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/*
* sptab.h - Sparse hashtable
*
* Copyright (c) 2009-2020 Shiro Kawai <shiro@acm.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the authors nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef GAUCHE_SPTAB_H
#define GAUCHE_SPTAB_H
#include <gauche.h>
#include <gauche/extend.h>
#if defined(EXTSPARSE_EXPORTS)
#define LIBGAUCHE_EXT_BODY
#endif
#include <gauche/extern.h> /* redefine SCM_EXTERN */
#include "ctrie.h"
typedef struct SparseTableRec {
SCM_HEADER;
CompactTrie trie;
u_long numEntries;
u_long (*hashfn)(ScmObj key);
int (*cmpfn)(ScmObj a, ScmObj b);
ScmComparator *comparator; /* only used for generic table */
} SparseTable;
SCM_CLASS_DECL(Scm_SparseTableClass);
#define SCM_CLASS_SPARSE_TABLE (&Scm_SparseTableClass)
#define SPARSE_TABLE(obj) ((SparseTable*)(obj))
#define SPARSE_TABLE_P(obj) SCM_XTYPEP(obj, SCM_CLASS_SPARSE_TABLE)
extern ScmObj MakeSparseTable(ScmHashType type, ScmComparator *data,
u_long flags);
extern ScmObj SparseTableRef(SparseTable *st, ScmObj key, ScmObj fallback);
extern ScmObj SparseTableSet(SparseTable *st, ScmObj key,
ScmObj value, int flags);
extern ScmObj SparseTableDelete(SparseTable *st, ScmObj key);
extern void SparseTableClear(SparseTable *st);
extern ScmObj SparseTableCopy(const SparseTable *st);
extern void SparseTableDump(SparseTable *sv);
extern void SparseTableCheck(SparseTable *sv);
/* Iterator */
typedef struct SparseTableIterRec {
SparseTable *st;
CompactTrieIter ctit;
ScmObj chain;
int end;
} SparseTableIter;
extern void SparseTableIterInit(SparseTableIter *it, SparseTable *st);
extern ScmObj SparseTableIterNext(SparseTableIter *it);
extern void Scm_Init_sptab(ScmModule *mod);
#endif /*GAUCHE_SPTAB_H*/
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