/usr/include/directfb/direct/hash.h is in libdirectfb-dev 1.7.7-8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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(c) Copyright 2012-2013 DirectFB integrated media GmbH
(c) Copyright 2001-2013 The world wide DirectFB Open Source Community (directfb.org)
(c) Copyright 2000-2004 Convergence (integrated media) GmbH
All rights reserved.
Written by Denis Oliver Kropp <dok@directfb.org>,
Andreas Shimokawa <andi@directfb.org>,
Marek Pikarski <mass@directfb.org>,
Sven Neumann <neo@directfb.org>,
Ville Syrjälä <syrjala@sci.fi> and
Claudio Ciccani <klan@users.sf.net>.
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 2 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#ifndef __DIRECT__HASH_H__
#define __DIRECT__HASH_H__
#include <direct/types.h>
/**********************************************************************************************************************/
typedef struct {
unsigned long key;
void *value;
} DirectHashElement;
#define DIRECT_HASH_ELEMENT_REMOVED ((void *) -1)
struct __D_DirectHash {
int magic;
int size;
int count;
int removed;
DirectHashElement *Elements;
bool disable_debugging_alloc;
};
/**********************************************************************************************************************/
#define DIRECT_HASH_INIT( __size, __disable_debugging_alloc ) \
{ \
0x0b161321, \
(__size < 17 ? 17 : __size), \
0, \
0, \
NULL, \
__disable_debugging_alloc \
}
/* Hmm, not constant? .magic = D_MAGIC( "DirectHash" ), */
/**********************************************************************************************************************/
#define DIRECT_HASH_ASSERT( hash ) \
do { \
D_MAGIC_ASSERT( hash, DirectHash ); \
D_ASSERT( (hash)->size > 0 ); \
D_ASSERT( (hash)->Elements != NULL || (hash)->count == 0 ); \
D_ASSERT( (hash)->Elements != NULL || (hash)->removed == 0 ); \
D_ASSERT( (hash)->count + (hash)->removed < (hash)->size ); \
} while (0)
/**********************************************************************************************************************/
/*
* Hash iteration callback, return false to abort iteration.
*/
typedef bool (*DirectHashIteratorFunc)( DirectHash *hash,
unsigned long key,
void *value,
void *ctx );
/***********************************************************************************************************************
** Full create including allocation ...
*/
DirectResult DIRECT_API direct_hash_create ( int size,
DirectHash **ret_hash );
void DIRECT_API direct_hash_destroy( DirectHash *hash );
/***********************************************************************************************************************
** ... or just initialization of static data...
*/
void DIRECT_API direct_hash_init ( DirectHash *hash,
int size );
void DIRECT_API direct_hash_deinit ( DirectHash *hash );
/**********************************************************************************************************************/
int DIRECT_API direct_hash_count ( DirectHash *hash );
DirectResult DIRECT_API direct_hash_insert ( DirectHash *hash,
unsigned long key,
void *value );
DirectResult DIRECT_API direct_hash_remove ( DirectHash *hash,
unsigned long key );
void DIRECT_API *direct_hash_lookup ( const DirectHash *hash,
unsigned long key );
void DIRECT_API direct_hash_iterate( DirectHash *hash,
DirectHashIteratorFunc func,
void *ctx );
#endif
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