On Mon, Jun 23, 2008 at 07:16:17PM +0000, Linus Torvalds wrote:
quoted text
>=20
>=20
> On Mon, 23 Jun 2008, Linus Torvalds wrote:
> >=20
> > Or are we going to sit around discussing this for another five months?
>=20
> So the gauntlet is thrown.

  Let's see if I can catch it elegantly.

  Following is a series split into incremental patches to migrate the
parse_options API to an incremental one. Only the last step provides a
functional incremental API.

  With that, you write parsers this way:



{
    struct parse_opt_ctx_t ctx;

    parse_options_start(&ctx, argc, argv, 0);

    for (;;) {
        const char *arg;

        switch (parse_options_step(&ctx, options, usagestr)) {
        case PARSE_OPT_HELP:
            /* dump your help here, the one for options/usagestr is already=
 dumped */
            exit(129);
        case PARSE_OPT_DONE:
            goto done;
        }

        arg =3D *ctx->argv++;
        ctx->argc--;

        if (strcmp(arg, "-")) {
            /* you're on baby ! */
        } else if ....
        } else {
            error("unknown option %s", arg);
            parse_options_usage(options, usagestr);
            /* dump your help here */
            exit(129);
        }
    }

done:
    argc =3D parse_options_end(&ctx);
}


It's slightly more involved than what Linus handwaved, but I believe
it's usable this way.

--=20
=C2=B7O=C2=B7  Pierre Habouzit
=C2=B7=C2=B7O                                                madcoder@debia=
n.org
OOO                                                http://www.madism.org