X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fcycle-check.c;h=011cae95dc29e7f7dc6df22edeeff3265e770bee;hb=0e1c6ff93f27c939ba9e0df945b16ef98eaaeef1;hp=401dd862f5f5d08535526b8d679dec3f0ced32e2;hpb=222b0486b7db1b09293e05512873d633440efcb3;p=gnulib.git

diff --git a/lib/cycle-check.c b/lib/cycle-check.c
index 401dd862f..011cae95d 100644
--- 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, 2009-2012 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.  */
@@ -58,7 +50,7 @@ cycle_check_init (struct cycle_check_state *state)
    descending chdir call, with SB corresponding to the chdir operand.
    If SB corresponds to a directory that has already been seen,
    return true to indicate that there is a directory cycle.
-   Note that this is done `lazily', which means that some of
+   Note that this is done "lazily", which means that some of
    the directories in the cycle may be processed twice before
    the cycle is detected.  */
 
@@ -73,17 +65,17 @@ cycle_check (struct cycle_check_state *state, struct stat const *sb)
   if (state->chdir_counter && SAME_INODE (*sb, state->dev_ino))
     return true;
 
-  /* If the number of `descending' chdir calls is a power of two,
+  /* If the number of "descending" chdir calls is a power of two,
      record the dev/ino of the current directory.  */
   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;