merge from gcc

1 files changed, 64 insertions, 45 deletions

diff --git a/include/hashtab.h b/include/hashtab.h
index 3990c14..5fe2393 100644
--- a/include/hashtab.h
+++ b/include/hashtab.h
@@ -38,69 +38,88 @@ extern "C" {
 
 #include <ansidecl.h>
 
-/* The hash table element is represented by the following type. */
-
-typedef const void *hash_table_entry_t;
+/* Callback function pointer types.  */
+
+/* Calculate hash of a table entry.  */
+typedef unsigned int (*htab_hash) PARAMS ((const void *));
+
+/* Compare a table entry with a possible entry.  The entry already in
+   the table always comes first, so the second element can be of a
+   different type (but in this case htab_find and htab_find_slot
+   cannot be used; instead the variants that accept a hash value
+   must be used).  */
+typedef int (*htab_eq) PARAMS ((const void *, const void *));
+
+/* Cleanup function called whenever a live element is removed from
+   the hash table.  */
+typedef void (*htab_del) PARAMS ((void *));
+  
+/* Function called by htab_traverse for each live element.  The first
+   arg is the slot of the element (which can be passed to htab_clear_slot
+   if desired), the second arg is the auxiliary pointer handed to
+   htab_traverse.  Return 1 to continue scan, 0 to stop.  */
+typedef int (*htab_trav) PARAMS ((void **, void *));
 
 /* Hash tables are of the following type.  The structure
    (implementation) of this type is not needed for using the hash
    tables.  All work with hash table should be executed only through
    functions mentioned below. */
 
-typedef struct hash_table
+struct htab
 {
-  /* Current size (in entries) of the hash table */
-  size_t size;
-  /* Current number of elements including also deleted elements */
-  size_t number_of_elements;
-  /* Current number of deleted elements in the table */
-  size_t number_of_deleted_elements;
-  /* The following member is used for debugging. Its value is number
-     of all calls of `find_hash_table_entry' for the hash table. */
-  int searches;
-  /* The following member is used for debugging.  Its value is number
-     of collisions fixed for time of work with the hash table. */
-  int collisions;
-  /* Pointer to function for evaluation of hash value (any unsigned value).
-     This function has one parameter of type hash_table_entry_t. */
-  unsigned (*hash_function) PARAMS ((hash_table_entry_t));
-  /* Pointer to function for test on equality of hash table elements (two
-     parameter of type hash_table_entry_t. */
-  int (*eq_function) PARAMS ((hash_table_entry_t, hash_table_entry_t));
-  /* Table itself */
-  hash_table_entry_t *entries;
-} *hash_table_t;
-
+  /* Pointer to hash function.  */
+  htab_hash hash_f;
 
-/* The prototypes of the package functions. */
+  /* Pointer to comparison function.  */
+  htab_eq eq_f;
 
-extern hash_table_t create_hash_table
-  PARAMS ((size_t, unsigned (*) (hash_table_entry_t),
-	   int (*) (hash_table_entry_t, hash_table_entry_t)));
+  /* Pointer to cleanup function.  */
+  htab_del del_f;
 
-extern void delete_hash_table PARAMS ((hash_table_t));
+  /* Table itself.  */
+  void **entries;
 
-extern void empty_hash_table PARAMS ((hash_table_t));
+  /* Current size (in entries) of the hash table */
+  size_t size;
 
-extern hash_table_entry_t *find_hash_table_entry
-  PARAMS ((hash_table_t, hash_table_entry_t, int));
+  /* Current number of elements including also deleted elements */
+  size_t n_elements;
 
-extern void remove_element_from_hash_table_entry PARAMS ((hash_table_t,
-							  hash_table_entry_t));
+  /* Current number of deleted elements in the table */
+  size_t n_deleted;
 
-extern void clear_hash_table_slot PARAMS ((hash_table_t, hash_table_entry_t *));
+  /* The following member is used for debugging. Its value is number
+     of all calls of `htab_find_slot' for the hash table. */
+  unsigned int searches;
 
-extern void traverse_hash_table PARAMS ((hash_table_t,
-					 int (*) (hash_table_entry_t, void *),
-					 void *));
-    
-extern size_t hash_table_size PARAMS ((hash_table_t));
+  /* The following member is used for debugging.  Its value is number
+     of collisions fixed for time of work with the hash table. */
+  unsigned int collisions;
+};
 
-extern size_t hash_table_elements_number PARAMS ((hash_table_t));
+typedef struct htab *htab_t;
 
-extern int hash_table_collisions PARAMS ((hash_table_t));
+/* The prototypes of the package functions. */
 
-extern int all_hash_table_collisions PARAMS ((void));
+extern htab_t	htab_create	PARAMS ((size_t, htab_hash,
+					 htab_eq, htab_del));
+extern void	htab_delete	PARAMS ((htab_t));
+extern void	htab_empty	PARAMS ((htab_t));
+
+extern void    *htab_find	PARAMS ((htab_t, const void *));
+extern void   **htab_find_slot	PARAMS ((htab_t, const void *, int));
+extern void    *htab_find_with_hash		PARAMS ((htab_t, const void *,
+							 unsigned int));
+extern void   **htab_find_slot_with_hash	PARAMS ((htab_t, const void *,
+							 unsigned int, int));
+extern void	htab_clear_slot	PARAMS ((htab_t, void **));
+extern void	htab_remove_elt	PARAMS ((htab_t, void *));
+
+extern void	htab_traverse	PARAMS ((htab_t, htab_trav, void *));
+
+extern size_t	htab_size	PARAMS ((htab_t));
+extern size_t	htab_elements	PARAMS ((htab_t));
+extern double	htab_collisions	PARAMS ((htab_t));
 
 #ifdef __cplusplus
 }