Doubt in CStdio File

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Hi all,

i have doubt in CStdio File i have text in file i.e

REPTVW_PRJ_ID_BID_REPORT_OPEN_IN_WORD="Open in Word™"

its reading everyhting fine expect ™

its raeding like REPTVW_PRJ_ID_BID_REPORT_OPEN_IN_WORD="Open in Word"

trade mark is not reading from the file

what might be the problem please let me know

Posted 20-May-15 19:49pm

imran.prdc

Updated 20-May-15 20:24pm

v2

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Jochen Arndt 21-May-15 3:00am

What is the encoding of the text file?
Especially what hex code is used for the TM character?
You can check this with a hex editor or by reading the file in binary mode into a buffer.
CStdioFile supports only ANSI files. See also the tip http://www.codeproject.com/Tips/465194/Read-and-Write-Text-Files-in-Unicode-through-CStdi

[no name] 21-May-15 3:09am

thi is ansi file not uniocde file .... but in uniocode version

[no name] 21-May-15 3:11am

tried but same output

Richard MacCutchan 21-May-15 3:56am

Use your debugger to see what is getting stored in memory for that character. It is most likely that your code is reading it, but your program is not displaying it correctly.

[no name] 21-May-15 4:06am

if (!fileIn.Open(_T("D:\\CVEnglish.lex"), CFile::modeNoTruncate | CFile::modeRead, &ex))
{
ex.ReportError();
return ;
}
// CStdioFile fileIn(_T("D:\\CVEnglish.lex"),CFile::modeRead);

CString sRead;
fileIn.ReadString(sRead);
fileIn.Close();

[no name] 21-May-15 4:06am

it is simple code same thing is wrking in debug or realease mode but not in uniocde how ?

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Jochen Arndt · Answer 1 · 2015-05-20T23:28:00

Solution 1

I have tested it and there is only a problem with Unicode builds.

The reason is that ReadString uses fgetws which calls mbtowc which uses the current locale for character conversion. When the locale is not set by your program it defaults to the C locale which only supports ASCII. So you must set the locale once upon program start:

setlocale(LC_ALL, "English");

See also the MSDN setlocale[^] page.

[EDIT]
To set the locale to the ANSI code page actually used by Windows use:

setlocale(LC_ALL, ".ACP");

Posted 20-May-15 23:28pm

Jochen Arndt

Updated 20-May-15 23:42pm

v2

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[no name] 21-May-15 5:33am

it will affect for other languages ?

Jochen Arndt 21-May-15 5:38am

It will affect how specific functions handle locale settings (see https://msdn.microsoft.com/en-us/library/wyzd2bce.aspx for the functions).
You may call setlocale again if you need other settings. I will update my answer with a general setting according to the used Windows code page.

[no name] 21-May-15 5:40am

yes please let me know ?

Jochen Arndt 21-May-15 5:45am

You should use the Reply button right of a comment to answer. Then that poster will get a mail notification.

I don't know which code page is used in India (or on your system). If that does not contain the TM symbol, using ".ACP" might not work. But using "English" with your file works.

[no name] 21-May-15 5:53am

ok then for other language japanase it will affect ?

Jochen Arndt 21-May-15 5:59am

You must be more specific about the effect.

ANSI code pages have only a subset of characters. ASCCI characters are covered by all. But specific charcters like the TM symbol might not be present. When you want to read an ANSI file, you must know the code page that has been used to create the file and take this into account when reading the file and converting it to Unicode. In your case with CStdioFile you must then call setlocale() before reading the file. Because there is no direct relation from locales to code pages, it might be better to use other methods like reading the file in raw mode and using MultiByteToWideChar to convert the content to Unicode.

[no name] 21-May-15 6:02am

raw mode means ?

Jochen Arndt 21-May-15 6:17am

Raw mode: Reading the file content in binary mode to an allocated buffer. E.g:

FILE *f = fopen(fileName, "rb");
char * buf = new char[file_size+1];
fread(buf, 1, file_size, f);
buf[file_size] = 0;
fclose(f);

[no name] 21-May-15 6:51am

but u cannot decalre so much size .. file size is to high buffer size will be high

Jochen Arndt 21-May-15 7:04am

With fileIn.ReadString(sRead) the Unicode CString will occupy twice the size. When file_size is an int, the above can be used with up to MAX_INT-1 characters (2 GB) which is the same amount that a CString can hold.

But this going out of the scope of the question. Your question was:
"what might be the problem please let me know"

The answer is:
You did not select the locale with Unicode builds.
The solution is:
Select the matching locale by calling setlocale() before reading the file.

[no name] 21-May-15 7:41am

OK THANKS