[PATCH 07/17] unpack-trees: split traverse_trees() code into a separate function

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 unpack-trees.c |   64 ++++++++++++++++++++++++++++++-------------------------
 1 files changed, 35 insertions(+), 29 deletions(-)

diff --git a/unpack-trees.c b/unpack-trees.c
index 3c7a7c9..4889e24 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -792,6 +792,39 @@ static int unpack_callback(int n, unsigned long mask, unsigned long dirmask, str
 	return mask;
 }
 
+static int unpack_traverse(unsigned len, struct tree_desc *t, struct unpack_trees_options *o)
+{
+	const char *prefix = o->prefix ? o->prefix : "";
+	struct traverse_info info;
+
+	if (!len)
+		return 0;
+
+	setup_traverse_info(&info, prefix);
+	info.fn = unpack_callback;
+	info.data = o;
+	info.show_all_errors = o->show_all_errors;
+
+	if (o->prefix) {
+		/*
+		 * Unpack existing index entries that sort before the
+		 * prefix the tree is spliced into.  Note that o->merge
+		 * is always true in this case.
+		 */
+		while (1) {
+			struct cache_entry *ce = next_cache_entry(o);
+			if (!ce)
+				break;
+			if (ce_in_traverse_path(ce, &info))
+				break;
+			if (unpack_index_entry(ce, o) < 0)
+				return 1;
+		}
+	}
+
+	return traverse_trees(len, t, &info) < 0;
+}
+
 /*
  * N-way merge "len" trees.  Returns 0 on success, -1 on failure to manipulate the
  * resulting index, -2 on failure to reflect the changes to the work tree.
@@ -831,35 +864,8 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options
 		dfc = xcalloc(1, cache_entry_size(0));
 	o->df_conflict_entry = dfc;
 
-	if (len) {
-		const char *prefix = o->prefix ? o->prefix : "";
-		struct traverse_info info;
-
-		setup_traverse_info(&info, prefix);
-		info.fn = unpack_callback;
-		info.data = o;
-		info.show_all_errors = o->show_all_errors;
-
-		if (o->prefix) {
-			/*
-			 * Unpack existing index entries that sort before the
-			 * prefix the tree is spliced into.  Note that o->merge
-			 * is always true in this case.
-			 */
-			while (1) {
-				struct cache_entry *ce = next_cache_entry(o);
-				if (!ce)
-					break;
-				if (ce_in_traverse_path(ce, &info))
-					break;
-				if (unpack_index_entry(ce, o) < 0)
-					goto return_failed;
-			}
-		}
-
-		if (traverse_trees(len, t, &info) < 0)
-			goto return_failed;
-	}
+	if (unpack_traverse(len, t, o))
+		goto return_failed;
 
 	/* Any left-over entries in the index? */
 	if (o->merge) {
-- 
1.7.1.rc1.69.g24c2f7