Re: auto_ptr for array of built-ins

On Apr 17, 2:43 pm, Carlos Moreno <cm_n...@[EMAIL PROTECTED]
> wrote:
> Hi,
>
> I'm facing a situation where it would seem all possible solutions
> have some severe inconvenience.
>
> I'm creating a C++ wrapper for a C library;  in this one function,
> I need to return a string.  The underlying C library expects me
> to pass it a pointer where to put the result;  that pointer needs
> to be dynamically allocated in the general case.
>
> So, my function goes more or less like this:
>
> string f()
> {
>      char * result = new char [ ... ];
>
>      int length = call_c_function (result,  .... other
> parameters ... );
>          // the function places the result string in the memory
>          // pointed to by result, and it returns the length of the
> string
>
>      return string (result, result + length);
> }
>
> Ok, obvious problem, the memory leak;

Have you consider using alloca() instead of new[] ?

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