private void EncodeTS(int pIdx, long when)
{
int @base = infoOffset + pIdx;
NB.EncodeInt32(info, @base, (int)(when / 1000));
NB.EncodeInt32(info, @base + 4, ((int)(when % 1000)) * 1000000);
}
/// <exception cref="System.IO.IOException"></exception>
internal void WriteFileHeader(int version, long objectCount)
{
System.Array.Copy(Constants.PACK_SIGNATURE, 0, headerBuffer, 0, 4);
NB.EncodeInt32(headerBuffer, 4, version);
NB.EncodeInt32(headerBuffer, 8, (int)objectCount);
Write(headerBuffer, 0, 12);
}
/// <exception cref="System.IO.IOException"></exception>
private void PackHeader(TemporaryBuffer.Heap tinyPack, int cnt)
{
byte[] hdr = new byte[8];
NB.EncodeInt32(hdr, 0, 2);
NB.EncodeInt32(hdr, 4, cnt);
tinyPack.Write(Constants.PACK_SIGNATURE);
tinyPack.Write(hdr, 0, 8);
}
/// <exception cref="System.IO.IOException"></exception>
private void WriteCRCs()
{
foreach (PackedObjectInfo oe in entries)
{
NB.EncodeInt32(tmp, 0, oe.GetCRC());
@out.Write(tmp, 0, 4);
}
}
/// <summary>Copy this ObjectId to a byte array.</summary>
/// <remarks>Copy this ObjectId to a byte array.</remarks>
/// <param name="b">the buffer to copy to.</param>
/// <param name="o">the offset within b to write at.</param>
public virtual void CopyRawTo(byte[] b, int o)
{
NB.EncodeInt32(b, o, w1);
NB.EncodeInt32(b, o + 4, w2);
NB.EncodeInt32(b, o + 8, w3);
NB.EncodeInt32(b, o + 12, w4);
NB.EncodeInt32(b, o + 16, w5);
}
/// <exception cref="System.IO.IOException"></exception>
internal virtual void WriteTo(OutputStream os)
{
MessageDigest foot = Constants.NewMessageDigest();
DigestOutputStream dos = new DigestOutputStream(os, foot);
bool extended = false;
for (int i = 0; i < entryCnt; i++)
{
extended |= sortedEntries[i].IsExtended;
}
// Write the header.
//
byte[] tmp = new byte[128];
System.Array.Copy(SIG_DIRC, 0, tmp, 0, SIG_DIRC.Length);
NB.EncodeInt32(tmp, 4, extended ? 3 : 2);
NB.EncodeInt32(tmp, 8, entryCnt);
dos.Write(tmp, 0, 12);
// Write the individual file entries.
//
if (snapshot == null)
{
// Write a new index, as no entries require smudging.
//
for (int i_1 = 0; i_1 < entryCnt; i_1++)
{
sortedEntries[i_1].Write(dos);
}
}
else
{
int smudge_s = (int)(snapshot.LastModified() / 1000);
int smudge_ns = ((int)(snapshot.LastModified() % 1000)) * 1000000;
for (int i_1 = 0; i_1 < entryCnt; i_1++)
{
DirCacheEntry e = sortedEntries[i_1];
if (e.MightBeRacilyClean(smudge_s, smudge_ns))
{
e.SmudgeRacilyClean();
}
e.Write(dos);
}
}
if (tree != null)
{
TemporaryBuffer bb = new TemporaryBuffer.LocalFile();
tree.Write(tmp, bb);
bb.Close();
NB.EncodeInt32(tmp, 0, EXT_TREE);
NB.EncodeInt32(tmp, 4, (int)bb.Length());
dos.Write(tmp, 0, 8);
bb.WriteTo(dos, null);
}
os.Write(foot.Digest());
os.Close();
}
/// <exception cref="System.IO.IOException"></exception>
protected internal override void WriteImpl()
{
WriteFanOutTable();
foreach (PackedObjectInfo oe in entries)
{
if (!CanStore(oe))
{
throw new IOException(JGitText.Get().packTooLargeForIndexVersion1);
}
NB.EncodeInt32(tmp, 0, (int)oe.GetOffset());
oe.CopyRawTo(tmp, 4);
@out.Write(tmp);
}
WriteChecksumFooter();
}
/// <exception cref="System.IO.IOException"></exception>
protected internal override void OnEndThinPack()
{
byte[] tailHash = this.tailDigest.Digest();
byte[] buf = Buffer();
MessageDigest origDigest = Constants.NewMessageDigest();
MessageDigest tailDigest = Constants.NewMessageDigest();
MessageDigest packDigest = Constants.NewMessageDigest();
long origRemaining = origEnd;
@out.Seek(0);
@out.ReadFully(buf, 0, 12);
origDigest.Update(buf, 0, 12);
origRemaining -= 12;
NB.EncodeInt32(buf, 8, GetObjectCount());
@out.Seek(0);
@out.Write(buf, 0, 12);
packDigest.Update(buf, 0, 12);
for (; ;)
{
int n = @out.Read(buf);
if (n < 0)
{
break;
}
if (origRemaining != 0)
{
int origCnt = (int)Math.Min(n, origRemaining);
origDigest.Update(buf, 0, origCnt);
origRemaining -= origCnt;
if (origRemaining == 0)
{
tailDigest.Update(buf, origCnt, n - origCnt);
}
}
else
{
tailDigest.Update(buf, 0, n);
}
packDigest.Update(buf, 0, n);
}
if (!Arrays.Equals(origDigest.Digest(), origHash) || !Arrays.Equals(tailDigest.Digest
(), tailHash))
{
throw new IOException(JGitText.Get().packCorruptedWhileWritingToFilesystem);
}
packHash = packDigest.Digest();
}
/// <summary>Output the standard 256 entry first-level fan-out table.</summary>
/// <remarks>
/// Output the standard 256 entry first-level fan-out table.
/// <p>
/// The fan-out table is 4 KB in size, holding 256 32-bit unsigned integer
/// counts. Each count represents the number of objects within this index
/// whose
/// <see cref="NGit.AnyObjectId.FirstByte()">NGit.AnyObjectId.FirstByte()</see>
/// matches the count's position in the
/// fan-out table.
/// </remarks>
/// <exception cref="System.IO.IOException">an error occurred while writing to the output stream.
/// </exception>
protected internal virtual void WriteFanOutTable()
{
int[] fanout = new int[256];
foreach (PackedObjectInfo po in entries)
{
fanout[po.FirstByte & unchecked ((int)(0xff))]++;
}
for (int i = 1; i < 256; i++)
{
fanout[i] += fanout[i - 1];
}
foreach (int n in fanout)
{
NB.EncodeInt32(tmp, 0, n);
@out.Write(tmp, 0, 4);
}
}
/// <exception cref="System.IO.IOException"></exception>
private void WriteOffset32()
{
int o64 = 0;
foreach (PackedObjectInfo oe in entries)
{
long o = oe.GetOffset();
if (o <= MAX_OFFSET_32)
{
NB.EncodeInt32(tmp, 0, (int)o);
}
else
{
NB.EncodeInt32(tmp, 0, IS_OFFSET_64 | o64++);
}
@out.Write(tmp, 0, 4);
}
}
/// <exception cref="System.IO.IOException"></exception>
private void WriteOffset32()
{
int o64 = 0;
foreach (PackedObjectInfo oe in entries)
{
long o = oe.GetOffset();
if (o < int.MaxValue)
{
NB.EncodeInt32(tmp, 0, (int)o);
}
else
{
NB.EncodeInt32(tmp, 0, (1 << 31) | o64++);
}
@out.Write(tmp, 0, 4);
}
}
/// <summary>Output the version 2 (and later) TOC header, with version number.</summary>
/// <remarks>
/// Output the version 2 (and later) TOC header, with version number.
/// <p>
/// Post version 1 all index files start with a TOC header that makes the
/// file an invalid version 1 file, and then includes the version number.
/// This header is necessary to recognize a version 1 from a version 2
/// formatted index.
/// </remarks>
/// <param name="version">version number of this index format being written.</param>
/// <exception cref="System.IO.IOException">an error occurred while writing to the output stream.
/// </exception>
protected internal virtual void WriteTOC(int version)
{
@out.Write(TOC);
NB.EncodeInt32(tmp, 0, version);
@out.Write(tmp, 0, 4);
}
/// <summary>Set the cached size (in bytes) of this file.</summary>
/// <remarks>Set the cached size (in bytes) of this file.</remarks>
/// <param name="sz">
/// new cached size of the file, as bytes. If the file is larger
/// than 2G, cast it to (int) before calling this method.
/// </param>
public virtual void SetLength(int sz)
{
NB.EncodeInt32(info, infoOffset + P_SIZE, sz);
}
/// <exception cref="System.IO.IOException"></exception>
internal virtual void WriteTo(OutputStream os)
{
MessageDigest foot = Constants.NewMessageDigest();
DigestOutputStream dos = new DigestOutputStream(os, foot);
bool extended = false;
for (int i = 0; i < entryCnt; i++)
{
extended |= sortedEntries[i].IsExtended;
}
// Write the header.
//
byte[] tmp = new byte[128];
System.Array.Copy(SIG_DIRC, 0, tmp, 0, SIG_DIRC.Length);
NB.EncodeInt32(tmp, 4, extended ? 3 : 2);
NB.EncodeInt32(tmp, 8, entryCnt);
dos.Write(tmp, 0, 12);
// Write the individual file entries.
int smudge_s;
int smudge_ns;
if (myLock != null)
{
// For new files we need to smudge the index entry
// if they have been modified "now". Ideally we'd
// want the timestamp when we're done writing the index,
// so we use the current timestamp as a approximation.
myLock.CreateCommitSnapshot();
snapshot = myLock.GetCommitSnapshot();
smudge_s = (int)(snapshot.LastModified() / 1000);
smudge_ns = ((int)(snapshot.LastModified() % 1000)) * 1000000;
}
else
{
// Used in unit tests only
smudge_ns = 0;
smudge_s = 0;
}
// Check if tree is non-null here since calling updateSmudgedEntries
// will automatically build it via creating a DirCacheIterator
bool writeTree = tree != null;
if (repository != null && entryCnt > 0)
{
UpdateSmudgedEntries();
}
for (int i_1 = 0; i_1 < entryCnt; i_1++)
{
DirCacheEntry e = sortedEntries[i_1];
if (e.MightBeRacilyClean(smudge_s, smudge_ns))
{
e.SmudgeRacilyClean();
}
e.Write(dos);
}
if (writeTree)
{
TemporaryBuffer bb = new TemporaryBuffer.LocalFile();
tree.Write(tmp, bb);
bb.Close();
NB.EncodeInt32(tmp, 0, EXT_TREE);
NB.EncodeInt32(tmp, 4, (int)bb.Length());
dos.Write(tmp, 0, 8);
bb.WriteTo(dos, null);
}
writeIndexChecksum = foot.Digest();
os.Write(writeIndexChecksum);
os.Close();
}
