From 740659519e0b30bc6b64f00ba69825294c40db07 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <junkio@cox.net>
Date: Tue, 11 Apr 2006 14:31:31 -0700
Subject: [PATCH] combine-diff: fix hunks at the end (take #2).

The previous round showed the delete-only hunks at the end, but
forgot to mark them interesting when they were.

Signed-off-by: Junio C Hamano <junkio@cox.net>
---
 combine-diff.c | 49 +++++++++++++++++++++----------------------------
 1 file changed, 21 insertions(+), 28 deletions(-)

diff --git a/combine-diff.c b/combine-diff.c
index 672262a5ba..c45d773659 100644
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -301,14 +301,14 @@ static unsigned long find_next(struct sline *sline,
 	 * lines that are not interesting to interesting() function
 	 * that are surrounded by interesting() ones.
 	 */
-	while (i < cnt)
+	while (i <= cnt)
 		if (uninteresting
 		    ? !(sline[i].flag & mark)
 		    : (sline[i].flag & mark))
 			return i;
 		else
 			i++;
-	return cnt;
+	return i;
 }
 
 static int give_context(struct sline *sline, unsigned long cnt, int num_parent)
@@ -327,10 +327,10 @@ static int give_context(struct sline *sline, unsigned long cnt, int num_parent)
 	 * lines but they are treated as "interesting" in the end.
 	 */
 	i = find_next(sline, mark, 0, cnt, 0);
-	if (cnt <= i)
+	if (cnt < i)
 		return 0;
 
-	while (i < cnt) {
+	while (i <= cnt) {
 		unsigned long j = (context < i) ? (i - context) : 0;
 		unsigned long k;
 
@@ -343,7 +343,7 @@ static int give_context(struct sline *sline, unsigned long cnt, int num_parent)
 		 * next uninteresting one start?
 		 */
 		j = find_next(sline, mark, i, cnt, 1);
-		if (cnt <= j)
+		if (cnt < j)
 			break; /* the rest are all interesting */
 
 		/* lookahead context lines */
@@ -365,7 +365,7 @@ static int give_context(struct sline *sline, unsigned long cnt, int num_parent)
 		 * the trailing edge a bit.
 		 */
 		i = k;
-		k = (j + context < cnt) ? j + context : cnt;
+		k = (j + context < cnt+1) ? j + context : cnt+1;
 		while (j < k)
 			sline[j++].flag |= mark;
 	}
@@ -380,7 +380,7 @@ static int make_hunks(struct sline *sline, unsigned long cnt,
 	unsigned long i;
 	int has_interesting = 0;
 
-	for (i = 0; i < cnt; i++) {
+	for (i = 0; i <= cnt; i++) {
 		if (interesting(&sline[i], all_mask))
 			sline[i].flag |= mark;
 		else
@@ -394,15 +394,15 @@ static int make_hunks(struct sline *sline, unsigned long cnt,
 	 * parent, mark that uninteresting.
 	 */
 	i = 0;
-	while (i < cnt) {
+	while (i <= cnt) {
 		unsigned long j, hunk_begin, hunk_end;
 		unsigned long same_diff;
-		while (i < cnt && !(sline[i].flag & mark))
+		while (i <= cnt && !(sline[i].flag & mark))
 			i++;
-		if (cnt <= i)
+		if (cnt < i)
 			break; /* No more interesting hunks */
 		hunk_begin = i;
-		for (j = i + 1; j < cnt; j++) {
+		for (j = i + 1; j <= cnt; j++) {
 			if (!(sline[j].flag & mark)) {
 				/* Look beyond the end to see if there
 				 * is an interesting line after this
@@ -412,8 +412,8 @@ static int make_hunks(struct sline *sline, unsigned long cnt,
 				int contin = 0;
 				la = adjust_hunk_tail(sline, all_mask,
 						     hunk_begin, j);
-				la = (la + context < cnt) ?
-					(la + context) : cnt;
+				la = (la + context < cnt + 1) ?
+					(la + context) : cnt + 1;
 				while (j <= --la) {
 					if (sline[la].flag & mark) {
 						contin = 1;
@@ -507,30 +507,23 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent)
 	while (1) {
 		struct sline *sl = &sline[lno];
 		int hunk_end;
-		while (lno < cnt && !(sline[lno].flag & mark))
+		int rlines;
+		while (lno <= cnt && !(sline[lno].flag & mark))
 			lno++;
 		if (cnt < lno)
 			break;
-		else if (cnt == lno) {
-			/* See if there is anything interesting */
-			struct lline *ll;
-			for (ll = sline[lno].lost_head; ll; ll = ll->next)
-				if (ll->parent_map)
-					break;
-			if (!ll)
-				break;
-			hunk_end = cnt + 1;
-		}
 		else {
-			for (hunk_end = lno + 1; hunk_end < cnt; hunk_end++)
+			for (hunk_end = lno + 1; hunk_end <= cnt; hunk_end++)
 				if (!(sline[hunk_end].flag & mark))
 					break;
 		}
+		rlines = hunk_end - lno;
+		if (cnt < hunk_end)
+			rlines--; /* pointing at the last delete hunk */
 		for (i = 0; i <= num_parent; i++) putchar(combine_marker);
 		for (i = 0; i < num_parent; i++)
 			show_parent_lno(sline, lno, hunk_end, cnt, i);
-		printf(" +%lu,%lu ", lno+1,
-		       (cnt == lno) ? 0 : hunk_end - lno);
+		printf(" +%lu,%lu ", lno+1, rlines);
 		for (i = 0; i <= num_parent; i++) putchar(combine_marker);
 		putchar('\n');
 		while (lno < hunk_end) {
@@ -549,7 +542,7 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent)
 				puts(ll->line);
 				ll = ll->next;
 			}
-			if (cnt <= lno)
+			if (cnt < lno)
 				break;
 			p_mask = 1;
 			for (j = 0; j < num_parent; j++) {