Function merge_core_dir_configs

server/core.c:221–453

}

static void *merge_core_dir_configs(apr_pool_t *a, void *basev, void *newv)
{
    core_dir_config *base = (core_dir_config *)basev;
    core_dir_config *new = (core_dir_config *)newv;
    core_dir_config *conf;

    /* Create this conf by duplicating the base, replacing elements
     * (or creating copies for merging) where new-> values exist.
     */
    conf = (core_dir_config *)apr_pmemdup(a, base, sizeof(core_dir_config));

    conf->d = new->d;
    conf->d_is_fnmatch = new->d_is_fnmatch;
    conf->d_components = new->d_components;
    conf->r = new->r;
    conf->refs = new->refs;
    conf->condition = new->condition;

    if (new->opts & OPT_UNSET) {
        /* there was no explicit setting of new->opts, so we merge
         * preserve the invariant (opts_add & opts_remove) == 0
         */
        conf->opts_add = (conf->opts_add & ~new->opts_remove) | new->opts_add;
        conf->opts_remove = (conf->opts_remove & ~new->opts_add)
                            | new->opts_remove;
        conf->opts = (conf->opts & ~conf->opts_remove) | conf->opts_add;

        /* If Includes was enabled with exec in the base config, but
         * was enabled without exec in the new config, then disable
         * exec in the merged set. */
        if (((base->opts & (OPT_INCLUDES|OPT_INC_WITH_EXEC))
             == (OPT_INCLUDES|OPT_INC_WITH_EXEC))
            && ((new->opts & (OPT_INCLUDES|OPT_INC_WITH_EXEC))
                == OPT_INCLUDES)) {
            conf->opts &= ~OPT_INC_WITH_EXEC;
        }
    }
    else {
        /* otherwise we just copy, because an explicit opts setting
         * overrides all earlier +/- modifiers
         */
        conf->opts = new->opts;
        conf->opts_add = new->opts_add;
        conf->opts_remove = new->opts_remove;
    }

    if (!(new->override & OR_UNSET)) {
        conf->override = new->override;
    }

    if (!(new->override_opts & OPT_UNSET)) {
        conf->override_opts = new->override_opts;
    }

    if (new->override_list != NULL) {
        conf->override_list = new->override_list;
    }