C / C++ / MFC

Richard MacCutchan4-Dec-11 22:47

4-Dec-11 22:47

I have also tried as many ways that I could to "fix" some sample code to reproduce the error, but have not been able to, nor can I find any examples via Google. Are you using the standard Microsoft DDK, and which version of the compiler are you using?

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Richard MacCutchan5-Dec-11 6:07

5-Dec-11 6:07

I discovered, by chance, that it can be caused by something like:

C++

int RtlZeroMemory;

RtlZeroMemory(&query_table[0],sizeof(query_table));

because RtlZeroMemory has been defined somewhere as something that is not a function. So you need to track backwards through your source and header files to the definition of RtlZeroMemory, and resolve why it is doing this.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Erudite_Eric5-Dec-11 6:23

5-Dec-11 6:23

Using a DDK set compiler I doubt doing this would compile since it would give a duplicate definition error.

--edit--

Oddly it doesn't complain for int RtlZeroMemory, it compiles OK (I guess because it is a #define) however int memset does not compile due to a duplicate deffition error.

So, means he is not using a DDK compiler and build macro by the looks of it, but some other compiler, or doing something else odd in his code.

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

Nothing to say.

modified 5-Dec-11 13:04pm.

Richard MacCutchan5-Dec-11 7:12

5-Dec-11 7:12

Erudite_Eric wrote:
or doing something else odd in his code.

I think that's a given, I'm just trying to find out what.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

vishalgpt13-Dec-11 17:00

vishalgpt

13-Dec-11 17:00

Firstly sorry for late reply,

It was really a very strange error, or one can call it a bug.

I just uninstalled the visual studio express ide and re-installed it. After that RtlZeroMemory error had gone. I guess some exception or bug had occured in the ide or compiler or god knows.

Thank you all, for sharing your precious time with me.

Regards,
Vishal

Erudite_Eric4-Dec-11 20:59

4-Dec-11 20:59

Richard MacCutchan wrote:
let's hope one of the driver experts sees this question tomorrow

I am here. Smile | :)

See my reply...

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

Nothing to say.

trotwa4-Dec-11 1:25

trotwa

4-Dec-11 1:25

Mmmh, this should be fine.

For testing use also:
RTL_QUERY_REGISTRY_TABLE query_table[2] = {0};

IS this the correct line, where the error comes from ???
Maybe it is:
Table[0].QueryRoutine = &XQueryRoutine;

And XQueryRoutine is wrong defined ?

Software_Developer4-Dec-11 8:54

Software_Developer

4-Dec-11 8:54

Is it the same "Driver code to read registry and set up Win32 symbolic link" found [here?]

Richard Andrew x644-Dec-11 9:30

Richard Andrew x64

4-Dec-11 9:30

What is the exact error code of that error? I would like to read the definition of the error.

The difficult we do right away...
...the impossible takes slightly longer.

Addy Tas4-Dec-11 10:00

Addy Tas

4-Dec-11 10:00

Hi,

Just from reading it appears to be ok, i'll try to compile the same later tomorrow. Meanwhile; what do you get if you comment the line that is giving the issue?
Which ddk / wdk are you using?

Cheers, AT

Cogito ergo sum

Erudite_Eric4-Dec-11 20:55

4-Dec-11 20:55

vishalgpt wrote:
RtlZeroMemory

Why are you using kernel functions?

In user mode uses memset().

So, what is the address of your memory? Well, with arrays it is the array name, so query_table. How long is your memory? Well, it is twice the type, so sizeof(RTL_QUERY_REGISTRY_TABLE) * 2.

So, call:

memset(quary_table, 0, sizeof(RTL_QUERY_REGISTRY_TABLE) * 2);

Remember, think memory address, think size. Smile | :)

--edit--
OK, so you are writing a driver...

You really should understand memory (and the C language) better than this before you write drivers because you are going to be in a world of pain, and anyone who gets your driver on their system is too.

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

Nothing to say.

modified 5-Dec-11 6:30am.

Erudite_Eric5-Dec-11 6:43

5-Dec-11 6:43

How are you building this, wtith a source file and the DDk build macro?

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

Nothing to say.

Array Problem.

janaswamy uday2-Dec-11 17:28

janaswamy uday

2-Dec-11 17:28

Hi all

I am having two Arrays with different Length. I have some elements in both Array's In Ascending Order. Also Note that
this Elements are always in Ascending Order.

Example
-------
char array1[200];
char array2[100];

Now both arrays have some elements

array1[0]= "1";
array1[1]= "1.1";
array1[2]= "2";
array1[3]= "2.1";

array2[0]= "1";
array2[1]= "1.1";
array2[2]= "1.2";
array2[3]= "2";
array2[4]= "3";
array2[5]= "3.1";
array2[6]= "3.2";

Now i have to Arrange this Two Arrays such that.

Array1 Elements should be
-------------------------
array1[0]= "1";
array1[1]= "1.1";
array1[2]= ""; //Empty as element array2 contain element
array1[3]= "2"
array1[4]= "2.1"
array1[5]= "" //Empty as element array2 contain element
array1[6]= ""
array1[7]= ""
Array2 Elements should be
-------------------------
array2[0]= "1"
array2[1]= "1.1"
array2[2]= "1.2"
array2[3]= "2"
array2[4]= "" //Empty as element array1 contain element
array2[5]= "3"
array2[6]= "3.1"
array2[7]= "3.2"
-------------------------

How can i replace a Blank if any one Array Element have no Element at that Index.

Help me out.

Thanks,
Uday.

«_Superman_»2-Dec-11 18:22

«_Superman_»

2-Dec-11 18:22

From the source and destination arrays you provided and your explanation, I do not understand what you're trying to do.
Could you rephrase your question or maybe another example would help.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Richard MacCutchan2-Dec-11 23:14

2-Dec-11 23:14

The first thing you need to fix is your definitions of the arrays. You have defined both arrays as char and are then saying that each element holds a pointer to a string so your definition needs to be char*. To get the results you want, you first need to sort both arrays in order. Next create a third array (array3) containing all the elements of each array, but only 1 copy of duplicate elements (i.e. a merge of array1 and array2). Now iterate the elements of array3 and put empty strings in any elements which do not exist in array1. Repeat this process for array2 and you should end up with array3 and array4 containing what you want. There is most likely a simpler way to do this but I can't think of one off the top of my head.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

janaswamy uday3-Dec-11 0:18

janaswamy uday

3-Dec-11 0:18

Thank you Richard for giving me the Idea. Thank You Very Much.

Richard MacCutchan3-Dec-11 0:25

3-Dec-11 0:25

Happy to help; don't forget to mark answer as accepted.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Addy Tas4-Dec-11 10:08

Addy Tas

4-Dec-11 10:08

Hi,

If you'd you std::vector<double> you could just insert a item where needed.
Use a for loop on array two, where an item does not exits in array one, add it.

My two cents, AT

Cogito ergo sum

getline

jkirkerx2-Dec-11 11:21

image processing toolkits | batch image processing

2-Dec-11 11:21

I can't seem to get the getline, to read a line of text from an open file.
I loaded these .h references

#include "stdafx.h"
#include <stdlib.h>
#include <stdio.h>

#include <atlstr.h>
#include <string.h>
#include <tchar.h>

#pragma warning(disable:4786)
#include <iostream>
#include <fstream>
#include <string>

#include <Commctrl.h>
#include <Windows.h>

// Load the SQL Server Commands
    std::ofstream sqlDBFile;
    sqlDBFile.open (szFilePath);

    // if the file stream opened
    if (sqlDBFile.is_open() ) {

        // While file stream is in memory
        while (sqlDBFile.good() ) {
            // Make a temp sql command buffer
            WCHAR pzSQLCommand[512];

            while (sqlDBFile.good() ) {
                // read the line of text
                WCHAR *szTempLine = NULL;
                getline(sqlDBFile, &szTempLine, '\n');

                // if text != GO, add to buffer
                if ((wcsncmp( szTempLine, L"GO", wcslen(L"GO") )) == 0) {
                    break;
                }
                else {
                    // if text = GO, terminate the buffer and execute the buffered command
                    wcsncat_s(pzSQLCommand, wcslen(pzSQLCommand), szTempLine, wcslen(szTempLine) );
                    pzSQLCommand[wcslen(pzSQLCommand) + 1] = L'\0';
                    hr = pICommandText->SetCommandText( DBGUID_DBSQL, pzSQLCommand );
                    hr = pICommandText->QueryInterface( IID_ICommandProperties, ( void ** ) &pICommandProperties );
                    hr = pICommandText->Execute( NULL, IID_IRowset, NULL, &cRowsAffected, ( IUnknown ** ) &pIRowset );

                }
            }
        }

        // close the sql command file
        sqlDBFile.close();
    }

Re: getline

C^hris L^osinger2-Dec-11 11:45

C^hris L^osinger

2-Dec-11 11:45

does this compile?

this doesn't seem right:

C++

WCHAR *szTempLine = NULL;

the docs i see say getline takes a ref to a std::string as the string param, not a WCHAR ptr.

maybe:

C++

wstring str;
getline(sqlDBFile, str, '\n');

Re: getline

jkirkerx2-Dec-11 12:19

I'm stuck, not sure which direction to go

2-Dec-11 12:19

I saw that too. I think there are 2 of them, 1 in string, and 1 in istream, and that the sample I found on c++ website was in mistake of it's use. I'm using fstream, and it does not exist in that header.

hmmmmmmmmmm

jkirkerx2-Dec-11 19:16

Re: I'm stuck, not sure which direction to go

2-Dec-11 19:16

I got the getline to work, but I can't figure out how to advance to the next line.

And even if I can get to the next line, I can't figure out how to build the buffer with sql command text until I reach GO. Sure like that stringbuilder in asp.net.

The wifstream was suppose to return the unicode chars from the file, but I get ansi chars.

I'm close here, just need lots of refinement.

Any ideas are welcomed.

// Load the SQL Server Commands
    std::wifstream *sqlDBFile = new std::wifstream;
    sqlDBFile->open(szFilePath);

    // if the file stream opened
    if (sqlDBFile->is_open() ) {

        // While file stream is in memory
        while (sqlDBFile->good() ) {
            // Make a temp sql command buffer
            WCHAR *pzSQLCommand = new WCHAR[1024];

            while (sqlDBFile->good() ) {
                // read the line of text
                WCHAR szAnsiBuffer[1024];
                sqlDBFile->getline(szAnsiBuffer, 1024, L'\n');

                int jdx = 0;
                WCHAR *szBufferLine = new WCHAR[1024];
                for (int i = 2; i < 1024; ++i) {
                    szBufferLine[jdx] = szAnsiBuffer[i];
                    i++;
                    jdx++;
                }
                int iLength = wcslen(szBufferLine);
                szBufferLine[iLength] = L'\0';

                // if text != GO, add to buffer
                if ((wcsncmp( szBufferLine, L"GO", wcslen(L"GO") )) != 0) {
                    wcsncat_s(pzSQLCommand, wcslen(pzSQLCommand), szBufferLine, wcslen(szBufferLine) );

                    pzSQLCommand[wcslen(pzSQLCommand) + 1] = L'\0';
                    break;
                }
                else {
                    // if text = GO, terminate the buffer and execute the buffered command
                    hr = pICommandText->SetCommandText( DBGUID_DBSQL, pzSQLCommand );
                    hr = pICommandText->QueryInterface( IID_ICommandProperties, ( void ** ) &pICommandProperties );
                    hr = pICommandText->Execute( NULL, IID_IRowset, NULL, &cRowsAffected, ( IUnknown ** ) &pIRowset );

                }
            }
        }

Richard MacCutchan3-Dec-11 0:03

Re: I'm stuck, not sure which direction to go

3-Dec-11 0:03

C++

// read the line of text
WCHAR szAnsiBuffer[1024];
sqlDBFile->getline(szAnsiBuffer, 1024, L'\n');

int jdx = 0;
WCHAR *szBufferLine = new WCHAR[1024];
for (int i = 2; i < 1024; ++i) {
    szBufferLine[jdx] = szAnsiBuffer[i];
    i++;
    jdx++;
}
int iLength = wcslen(szBufferLine);
szBufferLine[iLength] = L'\0';

I'm not sure what you are trying to do here but most of this code is redundant. You have defined your input buffer as WCHAR so the resulting line will be Unicode, There is no need (in fact it's quite dangerous) for the copying character by character. All you need is:

C++

// read the line of text
WCHAR szBufferLine[1024];
sqlDBFile->getline(szBufferLine, 1024, L'\n');

This will leave you with a null terminated array of Unicode characters in szBufferLine, which you can then test, for the L"GO" string, and append to your command.

A couple of other things that you should also do:

1. When you create the pzSQLCommand buffer, is to add a null at the beginning so your wcsncat_s() calls do not trash your memory, thus:

C++

WCHAR *pzSQLCommand = new WCHAR[1024];
*pzSQLCommand = L'\0';

2. Use the proper length setting of your destination buffer (see here[^]) in your wcsncat_s() call thus:

C++

wcsncat_s(pzSQLCommand, 1024, szBufferLine, wcslen(szBufferLine) );

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

jkirkerx3-Dec-11 8:00