private void WriteHeader()
{
Array.Copy(Constants.PACK_SIGNATURE, 0, _buf, 0, 4);
NB.encodeInt32(_buf, 4, PackVersionGenerated);
NB.encodeInt32(_buf, 8, getObjectsNumber());
_pos.Write(_buf, 0, 12);
}
/// <summary>
///
/// </summary>
/// <param name="pIdx"></param>
/// <param name="when">
/// New cached modification date of the file, in milliseconds.
/// </param>
private void EncodeTimestamp(int pIdx, long when)
{
int @base = _infoOffset + pIdx;
NB.encodeInt32(_info, @base, (int)(when / 1000));
NB.encodeInt32(_info, @base + 4, ((int)(when % 1000)) * 1000000);
}
/// <summary>
/// Copy this ObjectId to a byte array.
/// </summary>
/// <param name="buf">the buffer to copy to.</param>
/// <param name="off">the offset within b to write at.</param>
public void copyRawTo(byte[] buf, int off)
{
NB.encodeInt32(buf, 0 + off, W1);
NB.encodeInt32(buf, 4 + off, W2);
NB.encodeInt32(buf, 8 + off, W3);
NB.encodeInt32(buf, 12 + off, W4);
NB.encodeInt32(buf, 16 + off, W5);
}
private void WriteCRCs()
{
foreach (PackedObjectInfo oe in entries)
{
NB.encodeInt32(tmp, 0, oe.CRC);
_stream.BaseStream.Write(tmp, 0, 4);
}
}
private void WriteTo(Stream os)
{
MessageDigest foot = Constants.newMessageDigest();
var dos = new DigestOutputStream(os, foot);
// Write the header.
//
var tmp = new byte[128];
Array.Copy(SigDirc, 0, tmp, 0, SigDirc.Length);
NB.encodeInt32(tmp, 4, /* version */ 2);
NB.encodeInt32(tmp, 8, _entryCnt);
dos.Write(tmp, 0, 12);
// Write the individual file entries.
//
if (_lastModified <= 0)
{
// Write a new index, as no entries require smudging.
//
for (int i = 0; i < _entryCnt; i++)
{
_sortedEntries[i].write(dos);
}
}
else
{
int smudge_s = (int)(_lastModified / 1000);
int smudge_ns = ((int)(_lastModified % 1000)) * 1000000;
for (int i = 0; i < _entryCnt; i++)
{
DirCacheEntry e = _sortedEntries[i];
if (e.mightBeRacilyClean(smudge_s, smudge_ns))
{
e.smudgeRacilyClean();
}
e.write(dos);
}
}
if (_cacheTree != null)
{
var bb = new LocalFileBuffer();
_cacheTree.write(tmp, bb);
bb.close();
NB.encodeInt32(tmp, 0, ExtTree);
NB.encodeInt32(tmp, 4, (int)bb.Length);
dos.Write(tmp, 0, 8);
bb.writeTo(dos, null);
}
var hash = foot.Digest();
os.Write(hash, 0, hash.Length);
os.Close();
}
private void WriteTo(Stream os)
{
MessageDigest foot = Constants.newMessageDigest();
var dos = new DigestOutputStream(os, foot);
// Write the header.
//
var tmp = new byte[128];
Array.Copy(SigDirc, 0, tmp, 0, SigDirc.Length);
NB.encodeInt32(tmp, 4, /* version */ 2);
NB.encodeInt32(tmp, 8, _entryCnt);
dos.Write(tmp, 0, 12);
// Write the individual file entries.
//
if (_lastModified == DateTime.MinValue)
{
// Write a new index, as no entries require smudging.
//
for (int i = 0; i < _entryCnt; i++)
{
_sortedEntries[i].write(dos);
}
}
else
{
var smudge_s = _lastModified.ToUnixTime();
var smudge_ns = _lastModified.Millisecond * 1000000; // [henon] <--- this could be done with much more precision in C# since DateTime has 100 nanosec ticks
for (int i = 0; i < _entryCnt; i++)
{
DirCacheEntry e = _sortedEntries[i];
if (e.mightBeRacilyClean(smudge_s, smudge_ns))
{
e.smudgeRacilyClean();
}
e.write(dos);
}
}
if (_cacheTree != null)
{
var bb = new TemporaryBuffer();
_cacheTree.write(tmp, bb);
bb.close();
NB.encodeInt32(tmp, 0, ExtTree);
NB.encodeInt32(tmp, 4, (int)bb.Length);
dos.Write(tmp, 0, 8);
bb.writeTo(dos, null);
}
var hash = foot.Digest();
os.Write(hash, 0, hash.Length);
os.Close();
}
/// <summary>
/// Copy this ObjectId to an output writer in hex format.
/// </summary>
/// <param name="s">the stream to copy to.</param>
public void copyRawTo(Stream s)
{
var buf = new byte[20];
NB.encodeInt32(buf, 0, W1);
NB.encodeInt32(buf, 4, W2);
NB.encodeInt32(buf, 8, W3);
NB.encodeInt32(buf, 12, W4);
NB.encodeInt32(buf, 16, W5);
s.Write(buf, 0, 20);
}
/// <summary>
/// Set the file mode for this entry.
/// </summary>
/// <param name="mode"> The new mode constant. </param>
public void setFileMode(FileMode mode)
{
switch (mode.Bits & FileMode.TYPE_MASK)
{
case FileMode.TYPE_MISSING:
case FileMode.TYPE_TREE:
throw new ArgumentException("Invalid mode " + mode.Bits
+ " for path " + getPathString());
}
NB.encodeInt32(_info, _infoOffset + PMode, mode.Bits);
}
public void testEncodeInt32()
{
var @out = new byte[16];
PrepareOutput(@out);
NB.encodeInt32(@out, 0, 0);
AssertOutput(b(0, 0, 0, 0), @out, 0);
PrepareOutput(@out);
NB.encodeInt32(@out, 3, 0);
AssertOutput(b(0, 0, 0, 0), @out, 3);
PrepareOutput(@out);
NB.encodeInt32(@out, 0, 3);
AssertOutput(b(0, 0, 0, 3), @out, 0);
PrepareOutput(@out);
NB.encodeInt32(@out, 3, 3);
AssertOutput(b(0, 0, 0, 3), @out, 3);
PrepareOutput(@out);
NB.encodeInt32(@out, 0, 0xdeac);
AssertOutput(b(0, 0, 0xde, 0xac), @out, 0);
PrepareOutput(@out);
NB.encodeInt32(@out, 3, 0xdeac);
AssertOutput(b(0, 0, 0xde, 0xac), @out, 3);
PrepareOutput(@out);
unchecked
{
NB.encodeInt32(@out, 0, (int)0xdeac9853);
}
AssertOutput(b(0xde, 0xac, 0x98, 0x53), @out, 0);
PrepareOutput(@out);
unchecked
{
NB.encodeInt32(@out, 3, (int)0xdeac9853);
}
AssertOutput(b(0xde, 0xac, 0x98, 0x53), @out, 3);
PrepareOutput(@out);
NB.encodeInt32(@out, 3, -1);
AssertOutput(b(0xff, 0xff, 0xff, 0xff), @out, 3);
}
internal override void WriteInternal()
{
WriteFanOutTable();
foreach (PackedObjectInfo oe in entries)
{
if (!CanStore(oe))
{
throw new IOException("Pack too large for index version 1");
}
NB.encodeInt32(tmp, 0, (int)oe.Offset);
oe.copyRawTo(tmp, 4);
_stream.Write(tmp, 0, tmp.Length);
}
WriteChecksumFooter();
}
private void WriteOffset32()
{
int o64 = 0;
foreach (PackedObjectInfo oe in entries)
{
long o = oe.Offset;
if (o < int.MaxValue)
{
NB.encodeInt32(tmp, 0, (int)o);
}
else
{
NB.encodeInt32(tmp, 0, (1 << 31) | o64++);
}
_stream.BaseStream.Write(tmp, 0, 4);
}
}
/// <summary>
/// utput the standard 256 entry first-level fan-out table.
/// <para />
/// 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="AnyObjectId.GetFirstByte()"/> matches the count's position in the
/// fan-out table.
/// </summary>
internal void WriteFanOutTable()
{
int[] fanout = new int[256];
foreach (PackedObjectInfo po in entries)
{
fanout[po.GetFirstByte() & 0xff]++;
}
for (int i = 1; i < 256; i++)
{
fanout[i] += fanout[i - 1];
}
foreach (int n in fanout)
{
NB.encodeInt32(tmp, 0, n);
_stream.Write(tmp, 0, 4);
}
}
/// <summary>
/// Output the version 2 (and later) TOC header, with version number.
/// <para />
/// 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.
/// </summary>
/// <param name="version">Version number of this index format being written.</param>
internal void WriteTOC(int version)
{
_stream.Write(TOC);
NB.encodeInt32(tmp, 0, version);
_stream.Write(tmp, 0, 4);
}
/// <summary>
/// Set the cached size (in bytes) of this file.
/// </summary>
/// <param name="sz">new cached size of the file, as bytes.</param>
public void setLength(int sz)
{
NB.encodeInt32(_info, _infoOffset + PSize, sz);
}
private void FixHeaderFooter(IEnumerable <byte> origcsum, IEnumerable <byte> tailcsum)
{
MessageDigest origDigest = Constants.newMessageDigest();
MessageDigest tailDigest = Constants.newMessageDigest();
long origRemaining = _originalEof;
_packOut.Seek(0, SeekOrigin.Begin);
_bAvail = 0;
_bOffset = 0;
FillFromFile(12);
{
var origCnt = (int)Math.Min(_bAvail, origRemaining);
origDigest.Update(_buffer, 0, origCnt);
origRemaining -= origCnt;
if (origRemaining == 0)
{
tailDigest.Update(_buffer, origCnt, _bAvail - origCnt);
}
}
NB.encodeInt32(_buffer, 8, _entryCount);
_packOut.Seek(0, SeekOrigin.Begin);
_packOut.Write(_buffer, 0, 12);
_packOut.Seek(_bAvail, SeekOrigin.Begin);
_packDigest.Reset();
_packDigest.Update(_buffer, 0, _bAvail);
while (true)
{
int n = _packOut.Read(_buffer, 0, _buffer.Length);
if (n <= 0)
{
break;
}
if (origRemaining != 0)
{
var origCnt = (int)Math.Min(n, origRemaining);
origDigest.Update(_buffer, 0, origCnt);
origRemaining -= origCnt;
if (origRemaining == 0)
{
tailDigest.Update(_buffer, origCnt, n - origCnt);
}
}
else
{
tailDigest.Update(_buffer, 0, n);
}
_packDigest.Update(_buffer, 0, n);
}
if (!origDigest.Digest().SequenceEqual(origcsum) || !tailDigest.Digest().SequenceEqual(tailcsum))
{
throw new IOException("Pack corrupted while writing to filesystem");
}
_packcsum = _packDigest.Digest();
_packOut.Write(_packcsum, 0, _packcsum.Length);
}
/// <summary>
/// Set the file mode for this entry.
/// </summary>
/// <param name="mode"> The new mode constant. </param>
public void setFileMode(FileMode mode)
{
NB.encodeInt32(_info, _infoOffset + PMode, mode.Bits);
}
