private RecordInfo RequestRecord(string id, string subId, byte recordType, byte[] recordData, long minimumLength, long extraBuffer)
{
RecordInfo result = null;
if (!_emptyRecordListSorted)
{
_emptyRecords.Sort(delegate(RecordInfo x, RecordInfo y)
{
return x.Length.CompareTo(y.Length);
});
_emptyRecordListSorted = true;
}
result = (from a in _emptyRecords where a.Length >= minimumLength select a).FirstOrDefault();
if (result == null)
{
result = new RecordInfo();
result.Length = minimumLength + extraBuffer;
result.Offset = FileStream.Length;
result.ID = id;
result.SubID = subId;
result.FieldType = recordType;
result.Database = this;
FileStream.SetLength(result.Offset + result.Length);
//add index
if (_fileStreamIdx != null)
{
_fileStreamIdx.Position = _fileStreamIdx.Length;
byte[] buffer = new byte[117];
using (MemoryStream ms = new MemoryStream(buffer))
using (BinaryWriter bw = new BinaryWriter(ms))
{
result.OffsetIdx = _fileStreamIdx.Position;
ms.Position = 0;
bw.Write(result.Offset);
bw.Write(result.Length);
bw.Write(result.FieldType);
bw.Write(result.ID);
bw.Write(result.SubID);
_fileStreamIdx.Write(buffer, 0, 117);
}
}
}
else
{
//re-use of an empty record
result.ID = id;
result.SubID = subId;
_emptyRecords.Remove(result);
result.FieldType = recordType;
//change index
_fileStreamIdx.Position = result.OffsetIdx;
byte[] buffer = new byte[117];
using (MemoryStream ms = new MemoryStream(buffer))
using (BinaryWriter bw = new BinaryWriter(ms))
{
result.OffsetIdx = _fileStreamIdx.Position;
ms.Position = 0;
bw.Write(result.Offset);
bw.Write(result.Length);
bw.Write(result.FieldType);
bw.Write(result.ID);
bw.Write(result.SubID);
_fileStreamIdx.Write(buffer, 0, 117);
}
}
//write record header data
FileStream.Position = result.Offset + RECORD_POS_LENGTH;
BinaryWriter.Write(result.Length);
FileStream.Position = result.Offset + RECORD_POS_FIELDTYPE;
FileStream.WriteByte(recordType);
FileStream.Position = result.Offset + RECORD_POS_ID;
BinaryWriter.Write(result.ID);
BinaryWriter.Write(result.SubID);
//write data
FileStream.Position = result.Offset + 150;
FileStream.Write(recordData, 150, (int)minimumLength - 150);
//Flush();
return result;
}
public void DeleteRecord(RecordInfo ri)
{
FileStream.Position = ri.Offset + RECORD_POS_FIELDTYPE;
BinaryWriter.Write(RECORD_EMPTY);
_emptyRecords.Add(ri);
_emptyRecordListSorted = false;
if (_fileStreamIdx!=null)
{
_fileStreamIdx.Position = ri.OffsetIdx + 16;
_fileStreamIdx.WriteByte(RECORD_EMPTY);
}
}
private bool LoadDatabaseFile()
{
//index file not available
//create one
//this is an exception. (should be anyway)
//first create it in a temporary file and copy to target if finished
bool result = false;
bool cancelled = false;
try
{
string fn = string.Concat(FileName, ".gsx");
if (File.Exists(fn))
{
File.Delete(fn);
}
byte[] buffer = new byte[117];
using (TemporaryFile tf = new TemporaryFile())
using (FileStream fsIdx = File.Open(tf.Path, FileMode.OpenOrCreate, FileAccess.Write))
using (MemoryStream ms = new MemoryStream(buffer))
using (BinaryWriter bw = new BinaryWriter(ms))
{
long max = this.FileStream.Length;
DateTime nextUpdate = DateTime.Now.AddSeconds(1);
using (Utils.ProgressBlock prog = new ProgressBlock("LoadingDatabase", "Loading", 100, 0, true))
{
this.FileStream.Position = DATABASE_CONTENT_OFFSET;
long eof = this.FileStream.Length;
while (this.FileStream.Position < eof)
{
RecordInfo ri = new RecordInfo();
ri.Database = this;
ri.Offset = this.FileStream.Position;
this.FileStream.Position = ri.Offset + RECORD_POS_LENGTH;
ri.Length = BinaryReader.ReadInt64();
this.FileStream.Position = ri.Offset + RECORD_POS_FIELDTYPE;
ri.FieldType = BinaryReader.ReadByte();
if (ri.FieldType == RECORD_EMPTY)
{
_emptyRecords.Add(ri);
_emptyRecordListSorted = false;
}
else
{
this.FileStream.Position = ri.Offset + RECORD_POS_ID;
ri.ID = BinaryReader.ReadString();
ri.SubID = BinaryReader.ReadString();
switch (ri.FieldType)
{
case RECORD_GEOCACHE:
this.GeocacheCollection.Add(new Data.Geocache(ri));
break;
case RECORD_LOG:
this.LogCollection.Add(new Data.Log(ri));
break;
case RECORD_WAYPOINT:
this.WaypointCollection.Add(new Data.Waypoint(ri));
break;
case RECORD_USERWAYPOINT:
this.UserWaypointCollection.Add(new Data.UserWaypoint(ri));
break;
case RECORD_LOGIMAGE:
this.LogImageCollection.Add(new Data.LogImage(ri));
break;
case RECORD_GEOCACHEIMAGE:
this.GeocacheImageCollection.Add(new Data.GeocacheImage(ri));
break;
}
}
this.FileStream.Position = ri.Offset + ri.Length;
ri.OffsetIdx = fsIdx.Position;
ms.Position = 0;
bw.Write(ri.Offset);
bw.Write(ri.Length);
bw.Write(ri.FieldType);
if (ri.FieldType != RECORD_EMPTY)
{
bw.Write(ri.ID);
bw.Write(ri.SubID);
}
else
{
bw.Write("");
bw.Write("");
}
fsIdx.Write(buffer, 0, 117);
if (DateTime.Now >= nextUpdate)
{
if (!prog.Update("Loading", 100, (int)(100.0 * (double)this.FileStream.Position / (double)max)))
{
cancelled = true;
break;
}
nextUpdate = DateTime.Now.AddSeconds(1);
}
}
//if all OK and not canceled
fsIdx.Close();
if (!cancelled)
{
File.Copy(tf.Path, fn);
_fileStreamIdx = File.Open(fn, FileMode.OpenOrCreate, FileAccess.ReadWrite);
Utils.Calculus.SetDistanceAndAngleGeocacheFromLocation(this.GeocacheCollection, ApplicationData.Instance.CenterLocation);
result = true;
}
}
}
}
catch(Exception e)
{
Core.ApplicationData.Instance.Logger.AddLog(this, e);
}
return result;
}
private bool LoadIndexFile(ref bool cancelled)
{
bool result = false;
string fn = string.Concat(FileName, ".gsx");
try
{
//check if file exists
//if not, it will be created during loading of database file
if (File.Exists(fn))
{
_fileStreamIdx = File.Open(fn, FileMode.OpenOrCreate, FileAccess.ReadWrite);
long max = _fileStreamIdx.Length;
DateTime nextUpdate = DateTime.Now.AddSeconds(1);
using (Utils.ProgressBlock prog = new ProgressBlock("LoadingDatabase", "Loading", 100, 0, true))
{
int maxChunks = 1000;
int chunkSize = 117;
byte[] buffer = new byte[maxChunks * chunkSize];
using (MemoryStream ms = new MemoryStream(buffer))
using (BinaryReader br = new BinaryReader(ms))
{
while (_fileStreamIdx.Position < max)
{
long startPos = _fileStreamIdx.Position;
int chunksRead = _fileStreamIdx.Read(buffer, 0, maxChunks * chunkSize) / chunkSize;
for (int i = 0; i < chunksRead; i++)
{
RecordInfo ri = new RecordInfo();
ri.Database = this;
ri.OffsetIdx = startPos + i * chunkSize;
ms.Position = i * chunkSize;
ri.Offset = br.ReadInt64();
ri.Length = br.ReadInt64();
ri.FieldType = br.ReadByte();
if (ri.FieldType != RECORD_EMPTY)
{
ri.ID = br.ReadString();
ri.SubID = br.ReadString();
}
switch (ri.FieldType)
{
case RECORD_EMPTY:
//empty
_emptyRecords.Add(ri);
_emptyRecordListSorted = false;
break;
case RECORD_GEOCACHE:
this.GeocacheCollection.Add(new Data.Geocache(ri));
break;
case RECORD_LOG:
this.LogCollection.Add(new Data.Log(ri));
break;
case RECORD_WAYPOINT:
this.WaypointCollection.Add(new Data.Waypoint(ri));
break;
case RECORD_USERWAYPOINT:
this.UserWaypointCollection.Add(new Data.UserWaypoint(ri));
break;
case RECORD_LOGIMAGE:
this.LogImageCollection.Add(new Data.LogImage(ri));
break;
case RECORD_GEOCACHEIMAGE:
this.GeocacheImageCollection.Add(new Data.GeocacheImage(ri));
break;
}
if (DateTime.Now >= nextUpdate)
{
if (!prog.Update("Loading", 100, (int)(100.0 * (double)_fileStreamIdx.Position / (double)max)))
{
cancelled = true;
break;
}
nextUpdate = DateTime.Now.AddSeconds(1);
}
}
}
if (!cancelled)
{
Utils.Calculus.SetDistanceAndAngleGeocacheFromLocation(GeocacheCollection, Core.ApplicationData.Instance.CenterLocation);
result = true;
}
}
}
}
}
catch(Exception e)
{
Core.ApplicationData.Instance.Logger.AddLog(this, e);
try
{
if (_fileStreamIdx!=null)
{
_fileStreamIdx.Dispose();
_fileStreamIdx = null;
}
File.Delete(fn);
}
catch
{
}
}
return result;
}
private bool LoadDatabaseFile()
{
bool result = false;
try
{
long max = FileStream.Length;
DateTime nextUpdate = DateTime.Now.AddSeconds(1);
using (Utils.ProgressBlock prog = new ProgressBlock("Loading database","Loading...",100,0))
{
byte[] memBuffer = new byte[200];
using (MemoryStream ms = new MemoryStream(memBuffer))
using (BinaryReader br = new BinaryReader(ms))
{
FileStream fs = FileStream;
fs.Position = 0;
long eof = fs.Length;
while (fs.Position < eof)
{
RecordInfo ri = new RecordInfo();
ri.Database = this;
ri.Offset = fs.Position;
fs.Read(memBuffer, 0, 150);
ms.Position = RECORD_POS_LENGTH;
ri.Length = br.ReadInt64();
ms.Position = RECORD_POS_FIELDTYPE;
byte ft = br.ReadByte();
switch (ft)
{
case RECORD_EMPTY:
//empty
_emptyRecords.Add(ri);
_emptyRecordListSorted = false;
break;
case RECORD_GEOCACHE:
ms.Position = RECORD_POS_ID;
ri.ID = br.ReadString();
this.GeocacheCollection.Add(new Data.Geocache(ri));
break;
case RECORD_LOG:
ms.Position = RECORD_POS_ID;
ri.ID = br.ReadString();
this.LogCollection.Add(new Data.Log(ri));
break;
case RECORD_WAYPOINT:
ms.Position = RECORD_POS_ID;
ri.ID = br.ReadString();
this.WaypointCollection.Add(new Data.Waypoint(ri));
break;
case RECORD_USERWAYPOINT:
ms.Position = RECORD_POS_ID;
ri.ID = br.ReadString();
this.UserWaypointCollection.Add(new Data.UserWaypoint(ri));
break;
case RECORD_LOGIMAGE:
ms.Position = RECORD_POS_ID;
ri.ID = br.ReadString();
this.LogImageCollection.Add(new Data.LogImage(ri));
break;
case RECORD_GEOCACHEIMAGE:
ms.Position = RECORD_POS_ID;
ri.ID = br.ReadString();
this.GeocacheImageCollection.Add(new Data.GeocacheImage(ri));
break;
}
fs.Position = ri.Offset + ri.Length;
if (DateTime.Now>=nextUpdate)
{
prog.Update("Loading...", 100, (int)(100.0 * (double)fs.Position / (double)max));
nextUpdate = DateTime.Now.AddSeconds(1);
}
}
}
}
Utils.Calculus.SetDistanceAndAngleGeocacheFromLocation(this.GeocacheCollection, ApplicationData.Instance.CenterLocation);
result = true;
}
catch
{
}
return result;
}
private RecordInfo RequestRecord(string id, byte recordType, byte[] recordData, long minimumLength, long extraBuffer)
{
RecordInfo result = null;
if (!_emptyRecordListSorted)
{
_emptyRecords.Sort(delegate(RecordInfo x, RecordInfo y)
{
return x.Length.CompareTo(y.Length);
});
_emptyRecordListSorted = true;
}
result = (from a in _emptyRecords where a.Length >= minimumLength select a).FirstOrDefault();
if (result == null)
{
result = new RecordInfo();
result.Length = minimumLength + extraBuffer;
result.Offset = FileStream.Length;
result.ID = id;
result.Database = this;
FileStream.SetLength(result.Offset + result.Length);
}
else
{
//re-use of an empty record
result.ID = id;
_emptyRecords.Remove(result);
}
if (result != null)
{
//write record header data
FileStream.Position = result.Offset + RECORD_POS_LENGTH;
BinaryWriter.Write(result.Length);
FileStream.Position = result.Offset + RECORD_POS_FIELDTYPE;
FileStream.WriteByte(recordType);
FileStream.Position = result.Offset + RECORD_POS_ID;
BinaryWriter.Write(result.ID);
//write data
FileStream.Position = result.Offset + 150;
FileStream.Write(recordData, 150, (int)minimumLength - 150);
}
return result;
}
