/// <summary>
/// [R1 is deprecated use R2] Fixes unfinished writes in a previous table grow
/// </summary>
/// <param name="TableName"></param>
/// <param name="f"></param>
unsafe internal void CheckTable_FixContent(string TableName, Field f)
{
const string FuncErrCode=ClassErrCode+".0013";
try
{
lock(this.TableBlocking)
{
if(!this.TableBlocking.Contains(TableName))
this.TableBlocking[TableName] = new SortedList();// index cache
}
lock(this.TableBlocking[TableName])
{
// Check content
if(true)
{
FileStream fs = FileStream2.NewFileStream(System.IO.Path.GetDirectoryName(DatabaseFilePath)+"\\"+TableName+".hc"+f.seq.ToString(),FileMode.Open,FileAccess.ReadWrite,FileShare.None);
BinaryReader br = new BinaryReader(fs);
bool flag = br.ReadBoolean();
if(flag)
//if(true)
{
HFI hfi = HFI.Read(TableName,DatabaseFilePath);
long supposedLen = (f.DataSize()*hfi.rowseq)+sizeof(bool);
long offset=fs.Length-supposedLen;
if(fs.Length<supposedLen)
{
// Recovering corrupt data
long start = (fs.Length-sizeof(bool))/f.DataSize();
fs.Position=start*f.DataSize()+sizeof(bool);
BinaryWriter bw = new BinaryWriter(fs);
for(long n=start;n<hfi.rowseq;n++)
{
f.WriteDefaultData(bw,false);
}
bw.Flush();
bw.BaseStream.Position=0;
bw.Write((bool)false); // edition flag
bw.Flush();
// Destroy the index
if(f.bIndexed)
{
(TableBlocking[TableName] as SortedList)[f.seq]=null;
SetDirtyIndexInDisc(TableName,f);
}
try
{
LogToFile("Warning","Recovering unfinished column.'"+TableName+"' by "+offset.ToString()+" bytes");
}
catch
{
}
}
}
fs.Flush();
fs.Close();
}
}
}
catch(Exception ex)
{
throw new Exception(ex.Message+"\n"+FuncErrCode+": Inner exception.");
}
}
/// <summary>
/// [R1 is deprecated use R2] Adds a table
/// </summary>
public void AddField(string TableName, Field f)
{
const string FuncErrCode=ClassErrCode+".0010";
try
{
lock(this.TableBlocking)
{
string[] tblnames;
GetTableNames(out tblnames);
if(!new ArrayList(tblnames).Contains(TableName))
throw new Exception("HyperNetDatabase error: Table not present.");
// set entry
if(!this.TableBlocking.Contains(TableName))
this.TableBlocking[TableName] = new SortedList();
}
lock(this.TableBlocking[TableName])
{
string tbl = TableName;
QueryCacheDestroy(TableName);
Field[] flds = GetFields(TableName);
foreach(Field i in flds)
{
if(f.Name==i.Name)
throw new Exception("HyperNetDatabase error: Column already present.");
}
FieldsCache[TableName]=null; // cancel Field Cache
long fatid,rownum,fseq;
HFI hfi = HFI.Read(tbl,DatabaseFilePath);
fatid = hfi.fatid;
rownum = hfi.rowseq;
// gets new field seq
fseq = hfi.fieldseq;
hfi.fieldseq++;
hfi.Write(tbl,DatabaseFilePath);
fatid = (fatid + 1) % 2;
if(true)// Fat
{
// Create fat file
FileStream fs = FileStream2.NewFileStream(System.IO.Path.GetDirectoryName(DatabaseFilePath)+"\\"+tbl+".hf"+fatid.ToString(),FileMode.Create,FileAccess.Write,FileShare.None);
BinaryWriter bw = new BinaryWriter(fs,System.Text.Encoding.UTF8);
bw.Write(magic);
bw.Write((long)(flds.Length+1));
for(int n=0;n<flds.Length;n++)
flds[n].Write(bw);
f.seq=fseq;
f.Write(bw);
bw.Flush();
bw.Close();
// try
// {
//
// string fileName = System.IO.Path.GetDirectoryName(DatabaseFilePath)+"\\"+tbl+".hf"+((fatid + 1) % 2).ToString();
//// FileStream2.CloseHandle(fileName);
// File.Delete(fileName);
// }
// catch
// {
// }
// Create column data
fs = FileStream2.NewFileStream(System.IO.Path.GetDirectoryName(DatabaseFilePath)+"\\"+tbl+".hc"+fseq.ToString(),FileMode.Create,FileAccess.Write,FileShare.None);
bw = new BinaryWriter(fs,System.Text.Encoding.UTF8);
bw.Write((bool)true); // edition flag
bw.Flush();
for(int n=0;n<rownum;n++)
{
f.WriteDefaultData(bw,false);
}
bw.Flush();
bw.BaseStream.Position=0;
bw.Write((bool)false); // edition flag
bw.Flush();
bw.Close();
// Change fat pointer
hfi.fatid=fatid;
hfi.Write(tbl,DatabaseFilePath);
}
}
}
catch(Exception ex)
{
throw new Exception(ex.Message+"\n"+FuncErrCode+": Inner exception.");
}
}