C / C++ / MFC

21-Feb-07 0:34

Hello,

I have the following situation:

Input is char *buf (which is the content of a web page).

I have the following code

char v; <br />
for (i=0; i<strlen(buf); i++)<br />
   {<br />
 	 v = buf[i]; <br />
   }

I get a negative v if the page has Greek characters I get negative values for v. Something like v=-50. Is there any method to get the character behind -50 ?

Thanks.

James R. Twine21-Feb-07 1:21

James R. Twine

21-Feb-07 1:21

   Sounds like you should be scraping the content of the page as Unicode (wide chars, wchar_t) instead of ANSI (narrow chars, char).

   The standard ASCII table, which you are really using like-it-or-not when dealing with char types, does not have a lot of extended characters in it, and the ones it has can be treated differently by different systems. For example, -50 is 0xCE, which can be Î or ╬, or some other character...

   Peace!

-=- James
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micutzu21-Feb-07 1:28

21-Feb-07 1:28

Thanks for the reply. The whole application is developed around ANSI and changing everyting looks like not such a good idea. I was wandering if there is any mechanism to determine the “real character” behind -50. If I know that the real character is a greek character I can convert it into a html entity for example and I can get something like %u03C.

Naveen21-Feb-07 2:13

21-Feb-07 2:13

I dont know you checked my post or not...but this will work..isnt it?

CString cstext = L"03C5";
wchar_t Greek;
int nChar;
swscanf( cstext, L"%x", &nChar );
Greek = nChar;

nave

micutzu21-Feb-07 2:32

21-Feb-07 2:32

I did . Thanks.
I do not use CString (not using MFC). Your solution works but I am trying to find a way to determine if there is a possible to find our which Greek character is assigned to -50 (if there is such a possibility).

Naveen21-Feb-07 2:43

21-Feb-07 2:43

why cant you try printing it out to console..?

wprintf( L"%c", pGreek );

nave

micutzu21-Feb-07 3:00

21-Feb-07 3:00

I did.

printf("%c\n", c);
wprintf( L"%c", c );

Both print the same character which is not the correct one ┼ (this is printed instead of Π)

Naveen21-Feb-07 16:14

21-Feb-07 16:14

micutzu wrote:
wprintf( L"%c", c );

if 'c' is of type wchar_t then you must specify like this.

wprintf( L"%c", &c );

nave

Nemanja Trifunovic21-Feb-07 4:00

Nemanja Trifunovic

21-Feb-07 4:00

micutzu wrote:
but I am trying to find a way to determine if there is a possible to find our which Greek character is assigned to -50 (if there is such a possibility).

That entirely depends on the text encoding. Which charset is the webpage you are working with? If it is Windows CP 1253 (Greek), you can find out by setting the codepage of your console window to 1253 and then printing it out. For -50 (ie 206 in unsigned form) it should be greek capital XI: Ξ

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utf8-cpp

toxcct21-Feb-07 2:33

toxcct

21-Feb-07 2:33

Naveen R wrote:
CString cstext = L"03C5";

naveen, be careful, write this :

CStringW cstext = L"03C5";

CString cstext = _T("03C5");

but don't mix the two styles.
apparently, you're using wide characters in all the rest of your code, so i'd say use the former...

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Naveen21-Feb-07 2:45

21-Feb-07 2:45

but CString have both constructors

CString(LPCWSTR lpsz)
CString(LPCSTR lpsz)

Any way I did so because he said( in his previous post) his project is UNICODE define...

nave

toxcct21-Feb-07 2:52

toxcct

21-Feb-07 2:52

Naveen R wrote:
but CString have both constructors

this is not acceptable argument, because, if the application is not defining UNICODE macro, even if you initialize your CString with a LPCWSTR, the string will be casted into ANSI string.

BTW, i doubt of this information. actually, CString gets a LPCTSTR, which is transformed into LPCSTR or LPCWSTR depending on unicode definition

Naveen R wrote:
Any way I did so because he said( in his previous post) his project is UNICODE define...

yes, but then prefer using CStringW. imagine the case when someone else has to maintain the application, or develop the dual possibility of having the application running both ansi and unicode... your code must be flexible, not only "aware"

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Naveen21-Feb-07 16:08

21-Feb-07 16:08

toxcct wrote:
if the application is not defining UNICODE macro, even if you initialize your CString with a LPCWSTR, the string will be casted into ANSI string.

Even if UNICODE is defined, I am expecting only ANSI characters in that statement.

toxcct wrote:
yes, but then prefer using CStringW

Whats is this CStringW? I didnt find any such class in vc6. I havent worked in later verions of visual studio. Is it a new class added to the MFC in later verions of visual studio?

nave

kakan21-Feb-07 1:41

kakan

21-Feb-07 1:41

char is a signed data type.

You have to use unsigned char in order to get the character values above 127 (decimal) right, such as:

unsigned char v; 
for (i=0; i {
  v = (unsigned char) buf[i]; 
}

There is a compiler option (/J ?) that defaults char to be unsigned.

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How to make a combo box readonly?

Nemanja Trifunovic21-Feb-07 1:58

Nemanja Trifunovic

21-Feb-07 1:58

If you just want char to be unsigned, set the compiler option /J.

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utf8-cpp

reza matinnejad21-Feb-07 0:10

reza matinnejad

21-Feb-07 0:10

How could i make a Combo box readonly(user can not write in the combo box) in design time? How could i make a Combo box readonly(user can not write in the combo box) in run time?

Garth J Lancaster21-Feb-07 0:17

Garth J Lancaster

21-Feb-07 0:17

you obviously didnt search/look around CP very hard .. try this http://www.codeproject.com/combobox/readonlycombo.asp[^]

reza matinnejad21-Feb-07 0:21

reza matinnejad

21-Feb-07 0:21

Thanks

David Crow21-Feb-07 3:25

David Crow

21-Feb-07 3:25

reza matinnejad wrote:
How could i make a Combo box readonly(user can not write in the combo box) in design time?

By using the WS_DISABLED style.

reza matinnejad wrote:
How could i make a Combo box readonly(user can not write in the combo box) in run time?

By calling EnableWindow(FALSE).

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