Re: [Qemu-devel] [PATCH V2 5/7] monitor: support sub commands in auto completion

[Luiz Capitulino <lcapitulino@redhat.com>]

On Wed, 26 Jun 2013 12:03:39 +0800
Wenchao Xia <xiawenc@linux.vnet.ibm.com> wrote:

> 于 2013-6-24 20:48, Wenchao Xia 写道:
> > This patch allow auot completion work normal in sub command case,
> > "info block [DEVICE]" can auto complete now, by re-enter the completion
> > function. Also, original "info" is treated as a special case, now it is
> > treated as a sub command group, global variable info_cmds is not used
> > any more.
> > 
> > "help" command is still treated as a special case, since it is not a sub
> > command group but want to auto complete command in root command table.
> > 
> > Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
> > ---
> >   monitor.c |   36 ++++++++++++++++++++++++------------
> >   1 files changed, 24 insertions(+), 12 deletions(-)
> > 
> > diff --git a/monitor.c b/monitor.c
> > index aa641de..f364a0d 100644
> > --- a/monitor.c
> > +++ b/monitor.c
> > @@ -4179,10 +4179,11 @@ static const char *next_arg_type(const char *typestr)
> >       return (p != NULL ? ++p : typestr);
> >   }
> > 
> > -static void monitor_find_completion(Monitor *mon,
> > -                                    const char *cmdline)
> > +static void monitor_find_completion_by_table(Monitor *mon,
> > +                                             const mon_cmd_t *cmd_table,
> > +                                             const char *cmdline)
> >   {
> > -    const char *cmdname;
> > +    const char *cmdname, *p;
> >       char *args[MAX_ARGS];
> >       int nb_args, i, len;
> >       const char *ptype, *str;
> > @@ -4212,12 +4213,12 @@ static void monitor_find_completion(Monitor *mon,
> >           else
> >               cmdname = args[0];
> >           readline_set_completion_index(mon->rs, strlen(cmdname));
> > -        for (cmd = mon->cmd_table; cmd->name != NULL; cmd++) {
> > +        for (cmd = cmd_table; cmd->name != NULL; cmd++) {
> >               cmd_completion(mon, cmdname, cmd->name);
> >           }
> >       } else {
> >           /* find the command */
> > -        for (cmd = mon->cmd_table; cmd->name != NULL; cmd++) {
> > +        for (cmd = cmd_table; cmd->name != NULL; cmd++) {
> >               if (compare_cmd(args[0], cmd->name)) {
> >                   break;
> >               }
> > @@ -4226,6 +4227,17 @@ static void monitor_find_completion(Monitor *mon,
> >               goto cleanup;
> >           }
> > 
> > +        /* locate next valid string in original cmdline used by re-enter */
> > +        p = cmdline + strlen(args[0]);
> > +        while (qemu_isspace(*p)) {
> > +            p++;
> > +        }
> > +
>   Here it can't handle command start with space such as "   blk", I plan
> make parse_cmdline() return additional const char **args_cmdline, which
> point to cmdline correspond to each args. Just want to
> mention it to save reviewer's time, I'll fix it with any other
> comments:).

I prefer you respin it first, because it's not unusual that a single
change like this one ends up requiring more changes. Also, if the series
is good enough I can apply it w/o having to wait for another version.

> 
> 
> > +        if (cmd->sub_table) {
> > +            monitor_find_completion_by_table(mon, cmd->sub_table, p);
> > +            goto cleanup;
> > +        }
> > +
> >           ptype = next_arg_type(cmd->args_type);
> >           for(i = 0; i < nb_args - 2; i++) {
> >               if (*ptype != '\0') {
> > @@ -4252,13 +4264,7 @@ static void monitor_find_completion(Monitor *mon,
> >               bdrv_iterate(block_completion_it, &mbs);
> >               break;
> >           case 's':
> > -            /* XXX: more generic ? */
> > -            if (!strcmp(cmd->name, "info")) {
> > -                readline_set_completion_index(mon->rs, strlen(str));
> > -                for(cmd = info_cmds; cmd->name != NULL; cmd++) {
> > -                    cmd_completion(mon, str, cmd->name);
> > -                }
> > -            } else if (!strcmp(cmd->name, "sendkey")) {
> > +            if (!strcmp(cmd->name, "sendkey")) {
> >                   char *sep = strrchr(str, '-');
> >                   if (sep)
> >                       str = sep + 1;
> > @@ -4284,6 +4290,12 @@ cleanup:
> >       }
> >   }
> > 
> > +static void monitor_find_completion(Monitor *mon,
> > +                                    const char *cmdline)
> > +{
> > +    return monitor_find_completion_by_table(mon, mon->cmd_table, cmdline);
> > +}
> > +
> >   static int monitor_can_read(void *opaque)
> >   {
> >       Monitor *mon = opaque;
> > 
> 
>