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[PATCH v2 08/18] ref-filter: get rid of goto

From
Olga Telezhnaya <olyatelezhnaya@gmail.com>
Date
Jan 10, 2018, 09:36 UTC
Message-ID
<01020160df6dc55c-8460a406-3567-42b0-9f03-733e7c64792a-000000@eu-west-1.amazonses.com>
In-Reply-To
<01020160df6dc499-0e6d11ec-1dcd-4a71-997b-ea231f33fae4-000000@eu-west-1.amazonses.com>
Get rid of goto command in ref-filter for better readability.
Signed-off-by: Olga Telezhnaia <olyatelezhnaya@gmail.com>
Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored by: Jeff King <peff@peff.net>
---
 ref-filter.c | 103 ++++++++++++++++++++++++++++++-----------------------------
 1 file changed, 53 insertions(+), 50 deletions(-)
diff --git a/ref-filter.c b/ref-filter.c
index bb09875e2dbf4..575c5351d0f79 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -1403,16 +1403,60 @@ static const char *get_refname(struct used_atom *atom, struct ref_array_item *re
 	return show_ref(&atom->u.refname, ref->refname);
 }
 
+static void need_object(struct ref_array_item *ref) {
+	struct object *obj;
+	const struct object_id *tagged;
+	unsigned long size;
+	int eaten;
+	void *buf = get_obj(&ref->objectname, &obj, &size, &eaten);
+	if (!buf)
+		die(_("missing object %s for %s"),
+		    oid_to_hex(&ref->objectname), ref->refname);
+	if (!obj)
+		die(_("parse_object_buffer failed on %s for %s"),
+		    oid_to_hex(&ref->objectname), ref->refname);
+
+	grab_values(ref->value, 0, obj, buf, size);
+	if (!eaten)
+		free(buf);
+
+	/*
+	 * If there is no atom that wants to know about tagged
+	 * object, we are done.
+	 */
+	if (!need_tagged || (obj->type != OBJ_TAG))
+		return;
+
+	/*
+	 * If it is a tag object, see if we use a value that derefs
+	 * the object, and if we do grab the object it refers to.
+	 */
+	tagged = &((struct tag *)obj)->tagged->oid;
+
+	/*
+	 * NEEDSWORK: This derefs tag only once, which
+	 * is good to deal with chains of trust, but
+	 * is not consistent with what deref_tag() does
+	 * which peels the onion to the core.
+	 */
+	buf = get_obj(tagged, &obj, &size, &eaten);
+	if (!buf)
+		die(_("missing object %s for %s"),
+		    oid_to_hex(tagged), ref->refname);
+	if (!obj)
+		die(_("parse_object_buffer failed on %s for %s"),
+		    oid_to_hex(tagged), ref->refname);
+	grab_values(ref->value, 1, obj, buf, size);
+	if (!eaten)
+		free(buf);
+}
+
 /*
  * Parse the object referred by ref, and grab needed value.
  */
 static void populate_value(struct ref_array_item *ref)
 {
-	void *buf;
-	struct object *obj;
-	int eaten, i;
-	unsigned long size;
-	const struct object_id *tagged;
+	int i;
 
 	ref->value = xcalloc(used_atom_cnt, sizeof(struct atom_value));
 
@@ -1526,53 +1570,12 @@ static void populate_value(struct ref_array_item *ref)
 
 	for (i = 0; i < used_atom_cnt; i++) {
 		struct atom_value *v = &ref->value[i];
-		if (v->s == NULL)
-			goto need_obj;
+		if (v->s == NULL) {
+			need_object(ref);
+			break;
+		}
 	}
 	return;
-
- need_obj:
-	buf = get_obj(&ref->objectname, &obj, &size, &eaten);
-	if (!buf)
-		die(_("missing object %s for %s"),
-		    oid_to_hex(&ref->objectname), ref->refname);
-	if (!obj)
-		die(_("parse_object_buffer failed on %s for %s"),
-		    oid_to_hex(&ref->objectname), ref->refname);
-
-	grab_values(ref->value, 0, obj, buf, size);
-	if (!eaten)
-		free(buf);
-
-	/*
-	 * If there is no atom that wants to know about tagged
-	 * object, we are done.
-	 */
-	if (!need_tagged || (obj->type != OBJ_TAG))
-		return;
-
-	/*
-	 * If it is a tag object, see if we use a value that derefs
-	 * the object, and if we do grab the object it refers to.
-	 */
-	tagged = &((struct tag *)obj)->tagged->oid;
-
-	/*
-	 * NEEDSWORK: This derefs tag only once, which
-	 * is good to deal with chains of trust, but
-	 * is not consistent with what deref_tag() does
-	 * which peels the onion to the core.
-	 */
-	buf = get_obj(tagged, &obj, &size, &eaten);
-	if (!buf)
-		die(_("missing object %s for %s"),
-		    oid_to_hex(tagged), ref->refname);
-	if (!obj)
-		die(_("parse_object_buffer failed on %s for %s"),
-		    oid_to_hex(tagged), ref->refname);
-	grab_values(ref->value, 1, obj, buf, size);
-	if (!eaten)
-		free(buf);
 }
 
 /*

--
https://github.com/git/git/pull/450
Previous: Olga TelezhnayaNext: Olga Telezhnaya
Message 5 of 47 in “cat-file: split expand_atom into 2 functions”
  1. 01/18 cat-file: split expand_atom into 2 functionsOlga Telezhnaya, Jan 10, 2018
  2. 14/18 ref-filter: get rid of expand_atom_into_fieldsOlga Telezhnaya, Jan 10, 2018
  3. 15/18 ref-filter: add is_cat flagOlga Telezhnaya, Jan 10, 2018
  4. 16/18 ref_format: add split_on_whitespace flagOlga Telezhnaya, Jan 10, 2018
  5. 08/18 ref-filter: get rid of gotoOlga Telezhnaya, Jan 10, 2018
  6. 18/18 ref-filter: make cat_file_info independentOlga Telezhnaya, Jan 10, 2018
  7. 02/18 cat-file: reuse struct ref_formatOlga Telezhnaya, Jan 10, 2018
  8. Jeff KingJan 15, 2018
  9. Оля ТележнаяJan 16, 2018
  10. 07/18 cat-file: remove unused codeOlga Telezhnaya, Jan 10, 2018
  11. 10/18 cat-file: get rid of duplicate checkingOlga Telezhnaya, Jan 10, 2018
  12. 17/18 cat-file: move skip_object_info into ref-filterOlga Telezhnaya, Jan 10, 2018
  13. 05/18 cat-file: start migrating to ref-filterOlga Telezhnaya, Jan 10, 2018
  14. 09/18 cat-file: simplify expand_atom functionOlga Telezhnaya, Jan 10, 2018
  15. 13/18 cat-file: start reusing populate_valueOlga Telezhnaya, Jan 10, 2018
  16. 11/18 cat-file: start use ref_array_item structOlga Telezhnaya, Jan 10, 2018
  17. 06/18 ref-filter: reuse parse_ref_filter_atomOlga Telezhnaya, Jan 10, 2018
  18. 12/18 ref-filter: make populate_value globalOlga Telezhnaya, Jan 10, 2018
  19. 04/18 cat-file: move struct expand_data into ref-filterOlga Telezhnaya, Jan 10, 2018
  20. Jeff KingJan 15, 2018
  21. Оля ТележнаяJan 16, 2018
  22. Jeff KingJan 17, 2018
  23. Оля ТележнаяJan 18, 2018
  24. 03/18 ref-filter: make valid_atom as function parameterOlga Telezhnaya, Jan 10, 2018
  25. Jeff KingJan 15, 2018
  26. Оля ТележнаяJan 16, 2018
  27. Jeff KingJan 17, 2018
  28. Christian CouderJan 17, 2018
  29. Оля ТележнаяJan 18, 2018
  30. Оля ТележнаяJan 18, 2018
  31. Christian CouderJan 18, 2018
  32. Оля ТележнаяJan 19, 2018
  33. Christian CouderJan 19, 2018
  34. Christian CouderJan 19, 2018
  35. Оля ТележнаяJan 19, 2018
  36. Christian CouderJan 19, 2018
  37. Jeff KingJan 19, 2018
  38. Christian CouderJan 19, 2018
  39. Junio C HamanoJan 19, 2018
  40. Jeff KingJan 19, 2018
  41. Jeff KingJan 15, 2018
  42. Jeff KingJan 15, 2018
  43. Оля ТележнаяJan 16, 2018
  44. Jeff KingJan 17, 2018
  45. Christian CouderJan 17, 2018
  46. Оля ТележнаяJan 18, 2018
  47. Christian CouderJan 18, 2018

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