Re: Initializer element is not constant

[Christoph Bussenius <busseniu@cip.physik.uni-muenchen.de>]

Hi Scott,

On Fri, Jan 21, 2005 at 02:31:57PM -0700, Scott wrote:
>  recip_data[0].var = namectrl;

namectrl is NULL, so why would you want to do this?  This is just like
writing

recip_data[0] = NULL;

I am not quite sure what you intend to do, but I guess that you want
namectrl to change when you change recip_data[0].  To accomplish this,
you could make recip_data[0] a pointer to a pointer:

char *namectrl = NULL;
char *name1 = NULL;
char *name2 = NULL;

typedef struct {
        char **var;      /* destination for storage of the data */
        size_t len;     /* max len of the data */
        char *(*xlat)();        /* translation routine */
} DATUM;                                                                                        

DATUM recip_data[] = {
{  &namectrl, NAMECTRL_LEN, make_upper },
{  &name1, NAME1_LEN, make_upper },
{  &name2, NAME2_LEN, make_upper },
[...]

Now you can change namectrl by saying
*recip_data[0].var = "test string";

Hope this helps,
Christoph

-- 
``There's no dark side of the moon, really
Matter of fact, it's all dark''

--Pink Floyd