[PATCH 6/8] [GSOC] ref-filter: remove grab_oid() function

["ZheNing Hu via GitGitGadget" <gitgitgadget@gmail.com>]

From: ZheNing Hu <adlternative@gmail.com>

Because "atom_type == ATOM_OBJECTNAME" implies the condition
of `starts_with(name, "objectname")`, "atom_type == ATOM_TREE"
implies the condition of `starts_with(name, "tree")`, so the
check for `starts_with(name, field)` in grab_oid() is redundant.

Remove the grab_oid() from ref-filter, to reduce repeated check.

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Hariom Verma <hariom18599@gmail.com>
Signed-off-by: ZheNing Hu <adlternative@gmail.com>
---
 ref-filter.c | 26 +++++++++-----------------
 1 file changed, 9 insertions(+), 17 deletions(-)

diff --git a/ref-filter.c b/ref-filter.c
index 8dca273f720..67f62a3b591 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -1071,16 +1071,6 @@ static const char *do_grab_oid(const char *field, const struct object_id *oid,
 	}
 }
 
-static int grab_oid(const char *name, const char *field, const struct object_id *oid,
-		    struct atom_value *v, struct used_atom *atom)
-{
-	if (starts_with(name, field)) {
-		v->s = xstrdup(do_grab_oid(field, oid, atom));
-		return 1;
-	}
-	return 0;
-}
-
 /* See grab_values */
 static void grab_common_values(struct atom_value *val, int deref, struct expand_data *oi)
 {
@@ -1106,8 +1096,9 @@ static void grab_common_values(struct atom_value *val, int deref, struct expand_
 			}
 		} else if (atom_type == ATOM_DELTABASE)
 			v->s = xstrdup(oid_to_hex(&oi->delta_base_oid));
-		else if (atom_type == ATOM_OBJECTNAME && deref)
-			grab_oid(name, "objectname", &oi->oid, v, &used_atom[i]);
+		else if (atom_type == ATOM_OBJECTNAME && deref) {
+			v->s = xstrdup(do_grab_oid("objectname", &oi->oid, &used_atom[i]));
+		}
 	}
 }
 
@@ -1148,9 +1139,10 @@ static void grab_commit_values(struct atom_value *val, int deref, struct object
 			continue;
 		if (deref)
 			name++;
-		if (atom_type == ATOM_TREE &&
-		    grab_oid(name, "tree", get_commit_tree_oid(commit), v, &used_atom[i]))
+		if (atom_type == ATOM_TREE) {
+			v->s = xstrdup(do_grab_oid("tree", get_commit_tree_oid(commit), &used_atom[i]));
 			continue;
+		}
 		if (atom_type == ATOM_NUMPARENT) {
 			v->value = commit_list_count(commit->parents);
 			v->s = xstrfmt("%lu", (unsigned long)v->value);
@@ -1923,9 +1915,9 @@ static int populate_value(struct ref_array_item *ref, struct strbuf *err)
 				v->s = xstrdup(buf + 1);
 			}
 			continue;
-		} else if (!deref && atom_type == ATOM_OBJECTNAME &&
-			   grab_oid(name, "objectname", &ref->objectname, v, atom)) {
-				continue;
+		} else if (!deref && atom_type == ATOM_OBJECTNAME) {
+			   v->s = xstrdup(do_grab_oid("objectname", &ref->objectname, atom));
+			   continue;
 		} else if (atom_type == ATOM_HEAD) {
 			if (atom->u.head && !strcmp(ref->refname, atom->u.head))
 				v->s = xstrdup("*");
-- 
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