/// <summary>Copy the ObjectId and other meta fields from an existing entry.</summary>
/// <remarks>
/// Copy the ObjectId and other meta fields from an existing entry.
/// <p>
/// This method copies everything except the path from one entry to another,
/// supporting renaming.
/// </remarks>
/// <param name="src">the entry to copy ObjectId and meta fields from.</param>
public virtual void CopyMetaData(NGit.Dircache.DirCacheEntry src)
{
int pLen = NB.DecodeUInt16(info, infoOffset + P_FLAGS) & NAME_MASK;
System.Array.Copy(src.info, src.infoOffset, info, infoOffset, INFO_LEN);
NB.EncodeInt16(info, infoOffset + P_FLAGS, pLen | NB.DecodeUInt16(info, infoOffset
+ P_FLAGS) & ~NAME_MASK);
}
private int GetExtendedFlags()
{
if (IsExtended)
{
return(NB.DecodeUInt16(info, infoOffset + P_FLAGS2) << 16);
}
else
{
return(0);
}
}
/// <summary>Copy the ObjectId and other meta fields from an existing entry.</summary>
/// <remarks>
/// Copy the ObjectId and other meta fields from an existing entry.
/// <p>
/// This method copies everything except the path and possibly stage from one
/// entry to another, supporting renaming.
/// </remarks>
/// <param name="src">the entry to copy ObjectId and meta fields from.</param>
/// <param name="keepStage">if true, the stage attribute will not be copied</param>
internal virtual void CopyMetaData(NGit.Dircache.DirCacheEntry src, bool keepStage
)
{
int origflags = NB.DecodeUInt16(info, infoOffset + P_FLAGS);
int newflags = NB.DecodeUInt16(src.info, src.infoOffset + P_FLAGS);
System.Array.Copy(src.info, src.infoOffset, info, infoOffset, INFO_LEN);
int pLen = origflags & NAME_MASK;
int SHIFTED_STAGE_MASK = unchecked ((int)(0x3)) << 12;
int pStageShifted;
if (keepStage)
{
pStageShifted = origflags & SHIFTED_STAGE_MASK;
}
else
{
pStageShifted = newflags & SHIFTED_STAGE_MASK;
}
NB.EncodeInt16(info, infoOffset + P_FLAGS, pStageShifted | pLen | (newflags & ~NAME_MASK
& ~SHIFTED_STAGE_MASK));
}
/// <exception cref="System.IO.IOException"></exception>
internal DirCacheEntry(byte[] sharedInfo, MutableInteger infoAt, InputStream @in,
MessageDigest md, int smudge_s, int smudge_ns)
{
// private static final int P_CTIME_NSEC = 4;
// private static final int P_MTIME_NSEC = 12;
// private static final int P_DEV = 16;
// private static final int P_INO = 20;
// private static final int P_UID = 28;
// private static final int P_GID = 32;
info = sharedInfo;
infoOffset = infoAt.value;
IOUtil.ReadFully(@in, info, infoOffset, INFO_LEN);
int len;
if (IsExtended)
{
len = INFO_LEN_EXTENDED;
IOUtil.ReadFully(@in, info, infoOffset + INFO_LEN, INFO_LEN_EXTENDED - INFO_LEN);
if ((GetExtendedFlags() & ~EXTENDED_FLAGS) != 0)
{
throw new IOException(MessageFormat.Format(JGitText.Get().DIRCUnrecognizedExtendedFlags
, GetExtendedFlags().ToString()));
}
}
else
{
len = INFO_LEN;
}
infoAt.value += len;
md.Update(info, infoOffset, len);
int pathLen = NB.DecodeUInt16(info, infoOffset + P_FLAGS) & NAME_MASK;
int skipped = 0;
if (pathLen < NAME_MASK)
{
path = new byte[pathLen];
IOUtil.ReadFully(@in, path, 0, pathLen);
md.Update(path, 0, pathLen);
}
else
{
ByteArrayOutputStream tmp = new ByteArrayOutputStream();
{
byte[] buf = new byte[NAME_MASK];
IOUtil.ReadFully(@in, buf, 0, NAME_MASK);
tmp.Write(buf);
}
for (; ;)
{
int c = @in.Read();
if (c < 0)
{
throw new EOFException(JGitText.Get().shortReadOfBlock);
}
if (c == 0)
{
break;
}
tmp.Write(c);
}
path = tmp.ToByteArray();
pathLen = path.Length;
skipped = 1;
// we already skipped 1 '\0' above to break the loop.
md.Update(path, 0, pathLen);
md.Update(unchecked ((byte)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 = len + pathLen;
int expLen = (actLen + 8) & ~7;
int padLen = expLen - actLen - skipped;
if (padLen > 0)
{
IOUtil.SkipFully(@in, padLen);
md.Update(nullpad, 0, padLen);
}
if (MightBeRacilyClean(smudge_s, smudge_ns))
{
SmudgeRacilyClean();
}
}
