frexpl: Update autoconf test.

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

diff --git a/lib/cycle-check.c b/lib/cycle-check.c
index 401dd86..3b48a9d 100644 (file)
--- a/lib/cycle-check.c
+++ b/lib/cycle-check.c
@@ -1,11 +1,11 @@
 /* help detect directory cycles efficiently
 
-   Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2003-2006, 2009-2011 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   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
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -13,15 +13,11 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; see the file COPYING.
-   If not, write to the Free Software Foundation,
-   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* Written by Jim Meyering */
 
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
 
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -33,10 +29,6 @@
 
 #include "cycle-check.h"
 
-#define SAME_INODE(Stat_buf_1, Stat_buf_2) \
-  ((Stat_buf_1).st_ino == (Stat_buf_2).st_ino \
-   && (Stat_buf_1).st_dev == (Stat_buf_2).st_dev)
-
 #define CC_MAGIC 9827862
 
 /* Return true if I is a power of 2, or is zero.  */
@@ -78,12 +70,12 @@ cycle_check (struct cycle_check_state *state, struct stat const *sb)
   if (is_zero_or_power_of_two (++(state->chdir_counter)))
     {
       /* On all architectures that we know about, if the counter
-        overflows then there is a directory cycle here somewhere,
-        even if we haven't detected it yet.  Typically this happens
-        only after the counter is incremented 2**64 times, so it's a
-        fairly theoretical point.  */
+         overflows then there is a directory cycle here somewhere,
+         even if we haven't detected it yet.  Typically this happens
+         only after the counter is incremented 2**64 times, so it's a
+         fairly theoretical point.  */
       if (state->chdir_counter == 0)
-       return true;
+        return true;
 
       state->dev_ino.st_dev = sb->st_dev;
       state->dev_ino.st_ino = sb->st_ino;