ls-tree: introduce struct "show_tree_data"

"show_tree_data" is a struct that packages the necessary fields for
"show_tree()". This commit is a pre-prepared commit for supporting
"--format" option and it does not affect any existing functionality.

Signed-off-by: Ævar Arnfjörð Bjarmason <[email protected]>
Signed-off-by: Teng Long <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: avar

builtin/ls-tree.c

@@ -23,6 +23,13 @@ static int ls_options;
 static struct pathspec pathspec;
 static int chomp_prefix;
 static const char *ls_tree_prefix;
+struct show_tree_data {
+	unsigned mode;
+	enum object_type type;
+	const struct object_id *oid;
+	const char *pathname;
+	struct strbuf *base;
+};
 
 static const  char * const ls_tree_usage[] = {
 	N_("git ls-tree [<options>] <tree-ish> [<path>...]"),
@@ -64,36 +71,34 @@ static int show_recursive(const char *base, size_t baselen, const char *pathname
 	return 0;
 }
 
-static int show_default(const struct object_id *oid, enum object_type type,
-			const char *pathname, unsigned mode,
-			struct strbuf *base)
+static int show_default(struct show_tree_data *data)
 {
-	size_t baselen = base->len;
+	size_t baselen = data->base->len;
 
 	if (cmdmode == MODE_LONG) {
 		char size_text[24];
-		if (type == OBJ_BLOB) {
+		if (data->type == OBJ_BLOB) {
 			unsigned long size;
-			if (oid_object_info(the_repository, oid, &size) == OBJ_BAD)
+			if (oid_object_info(the_repository, data->oid, &size) == OBJ_BAD)
 				xsnprintf(size_text, sizeof(size_text), "BAD");
 			else
 				xsnprintf(size_text, sizeof(size_text),
 					  "%" PRIuMAX, (uintmax_t)size);
 		} else {
 			xsnprintf(size_text, sizeof(size_text), "-");
 		}
-		printf("%06o %s %s %7s\t", mode, type_name(type),
-		find_unique_abbrev(oid, abbrev), size_text);
+		printf("%06o %s %s %7s\t", data->mode, type_name(data->type),
+		find_unique_abbrev(data->oid, abbrev), size_text);
 	} else {
-		printf("%06o %s %s\t", mode, type_name(type),
-		find_unique_abbrev(oid, abbrev));
+		printf("%06o %s %s\t", data->mode, type_name(data->type),
+		find_unique_abbrev(data->oid, abbrev));
 	}
-	baselen = base->len;
-	strbuf_addstr(base, pathname);
-	write_name_quoted_relative(base->buf,
+	baselen = data->base->len;
+	strbuf_addstr(data->base, data->pathname);
+	write_name_quoted_relative(data->base->buf,
 				   chomp_prefix ? ls_tree_prefix : NULL, stdout,
 				   line_termination);
-	strbuf_setlen(base, baselen);
+	strbuf_setlen(data->base, baselen);
 	return 1;
 }
 
@@ -103,6 +108,13 @@ static int show_tree(const struct object_id *oid, struct strbuf *base,
 	int recurse = 0;
 	size_t baselen;
 	enum object_type type = object_type(mode);
+	struct show_tree_data data = {
+		.mode = mode,
+		.type = type,
+		.oid = oid,
+		.pathname = pathname,
+		.base = base,
+	};
 
 	if (type == OBJ_BLOB) {
 		if (ls_options & LS_TREE_ONLY)
@@ -128,7 +140,7 @@ static int show_tree(const struct object_id *oid, struct strbuf *base,
 		(!ls_options || (ls_options & LS_RECURSIVE)
 		 || (ls_options & LS_SHOW_TREES)
 		 || (ls_options & LS_TREE_ONLY)))
-			 show_default(oid, type, pathname, mode, base);
+			 show_default(&data);
 
 	return recurse;
 }