Re: String buffers

[Asko Kauppi <askok@...>]

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No, I think not (without patching the Lua C/API, that is).

David Given kirjoitti 2.2.2006 kello 19.44:

> I'm trying to wrap a particular API function that writes a string  
> into a
> buffer.
>
> I can call the function to tell me how long the buffer needs to be,  
> and I can
> call it again to actually write the string:
>
> {
> 	int length = myapi(NULL, 0);
> 	char* buffer = malloc(length);
> 	(void) myapi(buffer, length);
>
> 	lua_pushlstring(L, buffer, length);
> 	free(buffer);
> }
>
> I'd like to avoid the temporary buffer. Is there any way of  
> persuading Lua to
> allocate an *uninitialised* string of a particular length on the  
> stack, and
> then giving me a pointer to it so I can fill in that data one's the  
> string's
> been allocated?
>
> --
> +- David Given --McQ-+ "There is nothing in the world so dangerous ---
> |  dg@cowlark.com    | and I mean *nothing* --- as a children's  
> story that
> | (dg@tao-group.com) | happens to be true." --- Master Li Kao, _The  
> Bridge
> +- www.cowlark.com --+ of Birds_

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