public IrbisRecord[] ReadAllRecordVersions
(
int mfn
)
{
List <IrbisRecord> result = new List <IrbisRecord>();
IrbisRecord lastVersion = ReadRecord(mfn);
if (lastVersion != null)
{
result.Add(lastVersion);
while (true)
{
long offset = lastVersion.PreviousOffset;
if (offset == 0)
{
break;
}
MstRecord64 mstRecord = Mst.ReadRecord2(offset);
IrbisRecord previousVersion = mstRecord.DecodeRecord();
if (previousVersion != null)
{
result.Add(previousVersion);
lastVersion = previousVersion;
}
}
}
return(result.ToArray());
}
public IrbisRecord[] SearchReadSimple
(
string key
)
{
int[] mfns = InvertedFile.SearchSimple(key);
List <IrbisRecord> result = new List <IrbisRecord>();
foreach (int mfn in mfns)
{
try
{
XrfRecord64 xrfRecord = Xrf.ReadRecord(mfn);
if (!xrfRecord.Deleted)
{
MstRecord64 mstRecord
= Mst.ReadRecord2(xrfRecord.Offset);
if (!mstRecord.Deleted)
{
IrbisRecord irbisRecord
= mstRecord.DecodeRecord();
irbisRecord.Database = Database;
result.Add(irbisRecord);
}
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
}
return(result.ToArray());
}
public MstRecord64 ReadRecord2
(
long offset
)
{
if (_stream.Seek(offset, SeekOrigin.Begin) != offset)
{
throw new IOException();
}
Encoding encoding = new UTF8Encoding(false, true);
MemoryStream memory = new MemoryStream(PreloadLength);
_AppendStream(_stream, memory, PreloadLength);
memory.Position = 0;
MstRecordLeader64 leader = MstRecordLeader64.Read(memory);
int amountToRead = (int)(leader.Length - memory.Length);
if (amountToRead > 0)
{
_AppendStream(_stream, memory, amountToRead);
}
List <MstDictionaryEntry64> dictionary
= new List <MstDictionaryEntry64>();
for (int i = 0; i < leader.Nvf; i++)
{
MstDictionaryEntry64 entry = new MstDictionaryEntry64
{
Tag = memory.ReadInt32Network(),
Position = memory.ReadInt32Network(),
Length = memory.ReadInt32Network()
};
dictionary.Add(entry);
}
foreach (MstDictionaryEntry64 entry in dictionary)
{
long endOffset = leader.Base + entry.Position;
memory.Seek(endOffset, SeekOrigin.Begin);
entry.Bytes = memory.ReadBytes(entry.Length);
if (entry.Bytes != null)
{
entry.Text = encoding.GetString(entry.Bytes);
}
}
MstRecord64 result = new MstRecord64
{
Leader = leader,
Dictionary = dictionary
};
return(result);
}
public MstRecord64 ReadRecord
(
long offset
)
{
if (_stream.Seek(offset, SeekOrigin.Begin) != offset)
{
throw new IOException();
}
//new ObjectDumper()
// .DumpStream(_stream,offset,64)
// .WriteLine();
Encoding encoding = new UTF8Encoding(false, true);
MstRecordLeader64 leader = MstRecordLeader64.Read(_stream);
List <MstDictionaryEntry64> dictionary
= new List <MstDictionaryEntry64>();
for (int i = 0; i < leader.Nvf; i++)
{
MstDictionaryEntry64 entry = new MstDictionaryEntry64
{
Tag = _stream.ReadInt32Network(),
Position = _stream.ReadInt32Network(),
Length = _stream.ReadInt32Network()
};
dictionary.Add(entry);
}
foreach (MstDictionaryEntry64 entry in dictionary)
{
long endOffset = offset + leader.Base + entry.Position;
_stream.Seek(endOffset, SeekOrigin.Begin);
entry.Bytes = _stream.ReadBytes(entry.Length);
if (entry.Bytes != null)
{
entry.Text = encoding.GetString(entry.Bytes);
}
}
MstRecord64 result = new MstRecord64
{
Leader = leader,
Dictionary = dictionary
};
return(result);
}
public IrbisRecord ReadRecord
(
int mfn
)
{
XrfRecord64 xrfRecord = Xrf.ReadRecord(mfn);
if (xrfRecord.Offset == 0)
{
return(null);
}
MstRecord64 mstRecord = Mst.ReadRecord2(xrfRecord.Offset);
IrbisRecord result = mstRecord.DecodeRecord();
result.Database = Database;
return(result);
}
