internal object ReadData(Database db, BinaryReader br)
{
const string FuncErrCode=ClassErrCode+".0006";
try
{
// // dec
// BinaryReader oldbw = bw;
// MemoryStream ms = new MemoryStream();
// bw = new BinaryWriter(ms);
// // dec
Field f = this;
switch(f.type)
{
case FieldType.ftBoolean:
return br.ReadBoolean();
case FieldType.ftDecimal:
return br.ReadDecimal();
case FieldType.ftDateTime:
return new DateTime(br.ReadInt64());
case FieldType.ftInt32:
return br.ReadInt32();
case FieldType.ftInt64:
return br.ReadInt64();
case FieldType.ftString: //long total = 2*len+8 bytes
long p = br.BaseStream.Position;
byte[] bytes = new byte[br.ReadInt32()];
bytes=br.ReadBytes(bytes.Length);
string str =System.Text.Encoding.Unicode.GetString(bytes);
br.BaseStream.Position = p+DataSize();
return str;
default:
return null;
}
// // dec
// bw = oldbw;
// long seed = bw.BaseStream.Position;
// byte[] bytes2 = ms.ToArray();
// for(int n=0;n<bytes2.Length;n++)
// {
// int pos = ((n%7)*((n+3)%103)) % bytes2.Length;
// bytes2[n] = (byte)(((int)bytes2[n]) ^ ((int)db.passwd[n]));
// }
// bw.Write(bytes2);
// // dec
}
catch(Exception ex)
{
throw new Exception(ex.Message+"\n"+FuncErrCode+": Inner exception.");
}
}
internal void WriteIndexData(Database db, BinaryWriter bw)
{
const string FuncErrCode=ClassErrCode+".0002";
try
{
lock(db.TableBlocking)
{
bw.Write(bUnique);
if(bUnique)
{
bw.Write((int)this.ht.Keys.Count);
foreach(object key in this.ht.Keys)
{
Variant v = Variant.Object2Variant(key);
v.WriteToFieldDef(bw,false);
long rowid = (long)this.ht[key];
bw.Write(rowid);
}
}
else
{
bw.Write((int)this.ht.Keys.Count);
foreach(object key in this.ht.Keys)
{
Variant v = Variant.Object2Variant(key);
v.WriteToFieldDef(bw,false);
ArrayList al = this.ht[key] as ArrayList;
bw.Write((int)al.Count);
foreach(long rowid in al)
bw.Write(rowid);
}
}
}
}
catch(Exception ex)
{
throw new Exception(ex.Message+"\n"+FuncErrCode+": Inner exception.");
}
}
internal void WriteData(Database db, BinaryWriter bw, Variant v, bool bCommit)
{
const string FuncErrCode=ClassErrCode+".0005";
try
{
// // enc
// BinaryWriter oldbw = bw;
// MemoryStream ms = new MemoryStream();
// bw = new BinaryWriter(ms);
// // enc
object obj = v.obj;
if(v.type!=type)
throw new Exception(FuncErrCode+": Different types.");
Field f = this;
switch(f.type)
{
case FieldType.ftBoolean:
bw.Write((bool)obj);
break;
case FieldType.ftDecimal:
bw.Write((decimal)obj);
break;
case FieldType.ftDateTime:
bw.Write(((DateTime)obj).Ticks);
break;
case FieldType.ftInt32:
bw.Write((int)obj);
break;
case FieldType.ftInt64:
bw.Write((long)obj);
break;
case FieldType.ftString: //long total = 2*len+8 bytes
string str = (string)obj;
if(str.Length>f.len) str=str.Substring(0,f.len);
byte[] bytes = System.Text.Encoding.Unicode.GetBytes(str);
byte[] padding = new byte[(2*f.len+8)-bytes.Length];
bw.Write((int)bytes.Length);
bw.Write(bytes);
bw.Write(padding);
break;
}
// // enc
// bw = oldbw;
// long seed = bw.BaseStream.Position;
// byte[] bytes2 = ms.ToArray();
// for(int n=0;n<bytes2.Length;n++)
// {
// int pos = ((n%7)*((n+3)%103)) % bytes2.Length;
// bytes2[n] = (byte)(((int)bytes2[n]) ^ ((int)db.passwd[n]));
// }
// bw.Write(bytes2);
// // enc
if(bCommit)
bw.Flush();
}
catch(Exception ex)
{
throw new Exception(ex.Message+"\n"+FuncErrCode+": Inner exception.");
}
}
internal static Index ReadIndexData(Database db, BinaryReader br)
{
const string FuncErrCode=ClassErrCode+".0001";
try
{
lock(db.TableBlocking)
{
Index ndx = new Index();
ndx.bUnique = br.ReadBoolean();
if(ndx.bUnique)
{
int nkeys = br.ReadInt32();
for(int k=0;k<nkeys;k++)
{
Variant v = Variant.ReadFromFieldDef(br);
ndx.ht[v.obj]=br.ReadInt64();
}
}
else
{
int nkeys = br.ReadInt32();
for(int k=0;k<nkeys;k++)
{
Variant v = Variant.ReadFromFieldDef(br);
ndx.ht[v.obj] = new ArrayList();
int values = br.ReadInt32();
for(int vl=0;vl<values;vl++)
{
long rowid=br.ReadInt64();
(ndx.ht[v.obj] as ArrayList).Add(rowid);
}
}
}
return ndx;
}
}
catch(Exception ex)
{
throw new Exception(ex.Message+"\n"+FuncErrCode+": Inner exception.");
}
}
