/// <summary>
/// Copy the ObjectId and other meta fields from an existing entry.
/// <para />
/// This method copies everything except the path from one entry to another,
/// supporting renaming.
/// </summary>
/// <param name="src">
/// The entry to copy ObjectId and meta fields from.
/// </param>
public void copyMetaData(DirCacheEntry src)
{
int pLen = NB.decodeUInt16(_info, _infoOffset + PFlags) & NameMask;
Array.Copy(src._info, src._infoOffset, _info, _infoOffset, INFO_LEN);
NB.encodeInt16(_info, _infoOffset + PFlags, pLen
| NB.decodeUInt16(_info, _infoOffset + PFlags) & ~NameMask);
}
public void testDecodeUInt16()
{
Assert.AreEqual(0, NB.decodeUInt16(b(0, 0), 0));
Assert.AreEqual(0, NB.decodeUInt16(Padb(3, 0, 0), 3));
Assert.AreEqual(3, NB.decodeUInt16(b(0, 3), 0));
Assert.AreEqual(3, NB.decodeUInt16(Padb(3, 0, 3), 3));
Assert.AreEqual(0xde03, NB.decodeUInt16(b(0xde, 3), 0));
Assert.AreEqual(0xde03, NB.decodeUInt16(Padb(3, 0xde, 3), 3));
Assert.AreEqual(0x03de, NB.decodeUInt16(b(3, 0xde), 0));
Assert.AreEqual(0x03de, NB.decodeUInt16(Padb(3, 3, 0xde), 3));
Assert.AreEqual(0xffff, NB.decodeUInt16(b(0xff, 0xff), 0));
Assert.AreEqual(0xffff, NB.decodeUInt16(Padb(3, 0xff, 0xff), 3));
}
public DirCacheEntry(byte[] sharedInfo, int infoAt, Stream @in, MessageDigest md)
{
_info = sharedInfo;
_infoOffset = infoAt;
IO.ReadFully(@in, _info, _infoOffset, INFO_LEN);
md.Update(_info, _infoOffset, INFO_LEN);
int pathLen = NB.decodeUInt16(_info, _infoOffset + PFlags) & NameMask;
int skipped = 0;
if (pathLen < NameMask)
{
_path = new byte[pathLen];
IO.ReadFully(@in, _path, 0, pathLen);
md.Update(_path, 0, pathLen);
}
else
{
var tmp = new MemoryStream();
{
var buf = new byte[NameMask];
IO.ReadFully(@in, buf, 0, NameMask);
tmp.Write(buf, 0, buf.Length);
}
while (true)
{
int c = @in.ReadByte();
if (c < 0)
{
throw new EndOfStreamException("Short Read of block.");
}
if (c == 0)
{
break;
}
tmp.Write(new[] { (byte)c }, 0, 1);
}
_path = tmp.ToArray();
pathLen = _path.Length;
skipped = 1; // we already skipped 1 '\0' above to break the loop.
md.Update(_path, 0, pathLen);
md.Update(0);
}
// Index records are padded out to the next 8 byte alignment
// for historical reasons related to how C Git Read the files.
//
int actLen = INFO_LEN + pathLen;
int expLen = (actLen + 8) & ~7;
int padLen = expLen - actLen - skipped;
if (padLen > 0)
{
IO.skipFully(@in, padLen);
md.Update(NullPad, 0, padLen);
}
}