Re: [PATCH v5 02/12] ref-filter: use strbuf_split_str_omit_term()

[Jeff King <peff@peff.net>]

On Tue, Feb 16, 2016 at 02:22:32PM -0500, Jeff King wrote:

> On Wed, Feb 17, 2016 at 12:30:05AM +0530, Karthik Nayak wrote:
> 
> > Use the newly introduced strbuf_split_str_omit_term() rather than
> > using strbuf_split_str() and manually removing the ',' terminator.
> > 
> > Helped-by: Eric Sunshine <sunshine@sunshineco.com>
> > Signed-off-by: Karthik Nayak <Karthik.188@gmail.com>
> > ---
> >  ref-filter.c | 9 +--------
> >  1 file changed, 1 insertion(+), 8 deletions(-)
> 
> Did you consider just using string_list_split for this? AFAICT, you
> don't care about the results being strbufs themselves, and it would do
> what you want without having to bother with patch 1. The result would
> look something like the patch below.

Probably help if I actually included the patch.

---
diff --git a/ref-filter.c b/ref-filter.c
index 9ccfc51..45b3352 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -886,41 +886,34 @@ static void populate_value(struct ref_array_item *ref)
 			continue;
 		} else if (match_atom_name(name, "align", &valp)) {
 			struct align *align = &v->u.align;
-			struct strbuf **s, **to_free;
+			struct string_list params = STRING_LIST_INIT_DUP;
+			int i;
 			int width = -1;
 
 			if (!valp)
 				die(_("expected format: %%(align:<width>,<position>)"));
 
-			/*
-			 * TODO: Implement a function similar to strbuf_split_str()
-			 * which would omit the separator from the end of each value.
-			 */
-			s = to_free = strbuf_split_str(valp, ',', 0);
-
 			align->position = ALIGN_LEFT;
 
-			while (*s) {
-				/*  Strip trailing comma */
-				if (s[1])
-					strbuf_setlen(s[0], s[0]->len - 1);
-				if (!strtoul_ui(s[0]->buf, 10, (unsigned int *)&width))
+			string_list_split(&params, valp, ',', -1);
+			for (i = 0; i < params.nr; i++) {
+				const char *p = params.items[i].string;
+				if (!strtoul_ui(p, 10, (unsigned int *)&width))
 					;
-				else if (!strcmp(s[0]->buf, "left"))
+				else if (!strcmp(p, "left"))
 					align->position = ALIGN_LEFT;
-				else if (!strcmp(s[0]->buf, "right"))
+				else if (!strcmp(p, "right"))
 					align->position = ALIGN_RIGHT;
-				else if (!strcmp(s[0]->buf, "middle"))
+				else if (!strcmp(p, "middle"))
 					align->position = ALIGN_MIDDLE;
 				else
-					die(_("improper format entered align:%s"), s[0]->buf);
-				s++;
+					die(_("improper format entered align:%s"), p);
 			}
 
 			if (width < 0)
 				die(_("positive width expected with the %%(align) atom"));
 			align->width = width;
-			strbuf_list_free(to_free);
+			string_list_clear(&params, 0);
 			v->handler = align_atom_handler;
 			continue;
 		} else if (!strcmp(name, "end")) {