentCharSpan[pos + 1];
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return c == _char;
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}
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}
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internal class RegularExpressionCharsetNode : RegularStateNode
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{
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private bool _isNegated;
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private HashSet<char> _charset;
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public RegularExpressionCharsetNode(
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IEnumerable<char> charset,
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bool isNegated = false
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)
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{
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_charset = new(charset);
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_isNegated = isNegated;
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}
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public RegularExpressionCharsetNode(
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ReadOnlySpan<char> charset,
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bool isNegated = false
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)
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{
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_charset = new(charset.Length);
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foreach (char item in _charset) {
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_charset.Add(item);
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}
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_isNegated = isNegated;
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}
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public override NodeType Type => NodeType.CHARSET;
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public override bool IsValidateFrom(
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RegularStateNode former,
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RegularContext context
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)
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{
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int pos = context.Position;
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char c = context.CurrentCharSpan[pos + 1];
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bool contains = _charset.Contains(c);
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return _isNegated ? !contains : contains;
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}
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}
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}
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