/* An expandable hash tables datatype.
- Copyright (C) 1999 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2000, 2002, 2003 Free Software Foundation, Inc.
Contributed by Vladimir Makarov (vmakarov@cygnus.com).
This program is free software; you can redistribute it and/or modify
extern "C" {
#endif /* __cplusplus */
-#include <ansidecl.h>
+#include "ansidecl.h"
+
+#ifndef GTY
+#define GTY(X)
+#endif
+
+/* The type for a hash code. */
+typedef unsigned int hashval_t;
/* Callback function pointer types. */
/* Calculate hash of a table entry. */
-typedef unsigned int (*htab_hash) PARAMS ((const void *));
+typedef hashval_t (*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
htab_traverse. Return 1 to continue scan, 0 to stop. */
typedef int (*htab_trav) PARAMS ((void **, void *));
+/* Memory-allocation function, with the same functionality as calloc().
+ Iff it returns NULL, the hash table implementation will pass an error
+ code back to the user, so if your code doesn't handle errors,
+ best if you use xcalloc instead. */
+typedef PTR (*htab_alloc) PARAMS ((size_t, size_t));
+
+/* We also need a free() routine. */
+typedef void (*htab_free) PARAMS ((PTR));
+
+/* Memory allocation and deallocation; variants which take an extra
+ argument. */
+typedef PTR (*htab_alloc_with_arg) PARAMS ((void *, size_t, size_t));
+typedef void (*htab_free_with_arg) 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. */
+ functions mentioned below. The size of this structure is subject to
+ change. */
-struct htab
+struct htab GTY(())
{
/* Pointer to hash function. */
htab_hash hash_f;
htab_del del_f;
/* Table itself. */
- void **entries;
+ PTR * GTY ((use_param (""), length ("%h.size"))) entries;
/* Current size (in entries) of the hash table */
size_t size;
/* 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;
+
+ /* Pointers to allocate/free functions. */
+ htab_alloc alloc_f;
+ htab_free free_f;
+
+ /* Alternate allocate/free functions, which take an extra argument. */
+ PTR GTY((skip (""))) alloc_arg;
+ htab_alloc_with_arg alloc_with_arg_f;
+ htab_free_with_arg free_with_arg_f;
};
typedef struct htab *htab_t;
+/* An enum saying whether we insert into the hash table or not. */
+enum insert_option {NO_INSERT, INSERT};
+
/* The prototypes of the package functions. */
-extern htab_t htab_create PARAMS ((size_t, htab_hash,
- htab_eq, htab_del));
+extern htab_t htab_create_alloc PARAMS ((size_t, htab_hash,
+ htab_eq, htab_del,
+ htab_alloc, htab_free));
+
+extern htab_t htab_create_alloc_ex PARAMS ((size_t, htab_hash,
+ htab_eq, htab_del,
+ PTR, htab_alloc_with_arg,
+ htab_free_with_arg));
+
+/* Backward-compatibility functions. */
+extern htab_t htab_create PARAMS ((size_t, htab_hash, htab_eq, htab_del));
+extern htab_t htab_try_create PARAMS ((size_t, htab_hash, htab_eq, htab_del));
+
+extern void htab_set_functions_ex PARAMS ((htab_t, htab_hash,
+ htab_eq, htab_del,
+ PTR, htab_alloc_with_arg,
+ htab_free_with_arg));
+
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 PTR htab_find PARAMS ((htab_t, const void *));
+extern PTR *htab_find_slot PARAMS ((htab_t, const void *,
+ enum insert_option));
+extern PTR htab_find_with_hash PARAMS ((htab_t, const void *,
+ hashval_t));
+extern PTR *htab_find_slot_with_hash PARAMS ((htab_t, const void *,
+ hashval_t,
+ enum insert_option));
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 void htab_traverse_noresize 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));
+/* A hash function for pointers. */
+extern htab_hash htab_hash_pointer;
+
+/* An equality function for pointers. */
+extern htab_eq htab_eq_pointer;
+
+/* A hash function for null-terminated strings. */
+extern hashval_t htab_hash_string PARAMS ((const PTR));
+
+/* An iterative hash function for arbitrary data. */
+extern hashval_t iterative_hash PARAMS ((const PTR, size_t, hashval_t));
+/* Shorthand for hashing something with an intrinsic size. */
+#define iterative_hash_object(OB,INIT) iterative_hash (&OB, sizeof (OB), INIT)
+
#ifdef __cplusplus
}
#endif /* __cplusplus */
projects / deliverable / binutils-gdb.git / blobdiff