[4/4] Make merge-base use dates to find answer

From

Daniel Barkalow <barkalow@iabervon.org>

Date

Apr 19, 2005, 02:00 UTC

Message-ID

<Pine.LNX.4.21.0504182157370.30848-100000@iabervon.org>

In-Reply-To

<Pine.LNX.4.21.0504182139250.30848-100000@iabervon.org>

Signed-Off-By: Daniel Barkalow <barkalow@iabervon.org>

Index: merge-base.c
===================================================================
--- fb7b671eb0da01b9a9998ab58b3717da9f983456/merge-base.c  (mode:100644 sha1:414ff419c679dba122b2f21b698c1e2c8abdd965)
+++ 7e5a0d93117ecadfb15de3a6bebdb1aa94234fde/merge-base.c  (mode:100644 sha1:61e408e5d158f3dde6153ccbe9ee6fbbf1136225)
@@ -5,42 +5,30 @@
 static struct commit *process_list(struct commit_list **list_p, int this_mark,
 				   int other_mark)
 {
-	struct commit_list *parent, *temp;
-	struct commit_list *posn = *list_p;
-	*list_p = NULL;
-	while (posn) {
-		parse_commit(posn->item);
-		if (posn->item->object.flags & this_mark) {
-			/*
-			  printf("%d already seen %s %x\n",
-			  this_mark
-			  sha1_to_hex(posn->parent->sha1),
-			  posn->parent->flags);
-			*/
-			/* do nothing; this indicates that this side
-			 * split and reformed, and we only need to
-			 * mark it once.
-			 */
-		} else if (posn->item->object.flags & other_mark) {
-			return posn->item;
-		} else {
-			/*
-			  printf("%d based on %s\n",
-			  this_mark,
-			  sha1_to_hex(posn->parent->sha1));
-			*/
-			posn->item->object.flags |= this_mark;
-			
-			parent = posn->item->parents;
-			while (parent) {
-				temp = malloc(sizeof(struct commit_list));
-				temp->next = *list_p;
-				temp->item = parent->item;
-				*list_p = temp;
-				parent = parent->next;
-			}
-		}
-		posn = posn->next;
+	struct commit *item = (*list_p)->item;
+	
+	if (item->object.flags & this_mark) {
+		/*
+		  printf("%d already seen %s %x\n",
+		  this_mark
+		  sha1_to_hex(posn->parent->sha1),
+		  posn->parent->flags);
+		*/
+		/* do nothing; this indicates that this side
+		 * split and reformed, and we only need to
+		 * mark it once.
+		 */
+		*list_p = (*list_p)->next;
+	} else if (item->object.flags & other_mark) {
+		return item;
+	} else {
+		/*
+		  printf("%d based on %s\n",
+		  this_mark,
+		  sha1_to_hex(posn->parent->sha1));
+		*/
+		pop_most_recent_commit(list_p);
+		item->object.flags |= this_mark;
 	}
 	return NULL;
 }
@@ -56,16 +44,27 @@
 	rev2list->item = rev2;
 	rev2list->next = NULL;
 
+	parse_commit(rev1);
+	parse_commit(rev2);
+
 	while (rev1list || rev2list) {
 		struct commit *ret;
-		ret = process_list(&rev1list, 0x1, 0x2);
-		if (ret) {
-			/* XXXX free lists */
-			return ret;
+		if (!rev1list) {
+			// process 2
+			ret = process_list(&rev2list, 0x2, 0x1);
+		} else if (!rev2list) {
+			// process 1
+			ret = process_list(&rev1list, 0x1, 0x2);
+		} else if (rev1list->item->date < rev2list->item->date) {
+			// process 2
+			ret = process_list(&rev2list, 0x2, 0x1);
+		} else {
+			// process 1
+			ret = process_list(&rev1list, 0x1, 0x2);
 		}
-		ret = process_list(&rev2list, 0x2, 0x1);
 		if (ret) {
-			/* XXXX free lists */
+			free_commit_list(rev1list);
+			free_commit_list(rev2list);
 			return ret;
 		}
 	}