Campbell Barton
01f8b229c9
also use gcc attributes for smallhash header and some style edits to recent commit.
86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
/*
|
|
* ***** BEGIN GPL LICENSE BLOCK *****
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*
|
|
* The Original Code is Copyright (C) 2008 Blender Foundation.
|
|
* All rights reserved.
|
|
*
|
|
* The Original Code is: all of this file.
|
|
*
|
|
* Contributor(s): Joseph Eagar.
|
|
*
|
|
* ***** END GPL LICENSE BLOCK *****
|
|
*/
|
|
|
|
#ifndef __BLI_SMALLHASH_H__
|
|
#define __BLI_SMALLHASH_H__
|
|
|
|
/** \file BLI_smallhash.h
|
|
* \ingroup bli
|
|
*/
|
|
|
|
/* a light stack-friendly hash library,
|
|
* (it uses stack space for smallish hash tables) */
|
|
|
|
/* based on a doubling non-chaining approach */
|
|
|
|
typedef struct {
|
|
uintptr_t key;
|
|
void *val;
|
|
} SmallHashEntry;
|
|
|
|
/*how much stack space to use before dynamically allocating memory*/
|
|
#define SMSTACKSIZE 521
|
|
typedef struct SmallHash {
|
|
SmallHashEntry *table;
|
|
SmallHashEntry _stacktable[SMSTACKSIZE];
|
|
SmallHashEntry _copytable[SMSTACKSIZE];
|
|
SmallHashEntry *stacktable, *copytable;
|
|
int used;
|
|
int curhash;
|
|
int size;
|
|
} SmallHash;
|
|
|
|
typedef struct {
|
|
SmallHash *hash;
|
|
int i;
|
|
} SmallHashIter;
|
|
|
|
#ifdef __GNUC__
|
|
# define ATTR_NONULL_FIRST __attribute__((nonnull(1)))
|
|
# define ATTR_UNUSED_RESULT __attribute__((warn_unused_result))
|
|
#else
|
|
# define ATTR_NONULL_FIRST
|
|
# define ATTR_UNUSED_RESULT
|
|
#endif
|
|
|
|
|
|
void BLI_smallhash_init(SmallHash *hash) ATTR_NONULL_FIRST;
|
|
void BLI_smallhash_release(SmallHash *hash) ATTR_NONULL_FIRST;
|
|
void BLI_smallhash_insert(SmallHash *hash, uintptr_t key, void *item) ATTR_NONULL_FIRST;
|
|
void BLI_smallhash_remove(SmallHash *hash, uintptr_t key) ATTR_NONULL_FIRST;
|
|
void *BLI_smallhash_lookup(SmallHash *hash, uintptr_t key) ATTR_NONULL_FIRST ATTR_UNUSED_RESULT;
|
|
int BLI_smallhash_haskey(SmallHash *hash, uintptr_t key) ATTR_NONULL_FIRST;
|
|
int BLI_smallhash_count(SmallHash *hash) ATTR_NONULL_FIRST;
|
|
void *BLI_smallhash_iternext(SmallHashIter *iter, uintptr_t *key) ATTR_NONULL_FIRST ATTR_UNUSED_RESULT;
|
|
void *BLI_smallhash_iternew(SmallHash *hash, SmallHashIter *iter, uintptr_t *key) ATTR_NONULL_FIRST ATTR_UNUSED_RESULT;
|
|
/* void BLI_smallhash_print(SmallHash *hash); */ /* UNUSED */
|
|
|
|
#undef ATTR_NONULL_FIRST
|
|
#undef ATTR_UNUSED_RESULT
|
|
|
|
#endif /* __BLI_SMALLHASH_H__ */
|