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/* x-hash.h -- basic hash table class
*
* Copyright (c) 2002-2012 Apple Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT
* HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name(s) of the above
* copyright holders shall not be used in advertising or otherwise to
* promote the sale, use or other dealings in this Software without
* prior written authorization.
*/
#ifndef X_HASH_H
#define X_HASH_H 1
#include <stdlib.h>
#include <assert.h>
typedef struct x_hash_table_struct x_hash_table;
typedef int (x_compare_fun)(const void *a, const void *b);
typedef unsigned int (x_hash_fun)(const void *k);
typedef void (x_destroy_fun)(void *x);
typedef void (x_hash_foreach_fun)(void *k, void *v, void *data);
/* for X_PFX and X_EXTERN */
#include "x-list.h"
X_EXTERN x_hash_table *X_PFX(hash_table_new) (x_hash_fun * hash,
x_compare_fun * compare,
x_destroy_fun * key_destroy,
x_destroy_fun * value_destroy);
X_EXTERN void X_PFX(hash_table_free) (x_hash_table * h);
X_EXTERN unsigned int X_PFX(hash_table_size) (x_hash_table * h);
X_EXTERN void X_PFX(hash_table_insert) (x_hash_table * h, void *k, void *v);
X_EXTERN void X_PFX(hash_table_replace) (x_hash_table * h, void *k, void *v);
X_EXTERN void X_PFX(hash_table_remove) (x_hash_table * h, void *k);
X_EXTERN void *X_PFX(hash_table_lookup) (x_hash_table * h,
void *k, void **k_ret);
X_EXTERN void X_PFX(hash_table_foreach) (x_hash_table * h,
x_hash_foreach_fun * fun,
void *data);
/* Conversion between unsigned int (e.g. xp_resource_id) and void pointer */
/* Forward declarations */
static __inline__ void *
X_PFX(cvt_uint_to_vptr) (unsigned int val) __attribute__((always_inline));
static __inline__ unsigned int
X_PFX(cvt_vptr_to_uint) (void * val) __attribute__((always_inline));
/* Implementations */
static __inline__ void *
X_PFX(cvt_uint_to_vptr) (unsigned int val) {
return (void *)((unsigned long)(val));
}
static __inline__ unsigned int
X_PFX(cvt_vptr_to_uint) (void * val) {
size_t sv = (size_t)val;
unsigned int uv = (unsigned int)sv;
/* If this assert fails, chances are val actually is a pointer,
or there's been memory corruption */
assert(sv == uv);
return uv;
}
#endif /* X_HASH_H */
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