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  1. /**************************************************************************
  2.  *
  3.  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
  4.  * All Rights Reserved.
  5.  *
  6.  * Permission is hereby granted, free of charge, to any person obtaining a
  7.  * copy of this software and associated documentation files (the
  8.  * "Software"), to deal in the Software without restriction, including
  9.  * without limitation the rights to use, copy, modify, merge, publish,
  10.  * distribute, sub license, and/or sell copies of the Software, and to
  11.  * permit persons to whom the Software is furnished to do so, subject to
  12.  * the following conditions:
  13.  *
  14.  * The above copyright notice and this permission notice (including the
  15.  * next paragraph) shall be included in all copies or substantial portions
  16.  * of the Software.
  17.  *
  18.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21.  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22.  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23.  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24.  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25.  *
  26.  **************************************************************************/
  27.  
  28. /**
  29.  * General purpose hash table.
  30.  *  
  31.  * @author José Fonseca <jrfonseca@tungstengraphics.com>
  32.  */
  33.  
  34. #ifndef U_HASH_TABLE_H_
  35. #define U_HASH_TABLE_H_
  36.  
  37.  
  38. #include "pipe/p_defines.h"
  39.  
  40.  
  41. #ifdef __cplusplus
  42. extern "C" {
  43. #endif
  44.  
  45.    
  46. /**
  47.  * Generic purpose hash table.
  48.  */
  49. struct util_hash_table;
  50.  
  51.  
  52. /**
  53.  * Create an hash table.
  54.  *
  55.  * @param hash hash function
  56.  * @param compare should return 0 for two equal keys.
  57.  */
  58. struct util_hash_table *
  59. util_hash_table_create(unsigned (*hash)(void *key),
  60.                        int (*compare)(void *key1, void *key2));
  61.  
  62.  
  63. enum pipe_error
  64. util_hash_table_set(struct util_hash_table *ht,
  65.                     void *key,
  66.                     void *value);
  67.  
  68. void *
  69. util_hash_table_get(struct util_hash_table *ht,
  70.                     void *key);
  71.  
  72.  
  73. void
  74. util_hash_table_remove(struct util_hash_table *ht,
  75.                        void *key);
  76.  
  77.  
  78. void
  79. util_hash_table_clear(struct util_hash_table *ht);
  80.  
  81.  
  82. enum pipe_error
  83. util_hash_table_foreach(struct util_hash_table *ht,
  84.                         enum pipe_error (*callback)
  85.                         (void *key, void *value, void *data),
  86.                         void *data);
  87.  
  88. void
  89. util_hash_table_destroy(struct util_hash_table *ht);
  90.  
  91.  
  92. #ifdef __cplusplus
  93. }
  94. #endif
  95.  
  96. #endif /* U_HASH_TABLE_H_ */
  97.