Re: buffer

From:

Carl Forsman <fatwallet951@yahoo.com>

Newsgroups:

comp.lang.c++

Date:

Fri, 23 Jan 2009 16:49:56 -0800

Message-ID:

<abpkn4565hsfmqtokmpt6g721ih1k8t6uv@4ax.com>

On Fri, 23 Jan 2009 18:33:57 -0600, Paavo Helde
<paavo@nospam.please.ee> wrote:

Carl Forsman <fatwallet951@yahoo.com> kirjutas:

how can i create a temp buffer to store the latest data (a string ID)?

it will update every 1 sec, and hold the most updated 50 string ID and
delete the old data.

something like -

=======most updated ========
EF
AB
EF
AB
EF
EF
EF
AB

... 50 more IDs following
======= old data ========

the old data get deleted ... if buffer of 50 items are full

Maybe:

std::deque<std::string> buffer;

buffer.push_back(next_id);
if (buffer.size()>50) {
buffer.pop_front();
}

hth
Paavo

why when i declare the var, i got error like this

error C2039: 'deque' : is not a member of 'std'
error C2143: syntax error : missing ';' before '<'
error C4430: missing type specifier - int assumed. Note: C++ does not
support default-int
error C2238: unexpected token(s) preceding ';'

===========================

class Sock : public CSocketComm
{
public:
    Sock();
    ~Sock();

    void Create1(CVirtualScreen *Vscreen, CString port);
    virtual void OnDataReceived(const LPBYTE lpBuffer, DWORD
dwCount);
    virtual void OnEvent(UINT uEvent);
    bool StartServer();

    CVirtualScreen *Vscreen;
    CString Vport;
    bool socketOn;
    std::deque<std::string> buffer;