[PATCH v2 1/5] mailmap: add a function to inspect the number of entries

["brian m. carlson" <sandals@crustytoothpaste.net>]

We're soon going to change the type of our mailmap into an opaque struct
so we can add features and improve performance.  When we do so, it won't
be possible for users to inspect its internals to determine how many
items are present, so let's introduce a function that lets users inquire
how many objects are in the mailmap and use it where we want this
information.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
---
 mailmap.c | 5 +++++
 mailmap.h | 1 +
 pretty.c  | 2 +-
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/mailmap.c b/mailmap.c
index 962fd86d6d..c9a538f4e2 100644
--- a/mailmap.c
+++ b/mailmap.c
@@ -361,3 +361,8 @@ int map_user(struct string_list *map,
 	debug_mm("map_user:  --\n");
 	return 0;
 }
+
+int mailmap_entries(struct string_list *map)
+{
+	return map->nr;
+}
diff --git a/mailmap.h b/mailmap.h
index d0e65646cb..ff57b05a15 100644
--- a/mailmap.h
+++ b/mailmap.h
@@ -5,6 +5,7 @@ struct string_list;
 
 int read_mailmap(struct string_list *map, char **repo_abbrev);
 void clear_mailmap(struct string_list *map);
+int mailmap_entries(struct string_list *map);
 
 int map_user(struct string_list *map,
 			 const char **email, size_t *emaillen, const char **name, size_t *namelen);
diff --git a/pretty.c b/pretty.c
index 7a7708a0ea..43a0039870 100644
--- a/pretty.c
+++ b/pretty.c
@@ -681,7 +681,7 @@ static int mailmap_name(const char **email, size_t *email_len,
 		mail_map = xcalloc(1, sizeof(*mail_map));
 		read_mailmap(mail_map, NULL);
 	}
-	return mail_map->nr && map_user(mail_map, email, email_len, name, name_len);
+	return mailmap_entries(mail_map) && map_user(mail_map, email, email_len, name, name_len);
 }
 
 static size_t format_person_part(struct strbuf *sb, char part,