public void CompareTo(ref FileItem Other, ref List <FileComparisonItem> Output)
{
File.Dispose();
Other.File.Dispose();
OpenFile();
Other.OpenFile();
File.Seek(0, SeekOrigin.Begin);
Other.File.Seek(0, SeekOrigin.Begin);
//const int StreamSize = 4096;
long CurrentLine = 0, CurrentOffset = 0;
bool FileLimitReached = false, FoundInCopy = false;
using (StreamReader FileParser = new StreamReader(File)){
using (StreamReader OtherFileParser = new StreamReader(Other.File)) {
long Variation = 0;
while (!FileParser.EndOfStream)
{
var OriginalOffset = File.Position;
Variation = 0;
// Case 1 : No more lines in the other file
string OriginalContentCopy;
if (OtherFileParser.EndOfStream)
{
var Fcr = new FileComparisonItem()
{
StartingLine = Other.TotalLine + 1,
ChangeSet = new List <String>(),
changeType = ChangeType.RemovedContent
};
while (!FileParser.EndOfStream)
{
Variation++;
OriginalContentCopy = FileParser.ReadLine();
Fcr.ChangeSet.Add(OriginalContentCopy);
}
Fcr.EndLine = (int)(CurrentLine + Variation);
Output.Add(Fcr);
Variation = 0;
break;
}
var OriginalContent = FileParser.ReadLine();
var NewContent = OtherFileParser.ReadLine();
var AtLeastOneChange = !OriginalContent.Equals(NewContent);
CurrentLine++;
var MovingOffset = Other.File.Position;
// Case 2 : At least one string changed
if (AtLeastOneChange)
{
CurrentOffset = Other.File.Position;
}
while (AtLeastOneChange && !OtherFileParser.EndOfStream)
{
var NewContentCopy = OtherFileParser.ReadLine();
Variation++;
if (!NewContentCopy.Equals(OriginalContent))
{
MovingOffset = Other.File.Position;
continue;
}
FoundInCopy = true;
long ThisOffset = (MovingOffset >= 0 ? MovingOffset : Other.File.Position);
var Fcr = new FileComparisonItem()
{
StartingLine = (int)CurrentLine,
EndLine = (int)(CurrentLine + Variation),
ChangeSet = new List <String>(),
changeType = ChangeType.NewContent
};
Other.File.Seek(CurrentOffset, SeekOrigin.Begin);
while (!OtherFileParser.EndOfStream && Other.File.Position != ThisOffset)
{
Fcr.ChangeSet.Add(OtherFileParser.ReadLine());
}
NewContentCopy = OtherFileParser.ReadLine();
Output.Add(Fcr);
CurrentOffset = ThisOffset;
AtLeastOneChange = false;
break;
}
if (AtLeastOneChange && !FoundInCopy)
{
Other.File.Seek(CurrentOffset, SeekOrigin.Begin);
CurrentOffset = MovingOffset = File.Position;
Variation = 0;
}
// Case 3 : Cannot find changes in the other file, check the original doc
while (AtLeastOneChange && !FoundInCopy && !FileParser.EndOfStream)
{
OriginalContentCopy = FileParser.ReadLine();
Variation++;
if (!NewContent.Equals(OriginalContentCopy))
{
MovingOffset = File.Position;
continue;
}
long ThisOffset = (MovingOffset >= 0 ? MovingOffset : File.Position);
var Fcr = new FileComparisonItem()
{
StartingLine = (int)CurrentLine,
EndLine = (int)(CurrentLine + Variation),
ChangeSet = new List <String>(),
changeType = ChangeType.RemovedContent
};
File.Seek(OriginalOffset, SeekOrigin.Begin);
while (!FileParser.EndOfStream && File.Position != ThisOffset)
{
Fcr.ChangeSet.Add(FileParser.ReadLine());
}
OriginalContentCopy = FileParser.ReadLine();
CurrentOffset = ThisOffset;
Output.Add(Fcr);
AtLeastOneChange = false;
break;
}
if (AtLeastOneChange)
{
File.Seek(CurrentOffset, SeekOrigin.Begin);
AtLeastOneChange = false;
Output.Add(new FileComparisonItem()
{
StartingLine = (int)CurrentLine,
EndLine = (int)(CurrentLine),
ChangeSet = new List <String>()
{
OriginalContent
},
changeType = ChangeType.LineChange
});
}
}
// Final case: new Lines in the modified file
if (FileParser.EndOfStream && !OtherFileParser.EndOfStream)
{
var Fcr = new FileComparisonItem()
{
StartingLine = TotalLine + 1,
ChangeSet = new List <String>(),
changeType = ChangeType.NewContent
};
Variation = 0;
while (!OtherFileParser.EndOfStream)
{
Variation++;
Fcr.ChangeSet.Add(OtherFileParser.ReadLine());
}
Fcr.EndLine = (int)(TotalLine + Variation);
Output.Add(Fcr);
}
File.Seek(0, SeekOrigin.Begin);
Other.File.Seek(0, SeekOrigin.Begin);
}
}
}
public void CompareTo_2(ref FileItem Other, ref List <FileComparisonItem> Output)
{
string[] OriginalScript = System.IO.File.ReadAllLines(Absolute),
ModifiedScript = System.IO.File.ReadAllLines(Other.Absolute);
//const int StreamSize = 4096;
long CurrentLine = 0,
CurrentOffset = 0,
OriginalReadingBufferIndex = 0,
ModifiedReadingBufferIndex = 0;
bool FoundInCopy = false;
Func <long, String[], bool> EndOfStream =
(long Buffer, String[] Script) => Buffer == Script.LongLength;
long Variation = 0;
while (!EndOfStream(OriginalReadingBufferIndex, OriginalScript))
{
var OriginalOffset = OriginalReadingBufferIndex;
Variation = 0;
// Case 1 : No more lines in the other file
string OriginalContentCopy;
if (EndOfStream(ModifiedReadingBufferIndex, ModifiedScript))
{
var Fcr = new FileComparisonItem()
{
StartingLine = Other.TotalLine + 1,
ChangeSet = new List <String>(),
changeType = ChangeType.RemovedContent
};
while (!EndOfStream(OriginalReadingBufferIndex, OriginalScript))
{
Variation++;
OriginalContentCopy = OriginalScript[OriginalReadingBufferIndex];
OriginalReadingBufferIndex++;
Fcr.ChangeSet.Add(OriginalContentCopy);
}
Fcr.EndLine = (int)(CurrentLine + Variation);
Output.Add(Fcr);
Variation = 0;
break;
}
var OriginalContent = OriginalScript[OriginalReadingBufferIndex++];
var NewContent = ModifiedScript[ModifiedReadingBufferIndex++];
var AtLeastOneChange = !OriginalContent.Equals(NewContent);
CurrentLine++;
var MovingOffset = ModifiedReadingBufferIndex;
// Case 2 : At least one string changed
if (AtLeastOneChange)
{
CurrentOffset = ModifiedReadingBufferIndex;
}
while (AtLeastOneChange && !EndOfStream(ModifiedReadingBufferIndex, ModifiedScript))
{
var NewContentCopy = ModifiedScript[ModifiedReadingBufferIndex++];
Variation++;
if (!NewContentCopy.Equals(OriginalContent))
{
MovingOffset = ModifiedReadingBufferIndex;
continue;
}
FoundInCopy = true;
long ThisOffset = (MovingOffset >= 0 ? MovingOffset : ModifiedReadingBufferIndex);
var Fcr = new FileComparisonItem()
{
StartingLine = (int)CurrentLine,
EndLine = (int)(CurrentLine + Variation),
ChangeSet = new List <String>(),
changeType = ChangeType.NewContent
};
ModifiedReadingBufferIndex = CurrentOffset;
while (!EndOfStream(ModifiedReadingBufferIndex, ModifiedScript) && ModifiedReadingBufferIndex != ThisOffset)
{
Fcr.ChangeSet.Add(ModifiedScript[ModifiedReadingBufferIndex++]);
}
NewContentCopy = ModifiedScript[ModifiedReadingBufferIndex++];
Output.Add(Fcr);
CurrentOffset = ThisOffset;
AtLeastOneChange = false;
break;
}
if (AtLeastOneChange && !FoundInCopy)
{
ModifiedReadingBufferIndex = CurrentOffset;
CurrentOffset = MovingOffset = OriginalReadingBufferIndex;
Variation = 0;
}
// Case 3 : Cannot find changes in the other file, check the original doc
while (AtLeastOneChange && !FoundInCopy && !EndOfStream(OriginalReadingBufferIndex, OriginalScript))
{
OriginalContentCopy = OriginalScript[OriginalReadingBufferIndex++];
Variation++;
if (!NewContent.Equals(OriginalContentCopy))
{
MovingOffset = OriginalReadingBufferIndex;
continue;
}
long ThisOffset = (MovingOffset >= 0 ? MovingOffset : OriginalReadingBufferIndex);
var Fcr = new FileComparisonItem()
{
StartingLine = (int)CurrentLine,
EndLine = (int)(CurrentLine + Variation),
ChangeSet = new List <String>(),
changeType = ChangeType.RemovedContent
};
OriginalReadingBufferIndex = OriginalOffset;
while (!EndOfStream(OriginalReadingBufferIndex, OriginalScript) && OriginalReadingBufferIndex != ThisOffset)
{
Fcr.ChangeSet.Add(OriginalScript[OriginalReadingBufferIndex++]);
}
OriginalContentCopy = OriginalScript[OriginalReadingBufferIndex++];
CurrentOffset = ThisOffset;
Output.Add(Fcr);
AtLeastOneChange = false;
break;
}
if (AtLeastOneChange)
{
OriginalReadingBufferIndex = (CurrentOffset);
AtLeastOneChange = false;
Output.Add(new FileComparisonItem()
{
StartingLine = (int)CurrentLine,
EndLine = (int)(CurrentLine),
ChangeSet = new List <String>()
{
NewContent
},
changeType = ChangeType.LineChange
});
}
}
// Final case: new Lines in the modified file
if (EndOfStream(OriginalReadingBufferIndex, OriginalScript) && !EndOfStream(ModifiedReadingBufferIndex, ModifiedScript))
{
var Fcr = new FileComparisonItem()
{
StartingLine = TotalLine + 1,
ChangeSet = new List <String>(),
changeType = ChangeType.NewContent
};
Variation = 0;
while (!EndOfStream(ModifiedReadingBufferIndex, ModifiedScript))
{
Variation++;
Fcr.ChangeSet.Add(ModifiedScript[ModifiedReadingBufferIndex++]);
}
Fcr.EndLine = (int)(TotalLine + Variation);
Output.Add(Fcr);
}
}