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Is there any possibilities to convert my string to PUCHAR with out doing looping.
PUCHAR buffer = new UCHAR[length];
As well vice-versa case; meaning convert PUCHAR to String with out doing looping.
Please explain me.
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sivaprakashshanmugam wrote: Is there any possibilities to convert my string to PUCHAR with out doing looping.
PUCHAR buffer = new UCHAR[length];
As well vice-versa case; meaning convert PUCHAR to String with out doing looping.
From PUCHAR to CString...
CString csPUCHAR = buffer;
From CString to PUCHAR...
PUCHAR puCS = (PUCHAR)csPUCHAR.GetBuffer(0);
csPUCHAR.ReleaseBuffer();
Nibu thomas
Software Developer
Programming Tips[^]
-- modified at 2:40 Saturday 20th May, 2006
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Yes the first one works perfectly but it adds some junk character at the end how to remove that;
The second gives conversion error.
Error Message
error C2440: '=' : cannot convert 'ATL::CSimpleStringT<basetype,t_bmfcdll>::PXSTR' to 'PUCHAR'
with
[
BaseType=char,
t_bMFCDLL=true
]
Please provide me solution...
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sivaprakashshanmugam wrote: Yes the first one works perfectly but it adds some junk character at the end how to remove that;
You should terminate the input string by a null char... '\0'
sivaprakashshanmugam wrote: The second gives conversion error.
Error Message
error C2440: '=' : cannot convert 'ATL::CSimpleStringT<basetype,t_bmfcdll>::PXSTR' to 'PUCHAR'
with
[
BaseType=char,
t_bMFCDLL=true
]
Cast it to PUCHAR.
Nibu thomas
Software Developer
Programming Tips[^]
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Nibu thomas wrote: PUCHAR puCS = csPUCHAR.GetBuffer();
PUCHAR puCS = csPUCHAR.GetBuffer();
does this work ??
I think it should be
PUCHAR puCS = csPUCHAR.GetBuffer(csPUCHAR.GetLength());
Hope i am not wrong.
Appu..
"If you judge people, you have no time to love them."
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NiceNaidu wrote: PUCHAR puCS = csPUCHAR.GetBuffer();
does this work ??
No. Sorry. 
NiceNaidu wrote: I think it should be
PUCHAR puCS = csPUCHAR.GetBuffer(csPUCHAR.GetLength());
Hope i am not wrong
No you are not wrong... But no need for csPUCHAR.GetLength(), use 0 instead. We just need a pointer to the internal buffer of CString. I somehow missed out on that.
Nibu thomas
Software Developer
Programming Tips[^]
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Hi,
I have registered mutiple document templates..in an MDI application.I have registered three document templates.When i run the application..a dialog is promting to select one out of the three, then the application main frame and child frame are loaded.I want..to disable this dialog initally when run application,i want to load only main frame.when i click new from menu i want this dialog to appear and prompt to select one out of the three registered templates .Is there any way to do this ..?
Thanks in before
James
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Add the line in red to your code( exactly where it is shown here).
CCommandLineInfo cmdInfo;
ParseCommandLine(cmdInfo);
<code>
cmdInfo.m_nShellCommand = CCommandLineInfo::FileNothing;</code>
if (!ProcessShellCommand(cmdInfo))
return FALSE;
This is what the docs say about CCommandLineInfo::FileNothing...
Turns off the display of a new MDI child window on startup. By design, AppWizard generated MDI applications display a new child window on startup. To turn off this feature, an application can use CCommandLineInfo::FileNothing as the shell command when calling ProcessShellCommand. ProcessShellCommand is called by the InitInstance( ) of all CWinApp derived classes.
Nibu thomas
Software Developer
Programming Tips[^]
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RockyJames wrote: Thank you very much
Thanks for saying thanks...
Nibu thomas
Software Developer
Programming Tips[^]
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How To Trap esc virtual key code for Dailog Based Application?
Fly Like An Eagle With MIGHTY POWER.
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Use PreTranslateMessage()
BOOL MyDialog::PreTranslateMessage(MSG* pMsg)
{
if(pMsg->message==WM_KEYDOWN)
{
if(pMsg->wParam==VK_RETURN || pMsg->wParam==VK_ESCAPE)
pMsg->wParam=NULL ;
}
return CDialog::PreTranslateMessage(pMsg);
}
Somethings seem HARD to do, until we know how to do them.
_AnShUmAn_
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CodeVarma wrote: How To Trap esc virtual key code for Dailog Based Application?
See the following Links for more information.
How to use[^]
Where to use[^]
Knock out 't' from can't,
You can if you think you can
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http://www.codeproject.com/script/comments/forums.asp?msg=1338807&forumid=1647&mode=all&userid=1817418#xx1338807xx
This question has been answered many times i suppose. Also read Michael Dunn's FAQ. It has a lot of good information in it.
Regards,
Rajesh R. Subramanian.
You have an apple and me too. We exchange those and We have an apple each.
You have an idea and me too. We exchange those and We have two ideas each.
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//iocpsever.cpp
#include <winsock2.h>
#include "memorypool.h"
#include <mswsock.h>
using namespace std;
#pragma comment(lib, "ws2_32.lib")
#pragma comment(lib, "Mswsock.lib")
// 但I/O操作数据
typedef struct tagPER_IO_DATA
{
OVERLAPPED Overlapped;
WSABUF DataBuf;
char buffer[1024];
DWORD BufferLen;
int OperationType;
SOCKET Socket;
SOCKADDR_STORAGE ClientAddr;
}PER_IO_DATA, *LPPER_IO_DATA;
#define OP_READ 0
#define OP_WRITE 1
#define OP_ACCEPT 2
particle_allocator<per_io_data> g_per_io_data;
HANDLE g_hAcceptExOverEvent = NULL;
DWORD WINAPI ServerWorkerThread(LPVOID lpParam);
using namespace std;
int main(void)
{
WSADATA wsd;
SYSTEM_INFO SystemInfo;
SOCKADDR_IN InternetAddr;
SOCKET Listen;
WSAStartup(MAKEWORD(2, 2), &wsd);
HANDLE CompletionPort = CreateIoCompletionPort(INVALID_HANDLE_VALUE,
NULL,
0,
0);
GetSystemInfo(&SystemInfo);
for (DWORD i = 0; i < SystemInfo.dwNumberOfProcessors; ++i)
{
HANDLE ThreadHandle;
ThreadHandle = CreateThread(NULL,
0,
ServerWorkerThread,
CompletionPort,
0,
NULL);
CloseHandle(ThreadHandle);
}
Listen = WSASocket(AF_INET,
SOCK_STREAM,
0,
NULL,
0,
WSA_FLAG_OVERLAPPED);
InternetAddr.sin_family = PF_INET;
InternetAddr.sin_port = htons(10000);
InternetAddr.sin_addr.s_addr = htonl(INADDR_ANY);
bind(Listen, (SOCKADDR*)&InternetAddr, sizeof(InternetAddr));
listen(Listen, 5);
if (CreateIoCompletionPort((HANDLE) Listen, CompletionPort, (ULONG_PTR)&Listen, 0) == NULL)
{
printf("CreateIoCompletionPort failed with error %d\n", GetLastError());
return 1;
}
g_hAcceptExOverEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
if(!g_hAcceptExOverEvent)
{
return 1;
}
if(WSAEventSelect(Listen, g_hAcceptExOverEvent, FD_ACCEPT) == SOCKET_ERROR)
{
return 1;
}
SetEvent(g_hAcceptExOverEvent);
BOOL b = TRUE;
while (b)
{
if(WaitForSingleObject(g_hAcceptExOverEvent, INFINITE) == WAIT_FAILED)
continue;
for(int i =0;i<10;i++)
{
PER_IO_DATA * pper_io_data = NULL;
DWORD dwAddrLen = sizeof(sockaddr_in)+16;
pper_io_data = (PER_IO_DATA *)g_per_io_data.alloc_particle();
pper_io_data ->Socket = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP, NULL, 0, WSA_FLAG_OVERLAPPED);
pper_io_data->OperationType = 2;
ZeroMemory(&pper_io_data->Overlapped,sizeof(OVERLAPPED));
if(!AcceptEx(Listen,pper_io_data ->Socket,pper_io_data ->buffer,0,dwAddrLen,dwAddrLen,&pper_io_data ->BufferLen,&pper_io_data->Overlapped))
{
if(WSAGetLastError() != ERROR_IO_PENDING)
{
closesocket(pper_io_data->Socket);
g_per_io_data.free_particle((void*)pper_io_data); //归还结构体到内存池
continue;
}
}
setsockopt( pper_io_data ->Socket, SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT, ( char* )&( Listen ), sizeof( Listen ) );
}
}
CloseHandle(g_hAcceptExOverEvent);
return 0;
}
DWORD WINAPI ServerWorkerThread(LPVOID lpParam)
{
HANDLE CompletionPort = (HANDLE)lpParam;
DWORD BytesTransferred;
LPOVERLAPPED lpOverlapped;
LPPER_IO_DATA poldPerIoData = NULL;
LPPER_IO_DATA pnewPerIoData = NULL;
DWORD RecvBytes;
DWORD Flags;
BOOL bRet = FALSE;
while (1)
{
bRet = GetQueuedCompletionStatus(CompletionPort,
&BytesTransferred,
(PULONG_PTR)
&poldPerIoData,
(LPOVERLAPPED*)
&lpOverlapped,
INFINITE);
if(!bRet)
{
continue;
}
poldPerIoData = (LPPER_IO_DATA)CONTAINING_RECORD(lpOverlapped,
PER_IO_DATA,
Overlapped);
switch (poldPerIoData->OperationType)
{
case OP_ACCEPT:
CreateIoCompletionPort(
(HANDLE)poldPerIoData->Socket,
CompletionPort,
(ULONG_PTR)0,
0);
pnewPerIoData = (LPPER_IO_DATA)g_per_io_data.alloc_particle();
if (!pnewPerIoData)
{
// Error
}
pnewPerIoData->Socket = poldPerIoData->Socket;
pnewPerIoData->OperationType = OP_READ;
ZeroMemory(&(pnewPerIoData->Overlapped), sizeof(OVERLAPPED));
Flags = 0;
pnewPerIoData->DataBuf.len = 1024;
pnewPerIoData->DataBuf.buf = pnewPerIoData->buffer;
pnewPerIoData->OperationType = 0; // read
WSARecv(pnewPerIoData->Socket,
&(pnewPerIoData->DataBuf),
1,
&RecvBytes,
&Flags,
&(poldPerIoData->Overlapped),
NULL);
g_per_io_data.free_particle((void*)poldPerIoData);
break;
case OP_READ:
cout << poldPerIoData->DataBuf.buf << endl;
pnewPerIoData = (LPPER_IO_DATA)g_per_io_data.alloc_particle();
if (!pnewPerIoData)
{
// Error
}
pnewPerIoData->Socket = poldPerIoData->Socket;
pnewPerIoData->OperationType = OP_READ;
ZeroMemory(&(pnewPerIoData->Overlapped), sizeof(OVERLAPPED));
Flags = 0;
pnewPerIoData->DataBuf.len = 1024;
pnewPerIoData->DataBuf.buf = pnewPerIoData->buffer;
pnewPerIoData->OperationType = 0; // read
WSARecv(pnewPerIoData->Socket,
&(pnewPerIoData->DataBuf),
1,
&RecvBytes,
&Flags,
&(poldPerIoData->Overlapped),
NULL);
g_per_io_data.free_particle((void*)poldPerIoData);
break;
case OP_WRITE:
break;
}
}
}
//memorypool.h
#pragma once
#include <iostream>
#include <list>#include <windows.h>
//关键区锁
class CLock
{
CRITICAL_SECTION _crisection;
public:
CLock()
{
InitializeCriticalSection( &_crisection );
}
~CLock()
{
DeleteCriticalSection( &_crisection );
}
void lock()
{
EnterCriticalSection( &_crisection );
}
void unlock()
{
LeaveCriticalSection( &_crisection );
}
};
template <class particle="">
class particle_allocator
{
enum
{
chunk_size =1024
};
typedef unsigned char byte;
struct particle_list
{
byte *_data;
particle_list *_next;
};
std::list<byte *=""> _chunks;
particle_list* _free_list;
CLock _guard;
public:
particle_allocator()
{
_free_list = 0;
_used_particle_number = 0;
_free_particle_number = 0;
}
~particle_allocator()
{
for(std::list<byte *="">::iterator iter = _chunks.begin();iter!=_chunks.end();++iter)
{
delete [] (*iter);
}
while(_free_list)
{
particle_list *temp = _free_list;
_free_list = _free_list->_next;
delete temp;
}
}
particle* alloc_particle()
{
_guard.lock();
byte *momory;
particle_list* ¤t_list = _free_list;
if(!current_list)
{
momory = new byte[chunk_size*sizeof(particle)];
_chunks.push_front(momory);
for(int i =0;i< chunk_size;i++,_free_particle_number++)
{
particle_list *newnode = new particle_list;
newnode->_data = momory + i*sizeof(particle);
newnode->_next = current_list;
current_list = newnode;
}
}
byte *redata;
particle_list *de_node = current_list;
redata = _free_list->_data;
current_list = current_list->_next;
++_used_particle_number;
--_free_particle_number;
delete de_node;
_guard.unlock();
return new(redata) particle;
}
void free_particle(void *p)
{
byte *free_block = reinterpret_cast<byte *="">(p);
_guard.lock();
particle_list* ¤t_list = _free_list;
particle_list *newnode = new particle_list;
newnode->_data = free_block;
newnode->_next = current_list;
current_list = newnode;
--_used_particle_number;
++_free_particle_number;
_guard.unlock();
}
void getallocator()
{
using namespace std;
cout << "_used_particle_number is " << _used_particle_number << " _free_particle_number is "<< _free_particle_number << endl;
}
public:
size_t _used_particle_number;
size_t _free_particle_number;
};
01 is program
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Unless you explain the problem to us how can we help you. 
Reading this code itself is tiresome. Being specific about your problem will help you and us. 
Nibu thomas
Software Developer
Programming Tips[^]
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WSARecv(pnewPerIoData->Socket,
&(pnewPerIoData->DataBuf),
1,
&RecvBytes,
&Flags,
&(poldPerIoData->Overlapped),
NULL);
my program have a spelling mistake.
&(poldPerIoData->Overlapped)
&(pnewPerIoData->Overlapped)
01 is program
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How can I read parallel port for less than 1 miliseconds(about 40 microsecond)with VC++
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Hi
Please try
http://www.codeproject.com/system/AsefPortAccess.asp
KK
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I would like to round a LONG to a multiple of an other LONG. For example: I have got the number 5 and i would like to round it up to a multiple of 3. I wrote the following code to do this:
lCurrent=((lMinimum+(lIncrement-1))/lIncrement)*lIncrement;
In this piece of code lMinimum is de value that gets rounded up. And lIncrement is the value to wich lMinimum is rounded up. So if we choose the numbers mentioned above we get 6. This works fine for positive numbers but when we choose a negative number for lMinimum it goes wrong. I wrote another piece of code to handle negative numbers
lCurrent=abs(lMinimum%lIncrement)+lMinimum;
So combining the two we get:
if(lMinimum>=0)
{
lCurrent=((lMinimum+(lIncrement-1))/lIncrement)*lIncrement;
}
else
{
lCurrent=abs(lMinimum%lIncrement)+lMinimum;
}
This is the obvious way and it contains one conditional branch. I was wondering of someone came accros a bit twiddling hack to do this more efficient.
Thanks
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Remco Hoogenboezem wrote: I have got the number 5 and i would like to round it up to a multiple of 3.
From the example you suggested...
LONG round = 5 - ( 5 % 3 );
LONG round = ( 5 + 3 ) - (( 5 + 3 ) % 3 ); This should round it...
All 5's and 3's should be replaced by variable names...
You should replace 5 + 3 with another variable name so it will look good.
Nibu thomas
Software Developer
Programming Tips
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Remco Hoogenboezem wrote: I would like to round a LONG to a multiple of an other LONG. For example: I have got the number 5 and i would like to round it up to a multiple of 3
Funny but it works
Suppose your number is 5 and round it with multiple of 3
LONG iNum=5;
LONG iMultipleof=3;
LONG iResult;
iResult=(iNum/iMultipleof)*iMultipleof; Try it! But it works for less rounding
Knock out 't' from can't,
You can if you think you can
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The end objective is to save a file to disk with data from a linked list. First this function converts the data already in the list into a buffer (string), which is sent along with the filename to another function (not listed here) so that the buffer is written to file. The problem is where I try to set the temporary variables which store the fields in the linked list so that they can be concatinated together into individual lines...to be later concatinated into the buffer (a c++ string). I'm getting this error 4 times from the compiler:
error C2110: '+' cannot add two pointers
The function with the problem:
<br />
void WeaveList::SaveToFile(string FileName)<br />
{<br />
NodePtr currPtr = head;
bool WriteSucceeded = false;<br />
string WeaveLine1,<br />
WeaveLine2,<br />
WeaveLine3,<br />
WeaveLine4,<br />
Buffer,<br />
tempWeaveName,<br />
tempExampleSizes;<br />
double tempARMin,<br />
tempARMax = 0.0;<br />
int tempNumRings = 0;<br />
<br />
cout<<"Writing data to buffer..."<<endl;<br />
if(!IsEmpty())<br />
{<br />
while(currPtr != NULL)<br />
{<br />
tempARMin = currPtr->AR_Range_Min;<br />
tempARMax = currPtr->AR_Range_Max;<br />
tempNumRings = currPtr->NumRingsUsed;<br />
tempWeaveName = currPtr->WeaveName;<br />
tempExampleSizes = currPtr->ExampleSizes;<br />
<br />
WeaveLine1 = "Weave AR Range: " + "/t/t" + tempARMin + " - " + tempARMax;<br />
WeaveLine2 = "Number of Rings Used:" + "/t/t" + tempNumRings;<br />
WeaveLine3 = "Weave Name:" + "/t/t/t" + "!" + tempWeaveName;<br />
WeaveLine4 = "Example Ring Sizes:" + "/t/t" + "!" + tempExampleSizes;<br />
Buffer = Buffer + WeaveLine1 + "/n" + WeaveLine2 + "/n" + WeaveLine3 + "/n" + WeaveLine4;<br />
if(currPtr->link != NULL)<br />
Buffer = Buffer + "/n/n";<br />
currPtr = currPtr->link;
}<br />
}<br />
else<br />
Buffer = "";<br />
WriteSucceeded = SaveListToFile(FileName, Buffer);
if(WriteSucceeded)<br />
cout<<"SUCCESS!"<<endl;<br />
else<br />
cout<<"F***! Unable to write to file."<<endl;
I'm doing this totally on my own without an instructor to pester with questions, so any help would be appreciated. I can post the rest of the file if anyone wants, but it's kind of long.
-- modified at 15:53 Friday 19th May, 2006
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