/// <summary>Compares this abbreviation to a full object id.</summary>
/// <remarks>Compares this abbreviation to a full object id.</remarks>
/// <param name="other">the other object id.</param>
/// <returns>
/// <0 if this abbreviation names an object that is less than
/// <code>other</code>; 0 if this abbreviation exactly matches the
/// first
/// <see cref="Length()">Length()</see>
/// digits of <code>other.name()</code>;
/// >0 if this abbreviation names an object that is after
/// <code>other</code>.
/// </returns>
public int PrefixCompare(AnyObjectId other)
{
int cmp;
cmp = NB.CompareUInt32(w1, Mask(1, other.w1));
if (cmp != 0)
{
return(cmp);
}
cmp = NB.CompareUInt32(w2, Mask(2, other.w2));
if (cmp != 0)
{
return(cmp);
}
cmp = NB.CompareUInt32(w3, Mask(3, other.w3));
if (cmp != 0)
{
return(cmp);
}
cmp = NB.CompareUInt32(w4, Mask(4, other.w4));
if (cmp != 0)
{
return(cmp);
}
return(NB.CompareUInt32(w5, Mask(5, other.w5)));
}
/// <summary>Store an object for future lookup.</summary>
/// <remarks>
/// Store an object for future lookup.
/// <p>
/// Stores
/// <code>newValue</code>
/// , but only if there is not already an object for
/// the same object name. Callers can tell if the value is new by checking
/// the return value with reference equality:
/// <pre>
/// V obj = ...;
/// boolean wasNew = map.addIfAbsent(obj) == obj;
/// </pre>
/// </remarks>
/// <param name="newValue">the object to store.</param>
/// <returns>
///
/// <code>newValue</code>
/// if stored, or the prior value already stored and
/// that would have been returned had the caller used
/// <code>get(newValue)</code>
/// first.
/// </returns>
/// <?></?>
public virtual V AddIfAbsent <Q>(Q newValue) where Q : V
{
int i = ((ObjectId)newValue).w1 & mask;
V[] tbl = table;
int end = tbl.Length;
V obj;
while ((obj = tbl[i]) != null)
{
if (AnyObjectId.Equals(obj, newValue))
{
return(obj);
}
if (++i == end)
{
i = 0;
}
}
if (++size == grow)
{
Grow();
Insert(newValue);
}
else
{
tbl[i] = newValue;
}
return(newValue);
}
/// <summary>Compare this ObjectId to another and obtain a sort ordering.</summary>
/// <remarks>Compare this ObjectId to another and obtain a sort ordering.</remarks>
/// <param name="other">the other id to compare to. Must not be null.</param>
/// <returns>
/// < 0 if this id comes before other; 0 if this id is equal to
/// other; > 0 if this id comes after other.
/// </returns>
public int CompareTo(AnyObjectId other)
{
if (this == other)
{
return(0);
}
int cmp;
cmp = NB.CompareUInt32(w1, other.w1);
if (cmp != 0)
{
return(cmp);
}
cmp = NB.CompareUInt32(w2, other.w2);
if (cmp != 0)
{
return(cmp);
}
cmp = NB.CompareUInt32(w3, other.w3);
if (cmp != 0)
{
return(cmp);
}
cmp = NB.CompareUInt32(w4, other.w4);
if (cmp != 0)
{
return(cmp);
}
return(NB.CompareUInt32(w5, other.w5));
}
/// <summary>Copy an ObjectId into this mutable buffer.</summary>
/// <remarks>Copy an ObjectId into this mutable buffer.</remarks>
/// <param name="src">the source id to copy from.</param>
public virtual void FromObjectId(AnyObjectId src)
{
this.w1 = src.w1;
this.w2 = src.w2;
this.w3 = src.w3;
this.w4 = src.w4;
this.w5 = src.w5;
}
/// <summary>Initialize this instance by copying another existing ObjectId.</summary>
/// <remarks>
/// Initialize this instance by copying another existing ObjectId.
/// <p>
/// This constructor is mostly useful for subclasses who want to extend an
/// ObjectId with more properties, but initialize from an existing ObjectId
/// instance acquired by other means.
/// </remarks>
/// <param name="src">another already parsed ObjectId to copy the value out of.</param>
protected internal ObjectId(AnyObjectId src)
{
w1 = src.w1;
w2 = src.w2;
w3 = src.w3;
w4 = src.w4;
w5 = src.w5;
}
/// <exception cref="System.IO.IOException"></exception>
internal TrackingRefUpdate(Repository db, string localName, string remoteName, bool
forceUpdate, AnyObjectId nv, string msg)
{
this.remoteName = remoteName;
update = db.UpdateRef(localName);
update.SetForceUpdate(forceUpdate);
update.SetNewObjectId(nv);
update.SetRefLogMessage(msg, true);
}
internal TrackingRefUpdate(bool canForceUpdate, string remoteName, string localName
, AnyObjectId oldValue, AnyObjectId newValue)
{
this.remoteName = remoteName;
this.localName = localName;
this.forceUpdate = canForceUpdate;
this.oldObjectId = oldValue.Copy();
this.newObjectId = newValue.Copy();
}
/// <summary>Set the common ancestor tree.</summary>
/// <remarks>Set the common ancestor tree.</remarks>
/// <param name="id">
/// common base treeish; null to automatically compute the common
/// base from the input commits during
/// <see cref="Merge(NGit.AnyObjectId[])">Merge(NGit.AnyObjectId[])</see>
/// .
/// </param>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException">the object is not a treeish.
/// </exception>
/// <exception cref="NGit.Errors.MissingObjectException">the object does not exist.</exception>
/// <exception cref="System.IO.IOException">the object could not be read.</exception>
public virtual void SetBase(AnyObjectId id)
{
if (id != null)
{
baseTree = walk.ParseTree(id);
}
else
{
baseTree = null;
}
}
/// <summary>Does the requested object exist in this database?</summary>
/// <param name="objectId">identity of the object to test for existence of.</param>
/// <param name="typeHint">
/// hint about the type of object being requested;
/// <see cref="OBJ_ANY">OBJ_ANY</see>
/// if the object type is not known, or does not
/// matter to the caller.
/// </param>
/// <returns>true if the specified object is stored in this database.</returns>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException">
/// typeHint was not OBJ_ANY, and the object's actual type does
/// not match typeHint.
/// </exception>
/// <exception cref="System.IO.IOException">the object store cannot be accessed.</exception>
public virtual bool Has(AnyObjectId objectId, int typeHint)
{
try
{
Open(objectId, typeHint);
return(true);
}
catch (MissingObjectException)
{
return(false);
}
}
/// <summary>Parse an object from the unpacked object format.</summary>
/// <remarks>Parse an object from the unpacked object format.</remarks>
/// <param name="raw">complete contents of the compressed object.</param>
/// <param name="id">
/// expected ObjectId of the object, used only for error reporting
/// in exceptions.
/// </param>
/// <returns>loader to read the inflated contents.</returns>
/// <exception cref="System.IO.IOException">the object cannot be parsed.</exception>
public static ObjectLoader Parse(byte[] raw, AnyObjectId id)
{
WindowCursor wc = new WindowCursor(null);
try
{
return Open(new ByteArrayInputStream(raw), null, id, wc);
}
finally
{
wc.Release();
}
}
/// <exception cref="NGit.Errors.MissingObjectException"></exception>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException"></exception>
/// <exception cref="System.IO.IOException"></exception>
private static AnyObjectId AsTree(ObjectReader or, AnyObjectId treeish)
{
if (treeish is RevTree)
{
return(treeish);
}
if (treeish is RevCommit && ((RevCommit)treeish).Tree != null)
{
return(((RevCommit)treeish).Tree);
}
return(new RevWalk(or).ParseTree(treeish).Id);
}
/// <exception cref="System.IO.IOException"></exception>
private RefUpdate.Result UpdateImpl(RevWalk walk, RefUpdate.Store store)
{
RevObject newObj;
RevObject oldObj;
if (GetRefDatabase().IsNameConflicting(GetName()))
{
return(RefUpdate.Result.LOCK_FAILURE);
}
try
{
if (!TryLock(true))
{
return(RefUpdate.Result.LOCK_FAILURE);
}
if (expValue != null)
{
ObjectId o;
o = oldValue != null ? oldValue : ObjectId.ZeroId;
if (!AnyObjectId.Equals(expValue, o))
{
return(RefUpdate.Result.LOCK_FAILURE);
}
}
if (oldValue == null)
{
return(store.Execute(RefUpdate.Result.NEW));
}
newObj = SafeParse(walk, newValue);
oldObj = SafeParse(walk, oldValue);
if (newObj == oldObj && !detachingSymbolicRef)
{
return(store.Execute(RefUpdate.Result.NO_CHANGE));
}
if (newObj is RevCommit && oldObj is RevCommit)
{
if (walk.IsMergedInto((RevCommit)oldObj, (RevCommit)newObj))
{
return(store.Execute(RefUpdate.Result.FAST_FORWARD));
}
}
if (IsForceUpdate())
{
return(store.Execute(RefUpdate.Result.FORCED));
}
return(RefUpdate.Result.REJECTED);
}
finally
{
Unlock();
}
}
/// <exception cref="NGit.Errors.MissingObjectException"></exception>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException"></exception>
/// <exception cref="System.IO.IOException"></exception>
private static byte[] Read(Repository db, AnyObjectId blobId)
{
ObjectReader or = db.NewObjectReader();
try
{
return(Read(or, blobId));
}
finally
{
or.Release();
}
}
/// <summary>
/// Does the requested object exist in this database?
/// <p>
/// This is a one-shot call interface which may be faster than allocating a
/// <see cref="NewReader()">NewReader()</see>
/// to perform the lookup.
/// </summary>
/// <param name="objectId">identity of the object to test for existence of.</param>
/// <returns>true if the specified object is stored in this database.</returns>
/// <exception cref="System.IO.IOException">the object store cannot be accessed.</exception>
public virtual bool Has(AnyObjectId objectId)
{
ObjectReader or = NewReader();
try
{
return(or.Has(objectId));
}
finally
{
or.Release();
}
}
/// <summary>Open an object from this database.</summary>
/// <remarks>
/// Open an object from this database.
/// <p>
/// This is a one-shot call interface which may be faster than allocating a
/// <see cref="NewReader()">NewReader()</see>
/// to perform the lookup.
/// </remarks>
/// <param name="objectId">identity of the object to open.</param>
/// <param name="typeHint">
/// hint about the type of object being requested;
/// <see cref="ObjectReader.OBJ_ANY">ObjectReader.OBJ_ANY</see>
/// if the object type is not known,
/// or does not matter to the caller.
/// </param>
/// <returns>
/// a
/// <see cref="ObjectLoader">ObjectLoader</see>
/// for accessing the object.
/// </returns>
/// <exception cref="NGit.Errors.MissingObjectException">the object does not exist.</exception>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException">
/// typeHint was not OBJ_ANY, and the object's actual type does
/// not match typeHint.
/// </exception>
/// <exception cref="System.IO.IOException">the object store cannot be accessed.</exception>
public virtual ObjectLoader Open(AnyObjectId objectId, int typeHint)
{
ObjectReader or = NewReader();
try
{
return(or.Open(objectId, typeHint));
}
finally
{
or.Release();
}
}
/// <summary>Lookup an existing mapping.</summary>
/// <remarks>Lookup an existing mapping.</remarks>
/// <param name="toFind">the object identifier to find.</param>
/// <returns>the instance mapped to toFind, or null if no mapping exists.</returns>
public virtual V Get(AnyObjectId toFind)
{
int h = toFind.w1;
V obj = directory[h & mask][(int)(((uint)h) >> SEGMENT_SHIFT)];
for (; obj != null; obj = (V)obj.next)
{
if (Equals(obj, toFind))
{
return(obj);
}
}
return(null);
}
/// <summary>Add a parent onto the end of the parent list.</summary>
/// <remarks>Add a parent onto the end of the parent list.</remarks>
/// <param name="additionalParent">new parent to add onto the end of the current parent list.
/// </param>
public virtual void AddParentId(AnyObjectId additionalParent)
{
if (parentIds.Length == 0)
{
SetParentId(additionalParent);
}
else
{
ObjectId[] newParents = new ObjectId[parentIds.Length + 1];
System.Array.Copy(parentIds, 0, newParents, 0, parentIds.Length);
newParents[parentIds.Length] = additionalParent.Copy();
parentIds = newParents;
}
}
/// <exception cref="System.IO.IOException"></exception>
private static RevObject SafeParse(RevWalk rw, AnyObjectId id)
{
try
{
return(id != null?rw.ParseAny(id) : null);
}
catch (MissingObjectException)
{
// We can expect some objects to be missing, like if we are
// trying to force a deletion of a branch and the object it
// points to has been pruned from the database due to freak
// corruption accidents (it happens with 'git new-work-dir').
//
return(null);
}
}
/// <summary>Compare to object identifier byte sequences for equality.</summary>
/// <remarks>Compare to object identifier byte sequences for equality.</remarks>
/// <param name="firstObjectId">the first identifier to compare. Must not be null.</param>
/// <param name="secondObjectId">the second identifier to compare. Must not be null.</param>
/// <returns>true if the two identifiers are the same.</returns>
public static bool Equals(AnyObjectId firstObjectId, AnyObjectId secondObjectId)
{
if (firstObjectId == secondObjectId)
{
return(true);
}
// We test word 2 first as odds are someone already used our
// word 1 as a hash code, and applying that came up with these
// two instances we are comparing for equality. Therefore the
// first two words are very likely to be identical. We want to
// break away from collisions as quickly as possible.
//
return(firstObjectId.w2 == secondObjectId.w2 && firstObjectId.w3 == secondObjectId
.w3 && firstObjectId.w4 == secondObjectId.w4 && firstObjectId.w5 == secondObjectId
.w5 && firstObjectId.w1 == secondObjectId.w1);
}
/// <summary>Compare to object identifier byte sequences for equality.</summary>
/// <remarks>Compare to object identifier byte sequences for equality.</remarks>
/// <param name="firstObjectId">the first identifier to compare. Must not be null.</param>
/// <param name="secondObjectId">the second identifier to compare. Must not be null.</param>
/// <returns>true if the two identifiers are the same.</returns>
public static bool Equals(AnyObjectId firstObjectId, AnyObjectId secondObjectId)
{
if (firstObjectId == secondObjectId)
{
return true;
}
// We test word 2 first as odds are someone already used our
// word 1 as a hash code, and applying that came up with these
// two instances we are comparing for equality. Therefore the
// first two words are very likely to be identical. We want to
// break away from collisions as quickly as possible.
//
return firstObjectId.w2 == secondObjectId.w2 && firstObjectId.w3 == secondObjectId
.w3 && firstObjectId.w4 == secondObjectId.w4 && firstObjectId.w5 == secondObjectId
.w5 && firstObjectId.w1 == secondObjectId.w1;
}
/// <summary>Add a parent onto the end of the parent list.</summary>
/// <remarks>Add a parent onto the end of the parent list.</remarks>
/// <param name="additionalParent">new parent to add onto the end of the current parent list.
/// </param>
public virtual void AddParentId(AnyObjectId additionalParent)
{
if (parentIds.Length == 0)
{
SetParentId(additionalParent);
}
else
{
ObjectId[] newParents = new ObjectId[parentIds.Length + 1];
for (int i = 0; i < parentIds.Length; i++)
{
newParents[i] = parentIds[i];
}
newParents[parentIds.Length] = additionalParent.Copy();
parentIds = newParents;
}
}
/// <summary>
/// Create a generator and advance it to the submodule entry at the given
/// path
/// </summary>
/// <param name="repository"></param>
/// <param name="treeId"></param>
/// <param name="path"></param>
/// <returns>generator at given path, null if no submodule at given path</returns>
/// <exception cref="System.IO.IOException">System.IO.IOException</exception>
public static NGit.Submodule.SubmoduleWalk ForPath(Repository repository, AnyObjectId
treeId, string path)
{
NGit.Submodule.SubmoduleWalk generator = new NGit.Submodule.SubmoduleWalk(repository
);
generator.SetTree(treeId);
PathFilter filter = PathFilter.Create(path);
generator.SetFilter(filter);
while (generator.Next())
{
if (filter.IsDone(generator.walk))
{
return generator;
}
}
return null;
}
/// <summary>Lookup an existing mapping.</summary>
/// <remarks>Lookup an existing mapping.</remarks>
/// <param name="toFind">the object identifier to find.</param>
/// <returns>the instance mapped to toFind, or null if no mapping exists.</returns>
public virtual V Get(AnyObjectId toFind)
{
int msk = mask;
int i = toFind.w1 & msk;
V[] tbl = table;
V obj;
while ((obj = tbl[i]) != null)
{
if (AnyObjectId.Equals(obj, toFind))
{
return(obj);
}
i = (i + 1) & msk;
}
return(null);
}
/// <exception cref="NGit.Errors.MissingObjectException"></exception>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException"></exception>
/// <exception cref="System.IO.IOException"></exception>
private static byte[] Read(Repository db, AnyObjectId treeish, string path)
{
ObjectReader or = db.NewObjectReader();
try
{
TreeWalk tree = TreeWalk.ForPath(or, path, AsTree(or, treeish));
if (tree == null)
{
throw new FileNotFoundException(MessageFormat.Format(JGitText.Get().entryNotFoundByPath
, path));
}
return(Read(or, tree.GetObjectId(0)));
}
finally
{
or.Release();
}
}
/// <summary>Lookup an existing mapping.</summary>
/// <remarks>Lookup an existing mapping.</remarks>
/// <param name="toFind">the object identifier to find.</param>
/// <returns>the instance mapped to toFind, or null if no mapping exists.</returns>
public virtual V Get(AnyObjectId toFind)
{
int i = toFind.w1 & mask;
V[] tbl = table;
int end = tbl.Length;
V obj;
while ((obj = tbl[i]) != null)
{
if (AnyObjectId.Equals(obj, toFind))
{
return(obj);
}
if (++i == end)
{
i = 0;
}
}
return(null);
}
internal virtual void Add(AnyObjectId objectId)
{
UnpackedObjectCache.Table t = table;
if (t.Add(objectId))
{
}
else
{
// The object either already exists in the table, or was
// successfully added. Either way leave the table alone.
//
// The object won't fit into the table. Implement a crude
// cache removal by just dropping the table away, but double
// it in size for the next incarnation.
//
UnpackedObjectCache.Table n = new UnpackedObjectCache.Table(Math.Min(t.bits + 1,
MAX_BITS));
n.Add(objectId);
table = n;
}
}
/// <summary>Append any entry to the tree.</summary>
/// <remarks>Append any entry to the tree.</remarks>
/// <param name="nameBuf">
/// buffer holding the name of the entry. The name should be UTF-8
/// encoded, but file name encoding is not a well defined concept
/// in Git.
/// </param>
/// <param name="namePos">
/// first position within
/// <code>nameBuf</code>
/// of the name data.
/// </param>
/// <param name="nameLen">
/// number of bytes from
/// <code>nameBuf</code>
/// to use as the name.
/// </param>
/// <param name="mode">
/// mode describing the treatment of
/// <code>id</code>
/// .
/// </param>
/// <param name="id">the ObjectId to store in this entry.</param>
public virtual void Append(byte[] nameBuf, int namePos, int nameLen, FileMode mode
, AnyObjectId id)
{
if (FmtBuf(nameBuf, namePos, nameLen, mode))
{
id.CopyRawTo(buf, ptr);
ptr += Constants.OBJECT_ID_LENGTH;
}
else
{
try
{
FmtOverflowBuffer(nameBuf, namePos, nameLen, mode);
id.CopyRawTo(overflowBuffer);
}
catch (IOException badBuffer)
{
// This should never occur.
throw new RuntimeException(badBuffer);
}
}
}
/// <exception cref="System.IO.IOException"></exception>
/// <exception cref="NGit.Errors.CorruptObjectException"></exception>
private static void CheckValidEndOfStream(InputStream @in, Inflater inf, AnyObjectId
id, byte[] buf)
{
for (; ; )
{
int r;
try
{
r = inf.Inflate(buf);
}
catch (SharpZipBaseException)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectBadStream);
}
if (r != 0)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectIncorrectLength);
}
if (inf.IsFinished)
{
if (inf.RemainingInput != 0 || @in.Read() != -1)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectBadStream);
}
break;
}
if (!inf.IsNeedingInput)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectBadStream);
}
r = @in.Read(buf);
if (r <= 0)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectBadStream);
}
inf.SetInput(buf, 0, r);
}
}
/// <exception cref="System.IO.IOException"></exception>
internal static long GetSize(InputStream @in, AnyObjectId id, WindowCursor wc)
{
try
{
@in = Buffer(@in);
@in.Mark(20);
byte[] hdr = new byte[64];
IOUtil.ReadFully(@in, hdr, 0, 2);
if (IsStandardFormat(hdr))
{
@in.Reset();
Inflater inf = wc.Inflater();
InputStream zIn = Inflate(@in, inf);
int avail = ReadSome(zIn, hdr, 0, 64);
if (avail < 5)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectNoHeader);
}
MutableInteger p = new MutableInteger();
Constants.DecodeTypeString(id, hdr, unchecked((byte)' '), p);
long size = RawParseUtils.ParseLongBase10(hdr, p.value, p);
if (size < 0)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectNegativeSize);
}
return size;
}
else
{
ReadSome(@in, hdr, 2, 18);
int c = hdr[0] & unchecked((int)(0xff));
long size = c & 15;
int shift = 4;
int p = 1;
while ((c & unchecked((int)(0x80))) != 0)
{
c = hdr[p++] & unchecked((int)(0xff));
size += (c & unchecked((int)(0x7f))) << shift;
shift += 7;
}
return size;
}
}
catch (SharpZipBaseException)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectBadStream);
}
}
/// <summary>Load a configuration file from a blob stored in a specific commit.</summary>
/// <remarks>Load a configuration file from a blob stored in a specific commit.</remarks>
/// <param name="base">the base configuration file</param>
/// <param name="db">the repository containing the objects.</param>
/// <param name="treeish">the tree (or commit) that contains the object</param>
/// <param name="path">the path within the tree</param>
/// <exception cref="System.IO.FileNotFoundException">the path does not exist in the commit's tree.
/// </exception>
/// <exception cref="System.IO.IOException">the tree and/or blob cannot be accessed.</exception>
/// <exception cref="NGit.Errors.ConfigInvalidException">the blob is not a valid configuration format.
/// </exception>
public BlobBasedConfig(Config @base, Repository db, AnyObjectId treeish, string path
) : this(@base, Read(db, treeish, path))
{
}
public SubId(AnyObjectId id) : base(id)
{
}
/// <summary>Open an object from this database.</summary>
/// <remarks>
/// Open an object from this database.
/// <p>
/// This is a one-shot call interface which may be faster than allocating a
/// <see cref="NewReader()">NewReader()</see>
/// to perform the lookup.
/// </remarks>
/// <param name="objectId">identity of the object to open.</param>
/// <returns>
/// a
/// <see cref="ObjectLoader">ObjectLoader</see>
/// for accessing the object.
/// </returns>
/// <exception cref="NGit.Errors.MissingObjectException">the object does not exist.</exception>
/// <exception cref="System.IO.IOException">the object store cannot be accessed.</exception>
public virtual ObjectLoader Open(AnyObjectId objectId)
{
return(Open(objectId, ObjectReader.OBJ_ANY));
}
/// <summary>Returns true if this map contains the specified object.</summary>
/// <remarks>Returns true if this map contains the specified object.</remarks>
/// <param name="toFind">object to find.</param>
/// <returns>true if the mapping exists for this object; false otherwise.</returns>
public virtual bool Contains(AnyObjectId toFind)
{
return(Get(toFind) != null);
}
/// <exception cref="System.IO.IOException"></exception>
internal static ObjectLoader Open(InputStream @in, FilePath path, AnyObjectId id,
WindowCursor wc)
{
try
{
@in = Buffer(@in);
@in.Mark(20);
byte[] hdr = new byte[64];
IOUtil.ReadFully(@in, hdr, 0, 2);
if (IsStandardFormat(hdr))
{
@in.Reset();
Inflater inf = wc.Inflater();
InputStream zIn = Inflate(@in, inf);
int avail = ReadSome(zIn, hdr, 0, 64);
if (avail < 5)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectNoHeader);
}
MutableInteger p = new MutableInteger();
int type = Constants.DecodeTypeString(id, hdr, unchecked((byte)' '), p);
long size = RawParseUtils.ParseLongBase10(hdr, p.value, p);
if (size < 0)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectNegativeSize);
}
if (hdr[p.value++] != 0)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectGarbageAfterSize
);
}
if (path == null && int.MaxValue < size)
{
LargeObjectException.ExceedsByteArrayLimit e;
e = new LargeObjectException.ExceedsByteArrayLimit();
e.SetObjectId(id);
throw e;
}
if (size < wc.GetStreamFileThreshold() || path == null)
{
byte[] data = new byte[(int)size];
int n = avail - p.value;
if (n > 0)
{
System.Array.Copy(hdr, p.value, data, 0, n);
}
IOUtil.ReadFully(zIn, data, n, data.Length - n);
CheckValidEndOfStream(@in, inf, id, hdr);
return new ObjectLoader.SmallObject(type, data);
}
return new UnpackedObject.LargeObject(type, size, path, id, wc.db);
}
else
{
ReadSome(@in, hdr, 2, 18);
int c = hdr[0] & unchecked((int)(0xff));
int type = (c >> 4) & 7;
long size = c & 15;
int shift = 4;
int p = 1;
while ((c & unchecked((int)(0x80))) != 0)
{
c = hdr[p++] & unchecked((int)(0xff));
size += (c & unchecked((int)(0x7f))) << shift;
shift += 7;
}
switch (type)
{
case Constants.OBJ_COMMIT:
case Constants.OBJ_TREE:
case Constants.OBJ_BLOB:
case Constants.OBJ_TAG:
{
// Acceptable types for a loose object.
break;
}
default:
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectInvalidType);
}
}
if (path == null && int.MaxValue < size)
{
LargeObjectException.ExceedsByteArrayLimit e;
e = new LargeObjectException.ExceedsByteArrayLimit();
e.SetObjectId(id);
throw e;
}
if (size < wc.GetStreamFileThreshold() || path == null)
{
@in.Reset();
IOUtil.SkipFully(@in, p);
Inflater inf = wc.Inflater();
InputStream zIn = Inflate(@in, inf);
byte[] data = new byte[(int)size];
IOUtil.ReadFully(zIn, data, 0, data.Length);
CheckValidEndOfStream(@in, inf, id, hdr);
return new ObjectLoader.SmallObject(type, data);
}
return new UnpackedObject.LargeObject(type, size, path, id, wc.db);
}
}
catch (SharpZipBaseException)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectBadStream);
}
}
/// <summary>Reset this parser to walk through the given tree.</summary>
/// <remarks>Reset this parser to walk through the given tree.</remarks>
/// <param name="reader">reader to use during repository access.</param>
/// <param name="id">
/// identity of the tree being parsed; used only in exception
/// messages if data corruption is found.
/// </param>
/// <returns>the root level parser.</returns>
/// <exception cref="NGit.Errors.MissingObjectException">the object supplied is not available from the repository.
/// </exception>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException">
/// the object supplied as an argument is not actually a tree and
/// cannot be parsed as though it were a tree.
/// </exception>
/// <exception cref="System.IO.IOException">a loose object or pack file could not be read.
/// </exception>
public virtual NGit.Treewalk.CanonicalTreeParser ResetRoot(ObjectReader reader, AnyObjectId
id)
{
NGit.Treewalk.CanonicalTreeParser p = this;
while (p.parent != null)
{
p = (NGit.Treewalk.CanonicalTreeParser)p.parent;
}
p.Reset(reader, id);
return p;
}
/// <summary>Back door to quickly create a subtree iterator for any subtree.</summary>
/// <remarks>
/// Back door to quickly create a subtree iterator for any subtree.
/// <p/>
/// Don't use this unless you are ObjectWalk. The method is meant to be
/// called only once the current entry has been identified as a tree and its
/// identity has been converted into an ObjectId.
/// </remarks>
/// <param name="reader">reader to load the tree data from.</param>
/// <param name="id">ObjectId of the tree to open.</param>
/// <returns>a new parser that walks over the current subtree.</returns>
/// <exception cref="System.IO.IOException">a loose object or pack file could not be read.
/// </exception>
public NGit.Treewalk.CanonicalTreeParser CreateSubtreeIterator0(ObjectReader reader
, AnyObjectId id)
{
NGit.Treewalk.CanonicalTreeParser p = new NGit.Treewalk.CanonicalTreeParser(this);
p.Reset(reader, id);
return p;
}
/// <summary>Compares this abbreviation to a full object id.</summary>
/// <remarks>Compares this abbreviation to a full object id.</remarks>
/// <param name="other">the other object id.</param>
/// <returns>
/// <0 if this abbreviation names an object that is less than
/// <code>other</code>; 0 if this abbreviation exactly matches the
/// first
/// <see cref="Length()">Length()</see>
/// digits of <code>other.name()</code>;
/// >0 if this abbreviation names an object that is after
/// <code>other</code>.
/// </returns>
public int PrefixCompare(AnyObjectId other)
{
int cmp;
cmp = NB.CompareUInt32(w1, Mask(1, other.w1));
if (cmp != 0)
{
return cmp;
}
cmp = NB.CompareUInt32(w2, Mask(2, other.w2));
if (cmp != 0)
{
return cmp;
}
cmp = NB.CompareUInt32(w3, Mask(3, other.w3));
if (cmp != 0)
{
return cmp;
}
cmp = NB.CompareUInt32(w4, Mask(4, other.w4));
if (cmp != 0)
{
return cmp;
}
return NB.CompareUInt32(w5, Mask(5, other.w5));
}
/// <summary>Append any entry to the tree.</summary>
/// <remarks>Append any entry to the tree.</remarks>
/// <param name="name">
/// name of the entry. The name should be UTF-8 encoded, but file
/// name encoding is not a well defined concept in Git.
/// </param>
/// <param name="mode">
/// mode describing the treatment of
/// <code>id</code>
/// .
/// </param>
/// <param name="id">the ObjectId to store in this entry.</param>
public virtual void Append(byte[] name, FileMode mode, AnyObjectId id)
{
Append(name, 0, name.Length, mode, id);
}
/// <summary>Append any entry to the tree.</summary>
/// <remarks>Append any entry to the tree.</remarks>
/// <param name="name">name of the entry.</param>
/// <param name="mode">
/// mode describing the treatment of
/// <code>id</code>
/// .
/// </param>
/// <param name="id">the ObjectId to store in this entry.</param>
public virtual void Append(string name, FileMode mode, AnyObjectId id)
{
Append(Constants.Encode(name), mode, id);
}
internal LargeObject(int type, long size, FilePath path, AnyObjectId id, FileObjectDatabase
db)
{
this.type = type;
this.size = size;
this.path = path;
this.id = id.Copy();
this.source = db;
}
/// <summary>Parse an encoded type string into a type constant.</summary>
/// <remarks>Parse an encoded type string into a type constant.</remarks>
/// <param name="id">
/// object id this type string came from; may be null if that is
/// not known at the time the parse is occurring.
/// </param>
/// <param name="typeString">string version of the type code.</param>
/// <param name="endMark">
/// character immediately following the type string. Usually ' '
/// (space) or '\n' (line feed).
/// </param>
/// <param name="offset">
/// position within <code>typeString</code> where the parse
/// should start. Updated with the new position (just past
/// <code>endMark</code> when the parse is successful.
/// </param>
/// <returns>
/// a type code constant (one of
/// <see cref="OBJ_BLOB">OBJ_BLOB</see>
/// ,
/// <see cref="OBJ_COMMIT">OBJ_COMMIT</see>
/// ,
/// <see cref="OBJ_TAG">OBJ_TAG</see>
/// ,
/// <see cref="OBJ_TREE">OBJ_TREE</see>
/// .
/// </returns>
/// <exception cref="NGit.Errors.CorruptObjectException">there is no valid type identified by <code>typeString</code>.
/// </exception>
public static int DecodeTypeString(AnyObjectId id, byte[] typeString, byte endMark
, MutableInteger offset)
{
try
{
int position = offset.value;
switch (typeString[position])
{
case (byte)('b'):
{
if (typeString[position + 1] != 'l' || typeString[position + 2] != 'o' || typeString
[position + 3] != 'b' || typeString[position + 4] != endMark)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectInvalidType);
}
offset.value = position + 5;
return(NGit.Constants.OBJ_BLOB);
}
case (byte)('c'):
{
if (typeString[position + 1] != 'o' || typeString[position + 2] != 'm' || typeString
[position + 3] != 'm' || typeString[position + 4] != 'i' || typeString[position
+ 5] != 't' || typeString[position + 6] != endMark)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectInvalidType);
}
offset.value = position + 7;
return(NGit.Constants.OBJ_COMMIT);
}
case (byte)('t'):
{
switch (typeString[position + 1])
{
case (byte)('a'):
{
if (typeString[position + 2] != 'g' || typeString[position + 3] != endMark)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectInvalidType);
}
offset.value = position + 4;
return(NGit.Constants.OBJ_TAG);
}
case (byte)('r'):
{
if (typeString[position + 2] != 'e' || typeString[position + 3] != 'e' || typeString
[position + 4] != endMark)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectInvalidType);
}
offset.value = position + 5;
return(NGit.Constants.OBJ_TREE);
}
default:
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectInvalidType);
}
}
goto default;
}
default:
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectInvalidType);
}
}
}
catch (IndexOutOfRangeException)
{
throw new CorruptObjectException(id, JGitText.Get().corruptObjectInvalidType);
}
}
/// <summary>Initialize this entry with a specific ObjectId.</summary>
/// <remarks>Initialize this entry with a specific ObjectId.</remarks>
/// <param name="id">the id the entry represents.</param>
protected internal Entry(AnyObjectId id) : base(id)
{
}
/// <summary>Create a new structure to remember information about an object.</summary>
/// <remarks>Create a new structure to remember information about an object.</remarks>
/// <param name="id">the identity of the object the new instance tracks.</param>
protected internal PackedObjectInfo(AnyObjectId id) : base(id)
{
}
/// <summary>Set the identity of the object, if its not already set.</summary>
/// <remarks>Set the identity of the object, if its not already set.</remarks>
/// <param name="id">the id of the object that is too large to process.</param>
public virtual void SetObjectId(AnyObjectId id)
{
if (objectId == null)
{
objectId = id.Copy();
}
}
private static bool Equals(AnyObjectId firstObjectId, AnyObjectId secondObjectId)
{
return(firstObjectId.w2 == secondObjectId.w2 && firstObjectId.w3 == secondObjectId
.w3 && firstObjectId.w4 == secondObjectId.w4 && firstObjectId.w5 == secondObjectId
.w5 && firstObjectId.w1 == secondObjectId.w1);
}
/// <exception cref="NGit.Errors.MissingObjectException"></exception>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException"></exception>
/// <exception cref="System.IO.IOException"></exception>
private static byte[] Read(ObjectReader or, AnyObjectId blobId)
{
ObjectLoader loader = or.Open(blobId, Constants.OBJ_BLOB);
return(loader.GetCachedBytes(int.MaxValue));
}
internal PackedObjectInfo(long headerOffset, int packedCRC, AnyObjectId id) : base
(id)
{
offset = headerOffset;
crc = packedCRC;
}
/// <summary>Event notifying start of a delta referencing its base by ObjectId.</summary> /// <remarks>Event notifying start of a delta referencing its base by ObjectId.</remarks> /// <param name="deltaStreamPosition">position of this object in the incoming stream. /// </param> /// <param name="baseId"> /// name of the base object. This object may be later in the /// stream, or might not appear at all in the stream (in the case /// of a thin-pack). /// </param> /// <param name="inflatedSize"> /// size of the delta when fully inflated. The size stored within /// the pack may be larger or smaller, and is not yet known. /// </param> /// <exception cref="System.IO.IOException">the object cannot be recorded.</exception> protected internal abstract void OnBeginRefDelta(long deltaStreamPosition, AnyObjectId baseId, long inflatedSize);
/// <summary>Create a large object exception, naming the object that is too big.</summary>
/// <remarks>Create a large object exception, naming the object that is too big.</remarks>
/// <param name="id">
/// identity of the object that is too big to be loaded as a byte
/// array in this JVM.
/// </param>
public LargeObjectException(AnyObjectId id)
{
// Do nothing.
SetObjectId(id);
}
protected internal DeltaChain(AnyObjectId id) : base(id)
{
}
/// <summary>Recursively add an entire tree into this builder.</summary>
/// <remarks>
/// Recursively add an entire tree into this builder.
/// <p>
/// If pathPrefix is "a/b" and the tree contains file "c" then the resulting
/// DirCacheEntry will have the path "a/b/c".
/// <p>
/// All entries are inserted at stage 0, therefore assuming that the
/// application will not insert any other paths with the same pathPrefix.
/// </remarks>
/// <param name="pathPrefix">
/// UTF-8 encoded prefix to mount the tree's entries at. If the
/// path does not end with '/' one will be automatically inserted
/// as necessary.
/// </param>
/// <param name="stage">stage of the entries when adding them.</param>
/// <param name="reader">
/// reader the tree(s) will be read from during recursive
/// traversal. This must be the same repository that the resulting
/// DirCache would be written out to (or used in) otherwise the
/// caller is simply asking for deferred MissingObjectExceptions.
/// Caller is responsible for releasing this reader when done.
/// </param>
/// <param name="tree">
/// the tree to recursively add. This tree's contents will appear
/// under <code>pathPrefix</code>. The ObjectId must be that of a
/// tree; the caller is responsible for dereferencing a tag or
/// commit (if necessary).
/// </param>
/// <exception cref="System.IO.IOException">a tree cannot be read to iterate through its entries.
/// </exception>
public virtual void AddTree(byte[] pathPrefix, int stage, ObjectReader reader, AnyObjectId
tree)
{
TreeWalk tw = new TreeWalk(reader);
tw.AddTree(new CanonicalTreeParser(pathPrefix, reader, tree.ToObjectId()));
tw.Recursive = true;
if (tw.Next())
{
DirCacheEntry newEntry = ToEntry(stage, tw);
BeforeAdd(newEntry);
FastAdd(newEntry);
while (tw.Next())
{
FastAdd(ToEntry(stage, tw));
}
}
}
private PackParser.UnresolvedDelta RemoveBaseById(AnyObjectId id)
{
PackParser.DeltaChain d = baseById.Get(id);
return d != null ? d.Remove() : null;
}
/// <summary>
/// Convert an AbbreviatedObjectId from an
/// <see cref="AnyObjectId">AnyObjectId</see>
/// .
/// <p>
/// This method copies over all bits of the Id, and is therefore complete
/// (see
/// <see cref="IsComplete()">IsComplete()</see>
/// ).
/// </summary>
/// <param name="id">
/// the
/// <see cref="ObjectId">ObjectId</see>
/// to convert from.
/// </param>
/// <returns>the converted object id.</returns>
public static NGit.AbbreviatedObjectId FromObjectId(AnyObjectId id)
{
return new NGit.AbbreviatedObjectId(Constants.OBJECT_ID_STRING_LENGTH, id.w1, id.
w2, id.w3, id.w4, id.w5);
}
/// <summary>Load a configuration file from a blob.</summary>
/// <remarks>Load a configuration file from a blob.</remarks>
/// <param name="base">the base configuration file</param>
/// <param name="db">the repository</param>
/// <param name="objectId">the object identifier</param>
/// <exception cref="System.IO.IOException">the blob cannot be read from the repository.
/// </exception>
/// <exception cref="NGit.Errors.ConfigInvalidException">the blob is not a valid configuration format.
/// </exception>
public BlobBasedConfig(Config @base, Repository db, AnyObjectId objectId) : this(
@base, Read(db, objectId))
{
}
/// <summary>Create a new parser for a tree appearing in a subset of a repository.</summary>
/// <remarks>Create a new parser for a tree appearing in a subset of a repository.</remarks>
/// <param name="prefix">
/// position of this iterator in the repository tree. The value
/// may be null or the empty array to indicate the prefix is the
/// root of the repository. A trailing slash ('/') is
/// automatically appended if the prefix does not end in '/'.
/// </param>
/// <param name="reader">reader to load the tree data from.</param>
/// <param name="treeId">
/// identity of the tree being parsed; used only in exception
/// messages if data corruption is found.
/// </param>
/// <exception cref="NGit.Errors.MissingObjectException">the object supplied is not available from the repository.
/// </exception>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException">
/// the object supplied as an argument is not actually a tree and
/// cannot be parsed as though it were a tree.
/// </exception>
/// <exception cref="System.IO.IOException">a loose object or pack file could not be read.
/// </exception>
public CanonicalTreeParser(byte[] prefix, ObjectReader reader, AnyObjectId treeId
)
: base(prefix)
{
Reset(reader, treeId);
}
internal SubclassedId(AnyObjectId src) : base(src)
{
}
/// <summary>Reset this parser to walk through the given tree.</summary>
/// <remarks>Reset this parser to walk through the given tree.</remarks>
/// <param name="reader">reader to use during repository access.</param>
/// <param name="id">
/// identity of the tree being parsed; used only in exception
/// messages if data corruption is found.
/// </param>
/// <exception cref="NGit.Errors.MissingObjectException">the object supplied is not available from the repository.
/// </exception>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException">
/// the object supplied as an argument is not actually a tree and
/// cannot be parsed as though it were a tree.
/// </exception>
/// <exception cref="System.IO.IOException">a loose object or pack file could not be read.
/// </exception>
public virtual void Reset(ObjectReader reader, AnyObjectId id)
{
Reset(reader.Open(id, Constants.OBJ_TREE).GetCachedBytes());
}
/// <exception cref="System.IO.IOException"></exception>
private void VerifySafeObject(AnyObjectId id, int type, byte[] data)
{
if (objCheck != null)
{
try
{
objCheck.Check(type, data);
}
catch (CorruptObjectException e)
{
throw new IOException(MessageFormat.Format(JGitText.Get().invalidObject, Constants
.TypeString(type), id.Name, e.Message));
}
}
try
{
ObjectLoader ldr = readCurs.Open(id, type);
byte[] existingData = ldr.GetCachedBytes(data.Length);
if (!Arrays.Equals(data, existingData))
{
throw new IOException(MessageFormat.Format(JGitText.Get().collisionOn, id.Name));
}
}
catch (MissingObjectException)
{
}
}
/// <summary>Include an object (and everything reachable from it) in the bundle.</summary>
/// <remarks>Include an object (and everything reachable from it) in the bundle.</remarks>
/// <param name="name">
/// name the recipient can discover this object as from the
/// bundle's list of advertised refs . The name must be a valid
/// ref format and must not have already been included in this
/// bundle writer.
/// </param>
/// <param name="id">object to pack. Multiple refs may point to the same object.</param>
public virtual void Include(string name, AnyObjectId id)
{
if (!Repository.IsValidRefName(name))
{
throw new ArgumentException(MessageFormat.Format(JGitText.Get().invalidRefName, name
));
}
if (include.ContainsKey(name))
{
throw new InvalidOperationException(JGitText.Get().duplicateRef + name);
}
include.Put(name, id.ToObjectId());
}
/// <summary>Construct a PackedObjectInfo instance for this parser.</summary>
/// <remarks>Construct a PackedObjectInfo instance for this parser.</remarks>
/// <param name="id">identity of the object to be tracked.</param>
/// <param name="delta">
/// if the object was previously an unresolved delta, this is the
/// delta object that was tracking it. Otherwise null.
/// </param>
/// <param name="deltaBase">
/// if the object was previously an unresolved delta, this is the
/// ObjectId of the base of the delta. The base may be outside of
/// the pack stream if the stream was a thin-pack.
/// </param>
/// <returns>info object containing this object's data.</returns>
protected internal virtual PackedObjectInfo NewInfo(AnyObjectId id, PackParser.UnresolvedDelta
delta, ObjectId deltaBase)
{
PackedObjectInfo oe = new PackedObjectInfo(id);
if (delta != null)
{
oe.SetCRC(delta.crc);
}
return oe;
}
