[PATCH] Add file addition/deletion indicator in diffstat

[pclouds@gmail.com]

For new files, " (new)" will be appended to filenames.
For deleted files, " (deleted)" will be appended to filenames.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c |   29 +++++++++++++++++++++++++++++
 1 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/diff.c b/diff.c
index 3315378..bd78138 100644
--- a/diff.c
+++ b/diff.c
@@ -599,6 +599,8 @@ struct diffstat_t {
 		unsigned is_unmerged:1;
 		unsigned is_binary:1;
 		unsigned is_renamed:1;
+		unsigned is_added:1;
+		unsigned is_deleted:1;
 		unsigned int added, deleted;
 	} **files;
 };
@@ -707,6 +709,10 @@ static void show_stats(struct diffstat_t
 		}
 
 		len = strlen(file->name);
+		if (file->is_added)
+			len += 6; /* " (new)" */
+		if (file->is_deleted)
+			len += 10; /* " (deleted)" */
 		if (max_len < len)
 			max_len = len;
 
@@ -735,12 +741,25 @@ static void show_stats(struct diffstat_t
 		int added = data->files[i]->added;
 		int deleted = data->files[i]->deleted;
 		int name_len;
+		char *new_name = NULL;
 
 		/*
 		 * "scale" the filename
 		 */
 		len = name_width;
 		name_len = strlen(name);
+		if (data->files[i]->is_added) {
+			new_name = name = xmalloc(name_len+7);  /* " (new)" */
+			memcpy(name,data->files[i]->name,name_len);
+			memcpy(name+name_len," (new)",7);
+			name_len += 6;
+		}
+		if (data->files[i]->is_deleted) {
+			new_name = name = xmalloc(name_len+11);  /* " (deleted)" */
+			memcpy(name,data->files[i]->name,name_len);
+			memcpy(name+name_len," (deleted)",11);
+			name_len += 10; /* " (deleted)" */
+		}
 		if (name_width < name_len) {
 			char *slash;
 			prefix = "...";
@@ -787,6 +806,8 @@ static void show_stats(struct diffstat_t
 		show_graph('-', del, del_c, reset);
 		putchar('\n');
 	free_diffstat_file:
+		if (new_name)
+			free(new_name);
 		free(data->files[i]->name);
 		free(data->files[i]);
 	}
@@ -1067,6 +1088,14 @@ static void builtin_diffstat(const char
 		data->is_unmerged = 1;
 		return;
 	}
+	if (DIFF_FILE_VALID(one)) {
+		if (!DIFF_FILE_VALID(two))
+			data->is_deleted = 1;
+	}
+	else {
+		if (DIFF_FILE_VALID(two))
+			data->is_added = 1;
+	}
 	if (complete_rewrite) {
 		diff_populate_filespec(one, 0);
 		diff_populate_filespec(two, 0);
--