decorate: refactor format_decorations()

Rename the format_decorations_extended function to format_decorations
and drop the format_decorations wrapper macro. Pass the prefix, suffix
and separator strings as a single 'struct format_decorations' pointer
argument instead of separate arguments. Use default values defined in
the function when either the struct pointer or any of the struct fields
are NULL. This is to ease extension with additional options.

Signed-off-by: Andy Koppe <andy.koppe@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 8 insertions, 7 deletions

diff --git a/log-tree.h b/log-tree.h
index bdb6432815..14898de8ac 100644
--- a/log-tree.h
+++ b/log-tree.h
@@ -13,17 +13,18 @@ struct decoration_filter {
 	struct string_list *exclude_ref_config_pattern;
 };
 
+struct decoration_options {
+	char *prefix;
+	char *suffix;
+	char *separator;
+};
+
 int parse_decorate_color_config(const char *var, const char *slot_name, const char *value);
 int log_tree_diff_flush(struct rev_info *);
 int log_tree_commit(struct rev_info *, struct commit *);
 void show_log(struct rev_info *opt);
-void format_decorations_extended(struct strbuf *sb, const struct commit *commit,
-			     int use_color,
-			     const char *prefix,
-			     const char *separator,
-			     const char *suffix);
-#define format_decorations(strbuf, commit, color) \
-			     format_decorations_extended((strbuf), (commit), (color), " (", ", ", ")")
+void format_decorations(struct strbuf *sb, const struct commit *commit,
+			int use_color, const struct decoration_options *opts);
 void show_decorations(struct rev_info *opt, struct commit *commit);
 void log_write_email_headers(struct rev_info *opt, struct commit *commit,
 			     const char **extra_headers_p,