/// <summary>Create an empty entry at the specified stage.</summary>
/// <remarks>Create an empty entry at the specified stage.</remarks>
/// <param name="newPath">name of the cache entry, in the standard encoding.</param>
/// <param name="stage">the stage index of the new entry.</param>
/// <exception cref="System.ArgumentException">
/// If the path starts or ends with "/", or contains "//" either
/// "\0". These sequences are not permitted in a git tree object
/// or DirCache file. Or if
/// <code>stage</code>
/// is outside of the
/// range 0..3, inclusive.
/// </exception>
public DirCacheEntry(byte[] newPath, int stage)
{
if (!IsValidPath(newPath))
{
throw new InvalidPathException(ToString(newPath));
}
if (stage < 0 || 3 < stage)
{
throw new ArgumentException(MessageFormat.Format(JGitText.Get().invalidStageForPath
, stage, ToString(newPath)));
}
info = new byte[INFO_LEN];
infoOffset = 0;
path = newPath;
int flags = ((stage & unchecked ((int)(0x3))) << 12);
if (path.Length < NAME_MASK)
{
flags |= path.Length;
}
else
{
flags |= NAME_MASK;
}
NB.EncodeInt16(info, infoOffset + P_FLAGS, flags);
}
/// <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);
}
/// <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));
}
