Re: Moving data into dynamic storage

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.