X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=commit.c;h=5b6e082c85f203cf27ac5b50f2d06a18b36fdc70;hb=3fc8284e2114624f2657142b3fecdc6f514b2090;hp=c6bf10d045a45a38352af0a7dc0b3732b7493182;hpb=4f12d529abbf233e1df93e7ffa5f2719005a2258;p=git.git

diff --git a/commit.c b/commit.c
index c6bf10d04..5b6e082c8 100644
--- a/commit.c
+++ b/commit.c
@@ -7,15 +7,15 @@ int save_commit_buffer = 1;
 struct sort_node
 {
 	/*
-         * the number of children of the associated commit
-         * that also occur in the list being sorted.
-         */
+	 * the number of children of the associated commit
+	 * that also occur in the list being sorted.
+	 */
 	unsigned int indegree;
 
 	/*
-         * reference to original list item that we will re-use
-         * on output.
-         */
+	 * reference to original list item that we will re-use
+	 * on output.
+	 */
 	struct commit_list * list_item;
 
 };
@@ -56,7 +56,7 @@ static struct commit *check_commit(struct object *obj,
 				   const unsigned char *sha1,
 				   int quiet)
 {
-	if (obj->type != TYPE_COMMIT) {
+	if (obj->type != OBJ_COMMIT) {
 		if (!quiet)
 			error("Object %s is a %s, not a commit",
 			      sha1_to_hex(sha1), typename(obj->type));
@@ -86,11 +86,11 @@ struct commit *lookup_commit(const unsigned char *sha1)
 	if (!obj) {
 		struct commit *ret = alloc_commit_node();
 		created_object(sha1, &ret->object);
-		ret->object.type = TYPE_COMMIT;
+		ret->object.type = OBJ_COMMIT;
 		return ret;
 	}
 	if (!obj->type)
-		obj->type = TYPE_COMMIT;
+		obj->type = OBJ_COMMIT;
 	return check_commit(obj, sha1, 0);
 }
 
@@ -123,7 +123,7 @@ static int commit_graft_pos(const unsigned char *sha1)
 	while (lo < hi) {
 		int mi = (lo + hi) / 2;
 		struct commit_graft *graft = commit_graft[mi];
-		int cmp = memcmp(sha1, graft->sha1, 20);
+		int cmp = hashcmp(sha1, graft->sha1);
 		if (!cmp)
 			return mi;
 		if (cmp < 0)
@@ -467,7 +467,8 @@ static int add_rfc2047(char *buf, const char *line, int len)
 	return bp - buf;
 }
 
-static int add_user_info(const char *what, enum cmit_fmt fmt, char *buf, const char *line)
+static int add_user_info(const char *what, enum cmit_fmt fmt, char *buf,
+			 const char *line, int relative_date)
 {
 	char *date;
 	int namelen;
@@ -507,14 +508,16 @@ static int add_user_info(const char *what, enum cmit_fmt fmt, char *buf, const c
 	}
 	switch (fmt) {
 	case CMIT_FMT_MEDIUM:
-		ret += sprintf(buf + ret, "Date:   %s\n", show_date(time, tz));
+		ret += sprintf(buf + ret, "Date:   %s\n",
+			       show_date(time, tz, relative_date));
 		break;
 	case CMIT_FMT_EMAIL:
 		ret += sprintf(buf + ret, "Date: %s\n",
 			       show_rfc2822_date(time, tz));
 		break;
 	case CMIT_FMT_FULLER:
-		ret += sprintf(buf + ret, "%sDate: %s\n", what, show_date(time, tz));
+		ret += sprintf(buf + ret, "%sDate: %s\n", what,
+			       show_date(time, tz, relative_date));
 		break;
 	default:
 		/* notin' */
@@ -557,7 +560,10 @@ static int add_merge_info(enum cmit_fmt fmt, char *buf, const struct commit *com
 	return offset;
 }
 
-unsigned long pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit, unsigned long len, char *buf, unsigned long space, int abbrev, const char *subject, const char *after_subject)
+unsigned long pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit,
+				  unsigned long len, char *buf, unsigned long space,
+				  int abbrev, const char *subject,
+				  const char *after_subject, int relative_date)
 {
 	int hdr = 1, body = 0;
 	unsigned long offset = 0;
@@ -646,15 +652,20 @@ unsigned long pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit
 			if (!memcmp(line, "author ", 7))
 				offset += add_user_info("Author", fmt,
 							buf + offset,
-							line + 7);
+							line + 7,
+							relative_date);
 			if (!memcmp(line, "committer ", 10) &&
 			    (fmt == CMIT_FMT_FULL || fmt == CMIT_FMT_FULLER))
 				offset += add_user_info("Commit", fmt,
 							buf + offset,
-							line + 10);
+							line + 10,
+							relative_date);
 			continue;
 		}
 
+		if (!subject)
+			body = 1;
+
 		if (is_empty_line(line, &linelen)) {
 			if (!body)
 				continue;
@@ -662,8 +673,6 @@ unsigned long pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit
 				continue;
 			if (fmt == CMIT_FMT_SHORT)
 				break;
-		} else {
-			body = 1;
 		}
 
 		if (subject) {
@@ -702,6 +711,12 @@ unsigned long pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit
 	/* Make sure there is an EOLN for the non-oneline case */
 	if (fmt != CMIT_FMT_ONELINE)
 		buf[offset++] = '\n';
+	/*
+	 * make sure there is another EOLN to separate the headers from whatever
+	 * body the caller appends if we haven't already written a body
+	 */
+	if (fmt == CMIT_FMT_EMAIL && !body)
+		buf[offset++] = '\n';
 	buf[offset] = '\0';
 	return offset;
 }
@@ -720,10 +735,10 @@ struct commit *pop_commit(struct commit_list **stack)
 
 int count_parents(struct commit * commit)
 {
-        int count = 0;
+        int count;
         struct commit_list * parents = commit->parents;
-        for (count=0;parents; parents=parents->next,count++)
-          ;
+        for (count = 0; parents; parents = parents->next,count++)
+		;
         return count;
 }
 
@@ -854,6 +869,7 @@ void sort_in_topological_order_fn(struct commit_list ** list, int lifo,
 #define PARENT1		(1u<< 8)
 #define PARENT2		(1u<< 9)
 #define STALE		(1u<<10)
+#define RESULT		(1u<<11)
 
 static struct commit *interesting(struct commit_list *list)
 {
@@ -867,183 +883,42 @@ static struct commit *interesting(struct commit_list *list)
 	return NULL;
 }
 
-/*
- * A pathological example of how this thing works.
- *
- * Suppose we had this commit graph, where chronologically
- * the timestamp on the commit are A <= B <= C <= D <= E <= F
- * and we are trying to figure out the merge base for E and F
- * commits.
- *
- *                  F
- *                 / \
- *            E   A   D
- *             \ /   /
- *              B   /
- *               \ /
- *                C
- *
- * First we push E and F to list to be processed.  E gets bit 1
- * and F gets bit 2.  The list becomes:
- *
- *     list=F(2) E(1), result=empty
- *
- * Then we pop F, the newest commit, from the list.  Its flag is 2.
- * We scan its parents, mark them reachable from the side that F is
- * reachable from, and push them to the list:
- *
- *     list=E(1) D(2) A(2), result=empty
- *
- * Next pop E and do the same.
- *
- *     list=D(2) B(1) A(2), result=empty
- *
- * Next pop D and do the same.
- *
- *     list=C(2) B(1) A(2), result=empty
- *
- * Next pop C and do the same.
- *
- *     list=B(1) A(2), result=empty
- *
- * Now it is B's turn.  We mark its parent, C, reachable from B's side,
- * and push it to the list:
- *
- *     list=C(3) A(2), result=empty
- *
- * Now pop C and notice it has flags==3.  It is placed on the result list,
- * and the list now contains:
- *
- *     list=A(2), result=C(3)
- *
- * We pop A and do the same.
- *
- *     list=B(3), result=C(3)
- *
- * Next, we pop B and something very interesting happens.  It has flags==3
- * so it is also placed on the result list, and its parents are marked
- * stale, retroactively, and placed back on the list:
- *
- *    list=C(7), result=C(7) B(3)
- *
- * Now, list does not have any interesting commit.  So we find the newest
- * commit from the result list that is not marked stale.  Which is
- * commit B.
- *
- *
- * Another pathological example how this thing used to fail to mark an
- * ancestor of a merge base as STALE before we introduced the
- * postprocessing phase (mark_reachable_commits).
- *
- *		  2
- *		  H
- *	    1    / \
- *	    G   A   \
- *	    |\ /     \
- *	    | B       \
- *	    |  \       \
- *	     \  C       F
- *	      \  \     /
- *	       \  D   /
- *		\ |  /
- *		 \| /
- *		  E
- *
- *	 list			A B C D E F G H
- *	 G1 H2			- - - - - - 1 2
- *	 H2 E1 B1		- 1 - - 1 - 1 2
- *	 F2 E1 B1 A2		2 1 - - 1 2 1 2
- *	 E3 B1 A2		2 1 - - 3 2 1 2
- *	 B1 A2			2 1 - - 3 2 1 2
- *	 C1 A2			2 1 1 - 3 2 1 2
- *	 D1 A2			2 1 1 1 3 2 1 2
- *	 A2			2 1 1 1 3 2 1 2
- *	 B3			2 3 1 1 3 2 1 2
- *	 C7			2 3 7 1 3 2 1 2
- *
- * At this point, unfortunately, everybody in the list is
- * stale, so we fail to complete the following two
- * steps to fully marking stale commits.
- *
- *	 D7			2 3 7 7 3 2 1 2
- *	 E7			2 3 7 7 7 2 1 2
- *
- * and we ended up showing E as an interesting merge base.
- * The postprocessing phase re-injects C and continues traversal
- * to contaminate D and E.
- */
-
-static void mark_reachable_commits(struct commit_list *result,
-				   struct commit_list *list)
-{
-	struct commit_list *tmp;
-
-	/*
-	 * Postprocess to fully contaminate the well.
-	 */
-	for (tmp = result; tmp; tmp = tmp->next) {
-		struct commit *c = tmp->item;
-		/* Reinject stale ones to list,
-		 * so we can scan their parents.
-		 */
-		if (c->object.flags & STALE)
-			commit_list_insert(c, &list);
-	}
-	while (list) {
-		struct commit *c = list->item;
-		struct commit_list *parents;
-
-		tmp = list;
-		list = list->next;
-		free(tmp);
-
-		/* Anything taken out of the list is stale, so
-		 * mark all its parents stale.  We do not
-		 * parse new ones (we already parsed all the relevant
-		 * ones).
-		 */
-		parents = c->parents;
-		while (parents) {
-			struct commit *p = parents->item;
-			parents = parents->next;
-			if (!(p->object.flags & STALE)) {
-				p->object.flags |= STALE;
-				commit_list_insert(p, &list);
-			}
-		}
-	}
-}
-
-struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2,
-                                    int cleanup)
+static struct commit_list *merge_bases(struct commit *one, struct commit *two)
 {
 	struct commit_list *list = NULL;
 	struct commit_list *result = NULL;
-	struct commit_list *tmp = NULL;
 
-	if (rev1 == rev2)
-		return commit_list_insert(rev1, &result);
+	if (one == two)
+		/* We do not mark this even with RESULT so we do not
+		 * have to clean it up.
+		 */
+		return commit_list_insert(one, &result);
 
-	parse_commit(rev1);
-	parse_commit(rev2);
+	parse_commit(one);
+	parse_commit(two);
 
-	rev1->object.flags |= PARENT1;
-	rev2->object.flags |= PARENT2;
-	insert_by_date(rev1, &list);
-	insert_by_date(rev2, &list);
+	one->object.flags |= PARENT1;
+	two->object.flags |= PARENT2;
+	insert_by_date(one, &list);
+	insert_by_date(two, &list);
 
 	while (interesting(list)) {
-		struct commit *commit = list->item;
+		struct commit *commit;
 		struct commit_list *parents;
-		int flags = commit->object.flags
-			& (PARENT1 | PARENT2 | STALE);
+		struct commit_list *n;
+		int flags;
 
-		tmp = list;
-		list = list->next;
-		free(tmp);
-		if (flags == (PARENT1 | PARENT2)) {
-			insert_by_date(commit, &result);
+		commit = list->item;
+		n = list->next;
+		free(list);
+		list = n;
 
+		flags = commit->object.flags & (PARENT1 | PARENT2 | STALE);
+		if (flags == (PARENT1 | PARENT2)) {
+			if (!(commit->object.flags & RESULT)) {
+				commit->object.flags |= RESULT;
+				insert_by_date(commit, &result);
+			}
 			/* Mark parents of a found merge stale */
 			flags |= STALE;
 		}
@@ -1059,35 +934,75 @@ struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2,
 		}
 	}
 
-	if (!result)
-		goto finish;
-
-	if (result->next && list)
-		mark_reachable_commits(result, list);
-
-	/* cull duplicates */
-	for (tmp = result, list = NULL; tmp; ) {
-		struct commit *commit = tmp->item;
-		struct commit_list *next = tmp->next;
-		if (commit->object.flags & STALE) {
-			if (list != NULL)
-				list->next = next;
-			free(tmp);
-		} else {
-			if (list == NULL)
-				result = tmp;
-			list = tmp;
-			commit->object.flags |= STALE;
-		}
+	/* Clean up the result to remove stale ones */
+	list = result; result = NULL;
+	while (list) {
+		struct commit_list *n = list->next;
+		if (!(list->item->object.flags & STALE))
+			insert_by_date(list->item, &result);
+		free(list);
+		list = n;
+	}
+	return result;
+}
 
-		tmp = next;
+struct commit_list *get_merge_bases(struct commit *one,
+				    struct commit *two,
+                                    int cleanup)
+{
+	const unsigned all_flags = (PARENT1 | PARENT2 | STALE | RESULT);
+	struct commit_list *list;
+	struct commit **rslt;
+	struct commit_list *result;
+	int cnt, i, j;
+
+	result = merge_bases(one, two);
+	if (one == two)
+		return result;
+	if (!result || !result->next) {
+		if (cleanup) {
+			clear_commit_marks(one, all_flags);
+			clear_commit_marks(two, all_flags);
+		}
+		return result;
 	}
 
- finish:
-	if (cleanup) {
-		clear_commit_marks(rev1, PARENT1 | PARENT2 | STALE);
-		clear_commit_marks(rev2, PARENT1 | PARENT2 | STALE);
+	/* There are more than one */
+	cnt = 0;
+	list = result;
+	while (list) {
+		list = list->next;
+		cnt++;
+	}
+	rslt = xcalloc(cnt, sizeof(*rslt));
+	for (list = result, i = 0; list; list = list->next)
+		rslt[i++] = list->item;
+	free_commit_list(result);
+
+	clear_commit_marks(one, all_flags);
+	clear_commit_marks(two, all_flags);
+	for (i = 0; i < cnt - 1; i++) {
+		for (j = i+1; j < cnt; j++) {
+			if (!rslt[i] || !rslt[j])
+				continue;
+			result = merge_bases(rslt[i], rslt[j]);
+			clear_commit_marks(rslt[i], all_flags);
+			clear_commit_marks(rslt[j], all_flags);
+			for (list = result; list; list = list->next) {
+				if (rslt[i] == list->item)
+					rslt[i] = NULL;
+				if (rslt[j] == list->item)
+					rslt[j] = NULL;
+			}
+		}
 	}
 
+	/* Surviving ones in rslt[] are the independent results */
+	result = NULL;
+	for (i = 0; i < cnt; i++) {
+		if (rslt[i])
+			insert_by_date(rslt[i], &result);
+	}
+	free(rslt);
 	return result;
 }