Re: [Qemu-devel] [PATCH V16 3/7] Create four QemuOptsList related functions

[Eric Blake]

On 06/18/2013 03:31 AM, Dong Xu Wang wrote:
> This patch creates 4 functions, count_opts_list, qemu_opts_append,
> qemu_opts_free and qemu_opts_print_help, they are used in following
> commits.
> 
> 
> 
> Signed-off-by: Dong Xu Wang <address@hidden>
> ---

> +
> +/* Create a new QemuOptsList and make its desc to the merge of first
> + * and second. It will allocate space for one new QemuOptsList plus

s/make its desc to the merge of/with a desc of the merge of the/

> + * enough space for QemuOptDesc in first and second QemuOptsList.
> + * First argument's QemuOptDesc members take precedence over second's.
> + * The result's name and implied_opt_name are not copied from them.
> + * Both merge_lists should not be set. Both list can be NULL.

s/list/lists/


> +    dest->name = "append_opts_list";
> +    dest->implied_opt_name = NULL;
> +    assert((!first || !first->merge_lists)
> +        && (!second || !second->merge_lists));

Indentation - usually, an operator is intended to the column after the
containing ( on the line above.

> +
> +/* free a QemuOptsList, can accept NULL as arguments */
> +void qemu_opts_free(QemuOptsList *list)
> +{
> +    g_free(list);
> +}

Do we really need a function for this, or can callers just call g_free
directly?  But it doesn't hurt to have the layer of indirection,
especially if we might be freeing more than one thing in the future.

> +
> +void qemu_opts_print_help(QemuOptsList *list)
> +{
> +    int i;
> +    printf("Supported options:\n");
> +    for (i = 0; list && list->desc[i].name; i++) {
> +        printf("%-16s %s\n", list->desc[i].name,
> +            list->desc[i].help ?

Indentation - 'list' should start on the column after the containing (
on the line above.

> +                list->desc[i].help : "No description available");
> +    }
> +}
> 

None of my findings are fatal to the algorithm, so I leave it up to the
maintainer whether to touch this up as part of preparing for a pull
request, or whether to request a v17 respin.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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