[PATCH] use strbuf_add_unique_abbrev() for adding short hashes

[PATCH] use strbuf_add_unique_abbrev() for adding short hashes

[René Scharfe]

Call strbuf_add_unique_abbrev() to add abbreviated hashes to strbufs
instead of taking detours through find_unique_abbrev() and its static
buffer.  This is shorter and a bit more efficient.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
---
 builtin/checkout.c |  3 +--
 pretty.c           | 13 ++++++-------
 transport.c        | 11 ++++-------
 3 files changed, 11 insertions(+), 16 deletions(-)

diff --git a/builtin/checkout.c b/builtin/checkout.c
index 27c1a05..0a7d24c 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -703,8 +703,7 @@ static int add_pending_uninteresting_ref(const char *refname,
 static void describe_one_orphan(struct strbuf *sb, struct commit *commit)
 {
 	strbuf_addstr(sb, "  ");
-	strbuf_addstr(sb,
-		find_unique_abbrev(commit->object.oid.hash, DEFAULT_ABBREV));
+	strbuf_add_unique_abbrev(sb, commit->object.oid.hash, DEFAULT_ABBREV);
 	strbuf_addch(sb, ' ');
 	if (!parse_commit(commit))
 		pp_commit_easy(CMIT_FMT_ONELINE, commit, sb);
diff --git a/pretty.c b/pretty.c
index 9fa42c2..9609afb 100644
--- a/pretty.c
+++ b/pretty.c
@@ -1143,8 +1143,8 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
 			strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_RESET));
 			return 1;
 		}
-		strbuf_addstr(sb, find_unique_abbrev(commit->object.oid.hash,
-						     c->pretty_ctx->abbrev));
+		strbuf_add_unique_abbrev(sb, commit->object.oid.hash,
+					 c->pretty_ctx->abbrev);
 		strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_RESET));
 		c->abbrev_commit_hash.len = sb->len - c->abbrev_commit_hash.off;
 		return 1;
@@ -1154,8 +1154,8 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
 	case 't':		/* abbreviated tree hash */
 		if (add_again(sb, &c->abbrev_tree_hash))
 			return 1;
-		strbuf_addstr(sb, find_unique_abbrev(commit->tree->object.oid.hash,
-						     c->pretty_ctx->abbrev));
+		strbuf_add_unique_abbrev(sb, commit->tree->object.oid.hash,
+					 c->pretty_ctx->abbrev);
 		c->abbrev_tree_hash.len = sb->len - c->abbrev_tree_hash.off;
 		return 1;
 	case 'P':		/* parent hashes */
@@ -1171,9 +1171,8 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
 		for (p = commit->parents; p; p = p->next) {
 			if (p != commit->parents)
 				strbuf_addch(sb, ' ');
-			strbuf_addstr(sb, find_unique_abbrev(
-					p->item->object.oid.hash,
-					c->pretty_ctx->abbrev));
+			strbuf_add_unique_abbrev(sb, p->item->object.oid.hash,
+						 c->pretty_ctx->abbrev);
 		}
 		c->abbrev_parent_hashes.len = sb->len -
 		                              c->abbrev_parent_hashes.off;
diff --git a/transport.c b/transport.c
index 4ba48b0..557f399 100644
--- a/transport.c
+++ b/transport.c
@@ -321,11 +321,6 @@ static void print_ref_status(char flag, const char *summary, struct ref *to, str
 	}
 }
 
-static const char *status_abbrev(unsigned char sha1[20])
-{
-	return find_unique_abbrev(sha1, DEFAULT_ABBREV);
-}
-
 static void print_ok_ref_status(struct ref *ref, int porcelain)
 {
 	if (ref->deletion)
@@ -340,7 +335,8 @@ static void print_ok_ref_status(struct ref *ref, int porcelain)
 		char type;
 		const char *msg;
 
-		strbuf_addstr(&quickref, status_abbrev(ref->old_oid.hash));
+		strbuf_add_unique_abbrev(&quickref, ref->old_oid.hash,
+					 DEFAULT_ABBREV);
 		if (ref->forced_update) {
 			strbuf_addstr(&quickref, "...");
 			type = '+';
@@ -350,7 +346,8 @@ static void print_ok_ref_status(struct ref *ref, int porcelain)
 			type = ' ';
 			msg = NULL;
 		}
-		strbuf_addstr(&quickref, status_abbrev(ref->new_oid.hash));
+		strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash,
+					 DEFAULT_ABBREV);
 
 		print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg, porcelain);
 		strbuf_release(&quickref);
-- 
2.9.2

Re: [PATCH] use strbuf_add_unique_abbrev() for adding short hashes

[Johannes Schindelin]

[-- Attachment #1: Type: text/plain, Size: 416 bytes --]

Hi René,

On Sat, 6 Aug 2016, René Scharfe wrote:

> Call strbuf_add_unique_abbrev() to add abbreviated hashes to strbufs
> instead of taking detours through find_unique_abbrev() and its static
> buffer.  This is shorter and a bit more efficient.

And less error-prone.

It is also a thing I need to change in my upcoming rebase--helper patches:
I had not known about this function.

Thank you,
Dscho

Re: [PATCH] use strbuf_add_unique_abbrev() for adding short hashes

[Jeff King]

On Sun, Aug 07, 2016 at 10:53:34AM +0200, Johannes Schindelin wrote:

> On Sat, 6 Aug 2016, René Scharfe wrote:
> 
> > Call strbuf_add_unique_abbrev() to add abbreviated hashes to strbufs
> > instead of taking detours through find_unique_abbrev() and its static
> > buffer.  This is shorter and a bit more efficient.
> 
> And less error-prone.
> 
> It is also a thing I need to change in my upcoming rebase--helper patches:
> I had not known about this function.

Great. I added it several months ago to avoid some hairy allocation
code, so I am glad to see it finding new uses (both this patch and
potential new ones).

-Peff