Re: unicode equivalent of Readfile() function.. - C / C++ / MFC Discussion Boards

Re: adding an item into control panel context menu

«_Superman_»15-Jul-09 2:04

15-Jul-09 2:04

All control panel items are actually DLL files that end with a .CPL extension.
To add a menu item to its context menu, you need to create a shell extension.
Look at this tutorial here - The Complete Idiot's Guide to Writing Shell Extensions - Part I[^]

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

unicode equivalent of Readfile() function..

Rakesh514-Jul-09 22:42

Rakesh5

14-Jul-09 22:42

Hi,

I am making my application unicode supporting one. i face a problem like this now :

i have got some content in *.inf file..

i am unable to read the content of the file using Readfile(..) function.

code snippet:
-----start-------------
TCHAR * inifilecontents;
HANDLE hFile = CreateFile( iniFilePath,GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);

if (hFile != INVALID_HANDLE_VALUE)
{
DWORD nfile_Size = GetFileSize(hFile, NULL);
if (nfile_size != INVALID_FILE_SIZE)
{
m_nBufferSize = nFileSize + 1;
iniFileContents = new TCHAR[m_nBufferSize];
ZeroMemory(m_pIniFileContents, m_nBufferSize);
DWORD bytestoread = nFileSize;
DWORD bytesread = 0;
-----> BOOL bReadSucceeded = ReadFile(hFile,inifileContents,bytestoread,bytesread,NULL);

----------End---------------------
after executing readfile funcion, inifilecontents are showing contents as "some small BOXES" and not the exact content of inf file....
please guide me on this...

Thanks,
Rakesh

Re: unicode equivalent of Readfile() function..

Naveen14-Jul-09 22:55

Naveen

14-Jul-09 22:55

May be because your inf file isn't in unicode format. If so you have to read the content as char* itself and then convert it to unicode string using MultiByteToWideChar() function.

nave

[OpenedFileFinder] [My Blog]

Re: unicode equivalent of Readfile() function..

Rajesh R Subramanian14-Jul-09 22:57

Rajesh R Subramanian

14-Jul-09 22:57

Are you sure that you're compiling for Unicode?

It is a crappy thing, but it's life -^ Carlo Pallini

Re: unicode equivalent of Readfile() function..

Rakesh514-Jul-09 23:36

Rakesh5

14-Jul-09 23:36

Actually i dont have unicode content in the file as of now. but still its not showing even the ASCII content of the file..

when i tried CPallini' suggestion, it showed message box with boxes...

( that was the same thing as i tried earlier..)

Can u enlighten me what can i do for this?

Thanks,
Rakesh

Re: unicode equivalent of Readfile() function.. [modified]

Rajesh R Subramanian14-Jul-09 23:52

Rajesh R Subramanian

14-Jul-09 23:52

Well, what do you mean it's not "showing". Where are you trying to show it? An edit control? The debugger watch window? How exactly are you verifying the value of the buffer read?

BTW, this is pointless: m_nBufferSize = nFileSize + 1; Instead of 1, you must choose sizeof(TCHAR) if you want really neutral code.

[Added] Why are you reading a .inf file with ReadFile()?! WTF | :WTF:

Shouldn't be using the GetPrivateProfileString()[^] and other similar functions designed for this purpose?

It is a crappy thing, but it's life -^ Carlo Pallini

modified on Wednesday, July 15, 2009 5:58 AM

Re: unicode equivalent of Readfile() function..

CPallini14-Jul-09 23:09

CPallini

14-Jul-09 23:09

Rakesh5 wrote:
after executing readfile funcion, inifilecontents are showing contents as "some small BOXES" and not the exact content of inf file....

Actually that's the exact file content. Try to show it with, for instance

MessageBoxW(NULL, (LPCWSTR) inifilecontents, L"TEST", MB_OK);

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: unicode equivalent of Readfile() function..

Nishad S15-Jul-09 0:38

Nishad S

15-Jul-09 0:38

In short, using the ReadFile, will read the file content as bytes. Neither as unicode nor as MBCS, but simply as binary data. It is our concern whether it should be treated as unicode or not.

I am ignoring the inconsistency of the variables in your sample code. But still I found a mistake in your code.

That is you are allocating the buffer as 'new TCHAR[m_nBufferSize]'. It is wrong since the GetFileSize will return the exact size of the file in number of bytes. So when you are compiling with unicode enabled, the size of the TCHAR will be 2 (means sizeof unsigned short) and the buffer allocated will be twice of what we needed. Also it should be noted that the data read will not be directly converted to unicode (even if the buffer is of TCHAR).

And, from your question I understand that your file will be in unicode format. If this is true, then you can read it as follows. (modifications might be necessary)

int nSize = GetFileSize(...);
byte* pBytes = new byte[nSize];
ReadFile(..., pBytes, ...); // now the content of the file is in the buffer
MessageBox(.., LPCTSTR(pBytes), ... ); // you should make the buffer string null terminating if needed

This is the case when your file is in binary format.

When you save a file as unicode using notepad, you can see the first two bytes will be FF FE. So when you reading the file you can check that for ensuring the file is unicode and can ignore those bytes from using as data.

Suppose the content of a unicode file is 'abcd', then the binary equalent will be FF FE 61 00 62 00 63 00 64 00. You can see this when you open a file as binary in the VC editor itself.

I hope my explanation is clear for you.

(By the way, I am not sure about any APIs which will directly read a unicode file)

- ns ami -

what is IWshRuntimeLibrary?

V K 214-Jul-09 22:03

V K 2

14-Jul-09 22:03

what is IWshRuntimeLibrary? when can it be used.

Re: what is IWshRuntimeLibrary?

CPallini14-Jul-09 22:13

CPallini

14-Jul-09 22:13

May I politely google that for you [^]?
Big Grin | :-D

toolbar controls

Member 59031014-Jul-09 21:29

Member 590310

14-Jul-09 21:29

I have created an SDI application andi want to add two buttons to it for zoom in and zoom out.how can i do that?

Re: toolbar controls

_AnsHUMAN_ 14-Jul-09 21:38

_AnsHUMAN_

14-Jul-09 21:38

You want the buttons to be added to the toolbar. Right?

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Re: toolbar controls

Stuart Dootson14-Jul-09 21:45

Stuart Dootson

14-Jul-09 21:45

Open the toolbar in the toolbar editor (double-click on the toolbar in the Resource View) and click on the blank button on the right side of the toolbar to create a new button. Type a suitable ID into the toolbar button's Properties view (something like ID_VIEW_ZOOMIN?). Now draw something on that to represent 'zoom-in' (a magnifying glass with a + usually works). Now repeat (but changing the details as appropriate) for the zoom-out button.

Now you can handle the zoom-in and zoom-out events, probably in your View class.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: toolbar controls

Member 59031014-Jul-09 23:58

Member 590310

14-Jul-09 23:58

thanks a lot

How to read command line arguments in vc++

KASR114-Jul-09 21:11

KASR1

14-Jul-09 21:11

How to read command line args in vc++.
Is there any predefined function/class available?

Re: How to read command line arguments in vc++

_AnsHUMAN_ 14-Jul-09 21:31

_AnsHUMAN_

14-Jul-09 21:31

What type of application are you working on?
If it's a simple console based application you can read the information in the main function (usually named as argc and argv).

Also you can see here:Reading Command line arguments[^]

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Re: How to read command line arguments in vc++

Rajesh R Subramanian14-Jul-09 21:32

Rajesh R Subramanian

14-Jul-09 21:32

...and if you're using MFC, see m_lpCmdLine, which is a member of CWinApp.

It is a crappy thing, but it's life -^ Carlo Pallini

Re: How to read command line arguments in vc++

CPallini14-Jul-09 21:39

CPallini

14-Jul-09 21:39

Command line arguments are available in the main function of your program (that is WinMain for a GUI application). If you're using MFC, your-CWinApp-derived class provides the m_lpCmdLine [^] member.
Smile | :)

Re: How to read command line arguments in vc++

KASR114-Jul-09 22:24

KASR1

14-Jul-09 22:24

Thanks for the information.

Re: How to read command line arguments in vc++

Member 392263915-Jul-09 2:25

Member 3922639

15-Jul-09 2:25

GetCommandLine ?

help in modifying a code?[SOLVED]

jon ray14-Jul-09 18:04

jon ray

14-Jul-09 18:04

the code below create a folder in drive E:\ called autorun.inf and other line to create inside autorun.inf folder a text file called protection.txt

now what i want is instead of creating these things in drive E:\ i want the user to enter the drive letter that he wants then these files will be created in the entered drive

#include <direct.h>
#include <fstream>
#include <iostream>

using namespace std;
int main()
{
	_mkdir("e:/autorun.inf");
	ofstream output("e:\\autorun.inf\\protection.txt",ios::out);
	output.close();
	return 0;
}

Thanks in advance

Re: help in modifying a code?

chandu00414-Jul-09 18:09

chandu004

14-Jul-09 18:09

whats the problem in achieving it?
accept the drive letter from user,
form a string that has to be passed to _mkdir, and pass it.
first try it, and then post here if you have any problem. we will definitely help you.

--------------------------------------------
Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.

Re: help in modifying a code?

carter200014-Jul-09 18:28

carter2000

14-Jul-09 18:28

Hi .
Is this what you want?

#include <direct.h>
#include <fstream>
#include <iostream>

using namespace std;

int main()
{	
    char root;
    char path[64];
    cin >> root;
    sprintf_s(path, "%c:/autorun.inf", root);
    _mkdir(path);	
    sprintf_s(path, "%s/protection.txt", path);
    ofstream output(path,ios::out);	
    output.close();	
    return 0;
}

Re: help in modifying a code?

jon ray14-Jul-09 18:46

jon ray

14-Jul-09 18:46

thank you very much this exactly what i want

but if u do not mind i want to ask u some questions about the code that u wrote

#include <direct.h>
#include <fstream>
#include <iostream>

using namespace std;

int main()
{	
    char root;
    char path[64]; //why did u declare path as char and set it to 64
    cin >> root;
    sprintf_s(path, "%c:/autorun.inf", root); //what does this thing mean (%c)
    _mkdir(path);	
    sprintf_s(path, "%s/protection.txt", path); //why did u put two (path) and why did u put here %s instead of %c
    ofstream output(path,ios::out);	
    output.close();	
    return 0;
}

again thank u very much

Re: help in modifying a code?

carter200014-Jul-09 18:59

carter2000

14-Jul-09 18:59

I'm a chinese, my English may be hard to read, I'm sorry for that. But i will try to explain it.

jon ray wrote:
char path[64]; //why did u declare path as char and set it to 64

64 isn't a regular number, I got it by counting the length of your longest full path "e:\\autorun.inf\\protection.txt", and just pick a number more than it.

jon ray wrote:
sprintf_s(path, "%c:/autorun.inf", root); //what does this thing mean (%c)

%c is mean that it's a character but not others(string), and it's value is determined by 'root'

jon ray wrote:
sprintf_s(path, "%s/protection.txt", path); //why did u put two (path) and why did u put here %s instead of %c

%s is mean that it's a string, and it's value is determined by 'path'.
the second 'path' is use to replace the '%s', and then put the result "%s/protection.txt" to the first 'path', now 'path' has become the full path what you want.

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