[DUG] StrCopy problem

[David Moorhouse]

Your answer is in the help file

/Use StrCopy to copy Source to Dest. StrCopy returns Dest. /

//

/StrCpy does not perform any length checking. The destination buffer 
must have room for at least //StrLen 
<http://docs.embarcadero.com/products/rad_studio/delphiAndcpp2009/HelpUpdate2/EN/html/delphivclwin32/SysUtils_StrLen@PAnsiChar.html>//(Source)+1 
characters. /

//

/For length checking, use the //StrLCopy 
<http://docs.embarcadero.com/products/rad_studio/delphiAndcpp2009/HelpUpdate2/EN/html/delphivclwin32/SysUtils_StrLCopy@PAnsiChar@PAnsiChar@Cardinal.html>//function. 
/

///**//
/
D


On 12/05/13 14:45, Ross Levis wrote:
>
> Doesn't really help.
>
> a := 'abcdefghi' does allocate 9 bytes of RAM.  I can access a and b 
> after it is assigned.  The problem is StrCopy crashes.  I would expect 
> "a" to have the same string as b once this is executed.
>
> Ross.
>
> *From:*delphi-bounces at listserver.123.net.nz 
> [mailto:delphi-bounces at listserver.123.net.nz] *On Behalf Of *Keith 
> Allpress
> *Sent:* Sunday, 12 May 2013 10:27 AM
> *To:* 'NZ Borland Developers Group - Delphi List'
> *Subject:* Re: [DUG] StrCopy problem
>
> Perhaps:
>
> http://rvelthuis.de/articles/articles-pchars.html
>
> *From:*delphi-bounces at listserver.123.net.nz 
> <mailto:delphi-bounces at listserver.123.net.nz> 
> [mailto:delphi-bounces at listserver.123.net.nz] *On Behalf Of *Ross Levis
> *Sent:* Sunday, 12 May 2013 2:39 a.m.
> *To:* 'NZ Borland Developers Group - Delphi List'
> *Subject:* [DUG] StrCopy problem
>
> var
>
>   a: pChar;
>
>   b: pChar;
>
> begin
>
>   a := 'abcdefghi';
>
>   b := 'jklmnopqr';
>
>   StrCopy(a,b);
>
> end;
>
> Question:  Why does this code crash?
>
>
>
> _______________________________________________
> NZ Borland Developers Group - Delphi mailing list
> Post: delphi at listserver.123.net.nz
> Admin: http://delphi.org.nz/mailman/listinfo/delphi
> Unsubscribe: send an email to delphi-request at listserver.123.net.nz with Subject: unsubscribe

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://listserver.123.net.nz/pipermail/delphi/attachments/20130512/e2635499/attachment.html