troubleshooting Question

Convert Multi Byte 2 Wide Char crash sometimes

Avatar of gammae
gammae asked on
C++
5 Comments1 Solution1251 ViewsLast Modified:
I have a function that sometime cause my program to crash, I did not writethe function myself, could someone tell me what could be causing the crash?

Here's the function:

std::wstring multi_byte_2_wide_char(
            const char* pStr,
            int nLen,
            UINT nCodePage )
      {
            assert( pStr != NULL );
            assert( nLen >= 0 || nLen == -1 );

            // figure out how many wide characters we are going to get
            int nChars = MultiByteToWideChar( nCodePage , 0 , pStr , nLen , NULL , 0 ) ;
            if ( nLen == -1 ) --nChars ;
            if ( nChars == 0 ) return L"";

            // convert the narrow string to a wide string
            // nb: slightly naughty to write directly into the string like this
            std::wstring buf;
            buf.resize( nChars );
            MultiByteToWideChar( nCodePage , 0 , pStr , nLen ,
                  const_cast<wchar_t*>(buf.c_str()) , nChars ) ;

            return buf;
      }

Whe debugging, it seems to crash on the "return buf", here's the last function in the call stack is a malloc and it's where it crash.

Any idea someone?
ASKER CERTIFIED SOLUTION
Log in to continue reading
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform for $9.99/mo
View membership options
Unlock 1 Answer and 5 Comments.
or
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
See how we're fighting big data
The Value of Experts Exchange in My Daily IT Life

Experts Exchange (EE) has become my company's go-to resource to get answers. I've used EE to make decisions, solve problems and even save customers. OutagesIO has been a challenging project and... Keep reading >>

Mike

Owner of Outages.IO
Phoenix, Arizona, United States
Member Since 2016
Join a full scale community that combines the best parts of other tools into one platform.
Unlock 1 Answer and 5 Comments.
View membership options
“All of life is about relationships, and EE has made a virtual community a real community. It lifts everyone's boat.”
William Peck

Member since 2004