X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/mLib/blobdiff_plain/dd3c57bc8cac59e0d657ee665ce462988d27d714..18c831dcd0ae4d660c70ccac69d27ed2a97851be:/assoc.h

diff --git a/assoc.h b/assoc.h
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--- a/assoc.h
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-/* -*-c-*-
- *
- * Assocation tables
- *
- * (c) 2000 Straylight/Edgeware
- */
-
-/*----- Licensing notice --------------------------------------------------*
- *
- * This file is part of the mLib utilities library.
- *
- * mLib is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Library General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * mLib 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 Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with mLib; if not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- */
-
-#ifndef MLIB_ASSOC_H
-#define MLIB_ASSOC_H
-
-#ifdef __cplusplus
-  extern "C" {
-#endif
-
-/*----- Header files ------------------------------------------------------*/
-
-#ifndef MLIB_ATOM_H
-#  include "atom.h"
-#endif
-
-#ifndef MLIB_HASH_H
-#  include "hash.h"
-#endif
-
-/*----- Data structures ---------------------------------------------------*/
-
-typedef struct assoc_table {
-  hash_table t;
-  size_t load;
-} assoc_table;
-
-typedef struct assoc_base {
-  hash_base b;
-  atom *a;
-} assoc_base;
-
-typedef struct { hash_iter i; } assoc_iter;
-
-#define ASSOC_ATOM(p) (((assoc_base *)(p))->a + 0)
-
-/*----- Functions provided ------------------------------------------------*/
-
-/* --- @assoc_create@ --- *
- *
- * Arguments:	@assoc_table *t@ = pointer to an association table
- *
- * Returns:	---
- *
- * Use:		Creates a new association table.
- */
-
-extern void assoc_create(assoc_table */*t*/);
-
-/* --- @assoc_destroy@ --- *
- *
- * Arguments:	@assoc_table *t@ = pointer to an association table
- *
- * Returns:	---
- *
- * Use:		Destroys an association table.
- */
-
-extern void assoc_destroy(assoc_table */*t*/);
-
-/* --- @assoc_find@ --- *
- *
- * Arguments:	@assoc_table *t@ = pointer to an association table
- *		@atom *a@ = an atom to label the item
- *		@size_t sz@ = size of block to allocate
- *		@unsigned *f@ = pointer to `found' flag
- *
- * Returns:	A pointer to the item located or null.
- *
- * Use:		Looks up an atom in an association table.  If the atom is
- *		found, the association is returned.  If not, and @sz@ is
- *		zero, a null pointer is returned.  Otherwise, a block of size
- *		@sz@ is allocated, its @assoc_base@ header is filled in, and
- *		the pointer returned.  The flag @*f@ is cleared if the item
- *		couldn't be found, or set if it was.
- *
- *		All the atoms used in a particular table should
- */
-
-extern void *assoc_find(assoc_table */*t*/, atom */*a*/,
-			size_t /*sz*/, unsigned */*f*/);
-
-/* --- @assoc_remove@ --- *
- *
- * Arguments:	@assoc_table *t@ = pointer to an association table
- *		@void *p@ = pointer to a block to remove
- *
- * Returns:	---
- *
- * Use:		Removes an association from a table.
- */
-
-extern void assoc_remove(assoc_table */*t*/, void */*p*/);
-
-/* --- @assoc_mkiter@, @assoc_next@ --- *
- *
- * Arguments:	@assoc_iter *i@ = pointer to an iterator
- *		@assoc_table *t@ = pointer to an association table
- *
- * Returns:	Next association, or null, for @assoc_next@; nothing for
- *		@assoc_mkiter@.
- *
- * Use:		Iterates over the associations in a table.
- */
-
-#define ASSOC_MKITER(i_, t_) HASH_MKITER(&(i_)->i, &(t_)->t)
-
-#define ASSOC_NEXT(i_, p) do {						\
-  hash_base *_q;							\
-  HASH_NEXT(&(i_)->i, _q);						\
-  (p) = (void *)_q;							\
-} while (0)
-
-extern void assoc_mkiter(assoc_iter */*i*/, assoc_table */*t*/);
-extern void *assoc_next(assoc_iter */*i*/);
-
-/*----- That's all, folks -------------------------------------------------*/
-
-#ifdef __cplusplus
-  }
-#endif
-
-#endif