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Groups > comp.lang.c++ > #12835

Re: vector as a char buffer ?

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"Asger Joergensen" <Junk@Asger-P.dk> writes:

> Hi

Hello,

> I'm not that used to the stl so I ask to be on the safe side:
>
> typedef std::vector<char> TMembuf;
>  
> TMembuf buf(1000);
> char* p = &buf[0];
>
> I have tested it and it seem to work fine just like:
>
> char* p = new char[1000];
>
> and without the delete[];
>
> But is there any downside to doing like this ?

This is not recommended, of course.  You didn't even use any of
the vector facilities, in this case.  Vectors provide the method
reserve().

However if you want a buffer, there's circular buffer in boost
library.

-- 
Carl Lei (XeCycle)
Department of Physics, Shanghai Jiao Tong University
OpenPGP public key: 7795E591
Fingerprint: 1FB6 7F1F D45D F681 C845 27F7 8D71 8EC4 7795 E591

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vector as a char buffer ? "Asger Joergensen" <Junk@Asger-P.dk> - 2011-12-27 13:26 +0000
  Re: vector as a char buffer ? Victor Bazarov <v.bazarov@comcast.invalid> - 2011-12-27 09:04 -0500
    Re: vector as a char buffer ? "Asger Joergensen" <Junk@Asger-P.dk> - 2011-12-27 20:25 +0000
    Re: vector as a char buffer ? Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-12-27 21:05 +0000
  Re: vector as a char buffer ? XeCycle <xecycle@gmail.com> - 2011-12-28 12:27 +0800
    Re: vector as a char buffer ? Victor Bazarov <v.bazarov@comcast.invalid> - 2011-12-28 08:56 -0500

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