building regex parser

This commit is contained in:
Youmu Liu
2026-02-05 18:35:42 +08:00
parent f22e90af55
commit 1bfb8b67c4
6 changed files with 342 additions and 316 deletions
@@ -41,327 +41,129 @@ namespace StgSharp.RegularAnalysis.Abstraction
where TLabel : unmanaged
{
private Token<TLabel>? _lastToken;
private TNode[] _nodeArray = new TNode[4];
private Token<TLabel>[] _operatorArray = new Token<TLabel>[4];
private Token<TLabel>[] _tokenArray = new Token<TLabel>[4];
private int _nodeCount,_tokenCount, _operatorCount;
private RandomAccessibleStack<CompileDepthMark> _depthStack = new RandomAccessibleStack<CompileDepthMark>(
);
private RandomAccessibleStack<OperandIndex> _isNode = new RandomAccessibleStack<OperandIndex>(
8);
private Stack<Stack<TNode>> _statementCache = new Stack<Stack<TNode>>();
private TNode _lastNode;
private readonly RandomAccessibleStack<DepthMark> _depthMarks = [];
private readonly RandomAccessibleStack<TNode> _operands = [];
private readonly RandomAccessibleStack<TNode> _operators = [];
public CompileStack()
{
_depthStack.Push(new CompileDepthMark(0, 0, 0, null!));
_statementCache.Push(new Stack<TNode>());
_depthMarks.Push(new DepthMark(0, 0));
}
public bool IsLastAddedOperator { get; private set; }
public CompileDepthMark CurrentDepthMark
public int OperandInDepthCount
{
get => _depthStack.Peek();
[MethodImpl(MethodImplOptions.AggressiveInlining)]
get => _operands.Count - _depthMarks.Peek().OperandPos;
}
public int Depth => _depthStack.Count;
public int OperandCount => _isNode.Count;
public int OperatorCount => _operatorCount;
public int OperatorAheadOfDepth
public int OperatorInDepthCount
{
get => OperatorCount - _depthStack.Peek().OperatorBegin;
[MethodImpl(MethodImplOptions.AggressiveInlining)]
get => _operands.Count - _depthMarks.Peek().OperandPos;
}
public int OperandAheadOfDepth
public int Depth
{
get => OperandCount - _depthStack.Peek().OperandBegin;
[MethodImpl(MethodImplOptions.AggressiveInlining)]
get => _depthMarks.Count;
}
public Stack<TNode> StatementsInDepth
{
get => _statementCache.Peek();
}
public void DecreaseDepth()
{
CompileDepthMark mark = _depthStack.Pop();
Stack<TNode> statementsInDepth = _statementCache.Pop();
}
public bool GetOperandAt(
Index i,
out TNode operandNode,
out Token<TLabel> operandToken
)
{
OperandIndex index = _isNode[i];
if (index.IsNode)
{
operandNode = _nodeArray[index.Index];
operandToken = Token<TLabel>.Empty;
return true;
} else
{
operandToken = _tokenArray[index.Index];
operandNode = default!;
return false;
}
}
public bool GetOperandAt(
CompileDepthMark depth,
Index i,
out Token<TLabel> operandToken,
out TNode operandNode
)
{
OperandIndex index = _isNode[i];
_depthStack.Contains(depth);
if (index.IsNode)
{
operandNode = _nodeArray[index.Index];
operandToken = Token<TLabel>.Empty;
return true;
} else
{
operandToken = _tokenArray[index.Index];
operandNode = default!;
return false;
}
}
public CompileDepthMark IncreaseDepth(
int usage
)
{
CompileDepthMark mark =
new CompileDepthMark(OperatorCount, OperandCount, usage);
_depthStack.Push(mark);
_statementCache.Push(new Stack<TNode>());
return mark;
}
public TNode PackAllStatements()
{
if (StatementsInDepth.Count == 0) {
return TNode.Empty;
}
TNode end = StatementsInDepth.Peek();
TNode first = end;
while (StatementsInDepth.Count > 0)
{
first = StatementsInDepth.Pop();
end.PrependNode(first);
end = first;
}
return first;
}
public bool PeekOperand(
out Token<TLabel> t,
out TNode n
)
{
if (OperandAheadOfDepth <= 0)
{
t = Token<TLabel>.Empty;
n = TNode.Empty;
return false;
}
if (_isNode.Pop().IsNode)
{
t = Token<TLabel>.Empty;
n = _nodeArray[_nodeCount - 1];
return true;
} else
{
t = _tokenArray[_tokenCount - 1];
n = TNode.Empty;
return false;
}
}
public Token<TLabel> PeekOperator()
{
if (OperatorAheadOfDepth > 0) {
return _operatorArray[_operatorCount - 1];
}
return Token<TLabel>.Empty;
}
public bool PopOperand(
out Token<TLabel> t,
out TNode n
)
{
if (OperandAheadOfDepth <= 0)
{
t = Token<TLabel>.Empty;
n = TNode.Empty;
return false;
}
if (_isNode.Pop().IsNode)
{
t = Token<TLabel>.Empty;
n = _nodeArray[--_nodeCount];
return true;
} else
{
t = _tokenArray[--_tokenCount];
n = TNode.Empty;
return false;
}
}
public Token<TLabel> PopOperator()
{
if (OperatorAheadOfDepth > 0)
{
_operatorCount--;
return _operatorArray[_operatorCount];
}
return Token<TLabel>.Empty;
}
public void PushOperand(
TNode node
)
{
if (_nodeArray.Length == _nodeCount) {
Array.Resize(ref _nodeArray, _nodeArray.Length * 2);
}
_nodeArray[_nodeCount] = node;
_isNode.Push(new(true, _nodeCount));
_nodeCount++;
IsLastAddedOperator = false;
}
public void PushOperand(
Token<TLabel> token
)
{
if (_tokenArray.Length == _tokenCount) {
Array.Resize(ref _tokenArray, _tokenArray.Length * 2);
}
_tokenArray[_tokenCount] = token;
_isNode.Push(new(false, _tokenCount));
_tokenCount++;
IsLastAddedOperator = false;
}
public void PushOperator(
Token<TLabel> token
)
{
if (_operatorArray.Length == _operatorCount) {
Array.Resize(ref _operatorArray, _operatorArray.Length * 2);
}
_operatorArray[_operatorCount] = token;
_operatorCount++;
IsLastAddedOperator = true;
}
public T StateOfCurrentDepth<T>() where T : class, ICompileDepthState
{
return (CurrentDepthMark.StateCache as T)!;
}
public bool TryPeekOperand(
out bool isNode,
out Token<TLabel> t,
out TNode n
)
{
if (OperandAheadOfDepth <= 0)
{
t = Token<TLabel>.Empty;
n = TNode.Empty;
isNode = false;
return false;
}
if (_isNode.Pop().IsNode)
{
t = Token<TLabel>.Empty;
n = _nodeArray[_nodeCount - 1];
isNode = true;
return true;
} else
{
t = _tokenArray[_tokenCount - 1];
n = TNode.Empty;
isNode = false;
return false;
}
}
public bool TryPeekOperator(
out Token<TLabel> op
)
{
if (OperatorAheadOfDepth > 0)
{
op = _operatorArray[_operatorCount - 1];
return true;
}
op = Token<TLabel>.Empty;
return false;
}
public bool TryPopOperand(
out bool isNode,
out Token<TLabel> t,
out TNode n
)
{
if (OperandAheadOfDepth <= 0)
{
t = Token<TLabel>.Empty;
n = TNode.Empty;
isNode = false;
return false;
}
if (_isNode.Pop().IsNode)
{
t = Token<TLabel>.Empty;
n = _nodeArray[--_nodeCount];
isNode = true;
return true;
} else
{
t = _tokenArray[--_tokenCount];
n = TNode.Empty;
isNode = false;
return true;
}
}
public bool TryPopOperator(
out Token<TLabel> op
)
{
if (OperatorAheadOfDepth > 0)
{
op = _operatorArray[--_operatorCount];
return true;
}
op = Token<TLabel>.Empty;
return false;
}
private record struct OperandIndex(
bool IsNode,
int Index
private record struct DepthMark(
int OperandPos,
int OperatorPos,
int Mark
);
#region operator
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public TNode PopOperator(
)
{
if (OperatorInDepthCount > 0) {
return _operators.Pop();
}
return TNode.Empty;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void PushOperator(
TNode operatorNode
)
{
_operators.Push(operatorNode);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public bool TryPopOperator(
out TNode op
)
{
if (OperatorInDepthCount > 0)
{
op = _operators.Pop();
return true;
}
op = TNode.Empty;
return false;
}
#endregion
#region operand
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public TNode PopOperand(
)
{
if (OperatorInDepthCount > 0) {
return _operators.Pop();
}
return TNode.Empty;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void PushOperand(
TNode operatorNode
)
{
_operators.Push(operatorNode);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public bool TryPopOperand(
out TNode op
)
{
if (OperandInDepthCount > 0)
{
op = _operands.Pop();
return true;
}
op = TNode.Empty;
return false;
}
#endregion
#region depth
public void DecreaseDepth(
)
{
if (Depth > 1)
{
DepthMark mark = _depthMarks.Pop();
}
}
public void IncreaseDepth(
int mark
)
{
_depthMarks.Push(new DepthMark(_operands.Count, _operators.Count, mark));
}
#endregion
}
}
@@ -49,9 +49,9 @@ namespace StgSharp.RegularAnalysis.Abstraction
TNode Next { get; set; }
TNode Left { get; }
TNode Left { get; set; }
TNode Right { get; }
TNode Right { get; set; }
static abstract TNode Empty { get; }