Re: Moving data into dynamic storage

[Rich Duzenbury <rduz@xxxxxxxxxxxxxxxxxxx>]

At 03:09 PM 11/22/02, you wrote:

> MOVEL will copy data up to the declared length of the result.
>
> D fld2          s        50a
> D result        s       100a  based(p)
> c        alloc    10       p
> c        movel    fld2     result
>
> This will copy all 50 bytes of fld2 to 'result'.  The 40 bytes following
> your 10 allocated bytes could be something important, and overwriting
> them could cause many different bad things to happen.
>
> Declaring the based result-field to be 1 byte would not cause this kind
> of storage-corruption problem, since you can't allocate less than 1
> byte.
Ok, I understand the potential problem.  I am currently trying to solve the
other half of it, where length of p is 500, but result being 100a loses 400
bytes in the movel.

Looks like memcpy works ok.  I just thought that perhaps there was an RPG
way to say 'set contents of memory pointed to by p to the string foo' --
looks like there is not.