replacing ReadBuffer in Indy10

[Dennis Cote]

I am porting an application from Indy 9 to Indy 10.

In Indy 9 I had code to read data into a dynamically allocated char
buffer using ReadBuffer.

char* Buffer;
int Length;

...
ReadBuffer(Buffer, Length);
...

I have found that I need to do the following instead in Indy 10.

char* Buffer;
int Length;

...
TIdBytes byteBuf;
byteBuf.Length = Length;
IOHandler->ReadBytes(byteBuf, Length);
BytesToRaw(byteBuf, Buffer, Length);
...

My question is, is there a way to get Indy 10 to read directly into the
existing char buffer? I would like to avoid the extra allocations and
the buffer copy if possible.

TIA
Dennis Cote

[Remy Lebeau (TeamB)]

"Dennis Cote" <denni...@gmail.com> wrote in message
news:47e28ff7$1...@newsgroups.borland.com...

> is there a way to get Indy 10 to read directly into the existing char
> buffer?

Indy does not support direct memory buffers anymore, by design. One thing
you can do, though, is derive a new class from TCustomMemoryStream that uses
the char* buffer as its underlying memory block. You could then use
ReadStream() to receive the data directly into the buffer. For example:

class TBufferStream : public TCustomMemoryStream
{
public:
__fastcall TBufferStream(void *Buffer, int Length)
: TCustomMemoryStream()
{
SetPointer(Buffer, Length);
}

int __fastcall Write(void *Buffer, int Count)
{
Count = min(Count, Size-Position);
if( Count > 0 )
{
memcpy(((LPBYTE)Memory) + Position, Buffer, Count);
Seek(Count, soFromCurrent);
return Count;
}
return 0;
}
};

char* Buffer;
int Length;
...

TBufferStream *strm = new TBufferStream(Buffer, Length);
IOHandler->ReadStream(strm, Length);
delete strm;

Gambit

[Colin B Maharaj]

What you can also probably do, as I did using indy 9
(sorry I do not use indy 10 yet) is get the socket handle
similar to this...
int isocket = AThread->Connection->Socket->Binding->Handle;
and do this....
unsigned char * s = new unsigned char [8200];
int r = recv(isocket, s, 8192, 0);
if r == 0 then do this.....
AThread->Connection->Disconnect();
and terminate else if
r == -1
this is an error so go look up WSAGetLastError();
and if r > 0 then you got data in s and r is the
length!

[Remy Lebeau (TeamB)]

"Colin B Maharaj" <nor...@myhost.com> wrote in message
news:47e5a1fb$1...@newsgroups.borland.com...

> What you can also probably do, as I did using indy 9
> (sorry I do not use indy 10 yet) is get the socket handle
> similar to this...

You shouldn't be doing that. That completely bypasses Indy's ability to
manage and track the socket state.

Gambit