[U-Boot] [PATCH v2 2/6] common: command: Expose a generic helper to auto-complete sub commands

[Boris Brezillon <boris.brezillon@bootlin.com>]

On Thu, 29 Nov 2018 00:39:17 +0100
Boris Brezillon <boris.brezillon@bootlin.com> wrote:

> Some commands have a table of sub-commands. With a minor adjustments,

						   ^ s/a//

> complete_cmdv() is able to provide auto-completion for sub-commands
> (it's just about passing the table of commands instead of taking the
> global one).
> We rename this function into complete_subcmd() and implement
> complete_cmdv() as a wrapper around complete_subcmdv().
> 
> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
> ---
>  common/command.c  | 20 ++++++++++++++++----
>  include/command.h |  3 +++
>  2 files changed, 19 insertions(+), 4 deletions(-)
> 
> diff --git a/common/command.c b/common/command.c
> index 435824356b50..e13cb47ac18b 100644
> --- a/common/command.c
> +++ b/common/command.c
> @@ -161,11 +161,11 @@ int var_complete(int argc, char * const argv[], char last_char, int maxv, char *
>  
>  /*************************************************************************************/
>  
> -static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
> +int complete_subcmdv(cmd_tbl_t *cmdtp, int count, int argc,
> +		     char * const argv[], char last_char,
> +		     int maxv, char *cmdv[])
>  {
>  #ifdef CONFIG_CMDLINE
> -	cmd_tbl_t *cmdtp = ll_entry_start(cmd_tbl_t, cmd);
> -	const int count = ll_entry_count(cmd_tbl_t, cmd);
>  	const cmd_tbl_t *cmdend = cmdtp + count;
>  	const char *p;
>  	int len, clen;
> @@ -193,7 +193,7 @@ static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv
>  
>  	/* more than one arg or one but the start of the next */
>  	if (argc > 1 || last_char == '\0' || isblank(last_char)) {
> -		cmdtp = find_cmd(argv[0]);
> +		cmdtp = find_cmd_tbl(argv[0], cmdtp, count);
>  		if (cmdtp == NULL || cmdtp->complete == NULL) {
>  			cmdv[0] = NULL;
>  			return 0;
> @@ -238,6 +238,18 @@ static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv
>  #endif
>  }
>  
> +static int complete_cmdv(int argc, char * const argv[], char last_char,
> +			 int maxv, char *cmdv[])
> +{
> +#ifdef CONFIG_CMDLINE
> +	return complete_subcmdv(ll_entry_start(cmd_tbl_t, cmd),
> +				ll_entry_count(cmd_tbl_t, cmd), argc, argv,
> +				last_char, maxv, cmdv);
> +#else
> +	return 0;
> +#endif
> +}
> +
>  static int make_argv(char *s, int argvsz, char *argv[])
>  {
>  	int argc = 0;
> diff --git a/include/command.h b/include/command.h
> index 200c7a5e9f4e..89efcecfa926 100644
> --- a/include/command.h
> +++ b/include/command.h
> @@ -54,6 +54,9 @@ int _do_help (cmd_tbl_t *cmd_start, int cmd_items, cmd_tbl_t * cmdtp, int
>  	      flag, int argc, char * const argv[]);
>  cmd_tbl_t *find_cmd(const char *cmd);
>  cmd_tbl_t *find_cmd_tbl (const char *cmd, cmd_tbl_t *table, int table_len);
> +int complete_subcmdv(cmd_tbl_t *cmdtp, int count, int argc,
> +		     char * const argv[], char last_char, int maxv,
> +		     char *cmdv[]);
>  
>  extern int cmd_usage(const cmd_tbl_t *cmdtp);
>