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add parser for concat

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This commit is contained in:
Youmu Liu
2026-02-04 16:30:09 +08:00
parent f1688583cf
commit 6292157fc0
10 changed files with 227 additions and 62 deletions
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StgSharp.RegularAnalysis/TextRegex/RegexAstNode.cs
+12
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@@ -0,0 +1,12 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace StgSharp.RegularAnalysis.TextRegex
{
internal class RegexAstNode
{
}
}
StgSharp.RegularAnalysis/TextRegex/RegexAstLabel.cs → StgSharp.RegularAnalysis/TextRegex/RegexElementLabel.cs
+13 -8
View File
@@ -1,6 +1,6 @@
//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="RegexAstLabel"
// file="RegexElementLabel"
// Project: StgSharp
// AuthorGroup: Nitload
// Copyright (c) Nitload. All rights reserved.
@@ -33,15 +33,20 @@ using System.Threading.Tasks;
namespace StgSharp.RegularAnalysis.TextRegex
{
internal enum RegexAstLabel
[Flags]
internal enum RegexElementLabel
{
CHAR,
CHAR_SET,
GROUP_NAME,
GROUP_BEGIN,
GROUP_END,
COUNT,
NONE = 0,
UNIT = 1,
GROUP_BEGIN = 2,
GROUP_END = 4,
COUNT = 8,
ALT = 16,
CONCAT = 32,
OPERATOR = COUNT | ALT | CONCAT,
ATOM_BEGIN = UNIT | GROUP_BEGIN,
ATOM_END = UNIT | GROUP_END | COUNT,
}
}
StgSharp.RegularAnalysis/TextRegex/RegexInterpreter.cs
+50
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@@ -0,0 +1,50 @@
//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="RegexInterpreter"
// Project: StgSharp
// AuthorGroup: Nitload
// Copyright (c) Nitload. 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.RegularAnalysis.Abstraction;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace StgSharp.RegularAnalysis.TextRegex
{
public class RegexInterpreter
{
public static AbstractSyntaxTree<RegexAstNode, RegexElementLabel> Analyze(
string regex
)
{
RegexTokenReader reader = new RegexTokenReader(regex);
TokenParser<RegexElementLabel, RegexElementLabel> lexer = reader.Pipe(() => new RegexTokenParser());
}
}
}
StgSharp.RegularAnalysis/TextRegex/RegexTokenParser.cs
+88
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@@ -0,0 +1,88 @@
//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="RegexTokenParser"
// Project: StgSharp
// AuthorGroup: Nitload
// Copyright (c) Nitload. 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.RegularAnalysis.Abstraction;
using System;
using System.Collections.Generic;
using System.Diagnostics.Tracing;
using System.IO.Pipes;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace StgSharp.RegularAnalysis.TextRegex
{
internal class RegexTokenParser : TokenParser<RegexElementLabel, RegexElementLabel>
{
private readonly Queue<Token<RegexElementLabel>> _buffer = [];
private RegexElementLabel _prev;
public override bool IsEmpty => Source.IsEmpty && _buffer.Count == 0;
public override Token<RegexElementLabel> ReadToken()
{
if (_buffer.TryDequeue(out Token<RegexElementLabel> token)) {
return token;
}
if (Source.TryReadToken(out Token<RegexElementLabel> orig))
{
if (((int)(orig.Flag | RegexElementLabel.ATOM_BEGIN) != 0) && ((int)_prev != 0))
{
Token<RegexElementLabel> ret = new Token<RegexElementLabel>(string.Empty, orig.Line,
orig.Column,
RegexElementLabel.OPERATOR);
_buffer.Enqueue(orig);
_prev = orig.Flag & RegexElementLabel.ATOM_END;
return ret;
} else
{
_prev = orig.Flag & RegexElementLabel.ATOM_END;
return orig;
}
} else
{
return Token<RegexElementLabel>.Empty;
}
}
public override bool TryReadToken(
out Token<RegexElementLabel> t
)
{
if (IsEmpty)
{
t = Token<RegexElementLabel>.Empty;
return false;
}
t = ReadToken();
return t == Token<RegexElementLabel>.Empty;
}
}
}
StgSharp.RegularAnalysis/TextRegex/RegexLexer.cs → StgSharp.RegularAnalysis/TextRegex/RegexTokenReader.cs
+30 -27
View File
@@ -1,6 +1,6 @@
//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="RegexLexer"
// file="RegexTokenReader"
// Project: StgSharp
// AuthorGroup: Nitload
// Copyright (c) Nitload. All rights reserved.
@@ -36,16 +36,18 @@ using System.Threading.Tasks;
namespace StgSharp.RegularAnalysis.TextRegex
{
internal class RegexLexer : IScriptTokenReader<RegexAstLabel>
internal class RegexTokenReader : ITokenReader<RegexElementLabel>
{
private static string _source;
private int position = 0;
public RegexTokenReader() { }
public bool IsEmpty => string.IsNullOrEmpty(_source) || position >= _source.Length;
public Token<RegexAstLabel> ReadToken()
public Token<RegexElementLabel> ReadToken()
{
int pos = position;
switch (_source[pos])
@@ -55,8 +57,8 @@ namespace StgSharp.RegularAnalysis.TextRegex
throw new InvalidOperationException("Unclosed char");
}
position = pos + 2;
return new Token<RegexAstLabel>(_source[(pos)..(pos + 2)], 0, pos,
RegexAstLabel.CHAR);
return new Token<RegexElementLabel>(_source[(pos)..(pos + 2)], 0, pos,
RegexElementLabel.UNIT);
case '[':
for (int i = pos + 1; i < _source.Length; i++)
{
@@ -64,8 +66,9 @@ namespace StgSharp.RegularAnalysis.TextRegex
{
int length = (i - pos - 1);
position = i + 1;
return new Token<RegexAstLabel>(_source[(pos - 1)..(i - 1)], 0,
position, RegexAstLabel.CHAR_SET);
return new Token<RegexElementLabel>(_source[(pos - 1)..(i - 1)], 0,
position,
RegexElementLabel.CHAR_SET);
}
}
throw new InvalidOperationException("Unclosed character set");
@@ -75,54 +78,54 @@ namespace StgSharp.RegularAnalysis.TextRegex
return ReadGroupBeginToken();
case ')':
position = pos + 1;
return new Token<RegexAstLabel>(_source[(pos)..1], 0, pos,
RegexAstLabel.GROUP_END);
return new Token<RegexElementLabel>(_source[(pos)..1], 0, pos,
RegexElementLabel.GROUP_END);
case '{':
for (int i = pos + 1; i < _source.Length; i++)
{
if (_source[i] == '}')
{
position = i + 1;
return new Token<RegexAstLabel>(_source[(pos)..(i - 1)], 0, pos,
RegexAstLabel.COUNT);
return new Token<RegexElementLabel>(_source[(pos)..(i - 1)], 0, pos,
RegexElementLabel.COUNT);
}
}
throw new InvalidOperationException("Unclosed count specifier");
case '*' or '+':
int count = _source[pos + 1] == '?' ? 2 : 1;
position = pos + count;
return new Token<RegexAstLabel>(_source[(pos)..(pos + count)], 0, pos,
RegexAstLabel.COUNT);
return new Token<RegexElementLabel>(_source[(pos)..(pos + count)], 0, pos,
RegexElementLabel.COUNT);
case '?':
position = pos + 1;
return new Token<RegexAstLabel>(_source[(pos)..(pos + 1)], 0, pos,
RegexAstLabel.COUNT);
return new Token<RegexElementLabel>(_source[(pos)..(pos + 1)], 0, pos,
RegexElementLabel.COUNT);
case '.':
return new Token<RegexAstLabel>(_source[(pos)..(pos + 1)], 0, pos,
RegexAstLabel.CHAR_SET);
return new Token<RegexElementLabel>(_source[(pos)..(pos + 1)], 0, pos,
RegexElementLabel.UNIT);
default:
position = pos + 1;
return new Token<RegexAstLabel>(_source[(pos)..(pos + 1)], 0, pos,
RegexAstLabel.CHAR);
return new Token<RegexElementLabel>(_source[(pos)..(pos + 1)], 0, pos,
RegexElementLabel.UNIT);
}
}
public bool TryReadToken(
out Token<RegexAstLabel> t
out Token<RegexElementLabel> t
)
{
if (IsEmpty)
{
t = Token<RegexAstLabel>.Empty;
t = Token<RegexElementLabel>.Empty;
return false;
}
t = ReadToken();
return Token<RegexAstLabel>.Empty == t;
return Token<RegexElementLabel>.Empty == t;
}
private Token<RegexAstLabel> ReadGroupBeginToken()
private Token<RegexElementLabel> ReadGroupBeginToken()
{
if (_source is null) {
if (IsEmpty) {
throw new InvalidOperationException("Source is null.");
}
@@ -136,7 +139,7 @@ namespace StgSharp.RegularAnalysis.TextRegex
if (start + 1 >= _source.Length || _source[start + 1] != '?')
{
position = start + 1;
return new Token<RegexAstLabel>("(", 0, start, RegexAstLabel.GROUP_BEGIN);
return new Token<RegexElementLabel>("(", 0, start, RegexElementLabel.GROUP_BEGIN);
}
// From here we have "(?"
@@ -151,7 +154,7 @@ namespace StgSharp.RegularAnalysis.TextRegex
if (c2 == ':')
{
position = start + 3;
return new Token<RegexAstLabel>("(?:", 0, start, RegexAstLabel.GROUP_BEGIN);
return new Token<RegexElementLabel>("(?:", 0, start, RegexElementLabel.GROUP_BEGIN);
}
// Assertions (write the first-level cases, but not supported yet)
@@ -232,7 +235,7 @@ namespace StgSharp.RegularAnalysis.TextRegex
string text = _source.Substring(start, consumedLen);
position = start + consumedLen;
return new Token<RegexAstLabel>(text, 0, start, RegexAstLabel.GROUP_BEGIN);
return new Token<RegexElementLabel>(text, 0, start, RegexElementLabel.GROUP_BEGIN);
}
// Optional: comments "(?#...)" or inline options "(?i:...)" etc.