Re: converting wchar_t * to const wchar_t *

Article View: borland.public.cppbuilder.nativeapi

Article #215

Back to borland.public.cppbuilder.nativeapi Previous Next

#215

From: Remy Lebeau (TeamB)
Date: Mon, 07 Jul 2008 16:48

30 lines
1863 bytes

"Sean Farrow" <sean.farrow@seanfarrow.co.uk> wrote in message 
news:4870f768$1@newsgroups.borland.com...

> How can I convert wchar_t * to const wchar_t *?

I think you mean the other way around - how to convert a 'const wchar_t*' to 
a 'wchar_t*'.  The std::wstring::c_str() method returns a 'const' pointer 
that you cannot write to.

> I'm trying to use the MultiByteToWideChar function
> with an std::wstring as the output string.

That won't work, for the reason mentioned above.  You will have to use a 
separate wchar_t[] buffer first, and then copy it to the std::wstring 
afterwards, ie:

    int len = ::MultiByteToWideChar(CP_ACP, 0, __FUNC__, -1, NULL, 0);

    if( len > 0 )
    {
        std::vector<wchar_t> buffer(len);
        len = ::MultiByteToWideChar(CP_ACP, 0, __FUNC__, -1, &buffer[0], 
len);
        buffer[len] = L'\0';
        DragonInfo.FunctionName = &buffer[0];
    }


Gambit

Technical Details

Message-ID: <4872492e$3@newsgroups.borland.com>

Path:

arc1-ca.pugleaf.net!g2news1.google.com!news1.google.com!eweka.nl!lightspeed.eweka.nl!feeder.erje.net!news.isoc.lu!newsgroups.borland.com!not-for-mail

References: <4870f768$1@newsgroups.borland.com>

Show Full Headers

Complete Article Headers

X-Google-Thread: 10cc67,42b54d6e10712e77
X-Google-Attributes: gid10cc67,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
From: "Remy Lebeau \(TeamB\)" <no.spam@no.spam.com>
Newsgroups: borland.public.cppbuilder.nativeapi
References: <4870f768$1@newsgroups.borland.com>
Subject: Re: converting wchar_t * to const wchar_t *
Date: Mon, 7 Jul 2008 09:48:28 -0700
Lines: 32
Organization: Lebeau Software
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2900.3138
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198
X-RFC2646: Format=Flowed; Response
NNTP-Posting-Host: 207.178.157.90
Message-ID: <4872492e$3@newsgroups.borland.com>
X-Trace: newsgroups.borland.com 1215449390 207.178.157.90 (7 Jul 2008 09:49:50 -0700)
Path: arc1-ca.pugleaf.net!g2news1.google.com!news1.google.com!eweka.nl!lightspeed.eweka.nl!feeder.erje.net!news.isoc.lu!newsgroups.borland.com!not-for-mail

Reply to Parent Message