public byte[] GetRecord(AnalogIndex indexRecord)
{
if (indexRecord.RecordLength > 10 * 1024 * 1024 || indexRecord.RecordLength < 8)
{
return(null); //超过10M的记录或者不存在一条记录
}
byte[] data = new byte[indexRecord.RecordLength];
long fileSize = fileStream.Length;
fileStream.Position = indexRecord.BeginOffset;
if (fileSize >= indexRecord.BeginOffset + indexRecord.RecordLength)
{
fileStream.Read(data, 0, data.Length);
}
else
{
int size1 = (int)(fileSize - indexRecord.BeginOffset);
if (size1 > 0)
{
fileStream.Read(data, 0, size1);
}
int size2 = indexRecord.RecordLength - size1;
if (size2 > 0)
{
fileStream.Position = 0;
fileStream.Read(data, size1, size2);
}
}
return(data);
}
public byte[] GetRecord(AnalogIndex indexRecord)
{
if (indexRecord.RecordLength > 10 * 1024 * 1024 || indexRecord.RecordLength<8) return null; //超过10M的记录或者不存在一条记录
byte[] data=new byte[indexRecord.RecordLength];
long fileSize = fileStream.Length;
fileStream.Position = indexRecord.BeginOffset;
if (fileSize >= indexRecord.BeginOffset + indexRecord.RecordLength)
{
fileStream.Read(data, 0, data.Length);
}
else
{
int size1=(int)(fileSize-indexRecord.BeginOffset);
if(size1>0)
{
fileStream.Read(data, 0, size1);
}
int size2 = indexRecord.RecordLength - size1;
if (size2 > 0)
{
fileStream.Position = 0;
fileStream.Read(data, size1, size2);
}
}
return data;
}
public void Store(AnalogIndex record)
{
if (fileStream != null)
{
byte[] data = record.GetBytes();
fileStream.Position = record.Index * AnalogIndex.IndexSize;
fileStream.Write(data, 0, data.Length);
fileStream.Flush();
}
}
public int CompareTo(object obj)
{
AnalogIndex record = obj as AnalogIndex;
if (record.FileIndex == this.FileIndex)
{
return(record.Index - this.Index);
}
else
{
return(record.FileIndex - this.FileIndex);
}
}
public bool ConflictWith(AnalogIndex other, long maxFileSize)
{
long[] sect1 = new long[4];
long[] sect2 = new long[4];
long leftLen = maxFileSize - this.BeginOffset;
sect1[0] = this.BeginOffset;
sect1[1] = leftLen > this.RecordLength ? this.RecordLength : leftLen;
sect1[2] = 0;
sect1[3] = this.RecordLength - leftLen;
leftLen = maxFileSize - other.BeginOffset;
sect2[0] = other.BeginOffset;
sect2[1] = leftLen > other.RecordLength ? other.RecordLength : leftLen;
sect2[2] = 0;
sect2[3] = other.RecordLength - leftLen;
for (int i = 0; i < sect1.Length / 2; i++)
{
long sec1Size = sect1[i * 2 + 1];
if (sec1Size <= 0)
{
continue;
}
long sec1Begin = sect1[i * 2];
for (int j = 0; j < sect2.Length / 2; j++)
{
long sec2Size = sect2[j * 2 + 1];
if (sec2Size <= 0)
{
continue;
}
long sec2Begin = sect2[j * 2];
if (sec2Begin >= sec1Begin + sec1Size)
{
continue;
}
if (sec1Begin >= sec2Begin + sec2Size)
{
continue;
}
return(true);
}
}
return(false);
}
public AnalogIndexFile(AnalogFile analog)
{
this.fileAnalog = analog;
byte[] buffer = new byte[IndexCount * 32];
Array.Clear(buffer, 0, buffer.Length);
try
{
string indexName = Path.Combine(analog.DataManager.StoreDir, analog.Type.ToString("X2") + "H-" + analog.Index.ToString("000") + ".idx");
fileStream = new FileStream(indexName, FileMode.OpenOrCreate, FileAccess.ReadWrite);
if (fileStream.Length < buffer.Length)
{
fileStream.SetLength(buffer.Length); //默认建立16KB的文件
}
fileStream.Read(buffer, 0, buffer.Length);
}
catch
{
fileStream = null;
}
for (int i = 0; i < IndexCount; i++)
{
AnalogIndex indexRecord = new AnalogIndex(i, buffer, i * 32);
listIndex.Add(indexRecord);
}
listIndex.Sort();
//TODO:必须加入对重叠的Index处理
for (int i = 0; i < listIndex.Count; i++)
{
if (listIndex[i].IsValid == false)
{
break;
}
for (int j = i + 1; j < listIndex.Count; j++)
{
if (listIndex[j].IsValid && listIndex[j].ConflictWith(listIndex[i], this.fileAnalog.MaxFileSize))
{
for (int k = j; k < listIndex.Count; k++)
{
listIndex[k].FileIndex = 0; //设置为无效
}
break;
}
}
}
}
List<AnalogIndex> listIndex = new List<AnalogIndex>(); //按文件记录索引排序
#endregion Fields
#region Constructors
public AnalogIndexFile(AnalogFile analog)
{
this.fileAnalog = analog;
byte[] buffer = new byte[IndexCount * 32];
Array.Clear(buffer, 0, buffer.Length);
try
{
string indexName = Path.Combine(analog.DataManager.StoreDir, analog.Type.ToString("X2") + "H-" + analog.Index.ToString("000") + ".idx");
fileStream = new FileStream(indexName, FileMode.OpenOrCreate, FileAccess.ReadWrite);
if (fileStream.Length < buffer.Length)
{
fileStream.SetLength(buffer.Length); //默认建立16KB的文件
}
fileStream.Read(buffer, 0, buffer.Length);
}
catch
{
fileStream = null;
}
for (int i = 0; i < IndexCount; i++)
{
AnalogIndex indexRecord = new AnalogIndex(i, buffer, i * 32);
listIndex.Add(indexRecord);
}
listIndex.Sort();
//TODO:必须加入对重叠的Index处理
for (int i = 0; i < listIndex.Count; i++)
{
if (listIndex[i].IsValid == false) break;
for (int j = i + 1; j < listIndex.Count; j++)
{
if (listIndex[j].IsValid && listIndex[j].ConflictWith(listIndex[i], this.fileAnalog.MaxFileSize))
{
for (int k = j; k < listIndex.Count; k++)
{
listIndex[k].FileIndex = 0; //设置为无效
}
break;
}
}
}
}
public void Store(AnalogIndex index, byte[] data, int length)
{
long offset = index.BeginOffset;
long fileSize=fileStream.Length;
long needSize = offset + index.RecordLength + length;
long wrPos = (index.RecordLength + offset)%fileAnalog.MaxFileSize;
if (needSize <= fileAnalog.MaxFileSize)//直接写入
{
if (fileSize < needSize)
{
fileStream.SetLength(fileSize + IncreaseSize);
}
fileStream.Position = wrPos;
fileStream.Write(data, 0, length);
fileStream.Flush();
}
else
{
long leftSize = fileSize - wrPos;
int size1 = (int)(leftSize < length ? leftSize : length);
int size2 = length - size1;
if (size1 > 0)
{
fileStream.Position = wrPos;
fileStream.Write(data, 0, size1);
}
if (size2 > 0)
{
fileStream.Position = 0;
fileStream.Write(data, size1, size2);
}
fileStream.Flush();
}
index.RecordLength = index.RecordLength + length;
}
public void Store(AnalogIndex index, byte[] data, int length)
{
long offset = index.BeginOffset;
long fileSize = fileStream.Length;
long needSize = offset + index.RecordLength + length;
long wrPos = (index.RecordLength + offset) % fileAnalog.MaxFileSize;
if (needSize <= fileAnalog.MaxFileSize)//直接写入
{
if (fileSize < needSize)
{
fileStream.SetLength(fileSize + IncreaseSize);
}
fileStream.Position = wrPos;
fileStream.Write(data, 0, length);
fileStream.Flush();
}
else
{
long leftSize = fileSize - wrPos;
int size1 = (int)(leftSize < length ? leftSize : length);
int size2 = length - size1;
if (size1 > 0)
{
fileStream.Position = wrPos;
fileStream.Write(data, 0, size1);
}
if (size2 > 0)
{
fileStream.Position = 0;
fileStream.Write(data, size1, size2);
}
fileStream.Flush();
}
index.RecordLength = index.RecordLength + length;
}
public AnalogIndex NewIndex()
{
AnalogIndex recordLast = listIndex[listIndex.Count - 1];
AnalogIndex recordFirst = listIndex[0];
recordLast.BeginOffset = 0;
if (recordFirst.IsValid) //有效
{
recordLast.BeginOffset = (uint)((recordFirst.BeginOffset + recordFirst.RealLength) % fileAnalog.MaxFileSize);
}
recordLast.FileIndex = recordFirst.FileIndex + 1; //文件记录索引
recordLast.RecordLength = 0; //记录长度
recordLast.RealLength = 0;
recordLast.BeginTime = DateTime.MinValue;
recordLast.EndTime = DateTime.MinValue;
lock (listIndex)
{
listIndex.Remove(recordLast);
listIndex.Insert(0, recordLast);
}
return(recordLast);
}
public bool Process()
{
List <AnalogPoint> listDayPoint = new List <AnalogPoint>();
IList <AnalogIndex> indexAll = fileAnalog.IndexFile.AllIndex;
for (int i = indexAll.Count - 1; i >= 0; i--)
{
AnalogIndex recordIndex = indexAll[i];
if (recordIndex.IsValid == false)
{
continue;
}
if (recordIndex.BeginTime > this.timeEnd)
{
continue;
}
if (recordIndex.EndTime < this.timeBegin)
{
continue;
}
if (recordIndex.Type == FallbackType.Fallback) //回溯数据
{
if (listDayPoint.Count > 0)
{
listAllPoit.Add(listDayPoint);
listDayPoint = new List <AnalogPoint>();
}
}
//读取全部数据
byte[] data = fileAnalog.DataFile.GetRecord(recordIndex);
if (data == null)
{
continue;
}
int cnt = data.Length / 8;
DateTime timeBase = recordIndex.BeginTime.Date;
if ((recordIndex.BeginTime >= this.timeBegin) && (recordIndex.EndTime <= this.timeEnd))
{
for (int j = 0; j < cnt; j++)
{
AnalogPoint pt = new AnalogPoint(timeBase, data, j * 8);
listDayPoint.Add(pt);
}
}
else
{
for (int j = 0; j < cnt; j++)
{
uint timeDiff = BitConverter.ToUInt32(data, j * 8);
byte digit = (byte)(timeDiff & 0x0f);
DateTime time = timeBase.AddMilliseconds(timeDiff >> 4);
if (time < this.timeBegin)
{
continue;
}
if (time > this.timeEnd)
{
break;
}
float analogValue = BitConverter.ToSingle(data, j * 8 + 4);
AnalogPoint pt = new AnalogPoint(time, analogValue, digit);
listDayPoint.Add(pt);
}
}
}
if (listDayPoint.Count > 0)
{
listAllPoit.Add(listDayPoint);
}
finishedEvent.Set();
return(true);
}
public void Store(AnalogIndex record)
{
if (fileStream != null)
{
byte[] data = record.GetBytes();
fileStream.Position = record.Index * AnalogIndex.IndexSize;
fileStream.Write(data, 0, data.Length);
fileStream.Flush();
}
}
public bool ConflictWith(AnalogIndex other,long maxFileSize)
{
long[] sect1 = new long[4];
long[] sect2 = new long[4];
long leftLen=maxFileSize-this.BeginOffset;
sect1[0] = this.BeginOffset;
sect1[1] = leftLen > this.RecordLength ? this.RecordLength : leftLen;
sect1[2] = 0;
sect1[3] = this.RecordLength-leftLen;
leftLen = maxFileSize - other.BeginOffset;
sect2[0] = other.BeginOffset;
sect2[1] = leftLen > other.RecordLength ? other.RecordLength : leftLen;
sect2[2] = 0;
sect2[3] = other.RecordLength - leftLen;
for (int i = 0; i < sect1.Length/2; i++)
{
long sec1Size = sect1[i * 2 + 1];
if (sec1Size <= 0) continue;
long sec1Begin = sect1[i * 2];
for (int j = 0; j < sect2.Length / 2; j++)
{
long sec2Size = sect2[j * 2 + 1];
if (sec2Size <= 0) continue;
long sec2Begin = sect2[j * 2];
if (sec2Begin >= sec1Begin + sec1Size) continue;
if (sec1Begin >= sec2Begin + sec2Size) continue;
return true;
}
}
return false;
}