internal static LogRowData CreateData(Stream stream, LogRowIndex index)
{
byte[] buffer = new byte[index.RowLength + 2];
char[] chars = new char[index.RowLength];
if (stream.Position != index.RowStart)
{
stream.Seek(index.RowStart, SeekOrigin.Begin);
}
stream.Read(buffer, 0, index.RowLength);
int length = buffer.IndexOf((byte)'\r', 0);
if (length == -1)
{
length = buffer.IndexOf((byte)'\n', 0);
}
for (int i = 0; i < length; i++)
{
chars[i] = (char)buffer[i];
}
index.GetValues(out int timeStampIndex, out int nameIndex, out int userIndex, out int cycleIndex, out int valueIndex);
var itemId = new string(chars, nameIndex, index.NameLength);
var timeStamp = LogRowDataFactory.ParseDate(chars, 0, LogRowIndex.TimeStampLength);
var user = new string(chars, userIndex, index.UserLength);
var cycleIndexValue = long.Parse(new string(chars, cycleIndex, index.CycleLength), NumberStyles.None);
var value = new string(chars, valueIndex, length - valueIndex);
return(new LogRowData(timeStamp, itemId, user, cycleIndexValue, value));
}
internal void Add(string item, LogRowIndex index)
{
List <LogRowIndex> indexByItem;
if (!IndexesByItem.TryGetValue(item, out indexByItem))
{
indexByItem = new List <LogRowIndex>();
IndexesByItem.Add(item, indexByItem);
}
indexByItem.Add(index);
Indexes.Add(index);
Count++;
}
internal static void ParseRow(char[] rowBuffer, int rowLength, long startPos, char separator, out LogRowIndex index, out string itemID)
{
ushort[] lengths = new ushort[3];
int rowIndex = LogRowIndex.TimeStampLength;
for (var i = 0; i < lengths.Length; i++)
{
int lastIndex = rowIndex;
rowIndex = rowBuffer.IndexOf(separator, rowIndex + 1);
lengths[i] = (ushort)(rowIndex - 1 - lastIndex);
}
itemID = new string(rowBuffer, LogRowIndex.TimeStampLength + 1, lengths[0]);
index = new LogRowIndex(startPos, (ushort)rowLength, lengths[0], lengths[1], (byte)lengths[2]);
}
public LogRowIndex[] GetItemRows(string itemID, int fromIndex, int length)
{
m_Lock.EnterReadLock();
try
{
LogRowIndex[] res = new LogRowIndex[length];
List <LogRowIndex> items = m_RowIndexes[itemID];
length = Math.Min(length, items.Count);
for (int index = 0; index < length; index++)
{
res[index] = items[fromIndex + index];
}
return(res);
}
finally
{
m_Lock.ExitReadLock();
}
}
internal static LogRowDataPoint CreateDataPoint(PagedStreamReader reader, LogRowIndex index)
{
byte[] buffer = new byte[index.RowLength];
char[] chars = new char[index.RowLength];
reader.Read(buffer, index.RowStart, index.RowLength);
int length = buffer.IndexOf((byte)'\r', 0);
if (length == -1)
{
length = buffer.IndexOf((byte)'\n', 0);
}
for (int i = 0; i < length; i++)
{
chars[i] = (char)buffer[i];
}
index.GetValues(out int timeStampIndex, out int nameIndex, out int userIndex, out int cycleIndex, out int valueIndex);
var timeStamp = ParseDate(chars, 0, LogRowIndex.TimeStampLength); //, "yyyy-MM-dd hh:mm:ss.fff", culture);
string valueString = new string(chars, valueIndex, length - valueIndex);
double value;
if (!double.TryParse(valueString, NumberStyles.Any, m_Culture, out double val))
{
value = valueString == "True" ? 1d : 0d;
}
else
{
value = val;
}
return(new LogRowDataPoint(timeStamp, value));
}
private void AddLogRowIndex(string itemID, RowIndexCollection indexCollection, LogRowIndex index)
{
if (m_FilteredItems == null)
{
indexCollection.Add(itemID, index);
}
else if (m_FilteredItems.Contains(itemID))
{
indexCollection.Add(itemID, index);
}
}
public LogRowData GetData(LogRowIndex index)
{
return(GetData(new[] { index }).First());
}
public LogRowDataPoint GetDataPoint(LogRowIndex index)
{
return(GetDataPoints(new[] { index }).First());
}