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

/* classes: h_files */

#ifndef SCM_HASHTAB_H
#define SCM_HASHTAB_H

/* 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 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
 * 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
 */

\f

#include "libguile/__scm.h"

#include "weaks.h"

\f

#define SCM_HASHTABLEF_WEAK_CAR SCM_WVECTF_WEAK_KEY
#define SCM_HASHTABLEF_WEAK_CDR SCM_WVECTF_WEAK_VALUE

#define SCM_HASHTABLE_P(x) (!SCM_IMP (x) && SCM_TYP7(x) == scm_tc7_hashtable)
#define SCM_VALIDATE_HASHTABLE(pos, arg) \
  SCM_MAKE_VALIDATE_MSG (pos, arg, HASHTABLE_P, "hash-table")
#define SCM_HASHTABLE_VECTOR(h)  SCM_CELL_OBJECT_1 (h)
#define SCM_SET_HASHTABLE_VECTOR(x, v) SCM_SET_CELL_OBJECT_1 ((x), (v))
#define SCM_HASHTABLE(x)	   ((scm_t_hashtable *) SCM_CELL_WORD_2 (x))
#define SCM_HASHTABLE_FLAGS(x)	   (SCM_HASHTABLE (x)->flags)
#define SCM_HASHTABLE_WEAK_KEY_P(x) \
  (SCM_HASHTABLE_FLAGS (x) & SCM_HASHTABLEF_WEAK_CAR)
#define SCM_HASHTABLE_WEAK_VALUE_P(x) \
  (SCM_HASHTABLE_FLAGS (x) & SCM_HASHTABLEF_WEAK_CDR)
#define SCM_HASHTABLE_DOUBLY_WEAK_P(x)				\
  ((SCM_HASHTABLE_FLAGS (x)					\
    & (SCM_HASHTABLEF_WEAK_CAR | SCM_HASHTABLEF_WEAK_CDR))	\
   == (SCM_HASHTABLEF_WEAK_CAR | SCM_HASHTABLEF_WEAK_CDR))
#define SCM_HASHTABLE_WEAK_P(x)	   SCM_HASHTABLE_FLAGS (x)
#define SCM_HASHTABLE_N_ITEMS(x)   (SCM_HASHTABLE (x)->n_items)
#define SCM_SET_HASHTABLE_N_ITEMS(x, n)   (SCM_HASHTABLE (x)->n_items = n)
#define SCM_HASHTABLE_INCREMENT(x) (SCM_HASHTABLE_N_ITEMS(x)++)
#define SCM_HASHTABLE_DECREMENT(x) (SCM_HASHTABLE_N_ITEMS(x)--)
#define SCM_HASHTABLE_UPPER(x)     (SCM_HASHTABLE (x)->upper)
#define SCM_HASHTABLE_LOWER(x)     (SCM_HASHTABLE (x)->lower)

#define SCM_HASHTABLE_N_BUCKETS(h) \
 SCM_SIMPLE_VECTOR_LENGTH (SCM_HASHTABLE_VECTOR (h))
#define SCM_HASHTABLE_BUCKET(h, i) \
  SCM_SIMPLE_VECTOR_REF (SCM_HASHTABLE_VECTOR (h), i)
#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);

/* Function to fold over the entries of a hash table.  */
typedef SCM (*scm_t_hash_fold_fn) (void *closure, SCM key, SCM value,
				   SCM result);

/* Function to iterate over the handles (key-value pairs) of a hash
   table.  */
typedef SCM (*scm_t_hash_handle_fn) (void *closure, SCM handle);

typedef struct scm_t_hashtable {
  int flags;			/* properties of table */
  unsigned long n_items;	/* number of items in table */
  unsigned long lower;		/* when to shrink */
  unsigned long upper;		/* when to grow */
  int size_index;		/* index into hashtable_size */
  int min_size_index;		/* minimum size_index */
  scm_t_hash_fn hash_fn;  /* for rehashing after a GC. */
} scm_t_hashtable;

\f

SCM_API SCM scm_vector_to_hash_table (SCM vector);
SCM_API SCM scm_c_make_hash_table (unsigned long k);
SCM_API SCM scm_make_hash_table (SCM n);
SCM_API SCM scm_make_weak_key_hash_table (SCM k);
SCM_API SCM scm_make_weak_value_hash_table (SCM k);
SCM_API SCM scm_make_doubly_weak_hash_table (SCM k);

SCM_API SCM scm_hash_table_p (SCM h);
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, scm_t_hash_fn hash_fn,
				void *closure, const char *func_name);


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_t_hash_fold_fn fn, void *closure,
				    SCM init, SCM table);
SCM_API void scm_internal_hash_for_each_handle (scm_t_hash_handle_fn fn,
						void *closure, SCM table);
SCM_API SCM scm_hash_clear_x (SCM table);

SCM_API SCM scm_hashq_get_handle (SCM table, SCM obj);
SCM_API SCM scm_hashq_create_handle_x (SCM table, SCM obj, SCM init);
SCM_API SCM scm_hashq_ref (SCM table, SCM obj, SCM dflt);
SCM_API SCM scm_hashq_set_x (SCM table, SCM obj, SCM val);
SCM_API SCM scm_hashq_remove_x (SCM table, SCM obj);
SCM_API SCM scm_hashv_get_handle (SCM table, SCM obj);
SCM_API SCM scm_hashv_create_handle_x (SCM table, SCM obj, SCM init);
SCM_API SCM scm_hashv_ref (SCM table, SCM obj, SCM dflt);
SCM_API SCM scm_hashv_set_x (SCM table, SCM obj, SCM val);
SCM_API SCM scm_hashv_remove_x (SCM table, SCM obj);
SCM_API SCM scm_hash_get_handle (SCM table, SCM obj);
SCM_API SCM scm_hash_create_handle_x (SCM table, SCM obj, SCM init);
SCM_API SCM scm_hash_ref (SCM table, SCM obj, SCM dflt);
SCM_API SCM scm_hash_set_x (SCM table, SCM obj, SCM val);
SCM_API SCM scm_hash_remove_x (SCM table, SCM obj);
SCM_API SCM scm_hashx_get_handle (SCM hash, SCM assoc, SCM table, SCM obj);
SCM_API SCM scm_hashx_create_handle_x (SCM hash, SCM assoc, SCM table, SCM obj, SCM init);
SCM_API SCM scm_hashx_ref (SCM hash, SCM assoc, SCM table, SCM obj, SCM dflt);
SCM_API SCM scm_hashx_set_x (SCM hash, SCM assoc, SCM table, SCM obj, SCM val);
SCM_API SCM scm_hashx_remove_x (SCM hash, SCM assoc, SCM table, SCM obj);
SCM_API SCM scm_hash_fold (SCM proc, SCM init, SCM hash);
SCM_API SCM scm_hash_for_each (SCM proc, SCM hash);
SCM_API SCM scm_hash_for_each_handle (SCM proc, SCM hash);
SCM_API SCM scm_hash_map_to_list (SCM proc, SCM hash);
SCM_INTERNAL void scm_i_hashtable_print (SCM exp, SCM port, scm_print_state *pstate);
SCM_INTERNAL SCM scm_i_hashtable_equal_p (SCM x, SCM y);
SCM_INTERNAL void scm_init_hashtab (void);

#endif  /* SCM_HASHTAB_H */

/*
  Local Variables:
  c-file-style: "gnu"
  End:
*/
Commit	Line	Data
0f2d19dd JB	1	/* classes: h_files */
0f2d19dd JB	2
0527e687 DH	3	#ifndef SCM_HASHTAB_H
	4	#define SCM_HASHTAB_H
	5
d587c9e8	6	/* Copyright (C) 1995,1996,1999,2000,2001, 2003, 2004, 2006, 2008, 2009 Free Software Foundation, Inc.
0527e687	7	*
73be1d9e	8	* This library is free software; you can redistribute it and/or
53befeb7 NJ	9	* modify it under the terms of the GNU Lesser General Public License
	10	* as published by the Free Software Foundation; either version 3 of
	11	* the License, or (at your option) any later version.
0527e687	12	*
53befeb7 NJ	13	* This library is distributed in the hope that it will be useful, but
53befeb7 NJ	14	* WITHOUT ANY WARRANTY; without even the implied warranty of
73be1d9e MV	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
73be1d9e MV	16	* Lesser General Public License for more details.
0527e687	17	*
73be1d9e MV	18	* You should have received a copy of the GNU Lesser General Public
73be1d9e MV	19	* License along with this library; if not, write to the Free Software
53befeb7 NJ	20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
53befeb7 NJ	21	* 02110-1301 USA
73be1d9e	22	*/
0527e687	23
0f2d19dd	24	\f
0527e687	25
5e044c02	26	#include "libguile/__scm.h"
0f2d19dd	27
c35738c1 MD	28	#include "weaks.h"
	29
	30	\f
	31
	32	#define SCM_HASHTABLEF_WEAK_CAR SCM_WVECTF_WEAK_KEY
	33	#define SCM_HASHTABLEF_WEAK_CDR SCM_WVECTF_WEAK_VALUE
	34
c99de5aa	35	#define SCM_HASHTABLE_P(x) (!SCM_IMP (x) && SCM_TYP7(x) == scm_tc7_hashtable)
c35738c1 MD	36	#define SCM_VALIDATE_HASHTABLE(pos, arg) \
c35738c1 MD	37	SCM_MAKE_VALIDATE_MSG (pos, arg, HASHTABLE_P, "hash-table")
c99de5aa AW	38	#define SCM_HASHTABLE_VECTOR(h) SCM_CELL_OBJECT_1 (h)
	39	#define SCM_SET_HASHTABLE_VECTOR(x, v) SCM_SET_CELL_OBJECT_1 ((x), (v))
	40	#define SCM_HASHTABLE(x) ((scm_t_hashtable *) SCM_CELL_WORD_2 (x))
c35738c1 MD	41	#define SCM_HASHTABLE_FLAGS(x) (SCM_HASHTABLE (x)->flags)
	42	#define SCM_HASHTABLE_WEAK_KEY_P(x) \
	43	(SCM_HASHTABLE_FLAGS (x) & SCM_HASHTABLEF_WEAK_CAR)
	44	#define SCM_HASHTABLE_WEAK_VALUE_P(x) \
	45	(SCM_HASHTABLE_FLAGS (x) & SCM_HASHTABLEF_WEAK_CDR)
	46	#define SCM_HASHTABLE_DOUBLY_WEAK_P(x) \
	47	((SCM_HASHTABLE_FLAGS (x) \
	48	& (SCM_HASHTABLEF_WEAK_CAR \| SCM_HASHTABLEF_WEAK_CDR)) \
	49	== (SCM_HASHTABLEF_WEAK_CAR \| SCM_HASHTABLEF_WEAK_CDR))
	50	#define SCM_HASHTABLE_WEAK_P(x) SCM_HASHTABLE_FLAGS (x)
	51	#define SCM_HASHTABLE_N_ITEMS(x) (SCM_HASHTABLE (x)->n_items)
	52	#define SCM_SET_HASHTABLE_N_ITEMS(x, n) (SCM_HASHTABLE (x)->n_items = n)
	53	#define SCM_HASHTABLE_INCREMENT(x) (SCM_HASHTABLE_N_ITEMS(x)++)
	54	#define SCM_HASHTABLE_DECREMENT(x) (SCM_HASHTABLE_N_ITEMS(x)--)
	55	#define SCM_HASHTABLE_UPPER(x) (SCM_HASHTABLE (x)->upper)
	56	#define SCM_HASHTABLE_LOWER(x) (SCM_HASHTABLE (x)->lower)
	57
	58	#define SCM_HASHTABLE_N_BUCKETS(h) \
3ebc1832 MV	59	SCM_SIMPLE_VECTOR_LENGTH (SCM_HASHTABLE_VECTOR (h))
	60	#define SCM_HASHTABLE_BUCKET(h, i) \
	61	SCM_SIMPLE_VECTOR_REF (SCM_HASHTABLE_VECTOR (h), i)
c35738c1	62	#define SCM_SET_HASHTABLE_BUCKET(h, i, x) \
3ebc1832	63	SCM_SIMPLE_VECTOR_SET (SCM_HASHTABLE_VECTOR (h), i, x)
c35738c1	64
d587c9e8 LC	65	/* Function that computes a hash of OBJ modulo MAX. */
	66	typedef unsigned long (*scm_t_hash_fn) (SCM obj, unsigned long max,
	67	void *closure);
	68
	69	/* Function that returns the value associated with OBJ in ALIST according to
	70	some equality predicate. */
	71	typedef SCM (scm_t_assoc_fn) (SCM obj, SCM alist, void closure);
	72
a07010bf LC	73	/* Function to fold over the entries of a hash table. */
	74	typedef SCM (scm_t_hash_fold_fn) (void closure, SCM key, SCM value,
	75	SCM result);
	76
	77	/* Function to iterate over the handles (key-value pairs) of a hash
	78	table. */
	79	typedef SCM (scm_t_hash_handle_fn) (void closure, SCM handle);
	80
c35738c1 MD	81	typedef struct scm_t_hashtable {
	82	int flags; /* properties of table */
	83	unsigned long n_items; /* number of items in table */
	84	unsigned long lower; /* when to shrink */
	85	unsigned long upper; /* when to grow */
	86	int size_index; /* index into hashtable_size */
	87	int min_size_index; /* minimum size_index */
d587c9e8	88	scm_t_hash_fn hash_fn; /* for rehashing after a GC. */
c35738c1 MD	89	} scm_t_hashtable;
c35738c1 MD	90
0f2d19dd	91	\f
0f2d19dd	92
f59a096e	93	SCM_API SCM scm_vector_to_hash_table (SCM vector);
33b001fd	94	SCM_API SCM scm_c_make_hash_table (unsigned long k);
f59a096e	95	SCM_API SCM scm_make_hash_table (SCM n);
c35738c1 MD	96	SCM_API SCM scm_make_weak_key_hash_table (SCM k);
	97	SCM_API SCM scm_make_weak_value_hash_table (SCM k);
	98	SCM_API SCM scm_make_doubly_weak_hash_table (SCM k);
	99
	100	SCM_API SCM scm_hash_table_p (SCM h);
	101	SCM_API SCM scm_weak_key_hash_table_p (SCM h);
	102	SCM_API SCM scm_weak_value_hash_table_p (SCM h);
	103	SCM_API SCM scm_doubly_weak_hash_table_p (SCM h);
	104
d587c9e8	105	SCM_INTERNAL void scm_i_rehash (SCM table, scm_t_hash_fn hash_fn,
102dbb6f	106	void closure, const char func_name);
00ffa0e7	107
d587c9e8 LC	108
	109	SCM_API SCM scm_hash_fn_get_handle (SCM table, SCM obj,
	110	scm_t_hash_fn hash_fn,
	111	scm_t_assoc_fn assoc_fn,
	112	void *closure);
	113	SCM_API SCM scm_hash_fn_create_handle_x (SCM table, SCM obj, SCM init,
	114	scm_t_hash_fn hash_fn,
	115	scm_t_assoc_fn assoc_fn,
	116	void *closure);
	117	SCM_API SCM scm_hash_fn_ref (SCM table, SCM obj, SCM dflt,
	118	scm_t_hash_fn hash_fn,
	119	scm_t_assoc_fn assoc_fn,
	120	void *closure);
	121	SCM_API SCM scm_hash_fn_set_x (SCM table, SCM obj, SCM val,
	122	scm_t_hash_fn hash_fn,
	123	scm_t_assoc_fn assoc_fn,
	124	void *closure);
	125	SCM_API SCM scm_hash_fn_remove_x (SCM table, SCM obj,
	126	scm_t_hash_fn hash_fn,
	127	scm_t_assoc_fn assoc_fn,
	128	void *closure);
a07010bf LC	129	SCM_API SCM scm_internal_hash_fold (scm_t_hash_fold_fn fn, void *closure,
	130	SCM init, SCM table);
	131	SCM_API void scm_internal_hash_for_each_handle (scm_t_hash_handle_fn fn,
	132	void *closure, SCM table);
c35738c1	133	SCM_API SCM scm_hash_clear_x (SCM table);
0f2d19dd	134
33b001fd MV	135	SCM_API SCM scm_hashq_get_handle (SCM table, SCM obj);
	136	SCM_API SCM scm_hashq_create_handle_x (SCM table, SCM obj, SCM init);
	137	SCM_API SCM scm_hashq_ref (SCM table, SCM obj, SCM dflt);
	138	SCM_API SCM scm_hashq_set_x (SCM table, SCM obj, SCM val);
	139	SCM_API SCM scm_hashq_remove_x (SCM table, SCM obj);
	140	SCM_API SCM scm_hashv_get_handle (SCM table, SCM obj);
	141	SCM_API SCM scm_hashv_create_handle_x (SCM table, SCM obj, SCM init);
	142	SCM_API SCM scm_hashv_ref (SCM table, SCM obj, SCM dflt);
	143	SCM_API SCM scm_hashv_set_x (SCM table, SCM obj, SCM val);
	144	SCM_API SCM scm_hashv_remove_x (SCM table, SCM obj);
	145	SCM_API SCM scm_hash_get_handle (SCM table, SCM obj);
	146	SCM_API SCM scm_hash_create_handle_x (SCM table, SCM obj, SCM init);
	147	SCM_API SCM scm_hash_ref (SCM table, SCM obj, SCM dflt);
	148	SCM_API SCM scm_hash_set_x (SCM table, SCM obj, SCM val);
	149	SCM_API SCM scm_hash_remove_x (SCM table, SCM obj);
	150	SCM_API SCM scm_hashx_get_handle (SCM hash, SCM assoc, SCM table, SCM obj);
	151	SCM_API SCM scm_hashx_create_handle_x (SCM hash, SCM assoc, SCM table, SCM obj, SCM init);
	152	SCM_API SCM scm_hashx_ref (SCM hash, SCM assoc, SCM table, SCM obj, SCM dflt);
	153	SCM_API SCM scm_hashx_set_x (SCM hash, SCM assoc, SCM table, SCM obj, SCM val);
a9cf5c71	154	SCM_API SCM scm_hashx_remove_x (SCM hash, SCM assoc, SCM table, SCM obj);
33b001fd	155	SCM_API SCM scm_hash_fold (SCM proc, SCM init, SCM hash);
c35738c1	156	SCM_API SCM scm_hash_for_each (SCM proc, SCM hash);
711a9fd7 MD	157	SCM_API SCM scm_hash_for_each_handle (SCM proc, SCM hash);
711a9fd7 MD	158	SCM_API SCM scm_hash_map_to_list (SCM proc, SCM hash);
c99de5aa AW	159	SCM_INTERNAL void scm_i_hashtable_print (SCM exp, SCM port, scm_print_state *pstate);
c99de5aa AW	160	SCM_INTERNAL SCM scm_i_hashtable_equal_p (SCM x, SCM y);
102dbb6f	161	SCM_INTERNAL void scm_init_hashtab (void);
0f2d19dd	162
0527e687	163	#endif /* SCM_HASHTAB_H */
89e00824 ML	164
	165	/*
	166	Local Variables:
	167	c-file-style: "gnu"
	168	End:
	169	*/