[lib] hash compare function arguments ought to be const qualified

2008-08-14 Stephen Hemminger <stephen.hemminger@vyatta.com>

	* lib/hash.h: (struct hash) Hash comparator callback really
	  ought to treat storage behind arguments as constant - a compare
	  function with side-effects would be evil.
	* */*.c: Adjust comparator functions similarly, thus fixing at least
	  a few compiler warnings about const qualifier being dropped.

Signed-off-by: Paul Jakma <paul@quagga.net>

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/hash.h b/lib/hash.h
index a6e3d59a..f4b1c23e 100644
--- a/lib/hash.h
+++ b/lib/hash.h
@@ -48,16 +48,16 @@ struct hash
   unsigned int (*hash_key) (void *);
 
   /* Data compare function. */
-  int (*hash_cmp) (void *, void *);
+  int (*hash_cmp) (const void *, const void *);
 
   /* Backet alloc. */
   unsigned long count;
 };
 
 extern struct hash *hash_create (unsigned int (*) (void *), 
-                          int (*) (void *, void *));
+				 int (*) (const void *, const void *));
 extern struct hash *hash_create_size (unsigned int, unsigned int (*) (void *), 
-                                             int (*) (void *, void *));
+                                             int (*) (const void *, const void *));
 
 extern void *hash_get (struct hash *, void *, void * (*) (void *));
 extern void *hash_alloc_intern (void *);