Merge from coreutils.

[gnulib.git] / lib / cycle-check.h

diff --git a/lib/cycle-check.h b/lib/cycle-check.h
index 0551bf2..b137a60 100644 (file)
--- a/lib/cycle-check.h
+++ b/lib/cycle-check.h
@@ -1,6 +1,6 @@
 /* help detect directory cycles efficiently
 
-   Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -30,6 +30,7 @@
 # endif
 # include <stdbool.h>
 # include "dev-ino.h"
+# include "same-inode.h"
 
 struct cycle_check_state
 {
@@ -41,4 +42,15 @@ struct cycle_check_state
 void cycle_check_init (struct cycle_check_state *state);
 bool cycle_check (struct cycle_check_state *state, struct stat const *sb);
 
+# define CYCLE_CHECK_REFLECT_CHDIR_UP(State, SB_dir, SB_subdir)        \
+  do                                                           \
+    {                                                          \
+      if (SAME_INODE ((State)->dev_ino, SB_subdir))            \
+       {                                                       \
+         (State)->dev_ino.st_dev = (SB_dir).st_dev;            \
+         (State)->dev_ino.st_ino = (SB_dir).st_ino;            \
+       }                                                       \
+    }                                                          \
+  while (0)
+
 #endif