internal IEnumerable <StorageData <T> > ReadOnlyEnumerate()
{
// MGREC files may not exist
//// the total number of records
//long count = _recfileread.Length >> 3;
//for (long i = 0; i < count; i++)
//{
// StorageItem<T> meta;
// byte[] data = ReadBytes(i, out meta);
// StorageData<T> sd = new StorageData<T>();
// sd.meta = meta;
// if (meta.dataLength > 0)
// sd.data = data;
// yield return sd;
//}
long offset = _fileheader.Length;// start; // skip header
long size = _dataread.Length;
while (offset < size)
{
StorageData <T> sd = new StorageData <T>();
lock (_readlock)
{
_dataread.Seek(offset, SeekOrigin.Begin);
int metalen = 0;
StorageItem <T> meta = ReadMetaData(_dataread, out metalen);
offset += metalen;
sd.meta = meta;
if (meta.dataLength > 0)
{
byte[] data = new byte[meta.dataLength];
_dataread.Read(data, 0, meta.dataLength);
sd.data = data;
}
offset += meta.dataLength;
}
yield return(sd);
}
}
internal IEnumerable <StorageData> Enumerate()
{
lock (_lock)
{
long offset = 6;
long size = _dataread.Length;
while (offset < size)
{
// skip header
_dataread.Seek(offset, SeekOrigin.Begin);
var hdr = new byte[_rowheader.Length];
// read header
_dataread.Read(hdr, 0, _rowheader.Length);
offset += hdr.Length;
if (CheckHeader(hdr))
{
var sd = new StorageData {
isDeleted = IsDeleted(hdr)
};
byte kl = hdr[3];
var kbyte = new byte[kl];
offset += kl;
_dataread.Read(kbyte, 0, kl);
sd.Key = kbyte;
int dl = Helper.ToInt32(hdr, (int)HDR_POS.DataLength);
var data = new byte[dl];
// read data block
_dataread.Read(data, 0, dl);
sd.Data = data;
offset += dl;
yield return(sd);
}
else
{
throw new Exception("Data read failed");
}
}
}
}