Re: [PATCH 25/76] diff.c: convert --stat*

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On Thu, Jan 17, 2019 at 08:05:24PM +0700, Nguyễn Thái Ngọc Duy wrote:
> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
> ---
>  diff.c | 113 ++++++++++++++++++++++++++-------------------------------
>  1 file changed, 52 insertions(+), 61 deletions(-)
> 
> diff --git a/diff.c b/diff.c
> index 4398b30f47..1b01b36507 100644
> --- a/diff.c
> +++ b/diff.c
> @@ -4660,77 +4660,56 @@ int parse_long_opt(const char *opt, const char **argv,
>  	return 2;
>  }
>  
> -static int stat_opt(struct diff_options *options, const char **av)
> +static int diff_opt_stat(const struct option *opt, const char *value, int unset)
>  {
> -	const char *arg = av[0];
> -	char *end;
> +	struct diff_options *options = opt->value;
>  	int width = options->stat_width;
>  	int name_width = options->stat_name_width;
>  	int graph_width = options->stat_graph_width;
>  	int count = options->stat_count;
> -	int argcount = 1;
> +	char *end;
>  
> -	if (!skip_prefix(arg, "--stat", &arg))
> -		BUG("stat option does not begin with --stat: %s", arg);
> -	end = (char *)arg;
> +	BUG_ON_OPT_NEG(unset);
>  
> -	switch (*arg) {
> -	case '-':
> -		if (skip_prefix(arg, "-width", &arg)) {
> -			if (*arg == '=')
> -				width = strtoul(arg + 1, &end, 10);
> -			else if (!*arg && !av[1])
> -				die_want_option("--stat-width");
> -			else if (!*arg) {
> -				width = strtoul(av[1], &end, 10);
> -				argcount = 2;
> -			}
> -		} else if (skip_prefix(arg, "-name-width", &arg)) {
> -			if (*arg == '=')
> -				name_width = strtoul(arg + 1, &end, 10);
> -			else if (!*arg && !av[1])
> -				die_want_option("--stat-name-width");
> -			else if (!*arg) {
> -				name_width = strtoul(av[1], &end, 10);
> -				argcount = 2;
> -			}
> -		} else if (skip_prefix(arg, "-graph-width", &arg)) {
> -			if (*arg == '=')
> -				graph_width = strtoul(arg + 1, &end, 10);
> -			else if (!*arg && !av[1])
> -				die_want_option("--stat-graph-width");
> -			else if (!*arg) {
> -				graph_width = strtoul(av[1], &end, 10);
> -				argcount = 2;
> -			}
> -		} else if (skip_prefix(arg, "-count", &arg)) {
> -			if (*arg == '=')
> -				count = strtoul(arg + 1, &end, 10);
> -			else if (!*arg && !av[1])
> -				die_want_option("--stat-count");
> -			else if (!*arg) {
> -				count = strtoul(av[1], &end, 10);
> -				argcount = 2;
> -			}

This hunk removes the last couple of callsites of the static
die_want_option() function, and building this commit fails with:

  diff.c:107:22: error: ‘die_want_option’ defined but not used [-Werror=unused-function]
   static NORETURN void die_want_option(const char *option_name)
                        ^~~~~~~~~~~~~~~
  cc1: all warnings being treated as errors






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