private PackParser.UnresolvedDelta FirstChildOf(PackedObjectInfo oe)
{
PackParser.UnresolvedDelta a = Reverse(RemoveBaseById(oe));
PackParser.UnresolvedDelta b = Reverse(baseByPos.Remove(oe.GetOffset()));
if (a == null)
{
return b;
}
if (b == null)
{
return a;
}
PackParser.UnresolvedDelta first = null;
PackParser.UnresolvedDelta last = null;
while (a != null || b != null)
{
PackParser.UnresolvedDelta curr;
if (b == null || (a != null && a.position < b.position))
{
curr = a;
a = a.next;
}
else
{
curr = b;
b = b.next;
}
if (last != null)
{
last.next = curr;
}
else
{
first = curr;
}
last = curr;
curr.next = null;
}
return first;
}
/// <exception cref="System.IO.IOException"></exception>
private void ResolveDeltas(PackedObjectInfo oe, ProgressMonitor progress)
{
PackParser.UnresolvedDelta children = FirstChildOf(oe);
if (children == null)
{
return;
}
PackParser.DeltaVisit visit = new PackParser.DeltaVisit();
visit.nextChild = children;
PackParser.ObjectTypeAndSize info = OpenDatabase(oe, new PackParser.ObjectTypeAndSize
());
switch (info.type)
{
case Constants.OBJ_COMMIT:
case Constants.OBJ_TREE:
case Constants.OBJ_BLOB:
case Constants.OBJ_TAG:
{
visit.data = InflateAndReturn(PackParser.Source.DATABASE, info.size);
visit.id = oe;
break;
}
default:
{
throw new IOException(MessageFormat.Format(JGitText.Get().unknownObjectType, Sharpen.Extensions.ValueOf
(info.type)));
}
}
if (!CheckCRC(oe.GetCRC()))
{
throw new IOException(MessageFormat.Format(JGitText.Get().corruptionDetectedReReadingAt
, Sharpen.Extensions.ValueOf(oe.GetOffset())));
}
ResolveDeltas(visit.Next(), info.type, info, progress);
}
internal static bool CanStore(PackedObjectInfo oe)
{
// We are limited to 4 GB per pack as offset is 32 bit unsigned int.
//
return (long)(((ulong)oe.GetOffset()) >> 1) < int.MaxValue;
}
/// <exception cref="System.IO.IOException"></exception>
protected internal override PackParser.ObjectTypeAndSize SeekDatabase(PackedObjectInfo
obj, PackParser.ObjectTypeAndSize info)
{
@out.Seek(obj.GetOffset());
crc.Reset();
return ReadObjectHeader(info);
}
/// <exception cref="System.IO.IOException"></exception>
private void FixThinPack(ProgressMonitor progress)
{
GrowEntries();
if (needBaseObjectIds)
{
baseObjectIds = new ObjectIdSubclassMap<ObjectId>();
}
packDigest.Reset();
originalEOF = packOut.Length() - 20;
Deflater def = new Deflater(Deflater.DEFAULT_COMPRESSION, false);
IList<IndexPack.DeltaChain> missing = new AList<IndexPack.DeltaChain>(64);
long end = originalEOF;
foreach (IndexPack.DeltaChain baseId in baseById)
{
if (baseId.head == null)
{
continue;
}
if (needBaseObjectIds)
{
baseObjectIds.Add(baseId);
}
ObjectLoader ldr;
try
{
ldr = readCurs.Open(baseId);
}
catch (MissingObjectException)
{
missing.AddItem(baseId);
continue;
}
byte[] data = ldr.GetCachedBytes(int.MaxValue);
int typeCode = ldr.GetType();
PackedObjectInfo oe;
crc.Reset();
packOut.Seek(end);
WriteWhole(def, typeCode, data);
oe = new PackedObjectInfo(end, (int)crc.GetValue(), baseId);
entries[entryCount++] = oe;
end = packOut.GetFilePointer();
ResolveChildDeltas(oe.GetOffset(), typeCode, data, oe);
if (progress.IsCancelled())
{
throw new IOException(JGitText.Get().downloadCancelledDuringIndexing);
}
}
def.Finish();
foreach (IndexPack.DeltaChain @base in missing)
{
if (@base.head != null)
{
throw new MissingObjectException(@base, "delta base");
}
}
if (end - originalEOF < 20)
{
// Ugly corner case; if what we appended on to complete deltas
// doesn't completely cover the SHA-1 we have to truncate off
// we need to shorten the file, otherwise we will include part
// of the old footer as object content.
packOut.SetLength(end);
}
FixHeaderFooter(packcsum, packDigest.Digest());
}
/// <exception cref="System.IO.IOException"></exception>
private void ResolveDeltas(PackedObjectInfo oe)
{
int oldCRC = oe.GetCRC();
if (baseById.Get(oe) != null || baseByPos.ContainsKey(oe.GetOffset()))
{
ResolveDeltas(oe.GetOffset(), oldCRC, Constants.OBJ_BAD, null, oe);
}
}
