1 files changed, 21 insertions, 0 deletions
diff --git a/src/path.c b/src/path.c
index 078c26467a..bfd21b426c 100644
--- a/src/path.c
+++ b/src/path.c
@@ -1673,3 +1673,24 @@ int after_pathsep(char_u *b, char_u *p)
          && (!has_mbyte || (*mb_head_off)(b, p - 1) == 0);
 }
 
+/*
+ * Return TRUE if file names "f1" and "f2" are in the same directory.
+ * "f1" may be a short name, "f2" must be a full path.
+ */
+int same_directory(char_u *f1, char_u *f2)
+{
+  char_u ffname[MAXPATHL];
+  char_u      *t1;
+  char_u      *t2;
+
+  /* safety check */
+  if (f1 == NULL || f2 == NULL)
+    return FALSE;
+
+  (void)vim_FullName(f1, ffname, MAXPATHL, FALSE);
+  t1 = gettail_sep(ffname);
+  t2 = gettail_sep(f2);
+  return t1 - ffname == t2 - f2
+         && pathcmp((char *)ffname, (char *)f2, (int)(t1 - ffname)) == 0;
+}
+