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//------------------------------------------------------------------------------
// <copyright file="SourceLineInfo.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
//------------------------------------------------------------------------------
using System.Diagnostics;
namespace System.Xml.Xsl {
[DebuggerDisplay("({Line},{Pos})")]
internal struct Location {
private ulong value;
public int Line { get { return (int)(this.value >> 32); } }
public int Pos { get { return (int)(this.value ); } }
public Location(int line, int pos) {
this.value = (((ulong)line) << 32) | (uint)pos;
}
public Location(Location that) {
this.value = that.value;
}
public bool LessOrEqual(Location that) {
return this.value <= that.value;
}
}
[DebuggerDisplay("{Uri} [{StartLine},{StartPos} -- {EndLine},{EndPos}]")]
internal class SourceLineInfo : ISourceLineInfo {
protected string uriString;
protected Location start;
protected Location end;
public SourceLineInfo(string uriString, int startLine, int startPos, int endLine, int endPos)
: this(uriString, new Location(startLine, startPos), new Location(endLine, endPos))
{}
public SourceLineInfo(string uriString, Location start, Location end) {
this.uriString = uriString;
this.start = start;
this.end = end;
Validate(this);
}
public string Uri { get { return this.uriString ; } }
public int StartLine { get { return this.start.Line; } }
public int StartPos { get { return this.start.Pos ; } }
public int EndLine { get { return this.end.Line ; } }
public int EndPos { get { return this.end.Pos ; } }
public Location End { get { return this.end ; } }
public Location Start { get { return this.start ; } }
/// <summary>
/// Magic number 0xfeefee is used in PDB to denote a section of IL that does not map to any user code.
/// When VS debugger steps into IL marked with 0xfeefee, it will continue the step until it reaches
/// some user code.
/// </summary>
protected const int NoSourceMagicNumber = 0xfeefee;
public static SourceLineInfo NoSource = new SourceLineInfo(string.Empty, NoSourceMagicNumber, 0, NoSourceMagicNumber, 0);
public bool IsNoSource {
get { return this.StartLine == NoSourceMagicNumber; }
}
[Conditional("DEBUG")]
public static void Validate(ISourceLineInfo lineInfo) {
if (lineInfo.Start.Line == 0 || lineInfo.Start.Line == NoSourceMagicNumber) {
Debug.Assert(lineInfo.Start.Line == lineInfo.End.Line);
Debug.Assert(lineInfo.Start.Pos == 0 && lineInfo.End.Pos == 0);
} else {
Debug.Assert(0 < lineInfo.Start.Line && 0 < lineInfo.Start.Pos, "0 < start");
Debug.Assert(0 < lineInfo.End.Line && 0 < lineInfo.End.Pos , "0 < end");
Debug.Assert(lineInfo.Start.LessOrEqual(lineInfo.End), "start <= end");
}
}
// Returns file path for local and network URIs. Used for PDB generating and error reporting.
public static string GetFileName(string uriString) {
Debug.Assert(uriString != null);
Uri uri;
if (uriString.Length != 0 &&
System.Uri.TryCreate(uriString, UriKind.Absolute, out uri) &&
uri.IsFile
) {
return uri.LocalPath;
}
return uriString;
}
}
}
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