/// <summary>
/// Compares two sets of file segments and the segment contents.
/// </summary>
/// <param name="originalSegments">The original set of file segments.</param>
/// <param name="originalReader">The stream to use to read from the original file.</param>
/// <param name="newSegments">The modified set of file segments.</param>
/// <param name="newReader">The stream to use to read from the modified file.</param>
/// <returns>The differences that were found.</returns>
public static List <SegmentChange> CompareSegments(IEnumerable <FileSegment> originalSegments, IReader originalReader,
IEnumerable <FileSegment> newSegments, IReader newReader)
{
List <FileSegment> originalList = originalSegments.ToList();
List <FileSegment> newList = newSegments.ToList();
if (originalList.Count != newList.Count)
{
throw new InvalidOperationException("The files have different segment counts");
}
var results = new List <SegmentChange>();
for (int i = 0; i < originalList.Count; i++)
{
FileSegment originalSegment = originalList[i];
FileSegment newSegment = newList[i];
List <DataChange> changes = DataComparer.CompareData(originalReader, (uint)originalSegment.Offset,
originalSegment.ActualSize, newReader, (uint)newSegment.Offset, newSegment.ActualSize,
originalSegment.ResizeOrigin != SegmentResizeOrigin.Beginning);
if (changes.Count > 0 || originalSegment.Size != newSegment.Size)
{
var change = new SegmentChange((uint)originalSegment.Offset, originalSegment.ActualSize, (uint)newSegment.Offset,
newSegment.ActualSize, originalSegment.ResizeOrigin != SegmentResizeOrigin.Beginning);
change.DataChanges.AddRange(changes);
results.Add(change);
}
}
return(results);
}
public static Patch LoadPatch(IReader reader, bool isAlteration)
{
Patch patch = new Patch();
SegmentChange change = new SegmentChange(0, 0, 0, 0, true);
patch.Author = "Ascension/Alteration Patch";
patch.Description = "Ascension/Alteration Patch";
if (isAlteration)
{
//do shitty alteration stuff
byte authorLength = reader.ReadByte();
patch.Author = reader.ReadAscii((int)authorLength);
byte descLength = reader.ReadByte();
patch.Description = reader.ReadAscii((int)descLength);
}
//create ascension patch object and change segment
while (!reader.EOF)
{
//get valuable info
var segmentOffset = reader.ReadUInt32();
var segmentSize = reader.ReadInt32();
var segmentData = reader.ReadBlock(segmentSize);
//Add change data
change.DataChanges.Add(new DataChange(segmentOffset, segmentData));
}
patch.SegmentChanges.Add(change);
return patch;
}
/// <summary>
/// Compares two sets of file segments and the segment contents.
/// </summary>
/// <param name="originalSegments">The original set of file segments.</param>
/// <param name="originalReader">The stream to use to read from the original file.</param>
/// <param name="newSegments">The modified set of file segments.</param>
/// <param name="newReader">The stream to use to read from the modified file.</param>
/// <returns>The differences that were found.</returns>
public static List<SegmentChange> CompareSegments(IEnumerable<FileSegment> originalSegments, IReader originalReader,
IEnumerable<FileSegment> newSegments, IReader newReader)
{
List<FileSegment> originalList = originalSegments.ToList();
List<FileSegment> newList = newSegments.ToList();
if (originalList.Count != newList.Count)
throw new InvalidOperationException("The files have different segment counts");
var results = new List<SegmentChange>();
for (int i = 0; i < originalList.Count; i++)
{
FileSegment originalSegment = originalList[i];
FileSegment newSegment = newList[i];
List<DataChange> changes = DataComparer.CompareData(originalReader, (uint) originalSegment.Offset,
originalSegment.ActualSize, newReader, (uint) newSegment.Offset, newSegment.ActualSize,
originalSegment.ResizeOrigin != SegmentResizeOrigin.Beginning);
if (changes.Count > 0 || originalSegment.Size != newSegment.Size)
{
var change = new SegmentChange((uint) originalSegment.Offset, originalSegment.ActualSize, (uint) newSegment.Offset,
newSegment.ActualSize, originalSegment.ResizeOrigin != SegmentResizeOrigin.Beginning);
change.DataChanges.AddRange(changes);
results.Add(change);
}
}
return results;
}
public static Patch LoadPatch(IReader reader, bool isAlteration)
{
var patch = new Patch();
var change = new SegmentChange(0, 0, 0, 0, true);
patch.Author = "Ascension/Alteration Patch";
patch.Description = "Ascension/Alteration Patch";
if (isAlteration)
{
//do shitty alteration stuff
byte authorLength = reader.ReadByte();
patch.Author = reader.ReadAscii(authorLength);
byte descLength = reader.ReadByte();
patch.Description = reader.ReadAscii(descLength);
}
//create ascension patch object and change segment
while (!reader.EOF)
{
//get valuable info
uint segmentOffset = reader.ReadUInt32();
int segmentSize = reader.ReadInt32();
byte[] segmentData = reader.ReadBlock(segmentSize);
//Add change data
change.DataChanges.Add(new DataChange(segmentOffset, segmentData));
}
patch.SegmentChanges.Add(change);
return(patch);
}
private static void ReadSegmentChanges(IReader reader, Patch output)
{
// Version 0 (all versions)
byte numChanges = reader.ReadByte();
for (int i = 0; i < numChanges; i++)
{
uint oldOffset = reader.ReadUInt32();
int oldSize = reader.ReadInt32();
uint newOffset = reader.ReadUInt32();
int newSize = reader.ReadInt32();
bool resizeAtEnd = Convert.ToBoolean(reader.ReadByte());
var segmentChange = new SegmentChange(oldOffset, oldSize, newOffset, newSize, resizeAtEnd);
segmentChange.DataChanges.AddRange(ReadDataChanges(reader));
output.SegmentChanges.Add(segmentChange);
}
}
private static void ReadSegmentChanges(IReader reader, byte version, Patch output)
{
if (version > 0)
{
throw new NotSupportedException("Unrecognized \"segm\" block version");
}
// Version 0 (all versions)
byte numChanges = reader.ReadByte();
for (int i = 0; i < numChanges; i++)
{
uint oldOffset = reader.ReadUInt32();
int oldSize = reader.ReadInt32();
uint newOffset = reader.ReadUInt32();
int newSize = reader.ReadInt32();
bool resizeAtEnd = Convert.ToBoolean(reader.ReadByte());
var segmentChange = new SegmentChange(oldOffset, oldSize, newOffset, newSize, resizeAtEnd);
segmentChange.DataChanges.AddRange(ReadDataChanges(reader));
output.SegmentChanges.Add(segmentChange);
}
}
private static void ReadSegmentChanges(IReader reader, Patch output)
{
// ReSharper disable UnusedVariable
var version = reader.ReadByte();
// ReSharper restore UnusedVariable
// Version 0 (all versions)
var numChanges = reader.ReadByte();
for (var i = 0; i < numChanges; i++)
{
var oldOffset = reader.ReadUInt32();
var oldSize = reader.ReadInt32();
var newOffset = reader.ReadUInt32();
var newSize = reader.ReadInt32();
var resizeAtEnd = Convert.ToBoolean(reader.ReadByte());
var segmentChange = new SegmentChange(oldOffset, oldSize, newOffset, newSize, resizeAtEnd);
segmentChange.DataChanges.AddRange(ReadDataChanges(reader));
output.SegmentChanges.Add(segmentChange);
}
}
private static void ReadSegmentChanges(IReader reader, Patch output)
{
// Version 0 (all versions)
byte numChanges = reader.ReadByte();
for (int i = 0; i < numChanges; i++)
{
uint oldOffset = reader.ReadUInt32();
int oldSize = reader.ReadInt32();
uint newOffset = reader.ReadUInt32();
int newSize = reader.ReadInt32();
bool resizeAtEnd = Convert.ToBoolean(reader.ReadByte());
var segmentChange = new SegmentChange(oldOffset, oldSize, newOffset, newSize, resizeAtEnd);
segmentChange.DataChanges.AddRange(ReadDataChanges(reader));
output.SegmentChanges.Add(segmentChange);
}
}
