Use proper types for hash/assoc functions in `hashtab.h'.

[bpt/guile.git] / libguile / hashtab.h

diff --git a/libguile/hashtab.h b/libguile/hashtab.h
index 005fd57..f72e8ab 100644 (file)
--- a/libguile/hashtab.h
+++ b/libguile/hashtab.h
@@ -3,21 +3,22 @@
 #ifndef SCM_HASHTAB_H
 #define SCM_HASHTAB_H
 
-/* Copyright (C) 1995,1996,1999,2000,2001, 2003, 2004, 2006, 2008 Free Software Foundation, Inc.
+/* Copyright (C) 1995,1996,1999,2000,2001, 2003, 2004, 2006, 2008, 2009 Free Software Foundation, Inc.
  *
  * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 3 of
+ * the License, or (at your option) any later version.
  *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
  */
 
 \f
@@ -63,6 +64,14 @@ SCM_API scm_t_bits scm_tc16_hashtable;
 #define SCM_SET_HASHTABLE_BUCKET(h, i, x) \
   SCM_SIMPLE_VECTOR_SET (SCM_HASHTABLE_VECTOR (h), i, x)
 
+/* Function that computes a hash of OBJ modulo MAX.  */
+typedef unsigned long (*scm_t_hash_fn) (SCM obj, unsigned long max,
+                                       void *closure);
+
+/* Function that returns the value associated with OBJ in ALIST according to
+   some equality predicate.  */
+typedef SCM (*scm_t_assoc_fn) (SCM obj, SCM alist, void *closure);
+
 typedef struct scm_t_hashtable {
   int flags;                   /* properties of table */
   unsigned long n_items;       /* number of items in table */
@@ -70,7 +79,7 @@ typedef struct scm_t_hashtable {
   unsigned long upper;         /* when to grow */
   int size_index;              /* index into hashtable_size */
   int min_size_index;          /* minimum size_index */
-  unsigned long (*hash_fn) ();  /* for rehashing after a GC. */
+  scm_t_hash_fn hash_fn;  /* for rehashing after a GC. */
 } scm_t_hashtable;
 
 \f
@@ -93,14 +102,30 @@ SCM_API SCM scm_weak_key_hash_table_p (SCM h);
 SCM_API SCM scm_weak_value_hash_table_p (SCM h);
 SCM_API SCM scm_doubly_weak_hash_table_p (SCM h);
 
-SCM_INTERNAL void scm_i_rehash (SCM table, unsigned long (*hash_fn)(),
+SCM_INTERNAL void scm_i_rehash (SCM table, scm_t_hash_fn hash_fn,
                                void *closure, const char *func_name);
 
-SCM_API SCM scm_hash_fn_get_handle (SCM table, SCM obj, unsigned long (*hash_fn) (), SCM (*assoc_fn) (), void * closure);
-SCM_API SCM scm_hash_fn_create_handle_x (SCM table, SCM obj, SCM init, unsigned long (*hash_fn) (), SCM (*assoc_fn) (), void * closure);
-SCM_API SCM scm_hash_fn_ref (SCM table, SCM obj, SCM dflt, unsigned long (*hash_fn) (), SCM (*assoc_fn) (), void * closure);
-SCM_API SCM scm_hash_fn_set_x (SCM table, SCM obj, SCM val, unsigned long (*hash_fn) (), SCM (*assoc_fn) (), void * closure);
-SCM_API SCM scm_hash_fn_remove_x (SCM table, SCM obj, unsigned long (*hash_fn) (), SCM (*assoc_fn) (), void * closure);
+
+SCM_API SCM scm_hash_fn_get_handle (SCM table, SCM obj,
+                                   scm_t_hash_fn hash_fn,
+                                   scm_t_assoc_fn assoc_fn,
+                                   void *closure);
+SCM_API SCM scm_hash_fn_create_handle_x (SCM table, SCM obj, SCM init,
+                                        scm_t_hash_fn hash_fn,
+                                        scm_t_assoc_fn assoc_fn,
+                                        void *closure);
+SCM_API SCM scm_hash_fn_ref (SCM table, SCM obj, SCM dflt,
+                            scm_t_hash_fn hash_fn,
+                            scm_t_assoc_fn assoc_fn,
+                            void *closure);
+SCM_API SCM scm_hash_fn_set_x (SCM table, SCM obj, SCM val,
+                              scm_t_hash_fn hash_fn,
+                              scm_t_assoc_fn assoc_fn,
+                              void *closure);
+SCM_API SCM scm_hash_fn_remove_x (SCM table, SCM obj,
+                                 scm_t_hash_fn hash_fn,
+                                 scm_t_assoc_fn assoc_fn,
+                                 void *closure);
 SCM_API SCM scm_internal_hash_fold (SCM (*fn) (), void *closure, SCM init, SCM table);
 SCM_API void scm_internal_hash_for_each_handle (SCM (*fn) (), void *closure, SCM table);
 SCM_API SCM scm_hash_clear_x (SCM table);