[PATCH v3 2/4] commit: replace the raw buffer with strbuf in read_graft_line

[Patryk Obara <patryk.obara@gmail.com>]

This simplifies function declaration and allows for use of strbuf_rtrim
instead of modifying buffer directly.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
---
 builtin/blame.c |  2 +-
 commit.c        | 15 ++++++++-------
 commit.h        |  2 +-
 3 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/builtin/blame.c b/builtin/blame.c
index bda1a78..d4472e9 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -488,7 +488,7 @@ static int read_ancestry(const char *graft_file)
 		return -1;
 	while (!strbuf_getwholeline(&buf, fp, '\n')) {
 		/* The format is just "Commit Parent1 Parent2 ...\n" */
-		struct commit_graft *graft = read_graft_line(buf.buf, buf.len);
+		struct commit_graft *graft = read_graft_line(&buf);
 		if (graft)
 			register_commit_graft(graft, 0);
 	}
diff --git a/commit.c b/commit.c
index 8b28415..019e733 100644
--- a/commit.c
+++ b/commit.c
@@ -134,17 +134,18 @@ int register_commit_graft(struct commit_graft *graft, int ignore_dups)
 	return 0;
 }
 
-struct commit_graft *read_graft_line(char *buf, int len)
+struct commit_graft *read_graft_line(struct strbuf *line)
 {
 	/* The format is just "Commit Parent1 Parent2 ...\n" */
-	int i;
+	int i, len;
+	char *buf = line->buf;
 	struct commit_graft *graft = NULL;
 	const int entry_size = GIT_SHA1_HEXSZ + 1;
 
-	while (len && isspace(buf[len-1]))
-		buf[--len] = '\0';
-	if (buf[0] == '#' || buf[0] == '\0')
+	strbuf_rtrim(line);
+	if (line->buf[0] == '#' || line->len == 0)
 		return NULL;
+	len = line->len;
 	if ((len + 1) % entry_size)
 		goto bad_graft_data;
 	i = (len + 1) / entry_size - 1;
@@ -161,7 +162,7 @@ struct commit_graft *read_graft_line(char *buf, int len)
 	return graft;
 
 bad_graft_data:
-	error("bad graft data: %s", buf);
+	error("bad graft data: %s", line->buf);
 	free(graft);
 	return NULL;
 }
@@ -174,7 +175,7 @@ static int read_graft_file(const char *graft_file)
 		return -1;
 	while (!strbuf_getwholeline(&buf, fp, '\n')) {
 		/* The format is just "Commit Parent1 Parent2 ...\n" */
-		struct commit_graft *graft = read_graft_line(buf.buf, buf.len);
+		struct commit_graft *graft = read_graft_line(&buf);
 		if (!graft)
 			continue;
 		if (register_commit_graft(graft, 1))
diff --git a/commit.h b/commit.h
index 6d857f0..baecc0a 100644
--- a/commit.h
+++ b/commit.h
@@ -247,7 +247,7 @@ struct commit_graft {
 };
 typedef int (*each_commit_graft_fn)(const struct commit_graft *, void *);
 
-struct commit_graft *read_graft_line(char *buf, int len);
+struct commit_graft *read_graft_line(struct strbuf *line);
 int register_commit_graft(struct commit_graft *, int);
 struct commit_graft *lookup_commit_graft(const struct object_id *oid);
 
-- 
2.9.5