1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47 | Program TestStream;
uses classes;
Var Stream : TMemoryStream; S,T : String;
begin
S:='ABCDEFGHIJKLMNOPQRSTUVWXYZ';
T:=S; Writeln ('Creating stream.');
Stream:=TMemoryStream.Create;
Writeln ('Initial Size : ',Stream.Size);
Writeln ('Initial Position : ',Stream.Position);
Writeln ('Setting new size to 100'); Stream.Size:=100;
Writeln ('New Size : ',Stream.Size);
Writeln ('new Position : ',Stream.Position);
Stream.WriteByte (1);
Stream.WriteWord (2); Stream.WriteDWord (3);
Stream.WriteBuffer (S[1],Length(S));
Writeln ('Size after write : ',Stream.Size);
Writeln ('Position after write : ',Stream.Position);
Writeln ('Truncating size'); Stream.Size:=Stream.Position;
Writeln ('Stream Size is : ',Stream.Size);
Writeln ('Stream Position : ',Stream.Position);
Writeln ('Seek to position 0 : ', Stream.Seek(0,soFromBeginning));
Writeln ('new Position : ',Stream.Position); If Stream.ReadByte<>1 then Writeln ('First byte not 1');
If Stream.ReadWord<>2 then Writeln ('First word not 2');
If Stream.ReadDWord<>3 then Writeln ('First Word not 3');
If Stream.Read(T[1],Length(S))<>Length(S) then Writeln ('Couldn''t read string.');
Stream.WriteByte (1); Stream.WriteWord (2);
Stream.WriteDWord (3);
Stream.WriteBuffer (S[1],Length(S));
Writeln ('Stream Size is : ',Stream.Size);
Stream.SaveToFile('Test2.dat'); Stream.Free;
end.
$Log: mstream.pp,v $
Revision 1.4 2005/02/14 17:13:18 peter
* truncate log
} |