Re: MD5 Alg - C / C++ / MFC Discussion Boards

Re: PathRemoveFileSpec function removes the last part even if it's not a file ?!

David Crow4-Jun-08 7:23

David Crow

4-Jun-08 7:23

sashoalm wrote:
...even though it should remove the trailing file name only if it really is a file.

Says who?

Why not call PathIsDirectory() before calling PathRemoveFileSpec()?

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: PathRemoveFileSpec function removes the last part even if it's not a file ?!

Simon Baldry4-Aug-11 4:59

Simon Baldry

4-Aug-11 4:59

I am sure this behaviour is "by design". Finding out if a path refers to a file or a directory is "very" expensive as it requires at least one and probably multiple disk reads. Simply scanning the string and stripping off the text after the final directory separator is likely to be 100's of times faster.

Vista specific CToolBar problem

Manu.Dev4-Jun-08 5:01

Manu.Dev

4-Jun-08 5:01

Hi All,
I have an old vc++ application which was running perfectly fine on Win NT and Win XP. (I use VC++ 7 to build it)
Now i am running it on Vista.
While opening one perticular view it throws an unhandelled exception and simply dies.
After debugging I found that the exception is being thrown when i try to add buttons to my dynamic tool bar.

The code structure is :
There is a CDynamicToolBar derived from CToolBar
class CDynamicToolBar : public CToolBar
When I need to instantiates the dynamic tool bar i do something like this

//call my constructor
 m_wndToolBar = new CDynamicToolBar (/*reqd parameters*/)
//call create function
 if (!m_wndToolBar->CreateEx(this))
   {//handel error }
//call my function to load all buttons, bitmaps, etc.
 m_wndToolBar->Load();
 //continue

Its in the Load() ,where I add the buttons array
I am getting the exception in Vista while there is no problem in XP

GetToolBarCtrl().AddButtons(iButtonCount+iSeptratorCount, pAToolBarButton);

I have tried removing the code related to the tool bar and running the view without it on Vista.
It gives no problem at all (except,i don't get the toolbar of course)

I am completely at loss here...
Anyone with ideas /suggestion/ Big Grin | :-D

solutions

only dead fish swim with the stream

Re: Vista specific CToolBar problem

Manu.Dev6-Jun-08 4:36

Manu.Dev

6-Jun-08 4:36

what! no replies! Poke tongue | ;-P

Anyway the problem is solved.
in the line

GetToolBarCtrl().AddButtons(iButtonCount+iSeptratorCount, pAToolBarButton);

pAToolBarButton is an array of TBBUTTON structure where each structure represents a button on the tool bar.
It seems that each field in TBBUTTON structure must be properly initialized in Vista. Well this is a good programming practice anyway.

But in case you have left the less used fields like TBBUTTON.dwValue uninitialized, it would ignored when you application runs on XP.
Where as in Vista you get an exception when you try to add the buttons to your toolbar control.

only dead fish swim with the stream

MD5 Alg

Nandu_77b4-Jun-08 4:40

Nandu_77b

4-Jun-08 4:40

Can any one of you help me how to implement a MD5 algorithm in C++

Thanks
Nandu

Re: MD5 Alg

David Crow4-Jun-08 4:50

David Crow

4-Jun-08 4:50

Surely you jest:

I could do this if I only had a search engine

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: MD5 Alg

Randor 4-Jun-08 4:56

Randor

4-Jun-08 4:56

RFC-1321 describes the MD5 steps and includes the original reference implmentation.

http://www.rfc.net/rfc1321.html[^]

I assume you want to do this for educational purposes. Otherwise it would be better to use Microsoft cryptographic service providers.

Best Wishes,
-David Delaune

Re: MD5 Alg

Nandu_77b4-Jun-08 7:29

Nandu_77b

4-Jun-08 7:29

Thanks for your prompt reply.

-Nandu

Re: MD5 Alg

Hamid_RT4-Jun-08 21:21

Hamid_RT

4-Jun-08 21:21

See Implementing the MD5 Algorithm[^].

Re: MD5 Alg

Nandu_77b4-Jun-08 22:18

Nandu_77b

4-Jun-08 22:18

With the above link i am able to ecoding, but can any help me to decoding it.

Thanks
-Nandu

Re: MD5 Alg

JudyL_MD5-Jun-08 3:33

JudyL_MD

5-Jun-08 3:33

Nandu_77b wrote:
any help me to decoding it

MD5 is a hash, it only goes from plain-text to hashed data. It does not go the other way. If you want to go back and forth, you need to look at cryptography, not hashing.

Judy

Is there any Win32 API to get users home directory

Nandu_77b4-Jun-08 4:23

Nandu_77b

4-Jun-08 4:23

HI
Any can help me, to get the users home directory in windows. Is there any win32 API avilable for it?

Home directory means ::C:\Documents and Settings\<userid>

Please help with possible ways to get this thro program.

Thanks,
Nandu

Re: Is there any Win32 API to get users home directory

Nandu_77b4-Jun-08 4:25

Nandu_77b

4-Jun-08 4:25

Home dir:C:\Documents and Settings\userid

Re: Is there any Win32 API to get users home directory

JudyL_MD4-Jun-08 4:37

JudyL_MD

4-Jun-08 4:37

SHGetSpecialFolderPath[^]

Re: Is there any Win32 API to get users home directory

krmed4-Jun-08 6:55

krmed

4-Jun-08 6:55

You could also use GetEnvironmentVariable:

TCHAR tcDirName[_MAX_PATH];
GetEnvironmentVariable(_T("userprofile"), tcDirName, _MAX_PATH);

This environment variable is set when the user logs on.

Note that it is not always on the same drive as the system (C Smile | :)

.

Hope that helps.

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

Re: Is there any Win32 API to get users home directory

Nandu_77b4-Jun-08 7:28

Nandu_77b

4-Jun-08 7:28

Thanks for your reply, is there any specific win32 API who will do this job. As i need to use this in win32 API programming, not in MFC or higher framwork.

-Nandu

Re: Is there any Win32 API to get users home directory

krmed4-Jun-08 8:02

krmed

4-Jun-08 8:02

That is Win32 API call.

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

Re: Is there any Win32 API to get users home directory [modified]

Nibu babu thomas4-Jun-08 17:44

Nibu babu thomas

4-Jun-08 17:44

Nandu_77b wrote:
is there any specific win32 API who will do this job

Yes, use

GetUserProfileDirectory - retrieves the path to the root directory of the specified user's profile.

For e.g. C:\Documents and Settings\Nibu

A function which uses ths API to return current process user home dir...

#include "Userenv.h"
#pragma comment(lib, "userenv.lib")
CString GetUserHomeDir()
{
   TCHAR szHomeDirBuf[MAX_PATH] = { 0 };
   
   HANDLE hToken = 0;
   VERIFY( OpenProcessToken( GetCurrentProcess(), TOKEN_QUERY, &hToken ));
   
   DWORD BufSize = MAX_PATH;
   VERIFY( GetUserProfileDirectory( hToken, szHomeDirBuf, &BufSize ));
   
   CloseHandle( hToken );
   return CString( szHomeDirBuf );
}

Then there are other functions too which might interest you, like...

GetAllUsersProfileDirectory
GetDefaultUserProfileDirectory
GetProfilesDirectory

Look up these in MSDN for more information.

Nibu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http://nibuthomas.wordpress.com

modified on Wednesday, June 4, 2008 11:55 PM

Re: Is there any Win32 API to get users home directory [modified]

Member 85340355-Jan-17 6:07

Member 8534035

5-Jan-17 6:07

Is the given code correct?

I am wondering about the return instruction, in which a CString object is created:

return CString( szHomeDirBuf );

In my opinion this object will be already destroyed while the function returns.
When accessing from caller, the object is already invalid.

CString res = GetUserHomeDir();

Am I wrong?

How To Get Default Getway IP

Dabara4-Jun-08 4:08

Dabara

4-Jun-08 4:08

Hi

How to get User's gateway IP using VC++ ?.

Is there any VC++ API to find the IE Version ?.

Thanks in advance.

Prabhat Singh

Re: How To Get Default Getway IP

David Crow4-Jun-08 4:47

David Crow

4-Jun-08 4:47

Use GetAdaptersInfo().

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

COM Basics

Aseem Sharma4-Jun-08 3:49

Aseem Sharma

4-Jun-08 3:49

Can somebody tell me the best book to start with COM&ATL Stuff?

Re: COM Basics

led mike4-Jun-08 4:21

led mike

4-Jun-08 4:21