Article View: borland.public.cppbuilder.nativeapi
Article #10668Re: DLL and std::string?
From: nicolasr
Date: Wed, 07 Apr 2004 17:17
Date: Wed, 07 Apr 2004 17:17
44 lines
2340 bytes
2340 bytes
thanks for the code. I switched everything to using char*
and added the missing __stdcall declaraction.
The ifstream stack corruption remains, though. I also
searched Google and it seems other people had similar problems.
I replaced std::ifstream with TFileStream and now it works!
Nick
> It is not related to the std::ifstream itself, but more likely to the
> std::string that you passed to it. Once you change to char* instead, you
> shouldn't have the problem anymore. For example:
>
> bool FileType1Test(const char *fileName)
> {
> ifstream in(fileName);
>
> char c;
> in >> c;
>
> return ( c == 'A' );
> }
>
> extern "C" __declspec(dllexport) char* __stdcall Validate(const char*
> funcName, const char* args)
> {
> if( std::string(funcName) == "FileType1Test" )
> return FileType1Test(args) ? "TRUE" : "FALSE";
> else
> return "FALSE";
> }
>
> > typedef void (*PTestFunc)(const char* fileName);
>
> You left out the __stdcall convention, thus you are going to corrupt the
> stack. It needs to be this instead:
>
> typedef void (__stdcall *PTestFunc)(const char* fileName);
>
>
>
> Gambit
>
>
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 10cc67,fd71d18cb19fccaf X-Google-Attributes: gid10cc67,public X-Google-ArrivalTime: 2004-04-07 10:26:07 PST From: "nicolasr" <nicolasrNOSPAMATSIGNgmx.net> Newsgroups: borland.public.cppbuilder.nativeapi References: <40733f34@newsgroups.borland.com> <40734b69$1@newsgroups.borland.com> <407356a8$1@newsgroups.borland.com> <407357f0@newsgroups.borland.com> Subject: Re: DLL and std::string? Date: Wed, 7 Apr 2004 19:17:05 +0200 Lines: 46 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 NNTP-Posting-Host: 80.133.160.248 Message-ID: <40743797@newsgroups.borland.com> X-Trace: newsgroups.borland.com 1081358231 80.133.160.248 (7 Apr 2004 10:17:11 -0800) Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!news.glorb.com!newsrout1.ntli.net!news.ntli.net!colt.net!diablo.netcom.net.uk!netcom.net.uk!newsfeed.icl.net!proxad.net!203.109.252.33.MISMATCH!newsfeeds.ihug.co.nz!ihug.co.nz!newsgroups.borland.com!not-for-mail