named structure members

[Matthew Harrison <matth@3d-computers.co.uk>]

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hi,
  another one for you gurus, i haven't found anything on this myself
as i don't really know what to call it where a search engine is
concerned.

i have the following code.

<snip>
for(i = 0; i < n_values; ++i)
        {
                strcpy(keyword, good_values[i]);

                switch (read_config_var(values_file, keyword, value))
                {
                        case 0:
                                strcpy(config.?, value);
                                break;
                        case -1:
                                printf("\nFile Error for [%s] \n", values_file);
                                break;
                        case -2:
                                printf("\nBad User Parm for [%s] \n", keyword);
                                break;
                        default:
                                printf("\nUnknown Error Occurred \n");
                                break;
                }
        }
</snip>

what i'm doing is stepping thru an array of different config options
calling the read_config_var on each one and checking the output.
if the output is good then i want to store the value in a member of
a structure. for example i want the config options to be stored like
this:

config.db_host = 'maiden.genestate.com'
config.db_user = 'root'

you get the idea. my question is how do i dynamically assign a name
to a structure member. I have good_values[i] which contains the
current config directive but if you look at line 8 of the example,
you can see the problem, how do i say config.good_values[i], when
good_values[i] is not itself a member.

sorry for not being able to explain this very well but you can see
what i mean.

thanks in advance

-- 
Mat Harrison
Technical Developer
3d Computer Systems Ltd.
matth@3d-computers.co.uk

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