67 lines
2.1 KiB
C#
67 lines
2.1 KiB
C#
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/*
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Copyright (C) 2014-2019 de4dot@gmail.com
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This file is part of dnSpy
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dnSpy is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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dnSpy is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with dnSpy. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using dnSpy.Contracts.Decompiler;
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namespace dnSpy.Debugger.DotNet.Disassembly {
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struct SourceStatementProvider {
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readonly string text;
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readonly MethodDebugInfo debugInfo;
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SourceStatement? lastStatement;
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public SourceStatementProvider(string text, MethodDebugInfo debugInfo) {
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this.text = text ?? throw new ArgumentNullException(nameof(text));
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this.debugInfo = debugInfo ?? throw new ArgumentNullException(nameof(debugInfo));
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lastStatement = null;
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}
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public (string line, TextSpan span) GetStatement(int ilOffset) {
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var text = this.text;
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var debugInfo = this.debugInfo;
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if (text is null || debugInfo is null)
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return default;
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var lastStatement = this.lastStatement;
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var stmt = debugInfo.GetSourceStatementByCodeOffset((uint)ilOffset);
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this.lastStatement = stmt;
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if (stmt is null)
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return default;
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if (lastStatement == stmt)
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return default;
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return GetStatement(stmt.Value.TextSpan, text);
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}
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internal static (string line, TextSpan span) GetStatement(TextSpan span, string text) {
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int startPos = span.Start;
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while (startPos > 0 && text[startPos - 1] != '\n')
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startPos--;
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var endPos = span.End;
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while (endPos < text.Length) {
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var c = text[endPos];
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if (c == '\r' || c == '\n')
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break;
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endPos++;
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}
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var line = text.Substring(startPos, endPos - startPos);
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return (line, new TextSpan(span.Start - startPos, span.Length));
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}
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}
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}
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