/// <exception cref="NGit.Errors.MissingObjectException"></exception>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException"></exception>
/// <exception cref="System.IO.IOException"></exception>
private RevObject EnterTree(RevObject obj)
{
ObjectWalk.TreeVisit tv = NewTreeVisit(obj);
tv.parent = currVisit;
currVisit = tv;
return(obj);
}
public override void Dispose()
{
base.Dispose();
pendingObjects = new BlockObjQueue();
firstCommit = null;
lastCommit = null;
currVisit = null;
freeVisit = null;
}
/// <summary>Get the current object's path hash code.</summary>
/// <remarks>
/// Get the current object's path hash code.
/// <p>
/// This method computes a hash code on the fly for this path, the hash is
/// suitable to cluster objects that may have similar paths together.
/// </remarks>
/// <returns>path hash code; any integer may be returned.</returns>
public virtual int GetPathHashCode()
{
ObjectWalk.TreeVisit tv = currVisit;
if (tv == null)
{
return(0);
}
int nameEnd = tv.nameEnd;
if (nameEnd == 0)
{
// When nameEnd == 0 the subtree is itself the current path
// being visited. The name hash must be obtained from its
// parent tree. If there is no parent, this is a root tree with
// a hash code of 0.
tv = tv.parent;
if (tv == null)
{
return(0);
}
nameEnd = tv.nameEnd;
}
byte[] buf;
int ptr;
if (16 <= (nameEnd - tv.namePtr))
{
buf = tv.buf;
ptr = nameEnd - 16;
}
else
{
nameEnd = pathLen;
if (nameEnd == 0)
{
nameEnd = UpdatePathBuf(currVisit);
pathLen = nameEnd;
}
buf = pathBuf;
ptr = Math.Max(0, nameEnd - 16);
}
int hash = 0;
for (; ptr < nameEnd; ptr++)
{
byte c = buf[ptr];
if (c != ' ')
{
hash = ((int)(((uint)hash) >> 2)) + (c << 24);
}
}
return(hash);
}
protected internal override void Reset(int retainFlags)
{
base.Reset(retainFlags);
foreach (RevObject obj in rootObjects)
{
obj.flags &= ~IN_PENDING;
}
rootObjects = new AList <RevObject>();
pendingObjects = new BlockObjQueue();
firstCommit = null;
lastCommit = null;
currVisit = null;
freeVisit = null;
}
/// <exception cref="NGit.Errors.LargeObjectException"></exception>
/// <exception cref="NGit.Errors.MissingObjectException"></exception>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException"></exception>
/// <exception cref="System.IO.IOException"></exception>
private ObjectWalk.TreeVisit NewTreeVisit(RevObject obj)
{
ObjectWalk.TreeVisit tv = freeVisit;
if (tv != null)
{
freeVisit = tv.parent;
tv.ptr = 0;
tv.namePtr = 0;
tv.nameEnd = 0;
tv.pathLen = 0;
}
else
{
tv = new ObjectWalk.TreeVisit();
}
tv.obj = obj;
tv.buf = reader.Open(obj, Constants.OBJ_TREE).GetCachedBytes();
return(tv);
}
private int UpdatePathBuf(ObjectWalk.TreeVisit tv)
{
if (tv == null)
{
return(0);
}
// If nameEnd == 0 this tree has not yet contributed an entry.
// Update only for the parent, which if null will be empty.
int nameEnd = tv.nameEnd;
if (nameEnd == 0)
{
return(UpdatePathBuf(tv.parent));
}
int ptr = tv.pathLen;
if (ptr == 0)
{
ptr = UpdatePathBuf(tv.parent);
if (ptr == pathBuf.Length)
{
GrowPathBuf(ptr);
}
if (ptr != 0)
{
pathBuf[ptr++] = (byte)('/');
}
tv.pathLen = ptr;
}
int namePtr = tv.namePtr;
int nameLen = nameEnd - namePtr;
int end = ptr + nameLen;
while (pathBuf.Length < end)
{
GrowPathBuf(ptr);
}
System.Array.Copy(tv.buf, namePtr, pathBuf, ptr, nameLen);
return(end);
}
private void ReleaseTreeVisit(ObjectWalk.TreeVisit tv)
{
tv.buf = null;
tv.parent = freeVisit;
freeVisit = tv;
}
/// <exception cref="NGit.Errors.LargeObjectException"></exception>
/// <exception cref="NGit.Errors.MissingObjectException"></exception>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException"></exception>
/// <exception cref="System.IO.IOException"></exception>
private ObjectWalk.TreeVisit NewTreeVisit(RevObject obj)
{
ObjectWalk.TreeVisit tv = freeVisit;
if (tv != null)
{
freeVisit = tv.parent;
tv.ptr = 0;
tv.namePtr = 0;
tv.nameEnd = 0;
tv.pathLen = 0;
}
else
{
tv = new ObjectWalk.TreeVisit();
}
tv.obj = obj;
tv.buf = reader.Open(obj, Constants.OBJ_TREE).GetCachedBytes();
return tv;
}
protected internal override void Reset(int retainFlags)
{
base.Reset(retainFlags);
foreach (RevObject obj in rootObjects)
{
obj.flags &= ~IN_PENDING;
}
rootObjects = new AList<RevObject>();
pendingObjects = new BlockObjQueue();
firstCommit = null;
lastCommit = null;
currVisit = null;
freeVisit = null;
}
public override void Dispose()
{
base.Dispose();
pendingObjects = new BlockObjQueue();
firstCommit = null;
lastCommit = null;
currVisit = null;
freeVisit = null;
}
/// <exception cref="NGit.Errors.MissingObjectException"></exception>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException"></exception>
/// <exception cref="System.IO.IOException"></exception>
private RevObject EnterTree(RevObject obj)
{
ObjectWalk.TreeVisit tv = NewTreeVisit(obj);
tv.parent = currVisit;
currVisit = tv;
return obj;
}
/// <summary>Pop the next most recent object.</summary>
/// <remarks>Pop the next most recent object.</remarks>
/// <returns>next most recent object; null if traversal is over.</returns>
/// <exception cref="NGit.Errors.MissingObjectException">
/// one or or more of the next objects are not available from the
/// object database, but were thought to be candidates for
/// traversal. This usually indicates a broken link.
/// </exception>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException">
/// one or or more of the objects in a tree do not match the type
/// indicated.
/// </exception>
/// <exception cref="System.IO.IOException">a pack file or loose object could not be read.
/// </exception>
public virtual RevObject NextObject()
{
pathLen = 0;
ObjectWalk.TreeVisit tv = currVisit;
while (tv != null)
{
byte[] buf = tv.buf;
for (int ptr = tv.ptr; ptr < buf.Length; )
{
int startPtr = ptr;
ptr = FindObjectId(buf, ptr);
idBuffer.FromRaw(buf, ptr);
ptr += ID_SZ;
RevObject obj = objects.Get(idBuffer);
if (obj != null && (obj.flags & SEEN) != 0)
{
continue;
}
int mode = ParseMode(buf, startPtr, ptr, tv);
int flags;
switch ((int)(((uint)mode) >> TYPE_SHIFT))
{
case TYPE_FILE:
case TYPE_SYMLINK:
{
if (obj == null)
{
obj = new RevBlob(idBuffer);
obj.flags = SEEN;
objects.Add(obj);
return obj;
}
if (!(obj is RevBlob))
{
throw new IncorrectObjectTypeException(obj, Constants.OBJ_BLOB);
}
obj.flags = flags = obj.flags | SEEN;
if ((flags & UNINTERESTING) == 0)
{
return obj;
}
if (boundary)
{
return obj;
}
continue;
goto case TYPE_TREE;
}
case TYPE_TREE:
{
if (obj == null)
{
obj = new RevTree(idBuffer);
obj.flags = SEEN;
objects.Add(obj);
return EnterTree(obj);
}
if (!(obj is RevTree))
{
throw new IncorrectObjectTypeException(obj, Constants.OBJ_TREE);
}
obj.flags = flags = obj.flags | SEEN;
if ((flags & UNINTERESTING) == 0)
{
return EnterTree(obj);
}
if (boundary)
{
return EnterTree(obj);
}
continue;
goto case TYPE_GITLINK;
}
case TYPE_GITLINK:
{
continue;
goto default;
}
default:
{
throw new CorruptObjectException(MessageFormat.Format(JGitText.Get().corruptObjectInvalidMode3
, string.Format("%o", Sharpen.Extensions.ValueOf(mode)), idBuffer.Name, RawParseUtils
.Decode(buf, tv.namePtr, tv.nameEnd), tv.obj));
}
}
}
currVisit = tv.parent;
ReleaseTreeVisit(tv);
tv = currVisit;
}
for (; ; )
{
RevObject o = pendingObjects.Next();
if (o == null)
{
reader.WalkAdviceEnd();
return null;
}
int flags = o.flags;
if ((flags & SEEN) != 0)
{
continue;
}
flags |= SEEN;
o.flags = flags;
if ((flags & UNINTERESTING) == 0 | boundary)
{
if (o is RevTree)
{
tv = NewTreeVisit(o);
tv.parent = null;
currVisit = tv;
}
return o;
}
}
}
private void ReleaseTreeVisit(ObjectWalk.TreeVisit tv)
{
tv.buf = null;
tv.parent = freeVisit;
freeVisit = tv;
}
private static int ParseMode(byte[] buf, int startPtr, int recEndPtr, ObjectWalk.TreeVisit
tv)
{
int mode = buf[startPtr] - '0';
for (; ;)
{
byte c = buf[++startPtr];
if (' ' == c)
{
break;
}
mode <<= 3;
mode += c - '0';
c = buf[++startPtr];
if (' ' == c)
{
break;
}
mode <<= 3;
mode += c - '0';
c = buf[++startPtr];
if (' ' == c)
{
break;
}
mode <<= 3;
mode += c - '0';
c = buf[++startPtr];
if (' ' == c)
{
break;
}
mode <<= 3;
mode += c - '0';
c = buf[++startPtr];
if (' ' == c)
{
break;
}
mode <<= 3;
mode += c - '0';
c = buf[++startPtr];
if (' ' == c)
{
break;
}
mode <<= 3;
mode += c - '0';
c = buf[++startPtr];
if (' ' == c)
{
break;
}
mode <<= 3;
mode += c - '0';
}
tv.ptr = recEndPtr;
tv.namePtr = startPtr + 1;
tv.nameEnd = recEndPtr - (ID_SZ + 1);
return(mode);
}
/// <summary>Pop the next most recent object.</summary>
/// <remarks>Pop the next most recent object.</remarks>
/// <returns>next most recent object; null if traversal is over.</returns>
/// <exception cref="NGit.Errors.MissingObjectException">
/// one or or more of the next objects are not available from the
/// object database, but were thought to be candidates for
/// traversal. This usually indicates a broken link.
/// </exception>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException">
/// one or or more of the objects in a tree do not match the type
/// indicated.
/// </exception>
/// <exception cref="System.IO.IOException">a pack file or loose object could not be read.
/// </exception>
public virtual RevObject NextObject()
{
pathLen = 0;
ObjectWalk.TreeVisit tv = currVisit;
while (tv != null)
{
byte[] buf = tv.buf;
for (int ptr = tv.ptr; ptr < buf.Length;)
{
int startPtr = ptr;
ptr = FindObjectId(buf, ptr);
idBuffer.FromRaw(buf, ptr);
ptr += ID_SZ;
RevObject obj = objects.Get(idBuffer);
if (obj != null && (obj.flags & SEEN) != 0)
{
continue;
}
int mode = ParseMode(buf, startPtr, ptr, tv);
int flags;
switch ((int)(((uint)mode) >> TYPE_SHIFT))
{
case TYPE_FILE:
case TYPE_SYMLINK:
{
if (obj == null)
{
obj = new RevBlob(idBuffer);
obj.flags = SEEN;
objects.Add(obj);
return(obj);
}
if (!(obj is RevBlob))
{
throw new IncorrectObjectTypeException(obj, Constants.OBJ_BLOB);
}
obj.flags = flags = obj.flags | SEEN;
if ((flags & UNINTERESTING) == 0)
{
return(obj);
}
if (boundary)
{
return(obj);
}
continue;
goto case TYPE_TREE;
}
case TYPE_TREE:
{
if (obj == null)
{
obj = new RevTree(idBuffer);
obj.flags = SEEN;
objects.Add(obj);
return(EnterTree(obj));
}
if (!(obj is RevTree))
{
throw new IncorrectObjectTypeException(obj, Constants.OBJ_TREE);
}
obj.flags = flags = obj.flags | SEEN;
if ((flags & UNINTERESTING) == 0)
{
return(EnterTree(obj));
}
if (boundary)
{
return(EnterTree(obj));
}
continue;
goto case TYPE_GITLINK;
}
case TYPE_GITLINK:
{
continue;
goto default;
}
default:
{
throw new CorruptObjectException(MessageFormat.Format(JGitText.Get().corruptObjectInvalidMode3
, string.Format("%o", Sharpen.Extensions.ValueOf(mode)), idBuffer.Name, RawParseUtils
.Decode(buf, tv.namePtr, tv.nameEnd), tv.obj));
}
}
}
currVisit = tv.parent;
ReleaseTreeVisit(tv);
tv = currVisit;
}
for (; ;)
{
RevObject o = pendingObjects.Next();
if (o == null)
{
reader.WalkAdviceEnd();
return(null);
}
int flags = o.flags;
if ((flags & SEEN) != 0)
{
continue;
}
flags |= SEEN;
o.flags = flags;
if ((flags & UNINTERESTING) == 0 | boundary)
{
if (o is RevTree)
{
tv = NewTreeVisit(o);
tv.parent = null;
currVisit = tv;
}
return(o);
}
}
}
