Move offset_1st_component() to path.c

The implementation is also lightly modified to use is_dir_sep()
instead of hardcoding '/'.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/path.c b/path.c
index 79aa10471..06fd9e057 100644
--- a/path.c
+++ b/path.c
@@ -649,3 +649,10 @@ int daemon_avoid_alias(const char *p)
 		}
 	}
 }
+
+int offset_1st_component(const char *path)
+{
+	if (has_dos_drive_prefix(path))
+		return 2 + is_dir_sep(path[2]);
+	return is_dir_sep(path[0]);
+}