src/util/tests/hash_table/delete_and_lookup.c

   1 /*
   2  * Copyright © 2009 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Eric Anholt <eric@anholt.net>
  25  */
  26
  27 #include <stdlib.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include <assert.h>
  31 #include "hash_table.h"
  32
  33 /* Return collisions, so we can test the deletion behavior for chained
  34  * objects.
  35  */
  36 static uint32_t
  37 badhash(const void *key)
  38 {
  39         return 1;
  40 }
  41
  42 int
  43 main(int argc, char **argv)
  44 {
  45         struct hash_table *ht;
  46         const char *str1 = "test1";
  47         const char *str2 = "test2";
  48         struct hash_entry *entry;
  49
  50         ht = _mesa_hash_table_create(NULL, badhash, _mesa_key_string_equal);
  51
  52         _mesa_hash_table_insert(ht, str1, NULL);
  53         _mesa_hash_table_insert(ht, str2, NULL);
  54
  55         entry = _mesa_hash_table_search(ht, str2);
  56         assert(strcmp(entry->key, str2) == 0);
  57
  58         entry = _mesa_hash_table_search(ht, str1);
  59         assert(strcmp(entry->key, str1) == 0);
  60
  61         _mesa_hash_table_remove(ht, entry);
  62
  63         entry = _mesa_hash_table_search(ht, str1);
  64         assert(entry == NULL);
  65
  66         entry = _mesa_hash_table_search(ht, str2);
  67         assert(strcmp(entry->key, str2) == 0);
  68
  69         _mesa_hash_table_destroy(ht, NULL);
  70
  71         return 0;
  72 }