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