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Thanks Jerry.
__ __
From: owner-xsi@(protected) [mailto:owner-xsi@(protected)] On Behalf Of
Jerry Gamache
Sent: Friday, June 11, 2004 3:40 AM
To: XSI@(protected)
Subject: RE: C++ question
This seems like too much code. This can probably be simplified to:
// string buffers
char charString[1024];
// convert CString to char
wcstombs( charString, myCString.GetWideString(), 1024 );
And prevents a potential buffer overflow crash in swprintf if the string
happens to be longer than 1024 characters.
If you really want the intermediate buffer, at least use _snwprintf instead of
swprintf.
http://www.dwheeler.com/secure-programs/Secure-Programs-HOWTO/buffer-overflow
.html
-- --Original Message-- --
From: owner-xsi@(protected) [mailto:owner-xsi@(protected)]On Behalf Of
Alain Laferrière
Posted At: Thursday, June 10, 2004 12:31 PM
Posted To: xsi
Conversation: C++ question
Subject: RE: C++ question
Example ( myCString is the CString which gets converted to char string ) :
// string buffers
char charString[1024];
wchar_t wcharString[1024];
// convert CString to char
swprintf( wcharString, L"%s", myCString.GetWideString() );
wcstombs( charString, wcharString, 1024 );
__ __
From: owner-xsi@(protected) [mailto:owner-xsi@(protected)] On Behalf Of
François Painchaud
Sent: Thursday, June 10, 2004 11:53 PM
To: XSI List
Subject: Re: C++ question
CString stores wide characters. Use CString method "const wchar_t*
GetWideString() const", then use "FILE* _wfopen( const wchar_t* filename, const
wchar_t* mode )" or a similar open function. You could also take a look at
function "int wctomb( char* mbchar, wchar_t wchar )".
François
-- ----- Message d'origine -- -----
Sujet: C++ question
Date: Thu, 10 Jun 2004 15:58:11 +0200
De: "Helge Mathee" <helge.mathee@(protected)> <mailto:helge.mathee@(protected)>
A: <XSI@(protected)> <mailto:XSI@(protected)>
Maybe I am dumb.....
how to convert a CString to a const char *?
I need this to read files inside of a c++ operator...
really weird... just doesn't work...
thanks,
helge
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<DIV dir=ltr align=left><SPAN class=413501919-10062004><FONT face=Arial
color=#000080 size=2>Thanks Jerry.</FONT></SPAN></DIV><BR>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
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<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> owner-xsi@(protected)
[mailto:owner-xsi@(protected)] <B>On Behalf Of </B>Jerry
Gamache<BR><B>Sent:</B> Friday, June 11, 2004 3:40 AM<BR><B>To:</B>
XSI@(protected)<BR><B>Subject:</B> RE: C++ question<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV><SPAN class=093351318-10062004><FONT face="Comic Sans MS" color=#008080
size=2>This seems like too much code. This can probably be simplified
to:</FONT></SPAN></DIV>
<DIV><SPAN class=093351318-10062004><FONT face="Comic Sans MS" color=#008080
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=093351318-10062004><FONT face="Comic Sans MS" color=#008080
size=2>
<DIV dir=ltr align=left><FONT face=Arial color=#000080 size=2> //
string buffers <BR> char <SPAN
class=157212616-10062004> charString</SPAN>[1024
];<BR></FONT></DIV>
<DIV><FONT face=Arial color=#000080 size=2></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#000080 size=2> //
convert CS<SPAN class=157212616-10062004>t</SPAN>ring to char<BR>
wcstombs( charString, <SPAN class=157212616-10062004>my</SPAN><SPAN
class=157212616-10062004>CString</SPAN>.GetWideString(), 1024
);<BR></FONT></DIV></FONT></SPAN></DIV>
<DIV><SPAN class=093351318-10062004><FONT face="Comic Sans MS" color=#008080
size=2>And prevents a potential buffer overflow crash in swprintf if the
string happens to be longer than 1024 characters.</FONT></SPAN></DIV>
<DIV><SPAN class=093351318-10062004><FONT face="Comic Sans MS" color=#008080
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=093351318-10062004><FONT face="Comic Sans MS" color=#008080
size=2>If you really want the intermediate buffer, at least use _snwprintf
instead of swprintf.</FONT></SPAN></DIV>
<DIV><SPAN class=093351318-10062004><FONT face="Comic Sans MS" color=#008080
size=2><A
href="http://www.dwheeler.com/secure-programs/Secure-Programs-HOWTO/buffer
-overflow.html">http://www.dwheeler.com/secure-programs/Secure-Programs-HOWTO
/buffer-overflow.html</A></FONT></SPAN></DIV>
<DIV><SPAN class=093351318-10062004><FONT face="Comic Sans MS" color=#008080
size=2></FONT></SPAN> </DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-- --Original Message-- --<BR><B>From:</B> owner-xsi@(protected)
[mailto:owner-xsi@(protected)]<B>On Behalf Of </B>Alain
Laferrière<BR><B>Posted At:</B> Thursday, June 10, 2004 12:31
PM<BR><B>Posted To:</B> xsi<BR><B>Conversation:</B> C++
question<BR><B>Subject:</B> RE: C++ question<BR><BR></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#000080
size=2></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#000080 size=2><SPAN
class=157212616-10062004>Example ( <SPAN
class=157212616-10062004>my</SPAN><SPAN class=157212616-10062004>CString is
the CString which gets converted to char string )
:</SPAN></SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#000080 size=2><SPAN
class=157212616-10062004></SPAN></FONT><FONT face=Arial color=#000080
size=2><SPAN class=157212616-10062004></SPAN></FONT><FONT face=Arial
color=#000080 size=2><SPAN class=157212616-10062004></SPAN></FONT><FONT
face=Arial color=#000080 size=2></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#000080 size=2>
// string buffers <BR> char <SPAN
class=157212616-10062004> charString</SPAN>
[1024];<BR><SPAN
class=157212616-10062004> </SPAN>wchar_t <SPAN
class=157212616-10062004>
wcharString</SPAN>[1024];</FONT></DIV>
<DIV><FONT face=Arial color=#000080 size=2></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#000080 size=2>
// convert CS<SPAN class=157212616-10062004>t</SPAN>ring to
char<BR> swprintf( <SPAN
class=157212616-10062004>wcharString</SPAN>, L"%s", <SPAN
class=157212616-10062004>my</SPAN><SPAN
class=157212616-10062004>CString</SPAN>.GetWideString() );<BR>
wcstombs( charString, wcharString, 1024 );<BR></FONT></DIV><BR>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> owner-xsi@(protected)
[mailto:owner-xsi@(protected)] <B>On Behalf Of </B>François
Painchaud<BR><B>Sent:</B> Thursday, June 10, 2004 11:53 PM<BR><B>To:</B>
XSI List<BR><B>Subject:</B> Re: C++ question<BR></FONT><BR></DIV>
<DIV></DIV>CString stores wide characters. Use CString method "const
wchar_t* GetWideString() const", then use "FILE* _wfopen( const wchar_t*
filename, const wchar_t* mode )" or a similar open function. You could
also take a look at function "int wctomb( char* mbchar, wchar_t wchar
)".<BR><BR>François<BR> <BR>-- ----- Message d'origine -- -----
<TABLE cellSpacing=0 cellPadding=0 border=0>
<TBODY>
<TR>
<TH vAlign=baseline noWrap align=right>Sujet: </TH>
<TD>C++ question</TD></TR>
<TR>
<TH vAlign=baseline noWrap align=right>Date: </TH>
<TD>Thu, 10 Jun 2004 15:58:11 +0200</TD></TR>
<TR>
<TH vAlign=baseline noWrap align=right>De: </TH>
<TD>"Helge Mathee" <A class=moz-txt-link-rfc2396E
href="mailto:helge.mathee@(protected)"><helge.mathee@(protected)></A>
</TD></TR>
<TR>
<TH vAlign=baseline noWrap align=right>A: </TH>
<TD><A class=moz-txt-link-rfc2396E
href="mailto:XSI@(protected)"><XSI@(protected)></A></TD><
/TR></TBODY></TABLE><BR>
<META content="MSHTML 6.00.2737.800" name=GENERATOR>
<STYLE></STYLE>
<DIV><FONT face=Arial size=2>Maybe I am dumb.....</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>how to convert a CString to a const char
*?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I need this to read files inside of a c++
operator...</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>really weird... just doesn't
work...</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>thanks,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial
size=2>helge</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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